WO2019188414A1 - Rim replacing mechanism provided to tire tester and rim replacing method - Google Patents
Rim replacing mechanism provided to tire tester and rim replacing method Download PDFInfo
- Publication number
- WO2019188414A1 WO2019188414A1 PCT/JP2019/010846 JP2019010846W WO2019188414A1 WO 2019188414 A1 WO2019188414 A1 WO 2019188414A1 JP 2019010846 W JP2019010846 W JP 2019010846W WO 2019188414 A1 WO2019188414 A1 WO 2019188414A1
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- WIPO (PCT)
- Prior art keywords
- rim
- spindle
- main body
- spring body
- testing machine
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C19/00—Tyre parts or constructions not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
Definitions
- the present invention relates to a rim replacement mechanism and a rim replacement method provided in a tire testing machine.
- tire testing machines capable of testing a plurality of tires having mutually different inner diameters or tread surface widths are known.
- a plurality of rims respectively corresponding to a plurality of tire sizes are used.
- a rim suitable for the size of the tire to be tested is attached to the spindle among the plurality of rims. Therefore, the tire testing machine includes a rim exchange mechanism that can attach and remove a rim to the spindle.
- Patent Document 1 discloses an upper rim and a lower rim capable of sandwiching a tire, an upper spindle and a lower spindle that hold the upper and lower rims with their respective axes coaxial, and an upper spindle about the axis.
- a tire inspection apparatus having an upper spindle housing that rotatably supports and an upper frame that holds the upper spindle housing is disclosed.
- the tire inspection apparatus disclosed in Patent Document 1 includes a rim replacement mechanism that replaces an upper rim fixed to the upper spindle with a permanent magnet.
- a plurality of permanent magnets that magnetize the upper rim are provided on the upper spindle of the tire inspection device around the axis of the upper spindle, and the upper frame presses the surface of the upper rim away from the upper spindle.
- a detaching means for pulling the upper rim magnetized by the permanent magnet away from the upper spindle is fixed to the upper frame and cannot be rotated integrally with the upper spindle.
- the rim replacement mechanism in a conventional tire testing machine further includes a lower spindle incorporating a magnet and a rim table on which a replacement rim is placed.
- the procedure for removing the rim attached to the spindle is as follows.
- the upper rim is pressed downward by the releasing means, the upper rim is removed from the upper spindle, and the upper rim is placed on the lower rim. Thereafter, the lower spindle is lowered in a state where the upper and lower rims are set (a state where the upper rim is disposed on the lower rim).
- the lower spindle When the lower rim hits the rim table with the upper and lower rims set, the upper and lower rims are transferred from the lower spindle to the rim table.
- the lower spindle further descends and stops at the lower limit position below the rim table.
- the procedure (mounting procedure) for attaching the upper and lower rims to each spindle is as follows. First, the lower spindle rises from the lower limit position described above, and the upper and lower rims placed on the rim table are transferred to the lower spindle.
- the upper rim is rapidly attracted to the upper spindle by the magnetic force (adsorption force) of the magnet. For this reason, the upper rim contacts the upper spindle vigorously. Since the impact force at the time of contact is very large, there is a problem that the contact surface (contact surface) between the upper rim and the upper spindle is easily damaged by this impact. Further, when the upper rim comes into contact with the upper spindle (at the time of magnetic attachment), a large impact sound is generated, which may deteriorate the working environment.
- JP 2010-127848 (FIG. 2 etc.)
- the present invention provides a rim exchanging mechanism and a rim exchanging method for a tire testing machine capable of alleviating an impact when the upper rim contacts the upper spindle when the upper rim is mounted on the upper spindle. For the purpose.
- an upper rim and a lower rim for sandwiching a tire, and an upper spindle to which the upper rim can be attached and detached, the upper rim being attached to the upper spindle.
- An upper spindle having a lower surface in contact with the upper surface and having a permanent magnet for fixing the upper rim mounted on the upper spindle to the upper spindle by a magnetic force; and a lower spindle on which the lower rim is mounted
- the rim replacement mechanism includes a pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body, and the main body portion in an upper position and a lower position. And an actuator that is displaced in the vertical direction within a range to include.
- the upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle.
- the lower position is a position below the upper position.
- the lower position is determined by moving the main body portion downward toward the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim. It is a position that allows the upper surface to be separated downward from the lower surface of the upper spindle.
- the spring body is configured to apply a downward pressing force to the main body disposed at the lower position.
- the length of the conveyance path F of the tire T in the conveyance direction of the tire T corresponds to the entire length of the tire testing machine 1.
- the horizontal direction intersecting with the conveyance path F, more precisely, the horizontal direction substantially orthogonal to the conveyance path F corresponds to the depth direction of the tire testing machine 1.
- the depth direction is also referred to as the left-right direction or the width direction of the tire testing machine 1.
- the tire testing machine 1 includes a lubrication unit 2, a tire testing unit 3, and a marking unit 4.
- the lubrication part 2 applies lubrication liquid to the bead part B of the tire T while rotating the tire T.
- the tire test unit 3 detects a singular point existing in the tire T by performing a tire test while rotating the tire T coated with the lubrication liquid in the lubrication unit 2 in the spindle unit 9.
- the marking unit 4 marks the tire T at a position in the circumferential direction of the tire T where the singular point exists.
- the lubrication part 2, the tire test part 3 and the marking part 4 are arranged in that order along the transport path F from the upstream side toward the downstream side.
- the lubrication part 2 is a part for applying lubrication liquid to the bead part B of the tire T carried in.
- the lubrication unit 2 includes a pair of left and right first conveyors 5 that conveys the tire T in a posture in which the tire T lies horizontally, and a pair of left and right tires that are carried by the pair of first conveyors 5. And an application part 7 for applying a lubrication liquid to the bead part B (inner peripheral edge) of the tire T held by the pair of arm parts 6.
- each of the pair of first conveyors 5 is a belt conveyor having a conveyor belt that is a loop-shaped belt forming an endless track, but the first conveyor 5 is limited to a belt conveyor system. Is not to be done.
- Rotating rollers 8 are rotatably provided at the respective tips of the pair of arm portions 6.
- the pair of arm units 6 sandwich the conveyed tire T from the left and right outer sides and bring the rotating roller 8 into contact with a tread surface that is an outer peripheral surface of the tire T.
- the rotating roller 8 rotates so as to allow the tire T to rotate around an axis that faces in the vertical direction.
- the application unit 7 is configured to be movable in the vertical direction.
- the application part 7 has a brush shape and rises to a position where it comes into contact with the bead part B of the tire T held by the pair of arm parts 6 to apply the lubrication liquid to the bead part B.
- the application unit 7 is returned to the position below the first conveyor 5 after application and stored.
- the pair of first conveyors 5 conveys the tire T to which the lubrication liquid has been applied from the lubrication unit 2 to the tire test unit 3.
- the tire test unit 3 includes a spindle unit 9, a drum 10, a pair of left and right second conveyors 11, and a rim table 13.
- the spindle unit 9 holds the tire T so as to allow the tire T to rotate about an axis that is directed in the vertical direction.
- the drum 10 has a cylindrical outer peripheral surface having a central axis facing in the vertical direction, and is disposed on the side of the spindle unit 9 so as to be rotatable around the central axis.
- the pair of second conveyors 11 conveys the tire T conveyed from the lubrication unit 2 with the tire T lying down horizontally.
- the rim table 13 has a horizontal rim mounting surface on which a plurality of rims 12 can be mounted.
- each of the pair of second conveyors 11 includes an upstream conveyor 11a and a downstream conveyor 11b disposed on the downstream side of the upstream conveyor 11a in the transport direction.
- Each of the upstream and downstream conveyors 11a and 11b is a belt conveyor having a conveyor belt that is a loop-shaped belt that forms an endless track.
- the tire test unit 3 further includes a rotation drive unit (not shown) that drives the spindle unit 9 to rotate.
- the spindle unit 9 has an upper spindle 9a and a lower spindle 9b.
- the upper spindle 9a and the lower spindle 9b are rod-like members that can rotate around a common axis that faces in the vertical direction.
- Each of the plurality of rims 12 includes an upper rim 12a attached to the lower end portion of the upper spindle 9a and a lower rim 12b attached to the upper end portion of the lower spindle 9b.
- the upper rim 12a and the lower rim 12b are arranged so that the tire T on the pair of second conveyors 11 can be sandwiched in the vertical direction.
- Each rim 12 has a structure that is divided into an upper rim 12a and a lower rim 12b.
- the drum 10 is arranged so that the outer peripheral surface of the drum 10 can come into contact with and separate from the tread surface of the tire T held by the spindle unit 9 in the radial direction of the tire T. It is arranged in the vicinity.
- the test of the tire T is performed by rotating the tire T at a predetermined rotation speed in a state where the outer peripheral surface of the drum 10 is in contact with the tread surface of the tire T held by the spindle unit 9.
- the drum 10 has a rotating shaft, and a load cell (not shown) for measuring a force or moment applied to the drum 10 from the rotating tire T is attached to the rotating shaft.
- the tire uniformity is calculated based on the result measured by the load cell, and the circumferential position and the axial position where the repulsive force of the tire T is maximized are measured as “singular points”.
- the tire test performed in the tire test unit 3 includes not only the measurement of the tire uniformity described above but also the measurement of the outer shape.
- the tire T on which the “singularity” is measured is rotated by a predetermined angle by the tire test unit 3 and then sent from the tire test unit 3 to the marking unit 4.
- the marking unit 4 includes a pair of left and right third conveyors 14 and a marking device 15.
- the pair of third conveyors 14 moves the tire T in the transport direction while keeping the tire T lying horizontally.
- the marking device 15 performs marking on a predetermined position of the tire T positioned on the pair of third conveyors 14 (for example, a predetermined position on the inner peripheral side of the tire T).
- each of the pair of third conveyors 14 is a belt conveyor having a conveyor belt that is a loop-shaped belt that forms an endless track.
- the marking device 15 uses a mark such as a uniformity mark indicating the “singularity” identified in the tire test,
- the tire uniformity is given to the circumferential direction position of the tire T having specificity.
- a mark other than the uniformity mark may be given to the tire T.
- the tire test unit 3 further includes a slide mechanism 22.
- the slide mechanism 22 moves the pair of upstream conveyors 11a in the pair of second conveyors 11 in the left-right direction so as to contact and separate from each other along the left-right direction. This is an interval changing mechanism for changing.
- the slide mechanism 22 is capable of sliding the pair of upstream conveyors 11a in the approaching / separating direction.
- the slide in the direction in which the pair of upstream conveyors 11a come in contact with and away from each other moves the rim 12 corresponding to the changed size below the second conveyor 11. It is possible to remove from the rim table 13 located.
- the distance between the pair of upstream conveyors 11a can be changed according to the outer diameter of the rim.
- the rim table 13 is made of a disk-shaped plate material and is disposed above the upper end of the lower spindle 9b in a state of being retracted downward.
- the tire test unit 3 further includes a rotation drive mechanism 18.
- the rotation drive mechanism 18 can support the rim table 13 and rotate the rim table 13 so that the rim table 13 can rotate about an axis that is directed in the vertical direction. That is, in this embodiment, the rim table 13 is a rotary table.
- the plurality of rims 12 having different sizes can be placed on the rim mounting surface of the rim table 13.
- the plurality of rims 12 can be placed at each of a plurality of positions aligned in the rotational circumferential direction of the rim table 13.
- the upper rim 12a and the lower rim 12b constituting each of the plurality of rims 12 mounted on the rim table 13 are mounted on the rim mounting surface in a state where they are stacked vertically, and the upper spindle 9a and the lower rim 12b are stacked. Each can be attached to a spindle 9b.
- the rim table 13 can be mounted with four rims 12 having different sizes from each other at four positions aligned in the rotational circumferential direction on the rim mounting surface.
- the rim table 13 is arranged so that the rotation center axis of the rim table 13 is located on the carry-out side (exit side) of the spindle unit 9 in the transport direction.
- the tire test section 3 has an automatic rim change function.
- the automatic rim change function has a size that matches the size of the loaded tire T even if tires T of various sizes having different inner peripheral diameters and different tread surface widths are loaded into the tire test section 3.
- the rim 12 is automatically replaced, and the tire test of the tire T can be continued without stagnation.
- the automatic rim change function automatically changes the rim 12 attached to the spindle unit 9 based on information such as the size of the next tire T carried in from the upstream lubrication unit 2.
- the rim 12 By changing to the rim 12 corresponding to the size of the tire T, etc., it is a function that makes it possible to cope with tire tests of tires T of various sizes.
- a rim exchanging mechanism 50 (specifically, a rim detaching mechanism) having an unconventional configuration for exchanging the upper rim 12a in the spindle unit 9, specifically, the upper spindle 9a. 51). Details will be described below.
- the tire testing machine 1 includes a frame 52 and a housing 53.
- a part of the frame 52 is arranged above the upstream conveyor 11a that conveys the tire T to be tested in a horizontal posture.
- a part of the frame 52 is provided above the upstream conveyor 11a so as to straddle the upstream conveyor 11a.
- the frame 52 includes an upper frame 52a that rotatably supports the upper spindle 9a, and a lower frame 52b that supports the upper frame 52a.
- a lower spindle 9b is provided below the upper spindle 9a.
- the housing 53 is provided on the lower frame 52b and rotatably supports the lower spindle 9b.
- the upper spindle 9a has an engaging portion.
- the engaging portion is provided on the lower end surface of the upper spindle 9a and has a concave portion that is recessed upward from the lower end surface.
- the upper spindle 9 a has a spindle body and a flange portion 55.
- the spindle body is a cylindrical portion extending in the vertical direction around the rotation center axis of the upper spindle 9a, and the flange portion 55 is a portion that extends in an annular shape radially outward from the outer peripheral surface of the spindle body. .
- the flange portion 55 is provided at the lower end portion of the spindle body.
- the flange portion 55 has a shape projecting radially outward from the outer peripheral surface of the lower end portion of the spindle body.
- a portion of the upper spindle 9a below the flange portion 55 is a portion where the engaging portion is provided.
- the upper spindle 9a has a lower surface 9S, and the upper rim 12a has an upper surface 12S.
- the upper surface 12S of the upper rim 12a is a surface that contacts the lower surface 9S of the upper spindle 9a in a state where the upper rim 12a is mounted on the upper spindle 9a.
- the lower surface 9S of the upper spindle 9a is a surface facing the upper surface 12S of the upper rim 12a in the vertical direction.
- the lower surface 9S of the upper spindle 9a is constituted by the lower surface of the flange portion 55.
- the lower surface 9S is configured by an annular surface centered on the rotation center axis of the upper spindle 9a in the bottom view.
- the annular surface is a surface configured by a region surrounded by two concentric circles having different diameters around the rotation center axis in the bottom view.
- the lower surface 9S of the flange portion 55 of the upper spindle 9a is a plane, more specifically, a plane orthogonal to the rotation center axis of the upper spindle 9a.
- the lower surface 9S is not limited to a flat surface, and may include a curved surface.
- the lower surface 9S may be a surface formed in a portion other than the flange portion 55 of the upper spindle 9a.
- the lower surface 9S of the upper spindle 9a does not have to be a lowermost surface among the surfaces of the upper spindle 9a.
- the lower surface 9S of the upper spindle 9a may be a surface that faces downward and faces the upper surface 12S of the upper rim 12a in the vertical direction.
- the upper surface 12S of the upper rim 12a is configured by an annular surface centering on the rotation center axis of the upper rim 12a in plan view.
- the annular surface is a surface constituted by a region surrounded by two concentric circles having different diameters around the rotation center axis of the upper rim 12a in plan view.
- the upper surface 12S of the upper rim 12a is a plane, more specifically, a plane orthogonal to the rotation center axis of the upper rim 12a.
- the upper surface 12S is not limited to a flat surface, and may include a curved surface.
- the upper surface 12S of the upper rim 12a may not be the uppermost surface of the surface of the upper rim 12a.
- the upper surface 12S of the upper rim 12a may be a surface that faces upward and faces the lower surface 9S of the upper spindle 9a in the vertical direction.
- the upper surface 12S of the upper rim 12a is a surface that faces the pressing surface 62S of the pressing member 62, which will be described later, in the vertical direction, and receives a downward pressing force by the pressing surface 62S.
- the upper surface 12S is a surface that contacts the lower surface 9S of the upper spindle 9a when the upper rim 12a is mounted on the upper spindle 9a.
- the portion of the upper surface 12S of the upper rim 12a that is in contact with the pressing surface 62S and the portion of the upper rim 12a that is in contact with the lower surface 9S have the same height, but the present invention is not limited to this. There may be.
- the flange portion 55 has at least one mounting portion 71.
- the flange portion 55 has a plurality of mounting portions 71.
- Each mounting portion 71 is constituted by a concave portion that is recessed upward from the lower surface 9S of the flange portion 55.
- the plurality of mounting portions 71 are arranged on the lower surface 9S at intervals in the circumferential direction.
- the upper spindle 9a has a plurality of permanent magnets 56.
- the plurality of permanent magnets 56 are arranged at intervals in the circumferential direction around the rotation center axis of the upper spindle 9a.
- the plurality of permanent magnets 56 have a function of fixing (magnetizing) the upper rim 12a to the upper spindle 9a by these magnetic forces.
- the upper rim 12 a is formed of a material attached to the permanent magnet 56.
- the plurality of permanent magnets 56 are accommodated in the plurality of mounting portions 71 formed on the lower surface 9S of the flange portion 55 of the upper spindle 9a. These permanent magnets 56 are accommodated in a plurality of mounting portions 71 that respectively open downward and have ceiling surfaces.
- the plurality of permanent magnets 56 generate a strong magnetic force below the lower surface 9S of the flange portion 55 of the upper spindle 9a. This enables the upper rim 12a to be magnetically attached to the upper spindle 9a, specifically, to be magnetically attached to the lower surface 9S of the flange portion 55 of the upper spindle 9a.
- the lower spindle 9 b is rotatably attached to the housing 53.
- the tire testing machine 1 further includes a lifting cylinder 72.
- the lifting cylinder 72 is provided so as to extend downward from the housing 53.
- the elevating cylinder 72 can elevate and lower the lower spindle 9b in the vertical direction.
- the upper end of the lower spindle 9b is formed in a tapered shape that becomes thinner as it goes upward.
- the upper end portion of the lower spindle 9b can be engaged with the engaging portion of the upper spindle 9a.
- the lower spindle 9b has a flange portion similar to the upper spindle 9a on the lower side of the tapered portion.
- a plurality of unillustrated permanent magnets are mounted on the upper surface of the flange portion.
- the lower rim 12b is fixed to the lower spindle 9b by the magnetic force of the permanent magnet of the lower spindle 9b.
- the upper rim 12a is disposed in a stacked state on the lower rim 12b.
- the lower spindle 9b is extended upward using the lifting cylinder 72 (the lower spindle 9b is displaced upward), and the upper rim 12a is generated by the magnetic force of the upper permanent magnet 56 provided on the flange portion 55 of the upper spindle 9a. Is fixed to the upper spindle 9a.
- the lower rim 12b is detached from the lower spindle 9b, the lower rim 12b is placed on the upper surface of the rim table 13 by the lower spindle 9b being displaced downward using the elevating cylinder 72.
- the rim table 13 restricts the lower rim 12b mounted thereon from moving downward. Accordingly, when the lower spindle 9b moves further downward, the lower rim 12b is removed from the lower spindle 9b and placed on the rim table 13.
- the upper spindle 9a is fixed to the frame 52 so as not to move up and down. For this reason, the method (detachment method) of removing the upper rim 12a from the upper spindle 9a is different from the above-described disconnection method related to the lower rim 12b.
- the rim replacement mechanism 50 includes a rim detachment mechanism 51 that forcibly separates the upper rim 12a fixed to the upper spindle 9a by the permanent magnet 56 from the upper spindle 9a.
- the rim detachment mechanism 51 has a configuration for pressing downward a portion of the upper surface 12S of the upper rim 12a that is spaced radially outward from the upper spindle 9a.
- the rim separation mechanism 51 will be specifically described.
- the rim removal mechanism 51 in the rim replacement mechanism 50 is configured such that the plurality of permanent magnets 56 in the upper spindle 9a pulls the upper rim 12a toward the upper spindle 9a and the weight of the upper rim 12a.
- the upper surface 12S of the upper rim 12a is pressed downward with a force larger than the value obtained by subtracting.
- the rim replacement mechanism 50 (rim removal mechanism 51) includes at least one pressing member 62 and at least one air cylinder 61 (actuator). Specifically, the rim replacement mechanism 50 according to the present embodiment has one pressing member 62 and a plurality of air cylinders 61. 5-7, only one pressing member 62 and one air cylinder 61 are shown. The plurality of air cylinders 61 are arranged around the upper spindle 9a at intervals in the circumferential direction. The pressing member 62 is disposed below the plurality of air cylinders 61.
- the pressing member 62 includes a main body portion 62A and an elastic portion 63.
- the main body 62A has at least one pressing surface 62S for applying a downward pressing force to the upper surface 12S of the upper rim 12a.
- the elastic portion 63 is provided to apply a vertical force to the main body portion 62A by its elastic force.
- the elastic portion 63 includes at least one first spring body 63a and at least one second spring body 63b.
- the first spring body 63a is disposed below the intermediate member 68 described later, and is mainly provided to apply a downward pressing force (elastic force) to the main body portion 62A.
- the second spring body 63b is disposed on the upper side of the intermediate member 68, and is mainly provided to support the body portion 62A by applying an upward pressing force (elastic force) to the body portion 62A. It has been.
- Each air cylinder 61 is for displacing the main body 62A of the pressing member 62 in the vertical direction within a range including an upper position and a lower position.
- the upper position is a position where the pressing surface 62S of the main body 62A is located above the upper surface 12S of the upper rim 12a mounted on the upper spindle 9a.
- the lower position is a position below the upper position. In the lower position, the main body 62A moves downward toward the lower position while the pressing surface 62S of the main body 62A applies the downward pressing force to the upper surface 12S of the upper rim 12a. Accordingly, as shown in FIG.
- the upper surface 12S of the upper rim 12a is a position that allows the lower surface 9S of the upper spindle 9a to be separated downward.
- the upper position is a position where the pressing surface 62S is disposed above the lower surface 9S of the upper spindle 9a
- the lower position is the position where the pressing surface 62S is the upper spindle 9a. It is a position arranged below the lower surface 9S.
- the main body 62A is configured to be vertically displaceable between the main body lower limit position and the main body upper limit position.
- the lower limit position of the main body portion is the lowest position in the range in which the main body portion 62A can be displaced in the vertical direction, and is the position of the main body portion 62A corresponding to the substantially lower stroke end in the air cylinder 61. is there.
- the upper limit position of the main body portion is the uppermost position in the range in which the main body portion 62A can be displaced in the vertical direction, and is the position of the main body portion 62A corresponding to the substantially upper stroke end in the air cylinder 61. .
- the lower position of the main body portion 62A may not be the main body portion lower limit position, but may be a position above the main body portion lower limit position. Further, the upper position of the main body portion 62A may not be the main body portion upper limit position, and may be a position below the main body portion upper limit position.
- the air cylinder 61 as the actuator operates to displace the main body 62A between the main body lower limit position and the main body upper limit position.
- FIG. 5 shows a state where the main body 62A is in the standby position.
- the standby position is the position of the main body portion 62A when the elastic force by the elastic portion 63 and the weight of the main body portion 62A are balanced.
- the pressing surface 62S of the main body 62A is disposed below the lower surface 9S of the upper spindle 9a.
- the standby position may be the same as the lower position, may be a position between the lower position and the main body lower limit position, or may be the same position as the main body lower limit position.
- the first spring body 63a When the main body 62A is disposed at the lower position, the first spring body 63a applies a downward pressing force to the main body 62A by its elastic force. When the standby position is further below the lower position, the first spring body 63a faces downward with respect to the main body 62A when the main body 62A is disposed at the standby position. However, it is not always necessary to apply a downward pressing force to the main body portion 62A. That is, when the main body 62A is disposed at a position further lower than the lower position, the first spring body 63a may be in a fully extended state.
- Each air cylinder 61 has a cylinder body 61A, a piston 74, and a cylinder rod 75.
- the cylinder body 61 ⁇ / b> A is a member having a cylindrical shape (specifically, a cylindrical shape) that partitions the cylinder chamber 73.
- the piston 74 is accommodated in the cylinder chamber 73 and defines the cylinder chamber 73 into an upper chamber 73U and a lower chamber 73D.
- the piston 74 is configured to be movable up and down in the cylinder chamber 73.
- the main body 62A of the pressing member 62 is configured to be displaced in the vertical direction as the piston 74 moves up and down in the vertical direction.
- the cylinder body 61A of each air cylinder 61 is attached to the frame 52 via a bracket.
- the air cylinder 61 can generate a pressing force downward.
- the number of installed air cylinders 61 is appropriately set according to the number of installed permanent magnets 56 and the strength of the magnetic force.
- the rim replacement mechanism 50 includes two air cylinders 61.
- the plurality of air cylinders 61 are preferably arranged at equal intervals in the circumferential direction. All the air cylinders 61 are configured to operate in synchronization with each other.
- Compressed air generated in a compressor (not shown) is supplied to the cylinder chamber 73 of the air cylinder 61.
- the cylinder rod 75 is connected to the lower end of the piston 74 and is configured to be movable in the vertical direction as the piston 74 moves up and down.
- the cylinder rod 75 is constituted by a rod-shaped member extending downward from the piston 74.
- the main body 62 ⁇ / b> A of the pressing member 62 is connected to the lower end of the cylinder rod 75.
- the rim replacement mechanism 50 further includes a switching valve 78, a controller 80, and a plurality of sensors.
- the cylinder body 61A of the air cylinder 61 has an upper port 76 that communicates with the upper chamber 73U of the cylinder chamber 73, and a lower port 77 that communicates with the lower chamber 73D.
- Each of the upper port 76 and the lower port 77 can be supplied with compressed air from a compressor (not shown).
- the compressor and each of the two ports 76 and 77 are connected by two pipes.
- the switching valve 78 is interposed between the compressor and the air cylinder 61, and can switch the supply state of compressed air to the two ports 76 and 77.
- the switching valve 78 is constituted by an electromagnetic switching valve or the like.
- the switching valve 78 is a valve capable of selectively switching the flow path.
- the switching valve 78 changes the supply state of the compressed air to “the state where the compressed air is supplied to the upper port 76 and the lower port 77 is opened”, “the compressed air is supplied to the lower port 77 and the upper side is opened. It is possible to switch between “a state in which the port 76 is opened” and “a state in which both the upper and lower ports 76 and 77 are opened”.
- the plurality of sensors include a first sensor (not shown) that can detect that the upper rim 12a is mounted on the upper spindle 9a, and a first sensor (not shown) that can detect the position of the piston 74 of the air cylinder 61. 2 sensors. Signals output from these sensors are input to the controller 80.
- the controller 80 is constituted by a computer or the like.
- the controller 80 has a switching valve control unit 81, a mounting state determination unit 82, and a piston position determination unit 83 as functions.
- the switching valve control unit 81 controls the operation of the switching valve 78.
- the mounting state determination unit 83 determines whether or not the upper rim 12a is mounted on the upper spindle 9a based on a signal input from the first sensor.
- the piston position determination unit 83 determines whether the piston 74 of the air cylinder 61 has reached the upper limit position based on a signal input from the second sensor.
- the switching valve 78 is configured as an electromagnetic switching valve that switches between a first allowable state, a second allowable state, and a blocking state based on a command signal output from the controller 80, for example.
- the first permissible state allows compressed air from the compressor to be supplied to the lower chamber 73D of the air cylinder 61 and allows air to be discharged from the upper chamber 73U.
- the second allowable state allows compressed air from the compressor to be supplied to the upper chamber 73U and allows air to be discharged from the lower chamber 73D.
- the blocking state allows air to be discharged from the upper chamber 73U and the lower chamber 73D, and prevents the compressed air from the compressor from being supplied to the upper chamber 73U and the lower chamber 73D. .
- the pressing member 62 is provided below the air cylinder 61.
- the elastic portion 63 of the pressing member 62 includes a plurality of first spring bodies 63a and a plurality of second spring bodies 63b.
- Each of the plurality of first spring bodies 63a and the plurality of second spring bodies 63b is a compression spring (coil spring), but is not limited to a compression spring and may be other types of springs.
- the main body 62A of the pressing member 62 includes at least one connector member 65 (an example of an upper member), at least one rod body 64, and at least one lower structure.
- the main body 62A has a plurality of connector members 65, a plurality of rods 64, and one lower structure (an example of a lower member), and the lower structure has at least one lower structure.
- One ring body 67 and at least one pressing piece 70 are included.
- the lower structure includes one ring body 67 and a plurality of pressing pieces 70.
- the first spring body 63a exerts a downward pressing force on the lower structure of the main body 62A when the main body 62A is disposed at the lower position. More specifically, it is configured to apply a downward pressing force to the ring body 67 of the lower structure.
- the plurality of connector members 65 are disposed at positions corresponding to the plurality of air cylinders 61, respectively. Each of the plurality of connector members 65 is connected to the lower end portion of the cylinder rod 75 of the corresponding air cylinder 61. Specifically, the lower end portion of the cylinder rod 75 is connected to the connector member 65 so as to be relatively movable with play in the vertical direction.
- each connector member 65 and the lower structure Between each connector member 65 and the lower structure, at least one of the plurality of rods 64 is interposed.
- Each of the plurality of rod bodies 64 is a rod-like member extending downward from the corresponding connector member 65.
- Each of the plurality of rod bodies 64 extends in the vertical direction between the corresponding connector member 65 and the ring body 67 of the lower structure to connect them.
- Each rod 64 passes through the corresponding first spring body 63a and second spring body 63b, and supports the first spring body 63a and the second spring body 63b.
- each rod body 64 is disposed so as to vertically penetrate the center portion of the first spring body 63a and the second spring body 63b arranged vertically via an intermediate member 68 described later. .
- Each rod body 64 is set to a length slightly shorter than the vertical length of the first spring body 63a and the second spring body 63b in a state where an external force is not applied (free length state). .
- the pressing member 62 transmits the pressing force generated by the air cylinder 61 to the upper surface 12S of the upper rim 12a and presses the upper rim 12a downward.
- the ring body 67 of the lower structure is connected to lower ends of the plurality of rod bodies 64.
- the plurality of pressing pieces 70 respectively extend downward from the lower surface of the ring body 67.
- the lower structure of the main body portion 62 ⁇ / b> A has a plurality of pressing surfaces 62 ⁇ / b> S, and the plurality of pressing surfaces 62 ⁇ / b> S are respectively configured by the lower surfaces of the plurality of pressing pieces 70. Note that the position and number of the plurality of pressing pieces 70 may not correspond to the position and number of the plurality of air cylinders 61.
- the rim replacement mechanism 50 further includes an intermediate member 68 (an example of a support member in the present invention) disposed between the connector member 65 and the lower structure.
- the relative position of the intermediate member 68 with respect to the cylinder body 61A is constant, and the relative position with respect to the upper spindle 9a is constant.
- the attachment position of the intermediate member 68 and the cylinder body 61A is not particularly limited as long as the relative position can be fixed.
- the intermediate member 68 and the cylinder main body 61A may be supported by the frame 52 via, for example, a bracket (not shown). Moreover, these may be supported by the part which does not rotate among the members which comprise the upper spindle 9a (for example, trunk
- the connector member 65 has a flange portion 66.
- the flange portion 66 has a shape protruding in the horizontal direction (for example, the front-rear direction).
- the upper end of the rod body 64 is connected to the lower surface of each flange portion 66.
- the first spring body 63a and the second spring body 63b are arranged so as to surround the rod body 64.
- Each bar 64 serves as a push bar, which is one of the functions of the pressing member 62.
- the lower end of each rod body 64 is connected to the upper surface of the ring body 67.
- each of the spring bodies constituting the elastic portion 63 is a compression spring.
- the plurality of first spring bodies 63 a are interposed between the ring body 67 and the intermediate member 68.
- the plurality of second spring bodies 63b are interposed between the intermediate member 68 and the corresponding connector member 65.
- Each of the plurality of first spring bodies 63a and the plurality of second spring bodies 63b has a shape that is long in the vertical direction and is configured to expand and contract in the vertical direction.
- the intermediate member 68 supports one end (upper end) of each of the plurality of first spring bodies 63a, and the ring body 67 is the other of the plurality of first spring bodies 63a. Supports the end (lower end).
- each of the plurality of first spring bodies 63 a is restricted from moving upward by the intermediate member 68, and is restricted from moving downward by the ring body 67.
- Each of the plurality of first spring bodies 63a contracts as the main body 62A moves upward relative to the intermediate member 68, and the main body 62A moves downward relative to the intermediate member 68. Stretches with relative movement.
- the intermediate member 68 supports one end (lower end) of each of the plurality of second spring bodies 63b, and each of the plurality of connector members 65 includes one of the plurality of second spring bodies 63b. The other end (upper end) of the corresponding second spring body 63b is supported. Thereby, each of the plurality of second spring bodies 63b is restricted from moving downward by the intermediate member 68 and is restricted from moving upward by the connector member 65.
- Each of the plurality of second spring bodies 63 b expands as the main body portion 62 ⁇ / b> A moves upward relative to the intermediate member 68, and the main body portion 62 ⁇ / b> A moves downward relative to the intermediate member 68. It contracts with relative movement.
- the intermediate member 68 has a plurality of insertion holes that penetrate the intermediate member 68 in the vertical direction.
- the plurality of rod bodies 64 are inserted through the plurality of insertion holes, respectively.
- a sliding bush 68a is disposed in each of the plurality of insertion holes of the intermediate member 68.
- the sliding bush 68 a guides the rod body 64 while reducing the resistance between the rod body 64 and the intermediate member 68.
- This sliding bush 68a has a cylindrical shape having a through-hole penetrating the sliding bush 68a in the vertical direction.
- the corresponding rod body 64 is slidably inserted into the through hole of the sliding bush 68a. That is, the sliding bush 68a is interposed between the inner peripheral surface of each of the plurality of insertion holes of the intermediate member 68 and the rod body 64 inserted through the insertion hole.
- the intermediate member 68 supports the plurality of rod bodies 64 via the plurality of sliding bushes 68a. For this reason, each of the plurality of rod bodies 64 is displaced only in one direction (only in the vertical direction), and is prevented from being displaced in a direction other than the vertical direction, for example, in the horizontal direction (horizontal direction). Therefore, in each of the plurality of rod bodies 64, problems such as shaft runout of the rod body 64 are suppressed. That is, the sliding bush 68a restricts the operation of the rod body 64 so that the rod body 64 only moves in the vertical direction. As a result, it is possible to prevent the ring body 67 from being inclined and the pressing surface 62S, which is the lower surface of the pressing piece 70, from pressing the upper surface 12S of the upper rim 12a unevenly.
- the sliding bush 68a has the main body 62A of the pressing member 62 stably in the vertical direction.
- the intermediate member 68 and the plurality of sliding bushes 68a restrict the operating directions of the plurality of rod bodies 64 in the vertical direction. Since the plurality of rod bodies 64 are a part of the main body portion 62A of the pressing member 62, when the main body portion 62A operates in the vertical direction, the main body portion 62A operates in a direction inclined with respect to the vertical direction. , And the inclination of the main body 62A is suppressed.
- the sliding bush 68a is not provided, the posture of the main body 62A (specifically, the ring body 67 and the pressing piece 70) may be inclined.
- the sliding bush 68a is provided in each of the plurality of insertion holes of the intermediate member 68, so that the operation direction of the main body 62A connected to the plurality of air cylinders 61 is inclined with respect to the vertical direction. , And the inclination of the main body 62A is suppressed.
- the reason why the first spring body 63a and the second spring body 63b are arranged separately on the upper and lower sides with the intermediate member 68 whose relative position to the cylinder body 61A is fixed as described above is as follows. This is to increase the degree of design freedom when setting an appropriate stroke and spring force of the elastic part 63 according to the weight of the elastic member 63. Specifically, it is as follows. If the first spring body 63a and the second spring body 63b are designed as an integral spring, the condition required for the elastic portion 63 is difficult to be satisfied by a general commercial product. It is necessary to prepare, and the cost increases.
- the degree of freedom in design of the elastic portion 63 Will increase. This makes it possible to expand the options for selecting the first spring body 63a and the second spring body 63b, thereby reducing the cost. Note that the stroke and spring force of the spring constituting the elastic portion 63 must satisfy the following conditions, and it is difficult for general commercial products to meet these conditions.
- the spring force (elastic force of the entire elastic portion 63) in the process of mounting the upper rim 12a on the upper spindle 9a is the point when the upper surface 12S of the upper rim 12a contacts the lower surface 62S of the pressing member 62 (a). Until the point (b) when the upper surface 12S of the upper rim 12a contacts the lower surface 9S of the flange portion 55. Specifically, at the time point (a), the spring force works upward to support the main body 62A, but turns downward between the time point (a) and the time point (b). In the time point (b), it works downward.
- the downward pressing force (the spring force of the elastic portion 63) applied by the first spring body 63a to the main body portion 62A is the permanent magnet.
- 56 is set to be smaller than a value obtained by subtracting the weight of the upper rim 12a from the magnetic force of 56.
- the pressing surface 62S positioned at the lower end of the pressing member 62 faces the upper surface 12S of the upper rim 12a in the vertical direction.
- the pressing surface 62S can apply a pressing force to the upper surface 12S of the upper rim 12a fixed (held) to the upper spindle 9a.
- the position where the pressing surface 62S presses the upper surface 12S of the upper rim 12a is a position outside the radial direction of the upper spindle 9a with respect to the position where the permanent magnet 56 is attached in the flange portion 55.
- the position where the pressing surface 62S presses the upper surface 12S is a position farther outward in the radial direction than the outer peripheral surface of the flange portion 55 in plan view.
- the pressing surface 62S of the pressing member 62 is a lower end surface of the pressing piece 70 that is connected to a ring body 67 provided so as to surround the upper spindle 9a and extends downward.
- the upper spindle 9 a is loosely fitted in the through hole 69 drilled in the center of the ring body 67.
- a plurality of pressing pieces 70 are provided so as to extend downward from the lower surface of the ring body 67.
- a pair of pressing pieces 70 are provided.
- Each pressing piece 70 has an arc shape along the outer periphery of the upper spindle 9a in plan view.
- FIG. 6 shows a state of the rim replacement mechanism 50 when the tire test is being performed.
- the switching valve 78 is switched to the first allowable state.
- the compressed air from the compressor is allowed to be supplied to the lower chamber 73D communicating with the lower port 77, and the air in the upper chamber 73U is discharged through the upper port 76. Allow that. That is, the compressed air compressed by the compressor is supplied only to the lower chamber 73D of the cylinder chamber 73 defined by the piston 74, and the piston 74 moves upward.
- the piston 74 and the cylinder rod 75 of the air cylinder 61 move upward, and the main body 62A (the pressing piece 70, the ring body 67, the rod body 64, and the connector member 65) of the pressing member 62 also move upward.
- the main body 62A of the pressing member 62 is in the upper position, and the lower end surface of the pressing piece 70, that is, the pressing surface 62S of the pressing member 62 is above the lower surface 9S of the upper spindle 9a and the lower surface of the permanent magnet 56. And is spaced upward from the upper surface 12S of the upper rim 12a.
- the upper rim 12a is mounted on the upper spindle 9a and fixed to the upper spindle 9a by the magnetic force of the permanent magnet 56.
- the lower rim 12b is attached to the lower spindle 9b and is fixed to the lower spindle 9b by the magnetic force of the permanent magnet.
- the upper and lower rims 12 a and 12 b are arranged at intervals in the vertical direction.
- FIG. 7 shows a state when the upper rim 12a is removed from the upper spindle 9a.
- the operation of the switching valve 78 is controlled so as to switch to
- the compressed air from the compressor is allowed to be supplied to the upper chamber 73U that communicates with the upper port 76 and the air from the lower chamber 73D that communicates with the lower port 77. Is allowed to be discharged.
- the compressed air compressed by the compressor is supplied only to the upper chamber 73U of the cylinder chamber 73 partitioned by the piston 74, and the piston 74 and the cylinder rod 75 move downward.
- the downward pressing force by the air cylinder 61 at this time exceeds the value obtained by subtracting the weight of the upper rim 12a from the force with which the permanent magnet 56 pulls the upper rim 12a toward the upper spindle 9a.
- the downward pressing force is transmitted to the upper surface 12S of the upper rim 12a through the connector member 65, the rod body 64, the ring body 67, and the pressing piece 70.
- the pressing force strongly presses the upper rim 12a downward. Therefore, the main body 62A of the pressing member 62 moves further downward from the position shown in FIG. 7 and reaches the lower position.
- the main body 62A moves downward toward the lower position while the pressing surface 62S of the main body 62A applies the downward pressing force to the upper surface 12S of the upper rim 12a.
- the upper surface 12S of the upper rim 12a can be separated downward from the lower surface 9S of the upper spindle 9a. Therefore, when the main body 62A reaches the lower position, the upper surface 12S of the upper rim 12a is disposed at a position spaced downward from the lower surface 9S of the upper spindle 9a.
- the piston 74 and the cylinder rod 75 are further moved downward by the downward pressing force generated by the compressed air.
- the main body 62A reaches the lower limit position of the main body.
- the upper rim 12a is reliably and quickly detached from the upper spindle 9a.
- the upper rim 12a detached from the upper spindle 9a in this way is lowered together with the lower spindle 9b while being arranged on the lower rim 12b. Thereby, the upper rim 12a is removed from the upper spindle 9a.
- the lower spindle 9b is further lowered and the lower rim 12b reaches the upper surface of the rim table 13, the lower rim 12b is detached from the lower spindle 9b, and the lower rim 12b and the The upper rim 12a overlapping the upper side is arranged.
- FIG. 5 shows a state when the upper rim 12a is mounted on the upper spindle 9a.
- the switching valve control unit 81 of the controller 80 blocks the switching valve 78 in a state where the upper rim 12a is detached from the upper spindle 9a. Control to switch to the state. Accordingly, the main body 62A is disposed at the standby position.
- the switching valve 78 When the switching valve 78 is switched to the blocking state, the switching valve 78 is in a state where both the upper and lower ports 76 and 77 are opened as shown in FIG.
- the first spring body 63a pushes downward when the main body 62A is disposed at the standby position.
- the pressure does not necessarily have to act on the main body 62A, and the downward pressing force by the first spring body 63a when the main body 62A is arranged at the lower position above the standby position. May act on the main body 62A.
- the pressing force (elastic force) of the first spring body 63a makes it possible to relieve an impact when the upper rim 12a is newly attached to the upper spindle 9a.
- the state of the rim replacement mechanism 50 shown in FIG. 5 is a standby state for waiting for the upper rim 12a to be mounted on the upper spindle 9a.
- the main body portion 62A In the standby state, the main body portion 62A is disposed at the standby position, and the lower end surface of the pressing piece 70 (that is, the lower surface 62S of the main body portion 62A of the pressing member 62) protrudes below the lower surface 9S of the flange portion 55. Yes.
- the spring constant of the elastic portion 63 is set so that the lower surface 62S of the main body 62A is positioned below the lower surface 9S of the upper spindle 9a.
- the spring constants of the spring bodies 63a and 63b and the lengths of the spring bodies 63a and 63b are set in consideration of, for example, the conditions 1 to 3 described above.
- the elastic portion 63 includes the first spring body 63 a disposed below the intermediate member 68 and the second spring body 63 b disposed above the intermediate member 68. including.
- the direction in which the spring force acts by the elastic portion 63 acts in two vertical directions. Is possible.
- the spring force of the elastic portion 63 can be adjusted by adjusting the length of each spring body, a degree of freedom in design is ensured.
- the lower spindle 9b with the upper rim 12a and the lower rim 12b placed on the upper end rises, and the upper surface 12S of the upper rim 12a
- the magnetic force of the permanent magnet 56 acts on the upper rim 12a, and the upper rim 12a is drawn upward toward the upper spindle 9a. It is done.
- the lower end surface 62S of the pressing piece 70 that is, the lower surface 62S of the main body portion 62A of the pressing member 62 is positioned below the lower surface 9S of the flange portion 55, so that it is attracted to the upper spindle 9a by magnetic force.
- the upper surface 12S of the upper rim 12a contacts the lower surface 62S of the main body portion 62A of the pressing member 62 prior to the lower surface 9S of the flange portion 55.
- the main body 62A in the standby position at the time of contact rises as the upper rim 12a rises so as to approach the lower surface 9S of the upper spindle 9a by the magnetic force.
- the pressing force of the first spring body 63a acts downward on the main body portion 62A, the impact when the upper surface 12S of the upper rim 12a comes into contact with the lower surface 9S of the upper spindle 9a is reduced.
- the spring body 63a is relaxed by contraction. As a result, it is possible to suppress the formation of scratches on the upper surface 12S and the lower surface 9S, which are magnetized surfaces (contact surfaces), and the generation of a large impact sound.
- the rim replacement mechanism 50 is switched again to the state shown in FIG. In such a state, the piston 74 moves upward, and the pressing piece 70 moves away from the upper surface 12S of the upper rim 12a.
- the state shown in FIG. 6 is a state where a tire test is possible. The procedure for removing the upper rim 12a by the rim replacement mechanism 50 from the state shown in FIG. 6 is as described above.
- the air cylinder 61 and the bracket that supports the air cylinder 61 are fixed to the upper frame 52a so as not to rotate integrally with the upper spindle 9a. That is, the rim replacement mechanism 50 has a structure that does not rotate with the rotation of the upper spindle 9a. Therefore, in the tire test, an error component due to the rotation of the rim replacement mechanism 50 is suppressed from being added to the uniformity measurement system. As a result, the uniformity can be measured with high accuracy.
- the rim exchanging mechanism 50 (rim removing mechanism 51) according to the present embodiment can suppress various adverse effects when the upper rim 12a is mounted on the upper spindle 9a.
- the length of the rod body 64, the lengths of the spring bodies 63a and 63b, and the position of the intermediate member 68 are adjusted so that a downward pressing force is applied to the main body portion 62A of the pressing member 62. ing.
- the elastic portion 63 relaxes the impact force when the upper rim 12a is mounted on the upper spindle 9a, and scratches and impact sounds on the upper surface 12S of the upper rim 12a and the lower surface 9S of the upper spindle 9a are alleviated.
- an air circuit is configured in which both ports 76 and 77 of the air cylinder 61 are opened. That is, in the standby state, the cylinder rod 75 of the air cylinder 61 can freely expand and contract.
- the controller 80 to which the signal is input causes the switching valve so that the piston 74 of the air cylinder 61 is raised. The operation of 78 is controlled.
- the controller 80 to which the signal is input controls the operation of the elevating cylinder 72 so that the lower spindle 9b is lowered. To do. Thereby, the upper rim 12a and the lower rim 12b are quickly fixed to the upper spindle 9a and the lower spindle 9b, respectively.
- the pressing surface 62S of the pressing member 62 that presses the upper surface 12S of the upper rim 12a is included in any of the upper rims 12a used in the tire test included in the range from the upper rim 12a having the smallest diameter to the upper rim 12a having the largest diameter. Even the upper rim 12a having the size is arranged at a position where it can be pressed.
- a pressing piece 70 rim 12 pressing member extending downward from the lower surface is provided on the lower surface of the ring body 67.
- the pressing surface 62S appropriately presses the upper surface 12S of the upper rim 12a.
- the pressing surface 62S can appropriately press the upper surface 12S of the upper rim 12a.
- the elastic portion 63 is divided into an upper second spring body 63 b and a lower first spring body 63 a through an intermediate member 68.
- the connector member 65 is provided with a play that allows the lower end portion of the cylinder rod 75 to move relative to the connector member 65 in the vertical direction. This play is provided in order to make the movement amount of the pressing member 62 smaller (shorter) than the stroke of the cylinder rod 75 of the air cylinder 61.
- the plurality of rims 12 having different sizes are placed on the rim mounting surface of the rim table 13. That is, in this embodiment, any one of the plurality of upper rims 12a having different sizes and weights can be mounted on the upper spindle 9a.
- the downward pressing force applied to the main body 62A by the first spring body 63a in a state where the upper rim 12a is mounted on the upper spindle 9a It is set to be smaller than a value obtained by subtracting the weight of the upper rim 12a having the maximum weight among the plurality of upper rims 12a that can be mounted on the spindle 9a.
- the rim replacement mechanism 50 in the tire testing machine 1 has the rim separation mechanism 51, and the pressing member 62 of the rim separation mechanism 51 includes the elastic portion 63. It is possible to suppress various adverse effects when the upper rim 12a is mounted on the upper spindle 9a.
- the tire testing machine employs a hydraulic cylinder (hydraulic jack) as a rim detaching mechanism to reduce the impact of the upper rim when it comes into contact with the upper spindle.
- a possible countermeasure is to use it. That is, the tire testing machine according to the countermeasure includes a rim detaching mechanism for removing the upper rim from the upper spindle, and the rim detaching mechanism is provided in a suspended state on the upper frame, and generates hydraulic pressure downward.
- a cylinder and a pressing member having a lower end that presses the upper rim using the pressing force of the hydraulic cylinder. That is, in the tire testing machine, the hydraulic cylinder of the rim separation mechanism is also used as a means for reducing the impact when the upper rim is magnetically attached.
- the upper rim when replacing the upper rim, the upper rim is removed, and the hydraulic cylinder is extended downward until another upper rim is mounted on the upper spindle, and the pressing member is pushed downward (rim pressing operation).
- the upper rim is magnetically attached to the upper spindle in this state, the upper rim is lifted by utilizing the cushion effect when the hydraulic cylinder is pushed back due to the difference between the downward pressing force of the hydraulic cylinder and the lifting force of the lower spindle.
- the impact force when the rim is installed is reduced.
- the sensor detects that the upper rim has been securely mounted, the pressure of the hydraulic jack is released, and the lower spindle moves down to complete the rim replacement operation. .
- this countermeasure may have the following problems.
- the above-described operation of the hydraulic cylinder operation for solving the problem when the upper rim is magnetized
- the rim replacement operation may be performed manually.
- the lower spindle on which the upper and lower rims are mounted is raised without the rim pushing operation being performed. Operation may be performed. In this case, the impact when the upper rim is mounted on the upper spindle is not relieved.
- a sensor may be provided for detecting that the upper rim is mounted on the upper spindle.
- the sensor does not detect the upper rim, the operation of removing the upper rim from the upper spindle is not performed.
- the sensor for detecting the upper rim malfunctions for some reason, and it is determined that the upper rim is not mounted even though the upper rim is mounted on the upper spindle.
- the hydraulic cylinder is used to achieve the two functions of detachment of the upper rim and shock buffering when the upper rim is mounted, the above-described various problems caused by this combined operation are completely eliminated. It is not solved.
- the first spring body 63a and the second spring body 63b are arranged via the intermediate member 68.
- the elastic portion 63 may include a first spring body 63a but not a second spring body 63b.
- the main body portion 62A when the main body portion 62A is disposed at the lower limit position of the main body portion, the main body portion 62A may be supported by, for example, the lower end portion of the cylinder rod 75 of the air cylinder 61, and the connector member 65.
- the lower surface of the intermediate member 68 may be supported by contacting the upper surface of the intermediate member 68.
- the rim replacement mechanism 50 includes a support member (intermediate member 68), but the present invention is not limited to this embodiment.
- the support member (intermediate member 68) may be omitted, and the elastic portion 63 may be composed of only at least one first spring body 63a.
- the lower end portion of the rod body 64 is fixed to the ring body 67 of the lower structure, while the upper end portion of the rod body 64 is a through hole provided in the upper member (connector member 65). It may be inserted. In this configuration, the rod body 64 can be moved relative to the connector member 65 in the vertical direction when the main body 62A moves up and down in the vertical direction.
- the present invention provides a rim exchanging mechanism and a rim exchanging method for a tire testing machine that can alleviate the impact when the upper rim contacts the upper spindle when the upper rim is mounted on the upper spindle.
- the purpose is to provide.
- the rim replacement mechanism is provided in the tire testing machine.
- the tire testing machine includes a plurality of rims for sandwiching a tire, each of the rims having an upper rim and a lower rim, and the upper rim of any rim selected from the plurality of rims.
- An upper spindle that can be mounted and removed, and has a lower surface in contact with the upper surface of the upper rim mounted on the upper spindle, and the upper rim mounted on the upper spindle is magnetically
- An upper spindle having a permanent magnet for fixing to the spindle, and a lower spindle to which the lower rim is attached.
- the rim exchange mechanism is a mechanism for exchanging the upper rim fixed to the upper spindle.
- the rim replacement mechanism includes a pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body, and the main body portion in an upper position and a lower position. And an actuator that is displaced in the vertical direction within a range to include.
- the upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle.
- the lower position is a position below the upper position, and the main body portion faces the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim.
- the upper surface of the upper rim can be moved downward from the lower surface of the upper spindle by moving downward.
- the spring body is configured to apply a downward pressing force to the main body disposed at the lower position.
- the main body portion of the pressing member is disposed at the upper position by the actuator.
- the pressing surface of the main body portion is located above the upper surface of the upper rim mounted on the upper spindle. It does not hinder the rotation of the upper rim and the upper spindle.
- the actuator moves the body portion of the pressing member downward to It is arranged at a lower position or a position below the lower position (for example, the standby position).
- the upper surface of the upper rim is moved upward by the main body moving to the lower position while the pressing surface of the main body applies a downward pressing force to the upper surface of the upper rim. It is possible to move downward from the lower surface of the spindle.
- the other upper rim is mounted on the upper spindle, the other upper rim located below the upper spindle in a state where the main body portion is disposed at the standby position is attached to the upper spindle. It can be approached.
- the upper rim approaches a distance that is sufficiently affected by the magnetic force of the permanent magnet in the upper spindle, the upper rim is attracted by the magnetic force and moves toward the upper spindle.
- the spring body is configured to apply a downward pressing force to the main body portion disposed at the lower position. Due to the downward pressing force of the spring body, the moving speed of the main body and the upper rim upward is suppressed. This enables the impact when the upper surface of the upper rim contacts the lower surface of the upper spindle to be mitigated by the downward pressing force by the spring body.
- the upper spindle is rotatably supported with respect to the frame of the tire testing machine, and the actuator is fixed to the frame. If the actuator is fixed to the upper spindle and rotates with the rotation of the upper spindle, an error component due to the rotation of the actuator is added to the measurement result of the tire test, so that the accuracy of the tire test is lowered.
- the actuator since the actuator is not fixed to the upper spindle but fixed to the frame, the actuator does not rotate even if the upper spindle rotates. This can suppress an error component due to rotation of the actuator from being added to the measurement result of the tire test in the tire test. Thereby, it can suppress that the precision of a tire test falls.
- the spring body is configured to expand and contract in the vertical direction, and the main body portion of the pressing member penetrates the spring body in the vertical direction and supports the spring body. It preferably contains a body.
- the spring body configured to expand and contract in the vertical direction is supported by the rod body penetrating the spring body in the vertical direction, the spring body is prevented from being deformed in directions other than the vertical direction. The This suppresses variation in downward pressing force applied by the spring body to the main body.
- the actuator includes a cylinder body that defines a cylinder chamber, and a piston that is accommodated in the cylinder chamber and divides the cylinder chamber into an upper chamber and a lower chamber, and the cylinder chamber
- the main body may be configured to be displaced in the vertical direction as the piston moves up and down in the vertical direction. In this aspect, the vertical displacement of the main body is achieved by the air cylinder.
- the rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the cylinder body and supporting one end of the spring body, and the body portion of the pressing member includes: The other end portion of the spring body may be supported, and the spring body may be configured to expand and contract in the vertical direction as the relative position of the main body portion in the vertical direction with respect to the support member changes.
- one end of the spring body is supported by a support member whose relative position with the cylinder body is unchanged, and the other end of the spring body has a relative position with the cylinder body that is in the vertical direction of the piston. It is supported by the main body that changes as the robot moves up and down.
- the spring body expands and contracts in the vertical direction as the relative position in the vertical direction of the main body with respect to the support member changes. This makes it possible to alleviate an impact when the upper surface of the upper rim contacts the lower surface of the upper spindle with a simple configuration in which the support member as described above is provided.
- the rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the cylinder body and supporting one end of the spring body, and the body portion of the pressing member includes: An upper member that can move up and down in conjunction with the lifting and lowering operation of the piston, a lower member positioned below the upper member, and extending downward from the upper member to the lower member so as to extend downward from the upper member and the lower member A rod that connects a side member, and the support member is interposed between the upper member and the lower member, and the support member penetrates the support member in the vertical direction and the rod body.
- the rim exchanging mechanism further includes a sliding bush arranged in the insertion hole of the support member, and the sliding bush passes through the sliding bush in the vertical direction and the rod body.
- the rod is configured to move up and down in conjunction with the upper member while being supported by the bush.
- the support member supports the rod body via the sliding bush.
- the tire testing machine rim replacement mechanism allows a compressed air to be supplied to the lower chamber of the cylinder chamber and allows air to be discharged from the upper chamber of the cylinder chamber. And a second allowable state in which the compressed air is allowed to be supplied to the upper chamber and air is allowed to be discharged from the lower chamber, and air is discharged from the upper chamber and the lower chamber.
- a switching valve capable of switching to a blocking state that permits and prevents the compressed air from being supplied to the upper chamber and the lower chamber, and a switching valve control unit that controls the operation of the switching valve.
- the switching valve control unit When the tire test is performed, the switching valve control unit performs control to switch the switching valve to the first allowable state so that the main body portion of the pressing member is disposed at the upper position, in front When the upper rim is removed from the upper spindle, control is performed to switch the switching valve to the second permissible state so that the main body portion of the pressing member is disposed at the lower position, and the upper rim is When mounted on the upper spindle, it is preferable to perform control to switch the switching valve to the blocking state with the upper rim removed from the upper spindle.
- the operation of the pressing member required for the tire test, the removal of the upper rim, and the mounting of the upper rim is automatically and reliably achieved by the switching valve controller of the controller.
- the downward pressing force that the spring body applies to the main body in a state where the upper rim is mounted on the upper spindle is derived from the magnetic force of the permanent magnet.
- the rim is set to be smaller than a value obtained by subtracting the weight of the upper rim having the maximum weight among the plurality of upper rims.
- the tire test is performed in a state where the upper rim is mounted on the upper spindle. Therefore, the downward pressing force that the spring body applies to the main body in this mounted state is smaller than the value obtained by subtracting the weight from the magnetic force, so that the upper rim can be held by the upper spindle.
- the rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the upper spindle, and the main body portion of the pressing member includes a lower member positioned below the support member.
- the spring body of the pressing member is disposed so as to be interposed between the support member and the lower member, and an upper end portion of the spring body is supported by the support member and a lower end portion of the spring body Is supported by the lower member, and the spring body allows the lower member to approach the support member by contracting, and the spring body has at least the main body portion and the upper position.
- You may comprise so that downward pressing force may be applied with respect to the said lower side member of the said main-body part with the elastic force of the said spring body, when located between lower positions. This aspect makes it possible to mitigate an impact when the upper surface of the upper rim contacts the lower surface of the upper spindle with a simple configuration in which the support member as described above is provided.
- the main body portion of the pressing member extends upward from the upper member to the lower member, and extends from the upper member to the lower member.
- a second spring body that is supported by the upper member, and a lower end of the second spring body is supported by the support member.
- the spring member is contracted so that the lower member becomes
- the first spring body is allowed to approach the lower member of the main body by the elastic force of the first spring body when the first spring body is contracted.
- the second spring body allows the upper member to approach the support member by contracting, and the second spring body is configured to apply the downward pressing force to the second spring body.
- an upward pressing force may be applied to the upper member of the main body portion by the elastic force of the second spring body.
- the first spring body is disposed on the lower side of the support member
- the second spring body is disposed on the upper side of the support member. And it becomes possible to raise the freedom degree when designing the elastic part containing the said 2nd spring body.
- the main body is positioned below the upper spindle in the state where the main body is in the lower position or the main body is further below the lower position.
- the upper rim to be moved is brought close to the upper spindle, and the upper surface of the upper rim is brought into contact with the pressing surface of the main body portion before the lower surface of the upper spindle.
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Abstract
A rim replacing mechanism (50) is provided with: a pressing member (62) that includes a spring body (63) and a body (62A) having a pressing surface (62S) for applying a downward pressing force to the upper surface (12S) of an upper rim (12a); and an actuator (61) that vertically displaces the body (62A) within a range including upper and lower positions. The lower position is a position at which the upper surface (12S) of the upper rim (12a) can be separated downward from the lower surface (9S) of the upper spindle (9a) by having the body (62A) move downward toward the lower position while the pressing surface (62S) of the body (62A) applies the downward pressing force to the upper surface (12S) of the upper rim (12a). The spring body (63) is configured to apply the downward pressing force to the body (62A) positioned at the lower position.
Description
本発明は、タイヤ試験機に備えられたリム交換機構及びリム交換方法に関する。
The present invention relates to a rim replacement mechanism and a rim replacement method provided in a tire testing machine.
従来、互いに異なる内周径またはトレッド面の幅を有する複数のタイヤの試験を実施することが可能なタイヤ試験機が知られている。このようなタイヤ試験機では、複数のタイヤのサイズにそれぞれ対応する複数のリムが用いられる。上記のようなタイヤ試験機では、スピンドルに対して、複数のリムのうち、試験対象のタイヤのサイズに適合するリムが取り付けられる。したがって、当該タイヤ試験機は、スピンドルに対してリムを取り付けること及び取り外すことが可能なリム交換機構を備える。
Conventionally, tire testing machines capable of testing a plurality of tires having mutually different inner diameters or tread surface widths are known. In such a tire testing machine, a plurality of rims respectively corresponding to a plurality of tire sizes are used. In the tire testing machine as described above, a rim suitable for the size of the tire to be tested is attached to the spindle among the plurality of rims. Therefore, the tire testing machine includes a rim exchange mechanism that can attach and remove a rim to the spindle.
例えば、特許文献1は、タイヤを挟持可能な上リム及び下リムと、これら上下の各リムをそれぞれの軸心を同軸にさせて保持する上スピンドル及び下スピンドルと、上スピンドルを軸心回りに回転自在に支持する上スピンドルハウジングと、この上スピンドルハウジングを保持する上部フレームと、を有するタイヤ検査装置を開示する。この特許文献1のタイヤ検査装置は、上スピンドルに永久磁石で固定された上リムを交換するリム交換機構を備えている。このタイヤ検査装置の上スピンドルには上リムを磁着する永久磁石が当該上スピンドルの軸心まわりに複数設けられており、上部フレームには上スピンドルから径外側に離れた上リムの表面を押圧して永久磁石により磁着された上リムを上スピンドルから引き離す離脱手段が設けられている。この離脱手段は、上部フレームに固定され、上スピンドルと一体に回転不能な構成とされている。
For example, Patent Document 1 discloses an upper rim and a lower rim capable of sandwiching a tire, an upper spindle and a lower spindle that hold the upper and lower rims with their respective axes coaxial, and an upper spindle about the axis. A tire inspection apparatus having an upper spindle housing that rotatably supports and an upper frame that holds the upper spindle housing is disclosed. The tire inspection apparatus disclosed in Patent Document 1 includes a rim replacement mechanism that replaces an upper rim fixed to the upper spindle with a permanent magnet. A plurality of permanent magnets that magnetize the upper rim are provided on the upper spindle of the tire inspection device around the axis of the upper spindle, and the upper frame presses the surface of the upper rim away from the upper spindle. Thus, there is provided a detaching means for pulling the upper rim magnetized by the permanent magnet away from the upper spindle. The detaching means is fixed to the upper frame and cannot be rotated integrally with the upper spindle.
特許文献1に開示されているように、従来のタイヤ試験機におけるリム交換機構は、磁石を組込んだ下スピンドルと、交換用のリムが載置されているリムテーブルと、をさらに有する。特許文献1のリム交換機構において、スピンドルに取り付けられているリムを取り外す手順は、以下の通りである。
As disclosed in Patent Document 1, the rim replacement mechanism in a conventional tire testing machine further includes a lower spindle incorporating a magnet and a rim table on which a replacement rim is placed. In the rim replacement mechanism of Patent Document 1, the procedure for removing the rim attached to the spindle is as follows.
まず、離脱手段により上リムが下方に押圧されて、上リムが上スピンドルから取り外され、下リムの上に上リムが配置される。その後、上下リムがセットになった状態(下リムの上に上リムが配置された状態)で下スピンドルが下降する。上下リムがセットになった状態で下リムがリムテーブルに当たると、上下リムが下スピンドルからリムテーブルに移載される。下スピンドルは、さらに下降し、リムテーブルよりも下方の下限位置で停止する。
First, the upper rim is pressed downward by the releasing means, the upper rim is removed from the upper spindle, and the upper rim is placed on the lower rim. Thereafter, the lower spindle is lowered in a state where the upper and lower rims are set (a state where the upper rim is disposed on the lower rim). When the lower rim hits the rim table with the upper and lower rims set, the upper and lower rims are transferred from the lower spindle to the rim table. The lower spindle further descends and stops at the lower limit position below the rim table.
一方、前記リム交換機構において、上下リムをそれぞれのスピンドルに取り付ける手順(装着手順)は、以下の通りである。まず、上述した下限位置から下スピンドルが上昇し、リムテーブル上に載置された上下リムが下スピンドルに移載される。
On the other hand, in the rim exchanging mechanism, the procedure (mounting procedure) for attaching the upper and lower rims to each spindle is as follows. First, the lower spindle rises from the lower limit position described above, and the upper and lower rims placed on the rim table are transferred to the lower spindle.
その後、下スピンドルがさらに上昇し、上下リムが上スピンドルに近づくと、上下リムのうち上リムが、上スピンドルに設けられた磁石の磁力により上スピンドルに吸着する。
After that, when the lower spindle further rises and the upper and lower rims approach the upper spindle, the upper rim of the upper and lower rims is attracted to the upper spindle by the magnetic force of the magnet provided on the upper spindle.
上述したリムの交換が行われる場合、特に上リムが上スピンドルに装着される場合には、以下に述べる課題が生じる。
When the above-described rim replacement is performed, particularly when the upper rim is mounted on the upper spindle, the following problems occur.
すなわち、上下リムのセットが上スピンドルに向かって上昇し、上リムが上スピンドルに装着される過程において、上リムは磁石の磁力(吸着力)により急速に上スピンドルに引き寄せられる。このため、上リムは上スピンドルに対して勢いよく接触する。この接触時の衝撃力は非常に大きいため、この衝撃により上リムと上スピンドルとの接触面(密着面)が傷みやすいという課題がある。また、上リムが上スピンドルに対して接触する時(磁着時)には大きな衝撃音が発生し、作業環境を悪化させる虞もある。
That is, in the process in which the set of the upper and lower rims rises toward the upper spindle and the upper rim is mounted on the upper spindle, the upper rim is rapidly attracted to the upper spindle by the magnetic force (adsorption force) of the magnet. For this reason, the upper rim contacts the upper spindle vigorously. Since the impact force at the time of contact is very large, there is a problem that the contact surface (contact surface) between the upper rim and the upper spindle is easily damaged by this impact. Further, when the upper rim comes into contact with the upper spindle (at the time of magnetic attachment), a large impact sound is generated, which may deteriorate the working environment.
本発明は、上スピンドルに対して上リムを装着する際に前記上リムが前記上スピンドルに接触するときの衝撃を緩和することが可能なタイヤ試験機のリム交換機構及びリム交換方法を提供することを目的とする。
The present invention provides a rim exchanging mechanism and a rim exchanging method for a tire testing machine capable of alleviating an impact when the upper rim contacts the upper spindle when the upper rim is mounted on the upper spindle. For the purpose.
提供されるのは、タイヤを挟持するための上リム及び下リムと、前記上リムが装着されること及び取り外されることが可能な上スピンドルであって当該上スピンドルに装着された前記上リムの上面に接する下面を有するとともに前記上スピンドルに装着された前記上リムを磁力により当該上スピンドルに固定するための永久磁石を有する上スピンドルと、前記下リムが装着される下スピンドルと、を備えたタイヤ試験機に設けられ、前記上スピンドルに固定された前記上リムを交換するためのリム交換機構である。当該リム交換機構は、前記上リムの前記上面に対して下向きの押圧力を加えるための押圧面を有する本体部とばね体とを含む押圧部材と、前記本体部を上方位置と下方位置とを含む範囲において上下方向に変位させるアクチュエータと、を備える。前記上方位置は、前記上スピンドルに装着された前記上リムの前記上面よりも前記本体部の前記押圧面が上方に位置する位置である。前記下方位置は、前記上方位置よりも下方の位置である。前記下方位置は、前記本体部の前記押圧面が前記上リムの前記上面に対して前記下向きの押圧力を加えながら前記本体部が当該下方位置に向かって下方に移動することにより前記上リムの前記上面を前記上スピンドルの前記下面から下方に離すことを可能にする位置である。前記ばね体は、前記下方位置に配置される前記本体部に対して下向きの押圧力を加えるように構成されている。
Provided are an upper rim and a lower rim for sandwiching a tire, and an upper spindle to which the upper rim can be attached and detached, the upper rim being attached to the upper spindle. An upper spindle having a lower surface in contact with the upper surface and having a permanent magnet for fixing the upper rim mounted on the upper spindle to the upper spindle by a magnetic force; and a lower spindle on which the lower rim is mounted A rim exchanging mechanism for exchanging the upper rim, which is provided in a tire testing machine and is fixed to the upper spindle. The rim replacement mechanism includes a pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body, and the main body portion in an upper position and a lower position. And an actuator that is displaced in the vertical direction within a range to include. The upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle. The lower position is a position below the upper position. The lower position is determined by moving the main body portion downward toward the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim. It is a position that allows the upper surface to be separated downward from the lower surface of the upper spindle. The spring body is configured to apply a downward pressing force to the main body disposed at the lower position.
以下、本発明の実施形態を、図面を参照して説明する。以下に説明する実施形態は、本発明を具体化した一例であって、本発明はその具体例に限定されるものではない。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Embodiment described below is an example which actualized this invention, Comprising: This invention is not limited to the specific example.
図1~図4は、前記実施形態に係るリム交換機構を備えるタイヤ試験機1を示す。以降のタイヤ試験機1の説明において、タイヤTの搬送方向についての当該タイヤTの搬送経路Fの長さがタイヤ試験機1の全長に相当する。前記搬送経路Fに対して交差する水平方向、より正確には当該搬送経路Fに対して略直交する水平方向がタイヤ試験機1の奥行き方向に相当する。当該奥行き方向はタイヤ試験機1の左右方向又は幅方向とも称される。
1 to 4 show a tire testing machine 1 including a rim replacement mechanism according to the embodiment. In the following description of the tire testing machine 1, the length of the conveyance path F of the tire T in the conveyance direction of the tire T corresponds to the entire length of the tire testing machine 1. The horizontal direction intersecting with the conveyance path F, more precisely, the horizontal direction substantially orthogonal to the conveyance path F corresponds to the depth direction of the tire testing machine 1. The depth direction is also referred to as the left-right direction or the width direction of the tire testing machine 1.
前記タイヤ試験機1は、ルブリケーション部2と、タイヤ試験部3と、マーキング部4と、を備える。前記ルブリケーション部2は、前記タイヤTを回転させつつ当該タイヤTのビード部Bにルブリケーション液を塗布する。前記タイヤ試験部3は、前記ルブリケーション部2でルブリケーション液が塗布されたタイヤTをスピンドルユニット9において回転させつつタイヤ試験を行ってタイヤTに存在する特異点を検出する。前記マーキング部4は、前記タイヤTにおいて前記特異点が存在するタイヤTの周方向の位置にマーキングを施す。
The tire testing machine 1 includes a lubrication unit 2, a tire testing unit 3, and a marking unit 4. The lubrication part 2 applies lubrication liquid to the bead part B of the tire T while rotating the tire T. The tire test unit 3 detects a singular point existing in the tire T by performing a tire test while rotating the tire T coated with the lubrication liquid in the lubrication unit 2 in the spindle unit 9. The marking unit 4 marks the tire T at a position in the circumferential direction of the tire T where the singular point exists.
前記ルブリケーション部2、前記タイヤ試験部3及び前記マーキング部4は、前記搬送経路Fに沿って上流側から下流側に向かってその順番に並んでいる。
The lubrication part 2, the tire test part 3 and the marking part 4 are arranged in that order along the transport path F from the upstream side toward the downstream side.
前記ルブリケーション部2は、搬入されたタイヤTのビード部Bに対してルブリケーション液を塗布する部分である。前記ルブリケーション部2は、タイヤTが水平に寝た姿勢で当該タイヤTを搬送する左右一対の第1コンベア5と、前記一対の第1コンベア5により搬入されたタイヤTを狭持する左右一対のアーム部6と、前記一対のアーム部6により保持されたタイヤTのビード部B(内周縁)に、ルブリケーション液を塗布する塗布部7と、を有する。
The lubrication part 2 is a part for applying lubrication liquid to the bead part B of the tire T carried in. The lubrication unit 2 includes a pair of left and right first conveyors 5 that conveys the tire T in a posture in which the tire T lies horizontally, and a pair of left and right tires that are carried by the pair of first conveyors 5. And an application part 7 for applying a lubrication liquid to the bead part B (inner peripheral edge) of the tire T held by the pair of arm parts 6.
なお、この実施形態において、前記一対の第1コンベア5のそれぞれは、無限軌道を形成するループ状の帯体である搬送ベルトを有するベルトコンベアであるが、第1コンベア5はベルトコンベア方式に限定されるものではない。
In this embodiment, each of the pair of first conveyors 5 is a belt conveyor having a conveyor belt that is a loop-shaped belt forming an endless track, but the first conveyor 5 is limited to a belt conveyor system. Is not to be done.
前記一対のアーム部6のそれぞれの先端には回転ローラ8が回転可能に設けられている。ルブリケーション部2では、当該一対のアーム部6は、搬送されてきたタイヤTを左右両外側から挟み込んで、前記回転ローラ8を前記タイヤTの外周面であるトレッド面に接触させる。前記回転ローラ8は、前記タイヤTが上下方向を向く軸心回りに回転することを許容するように回転する。前記塗布部7は、上下方向に移動可能に構成されている。前記塗布部7は、ブラシ状をなし、前記一対のアーム部6に保持されている前記タイヤTのビード部Bに接触する位置まで上昇して当該ビード部Bにルブリケーション液を塗布する。当該塗布部7は、塗布後に第1コンベア5の下方の位置に戻されて格納される。
Rotating rollers 8 are rotatably provided at the respective tips of the pair of arm portions 6. In the lubrication unit 2, the pair of arm units 6 sandwich the conveyed tire T from the left and right outer sides and bring the rotating roller 8 into contact with a tread surface that is an outer peripheral surface of the tire T. The rotating roller 8 rotates so as to allow the tire T to rotate around an axis that faces in the vertical direction. The application unit 7 is configured to be movable in the vertical direction. The application part 7 has a brush shape and rises to a position where it comes into contact with the bead part B of the tire T held by the pair of arm parts 6 to apply the lubrication liquid to the bead part B. The application unit 7 is returned to the position below the first conveyor 5 after application and stored.
前記一対の第1コンベア5は、前記ルブリケーション液の塗布が施されたタイヤTを前記ルブリケーション部2から前記タイヤ試験部3へ搬送する。
The pair of first conveyors 5 conveys the tire T to which the lubrication liquid has been applied from the lubrication unit 2 to the tire test unit 3.
前記タイヤ試験部3は、スピンドルユニット9と、ドラム10と、左右一対の第2コンベア11と、リムテーブル13と、を有する。
The tire test unit 3 includes a spindle unit 9, a drum 10, a pair of left and right second conveyors 11, and a rim table 13.
前記スピンドルユニット9は、前記タイヤTが上下方向を向く軸心回りに回転するのを許容するように当該タイヤTを保持する。前記ドラム10は、上下方向を向く中心軸をもつ円筒状の外周面を有するとともに前記中心軸回りに回転可能となるように前記スピンドルユニット9の側方に配置される。
The spindle unit 9 holds the tire T so as to allow the tire T to rotate about an axis that is directed in the vertical direction. The drum 10 has a cylindrical outer peripheral surface having a central axis facing in the vertical direction, and is disposed on the side of the spindle unit 9 so as to be rotatable around the central axis.
前記一対の第2のコンベア11は、前記ルブリケーション部2から搬送されてきたタイヤTを当該タイヤTが水平に寝た姿勢のまま搬送する。前記リムテーブル13は、その上に複数のリム12が搭載されることが可能な水平なリム搭載面を有する。
The pair of second conveyors 11 conveys the tire T conveyed from the lubrication unit 2 with the tire T lying down horizontally. The rim table 13 has a horizontal rim mounting surface on which a plurality of rims 12 can be mounted.
この実施形態において、前記一対の第2コンベア11のそれぞれは、上流側コンベア11aと、前記搬送方向について前記上流側コンベア11aの下流側に配置された下流側コンベア11bとにより構成される。当該上流側及び下流側コンベア11a,11bのそれぞれは、無限軌道を形成するループ状の帯体である搬送ベルトを有するベルトコンベアである。
In this embodiment, each of the pair of second conveyors 11 includes an upstream conveyor 11a and a downstream conveyor 11b disposed on the downstream side of the upstream conveyor 11a in the transport direction. Each of the upstream and downstream conveyors 11a and 11b is a belt conveyor having a conveyor belt that is a loop-shaped belt that forms an endless track.
前記タイヤ試験部3は、スピンドルユニット9を回転駆動する図略の回転駆動部をさらに有する。
The tire test unit 3 further includes a rotation drive unit (not shown) that drives the spindle unit 9 to rotate.
スピンドルユニット9は、上スピンドル9aと下スピンドル9bとを有する。当該上スピンドル9a及び当該下スピンドル9bは上下方向を向く共通の軸心回りに回転可能な棒状の部材である。
The spindle unit 9 has an upper spindle 9a and a lower spindle 9b. The upper spindle 9a and the lower spindle 9b are rod-like members that can rotate around a common axis that faces in the vertical direction.
前記複数のリム12のそれぞれは、前記上スピンドル9aの下端部に取付けられる上リム12aと、前記下スピンドル9bの上端部に取付けられる下リム12bと、により構成される。当該上リム12a及び当該下リム12bは前記一対の第2コンベア11上のタイヤTを上下方向に挟み込むことが可能となるように配置されている。各リム12は、上リム12aと、下リム12bとに2分割された構造を有する。
Each of the plurality of rims 12 includes an upper rim 12a attached to the lower end portion of the upper spindle 9a and a lower rim 12b attached to the upper end portion of the lower spindle 9b. The upper rim 12a and the lower rim 12b are arranged so that the tire T on the pair of second conveyors 11 can be sandwiched in the vertical direction. Each rim 12 has a structure that is divided into an upper rim 12a and a lower rim 12b.
なお、スピンドルユニット9の構成の詳細は、後述する。
Details of the configuration of the spindle unit 9 will be described later.
前記ドラム10は、前記スピンドルユニット9に保持されたタイヤTのトレッド面に対して前記ドラム10の外周面が当該タイヤTの径方向に接離することが可能となるように、スピンドルユニット9の近傍に配置されている。前記ドラム10の外周面がスピンドルユニット9に保持されたタイヤTのトレッド面に接触した状態で当該タイヤTを所定の回転数で回転させることにより、当該タイヤTの試験が行われる。このドラム10は回転軸を有し、当該回転軸には、回転中のタイヤTからドラム10に加わる力やモーメントなどを計測する図略のロードセルが取り付けられている。
The drum 10 is arranged so that the outer peripheral surface of the drum 10 can come into contact with and separate from the tread surface of the tire T held by the spindle unit 9 in the radial direction of the tire T. It is arranged in the vicinity. The test of the tire T is performed by rotating the tire T at a predetermined rotation speed in a state where the outer peripheral surface of the drum 10 is in contact with the tread surface of the tire T held by the spindle unit 9. The drum 10 has a rotating shaft, and a load cell (not shown) for measuring a force or moment applied to the drum 10 from the rotating tire T is attached to the rotating shaft.
前記ロードセルで計測された結果に基づき、タイヤユニフォミティなどが計算され、タイヤTの反発力が最も大きくなる周方向位置や軸方向位置などが「特異点」として計測される。前記タイヤ試験部3で行われるタイヤ試験は、上記したタイヤユニフォミティの測定だけでなく、外形形状の計測なども含む。「特異点」が計測されたタイヤTは、タイヤ試験部3で所定の角度だけ回転させられた後、当該タイヤ試験部3から前記マーキング部4に送られる。
The tire uniformity is calculated based on the result measured by the load cell, and the circumferential position and the axial position where the repulsive force of the tire T is maximized are measured as “singular points”. The tire test performed in the tire test unit 3 includes not only the measurement of the tire uniformity described above but also the measurement of the outer shape. The tire T on which the “singularity” is measured is rotated by a predetermined angle by the tire test unit 3 and then sent from the tire test unit 3 to the marking unit 4.
前記マーキング部4は、左右一対の第3コンベア14と、刻印装置15と、を有する。前記一対の第3コンベア14は、タイヤTが水平に寝た姿勢のまま当該タイヤTを前記搬送方向に移動させる。前記刻印装置15は、前記一対の第3コンベア14上に位置決めされたタイヤTの所定位置(例えばタイヤTの内周側の所定位置)に対してマーキングを施す。この実施形態において、前記一対の第3コンベア14のそれぞれは、無限軌道を形成するループ状の帯体である搬送ベルトを有するベルトコンベアである。
The marking unit 4 includes a pair of left and right third conveyors 14 and a marking device 15. The pair of third conveyors 14 moves the tire T in the transport direction while keeping the tire T lying horizontally. The marking device 15 performs marking on a predetermined position of the tire T positioned on the pair of third conveyors 14 (for example, a predetermined position on the inner peripheral side of the tire T). In this embodiment, each of the pair of third conveyors 14 is a belt conveyor having a conveyor belt that is a loop-shaped belt that forms an endless track.
例えば、タイヤ試験部3でタイヤTのタイヤユニフォミティについてのタイヤ試験が行われている場合、前記刻印装置15は、前記タイヤ試験で特定された「特異点」を示すユニフォミティマークなどのマークを、前記タイヤユニフォミティに特異性があるタイヤTの周方向位置に与える。外形形状の計測などについてのタイヤ試験が行われている場合には、前記ユニフォミティマーク以外のマークがタイヤTに与えられてもよい。
For example, when a tire test is performed on the tire uniformity of the tire T in the tire test unit 3, the marking device 15 uses a mark such as a uniformity mark indicating the “singularity” identified in the tire test, The tire uniformity is given to the circumferential direction position of the tire T having specificity. When a tire test for measuring the outer shape or the like is performed, a mark other than the uniformity mark may be given to the tire T.
前記タイヤ試験部3は、スライド機構22をさらに有する。当該スライド機構22は、前記一対の第2コンベア11における前記一対の上流側コンベア11aを左右方向に沿って互いに接離する向きに移動させることにより当該一対の上流側コンベア11a同士の左右方向の間隔を変更する間隔変更機構である。前記スライド機構22は、前記接離する向きに当該一対の上流側コンベア11aをスライドさせることが可能である。
The tire test unit 3 further includes a slide mechanism 22. The slide mechanism 22 moves the pair of upstream conveyors 11a in the pair of second conveyors 11 in the left-right direction so as to contact and separate from each other along the left-right direction. This is an interval changing mechanism for changing. The slide mechanism 22 is capable of sliding the pair of upstream conveyors 11a in the approaching / separating direction.
当該一対の上流側コンベア11aが互いに接離する方向のスライドは、試験対象のタイヤTのサイズが変更された際に、その変更されたサイズに対応するリム12を前記第2コンベア11の下方に位置する前記リムテーブル13から取り出すことを可能にする。このタイヤ試験機1では、前記一対の上流側コンベア11aの間隔をリムの外周径に応じて変更することが可能である。
When the size of the test target tire T is changed, the slide in the direction in which the pair of upstream conveyors 11a come in contact with and away from each other moves the rim 12 corresponding to the changed size below the second conveyor 11. It is possible to remove from the rim table 13 located. In the tire testing machine 1, the distance between the pair of upstream conveyors 11a can be changed according to the outer diameter of the rim.
前記リムテーブル13は、円盤状の板材からなり、下方に退避した状態の下スピンドル9bの上端よりも上方に配置されている。前記タイヤ試験部3は、回転駆動機構18をさらに含む。当該回転駆動機構18は、前記リムテーブル13が上下方向を向く軸心回りに回転自在となるように当該リムテーブル13を支持するとともに、当該リムテーブル13を回転させることが可能である。つまり、本実施形態では、リムテーブル13はロータリテーブルである。
The rim table 13 is made of a disk-shaped plate material and is disposed above the upper end of the lower spindle 9b in a state of being retracted downward. The tire test unit 3 further includes a rotation drive mechanism 18. The rotation drive mechanism 18 can support the rim table 13 and rotate the rim table 13 so that the rim table 13 can rotate about an axis that is directed in the vertical direction. That is, in this embodiment, the rim table 13 is a rotary table.
前記リムテーブル13の前記リム搭載面の上には、互いに異なるサイズを有する前記複数のリム12が載置されることが可能である。前記複数のリム12は、前記リムテーブル13の回転周方向に並ぶ複数の位置のそれぞれにおいて載置されることが可能である。当該リムテーブル13に搭載された複数のリム12のそれぞれを構成する前記上リム12a及び前記下リム12bは上下に積層された状態で前記リム搭載面上に搭載され、前記上スピンドル9a及び前記下スピンドル9bにそれぞれ取付けられることが可能である。
The plurality of rims 12 having different sizes can be placed on the rim mounting surface of the rim table 13. The plurality of rims 12 can be placed at each of a plurality of positions aligned in the rotational circumferential direction of the rim table 13. The upper rim 12a and the lower rim 12b constituting each of the plurality of rims 12 mounted on the rim table 13 are mounted on the rim mounting surface in a state where they are stacked vertically, and the upper spindle 9a and the lower rim 12b are stacked. Each can be attached to a spindle 9b.
本実施形態では、前記リムテーブル13は、そのリム搭載面上において回転周方向に並ぶ4つの位置に対して、互いに異なるサイズを有する4つのリム12を搭載することが可能である。前記リムテーブル13は、当該リムテーブル13の回転中心軸が前記搬送方向について前記スピンドルユニット9よりも搬出側(出口側)に位置するように、配置されている。
In this embodiment, the rim table 13 can be mounted with four rims 12 having different sizes from each other at four positions aligned in the rotational circumferential direction on the rim mounting surface. The rim table 13 is arranged so that the rotation center axis of the rim table 13 is located on the carry-out side (exit side) of the spindle unit 9 in the transport direction.
前記タイヤ試験部3は、自動リムチェンジ機能を備える。当該自動リムチェンジ機能は、当該タイヤ試験部3に互いに異なる内周径やトレッド面の幅を有する様々なサイズのタイヤTが搬入されても、搬入されたタイヤTのサイズに合致したサイズを有するリム12に自動で交換し、タイヤTのタイヤ試験を停滞なく継続することを可能にする。
The tire test section 3 has an automatic rim change function. The automatic rim change function has a size that matches the size of the loaded tire T even if tires T of various sizes having different inner peripheral diameters and different tread surface widths are loaded into the tire test section 3. The rim 12 is automatically replaced, and the tire test of the tire T can be continued without stagnation.
具体的に、前記自動リムチェンジ機能は、上流のルブリケーション部2から搬入される次のタイヤTのサイズなどの情報に基づいて、前記スピンドルユニット9に取付けられているリム12を自動的にそのタイヤTのサイズなどに対応するリム12に変更することで、様々なサイズのタイヤTのタイヤ試験に対応することを可能にする機能である。
Specifically, the automatic rim change function automatically changes the rim 12 attached to the spindle unit 9 based on information such as the size of the next tire T carried in from the upstream lubrication unit 2. By changing to the rim 12 corresponding to the size of the tire T, etc., it is a function that makes it possible to cope with tire tests of tires T of various sizes.
図5~図7に示す本実施形態では、スピンドルユニット9、具体的には上スピンドル9aにおいて上リム12aを交換するための従来にはない構成を備えたリム交換機構50(詳しくはリム離脱機構51)が設けられている。以下、その詳細を説明する。
In the present embodiment shown in FIGS. 5 to 7, a rim exchanging mechanism 50 (specifically, a rim detaching mechanism) having an unconventional configuration for exchanging the upper rim 12a in the spindle unit 9, specifically, the upper spindle 9a. 51). Details will be described below.
図2及び図3に示すように、本実施形態に係るタイヤ試験機1は、フレーム52と、ハウジング53と、を備える。当該フレーム52の一部は、試験対象のタイヤTを水平な姿勢のまま搬送する上流側コンベア11aの上方に配置されている。当該フレーム52の一部は、前記上流側コンベア11aの上方において当該上流側コンベア11aに跨がるように設けられている。
As shown in FIGS. 2 and 3, the tire testing machine 1 according to the present embodiment includes a frame 52 and a housing 53. A part of the frame 52 is arranged above the upstream conveyor 11a that conveys the tire T to be tested in a horizontal posture. A part of the frame 52 is provided above the upstream conveyor 11a so as to straddle the upstream conveyor 11a.
前記フレーム52は、上スピンドル9aを回転自在に支持する上部フレーム52aと、上部フレーム52aを支持する下部フレーム52bと、を備えている。この上スピンドル9aの下方には下スピンドル9bが設けられている。前記ハウジング53は、下部フレーム52bに設けられ、下スピンドル9bを回転自在に支持する。
The frame 52 includes an upper frame 52a that rotatably supports the upper spindle 9a, and a lower frame 52b that supports the upper frame 52a. A lower spindle 9b is provided below the upper spindle 9a. The housing 53 is provided on the lower frame 52b and rotatably supports the lower spindle 9b.
上スピンドル9aは、係合部を有する。当該係合部は、前記上スピンドル9aの下端面に設けられ、当該下端面から上方に凹む凹部を有する。この係合部に下スピンドル9bの上端が嵌合されることで上下スピンドル9a、9bが連結されて1本の棒のように繋がる。
The upper spindle 9a has an engaging portion. The engaging portion is provided on the lower end surface of the upper spindle 9a and has a concave portion that is recessed upward from the lower end surface. By fitting the upper end of the lower spindle 9b to this engaging portion, the upper and lower spindles 9a, 9b are connected and connected like a single bar.
また、図5に示すように、上スピンドル9aは、スピンドル本体と、フランジ部55と、を有する。当該スピンドル本体は、上スピンドル9aの回転中心軸を中心として上下方向に延びる円柱形状の部分であり、前記フランジ部55は、当該スピンドル本体の外周面から径方向外側に円環状に広がる部分である。当該フランジ部55は、前記スピンドル本体の下端部に設けられている。当該フランジ部55は、前記スピンドル本体の下端部の外周面から径方向外側に張り出す形状を有する。前記上スピンドル9aのうち前記フランジ部55より下側の部分は、前記係合部が設けられた部分である。
Further, as shown in FIG. 5, the upper spindle 9 a has a spindle body and a flange portion 55. The spindle body is a cylindrical portion extending in the vertical direction around the rotation center axis of the upper spindle 9a, and the flange portion 55 is a portion that extends in an annular shape radially outward from the outer peripheral surface of the spindle body. . The flange portion 55 is provided at the lower end portion of the spindle body. The flange portion 55 has a shape projecting radially outward from the outer peripheral surface of the lower end portion of the spindle body. A portion of the upper spindle 9a below the flange portion 55 is a portion where the engaging portion is provided.
前記上スピンドル9aは下面9Sを有し、前記上リム12aは上面12Sを有する。前記上リム12aの上面12Sは、当該上リム12aが前記上スピンドル9aに装着された状態で前記上スピンドル9aの下面9Sに接する面である。言い換えると、前記上スピンドル9aの下面9Sは、前記上リム12aの上面12Sに対して上下方向に対向する面である。
The upper spindle 9a has a lower surface 9S, and the upper rim 12a has an upper surface 12S. The upper surface 12S of the upper rim 12a is a surface that contacts the lower surface 9S of the upper spindle 9a in a state where the upper rim 12a is mounted on the upper spindle 9a. In other words, the lower surface 9S of the upper spindle 9a is a surface facing the upper surface 12S of the upper rim 12a in the vertical direction.
本実施形態では、前記上スピンドル9aの前記下面9Sは、前記フランジ部55の下面により構成される。具体的には、当該下面9Sは、底面視において前記上スピンドル9aの回転中心軸を中心とする環状の面により構成される。当該環状の面は、底面視において、前記回転中心軸を中心とする互いに径の異なる2つの同心円により囲まれる領域により構成される面である。本実施形態では、前記上スピンドル9aのフランジ部55の下面9Sは平面であり、より具体的には、当該上スピンドル9aの回転中心軸に直交する平面である。ただし、前記下面9Sは平面に限られず、曲面を含むものであってもよい。また、前記下面9Sは、前記上スピンドル9aのうち前記フランジ部55以外の部分に形成された面であってもよい。前記上スピンドル9aの前記下面9Sは、当該上スピンドル9aの表面のうち最下部に位置する面でなくてもよい。前記上スピンドル9aの前記下面9Sは、下方に向いた面であって前記上リム12aの前記上面12Sに対して上下方向に対向する面であればよい。
In the present embodiment, the lower surface 9S of the upper spindle 9a is constituted by the lower surface of the flange portion 55. Specifically, the lower surface 9S is configured by an annular surface centered on the rotation center axis of the upper spindle 9a in the bottom view. The annular surface is a surface configured by a region surrounded by two concentric circles having different diameters around the rotation center axis in the bottom view. In the present embodiment, the lower surface 9S of the flange portion 55 of the upper spindle 9a is a plane, more specifically, a plane orthogonal to the rotation center axis of the upper spindle 9a. However, the lower surface 9S is not limited to a flat surface, and may include a curved surface. Further, the lower surface 9S may be a surface formed in a portion other than the flange portion 55 of the upper spindle 9a. The lower surface 9S of the upper spindle 9a does not have to be a lowermost surface among the surfaces of the upper spindle 9a. The lower surface 9S of the upper spindle 9a may be a surface that faces downward and faces the upper surface 12S of the upper rim 12a in the vertical direction.
前記上リム12aの前記上面12Sは、平面視において当該上リム12aの回転中心軸を中心とする環状の面により構成される。当該環状の面は、平面視において、前記上リム12aの回転中心軸を中心とする互いに径の異なる2つの同心円により囲まれる領域により構成される面である。本実施形態では、前記上リム12aの上面12Sは平面であり、より具体的には、当該上リム12aの回転中心軸に直交する平面である。ただし、前記上面12Sは平面に限られず、曲面を含むものであってもよい。前記上リム12aの前記上面12Sは、当該上リム12aの表面のうち最上部に位置する面でなくてもよい。前記上リム12aの前記上面12Sは、上方に向いた面であって前記上スピンドル9aの前記下面9Sに対して上下方向に対向する面であればよい。
The upper surface 12S of the upper rim 12a is configured by an annular surface centering on the rotation center axis of the upper rim 12a in plan view. The annular surface is a surface constituted by a region surrounded by two concentric circles having different diameters around the rotation center axis of the upper rim 12a in plan view. In the present embodiment, the upper surface 12S of the upper rim 12a is a plane, more specifically, a plane orthogonal to the rotation center axis of the upper rim 12a. However, the upper surface 12S is not limited to a flat surface, and may include a curved surface. The upper surface 12S of the upper rim 12a may not be the uppermost surface of the surface of the upper rim 12a. The upper surface 12S of the upper rim 12a may be a surface that faces upward and faces the lower surface 9S of the upper spindle 9a in the vertical direction.
前記上リム12aの前記上面12Sは、後述する押圧部材62の押圧面62Sに対して上下方向に対向する面であり、当該押圧面62Sにより下向きの押圧力を受ける面である。また、当該上面12Sは、上リム12aが上スピンドル9aに装着されたときに上スピンドル9aの下面9Sに接する面である。本実施形態では、前記上リム12aの前記上面12Sのうち、前記押圧面62Sが接する部分と、前記下面9Sが接する部分とは、同じ高さであるが、これに限られず、異なる高さであってもよい。
The upper surface 12S of the upper rim 12a is a surface that faces the pressing surface 62S of the pressing member 62, which will be described later, in the vertical direction, and receives a downward pressing force by the pressing surface 62S. The upper surface 12S is a surface that contacts the lower surface 9S of the upper spindle 9a when the upper rim 12a is mounted on the upper spindle 9a. In the present embodiment, the portion of the upper surface 12S of the upper rim 12a that is in contact with the pressing surface 62S and the portion of the upper rim 12a that is in contact with the lower surface 9S have the same height, but the present invention is not limited to this. There may be.
前記フランジ部55は、少なくとも1つの装着部71を有する。本実施形態では、フランジ部55は複数の装着部71を有する。各装着部71は、前記フランジ部55の下面9Sから上方に向かって窪む凹部により構成される。前記複数の装着部71は、前記下面9Sに周方向に間隔をおいて並んでいる。
The flange portion 55 has at least one mounting portion 71. In the present embodiment, the flange portion 55 has a plurality of mounting portions 71. Each mounting portion 71 is constituted by a concave portion that is recessed upward from the lower surface 9S of the flange portion 55. The plurality of mounting portions 71 are arranged on the lower surface 9S at intervals in the circumferential direction.
前記上スピンドル9aは複数の永久磁石56を有する。当該複数の永久磁石56は、上スピンドル9aの回転中心軸回りに周方向に間隔をおいて配置されている。当該複数の永久磁石56は、これらの磁力により上リム12aを上スピンドル9aに固定する(磁着する)機能を有する。上リム12aは、永久磁石56につく材質により形成されている。
The upper spindle 9a has a plurality of permanent magnets 56. The plurality of permanent magnets 56 are arranged at intervals in the circumferential direction around the rotation center axis of the upper spindle 9a. The plurality of permanent magnets 56 have a function of fixing (magnetizing) the upper rim 12a to the upper spindle 9a by these magnetic forces. The upper rim 12 a is formed of a material attached to the permanent magnet 56.
前記複数の永久磁石56は、上スピンドル9aのフランジ部55の下面9Sに形成された前記複数の装着部71に収容されている。これらの永久磁石56は、下方にそれぞれ開口するとともに天井面をそれぞれ有する複数の装着部71に収容されている。前記複数の永久磁石56は、上スピンドル9aのフランジ部55の下面9Sよりも下方に強い磁力を発生している。このことは、上リム12aが上スピンドル9aに磁着されること、具体的には、上スピンドル9aのフランジ部55の下面9Sに磁着されることを可能にする。
The plurality of permanent magnets 56 are accommodated in the plurality of mounting portions 71 formed on the lower surface 9S of the flange portion 55 of the upper spindle 9a. These permanent magnets 56 are accommodated in a plurality of mounting portions 71 that respectively open downward and have ceiling surfaces. The plurality of permanent magnets 56 generate a strong magnetic force below the lower surface 9S of the flange portion 55 of the upper spindle 9a. This enables the upper rim 12a to be magnetically attached to the upper spindle 9a, specifically, to be magnetically attached to the lower surface 9S of the flange portion 55 of the upper spindle 9a.
下スピンドル9bはハウジング53に対して回転可能に取り付けられている。タイヤ試験機1は、昇降シリンダ72をさらに備える。当該昇降シリンダ72は、ハウジング53から下方に延びるように設けられている。当該昇降シリンダ72は、下スピンドル9bを上下方向に昇降させることができる。
The lower spindle 9 b is rotatably attached to the housing 53. The tire testing machine 1 further includes a lifting cylinder 72. The lifting cylinder 72 is provided so as to extend downward from the housing 53. The elevating cylinder 72 can elevate and lower the lower spindle 9b in the vertical direction.
下スピンドル9bの上端部は上方に向かうにつれて細くなるテーパ状に形成されている。当該下スピンドル9bの前記上端部は、上スピンドル9aの前記係合部に係合可能である。また、下スピンドル9bは、前記テーパ状に形成された部分の下側に、上スピンドル9aと同様なフランジ部を有する。このフランジ部の上面には、図略の永久磁石が複数装着されている。
The upper end of the lower spindle 9b is formed in a tapered shape that becomes thinner as it goes upward. The upper end portion of the lower spindle 9b can be engaged with the engaging portion of the upper spindle 9a. The lower spindle 9b has a flange portion similar to the upper spindle 9a on the lower side of the tapered portion. A plurality of unillustrated permanent magnets are mounted on the upper surface of the flange portion.
リム交換機構50では、上下リム12a、12bの装着の際には、下スピンドル9bの前記永久磁石の磁力により下リム12bが下スピンドル9bに固定される。当該下リム12bの上には前記上リム12aが積層された状態で配置されている。次に、昇降シリンダ72を用いて下スピンドル9bが上方に伸ばされ(下スピンドル9bが上方に変位し)、上スピンドル9aのフランジ部55に設けられた上側の永久磁石56の磁力により上リム12aが上スピンドル9aに固定される。
In the rim exchanging mechanism 50, when the upper and lower rims 12a and 12b are mounted, the lower rim 12b is fixed to the lower spindle 9b by the magnetic force of the permanent magnet of the lower spindle 9b. The upper rim 12a is disposed in a stacked state on the lower rim 12b. Next, the lower spindle 9b is extended upward using the lifting cylinder 72 (the lower spindle 9b is displaced upward), and the upper rim 12a is generated by the magnetic force of the upper permanent magnet 56 provided on the flange portion 55 of the upper spindle 9a. Is fixed to the upper spindle 9a.
一方、下リム12bを下スピンドル9bから取り外す際には、昇降シリンダ72を用いて下スピンドル9bが下方に変位することにより下リム12bがリムテーブル13の上面に載置される。リムテーブル13は、これに載置された下リム12bが下方に移動することを規制する。したがって、下スピンドル9bがさらに下方に移動することにより下リム12bは下スピンドル9bから取り外されて前記リムテーブル13上に配置される。
On the other hand, when the lower rim 12b is detached from the lower spindle 9b, the lower rim 12b is placed on the upper surface of the rim table 13 by the lower spindle 9b being displaced downward using the elevating cylinder 72. The rim table 13 restricts the lower rim 12b mounted thereon from moving downward. Accordingly, when the lower spindle 9b moves further downward, the lower rim 12b is removed from the lower spindle 9b and placed on the rim table 13.
ところで、タイヤ試験機1では、上スピンドル9aは上下に移動しないようにフレーム52に固定されている。このため、上リム12aを上スピンドル9aから取り外す方法(離脱方法)は、下リム12bに係る上述の離脱方法とは異なる。
By the way, in the tire testing machine 1, the upper spindle 9a is fixed to the frame 52 so as not to move up and down. For this reason, the method (detachment method) of removing the upper rim 12a from the upper spindle 9a is different from the above-described disconnection method related to the lower rim 12b.
具体的には、本実施形態に係るリム交換機構50は、永久磁石56により上スピンドル9aに固定された上リム12aを上スピンドル9aから強制的に引き離すリム離脱機構51を備える。このリム離脱機構51は、前記上リム12aの上面12Sのうち上スピンドル9aから径方向外側に離れた部分を下方へ押圧するための構成を備える。以下、リム離脱機構51について具体的に説明する。
Specifically, the rim replacement mechanism 50 according to this embodiment includes a rim detachment mechanism 51 that forcibly separates the upper rim 12a fixed to the upper spindle 9a by the permanent magnet 56 from the upper spindle 9a. The rim detachment mechanism 51 has a configuration for pressing downward a portion of the upper surface 12S of the upper rim 12a that is spaced radially outward from the upper spindle 9a. Hereinafter, the rim separation mechanism 51 will be specifically described.
図5~図7に示されるように、リム交換機構50におけるリム離脱機構51は、上スピンドル9aにおける前記複数の永久磁石56が上リム12aを上スピンドル9aに引き寄せる磁力から前記上リム12aの重量を減算した値よりも大きな力で上リム12aの前記上面12Sを下向きに押圧するためのものである。
As shown in FIGS. 5 to 7, the rim removal mechanism 51 in the rim replacement mechanism 50 is configured such that the plurality of permanent magnets 56 in the upper spindle 9a pulls the upper rim 12a toward the upper spindle 9a and the weight of the upper rim 12a. The upper surface 12S of the upper rim 12a is pressed downward with a force larger than the value obtained by subtracting.
リム交換機構50(リム離脱機構51)は、少なくとも1つの押圧部材62と、少なくとも1つのエアシリンダ61(アクチュエータ)と、を備える。具体的に、本実施形態に係るリム交換機構50は、1つの押圧部材62と、複数のエアシリンダ61とを有する。図5-7では、1つの押圧部材62と1つのエアシリンダ61のみが図示されている。前記複数のエアシリンダ61は、上スピンドル9aの周りに周方向に互いに間隔をおいて配置されている。前記押圧部材62は、前記複数のエアシリンダ61の下方に配置されている。
The rim replacement mechanism 50 (rim removal mechanism 51) includes at least one pressing member 62 and at least one air cylinder 61 (actuator). Specifically, the rim replacement mechanism 50 according to the present embodiment has one pressing member 62 and a plurality of air cylinders 61. 5-7, only one pressing member 62 and one air cylinder 61 are shown. The plurality of air cylinders 61 are arranged around the upper spindle 9a at intervals in the circumferential direction. The pressing member 62 is disposed below the plurality of air cylinders 61.
前記押圧部材62は、本体部62Aと、弾性部63と、を有する。前記本体部62Aは、前記上リム12aの前記上面12Sに対して下向きの押圧力を加えるための少なくとも一つの押圧面62Sを有する。前記弾性部63は、その弾性力により前記本体部62Aに対して上下方向の力を加えるために設けられている。
The pressing member 62 includes a main body portion 62A and an elastic portion 63. The main body 62A has at least one pressing surface 62S for applying a downward pressing force to the upper surface 12S of the upper rim 12a. The elastic portion 63 is provided to apply a vertical force to the main body portion 62A by its elastic force.
当該弾性部63は、少なくとも一つの第1のばね体63aと、少なくとも一つの第2のばね体63bと、を含む。前記第1のばね体63aは、後述する中間部材68の下側に配置されており、主として、前記本体部62Aに対して下向きの押圧力(弾性力)を加えるために設けられている。前記第2のばね体63bは、当該中間部材68の上側に配置されており、主として、当該本体部62Aに対して上向きの押圧力(弾性力)を加えて当該本体部62Aを支えるために設けられている。
The elastic portion 63 includes at least one first spring body 63a and at least one second spring body 63b. The first spring body 63a is disposed below the intermediate member 68 described later, and is mainly provided to apply a downward pressing force (elastic force) to the main body portion 62A. The second spring body 63b is disposed on the upper side of the intermediate member 68, and is mainly provided to support the body portion 62A by applying an upward pressing force (elastic force) to the body portion 62A. It has been.
各エアシリンダ61は、前記押圧部材62の前記本体部62Aを上方位置と下方位置とを含む範囲において上下方向に変位させるためのものである。前記上方位置は、図6に示すように、前記上スピンドル9aに装着された前記上リム12aの前記上面12Sよりも前記本体部62Aの前記押圧面62Sが上方に位置する位置である。前記下方位置は、前記上方位置よりも下方の位置である。前記下方位置は、前記本体部62Aの前記押圧面62Sが前記上リム12aの前記上面12Sに対して前記下向きの押圧力を加えながら前記本体部62Aが当該下方位置に向かって下方に移動することにより、図5に示すように、前記上リム12aの前記上面12Sを前記上スピンドル9aの前記下面9Sから下方に離すことを可能にする位置である。本実施形態では、前記上方位置は、前記押圧面62Sが前記上スピンドル9aの前記下面9Sよりも上方に配置される位置であり、前記下方位置は、前記押圧面62Sが前記上スピンドル9aの前記下面9Sよりも下方に配置される位置である。
Each air cylinder 61 is for displacing the main body 62A of the pressing member 62 in the vertical direction within a range including an upper position and a lower position. As shown in FIG. 6, the upper position is a position where the pressing surface 62S of the main body 62A is located above the upper surface 12S of the upper rim 12a mounted on the upper spindle 9a. The lower position is a position below the upper position. In the lower position, the main body 62A moves downward toward the lower position while the pressing surface 62S of the main body 62A applies the downward pressing force to the upper surface 12S of the upper rim 12a. Accordingly, as shown in FIG. 5, the upper surface 12S of the upper rim 12a is a position that allows the lower surface 9S of the upper spindle 9a to be separated downward. In the present embodiment, the upper position is a position where the pressing surface 62S is disposed above the lower surface 9S of the upper spindle 9a, and the lower position is the position where the pressing surface 62S is the upper spindle 9a. It is a position arranged below the lower surface 9S.
前記本体部62Aは、本体部下限位置と本体部上限位置との間で上下方向に変位可能に構成されている。前記本体部下限位置は、当該本体部62Aが上下方向に変位可能な範囲のうちの最も下方の位置であり、エアシリンダ61における実質的な下側のストロークエンドに対応する本体部62Aの位置である。前記本体部上限位置は、当該本体部62Aが上下方向に変位可能な範囲のうちの最も上方の位置であり、エアシリンダ61における実質的な上側のストロークエンドに対応する本体部62Aの位置である。
The main body 62A is configured to be vertically displaceable between the main body lower limit position and the main body upper limit position. The lower limit position of the main body portion is the lowest position in the range in which the main body portion 62A can be displaced in the vertical direction, and is the position of the main body portion 62A corresponding to the substantially lower stroke end in the air cylinder 61. is there. The upper limit position of the main body portion is the uppermost position in the range in which the main body portion 62A can be displaced in the vertical direction, and is the position of the main body portion 62A corresponding to the substantially upper stroke end in the air cylinder 61. .
前記本体部62Aの前記下方位置は、前記本体部下限位置でなくてもよく、当該本体部下限位置よりも上方の位置であってもよい。また、前記本体部62Aの前記上方位置は、前記本体部上限位置でなくてもよく、当該本体部上限位置よりも下方の位置であってもよい。前記アクチュエータとしてのエアシリンダ61は、前記本体部62Aを前記本体部下限位置と前記本体部上限位置との間において変位させるように作動する。
The lower position of the main body portion 62A may not be the main body portion lower limit position, but may be a position above the main body portion lower limit position. Further, the upper position of the main body portion 62A may not be the main body portion upper limit position, and may be a position below the main body portion upper limit position. The air cylinder 61 as the actuator operates to displace the main body 62A between the main body lower limit position and the main body upper limit position.
図5は、本体部62Aが待機位置にある状態を示している。当該待機位置は、前記弾性部63による弾性力と、本体部62Aの重量とがつり合った状態にあるときの前記本体部62Aの位置である。前記本体部62Aが当該待機位置に配置されているときには、前記本体部62Aの前記押圧面62Sが前記上スピンドル9aの前記下面9Sよりも下方に配置される。当該待機位置は、前記下方位置と同じであってもよく、前記下方位置と前記本体部下限位置との間の位置であってもよく、前記本体部下限位置と同じ位置であってもよい。
FIG. 5 shows a state where the main body 62A is in the standby position. The standby position is the position of the main body portion 62A when the elastic force by the elastic portion 63 and the weight of the main body portion 62A are balanced. When the main body 62A is disposed at the standby position, the pressing surface 62S of the main body 62A is disposed below the lower surface 9S of the upper spindle 9a. The standby position may be the same as the lower position, may be a position between the lower position and the main body lower limit position, or may be the same position as the main body lower limit position.
前記本体部62Aが前記下方位置に配置されているときには、前記第1のばね体63aは、その弾性力により前記本体部62Aに対して下向きの押圧力を加える。前記待機位置が前記下方位置よりもさらに下方の位置である場合、前記本体部62Aが当該待機位置に配置されているときに、前記第1のばね体63aは、前記本体部62Aに対して下向きの押圧力を加えるように構成されていることが好ましいが、必ずしも前記本体部62Aに対して下向きの押圧力を加えるように構成されていなくてもよい。すなわち、前記本体部62Aが前記下方位置よりもさらに下方の位置に配置されているときには、前記第1のばね体63aが最大限伸びた状態であってもよい。
When the main body 62A is disposed at the lower position, the first spring body 63a applies a downward pressing force to the main body 62A by its elastic force. When the standby position is further below the lower position, the first spring body 63a faces downward with respect to the main body 62A when the main body 62A is disposed at the standby position. However, it is not always necessary to apply a downward pressing force to the main body portion 62A. That is, when the main body 62A is disposed at a position further lower than the lower position, the first spring body 63a may be in a fully extended state.
各エアシリンダ61は、シリンダ本体61Aと、ピストン74と、シリンダロッド75と、を有する。前記シリンダ本体61Aは、シリンダ室73を区画する筒形状(具体的には、円筒形状)を有する部材である。前記ピストン74は、前記シリンダ室73に収容されて前記シリンダ室73を上室73Uと下室73Dとに画定する。前記ピストン74は、前記シリンダ室73において上下方向に昇降可能に構成されている。前記押圧部材62の前記本体部62Aは、前記ピストン74が上下方向に昇降するのに伴って上下方向に変位するように構成されている。各エアシリンダ61の前記シリンダ本体61Aは、ブラケットを介してフレーム52に取り付けられている。
Each air cylinder 61 has a cylinder body 61A, a piston 74, and a cylinder rod 75. The cylinder body 61 </ b> A is a member having a cylindrical shape (specifically, a cylindrical shape) that partitions the cylinder chamber 73. The piston 74 is accommodated in the cylinder chamber 73 and defines the cylinder chamber 73 into an upper chamber 73U and a lower chamber 73D. The piston 74 is configured to be movable up and down in the cylinder chamber 73. The main body 62A of the pressing member 62 is configured to be displaced in the vertical direction as the piston 74 moves up and down in the vertical direction. The cylinder body 61A of each air cylinder 61 is attached to the frame 52 via a bracket.
エアシリンダ61は、下向きに押圧力を発生させることが可能である。エアシリンダ61の設置数は、複数の永久磁石56の設置数や磁力の強さに応じて適宜設定される。図5~図7に示す実施形態では、リム交換機構50は、2つのエアシリンダ61を備える。なお、複数のエアシリンダ61は周方向に等間隔で配置されるのが好ましい。全てのエアシリンダ61は互いに同期して作動するように構成される。
The air cylinder 61 can generate a pressing force downward. The number of installed air cylinders 61 is appropriately set according to the number of installed permanent magnets 56 and the strength of the magnetic force. In the embodiment shown in FIGS. 5 to 7, the rim replacement mechanism 50 includes two air cylinders 61. The plurality of air cylinders 61 are preferably arranged at equal intervals in the circumferential direction. All the air cylinders 61 are configured to operate in synchronization with each other.
エアシリンダ61の前記シリンダ室73には、図略のコンプレッサにおいて生成された圧縮空気が供給される。
Compressed air generated in a compressor (not shown) is supplied to the cylinder chamber 73 of the air cylinder 61.
前記シリンダロッド75は、ピストン74の下端に連結され、ピストン74の上下移動に伴って上下方向に移動可能に構成されている。本実施形態では、前記シリンダロッド75は、ピストン74から下方に延びる棒状の部材により構成される。当該シリンダロッド75の下端部には、前記押圧部材62の前記本体部62Aが連結されている。
The cylinder rod 75 is connected to the lower end of the piston 74 and is configured to be movable in the vertical direction as the piston 74 moves up and down. In the present embodiment, the cylinder rod 75 is constituted by a rod-shaped member extending downward from the piston 74. The main body 62 </ b> A of the pressing member 62 is connected to the lower end of the cylinder rod 75.
図5に示すように、リム交換機構50は、切替弁78と、コントローラ80と、複数のセンサと、をさらに備える。
As shown in FIG. 5, the rim replacement mechanism 50 further includes a switching valve 78, a controller 80, and a plurality of sensors.
前記エアシリンダ61のシリンダ本体61Aは、シリンダ室73の前記上室73Uに連通する上側のポート76と、前記下室73Dに連通する下側のポート77と、を有する。上側のポート76及び下側のポート77のそれぞれには、図示しないコンプレッサから圧縮空気が供給されることが可能である。前記コンプレッサと2つのポート76、77のそれぞれとは、2本の配管により接続されている。前記切替弁78は、前記コンプレッサと前記エアシリンダ61との間に介在し、前記2つのポート76、77への圧縮空気の供給状態を切り替えることが可能である。
The cylinder body 61A of the air cylinder 61 has an upper port 76 that communicates with the upper chamber 73U of the cylinder chamber 73, and a lower port 77 that communicates with the lower chamber 73D. Each of the upper port 76 and the lower port 77 can be supplied with compressed air from a compressor (not shown). The compressor and each of the two ports 76 and 77 are connected by two pipes. The switching valve 78 is interposed between the compressor and the air cylinder 61, and can switch the supply state of compressed air to the two ports 76 and 77.
前記切替弁78は、電磁式の切替弁などにより構成される。当該切替弁78は、流路を選択的に切り替え可能な弁である。前記切替弁78は、圧縮空気の供給状態を、「上側のポート76に圧縮空気を供給すると共に下側のポート77を開放する状態」、「下側のポート77に圧縮空気を供給すると共に上側のポート76を開放する状態」、「上下双方のポート76、77を開放する状態」のいずれかに切り替え可能に構成されている。
The switching valve 78 is constituted by an electromagnetic switching valve or the like. The switching valve 78 is a valve capable of selectively switching the flow path. The switching valve 78 changes the supply state of the compressed air to “the state where the compressed air is supplied to the upper port 76 and the lower port 77 is opened”, “the compressed air is supplied to the lower port 77 and the upper side is opened. It is possible to switch between “a state in which the port 76 is opened” and “a state in which both the upper and lower ports 76 and 77 are opened”.
前記複数のセンサは、前記上リム12aが前記上スピンドル9aに装着されたことを検知可能な図略の第1センサと、前記エアシリンダ61の前記ピストン74の位置を検知可能な図略の第2センサと、を含む。これらのセンサから出力される信号は、コントローラ80に入力される。
The plurality of sensors include a first sensor (not shown) that can detect that the upper rim 12a is mounted on the upper spindle 9a, and a first sensor (not shown) that can detect the position of the piston 74 of the air cylinder 61. 2 sensors. Signals output from these sensors are input to the controller 80.
前記コントローラ80は、コンピュータなどにより構成される。前記コントローラ80は、切替弁制御部81と、装着状態判定部82と、ピストン位置判定部83と、を機能として有する。
The controller 80 is constituted by a computer or the like. The controller 80 has a switching valve control unit 81, a mounting state determination unit 82, and a piston position determination unit 83 as functions.
前記切替弁制御部81は、前記切替弁78の動作を制御する。前記装着状態判定部83は、前記第1センサから入力される信号に基づいて前記上リム12aが前記上スピンドル9aに装着されたか否かを判定する。前記ピストン位置判定部83は、前記第2センサから入力される信号に基づいて前記エアシリンダ61のピストン74が上限位置に達したか否かを判定する。
The switching valve control unit 81 controls the operation of the switching valve 78. The mounting state determination unit 83 determines whether or not the upper rim 12a is mounted on the upper spindle 9a based on a signal input from the first sensor. The piston position determination unit 83 determines whether the piston 74 of the air cylinder 61 has reached the upper limit position based on a signal input from the second sensor.
前記切替弁78は、例えば、コントローラ80から出力される指令信号に基づいて、第1許容状態と、第2許容状態と、阻止状態との間で切り替わる電磁式の切替弁として構成されている。
The switching valve 78 is configured as an electromagnetic switching valve that switches between a first allowable state, a second allowable state, and a blocking state based on a command signal output from the controller 80, for example.
前記第1許容状態は、前記コンプレッサからの圧縮空気が前記エアシリンダ61の前記下室73Dに供給されることを許容するとともに前記上室73Uから空気が排出されることを許容する。前記第2許容状態は、前記コンプレッサからの圧縮空気が前記上室73Uに供給されることを許容するとともに前記下室73Dから空気が排出されることを許容する。前記阻止状態は、前記上室73U及び前記下室73Dから空気が排出されることを許容するとともに前記コンプレッサからの前記圧縮空気が前記上室73U及び前記下室73Dに供給されることを阻止する。
The first permissible state allows compressed air from the compressor to be supplied to the lower chamber 73D of the air cylinder 61 and allows air to be discharged from the upper chamber 73U. The second allowable state allows compressed air from the compressor to be supplied to the upper chamber 73U and allows air to be discharged from the lower chamber 73D. The blocking state allows air to be discharged from the upper chamber 73U and the lower chamber 73D, and prevents the compressed air from the compressor from being supplied to the upper chamber 73U and the lower chamber 73D. .
前記押圧部材62は、エアシリンダ61の下方に設けられている。本実施形態では、前記押圧部材62の前記弾性部63は、複数の第1のばね体63aと、複数の第2のばね体63bと、を含む。前記複数の第1のばね体63a及び前記複数の第2のばね体63bのそれぞれは、圧縮ばね(コイルばね)であるが、圧縮ばねに限られず、他の種類のばねであってもよい。
The pressing member 62 is provided below the air cylinder 61. In the present embodiment, the elastic portion 63 of the pressing member 62 includes a plurality of first spring bodies 63a and a plurality of second spring bodies 63b. Each of the plurality of first spring bodies 63a and the plurality of second spring bodies 63b is a compression spring (coil spring), but is not limited to a compression spring and may be other types of springs.
前記押圧部材62の前記本体部62Aは、少なくとも一つのコネクタ部材65(上側部材の一例)と、少なくとも1つの棒体64と、少なくとも一つの下部構造体と、を有する。本実施形態では、本体部62Aは、複数のコネクタ部材65と、複数の棒体64と、1つの下部構造体(下側部材の一例)と、を有し、前記下部構造体は、少なくとも一つのリング体67と、少なくとも一つの押圧片70と、を含む。具体的に、本実施形態では、前記下部構造体は、1つのリング体67と、複数の押圧片70と、を含む。なお、本実施形態では、前記第1のばね体63aは、前記本体部62Aが前記下方位置に配置されるときに、前記本体部62Aのうちの前記下部構造体に対して下向きの押圧力を加えるように構成され、より具体的には、前記下部構造体のうちの前記リング体67に対して下向きの押圧力を加えるように構成されている。
The main body 62A of the pressing member 62 includes at least one connector member 65 (an example of an upper member), at least one rod body 64, and at least one lower structure. In the present embodiment, the main body 62A has a plurality of connector members 65, a plurality of rods 64, and one lower structure (an example of a lower member), and the lower structure has at least one lower structure. One ring body 67 and at least one pressing piece 70 are included. Specifically, in the present embodiment, the lower structure includes one ring body 67 and a plurality of pressing pieces 70. In the present embodiment, the first spring body 63a exerts a downward pressing force on the lower structure of the main body 62A when the main body 62A is disposed at the lower position. More specifically, it is configured to apply a downward pressing force to the ring body 67 of the lower structure.
前記複数のコネクタ部材65は、前記複数のエアシリンダ61にそれぞれ対応する位置に配置されている。前記複数のコネクタ部材65のそれぞれは、対応するエアシリンダ61のシリンダロッド75の下端部に連結されている。具体的には、前記シリンダロッド75の下端部は、前記コネクタ部材65に対して上下方向の遊びを有して相対移動可能に連結されている。
The plurality of connector members 65 are disposed at positions corresponding to the plurality of air cylinders 61, respectively. Each of the plurality of connector members 65 is connected to the lower end portion of the cylinder rod 75 of the corresponding air cylinder 61. Specifically, the lower end portion of the cylinder rod 75 is connected to the connector member 65 so as to be relatively movable with play in the vertical direction.
各コネクタ部材65と前記下部構造体との間には、前記複数の棒体64のうちの少なくとも一つの棒体64が介在している。前記複数の棒体64のそれぞれは、対応するコネクタ部材65から下方に延びる棒状の部材である。複数の棒体64のそれぞれは、対応するコネクタ部材65と前記下部構造体のリング体67との間で上下方向に延びてこれらを連結する。各棒体64は、対応する前記第1のばね体63a及び前記第2のばね体63bを貫通して当該第1のばね体63a及び前記第2のばね体63bを支持する。具体的に、各棒体64は、後述する中間部材68を介して上下に並ぶ前記第1のばね体63aと前記第2のばね体63bの中心部を上下に貫通するように配置されている。各棒体64は、外力が加わっていない状態(自由長さの状態)の前記第1のばね体63a及び前記第2のばね体63bの上下方向の長さよりやや短い長さに設定されている。押圧部材62は、エアシリンダ61で発生した押圧力を上リム12aの上面12Sに伝えて上リム12aを下方へ押圧する。
Between each connector member 65 and the lower structure, at least one of the plurality of rods 64 is interposed. Each of the plurality of rod bodies 64 is a rod-like member extending downward from the corresponding connector member 65. Each of the plurality of rod bodies 64 extends in the vertical direction between the corresponding connector member 65 and the ring body 67 of the lower structure to connect them. Each rod 64 passes through the corresponding first spring body 63a and second spring body 63b, and supports the first spring body 63a and the second spring body 63b. Specifically, each rod body 64 is disposed so as to vertically penetrate the center portion of the first spring body 63a and the second spring body 63b arranged vertically via an intermediate member 68 described later. . Each rod body 64 is set to a length slightly shorter than the vertical length of the first spring body 63a and the second spring body 63b in a state where an external force is not applied (free length state). . The pressing member 62 transmits the pressing force generated by the air cylinder 61 to the upper surface 12S of the upper rim 12a and presses the upper rim 12a downward.
前記下部構造体の前記リング体67は、前記複数の棒体64の下端部に連結されている。前記複数の押圧片70は、前記リング体67の下面から下方にそれぞれ延びている。本実施形態では、前記本体部62Aの前記下部構造体は、複数の押圧面62Sを有し、当該複数の押圧面62Sは、前記複数の押圧片70の下面によってそれぞれ構成されている。なお、前記複数の押圧片70の位置及び個数は、前記複数のエアシリンダ61の位置及び個数に対応していなくてもよい。
The ring body 67 of the lower structure is connected to lower ends of the plurality of rod bodies 64. The plurality of pressing pieces 70 respectively extend downward from the lower surface of the ring body 67. In the present embodiment, the lower structure of the main body portion 62 </ b> A has a plurality of pressing surfaces 62 </ b> S, and the plurality of pressing surfaces 62 </ b> S are respectively configured by the lower surfaces of the plurality of pressing pieces 70. Note that the position and number of the plurality of pressing pieces 70 may not correspond to the position and number of the plurality of air cylinders 61.
前記リム交換機構50は、前記コネクタ部材65と前記下部構造体との間に配置された中間部材68(本発明における支持部材の一例)をさらに備える。当該中間部材68は、前記シリンダ本体61Aとの相対位置が一定であり、前記上スピンドル9aとの相対位置が一定である。前記中間部材68及び前記シリンダ本体61Aの取り付け位置は、互いの相対位置を固定できる場所であれば特に限定されない。前記中間部材68及び前記シリンダ本体61Aは、例えば、図略のブラケット等を介して前記フレーム52に支持されてもよい。また、これらは、上スピンドル9aを構成する部材のうち回転しない部分(例えば上スピンドル9aの胴部など)に支持されてもよい。また、中間部材68(支持部材)は、上スピンドル9aとは別の部材ではなく、上スピンドルの一部であってもよい。
The rim replacement mechanism 50 further includes an intermediate member 68 (an example of a support member in the present invention) disposed between the connector member 65 and the lower structure. The relative position of the intermediate member 68 with respect to the cylinder body 61A is constant, and the relative position with respect to the upper spindle 9a is constant. The attachment position of the intermediate member 68 and the cylinder body 61A is not particularly limited as long as the relative position can be fixed. The intermediate member 68 and the cylinder main body 61A may be supported by the frame 52 via, for example, a bracket (not shown). Moreover, these may be supported by the part which does not rotate among the members which comprise the upper spindle 9a (for example, trunk | drum etc. of the upper spindle 9a). Further, the intermediate member 68 (support member) may be a part of the upper spindle, not a member different from the upper spindle 9a.
コネクタ部材65はフランジ部66を有する。当該フランジ部66は、水平方向(例えば前後方向)に張り出す形状を有する。各フランジ部66の下面には前記棒体64の上端が接続されている。当該棒体64を取り巻くように前記第1のばね体63a及び前記第2のばね体63bが配置されている。各棒体64は押圧部材62の機能の一つである押し棒としての役目を果たす。各棒体64の下端は、リング体67の上面に接続されている。
The connector member 65 has a flange portion 66. The flange portion 66 has a shape protruding in the horizontal direction (for example, the front-rear direction). The upper end of the rod body 64 is connected to the lower surface of each flange portion 66. The first spring body 63a and the second spring body 63b are arranged so as to surround the rod body 64. Each bar 64 serves as a push bar, which is one of the functions of the pressing member 62. The lower end of each rod body 64 is connected to the upper surface of the ring body 67.
図5に示す具体例では、上述したように前記弾性部63を構成するばね体のそれぞれは、圧縮ばねである。前記複数の第1のばね体63aは、前記リング体67と前記中間部材68との間に介在する。前記複数の第2のばね体63bは、前記中間部材68と対応する前記コネクタ部材65との間に介在する。 前記複数の第1のばね体63a及び前記複数の第2のばね体63bのそれぞれは、上下方向に長い形状を有し、上下方向に伸縮するように構成される。前記中間部材68は、前記複数の第1のばね体63aのぞれぞれの一端部(上端部)を支持し、前記リング体67は、前記複数の第1のばね体63aのそれぞれの他端部(下端部)を支持する。これにより、前記複数の第1のばね体63aのそれぞれは、中間部材68により上方への移動が規制され、前記リング体67により下方への移動が規制されている。前記複数の第1のばね体63aのそれぞれは、前記中間部材68に対して前記本体部62Aが上方に相対移動するのに伴って収縮し、前記中間部材68に対して前記本体部62Aが下方に相対移動するのに伴って伸張する。
In the specific example shown in FIG. 5, as described above, each of the spring bodies constituting the elastic portion 63 is a compression spring. The plurality of first spring bodies 63 a are interposed between the ring body 67 and the intermediate member 68. The plurality of second spring bodies 63b are interposed between the intermediate member 68 and the corresponding connector member 65. Each of the plurality of first spring bodies 63a and the plurality of second spring bodies 63b has a shape that is long in the vertical direction and is configured to expand and contract in the vertical direction. The intermediate member 68 supports one end (upper end) of each of the plurality of first spring bodies 63a, and the ring body 67 is the other of the plurality of first spring bodies 63a. Supports the end (lower end). Accordingly, each of the plurality of first spring bodies 63 a is restricted from moving upward by the intermediate member 68, and is restricted from moving downward by the ring body 67. Each of the plurality of first spring bodies 63a contracts as the main body 62A moves upward relative to the intermediate member 68, and the main body 62A moves downward relative to the intermediate member 68. Stretches with relative movement.
前記中間部材68は、前記複数の第2のばね体63bのそれぞれの一端部(下端部)を支持し、前記複数のコネクタ部材65のそれぞれは、前記複数の第2のばね体63bのうちの対応する第2のばね体63bの他端部(上端部)を支持する。これにより、前記複数の第2のばね体63bのそれぞれは、前記中間部材68により下方への移動が規制され、前記コネクタ部材65により上方への移動が規制されている。前記複数の第2のばね体63bのそれぞれは、前記中間部材68に対して前記本体部62Aが上方に相対移動するのに伴って伸張し、前記中間部材68に対して前記本体部62Aが下方に相対移動するのに伴って収縮する。
The intermediate member 68 supports one end (lower end) of each of the plurality of second spring bodies 63b, and each of the plurality of connector members 65 includes one of the plurality of second spring bodies 63b. The other end (upper end) of the corresponding second spring body 63b is supported. Thereby, each of the plurality of second spring bodies 63b is restricted from moving downward by the intermediate member 68 and is restricted from moving upward by the connector member 65. Each of the plurality of second spring bodies 63 b expands as the main body portion 62 </ b> A moves upward relative to the intermediate member 68, and the main body portion 62 </ b> A moves downward relative to the intermediate member 68. It contracts with relative movement.
前記中間部材68は、当該中間部材68を上下方向に貫通する複数の挿通孔を有する。当該複数の挿通孔には、前記複数の棒体64がそれぞれ挿通されている。この中間部材68の前記複数の挿通孔のそれぞれにはすべりブシュ68aが配置されている。当該すべりブシュ68aは、前記棒体64と前記中間部材68との抵抗を小さくしつつ前記棒体64をガイドする。
The intermediate member 68 has a plurality of insertion holes that penetrate the intermediate member 68 in the vertical direction. The plurality of rod bodies 64 are inserted through the plurality of insertion holes, respectively. A sliding bush 68a is disposed in each of the plurality of insertion holes of the intermediate member 68. The sliding bush 68 a guides the rod body 64 while reducing the resistance between the rod body 64 and the intermediate member 68.
このすべりブシュ68aは、当該すべりブシュ68aを上下方向に貫通する貫通孔を有する円筒形状を呈している。当該すべりブシュ68aの前記貫通孔には、対応する前記棒体64が摺動可能に挿通されている。すなわち、前記中間部材68の前記複数の挿通孔のそれぞれの内周面と、当該挿通孔に挿通された棒体64との間には、前記すべりブシュ68aが介在している。
This sliding bush 68a has a cylindrical shape having a through-hole penetrating the sliding bush 68a in the vertical direction. The corresponding rod body 64 is slidably inserted into the through hole of the sliding bush 68a. That is, the sliding bush 68a is interposed between the inner peripheral surface of each of the plurality of insertion holes of the intermediate member 68 and the rod body 64 inserted through the insertion hole.
前記中間部材68は、複数の前記すべりブシュ68aを介して前記複数の棒体64をそれぞれ支えている。このため、前記複数の棒体64のそれぞれは、一方向にのみ(上下方向にのみ)変位し、上下方向以外の方向、例えば左右方向(水平方向)に変位することが抑制される。したがって、前記複数の棒体64のそれぞれにおいて、当該棒体64の軸振れ等の問題が発生することが抑制される。すなわち、前記すべりブシュ68aは棒体64が上下方向の移動のみを行うように棒体64の動作を制限する。その結果として、リング体67が傾いて押圧片70の下面である押圧面62Sが上リム12aの上面12Sを不均等に押圧するのを防ぐことができる。
The intermediate member 68 supports the plurality of rod bodies 64 via the plurality of sliding bushes 68a. For this reason, each of the plurality of rod bodies 64 is displaced only in one direction (only in the vertical direction), and is prevented from being displaced in a direction other than the vertical direction, for example, in the horizontal direction (horizontal direction). Therefore, in each of the plurality of rod bodies 64, problems such as shaft runout of the rod body 64 are suppressed. That is, the sliding bush 68a restricts the operation of the rod body 64 so that the rod body 64 only moves in the vertical direction. As a result, it is possible to prevent the ring body 67 from being inclined and the pressing surface 62S, which is the lower surface of the pressing piece 70, from pressing the upper surface 12S of the upper rim 12a unevenly.
また、前記押圧部材62の本体部62Aが複数のエアシリンダ61のそれぞれのシリンダロッド75と連結されている場合に、前記すべりブシュ68aは前記押圧部材62の本体部62Aが上下方向に安定して動作することを可能にする。具体的には、前記中間部材68及び前記複数のすべりブシュ68aは前記複数の棒体64のそれぞれの動作方向を上下方向に制限している。当該複数の棒体64は前記押圧部材62の本体部62Aの一部であるので、本体部62Aが上下方向に動作するときには、当該本体部62Aが上下方向に対して傾斜した方向に動作すること、及び前記本体部62Aの姿勢が傾くことが抑制される。より具体的には、例えば、前記複数のエアシリンダ61のうちの一部のエアシリンダ61においてエアの詰まりやゴミの噛み込み等の不具合が生じて当該一部のエアシリンダ61が正常に動作しない場合に、仮に、前記すべりブシュ68aが設けられていなければ、前記本体部62A(具体的には、リング体67及び押圧片70)の姿勢が傾いてしまうことがある。一方、中間部材68の前記複数の挿通孔のそれぞれに前記すべりブシュ68aが設けられることにより、前記複数のエアシリンダ61に連結された前記本体部62Aの動作方向が上下方向に対して傾斜すること、及び前記本体部62Aの姿勢が傾くことが抑制される。
Further, when the main body 62A of the pressing member 62 is connected to the cylinder rod 75 of each of the plurality of air cylinders 61, the sliding bush 68a has the main body 62A of the pressing member 62 stably in the vertical direction. To be able to work. Specifically, the intermediate member 68 and the plurality of sliding bushes 68a restrict the operating directions of the plurality of rod bodies 64 in the vertical direction. Since the plurality of rod bodies 64 are a part of the main body portion 62A of the pressing member 62, when the main body portion 62A operates in the vertical direction, the main body portion 62A operates in a direction inclined with respect to the vertical direction. , And the inclination of the main body 62A is suppressed. More specifically, for example, in some air cylinders 61 among the plurality of air cylinders 61, problems such as air clogging and dust biting occur, and the some air cylinders 61 do not operate normally. In this case, if the sliding bush 68a is not provided, the posture of the main body 62A (specifically, the ring body 67 and the pressing piece 70) may be inclined. On the other hand, the sliding bush 68a is provided in each of the plurality of insertion holes of the intermediate member 68, so that the operation direction of the main body 62A connected to the plurality of air cylinders 61 is inclined with respect to the vertical direction. , And the inclination of the main body 62A is suppressed.
上記のようにシリンダ本体61Aとの相対位置が固定されている中間部材68を境にして第1のばね体63aと第2のばね体63bとを上下に分けて配置した理由は、本体部62Aの重量に応じた弾性部63の適切なストロークとバネ力を設定するときの設計の自由度を高めるためである。具体的には次の通りである。仮に、前記第1のばね体63a及び前記第2のばね体63bを一体のばねとして設計すると、弾性部63として要求される条件が一般的な市販品では満たされ難いため、特注品のばねを用意する必要があり、コストが上がる。本実施形態のように、中間部材68を境にして上下に分割された前記第1のばね体63a及び前記第2のばね体63bが弾性部63として用いられる場合、弾性部63の設計自由度が高まる。このことは、前記第1のばね体63a及び前記第2のばね体63bを選定するときの選択肢が広がることを可能にし、これにより、コストを下げることができる。なお、前記弾性部63を構成するばねのストロークとバネ力は、以下の複数の条件を満たす必要があり、これらの条件に対応することは、一般的な市販品では難しい。
The reason why the first spring body 63a and the second spring body 63b are arranged separately on the upper and lower sides with the intermediate member 68 whose relative position to the cylinder body 61A is fixed as described above is as follows. This is to increase the degree of design freedom when setting an appropriate stroke and spring force of the elastic part 63 according to the weight of the elastic member 63. Specifically, it is as follows. If the first spring body 63a and the second spring body 63b are designed as an integral spring, the condition required for the elastic portion 63 is difficult to be satisfied by a general commercial product. It is necessary to prepare, and the cost increases. When the first spring body 63a and the second spring body 63b divided up and down with the intermediate member 68 as a boundary are used as the elastic portion 63 as in the present embodiment, the degree of freedom in design of the elastic portion 63 Will increase. This makes it possible to expand the options for selecting the first spring body 63a and the second spring body 63b, thereby reducing the cost. Note that the stroke and spring force of the spring constituting the elastic portion 63 must satisfy the following conditions, and it is difficult for general commercial products to meet these conditions.
[条件1]後述する待機状態(エアシリンダ61に対してエアによる加圧がされていない状態)では、押圧部材62の下面62Sが、上スピンドル9aのフランジ部55の下面9Sよりも下方に位置する。
[Condition 1] In a standby state (state in which the air cylinder 61 is not pressurized by air), which will be described later, the lower surface 62S of the pressing member 62 is positioned below the lower surface 9S of the flange portion 55 of the upper spindle 9a. To do.
[条件2]上リム12aが上スピンドル9aに装着される過程におけるバネ力(弾性部63全体の弾性力)は、上リム12aの上面12Sが押圧部材62の下面62Sに接した時点(a)から、上リム12aの上面12Sがフランジ部55の下面9Sに接する時点(b)までの間に変化する。具体的には、前記時点(a)では、前記バネ力は、前記本体部62Aを支えるために上向きに働いているが、前記時点(a)から前記時点(b)までの間に下向きに転じ、前記時点(b)においては下向きに働く。
[Condition 2] The spring force (elastic force of the entire elastic portion 63) in the process of mounting the upper rim 12a on the upper spindle 9a is the point when the upper surface 12S of the upper rim 12a contacts the lower surface 62S of the pressing member 62 (a). Until the point (b) when the upper surface 12S of the upper rim 12a contacts the lower surface 9S of the flange portion 55. Specifically, at the time point (a), the spring force works upward to support the main body 62A, but turns downward between the time point (a) and the time point (b). In the time point (b), it works downward.
[条件3]上リム12aが上スピンドル9aに装着された直後の状態(上リム12aの上面12Sがフランジ部55の下面9Sに接しており、かつ、エアシリンダ61に対してエアによる加圧がされていない状態)では、前記バネ力は、下向きに働いているが、上リム12aを上スピンドル9aから離脱させない程度の力である。
[Condition 3] Immediately after the upper rim 12a is mounted on the upper spindle 9a (the upper surface 12S of the upper rim 12a is in contact with the lower surface 9S of the flange portion 55, and the air cylinder 61 is pressurized by air. In a state where the upper rim 12a is not moved away from the upper spindle 9a, the spring force works downward.
前記上リム12aが前記上スピンドル9aに装着された状態において前記第1のばね体63aが前記本体部62Aに対して加える前記下向きの押圧力(弾性部63の前記バネ力)は、前記永久磁石56による磁力から前記上リム12aの重量を減算した値よりも小さくなるように設定されている。
In the state where the upper rim 12a is mounted on the upper spindle 9a, the downward pressing force (the spring force of the elastic portion 63) applied by the first spring body 63a to the main body portion 62A is the permanent magnet. 56 is set to be smaller than a value obtained by subtracting the weight of the upper rim 12a from the magnetic force of 56.
押圧部材62の下端に位置する押圧面62S、すなわち、押圧片70の下端に位置する押圧面62Sは、前記上リム12aの上面12Sに対して上下方向に対向している。当該押圧面62Sは、上スピンドル9aに固定された(保持された)上リム12aの上面12Sに押圧力を加えることができる。当該押圧面62Sが前記上リム12aの上面12Sを押圧する位置は、フランジ部55において永久磁石56が取り付けられた位置よりも上スピンドル9aの径方向外側の位置である。具体的には、前記押圧面62Sが前記上面12Sを押圧する位置は、平面視において、フランジ部55の外周面よりも径方向外側に離れた位置である。
The pressing surface 62S positioned at the lower end of the pressing member 62, that is, the pressing surface 62S positioned at the lower end of the pressing piece 70 faces the upper surface 12S of the upper rim 12a in the vertical direction. The pressing surface 62S can apply a pressing force to the upper surface 12S of the upper rim 12a fixed (held) to the upper spindle 9a. The position where the pressing surface 62S presses the upper surface 12S of the upper rim 12a is a position outside the radial direction of the upper spindle 9a with respect to the position where the permanent magnet 56 is attached in the flange portion 55. Specifically, the position where the pressing surface 62S presses the upper surface 12S is a position farther outward in the radial direction than the outer peripheral surface of the flange portion 55 in plan view.
押圧部材62の押圧面62Sは、上スピンドル9aを取り囲むように設けられたリング体67に接続されて下方に延びる押圧片70の下端面である。このリング体67の中央に穿孔された貫通孔69には、上スピンドル9aが遊嵌されている。リング体67の下面からは、複数の押圧片70(リム押し部材)が下方に延びるように設けられている。本実施形態では、一対の押圧片70が設けられている。各押圧片70は、平面視において、上スピンドル9aの外周に沿った円弧形状を有する。
The pressing surface 62S of the pressing member 62 is a lower end surface of the pressing piece 70 that is connected to a ring body 67 provided so as to surround the upper spindle 9a and extends downward. The upper spindle 9 a is loosely fitted in the through hole 69 drilled in the center of the ring body 67. A plurality of pressing pieces 70 (rim pressing members) are provided so as to extend downward from the lower surface of the ring body 67. In the present embodiment, a pair of pressing pieces 70 are provided. Each pressing piece 70 has an arc shape along the outer periphery of the upper spindle 9a in plan view.
次に、本実施形態に係るリム交換機構50を用いたリム交換方法について説明する。
Next, a rim replacement method using the rim replacement mechanism 50 according to this embodiment will be described.
図6は、タイヤ試験が行われているときのリム交換機構50の状態を示す。この状態では、切替弁78は、第1許容状態に切り替えられている。当該第1許容状態は、前記コンプレッサからの圧縮空気が下側のポート77に連通する前記下室73Dに供給されることを許容すると共に上側のポート76を通じて前記上室73Uの空気が排出されることを許容する。つまり、ピストン74により区画されるシリンダ室73の下室73Dのみにコンプレッサで圧縮された圧縮空気が供給され、ピストン74が上方に向かって移動する。これにより、エアシリンダ61のピストン74及びシリンダロッド75は上方に移動し、押圧部材62の前記本体部62A(押圧片70、リング体67、棒体64及びコネクタ部材65)も上方に移動する。前記押圧部材62の本体部62Aは、前記上方位置にあり、押圧片70の下端面、すなわち、押圧部材62の押圧面62Sは、上スピンドル9aの前記下面9S及び永久磁石56の下面よりも上方に位置し、上リム12aの上面12Sから上方に離れている。
FIG. 6 shows a state of the rim replacement mechanism 50 when the tire test is being performed. In this state, the switching valve 78 is switched to the first allowable state. In the first permissible state, the compressed air from the compressor is allowed to be supplied to the lower chamber 73D communicating with the lower port 77, and the air in the upper chamber 73U is discharged through the upper port 76. Allow that. That is, the compressed air compressed by the compressor is supplied only to the lower chamber 73D of the cylinder chamber 73 defined by the piston 74, and the piston 74 moves upward. As a result, the piston 74 and the cylinder rod 75 of the air cylinder 61 move upward, and the main body 62A (the pressing piece 70, the ring body 67, the rod body 64, and the connector member 65) of the pressing member 62 also move upward. The main body 62A of the pressing member 62 is in the upper position, and the lower end surface of the pressing piece 70, that is, the pressing surface 62S of the pressing member 62 is above the lower surface 9S of the upper spindle 9a and the lower surface of the permanent magnet 56. And is spaced upward from the upper surface 12S of the upper rim 12a.
また、図6に示す状態では、上リム12aは上スピンドル9aに装着されるとともに永久磁石56の磁力により上スピンドル9aに固定されている。また、下リム12bは下スピンドル9bに装着されるとともに前記永久磁石の磁力により下スピンドル9bに固定されている。図6に示す状態では、上下リム12a、12bは上下に間隔をおいて配置されている。
In the state shown in FIG. 6, the upper rim 12a is mounted on the upper spindle 9a and fixed to the upper spindle 9a by the magnetic force of the permanent magnet 56. The lower rim 12b is attached to the lower spindle 9b and is fixed to the lower spindle 9b by the magnetic force of the permanent magnet. In the state shown in FIG. 6, the upper and lower rims 12 a and 12 b are arranged at intervals in the vertical direction.
図7は、上リム12aが上スピンドル9aから取り外される時の状態を示している。図6に示す状態(タイヤ試験中の状態)から図7に示す取り外し時の状態に切り替えるために、コントローラ80の切替弁制御部81は、切替弁78が前記第1許容状態から第2許容状態に切り替わるように切替弁78の動作を制御する。
FIG. 7 shows a state when the upper rim 12a is removed from the upper spindle 9a. In order to switch from the state shown in FIG. 6 (the state during tire test) to the state at the time of removal shown in FIG. The operation of the switching valve 78 is controlled so as to switch to
具体的に、当該第2許容状態は、前記コンプレッサからの圧縮空気が上側のポート76に連通する上室73Uに供給されることを許容すると共に下側のポート77に連通する下室73Dから空気が排出されることを許容する。これにより、ピストン74により区画されるシリンダ室73の上室73Uのみにコンプレッサで圧縮された圧縮空気が供給され、ピストン74及びシリンダロッド75が下方に向かって移動する。このときのエアシリンダ61による下向きの押圧力は、永久磁石56が上リム12aを上スピンドル9aに引き寄せる力から上リム12aの重量を減算した値を上回っている。この下向きの押圧力はコネクタ部材65、棒体64、リング体67、及び押圧片70を介して上リム12aの上面12Sに伝達される。当該押圧力は、上リム12aを下方に向かって強く押圧する。このため、前記押圧部材62の本体部62Aは、図7に示す位置からさらに下方に移動し、前記下方位置に到達する。
Specifically, in the second permissible state, the compressed air from the compressor is allowed to be supplied to the upper chamber 73U that communicates with the upper port 76 and the air from the lower chamber 73D that communicates with the lower port 77. Is allowed to be discharged. Thereby, the compressed air compressed by the compressor is supplied only to the upper chamber 73U of the cylinder chamber 73 partitioned by the piston 74, and the piston 74 and the cylinder rod 75 move downward. The downward pressing force by the air cylinder 61 at this time exceeds the value obtained by subtracting the weight of the upper rim 12a from the force with which the permanent magnet 56 pulls the upper rim 12a toward the upper spindle 9a. The downward pressing force is transmitted to the upper surface 12S of the upper rim 12a through the connector member 65, the rod body 64, the ring body 67, and the pressing piece 70. The pressing force strongly presses the upper rim 12a downward. Therefore, the main body 62A of the pressing member 62 moves further downward from the position shown in FIG. 7 and reaches the lower position.
当該下方位置は、前記本体部62Aの前記押圧面62Sが前記上リム12aの前記上面12Sに対して前記下向きの押圧力を加えながら前記本体部62Aが当該下方位置に向かって下方に移動することにより前記上リム12aの前記上面12Sを前記上スピンドル9aの前記下面9Sから下方に離すことを可能にする位置である。したがって、前記本体部62Aが前記下方位置に到達すると、前記上リム12aの前記上面12Sは、前記上スピンドル9aの前記下面9Sに対して下方に距離をおいた位置に配置される。
In the lower position, the main body 62A moves downward toward the lower position while the pressing surface 62S of the main body 62A applies the downward pressing force to the upper surface 12S of the upper rim 12a. Thus, the upper surface 12S of the upper rim 12a can be separated downward from the lower surface 9S of the upper spindle 9a. Therefore, when the main body 62A reaches the lower position, the upper surface 12S of the upper rim 12a is disposed at a position spaced downward from the lower surface 9S of the upper spindle 9a.
前記下方位置が、前記本体部下限位置、すなわち、アクチュエータにおける下側のストロークエンドに対応する位置でない場合には、前記圧縮空気により生じる下向きの押圧力により、ピストン74及びシリンダロッド75がさらに下方に向かって移動し、前記本体部62Aは、前記本体部下限位置に到達する。これにより、上スピンドル9aから上リム12aが確実且つ迅速に離脱する。
When the lower position is not the main body lower limit position, that is, the position corresponding to the lower stroke end of the actuator, the piston 74 and the cylinder rod 75 are further moved downward by the downward pressing force generated by the compressed air. The main body 62A reaches the lower limit position of the main body. As a result, the upper rim 12a is reliably and quickly detached from the upper spindle 9a.
このようにして上スピンドル9aから離脱した上リム12aは、下リム12bの上に配置された状態で下スピンドル9bと共に下降する。これにより、上リム12aが上スピンドル9aから取り外される。そして、前記下スピンドル9bがさらに下降して下リム12bが前記リムテーブル13の上面に到達すると、当該下リム12bが下スピンドル9bから取り外され、前記リムテーブル13の上面に当該下リム12b及びこの上に重なる前記上リム12aが配置される。
The upper rim 12a detached from the upper spindle 9a in this way is lowered together with the lower spindle 9b while being arranged on the lower rim 12b. Thereby, the upper rim 12a is removed from the upper spindle 9a. When the lower spindle 9b is further lowered and the lower rim 12b reaches the upper surface of the rim table 13, the lower rim 12b is detached from the lower spindle 9b, and the lower rim 12b and the The upper rim 12a overlapping the upper side is arranged.
図5は、上リム12aが上スピンドル9aに対して装着される時の状態を示している。上リム12aが上スピンドル9aから取り外された状態で且つ前記押圧部材62の前記本体部62Aが図5に示す前記待機位置にある状態において、上リム12aを上スピンドル9aに装着するための制御が行われる。前記上リム12aが前記上スピンドル9aに装着される場合には、前記コントローラ80の切替弁制御部81は、前記上リム12aが前記上スピンドル9aから取り外された状態で前記切替弁78を前記阻止状態に切り替える制御を行う。これにより、前記本体部62Aが前記待機位置に配置される。
FIG. 5 shows a state when the upper rim 12a is mounted on the upper spindle 9a. When the upper rim 12a is detached from the upper spindle 9a and the main body 62A of the pressing member 62 is in the standby position shown in FIG. 5, control for mounting the upper rim 12a on the upper spindle 9a is performed. Done. When the upper rim 12a is mounted on the upper spindle 9a, the switching valve control unit 81 of the controller 80 blocks the switching valve 78 in a state where the upper rim 12a is detached from the upper spindle 9a. Control to switch to the state. Accordingly, the main body 62A is disposed at the standby position.
前記切替弁78が前記阻止状態に切り換わると、図5に示すように前記切替弁78は、上下双方のポート76、77が開放された状態になる。
When the switching valve 78 is switched to the blocking state, the switching valve 78 is in a state where both the upper and lower ports 76 and 77 are opened as shown in FIG.
前記切替弁78が図5に示す状態にある場合には、前記上室73U及び前記下室73Dの何れにも圧縮空気が供給されないので、前記上室73Uの空気圧と前記下室73Dの空気圧との差はほとんどない。しかも、前記上室73U及び前記下室73Dからの空気の排出が許容されているので、ピストン74はシリンダ室73内を上方にも下方にも移動可能である。前記本体部62Aが図5に示す待機位置に配置されているとき、前記第1のばね体63aによる下向きの押圧力(弾性力)は押圧部材62の前記本体部62Aに作用していることが好ましいが、このことは必須ではない。すなわち、上述したように、前記待機位置が前記下方位置よりもさらに下方にある場合には、前記本体部62Aが前記待機位置に配置されているときに前記第1のばね体63aによる下向きの押圧力は必ずしも前記本体部62Aに作用していなくてもよく、前記本体部62Aが前記待機位置よりも上方の前記下方位置に配置されているときに前記第1のばね体63aによる下向きの押圧力が前記本体部62Aに作用していればよい。当該第1のばね体63aの押圧力(弾性力)は、新たに上リム12aを上スピンドル9aに装着する際の衝撃を緩和することを可能にする。
When the switching valve 78 is in the state shown in FIG. 5, since compressed air is not supplied to either the upper chamber 73U or the lower chamber 73D, the air pressure of the upper chamber 73U and the air pressure of the lower chamber 73D There is almost no difference. In addition, since the discharge of air from the upper chamber 73U and the lower chamber 73D is allowed, the piston 74 can move in the cylinder chamber 73 upward and downward. When the main body 62A is disposed at the standby position shown in FIG. 5, the downward pressing force (elastic force) by the first spring body 63a acts on the main body 62A of the pressing member 62. Although preferred, this is not essential. That is, as described above, when the standby position is further below the lower position, the first spring body 63a pushes downward when the main body 62A is disposed at the standby position. The pressure does not necessarily have to act on the main body 62A, and the downward pressing force by the first spring body 63a when the main body 62A is arranged at the lower position above the standby position. May act on the main body 62A. The pressing force (elastic force) of the first spring body 63a makes it possible to relieve an impact when the upper rim 12a is newly attached to the upper spindle 9a.
上記のように、図5に示すリム交換機構50の状態は、上リム12aが上スピンドル9aに装着されるのを待機する待機状態である。当該待機状態では、前記本体部62Aが前記待機位置に配置され、押圧片70の下端面(すなわち、押圧部材62の本体部62Aの下面62S)がフランジ部55の下面9Sよりも下方に突出している。このように前記待機状態において前記本体部62Aの前記下面62Sが前記上スピンドル9aの下面9Sよりも下方に位置するように弾性部63のバネ定数が設定される。
As described above, the state of the rim replacement mechanism 50 shown in FIG. 5 is a standby state for waiting for the upper rim 12a to be mounted on the upper spindle 9a. In the standby state, the main body portion 62A is disposed at the standby position, and the lower end surface of the pressing piece 70 (that is, the lower surface 62S of the main body portion 62A of the pressing member 62) protrudes below the lower surface 9S of the flange portion 55. Yes. Thus, in the standby state, the spring constant of the elastic portion 63 is set so that the lower surface 62S of the main body 62A is positioned below the lower surface 9S of the upper spindle 9a.
具体的には、当該ばね体63a,63bのバネ定数やばね体63a,63bの長さは、例えば上述した条件1~条件3を考慮して設定される。
Specifically, the spring constants of the spring bodies 63a and 63b and the lengths of the spring bodies 63a and 63b are set in consideration of, for example, the conditions 1 to 3 described above.
本実施形態では、上述したように、前記弾性部63は、中間部材68の下側に配置される第1のばね体63aと、中間部材68の上側に配置される第2のばね体63bとを含む。このように複数のばね体63a,63bを、位置が固定されている中間部材68を介して上下に分けて配置することにより、弾性部63によるバネ力の働く方向を上下2方向に作用させることが可能になる。また、それぞれのばね体の長さの調整などによる前記弾性部63のバネ力の調節が可能になるので、設計の自由度が確保される。
In the present embodiment, as described above, the elastic portion 63 includes the first spring body 63 a disposed below the intermediate member 68 and the second spring body 63 b disposed above the intermediate member 68. including. In this way, by arranging the plurality of spring bodies 63a and 63b separately in the vertical direction via the intermediate member 68 whose position is fixed, the direction in which the spring force acts by the elastic portion 63 acts in two vertical directions. Is possible. In addition, since the spring force of the elastic portion 63 can be adjusted by adjusting the length of each spring body, a degree of freedom in design is ensured.
このような待機状態(図5に示す状態)のリム交換機構50において、上リム12a及び下リム12bを上端部に載せた下スピンドル9bが上昇し、上リム12aの上面12Sが永久磁石56の磁力による前記影響範囲に含まれるような位置まで上リム12aが前記永久磁石56に接近すると、永久磁石56の磁力が上リム12aに作用し、上リム12aが上スピンドル9aに向かって上方に引き寄せられる。
In the rim exchanging mechanism 50 in such a standby state (the state shown in FIG. 5), the lower spindle 9b with the upper rim 12a and the lower rim 12b placed on the upper end rises, and the upper surface 12S of the upper rim 12a When the upper rim 12a approaches the permanent magnet 56 to a position that is included in the range affected by the magnetic force, the magnetic force of the permanent magnet 56 acts on the upper rim 12a, and the upper rim 12a is drawn upward toward the upper spindle 9a. It is done.
前記待機状態では、押圧片70の下端面62S、すなわち、押圧部材62の本体部62Aの下面62Sがフランジ部55の下面9Sよりも下方に位置しているので、磁力により上スピンドル9aに引き寄せられる上リム12aの上面12Sは、フランジ部55の下面9Sよりも先に押圧部材62の本体部62Aの下面62Sに接触する。この接触時に前記待機位置にある前記本体部62Aは、前記磁力により前記上リム12aが上スピンドル9aの前記下面9Sに近づくように上昇するのに伴って上昇する。このとき、前記本体部62Aには、前記第1のばね体63aの押圧力が下方に作用するため、上リム12aの上面12Sが上スピンドル9aの下面9Sに接するときの衝撃は、前記第1のばね体63aが縮むことにより緩和される。これにより、磁着面(密着面)である前記上面12S及び前記下面9Sに傷が形成されることや大きな衝撃音が発生することなどが抑制される。すなわち、上リム12aの上面12Sが前記本体部62Aの下面62Sに接触してから前記上スピンドル9aのフランジ部55の下面9Sに接触するまでの過程のうちの少なくとも一部の時間帯において、上リム12aは前記第1のばね体63aによる下向きの押圧力を受けるので、上リム12aが上スピンドル9aに装着されるときの衝撃が緩和される。
In the standby state, the lower end surface 62S of the pressing piece 70, that is, the lower surface 62S of the main body portion 62A of the pressing member 62 is positioned below the lower surface 9S of the flange portion 55, so that it is attracted to the upper spindle 9a by magnetic force. The upper surface 12S of the upper rim 12a contacts the lower surface 62S of the main body portion 62A of the pressing member 62 prior to the lower surface 9S of the flange portion 55. The main body 62A in the standby position at the time of contact rises as the upper rim 12a rises so as to approach the lower surface 9S of the upper spindle 9a by the magnetic force. At this time, since the pressing force of the first spring body 63a acts downward on the main body portion 62A, the impact when the upper surface 12S of the upper rim 12a comes into contact with the lower surface 9S of the upper spindle 9a is reduced. The spring body 63a is relaxed by contraction. As a result, it is possible to suppress the formation of scratches on the upper surface 12S and the lower surface 9S, which are magnetized surfaces (contact surfaces), and the generation of a large impact sound. That is, in at least part of the time period from when the upper surface 12S of the upper rim 12a contacts the lower surface 62S of the main body 62A until it contacts the lower surface 9S of the flange portion 55 of the upper spindle 9a, Since the rim 12a receives a downward pressing force by the first spring body 63a, the impact when the upper rim 12a is attached to the upper spindle 9a is reduced.
このようにして上リム12aが上スピンドル9aに固定されると、リム交換機構50は、再び図6に示す状態に切り替わる。かかる状態では、ピストン74が上方に移動し、押圧片70が上リム12aの上面12Sから上方に離れる。この図6に示す状態は、タイヤ試験が可能な状態である。図6に示す状態からリム交換機構50によって上リム12aが取り外される手順は上述した通りである。
When the upper rim 12a is fixed to the upper spindle 9a in this way, the rim replacement mechanism 50 is switched again to the state shown in FIG. In such a state, the piston 74 moves upward, and the pressing piece 70 moves away from the upper surface 12S of the upper rim 12a. The state shown in FIG. 6 is a state where a tire test is possible. The procedure for removing the upper rim 12a by the rim replacement mechanism 50 from the state shown in FIG. 6 is as described above.
本実施形態に係るリム交換機構50においては、エアシリンダ61やこのエアシリンダ61を支えるブラケットが上スピンドル9aと一体に回転しないように上部フレーム52aに固定されている。すなわち、リム交換機構50は、上スピンドル9aの回転とともに回転しない構造を有する。したがって、タイヤ試験において、リム交換機構50の回転に起因する誤差成分がユニフォミティの計測系に加わることが抑制される。その結果、ユニフォミティを精度良く計測できる。
In the rim replacement mechanism 50 according to the present embodiment, the air cylinder 61 and the bracket that supports the air cylinder 61 are fixed to the upper frame 52a so as not to rotate integrally with the upper spindle 9a. That is, the rim replacement mechanism 50 has a structure that does not rotate with the rotation of the upper spindle 9a. Therefore, in the tire test, an error component due to the rotation of the rim replacement mechanism 50 is suppressed from being added to the uniformity measurement system. As a result, the uniformity can be measured with high accuracy.
本実施形態に係るリム交換機構50(リム離脱機構51)は、上スピンドル9aに対して上リム12aを装着する際に様々な悪影響が生じることを抑制できる。
The rim exchanging mechanism 50 (rim removing mechanism 51) according to the present embodiment can suppress various adverse effects when the upper rim 12a is mounted on the upper spindle 9a.
具体的には、リム交換機構50において、押圧部材62の本体部62Aに下向きの押圧力が加わるように棒体64の長さとばね体63a,63bの長さと前記中間部材68の位置が調節されている。このため、上リム12aが上スピンドル9aに装着される時の衝撃力を前記弾性部63が緩和し、上リム12aの上面12S及び上スピンドル9aの下面9Sにおける傷つきや衝撃音が緩和される。
Specifically, in the rim replacement mechanism 50, the length of the rod body 64, the lengths of the spring bodies 63a and 63b, and the position of the intermediate member 68 are adjusted so that a downward pressing force is applied to the main body portion 62A of the pressing member 62. ing. For this reason, the elastic portion 63 relaxes the impact force when the upper rim 12a is mounted on the upper spindle 9a, and scratches and impact sounds on the upper surface 12S of the upper rim 12a and the lower surface 9S of the upper spindle 9a are alleviated.
さらに、前記待機状態においては、エアシリンダ61の両ポート76、77が共に開放されるようなエア回路が構成される。すなわち、前記待機状態においては、エアシリンダ61のシリンダロッド75の伸縮が自在である。この待機状態において、上リム12aが上スピンドル9aに装着されたことを前記第1センサが検知すると、その信号が入力されるコントローラ80は、エアシリンダ61のピストン74が上昇するように前記切替弁78の動作を制御する。そして、エアシリンダ61のピストン74が上限位置に達したことを前記第2センサが検知すると、その信号が入力されるコントローラ80は、下スピンドル9bが下降するように前記昇降シリンダ72の動作を制御する。これにより、上リム12a及び下リム12bが上スピンドル9a及び下スピンドル9bにそれぞれ迅速に固定される。
Furthermore, in the standby state, an air circuit is configured in which both ports 76 and 77 of the air cylinder 61 are opened. That is, in the standby state, the cylinder rod 75 of the air cylinder 61 can freely expand and contract. In this standby state, when the first sensor detects that the upper rim 12a is mounted on the upper spindle 9a, the controller 80 to which the signal is input causes the switching valve so that the piston 74 of the air cylinder 61 is raised. The operation of 78 is controlled. When the second sensor detects that the piston 74 of the air cylinder 61 has reached the upper limit position, the controller 80 to which the signal is input controls the operation of the elevating cylinder 72 so that the lower spindle 9b is lowered. To do. Thereby, the upper rim 12a and the lower rim 12b are quickly fixed to the upper spindle 9a and the lower spindle 9b, respectively.
上リム12aの上面12Sを押圧する前記押圧部材62の押圧面62Sは、タイヤ試験に用いられる上リム12aのうち、最小径の上リム12aから最大径の上リム12aまでの範囲に含まれるいずれのサイズを有する上リム12aであっても押圧可能な位置に配置されている。本実施形態では、図6に示すように、リング体67の下面に当該下面から下方に延びる押圧片70(リム12押し部材)が設けられている。このことは、前記押圧面62Sが前記上リム12aの上面12Sを押圧する位置が径方向の小さな範囲に限られたとしても、前記押圧面62Sが前記上リム12aの上面12Sを適切に押圧することを可能にし、しかも、エアシリンダ61の取付位置が制限されたとしても、前記押圧面62Sが前記上リム12aの上面12Sを適切に押圧することを可能にする。
The pressing surface 62S of the pressing member 62 that presses the upper surface 12S of the upper rim 12a is included in any of the upper rims 12a used in the tire test included in the range from the upper rim 12a having the smallest diameter to the upper rim 12a having the largest diameter. Even the upper rim 12a having the size is arranged at a position where it can be pressed. In the present embodiment, as shown in FIG. 6, a pressing piece 70 (rim 12 pressing member) extending downward from the lower surface is provided on the lower surface of the ring body 67. This means that even if the position where the pressing surface 62S presses the upper surface 12S of the upper rim 12a is limited to a small radial range, the pressing surface 62S appropriately presses the upper surface 12S of the upper rim 12a. In addition, even if the mounting position of the air cylinder 61 is limited, the pressing surface 62S can appropriately press the upper surface 12S of the upper rim 12a.
図6に示すように、前記弾性部63は、中間部材68を介して上側の第2のばね体63bと下側の第1のばね体63aに分かれている。このことは、押圧部材62の前記本体部62Aを押圧するばね体63a,63bのバネ定数を調整する自由度を高めることを可能にする。加えて、図6に示すように、コネクタ部材65には、前記シリンダロッド75の下端部が当該コネクタ部材65に対して上下方向に相対移動可能となるような遊びが設けられている。この遊びは、エアシリンダ61のシリンダロッド75のストロークよりも前記押圧部材62の移動量を小さくする(短くする)ために設けられたものである。
As shown in FIG. 6, the elastic portion 63 is divided into an upper second spring body 63 b and a lower first spring body 63 a through an intermediate member 68. This makes it possible to increase the degree of freedom for adjusting the spring constants of the spring bodies 63a and 63b that press the main body portion 62A of the pressing member 62. In addition, as shown in FIG. 6, the connector member 65 is provided with a play that allows the lower end portion of the cylinder rod 75 to move relative to the connector member 65 in the vertical direction. This play is provided in order to make the movement amount of the pressing member 62 smaller (shorter) than the stroke of the cylinder rod 75 of the air cylinder 61.
また、上述したように、前記リムテーブル13の前記リム搭載面の上には、互いに異なるサイズを有する前記複数のリム12が載置される。すなわち、本実施形態では、互いに異なるサイズと重量を有する前記複数の上リム12aの何れかを上スピンドル9aに装着することが可能である。そして、前記上リム12aが前記上スピンドル9aに装着された状態において前記第1のばね体63aが前記本体部62Aに対して加える前記下向きの押圧力は、前記永久磁石56による磁力から、前記上スピンドル9aに装着可能な前記複数の上リム12aのうち最大の重量を有する上リム12aの重量を減算した値より小さくなるように設定されている。
Further, as described above, the plurality of rims 12 having different sizes are placed on the rim mounting surface of the rim table 13. That is, in this embodiment, any one of the plurality of upper rims 12a having different sizes and weights can be mounted on the upper spindle 9a. The downward pressing force applied to the main body 62A by the first spring body 63a in a state where the upper rim 12a is mounted on the upper spindle 9a It is set to be smaller than a value obtained by subtracting the weight of the upper rim 12a having the maximum weight among the plurality of upper rims 12a that can be mounted on the spindle 9a.
以上述べたように、本実施形態に係るタイヤ試験機1におけるリム交換機構50は、リム離脱機構51を有しており、このリム離脱機構51の押圧部材62が前記弾性部63を含むため、上スピンドル9aに対して上リム12aを装着する際の様々な悪影響が生じることを抑制することが可能となる。
As described above, the rim replacement mechanism 50 in the tire testing machine 1 according to the present embodiment has the rim separation mechanism 51, and the pressing member 62 of the rim separation mechanism 51 includes the elastic portion 63. It is possible to suppress various adverse effects when the upper rim 12a is mounted on the upper spindle 9a.
なお、上記のように前記上リムが前記上スピンドルに接触するときの衝撃に関する問題に対して、タイヤ試験機において、リム離脱機構として油圧シリンダ(油圧ジャッキ)を採用し、当該油圧シリンダを衝撃緩和に利用するという対応策が考えられる。すなわち、当該対応策に係るタイヤ試験機は、上スピンドルから上リムを取り外すためのリム離脱機構を備え、当該リム離脱機構は、上部フレームに垂下状態で設けられて下向きに押圧力を発生する油圧シリンダと、この油圧シリンダの押圧力を用いて上リムを押圧する下端部を有する押圧部材と、を備えている。つまり、当該タイヤ試験機では、このリム離脱機構の油圧シリンダが、上リムの磁着時における衝撃緩和のための手段としても使用される。
As described above, the tire testing machine employs a hydraulic cylinder (hydraulic jack) as a rim detaching mechanism to reduce the impact of the upper rim when it comes into contact with the upper spindle. A possible countermeasure is to use it. That is, the tire testing machine according to the countermeasure includes a rim detaching mechanism for removing the upper rim from the upper spindle, and the rim detaching mechanism is provided in a suspended state on the upper frame, and generates hydraulic pressure downward. A cylinder and a pressing member having a lower end that presses the upper rim using the pressing force of the hydraulic cylinder. That is, in the tire testing machine, the hydraulic cylinder of the rim separation mechanism is also used as a means for reducing the impact when the upper rim is magnetically attached.
具体的には、上リムの交換時に上リムが取り外され、別の上リムが上スピンドルに装着されるまで油圧シリンダを下方に伸長させ、押圧部材を下側へ押し出す(リム押し操作)。この状態で、上リムを上スピンドルに磁着させた場合、油圧シリンダの下方への押圧力と下スピンドルの上昇力との差により、油圧シリンダが押し戻される時のクッション効果を利用して、上リム装着時の衝撃力が緩和される。また、上リムが上スピンドルに装着された後は、センサで上リムが確実に装着されたことを検知して油圧ジャッキの圧力が抜かれ、下スピンドルが下降することによりリムの交換動作が終了する。
Specifically, when replacing the upper rim, the upper rim is removed, and the hydraulic cylinder is extended downward until another upper rim is mounted on the upper spindle, and the pressing member is pushed downward (rim pressing operation). When the upper rim is magnetically attached to the upper spindle in this state, the upper rim is lifted by utilizing the cushion effect when the hydraulic cylinder is pushed back due to the difference between the downward pressing force of the hydraulic cylinder and the lifting force of the lower spindle. The impact force when the rim is installed is reduced. After the upper rim is mounted on the upper spindle, the sensor detects that the upper rim has been securely mounted, the pressure of the hydraulic jack is released, and the lower spindle moves down to complete the rim replacement operation. .
上記のような動作を行うことで、上リムの装着時の課題(例えば、衝撃音の発生)などを解消可能である。しかし、この対応策では、以下に示す課題が生じることがある。例えば、上記した油圧シリンダの動作(上リムの磁着時における課題解決のための動作)は、自動リムチェンジにおける一連の動作に含まれる動作である。しかし、リムの交換作業が手動操作によって行われる場合がある。かかる場合においては、例えば、前記リム押し操作と前記下スピンドルの上昇操作とが個別に行われる手動操作においては、前記リム押し操作が行われていない状態で、上下リムを搭載した下スピンドルを上昇させる操作が行われることがある。この場合、上リムが上スピンドルに装着されるときの衝撃が緩和されない。
By performing the operation as described above, it is possible to solve problems when the upper rim is mounted (for example, generation of impact sound). However, this countermeasure may have the following problems. For example, the above-described operation of the hydraulic cylinder (operation for solving the problem when the upper rim is magnetized) is included in a series of operations in the automatic rim change. However, the rim replacement operation may be performed manually. In such a case, for example, in the manual operation in which the rim pushing operation and the lower spindle raising operation are individually performed, the lower spindle on which the upper and lower rims are mounted is raised without the rim pushing operation being performed. Operation may be performed. In this case, the impact when the upper rim is mounted on the upper spindle is not relieved.
また、上スピンドルに上リムが装着されていることを検知するためのセンサが設けられる場合がある。当該センサが上リムを検知していない場合には、上スピンドルから上リムを取り外す動作が行われない。しかし、上リムを検知するための前記センサが何らかの原因で誤作動し、上リムが上スピンドルに装着されているにもかかわらず、上リムが装着されていないと判断され、前記油圧シリンダが上リムを下方へ押す動作が行われた結果、リムが落ちるといった問題が発生する虞がある。すなわち、油圧シリンダが、上リムの離脱と上リムの装着時の衝撃緩衝という2つの機能を達成するために利用されている場合には、この兼用動作に起因する上記の種々の問題は完全に解決されない。また、前記対応策では、上リムが上スピンドルに確実に密着したことをセンサが検知したのち、油圧シリンダの圧力が抜かれ、圧力が十分抜けきる時間がタイマでカウントされる。このような対応策では、前記圧力が抜けるまでに長い時間がかかり、下スピンドルが所定の位置まで下降して動作が完了するまで長い時間がかかるという問題もある。
Also, a sensor may be provided for detecting that the upper rim is mounted on the upper spindle. When the sensor does not detect the upper rim, the operation of removing the upper rim from the upper spindle is not performed. However, the sensor for detecting the upper rim malfunctions for some reason, and it is determined that the upper rim is not mounted even though the upper rim is mounted on the upper spindle. As a result of the operation of pushing the rim downward, there is a risk that the rim will fall. That is, when the hydraulic cylinder is used to achieve the two functions of detachment of the upper rim and shock buffering when the upper rim is mounted, the above-described various problems caused by this combined operation are completely eliminated. It is not solved. In the above countermeasure, after the sensor detects that the upper rim is securely attached to the upper spindle, the pressure of the hydraulic cylinder is released, and the time for which the pressure is sufficiently released is counted by a timer. Such countermeasures also have a problem that it takes a long time for the pressure to release, and it takes a long time for the lower spindle to descend to a predetermined position and complete the operation.
なお、今回開示された実施形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明は、例えば次のような態様を含むことが可能である。
In addition, it should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The present invention can include, for example, the following aspects.
(A)前記実施形態では、例えば図5に示すように、中間部材68を介して第1のばね体63aと第2のばね体63bとが配置されていたが、本発明は、この実施形態に限られない。例えば、図5において、前記弾性部63は、第1のばね体63aを有する一方で、第2のばね体63bを有していないものであってもよい。この場合、前記本体部62Aが前記本体部下限位置に配置されているときには、当該本体部62Aは、例えば、エアシリンダ61のシリンダロッド75の下端部により支持されてもよく、また、コネクタ部材65の下面が中間部材68の上面に接することにより支持されてもよい。
(A) In the embodiment described above, for example, as shown in FIG. 5, the first spring body 63a and the second spring body 63b are arranged via the intermediate member 68. However, the present invention is not limited to this embodiment. Not limited to. For example, in FIG. 5, the elastic portion 63 may include a first spring body 63a but not a second spring body 63b. In this case, when the main body portion 62A is disposed at the lower limit position of the main body portion, the main body portion 62A may be supported by, for example, the lower end portion of the cylinder rod 75 of the air cylinder 61, and the connector member 65. The lower surface of the intermediate member 68 may be supported by contacting the upper surface of the intermediate member 68.
(B)前記実施形態では、例えば図5に示すように、前記リム交換機構50が支持部材(中間部材68)を備えていたが、本発明は、この実施形態に限られない。例えば、図5において、前記支持部材(中間部材68)を省略し、前記弾性部63が少なくとも一つの第1のばね体63aのみからなるものであってもよい。この場合、例えば、棒体64の下端部は、前記下部構造体のリング体67に固定される一方で、棒体64の上端部は、上側部材(コネクタ部材65)に設けられた貫通孔に挿通されていてもよい。この構成では、本体部62Aが上下方向に昇降するときに、棒体64が前記コネクタ部材65に対して上下方向に相対移動可能となる。
(B) In the above embodiment, for example, as shown in FIG. 5, the rim replacement mechanism 50 includes a support member (intermediate member 68), but the present invention is not limited to this embodiment. For example, in FIG. 5, the support member (intermediate member 68) may be omitted, and the elastic portion 63 may be composed of only at least one first spring body 63a. In this case, for example, the lower end portion of the rod body 64 is fixed to the ring body 67 of the lower structure, while the upper end portion of the rod body 64 is a through hole provided in the upper member (connector member 65). It may be inserted. In this configuration, the rod body 64 can be moved relative to the connector member 65 in the vertical direction when the main body 62A moves up and down in the vertical direction.
(C)前記実施形態では、永久磁石56の磁力による前記影響範囲に含まれるような位置まで上リム12aが前記永久磁石56に接近すると、その磁力により上リム12aが上スピンドル9aに引き寄せられ、その後、上リム12aの上面12Sがフランジ部55の下面9Sよりも先に押圧部材62の本体部62Aの下面62Sに接触する。本発明では、このような実施形態に限られない。例えば、上昇する前記上リム12aの上面12Sが押圧部材62の本体部62Aの下面62Sに接触した後に、当該上リム12aがさらに上昇することにより、前記磁力により前記上スピンドル9aに引き寄せられるような形態であってもよい。
(C) In the embodiment, when the upper rim 12a approaches the permanent magnet 56 to a position that is included in the range of influence by the magnetic force of the permanent magnet 56, the upper rim 12a is attracted to the upper spindle 9a by the magnetic force, Thereafter, the upper surface 12S of the upper rim 12a comes into contact with the lower surface 62S of the main body portion 62A of the pressing member 62 before the lower surface 9S of the flange portion 55. The present invention is not limited to such an embodiment. For example, after the upper surface 12S of the rising upper rim 12a comes into contact with the lower surface 62S of the main body 62A of the pressing member 62, the upper rim 12a is further lifted so that the magnetic force attracts the upper spindle 9a. Form may be sufficient.
特に、今回開示された実施形態において、明示的に開示されていない事項、例えば、運転条件や操業条件、各種パラメータ、構成物の寸法、重量、体積などは、当業者が通常実施する範囲を逸脱するものではなく、通常の当業者であれば、容易に想定することが可能な値を採用している。
In particular, in the embodiment disclosed this time, matters that are not explicitly disclosed, for example, operating conditions and operating conditions, various parameters, dimensions, weights, volumes, and the like of a component deviate from a range that a person skilled in the art normally performs. Instead, values that can be easily assumed by those skilled in the art are employed.
上記のように、本発明は、上スピンドルに対して上リムを装着する際に上リムが上スピンドルに接触するときの衝撃を緩和することが可能なタイヤ試験機のリム交換機構及びリム交換方法を提供することを目的とする。
As described above, the present invention provides a rim exchanging mechanism and a rim exchanging method for a tire testing machine that can alleviate the impact when the upper rim contacts the upper spindle when the upper rim is mounted on the upper spindle. The purpose is to provide.
提供されるのは、タイヤ試験機のリム交換機構である。当該リム交換機構は、タイヤ試験機に設けられる。当該タイヤ試験機は、タイヤを挟持するための複数のリムであって当該複数のリムのそれぞれが上リム及び下リムを有するものと、前記複数のリムから選ばれる何れかのリムの前記上リムが装着されること及び取り外されることが可能な上スピンドルであって当該上スピンドルに装着された前記上リムの上面に接する下面を有するとともに前記上スピンドルに装着された前記上リムを磁力により当該上スピンドルに固定するための永久磁石を有する上スピンドルと、前記下リムが装着される下スピンドルと、を備える。前記リム交換機構は、前記上スピンドルに固定された前記上リムを交換するための機構である。当該リム交換機構は、前記上リムの前記上面に対して下向きの押圧力を加えるための押圧面を有する本体部とばね体とを含む押圧部材と、前記本体部を上方位置と下方位置とを含む範囲において上下方向に変位させるアクチュエータと、を備える。前記上方位置は、前記上スピンドルに装着された前記上リムの前記上面よりも前記本体部の前記押圧面が上方に位置する位置である。前記下方位置は、前記上方位置よりも下方の位置であり、前記本体部の前記押圧面が前記上リムの前記上面に対して前記下向きの押圧力を加えながら前記本体部が当該下方位置に向かって下方に移動することにより前記上リムの前記上面を前記上スピンドルの前記下面から下方に離すことを可能にする位置である。前記ばね体は、前記下方位置に配置される前記本体部に対して下向きの押圧力を加えるように構成されている。
Provided is a rim replacement mechanism for tire testing machines. The rim replacement mechanism is provided in the tire testing machine. The tire testing machine includes a plurality of rims for sandwiching a tire, each of the rims having an upper rim and a lower rim, and the upper rim of any rim selected from the plurality of rims. An upper spindle that can be mounted and removed, and has a lower surface in contact with the upper surface of the upper rim mounted on the upper spindle, and the upper rim mounted on the upper spindle is magnetically An upper spindle having a permanent magnet for fixing to the spindle, and a lower spindle to which the lower rim is attached. The rim exchange mechanism is a mechanism for exchanging the upper rim fixed to the upper spindle. The rim replacement mechanism includes a pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body, and the main body portion in an upper position and a lower position. And an actuator that is displaced in the vertical direction within a range to include. The upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle. The lower position is a position below the upper position, and the main body portion faces the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim. The upper surface of the upper rim can be moved downward from the lower surface of the upper spindle by moving downward. The spring body is configured to apply a downward pressing force to the main body disposed at the lower position.
このタイヤ試験機のリム交換機構では、上下のリム及び上下のスピンドルの回転を伴うタイヤ試験が行われる場合には、前記アクチュエータにより前記押圧部材の前記本体部が前記上方位置に配置される。前記本体部が当該上方位置に配置されると、前記上スピンドルに装着された前記上リムの前記上面よりも前記本体部の前記押圧面が上方に位置するので、前記押圧部材の本体部が前記上リム及び前記上スピンドルの回転を阻害しない。また、前記上スピンドルに固定された上リムを別の上リムに交換するために上リムが上スピンドルから取り外される場合には、前記アクチュエータにより前記押圧部材の前記本体部が下方に移動して前記下方位置又は当該下方位置よりも下方の位置(例えば前記待機位置)に配置される。このことは、前記本体部の前記押圧面が前記上リムの前記上面に対して前記下向きの押圧力を加えながら前記本体部が当該下方位置に移動することにより前記上リムの前記上面を前記上スピンドルの前記下面から下方に離すことを可能にする。さらに、前記別の上リムが前記上スピンドルに装着される場合には、前記本体部が前記待機位置に配置された状態で前記上スピンドルよりも下方にある前記別の上リムが前記上スピンドルに近づけられる。そして、当該上リムは、前記上スピンドルにおける永久磁石の磁力の影響を十分に受ける距離まで近づくと、当該磁力により引き寄せられて前記上スピンドルに向かって移動する。この移動過程において、前記本体部が前記待機位置に配置されている場合には、前記上リムの前記上面は前記上スピンドルの前記下面よりも先に前記本体部の前記押圧面に接触する。そして、前記リム交換機構では、前記ばね体は、前記下方位置に配置される前記本体部に対して下向きの押圧力を加えるように構成されている。このばね体による前記下向きの押圧力によって前記本体部及び上リムの上方への移動速度が抑えられる。このことは、前記上リムの前記上面が前記上スピンドルの前記下面に接するときの衝撃が前記ばね体による前記下向きの押圧力により緩和されることを可能にする。
In the rim exchanging mechanism of the tire testing machine, when a tire test involving rotation of the upper and lower rims and the upper and lower spindles is performed, the main body portion of the pressing member is disposed at the upper position by the actuator. When the main body portion is disposed at the upper position, the pressing surface of the main body portion is located above the upper surface of the upper rim mounted on the upper spindle. It does not hinder the rotation of the upper rim and the upper spindle. When the upper rim is removed from the upper spindle in order to replace the upper rim fixed to the upper spindle with another upper rim, the actuator moves the body portion of the pressing member downward to It is arranged at a lower position or a position below the lower position (for example, the standby position). This is because the upper surface of the upper rim is moved upward by the main body moving to the lower position while the pressing surface of the main body applies a downward pressing force to the upper surface of the upper rim. It is possible to move downward from the lower surface of the spindle. Further, when the other upper rim is mounted on the upper spindle, the other upper rim located below the upper spindle in a state where the main body portion is disposed at the standby position is attached to the upper spindle. It can be approached. When the upper rim approaches a distance that is sufficiently affected by the magnetic force of the permanent magnet in the upper spindle, the upper rim is attracted by the magnetic force and moves toward the upper spindle. In this movement process, when the main body is disposed at the standby position, the upper surface of the upper rim contacts the pressing surface of the main body before the lower surface of the upper spindle. In the rim replacement mechanism, the spring body is configured to apply a downward pressing force to the main body portion disposed at the lower position. Due to the downward pressing force of the spring body, the moving speed of the main body and the upper rim upward is suppressed. This enables the impact when the upper surface of the upper rim contacts the lower surface of the upper spindle to be mitigated by the downward pressing force by the spring body.
前記タイヤ試験機のリム交換機構において、前記上スピンドルは、前記タイヤ試験機のフレームに対して回転自在に支持され、前記アクチュエータは、前記フレームに対して固定されていることが好ましい。仮に、前記アクチュエータが上スピンドルに固定されて当該上スピンドルの回転とともに回転する場合には、前記アクチュエータの回転に起因する誤差成分がタイヤ試験の計測結果に加わるので、タイヤ試験の精度が低下する。一方、本態様では、前記アクチュエータは、上スピンドルに固定されるのではなく前記フレームに固定されているので、前記上スピンドルが回転しても当該アクチュエータは回転しない。このことは、タイヤ試験において、前記アクチュエータの回転に起因する誤差成分がタイヤ試験の計測結果に加わることを抑制できる。これにより、タイヤ試験の精度が低下するのを抑制できる。
In the rim exchanging mechanism of the tire testing machine, it is preferable that the upper spindle is rotatably supported with respect to the frame of the tire testing machine, and the actuator is fixed to the frame. If the actuator is fixed to the upper spindle and rotates with the rotation of the upper spindle, an error component due to the rotation of the actuator is added to the measurement result of the tire test, so that the accuracy of the tire test is lowered. On the other hand, in this aspect, since the actuator is not fixed to the upper spindle but fixed to the frame, the actuator does not rotate even if the upper spindle rotates. This can suppress an error component due to rotation of the actuator from being added to the measurement result of the tire test in the tire test. Thereby, it can suppress that the precision of a tire test falls.
前記タイヤ試験機のリム交換機構において、前記ばね体は、上下方向に伸縮するように構成され、前記押圧部材の前記本体部は、上下方向に前記ばね体を貫通し当該ばね体を支持する棒体を含んでいることが好ましい。この態様では、上下方向に伸縮するように構成されたばね体が上下方向に前記ばね体を貫通する前記棒体により支持されるので、前記ばね体が上下方向以外の方向に変形することが抑制される。このことは、前記ばね体が前記本体部に加える下向きの押圧力がばらつくことを抑制する。
In the rim exchanging mechanism of the tire testing machine, the spring body is configured to expand and contract in the vertical direction, and the main body portion of the pressing member penetrates the spring body in the vertical direction and supports the spring body. It preferably contains a body. In this aspect, since the spring body configured to expand and contract in the vertical direction is supported by the rod body penetrating the spring body in the vertical direction, the spring body is prevented from being deformed in directions other than the vertical direction. The This suppresses variation in downward pressing force applied by the spring body to the main body.
前記タイヤ試験機のリム交換機構において、前記アクチュエータは、シリンダ室を画定するシリンダ本体と、前記シリンダ室に収容されて前記シリンダ室を上室と下室とに区画するピストンであって前記シリンダ室において上下方向に昇降可能なピストンと、を有するエアシリンダであり、前記本体部は、前記ピストンが上下方向に昇降するのに伴って上下方向に変位するように構成されていてもよい。この態様では、前記本体部の上下方向の変位が前記エアシリンダにより達成される。
In the rim replacement mechanism of the tire testing machine, the actuator includes a cylinder body that defines a cylinder chamber, and a piston that is accommodated in the cylinder chamber and divides the cylinder chamber into an upper chamber and a lower chamber, and the cylinder chamber The main body may be configured to be displaced in the vertical direction as the piston moves up and down in the vertical direction. In this aspect, the vertical displacement of the main body is achieved by the air cylinder.
前記タイヤ試験機のリム交換機構は、前記シリンダ本体との相対位置が一定である支持部材であって前記ばね体の一端部を支持する支持部材をさらに備え、前記押圧部材の前記本体部は、前記ばね体の他端部を支持し、前記ばね体は、前記支持部材に対する前記本体部の上下方向の相対位置が変化するのに伴って上下方向に伸縮するように構成されていてもよい。この態様では、前記ばね体の一端部は、前記シリンダ本体との相対位置が不変である支持部材に支持され、前記ばね体の他端部は、前記シリンダ本体との相対位置がピストンの上下方向の昇降に伴って変化する前記本体部に支持されている。したがって、前記ばね体は、前記支持部材に対する前記本体部の上下方向の相対位置が変化するのに伴って上下方向に伸縮する。このことは、前記のような支持部材を設けるという簡単な構成で、前記上リムの前記上面が前記上スピンドルの前記下面に接するときの衝撃を緩和することを可能にする。
The rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the cylinder body and supporting one end of the spring body, and the body portion of the pressing member includes: The other end portion of the spring body may be supported, and the spring body may be configured to expand and contract in the vertical direction as the relative position of the main body portion in the vertical direction with respect to the support member changes. In this aspect, one end of the spring body is supported by a support member whose relative position with the cylinder body is unchanged, and the other end of the spring body has a relative position with the cylinder body that is in the vertical direction of the piston. It is supported by the main body that changes as the robot moves up and down. Therefore, the spring body expands and contracts in the vertical direction as the relative position in the vertical direction of the main body with respect to the support member changes. This makes it possible to alleviate an impact when the upper surface of the upper rim contacts the lower surface of the upper spindle with a simple configuration in which the support member as described above is provided.
前記タイヤ試験機のリム交換機構は、前記シリンダ本体との相対位置が一定である支持部材であって前記ばね体の一端部を支持する支持部材をさらに備え、前記押圧部材の前記本体部は、前記ピストンの昇降動作に連動して上下に移動可能な上側部材と、当該上側部材の下方に位置する下側部材と、前記上側部材から前記下側部材まで下方に延びて前記上側部材と前記下側部材とを連結する棒体と、を含み、前記支持部材は、前記上側部材と前記下側部材との間に介在し、前記支持部材は、当該支持部材を上下方向に貫通し前記棒体が挿通される挿通孔を有し、前記リム交換機構は、前記支持部材の前記挿通孔に配置されるすべりブシュをさらに備え、前記すべりブシュは、当該すべりブシュを上下方向に貫通し前記棒体が摺動可能に挿通される貫通孔を有し、前記棒体は、前記すべりブシュに支持されながら前記上側部材に連動して上下に移動するように構成されている。この態様では、前記支持部材は、前記すべりブシュを介して前記棒体を支えている。このため、前記棒体は、上下方向に変位するときに当該上下方向以外の方向、例えば水平方向に変位することが抑制される。したがって、前記棒体において当該棒体の軸振れ等の問題が発生することが抑制される。
The rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the cylinder body and supporting one end of the spring body, and the body portion of the pressing member includes: An upper member that can move up and down in conjunction with the lifting and lowering operation of the piston, a lower member positioned below the upper member, and extending downward from the upper member to the lower member so as to extend downward from the upper member and the lower member A rod that connects a side member, and the support member is interposed between the upper member and the lower member, and the support member penetrates the support member in the vertical direction and the rod body. The rim exchanging mechanism further includes a sliding bush arranged in the insertion hole of the support member, and the sliding bush passes through the sliding bush in the vertical direction and the rod body. Is slidably inserted It has a through hole that is, the rod is configured to move up and down in conjunction with the upper member while being supported by the bush. In this aspect, the support member supports the rod body via the sliding bush. For this reason, when the said rod is displaced to an up-down direction, it is suppressed that it displaces in directions other than the said up-down direction, for example, a horizontal direction. Therefore, the occurrence of problems such as shaft runout of the rod body is suppressed in the rod body.
前記タイヤ試験機のリム交換機構は、圧縮空気が前記シリンダ室の前記下室に供給されることを許容するとともに前記シリンダ室の前記上室から空気が排出されることを許容する第1許容状態と前記圧縮空気が前記上室に供給されることを許容するとともに前記下室から空気が排出されることを許容する第2許容状態と前記上室及び前記下室から空気が排出されることを許容するとともに前記圧縮空気が前記上室及び前記下室に供給されることを阻止する阻止状態とに切り替え可能な切替弁と、前記切替弁の動作を制御する切替弁制御部と、をさらに備え、前記切替弁制御部は、前記タイヤ試験が行われる場合には、前記押圧部材の前記本体部が前記上方位置に配置されるように前記切替弁を前記第1許容状態に切り替える制御を行い、前記上リムが前記上スピンドルから取り外される場合には、前記押圧部材の前記本体部が前記下方位置に配置されるように前記切替弁を前記第2許容状態に切り替える制御を行い、前記上リムが前記上スピンドルに装着される場合には、前記上リムが前記上スピンドルから取り外された状態で前記切替弁を前記阻止状態に切り替える制御を行うことが好ましい。この態様では、前記タイヤ試験、前記上リムの取り外し、及び前記上リムの装着のそれぞれに必要とされる前記押圧部材の動作がコントローラの前記切替弁制御部により自動でかつ確実に達成される。
The tire testing machine rim replacement mechanism allows a compressed air to be supplied to the lower chamber of the cylinder chamber and allows air to be discharged from the upper chamber of the cylinder chamber. And a second allowable state in which the compressed air is allowed to be supplied to the upper chamber and air is allowed to be discharged from the lower chamber, and air is discharged from the upper chamber and the lower chamber. A switching valve capable of switching to a blocking state that permits and prevents the compressed air from being supplied to the upper chamber and the lower chamber, and a switching valve control unit that controls the operation of the switching valve. When the tire test is performed, the switching valve control unit performs control to switch the switching valve to the first allowable state so that the main body portion of the pressing member is disposed at the upper position, in front When the upper rim is removed from the upper spindle, control is performed to switch the switching valve to the second permissible state so that the main body portion of the pressing member is disposed at the lower position, and the upper rim is When mounted on the upper spindle, it is preferable to perform control to switch the switching valve to the blocking state with the upper rim removed from the upper spindle. In this aspect, the operation of the pressing member required for the tire test, the removal of the upper rim, and the mounting of the upper rim is automatically and reliably achieved by the switching valve controller of the controller.
前記タイヤ試験機のリム交換機構において、前記上リムが前記上スピンドルに装着された状態において前記ばね体が前記本体部に対して加える前記下向きの押圧力は、前記永久磁石による磁力から、前記複数のリムにおける複数の上リムのうち最大の重量を有する上リムの重量を減算した値よりも小さくなるように設定されているのが好ましい。タイヤ試験は、前記上リムが前記上スピンドルに装着された状態で行われる。したがって、この装着状態において前記ばね体が前記本体部に対して加える前記下向きの押圧力が前記磁力から前記重量を減算した値よりも小さいことは、上リムが上スピンドルにより保持されることを可能にする。
In the rim exchanging mechanism of the tire testing machine, the downward pressing force that the spring body applies to the main body in a state where the upper rim is mounted on the upper spindle is derived from the magnetic force of the permanent magnet. Preferably, the rim is set to be smaller than a value obtained by subtracting the weight of the upper rim having the maximum weight among the plurality of upper rims. The tire test is performed in a state where the upper rim is mounted on the upper spindle. Therefore, the downward pressing force that the spring body applies to the main body in this mounted state is smaller than the value obtained by subtracting the weight from the magnetic force, so that the upper rim can be held by the upper spindle. To.
前記タイヤ試験機のリム交換機構は、前記上スピンドルとの相対位置が一定である支持部材をさらに備え、前記押圧部材の前記本体部は、前記支持部材よりも下方に位置する下側部材を含み、前記押圧部材の前記ばね体は、前記支持部材と前記下側部材との間に介在するように配置され、当該ばね体の上端部が前記支持部材に支持されるとともに前記ばね体の下端部が前記下側部材に支持されており、当該ばね体は、収縮することにより前記下側部材が前記支持部材に近づくことを許容し、当該ばね体は、前記本体部が少なくとも前記上方位置と前記下方位置との間に位置するときに当該ばね体の弾性力により前記本体部の前記下側部材に対して下向きの押圧力を加えるように構成されていてもよい。この態様は、前記のような支持部材を設けるという簡単な構成で、前記上リムの前記上面が前記上スピンドルの前記下面に接するときの衝撃を緩和することを可能にする。
The rim exchanging mechanism of the tire testing machine further includes a support member having a constant relative position to the upper spindle, and the main body portion of the pressing member includes a lower member positioned below the support member. The spring body of the pressing member is disposed so as to be interposed between the support member and the lower member, and an upper end portion of the spring body is supported by the support member and a lower end portion of the spring body Is supported by the lower member, and the spring body allows the lower member to approach the support member by contracting, and the spring body has at least the main body portion and the upper position. You may comprise so that downward pressing force may be applied with respect to the said lower side member of the said main-body part with the elastic force of the said spring body, when located between lower positions. This aspect makes it possible to mitigate an impact when the upper surface of the upper rim contacts the lower surface of the upper spindle with a simple configuration in which the support member as described above is provided.
前記タイヤ試験機のリム交換機構において、前記押圧部材の前記本体部は、前記支持部材よりも上方に位置する上側部材と、前記上側部材から前記下側部材まで下方に延びて前記上側部材と前記下側部材とを連結する棒体と、を含み、前記押圧部材の前記ばね体は、前記支持部材と前記下側部材との間に介在する第1のばね体であり、当該第1のばね体の上端部が前記支持部材に支持されるとともに前記第1のばね体の下端部が前記下側部材に支持されており、前記押圧部材は、前記支持部材と前記上側部材との間に介在する第2のばね体をさらに含み、当該第2のばね体の上端部が前記上側部材に支持されるとともに前記第2のばね体の下端部が前記支持部材に支持されており、前記第1のばね体は、収縮することにより前記下側部材が前記支持部材に近づくことを許容し、前記第1のばね体は、当該第1のばね体が収縮しているときに当該第1のばね体の弾性力により前記本体部の前記下側部材に対して下向きの押圧力を加えるように構成され、前記第2のばね体は、収縮することにより前記上側部材が前記支持部材に近づくことを許容し、前記第2のばね体は、当該第2のばね体が収縮しているときに当該第2のばね体の弾性力により前記本体部の前記上側部材に対して上向きの押圧力を加えるように構成されていてもよい。この態様は、前記支持部材の下側に前記第1のばね体を配置し、前記支持部材の上側に前記第2のばね体を配置することにより、上述したように、前記第1のばね体及び前記第2のばね体を含む弾性部を設計するときの自由度を高めることを可能にする。
In the rim exchanging mechanism of the tire testing machine, the main body portion of the pressing member extends upward from the upper member to the lower member, and extends from the upper member to the lower member. A rod body connecting the lower member, wherein the spring body of the pressing member is a first spring body interposed between the support member and the lower member, the first spring The upper end of the body is supported by the support member, and the lower end of the first spring body is supported by the lower member, and the pressing member is interposed between the support member and the upper member. A second spring body that is supported by the upper member, and a lower end of the second spring body is supported by the support member. The spring member is contracted so that the lower member becomes The first spring body is allowed to approach the lower member of the main body by the elastic force of the first spring body when the first spring body is contracted. The second spring body allows the upper member to approach the support member by contracting, and the second spring body is configured to apply the downward pressing force to the second spring body. When the spring body is contracted, an upward pressing force may be applied to the upper member of the main body portion by the elastic force of the second spring body. In this aspect, as described above, the first spring body is disposed on the lower side of the support member, and the second spring body is disposed on the upper side of the support member. And it becomes possible to raise the freedom degree when designing the elastic part containing the said 2nd spring body.
前記タイヤ試験機のリム交換機構を用いたリム交換方法では、前記本体部が前記下方位置にある状態又は前記本体部が当該下方位置よりもさらに下方にある状態において前記上スピンドルよりも下方に位置する前記上リムを前記上スピンドルに近づけ、前記上リムの前記上面を前記上スピンドルの前記下面よりも先に前記本体部の前記押圧面に接触させる。これにより、前記上リムの前記上面が前記本体部の前記下面に接するときの衝撃が前記ばね体による前記押圧力により緩和される。
In the rim exchanging method using the rim exchanging mechanism of the tire testing machine, the main body is positioned below the upper spindle in the state where the main body is in the lower position or the main body is further below the lower position. The upper rim to be moved is brought close to the upper spindle, and the upper surface of the upper rim is brought into contact with the pressing surface of the main body portion before the lower surface of the upper spindle. Thereby, the impact when the upper surface of the upper rim contacts the lower surface of the main body is alleviated by the pressing force by the spring body.
In the rim exchanging method using the rim exchanging mechanism of the tire testing machine, the main body is positioned below the upper spindle in the state where the main body is in the lower position or the main body is further below the lower position. The upper rim to be moved is brought close to the upper spindle, and the upper surface of the upper rim is brought into contact with the pressing surface of the main body portion before the lower surface of the upper spindle. Thereby, the impact when the upper surface of the upper rim contacts the lower surface of the main body is alleviated by the pressing force by the spring body.
Claims (11)
- タイヤを挟持するための複数のリムであって当該複数のリムのそれぞれが上リム及び下リムを有するものと、前記複数のリムから選ばれる何れかのリムの上リムが装着されること及び取り外されることが可能な上スピンドルであって当該上スピンドルに装着された前記上リムの上面に接する下面を有するとともに前記上スピンドルに装着された前記上リムを磁力により当該上スピンドルに固定するための永久磁石を有する上スピンドルと、前記下リムが装着される下スピンドルと、を備えたタイヤ試験機に設けられ、前記上スピンドルに固定された前記上リムを交換するためのリム交換機構であって、
前記上リムの前記上面に対して下向きの押圧力を加えるための押圧面を有する本体部とばね体とを含む押圧部材と、
前記本体部を上方位置と下方位置とを含む範囲において上下方向に変位させるアクチュエータと、を備え、
前記上方位置は、前記上スピンドルに装着された前記上リムの前記上面よりも前記本体部の前記押圧面が上方に位置する位置であり、
前記下方位置は、前記上方位置よりも下方の位置であり、前記本体部の前記押圧面が前記上リムの前記上面に対して前記下向きの押圧力を加えながら前記本体部が当該下方位置に向かって下方に移動することにより前記上リムの前記上面を前記上スピンドルの前記下面から下方に離すことを可能にする位置であり、
前記ばね体は、前記下方位置に配置される前記本体部に対して下向きの押圧力を加えるように構成されている、タイヤ試験機のリム交換機構。 A plurality of rims for sandwiching a tire, each of the rims having an upper rim and a lower rim, and an upper rim of any one selected from the plurality of rims being mounted and removed An upper spindle that can be mounted on the upper spindle and has a lower surface that contacts the upper surface of the upper rim, and is permanent for fixing the upper rim mounted on the upper spindle to the upper spindle by a magnetic force. A rim exchanging mechanism for exchanging the upper rim fixed to the upper spindle, provided in a tire testing machine including an upper spindle having a magnet and a lower spindle to which the lower rim is mounted,
A pressing member including a main body portion having a pressing surface for applying a downward pressing force to the upper surface of the upper rim and a spring body;
An actuator that vertically displaces the main body in a range including an upper position and a lower position,
The upper position is a position where the pressing surface of the main body is positioned above the upper surface of the upper rim mounted on the upper spindle,
The lower position is a position below the upper position, and the main body portion faces the lower position while the pressing surface of the main body portion applies the downward pressing force to the upper surface of the upper rim. The upper surface of the upper rim can be moved downward from the lower surface of the upper spindle by moving downward.
The rim replacement mechanism for a tire testing machine, wherein the spring body is configured to apply a downward pressing force to the main body portion disposed at the lower position. - 請求項1に記載のタイヤ試験機のリム交換機構であって、
前記上スピンドルは、前記タイヤ試験機のフレームに対して回転自在に支持され、
前記アクチュエータは、前記フレームに対して固定されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 1,
The upper spindle is rotatably supported with respect to the frame of the tire testing machine,
The actuator is a rim replacement mechanism for a tire testing machine, which is fixed to the frame. - 請求項1に記載のタイヤ試験機のリム交換機構であって、
前記ばね体は、上下方向に伸縮するように構成され、
前記押圧部材の前記本体部は、上下方向に前記ばね体を貫通し当該ばね体を支持する棒体を含む、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 1,
The spring body is configured to expand and contract in the vertical direction,
The rim replacement mechanism of a tire testing machine, wherein the main body portion of the pressing member includes a rod body that penetrates the spring body in the vertical direction and supports the spring body. - 請求項1に記載のタイヤ試験機のリム交換機構であって、
前記アクチュエータは、シリンダ室を画定するシリンダ本体と、前記シリンダ室に収容されて前記シリンダ室を上室と下室とに区画するピストンであって前記シリンダ室において上下方向に昇降可能なピストンと、を有するエアシリンダであり、
前記本体部は、前記ピストンが上下方向に昇降するのに伴って上下方向に変位するように構成されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 1,
The actuator includes a cylinder body that defines a cylinder chamber, a piston that is accommodated in the cylinder chamber and divides the cylinder chamber into an upper chamber and a lower chamber, and a piston that can be moved up and down in the cylinder chamber; An air cylinder having
The main body is a rim exchanging mechanism of a tire testing machine configured to be displaced in the vertical direction as the piston moves up and down in the vertical direction. - 請求項4に記載のタイヤ試験機のリム交換機構であって、
前記シリンダ本体との相対位置が一定である支持部材であって前記ばね体の一端部を支持する支持部材をさらに備え、
前記押圧部材の前記本体部は、前記ばね体の他端部を支持し、
前記ばね体は、前記支持部材に対する前記本体部の上下方向の相対位置が変化するのに伴って上下方向に伸縮するように構成されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 4,
A support member having a constant relative position to the cylinder body and further supporting a one end of the spring body;
The main body of the pressing member supports the other end of the spring body,
The rim replacement mechanism for a tire testing machine, wherein the spring body is configured to expand and contract in the vertical direction as the relative position in the vertical direction of the main body portion with respect to the support member changes. - 請求項4に記載のタイヤ試験機のリム交換機構であって、
前記シリンダ本体との相対位置が一定である支持部材であって前記ばね体の一端部を支持する支持部材をさらに備え、
前記押圧部材の前記本体部は、前記ピストンの昇降動作に連動して上下に移動可能な上側部材と、当該上側部材の下方に位置する下側部材と、前記上側部材から前記下側部材まで下方に延びて前記上側部材と前記下側部材とを連結する棒体と、を含み、
前記支持部材は、前記上側部材と前記下側部材との間に介在し、
前記支持部材は、当該支持部材を上下方向に貫通し前記棒体が挿通される挿通孔を有し、
前記リム交換機構は、前記支持部材の前記挿通孔に配置されるすべりブシュをさらに備え、
前記すべりブシュは、当該すべりブシュを上下方向に貫通し前記棒体が摺動可能に挿通される貫通孔を有し、
前記棒体は、前記すべりブシュに支持されながら前記上側部材に連動して上下に移動するように構成されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 4,
A support member having a constant relative position to the cylinder body and further supporting a one end of the spring body;
The main body portion of the pressing member includes an upper member that can move up and down in conjunction with the lifting and lowering operation of the piston, a lower member that is positioned below the upper member, and a lower portion from the upper member to the lower member. A rod that extends to connect the upper member and the lower member,
The support member is interposed between the upper member and the lower member,
The support member has an insertion hole that penetrates the support member in the vertical direction and through which the rod body is inserted.
The rim replacement mechanism further includes a sliding bush arranged in the insertion hole of the support member,
The sliding bush has a through-hole through which the sliding body is slidably inserted through the sliding bush in the vertical direction,
The rim replacement mechanism of a tire testing machine, wherein the rod body is configured to move up and down in conjunction with the upper member while being supported by the sliding bush. - 請求項4に記載のタイヤ試験機のリム交換機構であって、
圧縮空気が前記シリンダ室の前記下室に供給されることを許容するとともに前記シリンダ室の前記上室から空気が排出されることを許容する第1許容状態と前記圧縮空気が前記上室に供給されることを許容するとともに前記下室から空気が排出されることを許容する第2許容状態と前記上室及び前記下室から空気が排出されることを許容するとともに前記圧縮空気が前記上室及び前記下室に供給されることを阻止する阻止状態とに切り替え可能な切替弁と、
前記切替弁の動作を制御する切替弁制御部と、をさらに備え、
前記切替弁制御部は、
前記タイヤ試験が行われる場合には、前記押圧部材の前記本体部が前記上方位置に配置されるように前記切替弁を前記第1許容状態に切り替える制御を行い、
前記上リムが前記上スピンドルから取り外される場合には、前記押圧部材の前記本体部が前記下方位置に配置されるように前記切替弁を前記第2許容状態に切り替える制御を行い、
前記上リムが前記上スピンドルに装着される場合には、前記上リムが前記上スピンドルから取り外された状態で前記切替弁を前記阻止状態に切り替える制御を行う、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 4,
A first allowable state in which compressed air is allowed to be supplied to the lower chamber of the cylinder chamber and air is allowed to be discharged from the upper chamber of the cylinder chamber, and the compressed air is supplied to the upper chamber. A second permissible state allowing air to be discharged from the lower chamber and allowing the air to be discharged from the upper chamber and the lower chamber, and allowing the compressed air to flow from the upper chamber And a switching valve that can be switched to a blocking state for blocking supply to the lower chamber,
A switching valve control unit for controlling the operation of the switching valve,
The switching valve control unit
When the tire test is performed, control is performed to switch the switching valve to the first allowable state so that the main body portion of the pressing member is disposed at the upper position,
When the upper rim is removed from the upper spindle, control is performed to switch the switching valve to the second allowable state so that the main body portion of the pressing member is disposed at the lower position,
When the upper rim is mounted on the upper spindle, a rim replacement mechanism for a tire testing machine that performs control to switch the switching valve to the blocking state with the upper rim removed from the upper spindle. - 請求項1に記載のタイヤ試験機のリム交換機構であって、
前記上リムが前記上スピンドルに装着された状態において前記ばね体が前記本体部に対して加える前記下向きの押圧力は、前記永久磁石による磁力から、前記複数のリムにおける複数の上リムのうち最大の重量を有する上リムの重量を減算した値より小さくなるように設定されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 1,
The downward pressing force that the spring body applies to the main body in a state where the upper rim is mounted on the upper spindle is the maximum of the plurality of upper rims in the plurality of rims due to the magnetic force of the permanent magnet. A rim replacement mechanism for a tire testing machine, which is set to be smaller than a value obtained by subtracting the weight of an upper rim having a weight of. - 請求項1に記載のタイヤ試験機のリム交換機構であって、
前記上スピンドルとの相対位置が一定である支持部材をさらに備え、
前記押圧部材の前記本体部は、前記支持部材よりも下方に位置する下側部材を含み、
前記押圧部材の前記ばね体は、前記支持部材と前記下側部材との間に介在するように配置され、当該ばね体の上端部が前記支持部材に支持されるとともに前記ばね体の下端部が前記下側部材に支持されており、
当該ばね体は、収縮することにより前記下側部材が前記支持部材に近づくことを許容し、当該ばね体は、前記本体部が少なくとも前記上方位置と前記下方位置との間に位置するときに当該ばね体の弾性力により前記本体部の前記下側部材に対して下向きの押圧力を加えるように構成されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 1,
A support member having a constant relative position to the upper spindle;
The main body portion of the pressing member includes a lower member positioned below the support member,
The spring body of the pressing member is disposed so as to be interposed between the support member and the lower member, and an upper end portion of the spring body is supported by the support member and a lower end portion of the spring body is Supported by the lower member,
The spring body allows the lower member to approach the support member by contracting, and the spring body is used when the main body is located at least between the upper position and the lower position. A rim exchanging mechanism of a tire testing machine configured to apply a downward pressing force to the lower member of the main body portion by an elastic force of a spring body. - 請求項9に記載のタイヤ試験機のリム交換機構であって、
前記押圧部材の前記本体部は、前記支持部材よりも上方に位置する上側部材と、前記上側部材から前記下側部材まで下方に延びて前記上側部材と前記下側部材とを連結する棒体と、を含み、
前記押圧部材の前記ばね体は、前記支持部材と前記下側部材との間に介在する第1のばね体であり、当該第1のばね体の上端部が前記支持部材に支持されるとともに前記第1のばね体の下端部が前記下側部材に支持されており、
前記押圧部材は、前記支持部材と前記上側部材との間に介在する第2のばね体をさらに含み、当該第2のばね体の上端部が前記上側部材に支持されるとともに前記第2のばね体の下端部が前記支持部材に支持されており、
前記第1のばね体は、収縮することにより前記下側部材が前記支持部材に近づくことを許容し、前記第1のばね体は、当該第1のばね体が収縮しているときに当該第1のばね体の弾性力により前記本体部の前記下側部材に対して下向きの押圧力を加えるように構成され、
前記第2のばね体は、収縮することにより前記上側部材が前記支持部材に近づくことを許容し、前記第2のばね体は、当該第2のばね体が収縮しているときに当該第2のばね体の弾性力により前記本体部の前記上側部材に対して上向きの押圧力を加えるように構成されている、タイヤ試験機のリム交換機構。 A rim replacement mechanism for a tire testing machine according to claim 9,
The main body portion of the pressing member includes an upper member positioned above the support member, and a rod body that extends downward from the upper member to the lower member and connects the upper member and the lower member. Including,
The spring body of the pressing member is a first spring body interposed between the support member and the lower member, and an upper end portion of the first spring body is supported by the support member and A lower end portion of the first spring body is supported by the lower member;
The pressing member further includes a second spring body interposed between the support member and the upper member, and an upper end portion of the second spring body is supported by the upper member and the second spring. The lower end of the body is supported by the support member;
The first spring body allows the lower member to approach the support member by contracting, and the first spring body includes the first spring body when the first spring body contracts. A downward pressing force is applied to the lower member of the main body by the elastic force of one spring body;
The second spring body allows the upper member to approach the support member by contracting, and the second spring body includes the second spring body when the second spring body contracts. A rim exchanging mechanism for a tire testing machine configured to apply an upward pressing force to the upper member of the main body by the elastic force of the spring body. - 請求項1~10の何れか1項に記載のタイヤ試験機のリム交換機構を用いたリム交換方法であって、
前記本体部が前記下方位置にある状態又は前記本体部が当該下方位置よりもさらに下方にある状態において前記上スピンドルよりも下方に位置する前記上リムを前記上スピンドルに近づけ、前記上リムの前記上面を前記上スピンドルの前記下面よりも先に前記本体部の前記押圧面に接触させる、タイヤ試験機のリム交換方法。
A rim replacement method using the rim replacement mechanism of the tire testing machine according to any one of claims 1 to 10,
In a state where the main body portion is in the lower position or in a state where the main body portion is further lower than the lower position, the upper rim positioned below the upper spindle is brought closer to the upper spindle, and the upper rim A rim replacement method for a tire testing machine, wherein an upper surface is brought into contact with the pressing surface of the main body portion before the lower surface of the upper spindle.
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JPS6076330A (en) * | 1983-10-01 | 1985-04-30 | Kobe Steel Ltd | Automatic rim exchanging device for tyre uniformity machine |
WO2010061845A1 (en) * | 2008-11-28 | 2010-06-03 | 株式会社神戸製鋼所 | Rim mounting device for tire testing device, magnet mounting method, rim replacing device, and tire testing device |
JP2010151492A (en) * | 2008-12-24 | 2010-07-08 | Kobe Steel Ltd | Method of attaching magnet and method of detaching magnet |
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