CN110799319A - Air charging system - Google Patents
Air charging system Download PDFInfo
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- CN110799319A CN110799319A CN201780092530.5A CN201780092530A CN110799319A CN 110799319 A CN110799319 A CN 110799319A CN 201780092530 A CN201780092530 A CN 201780092530A CN 110799319 A CN110799319 A CN 110799319A
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- rim
- support portion
- tire
- axial direction
- rim support
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Tyre Moulding (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention provides an inflator, comprising: a lower rim support part (11) for supporting a lower rim (10 b); an upper rim support part (15) for supporting an upper rim (15 b); a movement restriction unit (37) that restricts the movement of the lower rim support unit (11) to the lower side away from the upper rim support unit (15); a position adjusting rod (21) which penetrates through the lower rim support part (11) and extends towards the upper side; a connector (51) which is attached to the upper rim support section (15) and connects the upper rim support section (15) to the position adjustment rod (21); and a rim inserting/removing device (40) for inserting/removing the lower rim support part (11) upward.
Description
Technical Field
The present invention relates to an inflator that holds a tire and inflates the tire by filling air into the tire.
Background
Tires used in vehicles such as cars, trucks, and buses are produced by subjecting tires to a vulcanization process in a tire vulcanizer at high temperature and high pressure. The tire subjected to the vulcanization process in the tire manufacturing process is carried into the cooling device from the tire vulcanizer, cooled in the cooling device, and carried out.
As such a cooling device, there is one described in patent document 1. The cooling device includes an inflator that inflates the tire after the tire is held by the upper rim and the lower rim. When the lower rim is fitted into the lower bead portion of the tire and the upper rim is fitted into the upper bead portion of the tire, the tire is held by these upper rim and lower rim. The upper bead portion and the lower bead portion of the tire are sealed by the upper rim and the lower rim. When the tire is held and sealed by the upper rim and the lower rim, air is supplied into the tire, and the tire is inflated.
The inflation device has a position adjustment device capable of adjusting the interval between the upper rim and the lower rim according to the tire width. The position adjusting device has a position adjusting rod and a rotating mechanism. The position adjusting rod has a screw shaft extending in the axial direction with the axial line as the center, and a displacement cylinder in a cylindrical shape covering the outer periphery of the screw shaft. The rotation mechanism rotates the screw shaft about the axis. The screw shaft has an external thread formed on its outer periphery. An internal thread that can be screwed to the external thread is formed on the inner periphery of the displacement cylinder. A lower rim is disposed on the outer peripheral sides of the screw shaft and the displacement cylinder. The lower rim is fixed so as not to be movable relative to the axial axis direction of the screw. The upper rim is fixed to the displacement cylinder by a connector. When the screw shaft rotates about the axis, the displacement cylinder screwed to the screw shaft moves in the axial direction. As a result, the upper rim moves in the axial direction with respect to the lower rim.
Prior art documents
Patent document
Patent document 1: japanese patent No. 2670251
Disclosure of Invention
Technical problem to be solved by the invention
In the case of holding a tire by an inflator, after a lower rim is fitted into a lower bead portion of the tire, an upper rim is fitted into an upper bead portion of the tire.
The tire immediately after vulcanization is soft and easily deformed. Therefore, the upper bead portion of the tire hangs down in a state where the lower rim is fitted into the lower bead portion of the tire. In particular, in recent years, the weight of the tire is reduced, the thickness of the tire is reduced, and the upper bead portion is more likely to be deformed, so that the amount of sagging of the upper bead portion is increased, and the distance between the upper bead portion and the lower bead portion is narrowed. Therefore, in the case of a tire having a narrow tire width, the upper rim may not be fitted into the upper bead portion of the tire. When the upper rim is not fitted into the upper bead portion of the tire, the upper bead portion is not sealed by the upper rim, and therefore, the tire cannot be inflated.
Therefore, if the range of movement of the displacement cylinder in the axial direction with respect to the screw shaft is set to be large, the upper rim can be fitted into the upper bead portion of the tire even in a tire having a narrow tire width. However, in order to increase the range of movement of the displacement cylinder in the axial direction with respect to the screw shaft, the length of the screw rod in the axial direction needs to be increased, and the length of the displacement cylinder in the axial direction needs to be increased.
Accordingly, an object of the present invention is to provide an inflator capable of inflating even a tire having a narrow tire width while suppressing an increase in the height of the inflator.
Means for solving the technical problem
An inflator according to a first aspect of the present invention is an inflator for filling air into a tire that is sandwiched between a first rim and a second rim in a tire width direction, the inflator including: a first rim support portion supporting the first rim; a second rim support portion that is arranged side by side in an axial direction with respect to the first rim support portion and supports the second rim; a movement restricting portion that restricts movement of one of the first and second rim support portions in the axial direction to a side separated from the other rim support portion; a position adjusting rod penetrating the one rim support portion and extending in the axial direction toward the other rim support portion; a connector attached to the other rim support portion to connect the other rim support portion to the position adjustment rod; and a rim in-out device that moves the one rim support portion in and out of the one side close to the other rim support portion in the axial direction.
In this aspect, the rim support portion can be moved to a side close to the other rim support portion by driving the rim in-out device. Therefore, in this aspect, the adjustment width of the interval between the two rim support portions in the axial direction can be increased without increasing the length of the position adjustment rod in the axial direction. Thus, according to this aspect, even if the length of the position adjustment rod in the axial direction is not made long, it is possible to sandwich a tire having a narrow tire width between two rims and inflate the tire.
According to the inflator of the first aspect, in the inflator of the second aspect according to the present invention, the position adjustment rod includes: a shaft portion extending in the axial direction; and a displacement portion that is engaged with at least a part of the shaft portion and is displaceable with respect to the axial position of the shaft portion. The connector connects the other rim support portion to the displacement portion of the position adjusting rod.
In this aspect, by moving the other rim support portion in the axial direction, the interval between the first rim and the second rim in the axial direction can be set to an interval that matches the rim width of the tire.
According to the inflator of the second aspect, in the inflator of the third aspect relating to the present invention, the position adjustment rod includes a stopper that restricts movement of the other rim support portion, which is connected to the displacement portion by the connector, in the axial direction to a side closer to the one rim support portion. The stopper is fixed to the displacement portion.
In this aspect, the position of the other rim support portion in the axial direction with respect to the displacement portion can be regulated. Therefore, according to this aspect, when the other rim support portion is coupled to the displacement portion by the coupler, the relative position of the other rim support portion with respect to the displacement portion in the axial direction can be easily determined.
According to the inflator of the second aspect or the third aspect, in the inflator of a fourth aspect according to the present invention, the rim inlet/outlet device includes: a rod extending in the axial direction; and a cylinder liner supporting the rod to be movable forward and backward in the axial direction. The first end of the rod is received within the cylinder liner. A second end of the rod protrudes from the cylinder liner and is coupled to the one rim support. A range in which the cylinder liner is provided in the axial direction overlaps with a range in which the shaft portion is provided in the axial direction.
In this aspect, the range in which the cylinder liner is provided in the axial direction overlaps with the range in which the shaft portion is provided in the axial direction. Therefore, in this aspect, the increase in the device height due to the rim drop device can be suppressed.
According to the inflator of the fourth aspect, the inflator of the fifth aspect relating to the present invention includes a base that supports the shaft portion on a side opposite to the other rim support portion with respect to the one rim support portion in the axial direction. The cylinder liner is provided in a range in which the axial portion and the base are provided in the axial direction.
In this aspect, the cylinder liner is provided in a range where the shaft portion and the base are provided in the axial direction. Therefore, in this embodiment, it is possible to avoid an increase in the device height due to the rim inlet/outlet device.
According to the inflator of the fifth aspect, in the inflator of the sixth aspect relating to the present invention, the cylinder liner is connected to and supported by the base.
According to a seventh aspect of the present invention, in the inflator according to any one of the fourth to sixth aspects, the rim advancing/retracting device is a cylinder that advances and retracts the rod in the axial direction in accordance with an amount of gas in the cylinder liner.
As the rim in-out device, an air cylinder or a linear actuator can be used. However, when a linear actuator configured by combining mechanical elements such as gears is used as the rim moving device, control is required to move the operating end of one rim support portion to a side away from the other rim support portion in accordance with expansion of the tire in a process of moving one rim support portion to a side close to the other rim support portion and inflating the tire after the tire is clamped between two rims. On the other hand, when the air cylinder is used as the rim in-out device, the operating end (the tip end of the rod) moves to the side away from the other rim support portion due to the force received from the tire as the tire expands. Therefore, if the air cylinder is used as the rim advancing and retracting device as in this aspect, there is no need to control the movement of the operating end to the side away from the other rim supporting portion. Thus, according to this embodiment, simplification of control and reduction in device cost can be achieved.
Effects of the invention
According to an aspect of the inflator according to the present invention, it is possible to suppress an increase in the height of the inflator, and to inflate even a tire having a narrow tire width.
Drawings
Fig. 1 is a sectional view of an inflator according to an embodiment of the present invention.
Fig. 2 is a sectional view taken along line ii-ii in fig. 1.
Fig. 3 is a sectional view of the inflator before the upper rim support portion is coupled according to the embodiment of the present invention.
Fig. 4 is a cross-sectional view of the inflator when the upper rim is fitted into the tire in the embodiment according to the present invention.
Fig. 5 is a sectional view of the inflator after completion of inflation of the tire in the embodiment according to the present invention.
Detailed Description
Hereinafter, an embodiment of an inflator according to the present invention will be described with reference to the drawings.
As shown in fig. 1, the inflator of the present embodiment is a device that sandwiches a tire T in the tire width direction by an upper rim 15 and a lower rim 10, and fills the tire T with air to inflate the tire T. In the present embodiment, the tire T held by the inflator is left to stand for a predetermined time, and the tire T is naturally cooled. That is, the inflator of the present embodiment functions as a tire cooling device. The tire T subjected to the vulcanization process by the tire vulcanizer is cooled while being inflated by an inflator functioning as a tire cooling device.
When the tire T is clamped between the upper rim 15 and the lower rim 10, the tire center axis is oriented in the vertical direction. The upper rim 15 is fitted into the upper bead portion bu of the tire T in this state, and the lower rim 10 is fitted into the lower bead portion bd of the tire T in this state. Thereby, the upper rim 15 is positioned above the lower rim 10.
The inflator of the present embodiment includes a lower rim support portion (first rim support portion or one rim support portion) 11 that supports a lower rim (first rim) 10, an upper rim support portion (second rim support portion or the other rim support portion) 16 that supports an upper rim (second rim) 15, and a position adjustment device 20 that moves the upper rim support portion 16 in the vertical direction relative to the lower rim support portion 11.
An air supply passage 12 for filling air into a tire T fitted into the lower rim 10 supported by the lower rim support 11 is formed in the lower rim support 11.
The position adjusting device 20 includes a position adjusting rod 21, a rotating mechanism 31, and a base 35. The position adjustment rod 21 includes a screw shaft (shaft portion) 22 extending in the axial direction Da about the axis a, and a displacement cylinder (displacement portion) 25 having a cylindrical shape and covering a part of the outer periphery of the screw shaft 22. In the present embodiment, the axis a extends in the vertical direction. The axial direction Da is a direction in which the axis Da extends. Thus, the axial direction Da is the vertical direction.
The rotation mechanism 31 rotates the screw shaft 22 about the axis a. The rotation mechanism 31 includes a driven gear 32 fixed to a lower portion of the screw shaft 22, a drive gear 33 engaged with the driven gear 32, and a motor 34 for rotating the drive gear 33. The screw shaft 22 is supported by the base 35 to be rotatable about the axis a. The driven gear 32 and the drive gear 33 are housed in a base 35. The housing of the motor 34 is fixed to the base 35.
A male screw 23 is formed on the outer periphery of the screw shaft 22. A female screw 26 is formed on the inner periphery of the displacement cylinder 25 to be screwed with the male screw 23. The lower rim support 11 is disposed on the outer periphery of the displacement cylinder 25 so as to be movable relative to the displacement cylinder 25 in the axial direction Da. In other words, the displacement cylinder 25 penetrates the lower rim support 11 so as to be movable relative to the lower rim support 11 in the axial direction Da. The upper rim 15 is connected to the upper portion of the displacement tube 25 by a connector 51. The position adjustment bar 21 also has an upper stop 28. The upper stopper 28 restricts the upper rim support portion 16 from moving to the side close to the lower rim support portion 11, i.e., the lower side in the axial direction Da. The upper stopper 28 is fixed to the displacement cylinder 25.
The screw shaft 22 and a part of the displacement cylinder 25 overlap in the axial direction Da. The internal thread 26 of the displacement cylinder 25 is screwed with a part of the external thread 23 of the screw shaft 22. That is, the displacement cylinder 25 engages with a part of the screw shaft 22. When the screw shaft 22 is rotated about the axis a by driving of the rotation mechanism 31, the displacement cylinder 25 screwed with the screw shaft 22 moves in the axial direction Da. In other words, when the screw shaft 22 rotates, the overlapping width of the displacement cylinder 25 with the screw shaft 22 in the axial direction Da changes, and the length of the position adjustment rod 21 in the axial direction Da changes. As a result, the upper rim 15 supported by the upper rim support portion 16 moves relatively in the axial direction Da with respect to the lower rim 10 supported by the lower rim support portion 11. Thus, the position adjustment device 20 adjusts the gap between the upper rim 15 and the lower rim 10 by moving the upper rim support portion 16 in the axial direction Da.
The inflator further includes the connector 51, a coupling driver 52 for coupling the connector 51, and a lifter 55 for moving the coupling driver 52 in the axial direction Da. The coupler 51 is attached to the upper rim support portion 16. As described above, the coupler 51 couples the upper rim support portion 16 to the displacement tube 25. The coupling driver 52 can hold the coupling 51. The coupling actuator 52 operates the coupler 51 while holding the coupler 51, so that the upper rim support portion 16 is coupled to the displacement tube 25 by the coupler 51, and the coupling actuator 52 releases the coupling.
The link actuator 52 is attached to the lifter 55. Thereby, the coupling driver 52 moves in the axial direction Da by driving the lifter 55. When the coupling actuator 52 holds the coupling element 51, if the upper rim support portion 16 is coupled to the displacement cylinder 25, the coupling element 51, the upper rim support portion 16 attached to the coupling element 51, and the upper rim 15 supported by the upper rim support portion 16 also move in the axial direction Da in accordance with the movement of the coupling actuator 52 in the axial direction Da by the driving of the lifter 55.
As shown in fig. 2, the inflator further includes a lower rim movement restricting portion 37 that restricts movement of the lower rim support portion 11 to the lower side, which is the side apart from the upper rim support portion 16, and a rim inlet/outlet device 40 that allows the lower rim support portion 11 to enter and exit to the upper side, which is the side close to the upper rim support portion 16.
The lower rim movement regulating portion 37 includes a lower stopper 38 facing the lower surface of the lower rim supporting portion 11 and a stopper support leg 39 supporting the lower stopper 38. The lower stopper 38 is annular about the axis a and is separated from the displacement cylinder 25 in a radial direction Dr with respect to the axis a. The stopper support leg 39 is cylindrical about the axis a, and is separated from the displacement cylinder 25 in the radial direction Dr. The stopper support leg 39 is fixed to the base 35. The lower stopper 38 is fixed to the upper end of the stopper support leg 39.
The rim in-out 40 is a cylinder. The rim inlet/outlet 40 includes a rod 41 extending in the axial direction Da, and a cylinder sleeve 42 supporting the rod 41 to be able to advance and retreat in the axial direction Da. A first end of the rod 41 is received in a cylinder liner 42. A piston, not shown, is fixed to the first end. The second end of the rod 41 protrudes from the cylinder liner 42 and is coupled to the lower rim support 11. The interior of the cylinder liner 42 is partitioned by a piston into a first chamber on the side where the rod 41 is provided and a second chamber on the opposite side. The cylinder liner 42 is fixed to the base 35 and the stopper support leg 39 via a bracket 45. The range in which the cylinder liner 42 is provided in the axial direction Da overlaps with the range in which the screw shaft 22 is provided in the axial direction Da. The cylinder liner 42 is provided in a range where the screw shaft 22 and the base 35 are provided in the axial direction Da.
An air feeder such as a compressor is connected to each chamber of the cylinder liner 42. The position of the rod 41 with respect to the cylinder liner 42 changes according to a change in the pressure balance of each chamber corresponding to the supply condition of air supplied from the air feeder to each chamber in the cylinder liner 42. Specifically, in the case where the pressure in the first chamber is higher than the pressure in the second chamber, most of the rod 41 is accommodated in the cylinder liner 42. In this state, the lower rim support 11 connected to the rod 41 contacts the lower stopper 38. When the pressure in the first chamber is lower than the pressure in the second chamber, the rod 41 moves upward. As a result, the lower rim support 11 connected to the rod 41 moves upward. As described above, the lower rim support portion 11 moves in the up-down direction (axial direction Da) in accordance with the amount of air supplied to the inside of the cylinder liner 42.
As described above, in the present embodiment, both the upper rim support portion 16 and the lower rim support portion 11 are movable in the axial direction Da.
As shown in fig. 1, a lower limit position (first separation limit position) d1 of lower rim support 11 is a position where lower rim support 11 contacts lower stopper 38. The lower limit position (second approaching limit position) d2 of the upper rim support portion 16 is a position at which the length of the position adjusting rod 21 in the axial direction Da is shortest. The upper rim 15 supported by the upper rim support portion 16 at the lower limit position d2 is slightly separated upward from the lower rim 10 supported by the lower rim support portion 11 at the lower limit position d 1. That is, the lower limit position d2 of the upper rim support portion 16 is a position at which the upper rim 15 supported by the upper rim support portion 16 is slightly separated upward from the lower rim 10 supported by the lower rim support portion 11 at the lower limit position d 1. As shown in fig. 2, the upper limit position (second separation limit position) u2 of the upper rim supporting portion 16 is a position at which the length of the position adjusting rod 21 in the axial direction Da is the longest. When the upper rim support portion 16 is located at the upper limit position u2 and the lower rim support portion 11 is located at the lower limit position d1, the interval between the upper rim 15 supported by the upper rim support portion 16 and the lower rim 10 supported by the lower rim support portion 11 in the axial direction Da becomes maximum. The lower rim 10 supported by the lower rim support portion 11 of the upper limit position (first approaching position) u1 is in contact with the upper rim 15 supported by the upper rim support portion 16 of the upper limit position u 2. That is, the upper limit position (first approximate position) u1 of the lower rim support portion 11 is a position at which the lower rim 10 supported by the lower rim support portion 11 contacts the upper rim 15 supported by the upper rim support portion 16 at the upper limit position u 2. Thus, the stroke of the rod of the rim inserting and removing device requires a stroke equal to or greater than the distance between the lower limit position d1 and the upper limit position u1 of the lower rim support 11. Further, the lower rim 10 supported by the lower rim support portion 11 at the upper limit position (first approaching position) u1 may be spaced apart from the upper rim 15 supported by the upper rim support portion 16 at the upper limit position u2 without contacting the upper rim 15.
When the tire T is held by the inflator of the present embodiment, the lower rim 10 is fitted into the lower bead portion bd of the tire T, and then the upper rim 15 is fitted into the upper bead portion bu of the tire T. At this time, the upper rim 15 is fitted into the upper bead portion bu by setting the interval between the upper rim 15 and the lower rim 10 to be narrower than the rim interval matching the tire T.
As described in the background art section, the tire T immediately after the vulcanization treatment is soft and easily deformed. Therefore, the upper bead portion bu of the tire T hangs down with the lower rim 10 fitted to the lower bead portion bd of the tire T. In particular, in recent years, the weight of the tire T is reduced, and therefore the thickness of the tire T is reduced, and the amount of sagging of the upper bead portion bu is increased due to the tendency to deform.
As shown in fig. 1, when inflating a tire Ta having a wide tire width, first, the length of the position adjusting rod 21 in the axial direction Da is adjusted in a state where the upper rim support portion 16 is not coupled to the position adjusting rod 21 and the lower rim support portion 11 is located at the lower limit position d 1. Specifically, in this state, assuming that the upper rim support portion 16 is coupled to the position adjusting rod 21 and the upper rim 15 is supported by the upper rim support portion 16, the length of the position adjusting rod 21 in the axial direction Da is adjusted so that the interval between the upper rim 15 and the lower rim 10 becomes the rim interval matching the tire Ta. Next, the lower rim 10 supported by the lower rim support portion 11 at the lower limit position d1 is fitted into the lower bead portion bd of the tire Ta.
Next, the coupling actuator 52, the coupler 51 held by the coupling actuator 52, the upper rim support portion 16 attached to the coupler 51, and the upper rim 15 supported by the upper rim support portion 16 are positioned above the displacement cylinder 25. Next, the lifter 55 is driven to lower the coupling actuator 52, the coupler 51 held by the coupling actuator 52, the upper rim support portion 16 attached to the coupler 51, and the upper rim 15 supported by the upper rim support portion 16. Then, the lifter 55 is stopped at a stage where the upper rim support 16 contacts the upper stopper 28. Then, the coupling actuator 52 operates the coupling 51, whereby the upper rim support portion 16 is coupled to the displacement tube 25 via the coupling 51. When the upper rim support portion 16 is coupled to the displacement tube 25, the holding of the coupler 51 by the coupling actuator 52 is released. Then, the lifter 55 is driven to retract the coupling driver 52 upward.
Subsequently, the rim inlet/outlet device 40 is driven to move the lower rim 10 upward, thereby fitting the upper rim 15 into the upper bead portion bu of the tire Ta. In addition, although the rim in-out device 40 is driven to fit the upper rim 15 into the upper bead portion bu of the tire Ta, in the case of a tire Ta having a wide tire width, the rim in-out device 40 is not driven, and the upper rim 15 can be fitted into the upper bead portion bu of the tire Ta only by adjusting the length of the position adjustment rod 21.
When the upper rim 15 is completely fitted into the upper bead portion bu of the tire Ta, the tire Ta is held by the lower rim 10 and the upper rim 15. When the tire Ta is held by the lower rim 10 and the upper rim 15, air from the compressor is supplied into the tire Ta through the air supply passage 12 formed in the lower rim support portion 11, and the tire Ta is inflated.
When the amount of air supplied to the inside of the tire Ta increases and the internal pressure of the tire Ta increases, a force in the direction of separating the upper rim 15 and the lower rim 10 acts on the upper rim 15 and the lower rim 10 from the tire Ta. That is, an upward force acts on the upper rim support portion 16 from the tire Ta, and a downward force acts on the lower rim support portion 11 from the tire Ta. The displacement cylinder 25 of the position adjusting device 20 for moving the upper rim support 16 in the axial direction Da does not move in the axial direction Da unless the screw shaft 22 is rotated, because the female screw 26 of the displacement cylinder 25 is engaged with the male screw 23 of the screw shaft 22. Thus, even if an upward force acts from the tire Ta, the upper rim support portion 16 does not move upward. On the other hand, since the driving source of the rim inlet/outlet device 40 for moving the lower rim support 11 in the axial direction Da is compressed air, when downward force acts on the lower rim support 11, air in the cylinder liner 42 is compressed and moves downward from the rod 41 and the lower rim support 11 connected to the rod 41. The lower rim support 11 finally stops moving downward at the time of contact with the lower stopper 38, in other words, at the time of reaching the lower limit position. At this time, the interval between the upper rim 15 supported by the upper rim support portion 16 and the lower rim 10 supported by the lower rim support portion 11 becomes a rim interval matching the tire Ta.
After the distance between the lower rim 10 and the upper rim 15 becomes the rim distance corresponding to the tire Ta, air supply to the inside of the tire Ta is continued. If sufficient air is supplied into the tire Ta, the inflation is ended. After the inflation is completed, the tire Ta is left to cool for a predetermined time.
When the cooling of the tire Ta is completed, the lifter 55 is driven to lower the coupling actuator 52, and the coupling 51 is held by the coupling actuator 52. Next, after the air in the tire Ta is discharged, the coupling of the upper rim support 16 and the displacement cylinder 25 is released by operating the coupling 51 by the coupling actuator 52. Next, the lifter 55 is driven to retract the coupling actuator 52, the coupler 51 held by the coupling actuator 52, the upper rim support portion 16 attached to the coupler 51, and the upper rim 15 supported by the upper rim support portion 16 upward.
When the upper rim support portion 16 and the upper rim 15 are retracted upward, the tire Ta is lifted upward, and the lower rim 10 is pulled out from the lower bead portion bd of the tire Ta. As a result, the cooled tire Ta is removed.
Next, the case of inflating the tire Tb having a narrow tire width will be described in detail with reference to fig. 3 to 5.
The operation of the inflator when inflating the tire Tb having a narrow tire width is also the same as the operation of the inflator when inflating the tire Ta having a wide tire width described above.
As shown in fig. 3, first, the length of the position adjusting rod 21 in the axial direction Da is adjusted in a state where the upper rim support 16 is not coupled to the position adjusting rod 21 and the lower rim support 11 is located at the lower limit position d 1. Specifically, in this state, assuming that the upper rim support portion 16 is coupled to the position adjusting rod 21 and the upper rim 15b is supported by the upper rim support portion 16, the length of the position adjusting rod 21 in the axial direction Da is adjusted so that the interval between the upper rim 15b and the lower rim 10b becomes the rim interval matching the tire Tb. Next, the lower rim 10b supported by the lower rim support portion 11 is fitted into the lower bead portion bd of the tire Tb. The lower rim 10b is a tire Tb lower rim 10b having a narrow tire width.
Next, similarly to the case of inflating the tire Ta having a wide tire width, the coupling actuator 52, the coupler 51, and the lifter 55 are driven to couple the upper rim support portion 16 supporting the upper rim 15b to the displacement tube 25. The upper rim 15b is an upper rim 15b for a tire Tb having a narrow tire width. As a result, the tire Tb is present between the upper rim 15b supported by the upper rim support portion 16 and the lower rim 10b supported by the lower rim support portion 11. At this time, as shown in fig. 4 and 5, the distance between the lower rim 10b supported by the lower rim support 11 located at the lower limit position d1 and the upper rim 15b supported by the upper rim support 16 is the rim distance Ib of the tire Tb.
The upper bead portion bu of the tire Tb greatly droops downward for the reasons described above. Therefore, as shown in fig. 3, even if the upper rim support portion 16 coupled to the position adjusting rod 21 is positioned at the lower limit position d2, the upper rim 15b supported by the upper rim support portion 16 cannot be fitted into the upper bead portion bu of the tire Tb. Thus, as shown in fig. 4 and 5, at the present stage where the distance between the lower rim 10b and the upper rim 15b is the rim distance Ib of the tire Tb, the upper rim 15b is not fitted into the upper bead portion bu of the tire Tb.
Next, as shown in fig. 4, the rim inlet/outlet device 40 is driven to move the lower rim support 11 at the lower limit position d1 upward. By the upward movement of the lower rim support portion 11, the interval between the upper rim 15b and the lower rim 10b gradually becomes narrower, and the upper rim 15b is fitted into the upper bead portion bu of the tire Tb. Further, the upward movement of the lower rim support portion 11 is continued until the upper rim 15b is completely fitted into the upper bead portion bu of the tire Tb. This may continue the upward movement of the lower rim support portion 11 until the lower rim 10b comes into contact with the upper rim 15 b.
When the upper rim 15b is completely fitted into the upper bead portion bu of the tire Tb, the tire Tb is held by the lower rim 10b and the upper rim 15 b. When the tire Tb is held by the lower rim 10b and the upper rim 15b, air from the compressor is supplied into the tire Tb through the air supply passage 12 formed in the lower rim support portion 11, and the tire Tb is inflated.
When the amount of air supplied to the inside of the tire Tb increases and the internal pressure of the tire Tb increases, a force in the direction of separating the upper rim 15b and the lower rim 10b acts on the upper rim 15b and the lower rim 10b from the tire Tb. Therefore, as described above, the air in the cylinder liner 42 of the rim inlet/outlet device 40 is compressed, and the rod 41 and the lower rim support 11 connected to the rod 41 move downward. As shown in fig. 5, the lower rim support portion 11 eventually stops moving downward at the time of contact with the lower stopper 38, in other words, at the time of reaching the lower limit position. At this time, the interval between the upper rim 15b supported by the upper rim support portion 16 and the lower rim 10b supported by the lower rim support portion 11 becomes a rim interval Ib matching the tire Tb.
After the distance between the lower rim 10b and the upper rim 15b becomes the rim distance Ib matching the tire Tb, air supply to the inside of the tire Tb is continued similarly to the case where the tire Ta having a wide tire width is inflated. If sufficient air is supplied into the tire Tb, the inflation is terminated. After the inflation is completed, the tire Tb is left for a predetermined time and cooled.
When the cooling of the tire Tb is completed, the air in the tire Tb is discharged, and the lifter 55, the coupling actuator 52, and the coupler 51 are operated to release the coupling of the upper rim support 16 and the displacement cylinder 25, as in the case of inflating the tire Ta having a wide tire width. Then, the lifter 55 is driven to retract the coupling actuator 52, the coupling element 51 held by the coupling actuator 52, the upper rim support portion 16 attached to the coupling element 51, and the upper rim 15b supported by the upper rim support portion 16 upward.
When the upper rim support portion 16 and the upper rim 15b are retracted upward, the tire Tb is lifted upward, and the lower rim 10b is pulled out from the lower bead portion bd of the tire Tb. As a result, the cooled tire Tb is removed.
If the tire Tb with a narrow tire width is sandwiched between the upper rim 15b and the lower rim 10b without providing the rim inlet/outlet device 40, the upper rim 15b supported by the upper rim support portion 16 needs to be moved downward until it comes into contact with the lower rim 10b supported by the lower rim support portion 11 at the lower limit position or comes very close to the lower rim 10 b. In this case, in order to increase the relative movement distance of the displacement cylinder 25 with respect to the screw shaft 22, the lengths of the screw shaft 22 and the displacement cylinder 25 in the axial direction Da need to be increased. In this case, the minimum length of the position adjustment rod 21 in the axial direction Da becomes longer, and the height of the apparatus becomes higher.
In the present embodiment, the lower rim support portion 11 is moved upward by driving the rim inlet/outlet device 40, and the lower rim 10b supported by the lower rim support portion 11 can be brought into contact with the upper rim 15 b. Therefore, even if the minimum length of the position adjustment rod 21 in the axial direction Da is not made long, the tire Tb having a narrow tire width can be sandwiched between the upper rim 15b and the lower rim 10b, and the tire Tb can be inflated.
Thus, in the present embodiment, even the tire Tb having a narrow tire width can be inflated while suppressing the height of the apparatus from increasing.
In the present embodiment, although a cylinder is provided as the rim inlet/outlet device 40, a range in which the cylinder liner 42 of the cylinder is provided in the axial direction Da overlaps with a range in which the shaft portion is provided in the axial direction Da. The cylinder liner 42 is provided in a range where the screw shaft 22 and the base 35 are present in the axial direction Da. Thus, in the present embodiment, although the rim inlet/outlet device 40 is provided, the device height can be prevented from being raised by the rim inlet/outlet device 40.
In the present embodiment, the position in the axial direction Da of the upper rim support portion 16 with respect to the displacement cylinder 25 can be regulated. Therefore, in the present embodiment, when the upper rim support portion 16 is coupled to the displacement cylinder 25 by the coupler 51, the relative position of the upper rim support portion 16 with respect to the displacement cylinder 25 in the axial direction Da can be easily determined without providing a sensor or the like for detecting the position of the upper rim support portion 16 in the axial direction Da.
As described above, in the case of the tire Ta having a wide tire width, the distance between the lower rim 10 and the upper rim 15 is set to the rim distance of the tire Ta by driving the position adjusting device 20, and then the rim in-out device 40 is driven to move the lower rim 10 upward, whereby the tire Ta is sandwiched between the upper rim 15 and the lower rim 10. However, in the case of a tire Ta having a wide tire width, the tire Ta may be held between the upper rim 15 and the lower rim 10 by driving only the position adjusting device 20 without driving the rim inlet/outlet device 40. In this case, the distance between the lower rim 10 and the upper rim 15 is set to be narrower than the rim distance of the tire Ta by the driving of the position adjusting device 20.
As described above, the length of the position adjustment rod 21 is adjusted so that the distance between the lower rim 10 and the upper rim 15 becomes the rim distance of the tire T, and then the lower rim 10 is fitted into the lower bead portion bd of the tire T. However, after the lower rim 10 is fitted into the lower bead portion bd of the tire T, the length of the position adjusting rod 21 may be adjusted so that the distance between the lower rim 10 and the upper rim 15 becomes the rim distance of the tire T.
Modification example "
Although the embodiment of the inflator according to the present invention has been described above, the embodiment is provided as an example and is not intended to limit the scope of the invention. This embodiment can be implemented by other various embodiments, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. The embodiment and the modifications thereof are included in the invention described in the claims and the same scope as the invention included in the scope and the gist of the invention.
For example, the rim inlet/outlet device 40 of the above embodiment is a cylinder. However, other devices may be used as long as the lower rim support 11 can be moved to the side close to the upper rim support 16. Examples of such devices include hydraulic cylinders and linear actuators. However, when a linear actuator configured by combining equipment components such as gears is used as the rim feeder, control is required to move the operating end downward in association with expansion of the tire T in a process of fitting the upper rim 15 into the upper bead portion bu of the tire T by moving the operating end upward and then inflating the tire T. On the other hand, if the air cylinder is used as the rim in-out device 40 as in the above-described embodiment, the operating end (the tip of the rod 41) moves downward by the downward force received from the tire T by the operating end as the tire T expands as described above. Therefore, if the air cylinder is used as the rim in-out device 40 as in the above-described embodiment, it is not necessary to control the movement of the operation end downward. Therefore, from the viewpoint of simplification of control and reduction in apparatus cost, it is preferable to use a cylinder as the rim in-out device 40 as in the above embodiment.
Since the length of the position adjustment rod 21 of the above embodiment is changed, the upper rim 15 connected to the position adjustment rod 21 moves. However, the position regulating rod may be a position regulating rod whose length does not change. In this case, a plurality of convex portions or a plurality of concave portions arranged in the axial direction Da are provided on the outer periphery of the position adjusting rod, and the upper rim support portion 16 is coupled to any one of the plurality of convex portions or the plurality of concave portions by the coupler 51.
The inflator of the above embodiment is of a type that naturally cools the tire T. However, it may be a type that forcibly cools the tire T. As a method of forcibly cooling the tire T, there is a method of: a method of rotating the base 35 about the axis a, thereby rotating the tire T held between the upper rim 15 and the lower rim 10 about the axis a, a method of blowing air to the tire T held between the upper rim 15 and the lower rim 10 by a blower or the like, and the like.
The inflator of the present embodiment includes a pair of rim support portions. However, the inflator described in patent document 1 may include four pairs of rim support portions. In this case, as in the inflator described in patent document 1, the flip-type inflator can be configured such that two pairs of first rim support portions are supported so as to be rotatable about an axis extending in the horizontal direction and two pairs of second rim support portions are supported so as to be rotatable about an axis extending in the horizontal direction among the four pairs of rim support portions.
Industrial applicability
According to one aspect of the inflator of the present invention, it is possible to suppress an increase in the height of the inflator, and to inflate a tire having a narrow tire width.
Description of the symbols
10. 10 b-lower rim (first rim), 11-lower rim support (first rim support or one rim support), 12-air supply channel, 15 b-upper rim (second rim), 16-upper rim support (second rim support or another rim support), 20-position adjusting means, 21-position adjusting rod, 22-screw shaft (shaft), 23-external thread, 25-displacement cylinder (displacement), 26-internal thread, 28-upper stop, 31-rotation mechanism, 32-driven gear, 33-drive gear, 34-motor, 35-abutment, 37-lower rim movement limiting portion, 38-lower stop, 39-stop support foot, 40-rim in-out device, 41-rod, 42-cylinder liner, 45-bracket, 51-coupler, 52-coupler drive, 55-lifter, T-tire, T1- (tire wide), T2- (tire narrow), bd-lower bead, bu-upper bead, a-axis, Da-axial (up-down), Dr-radial.
Claims (7)
1. An inflator that fills air into a tire that is clamped between a first rim and a second rim in a tire width direction, the inflator comprising:
a first rim support portion supporting the first rim;
a second rim support portion that is arranged side by side in an axial direction with respect to the first rim support portion and supports the second rim;
a movement restricting portion that restricts movement of one of the first and second rim support portions in the axial direction to a side separated from the other rim support portion;
a position adjusting rod penetrating the one rim support portion and extending in the axial direction toward the other rim support portion;
a connector attached to the other rim support portion to connect the other rim support portion to the position adjustment rod; and
a rim in-out device that brings the one rim support portion in and out in the axial direction to a side close to the other rim support portion.
2. The inflator device according to claim 1,
the position regulating rod has: a shaft portion extending in the axial direction; and a displacement portion that is engaged with at least a part of the shaft portion and is displaceable with respect to the axial position of the shaft portion,
the connector connects the other rim support portion to the displacement portion of the position adjusting rod.
3. The inflator device according to claim 2,
the position adjusting rod has a stopper that restricts movement of the other rim support portion coupled to the displacement portion by the coupler in the axial direction to a side close to the one rim support portion,
the stopper is fixed to the displacement portion.
4. The inflator device according to claim 2 or 3,
the rim inlet-outlet device comprises: a rod extending in the axial direction; and a cylinder liner supporting the rod to be movable forward and backward in the axial direction,
a first end of the rod is received within the cylinder liner, a second end of the rod protrudes from the cylinder liner and is coupled to the one rim support,
a range in which the cylinder liner is provided in the axial direction overlaps with a range in which the shaft portion is provided in the axial direction.
5. The inflator device according to claim 4,
a base for supporting the shaft portion on a side opposite to the other rim support portion with respect to the one rim support portion in the axial direction,
the cylinder liner is provided in a range in which the axial portion and the base are provided in the axial direction.
6. The inflator device according to claim 5,
the cylinder liner is supported by being joined to the base.
7. The inflator device according to any one of claims 4 to 6,
the rim feeder is a cylinder that advances and retreats the rod in the axial direction according to the amount of gas in the cylinder liner.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2017/023797 WO2019003352A1 (en) | 2017-06-28 | 2017-06-28 | Inflation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110799319A true CN110799319A (en) | 2020-02-14 |
Family
ID=64740445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780092530.5A Pending CN110799319A (en) | 2017-06-28 | 2017-06-28 | Air charging system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6508606B1 (en) |
| CN (1) | CN110799319A (en) |
| WO (1) | WO2019003352A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4286146A1 (en) * | 2023-05-29 | 2023-12-06 | Urma Controls sp. z o.o. | Device for cooling and stabilizing the cured tire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189629A (en) * | 2010-02-02 | 2011-09-21 | 株式会社神户制钢所 | Post cure inflator |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS587338A (en) * | 1981-07-07 | 1983-01-17 | Yokohama Rubber Co Ltd:The | Inflate chucking device for pneumatic tire |
| JPS60182118U (en) * | 1984-05-15 | 1985-12-03 | 株式会社ブリヂストン | Post cure inflator |
| JPH0645144B2 (en) * | 1987-05-13 | 1994-06-15 | 三菱重工業株式会社 | Central mechanism of tire vulcanizer |
| JP4291465B2 (en) * | 1999-08-20 | 2009-07-08 | Ｈｉｒｏｔｅｋ株式会社 | Post-cure inflator lock / unlock mechanism |
| JP5968249B2 (en) * | 2013-02-22 | 2016-08-10 | 三菱重工マシナリーテクノロジー株式会社 | Tire vulcanizer unloading apparatus and tire vulcanizer |
-
2017
- 2017-06-28 JP JP2018511167A patent/JP6508606B1/en not_active Expired - Fee Related
- 2017-06-28 WO PCT/JP2017/023797 patent/WO2019003352A1/en active Application Filing
- 2017-06-28 CN CN201780092530.5A patent/CN110799319A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189629A (en) * | 2010-02-02 | 2011-09-21 | 株式会社神户制钢所 | Post cure inflator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019003352A1 (en) | 2019-01-03 |
| JPWO2019003352A1 (en) | 2019-06-27 |
| JP6508606B1 (en) | 2019-05-08 |
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Application publication date: 20200214 |
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