WO2017056810A1 - Driver - Google Patents
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- Publication number
- WO2017056810A1 WO2017056810A1 PCT/JP2016/075006 JP2016075006W WO2017056810A1 WO 2017056810 A1 WO2017056810 A1 WO 2017056810A1 JP 2016075006 W JP2016075006 W JP 2016075006W WO 2017056810 A1 WO2017056810 A1 WO 2017056810A1
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- WO
- WIPO (PCT)
- Prior art keywords
- piston
- center line
- cylinder
- driving machine
- auxiliary
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/28—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction of non-metals
Definitions
- the present invention relates to a driving machine that operates a piston with the pressure of a pressure chamber to hit a stopper.
- a driving machine for driving a stopper into a driven member is described in Patent Document 1.
- the driving machine described in Patent Document 1 is attached to a hollow housing, a cylinder provided in the housing, a piston movably accommodated in the cylinder, a groove provided on the outer peripheral surface of the piston, and the groove.
- An O-ring An O-ring.
- the driving machine includes a driver fixed to the piston, a piston stop provided in the housing, an annular seal surface provided in the piston stop, a flow path formed in the housing, and an air passage connected to the flow path. And a valve mechanism provided in the housing, and a valve stem for operating the valve mechanism.
- the driving machine has a trigger lever and a contact arm for operating the valve stem.
- the objective of this invention is providing the driving device which can suppress that a piston enlarges in a center line direction.
- An embodiment of the invention includes a piston having a striking element attached thereto, a cylinder in which the piston is accommodated so as to be able to reciprocate, and a pressure chamber connected to the inside of the cylinder and striking the piston.
- a first seal member provided on the outer peripheral surface of the piston and contacting the cylinder; and provided on the outer peripheral surface of the piston and guiding reciprocation of the piston inside the cylinder. And a slide ring.
- the piston since the piston is provided with the slide ring, the piston can be prevented from being enlarged in the center line direction.
- FIG. 2 It is a longitudinal cross-sectional view which shows the driving machine of this invention. It is a partial longitudinal cross-sectional view of the driving machine shown in FIG. (A), (B) is sectional drawing which shows the structure of the piston shown in FIG. 2, (C) is a top view which shows the structure of the piston shown in FIG. It is a longitudinal cross-sectional view which shows the example which provided the auxiliary piston in the cylinder.
- (A) is sectional drawing which shows the piston and auxiliary piston of FIG. 4,
- B) is sectional drawing which shows the other example of an auxiliary piston.
- A), (B) is sectional drawing which shows the structural example of a piston and an auxiliary piston.
- A), (B) is sectional drawing which shows the structural example of a piston and an auxiliary piston.
- 1 and 2 includes a housing 11, which includes a cylinder case 12, a motor case 13 continuing to the cylinder case 12, a handle 14 continuing to the cylinder case 12, and a handle. 14 and a mounting portion 15 that continues to the motor case 13.
- a cylindrical cylinder 16 is provided in the cylinder case 12.
- the cylinder 16 is made of metal, and a piston 18 is disposed in the cylinder 16 so as to be able to reciprocate.
- the operating direction of the piston 18 is the direction of the center line B1 of the cylinder 16.
- a driver blade 23 is attached to the piston 18.
- a pressure accumulating container 19 is provided in the cylinder case 12, and the pressure accumulating container 19 and the cylinder 16 are connected by a connecting member 20.
- the connecting member 20 is annular, and a pneumatic chamber 21 is formed from the pressure accumulating container 19 to the cylinder 16.
- the pneumatic chamber 21 is connected to the inside of the cylinder 16 and contains air that is a compressible fluid.
- a holder 24 is provided in the housing 11. The cylinder 16 is positioned by the connecting member 20 and the holder 24 in the center line B1 direction and the radial direction. The holder 24 is disposed at a position opposite to the position where the pressure accumulating container 19 is disposed in the direction of the center line B1 of the cylinder 16.
- the holder 24 supports the bumper 25, and the bumper 25 is integrally formed of a rubber-like elastic body.
- a shaft hole 24 a is provided in the holder 24, and a guide hole 26 is provided in the bumper 25.
- the driver blade 23 is made of metal, and the driver blade 23 is movable in the direction of the center line B1 within the shaft hole 24a and the guide hole 26.
- An accommodating portion 37 is provided at the end of the cylinder case 12, and the accommodating portion 37 is continuous with the motor case 13.
- An injection unit 27 is attached to the storage unit 37.
- An injection path 31 is provided in the injection unit 27.
- the injection path 31 is a guide hole arranged along the direction of the center line B1.
- the driver blade 23 can reciprocate in the direction of the center line B1 in the injection path 31.
- the driver blade 23 has a rectangular outer shape in plan view perpendicular to the center line B1.
- the driver blade 23 is disposed across the cylinder 16, the guide hole 26, the shaft hole 24 a, and the injection path 31.
- a push rod 32 is attached to the injection unit 27.
- the push rod 32 is disposed outside the injection unit 27, and the push rod 32 is movable in the direction of the center line B1 with respect to the injection unit 27.
- the tip of the push rod 32 is pressed against the driven member.
- an injection port 31 a is provided at a location closest to the tip of the push rod 32.
- the push rod 32 is pushed away from the bumper 25 by the force of a compression coil spring (not shown), that is, pressed downward in FIG.
- a power mechanism 76 is provided in the accommodating portion 37.
- the power mechanism 76 operates the driver blade 23 in a direction approaching the pneumatic chamber 21 against the force of the pneumatic chamber 21.
- the configuration of the power mechanism 76 will be described.
- a rotation element 38 is provided in the accommodating portion 37. The rotation element 38 is fixed to a drive shaft 39, and the drive shaft 39 is supported by two bearings 40 so as to be rotatable about the center line B2.
- the center line B2 is arranged so as to intersect with the center line B1 in a side view of the driving machine 10 shown in FIG.
- FIG. 1 shows an example in which the center line B1 and the center line B2 are at right angles, the center line B1 and the center line B2 need not be at right angles.
- the center line B1 and the center line B2 do not intersect.
- a pinion pin 41 is provided on the rotating element 38.
- a plurality of pinion pins 41 are arranged at intervals in the rotation direction of the rotating element 38. *
- a rack 42 is provided on the side edge of the driver blade 23 along the direction of the center line B1.
- the rack 42 is configured such that convex portions and concave portions are alternately arranged at a constant interval in the direction of the center line B1, and the pinion pins 41 can be engaged with and detached from the rack 42.
- the rotating element 38, the pinion pins 41, and the rack 42 constitute a power mechanism 76.
- An electric motor 43 that rotates the rotating element 38 is provided.
- the electric motor 43 is provided in the motor case 13.
- the electric motor 43 includes a stator that is fixed to the motor case 13 and a rotor that is rotatably provided in the motor case 13.
- a planetary gear type speed reducer 46 is provided in the accommodating portion 37, and an input shaft of the speed reducer 46 is connected to the rotor.
- the output shaft of the speed reducer 46 is connected to the drive shaft 39.
- a battery 47 is attached to the mounting portion 15.
- the battery 47 can be attached to and detached from the mounting portion 15, and the battery 47 supplies power to the electric motor 43.
- the battery 47 includes a storage case and a plurality of battery cells stored in the storage case.
- the battery cell is a secondary battery composed of a lithium ion battery, a nickel hydrogen battery, a lithium ion polymer battery, a nickel cadmium battery, or the like.
- a magazine 49 that houses a plurality of stoppers 48 is provided, and the magazine 49 is fixed to the housing 11 and the injection unit 27.
- the magazine 49 is provided with a feeding mechanism, and the feeding mechanism supplies the stopper 48 accommodated in the magazine 49 to the injection path 31.
- the stopper 48 is an axial nail.
- a trigger 83 is provided on the handle 14, and a trigger switch for detecting whether or not an operating force is applied to the trigger 83 is provided.
- the injection unit 27 is provided with a pressing sensor and a rotation angle sensor.
- the pressing sensor detects whether or not the tip of the push rod 32 has been pressed against the driven member and outputs a signal.
- the rotation angle sensor detects a rotation angle of the rotation element and outputs a signal.
- a control board 84 is provided in the mounting portion 15, and a controller and an inverter circuit are provided on the control board 84.
- the inverter circuit is connected to the stator of the electric motor 43 and has a switching element.
- the controller processes signals output from the pressing sensor, the rotation angle sensor, and the trigger switch to control the inverter circuit. That is, the controller controls the rotation, stop, and rotation speed of the electric motor 43.
- the controller drives the electric motor 43 to move the piston 18 to a predetermined position, and then stops the electric motor 43.
- This control is performed regardless of whether the trigger switch is on or off. That is, the piston 18 is pushed toward the bumper 25 by the air pressure of the pneumatic chamber 21, and the piston 18 stops at the bottom dead center or stops at a predetermined position above the bottom dead center.
- the bottom dead center is a position where the piston 18 is pressed against the bumper 25.
- the predetermined position of the piston 18 is a position where the piston 18 is separated from the bumper 25.
- the controller When the controller detects that the push rod 32 is pressed against the driven member and an operation force is applied to the trigger 83, the controller rotates the electric motor 43. The rotational force of the electric motor 43 is transmitted to the rotary element 38 via the speed reducer 46. When the rotation element 38 rotates counterclockwise in FIG. 2 and the pinion pin 41 engages with the rack 42, the piston 18 rises toward the top dead center, and the pressure in the pneumatic chamber 21 rises.
- the pinion pin 41 is separated from the rack 42. Then, the piston 18 moves in the direction of the center line B ⁇ b> 1 from the top dead center to the bottom dead center due to the pressure of the pneumatic chamber 21. Then, the driver blade 23 strikes the stopper 48 in the injection path 31, and the stopper 48 is driven into the driven member from the injection port 31 a of the injection path 31.
- the controller stops the electric motor 43 after the driver blade 23 hits the stopper 48 and before or after the pinion pin 41 is engaged with the rack 42 again.
- the controller determines the timing for stopping the electric motor 43 from the rotation angle of the rotation element 38.
- the piston 18 is made of metal, and annular ribs 50, 51, 52 are provided on the outer periphery of the piston 18.
- the ribs 50, 51, 52 are arranged at intervals in the direction of the center line B1.
- the rib 51 is disposed between the rib 50 and the rib 52 in the direction of the center line B1.
- the rib 50 is disposed between the pneumatic chamber 21 and the rib 51 in the direction of the center line B1, and the rib 52 is disposed between the rib 51 and the bumper 25 in the direction of the center line B1.
- the piston 18 has an attachment groove 53 formed between the rib 50 and the rib 51 and an attachment groove 54 formed between the rib 51 and the rib 52.
- the attachment grooves 53 and 54 are formed in an annular shape around the center line B1.
- An annular seal member 55 is attached to the attachment groove 53.
- the seal member 55 is integrally formed of a rubber-like elastic body, and the cross-sectional shape of the seal member 55 in the direction along the center line B1 is an X shape.
- a slide ring 56 is attached to the attachment groove 54.
- the slide ring 56 is integrally formed of synthetic resin.
- the slide ring 56 has lower rigidity than the piston 18 and higher rigidity than the seal member 55.
- the outer diameter of the slide ring 56 is larger than the outer diameter of each of the ribs 50, 51 and 52.
- the outer peripheral surface of the slide ring 56 is flat. The slide ring 56 guides the reciprocating motion of the piston 18 inside the cylinder 16.
- a lubricating groove 57 is provided in the mounting groove 54.
- Lubricating grooves 57 are arranged at two locations at intervals in the circumferential direction around the center line B1.
- the lubrication groove 57 has an arc shape in a plan view perpendicular to the center line B1.
- a lubricant such as liquid lubricant, semi-solid grease, or solid lubricant is accommodated in the lubrication groove 57, and a slide ring 56 is attached to the attachment groove 54. That is, the lubricating groove 57 is disposed inside the slide ring 56 in the radial direction of the slide ring 56.
- the straight line C1 passing through the center of the lubricating groove 57 in the width direction and the center of the mounting groove 54 in the width direction is common.
- the width direction of the lubrication groove 57 and the width direction of the attachment groove 54 are the direction of the center line B1.
- the straight line C1 is perpendicular to the center line B1.
- a boss portion 58 is provided at an end portion of the driver blade 23, and a connection hole 59 penetrating the boss portion 58 is provided.
- the boss portion 58 can also be grasped as a coupling portion.
- the center line B ⁇ b> 1 is at the center of the connecting hole 59.
- a connecting hole 60 that penetrates the piston 18 in the radial direction is provided.
- the connection hole 60 is provided in the arrangement region of the attachment groove 54 in the direction of the center line B1.
- the two openings 60 ⁇ / b> A of the connection hole 60 are disposed on the outer peripheral surface of the piston 18, specifically, the bottom surface of the attachment groove 54.
- the lubrication groove 57 is disposed between the two openings 60 ⁇ / b> A in the circumferential direction of the piston 18. Further, an insertion hole 85 is provided in the piston 18. The insertion hole 85 reaches from the end surface 52A of the rib 52 to a location corresponding to the rib 51 in the direction of the center line B1. The insertion hole 85 has a depth in the direction of the center line B ⁇ b> 1, and the boss portion 58 is disposed in the insertion hole 85.
- connection holes 59 and 60 are in the same position in the direction of the center line B1, and the connection holes 59 and 60 are circular in a side view in the direction of the center line B1. Furthermore, the inner diameter of the connection hole 59 and the inner diameter of the connection hole 60 are the same. Cylindrical pins 61 are arranged in the connecting holes 59 and 60.
- the pin 61 is made of metal.
- the length of the pin 61 is equal to or less than the diameter of the bottom surface of the mounting groove 54, and the slide ring 56 prevents the pin 61 from coming out of the connection holes 59 and 60.
- the pin 61 positions and fixes the piston 18 and the driver blade 23 in the direction of the center line B1. In the direction of the center line B1, the center line C2 and the straight line C1 of the pin 61 are arranged at different positions.
- the pin 61 and the boss portion 58 are disposed inside the attachment groove 54 in the radial direction of the piston 18.
- the seal member 55 contacts the inner peripheral surface of the cylinder 16 to form a seal surface. That is, the seal member 55 maintains the airtightness of the pneumatic chamber 21.
- the piston 18 reciprocates in the direction of the center line B ⁇ b> 1 in a state where the outer peripheral surface of the slide ring 56 is in contact with the inner peripheral surface of the cylinder 16. Therefore, in either case where the piston 18 moves from the top dead center toward the bottom dead center, or in the case where the piston 18 moves from the bottom dead center toward the top dead center, the piston 18, specifically, The ribs 50, 51, 52 can be prevented from contacting the inner peripheral surface of the cylinder 16.
- the connecting mechanism for connecting the piston 18 and the driver blade 23, that is, the boss portion 58 and the pin 61 are arranged in the arrangement region of the piston 18 in a side view of the piston 18 including the center line B1. More specifically, a part of the coupling mechanism does not have to protrude from the end face 52A in the direction of the center line B1. For this reason, it can suppress that piston 18 enlarges in the direction of centerline B1. Further, the end surface 52A can be made flat, and the contact area between the piston 18 and the bumper 25 can be made relatively wide. Furthermore, it can suppress that the rigidity of the connection mechanism of the piston 18 and the driver blade 23 falls.
- the distance between the center of the piston 18 in the direction of the center line B1 and the center line C2 of the pin 61 is relatively short. This is because the pin 61 is arranged in the arrangement area of the piston 18. For this reason, when the reaction force when hitting the stopper 48 with the driver blade 23 or the pushing force applied to the driver blade 23 from the rotating element 38 is transmitted to the piston 18 via the pin 61, the pin 61 As a result, an increase in rotational moment generated by the piston 18 can be suppressed. Therefore, the piston 18 can be prevented from tilting with respect to the center line B1 of the cylinder 16.
- the lubricant is accommodated in the lubrication groove 57, the lubricant is supplied to the contact surface between the slide ring 56 and the cylinder 16 and the contact surface between the seal member 55 and the cylinder 16. Therefore, wear and seizure of the cylinder 16, the slide ring 56, and the seal member 55 can be suppressed, and durability of the cylinder 16, the slide ring 56, and the seal member 55 is improved.
- the width of the slide ring 56 can be made relatively wide and the width of the lubricating groove 57 can be secured. Accordingly, it is possible to suppress a decrease in performance in which the lubricant lubricates the seal member 55, the slide ring 56, and the cylinder 16. Moreover, since the inclination of the piston 18 is suppressed by the single slide ring 56, the piston 18 can be prevented from being enlarged in the direction of the center line B1.
- FIG. 4 shows another example of the driving machine 10. 4, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals.
- the piston 18 and the driver blade 23 shown in FIG. 4 are connected by a pin 61 as shown in FIG. That is, the coupling mechanism between the piston 18 and the driver blade 23 is the same as the coupling mechanism shown in FIG.
- the driving machine 10 shown in FIG. 4 has an auxiliary piston 70 provided in the cylinder 16, and the auxiliary piston 70 is made of metal.
- the auxiliary piston 70 is disposed between the piston 18 and the air pressure chamber 21 in the direction of the center line B1, and is movable in the direction of the center line B1.
- the auxiliary piston 70 includes annular ribs 71 and 72 and an attachment groove 73 provided between the rib 71 and the rib 72.
- the ribs 71 and 72 are arranged at different positions in the direction of the center line B1.
- the rib 72 is disposed between the rib 71 and the piston 18 in the center line direction.
- a seal member 74 is attached to the attachment groove 73.
- the material and shape of the seal member 74 are the same as those of the seal member 55.
- the seal member 74 is in contact with the inner peripheral surface of the cylinder 16 to form a seal surface, and ensures the airtightness of the pneumatic chamber 21.
- a lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70.
- a lubricant is contained in the lubrication chamber 75.
- the lubricant stored in the lubrication chamber 75 may be the same as or different from the lubricant stored in the lubrication groove 57.
- the auxiliary piston 70 is always at the piston 18 by the pressure of the pneumatic chamber 21. It is energized towards. Further, the moving force of the piston 18 is transmitted to the auxiliary piston 70 via the lubrication chamber 75 in the stroke in which the driver blade 23 and the piston 18 are lifted by the rotational force of the rotating element 38. For this reason, the auxiliary piston 70 rises together with the piston 18 and the pressure in the pneumatic chamber 21 rises.
- the lubricant in the lubrication chamber 75 is supplied to the contact portion between the seal members 55 and 74 and the cylinder 16 to lubricate the contact portion. Therefore, the durability of the seal members 55 and 74 and the cylinder 16 is improved.
- FIG. 5B shows another structural example of the auxiliary piston 70.
- the auxiliary piston 70 has an oil supply hole 77.
- the oil supply hole 77 passes through the auxiliary piston 70 in the direction of the center line B ⁇ b> 1, and a female screw is provided on the inner peripheral surface of the oil supply hole 77.
- the oil supply hole 77 is connected to the lubrication chamber 75, and a plug 78 that closes the oil supply hole 77 is provided.
- a male screw is provided on the outer peripheral surface of the plug 78, and when the plug 78 is tightened and fixed to the auxiliary piston 70, the plug 78 closes the oil supply hole 77.
- the lubricant can be supplied from the oil supply hole 77 to the lubrication chamber 75 and the oil supply hole 77 can be closed by the plug 78.
- the structures of the auxiliary piston 70 and the piston 18 shown in FIG. 5B are the same as the structures of the auxiliary piston 70 and the piston 18 shown in FIGS. 3, 4, and 5A.
- the connection mechanism between the piston 18 and the driver blade 23 shown in FIG. 5B is the same as the connection mechanism between the piston 18 and the driver blade 23 shown in FIG.
- the action and effect of the piston 18 shown in FIG. 5B are the same as the action and effect of the piston 18 shown in FIG.
- the operation and effect of the auxiliary piston 70 shown in FIG. 5B are the same as the operation and effect of the auxiliary piston 70 shown in FIGS. 4 and 5A.
- the lubricant can be supplied from the oil supply hole 77 to the lubrication chamber 75 in a state where the plug 78 is not attached to the auxiliary piston 70.
- FIG. 6A shows another example of the piston 18 and the auxiliary piston 70.
- the piston 18 shown in FIG. 6A and the auxiliary piston 70 are connected by a connecting portion 80.
- the piston 18, the connection portion 80, and the auxiliary piston 70 are integrally formed of a metal material.
- the connection part 80 is provided centering on the center line B1, and the outer diameter of the connection part 80 is smaller than the outer diameter of the piston 18 and the outer diameter of the auxiliary piston 70.
- a lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70, that is, around the connection portion 80.
- the lubrication chamber 75 is annular, and the lubricant is accommodated in the lubrication chamber 75.
- An oil supply hole 77 is provided in the auxiliary piston 70, and the arrangement region of the oil supply hole 77 is different from the arrangement region of the connecting portion 80 in a plan view of the auxiliary piston 70.
- FIG. 6 is an example in which a plurality of oil supply holes 77 are provided, and the plurality of oil supply holes 77 are respectively closed by plugs 78.
- the piston 18 shown in FIG. 6A can obtain the same effect as the piston 18 shown in FIG.
- the auxiliary piston 70 shown in FIG. 6 (A) can obtain the same effect as the auxiliary piston 70 shown in FIG. 5 (B).
- the piston 18 and the auxiliary piston 70 shown in FIG. Therefore, the coaxiality between the piston 18 and the auxiliary piston 70 can be ensured, and the piston 18 and the auxiliary piston 70 can be prevented from being inclined with respect to the center line B1. Further, the piston 18 and the auxiliary piston 70 move and stop simultaneously in the direction of the center line B1.
- FIG. 6B shows another structural example of the auxiliary piston 70.
- the piston 18 and the auxiliary piston 70 are not connected.
- the auxiliary piston 70 shown in FIG. 6B has a convex portion 81 that protrudes from a location closest to the piston 18.
- the convex portion 81 is provided around the center line B1 and protrudes in the direction of the center line B1.
- a lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70. For this reason, when the convex part 81 contacts the piston 18, the minimum value of the interval between the piston 18 and the auxiliary piston 70 in the direction of the center line B1 is determined.
- the piston 18 shown in FIG. 6B can obtain the same effect as the piston 18 shown in FIG. Moreover, the auxiliary piston 70 shown in FIG. 6 (B) can obtain the same effect as the auxiliary piston 70 shown in FIG. 5 (B).
- the auxiliary piston 70 shown in FIG. For this reason, the moving force of the piston 18 is transmitted to the auxiliary piston 70 through the convex portion 81 in the stroke in which the piston 18 moves up. Further, the moving force of the auxiliary piston 70 is transmitted to the piston 18 via the convex portion 81 in the stroke in which the auxiliary piston 70 is lowered by the pressure of the pneumatic chamber 21.
- FIG. 7A shows another example of the piston 18.
- the piston 18 and the auxiliary piston 70 are not connected.
- the piston 18 shown in FIG. 7A has a protrusion 82 that protrudes from a location closest to the auxiliary piston 70.
- the convex part 82 is provided centering on the center line B1, and protrudes in the center line B1 direction.
- the auxiliary piston 70 does not include the convex portion 81.
- a lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70. For this reason, when the convex part 82 contacts the auxiliary piston 70, the minimum value of the interval between the piston 18 and the auxiliary piston 70 in the direction of the center line B1 is determined.
- the piston 18 shown in FIG. 7A can obtain the same effect as the piston 18 shown in FIG. Further, the auxiliary piston 70 shown in FIG. 7A can obtain the same effects as the auxiliary piston 70 shown in FIG.
- the moving force of the piston 18 is transmitted to the auxiliary piston 70 through the convex portion 82 in the stroke in which the piston 18 moves up. Further, the moving force of the auxiliary piston 70 is transmitted to the piston 18 through the convex portion 82 in the stroke in which the auxiliary piston 70 is lowered by the pressure of the pneumatic chamber 21.
- FIG. 7B shows a combination example of the piston 18 and the auxiliary piston 70.
- the piston 18 has the convex part 82 similarly to the piston 18 of FIG.
- the auxiliary piston 70 has the convex part 81 similarly to the auxiliary piston 70 of FIG.
- a lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70.
- the convex portion 81 and the convex portion 82 come into contact with each other, and the minimum value of the distance between the piston 18 and the auxiliary piston 70 in the center line B1 direction is determined.
- the effect of the piston 18 in FIG. 7B is the same as the effect of the piston 18 in FIGS. 3 and 7.
- the effect of the auxiliary piston 70 in FIG. 7B is the same as the effect of the piston 18 in FIGS. 5 and 6B.
- the driver blade 23 is the striker of the present invention
- the piston 18 is the piston of the present invention
- the cylinder 16 corresponds to the cylinder of the present invention
- the pneumatic chamber 21 corresponds to the pressure chamber of the present invention
- the seal member 55 corresponds to the first seal member of the present invention
- the slide ring 56 corresponds to the ring member of the present invention.
- the lubricating groove 57 corresponds to the first holding portion of the present invention
- the boss portion 58 and the pin 61 correspond to the connecting mechanism of the present invention
- the connecting hole 60 corresponds to the connecting hole of the present invention.
- the opening 60A corresponds to the opening of the present invention
- the auxiliary piston 70 corresponds to the auxiliary piston of the present invention
- the lubrication chamber 75 corresponds to the second holding portion of the present invention
- the seal member 74 It corresponds to the second seal member of the present invention and the oil supply hole 77.
- the plug 78 corresponds to the plug of the present invention
- the connecting portion 80 corresponds to the connecting portion of the present invention
- the convex portion 81 corresponds to the first convex portion of the present invention.
- the convex part 82 is equivalent to the 2nd convex part of this invention
- hub part 58 is equivalent to the coupling
- the driving machine of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof.
- it includes a driving machine that supplies compressed air generated by a compressor to an air pressure chamber via an air hose.
- the electric motor described in the embodiment includes a DC motor using a battery as a DC power source as a power source and an AC motor using an AC power source.
- the motor may be any one of a hydraulic motor, a pneumatic motor, and an internal combustion engine instead of the electric motor.
- the connection hole provided in the piston includes a structure that penetrates the piston in the radial direction and a structure that does not penetrate the piston in the radial direction.
- the opening of the connecting hole is arranged at one place on the outer peripheral surface of the piston.
- a 1st holding groove is arrange
- the coupling portion provided on the driver blade is a portion that connects the piston and the driver blade.
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- Portable Nailing Machines And Staplers (AREA)
Abstract
Provided is a driver configured so that the size of a piston will not increase in a center axis direction. A driver (10) has: a driver blade (23) for impacting a fastener (48); a piston (18) to which the driver blade (23) is mounted; a cylinder (16) in which the piston (18) is accommodated so that the piston (18) can reciprocate; and an air pressure chamber (21) for impacting the piston (18). The driver (10) further has: a seal member (55) provided on the outer peripheral surface of the piston (18) and in contact with the cylinder (16); and a slide ring (56) provided on the outer peripheral surface of the piston (18) and guiding the reciprocal movement of the piston (18) within the cylinder (16).
Description
本発明は、圧力室の圧力でピストンを動作させて止具を打撃する打込機に関する。
The present invention relates to a driving machine that operates a piston with the pressure of a pressure chamber to hit a stopper.
止具を被打込部材へ打ち込む打込機が、特許文献1に記載されている。特許文献1に記載された打込機は、中空のハウジングと、ハウジング内に設けたシリンダと、シリンダ内に移動可能に収容したピストンと、ピストンの外周面に設けた溝と、溝に取り付けたOリングと、を有する。また、打込機は、ピストンに固定したドライバと、ハウジング内に設けたピストンストップと、ピストンストップに設けた環状シール面と、ハウジング内に形成した流路と、流路に接続されたエア通路と、ハウジング内に設けたバルブ機構と、バルブ機構を動作させるバルブステムと、を有する。また、打込機は、バルブステムを動作させるトリガレバー及びコンタクトアームを有する。
A driving machine for driving a stopper into a driven member is described in Patent Document 1. The driving machine described in Patent Document 1 is attached to a hollow housing, a cylinder provided in the housing, a piston movably accommodated in the cylinder, a groove provided on the outer peripheral surface of the piston, and the groove. An O-ring. The driving machine includes a driver fixed to the piston, a piston stop provided in the housing, an annular seal surface provided in the piston stop, a flow path formed in the housing, and an air passage connected to the flow path. And a valve mechanism provided in the housing, and a valve stem for operating the valve mechanism. The driving machine has a trigger lever and a contact arm for operating the valve stem.
特許文献1に記載された打込機は、バルブ機構が動作していない場合、ピストンはシリンダ内で上死点に近い位置に配置されている。ピストンが上死点に近い位置に停止していると、ピストンが環状シール面に密着している。バルブ機構が動作すると、圧縮空気がエア通路及び流路を介してピストンの溝内に進入する。溝内の圧力はOリングに加わり、ピストンを下死点に向けて動作させようとするとする力が働く。Oリングとシリンダの内面との摩擦力で、ピストンは停止している。
In the driving machine described in Patent Document 1, when the valve mechanism is not operating, the piston is disposed in the cylinder at a position close to top dead center. When the piston stops at a position close to top dead center, the piston is in close contact with the annular seal surface. When the valve mechanism operates, the compressed air enters the piston groove through the air passage and the flow path. The pressure in the groove is applied to the O-ring, and a force acts to move the piston toward the bottom dead center. The piston is stopped by the frictional force between the O-ring and the inner surface of the cylinder.
その後、ピストンを下死点に向けて移動させようとする力が、Oリングとシリンダとの接触箇所で生じる摩擦力を超えると、ピストンが移動して環状シール面から離れる。すると、圧縮空気がピストンの上面と、ピストンストップとの間に進入する。その結果、圧縮空気の圧力がピストンの上面全体に作用し、ピストンは下死点に向けて動作し、ドライバが釘を打ち込む。
After that, when the force to move the piston toward the bottom dead center exceeds the frictional force generated at the contact point between the O-ring and the cylinder, the piston moves and leaves the annular seal surface. Then, the compressed air enters between the upper surface of the piston and the piston stop. As a result, the pressure of the compressed air acts on the entire upper surface of the piston, the piston moves toward the bottom dead center, and the driver drives the nail.
しかし、特許文献1に記載された打込機は、ピストンがシリンダに対して傾斜することを防止するために、ピストンの外周面にリング部材を取り付けると、中心線方向にピストンが大型化する可能性があった。
However, in the driving machine described in Patent Document 1, if a ring member is attached to the outer peripheral surface of the piston in order to prevent the piston from being inclined with respect to the cylinder, the piston can be enlarged in the center line direction. There was sex.
本発明の目的は、ピストンが中心線方向に大型化することを抑制できる打込機を提供することにある。
The objective of this invention is providing the driving device which can suppress that a piston enlarges in a center line direction.
一実形態の発明は、打撃子を取り付けたピストンと、前記ピストンが往復動作可能に収容されたシリンダと、前記シリンダの内部につながり、かつ、前記ピストンを打撃する圧力室と、を有する打込機であって、前記ピストンの外周面に設けられ、かつ、前記シリンダに接触する第1シール部材と、前記ピストンの外周面に設けられ、かつ、前記シリンダの内部における前記ピストンの往復動作をガイドするスライドリングと、を有する。
An embodiment of the invention includes a piston having a striking element attached thereto, a cylinder in which the piston is accommodated so as to be able to reciprocate, and a pressure chamber connected to the inside of the cylinder and striking the piston. A first seal member provided on the outer peripheral surface of the piston and contacting the cylinder; and provided on the outer peripheral surface of the piston and guiding reciprocation of the piston inside the cylinder. And a slide ring.
本発明の打込機は、ピストンにスライドリングが設けられているため、ピストンが中心線方向に大型化することを抑制できる。
In the driving machine according to the present invention, since the piston is provided with the slide ring, the piston can be prevented from being enlarged in the center line direction.
以下、本発明の実施の形態を図面に基づいて詳細に説明する。それぞれの図において、共通する部材には同一の符号が付されている。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, the same code | symbol is attached | subjected to the common member.
図1及び図2に示される打込機10はハウジング11を有し、ハウジング11は、シリンダケース12と、シリンダケース12に連続するモータケース13と、シリンダケース12に連続するハンドル14と、ハンドル14及びモータケース13に連続する装着部15と、を有する。シリンダケース12内に円筒形状のシリンダ16が設けられている。シリンダ16は金属製であり、シリンダ16内にピストン18が往復動作可能に配置されている。ピストン18の動作方向は、シリンダ16の中心線B1方向である。ピストン18にドライバブレード23が取り付けられている。
1 and 2 includes a housing 11, which includes a cylinder case 12, a motor case 13 continuing to the cylinder case 12, a handle 14 continuing to the cylinder case 12, and a handle. 14 and a mounting portion 15 that continues to the motor case 13. A cylindrical cylinder 16 is provided in the cylinder case 12. The cylinder 16 is made of metal, and a piston 18 is disposed in the cylinder 16 so as to be able to reciprocate. The operating direction of the piston 18 is the direction of the center line B1 of the cylinder 16. A driver blade 23 is attached to the piston 18.
シリンダケース12内に蓄圧容器19が設けられ、蓄圧容器19とシリンダ16とが、連結部材20により連結されている。連結部材20は環状であり、蓄圧容器19内からシリンダ16内に亘って空気圧室21が形成される。空気圧室21は、シリンダ16の内部につながり、かつ、圧縮性流体である空気が収容されている。ハウジング11内にホルダ24が設けられている。シリンダ16は、連結部材20及びホルダ24により中心線B1方向及び径方向に位置決めされている。ホルダ24は、シリンダ16の中心線B1方向で、蓄圧容器19が配置された箇所とは反対の箇所に配置されている。
A pressure accumulating container 19 is provided in the cylinder case 12, and the pressure accumulating container 19 and the cylinder 16 are connected by a connecting member 20. The connecting member 20 is annular, and a pneumatic chamber 21 is formed from the pressure accumulating container 19 to the cylinder 16. The pneumatic chamber 21 is connected to the inside of the cylinder 16 and contains air that is a compressible fluid. A holder 24 is provided in the housing 11. The cylinder 16 is positioned by the connecting member 20 and the holder 24 in the center line B1 direction and the radial direction. The holder 24 is disposed at a position opposite to the position where the pressure accumulating container 19 is disposed in the direction of the center line B1 of the cylinder 16.
ホルダ24はバンパ25を支持し、バンパ25はゴム状弾性体により一体成形されている。ホルダ24に軸孔24aが設けられ、バンパ25にガイド孔26が設けられている。ドライバブレード23は金属製であり、ドライバブレード23は、軸孔24a及びガイド孔26内で中心線B1方向に移動可能である。ピストン18及びドライバブレード23が動作して、ピストン18がバンパ25に衝突すると、バンパ25は衝撃荷重を減衰及び低減する。
The holder 24 supports the bumper 25, and the bumper 25 is integrally formed of a rubber-like elastic body. A shaft hole 24 a is provided in the holder 24, and a guide hole 26 is provided in the bumper 25. The driver blade 23 is made of metal, and the driver blade 23 is movable in the direction of the center line B1 within the shaft hole 24a and the guide hole 26. When the piston 18 and the driver blade 23 operate and the piston 18 collides with the bumper 25, the bumper 25 attenuates and reduces the impact load.
シリンダケース12の端部に収容部37が設けられ、収容部37はモータケース13に連続している。収容部37に射出部27が取り付けられている。射出部27に射出路31が設けられている。射出路31は、中心線B1方向に沿って配置されたガイド孔である。ドライバブレード23は、射出路31内で中心線B1方向に往復動可能である。中心線B1に対して垂直な平面視で、ドライバブレード23の外周形状は長方形である。ドライバブレード23は、シリンダ16、ガイド孔26、軸孔24a、射出路31に亘って配置されている。
An accommodating portion 37 is provided at the end of the cylinder case 12, and the accommodating portion 37 is continuous with the motor case 13. An injection unit 27 is attached to the storage unit 37. An injection path 31 is provided in the injection unit 27. The injection path 31 is a guide hole arranged along the direction of the center line B1. The driver blade 23 can reciprocate in the direction of the center line B1 in the injection path 31. The driver blade 23 has a rectangular outer shape in plan view perpendicular to the center line B1. The driver blade 23 is disposed across the cylinder 16, the guide hole 26, the shaft hole 24 a, and the injection path 31.
射出部27にプッシュロッド32が取り付けられている。プッシュロッド32は、射出部27の外に配置され、プッシュロッド32は、射出部27に対して中心線B1方向に移動可能である。プッシュロッド32の先端は、被打込部材へ押し付けられる。射出路31のうち、プッシュロッド32の先端に最も近い箇所に射出口31aが設けられている。プッシュロッド32は、図示されていない圧縮コイルばねの力でバンパ25から離れる向き、つまり、図2で下方へ押されている。
A push rod 32 is attached to the injection unit 27. The push rod 32 is disposed outside the injection unit 27, and the push rod 32 is movable in the direction of the center line B1 with respect to the injection unit 27. The tip of the push rod 32 is pressed against the driven member. In the injection path 31, an injection port 31 a is provided at a location closest to the tip of the push rod 32. The push rod 32 is pushed away from the bumper 25 by the force of a compression coil spring (not shown), that is, pressed downward in FIG.
収容部37に動力機構76が設けられている。動力機構76は、ドライバブレード23を空気圧室21の力に抗して、空気圧室21に近づく向きで動作させる。動力機構76の構成を説明する。収容部37内に回転要素38が設けられている。回転要素38は、駆動軸39に固定されており、駆動軸39は2個の軸受40により、中心線B2を中心として回転自在に支持されている。
A power mechanism 76 is provided in the accommodating portion 37. The power mechanism 76 operates the driver blade 23 in a direction approaching the pneumatic chamber 21 against the force of the pneumatic chamber 21. The configuration of the power mechanism 76 will be described. A rotation element 38 is provided in the accommodating portion 37. The rotation element 38 is fixed to a drive shaft 39, and the drive shaft 39 is supported by two bearings 40 so as to be rotatable about the center line B2.
中心線B2は、図1に示す打込機10の側面視で、中心線B1と交差して配置されている。図1では、中心線B1と中心線B2とが直角である例が示されているが、中心線B1と中心線B2とが直角でなくともよい。なお、図2のように打込機10を正面視すると、中心線B1と中心線B2とは交差しない。回転要素38にピニオンピン41が設けられている。ピニオンピン41は、回転要素38の回転方向に間隔をおいて複数配置されている。
The center line B2 is arranged so as to intersect with the center line B1 in a side view of the driving machine 10 shown in FIG. Although FIG. 1 shows an example in which the center line B1 and the center line B2 are at right angles, the center line B1 and the center line B2 need not be at right angles. When the driving machine 10 is viewed from the front as shown in FIG. 2, the center line B1 and the center line B2 do not intersect. A pinion pin 41 is provided on the rotating element 38. A plurality of pinion pins 41 are arranged at intervals in the rotation direction of the rotating element 38. *
一方、ドライバブレード23の側縁に、中心線B1方向に沿ってラック42が設けられている。ラック42は、凸部と凹部とを、中心線B1方向に一定の間隔で交互に配置したものであり、ピニオンピン41はラック42に係合及び離脱が可能である。回転要素38、ピニオンピン41、ラック42が、動力機構76を構成している。
On the other hand, a rack 42 is provided on the side edge of the driver blade 23 along the direction of the center line B1. The rack 42 is configured such that convex portions and concave portions are alternately arranged at a constant interval in the direction of the center line B1, and the pinion pins 41 can be engaged with and detached from the rack 42. The rotating element 38, the pinion pins 41, and the rack 42 constitute a power mechanism 76.
回転要素38を回転する電動モータ43が設けられている。電動モータ43は、モータケース13内に設けられている。電動モータ43は、モータケース13に固定されるステータと、モータケース13内に回転自在に設けられたロータと、を有する。遊星歯車式の減速機46が収容部37内に設けられており、減速機46の入力軸はロータに連結されている。減速機46の出力軸は駆動軸39に連結されている。
An electric motor 43 that rotates the rotating element 38 is provided. The electric motor 43 is provided in the motor case 13. The electric motor 43 includes a stator that is fixed to the motor case 13 and a rotor that is rotatably provided in the motor case 13. A planetary gear type speed reducer 46 is provided in the accommodating portion 37, and an input shaft of the speed reducer 46 is connected to the rotor. The output shaft of the speed reducer 46 is connected to the drive shaft 39.
装着部15にバッテリ47が取り付けられている。バッテリ47は、装着部15へ取り付け及び取り外しが可能であり、バッテリ47は電動モータ43に電力を供給する。バッテリ47は、収容ケースと、収容ケース内に収容された複数の電池セルと、を有する。電池セルは、リチウムイオン電池、ニッケル水素電池、リチウムイオンポリマー電池、ニッケルカドミウム電池等からなる二次電池である。
A battery 47 is attached to the mounting portion 15. The battery 47 can be attached to and detached from the mounting portion 15, and the battery 47 supplies power to the electric motor 43. The battery 47 includes a storage case and a plurality of battery cells stored in the storage case. The battery cell is a secondary battery composed of a lithium ion battery, a nickel hydrogen battery, a lithium ion polymer battery, a nickel cadmium battery, or the like.
複数の止具48を収容するマガジン49が設けられており、マガジン49は、ハウジング11及び射出部27に固定されている。マガジン49に送り機構が設けられており、送り機構は、マガジン49に収容されている止具48を射出路31へ供給する。止具48は軸形状の釘である。
A magazine 49 that houses a plurality of stoppers 48 is provided, and the magazine 49 is fixed to the housing 11 and the injection unit 27. The magazine 49 is provided with a feeding mechanism, and the feeding mechanism supplies the stopper 48 accommodated in the magazine 49 to the injection path 31. The stopper 48 is an axial nail.
ハンドル14にトリガ83が設けられ、トリガ83に操作力が加えられているか否かを検出するトリガスイッチが設けられている。射出部27に押し付けセンサ及び回転角度センサが設けられている。押し付けセンサは、プッシュロッド32の先端が被打込部材へ押し付けられたか否かを検出して信号を出力する。回転角度センサは、回転要素の回転角度を検出して信号を出力する。
A trigger 83 is provided on the handle 14, and a trigger switch for detecting whether or not an operating force is applied to the trigger 83 is provided. The injection unit 27 is provided with a pressing sensor and a rotation angle sensor. The pressing sensor detects whether or not the tip of the push rod 32 has been pressed against the driven member and outputs a signal. The rotation angle sensor detects a rotation angle of the rotation element and outputs a signal.
装着部15内に制御基板84が設けられ、制御基板84にコントローラ、インバータ回路が設けられている。インバータ回路は、電動モータ43のステータに接続され、かつ、スイッチング素子を有する。コントローラは、押し付けセンサ及び回転角度センサ及びトリガスイッチから出力された信号を処理して、インバータ回路を制御する。つまり、コントローラは、電動モータ43の回転、停止、回転数を制御する。
A control board 84 is provided in the mounting portion 15, and a controller and an inverter circuit are provided on the control board 84. The inverter circuit is connected to the stator of the electric motor 43 and has a switching element. The controller processes signals output from the pressing sensor, the rotation angle sensor, and the trigger switch to control the inverter circuit. That is, the controller controls the rotation, stop, and rotation speed of the electric motor 43.
次に、打込機10の制御例を説明する。コントローラは、止具48が打込まれた後、電動モータ43を駆動させてピストン18を所定位置まで移動した後、電動モータ43を停止する。この制御は、トリガスイッチのオンオフに関係なく行われる。つまり、ピストン18は空気圧室21の空気圧でバンパ25に向けて押され、ピストン18が下死点で停止する、または下死点よりも上の所定位置で停止する。下死点は、ピストン18がバンパ25に押し付けられている位置である。ピストン18の所定位置は、ピストン18がバンパ25から離れた位置である。ピストン18が所定位置で停止すると、回転要素38からドライバブレード23に加わる力で、ピストン18は空気圧室21の圧力に抗して所定位置で停止する。
Next, a control example of the driving machine 10 will be described. After the stopper 48 is driven, the controller drives the electric motor 43 to move the piston 18 to a predetermined position, and then stops the electric motor 43. This control is performed regardless of whether the trigger switch is on or off. That is, the piston 18 is pushed toward the bumper 25 by the air pressure of the pneumatic chamber 21, and the piston 18 stops at the bottom dead center or stops at a predetermined position above the bottom dead center. The bottom dead center is a position where the piston 18 is pressed against the bumper 25. The predetermined position of the piston 18 is a position where the piston 18 is separated from the bumper 25. When the piston 18 stops at a predetermined position, the piston 18 stops at the predetermined position against the pressure of the pneumatic chamber 21 by the force applied from the rotating element 38 to the driver blade 23.
コントローラは、プッシュロッド32が被打込部材へ押し付けられ、かつ、トリガ83に操作力が加えられたことを検知すると、電動モータ43を回転する。電動モータ43の回転力は、減速機46を介して回転要素38へ伝達される。回転要素38が、図2で反時計方向に回転してピニオンピン41がラック42に係合すると、ピストン18が上死点へ向けて上昇し、空気圧室21の圧力が上昇する。
When the controller detects that the push rod 32 is pressed against the driven member and an operation force is applied to the trigger 83, the controller rotates the electric motor 43. The rotational force of the electric motor 43 is transmitted to the rotary element 38 via the speed reducer 46. When the rotation element 38 rotates counterclockwise in FIG. 2 and the pinion pin 41 engages with the rack 42, the piston 18 rises toward the top dead center, and the pressure in the pneumatic chamber 21 rises.
電動モータ43の回転力でピストン18が上昇して上死点に到達した後、ピニオンピン41がラック42から離れる。すると、ピストン18は、空気圧室21の圧力で上死点から下死点へ向けて中心線B1方向に移動する。そして、ドライバブレード23が、射出路31にある止具48を打撃し、射出路31の射出口31aから、止具48は被打込部材へ打ち込まれる。
After the piston 18 is raised by the rotational force of the electric motor 43 and reaches the top dead center, the pinion pin 41 is separated from the rack 42. Then, the piston 18 moves in the direction of the center line B <b> 1 from the top dead center to the bottom dead center due to the pressure of the pneumatic chamber 21. Then, the driver blade 23 strikes the stopper 48 in the injection path 31, and the stopper 48 is driven into the driven member from the injection port 31 a of the injection path 31.
また、ドライバブレード23が止具48を被打込部材へ打ち込む際に、ピストン18は余剰の運動エネルギを持っている状態で下降し、ピストン18がバンパ25に衝突し、ドライバブレード23及びピストン18の運動エネルギの一部は、バンパ25により吸収される。コントローラは、ドライバブレード23が止具48を打撃した後、ピニオンピン41がラック42へ再度噛み合う前、または噛み合った後、電動モータ43を停止する。コントローラは、電動モータ43を停止するタイミングを、回転要素38の回転角度から判断する。
Further, when the driver blade 23 drives the stopper 48 into the driven member, the piston 18 descends with a surplus kinetic energy, the piston 18 collides with the bumper 25, and the driver blade 23 and the piston 18. A part of the kinetic energy is absorbed by the bumper 25. The controller stops the electric motor 43 after the driver blade 23 hits the stopper 48 and before or after the pinion pin 41 is engaged with the rack 42 again. The controller determines the timing for stopping the electric motor 43 from the rotation angle of the rotation element 38.
次に、ピストン18の構造例を、図3を参照して説明する。ピストン18は金属製であり、ピストン18の外周に環状のリブ50,51,52が設けられている。リブ50,51,52は、中心線B1方向に間隔をおいて配置されている。リブ51は、中心線B1方向でリブ50とリブ52との間に配置されている。リブ50は、中心線B1方向で空気圧室21とリブ51との間に配置され、リブ52は、中心線B1方向でリブ51とバンパ25との間に配置されている。
Next, a structural example of the piston 18 will be described with reference to FIG. The piston 18 is made of metal, and annular ribs 50, 51, 52 are provided on the outer periphery of the piston 18. The ribs 50, 51, 52 are arranged at intervals in the direction of the center line B1. The rib 51 is disposed between the rib 50 and the rib 52 in the direction of the center line B1. The rib 50 is disposed between the pneumatic chamber 21 and the rib 51 in the direction of the center line B1, and the rib 52 is disposed between the rib 51 and the bumper 25 in the direction of the center line B1.
そして、ピストン18は、リブ50とリブ51との間に形成した取り付け溝53と、リブ51とリブ52との間に形成した取り付け溝54と、を有する。取り付け溝53,54は、中心線B1を中心として環状に形成されている。取り付け溝53に、環状のシール部材55が取り付けられている。シール部材55は、ゴム状弾性体により一体成形されており、中心線B1に沿った方向におけるシール部材55の断面形状はX字形である。
The piston 18 has an attachment groove 53 formed between the rib 50 and the rib 51 and an attachment groove 54 formed between the rib 51 and the rib 52. The attachment grooves 53 and 54 are formed in an annular shape around the center line B1. An annular seal member 55 is attached to the attachment groove 53. The seal member 55 is integrally formed of a rubber-like elastic body, and the cross-sectional shape of the seal member 55 in the direction along the center line B1 is an X shape.
取り付け溝54にスライドリング56が取り付けられている。スライドリング56は、合成樹脂で一体成形されている。スライドリング56は、ピストン18よりも剛性が低く、シール部材55よりも剛性が高い。スライドリング56の外径は、リブ50,51,52のそれぞれの外径よりも大きい。スライドリング56の外周面は平坦である。スライドリング56は、シリンダ16の内部におけるピストン18の往復動作をガイドする。
A slide ring 56 is attached to the attachment groove 54. The slide ring 56 is integrally formed of synthetic resin. The slide ring 56 has lower rigidity than the piston 18 and higher rigidity than the seal member 55. The outer diameter of the slide ring 56 is larger than the outer diameter of each of the ribs 50, 51 and 52. The outer peripheral surface of the slide ring 56 is flat. The slide ring 56 guides the reciprocating motion of the piston 18 inside the cylinder 16.
また、取り付け溝54に潤滑溝57が設けられている。潤滑溝57は、中心線B1を中心とする円周方向に間隔をおいて2箇所に配置されている。中心線B1に対して垂直な平面視で、潤滑溝57は円弧形状である。潤滑溝57に潤滑剤、例えば、液体の潤滑油、半固形のグリース、固体潤滑剤の何れかを収容し、取り付け溝54にスライドリング56が取り付けられている。つまり、潤滑溝57は、スライドリング56の径方向でスライドリング56の内側に配置されている。
A lubricating groove 57 is provided in the mounting groove 54. Lubricating grooves 57 are arranged at two locations at intervals in the circumferential direction around the center line B1. The lubrication groove 57 has an arc shape in a plan view perpendicular to the center line B1. A lubricant such as liquid lubricant, semi-solid grease, or solid lubricant is accommodated in the lubrication groove 57, and a slide ring 56 is attached to the attachment groove 54. That is, the lubricating groove 57 is disposed inside the slide ring 56 in the radial direction of the slide ring 56.
さらに、潤滑溝57の幅方向の中心、及び取り付け溝54の幅方向の中心を通る直線C1は、共通である。潤滑溝57の幅方向及び取り付け溝54の幅方向は、中心線B1方向である。直線C1は、中心線B1に対して直角である。
Furthermore, the straight line C1 passing through the center of the lubricating groove 57 in the width direction and the center of the mounting groove 54 in the width direction is common. The width direction of the lubrication groove 57 and the width direction of the attachment groove 54 are the direction of the center line B1. The straight line C1 is perpendicular to the center line B1.
さらに、ドライバブレード23の端部にボス部58が設けられ、ボス部58を貫通する連結孔59が設けられている。ボス部58は、結合部として把握することもできる。ピストン18の平面視で、中心線B1は、連結孔59の中心にある。また、ピストン18を径方向に貫通する連結孔60が設けられている。連結孔60は、中心線B1方向で取り付け溝54の配置領域内に設けられている。連結孔60の2つの開口部60Aは、ピストン18の外周面、具体的には、取り付け溝54の底面に配置されている。潤滑溝57は、ピストン18の円周方向で、2つの開口部60Aの間に配置されている。さらに、ピストン18に挿入孔85が設けられている。挿入孔85は、リブ52の端面52Aから、中心線B1方向でリブ51に相当する箇所まで到達している。挿入孔85は、中心線B1方向の深さを有し、ボス部58は挿入孔85に配置されている。
Further, a boss portion 58 is provided at an end portion of the driver blade 23, and a connection hole 59 penetrating the boss portion 58 is provided. The boss portion 58 can also be grasped as a coupling portion. In the plan view of the piston 18, the center line B <b> 1 is at the center of the connecting hole 59. Further, a connecting hole 60 that penetrates the piston 18 in the radial direction is provided. The connection hole 60 is provided in the arrangement region of the attachment groove 54 in the direction of the center line B1. The two openings 60 </ b> A of the connection hole 60 are disposed on the outer peripheral surface of the piston 18, specifically, the bottom surface of the attachment groove 54. The lubrication groove 57 is disposed between the two openings 60 </ b> A in the circumferential direction of the piston 18. Further, an insertion hole 85 is provided in the piston 18. The insertion hole 85 reaches from the end surface 52A of the rib 52 to a location corresponding to the rib 51 in the direction of the center line B1. The insertion hole 85 has a depth in the direction of the center line B <b> 1, and the boss portion 58 is disposed in the insertion hole 85.
連結孔59,60は中心線B1方向で同じ位置にあり、かつ、中心線B1方向の側面視で、連結孔59,60は円形である。さらに、連結孔59の内径と、連結孔60の内径とが同一である。連結孔59,60に円柱形状のピン61が配置されている。ピン61は金属製である。ピン61の長さは、取り付け溝54の底面の直径以下であり、スライドリング56は、ピン61が連結孔59,60から抜けることを防止する。ピン61は、ピストン18とドライバブレード23とを中心線B1方向に位置決めし、かつ、固定する。中心線B1方向で、ピン61の中心線C2と直線C1とは、異なる位置に配置されている。ピン61及びボス部58は、ピストン18の径方向で取り付け溝54の内側に配置されている。
The connection holes 59 and 60 are in the same position in the direction of the center line B1, and the connection holes 59 and 60 are circular in a side view in the direction of the center line B1. Furthermore, the inner diameter of the connection hole 59 and the inner diameter of the connection hole 60 are the same. Cylindrical pins 61 are arranged in the connecting holes 59 and 60. The pin 61 is made of metal. The length of the pin 61 is equal to or less than the diameter of the bottom surface of the mounting groove 54, and the slide ring 56 prevents the pin 61 from coming out of the connection holes 59 and 60. The pin 61 positions and fixes the piston 18 and the driver blade 23 in the direction of the center line B1. In the direction of the center line B1, the center line C2 and the straight line C1 of the pin 61 are arranged at different positions. The pin 61 and the boss portion 58 are disposed inside the attachment groove 54 in the radial direction of the piston 18.
ピストン18がシリンダ16内に配置された状態で、シール部材55はシリンダ16の内周面に接触してシール面を形成する。つまり、シール部材55は、空気圧室21の気密性を保持する。また、ピストン18は、スライドリング56の外周面がシリンダ16の内周面に接触した状態で、中心線B1方向に往復動する。このため、ピストン18が上死点から下死点に向けて移動する場合、または、ピストン18が下死点から上死点に向けて移動する場合の何れにおいても、ピストン18、具体的には、リブ50,51,52がシリンダ16の内周面に接触することを防止できる。
In a state where the piston 18 is disposed in the cylinder 16, the seal member 55 contacts the inner peripheral surface of the cylinder 16 to form a seal surface. That is, the seal member 55 maintains the airtightness of the pneumatic chamber 21. The piston 18 reciprocates in the direction of the center line B <b> 1 in a state where the outer peripheral surface of the slide ring 56 is in contact with the inner peripheral surface of the cylinder 16. Therefore, in either case where the piston 18 moves from the top dead center toward the bottom dead center, or in the case where the piston 18 moves from the bottom dead center toward the top dead center, the piston 18, specifically, The ribs 50, 51, 52 can be prevented from contacting the inner peripheral surface of the cylinder 16.
また、ピストン18とドライバブレード23とを連結する連結機構、つまり、ボス部58及びピン61は、中心線B1を含むピストン18の側面視で、ピストン18の配置領域内に配置されている。具体的に説明すると、連結機構の一部が、端面52Aから中心線B1方向に突出せずに済む。このため、ピストン18が中心線B1方向に大型化することを抑制できる。また、端面52Aを平坦にすることができ、ピストン18とバンパ25との接触面積を、相対的に広くできる。さらに、ピストン18とドライバブレード23との連結機構の剛性が低下することを抑制できる。
Further, the connecting mechanism for connecting the piston 18 and the driver blade 23, that is, the boss portion 58 and the pin 61 are arranged in the arrangement region of the piston 18 in a side view of the piston 18 including the center line B1. More specifically, a part of the coupling mechanism does not have to protrude from the end face 52A in the direction of the center line B1. For this reason, it can suppress that piston 18 enlarges in the direction of centerline B1. Further, the end surface 52A can be made flat, and the contact area between the piston 18 and the bumper 25 can be made relatively wide. Furthermore, it can suppress that the rigidity of the connection mechanism of the piston 18 and the driver blade 23 falls.
さらに、中心線B1方向で、ピストン18の中心線B1方向の中心と、ピン61の中心線C2との距離が、相対的に短くなっている。これは、ピン61がピストン18の配置領域内に配置されているからである。このため、ドライバブレード23で止具48を打撃した場合の反力、または、回転要素38からドライバブレード23に加わる押し上げ力が、ピン61を経由してピストン18に伝達される場合に、ピン61を中心としてピストン18で発生する回転モーメントの増加を抑制できる。したがって、ピストン18がシリンダ16の中心線B1に対して傾くことを抑制できる。
Further, in the direction of the center line B1, the distance between the center of the piston 18 in the direction of the center line B1 and the center line C2 of the pin 61 is relatively short. This is because the pin 61 is arranged in the arrangement area of the piston 18. For this reason, when the reaction force when hitting the stopper 48 with the driver blade 23 or the pushing force applied to the driver blade 23 from the rotating element 38 is transmitted to the piston 18 via the pin 61, the pin 61 As a result, an increase in rotational moment generated by the piston 18 can be suppressed. Therefore, the piston 18 can be prevented from tilting with respect to the center line B1 of the cylinder 16.
さらにまた、潤滑溝57に潤滑剤が収容されているため、潤滑剤は、スライドリング56とシリンダ16との接触面、及びシール部材55とシリンダ16との接触面に供給される。したがって、シリンダ16、スライドリング56及びシール部材55の摩耗、焼き付きを抑制でき、かつ、シリンダ16、スライドリング56及びシール部材55の耐久性が向上する。
Furthermore, since the lubricant is accommodated in the lubrication groove 57, the lubricant is supplied to the contact surface between the slide ring 56 and the cylinder 16 and the contact surface between the seal member 55 and the cylinder 16. Therefore, wear and seizure of the cylinder 16, the slide ring 56, and the seal member 55 can be suppressed, and durability of the cylinder 16, the slide ring 56, and the seal member 55 is improved.
さらに、中心線B1方向でピストン18の大型化を抑制できるため、スライドリング56の幅を、相対的に広くでき、潤滑溝57の幅を確保できる。したがって、潤滑剤がシール部材55、スライドリング56、シリンダ16を潤滑する性能の低下を抑制できる。また、1本のスライドリング56でピストン18の傾きを抑制するため、ピストン18が、中心線B1方向に大型化することを抑制できる。
Furthermore, since the enlargement of the piston 18 can be suppressed in the direction of the center line B1, the width of the slide ring 56 can be made relatively wide and the width of the lubricating groove 57 can be secured. Accordingly, it is possible to suppress a decrease in performance in which the lubricant lubricates the seal member 55, the slide ring 56, and the cylinder 16. Moreover, since the inclination of the piston 18 is suppressed by the single slide ring 56, the piston 18 can be prevented from being enlarged in the direction of the center line B1.
図4は、打込機10の他の例を示す。図4において、図1~図3と同じ構成は同じ符号を付してある。図4に示すピストン18とドライバブレード23とは、図5(A)のように、ピン61により連結されている。つまり、ピストン18とドライバブレード23との連結機構は、図3に示す連結機構と同じである。
FIG. 4 shows another example of the driving machine 10. 4, the same components as those in FIGS. 1 to 3 are denoted by the same reference numerals. The piston 18 and the driver blade 23 shown in FIG. 4 are connected by a pin 61 as shown in FIG. That is, the coupling mechanism between the piston 18 and the driver blade 23 is the same as the coupling mechanism shown in FIG.
図4に示す打込機10は、シリンダ16内に設けた補助ピストン70を有し、補助ピストン70は、金属製である。補助ピストン70は、中心線B1方向で、ピストン18と空気圧室21との間に配置されており、中心線B1方向に移動可能である。補助ピストン70は、環状のリブ71,72と、リブ71とリブ72との間に設けた取り付け溝73と、を有する。リブ71,72は、中心線B1方向で異なる位置に配置されている。リブ72は、中心線方向でリブ71とピストン18との間に配置されている。
The driving machine 10 shown in FIG. 4 has an auxiliary piston 70 provided in the cylinder 16, and the auxiliary piston 70 is made of metal. The auxiliary piston 70 is disposed between the piston 18 and the air pressure chamber 21 in the direction of the center line B1, and is movable in the direction of the center line B1. The auxiliary piston 70 includes annular ribs 71 and 72 and an attachment groove 73 provided between the rib 71 and the rib 72. The ribs 71 and 72 are arranged at different positions in the direction of the center line B1. The rib 72 is disposed between the rib 71 and the piston 18 in the center line direction.
取り付け溝73にシール部材74が取り付けられている。シール部材74の材質及び形状は、シール部材55と同じである。シール部材74はシリンダ16の内周面に接触してシール面を形成し、空気圧室21の気密性を確保する。シリンダ16内において、ピストン18と補助ピストン70との間に潤滑室75が設けられている。潤滑室75に潤滑剤が収容されている。潤滑室75に収容する潤滑剤は、潤滑溝57に収容する潤滑剤と同じでもよいし、異なっていてもよい。
A seal member 74 is attached to the attachment groove 73. The material and shape of the seal member 74 are the same as those of the seal member 55. The seal member 74 is in contact with the inner peripheral surface of the cylinder 16 to form a seal surface, and ensures the airtightness of the pneumatic chamber 21. In the cylinder 16, a lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70. A lubricant is contained in the lubrication chamber 75. The lubricant stored in the lubrication chamber 75 may be the same as or different from the lubricant stored in the lubrication groove 57.
図1及び図2の打込機10が、図4及び図5(A)に示すピストン18及び補助ピストン70を備えていると、補助ピストン70は、空気圧室21の圧力で、常に、ピストン18に向けて付勢される。また、回転要素38の回転力でドライバブレード23及びピストン18が上昇する行程で、ピストン18の移動力は、潤滑室75を経由して補助ピストン70に伝達される。このため、補助ピストン70は、ピストン18と共に上昇し、空気圧室21の圧力が上昇する。
When the driving machine 10 of FIGS. 1 and 2 includes the piston 18 and the auxiliary piston 70 shown in FIGS. 4 and 5A, the auxiliary piston 70 is always at the piston 18 by the pressure of the pneumatic chamber 21. It is energized towards. Further, the moving force of the piston 18 is transmitted to the auxiliary piston 70 via the lubrication chamber 75 in the stroke in which the driver blade 23 and the piston 18 are lifted by the rotational force of the rotating element 38. For this reason, the auxiliary piston 70 rises together with the piston 18 and the pressure in the pneumatic chamber 21 rises. *
ピストン18が上死点に到達した後、ピニオンピン41がラック42から解放されると、回転要素38の回転力はドライバブレード23に伝達されない。空気圧室21の圧力は、補助ピストン70、潤滑室75を介してピストン18に伝達されているため、ピニオンピン41がラック42から解放されると、補助ピストン70及びピストン18が下降し、ドライバブレード23が止具48を打撃する。
When the pinion pin 41 is released from the rack 42 after the piston 18 reaches the top dead center, the rotational force of the rotating element 38 is not transmitted to the driver blade 23. Since the pressure in the pneumatic chamber 21 is transmitted to the piston 18 via the auxiliary piston 70 and the lubrication chamber 75, when the pinion pin 41 is released from the rack 42, the auxiliary piston 70 and the piston 18 descend, and the driver blade 23 hits the stop 48.
図4の打込機10においては、潤滑室75の潤滑剤が、シール部材55,74とシリンダ16との接触箇所に供給され、接触箇所を潤滑する。したがって、シール部材55,74及びシリンダ16の耐久性が向上する。
In the driving machine 10 of FIG. 4, the lubricant in the lubrication chamber 75 is supplied to the contact portion between the seal members 55 and 74 and the cylinder 16 to lubricate the contact portion. Therefore, the durability of the seal members 55 and 74 and the cylinder 16 is improved.
図5(B)は、補助ピストン70の他の構造例を示す。補助ピストン70は、給油孔77を有する。給油孔77は、補助ピストン70を中心線B1方向に貫通しており、給油孔77の内周面に雌ねじが設けられている。給油孔77は潤滑室75とつながり、給油孔77を塞ぐプラグ78が設けられている。プラグ78の外周面に雄ねじが設けられ、プラグ78を締め付けて補助ピストン70に固定すると、プラグ78は給油孔77を塞ぐ。打込機10の組み立て工程、または、打込機10が分解された状態において、給油孔77から潤滑剤を潤滑室75に供給し、プラグ78で給油孔77を塞ぐことができる。
FIG. 5B shows another structural example of the auxiliary piston 70. The auxiliary piston 70 has an oil supply hole 77. The oil supply hole 77 passes through the auxiliary piston 70 in the direction of the center line B <b> 1, and a female screw is provided on the inner peripheral surface of the oil supply hole 77. The oil supply hole 77 is connected to the lubrication chamber 75, and a plug 78 that closes the oil supply hole 77 is provided. A male screw is provided on the outer peripheral surface of the plug 78, and when the plug 78 is tightened and fixed to the auxiliary piston 70, the plug 78 closes the oil supply hole 77. In the assembly process of the driving machine 10 or in a state where the driving machine 10 is disassembled, the lubricant can be supplied from the oil supply hole 77 to the lubrication chamber 75 and the oil supply hole 77 can be closed by the plug 78.
図5(B)に示す補助ピストン70及びピストン18の構造は、図3、図4及び図5(A)に示す補助ピストン70及びピストン18の構造と同じである。また、図5(B)に示すピストン18とドライバブレード23との連結機構は、図3に示すピストン18とドライバブレード23との連結機構と同じである。
The structures of the auxiliary piston 70 and the piston 18 shown in FIG. 5B are the same as the structures of the auxiliary piston 70 and the piston 18 shown in FIGS. 3, 4, and 5A. The connection mechanism between the piston 18 and the driver blade 23 shown in FIG. 5B is the same as the connection mechanism between the piston 18 and the driver blade 23 shown in FIG.
図5(B)に示すピストン18の作用及び効果は、図3に示すピストン18の作用及び効果と同じである。また、図5(B)に示す補助ピストン70の作用及び効果は、図4及び図5(A)に示す補助ピストン70の作用及び効果と同じである。さらに、図5(B)に示す補助ピストン70では、プラグ78が補助ピストン70に取り付けられていない状態で、給油孔77から潤滑剤を潤滑室75に供給することができる。
The action and effect of the piston 18 shown in FIG. 5B are the same as the action and effect of the piston 18 shown in FIG. Further, the operation and effect of the auxiliary piston 70 shown in FIG. 5B are the same as the operation and effect of the auxiliary piston 70 shown in FIGS. 4 and 5A. Further, in the auxiliary piston 70 shown in FIG. 5B, the lubricant can be supplied from the oil supply hole 77 to the lubrication chamber 75 in a state where the plug 78 is not attached to the auxiliary piston 70.
図6(A)は、ピストン18及び補助ピストン70の他の例を示す。図6(A)に示すピストン18と補助ピストン70とは、接続部80により接続されている。ピストン18、接続部80及び補助ピストン70は、金属材料で一体成形されている。接続部80は、中心線B1を中心として設けられ、接続部80の外径は、ピストン18の外径及び補助ピストン70の外径よりも小さい。
FIG. 6A shows another example of the piston 18 and the auxiliary piston 70. The piston 18 shown in FIG. 6A and the auxiliary piston 70 are connected by a connecting portion 80. The piston 18, the connection portion 80, and the auxiliary piston 70 are integrally formed of a metal material. The connection part 80 is provided centering on the center line B1, and the outer diameter of the connection part 80 is smaller than the outer diameter of the piston 18 and the outer diameter of the auxiliary piston 70.
そして、ピストン18と補助ピストン70との間、つまり、接続部80の周囲に潤滑室75が設けられている。潤滑室75は環状であり、潤滑室75に潤滑剤が収容されている。補助ピストン70に給油孔77が設けられ、補助ピストン70の平面視で、給油孔77の配置領域は、接続部80の配置領域とは異なる。図6は、給油孔77を複数設けた例であり、複数の給油孔77は、プラグ78により、それぞれ塞がれている。
A lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70, that is, around the connection portion 80. The lubrication chamber 75 is annular, and the lubricant is accommodated in the lubrication chamber 75. An oil supply hole 77 is provided in the auxiliary piston 70, and the arrangement region of the oil supply hole 77 is different from the arrangement region of the connecting portion 80 in a plan view of the auxiliary piston 70. FIG. 6 is an example in which a plurality of oil supply holes 77 are provided, and the plurality of oil supply holes 77 are respectively closed by plugs 78.
図6(A)に示すピストン18は、図3に示すピストン18と同じ作用効果を得ることができる。また、図6(A)に示す補助ピストン70は、図5(B)に示す補助ピストン70と同じ作用効果を得ることができる。さらに、図6(A)に示すピストン18と補助ピストン70とは、接続部80で接続されている。したがって、ピストン18と補助ピストン70との同軸度を確保でき、かつ、ピストン18と補助ピストン70とが、中心線B1に対して傾斜することを抑制できる。さらに、ピストン18と補助ピストン70とが、中心線B1方向に同時に移動および停止する。
The piston 18 shown in FIG. 6A can obtain the same effect as the piston 18 shown in FIG. Further, the auxiliary piston 70 shown in FIG. 6 (A) can obtain the same effect as the auxiliary piston 70 shown in FIG. 5 (B). Furthermore, the piston 18 and the auxiliary piston 70 shown in FIG. Therefore, the coaxiality between the piston 18 and the auxiliary piston 70 can be ensured, and the piston 18 and the auxiliary piston 70 can be prevented from being inclined with respect to the center line B1. Further, the piston 18 and the auxiliary piston 70 move and stop simultaneously in the direction of the center line B1.
図6(B)は、補助ピストン70の他の構造例を示す。ピストン18と補助ピストン70とはつながっていない。また、図6(B)に示す補助ピストン70は、ピストン18に最も近い箇所から突出した凸部81を有する。凸部81は、中心線B1を中心として設けられ、かつ、中心線B1方向に突出している。ピストン18と補助ピストン70との間に潤滑室75が設けられている。このため、凸部81がピストン18に接触すると、中心線B1方向におけるピストン18と補助ピストン70との間隔の最低値が定まる。
FIG. 6B shows another structural example of the auxiliary piston 70. The piston 18 and the auxiliary piston 70 are not connected. Further, the auxiliary piston 70 shown in FIG. 6B has a convex portion 81 that protrudes from a location closest to the piston 18. The convex portion 81 is provided around the center line B1 and protrudes in the direction of the center line B1. A lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70. For this reason, when the convex part 81 contacts the piston 18, the minimum value of the interval between the piston 18 and the auxiliary piston 70 in the direction of the center line B1 is determined.
図6(B)に示すピストン18は、図3に示すピストン18と同じ作用効果を得ることができる。また、図6(B)に示す補助ピストン70は、図5(B)に示す補助ピストン70と同じ作用効果を得ることができる。
The piston 18 shown in FIG. 6B can obtain the same effect as the piston 18 shown in FIG. Moreover, the auxiliary piston 70 shown in FIG. 6 (B) can obtain the same effect as the auxiliary piston 70 shown in FIG. 5 (B).
さらに、図6(B)に示す補助ピストン70は凸部81を有する。このため、ピストン18が上昇する行程で、ピストン18の移動力は凸部81を介して補助ピストン70に伝達される。また、補助ピストン70が空気圧室21の圧力で下降する行程で、補助ピストン70の移動力は凸部81を介してピストン18に伝達される。
Further, the auxiliary piston 70 shown in FIG. For this reason, the moving force of the piston 18 is transmitted to the auxiliary piston 70 through the convex portion 81 in the stroke in which the piston 18 moves up. Further, the moving force of the auxiliary piston 70 is transmitted to the piston 18 via the convex portion 81 in the stroke in which the auxiliary piston 70 is lowered by the pressure of the pneumatic chamber 21.
図7(A)は、ピストン18の他の例を示す。ピストン18と補助ピストン70とはつながっていない。図7(A)に示すピストン18は、補助ピストン70に最も近い箇所から突出した凸部82を有する。凸部82は、中心線B1を中心として設けられ、かつ、中心線B1方向に突出している。なお、補助ピストン70は、凸部81を備えていない。ピストン18と補助ピストン70との間に潤滑室75が設けられている。このため、凸部82が補助ピストン70に接触すると、中心線B1方向におけるピストン18と補助ピストン70との間隔の最低値が定まる。
FIG. 7A shows another example of the piston 18. The piston 18 and the auxiliary piston 70 are not connected. The piston 18 shown in FIG. 7A has a protrusion 82 that protrudes from a location closest to the auxiliary piston 70. The convex part 82 is provided centering on the center line B1, and protrudes in the center line B1 direction. Note that the auxiliary piston 70 does not include the convex portion 81. A lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70. For this reason, when the convex part 82 contacts the auxiliary piston 70, the minimum value of the interval between the piston 18 and the auxiliary piston 70 in the direction of the center line B1 is determined.
図7(A)に示すピストン18は、図3に示すピストン18と同じ作用効果を得ることができる。また、図7(A)に示す補助ピストン70は、図5(B)に示す補助ピストン70と同じ作用効果を得ることができる。
The piston 18 shown in FIG. 7A can obtain the same effect as the piston 18 shown in FIG. Further, the auxiliary piston 70 shown in FIG. 7A can obtain the same effects as the auxiliary piston 70 shown in FIG.
さらに、図7(A)に示すピストン18は凸部82を有する。このため、ピストン18が上昇する行程で、ピストン18の移動力は凸部82を介して補助ピストン70に伝達される。また、補助ピストン70が空気圧室21の圧力で下降する行程で、補助ピストン70の移動力は凸部82を介してピストン18に伝達される。
Furthermore, the piston 18 shown in FIG. For this reason, the moving force of the piston 18 is transmitted to the auxiliary piston 70 through the convex portion 82 in the stroke in which the piston 18 moves up. Further, the moving force of the auxiliary piston 70 is transmitted to the piston 18 through the convex portion 82 in the stroke in which the auxiliary piston 70 is lowered by the pressure of the pneumatic chamber 21.
図7(B)は、ピストン18及び補助ピストン70の組み合わせ例を示す。ピストン18は、図7(A)のピストン18と同様に凸部82を有する。補助ピストン70は、図6(B)の補助ピストン70と同様に凸部81を有する。また、ピストン18と補助ピストン70との間に潤滑室75が設けられている。
FIG. 7B shows a combination example of the piston 18 and the auxiliary piston 70. The piston 18 has the convex part 82 similarly to the piston 18 of FIG. The auxiliary piston 70 has the convex part 81 similarly to the auxiliary piston 70 of FIG. A lubrication chamber 75 is provided between the piston 18 and the auxiliary piston 70.
図7(B)に示すピストン18及び補助ピストン70は、凸部81と凸部82とが接触して、中心線B1方向におけるピストン18と補助ピストン70との間隔の最低値が定まる。図7(B)のピストン18の作用効果は、図3及び図7のピストン18の作用効果と同じである。図7(B)の補助ピストン70の作用効果は、図5及び図6(B)のピストン18の作用効果と同じである。
In the piston 18 and the auxiliary piston 70 shown in FIG. 7B, the convex portion 81 and the convex portion 82 come into contact with each other, and the minimum value of the distance between the piston 18 and the auxiliary piston 70 in the center line B1 direction is determined. The effect of the piston 18 in FIG. 7B is the same as the effect of the piston 18 in FIGS. 3 and 7. The effect of the auxiliary piston 70 in FIG. 7B is the same as the effect of the piston 18 in FIGS. 5 and 6B.
ここで、本実施形態で説明した構成と、本発明の構成との対応関係を説明すると、ドライバブレード23が、本発明の打撃子であり、ピストン18が、本発明のピストンであり、シリンダ16が、本発明のシリンダに相当し、空気圧室21が、本発明の圧力室に相当し、シール部材55が、本発明の第1シール部材に相当し、スライドリング56が、本発明のリング部材に相当し、潤滑溝57が、本発明の第1保持部に相当し、ボス部58及びピン61が、本発明の連結機構に相当し、連結孔60が、本発明の連結孔に相当し、開口部60Aは、本発明の開口部に相当し、補助ピストン70が、本発明の補助ピストンに相当し、潤滑室75が、本発明の第2保持部に相当し、シール部材74が、本発明の第2シール部材に相当し、給油孔77が、本発明の供給孔に相当し、プラグ78が、本発明のプラグに相当し、接続部80が、本発明の接続部に相当し、凸部81が、本発明の第1凸部に相当し、凸部82が、本発明の第2凸部に相当し、ボス部58が、本発明の結合部に相当する。
Here, the correspondence between the configuration described in the present embodiment and the configuration of the present invention will be described. The driver blade 23 is the striker of the present invention, the piston 18 is the piston of the present invention, and the cylinder 16. Corresponds to the cylinder of the present invention, the pneumatic chamber 21 corresponds to the pressure chamber of the present invention, the seal member 55 corresponds to the first seal member of the present invention, and the slide ring 56 corresponds to the ring member of the present invention. The lubricating groove 57 corresponds to the first holding portion of the present invention, the boss portion 58 and the pin 61 correspond to the connecting mechanism of the present invention, and the connecting hole 60 corresponds to the connecting hole of the present invention. The opening 60A corresponds to the opening of the present invention, the auxiliary piston 70 corresponds to the auxiliary piston of the present invention, the lubrication chamber 75 corresponds to the second holding portion of the present invention, and the seal member 74, It corresponds to the second seal member of the present invention and the oil supply hole 77. The plug 78 corresponds to the plug of the present invention, the connecting portion 80 corresponds to the connecting portion of the present invention, and the convex portion 81 corresponds to the first convex portion of the present invention. And the convex part 82 is equivalent to the 2nd convex part of this invention, and the boss | hub part 58 is equivalent to the coupling | bond part of this invention.
本発明の打込機は、上記実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。例えば、コンプレッサで生成した圧縮空気を、エアホースを経由させて空気圧室に供給する打込機を含む。さらに、実施形態で説明した電動モータは、直流電源としての電池を動力源とする直流モータと、交流電源を使用する交流モータと、を含む。さらに、モータは、電動モータに替えて、油圧モータ、空気圧モータ、内燃機関の何れかを用いてもよい。
The driving machine of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist thereof. For example, it includes a driving machine that supplies compressed air generated by a compressor to an air pressure chamber via an air hose. Furthermore, the electric motor described in the embodiment includes a DC motor using a battery as a DC power source as a power source and an AC motor using an AC power source. Further, the motor may be any one of a hydraulic motor, a pneumatic motor, and an internal combustion engine instead of the electric motor.
ピストンに設ける連結孔は、ピストンを径方向に貫通している構造と、ピストンを径方向に貫通しない構造と、を含む。連結孔がピストンを径方向に貫通しない構造では、連結孔の開口部は、ピストンの外周面に1箇所配置される。そして、第1保持溝は、ピストンの円周方向で、開口部の配置箇所とは異なる箇所に配置される。ドライバブレードに設けた結合部は、ピストンとドライバブレードとを連結する部位である。
The connection hole provided in the piston includes a structure that penetrates the piston in the radial direction and a structure that does not penetrate the piston in the radial direction. In the structure in which the connecting hole does not penetrate the piston in the radial direction, the opening of the connecting hole is arranged at one place on the outer peripheral surface of the piston. And a 1st holding groove is arrange | positioned in the circumferential direction of a piston in the location different from the arrangement location of an opening part. The coupling portion provided on the driver blade is a portion that connects the piston and the driver blade.
10…打込機、16…シリンダ、18…ピストン、21…空気圧室、23…ドライバブレード、55,74…シール部材、56…スライドリング、57…潤滑溝、58…ボス部、60…連結孔、60A…開口部、61…ピン、70…補助ピストン、75…潤滑室、77…給油孔、78…プラグ、80…接続部、81,82…凸部。
DESCRIPTION OF SYMBOLS 10 ... Driving machine, 16 ... Cylinder, 18 ... Piston, 21 ... Pneumatic chamber, 23 ... Driver blade, 55, 74 ... Seal member, 56 ... Slide ring, 57 ... Lubrication groove, 58 ... Boss part, 60 ... Connection hole , 60A ... opening, 61 ... pin, 70 ... auxiliary piston, 75 ... lubrication chamber, 77 ... oil supply hole, 78 ... plug, 80 ... connection part, 81, 82 ... convex part.
Claims (13)
- 打撃子を取り付けたピストンと、前記ピストンが往復動作可能に収容されたシリンダと、前記シリンダの内部につながり、かつ、前記ピストンを打撃する圧力室と、を有する打込機であって、前記ピストンの外周面に設けられ、かつ、前記シリンダに接触する第1シール部材と、前記ピストンの外周面に設けられ、かつ、前記シリンダの内部における前記ピストンの往復動作をガイドするスライドリングと、を有する、打込機。 A driving machine comprising: a piston to which a striker is attached; a cylinder in which the piston is accommodated so as to be reciprocally movable; and a pressure chamber connected to the inside of the cylinder and hitting the piston. A first seal member that contacts the cylinder, and a slide ring that is provided on the outer peripheral surface of the piston and guides the reciprocating motion of the piston inside the cylinder. , Driving machine.
- 前記第1シール部材は、前記シリンダの中心線方向で前記スライドリングと前記圧力室との間に配置されている、請求項1記載の打込機。 The driving device according to claim 1, wherein the first seal member is disposed between the slide ring and the pressure chamber in a direction of a center line of the cylinder.
- 前記ピストンは、前記中心線に対して交差する平面視で前記スライドリングの内側に設けられ、かつ、潤滑剤を収容する第1保持部を有する、請求項2記載の打込機。 3. The driving machine according to claim 2, wherein the piston is provided inside the slide ring in a plan view that intersects the center line, and has a first holding portion that contains a lubricant. 4.
- 前記ピストンと前記打撃子とを連結する連結機構が設けられ、前記連結機構は、前記中心線を含む側面視で、前記ピストンの配置領域に配置されている、請求項3記載の打込機。 The driving machine according to claim 3, wherein a connecting mechanism that connects the piston and the striker is provided, and the connecting mechanism is disposed in an arrangement region of the piston in a side view including the center line.
- 前記連結機構は、前記打撃子に設けた結合部と、前記結合部と前記ピストンとを連結するピンと、を有する、請求項4記載の打込機。 5. The driving machine according to claim 4, wherein the coupling mechanism includes a coupling portion provided on the striker, and a pin coupling the coupling portion and the piston.
- 前記連結機構は、前記中心線に対して交差する平面視で前記第1保持部の内側に配置されている、請求項4または5記載の打込機。 6. The driving machine according to claim 4, wherein the coupling mechanism is disposed inside the first holding part in a plan view intersecting with the center line.
- 前記ピストンの径方向に沿って配置され、かつ、前記ピンが配置される連結孔が設けられ、前記連結孔は、前記ピストンの外周面の少なくとも1箇所に配置された開口部を有し、前記第1保持部は、前記ピストンの円周方向で前記開口部が配置された箇所とは異なる箇所に配置されている、請求項5記載の打込機。 A connecting hole is provided along the radial direction of the piston, and the pin is arranged, and the connecting hole has an opening arranged in at least one place on the outer peripheral surface of the piston, The driving device according to claim 5, wherein the first holding portion is arranged at a location different from a location where the opening is arranged in a circumferential direction of the piston.
- 前記シリンダ内に前記中心線方向で前記ピストンと前記圧力室との間に配置され、かつ、前記ピストンとの間で前記中心線の動力伝達を行う補助ピストンと、前記シリンダ内で前記ピストンと前記補助ピストンとの間に設けられ、かつ、潤滑剤を収容する第2保持部と、を有する、請求項2~7のいずれか1項記載の打込機。 An auxiliary piston that is disposed between the piston and the pressure chamber in the direction of the center line in the cylinder and that transmits power of the center line to and from the piston; The driving machine according to any one of claims 2 to 7, further comprising a second holding portion that is provided between the auxiliary piston and that contains a lubricant.
- 前記補助ピストンの外周面に設けられ、かつ、前記シリンダに接触する第2シール部材を備えている、請求項8記載の打込機。 The driving machine according to claim 8, further comprising a second seal member provided on an outer peripheral surface of the auxiliary piston and in contact with the cylinder.
- 前記補助ピストンを前記中心線方向に貫通し、かつ、前記第2保持部につながる供給孔と、前記供給孔を塞ぐプラグと、を備えている、請求項8または9記載の打込機。 10. The driving machine according to claim 8, further comprising a supply hole that penetrates the auxiliary piston in the center line direction and is connected to the second holding portion, and a plug that closes the supply hole.
- 前記ピストンと前記補助ピストンとを接続する接続部が設けられている、請求項8~10のいずれか1項記載の打込機。 The driving machine according to any one of claims 8 to 10, wherein a connecting portion for connecting the piston and the auxiliary piston is provided.
- 前記補助ピストンは、前記ピストンに接触する第1凸部を有する、請求項8~11のいずれか1項記載の打込機。 The driving machine according to any one of claims 8 to 11, wherein the auxiliary piston has a first convex portion that contacts the piston.
- 前記ピストンは、前記補助ピストンに接触する第2凸部を有する、請求項8~12のいずれか1項記載の打込機。 The driving machine according to any one of claims 8 to 12, wherein the piston has a second convex portion that contacts the auxiliary piston.
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WO2022075448A1 (en) * | 2020-10-09 | 2022-04-14 | 工機ホールディングス株式会社 | Work machine |
DE102021125536A1 (en) | 2021-10-01 | 2023-04-06 | Umicore Ag & Co. Kg | Catalytically active particle filter with high filtration efficiency |
WO2024004878A1 (en) * | 2022-06-29 | 2024-01-04 | 工機ホールディングス株式会社 | Work machine |
US12048992B2 (en) | 2022-12-27 | 2024-07-30 | Milwaukee Electric Tool Corporation | Lifter mechanism for a powered fastener driver |
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