WO2020175008A1

WO2020175008A1 - Driving machine

Info

Publication number: WO2020175008A1
Application number: PCT/JP2020/003664
Authority: WO
Inventors: 駒崎　義一; 石沢　禎紀
Original assignee: 工機ホールディングス株式会社
Priority date: 2019-02-27
Filing date: 2020-01-31
Publication date: 2020-09-03
Also published as: JP7205612B2; TW202031436A; JPWO2020175008A1

Abstract

Provided is a driving machine that can suppress operation energy loss of a striking part in a stroke where the striking part operates in a first direction. A driving machine (10) has: a trigger (14); a striking part (13) that can operate in the first direction and a second direction; a piston upper chamber (32) to which gas is supplied upon application of operation force to the trigger (14) and that operates the striking part (13) in the first direction with the pressure of the gas; a piston lower chamber (35) that operates the striking part (13) in the second direction with the pressure of the gas; and a housing (11) that has the piston lower chamber (35) formed therein. The driving machine is provided with a sleeve (39) that discharges, to the outside of the housing (11), the gas in the piston lower chamber (35) in a stroke where the striking part (13) operates in the first direction and a sleeve (39) that, when the operation force with respect to the trigger (14) is canceled after the striking part (13) operates in the first direction, operates the striking part (13) in the second direction with the pressure of the piston lower chamber (35) by suppling the gas from the piston upper chamber (32) to the piston lower chamber (35).

Description

\¥0 2020/175008 1 liter

Name of invention: Driving machine

Technical field

The present invention relates to a driving machine having a housing to which a gas is supplied, and a striking portion that operates by the pressure of the gas supplied into the housing.

Background technology

[0002]Patent Document 1 describes an example of a driving machine having a gas chamber to which compressed gas is supplied, and a striking part that operates at the pressure of the compressed gas supplied to the gas chamber. The driving tool described in Patent Document 1 includes a housing, a handle, a cylinder, a head valve chamber, a cylinder upper chamber as a first gas chamber, a piston lower chamber as a second gas chamber, a pressure accumulating chamber, a striking part, It has a trigger, push lever, trigger valve, return chamber, passage, injection part, magazine, bumper and stopper.

[0003] The cylinder is movably arranged in the housing. Bumpers are located inside the housing. The striking part has a piston and a driver blade. The piston is movable in the cylinder. The cylinder upper chamber is formed in the cylinder between the piston head valve and the cylinder head chamber. The biston lower chamber is formed in the cylinder between the piston and the bumper. The return chamber is formed inside the housing and outside the cylinder. The passage is provided in the cylinder. The passage connects the cylinder lower chamber and the return chamber. The stopper is provided inside the housing. Compressed gas is supplied to the accumulator from the outside of the housing. Compressed gas is filled in the piston lower chamber and the return chamber in the housing. The magazine accommodates the stopper, and the stopper is supplied to the ejection unit.

[0004] When the user releases the operation force for at least one of the trigger and the push lever, the trigger valve supplies the compressed gas in the pressure accumulating chamber to the head valve chamber. The head valve is pressed against the cylinder, and the head valve shuts off the accumulator chamber and the piston upper chamber, and connects the piston upper chamber and the outside of the housing. The piston is biased by the air pressure in the lower chamber of the cylinder, 〇 2020/175008 2 卩 (：171? 2020 /003664

Has contacted the stopper and stopped at the top dead center.

[0005] When the user applies an operation force to the trigger and the push lever, the trigger valve discharges the compressed gas in the head valve chamber to the outside of the housing. The head valve separates from the cylinder by the air pressure in the pressure accumulating chamber, and the head valve connects the pressure accumulating chamber and the piston upper chamber and disconnects the piston upper chamber from the outside of the housing. Compressed gas in the accumulator is supplied to the piston upper chamber, the striking part operates toward bottom dead center, and the driver blade strikes the fastener in the injection path. When the piston operates toward the bottom dead center, the compressed gas in the piston lower chamber and the return chamber is compressed and the pressure rises.

[0006] After the driver blade hits the fastener, the piston collides with the bumper and the hitting portion stops at the bottom dead center. When the user releases the operation force from at least one of the trigger and the push lever, the trigger valve supplies the compressed gas in the pressure accumulating chamber to the head valve chamber. The head valve shuts off the accumulator chamber and the piston upper chamber and connects the piston upper chamber and the outside of the housing. The striking part is urged by the air pressure in the lower chamber of the cylinder and rises from the bottom dead center. When the piston contacts the stopper, the striking part stops at the top dead center.

Prior art documents

Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2 0 1 3 _ 4 3 2 3 4

Summary of the invention

Problems to be Solved by the Invention

[0008] The inventor of the present application recognizes the problem that, when the striking part is operated in the direction of striking the fastener, the pressure of the second gas chamber serves as the working resistance of the striking part, resulting in loss of the working energy of the striking part. did.

[0009] An object of the present invention is to provide a driving machine capable of suppressing the loss of operating energy of the striking part in the process in which the striking part operates in the direction of striking the fastener. Means for solving the problem 〇 2020/175008 3 boxes (：171? 2020/003664

[0010] In the driving tool according to the embodiment, a user applies and releases an operating force to the operating member, and a first direction for striking the fastener and a second direction opposite to the first direction. A striking part that is operable, a gas is supplied when an operating force is applied to the operating member, and a first gas chamber that actuates the striking part in the first direction by gas pressure, and a gas pressure And a housing in which the second gas chamber is formed, wherein the striking part is operated in the second direction, and the striking part is in the first direction. An exhaust mechanism that discharges the gas in the second gas chamber to the outside of the housing in the process of operating in the same manner, and the operating force on the operating member is released after the striking portion has operated in the first direction. A return mechanism that operates the striking part in the second direction by the pressure of the second gas chamber by supplying gas from the first gas chamber to the second gas chamber.

Effect of the invention

[001 1] The driving machine of the embodiment can suppress the loss of the operating energy of the striking part in the process in which the striking part operates in the direction of striking the fastener.

Brief description of the drawings

[FIG. 1] FIG. 1 is a partial cross-sectional view showing a first embodiment of a driving tool according to the present invention, in which a striking portion is stopped at a standby position.

[Fig. 2] Fig. 2 is a partial cross-sectional view of a cylinder and an injection unit, which is Embodiment 1 of a driving machine. [Fig. 3] Fig. 3 is a partial cross-sectional view of the driving device according to the first embodiment, in which the striking part is operated from the standby position.

[Fig. 4] Fig. 4 is a partial cross-sectional view of a cylinder and an injection part, which corresponds to the driving machine of Fig. 3.

〇

[Fig. 5] Fig. 5 is a partial cross-sectional view showing the first embodiment of the driving tool, in which the striking portion has completed striking of the fastener.

[Fig. 6] Fig. 6 is a partial cross-sectional view of the first embodiment of the driving tool, in a state where compressed air is exhausted from the cylinder upper chamber.

[Fig. 7] Fig. 7 is a partial cross-sectional view of Embodiment 1 of the driving machine, in a state where compressed air in the cylinder upper chamber flows into the cylinder lower chamber. \\0 2020/175 008 4 卩 (: 17 2020 /003664

[Fig. 8] Fig. 8 is a sectional view of a part of the driving machine according to the second embodiment in a state where the striking part is stopped at the standby position.

FIG. 9 is a partial cross-sectional view of the cylinder and the injection part corresponding to the state of the driving tool of FIG.

[Fig. 10] Fig. 10 is a sectional view of a part of the driving machine according to the second embodiment in a state where the striking part is operated from the standby position.

[Fig. 11] Fig. 11 is a partial cross-sectional view of a cylinder and an injection portion corresponding to the state of the driving machine in Fig. 10.

[Fig. 12] Fig. 12 is a sectional view of a portion of the driving machine according to the second embodiment in a state in which the striking portion has completed striking the fastener.

[Fig. 13] Fig. 13 is a partial cross-sectional view showing a second embodiment of the driving tool and showing a state in which compressed air is exhausted from the cylinder upper chamber.

[Fig. 14] Fig. 14 is a partial cross-sectional view showing Embodiment 2 of the driving machine, in which compressed air in the cylinder upper chamber flows into the cylinder lower chamber.

[FIG. 15] A diagram of an example of comparing an embodiment of a driving machine and a comparative example of the driving machine.

[0013] Next, of several embodiments included in the driving tool of the present invention, a typical driving tool will be described with reference to the drawings.

[0014] (Embodiment 1) Embodiment 1 of the driving tool will be described with reference to Figs. 1 to 7. The driving machine 10 has a housing 11, a cylinder 12, a striking part 13 and a trigger 14 and an ejecting part 15 and a push lever 16. Also, a magazine 17 that can be attached to the driving machine 10 is provided. The housing 11 has a tubular body portion 18, a head cover 19 fixed to the body portion 18, and a handle 20 connected to the body portion 18.

[0015] A pressure accumulating chamber 21 is formed inside the handle 20, the inside of the body 18 and the inside of the head cover 19. Air hose connected to handle 20. Compressed air as compressed gas is supplied to the accumulator chamber 2 1 through the air hose. 〇 2020/175008 5

It The cylinder 12 is provided inside the body 18 and the head cover 19 as an example. The cylinder 12 is provided so as not to move in the direction along the center line 81.

[0016] The stopper 22 is attached to the head cover 19. The stopper 22 is made of synthetic rubber as an example. The exhaust passage 23 is formed between the stopper 22 and the head cover 19. The exhaust passage 23 is connected to the outer wall 1 of the housing 11. The head valve 24 is provided in the head cover 19. The head valve 24 is made of synthetic rubber, and the head valve 24 is movable in the direction along the center line 1 of the cylinder 12 2. The head valve 24 has an annular shape, and the head valve 24 has a seal lip 25 and a sleeve 26. The seal lip 25 is formed on the outer peripheral surface of the head valve 24. A head valve chamber 27 is formed between the head valve 24 and the head cover 19, and a seal lip 25 hermetically seals the head valve chamber 27. The head valve 24 is urged by the pressure in the pressure accumulating chamber 21 in a direction away from the cylinder 12.

A biasing member 28 is provided between the stopper 22 and the head valve 24. The biasing member 28 is, for example, a metal compression spring. The biasing member 28 biases the head valve 24 close to the cylinder 12 in the direction along the center line 81.

The striking part 13 has a piston 29 and a driver blade 30 fixed to the piston 29. The piston 29 is arranged in the cylinder 12. The striking part 13 can be actuated along the center line 8 1 in the first and second orientations 1 and 2, that is, it can be translated. The second orientation sill 2 is the opposite of the first orientation sill 1. The first heading 1 can be defined as a descent in Figure 1. The second heading 2 can be defined as rising in Figure 1. A seal member 31 is attached to the outer peripheral surface of the piston 29.

A piston upper chamber 32 is formed in the cylinder 12 between the head valve 24 and the piston 29. The head valve 24 is acted upon by the force of the biasing member 28 as shown 〇 2020/175008 6 boxes (：171? 2020/003664

The head valve 24 is pressed against the end of the cylinder 12 so that the piston upper chamber 32 and the accumulator chamber 21 are shut off from each other. Further, the sleeve 26 connects the upper chamber 32 of the piston and the exhaust passage 23.

[0020] When the head valve 24 is separated from the end of the cylinder 12 as shown in Fig. 3, the head valve 24 connects the piston upper chamber 3 2 and the pressure accumulating chamber 21. Also, a sleeve 26 connects the piston upper chamber 32 and the exhaust passage 23.

As shown in FIG. 2, the injection part 15 is fixed to the body part 18. The injection part 15 is in contact with the end of the cylinder 12 in the direction along the center line 1. An annular bumper 33 is provided inside the cylinder 12. A part of the bumper 33 is in contact with the projecting portion 15. The bumper 33 is made of synthetic rubber or silicon rubber. The bumper 33 has a shaft hole 34, and the driver blade 30 is movable in the shaft hole 34 in a direction along the center line 8 1. Inside the cylinder 12, a lower piston chamber 35 is formed between the piston 29 and the bumper 33. The seal member 3 1 hermetically separates the lower Viston chamber 35 and the upper Viston chamber 3 2.

A partition wall 36 is provided inside the body portion 18. The partition 36 is annular. The partition wall 36 is arranged so as to surround the outer circumference of the cylinder 12. Passages 3 7 and 3 8 are provided to pass through the cylinder 12 in the radial direction. The passages 37 and 38 are arranged between the partition wall 36 and the injection portion 15 in the direction along the center line 81. A plurality of passages 37 and 38 are provided at intervals in the circumferential direction of the cylinder 12 respectively.

The passage 37 is arranged between the partition wall 36 and the injection portion 15 in the direction along the center line 1. The passage 38 is arranged along the center line 1 between the passage 37 and the injection portion 15. A sleeve 39 is provided in the body 18. The sleeve 39 is arranged between the body portion 18 and the cylinder 12, and the sleeve 39 is arranged concentrically with the cylinder 12. The sleeve 39 is movable in the direction along the center line 1 with respect to the body 18 and the cylinder 12.

A passage 40 is formed between the sleeve 39 and the cylinder 12. Passage 4 〇 2020/175008 7 卩(: 171-1?2020/003664

0 is formed annularly outside the cylinder 12 in the radial direction of the cylinder 12. Sealing members 41 and 42 are provided between the sleeve 39 and the cylinder 12, and the sealing members 41 and 42 hermetically seal the passage 40. A biasing member 43 is provided in the passage 40. The biasing member 43 is, for example, a compression spring made of metal. The urging member 43 urges the sleeve 39 in a direction along the center line 81 so as to bring the sleeve 39 closer to the injection portion 15.

A control chamber 44 and a control chamber 45 are formed inside the body portion 18. The control chamber 44 is formed between the body 18 and the cylinder 12. A partition wall 36 separates the control room 4 4 and the pressure storage room 21. Compressed air is supplied to the control room 44. When compressed air is supplied to the control chamber 44, the sleeve 39 is urged in the direction along the center line 1 toward the ejection portion 15.

As shown in FIG. 4, the control chamber 45 is formed between the body 18 and the cylinder 12. The control room 45 is arranged between the injection part 15 and the sleeve 39 in the direction along the center line 81. A passage 46 is provided in the body portion 18, and the passage 46 is always connected to the pressure accumulation chamber 21 and the control chamber 45. A part of the compressed air supplied to the pressure accumulating chamber 21 via the air hose flows into the control chamber 45 through the passage 46. The sleeve 39 is urged by the pressure of the control chamber 45 in a direction away from the injection unit 15.

A passage 47 is provided so as to penetrate the sleeve 39 in the radial direction. A plurality of passages 47 are provided at intervals in the circumferential direction of the sleeve 39. An exhaust chamber 48 is provided between the body 18 and the sleeve 39. An exhaust passage 80 is provided through the body portion 18. The exhaust passage 80 constantly connects the exhaust chamber 48 and the outer wall 1. A plurality of exhaust passages 80 are provided at intervals along the entire circumference of the body portion 18. When the sleeve 39 is actuated in the direction along the center line 81, the Viston lower chamber 35 is connected to either the passage 40 or the outer wall 1.

[0028] A valve 4 9 is attached to the outer peripheral surface of the cylinder 12. The valve 49 is a ring made of synthetic rubber and is elastically deformable in the radial direction of the cylinder 12. When valve 4 9 opens with the air pressure in passage 37, the air in cylinder 12 passes through passage 37. \\ 2020/175008 8 (: 17 2020/003664 Flows into passage 40. When valve 4 9 closes, valve 4 9 blocks air in passage 40 from flowing into cylinder 12 2. Valve 4 9 can be defined as a check valve

[0029] As shown in FIG. 2, the trigger 14 is attached to the housing 11. The trigger 14 is rotatable about the support shaft 50 with respect to the housing 11 within a predetermined angle range. Arm 5 1 is attached to trigger 1 4. The arm 5 1 can operate with respect to the trigger 1 4 about the support shaft 5 2.

[0030] As shown in Fig. 1, a trigger valve 53 is provided at a connection portion between the body portion 18 and the handle 20. The trigger valve 53 has a plunger 54, a body 55, a valve body 56 and a biasing member 57. Both the body 55 and the valve body 56 have a cylindrical shape, and both the body 55 and the valve body 56 are arranged concentrically around the center line 2. The valve body 5 6 is arranged in the body 55, and the valve body 5 6 can be actuated in the direction along the center line 2 with respect to the body 55.

[0031] The plunger 54 is arranged in the valve body 56. The body 55 has a passage 58. A passage 59 is provided in the housing 1 1. The passage 58 is connected to the head valve chamber 27 through the passage 59. Further, the passage 58 is connected to the control room 4 4. Further, an exhaust passage 60 is provided between the body 55 and the valve body 56. The exhaust path 60 is connected to the outer wall 1. The biasing member 57 is, for example, a compression spring, and the biasing member 57 biases the plunger 5 4 toward the arm 5 1 in the direction of the center line 82.

The injection part 15 has a tubular part 61 and a flange 81 connected to the outer peripheral surface of the tubular part 61. The flange 81 is fixed to the body 18 by a fixing element. The tubular portion 61 has an injection passage 62. The center line 1 is located in the injection path 62, and the driver blade 30 is movable in the direction along the center line 1 in the injection path 62. The inner surface of the cylindrical portion 61 comes into contact with the outer peripheral surface of the driver blade 30 to prevent the air in the piston lower chamber 35 from leaking to the injection passage 62.

The magazine 17 is fixed to the ejection unit 15. Magazine 17 contains nails 6 3. Magazine 1 7 has feeder 6 4 and feeder 6 4 has magazine 1 〇 2020/175008 9 boxes (：171? 2020/003664

Send the nail 6 3 in 7 to the injection path 6 2.

The push lever 16 is operable in a predetermined range in the direction along the center line 8 1 with respect to the ejection portion 15. A shaft member 65 is connected to the push lever 16 in a power-transmittable manner. The operating force of the push lever 16 is transmitted to the shaft member 65. The shaft member 65 is biased by the biasing member 66 in a direction away from the arm 51. The biasing member 66 is, for example, a compression spring.

[0035] Next, an example in which the nail 6 3 is driven into the mating member 67 using the driving machine 10 will be described.

When at least one of the release of the operating force for the trigger 14 or the push lever 16 being separated from the mating material 67, the trigger valve 5 3 of the driving tool 10 The head valves 24 are in their respective initial states. The striking part 13 is stopped at the standby position.

In the trigger valve 5 3, the valve body 5 6 connects the pressure accumulating chamber 21 and the passage 58, and shuts off the passage 5 8 and the exhaust passage 60. Compressed air from the accumulator chamber 21 is supplied to the head valve chamber 27. The head valve 24 is pressed against the end of the cylinder 12 by the urging force of the urging member 28 and the pressure of the head valve chamber 27. The head valve 24 shuts off the upper piston chamber 3 2 and the accumulator chamber 21. Further, the head valve 24 connects the piston upper chamber 32 and the outer wall 1. The pressure in the piston upper chamber 32 is atmospheric pressure, and the piston 29 is urged by the pressure in the piston lower chamber 35 to come into contact with the head valve 24. Therefore, the striking part 13 stops at the standby position, that is, at the top dead center.

A part of the compressed air in the pressure accumulating chamber 21 is supplied to the control chamber 4 4 through the passage 58. A part of the compressed air in the pressure accumulating chamber 21 is supplied to the control chamber 45 through the passage 46. As shown in FIG. 2, the sleeve 39 receives the biasing force of the biasing member 43, the pressure of the control chamber 44, and the pressure of the control chamber 45. The sleeve 39 is pressed against the flange 81 by the urging force corresponding to the difference between the pressure receiving area in the control chamber 44 and the pressure receiving area in the control chamber 45, and the urging force of the urging member 43, and is pressed against the flange 81. 9 is stopped in the standby position. When the sleeve 39 is in the standby position, the sleeve 39 connects the lower piston chamber 35 and the passage 40 via the passage 38, and 〇 2020/175008 10 (:171? 2020/003664), shut off the piston lower chamber 35 and the outer wall 1.

[0038] Next, when the user applies an operating force to the trigger 14 and presses the push lever 16 onto the hand material 7 7, the operating force of the trigger 14 and the push lever 16 is changed to the plunger 5 4 Be transmitted to. The plunger 5 4 operates by piled up by the biasing force of the biasing member 5 7, and the trigger valve 5 3 switches from the initial state to the operating state. When the ligature valve 5 3 is activated, the valve body 5 6 disconnects the accumulator chamber 21 and the passage 58, and the valve body 5 6 connects the passage 5 8 and the exhaust passage 60.

Therefore, the compressed air in the head valve chamber 27 is exhausted to the outer wall 1 through the passage 59 and the exhaust passage 60. The head valve 24 is operated against the biasing force of the biasing member 28 by the pressure of the pressure accumulating chamber 21. Therefore, the head valve 24 connects the piston upper chamber 3 2 and the pressure accumulating chamber 21 as shown in FIG. 3, and shuts off the piston upper chamber 3 2 and the exhaust passage 23.

[0040] Then, the pressure of the piston upper chamber 32 rises, and the striking portion 13 operates along the center line 8 1 from the top dead center to the bottom dead center. The driver blade 30 hits the nail 63 in the injection path 62 as shown in FIG.

Further, when the trigger valve 53 is activated, the compressed air in the control chamber 44 is discharged to the outer wall 1 through the passage 58 and the exhaust passage 60. Then, the sleeve 39 is operated by the pressure of the control chamber 45 so as to be separated from the ejection portion 15 against the urging force of the urging member 43. The sleeve 39 stops at the exhaust position shown in Figure 4. When the sleeve 39 is in the exhaust position, it closes the piston lower chamber 35 and the passage 40, and connects the piston lower chamber 35 and the outer wall 1 to the passage 38,

Connect via 4 7. Further, the inner surface of the sleeve 39 is pressed against the valve 49, and the valve 49 is prevented from elastically deforming outward in the radial direction. That is, the sleeve 39 holds the valve 49 closed the passage 37.

[0042] Therefore, the striking portion 13 operates from the top dead center toward the bottom dead center, and the piston lower chamber 3

When the pressure in 5 rises, the air in the piston lower chamber 35 is discharged to the outer wall 1 through the passage 38, the exhaust chamber 48 and the exhaust passage 80. The sleeve 39 keeps the valve 4 9 closed in the passage 37, so that the air in the lower chamber 35 of the piston is in the passage 3 7. 〇 2020/175008 1 1 卩(: 171-1? 2020/003664

It does not flow through passage 7 into passage 40.

Then, as shown in FIG. 5, after the driver blade 30 completes the operation of driving the nail 63 into the mating member 67, the viston 29 collides with the bumper 33. The bumper 33 absorbs part of the kinetic energy of the striking part 13 and the striking part 13 stops at the bottom dead center. When the striking part 13 reaches the bottom dead center and the trigger valve 5 3 is kept in the operating state, the control room 4 4 is connected to the outer wall 1 of the housing 1 1 through the passage 5 8. .. Therefore, the sleeve 39 is stopped at the exhaust position as shown in Fig. 5.

[0044] After the striking part 13 reaches the bottom dead center, the user releases the operation force for the trigger 14 or separates the push lever 16 from the mating member 67, at least one of Then, the trigger valve 53 switches from the operating state to the initial state. Then, the compressed air in the pressure accumulating chamber 21 is supplied to the head valve chamber 27 through the passage 59. As shown in Fig. 6, the head valve 24 is pressed against the end of the cylinder 12 to shut off the piston upper chamber 3 2 from the pressure accumulating chamber 21 and to connect the piston upper chamber 3 2 and the exhaust passage 2 3 to each other. Connect.

[0045] Further, when the trigger valve 5 3 is switched from the operating state to the initial state, the pressure accumulating chamber 2

One compressed air is supplied to the control room 4 4 through the passage 58. Then, the sleeve 39 is operated toward the injection portion 15 by the pressure of the control chamber 44 and the biasing force of the biasing member 43, and the sleeve 39 is stopped at the standby position.

[0046] When the sleeve 39 stops at the standby position, the sleeve 39 is separated from the outer peripheral surface of the valve 49 as shown in Figs. 6 and 7. Therefore, the valve 4 9 opens the passage 37 by the air pressure in the piston upper chamber 32, and a part of the air in the piston upper chamber 32 passes through the passage 37, the passage 40, and the passage 38 to the bottom of the piston. Pour into chamber 35. The opening area of the passage 37 is larger than the opening area of the exhaust passage 23. Therefore, the amount of air flowing from the piston upper chamber 3 2 through the passage 37 into the piston lower chamber 35 is smaller than the amount of air discharged from the piston upper chamber 3 2 through the exhaust passage 23 to the outer wall 1. Many.

[0047] The striking part 13 operates from the bottom dead center to the top dead center by the pressure of the piston lower chamber 35, and a part of the air in the piston upper chamber 3 2 passes through the exhaust passage 2 3 to the outside. It is discharged to 〇 2020/175 008 12 卩 (：171? 2020 /003664

Be done. When the piston 29 comes into contact with the head valve 24 as shown in Fig. 1, the striking part 13 stops at the top dead center.

[0048] The driving machine 10 has a direction in which the striking part 13 strikes the nail 6 3, that is, the first direction

In the stroke that operates in 1, as shown in FIG. 4, the air in the piston lower chamber 35 is discharged to the outer wall 1 through the passage 38 and the exhaust passage 80. Therefore, it is possible to suppress an increase in the pressure of the piston lower chamber 35 during the stroke in which the striking portion 13 operates in the first direction. Therefore, it is possible to suppress the loss of operating energy of the striking portion 13. Further, in order to set the operating energy of the striking section 13 to the target value, it is possible to reduce the amount of compressed air supplied to the pressure accumulating chamber 21 or reduce the volume of the pressure accumulating chamber 21. is there.

Further, as shown in FIGS. 6 and 7, in the driving machine 10, a part of the air in the piston upper chamber 32 passes through the passage 37, the passage 40, and the passage 38 to the piston lower side. The striking part 13 operates from the bottom dead center toward the top dead center by flowing into the chamber 35. Therefore, the passage 40 has a volume through which air can pass. In other words, the passage 40 does not require a storage volume of air to generate the pressure that operates the striking portion 13 from the bottom dead center to the top dead center. Therefore, the driving tool 10 can prevent the housing 11 from increasing in size in the radial direction around the center line 81 or in the direction along the center line 81. Furthermore, the driving machine 10 can reduce air consumption.

[0050] Further, when the user releases at least one of the operation force for the trigger 14 or separates the push lever 16 from the mating material 67, the compressed air is discharged from the control chamber 4 4. As a result, the sleeve 39 operates from the exhaust position to the standby position, and the striking portion 13 operates from bottom dead center to top dead center.

[0051] Further, as shown in Fig. 2, the sleeve 39 is placed in the piston lower chamber 3 while the operation force for the trigger 14 is released and the push lever 16 is separated from the mating member 67. It is stopped at the standby position where 5 and the exhaust passage 80 are cut off. Therefore, the striking portion 13 surely stops at the top dead center due to the pressure in the piston lower chamber 35. 〇 2020/175008 13 卩(：171? 2020/003664

(Second Embodiment) A second embodiment of the driving tool will be described with reference to FIGS. 8 and 9. The driving machine 100 has a housing 101, an ejecting section 102, a striking section 103, a push lever valve 104 and a trigger valve 105. The housing 10 1 has a body portion 10 6, a handle 10 7 and a head cover 10 8. The body 6106 has a cylindrical shape, and the handle 1107 is connected to the body 1106. The head cover 108 is fixed to the first end portion in the longitudinal direction of the body portion 106. Moreover, the injection part 102 is fixed to the second end of the body part 106 in the longitudinal direction. The air hose is connected to the handle 107. The striking portion 103 is provided inside the trunk portion 106. The striking part 103 can be actuated along the center line 0 1 in the first and second orientations 1 and 2, that is, it can be translated.

A cylinder 10 9 is provided in the body portion 10 6. Center line ○ 1 is cylinder

It is the center line of 109. The cylinder 10 9 is movable in the direction along the center line 0 1 with respect to the housing 10 1. A pressure accumulating chamber 110 is provided in the handle 107, the body 106, and the head cover 108. The compressed air passes through the air hose and enters the accumulator chamber 110.

[0054] The mount portion 1 15 is provided inside the head cover 1 08, and the valve seat 1 1 9 is attached to the mount portion 1 1 5. The valve seat 1 19 has passages 1 17. The head cover 108 has an exhaust passage 1 12 and an exhaust valve chamber 1 14. The exhaust passage 1 1 2 is connected to the outer port 1 of the housing 1 0 1. The mount portion 1 15 supports the exhaust valve 1 1 8. The exhaust valve 1 18 is movable in the direction along the center line 0 1 with respect to the mount portion 1 15. Exhaust valve 1 1 8 opens and closes passage 1 1 7. Valve seat 1 19 is mounted on mount 1 15 The valve sheet 1 19 is made of synthetic rubber and has an annular shape.

The striking part 103 has a piston 1 21 and a driver blade 1 22. The piston 1 21 is provided in the cylinder 1 09, and the piston 1 2 1 is movable in the cylinder 1 09 in the direction along the center line 0 1. In the cylinder 109, between the mount part 1 15 and the piston 1 2 1, 〇 2020/175008 14 卩(: 171-1?2020/003664

Has been formed.

[0056] The pressure in the piston upper chamber 120 is applied to the piston 1 21. The striking portion 103 is urged by the pressure in the piston upper chamber 120 in a direction along the center line 0 1 away from the valve seat 1 19. A seal member 1 21 8 is attached to the outer peripheral surface of the piston 1 21. The seal member 1218 contacts the inner peripheral surface of the cylinder 109.

Further, the bumper 1 28 is provided inside the body portion 10 6. The bumper 1 2 8 is provided between the piston 1 2 1 and the injection portion 1 0 2 in the direction along the center line 0 1. The bumper 1 28 is a cushioning member made of synthetic rubber. The bumper 1 2 8 has a shaft hole 1 2 9. The bumper 1 28 is in contact with the injection portion 102, and a part of the bumper 1 28 is arranged in the cylinder 1 09. Of the ends in the direction along the center line <3 1 of the cylinder 1 09, the end located near the bumper 1 28 can contact and separate from the bumper 1 28.

[0058] The piston 1 2 1 and the injection part 1 0 in the direction of the center line 0 1 in the cylinder 10 9

Piston lower chamber 1 2 3 is provided between 2 and. The seal member 1 2 1 8 hermetically separates the piston upper chamber 1 20 and the piston lower chamber 1 2 3.

The body portion 10 6 and the cylinder 10 9 form a passage 1 24. The passage 1 2 4 is formed between the inner surface of the body portion 10 6 and the outer surface of the cylinder 10 9. The passage 1 2 4 is formed in a ring shape outside the cylinder 1 09 in the radial direction of the cylinder 1 09.

[0060] Passages 1 2 5 and 1 2 6 are provided to penetrate the cylinder 10 9 in the radial direction.

The passage 1 2 5 is located between the valve seat 1 1 9 and the injection portion 1 0 2 in a direction along the center line <3 1. A plurality of passages 125 are provided at intervals in the circumferential direction of the cylinder 109. The passage 1 2 6 is located between the passage 1 2 5 and the injection portion 10 2 in a direction along the center line <3 1. Valves 127 are mounted on the outer circumference of cylinder 109. The valve 1 27 is, for example, a ring made of synthetic rubber. The valve 1 27 is elastically deformable in the radial direction of the cylinder 1 09, and the valve 1 27 opens and closes the passage 1 25. When valve 1 2 7 opens passage 1 2 5 the cylinder 1 0 9 〇 The air in 2020/175008 15 (:171? 2020/003664 flows through passage 1 2 5 to passage 1 2 4. When valve 1 2 7 closes passage 1 2 5, valve 1 2 7 The air in passage 1 2 4 blocks the flow of air into cylinder 1 09. Valve 1 27 can be defined as a check valve.

Further, a storage chamber 200 is formed between the body portion 106 and the cylinder 109. The accommodating chamber 200 is formed outside the cylinder 109 in the radial direction of the cylinder 109. A biasing member 1300 is provided in the storage chamber 200. The containment chamber 200 is connected to the passage 1 2 4. The urging member 1300 urges the cylinder 1109 in a direction along the center line 〇1 so as to approach the valve seat 1109. The urging member 130 is, for example, a metal compression spring.

The body portion 106 has an exhaust passage 20 1. The exhaust passage 201 passes through the body portion 106 in the radial direction. A plurality of exhaust paths 201 are provided at intervals in the circumferential direction of the body section 106. The exhaust path 201 is connected to the outside 0 1.

[0063] The injection section 102 has a flange 1331, a tubular section 132 and an injection passage 1333.

The flange 1 3 1 is fixed to the body portion 1 06, and the flange 1 3 1 is connected to the tube portion 1 3 2. The injection passage 1 3 3 is formed in the cylindrical portion 1 3 2. The injection path 1 3 3 is connected to the shaft hole 1 2 9. The driver blade 1 2 2 can move in the axial hole 1 2 9 and the injection path 1 3 3 in the direction along the center line (3 1). It contacts the outer surface and prevents the air in the lower chamber 1 2 3 of the piston from leaking to the injection passage 1 3 3.

[0064] A push lever 1 3 4 is attached to the ejection unit 10 2, and the push lever 1 3 4 is movable with respect to the ejection unit 10 2 in a direction along the center line (3 1. 1 3 4 is connected to the shaft member 1 6 6.

[0065] A holder 135 is provided in the body 106. The holder 1 3 5 is annular, and the holder 1 3 5 is arranged outside the cylinder 1 09 in the radial direction of the cylinder 1 09. The holder 1 3 5 does not move in the direction along the center line (3 1) with respect to the body 1 06. The holder 1 3 5 has the passage 1 3 6 and the passage 1 3 6 has the accumulator chamber 1 1 The holder 1 3 5 separates the passage 1 2 4 from the control chamber 1 3 9. The cylinder 1 10 9 is provided with flanges 1 3 7 and 1 3 8 on the outer peripheral surface. 〇 2020/175008 16 卩(: 171-1? 2020/003664

There is. The flanges 1 3 7 and 1 3 8 are arranged at different positions in the direction along the center line 0 1. A control room 139 is provided between the cylinder 109 and the holder 135, and is provided between the flange 137 and the flange 138. The passage 1336 connects the control room 1339 and the accumulator 1110.

A partition wall 140 is provided inside the body portion 106, and is provided so as to surround the outer periphery of the cylinder 109. The partition wall 140 has an annular shape, and a control chamber 1414 is formed between the partition wall 140 and the flange 1370. The partition wall 140 separates the control room 141 and the pressure storage room 110.

[0067] The flange 1 3 7 receives the pressure of the control chamber 1 41 and the control chamber 1 39,

1 3 8 receives the pressure of the control room 1 3 9. Therefore, the cylinder 10 9 is urged in the direction along the center line (3 1) by the pressure in the control chamber 1 41 and the control chamber 1 39.

[0068] The trigger valve 105 and the push lever valve 104 have the following structures. The push lever valve 104 has a pressure chamber 180, a plunger 144, a valve body 145, a valve member 1446, and a biasing member 1447. Biasing member

1 47 is a compression spring made of metal as an example, and the biasing member 1 47 biases the valve member 1 4 6. The valve body 1 4 5 has a passage 1 4 3 and an exhaust passage 1 6 1. A passage 1600 is provided over the body 1106 and the head cover 1 08, and the passage 1660 is connected to the control room 141 and the passage 1434. Exhaust air channel 1 6 1 is connected to external port 1. A biasing member 1 6 2 for biasing the plunger 1 4 4 is provided. The biasing member 1 62 is, for example, a metal spring.

[0069] Triggers 1 48 are attached to the housing 10 1. The trigger 1 48 is rotatable about the trigger axis 1 4 9 within a predetermined angle range. The trigger valve 105 has a tubular guide portion 151, a ball-shaped valve member 155, and a plunger 157. The guide part 1 5 1 is attached to the handle 1 0 7. The plunger 157 is operable with respect to the guide part 155.

[0070] A magazine 169 containing a plurality of nails 168 is attached to the injection section 102. 〇 2020/175008 17 卩(: 171-1? 2020/003664

ing. Each time the driver blade 1 2 2 hits one nail 1 6 8, one next nail 1 6 8 is sent from the magazine 1 6 9 to the injection path 1 3 3.

[0071] An example of using the driving machine 100 will be described. If at least one of the fact that the operating force for the trigger 1 48 is released or the push lever 1 3 4 is separated from the mating material 1 70, the trigger valve 10 5 and pusher Valve 1 0 4 is in the initial state.

[0072] The trigger valve 105 in the initial state shuts off the accumulator chamber 110 and the pressure chamber 180. The push lever valve 104 in the initial state shuts off the pressure chamber 180 and the passage 143, and also connects the passage 143 and the exhaust passage 161. For this reason, the compressed air in the exhaust valve chamber 1 1 1 4 and the compressed air in the control chamber 1 4 1 are discharged from the passages 1 6 0, 1 4 3 and the exhaust passage 1 6 1 to the outside 0 1. Also, the exhaust valve 1 18 opens the passage 1 1 7.

The cylinder 109 is urged by the pressure of the control chamber 139 and the urging force of the urging member 1300 so as to approach the valve seat 119 in the direction of the center line 0 1. The cylinder 109 is stopped in the standby position pressed against the valve seat 1109 as shown in FIG. Cylinder 109, which is stopped at the standby position, shuts off pressure accumulation chamber 110 and piston upper chamber 120.

[0074] When the cylinder 109 is stopped in the standby position, the piston upper chamber 120

1 1 7 and exhaust path 1 1 2 connect to outside 0 1. Further, the cylinder 109 that is stopped in the initial state blocks the passage 1 26 and the exhaust passage 20 1 as shown in FIG. The striking portion 10 3 is urged by the pressure of the piston lower chamber 1 2 3 so as to approach the valve seat 1 1 9. The piston 1 2 1 is pressed against the valve seat 1 1 9 as shown in Fig. 8, and the striking part 1 0 3 stops at the top dead center.

[0075] When the user applies an operation force to the trigger 1 48 and the push lever 1 3 4 pushes it against the mating material 1 70, the trigger valve 1 0 5 is in the initial state by the operating force of the trigger 1 4 8. Switches to the operating state. Further, the push lever valve 104 switches from the initial state to the operating state. The activated trigger valve 1 0 5 〇 2020/175 008 18 卩 (：171? 2020 /003664

Connect pressure chamber 110 and pressure chamber 180. Further, the activated push lever valve 104 shuts off the exhaust passage 161 and the passage 143, and connects the passage 143 and the pressure chamber 1800.

Therefore, the compressed air in the pressure accumulating chamber 110 is supplied to the exhaust valve chamber 1114 via the pressure chamber 180 and the passage 160. Exhaust valve 1 1 8 closes passage 1 1 7. That is, the piston upper chamber 120 and the exhaust passage 1 12 are cut off. Further, a part of the compressed air in the passage 1600 is supplied to the control room 1414 via the passage 14-2.

[0077] Then, the cylinder 10 9 is squeezed by the force of the biasing member 1 30 due to the pressure of the control chamber 1 4 1 and the pressure of the control chamber 1 3 9 and the valve seat 1 It operates in the direction away from 1 9. Therefore, the accumulator chamber 110 is connected to the piston upper chamber 120 as shown in FIG. Compressed air flows from the pressure accumulator chamber 110 into the piston upper chamber 120, and the pressure in the piston upper chamber 120 increases. Further, the cylinder 109 separated from the valve seat 11 9 stops at the exhaust position in contact with the bumper 1 28 shown in FIG.

[0078] The striking part 10 3 operates in a direction away from the valve seat 1 19 by the pressure of the Viston upper chamber 120. In this way, the striking part 13 operates from the top dead center toward the bottom dead center. The driver blade 1 2 2 hits the nail 1 6 8 in the injection path 1 3 3 as shown in Fig. 11.

[0079] When the cylinder 109 stops at the exhaust position, the inner surface of the body 1106 is pressed against the valve 127. In other words, the body 106 prevents the valve 127 from elastically deforming due to the pressure in the passage 125, and the body 106 prevents the valve 127 from closing the passage 125. Hold. Further, the cylinder 1109 that has stopped at the exhaust position connects the passage 1226 and the exhaust passage 201. For this reason, in the stroke in which the striking part 13 operates from the top dead center toward the bottom dead center, that is, in the stroke in which it operates in the first facing direction 1, the air in the piston lower chamber 1 2 3 passes through the passage 1 2 6 and the exhaust gas. It is discharged to the outside 0 1 through the route 2 0 1.

[0080] Then, after the operation of driving the nail 168 into the mating member 170 is completed, as shown in FIG. 〇 2020/175008 19 卩(: 171-1? 2020/003664

As described above, the piston 1 2 1 collides with the bumper 1 2 8 and the striking part 10 3 stops at the bottom dead center. The bumper 1 28 absorbs the kinetic energy of the striking part 10 3.

[0081] After the striking part 10 3 reaches the bottom dead center, the user releases the operating force of the trigger 1 48, or the push lever 1 3 4 is separated from the mating member 1 70, Do at least one of the. Then, the trigger valve 105 switches from the operating state to the initial state, and the push lever valve 104 switches from the operating state to the initial state. Therefore, the compressed air in the exhaust valve chamber 1 1 14 and the control chamber 1 4 1 is discharged to the external port 1 through the passage 1 6 0 and the exhaust passage 1 6 1. Therefore, the exhaust valve 11 8 opens the passage 1 17 as shown in FIG. Further, the cylinder 109 is operated in a direction approaching the valve seat 1109 by the pressure of the control chamber 139 and the urging force of the urging member 1300. When the cylinder 109 contacts the valve seat 1109 and stops at the standby position, the cylinder 109 blocks the accumulator chamber 110 and the piston upper chamber 120 as shown in Fig. 13. Refuse.

[0082] Further, when the cylinder 1109 stops at the standby position, the cylinder 1109 connects the passage 1206 and the storage chamber 2000 as shown in Fig. 14 and also connects the passage 1226. Cut off the exhaust path 2 0 1. Further, when the cylinder 109 stops at the standby position, the inner surface of the body portion 106 is separated from the valve 127 as shown in FIG. That is, the valve 1 27 is elastically deformed by the pressure in the passage 1 2 5 to open the passage 1 25. The ventilation area of the plurality of passages 1 2 5 is larger than the ventilation area of the passages 1 1 7. Therefore, the amount of air discharged from the piston upper chamber 120 to the passage 1 2 4 through the passage 1 2 5 passes from the piston upper chamber 1 20 to the passage 1 1 7 and the exhaust passage 1 1 2. More than the amount of air discharged to the outside 0 1.

Then, the air discharged into the passage 1 2 4 flows into the piston lower chamber 1 2 3 through the storage chamber 2 0 0 and the passage 1 2 6. The striking part 103 is operated from the bottom dead center to the top dead center by the pressure of the Viston lower chamber 123. When the piston 1 2 1 contacts the valve seat 1 1 9 as shown in Fig. 8, the striking part 10 3 stops at the top dead center.

[0084] In the driving machine 100, the striking part 10 3 operates in the first direction 1 as shown in FIG. 〇 2020/175 008 20 卩 (：171? 2020 /003664

In the stroke, as shown in FIG. 11, the air in the piston lower chamber 1 2 3 is discharged to the external port 1 through the passage 1 2 6 and the exhaust passage 2 0 1. Therefore, it is possible to prevent the pressure in the piston lower chamber 1 2 3 from rising during the stroke in which the striking portion 10 3 operates in the first direction 1. Therefore, it is possible to suppress the loss of the operating energy of the striking portion 103. Further, since the operating energy of the striking portion 103 is set to the target value, the amount of compressed air supplied to the pressure accumulating chamber 110 can be reduced.

[0085] Further, in the driving machine 100, as shown in Figs. 13 and 14, part of the air in the Viston upper chamber 120 passes through the passages 1 2 4 and 1 2 6 As the piston flows into the lower chamber 1 2 3, the striking part 10 3 operates from the bottom dead center toward the top dead center. Therefore, the passages 1 2 4 need only have a volume through which air can pass. In other words, the passage 1 2 4 does not require a storage volume of air that creates a pressure that operates the striking portion 10 3 from the bottom dead center to the top dead center. Therefore, in the driving tool 100, it is possible to prevent the housing 1101 from increasing in size in the radial direction centered on the center line 0 1 or in the direction along the center line 0 1. Further, the driving machine 100 can reduce the air consumption amount or can reduce the volume of the pressure accumulating chamber 110.

[0086] In addition, when the user releases at least one of the operation force for the trigger 1 48 or separates the push lever 1 3 4 from the mating material 1 7 0, the control room 1 4 1 Compressed air is discharged and the cylinder 109 operates from the exhaust position to the standby position, and the striking part 103 operates from bottom dead center to top dead center. Further, as shown in Fig. 9, the cylinder 1 09 is not connected to the piston lower chamber 1 when the push lever 1 3 4 is separated from the mating material 1 70 while the operating force for the trigger 1 48 is released. It is stopped at the standby position where 2 3 and the exhaust passage 2 0 1 are cut off. Therefore, the striking part 10 3 surely stops at the top dead center due to the pressure in the piston lower chamber 1 23.

[0087] Fig. 15 is an example of a diagram comparing the embodiment of the driving tool and a comparative example of the driving machine. The characteristics of the comparative example of the driving tool are shown in the left half of Fig. 15. The characteristics of the driver embodiment are shown in the right half of FIG. The passage shown in Figure 15 is 〇 2020/175008 21 卩(: 171-1? 2020/003664

Corresponds to passages 40, 1 24. The return chamber shown in Fig. 15 is a space that stores compressed air in order to return the striking part from bottom dead center to top dead center.

[0088] The striking part is located at the bottom dead center at time D1, and the striking part is located at the top dead center at time D2. It can be seen that the maximum value of the pressure in the passage in the embodiment is lower than the maximum value of the pressure in the return chamber in the comparative example. This is because in the embodiment of the driving machine, the striking part operates from the top dead center to the bottom dead center, and the air in the cylinder lower chamber is discharged to the outside of the housing without flowing into the passage. is there.

It can be seen that the maximum value of the air consumption amount in the embodiment is lower than the maximum value of the air consumption amount in the comparative example. This is because the embodiment of the driving tool does not require a storage volume of compressed air for obtaining a pressure for operating the striking portion from the bottom dead center toward the top dead center.

It can be seen that the maximum value of impact energy in the embodiment is higher than the maximum value of impact energy in the comparative example. This is because in the embodiment of the driving machine, the air in the piston lower chamber is discharged to the outside of the housing in the process of operating the striking portion from the top dead center toward the bottom dead center.

[0091] An example of the technical meaning of the matters described in some embodiments is as follows. The driving machine 100, 100 is an example of the driving machine. The striking units 13 3 and 10 3 are examples of striking units. The triggers 1 4 and 1 4 8 and the push levers 1 6 and 1 3 4 are examples of operating members, respectively. The push levers 1 6, 1 3 4 are examples of the contact elements.

[0092] In the present embodiment, "the user applies and releases the operation force" means that the user releases and adds the operation force by touching a part of the body with the operation member, and the operation is performed by the user. Contacting or separating a member from a mating member. The operation member includes a member that directly moves with respect to the housing and a member that rotates within a predetermined angle range with respect to the housing.

[0093] Compressed air is an example of gas. The gas may be a compressed gas, and the compressed gas may be air or an inert gas. As the inert gas, for example, nitrogen gas or noble gas can be used. Compressed gas is either air or an inert gas. 〇 2020/175 008 22 卩 (: 171-1? 2020 /003664

Any As the inert gas, for example, nitrogen gas or noble gas can be used. The first orientation pit 1 is an example of the first orientation, and the second orientation pit 2 is an example of the second orientation.

[0094] The pressure accumulating chambers 2 1 and 1 10 are examples of the gas storage chambers. The gas storage chamber is a space that stores gas supplied from the outside of the housing. The Viston upper chamber 32, 120 is an example of the first gas chamber. The lower piston chamber 35, 123 is an example of the second gas chamber. The first gas chamber and the second gas chamber are spaces in which gas can flow in and out. The sleeve 39, the exhaust passage 80, and the passage 38 are an example of an exhaust mechanism. The cylinder 109, the exhaust passage 201, and the passage 126 are an example of an exhaust mechanism. The housings 11 1 and 101 are examples of housings. The housing is a casing or body having an internal space.

[0095] The sleeve 39, the passages 37, 38, 40, the valve 49, and the control chamber 44 are an example of a return mechanism. The cylinder 109, the passages 124 and 125, the accommodating chamber 200, the valve 1227, the biasing member 130, the control chamber 141, and the control chamber 139 are examples of the returning mechanism. The passages 37, 38, 40, 1 24, 125 and the storage chamber 200 are examples of passages. The passages 37 and 125 are an example of the first passage. The passages 40, 124 and the storage chamber 200 are an example of the second passage. The control rooms 44, 1 41 are examples of the first control room and the second control room, respectively. The sleeve 39 and the cylinder 109 are examples of the operating member and the opening/closing member. The sleeve 39 and cylinder 109 can each be defined as a valve. The top dead center of the striking part 1 3, 10 3 is an example of the first position. The bottom dead center of the striking part 1 3, 10 3 is an example of the second position. The valves 49, 127 are an example of a check valve. The sleeve 39 and the body 106 are examples of holding members. The sleeve 39 is an example of the sleeve.

The exhaust paths 80, 201 are an example of the first exhaust path. The exhaust path 23, 1 12 is an example of the second exhaust path. Cylinders 1 2 and 1 09 are examples of cylinders. The head valve 24 is an example of a valve body. Bumpers 33 and 128 are examples of bumpers. The valve seat 1 1 9 is 〇 2020/175008 23 卩(: 171-1? 2020/003664

Here is an example. The nails 63, 1 68 are an example of fasteners. The fastener may have either an axial shape or an arch shape. The cylinder 109 has a function of connecting and disconnecting a path for supplying and discharging gas to the upper piston chamber 120, and a function of connecting and disconnecting a path for supplying and discharging gas to the lower piston chamber 123. Has the role of.

The driving machine is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the invention. The bumper may be a flexible container filled with gas in addition to synthetic rubber. The operating member only needs to be operable by an operating force, and the operating member includes a lever, a trigger, an arm, a plunger and the like. The passage, the first exhaust passage, and the second exhaust passage need only be able to pass gas, and the passage, the first exhaust passage, and the second exhaust passage each include a gap, a groove, a space, a slit and a hole. .. Explanation of symbols

[0098] 1 0, 1 00 Driving Machine, 1 1 ,1 01 Housing, 1 2, 1 09 Cylinder, 1 3, 10 3 Stroke, 1 4, 1 48 Trigger, 2 1 ,1 1 0 Accumulator , 23, 80, 1 1 2, 201 Exhaust passage, 24 Head valve, 32, 1 2 0 Piston upper chamber, 33, 1 28 Bumper, 35, 1 23 Piston lower chamber,

37, 38, 40, 1 24, 1 25, 1 26 Passage, 39 Sleeve, 44 ,1 39, 1 4 1 Control Room, 49, 1 27 Valve, 1 09 Cylinder, 1 1 9 Valve Seat, 1 30 Energize Member, 200 chamber, Mitsumi 1 1st orientation, º 2 2nd orientation

Claims

\¥0 2020/175008 24 卩(: 17 2020/003664 Claims

[Claim 1] An operating member for applying and releasing an operating force by a user, and a striking part operable in a first direction for striking the fastener and a second direction opposite to the first direction, Gas is supplied when an operating force is applied to the operating member, and a first gas chamber that operates the striking part in the first direction by the pressure of gas, and the striking part by the pressure of the gas A driving machine comprising: a second gas chamber that is operated in a second direction; and a housing having the second gas chamber formed therein.

An exhaust mechanism for discharging the gas in the second gas chamber to the outside of the housing in the stroke in which the striking part operates in the first direction,

When the operating force for the operating member is released after the striking part has been operated in the first direction, the gas is supplied from the first gas chamber to the second gas chamber, and the second gas is supplied. A return mechanism that operates the striking portion in the second direction by the pressure of the chamber,

Equipped with a driving machine.

[Claim 2] The return mechanism is

The passage connecting the first gas chamber and the second gas chamber, and the gas is supplied when the operation force is applied to the operation member, and the gas is discharged when the operation force on the operation member is released. 2. The driving according to claim 1, further comprising: a first control chamber that operates, and an operating member that is operably provided with respect to the housing, and that operates by the pressure of the first control chamber to open and close the passage. Machine.

[Claim 3] The striking portion operates in the first direction from a first position to a second position.

And operating in the second orientation from the second position to the first position,

The exhaust mechanism is

An exhaust path connecting the second gas chamber and the outside of the housing, operable to the housing, and opening/closing the exhaust path 〇 2020/175008 25 卩 (：171? 2020 /003664

Opening and closing member,

Have

The driving tool according to claim 1, wherein the opening/closing member closes the exhaust passage when the striking portion is stopped at the first position.

[Claim 4] A cylinder fixed in the housing and operably accommodating the striking portion,

A valve body operably provided in the housing, capable of contacting and separating from the cylinder;

A bumper provided in the housing and in contact with the striking portion operating in the second direction;

Have

The first gas chamber is formed in the cylinder between the valve body and the striking portion,

The second gas chamber is formed in the cylinder between the striking part and the bumper,

4. The driving machine according to claim 1, wherein when the valve body operates and the valve body separates from the cylinder, gas is supplied to the first gas chamber.

[Claim 5] A cylinder operably provided in the housing and operably accommodating the striking portion,

A valve seat that is fixedly provided in the housing and that allows the cylinder to come into contact with and separate from the valve seat;

Have

The first gas chamber is formed in the cylinder between the valve seat and the striking portion,

The second gas chamber is provided between the striking part and the bumper in the cylinder. 〇 2020/175 008 26 卩 (：171? 2020 /003664

Formed in

The driving machine according to claim 2, wherein when the cylinder operates and the cylinder separates from the valve seat, gas is supplied to the first gas chamber.

[Claim 6] A gas storage chamber, which is provided inside the housing and to which gas is supplied from the outside of the housing,

A second exhaust passage for discharging gas from the inside of the housing to the outside of the housing;

Is further provided,

The gas in the gas storage chamber is supplied to the first gas chamber when an operation force is applied to the operation member,

6. The gas in the first gas chamber is discharged to the outside of the housing through the second exhaust passage when the operating force on the operating member is released. Driving machine.

[Claim 7] The operating member is

A trigger that allows the user to add and release operating force by hand,

When a user comes into contact with a mating material into which the fastener is driven, an operating force is added, and when the user separates from the mating material, the operating force is released, and a contact element,

When the user applies an operation force to the trigger, and brings the contact element into contact with the companion material to apply the operation force to the contact element, gas is supplied to the first gas chamber,

When the user releases at least one of the operating force applied to the trigger and the operating force applied to the contact element, the gas in the first gas chamber is supplied to the second gas chamber. The driving machine according to any one of claims 1 to 6.

[Claim 8] The passage is

A first cylinder that penetrates the cylinder in the radial direction and is connected to the first gas chamber. 〇 2020/175008 27 卩(: 171-1?2020/003664

1 passage,

A second passage formed outside the cylinder and connecting the first passage and the second gas chamber;

Including,

Gas in the cylinder can be discharged to the second passage through the first passage, and gas in the second passage can enter the cylinder through the first passage. A check valve is provided on the outer circumference of the cylinder to prevent

Have

The driving machine according to claim 5, wherein the check valve closes the first passage when an operation force is applied to the operation member.

9. The driving machine according to claim 8, wherein a holding member for holding the first passage in a closed state by the check valve is arranged outside the cylinder in a radial direction of the cylinder. ..

10. The driving machine according to claim 9, wherein the holding member is a sleeve that operates in a direction along the center line of the cylinder by the gas supplied into the housing.

[Claim 11] The second control chamber to which gas is supplied when an operation force is applied to the operation member is

Provided in the housing,

10. The driving machine according to claim 9, wherein the holding member holds the check valve in a state where the check valve closes the first passage when gas is supplied to the second control chamber.