JP6927030B2 - Driving machine - Google Patents

Description

The present invention relates to a driving machine having a pressure accumulator chamber and a pressure chamber in which compressed gas is supplied from the accumulator chamber and the striking portion is operated.

Patent Document 1 describes an example of a driving machine having a pressure accumulator chamber and a pressure chamber in which compressed gas is supplied from the accumulator chamber and the striking portion is operated. The driving machine described in Patent Document 1 has a housing, a pressure accumulator chamber, a trigger as a first operating unit, a pressure adjusting mechanism, a second operating mechanism for switching the pressure adjusting state of the pressure adjusting mechanism, and a third operating mechanism. It has an air duster. The housing has a main body, a handle provided so as to project from the main body, and a cover attached to the main body. The trigger is provided at the connection point between the housing and the handle. The pressure adjusting mechanism and the second operating mechanism are provided on the handle. The third operating mechanism is provided on the cover.

The trigger switches between a state in which the compressed gas in the accumulator chamber is supplied to the pressure chamber and a state in which the compressed gas in the accumulator chamber is not supplied to the pressure chamber. The pressure adjusting mechanism switches the pressure of the compressed gas in the accumulator chamber between high pressure and low pressure. The air duster can switch between a state in which compressed air is held in the accumulator chamber and a state in which compressed air is discharged from the accumulator chamber. A driving machine having a housing, a pressure accumulator chamber, a trigger as a first operation unit, a pressure adjustment mechanism, a second operation mechanism for switching the pressure adjustment state of the pressure adjustment mechanism, and an air duster as a third operation mechanism It is also described in Patent Document 2.

Japanese Unexamined Patent Publication No. 2015-226952 Japanese Unexamined Patent Publication No. 2016-215353

The inventor of the present application has recognized that a driving machine having a first operating unit, a second operating mechanism, a third operating mechanism, and a pressure adjusting mechanism has a problem that the housing becomes large.

An object of the present invention is to provide a driving machine capable of suppressing an increase in the size of a housing.

In the driving machine of one embodiment, the compressed gas is supplied from the accumulator chamber and the pressure chamber for operating the striking portion, and the compressed gas operated by the user and supplied to the pressure chamber. A first operating mechanism that connects and cuts off the path, a pressure adjusting mechanism that can adjust the pressure of the compressed gas in the accumulator chamber, and a second operating mechanism that is operated by the user and operates the pressure adjusting mechanism. A third operation mechanism operated by a user to switch between a state in which the compressed gas is stored in the accumulator chamber and a state in which the compressed gas is discharged from the accumulator chamber, and a housing having the accumulator chamber and the striking portion. A driving machine provided, the housing has a main body that operably supports the striking portion, and a handle that protrudes from the main body and is gripped by the user. The mechanism is provided at the connection portion between the handle and the main body, and the pressure adjusting mechanism is provided at an end of the handle located opposite to the main body, and the second operating mechanism and the third operating mechanism are provided. Are provided as one.

The driving machine of one embodiment can prevent the housing from becoming large.

It is a side sectional view which shows Embodiment 1 of the driving machine of this invention. It is a side sectional view which shows the main part of the driving machine of FIG. FIG. 2 is an enlarged cross-sectional view of the trigger valve shown in FIG. 2A. It is a side sectional view of the pressure adjustment valve provided in the driving machine of FIG. It is a side sectional view of the air duster provided in the driving machine of FIG. 1 in a state where the pressure in the accumulator chamber is the first pressure. It is a side sectional view of the air duster provided in the driving machine of FIG. 1 in a state where the pressure in the accumulator chamber is the second pressure. It is a top view which shows the position in the rotation direction of the knob of an air duster. It is an air duster provided in the driving machine of FIG. 1, and is a side sectional view of a state in which compressed air in an accumulator chamber is discharged to the outside. It is a side sectional view which shows Embodiment 2 of a driving machine. FIG. 8 is a front sectional view of an air duster provided on the handle of the driving machine of FIG. 8 in a state where the pressure in the accumulator chamber is the first pressure. FIG. 8 is a front sectional view of an air duster provided on the handle of the driving machine of FIG. 8 in a state where the pressure in the accumulator chamber is the second pressure. FIG. 8 is a front sectional view of an air duster provided on the handle of the driving machine of FIG. 8 in a state where compressed air in the accumulator chamber is discharged to the outside. It is a side sectional view which shows Embodiment 3 of a driving machine. FIG. 12 is a cross-sectional view of a pressure adjusting valve and an air duster provided in the driving machine of FIG. 12 in a state in which the air duster corresponds to a high pressure mode. FIG. 13 is a cross-sectional view of the pressure adjusting valve and the air duster of FIG. 13 in a state in which the air duster corresponds to the low pressure mode. FIG. 12 is a cross-sectional view of a pressure adjusting valve and an air duster provided in the driving machine of FIG. 12 in a state in which compressed air in the accumulator chamber is discharged from the air duster. It is a side sectional view which shows Embodiment 4 of a driving machine. FIG. 16 is a cross-sectional view of a second operation unit provided in the driving machine of FIG. 16 in a state in which the second operation unit corresponds to a low pressure mode. FIG. 16 is a cross-sectional view of a second operation unit provided in the driving machine of FIG. 16 in a state in which the second operation unit corresponds to a high pressure mode. FIG. 16 is a cross-sectional view of an air duster provided in the driving machine of FIG. 16 in a state in which the air duster shuts off the accumulator chamber and the exhaust port. FIG. 16 is a cross-sectional view of an air duster provided in the driving machine of FIG. 16 in a state where the air duster is connected to a pressure accumulator chamber and an exhaust port.

Hereinafter, a typical embodiment of the driving machine included in the present invention will be described with reference to the drawings.

(Embodiment 1)
The driving machine 10 shown in FIG. 1 has a housing 11. The housing 11 has a cylinder case 12, a handle 13, and a head cover 14. The cylinder case 12 has a tubular shape, and the handle 13 projects from the cylinder case 12 in the axis C1 direction. The head cover 14 is attached to the cylinder case 12 so as to close the opening of the cylinder case 12. The injection portion 15 is fixed to the cylinder case 12. The injection portion 15 is attached to the cylinder case 12 opposite to the portion where the head cover 14 is attached.

The accumulator chamber 17 is provided from the inside of the handle 13 to the inside of the cylinder case 12, as shown in FIGS. 1 and 2A. The plug 18 is attached to the handle 13, and the air hose can be attached to and detached from the plug 18. The air hose is connected to an air compressor, and compressed air is supplied to the accumulator chamber 17 via the air hose. The plug 18 is attached to the handle 13 at the position farthest from the cylinder case 12 in the axis C1 direction. A trigger 19 is provided in the housing 11, and the trigger 19 can rotate about the support shaft 20. The trigger 19 is urged counterclockwise in FIG. 2A by the force of the rupling 197.

A trigger valve 21 is provided on the handle 13. As shown in FIG. 2B, the trigger valve 21 has a plunger 22, an elastic member 23, and tubular members 180, 181, 184. The tubular members 180 and 184 are provided so as not to move with respect to the handle 13. The elastic member 23 urges the plunger 22. The handle 13 has a passage 182 connected to the accumulator chamber 17. An exhaust passage 183 is formed between the tubular member 184 and the handle 13. The exhaust passage 183 is connected to the external D1. The tubular member 184 has passages 185 and 194. The passage 185 is connected to the main valve chamber 32 via the passage 195. An air chamber 186 is formed between the tubular member 180 and the tubular member 181.

A passage 187 is provided in the tubular member 180. The passage 182 is connected to the passage 187. The passage 187 is connected to the air chamber 186 via the shaft hole 188 of the tubular member 180. The plunger 22 is arranged in the tubular member 181 over the shaft hole 188 and the external D1. The plunger 22 can move in the direction of the axis A9. The plunger 22 is urged in a direction approaching the trigger 19 by the force of the elastic member 23.

In the tubular member 180, the seal members 189 and 190 are attached between the inner peripheral surface of the shaft hole 188 and the outer peripheral surface of the plunger 22. The seal member 190 blocks the shaft hole 188 from the external D1. The seal member 189 connects or shuts off the passage 187 and the air chamber 186. The tubular member 181 is arranged in the tubular member 184. Seal members 191, 192, and 193 are attached to the outer peripheral surface of the tubular member 181. The passage 194 is connected to the passage 182. The seal member 191 shuts off the passage 194 and the air chamber 186. The tubular member 181 is movable in the axis A9 direction. A seal member 196 is attached to the outer peripheral surface of the plunger 22. The seal member 196 contacts the inner peripheral surface of the tubular member 181 to shut off the air chamber 186 and the exhaust passage 183. When the seal member 196 is separated from the inner peripheral surface of the tubular member 181, the air chamber 186 and the exhaust passage 183 are connected to each other.

The push lever 24 is attached to the injection portion 15. The push lever 24 is movable with respect to the injection portion 15. The trigger valve 21 is operated by the operation of the push lever 24 and the operation of the trigger 19.

A cylinder 25 is provided in the cylinder case 12 and in the head cover 14. The cylinder 25 is movable in the axis A1 direction with respect to the cylinder case 12, and a flange 26 is provided on the outer peripheral surface of the cylinder 25. A sealing member 27 is attached to the outer periphery of the flange 26. The valve seat 28 is attached to the end of the cylinder 25 in the axis A1 direction.

A tubular main valve 30 is provided in the head cover 14. The main valve 30 is movable in the axis A1 direction within the head cover 14. An elastic member 31 is provided in the head cover 14, and the elastic member 31 is a metal compression spring. The elastic member 31 urges the main valve 30 in the axis A1 direction, and the main valve 30 is pressed against the valve seat 28 by the force of the elastic member 31.

A main valve chamber 32 is formed between the head cover 14 and the main valve 30. The main valve chamber 32 is connected to the passage 195 shown in FIG. 2B. When the trigger valve 21 is activated, the main valve chamber 32 is switched between the first state and the second state. The first state is a state in which the main valve chamber 32 is cut off from the accumulator chamber 17 and connected to the external D1 of the housing 11. The second state is a state in which the main valve chamber 32 is connected to the accumulator chamber 17 and is shut off from the external D1.

A stopper 33 is provided in the head cover 14, and the stopper 33 has an annular valve seat 34. The port 34A is formed by the main valve 30 and the valve seat 34. When the main valve 30 moves, the port 34A is opened and closed. An exhaust chamber 39 is formed in the head cover 14. The exhaust chamber 39 is connected to the external D1. When the port 34A is opened, the cylinder upper chamber 38 is connected to the external D1 via the exhaust chamber 39. When the port 34A is closed, the cylinder upper chamber 38 and the exhaust chamber 39 are shut off.

Further, the exhaust chamber 39 and the accumulator chamber 17 are separated by a separator 29 which is a part of the head cover 14. The separator 29 has a tubular shape. The compressed air supplied to the accumulator chamber 17 is not directly supplied to the exhaust chamber 39.

The piston 35 is provided so as to be movable in the axis A1 direction in the cylinder 25. The striking portion 70 in which the piston 35 and the driver blade 36 are integrated is formed. The striking portion 70 can move in the axis A1 direction in the cylinder 25. The seal member 37 is attached to the outer periphery of the piston 35. The cylinder case 12 operably supports the striking portion 70 via the cylinder 25. The axis C1 intersects the axis A1. The 10 examples of the driving machine shown in FIG. 1 are examples in which the axis A1 and the axis C1 intersect at 90 degrees. The head cover 14 is attached to an end portion of the cylinder case 12 in the axis A1 direction.

The cylinder upper chamber 38 is provided between the stopper 33 and the piston 35 and inside the main valve 30. The passage 30A is formed by the main valve 30 and the valve seat 28. The passage 30A is a passage connecting the accumulator chamber 17 and the cylinder upper chamber 38. The sealing member 37 comes into contact with the inner peripheral surface of the cylinder 25 to airtightly seal the cylinder upper chamber 38.

The damper 40 is arranged from the inside of the cylinder 25 to the inside of the injection portion 15. The damper 40 is made of synthetic rubber, and the damper 40 has a shaft hole 41. The driver blade 36 can move in the axis A1 direction in the shaft hole 41. The cylinder lower chamber 42 is formed between the piston 35 and the damper 40 in the cylinder 25. In the cylinder 25, a vent 43 is provided between the flange 26 and the damper 40. The vent 43 penetrates the cylinder 25 in the radial direction. A return air chamber 44 is provided in the cylinder case 12 between the flange 26 and the injection portion 15. The vent 43 connects the cylinder lower chamber 42 and the return air chamber 44.

A check valve 45 is provided on the cylinder 25. The check valve 45 is a ring made of synthetic rubber. The check valve 45 is elastically deformed by the air pressure of the cylinder lower chamber 42 to open the vent 43. The check valve 45 comes into close contact with the outer peripheral surface of the cylinder 25 and closes the vent 43. In the cylinder 25, a vent 46 is provided between the vent 43 and the injection portion 15. The vent 46 penetrates the cylinder 25 in the radial direction, and always connects the cylinder lower chamber 42 and the return air chamber 44.

The injection portion 15 has a shaft hole 47 and an injection path 48. The shaft hole 47 is arranged concentrically with the axis line A1, and the driver blade 36 can move in the axis line A1 direction through the shaft hole 47 and the injection path 48.

The magazine 16 accommodates a plurality of nails 52 as fasteners. The plurality of nails 52 are arranged in a row and are connected to each other by using a connecting element. The magazine 16 has a supply mechanism 51, and the supply mechanism 51 supplies the nails 52 in the magazine 16 to the injection path 48 one by one.

Next, an example of using the driving machine 10 will be described. Compressed air is supplied to the accumulator chamber 17, and the air pressure in the accumulator chamber 17 is higher than the atmospheric pressure. When no operating force is applied to the trigger 19, and the push lever 24 is separated from the driven material W1, the cylinder upper chamber 38 is connected to the outside of the housing 11 via the exhaust chamber 39.

Further, if no operating force is applied to the trigger 19, the trigger 19 is stopped at the initial position. The plunger 22 connected to the trigger 19 is stopped at bottom dead center. When the plunger 22 is stopped at bottom dead center, the seal member 189 connects the passage 187 and the air chamber 186. Therefore, the passage 182 is connected to the air chamber 186 via the passage 187 and the shaft hole 188. Further, the seal member 196 shuts off the air chamber 186 and the exhaust passage 183. Further, the passage 182 is always connected to the passage 194. The tubular member 181 receives forces in opposite directions in the axis A9 direction due to the air pressure of the air chamber 186 and the air pressure of the passage 194. Therefore, the tubular member 181 is urged in the axis A9 direction by the force of the elastic member 23, and the tubular member 181 stops at the top dead center closest to the exhaust passage 183.

When the tubular member 181 is stopped at the top dead center, the sealing member 192 is separated from the tubular member 184, and the passage 195 and the passage 185 are connected to each other. Further, the seal member 193 is pressed against the tubular member 184, and the passage 185 and the exhaust passage 183 are blocked from each other. Then, the compressed air in the accumulator chamber 17 is supplied to the main valve chamber 32 via the passage 182 and the passage 195. The main valve 30 receives a first force in the direction away from the head cover 14 in the axis A1 direction. Further, the air pressure in the accumulator chamber 17 is applied to the main valve 30, and the main valve 30 receives a second force in the direction approaching the head cover 14.

The main valve 30 is pressed against the valve seat 28 by the difference between the first force and the second force. That is, the main valve 30 closes the passage 30A, and the air pressure in the accumulator chamber 17 is not transmitted to the cylinder upper chamber 38. Further, the main valve 30 is separated from the valve seat 34 and opens the port 34A. Therefore, the air pressure in the cylinder upper chamber 38 is atmospheric pressure. The piston 35 is urged in the axis A1 direction by the air pressure in the lower chamber 42 of the cylinder, and the piston 35 comes into contact with the stopper 33 and stops at top dead center.

Then, the user grips the handle 13 with one hand, applies an operating force to the trigger 19 with the fingers of the hand holding the handle 13, and the push lever 24 presses the driven material W1. When an operating force is applied to the trigger 19 and the trigger 19 operates counterclockwise in FIG. 2A, the plunger 22 operates in the axial direction A9 against the force of the elastic member 23, and the plunger 22 stops at top dead center. do. When the plunger 22 stops at top dead center, the seal member 189 shuts off the passage 187 and the air chamber 186. Further, the seal member 196 connects the air chamber 186 and the exhaust passage 183, and the air in the air chamber 186 is discharged from the exhaust passage 183 to the outside D1.

Then, the tubular member 181 operates against the force of the elastic member 23 by the air pressure of the passage 194, the seal member 192 blocks the passage 182 and the passage 185, and the seal member 193 forms the passage 185 and the exhaust passage 183. To connect. Therefore, the compressed air in the main valve chamber 32 is discharged to the outside D1 via the passages 195 and 185 and the exhaust passage 183, and the main valve chamber 32 becomes atmospheric pressure.

Then, the main valve 30 operates toward the head cover 14 due to the difference between the force of the elastic member 31 and the force corresponding to the air pressure of the accumulator chamber 17. Therefore, the main valve 30 is separated from the valve seat 28 to open the passage 30A, the valve seat 34 is pressed against the inner peripheral surface of the main valve 30, and the port 34A is closed.

When the main valve 30 and the valve seat 28 are separated from each other to open the passage 30A and the port 34A is closed, the air pressure in the cylinder upper chamber 38 rises due to the air pressure in the accumulator chamber 17, and the piston 35 and the driver blade 36 descend. When the driver blade 36 enters the injection path 48, the driver blade 36 hits the nail 52, and the nail 52 is driven into the material W1 to be driven.

While the piston 35 is operating from the top dead center to the bottom dead center, the air in the cylinder lower chamber 42 passes through the vent 46 and enters the return air chamber 44. When the seal member 37 is located between the stopper 33 and the vent 43 in the axis A1 direction while the piston 35 is moving, the check valve 45 closes the vent 43. When the seal member 37 moves between the vent 43 and the damper 40 while the piston 35 is moving, the check valve 45 opens the vent 43, and a part of the air in the cylinder upper chamber 38 passes through the vent 43. , Enter the return air chamber 44. In this way, the air pressure in the return air chamber 44 and the cylinder lower chamber 42 rises.

Then, after the driver blade 36 drives the nail 52, the user releases the operating force on the trigger 19 and separates the end portion 63 of the push lever 24 from the driven material W1. Then, the push lever 24 returns to the initial position and stops. Further, the plunger 22 operates in the axis A9 direction by the force of the elastic member 23, and the plunger 22 stops at the bottom dead center. When the plunger 22 stops at bottom dead center, the seal member 189 connects the air chamber 186 with the passage 187. Further, the seal member 196 shuts off the air chamber 186 and the exhaust passage 183. Therefore, the air pressure in the air chamber 186 rises. The tubular member 181 operates toward the exhaust passage 183 by the force of the elastic member 23 and stops. Then, the seal member 192 connects the passage 194 and the passage 185, and the seal member 193 blocks the passage 185 and the exhaust passage 183.

Therefore, the compressed air in the accumulator chamber 17 is sent to the main valve chamber 32, and the air pressure in the main valve chamber 32 rises. The main valve 30 operates in a direction away from the head cover 14, opens the port 34A, and shuts off the passage 30A. Further, the cylinder upper chamber 38 is connected to the outside of the housing 11 via the exhaust chamber 39, and the cylinder upper chamber 38 becomes atmospheric pressure.

Further, the piston 35 that has reached the bottom dead center after the driver blade 36 has driven the nail 52 moves toward the top dead center by the air pressure of the cylinder lower chamber 42, and the driver blade 36 rises together with the piston 35. The piston 35 comes into contact with the stopper 33, and the piston 35 stops at top dead center.

The driving machine 10 has a pressure adjusting mechanism. The pressure adjusting mechanism includes a pressure adjusting valve 71 and an air duster 72. The pressure adjusting valve 71 is a mechanism capable of adjusting the pressure in the accumulator chamber 17 while compressed air is being supplied to the accumulator chamber 17. The air duster 72 also has a function as a second operating mechanism for switching the state of the pressure adjusting valve 71 and a function as a third operating mechanism for discharging compressed air from the accumulator chamber 17 to the external D1.

The pressure adjusting valve 71 is arranged in the direction of the axis C1 between the portion where the trigger valve 21 is arranged and the end of the handle 13 which is farthest from the cylinder case 12. As shown in FIG. 3, the pressure adjusting valve 71 has a casing 73, an operating member 74, a valve seat 75, an end cover 76, and a valve body 77. The end cover 76 is fixed to the handle 13 by the screw member 311. The casing 73 has a tubular portion 78 and a flange portion 79, and the flange portion 79 is sandwiched between the handle 13 and the end cover 76. An air chamber 82 is formed between the end cover 76 and the valve seat 75. The end cover 76 has a mounting hole 80, and the plug 18 is mounted in the mounting hole 80. The passage 83 of the plug 18 is connected to the air chamber 82.

In FIG. 3, the valve seat 75 is fixed so as not to move in the casing 73. The valve seat 75 has a passage 81, which is connected to the air chamber 82. The operating member 74 has a cylindrical shape, and the operating member 74 can move in the axis A4 direction. The operating member 74 has a passage 93, and the passage 93 connects the passage 81 and the accumulator chamber 17. When the air hose is connected to the plug 18, the compressed air in the air hose is supplied to the accumulator chamber 17 via the passage 83, the air chamber 82, the passage 81 and the passage 93.

An air chamber 87 is provided between the inner surface of the tubular portion 78 and the outer surface of the operating member 74. The urging member 84 is provided in the air chamber 87. The air chamber 87 is sealed by the sealing members 88 and 89. The urging member 84 urges the operating member 74 in the direction of the axis A4 in a direction that brings the operating member 74 closer to the valve seat 75. The urging member 84 is, for example, a metal compression spring.

As shown in FIG. 3, a shaft 85 is provided on the operating member 74, and the shaft 85 is arranged over the passage 81 and the air chamber 82. A valve body 77 is attached to a portion of the shaft 85 located in the air chamber 82. The valve body 77 is made of synthetic rubber as an example. An urging member 86 is provided in the air chamber 82. The urging member 86 urges the valve body 77 in a direction that brings the valve body 77 closer to the valve seat 75. A port 121 is formed between the valve body 77 and the valve seat 75. The urging member 86 is, for example, a metal compression spring. A pipe 90 is provided in the handle 13, and the pipe 90 has a passage 91. A passage 92 is formed in the handle 13, and the passage 91 connects the passage 92 and the air chamber 87.

The air duster 72 is provided on the head cover 14. The air duster 72 is a valve, and as shown in FIG. 4, the air duster 72 has a first movable element 94, a second movable element 95, a shaft member 96, a receiving member 97, and a storage chamber 98. The accommodation chamber 98 is a hole provided in the head cover 14. The first movable element 94, the second movable element 95, the shaft member 96, and the receiving member 97 are arranged in the accommodation chamber 98. The first movable element 94 is rotatable about the axis A4 with respect to the head cover 14. An annular retaining 176 is attached to the outer peripheral surface of the first movable element 94. The retaining 176 is pressed against the inner surface of the containment chamber 98. Therefore, the first movable element 94 does not move in the axis A4 direction with respect to the head cover 14. Further, the first movable element 94 has a tubular shape having a shaft hole 100, and is provided with a passage 101 that penetrates the first movable element 94 in the radial direction. The passage 101 is connected to the shaft hole 100. An annular inclined surface 122 is formed on the inner surface surrounding the shaft hole 100. The inclined surface 122 is inclined with respect to the axis A4.

As shown in FIG. 4, the head cover 14 is provided with an exhaust port 102, and the exhaust port 102 is connected to the external D1 of the housing 11. The passage 101 is connected to the exhaust port 102. The first movable element 94 has an inclined surface 99 at an end in the axis A4 direction. Seal members 103 and 104 are provided between the inner surface of the accommodation chamber 98 and the outer peripheral surface of the first movable element 94. The sealing members 103 and 104 seal the connection points between the passage 101 and the exhaust port 102.

The second movable element 95 is provided so as to be movable in the accommodation chamber 98 in the axis A4 direction and not to rotate. The second movable element 95 has a tubular shape, and the second movable element 95 has a shaft hole 105. A seal member 106 is attached to the outer peripheral surface of the second movable element 95. An inclined surface 119 is provided at the end of the second movable element 95 on the first movable element 94 side. The inclined surface 119 is inclined with respect to the axis A4.

The receiving member 97 shown in FIG. 4 has a tubular shape, and the receiving member 97 has an exhaust port 107. The exhaust port 107 connects the shaft hole 105 and the outside of the housing 11. The receiving member 97 has an outward flange 108. A space 113 is formed between the outward flange 108 and the second movable element 95 in the accommodation chamber 98. The urging member 109 is arranged in the space 113. The outward flange 108 is pressed against the head cover 14, and the urging member 109 urges the second movable element 95 in the direction of the axis A4 so as to approach the first movable element 94, and the second movable element 95 and the first movable element 95. The movable element 94 is in constant contact with the movable element 94. The urging member 109 is, for example, a metal compression spring.

Seal members 110 and 111 are attached to the receiving member 97. The seal member 110 comes into contact with or separates from the inner surface of the second movable element 95 depending on the position of the second movable element 95 in the axis A4 direction. The seal member 111 is in constant contact with the head cover 14 and shuts off the accommodation chamber 98 and the external D1. The head cover 14 is provided with a passage 112. The passage 112 is connected to the space 113.

The shaft member 96 is arranged over the shaft holes 100 and 105. The shaft member 96 is movable in the axis A4 direction with respect to the first movable element 94 and the second movable element 95. A knob 114 is attached to the end of the shaft member 96. The knob 114 is arranged on the external D1, and the knob 114 can rotate integrally with the shaft member 96. A mark 114A is provided on the knob 114, and the user can visually recognize the mark 114A and recognize the operation position of the knob 114 in the rotation direction. An elastic member 120 is provided between the knob 114 and the first movable element 94. The elastic member 120 is, for example, a metal compression spring. The knob 114 is urged by the force of the elastic member 120 in a direction away from the first movable element 94.

Seal members 115, 116, 117 are attached to the outer peripheral surface of the shaft member 96. The sealing member 115 seals the shaft hole 100. The shaft member 96 is urged together with the knob 114 by the force of the elastic member 120, and the seal member 116 is pressed against the inclined surface 122 of the first movable element 94, so that the knob 114 and the shaft member 96 are opposed to the first movable element 94. Then, it stops at a predetermined position in the axis A4 direction. The seal member 117 contacts the inner surface of the second movable element 95 to form a seal surface.

The head cover 14 is provided with a passage 118. The passage 118 is always connected to the accumulator chamber 17. The passage 112 is always connected to the passage 92.

In the driving machine 10, the striking force applied by the striking portion 70 to the nail 52 is determined according to the pressure of the compressed air supplied to the cylinder upper chamber 38, that is, the pressure of the accumulator chamber 17.

When the nail 52 is driven into the material W1 to be driven, a part of the compressed air in the accumulator chamber 17 is supplied to the main valve chamber 32 and discharged from the exhaust passage 183 to the outside D1. A part of the compressed air in the accumulator chamber 17 is supplied to the cylinder upper chamber 38 and discharged from the exhaust chamber 39 to the outside D1. Further, a part of the compressed air in the accumulator chamber 17 is supplied to the air chamber 186 and discharged from the exhaust passage 183 to the outside D1. The air pressure in the accumulator chamber 17 decreases when the nail 52 is driven into the material W1 to be driven.

The function of the pressure adjusting valve 71 to adjust the pressure in the accumulator chamber 17 will be described. The compressed air in the air hose flows into the accumulator chamber 17 via the passage 83, the air chamber 82, the port 121, the passage 81, and the passage 93. The operating member 74 receives an urging force F1 in a direction approaching the valve seat 75 and an urging force F2 in a direction away from the valve seat 75. The urging force F1 is determined according to the pressure of the air chamber 87, the pressure receiving area of the operating member 74, and the urging force of the urging member 84. The urging force F2 is determined according to the pressure of the compressed air entering the gap between the operating member 74 and the valve seat 75 and the pressure receiving area of the operating member 74.

When the urging force F2 is larger than the urging force F1, the operating member 74 is separated from the valve seat 75 and the port 121 is closed. When the urging force F2 is smaller than the urging force F1, the operating member 74 comes into contact with the valve seat 75 and stops, and the port 121 is open. When the urging force F1 and the urging force F2 are the same, the operating member 74 does not operate.

When the pressure in the accumulator chamber 17 exceeds a predetermined pressure, the urging force F2 received by the operating member 74 is larger than the urging force F1, and the port 121 is closed. When the pressure in the accumulator chamber 17 becomes equal to or lower than the predetermined pressure and the urging force F2 received by the operating member 74 becomes smaller than the urging force F1, the operating member 74 operates in a direction approaching the valve seat 75, and the port 121 opens. When the port 121 is opened, the compressed air in the air chamber 82 is supplied to the accumulator chamber via the port 121, the passage 81, and the passage 93, and the pressure in the accumulator chamber 17 rises.

When the pressure in the accumulator chamber 17 exceeds a predetermined pressure and the urging force F2 received by the operating member 74 becomes larger than the urging force F1, the operating member 74 separates from the valve seat 75 and the port 121 closes. In the pressure adjusting valve 71, the operating member 74 operates according to the pressure in the accumulator chamber 17. The pressure adjusting valve 71 adjusts the actual pressure of the accumulator chamber 17 so as to keep it within a predetermined pressure range.

In the driving machine 10 of the present disclosure, a predetermined pressure range can be switched to a plurality of stages by the user operating the air duster 72. The plurality of stages are, for example, two stages of a low pressure mode and a high pressure mode.

First, an example in which the user selects the low voltage mode will be described. The user stops the position of the knob 114 in the rotation direction at the first operation position shown in the upper part of FIG. When the user stops the knob 114 at the first operation position, the first movable element 94 stops at the first rotation position shown in FIG. 4 in the rotation direction about the axis A1. When the first movable element 94 stops at the first rotation position with respect to the second movable element 95, the inclined surface 99 and the inclined surface 119 intersect. Further, the second movable element 95 is pushed toward the flange 108 against the urging force of the urging member 109, and the second movable element 95 is the position closest to the flange 108 in the axis A4 direction, that is, , Stop at the first position.

When the first movable element 94 stops at the first position shown in FIG. 4, the seal member 106 is pressed against the inner surface of the accommodating chamber 98, and the seal member 106 blocks the passage 118 and the passage 112. Therefore, the compressed air in the accumulator chamber 17 is not supplied to the air chamber 87, and the pressure in the air chamber 87 is the first adjusting pressure.

Next, an example in which the user selects the high voltage mode will be described. The user stops the position of the knob 114 in the rotation direction as the second operation position shown in the lower part of FIG. When the knob 114 stops at the second operating position, the first movable element 94 stops at the second rotation position shown in FIG. 5 with respect to the second movable element 95 in the rotation direction about the axis A1. When the first movable element 94 stops at the second rotation position, the inclined surface 99 and the inclined surface 119 are parallel to each other. Further, the second movable element 95 is stopped at the position farthest from the flange 108, that is, the second position by the urging force of the urging member 109.

When the second movable element 95 stops at the second position, the seal member 106 separates from the inner surface of the accommodating chamber 98, and the seal member 106 connects the passage 118 and the passage 112. Therefore, the compressed air in the accumulator chamber 17 is supplied to the air chamber 87, and the pressure in the air chamber 87 is the second adjusting pressure. The second adjusting pressure is higher than the first adjusting pressure.

Further, when the second movable element 95 stops at the second position, the seal member 110 comes into contact with the inner peripheral surface of the second movable element 95, and the seal member 110 blocks the shaft hole 105 and the space 113. Therefore, it is possible to prevent the compressed air passing through the space 113 from being discharged from the exhaust port 107 to the outside D1.

In this way, the user operates the air duster 72 to switch the pressure of the air chamber 87 between the first adjusting pressure and the second adjusting pressure, so that the pressure range of the accumulator chamber 17 adjusted by the pressure adjusting valve 71 can be adjusted. You can switch between two stages. The pressure range of the accumulator chamber 17 corresponding to the high pressure mode is higher than the pressure range of the accumulator chamber 17 corresponding to the low pressure mode.

Next, an example in which the user operates the air duster 72 to discharge the compressed air in the accumulator chamber 17 to the outside D1 will be described. The user applies an operating force in the axis A4 direction to the knob 114 of the air duster 72 with the fingers of the hand holding the handle 13.

The knob 114 shown in FIGS. 4 and 5 is in a state in which the user does not apply an operating force in the axis A4 direction to the knob 114. The knob 114 is pushed by the force of the elastic member 120, and the seal member 116 is pressed against the inclined surface 122, so that the shaft member 96 and the knob 114 stop at the initial positions in the axis A4 direction with respect to the first movable element 94. ing. When the shaft member 96 is stopped at the initial position, the seal member 116 blocks the passage 118 and the passage 101. Therefore, the compressed air in the accumulator chamber 17 is not discharged from the exhaust port 102 to the external D1.

The knob 114 shown in FIG. 7 is a state in which the user applies an operating force in the axis A4 direction to the knob 114, that is, a state in which the knob 114 is pressed. The knob 114 operates against the force of the elastic member 120, and when the knob 114 comes into contact with the head cover 14, the knob 114 and the shaft member 96 stop at an operating position in the axis A4 direction with respect to the first movable element 94. doing. When the shaft member 96 is stopped at the operating position, the seal member 116 is separated from the inclined surface 122, and the passage 118 and the passage 101 are connected to each other. Therefore, the compressed air in the accumulator chamber 17 is discharged to the outside D1 from the exhaust port 102.

When the second movable element 95 is closest to the flange 108 and stopped as shown in FIG. 7, the seal member 106 is separated from the inner surface of the accommodation chamber 98, and the passage 112 and the shaft hole 100 are connected to each other. Therefore, the compressed air in the air chamber 87 is discharged to the outside D1 via the passage 112 and the exhaust port 102. Further, when the user releases the operating force applied to the knob 114 in the axis A4 direction, the knob 114 and the shaft member 96 move in the axis A4 direction by the force of the elastic member 120, and the seal member 116 comes into contact with the inclined surface 122. , Knob 114 and shaft member 96 stop at the initial position.

Further, the seal member 117 contacts the inner surface of the second movable element 95 to form a seal surface regardless of the positions of the first movable element 94 and the second movable element 95 in the axial direction A4 direction. Further, the shaft hole 105 is always connected to the outside through the exhaust port 107. Therefore, when the second movable element 95 moves in the axis A4 direction with respect to the first movable element 94, it is possible to suppress an increase in the movement resistance of the second movable element 95.

As described above, the air duster 72 has a first function and a second function. The first function is a function of discharging the compressed air of the accumulator chamber 17 to the outside D1. The second function is a function of switching the state of the pressure adjusting valve 71 for adjusting the pressure in the accumulator chamber 17 while the compressed air is being supplied to the accumulator chamber 17. Therefore, it is not necessary to provide an operating member for switching the state of the pressure adjusting valve 71. Therefore, the driving machine 10 can obtain at least one of the first effect, the second effect, and the third effect.

The first effect is to suppress an increase in the number of parts provided in the housing 11. The second effect is to suppress the increase in size of the housing 11. Specifically, the knob 114, the first movable element 94, and the shaft member 96 are a part of the elements for adjusting the pressure of the compressed air in the accumulator chamber 17, and the compressed air in the accumulator chamber 17 is transferred to the external D1. It is a part of the element to be discharged. That is, the air duster 72 has some parts shared in order to achieve different functions. Therefore, it is possible to suppress the increase in size of the housing 11. Further, the number of operating members protruding in the radial direction of the handle 13, for example, in the direction intersecting the axis C1, can be suppressed, and the housing 11 can be suppressed from becoming larger in the radial direction of the handle 13. The third effect is to improve the operability of the user. Specifically, the user can operate the trigger 19 and the air duster 72 with the fingers of the hand holding the handle 13.

Comparative Example 1 of the driving machine is shown by a chain double-dashed line in FIG. Comparative Example 1 of the driving machine has a handle 400, a pressure adjusting mechanism 401, a second operating mechanism 402 for switching the state of the pressure adjusting mechanism 401, and a plug 403. The plug 403 is provided at the end of the handle 400 in the axis C1 direction. Further, the pressure adjusting mechanism 401 and the pressure adjusting mechanism 401 are arranged side by side in a direction intersecting the axis C1.

In the first embodiment of the driving machine 10, the pressure adjusting valve 71 is provided on the handle 13, and the air duster 72 is provided on the head cover 14. Therefore, the handle 13 of the first embodiment of the driving machine 10 is smaller than the handle 400 of the comparative example 1 of the driving machine in the direction intersecting the axis C1.

(Embodiment 2)
The second embodiment of the driving machine is shown in FIG. In the driving machine 10 shown in FIG. 8, the air duster 72 is arranged at the connection point between the handle 13 and the cylinder case 12. More specifically, the air duster 72 is arranged between the trigger valve 21 and the cylinder 25 in the direction of the axis C1 of the handle 13. The air duster 72 is arranged in the arrangement area of the handle 13 in the direction of the axis A1. When the air duster 72 is viewed in cross section as shown in FIG. 9 on a plane perpendicular to the axis C1, the axis A4 is arranged along the width direction of the handle 13. The accommodation chamber 98 is provided on the handle 13, and the exhaust port 102 is provided on the handle 13. Other configurations of the air duster 72 are the same as the configuration of the air duster 72 shown in FIG. The other configuration of the driving machine 10 shown in FIG. 8 is the same as the configuration of the driving machine 10 shown in FIG.

The air duster 72 shown in FIGS. 9, 10 and 11 can be operated in the same manner as the air duster 72 shown in FIGS. 4, 5 and 7. That is, the user can operate the air duster 72 and the trigger 19 with the fingers of the hand holding the handle 13. Further, the air duster 72 shown in FIGS. 9, 10 and 11 has the same function as the air duster 72 shown in FIGS. 4, 5 and 7. In the air duster 72 shown in FIG. 9, the pressure in the air chamber 87 of the pressure adjusting valve 71 in FIG. 3 can be set to the first pressure, similarly to the air duster 72 shown in FIG. In the air duster 72 shown in FIG. 10, the pressure in the air chamber 87 of the pressure adjusting valve 71 in FIG. 3 can be set to the second pressure, similarly to the air duster 72 shown in FIG.

The air duster 72 shown in FIG. 11 can discharge the compressed air in the accumulator chamber 17 to the outside D1. The operating position of the knob 114 shown in FIGS. 9, 10 and 11 in the rotation direction is the same as the operating position of the knob 114 shown in FIG.

As described above, the driving machine 10 of the second embodiment can obtain the same effect as the driving machine 10 of the first embodiment. Further, in the driving machine 10 of the second embodiment, the air duster 72 is provided on the handle 13. Therefore, it is possible to prevent the space required for arranging the air duster 72 from protruding in the radial direction of the handle 13. The radial direction of the handle 13 is a direction intersecting the axis C1.

Comparative Example 2 of the driving machine is shown by a chain double-dashed line in FIG. Comparative Example 2 of the driving machine has a handle 400, a pressure adjusting mechanism 401, a second operating mechanism 402 for switching the state of the pressure adjusting mechanism 401, and a plug 403. The plug 403 is provided at the end of the handle 400 in the axis C1 direction. Further, the pressure adjusting mechanism 401 and the pressure adjusting mechanism 401 are arranged side by side in a direction intersecting the axis C1. Further, an air duster 404 as a third operation mechanism is provided on the head cover 405. That is, the second operation mechanism 402 and the air duster 404 are separately provided and arranged at different positions.

In the second embodiment of the driving machine 10, an air duster 72 that also serves as a second operating mechanism and a third operating mechanism is provided on the handle 13. Therefore, in the second embodiment of the driving machine 10, the number of parts can be suppressed as compared with the comparative example 2 of the driving machine, and the increase in size can be suppressed. Specifically, the second embodiment of the driving machine 10 is miniaturized in the direction in which the handle 13 intersects the axis C1 with respect to the comparative example 2 of the driving machine.

Further, in the second embodiment of the driving machine 10, the air duster 72 is arranged in the arrangement area of the handle 13 in the axis C1 direction. Therefore, in the second embodiment of the driving machine 10, the head cover 14 is downsized in the axis C1 direction as compared with the comparative example 2 of the driving machine.

(Embodiment 3)
Embodiment 3 of the driving machine is shown in FIG. In the driving machine 10 shown in FIG. 12, a pressure adjusting valve 71 and an air duster 72 are provided at the end of the handle 13 opposite to the cylinder case 12. That is, in the direction of the axis C1, the arrangement range of the pressure adjusting valve 71 and the arrangement range of the air duster 72 overlap at least in a part. Further, the pressure adjusting valve 71 and the air duster 72 are arranged in the arrangement area of the handle 13 in the direction of the axis A1. The trigger 19 and the trigger valve 21 are arranged between the cylinder 25 and the pressure adjusting valve 71 in the axis C1 direction.

As shown in FIG. 13, the pressure adjusting valve 71 has a casing 130, an operating member 131, a valve seat 132, an end cover 133, and a valve body 134. The casing 130 is fixed to the handle 13. Casing 130 has a containment chamber 135 and a support hole 136. The actuating member 131, the valve seat 132 and the end cover 133 are arranged in the accommodation chamber 135. The valve seat 132 is arranged between the actuating member 131 and the end cover 133 in the A5 direction of the axis of the accommodation chamber 135. The axis A5 is parallel to the axis C1. An air chamber 151 is formed between the end cover 133 and the valve seat 132. The end cover 133 has a mounting hole 137, and the plug 18 is mounted in the mounting hole 137. The passage 83 of the plug 18 is connected to the air chamber 151.

The valve seat 132 is fixed so as not to move in the accommodation chamber 135. The valve seat 132 has a passage 138, which is connected to the air chamber 151. The operating member 131 is movable in the axis A5 direction with respect to the casing 130. An urging member 139 is provided in the accommodation chamber 135. The urging member 139 urges the operating member 131 so as to approach the valve seat 132 in the axis A5 direction. The urging member 139 is, for example, a metal compression spring. Casing 130 has space 164 and passage 165. The urging member 139 is arranged in the space 164. The passage 165 connects the space 164 and the support hole 136.

A shaft 140 is provided on the operating member 131, and the shaft 140 is arranged over the passage 138 and the air chamber 151. A valve body 134 is attached to a portion of the shaft 140 located in the air chamber 151. The valve body 134 is made of synthetic rubber as an example. An urging member 141 is provided in the air chamber 151. The urging member 141 urges the valve body 134 in a direction that brings the valve body 134 closer to the valve seat 132. The urging member 141 is, for example, a metal compression spring.

In the accommodation chamber 135, an air chamber 142 is formed between the operating member 131 and the valve seat 132. The air chamber 142 is connected to the air chamber 151 via a passage 138. A passage 143 is provided in the casing 130, and the passage 143 connects the air chamber 142 and the accumulator chamber 17. Sealing members 144 and 145 are provided in the accommodating chamber 135, and the sealing members 144 and 145 seal the air chamber 142.

An air chamber 146 is formed in the accommodation chamber 135 between the outer surface of the operating member 131 and the casing 130. A sealing member 147 is provided in the accommodating chamber 135, and the sealing members 144 and 147 seal the air chamber 146. The casing 130 has a passage 166 that connects the air chamber 146 and the support hole 136. Further, the casing 130 has a passage 172 connecting the air chamber 142 and the support hole 136.

As shown in FIG. 13, the air duster 72 has a first movable element 148, a second movable element 149, a shaft member 150, and a support hole 136. The first movable element 148, the second movable element 149, and the shaft member 150 are arranged in the support holes 136. The first movable element 148 is rotatable in the support hole 136 and does not move in the axis A6 direction. The axis A6 is the center of the support hole 136, and the axis A6 and the axis A5 are parallel to each other. Further, the first movable element 148 has a tubular shape having a shaft hole 152.

A seal member 153 is attached to the outer peripheral surface of the first movable element 148. A groove 174 is provided in the casing 130, and a part of the sealing member 153 is arranged in the groove 174. The first movable element 148 is positioned with respect to the casing 130 in the axis A6 direction by the engaging force between the seal member 153 and the casing 130. The seal member 153 seals the support hole 136. An annular inclined surface 175 is formed at a portion of the first movable element 148 arranged in the support hole 136. The inclined surface 175 is inclined with respect to the axis A6.

A part of the shaft member 150 in the axis A6 direction is arranged in the shaft hole 152. The knob 154 is attached to the shaft member 150. The knob 154 is attached to the shaft member 150 via the pin 155. The first movable element 148 has a support hole 156, and the pin 155 is arranged in the support hole 156. The knob 154 can operate about the axis A6 together with the first movable element 148 via the pin 155. The pin 155 can move in the support hole 156 in the direction of the axis A6. That is, the shaft member 150 can move a predetermined amount in the axis A6 direction with respect to the first movable element 148.

An urging member 157 is provided in the shaft hole 152. The urging member 157 urges the knob 154 in the direction of the axis A6 away from the casing 130. The urging member 157 is, for example, a metal compression spring. A seal member 158 is provided in the shaft hole 152. The seal member 158 seals between the outer peripheral surface of the shaft member 150 and the inner surface of the shaft hole 152.

An exhaust port 159 is provided in the casing 130, and the exhaust port 159 is connected to the outside of the casing 130. The exhaust port 159 is connected to the support hole 136.

The second movable element 149 is provided so as to be movable in the axis A6 direction in the support hole 136 and not to rotate. The second movable element 149 has a tubular shape, and the second movable element 149 has a shaft hole 160. A part of the shaft member 150 is arranged in the shaft hole 160. The shaft member 150 is rotatable about the axis A6 with respect to the second movable element 149. Seal members 161, 162, 163 are attached to the outer peripheral surface of the second movable element 149. An inclined surface 173 is formed at the end of the second movable element 149 that is closer to the first movable element 148. The inclined surface 173 is inclined with respect to the axis A6.

The casing 130 has a wall 167, and a space 168 is formed between the wall 167 in the support hole 136 and the second movable element 149. The wall 167 has a shaft hole 169, and a part of the shaft member 150 is arranged in the shaft hole 169. The shaft hole 169 connects the accumulator chamber 17 and the space 168. A seal member 170 is attached to the outer peripheral surface of the shaft member 150. When the shaft member 150 moves in the axis A6 direction, the seal member 170 contacts or separates from the wall 167 in the shaft hole 169.

An urging member 171 is provided in the space 168. The urging member 171 urges the second movable element 149 so as to approach the first movable element 148 in the axis A6 direction. The second movable element 149 is in constant contact with the first movable element 148. The urging member 171 is, for example, a metal compression spring.

The compressed air sent from the air hose to the passage 83 of the plug 18 flows into the accumulator chamber 17 via the air chamber 151, the passage 138, the air chamber 142, and the passage 143. The operating member 131 shown in FIG. 13 receives urging forces F1 and F2 opposite to each other in the axis A5 direction. The urging force F1 is determined according to the pressure of the air chamber 146 and the pressure receiving area of the operating member 131, the pressure of the space 164 and the pressure receiving area of the operating member 131, and the urging force of the urging member 139. The urging force F2 is determined according to the pressure of the air chamber 142 connected to the accumulator chamber 17 and the pressure receiving area of the operating member 131.

When the urging force F2 is greater than the urging force F1, the actuating member 131 stops away from the valve seat 132 and the port 199 is closed. When the urging force F2 is smaller than the urging force F1, the operating member 131 comes into contact with the valve seat 132 and stops, and the port 199 is open. When the urging force F1 and the urging force F2 are the same, the operating member 131 does not operate.

When the pressure in the accumulator chamber 17 exceeds a predetermined pressure, the urging force F2 received by the operating member 131 is larger than the urging force F1, and the port 199 is closed. When the pressure in the accumulator chamber 17 becomes equal to or lower than the predetermined pressure due to the use of the driving machine 10 and the urging force F2 received by the operating member 131 becomes smaller than the urging force F1, the operating member 131 operates in a direction approaching the valve seat 132. Port 199 opens. When the port 199 is opened, the compressed air in the air chamber 151 is supplied to the accumulator chamber 17 via the port 199, the passage 138, the air chamber 142 and the passage 143, and the pressure in the accumulator chamber 17 rises.

When the pressure of the air chamber 142 connected to the accumulator chamber 17 exceeds a predetermined pressure and the urging force F2 received by the operating member 131 becomes larger than the urging force F1, the operating member 131 separates from the valve seat 132 and the port 199 closes. .. The pressure adjusting valve 71 operates the operating member 131 according to the pressure in the accumulator chamber 17. The pressure adjusting valve 71 adjusts the actual pressure of the accumulator chamber 17 so as to keep it within a predetermined pressure range.

In the driving machine 10 of the present disclosure, the user operates the air duster 72 shown in FIGS. 13 and 14 to set a predetermined pressure range in a plurality of stages, for example, in three stages of a high pressure mode, a medium pressure mode, and a low pressure mode. It is switchable.

First, when the user selects the high pressure mode, the knob 154 and the first movable element 148 are rotated, and as shown in FIG. 13, the first movable element 148 is in a state where the inclined surface 173 and the inclined surface 175 intersect. To stop. Then, the second movable element 149 is pushed by the first movable element 148 and stops at the position closest to the wall 167 against the urging force of the urging member 171. Then, the air chamber 142 is connected to the air chamber 146 via the passage 172, the support hole 136, and the passage 166. Further, the air chamber 142 is connected to the space 164 via the passage 172, the support hole 136, and the passage 165. The urging force F2 received by the operating member 131 is maximum.

The case where the user sets the operation position of the knob 154 to the medium pressure mode will be described. The air chamber 142 is connected to the air chamber 146 via the passage 172, the support hole 136, and the passage 166. Further, the seal member 162 blocks the passage 172 and the passage 165. The urging force F2 received by the operating member 131 when the medium pressure mode is set is smaller than the urging force F2 received by the operating member 131 when the high pressure mode is set.

The case where the user sets the operation position of the knob 154 to the low pressure mode will be described. The user rotates the knob 154 and the first movable element 148, and stops the first movable element 148 in a state where the inclined surface 173 and the inclined surface 175 are parallel to each other as shown in FIG. Then, the second movable element 149 stops at the position farthest from the wall 167, that is, the second position due to the urging force of the urging member 171. The seal member 163 shuts off the air chamber 142 and the passage 172, and also shuts off the space 164 and the passage 172. The urging force F2 received by the operating member 131 when the low pressure mode is set is smaller than the urging force F2 received by the operating member 131 when the medium pressure mode is set.

In this way, the user can arbitrarily switch between the high pressure mode, the medium pressure mode, and the low pressure mode by adjusting the position of the knob 154 in the rotation direction. That is, the urging force F2 received by the operating member 131 can be switched in three stages, and the pressure setting range of the accumulator chamber 17 can be set in three stages. The pressure setting range corresponding to the medium pressure mode is lower than the pressure setting range corresponding to the high pressure mode. The pressure setting range corresponding to the low pressure mode is lower than the pressure setting range corresponding to the medium pressure mode.

Next, an example will be described in which the user operates the air duster 72 shown in FIGS. 13 and 14 to discharge the compressed air from the accumulator chamber 17 to the external D1. The knob 154 shown in FIGS. 13 and 14 is in a state in which the user has not applied an operating force in a direction in which the knob 154 is brought closer to the casing 130 in the axis A6 direction. The urging force of the urging member 157 is transmitted to the shaft member 150 via the pin 155. The pin 155 is pressed against the inner surface of the support hole 156, and the shaft member 150 is stopped at an initial position in the axis A6 direction with respect to the casing 130.

When the shaft member 150 is stopped at the initial positions shown in FIGS. 13 and 14, the seal member 170 is pressed against the shaft hole 169 of the wall 167 to form a seal surface. That is, the seal member 170 shuts off the accumulator chamber 17 and the space 168. Therefore, the compressed air in the accumulator chamber 17 is not discharged from the shaft hole 169.

On the other hand, when the user applies an operating force to the knob 154 and the shaft member 150 to bring the knob 154 closer to the casing 130 in the axis A6 direction, the shaft member 150 stops at the operating position shown in FIG. Then, the seal member 170 separates from the inner surface of the shaft hole 169 of the wall 167. Therefore, the accumulator chamber 17 and the space 168 are connected, and the compressed air in the accumulator chamber 17 is introduced between the first movable element 148 and the second movable element 149 in the space 168, the shaft hole 160, and the support hole 136, and It is discharged to the external D1 via the exhaust port 159. When the user releases the operating force on the knob 154 and the shaft member 150, the shaft member 150 operates by the force of the urging member 171 and stops at the initial position.

As described above, the air duster 72 shown in FIGS. 13, 14 and 15 has the above-mentioned first function and second function. Therefore, the driving machine 10 can obtain at least one of the above-mentioned first effect, second effect, and third effect.

Comparative Example 3 of the driving machine is shown by a chain double-dashed line in FIG. In Comparative Example 3 of the driving machine, an air duster 404 is further provided on the head cover 405. The air duster 404 does not have a function of switching the state of the pressure adjusting mechanism. Therefore, the second operation mechanism is arranged at, for example, the arrangement position of the air duster 72 in the second embodiment of the driving machine 10.

In the second embodiment of the driving machine 10, an air duster 72 that also serves as a second operating mechanism and a third operating mechanism is provided on the handle 13. Therefore, in the third embodiment of the driving machine 10, the number of parts can be suppressed as compared with the comparative example 2 of the driving machine, and the size of the housing 11 can be suppressed. Specifically, in the third embodiment of the driving machine 10, the head cover 14 is made smaller than the comparative example 3 of the driving machine.

(Embodiment 4)
Embodiment 4 of the driving machine is shown in FIG.

The air duster 312 is provided on the head cover 14, and the second operating mechanism 313 is provided on the handle 13. The second operating mechanism 313 is arranged between the trigger valve 21 and the cylinder 25 in the direction of the axis C1. The second operation mechanism 313 is arranged in the arrangement area of the handle 13 in the direction of the axis A1. As shown in FIG. 17, the second operating mechanism 313 includes a first movable element 294, a second movable element 295, a receiving member 297, and a storage chamber 298. The accommodation chamber 298 is a hole provided in the handle 13. The first movable element 294, the second movable element 295, and the receiving member 297 are arranged in the accommodation chamber 298.

The first movable element 294 is rotatable about the axis A7 with respect to the handle 13. An annular retaining 276 is attached to the outer peripheral surface of the first movable element 294. The retaining 276 is pressed against the inner surface of the containment chamber 298. Therefore, the first movable element 294 does not move in the axis A7 direction with respect to the handle 13. Further, in the first movable element 294, a knob 114 is provided at a position located on the external D1. The knob 114 can rotate about the axis A7 together with the first movable element 294.

As shown in FIG. 17, the first movable element 294 has an annular inclined surface 299. The inclined surface 299 is inclined with respect to the axis A7. A sealing member 204 is provided between the inner surface of the accommodation chamber 298 and the outer peripheral surface of the first movable element 294. The seal member 204 seals the storage chamber 298 and the external D1. The first movable element 294 has a shaft portion 292. The shaft portion 292 is provided around the axis A7. The seal member 217 is attached to the outer peripheral surface of the shaft portion 292.

The second movable element 295 is provided so as to be movable in the axis A7 direction in the accommodation chamber 298 and not to rotate. The second movable element 295 has a tubular shape, and the second movable element 295 has a shaft hole 205. A seal member 206 is attached to the outer peripheral surface of the second movable element 295. An inclined surface 219 is provided at an end of the second movable element 295 near the first movable element 294. The inclined surface 219 is inclined with respect to the axis A7. A part of the shaft portion 292 is arranged in the second movable element 295, and the seal member 217 is in contact with the inner peripheral surface of the second movable element 295.

As shown in FIG. 17, the receiving member 297 has a tubular shape, and the receiving member 297 has an exhaust port 207. The exhaust port 207 connects the shaft hole 205 and the external D1. The receiving member 297 has an outward flange 208. A space 213 is formed between the outward flange 208 and the second movable element 295 in the accommodation chamber 298. The urging member 209 is arranged in the space 213. The outward flange 208 is pressed against the handle 13, and the urging member 209 urges the second movable element 295 to approach the first movable element 294 in the axis A7 direction. The urging member 209 is, for example, a metal compression spring.

Seal members 210 and 211 are attached to the receiving member 297. The seal member 210 is in contact with the inner surface of the second movable element 295. The sealing member 211 comes into contact with the handle 13 to seal the storage chamber 298.

As shown in FIG. 17, the handle 13 is provided with a passage 112. The passage 112 is connected to the passage 92. The handle 13 is provided with a passage 118. The passage 118 is always connected to the accumulator chamber 17.

As shown in FIG. 19, the air duster 312 has a support hole 300, a holder 301, and a shaft member 302. The support hole 300 is a recess provided in the head cover 14. The holder 301 has a tubular shape, and the holder 301 is arranged in the support hole 300 and fixed to the head cover 14. The holder 301 has a shaft hole 303, and the shaft member 302 is arranged in the shaft hole 303.

The shaft member 302 can be operated in the axis A8 direction. Seal members 304, 305, and 306 are attached to the outer peripheral surface of the shaft member 302. A passage 307 is provided in the holder 301, and the passage 307 is connected to the exhaust port 102. An inclined surface 308 is provided on a part of the inner surface forming the shaft hole 303. The inclined surface 308 is formed in an annular shape about the axis A8. The inclined surface 308 is inclined with respect to the axis A8. An urging member 309 is provided in the shaft hole 303. The urging member 309 urges the shaft member 302 toward the outside D1 in the direction of the axis A8. The urging member 309 is, for example, a metal compression spring. A button 310 is attached to a portion of the shaft member 302 arranged on the external D1.

An example in which the user operates the air duster 312 with the fingers of the hand holding the handle 13 will be described. Unless the user applies an operating force in the axis A8 direction to the button 310, the shaft member 302 is stopped at the position where the seal member 305 is pressed against the inclined surface 308, that is, at the initial position, as shown in FIG. .. When the shaft member 302 is stopped at the initial position, the seal member 305 shuts off the passage 118 and the passage 307. Therefore, the compressed air in the accumulator chamber 17 is not discharged from the exhaust port 102 to the outside D1.

When the user applies an operating force in the axis A8 direction to the button 310, as shown in FIG. 20, the shaft member 302 is stopped at the operating position operated in the axis A8 direction against the urging force of the urging member 309. When the shaft member 302 stops at the operating position, the seal member 305 is separated from the inclined surface 308. That is, the passage 118 and the passage 307 are connected, and the compressed air in the accumulator chamber 17 is discharged from the exhaust port 102 to the outside D1.

An example in which the pressure in the accumulator chamber 17 is adjusted by operating the second operation mechanism 313 with the fingers of the hand holding the handle 13 when the shaft member 302 is stopped at the initial position as shown in FIG. Will be explained. The user can switch the pressure setting range of the accumulator chamber 17 between the low pressure mode and the high pressure mode by rotating and stopping the knob 114 about the axis A1.

First, when the user selects the low pressure mode, the position of the knob 114 in the rotation direction is set so that the inclined surface 299 and the inclined surface 219 intersect as shown in FIG. The position of the knob 114 in the rotation direction is the first operation position shown in the upper part of FIG. Then, the second movable element 295 is pushed toward the flange 208 against the urging force of the urging member 209, and the second movable element 295 is the position closest to the flange 208 in the axis A4 direction, that is, Stop at the first position.

When the second movable element 95 stops at the first position shown in FIG. 17, the seal member 206 is pressed against the inner surface of the accommodating chamber 298, and the seal member 206 blocks the passage 118 and the passage 112. Therefore, the compressed air in the accumulator chamber 17 is not supplied to the air chamber 87, and the pressure in the air chamber 87 is the first adjusting pressure.

The user stops the position of the knob 114 in the rotation direction at the second operation position shown in the lower part of FIG. Then, as shown in FIG. 18, the inclined surface 299 and the inclined surface 219 become parallel, and the inclined surface 299 and the inclined surface 219 come into contact with each other. Then, the second movable element 295 is stopped at the position farthest from the flange 208, that is, the second position by the urging force of the urging member 209.

When the second movable element 295 is stopped at the second position, the seal member 206 is separated from the inner surface of the accommodating chamber 298, and the passage 118 and the passage 112 are connected to each other. Therefore, the compressed air in the accumulator chamber 17 is supplied to the air chamber 87 via the space 213, the passage 112, and the passage 92. The pressure in the air chamber 87 is the second adjusting pressure. The second adjusting pressure is higher than the first adjusting pressure.

When the second movable element 295 stops at the second position shown in FIG. 18, the seal member 210 contacts the inner peripheral surface of the second movable element 295 to form a seal surface. The seal member 210 shuts off the shaft hole 205 and the exhaust port 207. Therefore, it is possible to prevent the compressed air passing through the space 213 from being discharged from the exhaust port 207 to the external D1.

According to the driving machine 10 of the fourth embodiment, the user can operate the button 310 and the knob 114 with the fingers of the hand holding the handle 13. Therefore, operability is improved. Further, the second operation mechanism 313 is arranged in the arrangement area of the handle 13 in the direction of the axis A1. Therefore, it is possible to prevent a part of the handle 13 from protruding in the radial direction, that is, in the axis A1 direction, or being increased in size.

Comparative Example 4 of the driving machine is shown by a chain double-dashed line in FIG. Comparative Example 4 of the driving machine has a handle 400, a pressure adjusting mechanism 401, a second operating mechanism 402 for switching the state of the pressure adjusting mechanism 401, and a plug 403. The plug 403 is provided at the end of the handle 400 in the axis C1 direction. Further, the pressure adjusting mechanism 401 and the pressure adjusting mechanism 401 are arranged side by side in a direction intersecting the axis C1.

In the first embodiment of the driving machine 10, the pressure adjusting valve 71 is provided on the handle 13, and the air duster 72 is provided on the head cover 14. Therefore, the handle 13 of the fourth embodiment of the driving machine 10 can be made smaller with respect to the handle 400 of the comparative example 4 of the driving machine in a direction intersecting the axis C1.

An example of the correspondence between the matters described in the embodiment and the matters described in the claims will be described. The accumulator chamber 17 is an example of an accumulator chamber, and air is an example of a compressed gas. The striking portion 70 is an example of a striking portion. The cylinder upper chamber 38 is an example of a pressure chamber, and the trigger 19 and the trigger valve 21 are an example of a first operating mechanism. The pressure adjusting valve 71 is an example of a pressure adjusting mechanism. The air duster 72 is an example of a second operating mechanism and an example of a third operating mechanism. The second operating mechanism 313 is an example of the second operating mechanism, and the air duster 312 is an example of the third operating mechanism. The driving machine 10 is an example of a driving machine. The housing 11 is an example of a housing, and the cylinder case 12 is an example of a main body. The handle 13 is an example of a handle. The connection portion between the handle 13 and the cylinder case 12 may be the handle 13, the cylinder case 12, or both the handle 13 and the cylinder case 12. The passage 30A is an example of a path for supplying the compressed gas to the pressure chamber. The axis A1 is an example of the first axis, and the axis C1 is an example of the second axis. The head cover 14 is an example of a cover.

The driving machine is not limited to the above embodiment, and can be variously changed without departing from the gist thereof. For example, as the compressed gas, an inert gas or a rare gas can be used instead of air. The first operating mechanism includes a first operating member operated by the user and a valve operated by operating the first operating member. The first operating member may be any of a lever, an arm, and a button. The second operating mechanism includes a second operating member operated by the user and a valve operated by operating the second operating member. The second operating member may be any of a knob, a lever, and a button arm. The third operating mechanism includes a third operating member operated by the user and a valve operated by operating the third operating member. The third operating member may be any of a knob, a lever, and a button arm. The path for supplying the compressed gas to the pressure chamber may be a port, a passage, an opening, or a space.

Further, the position of the striking portion and the handle may be either a configuration in which the first axis and the second axis intersect at 90 degrees, or a configuration in which the first axis and the second axis intersect at an angle different from 90 degrees. good. The magazine may be either one in which a plurality of nails are arranged in a straight line and accommodated, or one in which a plurality of nails are arranged and accommodated in a spiral shape.

10 ... Driving machine, 11 ... Housing, 12 ... Cylinder case, 13 ... Handle, 14 ... Head cover, 17 ... Accumulation chamber, 19 ... Trigger, 21 ... Trigger valve, 30A ... Passage, 38 ... Cylinder upper chamber, 70 ... Strike Part, 71 ... Pressure adjustment mechanism, 72, 312 ... Air duster, 313 ... Second operation mechanism, A1, C1 ... Axis line.

Claims (11)

A pressure chamber in which compressed gas is supplied from the accumulator chamber and operates the striking part,
A first operating mechanism operated by the user and connecting and blocking a path for supplying the compressed gas in the accumulator chamber to the pressure chamber.
A pressure adjusting mechanism capable of adjusting the pressure of the compressed gas in the accumulator chamber,
A second operating mechanism operated by the user and operating the pressure adjusting mechanism,
A third operation mechanism operated by the user to switch between a state in which the compressed gas is stored in the accumulator chamber and a state in which the compressed gas is discharged from the accumulator chamber.
With the accumulator chamber and the housing having the striking portion,
It is a driving machine equipped with
The housing is
The main body that operably supports the striking part and
A handle that protrudes from the main body and is held by the user.
Have,
The first operating mechanism is provided at a connection portion between the handle and the main body, and is provided.
The pressure adjusting mechanism is provided at an end of the handle located opposite to the main body.
A driving machine in which the second operating mechanism and the third operating mechanism are integrally provided. A pressure chamber in which compressed gas is supplied from the accumulator chamber and operates the striking part,
A first operating mechanism operated by the user and connecting and blocking a path for supplying the compressed gas in the accumulator chamber to the pressure chamber.
A pressure adjusting mechanism capable of adjusting the pressure of the compressed gas in the accumulator chamber,
A second operating mechanism operated by the user and operating the pressure adjusting mechanism,
A third operation mechanism operated by the user to switch between a state in which the compressed gas is stored in the accumulator chamber and a state in which the compressed gas is discharged from the accumulator chamber.
With the accumulator chamber and the housing having the striking portion,
It is a driving machine equipped with
The housing is
The main body that operably supports the striking part and
A handle that protrudes from the main body and is held by the user.
Have,
The first operating mechanism is provided at a connection portion between the handle and the main body, and is provided.
The pressure adjusting mechanism is provided at an end of the handle located opposite to the main body.
A driving machine in which the first operating mechanism and the second operating mechanism are arranged at positions where they can be operated together by the hand holding the handle. The housing further has a cover attached to the end of the body.
The striking portion can move in the first axis direction in the main body, and can be moved.
The handle protrudes from the main body in the direction of the second axis intersecting with the first axis.
The driving machine according to claim 1, wherein the second operating mechanism and the third operating mechanism are provided on the cover. The striking portion can move in the first axis direction in the main body, and can be moved.
The handle protrudes from the main body in the direction of the second axis intersecting with the first axis.
The driving machine according to claim 1, wherein the first operating mechanism and the second operating mechanism are arranged at positions where they can be operated by a hand holding the handle. The driving machine according to claim 4, wherein the first operating mechanism, the second operating mechanism, and the third operating mechanism are arranged at positions where they can be operated by a hand holding the handle. The striking portion can move in the first axis direction in the main body, and can be moved.
The handle protrudes from the main body in the direction of the second axis intersecting with the first axis.
The second operation mechanism and the third operation mechanism are arranged in the direction of the second axis between the connection point between the handle and the main body and the end portion of the handle located opposite to the main body. The driving machine according to claim 1. The housing further has a cover attached to the end of the body.
The striking portion can move in the first axis direction in the main body, and can be moved.
The handle protrudes from the main body in the direction of the second axis intersecting with the first axis.
The driving machine according to claim 2, wherein the third operating mechanism is provided on the cover. Any one of claims 1 to 7, wherein the pressure adjusting mechanism can switch the pressure of the compressed gas in the accumulator chamber between a first pressure and a second pressure higher than the first pressure. The driving machine described in the section. Claiming that the second operation mechanism and the third operation mechanism are integrated includes that at least one of the parts of the second operation mechanism and at least one of the parts of the third operation mechanism are common. Item 3. The driving machine according to any one of Items 1, 3, 4, 5, and 6. The driving machine according to claim 3 or 7, wherein the handle is arranged between the first operating mechanism and the third operating mechanism in the direction of the first axis. The driving machine according to claim 5 or 6, wherein the second operating mechanism and the third operating mechanism are arranged in the arrangement area of the handle in the direction of the first axis.

Images