WO2019171809A1 - Driving device and switching mechanism - Google Patents

Abstract

Provided is a driving device that can keep consumption of compressible gas from increasing. A driving device, having a pressure chamber and a driving unit that acts in a direction to drive a fastener with the pressure of a compressible gas supplied to the pressure chamber, is provided with: a driving control unit 10, 105 that has a drive-enabled state in which the compressible gas can be supplied to the pressure chamber and a drive-blocked state to block driving in which the compressible gas is prevented from being supplied to the pressure chamber; and a switching mechanism 10 that sets the driving control unit 10, 105 to the drive-enabled state when the elapsed time from when an operating force is applied to an operationg member is within a prescribed time and sets the driving control unit 10, 105 to the drive-blocked state when the elapsed time exceeds the prescribed time. The switching mechanism 10 has an operation member 15, 16 operated so as to switch the driving control unit 10, 105 between the drive-enabled state and the drive-blocked state, and an accommodation chamber 34, 35 that accommodates a non-compressible fluid to operate the operation member 15, 16.

Description

Driving machine and switching mechanism

The present invention provides a driving machine having a pressure chamber and a striking portion that operates in a direction of striking a stopper when a compressible gas is supplied to the pressure chamber, and a switching mechanism that can be provided in the driving machine. About.

2. Description of the Related Art A driving machine having a pressure chamber and a striking portion that operates in a direction of striking a stopper when a compressible gas is supplied to the pressure chamber is known. The driving machine described in Patent Document 1 includes a housing, a pressure accumulation chamber, a pressure chamber, a striking portion, a push lever, a cylinder, a trigger, a trigger valve, an injection portion, a magazine, and a delay valve as a switching mechanism. The pressure accumulation chamber is provided in the housing, and compressible gas is supplied to the pressure accumulation chamber. The pressure chamber and the striking portion are provided in the housing, and the striking portion is provided to be operable in the housing. The cylinder is operably provided in the housing, and the cylinder connects and disconnects the pressure chamber and the pressure accumulation chamber. The trigger is rotatably attached to the housing. The push lever is provided so as to be operable with respect to the housing. The injection part is fixed to the housing, and the injection part has an injection path. The magazine houses the stop and the magazine supplies the stop to the injection path.

In the driving machine described in Patent Document 1, when at least one of the operation force is applied to the trigger and the operation force is applied to the push lever is not established, the cylinder is The pressure chamber is shut off. The compressible gas in the pressure accumulating chamber is not supplied to the pressure chamber, and the striking portion stops at the top dead center. That is, the striking portion does not operate in the direction of striking the stopper.

In the driving machine described in Patent Document 1, when both the operation force is applied to the trigger and the operation force is applied to the push lever, the trigger valve operates, And a cylinder act | operates and a pressure accumulation chamber and a pressure chamber are connected. The compressible gas in the pressure accumulating chamber is supplied to the pressure chamber, and the striking portion operates in the direction of striking the stopper.

The operator can select the first mode and the second mode using the driving machine. The first mode is a mode in which the operator applies the operating force to the trigger in a state where the operator applies the operating force to the push lever. The second mode is a mode in which the operating force is applied to the push lever while the operating force is applied to the trigger.

In the driving machine described in Patent Document 1, when the second mode is selected and the operation force is applied to the trigger and within a predetermined time, the delay valve causes the compressible gas in the pressure accumulating chamber to enter the pressure chamber. The supply route is connected. For this reason, if the operating force is applied to the push lever within a predetermined time from the time when the operating force is applied to the trigger, the compressible gas is supplied to the pressure chamber, and the striking portion operates in the direction of striking the stopper.

On the other hand, when a predetermined time is exceeded after the operation force is applied to the trigger, the delay valve shuts off the path for supplying the compressible gas in the pressure accumulation chamber to the pressure chamber. For this reason, even if the operating force is applied to the push lever after a predetermined time has elapsed since the operating force was applied to the trigger in the second mode, the compressible gas is not supplied to the pressure chamber. That is, the delay valve is a switching mechanism that restricts the operation of the striking portion in the direction of striking the stopper under a predetermined condition. The delay valve described in Patent Document 1 operates with a compressible gas.

International Publication No. 2017-115593

The inventor of the present application has a problem that in order to operate the switching mechanism with a compressible gas, a region for accommodating a large volume of the compressible gas is required, or the consumption of the compressible gas may increase. Recognized.

An object of the present invention is to provide a driving machine capable of suppressing an increase in the space and consumption of a compressible gas, and a switching mechanism that can be provided in the driving machine, and provide a lightweight and compact configuration. It is to be.

The driving machine according to an embodiment is supplied to an operating member to which an operator applies an operating force, a pressure chamber to which a compressible gas is supplied when the operating force is applied to the operating member, and the pressure chamber. A striking unit that operates in a direction of striking a stopper with the pressure of the compressible gas, and when the operating force is applied to the operating member, the compressible gas is moved into the pressure chamber. A striking control unit having a striking state capable of being fed to a striking state and a striking prevention state that prevents the compressing gas from being supplied to the pressure chamber when the operating member is operated; When the elapsed time from the time when the operating force is applied to the member is within a predetermined time, the batting control unit is placed in the batting enabled state, and when the elapsed time exceeds the predetermined time, the batting control unit is moved to the batting A switching mechanism to be in a blocking state, and Exchange mechanism has an actuating member for actuating the striking control unit to switch between the striking blocking state and the striking state, a storage chamber containing a non-compressible fluid actuating said actuating member.

In another embodiment, the switching mechanism includes a striking control unit having a striking enabling state in which a compressible gas can be supplied to the pressure chamber and a striking preventing state in which the compressing gas is not supplied to the pressure chamber. A switching mechanism that switches between a possible state and the striking prevention state, the first storage chamber and the second storage chamber, a first connection passage connecting the first storage chamber and the second storage chamber, and the first A first connecting chamber connected to the second receiving chamber, a second connecting passage disposed in parallel with the first passage, an operating member that operates with the pressure of the second receiving chamber, and the first receiving chamber And an incompressible fluid sealed across the second storage chamber, and the incompressible fluid in the first storage chamber passes through the first connection passage and the second storage chamber. The operation member operates to move the batting control unit from the batting enabled state. When the incompressible fluid in the second storage chamber flows into the first storage chamber via the second connection passage, the operation member is operated to switch the hit control unit. The impact prevention state is switched to the impact enable state, and the opening area of the second connection passage is larger than the opening area of the first connection passage.

The driving machine of one embodiment can suppress an increase in the consumption of compressible gas.

It is a whole sectional view showing Embodiment 1 of a driving machine included in the present invention. It is sectional drawing which shows the inside of the head cover of the driving machine shown in FIG. It is sectional drawing which shows the injection part of the driving machine shown in FIG. It is sectional drawing in which all the valves and switching mechanisms provided in the driving machine shown in FIG. 1 are in an initial state. It is sectional drawing of the switching mechanism shown in FIG. FIG. 6 is a bottom cross-sectional view taken along line VI-VI in FIG. 5. FIG. 5 is a cross-sectional view of the trigger valve shown in FIG. 4 in an open state. FIG. 5 is a cross-sectional view of the trigger valve and push lever valve shown in FIG. 4 in an open state. FIG. 5 is a cross-sectional view showing a state in which the switching mechanism shown in FIG. 4 closes a passage leading to a control chamber. FIG. 5 is a cross-sectional view of a state in which the push lever valve is opened in a state in which the switching mechanism shown in FIG. 4 closes the passage leading to the control chamber. FIG. 5 is a cross-sectional view of the trigger valve and push lever valve shown in FIG. 4 in an initial state. It is a fragmentary sectional view showing Embodiment 2 of a driving machine. It is sectional drawing of the switching mechanism provided in the driving machine of FIG. It is sectional drawing which shows the other example of arrangement | positioning of the switching mechanism provided in the driving machine of FIG. It is Embodiment 3 of a driving machine, and is sectional drawing which shows the example which unitized the switching mechanism provided in the driving machine of FIG. FIG. 16 is a cross-sectional view showing an example in which components are attached to the main body instead of the switching mechanism shown in FIG. 15. It is a whole sectional view showing Embodiment 4 of a driving machine. It is sectional drawing which shows the inside of the head cover of the driving machine of FIG. It is sectional drawing which shows the inside of the trunk | drum of the driving machine of FIG. It is sectional drawing which shows the trigger valve and switching mechanism which were provided in the driving machine of FIG. FIG. 20B is an enlarged cross-sectional view of the trigger valve shown in FIG. 20A. FIG. 20B is a cross-sectional view illustrating a state in which the trigger valve illustrated in FIG. 20A is in an intermediate state and compressed air is supplied to the first air chamber of the switching mechanism. FIG. 20B is a cross-sectional view illustrating a state in which the trigger valve illustrated in FIG. 20A is in an operating state and compressed air is discharged from the first air chamber of the switching mechanism. FIG. 20B is a cross-sectional view illustrating a state where the trigger valve illustrated in FIG. 20A is in an intermediate state and the plunger of the switching mechanism is in contact with the lever.

Next, typical embodiments among several embodiments included in the driving machine and the switching mechanism of the present invention will be described with reference to the drawings.

(Embodiment 1) A driving machine 100 shown in FIGS. 1, 2, and 3 includes a main body 101, an injection unit 102, a hitting unit 103, a push lever valve 104, a trigger valve 105, and a switching mechanism 10. The main body 101 includes a body portion 106, a handle 107, and a head cover 108. The body portion 106 has a cylindrical shape, and the handle 107 is connected to the body portion 106. The head cover 108 is fixed to the first end in the longitudinal direction of the body portion 106, and the head cover 108 closes the opening of the body portion 106. In addition, the injection part 102 is fixed to the second end part in the longitudinal direction of the body part 106. A plug 48 is provided on the handle 107. The plug 48 can be attached to and detached from the air hose. The hitting portion 103 is provided inside the trunk portion 106. The striking part 103 is operable in the direction of the center line C1.

A cylinder 109 is provided in the body portion 106. Center line C <b> 1 is a center line of cylinder 109. The cylinder 109 is movable with respect to the main body 101 in the direction of the center line C1. A pressure accumulating chamber 110 is provided in the handle 107, the body portion 106, and the head cover 108. The compressed air supplied from the air hose is stored in the pressure accumulation chamber 110. Compressed air is an example of a compressible gas. The volume of the compressible gas changes due to compression or expansion due to a change in pressure or a change in temperature.

As shown in FIG. 2, a boss 111 is provided on the inner surface of the head cover 108. The boss 111 has a passage 112, a passage 113 and an exhaust valve chamber 114. The passage 113 is connected to the exhaust valve chamber 114. A pipe 199 is provided in the head cover 108, and a passage 160 is provided in the body portion 106. The passage 113 is connected to the passage 160 via a pipe 199.

A mount portion 115 is attached to the boss portion 111. The mount 115 has a passage 116 and a port 117. The port 117 is connected to the passage 112 via the passage 116. The mount portion 115 supports the exhaust valve 118. The exhaust valve 118 is movable in the direction of the center line C1 with respect to the mount 115. When the exhaust valve 118 is activated and stopped, the port 117 is opened and closed.

A valve seat 119 is attached to the mount 115. The valve seat 119 is made of synthetic rubber, and the valve seat 119 has a piston upper chamber 120. The piston upper chamber 120 is connected to the port 117.

The striking portion 103 has a piston 121 and a driver blade 122. The piston 121 and the driver blade 122 may be an integrally molded product. The piston 121 and the driver blade 122 may have different parts fixed thereto. The piston 121 is provided in the cylinder 109, and the piston 121 is operable in the center line C1 direction in the cylinder 109. The pressure in the piston upper chamber 120 is applied to the piston 121, and the piston 121 is urged away from the valve seat 119 in the direction of the center line C1. A seal member 121 </ b> A is attached to the outer peripheral surface of the piston 121. The seal member 121 </ b> A contacts the inner peripheral surface of the cylinder 109.

As shown in FIG. 1, a piston lower chamber 123 is provided between the piston 121 and the injection unit 102 in the direction of the center line C <b> 1 in the cylinder 109. The seal member 121A seals the piston lower chamber 123. A return air chamber 124 is provided between the body 106 and the outer peripheral surface of the cylinder 109. Passages 125 and 126 penetrating the cylinder 109 in the radial direction are provided. The cylinder 109 has a check valve 127, and the check valve 127 opens and closes the passage 125. The passage 126 always connects the piston lower chamber 123 and the return air chamber 124. The passage 126 is disposed between the passage 125 and the injection unit 102 in the direction of the center line C1.

Further, a bumper 128 shown in FIG. 3 is provided in the body portion 106. The bumper 128 is provided between the cylinder 109 and the injection unit 102 in the direction of the center line C1. The bumper 128 is a buffer member made of synthetic rubber. The bumper 128 has a shaft hole 129. A part of the bumper 128 is disposed in the cylinder 109.

Further, an elastic member 130 is provided in the body portion 106, and the elastic member 130 urges the cylinder 109 in a direction approaching the valve seat 119 in the direction of the center line C1. The elastic member 130 is, for example, a metal compression spring. As shown in FIG. 2, the port 171 is formed between the end of the cylinder 109 and the valve seat 119.

As shown in FIG. 3, the injection unit 102 includes a flange 131, a cylindrical part 132, and an injection path 133. The flange 131 is fixed to the body portion 106, and the flange 131 is connected to the tube portion 132. The injection path 133 is formed in the cylindrical portion 132. The injection path 133 is connected to the shaft hole 129. The driver blade 122 is movable in the direction of the center line C <b> 1 within the shaft hole 129 and the injection path 133. A push lever 134 is attached to the injection unit 102, and the push lever 134 is movable in the direction of the center line C1 with respect to the injection unit 102.

A holder 135 is provided inside the body portion 106. The holder 135 is annular, and the holder 135 is disposed outside the cylinder 109 in the radial direction of the cylinder 109. The holder 135 has a passage 136, and the passage 136 is connected to the pressure accumulation chamber 110. Flange 137 and 138 are provided on the outer peripheral surface of cylinder 109. The flanges 137 and 138 are arranged at different positions in the direction of the center line C1. A control chamber 139 is provided between the cylinder 109 and the holder 135 and between the flange 137 and the flange 138. The control chamber 139 is connected to the pressure accumulating chamber 110 through a passage 136.

A partition wall 140 that separates the cylinder 109 and the body portion 106 is provided. A control chamber 141 is formed between the partition wall 140 and the flange 137. The control room 141 is connected to the passage 160. The flange 137 receives the pressure of compressed air supplied to the control chamber 141. The flange 137 receives the pressure of the control chambers 139 and 141, and the flange 138 receives the pressure of the control chamber 139. The cylinder 109 is urged in the direction of the center line C1 by the pressure of the control chambers 139 and 141.

The structure of the trigger valve 105 and the push lever valve 104 will be described with reference to FIG. The push lever valve 104 includes a pressure chamber 180, a push lever valve chamber 143, a push lever plunger 144, a valve body 145, a valve member 146, and a biasing member 147. The valve body 145 has a cylindrical shape and accommodates the push lever plunger 144 so as to be movable. The biasing member 147 is a metal compression spring as an example, and the biasing member 147 biases the valve member 146.

A trigger 148 is attached to the main body 101 so as to be rotatable about a trigger shaft 149 within a predetermined angle range. A guide member 150 is attached to the main body 101. An elastic member (not shown) is provided, and the elastic member urges the trigger 148 clockwise about the trigger shaft 149. The trigger 148 is biased by the elastic member, contacts the guide member 150, and stops at the initial position in FIG.

The trigger valve 105 includes a cylindrical guide portion 151, a trigger valve chamber 152, a valve body storage chamber 153, a port 154, a ball-shaped valve member 155, and a trigger plunger 157. The guide part 151 is attached to the handle 107. The trigger valve chamber 152 and the valve body storage chamber 153 are provided in the guide portion 151. The port 154 is provided in the guide portion 151 and is formed between the valve body storage chamber 153 and the trigger valve chamber 152. The valve member 155 opens and closes the port 154. A shaft hole 156 is provided in the guide portion 151, and the trigger plunger 157 is movable in the shaft hole 156. The valve body storage chamber 153 is connected to the pressure accumulation chamber 110.

The guide part 151 guides the operation of the trigger plunger 157. A part of the trigger plunger 157 in the longitudinal direction is disposed on the outside D <b> 1 of the main body 101. The valve member 155 is pressed against the guide portion 151 by the pressure in the pressure accumulating chamber 110 and closes the port 154. The main body 101 has a passage 11, and the trigger valve chamber 152 is connected to the pressure chamber 180 through the passage 11.

In the trigger plunger 157, a flange 158 is provided at a position arranged on the outside D 1, and a seal member 159 is attached to the outer peripheral surface of the trigger plunger 157. The seal member 159 seals the shaft hole 156.

On the other hand, when the operator applies an operating force to the trigger 148 stopped at the initial position as shown in FIG. 4, the trigger 148 operates counterclockwise, and the trigger 148 is triggered trigger plunger as shown in FIG. 157 is pressed. For this reason, the trigger plunger 157 is pressed against the valve member 155, and the valve member 155 opens the port 154. The flange 158 pushes the seal member 159 into the shaft hole 156, and the seal member 159 seals the shaft hole 156. That is, the trigger valve 105 connects the pressure accumulation chamber 110 and the trigger valve chamber 152. For this reason, the compressed air in the pressure accumulating chamber 110 flows into the pressure chamber 180 via the port 154 and the trigger valve chamber 152.

The push lever valve 104 is provided between the cylinder 109 and the trigger valve 105 in the main body 101. The push lever plunger 144 and the valve member 146 are arranged concentrically around the center line E1. The center line E1 is parallel to the center line C1. The push lever plunger 144 and the valve member 146 are relatively movable in the direction of the center line E1 in FIG. 4 and can be brought into contact with and separated from each other.

The push lever valve chamber 143 is provided in the valve body 145. A port 181 is provided in the valve body 145, and the port 181 connects the pressure chamber 180 and the push lever valve chamber 143. The push lever valve chamber 143 is connected to the passage 142.

The valve body 145 has an exhaust passage 161 connected to the push lever valve chamber 143. When the seal member 162 is attached to the valve member 146 and the valve member 146 is activated and stopped, the seal member 162 opens and closes the port 181. The biasing member 147 biases the valve member 146 in a direction approaching the push lever plunger 144.

An outer cylinder member 163 is provided, and the outer cylinder member 163 is supported by the guide member 150. The outer cylinder member 163 is operable in the direction of the center line E1 with respect to the main body 101. A part of the valve body 145 is disposed in the outer cylinder member 163.

A flange 164 is provided at the end of the push lever plunger 144. An elastic member 165 is provided between the flange 164 and the valve body 145. The elastic member 165 is a metal compression spring as an example. The elastic member 165 biases the push lever plunger 144 in a direction away from the valve member 146 in the direction of the center line E1.

The push lever 134 has an arm 166, and the arm 166 and the outer cylinder member 163 are connected so that power can be transmitted. The valve body 145 is urged by the elastic force of the elastic member 165 and is pressed against the stepped portion 167 and stopped. The step portion 167 is provided in the main body 101.

The switching mechanism 10 is provided in the main body 101 as shown in FIG. As shown in FIG. 5, the switching mechanism 10 includes a first air chamber 12, a second air chamber 13, a third air chamber 22, a fourth air chamber 37, a first piston 14, a second piston 15, a third piston 16, It has a valve 17, a first cylinder part 18, a second cylinder part 19, a cylinder 20 and a valve 21. The first air chamber 12 is connected to the passage 11. The second air chamber 13 is connected to the pressure accumulation chamber 110 through a passage 23. The third air chamber 22 is connected to the passage 142.

The 2nd cylinder part 19, the 1st cylinder part 18, and the cylinder 20 are arrange | positioned concentrically centering | focusing on centerline A3. The second cylinder part 19 is disposed in the first cylinder part 18. The first piston 14 is movable in the direction of the center line A3 in the second cylinder part 19 and the first cylinder part 18. A stopper 24 that protrudes inward from the inner peripheral surface of the second cylindrical portion 19 is provided. The stopper 24 is annular and forms a passage 25. The first piston 14 is disposed between the first air chamber 12 and the stopper 24.

A valve 17 is disposed between the first piston 14 and the stopper 24 in the second cylinder portion 19. The valve 17 is movable in the direction of the center line A3. As shown in FIG. 6, the valve 17 includes a passage 26 penetrating in the direction of the center line A <b> 3 and a notch 27 formed on the outer peripheral surface. The passage 26 and the notch 27 are arranged in parallel to each other. The opening area of the passage 26 is narrower than the opening area of the notch 27 in a plan view perpendicular to the center line A3. The opening areas of the passages 26 and 27 are oil distribution areas and are areas in a plane perpendicular to the center line A3.

A spring 28 is provided between the first piston 14 and the valve 17 in the second cylinder portion 19. The spring 28 is, for example, a metal compression spring. The spring 28 urges the first piston 14 and the valve 17 along the center line A3 in directions away from each other. The main body 101 has an inner wall 49, and the first piston 14 urged by the urging force of the spring 28 contacts the inner wall 49 and stops. A seal member 32 is provided on the outer peripheral surface of the first piston 14, and the seal member 32 contacts the inner peripheral surface of the second cylindrical portion 19.

A spring 33 is provided in the first air chamber 12. The spring 33 is a metal compression spring as an example, and the spring 33 urges the first piston 14 in a direction approaching the stopper 24. The first piston 14 is oriented to approach the stopper 24 with the pressure of the first air chamber 12.

A flange 29 protruding from the inner peripheral surface of the first cylinder portion 18 is provided. The flange 29 has a passage 36, and a seal member 30 is attached to the inner peripheral end of the flange 29. A fourth air chamber 37 is formed between the second piston 15 and the flange 29 in the second cylindrical portion 19. The fourth air chamber 37 is connected to the third air chamber 22 via the passage 36.

The second piston 15 is disposed between the flange 29 and the stopper 24 in the second cylindrical portion 19. The second piston 15 is movable in the direction of the center line A3, and the seal member 31 is attached to the outer peripheral surface of the second piston 15. The seal member 31 is in contact with the inner peripheral surface of the second cylindrical portion 19.

In the second cylinder portion 19, a first oil chamber 34 is formed between the first piston 14 and the valve 17. In the second cylinder portion 19, a second oil chamber 35 is formed between the second piston 15 and the valve 17. The first oil chamber 34 and the second oil chamber 35 are always connected via the passage 26. The inner end of the notch 27 is disposed outside the inner peripheral end of the stopper 24. When the valve 17 is in contact with the stopper 24, the stopper 24 closes the notch 27. When the valve 17 is separated from the stopper 24, the first oil chamber 34 and the second oil chamber 35 are connected via the notch 27. Oil is accommodated across the first oil chamber 34, the second oil chamber 35, the passage 26 and the notch 27.

Oil is an example of a suitable material that can be regarded as an incompressible fluid, and the amount compressed or expanded by pressure change and temperature change is significantly smaller than a gas such as compressed air. In addition, when the pressure change and temperature change occur, the oil has a substantially constant volume, that is, an amount of change that is negligible for practical use. Moreover, the viscosity of oil is usually higher than the viscosity of compressed air. As the oil, for example, hydraulic working oil, silicone oil, or the like can be used. The hydraulic fluid includes petroleum-based hydraulic fluid, flame retardant hydraulic fluid, and the like. In addition, the operation time of the first piston 14 and the second piston 15 can be controlled by selecting the viscosity of the oil, that is, selecting the oil whose viscosity resistance is a desired value. The viscous resistance when oil flows through the passage and space is larger than the viscous resistance when compressed air flows through the passage and space. The area of the passage 25 is smaller than the area of the first oil chamber 34. The valve 17 is biased in a direction approaching the stopper 24 by the pressure of the first oil chamber 34, and the valve 17 is biased in a direction away from the stopper 24 by the pressure of the second oil chamber 35.

A partition wall 38 is provided in the cylinder 20. The partition wall 38 is disposed between the second air chamber 13 and the third air chamber 22 in the direction of the center line A3. The partition wall 38 does not move in the direction of the center line A3. The partition wall 38 has a passage 40 and a shaft hole 41. The partition wall 38 has a passage 42, and the passage 42 is connected to the passage 40. The cylinder 20 has a passage 43, and the passage 43 connects the passage 42 and the passage 160 as shown in FIG. 4.

As shown in FIG. 5, a seal member 44 is attached to the inner peripheral surface of the shaft hole 41. The third piston 16 is disposed across the passage 36, the third air chamber 22, the passage 40, and the shaft hole 41. The seal member 44 contacts the outer peripheral surface of the third piston 16. The end of the third piston 16 and the end of the second piston 15 are in contact with each other. The third piston 16 has a disc portion 45, and a seal member 46 is attached to the outer peripheral surface of the disc portion 45. Since the disc part 45 receives the pressure of the 2nd air chamber 13, the 3rd piston 16 is urged | biased by the direction which approaches the stopper 24 in centerline A3 direction. On the outer peripheral surface of the third piston 16, a seal member 47 is attached between the partition wall 38 and the flange 29 in the direction of the center line A3.

As shown in FIGS. 1 and 3, a magazine 169 that accommodates the nail 168 is attached to the injection unit 102. Each time the driver blade 122 drives one nail 168, the next one nail 168 is sent from the magazine 169 to the injection path 133.

An example of using the driving machine 100 will be described. FIG. 4 shows a state where the operating force is released with respect to the trigger 148 and the push lever 134 is separated from the counterpart material 170, that is, the initial state of the driving machine 100. The trigger 148 is stopped at the initial position. When the trigger 148 is stopped at the initial position, the trigger valve 105 closes the port 154. For this reason, the compressed air in the pressure accumulating chamber 110 does not flow into the passage 11.

When the trigger valve 105 closes the port 154, the first air chamber 12, the pressure chamber 180, and the trigger valve chamber 152 are connected to the outside D1 through the shaft hole 156. That is, the compressed air in the pressure accumulation chamber 110 is not supplied to the first air chamber 12.

When the push lever 134 is separated from the counterpart material 170, the push lever plunger 144 stops at the initial position. When the push lever plunger 144 is stopped at the initial position, the seal member 162 blocks the pressure chamber 180 and the push lever valve chamber 143 from each other. The push lever plunger 144 is open to the exhaust passage 161, and the push lever valve chamber 143 is connected to the outside D 1 of the main body 101 through the exhaust passage 161.

When the trigger valve 105 and the push lever valve 104 are in the initial state, the switching mechanism 10 is in the initial state. An initial state of the switching mechanism 10 will be described with reference to FIG. Since compressed air is not supplied to the first air chamber 12, the first piston 14 biased by the spring 28 contacts the inner wall 49 and stops at the initial position. The compressed air in the pressure accumulating chamber 110 flows into the second air chamber 13 through the passage 23.

The urging force applied from the second air chamber 13 to the third piston 16 is transmitted to the second piston 15. The second piston 15 is stopped at the initial position in contact with the stopper 24. When the second piston 15 is stopped at the initial position, the seal member 30 is separated from the second piston 15 and the passage 36 is open. The fourth air chamber 37 is connected to the third air chamber 22 via the passage 36. Further, the seal member 47 is separated from the partition wall 38 and the passage 40 is open. For this reason, the control chamber 141 is connected to the third air chamber 22 via the passage 160, the passage 43, and the passage 40. The third air chamber 22 is connected to the outside D1 through the passage 142 and the exhaust passage 161. That is, the fourth air chamber 37 and the control chamber 141 are at atmospheric pressure. Further, the valve 17 biased by the spring 28 comes into contact with the stopper 24 and stops at the initial position.

When the control chamber 141 is connected to the outside D1, as shown in FIG. 2, the cylinder 109 is pressed against the valve seat 119 by the pressure of the control chamber 139 and the urging force of the elastic member 130, and the port 171 is closed. Yes. Therefore, the compressed air in the pressure accumulating chamber 110 is not supplied to the piston upper chamber 120, and the striking portion 103 is stopped at the top dead center.

Further, the exhaust valve chamber 114 is connected to the outside D1 of the main body 101 via a passage 160, a passage 142, a push lever valve chamber 143, and an exhaust passage 161. Therefore, the exhaust valve 118 opens the port 117, and the piston upper chamber 120 is connected to the external D 1 via the port 117 and the passages 116 and 112.

The operator can use the driving machine 100 by selecting the first mode or the second mode. In the first mode, an operating force is applied to the trigger 148 after the push lever 134 is pressed against the counterpart material 170. In the second mode, after an operating force is applied to the trigger 148, the push lever 134 is pressed against the counterpart material 170. For convenience, an example in which the operator selects the second mode will be described.

(Example in which the second mode is selected) When the operator applies an operating force to the trigger 148, the trigger plunger 157 is operated from the initial position by the operating force of the trigger 148 as shown in FIG. When the trigger plunger 157 is actuated, the trigger plunger 157 pushes the valve member 155, and the pressure accumulation chamber 110 and the trigger valve chamber 152 are connected. For this reason, the compressed air in the pressure accumulating chamber 110 is supplied to the first air chamber 12 via the passage 11.

When compressed air is supplied to the first air chamber 12, the first piston 14 moves in a direction approaching the stopper 24 from the initial position. When the first piston 14 moves toward the stopper 24, the pressure in the first oil chamber 34 increases, and the oil in the first oil chamber 34 flows into the second oil chamber 35 via the passage 26. As described above, the pressure in the second oil chamber 35 increases from the time when the operating force is applied to the trigger 148. When the pressure in the second oil chamber 35 increases, the second piston 15 stopped at the initial position moves in a direction away from the stopper 24. The operating force of the second piston 15 is transmitted to the third piston 16, and the third piston 16 operates in a direction away from the stopper 24.

After the operating force is applied to the trigger 148, when the push lever 134 is pressed against the counterpart material 170, the operating force of the push lever 134 is transmitted to the push lever plunger 144. The push lever plunger 144 operated from the initial position closes the exhaust passage 161 as shown in FIG. Further, the valve member 146 is operated from the initial position by the operating force of the push lever plunger 144, and the port 181 is opened.

For this reason, a part of the compressed air in the passage 11 is supplied to the push lever valve chamber 143, the passage 142, and the third air chamber 22. When the elapsed time from when the operating force is applied to the trigger 148 and the compressed air is supplied to the first air chamber 12 until the push lever 134 is pressed against the mating member 170 is within a predetermined time, the seal member 47 is separated from the partition wall 38. That is, the passage 40 is open. An example of the predetermined time is about 3 seconds. For this reason, the compressed air in the third air chamber 22 is supplied to the passage 160 via the passage 40. A part of the compressed air in the passage 160 is supplied to the exhaust valve chamber 114 via the passage 113. The exhaust valve 118 closes the port 117. A part of the compressed air in the passage 160 is supplied to the control chamber 141.

Then, the cylinder 109 is separated from the valve seat 119 by the pressure in the control chambers 139 and 141, and the port 171 is opened. For this reason, the compressed air in the pressure accumulation chamber 110 is sent to the piston upper chamber 120. The striking portion 103 operates in a direction away from the valve seat 119, and the driver blade 122 strikes the nail 168 in the injection path 133, and the nail 168 is driven into the counterpart material 170.

When the hitting portion 103 operates from the top dead center toward the bottom dead center and the piston 121 is positioned between the passage 125 and the valve seat 119 in the direction of the center line C1, the check valve 127 opens the passage 125, The compressed air in the piston lower chamber 123 returns to the return air chamber 124 from the passage 125. When the piston 121 collides with the bumper 128, the bumper 128 absorbs the kinetic energy of the hitting portion 103.

As described above, when the push lever 134 is pressed against the mating member 170 and the compressed air in the pressure accumulating chamber 110 flows into the third air chamber 22, a part of the compressed air in the third air chamber 22 It flows into the fourth air chamber 37 via 36. Then, the 2nd piston 15 moves in the direction which approaches the stopper 24 with the pressure of the 4th air chamber 37, and the pressure of the 2nd oil chamber 35 rises.

The valve 17 is separated from the stopper 24 by the pressure of the second oil chamber 35, and the oil in the second oil chamber 35 flows into the first oil chamber 34 mainly through the notch 27, and the pressure in the first oil chamber 34 is reduced. To rise. Then, the first piston 14 operates in a direction away from the stopper 24 due to the pressure of the first oil chamber 34, and the first piston 14 contacts the inner wall 49 and stops at the initial position.

Thereafter, when the operator maintains the state where the operation force is applied to the trigger 148, and the operation of pressing the push lever 134 against the counterpart material 170 and the operation of releasing the push lever 134 from the counterpart material 170 are alternately repeated, The hitting unit 103 reciprocates between the top dead center and the bottom dead center, and the hitting unit 103 sequentially hits a plurality of nails 168 one by one.

On the other hand, when an operating force is applied to the trigger 148 and the push lever 134 is not pressed against the mating member 170 within a predetermined time from when compressed air is supplied to the first air chamber 12, as shown in FIG. The seal member 47 contacts the partition wall 38. That is, the passage 40 is closed. Further, the seal member 30 contacts the outer peripheral surface of the second piston 15 and the passage 36 is closed. Further, the second piston 15 stops at the operating position in contact with the flange 29. For this reason, after an operating force is applied to the trigger 148 and a predetermined time has elapsed from when compressed air is supplied to the first air chamber 12, the push lever 134 is pressed against the mating member 170 to open the port 181. Even if the compressed air flows into the third air chamber 22 from the passage 11, the compressed air in the third air chamber 22 is not supplied to the control chamber 141.

That is, the striking portion 103 stops at the top dead center, and the striking portion 103 does not operate in the direction of striking the nail 168. In this way, the switching mechanism 10 allows the hitting portion 103 to move up when the push lever 134 is pressed against the mating member 170 after the elapsed time from when the operating force is applied to the trigger 148 exceeds a predetermined time. Stop working from the dead center.

As shown in FIG. 11, when the operating force on the trigger 148 is released, the pressure accumulation chamber 110 and the trigger valve chamber 152 are shut off, and the first air chamber 12 is connected to the external D1 via the passage 11 and the shaft hole 156. Connected to. For this reason, the compressed air in the first air chamber 12 is discharged to the outside D1. When the push lever 134 is separated from the mating member 170, the exhaust passage 161 is opened, and the compressed air in the third air chamber 22 is discharged from the exhaust passage 161 to the outside.

Further, the pressure in the second air chamber 13 operates to move the third piston 16 closer to the stopper 24, the seal member 47 is separated from the partition wall 38, and the passage 40 is opened. Furthermore, the second piston 15 approaches the stopper 24 by the operating force of the third piston 16, and the pressure in the second oil chamber 35 increases. When the pressure in the second oil chamber 35 rises, the valve 17 moves away from the stopper 24, and the oil in the second oil chamber 35 flows into the first oil chamber 34 mainly through the notch 37. The pressure in the first oil chamber 34 increases, the second piston 15 operates in a direction away from the stopper 24, and the second piston 15 contacts the inner wall 49 and stops at the initial position.

As described above, when the operator selects the second mode and uses the driving machine 100, when the operating time is applied to the trigger 148 and a predetermined time is exceeded, the switching mechanism 10 causes the compressed air to flow into the control chamber. The passage 40 to be sent to 141 is closed. Therefore, when the push lever 134 comes into contact with an object other than the counterpart material 170 into which the nail 168 is driven, the hitting portion 103 can be prevented from operating in the direction in which the nail 168 is hit.

Further, the second piston 15 is actuated by the pressure of oil flowing from the first oil chamber 34 into the second oil chamber 35 to close the passage 40. Since oil can be regarded as an incompressible fluid and is held in a sealed region, it is possible to suppress an increase in the amount of compressed air supplied to the pressure accumulating chamber 110. Further, the oil can be selected so that the viscosity is within a desired range in a temperature range where the driving machine 100 is normally used, for example, 0 ° C. to 40 ° C. For this reason, the switching mechanism 10 suppresses a change in the speed at which the first piston 14 and the second piston 15 are moved away from the stopper 24 due to pressure or temperature, compared to a switching mechanism using compressed air. Is possible. Therefore, it is possible to realize the switching mechanism 10 that can suppress a change in the required time from when the operating force is applied to the trigger 148 until the passage 40 is closed. That is, the switching mechanism 10 is significantly more stable in operation than the switching mechanism that uses compressed air.

Further, the opening area of the notch 37 is larger than the opening area of the passage 26 in a plan view perpendicular to the center line A3. Then, the time required for the oil in the second oil chamber 35 to flow into the first oil chamber 34 is shorter than the time required for the oil in the first oil chamber 34 to flow into the second oil chamber 35.

For this reason, as shown in FIG. 9, when the operating force for the trigger 148 is applied and the second piston 15 is stopped at the operating position, the operating force for the trigger 148 is released as shown in FIG. When the second piston 15 returns from the operating position to the initial position, the time required for the second piston 15 to return from the operating position to the initial position is the time required for the second piston 15 to return from the initial position to the operating position. Than can be shortened. Therefore, the response when the second piston 15 returns from the operating position to the initial position can be improved.

The first oil chamber 34 and the second oil chamber 35 are hermetically sealed, and the passage 26 and the notch 27 that define a predetermined time required from when the trigger 148 is operated until the passage 40 is shut off are disposed in the sealed space. Is done. The passage 26 and the notch 27 have very small openings depending on the incompressible fluid to be selected. However, when the passages 26 and the notches 27 are arranged in the sealed space, foreign matter enters the opening from the outside and the foreign matter remains. In addition, the operation accuracy of the switching mechanism 10 is stabilized. Foreign materials include dust and debris.

(Example in which the first mode is selected) When the push lever 134 is pressed against the mating member 170, the valve member 146 operates from the initial position, and the port 181 opens. Thereafter, when an operating force is applied to the trigger 148, the pressure accumulation chamber 110 and the passage 11 are connected. A part of the compressed air in the passage 11 is supplied to the first air chamber 12, and a part of the compressed air in the passage 11 is supplied to the fourth air chamber 37 via the third air chamber 22. The first piston 14 is biased toward the stopper 24 by the pressure of the first air chamber 12. Further, the second piston 15 is biased toward the stopper 24 by the pressure of the fourth air chamber 37 and stops at an initial position in contact with the stopper 24. For this reason, the first piston 14 is held in a state stopped at the initial position, and the oil in the first oil chamber 34 does not flow into the second oil chamber 35.

The third piston 16 is stopped at the initial position, and the passage 40 is open. For this reason, a part of the compressed air supplied to the third air chamber 22 is supplied to the control chamber 141 and the exhaust valve chamber 114 via the passage 43 and the passage 160. Accordingly, as in the case where the second mode is selected, the hitting unit 103 operates from the top dead center toward the bottom dead center.

(Embodiment 2) Embodiment 2 of the driving machine 100 is shown in FIGS. The switching mechanism 10 is divided into a first section 10A and a second section 10B. The first section 10A is mainly provided in the body portion 106, and the second section 10B is mainly provided in the head cover 108. The first section 10 </ b> A includes a first air chamber 12, springs 28 and 33, a first piston 14, a valve 17, a third cylinder portion 19 </ b> A, and a first oil chamber 34. The first piston 14, the spring 28, the valve 17, and the first oil chamber 34 are disposed in the third cylinder portion 19A. The third cylinder portion 19A has a stopper 24A. The first piston 14 and the valve 17 are movable in the direction of the center line A4 of the third cylinder portion 19A. The first piston 14 is biased in a direction approaching the stopper 24 </ b> A by the biasing force of the spring 33. The valve 17 is biased in a direction approaching the stopper 24 </ b> A by the biasing force of the spring 28. The position where the valve 17 comes into contact with the stopper 24 </ b> A and stops is the initial position of the valve 17. The position where the valve 17 is separated from the stopper 24 </ b> A is the operating position of the valve 17.

The second section 10B includes a second piston 15, a third piston 16, a first cylinder portion 18, a second cylinder portion 19, a second air chamber 13, a third air chamber 22, a fourth air chamber 37, and a second oil chamber. 35. The head cover 108 has an opening 520 connected to the second oil chamber 35, and the plug 521 closes the opening 520.

The passage 142 is provided over the body portion 106 and the head cover 108. The passage 160 is provided in the head cover 108. Other configurations of the driving machine 100 shown in FIGS. 12 and 13 are the same as the configurations of the driving machine 100 shown in FIGS. 1, 2, and 3.

The switching mechanism 10 shown in FIGS. 12 and 13 operates in the same manner as the switching mechanism 10 shown in FIGS. 5, 7, 8, 9, 10, and 11 and can obtain the same effects. . The switching mechanism 10 is divided into a first section 10A and a second section 10B. The first section 10 </ b> A is disposed in the body portion 106, and the second section 10 </ b> B is disposed in the head cover 108. Therefore, it is possible to suppress an increase in size of the body portion 106, specifically, an increase in size in a direction in which the handle 107 protrudes with respect to the body portion 106.

FIG. 14 shows another arrangement example of the switching mechanism 10. Both the first section 10 </ b> A and the second section 10 </ b> B are provided in the head cover 108. The other configuration of the driving machine 100 shown in FIG. 14 is the same as the configuration of the driving machine 100 shown in FIGS. 1, 2, and 3.

The switching mechanism 10 shown in FIG. 14 operates in the same manner as the switching mechanism 10 shown in FIGS. 5, 7, 8, 9, 10, and 11, and can obtain the same effects. In the switching mechanism 10 shown in FIG. 14, the first section 10 </ b> A and the second section 10 </ b> B are both arranged in the head cover 108. Therefore, it is possible to suppress an increase in size of the body portion 106, specifically, an increase in size in a direction in which the handle 107 protrudes with respect to the body portion 106.

(Embodiment 3) Another example of the switching mechanism 10 provided in the driving machine 100 of FIG. 1 will be described with reference to FIG. A holding hole 182 is provided at a connection portion between the body portion 106 and the handle 107. The holding hole 182 has a cylindrical shape and opens to the outside D1. The switching mechanism 10 does not include the first cylinder portion 18, and the second cylinder portion 19 is disposed in the holding hole 182. The partition wall 38 has a cylindrical portion 183, and the cylindrical portion 183 is disposed in the holding hole 182. The second cylinder portion 19 and the partition wall 38 are arranged side by side in the direction of the center line A3.

The opening of the cylinder part 183 is closed with a plug 184, and the second air chamber 13 is formed in the cylinder part 183. The plug 184 is provided with a hole 185, the cylinder part 183 is provided with a hole 187, and the body part 106 is provided with a hole 186. The pin 188 is inserted into the holes 186, 187, 185, and the switching mechanism 10 is fixed to the body portion 106.

When the switching mechanism 10 shown in FIG. 15 is provided in the driving machine 100 shown in FIGS. 1 and 2, it is possible to obtain the same effect as that of the first embodiment of the driving machine 100. Further, in the assembly process of the driving machine 100 shown in FIG. 15, the switching mechanism 10 is inserted into the holding hole 182 as one unit. Next, the pin 188 is inserted into the holes 186, 187, 185, and the switching mechanism 10 is fixed to the trunk portion 106.

For this reason, in the assembly process of the driving machine 100, it is possible to insert the component 189 shown in FIG. 16 into the holding hole 182 and fix the component 189 to the trunk portion 106 instead of the switching mechanism 10. The component 189 includes a cylindrical portion 190 and a disc portion 191 whose end portion in the direction of the center line A5 of the cylindrical portion 190 is closed. The outer surface of the component 189 is in close contact with the inner surface of the holding hole 182. A groove 193 is formed on the outer surface of the cylindrical portion 190 along the circumferential direction. The groove 193 always connects the passage 142 and the passage 160. That is, the passage 142 and the passage 160 are not blocked. The disc part 192 separates the holding hole 182 and the first air chamber 12. A hole 194 that penetrates the cylindrical portion 190 in the radial direction is provided. A pin 188 is inserted into the holes 186 and 194, and the component 189 is fixed to the body portion 106.

The driving machine 100 having the component 189 shown in FIG. 16 can be used even when the elapsed time from when the operator selects the second mode and the operating force is applied to the trigger 148 exceeds a predetermined time. 142 and the passage 160 are connected. For this reason, when the elapsed time from when the operating force is applied to the trigger 148 exceeds a predetermined time and the push lever 134 contacts the mating member 170, the compressed air in the pressure accumulating chamber 110 passes through the passages 142 and 160. To the control chamber 141 and to the exhaust valve chamber 114. Therefore, the hitting unit 103 operates from the top dead center toward the bottom dead center. If the holding hole 182 is provided in the body portion 106, either the switching mechanism 10 or the component 189 as a unit is attached to the holding hole 182 in the assembly process of the driving machine 100, and the driving machine 100 can be assembled.

(Embodiment 4) Embodiment 4 of the driving machine will be described with reference to FIGS. 17, 18 and 19. FIG. The driving machine 310 includes a main body 311, a cylinder 312, a hitting unit 313, a trigger 314, an injection unit 315, and a push lever 316. Further, a magazine 317 attached to the driving machine 310 is provided. The main body 311 includes a cylindrical body 318, a head cover 321 fixed to the body 318, and a handle 319 connected to the body 318. The handle 319 protrudes from the outer surface of the body 318.

A pressure accumulating chamber 320 is formed over the inside of the handle 319, the inside of the body portion 318, and the inside of the head cover 321. An air hose is connected to the handle 319. Compressed air as a compressible gas is supplied into the pressure accumulation chamber 320 via an air hose. The cylinder 312 is provided in the body portion 318. The head cover 321 includes an outer cylinder part 322, an inner cylinder part 323, and an exhaust passage 324. The outer cylinder part 322 and the inner cylinder part 323 are arranged concentrically around the center line A6. The inner cylinder part 323 is provided inside the outer cylinder part 322.

A head valve 331 is provided in the head cover 321. The head valve 331 has a cylindrical shape and is disposed between the outer cylinder portion 322 and the inner cylinder portion 323. The head valve 331 is movable in the direction of the center line A6 of the cylinder 312. Seal members 325 and 326 are attached to the head valve 331. A control chamber 327 is formed between the outer cylinder part 322 and the inner cylinder part 323. Seal members 325 and 326 hermetically seal the control chamber 327. A biasing member 328 is provided in the control chamber 327. The biasing member 328 is, for example, a metal compression coil spring. Compressed air is supplied to the control chamber 327 and the compressed air is discharged from the control chamber 327.

A stopper 329 is provided in the head cover 321. The stopper 329 is made of synthetic rubber as an example, and a part of the stopper 329 is disposed inside the inner cylinder portion 323. A passage 330 is formed between the inner cylinder portion 323 and the stopper 329, and the passage 330 is connected to the exhaust passage 324. The exhaust passage 324 is connected to the outside D <b> 2 of the main body 311.

The cylinder 312 is positioned and fixed with respect to the body 318 in the direction of the center line A6. In the cylinder 312, a valve seat 332 is attached to the end of the portion closest to the head valve 331 in the center line A6 direction. The valve seat 332 is annular and made of synthetic rubber. A port 333 is formed between the head valve 331 and the valve seat 332.

The head valve 331 is urged in a direction approaching the valve seat 332 by the pressure of the control chamber 327 and the urging force of the urging member 328. The head valve 331 is biased in a direction away from the valve seat 332 by the pressure of the pressure accumulating chamber 320. When the head valve 331 is pressed against the valve seat 332, the head valve 331 closes the port 333. When the head valve 331 moves away from the valve seat 332, the head valve 331 opens the port 333.

The striking part 313 includes a piston 334 and a driver blade 335 fixed to the piston 334. The piston 334 is disposed in the cylinder 312 and the piston 334 is movable in the direction of the center line A6. A seal member 399 is attached to the outer peripheral surface of the piston 334. A piston upper chamber 336 is formed between the stopper 329 and the piston 334. When the head valve 331 opens the port 333, the pressure accumulation chamber 320 is connected to the piston upper chamber 336. When the head valve 331 closes the port 333, the pressure accumulation chamber 320 is blocked from the piston upper chamber 336.

The injection part 315 is fixed to the body part 318 at the end opposite to the part where the head cover 321 is provided in the direction of the center line A6.

As shown in FIG. 19, a bumper 337 is provided in the cylinder 312. The bumper 337 is disposed in the cylinder 312 at a position closest to the injection portion 315 in the direction of the center line A6. The bumper 337 is made of synthetic rubber or silicon rubber. The bumper 337 has a shaft hole 338, and the driver blade 335 can move in the direction of the center line A6 in the shaft hole 338. A piston lower chamber 339 is formed between the piston 334 and the bumper 337 in the cylinder 312. The seal member 399 hermetically blocks the piston lower chamber 339 and the piston upper chamber 336.

A holder 340 is provided in the body 318. The holder 340 has a cylindrical shape. The cylinder 312 is disposed in the holder 340. Passages 341 and 342 penetrating the cylinder 312 in the radial direction are provided. The passage 342 is disposed between the passage 341 and the injection portion 315 in the direction of the center line A6. A return air chamber 343 is formed between the outer surface of the cylinder 312 and the body portion 318. The passage 341 connects the piston lower chamber 339 and the return air chamber 343.

A check valve 344 is provided in the cylinder 312. The check valve 344 opens the passage 341 when the air in the piston lower chamber 339 attempts to flow into the return air chamber 343. The check valve 344 closes the passage 341 when the air in the return air chamber 343 tries to flow into the piston lower chamber 339. The passage 342 always connects the return air chamber 343 and the piston lower chamber 339.

Compressed air is sealed over the piston lower chamber 339 and the return air chamber 343. A seal member 345 is provided between the holder 340 and the body 318, and a seal member 346 is provided between the holder 340 and the cylinder 312. The seal members 345 and 346 hermetically block the pressure accumulation chamber 320 and the return air chamber 343.

As shown in FIG. 20A, the trigger 314 is attached to the main body 311. The trigger 314 is rotatable with respect to the main body 311 within a predetermined angle range around the support shaft 347. An urging member 314A is provided, and the urging member 314A urges the trigger 314 clockwise in FIG. The main body 311 has a holder 348 that regulates the operating range of the trigger 314. An arm 349 is attached to the trigger 314. The arm 349 can be operated around the support shaft 350 with respect to the trigger 314. A biasing member 349A is provided, and the biasing member 349A biases the arm 349 counterclockwise in FIG. The urging members 348A and 349A are metal springs as an example.

A trigger valve 351 is provided at a connection point between the body 318 and the handle 319. The trigger valve 351 includes a pressure chamber 506, a plunger 352, a plunger 501, a first body 353, a second body 354, a third body 500, a valve body 355, an urging member 369, and an exhaust passage 360. The first body 353 and the second body 354 are both cylindrical, and the first body 353 and the second body 354 are both arranged concentrically around the center line A7.

As shown in FIG. 20B, the first body 353 and the second body 354 are provided so as not to move with respect to the main body 311. The first body 353 has a shaft hole 502. The second body 354 has a shaft hole 354A. The valve body 355 is disposed over the first body 353 and the second body 354. The valve body 355 is movable in the direction of the center line A7. A passage 356 is formed in the first body 353, and the passage 356 is connected to the control chamber 327 through the passage 357.

Further, a passage 358 that penetrates the first body 353 in the radial direction is provided. A passage 23 is provided in the body portion 318, and the passage 23 is connected to the pressure accumulating chamber 320 through the passage 358. Further, an exhaust passage 360 is provided across the first body 353 and the handle 319. The exhaust passage 360 connects the inside of the first body 353 and the outside D1. The valve body 355 has a shaft hole 365. Seal members 362, 362, 363 are attached to the outer peripheral surface of the valve body 355. When the valve body 355 operates and stops in the direction of the center line A7, the seal member 361 connects or disconnects the passage 358 and the exhaust passage 360. A space 364 is formed between the valve body 355 and the second body 354. The space 364 is connected to the shaft hole 354A. The seal member 363 always seals the space 364.

A seal member 503 is attached to the shaft hole 502. The plunger 352 is disposed across the shaft hole 502, the shaft hole 365, the shaft hole 354A, and the outside D1. Seal members 366 and 367 are attached to the outer peripheral surface of the plunger 352. When the plunger 352 operates in the direction of the center line A7 and stops, the seal member 366 connects or blocks the passage 358 and the space 364. When the plunger 352 operates in the direction of the center line A7 and stops, the seal member 367 connects or blocks the space 364 and the external D1. The biasing member 369 biases the plunger 252 so as to approach the arm 349. The seal member 503 is in contact with the outer peripheral surface of the plunger 352, and the seal member 503 always seals the shaft hole 502.

The pressure chamber 506 is connected to the pressure accumulation chamber 320. The third body 500 has a cylindrical shape, and the plunger 501 is disposed over the pressure chamber 506 and the third body 500. The plunger 501 and the plunger 352 are arranged concentrically around the center line A7. An urging member 507 is provided in the pressure chamber 506. The plunger 501 is movable in the direction of the center line A7. The urging member 507 is a metal compression spring as an example, and the urging member 507 urges the plunger 501 in the direction of the center line A7 so as to approach the plunger 352. The end of the plunger 501 and the end of the plunger 252 are in contact. Seal members 508, 509, and 510 are attached to the outer peripheral surface of the plunger 501. A passage 511 penetrating the third body 500 in the radial direction is provided. The body portion 318 includes a passage 512 and an exhaust passage 513, and the passage 512 is connected to the passage 511.

When the plunger 501 operates in the direction of the center line A7 and stops, the seal member 508 connects or blocks the pressure chamber 506 and the passage 511. When the plunger 501 operates in the direction of the center line A7 and stops, the seal member 509 connects or blocks the pressure chamber 506 and the passage 511. When the plunger 501 operates in the direction of the center line A7 and stops, the seal member 510 is connected to or disconnected from the passage 511 and the exhaust passage 513. The exhaust passage 513 is connected to the outside D1.

The switching mechanism 10 is provided in the trunk | drum 318 in FIG. Of the switching mechanism 10 illustrated in FIG. 20A, the same elements and shapes as those of the switching mechanism 10 illustrated in FIG. 5 are denoted by the same reference numerals as those in FIG. 5. The body portion 318 has a holding hole 182, and the first cylinder portion 18 is disposed in the holding hole 182. The third piston 16, the second air chamber 13, the third air chamber 22, and the cylinder 20 are not provided. The passage 23 is connected to the fourth air chamber 37. The third piston 16 is biased in a direction approaching the stopper 24 by the pressure of the fourth air chamber 37. The first air chamber 12 is connected to the passage 512.

A shaft hole 514 is provided in the first cylindrical portion 18, and a part of the second piston 15 is disposed on the outside D <b> 1 through the shaft hole 514. A lever 516 is attached to the main body 311 via a support shaft 515. The lever 516 can be operated with the support shaft 515 as a fulcrum. A torsion spring 517 is attached to the support shaft 515. Torsion spring 517 biases lever 516 clockwise in FIG. 20A. The first end of the lever 516 is located in the operating region of the second piston 15. When the second piston 15 operates in the direction of the center line A3, the second piston 15 contacts or separates from the lever 516. When the second piston 15 contacts the lever 516, the lever 516 is operated counterclockwise by the operating force of the second piston 15.

A stopper 518 is provided on the main body 311, and the holder 348 supports the stopper 519. When the second piston 15 is separated from the lever 516, the lever 516 biased by the torsion spring 517 contacts the stopper 519 and stops at the initial position. Further, the transmission member 375 is provided with an engaging portion 375A. The engaging portion 375A reciprocates together with the transmission member 375. When the lever 516 is operated, a part of the operation region of the lever 516 overlaps with a part of the operation region of the engaging portion 375A.

Next, an example in which the nail 373 is driven into the mating member 377 using the driving machine 310 will be described. First, when the operating force with respect to the trigger 314 is released and the push lever 316 is separated from the mating member 377, the trigger valve 351 and the switching mechanism 10 are in the state shown in FIG. 20A. The tip of the arm 349 is in contact with the support shaft 347, and the arm 349 is stopped at the initial position. The operating force is not transmitted from the arm 349 to the plunger 352, and the plunger 352 and the plunger 501 are stopped at the initial position. When the plunger 501 is stopped at the initial position, the pressure chamber 506 and the passage 511 are blocked, and the passage 511 and the exhaust passage 513 are connected. Therefore, the first air chamber 12 is connected to the external D1 via the exhaust passage 513, and the first piston 14 is stopped at the initial position. Further, the compressed air in the pressure accumulating chamber 320 is supplied to the fourth air chamber 37 via the passage 358 and the passage 23. The second piston 15 comes into contact with the stopper 24 and stops at the initial position, and the second piston 15 is separated from the lever 516. The lever 516 stops at the initial position, and the tip of the lever 516 is located outside the operating region of the engaging portion 375A.

On the other hand, when the plunger 352 is stopped at the initial position, the passage 358 and the space 364 are connected, and the space 364 and the external D1 are blocked. Therefore, the valve body 355 is urged by the pressure of the space 364 and the urging force of the urging member 369, the seal member 362 is pressed against the first body 353, and the valve body 355 is stopped at the initial position. When the valve body 355 is stopped at the initial position, the passage 358 and the passage 356 are connected, and the passage 356 and the exhaust passage 360 are blocked. For this reason, the compressed air in the pressure accumulating chamber 320 is supplied to the control chamber 327. The head valve 331 closes the port 333, and the striking part 313 stops at the top dead center.

The operator can use the driving machine 300 by selecting the first mode or the second mode. In the first mode, an operating force is applied to the trigger 314 after the push lever 316 is pressed against the mating member 377. In the second mode, after an operating force is applied to the trigger 314, the push lever 316 is pressed against the counterpart material 170.

(Example in which the second mode is selected) For convenience, an example in which the operator selects the second mode will be described. When an operating force is applied to the trigger 314, the trigger 314 operates counterclockwise and stops at the operating position shown in FIG. The operation of the trigger 314 causes the arm 349 to operate with the support shaft 347 as a fulcrum, and the operating force of the arm 349 is transmitted to the plunger 352. The plunger 352 moves from the initial position to the intermediate position and stops. When the plunger 352 operates from the initial position, the plunger 501 operates from the initial position by the operating force of the plunger 352, and the plunger 501 stops at the intermediate position.

When the plunger 501 stops at the intermediate position, the pressure chamber 506 and the passage 511 are connected, and the passage 511 and the exhaust passage 513 are blocked. For this reason, the compressed air in the pressure accumulation chamber 320 is supplied to the first air chamber 12. When the pressure in the first air chamber 12 increases, the first piston 14 starts moving from the initial position toward the stopper 24. When the plunger 352 stops at the intermediate position, the connection between the passage 358 and the passage 356 is maintained, and the valve body 355 is maintained in a state stopped at the initial position. As described above, when an operating force is applied to the trigger 314 while the push lever 316 is away from the counterpart member 377, the first piston 14 of the switching mechanism 10 starts to operate from the initial position.

When the first piston 14 starts moving from the initial position toward the stopper 24, the pressure in the first oil chamber 34 increases, and the oil in the first oil chamber 34 flows into the second oil chamber 35 via the passage 26. As a result, the pressure in the second oil chamber 35 rises. When the pressure in the second oil chamber 35 increases, the second piston 15 starts moving in a direction away from the stopper 24.

When the operating force is applied to the trigger 314 and the elapsed time from the time when the compressed air is supplied to the first air chamber 12 is within a predetermined time, the second piston 15 is separated from the lever 516. When the operating force is applied to the trigger 314 and the push lever 316 is pressed against the mating member 377 within a predetermined time after the compressed air is supplied to the first air chamber 12, the transmission member 375 is Operates in a direction approaching the trigger valve 351. The tip of the lever 516 is outside the operating region of the engaging portion 375A, and the lever 516 does not block the operation of the transmission member 375. Therefore, as shown in FIG. 22, the operating force of the transmission member 375 is transmitted to the arm 349, the arm 349 moves from the intermediate position to the operating position, and the arm 349 stops at the operating position.

The operating force of the arm 349 is transmitted to the plungers 352 and 501. The plunger 352 moves from the intermediate position to the operating position and stops, and the plunger 501 moves from the initial position to the operating position and stops. When the plunger 352 stops at the operating position, the passage 358 and the space 364 are blocked, and the space 364 and the external D1 are connected. Then, the valve body 355 is actuated by the pressure of the compressed air in the passage 358 and stops at the operating position.

When the valve body 355 stops at the operating position, the passage 358 and the passage 356 are blocked, and the passage 356 and the exhaust passage 360 are connected. For this reason, the compressed air in the control chamber 327 is discharged to the outside D1 via the passage 357 and the exhaust passage 360. Then, the head valve 331 is separated from the valve seat 332 by the pressure in the pressure accumulating chamber 320, and the port 333 is opened.

The head valve 331 contacts the stopper 329, and the head valve 331 blocks the piston upper chamber 336 and the exhaust passage 324. Then, the compressed air in the pressure accumulating chamber 320 is supplied to the piston upper chamber 336, the striking portion 313 operates in the direction of the center line A6 from the top dead center to the bottom dead center, and the driver blade 335 is moved to the nail in the injection path 372. Strike 373. The hit nail 373 is driven into the counterpart material 377.

On the other hand, when the plunger 501 stops at the operating position, the seal member 509 blocks the pressure chamber 506 and the passage 511, and the seal member 510 connects the passage 511 and the exhaust passage 513. For this reason, the compressed air in the first air chamber 12 is discharged to the outside D1 via the passage 512 and the exhaust passage 513, and the pressure in the first air chamber 12 is reduced. When the pressure in the first air chamber 12 decreases, the second piston 15 operates toward the stopper 24 with the pressure in the fourth air chamber 37, and the pressure in the second oil chamber 35 increases. For this reason, according to the same principle as the switching mechanism 10 of the first embodiment, the second piston 15 stops at the initial position, and the first piston 14 stops at the initial position.

After the hitting portion 313 has driven the nail 373 into the mating member 77, the piston 334 collides with the bumper 337, and the bumper 337 absorbs a part of the kinetic energy of the hitting portion 313. The position of the hitting portion 313 at the time when the piston 334 collides with the bumper 337 is the bottom dead center. Further, while the hitting portion 313 is operating from the top dead center toward the bottom dead center, the check valve 344 opens the passage 341, and the compressed air in the piston lower chamber 339 flows from the passage 341 into the return air chamber 343.

After the nail 373 is driven into the mating member 377, when the user releases the push lever 316 from the mating material 377, the arm 349 returns from the operating position to the intermediate position and stops. The plunger 501 returns from the operating position to the intermediate position and stops. For this reason, the pressure chamber 506 and the passage 512 are connected, the passage 511 and the exhaust passage 513 are blocked, and the pressure in the first air chamber 12 increases. Further, the plunger 352 returns from the operating position to the intermediate position and stops, and the valve body 355 returns from the operating position to the initial position and stops. Therefore, the passage 358 and the passage 356 are connected, and the passage 356 and the exhaust passage 360 are blocked. For this reason, the compressed air in the pressure accumulating chamber 320 is supplied to the control chamber 327 via the passage 357, and the head valve 331 closes the port 333. Further, the piston upper chamber 336 is connected to the external D1 through the exhaust passage 324.

Then, the pressure in the piston upper chamber 336 becomes the same as the atmospheric pressure, and the piston 334 operates from the bottom dead center toward the top dead center by the pressure in the piston lower chamber 339. The compressed air in the return air chamber 343 flows into the piston lower chamber 339 via the passage 342, and the striking portion 313 returns to the top dead center and stops. Thereafter, when the operator maintains the state where the operation force is applied to the trigger 314 and repeats the operation of pressing the push lever 316 against the mating member 377 and the operation of releasing the push lever 316 from the mating material 377, the nail 373 is moved. It is possible to drive into the counterpart material 377 sequentially.

On the other hand, if the operating force is applied to the trigger 314 and the push lever 316 is not pressed against the mating member 377 within a predetermined time after the time when the compressed air is supplied to the first air chamber 12, The two pistons 15 come into contact with the lever 516. Then, the lever 516 operates counterclockwise against the force of the torsion spring 517, and as shown in FIG. 23, the lever 516 contacts the stopper 518, and the lever 516 stops at the operating position. The second piston 15 stops at the operating position. When the lever 516 stops at the operating position, the tip of the lever 516 is located in the operating region of the engaging portion 375A.

For this reason, after the operating force is applied to the trigger 314 and the elapsed time from the time when the compressed air is supplied to the first air chamber 12 exceeds a predetermined time, the push lever 316 is applied to an object other than the counterpart material 377. In the case of contact, the lever 516 engages with the engaging portion 375 </ b> A, thereby preventing the transmission member 375 from operating in a direction approaching the trigger valve 351. Therefore, the arm 349 is maintained in a state stopped at the initial position, and the striking portion 313 is stopped at the top dead center. That is, the hitting portion 313 does not operate in the direction in which the nail 373 is hit.

When the operation force on the trigger 314 is released, the plungers 352 and 501 return to their initial positions and stop as shown in FIG. 20A. Further, the first pistons 14 and 15 return to their initial positions and stop. Further, the lever 516 operates clockwise by the biasing force of the torsion spring 517, contacts the stopper 519, and stops at the initial position.

(Example in which the first mode is selected) From the state where the operating force is not applied to the trigger 314 and the push lever 316 is separated from the counterpart material 377, the operating force is not applied to the trigger 314 and the push lever 316 is set to the counterpart material 377. When pressed, the arm 349 operates from the initial position indicated by the solid line in FIG. 20A to the intermediate position indicated by the two-dot chain line and stops. The operating force of the transmission member 375 is not transmitted to the arm 349.

When an operating force is applied to the trigger 314 while the push lever 316 is pressed against the mating member 377, the plunger 501 operates from the initial position, and stops at the operating position shown in FIG. 22 without stopping at the intermediate position. . For this reason, the pressure chamber 506 and the passage 512 are blocked, and the state where the passage 512 and the exhaust passage 513 are connected is maintained. That is, the compressed air is not supplied to the first air chamber 12, and the first pistons 14 and 15 maintain the stopped state at the initial position.

Further, the plunger 352 operates from the initial position, and does not stop at the intermediate position, but stops at the operating position shown in FIG. Further, the valve body 355 moves from the initial position to the operating position and stops. For this reason, the passage 358 and the passage 356 are blocked, and the passage 356 and the exhaust passage 360 are connected. Therefore, the striking unit 313 operates from the top dead center toward the bottom dead center. Thereafter, when the operating force on the trigger 314 is released, the operating force is not transmitted from the arm 349 to the plunger 352 regardless of whether or not the push lever 316 is pressed against the mating member 377. Therefore, each of the plungers 252 and 501 returns to the 5 initial position and stops, and the valve body 355 returns to the initial position and stops.

Since the switching mechanism 10 of the fourth embodiment uses oil that can be regarded as incompressible as a working fluid, the same effect as the switching mechanism 10 of the first embodiment can be obtained. It is also possible to arrange the component 189 in the holding hole 182 without arranging the switching mechanism 10 shown in FIG. 20 in the holding hole 182. In this way, the lever 516 always stops at the initial position regardless of the elapsed time from when the operating force is applied to the trigger 314. For this reason, when the push lever 134 is pressed against the mating member 377, the operation of the transmission member 375 is not prevented.

In the first, second, and third embodiments, depending on the opening area of the passage 26 and the opening area of the notch 27, the predetermined time from when the trigger 148 is operated until the passage 40 is closed and the return time of the switching mechanism 10 are set. Can be defined. The return time is the time from when the second piston 15 starts moving toward the stopper 24 while the passage 40 is closed until the second piston 15 contacts the stopper 24. By changing the opening area of the passage 26 and the opening area of the notch 27, the predetermined time and the return time can be changed.

In the fourth embodiment, depending on the opening area of the passage 26 and the opening area of the notch 27, a predetermined time from when the trigger 314 is operated until the lever 516 moves to the operating region of the engaging portion 375A, and the switching mechanism Ten return times can be defined. The return time is the time from when the lever 516 stopped in the operating region of the engaging portion 375A starts operating clockwise in FIG. 23 until the second piston 15 contacts the stopper 24. By changing the opening area of the passage 26 and the opening area of the notch 27, the predetermined time and the return time can be changed.

An example of the technical meaning of the matters described in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment is as follows. The driving machines 100 and 310 are examples of driving machines. The triggers 148 and 314 are examples of the first operation member. The push levers 134 and 316 are examples of the second operation member. The piston upper chambers 120 and 336 are examples of pressure chambers. The nails 168 and 373 are examples of fasteners. The hitting portions 103 and 313 are examples of hitting portions.

The switching mechanism 10 is an example of a switching mechanism. The second pistons 15 and 16 are examples of operating members. The first oil chamber 34 and the second oil chamber 35 are examples of a storage chamber. The valve 17 is an example of an operation member.

The pressure accumulation chambers 110 and 320 are examples of pressure accumulation chambers. The piston upper chambers 120 and 336 are examples of pressure chambers. Ports 171 and 333 are examples of the first passage. The passage 40 is an example of a second passage. The passage 26 is an example of a first connection passage, and the passage 27 is an example of a second connection passage. The control rooms 141 and 327 are examples of the control room. The cylinder 109 and the head valve 331 are examples of valves.

In the first embodiment and the second embodiment, the trigger valve 105, the push lever valve 104, and the switching mechanism 10 are examples of an impact control unit. An example of the strikeable state is that the port 154 of the trigger valve 105 is open, the port 181 of the push lever valve 104 is open, and the passage 40 of the switching mechanism 10 is open. In the first embodiment and the second embodiment, the passage 40 of the switching mechanism 10 is closed as an example of the hit prevention state. The batting control unit can switch between the batting enabled state and the batting prevention state.

In the fourth embodiment, the trigger valve 351, the switching mechanism 10, the lever 516, the transmission member 375, the arm 349, and the trigger 314 are examples of the hit control unit. The operating force of the transmission member 375 is transmitted to the trigger valve 351 via the arm 349, the passage 356 and the exhaust passage 360 are connected, the second piston 15 is separated from the lever 516, and the lever 516 Is an example of a strikeable state. In the fourth embodiment, the second piston 15 is in contact with the lever 516 and the lever 516 prevents the transmission member 375 from operating, which is an example of a hit prevention state. The batting control unit can switch between the batting enabled state and the batting prevention state. The transmission member 375, the arm 349, and the plunger 352 correspond to the transmission path. The exhaust passage 360 is an example of a third passage.

In the first and second embodiments, the predetermined amount that the incompressible fluid flows from the first storage chamber into the second storage chamber is the oil viscosity, the pressure receiving area of the third piston 16 that receives the pressure of the second air chamber 13, It is determined according to the pressure receiving area of the second piston 15 that receives the pressure of the second oil chamber 35, the amount of movement until the passage 40 is closed after the second pistons 15 and 16 start moving from the initial position, and the like.

In the fourth embodiment, the predetermined amount of incompressible fluid flowing from the first storage chamber into the second storage chamber is the viscosity of the oil, the pressure receiving area of the second piston 15 that receives the pressure of the fourth air chamber 37, and the second oil chamber. It is determined according to the pressure receiving area of the second piston 15 that receives the pressure of 35, the amount of movement until the second piston 15 reaches the operating position from the initial position, and the like.

In the first embodiment, the second embodiment, and the fourth embodiment, the first mode can be defined as a single shot, and the second mode can be defined as a continuous shot.

The driving machine is not limited to the disclosed embodiment, and can be variously modified without departing from the gist thereof. For example, the compressible gas includes an inert gas such as nitrogen gas or a rare gas in addition to air. The operation member includes a lever, a button, an arm, and the like. The operation of the operation member may be either a rotation operation within a predetermined angle range or a linear reciprocation operation. The pressure chamber and the control chamber include a space, a region, and a passage through which compressed gas is supplied and discharged. The passage through which the compressible gas passes includes a port, a hole, and a gap. The first connection passage and the second connection passage through which the incompressible fluid passes include a port, a hole, and a gap. In the first and second embodiments, it is possible to connect the second air chamber 13 to the external D1 and provide the second air chamber 13 with a spring. In this case, the third piston 16 is biased by a biasing force of a spring provided in the second air chamber 13. The incompressible fluid is not limited to oils such as so-called hydraulic fluids such as petroleum fluids and flame retardant fluids, and silicone fluids. That is, the incompressible fluid may be a liquid substance such as grease, fats and oils, alcohols, pure water, or antifreeze. Examples of alcohols include ethylene glycol and glycerin.

DESCRIPTION OF SYMBOLS 10 ... Switching mechanism, 14 ... 1st piston, 15 ... 2nd piston, 16 ... 3rd piston, 17 ... Valve, 26, 40 ... Passage, 34 ... 1st oil chamber, 35 ... 2nd oil chamber, 100,310 ... Driver, 103,313 ... Blowing part, 104 ... Push lever valve, 105,351 ... Trigger valve, 109 ... Cylinder, 110,320 ... Accumulator, 120,336 ... Piston upper chamber, 134,316 ... Push lever , 141, 327 ... control room, 148, 314 ... trigger, 168, 373 ... nail, 171, 333 ... port, 331 ... head valve, 349 ... arm, 352 ... plunger, 375 ... transmission member, 516 ... lever

Claims (11)

An operation member to which an operator applies an operating force, a pressure chamber to which a compressible gas is supplied when the operating force is applied to the operating member, and a pressure of the compressible gas to be supplied to the pressure chamber are stopped. A striking machine having a striking portion that operates in the direction of striking a tool, and capable of striking capable of supplying the compressible gas to the pressure chamber when an operating force is applied to the operating member. A striking control unit having a state and a striking prevention state that prevents the compressible gas from being supplied to the pressure chamber when the operation member is operated;
When the elapsed time from the time when the operating force is applied to the operating member is within a predetermined time, the batting control unit is set in the strikeable state, and when the elapsed time exceeds the predetermined time, the batting control unit is A switching mechanism for preventing the impact,
Is provided,
The switching mechanism is
An actuating member that operates to switch the batting control unit between the batting enable state and the batting prevention state;
And a storage chamber containing an incompressible fluid for operating the operating member. The operating member is
A first operating member to which the operator applies operating force by hand;
A second operating member capable of contacting and separating from the counterpart material;
Have
2. The driving machine according to claim 1, wherein the batting control unit enters the batting enabled state when an operating force is applied to the first operating member and the second operating member contacts the mating member. 3. The driving machine according to claim 2, wherein the elapsed time starts when the second operating member is separated from the counterpart material and an operating force is applied to the first operating member. The storage chamber includes a first storage chamber and a second storage chamber, and when the incompressible fluid flows from the first storage chamber into the second storage chamber by a predetermined amount, the actuating member moves the hit control unit. The hitable state is switched from the hitable state to the hitterless state, and the predetermined time is a predetermined amount of the incompressible fluid from the first storage chamber to the second storage chamber from the time when the operating force is applied to the operating member. 4. The driving machine according to claim 2, wherein the driving machine is a time required to flow. A pressure accumulating chamber for storing the compressible gas;
A first passage for supplying the compressible gas from the pressure accumulation chamber to the pressure chamber;
A control chamber that is supplied with the compressible gas and discharges the compressible gas;
A valve that opens and closes the first passage by operating with the pressure of the control chamber;
The driving machine according to claim 1, comprising: The valve opens the first passage when the compressible gas is supplied to the control chamber, and closes the first passage when the compressible gas is discharged from the control chamber.
The impact control unit has a second passage for supplying the compressible gas to the control chamber,
The driving device according to claim 5, wherein the hit control unit opens the second passage in the hittable state and closes the second passage in the hit preventing state. The valve opens the first passage when the compressible gas is discharged from the control chamber, and closes the first passage when the compressible gas is supplied to the control chamber.
The impact control unit has a third passage for discharging the compressible gas from the control chamber,
The driving device according to claim 5, wherein the hit control unit opens the third passage in the hittable state and closes the third passage in the hit preventing state. The striking control unit transmits the operating force of the operation member to the striking control unit, and has a transmission path that can be connected and disconnected,
The said hit | damage control part connects the said transmission path in the said striking possible state, and interrupts | blocks the said transmission path in the said hit | damage prevention state, The any one of Claims 1, 2, 3, 4, 5, 7 The driving machine described. The switching mechanism, when an operating force is applied to the first operating member after the second operating member comes into contact with the counterpart material, makes the batting control unit in the batting enabled state regardless of the elapsed time; The driving machine according to claim 3. A striking control unit having a striking enabling state in which a compressible gas can be supplied to the pressure chamber and a striking preventing state in which the compressing gas is not supplied to the pressure chamber is divided between the striking possible state and the striking preventive state. A switching mechanism for switching,
A first storage chamber and a second storage chamber;
A first connection passage connecting the first storage chamber and the second storage chamber;
Connecting the first storage chamber and the second storage chamber, a second connection passage disposed in parallel with the first connection passage;
An actuating member that operates with the pressure of the second storage chamber;
An incompressible fluid sealed across the first storage chamber and the second storage chamber;
Have
When the incompressible fluid in the first storage chamber flows into the second storage chamber via the first connection passage, the actuating member is actuated to move the hitting control unit from the hittable state to the hitting state. Switch to blocking state,
When the incompressible fluid in the second storage chamber flows into the first storage chamber via the second connection passage, the operation member operates to move the hit control unit from the hit prevention state to the hit Switch to enabled state,
The switching mechanism, wherein an opening area of the second connection passage is wider than an opening area of the first connection passage. The switching mechanism according to claim 10, wherein the first connection passage and the second connection passage are provided in the operating member.

Images