Insertion tool

Abstract

The present invention relates to a driving tool. A gas spring type driving tool that uses the air pressure in the upper chamber of a cylinder as the thrust for driving has a lifting mechanism that meshes a lifting wheel with a rack of a driver, thereby moving a piston upward. After driving, it is necessary to move the driver upward to a standby position through the lifting mechanism. Therefore, after driving, even if the trigger is released, the electric motor needs to be started for a certain period of time. The motor starting state is achieved through a mechanical structure. After driving, a limiting member (41) is held at an upward moving on position by a cam (23). An energization switch (12) is held in an on state by an operating portion (45b) of the limiting member (41). Thus, after driving, even if the trigger (8) is released, the electric motor (32) is held in a starting state, and the driver is returned to the standby position.

Description

Technical Field

[0001] The present invention relates to a driving tool for driving nails, staples and other driving members into driving materials such as wood. Background Art

[0002] Known driving tools include, for example, air spring type and mechanical spring type. The air spring type driving tool disclosed in Patent Document 1 has: a driver that impacts a driving member; a rack that moves the driver upward (in a direction opposite to the driving direction); and a wheel portion that meshes with the rack. The rack is provided on the driver. The driver is integrally coupled with a piston. After the driving operation, the wheel portion is rotated by an electric motor and meshes with the rack. As a result, the rack, the driver, and the piston move in a direction opposite to the driving direction. By the piston returning in a direction opposite to the driving direction, the air pressure in the upper chamber (pressure storage chamber) of the piston rises. By the pressure (thrust) of the gas stored in the pressure storage chamber, the piston moves downward in the driving direction, thereby impacting the driving member.

[0003] The mechanical spring type driving tool disclosed in Patent Document 2 has: a driver that impacts a driving member; a compression spring that biases the driver in the driving direction; a roller that engages with the driver in the driving direction and in a direction opposite to the driving direction; and a gear that has a roller at an eccentric position. After the driving operation, the gear is rotated by an electric motor, causing the roller to displace in a direction opposite to the driving direction. As a result, the driver moves in a direction opposite to the driving direction against the compression spring. By the biasing force of the compression spring compressed by the driver moving in a direction opposite to the driving direction, the driver moves downward in the driving direction, thereby impacting the driving member.

[0004] In such a driving tool, it is necessary to return the driver that has reached the lower moving end through the driving operation to a standby position slightly below the upper moving end in a direction opposite to the driving direction. Therefore, after the driving operation, it is necessary to continue the starting state of the electric motor for a certain period of time after the on-operation of the trigger is released. In order to continue the starting state after driving, in the air spring type driving tool disclosed in Patent Document 1, the on / off operation of the trigger and the switching of the on / off state of the power switch are electrically controlled by a controller. However, in the above-described electrically controlled starting control, the control content of the controller covers multiple aspects, and as a result, there may be a malfunction due to certain reasons.

[0005] On the other hand, in the driving tool disclosed in Patent Document 2, the on / off operation of the trigger and the on / off operation of the power switch are switched between a linked state and an unlinked state by a linkage member. According to the above-described mechanical starting control, the possibility of malfunction can be reduced compared to the above-described electrically controlled starting control.

[0006] [Prior art documents]

[0007] [Patent documents]

[0008] Patent Document 1: Specification of U.S. Patent No. 8,387,718

[0009] Patent Document 2: Japanese Patent Gazette No. 4749828 Summary of the invention

[0010] [Technical problem to be solved by the invention]

[0011] Therefore, for a pneumatic spring type driving tool, it is also desired to configure it to maintain the starting state of the electric motor through mechanical starting control. However, it is difficult to directly apply the conventional mechanical starting control to the pneumatic spring type driving tool.

[0012] In a mechanical spring type driving tool, since the compression spring is compressed to move the driver upward, a force for compression can be applied in a position away from the compression spring so that the driver engages with the roller. In this regard, in a pneumatic spring type driving tool, in order to avoid an eccentric load relative to the piston, it is desired to directly apply an external force for upward movement to the driver. Therefore, in a pneumatic spring type driving tool, it is configured to directly apply a force for upward movement to the driver in such a way that a wheel portion engages with a rack provided on the driver. Thus, it is difficult to directly apply the conventional mechanical starting control in which the gear is arranged away from the trigger to the pneumatic spring type driving tool. In the present invention, the object is to independently control the starting state of the electric motor through a mechanical structure in a pneumatic spring type driving tool, independently of the trigger operation.

[0013] [Technical solution for solving the technical problem]

[0014] According to one technical solution of the present invention, the driving tool has a piston and a driver. The piston is installed inside the cylinder in a reciprocating up-and-down movement manner. The driver is combined with the piston and moves downward in the driving direction. The lifting wheel meshes with the rack of the driver. The lifting wheel is rotated by an electric motor. The electric motor is started by moving the trigger to the on position. When the trigger is in the on position, the power switch is turned on, and a state where power can be supplied to the electric motor is achieved. The driving tool has a restricting member that can move between a locking position and an unlocking position. The locking position is the position where the restricting member holds the power switch in the on state, and the unlocking position is the position where the restricting member allows the power switch to be in the off state. The driving tool has a cam, which is structured to be linked with the lifting wheel and has a contact area and a disengagement area. In the contact area, it interferes with the restricting member and holds the restricting member in the locking position. In the disengagement area, it allows the restricting member to move to the unlocking position.

[0015] Therefore, through the cam, the restricting member is held in the locking position that locks the power switch in the on state, and the electric motor remains in the starting state regardless of the on operation of the trigger. Accordingly, in a gas spring type driving tool, through a mechanical structure having a restricting member and a cam, regardless of the trigger operation, the starting state of the electric motor is maintained after the driving action, and the driver is returned to the standby position.

[0016] According to another technical solution of the present invention, by moving the trigger to the on position, the restricting member moves to the locking position. Therefore, the movement operation of the trigger to the on position is associated with the movement action of the restricting member to the locking position. Thus, a simplification of the structure for maintaining the on state of the power switch can be achieved. In contrast, for example, by separately providing the engaging portion for the restricting portion and the portion where the trigger abuts on the operating portion of the power switch, a structure in which the two operations are independent can be formed.

[0017] According to another technical solution of the present invention, the cam is arranged to be rotatable coaxially with the lifting wheel. Therefore, the cam is configured compactly.

[0018] According to another technical solution of the present invention, the contact area of the cam extends in a radial direction at a first distance from the rotation center. The disengagement area of the cam extends at a second distance closer to the rotation center than the first distance. Therefore, the cam has a contact area (large diameter portion) and a disengagement area (small diameter portion) along the rotation direction. The restricting member engages with the contact area, thereby locking the on state of the power switch. The restricting member engages with the disengagement area, thereby releasing the on state of the power switch. By the rotation of the cam, the locking state that locks the on state of the power switch and the unlocking state of unlocking the locking state are switched.

[0019] According to another technical solution of the present invention, during the movement of the driver from the lower mobile end position to a specified position towards the standby position, the on-region of the cam extends in a manner that interferes with the limiting member. For example, the specified position is the standby position or a position close to the standby position. Therefore, the energization switch is locked in the on-state by the engagement of the limiting member with the on-region, and accordingly, the starting state of the electric motor is maintained even after driving. Thereby, the driver can reliably return from the lower mobile end position to the standby position.

[0020] According to another technical solution of the present invention, in the direction of connecting the trigger and the driver, the limiting member and the cam are located between the trigger and the driver. Therefore, the limiting member and the cam are compactly arranged at a position where it is easy to ensure a relatively idle space. The direction in which the trigger and the driver are connected corresponds to the direction passing through both the trigger and the driver.

[0021] According to another technical solution of the present invention, a guide roller is provided for guiding the movement of the limiting member. Therefore, the limiting member is smoothly moved under the guidance of the guide roller.

[0022] According to another technical solution of the present invention, when the cam applies a force to the limiting member in a direction orthogonal to the moving direction of the limiting member, a guide roller is arranged on the side portion of the limiting member in a direction opposite to the force. Therefore, in a state where the limiting member is subjected to a force from the cam in a direction causing it to displace laterally in a direction orthogonal to its moving direction, the limiting member can smoothly move between the locking position and the unlocking position.

[0023] According to another technical solution of the present invention, the guide roller is configured to guide the limiting member at least on one side in the orthogonal direction orthogonal to the moving direction of the limiting member and in a direction parallel to the rotation axis of the cam. Therefore, the limiting member is guided from at least one direction parallel to the rotation axis of the guide roller. Thereby, the limiting member can be moved more smoothly.

[0024] According to another technical solution of the present invention, the driving tool is turned on through both the trigger and the contact rod, and the operating portion of the contact rod engages with the idler of the trigger to turn on the energization switch to perform the driving action. The driving action can be switched between two modes: a single-shot driving mode and a continuous-firing driving mode. In the single-shot driving mode, when the contact rod is turned on in the on-operation state of the trigger, the engagement between the operating portion and the idler is avoided, and the energization switch is not turned on. In the continuous-firing driving mode, regardless of the order of the on-operation of the trigger and the on-operation of the contact rod, the operating portion always engages with the idler to turn on the energization switch. The single-shot driving mode and the continuous-firing driving mode are switched by changing the position of the trigger.

[0025] Therefore, by changing the position of the trigger, the driving action is switched to a single-shot driving mode or a continuous-shot driving mode. In the single-shot driving mode, the driving action is performed by first operating the contact rod to be turned on and then operating the trigger to be turned on. When the contact rod is operated to be turned on while the trigger is already in the on state, since the moving part of the contact rod does not engage with the idler wheel of the trigger, the power-on switch is not turned on. Thus, the driving action is not performed. In the continuous-shot driving mode, regardless of the operating sequence of the trigger and the contact rod, the moving part of the contact rod engages with the idler wheel of the trigger, turning on the power-on switch. Therefore, the driving action is performed. By being able to switch between the single-shot driving mode and the continuous-shot driving mode in a manner matching the operation method, the workability of the driving tool can be improved.

[0026] According to another technical solution of the present invention, the restricting member is located between the power-on switch and the idler wheel. Through the on operations of the trigger and the contact rod, the restricting member is pushed by the idler wheel and moves to the locking position. By the restricting member moving to the locking position, the power-on switch is turned on and the driving action is performed. Therefore, by using the restricting member for restricting the on / off state of the power-on switch, the power-on switch is turned on. Thereby, the simplification of the structure can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an overall side view of the driving tool.

[0028] Figure 2 is Figure 1 a sectional view taken along line II-II in [FIGURE NUMBER], and is a longitudinal sectional view of the driving part and the lifting part.

[0029] Figure 3 is an exploded perspective view of the lifting part.

[0030] Figure 4 is a right side view of the tool body. This figure shows the standby state.

[0031] Figure 5 is Figure 4 the same as [FIGURE NUMBER], and this figure also shows the standby state.

[0032] Figure 6 is Figure 4 a sectional view taken along line VI-VI in [FIGURE NUMBER], and is a transverse sectional view of the tool body.

[0033] Figure 7 is an enlarged right side view of the start state locking mechanism. This figure is the enlarged view Figure 4 of the corresponding part in [FIGURE NUMBER].

[0034] Figure 8 is Figure 7View from the VIII-VIII line in the middle, and it is a cross-sectional view of the lifting part and the starting state locking mechanism. This figure is enlarged Figure 6 of the corresponding part in the middle.

[0035] Figure 9 It is a side view of the tool body. This figure shows the state just before driving when the trigger is pulled.

[0036] Figure 10 It is a longitudinal cross-sectional view of the tool body. Similar to Figure 7 this, this figure also shows the state just before driving.

[0037] Figure 11 It is Figure 9 the view from the XI-XI line in the middle, and it is a cross-sectional view of the tool body.

[0038] Figure 12 It is a side view of the tool body. This figure shows the state where the driver moves to the lower mobile end and the driving piece is driven.

[0039] Figure 13 It is a longitudinal cross-sectional view of the tool body. Similar to Figure 12 this, this figure also shows the state during driving.

[0040] Figure 14 It is Figure 12 the view from the XIV-XIV line in the middle, and it is a cross-sectional view of the tool body.

[0041] Figure 15 It is a side view showing the left side of the tool body and observing the mode switching lever from the left side. This figure shows the state after switching the mode switching lever to the single-shot driving mode.

[0042] Figure 16 It is Figure 15 the view from the XVI-XVI line of

[0043] Figure 17 It is a longitudinal cross-sectional view around the trigger support part. This figure shows the state where the contact piece is connected and the trigger is disconnected in the single-shot driving mode.

[0044] Figure 18 It is a longitudinal cross-sectional view around the trigger support part. This figure shows the state where the contact piece is connected and the trigger is connected in the single-shot driving mode.

[0045] Figure 19 It is a longitudinal cross-sectional view around the trigger support part. This figure shows the state where the contact piece is disconnected and the trigger is connected in the single-shot driving mode.

[0046] Figure 20It is a side view showing the left side of the tool body and observing the mode switching lever from the left. This figure shows the state after the mode switching lever is switched to the continuous firing mode.

[0047] Figure 21 is Figure 20 a sectional view taken along line XXI-XXI of, and is a longitudinal sectional view of the trigger support portion.

[0048] Figure 22 It is a longitudinal sectional view of the periphery of the trigger support portion. This figure shows the state where the contact member is disconnected and the trigger is turned on in the continuous firing mode.

[0049] Figure 23 It is a longitudinal sectional view of the periphery of the trigger support portion. This figure shows the state where the contact member is connected and the trigger is turned off in the continuous firing mode.

[0050] [Explanation of reference numerals]

[0051] W: Driving material; N: Driving member; 1: Driving tool; 2: Main body housing; 2a: Cover portion; 2b: Support cylinder portion; 2c: Support wall portion; 3: Cylinder; 3a: Upper chamber of the cylinder; 3b: Lower mobile end shock absorber; 4: Piston; 5: Driving protrusion; 5a: Driving passage; 5b: Ejection port; 6: Nail magazine; 7: Handle portion; 7a: Battery mounting portion; 8: Trigger; 8a: Support shaft; 8b: Idler gear; 8c: Support shaft; 9: Battery pack; 10: Tool body; 11: Driver; 12: Power-on switch; 12a: Operating portion; 13: Rack; 13a: Engaging teeth; 15: Contact rod; 15a: Compression spring; 15b: Contact portion; 15c: Contact sensor; 15d: Operating portion; 15e: Support portion; 16: Mode switching lever; 16a: Knob portion; 17: Eccentric support portion; 20: Lifting portion; 21: Mechanism housing; 21a: Window portion (left side); 21b: Window portion (right side); 21c: Base portion; 22: Lifting wheel; 22a: Flange portion; 22b: Engagement pin; 22c: Retreating portion; 23: Cam; 23a: On region (large diameter portion); 23b: Off region (small diameter portion); 24: Support shaft; 24a, 24b: Bearings; 25: Cover portion; 30: Driving portion; 31: Driving portion housing; 32: Electric motor; J: Motor axis; 33: Reduction gear set; 33a, 33b, 33c: Planetary gear set; 40: Start state locking mechanism; 41: Restricting member; 41a: Arc surface; 42: Compression spring; 43: Mechanism cover; 43a: Fixing screw; 43b: First roller; 43c: Second roller; 43d: Retreating window; 44: Lateral roller; 45: Restricting arm; 45a: Coupling portion; 45b: Operating portion; 45c: Retreating window; 46: Fixing screw; 47: Pressing pin. Detailed implementation mode

[0052] Next, according toFigures 1 to 23 The driving tool 1 related to the embodiment of the present invention will be described. In the present embodiment, as the driving tool 1, a gas spring type driving tool that uses the air pressure in the upper chamber of the cylinder as the thrust for driving the driving piece N is exemplified. Figure 1 Fig. shows the driving tool 1 related to the present embodiment. As the driving piece N, a nail is exemplified. In the following description, as shown in the respective figures, the driving direction of the driving piece N is set to the lower side, and the direction opposite to the driving direction is set to the upper side. The driver 11 described below moves downward, so that the driving piece N is driven in. After the driving, the driver 11 returns upward. The user of the driving tool 1 is Figure 1 substantially located on the left side of the driving tool 1. The near front side of the user is set as the rear side (user side), and the front side is set as the front side. In addition, the left and right directions are the directions used based on the user.

[0053] As shown in Figure 5 、 6 , the driving tool 1 has a tool main body 10 in which a cylinder 3 is installed in a cylindrical main body housing 2. A piston 4 is supported in the cylinder 3 so as to be able to reciprocate up and down. At the center of the lower surface of the piston 4, there is a driver 11 for impacting the driving piece N. The piston 4 and the driver 11 are arranged so as to be able to move up and down integrally in the cylinder 3. The driver 11 extends downward for a long distance. The top side of the driver 11 enters the driving passage 5a of the driving protrusion 5 provided on the lower surface side of the tool main body 10. As shown in Figure 6 , a rack 13 is provided on the right side portion of the driver 11. The rack 13 has a plurality of (seven in Figure 6 ) engaging teeth 13a.

[0054] The lower end of the driving protrusion 5 becomes the ejection port 5b for ejecting the driving piece N. In Figure 5 、 6 , a standby state in which the piston 4 is held near the upper part of the cylinder 3 is shown.

[0055] The contact rod 15 is arranged side by side with the driving protrusion 5. The contact rod 15 is arranged so as to be able to displace up and down along the driving protrusion 5. The contact rod 15 is biased by a compression spring 15a in the direction of displacement downward. A contact portion 15b is provided at the lower part of the contact rod 15. The contact portion 15b protrudes below the ejection port 5b. In a state where the contact portion 15b abuts against the driving material W, by pressing down the driving tool 1, the contact rod 15 moves upward relative to the driving protrusion 5. The upward movement action (switching-on operation) of the contact rod 15 relative to it is detected by a contact sensor 15c. The switching-on operation of the contact rod 15 detected by the contact sensor 15c is used as a condition for performing the driving action.

[0056] On the side of the main body housing 2, a handle portion 7 for the user to hold is provided. On the lower surface side of the base portion of the handle portion 7, a trigger 8 is provided for being operated by the fingertips of the held hand to be depressed. As Figure 5 shown, the trigger 8 is provided to be rotatable up and down through a support shaft 8a. A belt-shaped idler wheel 8b is provided on the upper surface of the trigger 8. The rear side end portion of the idler wheel 8b is supported on the upper surface side of the trigger 8 through a support shaft 8c. The idler wheel 8b is supported to be rotatable up and down through the support shaft 8c.

[0057] The upper side of the contact lever 15 extends to the vicinity below the trigger 8. An operation portion 15d and a support portion 15e are provided on the upper portion of the contact lever 15. The operation portion 15d extends below the idler wheel 8b. The support portion 15e is inserted through a cylindrical support tube portion 2b integrally provided with the main body housing 2. Thus, the upper side of the contact lever 15 is supported on the tool main body 10 in a vertically movable manner. As Figure 10 shown, in the single-shot driving mode described later, when the contact lever 15 is first turned on, the operation portion 15d approaches the idler wheel 8b. By the approaching operation portion 15d, the downward displacement of the rotation top end side of the idler wheel 8b is restricted. By restricting the rotation operation of the idler wheel 8b, the subsequent depression operation of the trigger 8 becomes effective. By the effective depression operation of the trigger 8, the operation portion 12a of the power-on switch 12 is pressed upward by the idler wheel 8b. Thus, the power-on switch 12 is turned on.

[0058] As Figure 10 shown, in the single-shot driving mode, in a state where the contact lever 15 is not first turned on, the operation portion 15d is in a state of retracting downward relative to the idler wheel 8b. Therefore, when the trigger 8 is first depressed, the state where the downward displacement of the rotation top end side of the idler wheel 8b is restricted by the operation portion 15d is not formed. Therefore, the idler wheel 8b rotates downward, and the operation portion 12a of the power-on switch 12 is not pushed. As a result, the depression operation of the trigger 8 becomes ineffective (idle swing), the power-on switch 12 is not turned on, and the driving operation is not performed. In this way, in the single-shot driving mode, the contact lever 15 is first turned on, and then the trigger 8 is turned on. In this case, the driving operation is performed. The single-shot driving mode will be described later.

[0059] Near the front portion of the handle portion 7 and above the trigger 8, a power-on switch 12 is installed. The power-on switch 12 has an operation portion 12a on the lower surface side. For example, by the depression operation of the trigger 8, the operation portion 12a is pressed upward, and thus the power-on switch 12 is turned on. By turning on the power-on switch 12, an electric motor 32 described later is started.

[0060] As Figure 1 、 2As shown, a battery mounting portion 7a is provided on the rear side of the handle portion 7 for mounting a battery pack 9 as a power source. As the battery pack 9, a lithium-ion battery having a substantially hexahedral sliding mounting form is used. By sliding the battery pack 9 downward relative to the battery mounting portion 7a from above, the battery pack 9 can be mounted on the battery mounting portion 7a. Although not observable in the figure, by sliding it upward in a state where the unlocking button is pressed, the battery pack 9 can be removed from the battery mounting portion 7a. The removed battery pack 9 can be charged by a separately prepared charger and can be used as a power source for other power tools. The nail magazine 6 filled with a plurality of driving members N is coupled to the driving protrusion 5.

[0061] As Figures 1 to 4 , 6 show that a lifting portion 20 is provided near the upper part of the driving protrusion 5 on the right side of the tool main body 10 for integrally returning the piston 4 and the driver 11 upward. As Figure 5 , 6 show, by using the lifting portion 20 to return the piston 4 upward, the air pressure in the upper cylinder chamber 3a on the upper surface side of the piston 4 can be increased. Due to the increased air pressure in the upper cylinder chamber 3a, the piston 4 moves downward and the driving member N is impacted by the driver 11. When the piston 4 moves upward, the thrust for the driving action is stored in the upper cylinder chamber 3a. The upper cylinder chamber 3a is hermetically sealed by a cover portion 2a mounted on the upper part of the main body housing 2. A lower moving end shock absorber 3b is disposed at the lower part of the cylinder 3 for absorbing the shock generated by the piston 4 at the lower moving end.

[0062] As Figure 1 , 2 show, the driving portion 30 is arranged side by side with the lifting portion 20. The driving portion 30 actuates the lifting portion 20. The driving portion 30 is housed in a driving portion housing 31 that extends in a substantially L shape across between the lower parts of the lifting portion 20 and the battery mounting portion 7a. The driving portion housing 31 is integrally provided with the main body housing 2. The lifting portion 20 is also covered by the driving portion housing 31.

[0063] The driving portion 30 has an electric motor 32 as a driving source. The electric motor 32 is housed such that the axis (motor axis J) of the output shaft 32a of the electric motor 32 is along the front-rear direction orthogonal to the driving direction. The electric motor 32 is started using the electric power of the battery pack 9 as a power source. As described above, by operating the power-on switch 12 to turn it on, the electric motor 32 is started by being powered on.

[0064] The output shaft 32a of the electric motor 32 is connected to the reduction gear set 33. The reduction gear set 33 uses three planetary gear sets 33a, 33b, and 33c. The three planetary gear sets 33a, 33b, and 33c are coaxially arranged on the motor axis J in a coaxial manner. The rotational output of the electric motor 32 is reduced by the three planetary gear sets 33a, 33b, and 33c and output to the lifting unit 20.

[0065] As Figure 2 , 3 , as shown in FIGS. 6, the lifting unit 20 has a cylindrical mechanism housing 21. The mechanism housing 21 is integrally provided with the main body housing 2. The mechanism housing 21 is provided on the right side portion of the portion straddling the driving protrusion 5 and the tool main body 10. The lifting wheel 22 and the cam 23 are installed inside the mechanism housing 21. As Figure 2 shown in FIG. 9, the lifting wheel 22 and the cam 23 are coaxially coupled by a support shaft 24. The lifting wheel 22 and the cam 23 are fixed so as not to move axially and not to rotate about the axis with respect to the support shaft 24. Therefore, the lifting wheel 22 rotates integrally with the cam 23. In Figure 6 , 8 , FIGS. 11 and 14, as shown by the arrow L, the lifting wheel 22 and the cam 23 rotate counterclockwise when viewed from the front.

[0066] The support shaft 24 is rotatably supported by bearings 24a and 24b in the mechanism housing 21. The front side of the mechanism housing 21 is closed by a cover portion 25. The front bearing 24a is held by the cover portion 25, and the rear bearing 24b is held by the bottom of the mechanism housing 21.

[0067] The rotation axis of the support shaft 24 coincides with the motor axis J. The rear end portion of the support shaft 24 is coupled to the output side of the reduction gear set 33 (the planet carrier 33d of the third planetary gear set 33c). When the electric motor 32 is started, the lifting wheel 22 and the cam 23 rotate integrally about the motor axis J via the reduction gear set 33.

[0068] As Figure 2 , 3 shown in FIGS. 26, the lifting wheel 22 has two flange portions 22a that are parallel to each other with a certain interval therebetween. Across the peripheral portions between the two flange portions 22a, a plurality of (for example, six in this embodiment) engagement pins 22b are provided in a supported state at both ends. As Figure 6 shown in FIG. 28, each engagement pin 22b meshes with the rack 13 of the driver 11. The plurality of engagement pins 22b are provided in a certain range in the circumferential direction of the lifting wheel 22. As Figure 3 , 6As shown, in the present embodiment, six engaging pins 22b are arranged at equal intervals within a range of approximately a half circle. In the remaining range other than the range of approximately a half circle where a plurality of engaging pins 22b are arranged, the two flange portions 22a are made smaller in diameter to form a retracted portion 22c.

[0069] The mechanism housing 21 is provided with two window portions 21a and 21b. The two window portions 21a and 21b are arranged with a slight offset in the direction of the motor axis J. As Figure 2 shown, the left window portion 21a is arranged with a slight forward offset in the direction of the motor axis J compared to the right window portion 21b. The rack 13 of the driver 11 enters the left window portion 21a. Therefore, the left window portion 21a is set within a range that allows each engaging tooth 13a of the rack 13 to move up and down and enter and exit the mechanism housing 21. The engaging pin 22b of the lifting wheel 22 engages with the engaging tooth 13a that enters the mechanism housing 21.

[0070] In a state where the retracted portion 22c of the lifting wheel 22 faces the left window portion 21a, each engaging pin 22b is located in an area away from the rack 13. Therefore, each engaging pin 22b does not engage with the engaging tooth 13a of the rack 13. Thus, the downward movement operation of the driver 11 does not interfere with the lifting wheel 22.

[0071] The restricting member 41 of the start state locking mechanism 40 enters the right window portion 21b. The restricting member 41 that enters the mechanism housing 21 through the right window portion 21b engages with the cam 23. The cam 23 is a substantially circular cam plate and has a connecting region 23a and a disconnecting region 23b. The connecting region 23a corresponds to a large-diameter portion with a first distance from the rotation center (cam center) of the cam 23. The disconnecting region 23b corresponds to a small-diameter portion with a second distance less than the first distance from the rotation center of the cam 23.

[0072] During the upward movement of the driver 11 from the lower movement end position to the standby position, the connecting region 23a extends along the range where it interferes with the restricting member 41. In the present embodiment, the connecting region 23a is set in a range of approximately 3 / 4 in the circumferential direction. The disconnecting region 23b with a diameter smaller than the connecting region 23a is set in the remaining range of approximately 1 / 4 in the circumferential direction. Therefore, at the stage where the portion facing the lower side of the restricting member 41 transfers from the connecting region 23a to the disconnecting region 23b, the driver 11 is in a state where it has returned to the standby position.

[0073] The start state locking mechanism 40 has the function of locking the on state of the power-on switch 12 and maintaining the start state (power-on state) of the electric motor 32. Therefore, after the driving operation, when the user releases the on operation of the trigger 8, the start state of the electric motor 32 will be maintained for a certain period of time. In Figure 7, 8 Details of the start state locking mechanism 40 are shown therein.

[0074] The start state locking mechanism 40 has a restricting member 41 and a restricting arm 45. As Figure 8 shown, the restricting member 41 has a rod shape with a rectangular cross-section. The restricting member 41 is supported by a base portion 21c integrally provided with the mechanism housing 21. The base portion 21c is located at the upper part of the mechanism housing 21 and is provided in a state of protruding upward between the left window portion 21a and the right window portion 21b. The lower side of the restricting member 41 enters the mechanism housing 21 through the right window portion 21b. The lower part of the restricting member 41 that enters the mechanism housing 21 engages with the cam 23.

[0075] The restricting member 41 is urged downward by a compression spring 42. Therefore, due to the applied force of the compression spring 42, the lower part of the restricting member 41 engages with the conduction region 23a or approaches the disconnection region 23b. When the opposing portion (the portion located below) of the restricting member 41 switches from the conduction region 23a to the disconnection region 23b by the rotation of the cam 23, the restricting member 41 is urged downward by the compression spring 42, so that the restricting member 41 reliably approaches the disconnection region 23b. When the opposing portion of the restricting member 41 switches from the disconnection region 23b to the conduction region 23a, the restricting member 41 retracts upward against the compression spring 42, so that the restricting member 41 engages (abuts) with the conduction region 23a. In the present embodiment, by the conduction operation of the trigger 8, the restricting member 41 is pre-retracted upward against the compression spring 42.

[0076] On the lower surface of the restricting member 41, an arc surface 41a having the same curvature as the conduction region 23a is formed. By the sliding contact of the arc surface 41a with the conduction region 23a, the restricting member 41 engages with the cam 23 in a surface contact state. Thereby, smooth movement of the restricting member 41 and the cam 23 can be ensured, and uneven wear thereof can be avoided.

[0077] As Figure 8 shown, the restricting member 41 is supported between the base portion 21c and the mechanism cover 43. As Figure 1 , 3 , 4, 7 shown, the mechanism cover 43 has a rectangular flat plate shape. The mechanism cover 43 is coupled to the base portion 21c by three fixing screws 43a. As Figure 4 , 6As shown in FIGS. 1 to 8, two side rollers 44 are held at the right side portion of the restricting member 41. The two side rollers 44 are abutted against the mechanism cover 43, thereby being prevented from falling off the restricting member 41. The two side rollers 44 are held such that their axes are oriented along the front-rear direction (the direction of the motor axis J). The two side rollers 44 are held at an interval in the vertical direction. Thus, at the stage where the restricting member 41 is displaced vertically, the two side rollers 44 always roll on the mechanism cover 43. Thus, the vertical movement of the restricting member 41 is guided. Further, by the two side rollers 44 rolling on the mechanism cover 43, the mechanism cover 43 can reliably bear the external force to the right received by the lower portion of the restricting member 41 from the cam 23. Thus, it is possible to prevent the restricting member 41 from swaying particularly in the left-right direction.

[0078] As Figure 7 shown, two first rollers 43b and two second rollers 43c are interposed between the mechanism cover 43 and the base portion 21c. The two front first rollers 43b are abutted against the front surface of the restricting member 41. The two rear second rollers 43c are abutted against the rear surface of the restricting member 41. The restricting member 41 is guided by the two first rollers 43b and the two second rollers 43c on one side and the other side in the orthogonal direction orthogonal to its moving direction (vertical direction).

[0079] The rotation axes of the first roller 43b and the second roller 43c (in Figure 7 it is the direction orthogonal to the paper surface) are orthogonal to the rotation axes of the side rollers 44 (in Figure 7 it is the paper surface direction). Each of the first roller 43b and the second roller 43c has two that are abutted against the front and rear side portions of the restricting member 41. The vertical interval between the two rear second rollers 43c is slightly larger than the vertical interval between the two front first rollers 43b. By arranging two first rollers 43b and two second rollers 43c in the front and rear, it is possible to avoid the swaying of the restricting member 41 in the front-rear direction. Thus, the vertical movement of the restricting member 41 can be guided smoothly. The two side rollers 44, the two first rollers 43b, and the two second rollers 43c function as guide rollers to guide the restricting member 41 in the engaging direction with the cam 23 and the direction opposite to the engaging direction (vertical direction).

[0080] The engaging portion 45a of the restricting arm 45 is coupled to the right side portion of the restricting member 41. The engaging portion 45a is coupled to the restricting member 41 by one fixing screw 46 and two press-in pins 47 so as not to sway. A retracting window 43d for retracting the head of the fixing screw 46 is provided on the mechanism cover 43.

[0081] The restricting arm 45 has an engaging portion 45a and an operating portion 45b. As Figure 7As shown, when viewed from the right side, the operating portion 45b extends rearward in a manner that it is combined with the coupling portion 45a to form a T-shape. As Figure 5 shown, the operating portion 45b extends above the trigger 8. A retraction window 45c is provided on the operating portion 45b. The top end side of the idler wheel 8b moves forward and backward within the retraction window 45c. The rear end portion of the operating portion 45b abuts against the operating portion 12a of the power-on switch 12. When the operating portion 45b moves upward, the operating portion 12a is pressed toward the on side, thereby turning on the power-on switch 12.

[0082] Next, a series of driving operations will be described. The user holds the handle portion 7, and as Figure 1 shown, the abutting portion 15b of the contact rod 15 is made to abut against the driving material W. The trigger 8 is not operated by being pulled. This state corresponds to the standby state. As Figure 5 、 6 shown, in the standby state, the piston 4 is held near the upper part of the cylinder 3. Therefore, a state is formed in which the lower side of the driver 11 enters the upper part of the driving passage 5a. As Figure 6 shown, in this standby state, a state is formed in which the engaging pin 22b at the rear end in the rotation direction of the lifting wheel 22 is engaged with the engaging tooth 13a at the lower end of the rack 13 from below.

[0083] As Figure 9 、 10 shown, when the driving tool 1 is pressed downward from the standby state, the contact rod 15 moves relatively upward, and when the trigger 8 is pulled upward, the driving operation starts. When the contact rod 15 moves relatively upward, the contact sensor 15c is turned on, and the operating portion 15d moves upward. As Figure 10 shown, when the trigger 8 is operated by being pulled, the idler wheel 8b moves upward and abuts against the operating portion 12a of the power-on switch 12. At the same time, the rotating top end portion of the idler wheel 8b abuts against the operating portion 15d of the contact rod 15 and is restricted from moving downward. Thereby, the operating portion 45b of the start state locking mechanism 40 is pushed upward by the idler wheel 8b. By the operating portion 45b being pushed upward, the operating portion 12a of the power-on switch 12 is pressed upward, thereby turning on the power-on switch 12 by an operating operation.

[0084] At this stage, by the operating portion 45b being pushed upward by the idler wheel 8b, the restricting member 41 of the start state locking mechanism 40 is displaced upward (in the direction opposite to the direction of engagement with the cam 23) against the compression spring 42. Therefore, in a state where the contact rod 15 is turned on and the trigger 8 is operated by being pulled, the restricting member 41 is held in a state of retracting in a direction away from the cam 23.

[0085] When the power-on switch 12 is turned on by an operating operation, the electric motor 32 starts and the lifting wheel 22 begins to rotate. AsFigure 11 As shown, when the lifting wheel 22 starts to rotate in the counterclockwise direction indicated by the arrow L in the figure, the engaging pin 22b at the rear end of the rotation direction is displaced upward. Thus, through the engagement with the engaging tooth 13a at the lower end of the rack 13, the driver 11 is lifted upward. By the upward lifting of the driver 11, the piston 4 moves to the upper end position.

[0086] At the stage where the piston 4 moves from the standby position to the upper end position, that is, before the engaging pin 22b at the rear end of the rotation direction is about to disengage from the engaging tooth 13a at the lower end, the on-region 23a of the cam 23 is in a state of being located below the restricting member 41 of the start state locking mechanism 40.

[0087] When the piston 4 moves to the upper end position, by the continuous rotation of the lifting wheel 22, the engagement between the engaging pin 22b at the rear end of the rotation direction and the engaging tooth 13a at the lower end of the rack 13 is disengaged (released). Thus, the engagement state between the lifting portion 20 and the driver 11 is released, and the piston 4 moves downward by the air pressure in the upper cylinder chamber 3a. At this stage, the retracting portion 22c of the lifting wheel 22 faces the rack 13, thereby preventing interference between the engaging tooth 13a and the engaging pin 22b. Thus, the driver 11 moves downward along the driving path 5a without being interfered by the lifting portion 20. One driving member N supplied from the magazine 6 into the driving path 5a is impacted by the piston 4 moving downward. The impacted driving member N is ejected from the ejection port 5b and driven into the driving material W.

[0088] In Figures 12 to 14 the state during driving is shown. The piston 4 moves to the lower end position, and the impact is absorbed by the lower end shock absorber 3b. As Figure 14 shown, at this stage, the engaging pin 22b at the foremost position in the rotation direction of the lifting wheel 22 enters below the uppermost engaging tooth 13a of the rack 13. In addition, the on-region 23a of the cam 23 is still located below the restricting member 41.

[0089] In Figure 12 , 13 the state where the trigger 8 is pulled is shown. After the driving operation, the pulling operation of the trigger 8 is released. Thus, the upward pressing of the action portion 45b by the idler 8b is released. However, at this stage, the start state locking mechanism 40 is in a locked state. That is, the on-region 23a of the cam 23 is located below the restricting member 41. Therefore, even if the upward push of the action portion 45b by the idler 8b is released, the restricting member 41 is engaged with the on-region 23a of the cam 23 and is restricted from displacing downward. Thus, since the downward displacement of the action portion 45b is restricted, the state of pressing the action portion 12a of the power supply switch 12, that is, the on-state of the power supply switch 12, can be maintained.

[0090] In this way, by activating the start state locking mechanism 40, after the ON operation of the trigger 8 is released, the ON state of the power switch 12 is maintained, and thus the start state of the electric motor 32 can be sustained. Accordingly, the lifting wheel 22 continues to rotate in the direction of arrow L in the figure.

[0091] After the ON operation of the trigger 8 is released, the electric motor 32 continues to start. As a result, the engaging pin 22b at the forefront of the rotation direction of the lifting wheel 22 engages with the engaging tooth 13a at the uppermost part of the rack 13. The electric motor 32 continues to start, and the lifting wheel 22 rotates in the direction of arrow L. As a result, the engaging pin 22b and the engaging teeth 13a of the rack 13 engage with each other in sequence. Thereby, the driver 11 and the piston 4 are lifted upward. In addition, the restricting member 41 engages with the ON region 23a of the cam 23, so that the ON state of the power switch 12 is sustained. Thereby, the start state of the electric motor 32 is sustained.

[0092] When the piston 4 returns to Figure 6 the standby position shown, the state where the engaging pin 22b at the rear end of the rotation direction of the lifting wheel 22 engages with the engaging tooth 13a at the lower end of the rack 13 from below is restored. At this stage, the facing portion of the restricting member 41 with respect to the cam 23 moves from the ON region 23a to the OFF region 23b.

[0093] When the facing portion of the restricting member 41 moves from the ON region 23a to the OFF region 23b, a state where the downward displacement of the restricting member 41 is allowed is achieved. Therefore, the restricting member 41 moves downward by the applied force of the compression spring 42 and the restoring force of the OFF position of the power switch 12 (the force acting on the OFF position of the operating portion 12a). Thereby, as Figure 6 shown, it is restored to the standby state where the restricting member 41 engages with the OFF region 23b (the released state of the start state locking mechanism 40).

[0094] In this way, the locked state of the start state locking mechanism 40 is released, so that the operating portion 12a of the power switch 12 returns to the OFF position. Thereby, the electric motor 32 stops, and a series of driving operations are completed.

[0095] The driving tool 1 according to the present embodiment has a function (mode switching function) of switching the driving operation mode to a so-called single-shot driving mode and a continuous firing driving mode. In the single-shot driving mode, after performing one driving operation, the next driving operation can be performed by disconnecting both the trigger 8 and the contact lever 15. The single-shot driving mode is also referred to as target driving, and an accurate driving operation can be reliably performed. In the continuous firing driving mode, the driving operation can be continuously performed by repeatedly performing the ON operation of the contact lever 15 while maintaining the ON operation state of the trigger 8. The continuous firing driving mode is also referred to as free driving, and multiple driving operations can be quickly performed.

[0096] As Figure 15 , 16 shown, a cylindrical mode switching lever 16 is installed at the left side of the tool body 10 and at the left end of the support shaft 8a of the trigger 8. A knob portion 16a extending in one circumferential direction is integrally provided on the left end surface of the mode switching lever 16. An eccentric support portion 17 is coupled to the right end portion of the support shaft 8a. The mode switching lever 16 and the eccentric support portion 17 are respectively rotatably supported by support wall portions 2c provided opposite to each other at the rear of the main body housing 2. The support shaft 8a is supported in a manner straddling the support wall portions 2c on the left and right through the mode switching lever 16 and the eccentric support portion 17.

[0097] The rotation axis of the mode switching lever 16 with respect to the support wall portion 2c coincides with the rotation axis of the eccentric support portion 17 with respect to the support wall portion 2c. The support shaft 8a is eccentrically coupled to the rotation axes of the mode switching lever 16 and the eccentric support portion 17. Therefore, when the mode switching lever 16 is rotated by grasping the knob portion 16a, the support shaft 8a moves parallel in the front-rear (radial) direction. As Figure 15 shown, when the knob portion 16a faces downward, as Figure 16 shown, the support shaft 8a is displaced parallel to the rear (user side). Thereby, the entire trigger 8 is displaced toward the user side. Thereby, the operation mode of the tool body 10 is switched to the single-shot driving mode.

[0098] When the mode switching lever 16 is rotated about 180° from the Figure 15 shown single-shot driving mode position, as Figure 20 shown, when the knob portion 16a faces upward, as Figure 21 shown, the support shaft 8a is displaced parallel to the front. Thereby, the entire trigger 8 is displaced away from the user side (front side). Thereby, the operation mode of the tool body 10 is switched to the continuous-shot driving mode. In this way, by reversely operating the mode switching lever 16 by about 180°, the support shaft 8a is displaced parallel back and forth to switch between the single-shot driving mode and the continuous-shot driving mode.

[0099] Figures 17 to 19 shows the operation state of the former single-shot driving mode. As Figure 17 shown, when the contact lever 15 is first turned on, it becomes a state where the operation portion 15d moves upward integrally and abuts against the lower surface of the rotating top side of the idler 8b. Thereby, it becomes a state where the displacement of the rotating top side of the idler 8b is restricted. In addition, at this stage, it becomes a state where the idler 8b abuts against the end portion of the retraction window 45c of the restricting arm 45. Therefore, as Figure 18As shown, when the trigger 8 is pulled upward thereafter, while the rotational top end of the idler wheel 8b is restricted from laterally downward displacement by the operation portion 15d, the support shaft 8c is displaced upward. As a result, the idler wheel 8b is displaced upward by a sufficient distance. By the upward displacement of the idler wheel 8b, the operation portion 45b of the restriction arm 45 is interposed therebetween, whereby the operation portion 12a of the energization switch 12 is pressed to the ON position. Thereby, the tool main body 10 performs a driving action.

[0100] As Figure 19 shown, in the single-shot driving mode, when the trigger 8 is first pulled upward, the state becomes such that the rotational top end side of the idler wheel 8b retreats from the movement path of the operation portion 15d of the contact lever 15. Therefore, even if the contact lever 15 is then turned on, the operation portion 15d does not abut against the idler wheel 8b but passes by from its side. Therefore, the rotational top end side of the idler wheel 8b does not displace, and thus the energization switch 12 is not turned on. Thereby, the turning-on operation of the contact lever 15 becomes ineffective and the driving action is not performed. This ineffective state can be canceled by releasing the pulling operation of the trigger 8.

[0101] Figure 22 and 23 shows the operation state of the latter continuous driving mode. As Figure 20 shown, when the knob portion 16a is reversely operated upward to switch the mode switching lever 16 to the continuous driving mode, as Figure 21 shown, the support shaft 8a is displaced forward, and the trigger 8 as a whole is displaced forward. Therefore, in the continuous driving mode, as Figure 22 shown, when the trigger 8 is first turned on and then, as Figure 23 shown, the contact lever 15 is turned on, the idler wheel 8b is pushed upward by the operation portion 15d of the contact lever 15, thereby turning on the energization switch 12. In the continuous driving mode, since the trigger 8 as a whole is displaced forward, even when the trigger 8 is first turned on, the state where the idler wheel 8b is located above the operation portion 15d can be maintained. Therefore, in the continuous driving mode, regardless of the operation order of the turning-on operation of the trigger 8 and the turning-on operation of the contact lever 15, in any case, the operation portion 15d always engages with the idler wheel 8b to turn on the energization switch 12. In this regard, as described above, in the single-shot driving mode, since the trigger 8 as a whole is displaced backward, when the trigger 8 is first turned on, the idler wheel 8b disengages from above the operation portion 15d (refer to Figure 19 ).

[0102] In this way, in the continuous driving mode, by maintaining the state of first turning on the trigger 8 and repeatedly turning on the contact lever 15, the driving action is repeated to perform continuous driving. In the continuous driving mode, if the contact lever 15 is first turned on and then the trigger 8 is pulled, the idler wheel 8b is pushed upward by the actuating portion 15d, turning on the power switch 12. Thus, the driving action (target driving) is performed by the tool main body 10. After the driving action, as described above, the trigger 8 is maintained in the turned-on state, the contact lever 15 is temporarily turned off, and the tool is moved to the next driving position and the contact lever 15 is turned on again to perform continuous driving.

[0103] In this way, the driving tool 1 according to the present embodiment has a function (mode switching function) of switching the driving action mode to a so-called single-shot driving mode and a continuous driving mode. The mode is switched by a simple operation of reversing the mode switching lever 16 provided on the right side portion of the tool main body 10 by approximately 180°. With this mode switching function, the driving tool 1 can be used in an optimal state in cooperation with various working methods. In this regard, the workability of the driving tool 1 can be improved.

[0104] According to the driving tool 1 configured as described above, by a mechanical structure including the start state locking mechanism 40 having the restricting member 41 and the cam 23 of the elevating portion 20, regardless of the turning-on operation of the trigger 8, the start state of the electric motor 32 is maintained after the driving action, and the driver 11 is returned to the standby position.

[0105] In this way, by the mechanical structure, the start state of the electric motor 32 can be maintained and the driver 11 can be returned to the standby position. Therefore, malfunction in the case of motor start control achieved by conventional electric control can be avoided in advance. In addition, the illustrated start state locking mechanism 40 of the mechanical structure is realized by the illustrated pneumatic spring type driving tool 1, rather than a mechanical spring type driving tool.

[0106] In addition, according to the illustrated structure, when the trigger 8 is turned on, the idler wheel 8b is pressed upward against the actuating portion 12a of the power switch 12 with the tip of the actuating portion 45b of the restricting arm 45 interposed therebetween. Thus, at the time point when the trigger 8 is turned on, the restricting member 41 is moved to the locking position. In this way, since the structure is such that the movement operation of the trigger 8 to the turned-on position is associated with the movement action of the restricting member 41 to the locking position, simplification of the structure for maintaining the turned-on state of the power switch 12 can be achieved compared to a structure without such an association. In the case of a structure without such an association, for example, by separately providing the engaging portion for the restricting portion and the portion where the idler wheel 8b of the trigger 8 abuts on the actuating portion 12a of the power switch 12, a structure in which the actions of the two are independent can be achieved.

[0107] Moreover, by coaxially arranging the rotary cam 23 with the lifting wheel 22, the structure of the lifting portion 20 and the starting state locking mechanism 40 can be made compact.

[0108] In addition, a large-diameter connection region 23a and a small-diameter disconnection region 23b are provided along the circumferential direction of the cam 23. By the rotation of the cam 23, the connection region 23a and the disconnection region 23b are reliably opposed to the restricting member 41, and the movement of the restricting member 41 to the locking position and the unlocking position can be reliably performed at an appropriate timing.

[0109] In addition, in the direction of connecting the trigger 8 and the driver 11 (the direction in which the trigger 8 and the driver 11 pass), that is, when viewed from the side, the restricting member 41 and the cam 23 are arranged between the trigger 8 and the driver 11. Therefore, the restricting member 41 and the cam 23 are compactly arranged at a position where it is easy to ensure a relatively idle space. Thereby, the compactification of the driving tool 1 can be achieved.

[0110] Moreover, in the illustrated structure, the movement of the restricting member 41 is guided by guide rollers (lateral rollers 44, first roller 43b, and second roller 43c). By these guide rollers, even in a state where the restricting member 41 is subjected to a lateral pressing force from the cam 23, it can smoothly move between the locking position and the unlocking position without twisting.

[0111] In addition, according to the illustrated driving tool 1, regardless of the operation state of the trigger 8, by using a mechanical structure to control the starting state of the electric motor 32, malfunction can be avoided. In addition, it has a function of switching between single-shot driving and continuous-shot driving modes. Thereby, the workability of the driving tool 1 can be further improved.

[0112] Various changes can be made to the above-described embodiments. For example, although a structure in which the restricting member 41 is moved to the locking position by the closing operation of the trigger 8 is illustrated, it can also be configured such that, differently from the closing operation of the trigger 8, the restricting member 41 is engaged with the connection region 23a (pressed) by the rotation of the cam 23 and moves to the locking position. In the case of the above structure, by the closing operation of the trigger 8, the operating portion 45b of the restricting arm 45 is engaged with the operating portion 12a of the power-on switch 12 that has already been in the on position at a position different from the idle pulley 8b (for example, a position closer to the base of the operating portion 12a). Thereby, after the closing operation of the trigger 8 is released, the movement of the operating portion 12a of the power-on switch 12 to the off position is also restricted, and the on state of the power-on switch 12 is maintained.

[0113] In the elevating unit 20, a structure in which the engaging pin 22b engages with the engaging tooth 13a of the rack 13 is illustrated, but a structure in which a gear tooth engages with the engaging tooth 13a instead of the engaging pin 22b may also be used.

[0114] Although the driving tool 1 for driving a nail as the driving member N is illustrated, the driving tool for driving a stapler can also apply the illustrated elevating unit 20 and the starting state locking mechanism 40.

Claims

1. A driving tool, characterized in that, It has a piston, a driver, a lifting wheel, an electric motor, a trigger, a power-on switch, a limiting member and a cam, wherein, The piston is installed inside the cylinder in a manner that it can reciprocate up and down; The driver is combined with the piston and moves downward in the driving-in direction; The lifting wheel meshes with the rack of the driver; The electric motor rotates the lifting wheel; The trigger can be moved to the on position to start the electric motor; The power-on switch becomes in the on state to power on the electric motor through the trigger in the on position; The limiting member can move between a locking position and an unlocking position, wherein the locking position is the position where the limiting member holds the power-on switch in the on state, and the unlocking position is the position where the limiting member allows the power-on switch to become in the off state; The cam is structured to be linked with the lifting wheel and has a contact area and a disconnection area. In the contact area, it interferes with the limiting member and holds the limiting member in the locking position. In the disconnection area, it allows the limiting member to move to the unlocking position, Through the on operations of both the trigger and the contact rod, the operating portion of the contact rod engages with the idle wheel of the trigger, thereby turning on the power-on switch to perform the driving-in operation, The driving-in operation can be switched between a single-shot driving mode and a continuous-shot driving mode, In the single-shot driving mode, when the contact rod is operated to be on in the on-operation state of the trigger, the engagement between the operating portion and the idle wheel is avoided, and the power-on switch is not turned on; In the continuous-shot driving mode, regardless of the sequence of the on-operation of the trigger and the on-operation of the contact rod, the operating portion always engages with the idle wheel, and the power-on switch is turned on, The single-shot driving mode and the continuous-shot driving mode are switched by changing the position of the trigger.

2. The driving tool according to claim 1, characterized in that, Through the trigger moving to the on position, the limiting member moves to the locking position.

3. The driving tool according to claim 1 or 2, characterized in that, The cam is arranged to be able to rotate coaxially with the lifting wheel.

4. The driving tool according to claim 3, characterized in that, The contact area of the cam extends in a manner that it is at a first distance from the rotation center in the radial direction, The disconnection area of the cam extends in a manner that it is at a second distance closer to the rotation center than the first distance.

5. The driving tool according to claim 4, characterized in that, The contact area of the cam extends such that during the driver moving from the lower moving-end position to a specified position towards the standby position, the contact area of the cam interferes with the limiting member.

6. The driving tool according to claim 1 or 2, characterized in that, In the direction connecting the trigger and the driver, the limiting member and the cam are located between the trigger and the driver.

7. The driving tool according to claim 1 or 2, characterized in that, It has a guide roller for guiding the movement of the limiting member.

8. The driving tool according to claim 7, characterized in that, When the cam applies a force to the limiting member in a direction orthogonal to the moving direction of the limiting member, the guide roller is arranged on the side portion of the limiting member in a manner facing the force.

9. The driving tool according to claim 7, characterized in that, The guide roller is configured to guide the limiting member on at least one side in a direction orthogonal to the moving direction of the limiting member and parallel to the rotation axis of the cam.

10. The driving tool according to claim 8, characterized in that, The guide roller is configured to guide the limiting member on at least one side in a direction orthogonal to the moving direction of the limiting member and parallel to the rotation axis of the cam.

11. The driving tool according to claim 1, characterized in that, The limiting member is located between the energizing switch and the idler pulley. Through the closing operation of the trigger and the contact rod, the limiting member is pushed by the idler pulley and moves to the locking position.

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