Driving tool

Abstract

To provide a driving tool which achieves good repairability and is provided compactly.SOLUTION: A driving tool 1 has a magazine 30 which supplies driving tools to a driving nose part 2 of a tool body 10. The driving tool 1 has a contact arm 4 which may protrude from the driving nose part 2 of the tool body 10. The driving tool 1 has an interlocking lever 37 which integrally moves with the contact arm 4 when the contact arm 4 is pressed to the tool body 10 side. The driving tool 1 has a U-shaped leaf spring 41 which includes a first piece 42 configured to be pressed by the interlocking lever 37, a second piece 43 facing the first piece 42, and a curved part 44 connecting the first piece 42 with the second piece 43 and which is disposed in the magazine 30. The driving tool 1 has a switch 38 which is disposed at the magazine 30 and pressed by the second piece 43 to emit an electric signal.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to a driving tool for driving a driving tool such as a nail or staple into a workpiece such as wood. [Background technology]

[0002] The driving tool has a driving nose portion at the bottom of the tool body, the nose portion having an ejection port for ejecting the driving tool. The driving tool has a contact arm that can move up and down relative to the driving nose portion. Typically, the tip of the contact arm protrudes downward beyond the lower end of the driving nose portion. When the tip of the contact arm is pressed against the material to be driven, the contact arm retracts upward to a position substantially the same as the lower end of the driving nose portion. The driving tool has a detection switch for the contact arm that detects the upward movement of the contact arm.

[0003] The driving tool has a trigger that is pulled, for example, by a user's finger. By pulling the trigger when the detection switch is in the on state, the driving mechanism of the driving tool is activated. This allows the driving tool to be ejected from the ejection port. When the detection switch is in the off state, the driving mechanism of the driving tool is not activated. Therefore, the driving tool is not ejected from the ejection port.

[0004] In conventional driving tools, the detection switch is housed, for example, in the main body housing of the tool body. In order to replace the detection switch, the main body housing needs to be disassembled, and there is room for improvement in order to improve repairability. In addition, an intervening member such as a leaf spring is provided between the contact arm and the detection switch to prevent the contact arm from directly contacting the detection switch. Therefore, the leaf spring needs to be attached to the main body housing together with the detection switch. Therefore, there is room for improvement in order to make the main body housing more compact.

[0005] Conventionally, as described in, for example, Patent Document 1, a structure has been considered in which a detection switch is attached to a magazine that houses driving tools. The magazine is disposed below the main housing and behind the driving nose. By attaching the detection switch to the magazine, it is possible to replace the detection switch without disassembling the main housing. However, further improvements are required to arrange the leaf spring and the like and to compactify the driving tool including the magazine. Further improvements are also required to provide a compact cover that covers the detection switch attached to the magazine. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2021-88056 Summary of the Invention [Problem to be solved by the invention]

[0007] Therefore, there is a need for a driving tool that is easy to repair and can be installed compactly. [Means for solving the problem]

[0008] According to one feature of the present disclosure, a driving tool has a magazine that supplies driving tools to an end of a tool body. The driving tool has a contact arm that can protrude from an end of the tool body. The driving tool has an interlocking lever that moves integrally with the contact arm when the contact arm is pressed toward the tool body. The driving tool has a first piece that is pressed by the interlocking lever, a second piece that faces the first piece, and an elastic member that has a connecting portion that connects the first piece and the second piece and is disposed in the magazine. The driving tool has a switch that is disposed in the magazine and is pressed by the second piece to generate an electrical signal.

[0009] Therefore, a switch that detects the movement of the contact arm can be provided on the magazine. Therefore, for example, the switch can be replaced without disassembling the main body housing that covers the tool body. This improves the repairability of the driving tool. Moreover, the interlocking lever moves integrally with the contact arm. An elastic member is interposed between the interlocking lever and the switch. The elastic member is also provided on the magazine. Therefore, the ease of assembly of the switch to the magazine and the ease of repair when replacing the switch can be improved. In addition, the connecting portion of the elastic member can be attached to the magazine to support the elastic member. Therefore, there is no need to provide an extra portion of the elastic member that engages with the magazine. This allows the elastic member to be provided compactly. Therefore, the magazine to which the elastic member is attached can be made compact. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a right side view of the driving tool according to the first embodiment of the present disclosure when the contact arm is in the off position. [Diagram 2] FIG. 13 is a right side view of the driving tool when the contact arm is in the on position. [Diagram 3] FIG. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Diagram 5] FIG. 2 is an exploded perspective view of the magazine and the contact arm. [Figure 6] FIG. 13 is a right side view of the driving tool with the cover removed and the contact arm in the off position. [Figure 7] FIG. 13 is a right side view of the driving tool with the cover removed and the contact arm in the on position. [Figure 8] FIG. 11 is a front view of a driving tool according to a second embodiment of the present disclosure with a main body housing removed. [Figure 9] 1 is a left side view of the driving tool with the left half of the main body housing removed. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] According to another feature of the present disclosure, the connecting portion is formed as a curved portion. A boss is provided on the magazine, located on the inner periphery side of the curved portion and rotatably supporting the elastic member. Therefore, the curved portion of the elastic member can be assembled using the boss of the magazine. This improves the ease of assembly and repair of the driving tool. In addition, the elastic member is supported rotatably around the boss on the inner periphery side. Therefore, the elastic member can be supported while suppressing the width of the elastic member and the protruding length of the boss. This allows the magazine in which the elastic member is assembled to be made compact.

[0012] According to another feature of the present disclosure, the driving tool has a cover that covers the switch. A screw that attaches the cover to the magazine is screwed into the boss. Therefore, the switch can be replaced or the like by simply removing the cover from the magazine. This improves repairability. In addition, the boss serves both as a portion that supports the elastic member and a portion into which the screw is screwed. Therefore, the magazine equipped with the boss can be provided in a compact manner.

[0013] According to another feature of the present disclosure, the magazine is provided with a positioning rib that is located on the outer periphery of the curved portion of the elastic member and positions the elastic member. Therefore, the elastic member is supported by the boss on the inner periphery and by the positioning rib on the outer periphery. This stabilizes the support structure of the elastic member. This allows the switch to more reliably detect the movement of the contact arm via the elastic member.

[0014] According to another feature of the present disclosure, the elastic member has a substantially uniform width over its entire length. Here, the width direction refers to the direction in which the first piece and the second piece face each other. Therefore, the elastic member can be compactly provided in the width direction while maintaining a predetermined elasticity. Therefore, the magazine to which the elastic member is attached can be compactly provided in the width direction of the elastic member. Also, the elastic member can be provided by bending a flat plate-shaped member. Therefore, the man-hours required for forming the elastic member can be reduced.

[0015] According to another feature of the present disclosure, the elastic member has a multi-stage spacing between the first piece and the second piece. Therefore, the overall length of the elastic member from the tip of the first piece to the tip of the second piece can be increased. This increases the amount of deformation of the elastic member. This increases the accuracy with which the switch detects the movement of the contact arm. In addition, by providing a multi-stage spacing between the first piece and the second piece, a relief portion can be provided in the elastic member. The relief portion suppresses interference with a housing portion that rotatably houses the elastic member. Therefore, the movement of the contact arm can be smoothly transmitted to the switch via the elastic member.

[0016] According to another feature of the present disclosure, the driving tool is attached to a magazine and has a cover including a widened portion that covers the switch and a narrow portion that extends from the widened portion and is narrower than the widened portion. Therefore, the widened portion is provided with a width necessary to cover the switch, and the narrow portion is provided with a width that is narrower than the widened portion. This makes it possible to reduce the covering area of ​​the cover. This allows the magazine to be compactly fitted with the cover.

[0017] According to another feature of the present disclosure, the driving tool has a lead wire extending from the switch. The driving tool has a connector to which an end of the lead wire is connected. The lead wire and the connector are covered by a narrow portion of the cover. Therefore, the switch, the lead wire, and the connector can be exposed simply by removing the cover from the magazine. The switch, the lead wire, and the connector can be covered simply by attaching the cover to the magazine. Therefore, repairability can be improved when replacing the switch, etc.

[0018] According to another feature of the present disclosure, the switch has a protruding pin that is pressed by the elastic member in a direction parallel to the movement direction of the contact arm relative to the tool body. Therefore, the movement direction of the contact arm and the direction in which the protruding pin is pressed by the elastic member are generally the same. Therefore, when the movement force of the contact arm is converted into the operating force of the protruding pin via the elastic member, the loss of force can be suppressed. This can increase the accuracy with which the switch detects the movement of the contact arm.

[0019] According to another feature of the present disclosure, the driving tool has a piston that is moved by gas pressure. The driving tool has a driver that moves together with the piston to strike the driving tool. Therefore, it is possible to improve the repairability of the so-called gas spring type driving tool and to prevent the tool body from becoming large.

[0020] Next, an embodiment of the present disclosure will be described with reference to Figs. 1 to 7. As an example of the driving tool 1, a gas spring type driving tool that utilizes gas pressure in a pressure accumulator as a thrust for driving a driving tool is shown. In the following description, the driving direction of the driving tool is the downward direction, and the opposite driving direction is the upward direction. A user of the driving tool 1 is generally located on the left side of the driving tool 1 in Fig. 1. The side in front of the user is the rear direction, and the back side opposite the front side is the front direction. The left and right directions are based on the user.

[0021] As shown in Figs. 1 to 4, the driving tool 1 has a tool body 10. The tool body 10 has a configuration in which a cylinder 12 is accommodated in a generally cylindrical main body housing 11. A piston 14 is accommodated in the cylinder 12 so as to be capable of vertical reciprocating motion. An upper portion of the cylinder 12 located above the piston 14 is in communication with a pressure accumulator chamber 13. A compressed gas such as air is sealed in the pressure accumulator chamber 13. The gas pressure in the pressure accumulator chamber 13 acts as a thrust that urges the upper surface of the piston 14 downward.

[0022] As shown in Fig. 4, the right part of the accumulator chamber 13 is connected to an air chamber 13a extending downward. The air chamber 13a extends downward along the right side surface of the cylinder 12. The air chamber 13a is provided above a lift mechanism 22 described later, overlapping with the lift mechanism in the left-right direction. The air chamber 13a has a sector-shaped cross section that circumferentially covers the right part of the cylinder 12 when viewed from the top-bottom direction, for example. By providing the air chamber 13a to the right of the cylinder 12, it is possible to increase the capacity of the accumulator chamber 13 including the air chamber 13a while preventing the tool body 10 from becoming large in the top-bottom direction.

[0023] As shown in Figs. 3 and 4, a driving nose 2 having a driving passage 3 is provided at the bottom of the tool body 10. The driving nose 2 corresponds to the end of the tool body 10 in this disclosure. The driving passage 3 extends in the vertical direction and communicates with the bottom of the cylinder 12. A magazine 30 is connected to the rear of the driving nose 2. A plurality of driving tools N extending in the vertical direction and aligned in the front-rear direction are loaded into the magazine 30. The driving tools N are bonded to each other while aligned in the front-rear direction. The driving tools N are supplied one by one from the magazine 30 forward toward the driving passage 3.

[0024] As shown in Figures 1 and 2, the driving nose section 2 is provided with a contact arm 4 that can slide up and down. The contact arm 4 is biased downward toward an OFF position C1. When the contact arm 4 comes into contact with the workpiece W to be driven, it moves upward toward an ON position C2 against the biasing force. The structure of the contact arm 4 and the structure for detecting the movement of the contact arm 4 will be described in detail later.

[0025] As shown in Figures 1 to 3, a grip 5 that is held by a user is provided at the rear of the tool body 10, extending in the front-rear direction. A trigger 6 that is operated by a user by pulling it with a fingertip is provided on the underside of the front part of the grip 5. A trigger switch 6a that switches from an OFF state to an ON state in response to pulling the trigger 6 is provided inside the grip 5. When the contact arm 4 is pressed against the workpiece W and moves to the ON position C2, pulling the trigger 6 becomes effective.

[0026] As shown in Figs. 1 to 3, a battery attachment section 7 extending in the vertical direction is provided on the rear surface of the grip 5. A battery pack 8 can be removably attached to the battery attachment section 7. The battery pack 8 can be removed from the battery attachment section 7 and repeatedly charged and used with a separately prepared charger. The battery pack 8 can also be used as a power source for other power tools. The battery pack 8 supplies power to an electric motor 20, which will be described later, and the like.

[0027] As shown in Figs. 1 to 3, the main body housing 11 has a substantially cylindrical drive unit case 11a extending in the front-rear direction above the magazine 30. The rear part of the drive unit case 11a is connected to the lower part of the battery attachment part 7. The grip 5, the battery attachment part 7, and the drive unit case 11a cooperate to form a loop shape. In front of the battery attachment part 7, a controller 9 is provided which is housed in a shallow rectangular box-shaped case. The controller 9 is housed in the main body housing 11 in an orientation in which it extends substantially in the vertical direction and has a thickness direction in the front-rear direction. The controller 9 mainly controls the driving of the electric motor 20.

[0028] As shown in Figures 3 and 4, a driver 15 that is long vertically is connected to the underside of the piston 14. The lower part of the driver 15 enters the driving passage 3. The driver 15 moves downward by the gas pressure in the pressure accumulator chamber 13 acting on the upper surface of the piston 14. A tip 15b located at the lower end of the driver 15 strikes the head Na of one driving tool N supplied to the driving passage 3 when the driver 15 moves to the driving position. The struck driving tool N is ejected from an ejection port 3a that opens at the lower end of the driving passage 3. The ejected driving tool N is driven into the workpiece W. A substantially cylindrical cushion 16 is provided at the bottom of the cylinder 12 to absorb the impact of the piston 14 at the bottom dead point.

[0029] As shown in Fig. 4, a plurality of rack teeth (engaged portions) 15a protruding to the right are provided on the right side of the driver 15. In this embodiment, six rack teeth 15a are arranged side by side in the longitudinal direction (up-down direction) of the driver 15. Each rack tooth 15a is provided in a substantially triangular shape with its bottom facing the driving direction (downward). The bottom of the rack tooth 15a engages with an engaging portion 24 of the lift mechanism 22, which will be described later.

[0030] As shown in FIG. 3, the drive unit case 11a accommodates an electric motor 20 as a drive source. The electric motor 20 is accommodated in a position in which the motor axis extends in the front-rear direction. The electric motor 20 is started by operating the contact arm 4 and the trigger 6, using a battery pack 8 as a power source. A planetary reduction mechanism 21 is provided in front of the electric motor 20. The planetary reduction mechanism 21 uses a three-row planetary gear train. A lift mechanism 22 that moves the driver 15 upward is provided in front of the planetary reduction mechanism 21. The electric motor 20, the planetary reduction mechanism 21, and the lift mechanism 22 are arranged side by side on the motor axis. The rotational drive of the electric motor 20 is reduced in speed by the planetary reduction mechanism 21 and transmitted to the lift mechanism 22.

[0031] As shown in FIG. 4, the lift mechanism 22 is provided on the right side of the driving nose portion 2. The lift mechanism 22 has a wheel 23 that can rotate around an axis extending in the front-rear direction. The wheel 23 can rotate in a counterclockwise direction when viewed from the front, and clockwise rotation is restricted. A plurality of engagement portions 24 are attached along the outer periphery of the wheel 23. In this embodiment, for example, six engagement portions 24 are provided. The engagement portions 24 use cylindrical shaft members (pins) that extend in the front-rear direction. The engagement portions 24 are arranged at intervals in the circumferential direction of the wheel 23. As the wheel 23 rotates, the engagement portions 24 move around the center of rotation of the wheel 23.

[0032] As shown in Fig. 4, the left part of the wheel 23 enters the driving passage 3 through a window 11b provided in the right part of the driving passage 3. Each engagement portion 24 of the wheel 23 engages with the bottom of the rack teeth 15a of the driver 15 in the driving passage 3. With at least one of the engagement portions 24 engaged with the bottom of the rack teeth 15a, the wheel 23 rotates counterclockwise. This moves the driver 15 and the piston 14 upward. The piston 14 is returned upward by the lift mechanism 22, thereby increasing the gas pressure in the pressure accumulator chamber 13.

[0033] As shown in Figs. 1 to 3, the magazine 30 is provided in a generally rectangular box shape extending straight rearward from the driving nose portion 2. The magazine 30 can accommodate a plurality of driving tools N (see Fig. 4). The driving tools N are, for example, nails called finishing nails. The front end of the magazine 30 opens toward the driving passage 3 in front and communicates with the driving passage 3. A pusher 35 is provided inside the magazine 30 to supply the driving tools N to the driving passage. The pusher 35 is provided in a flat plate shape extending in the up-down and front-rear directions. The pusher 35 is urged forward by a compression spring (not shown) provided inside the magazine 30. The front surface 35a of the pusher 35 pushes the driving tools N accommodated in the front toward the driving passage 3.

[0034] As shown in Figs. 1, 2 and 5, the contact arm 4 is provided on a plate-like member extending generally in the vertical direction. A tip 4a that abuts against the workpiece W is provided at the lower end of the contact arm 4. The contact arm 4 extends upward from the tip 4a to both the left and right sides of the driving nose 2. The contact arm 4 has an adjuster connection part 4b on the right side of the driving nose 2. The adjuster connection part 4b extends upward from the tip 4a, bends in a U-shape at the upper end, and extends downward. The tip of the adjuster connection part 4b is bent backward and has a through hole that penetrates in the vertical direction. The lower part of the rotation shaft 36a of the adjuster 36 described later is inserted into the through hole of the adjuster connection part 4b.

[0035] As shown in Figures 1, 2 and 5, the driving tool 1 has an adjuster 36 on the front right of the magazine 30. The adjuster 36 is provided in a cylindrical shape. The adjuster 36 has a rotating shaft 36a extending in the vertical direction. A lower part of the rotating shaft 36a is rotatably supported by the adjuster connecting part 4b of the contact arm 4. An upper part of the rotating shaft 36a is rotatably supported by an adjuster support part 31 provided on the magazine 30. The adjuster support part 31 protrudes rightward from the front part of the right side wall of the magazine 30. A through hole is provided in the center of the adjuster support part 31, which passes through in the vertical direction so as to be able to axially support the rotating shaft 36a.

[0036] As shown in Figs. 1, 2 and 5, the driving tool 1 has an interlocking lever 37 on the front right side of the magazine 30. The interlocking lever 37 extends in a substantially flat shape along the right side wall of the magazine 30. An adjuster connecting portion 37a is provided at the upper end of the interlocking lever 37. The adjuster connecting portion 37a has a through hole that is bent to the right and penetrates in the vertical direction. The upper portion of the rotating shaft 36a of the adjuster 36 is inserted into the through hole of the adjuster connecting portion 37a. A compression spring 36b is provided between the adjuster connecting portion 37a and the adjuster support portion 31 in the vertical direction. The compression spring 36b urges the interlocking lever 37, the adjuster 36 and the contact arm 4 downward relative to the magazine 30. The contact arm 4 is normally located in the OFF position C1 by the urging force of the compression spring 36b. The interlocking lever 37 moves vertically together with the contact arm 4 and the adjuster 36 between the OFF position C1 and the ON position C2.

[0037] 6 and 7, the adjuster 36 is integral with the rotating shaft 36a and can rotate around the axis of the rotating shaft 36a. When the adjuster 36 is rotated, the adjuster connection part 4b of the contact arm 4 moves up and down relative to the adjuster connection part 37a of the interlocking lever 37. This makes it possible to adjust the vertical position of the contact arm 4. For example, when the contact arm 4 is in the OFF position C1, the downward protruding length of the tip 4a relative to the injection port 3a can be changed.

[0038] 5 to 7, a rearwardly extending contact portion 37b is provided at the rear end of interlocking lever 37. Contact portion 37b is provided at a position offset to the right from a main body portion of interlocking lever 37 conforming to the right side wall of magazine 30.

[0039] As shown in Figs. 5 to 7, the driving tool 1 has a switch 38 that detects the upward and downward movement of the contact arm 4. The switch 38 has a rectangular box-shaped switch body 38a. The switch 38 has a protruding pin 38b that protrudes downward from the switch body 38a. The protruding pin 38b overlaps with the abutting portion 37b in the front-rear direction. The protruding pin 38b is biased downward relative to the switch body 38a. The protruding pin 38b can be pushed upward. When the protruding pin 38b is pushed, the switch 38 is turned on and transmits an electric signal. When the protruding pin 38b is not pressed, the switch 38 is turned off and does not transmit an electric signal. The switch 38 has a rectangular box-shaped case 38c that covers the rear of the switch 38.

[0040] As shown in Figs. 5 to 7, a lead wire 45 extends rearward from the rear end of the switch body 38a. A male connector 46a is connected to the rear end of the lead wire 45. The male connector 46a is engageable with a female connector 46b at the rear. The male connector 46a and the female connector 46b engage with each other to form a pair of connectors 46. The lead wire 45 extends rearward from the rear end of the female connector 46b. An electrical signal from the switch 38 is transmitted to the rear lead wire 45 via the lead wire 45 and the connector 46.

[0041] As shown in Figs. 5 to 7, a switch accommodating section 32 is provided on the right side wall of the magazine 30. The switch accommodating section 32 is divided into a substantially rectangular box shape by a rib extending rightward from the right side wall of the magazine 30. The switch accommodating section 32 opens downward, rightward, and rearward. The switch accommodating section 32 is provided with a size that allows a case 38c to be fitted therein. The switch accommodating section 32 can accommodate a switch 38 by inserting it, for example, from right to left. A slit-shaped opening 32a penetrating in the front-rear direction is provided at the rear of the switch accommodating section 32. A lead wire 45 extending rearward from the switch 38 can be extended from the opening 32a to the connector accommodating section 39 at the rear.

[0042] As shown in Figs. 5 to 7, a connector accommodating section 39 is provided on the right side wall of the magazine 30. The connector accommodating section 39 is partitioned into a generally rectangular box shape that is long in the front-rear direction by a rib extending rightward from the right side wall of the magazine 30. The front end of the connector accommodating section 39 is connected to the switch accommodating section 32 through an opening 32a. The connector accommodating section 39 opens to the right. The rear end of the connector accommodating section 39 is opened upward and connected to the inside of the main body housing 11. The connector accommodating section 39 can accommodate a connector 46 and a lead wire 45, for example, by inserting them from right to left. At least one of the male connector 46a and the female connector 46b is held in the connector accommodating section 39 by the rib. The lead wire 45 extending rearward from the connector 46 is inserted into the main body housing 11 and electrically connected to the controller 9.

[0043] As shown in Figs. 5 to 7, the driving tool 1 has a U-shaped leaf spring 41 as an elastic member interposed between the interlocking lever 37 and the switch 38. The U-shaped leaf spring 41 is provided by bending a flat member into a U-shape. The U-shaped leaf spring 41 has a flat first piece 42 extending in the front-rear direction. The U-shaped leaf spring 41 has a substantially flat second piece 43 extending in the front-rear direction. The leaf spring 41 has a curved portion 44 as a connecting portion that connects the rear end of the first piece 42 and the rear end of the second piece 43 in a U-shape. The U-shaped leaf spring 41 is provided with a substantially uniform left-right width over the entire length from the tip of the first piece 42 to the tip of the second piece 43. The second piece 43 extends forward longer than the first piece 42.

[0044] As shown in Figs. 5 to 7, a stepped portion 43a is provided at approximately the center of the second piece 43 in the front-rear direction. The second piece 43 extends approximately parallel to the first piece 42 in front of or behind the stepped portion 43a. A first vertical distance D1 is provided between the first piece 42 and a region in front of the stepped portion 43a of the second piece 43. A second vertical distance D2 smaller than the first distance D1 is provided between the first piece 42 and a region in rear of the stepped portion 43a of the second piece 43. In this manner, the distance between the first piece 42 and the second piece 43 is provided to form multiple steps.

[0045] 5 to 7, a boss 33 and a positioning rib 34 for positioning and supporting the U-shaped leaf spring 41 are provided on the right side wall of the magazine 30. The boss 33 is provided in a cylindrical shape protruding rightward from the right side wall of the magazine 30. The boss 33 is provided with an outer diameter following the inner peripheral surface of the curved portion 44 of the U-shaped leaf spring 41. The boss 33 is provided with a screw hole 33a extending leftward from the right end. The positioning rib 34 is provided in a plate shape protruding rightward from the right side wall of the magazine 30 behind the boss 33.

[0046] 5 to 7, a distance approximately equal to the thickness of the curved portion 44 is provided between the boss 33 and the positioning rib 34 in the front-rear direction. The curved portion 44 is inserted between the boss 33 and the positioning rib 34. The boss 33 abuts against the inner peripheral surface of the curved portion 44. The positioning rib 34 abuts against the outer peripheral surface of the curved portion 44. As a result, the U-shaped leaf spring 41 is restricted from moving in the front-rear direction and is supported so as to be rotatable up and down around the axis of the boss 33.

[0047] As shown in FIGS. 6 and 7, the first piece 42 can abut against the abutment portion 37b of the interlocking lever 37. The abutment portion 37b abuts against the approximate center of the first piece 42 in the left-right direction. The second piece 43 can abut against the protruding pin 38b of the switch 38. The protruding pin 38b abuts against the approximate center of the second piece 43 in the left-right direction. When the contact arm 4 is located in the lower OFF position C1, the interlocking lever 37 is also located downward. At this time, the abutment portion 37b is spaced downward from the first piece 42. Although the second piece 43 abuts against the protruding pin 38b, it does not push the protruding pin 38b upward. Therefore, the switch 38 is in the OFF state. When the switch 38 is in the OFF state, pulling the trigger 6 is ineffective. When the tip 4a of the contact arm 4 is pressed against the workpiece W (see FIG. 2), the contact arm 4 and the interlocking lever 37 move from the OFF position C1 to the ON position C2 against the biasing force of the compression spring 36b.

[0048] As shown in Fig. 7, when the contact arm 4 and the interlocking lever 37 move upward to the ON position C2, the abutment portion 37b presses the first piece 42 upward from below. The U-shaped leaf spring 41 rotates upward around the boss 33. The second piece 43 tilts upward due to the rotation of the U-shaped leaf spring 41 and presses the protruding pin 38b upward. As a result, the switch 38 is switched to the ON state. When the switch 38 is in the ON state, an electric signal is sent to the controller 9, and the pulling operation of the trigger 6 is enabled.

[0049] 1, 2 and 5, the driving tool 1 has a cover 47 that can be attached to the right side wall of the magazine 30. The cover 47 has a rectangular plate-shaped widened portion 47a. The widened portion 47a covers the switch 38 housed in the switch housing portion 32 and the U-shaped leaf spring 41 supported by the boss 33 and the positioning rib 34 from the right side.

[0050] As shown in Figs. 1, 2 and 5, the cover 47 has a narrow portion 47b extending rearward from the upper rear end of the wide portion 47a. The narrow portion 47b is narrower in vertical width than the wide portion 47a and extends longer in the front-rear direction. The narrow portion 47b covers the lead wire 45 and the connector 46 housed in the connector housing portion 39 from the right side. The cover 47 has an adjuster cover 47c extending forward from the upper front end of the wide portion 47a. The adjuster cover 47c is narrower in vertical width than the wide portion 47a. The adjuster cover 47c is provided in an arc shape following the outer peripheral surface of the adjuster 36. The adjuster cover 47c covers the compression spring 36b, the upper portion of the rotating shaft 36a and the upper portion of the adjuster 36 from the right side.

[0051] 1, 2 and 5, the cover 47 is screwed to the right side wall of the magazine 30 with a plurality of screws 48. In this embodiment, the cover 47 is screwed to the magazine 30 at three locations: the lower portion of the widened portion 47a, the rear portion of the narrowed portion 47b, and the connecting portion between the adjuster cover 47c and the widened portion 47a, by being inserted through holes 47d. The screws 48 at the lower portion of the widened portion 47a are screwed into threaded holes 33a provided in the boss 33. The boss 33 serves both as a fastening portion for the cover 47 and as a support portion for the U-shaped leaf spring 41. The cover 47 screwed to the magazine 30 is approximately flush with the right end of the magazine 30.

[0052] Next, a series of steps of the driving operation of the driving tool 1 will be described with reference to Figs. 1 to 4, 6, and 7. Figs. 3 and 4 show the driver 15 in a standby state. The driver 15 in the standby state stops at a standby position slightly below the top dead center. When the driver 15 is in the standby position, the bottom surface of the lowest rack tooth 15a and the engagement portion 24 of the lift mechanism 22 are engaged. When the tip 4a of the contact arm 4 is pressed against the workpiece W in the standby state, the contact arm 4 and the interlocking lever 37 move from the OFF position C1 to the ON position C2 against the biasing force of the compression spring 36b. The switch 38 is pushed by the U-shaped leaf spring 41, which is pushed by the interlocking lever 37 and rotated upward, and is turned on. The controller 9 starts the electric motor 20 when it receives an electric signal indicating that the switch 38 is turned on and the trigger 6 is pulled.

[0053] When the electric motor 20 is started, the wheel 23 of the lift mechanism 22 rotates. The engagement portion 24 that is engaged with the bottom surface of the lowest rack tooth 15a moves the lowest rack tooth 15a upward. This causes the driver 15 to move upward from the standby position to the top dead center.

[0054] When the driver 15 reaches the top dead center and reaches a state immediately before driving, the engaging portion 24 leaves the bottom of the lowest rack tooth 15a. As a result, the driver 15 is urged downward by the gas pressure in the pressure accumulator chamber 13 that was applied to the piston 14. Before the driver 15 stops at the standby position, the driving passage 3 is supplied with one driving tool N at the forefront from the magazine 30. The tip 15b of the driver 15 moves downward in the driving passage 3 and strikes the head Na of one driving tool N. When the driver 15 moves downward, all the engaging portions 24 are retracted to the right of the driving passage 3. Therefore, interference between the rack tooth 15a of the driver 15 moving downward and the engaging portion 24 is avoided, and a smooth driving operation is performed.

[0055] The wheel 23 continues to rotate while the driver 15 is moving downward and even after it reaches the bottom dead center. When the driver 15 is at the bottom dead center, the wheel 23 rotates to a predetermined rotation angle, and one of the engagement parts 24 engages with the bottom of the uppermost rack tooth 15a. This starts a return operation to move the driver 15 upward. When one of the engagement parts 24 engages with the bottom of the lowermost rack tooth 15a, the driver 15 returns to the standby position. For example, by appropriately controlling the time from the start of the start of the electric motor 20, the electric motor 20 is stopped at the stage when the piston 14 reaches the standby position. This holds the driver 15 in the standby position. This completes the series of driving operations.

[0056] As described above, the driving tool 1 has a magazine 30 that supplies driving tools N (see FIG. 4) to the end (driving nose portion 2) of the tool body 10 as shown in FIGS. 6 and 7. The driving tool 1 has a contact arm 4 that can protrude from the driving nose portion 2 of the tool body 10. The driving tool 1 has an interlocking lever 37 that moves together with the contact arm 4 when the contact arm 4 is pushed toward the tool body 10. The driving tool 1 has a U-shaped leaf spring 41 (elastic member) that is provided with a first piece 42 pressed by the interlocking lever 37, a second piece 43 facing the first piece 42, and a curved portion 44 (connecting portion) that connects the first piece 42 and the second piece 43 and is disposed in the magazine 30. The driving tool 1 has a switch 38 that is disposed in the magazine 30 and is pressed by the second piece 43 to generate an electric signal.

[0057] Therefore, the switch 38 that detects the movement of the contact arm 4 can be provided in the magazine 30. Therefore, for example, the switch 38 can be replaced without disassembling the main body housing 11 that covers the tool main body 10. This improves the repairability of the driving tool 1. Moreover, the interlocking lever 37 moves integrally with the contact arm 4. A U-shaped leaf spring 41 is interposed between the interlocking lever 37 and the switch 38. The U-shaped leaf spring 41 is also provided in the magazine 30. Therefore, the ease of assembly of the switch 38 to the magazine 30 and the ease of repair when replacing the switch 38 can be improved. In addition, the U-shaped curved portion 44 can be attached to the magazine 30 to support the U-shaped leaf spring 41. Therefore, it is not necessary to provide an extra portion of the U-shaped leaf spring 41 that engages with the magazine 30. This allows the U-shaped leaf spring 41 to be provided compactly. Therefore, the magazine 30 to which the U-shaped leaf spring 41 is attached can be made compact.

[0058] As shown in Figs. 5 to 7, the connecting portion is formed as a curved portion 44. A boss 33 is provided on the magazine 30, located on the inner periphery side of the curved portion 44 and rotatably supporting the U-shaped leaf spring 41. Therefore, the curved portion 44 of the U-shaped leaf spring 41 can be assembled using the boss 33 of the magazine 30. This improves the ease of assembly and repair of the driving tool 1. In addition, the U-shaped leaf spring 41 is supported rotatably around the boss 33 on the inner periphery side. Therefore, the U-shaped leaf spring 41 can be supported while suppressing the width of the U-shaped leaf spring 41 and the protruding length of the boss 33. This allows the magazine 30 to be compact in size, to which the U-shaped leaf spring 41 is assembled.

[0059] 1, 2, and 5, the driving tool 1 has a cover 47 that covers the switch 38. A screw that attaches the cover 47 to the magazine 30 is screwed into the boss 33. Therefore, the switch 38 can be replaced or the like simply by removing the cover 47 from the magazine 30. This improves repairability. In addition, the boss 33 serves both as a portion that supports the U-shaped leaf spring 41 and as a portion into which the screw is screwed. Therefore, the magazine 30 equipped with the boss 33 can be provided in a compact size.

[0060] 5 to 7, the magazine 30 is provided with a positioning rib 34 that is located on the outer periphery of the curved portion 44 of the U-shaped leaf spring 41 to position the U-shaped leaf spring 41. Therefore, the U-shaped leaf spring 41 is supported by the boss 33 on the inner periphery and by the positioning rib 34 on the outer periphery. This stabilizes the support structure of the U-shaped leaf spring 41. This allows the switch 38 to more reliably detect the movement of the contact arm 4 via the U-shaped leaf spring 41.

[0061] As shown in Fig. 5, the U-shaped leaf spring 41 has a substantially uniform width over its entire length. Therefore, the U-shaped leaf spring 41 can be provided compactly in the width direction while maintaining a predetermined elasticity. Therefore, the magazine 30 to which the U-shaped leaf spring 41 is attached can be provided compactly in the width direction of the U-shaped leaf spring 41. Also, the U-shaped leaf spring 41 can be provided by bending a flat plate-shaped member. Therefore, the number of steps required to form the U-shaped leaf spring 41 can be reduced.

[0062] As shown in FIG. 6, the U-shaped leaf spring 41 has a plurality of intervals between the first piece 42 and the second piece 43. Therefore, the total length of the U-shaped leaf spring 41 from the tip of the first piece 42 to the tip of the second piece 43 can be increased. Therefore, the deformation amount of the U-shaped leaf spring 41 is increased. This can improve the accuracy with which the switch 38 detects the movement of the contact arm 4. In addition, by making the interval between the first piece 42 and the second piece 43 into a plurality of intervals, a relief portion can be provided in the U-shaped leaf spring 41. The relief portion suppresses interference with the storage portion of the magazine 30 that stores the U-shaped leaf spring 41 rotatably. Therefore, the movement of the contact arm 4 can be smoothly transmitted to the switch 38 via the U-shaped leaf spring 41.

[0063] As shown in Fig. 5, the driving tool 1 is attached to the magazine 30 and has a cover 47 that includes a widened portion 47a that covers the switch 38 and a narrow portion 47b that extends from the widened portion 47a and is narrower than the widened portion 47a. Therefore, the widened portion 47a is provided with a width necessary to cover the switch 38, and the narrow portion 47b is provided with a width that is narrower than the widened portion 47a. This makes it possible to reduce the covering area of ​​the cover 47. This allows the magazine 30 to which the cover 47 is attached to be compact.

[0064] As shown in Figures 5 to 7, the driving tool 1 has a lead wire 45 extending from the switch 38. The driving tool 1 has a connector 46 to which an end of the lead wire 45 is connected. The lead wire 45 and the connector 46 are covered by a narrow portion 47b of a cover 47. Therefore, the switch 38, the lead wire 45, and the connector 46 can be exposed simply by removing the cover 47 from the magazine 30. The switch 38, the lead wire 45, and the connector 46 can be covered simply by attaching the cover 47 to the magazine 30. Therefore, repairability can be improved when replacing the switch 38, etc.

[0065] 6 and 7, the switch 38 has a protruding pin 38b that is pressed by the U-shaped leaf spring 41 in a direction parallel to the movement direction of the contact arm 4 relative to the tool body 10. Therefore, the movement direction of the contact arm 4 and the direction in which the protruding pin 38b is pressed by the U-shaped leaf spring 41 generally coincide with each other. Therefore, when the movement force of the contact arm 4 is converted into the operating force of the protruding pin 38b via the U-shaped leaf spring 41, the loss of force can be suppressed. This can improve the accuracy with which the switch 38 detects the movement of the contact arm 4.

[0066] 4, the driving tool 1 has a piston 14 that moves by gas pressure. The driving tool 1 has a driver 15 that moves together with the piston 14 to strike the driving tool N. This makes it possible to improve the repairability of the so-called gas spring type driving tool 1 and to prevent the tool body 10 from becoming large.

[0067] Next, a second embodiment of the present disclosure will be described with reference to Figures 8 and 9. A driving tool 50 of the second embodiment has a contact arm 51 instead of the contact arm 4 shown in Figure 4. In the following description, only the parts that differ from the first embodiment will be described in detail.

[0068] As shown in Figs. 8 and 9, the contact arm 51 is provided on a plate-like member extending generally in the vertical direction. The lower end of the contact arm 51 is provided with a tip 51a that abuts against the workpiece to be driven. The upper part of the contact arm 51 is provided with an adjuster connecting part 51b that extends to the left of the driving nose part 2. The tip of the adjuster connecting part 51b is bent to the left and has a through hole that penetrates in the vertical direction. The lower part of the rotation shaft 36a of the adjuster 36 is inserted into the through hole of the adjuster connecting part 51b. The driving tool 50 has an adjuster 36 on the left side of the driving nose part 2. The adjuster 36 is supported by the main housing 11 so as to be rotatable around the rotation shaft 36a that extends in the vertical direction.

[0069] As shown in Figs. 8 and 9, the driving tool 50 has an interlocking lever 52 on the left side of the driving nose portion 2. The interlocking lever 52 extends generally in the front-rear direction. An adjuster connecting portion 52a is provided at the rear end of the interlocking lever 52. The adjuster connecting portion 52a is provided with a through hole that penetrates in the vertical direction and through which the upper portion of the rotating shaft 36a is inserted. A compression spring 36b is provided above the adjuster connecting portion 52a to urge the interlocking lever 52, the adjuster 36, and the contact arm 51 downward relative to the main body housing 11. The contact arm 51 is normally located at the OFF position C1 due to the urging force of the compression spring 36b. The OFF position C1 of the contact arm 51 can be adjusted up and down by operating the adjuster 36. The interlocking lever 52 moves up and down integrally with the contact arm 51 and the adjuster 36 between the OFF position C1 and the ON position C2 (see Fig. 7).

[0070] 8 and 9, an abutment portion 52b is provided at the front end of the interlocking lever 52. A U-shaped leaf spring 41 is provided above the abutment portion 52b. The U-shaped leaf spring 41 is provided in such a position that a first piece 42 is located at the bottom, a second piece 43 is located at the top, and a curved portion 44 is located in front. A cylindrical boss 53 provided in the main body housing 11 is inserted into the inner periphery of the curved portion 44. The U-shaped leaf spring 41 is supported by the main body housing 11 so as to be rotatable up and down around the boss 53.

[0071] 8 and 9, a switch 38 is provided above the U-shaped leaf spring 41. The switch 38 is accommodated in the main housing 11 with a protruding pin 38b protruding downward. The switch 38 is disposed to the left of the driving nose 2 in a position where it overlaps with the lift mechanism 22 in the vertical direction.

[0072] As shown in FIGS. 8 and 9, the first piece 42 can abut against the abutment portion 52b of the interlocking lever 52. The second piece 43 can abut against the protruding pin 38b of the switch 38. When the contact arm 51 is located at the lower OFF position C1, the interlocking lever 52 is also located at the lower position. At this time, the abutment portion 52b is spaced downward from the first piece 42. Although the second piece 43 abuts against the protruding pin 38b, it does not push the protruding pin 38b upward. Therefore, the switch 38 is in the OFF state, and the pulling operation of the trigger 6 is ineffective. When the contact arm 51 and the interlocking lever 52 move upward to the ON position C2 (see FIG. 7), the abutment portion 52b pushes the first piece 42 from the bottom upward. The U-shaped leaf spring 41 rotates upward around the boss 53. The second piece 43 pushes the protruding pin 38b upward. Therefore, the switch 38 is switched to the ON state. An electrical signal is sent to the controller 9 to validate the pulling of the trigger 6 .

[0073] As shown in Figs. 8 and 9, the lead wire 54 extends upward from the upper end of the switch body 38a along the left part of the cylinder 12. The upper end of the lead wire 54 is connected to the male connector 55a. The male connector 55a is engageable with the female connector 55b at the rear. The male connector 55a and the female connector 55b engage with each other to form a pair of connectors 55. The connector 55 is disposed on the left side of the cylinder 12. The connector 55 is disposed on the opposite side in the left-right direction to the air chamber 13a disposed on the left side of the cylinder 12. At least one of the male connector 55a and the female connector 55b is held by a rib in a position adjacent to the left wall of the cylinder 12 to the main body housing 11. The lead wire 54 extends backward from the rear end of the female connector 55b. The lead wire 54 is inserted through the grip 5 and electrically connected to the controller 9 (see Fig. 3).

[0074] Various modifications can be made to the driving tools 1 and 50 of the above-described embodiments. The driving tools 1 and 50 of the gas spring type are exemplified. Instead of this, for example, the present disclosure may be applied to a mechanical spring type driving tool that ejects a driver by utilizing the spring force of a mechanical compression spring or the like generated when the driver is moved in the counter driving direction by a lift mechanism. For example, the present disclosure may be applied to a flywheel type driving tool that ejects a driver by utilizing the inertial force of a flywheel. For example, the present disclosure may be applied to an electro-pneumatic driving tool that uses compressed air generated by rotating a crank with an electric motor. For example, the present disclosure may be applied to an air tool that ejects a driver by utilizing compressed air supplied from the outside.

[0075] Although a nail is exemplified as the driving tool N, it may be, for example, a driving tool capable of ejecting U-shaped staples. The magazine 30 extending straight in the front-to-rear direction is exemplified. Alternatively, the magazine may be inclined, for example, to the left or right. For example, the magazine may be inclined upward as it moves away from the driving nose portion 2.

[0076] In the illustrated embodiment, the switch 38, the U-shaped leaf spring 41, the adjuster 36, the connector 46, etc. are provided on the right side wall of the magazine 30. Alternatively, the switch 38, the U-shaped leaf spring 41, the adjuster 36, the connector 46, etc. may be provided on the left side wall of the magazine 30.

[0077] The U-shaped leaf spring 41 has been exemplified as having a stepped structure in which the distance between the first piece 42 and the second piece 43 is two steps. Alternatively, the distance between the first piece 42 and the second piece 43 may be three or more steps. The U-shaped leaf spring 41 has been exemplified as having a stepped portion 43a on the second piece 43 side. Alternatively, for example, a structure in which a stepped portion is provided on the first piece 42 side, or a structure in which a stepped portion is provided on both the first piece 42 and the second piece 43 may be used.

[0078] In the illustrated example, the switch 38 is accommodated in the switch accommodating portion 32 of the magazine 30 with the protruding pin 38b protruding downward. Alternatively, the protruding direction of the protruding pin 38b may be tilted forward or backward from the illustrated position in accordance with the rotating position of the U-shaped leaf spring 41. In the illustrated example, the protruding pin 38b overlaps with the abutting portion 37b in the front-rear direction. Alternatively, the protruding pin 38b may be disposed forward or backward of the abutting portion 37b.

[0079] The connector 46 is illustrated as electrically connecting the switch 38 that detects the movement of the contact arm 4 and the controller 9. The connector housing portion 39 of the magazine 30 may further house connectors, lead wires, etc. that electrically connect other electrical components to the controller 9, etc. [Explanation of symbols]

[0080] 1...Driving tool 2... Driving nose part (end part) 3... firing passage, 3a... ejection port 4...contact arm, 4a...tip, 4b...adjuster connection part 5. Grip 6...Trigger, 6a...Trigger switch 7…Battery mounting section 8…Battery pack 9. Controller 10...Tool body 11...main body housing, 11a...drive unit case, 11b...window portion 12...Cylinder 13...pressure accumulator, 13a...air chamber 14…Piston 15...driver, 15a...rack teeth (engaged portion), 15b...tip 16…Cushion 20...Electric motor 21...Planetary reduction mechanism 22...Lift mechanism 23…Wheels 24...Engagement part 30…Magazine 31…Adjuster support part 32: switch housing portion, 32a: opening 33... boss, 33a... screw hole 34…Positioning rib 35…Pusher, 35a…Front 36...adjuster, 36a...rotating shaft, 36b...compression spring 37: Interlocking lever, 37a: Adjuster connection portion, 37b: Contact portion 38...switch, 38a...switch body, 38b...projecting pin, 38c...case 39…Connector housing 41...U-shaped leaf spring (elastic member) 42...1st piece 43... second piece, 43a... stepped portion 44…Curved section (connecting section) 45…Lead wire 46...connector, 46a...male connector, 46b...female connector 47...cover, 47a...widened portion, 47b...narrowed portion, 47c...adjuster cover 47d…Through hole 48…Screw 50...Driving tool 51: contact arm; 51a: tip; 51b: adjuster connection portion 52... Interlocking lever, 52a... Adjuster connection portion, 52b... Contact portion 53...Boss 54…Lead wire 55...connector, 55a...male connector, 55b...female connector C1…OFF position, C2…ON position D1...first interval, D2...second interval N: driving tool, Na: head W…Material to be driven

Claims

1. A driving tool, a magazine for supplying driving tools to the end of the tool body; a contact arm protruding from the end of the tool body; an interlocking lever that moves integrally with the contact arm when the contact arm is pushed into the tool body; an elastic member disposed in the magazine, the elastic member including a first piece pressed by the interlocking lever, a second piece opposed to the first piece, and a connecting portion connecting the first piece and the second piece; a driving tool having a switch disposed in the magazine and pressed by the second piece to generate an electrical signal;

2. The driving tool according to claim 1, The connecting portion is formed as a curved portion, A driving tool, in which a boss is provided on the magazine, the boss being positioned on the inner periphery of the curved portion and rotatably supporting the elastic member.

3. The driving tool according to claim 2, A cover for covering the switch is provided. A driving tool into which the bosses are threadedly engage screws that attach the cover to the magazine.

4. The driving tool according to claim 2 or 3, A driving tool, in which a positioning rib for positioning the elastic member is provided on the magazine and located on the outer periphery side of the curved portion of the elastic member.

5. The driving tool according to any one of claims 1 to 4, The elastic member has a substantially uniform width over its entire length.

6. A driving tool according to any one of claims 1 to 5, The elastic member is a driving tool in which the distance between the first piece and the second piece is varied in multiple stages.

7. A driving tool according to any one of claims 1 to 6, A driving tool is attached to the magazine and has a cover including an enlarged portion that covers the switch, and a narrow portion that extends from the enlarged portion and is narrower than the enlarged portion.

8. The driving tool according to claim 7, A lead wire extending from the switch; a connector to which an end of the lead wire is connected, A driving tool in which the lead wires and the connector are covered by the narrow portion of the cover.

9. A driving tool according to any one of claims 1 to 8, The switch is a driving tool having a protruding pin that is pressed by the elastic member in a direction parallel to the movement direction of the contact arm relative to the tool body.

10. A driving tool according to any one of claims 1 to 9, A piston that moves due to gas pressure; A driving tool having a driver that moves integrally with the piston and strikes the driving tool.

Images