Hammering tool

Abstract

To provide a hammering tool which compactifies arrangement of a controller to compactify a total size thereof.SOLUTION: A hammering tool 1 includes: a tool body 10 with a driver 15 which moves downward to strike driving means N; a grip 4 which extends from the tool body 10 to a rearward direction; a battery installation part 6 which is arranged at the rear part of the grip 4 and to which the battery 7 can be attached; a motor housing 11a which extends from the tool body 10 to the rearward direction at the lower part of the grip 4 and accommodates an electric motor 20 to move the driver 15; and a controller 8 which is arranged below the electric motor 20 and performs motion control of the electric motor 20.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a driving tool for driving a driving tool into a workpiece. [Background technology]

[0002] Patent Documents 1 and 2 disclose a gas spring type driving tool that uses the thrust of compressed gas as a driving force. The driving tool has a driver that strikes the driving tool, a lift mechanism that returns the driver to a standby position, and an electric motor that serves as a drive source for the lift mechanism. The driver, lift mechanism, and electric motor are housed within the tool body of the driving tool. The driving tool has: The tool has a driving nose portion at the bottom of the tool body from which the driving tool is ejected, a grip extending laterally from the tool body, and a magazine for storing a large number of driving tools. The magazine extends from the driving nose portion generally in the extension direction of the grip.

[0003] As described in Patent Documents 1 and 2, a battery is attached to the driving tool to supply power to the electric motor. The battery attachment part is provided at the tip of the grip. A flat controller is housed inside the battery attachment part along the upper surface of the battery. The controller controls, for example, the operation of the electric motor. With the conventional controller arrangement, it was difficult to make the driving tool more compact in the extension direction of the grip (front-rear direction). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2023-64270 A [Patent Document 2] International Publication No. 2018 / 198670 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, there is a need for a driving tool that can reduce the size of the controller and make the whole tool more compact. [Means for solving the problem]

[0006] According to one feature of the present disclosure, the driving tool has a tool body including a driver that moves downward to strike the driving tool. The driving tool has a grip extending rearward from the tool body. The driving tool has a battery attachment portion provided at the rear of the grip and capable of attaching a battery. The driving tool has a motor housing extending rearward from the tool body below the grip and housing an electric motor that moves the driver. The driving tool has a controller disposed below the electric motor and controlling the operation of the electric motor.

[0007] Therefore, the controller is disposed further below the electric motor which is disposed below the battery mounting part. This allows the area around the battery mounting part to be made more compact than, for example, a conventional configuration in which the controller is disposed along the mounting surface of the battery attached to the battery mounting part. The controller can be disposed compactly along the lower part of the electric motor. This allows the entire driving tool to be made compact in the front-rear direction. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a right side view of the driving tool according to the first embodiment with the right housing removed. [Diagram 2] 1 is a vertical cross-sectional view of the driving tool when the driver is in the standby position, as viewed from the right. FIG. [Diagram 3] 11 is a vertical cross-sectional view of the driving tool seen from the right after the driver has performed a driving operation. FIG. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 2. [Diagram 5] 4 is a cross-sectional view taken along line VV in FIG. 3. [Figure 6] FIG. 2 is a front view of the lower part of the tool body. [Figure 7]FIG. [Figure 8] FIG. 2 is a perspective view of the driving tool with the right housing, the magazine, and the battery removed. [Figure 9] FIG. 11 is a right side view of the driving tool according to the second embodiment with the right housing removed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] According to another feature of the present disclosure, the long sides of the box-shaped controller are aligned along the front-rear direction, so that the driving tool can be made compact in the front-rear direction while preventing the driving tool from becoming large in the up-down direction due to the arrangement of the controller.

[0010] According to another feature of the present disclosure, an elastic member is interposed between the motor housing and either one or both of the upper and lower surfaces of the controller. Therefore, the elastic member can protect the controller from, for example, an impact during a driving operation or an impact due to a reaction immediately after driving. During a driving operation or immediately after driving, a reaction occurs that moves the tool body upward against the controller, which tends to remain in place. Therefore, the impact is mainly transmitted from the lower surface side of the controller. By interposing an elastic member on the lower surface side of the controller, the impact transmitted to the controller can be more efficiently suppressed.

[0011] According to another feature of the present disclosure, the driving tool has a magazine that houses driving tools and extends rearward from a lower portion of the tool body. A controller is disposed between the magazine and the electric motor. This allows the controller to be disposed in the space between the top and bottom of the magazine and the electric motor. This allows the periphery of the battery attachment portion to be made compact.

[0012] According to another feature of the present disclosure, the rear surface of the magazine is flush with or positioned forward of the rear surface of the battery attached to the battery attachment section. Therefore, the periphery of the battery attached to the battery attachment section can be made compact in the front-rear direction. For example, even if the battery protrudes rearward from the rear surface of the magazine, no controller is provided around the battery attachment section. Therefore, the amount of protrusion of the battery can be suppressed, and the periphery can be made compact in the front-rear direction.

[0013] According to another feature of the present disclosure, the driving tool has a nose portion that is vertically movable at the bottom of the tool body and has an ejection port for the driving tool. When the nose portion is in the upper position, it protrudes downward from the magazine by 40 millimeters or more. Therefore, for example, when driving a driving tool into the bottom of the groove, the long nose portion can be inserted into the groove. This improves the ease of handling of the driving tool.

[0014] According to another feature of the present disclosure, the nose portion has a width of 15 millimeters or less in at least one direction, so that, for example, when driving a driving tool into the bottom of a narrow groove, the narrow nose portion can be inserted into the groove, thereby improving the ease of handling of the driving tool.

[0015] According to another feature of the present disclosure, the driving tool has a magazine support portion that protrudes from the motor housing along the side of the magazine. Therefore, the side of the magazine can be supported by the magazine support portion. This makes it possible to stably support the magazine that is long in the front-rear direction.

[0016] According to another feature of the present disclosure, the rear surface of the battery attached to the battery attachment section is inclined upward and forward. Therefore, by disposing the controller below the electric motor, the degree of freedom of the battery attachment section can be increased. Therefore, for example, when the rear surface of the battery is placed on the ground and the front lower part of the nose section is placed facing upward, the rear end of the magazine can be prevented from interfering with the ground surface. This improves the ease of handling of the driving tool.

[0017] According to another feature of the present disclosure, the tool body is provided with a piston that moves downward together with the driver by gas pressure in a cylinder. The tool body is provided with a lift mechanism that moves the driver upward to increase the gas pressure. Therefore, the controller can be arranged compactly in a so-called gas spring type driving tool.

[0018] Next, a first embodiment of the present disclosure will be described with reference to Figs. 1 to 8. 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 will be illustrated. 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.

[0019] As shown in Figs. 1 to 3, 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.

[0020] 4 and 5, the right part of the pressure 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 below and overlaps with the lift mechanism in the left-right direction. By providing the air chamber 13a to the right of the cylinder 12, it is possible to increase the capacity of the pressure accumulator chamber 13 including the air chamber 13a while preventing the tool body 10 from becoming large in the vertical direction.

[0021] As shown in Figs. 1 to 5, a driver guide 17 is provided at the bottom of the tool body 10. A driving nose 2 that comes into contact with the workpiece W is provided at the bottom of the driver guide 17. The driving nose 2 is provided in a generally cylindrical shape extending in the vertical direction. The driving nose 2 can move in the vertical direction between a lower position C1 and an upper position C2 with respect to the driver guide 17. The driving nose 2 also serves as a contact arm that detects contact with the workpiece W. The driver guide 17 and the driving nose 2 cooperate to form a driving passage 3. The driving passage 3 is formed as a passage extending straight in the vertical direction by the inner peripheral surface of the driver guide 17 and the inner peripheral surface of the driving nose 2. The upper end of the driving passage 3 on the driver guide 17 side is connected to the lower part of the cylinder 12.

[0022] As shown in FIGS. 1 to 3, a magazine 30 is connected to the rear of the driver guide 17. The magazine 30 extends straight backward from the driver guide 17. It is provided in a substantially rectangular box shape. A plurality of driving tools N extending in the vertical direction and arranged in parallel in the front-rear direction are loaded in the magazine 30. In this embodiment, the driving tools N are nails to be driven into a workpiece W made of concrete, for example. The driving tools N are connected in a lined-up state in the front-rear direction by a connecting member made of resin, for example. The driving tools N are supplied one by one forward from the magazine 30 toward the driving passage 3. Note that the figure shows a state in which the last driving tool N in the magazine 30 has been supplied to the driving passage 3 or driven into the workpiece W. The case in which the driving tools N remain in the magazine 30 is omitted.

[0023] As shown in Figures 1 to 3, a grip 4 that is held by a user is provided extending rearward from the rear of the tool body 10. A trigger 5 that is operated by a user by pulling it with a fingertip is provided on the underside of the front of the grip 4. A trigger switch 5a that switches from an OFF state to an ON state in response to pulling the trigger 5 is provided inside the grip 4. Pulling the trigger 5 becomes effective when the driving nose 2 is pressed against the workpiece W to be driven and moves from a lower position C1 to an upper position C2.

[0024] As shown in Figs. 1 to 3, a battery mounting section 6 extending in the vertical direction is provided on the rear surface of the grip 4. A battery 7 can be removably mounted on the battery mounting section 6. The battery 7 can be removed from the battery mounting section 6 and repeatedly charged with a separately prepared charger for use. The battery 7 can be used as a power source for other electric tools. The battery 7 supplies power to an electric motor 20, which will be described later, and the like. The mounting surface 7a of the battery 7 mounted on the battery mounting section 6 extends in the vertical direction substantially parallel to the driving direction. The battery mounting section 6 has a lower portion 6a extending rearward below the battery 7. The lower portion 6a faces the lower surface of the battery 7. The rear surface 7b of the battery 7 and the rear surface of the lower portion 6a are aligned vertically and substantially flush with each other. The rear surface 30b of the magazine 30 is substantially flush with the rear surface 7b of the battery 7 and the rear surface of the lower portion 6a, and does not protrude rearward at least beyond the rear surface 7b.

[0025] As shown in FIGS. 1 to 3, the main body housing 11 has a substantially cylindrical motor housing 11a extending in the front-rear direction above the magazine 30 and below the grip 4. The rear part of the motor housing 11a is connected to the lower part of the battery attachment part 6. A substantially cylindrical gear housing 11b having substantially the same diameter as the motor housing 11a is provided in front of the motor housing 11a. A substantially cylindrical lifter housing 11c (see FIG. 4) is provided in front of the gear housing 11b. The motor housing 11a, the gear housing 11b, and the lifter housing 11c are integrally provided and formed in a substantially cylindrical shape extending rearward from the tool main body 10. The front end of the gear housing 11b is connected to the front part of the main body housing 11. Therefore, the grip 4, the battery attachment part 6, the motor housing 11a, and the gear housing 11b cooperate to form a loop shape.

[0026] As shown in Figures 4 and 5, a driver 15 that is long vertically is connected to the bottom surface of the piston 14. The bottom 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 top surface of the piston 14. The tip 15b located at the bottom end of the driver 15 strikes the head of one driving tool N supplied to the driving passage 3 when it moves to the driving position. The struck driving tool N moves downward in the driving passage 3 and is ejected from the ejection port 2a at the bottom end of the driving nose 2. The ejected driving tool N is driven into the workpiece W. A substantially cylindrical cushion 16 is provided on the inside bottom side of the cylinder 12 to absorb the impact of the piston 14 at the bottom dead center.

[0027] As shown in Figs. 4 and 5, a plurality of rack teeth (engaged parts) 15a protruding to the right are provided on the right side of the driver 15. In this embodiment, eight rack teeth 15a are arranged side by side in the vertical direction, which is the longitudinal direction of the driver 15. Each rack tooth 15a is provided in a substantially triangular shape with its bottom facing downward, which is the driving direction, when viewed from the front. The bottom of the rack tooth 15a engages with an engaging part 24 of the lift mechanism 22, which will be described later. The vertical distance from the bottom of the lowest rack tooth 15a to the tip 15b of the driver 15 is at least 75 mm or more, for example, 75 to 90 mm.

[0028] As shown in Figs. 1 to 3, the motor housing 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 moving the driving nose part 2 and operating the trigger 5, using the battery 7 as a power source. A planetary reduction mechanism 21 accommodated in the gear housing 11b 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 accommodated in the lifter housing 11c is provided in front of the planetary reduction mechanism 21. The lift mechanism 22 moves the driver 15 and the piston 14 upward against the air pressure in the pressure accumulator chamber 13. 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.

[0029] As shown in Figs. 4 and 5, 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 provided along the outer periphery of the wheel 23. In this embodiment, for example, eight engagement portions 24 are arranged at intervals in the circumferential direction of the wheel 23. The engagement portions 24 use cylindrical shaft members (pins) that extend in the front-rear direction. As the wheel 23 rotates, each engagement portion 24 moves around the center of rotation of the wheel 23.

[0030] As shown in Figures 4 and 5, the left part of the wheel 23 enters the driving passage 3 of the driver guide 17 through a window 11d provided in the left part of the lifter housing 11c. 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 any one of the rack teeth 15a, the wheel 23 rotates counterclockwise. This causes the driver 15 and the piston 14 to move upward. As the piston 14 moves upward, the gas pressure in the pressure accumulator chamber 13 is increased.

[0031] As shown in Figures 1 to 3 and 7, the rectangular box-shaped magazine 30 has a bottom surface 30a that extends straight in the front-rear direction. The magazine 30 has a rear surface 30b that extends straight in the up-down direction. A magazine cap 31 that constitutes the rear surface 30b is provided at the rear of the magazine 30. The magazine 30 has side surfaces 30c that extend in the front-rear direction and the up-down direction on both the left and right sides.

[0032] As shown in FIGS. 1 to 3 and 7, the front end of the magazine 30 is connected to the rear part of the driver guide 17. The inside of the magazine 30 is connected to the driving passage 3 of the driver guide 17 via an upper opening 30d (see FIG. 4). A pusher 32 is provided inside the magazine 30 to supply the driving tools N to the driving passage 3. The pusher 32 is provided in a flat plate shape extending in the up-down and front-rear directions. The pusher 32 is biased forward by a power spring 33. The power spring 33 is housed in a spring housing provided on the left side surface 30c of the magazine 30. The front surface of the pusher 32 pushes the driving tools N housed in the front toward the driving passage 3. As a result, the driving tools N are supplied one by one to the driving passage 3.

[0033] As shown in Figs. 1 to 6, the driving nose 2 protrudes downward from the lower part of the driver guide 17. In the upper position C2, the driving nose 2 protrudes downward from the lower surface 30a of the magazine 30 by a protruding length L. The protruding length L is at least 40 millimeters or more, for example, 40 to 55 millimeters. The driver 15 standby position is located lower by the amount of the driving nose 2 being provided longer. By ensuring the protruding length L by which the driving nose 2 protrudes in the upper position C2, the driving tool N can be driven into the bottom of a groove formed in the material W to be driven, for example. The diameter D of the driving nose 2 is 15 millimeters or less, for example, 12 millimeters. The diameter D is the width of the driving nose 2 in a direction perpendicular to the up-down direction. By providing the driving nose 2 with a narrow width, the driving tool N can be driven into the bottom of a narrow groove formed in the material W to be driven, for example.

[0034] As shown in Fig. 6, an upper portion of the driving nose portion 2 is provided integrally with a contact plate 34. The contact plate 34 is supported by the driver guide 17 so as to be slidable in the vertical direction. The contact plate 34 has a spring receiving portion 34a that protrudes forward. The spring receiving portion 34a is urged downward by a compression spring 34b supported by the main body housing 11. The driving nose portion 2 is urged toward the downward position C1 together with the contact plate 34 by the urging force of the compression spring 34b.

[0035] As shown in Figs. 1 and 6, a dial-type adjuster 35 is provided in front of the contact plate 34. The adjuster 35 has a rotating shaft 35a extending in the vertical direction. The rotating shaft 35a is supported by the main housing 11 so as to be rotatable and movable in the vertical direction. The contact plate 34 is connected to the rotating shaft 35a and can move in the vertical direction together. The vertical positions of the contact plate 34 and the driving nose portion 2 can be adjusted by rotating the adjuster 35. The adjuster 35 has a compression spring 35b that is disposed on the outer periphery of the rotating shaft 35a and supported by the main housing 11. The compression spring 35b urges the adjuster 35 downward.

[0036] As shown in FIGS. 1 to 3, the driving tool 1 has a switch 37 that detects the up-down movement of the driving nose portion 2. The switch 37 has a protruding pin 37a that protrudes downward from a rectangular box-shaped switch body. A U-shaped leaf spring 36 is provided between the protruding pin 37a and the upper end of the rotating shaft 35a of the adjuster 35. The U-shaped leaf spring 36 is provided in a shape in which a lower first piece 36a and an upper second piece 36b are connected by a U-shaped curved portion. The U-shaped leaf spring 36 is supported by the main housing 11 at the curved portion so as to be rotatable in the up-down direction. The first piece 36a abuts against the upper end of the rotating shaft 35a. The second piece 36b abuts against the protruding pin 37a.

[0037] As shown in Figs. 1 to 3, when the driving nose 2 moves to the upper position C2, the rotating shaft 35a of the adjuster 35 also moves upward via the contact plate 34 (see Fig. 6). The U-shaped leaf spring 36 rotates upward as the first piece 36a is pressed by the upper end of the rotating shaft 35a. This causes the second piece 36b to press the protruding pin 37a and turn the switch 37 on. On the other hand, when the driving nose 2 is located in the lower position C1, the rotating shaft 35a is also located downward. The U-shaped leaf spring 36 is not pressed by the rotating shaft 35a. Therefore, the second piece 36b does not press the protruding pin 37a upward, and the switch 37 is in the off state. Thus, the switch 37 transmits an on signal to the controller 8 only when the driving nose 2 moves to the upper position C2. When an on signal is transmitted to the controller 8, pulling the trigger 5 is enabled.

[0038] As shown in Figs. 1 to 3, the driving tool 1 has a controller 8 that mainly controls the driving of the electric motor 20. The controller 8 is provided in a shallow rectangular box-shaped case with a control board housed therein. The controller 8 is provided vertically below the motor housing 11a that houses the electric motor 20 and above the magazine 30. The controller 8 is housed in the motor housing 11a and the gear housing 11b below the electric motor 20. A space is formed between the electric motor 20 and the magazine 30 in the vertical direction by extending the driving nose portion 2 downward and setting the standby position of the driver 15 toward the bottom. The controller 8 is disposed in this space.

[0039] As shown in Figs. 1 to 3 and 8, the controller 8 is disposed in a position in which the longest side is in the front-rear direction and the shortest side in the thickness direction is in the up-down direction. The controller 8 is disposed in a position in which the upper surface (long side) 8a and the lower surface (long side) 8b are aligned along the motor axial direction of the electric motor 20, i.e., along the front-rear direction. A space is provided below the electric motor 20 between the upper surface 8a of the controller and the upper surface of the motor housing 11a in the up-down direction. A space is also provided between the lower surface 8b of the controller 8 and the lower surface of the main body housing 11. An elastic member 9 can be interposed in each of the spaces above and below the controller 8. The elastic member 9 is made of, for example, rubber. The elastic member 9 suppresses the transmission of impact due to recoil during the driving operation or immediately after driving to the controller 8.

[0040] As shown in FIGS. 1 to 3 and 8, the front surface 8c of the controller 8 is arranged in a position aligned with the planetary reduction mechanism 21 in the front-rear direction. The rear surface 8d of the controller 8 is arranged rearward of the electric motor 20. A rib-shaped magazine support portion 11e that protrudes downward from the storage portion of the controller 8 is provided on the left side surface of the main body housing 11. The magazine support portion 11e is provided below the motor housing 11a and the gear housing 11b. The magazine support portion 11e extends long in the front-rear direction along the lower surfaces of the motor housing 11a and the gear housing 11b. The lower surface of the main body housing 11 abuts against the upper surface of the magazine 30. The right side surface of the magazine support portion 11e abuts against the left side surface 30c of the magazine 30 (see FIG. 7). Therefore, the position of the magazine 30 is stabilized by the upper surface and the side surface 30c being positioned by the main body housing 11.

[0041] Next, a series of steps of the driving operation of the driving tool 1 will be described with reference to Figs. 2 to 5. Figs. 2 and 4 show the driver 15 in a standby state. Figs. 3 and 5 show the driver 15 in a state immediately after driving when it has moved to the bottom dead center. 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 engages with the final engagement portion 24a of the lift mechanism 22. When the driver 15 is in the standby position, the tip 15b of the driver 15 vertically overlaps with the head of the driving tool N at the forefront in the magazine 30. Therefore, the driving tool N has not yet been supplied to the driving passage 3.

[0042] When the lower end of the driving nose 2 is pressed against the workpiece W, the driving nose 2 moves from the lower position C1 to the upper position C2. The rotating shaft 35a of the adjuster 35 moves upward in conjunction with the driving nose 2. The protruding pin 37a of the switch 37 is pressed through the U-shaped leaf spring 36 and turns on. The controller 8 starts the electric motor 20 when the switch 37 receives an electric signal indicating that the switch 37 has turned on and the trigger 5 is pulled. When the electric motor 20 is started, the wheel 23 of the lift mechanism 22 rotates. The final engagement portion 24a moves the rack tooth 15a at the bottom upward. This causes the driver 15 to move upward from the standby position to the top dead center.

[0043] When the driver 15 reaches the top dead center and reaches a state immediately before driving, the final engagement portion 24a 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 has been applied to the piston 14. While the driver 15 is moving upward from the standby position to the top dead center, one driving tool N at the front end is supplied from the magazine 30 to the driving passage 3. The tip 15b of the driver 15 moves downward in the driving passage 3 and strikes the head of one driving tool N. When the driver 15 moves downward, all of the engagement 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 engagement portions 24 is avoided, and a smooth driving operation is performed.

[0044] 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 topmost rack tooth 15a. This starts a return operation to move the driver 15 upward. When the final engagement part 24a engages with the bottom of the bottommost rack tooth 15a, the driver 15 returns to the standby position. For example, by appropriately measuring the time from the start of the electric motor 20 or the rotation position of the wheel 23, 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.

[0045] As described above, the driving tool 1 has a tool body 10 equipped with a driver 15 that moves downward to strike the driving tool N as shown in Figures 2 and 3. The driving tool 1 has a grip 4 extending rearward from the tool body 10. The driving tool 1 has a battery attachment section 6 that is provided at the rear of the grip 4 and to which a battery 7 can be attached. The driving tool 1 has a motor housing 11a that extends rearward from the tool body 10 below the grip 4 and that houses an electric motor 20 that moves the driver 15. The driving tool 1 has a controller 8 that is disposed below the electric motor 20 and controls the operation of the electric motor 20.

[0046] Therefore, the controller 8 is disposed further below the electric motor 20 which is disposed below the battery mounting part 6. This allows the area around the battery mounting part 6 to be made more compact than, for example, a conventional configuration in which the controller 8 is disposed along the mounting surface 7a of the battery 7 attached to the battery mounting part 6. The controller 8 can be disposed compactly along the lower part of the electric motor 20. Thus, the entire driving tool 1 can be made compact in the front-rear direction.

[0047] 1 to 3, the upper surface 8a and the lower surface 8b, which are the longer sides of the box-shaped controller 8, are aligned in the front-rear direction. Therefore, the arrangement of the controller 8 can prevent the driving tool 1 from becoming large in the vertical direction, while making the driving tool 1 more compact in the front-rear direction.

[0048] As shown in Figs. 1 to 3, an elastic member 9 is interposed between both the upper surface 8a and the lower surface 8b of the controller 8 and the motor housing 11a. Therefore, the elastic member 9 can protect the controller 8 from, for example, an impact during a driving operation or an impact due to a reaction immediately after driving. During a driving operation or immediately after driving, a reaction occurs that moves the tool body 10 upward against the controller 8, etc., that tends to remain in place. Therefore, the impact is mainly transmitted from the lower surface 8b side of the controller 8. By interposing the elastic member 9 on the lower surface 8b side of the controller 8, the impact transmitted to the controller 8 can be more efficiently suppressed.

[0049] 2 and 3, the driving tool 1 has a magazine 30 that houses the driving tools N and extends rearward from the bottom of the tool body 10. The controller 8 is disposed between the magazine 30 and the electric motor 20. Therefore, the controller 8 can be disposed in the space between the top and bottom of the magazine 30 and the electric motor 20. This allows the area around the battery attachment portion 6 to be made more compact.

[0050] 1 to 3, the rear surface 30b of the magazine 30 is located flush with or in front of the rear surface 7b of the battery 7 attached to the battery attachment section 6. Therefore, the periphery of the battery 7 attached to the battery attachment section 6 can be made compact in the front-rear direction. For example, even if the battery 7 protrudes rearward from the rear surface 30b of the magazine 30, the controller 8 is not provided around the battery attachment section 6. Therefore, the amount of protrusion of the battery 7 can be suppressed, and the periphery can be made compact in the front-rear direction.

[0051] 2 and 3, the driving tool 1 has a driving nose 2 that is vertically movable on the lower part of the tool body 10 and has an ejection port 2a for the driving tool N. When the driving nose 2 is in the upper position, it protrudes downward by 40 millimeters or more from the magazine 30. Therefore, for example, when driving the driving tool N into the bottom of a groove, the long driving nose 2 can be inserted into the groove. This improves the ease of handling of the driving tool 1.

[0052] 1 to 3, the driving nose portion 2 has a width (diameter D) of 15 millimeters or less in at least one direction. Therefore, for example, when driving the driving tool N into the bottom of a narrow groove, the driving nose portion 2 having a small width can be inserted into the groove. This improves the ease of handling of the driving tool 1.

[0053] 7, the driving tool 1 has a magazine support portion 11e that protrudes from the motor housing 11a along the side surface 30c of the magazine 30. Therefore, the magazine support portion 11e can support the side surface 30c of the magazine 30. This makes it possible to stably support the magazine 30, which is long in the front-rear direction.

[0054] 2 and 3, the tool body 10 is provided with a piston 14 that moves downward together with a driver 15 due to the gas pressure in a cylinder 12. The tool body 10 is provided with a lift mechanism 22 that moves the driver 15 upward to increase the gas pressure. Therefore, the controller 8 can be arranged compactly in the so-called gas spring type driving tool 1.

[0055] Next, a second embodiment of the present disclosure will be described with reference to Fig. 9. A driving tool 40 of the second embodiment has a battery attachment part 41 instead of the battery attachment part 6 shown in Fig. 1. In the following description, only the parts different from the first embodiment will be described in detail.

[0056] As shown in FIG. 9, the battery 7 can be removably attached to the battery mounting portion 41. The mounting surface 7a of the battery 7 mounted on the battery mounting portion 41 is inclined with respect to the driving direction. Specifically, the mounting surface 7a is inclined forward and upward, that is, inclined forward toward the upper side. The rear surface 7b of the battery 7 is also inclined forward and upward. The battery mounting portion 41 has a lower portion 41a that faces the lower surface of the battery 7. The lower portion 41a extends in a direction substantially perpendicular to the mounting surface 7a. The lower portion 41a is inclined upward toward the rear. The rear surface 30b of the magazine 30 is aligned vertically at substantially the same front-to-rear position as the rear end of the rear surface 7b of the battery 7 and the rear end of the lower portion 41a, and does not protrude at least rearward of the rear end of the rear surface 7b.

[0057] As described above, the rear surface 7b of the battery 7 attached to the battery attachment part 41 is inclined forward and upward as shown in Fig. 9. Therefore, by arranging the controller 8 below the electric motor 20, the degree of freedom of the battery attachment part 41 can be increased. Therefore, for example, when the rear surface 7b of the battery 7 is placed on the ground and the front lower part of the driving nose part 2 is placed facing upward, it is possible to prevent the rear end of the magazine 30 from interfering with the ground surface. This improves the handling of the driving tool 40.

[0058] Various modifications can be made to the driving tools 1 and 40 of the above-described embodiments. The driving tools 1 and 40 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 that is 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.

[0059] Although a nail is exemplified as the driving tool N, it may be, for example, a driving tool capable of ejecting a U-shaped staple. A concrete workpiece W is exemplified as an object into which the driving tool N is driven. Alternatively, for example, wood or other material may be used as the object.

[0060] A configuration in which the driving nose portion 2 also functions as a contact arm has been exemplified. Alternatively, a configuration may be provided in which a driving nose portion that does not move in the vertical direction and a contact arm that is separate from the driving nose portion and can move in the vertical direction. A cylindrical driving nose portion 2 has been exemplified. Alternatively, for example, the driving nose portion may be a rectangular tube, an elliptical tube, or the like. The driving nose portion may have a width of 15 millimeters or less in at least one direction. For example, the driving nose portion may have a width of 15 millimeters or less in the front-to-back direction or the left-to-right direction.

[0061] In the illustrated example, the magazine 30 extends straight rearward from the driver guide 17. Alternatively, for example, the magazine may be inclined to the left or right as it moves rearward from the driver guide 17. In the illustrated example, the magazine support portion 11e is disposed along the left side surface 30c of the magazine 30. Alternatively or in addition, a magazine support portion may be disposed on the main body housing 11 along the right side surface 30c of the magazine 30.

[0062] In the illustrated embodiment, the controller 8 has an upper surface 8a and a lower surface 8b that extend straight in the front-rear direction along the motor axis of the electric motor 20. Alternatively, the controller 8 may extend, for example, generally in the front-rear direction and be inclined up and down with respect to the motor axis. Alternatively, the controller 8 may extend, for example, generally in the front-rear direction and be inclined left and right.

[0063] In the illustrated configuration, the elastic member 9 is interposed between the upper surface 8a of the controller 8 and the upper surface of the motor housing 11a, and between the lower surface 8b and the lower surface of the main body housing 11. Alternatively, the elastic member 9 may be interposed in only one of the spaces. By interposing the elastic member 9 in both spaces, the transmission of impact to the controller 8 can be further suppressed. [Explanation of symbols]

[0064] 1...Driving tool 2...Injection nose part (nose part, contact arm), 2a...Injection port 3... Drive-in passage 4. Grip 5...Trigger, 5a...Trigger switch 6: Battery mounting section, 6a: Lower section 7...battery, 7a...mounting surface, 7b...rear surface 8...Controller, 8a...Top (long side), 8b...Bottom (long side), 8c...Front, 8d...Rear 9...Elastic member 10...Tool body 11...main body housing, 11a...motor housing, 11b...gear housing 11c... lifter housing, 11d... window portion, 11e... magazine support portion 12...Cylinder 13...pressure accumulator, 13a...air chamber 14…Piston 15...driver, 15a...rack teeth (engaged portion), 15b...tip 16…Cushion 17. Driver's Guide 20...Electric motor 21...Planetary reduction mechanism 22...Lift mechanism 23…Wheels 24...Engagement part, 24a...Final engagement part 30...Magazine, 30a...Bottom surface, 30b...Rear surface, 30c...Side surface, 30d...Top opening 31…Magazine cap 32... Pusha 33...Spiral spring 34: contact plate; 34a: spring receiving portion; 34b: compression spring 35...adjuster, 35a...rotating shaft, 35b...compression spring 36...plate spring, 36a...first piece, 36b...second piece 37...switch, 37a...protruding pin 40...Driving tool 41: battery mounting portion, 41a: lower portion C1...lower position, C2...upper position L... (Nose part) protruding length D...(nose) diameter N…Driving tool W…Material to be driven

Claims

1. It is a driving tool, A tool body equipped with a driver that moves downwards to strike the driving tool, A grip extending rearward from the tool body, A battery mounting section is provided at the rear of the grip, and a battery mounting section is provided at the rear of the grip to which a battery can be attached. Below the grip, extending rearward from the tool body, is a motor housing that houses an electric motor for moving the screwdriver, A driving tool having a controller positioned below the electric motor for controlling the operation of the electric motor.

2. The driving tool according to claim 1, A driving tool in which the long side of the box-shaped controller is aligned in the front-to-back direction.

3. A driving tool according to claim 1 or 2, A driving tool in which an elastic member is interposed between the upper surface, the lower surface, or both of the controller and the motor housing.

4. The driving tool according to Claim 1, The tool has a magazine that houses the driving tool and extends rearward from the lower part of the tool body, A driving tool in which the controller is positioned between the magazine and the electric motor.

5. The driving tool according to claim 4, A driving tool in which the rear surface of the magazine is flush with or in front of the rear surface of the battery attached to the battery mounting portion.

6. A driving tool according to claim 4 or 5, The tool body has a nose portion that is provided at the lower part so as to be movable up and down and has an ejection port for the driving tool, The aforementioned nose portion is a driving tool that protrudes 40 millimeters or more downward from the magazine when in the upward position.

7. The driving tool according to claim 6, The aforementioned nose portion is a driving tool having a width of 15 millimeters or less in at least one direction.

8. A driving tool according to claim 4 or 5, A driving tool having a magazine support portion that protrudes from the motor housing along the side of the magazine.

9. A driving tool according to claim 1 or 2, A driving tool in which the rear surface of the battery attached to the battery mounting section is inclined forward and upward.

10. A driving tool according to claim 1 or 2, The driving tool is provided with a piston that moves downward together with the driver due to the gas pressure inside the cylinder, and a lift mechanism that moves the driver upward to increase the gas pressure.

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