Driving tool

Abstract

To provide a driving tool capable of efficiently cooling a solenoid for feeding a driving tool in a magazine to a driving passage.SOLUTION: A driving tool 1 has a driver 16 in which a driving source for generating power for moving in a driving direction is a motor 20. The driving tool 1 has a driver guide 4 for movably guiding the driver 16. The driving tool 1 has a magazine 26 for accommodating the driving members n. The driving tool 1 has a feed claw 31 for supplying the driving tool n from the magazine 26 to the driver guide 4. The driving tool 1 has a power transmission member 35 interlocked with the feed claw 31. The driving tool 1 has a solenoid 36 that drives the feed claw 31 via the power transmission member 35. The solenoid 36 is provided in a body housing 11 outside the magazine 26.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present disclosure relates to a driving tool for driving a driving member into a driven member.

Background Art

[0002] The driving tool described in Patent Document 1 includes a driver for striking a driving member, a lift mechanism for moving the driver to a standby position or top dead center, and a motor as a drive source for the lift mechanism. The driver, the lift mechanism, and the motor are installed inside the main body housing of the driving tool. The driving tool has a magazine for accommodating driving members and a feeding mechanism for feeding the driving members one by one from the magazine to a driving passage through which the driver moves. The magazine is connected to a driver guide that forms a driving passage below the tool body. The magazine is cylindrical. The magazine accommodates, for example, a plurality of coil nails connected by wires and wound in a spiral shape.

[0003] The feeding mechanism is provided, for example, between the magazine and the driver guide outside the main body housing. The feeding mechanism has a feeding claw for feeding the coil nails one by one toward the driving passage and a check claw for restricting the fed coil nail from returning to the magazine. The feeding claw is constantly biased toward the driving passage side by, for example, a compression spring. The feeding mechanism has a structure for moving the feeding claw in a direction opposite to the biasing direction of the compression spring and has, for example, a solenoid. When the solenoid is turned on, the feeding claw moves in the reverse feeding direction to receive the next coil nail. Then, when the solenoid is turned off, the feeding claw moves in the feeding direction together with one coil nail. Thus, the coil nails can be supplied to the driving passage one by one.

[0004] A solenoid for sending a conventional driving tool was provided, for example, inside a magazine or inside a housing between the magazine and a driver guide. When the solenoid is turned on, a large current flows through the coil of the solenoid. Therefore, the coil generates heat. A fan that can rotate integrally with the output shaft is attached to the motor housed in the main body housing. The wind generated by the rotation of the fan mainly cools the tool main body electrical components such as the motor. Therefore, it is difficult to cool the solenoid provided outside the main body housing by the rotation of the fan. Therefore, there was room for improvement to enhance the cooling efficiency of the solenoid.

[0005] In a conventional driving tool, the plunger of the solenoid requires a stroke of the same length as the distance for moving the feed claw in the reverse feed direction. Therefore, there was room for improvement to shorten the reciprocating time of the plunger. Also, when the stroke of the plunger becomes long, when the protruding amount of the plunger is large, the length of the plunger (iron core) inserted into the coil becomes short. Therefore, when the protruding amount of the plunger is large, the output of the solenoid becomes low. Therefore, there was room for improvement to maintain the output of the solenoid at a high level.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] Therefore, there is a need for a driving tool that can efficiently cool the solenoid for sending the driving tool in the magazine to the driving passage.

Means for Solving the Problems

[0008] According to one feature of the present disclosure, the driving tool has a driver in which the driving source for generating power to move in the driving direction is a motor. The driving tool has a driver guide that movably guides the driver. The driving tool has a magazine that houses the driving tool. The driving tool has a feed pawl that supplies the driving tool from the magazine to the driver guide. The driving tool has a power transmission member that interlocks with the feed pawl. The driving tool has a solenoid that drives the feed pawl via the power transmission member. The solenoid is provided in the main body housing outside the magazine.

[0009] Therefore, a solenoid for sending the driving tool in the magazine to the driving passage in the driver guide is provided in the main body housing. Thereby, for example, the solenoid can be arranged on the flow path of the cooling air that cools the motor. Thereby, the solenoid can be efficiently cooled, and the temperature rise of the solenoid can be suppressed. Further, by providing a power transmission member between the solenoid and the feed pawl, the output of the solenoid can be efficiently transmitted to the feed pawl.

Brief Description of the Drawings

[0010]

Figure 1

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Figure 19

Embodiments for Carrying Out the Invention

[0011] According to another feature of the present disclosure, the power transmission member is supported by the main body housing so as to be rotatable about the rotation support portion and is connected to the feed claw by the claw connection portion. The plunger of the solenoid is connected to the power transmission member between the rotation support portion and the claw connection portion. Therefore, the power transmission member is interposed between the plunger of the solenoid and the feed claw. Moreover, the plunger is connected to the power transmission member between the rotation support portion and the claw connection portion. Therefore, by utilizing the lever principle, the feed claw can be moved with a short stroke of the plunger. Thereby, the operation of the feed claw can be speeded up. Further, by shortening the stroke of the plunger, the length of the plunger inserted into the coil can be maintained even when the plunger protrudes or retracts most. Therefore, the output of the solenoid can be maintained high.

[0012] According to another feature of the present disclosure, the driving tool is provided with a biasing member that biases the feed claw toward the driver guide. The solenoid moves the feed claw in a direction opposite to the biasing direction of the biasing member when in the on state. Therefore, the feed claw is constantly biased toward the driver guide side (feeding direction) by the biasing member. The solenoid becomes on only when going to receive the next driving tool. Therefore, while shortening the driving time of the solenoid, the driving tools can be surely supplied one by one into the driving passage in the driver guide.

[0013] According to another feature of the present disclosure, the main body housing includes a motor housing that houses the motor. The solenoid is housed in the motor housing and is disposed between the motor and the magazine. Therefore, by housing the solenoid and the motor in the motor housing, the solenoid and the motor can be cooled together by one cooling mechanism such as a fan, for example. Further, the arrangement of the magazine with respect to the main body housing is set according to the position where the driving tool is supplied into the driver guide. Therefore, it is necessary to provide a space between the motor and the magazine. By arranging the solenoid using this space, the driving tool can be provided compactly.

[0014] According to another feature of the present disclosure, the driving tool has a fan that generates wind within the main body housing. The solenoid is provided in an air passage through which the wind generated by the fan flows. Therefore, by arranging the solenoid in the air passage, the cooling efficiency of the solenoid can be enhanced.

[0015] According to another feature of the present disclosure, the solenoid is provided upstream of the air passage with respect to the motor. Therefore, the cooling air first cools the solenoid and then cools the motor. Since the motor of the driving tool is only driven when moving the driver to the standby position or moving it to the top dead center, the driving time is short. Although the driving time of the solenoid is short, the amount of heat generated in the coil is large. By cooling the solenoid with a larger amount of heat generated first, the cooling efficiency of the electrical components including the solenoid and the motor can be enhanced.

[0016] According to another feature of the present disclosure, the main body housing includes a motor housing that houses the motor. The motor housing has a motor accommodation chamber that houses the motor and a solenoid accommodation chamber that houses the solenoid. The motor accommodation chamber and the solenoid accommodation chamber are communicated by a communication passage. Therefore, an air passage can be provided so that the wind for cooling the motor and the solenoid passes through the communication passage. Thus, the flow of the wind can be induced so that the cooling efficiency of the motor and the solenoid is increased.

[0017] According to another feature of the present disclosure, the main body housing has an air inlet in at least one of a first wall that penetrates the plunger of the solenoid or a second wall that faces the coil of the solenoid. Therefore, the air inlet is provided at a position where the taken-in outside air easily hits the coil of the solenoid. Thereby, the cooling efficiency of the solenoid can be enhanced.

[0018] According to another feature of the present disclosure, the air passage includes a first air passage through which the cooling air that cools the motor from the outside flows, and a second air passage that is communicated with the first air passage and through which the cooling air passes inside the motor. Therefore, by cooling the motor from both the outside and the inside, the cooling efficiency of the motor can be enhanced.

[0019] According to another feature of the present disclosure, the driving tool has a piston to which a driver is connected. The driving tool has a cylinder in which the piston is movably provided. The driver is returned in the reverse driving direction by a motor to increase the gas pressure in the cylinder. Therefore, in a so-called gas spring type driving tool, the solenoid for feeding the driving tool can be arranged at a position with high cooling efficiency.

[0020] Next, a first embodiment of the present disclosure will be described with reference to FIGS. 1 to 14. As an example of the driving tool 1, a gas spring type driving tool that uses the gas pressure in the accumulator chamber as the thrust for driving the driving tool is illustrated. In the following description, the driving direction of the driving tool is downward, and the reverse driving direction is upward. The user of the driving tool 1 is generally located on the right side of the driving tool 1 in FIG. 1. The front side of the user is the rear direction, and the back side opposite to the front side is the front direction. The left and right directions are based on the user.

[0021] As shown in FIGS. 2 and 3, the driving tool 1 has a tool body 10 and a body housing 11 that covers the tool body 10. A cylinder 13 extending in the vertical direction is accommodated in the body housing 11. A piston 15 is accommodated in the cylinder 13 so as to be reciprocable up and down. A vertically long driver 16 is connected to the lower surface of the piston 15. An accumulator chamber 14 is communicated with the upper end of the cylinder 13. Compressed gas such as air is enclosed in the accumulator chamber 14. The gas pressure in the accumulator chamber 14 acts as a thrust for urging the upper surface of the piston 15 to move downward.

[0022] As shown in FIGS. 5 and 6, the right part of the accumulator chamber 14 is communicated with an air chamber 14a extending downward. The air chamber 14a extends downward along the right side surface of the cylinder 13. The air chamber 14a overlaps with a lift mechanism 23 described later in the left and right directions and is provided above the lift mechanism 23. By providing the air chamber 14a on the right side of the cylinder 13, the capacity of the accumulator chamber 14 including the air chamber 14a can be increased while suppressing the increase in the size of the tool body 10 in the vertical direction.

[0023] As shown in FIGS. 1 to 6, a driving nose portion 2 is provided at the lower part of the tool body 10. The driving nose portion 2 has a driver guide 4 that extends generally in the vertical direction. Inside the driver guide 4, driving passages 2a and 2b that extend in the vertical direction are provided. The upper driving passage 2b and the lower driving passage 2a communicate with each other. The upper driving passage 2b is formed in a substantially rectangular shape with a size that allows the driver 16 to be inserted in the vertical direction. The upper end of the upper driving passage 2b communicates with the lower part of the cylinder 13. The lower driving passage 2a is formed in a substantially cylindrical shape that is wider than the upper driving passage 2b. The lower driving passage 2a is provided with a diameter that is substantially the same as or slightly larger than that of a substantially cylindrical striker 17 that is attached to the tip (lower end) 16b of the driver 16. The lower end of the lower driving passage 2a opens downward as a shooting outlet 2c.

[0024] As shown in FIGS. 2 to 6, the driving nose portion 2 has a contact arm 3 that abuts against the material W to be driven. The contact arm 3 is movable in the vertical direction between a lower position C1 and an upper position C2 with respect to the driver guide 4. The contact arm 3 is biased toward the lower position C1 by a compression spring 41b provided at the front part of the tool body 10. With the lower end of the contact arm 3 abutting against the material W to be driven, the tool body 10 is further moved closer to the material W to be driven. As a result, the contact arm 3 is pushed by the material W to be driven and moves from the lower position C1 to the upper position C2. The lower end of the contact arm 3 moves to a position substantially the same as the shooting outlet 2c when at the upper position C2.

[0025] As shown in FIGS. 5 and 6, the lower part of the driver 16 enters the driving passages 2a and 2b. The driver 16 moves downward by the gas pressure in the accumulator chamber 14 acting on the upper surface of the piston 15. The striker 17 attached to the tip 16b of the driver 16 strikes the head na of one driving tool n loaded in the driving passage 2a when it moves to the driving position. The struck driving tool n moves downward in the driving passage 2a and is ejected from the ejection port 2c. The ejected driving tool n is driven into the material W to be driven. A substantially cylindrical cushion 18 for absorbing the impact at the bottom dead center of the piston 15 is provided on the lower inner side of the cylinder 13.

[0026] As shown in FIGS. 5 and 6, a plurality of rack teeth (engaged portions) 16a protruding rightward are provided on the right side of the driver 16. In this embodiment, six rack teeth 16a are arranged side by side in the vertical direction which is the longitudinal direction of the driver 16. Each rack tooth 16a is provided in a substantially triangular shape with the bottom facing downward in the driving direction in a front view. The bottom of the rack tooth 16a engages with the engaging portion 25 of the lift mechanism 23.

[0027] As shown in FIGS. 1 to 4, a grip 5 extending rearward and grippable by the user is provided at the rear of the tool body 10. A trigger 6 that the user pulls with a fingertip is provided on the lower front surface of the grip 5. A trigger switch 6a that switches from an off state to an on state in response to the pulling operation of the trigger 6 is provided inside the grip 5. When the driving nose portion 2 is pressed against the material W to be driven and moves from the lower position C1 to the upper position C2 (see FIG. 6), the pulling operation of the trigger 6 becomes effective.

[0028] As shown in FIGS. 1 to 4, a battery attachment portion 7 extending in the vertical direction is provided on the rear surface of the grip 5. A battery 8 can be detachably attached to the battery attachment portion 7. The battery 8 can be repeatedly charged with a charger prepared separately after being removed from the battery attachment portion 7. The battery 8 can be diverted as a power source for other power tools. The battery 8 supplies power to the motor 20 and the like described later.

[0029] As shown in FIGS. 2 to 4, a controller 9 that mainly controls the drive of the motor 20 is accommodated in the battery mounting portion 7. The controller 9 is provided with a control board accommodated in a shallow rectangular box-shaped case. The controller 9 is disposed in front of the battery 8 mounted on the battery mounting portion 7. The controller 9 is disposed in a posture where the longest side extends substantially in the vertical direction and the shortest side extends substantially in the front-rear direction. An air intake port 7a that penetrates the inside and outside of the battery mounting portion 7 is provided above the controller 9 on the upper surface of the battery mounting portion 7.

[0030] As shown in FIGS. 1 to 4, the main body housing 11 has a substantially cylindrical mechanism case (motor housing) 12 that extends in the front-rear direction below the grip 5. The rear portion of the mechanism case 12 is connected to the lower portion of the battery mounting portion 7. A motor housing chamber 12a for housing the motor 20 is provided at the rear portion of the mechanism case 12. A gear portion housing chamber 12h for housing the planetary reduction mechanism 22 is provided in front of the motor housing chamber 12a. Exhaust ports 12f that penetrate the inside and outside are provided on the left and right side surfaces of the gear portion housing chamber 12h. A lifter housing chamber 12i for housing the lift mechanism 23 is provided in front of the gear portion housing chamber 12h. The motor housing chamber 12a, the gear portion housing chamber 12h, and the lifter housing chamber 12i are arranged in the extending direction of the output axis J that extends in the front-rear direction. The grip 5, the battery mounting portion 7, and the mechanism case 12 cooperate to form a loop shape.

[0031] As shown in FIGS. 2 to 4, the mechanism case 12 has a solenoid housing chamber 12b below the motor housing chamber 12a and the gear portion housing chamber 12h. A solenoid 36 described later is housed in the solenoid housing chamber 12b. The solenoid housing chamber 12b is vertically partitioned from the motor housing chamber 12a and the gear portion housing chamber 12h by the lower surface of the motor housing chamber 12a and the lower surface of the gear portion housing chamber 12h. The rear portion of the solenoid housing chamber 12b and the lower portion of the battery mounting portion 7 are communicated with the motor housing chamber 12a through a communication passage 12g provided behind the motor housing chamber 12a. The motor housing chamber 12a is communicated with the gear portion housing chamber 12h in the front-rear direction.

[0032] As shown in FIGS. 1 to 4, the solenoid housing chamber 12b is provided in a substantially rectangular box shape. The solenoid 36 is housed in the front part of the solenoid housing chamber 12b. The plunger 36a of the solenoid 36 extends in a direction inclined downward and forward with respect to the output axis J. The solenoid housing chamber 12b has a first wall 12c on the front side facing the driving nose portion 2 and a second wall 12d on the lower side facing the magazine 26 described later. The plunger 36a projects out of the solenoid housing chamber 12b from the center of the first wall 12c. An air inlet 12e penetrating the solenoid housing chamber 12b inside and outside is provided in the second wall 12d. The air inlet 12e is arranged side by side with the solenoid 36 vertically. The specific configuration of the solenoid 36 will be described in detail later.

[0033] As shown in FIGS. 2 and 3, the motor 20 has an output shaft 20a extending in the front-rear direction on the output axis J. The rear part of the output shaft 20a is rotatably supported by a bearing 20b. The front part of the output shaft 20a is rotatably supported by a bearing (not shown) in the planetary reduction mechanism 22. A fan 21 is attached to the front part of the output shaft 20a and behind the planetary reduction mechanism 22. By rotating the fan 21 integrally with the output shaft 20a, cooling air flows from the rear to the front in the motor housing chamber 12a. Three rows of planetary gear trains are used in the planetary reduction mechanism 22. The rotational drive of the output shaft 20a of the motor 20 is decelerated by the planetary reduction mechanism 22 and transmitted to the lift mechanism 23.

[0034] As shown in FIGS. 5 and 6, the lift mechanism 23 is provided on the right side of the driving nose portion 2. The lift mechanism 23 moves the driver 16 and the piston 15 upward against the air pressure in the accumulator chamber 14. The lift mechanism 23 has a wheel 24 rotatable around the output axis J. The wheel 24 is rotatable counterclockwise when viewed from the front, and the rotation in the clockwise direction is restricted. A plurality of engaging portions 25 are provided along the outer peripheral edge of the wheel 24. In this embodiment, for example, six engaging portions 25 are arranged at intervals in the circumferential direction of the wheel 24. For example, a columnar pin extending in the front-rear direction is used for the engaging portion 25. As the wheel 24 rotates, each engaging portion 25 moves around the output axis J.

[0035] As shown in FIGS. 5 and 6, the left part of the wheel 24 enters the driving-in passage 2b of the driver guide 4 through a window portion 12j provided in the left part of the lifter accommodation chamber 12i. Each engaging portion 25 of the wheel 24 engages with the bottom of the rack teeth 16a of the driver 16 in the driving-in passage 2b. With at least one of the engaging portions 25 engaged with the bottom of any of the rack teeth 16a, the wheel 24 rotates in the counterclockwise direction when viewed from the front. As a result, the driver 16 and the piston 15 move upward. The upward movement of the piston 15 increases the gas pressure in the accumulator chamber 14.

[0036] As shown in FIG. 4, a dial-type adjuster 41 is provided at the front part of the driving-in nose portion 2. The adjuster 41 has a rotary shaft 41a extending in the vertical direction. The rotary shaft 41a is integrally rotatable with the adjuster 41 and movable in the vertical direction. An adjuster connecting portion 3a connected to the adjuster 41 is provided at the upper part of the contact arm 3. The contact arm 3 is integrally movable in the vertical direction with the adjuster 41. By rotating the adjuster 41 about its axis, the vertical position of the contact arm 3 can be adjusted. The adjuster 41 has a compression spring 41b disposed on the outer peripheral side of the rotary shaft 41a and supported by the main body housing 11. The compression spring 41b biases the adjuster 41 and the contact arm 3 downward. Therefore, the contact arm 3 is normally located at the lower position C1.

[0037] As shown in Fig. 4, a contact plate 42 is integrally connected to the upper part of the adjuster 41. Above the contact plate 42, a plate-shaped spring 43 and a switch 44 are provided. When the contact arm 3 moves from the lower position C1 to the upper position C2 (see Fig. 6), the contact plate 42 also moves upward via the adjuster 41. The upper end of the contact plate 42 presses the protruding pin 44a of the switch 44 via the spring 43. As a result, the switch 44 is turned on and sends an on-signal to the controller 9. When the on-signal is sent to the controller 9, the pulling operation of the trigger 6 becomes effective. When the contact arm 3 is in the lower position C1, the contact plate 42 does not move upward and the protruding pin 44a of the switch 44 is not pressed. Therefore, the switch 44 does not send an on-signal and the pulling operation of the trigger 6 is not effective.

[0038] As shown in Figs. 1 to 4, a substantially cylindrical magazine 26 is provided behind the driving nose portion 2. The magazine 26 is provided in a posture with its substantially cylindrical axial direction generally oriented in the vertical direction. The magazine 26 is provided with a split structure of a right portion 26a and a left portion 26b. A support shaft 26c is provided between the left end of the lower surface of the right portion 26a and the right end of the lower surface of the left portion 26b. The left portion 26b can be opened and closed by rotating about the support shaft 26c with respect to the right portion 26a. By opening the left portion 26b, a connected driving tool N in which a plurality of driving tools n are connected can be loaded into the magazine 26. By closing the left portion 26b, the connected driving tool N can be held in the magazine 26. The driver guide 4 has a flat feed guide portion 4a extending rearward from the driving nose portion 2. The front portion of the right portion 26a of the magazine 26 is connected to and supported by the feed guide portion 4a. The rear portion of the right portion 26a of the magazine 26 is connected to and supported by a region behind the mechanism case 12 of the main body housing 11.

[0039] As shown in FIGS. 7 to 9, a connecting driving tool N called a so-called coil nail has a plurality of driving tools n and a connecting member m that connects each driving tool n. The driving tool n is, for example, a nail with a circular head na. The connecting member m is, for example, a wire made of metal. The connecting member m connects a plurality of driving tools n in a state where they are arranged at a predetermined interval in a direction substantially orthogonal to the longitudinal direction. The connecting driving tool N is housed in the magazine 26 in a state of being wound in a spiral shape. The driving tool n at one end of the connecting driving tool N is guided forward from the magazine 26 and held by a feeding mechanism 30 provided between the magazine 26 and the driving nose portion 2.

[0040] As shown in FIGS. 7 to 12, the feeding mechanism 30 has a feeding claw 31 that feeds the driving tool n forward toward the driving passage 2a. The feeding mechanism 30 has a biasing member 32 that biases the feeding claw 31 forward. The biasing member 32 is, for example, a coil-shaped compression spring. A spring receiving portion 26d that holds the rear end of the compression spring 32 is provided at the front portion of the right portion 26a of the magazine 26. The feeding mechanism 30 has a solenoid 36 that moves the feeding claw 31. Power supply or power cut-off from the battery 8 to the solenoid 36 is performed according to a signal from the controller 9 (see FIG. 2). When in the off state where power supply to the solenoid 36 is cut off, the feeding claw 31 is biased forward toward the driving passage 2a side by the compression spring 32. When power is supplied to the solenoid 36 and it is in the on state, the feeding claw 31 moves toward the rear magazine 26 side against the biasing force of the compression spring 32.

[0041] As shown in FIG. 2, the solenoid 36 is housed in a solenoid housing chamber 12b provided in the mechanism case 12 above the magazine 26. In other words, the solenoid 36 is not provided in the magazine 26 and is also not provided in the feeding passage of the driving tool n formed between the magazine 26 and the driver guide 4 in the front-rear direction.

[0042] As shown in FIGS. 7 to 9 and 13 to 14, the solenoid 36 has a rectangular box-shaped holder 36c and a plunger 36a that protrudes forward from the holder 36c. A through-hole through which the plunger 36a is inserted is provided in the front surface of the holder 36c. The lower and upper surfaces of the holder 36c are open. A coil 36b is accommodated in the holder 36c. The plunger 36a is inserted through the coil 36b. The coil 36b is adjacent to an air intake 12e provided in the second wall 12d of the solenoid accommodation chamber 12b.

[0043] As shown in FIGS. 7 to 9 and 13 to 14, the feed mechanism 30 has a power transmission member 35 that moves by driving the solenoid 36. The feed claw 31 moves in the front-rear direction in conjunction with the movement of the power transmission member 35. The power transmission member 35 is provided on a plate-like member that extends generally in the vertical direction. At the upper end of the power transmission member 35, a rotation support portion 35a that is the rotation center of the power transmission member 35 is provided. The rotation support portion 35a is rotatably supported by the driver guide 4 via a shaft member that extends in the left-right direction.

[0044] As shown in FIGS. 7 to 9 and 13 to 14, at the lower end of the power transmission member 35, a claw connection portion 35c that is connected to the rear portion of the feed claw 31 is provided. On the rear surface of the claw connection portion 35c, a spring receiving portion 35d that receives the front end of the compression spring 32 is provided. The power transmission member 35 and the feed claw 31 are biased forward by the compression spring 32 via the spring receiving portion 35d. The power transmission member 35 has a thick portion 35e behind the claw connection portion 35c. The thick portion 35e is provided to be thicker in the front-rear direction than the claw connection portion 35c. By providing the thick portion 35e, the rigidity of the power transmission member 35 can be improved against the biasing force of the compression spring 32 and the driving force of the solenoid 36.

[0045] As shown in FIGS. 7 to 9 and 13 to 14, the power transmission member 35 has a plunger connecting portion 35b connected to the front end of the plunger 36a. The plunger connecting portion 35b is provided midway between the rotation support portion 35a and the claw connecting portion 35c in the vertical direction. For example, the distance from the rotation support portion 35a to the plunger connecting portion 35b is approximately half of the distance from the rotation support portion 35a to the claw connecting portion 35c. Therefore, the amount of movement of the plunger 36a is approximately half of the amount of movement of the feed claw 31.

[0046] As shown in FIGS. 10 to 14, the left end of the feed claw 31 is provided in a substantially U shape. A feed inclined surface 31a is provided at the front portion of the left end of the feed claw 31. The feed inclined surface 31a is provided so as to incline forward as it goes leftward with the left rear as the perpendicular direction. A receiving surface 31b facing the feed inclined surface 31a is provided at the rear portion of the left end of the feed claw 31. The receiving surface 31b extends substantially horizontally in the left-right direction with the front as the perpendicular direction. The lower right portion of the feed claw 31 is rotatably connected to the claw connecting portion 35c of the power transmission member 35 via a rotation support shaft 31c extending in the vertical direction. The feed claw 31 has a torsion spring 31d that biases the feed claw 31 about the axis of the rotation support shaft 31c. The torsion spring 31d biases the feed claw 31 in the clockwise direction when viewed from below.

[0047] As shown in FIGS. 7 to 12, the feeding mechanism 30 has a check claw 33 that prevents the driving tool n fed forward by the feed claw 31 from returning rearward from the driving passage 2a. A check inclined surface 33a is provided at the front portion of the check claw 33. The check inclined surface 33a is provided so as to incline forward as it goes rightward with the right rear as the perpendicular direction. A plate-shaped guide member 34 extending in the front-rear direction and the vertical direction is provided between the driving passage 2a and the magazine 26 in the front-rear direction. The guide member 34 extends substantially parallel to the feed guide portion 4a to the left of the feed guide portion 4a. The lower portion of the check claw 33 is rotatably connected to the guide member 34 via a rotation support shaft 33b extending in the vertical direction. The check claw 33 is biased in the counterclockwise direction when viewed from below by a spring (not shown).

[0048] As shown in Fig. 1, a feed passage for feeding the driving tool n from the magazine 26 to the driving passage 2a is formed between the feed guide portion 4a and the guide member 34 in the left-right direction. The feed claw 31 is inserted into a hole 4b penetrating the feed guide portion 4a in the left-right direction and protrudes from the right side to the left side toward the feed passage. The check claw 33 is inserted into a hole 34a penetrating the feed guide portion 4a in the left-right direction and protrudes from the left side to the right side toward the feed passage (see Fig. 8).

[0049] Next, a series of flows of the driving operation of the driving tool 1 will be described with reference to Figs. 3 to 12. Figs. 3, 5, 7, and 10 show the state in which the driver 16 is moved upward to the standby position and before the driving tool n is loaded into the driving passage 2a. Figs. 6, 9, and 12 show the state when the driving tool n is loaded into the driving passage 2a. The driver 16 at the standby position stops slightly below the top dead center. When the driver 16 is at the standby position, the bottom surface of the second rack tooth 16a from the bottom and the engaging portion 25 one step before (counterclockwise side in the figure) the final engaging portion 25a of the lift mechanism 23 are engaged with each other.

[0050] When the contact arm 3 is pressed against the material W to be driven, it moves from the lower position C1 to the upper position C2. The contact plate 42 connected to the adjuster 41 moves upward in conjunction with the contact arm 3. When the contact plate 42 moves upward, the protruding pin 44a of the switch 44 is pushed through the spring 43. The switch 44 sends an on signal to the controller 9. The controller 9 starts the motor 20 when it receives the on signal from the switch 44 and the trigger 6 is pulled. When the motor 20 is started, the wheel 24 of the lift mechanism 23 rotates. As a result, the rack tooth 16a engaged with the engaging portion 25 moves upward, and the driver 16 moves upward from the standby position to the top dead center.

[0051] Before the driver 16 moves upward from the standby position to the top dead center, the feeding mechanism 30 loads the foremost driving tool n into the driving passage 2a. Immediately before the lower end of the striker 17 attached to the tip 16b of the driver 16 moves upward and exceeds the head na of the driving tool n (see Fig. 8), power is supplied to the solenoid 36. The plunger 36a moves rearward together with the plunger connecting portion 35b of the power transmission member 35. The power transmission member 35 rotates rearward about the rotation support portion 35a. The feed pawl 31 moves rearward against the biasing force of the compression spring 32 in conjunction with the rearward movement of the pawl connecting portion 35c of the power transmission member 35.

[0052] When the feed pawl 31 moves rearward, it is pushed by the driving tool n held by the feed inclined surface 31a of the feed pawl 31. Therefore, the feed pawl 31 retracts rightward away from the driving tool n against the biasing force of the torsion spring 31d. When the plunger 36a moves to the rearmost position, the feed pawl 31 rotates leftward to the position of the driving tool n, biased by the torsion spring 31d. As a result, the second driving tool n from the front is sandwiched between the feed inclined surface 31a and the receiving surface 31b of the feed pawl 31. The foremost driving tool n is positioned immediately behind the striker 17 and is held by the front surface of the check pawl 33 so as not to move rearward.

[0053] When the lower end of the striker 17 moves upward beyond the head na of the driving tool n (see Fig. 9), the power supply to the solenoid 36 is cut off. The power transmission member 35 is urged by the compression spring 32 and rotates forward about the rotary support portion 35a. The feed pawl 31 moves forward while sandwiching the second driving tool n from the front. The check pawl 33 is pushed by the driving tool n moving from the rear to the front and retracts leftward away from the driving tool n against the biasing force of the spring. Therefore, the feed pawl 31 can smoothly move the connected driving tools N including the sandwiched driving tool n forward. When the connected driving tools N move forward, the foremost driving tool n can be loaded into the driving passage 2a before the driver 16 moves to the top dead center. The check pawl 33 is urged by the spring and rotates rightward to the position of the driving tool n. Thereby, the return of the connected driving tools N to the rear side of the magazine 26 can be restricted.

[0054] When the driver 16 moves upward to the top dead center and reaches the state just before driving, the final engagement portion 25a is disengaged from the bottom of the lowermost rack tooth 16a by the rotation of the wheel 24. The driver 16 is urged by the gas pressure in the accumulator chamber 14 applied to the piston 15 and moves downward. The striker 17 strikes the head na of the driving tool n in the driving passage 2a. The struck driving tool n is ejected from the ejection port 2c to the material W to be driven. The connecting member m connecting the ejected driving tools n is sheared by the impact when the driver 16 strikes. When the driver 16 moves downward, all the engagement portions 25 are retracted to the right of the driving passage 2b. Therefore, interference between the rack teeth 16a of the downward-moving driver 16 and the engagement portions 25 is avoided, and a smooth driving operation is performed.

[0055] The wheel 24 continues to rotate even while the driver 16 is moving downward and after reaching the bottom dead center. When the driver 16 is at the bottom dead center and the wheel 24 rotates by a predetermined rotation angle, one of the engaging portions 25 engages with the bottom of the uppermost rack tooth 16a. Thereby, a return operation to move the driver 16 upward is started. The next driving tool n of the ejected driving tools n is sandwiched between the feed inclined surface 31a and the receiving surface 31b of the feed pawl 31 and held by the front surface of the check pawl 33. Thereby, the next driving tool n is positioned immediately behind the driving passage 2a. An arcuate surface 17a following the shape of the head na of the driving tool n is provided on the rear surface of the striker 17. The interference between the striker 17 and the head na of the next driving tool n can be suppressed by the arcuate surface 17a. Therefore, the next driving tool n can be held at a position as close as possible to the driving passage 2a.

[0056] When the wheel 24 rotates and the engaging portion 25 one before the last engaging portion 25a engages with the bottom of the second rack tooth 16a from the bottom, the driver 16 returns to the standby position. For example, by appropriately measuring the time from the start of activation of the motor 20 or by appropriately measuring the rotational position of the wheel 24, the motor 20 is stopped when the piston 15 reaches the standby position. Thereby, the driver 16 is held at the standby position. Thus, a series of driving operations is completed.

[0057] Next, with reference to FIG. 2, the flow of the cooling air in the main body housing 11 will be described. When the motor 20 is activated, the fan 21 rotates integrally with the output shaft 20a. Therefore, cooling air flowing from the rear to the front is generated in the motor housing chamber 12a of the mechanism case 12. A negative pressure is generated in the solenoid housing chamber 12b communicated with the motor housing chamber 12a via the communication passage 12g and inside the battery attachment portion 7, and the cooling air flows.

[0058] First, outside air is taken into the solenoid housing chamber 12b as cooling air through the intake port 12e of the second wall 12d. The cooling air passes between the coil 36b (see FIG. 13) of the solenoid 36 and the inner peripheral surface of the holder 36c, and further passes through the air passage A1 that leads to the rear communication passage 12g. The coil 36b is cooled by the cooling air passing through the air passage A1. The cooling air passes through the air passage A2 that leads from the communication passage 12g to the front motor housing chamber 12a. The motor 20 is cooled by the cooling air passing through the air passage A2. The cooling air is discharged to the outside through the exhaust port 12f provided in the front gear portion housing chamber 12h of the motor housing chamber 12a.

[0059] First, outside air is taken into the inside of the battery attachment portion 7 as cooling air through the intake port 7a at the upper end. The cooling air passes near the controller 9 and further passes through the air passage A3 that leads to the lower communication passage 12g. The controller 9 is cooled by the cooling air passing through the air passage A3. The cooling air passing through the air passage A3 merges with the cooling air passing through the air passage A2 in the communication passage 12g. The cooling air is discharged to the outside through the exhaust port 12f of the gear portion housing chamber 12h.

[0060] As described above, the driving tool 1 has a driver 16 in which the driving source for generating the power to move in the driving direction is the motor 20 as shown in FIGS. 7 to 9. The driving tool 1 has a driver guide 4 that movably guides the driver 16. The driving tool 1 has a magazine 26 that houses the driving tool n. The driving tool 1 has a feed claw 31 that supplies the driving tool n from the magazine 26 to the driver guide 4. The driving tool 1 has a power transmission member 35 that interlocks with the feed claw 31. The driving tool 1 has a solenoid 36 that drives the feed claw 31 via the power transmission member 35. The solenoid 36 is provided in the main body housing 11 outside the magazine 26.

[0061] Therefore, a solenoid 36 for sending the driving tool n in the magazine 26 to the driving passage 2a in the driver guide 4 is provided in the main body housing 11. Thereby, for example, the solenoid 36 can be arranged on the flow path of the cooling air for cooling the motor 20. Thereby, the solenoid 36 can be efficiently cooled, and the temperature rise of the solenoid 36 can be suppressed. Further, by providing a power transmission member 35 between the solenoid 36 and the feed pawl 31, the output of the solenoid 36 can be efficiently transmitted to the feed pawl 31.

[0062] As shown in FIGS. 7 to 9, the power transmission member 35 is supported by the main body housing 11 so as to be rotatable about the rotation support portion 35a and is connected to the feed pawl 31 by the pawl connection portion 35c. The plunger 36a of the solenoid 36 is connected to the power transmission member 35 between the rotation support portion 35a and the pawl connection portion 35c. Therefore, the power transmission member 35 is interposed between the plunger 36a of the solenoid 36 and the feed pawl 31. Moreover, the plunger 36a is connected to the power transmission member 35 between the rotation support portion 35a and the pawl connection portion 35c. Therefore, by utilizing the lever principle, the feed pawl 31 can be moved with a short stroke of the plunger 36a. Thereby, the operation of the feed pawl 31 can be speeded up. Further, by shortening the stroke of the plunger 36a, the length of the plunger 36a inserted into the coil 36b (see FIG. 13) can be maintained even when the plunger 36a protrudes or retracts most. Therefore, the output of the solenoid 36 can be maintained high.

[0063] As shown in FIGS. 7 to 9, the driving tool 1 is provided with a compression spring (biasing member) 32 that biases the feed pawl 31 toward the driver guide 4. The solenoid 36 moves the feed pawl 31 in a direction opposite to the biasing direction of the compression spring 32 when it is in the on state. Therefore, the feed pawl 31 is constantly biased toward the driver guide 4 side (feeding direction) by the compression spring 32. The solenoid 36 is turned on only when going to receive the next driving tool n. Therefore, while shortening the driving time of the solenoid 36, the driving tools n can be reliably supplied one by one to the driving passage 2a in the driver guide 4.

[0064] As shown in FIGS. 2 and 7 to 9, the main body housing 11 includes a mechanism case (motor housing) 12 that houses the motor 20. The solenoid 36 is housed in the mechanism case 12 and is disposed between the motor 20 and the magazine 26. Therefore, by housing the solenoid 36 and the motor 20 in the mechanism case 12, for example, the solenoid 36 and the motor 20 can be cooled together by one cooling mechanism such as the fan 21. Further, the arrangement of the magazine 26 with respect to the main body housing 11 is set by the position where the driving tool n is supplied into the driver guide 4. Therefore, it is necessary to provide a space between the motor 20 and the magazine 26. By arranging the solenoid 36 using this space, the driving tool 1 can be provided in a compact manner.

[0065] As shown in FIG. 2, the driving tool 1 has a fan 21 that generates wind inside the main body housing 11. The solenoid 36 is provided in an air passage A1 through which the wind generated by the fan 21 flows. Therefore, by arranging the solenoid 36 in the air passage A1, the cooling efficiency of the solenoid 36 can be increased.

[0066] As shown in FIG. 2, the solenoid 36 is provided on the upstream side (air passage A1) of the air passage with respect to the motor 20. Therefore, the cooling air first cools the solenoid 36 and then cools the motor 20. The motor 20 of the driving tool 1 is driven only when moving the driver 16 to the standby position or moving it to the top dead center, so the driving time is short. Although the driving time of the solenoid 36 is short, the amount of heat generated in the coil 36b (see FIG. 13) is large. By cooling the solenoid 36 with a larger amount of heat generated first, the cooling efficiency of the electrical component parts including the solenoid 36 and the motor 20 can be increased.

[0067] As shown in FIG. 2, the main body housing 11 includes a mechanism case 12 that houses the motor 20. The mechanism case 12 has a motor housing chamber 12a that houses the motor 20 and a solenoid housing chamber 12b that houses the solenoid 36. The motor housing chamber 12a and the solenoid housing chamber 12b communicate with each other through a communication passage 12g. Therefore, an air passage can be provided so that the air that cools the motor 20 and the solenoid 36 passes through the communication passage 12g. Thus, the flow of the air can be induced so that the cooling efficiency of the motor 20 and the solenoid 36 is increased.

[0068] As shown in FIGS. 1 and 2, the main body housing 11 has an air inlet 12e in a second wall 12d that faces the coil 36b (see FIG. 3) of the solenoid 36. Therefore, the air inlet 12e is provided at a position where the taken-in outside air easily hits the coil 36b of the solenoid 36. Thereby, the cooling efficiency of the solenoid 36 can be enhanced.

[0069] As shown in FIGS. 3, 5, and 6, the driving tool 1 has a piston 15 to which the driver 16 is connected. The driving tool 1 has a cylinder 13 in which the piston 15 is movably provided. The motor 20 returns the driver 16 in the counter-driving direction to increase the gas pressure in the cylinder 13. Therefore, in the so-called gas spring type driving tool 1, the solenoid 36 for feeding the driving tool n can be arranged at a position with high cooling efficiency.

[0070] Next, a second embodiment of the present disclosure will be described with reference to FIGS. 15 and 16. In the main body housing 11 of the driving tool 50 of the second embodiment, a mechanism case (motor housing) 51 is provided instead of the mechanism case 12 shown in FIG. 1. In the following description, only the parts different from the first embodiment will be described in detail. The mechanism case 51 is provided in a substantially cylindrical shape that extends in the front-rear direction below the grip 5. The mechanism case 51 has a motor housing chamber 51a, a gear portion housing chamber 51h, a lifter housing chamber 51i, a solenoid housing chamber 51b, and a communication passage 51g. These configurations are provided in the same manner as the motor housing chamber 12a, the gear portion housing chamber 12h, the lifter housing chamber 12i, the solenoid housing chamber 12b, and the communication passage 12g of the mechanism case 12 shown in FIG. 2.

[0071] As shown in FIGS. 15 and 16, the solenoid 36 is housed in the front part of a solenoid housing chamber 51b formed in a substantially rectangular box shape. The plunger 36a of the solenoid 36 extends in a direction inclined downward toward the front with respect to the output axis J. The solenoid housing chamber 51b has a first wall 51c on the front side facing the driving nose portion 2 and a second wall 51d on the lower side facing the magazine 26. The plunger 36a protrudes out of the solenoid housing chamber 51b from the center of the first wall 51c. An air inlet 51e that penetrates the solenoid housing chamber 51b inside and outside is provided in the first wall 51c around the plunger 36a. The air inlet 51e is arranged side by side with the solenoid 36 in the front-rear direction. Exhaust ports 51f that penetrate the inside and outside are provided on the left and right side surfaces of the gear portion housing chamber 51h.

[0072] Referring to FIG. 16, the flow of the cooling air for cooling the solenoid 36 will be described. When the motor 20 is started, the fan 21 rotates integrally with the output shaft 20a. Cooling air that flows from the rear to the front is generated in the motor housing chamber 51a of the mechanism case 51. A negative pressure is generated in the solenoid housing chamber 51b that communicates with the motor housing chamber 51a via the communication passage 51g, and the cooling air flows. First, outside air is taken in as cooling air from the air inlet 51e of the first wall 51c into the solenoid housing chamber 51b. The cooling air passes between the coil 36b of the solenoid 36 and the inner peripheral surface of the holder 36c, and further passes through an air passage A1 that flows into the rear communication passage 51g. The coil 36b is cooled by the cooling air passing through the air passage A1. The cooling air passes through an air passage A2 that flows from the communication passage 51g to the front motor housing chamber 51a. The motor 20 is cooled by the cooling air passing through the air passage A2. The cooling air is discharged to the outside from the exhaust port 51f of the gear portion housing chamber 51h.

[0073] As described above, the main body housing 11 has an air inlet 51e in the first wall 51c that penetrates the plunger 36a of the solenoid 36 as shown in FIGS. 15 and 16. Therefore, the air inlet 51e is provided at a position where the taken-in outside air easily hits the coil 36b of the solenoid 36. Thereby, the cooling efficiency of the solenoid 36 can be enhanced.

[0074] Next, a third embodiment of the present disclosure will be described with reference to FIG. 17. In the main body housing 11 of the driving tool 60 of the third embodiment, a mechanism case (motor housing) 61 is provided instead of the mechanism case 12 shown in FIG. 1. In the following description, only the parts different from the first embodiment will be described in detail. The mechanism case 61 is provided in a substantially cylindrical shape extending in the front-rear direction below the grip 5. The mechanism case 61 has a motor housing chamber 61a, a gear portion housing chamber 61i, a lifter housing chamber 61j, and a solenoid housing chamber 61b. These configurations are provided in the same manner as the motor housing chamber 12a, the gear portion housing chamber 12h, the lifter housing chamber 12i, and the solenoid housing chamber 12b of the mechanism case 12 shown in FIG. 2.

[0075] As shown in FIG. 17, the solenoid 36 is housed in the front portion of the solenoid housing chamber 61b formed in a substantially rectangular box shape. The plunger 36a of the solenoid 36 extends in a direction inclined downward and forward with respect to the output axis J. The solenoid housing chamber 61b has a first wall 61c on the front side facing the driving nose portion 2 and a second wall 61d on the lower side facing the magazine 26. The plunger 36a projects out of the solenoid housing chamber 61b from the center of the first wall 61c. An air inlet 61e penetrating the solenoid housing chamber 61b inside and outside is provided in the second wall 61d. The air inlet 61e is arranged side by side with the solenoid 36 vertically. Exhaust ports 61f penetrating inside and outside are provided on the left and right side surfaces of the gear portion housing chamber 61i.

[0076] As shown in Fig. 17, the rear part of the solenoid housing chamber 61b communicates with the rear part of the motor housing chamber 61a via a communication passage 61g. In the right half region of the lower surface of the motor housing chamber 61a, an exposed portion 61h is provided to expose the outer surface of the stator of the motor 20 with respect to the rear part of the solenoid housing chamber 61b. The cooling air that enters the solenoid housing chamber 61b from the air inlet 61e passes through the vicinity of the coil 36b and then through a first air passage A1 leading to the rear communication passage 61g. At this time, the cooling air cools the outer surface of the stator of the motor 20 through the exposed portion 61h. Further, the cooling air passes through a second air passage A2 leading from the communication passage 61g to the front motor housing chamber 61a. At this time, the cooling air passes through the inside of the motor 20 to cool the inner surface of the stator, the rotor, etc. The cooling air that has passed through the second air passage A2 is discharged outward from the exhaust port 61f of the gear portion housing chamber 61i.

[0077] As described above, the air passage includes a first air passage A1 through which the cooling air that cools the motor 20 from the outside flows as shown in Fig. 17, and a second air passage A2 that communicates with the first air passage A1 and through which the cooling air passes through the inside of the motor 20. Therefore, by cooling the motor 20 from both the outside and the inside, the cooling efficiency of the motor 20 can be improved.

[0078] Next, a fourth embodiment of the present disclosure will be described with reference to Figs. 18 and 19. In the main body housing 11 of the driving tool 70 of the fourth embodiment, a mechanism case (motor housing) 73 is provided instead of the mechanism case 12 shown in Fig. 1. In the mechanism case 73, in addition to the motor 20, a sub-motor 71 for cooling is provided. In the following description, only the parts different from the first embodiment will be described in detail. The mechanism case 73 is provided in a substantially cylindrical shape extending in the front-rear direction below the grip 5. The mechanism case 73 has a motor housing chamber 73a, a gear portion housing chamber 73j, and a lifter housing chamber 73k. These configurations are provided in the same manner as the motor housing chamber 12a, the gear portion housing chamber 12h, and the lifter housing chamber 12i of the mechanism case 12 shown in Fig. 2.

[0079] As shown in FIGS. 18 and 19, the mechanism case 73 has a solenoid accommodation chamber 73b below the motor accommodation chamber 73a and the gear part accommodation chamber 73j. The solenoid 36 is accommodated in the solenoid accommodation chamber 73b. The mechanism case 73 has a sub-motor accommodation chamber 73i below the motor accommodation chamber 73a and the gear part accommodation chamber 73j and behind the solenoid accommodation chamber 73b. The sub-motor 71 is accommodated in the sub-motor accommodation chamber 73i.

[0080] As shown in FIG. 19, the solenoid accommodation chamber 73b and the sub-motor accommodation chamber 73i communicate with each other. The solenoid accommodation chamber 73b and the sub-motor accommodation chamber 73i are vertically partitioned from the motor accommodation chamber 73a and the gear part accommodation chamber 73j by the lower surface of the motor accommodation chamber 73a and the lower surface of the gear part accommodation chamber 73j. The rear part of the solenoid accommodation chamber 73b communicates with the sub-motor accommodation chamber 73i and further communicates with the motor accommodation chamber 73a through a communication passage 73h provided behind the motor accommodation chamber 73a. The lower part of the battery attachment part 7 also communicates with the motor accommodation chamber 73a and the sub-motor accommodation chamber 73i through the communication passage 73h. The motor accommodation chamber 73a communicates with the gear part accommodation chamber 73j in the front-rear direction.

[0081] As shown in FIGS. 18 and 19, the solenoid 36 is accommodated in the front part of the solenoid accommodation chamber 73b formed in a substantially rectangular box shape. The plunger 36a of the solenoid 36 extends in a direction inclined downward toward the front with respect to the output axis J. The solenoid accommodation chamber 73b has a first wall 73c on the front side facing the driving nose part 2 and a second wall 73d on the lower side facing the magazine 26. The plunger 36a projects out of the solenoid accommodation chamber 73b from the center of the first wall 73c. An air intake port 73e penetrating the solenoid accommodation chamber 73b inside and outside is provided in the second wall 73d. The air intake port 73e is arranged vertically aligned with the solenoid 36. First exhaust ports 73f penetrating inside and outside are provided on the left and right side surfaces of the gear part accommodation chamber 73j.

[0082] As shown in FIGS. 18 and 19, the sub-motor housing 73i is provided in a substantially cylindrical shape with the left-right direction as the axial direction. The output shaft of the sub-motor 71 extends in the left-right direction substantially orthogonal to the output axis J. A fan 72 is attached to the right end of the output shaft of the sub-motor 71. A disk-shaped cover 74 is attached to the right end of the sub-motor housing 73i so as to cover the right side of the fan 72. A second exhaust port 73g is provided between the sub-motor housing 73i and the cover 74. The second exhaust port 73g is provided radially outward of the lower region of the fan 72. The exhaust is discharged downward from the second exhaust port 73g.

[0083] Referring to FIG. 19, the flow of the cooling air in the main body housing 11 will be described. When the motor 20 starts, the fan 21 rotates integrally with the output shaft 20a. Cooling air flowing from the rear to the front is generated in the motor housing 73a of the mechanism case 73. A negative pressure is generated inside the battery mounting portion 7 by the rotation of the fan 21, and the cooling air flows. When the sub-motor 71 starts, the fan 72 rotates integrally with the output shaft. Cooling air flowing from the left to the right is generated in the sub-motor housing 73i of the mechanism case 73. A negative pressure is generated inside the solenoid housing 73b and the battery mounting portion 7 by the rotation of the fan 72, and the cooling air flows. The sub-motor 71 is driven independently of the drive of the motor 20. The timing at which the sub-motor 71 starts can be arbitrarily set. For example, power may be supplied to the sub-motor 71 when the trigger 6 is pulled. For example, power may be supplied to the sub-motor 71 when it is detected that the contact arm 3 has moved to the upper position C2 (see FIG. 6). For example, the power supply to the sub-motor 71 may be configured to be cut off after a predetermined time from the start of the supply.

[0084] First, outside air is taken in as cooling air from the intake port 73e of the second wall 73d into the solenoid housing 73b. The cooling air passes between the coil 36b (see FIG. 13) of the solenoid 36 and the inner peripheral surface of the holder 36c to cool the coil 36b. The cooling air passes through the air passage A4 leading from the rear sub-motor housing 73i to the fan 72. The cooling air passing through the air passage A4 is discharged outward from the second exhaust port 73g by the rotation of the fan 72.

[0085] Inside the battery attachment portion 7, first, outside air is taken in as cooling air from the intake port 7a at the upper end. The cooling air passes near the controller 9 and further flows through the air passage A3 that leads to the lower communication passage 73h. The controller 9 is cooled by the cooling air passing through the air passage A3. The cooling air passing through the air passage A3 flows from the communication passage 73h into the sub-motor housing chamber 73i. The cooling air that has flowed into the sub-motor housing chamber 73i is discharged outward from the second exhaust port 73g by the rotation of the fan 72. A part of the cooling air passing through the air passage A3 branches off at the communication passage 73h and flows through the air passage A2 that leads to the motor housing chamber 73a. The motor 20 is cooled by the cooling air passing through the air passage A2. The cooling air is discharged outward from the first exhaust port 73f of the gear portion housing chamber 73j.

[0086] Various modifications can be made to the driving tools 1, 50, 60, and 70 of each of the embodiments described above. A gas spring type driving tool has been illustrated. Instead of this, for example, the present disclosure may be applied to a mechanical spring type driving tool that injects a driver by utilizing a spring force such as a mechanical compression spring generated when moving a driver in the counter-driving direction with a lift mechanism. For example, the present disclosure may be applied to a flywheel type driving tool that injects a driver by utilizing the inertial force of a flywheel. For example, the present disclosure may be applied to an electro-pneumatic type driving tool that utilizes compressed air generated by rotating a crank with an electric motor.

[0087] The ratio (lever ratio) of the distance from the rotation support portion 35a to the claw connection portion 35c and the distance from the rotation support portion 35a to the plunger connection portion 35b in the power transmission member 35 is not limited to the exemplified approximately 2 times and may be appropriately changed. For example, when it is desired to shorten the movement amount of the plunger 36a even by increasing the output of the solenoid 36, or when it is desired to shorten the driving time of the feed mechanism 30, the lever ratio may be increased. For example, when it is desired to decrease the output of the solenoid 36, the lever ratio may be decreased.

[0088] For example, in the mechanism case 51 of the second embodiment, a configuration may be provided that allows the motor 20 to be cooled from the outside, such as the exposed portion 61h of the third embodiment. For example, the mechanism case 51 of the second embodiment may be provided with the sub-motor housing chamber 73i of the fourth embodiment and configured to accommodate the sub-motor 71 equipped with the fan 72. For example, the fan 21 may be removed from the output shaft 20a of the fourth embodiment, and the motor 20, the solenoid 36, the controller 9, etc. may be cooled only by the fan 72 of the sub-motor 71.

[0089] The configuration in which the intake port 12e is provided in the second wall 12d of the solenoid housing chamber 12b has been illustrated. Instead of or in addition to this, an intake port may be provided in the first wall 12c.

Explanation of Reference Numerals

[0090] 1... Driving tool 2... Driving nose portion, 2a, 2b... Driving passages, 2c... Injection port 3... Contact arm, 3a... Adjuster connecting portion 4... Driver guide, 4a... Feed guide portion, 4b... Hole 5... Grip 6... Trigger, 6a... Trigger switch 7... Battery mounting portion, 7a... Intake port 8... Battery 9... Controller 10... Tool body 11... Body housing 12... Mechanism case (motor housing) 12a... Motor housing chamber, 12b... Solenoid housing chamber, 12c... First wall, 12d... Second wall 12e... Intake port, 12f... Exhaust port, 12g... Communication passage, 12h... Gear portion housing chamber 12i... Lifter housing chamber, 12j... Window portion 13... Cylinder 14... Accumulation chamber, 14a... Air chamber 15... Piston 16... Driver, 16a... Rack teeth (engaged portion), 16b... Tip 17... Striker, 17a... Arc-shaped surface 18... Cushion 20…Motor, 20a…Output shaft, 20b…Bearing 21…Fan 22…Planetary reduction mechanism 23…Lift mechanism 24…Wheel 25…Engaging part, 25a…Final engaging part 26…Magazine, 26a…Right part, 26b…Left part, 26c…Support shaft, 26d…Spring receiving part 30…Feeding mechanism 31…Feeding claw, 31a…Feeding inclined surface, 31b…Receiving surface, 31c…Rotating support shaft 31d…Torsion spring 32…Compression spring (biasing member) 33…Check claw, 33a…Check inclined surface, 33b…Rotating support shaft 34…Guide member, 34a…Hole 35…Power transmission member, 35a…Rotating support part, 35b…Plunger connecting part 35c…Claw connecting part, 35d…Spring receiving part, 35e…Thick part 36…Solenoid, 36a…Plunger, 36b…Coil, 36c…Holder 41…Adjuster, 41a…Rotating shaft, 41b…Compression spring 42…Contact plate 43…Spring 44…Switch, 44a…Protruding pin 50…Driving tool 51…Mechanism case (motor housing) 51a…Motor housing chamber, 51b…Solenoid housing chamber, 51c…First wall, 51d…Second wall 51e…Air intake port, 51f…Exhaust port, 51g…Communication passage, 51h…Gear part housing chamber 51i…Lifter housing chamber 60…Driving tool 61…Mechanism case (motor housing) 61a…Motor housing chamber, 61b…Solenoid housing chamber, 61c…First wall, 61d…Second wall 61e…Air intake port, 61f…Exhaust port, 61g…Communication passage, 61h…Exposed part 61i…Gear part housing chamber, 61j…Lifter housing chamber 70…Driving tool 71…Sub-motor 72…Fan 73…Mechanism case (motor housing) 73a…Motor housing chamber, 73b…Solenoid housing chamber, 73c…First wall 73d…Second wall, 73e…Air inlet, 73f…First exhaust port, 73g…Second exhaust port 73h…Communication passage, 73i…Sub-motor housing chamber, 73j…Gear part housing chamber 73k…Lifter housing chamber 74…Cover N…Connecting driver n…Driver, na…Head m…Connecting member (wire) W…Workpiece to be driven C1…Lower position, C2…Upper position J…Output axis A1…Air passage (first air passage), A2…Air passage (second air passage) A3, A4…Air passages

Claims

1. A driving tool, comprising: A driver having a motor as a drive source for generating power to move in a driving direction; A driver guide for movably guiding the driver; A magazine for accommodating driving tools; A feed pawl for feeding the driving tool from the magazine to the driver guide; A power transmission member interlocked with the feed pawl; A driving tool having a solenoid for driving the feed pawl via the power transmission member, the solenoid being provided in a main body housing outside the magazine.

2. The driving tool according to claim 1, wherein: The power transmission member is supported by the main body housing rotatably about a rotation support portion and connected to the feed pawl at a pawl connection portion; A plunger of the solenoid is connected to the power transmission member between the rotation support portion and the pawl connection portion.

3. The driving tool according to claim 1 or 2, wherein: A biasing member for biasing the feed pawl toward the driver guide is provided; The solenoid moves the feed pawl in a direction opposite to the biasing direction of the biasing member in an on state.

4. The driving tool according to any one of claims 1 to 3, wherein: The main body housing includes a motor housing for accommodating the motor; The solenoid is accommodated in the motor housing and disposed between the motor and the magazine.

5. The driving tool according to any one of claims 1 to 4, wherein: The main body housing has a fan for generating wind therein; The solenoid is a driving tool provided in an air passage through which the wind generated by the fan flows.

6. The driving tool according to claim 5, wherein the solenoid is a driving tool provided on the upstream side of the air passage with respect to the motor.

7. The driving tool according to claim 5 or 6, wherein the main body housing includes a motor housing that houses the motor, the motor housing has a motor housing chamber that houses the motor and a solenoid housing chamber that houses the solenoid, and the motor housing chamber and the solenoid housing chamber are communicated by a communication passage.

8. The driving tool according to any one of claims 5 to 7, wherein the main body housing has an air inlet in at least one of a first wall that penetrates the plunger of the solenoid or a second wall that faces the coil of the solenoid.

9. The driving tool according to any one of claims 5 to 8, wherein the air passage includes a first air passage through which cooling air that cools the motor from the outside flows, and a second air passage that is communicated with the first air passage and through which the cooling air passes inside the motor.

10. The driving tool according to any one of claims 1 to 9, wherein a piston to which the driver is connected, and a cylinder in which the piston is movably provided, and the driver is returned in the reverse driving direction by the motor to increase the gas pressure in the cylinder.

Images