Work machine

Abstract

Provided is a work machine with improved convenience. A work machine 10 is provided with: an electric motor 15 for driving a striking part 12 for striking a fastener; a housing 11 having the striking part 12 and the electric motor 15; a movable part 40 movable relative to the housing 11 by abutting on a counterpart material W; and a control part 50 for controlling the drive of the electric motor 15 according to the position of the movable part 40. The movable part 40 includes: a shaft 41 and an adjustment arm 42 movable relative to the housing 11 between the first position and the second position; and a push lever 46 abutting on the counterpart material W. The push lever 46 is capable of being switched between a restricted state, in which separation from the shaft 41 and the adjustment arm 42 is restricted, and a released state, in which separation is not restricted. The striking part 12 is capable of striking the fastener N when the push lever 46 is in the restricted state, and is prohibited from striking the fastener N when the push lever 46 is in the released state.

Description

Work equipment

[0001] The present invention relates to a work machine.

[0002] A driving tool is a known work machine that moves a piston and a driver blade to strike a fastener with the driver blade. The driving tool is provided with a push lever, and when the push lever is not pressed against the workpiece, the driving tool will not drive the fastener even if the trigger is operated.

[0003] JP 2018-108610 A

[0004] However, when replacing the push lever depending on the purpose of the work, the worker needs to work carefully so as not to push the push lever into a pushed-in state, so there is room for improvement in convenience.

[0005] A working machine according to one embodiment includes a striking unit that strikes a fastener, a drive unit that drives the striking unit, a main body unit having the striking unit and the drive unit, a movable unit that is movable relative to the main body unit by abutting against a mating member, and a control unit that controls the drive unit depending on the position of the movable unit. The movable unit includes a base unit that is movable relative to the main body unit between a first position and a second position, and a contact unit that abuts against the mating member. The contact unit is switchable between a restricted state in which removal from the base is restricted, and a released state in which removal from the base is not restricted. The striking unit is capable of striking the fastener when the abutment unit is in the restricted state, and is prohibited from striking the fastener when the abutment unit is in the released state.

[0006] According to the present invention, it is possible to provide a work machine with improved convenience.

[0007] 1 is a cross-sectional view showing the structure of a work machine according to an embodiment. FIG. 1 is a diagram illustrating the configuration of a movable part of a first embodiment. FIG. 2 is a cross-sectional view of the movable part taken along line A-A in FIG. 1. FIG. 3 is an external perspective view of a lock shaft. FIG. 4 is a diagram illustrating the movable part when a pushing operation is performed. FIG. 5 is a cross-sectional view of the movable part when a pushing operation is performed. FIG. 6 is an external perspective view of the shaft guide, lock shaft, and lock lever when the push lever is in a locked state (restricted state). FIG. 7 is an external view of the shaft guide, lock shaft, and lock lever when the push lever is in a locked state (restricted state), as viewed from the front. FIG. 8 is an external perspective view of the shaft guide, lock shaft, and lock lever when the push lever is in a released state. FIG. 9 is an external view of the shaft guide, lock shaft, and lock lever when the push lever is in a released state, as viewed from the front. FIG. 10 is a diagram illustrating the movable part when the push lever is in a released state. FIG. 11 is a cross-sectional view of the movable part when the push lever is in a released state. FIG. 12 is a diagram illustrating the movable part when the push lever is removed. FIG. 13 is a diagram illustrating the configuration of the movable part of a second embodiment. FIG. 14 is a diagram illustrating the configuration of the movable part of a second embodiment. FIG. 15 is a diagram illustrating the configuration of the movable part of a third embodiment. 18. A perspective view of the appearance of a movable part of a third embodiment. A cross-sectional view taken along line B-B in FIG. 18. A cross-sectional view taken along line CC in FIG. 18. A cross-sectional view taken along line DD in FIG. 18. A cross-sectional view of the movable part when a pushing operation is performed. A cross-sectional view of the movable part when a pushing operation is performed. A cross-sectional view of the movable part when the push lever is attached or detached. A cross-sectional view of the movable part when the push lever is attached or detached. A cross-sectional view of the movable part when the push lever is removed. A cross-sectional view of the movable part when the adjustment mechanism is operated.

[0008] <First embodiment> A work machine according to a first embodiment will be described with reference to the drawings.

[0009] 1 is a cross-sectional view of a work machine 10 according to a first embodiment. The work machine 10 is, for example, an electric nailer, and includes a housing 11, a striking unit 12, a nose unit 13, a power supply unit 14, an electric motor 15, a gear case 16, a pressure accumulator 18, a movable unit 40, a control unit 50, and a magazine 54.

[0010] In the following description, the upper part of the page in FIG. 1 may be referred to as the upper side, the lower part as the lower side, the left side as the front side, and the right side as the rear side. The up-down direction is also referred to as the first direction AR1. <Housing 11> The housing 11 is an outer casing element of the work machine 10. The housing 11 has a cylinder case 20 that houses the impact unit 12 (described later), a handle 21, a motor case 22 that houses the electric motor 15 that functions as a drive unit (described later), and an attachment portion 23. That is, the housing 11, the impact unit 12 housed in or fixed to the housing 11, the electric motor 15 that functions as a drive unit, the nose portion 13 (described later), and the shaft guide 201 constitute the main body. The handle 21 and the motor case 22 are connected to the cylinder case 20. The attachment portion 23 is connected to the handle 21 and the motor case 22.

[0011] <Cylinder case 20> A cylinder 28 is supported in the cylinder case 20. The cylinder 28 is made of metal. The cylinder 28 is fixed to a nose portion 13 (described later) and is positioned relative to the cylinder case 20 via the nose portion 13 in the direction of an axis AX1 parallel to a first direction (vertical direction) AR1 and in the radial direction (direction perpendicular to the axis AX1). The axis AX1 is the direction in which a striking portion 12 (described later) extends.

[0012] <Handle 21> The handle 21 extends along the front-to-rear direction of the work machine 10. As shown in Fig. 1, a trigger 51 is provided below the handle 21. An operator can operate the trigger 51 while grasping the handle 21. A trigger switch (not shown) is provided within the handle 21, and outputs an operation signal (ON signal) when an operating force is applied to the trigger 51. When the operating force on the trigger 51 is released, the trigger switch stops outputting the operation signal.

[0013] <Motor case 22> The motor case 22 is a housing that houses the electric motor 15 and the gear case 16, which will be described later. The motor case 22 has a cylindrical shape that extends along the rotational axis AR2 of the electric motor 15. The rotational axis AR2 of the electric motor 15 extends in a first direction (vertical direction) AR1, i.e., a direction that intersects with the axis AX1.

[0014] <Mounting section 23> The mounting section 23 is disposed at the rear end of the handle 21 and the motor case 22. The power supply section 14, which will be described later, is detachably attached to the mounting section 23. A controller 501 of the control section 50, which will be described later, is also provided within the mounting section 23. The controller 501 is electrically connected to a trigger switch via wiring. When the trigger 51 is operated by an operator, the controller 501 of the control section 50 outputs an electrical signal that instructs the electric motor 15, which will be described later, to start or stop driving in accordance with the operation.

[0015] <Striking Section 12> The striking section 12 is formed in a rod shape extending about the axis AX1 and strikes the fastener N. The striking section 12 has a piston 29 and a driver blade 30. The piston 29 is provided on the upper side in the direction of the axis AX1 (i.e., the up-down direction) and has a cylindrical shape with the axis AX1 as its axis. The piston 29 is provided on one side (downward) in the first direction AR1 with respect to the pressure accumulator vessel 18, which will be described in detail later, and is constantly biased toward one side (downward) in the first direction AR1 by the pressure of a pressure chamber 27 provided in the pressure accumulator vessel 18. The piston 29 is movable in the first direction AR1 along the axis AX1 inside the cylinder 28. A seal member is attached to the outer peripheral surface of the piston 29. The seal member contacts the inner peripheral surface of the cylinder 28 to form a sealing surface.

[0016] The driver blade 30 is made of, for example, metal. The driver blade 30 is connected to the piston 29 on the lower side of the piston 29 in the first direction AR1, and extends along the axis AX1. In other words, the driver blade 30 is connected to the piston 29 at its upper end. As described above, the piston 29 is movable in the first direction AR1, and therefore the driver blade 30 is also movable in the first direction AR1.

[0017] A plurality of racks (not shown) are disposed in the center of the driver blade 30. The driver blade 30 moves upward in the first direction AR1 by a driving force from the electric motor 15 (described later) via a transmission mechanism (not shown) that engages with the racks. Note that the movement of the driver blade 30 downward in the first direction AR1 (axis AX1) in FIG. 1 is referred to as "downward." The movement of the driver blade 30 upward in the first direction AR1 (axis AX1) in FIG. 1 is referred to as "upward."

[0018] <Nose portion 13> The nose portion 13 is positioned relative to the cylinder case 20 in the direction of the axis AX1 and in the radial direction of the cylinder 28. The nose portion 13 has a bumper support portion 31, a bumper 35, and a blade guide 37. The bumper support portion 31 is cylindrical and has a guide hole 34. The guide hole 34 is disposed with the axis AX1 as its center.

[0019] A bumper 35 is disposed within the bumper support portion 31. The bumper 35 is integrally formed from a synthetic rubber such as an elastomer. A guide hole 36 having an axis AX1 as its center is provided in the bumper 35. The driver blade 30 described above is movable within the guide hole 36 in a first direction AR1 along the axis AX1.

[0020] A blade guide 37 is also provided on the bumper support portion 31. The blade guide 37 protrudes downward in the first direction AR1 from the bumper support portion 31. A concentric ejection path 38 centered on the axis AX1 is formed inside the blade guide 37. The driver blade 30 is movable in the first direction AR1 along the axis AX1 within this ejection path 38. Fasteners N housed in a magazine 54, which will be described later, are supplied to this ejection path 38.

[0021] A shaft guide 201 that engages with a movable portion 40 (described later) is fixed to the nose portion 13. That is, the shaft guide 201 is a member that constitutes the main body portion.

[0022] <Movable portion 40> Fig. 2 is a diagram illustrating the configuration of the movable portion 40. Fig. 3 is a cross-sectional view of the movable portion 40 taken along line A-A in Fig. 1. As shown in Fig. 1, the movable portion 40 is provided below the nose portion 13. The movable portion 40 has a shaft 41, an adjustment arm 42, an adjuster 43, a lock shaft 44, a lock lever 45, and a push lever 46.

[0023] <Push Lever 46> The push lever 46 is detachably attached below the injection passage 38 of the nose portion 13. The push lever 46 has an arm portion 461 extending along the first direction AR1 and a cylindrical head portion 462 centered on the axis AX1. The arm portion 461 is formed with an attachment protrusion 460 that protrudes forward, i.e., toward the lock shaft 44 (described later). The push lever 46 is fixed to the lock shaft 44 (described later) via this attachment protrusion 460. The head portion 462 is formed below the arm portion 461 and abuts against the target material W during operation of the work machine 10. In other words, the push lever 46 is an abutment portion that abuts against the target material W. The inside of the head portion 462 forms an injection passage through which the stopper N and the driver blade 30 pass. The push lever 46 is attached so as to be movable along the first direction AR1 in response to a pushing operation to press the push lever 46 against the target material W. The movement of the push lever 46 will be described in detail later.

[0024] <Shaft 41> The shaft 41 is a rod-shaped member extending along the first direction AR1. The shaft 41 functions as a base that is provided to be movable in the first direction AR1 in response to movement of the push lever 46 along the first direction AR1 in response to a pushing operation, the details of which will be described later.

[0025] The upper end of the shaft 41 is accommodated in a accommodating portion 351 formed in the bumper 35. The shaft 41 is provided with an attachment arm 401 in which a magnet 402 (described later) is disposed. The portion of the shaft 41 below the attachment arm 401 is inserted through an insertion hole 420 formed in the adjustment arm 42, an insertion hole 430 formed in the adjuster 43, and an insertion hole 202 (see FIG. 1) formed in the shaft guide 201. An elastic member 411 such as a spring is disposed between the upper portion of the attachment arm 401 and the accommodating portion 351. The elastic member 411 biases the shaft 41 downward.

[0026] A step 412 is formed on the outer periphery of the shaft 41 below the mounting arm 401. The diameter of the shaft 41 differs above and below the step 412. As shown in FIG. 2 , the diameter above the step 412 is larger than the diameter below. This step 412 abuts against the upper surface of an adjuster 43 (described later), thereby restricting downward movement of the shaft 41, which is biased downward by an elastic member 411.

[0027] <Adjusting arm 42> The adjusting arm 42 is a cylindrical member formed with an insertion hole 420 that passes through the adjusting arm 42 from the inside to the outside in the up-down direction (first direction AR1). The adjusting arm 42 is positioned below the mounting arm 401 provided on the shaft 41. As described above, the shaft 41 is inserted through the insertion hole 420. A female thread is formed on the inner surface of the insertion hole 420, and by engaging with the male thread formed on the shaft 41, the shaft 41 and the adjusting arm 42 are threadedly coupled together.

[0028] An engagement portion 421 that engages with a lock shaft 44, which will be described later, is formed on the side of the adjust arm 42. Specifically, the engagement portion 421 has protrusions 422, 423 that protrude in a direction (rearward) intersecting the first direction AR1. The protrusions 422 and 423 are formed at different positions in the first direction AR1. A flange 440 formed on the lock shaft 44, which will be described later, is disposed in the space formed between the protrusions 422 and 423. This allows the adjust arm 42 and the lock shaft 44 to engage with each other. With the above configuration, the adjust arm 42 functions as a base that is movable in the first direction AR1 as the push lever 46, which will be described in detail later, moves along the first direction AR1 in response to a pushing operation.

[0029] <Adjuster 43> The adjuster 43 is provided below the shaft guide 201 (see FIG. 1). The adjuster 43 is an operation dial that is rotated by an operator to adjust the operation feel when a push lever 46 (described later) is pressed against a mating material W. The adjuster 43 is a cylindrical member in which an insertion hole 430 is formed that penetrates the adjuster 43 in the up-and-down direction from the inside to the outside. The upper surface of the adjuster 43 abuts against the lower surface of the shaft guide 201. As described above, the shaft 41 is inserted into the insertion hole 430.

[0030] <Lock shaft 44> Figure 4 is an external perspective view of the lock shaft 44. The lock shaft 44 is a support member that detachably supports the push lever 46 in the injection path 38. The lock shaft 44 is a rod-shaped member that extends along the first direction AR1. The lock shaft 44 has a cylindrical main body portion 444 that extends along the first direction AR1, a flange 440, and a support portion 441.

[0031] The flange 440 is formed on the upper end of the main body portion 444, and as described above, engages with the engaging portion 421 of the adjust arm 42. The lock shaft 44 is supported by the adjust arm 42 so as to be movable relative to the adjust arm 42, which is its base. The direction of relative movement of the lock shaft 44 with respect to the adjust arm 42 differs from the first direction AR1, which is the direction in which the lock shaft 44 extends. Specifically, the direction of relative movement of the lock shaft 44 is a rotational direction about a rotation axis AR2 that is parallel to the first direction AR1.

[0032] The support portion 441 is formed near the center of the main body portion 444 extending along the first direction AR1. Specifically, the support portion 441 has a first support protrusion 442, a second support protrusion 443, and a third support protrusion 445. The first support protrusion 442 is a flange formed along the outer periphery of the main body portion 444 and has a larger diameter than the main body portion 444. The second support protrusion 443 is formed on the upper surface of the first support protrusion 442. The second support protrusion 443 has a thickness that corresponds to a portion of the outer periphery of the main body portion 444 and extends upward along the first direction AR1.

[0033] The third support protrusion 445 is formed below and spaced apart from the first support protrusion 442. The third support protrusion 445 is formed to have a larger diameter than the main body 444 in a partial range of the outer periphery of the main body 444. Therefore, in a partial range of the outer periphery of the main body 444, a space S is formed in the first direction AR1 between the lower surface of the first support protrusion 442 and the upper surface of the third support protrusion 445. In addition, in the remaining range of the outer periphery of the main body 444, the space S is not formed in the first direction AR1.

[0034] Rotation of the lock shaft 44 about the rotation axis AR2 switches between a state in which the mounting protrusion 460 of the push lever 46 is disposed in the space S and a state in which the mounting protrusion 460 is not disposed in the space S. When the mounting protrusion 460 is disposed in the space S, the push lever 46 is fixed to the shaft 41, which serves as its base, and the adjust arm 42 via the lock shaft 44 (fixed state). At this time, the push lever 46 is in a restricted state in which removal of the push lever 46 from the shaft 41, which serves as its base, is restricted. When the mounting protrusion 460 is not disposed in the space S, the push lever 46 is released from its fixation to the shaft 41, which serves as its base, and the adjust arm 42 (released state). In the released state, removal of the push lever 46 from the shaft 41 is not restricted.

[0035] That is, the lock shaft 44 functions as a restricting part that can switch between a fixed state (restricted state) in which the push lever 46 is fixed to the shaft 41 and the adjust arm 42, which are the base parts, and a releasable state in which the fixation is released. Alternatively, it can be said that the lock shaft 44 fixes the push lever 46 to the shaft 41 and the adjust arm 42, which are the base parts, in the restricted state.

[0036] The lock shaft 44 has a rod-shaped attachment portion 446 extending along the first direction AR1 below the support portion 441. The attachment portion 446 is inserted into an insertion hole 450 of the lock lever 45, which will be described later. The outer circumferential surface of the attachment portion 446 is formed into a flat shape, part of which extends along the first direction AR1. In other words, the cross section of the attachment portion 446 in a plane perpendicular to the first direction AR1 is non-circular and has corners.

[0037] <Lock Lever 45> As shown in Figures 2 and 3, the lock lever 45 is provided below the lock shaft 44. An insertion hole 450 is formed in the lock lever 45, penetrating the lock lever 45 from inside to outside in the first direction AR1. The insertion hole 450 has a non-circular inner periphery with corners that is formed in accordance with the cross-sectional shape of the mounting portion 446 of the lock shaft 44 (see Figure 7, described later). The mounting portion 446 of the lock shaft 44 described above is inserted into this insertion hole 450. This holds the lock shaft 44 so that it can move relative to the lock lever 45 in the first direction AR1.

[0038] The lock lever 45 is a member operated by an operator when rotating the lock shaft 44 about the rotation axis AR2. That is, the lock lever 45 is rotated by the operator along the rotation direction AR3 or AR4 when setting the push lever 46 to either the locked state (restricted state) or the released state. When the user rotates the lock lever 45, a corner formed on the outer circumferential surface of the mounting portion 446 of the lock shaft 44 comes into contact with a corner formed on the inner wall surface of the insertion hole 450, causing the lock shaft 44 to rotate about the rotation axis AR2.

[0039] 1, the power supply unit 14 is detachably attached to the mounting portion 23 and is a DC power supply that supplies power to the electric motor 15 and other components. The power supply unit 14 has a housing case and a plurality of battery cells housed within the housing case. The battery cells are secondary batteries that can be charged and discharged, and any of lithium-ion batteries, nickel-metal hydride batteries, lithium-ion polymer batteries, and nickel-cadmium batteries can be used.

[0040] <Electric motor 15> The electric motor 15 is a drive unit that receives power from the power supply unit 14 to rotate and drive the striking unit 12. The electric motor 15 is disposed inside a motor case 22. The electric motor 15 is, for example, a brushless motor having a rotor and a stator.

[0041] <Gear case 16> The gear case 16 is provided in front of the electric motor 15 within the motor case 22. The gear case 16 is cylindrical and does not rotate relative to the nose portion 13. A reduction mechanism having an input element, an output element, and multiple sets of planetary gear mechanisms is provided within the gear case 16. The input element of the reduction mechanism is connected to the rotating shaft of the electric motor 15, and the input element is rotatably supported by bearings. The rotational force of the output element of the reduction mechanism within the gear case 16 is converted by a transmission mechanism (not shown) into a moving force in a first direction AR1 along the axis AX1 and transmitted to the driver blade 30.

[0042] <Pressure accumulator container 18> As shown in FIG. 1 , the pressure accumulator container 18 has a cap 24. A head cover 26 is attached to the upper side of the cylinder case 20 in the first direction AR1, and the pressure accumulator container 18 is disposed within the cylinder case 20 and the head cover 26. A pressure chamber 27 is provided within the pressure accumulator container 18. The pressure chamber 27 is filled with gas. Any compressible gas may be used as the gas. In addition to air, an inert gas such as nitrogen gas or a rare gas may be used as the gas. As described above, the pressure of the pressure chamber 27 provided in the pressure accumulator container 18 constantly biases the striking portion 12 toward one side (downward) in the first direction AR1. Note that the following description will be given assuming that the pressure chamber 27 is filled with air.

[0043] 1 , the magazine 54 is disposed on one side (below) of the handle 21 and the motor case 22 (i.e., the electric motor 15) in the first direction (up-down direction) AR1. The magazine 54 accommodates a plurality of connected fasteners N. The multiple fasteners N are connected to one another by connecting elements such as adhesive or wire. The fasteners N accommodated in the magazine 54 are supplied into the injection path 38 by a supply mechanism (not shown). That is, of the fasteners N accommodated in the magazine 54, the fastener N located at the head of the connecting elements is supplied so as to be positioned below the driver blade 30.

[0044] <Control Unit 50> The control unit 50 has a controller 501 and a sensor 502 (see FIG. 2). The controller 501 is provided inside the mounting unit 23. The controller 501 is a microcomputer having an input port, an output port, an arithmetic processing unit, and a storage unit. As described above, the controller 501 is electrically connected to the trigger switch by wiring. When the trigger 501 is operated by the operator, the trigger switch outputs an electrical signal to the controller 501.

[0045] The sensor 502 is, for example, a magnetic sensor, and detects the positions of the shaft 41 and the adjust arm 42, which are the bases, that change when the push lever 46 is pushed. Specifically, the sensor 502 is disposed in the first direction AR1 above the mounting arm 401 of the shaft 41 when the push lever 46 is not pressed against the mating material W. The sensor 502 outputs an ON signal to the controller 501 when the magnitude of the magnetic field (magnetic field) generated by the magnet 402 attached to the mounting arm 401 of the shaft 41 exceeds a preset value.

[0046] The controller 501 outputs an electrical signal instructing the start or end of driving of the electric motor 15 in response to the operator's operation of the trigger 51 and the pushing operation of the push lever 46. The sensor 502 may be a contact switch having a contact piece.

[0047] <Operation of Working Machine 10> An example of the operation of working machine 10 will be described when working machine 10, which is a nail gun, is used to drive a nail, which is a fastener N, into a mating material W. When at least one of the trigger switch and sensor 502 is off, control unit 50 controls so as not to supply power to electric motor 15.

[0048] First, a case where the push lever 46 is separated from the target material W will be described. As shown in Figures 2 and 3, the push lever 46 is fixed to the lock shaft 44, which is engaged with the adjust arm 42. Furthermore, because the step portion 412 of the shaft 41 abuts against the upper surface of the adjuster 43, downward movement of the shaft 41, which is biased downward by the elastic member 411, is restricted. Therefore, the push lever 46 is stopped in the initial position. In other words, the shaft 41 and the adjust arm 42, which constitute the base of the movable part 40, are located in the first position where the sensor 502 is turned off.

[0049] Then, the operator applies an operating force to the trigger 51 and performs a pushing operation to press the push lever 46 against the target workpiece W.

[0050] FIG. 5 is a diagram illustrating the movable part 40 when a pushing operation is performed. FIG. 6 is a cross-sectional view of the movable part 40, similar to FIG. 3 , when a pushing operation is performed. When a pushing operation is performed, the push lever 46 moves upward along the first direction AR1 against the biasing force of the elastic member 411 acting via the adjust arm 42 and the lock shaft 44. In conjunction with this movement of the push lever 46, the lock shaft 44 to which the push lever 46 is fixed, the adjust arm 42 engaged with the lock shaft 44, and the shaft 41 threadedly coupled to the adjust arm 42 move upward against the biasing force of the elastic member 411. In other words, by abutting against the mating member W, the movable part 40 can move upward relative to the main body including the shaft guide 201. When a pushing operation is performed, the push lever 46 moves upward and reaches a position (second position) where the sensor 502 is turned on. In other words, the shaft 41 and the adjustment arm 42 that constitute the base of the movable part 40 are located at the second position where the sensor 502 is turned on.

[0051] When the trigger switch is turned on and the sensor 502 is turned on to detect that the shaft 41 and the adjustment arm 42 are in the second position, the controller 501 of the control unit 50 controls the power supply unit 14 to supply power to the electric motor 15. When the drive shaft is rotated by the electric motor 15 that has received the power supply, the rotational force is transmitted to the driver blade 30 of the striking unit 12 via a transmission mechanism (not shown). In other words, the controller 501 of the control unit 50 controls the driving of the electric motor 15, which is the drive unit, in accordance with the position of the movable unit 40. The driving force transmitted from the electric motor 15 causes the driver blade 30 to rise against the pressure in the pressure chamber 27.

[0052] When the driver blade 30 reaches the top dead center and the rotational force is no longer transmitted, the driver blade 30 descends due to the pressure in the pressure chamber 27 and is guided by the injection path 38 to move to one side (downward) in the first direction AR1 (i.e., the direction of the axis AX1). The driver blade 30 then strikes the fastener N supplied to the injection path 38. That is, the driver blade 30 of the striking portion 12 moves in the axis AX1 direction along the axis AX1 and strikes the fastener N on the lower side in the axis AX1 direction. As a result, the fastener N is struck by the driver blade 30 and driven into the mating material W.

[0053] When the fastener N is driven in and the operator finishes the pushing operation, a downward biasing force is applied to the push lever 46 by the elastic member 411 via the shaft 41, the adjust arm 42, and the lock shaft 44. As a result, the shaft 41, the adjust arm 42, the lock shaft 44, and the push lever 46 move downward and return to their initial positions (first position), as shown in Figures 2 and 3. In other words, the shaft 41 and the adjust arm 42, which constitute the base of the movable part 40, are movable relative to the main body part including the shaft guide 201 in the first direction AR1 between the first position and the second position.

[0054] <Attaching and Removing the Push Lever 46> Next, a description will be given of attaching and removing the push lever 46. First, a description will be given of the case where the push lever 46 is removed from the attached state (fixed state, restricted state).

[0055] Fig. 7 is a perspective view of the shaft guide 201, the lock shaft 44, and the lock lever 45 when the push lever 46 is in the fixed state (restricted state). Fig. 8 is a front view of the shaft guide 201, the lock shaft 44, and the lock lever 45 when the push lever 46 is in the fixed state (restricted state).

[0056] The operator rotates the lock lever 45 along the rotation direction AR3 in Fig. 7. When the lock lever 45 rotates, the lock shaft 44 inserted into the insertion hole 450 of the lock lever 45 also rotates along the rotation direction AR3.

[0057] Fig. 9 is a perspective view of the appearance of the shaft guide 201, the lock shaft 44, and the lock lever 45 after a rotation operation has been performed. Fig. 10 is a front view of the appearance of the shaft guide 201, the lock shaft 44, and the lock lever 45 after a rotation operation has been performed. Figs. 11 to 13 are diagrams illustrating the movable part 40 after a rotation operation has been performed.

[0058] 11 , due to rotation of the lock shaft 44, the third support protrusion 445 formed on the lock shaft 44 and the attachment protrusion 460 of the push lever 46 no longer overlap in the first direction AR1. In other words, the push lever 46 transitions to a released state in which the attachment protrusion 460 is not positioned in the space S formed between the first support protrusion 442 and the third support protrusion 445 of the lock shaft 44.

[0059] When the push lever 46 is in the released state, the lower surface of the mounting protrusion 460 does not come into contact with the upper surface of the third support protrusion 445 of the lock shaft 44. As a result, the downward movement of the push lever 46 is no longer restricted by the support portion 441 of the lock shaft 44. This allows the operator to remove the push lever 46 by pulling it downward in the first direction AR1, as shown in FIG. 13 . In other words, the attachment / detachment direction of the push lever 46 and the movement direction of the movable part 40 are parallel to each other.

[0060] 9, 10, and 12, when the push lever 46 is in the released state, the lock shaft 44 rotates in the rotational operation direction AR3 as described above, and therefore the upper surface 443a of the second support protrusion 443 comes into contact with the lower surface 201a of the shaft guide 201. Because the shaft guide 201 is a main body portion fixed to the housing 11, the upward movement of the lock shaft 44 in the first direction AR1 is restricted.

[0061] As a result, the adjust arm 42 engaged with the lock shaft 44 and the shaft 41 threadedly coupled to the adjust arm 42 do not move upward in the first direction AR1. That is, they do not move to the second position at which the sensor 502 turns on. In other words, when the push lever 46 is in the released state, the movement of the shaft 41 (which serves as the base) and the adjust arm 42 from the first position to the second position is restricted. Therefore, when the push lever 46 is in the released state, the shaft guide 201 abuts against the lock shaft 44, thereby functioning as a stopper that restricts the movement of the shaft 41 (which serves as the base) and the adjust arm 42 from the first position to the second position. As a result, even if an upward force is applied when the push lever 46 is pulled downward, the adjust arm 42 and the shaft 41 are prevented from moving upward, and the sensor 502 is prevented from turning on.

[0062] Because the sensor 502 does not output an ON signal, power is not supplied from the power supply unit 14 to the electric motor 15 under the control of the controller 501 of the control unit 50. In other words, the electric motor 15 is not driven, and the striking unit 12 does not strike the stopper N. In other words, when the push lever 46 is in the released state, striking the stopper N is prohibited.

[0063] Next, the installation of the push lever 46 will be described. When the lock shaft 44 is in the state shown in Figures 9 and 10, the push lever 46 is inserted upward in the first direction AR1. When the push lever 46 is inserted, as shown in Figures 11 and 12, the upper surface of the mounting protrusion 460 of the push lever 46 comes into contact with the lower surface of the first support protrusion 442 of the lock shaft 44. This prevents the push lever 46 from moving excessively upward in the first direction AR1 relative to the lock shaft 44.

[0064] Furthermore, as described above, the upper surface 443a of the second support protrusion 443 contacts the lower surface 201a of the shaft guide 201. Therefore, even if excessive upward force is applied when attaching the push lever 46, the lock shaft 44 is restricted from moving upward. Therefore, when attaching the push lever 46, the lock shaft 44, the adjust arm 42, and the shaft 41 are prevented from moving upward, and the sensor 502 is prevented from turning on.

[0065] After the push lever 46 is inserted, when the operator rotates the lock lever 45 in a rotational operation direction AR4 that is opposite to the rotational operation direction AR3, the lock shaft 44 to which the lock lever 45 is fixed also rotates in the rotational operation direction AR4. As the lock shaft 44 rotates, the third support protrusion 445 formed on the lock shaft 44 and the mounting protrusion 460 of the push lever 46 overlap in the first direction AR1. That is, as shown in FIG. 2 , the push lever 46 transitions to a fixed state (restricted state) in which the mounting protrusion 460 is located in the space S formed between the first support protrusion 442 and the third support protrusion 445 of the lock shaft 44.

[0066] As described above, the lock shaft 44 moves relative to the adjust arm 42, which is the base, along the rotational operation directions AR3 and AR4, which are different from the first direction AR1, thereby switching the push lever 46 between the locked state (restricted state) and the released state.

[0067] When the push lever 46 transitions to the fixed state (restricted state), the lock shaft 44 rotates along the rotational operation direction AR4, causing the upper surface 443a of the second support protrusion 443 to no longer contact the lower surface 201a of the shaft guide 201. As a result, the upward movement of the lock shaft 44 by the shaft guide 201 is no longer restricted. That is, the lock shaft 44 is now able to move upward. Therefore, the adjust arm 42 engaged with the lock shaft 44 and the shaft 41 in contact with the adjust arm 42 are now able to move upward along the first direction AR1. As a result, the adjust arm 42 and the shaft 41 are now able to move to the second position where the sensor 502 is turned on. In other words, when the push lever 46 is in the fixed state (restricted state), the striking portion 12 is able to strike the stopper N.

[0068] According to the first embodiment described above, at least one of the following advantageous effects can be obtained.

[0069] (1) The work machine 10 has a movable part 40 that can move relative to the housing 11 by abutting against the target material W. The movable part 40 includes a shaft 41 and an adjust arm 42 that are base parts that can move relative to the housing 11 between a first position and a second position, and a push lever 46 that abuts against the target material W. The push lever 46 is switchable between a restricted state in which separation from the shaft 41 and the adjust arm 42 is restricted, and a released state in which the restriction is released. The striking part 12 can strike the stopper N when the push lever 46 is in the restricted state, but is prohibited from striking the stopper N when the push lever 46 is in the released state. This prevents the electric motor 15 from driving and the striking part 12 from operating when the push lever 46 is in the released state, eliminating the need for the operator to ensure that the sensor 502 does not turn on when replacing the push lever 46. This improves the convenience of using the work machine 10.

[0070] (2) When the push lever 46 is in the released state, the shaft 41 and the adjustment arm 42 are restricted from moving from the first position to the second position. This prevents the electric motor 15 from being driven and the striking unit 12 from operating when the push lever 46 is in the released state.

[0071] (3) The lock shaft 44 can fix and release the push lever 46 to and from the shaft 41 and the adjust arm 42. This allows the push lever 46 to be switched between a fixed state (restricted state) and a released state with a simple configuration, improving convenience for the operator when using the work machine 10.

[0072] (4) A shaft guide 201 is fixed to the nose portion 13. The shaft guide 201 abuts against the lock shaft 44 when the push lever 46 is in the released state, thereby restricting movement of the shaft 41 and the adjustment arm 42 from the first position to the second position. As a result, when the push lever 46 is in the released state, the sensor 502 does not turn on, which prevents the electric motor 15 from being driven and the impact portion 12 from operating. As a result, the convenience of using the work machine 10 is improved.

[0073] (5) The push lever 46 is switched between a locked state (restricted state) and a released state by the lock shaft 44 moving relative to the shaft 41 and the adjust arm 42. This allows the push lever 46 to be switched between the locked state (restricted state) and the released state with a simple operation, improving the convenience of the worker when using the work machine 10.

[0074] <Second embodiment> A work machine according to a second embodiment will be described. Below, the same components as those of the work machine 10 according to the first embodiment will be assigned the same reference numerals, and differences from the first embodiment will be mainly described. Points that will not be particularly described are the same as those of the first embodiment. The second embodiment differs from the work machine 10 according to the first embodiment in that the work machine is provided with a sensor that detects whether the push lever is in a locked state (restricted state) or a released state. This will be described in detail below.

[0075] Fig. 14 is a diagram illustrating the movable part 40 of the second embodiment when the push lever 46 is in the fixed state (restricted state). Fig. 15 is a diagram illustrating the movable part 40 of the second embodiment when the push lever 46 is pushed when it is in the fixed state (restricted state). Fig. 16 is a diagram illustrating the movable part 40 of the second embodiment when the push lever 46 is in the released state. Fig. 17 is a diagram illustrating the movable part 40 of the second embodiment when the push lever 46 is pushed when it is in the released state.

[0076] 14 , the control unit 50 included in the work machine 10 of the second embodiment has a sensor 503 in addition to the controller 501 and sensor 502 of the first embodiment. The sensor 503 detects the state of the push lever 46, i.e., whether the push lever 46 is in a locked state (restricted state) or a released state. Specifically, the sensor 503 outputs an ON signal to the controller 501 when the magnitude of the magnetic field (magnetism) generated by a magnet 504 provided in the lock shaft 44 exceeds a preset value.

[0077] 15 , when the push lever 46 is pushed to the second position and is in the locked state (restricted state), the magnet 504 is disposed at a position on the lock shaft 44 that faces the sensor 503. In this case, the sensor 503 detects that the push lever 46 is in the locked state (restricted state) and outputs an ON signal to the controller 501.

[0078] 16, when the lock shaft 44 is rotated and the push lever 46 is in the released state, the magnet 504 is not positioned forward where the sensor 503 is located. Therefore, as shown in FIG. 17, when the push lever 46 is in the released state, even if a pushing operation is performed and the shaft 41 and the adjustment arm 42 are in the second position, the magnet 504 and the sensor 503 do not face each other. In other words, the sensor 503 does not detect that the push lever 46 is in the locked state (restricted state), and therefore does not output an ON signal.

[0079] When the trigger switch is turned on and the sensors 502 and 503 are turned on, the controller 501 of the control unit 50 causes the power supply unit 14 to supply power to the electric motor 15. That is, when the sensor 502 detects that the shaft 41 serving as the base and the adjustment arm 42 are located at the second position and the sensor 503 detects that the push lever 46 is in the fixed state (restricted state), the controller 501 of the control unit 50 allows the electric motor 15 to be driven so that the striking unit 12 strikes the stopper N.

[0080] Furthermore, when either the trigger switch or the sensors 502, 503 are off, the controller 501 does not supply power from the power supply unit 14 to the electric motor 15. In other words, when the push lever 46 is in the released state, the controller 501 of the control unit 50 prohibits the electric motor 15 from driving so that the striking unit 12 strikes the stopper N.

[0081] By having the above-described configuration, the second embodiment also has the following advantageous effects in addition to at least one of the advantageous effects (1) to (3) and (5) obtained by the above-described embodiments.

[0082] When the sensor 502 detects that the shaft 41 and the adjust arm 42 are in the second position and the sensor 503 detects that the push lever 46 is in the locked state (restricted state), the controller 501 of the control unit 50 allows the electric motor 15 to be driven so that the striking unit 12 strikes the stopper N. As a result, when the push lever 46 is in the released state, the sensor 503 does not turn on, preventing the electric motor 15 from being driven and the striking unit 12 from operating. This improves the convenience of using the work machine 10. Furthermore, because there is no need for a member to restrict the movement of the shaft 41 and the adjust arm 42 when the push lever 46 is in the released state, this contributes to a reduction in the size and weight of the work machine 10.

[0083] <Third embodiment> A work machine according to a third embodiment will be described. Below, the same components as those of the work machine 10 according to the first embodiment will be assigned the same reference numerals, and differences from the first embodiment will be mainly described. Points that are not particularly described are the same as those in the first embodiment. The third embodiment has a movable part that is different from the movable part 40 according to the first embodiment.

[0084] Figures 18 and 19 are external perspective views of the movable part 60 of the work machine 10 according to the third embodiment. Figure 20 is a cross-sectional view taken along line B-B in Figure 18. Figure 21 is a cross-sectional view taken along line CC in Figure 18. Figure 22 is a cross-sectional view taken along line DD in Figure 18.

[0085] Like the movable part 40 of the first embodiment, the movable part 60 of the third embodiment is also provided below the nose part 13. Because the movable part 60 is different from the movable part 40 of the first embodiment, the blade guide 66 of the nose part 13 is different from the blade guide 37 of the first embodiment. In addition, in the third embodiment, a restriction mechanism 63 is provided for switching the state of the movable part 60.

[0086] <Blade guide 66> The blade guide 66 is fixed below the nose portion 13 and protrudes downward in the first direction AR1. As described in the first embodiment, the housing 11, striking portion 12, electric motor 15, and nose portion 13 constitute a main body. Therefore, the blade guide 66 fixed to the nose portion 13 is also a main body.

[0087] An injection path 38 centered on the axis line AX1 is formed inside the blade guide 66. The blade guide 66 has a first guide member 661 and a second guide member 662. The first guide member 661 is a cylindrical member centered on the axis line AX1. A guide groove 663 extending along the first direction AR1 is formed on the front side of the first guide member 661.

[0088] The second guide member 662 is attached to the front side of the first guide member 661. Guide grooves 664, 665 are formed in the wall surface of the second guide member 662 on the side facing the first guide member 661 (i.e., the rear side). As shown in FIGS. 18 and 19 , the guide groove 664 is formed in a position facing the guide groove 663 formed in the first guide member 661 and extends along the first direction AR1. The guide groove 665 extends along a second direction AR5 that intersects with the first direction AR1 and the front-to-rear direction. In the following description, the second direction AR5 may be referred to as the left-to-right direction.

[0089] A protruding portion 666 that protrudes forward is formed on the second guide member 662. A through-hole 667 that passes through the protruding portion 666 in the up-down direction is formed on the protruding portion 666.

[0090] <Moving Part 60 > The moving part 60 includes an adjustment mechanism 61 and a push lever 65 .

[0091] <Push Lever 65> The push lever 65 is detachably attached to the injection path 38 inside the blade guide 66. The push lever 65 is removed by pulling the push lever 65 downward, as will be described in detail later.

[0092] 20 , the push lever 65 has an arm portion 651 extending along the first direction AR1 and a cylindrical head portion 652 centered on the axis line AX1. A protrusion 653 is formed on the front side of the arm portion 651, protruding toward the second guide member 662 of the blade guide 66 (i.e., the front side). When the push lever 65 is housed in the blade guide 66, the protrusion 653 protrudes toward the second guide member 662 via the guide groove 663.

[0093] 22 , the protrusion 653 is formed by a first protrusion 654, a second protrusion 655, and a third protrusion 656. The first protrusion 654 extends along the first direction AR1. The second protrusion 655 protrudes from the first protrusion 654 above the first protrusion 654 toward one side in the second direction AR5 (left-right direction).

[0094] The third protrusion 656 protrudes from the first protrusion 654 below the first protrusion 654 toward the other side in the second direction AR5 (left-right direction). The distance (separation distance) in the first direction AR1 between the upper end surface of the third protrusion 656 and the lower end surface of the second protrusion 655 is equal to or approximately equal to the width (length in the first direction AR1) of the guide groove 665 formed in the second guide member 662. In the following description, one side in the second direction AR5 may be referred to as the right side, and the other side in the second direction AR5 may be referred to as the left side.

[0095] The head portion 652 is formed below the arm portion 651 and comes into contact with the target workpiece W when the work implement 10 is in operation. That is, the push lever 65 also functions as the contact portion in the third embodiment. The push lever 65 is attached so as to be movable along the first direction AR1 in response to a pressing operation against the target workpiece W.

[0096] <Adjustment Mechanism 61> The adjustment mechanism 61 is provided below the nose portion 13, forward of the push lever 65 and the blade guide 66. The adjustment mechanism 61 has an adjuster shaft 610, an operating portion 611, a sleeve 612, a first adjuster piece 613, a second adjuster piece 614, an elastic member 615, and a moving portion 616.

[0097] 20 , the adjuster shaft 610 is a rod-shaped member that extends along the first direction AR1 and is centered on an axis AX2 that runs along the first direction AR1. The adjuster shaft 610 has an upper end fixed to the nose portion 13 so as to be rotatable about the axis AX2. The lower end of the adjuster shaft 610 is inserted into a through-hole 667 formed in a protrusion 666 of the second guide member 662.

[0098] The operating unit 611 is a member attached to the upper side of the adjuster shaft 610 and operated by an operator. A through-hole 611A is formed in the operating unit 611 and is centered on the axis line AX2. The operating unit 611 is attached to the adjuster shaft 610 by inserting the adjuster shaft 610 into the through-hole 611A. When the operator rotates the operating unit 611 about the axis line AX2, the adjuster shaft 610 rotates together with the operating unit 611 about the axis line AX2. The operation of the adjustment mechanism 61 in response to the operator's operation of the operating unit 611 will be described in detail below.

[0099] The sleeve 612 is provided below the operating portion 611 and is cylindrical with its center on the axis line AX2. The sleeve 612 extends along the first direction AR1. The adjuster shaft 610 is inserted into the sleeve 612. A flange is formed at the upper end of the sleeve 612. The sleeve 612 abuts against the operating portion 611 at this flange.

[0100] The moving part 616 is attached to the front surface of the second guide member 662 so as to be movable along the first direction AR1. The moving part 616 protrudes forward and has a moving surface 616A formed thereon that intersects with the first direction AR1. A through hole 616B is formed in the moving surface 616A and is centered on the axis AX2. The adjuster shaft 610 is inserted into this through hole 616B. The moving surface 616A is located below the lower end of the sleeve 612.

[0101] The first adjuster piece 613 is cylindrical and centered on the axis line AX2. The adjuster shaft 610 is inserted into the first adjuster piece 613. The upper end of the first adjuster piece 613 abuts against the lower surface of the moving surface 616A of the moving part 616. When the operating part 611 is operated by an operator, the first adjuster piece 613 rotates around the axis line AX2 together with the adjuster shaft 610. As shown in FIG. 19 , an inclined step portion 613B inclined with respect to the first direction AR1 is formed on the outer peripheral wall surface 613A of the first adjuster piece 613.

[0102] The second adjuster piece 614 is cylindrical and centered on the axis line AX2. The second adjuster piece 614 is provided outside the outer peripheral wall surface 613A of the first adjuster piece 613, overlapping a portion of the outer peripheral wall surface 613A. An inclined step portion 614A inclined with respect to the first direction AR1 is formed on the outer peripheral wall surface of the second adjuster piece 614. The inclined step portions 613B and 614A abut against each other. Therefore, when the first adjuster piece 613 rotates in response to operation of the operating portion 611, the inclined step portion 614A slides against the inclined step portion 613B, causing the second adjuster piece 614 to move up and down along the first direction AR1.

[0103] A wall surface protrusion 614B that protrudes toward the push lever 65 is formed on the rear side of the outer peripheral wall surface of the second adjuster piece 614. When the push lever 65 is pushed and moves upward in the first direction AR1, the lower end surface of the wall surface protrusion 614B comes into contact with the upper end surface of the protrusion 653 of the push lever 65.

[0104] The elastic member 615 is, for example, a coil spring, and the adjuster shaft 610 is inserted inside the elastic member 615. The elastic member 615 is disposed between the sleeve 612 and the moving surface 616A. Specifically, the upper end of the elastic member 615 abuts against the lower end surface of a flange formed at the upper end of the sleeve 612, and the lower end of the elastic member 615 abuts against the upper end surface of the moving surface 616A. This urges the moving surface 616A downward along the first direction AR1. The first adjuster piece 613 abuts against the moving surface 616A, and the second adjuster piece 614 abuts against the first adjuster piece 613 at the inclined step portions 613B and 614A. Therefore, the first adjuster piece 613 and the second adjuster piece 614 are also urged downward along the first direction AR1.

[0105] <Restriction mechanism 63> The restriction mechanism 63 is provided on the blade guide 66. The restriction mechanism 63 has an eject slider 631, an eject lever 632, and a biasing member 633. The eject slider 631 is housed in the above-mentioned guide groove 665 so as to be movable in the second direction AR5 (left-right direction).

[0106] 21 , a recess 631A extending along the first direction AR1 is formed on the rear surface (first guide member 661 side) of the eject slider 631. As a result, a first slider protrusion 631B and a second slider protrusion 631C protruding rearward are formed on the rear surface of the eject slider 631. The first slider protrusion 631B is formed on the right side of the recess 631A in the second direction AR5. The second slider protrusion 631C is formed on the left side of the recess 631A in the second direction AR5.

[0107] 22, in the first direction AR1, the width (length) of the eject slider 631 is equal to or approximately equal to the width (length) of the guide groove 665. Therefore, the eject slider 631 abuts against the upper or lower side wall surface of the guide groove 665 (i.e., the second guide member 662, which is the main body), thereby restricting movement of the eject slider 631 along the first direction AR1.

[0108] The eject lever 632 is provided on the second guide member 662. The eject lever 632 is attached so as to be rotatable about a rotation axis AX3 that extends in the front-to-rear direction. The eject lever 632 is formed with an operating protrusion 632A and a contact protrusion 632B.

[0109] The operating protrusion 632A is operated by an operator when attaching or detaching the push lever 65. The abutting protrusion 632B is formed at a predetermined angle with the operating protrusion 632A around the rotation axis AX3. The right side wall surface of the abutting protrusion 632B abuts against the left side wall surface of the second slider protrusion 631C of the eject slider 631.

[0110] The biasing member 633 is, for example, a torsion spring, and is wound around a shaft 633A provided on the second guide member 662. One end of the biasing member 633 abuts against the right side wall surface of the first slider protrusion 631B of the eject slider 631. As a result, the biasing member 633 biases the eject slider 631 to the left in the second direction AR5.

[0111] <Operation of the work implement 10> First, a case where the push lever 65 is separated from the target workpiece W will be described. As shown in Figures 21 and 22, the eject slider 631 is urged leftward by the urging member 633. At this time, as shown in Figure 22, a portion of the first slider protrusion 631B of the eject slider 631 is positioned within the guide grooves 663, 664 formed in the first guide member 661 and the second guide member 662. In addition, the second slider protrusion 631C of the eject slider 631 is separated from the guide grooves 663, 664.

[0112] Therefore, the first slider protrusion 631B is located below the second protrusion 655 that constitutes the protrusion 653 of the push lever 65, and abuts against the right side wall surface of the first protrusion 654. In other words, the push lever 65 can move upward relative to the eject slider 631, the blade guide 66, and the adjustment mechanism 61 provided on the blade guide 66.

[0113] The upper end surface of the first slider protrusion 631B abuts against the lower end surface of the second protrusion 655. Therefore, the push lever 65 is restricted from moving downward relative to the eject slider 631, the blade guide 66, and the adjustment mechanism 61, and is stopped at the initial position. In other words, the push lever 65, which is the abutting part, is in a restricted state in which it is restricted from separating from the blade guide 66 and the adjustment mechanism 61.

[0114] Furthermore, when the push lever 65 is separated from the target workpiece W, no upward force is applied to the adjustment mechanism 61. As described above, the first adjuster piece 613 and the moving portion 616 are biased downward by the elastic member 615. For this reason, as shown in Fig. 20, the lower end of the first adjuster piece 613 abuts against the upper end surface of the protrusion 666 formed on the second guide member 662 of the blade guide 66. At this time, it can be said that the first adjuster piece 613, the second adjuster piece 614, and the moving portion 616 are located at a first position along the first direction AR1.

[0115] The operator applies an operating force to the trigger 51 and performs a pushing operation to press the push lever 65 against the target material W. In response to this pushing operation, the push lever 65 moves upward relative to the blade guide 66.

[0116] 23 and 24 are cross-sectional views of the movable part 60 when a pushing operation is performed. Note that Fig. 23 is a cross-sectional view taken in the same direction as Fig. 20, and Fig. 24 is a cross-sectional view taken in the same direction as Fig. 22. As described above, the push lever 65 can move upward relative to the blade guide 66. As a result, when a pushing operation is performed, the push lever 65 moves upward in the first direction AR1.

[0117] As the push lever 65 moves upward, the upper end surface of the protruding portion 653 of the push lever 65 comes into contact with the lower end surface of the wall protruding portion 614B of the second adjuster piece 614. Then, in conjunction with the upward movement of the push lever 65, the second adjuster piece 614, the first adjuster piece 613, and the moving portion 616 move upward in the first direction AR1 against the biasing force of the elastic member 615.

[0118] When the upper end surface of the moving part 616, which is moving upward, abuts against the lower end surface of the sleeve 612, the upward movement of the moving part 616 is restricted and the moving part 616 stops. That is, the upward movement of the second adjuster piece 614, the first adjuster piece 613, and the push lever 65 also stops. The positions at which the push lever 65, the first adjuster piece 613, and the second adjuster piece 614 stop are the second positions.

[0119] Thereafter, the work machine 10 performs the same operation as described in the first embodiment, and drives the fastener N into the mating material W. That is, in the third embodiment as well, the striking unit 12 can strike the fastener N when the push lever 65 is in the restricted state. After the fastener N is driven in and the pushing operation by the worker is finished, the push lever 65 is located in the initial position, and the first adjuster piece 613, the second adjuster piece 614, and the moving unit 616 are located in the first position. In other words, the adjustment mechanism 61 including the first adjuster piece 613, the second adjuster piece 614, and the moving unit 616 is a base that can move relatively between the first position and the second position with respect to the blade guide 66, which is the main body.

[0120] <Attaching and Removing the Push Lever 65> Next, a description will be given of attaching and removing the push lever 65. First, a description will be given of the case where the attached push lever 65 is removed.

[0121] When removing the push lever 65, the operator first operates the eject lever 632. Specifically, the operator hooks a finger or the like on the operating protrusion 632A and rotates the eject lever 632 clockwise in FIG. 22 around the rotation axis AX3. By operating the eject lever 632, a force to the right in the second direction AR5 acts on the eject slider 631 via the second slider protrusion 631C, which abuts against the abutment protrusion 632B. Then, the eject slider 631 moves to the right in the second direction AR5 along the guide groove 665 of the second guide member 662 against the biasing force of the biasing member 633.

[0122] 25, 26, and 27 are cross-sectional views of the movable part 60 and the restriction mechanism 63 when the eject slider 631 has moved to the right along the second direction AR5. Note that FIGS. 25 and 26 show cross-sections of the movable part 60 and the restriction mechanism 63 in the same positions as those in FIGS. 21 and 22, respectively. FIG. 27 is a cross-sectional view of the movable part 60 and the restriction mechanism 63 when the push lever 65 is pulled downward in the state shown in FIG. 26.

[0123] When the eject slider 631 moves to the right in the second direction AR5, as shown in Fig. 26, a portion of the second slider protrusion 631C is positioned within the guide grooves 663, 664. Therefore, the second slider protrusion 631C is positioned above the third protrusion 656 that constitutes the protrusion 653 of the push lever 65, and abuts against the second guide member 662 (see Fig. 25). In other words, the push lever 65 is restricted from moving upward relative to the blade guide 66 and the adjustment mechanism 61.

[0124] Additionally, the first slider protrusion 631B of the eject slider 631 is spaced apart from the guide grooves 663 and 664. This allows the push lever 65 to move downward relative to the blade guide 66. In other words, the push lever 65, which is the contact part, is in a released state in which it is not restricted from separating from the blade guide 66 and the adjustment mechanism 61, which is the base.

[0125] That is, the push lever 65 is configured to be switchable between the restricted state and the released state described above. The restriction mechanism 63 (more specifically, the eject slider 631) switches the push lever 65 between the restricted state and the released state. That is, the eject slider 631 functions as a restriction part that allows the push lever 65, which is the contact part, to be prevented from being separated from the adjustment mechanism 61, which is the base of the push lever 65, and the release of the restriction on the separation. The switching between the restricted state and the released state is performed by the eject slider 631 moving in a second direction AR5 that intersects with the first direction AR1, which is the direction of relative movement of the adjustment mechanism 61.

[0126] 27 , the operator can then remove the push lever 65 by pulling the push lever 65, which is now in the released state as described above, downward along the first direction AR1. That is, in the third embodiment as well, the attachment / detachment direction of the push lever 65 and the movement direction of the movable part 60 are parallel or approximately parallel.

[0127] When the push lever 65 is in the released state, the upward movement of the push lever 65 is restricted. Therefore, the second adjuster piece 614 does not receive an upward force from the push lever 65 via the wall surface protrusion 614B. In other words, the first adjuster piece 613, the second adjuster piece, and the moving part 616 are positioned at the first position by the biasing force of the elastic member 615. In other words, when the push lever 65 is in the released state, the adjustment mechanism 61, which is the base, is restricted from moving from the first position to the second position.

[0128] Because the first adjuster piece 613, the second adjuster piece, and the moving part 616 do not move to the second position, when the push lever 65 is in the released state, power is not supplied from the power supply part 14 to the electric motor 15 under the control of the controller 501 of the control part 50. That is, as in the first embodiment, the striking part 12 does not strike the stopper N. In other words, when the push lever 65 is in the released state, striking the stopper N is prohibited.

[0129] As described above, the width (length) of the eject slider 631 in the first direction AR1 is equal to or approximately equal to the width (length) of the guide groove 665. That is, the eject slider 631 is restricted from moving in the first direction AR1 by abutting against the second guide member 662, which is the main body. Therefore, even if an upward force acts on the eject slider 631 in the released state, the upward movement (in the direction of relative movement) of the push lever 65 and the adjustment mechanism 61, which is the base. For example, even if an impact is applied to the eject slider 631 when the stopper N is stuck in the ejection path 38, the second guide member 662 can absorb the impact. As a result, the upward movement of the adjustment mechanism 61 is restricted, and the unintended supply of power to the electric motor 15 by the control unit 50 is suppressed.

[0130] Next, a description will be given of the case where the push lever 65 is attached. In this case, the eject lever 632 is operated by the operator in the same manner as when removing the push lever 65. That is, the first slider protrusion 631B of the eject slider 631 is separated from the guide grooves 663 and 664, and a portion of the second slider protrusion 631C is positioned within the guide grooves 663 and 664.

[0131] In this state, the push lever 65 is inserted upward in the first direction AR1. Then, the upper end surface of the third protrusion 656 of the push lever 65 comes into contact with the lower end surface of the second slider protrusion 631C. That is, the state shown in FIG. 26 is reached. This restricts the push lever 65 from moving further upward. In other words, the push lever 65 is restricted from moving excessively upward in the first direction AR1 relative to the blade guide 66. Therefore, even if excessive upward force is applied to the push lever 65 during insertion, the adjustment mechanism 61 does not move upward, and therefore, the control unit 50 is prevented from unintentionally supplying power to the electric motor 15.

[0132] After the push lever 65 is inserted, when the operator finishes operating the eject lever 632 and releases his / her finger or the like from the eject lever 632, the eject slider 631 moves to the left in the second direction AR5 due to the biasing force of the biasing member 633. Then, as shown in Figure 22, the first slider protrusion 631B abuts against the second guide member 662 below the second protrusion 655 of the push lever 65 (see Figure 21). This restricts the eject slider 631 from moving further to the left.

[0133] 22, the second slider protrusion 631C of the eject slider 631 moves away from the guide grooves 663 and 664. As a result, the upward movement of the push lever 65 is not restricted, but the downward movement thereof is restricted. In other words, the push lever 65 is restricted from separating from the blade guide 66 and the adjustment mechanism 61.

[0134] <Operation of Adjustment Mechanism 61> As described above, when the operator operates the operation portion 611 of the adjustment mechanism 61, the adjuster shaft 610 and the first adjuster piece 613 rotate around the axis line AX2. As the first adjuster piece 613 rotates, the inclined step portion 614A and the inclined step portion 613B slide against each other, causing the second adjuster piece 614 to move upward or downward along the first direction AR1.

[0135] Fig. 28 is a cross-sectional view of the movable part 60 after the operating part 611 of the adjustment mechanism 61 has been operated from the state shown in Fig. 20. Fig. 28 shows a state in which the second adjuster piece 614 has moved downward along the first direction AR1.

[0136] 28 , the distance in the first direction AR1 between the upper end surface of the first adjuster piece 613 and the lower end surface of the second adjuster piece 614 is longer than that in the state shown in FIG. 20 . That is, the relative positions of the push lever 65, the second adjuster piece 614, and the blade guide 66 when the push lever 65, the first adjuster peel 613, and the second adjuster piece 614 are located at the second position are different between the state shown in FIG. 20 and the state shown in FIG. 28 . In other words, in the state shown in FIG. 28 , the distance between the lower end of the push lever 65 (the target material W abutting the push lever 65) and the lower end of the blade guide 66 when the push lever 65 is located at the second position is longer than that in the state shown in FIG. 20 . That is, by changing the distance between the target material W and the blade guide 66 depending on the material of the target material W, etc., it is possible to adjust the driving depth of the fastener N driven into the target material W.

[0137] According to the third embodiment described above, in addition to at least one of the effects (1) and (2) obtained by the first embodiment, at least one of the following effects can be obtained.

[0138] (6) The eject slider 631 of the restriction mechanism 63 can restrict and release the removal of the push lever 65 from the adjustment mechanism 61. Specifically, the eject slider 631 of the restriction mechanism 63 switches the push lever 65 between a restricted state and a released state by moving in a second direction AR5 that intersects with the relative movement direction (first direction AR1) of the adjustment mechanism 61. This simplifies the structure of the restriction mechanism 63, resulting in a smaller size and improved durability of the restriction mechanism 63, and improving convenience. Furthermore, because the push lever 65 can be switched between a restricted state and a released state with a simple configuration, convenience is improved when the operator uses the work machine 10.

[0139] (7) In the released state, the eject slider 631 abuts against the second guide member 662, which is the main body, thereby restricting the movement of the adjustment mechanism 61 in the relative movement direction. This prevents the adjustment mechanism 61 from moving upward due to the application of an unintended force in the released state, thereby preventing the control unit 50 from supplying power to the electric motor 15.

[0140] Although various embodiments and modifications have been described above, the present invention is not limited to these. Other embodiments that are conceivable within the scope of the technical idea of ​​the present invention are also included within the scope of the present invention.

[0141] 10...working machine, 11...housing, 12...impacting portion, 13...nose portion, 14...power supply portion, 15...electric motor, 16...gear case, 20...cylinder case, 21...handle, 22...motor case, 23...mounting portion, 29...piston, 30...driver blade, 40, 60...moving portion, 41...shaft, 42...adjusting arm, 43...adjuster, 44...lock shaft, 45...lock lever, 46, 65...push lever, 50...control portion, 51... trigger, 54... magazine, 60... movable part, 61... adjustment mechanism, 63... restriction mechanism, 66... ​​blade guide, 201... shaft guide, 201a... surface, 401... mounting arm, 402, 504... magnet, 411... elastic member, 412... step portion, 420... insertion hole, 421... engagement portion, 422, 423... protrusion, 430... insertion hole, 440... flange, 441... support portion, 442... first support protrusion, 443... second support protrusion, 444... main body, 445 ...Third support protrusion, 446...Mounting portion, 450...Through-hole, 460...Mounting protrusion, 461...Arm portion, 462...Head portion, 501...Controller, 502, 503...Sensor, 610...Adjuster shaft, 611...Operation portion, 612...Sleeve, 613...First adjuster piece, 613B, 614A...Inclined step portion, 614...Second adjuster piece, 614B...Wall surface protrusion, 615...Elastic member, 616...Moving portion, 631...Eject slider , 631B...first slider protrusion, 631C...second slider protrusion, 632...eject lever, 632A...operation protrusion, 632B...contact protrusion, 633...urging member, 653...protrusion, 654...first protrusion, 655...second protrusion, 656...third protrusion, 661...first guide member, 662...second guide member, 663, 664, 665...guide groove, AR1...first direction, AR2...rotation axis, AR5...second direction, N...stop, S...space, W...mating member

Claims

1. The striking part that strikes the fastener, A drive unit that drives the striking unit, A main body having the striking part and the drive part, A movable part that can move relative to the main body by contacting the mating material, The system includes a control unit that controls the drive of the drive unit according to the position of the movable part, The aforementioned movable part is A base portion that is movable relative to the main body portion between a first position and a second position, It includes a contact portion that contacts the mating material, The control unit includes a first sensor capable of detecting that the base is located in the second position. The contact portion is switchable between a restricted state in which its separation from the base is restricted and a released state in which its separation from the base is not restricted. The striking portion is capable of striking the fastener when the contact portion is in the restricted state, and is prohibited from striking the fastener when the contact portion is in the released state.

2. In the work machine described in claim 1, The base is a work machine in which the movement of the contact portion from the first position to the second position is restricted when the contact portion is in the released state.

3. In the work machine described in claim 2, The system includes a restricting unit that can switch the state of the contact portion relative to the base portion, A work machine in which, when in the restricted state, the restricting part restricts the separation of the contact part from the base, and when in the released state, the restricting part releases the restriction on the separation of the contact part from the base.

4. In the work machine described in claim 3, The main body portion has a stopper portion that, when the contact portion is in the released state, contacts the restricting portion, thereby restricting the base portion from moving from the first position to the second position.

5. In the work machine described in claim 4, A work machine in which the direction in which the contact portion is attached to and detached from the base is parallel to the relative direction of movement of the base.

6. In the work machine described in claim 5, A work machine wherein the restricting portion moves relative to the base, causing the contact portion to switch between the restricted state and the released state, and the relative movement direction of the restricting portion is different from the relative movement direction of the base.

7. In the work machine described in claim 1, The control unit, A work machine having a second sensor for detecting the position of the base and the state of the contact portion, and allowing the drive unit to be driven so that the striking portion strikes the fastener when the second sensor detects that the base is in the second position and the contact portion is in the restricted state.

8. In the work machine described in claim 3, The restricting part moves in a direction intersecting the relative movement direction of the base, thereby switching between the restricted state and the released state of the contact part.

9. In the work machine described in claim 8, In the released state, the restricting portion contacts the main body portion, thereby restricting the movement of the base portion in the relative movement direction, in a work machine.

10. In the work machine according to Claim 1, The base moves from the first position to the second position when the contact portion comes into contact with the mating material. The control unit, When the base is not in the second position, the drive unit is restricted from operating so that the striking part strikes the fastener. A work machine that allows the drive unit to operate such that the striking unit strikes the fastener when the base is in the second position.

11. A striking part for striking the fastener, A drive unit that drives the striking unit, A main body having the striking part and the drive part, A movable part that can move relative to the main body by contacting the mating material, The system includes a control unit that controls the drive of the drive unit according to the position of the movable part, The aforementioned movable part is A base portion that is movable relative to the main body portion between a first position and a second position, It includes a contact portion that contacts the mating material, The contact portion is switchable between a restricted state in which its separation from the base is restricted and a released state in which its separation from the base is not restricted. The control unit has a sensor that detects when the contact portion is in a restricted state, and is a work machine.

12. A striking part for striking the fastener, The main body having the striking portion, It comprises a contact portion that can move relative to the main body portion by contacting the mating material, The striking portion is permitted to strike the fastener when the contact portion is in a predetermined position. The contact portion is restricted to being located at the predetermined position when it is in a released state in which it is not restricted from detaching from the main body, in a work machine.