Work machine

Abstract

The present invention improves the convenience of a work machine. This work machine comprises: an injection part 13; a striking part for striking a stopper; and a push lever 79 for switching to enable / disable striking of the striking part. The injection part 13 has a blade guide 34 and a guide plate 39 combined in a front-rear direction N1. The push lever 79 is held between the blade guide 34 and the guide plate 39 so as to be adjacent to the front side of the blade guide 34 in a state where the blade guide 34 and the guide plate 39 are combined. The push lever 79 has two ribs 79i capable of abutting on the stopper in a left-right direction R1.

Description

Work equipment

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

[0002] As an example of a work machine, a driving tool is known that includes an ejection section, an impact section that strikes a fastener placed in the ejection section, and an abutment section that abuts against an opposing material and can move back and forth in the axial direction of the impact section.

[0003] For example, Patent Document 1 discloses a driving tool in which the contact part is supported by an ejection part so as to be freely movable in the axial direction of the striking part.

[0004] International Publication No. 2024 / 080232

[0005] In the work machine (driving machine) described in the above-mentioned Patent Document 1, even when the abutting portion is in contact with the mating material, the ejection portion that guides the fastener is separated from the mating material during driving. As a result, the fastener is no longer guided by the ejection portion as it moves toward the mating material during driving. As a result, the fastener may move at an angle rather than in a straight line, potentially causing the driving position to shift. If the fastener's driving position shifts, the finished condition of the mating material may deteriorate, which could reduce the usability of the work machine.

[0006] An object of the present invention is to provide a work machine with improved convenience.

[0007] a contact portion that moves relative to the ejection portion from an initial position in the first direction by contacting an opposing material, thereby switching whether or not the impact portion can strike; and a magazine portion that supplies the fastener to the ejection portion, wherein the ejection portion has a base and a cover portion that are combined in a second direction perpendicular to the first direction, and the ejection portion defines an ejection path that is a passage through which the fastener is ejected and an ejection outlet that is an outlet of the ejection path by the base and the cover portion when the base and the cover portion are combined, and the abutment portion is held adjacent to one side of the base in the second direction by being sandwiched between the base and the cover portion in the second direction when the base and the cover portion are combined, and the abutment portion has a first guide portion that can abut against the fastener in a third direction perpendicular to the first direction and the second direction.

[0008] According to the present invention, the convenience of the work machine can be improved.

[0009] 11 is a perspective view showing the structure of a working machine according to an embodiment of the present invention. FIG. 1 is a front view showing the internal structure of the working machine shown in FIG. 1. FIG. 2 is a cross-sectional view showing the structure cut along line A-A in FIG. 2. FIG. 12 is a cross-sectional view showing the internal structure of the working machine shown in FIG. 1. FIG. 13 is a perspective view showing the structure of an ejection unit assembled to the working machine shown in FIG. 1. FIG. 5 is a perspective view showing the structure of the ejection unit shown in FIG. 5 in a state where the guide plate is in an open state and the push lever is not pressed. FIG. 5 is a perspective view showing the structure of the ejection unit shown in FIG. 5 in a state where the guide plate is in an open state and the push lever is pressed. FIG. 14 is an exploded perspective view of the blade guide and push lever of the ejection unit shown in FIG. 5. FIG. 15 is a front view, partially cut away, showing the structure of the ejection unit shown in FIG. 5 in a state where the adjuster is fully raised and the push lever is in the initial position. FIG. 16 is a front view, partially cut away, showing the structure of the ejection unit shown in FIG. 5 in a state where the adjuster is fully lowered and the push lever is in the initial position. FIG. 17 is a front view, partially cut away, showing the structure of the ejection unit shown in FIG. 5 in a state where the adjuster is fully lowered and the push lever is in the pressed-in position. FIG. 18 is a cross-sectional view showing the structure cut along line A-A in FIG. 16 is a cross-sectional view showing the structure cut along line B-B in FIG. 11. FIG. 17 is a front view showing the external structure of the working machine according to an embodiment of the present invention, with the push lever in the depressed position and the adjuster in the fully depressed state. FIG. 18 is a front view showing the external structure of the working machine according to an embodiment of the present invention, with the push lever in the depressed position and the adjuster in the fully raised state. FIG. 19 is a cross-sectional view showing the structure of the working machine according to an embodiment of the present invention, cut along line B-B in FIG. 14. FIG. 19 is a perspective view showing the state in which a nail is placed in the structure of FIG. 15. FIG. 20 is a perspective view showing the state in which a nail is placed in the structure of FIG. 21. FIG. 22 is a front view showing the external structure of the working machine shown in FIG. 14, with the push lever in the depressed position and the adjuster in the fully raised state. FIG. 23 is a front view showing the nail supply position in the working machine shown in FIG. 14, with the push lever in the depressed position and the adjuster in the fully depressed state.

[0010] The working machine used in this embodiment is an air compression type driving machine 10.

[0011] 1 to 4, a driving tool (working machine) 10 according to the present embodiment will be described. The driving tool 10 includes a housing 11, an impact unit 12, an injection unit 13, a power supply unit 14, an electric motor 15, a reduction gear mechanism 16, a winding mechanism 17, and a pressure accumulator vessel 18. The housing 11 is the outer shell element of the driving tool 10 and includes a cylinder case 19, a handle 20, a motor case 21, and a mounting unit 22. The cylinder case 19 is cylindrical, and the handle 20 and the motor case 21 are connected to the cylinder case 19. The mounting unit 22 is also connected to the handle 20 and the motor case 21. Specifically, one end of the mounting unit 22 is connected to the handle 20, and the other end is connected to the motor case 21 via an extension 21a. The power supply unit 14 is detachably attached to the mounting unit 22.

[0012] In the first embodiment, the direction in which the cylinder case 19 extends is defined as the up-down direction (first direction) M1, and the direction in which the motor case 21 extends, which is perpendicular to the up-down direction (first direction) M1, is defined as the front-rear direction (second direction) N1. Furthermore, the direction perpendicular to the up-down direction (first direction) M1 and the front-rear direction (second direction) N1 is defined as the left-right direction (third direction) R1.

[0013] A cylinder 27 is housed within the cylinder case 19. The cylinder 27 is made of metal, for example, aluminum or iron. The cylinder 27 is positioned relative to the cylinder case 19 in a direction along a center line A1 and in a radial direction. The center line A1 passes through the center of the cylinder 27. The radial direction is the radial direction of an imaginary circle centered on the center line A1.

[0014] The housing 11 has a structure in which it is split into two parts, left and right, and the housing 11 located on the right side and the housing 11 located on the left side are fixed together with a plurality of screws.

[0015] A head cover 25 is attached to the cylinder case 19, and a pressure accumulator vessel 18 having a cap 23 is disposed within the cylinder case 19 and the head cover 25. A cylinder 27 disposed within the cylinder case 19 is supported by a holder 24, which is connected to the cap 23. This forms a pressure chamber 26 extending from the pressure accumulator vessel 18 to the cylinder 27. The pressure chamber 26 is filled with compressed gas. The compressed gas filled in the pressure chamber 26 urges the striking portion 12 downward in the up-down direction M1.

[0016] The striking portion 12 is disposed from the inside to the outside of the housing 11, and has a piston 28 and a driver blade 29. The piston 28 is operable in the vertical direction M1 within the cylinder 27. The piston 28 and the driver blade 29 are provided as separate members, and the piston 28 and the driver blade 29 are connected to each other. Therefore, the striking portion 12 can strike the nail (fastener) 78 by moving downward in the vertical direction M1.

[0017] The injection unit 13 has a portion that supports the supplied nail 78. In other words, the striking unit 12 strikes the nail 78 located in the injection unit 13 downward in the up-down direction M1. The injection unit 13 includes a nose portion 32 that supports the cylinder 27, a blade guide (base portion) 34 that guides the movement of the driver blade 29, and a guide plate (cover portion) 39 that forms an injection path 37 between the nose portion 32 and the blade guide 34. The nail 78 struck by the striking unit 12 is ejected to the outside through an injection port 38 of the injection path 37.

[0018] The driver blade 29 is disposed in the guide hole of the bumper support portion 31 and the guide hole 36 of the bumper 35. The striking portion 12 is movable in the vertical direction M1 and is constantly urged downward by the pressure of the compressed gas in the pressure chamber 26. The ejection portion 13 has an ejection path 37 in which the nail 78 is disposed, and the ejection path 37 is provided along the vertical direction M1. The driver blade 29 is movable in the vertical direction M1 within the ejection path 37 and strikes the nail 78 supplied to the ejection portion 13 downward in the vertical direction (first direction) M1.

[0019] A push lever (contact portion) 79 is attached to the nose portion 32. The push lever 79 can be operated within a predetermined range in the up-down direction M1 relative to the nose portion 32. The push lever 79 is a switch member. Specifically, the push lever 79 can be moved from a first position (switch-off position) to a second position (switch-on position) by contacting the mating member 30.

[0020] The push lever 79 is constantly biased downward in the up-down direction M1 by a spring (biasing portion) 41 shown in Fig. 5 (described later). Therefore, the push lever 79 is always in the first position (switch-off position) when its tip is not pressed against the target material 30. On the other hand, when its tip is pressed against the target material 30 and moves to a predetermined position (second position) above the first position, the push lever 79 is switched on.

[0021] An electric motor 15 is also disposed within the motor case 21. The electric motor 15 is, for example, a brushless motor, and the rotation shaft of the electric motor 15 rotates about the center line A2. Furthermore, a speed reduction mechanism 16 to which power is transmitted from the rotation shaft of the electric motor 15 is provided within the motor case 21. The speed reduction mechanism 16 includes multiple planetary gear mechanisms, and is a mechanism that reduces the speed of an input element from the electric motor 15 and outputs it in a power transmission path.

[0022] The power of the electric motor 15 is reduced by the reduction mechanism 16 and transmitted to the winding mechanism 17. The winding mechanism 17 converts the rotational force of the rotary shaft of the electric motor 15 into a force that urges the striking part 12 upward in the vertical direction M1. Specifically, the winding mechanism 17 is equipped with a pinwheel 50 that engages with the driver blade 29, and the pinwheel 50 is rotated by the power of the electric motor 15. That is, the pinwheel 50 is rotated by the power of the electric motor 15, and the rotation of the pinwheel 50 pushes the driver blade 29 upward in the vertical direction M1 after striking. The pinwheel 50 is housed in a pinwheel housing 33.

[0023] A magazine unit 77 is also provided alongside the motor case 21. The magazine unit 77 can store a plurality of nails 78. The front end of the magazine unit 77 is supported by the nose unit 32, and the rear end is supported by the mounting unit 22. The magazine unit 77 is provided with a feeder unit 55 that sequentially feeds the stored plurality of nails 78 toward the ejection path 37, and a sensor unit 57 that detects the remaining number of nails 78 stored in the magazine unit 77 by detecting the feeder unit 55. The feeder unit 55 is attached to a rail unit 76 of the magazine unit 77 and is movable in the extension direction of the magazine unit 77. The plurality of nails 78 stored in the magazine unit 77 are sent by the feeder unit 55 to the ejection path 37 of the ejection unit 13. In other words, the nails 78 are supplied from the magazine unit 77 to the ejection unit 13 by the feeder unit 55.

[0024] The driving tool 10 is also provided with a trigger 53 that is operated by the operator and a trigger sensor (not shown). The trigger 53 and the trigger sensor are provided on the handle 20. The trigger sensor detects whether or not an operating force is applied to the trigger 53, and outputs a signal according to the detection result.

[0025] A controller 82 is also provided within the mounting portion 22. The controller 82 mainly controls the driving of the electric motor 15. The controller 82 has a microprocessor. A circuit board having an inverter circuit is also provided within the motor case 21. The inverter circuit has a plurality of switching elements, each of which can be turned on and off. The controller 82 controls the inverter circuit to control the rotation and stopping of the electric motor 15, or the rotation speed and rotation direction of the electric motor 15.

[0026] Next, an example of the operation of the driving tool 10 will be described. When the controller 82 detects that at least one of the following conditions is true: no operating force is being applied to the trigger 53, or the push lever 79 is not being pressed against the target object 30, the controller 82 stops supplying power to the electric motor 15. As a result, the electric motor 15 stops, and the striking unit 12 remains stopped at the standby position.

[0027] When the controller 82 detects that an operating force is being applied to the trigger 53 and that the push lever 79 is being pressed against the target material 30, it applies voltage from the power supply unit 14 to the electric motor 15, causing the electric motor 15 to rotate in the forward direction, thereby starting the driving operation. In other words, unless the controller 82 detects both that an operating force is being applied to the trigger 53 and that the push lever 79 is being pressed against the target material 30, it will not output a signal to apply voltage from the power supply unit 14 to the electric motor 15, and the driving operation will not start.

[0028] When the driving operation starts, the electric motor 15 is started. The rotational force of the electric motor 15 is transmitted to the pinwheel 50 via the speed reducer 16. When the pinwheel 50 rotates in a predetermined direction, the impact part 12 rises. When the impact part 12 rises, the gas pressure in the pressure chamber 26 increases.

[0029] When the final pin in the rotation of the pinwheel 50 in a predetermined direction separates from the final rack of the driver blade 29, the striking portion 12 descends due to the gas pressure in the pressure chamber 26. As the striking portion 12 descends due to the gas pressure in the pressure chamber 26, the driver blade 29 strikes one nail 78 located in the injection path 37, and the nail 78 is driven into the mating material 30.

[0030] Next, the detailed structure of the ejection unit 13 of this embodiment shown in Figures 5 to 8 will be described. The ejection unit 13 of this embodiment is equipped with a push lever (abutment unit) 79 that moves relative to the ejection unit 13 in the up-down direction M1 from an initial position by abutting against the target object 30 shown in Figure 1, and switches whether or not to strike by the striking unit 12. In other words, the push lever 79 is a member that, by abutting against the target object 30, moves from a switch-off position (no strike position) to a switch-on position (striking position), switching whether or not to strike.

[0031] The injection unit 13 has a blade guide (base) 34 and a guide plate (cover) 39 that are arranged side by side in the front-rear direction (second direction) N1 perpendicular to the up-down direction M1 and are combined in the front-rear direction N1. The blade guide 34 and the guide plate 39 define an injection path 37 that serves as a passage through which the nail 78 is injected. The blade guide 34 and the guide plate 39 also define an injection port 38 that serves as an exit of the injection path 37.

[0032] Furthermore, the injection unit 13 is provided with an adjuster 43 that can adjust the amount of driving of the nail 78 into the mating member 30. The adjuster 43 is supported by the support portion 34d of the blade guide 34 and the support portion 51a of the fixed plate 51 via a movable plate 43b.

[0033] 12 , which will be described later, when the blade guide 34 and the guide plate 39 are combined, the push lever 79 is sandwiched between the blade guide 34 and the guide plate 39 in the front-rear direction N1, and is thereby held adjacent to the front (one) side of the blade guide 34 in the front-rear direction N1. In other words, the push lever 79 is disposed between the blade guide 34 and the guide plate 39 combined in the front-rear direction N1, and is held adjacent to the support surface 34e on the front side of the blade guide 34.

[0034] As shown in FIG. 13 (described later), the push lever 79 has a push lever arm (restricting portion) 79b that restricts the end 34c of the blade guide 34 in the left-right direction (third direction) R1 from the rear (other) side in the front-rear direction N1. That is, the push lever 79 has the push lever arm 79b that restricts the end 34c of the blade guide 34 from its rear side. In other words, the push lever 79 is bifurcated into a main body 79a as a first portion that is located on the upper side and sandwiched between the blade guide 34 and the guide plate 39, and a push lever arm 79b as a second portion that is located on the lower side. Specifically, the push lever 79 is in a state in which the end 34c of the blade guide 34 is sandwiched between the main body 79a and the push lever arm 79b.

[0035] As a result, the push lever 79 is held adjacent to the front (one) side of the blade guide 34 in the front-to-rear direction N1 even when the blade guide 34 and the guide plate 39 are not combined together. In other words, even when the guide plate 39 is removed and the blade guide 34 and the guide plate 39 are not combined together, the push lever 79 is held adjacent to the front side of the blade guide 34 because the end 34c of the blade guide 34 is restricted from its rear side by the push lever arm 79b.

[0036] The push lever arm 79b is fixed by a bolt 79d to an arm portion 79c that protrudes from the main body portion 79a of the push lever 79. Furthermore, as shown in Figure 5, the push lever arm 79b is also fixed to the movable shaft 43a of the adjuster 43 (see Figure 9, which will be described later). Therefore, the movable shaft 43a of the adjuster 43 moves in conjunction with the movement of the push lever 79 in the up-down direction M1.

[0037] As shown in FIGS. 5 to 8 , the push lever 79 has a first guide portion that can come into contact with the nail 78 (see FIG. 1 ) in the left-right direction (third direction) R1. The first guide portion is a rib (contact portion-side rib) 79i that protrudes toward the front (one side) in the front-rear direction N1. Two ribs 79i are formed linearly on the push lever 79 and are arranged substantially parallel to each other, and the area between the two linear ribs 79i forms the ejection path 37, which is the passage for the nail 78. In other words, the nail 78 struck by the striking portion 12 moves down the ejection path 37 in the up-down direction M1 and is discharged from the ejection port 38. At this time, the rib 79i guides the movement of the nail 78 through the ejection path 37.

[0038] The push lever 79 can protrude from the ejection portion 13 toward the tip side, and the two ribs 79i are provided up to the vicinity of the tip of the push lever 79. In other words, the two ribs 79i extend up to the tip of the push lever 79 that protrudes from the ejection portion 13.

[0039] 5, the blade guide 34 has two claws (fixed portions) 34b onto which hooks (fixing members) 39b are hooked, which fix the guide plate 39 to the blade guide 34. An operating lever 39a is rotatably attached to the guide plate 39, and the hook 39b is rotatably connected to the lever 39a.

[0040] Therefore, when the operator pulls up the lever 39a, the hook 39b moves downward in conjunction with the operation of the lever 39a, whereby the hook 39b disengages from the two claw portions 34b of the guide plate 39, enabling the guide plate 39 to be removed. In other words, the guide plate 39 is a plate member that can be removed by the operator, and is attached so as to rotate about a hinge portion 40 provided in the injection unit 13 as a rotation axis.

[0041] In addition, the injection unit 13 is capable of performing maintenance to remove the nail 78, for example, when the nail 78 becomes clogged in the injection path 37 (injection port 38), and the guide plate 39 is removed when performing the maintenance.

[0042] Figure 6 shows the state in which the lever 39a is operated to disengage the hook 39b from the two claw portions 34b of the guide plate 39, and the guide plate 39 is removed from the blade guide 34, and the push lever 79 is not pushed upward in the vertical direction M1.

[0043] As shown in FIG. 8, the push lever arm 79b is fixed by a bolt 79d to the arm portion 79c that protrudes from the main body portion 79a of the push lever 79 as described above, and further, the push lever 79 is placed on the support surface 34e of the blade guide 34.

[0044] Therefore, the fixation between the push lever 79 and the push lever arm 79b can be released by removing the bolt 79d from the arm portion 79c of the push lever 79. Even when the push lever 79 shown in FIG. 6 is not pushed upward, the push lever 79 can be moved forward in the front-to-rear direction N1 to separate it from the blade guide 34. This makes it possible to perform maintenance such as removing a stuck nail 78, even when the push lever 79 is not pushed upward.

[0045] 7 shows a state in which the lever 39a is operated to disengage the hook 39b from the two claw portions 34b of the guide plate 39, thereby removing the guide plate 39 from the blade guide 34, with the push lever 79 being pushed upward in the up-down direction M1. Even in this state, the bolt 79d can be removed from the arm portion 79c of the push lever 79 to release the fixation between the push lever 79 and the push lever arm 79b, and the push lever 79 can be moved forward in the front-to-rear direction N1 to separate it from the blade guide 34.

[0046] Therefore, even if the push lever 79 is pushed upward, the push lever 79 can be removed from the blade guide 34 to perform maintenance such as removing a jammed nail 78.

[0047] In other words, regardless of the position of the push lever 79 in the vertical direction M1, the push lever 79 can be detached from the blade guide 34 by removing the bolt 79d from the arm portion 79c of the push lever 79, and maintenance such as removing a stuck nail 78 can be performed.

[0048] Next, the relationship between the initial position of the push lever 79 shown in Figures 9 to 11 and the adjustment of the adjuster 43 will be described. Here, the structure in which the push lever 79 is sandwiched between the guide plate 39 and the blade guide 34 shown in Figures 12 and 13 will be described in detail with reference to the exploded view of Figure 8.

[0049] The ejection unit 13 is equipped with an adjuster 43 that can adjust the depth to which the nail 78 is driven into the mating member 30 (see FIG. 1). Adjusting the adjuster 43 changes the initial position of the push lever 79, as shown in FIGS. 9 and 10. FIG. 9 shows the adjuster in its fully raised state, and FIG. 10 shows the adjuster in its fully lowered state. Furthermore, FIG. 11 shows the adjuster in its fully lowered state with the push lever 79 pushed in.

[0050] 8, the push lever 79 includes a main body 79a to which a push lever arm 79b, which serves as a restricting portion, is attached. Specifically, the push lever arm 79b is fixed by a bolt 79d to an arm 79c that protrudes from the main body 79a.

[0051] Furthermore, as shown in FIG. 9 , the push lever arm 79b is also fixed to the movable shaft 43a of the adjuster 43 by a bolt 43c. Therefore, the push lever 79 and the movable shaft 43a of the adjuster 43 move in conjunction with each other in the vertical direction M1. A spring (biasing member) 41 that biases the push lever 79 downward (to one side) in the vertical direction M1 from the initial position is provided at the end of the movable shaft 43a of the adjuster 43 opposite to the fixed side of the bolt 43c, together with the movable plate 43b. The movable plate 43b fixed to the adjuster 43 is connected to the support portion 34d of the blade guide 34 so as to be movable in the vertical direction M1.

[0052] As a result, the push lever 79 is constantly biased downward in the up-down direction M1 by the spring 41 via the movable shaft 43a and the push lever arm 79b.

[0053] 12 and 13, the push lever 79 has a main body 79a sandwiched between the blade guide 34 and the guide plate 39. Specifically, the push lever 79 has a main body 79a sandwiched between the blade guide 34 and the guide plate 39 in the front-rear direction N1, and is supported by the support surface 34e of the blade guide 34.

[0054] Here, the recess 39c of the guide plate 39 and the blade guide 34 form an injection port 38, and the main body 79a of the push lever 79 and the driver blade 29 are disposed in this injection port 38. Specifically, in the injection port 38, the driver blade 29 is disposed in an injection path 37 defined by the blade guide 34 and the guide plate 39, and moves in the vertical direction M1 guided by this injection path 37.

[0055] Since the push lever 79 also slides in the up-down direction M1, the guide plate 39, the blade guide 34, and the driver blade 29 act as guides for the sliding of the push lever 79. However, when the guide plate 39 is opened in the initial state of the push lever 79 shown in Figures 9 and 10 (the standby state of the driver blade 29), one side (the front side) of the push lever 79 is no longer guided.

[0056] Therefore, the push lever 79 clamps the end 34c of the blade guide 34 between its main body 79a and the abutment surface 79h of the push lever arm 79b. In other words, the push lever 79 is supported by the guide plate 39 and the blade guide 34, with the end 34c of the blade guide 34 sandwiched between its main body 79a and the push lever arm 79b. In other words, the end 34c of the blade guide 34 is restricted by the main body 79a and the push lever arm 79b of the push lever 79, and the push lever 79 also has the push lever arm 79b, so that the end 34c does not rise up from the blade guide 34 even when the guide plate 39 is in an open state.

[0057] 9 to 11, the push lever arm 79b is interposed between the main body 79a of the push lever 79 and the spring 41 in the up-down direction M1. In other words, the abutment surface 79h of the push lever arm 79b interposed between the main body 79a of the push lever 79 and the spring 41 suppresses (restricts) the push lever 79 from floating up in the front-rear direction N1.

[0058] 1, the push lever 79 moves from the initial position to a position on the upper (other) side in the vertical direction M1. For example, when the push lever 79 abuts against the target material 30 at the initial position P1 in the fully recessed state of the adjuster shown in FIG. 10, the push lever 79 is pushed in to the state shown in FIG. 11.

[0059] The blade guide 34 also has an engaging portion 34a with which the push lever arm 79b engages. As shown in Fig. 8, the engaging portion 34a is provided at a position on the upper (other) side, that is, on the side farther from the injection port 38 in Fig. 1 than the claw portion 34b in the up-down direction M1. In other words, the engaging portion 34a of the blade guide 34 is provided at the end 34c of the blade guide 34, above the claw portion 34b.

[0060] When the push lever 79 comes into contact with the mating member 30 at the initial position P1 in the fully recessed state of the adjuster shown in Figure 10, the push lever 79 moves while being restricted by the push lever arm 79b within the range of the engagement portion 34a shown in Figure 8, and is pushed in to the state shown in Figure 11 and stops.

[0061] That is, the push lever 79 can move within the range of the engagement portion 34a shown in FIG. 8 while being restricted by the push lever arm 79b.

[0062] Next, the first guide portion, second guide portion, and third guide portion provided in the nail driver 10 of this embodiment will be described. The first guide portion, second guide portion, and third guide portion guide the movement of the nail 78 in the injection path 37. As shown in FIG. 15 , the push lever 79 is formed with two ribs (first guide portions) 79i in the left-right direction R1 that can abut against the nail 78. As shown in FIG. 11 , the two ribs 79i are formed linearly and approximately parallel to each other, and the area between the two ribs 79i forms the injection path 37 through which the nail 78 passes. A flat surface 79j is formed in the injection path 37 of the push lever 79. In other words, the two ribs 79i guide the movement of the nail 78 as it moves in the injection path 37.

[0063] The two ribs 79i mainly guide the head 78b of the nail 78. However, they also guide not only the head 78b but also the body 78a of the nail 78 so that the tip thereof does not tilt in the left-right direction R1.

[0064] Here, a part of the head 78b of the nail 78 on the push lever 79 side is flattened. This allows the head 78b of the nail 78 to be stably supported on the flat surface 79j of the ejection path 37, and the nail 78 can move smoothly through the ejection path 37.

[0065] The push lever 79 can protrude from the injection portion 13 toward its tip end. The two ribs 79i extend to the tip of the push lever 79 protruding from the injection portion 13. As shown in Fig. 14, a nose cap 81 that protects the tip of the push lever 79 and the mating member 30 is attached to the tip of the push lever 79. In other words, as shown in Fig. 19, which will be described later, the two ribs 79i are formed up to the position of the nose cap 81 attached to the tip of the push lever 79.

[0066] 1 in the supply direction S1 (see FIG. 15) from the magazine unit 77 to the ejection unit 13. Here, the blade guide 34 and the push lever 79 are formed with a supply path 80 that supplies the nails 78 stored in the magazine unit 77 from the magazine unit 77 to the ejection unit 13. Specifically, the supply path 80 is a passage for the nails 78 that is formed by connecting a hole 80b formed in the blade guide 34 and a hole 80c formed in the push lever 79.

[0067] In other words, the supply path 80 is formed in the push lever 79 and the blade guide 34. The supply path 80 is connected to the injection path 37 of the injection unit 13 via the communication port 80a. Therefore, the nail 78 is supplied in the supply direction S1 through the supply path 80 consisting of the hole 80b and the hole 80c, and is placed in the injection path 37 via the communication port 80a.

[0068] As shown in FIG. 8 , the push lever 79 has a U-shaped slit 79m in its upper portion. The blade guide 34 and the push lever 79 are assembled together with the push lever 79 positioned on the blade guide 34. At this time, as shown in FIG. 16 , the convex portion 34g of the blade guide 34 is positioned in the slit 79m of the push lever 79, and the convex portion 34g of the blade guide 34 protrudes forward from the push lever 79 in the front-rear direction N1. The convex portion 34g of the blade guide 34 is formed over the entire U-shaped slit 79m of the push lever 79 in the up-down direction M1. In other words, in a region T1 (see FIG. 20 described later) including the region where the slit 79m of the push lever 79 is formed, the structure shown in FIG. 16 is achieved, in which the convex portion 34g of the blade guide 34 is positioned in the slit 79m of the push lever 79. That is, the region T1 including the region where the slit portion 79m of the push lever 79 is formed is a region where the communication port 80a that communicates with the supply path 80, which is a passage for the nails 78, is formed, and the nails 78 supplied from the supply path 80 are placed in this region T1. Therefore, in this region T1, the supply path 80 is formed only in the blade guide 34.

[0069] Here, the two ribs 79i are provided at positions spaced apart in the left-right direction R1 from the communication port 80a of the supply path 80 that leads to the injection portion 13. Specifically, as shown in FIG. 15 , each of the two ribs 79i is provided at a position spaced a distance L1 from the end of the communication port 80a. That is, the injection path 37 of the push lever 79 is provided with a flat surface 79j on which the nails 78 supplied from the supply path 80 are placed, and the nails 78 struck by the driver blade 29 slide along this flat surface 79j. One of the two ribs 79i is provided at one end of the flat surface 79j, and the other of the two ribs 79i is provided at the other end of the flat surface 79j.

[0070] In this way, the two ribs 79i are spaced apart from the communication port 80a, but are formed on both ends of the flat surface 79j that constitutes the injection path 37. In other words, the two ribs 79i are provided on the flat surface 79j that constitutes the injection path 37 of the push lever 79. As a result, when the nail 78 moves while sliding on the flat surface 79j, the left-right direction R1 is restricted by the ribs 79i formed on both ends of the flat surface 79j. In other words, the downward movement of the nail 78 in the up-down direction M1 in the injection path 37 can be guided by the two ribs 79i, and the nail 78 can be moved smoothly.

[0071] 15 and 16, the driver blade 29 of the striking portion 12 has an opposing surface (third surface) 29a that faces the push lever 79. This opposing surface 29a is formed with a groove (first striking portion groove) 29e that is recessed forward from a rear-facing side surface 29f located at the rear end of the driver blade 29 and extends in the vertical direction, and a groove (second groove, second striking portion groove) 29b that is provided within the groove 29e and into which a rib 79i is fitted. The push lever 79 is also provided with two ribs 79i that can guide the nail 78 (see FIG. 17) on both sides in the left-right direction R1, and a protrusion 29c that fits between the two ribs 79i of the push lever 79 is provided on the opposing surface 29a of the driver blade 29. In other words, the protrusion 29c is the bottom surface of the groove 29e, and the groove 29b is recessed further forward from the protrusion (bottom surface) 29c and extends in the vertical direction.

[0072] That is, the driver blade 29 has two grooves 29b that can accommodate the rib 79i of the push lever 79 that protrudes toward the driver blade 29 so as not to interfere with the rib 79i as it moves in the up-down direction M1 through the injection path 37. Furthermore, the opposing surface 29a of the driver blade 29 is provided with a protrusion 29c that fits between the two ribs 79i of the push lever 79, thereby guiding the movement of the driver blade 29 in the up-down direction M1 and allowing the driver blade 29 to move smoothly.

[0073] 16, the driver blade 29 has a rack 29d on its upper side. This rack 29d is a part that engages with the pinwheel 50 shown in FIG. 2 after striking the nail 78, and when the rack 29d engages with the pinwheel 50, the driver blade 29 is wound up to the standby position. Since the rack 29d is provided at an angle with respect to the left-right direction R1, the guide plate 39 is shaped to clear the rack 29d, and the rack 29d does not interfere with the guide plate 39.

[0074] Next, the second guide portion provided in the nail driving tool 10 will be described. The second guide portion is formed on the guide plate 39. As shown in Figures 17 and 18, a second guide portion that guides the head 78b of the nail 78 is formed on an opposing surface (first surface) 39d of the guide plate 39 that faces the push lever 79. The second guide portion is a groove (first groove) 39e that has an inclined surface (second surface) 39f that is inclined relative to the opposing surface 39d of the guide plate 39.

[0075] Specifically, a second guide portion is formed on the opposing surface 39d of the guide plate 39 to guide the head 78b of the nail 78 as the nail 78 moves. The second guide portion is a groove 39e including two inclined surfaces 39f formed substantially parallel to each other, and the head 78b of the nail 78 is guided by the two inclined surfaces 39f extending substantially parallel to each other in the up-down direction M1. Furthermore, because the groove 39e is formed, interference between the head 78b of the nail 78 and the opposing surface 39d of the guide plate 39 can be suppressed.

[0076] In addition, two inclined surfaces 39f are formed on the opposing surface 39d of the guide plate 39 over the entire area corresponding to the area where the rib 79i of the push lever 79 shown in Figure 20 is provided and the area T1.

[0077] Next, the third guide portion provided in the nail driver 10 will be described. Here, the blade guide 34 has a protrusion 34g that protrudes forward in the front-to-rear direction N1 beyond the push lever 79. This protrusion 34g is provided with a third guide portion that can abut against the nail 78 in the left-to-right direction R1. As shown in Figure 20, the third guide portion is a rib (base-side rib) 34h that is arranged linearly with the rib 79i in the up-down direction M1.

[0078] Like the ribs 79i, two ribs 34h are also arranged linearly and approximately parallel to each other. The two ribs 79i and the two ribs 34h are arranged linearly and approximately parallel to each other with the same spacing. The ribs 34h and 79i are both arranged to be able to enter the grooves (second striking portion grooves) 29b. That is, one rib 34h and one rib 79i are arranged linearly, and the other rib 34h and the other rib 79i are also arranged linearly and approximately parallel to each other. In other words, the push lever 79 has a groove-like flat surface (contact portion groove) 79j that is provided between the two ribs 79i, recessed rearward, and extending in the vertical direction. The blade guide 34 has a groove (base portion groove) 34i that is provided between the two ribs 34h, recessed rearward, and extending in the vertical direction. The grooves 79j and 34i are arranged linearly and connected in the vertical direction. Therefore, the two ribs 79i provided on the push lever 79 and the two ribs 34h provided on the blade guide 34 act as guides for the downward movement of the nail 78 in the up-and-down direction M1.

[0079] Each of the two ribs 79i has a tapered portion 79k formed adjacent to the corresponding one of the two ribs 34h. Specifically, the tapered portion 79k (see FIG. 8) is formed near the end of each of the two ribs 79i on the side adjacent to the rib 34h, so that the rib height decreases as it approaches the rib 34h.

[0080] As a result, the nail 78 that has been supplied through the supply path 80 and placed in the injection path 37 between the two ribs 34h is struck by the driver blade 29, and then when it switches from the injection path 37 between the two ribs 34h to the injection path 37 between the two ribs 79i, the nail 78 can be smoothly switched by the tapered portion 79k without getting caught in the joint portion.

[0081] FIG. 19 shows the push lever in the depressed position and the adjuster in the fully raised state, and FIG. 20 shows the nail supply position when the push lever is in the depressed position and the adjuster in the fully lowered state. For example, when driving a short nail 78, as shown in FIG. 19, the adjuster 43 is raised and the push lever 79 is extended by a protrusion amount L2 from the blade guide 34. In this case, the nail can be driven with a relatively weak driving force, which is suitable for driving short nails. At this time, because two ribs 79i are formed all the way to the tip of the push lever 79, the nail 78 is guided to the end even when the push lever 79 protrudes from the ejection part 13. In other words, even when the push lever 79 protrudes from the ejection part 13, the two ribs 79i allow the nail 78 to be guided to the end.

[0082] On the other hand, when driving a long nail 78, as shown in Figure 20, by lowering the adjuster 43, the driving force can be increased and the nail 78 can be driven deeper. Even in this case, the two ribs 79i are formed up to the tip of the push lever 79, so the nail 78 can be guided all the way to the end of the driving.

[0083] The state shown in FIG. 20 is a state in which the nail 78 is supplied from the supply path 80 and is on standby, and here the head 78 b of the nail 78 is guided by the blade guide 34 .

[0084] According to the driving tool 10 of this embodiment, the push lever 79 is provided with a rib 79i, so that the nail 78 struck by the driver blade 29 can be guided to the vicinity of the target material 30 by the rib 79i.

[0085] That is, the head 78b of the nail 78 can be guided by the ribs 79i on both sides, allowing the nail 78 to protrude straight and be guided to the vicinity of the mating material 30. In particular, the push lever 79 protrudes downward below the injection port 38 defined by the blade guide 34 and the guide plate 39. In other words, since the lower end of the push lever 79 is located below the lower ends of the blade guide 34 and the guide plate 39, providing the rib 79i on this push lever 79 allows the nail 78 to be guided to an area closer to the mating material 30 than the lower ends of the blade guide 34 and the guide plate 39.

[0086] This makes it difficult for the head 78b of the nail 78 to deviate in the left-right direction R1 relative to the tip of the driver blade 29, thereby preventing misalignment between the driving position of the nail 78 and the impact mark of the driver blade 29. As a result, the finished condition of the mating material 30 can be improved, and the convenience of the driving machine (work machine) 10 can be improved.

[0087] Furthermore, by providing the rib 79i on the push lever 79, the main body 78a of the nail 78 can also be guided as the nail 78 moves. As a result, the nail 78 can be prevented from protruding at an angle from the tip of the push lever 79, and misalignment between the driving position of the nail 78 and the impact mark of the driver blade 29 can be prevented. This improves the finish of the target material 30 and improves the convenience of the nail driving tool 10.

[0088] If the rib 79i were not provided, the tip of the nail 78 would be misaligned, causing the nail 78 to be driven at an angle, and the driven driver blade 29 would be misaligned to the side of the head 78b of the nail 78, leaving a dent of the driver blade 29 next to the head 78b in the mating material 30. However, in the driving tool 10 of this embodiment, the two ribs 79i provided on the push lever 79 make it difficult for the head 78b of the nail 78 to be misaligned in the left-right direction R1, so the dent of the driver blade 29 does not shift from the position of the head 78b of the nail 78. Therefore, the provision of the two ribs 79i makes it possible to prevent the driver blade 29 from leaving a dent in the mating material 30.

[0089] Furthermore, by providing two inclined surfaces 39f on the opposing surface 39d of the guide plate 39, the head 78b of the nail 78 can be guided by the two inclined surfaces 39f as the nail 78 moves. This makes it difficult for the head 78b of the nail 78 to deviate in the left-right direction R1 relative to the tip of the driver blade 29, thereby preventing misalignment between the driving position of the nail 78 and the impact mark of the driver blade 29. As a result, the finished condition of the target material 30 can be improved, and the convenience of the driving tool 10 can be improved.

[0090] Furthermore, two ribs 34h are provided on the protrusion 34g of the blade guide 34 in a straight line aligned with the two ribs 79i of the push lever 79, so that the nail 78 supplied from the supply path 80 can be positioned, and the two ribs 34h can guide the movement of the nail 78 struck by the driver blade 29. This allows the head 78b of the struck nail 78 to be guided, allowing the nail 78 to move smoothly between the two ribs 79i.

[0091] The present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, in the above embodiment, the two ribs 79i provided on the push lever 79 are provided at both ends of the flat surface 79j of the push lever 79. However, the ribs 79i do not necessarily have to be provided at the ends of the flat surface 79j, and may be provided in an area inside the ends of the flat surface 79j, as long as they are located in a position that can guide the movement of the nail 78.

[0092] 10... driving machine (work machine), 11... housing, 12... striking section, 13... injection section, 14... power supply section, 15... electric motor, 16... reduction mechanism, 17... winding mechanism, 18... pressure accumulator vessel, 19... cylinder case, 20... handle, 21... motor case, 21a... extension section, 22... mounting section, 23... cap, 24... holder, 25... head cover, 26... pressure chamber, 27... cylinder, 28... piston, 29... driver blade, 29a... opposing surface (third surface), 29b... groove (second groove), 29c... protrusion, 29d... rack, 30... mating member, 31... bumper support portion, 32... nose portion, 33... pinwheel accommodating portion, 34... blade guide (base portion), 34a... engagement portion, 34b... claw portion (fixed portion), 34c... end portion, 34d... support portion, 34e... support surface, 34g... convex portion, 34h... rib (third guide portion), 35... bumper, 36... guide hole, 37... injection path, 38... injection port, 39... guide plate (cover portion), 39a... lever, 39b... hook (fixing member), 39c... recessed portion, 39d... opposing surface (first surface) , 39e...groove (first groove, second guide portion), 39f...inclined surface (second surface), 40...hinge portion, 41...spring (urging portion), 43...adjuster, 43a...movable shaft, 43b...movable plate, 43c...bolt, 50...pinwheel, 51...fixed plate, 51a...support portion, 53...trigger, 55...feeder portion, 57...sensor portion, 76...rail portion, 77...magazine portion, 78...nail (fastener), 78a...main body portion, 78b...head portion, 79...push lever (contact portion), 79a...main body portion, 79b...push Schleber arm (regulating portion), 79c...arm portion, 79d...bolt, 79h...contact surface, 79i...rib (first guide portion), 79j...flat surface, 79k...tapered portion, 79m...slit portion, 80...supply path, 80a...communication port, 80b, 80c...hole portion, 81...nose cap, 82...controller, A1, A2...center line, L1...distance, L2...projection amount, M1...vertical direction (first direction), N1...front-rear direction (second direction), P1...initial position, R1...left-right direction (third direction), S1...supply direction, T1...area

Claims

1. A work machine comprising: an ejection section that supports a fastener; an impact section that impacts the fastener located on the ejection section in a first direction; an abutment section that moves relative to the ejection section from an initial position in the first direction by abutting against an opposing material, switching whether the impact section can impact or not; and a magazine section that supplies the fastener to the ejection section, wherein the ejection section has a base section and a cover section that are combined in a second direction perpendicular to the first direction, and the ejection section has an ejection path that is a passage through which the fastener is ejected and an ejection outlet that is an exit of the ejection path, the abutment section is held adjacent to one side of the base in the second direction by being sandwiched between the base section and the cover section in the second direction when the base section and the cover section are combined, and the abutment section has a first guide section that can abut against the fastener in a third direction that is perpendicular to the first direction and the second direction.

2. A work machine as described in claim 1, wherein the abutment portion is capable of protruding from the injection portion toward the tip end, and the first guide portion extends to the tip end of the abutment portion.

3. A work machine as described in claim 2, wherein the first guide portion is a rib that protrudes in the direction in which the fastener is supplied from the magazine portion to the ejection portion.

4. A work machine as described in claim 3, further comprising a supply path for supplying the fasteners from the magazine section to the ejection section, and wherein the first guide section is provided at a position spaced apart in the third direction from a communication port of the supply path that leads to the ejection section.

5. A work machine according to claim 4, wherein the supply passage is formed in the contact portion.

6. A work machine as set forth in claim 1, wherein a second guide portion for guiding the head of the fastener is formed on a first surface of the cover portion opposite the abutting portion.

7. A work machine according to claim 6, wherein the second guide portion is a first groove having a second surface inclined relative to the first surface.

8. A work machine as described in claim 1, wherein the base has a convex portion that protrudes from the abutment portion to one side in the second direction, and the convex portion is provided with a third guide portion that can abut against the stopper in the third direction.

9. A work machine as described in claim 8, wherein the third guide portion is arranged in a straight line alongside the first guide portion in the first direction, and the first guide portion has a tapered portion formed adjacent to the third guide portion.

10. A work machine as described in claim 1, wherein the impact portion has a third surface facing the abutment portion, and a second groove is formed in the third surface to accommodate the first guide portion.

11. A work machine as described in claim 10, wherein the abutment portion has two first guide portions that can guide the stopper on both sides in the third direction, and the third surface is provided with a protrusion that fits between the two first guide portions.

12. A work machine comprising: an ejection section having an ejection path which is a passage through which a fastener is ejected; an impact section which strikes the fastener located in the ejection section in a first direction; and an abutment section which moves relative to the ejection section from an initial position in the first direction by abutting against an opposing material, switching whether or not the impact section can strike, wherein the impact section has: a side surface facing a second direction perpendicular to the first direction; a first impact section groove section which is recessed from the side surface in the second direction and extends in the first direction; and a second impact section groove section which is further recessed from the bottom surface of the first impact section groove in the second direction and extends in the first direction.

13. A work machine as described in claim 12, wherein the base has two base side ribs that protrude toward the side in the second direction and can enter the second striking portion side groove portion, and a base side groove portion that is provided between the two base side ribs and extends in the first direction.

14. A work machine as described in claim 12, wherein the abutment portion has two abutment portion side ribs that protrude toward the side surface in the second direction and can enter the second striking portion side groove portion, and an abutment portion side groove portion that is provided between the two abutment portion side ribs and extends in the first direction.

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