Contact tool and work machine

Abstract

To provide a contact tool and a work machine with improved convenience.SOLUTION: A nose cap 70 can be attached to an injection part 3 of a driving machine 1A in different two or more installation modes. The nose cap 70 has: an installation part 71 which is attached to the injection part 3 in a first installation mode; an installation part 72 which is attached to the injection part 3 in a second installation mode; a contact part 73 which is positioned in the front of an injection port of the driving machine 1A and is brought into contact with a mating material W into which a stopper is driven when the installation part 71 is attached to the injection part 3; and a contact part 74 which is positioned in the front of the injection port of the driving machine 1A and is brought into contact with the mating material W into which the stopper is driven when the installation part 72 is attached to the injection part 3. The contact part 73 and the contact part 74 can contact the mating material W in similar contact states.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a contact tool and a working machine. [Background technology]

[0002] There is known a machine for driving fasteners into a mating material such as a wooden board or a plaster board. Such a machine is generally called a "driving machine." The driving machine has an ejection section that includes an ejection port from which the fastener is ejected.

[0003] When using a fastener driving machine to drive a fastener into a mating material, a contact tool may be attached to the injection part (Patent Document 1). The contact tool is attached for the purposes of protecting the mating material and adjusting the amount (depth) of the fastener driven into the mating material. Such a contact tool is sometimes called a "nose cap." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-98256 Summary of the Invention [Problem to be solved by the invention]

[0005] There is a demand for improved convenience of contact devices and working machines. [Means for solving the problem]

[0006] The abutment tool according to one embodiment can be attached to an ejection section of a work machine including an ejection port through which a fastener is ejected in two or more different attachment modes. The abutment tool has a first attachment part attached to the ejection section in a first attachment mode, a second attachment part attached to the ejection section in a second attachment mode, a first abutment part that is located ahead of the ejection port in the ejection direction of the fastener and abuts against a mating material into which the fastener is driven when the first attachment part is attached to the ejection section, and a second abutment part that is located ahead of the ejection port in the ejection direction of the fastener and abuts against the mating material into which the fastener is driven when the second attachment part is attached to the ejection section. The first abutment part and the second abutment part can abut against the mating material in a similar abutment state. Effect of the Invention

[0007] According to the present invention, a contact tool and a working machine with improved convenience are realized. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is an explanatory diagram showing a configuration of a work machine according to an embodiment. [Diagram 2] 2 is a side view showing the emission section and its vicinity shown in FIG. 1. [Diagram 3] 2 is a cross-sectional view showing an emission section and its vicinity shown in FIG. 1. [Figure 4] FIG. 2 is a front view showing the emission section shown in FIG. [Diagram 5] 2 is a cross-sectional view showing the injection section shown in FIG. 1. [Figure 6] FIG. 4 is an explanatory diagram showing a nose cap. [Figure 7] FIG. 2 is an enlarged cross-sectional view of the nose cap. [Figure 8] FIG. 4 is a side view showing the ejection section and its vicinity with the nose cap removed. [Figure 9] 4 is a cross-sectional view showing the ejection section and its vicinity with the nose cap removed. FIG. [Figure 10] FIG. 2 is a front view showing the injection section with the nose cap removed. [Figure 11] FIG. 2 is a cross-sectional view showing the injection section with the nose cap removed. [Figure 12] 10A to 10C are explanatory diagrams showing an example of a procedure for changing the manner in which the nose cap is attached. [Figure 13] 13A to 13C are other explanatory diagrams showing an example of a procedure for changing the manner in which the nose cap is attached. [Figure 14] FIG. 11 is an enlarged cross-sectional view of a nose cap according to another embodiment. [Figure 15] FIG. 11 is an enlarged cross-sectional view of a nose cap according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an example of an embodiment will be described with reference to the drawings. In all drawings for describing the embodiment, the same or substantially the same configurations and elements are designated by the same reference numerals. In addition, as a rule, once a configuration or element has been described, it will not be described repeatedly.

[0010] <Overview of the driver> Fig. 1 is an explanatory diagram showing the configuration of a working machine 1A according to the present embodiment. The working machine 1A shown in Fig. 1 is used to drive fasteners such as nails and staples into a mating material W such as a wooden board or a plaster board. Therefore, in the following description, the working machine 1A will be referred to as a "driving machine 1A."

[0011] The driving machine 1A has a housing 2, an ejection unit 3, a magazine 4, etc. A battery pack 5 is attached to the housing 2. The battery pack 5 includes a plurality of secondary batteries (for example, lithium ion batteries) and is detachable from the housing 2.

[0012] When a predetermined condition is satisfied, the driving machine 1A ejects a nail from the ejection unit 3 and drives the nail into the target material W. More specifically, the driving machine 1A has an electric motor 44 that is operated by power supplied from the battery pack 5, a striking unit 30 that is operated by receiving the driving force of the electric motor 44, and the like.

[0013] When a predetermined condition is satisfied, power is supplied from the battery pack 5 to the electric motor 44, and the electric motor 44 is operated. Then, the nail sent from the magazine 4 to the ejection unit 3 is struck by the striking unit 30. The nail struck by the striking unit 30 is ejected from the ejection unit 3 and driven into the target material W. The electric motor 44 and the striking unit 30 will be described later.

[0014] <Housing> The housing 2 has a striking mechanism accommodating chamber 10, a motor accommodating chamber 11, a handle 12, and a connecting portion 13. One end of the motor accommodating chamber 11 and the handle 12 are connected to the striking mechanism accommodating chamber 10. The other end of the motor accommodating chamber 11 and the handle 12 are connected to the connecting portion 13 that is approximately parallel to the striking mechanism accommodating chamber 10. In other words, the striking mechanism accommodating chamber 10, the motor accommodating chamber 11, the handle 12, and the connecting portion 13 are integrated.

[0015] Here, the longitudinal direction of the striking mechanism housing chamber 10 shown in Fig. 1 is defined as the "up-down direction", and the longitudinal direction of the motor housing chamber 11 and the handle 12 is defined as the "front-rear direction". In addition, the direction perpendicular to the up-down direction and the front-rear direction is defined as the "left-right direction". However, these definitions are merely for the convenience of explanation.

[0016] According to the above definition, the motor housing chamber 11 is located below the handle 12 and extends rearward from the striking mechanism housing chamber 10. On the other hand, the handle 12 is located above the motor housing chamber 11 and extends rearward from the striking mechanism housing chamber 10.

[0017] The driving machine 1A shown in Fig. 1 shoots out nails downward. That is, the shooting direction in this embodiment is from top to bottom in Fig. 1.

[0018] The housing 2 is composed of two housing members, but only one of the housing members is shown in Fig. 1. The housing member not shown is butted against and fixed to the housing member shown in the figure. In other words, the housing 2 including the striking mechanism accommodating chamber 10, the motor accommodating chamber 11, the handle 12, and the connecting portion 13 is formed by the two housing members butted against and fixed to each other.

[0019] At least a portion of the surface of the housing 2 is covered with a soft member. More specifically, at least a portion of the surface of the housing 2 is covered with a resin layer (elastomer layer) formed (laminated) on the surface of the housing 2 by two-layer molding (two-color molding).

[0020] <Injection part> The ejection unit 3 is provided below the striking mechanism housing chamber 10 and in front of the magazine 4. Fig. 2 is a side view showing the ejection unit 3 and its vicinity. Fig. 3 is a cross-sectional view showing the ejection unit 3 and its vicinity.

[0021] Fig. 4 is a front view showing the injection unit 3. Fig. 5 is a cross-sectional view showing the injection unit 3. The cross section shown in Fig. 3 is taken along line BB in Fig. 4, and the cross section shown in Fig. 5 is taken along line AA in Fig. 2.

[0022] 3, the injection section 3 includes a plate guide 22 and a guide plate 23 which form the injection port 20 and the injection path 21 which leads to the injection port 20. The plate guide 22 and the guide plate 23 face each other, and the injection port 20 and the injection path 21 are formed by the space (gap) between the plate guide 22 and the guide plate 23 which face each other.

[0023] The injection unit 3 further includes a detection unit 24. The detection unit 24 extends in the vertical direction along the injection path 21, and is movable in the vertical direction relative to the injection port 20.

[0024] A contact portion 25 is provided at the tip (lower end) of the detection portion 24. The contact portion 25 is located on one side of the injection port 20 in the front-rear direction. More specifically, the contact portion 25 is located rearward of the injection port 20. From another perspective, the contact portion 25 is offset rearward with respect to the injection port 20. It is clear from the above explanation that the front-rear direction is a cross direction that crosses the nail injection direction.

[0025] The detection portion 24, including the contact portion 25, is constantly biased downward by a biasing member. When the contact portion 25 is pressed against the mating material W, the detection portion 24 moves upward against the biasing force of the biasing member. From another perspective, when the detection portion 24 is pressed against the mating material W, it rises relative to the injection port 20. In the following description, the detection portion 24 may be referred to as the "push lever 24."

[0026] <Strike section> Referring again to Figure 1, as described above, the driving machine 1A includes the striking unit 30. More specifically, the driving machine 1A includes the plunger 31 that is driven in the vertical direction, and the driver blade 32 that is attached to the plunger 31.

[0027] The plunger 31 includes a cylindrical portion, a plurality of arm portions, a connecting pin, etc. The cylindrical portion extends upward, the connecting pin is disposed in front of the cylindrical portion, and the arm portions are disposed behind the cylindrical portion.

[0028] The connecting pin of plunger 31 protrudes forward and is inserted into a connecting hole provided at the upper end of driver blade 32. The tip of each arm portion is bent approximately 90 degrees to form an engagement portion.

[0029] <Magazine> The magazine 4 stores nails to be struck by the striking unit 30. The magazine 4 includes a supply mechanism (feeder) that feeds the stored nails to the ejection unit 3 one by one.

[0030] The nails sent from the magazine 4 to the ejection section 3 are struck by the driver blade 32 moving downward in the ejection path 21 (Fig. 3). More specifically, the driver blade 32 moving downward strikes the head of the nail waiting in the ejection path 21. The nail struck by the driver blade 32 is ejected from the ejection port 20 (Fig. 3) and driven into the target material W.

[0031] <Drive mechanism and biasing mechanism> The striking portion 30 is moved in the up and down direction by the driving mechanism 40 and the biasing mechanism 50. More specifically, the driving mechanism 40 moves the striking portion 30 upward, and the biasing mechanism 50 moves the striking portion 30 downward. In other words, the driving mechanism 40 and the biasing mechanism 50 move the striking portion 30 in opposite directions.

[0032] The drive mechanism 40 and the biasing mechanism 50 are accommodated in the impact mechanism accommodating chamber 10 of the housing 2. The drive mechanism 40 has a first gear 41, a second gear 42, and a third gear 43 that are rotatably supported.

[0033] A rotational driving force output from an electric motor 44 is input to the first gear 41 via a planetary gear type reduction mechanism 45. The second gear 42 is interposed between the first gear 41 and the third gear 43, and is in mesh with the first gear 41 and the third gear 43. Therefore, the rotational driving force input to the first gear 41 is transmitted to the third gear 43 via the second gear 42. In other words, the first gear 41, the second gear 42, and the third gear 43 are rotationally driven by the electric motor 44.

[0034] The electric motor 44 operates to output a rotational driving force when a predetermined condition is satisfied. More specifically, when the predetermined condition is satisfied, power is supplied from the battery pack 5 to the electric motor 44 under the control of the controller 46, and the electric motor 44 operates. The predetermined condition includes an operation of the trigger lever 6 and an upward movement of the push lever 24.

[0035] The biasing mechanism 50 has a coil spring 51 that is expandable and contractable in the vertical direction, and a guide shaft 52 that is inserted through the coil spring 51 and guides the expansion and contraction of the coil spring 51.

[0036] The plunger 31 of the striking portion 30 is disposed around the lower portion of the coil spring 51. More specifically, the cylindrical portion of the plunger 31 is inserted into the lower portion of the coil spring 51. The guide shaft 52 passes through the cylindrical portion of the plunger 31.

[0037] When the first gear 41 of the drive mechanism 40 rotates, a cam roller provided on the first gear 41 engages with the arm portion of the plunger 31, pushing up the plunger 31. Then, the plunger 31 moves upward while compressing the coil spring 51.

[0038] Thereafter, a cam roller provided on the second gear 42 engages with the other arm portion of the plunger 31, further pushing up the plunger 31. Next, another cam roller provided on the second gear 42 engages with the other arm portion of the plunger 31, pushing up the plunger 31 to a predetermined position (top dead center). The coil spring 51 is gradually compressed by the plunger 31 rising in this manner.

[0039] Here, a cylindrical counterweight 60 is disposed around the upper periphery of the coil spring 51. A cylindrical portion similar to the cylindrical portion of the plunger 31 is provided inside the counterweight 60, and this cylindrical portion is inserted into the upper portion of the coil spring 51.

[0040] When the third gear 43 of the drive mechanism 40 rotates, a cam roller provided on the third gear 43 engages with the counterweight 60, and pushes the counterweight 60 down to a predetermined position (bottom dead center). From another perspective, the counterweight 60 moves downward while compressing the coil spring 51, and reaches the bottom dead center.

[0041] In other words, the striking portion 30 rises while compressing the coil spring 51, and the counterweight 60 descends while compressing the coil spring 51. From another perspective, the coil spring 51 is compressed from above and below and accumulates elastic energy.

[0042] When the striking part 30 rises to a predetermined position (top dead center), the plunger 31 is disengaged from the cam roller of the second gear 42. The plunger 31 is then pushed downward by the elastic energy of the coil spring 51. At this time, the counterweight 60 is restricted from moving upward by the latch 61. In other words, the counterweight 60 remains at the bottom dead center even after the striking part 30 starts to descend.

[0043] When the striking portion 30 descends to a predetermined position, the restriction on the movement of the counterweight 60 is released. Then, the counterweight 60 is pushed upward by the elastic energy of the coil spring 51.

[0044] In other words, the striking part 30 descends while the counterweight 60 ascends. By the striking part 30 and the counterweight 60 moving in opposite directions in this manner, the impact (recoil) when the striking part 30 strikes a nail is reduced.

[0045] The timing at which the striking section 30 starts to descend and the timing at which the counterweight 60 starts to rise can be changed as appropriate. In some embodiments, the reaching of the counterweight 60 to the bottom dead center is detected by a switch or a sensor.

[0046] <Abutment tool> As shown in Fig. 1, an abutment tool 70 is attached to the driving machine 1A. More specifically, the abutment tool 70 is attached to the injection section 3 of the driving machine 1A. The abutment tool 70 can be attached to and detached from the injection section 3 as needed. In the following description, the abutment tool 70 may be referred to as a "nose cap 70."

[0047] Fig. 6 is an explanatory diagram showing the nose cap 70. Fig. 7 is an enlarged cross-sectional view of the nose cap 70 taken along line XX in Fig. 6. The nose cap 70 has an integrally molded mounting portion 71, mounting portion 72, contact portion 73 and contact portion 74. From another perspective, the nose cap 70 has one set of the mounting portion 71 and the contact portion 73, and another set of the mounting portion 72 and the contact portion 74.

[0048] The nose cap 70 of the present embodiment is integrally molded from thermoplastic polyurethane, but there is no particular limitation on the material of the nose cap 70. For example, the nose cap 70 may be formed from rubber.

[0049] <Attachment part> Nose cap 70 can be attached to ejection unit 3 in two or more different attachment modes. More specifically, nose cap 70 can be attached to ejection unit 3 in a first attachment mode and a second attachment mode. In the first attachment mode, attachment portion 71 is attached to ejection unit 3, and in the second attachment mode, attachment portion 72 is attached to ejection unit 3.

[0050] From another perspective, a state in which mounting portion 71 is mounted to injection portion 3 is a first mounting state of nose cap 70, and a state in which mounting portion 72 is mounted to injection portion 3 is a second mounting state of nose cap 70. The mounting state of nose cap 70 shown in Fig. 1 is the first mounting state.

[0051] <Mounting hole> 7, mounting portion 71 has a mounting hole 71a with one end closed, and mounting portion 72 has a mounting hole 72a with one end closed. Mounting hole 71a and mounting hole 72a do not communicate with each other and are independent of each other. As a result, mounting portion 71 and mounting portion 72 have a cylindrical shape with one end closed.

[0052] The mounting hole 71a is a square hole extending along the longitudinal direction of the mounting portion 71, and the mounting hole 72a is a square hole extending along the longitudinal direction of the mounting portion 72. Although details will be described later, in the first mounting state, the ejection unit 3 is inserted into the mounting hole 71a of the mounting portion 71. On the other hand, in the second mounting state, the ejection unit 3 is inserted into the mounting hole 72a of the mounting portion 72.

[0053] Fig. 8 is a side view showing the injection part 3 and its vicinity with the nose cap 70 removed. Fig. 9 is a cross-sectional view showing the injection part 3 and its vicinity with the nose cap 70 removed.

[0054] Fig. 10 is a front view showing the injection unit 3 with the nose cap 70 removed. Fig. 11 is a cross-sectional view showing the injection unit 3 with the nose cap 70 removed. The cross section shown in Fig. 9 is taken along line DD in Fig. 10, and the cross section shown in Fig. 11 is taken along line CC in Fig. 8.

[0055] 2 to 5 and 8 to 11, it can be seen that in the first mounting state, mounting portion 71 is mounted to ejection portion 3. More specifically, it can be seen that in the first mounting state, contact portion 25 of push lever 24 is inserted into mounting hole 71a. Although not shown, in the second mounting state, contact portion 25 of push lever 24 is inserted into mounting hole 72a.

[0056] 7, mounting portion 71 and mounting portion 72 extend in intersecting directions. More specifically, mounting portion 71 and mounting portion 72 extend in directions perpendicular to each other and are connected via connecting portion 75 that extends obliquely relative to the mounting portion 71 and mounting portion 72.

[0057] As described above, the mounting hole 71a extends along the longitudinal direction of the mounting portion 71, and the mounting hole 72a extends along the longitudinal direction of the mounting portion 72. Therefore, like the mounting portion 71 and the mounting portion 72, the mounting hole 71a and the mounting hole 72a extend in directions perpendicular to each other.

[0058] ≪Contact part≫ The contact portion 73 forms the bottom surface of the mounting portion 71, and the contact portion 74 forms the bottom surface of the mounting portion 72. The contact portion 73 abuts against the mating material W in the first mounting state, and the contact portion 74 abuts against the mating material W in the second mounting state.

[0059] From another perspective, the abutment portion 73 is an end face of the nose cap 70 that abuts against the mating material W when the mounting portion 71 is mounted on the injection unit 3. On the other hand, the abutment portion 74 is the other end face of the nose cap 70 that abuts against the mating material W when the mounting portion 72 is mounted on the injection unit 3.

[0060] The contact portion 73 and the contact portion 74 are flat surfaces having the same or substantially the same area. Therefore, the contact portion 73 and the contact portion 74 can come into contact with the target material W in the same contact state. In other words, the nose cap 70 can be attached to the injection part 3 of the driving tool 1A in two or more different attachment modes, and can come into contact with the target material W in the same contact state in any attachment mode.

[0061] "Similar contact state" means that the shapes of the contact surfaces that contact the mating material W are the same. For example, if one contact surface is an end face of a single protrusion that protrudes ahead in the injection direction (i.e., a single surface) and the other contact surface is an end face of multiple protrusions that protrude ahead in the injection direction (i.e., multiple surfaces that are spaced apart from each other), the one contact surface and the other contact surface cannot contact the mating material W in a similar contact state.

[0062] In this embodiment, the mounting portion 71 corresponds to the first mounting portion, the mounting portion 72 corresponds to the second mounting portion, the contact portion 73 corresponds to the first contact portion, and the contact portion 74 corresponds to the second contact portion. Also, the mounting hole 71a corresponds to the first mounting hole, and the mounting hole 72a corresponds to the second mounting hole.

[0063] <Changes in wearing style> Next, a description will be given of an example of a procedure for changing the wearing state of the nose cap 70. Figures 12 and 13 are explanatory diagrams showing an example of a procedure for changing the wearing state of the nose cap 70 from the first wearing state to the second wearing state.

[0064] The nose cap 70 is attached in a first attachment mode to the injection part 3 shown on the left side of Fig. 12. More specifically, as shown in Fig. 3, the contact part 25 of the push lever 24 is inserted into the attachment part 71 (attachment hole 71a) of the nose cap 70. At this time, the abutment part 73 is located ahead (below) of the injection port 20 in the injection direction. Also, the attachment part 72 including the attachment hole 72a is located behind the injection port 20.

[0065] In Figures 12 and 13, a dot pattern is applied to mounting portion 72 in order to clearly distinguish between mounting portion 71 and mounting portion 72 of nose cap 70, but no dot pattern is actually applied to the surface of mounting portion 72.

[0066] First, remove the nose cap 70 from the injection part 3 (push lever 24) shown in Fig. 12(a). When the nose cap 70 is grasped and pulled in the injection direction (downward), the nose cap 70 comes off from the push lever 24.

[0067] Thereafter, as shown in Fig. 12(b), the removed nose cap 70 is turned upside down, and then, as shown in Fig. 12(c), the nose cap 70 is turned upside down.

[0068] 13(a), the orientation of the removed nose cap 70 is changed so that the mounting portion 72 is positioned below the contact portion 25 of the push lever 24. Therefore, the order of performing the up-down inversion and the front-back inversion may be reversed.

[0069] Thereafter, the contact portion 25 of the push lever 24 is inserted into the mounting portion 72 (mounting hole 72a) of the nose cap 70. Then, as shown in Fig. 13(b), the nose cap 70 is mounted to the injection portion 3 in the second mounting mode. At this time, the abutment portion 74 is located ahead of (below) the injection port 20 in the injection direction. Also, the mounting portion 71 including the mounting hole 71a is located behind the injection port 20.

[0070] By changing the mounting manner of the nose cap 70 in the above-described procedure, the end face of the nose cap 70 that abuts against the counter material W is changed from the abutment portion 73 to the abutment portion 74. However, as described above, the abutment portion 73 and the abutment portion 74 are flat surfaces having the same or substantially the same area.

[0071] Therefore, even if the contact portion 73 becomes worn or dirty, the work can be continued by changing the attachment mode of the nose cap 70. In other words, even if the contact portion 73 becomes worn or dirty, there is no need to prepare a new nose cap 70.

[0072] From another perspective, the nose cap 70 has two end faces (contact surfaces) that can be brought into contact with the mating material W. Furthermore, the two end faces (contact surfaces) can be brought into contact with the mating material W in a similar contact state. As a result, the nose cap 70 has twice the lifespan of other nose caps that have only one end face (contact surface) that comes into contact with the mating material W.

[0073] In either mounting mode, the unused mounting part is disposed rearward of the ejection port 20. More specifically, in the first mounting mode, the unused mounting part (mounting part 72) is disposed rearward of the ejection port 20. On the other hand, in the second mounting mode, the unused mounting part (mounting part 71) is disposed rearward of the ejection port 20. Therefore, the unused mounting part does not obstruct visual inspection of the nail driving position or its vicinity.

[0074] <Modifications of the abutment tool> 14 and 15 are enlarged cross-sectional views of a nose cap 70 according to another embodiment. In the nose cap 70 shown in Fig. 14, the lengths of the mounting portion 71 and the mounting portion 72 are different. More specifically, the length L2 of the mounting portion 72 is longer than the length L1 of the mounting portion 71 (L2>L1).

[0075] As a result, when the nose cap 70 shown in Figure 14 is used, the distance along the injection direction from the injection port 20 to the abutment portion 73 in the first mounting state is different from the distance along the injection direction from the injection port 20 to the abutment portion 74 in the second mounting state.

[0076] Specifically, the distance along the injection direction from the injection port 20 to the contact portion 74 in the second mounting state is longer than the distance along the injection direction from the injection port 20 to the contact portion 73 in the first mounting state.

[0077] Here, the distance along the injection direction from the injection port 20 to the contact portions 73, 74 corresponds to the distance along the injection direction from the injection port 20 to the mating material W. Therefore, by changing the mounting manner of the nose cap 70 shown in Fig. 14, the distance from the injection port 20 to the mating material W changes, and the amount (depth) of driving the nail into the mating material W changes.

[0078] In other words, by changing the mounting state of the nose cap 70 shown in FIG. 14, the driving amount (depth) of the nail into the mating material W can be adjusted.

[0079] However, the driving machine 1A is provided with an adjustment mechanism for changing the driving amount (depth), so that the driving amount (depth) can be adjusted without using the nose cap 70.

[0080] However, by using the nose cap 70, it is possible to change the amount of impact (depth) without using an adjustment mechanism. Also, by using the nose cap 70 in combination with an adjustment mechanism, the range of adjustment is expanded.

[0081] 15, the mounting portion 71 and the mounting portion 72 are provided parallel to each other. As a result, the mounting hole 71a provided in the mounting portion 71 and the mounting hole 72a provided in the mounting portion 72 extend parallel to each other.

[0082] However, the nose caps 70 shown in Figures 14 and 15 also have the abutment parts 73 and 74. Therefore, these nose caps 70 also have twice the lifespan of other nose caps that have only one end surface (abutment surface).

[0083] The present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the present invention. For example, the nose cap may have three or more mounting parts. In this case, the life of the nose cap is three times or more longer depending on the number of mounting parts. Also, the striking part 30 may be driven by compressed air supplied from an external device such as an air compressor, instead of the electric motor 44. [Explanation of symbols]

[0084] 1A... driving machine (work machine), 2... housing, 3... ejection unit, 4... magazine, 5... battery pack, 6... trigger lever, 10... impact mechanism housing, 11... motor housing, 12... handle, 13... connection unit, 20... ejection port, 21... ejection path, 22... plate guide, 23... guide plate, 24... detection unit (push lever), 25... contact unit, 30... impact unit, 31... plunger, 32... driver blade, 4 0...driving mechanism, 41...first gear, 42...second gear, 43...third gear, 44...electric motor, 45...reduction mechanism, 46...controller, 50...urging mechanism, 51...coil spring, 52...guide shaft, 60...counterweight, 61...latch, 70...contact device (nose cap), 71...mounting portion, 71a...mounting hole, 72...mounting portion, 72a...mounting hole, 73...contact portion, 74...contact portion, 75...connection portion, W...mating material

Claims

1. A contact tool that can be attached in two or more different attachment modes to an ejection section of a work machine including an ejection port through which a fastener is ejected, A first mounting portion that is mounted to the ejection portion in a first mounting state; A second mounting portion that is mounted to the ejection portion in a second mounting state; a first abutment portion that is located ahead of the injection port in the injection direction of the fastener when the first attachment portion is attached to the injection portion and abuts against a mating material into which the fastener is driven; a second abutment portion that is located ahead of the injection port in the injection direction of the fastener when the second attachment portion is attached to the injection portion and abuts against the mating material into which the fastener is driven, The first contact portion and the second contact portion are capable of contacting the opposing material in a similar contact state.

2. The first contact portion forms a flat end surface of the contact tool that contacts the counter material when in the first mounting state, The abutment according to claim 1 , wherein the second abutment portion forms another flat end surface of the abutment that abuts against the counter material when the abutment is in the second mounting state.

3. the first mounting portion is provided with a first mounting hole into which the injection portion is inserted in the first mounting state, The contact device according to claim 1 , wherein the second mounting portion is provided with a second mounting hole into which the ejection portion is inserted in the second mounting state.

4. The abutment according to claim 3 , wherein the first mounting hole and the second mounting hole extend in intersecting directions.

5. The abutment according to claim 3 , wherein the first mounting hole and the second mounting hole extend parallel to each other.

6. The abutment according to claim 3 , wherein one end of each of the first mounting hole and the second mounting hole is closed.

7. The contact device according to claim 1, wherein a distance along the injection direction from the injection outlet to the first abutment portion in the first mounting state is different from a distance along the injection direction from the injection outlet to the second abutment portion in the second mounting state.

8. an ejection section including an ejection port through which the fastener is ejected; A working machine including a contact tool that can be attached to the ejection section in two or more different attachment modes, The ejection unit further includes a detection unit movable relative to the ejection port, The abutment tool is A first mounting portion that is mounted to the ejection portion in a first mounting state; A second mounting portion that is mounted to the ejection portion in a second mounting state; a first abutment portion that is located ahead of the injection port in the injection direction of the fastener when the first attachment portion is attached to the injection portion and abuts against a mating material into which the fastener is driven; a second abutment portion that is located ahead of the injection port in the injection direction of the fastener when the second attachment portion is attached to the injection portion and abuts against the mating material into which the fastener is driven, The first contact portion and the second contact portion are capable of contacting the opposing material in a similar contact state.

9. the detection portion is located on one side of the injection port in a direction intersecting the injection direction of the fastener, and includes a contact portion that is brought into contact with the counter material, the first mounting portion is provided with a first mounting hole into which the contact portion is inserted in the first mounting mode; the second mounting portion is provided with a second mounting hole into which the contact portion is inserted in the second mounting state, When the contact portion is inserted into the first mounting hole of the first mounting portion, the second mounting portion including the second mounting hole is located on the one side of the outlet in the cross direction, The work machine according to claim 8 , wherein when the contact portion is inserted into the second mounting hole of the second mounting portion, the first mounting portion including the first mounting hole is located on the one side of the injection port in the cross direction.

10. A contact tool that can be attached in two or more different attachment modes to an ejection section of a work machine including an ejection port through which a fastener is ejected, a first mounting hole into which the injection portion is inserted in a first mounting state; a second mounting hole into which the injection portion is inserted in a second mounting state; The first mounting hole and the second mounting hole are independent of each other and do not communicate with each other.

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