Work equipment

Abstract

To improve workability of a work machine.SOLUTION: A driving machine 100 comprises: a coil spring 136 that generates energizing force; a plunger 126, which receives the energizing force generated by the coil spring 136 to move downward in a first direction P; and a drive blade 127 that moves downward in the first direction P together with the plunger 126. Further the driving machine 100 comprises: a housing part 111 having an opening portion on a front side in a second direction Q with respect to the plunger 126; and a cover part 135 covering the opening portion. The cover part 135 is detachably attached to the housing part 111. The driving machine 100 further has a plate 140, which is arranged between the plunger 126 and the drive blade 127 in the second direction Q, and covers at least portions of the plunger 126 and of the coil spring 136.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] 2. Description of the Related Art As an example of a working machine, a driving tool is known that has a movable part that is biased by a biasing part and a striking part that is provided on the movable part and strikes a fastener.

[0003] As an example of the above-mentioned driving machine, Patent Document 1 discloses a driving machine having a housing capable of accommodating the moving part and the striking part, and the housing can be separated into two parts, left and right. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-67925 Summary of the Invention [Problem to be solved by the invention]

[0005] In the driving tool described in Patent Document 1, when accessing the moving part for maintenance or the like, it is necessary to remove the screws securing the left and right housings and separate the housing into left and right halves to access the moving part. This method takes time to separate the housing and access the moving part. Therefore, there is a demand for a system that allows access to the moving part from outside the housing, improving the ease of maintenance, striking part replacement, etc.

[0006] However, if an opening is simply provided in the housing and the movable part is accessed from outside the housing through the opening, there is a risk that maintenance tools or the like may come into contact with the movable part, causing damage to the movable part, or that dust may enter, reducing durability.

[0007] An object of the present invention is to provide a work machine with improved workability.

[0008] Another object of the present invention is to provide a work machine with improved durability. [Means for solving the problem]

[0009] The working machine of the present invention includes a biasing portion that generates a biasing force on one side in a first direction, a movable portion that is disposed on one side of the biasing portion in the first direction and moves to one side in the first direction by receiving the biasing force of the biasing portion, a striking portion that is attached to the movable portion and strikes a stopper by moving to one side in the first direction together with the movable portion, a housing portion that houses the movable portion and has an opening on one side in a second direction perpendicular to the first direction with respect to the movable portion, a cover portion that is attached to the housing portion so as to be able to open and close the opening, and a protective portion that is disposed between the movable portion and the striking portion in the second direction and covers at least a portion of the movable portion and the biasing portion when viewed in the second direction. The protective portion is fixed to the housing in a state in which the movable portion and the striking portion are movable relative to the protective portion. . [Effects of the Invention]

[0010] According to the present invention, it is possible to improve the workability of a work machine and also improve the durability of the work machine. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a front view showing the structure of a working machine according to an embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view showing the structure cut along the line AA in FIG. [Figure 3] FIG. 2 is a cross-sectional view showing the structure cut along line BB in FIG. [Figure 4] 2 is a schematic diagram showing the positional relationship between a cover part, a striking part, a protective part, and a movable part in the work machine shown in FIG. 1. FIG. [Figure 5] 2 is a front view showing the structure of the work machine shown in FIG. 1 with a cover and a protective part removed. FIG. [Figure 6] FIG. 6 is a cross-sectional view showing the structure cut along the line AA in FIG. 5. [Figure 7] 2 is a front view showing the structure of the work machine shown in FIG. 1 with a cover removed. [Figure 8] FIG. 8 is a cross-sectional view showing the structure cut along the line AA in FIG. [Figure 9] 2 is a front view showing the structure of the working machine shown in FIG. 1 with the impact unit being removed. FIG. [Figure 10] FIG. 10 is a cross-sectional view showing the structure cut along the line AA in FIG. [Figure 11] 2 is a front view showing the structure of the work machine shown in FIG. 1 after a cover unit and a striking unit have been removed. [Figure 12] 12 is a cross-sectional view showing the structure cut along the line AA in FIG. 11. [Figure 13] 2A and 2B are diagrams showing the structure of a protection section provided in the work machine shown in FIG. 1, in which (a) is a front view and (b) is a cross-sectional view showing the structure cut along line CC. [Figure 14] 2 is a front view showing the structure of the working machine shown in FIG. 1 with a cover removed and a movable part disposed at a standby position. FIG. [Figure 15] FIG. 15 is a cross-sectional view showing the structure cut along the line AA in FIG. [Figure 16] 2 is a front view showing the structure of the working machine shown in FIG. 1 with a cover removed and a movable part positioned at the bottom dead center. FIG. [Figure 17] FIG. 17 is a cross-sectional view showing the structure cut along the line AA in FIG. [Figure 18] 2 is a front view showing the structure of the working machine shown in FIG. 1 with a cover removed and a movable part positioned at the top dead center. FIG. [Figure 19] FIG. 19 is a cross-sectional view showing the structure cut along the line AA in FIG. [Figure 20] 2A and 2B are diagrams showing the structure of the work machine shown in FIG. 1 with a cover removed, where (a) is a plan view and (b) is a front view. [Figure 21] FIG. 21 is a cross-sectional view showing the structure cut along the line AA in FIG. 20. [Figure 22] 20(b), where (a) is a cross-sectional view taken along line BB, and (b) is a cross-sectional view taken along line CC. [Figure 23] 20(b), where (a) is a cross-sectional view taken along line DD, and (b) is a cross-sectional view taken along line EE. FIG. [Figure 24] 22A and 22B are diagrams showing adjustment positions of the adjuster piece in the work machine shown in FIG. 21, where (a) is a partial cross-sectional view adjusted to the highest position, and (b) is a partial cross-sectional view adjusted to the lowest position. [Figure 25] 2 is a cross-sectional view showing a state in which a push lever of the work machine of FIG. 1 is in an initial position. [Figure 26] 2 is a cross-sectional view showing a state in which the push lever of the work machine of FIG. 1 is flush with the ejection part. [Figure 27] 2 is a cross-sectional view showing a state in which a push lever of the working machine of FIG. 1 is protruding from an ejection portion. [Figure 28] 1A and 1B are diagrams showing the structure of a work machine according to a first modified example of the present invention, in which (a) is a cross-sectional view with a cover portion closed, and (b) is a partial cross-sectional view with the cover portion open. [Figure 29] 10A and 10B are diagrams showing the structure of a working machine according to a second modified example of the present invention, in which (a) is a front view and (b) is a cross-sectional view taken along line BB in (a). DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings.

[0013] In this embodiment, a driving machine will be described as an example of a work machine. As shown in FIGS. 1 to 3, the driving machine 100 of this embodiment includes a housing 111, a striking element 112, a magazine 113, an electric motor 114, a transmission mechanism 115, a control unit 116, a battery pack 117, and a counterweight 118. The housing 111 includes a cylindrical body (mechanism support unit) 119, a handle 120 connected to the body 119, and a motor case 121 connected to the body 119. A mounting unit 122 is connected to the handle 120 and the motor case 121. A battery pack 117 is attached to the mounting unit 122. An ejection unit 123 having an ejection path 124 is provided at the tip of the body 119. That is, the ejection unit 123 is fixed to the body 119. This allows the operator to grip the handle portion 120 with his / her hand and press the tip of the injection portion 123 against the workpiece W1.

[0014] The motor case 121 is disposed between the handle portion 120 and the magazine 113 in the direction of the center line (axial center, rotation axis) E1. The magazine 113 is a portion that houses a plurality of fasteners 125. The fasteners 125 include nails and are rod-shaped. The magazine 113 has a feeder that sends the fasteners 125 housed in the magazine 113 to the ejection path 124.

[0015] The striker 112 is provided on both the inside and outside of the body 119. The striker 112 includes a plunger (movable part) 126 arranged inside the body 119, and a driver blade (striking part) 127 attached to the plunger 126. In other words, the plunger 126 and the driver blade 127 also constitute the striker 112. The driver blade 127 is a member that drives the fastener 125, and is made of metal. The plunger 126 to which the driver blade 127 is attached is made of metal or synthetic resin.

[0016] A guide shaft (adjustment connection portion) 128, which is a plunger support shaft, is provided within the body portion 119. A center line E1 passes through the center of the guide shaft 128 as a rotation axis. The guide shaft 128 is supported by an adjustment dial (adjustment operation portion) 129 and an adjuster piece (one-side restriction portion) 134. The adjuster piece 134 is fixed to a bottom holder 130 attached to the body portion 119. The adjustment dial 129 is a member that adjusts the stop position of the plunger 126, which is the movable portion, on the bottom dead center side in the first direction (vertical direction) P, and is provided at the upper end portion of the body portion 119.

[0017] As described above, the driving tool 100 includes the electric motor 114, the striker 112 that is driven by the driving force of the electric motor 114 and strikes the fastener 125 while reciprocating in the first direction P, and the housing 111 that supports the electric motor 114 and the striker 112. The first direction P includes a striking direction P1 in which the striker 112 strikes the fastener 125, and a return direction P2 that is the direction opposite to the striking direction P1.

[0018] Here, body 119 accommodates a coil spring (biasing portion) 136 that is expandable and contractible in a first direction P, and a plunger 126 that abuts against an end of coil spring 136 in striking direction P1 and is capable of striking stopper 125. Specifically, coil spring 136 is a member that generates a biasing force on one side (downward) in first direction P. Plunger 126 is a movable portion that is disposed on one side (downward) in first direction P with respect to coil spring 136 and moves to one side (downward) in first direction P upon receiving the biasing force of coil spring 136. Driver blade 127 is also attached to plunger 126 and is a striking portion that strikes stopper 125 by moving to one side (downward) in first direction P together with plunger 126.

[0019] The housing 111 accommodates the plunger 126 therein and includes a body 119 having an opening 139 on one side (front side) in the second direction (front-rear direction) Q relative to the plunger 126. The opening 139 of the body 119 is covered by a cover 135.

[0020] 1, the housing 111 is made up of a first housing 111a and a second housing 111b that are divided into left and right halves based on the center line E1 (see FIG. 2) of the body 119. In other words, the housing 111 that holds the power unit made up of the coil spring 136, counterweight 118, etc. has a two-piece structure that can be divided into the first housing 111a and the second housing 111b.

[0021] As described above, the plunger 126, the coil spring 136, the guide shaft 128, and the counterweight 118 that abuts against the end of the coil spring 136 in the return direction P2 are provided within the body 119 of the housing 111. Furthermore, the body 119 is provided with a transmission mechanism 115 that is driven by the driving force of the electric motor 114 to urge the plunger 126 toward the end of the coil spring 136 in the return direction P2 and to urge the counterweight 118 toward the end of the coil spring 136 in the impact direction P1, thereby compressing the coil spring 136. Here, the transmission mechanism 115 is, for example, a first gear 150, a second gear 151, and a third gear 152. Also provided within the body 119 are a weight bumper 137 against which the counterweight 118, released from the biasing force of the transmission mechanism 115, can come into contact, and a plunger bumper 138 against which the plunger 126 can come into contact.

[0022] The battery pack 117 in the driving machine 100 can be attached to and detached from the mounting portion 122. The battery pack 117 is a DC power source, and the power of the battery pack 117 can be supplied to the electric motor 114. In other words, the electric motor 114 is driven by the power of the battery pack 117. The mounting portion 122 also includes a control unit 116 for the driving machine 100.

[0023] The driving tool 100 is provided with a trigger 142 and a trigger switch 143 on the handle portion 120. When the operator applies an operating force to the trigger 142, the push lever 133 descends, and when the descended push lever 133 abuts against the workpiece W1, the trigger switch 143 turns on. When the operator releases the operating force applied to the trigger 142, the trigger switch 143 turns off.

[0024] The electric motor 114 has a rotor and a stator (not shown), and a motor shaft 146 is attached to the rotor. When power is supplied from a battery pack 117 to the electric motor 114, the motor shaft 146 rotates. A reducer (not shown) disposed in the motor case 121 has multiple sets of planetary gear mechanisms, an input element 148, and an output element 149. The input element 148 is connected to the motor shaft 146. The transmission mechanism 115 converts the rotational force of the output element 149 into an actuating force for the striker 112 and an actuating force for the counterweight portion 118.

[0025] When the operator presses the tip of the ejector 123 against the workpiece W1 and pulls the trigger 142, the push lever 133 descends. When the descended push lever 133 abuts against the workpiece W1, the trigger switch 143 turns on. When the control unit 116 detects that the trigger switch 143 is on, the control unit 116 supplies power to the electric motor 114, causing the motor shaft 146 to rotate forward. The rotational force of the motor shaft 146 is amplified by a reducer (not shown) and transmitted to the first gear 150. When the first gear 150 rotates, the second gear 151 also rotates, and then the third gear 152 also rotates. As a result, the striker 112 ascends, while the counterweight 118 descends. When the counterweight 118 reaches its bottom dead center, the plunger 126 ascends further and then reaches its top dead center. This maximizes the stored energy of the coil spring 136. After that, the coil spring 136 is released, and the plunger 126 descends due to the biasing force of the coil spring 136. When the plunger 126 begins to descend, the counterweight portion 118 begins to rise due to the biasing force of the coil spring 136.

[0026] When the plunger 126 descends, that is, when the striker 112 descends, the driver blade 127 strikes the stopper 125 located in the ejection path 124. As a result, the stopper 125 is driven into the workpiece W1.

[0027] Next, the cover 135 provided on the body 119 of the driving tool 100 will be described. The cover 135 is a resin member that covers the opening 139 of the body 119 and is attached to the housing 111 so that the opening 139 can be opened and closed. In this embodiment, the cover 135 is detachably attached to the body 119 of the housing 111. As shown in FIGS. 3 and 4, the driving tool 100 has a plate (protector) 140 that is disposed between the plunger 126 and the driver blade 127 in the second direction (front-rear direction) Q and that covers at least a portion of the plunger 126 and the coil spring 136 shown in FIG. 2 when viewed in the second direction. The second direction view is a view of the body 119 from one side (the front side) in the second direction Q. Here, FIGS. 5 and 6 are a front view and a cross-sectional view showing the structure shown in FIG. 4 with the cover 135 and the plate 140 removed. When the plate 140 is removed, it can be seen that the plunger 126 and the transmission mechanism 115 such as gears are disposed inside the body 119. In other words, the plate 140 protects the plunger 126, the coil spring 136, the transmission mechanism 115, and the like.

[0028] As described above, the trunk portion 119 of the housing portion 111 has an opening 139 formed on one side (front side) in the second direction Q with respect to the plunger 126. This opening 139 is used when replacing the driver blade 127 or performing maintenance, and the driver blade 127 is removed and attached or maintenance is performed via the opening 139. The cover portion 135 is fixed to the housing portion 111 with a fastener such as a screw.

[0029] Therefore, in the driving tool 100, by removing the fastener and detaching the cover portion 135 from the housing portion 111, the driver blade 127 can be replaced or maintained without disassembling the housing portion 111.

[0030] Furthermore, the driving tool 100 has a plate 140 disposed between the plunger 126 and the driver blade 127 in the second direction Q. The plate 140 is made of, for example, metal. As described above, the plate 140 covers at least a portion of the plunger 126 and the coil spring 136 when viewed in the second direction, and is disposed so that the plunger 126 and the coil spring 136 are not exposed through the opening 139 when the cover portion 135 is removed. In other words, the plate 140 has the function of protecting the plunger 126 and the coil spring 136 from contact with maintenance tools and the like when replacing the driver blade 127 or performing maintenance.

[0031] The plunger 126 has a pin-shaped protrusion 126a extending toward one side (forward) in the second direction Q. The driver blade 127 has an insertion hole 127a through which the protrusion 126a is inserted, and the plunger 126 and the driver blade 127 are engaged with each other by inserting the protrusion 126a into the insertion hole 127a. In other words, the driver blade 127 is engaged with the plunger 126 simply by inserting the protrusion 126a of the plunger 126 into the insertion hole 127a. Therefore, the driver blade 127 is movable relative to the plunger 126 toward one side (forward) in the second direction Q and can be removed from the plunger 126. Specifically, the engagement between plunger 126 and driver blade 127 can be released by sliding driver blade 127 to one side (forward) in second direction Q relative to protrusion 126a of plunger 126, and driver blade 127 can be pulled out upward at opening 139, as shown in Fig. 10. Protrusion 126a is an integral part of plunger 126 to ensure durability, but may be a separate part that is inserted into and attached to plunger 126 to make it easier to attach and detach driver blade 127.

[0032] To remove the driver blade 127, first, the second fastener 132 (screw) shown in FIG. 1 is loosened and removed, and the cover portion 135 is removed from the housing portion 111 as shown in FIG. 8. Then, the lever 141a of the ejector opening / closing mechanism 141 shown in FIG. 7 is tilted forward (the lever 141a is rotated). This disengages the hook 141b, and the ejector opening / closing mechanism 141 opens. FIGS. 7 and 8 show a state in which the lever 141a is returned to the rear side while the ejector opening / closing mechanism 141 remains open. When the ejector opening / closing mechanism 141 opens, the guide portion of the driver blade 127 becomes loose, allowing the driver blade 127 to move, as shown in FIG. 8. Then, the driver blade 127 is pulled upward in the opening 139 as shown in FIGS. 9 and 10, and then the driver blade 127 is completely pulled upward as shown in FIGS. 11 and 12. It should be noted that the ejection unit opening / closing mechanism 141 may be configured to be fixed using a fixing tool such as a screw, without providing the lever 141a.

[0033] Further, the protrusion 126a provided on the plunger 126 also serves as a connecting portion that connects the plunger 126 and the driver blade 127. As shown in FIG. 4, the plate 140 disposed between the plunger 126 and the driver blade 127 has an elongated hole (insertion hole) 140a through which the protrusion (connection portion) 126a of the plunger 126 is inserted in the second direction Q (see FIG. 2). As shown in FIG. 13, the plate 140 is a metal plate having a flat portion 140b, and is supported so that the flat portion 140b is perpendicular to the second direction Q. That is, the plate 140 is supported so that the elongated hole 140a is approximately parallel to the first direction P. This allows the plunger 126 and the driver blade 127 to move up and down along the first direction P within the range of the elongated hole 140a. As shown in FIGS. 3 and 7, the plate 140 is sandwiched between a plurality of protruding portions 119a provided on the body portion 119.

[0034] The cover portion 135 also prevents the driver blade 127, which can move up and down, from coming off the protruding portion 126a of the plunger 126. Specifically, the cover portion 135 is made of resin and includes a plate-shaped base portion 135a that intersects with the second direction Q as shown in FIG. 3, and a plurality of ribs 135b that extend from the base portion 135a toward the other side (rear side) in the second direction Q. The plurality of ribs 135b provided on the cover portion 135 are capable of contacting the driver blade 127. The plurality of ribs 135b are provided at positions that allow them to contact the large-diameter portion 127b of the driver blade 127 shown in FIG. 7. Specifically, when the driver blade 127 moves up and down during the driving operation, the plurality of ribs 135b do not come into contact with the driver blade 127. However, if driver blade 127 is thin, driver blade 127 may bend when striking stopper 125, and may attempt to come off protruding portion 126a. At this time, multiple ribs 135b come into contact with large diameter portion 127b of driver blade 127, preventing driver blade 127 from coming off protruding portion 126a. Because multiple ribs 135b come into contact with driver blade 127 only with large diameter portion 127b of driver blade 127, multiple ribs 135b do not interfere with the up and down movement of driver blade 127 due to the striking action.

[0035] 1 and 3, the driving tool 100 includes a housing portion 111 that includes a first housing 111a and a second housing 111b that are divided in a third direction (left-right direction) R that is perpendicular to the first direction P and the second direction Q. As shown in FIG. 1, the first housing 111a and the second housing 111b are fixed together by a first fastener 131 that is inserted through the housing portion 111. Meanwhile, the cover portion 135 is fixed to the first housing 111a and the second housing 111b by a second fastener 132 that is inserted through the housing portion 111. The first fastener 131 and the second fastener 132 are arranged along the third direction R. For example, the first fastener 131 and the second fastener 132 are screws. Therefore, the screw hole through which the first fixing device 131 is inserted to fix the first housing 111a and the second housing 111b, and the screw hole through which the second fixing device 132 is inserted to fix the cover portion 135 to the first housing 111a and the second housing 111b are holes drilled parallel to each other in the same direction (third direction R).

[0036] That is, because the screw holes for fastening the cover portion 135 are parallel to the screw holes for fastening the first housing 111a and the second housing 111b, the drawing direction of the screw holes for fastening the cover portion 135 in the molding die can be made the same as the drawing direction of the screw holes for fastening the first housing 111a and the second housing 111b. This allows resin molding of the housing portion 111 without providing an extra insert in the molding die when forming screw holes for fastening the cover portion 135 in the first housing 111a and the second housing 111b during resin molding of the housing portion 111. As a result, the cost required for resin molding of the housing portion 111 can be reduced.

[0037] Next, the state of the driving tool 100 (the position of the plunger 126) when replacing the driver blade 127 will be described. Figures 14 and 15 show the state in which the plunger 126 is positioned in the standby position, viewed with the cover part 135 removed. That is, after the fastener 125 has been driven in, the plunger 126 returns to the standby position and waits. It is preferable to remove the cover part 135 and replace the driver blade 127 in this state.

[0038] 16 and 17 show the plunger 126 at its bottom dead center when viewed with the cover 135 removed. The state in which the plunger 126 is at its bottom dead center is also called the maintenance mode, and the coil spring 136 is in an extended state. Even in this maintenance mode, the large diameter portion 127b of the driver blade 127 is positioned in the opening 139 of the body 119, so the driver blade 127 can be replaced.

[0039] 18 and 19 show the state in which plunger 126 is positioned at top dead center, viewed with cover portion 135 removed. Even when plunger 126 is positioned at top dead center, large diameter portion 127b of driver blade 127 is positioned at the upper end of opening 139 of body portion 119, so driver blade 127 can be replaced.

[0040] According to the driving tool 100 of this embodiment, a cover 135 covering the opening 139 of the barrel 119 is provided in a detachable manner. By removing the cover 135, movable parts such as the plunger 126 can be accessed from outside the housing 111 through the opening 139. Here, a plate 140 covering at least a portion of the plunger 126 and the coil spring 136 is provided between the plunger 126 and the driver blade 127. This prevents damage to the movable parts caused by contact with a maintenance tool or the like when accessing the movable parts from outside the housing 111 to perform maintenance, driver blade 127 replacement, or other such work. This improves the operability of the driving tool 100. Furthermore, the plate 140 provided between the plunger 126 and the driver blade 127 prevents dust from entering the movable parts when accessing the movable parts to perform maintenance, driver blade 127 replacement, or other such work. This improves the durability of the driving tool 100.

[0041] Next, the adjustment dial 129 provided in the driving tool 100 will be described in detail. As shown in FIGS. 20 and 21 , the adjustment dial 129 is a member that adjusts the stop position of the plunger 126, which is both a moving part and a striking part, on the bottom dead center side in the first direction (vertical direction) P. Adjusting the stop position of the plunger 126 on the bottom dead center side makes it possible to change the driving depth of the fastener 125. In other words, adjusting the stop position of the plunger 126 on the bottom dead center side changes the amount of descent of the driver blade 127. Specifically, the driving tool 100 is provided with an adjuster piece (one-side restriction portion) 134 that is disposed on one side (lower side) of the plunger 126 in the first direction P and restricts the amount of movement of the plunger 126 by abutting against the plunger 126, and an adjustment dial (adjustment operation portion) 129 that is operated by the operator to adjust the position of the adjuster piece 134 in the first direction P.

[0042] The driving tool 100 has a housing portion 111 that supports the coil spring 136, plunger 126, adjuster piece 134, etc., and the adjustment dial 129 is provided at the end of the housing portion 111 on the other side (upper side) in the first direction P. The housing portion 111 has a body portion (mechanism support portion) 119 that supports the coil spring 136, plunger 126, adjuster piece 134, etc., and a handle portion 120 that extends from the body portion 119 in a second direction (front-to-back direction) Q that intersects with the first direction P.

[0043] Also provided within the body 119 are a guide shaft (adjustment connection portion) 128 that connects the adjustment dial 129 and the adjuster piece 134, and a metal plate (other-side restriction portion) 144 that is connected to the guide shaft 128 so as to be immovable in the first direction P and that restricts upward movement of the upper end of the coil spring 136 in the first direction P. The guide shaft 128 is formed to extend along the first direction P and is a shaft that guides movement of the plunger 126 in the first direction P by abutting against the plunger 126. Also provided within the body 119 is a counterweight portion 118 that is disposed below the coil spring 136 in the first direction P and moves upward in the first direction P due to the biasing force of the coil spring 136. Here, the metal plate 144 is disposed above the counterweight portion 118 in the first direction P and restricts the amount of movement of the counterweight portion 118 by abutting against the counterweight portion 118. A plunger bumper 138 shown in FIG. 22(a) that receives an impact from the plunger 126 and a weight bumper 137 shown in FIG. 21 that receives an impact from the counterweight portion 118 are each supported by the guide shaft 128. Furthermore, a metal plate 144 is a member that receives an impact from the counterweight portion 118 via the weight bumper 137 and is supported at the upper end of the body portion 119. Specifically, as shown in FIG. 23(b), the metal plate 144 is supported by the first housing 111a and the second housing 111b. Here, as shown in FIGS. 22(b) and 23(a), the plunger 126 and the counterweight portion 118 are each guided and prevented from rotating by guide plates 147 on both left and right sides. As shown in FIG. 23(b), the metal plate 144 is also guided and prevented from rotating on both left and right sides by guide plates 147 on both left and right sides.

[0044] 21, the guide shaft 128 and the adjustment dial 129 are fixed by a pin 145. Meanwhile, as shown in FIG. 24, the adjuster piece 134 is threadedly coupled to the guide shaft 128 around a rotation axis (center line E1) along the first direction P. By operating the adjustment dial 129 shown in FIG. 21, the guide shaft 128 rotates around the rotation axis, causing the adjuster piece 134 to move in the first direction P (up and down). Specifically, the adjuster piece 134 is threadedly coupled to the guide shaft 128, non-rotatably engages with the bottom holder 130, and is provided so as to be movable relative to the guide shaft 128 in the first direction P. For example, by rotating the adjustment dial 129, the position of the adjuster piece 134 shown in FIG. 24(a) can be lowered to a length L1, resulting in the state shown in FIG. 24(b). This allows the driving depth of the fastener 125 to be changed.

[0045] In the driving tool 100 of this embodiment, the adjustment dial 129 is disposed on the other side (upper side) of the adjuster piece 134 in the first direction P. More specifically, the adjustment dial 129 is disposed in a position shifted upward from the adjuster piece 134 in the first direction P without overlapping with the adjuster piece 134. Furthermore, the adjustment dial 129 is disposed on the other side (upper side) in the first direction P from the movement range of the plunger 126 in the first direction P. In other words, the adjustment dial 129 is disposed above the stop position of the plunger 126 on the top dead center side. In other words, the adjustment dial 129 is disposed above the coil spring 136.

[0046] In this way, in the driving tool 100, the adjustment dial 129 is positioned above the adjuster piece 134, making it easier for the operator to grip the adjustment dial 129 when operating it, thereby improving the operability of the driving tool 100. Furthermore, because the adjustment dial 129 is provided at the upper end of the housing portion 111 in the first direction P, the handle portion 120, which is held by the operator, and the adjustment dial 129 are positioned close to each other, making it easier to operate the adjustment dial 129. As a result, the operability of the driving tool 100 can be improved.

[0047] Furthermore, since adjustment dial 129 is provided at the upper end of body 119 of housing 111, the dial diameter can be increased, making adjustment dial 129 easier to operate. As shown in Figure 20(a), knob 129a of adjustment dial 129 has a non-circular shape that makes it easy to grip and operate. Specifically, knob 129 is cross-shaped.

[0048] Additionally, the adjustment dial 129 is positioned above the adjuster piece 134. In other words, the adjustment dial 129 is provided on the opposite side of the injection unit 123. This allows the structure of the injection unit 123 to be made more compact, improving the corner driving performance of the driving tool 100 and improving visibility around the tip of the driving tool 100.

[0049] Furthermore, since the adjustment dial 129 is provided at the upper end of the body 119, adjustment can be easily performed regardless of the operator's dominant hand.

[0050] Next, the push lever 133 provided in the driving machine 100 will be described with reference to Figures 25 to 27. In the driving machine 100, as shown in Figure 25, the push lever 133 is connected to a link mechanism 153 of the trigger 142 via a relay lever 154. Figure 25 shows the push lever 133 in its initial position. That is, when the push lever 133 is in its initial position, it is retracted from the tip of the injection part. When the trigger 142 is turned on in this state, the push lever 133 begins to descend, and as shown in Figure 26, when the push lever 133 comes into contact with the workpiece W1 and cannot descend any further (the push lever 133 is flush with the tip of the injection part 123), the fastener 125 is ejected. On the other hand, when the push lever 133 does not come into contact with the workpiece W1 and protrudes from the tip N1 of the injection section as shown in Figure 27, the driving tool 100 determines that there is no workpiece W1 present and turns off.

[0051] Therefore, in the driving machine 100 of this embodiment, compared to a work machine in which the push lever 133 is brought into contact with the workpiece W1 and pushed in to turn it on, the tip of the ejection part 123 does not move between the time the tip of the ejection part 123 is brought into contact with the workpiece W1 and the time the driving is performed, so the driving location can be accurately targeted.

[0052] Furthermore, since the push lever 133 is positioned at a position retracted from the tip of the ejection part 123 in the initial position, driving can be performed even with the tip of the ejection part 123 inserted into a small hole or the like in the workpiece W1. Also, even if there is a step in the part of the workpiece W1 to be driven, driving can be performed with the push lever 133 clear of the step.

[0053] Next, modifications of this embodiment will be described. In the driving tool 100 of the first modification shown in Fig. 28, the cover portion 135 is connected to the hinge portion 155 and rotated to open. That is, as shown in Fig. 28(a), the cover portion 135 is connected to the rotatable hinge portion 155, and when replacing the driver blade 127 or performing maintenance, the cover portion 135 is rotated at the hinge portion 155 to open the body portion 119, as shown in Fig. 28(b), and replacement or maintenance of the driver blade 127 is performed in this state.

[0054] By configuring the cover portion 135 to be opened and closed by rotating the hinge portion 155, the number of fasteners such as screws can be reduced, thereby reducing the number of parts of the driving tool 100 and reducing costs.

[0055] Furthermore, the driving tool 100 of a second modified example shown in FIG. 29 employs an integrated plate 156 molded integrally with the housing 111 as a protective part that protects the moving parts, such as the plunger 126. Only the portion T1 (hatched portion) in FIG. 29(a) is an opening, and its periphery is covered by the integrated plate 156 molded integrally with the housing 111, as shown in FIG. 29(b). In other words, as shown in FIG. 29(a), the opening 139 is substantially covered by the integrated plate 156, and the moving parts, such as the plunger 126 shown in FIG. 29(b), are protected by the integrated plate 156. By employing the integrated plate 156 as a protective part in this way, the number of parts of the driving tool 100 can be reduced.

[0056] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, in the above-described embodiment, an elastic member such as an elastomer may be provided on the outer periphery of cover portion 135, thereby preventing cover portion 135 from damaging the mating member. [Explanation of symbols]

[0057] 100... driving machine (work machine), 111... housing part, 111a... first housing, 111b... second housing, 112... striking element, 113... magazine, 114... electric motor, 115... transmission mechanism, 116... control part, 117... battery pack, 118... counterweight part, 119... body part (mechanism part support part), 119a... extension part, 120... handle part, 121... motor case, 122... mounting part, 123... ejection part, 124... ejection part Outlet path, 125...stopper, 126...plunger (movable part), 126a...projection part (connecting part), 127...driver blade (striking part), 127a...insertion hole, 127b...large diameter part, 128...guide shaft (adjustment connection part), 129...adjustment dial (adjustment operation part), 129a...knob part, 130...bottom holder, 131...first fixing device, 132...second fixing device, 133...push lever, 134...adjuster piece (one-side restricting part) , 135...cover portion, 135a...base portion, 135b...rib, 136...coil spring (biasing portion), 137...weight bumper, 138...plunger bumper, 139...opening, 140...plate (protective portion), 140a...long hole (insertion hole), 140b...flat portion, 141...injection portion opening / closing mechanism, 141a...lever, 141b...hook, 142...trigger, 143...trigger switch, 144...metal plate (other side regulating portion), 145... Pin, 146...motor shaft, 147...guide plate, 148...input element, 149...output element, 150...first gear, 151...second gear, 152...third gear, 153...link mechanism, 154...relay lever, 155...hinge portion, 156...integrated plate (protective portion), E1...center line (rotation axis), L1...length, N1...tip of injection portion, P...first direction, P1...impact direction, P2...return direction, Q...second direction, R...third direction, W1...workpiece to be driven

Claims

1. a biasing portion that generates a biasing force on one side in a first direction; a movable portion that is disposed on one side of the biasing portion in the first direction and moves to one side in the first direction by receiving the biasing force of the biasing portion; a striking portion attached to the movable portion and moving together with the movable portion toward one side in the first direction to strike the stopper; a housing portion that accommodates the movable portion therein and has an opening on one side of the movable portion in a second direction perpendicular to the first direction; a cover attached to the housing so as to be able to open and close the opening; a protective portion that is disposed between the movable portion and the striking portion in the second direction and that covers at least a portion of the movable portion and the biasing portion when viewed in the second direction, The protective part is fixed to the housing in a state in which the movable part and the striking part are movable relative to the protective part.

2. A biasing portion that generates a biasing force on one side in a first direction; a movable portion that is disposed on one side of the biasing portion in the first direction and moves to one side in the first direction by receiving the biasing force of the biasing portion; a striking portion attached to the movable portion and moving together with the movable portion toward one side in the first direction to strike the stopper; a housing portion that accommodates the movable portion therein and has an opening on one side of the movable portion in a second direction perpendicular to the first direction; a cover attached to the housing so as to be able to open and close the opening; a protective portion that is disposed between the movable portion and the striking portion in the second direction and that covers at least a portion of the movable portion and the biasing portion when viewed in the second direction, the striking portion is movable relative to the movable portion toward one side in the second direction and is detachable from the movable portion; the cover portion prevents the striking portion from coming off the movable portion; the movable portion has a protruding portion extending to one side in the second direction, The impact portion has an insertion hole through which the protrusion is inserted.

3. the cover portion is made of resin and includes a plate-shaped base portion that intersects with the second direction, and a rib that stands from the base portion toward the other side in the second direction, The work machine according to claim 1 or 2, wherein the rib is capable of coming into contact with the striking portion.

4. the housing portion includes a first housing and a second housing that are divided in a third direction perpendicular to the first direction and the second direction, the first housing and the second housing are fixed together by a first fastener that is inserted through the housing portion; the cover portion is fixed to the first housing and the second housing by a second fastener that is inserted through the housing portion; The work machine according to claim 1 , wherein the first fixture and the second fixture are arranged to extend along the third direction.

5. a connecting portion that connects the movable portion and the striking portion, The work machine according to claim 1 , wherein the protection portion has an insertion hole through which the connecting portion is inserted in the second direction.

6. The work machine according to claim 1 , wherein the protection portion is a metal plate, and the metal plate is supported so as to be perpendicular to the second direction.

7. A work machine as described in claim 1, wherein the protective part has an end on one side in the first direction that is located on one side of the opening in the first direction, and an end on the other side in the first direction that is located on the other side of the opening in the first direction.

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