JP2023034618A - Working machine - Google Patents

Abstract

To improve the reliability and workability of a working machine.SOLUTION: A nailing machine (working machine) 1 has a housing 10 and a striking portion 30 that vertically operates to strike a stopper. The housing 10 has a body housing 11 that supports the striking portion 30, a handle 12 that extends in a fore-and-aft direction B1, and a motor storing portion 13 that supports an electric motor 16. The handle 12 can relatively move in a vertical direction C1 with respect to the body housing 11. The nailing machine 1 has an elastic body 50 that is disposed between the body housing 11 and the handle 12 in the fore-and-aft direction B1, is fitted with the body housing 11 and the handle 12, and is sheared and deformed when the handle 12 relatively moves in the vertical direction C1 with respect to the body housing 11.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a nail gun having a housing capable of supporting a striking part and a handle.

BACKGROUND ART As an example of a nailer (work machine), there is known a nailer that includes a housing that can support a striking part that strikes a fastener, and a handle that is gripped by a worker. Further, as an example of such a nailer, the housing includes a tubular main body, a handle connected to the tubular main body, and a motor case connected to the tubular main body. is described in Patent Document 1.

Japanese Patent Application Laid-Open No. 2021-3777

In the configuration of the nailing machine described in Patent Document 1, the vibration of the striking part is applied to the tubular main body, and the shock applied to the tubular main body is directly transmitted to the handle, resulting in poor workability. Therefore, it is conceivable to connect the cylindrical main body capable of supporting the striking part and the handle via an elastic body, but in a structure in which the elastic body is sandwiched in the striking direction, the elastic body does not sufficiently absorb the impact. Moreover, there was a possibility that the reliability of the nailing machine would be impaired.

SUMMARY OF THE INVENTION An object of the present invention is to provide a working machine with improved reliability and workability.

A working machine according to one embodiment is a working machine having a housing and a striking part that moves vertically to strike a fastener, wherein the housing includes a first portion that supports the striking part; a second portion having a handle portion extending in the front-rear direction, wherein the second portion is vertically movable relative to the first portion, and the first portion and the second portion in the front-rear direction; and an elastic body fitted to the first part and the second part, the elastic body being sheared when the second part moves vertically relative to the first part transform.

According to the present invention, it is possible to improve the reliability and workability of the work machine.

It is an explanatory view showing the internal structure of the nailing machine (work machine) of the embodiment of the present invention. It is explanatory drawing which shows the structure which loaded the nailer shown in FIG. 1 with the fastener. It is a figure which shows the structure of the elastic body provided in the nailing machine shown in FIG. 1, (a) is the perspective view seen from the back, (b) is the perspective view seen from the front. 4 is a perspective view showing the structure of a fitting surface to be fitted with the elastic body shown in FIG. 3, (a) is a front view of the fitting surface of the handle, and (b) is a fitting surface of the main body housing. It is the figure which looked at from the back. FIG. 2 is a partially enlarged view showing the structure of the fitting portion of the elastic body in the nailing machine shown in FIG. 1; FIG. 6 is a partial cross-sectional view showing the structure taken along line AA shown in FIG. 5; 6A is a partial cross-sectional view showing the structure cut along line BB shown in FIG. 5, and FIG. 6B is a partial cross-sectional view showing the structure cut along line CC shown in FIG. 6A is a partial cross-sectional view showing the structure cut along line DD shown in FIG. 5, and FIG. 6B is a partial cross-sectional view showing the structure cut along line EE shown in FIG. It is explanatory drawing which shows the internal structure of the nailing machine of the 1st modification of this invention. It is explanatory drawing which shows the internal structure of the nailing machine of the 2nd modification of this invention. 11 is a partial cross-sectional view showing the structure taken along line FF shown in FIG. 10; FIG.

A nail driver of this embodiment will be described with reference to the drawings.

A nailing machine (working machine) 1 of the present embodiment shown in FIG. 1 is suitable for driving fasteners 6 such as nails and staples (see FIG. 2) into mating materials such as plate materials and gypsum boards.

The nailer 1 has a housing 10 and a magazine section 20 . The housing 10 includes a body housing (first portion) 11 , a handle (second portion) 12 , a motor housing portion (third portion) 13 and a connecting portion 14 . The motor housing portion 13 is also called a motor case. One longitudinal end of the handle 12 and the motor accommodating portion 13 is connected to the body housing 11 , and the other longitudinal end of the handle 12 and the motor accommodating portion 13 is connected to the connecting portion 14 . That is, the body housing 11, the handle 12, the motor accommodating portion 13 and the connecting portion 14 are integrated. The housing 10 is made of synthetic resin such as nylon or polycarbonate. Therefore, the body housing 11, the handle 12, the motor accommodating portion 13, and the connecting portion 14, which constitute the housing 10, are integrally formed by resin molding. The main body housing 11 has a generally rectangular cylindrical shape as a whole.

Here, the longitudinal direction of the body housing 11 shown in FIG. 1 is defined as the "vertical direction C1", and the longitudinal direction of the handle 12 and the motor accommodating portion 13 is defined as the "front-back direction B1". A direction orthogonal to the up-down direction C1 and the front-rear direction B1 is defined as a "left-right direction E1" shown in FIG. However, this definition is only for convenience of explanation.

According to the above definition, the handle 12 is located above the motor housing portion 13 and extends rearward from one side (rear side/rear side) of the body housing 11 . In other words, the handle 12 has a handle portion 12m extending in the front-rear direction B1. On the other hand, the motor accommodating portion 13 is positioned below the handle 12 and extends rearward from one side (rear side/rear side) of the body housing 11 . Also, the connecting portion 14 connects the rear portion 12 k of the handle 12 and the rear portion 13 d of the motor housing portion 13 . That is, the front-rear direction in this embodiment corresponds to the extending direction of the handle 12 in the present invention.

The nailing machine 1 also has a striking part 30 . The striking part 30 is supported by the body housing 11 and has a plunger 31 arranged inside the body housing 11 and a driver blade 32 fixed to the plunger 31 . Driver blade 32 is made of metal. A guide shaft 33 is fixed inside the body housing 11 . A centerline A1 is the center of the guide shaft 33 . The plunger 31 is attached to the guide shaft 33, and the striking part 30 is movable in the direction along the center line A1.

Further, an injection part 7 is attached to the body housing 11 so as to be exposed to the outside of the body housing 11 . The injection section 7 can be defined as a nose section. The hitting part 30 moves in the vertical direction C<b>1 and hits the stopper 6 sent to the injection part 7 . The injection section 7 has a blade guide 5 and a guide plate 38 . The blade guide 5 may be made of either metal or synthetic resin. The injection section 7 is provided with an injection path 2 formed by the blade guide 5 . The exit path 2 may be any of grooves, passages, holes, gaps, and spaces. A driver blade 32 is movable within the injection path 2 .

A push lever 8 is attached near the tip of the injection section 7 . The push lever 8 can move and stop with respect to the ejection section 7 . Further, the push lever 8 can come into contact with and separate from the mating member. In addition, the injection part 7 prevents the driver blade 32 from moving in the direction crossing the center line A1 by coming into contact with the driver blade 32 .

Also, the weight 34 suppresses the recoil received by the housing 10 . The weight 34 is made of metal as an example. The weight 34 is attached to the guide shaft 33 and is movable in the direction along the center line A1.

A metal spring 35 is arranged inside the body housing 11, and the spring 35 is arranged between the plunger 31 and the weight 34 in a direction along the center line A1. The plunger 31 receives from the spring 35 a downward urging force D1 approaching the injection part 7 in a direction along the center line A1. The weight 34 receives from the spring 35 a biasing force upward D2 away from the injection section 7 in the direction along the center line A1. A weight bumper 36 and a plunger bumper 37 are provided inside the body housing 11 . Both the weight bumper 36 and the plunger bumper 37 are made of synthetic rubber.

Also, a battery pack 19 that is a power supply unit is detachably attached to the connection unit 14 . When voltage is applied from the battery pack 19 to the electric motor 16 and the motor shaft 17 rotates forward, the rotational force of the motor shaft 17 is transmitted to the first gear 42 . The rotational force of the first gear 42 is transmitted to the third gear 44 via the second gear 43 .

A control unit 15 is provided in the connecting unit 14 . The control unit 15 is a microcomputer having an input port, an output port, an arithmetic processing unit, and a storage unit. Further, the handle 12 is provided with a trigger 4 and a trigger switch 41, and when the operator applies an operating force to the trigger 4, the trigger switch 41 is turned on. When the operator releases the operating force applied to the trigger 4, the trigger switch 41 is turned off.

A holder portion 24 and a magazine portion 20 are provided on the side of the motor housing portion 13 opposite to the handle 12 . The magazine section 20 includes a plate-like base member 20a capable of accommodating a plurality of fasteners 6 (see FIG. 2) to be hit by the hitting section 30. As shown in FIG. Further, the magazine section 20 includes a feeder section 20b that feeds the contained fasteners 6 to the ejection path 2 one by one. The stopper 6 fed to the injection path 2 of the injection section 7 by the feeder section 20b is struck by the striking section 30 moving downward D1 shown in FIG. Then, it is injected from an injection port 3, which is the exit of the injection path 2, and is driven into the mating material. More specifically, the head of the fastener 6 fed from the base member 20a of the magazine section 20 to the ejection path 2 by the feeder section 20b is hit by the driver blade 32 moving downward D1.

Further, the nailing machine 1 has a detection section 21 that detects the position of the feeder section 20b in the front-rear direction B1. Further, the magazine section 20 has a handle arm 27 arranged on the other side of the holder section 24 in the front-rear direction B1 (the rear side away from the injection section 7). The handle arm 27 is attached to the housing 10 and the base member 20a.

When the operator applies an operating force to the trigger 4, the trigger switch 41 is turned on, and when the push lever 8 is pressed against the mating member, the push lever switch 9 is turned on. Then, the control unit 15 applies voltage to the electric motor 16 to rotate the motor shaft 17 . The rotational force of the motor shaft 17 is amplified by the speed reducer 18 and transmitted to the first gear 42, causing the first gear 42, the second gear 43 and the third gear 44 to rotate. By engaging at least one of the cam roller of the first gear 42 and the cam roller of the second gear 43, the striking portion 30 rises from the standby position. Further, the engagement of the cam roller of the third gear 44 causes the weight 34 to descend.

Next, when the cam rollers of the first gear 42 and the cam rollers of the second gear 43 are both disengaged, the striking portion 30 descends due to the biasing force of the spring 35 . Further, when the engagement of the cam roller of the third gear 44 is released, the weight 34 is lifted by the biasing force of the spring 35 . The driver blade 32 strikes one fastener 6 that has reached the injection path 2 from the base member 20a of the magazine section 20, and the fastener 6 is driven into the mating member.

After the driver blade 32 hits the stopper 6 , the plunger 31 collides with the plunger bumper 37 . Plunger bumper 37 absorbs a portion of the kinetic energy of striking portion 30 . Also, the weight 34 collides with the weight bumper 36 . Weight bumper 36 absorbs a portion of the kinetic energy of weight 34 . Thus, when the hitting part 30 moves downward D1 and hits the stopper 6 , the weight 34 can reduce the recoil when the hitting part 30 hits the stopper 6 .

In addition, the control unit 15 continues to rotate the electric motor 16 even after the operator releases the push lever 8 from the mating member and the trigger switch 41 is turned off after the fastener 6 is driven into the mating member. there is Then, the striking part 30 rises from the bottom dead center against the biasing force of the spring 35 , and the plunger 31 is separated from the plunger bumper 37 . The control unit 15 stops the electric motor 16 when detecting that the striking unit 30 has reached the standby position.

Next, a connection structure between the body housing 11 and the handle 12 in the nailing machine 1 will be described. In the nailing machine 1, the handle 12 is movable relative to the body housing 11 in the vertical direction C1. Specifically, the front portion 12h of the handle 12 and the upper portion 11j of the body housing 11 are not directly connected. Here, the structure of the housing 10 will be described in detail. A body housing 11 constituting the housing 10 has a shape extending in the vertical direction C1. The handle 12 has a shape extending in the front-rear direction B1. Below the handle 12, a motor accommodating portion 13 is also arranged extending in the front-rear direction B1. In the nailing machine 1, the upper portion 11j of the body housing 11 is a portion of the body housing 11 near where the third gear 44 is arranged, while the bottom portion 11p of the body housing 11 is a portion of the body housing 11 that is the first gear. This is a location near where the gear 42 is arranged. The front portion 12h of the handle 12 is a portion of the handle 12 near where the trigger 4 is arranged, while the rear portion 12k of the handle 12 is a portion of the handle 12 near where a portion of the control portion 15 is arranged. is. Furthermore, the front portion 13c of the motor housing portion 13 is a portion of the motor housing portion 13 near where a part of the speed reducer 18 is arranged, while the rear portion 13d of the motor housing portion 13 is a portion of the motor housing portion 13 that is electrically driven. It is a location near where a part of the motor 16 is arranged.

The motor accommodating portion 13 has a front portion 13c connected to the lower portion 11p of the body housing 11 and a rear portion 13d bent upward and connected to the rear portion 12k of the handle 12 via the connecting portion 14 . That is, the housing 10 has a shape in which the main body housing 11 is connected to the motor accommodating portion 13 , and the motor accommodating portion 13 is connected to the handle 12 via the connecting portion 14 . Therefore, the body housing 11, the motor accommodating portion 13, the connecting portion 14 and the handle 12 are integrated. However, as described above, the front portion 12h of the handle 12 and the upper portion 11j of the body housing 11 are not directly connected. With such a structure, the body housing 11 moves relative to the handle 12 in the up-down direction C1 due to the vibration caused by driving the nailer 1 .

Therefore, in the nailing machine 1 of this embodiment, the front portion 12h of the handle 12 is connected to the upper portion 11j of the body housing 11 via the elastic body 50. As shown in FIG. That is, in the nailing machine 1, the elastic body 50 is arranged between the body housing 11 and the handle 12 in the front-rear direction B1. In other words, the elastic body 50 is sandwiched between the body housing 11 and the handle 12 in the front-rear direction B1, and the body housing 11 and the handle 12 are connected via the elastic body 50 in the front-rear direction B1. Accordingly, in the nailing machine 1, when the handle 12 moves relative to the body housing 11 in the vertical direction C1, the elastic body 50 undergoes shear deformation. More specifically, when the body housing 11 vibrates in the vertical direction C1 due to hammering, the elastic body 50 is not crushed in the sandwiched direction (the front-rear direction B1), but is elastic against the force applied in the shearing direction. exert power. Therefore, the elastic body 50 has a shape in which the front portion of the elastic body 50 is fitted with the body housing 11 and the rear portion of the elastic body 50 is fitted with the handle 12 . The elastic body 50 is, for example, a plate-like member made of rubber.

Here, the nailing machine 1 is provided with a switch 22 on the upper portion 11j of the body housing 11. As shown in FIG. The switch 22 is a detection unit that detects the position of the weight 34 , and the wiring 23 is electrically connected to the switch 22 . The wiring 23 is electrically connected to a wiring board of the control section 15 arranged at the rear portion 12k of the handle 12. As shown in FIG. That is, the nailer 1 has a wiring 23 extending from inside the body housing 11 to inside the handle 12 . At this time, if the front portion 12h of the handle 12 and the upper portion 11j of the body housing 11 are not connected, the wiring 23 cannot be passed. Therefore, in the nailing machine 1 of this embodiment, the elastic body 50 is interposed between the front portion 12h of the handle 12 and the upper portion 11j of the main body housing 11, and a through hole 50j (see FIG. 3), the wiring 23 can be routed from the inside of the body housing 11 to the inside of the handle 12. As shown in FIG.

Next, the shape of the elastic body 50, the fitting structure between the elastic body 50 and the body housing 11, and the fitting structure between the elastic body 50 and the handle 12 will be described with reference to FIGS. The elastic body 50 has a plate shape elongated in the vertical direction C1. As shown in FIG. 3(a), the connection surface of the elastic body 50 with the handle 12 is provided with a concave stepped portion 50q recessed from the connection surface. A through hole 50j through which the wiring 23 can be inserted, a groove 50r extending in the left-right direction E1, a protrusion (fitting portion) 50h, and an elongated through hole 50k for escaping are provided in this recessed stepped portion 50q from above. It is On the other hand, as shown in FIG. 3B, the connecting surface of the elastic body 50 with the main body housing 11 is provided with a convex stepped portion 50p, a convex stepped portion 50n, and a convex stepped portion 50m. A projection (fitting portion) 50e is provided on the projection stepped portion 50p, and a through hole 50j, a projection (fitting portion) 50f, a through hole 50k and a projection are provided on the projection stepped portion 50m. A portion (fitting portion) 50g is provided.

Further, as shown in FIG. 4( a ), the connecting surface of the handle 12 with the elastic body 50 is provided with a convex stepped portion 12 i that fits into the concave stepped portion 50 q of the elastic body 50 . A through hole 12g, a protrusion 12j, and a recess (fitting portion) 12e are provided in the stepped portion 12i. The wiring 23 is inserted through the through hole 12g. Moreover, the protrusion 12 j fits into the groove 50 r of the elastic body 50 , and the recess 12 e fits into the protrusion 50 h of the elastic body 50 . Further, the convex stepped portion 12p of the handle 12 is fitted with the stepped portion 50s of the elastic body 50. As shown in FIG. The projection 12j of the handle 12 fits into the groove 50r of the elastic body 50, the recess 12e of the handle 12 fits into the projection 50h of the elastic body 50, and the projection step 12p of the handle 12 fits into the elastic body 50. By fitting with the stepped portion 50s of , it is possible to position the handle 12 and the elastic body 50, and to prevent the handle 12 and the elastic body 50 from being displaced and the elastic body 50 from coming off.

On the other hand, as shown in FIG. 4(b), the connecting surface of the body housing 11 to the elastic body 50 has a concave portion (fitting portion) 11e, a through hole 11i, a concave portion (fitting portion) 11f and a concave portion (fitting portion). joint) 11g is provided. A wiring 23 is inserted through the through hole 11i. The recess 11e fits with the projection 50e of the elastic body 50, the recess 11f fits with the projection 50f of the elastic body 50, and the recess 11g fits with the projection 50g of the elastic body 50. do. Further, the concave stepped portion 11k of the main body housing 11 is fitted with the convex stepped portion 50m of the elastic body 50, the concave stepped portion 11m of the main body housing 11 is fitted with the convex stepped portion 50n of the elastic body 50, Further, the concave stepped portion 11n of the body housing 11 is fitted with the convex stepped portion 50p of the elastic body 50 . That is, the recesses 11e, 11f, and 11g of the main body housing 11 are fitted to the projections 50e, 50f, and 50g of the elastic body 50, respectively, and furthermore, the recessed stepped portion 11k and the recessed stepped portion of the main body housing 11 are fitted. The portion 11m and the recessed stepped portion 11n are fitted to the projected stepped portion 50m, the projected stepped portion 50n, and the projected stepped portion 50p of the elastic body 50, respectively. As a result, the body housing 11 and the elastic body 50 can be positioned, and the positional deviation between the body housing 11 and the elastic body 50 and the falling off of the elastic body 50 can be prevented.

Next, the split structure of the body housing 11, the handle 12 and the elastic body 50 will be described. The body housing 11, the handle 12, the motor accommodating portion 13, the connecting portion 14, and the elastic body 50 have a split structure that can be split in the left-right direction E1. Specifically, as shown in FIG. 4B, the body housing 11 includes a left body housing (left first member) 11a and a right body housing (right first member) assembled to the left body housing 11a. 11b and . The left body housing 11a and the right body housing 11b can be separated at a dividing line 11h. On the other hand, as shown in FIG. 4(a), the handle 12 includes a left handle (second left member) 12a and a right handle (second right member) 12b assembled to the left handle 12a. . The left handle 12a and the right handle 12b can be separated by a parting line 12f. The motor housing portion 13 includes a left motor housing portion 13a and a right motor housing portion (not shown) assembled to the left motor housing portion 13a. The left motor housing portion 13a and the right motor housing portion can be separated by a dividing line. Further, the connecting portion 14 includes a left connecting portion 14a and a right connecting portion (not shown) assembled to the left connecting portion 14a. The left connecting portion 14a and the right connecting portion can be separated by a dividing line. The left body housing 11a, left handle 12a, left motor housing 13a and left coupling 14a are integral parts. Similarly, the right body housing 11b, right handle 12b, right motor housing and right coupling are integral parts. As shown in FIGS. 3A and 3B, the elastic body 50 includes a left elastic body 50a and a right elastic body 50b attached to the left elastic body 50a. The left elastic body 50a and the right elastic body 50b can be separated by a dividing line 50i. The parting line 11h of the body housing 11, the parting line 12f of the handle 12, the parting line of the motor accommodating portion 13, the parting line of the connecting portion 14, and the parting line 50i of the elastic body 50 are located on the same plane.

The left elastic body 50a can be fitted with the left body housing 11a separated from the right body housing 11b, and can be fitted with the left handle 12a separated from the right handle 12b. Similarly, the right elastic body 50b can be fitted with the right body housing 11b separated from the left body housing 11a, and can be fitted with the right handle 12b separated from the left handle 12a. That is, the left elastic body 50a can be fitted to the left body housing 11a and the left handle 12a which are split into two. Similarly, the right elastic body 50b can be fitted to the split right body housing 11b and right handle 12b.

Further, as shown in FIGS. 5 and 6 to 8, the left body housing 11a has a left body housing fitting portion (left first member fitting portion) 11c. The left elastic body 50a slides rightward in the left-right direction E1 from the outside of the left main body housing 11a toward the left main body housing fitting portion 11c, whereby the left elastic body 50a engages with the left main body housing fitting portion 11c. It has a body first fitting portion 50c. That is, when fitting the left elastic body 50a between the left handle 12a and the left main body housing 11a, the left elastic body 50a is slid from the outside of the left main body housing 11a to the right in the left-right direction E1, and the left handle 12a is moved. and the left main body housing 11a. As a result, the left elastic body first fitting portion 50c of the left elastic body 50a and the left body housing fitting portion 11c of the left body housing 11a can be fitted together.

In addition, the left body housing 11a prevents the left elastic body first fitting portion 50c of the left elastic body 50a from sliding leftward in the left-right direction E1 from the left body housing fitting portion 11c. It has a restricting portion (first left member restricting portion) 11d. That is, the left body housing 11a has a left body housing restricting portion 11d that restricts the left elastic body 50a from sliding leftward in the left-right direction E1 and leaving the left body housing 11a. 6 is parallel to the front-rear direction B1, and the angle θ between the V surface and the W surface is 0°<θ<90°. . Since the left body housing 11a has the left body housing restricting portion 11d, it is possible to prevent the left elastic body 50a from sliding leftward in the horizontal direction E1 and leaving the left body housing 11a. The fact that the left body housing 11a has the left body housing restricting portion 11d is the same in the cross-sectional structures of FIGS. 7(a), (b) and 8(a). In addition, in the cross-sectional structure of FIG. 8B, the left main body housing 11a has a recessed stepped portion 11m instead of the left main body housing restricting portion 11d. It is possible to prevent the elastic body 50a from sliding leftward in the left-right direction E1 and leaving the left main body housing 11a.

Next, the fitting structure of the left handle 12a will be described. As shown in FIGS. 5 and 6 to 8, the left handle 12a has a left handle fitting portion (left second member fitting portion) 12c. The left elastic body 50a slides rightward in the left-right direction E1 from the outside of the left handle 12a toward the left handle fitting portion 12c, whereby the left elastic second elastic body 50a engages with the left handle fitting portion 12c. It has a fitting portion 50d. That is, when fitting the left elastic body 50a between the left handle 12a and the left main body housing 11a, the left elastic body 50a is slid from the outside of the left handle 12a to the right in the left-right direction E1, and the left handle 12a is fitted. It is arranged between the left main body housing 11a. Thereby, the left elastic body second fitting portion 50d of the left elastic body 50a and the left handle fitting portion 12c of the left handle 12a can be fitted together.

The left handle 12a also has a left handle restricting portion (see FIG. 1) that restricts the left elastic body second fitting portion 50d of the left elastic body 50a from sliding leftward in the left-right direction E1 from the left handle fitting portion 12c. left second member restricting portion) 12d. That is, the left handle 12a has a left handle restricting portion 12d that restricts the left elastic body 50a from sliding leftward in the left-right direction E1 and leaving the left handle 12a. Since the left handle 12a has the left handle restricting portion 12d, it is possible to prevent the left elastic body 50a from sliding leftward in the left-right direction E1 and leaving the left handle 12a. It should be noted that the fact that the left handle 12a has the left handle restricting portion 12d also applies to the cross-sectional structure of FIG. 8(a). 7(b) and 8(b), the left handle 12a has a convex stepped portion 12i or a protruding portion 12j instead of the left handle restricting portion 12d. By having 12i or projection 12j, it is possible to prevent left elastic body 50a from sliding leftward in left-right direction E1 and detaching from left handle 12a.

In the nailing machine 1, the right body housing 11b, the right handle 12b, and the right elastic body 50b have fitting portions that are substantially bilaterally symmetrical with the left body housing 11a, the left handle 12a, and the left elastic body 50a. ing. As a result, when the left elastic body 50a is fitted between the split left handle 12a and the left main body housing 11a, the left elastic body 50a, the left handle 12a, and the left main body housing 11a are separated even in the split state. can be positioned, and displacement and falling off of the left elastic body 50a can be prevented. Similarly, when the right elastic body 50b is fitted between the split right handle 12b and the right body housing 11b, even in the split state, the right elastic body 50b, the right handle 12b and the right body housing 11b are separated from each other. can be positioned, and displacement and falling off of the right elastic body 50b can be prevented.

In the nailing machine 1 of this embodiment, the elastic body 50 is interposed between the handle 12 and the body housing 11 in the front-rear direction B1 orthogonal to the striking direction (up-down direction C1), so that the impact during nailing can be reduced. When the handle 12 moves relative to the body housing 11 in the vertical direction C1, the elastic body 50 undergoes shear deformation. That is, when the body housing 11 vibrates in the vertical direction C1 due to hammering, the elastic body 50 is not crushed in the sandwiched direction (the front-rear direction B1), but responds to the force applied in the shearing direction. Demonstrate. That is, in the nailing machine 1, the elastic body 50 can absorb the shearing force (hereinafter referred to as shearing stress) generated between the handle 12 and the body housing 11. As shown in FIG. The elastic body 50 has such a shape that the front side portion of the elastic body 50 is fitted with the body housing 11 and the rear side portion of the elastic body 50 is fitted with the handle 12 . As a result, even if the elastic body 50 receives a shearing stress, it is possible to prevent the elastic body 50 from separating from the handle 12 and the body housing 11 . Furthermore, since the elastic body 50 is interposed between the handle 12 and the body housing 11 in the front-rear direction B1, the vibration generated on the body housing 11 side can be cut off and prevented from propagating to the handle 12 side. As a result, workability of the nailing machine 1 can be improved. Moreover, since the elastic body 50 can absorb the shearing stress generated between the body housing 11 and the handle 12, the reliability of the nailing machine 1 can be improved.

In addition, in the nailing machine 1, it is possible to fit the elastic body 50 in the left and right halves into the main body housing 11 and the handle 12 in the left and right halves. Further, the left and right split elastic body 50 is positioned with respect to the left and right split main body housing 11 and the handle 12 by a plurality of fitting portions and protrusions, and measures are taken to prevent the elastic body 50 from coming off. there is Therefore, when assembling the left and right parts of the main body housing 11 and the handle 12 which are divided into two parts, the left elastic body 50a or the right elastic body 50b is preliminarily attached to the main body housing 11 and the handle 12 of the left and right parts, respectively. are assembled, the left body housing 11 and the handle 12 and the right body housing 11 and the handle 12 can be assembled. That is, in the work of assembling the left and right portions of the body housing 11 and the handle 12, the assembly can be performed without increasing the number of man-hours.

Assume a comparative example in which the nailing machine 1 is not provided with the elastic body 50 . In this comparative example, there is a gap between the body housing 11 and the handle 12, and the wiring 23 is exposed through the gap. unfavorable from this point of view. In order to solve this problem, it is conceivable to connect the wiring 23 from the main body housing 11 to the control section 15 via the motor housing portion 13 and the connecting portion 14 instead of pulling out the wiring 23 directly from the main body housing 11 to the handle 12. In this configuration, it is necessary to provide a space for the wiring 23 to pass through the outer circumference of the electric motor 16 in the motor accommodating portion 13, which leads to an increase in the size of the motor accommodating portion 13 and, as a result, an increase in the overall size of the nailing machine 1. , unfavorable. On the other hand, in the nailing machine 1 of the present embodiment, the elastic body 50 is provided and the wiring 23 is passed through the through hole 50j, so that the wiring 23 can be routed from the body housing 11 to the handle 12 without being exposed. It is possible to improve the durability and reduce the size.

Next, a modified nailing machine 1 will be described. The nailing machine 1 of the first modified example shown in FIG. 9 has a structure in which the handle 12 and the battery mounting portion 58 are separated from the housing 10 . The handle 12 and the battery mounting portion 58 are fitted together by a Neidhardt spring (rotatable anti-vibration support) structure. Specifically, a quadrangular prism inner metal portion 55 provided on the battery mounting portion 58 side is arranged inside a frame-shaped outer metal portion 56 provided on the handle 12 side. Four columnar elastic bodies 57 are arranged between the outer metal part 56 and the inner metal part 55 . are mated together. The elastic body 57 is made of rubber, for example. Note that the handle 12 and the body housing 11 are connected via an elastic body 50 . Therefore, in the nailing machine 1 of the first modified example, the handle 12 has a structure in which the front and rear portions thereof are supported by rubber. As a result, the vibration applied to the handle 12 can be reduced, and the workability of the nailing machine 1 can be further improved.

Further, in the nailing machine 1 of the second modified example shown in FIG. 10, the housing 10 has a structure in which the motor accommodating portion 13 and the battery mounting portion 58 are separated. As shown in FIG. 11, the motor housing portion 13 and the battery mounting portion 58 are mounted by mounting screws 60 so as to be rotatable relative to each other. An elastic body 61 is interposed between the motor accommodating portion 13 and the battery mounting portion 58 . The elastic body 61 is made of rubber, for example. That is, in the nailing machine 1 of the second modification, the mounting screw 60 of the handle arm 27 is used to sandwich the elastic body 61 between the motor housing portion 13 and the battery mounting portion 58 . Note that the handle 12 and the body housing 11 are connected via an elastic body 50, as shown in FIG. Therefore, in the nailing machine 1 of the second modification, the vibration applied to the battery as well as the handle 12 can be reduced, and the workability of the nailing machine 1 can be further improved.

The present invention is not limited to the above embodiments, and can be modified in various ways without departing from the scope of the invention. For example, in the above-described embodiment, the elastic body 50 has a structure that can be divided into two parts, which is composed of the left elastic body 50a and the right elastic body 50b attached to the left elastic body 50a. The elastic body may have a structure in which the left elastic body 50a and the right elastic body 50b are integrally formed.

DESCRIPTION OF SYMBOLS 1... Nail gun, 2... Ejection path, 3... Ejection opening, 4... Trigger, 5... Blade guide, 6... Stopper, 7... Ejection part, 8... Push lever, 9... Push lever switch, 10... Housing, 11 Main body housing (first part) 11a Left main body housing (left first member) 11b Right main body housing (right first member) 11c Left main body housing fitting portion (left first member fitting portion ), 11d... left main body housing restricting portion (left first member restricting portion), 11e, 11f, 11g... concave portion (fitting portion), 11h... dividing line, 11i... through hole, 11j... upper part, 11k, 11m, 11n 11p Lower portion 12 Handle (second portion) 12a Left handle (Second left member) 12b Right handle (Second right member) 12c Left handle fitting portion (Second left member) 2-member fitting portion), 12d... left handle regulating portion (left second member regulating portion), 12e... concave portion (fitting portion), 12f... dividing line, 12g... through hole, 12h... front portion, 12i... convex portion Stepped portion 12j Projection portion 12k Rear portion 12m Handle portion 12p Convex Stepped portion 13 Motor accommodating portion (third portion) 13a Left motor accommodating portion 13c Front portion 13d Rear portion , 14... Connecting part 14a... Left side connecting part 15... Control part 16... Electric motor 17... Motor shaft 18... Reducer 19... Battery pack 20... Magazine part 20a... Base member 20b... Feeder Part 21...Detector 22...Switch 23...Wiring 24...Holder part 27...Handle arm 30...Blowing part 31...Plunger 32...Driver blade 33...Guide shaft 34...Weight 35... Spring 36 Weight bumper 37 Plunger bumper 38 Guide plate 41 Trigger switch 42 First gear 43 Second gear 44 Third gear 50 Elastic body 50a Left elastic body , 50b... right elastic body, 50c... left elastic body first fitting portion, 50d... left elastic body second fitting portion, 50e, 50f, 50g, 50h... protrusion (fitting portion), 50i... parting line, 50j, 50k through hole, 50m, 50n, 50p convex stepped portion 50q recessed stepped portion 50r grooved portion 50s stepped portion 55 inner metal portion 56 outer metal portion 57 elastic body, 58... Battery mounting portion 60... Mounting screw 61... Elastic body A1... Center line B1... Front-back direction C1... Up-down direction D1... Downward D2... Upward E1... Left-right direction

Claims (11)

A working machine having a housing and a striking part that moves vertically to strike a fastener,
The housing includes a first portion that supports the hitting portion and a second portion that has a handle portion extending in the front-rear direction,
The second portion is vertically movable relative to the first portion,
An elastic body fitted to the first portion and the second portion is arranged between the first portion and the second portion in the front-rear direction,
The working machine, wherein the elastic body undergoes shear deformation when the second portion moves vertically relative to the first portion. The first portion includes a right first member and a left first member assembled to the right first member,
The second portion includes a right second member and a left second member assembled to the right second member,
The working machine according to claim 1, wherein the elastic body includes a right elastic body and a left elastic body attached to the right elastic body. 3. The method according to claim 2, wherein the right elastic body is fittable with the first right member separated from the first left member and the second right member separated from the second left member. Work machine as described. The right first member has a right first member fitting portion,
4. The right elastic body has a right elastic body first fitting portion that engages with the right first member fitting portion by sliding rightward toward the right first member fitting portion. The working machine described in . 5. The right first member has a right first member restricting portion that restricts the right elastic body first fitting portion from sliding leftward and separating from the right first member fitting portion. The working machine described in . The right second member has a right second member fitting portion,
4. The right elastic body has a right elastic body second fitting portion that engages with the right second member fitting portion by sliding rightward toward the right second member fitting portion. 6. The working machine according to any one of items 1 to 5. 7. The right second member has a right second member restricting portion that restricts the right elastic body second fitting portion from sliding leftward and separating from the right second member fitting portion. The working machine described in . 5. The left first member, the left second member and the left elastic body have fitting portions having a shape substantially symmetrical with the right first member, the right second member and the right elastic body. 8. The work machine according to any one of items 1 to 7. having a wiring extending from the inside of the first portion to the inside of the second portion;
The work machine according to any one of claims 1 to 8, wherein the elastic body has a through hole through which the wiring is inserted. The work machine according to any one of claims 1 to 9, wherein the first portion and the second portion are integral. The first portion has a shape extending in the vertical direction,
The second portion has a shape extending in the front-rear direction, and the front portion is connected to the upper portion of the first portion via the elastic body,
11. The operation of claim 10, having a longitudinally extending shape with a front portion connecting to the lower portion of the first portion and a rear portion bending upward to have a third portion connecting to the rear portion of the second portion. machine.

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