JP6943312B2 - Driving tool - Google Patents

Description

The present invention relates to a driving tool, and more particularly to a driving tool characterized by a shock absorbing mechanism at the time of driving.

Conventionally, as this type of driving tool, a tool driven by compressed air, a tool driven by a spring force, and the like are known.

For example, Patent Document 1 describes a plunger that is constantly urged downward by a spring and a spring-driven nailing machine that sequentially ejects nails in a magazine by a driver fixed to the plunger. There is.

Japanese Patent No. 3344454

In such a driving tool, if the nose portion of the driving tool is separated from the driving material due to the reaction at the time of driving, the nail cannot be sufficiently driven or the dent of the driver that comes off the nail becomes the driving material. There is a problem that it sticks.

In order to suppress such recoil, it is necessary to strongly press the nose portion of the driving tool against the material to be driven. However, if the nose portion is strongly pressed against the material to be driven, there arises a problem that the material to be driven is damaged by the nose portion or the operator is tired.

Therefore, it is an object of the present invention to provide a driving tool capable of obtaining a sufficient driving force with a small pressing force against a material to be driven by providing a mechanism for absorbing the recoil at the time of driving.

The present invention has been made to solve the above-mentioned problems, and is characterized by the following.

(Claim 1)
The invention according to claim 1 is characterized by the following points.

That is, in the driving tool according to claim 1, the driver provided slidably toward the injection port and the driver are connected in order to launch the fastener from the injection port provided at the tip of the tool. A plunger, a balancer slidably provided in conjunction with the operation of the plunger, and a balancer guide for guiding the sliding of the balancer are provided, and the balancer guide is arranged so as to penetrate the plunger. It is characterized in that it guides the sliding of the plunger.

(Claim 2)
The invention according to claim 2 is characterized by the following points in addition to the feature points of the invention according to claim 1 described above.

That is, a balancer stop that regulates the movement of the balancer is arranged above the balancer guide, and a bumper that regulates the movement of the plunger is arranged below the balancer guide .

(Claim 3)
The invention according to claim 3 is characterized by the following points in addition to the feature points of the invention according to claim 2 described above.

That is, the balancer guide is arranged so as to penetrate the bumper .

The present invention is as described above, and when the driver slides toward the injection port, the balancer slides in a direction away from the injection port. That is, the balancer 36 slides at the time of driving, so that a force for pressing the driving tool 10 in the direction of the material to be driven is applied. Therefore, a sufficient driving force can be obtained with a small pressing force against the material to be driven, so that the fatigue of the operator is reduced. In addition, the reaction causes the driver to come off the fastener, and the problem of damaging the material to be driven is unlikely to occur.
In addition, the balancer guide is arranged so as to penetrate the plunger. Therefore, since the balancer can be arranged inside the balancer guide and the plunger can be arranged outside the balancer guide, the plunger unit equipped with the recoil absorption mechanism can be cohesively and small, and the manufacturing cost can be reduced. Or the product size can be reduced.

It is sectional drawing of the driving tool. It is an external view of a plunger unit. It is an external view of a plunger. It is (a) AA cross-sectional view, (b) side view of a plunger unit. It is BB sectional view of the plunger unit. It is explanatory drawing which shows a mode that a plunger is pushed up by a drive mechanism. It is sectional drawing of the plunger unit, and is the figure which shows the state which the plunger is in the bottom dead center position. It is sectional drawing of the plunger unit, and is the figure which shows the state which the plunger is in the top dead center position. It is sectional drawing of the plunger unit, and is the figure which shows the state which the plunger is moving from the top dead center position to the bottom dead center position. A partially enlarged cross-sectional view of the plunger unit, which shows (a) the vicinity of the pulley in a state where the plunger is moving from the top dead center position to the bottom dead center position, and (b) a CC cross section (partial). Omitted). It is sectional drawing of the plunger unit, and is the figure which shows the state immediately after the plunger reaches the bottom dead center position from the top dead center position. It is explanatory drawing which shows the balance of the force in the state which the plunger is in the top dead center position. It is explanatory drawing which shows the recoil amount in the state which a plunger is moving from a top dead center position to a bottom dead center position. It is a figure which concerns on the 1st modification of this Embodiment, is (a) DD cross-sectional view, (b) side view of the plunger unit provided with the vibration isolator. It is a figure which concerns on the 2nd modification of this embodiment, and is the figure which shows the driving tool which provided the balancer outside the housing. It is a figure which concerns on the 3rd modification of this embodiment, and is sectional drawing of the plunger unit provided with the tension spring as a balancer urging member. It is a figure which concerns on the 4th modification of this embodiment, and is sectional drawing of the plunger unit provided with the magnetic spring as a balancer urging member. It is a figure which concerns on the 5th modification of this embodiment, and is the cross-sectional view of the plunger unit which arranged the balancer outside the pipe. It is a figure which concerns on the 6th modification of this Embodiment, is (a) side sectional view, (b) EE sectional view of the plunger unit which changed the shape of a balancer guide. It is a figure which concerns on the 7th modification of this embodiment, (a) front view, (b) plan view sectional view, (c) side view sectional view of the plunger unit which provided the plunger guide only on one side of a pipe. It is a figure. It is a figure which concerns on the 8th modification of this embodiment, and is the figure which shows the driving tool using a flywheel.

An embodiment of the present invention will be described with reference to the drawings.

The driving tool 10 according to the present embodiment is a spring-driven nail driving machine driven by a spring force, and is formed so as to drive a nail as a fastener. As shown in FIG. 1, the driving tool 10 is driven by a plunger unit 30 to which a driver 31 for driving nails is connected, a drive mechanism 20 for operating the plunger unit 30, and a driver 31 inside the housing 11. It is configured to include a magazine 12 loaded with connecting nails (connecting staples), and the like.

A nose portion 15 is provided at the front end portion of the magazine 12, and the leading nail of the connecting nail loaded in the magazine 12 is supplied to the nose portion 15 by a supply device (not shown). The leading nail supplied to the nose portion 15 is driven out by the driver 31 from an injection port 16 provided at the tip of the nose portion 15. The driver 31 according to the present embodiment is provided as a part of the plunger unit 30, and when the plunger unit 30 is operated, the driver 31 slides toward the injection port 16 and is supplied to the nose portion 15 by the nail. Is launched from the ejection port 16.

As shown in FIG. 2, the plunger unit 30 constitutes an elongated rod-shaped unit by fixing the plunger guides 34 on both sides of a tubular pipe 35 that functions as a balancer guide. A plunger 32 is slidably exteriorized on the pipe 35, and a plunger urging member 33 for always urging the plunger 32 toward the injection port 16 is also exteriorized.

The plunger guide 34 is for guiding the sliding of the plunger 32, and as shown in FIGS. 4 and 5, a rail portion 34a is formed in the longitudinal direction on the inner side facing the pipe 35.

In the plunger unit 30, as shown in FIG. 1, the longitudinal direction of the pipe 35 is parallel to the nail launching direction, and the driver 31 is the farthest from the grip 13 (in other words, the pipe 35 is It is fixed inside the housing 11 (so that it is closer to the grip 13 than the driver 31).

A driver connecting portion 32b for connecting the driver 31 is formed on the side portion of the plunger 32. A driver 31 is connected to the driver connecting portion 32b, and the driver 31 is formed so as to slide in accordance with the sliding of the plunger 32.

As shown in FIG. 3, the plunger 32 has a pipe hole 32e for penetrating the pipe 35 in the center, and guide rollers 32a are provided on the walls on both sides of the pipe hole 32e. Has been done. As shown in FIG. 4, the guide roller 32a slides in the rail portion 34a of the plunger guide 34. The plunger 32 is guided so as to slide along the pipe 35 and the plunger guide 34 by providing the pipe hole 32e and the guide roller 32a.

As shown in FIG. 3, a first engaging portion 32c and a second engaging portion 32d for engaging with the drive mechanism 20 are projected on the side portion of the plunger 32. The first engaging portion 32c and the second engaging portion 32d are provided on the side opposite to the side where the driver connecting portion 32b is provided (drive mechanism 20 side). The first engaging portion 32c and the second engaging portion 32d are provided at different height positions (positions relative to the injection port 16), that is, as shown in FIG. 3B, the first engaging portion 32c and the second engaging portion 32d are provided. The 1 engaging portion 32c is provided at a position closer to the injection port 16 than the second engaging portion 32d. Therefore, the first engaging portion 32c and the second engaging portion 32d are arranged so as to be staggered with respect to the sliding direction of the plunger 32.

The drive mechanism 20 that pushes up the plunger 32 against the urging force of the plunger urging member 33 is configured to include a plurality of gears as shown in FIG. The plurality of gears are rotated by the driving force of the motor 17. The motor 17 is formed so as to operate when the trigger 14 is operated and until it is detected by a microswitch (not shown) that the plunger 32 has moved to a predetermined position.

A control device (not shown) equipped with a CPU, RAM, or the like is provided inside the driving tool 10, and the motor 17 is driven by this control device based on input signals from the trigger 14 and the micro switch. Be controlled.

The drive mechanism 20 rotates the gear with the plunger 32 engaged with the gear, thereby pushing up the plunger 32. Then, by disengaging the gear and the plunger 32, the plunger 32 is moved by the urging force of the plunger urging member 33, and the driver 31 connected to the plunger 32 is slid in the direction of the injection port 16. It is formed to drive out a nail.

Specifically, as shown in FIG. 6A, the first torque gear 22 and the second torque gear 23 are rotatably supported by the torque gear plate 21 fixed to the housing 11, and the first torque gear plate 21 is rotatably supported. The drive mechanism 20 is configured by rotating the torque gear 22 and the second torque gear 23. The first torque gear 22 and the second torque gear 23 are arranged side by side along the sliding direction of the plunger 32, and the first torque gear 22 is arranged closer to the injection port 16 than the second torque gear 23. As a result, the plunger 32 is gradually lifted by engaging with the first torque gear 22 to the second torque gear 23 in order.

FIG. 6B shows a state in which the plunger 32 is in the bottom dead center position (a state in which the driver 31 has completed the ejection of the nail). When the first torque gear 22 and the second torque gear 23 are rotated from this state, the torque roller 22a of the first torque gear 22 engages with the first engaging portion 32c of the plunger 32.

Then, as shown in FIG. 6C, the plunger 32 is lifted upward by the first torque gear 22 as it is. When the first torque gear 22 rotates to the position where the torque roller 22a comes to the top, the torque roller 22a and the first engaging portion 32c are disengaged. At this time, the torque roller 23a of the second torque gear 23 engages with the second engaging portion 32d of the plunger 32 before the torque roller 22a and the first engaging portion 32c are disengaged.

Then, as shown in FIG. 6D, the plunger 32 is lifted upward by the second torque gear 23 as it is, and the plunger 32 moves to the top dead center position.

After that, as shown in FIG. 6E, when the second torque gear 23 further rotates to the position where the torque roller 23a comes to the top, the torque roller 23a and the second engaging portion 32d are engaged with each other. Comes off. As a result, the plunger 32 is urged by the plunger urging member 33, and thus moves to the bottom dead center position shown in FIG. 6 (b). As a result, the driver 31 connected to the plunger 32 slides in the direction of the injection port 16 and is formed so that the nail is driven out.

In the present embodiment, the plunger 32 in the normal state stands by at the top dead center position shown in FIG. 6D, and the drive mechanism 20 is triggered by the operation of the trigger 14. It is formed so as to operate, go through the states shown in FIG. 6 (e) → FIG. 6 (b) → FIG. 6 (c) in sequence, and wait again at the top dead center position shown in FIG. 6 (d).

That is, when the trigger 14 is operated, the control device that receives the operation signal starts driving the motor 17. As a result, when the gear rotates to the position shown in FIG. 6 (e), the nail driving operation is performed. Then, the motor 17 continues to drive even after the nail driving operation is completed. As a result, when the plunger 32 moves to the top dead center position shown in FIG. 6D, the above-mentioned micro switch is pressed by the plunger 32. Upon receiving the signal of the microswitch, the control device controls so that the driving of the motor 17 is stopped.

By the way, the plunger unit 30 in the present embodiment is provided with a recoil mechanism for absorbing the recoil in the nail driving operation as described above.

As shown in FIG. 5, this recoil mechanism includes a balancer 36 slidably provided in the pipe 35, and a balancer urging member 37 that urges the balancer 36 in a direction away from the injection port 16. It is configured.

The balancer 36 is a cylindrical metal member formed along the inner diameter of the pipe 35, and is slidable inside the pipe 35. As described above, since the pipe 35 is arranged in parallel with the nail launching direction, the balancer 36 sliding in the pipe 35 is formed so as to slide in parallel with the driver 31.

Further, the balancer urging member 37 is a spring mechanism that is arranged and operates in the pipe 35, and a compression spring is used. The balancer urging member 37 is arranged closer to the injection port 16 than the balancer 36, and urges the balancer 36 in a direction away from the injection port 16.

In the present embodiment, the pipe 35 is formed as a cylindrical shape with an outer surface closed, but instead of this, for example, a slit or an opening may be provided on the outer surface, or a prismatic shape. It may be formed by such as.

The balancer 36 is connected to the plunger 32 via a wire 39 of a string-like member, and moves in conjunction with the plunger 32 when it moves. Specifically, since the direction of the force applied to the wire 39 is changed by about 180 degrees by the pulley 40 provided as the direction changing unit, the driver 31 is pushed from the injection port 16 by pushing up the plunger 32 to the drive mechanism 20. When sliding in the direction of separation, the balancer 36 is pulled by the wire 39 and moves in the direction of the injection port 16. At this time, the balancer urging member 37 is compressed and the spring force is stored.

Then, when the plunger 32 is released from the drive mechanism 20 and the driver 31 slides in the direction of the injection port 16 to drive the nail, the tension by the wire 39 is released, so that the balancer 36 is released. The balancer urging member 37 urges and moves in a direction away from the injection port 16.

The reaction absorption in the present embodiment is performed by the reaction force of the urging by the balancer urging member 37. Hereinafter, the reaction absorption mechanism will be described in detail with reference to the operation of the plunger unit 30.

FIG. 7 is a diagram showing the plunger unit 30, showing a state in which the plunger 32 is in the bottom dead center position. In this state, the plunger 32 is urged in the direction of the injection port 16 by the plunger urging member 33, and is pressed against the rubber bumper 41. Further, the balancer 36 is urged by the balancer urging member 37 in a direction away from the injection port 16, and is pressed against the rubber balancer stop 38. At this time, the wire 39 is in a stretched state with almost no slack.

FIG. 8 is a diagram showing a state in which the plunger 32 is pushed up by the drive mechanism 20 and the plunger 32 is in the top dead center position. In this state, the plunger 32 is pushed up in a direction away from the injection port 16 against the urging force of the plunger urging member 33. Further, as the plunger 32 is pushed up, the wire 39 is pulled, and the balancer 36 connected to the other end of the wire 39 moves toward the injection port 16 against the urging force of the balancer urging member 37. It is being pulled.

In this state, as shown in FIG. 12, the housing 11 receives the urging force of the plunger urging member 33 and the balancer urging member 37, and the forces are in a balanced state.

When the plunger 32 and the drive mechanism 20 are disengaged from the state of FIG. 8, as shown in FIG. 9, the plunger 32 moves toward the injection port 16 due to the urging force of the plunger urging member 33. start. Then, since the wire 39 pulling the balancer 36 is loosened, the balancer 36 is in a free state, and the balancer 36 starts to move away from the injection port 16 due to the urging force of the balancer urging member 37.

At this time, as shown in FIG. 13, a reaction force at the time of driving is generated by the urging reaction force P1 of the plunger urging member and the driving reaction force P2, and the force that tries to separate the driving tool 10 from the material to be driven. Is added.

However, in the driving tool 10 according to the present embodiment, the driving tool 10 is formed so as to apply a force for pressing the driving tool 10 against the material to be driven by the urging reaction force P3 of the balancer urging member. That is, since the balancer urging member 37 urges the balancer 36 in a direction away from the injection port 16, a reaction force is generated at a portion receiving the balancer urging member 37 on the opposite side of the balancer 36. That is, a force is generated to press the housing 11 of the driving tool 10 against the material to be driven.

Therefore, the urging reaction force P1 and the driving reaction force P2 of the plunger urging member and the urging reaction force P3 of the balancer urging member cancel each other out, and the reaction at the time of driving is reduced. The reaction that cannot be canceled by the urging reaction force P3 of the balancer urging member is offset by the pressing load P4 by the operator (the machine weight may be added to this).

The slack of the wire 39 at the time of driving is caused by setting the moving speed of the plunger 32 to be faster than the moving speed of the balancer 36. That is, by adjusting the difference in urging force between the plunger urging member 33 and the balancer urging member 37, the weight of the plunger 32 and the balancer 36, the sliding resistance, etc., the moving speed of the plunger 32 is higher than the moving speed of the balancer 36. Since it is set to be faster, the wire 39 is loosened due to this difference in speed.

Then, as shown in FIG. 10, the wire 39 is stretched on the pulley 40 so as to be relaxable, and is guided by utilizing the space S formed by the housing 11. Therefore, even if the loose wire 39 comes off from the pulley 40, it is guided by the space S and is formed so as not to be caught in other portions.

FIG. 11 is a diagram showing a state immediately after the plunger 32 further moves from the state of FIG. 9 and the plunger 32 reaches the bumper 41 (immediately after the nail driving is completed). As shown in this figure, immediately after the plunger 32 reaches the bumper 41, the balancer 36 does not reach the balancer stop 38 and continues to move by the urging force of the balancer urging member 37. That is, since the moving speed of the plunger 32 is set to be faster than the moving speed of the balancer 36, the balancer 36 reaches the balancer stop 38 after the plunger 32 reaches the bumper 41. Then, when the balancer 36 reaches the balancer stop 38, the state returns to the state shown in FIG.

In the present embodiment, by providing a time lag between the stop timing of the plunger 32 and the stop timing of the balancer 36 in this way, the impact absorption by the balancer 36 and the balancer urging member 37 (the urging reaction force P3 of the balancer urging member) is provided. Is formed so as to continue until the nail driving is completed. Further, a force is applied in the reaction direction due to the impact of the balancer 36 colliding with the balancer stop 38, and the timing at which this reaction occurs is set after the nail driving is completed.

As described above, according to the present embodiment, when the driver 31 slides in the direction of the injection port 16, the balancer 36 is urged and moved by the balancer urging member 37 in a direction away from the injection port 16. Is provided. Therefore, at the time of driving, a force is applied to the driving tool 10 in a direction away from the material to be driven, but at the same time, the reaction force of the balancer urging member 37 urging the balancer 36 causes the driving tool 10 to be driven by the material to be driven. A force that pushes in the direction is applied. That is, by canceling the "force applied in the direction away from the material to be driven" and the "force pressed in the direction of the material to be driven", the reaction received at the time of driving can be absorbed. Therefore, a sufficient driving force can be obtained with a small pressing force against the material to be driven, so that the fatigue of the operator is reduced. In addition, the driver 31 is less likely to come off the nail due to the reaction and damage the material to be driven.

Further, the balancer 36 described above is formed so as to be pulled in the direction of the injection port 16 via the wire 39 when the driver 31 slides in the direction away from the injection port 16. Therefore, the balancer 36 and the driver 31 can be physically interlocked with each other, and the balancer 36 can be operated according to the operation at the time of driving.

Further, the balancer 36 slides in parallel with the driver 31. Therefore, since the "force applied in the direction away from the material to be driven" and the "force pressed in the direction of the material to be driven" are in parallel and opposite directions, the reaction during driving can be efficiently absorbed.

Further, the wire 39 is stretched on the pulley 40 so as to be relaxable, and the balancer 36 is not pulled by the plunger 32. Therefore, when the wire 39 is loosened, the balancer 36 is released from the plunger 32 (wire 39) and can operate independently, and the balancer 36 can be operated independently without being disturbed by the plunger 32 (wire 39). It is urged by the urging force. Then, the reaction force of this urging force generates a force for pressing the driving tool 10 in the direction of the material to be driven, and the reaction can be absorbed.

Further, the balancer 36 is slidable in a pipe 35 provided parallel to the nail launching direction, and plunger guides 34 for guiding the sliding of the plunger 32 are provided on both sides of the pipe 35. Therefore, since the balancer 36 can be arranged inside the pipe 35 and the plunger 32 can be arranged outside the pipe 35, the plunger unit 30 provided with the recoil absorbing mechanism can be cohesively and small. The cost can be reduced and the product size can be reduced.

Further, the plunger unit 30 is fixed in the housing 11 so that the driver 31 is farthest from the grip 13, that is, the balancer 36 is provided on the grip 13 side of the driver 31. Therefore, since the driver 31 can be positioned on the anti-grip 13 side as much as possible, it is not necessary to provide an extra protrusion on the anti-grip 13 side. By not providing the protrusion on the anti-grip 13 side, the nose portion 15 can be used as close to the wall surface as possible, so that it can be used for a finishing driving tool that needs to be able to drive a nail into a corner portion, for example.

Further, the balancer 36 is formed so as to continue moving even after the driving of the nail by the driver 31 is completed. Therefore, since the timing at which the reaction absorption by the balancer 36 ends can be set after the completion of the nail driving by the driver 31, the reaction absorption mechanism can be reliably operated until the nail driving is completed.

Although not particularly described above, as shown in FIG. 14, when the plunger unit 30 is fixed to the housing 11, a vibration isolator 50 is provided between the plunger unit 30 and the housing 11. May be good. The vibration isolator 50 may be formed of an elastic material such as rubber or urethane.

Specifically, as shown in FIG. 14, the vibration isolator 50 can be provided between the plunger guide 34 and the housing 11 or at a contact portion between the plunger unit 30 and the housing 11 on the reflection outlet 16 side.

If such a vibration isolator 50 is provided, vibration during operation of the plunger unit 30 (vibration of the plunger urging member 33 and the balancer urging member 37, vibration generated by sliding of the plunger 32 and the balancer 36, and the plunger 32 Since vibration generated by the collision with the bumper 41) can be suppressed, the noise generated when driving the nail can be reduced.

In the above-described embodiment, a spring-driven nailing machine driven by a spring force has been described as an example, but the present invention is not limited to this, and the tool may be driven by another drive source such as compressed air or electricity. Can also be applied.

Further, in the above-described embodiment, the compression spring is used as the balancer urging member 37, but the present invention is not limited to this, and a tension spring may be used. Further, as long as a reaction force is generated, other urging means other than the spring may be used. For example, an elastic body other than a spring may be used, an electric / magnetic means may be used, or an urging means by fluid pressure or the like may be used.

Further, in the above-described embodiment, the balancer 36 is slid in parallel with the driver 31, but the present invention is not limited to this, and the balancer 36 may be slid at an angle with respect to the sliding direction of the driver 31.

Further, in the above-described embodiment, the moving speed of the plunger 32 is set to be faster than the moving speed of the balancer 36, but the movement speed is not limited to this. The moving speed of the plunger 32 and the moving speed of the balancer 36 may be set to be equal to each other, or the moving speed of the plunger 32 may be set to be slower than the moving speed of the balancer 36.

Further, in the above-described embodiment, the plunger 32 and the balancer 36 start moving at the same time during the driving operation, but the present invention is not limited to this. For example, if the wire 39 is loosened while the plunger 32 is in the top dead center position, the movement of the balancer 36 can be delayed more than the movement of the plunger 32.

Further, in the above-described embodiment, the balancer 36 and the plunger 32 are connected by a wire 39, but the present invention is not limited to this. For example, the balancer 36 and the plunger 32 may be connected by a belt or the like.

Further, in the above-described embodiment, the plunger unit 30 is arranged inside the housing 11, but the present invention is not limited to this. For example, as shown in FIG. 15, the balancer 36 may be arranged outside the housing 11. Further, the entire plunger unit 30 may be arranged outside the housing 11. In this case, the entire plunger unit 30 may be covered with a case different from the housing 11.

Further, in the above-described embodiment, the compression spring is used as the balancer urging member 37, but the present invention is not limited to this. For example, as shown in FIG. 16, a tension spring may be used as the balancer urging member 37. Further, as shown in FIG. 17, a magnetic spring (two magnets repelling each other arranged so as to face each other) may be used as the balancer urging member 37.

Further, in the above-described embodiment, the wire 39 is used as the string-shaped member, but the present invention is not limited to this. For example, a belt, a fine cloth, a string, a thread, or the like may be used.

Further, in the above-described embodiment, the balancer 36 is formed so as to slide inside the pipe 35, but the present invention is not limited to this. For example, as shown in FIG. 18, the balancer 36 may be formed so as to slide on the outside of the pipe 35. At this time, the plunger 32 may be formed so as to slide inside the pipe 35. In this case, as the drive mechanism 20, for example, the plunger hoisting mechanism 42 as shown in FIG. 18 may be provided. That is, the plunger hoisting mechanism 42 may be operated by the motor to wind the plunger hoisting wire 43, and the plunger 32 may be pushed up against the urging force of the plunger urging member 33.

Further, in the above-described embodiment, the tubular pipe 35 is used as the balancer guide for guiding the balancer 36, but the present invention is not limited to this. For example, as shown in FIG. 19, a balancer guide 35 having a shape that guides the balancer 36 so as to sandwich the balancer 36 at at least two points or more from the side surface may be used.

In the example of FIG. 19, the balancer guide 35 has a substantially arc shape along the outer circumference of the balancer 36, but the range of the contact points to be sandwiched may be reduced to a rectangular shape instead of the arc shape.

Further, in the above-described embodiment, the pulley 40 is used as the direction changing unit, but the present invention is not limited to this. For example, the edge portion may function as a direction changing portion by simply sliding the string-shaped member along the edge portion of the predetermined member.

Further, in the above-described embodiment, the plunger guides 34 for guiding the sliding of the plunger 32 are provided on both sides of the tubular portion (pipe 35), but the present invention is not limited to this. For example, as shown in FIG. 20, a plunger guide 34 that guides the sliding of the plunger 32 may be provided only on one side of the tubular portion (pipe 35). Alternatively, a plunger guide may be provided around the tubular portion (pipe 35) as much as possible to enhance the guideability.

Further, as shown in FIG. 21, a flywheel mechanism may be used for recoil absorption. That is, a flywheel 44 that rotates clockwise as shown in FIG. 21 is provided near the center of the driving tool 10 main body, and the flywheel 44 is rotated clockwise in the direction in which the front side (driver 31 side) rises almost at the same time as the driving operation. When it is rotated to, the driving tool 10 main body receives a rotational force in the opposite direction (the direction in which the front side is lowered) due to the reaction. Therefore, the recoil can be reduced by canceling the lifting force of the driving tool 10 main body by the rotational force and the recoil at the time of driving.

It is desirable that the flywheel 44 is rotated in conjunction with the driver 31, and the linear motion of the driver 31 and the rotational motion of the flywheel 44 are driven to rotate independently. Further, the closer the center of rotation of the flywheel 44 is to the center of gravity of the driving tool 10, the more it rotates around the center of gravity, and the effect can be exhibited. Therefore, the center of rotation of the flywheel 44 should be the center of gravity of the driving tool 10. It is desirable to install it nearby.

10 Driving tool 11 Housing 12 Magazine 13 Grip 14 Trigger 15 Nose part 16 Injection port 17 Motor 20 Drive mechanism 21 Torque gear plate 22 1st torque gear 22a Torque roller 23 2nd torque gear 23a Torque roller 30 Plunger unit 31 Driver 32 Plunger 32a Guide roller 32b Driver connecting part 32c 1st engaging part 32d 2nd engaging part 32e Pipe hole 33 Plunger urging member 34 Plunger guide 34a Rail part 35 Pipe (balancer guide)
36 Balancer 37 Balancer urging member 38 Balancer stop 39 Wire (string-shaped member)
40 pulley (direction changer)
41 Bumper 42 Plunger hoisting mechanism 43 Plunger hoisting wire 50 Anti-vibration material S space P1 Plunger urging member urging reaction force P2 Drive-in reaction force P3 Balancer urging member urging reaction force P4 Pushing load by operator

Claims (3)

A screwdriver provided so as to be slidable toward the injection port in order to launch the fastener from the injection port provided at the tip of the tool.
The plunger to which the driver is connected and
A balancer provided so as to be slidable in conjunction with the operation of the plunger,
A balancer guide that guides the sliding of the balancer ,
With
When the driver slides toward the injection port, the balancer slides in a direction away from the injection port to absorb the recoil at the time of driving the fastener.
The balancer guide is a driving tool, characterized in that it is arranged so as to penetrate the plunger. A balancer stop that regulates the movement of the balancer is placed above the balancer guide.
The driving tool according to claim 1 , wherein a bumper for restricting the movement of the plunger is arranged below the balancer guide. The driving tool according to claim 2 , wherein the balancer guide is arranged so as to penetrate the bumper.

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