JP5983796B2 - Driving tool - Google Patents

Description

  The present invention relates to a driving tool, and more particularly to a driving tool characterized by an impact absorbing mechanism during driving.

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

  For example, Patent Document 1 describes a plunger that is constantly biased downward by a spring, and a spring-driven nailer that sequentially drives out nails in a magazine by a driver fixed to the plunger. Yes.

Japanese Patent No. 3344454

  In such a driving tool, if the nose part of the driving tool moves away from the driven material due to the reaction during driving, the nail cannot be driven sufficiently, or the driver's dents that are removed from the nail may be in the driven material. There is a problem of being attached.

  In order to suppress such a reaction, 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 pressed strongly against the material to be driven, there is a problem that the material to be driven is damaged at the nose portion or the worker is fatigued.

  Therefore, an object of the present invention is 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 a reaction during driving.

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

(Claim 1)
The invention described in claim 1 is characterized by the following points.

That is, the driving tool according to claim 1 is provided with a driver provided to be slidable toward the injection port in order to drive the fastener from the injection port provided at the tip of the tool, and a reaction at the time of driving the fastener. a balancer which is provided to absorb, and the balancer biasing member for biasing said balancer, and a biasing member for biasing the driver, the balancer biasing member independent of the biasing member Provided by the balancer urging force of the balancer urging member when the driver is driven to absorb reaction force, and when the urging force is stored in the urging member, the balancer is attached. The biasing force is also stored in the biasing member .

(Claim 2)
The invention described in claim 2 has the following features in addition to the features of the invention described in claim 1 described above.

That is, a motor that rotates to a Jo Tokoro direction, the motor biasing force accumulated in said balancer biasing member and the biasing member by rotating, and the biasing member further said motor rotates The urging force stored in the balancer urging member is released.

(Claim 3 )
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or 2 .

  In other words, the balancer continues to move even after the driver has finished driving the fastener.

(Claim 4 )
The invention described in claim 4 is characterized by the following points in addition to the features of the invention described in any one of claims 1 to 3 .

  That is, the moving speed of the driver is faster than the moving speed of the balancer.

  The present invention is as described above, and when the driver slides in the direction of the injection port, there is provided a balancer that is moved by being urged in a direction away from the injection port by the balancer urging member. For this reason, at the time of driving, a force is applied to the tool in a direction away from the workpiece, but at the same time, a force that presses the tool in the direction of the workpiece is applied by the reaction force of the balancer biasing member biasing the balancer. . That is, the “force applied in the direction away from the driven material” and the “force pressing in the direction of the driven material” cancel each other, so that the reaction received at the time of driving can be absorbed. For this reason, since a sufficient driving force can be obtained with a small pressing force against the material to be driven, the fatigue of the operator is reduced. In addition, it is difficult for the driver to come off the fastener due to the reaction and damage the workpiece.

  As the above-described balancer urging member, a spring mechanism that operates when the driver slides in a direction away from the injection port can be used. When the spring mechanism is used, the “force to press in the direction of the driven material” can be generated by the spring force of the spring mechanism.

  Further, the balancer described above may be formed so as to be pulled in the direction of the injection port via the string-like member when the driver slides in a direction away from the injection port. If formed in this way, the balancer and the driver can be physically linked, so that it becomes easy to operate the balancer in accordance with the operation at the time of driving.

  Further, it is preferable that the balancer slides substantially in parallel with the driver. By sliding the balancer substantially parallel to the driver, the reaction during driving can be efficiently absorbed.

  Further, the balancer may be formed so as to slide along a balancer guide provided substantially in parallel with the fastener launching direction.

  The reaction absorbing mechanism according to the present invention may be applied to a spring-driven driving tool. In a spring-driven driving tool, the reaction force at the time of driving increases due to the spring force of the driving spring, but such a reaction can be effectively absorbed. Specifically, the driver is connected, the plunger urged toward the injection port, the plunger is pushed up against the urging force, and the pushed plunger is released to release the driver. A driving mechanism for sliding the fastener in the direction of the injection port, a string member for connecting the balancer and the plunger, and a direction change for changing the direction of the force applied to the string member The balancer is pulled by the string-like member when the plunger is pushed up and slides in the direction of the injection port, and is biased when the plunger is released. What is necessary is just to form so that it may slide in the direction away from the said injection port.

  Further, when the reaction absorbing mechanism according to the present invention is applied to a spring-driven driving tool, it is preferable that the string-like member is stretched around the direction changing portion so as to be relaxed. By making the string-like member relaxable, the balancer can be prevented from being pulled by the plunger. That is, since the balancer is released from the plunger (and the string-like member) by the slack of the string-like member and can operate independently, the balancer is not disturbed by the plunger (and the string-like member), and the balancer is the balancer biasing member. It is energized by the energizing force. And the force which presses a driving tool in the direction of a to-be-placed material arises by the reaction force of this energizing force, and it can absorb a reaction.

  Similarly, when the reaction absorbing mechanism according to the present invention is applied to a spring-driven driving tool, the balancer is formed so as to slide in a cylindrical portion provided substantially parallel to the fastener driving direction, A plunger guide for guiding sliding of the plunger may be provided on at least one side of the cylindrical portion. According to such an aspect, since the balancer can be disposed inside the tubular portion and the plunger can be disposed outside the tubular portion, the plunger unit including the reaction absorbing mechanism can be configured in a small and well-organized manner. It is possible to reduce the manufacturing cost and the product size.

  The balancer may be provided on the grip side with respect to the driver. If comprised in this way, since a driver can be located in the anti-grip side as much as possible, it is not necessary to provide an extra protrusion in the anti-grip side. By not providing the protrusion on the non-grip side, the nose portion can be used as close to the wall surface as possible, so that it is possible to cope with a finishing driving tool that needs to be able to drive a fastener into a corner portion, for example.

  Further, the balancer may be formed so as to continue moving even after the driver has been driven into the fastener. If formed in this way, the timing at which reaction absorption by the balancer ends can be set after completion of fastener driving by the driver, so that the reaction absorption mechanism can be operated reliably until completion of fastener driving.

It is sectional drawing of a driving tool. It is an external view of a plunger unit. It is an external view of a plunger. It is (a) AA sectional drawing of a plunger unit, (b) It is a side view. It is BB sectional drawing of a 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 a plunger unit, Comprising: It is a figure which shows the state which has a plunger in a bottom dead center position. It is sectional drawing of a plunger unit, Comprising: It is a figure which shows the state which has a plunger in a top dead center position. It is sectional drawing of a plunger unit, Comprising: It is a figure which shows the state in which the plunger is moving from a top dead center position to a bottom dead center position. It is a partial expanded sectional view of a plunger unit, Comprising: (a) The figure which shows the pulley vicinity in the state in which the plunger is moving from a top dead center position to a bottom dead center position, (b) CC sectional drawing (part) (Omitted). It is sectional drawing of a plunger unit, Comprising: It is a figure which shows the state immediately after a plunger reaches | attains from a top dead center position to a bottom dead center position. It is explanatory drawing which shows balance of force in the state which has a plunger in a top dead center position. It is explanatory drawing which shows the amount of reaction in the state in which the 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, Comprising: It is (a) DD sectional drawing and (b) side view of the plunger unit which provided the vibration proof material. It is a figure which concerns on the 2nd modification of this embodiment, Comprising: It is a 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, Comprising: It is sectional drawing of the plunger unit which provided the tension spring as a balancer urging member. It is a figure which concerns on the 4th modification of this embodiment, Comprising: It is sectional drawing of the plunger unit which provided the magnetic spring as a balancer biasing member. It is a figure which concerns on the 5th modification of this embodiment, Comprising: It is sectional drawing of the plunger unit which has arrange | positioned the balancer outside the pipe. It is a figure which concerns on the 6th modification of this embodiment, Comprising: (a) Side surface sectional drawing of the plunger unit which changed the shape of the balancer guide, (b) It is EE sectional drawing. It is a figure which concerns on the 7th modification of this embodiment, Comprising: (a) Front view, (b) Plan view sectional view, (c) Side view cross section of the plunger unit which provided the plunger guide only on one side of the pipe FIG. It is a figure which concerns on the 8th modification of this embodiment, Comprising: It is a figure which shows the driving tool using a flywheel.

  Embodiments 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 driver 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 in which a driver 31 for driving a nail is connected to the inside of the housing 11, a drive mechanism 20 for operating the plunger unit 30, and the driver 31. The magazine 12 is loaded with connected nails (connected staples).

  A nose portion 15 is provided at the front end 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 part 15 is driven out from the injection port 16 provided at the tip of the nose part 15 by the driver 31. The driver 31 according to the present embodiment is provided as a part of the plunger unit 30 and slides toward the injection port 16 when the plunger unit 30 is actuated, thereby supplying the nail portion 15 to the nose portion 15. Is ejected from the injection port 16.

  As shown in FIG. 2, the plunger unit 30 is configured as an elongated rod-shaped unit by fixing plunger guides 34 on both sides of a pipe 35 having a cylindrical portion functioning as a balancer guide. A plunger 32 is slidably mounted on the pipe 35, and further, a plunger urging member 33 for constantly urging the plunger 32 toward the injection port 16 is also mounted.

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

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

  A driver connecting portion 32 b for connecting the driver 31 is formed on the side of the plunger 32. A driver 31 is connected to the driver connecting portion 32b, and the driver 31 is also slid as the plunger 32 slides.

  As shown in FIG. 3, the plunger 32 has a pipe hole 32e through which the pipe 35 passes, and a guide roller 32a is provided on both side walls of the pipe hole 32e. It has been. As shown in FIG. 4, the guide roller 32 a slides in the rail portion 34 a 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 engagement portion 32 c and a second engagement portion 32 d for engaging with the drive mechanism 20 are formed on the side portion of the plunger 32 so as to protrude. 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 (the drive mechanism 20 side). The first engaging portion 32c and the second engaging portion 32d are provided at different height positions (relative to the injection port 16), that is, as shown in FIG. The first engaging portion 32c is provided at a position closer to the injection port 16 than the second engaging portion 32d. For this reason, the 1st engaging part 32c and the 2nd engaging part 32d are arrange | positioned so that it may become alternate with respect to the sliding direction of the plunger 32. FIG.

  The drive mechanism 20 that pushes up the plunger 32 against the urging force of the plunger urging member 33 includes 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 actuated when the trigger 14 is operated, and is configured to operate until it is detected by a micro switch (not shown) that the plunger 32 has been moved to a predetermined position.

  The driving tool 10 is provided with a control device (not shown) having a CPU, a RAM, and the like. The control device drives the motor 17 based on input signals from the trigger 14 and the microswitch. Be controlled.

  The drive mechanism 20 rotates the gear while the plunger 32 is engaged with the gear, thereby pushing up the plunger 32. Then, by releasing the engagement between 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 so as to drive out nails.

  Specifically, as shown in FIG. 6A, a first torque gear 22 and a second torque gear 23 are rotatably supported on a torque gear plate 21 fixed to the housing 11, and this first 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. Accordingly, the plunger 32 is gradually lifted by sequentially engaging the first torque gear 22 to the second torque gear 23.

  FIG. 6B shows a state where the plunger 32 is at the bottom dead center position (a state where driving of the nail by the driver 31 is completed). When the first torque gear 22 and the second torque gear 23 are rotated from this state, the torque roller 22 a of the first torque gear 22 is engaged with the first engagement portion 32 c 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 is at the uppermost position, the engagement between the torque roller 22a and the first engagement portion 32c is released. At this time, the torque roller 23a of the second torque gear 23 engages with the second engagement portion 32d of the plunger 32 before the engagement between the torque roller 22a and the first engagement portion 32c is released.

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

  Thereafter, as shown in FIG. 6 (e), when the gear rotates further and the second torque gear 23 rotates to the position where the torque roller 23a is at the uppermost position, the engagement between the torque roller 23a and the second engagement portion 32d. Comes off. Thereby, since the plunger 32 is urged by the plunger urging member 33, it moves to the bottom dead center position shown in FIG. As a result, the driver 31 connected to the plunger 32 slides in the direction of the injection port 16 so that the nail is driven out.

  In the present embodiment, the plunger 32 at normal time 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 configured to operate and sequentially wait for the top dead center position shown in FIG. 6 (d) through the state shown in FIG. 6 (e) → FIG. 6 (b) → FIG. 6 (c).

  That is, when the trigger 14 is operated, the control device that has received the operation signal starts driving the motor 17. As a result, when the gear rotates to the position shown in FIG. 6E, a nail driving operation is performed. The motor 17 continues to drive even after the nail driving operation is finished. As a result, when the plunger 32 moves to the top dead center position shown in FIG. When receiving the microswitch signal, the control device controls the motor 17 to stop driving.

  By the way, the plunger unit 30 in the present embodiment includes a reaction mechanism for absorbing the reaction in the nail driving operation as described above.

  As shown in FIG. 5, the reaction 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 can slide on the inside of the pipe 35. As described above, since the pipe 35 is arranged in parallel with the nail launch direction, the balancer 36 that slides in the pipe 35 is formed to slide in parallel with the driver 31.

  The balancer urging member 37 is a spring mechanism that operates by being disposed in the pipe 35, and a compression spring is used. The balancer urging member 37 is disposed 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 in a cylindrical shape whose outer surface is closed, but instead, for example, a slit or an opening may be provided on the outer surface, or a prismatic shape may be provided. You may form by.

  The balancer 36 is connected to the plunger 32 via a wire 39 as a string-like member, and moves in conjunction with the movement of the plunger 32. 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 portion, the driver 31 is lifted from the injection port 16 by pushing the plunger 32 up to the drive mechanism 20. When sliding in the direction of separating, 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.

  When the plunger 32 is released from the drive mechanism 20 and the driver 31 slides in the direction of the injection port 16 and the nail driving operation is performed, the tension by the wire 39 is released. The balancer urging member 37 is urged and moved 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 force 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 view showing the plunger unit 30 and shows a state in which the plunger 32 is at the bottom dead center position. In this state, the plunger 32 is urged toward the injection port 16 by the plunger urging member 33 and is pressed against the rubber bumper 41. The balancer 36 is urged in a direction away from the injection port 16 by the balancer urging member 37 and is pressed against the rubber balancer stop 38. At this time, the wire 39 is stretched almost without slack.

  FIG. 8 is a view showing a state where the plunger 32 is pushed up by the drive mechanism 20 and the plunger 32 is at 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 in the direction of the injection port 16 against the urging force of the balancer urging member 37. Has been pulled.

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

  When the engagement between the plunger 32 and the drive mechanism 20 is released from the state shown in FIG. 8, the plunger 32 moves toward the injection port 16 by the urging force of the plunger urging member 33 as shown in FIG. start. Then, since the wire 39 that has pulled 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 by 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 biasing reaction force P1 of the plunger urging member and the driving reaction force P2, and the force for separating the driving tool 10 from the driven material. Will be added.

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

  For this reason, the urging reaction force P1 and 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 during driving is reduced. The recoil that cannot be canceled out by the urging reaction force P3 of the balancer urging member is offset by the pressing load P4 (which may include the machine weight in some cases) by the operator.

  The loosening of the wire 39 at the time of driving is generated 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 between the urging forces of 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. Therefore, the wire 39 is slackened by the difference in speed.

  As shown in FIG. 10, the wire 39 is stretched around the pulley 40 so as to be relaxed, and is guided using a space S formed by the housing 11. For this reason, even if the loosened wire 39 is detached from the pulley 40, it is guided by the space S, so that it does not get caught in other parts.

  FIG. 11 is a view 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 finished). 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 with the urging force of the balancer urging member 37. That is, since the movement speed of the plunger 32 is set to be faster than the movement speed of the balancer 36, the balancer 36 reaches the balancer stop 38 after the plunger 32 reaches the bumper 41. When the balancer 36 reaches the balancer stop 38, the state returns to the state shown in FIG.

  In this 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, shock absorption by the balancer 36 and the balancer urging member 37 (the urging reaction force P3 of the balancer urging member). Is generated 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 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 that is urged and moved in a direction away from the injection port 16 by the balancer urging member 37. Is provided. Therefore, at the time of driving, a force is applied to the driving tool 10 in a direction away from the driven material, but at the same time, the balancer urging member 37 urges the balancer 36 to cause the driving tool 10 to move to the driven material. Adds force to push in the direction. That is, the “force applied in the direction away from the driven material” and the “force pressing in the direction of the driven material” cancel each other, so that the reaction received at the time of driving can be absorbed. For this reason, since a sufficient driving force can be obtained with a small pressing force against the material to be driven, the fatigue of the operator is reduced. Further, it is difficult for the driver 31 to come off the nail due to the reaction and damage the workpiece.

  The balancer 36 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 a direction away from the injection port 16. For this reason, the balancer 36 and the driver 31 can be physically interlocked, and the balancer 36 can be operated in accordance with the operation at the time of driving.

  The balancer 36 slides in parallel with the driver 31. For this reason, since the “force applied in the direction away from the driven material” and the “force pressing in the direction of the driven material” are parallel and opposite to each other, the reaction at the time of driving can be efficiently absorbed.

  Further, the wire 39 is stretched around the pulley 40 so as to be relaxed, and the balancer 36 is not pulled by the plunger 32. For this reason, the balancer 36 is released from the plunger 32 (wire 39) by the loosening of the wire 39 and can operate independently, and the balancer 36 is not obstructed by the plunger 32 (wire 39), and the balancer 36 is It is energized by the energizing force. And the force which presses the driving tool 10 in the direction of a to-be-placed material arises by the reaction force of this urging force, and it can absorb a reaction.

  The balancer 36 is slidable in a pipe 35 provided parallel to the nail launch direction, and plunger guides 34 for guiding the sliding of the plunger 32 are provided on both sides of the pipe 35. For this reason, since the balancer 36 can be arrange | positioned inside the pipe 35 and the plunger 32 can be arrange | positioned outside the pipe 35, the plunger unit 30 provided with the reaction absorption mechanism can be comprised compactly and can be comprised small. Costs can be reduced and product size can be reduced.

  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 closer to the grip 13 than the driver 31. For this reason, since the driver 31 can be positioned on the side opposite to the grip 13 as much as possible, it is not necessary to provide an extra protrusion on the side opposite to the grip 13. By not providing the protrusion on the side opposite to the grip 13, the nose portion 15 can be used as close to the wall surface as possible, so that it is possible to cope with a finishing driving tool that needs to be able to drive nails into corner portions, 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. For this reason, since the timing at which reaction absorption by the balancer 36 ends can be set after completion of driving of the nail by the driver 31, the reaction absorbing mechanism can be operated reliably until completion of driving of the nail.

  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. Also good. The vibration isolator 50 may be formed of an elastic material such as rubber or urethane.

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

  If such a vibration isolator 50 is provided, vibration during the operation of the plunger unit 30 (vibration of the plunger urging member 33 or the balancer urging member 37, vibration generated by sliding of the plunger 32 or the balancer 36, The vibration generated by the collision with the bumper 41) can be suppressed, so that the sound generated when the nail is driven can be reduced.

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

  In the above-described embodiment, the compression spring is used as the balancer urging member 37. However, the present invention is not limited to this, and a tension spring may be used. Further, as long as a reaction force is generated, a biasing 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 using fluid pressure may be used.

  In the above embodiment, the balancer 36 slides in parallel with the driver 31. However, the present invention is not limited to this, and the balancer 36 may slide 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 present invention 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, or the moving speed of the plunger 32 may be set to be slower than the moving speed of the balancer 36.

  In the above-described embodiment, the plunger 32 and the balancer 36 start moving simultaneously 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 at the top dead center position, the movement of the balancer 36 can be delayed more than the movement of the plunger 32.

  In the above-described embodiment, the balancer 36 and the plunger 32 are connected by the 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.

  Moreover, in above-described embodiment, although the plunger unit 30 was arrange | positioned inside the housing 11, it is not restricted to this. For example, as shown in FIG. 15, the balancer 36 may be disposed outside the housing 11. Further, the entire plunger unit 30 may be disposed outside the housing 11. In this case, the entire plunger unit 30 may be covered with a case different from the housing 11.

  In the above-described embodiment, the compression spring is used as the balancer urging member 37. However, 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. In addition, as shown in FIG. 17, a magnetic spring (arranged so that two magnets that repel each other face each other) may be used as the balancer urging member 37.

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

  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 to slide outside 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, a plunger hoisting mechanism 42 as shown in FIG. 18 may be provided. That is, the plunger hoisting mechanism 42 is actuated by a motor to wind up the plunger hoisting wire 43 so that the plunger 32 is pushed up against the urging force of the plunger urging member 33.

  In the above-described embodiment, the pipe 35 of the cylindrical portion is used as a 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 at least two points 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 periphery of the balancer 36, but the range of contact points to be sandwiched may be reduced to a rectangular shape instead of an arc shape.

  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 part may be caused to function as the direction changing part by simply sliding the string-like member along the edge part of the predetermined member.

  In the above-described embodiment, the plunger guides 34 that guide the sliding of the plunger 32 are provided on both sides of the cylindrical portion (pipe 35). However, the present invention is not limited to this. For example, as shown in FIG. 20, a plunger guide 34 for guiding the sliding of the plunger 32 may be provided only on one side of the cylindrical portion (pipe 35). Or you may make it the structure which provides a plunger guide as much as possible around a cylindrical part (pipe 35), and improves guide property.

  Further, as shown in FIG. 21, a flywheel mechanism may be used for reaction 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 simultaneously with the driving operation. When the tool is rotated in the direction, the main body of the driving tool 10 receives a rotational force in a reverse direction (a direction in which the front side is lowered) by reaction. Therefore, the reaction force can be reduced by offsetting the force that the main body of the driving tool 10 is lifted by the rotational force and the reaction force at the time of driving.

  It is desirable that the flywheel 44 be rotated in conjunction with the driver 31 so that the linear motion of the driver 31 and the rotational motion of the flywheel 44 are independently rotated. Further, the closer the center of rotation of the flywheel 44 is to the center of gravity of the driving tool 10, the more the center of rotation of the flywheel 44 becomes the center of gravity of the driving tool 10. It is desirable to install them nearby.

DESCRIPTION OF SYMBOLS 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 First torque gear 22a Torque roller 23 Second torque gear 23a Torque roller 30 Plunger unit 31 Driver 32 Plunger 32a Guide roller 32b Driver connecting portion 32c First engagement portion 32d Second engagement portion 32e Pipe hole 33 Plunger biasing member 34 Plunger guide 34a Rail portion 35 Pipe (balancer guide)
36 Balancer 37 Balancer urging member 38 Balancer stop 39 Wire (string-like member)
40 pulley (direction changer)
41 Bumper 42 Plunger hoisting mechanism 43 Plunger hoisting wire 50 Anti-vibration material S space P1 Energizing reaction force of the plunger energizing member P2 Driving reaction force P3 Energizing reaction force of the balancer energizing member P4 Pressing load by the operator

Claims (4)

A driver provided to be slidable toward the injection port in order to drive the fastener from the injection port provided at the tip of the tool;
A balancer which is provided to absorb the recoil when driving fasteners
A balancer biasing member for biasing the balancer;
A biasing member that biases the driver;
With
The balancer biasing member is provided independently of the biasing member,
When the driver is driven, the balancer moves by the urging force of the balancer urging member to perform reaction absorption,
The driving tool according to claim 1, wherein when the biasing force is stored in the biasing member, the biasing force is also stored in the balancer biasing member . A motor which rotates to a Jo Tokoro direction,
A biasing force is stored in the biasing member and the balancer biasing member by rotating the motor, and a biasing force stored in the biasing member and the balancer biasing member by further rotating the motor. characterized in that but is released, driving tool according to claim 1. 3. The driving tool according to claim 1, wherein the balancer continues to move after the driver has completed driving the fastener. 4. The driving tool according to any one of claims 1 to 3 , wherein a moving speed of the driver is faster than a moving speed of the balancer.

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