WO2007034850A1

WO2007034850A1 - Driving tool

Info

Publication number: WO2007034850A1
Application number: PCT/JP2006/318684
Authority: WO
Inventors: Toru Uchiyama; Michiaki Adachi; Satoshi Osuga; Hiroki Ishiguro
Original assignee: Max Co., Ltd.
Priority date: 2005-09-22
Filing date: 2006-09-21
Publication date: 2007-03-29
Also published as: TWI421155B; TW200724320A

Abstract

A driving tool, comprising a hammering cylinder in which a hammering piston is vertically slidably installed, a trigger for driving the hammering piston by a pulling operation, a nose part to which a fastener driven out by the hammering piston is fed, a contact member disposed to be projected from the lower end of the nose part, a movable sleeve vertically movably disposed on the hammering cylinder in conjunction with the contact member, a lockout bar fitted to the lower part of the movable sleeve integrally with the movable sleeve, and a cam plate disposed on the side of the lockout bar rotatably in conjunction with the trigger. An engagement part (35) formed in the cam plate (30) is engaged with the lockout bar (14) while the contact member is moved upward when the contact member is pressed against a material to be driven after the trigger (15) is pulled.

Description

Specification

Driving tool

Technical field

[0001] The present invention relates to a driving tool.

Background art

[0002] A gas-fired nail driver is known as an example of a driving tool. A gas-fired nailing machine injects a combustible gas into a combustion chamber sealed in a tool body, agitates a mixed gas of combustible gas and air in the combustion chamber, and mixes the agitated mixed gas into the combustion chamber. By generating a high-pressure combustion gas in the combustion chamber, the high-pressure combustion gas is caused to act on the striking piston accommodated in the striking cylinder, and the striking piston is driven in an impact in the striking cylinder. The nail supplied to the nose part below the body is driven into steel plate or concrete by a driver coupled to the lower surface side of the striking piston.

[0003] By the way, the combustion chamber has a structure in which the movable sleeve, which is disposed on the outer side of the striking cylinder so as to move up and down, is closed and combusted by moving upward, and the movable sleeve is moved up by a contact arm. It is. The contact arm is slidable up and down along the nose part, and its tip protrudes downward from the lower end of the nose part.When the nail is driven, the contact arm is It is configured to move up automatically. The contact arm and the movable sleeve are connected by a link member, and when the contact arm moves upward, the movable sleeve also moves upward via the link member, and the upper end of the contact arm comes into contact with the upper wall of the tool body, so that it is sealed. At the same time, mixed gas is supplied inside.

[0004] The driving tool body is made of synthetic resin, and a trigas switch is provided at the base of the grip to generate sparks and ignite the mixed gas filled in the combustion chamber. A guide portion is formed in the tool body, and a trigger for turning on the trigas switch is slidably accommodated in the guide portion. By pulling the trigger and operating it linearly, the trigger switch is pushed in and turned on, the spark plug ignites, and the mixed gas in the combustion chamber burns. After the driving operation, the combustion chamber is opened. [0005] The trigger is a synthetic resin part, and on one side thereof, a J-shaped trigger lever that operates together with the combustion chamber being sealed and opened is integrally formed. The trigger lever is housed inside the tool body made of synthetic resin, and the other main body is exposed to the outside. The trigger is operated in one direction so as to be able to come into contact with and separate from the trigger switch, and is guided by a guide rod formed on the tool body.

[0006] Further, a lockout bar formed integrally with the link member is arranged beside the cam plate interlocked with the trigger. For this reason, even if the trigger is pulled before the pressing operation of the contact arm, the cam plate cannot hit the lockout bar and cannot rotate, so the trigger cannot be pulled. In other words, the contact arm must be pressed against the material to be driven to form a sealed combustion chamber so that it can only be activated by pulling the trigger (see JP 2005-22069 A).

As described above, if the trigger is pulled and the cam plate is in contact with the lockout bar, the trigger switch cannot be turned on. However, if the contact arm is pressed against the workpiece while the trigger is pulled, the lockout bar slides upward along the cam plate together with the link member, and moves to a position where it is disengaged from the cam plate. Since the chamber is sealed and the trigger can be pulled further, the trigger switch can be turned on. In this case, it is possible to perform so-called contact driving, in which after the trigger is pulled, the contact member is pressed against the driven material to drive the impact mechanism.

[0008] That is, there is a problem that even if it is a gas combustion type nailing machine that cannot normally perform contact driving, the nailing machine is driven if the above-mentioned special method is used.

[0009] Therefore, in order to solve the above problems, a technique is known in which contact firing is not possible by electrically controlling the ignition system (see Japanese Patent Laid-Open No. 7-156076).

[0010] However, the electrical control system is very complicated and increases the cost.

[0011] On the other hand, when the above trigas switch is configured by a photoswitch, the switch-on timing is expensive and can be designed freely. On the other hand, when it is configured with a micro switch, it is inexpensive, but since the stroke of the switching part that is directly pushed in and restored is small, if a micro switch is placed in the middle of the trigger stroke, the switch There is a risk of damaging the pressing part too much. Therefore, when it is configured with a microswitch, the switch must be turned on unless the operator pulls the trigger to the end.

[0012] In addition, the trigger has an asymmetric shape as described above. There is also a slight clearance between the inner surface of the guide and the outer surface of the trigger. Therefore, when a finger is pulled on the trigger and pulled, a force is directly applied to the trigger body on which the finger is hooked, but a load for rotating the cam plate is applied to the divided trigger lever as described later. For this reason, a moment that turns the entire trigger works, and friction is generated between the inner surface of the guide portion and the outer surface of the trigger during pulling operation. Since the guide and trigger are made of synthetic resin and are relatively vulnerable to wear, wear gradually increases as the switch is repeatedly turned on and off. In particular, in the case of a driving tool for driving nails into concrete, the concrete debris when drilled scatters and adheres to the tool, further promoting wear between the guide portion and the trigger. If the guide wears excessively, the guide performance deteriorates, so the trigger rotates and tilts, and the trigger cannot be pulled to the stroke end, resulting in switching failure.

[0013] As described above, the switch does not turn on unless the trigger is pulled to the end, and there is a problem that the feeling of operation is not good, and when the wear progresses, the backlash when the trigger is pulled is large, so the stroke end There is also a problem that the switch does not turn on even when pulled. Disclosure of the invention

[0014] One or more embodiments of the present invention provide a driving tool capable of reliably preventing contact hitting and ensuring safety with a simple structure.

[0015] Further, one or more embodiments of the present invention can improve operability even when a microswitch is used, and can reliably turn on the switch even if the guide portion is worn. A driving tool that can be used.

[0016] According to one or more embodiments of the present invention, a driving tool includes a striking cylinder in which a striking piston is slidable in a vertical direction, a trigger that drives the striking piston by a pulling operation, A nose portion to which a fastener driven by the striking piston is supplied, a contact member disposed so as to protrude from a lower end of the nose portion, and the striking sill A movable sleeve that is arranged to be movable up and down in conjunction with the contact member on the solder, a lockout bar integrally provided with the movable sleeve at a lower portion of the movable sleeve, and a lateral position of the lockout bar. And a cam plate arranged to be rotatable in conjunction with the trigger. The cam plate is formed with an engaging portion, and the cam plate is positioned below the lower end of the lockout bar when the trigger is pulled after the contact member is pressed against the workpiece. The engaging portion engages with the lockout bar in the middle of the upward movement of the contact member when the contact member is pressed against the workpiece after pulling the trigger.

[0017] According to one or more embodiments of the present invention, the engaging portion may be formed in a groove shape.

[0018] According to one or more embodiments of the present invention, the engaging portion may engage with a lower portion of the lockout bar, and the lower portion of the lockout bar may be formed in a U shape. Good.

[0019] According to one or more embodiments of the present invention, the contact member may be slidably provided on the nose portion.

[0020] According to one or more embodiments of the present invention, the driving tool includes a tool body having a grip, a trigger provided at a base of the grip, and a guide for sliding the trigger. A guide portion; and a trigger switch that is provided on the guide portion and can be pressed by pulling the trigger. The trigger has a trigger lever arranged opposite to the trigger switch, and a trigger body for fingering formed separately from the trigger switch, and the trigger lever and the trigger body are arranged in parallel. The trigger lever is interlocked with the pulling operation of the trigger body, and the stroke amount of the trigger body is larger than the stroke amount of the trigger lever.

[0021] According to one or more embodiments of the present invention, the trigger lever and the trigger body may be

And may be connected via a connecting panel.

[0022] According to one or more embodiments of the present invention, the trigger lever is formed with an elongated hole, and the trigger body is formed with a pin that slidably engages with the elongated hole. It may be done.

[0023] According to one or more embodiments of the present invention, the trigger switch is a micro switch. H

[0024] According to one or more embodiments of the present invention, when a contact is made, the contact member is pressed against the driven material while the cam plate is rotated by pulling the trigger first. At the same time, the lockout bar moves upward. However, since the contact member engages with the engaging portion of the lockout bar in the middle of moving upward, it cannot move further upward. Therefore, the movable sleeve also stops at a position where it moves upward, and the combustion chamber is not sealed. The trigger cannot be raised any further. That is, the trigger, the movable sleeve, and the contact member are locked. For this reason, the driving tool cannot be activated. Therefore, contact striking can be reliably prevented with a simple structure in which the engaging portion is formed on the cam plate, and safety can be ensured.

[0025] Further, according to one or more embodiments of the present invention, when a nail is driven and a trigger is pulled by placing a finger on the trigger body, the trigger lever is also interlocked and the trigger as a whole moves together. . Then, since the stroke amount of the trigger lever is smaller than the stroke amount of the trigger body, the trigger lever pushes the trigger switch to turn it on during the movement of the trigger body. In this way, the trigger switch can be turned on before the trigger body is pulled to the stroke end, so that even when a microswitch is used, the operational feeling is improved and the operability can be improved.

[0026] In addition, the trigger body and the trigger lever are configured separately, and the stroke amount of the trigger lever is smaller than the stroke amount of the trigger body, and the trigger lever and the trigger body are connected by a panel. Even if the trigger body tilts, the trigger body has a long stroke, and the connecting panel operates the trigger lever. By pulling the trigger body off, the trigger lever reliably turns on the trigger switch. be able to.

Brief Description of Drawings

FIG. 1 is a longitudinal sectional view showing a gas combustion nailer when not in operation.

FIG. 2 is a longitudinal sectional view showing a gas combustion type nailer during operation.

FIG. 3 is an enlarged view of a trigger peripheral portion of the gas combustion type nailer according to the first embodiment of the present invention.

[Figure 4] Shows the state where the cam plate engages with the lockout bar to prevent contact It is an enlarged view.

FIG. 5 is a perspective view showing engagement between a cam plate and a lockout bar.

FIG. 6 is an enlarged view of a trigger peripheral portion of a gas combustion type nailer according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram of an operation mode of the trigger mechanism shown in FIG.

FIG. 8 is an explanatory diagram of a state where the trigger is pulled to the stroke end in the trigger mechanism shown in FIG.

FIG. 9 is an explanatory diagram of an operation mode in a state where the trigger body is tilted.

Explanation of symbols

[0028] 2 grips

11 movable sleeve

13 contact arm

15, 17 trigger

16 Guide section

14 lockout bar

50 Trigasic

30 cam plate

15a, 72 卜!; Galen

15b, 73HJ

24, 86 consolidated panel

BEST MODE FOR CARRYING OUT THE INVENTION

In FIG. 1, reference numeral 1 denotes a tool body of a gas combustion type driving tool (nailing machine). The tool body 1 is made of synthetic resin, and a grip 2 and a magazine 3 are connected to each other, and a striking piston / cylinder mechanism 4 and a combustion chamber 5 are provided inside.

The striking piston / cylinder mechanism 4 includes a striking piston 7 slidably accommodated in a striking cylinder 6 and a driver 8 integrally coupled to the bottom of the striking piston 7.

[0031] The combustion chamber 5 is an annular movable three-piece disposed between the upper end surface 7a of the striking piston 7, the striking cylinder 6, and an upper wall (cylinder head) 10 formed inside the upper housing. 11 and is formed.

The movable sleeve 11 is linked to a contact arm 13 as a contact member via a link member 12. The contact arm 13 is slidably disposed along the nail driving nose 18 provided below the tool body 1, protrudes from the tip force nose 18, and is panel-biased so that it always protrudes. The upper end is continuously attached to the link member 12.

A lockout bar 14 is formed integrally with the link member 12. By pressing the nose portion 18 against the workpiece P, the contact arm 13 moves relatively upward, and the link member 12 is piled on the panel and pushed up to move the movable sleeve 11 upward until it hits the upper wall 10. As a result, the combustion chamber 5 is shut off from the atmosphere and sealed as shown in FIG. On the contrary, the upper part of the combustion chamber 5 is configured to communicate with the atmosphere by moving the movable sleeve 11 together with the contact arm 13.

[0034] After the combustion chamber 5 is sealed, when the start trigger 15 (17) is pulled, the spark plug 60 ignites the mixed gas, and the mixed gas burns and expands explosively. The pressure of the combustion gas acts on the upper surface of the impact piston 7 and drives downward, so that the driver 8 strikes the leading nail N supplied in the nose portion 18 and drives it into the workpiece P. Thereafter, the movable sleeve 11 moves down and the combustion chamber 5 is opened again.

A lockout bar 14 is formed in a body below the link member 12. The lower part of the lockout bar 14 is formed in a U-shape (see Fig. 5).

[0036] Further, a guide portion 16 for slidably guiding the trigger 15 (17) is provided at the base portion of the grip 2 of the tool body. The guide portion 16 is formed in a box shape having an opening on the lower side and the tool body 1 side. At one end of the upper wall 16a of the guide portion 16, a trigger switch (for example, a microswitch) 50 that can be pressed by pulling the trigger 15 in one direction is disposed.

Example 1

FIG. 3 is an enlarged view of the trigger peripheral portion of the gas combustion type nailer according to the first embodiment of the present invention. The trigger 15 is made of synthetic resin, and is divided into a letter-like trigger lever 15a disposed opposite to the trigger switch 50 and a trigger body 15b formed in a block shape.

[0038] At the lower end of the trigger body 15b, a finger hooking portion 19 for hooking a finger during operation is formed. At the same time, a panel receiving groove 20 is formed, and the panel receiving groove 20 is opened upward on the opposite side of the finger hooking portion 19. Further, a panel receiving piece 21 is formed on one end side of the finger hanging portion 19 so as to extend. The end portion of the panel 22 disposed in the panel receiving groove 20 of the trigger body 15b is engaged with the panel receiving recess 23 of the upper wall 16a of the guide portion 16.

[0039] A protrusion 25 is formed on the upper end of the trigger lever 15a. The protrusion 25 is disposed so as to face the trigger switch 50. A panel receiving groove 26 is formed below the protrusion 25, and a connecting panel 24 is disposed between the panel receiving groove 26 and the panel receiving piece 21. Further, an arm portion 27 is formed at the lower portion of the trigger lever 15a, and a protruding shaft 28 is formed at the lower end thereof. The projecting shaft 28 engages with the cam plate 30! /.

[0040] The cam plate 30 is formed in a substantially triangular shape, and is disposed at a side position of the lockout bar 14. Further, it is rotatably provided on a support shaft 31 provided in the tool body 1. An engaging groove 32 is formed on the outer edge, and the engaging groove 32 is engaged with the protruding shaft 28. As a result, the cam plate 30 can rotate about the support shaft 31 in conjunction with the vertical movement of the trigger 15.

In addition, the inner edge 33 of the cam plate 30 is disposed so as to face the outside of the lockout bar 14. An engagement groove 35 that can be engaged with the lower end 34 of the lockout bar 14 is formed on the inner edge 33.

[0042] When the contact arm 13 moves to the upper moving end, the lower end 34 of the lockout bar 14 is configured to be positioned above the rotation locus of the upper edge 36 of the cam plate 30. Therefore, the cam plate 30 cannot be rotated because the lockout bar 14 is obstructed. However, after the contact arm 13 is moved upward, the cam plate 30 can be rotated by pulling the trigger 15. Can do.

When operating the driving tool having the above-described configuration, the contact arm 13 is usually moved up relatively by first pressing the nose portion 18 of the nailing machine against the upper surface of the driven material P. As a result, the link member 12 is piled up and pushed up by panel biasing, and as shown in FIG. 2, the movable sleeve 11 moves upward, the combustion chamber 5 is shut off from the atmosphere and sealed, and a combustible gas is contained inside. Then, the fan 37 rotates and the mixed gas of combustible gas and air is agitated. When the contact arm 13 moves up, the lockout bar 14 and the link member 12 are simultaneously Also moves up. Thereafter, when the trigger body 15b is pulled and pulled, the trigger lever 15a is also moved upward by the connecting panel 24, so that the cam plate 30 is rotated counterclockwise in the drawing, and the upper edge 36 is already present. Move to the bottom of the lockout bar 14 that is moving up. At the same time, the trigger 15 presses the trigger switch 50 to turn it on, and the mixed gas is ignited by the spark plug 60, and the mixed gas burns explosively. The striking piston 7 is driven by the pressure of the combustion gas, and the driver 8 strikes the leading nail N supplied into the nose portion 18 and drives it into the workpiece P.

[0044] When the striking piston 7 is driven downward, the movable sleeve 11 is also subjected to a force to move downward. When the lower end of the contact arm 13 is pressed against the surface of the driven material P, the movable sleeve 11 11 will not move down. However, since the tool moves away from the workpiece P due to the reaction of nail driving, the movable sleeve 11 can move downward. Coercive force Since the upper edge 36 of the cam plate 30 is positioned and supports the lockout bar 14 below the lower end of the lockout bar 14, the lockout bar 14 cannot move downward. For this reason, the movable sleeve 11 is also held at the same position.

[0045] When the trigger 15 is released and returned to the lower position after the nail driving, the cam plate 30 simultaneously rotates in the reverse direction. For this reason, since there is nothing obstructing the movement below the lockout bar 14, the contact arm 13, the link member 12, the lockout bar 14, the movable sleeve 11 when the contact arm 13 is also released. And return to the initial position below, the combustion chamber 5 is opened, and the next nail driving is prepared.

[0046] On the other hand, when the contact is driven by pulling the trigger 15 ahead of the single shot as described above and driving the nose portion 18 against the driven material P as shown in FIG. When the contact arm 13 is pressed against the workpiece P while pulling the trigger 15 and rotating the cam plate 30, the lockout bar 14 slides upward along the inner edge of the cam plate 30 together with the link member 12. I will do it. However, as shown in FIG. 4, since an engagement groove 35 is formed in the middle of the inner edge 33, the lower end 34 of the lockout bar 14 engages with the engagement groove 35 and beyond. It cannot move upward. Therefore, the movable sleeve 11 also stops at a position where it moves upward. In other words, trigger 15 cannot be raised further. The contact arm 13 cannot be moved any further upward. G Riga 15, movable sleeve 11 and contact arm 13 are locked. For this reason, the driving tool cannot be activated.

[0047] Therefore, contact striking can be reliably prevented at low cost by a simple structure in which the engagement groove 35 is formed in the cam plate.

Note that the engaging portion that engages with the lower end of the lockout bar 14 is not limited to a groove shape such as an engaging groove. It may be formed in a protruding shape.

Example 2

FIG. 6 shows a trigger peripheral portion of a gas combustion type nailer according to the second embodiment of the present invention. The trigger 17 is made of synthetic resin, and is divided into a letter-shaped trigger lever 72 and a trigger body 73 formed in a block shape so as to be opposed to the trigger switch 50.

[0050] At the lower end of the trigger body 73, a finger hook portion 74 for hooking a finger during operation is formed, and a panel receiving groove 75 is formed, and the panel receiving groove 75 is opened above the opposite side of the finger hook portion 74. is doing. Further, a panel receiving piece 76 is formed to extend on one end side of the finger hanging portion 74. The panel 40 is attached to the panel receiving groove 75 of the trigger body 73 and the panel receiving recess 77 formed in the upper wall 16a, and the trigger body 73 is biased downward by the panel 40.

A projection 78 is formed on the upper end of the trigger lever 72. The protrusion 78 is disposed so as to face the trigger switch 50. Further, a panel receiving groove 80 is formed below the projection 78, and the panel receiving groove 80 is opened downward. Further, an arm portion 27 is formed at the lower portion of the trigger lever 72, and a projecting shaft 28 is formed at the lower end thereof. The projecting shaft 28 is formed in a groove 32 of a cam plate 30 provided rotatably on the tool body 1. Is engaged.

[0052] Although the cam plate 30 having the same shape as that of the first embodiment is employed in the present embodiment, the cam plate having another shape is acceptable as long as the cam plate is interlocked with the arm portion of the trigger lever. It may be.

Next, the trigger lever 72 and the trigger main body 73 are connected by a connecting panel 86 in a parallel state. That is, one end of the connecting panel 86 is disposed in the panel receiving groove 80 of the trigger lever 72, and the other end is engaged with the panel receiving piece 76 of the trigger main body 73. The trigger body 73 is formed with a pin 87, and this pin 87 engages with a long hole 88 formed in the upper part of the trigger lever 72, thereby The rig body 73 and the trigger lever 72 can move up and down relatively within a range in which the pin 87 can move through the long hole 88. Thus, the trigger 17 is disposed so as to be able to come into contact with and separate from the trigger switch 50.

Accordingly, when the trigger body 73 is pulled and operated by pulling the finger, the trigger lever 72 is also interlocked via the connection panel 86. The trigger 17 can turn on and off the trigger switch 50 at the time of contact and separation. The trigger lever 72 and the trigger main body 73 come into contact with the upper wall 16a of the guide portion 16 and stop when the pulling operation is performed.

By the way, when the trigger 17 is pulled and actuated, the trigger lever 72 can press the trigger switch 50 while the trigger body 73 is moving. That is, the upper surface 41 of the trigger lever 72 is formed higher than the upper surface 42 of the trigger body 73. That is, the distance L1 between the upper surface 41 of the trigger lever 72 and the upper wall 16a of the guide portion 16 is formed to be smaller than the distance L2 between the upper surface 42 of the trigger body 73 and the upper wall 16a of the guide portion 16. Yes. For this reason, the stroke amount of the trigger lever 72 is smaller than the stroke amount of the trigger body 73.

[0056] In the above-described configuration, when the nail is driven, the trigger body 73 is put on a finger and pulled upward against the panel 40. The connecting panel pushes up the trigger lever 72, so that the trigger moves as a whole. To do. Since the stroke amount of the trigger lever 72 is smaller than the stroke amount of the trigger main body 73, the protrusion 78 at the upper end of the trigger lever 72 is formed on the guide portion 16 during the movement of the trigger main body 73 as shown in FIG. Approach the trigger switch 50 provided on the upper wall 16a, and press the switching member 43 to turn it on. Thereafter, the trigger main body 73 further moves to the position shown in FIG. Therefore, since the trigger switch 50 can be turned on before the trigger body 73 is pulled to the stroke end, even when a micro switch is used, the operational feeling is improved and the operability can be improved.

[0057] The greater the difference between the stroke amount of the trigger lever 72 and the stroke amount of the trigger body 73, the more the trigger body 73 will be switched on while the pull amount of the trigger body 73 is smaller, so the difference in stroke amount is adjusted. By doing so, an optimum pulling amount can be obtained.

[0058] When the trigger 17 is pulled, the lower end protruding shaft 28 of the arm portion 27 of the trigger lever 72 rotates the force plate 30, and the upper end of the cam plate 30 is moved as shown in FIGS. Engage with the lower part of the lockout bar 14 connected to the movable sleeve 11. This will allow you to move Leave 11 is locked and does not move down during combustion. Further, when the trigger 17 is released after nailing, the trigger 17 is moved downward by the panel 40, so that the lock is released and the movable sleeve 11 can be moved downward together with the lockout bar 14.

[0059] By the way, when the trigger body 73 is hooked and pulled up as described above, the trigger lever 72 is formed with an arm for rotating the cam plate 30! Therefore, the trigger body 73 is more trigger lever. Therefore, strong friction is generated between the trigger lever 72 and the guide part 16, and the guide part 16 is worn by repeated on and off, so that the trigger body 73 is correctly When the guide cannot be guided, the trigger body 73 tilts counterclockwise as shown in Fig. 9, and when its corner 44 engages the upper wall 16a of the guide section 16, the trigger 17 can be pulled to the stroke end. Therefore, there is a concern that the trigger switch 50 may not be turned on.

The trigger body 73 and the trigger lever 72 are configured separately from each other, and the stroke amount of the trigger lever 72 is smaller than the stroke amount of the trigger body 73. Are connected by panel 86. Therefore, even if the trigger body 73 tilts, the stroke amount of the trigger body 73 is long, and the connecting panel 86 pushes up the trigger lever 72, so that the protrusion 78 of the trigger lever 72 reliably pushes the trigger switch 50. Can be operated.

[0061] It should be noted that, in the embodiments, the force S described by taking a gas combustion type driving tool as an example of the driving tool, the present invention can also be applied to an electric driving tool.

In the embodiment, a contact nose integrated with the force nose portion described with the contact arm 13 separate from the nose portion 18 may be used.

[0063] Although the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. It is.

[0064] This application is based on a Japanese patent application filed on September 22, 2005 (Japanese Patent Application 2005-276895) and a Japanese patent application filed on September 22, 2005 (Japanese Patent Application 2005-276896). Yes, the contents of which are incorporated herein by reference.

Industrial applicability In the driving tool, contact strikes are reliably prevented to ensure safety, the trigger operability is improved, and the switch can be turned on reliably even if the guide and trigger are worn.

Claims

The scope of the claims

[1] A striking cylinder having a striking piston slidable in the vertical direction;

A trigger for driving the striking piston by a pulling operation;

A nose portion to which a fastener to be driven out by the striking piston is supplied, a contact member disposed so as to protrude from a lower end of the nose portion, and disposed on the striking cylinder so as to be vertically movable in conjunction with the contact member. A movable sleeve

A lockout bar provided integrally with the movable sleeve at a lower portion of the movable sleeve;

A force plate disposed at a side position of the lockout bar so as to be rotatable in conjunction with the trigger.

An engagement portion is formed on the cam plate,

The cam plate is positioned below the lower end of the lockout bar when the trigger is pulled after the contact member is pressed against the workpiece.

The engaging portion is a driving tool that engages with the lockout bar while the contact member moves upward when the contact member is pressed against the driven material after pulling the trigger.

[2] The driving tool according to [1], wherein the engaging portion is formed in a groove shape.

[3] The engagement portion engages with a lower portion of the lockout bar,

2. The driving tool according to claim 1, wherein a lower portion of the lockout bar is formed in a U shape.

4. The driving tool according to claim 1, wherein the contact member is slidably provided on the nose portion.

[5] a guide portion for slidably guiding the trigger;

A trigger switch provided on the guide portion and capable of being pressed by pulling the trigger;

The trigger has a trigger lever disposed opposite to the trigger switch, and a trigger body for finger hanging that is formed separately from the trigger switch, The trigger lever and the trigger body are arranged in parallel and are connected via a connection panel,

The driving tool according to claim 1, wherein a stroke amount of the trigger body is larger than a stroke amount of the trigger lever.

[6] a tool body having a grip;

A trigger provided at the base of the grip;

A guide portion for slidably guiding the trigger;

A trigger switch provided on the guide portion and capable of being pressed by pulling the trigger.

The trigger includes a trigger lever disposed to face the trigger switch, and a trigger body for a finger hook formed separately from the trigger switch,

The trigger lever and the trigger body are arranged in parallel,

The trigger lever is interlocked with the pulling operation of the trigger body,

A driving tool in which the stroke amount of the trigger body is larger than the stroke amount of the trigger lever.

7. The driving tool according to claim 6, wherein the trigger lever and the trigger main body are connected via a connection panel.

[8] The trigger lever is formed with a slot,

The driving tool according to claim 6, wherein a pin that slidably engages with the elongated hole is formed in the trigger body.

9. The driving tool according to claim 6, wherein the trigger switch is a micro switch.

[10] A striking cylinder having a striking piston slidable in the vertical direction;

A lockout bar provided integrally with the movable sleeve at a lower portion of the movable sleeve; A force plate disposed at a side position of the lockout bar so as to be rotatable in conjunction with the trigger.

An engagement portion is formed on the cam plate,

7. The driving tool according to claim 6, wherein the engaging portion engages with the lockout bar while the contact member moves upward when the contact member is pressed against the driven material after the trigger is pulled. .