Driving tool

Abstract

To provide a driving tool in which the vicinity of a nose part can ne constituted more compactly, in comparison with a conventional contact arm.SOLUTION: The driving tool comprises: a contact part 23, provided to be slidable with respect to a nose part 22, which can be pressed against a material to be driven; switching means 39 that switches whether to actuate an actuation mechanism 15 in tandem with the contact part 23; and a transmitting part 30 that transmits movements of the contact part 23 to the switching means 39. When the contact part 23 is pressed against the material to be driven and is slid, tensile force acts on the transmitting part 30 to transmit force, so that the switching means 39 is brought into a contact-on state.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to an implanting tool for implanting a fastener into an implanted material, and particularly to an implanting tool provided with a safety mechanism for detecting a state of being pressed against the implanted material.

Background Art

[0002] As this type of implanting tool, it is known that an implanting operation is executed only when both an operation of pressing and sliding a contact member provided at the tip of a nose portion against an implanted material (contact on) and an operation of pulling a trigger with a fingertip (trigger on) are performed. By configuring in this way, since the implanting operation is not executed by only one on-operation, an inadvertent implanting operation can be prevented.

[0003] For example, in the tool described in Patent Document 1, a contact arm is supported at the tip of the nose portion so as to be relatively displaceable vertically, and a configuration in which the contact arm is pressed against the implanted material and relatively moved upward is disclosed. The contact arm extends from near the tip of the nose portion to near the trigger, and the pressing operation against the implanted material is transmitted to a contact lever disposed inside the trigger. When the pressing operation of the contact arm and the operation of the trigger are performed simultaneously, the contact lever operates a switch valve, and the implanting operation is configured to be started.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] As described above, the contact arm must extend from the nose section to near the trigger due to its purpose. As a result, the area around the nose section where the contact arm is located bulges outward, which reduces visibility in the nose section and can interfere with firing. Furthermore, if a cover is added to prevent the sliding contact arm from being unnecessarily operated, the shape bulges outward even more.

[0006] Furthermore, the contact arm needs to accurately transmit the load when the tip of the nose section is pressed against the surface, and it must be formed so as not to easily deform under external load. For this reason, the contact arm needs to be made of a rigid material such as sheet metal, which presents the problem of increasing the weight of the machine.

[0007] This invention was made in view of the current situation, and aims to provide a driving tool that can be configured more compactly around the nose compared to conventional contact arms. [Means for solving the problem]

[0008] To solve the above-mentioned problems, the present invention provides an output unit incorporating an operating mechanism for driving in a fastener, a trigger operably provided for operating the operating mechanism, a nose portion integrally provided at the tip of the output unit, a contact portion slidably provided with respect to the nose portion and pressable against a material to be driven in, a switching means for switching whether or not the operating mechanism is activated in conjunction with the contact portion, and a transmission unit for transmitting the movement of the contact portion to the switching means, wherein the switching means is configured to take a contact-off state in which the operating mechanism is not activated even when the trigger is operated, and a contact-on state in which the operating mechanism is activated when the trigger is operated, and when the contact portion is pressed against the material to be driven in and slides, tension acts on the transmission unit and force is transmitted, causing the switching means to enter the contact-on state. [Effects of the Invention]

[0009] As described above, the present invention is configured such that when the contact portion is pressed against the material to be driven and slides, tension acts on the transmission portion, transmitting force and causing the switching means to enter a contact-on state. In other words, since the transmission portion only needs to transmit tension, it is possible to use a material with lower rigidity than conventional materials (for example, a flexible material such as a string-like member). Furthermore, even if the transmission portion is damaged or cut as a result of using a material with low rigidity, force will not be transmitted to the switching means and it will not enter a contact-on state, so safety will not be compromised.

[0010] In this way, by using materials with lower rigidity than conventional materials, the nose section can be made more compact. Furthermore, since contact arms made of sheet metal or similar materials are no longer required, the machine can be made lighter.

[0011] Furthermore, by using flexible materials such as string-like members for the transmission section, it becomes possible to position the transmission section along the machine. This increases the degree of freedom in layout and reduces outward bulging, allowing for an even more compact design around the nose section. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view of a driving tool. [Figure 2] This is a perspective view of the driving tool with the cover removed. [Figure 3] This is a perspective view of the driving tool with the cover removed, seen from a different angle. [Figure 4] This is a cross-sectional view of the driving tool in the contact-off state. [Figure 5] This is a cross-sectional view of line AA in Figure 4 (partially enlarged cross-sectional view). [Figure 6] This is a magnified side view of a portion of the nose area when the contact lenses are off. [Figure 7] This is a cross-sectional view of a drive tool in the contact-on state. [Figure 8] It is a sectional view taken along line B-B in FIG. 7 (partially enlarged sectional view). [Figure 9] It is a partially enlarged side view near the nose part in the contact-on state. [Figure 10] It is a partially enlarged sectional view near the trigger, and is (a) a view in the contact-off state and trigger-off state, (b) a view in the contact-on state and trigger-off state, and (c) a view in the contact-on state and trigger-on state. [Figure 11] It is a partially enlarged sectional view for explaining the adjustment mechanism, and is (a) a view in a state where the tension of the wire is loosened and (b) a view in a state where the tension of the wire is increased. [Figure 12] It is a partially enlarged sectional view for explaining the transmission mechanism, and is (a) a view in the contact-off state and (b) a view in the contact-on state.

Mode for Carrying Out the Invention

[0013] Embodiments of the present invention will be described with reference to the drawings.

[0014] The driving tool 10 according to this embodiment drives a fastener into a material to be driven. As shown in FIGS. 1 to 3, this driving tool 10 includes an output unit 12, a grip 11, a trigger 20, a magazine 19, a nose part 22, and a contact part 23. In the following description, as shown in FIG. 4, the direction in which the fastener is driven out is the downward direction, and the opposite direction of the downward direction is the upward direction. Also, when viewed in the extending direction of the grip 11 orthogonal to the vertical direction, the output unit 12 side is the front direction, and the grip end 11a side is the rear direction.

[0015] The output unit 12 has a built-in operating mechanism 15 that performs the driving operation of the fastener inside a cylindrical body housing. The driving tool 10 according to this embodiment has a built-in pneumatic operating mechanism 15 that drives the fastener by the pressure of compressed air. Note that this operating mechanism 15 is merely an example, and the operating mechanism 15 may be provided with other power sources (for example, a gas combustion type operating mechanism 15 or an electric type operating mechanism 15, etc.).

[0016] As shown in FIG. 4, the actuating mechanism 15 includes a cylinder 16, a piston 17, and a driver 18. Specifically, the piston 17 is slidably accommodated in the cylindrical cylinder 16, and a driver 18 for striking a fastener is coupled and provided on the lower surface of the piston 17. When compressed air is supplied to the upper surface of the piston 17, the piston 17 descends abruptly, and the fastener is pushed downward by the driver 18 that operates integrally with the piston 17.

[0017] The grip 11 is a rod-shaped portion that an operator grips when using the driving tool 10. This grip 11 is connected to the output portion 12 described above at a substantially right angle and extends rearward of the output portion 12. A trigger 20 is provided on the grip 11 at a position that can be operated by the hand gripping the grip 11. Specifically, the trigger 20 is disposed at a position where the index finger is placed when the operator grips the grip 11 (below the vicinity of the front end of the grip 11), and the trigger 20 can be pulled by the index finger. This trigger 20 is for operating the driving of the fastener. That is, the actuating mechanism 15 is actuated on the condition that the trigger 20 is operated, and the fastener is driven.

[0018] The magazine 19 is for storing a connecting fastener formed by connecting a plurality of fasteners. The connecting fasteners stored in this magazine 19 are sequentially supplied to a nose portion 22 described later and are held so that the leading fastener is positioned directly below the driver 18.

[0019] The nose portion 22 is a portion integrally provided at the lower end of the output portion 12. Although not particularly shown, a fastener supply mechanism is provided behind the nose portion 22, and by operating this fastener supply mechanism in conjunction with the driving operation, the fasteners stored in the magazine 19 are automatically supplied to the nose portion 22 one by one.

[0020] An injection path is formed inside the nose portion 22 to guide the injection of the fastener. Fasteners supplied by the fastener supply mechanism wait within this injection path. As the aforementioned driver 18 slides toward the nose portion 22, the fasteners waiting within the injection path are ejected from the tip 22a of the nose portion.

[0021] This nose section 22 is fixed to the lower end of the output section 12, and is either integrally formed with the output section 12 or fixed to the output section 12 in an immovable manner.

[0022] The contact portion 23 is provided so as to protrude below the nose portion 22 and is a part that can be pressed against the material to be driven in. This contact portion 23 is slidable vertically relative to the nose portion 22 and is biased to protrude downward in its natural state. By pressing this contact portion 23 against the material to be driven in and pushing it upward, the switching means (described later) enters the contact-on state, and the fastener can be driven in. On the other hand, when the contact portion 23 is not pushed upward, the switching means is in the contact-off state (the operation of the trigger 20 is disabled), so the fastener will not be driven in even if the trigger 20 is operated.

[0023] As shown in Figures 2, 3, 6, and 9, the contact portion 23 according to this embodiment includes a contact tip portion 24, a connecting member 25, an adjustment dial 26, and the like.

[0024] The contact tip portion 24 is a component positioned to protrude further forward than the nose portion 22. This contact tip portion 24 is equipped with a cylindrical guide path, which communicates with the injection path of the nose portion 22. Therefore, the fastener ejected from the nose portion tip 22a passes through the guide path of the contact tip portion 24 and is driven into the material to be driven. An injection port 24a of the fastener, which contacts the material to be driven, is formed at the front end of the contact tip portion 24.

[0025] The connecting member 25 is a member connected above the contact tip portion 24. This connecting member 25 is inserted inside a cylindrical sliding guide 27 fixed to the nose portion 22. The connecting member 25 also rotatably supports a screw shaft (not shown) inside the sliding guide 27. This screw shaft rotates when the adjustment dial 26 (described later) is rotated, and moves up and down along the longitudinal direction of the sliding guide 27. The up and down movement of the screw shaft causes the entire contact portion 23, including the contact tip portion 24, to move up and down.

[0026] Furthermore, in its natural state, the connecting member 25 is biased downward by a spring (not shown). This downward pressure on the connecting member 25 by the spring biases the entire contact portion 23 in a protruding direction. By pressing the contact portion 23 against the material to be driven, the contact portion 23 slides upward against the spring's biasing force. As shown in Figure 6, the end of a wire 30 (described later) is fixed to the connecting member 25. The wire 30 is connected to the wire connection portion 25a of the connecting member 25 so as to extend downward. Therefore, when the connecting member 25 moves upward by pressing the contact portion 23 against the material to be driven, the wire 30 is pulled upward.

[0027] The adjustment dial 26 is provided to be operable in order to adjust the amount of protrusion of the contact portion 23 (contact tip portion 24) in its natural state. This adjustment dial 26 is provided to be rotatable relative to the sliding guide 27. When the adjustment dial 26 is rotated, a screw shaft located inside the sliding guide 27 rotates, and the contact portion 23 is configured to move up and down relative to the sliding guide 27 by the action of the screw. In this way, the contact portion 23 according to this embodiment allows the amount of protrusion of the contact tip portion 24 to be adjusted within a predetermined range by operating the adjustment dial 26. When the amount of protrusion of the contact tip portion 24 is reduced, the distance from the nose portion tip 22a to the nozzle 24a becomes smaller, so the fastener can be driven in deeper. On the other hand, when the amount of protrusion of the contact tip portion 24 is increased, the distance from the nose portion tip 22a to the nozzle 24a becomes larger, so the fastener is driven in shallowly (a so-called "floating" state). Furthermore, even when the amount of protrusion of the contact tip 24 is changed in this way, the vertical position of the connecting member 25 relative to the nose portion 22 does not change, so the tension of the wire 30 fixed to the connecting member 25 does not change.

[0028] As mentioned above, when the contact portion 23 is pressed against the material to be driven and pushed upward, the switching means (in this embodiment, the internal lever 39 described later) enters a contact-on state, and the fastener can be driven in. Specifically, when the contact portion 23 is pressed against the material to be driven and slides, the movement of the contact portion 23 is transmitted to the switching means via the transmission unit (in this embodiment, the wire 30 described later), and the switching means enters a contact-on state, making the operating mechanism 15 operable. On the other hand, when the contact portion 23 is not pressed against the material to be driven (natural state), the switching means is in a contact-off state, and the operating mechanism 15 cannot operate. In this way, the switching means operates in conjunction with the contact portion 23, switching whether or not the operating mechanism 15 can operate.

[0029] The transmission unit that transmits the movement of the contact unit 23 to the switching means is composed of a flexible string-like member, as shown in Figure 4 and other figures. Specifically, the transmission unit in this embodiment is a metal wire 30. As shown in Figures 2 and 3, one end of this wire 30 is connected to the contact unit 23 (wire connection unit 25a), and as shown in Figure 4, the other end is connected to the reciprocating member 33 (described later). Furthermore, as shown in Figures 2 and 3, this wire 30 is inserted into the tube 31 and guided in a roughly U-shape to the side of the nose unit 22.

[0030] The tube 31 is a flexible tubular member. This tube 31 is flexibly attached to the nose portion 22 by a tube fixing device 31a located on the side of the nose portion 22. One end of the tube 31 abuts against the wire connection portion 25a, and the other end abuts against the adjustment screw 40 (described later). As a result, both ends of the tube 31 are held in place by the wire connection portion 25a and the adjustment screw 40. This tube 31 is covered by a cover member 29 that covers the side of the nose portion 22 so that it is not largely exposed when the tool is in use (see Figure 1). This cover member 29 restricts the movement of the wire 30 (for example, movement such as the tube 31 bulging outwards).

[0031] As described above, the wire 30 is guided in a roughly U-shape by the tube 31, extending downward from the contact portion 23 (wire connection portion 25a), then making a U-turn and extending upward. The wire 30 that extends upward is then changed direction again by the pulley 32 after exiting the tube 31, as shown in Figure 5, and extends downward. The end of the wire 30 that extends downward is fixed to a reciprocating member 33 that can reciprocate up and down. In this way, the wire 30 is folded twice in a roughly S-shape, and in a taut state, connects the contact portion 23 and the reciprocating member 33. With this configuration, when the contact portion 23 is pressed against the material to be driven and slides upward, tension acts on the wire 30, transmitting force and pulling the reciprocating member 33 upward (see Figures 7-9).

[0032] Figure 10 illustrates how the safety mechanism according to this embodiment operates as the reciprocating member 33 moves. As shown in this figure, the reciprocating member 33, the trigger pressing piece 34, and the internal lever 39 are arranged inside the housing near the trigger 20.

[0033] The trigger 20 is pivotably supported relative to the housing via a pivot shaft 20b located near its front end 20a. The front end 20a of the trigger 20 is biased upward by a trigger spring 37. As a result, in its natural state, the rear part of the trigger 20 (the part where the finger is placed) protrudes downward.

[0034] The reciprocating member 33 is a member supported within the housing so as to be able to reciprocate vertically. This reciprocating member 33 is biased downward by a spring 35 for the reciprocating member. As described above, the reciprocating member 33 is pulled upward when tension is applied to the wire 30. Through this action, the reciprocating member 33 can move upward against the biasing force of the spring 35 for the reciprocating member.

[0035] The trigger pressing piece 34 is a component that engages with the internal lever 39 (described later) when the contact portion 23 is pressed against the material to be driven, thereby enabling the operation of the trigger 20. This trigger pressing piece 34 is mounted so as to be vertically movable relative to the housing. This trigger pressing piece 34 is biased downward together with the reciprocating member 33 by the reciprocating member spring 35. Therefore, in its natural state, the trigger pressing piece 34 is pushed down to a position where it does not engage with the internal lever 39, as shown in Figure 10(a).

[0036] When the contact portion 23 is pressed against the material to be driven from this natural state, the reciprocating member 33 and the trigger pressing piece 34 slide upward against the biasing force of the reciprocating member spring 35, as shown in Figure 10(b). When the trigger pressing piece 34 is pushed upward, the pressing portion 34a of the trigger pressing piece 34, which is formed to protrude toward the trigger 20, acts to push the internal lever 39 upward.

[0037] The internal lever 39 is a lever that is pivotably mounted inside the trigger 20 via a lever pivot shaft 39a and is positioned to push the trigger valve stem 38. This internal lever 39 functions as a switching means of the present invention. This internal lever 39 is configured to be able to take on a contact-off state (see Figure 10(a)) in which the actuation mechanism 15 is not activated even when the trigger 20 is operated, and a contact-on state (see Figure 10(b)) in which the actuation mechanism 15 can be activated when the trigger 20 is operated. Specifically, even if the trigger 20 is operated in the contact-off state (see Figure 10(a)) in which the internal lever 39 is not pushed upward, the internal lever 39 cannot push the trigger valve stem 38 upward, so the actuation mechanism 15 will not be activated. On the other hand, when the trigger 20 is operated in the contact-on state with the internal lever 39 pushed upward (see Figure 10(b)), the internal lever 39 pushes the trigger valve stem 38 upward, as shown in Figure 10(c), so that the operating mechanism 15 is activated. Note that a known configuration can be used for the configuration in which the operating mechanism 15 is activated by pushing the trigger valve stem 38 upward.

[0038] With this configuration, when the contact portion 23 is pressed against the material to be driven and slides, tension acts on the wire 30, transmitting force and causing the reciprocating member 33 and trigger pressing piece 34 to move upward. This causes the trigger pressing piece 34 to push the internal lever 39 upward, putting the internal lever 39 (switching means) into a contact-on state. When the trigger 20 is operated in this contact-on state, the internal lever 39 pushes the trigger valve stem 38 upward, activating the operating mechanism 15. On the other hand, when the contact portion 23 is not pressed against the material to be driven, the internal lever 39 (switching means) is in a contact-off state, so even if the trigger 20 is operated, the trigger valve stem 38 will not be pushed upward. Therefore, even if the trigger 20 is operated without pressing the contact portion 23 against the material to be driven, the fastener will not be ejected, preventing unintended ejection of the fastener.

[0039] As described above, according to this embodiment, when the contact portion 23 is pressed against the material to be driven and slides, tension is applied to the transmission portion (wire 30), transmitting force and causing the switching means (internal lever 39) to enter a contact-on state. In other words, since the transmission portion only needs to transmit tension, it is possible to use a material with lower rigidity than conventional materials. Furthermore, even if the transmission portion is damaged or cut as a result of using a material with lower rigidity, the force will not be transmitted to the switching means and it will not enter a contact-on state, so safety will not be compromised.

[0040] In this way, by using materials with lower rigidity than conventional materials, the area around the nose section 22 can be made more compact. Furthermore, since contact arms made of sheet metal or similar materials are no longer required, the machine can be made lighter. Processing and dimensional control also become easier.

[0041] Furthermore, by using flexible materials such as string-like members for the transmission section, it becomes possible to position the transmission section along the machine. This increases the freedom of layout and reduces outward bulging, allowing for a more compact design around the nose section 22. In addition, its flexibility makes it less susceptible to deformation even when subjected to external forces.

[0042] In the above explanation, an example was given in which the internal lever 39 is used as a switching means to switch whether or not the operating mechanism 15 is operational. However, this is only one example, and other switching means may be used.

[0043] For example, a component that locks the operation of the trigger 20 may be used as the switching mechanism. That is, a switching mechanism may be provided that locks the trigger 20 so that it cannot swing in its natural state, and when the contact portion 23 is pressed against the material to be driven and slides, tension is applied to the wire 30 and force is transmitted, and this force releases the lock of the switching mechanism.

[0044] Alternatively, a microswitch may be used as a switching mechanism. For example, when the contact portion 23 is pressed against the material to be driven and slides, tension is applied to the wire 30, transmitting a force that presses down the microswitch. The operating mechanism 15 may then be electrically controlled so that it cannot operate unless the microswitch is pressed.

[0045] Furthermore, the device may be equipped with an adjustment mechanism to adjust the tension of the wire 30. By providing an adjustment mechanism, it becomes possible to adjust the timing of the switch from the contact-off state to the contact-on state. Also, even if the wire 30 stretches, it becomes possible to adjust the tension of the wire 30. For example, the tension of the wire 30 may be adjusted by an adjustment screw 40 as shown in Figure 11.

[0046] The adjustment screw 40 shown in Figure 11 is a hollow screw screwed into a through hole formed in the housing. A wire 30 is movably inserted through this adjustment screw 40. The lower end of the adjustment screw 40 is in contact with the tube 31, and is designed to press the tube 31 downwards.

[0047] With this configuration, as shown in Figure 11(a), when the adjustment screw 40 is turned downward, the tube 31 is pushed downward and bends. As the tube 31 bends, the path (outer) of the wire 30 becomes slightly longer, while the length of the wire 30 (inner) remains unchanged. Therefore, the wire 30 is pulled by the amount the path has become longer, and the reciprocating member 33 is lifted up (see G1).

[0048] On the other hand, as shown in Figure 11(b), turning the adjustment screw 40 in the opposite direction and moving it upward (see G2) eliminates the deflection of the tube 31, allowing the wire 30 to be loosened more than in the state shown in Figure 11(a) above. The reciprocating member 33 is pushed downward by the amount that the wire 30 is loosened.

[0049] Thus, the adjustment mechanism according to this embodiment allows the tension of the wire 30 to be adjusted by rotating the adjustment screw 40 to move it forward or backward.

[0050] Furthermore, a speed control mechanism 45 may be provided that expands or contracts the amount of movement of the contact portion 23 and transmits it to the switching means. By providing such a speed control mechanism 45, the amount of movement of the contact tip portion 24 and the amount of movement downstream of the transmission portion (the amount of movement of the reciprocating member 33) can be adjusted as needed.

[0051] Figure 12 shows an example of a gear shift mechanism 45. The gear shift mechanism 45 shown in Figure 12 comprises a rotating member 46 and a secondary wire 47.

[0052] The rotating member 46 is a component that replaces the pulley 32 in the above-described embodiment (Figures 1-11) and is rotatably mounted to the housing. This rotating member 46 has two types of circumferential grooves of different diameters. The smaller diameter groove is the small-diameter groove 46a, and the larger diameter groove is the large-diameter groove 46b. A wire 30 connected to the contact portion 23 is wound around the small-diameter groove 46a, and the end of the wound wire 30 is fixed to the rotating member 46. This configuration is such that when the contact portion 23 is pressed against the driving material and slides, tension acts on the wire 30, causing the rotating member 46 to rotate. On the other hand, a secondary wire 47 is wound around the large-diameter groove 46b. One end of the secondary wire 47 is fixed to the rotating member 46, and the other end is fixed to the reciprocating member 33. As a result, when the contact portion 23 is pressed against the material to be driven in and the rotating member 46 rotates, the secondary wire 47 is configured to pull up the reciprocating member 33 against the biasing force of the reciprocating member spring 35.

[0053] With this configuration, the difference in diameter between the small-diameter groove 46a and the large-diameter groove 46b increases the amount of movement of the contact portion 23 and transmits it to the reciprocating member 33. In this embodiment, when the amount of movement of the contact portion 23 is "S1", the amount of movement of the reciprocating member 33 is "S2", the radius of the small-diameter groove 46a is "R1", and the radius of the large-diameter groove 46b is "R2", the relationship "S1:S2=R1:R2" holds true.

[0054] In the example shown in Figure 12, the amount of movement of the contact portion 23 is increased and transmitted to the reciprocating member 33, but this is not limited to this configuration, and the amount of movement of the contact portion 23 may be decreased and transmitted to the reciprocating member 33. In this configuration, the wire 30 should be wound around the large-diameter groove 46b and the secondary wire 47 should be wound around the small-diameter groove 46a. Furthermore, the method for increasing or decreasing the amount of movement of the contact portion is not limited to the configuration shown in Figure 12, but well-known mechanisms such as gears and linkages can be used.

[0055] Furthermore, in the above-described embodiment, a wire 30 is used as the flexible string-like member, but the invention is not limited to this, and belts, chains, etc., may also be used as the transmission part. [Explanation of Symbols]

[0056] 10. Driving tools 11 Grips 11a Grip End 12 Output section 15 Operating mechanism 16 cylinders 17 Pistons 18 Drivers 19 Magazine 20 triggers 20a Front end 20b Oscillating axis 22 Nose section 22a Nose tip 23 Contact section 24 Contact tip 24a injection port 25 Connecting Members 25a Wire connection section 26 Adjustment Dial 27 Sliding guide 29 Cover component 30 Wire (transmission section) 31 Tubes 31a Tube fastener 32 Pulleys 33 Reciprocating member 34 Trigger Press Piece 34a Pressing part 35 Springs for reciprocating members 37 Trigger spring 38 Trigger valve stem 39 Internal lever (switching mechanism) 39a Lever pivot axis 40 Adjustment screws (adjustment mechanism) 45. Transmission 46 Rotating Member 46a Small diameter groove 46b Large diameter groove 47 Secondary wire

Claims

1. An output unit incorporating an operating mechanism that performs the fastening operation, A trigger is provided to be operable in order to activate the aforementioned operating mechanism, A nose section integrally provided at the tip of the output section, A contact portion is provided so as to be slidable relative to the nose portion without the need for a contact arm, and can be pressed against the material to be driven in. A switching means that switches whether or not the operating mechanism operates in conjunction with the contact portion, A transmission unit that transmits the movement of the contact unit to the switching means, Equipped with, The switching means is configured to be able to take on a contact-off state in which the operating mechanism is not activated even when the trigger is operated, and a contact-on state in which the operating mechanism can be activated when the trigger is operated. The transmission section is made of a flexible material, When the contact portion is pressed against the material to be driven and slides, tension acts on the transmission portion, transmitting force, and the switching means enters the contact-on state. Driving tool.

2. The transmission section is composed of a flexible string-like member. The driving tool according to claim 1.

3. The string-like member is equipped with an adjustment mechanism for adjusting the tension of the string-like member. The driving tool according to claim 2.

4. The nose portion is provided with a cover member that covers the side surface, The cover member is configured to restrict the movement of the transmission part so that it does not bulge outwards. The driving tool according to any one of claims 1 to 3.

5. The transmission mechanism includes a variable speed mechanism that expands or contracts the amount of movement of the contact portion and transmits it to the switching means. The driving tool according to any one of claims 1 to 4.

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