JPH0551576U - Locking device for nailer - Google Patents

Abstract

(57) [Abstract] [Purpose] With a simple structure and simple operation, it is possible to reliably prevent the trigger from tilting. In a nailing machine equipped with a trigger for operating a trigger valve for controlling a nailing operation, the nailing machine is installed so as to be retractable and tiltable with respect to a part of the nailing machine main body through a tilting support shaft. Then, the trigger is provided with a safety lever that moves up and down along the tilt support shaft in accordance with the tilt of the trigger, and the tilt support shaft and a portion that allows the safety lever to move up and down are prevented from moving up and down. It is possible to switch to the part.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a locking device for preventing a pulling tilt of a trigger for operating a trigger valve that controls a nailing operation in a nailing machine.

[0002]

[Prior Art]

 Conventionally, various lock devices of this type have been devised. For example, as shown in Japanese Utility Model Application Laid-Open No. S54-82989, a vertically moving contact arm and a trigger are connected to each other. Part of the contact arm is provided with a locking means for permitting or preventing the vertical movement of the arm, and this locking means forms a cross-shaped engagement groove on the contact arm side, and this engagement means is formed. A shaft-shaped locking member having an engaging piece that engages and disengages with the groove is provided so as to be rotatable and pushable, and the engaging piece engages with the engaging groove of the contact arm to move the contact arm upward. This contact arm prevents the trigger's retraction tilt, and the engagement piece of the locking member and the engagement groove's disengagement to allow the contact arm's upward movement to prevent the trigger's retraction tilt. Configured to allow, and As shown in HirakiAkira 52-118290 Patent Publication, even the have been devised directly to provide a stopper means to trigger or permit or prevent retraction tilting of the trigger.

[0003]

[Problems to be solved by the device]

 However, in the former case, when engaging the engaging piece of the engaging member with the engaging groove of the contact arm or releasing the engagement, the engaging member is pushed in the axial direction. It is necessary to perform a turning action and a turning action, which makes the operation complicated, and the number of members increases, which complicates the structure. In the latter case, since the stopper member is formed by using the inner surface of the trigger or the like, there is a problem in that it lacks certainty. Therefore, in view of the above-mentioned conventional problems, the present invention has an object to provide a locking device for a nailing machine, which has a simple structure and can reliably prevent the pull-in tilt of the trigger by a simple operation. Is.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a nailing machine having a trigger for activating a trigger valve for controlling a nailing operation, in which the trigger is tilted with respect to a part of the nailing machine body. It is installed so that it can be retracted and tilted via a shaft, and the trigger is equipped with a safety lever that moves up and down along the tilt support shaft as the trigger tilts, and the tilt support shaft allows vertical movement of the safety lever. The gist is that it is possible to switch between the part that operates and the part that blocks the vertical movement of the safety lever.

[0005]

[Action]

 According to the above configuration, the tilting support shaft is pivotally operated to switch to a portion that blocks the vertical movement of the safety lever to prevent the vertical movement of the safety lever, so that the trigger tilts with the tilting spindle as the fulcrum. To prevent the trigger valve from operating due to the trigger, and to rotate the tilt support shaft to switch to a position that allows vertical movement of the safety lever to move the safety lever up and down. By permitting, the trigger can be retracted and tilted with the same tilt support shaft as a fulcrum, and the operation of the trigger valve for the nail driving operation by the trigger is allowed.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the figure, the nailing machine 1 is roughly divided into a substantially cylindrical main body housing 3 which is reciprocated by air pressure and has a driver 2 for driving a nail, and a main body housing 3 which is orthogonal to the main body housing 3. The handle portion 4 is provided and has an air reservoir 4a formed therein, which is connected to an air supply source through an air hose (not shown), and is provided at the lower end of the main body housing 3 and A driver guide 6 in which a driver 2 is reciprocally inserted and a nail guide path 5 for accommodating a nail to be driven is formed, and one end of the driver guide 6 is in contact with the nail guide path 5 of the driver guide 6 and the other. The end portion is composed of a nail magazine 8 mounted on a bracket 7 protruding from one end of the handle portion 4.

A piston 9 provided with the driver 2 is reciprocally slidably incorporated in a cylinder portion 3a in the main body housing 3, and the piston is provided at a base portion between the main body housing 3 and the handle portion 4. A trigger valve 11 for controlling the supply of air from the inside of the air reservoir 4a to the inside of the cylinder 3a via the head valve 10 for reciprocating the chamber 9 is provided. An exhaust passage 12 for exhausting the used air in the cylinder portion 3a is formed in the main body housing 3 up to the vicinity of the handle portion 4, and an exhaust pipe 13 is provided in the handle portion 4 for the handle portion 4. Is provided along the longitudinal direction, one end of which communicates with the exhaust passage 12 and the other end of which extends rearward (right side in FIG. 1) of the handle portion 4. A cap-shaped exhaust cover 14 is rotatably mounted on the rear end portion (right side in FIG. 1) of the handle portion 4 via a sealing member such as an O-ring, and the exhaust cover 14 is provided on the outer periphery thereof. An exhaust port 15 is penetratingly provided and communicates with the other end of the exhaust pipe 13. The exhaust cover 14 is configured to change the exhaust direction by rotating the exhaust cover 14 with respect to the rear end of the handle portion 4 to arbitrarily select the direction (position) of the exhaust port 15. ..

The trigger 16 for opening and closing the trigger valve 11 is formed to have a substantially U-shaped cross section, and one end of the trigger 16 is integrally projected from the main body housing 3 as shown in FIG. The bracket 17 is supported by a tilting support shaft 18 so as to be retractable and tiltable (rotatable), and an auxiliary trigger 19 which is constantly in contact with the trigger valve 11 is tilted by a support pin 20 in an open upper part thereof. It is supported, and one end of this auxiliary trigger 19 is brought into contact with a stop pin 21 to prevent tilting in one direction. The tilt support shaft 18 is supported so as to be rotatable and axially slidable with respect to the bracket 17, and a flat shaft portion 22 for supporting a safety lever 29, which will be described later, is formed at a substantially central portion thereof. The part is projected from the bracket 17 and a rotary operation photograph 23 is provided, and the other end is also projected from the bracket 17 and the tilting support shaft 18 is provided between the end stop ring 24 and the bracket 17. A spring 25 for axially urging is mounted. On the inner surface of the rotating operation photograph 23, substantially triangular engaging protrusions 26 are bulged at two positions with a phase of 180 °, and a ring member 27 is attached to the bracket 17 side facing the protrusions. The member 27 is provided with four engaging recesses 28 each having a substantially triangular shape with which the engaging projections 26 are engaged and disengaged, at four intervals of about 90 °. Then, the tilting support shaft 18 is rotated by 90 ° by the turning operation photograph 23, and the engaging projection 26 thereof engages with the engaging recess 28, so that the flat shaft portion 2 of the tilting support shaft 18 is rotated. 2 is switched and displaced vertically (vertically) and horizontally (horizontally). The substantially inverted L-shaped safety lever 29 has an engaging hole 30 in which a circular hole portion 30a and a downwardly extending elongated hole portion 30b are connected to each other at a bent portion of the safety lever 29. It is supported by the flat shaft portion 22 of the tilt support shaft 18 so as to be slightly tiltable and vertically movable, and at the end portion of the substantially horizontal portion thereof, the trigger 16 is supported through a support hole 31 having a long hole extending in the lateral direction. On the other hand, it is supported by a support pin 32, and the lower end of the substantially vertical portion is connected to the upper end of a stopper member 36 described later. In the safety lever 29, the flat shaft portion 22 of the tilt support shaft 18 is prevented from being fitted into the long hole portion 30b of the engaging hole 30 when the flat shaft portion 22 is laterally (horizontally) positioned. , Its vertical movement is blocked. As a result, the trigger 16 is locked with respect to the safety lever 29 at the position of the tilt support shaft 18 and the support pin 32, and the pull-in tilt using the tilt support shaft 18 as a fulcrum is prevented. Further, the safety lever 29 is allowed to be fitted into the elongated hole portion 31b of the engaging hole 30 when the flat shaft portion 22 of the tilt support shaft 18 is positioned vertically (vertically). Therefore, its vertical movement is allowed. Therefore, the trigger 16 can be tilted while the safety lever 29 is moved upward along the flat shaft portion 22 of the tilt support shaft 16 via the support pin 32 and the support hole 31 with the tilt support shaft 18 as a fulcrum (allowance). ) Is done. The trigger 16 is always urged by the return spring 11a provided in the trigger valve 11 so that the trigger valve 11 and the auxiliary trigger 19 are in contact with each other. The return tilt is restricted by the stopper piece 16a formed on the tilt support shaft 18 side of the trigger 16 coming into contact with a part of the outer surface of the main body housing 3.

A nail accommodating path 33 is formed in the nail magazine 8, one of which communicates with the nail guide path 5 of the driver guide 6 and accommodates a group of nails to be driven which are continuously connected in a row. A pusher member 34 for pressing the rearmost portion of the nail group accommodated in the nail accommodating path 33 is mounted in the nail accommodating path 33 so as to be slidable in the accommodating direction of the nail group. The pusher member 34 is always urged by the spring 35 toward the nail guide path 5 side, and the recesses 5a, 5a formed in the nail guide path 5 in the driver guide 6 are formed in the upper and lower portions of the tip end surface thereof. The bulging portions 34a, 34a capable of being engaged with the bulge are bulged. The pusher member 34 is configured so as to push the nail group in the nail accommodating passage 33 into the nail guide passage 5 of the driver guide 6 by the urging force of the spring 35, and the last one. After the nail is driven, the bulging portions 34a, 34a of the pusher member 34 are fitted into the concave portions 5a, 5a of the nail guide path 5 and are located at the most forward end. The stopper member 36 is attached to the lower end of the substantially vertical portion of the safety lever 29 in a hanging shape, and the lower end portion of the stopper member 36 is in the sliding locus of the pusher member 34 in the nail magazine 8 before the trigger 16 is retracted and tilted. Facing. The stopper member 36 is allowed to move up and down with respect to the pusher member 34 when the nail group in the nail accommodating passage 33 is accommodated and the pusher member 34 presses the nail group S. When the trigger 16 can be retracted and tilted, and there is no nail in the nail accommodating passage 33 and the pusher member 34 is located at the most advanced end, it is engaged with the pusher member 34 to move up and down. Are blocked so that the retracting tilt of the trigger 16 is blocked.

A substantially L-shaped hook member 37 for hooking and holding the entire nail driving machine 1 on a belt or the like of an operator is mounted on the bracket 7 on which the nail magazine 8 is mounted. The hook member 37 is fastened with a bolt 38 in parallel with the horizontal piece 37a of the hook member 37. A hexagon wrench R for operating a nail driving depth adjusting screw in the driver guide 6 is detachably stored and held. A recessed storage portion 39 is formed.

Next, the operation of this embodiment configured as described above will be described. The nail group is accommodated in the nail accommodating path 33 of the nail magazine 8, and the pusher member 34 tilts the nail at the rear end, that is, at the last position, by the turning operation photograph 23. The flat shaft portion 22 of the support shaft 18 is set in a vertically oriented (vertical) state, that is, the flat shaft portion 22 is set in a state in which it can be fitted into the elongated hole portion 30b of the engagement hole 30 in the safety lever 29. Then, when the trigger 16 is pulled in and tilted, the safety lever 29 is pulled upward through the support hole 31 and the support pin 32 of the horizontal portion of the trigger 16 in accordance with the tilt of the trigger 16 in the direction of the arrow shown in the figure as a fulcrum. Therefore, the oblong hole portion 30b of the engaging hole 30 is moved upward with respect to the flat shaft portion 22 as a guide. Therefore, the trigger 16 is allowed to tilt and retract, and the auxiliary trigger 19 that is operated integrally with the trigger 16 can push the trigger valve 11 and can cope with a normal nailing operation. (See Figure 4). In this case, the stopper member 36 is moved upward together with the movement of the safety lever 29.

Then, when the rotary operation photograph 23 is rotated 90 ° from the above-mentioned state in order to set the flat shaft portion 22 of the tilt support shaft 18 to the sideways state by the rotary operation photograph 23, the flat shaft portion 22 is rotated. 22 shifts from the vertical (vertical) state to the horizontal (horizontal) state, and the flat shaft portion 22 prevents the engaging hole 30 of the safety lever 29 from being fitted into the long hole portion 30b. Even when the tilting support shaft 18 is used as a fulcrum to pull in and tilt, the flat shaft portion 22 cannot come into contact with the oblong hole portion 30b of the engaging hole 30 to be fitted therein, and the upward movement of the safety lever 29 is prevented. Therefore, the pulling and tilting of the trigger 16 is positively prevented, and the trigger valve 11 cannot be pushed by the auxiliary trigger 19 which is integrally operated (see FIG. 5). See). By preventing the pull-in tilt of the trigger 16, that is, by positively locking the trigger 16, when the nailing machine 1 is carried, the horizontal piece 37a of the hook member 37 is used to hook on the belt or the like of the operator. It prevents the outbursts when carrying. In this case, when the rotary operation photograph 23 is rotated, when the rotary operation photograph 23 is rotated, the engagement projection 26 is disengaged from the engagement concave portion 28 which has been engaged until now. When it is engaged with the next engagement concave portion 28, the mountain portion between them is run up and engaged with the next engagement recessed portion 28. The tilting support shaft 18 is returned to the axial direction by the urging force of the spring 25, and the engaging protrusion 26 is moved by the urging force of the spring 25. Is automatically engaged in the engaging recess 28. The engagement between the engagement protrusion 26 and the engagement recess 28 is always in an elastic engagement state by the urging force of the spring 25, and the engagement state is reliably maintained.

Further, the nailing operation is performed as described above, the last nail S in the nail accommodating path 33 is driven in, the pusher member 34 is positioned at the most forward end, and the bulges 34a and 34a thereof are driven by the driver guide. 6 is fitted into the recesses 5a, 5a of the nail guide path 5, the stopper member 36 and the pusher member 34, which are in a lower state, are engaged at this position to positively prevent the stopper member 36 from moving upward. To do. Therefore, in this state, the safety lever 29 is not moved upward in the same manner as described above, so that the retracting tilting of the trigger 16 is prevented, and the idle driving of the nail is prevented.

Next, another example of the present invention will be described with reference to FIGS. 7 and 8. This embodiment is a case in which the auxiliary trigger 19 related to the trigger 16 in the above-described embodiment is excluded, and is shown in FIG. As described above, the trigger 16A for opening and closing the trigger valve 11 is formed to have a substantially U-shaped cross section, and one end of the trigger 16A is substantially centered with respect to the bracket 17 integrally formed to project from the main body housing 3. It is supported by a tilt support shaft 18 having a flat shaft portion 22 so as to be retractable and tiltable (rotatable), and a safety lever 29A, which will be described later, faces the open upper portion thereof. The safety lever 29A is composed of a substantially inverted L-shaped guide member 40 and a lock member 41 depending on the substantially central portion of the guide member 40. The two vertical pieces 40a, 40a of the guide member 40 are substantially central portion. A supporting hole 42 having a long hole is formed in the vertical direction from the upper part to the lower part. Through the supporting hole 42, the tilting support shaft 18 is supported by substantially both ends thereof so as to be slightly tiltable and vertically movable, and a horizontal piece. 40b has its end supported on the trigger 16A by a cut-and-raised protrusion 43 formed on the trigger 16A, and also applies a biasing force to a spring for returning the trigger valve 11 to the trigger valve 11. Are always in contact with each other. The lock piece 41 hangs in parallel with the vertical pieces 40a, 40a of the guide piece 40, and an engagement hole having a shape in which a circular hole portion 44a and a downwardly extending long hole portion 44b are continuous in a substantially central portion thereof. 44 is formed and is supported by the flat shaft portion 22 of the tilt support shaft 18 through the engagement hole 44 so as to be slightly tiltable and vertically movable, and a stopper member 36 is provided on the bent piece at the lower end portion. It is hung in one piece. In the state where the flat shaft portion 22 of the tilt support shaft 18 is laterally (horizontally) positioned, the safety lever 29A moves the flat shaft portion 22 into the long hole portion 44b of the engaging hole 44 in the lock member 41. Since the insertion is blocked, its vertical movement is blocked. As a result, the trigger 16A is locked with respect to the safety lever 29A at the position of the tilt support shaft 18, and the pulling and tilting movement about the tilt support shaft 18 is prevented. Further, the safety lever 29A allows the flat shaft portion 22 of the tilt support shaft 18 to be fitted into the long hole portion 44b of the engaging hole 44 when the flat shaft portion 22 is positioned vertically (vertically). The vertical movement is allowed. As a result, the trigger 16A is capable of retracting and tilting while allowing the safety lever 29A to move up along the flat shaft portion 22 of the tilt support shaft 18 with the tilt support shaft 18 as a fulcrum. Since the rest of the configuration is the same as that of the above-described embodiment, the same members in the drawings are designated by the same reference numerals and the description thereof is omitted.

Therefore, in the present embodiment, the flat shaft portion 22 of the tilt support shaft 18 is set in the vertical (vertical) state by the rotary operation photographing 23, that is, the flat shaft portion 22 is a safety shaft. When the trigger 16A is retracted and tilted in a state in which it can be fitted into the elongated hole portion 44b of the engagement hole 44 of the lock member 41 of the ilever 29A, the trigger 16A is tilted in the direction of the arrow in the figure with the tilt support shaft 18 as a fulcrum. As a result, the entire safety lever 29A is cut and raised and is pulled up by the protrusion 43, so that the lock member 41 and the guide member 40 are integrated with the flat shaft portion 22 so that the elongated hole portion 44a of the engagement hole 44 and the support are supported. It is moved up using the hole 42 as a guide. Therefore, the trigger 16A is allowed to tilt and retract, and the trigger valve 11 can be pushed by the horizontal piece 40b of the guide member 40 in the safety lever 29A, which corresponds to a normal nail driving operation. is there. (See Figure 7)

Then, when the rotary operation photograph 23 is rotated 90 ° from the above-mentioned state in order to set the flat shaft portion 22 of the tilt support shaft 18 to the sideways state by the rotary operation photograph 23, the flat shaft portion 22 is rotated. 22 shifts from the vertical (vertical) state to the horizontal (horizontal) state, and the flat shaft portion 22 is prevented from being fitted into the long hole portion 44b of the engaging hole 44 in the lock member 41 of the safety lever 29A. Therefore, even when the trigger 16A is pulled in with the tilt support shaft 18 as a fulcrum and tilted, the flat shaft portion 22 cannot come into contact with the elongated hole portion 44b of the engagement hole 44 to be fitted therein, and the safety lever 29A as a whole. Movement is blocked. Therefore, even if the trigger 16A is pulled and tilted, the tilting is positively prevented by the horizontal piece 40b of the guide member 40 in which the cut-and-raised protruding piece 43 is in the locked state. It is something that cannot be pressed. That is, in this embodiment, since the tilting of the trigger 16A and the pushing operation of the trigger valve 11 associated with the release thereof are directly controlled by the safety lever 29A, the number of parts is reduced and the structure is simplified. Can be realized. The rest enjoys the same effects as the above-mentioned embodiment.

Further, in the above-described embodiment, the trigger 16A and the safety lever 29A are configured to support the horizontal piece 40b of the guide member 40 in the safety lever 29A by the cut-and-raised protrusion 43 formed on the trigger 16A. As shown in FIG. 9, the cut-and-raised protruding piece 43 is discharged, and the tongue piece 45 is integrally hung from a part of the lock member 41 in the safety lever 29A, and the tongue piece 45 is attached to the inner surface 46 of the trigger 16A. Alternatively, the safety lever 29A may be always opposed to each other in the contact state, and the safety lever 29A may be directly connected to the trigger 16A itself.

In the above-described embodiment, the structure is such that the safety levers 29, 29A and the stopper member 36 connected to the pusher member 34 for pressing the nail in the nail magazine 8 are connected. Alternatively, it may be configured to have a tip end portion that is pressed against the material to be driven and to be connected to a contact arm that is elastically supported so as to be vertically movable with respect to the main body of the nailing machine.

[0019]

[Effect of the device]

 As described in detail above, according to the present invention, the trigger is installed so as to be retractable and tiltable with respect to a part of the nailing machine main body through a tilting support shaft, and the trigger is tilted as the trigger tilts. Since a safety lever that moves up and down along the support shaft is installed, the tilt support shaft can be switched between a part that allows the safety lever to move up and down and a part that prevents the safety lever from moving up and down. It has an advantage that the pulling and tilting of the trigger can be reliably prevented by a simple structure and simple operation.

[Brief description of drawings]

FIG. 1 is a front view showing an entire nailing machine including partial breakage according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG.

FIG. 4 is an operation state diagram showing a relationship between a trigger and a safety lever.

FIG. 5 is an operation state diagram showing a relationship between the trigger and the safety lever.

6 is a sectional view taken along line C-C of FIG. 3, and b is D of a.
-D line sectional drawing.

FIG. 7 is an operation state diagram showing another example of the trigger and the safety lever.

8 is an enlarged cross-sectional view taken along the line EE of FIG.

FIG. 9 is an operation state diagram showing a mode in which a trigger and a safety lever are directly connected.

[Explanation of symbols]

 1 Nailer main body 11 Trigger valve 16 Trigger 18 Tilt support shaft 22 Flat shaft portion 29 Safety lever

Claims (1)

[Scope of utility model registration request] 1. A nailing machine equipped with a trigger for operating a trigger valve for controlling a nailing operation, wherein the trigger is retractable and tiltable with respect to a part of the nailing machine main body through a tilting support shaft. The safety lever is installed on the trigger and moves up and down along the tilt support shaft in accordance with the tilt of the trigger.The tilt support shaft and the safety lever are moved up and down to allow the safety lever to move up and down. A locking device in a nailing machine, which is characterized in that it can be switched to a blocking portion.