TW201431654A - Pneumatic nail gun - Google Patents

Abstract

This invention provides a pneumatic nail gun having a safety unit provided at the nail outlet and an auxiliary safety mechanism. The auxiliary safety mechanism comprises a safety stop member, a first elastic member and a control means. The safety stop member is movable between a first position and a second position to selectively stop the displacement stroke of the safety unit. The first elastic member provides elastic pre-stress for restoring the safety stop member back to the first position. The control means is used for controlling the displacement of the safety stop member. Accordingly, the control means has to be controlled to make the safety stop member not to stop the displacement stroke of the safety unit, so as to push the safety unit from the non-firing position to the firing position, thereby providing dual safety mechanism to prevent the pneumatic nail gun from being mistakenly fired.

Description

Pneumatic nail gun

The present invention relates to a pneumatic nail gun, and more particularly to a pneumatic nail gun having a double safety mechanism.

Pressing, the pneumatic pneumatic gun is connected to a compressed gas source and includes a nail gun body and a trigger disposed on the nail gun body. When the user pulls the trigger, the nail can be struck from the nailing opening of the nail gun body.

In order to prevent the user from accidentally hitting the trigger by accidentally hitting the nail, or avoiding the user using the pneumatic nail gun in an incorrect manner, a part of the pneumatic nail gun is provided with a safety unit at the nail opening of the nail gun body, the safety unit It can be displaced between a non-fired position and a to-be-fired position.

In the non-working condition, the safety unit protrudes from the nail opening and is in a non-fired position. At this time, the trigger of the pneumatic nail gun cannot be buckled, or the trigger can be buckled but the nail is not knocked out.

When the user pushes the nail opening to the working surface, the insurance unit can be pushed by the working surface to the position to be fired, and the user can pull the trigger to smoothly fire the nail.

However, the conventional pneumatic nail gun still has loopholes in safety. For example, when the aforementioned insurance unit accidentally abuts the body part of the user's hand, foot or the like, or other position that does not need to be nailed, the insurance unit moves to the waiting position. When the position is fired, the pneumatic nail gun still has the possibility of being accidentally hit, and such a problem really needs to be overcome.

TW I352652 discloses a pneumatically assisted auxiliary grip Pneumatic nail gun, which is used to control the conduction of high-pressure gas, so the user must simultaneously press the trigger of the pneumatic auxiliary auxiliary grip and the firing machine of the nail gun with both hands to successfully fire the nail.

However, the TW I352652 patent still has doubts about the safety that the control of the pneumatic auxiliary auxiliary grip is not interlocked with the aforementioned insurance unit, and the patent even suggests that the pneumatic nail gun does not need to be against the workpiece to perform the impact. The nailing operation, that is, when the user simultaneously presses the two triggers, the nail can be fired regardless of whether the pneumatic nail gun is against the surface to be constructed, and thus the design is difficult to achieve a high level of safety protection.

In view of this, the main object of the present invention is to provide a pneumatic nail gun having a double safety mechanism.

In order to achieve the above and other objects, the present invention provides a pneumatic nail gun that is connected to a source of compressed gas and includes a nail gun body, a first trigger is disposed on the nail gun body, and an auxiliary grip is from the nail gun body. Extending out, and an insurance unit is disposed on one of the nail gun body and can be displaced between a non-fired position and a to-be-fired position. The pneumatic nail gun further includes an auxiliary insurance mechanism, and the auxiliary insurance mechanism includes There is: a safety stop member movable between a first position and a second position to selectively block the displacement stroke of the safety unit; a first elastic member providing the safety stop Resetting the elastic preload to the first position; and a control means comprising a second trigger disposed on the auxiliary grip for controlling the displacement of the safety stop. When the user works with the second hand of the auxiliary grip When the trigger is triggered, the safety stop is controlled to be displaced. At this time, the safety unit can be displaced to the position to be fired, and the other hand of the user can effectively activate the first trigger.

With the above design, in addition to the insurance mechanism of the conventional pneumatic nail gun, the present invention can be freely moved by designing an auxiliary insurance mechanism so that the user must move the safety stop to the proper position. Otherwise, the insurance unit itself cannot enter the position to be fired, thereby avoiding the accidental firing of the pneumatic nail gun.

Referring to the first and second figures, in a first preferred embodiment of the present invention, a pneumatic nail gun has a nail gun body 1. A first trigger 2 is disposed on the nail gun body 1. A safety unit 3 is disposed on a nailing port 4, and an auxiliary securing mechanism 5, the pneumatic nailing gun body 1 is connected to a compressed gas source (for example, an air compressor, not shown), the safety unit 3 can be a displacement between a non-fired position and a to-be-fired position; when the fuse unit 3 is in the non-fired position, the first trigger 2 cannot be pulled, or the staple cannot be struck even if the first trigger 2 is pulled When the insurance unit 3 is located at the position to be fired, the first trigger 2 can be triggered to fire the staple; since the linkage mechanism between the first trigger 2 and the insurance unit 3 is not the creative focus of the present invention and belongs to the prior art The scope of this is not repeated here.

Referring to the first to fourth figures, the auxiliary insurance mechanism 5 includes a stopper pocket 10, a safety stopper 20, a first elastic member 30, and a control means for controlling the safety gear. The displacement of the stopper 20 includes a second passage 40, a stem receptacle 50, a valve stem 60 and a third passage 70.

The stopper receiving groove 10 is fastened to the nail gun body 1 and has a first passage 11 The stop member receiving groove 10 and the valve stem receiving groove 50 are connected to the stop member housing 10 and can be in a first position (as shown in the third and fourth figures) Deviating from a second position (as shown in FIGS. 5 and 6) to selectively block the displacement stroke of the fuse unit 3, defining a gap between the stopper pocket 10 and the safety stop 20 The pneumatic chamber 12 is in communication with the first passage 11; in the present embodiment, the safety unit 3 has a stop surface 6 that is selectively blocked by the safety stop 20 to restrict the movement of the fuse unit 3 from the non-fired position to the firing position.

The first elastic member 30 is disposed in the stopper pocket 10 and provides an elastic preload force for the safety stopper 20 to be displaced to the first position.

The second passage 40 is configured to be connected to the compressed gas source of the body 1 for guiding the compressed gas provided by the compressed gas source, that is, the second passage 40 is connected to the valve stem receptacle 50 and the nail gun. The body 1 is connected.

The valve stem receptacle 50 is in communication with the first passage 11 and the second passage 40. The valve stem 60 has a head 61 located in the stem receptacle 50 and is capable of being in a third position (eg, Displacement between the third and fourth positions) and a fourth position (as shown in Figures 5 and 6).

The third passage 70 is in communication with the first passage 11 and the outside.

As shown in the third and fourth figures, when the valve stem 60 is in the third position, the head 61 of the valve stem 60 is blocked between the first passage 11 and the second passage 40 so that the two are not connected to each other. When the safety stopper 20 is pushed by the first elastic member 30 to be displaced to the first position, thereby blocking the displacement stroke of the safety unit 3, even if the safety unit 3 is abutted, the stop surface 6 is The end of the safety stop 20 is blocked, so that the safety unit 3 cannot be moved from the non-fired position to the position to be fired; in addition, the first passage 11 and the third passage 70 are connected at this time, pneumatically The residual pressure in the chamber 12 can be vented via the third passage 70.

As shown in the fifth to seventh embodiments, when the valve stem 60 is in the fourth position, the first passage 11 and the second passage 40 are in communication, so that the compressed gas of the compressed gas source is sequentially passed through the second passage 40 and The first passage 11 enters the pneumatic chamber 12, and the compressed gas acts on a pushing surface 21 of the safety stop 20 to urge the safety stop 20 to the second position. At this time, the safety stop 20 Without stopping the displacement stroke of the fuse unit 3, the fuse unit 3 can be freely displaced between the non-fired position and the position to be fired; on the other hand, the head 61 of the valve stem 60 is also blocked in the first passage. Between 11 and the third passage 70, the air pressure in the pneumatic chamber 12 is prevented from leaking through the third passage 70.

Based on the foregoing design, the user must control the valve stem 60 with one hand, and then push the nailing opening 4 against a working surface to push the safety unit 3 to the position to be fired, so that the pneumatic nail gun is in a state to be fired, and then The first trigger 2 is pulled by the other hand, and the nail can be fired; these double insurance mechanisms ensure that the user can only fire the nail when the pneumatic nail gun is simultaneously operated by both hands and the insurance unit is pushed to the position to be fired. In order to greatly avoid the possibility of the nail being accidentally hit.

In the preferred embodiment, an auxiliary gripper 80 extends from the nail gun body 1 and is coupled to the valve stem pocket 50, and the control means of the auxiliary safety mechanism 5 further has a second trigger 90 pivoted to the auxiliary The grip 80 and a pair of connecting rods 100 are controlled by the second trigger 90. The dual link set 100 has a first connecting rod 101 and a second connecting rod 102, and the first connecting rod 101 can be connected to the first connecting rod 101 The second trigger 90 is coaxially disposed on the auxiliary grip 80, and the second link 102 is pivoted between the first link 101 and the valve stem 60; thus, the user can press the second trigger 90, The double link set 100 is caused to push the valve stem 60 to be displaced. Further, the auxiliary grip 80 is inside The valve stem 60 is disposed. The second trigger 90 drives the valve stem 60 to open or close the compressed air source of the body, and controls the compressed gas source to pass through the first passage 11, thereby controlling the safety stop 20 to be actuated. In the first position or the second position.

In order to make the displacement of the valve stem 60 smooth, the control means of the auxiliary safety mechanism 5 may further include a guiding rod 110 having a pivoting end 62 and a pivoting hole 63 disposed at the pivoting end 62. The two connecting rods 102 have a pair of connecting ends 103 pivotally connected to the pivoting end 62 and a pair of connecting holes 104 are disposed at the mating end 103. The auxiliary gripping 80 has a receiving slot 81 for receiving the pivoting end of the valve stem 60. 62 and a long slot 82 are connected to the slot 81. The guide rod 110 is disposed in the pivot hole 63 and the docking hole 104 and partially protrudes into the slot 82, whereby the guide rod 110 can be along the length The slot 82 is displaced and the ram guide stem 60 is smoothly displaced between the third and fourth positions.

In addition, the control means of the auxiliary insurance mechanism 5 may further include a valve block 120 disposed on the valve stem receptacle 50. The valve block 120 has a consistent hole 121, a ring groove 122 corresponding to the first passage 11 and a plurality of openings The hole 123 is connected between the through hole 121 and the annular groove 122. The two ends of the through hole 121 communicate with the second passage 40 and the third passage 70 respectively. The head 61 of the valve stem 60 is displaceably disposed through The through hole 121, and the inner and outer surfaces of the valve block 120 may be provided with a plurality of sealing rings to improve airtightness.

On the other hand, in order to facilitate the resetting of the valve stem 60, the control means of the auxiliary safety mechanism 5 of the preferred embodiment further includes a second elastic member 130. The second elastic member 130 is disposed in the auxiliary grip 80 for use. An elastic preload that resets the valve stem 60 to the third position is provided.

Referring to the eighth to eleventh drawings, a second preferred embodiment of the present invention provides a pneumatic nail gun similar to the foregoing embodiment, that is, the auxiliary insurance mechanism of the present embodiment. 5a also includes a stopper pocket 10a, a safety stop 20a, a first elastic member 30a and a control means. The control means also includes a second passage 40a, a valve stem receptacle 50a and a valve stem. 60a and other components, and when the user does not apply the control valve stem 60a, the safety stop 20a will block the stroke of the safety unit 3a; the main difference between the first and second preferred embodiments is that the two valves The lever 60, 60a is operated in the opposite direction, and the second elastic member 130a of the embodiment is used to provide the elastic pre-force of the valve stem 60a to the fourth position, and the second elastic member of the first preferred embodiment. The 130 series is used to provide a different elastic preload for the valve stem 60 to be reset to the third position.

As shown in the thirteenth and fourteenthth views, when the valve stem 60a is moved by the user (in the present embodiment, also by pressing the second trigger 90a) to move to the third position, the head of the valve stem 60a The portion 61a is blocked between the first passage 11a and the second passage 40a, so that the compressed gas cannot enter the pneumatic chamber 12a, and the safety stopper 20a is pushed by the first elastic member 30a to be displaced to the first position; In a preferred embodiment, when the safety stop 20a of the embodiment is in the first position, the displacement stroke of the safety unit 3a is not blocked, so that it can be freely between the non-fired position and the position to be fired. mobile.

As shown in the tenth to twelfth drawings, when the valve stem 60a is pushed by the second elastic member 130a to be reset to the fourth position, the first passage 11a and the second passage 40a are in communication, and the compressed gas can pass through the first A passage 11a enters the pneumatic chamber 12a to urge the safety stop 20a to the second position; unlike the first preferred embodiment, when the safety stop 20a of the embodiment is in the second position, the safety unit The displacement stroke of 3a is blocked by the end of the safety stop 20a, so that it cannot be moved from the non-fired position to the position to be fired, thereby achieving a double safety mechanism.

It should be noted that in other possible embodiments of the present invention, the user may also use other control means to control the valve stem, for example, the free end of the valve stem is exposed to the outside, and the user can directly press the valve stem. Control. In other possible embodiments of the present invention, the third passage may also be omitted, and the residual pressure of the pneumatic chamber may be vented in other ways, such as directly setting other pressure relief valves or pressure relief passages in the pneumatic chamber, and using appropriate methods. It can also be controlled.

In addition, in the above two preferred embodiments, the control means controls whether the high pressure gas pushes the safety stop by displace the valve stem, that is, it is a pneumatic control means, but the control means of the present invention It also includes purely mechanical controls.

Referring to the fifteenth figure, the pneumatic nail gun provided by the third preferred embodiment of the present invention is different in structure from the foregoing two embodiments in that the pneumatic control means in the foregoing two embodiments are changed to purely mechanical type. Control means, and the safety stop 140 is pivotally disposed on the nail gun body 150 and is displaceable between a first position (as shown in FIG. 15) and a second position (as shown in FIG. 16). The safety stop 140 has a stop end 141 and a control end 142 respectively located on opposite sides of the pivot 143. The control device of the embodiment includes an auxiliary grip 160 connected to the nail gun body 150 and a second trigger. 170 is pivoted between the auxiliary grip 160 and a cable 180 connected between the second trigger 170 and the safety stop 140.

As shown in the fifteenth figure, when the user does not press the second trigger 170, the control end 142 of the safety stop 140 is pushed by the first elastic member 190 to be in the first position, and the stop of the safety stop 140 is at this time. The stop end 141 is blocked from the displacement stroke of the fuse unit 200, so that the fuse unit 200 cannot be moved from the non-fired position to the position to be fired, and the control end 142 can be provided in conjunction with the second trigger 170.

As shown in FIG. 16 , when the user presses the second trigger 170 , the cable 180 is pulled by the second trigger 170 and drives the control end 142 to move, so that the safety stop 140 pivots to the second position. The stop end 141 of the safety stop 140 is not displaced from the displacement stroke of the fuse unit 200, so that the fuse unit 200 can freely move to the position to be fired when it abuts against the work surface.

The advantages of these mechanical control means are that the arrangement of the gas flow path can be reduced, the gas loss is small, and it is suitable for continuous firing operations, and is convenient for installation and maintenance. It should be noted that the mechanical control means is not limited to the one shown in the third preferred embodiment. For example, the second trigger may be changed to a lever, a knob, etc., and the cable may also be a link group, The gear set, the transmission chain and other transmission mechanisms are replaced, and the mechanical control means does not necessarily need to be matched with the swingable safety stop, that is, the safety stop can be changed to be linearly displaced to the nail The gun body is suitable and controlled by the mechanical control means.

On the other hand, in order to make the pneumatic nail gun of the present invention meet the habits and ergonomic requirements of the user, in the foregoing three embodiments, the long axis of the nail gun body is in the first direction (for example, the X-axis direction). The long axis of the auxiliary grip is a second direction (for example, the Y axis), and the displacement stroke of the fuse unit is a third direction (for example, the Z axis), and the first, second, and third directions are perpendicular to each other. The user can hold the operation. Of course, in other possible implementations, the directions may not be perpendicular to each other.

Finally, it should be noted that the constituent elements disclosed in the foregoing embodiments are merely illustrative and are not intended to limit the scope of the present invention. Alternatives or variations of other equivalent elements should also be applied for in this case. Covered by the scope.

1‧‧‧nail gun body

2‧‧‧First trigger

3, 3a‧‧‧ insurance unit

4‧‧‧ nail opening

5, 5a‧‧‧Auxiliary insurance institutions

6‧‧‧stop surface

10, 10a‧‧‧stops

11, 11a‧‧‧ first channel

12, 12a‧‧‧ pneumatic chamber

20, 20a‧‧‧ insurance stop

21‧‧‧

30, 30a‧‧‧ first elastic parts

40, 40a‧‧‧ second channel

50, 50a‧‧‧Valve pocket

60, 60a‧‧‧ valve stem

61, 61a‧‧‧ head

62‧‧‧ pivot end

63‧‧‧Pivot hole

70‧‧‧ third channel

90, 90a‧‧‧second trigger

100‧‧‧Double-link set

101‧‧‧ first link

102‧‧‧second connecting rod

103‧‧‧Docking end

104‧‧‧ docking holes

110‧‧‧guides

120‧‧‧Valve block

121‧‧‧through holes

122‧‧‧ Ring groove

123‧‧‧Opening

130, 130a‧‧‧Second elastic parts

140‧‧‧Safety stop

141‧‧‧stop end

142‧‧‧Control end

143‧‧‧ pivot

150‧‧‧nail gun body

160‧‧‧Auxiliary grip

170‧‧‧Second trigger

80‧‧‧Auxiliary grip

81‧‧‧ 容容

82‧‧‧Long slot

180‧‧‧Steel cable

190‧‧‧First elastic parts

200‧‧‧ insurance unit

The first figure is a perspective view of a first preferred embodiment of the present invention.

The second drawing is an exploded view of a first preferred embodiment of the present invention.

The third figure is a cross-sectional view of A-A of the first figure, wherein the valve stem is in the third position.

The fourth figure is a B-B cross-sectional view of the first figure in which the valve stem is in the third position.

The fifth figure is a cross-sectional view similar to the third figure in which the valve stem is in the fourth position.

The sixth figure is a cross-sectional view similar to the fourth figure in which the valve stem is in the fourth position.

The seventh figure is a partial enlarged view of the sixth figure.

Figure 8 is a perspective view of a second preferred embodiment of the present invention.

The ninth drawing is an exploded view of a second preferred embodiment of the present invention.

The tenth figure is a cross-sectional view taken along line A-A of the eighth figure, in which the valve stem is in the fourth position.

Figure 11 is a cross-sectional view taken along line B-B of the ninth diagram, wherein the valve stem is in the fourth position.

The twelfth figure is a partial enlarged view of the eleventh figure.

The thirteenth diagram is a cross-sectional view similar to the tenth diagram in which the valve stem is in the third position.

Figure 14 is a cross-sectional view similar to the eleventh figure in which the valve stem is in the third position.

Figure 15 is a perspective view of a third preferred embodiment of the present invention, wherein the fuse The stop is in the first position.

Figure 16 is another perspective view of a third preferred embodiment of the present invention wherein the safety stop is in the second position.

1‧‧‧nail gun body

2‧‧‧First trigger

3‧‧‧ Insurance unit

4‧‧‧ nail opening

5‧‧‧Auxiliary insurance institutions

6‧‧‧stop surface

20‧‧‧Safety stop

30‧‧‧First elastic parts

50‧‧‧Valve pocket

60‧‧‧ valve stem

61‧‧‧ head

62‧‧‧ pivot end

63‧‧‧Pivot hole

80‧‧‧Auxiliary grip

82‧‧‧Long slot

90‧‧‧Second trigger

100‧‧‧Double-link set

101‧‧‧ first link

102‧‧‧second connecting rod

103‧‧‧Docking end

104‧‧‧ docking holes

110‧‧‧guides

120‧‧‧Valve block

121‧‧‧through holes

130‧‧‧Second elastic parts

Claims (17)

A pneumatic nail gun is connected to a compressed gas source and includes a nail gun body, a first trigger is disposed on the nail gun body, an auxiliary grip extends from the nail gun body, and a safety unit is disposed on the nail One of the gun body has a nail opening and is displaceable between a non-fired position and a to-be-fired position. The pneumatic nail gun further includes an auxiliary insurance mechanism, and the auxiliary insurance mechanism includes: a second trigger. Provided on the auxiliary gripper; and a safety stop member disposed on the nail gun body and capable of being selectively moved by a movement between the first position and a second position by the second trigger operation control a displacement stroke of the safety unit; wherein the user can operate the second trigger to control the displacement of the safety stop, so that the safety unit can be displaced to the position to be fired, and the user can operate the other hand The first trigger is effectively actuated. The pneumatic nail gun of claim 1, wherein the auxiliary securing mechanism comprises a first elastic member that abuts against the safety stop and provides an elastic preload for the safety stop to return to a first position. The pneumatic nail gun of claim 1, wherein the auxiliary safety mechanism has a second passage communicating with the nail gun body with a compressed gas source, the auxiliary grip having a valve stem, the second trigger driving the valve stem to be opened Or closing the compressed air source of the body and controlling the safety stop to act in the first position or the second position. The pneumatic nail gun of claim 3, wherein the auxiliary safety mechanism further comprises a stopper receiving groove, wherein the safety stopping member is movably disposed in the stopping member receiving groove; a valve stem receiving groove, The valve stem is movably disposed in the valve stem pocket; and a first passage is connected to the stopper pocket and the stem pocket; and the second trigger is linked The valve stem allows the source of compressed gas to control the movement of the stop member through the first passage. The pneumatic nail gun of claim 4, wherein the auxiliary safety mechanism comprises a pneumatic chamber defined between the stop pocket and the safety stop, and is connected to the first passage; wherein The valve stem has a head located in the stem cavity and is displaceable between a third position and a fourth position, and the valve stem is driven by the second trigger; wherein, when the valve stem is located in the third In position, the head of the valve stem is blocked between the first passage and the second passage, and the safety stop is pushed by the first elastic member to be displaced to the first position; wherein, when the valve stem is located at the fourth position In the position, the first passage is in communication with the second passage, and the compressed gas of the compressed gas source enters the pneumatic chamber via the first passage to push the safety stop to the second position. The pneumatic nail gun of claim 3, wherein when the safety stop is in the first position, the end of the safety stop is blocked from the displacement stroke of the safety unit, when the safety stop is located In the second position, the displacement stroke of the fuse unit is not blocked. The pneumatic nail gun of claim 6, wherein the auxiliary safety mechanism further comprises a second elastic member for providing an elastic preload of the valve stem to the third position. The pneumatic nail gun of claim 3, wherein when the safety stop is in the second position, the end of the safety stop is blocked from the displacement stroke of the safety unit, when the safety stop is located In the first position, the displacement stroke of the fuse unit is not blocked. The pneumatic nail gun of claim 8, wherein the auxiliary safety mechanism further comprises a second elastic member for providing an elastic preload of the valve stem to the fourth position. The pneumatic nail gun of claim 3, wherein the auxiliary safety mechanism further comprises a double link set controlled by the second trigger, the double link set having a first link pivoted to the auxiliary grip and a The second link is pivoted between the first link and the valve stem. The pneumatic nail gun of claim 3, wherein the second passage of the auxiliary safety mechanism is connected to the valve stem receptacle to communicate with the nail gun body. The pneumatic nail gun of claim 3, wherein the long axial direction of the nail gun body is a first direction, the long axial direction of the auxiliary grip is a second direction, and the displacement stroke of the safety unit is a third direction. The first, second and third directions are perpendicular to each other. The pneumatic nail gun of any one of claims 4 to 9, wherein the auxiliary safety mechanism further comprises a third passage communicating between the first passage and the outside; wherein when the valve stem is in the fourth position The head of the valve stem is blocked between the first passage and the third passage; wherein, when the valve stem is in the third position, the first passage is in communication with the third passage. The pneumatic nail gun of any one of claims 4 to 9, wherein the auxiliary safety mechanism further comprises a valve block disposed on the valve stem receptacle, the valve block having a consistent hole, and a ring groove corresponding to the first passage And a plurality of openings are connected between the through hole and the ring groove. The two ends of the through hole respectively communicate with the second channel and the third channel, and the head of the valve stem is displaceably disposed through the through hole. The pneumatic nail gun of claim 1, wherein the safety stop has a stop end to block the stroke of the fuse unit, and the opposite end is a control end to provide a connection with the second trigger. The pneumatic nail gun of claim 1, wherein the auxiliary safety mechanism further comprises a transmission mechanism connected between the second trigger and the safety stop. The pneumatic nail gun of claim 15, wherein the long axial direction of the nail gun body is a first direction, the long axial direction of the auxiliary grip is a second direction, and the displacement stroke of the safety unit is a third direction. The first, second and third directions are perpendicular to each other