JPS61257786A - Box nailing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Field of Industrial Application The present invention relates to a nailing machine, and more particularly to an automatic nailing machine that can continuously drive nails using an IJ knob. Regarding machines.

2. Description of the Related Art Nailers capable of continuously driving nails using needle holding strips that hold nails at regular intervals are well known and are widely used in the construction industry and the like. These nailers are known, for example, from U.S. Patent No. 3.5.
As disclosed in I'2003, there is a nail feeding mechanism that guides a needle holding strip to feed the nails one by one into the driving part of the nose, and a nail feeding mechanism that guides the needle holding strip to feed the nails one by one into the driving part of the nose, and a mechanism that allows the nails in the driving part of the nose to pass through the tip of the nose by pulling a trigger. In addition to the nail driving mechanism that drives the nail into the object, a safety mechanism is provided that moves back and activates the trigger only when the tip of the nose is pressed against the object at a predetermined position. To be safe, do not drive the nail in unless the nose is in the correct position.

This safety mechanism allows the user of the nail gun to use two consecutive shots, one of which is called a touch trip, where the tip of the nose is held in place by holding down the trigger and pressing K. If the trigger is locked in a pulled state with a force-driven nail device, the user only has to press the nail gun into a predetermined position. The other method involves pressing the nose of the nail gun into a predetermined position and then pulling the trigger, which is called a trigger trip.

Although this method is more troublesome than touch tripping because it requires λ operations, it has the advantage of guaranteeing accuracy of driving. Therefore, either method is used depending on the situation.

Problems to be Solved by the Invention The above-mentioned nail gun sometimes performs double nailing. This cannot be completely eliminated even with a trigger trip. If double driving occurs, not only will the nail be driven into the target object incorrectly, but it will also cause jamming of the nail at the nose, which will have a negative impact on the next nail driving operation. give. When we researched this double-driving mechanism, we found that when the blade of the nail-driving mechanism rapidly moves forward and drives the nail, the nail-driving machine moves backwards as a whole due to the reaction, and the safety mechanism returns to the front and then returns again. I realized that this was because I was immediately forced into it.

In other words, the reaction causes an unwanted touch trip operation. This type of double-driving often occurs in nailers with short stroke safety mechanisms.

Therefore, an object of the present invention is to provide a nailing machine that can reliably avoid double driving.

Means for Solving the Problems In order to achieve the above object, a nail gun according to the present invention includes a hook member mounted to pivot together with the trigger, a pin mounted on a safety mechanism at a position adjacent to the hook member. Furthermore, this pin is in a position where it comes into contact with the tip of the hook member to prevent the safety mechanism from retreating when the trigger is pulled without pressing the nose tip against the object, and the pin is in a position to prevent the safety mechanism from retreating. When the pressing safety mechanism is retracted and the trigger is pulled, the stone is held in the hook part of the hook member and is in a position to prevent the safety mechanism from returning. These features prohibit the touch trip operation and prevent the safety mechanism from returning after the trigger is pulled, thereby reliably eliminating double strikes due to recoil during driving.

Further, according to the present invention, the hook member is attached to rotate together with the trigger, and the pin is attached to the safety mechanism at a position adjacent to the hook member, and the pin is configured to press the tip of the nose against the object. When the safety mechanism is retreated and the trigger is pulled, the pin is held by the hook portion of the hook member and is in a position to prevent the safety mechanism from returning, and the pin is in a position that prevents the safety mechanism from returning when the trigger is pulled without pressing the tip of the nose against the object. A nail gun is provided which is characterized in that the hook member is in a laterally pushing abutment position between the hook portion and the tip of the hook member to enable retraction of the safety mechanism. This nailing machine allows touch-trip driving, but once a single nail is driven, the safety member does not return unless the trigger is released, and double driving is reliably prevented.

In the present invention, the above-mentioned λ hook members are respectively provided on the side of the trigger, and a pin is used to select one of the hook members to cooperate with the other, so that each function can be exerted, thereby preventing a double-driving malfunction. It can be prevented.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings. Before explaining the present invention in detail, the general structure and operation of the nail gun according to the present invention will be briefly explained using FIGS. 1 to 3. The nail gun 1 has a main body equipped with a lower handle 2 and an upper cylinder 8, and guides needle holding strips 5 holding nails at equal intervals to drive nails 4 into the driving portion of a nose 6 one by one. By pulling the nail feed mechanism 7 and the trigger 8 pivoted on the handle 2, the trigger valve 9 is operated to send compressed air into the cylinder 8, which drives the piston (not shown) in the cylinder forward. The blade 10 connected to the piston is rapidly moved forward to drive the nail in the driving part of the nose 6 from the tip 11 of the nose into the object. The nail feeding mechanism 7 is operated in conjunction with the trigger operation, and when a nail is driven from the nail driving part and the trigger valve 9 returns to its normal state, the next nail is fed using the feed hole 12 of the IJ knob 5. into the driving part of the nose 6.

Such a nailing machine capable of continuous driving is provided with a safety mechanism 13 that prevents nails from flying out even if the trigger is pulled when the nailing machine is not applied to an object. This safety mechanism 18 extends from the nose tip 11 to the trigger 8, and retreats to enable the operation of the trigger 8 only when the nose tip is pressed against an object.

For more information, see Safety If! R@18 is pivotally supported by a cylindrical body 14 that covers the tip of the nose, a link member 15 that extends from this cylindrical body to the trigger 8, and a rear end of the link member 15 that extends into the trigger, and acts on the piston 16 of the trigger valve 9. The spring 18 is provided between the nose 6 and the cylindrical body 14 and always biases the cylindrical body 14 forward. Even when the trigger 8 is pulled, the piston 16 of the trigger valve 9 is not pushed. However, when the nose tip 11 is pressed against an object, it moves rearward against the cylindrical body 14 and the spring 18, and the pivot point 19 of the lever 17 also moves rearward via the link 15. Therefore, as shown in FIG. 3, when the trigger 8 is pulled, the lever 17 pushes the piston 16, the trigger valve 9 operates, and the blade 10 rapidly moves forward.

The above is a general description of the known parts of the nailing machine according to the present invention, and more details can be found in US Pat. Please refer to No. 4t'1003 on the left.

Seven features of the present invention will be explained below.

As best shown in FIG. 2, a first hook member 21 and a λth hook member 22 are attached to the side surfaces of the trigger 8, respectively. These hook members are used selectively and each functions independently.
Although they have the same effect in terms of avoiding the influence of recoil when driving the safety mechanism 18, they have slightly different effects in terms of the driving method, and only one of them may be used as necessary.

The first hook member 21 is also shown in FIG. 3 and is pivotally supported by a pivot pin 28 of the trigger 8, and is fixed to the trigger 8 by a pin 24 or the like so as to interlock with the trigger 8. . The first hook member 21 is made of a somewhat thick and rigid plate-like member), and a hook 25 is formed near its tip, and its tip surface 26 is made somewhat short.

The second hook member z2 is also shown in FIG.
etc., is fixed to the trigger 8. The second hook member 22 is made of a slightly thin plate-like body with spring elasticity, and has a hook 28 formed near its tip, which extends longer forward than the first hook member 21, and has a recess at the lower end of the tip 29. A guide 30 is formed.

These hook members 21. , 22, a pin 32 is attached to the link 15 of the safety mechanism. More specifically, the link 15 of the safety @ structure hangs downward near the hooks 25°28 of both hook members 21 and 22,
A U-shaped bracket 88 is formed here. This bracket 88 extends integrally from the link 15, but for the purpose of maintaining strength, a pin 8 is attached to the main body.
4 is supported. And the hole 8 that receives this pin 84! S and R6 are formed into elongated holes to allow movement of the link 15.

A rod-shaped pin 82 is attached to the bracket 8B so as to be movable in the lateral direction of the nailer. The length of this pin 82 as a whole is equal to the hook 25 of the first hook member 21.
The distance between the hook 28 of the second hook member 22 and the hook 28 of the second hook member 22 is smaller than the distance between the hook 28 and the hook 28 of the second hook member 22, and the lateral movement distance of the pin is such that it can protrude outward from each hook member. It is being done. Therefore, the pin 82
Either the hook member 21 or the second hook member 22 is adapted to selectively cooperate with the lateral movement thereof. As is clear from FIG. 7, it is also possible to select a position that does not cooperate with either of the hook members.

One end 88 of the pin 82 cooperates with the first hook member 21, and the other end 89 cooperates with the second hook member z2. pin 8
The position of one end 88 of z is such that when the trigger 8 is pulled without pressing the nose tip 11 against the object (the chain line position in FIG. 3), it comes into contact with the tip 26 of the first hook member 21 and becomes a link of the safety mechanism 18. 15, and when the tip of the nose 11 is pressed against the object, the link 15 of the safety mechanism $18 is retreated, and the trigger ft-8 is pulled (dotted line position vt in Fig. S). Hook 25 of first hook member 21
The safety member 18 is held in a position that prevents the safety member 18 from returning.

In addition, when the other end 89 of the pin 82 is in a position where it cooperates with the second hook member 22, the nose tip 11 is pressed against the object, the safety mechanism 1B is retreated, and the trigger 8 is pulled (see FIG. position), the hook z8 of the second hook member 22
The other end 89 of the pin 82 is held in a position that prevents the safety mechanism from returning, and the other end 89 of the pin 82 is in the position where the trigger is pulled without pressing the nose tip 11 against the object (the chain line position in Fig. 1). It is located at a position where the hook z8 of the two-hook member 22 and the tip 29 abut against each other so as to push it sideways, and is located at a position that allows the link 15 of the safety mechanism 18 to retreat. In order to satisfy these fllrIA requirements, the second hook member 22 is formed to be slightly longer from the hook to the tip than the first hook member 21. Further, the second hook member 2z has spring elasticity and is formed to be able to be deflected laterally.

2, 6, and 7 regarding the movement of the pin 82 to a position in which it cooperates with the first hook member 21, the second hook member 22, or a position in which it does not cooperate with either of them. sea bream. That is, in FIG. 2, the pin 82 is
6 shows a position where the pin 82 cooperates with the second hook member 22, and FIG. 7 shows a position where the pin 82 does not cooperate with both hook members. It shows. In this way, the pin 8z can take various positions, but it needs to be fixed at these positions. For this purpose, circumferential grooves 40 are formed on the outer periphery of the pin 82 at three locations in the longitudinal direction, and a spring-biased lock lever 41 extends downward in the bracket 88 . are arranged to mate with each other. Therefore, to change the lateral position of the pin 8z, pull the lever 41 to the left in the drawing to disengage it from one circumferential groove 40, move the pin 82, and move the lever 41 to the other circumferential groove 40. All you have to do is make them fit.

The operation of the nailing machine of the present invention having the above configuration will be explained.

First, the case where the pin 32 is in a position where it cooperates with the first hook member 21 will be described. Please refer to Figures 2, 3, and 5 for the drawings. As shown in the second frame, the pin 82 is moved to a position where its tip 88 protrudes laterally from the first hook member 21, and the lock lever 41 that fixes it in this position is fitted into the groove 40 of the pin 8z. are doing. When the trigger 8 is pulled in this state, the first hook member 21 turns together with the trigger 8 and moves to a position where its tip 26 abuts the tip 88 of the pin 82, as shown by the chain line in FIG. In this state, even if the nose tip 11 is pressed against the object, the link 15 of the safety mechanism cannot retreat because the pin 8z is brought into contact with the first hook member 21. In other words, a touch-trip hitting operation in which the tip of the nose is pressed against an object while the trigger is held is prohibited.

Therefore, the first hook member 21 functions to perform only a trigger (IJ) tapping operation. Regarding this trigger trip operation, please refer to the second figure. Tori, f
Before pulling -8, the tip of the nose is pressed against the object,
The cylindrical body 14 and link 15 of the safety e-cell IB are sent later. When the trigger 8 is pulled in this state, the first hook member 21 is rotated to the position shown by the chain line, and the hook 25
holds the tip 88 of the pin 82. Therefore, trigger 8
As long as the blade is pulled, the link 15 of the safety mechanism does not return to the front and remains in that position even if the tip of the nose separates from the object due to the reaction of the rapid movement of the blade. That is, the piston 16 of the trigger valve 9 remains pressed;
The grade does not double drive, and double drive of nails is reliably prevented.

Next, the case where the pin 82 is in a position where it cooperates with the second hook member 22 will be explained with reference to FIGS. 1, 4, and 6. As shown in FIG. 6, the pin 8z is moved so that its tip 89 is in a position protruding laterally from the second hook member 22, and the lock lever 41 is inserted into the predetermined groove 40.
The position of the pin is held and fixed by fitting into the pin. When the trigger 8 is pulled in this state, the second
Hook member 22 pivots. This 11.2 hook member 2
Since the pin 2 is made of a resilient material as mentioned above, it comes into contact with the tip 89 of the pin 82 and is bent further outward by the pin, as shown by the broken line in FIG.

In this state, if you press the nose tip 11 against the object,
The link 15 of the safety mechanism 18 can be retracted together with the pin 82, and the lever 17 in the trigger 8 pushes the piston 16 of the trigger valve 9, as shown by the chain line in FIG.
Compressed air is pumped into the cylinder 8 to rapidly move the blade 10 forward so that the nail can be driven into the object. That is, a touch trip hitting operation can be performed.

However, as shown by the chain line in FIG.
2 is the second hook member 2 when the trigger valve 9 is energized.
z returns to the position shown by the solid line, the hook 28 holds the tip 82 of the pin 82, and unless the bird f-8 is released, the link 15 of the safety mechanism 18 is not allowed to return, and the touch trip strike is performed only once. I am only supposed to do it. This also means that the safety mechanism is prevented from returning due to reaction when the blade is driven in, thereby reliably preventing double strikes.

If the 51 hook member 22 is activated, trigger trip striking is also possible. That is, as shown in FIG. 7, this is a driving method in which the tip of the nose is first pressed against the object and the trigger 8 is pulled in this state. In this case also the 9th
The hook member 22 as shown by the chain line in the figure is
8 holds the tip 89 of the pin 82 and acts to prevent the link 15 from returning unless the trigger 8 is released, thereby preventing double striking.

FIG. 7 shows the pin 82 in a position where it does not act on either the first hook member 21 or the twenty-seventh hook member 22; It operates in the same way and can continuously perform not only trigger trip shots but also touch trip shots.

Effects of the Invention According to the present invention, double striking can be reliably prevented with a simple configuration that only requires additional pins and hook members.

[Brief explanation of the drawing]

1 is a partial side sectional view from the right side of a portion of a nailing machine incorporating the features of the present invention; FIG. 2 is a bottom view of the nailing machine of FIG. 1; and FIG. FIG. 4 is a partial sectional view of the right side of a part of the nailing machine according to the present invention with the safety mechanism retracted, and FIG. S is the nailing machine of FIG. 9. FIG. 6 is a partial bottom view of the nailing machine with the pin in cooperative relationship with the second hook member, and FIG. 7 is a partial sectional view of the nailing machine with the pin in a position where it does not cooperate with both hook members. FIG. 3 is a partial bottom view of the machine.

Claims (1)

[Claims] 1. A nail feeding mechanism that guides a nail holding strip that holds nails at equal intervals and feeds the nails one by one into the driving part of the nose;
A nail driving mechanism that drives the nail of the nose driving part through the tip of the nose and into the object by pulling the trigger, and a nail driving mechanism that extends from the tip of the nose to the trigger and retreats only when the tip of the nose is pressed against the object. A nailing machine equipped with a safety mechanism for enabling operation of a trigger, further comprising: a hook member attached to rotate with the trigger; and a pin attached to the safety mechanism at a position adjacent to the hook member; This pin is in a position where it comes into contact with the tip of the hook member and prevents the safety mechanism from retreating when the trigger is pulled without pressing the nose tip against the object.
The nailing machine is characterized in that when the tip of the nose is pressed against an object, the safety member is retreated, and the trigger is pulled, the nailer is held by the hook portion of the hook member and is in a position to prevent the safety mechanism from returning. 2. The nailing machine according to claim 1, wherein the hook member is made of a rigid plate-like body. 3. The safety mechanism includes a cylindrical body that covers the tip of the nose, a link member that extends from the cylindrical body to the trigger, and a lever that is pivoted to the rear end of the link member that extends into the trigger and that acts on the piston of the trigger valve. Claim 1, further comprising a spring provided between the nose and the cylindrical body to constantly bias the cylindrical body forward, and wherein the pin is attached to the link at a position adjacent to the trigger. Nailer. 4. The nailing machine according to claim 3, wherein the pin is formed into a rod shape and is attached to the link so as to be movable laterally so that it can be moved to a position where it does not cooperate with the hook member. 5. The nail gun according to claim 4, wherein the pin has grooves cut in at least two places, and a lock lever biased by a spring engages with the grooves. 6. A nail feeding mechanism that guides a nail holding strip that holds nails at equal intervals and feeds the nails one by one into the driving part of the nose;
A nail driving mechanism that drives the nail of the nose driving part through the tip of the nose and into the object by pulling the trigger, and a nail driving mechanism that extends from the tip of the nose to the trigger and retreats only when the tip of the nose is pressed against the object. A nailing machine equipped with a safety mechanism for enabling operation of a trigger, comprising: a hook member attached to rotate together with the trigger; and a pin attached to the safety mechanism at a position adjacent to the hook member; When the tip of the nose is pressed against an object to retract the safety mechanism and the trigger is pulled, the pin is held by the hook portion of the hook member and is in a position to prevent the safety mechanism from returning. A nail characterized in that when the trigger is pulled without pressing the nail against an object, the nail is in a position where the hook part and the tip of the hook member come into contact so as to push it sideways, thereby enabling the safety mechanism to retreat. Hitting machine. 7. The nailing machine according to claim 6, wherein the hook member is made of a plate-like body with spring elasticity. 8. The safety mechanism includes a cylindrical body that covers the tip of the nose, a link member that extends from the cylindrical body to the trigger, and a lever that is pivoted to the rear end of the link member that extends into the trigger and acts on the piston of the trigger valve. Claim 6, further comprising a spring provided between the nose and the cylindrical body to constantly bias the cylindrical body forward, and wherein the pin is attached to the link at a position adjacent to the trigger. Nailer. 9. The nailing machine according to claim 8, wherein the pin is formed into a rod shape and is attached to the link so as to be movable laterally so that it can be moved to a position where it does not cooperate with the hook member. 10. The pin has at least two grooves,
10. The nailing machine according to claim 9, wherein a spring-biased lock lever is adapted to engage with said groove. 11. A nail feed mechanism that guides a nail holding strip that holds nails at equal intervals and feeds the nails one by one into the nose driving section, and by pulling the trigger, the nails in the nose driving section pass through the tip of the nose and pass through the target object. a nail driving mechanism that drives the nail into the object; and a safety mechanism that extends from the tip of the nose to the trigger and retreats only when the tip of the nose is pressed against an object to enable operation of the trigger. , a first hook member and a second hook member attached to both sides of the trigger so as to pivot together with the trigger, and attached to the safety mechanism at a position adjacent to these hook members and cooperating with either hook member. a pin that can be selectively moved to a position, the first hook member being a rigid plate, and the first hook member not pressing the tip of the nose against the object when the pin is in the cooperative position. When the trigger is pulled, the tip contacts the pin and is in a position to prevent the safety mechanism from retreating, and when the nose tip is pressed against the object and the safety mechanism is retreated and the trigger is pulled, the hook part holds the pin. and is in a position to prevent the safety mechanism from retracting, and the second hook member is made of a plate-like body having spring elasticity, and the second hook member targets the tip of the nose when the pin is in the cooperative position. When the trigger is pulled without being pressed against an object, the side surface between the hook part and the tip is pushed sideways by the pin and is in a position that allows the safety mechanism to retreat, and the tip of the nose is pressed against the object. A nailer characterized in that when the trigger is pulled, the hook portion is in a position to hold the pin and prevent the safety mechanism from returning. 12. The safety mechanism includes a cylindrical body that covers the tip of the nose, a link member that extends from the cylindrical body to the trigger, and a lever that is provided in the trigger and is pivoted to the rear end of the link member and acts on the piston of the trigger valve. , a spring provided between the nose and the cylindrical body to always bias the cylindrical body forward; the pin is formed in a rod shape and is attached to the link at a position adjacent to the trigger so as to be movable laterally; 12. The nailing machine according to claim 11, wherein the nailing machine has a fixed position and the position thereof can be selected. 13. The nail gun of claim 12, wherein the pin can be moved to a position where it does not cooperate with any hook member. 14. The nailing machine according to claim 13, wherein grooves are cut in the pin at three locations, and a lock lever biased by a spring engages with the grooves.