JPS6357190B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a nail feeding device for a nail gun.

(Prior Art) Nailers that automatically drive nails usually use a so-called nail belt in which a large number of nails are connected in parallel by appropriate connecting means. In this case, the nailer has a magazine that stores the nail belt, a guide section that guides the nail belt pulled out from the magazine to the nail driving section, and a guide section that opens and closes the guide section when setting the nail belt. The purpose is to have a door. Also, when the nail is hit in the driving part,
Since the nail in the next position tends to move back, a check pawl must be provided to prevent this.

(Problem to be solved by the invention) However, regarding the installation of this non-return claw, if it is attached to the door side, the non-return claw will interfere with the nail when closing the door after the nail is set, and the nail belt will be misaligned. This may cause the door to become unable to latch.

This invention is intended to facilitate the loading of nails by providing a non-return claw on the guide body side.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a nail formed by connecting a number of nails in parallel using an appropriate connecting means, on the back side of the guide body. A nail feeding device for a nailer that feeds a nail into a driving part of a nail gun while being guided on the front side of a guide part main body by a provided nail feeding cylinder and a feeding claw, the nail feeding device having a nail feeding device that feeds a nail into a driving part of a nail gun while being guided on the front side of a guide part main body by a provided nail feeding cylinder and a feeding claw, The structure was such that a check pawl was attached toward the door to prevent the nail from moving backwards.

(Function and Effect) Therefore, according to the above configuration, since the non-return claw is provided on the guide body side, when loading a large number of connected nails into the guide body, the door is not closed. Before closing, the nail is already held by the feed pawl and the check pawl. Therefore, when the door is closed, it is possible to avoid a situation where the nail belt becomes misaligned and the nails interfere with each other, so that the loading operation becomes smooth.

(Example) Hereinafter, an example embodying the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the entire nailing machine of this example, and the nailing machine main body 1 is integrally formed of a magazine M supported by a handle H via a bracket B, and a nail driving part U. It is provided with a guide part G for guiding the nail feeding operation from the magazine M to the driving part U.

For example, the lower part of the magazine M is designed to open downward, and a nail belt (many nails N) is connected from here.
(which are connected in a belt shape at equal intervals by connecting means such as adhesive tape T) can be stored in a spiral shape. Moreover, an opening is provided in a part of the side surface for pulling out the nail belt toward the guide portion G side.

The driving unit U includes a driver guide 21 that is integrally suspended from the lower part of the nailer main body 1.
A driving path 23 for the driver 22 is formed inside thereof. Further, a safety 24 is provided in close contact with the front side of the driver guide 21. The upper end of this safety 24 is slidably fitted into a locking groove 25 formed at the base of the driver guide 21, so that the entire safety 24 can be moved up and down. on the other hand,
The lower part of the safety 24 is bent inward to form a U-shaped pressing piece 24a against the material W to be driven. Note that the lower end of the safety 24 is lower than the driver guide 21 in a normal state.

Further, in this example, the nail N is fed using the vertical movement of the safety 24. That is, a part of the safety 24 near the center is bent toward the back side so that the bending piece 2
6 is formed. Further, the bent piece 26 is connected to the front surface of the piston 18 provided on the back side of the guide body 2 via a connecting arm 27. This piston 18 has feed claws 16a,
The nail N is connected to the feed arm 13 having a shaft 16b, so that the nail N can be fed in accordance with the movement of the piston 18. Further, the bent piece 26 is provided with a locking lever 30 having a locking piece 29, which engages with a stopper 28 protruding from the side surface of the cylinder 17 having the piston 18, thereby allowing the safety 24 to come off. It has been stopped.

Next, the guide section G for feeding the nail N from the magazine M to the driving section U will be explained. Information department G
is provided with a channel-shaped guide body 2 integrally formed in the lateral direction from the driving part U. Both ends of the guide body 2 communicate with the magazine M and the driving path 23 in the driving unit U, and a guide groove 6 is formed in the upper part of the front surface along the longitudinal direction, and the nail N is sent with the head held here. Further, the front side of the guide body 2 is covered by a door 3 attached via a hinge 4, and can be opened by pressing down an opener 5. In addition, when the door 3 is in the closed state, a passage K is formed between the door 3 and the guide body 2 with a distance necessary for the passage of the nail N.

Now, a feed arm 13 for feeding the nail N is attached near the driving portion U in the guide body 2. This feed arm 13 is connected to the guide body 2
It is always stored in an attitude parallel to the passage K in the upper storage part 14 which is recessed in the upper front surface.
Further, slits 15, 15 are opened on both sides of the cylinder 17 in the upper storage portion 14.
The rear end of the feed arm 13 passes through a slit 15 near the magazine M and holds the rear end of the piston 18 of the cylinder 17, and a torsion spring 19 biases the feed arm 13 clockwise in FIG. It is rotatably connected via pin P2. Therefore, the feed arm 13 can slide along the longitudinal direction within the upper storage portion 14 in accordance with the displacement of the piston 18.

Furthermore, first and second feed claws 16a and 16b are formed protruding from the tip side of the feed arm 13. The spacing between the two feeding claws 16a, 16b is set to be the same as the pitch of the nail belt, and in this example, the second nail N2 from the top is sandwiched therebetween (see FIG. 3). Further, the tip of the feed arm 13 faces the driving path 23 so as to be slightly wedged therein.

The check piece 7 for regulating the reverse movement of the nail belt is
It is stored in a lower storage section 11 formed below the upper storage section 14 . A return spring 12 is rotatably attached via a pin P1 and is interposed between the inner wall surface of the lower storage portion 11.
is biased to rotate toward the door 3 side.

As shown in FIG. 6, the check piece 7 has a U-shaped cutout at the top end, and this recess 7a
The tip of the above-mentioned feed arm 13 is fitted into this. In addition, a pair of first and second check claws 1 are located above and below the scooped out portion.
0a, 10a', 10b, 10b' are projected at intervals corresponding to the pitch of the nail belt. Also,
These check claws 10a, 10a', 10b, 10b' are assembled so as to be aligned with both feed claws 16a, 16b, respectively. Furthermore, check piece 7
A projecting piece 8 is formed on the front edge of the projecting piece 8.
It faces into the driving path 23 of. Further, the end edge of the protruding piece 8 is formed with an upwardly inclined inclined surface 9,
Interference with the driver 22 when driving the nail N is avoided to smooth the backward movement.

Note that the front edge of the lower first non-return pawl 10a faces into the driving path 23, but the front edge of the first non-return pawl 10a on the upper side faces the driving path 23.
The front edge of 0a' is formed approximately along the driving path 23.

Subsequently, the functions and effects of this example formed as described above will be specifically explained.

To explain the nailing work for the material W to be driven, first, the nailer main body 1 is stood up, and the pressing piece 24 is
a against the workpiece W to push up the safety 24. In this state, when the trigger of the nail gun is pulled, the driver 22 falls along the driving path 23, and the protrusion 8 and the first check claws 10a, 10
The leading nail N1 held between nail a' is struck. This nail N1 forcibly releases the connection with the second nail N2 and passes together with the driver 22, and the head of the nail pushes and slides on the inclined surface 9 of the projecting piece 8, so that the check piece 7 returns to its original position. It is pushed backward against the spring 12. In this way, since the check piece 7 opens the driving path 23, the nail N passes through this and drives the material W.
is driven into.

On the other hand, as described above, when the safety 24 is pushed up, the piston 18 is displaced via the connecting arm 27 against the return spring 20. Then,
Since the feed arm 13 moves to the right in FIG. 3, the feed arm 13 rotates slightly against the torsion spring 19, climbs over the second nail N2, returns again with the torsion spring 19, and moves to the third nail. Nail N3 is held by both feed claws 16a and 16b. Note that the feed claws 16a and 16b are the second and third nails N2 and N.
3, the second check claws 10b, 10
b' restricts the second nail N2 from moving backwards.

Then, when the driving of the nail N1 is completed and the nailer main body 1 is lifted, the safety 24 is returned to its original state. Along with this, the return spring 20 inside the piston 18
As the feed arm 13 is pushed out, the second nail N2 (in this case, the leading nail) is pushed laterally by the outer surface of the first feed claw 16a. Therefore, the nail N2 pushes the check piece 7 backward, climbs over the first check pawls 10a and 10a', and is sent out to the driving path 23. That is, as a result, the entire nail belt moves forward and is ready for the next nailing operation. Also, place the tip end side of the check piece 7 into the driving path 2.
3, and is held until the time of driving the nail, so that it can be used even with flexible connecting means such as adhesive tape T that easily deforms the nail belt. Demonstrated.

Next, I will explain the setting of the nail belt.
First, press down on opener 5 to open door 3,
Pull out the nail belt from magazine M. Then, the leading nail N1 is positioned in the driving path 23 between the projecting piece 8 of the check piece 7 and the first check pawl 10a, 10a'. Also, move the second nail N2 to both feed nails 1
6a, 16b and both reducing claws 10a, 10
a', 10b, 10b', and close the door 3 under this position. When setting the nail belt, in this example, in addition to the feed arm 13, the check piece 7 is also incorporated into the guide body 2, so that the nail N1 at the leading end is set before the door 3 is closed.
is reliably held between each pawl, so when the door 3 is closed, there is no displacement of the nail belt due to interference between the non-return pawl and the nail, unlike in the conventional case. Therefore, the door 3 can be smoothly closed without causing any jamming when the door 3 is closed.

Further, in this example, since the feed arm 13 and check piece 7 are both provided on the guide body side, the structure on the door 3 side is simplified. Therefore, since the door 3 does not need to have a particularly three-dimensional structure, it has the advantage that it can also be made of resin.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention,
Fig. 1 is a front view showing the entire nailing machine, Fig. 2 is a partially cutaway sectional view showing an enlarged view of the vicinity of the nail driving part, Fig. 3 is a sectional view taken along line A-A' in Fig. Figure 4 is same B
-B' line sectional view, Figure 5 is the same C-C' line sectional view, Figure 6
The figure is a perspective view showing the check piece, FIG. 7 is a rear view of the driving part before nail driving, and FIG. 8 is a rear view during nail driving. 1... Nailer body, 7... Check piece, 10a, 1
0a', 10b, 10b'...Return check claw, 13...Feed arm, 16a, 16b...Feed claw.

Claims (1)

[Claims] 1. Nails formed by connecting a number of nails in parallel using appropriate connecting means are attached to the front side of the guide body by means of a nail feed cylinder and a feed pawl provided on the back side of the guide body. The nail feeding device of the nail gun feeds the nail into the driving part of the nail gun while being guided by the guide part, and the guide part body side has a non-return piece having a non-return claw for preventing the nail from moving backwards on the door side. A nail feed device for a nail gun, characterized in that it is attached to the nail driver.