JP2836512B2 - Nail guide device for nailing machine for connecting nails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail guiding device for a nail driving machine for a connecting nail, which can automatically switch between a connecting nail using a wire and a connecting nail using a plastic connecting band.

[0002]

2. Description of the Related Art In general, a nail driving machine for connecting nails has a magazine for connecting nails and a feed passage for guiding the connecting nails derived from the magazine to the nose side. By the way, there are large connecting nails, a wire connecting nail formed by connecting a large number of nails via a wire and a plastic sheet connecting nail formed by connecting a large number of nails via a plastic connecting band. Is formed by bending a plastic sheet into a roughly square cross section,
Since each nail is inserted and connected to this box-shaped portion, the overall width is larger than that of the wire connecting nail. Therefore, in the feed path of both connecting nails, the former feed path is narrow, and the latter must be wide. Therefore, there is known a nail guide device provided with an adjustment plate capable of switching and adjusting a guide width of a connection nail in a feed passage so as to be compatible with both connection nails.

[0003] However, since the last nail of the wire connecting nail is only attached to the short wire, the nail head is tilted when the nailing machine is shaken after being fed into the nose portion, and the nail head is made of the plastic sheet connecting nail. There was a case where it fell into the escape part of the connecting band. In this case, since the head of the nail is not in the nose, the driver that is driven cannot hit the head of the nail, and the driver and the nail bite in the nose, causing a failure. There were drawbacks.

[0004] In the case of a wire-connecting nail, there is a problem that the next nail is dragged downward by the force when the foremost nail is hit and the wire is cut, resulting in poor nail feeding.

Further, the feed nail is fed by reciprocating the feed nail by a piston / cylinder mechanism, sending out one nail at the time of forward movement, and then retreating while swinging and engaging with the next nail. It is what you send out. An engagement groove for holding the nail is formed in the feed claw, but the feed claw comes off from the nail at the time of retreat. Since the nail has no means to prevent the nail from moving forward, the nail loses its support and shifts forward, resulting in a disturbed posture of the nail and poor hitting.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned drawbacks and to effectively prevent the function of feeding the wire connecting nails from being impaired by the plastic sheet connecting nails, thereby always keeping the wire connecting nails in a normal posture. It is an object of the present invention to provide a nail guide device in a nailing machine for connecting nails that can be used.

[0007]

In order to achieve the above object, a nail guiding device in a nailing machine for a connecting nail according to the present invention guides a connecting nail loaded in a magazine behind a body of a nailing machine forward. And a nose portion for guiding the driver to slide the front nail of the connecting nail supplied from the feed passage. A recess is formed in one side wall of the feed passage, and a wire is formed in the recess. Nailing machine for connecting nails, which has a guide plate which can also serve as a guide for connecting a plurality of nails through a plastic connecting band and a wire connecting nail connecting a number of nails through a plastic connecting band. In the above, the rear end of the guide plate is rotatably supported on a support shaft provided on the upper and lower walls of the concave portion of the feed passage, and the front end of the guide plate is disposed so as to be able to advance and retreat with respect to the feed passage. Guide plate The part protrudes into the feed passage and urges the spring so that the end face of the front part is located behind the nose part, and the head of the connecting nail formed on the upper end face of the guide plate and the other side of the feed path. The part guide groove guides the lower surface of the nail head of the wire connecting nail, and the surface of the guide plate is inclined such that its rear end is retracted from the feed passage and its front end protrudes into the feed passage. It is characterized in that it is formed as an inclined surface.

[0008]

According to the above construction, according to the width of the connecting nail loaded in the feed passage whether the connecting nail is a plastic sheet connecting nail or a wire connecting nail, the guide plate in the concave portion is centered on the support shaft. The connecting nail is rotated, and its front end advances by a spring with respect to the feed passage or retracts against the spring, thereby holding the connecting nail in the feed passage.

In the case of guiding the feeding of the wire connecting nail, when the nail in the nose portion is driven downward by the driver, the connecting wire is also pulled downward and cut,
At this time, the next nail connected to the connecting wire is also pulled downward. However, the lower surface of the nail head of this nail is guided and supported by the upper end surface of the guide plate and the head guide groove of the connecting nail formed on the other side of the feed passage. Therefore, the nail is held at a normal position without being shifted downward, so that feeding failure does not occur.

Next, after the feeding nail engages with one nail and sends it forward, it is disengaged from the nail and retracted so as to engage with the next nail. The rear surface of the shaft is supported by a check pawl provided on a conventional nailing machine. The side surface of the shaft portion is held between the surface of the guide plate inclined and spring-biased in the feed passage and the side surface of the feed passage on the opposite side. Therefore, even if the engagement is released by swinging the feed claw, the nail is properly held in the posture by the check claw and the guide plate, and is effectively prevented from moving forward.

Further, when the last nail of the wire connecting nail is fed into the nose portion, the wire is not supported without being supported from the rear, but the front portion of the guide plate projects into the feed passage, and the end face of the front portion is formed. Penetrates behind the nose,
Even if the head of the nail attempts to move backward, it does not hit the front end face of the guide plate and the nail axis of the nail does not tilt.
Therefore, even if the nailing machine is shaken, the head of the last nail does not fall outside the nose portion, and the nail can be normally driven up to the last nail.

[0012]

FIG. 1 is a view showing an open state of a nose portion and a feed path of a connecting nail of a nailing machine according to the present invention, and FIGS. 2 (a) and 2 (b) are views on a line XX of FIG. 1 in a closed state of the feed path. Sectional view of FIG. 3 (a)
FIG. 2B is a cross-sectional view taken along line YY in FIG. 1 in a closed state of the feed passage.

A nose portion 3 which guides the sliding of the driver 2 driven by a hitting mechanism (not shown) and has a nail injection port 3a is provided at a lower portion of the nailing machine main body 1.
One side of the nose portion 3 is connected to a feed passage 4 for supplying a connection nail loaded in a magazine (not shown) provided in the nailing machine main body 1 to the front (to the nose portion 3 side). .

One side of the feed passage 4 is formed on the nailer body 1 and the other side is formed on the inner surface of the door 5 which is rotatable about a shaft 12 with respect to the nose portion 3. a) (b), FIG.
(a) It is formed inside the door 5 when it is closed as shown in (b).

In the upper part of the feed passage 4 on the side of the nailing machine main body 1,
A guide groove 6 for guiding the nail head of the connecting nail is formed. An opening 7 is formed in a part of the feed passage 4. A feed mechanism is provided on the back side of the feed path 4, and a feed claw 8 of the feed mechanism is provided so as to be able to enter the feed path 4 from the opening 7 and to be able to reciprocate in the nail feed direction.

The feed mechanism is a feed claw by a piston / cylinder mechanism 9 driven by compressed air or the like in conjunction with the return movement of the driver 2 to the top dead center after driving and sliding, similarly to the known mechanism. The feed pawl 8 is configured to engage with one of the connecting nails in the feed passage 4 at the time of retreat, and to feed one nail forward at the time of forward movement. The feed claw 8 is rotatably attached to the tip of a piston rod 10 driven by a piston / cylinder mechanism 9, and disengages from the nail 11a which has been sent out by swinging as shown in FIG. It moves by one pitch of the nail and engages with the next nail 11b. A check claw 13 is rotatably arranged in the feed passage 4 to prevent the connecting nail sent out when the feed claw 8 is retracted from moving backward.

Next, as shown in FIGS. 3 (a) and 3 (b), a concave portion 14 is formed inside the door 5 which constitutes the other side wall of the feed passage 4, and the concave portion 14 has A guide plate 15 is rotatably arranged. This guide plate 1
5 is divided into an upper main plate portion 15a and a lower sub plate portion 15b (FIGS. 1, 2 (a) and 2 (b)).
reference).

The rear end of the guide plate 15 is rotatably supported by a support shaft 16 provided on the upper and lower walls of the concave portion 14 of the feed passage 4. The front end 17 of the guide plate 15 is It is arranged to be able to advance and retreat. Springs 18 and 19 are arranged between the bottom surface of the concave portion 14 and the back surfaces of the main plate portion 15a and the sub plate portion 15b of the guide plate 15. By the spring 18, the front portion of the guide plate 15 projects into the feed passage 4,
When projecting, the front end face 17 a is urged to be located behind the nose portion 3.

As shown in FIG. 2 (b), the upper end surface 20 of the guide plate 15 and the nail head guide groove 6 formed on the other side of the feed passage 4 together with the nail of a wire connecting nail to be described later. It constitutes the guidance of the lower surface of the head.

Further, by providing the support shaft 16 near the bottom of the recess 14, the surface 21 of the guide plate 15 is provided so as to be inclined with respect to the feed passage 4. That is, the rear end 22 of the surface 21 of the guide plate 15 is retracted from the feed passage 4, and the front end protrudes into the feed passage 4, so that the surface 21 is formed as an inclined surface.

Next, the manner of use of the guide device will be described. First, when guiding a plastic sheet connecting nail 24 formed by connecting a large number of nails 11 via a plastic connecting band 23, the connecting nail 24 is connected as shown in FIGS. 2 (a) and 3 (a). Since the width of the connecting band 23 is wide, the guide plate 15 is pushed into the recess 14 by the connecting band 23 and rotates around the support shaft 16, and the front end 17 of the guide plate 15 is opposed to the spring 18 against the feed passage 4. The connecting nail 24 is pressed and held in the widened feed passage 4 by retreating. At this time, since the connecting band 23 does not contact the lower sub-plate portion 15b, the connecting band 23 protrudes toward the feed passage 4 side by the spring 19, and the upper surface 20 supports the lower surface of the connecting band 23. Further, each nail head 28 of the connecting nail 24 is engaged with the guide groove 6 on the nail driver body 1 side. Thus, the plastic sheet connecting band 23 is pressed and held in the feed passage 4 by the guide plate 15, and the head 28 is
The connecting strips 23 are arranged so as to be guided and supported by the sub-plate portions 15b, and the front end nails are supplied to the nose portion 3 one by one by the feed mechanism as described above.

On the other hand, when a wire connecting nail 26 formed by connecting a number of nails 11 via a wire 25 is sent, the connecting nail 26 is shown in FIGS. 2 (b) and 3 (b). As described above, since the width of the guide plate 15 is smaller than that of the plastic sheet connecting nail 24, the guide plate 15 rotates around the support shaft 16, and the front end 17 of the guide plate 15 is advanced by the spring with respect to the feed passage 4 to reduce the feed passage. 4, the connecting nail 26 is pressed and held. At this time, one side of each nail head 28 of the connecting nail 26 is engaged with the guide groove 6 of the nailing machine main body 1, and the lower surface of the other side of each nail head 28 is on the upper end surface 20 of the guide plate 15. Guided and supported. Then, when the wire connecting nail 26 is fed by the feeding mechanism, the feeding claw 8 retreats, engages with one nail 11a, moves forward, and feeds out by the pitch of the nail. When the nail 11 in the nose portion 3 is driven out, the feed claw 8 retreats again and engages with the next nail 11b.

The nail in the nose portion 3 is
When driven downward, the connecting wire 25 is also pulled downward and cut, and at this time, the next nail 11b connected to the connecting wire 25 is also pulled downward. However, as shown in FIG. 2 (b), the nail head 2 of this nail 11b
8 is guided and supported by the upper end surface 20 of the guide plate 15 and the head guide groove 6 of the connecting nail 26 formed on the other side of the feed passage 4. Therefore, since the nail is held in a normal position without shifting downward,
No feeding failure occurs.

Next, as shown in FIG.
After engaging with the nail 11a and sending it forward, it is disengaged from the nail while swinging and retracted so as to engage with the next nail 11b. Is supported by the check pawl 13. FIG. 3 (b)
As shown in FIG. 2, the side surface of the shaft portion is inclined so as to protrude into the guide groove 6 and is urged by a spring in the protruding direction, and the side surface of the feed passage 4 on the opposite side. And held between. Accordingly, even if the engagement is released by the swing of the feed claw 8, the nail 11a is properly held in the posture by the check claw 13 and the guide plate 15, and is effectively prevented from moving forward.

Further, as shown in FIG. 5, when the last nail 11n of the wire connecting nail 26 is fed into the injection port 3a of the nose part 3, the spring 18 is free without any support from the rear. As a result, the front portion of the guide plate 15 protrudes into the feed passage 4 and the end face 17a of the front portion enters the rear of the nose portion 3, so that even if the head 28 of the nail 11n attempts to move rearward, The nail shaft does not lean on the front end face 17a. For this reason, even if the nailing machine is shaken, the head 28 of the last nail 11n does not fall outside the nose portion 3, and the nail can be normally driven up to the last nail.

[Brief description of the drawings]

FIG. 1 is a diagram showing an open state of a nose portion and a feed passage of a connecting nail of a nailing machine according to the present invention.

FIGS. 2 (a) and 2 (b) are cross-sectional views taken along line XX of FIG. 1 in a closed state of a feed passage when feeding a plastic sheet connecting nail and a wire connecting nail, respectively.

FIGS. 3 (a) and 3 (b) are cross-sectional views taken along line YY in FIG. 1 in a closed state of a feed passage when feeding a plastic sheet connecting nail and a wire connecting nail, respectively.

FIG. 4 is a cross-sectional view showing a state in which a feed claw moves backward.

FIG. 5 is a sectional view showing a state in which the last nail of the connecting nail has been fed into the nose part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nailer main body 2 Driver 3 Nose part 4 Feed passage 6 Guide groove of nail head 14 Depression 15 Guide plate 16 Support shaft 21 Surface of guide plate 24 Plastic sheet connecting nail 26 Wire connecting nail

Claims (1)

(57) [Claims] 1. A feed passage for guiding a connecting nail loaded in a magazine behind a nailing machine main body forward, and a nose for guiding a sliding of a driver for driving a front nail of the connecting nail supplied from the feed passage. A concave portion is formed in one side wall of the feed passage, and in this concave portion, a number of nails are connected via a plastic connecting band and a wire connecting nail formed by connecting a number of nails via a wire. In a nailing machine for connecting nails, which is provided with a guide plate that can also serve as a guide for plastic sheet connecting nails, a rear end of the guide plate can be turned on a spindle provided on upper and lower walls of a concave portion of the feed passage. And the front end of the guide plate is disposed so as to be able to advance and retreat with respect to the feed passage, and the front portion of the guide plate projects into the feed passage so that the end face of the front portion is located behind the nose portion. To the spring, The lower surface of the nail head of the wire connecting nail is guided by the upper end surface of the guide plate and the guide groove of the connecting nail formed on the other side of the feed passage. A nail guide device for a nailing machine for a connecting nail, wherein the nail guide device is formed as an inclined surface that is retracted from the feed passage and has a front end inclined so as to protrude into the feed passage.