JP2000202783A - Tacker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly carry out a feeding of a staple. SOLUTION: In a feeding mechanism 7 formed in a magazine 5, a front end of a pusher 8 for urging staples 10, 10 in a passage 6 to a hitting out port 4 side is formed to inclined edges 8a, 8a inclined such that a lower portion opposed to tip ends 10a, 10b of the staple 10 is apart from the tip ends 10a, 10b as it backwardly proceeds. Edge surfaces 8a, 8b continued to an upper side of the inclined edges 8a, 8a and being parallel to the hitting out port can be abutted to the staple 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tucker in which a magazine capable of accommodating a plurality of the staples is connected to a U-shaped staple ejection port.

[0002]

2. Description of the Related Art FIG. 5 is an explanatory view showing a longitudinal section of a magazine 21 in the above-mentioned tucker. A magazine 21 capable of accommodating a plurality of staples 26 is provided at an ejection opening 20 of a U-shaped staple 26 by a hammer (not shown). A pusher 24 (see FIG. 4), which is slidable and has a substantially U-shaped cross section,
(C)) and a feed mechanism 23 composed of a coil spring 25 for urging the pusher 24 toward the ejection port 20 side. Therefore, the staples 26, 26,... Accommodated in the passage 22 in front of the biasing side of the pusher 24 are:
Since the staples 26 are pressed against the ejection opening 20 by the pushers 24, the staples 26, 26,... Are sequentially fed forward each time the staples 26 in the front row are ejected by the hammer, and the staples 26 to which the pushers 24 directly contact can be ejected. . Reference numeral 27 denotes a guide body for preventing the staples 26 from falling down and the pushers 24 from being inclined in the passage 22.

[0003]

In the above-mentioned magazine 21, the passage 22 is formed to have a U-shape with a large size so as to cope with a variation in the accuracy of the staples 26 and a variation by the manufacturer. 24
Regardless of the difference in the shape of the staples 26, it is necessary to always have an intermediate shape capable of abutting the end face of the staples 26, so that the clearance between the passage 22 and the pusher 24 cannot be avoided. Therefore, when using the staple 26 whose both ends are alternately shifted back and forth as shown in FIG. 5, the pusher 24 is disposed between the guide body 27 and the last staple 26.
Entangled and stopped in the middle of passage 22 and staple 26
Feed may stop. In order to prevent this, it is effective to suppress the clearance between the passage 22 and the pusher 24 as much as possible, but on the other hand, high precision is required for the dimensions of the passage 22 and the pusher 24, so that the manufacturing cost increases.

Accordingly, an object of the present invention is to provide a tucker which can prevent a feed stop due to such a staple biting with a simple configuration and can realize a reliable staple punching out to the end. It was done.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, an end of the pusher which comes into contact with the staple, the leading end of the staple is connected to the staple. And a non-contact escape portion.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall view of an air tucker 1. A main body 2 to which air is supplied from an end portion of a handle 3 has a built-in hammer (not shown) which protrudes and retracts from an ejection port 4 by operation of a trigger 2a. It is possible to launch staples from. In addition, a staple magazine 5 is provided at the ejection port 4 in an orthogonal manner. As shown in FIG. 2, the magazine 5 is formed with a rectangular passage 6 in which a staple 10 bent in a U-shape can be stored, and in the passage 6, FIGS.
And a pusher 8 which is bent in a substantially U-shaped cross section and is slidable along the passage 6, and attaches the pusher 8 to the front (the ejection opening 4 side, hereinafter described in the front-back direction in the magazine 5). A feeding mechanism 7 including a coil spring 9 as a biasing means for biasing is formed, and a plurality of staples 10, 10... I have. 11 is a pusher 8 and a staple 1 in the passage 6.
This is a guide body that maintains an appropriate posture of zero.

[0007] At the front end of the pusher 8, a lower portion of the rearmost staple 10 that faces the front end portions 10a and 10b is a relief portion that is inclined so as to separate from the staple 10 as approaching the front end portions 10a and 10b. Are formed on the inclined edges 8a, 8a, and only the edges 8b, 8b continuous with the upper side of the inclined edges 8a, 8a and parallel to the ejection opening 4 can be brought into contact with the staple 10. When the inclination angle is too large, the staples 10, 10...
0a, 10b enter the inclined edge 8a side, and the staples 10, 10,.
It is formed at a small angle where there is no possibility of such lodging.

[0008] The air tucker 1 configured as described above,
Each time the hammer hammers out the staples 10, the staples 10, 1
Is pressed in order, but when the staples 10 are running low, the staples 10 are pushed by the pusher 8.
May open between the tip portions 10a and 10b. But,
The inclined edges 8a, 8a of the pusher 8 are
Since it is not in contact with b, there is little possibility that the pusher 8 is caught between the guide body 11 and the last staple 10. Also, even if biting occurs, the inclined edges 8a,
8a makes the contact portion with the staple 10 the edge 8b,
8b, the bite amount is small, and even if the staples 10 whose tip portions 10a, 10b are alternately shifted back and forth as shown in FIG. Smooth feeding is performed.

As described above, according to the above-described embodiment, the pusher 8 is formed with the slanted edges 8a, 8a as escape portions, so that the shape and the deformation of the staple 10 can be changed.
The staple 10 can be completely used up to the end without stopping the pusher 8. Therefore, the workability of the staple 10 launching operation by the air tucker 1 is not impaired. Further, since this effect can be realized by a simple configuration in which the inclined edges 8a, 8a are provided at the front end of the pusher 8, it is not necessary to increase the precision of the clearance between the pusher 8 and the passage 6, and the cost does not increase.

The shape of the escape portion is not limited to the above-mentioned inclined edge 8a, and as shown in FIG. 4B, it may be a retreating edge 8c which retreats from the edge 8b and is parallel to the edge 8b. Edge 8a
Also, the formation of the parts 8c is not in contact with the distal ends 10a, 10b while securing the necessary pressing surface to the staple 10, such as by folding inward or outward other than by cutting. If possible, the specific shape and its forming means can be changed as appropriate.

[0011]

According to the first aspect of the present invention, since the escape portion is formed at the end of the pusher so as not to contact with the staple, the stop of the pusher can be performed irrespective of a difference in the shape or deformation of the staple. The staples can be used up to the end without causing any staples. Therefore, the workability of the staple driving operation by the tucker is not impaired.
In addition, since this effect can be realized by a simple configuration in which the escape portion is provided at the end of the pusher, it is not necessary to increase the accuracy of the clearance between the pusher and the passage in the magazine, and the cost does not increase.

[Brief description of the drawings]

FIG. 1 is an overall view of an air tucker.

FIG. 2 is an explanatory cross-sectional view of a magazine.

FIG. 3 is an explanatory longitudinal sectional view of a magazine.

FIG. 4A is an explanatory view of a pusher. (B) It is explanatory drawing of the example of a change of a pusher. (C) It is explanatory drawing of the conventional pusher.

FIG. 5 is an explanatory longitudinal sectional view of a conventional magazine.

[Explanation of symbols]

1. Air tucker, 2. Body, 4. Launching hole,
5 magazine, 6 passage, 7 feed mechanism, 8
Pusher, 9 coil spring, 10 staples.

Claims (1)

[Claims] 1. A magazine capable of accommodating a plurality of the staples is connected to an ejection opening of a U-shaped staple, and a pusher abutting on the staple is provided in the magazine, and the pusher is attached to the ejection opening side. A biasing means for biasing the staple, wherein an end of the pusher on the contact side with the staple, a leading end of the staple is formed as a relief portion not in contact with the staple. Tucker to be.