JPH0546858Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a clincher for binding materials to be bound by bending a staple in which a crown and legs at both ends thereof are formed into a U-shape in opposite directions.

(Prior Art and its Problems) Methods of bending the legs of staples using the bending grooves of the clincher during binding include the so-called in-line clinch method and the bypass clinch method. The former is for aligning the longitudinal direction of the crown with the bending direction of the legs, and the latter is for bending the legs in opposite directions with respect to the longitudinal direction of the crown. According to the former, the tip of the bent leg collides inside the clincher and may be bent greatly, as shown in Figure 4a, but in the latter case, there is no collision and the leg is parallel to the crown. This makes it possible to achieve relatively good spelling.

However, since the bypass clinch simply guides the legs of the staple on both sides to be bent in opposite directions, if the material to be stapled is too thin or the staple legs are bent too tightly, it may result in As shown in the figure, the legs that have penetrated the material to be stapled may re-pierce and protrude from the surface of the material to be stapled, and the protruding portion may injure your hands. The folded height is larger and the appearance is not good.

(Technical Problems of the Invention) The present invention solves the above-mentioned drawbacks and provides a clincher that has the advantage that the staple leg does not re-penetrate in the in-line clinch method and the advantage that the staple leg becomes flat in the bypass clinch method. The technical challenge is to do so.

(Means for Solving the Problems) In order to solve the above problems, the clincher according to the present invention is a clincher that binds materials to be bound by bending a staple formed by forming a crown and legs at both ends into a U-shape. and a leg receiving part that receives the leg end of the staple and is wider than the cross section of the staple leg, and a leg receiving part that is formed continuously with the leg receiving part and that when bent, the leg ends are aligned with each other in the longitudinal direction of the crown. a first guide side wall that guides the first guide side wall oppositely to the first guide side wall;
and a second guide side wall that is formed opposite to the rear end of the guide side wall and guides the staple leg tip so that a part of the leg tip immediately before the bending is completed faces the lower surface of the crown. It is characterized by having.

(Operations and Effects of the Invention) As described above, according to the present invention, the leg portion of the staple that has penetrated the material to be stapled first hits the leg tip receiving portion of the bending groove of the clincher and begins to bend. The legs are guided by a first guide side wall formed continuously in the section to bend in opposite directions, and just before the bending is completed, the tip of the leg is partially bent by the second guide side wall to the crown. You will be guided so that you are facing the bottom, and the bending of the legs will be completed.

Therefore, the bent staple leg tips do not collide with each other. In addition, even if the material to be stapled is too thin or the legs are bent too tightly, some of the tips of the staple legs are exposed to the underside of the crown, so they will eventually hit the underside of the crown. Since it does not protrude upward any further, re-penetration is prevented and it can be bent flat. Therefore, good spelling can always be achieved.

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

In the figure, symbol A indicates a clincher. This A
A bending groove 2 is provided in which both end leg portions 1a of the staple 1 are bent. This bending groove 2
is formed continuously with the leg receiving part 3 which receives the tip of the leg 1a of the staple 1 and is wider than the cross section of the staple leg, and guides the tip of the leg 1a outward when bent. It is composed of a first guide side wall 4 and a second guide side wall 5 that is formed facing the rear end of the first guide side wall 4 and guides the tip of the leg 1a inward when the bending is completed. There is.

The leg receiving part 3 is a part that is inclined at the end of the bending groove 2 and receives the tip of the leg 1a of the staple 1 that has passed through the material to be stapled.
After hitting the inclined leg tip receiving portion 3, the portion a is guided to the center of the bending groove 2.

The first guide side wall 4 is bent after hitting the leg tip receiving part 3, and the ends of the leg parts 1a on both sides guided inside the bending groove 2 are bent on opposite sides (folded) in the longitudinal direction of the crown. This is a side wall that guides the groove 2 so as to bend toward the outside.

The second guide side wall 5 is formed to face the rear end of the first guide side wall 4, and the tip of the staple leg 1a is arranged so that a part of the tip of the leg 1a immediately before the bending is completed faces the lower surface of the crown 1b. Fold the groove 2
It is a side wall that guides the inside of the

Since the clincher A is configured as described above, the leg portion 1a of the staple 1 that has passed through the material to be stapled (not shown) first hits the leg tip receiving portion 3 of the bending groove 2, and then Guided by the slope, it begins to bend. At this time, since the first guide side wall 4 is continuously formed on the leg receiving portion 3, the leg portions 1a are guided by the first guide side wall 4 and bent to the outside of the bending groove 2. Furthermore, just before the bending is completed, the tip of the leg 1a is in the second position.
The leg portion 1a is guided inside the bending groove 2 by the guide side wall 5, and the bending is completed when a part of the tip of the leg portion 1a faces the lower surface of the crown 1b.

In this way, according to the clincher A, bypass clinching is performed, so that the tips of the bent staple leg portions 1a do not collide with each other. Furthermore, even if the material to be stapled is too thin or the leg portion 1a is bent too strongly, a portion of the tip of the leg portion 1a of the staple 1 faces the underside of the crown 1b, so the above Hitting the bottom,
Since it does not protrude upward any further, re-penetration is prevented and it can always be bent flat.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the clincher according to the present invention, FIG. 2 is a sectional view taken along the line X-X of FIG. 1, and FIG.
The figure is a bottom view of the staple folded in the above manner, and FIGS. 4a and 4b are side views of the staple folded in the conventional manner. Code A... Clincher, 1... Staple, 1
a... Leg portion, 1b... Crown, 2... Bending groove, 3... Leg end receiving portion, 4... First guide side wall, 5... Second guide side wall.

Claims (1)

[Claim for Utility Model Registration] A clincher for binding materials by bending a staple formed by a crown and legs at both ends in a U-shape, which receives the tips of the legs of the staple and also has staple legs. a leg tip receiver wider than the cross section of the crown; a first guide side wall that is formed continuously with the leg tip receiver and guides the leg tips when bent in opposite directions with respect to the longitudinal direction of the crown; , the first
and a second guide side wall that is formed opposite to the rear end of the guide side wall and guides the staple leg tip so that a part of the leg tip immediately before the bending is completed faces the lower surface of the crown. A clincher characterized by having.