JPH0525012U - Rivet - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents misalignment of the rivet body after crimping.
Stabilize the quality of the rivet joint. [Structure] The apex angle 1 of the tip of the rivet body 5 is substantially the same as the shape of the recess 12 of the molding snap 10 at the tip of the shaft 6.
4 forms a convex portion 13 having a conical shape of 120 °.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to rivets.

[0002]

[Prior Art]

 FIG. 2 shows a general rivet.

The rivet is formed by stacking a plurality of plates 3 and 4 in which rivet holes 1 and 2 are formed in advance so that the rivet holes 1 and 2 are aligned with each other, and then rivets the rivet holes 1 and 2. After inserting the shaft portion 6 of the main body 5, the head portion 7 of the hemispherical or truncated cone-shaped rivet body 5 is pressed by the molding snap 10, and the tapered portion of the tip of the shaft portion 6 protruding from the rivet holes 1 and 2 is formed. By applying another molding snap 10 to 9 and pressing the molding snap 10 using a riveter (not shown), the tapered portion 9 at the tip of the shaft portion 6 of the rivet body 5 is crushed to fasten a plurality of plates. It was done.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned conventional rivets have the following problems.

That is, the rivet body 5 was manufactured by cutting a rod-shaped member into short pieces at the time of manufacturing, forming a head portion 7 at one end of the cutting side and forming a tapered portion 9 at the other end of the cutting side. In some cases, the end face of the tapered portion 9 was not perpendicular to the axis, and the slight shear angle 11 formed during cutting remained as it was.

When the rivet body 5 with the remaining shear angle 11 is used in this way, the tapered portion 9 causes a partial contact with the molding snap 10 as shown in FIG. 3, so that the rivet body 5 is bent and caulked. The subsequent rivet body 5 was misaligned as shown in FIG. 4, and the quality of the rivet joint was not stable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rivet in which bending of the rivet body is prevented and a stable rivet joint is always obtained.

[0008]

[Means for Solving the Problems]

 According to the present invention, at the tip of the shaft portion 6 of the rivet body 5, there is formed a convex portion 13 having a conical shape with an apex angle 14 of 120 °, which substantially matches the shape of the concave portion 12 of the molding snap 10. It is related to the characteristic rivets.

[0009]

[Action]

 According to the present invention, the caulking is performed by the convex portion 13 formed at the tip of the shaft portion 6 of the rivet body 5 and having a conical shape with the apex angle 14 of the tip being 120 °, which substantially matches the shape of the concave portion 12 of the molding snap 10. Later bending of the rivet body 5 is prevented, and a stable rivet joint is always obtained.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention.

Also, in the figure, the same components as those shown in FIGS. 2 to 4 are designated by the same reference numerals, and the description thereof will be omitted.

At the tip of the shaft portion 6 of the rivet body 5, there is formed a convex portion 13 having a conical shape with an apex angle 14 of 120 ° which substantially matches the shape of the concave portion 12 of the molding snap 10.

Next, the operation will be described.

The process of fastening the plurality of plates 1 and 2 with the rivet body 5 is the same as in FIGS.

When the tip of the shaft portion 6 of the rivet body 5 is caulked by the molding snap 10, the tip of the shaft portion 6 of the rivet body 5 has a tip that substantially matches the shape of the recess 12 of the molding snap 10. Since the convex portion 13 having a conical shape with the apex angle 14 of 120 ° is formed, the convex portion 13 having the conical shape does not cause partial contact with the molding snap 10, and thus the rivet body 5 after caulking has a core. It prevents slippage and stabilizes the quality of the rivet joint.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0018]

[Effect of the device]

 As described above, according to the rivet of the present invention, it is possible to prevent misalignment of the rivet body after crimping and to stabilize the quality of the rivet joint.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a side view of a conventional example.

FIG. 3 is a partial view showing a state in which the rivet of FIG. 2 is partially hit.

FIG. 4 is a side view showing a state after the rivets of FIG. 2 have been crimped.

[Explanation of symbols]

 5 Rivet body 6 Shaft 10 Molded snap 12 Recessed portion 13 Convex portion 14 Vertical angle

Claims (1)

[Scope of utility model registration request] 1. A convex portion 13 having a conical shape with an apex angle 14 of 120 °, which substantially matches the shape of the concave portion 12 of the molding snap 10, is formed at the distal end of the shaft portion 6 of the rivet body 5. And rivets.