JPH1137117A - Blind rivet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance shearing force resistance of a rivet by forming a cut part of a shank so as to be placed in a lock part. SOLUTION: In a tube 11 serving as a rivet main body, a tube 14 is further fitted, and this tube 14 is protruded a little from a piled plate 7, 8. When a shank 13 is pulled, an end part 11a of the tube 11 in a tip side from the tube 14 is deformed to be swollen and brought into press contact with the plate 7. At this time, by presence of the tube 14, the tube 11 in an inner side thereof is prevented from being swollen, and large compressive force is prevented from acting in the plate 8. Consequently, the plate 8, even when it is easily compression deformed, is difficult to be deformed, and is surely tightened. A cut part 13b of the shank 13 is provided in a hexagonal columnar flange 12, and shearing strength is supported by the rest part of the shank 13 in the tube 11, 14. Consequently, shearing strength is increased. A length of the flange 13 is suitably selected by considering thickness of the connected plate 7, 8 so as to surely place the cut part 13b in the inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind rivet for penetrating a shank from one end of a tubular rivet main body, pulling the shank, and expanding the other end of the main body for fastening.

[0002]

2. Description of the Related Art A blind rivet of this type has been well known as described in Japanese Utility Model Laid-Open Nos. 62-115512, 62-62008, and 55-82515. As shown in FIG. 7, a flange 2 serving as a stopper is formed at one end of a cylinder 1 serving as a rivet body, and the cylinder 1 is made to penetrate a workpiece B, and a shank 3 penetrating through the inside of the cylinder 1. Is pulled by a jig P as indicated by an arrow a in FIG.
The other end is swelled, and the object B is clamped and fastened by the swelling portion 1a and the flange 2 (FIGS. B and c). At this time, the shank 3 is cut with a required tensile force (FIG. 3C).

[0003] The blind rivet A has a shank 3
Is used to fasten a structure having a structure in which the caulking jig P cannot be inserted into the back surface of the workpiece B (the other end of the cylinder 1). For example, FIG.
Are used for fastening the inner wall board 8 of the inner wall surface of the container C of the container car shown in FIG. That is, the inner wall surface of the container C has a bone rod 7 assembled along the outer wall, and a plywood plate is fastened to the bone rod 7 with a blind rivet A (see FIG. 2).

[0004]

On the inner wall of the container C, since the plywood is inferior in waterproofness, durability and heat insulation, the board 8 (see FIG. 2) having a gap a by a hard resin which is superior to them. Adoption was considered.

However, when the board 8 is used, if the board 8 is overlaid on the bone rod 7 and fastened with a blind rivet A, the board 8 may be depressed and the depressed portion b may be damaged (FIG. 8). (B)). The depression b and the damage are not preferable in appearance.

[0006] For this reason, the present applicant has disclosed in
As shown in Japanese Unexamined Patent Publication No. 919, the dent b and breakage were prevented by further fitting the cylinder 1 to the cylinder 1.

In the manufacturing process of the container C, as shown in FIG. 2, the outer wall plate 9 is attached with a blind rivet A, and the inner and outer walls 8, 9 of the door D are fixed with the blind rivet A. At this time, the shear strength of the rivet portion became a problem. That is, since a large impact may be applied to the outer wall, a high shear strength of the rivet portion is required, and the door D is opened and closed violently. This is because there is a danger of being caught.

In the conventional rivet structure, as shown in FIG. 8, the cut portion 3b of the shank 3 is in the cylinder 1, and the shear strength of the rivet is secured by the cylinder 1. For this reason, in a case where a high shear strength is required such as an outer wall, or a case where a strong shear force acts as a door D, as shown in FIG. May be done.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to increase the shear strength of a rivet.

[0010]

According to the present invention, there is provided a blind rivet comprising:
The shank was cut inside the stop.

[0011] In this case, since the shear strength of the rivet is ensured by the cylinder and the remaining shank, the strength of the rivet portion is increased.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 3 and 4, a cylinder 11 serving as a rivet body through which a shank 13 penetrates is provided with a hexagonal column-shaped flange 12 at one end, and another cylinder 14 is fitted into the cylinder 11. Can be The tube 11, the flange 12, and the shank 13 are made of an aluminum alloy, and the other tube 14 is made of a metal such as an aluminum alloy and a copper alloy. As shown in FIG. 5 (a), the length of the cylinder 14 is set such that when penetrated through the workpieces 7 and 8, the end surfaces thereof slightly project from the workpiece surface or are flush with each other. I do.

FIGS. 1 and 2 show the blind rivet A.
In order to attach the board 8 to the rod 7 of the door D shown in FIG. 5A, first, as shown in FIG. 5A, a rivet A is inserted from the board 8 side, and ) To (c), the tube 11 protruding from the tube 14
Is bulged by the shank head 13a, and the bulged portion 11a and the flange 12 clamp the board 8 to the bone rod 7 by clamping.

At this time, the presence of the cylinder 14 causes the cylinder 1
The bulging deformation of the cylinder 11 in 4 is prevented, and no large compressive force acts on the board 8. Therefore, there is almost no possibility that the board 8 is depressed by the pressing from the flange 12 side. The cutting portion 13b of the shank 13 is located in the flange 12, and the shear strength of the rivet A is borne by the cylinder 11 and the rest of the shank 13. The position of the notch 13b '(see FIG. 4) and the length of the flange 12 (the longitudinal direction of the shank 13) are adjusted to the thickness of the plates 7 and 8 to be joined so that the cut portion 13b always reaches the inside of the flange 12. Set as appropriate. That is, it is possible to cope with a change in the plate thickness to be joined.

The outer wall plate 9 is riveted in the same manner, and the operation is the same. It goes without saying that an aluminum plate or the like similar to the outer wall plate 9 may be used instead of the board 8.

The shape of the flange 12 is not limited to a hexagon, but may be any of various polygons and irregular shapes as shown in FIGS. Further, the present invention relates to a cylinder 14
Of course, it can also be used for rivets that do not have them. For example, since the outer wall plate 9 is hard, it is not necessary to provide the cylinder 14.

[0017]

As described above, the present invention has a high shear strength.

[Brief description of the drawings]

FIG. 1 is a partially cutaway schematic view showing one use mode of an embodiment.

FIG. 2 is an enlarged perspective view of a main part of FIG. 1;

FIG. 3 is a perspective view of one embodiment.

FIG. 4 is an exploded perspective view of the embodiment.

FIG. 5 is an operation explanatory view of the embodiment.

FIG. 6 is a plan view of each example of a flange.

FIG. 7 is an explanatory diagram of an operation of a blind rivet.

FIG. 8 is a diagram illustrating the operation of a conventional example.

[Explanation of symbols]

 Reference Signs List A Blind rivet B Workpiece P Fastening jig 1, 11 tube 1a, 11a tube bulging portion 2, 12 flange (stop portion) 3, 13 shank 3a, 13a shank head 7 bone rod 8 board 9 outer wall plate 13b cutting Part 13b 'notch for cutting 14 another tube

Claims (1)

[Claims] An end of a cylinder is bulged to form a stopper, and the cylinder is made to penetrate through objects to be fastened.
The shank 13 penetrating through the inside of the tube 11 is pulled from one end of the tube 11, and the other end of the tube 11 is swelled by the shank head 13a. A blind rivet for clamping and fastening the rivets, 8 and 9, wherein the cutting portion of the shank 13 is located within the stop portion 12.