JPH11325012A - Rivet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a uniform connection and an effective use of elastic characteristic of push nut. SOLUTION: This rivet comprises a hook locking a claw 9 of a push nut 8 inserted into a body of the rivet. A recess 7 becoming deeper toward the body may be formed on the rear surface of a head 6, a tip of the body may be hollow opened in an end surface, and a tip of the body may be tapered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rivet, and more particularly to a rivet in which a push nut is inserted into a body to fix and join members.

[0002]

2. Description of the Related Art In a conventional rivet, a back surface of a head is formed on a torso of a round bar in a horizontal plane perpendicular to the torso.
Insert the push nut from the tip of the body of the rivet inserted into the through hole of the plate member to be joined, press the push nut against the outer surface of the member through which the tip of the body is inserted, and join and fix the two members It is.

When a claw provided on the push nut is inserted into the body, the claw is pushed open and the tip of the claw is elastically pressed around the body of the rivet to be fixed to the body, and the joint surface of the nut is joined by the nut surface. It presses one side.

[0004]

In many cases, the push nut is inserted into the body of the rivet manually by using a jig. In this case, the technical condition, the degree of fatigue,
A difference occurs in the force acting on the inserted push nut depending on the conditions such as the joining place or the state of the plate surface to be adhered, and the fixing position of the body varies, so that uniform joining cannot be expected.

Further, even if the outer surface of the member is pressed and inserted with the claw having sufficient elastic force, the claw is returned when it is released from the jig due to insufficient clamping force of the tip of the claw with the peripheral surface of the body. As a result, there is a problem that the joining force is reduced and the elasticity of the push nut cannot be fully utilized.

Therefore, the present invention enables uniform joining,
Another object of the present invention is to effectively utilize the elasticity of the push nut, and to provide a rivet having an unprecedented effect.

[0007]

A rivet according to the present invention is characterized in that the rivet has a hook for engaging a claw of a push nut inserted into the body of the rivet, and the rivet is provided on the back of the head. A depression deepening toward the portion may be formed, the tip of the body may be hollow with an open end face, or the tip of the body may be tapered.

The hooking portion of the trunk may be a groove or a ridge, and the groove or ridge may be formed on the entire periphery of the trunk or may be partially provided. Further, the hook portion may be provided only around one specific position of the body portion, or may be provided around a plurality of vertical positions.

When the push nut is inserted into the body of the rivet according to the present invention, the hook of the push nut is prevented from engaging with the hook of the body and returning to the hook. Is formed at a specific position, the position of the push nut is specified, and a uniform joining and fixing action is always achieved.

Also, by providing a recess on the back surface of the head of the rivet, a spring action or a biting action of the head can be expected, and the pressing force can be increased. Further, when an adhesive or a sealant is applied between the joining members and fastened, the sealant has an effect of receiving and storing the adhesive or the sealant leaked from the through hole of the rivet into the recess by pressurization and a sealing effect.

[0011] By making the tip of the body hollow, it is easy to cut off the excess tip after the push nut is attached,
When an adhesive or a sealant is used, an effect of accommodating the adhesive or the sealant leaking into the through hole into the hollow when the trunk is inserted is exerted.

Further, since the tip of the body is tapered, it has an effect of facilitating insertion into the through hole and insertion of the push nut.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an embodiment in which a hook 3 is provided on a body 2 of a rivet 1, and the hook 3 is formed by a concave groove 4. Although the concave groove 4 is formed on the periphery of the same height in accordance with each claw 9 of the push nut 8, the concave groove 4 may be formed on the entire peripheral surface as shown in FIG.

FIG. 3 is a front view showing an embodiment in which the hook portion 3 is a ridge 5, and may be formed partially around the groove like the concave groove 4 in FIG. Further, it may be provided at a plurality of positions. FIG. 4 is a front view showing an example of the ridge 5.

FIG. 5 is a longitudinal sectional front view showing a state of use, in which the body 2 of the rivet 1 is inserted into a through hole 12 provided in the joining members 10 and 10 and pushed from the tip of the body 2 pulled out. Insert the nut 8 and press it.
Is locked to the hook portion 3 and is pressed to ensure reliable fastening.

FIG. 6 is a vertical sectional front view showing an embodiment in which the head 6 of the rivet 1 has a depression 7 which becomes deeper toward the body 2, and when used (FIG. 7), the head 6 is attached to the head 6. When the adhesive and the sealing agent 11 are used between the joining members 10 and 10 by using the spring action or the wedging action to ensure the pressurization with the joining member 10, the material leaked into the through hole 12 due to the pressure is put into the recess 7. And can further improve the sealing performance.

FIG. 8 is a longitudinal sectional front view showing an embodiment in which a hollow portion 13 is formed at the front end portion of the body 2 at the front end surface. That the excess tip can be easily removed,
Also, the adhesive / sealant 11 and the like leaked into the through hole 12 can be accommodated in the hollow 13 at the time of insertion (FIG. 9).

FIG. 10 shows that the tip of the body 2 is tapered.
FIG. 2 is a front view showing one embodiment of the present invention, which facilitates insertion into the through hole 12 and insertion of the push nut 8.

[0019]

As described above, according to the present invention, the hook of the inserted push nut is engaged with the hook provided on the body of the rivet, so that the position at which the push nut stops can be eliminated and uniform joining can be achieved. At the same time, the return is prevented and the force applied in the direction of pulling out the rivet is increased.

The depression on the back surface of the head has the effect of increasing the pressure of the joining member by the spring effect, ensuring the secure fastening, and containing the adhesive leaking from the through-hole and improving the sealing performance. It is.

Further, since the forward portion of the body is hollow, it is easy to cut off an excess portion after fastening the push nut, and the adhesive or the like leaking into the through hole is inserted and stored through the opening at the end face. As a result, an effect that no extra adhesive or sealant adheres to the push nut can be obtained.

Further, by making the tip of the body tapered, there is an effect that the insertion into the through hole and the insertion of the push nut become easy.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a rivet of the present invention.

FIG. 2 is a front view showing another embodiment of the rivet of the present invention.

FIG. 3 is a front view showing another embodiment of the rivet of the present invention.

FIG. 4 is a front view showing another embodiment of the rivet of the present invention.

FIG. 5 is a cross-sectional view showing a use state of the rivet of the present invention.

FIG. 6 is a cross-sectional view showing another embodiment of the rivet of the present invention.

FIG. 7 is a sectional view showing a state of use of the rivet of FIG. 6;

FIG. 8 is a cross-sectional view showing another embodiment of the rivet of the present invention.

FIG. 9 is a cross-sectional view showing a state of use of the rivet of FIG. 8;

FIG. 10 is a front view showing another embodiment of the rivet of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rivet 2 trunk 3 hook 4 concave groove 5 ridge 6 head 7 dent 8 push nut 9 claw 10 joining member 11 adhesive / sealant 12 through hole 13 hollow 14 taper

Claims (5)

[Claims] 1. A rivet having a hook for engaging a claw of a push nut inserted into a body. 2. The rivet according to claim 1, wherein the hook portion is a groove or a ridge. 3. The rivet according to claim 1, wherein the back surface of the head has a depression deepening toward the trunk. 4. The rivet according to claim 1, wherein the front end of the body is hollow with an open end. 5. The rivet according to claim 1, wherein the tip of the body is tapered.