JPS62155316A - Drive pin type rivet having connecting release means - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a fastening effect by press-fitting a driving pin into a hollow cylindrical rivet body, thereby expanding the tip of the rivet body outward. Regarding drive pin type rivets.

Conventional technology Conventionally, this type of drive pin type rivet has been designed to allow the driving pin to be removed from the rivet body as necessary, despite the risk of the driving pin being accidentally handled due to vibration or impact at the point of use. It was not easy to release the fastening action. This has caused some inconvenience in use and handling.

Problems to be Solved by the Invention The present invention has been made in view of these conventional problems, and its purpose is to reliably prevent the driving pin from coming out unexpectedly. However, it is an object of the present invention to provide a drive pin type rivet in which the fastening action can be released by removing the driving pin as necessary.

Means for Solving the Problems In order to achieve the above object, the rivet of the present invention includes a driving pin made of metal with a flange connected to the rear end, a driving pin made of a synthetic resin material, and a narrowed part at the tip. A head is connected to the rear end of a hollow cylindrical body having a pin insertion hole provided therein, and a rivet main body having a plurality of grooves extending in the axial direction at the tip thereof, and the rivet body is molded from a synthetic resin material. A recessed stepped portion that is removably fitted to the head of the rivet body and has a through hole through which the driving pin is inserted, and that locks and holds the flange of the driving pin at the peripheral edge of the through hole; The rivet body with the cap fitted thereon is inserted into the mounting hole of the object to be fastened, and the driving pin is press-fitted to expand the lower end of the rivet body. When the rivet is opened, the flange of the driving pin is locked and held by the cap, and the cap is separated from the rivet body, so that the driving pin can be removed together with the cap. .

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. As shown in FIGS. 1 and 2, the rivet body 3 is formed from a synthetic resin material such as nylon, and has a rear end of a hollow cylindrical body 4 having a pin insertion hole 5 with a narrowed portion 6 at the tip. A head 7 of an appropriate shape is connected to the head 7, and a plurality of grooves 8 extending in the axial direction are provided at the tip. Arc-shaped recesses 9 are formed at four locations on the circumferential side of the head 7.

The driving pin 1 that is press-fitted into the pin insertion hole 5 of the rivet body 3 is made of a metal rod, and has a flange 2 integrally connected to its rear end (see FIG. 5).

3 and 4 show a cap 10 that is removably fitted onto the head 7 of the rivet body 30. The cap 10 is molded from a synthetic resin material such as nylon like the rivet body 3, and has a recessed fitting part 11 shaped to fit over the entire head 7 and a through hole 12 through which the driving pin 1 is inserted. Recessed stepped portion 1 that locks and holds the collar portion 2 at the upper end frontage of 12
3 and a pair of locking claws 14, 14 are provided. Also,
An arc-shaped projection 15 that engages with the recess 9 is provided on the inner circumferential wall surface of the recessed fitting portion 11 and protrudes toward the center.

5 to 7 show examples of the use of a drive pin type rivet having the above-mentioned groove structure. First, as shown in FIG. 5, the rivet main body 3 fitted with the cap 10 is inserted into the mounting hole 23 provided in the member to be fastened 21, 22.
Insert the driving pin 1 into the pin insertion hole 5 of the rivet body 3 through the through hole 12 of the cap]O, and insert the flange 2 into the cap 1.
0 into the recessed stepped portion 13. By press-fitting the driving pin 1, the lower end of the rivet body 3 expands as shown in FIG. 6, and the fastened members 21 and 22 are firmly fastened by the head 7 and the expanded legs 16. . At the same time, the flange portion 2 of the driving pin 1 is fitted into the recessed stepped portion 13 of the cap 10, and is retained and retained on the cap 10 by the locking pawl 14. Therefore, the driving pin 1 will not be accidentally released from the rivet body 3 due to vibration or impact.

On the other hand, when it becomes necessary to release the fastening action of the rivet main body 3 (for example, to separate the fastened members 21 and 22), first grasp the cap 10 with your fingers and rotate it a little, then push it out. The engagement between the portion 15 and the recessed portion 9 is disengaged (
(See imaginary line in Figure 6). Thereafter, when the cap 10 is pulled in the axial direction, the driving pin 1 is pulled out together with the cap 10, as shown in FIG. 7, and the fastening action by the rivet body 3 is released. Therefore, the rivet body 3
If the screws are removed from the hole 23, the members to be fastened 21°22
can be easily separated.

FIG. 8 shows an example in which the rivet body 7a is shaped like a socket. In this embodiment, a cap 10a is removably fitted into a socket 17 formed on the head 7a, and a recess 19 provided in the middle of the cap 10a is inserted into the socket 17.
It engages with a protrusion 18 provided on the periphery of the opening. The method of use is exactly the same as in the above embodiment.

As described in detail, in the rivet of the present invention, the driving pin is held in place by the cap fitted on the rivet body when in use, so that it cannot be accidentally pulled out from the rivet body due to vibration or impact. There is no risk of it coming out, and a stable fastening action can be obtained.

Furthermore, by separating the cap from the rivet body as necessary, the driving pin can be removed together with the cap, so that the fastening action can be easily released. In addition, since the driving pin itself does not have a means for releasing the fastening, all that is required is the same press-fitting work as with conventional products, and since the rivet body and cap are pre-assembled and integrated, it is possible to easily automate the fastening work. It is necessary. Furthermore, since the driving pin is made of metal, there is an advantage that a large fastening force can be applied.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the rivet body, FIG. 2 is a plan view of the same, FIG. 3 is a partially cutaway front view of the cap, and FIG. 5 to 7 are explanatory diagrams of the method of use, and FIG. 8 is a longitudinal sectional front view showing the usage state of another embodiment. 1... Drive pin 2... Flange 3... Rivet body 4... Hollow cylindrical body 5... Pin insertion hole
6... Narrowed portion 7... Head 8... Division groove 9... Concave portion 10... Cap 11
... Recessed fitting part 12 ... Through hole 13 ... Recessed step part 14 ... Locking claw 15 ... Protrusion 1
6... Leg patent applicant Morinaka Engineering Co., Ltd. Figure 7 Figure θ

Claims (3)

[Claims] (1) A metal driving pin with a flange connected to the rear end, and a head connected to the rear end of a hollow cylindrical body made of synthetic resin material and having a pin insertion hole with a narrowed part at the tip. A rivet body is provided with a plurality of grooves extending in the axial direction at the tip thereof, and is molded from a synthetic resin material and is removably fitted into the head of the rivet body, and the driving pin is attached to the head of the rivet body. The cap has a through hole to be inserted, and a cap is provided with a recessed step and a locking pawl for locking and holding the flange of the driving pin on the peripheral edge of the through hole, and the cap is fitted. Press-fitting the driving pin with the rivet body inserted into the attachment hole of the object to be fastened, expanding the lower end of the rivet body, and causing the flange of the driving pin to be locked and held by the cap; A drive pin type rivet comprising a fastening release means configured such that the driving pin can be removed together with the cap by separating the cap from the rivet main body. (2) An arcuate recess is provided on the circumferential side of the head of the rivet body, a recess fitting part is provided on the cap to fit over the head of the rivet body, and an inner circumferential wall surface of the recess fitting part is provided. A fastening release means according to claim 1, wherein a protruding arc-shaped protrusion engages with the arc-shaped recess so that the cap is removably fitted to the rivet body. Drive pin type rivet. (3) A drive pin type rivet equipped with fastening release means according to claim 1, wherein the head of the rivet main body is formed into a socket shape, and the cap is removably fitted into the socket part. .