JPS607969Y2 - Set bolt for seat belt - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seatbelt set bolt for assembling a seatbelt fitting to a fastening plate surface of a vehicle body when a seatbelt is attached to an automobile.

Conventional seat belt set bolts of this type vary slightly depending on the vehicle manufacturer, but as shown in Figure 1, after fitting a metal bushing 2 and a synthetic resin bushing 3 to a bolt 1, the seat belt fitting 4 can be rotated. Furthermore, a synthetic resin washer 5, a metal washer 6, a spacer 7, and a spring washer 8 are fitted, and a chrysanthemum-shaped washer 9 is used to prevent them from falling off, so that they are integrally assembled.

However, there are various production problems due to the large number of parts and the difficulty of mechanizing the insertion of chrysanthemum-shaped washers.In addition, the washer may fall off and disassemble during delivery to the vehicle manufacturer, or the surface of the tightening plate may be damaged. Since the bolts are located on the floor of the car body, there are many drawbacks, such as water seeping into the car body through the set bolts when the car is washed after installation, or when it rains, adversely affecting the electrical and mechanical systems.

In order to improve these shortcomings, the present invention greatly reduces the number of parts, saves labor in parts management and assembly, stabilizes quality, and reduces costs.It also ensures that it does not fall off and is easy to install. The object of the present invention is to provide a set bolt for a seat belt that provides a high sealing effect when the seat belt is closed.

Below, one embodiment of the present invention will be described in detail with reference to the drawings. First, as shown in FIG. The shaft portion 10b is shaped to have a diameter larger than that of the threaded portion 10c, and a groove 11 is formed on the circumferential surface of the shaft portion 10b at a predetermined position.
to be engraved.

In addition, as shown in FIG. 3, a spacer 12 made of a hard synthetic resin or metal material with a flange on one end face is attached to the shaft part 10b in such a direction that the flange face abuts the lower face of the bolt head 10a. insert.

This spacer 12 is fitted with a seat belt fitting 13 and locked with a stud 14, which will be described later. However, in order to prevent the seat belt fitting 13 from sticking and not rotating, there is a gap between the lower surface of the flange of the spacer 12 and the stud 14. The height of the spacer 12 is set so that the gap is larger than the thickness of the seat belt fitting 13.

Next, as shown in FIGS. 3 and 4, the spacer 12 is made of flexible synthetic resin and has a length that is approximately equal to the remaining shaft portion 10b excluding the mounting portion, and is attached to the -blade side end surface. In this case, a bush 14 having an annular projection 15 formed thereon that projects toward the threaded portion 10c when fitted onto the shaft portion 10b is inserted into the shaft portion 10b, and a projection 16 provided on the inner circumferential surface of the bush 14 is inserted into the recess. The grooves 11 are fitted to form an integral seat belt set bolt.

As shown in FIG. 5, the set bolt with the above structure is a seat belt fitting 1 for attaching a seat belt (not shown).
3 into the spacer 12 and assemble it so that it can rotate to a certain extent, and at the same time, insert the threaded part 10c into the mounting hole of the designated tightening plate surface 17 such as the floor of the vehicle body and tighten it with the nut 18. used.

To discuss the functions and effects below, firstly, the number of constituent parts has been significantly reduced, and the bushing 14 can be molded from a solid resin material, and assembly can be done by simply inserting each part into the bolt 10 one after another and can be mechanized. In addition to reducing costs and improving quality,
The protrusion 16 is locked in the groove 11 and the bush 1 is attached to the bolt 10.
The bushing 14 and the annular protrusion 15 provided on one side end surface are compressed by the screwing, and are brought into close contact with the tightening plate surface 17 by elastic deformation. completely sealed.

The present application is not limited to the above-mentioned embodiments, and the bushing may be provided with a protrusion on the inner periphery that can be engaged with the shaft of the bolt, and an annular protrusion that can be compressed and deformed on at least one side end surface. For example, as shown in Figure 6A, the end faces may be formed into a cap-shaped flange so that they can be brought into close contact with each other, and they may be symmetrically provided so that the direction is not limited when inserting, or the inner diameter of the bushing may be set closer to both end faces as shown in Figure 6B. It can also be used as a locking means by reducing its diameter.

Further, in the above embodiment, the groove 11 was carved into the shaft of the bolt, but it may not be provided as shown in FIG. It can also be configured to lock more firmly.

Furthermore, the spacer 12 with bushings in the above embodiment
Instead, the flange may be omitted if the material is made of hard synthetic resin that will not cause any problem even if it comes into contact with the lower surface of the metal head, or the spacer may be omitted by integrating the spacer and bolt as shown in Figure 7A. Each of them can be constructed within the scope of the technical idea of the present application.

As described above, the seat belt set bolt according to the present invention exhibits excellent effects such as good productivity and a sealing effect after tightening.

[Brief explanation of the drawing]

Fig. 1 shows a conventional seat belt set bolt, Figs. 2 to 7 all show embodiments of the seat belt set bolt according to the present invention, Fig. 2 is a front view of the bolt, and Fig. 3 shows an embodiment of the seat belt set bolt according to the present invention.
The figure is a longitudinal sectional view of the assembled state, Fig. 4 is a plan view and longitudinal sectional view of the bushing, Fig. 5 is a longitudinal sectional view of the bushing mounted on the fastening plate, and Fig. 6 is a longitudinal sectional view of the bushing and other parts. FIG. 7 is a plan view and a vertical sectional view showing an embodiment of the bolt, and FIG. 7 is a front view showing another embodiment of the bolt. Explanation of symbols, 10, 20, 30...Volt, 1
1.31... Concave groove, 12... Spacer, 13... Seat belt fitting, 14...
・・・Butushu, 15... Annular process, 16...
...Protrusion, 17...Tightening plate surface, 18...
...Natsuto.

Claims (1)

[Scope of utility model registration request] In seat belt set bolts for assembling seat belt fittings to the tightening plate surface of the vehicle body, connect the head of the bolt and the threaded part with at least a shaft part that has a larger diameter than the threaded part, and The seatbelt fitting is provided with a distance retaining means that can be rotatably mounted, and a bushing made of a flexible synthetic resin material with a projection smaller in diameter than the shaft portion on the inner periphery is attached to the shaft portion by the projection. A set bolt for a seat belt, which is fitted into the bushing, and further includes an annular protrusion that is elastically deformable and protrudes toward the screw side from the shaft portion on the end face of the bushing.