JPS5921979Y2 - Automotive bumper mounting structure - Google Patents

Description

[Detailed description of the invention] The invention relates to a structure for attaching a bumper to a vehicle body.
Especially when installing this grommet
The present invention relates to an automobile bumper mounting structure in which a bumper mounting structure is provided.

In conventional automotive bumper mounting structures with grommets, the outer surface of the grommet is hard and smooth, and by loosely fitting the bumper bracket onto the outer surface, it is possible to absorb alignment variations during bumper installation. It is being done.

However, with this conventional bumper mounting structure,
There are the following problems.

(1) Since the bracket of the bumper is loosely fitted to the outer surface of the grommet, the bracket is not fixed, which causes the bumper to vibrate.

(2) Since the outer surface of the grommet is hard and smooth, the bracket hits the grommet when the bumper vibrates, causing abnormal noise.

(3) In order to prevent the above-mentioned vibrations and abnormal sounds from occurring, it is necessary to provide separate parts.

(4) Since there is a risk that the bumper bracket may come off from the grommet, it is necessary to provide a stopper.

This invention attempts to solve these problems.
The object of the present invention is to provide an automobile bumper mounting structure that prevents the generation of vibrations and abnormal noises and simplifies assembly.

Therefore, the automobile bumper mounting structure of the present invention is provided with a grommet for mounting the bumper bracket on the vehicle body, and the grommet is inserted into a notch (hole) formed in the bracket at a predetermined position along the central axis direction of the grommet. The grommet is characterized by having a large number of protrusions distributed in the direction of its central axis and having elastic restoring force formed on the outer surface of the grommet so as to be engaged with the inner edge of the grommet.

Hereinafter, a bumper mounting structure for an automobile as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is an overall perspective view showing an automobile equipped with the bumper mounting structure, and Fig. 2 is a line along the arrow P in Fig. 1. 3 is an enlarged cross-sectional view taken along the arrow line III--III in FIG. 2, FIG. FIG. 5 is a view taken along arrows V to ■ in FIG.

As shown in FIGS. 1 and 2, in order to attach the corner portion 2a of the bumper 2 to the vehicle body 1, a grommet 3 made of synthetic resin or rubber is attached to the vehicle body 1 via a screw 4, as shown in FIG. Fixed.

When fixing this grommet 3 to the vehicle body 1, first insert the cut end 3a of the grommet 3 into a square hole (not shown) formed in the vehicle body 1, and then Through holes 3b (fourth and fifth
By pushing the screw 4 into the grommet 3 (see figure), the cut end 3a of the grommet 3 is expanded in its radial direction, as shown in FIG.

The other end 3C of the grommet 3 fixed to the vehicle body 1 in this manner projects from the outer surface of the vehicle body 1.

By the way, the outer surface of this other end portion 3C has a chevron cross-sectional shape 5.
A large number of annular protrusions 5 are formed so as to be distributed in the direction of the central axis C of the grommet 3.

Since these annular projections 5 are made of the same material (synthetic resin or rubber) as the grommet 3, elastic restoring force is generated by the bending of the annular projections 5, as will be described later.

A thin metal plate or resin bracket 6 provided at each corner portion 2a of the bumper 2 is engaged with the outer surface of the grommet 3 having a large number of annular protrusions 5.

That is, as shown in FIG. 5, the bracket 6 has a notch 6a formed therein so that the inner edge of the notch 6a engages with the annular protrusion 5 formed on the outer surface of the grommet 3. It has become.

During this attachment, the inner edge of the notch 6a is connected to the annular projection 5.
The chevron-shaped cross-sectional shape 5a' is bent as shown in FIG. 4, and the elastic restoring force accompanying this bending ensures that the bracket 6 and the grommet 3 are firmly and reliably engaged at a predetermined position along the central axis direction of the grommet 3. This ensures that vibrations and abnormal noises are sufficiently prevented.

Further, when the notch 6a of the bracket 6 is pushed in, it is engaged with the chevron-shaped cross-sectional portion 5a' of the protrusion 5 corresponding to the pushed-in position, and the vertical wall 5b of the chevron-shaped cross-sectional portion 5a adjacent thereto is engaged. Accordingly, the bracket 6 is indicated by the arrow 7.
This prevents the bracket 6 from being pulled out in the direction of , thereby ensuring the positioning of the bracket 6 and firmly attaching the bumper 2 to the vehicle body 1.

Note that the cutout portion 6a of the bracket 6 may be formed as a hole.

In this case, the bracket 6 may be pushed in from the other end 3c' of the grommet 3 in the direction opposite to the arrow 7. When pushing the bracket 6, as is clear from FIG. Since 5a is formed of an inclined surface and an upright wall 5b, it can be pushed in smoothly.

Also, once pushed in, the bracket 6
is prevented from moving in the direction of arrow 7.

Furthermore, the protrusion on the outer surface of the grommet 3 has a chevron cross-sectional shape 5.
Instead of being formed as an annular protrusion 5 having a shape of 1.a, it may be formed as a rod-like or plate-like protrusion having elastic restoring force, and in this case as well, a large number of protrusions are arranged so as to be distributed in the direction of the central axis of the grommet 3. Ru.

As described in detail above, according to the automobile bumper mounting structure of the present invention, the notch of the bracket in the bumper of the vehicle body is formed of a large number of protrusions distributed in the direction of the central axis on the outer surface of the grommet and having elastic restoring force. Since the grommet is firmly held by engaging with either of the two, in other words, at any predetermined position along the center axis of the grommet, manufacturing or assembly errors may occur in the bracket or its notch. However, the bumper can be reliably attached to the vehicle body without causing vibration or abnormal noise, and the assembly work is advantageously simplified significantly.

[Brief explanation of the drawing]

Figures 1 to 5 show an automobile bumper mounting structure as an embodiment of the present invention. Figure 1 is an overall perspective view of an automobile equipped with the bumper mounting structure, and Figure 2 is the same as in Figure 1. P
A partial plan view seen from the arrow line, Fig. 3 is lll- of Fig. 2.
FIG. 4 is an enlarged sectional view taken along the line indicated by the arrow III, FIG. 4 is a detailed view showing the outer surface of the grommet enlarged and partially cut away, and FIG. 5 is a view taken along the line ■-■ in FIG. 1...Vehicle body, 2...Bumper, 2a...
...Part of the corner of the bumper 2, 3...Grommet, 3a...One end of the grommet 3, 3b.
...Through hole, 3C...Other end of grommet 3, 3c'...Other end of grommet 3, 4...
... Screw, 5 ... Annular projection, 5a. 5a'...Chevron shaped section, 5b...
- Vertical wall of chevron-shaped cross-sectional portion 5a, 6... Bracket, 6a... Notch part of bracket 6, 7.
...Arrow, C... Central axis of grommet 3.

Claims (1)

[Scope of utility model registration request] A grommet for attaching a bumper bracket to the vehicle body is provided, and a grommet is provided on the outer surface of the grommet to engage the inner edge of a notch formed in the bracket at a predetermined position along the central axis direction of the grommet. A bumper mounting structure for an automobile, characterized in that a large number of protrusions are formed that are distributed in a direction and have an elastic restoring force.