JPH0781501A - Bumper mounting structure of vehicle - Google Patents

Abstract

PURPOSE:To secure excellent waterproofness, mounting, etc., in simple constitution. CONSTITUTION:A quarter panel 1 and a bumper 2 are tightened together with a bolt 10 and a nut 12 with a gasket 12 inserted in between the two at a parting portion 2a. The bolt 10 is formed in step, with a larger diameter in the vicinity of a head portion 10a. The gasket 11 then extends as far as a step portion 10d of the bolt 10, being formed in taper especially in the step portion 10d. The gasket 11 thus is set not only in the parting portion 2a of the bumper 2, but also in the step portion 10d of the bolt 10. Accordingly, the gasket acts also as centering in insertion of the bolt 10 and as seal surfce of the gasket 11, providing high waterproof effect.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a rear bumper on the body side of a passenger car or the like.

[0002]

2. Description of the Related Art In this type of vehicle, as shown in FIG. 2, a rear bumper 2 is attached to a quarter panel 1 of a body. FIG. 3 and FIG. 4 show an example of a connecting structure of the part 2a of the rear bumper 2, in particular, 3 is a retainer, 4 is a bolt, 5 is a gasket, and 6 is a nut. Bolts 4 are provided on the quarter panel 1 and the parting portion 2a.
Bolt holes 1a and 2b for inserting the respective holes are formed.

At the parting portion 2a of the rear bumper 2, bolts 4 and nuts 6 are tightened and fixed so that a gasket 5 is inserted between the part 2a and the end of the quarter panel 1. By thus providing the gasket 5 on the parting portion 2a, the structure prevents water and the like from entering the body from the outside.

[0004]

In the conventional bumper mounting structure, a predetermined tightening force is set when the rear bumper 2 is installed and the bolts 4 and nuts 6 are tightened. However, in particular, the bolt 4 is formed straight, and if the bolt 4 is tightened excessively,
At the parting portion 2a, the rear bumper 2 causes a so-called opening (FIG. 4, arrow B) with respect to the quarter panel 1. If such a mouth opening occurs, the rear bumper 2 expands, and as a result, the gasket 5 is provided on the parting portion 2a, but its waterproofness is significantly affected.

In view of the above points, an object of the present invention is to provide a bumper mounting structure for a vehicle which has a simple structure and can ensure excellent waterproofness and assembling property.

[0006]

A bumper mounting structure for a vehicle according to the present invention has a quarter panel and a bumper parting portion,
A gasket is inserted between them and fastened with bolts and nuts. Particularly, the bolt is formed in a stepped shape with a large diameter near the head, and the gasket is a portion corresponding to the stepped portion of the bolt. Is set up to.

In the bumper mounting structure for a vehicle according to the present invention, the stepped portion of the bolt is formed in a tapered shape.

[0008]

In the vehicle bumper mounting structure of the present invention, the gasket is inserted between the quarter panel and the parting portion of the bumper, and this gasket is further set at the step corresponding portion of the stepped bolt. To be done. As described above, by setting the gasket not only on the part corresponding to the parting part of the bumper but also on the step part of the bolt, the waterproof effect can be significantly improved.

In particular, the step portion of the bolt is preferably formed in a tapered shape, and the tapered step portion has a centering action when the bolt is inserted and a gasket is set. Acts as a sealing surface. Also, by forming the step portion of the bolt in a taper shape in this way,
The bolt can be prevented from being overtightened by exerting a lock function for the nut that is tightened in the threaded portion of the bolt.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a vehicle bumper mounting structure according to the present invention will be described below with reference to FIG.

In the figure, first, a plurality of bolts 10 are set and held by a retainer 3 corresponding to the parting portion 2a of the bumper 2. On the quarter panel 1 and the parting portion 2a,
Bolt holes 1a and 2b for inserting the bolts 10 are formed respectively. In the bolt 10 of the present embodiment, the base portion 10b on the head 10a side is formed to have a larger diameter than the screw portion 10c, and the step portion 10d between the base portion 10b and the screw portion 10c is preferably formed. Is formed in a suitable taper shape, for example. Further, the tip 10e of the bolt 10
Is formed in a tapered shape, for example, R (R) shape.

The gasket 11 is inserted between the quarter panel 1 and the parting portion 2a of the rear bumper 2. The gasket 11 is further provided at a portion corresponding to the stepped portion 10d of the bolt 10 formed in a tapered shape. Is also set. Further, the nut 12 has a threaded portion 12a that is screwed into the threaded portion 10c of the bolt 10, but the nut 12 further includes a mating surface 12 that can correspond to the stepped portion 10d of the bolt 10.
b. The mating surface 12b is preferably formed in a tapered shape that matches the stepped portion 10d of the bolt.

The vehicle bumper mounting structure of the present invention is constructed as described above, and its operation will be described below. The rear bumper 2 is attached to the quarter panel 1 by inserting the gasket 11 between the part 2a of the rear bumper 2 and the end of the quarter panel 1 and tightening the bolt 10 and the nut 12. In this case, since the bolt 10 is provided with the large-diameter step portion 10b, workability particularly when the rear bumper 2 is set on the quarter panel 1 is improved.

Further, the bolt 10 is inserted from its tip portion 10e into the bolt hole 2b of the parting portion 2a, the gasket 11 and the bolt hole 1a of the quarter panel 1, and the nut 12 is screwed into the screw portion 10c. The step portion 10d of the bolt 10 formed in a taper shape is formed in this way.
The guide function when inserting 0 is exhibited, and the work can be performed accurately. Further, by enlarging the base portion 10b and the step portion 10d, damage to the edge of the quarter panel 1 can be prevented, and thus the cause of rust can be eliminated, and the nut 12 can be tightened when tightened.
A proper centering action is exhibited in combination with the mating surface 12b. Therefore, the step portion 10d of the bolt 10 and the nut 12
A high centering accuracy is ensured by the centering action of the mating surface 12b.

Further, the step portion 10d of the bolt 10 and the nut 1
A gasket 11 is set between the two mating surfaces 12b,
Moreover, it is held at a predetermined tightening pressure. By thus providing the gasket 11 even at the corresponding portion of the stepped portion 10d, the sealing property can be significantly improved. In addition, in the step portion 10d of the bolt 10, the screw portion 10
The lock function for the nut 12 tightened in c can be exerted, and the overtightening of the bolt 10 can be effectively prevented. As a result, the opening of the rear bumper 2 at the parting portion 2a (see FIG. 4) can be completely eliminated.

In the above embodiment, the concrete dimensions and the like of the base portion 10b and the step portion 10d of the bolt 10 can be appropriately set as needed, and the step portion 10d is not necessarily a strict taper shape. However, there is no problem, and for example, it may be formed in a slightly curved shape. Further, the shape of the tip portion 10e of the bolt 10 is not limited to the example shown in the figure, and it is possible to change the size appropriately, and in any case, the same operational effect as the above example can be obtained. You can

[0017]

As described above, according to the present invention, in the bumper mounting structure of this type of vehicle, a large diameter stepped bolt is used and its centering surface is effectively utilized to improve the assembling workability. In addition to improving the anticorrosion property of the member, improving the assembling accuracy and the waterproof property, it is possible to effectively prevent the bolt from being overtightened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of essential parts in an embodiment of a vehicle bumper mounting structure according to the present invention.

FIG. 2 is a perspective view of a main part of a vehicle relating to a conventional vehicle bumper mounting structure.

FIG. 3 is an exploded perspective view of a main part of a conventional vehicle bumper mounting structure.

4 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Quarter panel 1a Bolt hole 2 Rear bumper 2b Bolt hole 2a Parting part 3 Retainer 10 Bolt 10a Head part 10b Base part 10c Screw part 10d Step part 10e Tip part 11 Gasket 12 Nut 12a Screw part 12b Mating surface

Claims (2)

[Claims] 1. At the parting between the quarter panel and the bumper,
In a bumper mounting structure for a vehicle in which a gasket is inserted between them and fastened with a bolt and a nut, the bolt is formed in a stepped shape with a large diameter near its head, and the gasket is A bumper mounting structure for a vehicle, wherein the portion corresponding to the stepped portion of the bolt is set. 2. The bumper mounting structure for a vehicle according to claim 1, wherein the stepped portion of the bolt is formed in a tapered shape.