JPS61271151A - Installation structure of bumper side section for automobile - Google Patents

Abstract

PURPOSE:To improve the workability of the bumper installation by configurating a device in such a way that a positioning projection, which permits a bracket to be positioned on the back side of a bumper while it is engaged with the bracket, is formed so that it allows the bracket to move while it is deformed by a force greater than the specified one. CONSTITUTION:In installing a bumper, a retainer 25 is first fitted into each of plural guide plates 23b which are formed in a bumper side section 23. Then, a bolt 27 is screwed into a welded nut of the retainer 25 through a bracket through-hole 26b. This causes a bracket 26b to be secured to the retainer 25 allowing a positioning projection 23d which is projected from the bumper side section 23, to be inserted into a positioning hole 26e which is formed on the bracket 26. Subsequently, the bumper side section 23 equipped with the bracket 26 is bolted together with a bumper main body through an installation hole 23f and the like. Thus, this configuration allows the bracket 26 to be positioned by means of the positioning projection 23d, so improving the workability of the bumper installation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for supporting a bumper side portion made of resin so as to be slidable in the longitudinal direction of a vehicle relative to a vehicle body panel.

Conventionally, some automobiles have been equipped with a resin bumper (rear bumper 1 in the figure), as shown in FIG. Some bumpers 1 of this type are divided into three parts, for example, a bumper main body part 2 and a pair of bumper side parts 3.
The entire bumper 1 is supported by the vehicle body 4 by a stay (not shown) attached to the bumper body 2, and the bumper side portions 3 are also attached to the vehicle body 4 to prevent vibrations and the like during driving.

As shown in FIGS. 10 and 11, this bumper side portion 3 has a total of three guide portions 3a integrally molded on the back side in line with the longitudinal direction of the vehicle, and a retainer is attached to each of these guide portions 3a. 5, 5.5 is attached so that it can slide freely,
A long plate-shaped bracket 6 is attached to these retainers 5, 5, 5 with bolts 7. By fixing this bracket 6 to a rear fender 9, which is a vehicle body panel, with bolts 8, the bumper side portion 3 is supported so as to be slidable in the longitudinal direction of the vehicle surface relative to the rear fender 9. By attaching it in this way, vibration of the bumper side part 3 is prevented when the vehicle is running, and at the same time, in the event that the resin bumper 1 is thermally deformed, the guide part 3a on the bumper side part 3 side can be attached to the retainer on the rear fender 9 side. 5 to absorb deformation (Utility Model No. 57-6974)
(See Publication No. 3).

However, this conventional bumper side mounting structure has the following problems. That is, the bumper assembly method involves fixing the bracket 6 to the retainer 5 which is slidably attached to the bumper side part 3, and then assembling the bumper side part 3 and the bumper main body part 2.
This substantially U-shaped bumper assembly is supported by a stay on the vehicle body 4, and a bracket 6 on the side of the bumper side portion 3 is fixed to the rear fender 9. However, when installing this bracket 6, it is necessary to align the weld nut 10 fixed to this bracket 6 with the insertion hole 9a drilled in the rear fender 9, but the bracket 6 does not fit with the bumper side part 3. Therefore, it is difficult to attach the bracket 6 to a predetermined position on the bumper side part 3, and when the bumper assembly is aligned with the vehicle body 4, the weld nut 10 of the bracket 6 and the rear fender 9 There are cases where the bumper does not align with the insertion hole 9a, and it takes time and effort to adjust the slide position of the bracket 6 again, which poses a problem in that it requires a great deal of effort to attach the bumper.

In order to solve this problem, in the present invention, a bracket is attached to a guide part formed on the back side of a bumper side part made of resin so as to be slidable in the longitudinal direction of the vehicle. is fixed to a vehicle body panel, and the bumper side portion is supported slidably in the longitudinal direction of the vehicle surface with respect to the vehicle body panel. A bumper side part for an automobile having a positioning protrusion that engages with the bracket for positioning and is deformed or broken by a force exceeding a predetermined level when the bumper side part is thermally deformed to enable the movement of the bracket. It is characterized by a mounting structure.

According to this method, when the bracket is attached to the guide portion formed on the bumper side portion, the bracket is positioned at a predetermined position with respect to the bumper side portion by the positioning protrusion formed on the bumper side portion. That will happen. When supporting this bumper side part on the car body, a bracket is fixed to the car body panel, but in this case, the bracket is positioned at a predetermined position, so when the bumper side part is aligned with the car body panel, the bracket is fixed to the car body panel. The fixing weld nut provided on the bracket and the insertion hole drilled in the vehicle body panel fit snugly, making it easy to tighten the bolts, thereby significantly improving bumper installation workability.

In addition, if the bumper expands or contracts due to the influence of heat after the bumper is installed, more force than a predetermined amount is applied to the positioning protrusion that engages with the bracket, causing the protrusion to deform or break. As a result, relative movement between the bracket and the bumper side portion becomes possible, that is, the bumper side portion slides with respect to the vehicle body panel, thereby absorbing thermal deformation.

Actual value 11 Hereinafter, this invention will be explained based on examples.

1 to 5 are diagrams showing a first embodiment of the present invention.

First, to explain the structure, the resin bumper in this embodiment is, for example, a rear bumper 21, and this bumper 21 has a bumper main body part 22 and a pair of bumper side parts 23.
The bumper main body portion 22 is supported by the vehicle body 24 by a stay (not shown), and the side portions 23 are also supported by the vehicle body 24 in the following manner.

That is, in this bumper side portion 23, a total of three guide portions 23b are integrally molded in an upper portion 23a on the back side and are lined up in the longitudinal direction of the vehicle. The guide portion 23b has a pair of sliding portions 23c each having a rectangular cross-section, which are vertically opposed to each other. 25.

25 is slidably attached, and this retainer 25 is slidable in the longitudinal direction of the vehicle. Brackets 26 are fixed to these retainers 25. The bracket 26 has a generally long plate shape, and the upper plate portion 26a has a total of three insertion holes 26b at predetermined positions, while the lower plate portion 26c has a total of three insertion holes 26b at predetermined positions. Weld nuts 26d are joined. The bolts 27 are inserted into the respective insertion holes 26b of the upper plate part 26a of the bracket and screwed into the weld nuts 25a joined to the retainer 25.

A bracket 26 is fixed to the retainer 25. Furthermore, this bracket 26 is fixed to a rear fender 28, which is a vehicle body panel. That is, this rear fender 28 has an insertion hole 28a formed at a predetermined position, and a bolt 29 is inserted into the bracket 26 from the inside of the vehicle through this hole 28a.
This bracket 26 is fixed to the rear fender 28 by being screwed into the weld nut 26d.

By the way, the bumper side portion 23 has a guide portion 23b.
A positioning protrusion 23d for positioning the bracket 26 is integrally molded between them, and a positioning hole 26e into which the protrusion 23d is inserted and engaged is bored in the bracket 26. The positioning protrusion 23d is located on the bumper side portion 2.
The notch portion 23e is formed on the base side so as to be formed thin so that it will break when a predetermined force or more generated during the thermal deformation of No. 3 is applied.

Further, the bumper side portion 23 is provided with a mounting hole 23f on the rear end side of the vehicle for bolting and fixing to the bumper main body portion 22.

Next, the operation of the mounting structure for the bumper side portion having such a configuration will be explained.

First, to explain the bumper mounting method, first, on the plurality of guide parts 23b formed on the bumper side part 23,
A retainer 25 is attached to each. Next, the bracket insertion holes 2 are inserted into the weld nuts 25a of these retainers 25.
By screwing the bolt 27 through the bolt 6b, the bracket 26 is fixed to the retainer 25, and at the same time, the positioning protrusion 23d protruding from the bumper side portion 23 is inserted into the positioning hole 26e formed in the bracket 26. (See Figure 4). The bracket 26 is now positioned and mounted at a predetermined position relative to the bumper side portion 23.

Thereafter, the bumper side portion 23 with the bracket 26 attached thereto is bolted to the bumper main body portion 22 through the attachment hole 23f or the like. Then, align the roughly U-shaped bumper assembly with the vehicle body 24 on the line and place it on the bumper body 24.
2 is supported on the vehicle body 24 by a stay (not shown), and
A bracket 26 attached to the bumper side portion 23 is fixed to the rear fender 28.

That is, the bracket 26 is fixed to the rear fender 28 by inserting the bolt 29 from the inside of the vehicle into the insertion hole 28a of the rear fender 28 and screwing it into the weld nut 26d of the bracket 26. When fixing this,
Since the bracket 26 is positioned with respect to the bumper side portion 23 by the positioning protrusion 23d, when the bumper assembly is aligned with the vehicle body 24, the weld nut 26d provided on the bracket 26 and the insertion hole drilled in the rear fender 28 28a will fit perfectly,
The operator does not need to adjust the position by sliding the bracket 26 as in the conventional case, and the bolt 29 can be tightened very easily, resulting in a marked improvement in bumper installation workability.

By supporting the bumper side portion 23 on the rear fender 28 in this manner, vibrations are prevented when the vehicle is running. At the same time, when the rear bumper 21 expands or contracts due to the influence of heat, the bumper side portion 23 tends to slide against the retainer 25 fixed to the vehicle body 24 side, so it cannot be inserted into the insertion hole 26a of the bracket 26. A predetermined force or more is applied to the engaged positioning protrusion 23d of the bumper side portion 23. Then, the positioning projection 23d is bent as shown in FIG. 5, and the bumper side portion 23 and the vehicle body 24 are bent.
It becomes possible to move relative to the side bracket 26, and thermal deformation can be absorbed satisfactorily.

By the way, in this embodiment, the positioning protrusion 23d
A notch 23e is formed on the base side of the protrusion 23d.
Although the notch 23e is made easy to break, it is needless to say that this notch 23e is not necessarily necessary and may be simply made thin.

Further, FIGS. 6 to 8 show a second embodiment of the present invention.

In this embodiment, the position of the positioning protrusion 33d formed on the bumper side portion 33 is different from that of the above embodiment. That is, the positioning protrusion 33d contacts the front edge 26f of the bracket 26 and
6 is formed on the front end side of the bumper side portion 33 of the vehicle. Of course, during thermal deformation, the positioning protrusion 33d is bent due to the movement of the bumper side portion 33, as shown in FIG. In this case, it is not necessary to form the positioning hole 26e in the bracket 26 as in the above embodiment, and the same bracket as the conventional one can be used. The other configurations and operations are the same as those in the first embodiment, so their explanations will be omitted.

In addition, in each of the above embodiments, the positioning protrusion 23d.

33d is designed to be bent, but the invention is not limited to this. These protrusions 23d, 33d may be configured to deform, and even if this is done, the bumper side portion 23.33 and the bracket will be bent when thermally deformed. Movement relative to 26 is possible.

As explained above, according to the present invention, by forming a positioning protrusion for positioning the bracket on the bumper side part, the bracket can be positioned using the protrusion when installing the bumper, thereby improving the efficiency of the bumper installation work. It can be improved significantly and moreover.

During thermal deformation, this positioning protrusion breaks or deforms, thereby allowing the bumper side portion to slide and absorbing the deformation, which is a practically beneficial effect.

[Brief explanation of drawings]

1 to 5 are diagrams showing a first embodiment of a mounting structure for a bumper side portion of an automobile according to the present invention. Fig. 1 is an exploded perspective view showing the bumper side part, bracket, etc., Fig. 2 is a perspective view of the automobile, and Fig. 3 is the same as in Fig. 2.
4 is a sectional view taken along line rV-rV in FIG. 2, and FIG. 5 is a sectional view taken along line rV-rV in FIG.
6 to 8 are diagrams showing a second embodiment of the present invention, FIG. 6 is an exploded perspective view corresponding to FIG. 1, and FIGS. 7 and 8 are respectively 4 and 5, FIGS. 9 to 11 are views showing conventional examples, FIG. 9 is a perspective view of the automobile, and FIG. 10 is the first
FIG. 11 is an exploded perspective view corresponding to the figure, and a sectional view taken along the Xia-U line in FIG. 9. 21... Rear bumper (bamba), 23.33... Bumper side part, 23b... Guide part, 23d, 33d... Positioning protrusion, 24... Vehicle body, 26... Bracket, 28...・Rear fender. Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] A bracket is attached to the guide part formed on the back side of the resin bumper side part so as to be slidable in the longitudinal direction of the vehicle, and the bracket is fixed to the vehicle body panel, so that the bumper side part is attached to the vehicle body panel. In a mounting structure for an automobile bumper side part that is slidably supported in the longitudinal direction of the vehicle, the bracket is engaged with the bracket on the back side of the bumper side part for positioning, and when the bumper side part is thermally deformed. A mounting structure for a bumper side portion of an automobile, characterized in that a positioning projection is formed that is deformed or broken by a force exceeding a predetermined value to enable movement of the bracket.