JPS6036970B2 - Bumper structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a bumper structure in which a decorative bumper is attached to the surface of a resin bumper molded from synthetic resin, rubber, or the like.

Conventionally, such a bumper
As shown in Figures 1 and 2, a decorative bumper D made of metal is attached to the top of a resin bumper R made of synthetic resin such as polypropylene, glass fiber reinforced plastic, polyvinyl chloride, or rubber. 13 and a nut 6.

However, such resin bumper R and decorative bumper D
There is a large difference in physical properties, especially in the coefficient of thermal expansion, and in cold regions, tropical regions, or where there is a large difference in temperature There is a problem that distortion, deformation, etc. occur, and in addition, there is a problem that the workability of the installation work is poor because a large number of decorative bolts 13 and nuts 6 are used to secure the space between them. This invention solves various problems with such conventional bumpers.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the first embodiment shown in FIGS. 3 to 6, a metal decorative bumper D divided into three parts is attached along the upper wall of the resin bumper R.

Decorative bumper D is bumper side 3 of resin bumper R.
Both side divided parts la covering the upper wall of the and these both side divided parts la
A central dividing portion l that is sandwiched between and covers the upper wall of the bumper central portion 4.
b, and both ends of the central divided portion lb fit under one end of the both side divided portions la, and overlap each other to form a wrap portion 2. As shown in FIG. 4, each of the side divided portions la has a hidden bolt 5 attached to its lower surface, and is fixed to the resin bumper R by the hidden bolt 5 and nut 6. Moreover, the central dividing part lb is the fifth
As shown in the figure and FIG. 6, pot-shaped portions 7 are formed at both ends of the cross-sectional shape, and one of the hook-shaped portions 7 is hooked to the end of the center portion of the upper wall of the resin bumper R. The other hook-shaped portion 7 is elastically hooked onto a plurality of clips 8 integrally formed on the shoulder portion of the resin bumper R. in this way,
The central dividing portion lb is held by the wrap portion 2 and the clip 8 on the upper wall of the resin bumper R so as to be movable in the longitudinal direction thereof. In the above embodiment, the upper end of the clip 8 is formed at a free end 9 separated from the main body of the resin bumper R, as shown in FIG. 7, but as shown in FIG. , the lower end may be formed into a free end 9' that is cut off.

In addition, as shown in FIGS. 8 and 9, the clip 8 has a thin wall portion 1 which is integrally connected to the main body of the resin bumper R at both ends, and is elastically formed by deforming the thin wall portion 10. It is also possible to engage the hook-shaped portion 7 of the central dividing portion lb. Furthermore, as shown in FIG. 10, the center dividing part lb is attached by providing an engaging groove 11 in the shoulder part of the resin bumper R along its longitudinal direction, and forming a downwardly directed lip at the end of the central part of the upper wall. 12 may be provided in a protruding manner, one of the fishing portions 7 of the central dividing portion lb may be locked in the engaging groove 11, and the other hook portion 7 may be elastically engaged with the lip 12. Further, as shown in FIG. 11, engagement grooves 11 are provided along the longitudinal direction at the shoulder portion of the resin bumper R and at the end of the center portion of the upper wall, respectively.
The fishing portions 7 of the central divided portion lb may be elastically engaged with the engagement grooves 11, respectively.

Next, in the second embodiment shown in FIG. 12, the decorative bumper D is divided into two parts, which overlap each other at the center of the bumper B to form a lap part 2.

The decorative bumper D is attached to the resin bumper R by fixing the bumper B at both ends with decorative bolts 13, and the central portion is movably attached as in the first embodiment. As described above, in the bumper B of the present invention, the decorative bumper D attached to the surface of the resin bumper R is divided into an appropriate number of divided parts 1, and these divided parts 1 form the wrap part 2 and are connected. Therefore, even if the resin bumper R and the decorative bumper D expand or contract with different coefficients of thermal expansion in cold regions, tropical regions, or in cases where there is a large temperature difference, the overlap of the wrap portions 2 will not be affected. Differences in expansion or contraction can be absorbed depending on the size.

Therefore, an unreasonable force due to the difference in the coefficient of thermal expansion is not applied to the portion where the decorative bumper D is fixed to the resin bumper R using the hidden bolts 5, decorative bolts 13, etc.
It is possible to completely prevent either the resin bumper R or the decorative bumper D from being distorted or deformed. Moreover, in the first embodiment, the decorative bumper R
The central dividing part lb is movably attached to the upper wall of the resin bumper R, and the both side dividing parts la covering the upper wall of the relatively short bumper side 3 are only fixed to the resin bumper R. Differences in expansion and contraction due to differences in thermal expansion coefficients can be smoothly absorbed by the wrap portion 2, and in the installation work, the center dividing portion lb is first placed on the center of the upper wall of the resin bumper R, and then the both side portions are attached. All you have to do is clean the part la and fix it with the bolt 5 and nut 6 to form the lap part 2, which is easier to work with compared to the attachment work of a subordinate which fixes both parts with a large number of decorative bolts 13 and nuts 6. will improve. Further, in the case of the second embodiment, the decorative bumper D is divided into two divided parts 1, and the bumper B
Since the wrap portion 2 is only formed at the center of the bumper, the wrap portion 2 does not detract from the actual feel of the bumper, and there is an advantage that the decorative bumper D can be formed by two types of press working.

Incidentally, in the above embodiment, the case where the decorative bumper D is divided into three parts and the case where it is divided into two parts is explained, but it is divided into a large number of four or more parts, and each divided part is combined into an armor shape to form three or more lip parts. The split parts located at both ends may be fixed to the resin bumper, and the split part located in the middle may be fixed only at one location.

Further, the present invention is applicable not only to the upper wall of the bumper but also to the case where the decorative bumper is attached to the front wall or the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional bumper, FIG. 2 is a sectional view along the Rolo line of FIG. 1, FIG. 3 is a perspective view of a bumper according to the first embodiment of the present invention, and FIG. 5 is a sectional view taken along the line V-V in FIG. 3, FIG. 6 is a partial perspective view showing the clip in FIG. 5, and FIG. 7 is a third view showing a modified example of the clip. 8 is a sectional view taken along line V-V of FIG. 3 showing another modification of the clip, FIG. 9 is a partial perspective view showing the clip of FIG. 8, and FIG. 10 is a sectional view taken along line V-V of FIG. 11 is a cross-sectional view showing a modified example of the attachment state in the central division of the decorative bumper, FIG. 11 is a cross-sectional view showing another modified example similar to FIG. 10, and FIG. 12 is a bumper according to a second embodiment of the present invention. FIG. B... Bumper, R... Resin bumper, D... Decorative bumper, 1... Divided part, la... Side divided part, l
b...Central division part, 2...Wrap part, 8...Clip. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12

Claims (1)

[Claims] 1. On the surface of the resin bumper R molded from resin, rubber, etc.,
In a bumper B to which a decorative bumper D made of a material different from that of the resin bumper R is attached, the decorative bumper D is divided to form an appropriate number of divided parts 1, and each divided part 1 is divided into two parts.
A bumper characterized in that the ends of the resin bumper R and the decorative bumper D are overlapped and connected to form a wrap part 2, and the difference in thermal expansion between the resin bumper R and the decorative bumper D is absorbed by the wrap part 2. structure. 2 The decorative bumper D is divided into three parts, the two side divided parts 1a are fixed to the resin bumper R, and the central divided part 1b
The central divided part 1b is held movably in the longitudinal direction by a wrap part 2 formed by both ends of the resin bumper R and one end part of the both-side divided parts 1a. Bumper structure as described in scope 1. 3. The bumper structure according to claim 2, wherein the resin bumper R is integrally molded with a clip 8 for attaching the center dividing portion 1b slidably along its longitudinal direction.