JPS606358Y2 - automotive bumper - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an automobile bumper.

Conventionally, automobile bumpers have been provided with a back plate extending in parallel over almost the entire length on the back surface of the bumper body, and the bumper has been attached to the vehicle body via this back plate, and the necessary rigidity has been provided to the bumper.

However, if the bumper body and the back plate are used to resist the impact load in this way, the rigidity of the entire bumper becomes too high, causing the problem that the impact load is directly transmitted to the vehicle body via the stay.

Therefore, the present invention aims to provide a bumper for an automobile in which a back plate has a curved portion with both ends thereof greatly curved toward the vehicle body so that a slight impact load can be absorbed by the bumper itself. It is.

Hereinafter, this invention will also be explained in detail based on an example of a resin bumper shown in the drawings.

The bumper body 1 is arranged at the front or rear of the vehicle body,
The bumper body 1 has the function of protecting or decorating the vehicle body, has a length spanning the entire width of the vehicle, and is made of synthetic resin with an open cross section on the vehicle body side.As shown in FIG. The back plate 2 is made of metal and has a U-shaped cross section, and as shown in FIGS. 1 and 3, the inner portion of the back plate 2 is slightly curved toward the vehicle body side to form a curved portion 2a. The back plate is inserted and fitted over its entire length, and the back plate is fastened to horizontal ribs la and lb provided on the back surface of the bumper body with bolts 3 inserted vertically as shown in FIG.

In particular, the positions where the back plate 2 and the bumper body 1 are connected by the bolts 3 are, as shown in FIG. There are multiple locations in the center extending parallel to 1.

A stay 4 for attaching a bumper to the vehicle body is fixed to the curved portion 2a of the back plate 2 in a parallel manner toward the front and rear.

Furthermore, lamps 5 are housed in the space between the front surface of the curved portion 2a of the back plate 2 and the bumper body 1, and are attached to the front surface of the bumper body 1.

6 is a lens through which the light from the lamp 5 is transmitted.

The automobile bumper thus constructed is attached to the vehicle body via the stay 4.

As explained above, this idea consists of a bumper body made of synthetic resin, a metal back plate fixed to the back of the bumper to give it the necessary rigidity, and a stay attached to the back plate to attach it to the vehicle body. In an automobile bumper, a bumper body is provided with a pair of upper and lower horizontal ribs extending parallel to each other along the vehicle width direction, and a back plate is provided with a length that spans almost the entire length of the bumper body in the vehicle width direction,
Moreover, the cross section thereof is made into a uniform U-shape over the entire length, and a portion slightly inside from both ends of the back plate is greatly concavely curved directly toward the vehicle body, thereby forming a curved portion in the back plate itself. hand,
Connect the upper and lower horizontal ribs of the bumper body and the upper and lower horizontal parts of the back plate to the vehicle body at one location on each end of the back plate excluding the curved portions above, and at multiple locations in the center of the back plate between both curved portions. At the same time, the tops of both curved parts are attached to the vehicle body via the stays, so when an external impact load is applied to the bumper body at a position near the center between the stays (for example: In the event of a frontal collision), the bumper body curves concavely toward the vehicle body using the connecting bolts at both ends of the back plate as fulcrum trees, and the back plate curves concavely toward the vehicle body at a position inside the stay to absorb and alleviate the impact load. This can improve the safety of the occupants.

Additionally, when an external impact is applied to one end of the bumper body, the bumper body curves to rotate around the connecting bolt at the end of the back plate on the side where the external impact was applied, and the back plate , the impact load can be absorbed and alleviated by bending and deforming from the curved portion on the outside of the stay at the same side end, and the safety of the occupant can be improved.

Furthermore, by curving the vicinity of both ends of the back plate toward the vehicle body, a space can be formed between both curved parts of the back plate and the bumper body, and lamps can be stored in this space.

Furthermore, since the stays are attached to the tops of both curved portions curved toward the vehicle body near both ends of the back plate, the stays can be short and simple.

In particular, the back plate has a simple U-shaped cross section that is uniform over the entire length, and inexpensive channel steel can be used, and the curved portion can be easily and inexpensively formed using braces or the like.

Further, since the bumper body and the back plate are directly connected by bolts, the bumper body does not fall off from the back plate, and the number of parts is small, and the structure is simple and inexpensive.

[Brief explanation of drawings]

Fig. 1 is a partially enlarged plan view showing an embodiment of the bumper for an automobile of this invention, Fig. 2 is a longitudinal sectional view of the bumper shown in Fig. 1 near the center, and Fig. 3 is a diagram of the bumper of the invention. It is a schematic plan view of the whole. 1... Bumper body, 2... Back plate, 2a
...Curved section, 4...Stay.

Claims (1)

[Scope of utility model registration request] In an automobile bumper, the bumper body is made of synthetic resin, and a metal back plate is fixed to the back side of the bumper to provide the necessary rigidity, and the bumper is attached to the car body via a stay attached to the back plate. A pair of upper and lower horizontal ribs are provided on the bumper body that extend parallel to the vehicle width direction, and the back plate has a length that spans almost the entire length of the bumper body in the vehicle width direction, and its cross section has a U-shape that is uniform over the entire length. In addition, a portion slightly inside from both ends of the back plate is greatly recessed and curved directly toward the vehicle body to form a curved portion in the back plate itself, and one location at each end of the back plate excluding the above-mentioned curved portions is formed. , At multiple locations in the center of the back plate between both curved parts, tighten the upper and lower horizontal ribs of the bumper body and the upper and lower horizontal parts of the back plate with bolts inserted in the vertical direction of the vehicle body, and tighten both grooves. An automobile bumper characterized in that the top of the bumper is attached to the vehicle body via a stay.