JPS5824602Y2 - Synthetic resin bumper for automobiles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a synthetic resin bumper for automobiles, and particularly to a structure for attaching a long molding to the bumper surface.

Conventionally, automobile bumpers have been press-formed from a copper plate into a roughly C-shaped cross section, and then treated with chrome plating or painting on the surface.However, in recent years, efforts have been made to reduce the weight of car bodies and reduce fuel costs. BACKGROUND OF THE INVENTION Due to a variety of factors such as regulations, laws and regulations, and diverse tastes, automobile bumpers molded from soft or hard synthetic resins have been proposed.

This synthetic resin bumper is lightweight, absorbs shock, easily returns to its original shape even when deformed, and can be mass-produced and made into a variety of shapes using the injection molding method. It has the disadvantage of poor decoration.

Therefore, a method has recently been proposed in which a long molding such as a stainless copper plate or synthetic resin is bonded to the surface of the bumper body after injection molding. Since it is used under harsh conditions, the adhesive strength of the adhesive that adheres the molding decreases, and the molding has the disadvantage that it peels off, especially from the terminal side.

In addition, attempts have been made to provide a groove with a wide bottom on the surface of a synthetic resin molding and fit the molding into the groove.
It is difficult to form the above-mentioned grooves because the bumper molding mold is complicated, and there are disadvantages that it is difficult to realize, is warped, and requires a large amount of man-hours to fit the molding into the grooves. .

Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks, and will be explained in detail below using examples.

Figures 1 and 2 are a plan view and a cross-sectional view along line AA, showing an embodiment of a synthetic resin bumper for automobiles according to the present invention;
The figures are B-B cross-sectional views with the molding attached. In each figure, 1 is an automobile bumper with a nearly C-shaped cross section, which is formed by injection molding of PP resin, and its both ends 2 sides is curved inward, and the corner portion 3 is rounded.

The surface of this bumper 1 includes a corner part 3 to a flat part 4.
A series of molding storage grooves 5 are provided throughout, and a molding main body 6 having a substantially T-shaped cross section as shown in FIG. 4 is stored in the grooves 5.

In addition, a slit 8 extending toward the back side of the bumper 1 and narrower than the groove 5 is formed in the bottom wall 7 of the molding storage groove 5, and furthermore, a slit 8 is formed in the bottom wall 7 of the molding storage groove 5. A hole 10 having substantially the same cross-sectional shape as the molding body 6 is provided at a position 9 corresponding to the tip.

This hole 10 is inclined with respect to the surface of the bumper 1.

The molding body 6 is machined to have a sharp tip 11, and is made of transparent CAB or P that covers the entire area of the aluminum book 12.
It is made of VO or acrylic resin, and a leg 13 protrudes from the bottom thereof along the extending direction of the main body 6. The molding main body 6 and the leg 13 are continuously formed by, for example, extrusion molding.

In this case, unevenness 14 is provided on the side surface of the leg 13,
The thickness of the leg portion 13 is set to be slightly thicker than the width of the slit 8 or approximately equal to the width.

As shown in FIG. 5, the leg portion 13 is provided with a cutout portion 16 at a portion corresponding to the lip 15 on the inside of the bumper formed perpendicularly to the longitudinal direction of the bumper 1, and has a sharp tip 17. It is said that

In this way, the molding consisting of the molding body 6 and the leg part 13 is fixed by pushing the leg part 13 into the slit 8 and passing both ends of the molding body 6 into the hole 10.
The leg portions 13 and the bumpers 1 at both ends of the molding body 6
The molding body 6 is stored in the storage groove 5 by being held in place.

Particularly in this case, since both ends of the molding body 6 penetrate into the hole 10 in an inclined state with respect to the surface of the bumper 1, both ends cannot be easily pulled out, and the molding is attached tightly to the bumper. The unevenness 14 provided on the surface generates a frictional force between the leg portion 13 and the slit 8, and the leg portion 13 is securely fixed.

In addition, when the end part of the leg part 13 and both ends of the molding body 6 are made sharp points 11.17, these are connected to the slit 8 and the hole 1.
0, and the installation process is extremely simple.

Further, by slightly curving the molding body 6 in the width direction as shown in FIG. 4, both ends thereof can be brought into close contact with the bottom wall 7 of the groove 5.

Furthermore, since the lip 15 engages with the notch 16 of the leg 13, movement of the molding body 6 in the longitudinal direction can be prevented.

Therefore, the molding attached in this manner is observed to have a moderate luster due to the metallic color of the aluminum register 12, and the commercial value of the bumper 1 is significantly increased.

Here, according to the present invention, the slit 8 is not limited to one penetrating the bottom side of the bumper 1, but the slit 8 may be provided with a bottom plate portion 18 as shown in FIG.

In this way, the strength of the bumper can be increased.

Although the description has been made assuming that one leg 13 is provided for the molding main body 6 so that the cross section becomes T-shaped, when the main body 6 becomes wide, two legs may be provided to form an nT-shape. There may be more or less legs.

As shown in FIGS. 8 and 9, the leg portion 13 has a shape that expands at the tip side, and the expanded portion penetrates into the hole 19, which has a different diameter on the front side and the back side of the bumper 1. You may also do so.

It is preferable that the inner wall of the twisted slit 8 also have unevenness corresponding to the unevenness 14 of the leg part 13 in order to securely fix the leg part 13.

Further, the lip 15 may be provided so as to extend in the longitudinal direction of the bumper 1.

As explained above, according to the synthetic resin bumper for automobiles according to the present invention, a recess for accommodating the molding body is provided on the front side of the bumper, and both ends or side walls of the molding body housed in the recess are provided in the corresponding portions. Since holes are provided and both ends or side walls of the molding body are inserted into the holes, the molding body can be fixed easily and reliably with a reduced number of man-hours.

Preferably, the legs are provided on the molding body,
By inserting the legs into the slit-like grooves provided in the bottom wall of the storage groove, the molding body can be fixed more reliably.

Further, according to the present invention, since the bumper and molding have a relatively simple structure, the molds for molding them may be inexpensive, and costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of a synthetic resin bumper for automobiles according to the present invention, Fig. 2 is a sectional view taken along the line A-A, and Fig.
The figure is a sectional view taken along line B-B, FIG. 4 is a perspective view showing an example of the molding, FIG. 5 is a side view of the molding, FIG. It is a figure which shows the other Example of the synthetic resin bumper for automobiles by this invention. 1...Bumper 5...Storage groove, 6...
... Mall body, 7 ... Bottom wall, 8 ...
...Slit, 9...hole, 13...leg, 14...irregularity, 16...notch.

Claims (1)

[Scope of utility model registration request] A recessed portion for storing the elongated molding body is provided on the surface of the synthetic resin bumper, and a leg portion 13 is provided on the molding body, and this leg portion is provided with a slit 8 provided in the bottom wall 7 of the recessed portion.
and the tip of the molding body is made sharp, a hole or hole is provided in the wall portion 9 to which this tip corresponds, which is inclined with respect to the surface of the bumper, and the sharp tip of the molding body is inserted into this hole or hole. A synthetic resin bumper for an automobile, characterized by being designed to be inserted.