JPH043879Y2 - - Google Patents

Description

[Detailed explanation of the idea] Purpose of invention (Industrial application field) The present invention relates to a bumper for an automobile.

(Prior Art) Conventionally, as shown in FIGS. 4 and 5, the open end 2a of the upper wall 2 of the bumper body 1 is supported from below by the open end between the upper wall 2 and the middle wall 3. In part A, a bumper rib 4 is provided over almost the entire length of the bumper body 1 in the longitudinal direction.

The bumper ribs 4 serve to prevent the opening end 2a of the upper wall 2 from sagging due to its own weight or external force, and to maintain good external quality such as appearance and texture of the bumper body 1.

However, as shown in FIG.
is attached to the automobile 5 by fitting the bumper arm 6 of the vehicle body of the automobile 5 into the upper surfaces of the inner wall 3 and the lower wall 7, so the bumper rib 4 is attached to the upper wall 2 and the inner wall 7. 3 is not filled with the open end A, but is filled with the opposite open end B near the front wall 8.

(Problem to be Solved by the Invention) Therefore, in the conventional technology, the upper wall 2 on the bumper arm mounting portion 3x of the middle wall 3 that is attached to the bumper arm 6 is no longer supported by the bumper ribs 4, and the upper wall 2 is partially hanging downward,
The bumper body 1 has a problem in that the finish accuracy as a product is reduced and the appearance as a product is poor.

Furthermore, since the entire length of the bumper body 1 is filled with bumper ribs 4, there is a problem that the bumper ribs 4 become heavy as a whole, making the bumper 9 itself heavy.

Structure of the invention (Means for solving the problem) Therefore, in order to solve the problem, the present invention has a bumper rib that supports the upper wall of the bumper body from below on the inner wall of the bumper body. A plurality of bumper ribs are disposed at intervals in the length direction, and a bumper arm is fitted into a portion of each bumper rib disposed at the bumper arm attachment portion of the inner wall facing the bumper arm attachment portion. A technical measure was taken to create a cutout space for the purpose.

(Function) The bumper arm is fitted onto the inner wall of the bumper body without being interfered with by the bumper ribs, and the bumper ribs arranged on the inner wall of the bumper body move the upper wall of the bumper body above the bumper arm mounting area. Support from below, including the walls. Therefore, the opening end of the upper wall is prevented from hanging down due to its own weight or external force.

In addition, the bumper ribs do not support the upper wall from below over the entire length of the middle wall, but instead support the upper wall at various positions, so the bumper ribs are filled in the entire area. Compared to the conventional case, the bumper ribs become lighter by the amount of space created between each bumper rib.

(First embodiment) The first embodiment embodying the present invention is shown in Figures 1 and 2.
This will be explained according to the diagram.

The bumper 9 of this embodiment is composed of a bumper body 1 and a bumper rib 4. The bumper body 1
is formed of a synthetic resin, for example, polypropylene resin, and is integrally formed with the front wall 8 having a substantially vertical plate shape so that its cross section is approximately Y-shaped or E-shaped. It is formed of an upper wall 2 and a lower wall 7 extending substantially horizontally from the upper and lower parts thereof, respectively, and an intermediate wall 3 extending between these walls in the same manner as described above.

In the opening C formed between the upper wall 2 and the inner wall 3, there are a plurality of plate-shaped bumper ribs 4 made of synthetic resin and having a substantially D-shaped side surface.
They are arranged at intervals in the length direction of the inner wall 3, and support the open end 2a of the upper wall 2 on the inner wall 3 from below. The above-mentioned interval is determined to be substantially constant within a range where the inner wall 3 does not sag.

In the bumper rib 4 disposed on the bumper arm attachment portion 3x where the inner wall 3 is attached to the bumper arm 6, the bumper arm attachment portion 3x
A notch space D having a depth slightly larger than the thickness of the tip portion of the bumper arm 6 is formed in the portion facing the bumper arm 6, and the tip portion of the bumper arm 6 can be fitted into the notch space D.

The depth is such that when the bumper arm 6 is inserted into the notch space D, a slight distance α is formed between the upper surface of the bumper arm 6 and the bumper rib 4.

The bumper 9 is obtained, for example, by forming the bumper rib 4 in the opening C of the bumper body 1 manufactured according to a known method.

When assembling the bumper 9 to the body of the automobile 5, the bumper 9 is held in front of the bumper arm 6 provided on the body side, and the bumper arm 6 is
When the tip of the bumper 9 is inserted into the notch space D, the bumper 9 is set on the bumper arm 6, and the upper surface of the bumper arm 6 comes into contact with the bumper rib 4 within the notch space D.
Next, the bumper 9 may be fixed to the bumper arm 6 by known means.

Next, the functions and effects of the first embodiment configured as described above will be explained.

Since the bumper ribs 4 are arranged at predetermined intervals along the length of the inner wall 3 in the opening C between the upper wall 2 and the inner wall 3, the opening end 2a of the upper wall 2 It is supported from below by bumper ribs 4 in some places. As a result, the opening end 2a of any portion of the bumper body 1 will not sag due to its own weight or external force. Therefore, the finishing accuracy of the bumper body 1 is improved, and as a result, the bumper 9 is improved.
The appearance or appearance of the product is improved and the texture is improved.

Further, a bumper rib 4 disposed on the bumper arm attachment portion 3x of the inner wall 3 with respect to the bumper arm 6
Since a notch space D is provided in the notch space D, when the bumper arm 6 is inserted therein, the notch space D becomes a movement space for the bumper arm 6. Therefore, the bumper arm 6 is fitted into the notch space D without being interfered with by the bumper rib 4.

Furthermore, in the notch space D after the bumper arm 6 is inserted, only a gap α that is slightly larger than the thickness of the bumper arm 6 is left, so when the bumper 9 is assembled to the body of the automobile 5, it is possible to simply By simply fitting the tip of the bumper arm 6 of the vehicle body into the notch space D, the upper surface of the bumper arm 6 comes into contact with the bumper rib 4. Therefore, even if the bumper 9 is not supported by the operator's hands, there is no fear that the bumper 9 will slip off the bumper arm 6, so the efficiency of the bumper assembly work can be improved.

Furthermore, the bumper ribs 4 are arranged on the inner wall 3 at intervals, and are not arranged over the entire length of the inner wall 3, so the bumper ribs 4 are arranged over the entire length of the inner wall 3. Compared to the conventional bumper 9, the bumper 9 of this embodiment is lighter, and therefore the material for the bumper rib 4 can be saved accordingly.

(Second Embodiment) Next, a second embodiment that embodies the present invention in a different manner will be described based on FIG. 3.

In this embodiment, a bumper rib 4 is interposed on the opening end A side of the opening C, which is a space closer to the opening end 3a of the middle wall 3 (or the opening end 2a of the upper wall 2), and the bumper rib 4 is inserted closer to the front wall 8. The bumper rib 4 is formed short so that the bumper rib 4 is not interposed in the opposite opening end B which is the space.

Further, in the bumper rib 4, the lower corner portion 4x on the side of the opening end A has a curved surface having a predetermined curvature R.

The other components are substantially the same as those of the first embodiment.

In this embodiment, in addition to the functions and effects of the first embodiment, the bumper rib 4 is formed short, so the bumper 9 is lighter and can be obtained at a lower cost. Since B is hollow, when the bumper body 1 and bumper ribs 4 are molded at the same time, it is possible to prevent shrinkage that tends to occur in the bumper body 1 due to bumper rib molding, and therefore, the shrinkage of the bumper body 1 can be prevented. The finishing accuracy and the appearance of the bumper 9 are maintained well. Furthermore, since the lower corner portion 4x is curved, it is easy to fit the bumper arm 6 into the notch space D, and as a result, there is an effect that the efficiency of the work of attaching the bumper 9 to the automobile 5 can be increased.

The present invention is not limited to the configurations of the embodiments described above, and can be implemented, for example, in the following manner without departing from the spirit of the invention.

(1) The shape, structure, manufacturing method, etc. of the bumper body 1 can be changed.

(2) The material of the bumper rib 4 etc. can also be changed. For example, the material of the bumper body 1 may be a thermoplastic elastomer or polyurethane resin, and the material of the bumper rib 4 may be polyurethane, polyethylene-vinyl acetate copolymer, or the like.

(3) In the second embodiment, the extent to which the opposite opening end B is made hollow can be increased within a range that does not significantly impair the effects of the present invention.

(4) It is also possible to form the bumper body 1 and the bumper rib 4 in separate processes and then join them together.

(5) The bumper ribs 4 may be joined or integrally formed with the upper wall 2, and may similarly be joined or integrally formed with the inner wall 3.

(6) When the bumper body 1 and bumper rib 4 are integrally molded using a mold, the thickness of the bumper rib 4 closer to the opening end 2a is thinner so that it can be easily released from the mold, and the mounting direction of the bumper rib 4 is fixed. It is better to design the bumper ribs 4 so that they face in this direction.

(7) The thickness of the bumper ribs 4 and the spacing between the bumper ribs 4 can be varied within a range that does not cause the opening end 2a of the upper wall 2 to sag.

Effects of the Invention As detailed above, the present invention can reduce the overall weight of the bumper rib, making the bumper lighter, and also reduce the sagging of the upper wall of the bumper body by reducing the sagging of the upper wall of the bumper arm mounting area. Since it is possible to prevent this from occurring, it has the excellent effect of improving the finishing accuracy of the bumper body and, in turn, improving the appearance of the bumper.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view of the first embodiment, Fig. 2 is a partially cutaway perspective view, Fig. 3 is a cross-sectional view of the second embodiment, and Fig. 4 is a partially cutaway view of the conventional technology assembled in an automobile. A perspective view, FIG. 5 shows − in FIG. 4.
The sectional view in the direction, FIG. 6, is also a sectional view in the - direction. 1...Bumper body, 2...Top wall, 3...Middle wall,
4... Bumper rib, 4x... Lower corner section, 6...
...Bumper arm, D...notch space.

Claims (1)

[Claims for Utility Model Registration] 1. A plurality of bumper ribs that support the upper wall of the bumper body from below are arranged on the inner wall of the bumper body at intervals along the length of the inner wall, and
A bumper for an automobile, wherein a notch space for fitting a bumper arm is formed in a portion of each of the bumper ribs that is disposed at the bumper arm attachment portion of the inner wall and faces the bumper arm attachment portion. 2. The automobile bumper according to claim 1, wherein the bumper rib disposed at the bumper arm mounting portion has a curved lower corner portion on the open end side.