JPH0585286A - Bumper for vehicle - Google Patents

Abstract

PURPOSE:To improve strength of a bumper reinforcement secured to a car body by providing a first intermediate wall arranged between a front wall and a rear wall in parallel with the front wall and the rear wall and connecting the upper end to the lower end and a second intermediate wall arranged between an upper wall and a lower wall in parallel with the upper wall and the lower wall and connecting the front end to the rear end. CONSTITUTION:When a load is applied by a collision of a vehicle, the load is absorbed by deformation of a urethane 2 and a bumper reinforcement 1. At this time, as an upper wall 4 and a lower wall 5 of the bumper reinforcement 1 are connected to each other by a first intermediate wall 11, the buckling deformation in the opening direction is restricted and gradually deformed, while as a front wall 6 is connected to a rear wall 7 by a second intermediate wall 12, the buckling deformation in the inner direction is restricted and gradually deformed. By this, the applied load is absorbed by the bumper reinforcement 1.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle bumper device.

[0003]

2. Description of the Related Art Conventionally, as this type of bumper device, the one disclosed in Japanese Utility Model Publication No. 60-6357 is known. It has a bumper reinforcement fixed to the vehicle body and a skin that covers the bumper reinforcement and forms the exterior.The bumper reinforcement is a top wall and a bottom wall parallel to the top wall. A wall, a front wall that connects the upper wall and the lower wall at their front ends and serves as a load receiving surface, and a rear wall that connects the upper wall and the lower wall at their central portions and serves as a fixed surface to the vehicle body, A front wall and a rear wall are provided in parallel with the front wall and the rear wall, and an intermediate wall connecting the upper end and the lower end is provided.

[0004]

However, in the above bumper device, when a load is applied to the front wall such as during a vehicle collision, the upper wall and the lower wall are opened in the opening direction between the front wall and the rear wall. Causes buckling deformation. For this reason, the strength of the bumper reinforcement is weak and the load cannot be sufficiently absorbed.

Therefore, the present invention has an object to improve the strength of bumper reinforcement.

[0006]

[Constitution of the invention]

[0007]

The technical means taken in the present invention to solve the above technical problems include an upper wall,
A lower wall that is parallel to the upper wall, a front wall that connects the upper wall and the lower wall at their front ends and serves as a load receiving surface, and a upper wall that connects the upper wall and the lower wall at their rear ends. A rear wall that serves as a fixed surface to the vehicle body, a first intermediate wall that is disposed between the front wall and the rear wall in parallel with the front wall and the rear wall, and that connects the upper end and the lower end, A bumper reinforcement comprises a second intermediate wall that is disposed between the upper wall and the lower wall in parallel with the upper wall and the lower wall and connects the front end and the rear wall. That is what I did.

[0008]

The above technical means operates as follows. When a load is applied to the front wall, such as during a vehicle collision, the first intermediate wall acts to suppress buckling deformation of the upper wall and the lower wall in the opening direction. Thereby, the strength of the bumper reinforcement can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, the bumper reinforcement 1 is fixed to a vehicle body (not shown) via a bumper stay (not shown). A urethane 2 serving as a cushioning material is disposed in the front part of the bumper reinforcement 1 and the bumper reinforcement 1 and the urethane 2 are covered with a skin 3.

The bumper reinforcement 1 comprises a front wall 6 connecting the upper wall 4, a lower wall 5 parallel to the upper wall 4, an upper wall 4 and a lower wall 5 at their front ends, and an upper wall 4 and a lower wall 5. It has a closed cross-section rectangular shape composed of a rear wall 7 and a rear wall 7 which are connected to each other at the rear end. Is formed in. Front wall 6
Serves as a load receiving surface in the event of a vehicle collision and supports the urethane 2. The bumper stay is fixed to the rear wall as a fixed surface to the vehicle body. Further, the lower and upper ends of the outer skin 3 are fixed and supported by the clip 9 via the pressing plate 8 to the lower wall 5 and the support body 10 fixed to the vehicle body.

In the closed cross section formed by the upper wall 4, the lower wall 5, the front wall 6 and the rear wall 7, the front wall 6 and the rear wall which connect the upper wall 4 and the lower wall 5 in the vicinity of their intermediate portions. 7, a first intermediate wall 11 parallel to the first intermediate wall 11 and a second intermediate wall 12 parallel to the upper wall 4 and the lower wall 5 connecting the front wall 6 and the rear wall 7 in the vicinity of the intermediate portion thereof are provided. The first and second intermediate walls 11 and 12 are integrally formed with the upper wall 4, the lower wall 5, the front wall 6 and the rear wall 7 by extruding an aluminum material or the like.

Next, the operation will be described.

When a load is applied due to a vehicle collision, the load is absorbed by the deformation of the urethane 2 and the bumper reinforcement 1. At this time, since the upper wall 4 and the lower wall 5 of the bumper reinforcement 1 are connected by the first intermediate wall 11, the buckling deformation in the opening direction thereof is suppressed and the front wall 6 gradually deforms. Since is connected to the rear wall 7 by the second intermediate wall 12, the inward buckling deformation is suppressed and gradually deforms. As a result, the applied load is absorbed by the bumper reinforcement 1.

As described above, the bumper reinforcement 1 has the upper wall 4 by the first and second intermediate walls 11 and 12.
Buckling deformation of the lower wall 5 and the front wall 6 is suppressed. As a result, the strength of the bumper reinforcement 1 is improved,
The load at the time of a vehicle collision can be reliably absorbed.
The first and second intermediate walls 11 and 12 are the upper wall 4, the lower wall 5, and
Since it is integrally formed with the front wall 6 and the rear wall 7 by extrusion, it can be advantageous in terms of manufacturing man-hours and cost.

The number and positions of the first and second intermediate walls 11 and 12 may be changed depending on the characteristics of the vehicle in which they are mounted.

[0017]

Industrial Applicability The present invention relates to a vehicle bumper device having a bumper reinforcement fixed to a vehicle body and a skin that covers the bumper reinforcement and forms an exterior, wherein the bumper reinforcement is , The upper wall,
A lower wall that is parallel to the upper wall, a front wall that connects the upper wall and the lower wall at their front ends and serves as a load receiving surface, and a upper wall that connects the upper wall and the lower wall at their rear ends. A rear wall that serves as a fixed surface to the vehicle body, a first intermediate wall that is disposed between the front wall and the rear wall in parallel with the front wall and the rear wall, and that connects the upper end and the lower end, A bumper device for a vehicle, comprising: a second intermediate wall, which is arranged between the upper wall and the lower wall in parallel with the upper wall and the lower wall, and which connects the front end and the rear wall. Therefore, it has the following effects.

The buckling deformation in the opening direction between the upper wall and the lower wall when a load is applied to the front wall such as a vehicle collision can be suppressed by the first intermediate wall. As a result, the strength of the bumper reinforcement is improved and the applied load can be reliably absorbed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vehicle bumper device according to the present invention.

[Explanation of symbols]

 1 Bumper Informent 3 Skin 4 Upper wall 5 Lower wall 6 Front wall 7 Rear wall 11 1st middle wall 12 2nd middle wall

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masahisa Ohashi, 2-chome, Asahi-cho, Kariya city, Aichi prefecture, Aisin Seiki Co., Ltd. Aisin Light Metal Co., Ltd. (72) Inventor Kazushige Azuchi No. 3 No. 12 Noe, Nagure, Shinminato City, Toyama Prefecture Aisin Light Metal Co., Ltd.

Claims (1)

[Claims] 1. A bumper device for a vehicle, comprising: a bumper reinforcement fixed to a vehicle body; and a skin that covers the bumper reinforcement and forms an exterior, wherein the bumper reinforcement is an upper wall. A lower wall parallel to the upper wall, a front wall that connects the upper wall and the lower wall at their front ends and a load receiving surface, and a lower wall that connects the upper wall and the lower wall A rear wall that serves as a fixing surface to the vehicle body, and a first intermediate wall that is disposed between the front wall and the rear wall in parallel with the front wall and the rear wall and that connects the upper end and the lower end. A bumper device for a vehicle having a second intermediate wall that is disposed between the upper wall and the lower wall in parallel with the upper wall and the lower wall and connects the front end and the rear wall.