JPH111149A - Bumper for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an impact absorbing characteristic at the time of a light collision and make an impact absorbing member light in weight by forming dividing surfaces perpendicular to a pressure receiving direction by stepwise cutting the impact absorbing member at the longitudinal direction center part and fixing divided bodies each other by interposing a plate member provided with ribs which are roughly along the longitudinal direction into the dividing surfaces of the impact absorbing member. SOLUTION: An impact absorbing member 3 divides the longitudinal direction center part into two divided bodies 3a, 3b by stepwise cutting the center part and forms dividing surfaces 4 perpendicular to a pressure receiving direction. A plurality of grooves 5 extending in the longitudinal direction are formed in each of these divided surfaces 4. In a plate member 6, a plurality of ribs 7 are formed on both the surfaces roughly along the longitudinal direction and the divided bodies 3a, 3b each other are adhered and fixed by engaging the ribs 7 to a groove 5 of each of the divided bodies 3a, 3b. Because the plate member 6 which is thinner than that of an overrider is used in this structure, thickness of the impact absorbing member can be increased by the thickness difference, an impact absorbing characteristic can be improved and the impact absorbing member can be made light in weight by the weight difference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle bumper.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a bumper for an automobile is generally used in which a shock absorbing material c is disposed between an amateur a and a fascia b. Further, in order to prevent the amateur a from being broken at the time of a pole collision, an overrider d made of a steel plate is provided at a central portion of the front surface thereof. In general, the shock absorbing material c is divided into left and right parts in consideration of molding convenience, and is used by adhering and fixing them.

[0003]

However, in such a bumper, the thickness of the shock absorbing material c is reduced by the thickness of the overrider d, and the crushing margin is reduced. As a result, the thickness of the shock absorbing material c must be ensured, which limits the degree of freedom in molding.

Further, in order to obtain a sufficient reinforcing effect, the thickness of the overrider d must be increased, and there is a disadvantage that the weight increases.

In view of such circumstances, the present invention can improve the shock absorbing characteristics and reduce the weight at the time of a light collision without impairing the strength at the time of a pole collision and without restricting the degree of freedom in molding. It is an object to provide a vehicle bumper.

[0006]

According to the present invention, there is provided a vehicle bumper having an impact absorbing member disposed between an amateur and a fascia. A step member is formed in a stepwise manner to form a dividing surface perpendicular to the pressure receiving direction, and a plate member having ribs substantially along the longitudinal direction is interposed in the dividing surface of the shock absorbing material, thereby forming a shock absorbing material. Are characterized in that the divided bodies are fixed to each other.

According to this structure, the impact load locally applied to the bumper at the time of the collision with the pole is dispersed over the entire length of the plate member in the longitudinal direction of the armature, so that the bumper armature at the time of the collision with the pole is damaged. Breakage can be prevented. Further, since the plate member is reinforced by ribs extending substantially in the longitudinal direction, it is possible to reduce the weight while securing strength as compared with a conventional overlayer.

[0008] The ribs may be provided on both sides of the plate member.

According to this structure, the ribs of the plate member bite into the divided surface of the shock absorbing material to unite the divided bodies, so that the sub-assembly of the shock absorbing material and the plate can be interposed at the same time, and workability is improved. Get better.

[0010] Further, the height of the rib may be smaller than the thickness of the shock absorber at the time of maximum collapse.

[0011] According to this configuration, even without considering the thickness of the plate member, a sufficient amount of crushing of the shock absorbing material can be ensured, and the effective use of the shock absorbing material can be achieved. I do not receive.

[0012]

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

FIG. 1 is an exploded view of the bumper of the present invention. In the figure, reference numeral 1 denotes an armature, which is provided with stays 2 for mounting the vehicle body at both ends. Reference numeral 3 denotes a shock absorbing material formed of a foam material, which is formed by cutting a central portion in the longitudinal direction in a stepwise manner and dividing it into two divided bodies 3a and 3b, thereby forming a divided surface 4 perpendicular to the pressure receiving direction. is there. A plurality of grooves 5 extending in the longitudinal direction are formed in each of the divided surfaces 4. Reference numeral 6 denotes a plate member, on each of which a plurality of ribs 7 are formed substantially along the longitudinal direction. Then, the ribs 7 of the plate member 6 are engaged with the grooves 5 of the divided bodies 3a, 3b, respectively, and the divided bodies 3a, 3b are bonded and fixed to each other. (See FIG. 2). FIG. 3 shows a case where the bumper receives an impact load. The height h of the rib 7 is smaller than the thickness E of the impact absorber 3 when the impact absorber 3 is crushed at the maximum.

In the case of such a bumper, the breakage of the armature 1 is most likely to occur when a local load such as a pole collision is applied to the central portion of the armature 1. Therefore, the plate member 6 is disposed in the longitudinal direction of the armature 1. It will be located in the center. When a light collision load due to a pole collision is applied near both ends in the longitudinal direction, the load is efficiently transmitted to the stays 2 and 2, so that the armature 1 does not break.

According to the structure of this embodiment, the thickness D of the shock absorber 3 is increased by the thickness difference because the plate member 6 is thinner than the overrider.
The impact absorption characteristics at the time of a light collision can be improved, and the weight can be reduced by the weight difference.

On the other hand, at the time of a pole collision, the impact load applied locally to the bumper is dispersed over the entire length of the plate 6 in the longitudinal direction of the armature 1, so that the breakage of the bumper armature at the time of the pole collision is prevented. Can be prevented. Further, since the plate member 6 is reinforced by the ribs 7 extending substantially in the longitudinal direction, the weight can be reduced while securing the strength as compared with the conventional overlayer. Since the plate member 6 is reinforced by the ribs 7 substantially along the longitudinal direction of the armature 1, there is no possibility that the plate member 6 will be damaged by an impact load.

Further, the ribs 7 of the plate member 6 are engaged with the grooves 5 of the dividing surface 4 of the shock absorbing member 3 so that the divided members 3a, 3b
Since they are integrated with each other, the sub-assembly of the shock absorbing material 3 and the interposition of the plate member 6 can be performed at the same time, and workability is improved. In addition, since the plate member 6 is interposed using the divided portion of the shock absorbing material 3, there is almost no increase in the number of assembling steps of the shock absorbing material 3.

Further, since the height h of the rib 7 is smaller than the thickness E of the shock absorber 3 when the shock absorber 3 is maximally crushed, it is possible to crush the shock absorber 3 without considering the thickness of the plate member 6. A sufficient margin can be ensured, the effective use of the shock absorbing material 3 can be achieved, and the degree of freedom in shaping is not restricted.

[0019]

According to the present invention, since the thin plate member is used as compared with the overrider, the thickness of the shock absorbing material is increased by the thickness difference, and the shock absorbing characteristic at the time of a light collision is obtained. And the weight can be reduced by the weight difference.

Further, since the impact load locally applied to the bumper at the time of the collision with the pole is distributed over the entire length of the plate in the longitudinal direction of the armature, the breakage of the bumper at the time of the collision with the pole can be prevented. Can be. Further, since the plate member is reinforced by ribs extending substantially in the longitudinal direction, it is possible to reduce the weight while securing strength as compared with a conventional overlayer.

Further, since the plate member is interposed using the divided portion of the shock absorbing material, there is almost no increase in the number of assembling steps of the shock absorbing material.

Further, according to the second aspect of the present invention, the ribs of the plate member bite into the divided surface of the shock absorbing material to unite the divided bodies, so that the subassembly of the shock absorbing material and the plate are interposed. It can be done at the same time and workability is improved.

Further, according to the third aspect of the present invention,
Even if the thickness of the plate member is not taken into consideration, the crushing allowance of the shock absorbing material can be sufficiently ensured, the effective use of the shock absorbing material can be achieved, and the degree of freedom in shaping is not excessively restricted.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a vehicle bumper according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing an impact operation state of FIG. 2;

FIG. 4 is a diagram showing a conventional example corresponding to FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Amateur 3 ... Shock absorber 3a ... Divided body 3b ... Divided body 4 ... Dividing surface 6 ... Plate member 7 ... Rib 8 ... Facia

Claims (3)

[Claims] 1. A bumper for a vehicle in which a shock absorbing material is disposed between an amateur and a fascia, wherein the shock absorbing material is cut stepwise at a central portion in a longitudinal direction to divide the shock absorbing material in a direction perpendicular to a pressure receiving direction. A bumper for a vehicle, wherein a plate member having a surface and having ribs extending substantially in the longitudinal direction is interposed on the divided surface of the shock absorbing material to fix the divided bodies of the shock absorbing material to each other. . 2. The vehicle bumper according to claim 1, wherein said ribs are provided on both sides of a plate member. 3. The bumper for a vehicle according to claim 1, wherein a height of the rib is smaller than a thickness of the shock absorbing member when the shock absorber is maximally crushed.