JP2521444Y2 - Car bumper structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a bumper structure of an automobile.

(Prior Art) Bumpers are provided at the front and rear of the vehicle body to protect the vehicle body from small collisions, but because of their light weight, and because dents are less likely to occur after a collision, a resin material with a relatively high rigidity such as polypropylene. Has developed an impact energy absorbing bumper (see, for example, Japanese Utility Model Laid-Open No. 59-70850). As shown in FIG. 5, an energy absorbing material 12 such as urethane foam is superposed on the outer side of the vehicle body of the back beam 11 having a closed cross-section, the lower end is fixed to the lower surface of the back beam 11 with screws or the like, and the upper end is a bracket. There is a bumper in which an energy absorbing material 12 is covered by a bumper skin 14 attached to the upper surface of the back beam 11 via 13.

(Problems to be solved by the invention) According to the above bumper, there is an advantage that the bumper itself is lightweight and there is little damage in the case of a collision at a low speed, and the bumper itself is restored to its original position. When the bumper skin is buckled or the bracket is deformed due to the deformation of the bumper skin, resulting in deformation of the mounting part of the bumper skin and peripheral parts, it becomes difficult to restore the shape, and the appearance is significantly impaired or the bumper skin mounting hole There is a problem such as damage to the product.

Therefore, the object of the present invention is to reduce the load transmission to the mounting portion of the bumper skin and the peripheral parts even if a load is applied due to a collision, reduce deformation and damage, and improve the shape restoration property after a collision. It is to provide a bumper structure for an automobile.

(Means for Solving the Problems) A bumper structure for an automobile of the present invention that achieves the above object is
In a bumper structure of an automobile in which an energy absorbing material is superposed on the outer side of the back beam of the vehicle and the energy absorbing material is covered with a bumper skin, a back beam having a hat-shaped cross-section opening to the vehicle side and an opening of this back beam. A bracket that is installed between the upper and upper portions of the back beam and projects upward from the upper edge of the back beam, and has a bent portion that bends outward from the upper end of the back beam. It is superposed on the upper surface of the bent portion of the bracket, covers the tip of the bent portion, and hangs downward to form an L-shape outward of the vehicle body at an intermediate height position between the bent portion of the bracket and the upper portion of the back beam. A bumper skin made of an elastically deformable resin material having a space formed by the L-shaped part and the bent part formed on the upper part of the back beam and the bracket, and in a state where the space is held. Back beam are superimposed along the top cross-hat of characterized by comprising an energy absorbing material which is covered state by the bumper skin.

(Operation) A space is formed by the L-shaped part formed on the bumper skin and the bent part formed on the upper part of the back beam and the bracket, and energy is absorbed along the top part of the back beam while the space part is held. Since the members are arranged, elastic deformation of the bumper skin is allowed so that the L-shaped portion of the bumper skin enters the space when the impact acts on the bumper skin due to a collision or the like, and the bumper skin mounting portion is large. By avoiding deformation, deformation and damage of the mounting portion and parts provided around the mounting portion are reduced to improve shape restoration after collision and appearance quality.

(Embodiment) An embodiment of a bumper structure for an automobile of the present invention will be described below with reference to FIGS. 1 to 4.

FIG. 3 is a rear perspective view of an automobile to which the present embodiment is applied. The bumpers 1 are respectively arranged in front of and behind the automobile (only the rear bumper is shown) to reduce damage to the vehicle body at the time of collision of the automobile. It is attached at. Figure 4 shows bumper 1
FIG. 3 is a perspective view showing an end portion of FIG.
FIG. 2 is an enlarged cross-sectional view taken along line A, and FIG. 2 is a perspective view in which the bumper skin 5 and the energy absorbing material 6 for explaining the combined state of the back beam 2 and the bracket 3 in FIG. 1 are omitted. The back beam 2 has a hat-shaped cross section and is arranged at the rear of the vehicle body so that the opening of the back beam 2 is on the vehicle body side. A bracket 3 is installed by screws b between the upper end flange 2a and the lower end flange 2b of the back beam 2.

The upper portion of the bracket 3 is formed with a bent portion 3a which projects upward from the upper edge of the back beam 2 and extends outward from the vehicle body from its upper end.

The lower edge 5a of the bumper skin 5 is fixed to the lower edge 2d of the back beam 2 which is bent inward of the vehicle body by a bolt b, and the upper edge of the bumper skin 5 is attached to the bent portion of the bracket 3 by the mounting portion 5b. The bent portion of the bracket 3 is connected to the upper surface of 3a by a bolt b and covers the tip of the bent portion 3a and hangs downward.
At an intermediate height position between 3a and the upper part 2e of the back beam 2, the L-shaped portion 5c bends the L-shape outward of the vehicle,
The letter-shaped portion 5c, the upper portion 2e of the back beam 2 and the bent portion 3a of the bracket 3 form a space portion 6 having an L-shaped cross section.

A state in which the energy absorbing material 4 such as urethane foam, which extends in the vehicle body width direction, is superposed along the top portion 2c having a hat-shaped cross section of the back beam 2 to avoid the space portion 6, that is, the space portion 6
Is held and is covered by the bumper skin 5.

When the load F due to a collision or the like acts on the bumper 1 of the automobile configured as described above, the energy absorbing material 4 is compressed and deformed to absorb the energy associated with the collision. At this time, the L-shaped portion 5c of the bumper skin 5 has a space 6 formed by the L-shaped portion 5c, the upper portion 2e of the back beam 2 and the bent portion 3a of the bracket 3, and the attachment of the bumper skin 5 is performed. Since the portion 5b and the point of action of the load F are displaced, the portion enters into the space portion 6 and the bumper skin 5 is deformed as shown by the chain line. Therefore, the load acting on the mounting portion 5b of the bumper skin 5 is significantly relieved, the deformation and damage of the mounting portion 5b and the bracket 3 and the like are reduced, and the influence on the peripheral parts can be avoided.

(Effect) As described above, according to the automobile bumper structure of the present invention, a space is formed by the L-shaped portion of the bumper skin, the upper portion of the back beam and the bent portion 3a of the bracket 3 to prevent a collision. Since the L-shaped portion of the bumper skin is elastically deformed and allowed to enter the space, the load acting on the bumper skin mounting portion is reduced, and the bumper skin mounting portion and the mounting portion such as the bracket are deformed. And damage to peripheral parts is reduced,
In addition to cost reductions such as repairs, shape restoration after a collision is improved, appearance quality is improved, and a bracket is installed over the opening of the back beam to improve the rigidity of the back beam and thus the rigidity of the bumper. Can be expected to improve.

[Brief description of drawings]

FIG. 1 is a cross-sectional view for explaining a bumper structure of an automobile of the present invention, FIG. 2 is a perspective view of an essential part showing a combined state of the back beam and a bracket, and FIG. 3 is a rear portion of an automobile to which this embodiment is applied. FIG. 4 is a perspective view showing an end portion of the bumper, and FIG. 5 is a sectional view showing a conventional example. 1 ... Bumper, 2 ... Back beam, 2a ... Top flange, 2b
... bottom flange, 2c ... top, 2e ... top, 3 ... bracket, 3a ... bent part, 4 ... energy absorbing material, 5 ... bumper skin, 5c ... L-shaped part, 6 ... space part.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenichi Sato 1-7-2 Nishishinjuku, Shinjuku-ku, Tokyo Inside Fuji Heavy Industries Co., Ltd. (72) Yasunori Kumagai 1-2-7 Nishishinjuku, Shinjuku-ku, Tokyo Issue: Fuji Heavy Industries Ltd. (56) References: 62-92951 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A back beam (2) having a hat-shaped cross-section opening to the vehicle body side in a vehicle bumper structure in which an energy absorbing material is superposed on the vehicle beam outer side of the back beam and the energy absorbing material is covered with a bumper skin. And a bracket (3) which is provided between the openings of the back beam (2) and has an upper part protruding upward from the upper edge of the back beam and having a bent part (3a) bent from the upper end to the outside of the vehicle body. And the lower edge is coupled to the lower edge of the back beam, and the upper edge is superposedly coupled to the upper surface of the bent portion (3a) of the bracket (3), and the bent portion (3
a) The tip of the bracket (3) hangs downward to hang down (3a) of the bracket (3) and the upper part (2) of the back beam (2).
e) It is bent to the outside of the vehicle body in an L-shape at an intermediate height position and is formed on the L-shaped part (5c), the upper part (2e) of the back beam (2) and the bracket (3). The bumper skin (5) made of an elastically deformable resin material in which the space portion (6) is formed by the curved portion (3a) and the space portion (6) are held, and the back beam (2) has a hat-shaped cross section. A bumper structure for an automobile, comprising: an energy absorbing material (4) which is overlapped along a top portion (2c) of the vehicle and is covered with a bumper skin (5).