JPH0540057U - Vehicle bumper - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to strengthen the rigidity of the resin bumper cover without increasing the weight of the backup beam. In addition, the bumps can reduce the impact during a light collision, and the bumper cover can also be used. It is an object of the present invention to provide a vehicle bumper in which the work of assembling a backup beam to the vehicle is easy. [Structure] When the ribs 2A and 2B which are vertically spaced apart from each other are formed along the longitudinal direction on the back surface of the resin bumper cover 1, the upper and lower ribs of the backup beam 3 arranged between the upper and lower ribs 2A and 2B are also formed. A configuration in which projections 6 having a top surface portion 8 that bulges in the vertical direction from the upper and lower surface portions 4A and 4B of the backup beam so as to contact either one are provided separately in the longitudinal direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle bumper, and more particularly to a vehicle bumper including a resin bumper cover and a backup backup beam provided on the back surface thereof.

[0002]

[Prior Art]

 As shown in FIGS. 4 and 5, a conventional bumper for a vehicle of this type has two ribs 2A, 2B vertically parallel to each other formed on the back surface of a resin bumper cover 1 in the longitudinal direction. Reference numeral 3 denotes a backup beam, which is constructed by joining an outer beam 3A having a U-shaped cross section and an inner beam 3B having a flat plate shape so as to form a closed cross section. The upper and lower ribs 2A, 2B of the bumper cover 1 are joined together. The outer beam 3A is inserted from the front side between them, and the upper and lower ribs 2A and 2B of the bumper cover 1 are brought into contact with the upper and lower surfaces of the outer beam 3A, respectively, and fixed by bolts and nuts 4.

Further, the one shown in FIG. 6 is made of foam resin in the space between the upper even corner portion 1 a of the face 1 and the upper even corner portion 2 a of the beam 2 arranged behind the face 1. The core 3 is arranged (Japanese Utility Model Publication No. 63-45341). Further, in the structure shown in FIG. 7, a resin bumper cover 2 is provided in front of a metal backup beam 1 attached to the vehicle body side, and a cavity formed in a lower bulge 3 of the bumper cover 2. 4, a reinforcing member 5 is arranged along the inner surface of the hollow portion 4 from the lower surface portion 1a of the backup beam 1 (Japanese Utility Model Laid-Open No. 1-59759).

[0004]

[Problems to be solved by the device]

 However, in the conventional example shown in FIG. 4 and FIG. 5, the upper and lower ribs 2A and 2B of the resin bumper cover 1 require a design treatment such as a concave groove to prevent surface sink marks. Therefore, as shown by the alternate long and short dash line in FIG. 5, the distance between the upper and lower ribs 2A and 2B may be extremely large. However, it is not necessary for the bumper to expand the height of the outer beam 3A vertically to match this. However, the advantage of using resin as the material of the bumper cover 1 to reduce the weight is diminished.

Therefore, it is conceivable that the outer beam 3A is enlarged vertically only at the mounting portion of the bumper cover 1 to the vehicle, that is, at both ends, but the upper portion or the lower rib cannot be received at the central portion. As a result, for example, when the lower surface of the backup beam 3 is fixed to the lower rib 2B of the bumper cover 1 as shown in the figure, the upper rib 2A is separated from the upper surface of the back up beam 3 to form a space H. Therefore, it becomes difficult to secure the rigidity against the external force F from the upper surface of the bumper cover 1.

Further, in the conventional example shown in FIG. 6, the core 3 is a shape retaining material for the face 1 and is not a reinforcing member. Further, in the conventional example shown in FIG. 7, the reinforcing member 5 is for preventing the lower bulging portion 3 of the bumper cover 2 from being damaged by the tow rope at the time of towing the vehicle. There is no function to receive the shock of time.

[0007]

[Means for solving problems]

 The present invention has been made to solve the above conventional problems, and an object thereof is to provide a bumper cover having a shock absorbing function and a rigidity ensuring function. The gist of the invention is that ribs vertically spaced apart from each other are formed along the longitudinal direction on the back surface of the resin bumper cover, and at the same time, the back up beam arranged between the upper and lower ribs abuts either one of the upper and lower ribs. A bumper for a vehicle is characterized in that a projection having a top surface portion that bulges in the vertical direction from the top and bottom surface portion of the backup beam is provided separately in the longitudinal direction.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is a plan view of a vehicle bumper according to the present invention, FIG. 2 is a sectional view taken along line III-III of FIG. 1, and FIG. 3 is a perspective view of a main part of a backup beam applied to the bumper.

In FIG. 1, reference numeral 1 denotes a resin bumper cover, on the back surface of which ribs 2 A and 2 B which are vertically spaced apart from each other are formed in the longitudinal direction of the bumper cover 1. Reference numeral 3 is a backup backup beam disposed on the back surface of the resin bumper cover 1, which is joined by an outer beam 4 having a U-shaped cross section and an inner beam 5 having a flat plate shape so as to form a closed cross section. The height of the outer beam 4 is smaller than the distance between the upper and lower ribs 2A and 2B. That is, when the outer beam 4 is inserted between the upper and lower ribs 2A and 2B and the lower surface 4B of the outer beam 4 is brought into contact with the lower rib 2B, the space between the lower surface of the upper rib 2A and the upper surface 4A of the outer beam 4 is increased. The gap D is formed.

Reference numeral 6 denotes a protrusion provided on the front portion of the backup beam 3, that is, on the outer beam 4, and two protrusions are provided so as to be separated from each other in the longitudinal direction. The protrusion 6 is composed of a front surface portion 7, a top surface portion 8 and left and right side wall portions 9. The front end portion of the front surface portion 7 is fixed to the upper surface portion 4A of the backup beam 3 and the lower end of the top surface portion 8 is fixed. And the end portions of the left and right side wall portions 9 are fixed to the front surface portion 4C of the backup beam 3, respectively. Here, the top surface portion 8 of the protrusion 6 bulges upward from the upper surface portion 4A of the backup beam 3, and the height from the lower surface portion 4B of the outer beam 4 to the top surface portion 8 of the protrusion 6 is: The inner dimension between the upper and lower ribs 2A and 2B of the bumper cover 1 is set to be the same. Therefore, when the outer beam 4 of the backup beam 3 is inserted between the upper and lower ribs 2A and 2B of the bumper cover 1, the lower rib 2B, the lower surface portion 4B of the outer beam 4, the upper rib 2A and the top surface portion 8 of the projection 6 are respectively inserted. It abuts, and this abutting portion is fixed by bolts and nuts 10.

Since the impact load acting directly on the bumper cover 1 is received by the protrusion 6, the backup beam 3 is converted into an indirect load to absorb the impact, and the lower surface portion 4 B of the backup beam 3 is also absorbed. By contacting the upper and lower ribs 2A and 2B of the bumper cover 1 with the top surface portion 8 of the protrusion 6, the rigidity of the bumper cover 1 is ensured, and the bumper cover 1 and the backup beam 3 are secured. When assembling, positioning of both is easy and workability is improved. Although the projection 6 is provided on the upper surface 4A side of the outer beam 4 in the above embodiment, the same effect can be obtained by arranging the projection 6 on the lower surface 4B side of the outer beam 4.

[0012]

[Effect of the device]

 In the vehicle bumper according to the present invention, as described above, when the ribs which are vertically spaced apart from each other are formed along the longitudinal direction on the back surface of the resin bumper cover, the backup beam arranged between the upper and lower ribs is formed. Since the projections having the top surface part that bulges vertically from the upper and lower surface parts of the back up beam so as to come into contact with either one of the upper and lower ribs are provided separately in the longitudinal direction, without increasing the weight of the backup beam. The rigidity of the resin bumper cover can be strengthened, and at the same time the impact of the bumps can be mitigated in the event of a light collision, and the positioning of the backup beam on the bumper cover can be facilitated and workability can be improved. There are various effects such as improvement.

[Brief description of drawings]

FIG. 1 is a plan view of a vehicle bumper according to the present invention.

FIG. 2 is a sectional view taken along line III-III in FIG.

FIG. 3 is a perspective view of a main part of a backup beam.

FIG. 4 is a plan view with a part of a conventional vehicle bumper removed.

5 is a sectional view taken along line II-II in FIG.

FIG. 6 is a vertical cross-sectional view of another conventional vehicle bumper.

FIG. 7 is a vertical sectional view of still another conventional vehicle bumper.

[Explanation of symbols]

 1 Bumper Cover 2A Upper Rib 2B Lower Rib 3 Backup Beam 4 Outer Beam 4A Upper Surface 4B Lower Surface 5 Inner Beam 6 Projection 8 Top Surface 9 Sidewall

Claims (1)

[Scope of utility model registration request] 1. When a rib vertically spaced apart from each other is formed along a longitudinal direction on a back surface of a resin bumper cover, the backup beam disposed between the upper and lower ribs is brought into contact with either one of the upper and lower ribs. A bumper for a vehicle, characterized in that projections having a top surface portion that bulges vertically from the upper and lower surface portions of the backup beam are provided separately in the longitudinal direction.