JPH04107148U - Automobile bumper beam structure - Google Patents

Abstract

(57) [Summary] (with modifications) [Purpose] To improve workability when attaching a bumper fascia to a bumper beam, and to improve the strength of the bumper itself together with reinforcing ribs installed vertically on the bumper beam. to try to improve. [Configuration] Engagement rib 5 on the upper edge of the bumper fascia 2
A guide rib 11 having a slope connecting the lower end of the engagement portion 8 of the bumper beam 7 and the tip of the bumper beam 7 into which the guide rib 11 is inserted
are appropriately arranged on the upper rib 10 of the bumper beam 7, and by pressing the upper edge 3 of the bumper fascia 2 along the guide rib 11 during installation work, the engaging rib 5 can be easily moved. The guide ribs 11 can be inserted into the engaging portions 8, and even if an impact load is input to the bumper 1, the guide ribs 11 can prevent deformation of the bumper fascia 2, which affects the strength of the bumper 1 itself.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is particularly useful for bumpers placed at the front of a vehicle. The present invention relates to an improvement in the structure of a bumper beam that holds a constituent bumper fascia.

0002

[Conventional technology]

Traditionally, bumpers placed at the front of vehicles are integrally molded from resin. The bumper beam that holds the bumper fascia is attached to the top edge of the bumper fascia and A bumper with engaging ribs on the lower edge and a horizontal horizontal rib approximately in the center. The fascia includes engagement ribs provided on the upper and lower edges of the bumper fascia, Insert into the upper and lower engaging parts of the bumper beam, and then fit into the bumper fascia. A horizontal horizontal rib placed approximately in the center is placed on a receiving rib at a position corresponding to this horizontal horizontal rib. When fitted, it becomes an integral part of the bumper.

0003

[Problem that the idea aims to solve]

However, in the above conventional one, the bumper fascia is The mainstream of par beams is that the top of the bumper has a strong slope due to the design of the bumper. Therefore, when molded in one piece by injection molding, a cavity is created on the upper rib. This results in a vertical wall surface being formed at the rear end of the upper rib.

0004 Therefore, when trying to attach the bumper fascia to the bumper beam, , the engagement ribs provided on the upper and lower edges of the bumper fascia, especially the upper edge. Due to the low rigidity of the bumper fascia itself and defects in molding, In many cases, the engagement rib on the upper edge hangs downward. When trying to insert it into the engagement part of the bumper beam, the upper edge of the bumper fascia The engaging rib of the bumper beam comes into contact with the wall formed at the rear end of the upper rib of the bumper beam. As a result, the bumper assembly work is significantly hindered, and the bumper flap has low rigidity. There is a disadvantage that the upper edge of the rays is deformed.

[0005] On the other hand, the bumper beam has a structure that allows the bumper to withstand loads such as impacts. The bumper beam has horizontal horizontal ribs and receiving ribs located approximately in the center of the bumper fascia. This load is transmitted to the bumper through the connection with the bumper. -The upper and lower edges of the fascia are deformed in a direction that narrows the opening cross section. Therefore, if the top of the upper rib is hollow, the cross-sectional area of the opening for load input will be narrowed, and the cross-sectional area will be reduced. There is a drawback that the strength of the bumper itself decreases as the coefficient decreases.

[0006] Therefore, when installing the bumper fascia, it is necessary to The flexible ribs molded on the back of the bumper fascia are brought into contact with the bumper fascia. At the same time, the bumper fascia can be attached to the rain hole using a similarly flexible clip. A device that is attached to a base panel (Utility Model Application Publication No. 157459/1983) was proposed. However, the rain hose panel that holds the bumper fascia is cross-sectional in the opening direction. , when the bumper receives an impact load, it tends to open and deform, so the impact absorption is low. This makes it easier for impact loads to be transmitted directly to the vehicle body.

[0007] In addition, the deflection of ribs, etc. that absorb impact loads must be made of resin. Therefore, it is more likely to buckle than to be reversible against impact loads, making it difficult to restore. Therefore, it cannot withstand the impact load input many times, and the rib seat If you try to prevent bending, you will have to make the ribs thicker, and the bumper will need to be thicker during molding. There is a drawback that sink marks and the like occur on the surface of the fascia, impairing its appearance.

[0008] Therefore, this invention is intended to improve the drawbacks of the above-mentioned conventional methods, and In addition to improving the ease of assembling the parfacial, it also improves the strength of the bumper itself. It is intended to raise the level.

[0009]

[Means to solve the problem]

For this purpose, the bumper bead that fits into the engagement rib on the upper edge of the bumper fascia. a slope portion formed to connect the lower end of the engagement member of the beam and the tip of the upper rib of the beam; A triangular guide rib having a triangular shape is placed on the upper rib, and the rear end of this upper rib and the lower end of the engaging part It is arranged along the wall between the two.

0010

[Effect]

Since it has the above configuration, when attaching the bumper fascia to the bumper beam, , the upper edge of the bumper fascia droops downward due to low rigidity or defective molding. Even if the upper edge of the bumper fascia is Triangles are placed as appropriate along the wall between the rear end of this upper rib and the lower end of the engagement. By pressing along the slope of the shaped guide rib, the top of the bumper fascia is The edge is guided along this slope to the engagement part of the bumper beam, and the upper edge is easily The engaging rib can be inserted and fitted.

[0011] Furthermore, there is no impact on the bumper consisting of the bumper beam and bumper fascia. Even if an impact load is applied, the Since the guide ribs are in contact with each other, the impact load causes the bumper beam to Even when the bumper fascia is bent, the section modulus does not change due to the opening deformation of the bumper fascia. The strength of the damper itself can be improved.

0012

【Example】

This invention will be further explained with reference to embodiments shown in the drawings. (1) is an example of implementation of this idea This bumper (1) is a bumper that is integrally molded from resin. A bumper fascia that holds a perfacia (2) and a bumper fascia (2). (7).

[0013] This bumper fascia (2) engages with its upper edge (3) and lower edge (4). In addition to providing a rib (5), a horizontal horizontal portion is provided approximately at the center of the back surface of the bumper fascia (2). The bumper beam (7) is formed by protruding ribs (6), while the bumper beam (7) is An engaging portion (8) is provided at the lower part of the bumper beam (7), and an approximately central portion of the bumper beam (7) A receiving rib (9) is protruded from the bumper fascia (9). 2) is a bumper bead with engaging ribs (5) provided on the upper edge (3) and lower edge (4). Insert the horizontal rib (6) into the engaging part (8) of the bumper beam (7), and It is engaged and fixed by being inserted into the receiving rib (9).

[0014] Then, insert the engagement rib (5) on the upper edge (3) of the bumper fascia (2). The lower end of the engaging part (8) of the bumper beam (7) and the upper rib ( 10) A triangular guide having an inclined surface (12) formed to connect the tips of The rib (11) is placed on the upper rib (10), and the rear end of the upper rib (10) and the engaging portion (8) It is appropriately arranged along the wall surface (15) between the lower end of the.

[0015] In addition, in the bumper beam (7), between the upper rib (10) and the receiving rib (9) , reinforcing ribs are placed at appropriate intervals between the lower rib (13) and the receiving rib (9). (14) is installed vertically, and this reinforcing rib (14) is attached to the bumper bit. The purpose of this is to improve the strength of the frame (7).

[0016] Since this invention has the above configuration, the bumper fascia (2) is When trying to attach it to the frame (7), use the bumper fascia made of integrally molded resin. The upper edge (3) of the isher (2) hangs downward due to low rigidity or defective molding. Even if the upper edge (3) of the bumper fascia (2) is Attach the rear end of the upper rib (10) and the bumper fascia to the surface of the upper rib (10) of the arm (7). The wall surface (1) between the lower end of the engaging portion (8) into which the engaging rib (5) of the isher (2) is inserted 5) on the sloped part (12) of the triangular guide rib (11) arranged as appropriate. For example, by pressing the bumper fascia downward, The upper edge (3) of the isher (2) is placed along the slope (12) of the guide rib (11). Since it will be guided to the engagement part (8) of the bumper beam (7), it will be easy to Connect the engagement rib (5) of the upper edge (3) of the bumper fascia (2) to the bumper beam. (7) into the engaging portion (8) of the bumper beam ( 7) can be fixed.

[0017] Furthermore, a bumper consisting of this bumper beam (7) and bumper fascia (2) - Regarding (1), even if the impact load generated by a collision is input, the bumper face will not be affected. A guide placed on the upper rib (10) of the bumper beam (7) is placed on the back side of the chassis (2). Since the drib (11) is in contact, the space between the upper rib (10) and the receiving rib (9) , vertically arranged between the lower rib (13) and the receiving rib (9) at appropriate intervals. Together with the reinforcing ribs (14), the bumper beam (7) changes due to the impact load. Even if the bumper fascia (2) is bent, the section modulus due to the opening deformation of the bumper fascia (2), etc. The strength of the bumper (1) itself can be significantly improved. can be set.

[0018]

[Effect of the idea]

As shown above, the surface of the upper rib of the bumper beam that holds the bumper fascia By arranging triangular guide ribs with sloped parts on the bumper fascia, In addition to improving workability when installing the bumper beam on the isha, this guide Idlib prevents damage caused by deformation of the bumper beam when an impact load is applied. This eliminates changes in section modulus caused by deformation of the bumper fascia. It has an excellent effect of improving its own strength.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a bumper that is an embodiment of this invention.

FIG. 2 is an enlarged sectional view of a main part of the bumper in an attached state.

FIG. 3 is an enlarged perspective view of essential parts of the bumper beam.

[Explanation of symbols]

1 Bumper 2 Bumper fascia 3 Upper edge 4 Lower edge 5 Engagement rib 6 Horizontal horizontal ribs 7 Bumper beam 8 Engagement part 9 Receiving rib 10 Upper rib 11 Guide rib 12 Slope section 13 Lower rib 14 Reinforcing ribs 15 Wall surface

Claims (1)

[Scope of utility model registration request] 1. A triangular guide rib having a slope portion formed to connect the lower end of a bumper beam into which the engaging rib of the upper edge of the bumper fascia is inserted and the tip of the upper rib of the beam. is arranged on the upper rib along the wall surface between the rear end of the upper rib and the lower end of the engaging part.