JPH0356129Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a bumper in-horn structure that supports a bumper main body and a bumper cover in a bumper attached to the front and rear of a vehicle body, such as an automobile.

[Conventional technology]

Conventionally, bumpers that are installed on the front and rear of automobile bodies are made of a resin material such as urethane foam, and a bumper cover made of a resin material such as urethane elastomer, in order to improve shock absorption and reduce weight. So-called elastic bumpers made of resin that surround (cover) (exterior materials) are often used, and bumper reinforcements are used as pack-up beam materials to support such bumpers (bumper main body and bumper cover). Most of these bumper reinforcements were made of steel (iron, etc.), but in recent years, in order to further reduce weight, the bumper reinforcements have often been made of FRP resin molded products. It's summery.

Specifically, as shown in FIG. 6, the bumper cover 2 (upper and lower flanges 21, 21 on the open cross-section side) that covers the bumper main body 1 is fixed to the bumper reinforcement 30 with fastening members 7 such as bolts and nuts. The bumper reinforcement 30 is attached to the bumper main body 1 as described above.
In order to support the bumper cover 2 that covers the bumper main body 1, two members 40, 50 having substantially hat cross sections are butted against each other, and the end flanges 410, 510 are abutted and fixed to form a rectangular (square) closed cross section. ing. In addition, this bumper reinforcement 30 (each end flange 410, 510) is made of FRP as mentioned above.
Since it is a resin molded product, the bumper reinforcement 30
Each end flange 410, 5 of the two members 40, 50
10 is fixed by bonding using adhesive 6 rather than by welding or the like.

In addition, 2 forming the bumper reinforcement 30
Each end flange 410, 510 of members 40, 50
As shown in FIGS. 4 and 5, it is formed in the shape of a flat plate (planar shape) with a substantially straight line or a slight curvature toward the vehicle width direction (longitudinal direction),
Each end flange 410, 5 formed in this way
Adhesive 6 is interposed between 10 to bond and fix (adhesion)
and each of these end flanges 41
0,510 (i.e., the upper and lower forming parts of each end flange 410, 510) are the same parts in the longitudinal direction of the vehicle (in the bumper reinforcement 30) due to product design constraints, etc. It is difficult to provide (form) in the vicinity of the central region in the longitudinal direction of the vehicle, and as shown in FIG. 6, it is provided (formed) in a region shifted in the longitudinal direction of the vehicle.

As a conventional technique showing a bumper reinforcement structure that supports a bumper main body and a bumper cover in this manner, there is, for example, Japanese Utility Model Application No. 55-48516 (Utility Model Application No. 53-131679).

[Problem that the invention attempts to solve]

However, in the case of the bumper reinforcement structure shown in FIGS. 4 to 6, two of the bumper reinforcements 30
Each end flange 410, 510 of members 40, 50
are formed into a flat plate shape (plane shape) having a substantially straight line or a slight curvature in the vehicle width direction (longitudinal direction) and are abutted and fixed, and each of the upper and lower end flanges 410, 510 is fixed (adhesive). ) parts (the upper and lower forming parts of each end flange 410, 510) are shifted in the longitudinal direction of the vehicle, so that when each end flange 410, 510 receives a load (external force, etc.) and bends, Since this bending may cause a difference in curvature, shearing in the vehicle width direction (longitudinal direction) is caused at the fixed (adhesive) portion of each end flange 410, 510 (adhesive surface where the adhesive 6 is interposed). Due to the application of force, the fixed (adhesive) portions of the end flanges 410, 510 may peel off.

Therefore, the purpose of this invention is to reduce the shearing force applied (acting) to the adhesion site (adhesion surface) of each end flange of the two members forming the bumper reinforcement, and to expand the adhesion (adhesion) area. The goal is to increase the strength of the adhesive (adhesion) and prevent the adhesive from peeling off.

[Means for solving problems]

Therefore, this invention attempts to solve the above-mentioned problems by forming the end flanges of the two members forming the bumper reinforcement not in a straight line but in a wavy shape and abutting and fixing them.

More specifically, this bumper reinforcement 3 supports a bumper main body 1 and a bumper cover 2 covering the bumper main body 1, and is described with reference numerals in FIGS. 1 and 3. The hose 3 has a bumper reinforcement structure in which the end flanges 41 and 51 of two members 4 and 5 having substantially hat cross sections are abutted and fixed to form a closed rectangular cross section.
two members 4 forming the bumper reinforcement 3;
Each of the end flanges 41, 51 of 5 is formed in a wavy shape, and each of the wavy end flanges 41, 5
1 is butted and fixed.

[Effect]

According to the above-mentioned means, the end flanges 41 and 51 of the two members 4 and 5 that are abutted to form the bumper reinforcement 3 are formed not in a straight line but in a wavy shape and are abutted with the adhesive 6. By fixing (adhering), each of the end flanges 41, 51 (fixed parts)
receives a load, and these end flanges 41, 51
Even if a shearing force is applied to the fixed (adhesive) site (adhesive surface) of the end flanges 41 and 51, this shearing force can be received by the corrugated portions (wavy surfaces) of the end flanges 41 and 51, and the wavy Each end flange 4
It is possible to significantly reduce (weaken) the shearing force applied to the adhesive interface (adhesion site) between the end flanges 41 and 51, and the end flanges 41 and 51 are formed in a wavy shape. Since the adhesion (adhesion) area of the end flanges 41, 51 can be increased, the adhesion (adhesion) strength of each end flange 41, 51 by the adhesive 6 can be increased, and each end flange 4
Peeling of the fixed portions 1 and 51 can be reliably prevented.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

The drawings from FIG. 1 to FIG. 3 show an embodiment of this invention, and as shown in FIG. A bumper cover 2 made of a resin material such as the like is supported by a bumper reinforcement 3 made of an FRP resin molded product. is the bolt
The bumper reinforcement 3 is connected to the bumper reinforcement 3 by a fastening member 7 such as a nut, and the bumper reinforcement 3 is connected to each end flange 41, 51 of the two members 4, 5 having a substantially cross-section of a hat through an adhesive 6. It is formed into a rectangular (quadrangular) closed cross section by abutting and fixing (adhering).

In the bumper reinforcement structure configured as described above, each end flange 41 extending in the vehicle width direction of the two members 4 and 5 forming the bumper reinforcement 3 as shown in FIGS. 1 and 2. ,51
is not straight (a flat plate), but wavy (so-called uneven) in the vehicle width direction (longitudinal direction).
(continuous formation of wavy shapes), and the adhesive 6 is interposed between the wavy end flanges 41 and 51 to abut and fix (adhere) them.

As shown in FIG. 3, each end flange 41, 51 of the two members 4, 5 of the bumper reinforcement 3
Even if the upper and lower fixing (adhesion) parts (the upper and lower forming parts of the end flanges 41 and 51) are shifted in the vehicle width direction,
As shown in the figure, each fixation (adhesion) site 2
The end flanges 41, 51 of the members 4, 5 are formed in a wavy shape (so-called uneven shape) and are abutted (adhered) through the adhesive 6, so that, for example, the end flanges 41, 51 are When bending occurs due to a load (external force, etc.), shearing force in the vehicle width direction (longitudinal direction) is applied to the fixed (adhesive) portions (adhesive surfaces where the adhesive 6 is interposed) of each end flange 41, 51. Even if a It is possible to significantly reduce (weaken) the shearing force applied to the interface (that is, the fixed site where the adhesive 6 is interposed).

Furthermore, since the end flanges 41 and 51 to be abutted and fixed (bonded) are formed not in a simple linear shape but in a wavy shape (uneven shape), the fixed (bonded) area of each of the end flanges 41 and 51 is In other words, the adhesion (adhesion) area can be increased by the wavy portion (wavy surface) due to the wavy shape.

Therefore, these (the ability to significantly reduce the shearing force applied to the bonded area and the ability to expand the bonding (bonding) area) greatly increase the bonding (bonding) strength of each end flange 41, 51 by the adhesive 6. Therefore, even if the end flanges 41, 51 receive a load and bend and shear force is applied, the end flanges 41, 5
There is no possibility that the portion fixed (bonded) by the adhesive 6 of No. 1 will peel off.

Note that the shape (wavy shape) of each end flange 41, 51 of the two members 4, 5 formed in a wavy shape (uneven shape) is not limited to the shape shown in FIG. 1 and FIG. It may have any shape as long as it is (uneven).

[Effect of idea]

As mentioned above, this device forms each end flange of the two members forming the bumper reinforcement into a wavy shape, and these wavy end flanges are abutted and fixed (adhered). Even if each end flange is bent under load and shearing force is applied to its fixed area (adhesive surface), this shearing force can be significantly reduced (weakened).
Since the adhesion (adhesion) area of each end flange can be greatly expanded, the adhesion (adhesion) strength of each end flange with adhesive etc. can be greatly increased, and even when shearing force is applied, Even if this occurs, it is possible to reliably prevent the fixed (adhesive) portions of each end flange from peeling off.

[Brief explanation of drawings]

The drawings from Fig. 1 to Fig. 3 show an embodiment of this invention; Fig. 1 is a perspective view of Fig. 2;
The figure is a plan view of the bumper reinforcement alone in Figure 3, Figure 3 is a vertical cross-sectional view of the entire bumper, and Figure 4 is a longitudinal sectional view of the entire bumper.
The drawings from Figure to Figure 6 show conventional examples.
4 is a perspective view corresponding to FIG. 1, FIG. 5 is a plan view corresponding to FIG. 2, and FIG. 6 is a sectional view corresponding to FIG. 3. 3... Bumper reinforcement, 4, 5... Member having a substantially hat cross section, 41, 51... End flange.

Claims (1)

[Scope of utility model registration request] A bumper reinforcement that supports a bumper main body and a bumper cover that covers the bumper main body, and the bumper reinforcement is formed into a rectangular closed cross section by abutting and fixing flanges at each end of two members having a substantially hat cross section. In the bumper reinforcement structure,
A bumper reinforcement structure characterized in that each end flange of the two members forming the bumper reinforcement is formed into a wavy shape, and these wavy end flanges are abutted and fixed.