JPH0450197Y2

JPH0450197Y2 -

Info

Publication number: JPH0450197Y2
Application number: JP1986115530U
Authority: JP
Priority date: 1986-07-28
Filing date: 1986-07-28
Publication date: 1992-11-26
Also published as: JPS6322260U

Description

[Brief explanation of the drawing]

第１図は本考案第１実施例のバンパレインフオ
ース構造を採用したフロントバンパの要部を示す
斜視図、第２図は第１実施例構造のフロントバン
パを示す斜視図、第３図は従来例を示す斜視図で
ある。１……車体、２０……バンパレインフオース、
２１……センタレインフオース、２２……サイド
レインフオース、２１１……前端側縦壁（先端側
縦壁）、２２１……車体側縦壁、Ｆ１……フロン
トバンパ。 Fig. 1 is a perspective view showing the main parts of a front bumper adopting the bumper reinforcement structure of the first embodiment of the present invention, Fig. 2 is a perspective view showing the front bumper of the structure of the first embodiment, and Fig. 3 is FIG. 2 is a perspective view showing a conventional example. 1...Vehicle body, 20...Bumper reinforcement,
21...Center reinforcement, 22...Side reinforcement, 211...Front end side vertical wall (tip side vertical wall), 221...Vehicle side vertical wall, F1...Front bumper.

Claims

[Claims for Utility Model Registration] A bumper reinforcement is provided inside the bumper face, and the bumper reinforcement is connected to a center reinforcement in the center and both ends of the center reinforcement, and a side reinforcement attached to the vehicle body, the center reinforcement extending from a front end vertical wall on the front end side in the outward direction of the vehicle body, and an upper edge and a lower edge of the front end vertical wall. It is provided with an upper horizontal wall and a lower horizontal wall, and is formed in a substantially U-shaped cross section with an opening on the vehicle body side, and both ends in the vehicle width direction are approximately the same as the mounting position of the side rainfors to the vehicle body. The side reinforcement is formed entirely of one steel plate, and furthermore, the side reinforcement is located on the vehicle body side in the longitudinal direction of the vehicle body. A vertical wall on the vehicle body side, an upper horizontal wall and a lower horizontal wall extending from the upper and lower edges of the vertical wall on the vehicle body side, and a flange portion formed by bending vertically from the tip of each horizontal wall toward the exterior of the vehicle. It is formed in a substantially U-shaped cross section with an open end side in the vehicle outward direction in the longitudinal direction of the vehicle body, and is also formed in a shape with both ends open, and the outward end end portion of each horizontal wall and the flange portion are formed in a substantially U-shaped cross section. A bumper reinforcement characterized in that the bending line is formed in a shape having a curved curvature extending from the front side or rear side of the vehicle body to the side side of the vehicle body, and further, the vertical wall on the body side is attached to the vehicle body. Aus structure. *Theory (industrial application field) This invention relates to the structure of bumper reinforcements used in vehicle bumpers. (Prior Art) As a conventional bumper reinforcement structure, the one shown in FIG. 3, for example, is known. In this conventional structure, as shown in Japanese Utility Model Application Publication No. 60-170248 and Japanese Patent Application Publication No. 60-203554, a bumper reinforcement 01 has a front end vertical wall 02 on the front end side in the vehicle exterior direction. It is formed in a cross-sectional shape, and its overall length is approximately equal to the overall width of the vehicle body.The entire body is formed with a constant curvature by roll forming, and both ends are attached to the stay 03 at a position near the center. It was attached to the side member of the vehicle body. (Problem that the invention aims to solve) However, in the case of such conventional bumper reinforcements, since the stays are interposed to attach the bumper reinforcements to the vehicle body, the weight of the vehicle due to the stays is In addition, there is a problem in that the stay requires a lot of effort and cost to manufacture. In addition, since this bumper reinforcement is molded as a long one-piece piece, the shape of the bumper reinforcement has a large curvature such that both ends wrap around the side of the vehicle body (i.e., a small radius of curvature). shape), it can no longer be molded without molding, and a large mold is required, leading to an increase in manufacturing costs. (Means for solving the problem) The present invention was made with the purpose of solving the above-mentioned problems.To achieve this purpose, the present invention includes a bumper reinforcement inside the bumper face. is provided, and the bumper reinforcement is divided into a center reinforcement in the center and side reinforcements connected to both ends of the center reinforcement and attached to the vehicle body, The center reinforcement is provided with a distal end vertical wall on the distal end side in the outward direction of the vehicle in the longitudinal direction of the vehicle body, and an upper horizontal wall and a lower horizontal wall extending from the upper and lower edges of the distal end vertical wall. It is formed into an open approximately U-shaped cross section, and
Both ends in the vehicle width direction are formed to a length that is located at approximately the same position as the installation position of the side reinforcement on the vehicle body or slightly inside the side reinforcement, and the side reinforcement is formed entirely of one piece. The side reinforcement is formed of a steel plate, and further includes a vehicle body side vertical wall on the vehicle body side in the longitudinal direction of the vehicle body, an upper horizontal wall and a lower horizontal wall extending from the upper and lower edges of the vehicle body side vertical wall, respectively. A flange portion is provided that is bent vertically from the outward end of the horizontal wall, and is formed into a substantially U-shaped cross section with the outward end of the horizontal wall open in the longitudinal direction of the vehicle body, and both ends are open. The horizontal wall is formed in such a shape that the bending line between the outward end portion of each horizontal wall and the flange portion is curved around from the front side or the rear side of the vehicle body to the side side of the vehicle body, and further, The vehicle body side vertical wall is attached to the vehicle body. (Function) In the bumper reinforcement structure of the present invention, the bumper reinforcement is attached to the vehicle body in the following steps. First, the center reinforcement and side reinforcement are molded separately. In this case, the side reinforcement is formed by pressing a single steel plate. Next, side reinforcements are connected to both ends of the center reinforcement to form one bumper reinforcement. The bumper reinforcement is then attached to the vehicle body by attaching it to the vehicle body using the vehicle body side vertical walls of the side reinforcements at both ends of the bumper reinforcement. Therefore, in the present invention, the side reinforcements also serve as stays. In addition, the side reinforcement has a flange portion, and the bending line between the flange portion and each horizontal wall is formed in a curved shape.
This flange portion is hard to bend, has extremely high shape retention, and has high rigidity against impact input from an oblique direction. Furthermore, when an impact is applied, the flange portion makes surface contact with the bumper face, making it difficult to cut the bumper face. (Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
In describing this embodiment, a bumper reinforcement provided inside a front bumper for an automobile will be taken as an example. Bumper reinforcement 2 of the first embodiment of the present invention
As shown in FIG. 2, the front bumper F1 having a diameter of 0 is attached to the front part of the vehicle body 1 so as to extend in the vehicle width direction. , a bumper face 10 and a bumper reinforcement 20. The bumper face 10 is a front bumper F.
1, and has a substantially U-shaped cross section. The bumper face 10 has a locking groove 11 formed along the upper rear edge, and the locking groove 11 is locked with a locking flange portion 212 of the bumper reinforcement 20, which will be described later. The lower side is fixed to the bumper reinforcement 20 with screws 12 and attached. The bumper reinforcement 20 is divided into a center reinforcement 21 at the center and side reinforcements 22, 22 at both ends. As shown in FIG. 1, the center reinforcement 21 has a front end vertical wall (a leading end vertical wall) which is an impact input surface at the time of a collision on the front end side of the vehicle body 1 (the leading end side in the outward direction of the vehicle body longitudinal direction). ) 211, and an upper horizontal wall 21 extending from the upper and lower edges of this front end side vertical wall 211.
3 and a lower horizontal wall 214, and is formed by roll forming into a substantially U-shaped cross section with an opening on the vehicle body side, and the length of this center reinforcement 21 is as shown in FIGS. As shown, both ends are the car body 1
It is formed in such a length that it is arranged so as to overlap with the side members 2, 2 provided on both the left and right sides of. Note that a locking flange portion 212 is formed at the rear edge of the upper horizontal wall 213 and is bent so that its tip faces forward. The side reinforcements 22, 22 are
As shown in the figure, the vehicle body side vertical wall 221 on the vehicle body 1 side
An upper horizontal wall 224 and a lower horizontal wall 225 extending from the upper and lower edges of the vehicle body-side vertical wall 221 are provided, forming a substantially U-shaped cross-section with an open front end in the vehicle exterior direction, and are press-molded. It is formed by Further, as shown in FIG. 2, the side reinforcement 22 is formed in a shape with a large curvature so that the left and right ends of the vehicle body wrap around the side surface 4 of the vehicle body 1, and the side reinforcements 22 are formed in a shape with a large curvature so that the left and right ends of the vehicle body wrap around the side surfaces 4 of the vehicle body 1. Similarly, the bending lines with the horizontal walls 224 and 225 are formed in a shape having a curved curvature extending from the front side of the vehicle body to the side side of the vehicle body. In addition, two mounting holes 2 are provided at the end of the vehicle center side of the vehicle body side vertical wall 221 of this side reinforcement 22.
22, 222 are bored, and the front edges of the upper and lower horizontal walls 224, 225 are provided with front flange portions 223, 22 with their tips facing outward and serving as impact input surfaces.
3 is formed. And this side rain force 22, 22
As shown in FIG. 1, front flanges 223, 223 are connected to the front vertical walls 211 at both left and right ends of the center reinforcement 21 by spot welding to form the bumper reinforcement 20. , and by attaching the vehicle body side vertical wall 221 of this side reinforcement 22 to the bolts 3, 3 protruding from the tips of the side members 2 through the mounting holes 222, 222, the bumper reinforcement 20 is attached to the vehicle body 1. It is attached. Next, the operation of the first embodiment will be explained. When forming the bumper reinforcement 20, first, the side reinforcements 22, 22 are formed by press molding, and the center reinforcement 21 is formed by roll molding. Then, the center reinforcement 21 and the side reinforcements 22, 22 are connected by spot welding to form the bumper reinforcement 20. Thereafter, bolts 3 are inserted into mounting holes 222 on the vehicle body side vertical wall 221 of the side reinforcement 22 to fix it, and the side reinforcement 22 is attached to the vehicle body 1. As explained above, in the bumper reinforcement 20 of the first embodiment, the center reinforcement 21 and the side reinforcements 22, 22 are divided and formed separately, so that the side reinforcements 21 and 22 have a large curvature. Since only the reinforcement 22 is press-molded and the center reinforcement 21 is formed by roll-forming, the mold can be small and mold costs can be kept low. Furthermore, since the bumper reinforcement 20 is attached to the vehicle body 1 using the side reinforcement 22 and no stays are used, it is possible to reduce the vehicle weight, manufacturing labor, and cost for this stay. can get. Further, the side reinforcement 22 has a flange portion 223 on the front end side, and the bending line between the flange portion 223 and each horizontal wall 224, 225 wraps around from the front side of the vehicle body to the side side of the vehicle body. Since the flange portion 223 is formed to have a curved curvature, it is difficult to bend and has extremely high shape retention, and provides high rigidity against impact input from an oblique direction. Moreover, when an impact is input, the flange portion 223
Since it hits the surface, the bumper face is 10.
difficult to cut. Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the present invention may be modified without departing from the gist of the present invention. included. For example, in the embodiments, the method for forming the center reinforcement and side reinforcements may be freely adopted depending on the shape and is not limited to the embodiments. Further, in the embodiment, the bumper is used as a front bumper at the front end of the vehicle body, but it may also be used as a rear bumper at the rear end of the vehicle body. (Effects of the invention) As explained above, in the bumper reinforcement structure of the invention, since the side reinforcements also serve as stays, the weight of the vehicle for the stays, the labor and cost of manufacturing the stays, and the cost This has the effect of reducing the amount of In addition, because the center reinforcement and side reinforcement are formed separately, if both ends of the bumper reinforcement have a shape that requires a mold, only the side reinforcement can be molded. All you have to do is mold it, and if it is symmetrical, you only need a mold for one side, so the mold can be made smaller, and the mold cost can be kept lower than when the whole thing is made into one piece. This has the effect of being able to. In addition, since the flange of the side reinforcement is designed to receive impact input from the longitudinal direction and the side of the vehicle through the bumper surfaces, damage to the side surfaces of the vehicle can be prevented, and the impact input from the sides of the vehicle can be prevented. The effect is that breakage can be prevented. In addition, the side reinforcement has a flange formed at the tip of the horizontal wall, and the bending line between this flange and each horizontal wall wraps around from the front or rear side of the vehicle to the side of the vehicle and curves. Since the flange portion is formed into a shape having a certain curvature, the shape retention of the flange portion is extremely high, and high rigidity can be obtained against impact input from an oblique direction. Furthermore, since the cross section is approximately U-shaped and constructed from a single steel plate, bending is the main process, press forming is easy, and formability is good. In addition, the center reinforcement is formed in a U-shaped cross-section that opens toward the vehicle body, so even if an upward or downward impact is applied to the center reinforcement, it will not open, thereby preventing the center reinforcement from opening toward the vehicle body. This eliminates the need for mounting plates, reducing the number of parts, weight, and cost.