JPH0641893Y2 - Bumper structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) This invention relates to a bumper structure of an automobile.

(Prior Art) Generally, a bumper of an automobile includes an armature that is a strength member and a bumper fascia that absorbs collision energy by deforming at the time of a collision, and the armature is fixed to a vehicle body through a support stay. The bumper fascia is connected to the armature, and a typical conventional example thereof is shown in FIGS. 6 and 7.

In the figure, 101 is an armature, and 103 is a bumper fascia, respectively, and a T-rib 105 extending downward from the upper end of the bumper fascia 103 is joined to the upper end flange 107 of the armature 101 by bolts and nuts. The lower end 109 of the bumper fascia 103 is connected to the lower surface of the armature 101 with bolts and nuts (see Japanese Utility Model Laid-Open No. 62-189267).

(Problems to be Solved by the Invention) As described above, since the T-rib 105 of the bumper fascia 103 is superposed and coupled to the upper end flange 107 of the armature 101, the T-rib 105 and the upper end flange 107 have corresponding shapes. ing.

That is, in a vehicle model in which the body of the vehicle body has a rounded shape, the fascia main body 111 of the bumper fascia 103 also has a large bent (camber) shape, so that the upper end flange 10
7 also has a shape with large bending. Therefore, as shown in FIG. 7, the armature 101 has a shape along the bend of the fascia body 111 so that the upper mounting portion 105 corresponds to the upper end flange 107.

In this case, it was necessary to provide a large number of beads for wrinkle removal from a place where the metal armature 101 was largely bent. For this reason, it is easy to bend around the bead as a fulcrum due to the impact at the time of a light collision, which causes a large breakage and is a factor that deteriorates the light collision performance.

Therefore, the present invention aims to provide a bumper structure capable of improving the light collision performance.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, in the present invention, a vertical surface is provided below the upper end of a bumper fascia having a U-shaped cross section. To form a horizontal plane continuously, and at the end of this horizontal plane, an upper mounting portion that is smaller than the curvature of the bumper fascia main body is hung integrally along the longitudinal direction, and at the angle portion consisting of the vertical plane and the horizontal plane, Reinforcing ribs on the vertical surface and the horizontal surface are provided, and the upper mounting portion of the bumper fascia is attached to the vehicle body side with the upper flange of the armature formed with a curvature substantially equal to the curvature of the upper mounting portion and the lower end of the bumper fascia. The parts are respectively connected to the lower surface of the armature.

(Operation) According to such a bumper structure, even if the bumper fascia is formed with a large curvature, the armature has a shape with a small curvature, and the number of beads for wrinkle removal is small, so even if an impact load acts on the armature, it is easy. It will not bend and the rigidity will be secured.

Also, since the upper end is matched to the curvature of the bumper fascia and the reinforcing ribs are provided on the angle part, the bumper fascia deforms starting from the upper end in a light collision, so it has no effect on other body parts. It will be as small as possible.

(Embodiment) An embodiment of the present invention will be described in detail below with reference to the drawings of FIGS. 1 to 5.

In the figure, reference numeral 1 denotes a rear side bumper, and the bumper 1 is composed of an armature 3 and a bumper fascia 5.

The bumper fascia 5 is made of synthetic resin and has a shape in which the bumper sides 9 are extended from a bumper fascia main body 7 having a U-shaped cross section that is long in the vehicle width direction.

A horizontal plane 15 is continuously formed below the upper end portion 7a of the bumper fascia body 7 via a vertical surface 17, and the horizontal plane 15 is formed.
An upper mounting portion 13 which is smaller than the curvature R of the bumper fascia main body 7a and is substantially linear is suspended vertically from the end portion of the above. Therefore, the upper mounting portion 13 is horizontal.
The upper end 7a is provided via an angle portion 19 formed by 15 and the vertical surface 17.
The horizontal plane 15 has a maximum depth in the central portion and becomes gradually smaller in both lateral directions (see FIG. 5). Further, the angle portion 19 is provided with a plurality of reinforcing ribs 21 on the horizontal surface 15 and the vertical surface 17 to secure the strength of the area of the angle portion 19.

On the other hand, the armature 3 has a metal outer 23 and an inner.
The upper flanges 23a, 25a of 25 and the lower flanges 23b, 25b are closed to form a closed cross-section box, and
It is fixedly supported by a strength member 29 of a vehicle body 28 via 27 and has a shape close to a straight line corresponding to the upper mounting portion 13 of the bumper fascia 5.

The upper flange 23a on the outer 23 side of the armature 3 is extended and projected upward, and the upper mounting portion 13 and the bolt 31 and nut are attached.
Bound by 33.

Further, a lower end portion 7b of the bumper fascia 5 is fixedly coupled to a lower surface portion of the outer 23 side by a bolt 35 and a nut 37.

The reference numeral 39 designates a side shield provided above the bumper fascia 5 and between the inclined surface of the rear end panel 41.

According to the bumper 1 thus configured, the upper mounting portion 13 of the bumper fascia 5 is coupled to the upper flange 23a of the armature 3 so that the bumper fascia 5 having a large curvature R can be coupled without any trouble. On the other hand, when the armature 3 has a shape close to a straight line, the bead for wrinkle removal is unnecessary, so the armature 3 can be used during a light collision.
Even if an impact load is applied to, the exertion force is exerted against the impact load, and the damage that would cause a large damage is prevented.

Further, since the upper end portion 7a is adapted to the curvature of the bumper fascia 5 and the angle portion 19 is provided with the reinforcing rib 21, the bumper fascia 5 starts from the upper end portion 7a at the time of a light collision as shown in FIG. Since it is deformed, damage to the site shield 39 having a curvature can be prevented.

[Advantage of Device] As described above, according to the bumper structure of the present invention, since the bumper fascia having a large curvature is attached to the upper flange of the armature smaller than the curvature of the bumper fascia without hindrance, the bead for removing armature wrinkles can be installed. You can reduce the number. In addition, the bumper fascia is deformed at the upper end during a light collision due to the reinforcing ribs provided on the angled portion. As a result, the rigidity is improved, the light collision performance is improved, and the damage and the like can be minimized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a bumper of this invention, and FIG.
Fig. 4 is a sectional side view taken along the line II-II in Fig. 4, Fig. 3 is an operation explanatory diagram, Fig. 4 is a perspective view showing a rear portion of an automobile to which the bumper of the present invention is applied, and Fig. 5 is a plan view. 6 and 7 are explanatory views showing a conventional general bumper. 3 ... Armature 5 ... Bumper fascia 7 ... Bumper fascia body 7b ... Bottom part 13 ... Top mounting part 15 ... Horizontal surface 17 ... Vertical surface 19 ... Angle part 21 ... Reinforcing rib 23a ... Top flange

Claims (1)

[Scope of utility model registration request] 1. A horizontal plane is continuously formed below a top end of a bumper fascia having a U-shaped cross section through a vertical plane, and an upper mounting portion smaller than the curvature of the bumper fascia body is formed at the end of the horizontal plane. Along with the longitudinal direction, the angle portion formed by the vertical surface and the horizontal surface is provided with a reinforcing rib for the vertical surface and the horizontal surface, and the upper mounting portion of the bumper fascia is attached to the vehicle body side. A bumper structure in which a lower end portion of a bumper fascia is coupled to an upper flange of an armature that is fixedly formed and has a curvature substantially equal to that of the upper attachment portion, and a lower surface portion of the armature.