JPH0541966Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a bumper for a vehicle.

[Prior Art] In general, impact energy during a collision in a vehicle is absorbed and alleviated by a bumper.

For example, as shown in FIG. 6, a vehicle bumper has a bumper skin 109 (bumper fascia) attached to upper and lower mounting flanges 105 and 107 of a reinforcing member 103 (armature) that is fixed to a bumper stay 101 extending from a strength member of the vehicle body. is fixed with bolts 111 and nuts 113.

Note that 115 indicates a foam material provided inside the bumper skin 109, and 117 indicates a vehicle body outer plate (apron, etc.). (Refer to Japanese Unexamined Patent Publication No. 59-48250) [Problems to be solved by the invention] As mentioned above, the bumper skin 109 is made up of the reinforcing member 1.
When a force F is applied to the bumper skin 109 from where it is fixed to the bumper skin 109 during a light collision, for example, the bumper skin 109 deforms greatly as shown by the chain line, and absorbs and alleviates the impact energy through this deformation.

In this case, the bumper skin 109 has a shape that deforms from a part that is easy to bend, for example, the bumper skin attachment part.
7, and this interference causes a problem in which the outer panel 117 of the vehicle body is also seriously damaged.

For this purpose, for example, a gap α between the upper surface of the bumper skin 109 and the vehicle body skin 117 is created so that the bumper skin 109 does not interfere with the vehicle body skin 117 when the bumper skin 109 is deformed.
Although it is possible to consider measures such as ensuring a large gap α, a problem arises in that increasing the gap α impairs the appearance quality.

Therefore, this idea does not interfere with the exterior parts of the car body even if the bumper skin is bent and deformed, and also makes it easier to install the bumper skin while reducing the number of parts, and increases the rigidity of the installation area. The object of the present invention is to provide a bumper for a vehicle.

[Means for Solving the Problems] In order to achieve the above object, this invention includes a reinforcing member in the vehicle width direction that is arranged under the vehicle body exterior member and fixed to the strength member of the vehicle body. , a vehicle bumper comprising a bumper skin that is attached to a reinforcing member via a fixing means and whose front half side protrudes from the vehicle body exterior member, at least at a position corresponding to the fixing means on the inner side of the upper surface of the bumper skin, Further, reinforcing ribs are provided in a region from the front surface of the vehicle body exterior member to the bumper skin attachment portion, and a receiving portion of the fixing means is cut out.

[Function] In such a bumper, the fixing means does not fall due to the notch provided in the reinforcing rib without using a temporary holding clip, and the bumper can be easily attached to the reinforcing member. On the other hand, during a light collision, the bumper skin undergoes significant bending and deformation due to the impact of the collision, and this deformation absorbs and alleviates the impact energy. In this case, while the stiffness of the upper surface side of the bumper skin and the attachment area is increased by the reinforcing ribs, the bumper skin has a shape that bends and deforms from the area away from the reinforcing ribs, so there is no interference with the vehicle body exterior member. Therefore, the gap between the vehicle body exterior parts and the upper surface of the bumper skin can be set small, so that the appearance quality is not impaired.

[Example] This will be explained below with reference to the drawings.

FIGS. 3 and 4 show an embodiment of this invention. Before going into the explanation of Figures 3 and 4,
A specific mounting structure for a bumper stay will be described with reference to FIGS. 1 and 2 for a conventional example equipped with general reinforcing ribs.

In the figure, 1 indicates an exterior member of an automobile body (such as an apron), and 3 indicates a bumper.

The bumper 3 is made up of a metal reinforcing member 7 (armature) fixed to a bumper stay 5 extending from a strength member (not shown) of the vehicle body, and a synthetic resin bumper skin 9 fixed to the reinforcing member 7.
(Bumper fascia).

The reinforcing member 7 is formed of an outer panel 11 and an inner panel 13 into a box shape with a closed cross section that is long in the width direction of the vehicle, and has mounting flanges 15 and 17 on the upper and lower sides.

The bumper skin 9 is formed into an inverted U-shape in cross section by an upper surface portion 19, a front surface portion 21, and a lower surface portion 23.
The end portion 19a of the bolt 9 is bent vertically inward and fixed to the upper mounting flange 15 of the reinforcing member 7 by a bolt 27 protruding from the retainer 25 and a nut 29 screwed into the threaded portion of the bolt 27. ing.

End portion 23a of the lower surface portion 23 of the bumper skin 9
is fixed to the lower mounting flange 17 of the reinforcing member 7 by a pad 31, a bolt 33 passing through the pad 31, and a nut 35 screwed into the threaded portion of the bolt 33.

On the other hand, the front half side of the bumper skin 9 largely protrudes forward from the front surface 1a of the vehicle body exterior member 1, and the inside thereof is filled with a foam material 37.

3 and 4 show an embodiment according to this invention. For example, when an external force F is applied as shown by the chain line in FIG. 1, the front part of the vehicle body exterior member 1 is deformed. A specific example in which reinforcing ribs 39 are provided over the region D is shown.

That is, on the inside of the upper surface portion 19 of the bumper skin 9,
In addition, a reinforcing rib 39 is provided within a region D from the surface 1a of the vehicle body exterior member 1 to the bumper skin attachment portion.

The reinforcing rib 39 has a tapered shape that rises toward the retainer 25 side. Furthermore, the reinforcing rib 39
A notch recess 41 is provided by cutting out a receiving portion facing the head of the retainer 25 serving as a fixing means.
This prevents the retainer 25 from falling off due to the notch recess 41, so the retainer 25
This makes it possible to omit the temporary holding clip.

FIG. 4 shows a modification of the cutout recess 41. As shown in FIG. The notch recess 41 is located in the inner region D of the upper surface portion 19.
By forming a thick part 43 within the vehicle width direction and further providing a tapered reinforcing rib 39 on the thick part 43, the vertical surface 39a of the reinforcing rib 39 and the lower surface of the thick part 43 It is also possible to form

According to the bumper 3 configured in this way, the retainer 25 can be attached without using a temporary holding clip.
Since the notch recess 41 prevents it from falling out, the installation work can be easily performed. On the other hand, as shown in FIG. 1, when an external force F acts on the bumper 3 due to an impact during a light collision, the bumper skin 9 bends and deforms to absorb and alleviate the impact energy during the collision.

When absorbing this impact, the upper surface 19 of the bumper skin 9
is bent outside the area of the reinforcing ribs 39, which have weak surface rigidity, so that even if the bumper skin 9 is significantly deformed, it will not interfere with the vehicle body exterior member 1. Therefore, damage is suppressed to only the bumper 3, and the gap between the upper surface portion 19 and the vehicle body exterior member 1 can be set small, without degrading the appearance quality. In this case, if a thin wall portion 45 is formed on the inside of the upper surface portion 19 at the front end side of the reinforcing rib 39 as shown in FIG. can be specified.

Although this embodiment has been described with respect to a front bumper, it is also possible to apply the present invention to a rear bumper.

[Effects of the invention] As explained above, according to the vehicle bumper of this invention, the notch in the receiving portion provided in the reinforcing member can prevent the fixing means from falling off.
This eliminates the need for temporary holding clips and improves the installation work. Further, since the rigidity of the region of the reinforcing ribs and the area around the fixing means can be increased, damage to the vehicle body exterior member can be prevented. Therefore, the only repair required is replacing the bumper. Furthermore, since the gap between the vehicle body exterior member and the upper surface of the bumper can be set small, the appearance quality is also very favorable.

[Brief explanation of the drawing]

Fig. 1 is a sectional view taken along the line - - of Fig. 2 showing the mounting structure of a conventional vehicle bumper equipped with reinforcing ribs, Fig. 2 is a perspective view of an automobile showing the cross-sectional area of Fig. 1, and Fig. 3 4 and 5 are cross-sectional views of a vehicle bumper showing an embodiment of this invention, and FIG.
The figure is a sectional view similar to FIG. 1 showing a conventional example without reinforcing ribs. Explanation of main drawing symbols, 1...Vehicle body exterior member (apron, etc.), 3...Bumper, 7...Reinforcement member, 9...Bumper skin, 19...Top surface part, 39
...Reinforced ribs.

Claims (1)

[Scope of utility model registration request] A reinforcing member in the width direction of the vehicle is disposed below the vehicle body exterior member and is fixed to a strength member of the vehicle body, and a bumper skin is attached to the reinforcement member via a fixing means and has a front half protruding from the vehicle body exterior member. In the vehicle bumper, a reinforcing rib is provided at least at a position corresponding to the fixing means on the inner side of the upper surface of the bumper skin, and within a region from the front surface of the vehicle body exterior member to the bumper skin mounting portion, and A vehicle bumper characterized by having a receiving part for a fixing means cut out.