JP6294128B2 - Bumper mounting structure - Google Patents

Description

  The present invention relates to a bumper mounting structure for an automobile, and more particularly, to a structure for mounting a bumper using a radiator support.

There exists a thing described in patent document 1 as this kind of bumper attachment structure.
In the bumper mounting structure described in the same document, a metal bumper stay is fixedly mounted on a resin radiator support, and a plurality of resin bumpers are fixedly connected to the bumper stay.

  However, according to the above structure, when there is a light collision to the bumper, the metal bumper stays to stretch the bumper, and it is difficult to sufficiently absorb energy at the time of the light collision. From the viewpoint of protecting pedestrians, it is desired to appropriately absorb energy and reduce the obstacle value even during a light collision.

Japanese Patent No. 3283426

  The present invention has been conceived under the circumstances as described above, and provides a bumper mounting structure capable of suitably absorbing energy and reducing an obstacle value even in a light collision with a bumper. The challenge is to do.

  In order to solve the above problems, the present invention takes the following technical means.

  A bumper mounting structure provided by the present invention is a structure for mounting a bumper by using a radiator support, and the radiator support includes a radiator upper support and a portion of the radiator upper support near the both ends in the vehicle width direction. A bumper mounting structure having a pair of left and right side pillars to be supported, wherein the structure is integrally formed with the radiator upper support so as to protrude forward from the radiator upper support, and bends in the vertical height direction. A deformable protruding piece portion and a pair of bumper receiving portions provided by attaching another member to the pair of side column portions or by being integrally formed with the pair of side column portions. The upper portion of the bumper near the center in the vehicle width direction is connected to and supported by the protruding piece, The both ends of the vehicle width direction have flange portions that protrude toward the rear side of the vehicle, and the flange portions are mounted and supported on the respective bumper receiving portions. When the load input exceeds a predetermined value from the front, the protruding piece portion is bent, the flange portion is dropped from each bumper receiving portion, and the bumper can be retracted. Yes.

According to such a configuration, the following effects can be obtained.
First, when a predetermined load or more is input from the front of the bumper, the protruding piece of the radiator upper support that supports the upper portion of the bumper near the center in the vehicle width direction bends and the upper portion of the bumper The flanges provided at the portions near the both ends in the vehicle width direction drop off from the respective bumper receiving portions, so that the bumpers can be moved backward. The backward movement of the bumper according to such an aspect can be performed accurately even during a light collision where the load input to the bumper is relatively small. Further, the bumper retreating operation is performed by rotating the bumper due to the bending deformation action of the protruding piece portion, so that the retraction amount of the bumper can be relatively large. For this reason, it is possible to favorably absorb energy at the time of a light collision with the bumper and reduce the obstacle value.
Secondly, the upper portion of the bumper near the center in the vehicle width direction is connected to and supported by a projecting piece that can be bent and deformed. Since the flange portion is placed on and supported by the bumper receiving portion, the bumper can be properly positioned and fixed in a normal state. In other words, the bumper becomes unstable just by supporting the bumper with the projecting piece that can be bent and deformed. The bumper can be stabilized.

In the present invention, preferably, the flange portion is placed below the f Ddoranpu, the bracket and the headlamp equipped with the bumper receiving portions, a support portion provided on the respective side pillar portion, It is attached in a co-tightened state using a common fastening member.

  According to such a configuration, the headlamp and the flange portion of the bumper positioned below the headlamp can be aligned with high accuracy, and the parting line thereof can be finished finely. That is, since the flange portion of the bumper is placed on the bumper receiving portion, it is possible to perform the alignment with high accuracy. On the other hand, according to the structure in which the bracket and the headlamp provided with the bumper receiving portion are fastened together with the support portion of the side column portion, the positioning of the bumper receiving portion and the headlamp can be performed with high accuracy. As a result, the bumper flange portion and the headlamp can be aligned with high accuracy, and it is possible to easily achieve the uniform width of the boundary portion between them.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

(A) is an exploded perspective view which shows an example of the bumper attachment structure which concerns on this invention, (b) is principal part sectional drawing of the assembly state of the bumper attachment structure shown to (a), (c) is It is sectional drawing of the other part of the assembly state of the bumper attachment structure shown to (a).

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
In the drawing, the arrow Fr indicates the front of the vehicle, the arrow W indicates the vehicle width direction, and the arrow Up indicates the upper side.

  The bumper mounting structure A shown in FIG. 1 is a structure in which the bumper 1 is mounted using the radiator support S. The bumper 1 is a front bumper and is made of resin.

The radiator support S includes a resin radiator upper support 2, a pair of left and right side column parts 3 made of resin, and a radiator lower support (not shown). A bumper receiving part 50 is provided.
The radiator upper support 2 has a main portion 20 extending in the vehicle width direction and a pair of auxiliary portions 21 extending from both ends of the main portion 20 toward the rear of the vehicle. For example, a hat shape or a U-shape is used. The auxiliary portion 21 is connected to, for example, a cowl or an apron member.

  A projecting piece portion 22 that projects toward the front side of the vehicle is integrally formed at the front portion of the main portion 20 of the radiator upper support 2. The projecting piece portion 22 is a piece-like flat plate having a free end on the tip side, and can be bent and deformed in the vertical direction. On the other hand, a flange portion 12 is provided at a portion near the center of the bumper 1 in the vehicle width direction so as to be fixedly connected to a portion near the tip of the protruding piece portion 22. The flange portion 12 and the projecting piece portion 22 are fixedly connected to each other by overlapping them vertically and inserting a screw body such as a clip 91 or a screw into the holes 12a and 22a provided in these.

  A pair of left and right flange portions 13 that are placed on and supported by a bumper receiving portion 50 to be described later are provided on the upper portion of the bumper 1 near both ends in the vehicle width direction. Each flange portion 13 has a shape protruding from the upper edge portion of the bumper 1 toward the vehicle rear side. In addition, the code | symbol 95 of FIG.1 (b) is the grille attached facing the opening part 19 provided in the approximate center part of the bumper 1 (illustration omitted in the figure (a)).

  The pair of side column portions 3 are portions that support portions near both ends in the vehicle width direction of the radiator upper support 2 and extend in the vertical height direction. Each side column portion 3 is integrally formed with a convex support portion 30 protruding outward in the vehicle width direction. The support portion 30 is originally a portion for fixing the headlamp 4, but in the present embodiment, as described below, a bumper receiving portion 50 for supporting the flange portion 13 is provided. It is also used for applications provided at predetermined positions.

  The bumper receiving portion 50 is configured by using a bracket 5 formed separately from the radiator support S. The bracket 5 is provided with a bumper receiving portion 50 formed in a block shape or a similar shape on the upper side of the support plate portion 51 provided with the bolt holes 52. As shown in FIG. 1C, the support plate 51 of the bracket 5 and the attachment piece 41 below the headlamp 4 are overlapped on the front surface of the support 30 and are bolted. The bolts 90 are inserted into the holes 52, 42, and 31 in a series, and are tightened together. The bolt 90 corresponds to an example of a fastening member in the present invention. The flange portion 13 of the bumper 1 is inserted from the front side of the vehicle into the gap 8 between the bumper receiving portion 50 and the headlamp 4 and is placed on the upper surface of the bumper receiving portion 50. Most of the weight of the bumper 1 is received by the bumper receiving portion 50, and in a normal state, the protruding piece portion 22 is in a state where there is no or almost no weight burden on the bumper 1. On the other hand, the flange portion 13 and the bumper receiving portion 50 are not in a fixed connection state using bolts or the like, but are in a state where the flange portion 13 is simply hooked on the bumper receiving portion 50. As a result, when there is a load input from the front of the vehicle as will be described later, the flange portion 13 can be dropped from the bumper receiving portion 50 as shown by the phantom line in FIG. It has become.

  Next, the operation of the above-described bumper mounting structure A will be described.

  First, as shown in FIG. 1B, when a predetermined load F or more is input to the bumper 1 from the front, the protruding piece 22 is bent downward, and as a result, the bumper 1 is deformed. As a result, the bumper 1 is deformed. 1 flange portion 13 is displaced to the front side of the vehicle and falls off from bumper receiving portion 50. When such a flange portion 13 is dropped, the bumper 1 is easily moved backward and downward with a relatively large stroke as indicated by an arrow D1 in FIG. It should be noted that, as a requirement for appropriately and smoothly performing such a rotation and retreat operation of the bumper 1, the center of gravity G1 of the bumper 1 in the mounted state is more vehicle than the connection point n1 between the protruding piece 22 and the bumper 1. Located on the front side.

When the backward movement due to the rotation and lowering of the bumper 1 as described above occurs, energy absorption for the input of the load F is appropriately performed. The lowering of the rotation of the bumper 1 due to the bending of the protruding piece 22 can be caused by a relatively weak force. Therefore, the energy absorbing function is appropriately exhibited even during a light collision with a relatively small load F, which is preferable for protecting pedestrians.

  Unlike the load input described above, in the normal time, the flange 13 at the top of the bumper 1 is placed on the bumper receiving portion 50, so that the weight of the bumper 1 is appropriately received by the bumper receiving portion 50. It has been. For this reason, it is appropriately avoided that the bumper 1 is unstablely supported in a state where the protruding piece portion 22 hangs downward. Since the flange portion 13 is provided in each of the upper portion of the bumper 1 near both ends in the vehicle width direction, it is possible to further stabilize the mounting state of the bumper 1 in a normal state.

  The flange portion 13 of the bumper 1 is located below the headlamp 4, but as described below, the dimension of the gap 8 between them is set to a desired dimension L with high accuracy, It is possible to finish the parting line in a beautiful state. That is, since the bracket 5 having the bumper receiving portion 50 is fastened together with the headlamp 4 using the bolt 90, the alignment accuracy between the bumper receiving portion 50 and the headlamp 4 can be increased. Is possible. As a result, the positioning accuracy between the flange portion 13 of the bumper 1 placed on the bumper receiving portion 50 and the headlamp 4 can be increased. Accordingly, it becomes easy to make the width of the gap 8 between the flange portion 13 and the headlamp 4 uniform, and the appearance of this portion can be improved.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the mounting structure of the bumper according to the present invention can be changed in various ways within the scope intended by the present invention.

  In the embodiment described above, the bumper receiving portion 50 is provided using the bracket 5 that is separate from the side column portion 3, but the present invention is not limited to this. For example, the bumper receiving portion can be integrally formed with the side column portion 3. Specifically, a convex part having an upward horizontal surface is integrally formed with the side column part 3, so that the convex part is used as a bumper receiving part, and the flange part 13 of the bumper 1 is placed on the bumper receiving part. it can.

A Bumper mounting structure S Radiator support 1 Bumper 13 Flange 2 Radiator upper support 22 Protruding piece 3 Side pillar (Radiator support)
30 Supporting part 4 Headlamp 5 Bracket 50 Bumper receiving part 90 Bolt (fastening member)

Claims (2)

It is a structure for mounting a bumper using a radiator support,
The radiator support is a bumper mounting structure having a radiator upper support and a pair of left and right side pillars that support portions near both ends of the radiator upper support in the vehicle width direction.
A projecting piece that is integrally formed with the radiator upper support so as to project forward from the radiator upper support and that can be bent and deformed in the vertical height direction;
A pair of bumper receiving portions provided by attaching another member to the pair of side column portions, or by being integrally formed with the pair of side column portions;
With
The vehicle width direction center part of the upper part of the bumper is connected to and supported by the protruding piece part,
The upper portion of the bumper near the both ends in the vehicle width direction has a flange portion that protrudes toward the vehicle rear side, and the flange portion is placed and supported on each bumper receiving portion,
When a predetermined load or more is applied to the bumper from the front side, the protruding piece portion is bent and the flange portion is dropped from each bumper receiving portion so that the bumper can be retracted. Bumper mounting structure characterized by that. The bumper mounting structure according to claim 1,
The flange portion is placed below the f Ddoranpu,
The bracket provided with each said bumper receiving part and the said headlamp are bumper attachment structures attached to the support part provided in each said side pillar part in the joint fastening state using a common fastening member.

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