JP2002029353A - Impact energy absorbing structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and smoothly absorb impact by a shock absorber when a impact load is input to a trimming material, by interposing the shock absorber as a spacer serving as an attaching member between a body and the trimming material when the trimming material is attached with a prescribed space in side the body. SOLUTION: The shock absorber 5 of a substantial quadrilateral closed cross-sectional shape having an upper face 51, a lower face 52 and left and right vertical wall faces 53 is used, the lower face 51 is attached to an upper face of a roof trim 4 of the trimming material by a clip 6, a clip 7 fixed to the upper face 51 is inserted into a roof brace 2 of the body to be lockedly attached, attaching work for the roof trim 4 of the trimming material is facilitated and simplified thereby, and the shock absorber 5 of the substantial quadrilateral (rectangular) closed cross-sectional shape is crushedly deformed to absorbingly moderate the impact surely and smoothly when the impact load F is input to an attaching part for the roof trim 4 of the trimming material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact energy absorbing structure for a vehicle.

[0002]

2. Description of the Related Art In a vehicle, it is necessary to provide an interval between a vehicle body and an interior material stretched inside the vehicle body for securing a shock absorbing stroke. Conventionally, for example, as shown in FIG. 4, a hat-shaped attachment part a is fixed to the vehicle body b side, and the interior material c is clipped to the attachment part a, or as shown in FIG. In general, a measure is taken such that the mounting portion d is formed by being recessed by a predetermined depth, and the mounting portion d is clipped to the vehicle body b.

Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-270675, a hat-shaped mounting part (clip mounting seat) having easily deformable inclined surfaces on both sides of the top is used.
There is also a hat-type attachment component in which a lower flange portion is riveted to an interior material and a top portion is attached to a vehicle body with a clip.

[0004] It should be noted that even if interior materials are stretched over a vehicle body,
For example, interior materials provided on relatively small body parts such as body pillars are relatively easy to install, but large interior trims (roof trims), especially large ones such as one-box cars and wagon cars, are required. In the case of mounting, since a predetermined strength is required for the mounting member, a hat-shaped mounting member superior in strength as described above is conventionally used, or a mounting portion d having a hat-shaped cross section is formed in the interior material. They are adopting a strategy.

[0005]

Among the above-mentioned prior arts, as shown in FIG. 4, a method of attaching an interior material c to a vehicle body b using a hat-shaped attachment part a is generally a hat-shaped one. Although it is excellent, it has a large resistance to impacts, so it has a problem that the shock absorption becomes insufficient at the mounting part by the hat-shaped mounting part a, and the interior material c is recessed as shown in FIG. The method of clipping to the vehicle body b with the formed mounting portion d is that the mounting portion d has a hat-shaped cross-sectional shape, so that impact absorption at this portion is insufficient and the appearance is not very preferable. Has issues.

Further, in the measure disclosed in Japanese Patent Application Laid-Open No. Hei 6-270675, in which an interior material is mounted with a hat-type mounting part, an impact load is applied since easily deformable inclined surfaces are provided on both sides of the top of the mounting part. At this time, the impact is absorbed by deforming on the inclined surface. However, the load range that can absorb shock is within the extremely limited range of the deformation mode on the inclined surface, and when a load larger than that is applied, the resistance of the attached parts suddenly increases, so the smooth shock absorption function is It has a problem that it cannot be expected at all.

An object of the present invention is to solve the above-mentioned conventional problems.

[0008]

According to the present invention, when an interior material is disposed at a predetermined distance from the vehicle body on the interior side of the vehicle body, for example, a quadrilateral (rectangular) is formed between the vehicle body and the interior material. ) Is arranged such that the axis of the closed cross section is substantially parallel to the interior material, and the shock absorber and the interior material are connected with a clip, and the shock absorber is connected to the interior material. By connecting the vehicle body with the clip, when a shock load is applied to the mounting part of the interior material by the shock absorber, the shock absorber having a closed cross-sectional shape is crushed and deformed, and the shock is absorbed reliably and smoothly. It is something to do.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 shows a first embodiment of the present invention, in which an interior material of a roof, that is, a roof trim is attached to a vehicle body, that is, a roof brace via an impact absorber.

In FIG. 1, 1 is a roof panel of a vehicle,
Reference numeral 2 denotes a roof brace, and the roof brace 2 is formed of a closed cross-section member in the vehicle width direction as conventionally known, and both ends thereof are fixed to left and right side rails (not shown).
The lower surface of the roof panel 1 is joined and supported on the upper surface of the roof brace 2 via a sealer 3. One or a plurality of roof braces 2 are provided to ensure the strength and rigidity of the vehicle body.

4 is an interior material, that is, a roof trim,
The roof trim 4 is stretched by a shock absorber 5 at a predetermined interval below a vehicle body, for example, a roof brace 2.

The shock absorber 5 has a substantially quadrangular (rectangular) closed cross-sectional shape including an upper surface 51, a lower surface 52, and left and right vertical wall surfaces 53, 53.
Are fixed so as to protrude upward, and an engagement hole 52 a of the roof trim mounting clip 7 is provided at a substantially central portion of the lower surface 52. The shock absorber 5 is formed integrally with a synthetic resin or by sheet metal. The clips 6 and 7 are made of the same synthetic resin as that generally used conventionally.

In the illustrated embodiment, a clip 6 made of synthetic resin is fixed to a shock absorber 5 made of synthetic resin or sheet metal. However, the shock absorber 5 and the clip 6 are made of synthetic resin. It is good also as a structure formed integrally.

The impact absorber 5 having the above-mentioned closed cross-sectional shape is configured such that the clip 7 is inserted into a predetermined position (a plurality of positions) on the roof trim 4 in such an arrangement that the axis XX of the closed cross-section is substantially parallel to the roof trim 4. The roof trim 4 is fixed to the roof brace 2 by inserting the clip 6 fixed to the upper surface 51 of the shock absorber 5 into the mounting hole 2a provided in the vehicle body, for example, the roof brace 2 and engaging the clip. Can be mounted with an interval D. Since the roof trim 4 can be mounted on the roof brace 2 only by inserting the clips 6 and 7 in this manner, the mounting operation can be facilitated and simplified. The peripheral portion of the roof trim 4 is, for example, sandwiched between pillar portions or locked at a place where the external appearance is inconspicuous as before using a rearview mirror or a mounting portion for a room lamp.

As described above, the shock absorber 5 has a function as a mounting member for the roof trim 4 and a function as a spacer for securing a predetermined distance D, and when an impact load is applied, the load F is applied. As a result, the closed cross-sectional shape of the quadrilateral (rectangular) is crushed and deformed, and also has a shock energy absorbing function of absorbing a shock.

That is, when an upward impact load F is input to the roof trim 4 due to a vehicle collision or the like, and if the impact load F is located at a position other than the mounting portion, the distance D from the vehicle body becomes an impact absorption stroke. Shock is absorbed during the stroke. When the input position of the impact load F is the mounting portion, the impact is absorbed by the shock absorber 5 having a closed shape of a quadrilateral (rectangle) gradually crushing and deforming as shown in FIG. 3, for example. Is done. When a larger load F is applied, the clip 7 made of synthetic resin is deformed or damaged by hitting the vehicle body side, so that the impact can be reliably and smoothly absorbed.

If the shock absorber is a hat type as in the prior art, the striking force of the vertical wall surface is hardly deformed in response to the input of an impact load. It has been confirmed that the tension force of the vertical wall surface 53 is not very large, and that the vertical wall surface 53 is properly crushed and deformed to absorb impact.

FIG. 2 shows a second embodiment of the present invention. In this embodiment, the left and right vertical wall surfaces 53 of the shock absorber 5 having a substantially quadrangular (rectangular) closed cross-sectional shape are substantially vertical. The only difference from the first embodiment shown in FIG. 1 is that a cut or recessed groove 53a, 53a substantially parallel to the upper and lower surfaces 51, 52 is provided at the center, and other configurations are the same as those in FIG. is there. 2, the same reference numerals as those in FIG. 1 indicate the same parts as those in FIG.

In the second embodiment, a cut or groove 53a is provided in the vicinity of the center of the vertical wall surface 53 of the shock absorber 5 having a quadrangular (rectangular) closed cross-sectional shape. When the impact load F is input to the mounting portion of, it is easy to be crushed and deformed at the cut or the concave groove 53a, and the deformation mode of the shock absorber 5 can be set.

In the above embodiment, the case where the roof trim 4 is attached to the roof brace 2 at a predetermined interval D has been described. However, the shock absorber 5 according to the present invention is not limited to the roof trim, but may be a door trim, a rear side trim, or the like. It can be used when attaching any interior material to a vehicle body (including a door panel).

In each of the above-described embodiments, the shock absorber 5 has a substantially quadrangular (rectangular) closed cross-sectional shape. However, the shock absorber 5 may be a polygon other than a pentagon, for example. May have a closed cross-sectional structure of any shape such as a circle or an ellipse. Then, the shock absorber 5 having the closed cross section is attached to the interior material with a clip such that the axis of the closed cross section is substantially parallel to the interior material, and the shock absorber 5 is attached to the vehicle body by clipping. The goal can be achieved.

[0023]

As described above, according to the present invention, it is possible to facilitate and simplify the work of attaching the interior material, and to ensure that when an impact load is applied to the interior material attachment portion, the impact is reliably prevented. In addition, it can absorb and relax smoothly, and can improve the impact energy absorbing function, and can bring about a great effect in practical use in combination with the cost reduction.

[Brief description of the drawings]

FIGS. 1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view of a roof trim mounting portion, and FIG. 1B is a perspective view of a shock absorber.

FIGS. 2A and 2B show a second embodiment of the present invention, in which FIG. 2A is a cross-sectional view of a roof trim mounting portion, and FIG. 2B is a perspective view of a shock absorber.

FIG. 3 is a cross-sectional view showing an example of a collapsed deformation state of the shock absorber shown in FIGS. 1 and 2;

FIG. 4 is a cross-sectional view showing an example of a conventional roof trim mounting portion.

FIG. 5 is a cross-sectional view showing another example of a conventional roof trim mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roof panel 2 Roof brace 2a Mounting hole 4 Roof trim 5 Shock absorber 51 Upper surface 52 Lower surface 52a Engagement hole 53 Vertical wall surface 53a Cut or concave groove 6 Clip 7 Clip

Claims (4)

[Claims] An impact absorber having a closed cross section is provided between a vehicle body and an interior material disposed at a distance required for absorbing shock from the vehicle body toward the interior of the vehicle, and the axis of the closed cross section is substantially parallel to the interior material. The shock absorber and the interior material are connected by a clip, and the shock absorber and the vehicle body are connected by a clip, so that an impact load is applied to a mounting portion of the interior material by the shock absorber. A shock energy absorbing structure for a vehicle, wherein a shock absorber having a closed cross-sectional shape is crushed and deformed to absorb a shock when input. 2. The shock absorber according to claim 1, wherein the shock absorber has a substantially quadrilateral closed cross-sectional shape having an upper surface, a lower surface, and left and right vertical wall surfaces, and the lower surface is connected to an interior material by a clip. An impact energy absorbing structure for a vehicle, wherein the impact energy absorbing structure is connected to a vehicle body by a clip provided on the vehicle. 3. The shock absorber according to claim 2, wherein
A vehicle or a vehicle characterized in that substantially parallel cuts or grooves are provided on the upper and lower surfaces near the vertical center of the left and right vertical walls, and the vertical walls are easily crushed and deformed by the cuts or the grooves. Impact energy absorbing structure. 4. The vehicle body according to claim 1, wherein the vehicle body is a roof brace which is a frame member in a vehicle width direction of the roof, and the interior material is attached to the interior of the roof brace at a predetermined interval. Energy absorbing structure for a vehicle, characterized in that the structure is a roof trim.