JP3682794B2 - Impact beam support structure for automobile doors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support structure for an impact beam that is attached for the purpose of ensuring strength and rigidity against a collision (hereinafter referred to as “side collision”) of a car door mainly from the side.
[0002]
[Prior art]
Conventionally, in order to further improve the function of the impact beam at the time of a side collision, the support structure for the door is disclosed in, for example, Japanese Utility Model Laid-Open No. 57-189921 or Japanese Utility Model Laid-Open No. 58-156012. Various improvements have been made.
[0003]
[Problems to be solved by the invention]
However, even in these conventional impact beam support structures, there is a point that should be further improved. That is, for the beam body, the structural strength is secured by using, for example, a pipe material or a substantially flat plate shape that is undulated in the thickness direction by press molding. As for the support structure for the door at the front end, especially the front end, it is connected to the vicinity of the front end of the door through an extension of a thin plate structure with almost no undulation in the thickness direction or a thin plate portion without such undulation (hereinafter simply referred to as extension) It was a composition. This is because the front end of the beam body must be supported in the vicinity of the hinge as much as possible so that the impact received by the beam main body is received by the pillar via the hinge. For this reason, the vehicle width direction between the outer panel and the inner panel is required. The supporting structure is coupled via a thin plate structure extension that can enter a slight gap.
[0004]
Since the extension itself is lower in strength than the beam body, the impact received by the beam body cannot be effectively transmitted to the pillar. It was necessary to further improve the beam support structure.
[0005]
In view of the above, an object of the present invention is to provide a support structure for an impact beam that can sufficiently enhance the function and function of the impact beam and further enhance the strength and rigidity of the door against the side collision.
[0006]
[Means for Solving the Problems]
For this reason, this invention was set as the support structure of the structure described in the said each claim.
According to the support structure of claim 1, since it is supported by the first and second extensions that form a closed cross-sectional structure with the door front end surface, the structure is supported only by the conventional first extension. In comparison, the impact beam is supported more firmly on the front end surface of the door, so that the impact received by the impact beam can be received more effectively by the pillar via the hinge, and the absorption and dispersion of the collision energy can be further enhanced. .
Also, as possible out to receive most efficiently the impact from the vehicle side to be applied to the impact beam.
[0007]
According to the support structure of the second aspect, the impact received by the impact beam can be received by the pillar via the hinge more directly. Further, since the folded portion of the second extension is overlapped with the hinge mounting portion, the door front end surface is reinforced and the hinge mounting rigidity is increased. Further, since the second extension is attached to the door front end face by using hinge attachment, no special attachment means for the door front end face is required, and the assemblability is good in this respect.
[0008]
3. The support structure according to claim 1, wherein the first extension is further coupled to the door front end surface at a position outside the hinge in the width direction of the automobile, and the second extension is coupled to the hinge in the width direction. by also a structure in which bonded to the door front face at the inside position, the first extension and the second extension, because it is coupled to the door front surface when straddling the hinge in the width direction of the automobile, the side impact direction Since the rigidity of the extension itself with respect to the impact increases, and the support rigidity of the impact beam increases, the impact received by the impact beam can be effectively received by the pillar via the hinge.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows a state in which the right front door of the automobile is viewed from the indoor side. The door 1 has a main body portion 1b having a bag structure in which an outer panel 2 and an inner panel 3 are integrated by hemming, and a window frame portion 1a attached to the upper portion of the main body portion 1b. In addition to various reinforcing members such as an impact beam 10 for ensuring the rigidity of the door 1 against a side collision, functional parts such as a window glass and a window regulator are incorporated in the main body 1b.
[0010]
A hinge side panel 6 forming a front end surface of the door is welded to the front portion of the inner panel 3, and the outer panel 2 and the inner panel 3 are hemmed to the front portion of the door 1 via the hinge side panel 6. It is integrated. In the figure, H indicates the hemming portion. Two hinges 4, 4 are mounted on the hinge mounting surface 6 a of the hinge side panel 6 at a predetermined interval in the vertical direction, and the door 1 opens and closes to the front pillar 5 via the hinges 4, 4. Installed as possible.
[0011]
Now, the impact beam 10 for side collision countermeasures is mounted substantially horizontally from the front end to the rear end of the door 1. In this embodiment, the impact beam 10 is made of a pipe material, and its front end is supported by the hinge side panel 6 via two extensions 20 and 21 as shown in FIGS. Yes. Since the support structure of the rear end portion of the impact beam 10 is not particularly changed, the description thereof is omitted.
[0012]
The first extension 20 corresponds to a conventional single extension. One end of the first extension 20 is welded to the front end of the impact beam 10 as shown in FIG. 3, and the other end extends forward, and the outer panel 2 and the hinge are hinged. A slight gap between the side panel 6 and the hinge 4 is welded 20a to the hinge side panel 6 at a position reaching the side of the hinge 4.
[0013]
Since the first extension 20 needs to enter a slight gap between the outer panel 2 and the hinge side panel 6 as described above, at least the portion to be inserted as shown in FIG. There is no thin plate shape. This is the same as in the prior art.
[0014]
Next, the second extension 21 has a substantially U-shaped bent shape in plan view, as shown in the figure, and one end of the second extension 21 is superimposed on the lower surface of the first extension 20 as shown in FIG. , 10b. The second extension 21 extends from the front end portion of the impact beam 10 so as to wrap around inwardly (downward in the figure, on the inner panel 3 side), thereby reaching the inner side of the hinge 4.
[0015]
Accordingly, the bent edge 21 a of the second extension 21 extends from the inside toward the outside rather than the hinge 4, and is finally sandwiched between the hinge side panel 6 and the hinge retainer 7. Although not shown, the bent edge 21a is formed with a bolt hole for inserting a bolt for mounting the hinge, and the position thereof is aligned with the weld nut 7a welded to the hinge retainer 7. Is set. For this reason, when the bolt is fastened to the weld nut 7 a of the hinge retainer 7 to attach the hinge 4, the bent edge 21 a of the second extension 21 together with the hinge 4 overlaps the hinge mounting surface 6 a of the hinge side panel 6. The fixed state is fixed.
[0016]
As described above, the first and second extensions 20 and 21 are coupled to the hinge side panel 6 so that the space between the extensions 20 and 21 and the hinge mounting surface 6a of the hinge side panel 6 is as illustrated. A substantially triangular closed cross-sectional structure is formed. The front end portion of the impact beam 10 is supported in the vicinity of the hinge 4 by two extensions 20 and 21 that form such a closed cross-sectional structure.
[0017]
According to such a configuration of the present embodiment, the front end portion of the impact beam 10 is supported by the two extensions 20 and 21, and both the extensions 20 and 21 are opened in the side-projection direction (width direction) to be hinged side. Since it is coupled to the panel 6, the strength and rigidity of the support structure at the front end of the impact beam 10 are remarkably improved. In particular, in the present embodiment, since the closed cross-sectional structure is a substantially triangular shape made of different members, there is no portion with low strength, and high strength and rigidity can be ensured.
[0018]
In this regard, conventionally, since only a single extension corresponding to the first extension 20 in the present embodiment is supported, when the impact beam is pushed inward during a side collision, this one extension is compared. Therefore, the impact caused by the side impact is not effectively transmitted to the pillar through the hinge, and the door is greatly deformed.
[0019]
However, according to the support structure according to the present embodiment, the front end portion of the impact beam 10 is firmly supported by the two extensions 20 and 21, so that the impact received by the impact beam 10 is effectively pillars through the hinge 4. 5, the deformation of the door 1 can be minimized.
[0020]
Further, in the present embodiment, the bent edge 21a of the second extension 21 is sandwiched between the hinge retainer 7 and coupled to the hinge side panel 6 together with the attachment of the hinge 4; No means is required, and the assembly of the impact beam 10 can be simplified in this respect.
[0021]
Furthermore, since the bent edge 21a of the second extension 21 is superimposed on the hinge mounting surface 6a of the hinge side panel 6, the mounting strength of the hinge 4 is improved.
[0022]
Next, various modifications can be made to the embodiment described above. For example, as shown in FIG. 4, the bent edge 22a of the second extension 22 is not fastened together with the hinge 4, but is separately coupled to the hinge side panel 6 by spot welding 22b. The extensions 21 can be coupled more inwardly, that is, with a greater distance from the first extension 20.
[0023]
The second extension 22 is coupled to the hinge side panel 6 by spot welding. However, a high mounting strength is ensured because a force acts on the spot welded portion 22b in a direction in which the second extension 22 is pressed during a side collision. The first extension 20 is welded 10a relative to impact beam 10 is 10a, the second extension 22 is welded 10b against the first extension 20, is that they are 10b, the embodiment (FIG. 3 See).
[0024]
According to such a configuration, even when the hinge 4 and the second extension 22 are difficult to be coupled due to, for example, production, it is possible to ensure the same performance as that of the above-described embodiment. In this configuration, it is also possible to set the bent edge 22a to be longer outward (upward in the figure) and sandwich it with the hinge retainer 7 so that it can be fastened together with the hinge 4.
[0025]
Further, the impact beam 10 is not limited to the pipe material exemplified above, but may be a plate material having a strength formed by press-molding a plate material as shown in FIG. Even if it exists, the same effect can be obtained by additionally setting the second extension 21. In this case, the thin plate portion 11 a at the tip of the impact beam 11 corresponds to the first extension 20. Therefore, in addition to the case where the first and / or second extensions 20 and 21 are manufactured separately from the impact beam 10, the extension beam is a type of impact beam in which the extension portion is integrally formed by pressing as described above. However, the same applies.
[0026]
Furthermore, although the hinge side panel 6 is illustrated as a type of door 1 that is manufactured separately from the inner panel 3 and welded, the door may be a type of door that is manufactured as a single unit at the stage of press molding. The same applies.
[0027]
Further, the second extension 21 (22) is illustrated as being configured to wrap inward from the hinge 4. However, as long as it is allowed from the viewpoint of the layout of the functional components or the necessary support rigidity, the second extension 21 (22) is used. It is also possible to adopt a configuration in which the two extensions 21 are turned outward with respect to the hinge 4 to form a cross-section closing structure with the first extension 20.
[0028]
Finally, in the embodiment shown in FIG. 1, the bent edge 21 a and the hinge side panel 6 are not limited to the illustrated joint fastening, and may be joined by welding, and the retainer 7 is omitted and the hinge side panel 6 is omitted. Further, the weld nut 7a may be welded to the rear door, and various configurations exemplified above can be adopted for the rear door.
[Brief description of the drawings]
1 is a cross-sectional view taken along the line AA in FIG. 2 and is a cross-sectional view showing the vicinity of a front end support portion of an impact beam.
FIG. 2 is an overall view of a door.
3 is a cross-sectional view taken along line BB in FIG.
FIG. 4 is a cross-sectional view showing the periphery of a front end support portion of an impact beam, showing another embodiment of the support structure.
FIG. 5 is a cross-sectional view around the front end support portion when applied to another type of impact beam.
[Explanation of symbols]
2 ... Outer panel, 3 ... Inner panel 4 ... Hinge, 5 ... Pillar 6 ... Hinge side panel 7 ... Hinge retainer 10 ... Impact beam (pipe type)
11 ... Impact beam (plate type)
20 ... 1st extension 21 ... 2nd extension, 21a ... Bending edge

Claims (2)

A structure for supporting an impact beam on the door front end surface via first and second extensions forming a closed sectional structure in plan view with the door front end surface,
An impact beam support structure for an automobile door, wherein the cross-sectional structure closed in a plan view has a substantially triangular shape, and each side of the substantially triangular shape is coupled to each other at a position corresponding to a triangular corner . A structure for supporting an impact beam on the door front end surface via first and second extensions forming a closed sectional structure in plan view with the door front end surface,
Said second extension forms a flat substantially U-shaped folded shape,該折return part is sandwiched between the door front face and the hinge retainer, the second by utilizing the mounting of the hinge by the hinge retainer An impact beam supporting structure for an automobile door, wherein an extension of the door is coupled to the front end face of the door.

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