JP2008013139A - Door beam support structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce local concentration of an impact load to a door, and to effectively transmit the impact load to a vehicle body side in a side collision even for the door of a center-pillarless form. <P>SOLUTION: In a door beam support structure, a door opening part formed on the side surface of the vehicle body is opened/closed by the door formed to be a hollow cross section by a door panel, and the door beam is stretched in the longitudinal direction as a reinforcing member in the door. Since the end part of the door beam 1 is supported by the box shaped cross section structures 2, 3 provided on the inner side of the vehicle body than the end part of the door beam 1 bonded to the door panel, and the box shaped cross section structures 2, 3 and the door beam 1 are overlapped in the side view, an occupant is effectively protected from the deformation of the door in the side collision by the door beam member, and the local concentration of the impact load is suppressed while improving the strength of the support part of the end part of the door beam member by being backed up in strength through the existence of the box shape cross section structures 2, 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a door beam support structure in which a door opening portion formed on a side surface of a vehicle body is opened and closed by a door having a hollow cross section formed by a door panel, and a door beam is provided in the door as a reinforcing member in the front-rear direction.

In vehicles such as automobiles, many effective shock absorbing means for frontal collision and rearward collision have been proposed and adopted. In recent years, various safety techniques have been developed against side collisions. In particular, in the case of a side collision, it is an important issue to consider how to reduce the risk of injury to the passenger, that is, the injury value, due to the door located on the side of the vehicle entering the vehicle interior. For that purpose, the impact of the door itself is effectively absorbed, and even when a large side load is applied that the door itself cannot absorb the impact, the door does not penetrate into the passenger compartment in a delusion. It was necessary to arrange a deterrent means. Accordingly, the present applicant has proposed a catcher mounting support structure that can effectively absorb side collision energy between a wheel arch portion on the vehicle body side of a general door and a corresponding portion of the door (for example, the following patent) Reference 1).
Japanese Patent Laid-Open No. 2001-277854 (refer to Claim 1).

  The catcher mounting support structure for a vehicle door disclosed in Patent Document 1 will be briefly described with reference to FIG. In the cross section of the rear wheel arch portion 25, a reinforcement having a box-shaped cross section composed of a reinforcement front 61 and a reinforcement rear 62 is attached, and both ends of the cylindrical member 27 are fixed between the reinforcements 61 and 62. These reinforcements 61 and 62 and the tubular member 27 constitute an attachment support portion, and the catcher 28 is attached to the tubular member 27 by screwing and tightening the attachment bolt 29.

  With this configuration, at the time of a side collision, the door 21 is deformed into the vehicle interior by an impact load, and the catcher 28 and the cylinder are connected via the striker portion 81 engaged in the engagement groove 41 of the hook 24 in the door 21. The member 27 collapses integrally, and the reinforcements 61 and 62 are crushed and deformed into parallelograms, so that the collision energy is effectively absorbed and reduced. However, the proposed catcher mounting support structure is a structure for the rear wheel arch portion 25 in the rear door or the like, that is, a vehicle door in which a rear pillar exists, and is a front door in which a slide door or the like is disposed at the rear. Thus, it has not been suitable for a pillarless type in which a center pillar is not provided between the front door and the rear door in order to employ a wide opening as in recent years.

  Therefore, the present invention further improves the above-mentioned proposal, and can reduce the local concentration of the impact load on the door and effectively transmit it to the vehicle body side even in the case of a center pillarless type door. An object of the present invention is to provide a door beam support structure.

  For this reason, the present invention is a door beam support structure in which a door opening portion formed on a side surface of a vehicle body is opened and closed by a door formed in a hollow cross section by a door panel, and a door beam is provided in the door as a reinforcing member in the front-rear direction. The door beam end portion is supported by a box-shaped cross-sectional structure provided inside the vehicle body from the door beam end portion joined to the door panel, and the box-shaped cross-sectional structure and the door beam are overlapped in a side view. It is characterized by that. Further, the present invention provides a separator member that forms a box-shaped cross section in a side view in cooperation with the door panel in the box-shaped cross-sectional structure, and overlaps the separator member and the door beam in a side view. A catcher member or a door catcher receiving member that engages with the door catcher member is provided in the separator, and the door catcher receiving member or the door catcher member is provided in the vehicle body. Further, the present invention is characterized in that the door beam support structure is disposed at a rear portion of a front door of a vehicle body having no center pillar between the front door and the rear door. This means.

  According to the present invention, in the door beam support structure in which the door opening portion formed on the side surface of the vehicle body is opened and closed by the door formed in the hollow cross section by the door panel, and the door beam is provided in the door as a reinforcing member in the front-rear direction. The door beam end portion is supported by a box-shaped cross-sectional structure provided inside the vehicle body from the door beam end portion joined to the door panel, and the box-shaped cross-sectional structure and the door beam are overlapped in a side view. Thus, the door beam member effectively protects the passenger from the deformation of the door at the time of a side collision, and is supported by the presence of the box-shaped cross-sectional structure provided inside the vehicle body to support the end of the door beam member. While improving the strength of the part, the local concentration of the impact load is suppressed, so that the entrance of the door into the passenger compartment and the impact load are effective. Osamu is possible.

  In addition, a separator member that forms a box-shaped cross section in a side view in cooperation with the door panel is provided in the box-shaped cross-sectional structure, and the separator member and the door beam overlap in a side view, and a door catcher member or When a door catcher receiving member that engages with the door catcher member is provided in the separator and the door catcher receiving member or the door catcher member is provided in the vehicle body, the strength of the box-shaped cross-sectional structure itself is improved by the installation of the separator member. As a result, the support strength of the door beam member is improved, and when a larger impact load is applied and the end of the door beam member is deformed, the end of the door beam member abuts on the separator member, and the impact load is further dispersed, resulting in local concentration. Not only makes it possible to absorb impact loads effectively, The larger impact load transmitted from the end of the ABeam member exhibits an appropriate impact resistance performance with high strength support by the box-shaped cross-sectional structure, and is effectively dispersed and distributed by one bracket member or separator member. Since it is absorbed and transferred to the vehicle body via the catcher member, it is transmitted to the vehicle body, so that the door can be effectively prevented from entering the vehicle interior by reliable backup. Moreover, since the impact load is also distributed to the catcher member, it is avoided that the load is borne only by the door latch, and the intrusion of the door into the vehicle interior due to exceeding the allowable tensile load of the door latch is further effectively suppressed. .

  Further, the door beam support structure does not have a center pillar between the front door and the rear door when the door beam support structure is disposed at the rear of the front door of the vehicle body that does not have the center pillar between the front door and the rear door. Even when the rear part of the front door of the vehicle body is closed with respect to the front part of the pillarless sliding door and the effective catcher member does not function, the end of the door beam member provided in the front door is supported with high strength, and the separator The reinforcement effect by the members and the sharing of the separator member and one bracket member enables the impact resistance performance of the impact load to be maintained and distributed, and the impact load to the vehicle body can be transferred and transmitted via the separator member. So, it compensates for the disadvantages of pillarless, and the door is deformed with a relatively small collision load by reinforcing the corner of the door. It is no, even if a large impact load, pass-transmission to the dispersion and the vehicle body load is effectively controlled, injury criterion for the occupant is reduced.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an essential part of one embodiment of a door beam support structure of the present invention, FIG. 2 is a longitudinal sectional view of a plane including a catcher member, and FIG. 3 is an open view including the door beam support structure of the present invention. It is a side perspective view of a vehicle including a door in a state. As shown in FIG. 1, the basic structure of the door beam support structure according to the present invention is to open and close a door opening portion formed on the side surface of a vehicle body by a door having a hollow cross section formed by a door panel. In the door beam support structure in which 1 is provided in the front-rear direction, the end portion of the door beam 1 is supported by box-shaped cross-sectional structures 2 and 3 provided on the inner side of the vehicle body from the end portion of the door beam joined to the door panel. The box-shaped cross-sectional structures 2 and 3 and the door beam 1 are overlapped in a side view.

  The embodiment shown in FIG. 1 is a side perspective view of a vehicle including a door in an opened state, and there is no center pillar as shown in FIG. It is an example of the door beam support structure given to the rear part of the front door with respect to the sliding door front part. Therefore, when the rear portion of the front door is closed with respect to the front portion of the slide door, there is essentially no pillar on the vehicle body side that can effectively function the door latch member or the catcher member. In addition, the present invention can also be applied to a combination of double doors such as a kannon door. Further, the present invention relates to a door beam support structure in which a door beam member 1 is provided in the door in the front-rear direction. However, application of the door beam support structure of the present invention to a door having a center pillar on the vehicle body side is not excluded.

  As shown in FIG. 1, the reinforcement 11 that defines the frame shape of the rear part of the door extends to the upper side (not shown). For example, a round pipe-shaped door beam member 1 is provided in the front-rear direction inside the front door. Usually, a pair of two upper and lower parts are provided, but the illustration shows a support part at the rear end of only the lower door beam member 1. The rear end portion of the door beam member 1 is supported by a box-shaped cross-sectional structure formed by crossing substantially L-shaped cross-section bracket members 2 and 3. The box-shaped cross-sectional structure is formed by crossing a support bracket member 2 indicated by a thick dotted line and a bracket member 3 indicated by a thin dotted line.

  Each of the pair of bracket members 2 and 3 is constituted by a substantially L-shaped cross section, and the bracket member 3 with respect to the horizontal portion 2A of the support bracket member 2 that supports the rear end portion of the door beam member 1 connected in a holding shape. The horizontal portion 3A is joined. A joining bracket 3C which is bent in the vehicle body outer side direction of the vertical bracket 3B of the bracket member 3 is joined to the vertical portion 2B of the support bracket member 2. In the illustrated example, as described above, the cross-arrangement of the pair of substantially L-shaped cross-section bracket members 2 and 3 ensures a minimum box-shaped cross section of at least three sides, and is a lightweight and simple reinforcing structure. Is realized. As the box-shaped cross-sectional structure, for example, a cross-sectional arrangement of bracket members having a hat-shaped cross section can be used to form a structure having five surfaces.

  In the box-shaped cross-sectional structure composed of the support bracket member 2 and the bracket member 3, for example, a separator member 4 having a hat-shaped cross section is installed as indicated by a thick solid line. As shown in the longitudinal sectional view of FIG. 2, the horizontal portion 4A at the top of the separator member 4 is disposed with a gap between the separator 11 and extends horizontally from the lower ends of both ends of the vertical legs 4B and 4B. The horizontal portions 4D and 4D are attached and joined to the door inner bottom plate 10. The upper end portion of the catcher member 5 is fastened and fixed by a fastening nut 8 to the mounting hole 12 formed in one horizontal portion 4D. The separator member 4 and the rear end portion of the door beam member 1 are not connected to each other and are overlapped in a side view.

  Further, the bracket member 3 and the door beam member 1 which are not the support bracket member 2 which holds at least one of the pair of bracket members constituting the box-shaped cross-sectional structure, preferably the rear end portion of the door beam member 1. The rear end portion is overlapped in a side view. With these configurations, the strength of the box-shaped cross-section structure itself is improved by the installation of the separator member 4 and the support strength of the door beam member 1 is improved, and the end portion of the door beam member 1 is deformed by applying a larger impact load. In this case, the end of the door beam member 1 abuts against the separator member 4 to further disperse the impact load, and the local concentration is relaxed, so that the impact load can be effectively absorbed. In addition, when a large impact load is applied and the rear end portion of the door beam member 1 is deformed, one bracket that is a component of a box-shaped cross-section structure that reliably holds the rear end portion of the door beam member 1 with high strength. The end portion of the door beam member 1 also comes into contact with the member 3 to disperse the impact load, and the local concentration is relaxed, so that the impact load can be effectively absorbed.

  As shown in FIG. 2, the separator member 4 is provided with a catcher member 5 that enables engagement with the vehicle body 6 when the separator member 4 is deformed and moved. That is, the catcher member 5 inserted into the mounting hole 12 of the separator member 4 and fastened together with the door inner bottom plate 10 is inserted into the locking groove 13 of the catcher receiving member 7 installed on the vehicle body 6 side when the front door is closed. It arrange | positions so that it may face. By being configured in this way, a larger impact load transmitted from the end of the door beam member 1 shows an appropriate impact resistance performance by high strength support by the box-shaped cross-section structure, When the deformation further proceeds after being effectively dispersed and absorbed by the bracket member 3 and the separator member 4, the impact load is transferred to the vehicle body 6 via the catcher member 5 installed on the separator member 4 and transmitted. The door 6 can be effectively prevented from entering the vehicle compartment by the reliable backup of the vehicle body 6.

  Further, as shown in FIG. 2, a door latch member 9 is disposed at a position different from the catcher member 5, and is engaged with a striker (not shown) installed on the vehicle body 6 side when the door is closed. Since the impact load is also distributed to the catcher member 5, it is avoided that the load is only borne by the door latch member 9, and the door can be more effectively intruded by exceeding the allowable tensile load of the door latch member 9. To be suppressed.

  Further, as shown in FIG. 1, the vertical portion 2B of the support bracket member 2 constituting the box-shaped cross-sectional structure and the reinforcement 11 are joined. As a result, the impact load transmitted from the end of the door beam member 1 can be transferred from the box-shaped cross-sectional structure to the reinforcement 11 constituting the door frame via the support bracket member 2, so that the impact can be further increased. By avoiding local concentration of the load and transmitting it to the upper part of the door, it is possible to more effectively disperse and absorb the impact.

  The door beam support structure of the present invention is preferably disposed at the rear portion of the front door with respect to the front portion of the center pillarless sliding door. As a result, when the rear part of the front door is closed with respect to the front part of the slide door, the pillar member such as the wheel house is not provided on the vehicle body side, and even if the originally effective catcher member does not function, Maintaining and dispersing the impact resistance performance of the impact load by supporting the end portion of the door beam member 1 provided with high strength, the reinforcing effect of the separator member 4, and the sharing of the separator member 4 and one bracket member 3, Since it is possible to pass and transmit the impact load to the vehicle body 6 via the separator member 4, it compensates for the disadvantage of pillarless, and the door is not deformed by a relatively small collision load due to reinforcement of the corner of the door. Even in the case of a large impact load, the distribution of the load and the pass-through / transmission to the vehicle body are effectively controlled, and the injury value to the occupant decreases.

  Although the embodiments of the present invention have been described above, the shape of the door beam member (round pipe shape, square pipe shape, H-shaped cross section, etc.), type, box-shaped cross-section structure within the scope of the present invention. Support bracket member and the shape of the bracket member (both cross-sectional shapes are substantially L-shaped, hat-shaped, or a combination of a substantially L-shaped and a hat-shaped shape, etc.), type, and support form of the door beam member end (Holding form, the end of the door beam member may be cut according to the joining angle of the door beam member to the support bracket member, and joined around the entire circumference), the shape of the separator member (hat shape, closed cross section The mounting horizontal part is extended from the main body part, etc.), the form, and the installation form of the separator member in the box-shaped cross-section structure (the upper surface of the separator member may be joined to the upper surface of the reinforcement) Side view overlap form (overlap amount, etc.) between at least one of the separator member and the bracket member and the end of the door beam member, the shape and form of the catcher member, and the form of load transmission to the vehicle body, the shape and form of the door latch member, and The installation form on the door, the joint form between the box-shaped cross-sectional structure and the reinforcement, the type of door on which the door beam support structure is disposed, and the like can be selected as appropriate.

It is a principal part perspective view which shows one Example of the door beam support structure of this invention. It is a longitudinal cross-sectional view in the surface containing a catcher member. 1 is a side perspective view of a vehicle including an opened door having a door beam support structure of the present invention. It is explanatory drawing of the catcher attachment support structure of the conventional vehicle door.

Explanation of symbols

1 Door beam member 2 Box-shaped cross-section structure (support bracket member)
2A Horizontal part 2B Vertical part 3 Box-shaped cross-section structure (bracket member)
3A Horizontal portion 3B Vertical portion 3C Joint portion 3D Lower horizontal portion 4 Separator member 4A Horizontal portion 4B Vertical leg portion 4D Mounting horizontal portion 5 Catcher member 6 Car body 11 Reinforce 12 Mounting hole

Claims (3)

In a door beam support structure in which a door opening portion formed on a side surface of a vehicle body is opened and closed with a door formed in a hollow cross section by a door panel, and a door beam is provided in the door as a reinforcing member in the front-rear direction. The door beam is supported by a box-shaped cross-sectional structure provided inside the vehicle body from an end of the door beam joined to the door panel, and the box-shaped cross-sectional structure and the door beam overlap in a side view. Support structure. A separator member that forms a box-shaped cross section in a side view in cooperation with the door panel is provided in the box-shaped cross-sectional structure, and the separator member and the door beam overlap in a side view, and a door catcher member or the door 2. The door beam support structure according to claim 1, wherein a door catcher receiving member that engages with the catcher member is provided on the separator, and the door catcher receiving member or the door catcher member is provided on the vehicle body. The door beam support structure according to claim 1 or 2, wherein the door beam support structure is disposed at a rear portion of a front door of a vehicle body having no center pillar between the front door and the rear door.

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