JP2005161889A - Connecting structure for rear portion of car body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the stiffness of a rear portion of a car body against the stress applied from various directions by integratedly and rigidly combining respective members with a simple structure, wherein the respective members gather to the corner portion of a rear pillar of a rear portion of the car body, a roof on the car body, and a periphery of a door aperture opened in the rear wall of the car body. <P>SOLUTION: At the corner portion of the rear pillar 1 of the rear portion of the car body, the roof 4, and the periphery of the rear gate aperture 7, a rigid coupling structure is formed by integratedly combining a coupling structure of the rear pillar 1 and a side rail 3 with a coupling structure at the periphery of the rear gate aperture 7 by a D pillar 1b and a rear rail 5, with a simple structure using only a four arm rear pillar patch 6. By this configuration, the stiffness of the rear portion of the car body against the forces applied from various directions can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coupling structure of a rear part of a vehicle body that couples a corner portion of a rear pillar at the rear part of the vehicle body, a roof at the upper part of the vehicle body, and a door opening peripheral edge opened in the rear wall of the vehicle body.

  In general, in an automobile having a back door, an opening side edge of the back door is formed by a rear pillar at the rear of the vehicle body, and a hinge that is disposed along the rear end edge of the roof and pivotally supports the back door is attached. The upper edge of the opening of the back door is formed by the rear rail provided with the hinge mounting portion.

For example, in Patent Document 1, an extension portion joined to the left and right end portions of the roof from the left and right end portions of the reinforcement attached to the roof rail (the above-described rear rail) provided between the left and right rear pillar inners is formed. By inserting the cut and raised formed at the tip of the extension into the slit formed at the corresponding end of the rear pillar outer, the roof and roof reinforcement can be positioned accurately and easily in the left-right direction. Techniques for forming the are disclosed.
JP-A-9-86440

  However, the connecting portion between the rear rail and the re-pillar is a corner portion where side rails connected to the side edge of the roof and extending in the longitudinal direction of the vehicle body gather. The corner portion includes a vertical direction and a horizontal direction of the vehicle body. Stress from each direction including the twist direction acts. For this reason, even if the members gathered at the corner portion are individually reinforced and joined, the configuration is only complicated, and it is difficult to effectively increase the rigidity against stress from each direction.

  The present invention has been made in view of the above circumstances, and the members gathered at the corners of the rear pillar at the rear of the vehicle body, the roof at the top of the vehicle body, and the door opening periphery opened at the rear wall of the vehicle body are integrated with a simple configuration. An object of the present invention is to provide a coupling structure for a rear portion of a vehicle body that can be firmly coupled and can increase rigidity against stress acting from each direction.

  In order to achieve the above object, the vehicle body rear part coupling structure according to the present invention is a vehicle body rear part coupling structure that couples the corners of the rear pillar at the rear of the vehicle body, the roof at the upper part of the vehicle body, and the door opening periphery opened at the rear wall of the vehicle body. The rear rail disposed at the upper edge of the door opening and the rear pillar are coupled to the corner portion, the side rail coupled to the side edge of the roof and extending in the longitudinal direction of the vehicle body, and the A reinforcing member is provided for connecting the rear rail, and further connecting the inner member below the roof and the rear rail by forming a closed cross section.

  The vehicle body rear part coupling structure according to the present invention is formed by integrating the members assembled at the corners of the rear pillar at the rear part of the vehicle body, the roof at the upper part of the vehicle body, and the door opening peripheral edge opened at the rear wall of the vehicle body with a simple structure and firmly coupled. It is possible to increase the rigidity against stress acting from each direction.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 relate to an embodiment of the present invention, FIG. 1 is a perspective view of a rear part of a vehicle body, FIG. 2 is an enlarged view of a corner part of the rear part of the vehicle body, and FIG. 3 is a sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along line BB in FIG.

  FIG. 1 is a perspective view of a rear part of a vehicle such as an automobile as viewed from the upper left side (passenger seat side), where an arrow Fr is a front side of the vehicle, Rr is a rear side of the vehicle, and R is a right side (driver's seat side). ), L indicates the left side (passenger seat side). In the figure, reference numeral 1 denotes a rear pillar, and a lamp housing 2 for accommodating a tail lamp is formed at the upper part on the rear side of the rear pillar 1. In this embodiment, the rear pillar 1 has a configuration in which a front C pillar 1a and a rear D pillar 1b are coupled together at the top.

  Further, a side rail 3 extending in the longitudinal direction of the vehicle body is coupled to the upper portion of the rear pillar 1, and a roof 4 at the upper portion of the vehicle body is coupled to the side rail 3. A rear rail 5 extending in the vehicle width direction is disposed on the rear end side of the roof 4, and the rear rail 5 is coupled to the rear pillar 1 and the side rail 3 via a rear pillar patch 6. A rear gate opening 7 serving as a door opening of a back door (not shown) is formed by the rear rail 5 and the left and right D pillars 1b.

  The rear pillar patch 6 is a four-membered member that joins the C pillar 1a, the D pillar 1b, the side rail 3, and the rear rail 5. As shown in the enlarged view of FIG. 2, the D pillar 1b and the rear rail 5 are mainly connected. A corner coupling portion 6a to be coupled, a side coupling portion 6b that couples the side rail 3 and the roof 4 in front of the corner coupling portion 6a, and a tongue-like extension extending from the side coupling portion 6b. A tip coupling portion 6c for coupling the inner member is provided. Further, a flange portion 6d that is coupled to the rear pillar 1 side is provided from the corner coupling portion 6a to the side coupling portion 6b.

  Specifically, the end portion of the rear rail 5 and the end portion of the D pillar 1b are fitted to the corner joint portion 6a of the rear pillar patch 6 and joined by spot welding or the like, and as shown in the sectional view of FIG. The rear pillar 1 and the side panel outer 8 constituting the outer shell of the side rail 3 and the roof panel 4a forming the outer member of the roof 4 form a groove shape on the rear side of the groove bottom portion of the roof drip 9, which is superposed on the rear pillar. Side coupling portions 6b of the patch 6 are joined by spot welding or the like. Thereby, the D pillar 1b and the rear rail 5 are firmly coupled, and a firm coupling structure with the side rail 3 side is formed.

  Further, as shown in the cross-sectional view of FIG. 4, the front end coupling portion 6 c of the rear pillar patch 6 is joined to the quarter panel inner 10 serving as an inner member from the side rail 3 to the roof 4 by spot welding or the like. As a result, a closed section D is formed from the joint portion of the tip joint portion 6c with the quarter panel inner 10 to the joint portion of the corner joint portion 6a with the rear rail 5.

  That is, with a simple configuration using only the four-pillar structure of the rear pillar patch 6, the coupling structure of the rear pillar 1 and the side rail 3 and the D pillar 1b at the corner of the rear pillar 1, roof 4, and rear gate opening 7 at the rear of the vehicle body. In addition, it is possible to form a strong joint structure in which the joint structure of the rear gate opening 7 and the periphery of the rear gate 5 is integrated.

  Thereby, the rigidity in the vertical direction of the vehicle body and the longitudinal direction and the rigidity against the torsional stress can be secured, and in particular, since the closed section D is formed in the joint portion from the quarter panel inner 10 to the rear rail 5, the corner portion The rigidity against stress acting from each direction can be greatly increased.

Perspective view of the rear of the body Enlarged view of the corner at the rear of the car body AA line sectional view of FIG. BB sectional view of FIG.

Explanation of symbols

1 Rear Pillar 1a C Pillar 1b D Pillar 3 Side Rail 4 Roof 4a Roof Panel 5 Rear Rail 6 Rear Pillar Patch 7 Rear Gate Opening 9 Roof Drip
Agent Patent Attorney Susumu Ito

Claims (3)

A vehicle body rear coupling structure that couples the corners of the rear pillar at the rear of the vehicle body, the roof at the top of the vehicle body, and the door opening periphery that opens in the rear wall of the vehicle body,
A rear rail disposed on the upper edge of the door opening and the rear pillar are coupled to the corner portion, and a side rail coupled to the side edge of the roof and extending in the longitudinal direction of the vehicle body and the rear rail. And a reinforcing member for connecting the inner member below the roof and the rear rail so as to form a closed cross section. The rear pillar is composed of two pillars, front and rear, joined at the top,
2. The vehicle body rear portion coupling structure according to claim 1, wherein the reinforcing member is a four-membered member that couples the rear rail, the two pillars, and the side rail.   2. The side rail and the rear rail are coupled to each other via a roof drip in which a groove shape is formed in a vehicle longitudinal direction by superposing the outer member of the side rail and the outer member of the roof. Or the coupling | bonding structure of the vehicle body rear part of 2 description.

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