JP5176669B2 - Vehicle roof structure - Google Patents

Description

  The present invention relates to a vehicle roof structure.

A vehicle roof device in which a guide rail is arranged along a side edge of an opening provided in a vehicle roof, and a frame (reinforcing member) positioned behind the opening and extending in the vehicle width direction is fixed to the guide rail. Discloses a structure in which a frame is formed by stacking a plurality of plates, the uppermost plate and the guide rail are fastened by caulking, and the plate is bolted to a bracket fixed to the side of the opening. (See Patent Document 1).
JP 2002-327250 A

  However, in the above-described conventional example, emphasis is placed on enabling the caulking connection between the guide rail and the frame, and the bending stress generated in the frame of the vehicle roof at the time of a side collision is not sufficiently considered.

  In consideration of the above facts, the present invention can adjust the bending stress generated in the reinforcing member of the vehicle roof at the time of a side collision by setting the shape of the load transmitting member provided between the reinforcing member and the roof side rail. The purpose is to make it possible to share a reinforcing member between different vehicle types.

According to the first aspect of the present invention, a roof side rail extending in the vehicle front-rear direction on both sides in the vehicle width direction at the upper part of the vehicle, a vehicle roof, and extending in the vehicle width direction between the roof side rails on both sides. A reinforcing member provided with load receiving portions at both ends, and the roof side rail and the reinforcing member so as to connect the roof side rail and the reinforcing member, and the vehicle is connected to the reinforcing member by the connecting portion with the reinforcing member. A load transmission end that is close to and opposed to the load receiving portion in the vehicle width direction is provided below, and a portion corresponding to the coupling portion and a portion corresponding to the load transmission end have a double structure in which a reinforcing plate is joined. the bending stress generated in the reinforcing member during a side collision, anda load transfer member is adjustable by the height setting of the load transmission end relative to the said coupling part, wherein the load transmitting end, the There is a closed cross section having a gap between the reinforcing plate and heavy transmission member.

  In the vehicle roof structure according to claim 1, a roof side rail extending in the vehicle front-rear direction and a reinforcing member extending in the vehicle width direction between the roof side rails are coupled by a load transmission member. The side impact load input to the side of the vehicle at the time of a side collision is transmitted from the roof side rail to the reinforcing member via the load transmitting member. At this time, the transmission of the side impact load from the load transmitting member to the reinforcing member is performed via two paths. A 1st path | route is a path | route through the coupling | bond part of a load transmission member and a reinforcement member. A 2nd path | route is a path | route formed when the load transmission end of a load transmission member contact | abuts to the load receiving part of a reinforcement member.

Since the load transmitting end of the load transmitting member is in close proximity to the load receiving portion of the reinforcing member below the coupling portion between the load transmitting member and the reinforcing member, a side impact load is applied from the load transmitting end to the load receiving portion. By being transmitted, a bending moment centered around the coupling portion is input to the reinforcing member. As a result, bending stress is generated in the reinforcing member, but in the load transmission member, this bending stress can be adjusted according to the vehicle type by setting the height of the load transmission end with reference to the coupling portion. For this reason, a reinforcement member can be shared between different vehicle types.
Furthermore, among the load transmission members, the portion corresponding to the coupling portion with the reinforcing member and the portion corresponding to the load transmission end have a double structure in which the reinforcing plate is joined, and the load transmission end is the load transmission end. Since it has a closed cross-sectional structure having a gap between the member and the reinforcing plate, deformation of the load transmitting member can be suppressed when a side impact load is transmitted from the load transmitting member to the reinforcing member. For this reason, a side impact load can be efficiently transmitted from the load transmitting member to the reinforcing member.

  According to a second aspect of the present invention, in the vehicle roof structure according to the first aspect, the reinforcing member is a center frame disposed so as to straddle a roof opening formed in the vehicle roof.

  In the vehicle roof structure according to claim 2, the reinforcing member is a center frame disposed so as to straddle a roof opening formed in the vehicle roof, and bending stress generated in the center frame at the time of a side collision is applied to the load. It can be adjusted by setting the shape of the transmission member. For this reason, a center frame such as a sunroof can be shared between different vehicle types.

  As described above, according to the vehicle roof structure of the first aspect of the present invention, the shape of the load transmitting member provided between the reinforcing member and the roof side rail is set, so that the vehicle roof An excellent effect is obtained in that the bending stress generated in the reinforcing member can be adjusted so that the reinforcing member can be shared between different vehicle types.

  According to the vehicle roof structure of the second aspect, it is possible to obtain an excellent effect that a center frame such as a sunroof can be shared between different vehicle types.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a vehicle roof structure S according to the present embodiment includes a roof side rail 10, a center frame 12 that is an example of a reinforcing member, and a load transmission member 14.

  In FIG. 2, the roof side rail 10 extends in the vehicle front-rear direction on both sides in the vehicle width direction at the upper part of the vehicle, and for example, the roof side rail 10 is configured by joining a roof side rail outer 16 and a roof side rail inner 18. It is a skeleton member. The roof side rail outer 16 and the roof side rail inner 18 are joined at, for example, a first joint 21 on the upper side of the vehicle and a second joint 22 on the lower side of the vehicle to form a closed cross section.

  The roof side rail 10 is covered with, for example, an outer panel 24 connected to a center pillar (not shown), and the outer panel 24 is joined to the vehicle roof 26 and the roof side rail 10 at the first joint portion 21. The first joint portion 21 is located in a so-called mohawk groove portion 28 that extends in the vehicle front-rear direction at the boundary between the vehicle roof 26 and the outer panel 24.

  In FIG. 1, the center frame 12 is a reinforcing member provided on the vehicle roof 26, extending in the vehicle width direction between the roof side rails 10 on both sides, and provided with load receiving portions 12A (FIG. 2) at both ends. Yes, it is arranged so as to straddle the roof opening 30 formed in the vehicle roof 26. That is, the vehicle roof 26 in the present embodiment is provided with, for example, a sunroof.

  2 and 3, the center frame 12 is configured by, for example, overlapping and joining two steel plates in the vehicle vertical direction. The general portion 12B of the center frame 12 is formed in, for example, a reverse hat shape in cross section. At both ends of the general portion 12B, there are provided load receiving portions 12A which are bent to the upper side of the vehicle and formed in a vertical wall shape. Further, an upper flange 12C and a lower flange 12D are formed at the upper end of the load receiving portion 12A. The lower flange 12D is provided between the front and rear upper flanges 12C. That is, the upper flange 12C and the lower flange 12D as a whole are formed, for example, in a cross-hat shape.

  Load transmission members 14 are respectively coupled to the lower surfaces of the front and rear upper flanges 12C. The front and rear upper flanges 12C are fastened and fixed to the load transmission members 14 using, for example, bolts 32 and nuts (not shown). Has been. As shown in FIG. 2, a sunroof guide rail 34 is fixed to the vehicle upper side of the general portion 12B of the center frame 12 by, for example, caulking. The guide rails 34 extend in the vehicle longitudinal direction on both sides in the vehicle width direction.

  2 and 3, the load transmission member 14 is coupled to the roof side rail 10 and the center frame 12 so as to connect the roof side rail 10 and the center frame 12, and a coupling portion 40 with the center frame 12. A load transmitting end 42 that is close to the load receiving portion 12A in the vehicle width direction is provided at the lower side of the vehicle, and the bending stress generated in the center frame 12 at the time of a side collision is determined by the height of the load transmitting end 42 with respect to the coupling portion 40. It is configured to be adjustable by setting. The load transmission member 14 is configured by press forming a steel plate, for example.

  In FIG. 4, the load transmission member 14 has a pair of coupling portions 40 that are separated in the vehicle longitudinal direction. The coupling portion 40 is configured, for example, in a planar shape, and is provided with through holes 14B through which the bolts 32 (FIG. 3) are passed. As shown in FIG. 3, the load transmitting member 14 is coupled to the lower surface of the front and rear upper flanges 12 </ b> C of the center frame 12 using bolts 32 and nuts (not shown) at the coupling portion 40. .

  14 C of inclined surfaces extended diagonally below on the vehicle width direction outer side are provided in the edge of the vehicle width direction outer side of the front-back coupling part 40, respectively. The inclined surface 14C is provided with through holes 14D for passing bolts (not shown). As shown in FIG. 2, the load transmitting member 14 is fastened and fixed to the roof side rail inner 18 of the roof side rail 10 on the inclined surface 14 </ b> C. 6 and 7A, side wall portions 14M extending downward in the vehicle are provided at the inner edges in the vehicle width direction of the front and rear coupling portions 40, respectively.

  In FIG. 4, side wall portions 14 </ b> E extending to the vehicle lower side are respectively provided at the front edge of the vehicle front side coupling portion 40 and the rear edge of the vehicle rear side coupling portion 40. On the other hand, as shown in FIGS. 4 and 6, an inclined surface 14 </ b> F extending to the vehicle rear side and the vehicle lower side is provided on the rear edge of the coupling portion 40 on the vehicle front side. Similarly, an inclined surface 14 </ b> F extending to the vehicle front side and the vehicle lower side is also provided at the front edge of the coupling portion 40 on the vehicle rear side. The lower edges of the front and rear inclined surfaces 14F are connected by a bottom surface portion 14G extending in the vehicle front-rear direction. As shown in FIGS. 4 and 5, the load transmission end 42 is an edge of the bottom surface portion 14 </ b> G on the inner side in the vehicle width direction.

  In FIG. 4, the side wall portion 14E on the vehicle front side is continuous with the front edge of the inclined surface 14C on the vehicle front side, and the side wall portion 14E on the vehicle rear side is connected with the rear edge of the inclined surface 14C on the vehicle rear side. Side wall portions 14H extending to the vehicle lower side are provided on the rear edge of the inclined surface 14C on the vehicle front side and on the front edge of the inclined surface 14C on the vehicle rear side, respectively. Flange portions 14J projecting in the vehicle front-rear direction are provided on the lower edges of the side wall portions 14E and 14H, respectively. That is, the region from the coupling portion 40 to the inclined surface 14C in the load transmission member 14 is configured to have a cross-sectional hat shape.

  As shown in FIG. 3, a curtain shield airbag 36 is arranged along the longitudinal direction of the roof side rail 10 (FIG. 2) below the load transmission member 14 in the vehicle. For example, an arcuate recess 14K is formed in a part of the flange portion 14J so as to avoid the curtain shield airbag 36 when viewed from the vehicle front-rear direction. A semi-cylindrical portion 14L corresponding to the concave portion 14K is provided between the front and rear coupling portions 40. An end edge of the semi-cylindrical portion 14L on the inner side in the vehicle width direction is continuous with the bottom surface portion 14G.

  4 and 5, the portion of the load transmitting member 14 corresponding to the coupling portion 40 with the center frame 12 and the portion corresponding to the load transmitting end 42 have a double structure in which a reinforcing plate 38 is joined. ing. The reinforcing plate 38 is formed by press-molding a steel plate, for example, and has a pair of upper step portions 38A that are spaced apart in the vehicle front-rear direction corresponding to the coupling portion 40 of the load transmitting member 14. The upper step portion 38A is configured in a planar shape, for example, and is provided with through holes 38B through which the bolts 32 (FIG. 3) are passed. An extension 38C is formed on the upper step 38A so as to protrude outward in the vehicle width direction.

  Further, side edges 38D and 38E having an L-shaped cross section in a plan view of the vehicle are provided on the front edge of the upper step portion 38A on the vehicle front side and the end edge on the inner side in the vehicle width direction. Similarly, side edges 38D and 38E having an L-shaped cross section when viewed from the top of the vehicle are also provided at the rear edge of the upper rear portion 38A of the vehicle rear side and the end edge on the inner side in the vehicle width direction, for example.

  An inclined surface 38F extending to the vehicle rear side and the vehicle lower side is provided at the rear edge of the upper stage portion 38A of the vehicle front side. Similarly, an inclined surface 38F that extends toward the vehicle front side and the vehicle lower side is also provided on the front edge of the upper step portion 38A on the vehicle rear side. The lower edges of the front and rear inclined surfaces 38F are connected by a lower step portion 38G extending in the vehicle front-rear direction. An end edge 38H on the inner side in the vehicle width direction of the lower step portion 38G is also a load transmission end to the center frame 12 (FIG. 2).

  The reinforcing plate 38 is joined to the lower surface of the load transmitting member 14 by spot welding, for example. Specifically, as shown in FIG. 7A, of the reinforcing plate 38, the extension portion 38C is joined to the lower surface of the coupling portion 40 in the load transmitting member 14 by, for example, spot welding, and the side wall portion 38D is formed. The inner surface (outer surface in the vehicle width direction) of the side wall portion 14M of the load transmission member 14 is joined by, for example, spot welding. As shown in FIG. 6, the side wall 38 </ b> E is close to or in contact with the inner surface (the inner side surface in the vehicle front-rear direction) of the side wall 14 </ b> E in the load transmission member 14.

  The bottom surface portion 14G of the load transmitting member 14 and the lower step portion 38G of the reinforcing plate 38 are joined by spot welding, for example, at the center thereof. In this state, as shown in FIGS. 6 and 7B, the bottom surface portion 14G of the load transmitting member 14 and the lower step portion 38G of the reinforcing plate 38 have a closed cross-sectional structure having a gap A therebetween. Yes. As shown in FIG. 6, the gap A is also provided between the inclined surface 14 </ b> F of the load transmitting member 14 and the inclined surface 38 </ b> F of the reinforcing plate 38. By providing the reinforcing plate 38 so that the gap A is formed, it is possible to secure a wide area in the vehicle vertical direction as a load transmission end to the center frame 12 while increasing the rigidity of the load transmission member 14. ing.

  In the load transmission member 14, the bending stress generated in the center frame 12 at the time of a side collision can be adjusted by setting the height of the load transmission end 42 with reference to the joint portion 40 between the center frame 12 and the load transmission member 14. It has become. This height setting corresponds to the depth setting of the bottom surface part 14G with the coupling part 40 as a reference. When the depth Z1 shown in FIG. 7B is compared with the depth Z2 shown in FIG. 8, Z1> Z2. As shown in FIG. 7 (B), by setting the depth Z1 to be relatively large, the bending stress generated in the center frame 12 at the time of a side collision can be increased, and as shown in FIG. By setting the length Z2 to be relatively small, the bending stress generated in the center frame 12 at the time of a side collision can be reduced.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 9, in the vehicle roof structure S according to the present embodiment, when a side collision load F is input to the side of the vehicle due to a side collision, the side collision load F is transferred from the roof side rail 10 to the center frame 12. It is transmitted via the load transmitting member 14. At this time, the side impact load F is transmitted from the load transmitting member 14 to the center frame 12 through two paths. The first path is a path through the connecting portion 40 between the load transmission member 14 and the center frame 12. The second path is a path formed by the load transmission member 14 and the edge 38H of the reinforcing plate 38 coming into contact with the load receiving portion 12A of the center frame 12.

  In the first path, since the coupling position between the roof side rail inner 18 of the roof side rail 10 and the inclined surface 14C of the load transmitting member 14 is located below the coupling portion 40, the roof side rail 10 As a result, the side impact load F is transmitted to the load transmitting member 14, whereby the bending moment M <b> 1 is input to the center frame 12 via the coupling portion 40. In the second path, the edge 38H of the load transmitting member 14 and the reinforcing plate 38 is in close proximity to the load receiving portion 12A of the center frame 12 below the connecting portion 40 between the load transmitting member 14 and the center frame 12. Therefore, when the side impact load F is transmitted from the load transmitting end 42 to the load receiving portion 12A, a bending moment M2 centered around the coupling portion 40 is input to the center frame 12.

  At this time, in the vehicle roof structure S according to this embodiment, the portion of the load transmission member 14 corresponding to the coupling portion 40 with the center frame 12 and the portion corresponding to the load transmission end 42 are the reinforcing plate 38. Since the bonded double structure is adopted, deformation of the load transmitting member 14 can be suppressed when the side impact load F is transmitted from the load transmitting member 14 to the center frame 12. In particular, as shown in FIG. 6, the bottom surface portion 14G of the load transmitting member 14 and the lower step portion 38G of the reinforcing plate 38 have a closed cross-sectional structure having a gap A therebetween. A region serving as a load transmission end to the center frame 12 can be secured widely in the vehicle vertical direction while increasing the rigidity. For this reason, the side impact load F can be efficiently transmitted from the load transmitting member 14 to the center frame 12.

  When the side impact load F is transmitted through the first path and the second path, a bending stress is generated in the center frame 12. In the present embodiment, this bending stress is applied to the connecting portion of the load transmitting member 14. By setting the height of the load transmitting end 42 with reference to 40, it can be adjusted according to the vehicle type. That is, since the magnitude of the bending moment M2 in FIG. 9 is proportional to the distance from the connecting portion 40 to the load transmitting end 42, the depth Z1 should be set relatively large as shown in FIG. 7B. Thus, the bending stress generated in the center frame 12 at the time of the side collision can be increased, and as shown in FIG. 8, the bending stress generated in the center frame 12 at the time of the side collision is set by setting the depth Z2 relatively small. Can be reduced.

  FIG. 10 schematically shows the deformation amount of the center frame 12 in the case of the depths Z1 and Z2 after a predetermined time has elapsed since the occurrence of the side collision. In the figure, the solid line indicates the case of depth Z1, and the two-dot chain line indicates the case of depth Z2. It can be seen that the amount of deformation is smaller in the case of the depth Z2 where the bending stress generated in the center frame 12 is relatively small (two-dot chain line) than in the case of the depth Z1 (solid line).

  In the present embodiment, since the stress generated in the center frame 12 at the time of a side collision can be adjusted by setting the shape of the load transmitting member 14, the center frame 12 such as a sunroof can be shared between different vehicle types. it can. For this reason, the manufacturing cost of the vehicle 20 can be suppressed.

  In the above embodiment, the center frame 12 is described as the reinforcing member. However, the reinforcing member is not limited to this, and a roof reinforcement (not shown) generally used for a vehicle roof that does not have the roof opening 30. It may be. Further, a part of the load transmission member 14 has a double structure by the reinforcing plate 38, but the structure is not limited to this, and the reinforcing plate 38 may not be used.

It is a perspective view which shows the vehicle which has a center frame in the roof opening part of a vehicle roof. FIG. 2 is an enlarged cross-sectional view taken along arrow 2-2 in FIG. 1 showing a vehicle roof structure. It is an expansion perspective view which shows the combined state of a center frame and a load transmission member. It is a disassembled perspective view which shows a load transmission member. It is a top view which shows a load transmission member. It is a front view which shows a load transmission member in the side view from the vehicle center side. (A) It is a 7A-7A arrow end surface figure in FIG. 6 which shows a load transmission member. (B) It is a 7B-7B arrow end surface figure in FIG. 6 which shows a load transmission member. FIG. 8 is a cross-sectional view taken along arrow 8-8 in FIG. 6, showing a load transmitting member in which the height position of the load transmitting end is set to be relatively high. In a cross-sectional position corresponding to FIG. 2, a side collision load is transmitted from the roof side rail to the center frame through the load transmission member at the time of a side collision, and the center frame is bent and deformed in a direction in which the center frame protrudes upward. FIG. It is a schematic diagram which shows the deformation | transformation state of a center frame after predetermined time progress since a side collision occurrence.

Explanation of symbols

10 Roof side rail 12 Center frame (reinforcing member)
12A Load receiving portion 14 Load transmitting member 26 Vehicle roof 30 Roof opening 38 Reinforcing plate 40 Coupling portion 42 Load transmitting end
A Clearance S Vehicle roof structure

Claims (2)

Roof side rails respectively extending in the vehicle front-rear direction on both sides in the vehicle width direction at the top of the vehicle;
A reinforcing member provided on the vehicle roof, extending in the vehicle width direction between the roof side rails on both sides, and provided with load receiving portions on both ends;
A load that is coupled to the roof side rail and the reinforcing member so as to connect the roof side rail and the reinforcing member, and is close to the load receiving portion in the vehicle width direction below the coupling portion with the reinforcing member. A transmission end is provided, and a portion corresponding to the coupling portion and a portion corresponding to the load transmission end have a double structure in which a reinforcing plate is joined, and bending stress generated in the reinforcing member at the time of a side collision is A load transmission member that can be adjusted by setting the height of the load transmission end with respect to the part,
A vehicle roof structure in which the load transmission end has a closed cross-sectional structure having a gap between the load transmission member and the reinforcing plate .   The vehicle roof structure according to claim 1, wherein the reinforcing member is a center frame disposed so as to straddle a roof opening formed in the vehicle roof.

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