JP2012121501A - Roof side structure of vehicle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an increase in automobile mass by a plate thickness increase without causing the complication of a skeleton frame structure and the deterioration in moldability-assembling performance for required strength and rigidity by a head-on collision and a countermeasure for preventing projection to the occupant side of a skeleton by the rollover of an automobile.SOLUTION: A roof side rail 8 is constituted of an outer panel 8-1 positioned outside a vehicle body and an inner panel 8-2 positioned at the cabin side. A reinforcing member 10 arranged so that a space exists at the outer panel 8-1 has a joining flange 10b having an end side ridge line joined to the roof side rail 8 at both ends in its longitudinal direction between the outer panel 8-1 and the inner panel 8-2, and an intermediate part ridge line 10d is arranged by forming a bending part 10c presenting a projection shape on the inner panel 8-2 side between both end side ridge lines 10a in the joining flange 10b of the reinforcing member 10.

Description

  The present invention relates to a roof side structure of a vehicle body in an automobile.

  As this type of conventional technology, for example, a “body frame frame reinforcing structure” described in Patent Document 1 or a “vehicle body roof side structure” described in Patent Document 2 is known. The “reinforcement structure of a vehicle body skeleton frame” described in Patent Document 1 is a structure in which a pillar structure constituting a vertical skeleton member of a vehicle body skeleton frame is divided into a hollow pillar body and a reinforcement (reinforcement member) installed therein. In this configuration, the reinforce is formed with a clearance for bending deformation between the vicinity of the lowest strength portion of the pillar body and the reinforce. The “body frame frame reinforcing structure” described in Patent Document 1 configured as described above causes the pillar body to bend and deform at the lowest strength portion when an impact load is applied to the pillar structure. Since the pillar body and the reinforcement are not joined in the vicinity of the part, and the clearance for the bending deformation of both is formed between them, the deformation generated in the pillar body is not immediately transmitted to the reinforcement In addition, since the pillar main body and the reinforcement are joined at portions other than the lowest strength portion of the pillar main body, the load transmission between the two has a large degree of bending deformation of the pillar main body. It will be performed not only in the vicinity of the lowest strength part but also in the joint part away from it, and load and deformation are distributed over a wide range of pillar structures. Is that without the jar.

  The “body frame frame reinforcing structure” described in Patent Document 2 is a vehicle body roof side structure in which a reinforcing member elongated in the longitudinal direction of the vehicle body is provided at the outer edge in the vehicle width direction of the roof panel of the vehicle body. In order to set an input point for at least two loads while the roof side portion between the front pillar and the center pillar receives a load and deforms to the vehicle interior side by a predetermined amount, It is configured by providing a protrusion that protrudes above the vehicle body. The “vehicle body roof side structure” described in Patent Document 2 configured as described above is configured to allow a load to escape to the front pillar and the center pillar by providing a protrusion on the roof side portion that protrudes when the vehicle body rolls over. In order to reduce the deformation of the roof side part at the time of rollover.

JP 2003-205858 A JP 2008-62713 A

  However, in the conventional technique described in Patent Document 1, a clearance is formed between the reinforcement near the lowest strength portion of the pillar body and the reinforcement, and the automobile rolls over to roll over. In such a case, it can be said that it is effective as a countermeasure against rollover because the lowest strength part can be deformed to absorb impact energy. On the other hand, since the strength sudden change part which becomes the lowest strength part is set, when a frontal collision of the car etc. occurs, stress concentration occurs in the strength sudden change part, and the strength of the vehicle body is accompanied by such stress concentration. There is a possibility of decline. In addition, the setting of the suddenly changing part of the strength complicates the shape of the parts that make up the vehicle body skeleton frame, which may result in deterioration of formability and assembly.

  In the prior art described in Patent Document 2, the load received by the roof side portion is received at at least two load input points formed by the protruding protrusions to prevent the generation of concentrated loads, and the front pillar Alternatively, the moment generated in the roof side portion is reduced by flowing through the center pillar, and it can be said that the rigidity burden as a skeleton can be reduced. However, in order to set the protrusion, another part (input bracket) constituting the protrusion is required, and such another part is installed in the hollow portion of the roof side. As a result, the skeleton cross section of the roof side is reduced, and the strength and rigidity potential of the skeleton is lowered. Therefore, in order to satisfy the required strength and rigidity in such a part, an increase in the plate thickness that eliminates the reduction of the skeleton cross section is required, which may lead to an increase in the mass of the automobile.

  Therefore, the present invention does not cause complication of the skeleton frame structure and deterioration of formability and assemblability with measures to prevent the skeleton part from protruding to the occupant side due to rollover of the automobile and the necessary strength and rigidity due to the frontal collision, And it aims at providing the roof side structure of the vehicle body achieved without bringing about the increase in the vehicle mass by plate | board thickness increase.

  The roof side structure of the vehicle body according to the present invention supports the outer edge in the vehicle width direction of the roof panel by installing the roof pillars so as to bridge between the front pillars and the center pillars that are spaced apart from each other in the vehicle longitudinal direction. A roof side structure of a vehicle body provided with a roof side rail, wherein the roof side rail is composed of an outer panel positioned on the outside of the vehicle body and an inner panel positioned on the vehicle compartment side, and the outer panel is disposed between the outer panel and the inner panel. The reinforcing member is disposed so that a space portion is formed by being spaced apart from each other, and the reinforcing member has an end side ridge line for joining to the roof side rail at both longitudinal ends thereof, respectively. Bending that has a flange and has a protruding shape on the inner panel side between the ridge lines on both ends of the joint flange of the reinforcing member Characterized in that a middle portion ridge by forming.

  Therefore, when the automobile encounters a rollover, the space formed by the reinforcing member and the outer panel is crushed to absorb the impact caused by the rollover, and the inner panel is bent and deformed to protrude into the vehicle interior. It is possible to protect passengers safely. On the other hand, when an automobile encounters a frontal collision, the roof side is provided by providing an intermediate ridgeline in addition to a pair of ridgelines at the end of the reinforcing member against the compressive load in the longitudinal direction of the vehicle body due to the frontal collision. Deformation such as rail cross-section collapse is suppressed. Therefore, the roof side structure of the vehicle body according to the present invention has a plurality of directions caused by rollover, frontal collision, etc. due to the space formed by the outer panel and the reinforcing member, and the pair of end side ridge lines and the intermediate ridge line of the reinforcing member. Therefore, it is possible to connect the roof side rail to a rational structure as a whole without taking measures such as an increase in the plate thickness.

  As an embodiment according to the present invention, both joint flange portions of the reinforcing member may be joined to the inner wall facing the inner panel side of the outer panel.

  With such a configuration, even if the reinforcing member is joined between the outer panel and the inner panel, the joining portion of the reinforcing member is overlapped with the outer panel (even if an outer plate is inserted), the outer panel and the inner panel are overlapped. Combined with the joining portion formed by overlapping two panels, it is possible to facilitate spot welding or laser welding.

  Further, as an embodiment according to the present invention, both joint flange portions of the reinforcing member are joined to the outer surface walls of the joint flange portions formed at both ends of the inner panel, and both side wall portions of the reinforcing member are joined to the inner wall of the outer panel. It may be configured to be joined to both tip portions.

  With such a configuration, even if the reinforcing member is joined between the outer panel and the inner panel, the joining portion of the reinforcing member is a double stack with the inner panel or the outer panel or a triple stack including the outer plate, and spot welding or laser welding. Etc. can be facilitated.

  Moreover, as an embodiment according to the present invention, the reinforcing member may be configured to extend between joint portions of the roof side rail with the front pillar and the center pillar.

  With such a configuration, the roof side rail is usually disposed at the upper part of the head side of the occupant seated in the front seat of the automobile, and there is a reinforcing member between the joints of the front pillar and the center pillar in the roof side rail. become. As a result, the reinforcing member works rationally to protect the occupant when the vehicle rolls over and at the time of a frontal collision.

  In the present invention, when the automobile encounters a rollover, the space formed by the reinforcing member and the outer panel is crushed to absorb the impact due to the rollover, and the inner panel is bent and deformed to protrude into the vehicle interior. It is possible to protect the passengers safely. On the other hand, when a car encounters a frontal collision accident, it is possible to suppress deformation such as cross-sectional collapse of the roof side rail by providing an intermediate ridge line in addition to the pair of end ridge lines in the reinforcing member. become.

  Therefore, the roof side structure of the vehicle body according to the present invention includes a plurality of parts caused by a rollover or a frontal collision by a pair of end ridge lines and intermediate ridge lines of the reinforcing member in addition to the space formed by the outer panel and the reinforcing member. Since it becomes possible to cope with the input load form in the direction, it is possible to connect the roof side rail to a rational structure as a whole without taking measures such as an increase in the plate thickness.

1 is a schematic perspective view depicting a vehicle body skeleton in the vicinity of a roof in an embodiment when the present invention is applied to a passenger car. It is the disassembled perspective view which drawn the vehicle body frame | skeleton of the roof vicinity in FIG. It is AA sectional drawing of FIG. 1 in Example 1 which concerns on this Embodiment. It is AA sectional drawing of FIG. 1 in Example 2 which concerns on this Embodiment.

  The roof side structure of the automobile in this embodiment is a countermeasure for preventing the skeleton part from protruding to the occupant side due to the rollover of the automobile, and the required strength and rigidity due to the frontal collision are complicated, formability and assemblability of the skeleton frame structure. In addition, the vehicle mass is not increased, and the vehicle mass is not increased due to the increase in the plate thickness.

  Next, an example when the embodiment according to the present invention is applied to a passenger car will be described with reference to the drawings. First, in FIGS. 1 and 2, a roof panel 2 forms a ceiling portion of a passenger compartment 3 in a vehicle body 1 of an automobile. The roof panel 2 is configured with the roof side portion 4 supporting the outer edge portion in the vehicle width direction.

  Further, the roof side portion 4 is supported by pillars of a front pillar 5, a center pillar 6, and a rear pillar 7 that are sequentially arranged from the front to the rear of the automobile. The roof side portion 4 includes a roof side rail 8 that extends in the longitudinal direction of the vehicle body 1 and an outer plate 9 that is joined to cover the outside of the vehicle body of the roof side rail 8. (See FIG. 3).

  As shown in FIGS. 2 and 3, the roof side rail 8 has an outer panel 8-1 located outside the vehicle body 1 and an inner panel 8-2 disposed on the vehicle compartment 3 side. And it has the closed cross-section structure formed by joining the joining flange part 8-1a of the outer panel 8-1, and the joining flange part 8-2a of the inner panel 8-2. The outer panel 8-1 has a substantially hat-shaped cross section with a large amount of protrusion protruding outward from the vehicle body 1, and the inner panel 8-2 has a small cross section with a small amount of protrusion protruding toward the passenger compartment. It has a substantially hat shape.

  Further, the roof side rail 8 is supported by the center pillar 6 being joined to the substantially central portion thereof, and the front pillar 5 and the rear pillar 7 being joined to both ends thereof.

  And in the closed cross section which the outer panel 8-1 and the inner panel 8-2 in the roof side rail 8 form, in the state which formed the space part 12 by separating with respect to the outer panel 8-1, a steel plate is pressed. A molded reinforcing member 10 is disposed. The reinforcing member 10 is configured to extend in the longitudinal direction of the vehicle body at a portion of the roof side rail 8 where the front door glass 11 faces between the joint portions of the front pillar 5 and the center pillar 6. Both end portions are respectively formed on the joining flange portions 10b and 10b having the end side ridge lines 10a and 10a so as to be joined to the inner wall 8-1b of the outer panel 8-1. Further, the reinforcing member 10 has an intermediate ridge line 10d formed by forming a bent portion 10c having a protruding shape on the inner panel 8-2 side between the ridge lines on both ends of the joint flange portions 10b and 10b. Yes. The intermediate ridge line 10d also extends in the longitudinal direction, which is the vehicle body longitudinal direction of the reinforcing member 10. Further, the reinforcing member 10 is joined to the outer panel 8-1 by spot welding or laser welding in a state where the joining flange portions 10b and 10b are superposed on the inner wall 8-1b of the outer panel 8-1.

  In the first embodiment according to the present invention having the above-described configuration, when the automobile encounters a rollover, the space portion 12 formed between the outer panel 8-1 and the reinforcing member 10 is crushed. Thus, the impact caused by the rollover can be alleviated to prevent the inner panel 8-2 from being crushed and protruding into the passenger compartment, thereby protecting the occupant safely.

  Further, when the automobile encounters a frontal collision accident, the intermediate member ridgeline 10d is provided in addition to the pair of end-side ridgelines 10a in the reinforcing member 10, thereby increasing the resistance to the compressive load in the longitudinal direction of the vehicle body due to the frontal collision. And deformation, such as cross-sectional collapse of the roof side rail 8, is suppressed.

  Accordingly, the reinforcing member 10 has a plurality of input load forms caused by rollover, frontal collision, and the like by the space portion 12 formed between the outer panel 8-1 and the pair of end-side ridge lines 10a and the intermediate-side ridge line 10d. Therefore, it is possible to connect the roof side rail to a rational structure as a whole without taking measures such as increasing the plate thickness.

  Moreover, even if the reinforcing member 10 is joined between the outer panel 8-1 and the inner panel 8-2 by the configuration according to the first embodiment, the joining portion of the reinforcing member 10 is overlapped with the outer panel 8-1. Even if the outer plate 9 is inserted, it is three-layered, and therefore, it is possible to facilitate spot welding, laser welding, etc. in combination with the joint portion by two-layered outer panel 8-1 and inner panel 8-2. it can.

  Furthermore, with the configuration according to the first embodiment of the present invention, the reinforcing member is configured to extend between the joint portions of the roof side rail 8 with the front pillar 5 and the center pillar 6. The reinforcing member 10 is present at the upper part of the head side of the occupant seated in the front seat, so that the reinforcing member 10 works rationally for protecting the occupant even when the vehicle rolls over and during a frontal collision. Become.

  Next, Embodiment 2 according to the present invention will be described with reference to FIG. In the second embodiment, the reinforcing member 10 joins both the joining flange portions 10b and 10b to the outer surface wall 8-2b of the joining flange portion 8-2a formed at both ends of the inner panel 8-2. The two side wall portions 10e are joined to both front end portions of the inner wall 8-1b of the outer panel 8-1, and there are structural differences from the first embodiment.

  Also in the second embodiment according to the present invention having the above-described configuration, when the automobile encounters a rollover, the space portion 12 formed in a state where the outer panel 8-1 and the reinforcing member 10 are separated from each other. As a result, the impact caused by the rollover can be reduced, and the occupant can be safely protected by preventing the inner panel 8-2 from being crushed and protruding into the vehicle interior.

  Further, when the automobile encounters a frontal collision accident, the intermediate member ridgeline 10d is provided in addition to the pair of end-side ridgelines 10a in the reinforcing member 10, thereby increasing the resistance to the compressive load in the longitudinal direction of the vehicle body due to the frontal collision. And deformation, such as cross-sectional collapse of the roof side rail 8, is suppressed.

  Therefore, the reinforcing member 10 forms a space 12 between the outer panel 8-1 and provides an intermediate ridge line 10d in addition to the pair of end ridge lines 10a. Since it is possible to cope with the generated input load forms in a plurality of directions, it is possible to connect the roof side rail to a rational structure as a whole without taking measures such as an increase in the plate thickness.

  Furthermore, even if the reinforcing member 10 is joined between the outer panel 8-1 and the inner panel 8-2 by the configuration of the second embodiment, the joining portion of the reinforcing member 10 is the inner panel 8-2 or the outer panel 8-. It becomes two-layered with 1 or three-layered with the outer plate 9, and spot welding or laser welding can be facilitated.

  In the present invention described above, the reinforcing member forms a space with the outer panel, and in addition to the pair of end side ridge lines, an intermediate ridge line is provided, so that a plurality of directions caused by rollover, frontal collision, etc. Since it is possible to cope with the input load form, it is possible to connect the roof side rail to a rational structure as a whole without taking measures such as increasing the plate thickness. It can be said that this is suitable.

DESCRIPTION OF SYMBOLS 1 Car body 2 Roof panel 3 Car compartment 4 Roof side part 5 Front pillar 6 Center pillar 7 Rear pillar 8 Roof side rail 8-1 Outer panel 8-1a Joining flange part
8-1b Inner surface wall 8-1c Outer wall 8-2 Inner panel 8-2a Joining flange 8-2b Outer wall 9 Outer plate 10 Reinforcing member 10a End side ridge line 10b Joining flange 10c Middle ridge 10e Side wall 11 Front Door glass 12 space

Claims (4)

  A roof side structure of a vehicle body having a roof side rail that supports an outer edge in a vehicle width direction of the roof panel by installing the bridges so as to bridge between the front pillars and the center pillars that are spaced apart from each other in the vehicle body longitudinal direction. The roof side rail is composed of an outer panel located on the outer side of the vehicle body and an inner panel located on the vehicle compartment side, and is separated from the outer panel between the outer panel and the inner panel. The reinforcing member is disposed so that a portion is formed, and the reinforcing member has a joining flange portion having an end side ridge line for joining to the roof side rail at both longitudinal ends thereof, and the reinforcing member The intermediate portion is formed by forming a bent portion having a protruding shape on the inner panel side between the ridge lines on both ends of the joint flange portion of Vehicle roof side structure characterized in that a line.   2. The roof side structure for a vehicle body according to claim 1, wherein both joint flange portions of the reinforcing member are joined to an inner wall facing the inner panel side of the outer panel.   Both the joint flange portions of the reinforcing member are joined to the outer surface walls of the joint flange portions formed at the joint flange portions formed at both end portions of the inner panel, and both side wall portions of the reinforcing member are joined to both inner wall surfaces of the outer panel. 2. The roof side structure for a vehicle body according to claim 1, wherein the roof side structure is configured to be joined to a front end portion.   The vehicle body according to any one of claims 1 to 3, wherein the reinforcing member is configured to extend between joint portions of the roof side rail with the front pillar and the center pillar. Roof side structure.

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