WO2014069373A1 - Automobile body structure - Google Patents

Abstract

A lower framework (48) which consists of CFRP and which has a U-shape in a plan view is configured from left and right front pillar lower sections (16), left and right side sills (15), left and right rear pillars (17), and a cross member (18). An upper framework (49) which consists of CFRP, has a hollow cross-section, and has an H-shape in a plan view is configured from: left and right center pillars (30) which each rise from the center, in the front-rear direction, of a corresponding one of the left and right side sills (15); a roof arch (31) which connects, in the widthwise direction of the vehicle, the upper ends of the left and right center pillars (30); and left upper front and rear frames (32, 33) and right upper front and rear frames (32, 33), the left upper front and rear frames (32, 33) and the right upper front and rear frames (32, 33) connecting, in the front-rear direction, the upper ends of the left and right front pillar lower sections (16), the upper ends of the left and right center pillars (30), and the upper ends of the left and right rear pillars (17).

Description

Body structure of car

According to the present invention, a vehicle body formed by combining a lower outer skin and an upper inner skin comprises a floor panel portion, a front wall portion rising from a front end of the floor panel portion, and a rear portion of the floor panel portion A rear wall standing from an end, left and right side sills standing from an outer end in the vehicle width direction of the floor panel portion, left and right front pillar lower portions connecting the front wall and the left and right side sills, A rear wall portion and left and right rear pillar portions connecting the left and right side sill portions, and a cross member portion extending along the upper end of the rear wall portion in the vehicle width direction and connecting upper ends of the left and right rear pillar portions It relates to the body structure of a car.

It is known from Patent Document 1 below that a fiber-reinforced resin floor of an automobile is configured by sandwiching a honeycomb between upper and lower floor panels.

Further, Japanese Patent Application Laid-Open No. 2003-147269 discloses that an automobile front side frame and a dash front panel made of fiber reinforced resin are connected by an energy absorbing member made of an aluminum alloy die cast member.

Japanese Patent Application Publication No. JP-A-2003-147147 discloses that upper and lower portions of a light alloy suspension member of a front wheel of an automobile are fixed to a body frame made of fiber reinforced resin.

Further, an outer skin and an inner skin made of fiber reinforced resin are vertically joined to constitute a floor module of an automobile, and a metal suspension member is fastened to a core provided on the rear wall of the floor module as described in the following patent document No. 4 is known.
Japanese Utility Model Application Publication No. 57-130772 Japanese Unexamined Patent Publication No. 2010-155539 European Patent Publication EP 0900716 B1 Japan JP 2012-140083

By the way, although what was described in the said patent document 1 improves the rigidity of a floor by a honeycomb structure, it was not able to satisfy the collision performance as the whole vehicle body.

In addition, as described in Patent Document 2 described above, it is necessary to increase the thickness of the dash front panel supporting the energy absorbing member in order to sufficiently support the collision load of the frontal collision, thereby increasing the thickness. And there is a problem that causes weight increase.

In addition, since the suspension member made of light alloy is not connected to the dash front panel in the case described in Patent Document 3, the collision load of the frontal collision can not be transmitted from the suspension member to the dash front panel and absorbed. There was a problem that.

In addition, since the collision load of the rear surface collision input to the metal suspension member is transmitted to the floor module as described in Patent Document 4 described above, it is necessary to increase the thickness of the floor module. There was a problem that caused the increase.

The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide an automobile body structure capable of efficiently absorbing a collision load input from various directions while minimizing an increase in weight. .

In order to achieve the above object, according to the present invention, a vehicle body formed by combining a lower outer skin and an upper inner skin is erected from a floor panel portion and a front end of the floor panel portion. Connect the wall, the rear wall standing up from the rear end of the floor panel, and the left and right side sills standing up from the outer end of the floor panel in the vehicle width direction, the front wall and the left and right side sills Extending in the vehicle width direction along the upper ends of the left and right front pillar lower portions, the left and right rear pillars connecting the rear wall portion and the left and right side sill portions, and the upper ends of the left and right rear pillar portions A vehicle body structure of an automobile including a cross member portion connecting the front and rear, the left and right front pillar lower portions, the left and right side sill portions, the left and right rear pillar portions, and the front A cross member portion and a lower frame made of CFRP in plan view and having a U shape in a plan view, and left and right center pillars standing from the center in the front and rear direction of the left and right side sill portions H-shape in plan view with roof arches connecting in the direction, upper ends of the left and right front pillar lower parts, upper ends of the left and right center pillars, and left and right upper front and rear frames connecting the upper ends of the left and right rear pillars in the front and rear direction It is a first object of the present invention to propose a car body structure of an automobile, characterized in that the upper frame of the hollow section made of CFRP is formed.

Further, according to the present invention, in addition to the first feature, there is proposed a vehicle body structure of an automobile according to a second feature in which the center pillar is connected to the side sill portion through a metal connecting member. .

Further, according to the present invention, in addition to the first or second feature, a metal rear frame integrally formed with a damper housing of a rear wheel is disposed on a rear surface of the rear pillar portion which is inclined upward toward the rear. According to a third aspect of the present invention, there is proposed a vehicle body structure of an automobile, characterized in that it is connected.

Further, according to the present invention, in addition to the third feature, a first flange obtained by bending a lower portion of the rear edge in the vehicle width direction of the rear frame forward, and a second flange obtained by bending the lower edge of the rear frame forward According to a fourth aspect of the present invention, there is provided a vehicle body structure of an automobile according to the fourth aspect, wherein the first and second flanges are connected to corners of the outer lower end of the outer skin in the vehicle width direction. Is proposed.

According to the present invention, in addition to the third or fourth feature, a pair of left and right hollow crash rails extending rearward from the rear surface of the rear frame are provided, and the front end of the crash rail is formed on the rear frame According to a fifth aspect of the present invention, there is proposed a vehicle body structure of an automobile, which is characterized by fitting into a recess.

Further, according to the present invention, in addition to any one of the third to fifth features, the rear wall is configured to extend from the rear wall to which the rear frame is connected to the side sill. According to a sixth aspect of the present invention, there is provided a vehicle body structure of an automobile, characterized in that an L-shaped connecting plate for connecting the outer skin and the inner skin constituting the side sill portion is disposed.

Further, according to the present invention, in addition to any one of the first to sixth features, the inside of the side sill portion is partitioned by the partition plate into the upper space and the lower space, and the outer end of the partition plate in the vehicle width direction is According to a seventh aspect of the present invention, there is provided a vehicle body structure of an automobile, characterized in that the outer skin and the inner skin are jointed with a joint flange.

Further, according to the present invention, in addition to any one of the first to seventh features, a steering hanger support bracket connected to the front end of the upper front and rear frames is provided on the upper portion of the front pillar lower portion. An eighth aspect is proposed a vehicle body structure of an automobile.

Further, according to the present invention, in addition to the first feature, an insert member is provided on the back surface of the outer skin which constitutes the corner portions of both ends in the vehicle width direction of the rear wall portion. According to a ninth aspect of the present invention, there is proposed a car body structure of an automobile, characterized in that a mounting portion at a front portion of a metal rear frame integrally formed with a portion is bolted to the insert member.

According to the present invention, in addition to the ninth feature, a tenth feature is that a plurality of inner ribs extending upward from the upper surface of the damper housing are formed on the inner surface in the vehicle width direction of the rear frame. A car body structure is proposed.

Further, according to the present invention, in addition to the tenth feature, a rear end frame extending rearward and downward from an upper end of the rear pillar portion is provided, the connection portion of the rear pillar portion and the rear end frame is reinforced by a connecting member, According to an eleventh aspect of the present invention, there is proposed a vehicle body structure of an automobile, wherein the upper end of the rib is connected to the connecting member.

Further, according to the present invention, in addition to the eleventh feature, an outer rib facing the inner rib is formed on the outer surface in the vehicle width direction of the rear frame, and the upper end of the outer rib is connected to the connecting member. A car body structure of an automobile having a twelfth feature is proposed.

Further, according to the present invention, in addition to any one of the ninth to twelfth features, a first flange obtained by bending a lower portion in the vehicle width direction outer edge of the rear frame forward, and a lower edge of the rear frame forward A second flange bent in the form of an L-shape, and connecting the first and second flanges to corners of the outer lower end in the vehicle width direction of the outer skin constituting the A car body structure characterized by the present invention is proposed.

According to the present invention, in addition to any one of the ninth to thirteenth features, a pair of left and right hollow crash rails extending rearward from the rear surface of the rear frame is provided, and a front end of the crash rail is the rear According to a fourteenth aspect of the present invention, there is proposed a car body structure for an automobile, which is characterized by fitting into a recess formed in a frame.

Further, according to the present invention, in addition to any one of the ninth to fourteenth features, the rear wall is configured to extend from the rear wall to which the rear frame is connected to the side sill. According to a fifteenth feature of the present invention, there is provided a car body structure of an automobile, characterized in that an L-shaped connecting plate for connecting the outer skin and the inner skin constituting the side sill portion is disposed.

According to the present invention, in addition to any one of the ninth to fifteenth features, the inside of the side sill portion is partitioned by a partition plate into an upper space and a lower space, and the outer end of the partition plate in the vehicle width direction is According to a sixteenth aspect of the present invention, there is proposed a car body structure of an automobile, characterized in that the outer skin and the inner skin are joined between the joint flanges.

Further, according to the present invention, in addition to any one of the ninth to sixteenth features, a seventeenth feature is that a reinforcing member is disposed in a lower portion of the rear wall portion to which the rear frame is connected. The vehicle body structure of the said description is proposed.

Further, according to the present invention, in addition to the fourteenth feature, there is provided an automobile according to an eighteenth feature, wherein a cargo compartment is formed at the rear of the rear frame, and the crush rail is connected to the bottom wall of the cargo compartment. Is proposed.

Further, according to the present invention, in addition to the first feature, in the internal space from the front pillar lower portion to the front portion of the side sill portion, it is formed in an L shape as viewed in the vehicle width direction A reinforcing member having a hat-like cross-section opening toward the front, and dividing the inside of the side sill into an upper space and a lower space by a partition plate, the reinforcing member being connected to the front wall and the rear wall of the front pillar lower portion According to a nineteenth aspect of the present invention, there is proposed a car body structure of an automobile characterized by connecting to the upper wall of the side sill portion and the partition plate.

According to the present invention, in addition to the nineteenth feature, an upper member extending forward from a front wall of the front pillar lower portion is provided, and the reinforcing member faces the rear of the upper member. A car body structure characterized by the present invention is proposed.

Further, according to the present invention, in addition to the nineteenth or twentieth features, a twenty-first feature is that the outer edge in the vehicle width direction of the partition plate is sandwiched between the bonding flanges of the outer skin and the inner skin. A car body structure is proposed.

Further, according to the present invention, in addition to any one of the nineteenth to twenty-first features, an automobile according to a twenty-second aspect of the automobile, wherein an inner edge in a vehicle width direction of the partition plate is connected to an inner wall of the side sill portion. A car body structure is proposed.

According to the present invention, in addition to any one of the nineteenth to twenty-second features, a pipe-like load transfer member extending in the front-rear direction is disposed at the boundary between the floor panel portion and the side sill portion. A car body structure of an automobile according to a twenty-third aspect is proposed.

Further, according to the present invention, in addition to any one of the nineteenth to twenty-third features, the shock absorbing member bent in a zigzag manner is disposed in the upper space behind the reinforcing member of the side sill portion. According to a twenty-fourth feature of the present invention, a vehicle body structure of an automobile is proposed.

According to the present invention, in addition to any one of the nineteenth to twenty-fourth features, steering hangers are fixed on both sides in the vehicle width direction of the connection portion with the reinforcing member on the rear wall of the front pillar lower portion. According to a twenty-fifth feature of the present invention, there is proposed a vehicle body structure of an automobile, wherein a mounting seat is provided.

According to the present invention, in addition to any one of the nineteenth to twenty-fifth features, an inner bulkhead extending horizontally between the inner wall of the side sill portion and the reinforcing member is disposed, and the side sill is also provided. An outer bulkhead extending horizontally between the outer wall of the head and the reinforcing member, and connecting the front wall of the front pillar lower portion and the upper wall of the side sill portion with the inner bulkhead and the outer bulkhead According to a twenty-sixth feature, a vehicle body structure of an automobile is proposed.

Further, according to the present invention, in addition to the first feature, a floor tunnel is formed extending in the front-rear direction with an opening opening downward at the center in the vehicle width direction of the floor panel portion. The outer skin is raised upwards and superimposed on the lower surface of the inner skin at a portion where the floor panel portion continues to the floor tunnel, and the outer skin and the outer skin are bridged. According to a twenty-seventh aspect of the present invention, there is proposed an automobile body structure characterized in that a tunnel brace fastening seat for fastening the tunnel brace is formed in the overlapping portion of the inner skin.

Further, according to the present invention, in addition to the twenty-seventh feature, there is proposed a car body structure of an automobile, wherein a twenty-eighth feature is that the tunnel brace is a plate that bends in a wave shape when viewed in the vehicle width direction.

According to the present invention, in addition to the twenty-seventh or twenty-eighth feature, there is proposed a vehicle body structure of an automobile, characterized in that the inner skin is raised upward at the tunnel brace fastening seat.

Further, according to the present invention, in addition to any one of the twenty-seventh to twenty-ninth features, the tunnel brace fastening seat is covered with a cross member coupled to the upper surface of the inner skin. A car body structure is proposed.

Further, according to the present invention, in addition to the above-mentioned thirtieth feature, the cross member is a member made of fiber reinforced resin having a front wall and a rear wall and the lower surface being open, and the inclination angle with respect to the vertical direction is the rear According to a thirty-first aspect of the present invention, there is proposed an automobile body structure characterized in that a seat fastening seat for fastening a seat to the front wall larger than the inclination angle of the wall is formed.

Further, according to the present invention, in addition to any one of the above-mentioned twenty-seventh to thirty-first features, a pipe-like shape extending in the front-rear direction at the boundary between the floor panel part and the side sill part continuously provided on the outside in the vehicle width direction. According to a thirty-second feature of the present invention, there is proposed a vehicle body structure of a motor vehicle, wherein a load transfer member of

Further, according to the present invention, in addition to any one of the twenty-seventh to thirty-second features, the tunnel braces on the front side and the rear side are provided, and the tunnel braces on the rear side are formed at the rear of the floor panel portion. According to a thirty-third feature of the present invention, a vehicle body structure of a motor vehicle is proposed, which is disposed in the vicinity of the in-vehicle component storage recess.

Further, according to the present invention, in addition to the thirty-third feature, the core material is formed of a fiber reinforced resin corrugated sheet having a large number of concavo-convex portions extending in a ripple shape, and the concavo-convex portions are the front and rear sides. An automobile body structure having an apex on a line extending in the vehicle width direction through a longitudinal middle position of the tunnel brace and expanding toward the front and rear tunnel braces. Suggested.

The recess 12a of the floor panel portion 12 of the embodiment corresponds to the tunnel brace fastening seat of the present invention, and the inner upper wall 15b and the outer upper wall 15c of the side sill portion 15 of the embodiment are above the side sill portion of the present invention. Corresponding to the wall, the front pillar 32 and the roof side rail 33 of the embodiment correspond to the upper front and rear frames of the present invention, and the cargo room rear bottom wall 40 of the embodiment corresponds to the bottom wall of the cargo space of the present invention The nut 61 of the embodiment corresponds to the mounting seat of the present invention, the nut 66 of the embodiment corresponds to the seat fastening seat of the present invention, and the nut 73 of the embodiment corresponds to the insert member of the present invention.

According to the first feature of the present invention, the vehicle body of the automobile formed by combining the lower outer skin and the upper inner skin comprises a floor panel portion and a front wall portion rising from the front end of the floor panel portion. The rear wall standing up from the rear end of the floor panel, the left and right side sills standing from the outer end of the floor panel in the vehicle width direction, and the left and right front pillar lowers connecting the front wall and the left and right side sills And a cross member portion extending along the upper end of the rear wall portion in the vehicle width direction to connect the upper ends of the left and right rear pillar portions. A lower frame made of CFRP in a U-shape in plan view is formed by left and right front pillar lower parts, left and right side sill parts, left and right rear pillar parts, and cross member parts, and from the center in the front and rear direction of the left and right side sill parts The left and right center pillars, the roof arch connecting the upper ends of the left and right center pillars in the vehicle width direction, the upper ends of the left and right front pillar lower portions, the upper ends of the left and right center pillars and the upper ends of the left and right rear pillars Since the upper skeleton of the hollow cross-section made of CFRP of a H-shape in plan view is constituted by the left and right upper front and rear frames connected in the direction, a high-strength and lightweight casing can be formed between the lower skeleton and the upper skeleton. In addition, the U-shaped lower frame and the upper front and rear frames of the upper frame support the collision load of the front collision or the rear collision, and the thickness of the floor panel can be reduced to reduce the weight as well as the collision load of the side collision Can be supported by the side sill of the lower skeleton and the center pillar and roof arch of the upper skeleton to reduce the cross-sectional area of the side sill and reduce weight.

Further, according to the second feature of the present invention, since the center pillar is connected to the side sill portion via the metal connection member, when the collision load of the side collision is input to the side sill portion, the metal connection member is ductile. By plastically deforming to absorb an impact, it is possible to prevent the center pillar from falling to the vehicle compartment side.

Further, according to the third feature of the present invention, since the metal rear frame integrally formed with the damper housing of the rear wheel is connected to the rear surface of the rear pillar portion inclined upward toward the rear, the damper from the rear wheel The front upward or upward load input to the housing can be efficiently transmitted from the rear frame to the lower skeleton of the U-shape in plan view.

Further, according to the fourth feature of the present invention, the first flange formed by bending the lower portion of the rear edge in the vehicle width direction of the rear frame to the front and the second flange formed by bending the lower edge of the rear frame to the front are formed in an L shape. Since the first and second flanges are connected to the corners of the outer lower end of the outer skin constituting the rear wall in the vehicle width direction, the collision load of the rear collision is assured from the rear frame to the side sill through the rear wall. Can be transmitted to

Further, according to the fifth feature of the present invention, a pair of left and right hollow crash rails extending rearward from the rear surface of the rear frame is provided, and the front end of the crash rail fits into the recess formed in the rear frame. When a collision load is input to the crash rail, the crash rail can be crushed in the front-rear direction without breaking at a connection portion with the rear frame to absorb collision energy.

Further, according to the sixth feature of the present invention, the outer skin forming the rear wall and the inner skin forming the side sill are connected across the rear wall to which the rear frame is connected and the side sill. Since the V-shaped connecting plate is arranged, the collision load of the rear surface collision can be transmitted from the rear frame to the side sill portion through the rear wall portion and the connecting plate.

Further, according to the seventh feature of the present invention, the inside of the side sill portion is partitioned by the partition plate into the upper space and the lower space, and the outer end in the vehicle width direction of the partition plate is sandwiched between the bonding flanges of the outer skin and the inner skin. It is possible to increase the strength of the side sill portion against the collision load of the side collision, the front collision and the rear collision while minimizing the increase in weight.

Further, according to the eighth feature of the present invention, the steering hanger support bracket connected to the front ends of the upper front and rear frames is provided at the upper portion of the front pillar lower portion. The bonding strength of the upper and lower frames can be increased.

Further, according to a ninth feature of the present invention, a metal rear provided with an insert member on the back surface of the outer skin constituting the corners of both ends in the vehicle width direction of the rear wall and integrally forming the rear wheel damper housing Since the mounting portion at the front of the frame is bolted to the insert member, the collision load of the rear surface collision and the load from the rear wheel input to the rear frame are transmitted from the corners of both ends in the vehicle width direction of the rear wall to the side sill It can be transmitted and absorbed.

Further, according to the tenth feature of the present invention, since the plurality of inner ribs extending upward from the upper surface of the damper housing are formed on the inner surface in the vehicle width direction of the rear frame, the rigidity near the damper housing of the rear frame is enhanced The load input from the wheel can be reliably supported.

Further, according to an eleventh feature of the present invention, a rear end frame extending rearward and downward from the upper end of the rear pillar portion is provided, the connecting portion of the rear pillar portion and the rear end frame is reinforced by a connecting member, and the upper end of the inner rib is connected to the connecting member Thus, the load input from the rear wheel to the damper housing can be transmitted and dispersed to the rear pillar portion, the cross member portion and the rear end frame through the inner rib and the connecting member.

Further, according to a twelfth feature of the present invention, the outer rib facing the inner rib is formed on the outer surface of the rear frame in the vehicle width direction, and the upper end of the outer rib is connected to the connecting member. The rigidity in the vicinity can be increased to support the load input from the rear wheel more securely.

Further, according to a thirteenth feature of the present invention, the first flange formed by bending the lower portion of the rear edge in the vehicle width direction of the rear frame to the front and the second flange formed by bending the lower edge of the rear frame to the front form an L shape Since the first and second flanges are connected to the corners of the outer lower end of the outer skin constituting the rear wall in the vehicle width direction, the collision load of the rear collision is assured from the rear frame to the side sill through the rear wall. Can be transmitted to

Further, according to a fourteenth feature of the present invention, the vehicle is provided with a pair of left and right hollow crash rails extending rearward from the rear surface of the rear frame, and the front end of the crash rail fits into the recess formed in the rear frame. When a collision load is input to the crash rail, the crash rail can be crushed in the front-rear direction without breaking at a connection portion with the rear frame to absorb collision energy.

Further, according to a fifteenth feature of the present invention, the outer skin forming the rear wall and the inner skin forming the side sill are connected across the rear wall to which the rear frame is connected to the side sill. Since the V-shaped connecting plate is arranged, the collision load of the rear surface collision can be transmitted from the rear frame to the side sill portion through the rear wall portion and the connecting plate.

Further, according to the sixteenth feature of the present invention, the inside of the side sill portion is partitioned by the partition plate into the upper space and the lower space, and the outer end in the vehicle width direction of the partition plate is sandwiched between the joint flanges of the outer skin and the inner skin. It is possible to increase the strength of the side sill portion against the collision load of side collision, front collision and rear collision while minimizing the increase in weight.

Further, according to the seventeenth feature of the present invention, since the reinforcing member is disposed in the lower portion of the rear wall portion to which the rear frame is connected, the collision load of the rear surface collision from the rear frame to the floor panel portion via the reinforcing member It can be transmitted and dispersed.

Further, according to an eighteenth feature of the present invention, the cargo compartment is formed at the rear of the rear frame, and the crush rail is connected to the bottom wall of the cargo compartment. The rails can be crushed to absorb collision energy.

Further, according to a nineteenth feature of the present invention, in the internal space from the front pillar lower portion to the front portion of the side sill portion, a hat formed in an L shape as viewed in the vehicle width direction and opened forward and downward A reinforcing member having a cross section is disposed, and the inside of the side sill is partitioned by the partition plate into an upper space and a lower space, and the reinforcing member is connected to the front wall and the rear wall of the front pillar lower portion and the upper wall of the side sill Because it is connected to the partition plate, when the collision load of the frontal collision is input to the floor panel, the front pillar lower part efficiently transmits the collision load to the side sill and disperses it to the floor panel without falling backward. Since the partition plate can be extended to the front end of the side sill portion without interfering with the reinforcing member, the support for the collision load of the side collision can be obtained. Strength of Doshiru portion can be enhanced.

Further, according to a twentieth feature of the present invention, the upper member extending forward from the front wall of the lower portion of the front pillar is provided, and the reinforcing member faces the rear of the upper member. Can be transmitted to the side sill portion through the reinforcing member.

Further, according to the twenty-first feature of the present invention, since the outer edge of the partition plate in the vehicle width direction is sandwiched between the bonding flanges of the outer skin and the inner skin, when a collision load of a side collision is input to the side sill, the collision The load can be transmitted from the outer wall of the side sill portion to the floor panel portion through the partition plate and the inner wall.

Further, according to the twenty-second feature of the present invention, since the vehicle width direction inner edge of the partition plate is connected to the inner wall of the side sill portion, when a collision load of a side collision is input to the side sill portion, the collision load is applied to the side sill portion. It can be transmitted from the outer wall to the floor panel portion through the partition plate and the inner wall.

Further, according to the twenty-third feature of the present invention, a pipe-like load transfer member extending in the front-rear direction is disposed at the boundary between the floor panel portion and the side sill portion, so the collision load of the side collision input to the side sill portion is input. At times, the side sill portion can be prevented from falling over the floor panel portion.

Further, according to the twenty-fourth feature of the present invention, since the shock absorbing member bent in a zigzag manner is disposed in the upper space behind the reinforcing member of the side sill portion, the impact load of the side collision input to the side sill is absorbed It can be absorbed by the member.

Further, according to the twenty-fifth feature of the present invention, the mounting seat for fixing the steering hanger is provided on both sides in the vehicle width direction of the connecting portion with the reinforcing member in the rear wall of the front pillar lower portion. It can be firmly fixed to the front pillar lower portion.

According to a twenty-sixth feature of the present invention, the horizontally extending inner bulkhead is disposed between the inner wall of the side sill portion and the reinforcing member, and the horizontally extending between the outer wall of the side sill portion and the reinforcing member. Since the outer bulkheads are arranged, and the front bulkhead and the side sill top wall of the front pillar lower portion are connected by the inner bulkhead and the outer bulkhead, the collision load of the front collision is from the front pillar bottom portion to the inner bulkhead and outer bulk It can be transmitted to the side sill part via the head.

Further, according to a twenty-seventh feature of the present invention, a floor tunnel having an opening opening downward is formed at the center in the vehicle width direction of the floor panel portion to form a floor tunnel extending in the front-rear direction. The outer skin is raised upwards and is superimposed on the lower surface of the inner skin at the portion where the floor panel part continues to the floor tunnel, and the tunnel brace is fastened to the overlapping portion of the outer skin and the inner skin. To prevent the tunnel brace from protruding downward from the floor panel to secure the lowest ground clearance of the vehicle body and to center the tunnel brace in the thickness direction of the floor panel. When the collision load of a side collision approaches the floor panel, the collision load is Effectively supported by the scan can prevent collapse of the floor tunnel.

Further, according to the twenty-eighth feature of the present invention, since the tunnel brace is a plate material that bends in a wave shape when viewed in the vehicle width direction, it is possible to increase the strength of the tunnel brace against the collision load of the side collision.

Further, according to a twenty-ninth feature of the present invention, the inner skin bulges upward at the tunnel brace fastening seat, so the tunnel brace fastening seat is made deeper accordingly to increase the thickness of the tunnel brace in the vertical direction The strength of the tunnel brace against the collision load can be increased.

Further, according to the 30th feature of the present invention, since the tunnel brace fastening seat is covered by the cross member coupled to the upper surface of the inner skin, a decrease in the cabin space due to the tunnel brace fastening seat rising upward is avoided Not only can the load input to the tunnel brace fastening seat be distributed to and absorbed by the cross member.

Further, according to a thirty first feature of the present invention, the cross member is a fiber reinforced resin member having a front wall and a rear wall and the lower surface being open, and the inclination angle with respect to the vertical direction is greater than the inclination angle of the rear wall. By forming a seat fastening seat for fastening the sheet to the large front wall, not only the area of the front wall is increased to facilitate the attachment of the seat, but also the front wall is strengthened against the collision load in the longitudinal direction. Can.

Further, according to the thirty-second feature of the present invention, a pipe-like load transfer member extending in the front-rear direction is disposed at the boundary between the floor panel portion and the side sill portion continuously provided on the outer side in the vehicle width direction. When the collision load of the side collision is input, it is possible to suppress the side sill portion from falling with respect to the floor panel portion and to transmit and absorb the collision load from the side sill portion to the floor panel portion.

Further, according to a thirty-third feature of the present invention, the tunnel braces on the front and rear sides are provided, and the tunnel braces on the rear side are disposed in the vicinity of the in-vehicle component storage recess formed in the rear of the floor panel portion. By forming the recess, it is possible to reinforce the floor panel portion whose strength is reduced by the tunnel brace on the rear side.

Further, according to a thirty-fourth characteristic of the present invention, the core material is made of a fiber reinforced resin corrugated sheet having a large number of concavo-convex portions extending in a ripple shape, and the concavo-convex portions are the middle of the front and rear tunnel braces in the front-rear direction Since it has an apex on a line extending in the vehicle width direction through the position and spreads toward the front and rear tunnel braces, the collision load of the side collision input to the vehicle width direction one side of the floor panel portion is It is transmitted to the front and rear tunnel braces via the concavo-convex part of the core material on one side in the vehicle width direction, and from there to the core material on the other side in the vehicle width direction The collision load can be dispersed and absorbed.

FIG. 1 is a perspective view of a vehicle body frame of a car. First Embodiment FIG. 2 is a view in the direction of arrows in FIG. First Embodiment FIG. 3 is a view in the direction of arrows in FIG. First Embodiment FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. First Embodiment FIG. 5 is a view in the direction of arrow 5 in FIG. First Embodiment 6 is a view in the direction of arrow 6 in FIG. First Embodiment FIG. 7 is a view in the direction of arrow 7 of FIG. First Embodiment FIG. 8 is a view in the direction of arrow 8 in FIG. First Embodiment FIG. 9 is a view in the direction of arrow 9 in FIG. First Embodiment FIG. 10 is a cross-sectional view taken along line 10A-10A to line 10C-10C of FIG. First Embodiment FIG. 11 is an exploded perspective view of a first core member, a reinforcing member, a connecting plate, a reinforcing plate and a partition plate. First Embodiment FIG. 12 is a perspective view of a vehicle body frame of an automobile. Second Embodiment FIG. 13 is a view on arrow 13 in FIG. Second Embodiment FIG. 14 is a view on arrow 14 in FIG. Second Embodiment FIG. 15 is a view in the direction of arrow 15 of FIG. Second Embodiment FIG. 16 is a view in the direction of arrow 16 in FIG. Second Embodiment FIG. 17 is a cross-sectional view taken along line 17-17 of FIG. Second Embodiment FIG. 18 is an exploded perspective view of a partition plate, a reinforcing member, an inner bulkhead and an outer bulkhead. Second Embodiment FIG. 19 is a sectional view taken along line 19A-19A to 19D-19D in FIG. Second Embodiment FIG. 20 is a sectional view taken along line 20-20 of FIG. Second Embodiment 21 is a cross-sectional view taken along line 21-21 of FIG. Second Embodiment FIG. 22 is a view on arrow 22 in FIG. Second Embodiment

11 floor 12 floor panel portion 12a recessed portion (tunnel brace fastening seat)
12b In-vehicle component storage concave portion 13 front wall portion 14 rear wall portion 15 side sill portion 15b inner upper wall (upper wall) of side sill portion
15c Outside upper wall (upper wall) of side sill part
15d inner wall 15e of side sill portion outer wall 16 of side sill portion 16 front pillar lower portion 16a front wall 16b of front pillar lower portion rear wall 17 of front pillar lower portion 17 rear pillar portion 18 cross member portion 26 upper member 28 floor tunnel 29 cross member 29a front wall 29c back wall 30 center pillar 31 roof arch 32 front pillar (upper front and rear frame)
33 Roof side rail (upper front and rear frame)
34 rear frame 34c damper housing 34e first flange 34f second flange 34h inner rib 34i outer rib 34j recess 35 crash rail 37 connecting member 38 rear end frame 40 load chamber rear bottom wall (bottom wall of load chamber)
42 Outer skin 42a joint flange 43 inner skin 43a joint flange 44 core member 44a uneven part 47 connection member 48 lower frame 49 upper frame 51 partition plate 52 reinforcing member 53 inner bulkhead 54 outer bulkhead 55 shock absorbing member 56 load transmitting member 58 Steering hanger support bracket 60 Steering hanger 61 nut (mounting seat)
62F front side tunnel brace 62R back side tunnel brace 64 seat 66 nut (seating seat)
72 bolt 73 nut (insert member)
77 Reinforcement member 79 Connection plate

Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 11.

First embodiment

As shown in FIGS. 1 to 3, a vehicle body frame of an automobile includes a floor 11 made of CFRP (carbon fiber reinforced resin). The floor 11 includes a floor panel 12, a front wall 13 rising from the front end of the floor panel 12, a rear wall 14 rising from the rear end of the floor panel 12, and left and right side edges of the floor panel 12. Pair of left and right side sill portions 15 and 15 extending in the front and rear direction, and left and right front pillar lower portions 16 and 16 extending along the left and right side edges of the front wall 13 from the front ends of the left and right side sill portions 15 and 15; Cross that connects between the upper end of the left and right rear pillars 17, 17 and the pair of left and right rear pillars 17, 17 extending along the left and right sides of the rear wall 14 from the rear end of the side sill 15, 15 And a member unit 18.

A pair of left and right damper housings 19 and 19 made of aluminum alloy is fixed to a front surface of the front wall portion 13, and a pair of left and right front side frames 20 and 20 are formed integrally with the damper housings 19 and 19. A pair of CFRP crash rails 21, 21 extend forward from the front end of the front side frames 20, 20, and a CFRP rectangular frame is formed inward in the vehicle width direction of the front ends of the left and right crash rails 21, 21. The front bulkhead 22 is supported. A pair of left and right CFRP impact absorbing members 23, 23 are connected to the outside in the vehicle width direction of the front ends of the left and right crash rails 21, 21, and CFRP extends in the vehicle width direction between the front ends of the left and right impact absorbing members 23, 23. A front bumper beam 24 is connected. In a space surrounded by the left and right crash rails 21 and 21, the front bulkhead 22, the left and right impact absorbing members 23 and 23, and the front bumper beam 24, a CFRP box-shaped shroud 25 opened forward and backward is supported.

A pair of left and right CFRP upper members 26, 26 extending forward from the upper ends of the left and right front pillar lower portions 16, 16 are connected to the outer surfaces of the damper housings 19, 19 in the vehicle width direction. The front ends of the pair of CFRP lower members 27, 27 extending inward in the vehicle width direction are connected to the front bulkhead 22.

The floor panel portion 12 of the floor 11 integrally includes a floor tunnel 28 extending in the longitudinal direction center portion in the vehicle width direction and connecting the front wall portion 13 and the rear wall portion 14 and a middle portion in the front and rear direction of the floor tunnel 28 And a middle portion in the front-rear direction of the left and right side sill portions 15, 15 are connected by a CFRP cross member 29 extending in the vehicle width direction. Further, a pair of left and right center pillars 30, 30 are erected from the longitudinal middle portion of the left and right side sill portions 15, 15, and the upper ends of the left and right center pillars 30, 30 are connected by a roof arch 31 extending in the vehicle width direction. Ru. Lower portions of the center pillars 30, 30, that is, portions connected to the side sill portions 15, 15 are formed by die- cast connection members 47, 47 made of aluminum alloy.

The left and right center pillars 30, 30 and the roof arch 31 excluding the connecting members 47, 47 are integrally formed of CFRP so as to form an inverted U shape in a front view. The upper ends of the left and right front pillar lower portions 16, 16 and the upper ends of the left and right rear pillars 17, 17 are integrally formed of CFRP and connected by front pillars 32, 32 extending in the longitudinal direction and roof side rails 33, 33. . The roof side rails 33, 33 pass through the connecting portions of the left and right center pillars 30, 30 and the roof arch 31 in the front-rear direction.

The left and right front pillar lower portions 16, 16, the left and right side sill portions 15, 15, the left and right rear pillars 17, 17, and the cross member portion 18 constitute a lower frame 48 made of CFRP which has a U shape in plan view. Further, the left and right center pillars 30, 30, the roof arch 31, the left and right front pillars 32, 32, and the left and right roof side rails 33, 33 constitute an upper frame 49 made of CFRP which has an H shape in plan view.

A pair of left and right rear frames 34, 34 made of aluminum alloy is connected to the rear surface of the rear wall portion 14 of the floor 11. A pair of CFRP crash rails 35 and 35 extend rearward from the lower ends of the left and right rear frames 34 and 34, and CFRP rear bumpers extend in the vehicle width direction between the rear ends of the left and right crash rails 35 and 35. Beam 36 is connected. A pair of left and right CFRP connecting members 37, 37 are disposed between the upper ends of the left and right rear frames 34, 34 and the upper ends of the left and right rear pillars 17, 17, and a pair of left and right pairs from the upper ends of the rear pillars 17, 17 The CFRP rear end frames 38, 38 extend rearward and downward and are connected to the rear bumper beam 36.

The lower ends of the left and right rear frames 34, 34 are connected by a CFRP load chamber front bottom wall 39 extending rearward from the rear end of the floor panel portion 12, and extend rearward from the load chamber front bottom wall 39. A CFRP cargo compartment rear bottom wall 40 is connected to the rear bumper beam 36. A pair of left and right load chamber side walls 41, 41 integrally rising from the left and right side edges of the load chamber rear bottom wall 40 are connected to the rear ends of the rear frames 34, 34 and the lower ends of the connecting members 37, 37.

The floor 11 includes the lower outer skin 42 and the upper inner skin 43, the front wall 13, the left and right front pillar lower portions 16, 16, the left and right side sills 15, 15, the left and right rear pillars 17, 17 and the cross It joins and is comprised by joining flange 42a, 43a extended along the member part 18 (refer FIG. 2 and FIG. 10). Between the outer skin 42 and the inner skin 43 of the floor panel portion 12, core materials 44 formed in a corrugated plate shape by CFRP are sandwiched, and between the outer skin 42 and the inner skin 43 of the rear wall portion 14 A vertically extending first core member 45 formed in a corrugated plate shape by CFRP, and a second core member 46 extending upward from the upper end of the first core member 45 in a horizontal direction are held (FIG. 9). reference).

As shown in FIGS. 4 and 10, the outer shell of the side sill portion 15 is configured by joining the outer skin 42 and the inner skin 43 by the joining flanges 42a and 43a, and the inside of the side sill portion 15 is the outer skin 42 and inner The outer edge of the skin 43 in the vehicle width direction is sandwiched between the bonding flanges 42a and 43a, and the bonding flange 51a obtained by bending the inner edge in the vehicle width direction upward is partitioned vertically by the CFRP partition plate 51 joined to the inner surface of the inner skin 43 Be In a space above the partition plate 51 of the side sill portion 15, a CFRP impact absorbing member 55 bent in a zigzag in a side view is disposed. The upper surface of the side sill portion 15 is composed of an inner upper wall 15b and an outer upper wall 15c formed on both sides of the step portion 15a, and the upper end of the shock absorbing member 55 is on the lower surface of the inner upper wall 15b and outer outer wall 15c of the side sill portion 15. The lower end of the shock absorbing member 55 is connected to the upper surface of the partition plate 51. A load transfer member 56 formed in a pipe shape having a trapezoidal cross section by CFRP is sandwiched between the outer skin 42 and the inner skin 43 at a portion below the partition plate 51 of the side sill portion 15 and connected to the floor panel 12. Are arranged to be

As shown in FIGS. 1 and 4, steering hanger support brackets 58, 58 are fixed to the rear surfaces of the left and right front pillar lower portions 16, 16, respectively, so as to connect the left and right steering hanger support brackets 58, 58. The steering hanger 60 is fixed.

Next, the structure of the rear portion of the vehicle body will be described in detail with reference to FIGS.

The rear frame 34 made of aluminum alloy includes a plate-like side wall 34a extending in the front and rear direction and the vertical direction, and a bottom wall 34b bent inward in the vehicle width direction from the lower end of the side wall 34a. A damper housing 34c recessed inward in the vehicle width direction is integrally formed at the center of the side wall portion 34a, and the upper end of a suspension damper 71 (see FIG. 6) supporting the rear wheel is connected to the upper wall of the damper housing 34c. Be done.

Three recesses 34d are formed on the front edge of the side wall 34a of the rear frame 34, and three bolts 72 inserted in the recesses 34d from the rear to the front are the rear surface of the rear wall 14 Are screwed into the nuts 73... Inserted into the inner surfaces of the corners of both ends in the vehicle width direction of the outer skin 42 constituting the (see FIG. 8). In the rear frame 34, a first flange 34e is formed by bending a lower front edge of the side wall 34a forward, and a second flange 34f formed by bending a front edge of the bottom wall 34b is formed in an L shape. , And three bolts 74... Inserted from the rear to the front in the vicinity of the first and second flanges 34 e and 34 f form corner portions at both lower ends of the outer skin 42 in the vehicle width direction of the rear wall 14. It screw-engages to the nut 75 ... which was inserted in the inner surface (refer FIG. 8). Thus, the rear frame 34 is firmly fixed to the rear surface of the rear wall portion 14.

An upper wall 34g obtained by bending the upper edge of the side wall 34a of the rear frame 34 outward in the vehicle width direction is connected to the lower surface of the connecting member 37 (see FIG. 8). On the inner surface in the vehicle width direction of the rear frame 34, a plurality of inner ribs 34h connecting the upper wall of the damper housing 34c and the lower surface of the connecting member 37 are formed at different angles (see FIG. 7) A plurality of outer ribs 34i, which connect the upper portion of the damper housing 34c and the lower surface of the upper wall portion 34g, are formed at different angles on the outer surface in the vehicle width direction (see FIGS. 6 and 8). That is, the upper ends of the outer ribs 34i are connected to the lower surface of the connecting member 37 through the upper wall portion 34g.

The bottom walls 34b and 34b of the left and right rear frames 34 and 34 are formed in a box cross section, and the front ends of the crash rails 35 and 35 are fitted from the rear in the recesses 34j and 34j opened at the rear ends (see FIG. 7). The front bottom wall 39 of the cargo compartment holds a core member 39c made of a corrugated sheet between a pair of upper and lower skins 39a and 39b, and both end portions in the vehicle width direction are bottom wall portions 34b of the left and right rear frames 34, 34 , 34b are fixed by bolts 76... And the lower surfaces of the crash rails 35, 35 are connected to the upper surface of the luggage compartment rear bottom wall 40 (see FIG. 7).

A reinforcing member 77 made of metal is disposed in a space formed between the end in the vehicle width direction of the first core member 45 and the end in the vehicle width direction of the second core member 46 (FIGS. 9 and 11). reference). The reinforcing member 77 includes a rear wall 77a inclined in the same direction as the rear pillar 17, and a pair of side walls 77b and 77c extending forward in parallel with each other from the front of the rear wall 77a. The lower surfaces of the side walls 77b and 77c are connected to the upper surface of the outer skin 42, and the front surfaces of the side walls 77b and 77c are connected to the rear surface of the first core member 45 extending in the vertical direction. A flat portion 45a which is not a corrugated sheet is formed at the end of the first core member 45 in the vehicle width direction, and a flat reinforcing plate 78 is superimposed on the front surface of the flat portion 45a (see FIG. 11). The rear end of the partition plate 51 that divides the inside of the side sill portion 15 into the upper space and the lower space is connected to the front surface of the reinforcing plate 78 (see FIGS. 10 and 11).

An upper surface of the pair of side wall portions 77 b and 77 c of the reinforcing member 77, an upper edge of the flat portion 45 a of the first core member 45, and a peak portion of a rear end of the zigzag impact absorbing member 55 disposed inside the side sill portion 15. A connecting plate 79 formed in an L shape in plan view is connected from above to the notch 55a obtained by cutting the top of the (see FIGS. 9 to 11). A connecting plate 79 extending to the inside of the side sill 15 connects the inner surface of the outer skin 42 constituting the rear wall of the side sill 15 and the inner surface of the outer upper wall 15 c of the side sill 15.

Next, the operation of the first embodiment of the present invention having the above configuration will be described.

As shown in FIG. 1, the frame of the vehicle body of the automobile is composed of left and right front pillar lower portions 16 and 16, left and right side sills 15 and 15, left and right rear pillars 17 and 17, and a cross member portion 18. Between the upper end of the left and right center pillars 30, 30 and the upper end of the left and right center pillars 30, 30; Are connected in the vehicle width direction, the upper ends of the left and right front pillar lower portions 16, 16, the upper ends of the left and right center pillars 30, 30, and the left and right ends connected the upper ends of the left and right rear pillars 17, 17 in the front and rear direction Lower frame 4 because the upper frame 49 made of CFRP in a plan view H shape formed of the front pillars 32, 32 and the roof side rails 33, 33 is provided. And high strength in between the upper framework 49 can constitute a lightweight cabin.

Further, by supporting the collision load of the front collision or rear collision with the U-shaped lower frame 48 and the center pillars 30, 30 and the roof side rails 33, 33 of the upper frame 49, the thickness of the floor panel portion 12 can be increased. The side sill portion 15, not only can be made smaller and lighter but also supported by the side sill portions 15 and 15 of the lower skeleton 48 and the center pillars 30 and 30 and the roof arch 31 of the upper skeleton 49. The cross-sectional area of 15 can be reduced to reduce the weight.

Further, since the center pillars 30, 30 are connected to the side sill portions 15, 15 via the metal connection members 47, 47, when the collision load of the side collision is input to the side sill portions 15, 15, the metal connection member 47 , 47 can be plastically deformed due to ductility to absorb an impact, so that the center pillars 30, 30 can be prevented from falling to the passenger compartment side. Moreover, since the steering hanger support brackets 58, 58 connected to the front ends of the front pillars 30, 30 are provided on the upper portions of the front pillar lower portions 16, 16, the front pillar lower portion 16 is utilized using the steering hanger support brackets 58, 58. , 16 and the front pillars 30, 30 can be increased.

By the way, when the collision load of the rear collision is input to the rear bumper beam 36 at the rear of the vehicle, the collision load is transferred from the rear bumper beam 36 to the left and right metal rear frames 34, 34 via the crash rails 35, 35 on the left and right. It is transmitted. Further, since the damper housing 34c for supporting the upper end of the suspension damper 71 of the rear wheel is integrally formed on the rear frame 34, the load from the rear wheel is input to the damper housing 34c via the suspension damper 71.

Outer skin that constitutes the rear surface of the rear wall portion 14 of the floor 11, with three bolts 72 inserted from the rear to the front into the three recesses 34d formed in the front edge of the side wall portion 34a of the rear frame 34 The first flange 34e which is screwed with the nuts 73 inserted at the inner surfaces of the corners of both end portions in the vehicle width direction of 42 and which bends the lower front edge of the side wall portion 34a of the rear frame 34 forward, and the bottom wall of the rear frame 34 Of the outer skin 42 constituting the rear surface of the rear wall portion 14 of the floor 11, with three bolts 74 ... inserted from the rear to the front in the vicinity of the second flange 34f obtained by bending the front edge of the portion 34b forward. The rear frame 34 can be firmly fixed to the rear surface of the rear wall portion 14 by screwing with the nuts 75 inserted on the inner surfaces of the lower end portions in the vehicle width direction (see FIG. 8). When the collision load of the rear surface collision or the load from the rear wheel is input to the rear frame 34, the load is transmitted to the side sill portion 15 from the corner portions at both ends in the vehicle width direction of the rear wall portion 14 to be absorbed efficiently. Can.

Further, a plurality of inner ribs 34h and an outer rib 34i extending upward from the upper surface of the damper housing 34c are respectively formed on the inner and outer surfaces in the vehicle width direction of the rear frame 34, and the inner rib 34h and the outer rib 34i Since the upper end of ... is connected to the lower surface of the connecting member 37 (see FIGS. 7 and 8), the load of the rear wheel input to the damper housing 34c is transmitted from the connecting member 37 to the rear pillar portion 17, the cross member portion 18 and the rear end frame 38 It can be dispersed and absorbed.

Further, since the front end portion of the crash rail 35 extending forward from the rear bumper beam 36 fits into the recess 34 j of the rear frame 34, the front end where the crash rail 35 is connected to the rear frame 34 when the collision load of the rear collision is input. It is possible to prevent the part from bending and to crush the crush rail 35 surely to enhance the impact energy absorbing effect. At this time, a load room is formed at the rear of the rear frame 34, and the crush rail 35 is connected to the load room rear bottom wall 40. Therefore, the crash rail 35 is crushed together with the load room when a collision load of rear collision is input. The impact energy absorption effect can be further enhanced.

In addition, an L-shaped connection is formed to connect the outer skin 42 constituting the rear wall 14 and the inner skin 43 constituting the side sill 15 across the rear wall 14 to which the rear frame 34 is connected and the side sill 15. Since the plate 79 is disposed and the reinforcing member 77 is disposed in the lower portion of the rear wall portion 14 to which the rear frame 34 is connected (see FIGS. 9 to 11), the collision load of the rear collision is determined from the rear frame 34 to the rear wall It can be transmitted to the side sill portion 15 and the floor panel portion 12 through the portion 14, the connection plate 79 and the reinforcing member 77. Moreover, the inside of the side sill portion 15 is partitioned by the partition plate 51 into the upper space and the lower space, and the outer end in the vehicle width direction of the partition plate 51 is sandwiched between the bonding flanges 42a and 43a of the outer skin 42 and the inner skin 43 (FIG. Reference), it is possible to increase the strength of the side sill portion 15 against the collision load of side collision, front collision and rear collision while minimizing the increase in weight.

Next, a second embodiment of the present invention will be described based on FIGS. 12 to 22. FIG. The same description as that of the first embodiment will not be repeated.

Second embodiment

First, the structures of the front pillar lower portion 16 and the side sill portion 15 will be described in detail with reference to FIGS.

The outer skin of the side sill portion 15 extending in the horizontal direction and the outer shell of the front pillar lower portion 16 standing frontward and upward from the front end are formed by joining the outer skin 42 and the inner skin 43 by bonding flanges 42a and 43a, The inside of the side sill portion 15 is held between the outer skin 42 and the inner flange 43 of the inner skin 43 in the vehicle width direction by holding the outer edge in the vehicle width direction between the outer skin 42 and the inner skin 43 It is divided up and down by the made CFRP partition plate 51. The front part of the partition plate 51 extends inside the front pillar lower portion 16, and the joint flange 51a at the front end thereof is joined to the front wall 16a of the front pillar lower portion 16 (see FIGS. 16 and 17). The upper half of the side sill portion 15 constituted by the inner skin 43 has an inner upper wall 15b on the inner side in the vehicle width direction and an outer upper wall 15c on the outer side in the vehicle width direction across the step 15a. The height is higher than the height of the outer upper wall 15c (see FIGS. 19C and 19D).

A reinforcing member 52 made of CFRP is disposed inside the front pillar lower portion 16. The reinforcing member 52 is an L-shaped reinforcing member 52 formed in an L-shape in a side view, and is a member having a hat-shaped cross section that opens forward and downward. The width in the vehicle width direction is the width of the front pillar lower portion 16 in the vehicle width direction. It is formed smaller than the width (see FIGS. 18 and 19A to 19D). The front joint flanges 52a and 52a of the reinforcing member 52 are joined to the rear surface of the front wall 16a of the front pillar lower portion 16, and the rear wall 52b of the reinforcing member 52 is connected to the front surface of the rear wall 16b of the front pillar lower portion 16. The lower joint flanges 52c and 52c of the reinforcement member 52 are joined to the upper surface of the partition plate 51 of the side sill portion 15, and the upper wall 52d of the reinforcement member 52 is connected to the lower surface of the inner upper wall 15b of the side sill portion 15 (FIG. A) to (D)). At this time, the front joint flanges 52 a and 52 a of the reinforcing member 52 face the rear end of the upper member 26 across the front wall 16 a of the front pillar lower portion 16.

An inner bulkhead 53 made of CFRP, which has a triangular shape in a plan view, is disposed horizontally on the inner side in the vehicle width direction with respect to the reinforcing member 52 at the front end of the side sill portion 15 (see FIGS. 18 and 19B). The joint flange 53 a obtained by bending the outer periphery of the inner bulkhead 53 downward is connected to the rear surface of the front wall 16 a of the front pillar lower portion 16, the inner wall 52 e of the reinforcing member 52 and the inner wall 15 d of the side sill portion 15.

An outer bulkhead 54 made of CFRP, which has a trapezoidal shape in a plan view, is horizontally disposed outside the reinforcing member 52 at the front end of the side sill portion 15 in the vehicle width direction (FIGS. 18 and 19B to 19D) )reference). The bonding flange 54 a obtained by bending the outer periphery of the outer bulkhead 54 downward is connected to the outer wall 52 f of the reinforcing member 52 and the outer wall 15 e of the side sill portion 15. The inner bulkhead 53 is disposed slightly higher than the outer bulkhead 54.

In a space above the partition plate 51 of the side sill portion 15, a CFRP impact absorbing member 55 bent in a zigzag in a side view is disposed (see FIGS. 16 and 17). The upper end of the shock absorbing member 55 is connected to the lower surface of the inner upper wall 15b of the side sill portion 15, and the lower end of the shock absorbing member 55 is connected to the upper surface of the partition plate 51. The notch 55a ... which notched the edge part is connected to the lower surface of the outer upper wall 15c of the side sill part 15 (refer FIG. 16). However, only the notch 55b of the frontmost peak portion of the shock absorbing member 55 is connected to the lower surface of the outer bulkhead 54 (see FIGS. 16 and 19C).

A load transfer member 56 formed in a pipe shape having a trapezoidal cross section by CFRP is sandwiched between the outer skin 42 and the inner skin 43 at a portion below the partition plate 51 of the side sill portion 15 and connected to the floor panel 12. To be arranged (see FIGS. 17 and 19C and 19D).

Four nuts 57 are inserted on both sides of the reinforcing member 52 in the rear wall 16b of the front pillar lower portion 16 in the vehicle width direction, and four nuts penetrating the steering hanger support bracket 58 abutting on the rear surface of the rear wall 16b. The steering hanger support bracket 58 is fixed to the front pillar lower portion 16 by screwing the bolts 59 to the nuts 57 (see FIGS. 17 and 19A). Then, the steering hanger 60 is fixed so as to connect the left and right steering hanger support brackets 58.

Next, the structure around the floor tunnel 28 and the cross member 29 will be described in detail with reference to FIGS. 14, 15 and 20-22.

In the floor panel portion 12, the outer skin 42 and the inner skin 43 are separated with a predetermined distance, and the core member 44 is sandwiched therebetween. However, at the portion of the floor tunnel 28 that bulges upward from the floor panel portion 12, the outer skin 42 and the inner skin 43 overlap each other. Further, the outer skin 42 and the inner skin 43 locally bulge upward and overlap each other at a portion below the cross member 29 and along the outer side in the vehicle width direction of the floor tunnel 28, and a recess recessed upward there 12a, 12a are formed (see FIGS. 20 and 21). Four nuts 61 are inserted in each recess 12a, and each of four bolts 63 penetrates both ends of a steel plate tunnel brace 62F which bridges the open bottom surface of the floor tunnel 28 in the vehicle width direction. Are screwed onto the nuts 61, whereby the tunnel brace 62F is fixed to the floor panel portion 12. The tunnel brace 62F made of a strip-like steel plate is a member whose cross section is bent in a wavelike manner, and is accommodated in the concave portions 12a and 12a of the floor panel portion 12.

The CFRP cross member 29 is a member having a hat-shaped cross section whose lower surface is open, and includes a front wall 29a, an upper wall 29b, a rear wall 29c, front and rear joint flanges 29d and 29d, and a joint flange 29e on the inner side in the vehicle width direction. The front and rear joint flanges 29d and 29d are connected to the upper surface of the inner skin 43 of the floor panel 12, and the joint flange 29e on the inner side in the vehicle width direction is connected to the side wall 28a of the floor tunnel 28 (see FIGS. 20 and 21). When the cross member 29 is fixed to the floor panel portion 12, the recessed portions 12a of the floor panel portion 12, the nuts 61, and the bolts 63,.

The inclination angle θ1 to the rear with respect to the vertical line of the front wall 29a of the cross member 29 is set larger than the inclination angle θ2 to the front with respect to the vertical line of the rear wall 29c. The front portion of the seat 64 is fixed to the cross member 29 by screwing bolts 65, 65 passing through 64a into nuts 66, 66 inserted into the front wall 29a (see FIG. 21).

A rear tunnel brace 62R having the same structure as that of the front tunnel brace 62F is fixed to the floor tunnel 28 behind the front tunnel brace 62F by a similar fixing structure (see FIG. 15). The rear side tunnel brace 62R is provided in the vicinity of the in-vehicle component storage recess 12b which is formed at the rear of the floor panel portion 12 and is recessed upward.

In FIG. 22, the inner skin 43 is removed from the floor panel 12 to expose the core members 44. Each of the left and right core members 44 is a corrugated member having a large number of uneven portions 44a, and the uneven portions 44a extend in the vehicle width direction through the middle in the front-rear direction of the front and rear tunnel braces 62F and 62R. It is formed symmetrically on both sides of L. That is, in front of the line L, the concavo-convex portions 44a are formed concentrically centering on the front portion of the side sill portion 15, and the concentric circles shift to parallel lines extending in the front-rear direction on the vehicle body front side. Similarly, at the rear of the line L, the concavo-convex portions 44a are formed concentrically around the rear of the side sill portion 15, and the concentric circles shift to parallel lines extending in the front-rear direction on the vehicle rear side. The front concentric circles and the rear concentric circles cross in a V shape on the line L, and these V-shapes spread toward the front tunnel brace 62F and the rear tunnel brace 62R.

Next, the operation of the second embodiment of the present invention having the above configuration will be described.

When the vehicle makes an offset frontal collision, the collision load is input from the front side frame 20 to the front pillar lower portion 16 of the floor 11 via the damper housing 19. At this time, in the internal space from the front pillar lower portion 16 to the front portion of the side sill portion 15, a reinforcing member having a hat-shaped cross section formed in an L shape seen in the vehicle width direction and opening forward and downward Since the reinforcing member 52 is connected to the front wall 16a and the rear wall 16b of the front pillar lower portion 16 and connected to the inner upper wall 15b of the side sill portion 15 and the partition plate 51 (FIGS. 16 and 19 (A The front pillar lower portion 16 can efficiently transmit the collision load to the side sill portion 15 and disperse the collision load on the floor panel portion 12 without falling backward. Moreover, since the partition plate 51 can be extended to the front end of the side sill portion 15 without interfering with the reinforcing member 52, the strength of the side sill portion 15 against the collision load of the side collision can be enhanced.

Although the collision load of the offset frontal collision is input from the lower member 27 to the upper portion of the front pillar lower portion 16 via the upper member 26, the reinforcing member 52 faces the rear of the upper member 26, so the collision input to the upper member 26 The load can be effectively transmitted to the side sill portion 15 through the reinforcing member 52.

In addition, since the outer edge of the partition plate 51 in the vehicle width direction is sandwiched between the bonding flanges 42a and 43a of the outer skin 42 and the inner skin 43, and the inner edge of the partition plate 51 in the vehicle width direction is connected to the inner wall 15d of the side sill portion 15 (see FIG. 19 (C) (see (D)), when a collision load of a side collision is input to the side sill portion 15, the collision load from the outer wall 15e of the side sill portion 15 through the partition plate 51 and the inner wall 15d Can be transmitted to

In addition, since a pipe-shaped load transfer member 56 extending in the front-rear direction is disposed at the boundary between the floor panel portion 12 and the side sill portion 15 (see FIGS. 19C and 19D) When it inputs, it can prevent that the side sill part 15 falls with respect to the floor panel part 12. FIG. Moreover, since the shock absorbing member 55 bent in a zigzag manner is disposed in the upper space behind the reinforcing member 52 of the side sill portion 15 (see FIGS. 16 and 17), the impact load of the side collision input to the side sill portion 15 is an impact It can be absorbed by the absorbing member 55.

Also, since the steering hanger support bracket 58 for supporting the steering hanger 60 is fixed by bolts 59 and nuts 57 on both sides in the vehicle width direction of the connection portion with the reinforcing member 52 in the rear wall 16b of the front pillar lower portion 16 The steering hanger 60 can be firmly fixed to the front pillar lower portion 16 (see FIG. 19A).

Further, an inner bulkhead 53 extending in the horizontal direction is disposed between the inner wall 15 d of the side sill portion 15 and the reinforcing member 52, and an outer bulkhead extending in the horizontal direction between the outer wall 15 e of the side sill portion 15 and the reinforcing member 52 54, and since the front bulkhead 16a of the front pillar lower portion 16 and the inner topwall 15b and outer topwall 15c of the side sill portion 15 are connected by the inner bulkhead 53 and the outer bulkhead 54 (FIG. 19C) (See (D)) The collision load of the frontal collision can be transmitted from the front pillar lower portion 16 to the side sill portion 15 through the inner bulkhead 53 and the outer bulkhead 54.

Further, the outer skin 42 and the inner skin 43 are directly superposed on both sides in the vehicle width direction of a portion where the floor tunnel 28 rises upward from the floor panel portion 12 of the floor 11, and fitted in the concave portions 12a and 12a formed in the superposed portion Tunnel braces 62F and 62R, and both ends in the vehicle width direction of the tunnel braces 62F and 62R are fastened to the recessed portions 12a and 12a with bolts 63 ... and nuts 61 ... (see FIG. 21). While preventing the 62R from protruding downward from the floor panel 12 to ensure the minimum ground clearance of the vehicle body, the tunnel braces 62F and 62R are brought close to the center of the floor panel 12 in the thickness direction, and the collision load of the side collision is When the floor panel part 12 is input, the collision load is tunnel brace 62F To effectively support it is possible to prevent collapse of the floor tunnel 28 at 62R.

Further, since the tunnel braces 62F and 62R are plate members that bend in a wave shape when viewed in the vehicle width direction (see FIG. 21), the strength of the tunnel braces 62F and 62R can be increased against the collision load of the side collision. In addition, in the recesses 12a and 12a in which the tunnel braces 62F and 62R are fastened, not only the lower outer skin 42 bulges upward, but the upper inner skin 43 also bulges upward, so the recesses 12a and 12a are increased accordingly. Can be made deeper to increase the vertical thickness of the tunnel braces 62F and 62R and to increase the strength against the collision load of the side collision.

Further, since the upper surfaces of the concave portions 12a and 12a to which the front side tunnel brace 62F is fastened are covered by the cross member 29 (see FIG. 21), the inner skin 43 is raised upward to form the concave portions 12a and 12a. Not only the reduction of the cabin space is avoided, but also the load input to the concave portions 12a, 12a can be dispersed and absorbed in the cross member 29. Moreover, the cross member 29 is a CFRP member having a front wall 29a, an upper wall 29b and a rear wall 29c and an open lower surface, and the front wall having a larger inclination angle θa with respect to the vertical direction than the inclination angle θb of the rear wall 29c. Since the nut 66 for fastening the seat 64 is inserted to 29a, the area of the front wall 29a is increased to facilitate the attachment of the seat 64, and the front wall 29a is strengthened against the collision load in the longitudinal direction. be able to.

Further, since the rear side tunnel brace 62R is disposed in the vicinity of the in-vehicle component storage recess 12b formed in the rear of the floor panel 12 (see FIG. 15), the floor panel whose strength is reduced by forming the in-vehicle component storage recess 12b. The section 12 can be reinforced with a tunnel brace 62R on the rear side.

Further, the core member 44 of the floor panel 12 is a CFRP corrugated plate having a large number of concavo-convex parts 44a extending in a ripple shape, and the concavo-convex parts 44a are the middle of the front and rear tunnel braces 62F and 62R in the front-rear direction Since it has an apex on the line L extending in the vehicle width direction through the position and spreads toward the front and rear tunnel braces 62F and 62R (see FIG. 22), one side of the floor panel 12 in the vehicle width direction The collision load of the side collision input to the side is transmitted to the front and rear tunnel braces 62F and 62R via the uneven portions 44a of the core member 44 on one side in the vehicle width direction, and the core on the other side in the vehicle width direction By transmitting to the material 44, it is possible to disperse and absorb the collision load of the side collision throughout the floor panel portion 12.

As mentioned above, although embodiment of this invention was described, this invention can perform various design changes in the range which does not deviate from the summary.

For example, although each member is made of CFRP in the embodiment, any fiber reinforced resin such as GFRP (glass fiber reinforced resin) can be adopted.

Further, although two tunnel braces 62F and 62R are provided in the embodiment, the number of tunnel braces is not limited to two.

Further, the seat fastening seat of the present invention is not limited to the nuts 66 and 66 of the embodiment.

Claims (34)

1. A vehicle body formed by combining a lower outer skin (42) and an upper inner skin (43) comprises a floor panel (12) and a front wall standing up from the front end of the floor panel (12). (13), a rear wall (14) standing from the rear end of the floor panel (12), and left and right side sills (15) standing from the outer end of the floor panel (12) in the vehicle width direction The left and right front pillar lower portions (16) connecting the front wall portion (13) and the left and right side sill portions (15) are connected with the rear wall portion (14) and the left and right side sill portions (15) It comprises: left and right rear pillars (17); and a cross member (18) extending in the vehicle width direction along the upper ends of the rear wall (14) to connect the upper ends of the left and right rear pillars (17). Body structure of car There is,
   The left and right front pillar lower portions (16), the left and right side sill portions (15), the left and right rear pillars (17), and the cross member portion (18) are U-shaped CFRP made of CFRP in a plan view. Make up the lower skeleton (48),
   Left and right center pillars (30) standing from the longitudinal center of the left and right side sill portions (15), and a roof arch (31) connecting between upper ends of the left and right center pillars (30) in the vehicle width direction; Left and right upper front and rear frames (32, 33) connecting the upper ends of the left and right front pillar lower portions (16), the upper ends of the left and right center pillars (30), and the upper ends of the left and right rear pillars (17) in the front and rear direction And an upper frame (49) of a hollow cross section made of CFRP having a H-shape in plan view, and an automobile body structure of an automobile.
2. The vehicle body structure of an automobile according to claim 1, wherein the center pillar (30) is connected to the side sill portion (15) through a metal connection member (47).
3. A metal rear frame (34) integrally formed with a rear wheel damper housing (34c) is connected to the rear surface of the rear pillar (17) which is inclined upward and rearward. The vehicle body structure of the motor vehicle according to claim 1 or 2.
4. An L-shaped first flange (34e) obtained by bending the lower part of the rear edge of the rear frame (34) in the vehicle width direction forward and a second flange (34f) obtained by bending the lower edge of the rear frame (34) forward And the first and second flanges (34e, 34f) are connected to the corner portions of the outer lower end of the outer skin (42) constituting the rear wall portion (14) in the vehicle width direction. The vehicle body structure of an automobile according to claim 3.
5. The rear frame (34) has a pair of left and right hollow crash rails (35) extending rearward from the rear surface of the rear frame (34), and the front end of the crash rail (35) fits in a recess (34j) formed in the rear frame (34) A vehicle body structure of a car according to claim 3 or 4, characterized in that:
6. The outer skin (42) and the side sill constituting the rear wall (14) straddling the side sill (15) from the rear wall (14) to which the rear frame (34) is connected An automobile according to any one of claims 3 to 5, characterized in that an L-shaped connecting plate (79) for connecting the inner skins (43) constituting (15) is disposed. Body structure.
7. The inside of the side sill portion (15) is divided into upper space and lower space by a partition plate (51), and the outer end in the vehicle width direction of the partition plate (51) is made of the outer skin (42) and the inner skin (43) The vehicle body structure of an automobile according to any one of claims 1 to 6, characterized in that it is sandwiched between the joining flanges (42a, 43a).
8. A steering hanger support bracket (58) connected to a front end of the upper front and rear frames (32, 33) is provided on the upper portion of the front pillar lower portion (16). The vehicle body structure of the motor vehicle according to any one of the above.
9. An insert member (73) is provided on the back surface of the outer skin (42) which forms the corner portions at both ends of the rear wall portion (14) in the vehicle width direction, and the damper housing (34c) of the rear wheel is integrally formed The vehicle body structure of an automobile according to claim 1, wherein a mounting portion at a front portion of the rear frame (34) is fastened to the insert member (73) with a bolt (72).
10. 10. The vehicle body of an automobile according to claim 9, wherein a plurality of inner ribs (34h) extending upward from the upper surface of said damper housing (34c) are formed on the inner surface in the vehicle width direction of said rear frame (34). Construction.
11. A rear end frame (38) extending rearward and downward from an upper end of the rear pillar portion (17), the connection portion of the rear pillar portion (17) and the rear end frame (38) is reinforced with a connecting member (37) 11. The vehicle body structure of an automobile according to claim 10, wherein the upper end of (34h) is connected to the connection member (37).
12. An outer rib (34i) facing the inner rib (34h) is formed on the outer surface of the rear frame (34) in the vehicle width direction, and the upper end of the outer rib (34i) is connected to the connection member (37) The vehicle body structure of an automobile according to claim 11, characterized by
13. An L-shaped first flange (34e) obtained by bending the lower part of the rear edge of the rear frame (34) in the vehicle width direction forward and a second flange (34f) obtained by bending the lower edge of the rear frame (34) forward And the first and second flanges (34e, 34f) are connected to the corner portions of the outer lower end of the outer skin (42) constituting the rear wall portion (14) in the vehicle width direction. An automobile body structure according to any one of claims 9 to 12.
14. The rear frame (34) has a pair of left and right hollow crash rails (35) extending rearward from the rear surface of the rear frame (34), and the front end of the crash rail (35) fits in a recess (34j) formed in the rear frame (34) The vehicle body structure of an automobile according to any one of claims 9 to 13, characterized in that:
15. The outer skin (42) and the side sill constituting the rear wall (14) straddling the side sill (15) from the rear wall (14) to which the rear frame (34) is connected An automobile according to any one of claims 9 to 14, characterized in that an L-shaped connecting plate (79) connecting the inner skins (43) constituting (15) is disposed. Body structure.
16. The inside of the side sill portion (15) is divided into upper space and lower space by a partition plate (51), and the outer end in the vehicle width direction of the partition plate (51) is made of the outer skin (42) and the inner skin (43) The vehicle body structure of an automobile according to any one of claims 9 to 15, characterized by being sandwiched between the joining flanges (42a, 43a).
17. The reinforcement member (77) is disposed in the lower part of the rear wall (14) to which the rear frame (34) is connected, according to any one of claims 9 to 16, Car body structure of the car.
18. A vehicle body structure according to claim 14, characterized in that a cargo compartment is formed behind the rear frame (34) and the crush rail (35) is connected to the bottom wall (40) of the cargo compartment. .
19. An inner space extending from the front pillar lower portion (16) to the front portion of the side sill portion (15) has a hat-like cross section formed in an L shape as viewed in the vehicle width direction and opening forward and downward. A reinforcing member (52) is disposed, and the inside of the side sill portion (15) is divided into an upper space and a lower space by a partition plate (51), and the reinforcing member (52) is a front wall of the front pillar lower portion (16) Vehicle body according to claim 1, characterized in that it is connected to (16a) and the rear wall (16b) and connected to the upper wall (15b) of the side sill portion (15) and the partition plate (51). Construction.
20. The upper member (26) extends forward from the front wall (16a) of the front pillar lower portion (16), and the reinforcing member (52) faces the rear of the upper member (26). The vehicle body structure of the automobile according to claim 19.
21. 21. The vehicle according to claim 19, wherein the outer edge of the partition plate (51) in the vehicle width direction is held between the outer skin (42) and the joint flange (42a, 43a) of the inner skin (43). Body structure of the car described in.
22. 22. The vehicle body of an automobile according to any one of claims 19 to 21, characterized in that an inner edge in a vehicle width direction of the partition plate (51) is connected to an inner wall (15d) of the side sill portion (15). Construction.
23. The pipe-like load transfer member (56) extending in the front-rear direction is disposed at the boundary between the floor panel portion (12) and the side sill portion (15). The vehicle body structure of the automobile according to item 1.
24. The shock absorbing member (55) which is bent in a zigzag manner is disposed in the upper space behind the reinforcing member (52) of the side sill portion (15). The vehicle body structure of an automobile according to any one of the items 1 to 4.
25. The mounting seat (61) for fixing a steering hanger (60) was provided in the vehicle width direction both sides of the connection part with the said reinforcement member (52) in the rear wall (16b) of the said front pillar lower part (16) An automobile body structure according to any one of claims 19 to 24, characterized in that.
26. An inner bulkhead (53) extending horizontally is disposed between the inner wall (15d) of the side sill portion (15) and the reinforcing member (52), and the outer wall (15e) of the side sill portion (15) and the above A horizontally extending outer bulkhead (54) is disposed between the reinforcing member (52) and the front wall of the front pillar lower portion (16) with the inner bulkhead (53) and the outer bulkhead (54). The vehicle body structure of an automobile according to any one of claims 19 to 25, characterized in that (16a) and the upper wall (15b, 15c) of the side sill portion (15) are connected.
27. A floor tunnel (28) having an opening opening downward and extending in the front-rear direction is formed at the center of the floor panel portion (12) in the vehicle width direction, and the opening of the floor tunnel (28) is formed in the vehicle width direction The outer skin (42) bulges upward at a portion where the floor panel (12) is continuous with the floor tunnel (28), and the inner skin (43) is bridged by a tunnel brace (62F, 62R) extending to the And a tunnel brace fastening seat (12a) for fastening the tunnel brace (62F, 62R) to the lap portion of the outer skin (42) and the inner skin (43). The vehicle body structure of an automobile according to claim 1.
28. 28. The vehicle body structure of an automobile according to claim 27, wherein said tunnel braces (62F, 62R) are plate members that bend in a wave shape when viewed in the vehicle width direction.
29. Vehicle body structure according to claim 27 or 28, characterized in that the inner skin (43) bulges upwards in the tunnel brace fastening seat (12a).
30. 30. A motor vehicle according to any one of claims 27 to 29, characterized in that the tunnel brace fastening seat (12a) is covered by a cross member (29) joined to the upper surface of the inner skin (43). Body structure.
31. The cross member (29) is a fiber reinforced resin member having a front wall (29a) and a rear wall (29c) and the lower surface opened, and the inclination angle with respect to the vertical direction is the inclination angle of the rear wall (29c) 31. A vehicle body structure according to claim 30, characterized in that a seat fastening seat (66) for fastening a seat (64) is formed on the front wall (29a) which is larger than the front wall (29a).
32. A pipe-shaped load transfer member (56) extending in the front-rear direction is disposed at the boundary between the floor panel (12) and the side sill (15) connected to the outer side in the vehicle width direction. An automobile body structure according to any one of claims 27 to 31.
33. The tunnel braces (62F, 62R) on the front side and the rear side are provided, and the tunnel braces (62R) on the rear side are disposed in the vicinity of the in-vehicle component storage recess (12b) formed in the rear of the floor panel portion (12). A vehicle body structure of a motor vehicle according to any one of claims 27 to 32, characterized in that.
34. The core member (44) is made of a fiber reinforced resin corrugated sheet having a large number of uneven portions (44a) extending like ripples, and the uneven portions (44a) are tunnel braces (62F, 62R) on the front side and the rear side. 34, characterized in that it has an apex on a line extending in the vehicle width direction through an intermediate position in the longitudinal direction of the wheel, and is expanded toward the front and rear tunnel braces (62F, 62R) Body structure of the car described.

Images