JP4788539B2 - Body panel structure - Google Patents

Description

  The present invention relates to a vehicle body panel structure.

2. Description of the Related Art An automobile resin floor structure is known in which reinforcing fibers are disposed between a core material such as a honeycomb and a surface layer (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 4-193691 JP 2005-225364 A

  However, the conventional technology as described above does not describe the load from the side, and there is room for improvement in this respect.

  In view of the above fact, an object of the present invention is to obtain a vehicle body panel structure capable of effectively transmitting an input load from one end side to the other end side.

To achieve the above object, a vehicle body panel structure according to the first aspect of the present invention is composed of a material including fiber reinforced plastic, and includes a first skeleton member extending in the longitudinal direction of the vehicle body and a material including fiber reinforced plastic. A plurality of second skeleton members each extending in the vehicle width direction and having an inner end in the vehicle width direction abutted against the first skeleton member, and a material including fiber reinforced plastic, A plurality of third skeleton members each extending in the vehicle width direction and having an outer end in the vehicle width direction abutted against the first skeleton member, the first skeleton member, the second skeleton member, and the third skeleton member A pair of panel members sandwiched from both sides of the vehicle body in the vertical direction, and the vehicle width direction outer ends of the plurality of second skeleton members are respectively the vehicle width direction outer ends of the vehicle floor portion. Extending in the direction A vehicle width direction inner end of the plurality of third skeleton members extends in the vehicle width direction inner end of the vehicle floor portion in the vehicle longitudinal direction. It is arranged to transmit the load in the vehicle width direction to the tunnel part .

In the vehicle body panel structure according to claim 1 , for example, when a load inward in the vehicle width direction is input from an outer end in the vehicle width direction of (a part of) the plurality of second skeleton members, Is distributed in the longitudinal direction of the vehicle body and transmitted to the plurality of third skeleton members. At this time, since the pair of panel members sandwich the first to third skeleton members from the vertical direction of the vehicle body, they are displaced in the vertical direction of the vehicle body and the load transmission path becomes discontinuous (out-of-plane deformation). Is prevented. As a result, in the present vehicle body panel structure, in a configuration including a fiber reinforced plastic that is a brittle material, for example, a load that is locally input to the outer end side in the vehicle width direction is effective while dispersing the load. Can be transmitted to the inner end side in the vehicle width direction.

Thus, in the vehicle body panel structure according to claim 1, wherein, it is possible to effectively transmit the input load from one end to the other end. Note that another member capable of transmitting a load may be interposed between the first member and the second or third member. In other words, such other members can be grasped as a part of the first to third members.

Moreover, this vehicle body panel structure comprises the vehicle body floor part, for example, when the inward load of the vehicle width direction is input into the rocker, this load is the 2nd frame member, the 1st frame member, the 3rd frame. It is possible to effectively transmit and disperse through the member to the tunnel portion (via the further rocker on the opposite side).

The vehicle body panel structure according to a second aspect of the present invention is the vehicle body panel structure according to the first aspect , wherein the plurality of second skeleton members are arranged more densely in the vehicle longitudinal direction than the plurality of third skeleton members. Yes.

In the vehicle body panel structure according to claim 2, since the second skeleton member that is located on the outer side in the vehicle width direction and to which a load is easily input from the outside is arranged more densely than the third skeleton member, the load that is locally input Can be received by the second skeleton member, and by placing the third skeleton member mainly for load transmission sparsely, the overall weight can be reduced while ensuring the function of distributing the locally input load. Can be planned. The distance between the second skeleton members in the longitudinal direction of the vehicle body is preferably smaller than, for example, the size of the assumed collision body, and even when the second skeleton members adjacent in the longitudinal direction of the vehicle body are brought into contact with each other in the longitudinal direction of the vehicle body ( The interval may be 0).

The vehicle body panel structure according to a third aspect of the present invention is the vehicle body panel structure according to the first or second aspect , wherein each of the pair of panel members is made of a material containing fiber reinforced plastic.

In the vehicle body panel structure according to the third aspect , since the pair of panel members are made of a material containing fiber reinforced plastic, the weight can be reduced.

The vehicle body panel structure according to a fourth aspect of the present invention is the vehicle body panel structure according to any one of the first to third aspects, wherein one or both of the second skeleton member and the third skeleton member are fiber reinforced. The fiber which comprises a plastic has the vehicle width orientation layer by which it is orientated along the vehicle width direction.

In the vehicle body panel structure according to claim 4 , since the fibers are oriented along the main load transmission direction in the vehicle width orientation layer of the second or third skeleton member, the fiber orientation of the fiber orientation having pseudo isotropic property with the same mass. Compared with the configuration, the yield strength against the vehicle width direction load is improved. In other words, in this vehicle body panel structure, it is possible to reduce the weight while securing the equivalent strength as compared with the fiber orientation configuration having pseudo-isotropic properties.

The vehicle body panel structure according to claim 5 is the vehicle body panel structure according to any one of claims 1 to 4 , wherein one or both of the second frame member and the third frame member are fiber reinforced. The fiber which comprises a plastic has the inclination alignment layer in which it inclines and orientates only the predetermined angle with respect to the vehicle width direction.

In the vehicle body panel structure according to claim 5 , since the fibers are oriented at an inclination with respect to the vehicle width direction that is the main load transmission direction in the inclined orientation layer of the second or third skeleton member, depending on the orientation direction of the fibers. Thus, the load can be transmitted and distributed in the required direction in the vehicle width direction and in the vehicle longitudinal direction.

The vehicle body panel structure according to claim 6 is the vehicle body panel structure according to any one of claims 1 to 5 , wherein one or both of the second skeleton member and the third skeleton member are fiber reinforced. The fibers constituting the plastic have a cross-orientation layer that is oriented so as to cross while being inclined at a predetermined angle with respect to the vehicle width direction.

In the vehicle body panel structure according to claim 6 , since the fibers are oriented so as to incline and intersect with respect to the vehicle width direction which is the main load transmission direction in the inclined orientation layer of the second or third skeleton member. Depending on the orientation direction, the load can be more effectively transmitted and distributed in the required direction in the vehicle width direction and in the vehicle longitudinal direction.

A vehicle body panel structure according to a seventh aspect of the present invention is the vehicle body panel structure according to the fifth or sixth aspect , wherein one or both of the second skeleton member and the third skeleton member are at least a surface layer facing the vehicle body vertical direction. Is the inclined alignment layer or the cross-alignment layer, and the pair of panel members have fibers in the same direction as the inclined alignment layer or the cross-alignment layer at least on the surfaces of the second skeleton member and the third skeleton member. It is comprised with the fiber reinforced plastic comprised by orienting.

In the vehicle body panel structure according to claim 7 , the orientation of the fibers is the same in the inclined orientation layer or the cross orientation layer of the second or third skeleton member and the surface (surface layer) of the pair of panel members sandwiching them. Therefore, the load transmission between the second or third skeleton member and the pair of panel members is effectively performed, and the load dispersed in the inclined orientation layer or the cross orientation layer is more widely dispersed in the vehicle body. Can do.

The vehicle body panel structure according to an eighth aspect of the present invention is the vehicle body panel structure according to any one of the first to seventh aspects, wherein at least two of the plurality of second skeleton members are arranged on the second skeleton member. Each of the vehicle seats has an outer mounting portion in the vehicle width direction, and the at least two outer mounting portions are connected by a seat frame member.

In the vehicle body panel structure according to claim 8 , since the two outer mounting portions are connected by the seat frame member extending in the vehicle longitudinal direction, load distribution in the vehicle longitudinal direction by the seat frame member is also achieved. . It is also possible to transmit the load input to the outer seat frame member to the inner seat fixing portion (vehicle body structure portion) via the vehicle seat.

The vehicle body panel structure according to a ninth aspect of the present invention is the vehicle body panel structure according to the eighth aspect , wherein the first skeleton member, the second skeleton member, the third skeleton member, and the pair of panel members are formed of a vehicle body. Further provided are connecting members that are provided on both sides with respect to the center portion in the vehicle width direction, and that connect between the inner mounting portions in the vehicle width direction of the vehicle seat that are located on both sides with respect to the center portion in the vehicle width direction.

In the vehicle body panel structure according to claim 9, the load input to the outer seat skeleton member is directly transmitted to the opposite side to the central portion in the vehicle width direction via the vehicle seat, the inner mounting portion, and the connecting member. Can do. In particular, in the configuration in which the inner mounting portion is disposed so as to transmit the inward load in the vehicle width direction from the third skeleton member, the inward load in the vehicle width direction input to the second skeleton member in the vehicle width direction is It becomes possible to transmit to the opposite side to the connecting member, that is, the central portion in the vehicle width direction, through the skeleton member, the third skeleton member, and the inner attachment portion.

Body panel structure according to the invention of claim 1 0, wherein, in the vehicle body panel structure according to claim 9, wherein the inner mounting portion is provided in the vehicle width direction inner side with respect to said third frame member or said third frame member, A skeleton member of the vehicle seat is attached to the upper side in the vehicle body vertical direction with respect to the third skeleton member, and a fixing member to which the connection member is attached on the lower side of the vehicle body vertical direction with respect to the third skeleton member.

The vehicle body panel structure according to claim 1 0, wherein, since the fixing member fastening part positioned to overlap in the vertical direction of the vehicle body and the vehicle body longitudinal direction with respect to the third frame member, a vehicle width direction acts on the third frame member An inward load can be supported, and this load can be transmitted to the connecting member via the fixing member.

Body panel structure according to the invention of claim 1 1, wherein, in the vehicle body panel structure according to any one of claims 1 to 1 0, wherein the first frame member is a vehicle width direction outer end of the vehicle seat It has a recessed part which constitutes the laying route of piping which is arranged inside rather than the vehicle width direction, and extends in the body longitudinal direction.

The vehicle body panel structure according to claim 1 1, wherein, if the vehicle width direction inward load exceeding a predetermined value is input to the second frame member, the vehicle width direction outer side than the first frame member to distribute the load in the longitudinal direction of the vehicle body The second skeleton member located at the center is mainly deformed to absorb energy. Thereby, the installation range of the seat in the vehicle body is prevented from being deformed and a space is secured. And the pipe | tube in which at least one part entered into the recessed part of the 1st frame member is easy to protect, without deform | transforming.

Body panel structure according to the invention of claim 1 wherein, in the vehicle body panel structure according to any one of claims 1 to 1 1, a vehicle width direction outer end portion of the pair of panel members, the vehicle body respectively The overlapping portion extends upward in the vertical direction and overlaps with each other to form an overlapping portion, and the overlapping portion includes an inclined portion that is inclined such that the upper side in the vertical direction of the vehicle body is located on the outer side in the vehicle width direction from the lower side.

The vehicle body panel structure according to claim 1 wherein, the polymer portion of the pair of panel members is flared outward in the vehicle width direction inclined member located on the outer side in the vehicle width direction is misaligned in the vertical direction of the vehicle body Riding over the pair of panel members (each skeleton member) is effectively prevented by the overlapping portion. Thereby, a load is reliably transmitted to each skeleton member from the member located in the vehicle width direction outer side.

Body panel structure according to the invention of claim 1 3, wherein, in the vehicle body panel structure according to claim 1 wherein the inclined portion of the overlapping portion extends in the vehicle longitudinal direction in the vehicle width direction outer end of the vehicle floor section The pair of panel members and the rocker are arranged so as to overlap the vehicle body vertical direction and the vehicle width direction with respect to the inclined surface formed on the rocker so as to face the vehicle width direction inner side and the vehicle body vertical direction upper side. A cover panel that covers the vehicle from above and below in the vertical direction is further provided.

The vehicle body panel structure according to claim 1 3, wherein an inclined portion and a cover panel of the polymerization unit for forming a pair of panel members is, since it is arranged so as to sandwich the rocker in the vehicle body vertical direction, the rocker and a pair of panel members (Each skeleton member) is displaced in the vertical direction of the vehicle body and prevented from climbing up and down. Thereby, a load is more reliably transmitted to each frame member from the member located on the outer side in the vehicle width direction.

  As described above, the vehicle body panel structure according to the present invention has an excellent effect that the input load from one end side can be effectively transmitted to the other end side.

  A vehicle body floor structure 10 to which a vehicle body panel structure according to a first embodiment of the present invention is applied will be described with reference to FIGS. 1 to 17. First, a schematic overall configuration of a vehicle body B to which a vehicle body floor structure 10 as a vehicle body panel structure is applied will be described, and then a vehicle body floor structure 10 that is a main part of the present invention will be described in detail. In the figure, the arrow FR indicates the forward direction in the vehicle longitudinal direction, the arrow UP indicates the upward direction in the vehicle vertical direction, the arrow LH indicates the left side (vehicle width direction) when viewed in the traveling direction, and the arrow RH indicates the traveling direction. On the right side when viewed, the arrow IN indicates the inner side in the vehicle width direction, and the arrow OUT indicates the outer side in the vehicle width direction.

(Whole body structure)
FIGS. 11 and 12 are perspective views of the general vehicle body B to which the vehicle body floor structure 10 is applied as seen from different directions. As shown in these drawings, the vehicle body B includes a pair of left and right rockers 12 each having a length in the longitudinal direction of the vehicle body. The outer ends in the vehicle width direction of the floor panel 14 constituting the vehicle body floor F are joined to the left and right rockers 12 as vertical frame members. A floor tunnel 16 serving as a tunnel portion extending in the longitudinal direction of the vehicle body and opening downward in the vertical direction of the vehicle body is provided at the vehicle width direction center portion of the vehicle body floor F extending mainly in the vehicle body longitudinal direction and the vehicle width direction. The inner ends of the left and right floor panels 14 in the vehicle width direction are joined to the downward opening ends of the floor tunnel 16 in the vehicle body vertical direction.

  In addition, each rocker 12 has a front end 12A continuous with a lower end 18A of a front pillar 18 extending substantially along the vehicle body vertical direction. Although illustration is omitted, the left and right front pillars 18 extend in the vertical direction of the vehicle body as shown in FIG. 11, and hold the front windshield glass therebetween. Further, the left and right front pillars 18 are joined to different ends of the dash panel 20 in the vehicle width direction.

  The dash panel 20 extends in the vehicle width direction and the vehicle body vertical direction, and separates the compartment C from a space Rf (for example, an engine compartment) in front of the compartment C. A rear end portion of a pair of left and right front side members (not shown) is connected to the dash panel 20, and the front ends of the left and right front side members are bridged by a bumper reinforcement that constitutes a front bumper. ing. A notch 20A that opens the front end of the floor tunnel 16 to the front space Rf is formed at the center of the dash panel 20 in the vehicle width direction.

  On the other hand, the rear ends 12B of the left and right rockers 12 are continuous with the lower ends 22A of the center pillars 22 extending substantially along the vertical direction of the vehicle body. A rear side member 23 (see FIG. 12) is connected to the rear ends 12B and the center pillars 22 of the left and right rockers 12. Further, the left and right center pillars 22 are joined to different ends of the room partition panel 24 in the vehicle width direction.

  The room partition panel 24 extends in the vehicle width direction and the vehicle body vertical direction, and separates the vehicle compartment C from the space Rr behind the vehicle compartment C. A cutout portion 24A (see FIG. 12) that opens the rear end of the floor tunnel 16 to the rear space Rr is formed at the center of the room partition panel 24 in the vehicle width direction. That is, the floor tunnel 16 extends over the entire length of the vehicle body floor F in the longitudinal direction of the vehicle body, and is configured to open at both ends in the longitudinal direction of the vehicle body.

  As shown in FIG. 11, the vehicle body B includes a pair of left and right cross members 26 that are elongated in the vehicle width direction and are connected to the rocker 12 and the floor tunnel 16 on the upper side of the floor panel 14. In this embodiment, the cross member 26 is joined to the upper surface side of the floor panel 14 in the vertical direction of the vehicle body, and connects the front end portion of the rocker 12 and the floor tunnel 16 in the vehicle longitudinal direction.

  As shown in FIG. 11, the vehicle body floor structure 10 constituting the automobile body B includes a pair of left and right floor crosses 28 that connect the rear portions of the rocker 12 and the floor tunnel 16 in the vehicle body front-rear direction. The floor cloth 28 is formed in a rectangular shape in plan view extending in the vehicle width direction and the vehicle body longitudinal direction as a whole, and is fixedly disposed on the upper surface side of the floor panel 14 in the vehicle body vertical direction. More specifically, as shown in FIG. 13, the floor cross 28 is elongated in the longitudinal direction of the vehicle body, and a pair of left and right (left and right relative to the seated occupant) for supporting the vehicle seat S for occupant seating on the vehicle body floor F. The installation range of the seat rails 30 and 32 as the seat frame members provided, in other words, extends in a range substantially including the entire movable range of the vehicle seat S supported by the seat rails 30 and 32 so as to be slidable in the longitudinal direction of the vehicle body. Exist.

  The automobile body B described above includes the locker 12, floor panel 14, floor tunnel 16, front pillar 18, dash panel 20, center pillar 22, room partition panel 24, cross member 26, and floor cloth 28, which are the main components. The main parts are each composed of carbon fiber reinforced plastic (hereinafter referred to as CFRP).

(Detailed structure of the car body floor structure)
Hereinafter, the vehicle body floor structure 10 including the floor cloth 28 as the vehicle body panel structure will be described in detail. First, the floor cloth 28 will be described, and then the relationship between the floor cloth 28 and other components will be described. Since the vehicle body floor structure 10 is basically configured symmetrically with respect to the floor tunnel 16, the vehicle body floor structure 10 on the left side will be described below, and different parts will be supplemented. When the left and right floor cloths 28 are distinguished, the floor cloth 28 located on the left side of the floor tunnel 16 is referred to as a floor cloth 28Lh, and the floor cloth 28 located on the right side of the floor tunnel 16 is referred to as a floor cloth 28Rh.

  FIG. 2 shows a perspective view of a single floor cloth 28Lh, and FIG. 1 shows an exploded perspective view of the floor cloth 28. As shown in these drawings, the floor cross 28Lh includes a longitudinal member 34Lh as a first frame member that is elongated in the longitudinal direction of the vehicle body, and a longitudinal member 34Lh that is elongated in the vehicle width direction and has an inner end 36A in the vehicle width direction. A plurality of EA cloths 36 as second skeleton members that are abutted against each other, and a plurality of horizontal crosses 38 as third skeleton members that are each elongated in the vehicle width direction and abutted at the outer end 38A in the vehicle width direction against the vertical member 34Lh. And a vertical member 34Lh, and a sandwich panel 40 sandwiching a plurality of EA cloths 36 and lateral crosses 38 from above and below in the vertical direction of the vehicle body.

  The vertical member 34Lh is made of CFRP, and as shown in FIG. 1, the rectangular lower portion is cut out in a substantially arc shape (the lower edge is formed in a substantially arc shape) in a cross-sectional view perpendicular to the longitudinal direction. It is configured as a solid structure (FRP block) having a recess 35 that opens downward in the vehicle body vertical direction. As a result, a fuel pipe 54 to be described later can be laid in the recess 35 of the vertical member 34Lh.

  As shown in FIG. 7, each EA cloth 36 is filled with foamed urethane foam U inside a CFRP outer shell H having a substantially rectangular closed cross section when viewed in a cross section perpendicular to the longitudinal direction (vehicle width). Both ends in the longitudinal direction of the outer shell H are open ends. In this embodiment, as shown in FIG. 1, the five EA crosses 36 are arranged in parallel in the longitudinal direction of the vehicle body while abutting the vehicle width direction inner end 36A against the vehicle width direction outer side surface 34A of the vertical member 34Lh. It is arranged without gaps in the direction. In this state, the position in the vehicle width direction of the outer end 36B in the vehicle width direction of each EA cross 36 is substantially matched (the length of each EA cross 36 is matched), and is disposed at the forefront in the vehicle body longitudinal direction. The positions of the front wall 36C of the EA cross 36 (the outer shell H) and the rear wall 36D of the EA cross 36 disposed last in the vehicle longitudinal direction are the positions of the front and rear ends 34B, 34C of the vertical member 34Lh in the vehicle longitudinal direction. It is almost matched.

  As shown in FIG. 8, each horizontal cloth 38 is filled with foamed urethane foam U inside an outer shell H made of CFRP having a substantially rectangular closed cross section when viewed in a cross section perpendicular to the longitudinal direction (vehicle width). Both ends in the longitudinal direction of the outer shell H are open ends. In this embodiment, as shown in FIGS. 1 and 3, the three horizontal crosses 38 abut the vehicle width direction outer end 38 </ b> A against the vehicle width direction inner side surface 34 </ b> D of the vertical member 34 </ b> Lh and are substantially equidistant in the vehicle longitudinal direction. Are arranged in parallel. In this state, the position in the vehicle width direction of the inner end 38B in the vehicle width direction of each horizontal cross 38 is substantially matched (the length of each horizontal cross 38 is matched), and is disposed at the forefront in the vehicle longitudinal direction. The positions of the front wall 38C of the lateral cross 38 (the outer shell H) and the rear wall 38D of the last lateral cross 38 arranged in the vehicle longitudinal direction are the positions of the longitudinal ends 34B and 34C of the vertical member 34Lh in the vehicle longitudinal direction. It is almost matched.

  Each of the EA cloths 36 and the horizontal cloths 38 has a vertically flat shape (substantially rectangular shape) in which the thickness dimension in the vertical direction of the vehicle body is smaller than the width dimension in the vehicle body longitudinal direction. Further, the width dimension of the EA cloth 36 and the horizontal cloth 38 are substantially equal to each other, and accordingly, the distance between the horizontal cloths 38 in the longitudinal direction of the vehicle body is substantially equal to the width dimension of the horizontal cloth 38. ing.

  As shown in FIGS. 1 and 3, the sandwich panel 40 is formed by joining a sandwich lower panel 42 as a pair of panel members and a sandwich upper panel 44. The sandwich lower panel 42 extends in the vehicle width direction and the longitudinal direction of the vehicle body, and has a flat bottom plate portion 42A that is substantially rectangular in a plan view, and is erected upward in the vehicle body vertical direction from the vehicle width direction outer end of the bottom plate portion 42A. An outer wall 42B, an inner wall 42C that is erected upward in the vehicle vertical direction from the vehicle width direction inner end of the bottom plate portion 42A, and an outer flange 42D that extends from the upper end of the outer wall 42B in the vehicle vertical direction. And an inner flange 42E extending inward in the vehicle width direction from the upper end of the inner wall 42C in the vehicle body vertical direction. In this embodiment, the outer flange 42D extends from the outer wall 42B outward in the vehicle width direction and upward in the vehicle body vertical direction, and is inclined with respect to the horizontal plane.

  Further, as shown in FIG. 1, the sandwich lower panel 42 constituting the floor cloth 28Lh has a bulging portion in which a part of the bottom plate portion 42A is raised and enters the concave portion 35 of the vertical member 34Lh (contacts and covers from the inside). 42F is formed. The bulging portion 42F is formed on the bottom plate portion 42A, which is longer in the longitudinal direction of the vehicle body than the vertical member 34Lh, over the entire length in the longitudinal direction of the vehicle body, and forms a recess 45 that opens at the lower end in the vertical direction of the vehicle body and at the front and rear ends in the longitudinal direction of the vehicle body. is doing.

  On the sandwich lower panel 42 described above, as shown in FIG. 1, the vertical members 34Lh, the EA crosses 36, and the horizontal crosses 38 arranged as described above are arranged in the vehicle width direction outer end 36B of each EA cross 36. Is abutted against the outer wall 42B, and the inner end 38B in the vehicle width direction of each lateral cross 38 is abutted against the inner wall 42C (see FIG. 5), and is disposed so as not to protrude from both sides in the longitudinal direction of the vehicle body. It is like that. In this state, in the floor cloth 28Lh, as shown in FIG. 5, the bulging portion 42F enters the concave portion 35 to form a space in which the fuel pipe 54 enters. Hereinafter, the portions of the bottom plate portion 42A that protrude from the front and rear ends 34B, 34C (front walls 36C, 38C, rear walls 36D, 38D) of the vertical member 34Lh in the vehicle body front-rear direction are referred to as front flange 42G and rear flange 42H, respectively. is there.

  As shown in FIG. 1, the sandwich upper panel 44 includes a flat top plate portion 44A that extends in the vehicle width direction and the vehicle body front-rear direction and has a substantially rectangular shape in plan view, and the vehicle body front-rear direction of the top plate portion 44A. A front wall 44B suspended from the front end, a rear wall 44C suspended from the rear end in the vehicle body front-rear direction of the top plate portion 44A, and a front flange 44D extending forward from the lower edge of the front wall 44B in the vehicle front-rear direction. The rear flange 44E extending rearward in the vehicle longitudinal direction from the lower edge of the rear wall 44C, and the vehicle body vertical direction outer end of the top plate portion 44A and the front and rear flanges 44D, 44E are erected upward in the vehicle vertical direction. The outer wall 44F, the front and rear flanges 44D, the inner wall 44G erected from the inner end in the vehicle width direction of 44E, and the outer wall 44F extending incline corresponding to the outer flange 42D from the upper end of the outer wall 44F. Flange 44H and top plate And a flange 44I among which extends (substantially flush) in the vehicle width direction inward in response to the inner flange 42E from the vehicle body vertical direction upper end in the vehicle width direction inner end and an inner wall 44G of 44A.

  Supplementing the sandwich upper panel 44 of the floor cloth 28Lh, the bulging portion 44J superimposed on the bulging portion 42F is bulged from the front and rear flanges 44D and 44E, respectively, and is continuous with the front wall 44B and the rear wall 44C. In the front wall 44B and the rear wall 44C, the lower part of the vehicle body in the vertical direction is cut away from the bulging portion 44J to prevent the bulging portion 42F from interfering.

  In the sandwich upper panel 44, the front flange 44D has a front flange 42G, the rear flange 44E has a rear flange 42H, the outer wall 44F has an outer wall 42B (a part thereof), the inner wall 44G has an inner wall 42C, and an outer flange. 44H is joined to the outer flange 42D and the inner flange 44I is joined to the inner flange 42E, so that the sandwich panel 40 sandwiching the vertical member 34Lh, each EA cross 36, and each lateral cross 38 with the sandwich lower panel 42 is formed. Yes. In this state, the front wall 44B of the sandwich upper panel 44 abuts the front end 34B of the vertical member 34Lh, the front wall 36C, 38C of the EA cloth 36 and the lateral cross 38 disposed at the front, and the sandwich upper panel 44 The rear wall 44C is in contact with the rear end 34C of the vertical member 34Lh, the rearmost EA cross 36, and the rear walls 36D and 38D of the horizontal cross 38 (for the EA cross 36 and the horizontal cross 38, FIG. (See FIG. 8).

  Further, as shown in FIGS. 1, 2 and 8, the sandwich upper panel 44 is provided with a recess 46 which enters between the horizontal cloths 38 spaced apart in the longitudinal direction of the vehicle body. The recess 46 is provided with a pair of front and rear corresponding to the three horizontal crosses 38 provided. Each concave portion 46 includes a concave bottom wall 46A that is superimposed on the bottom plate portion 42A of the sandwich lower panel 42, a front wall 46B that abuts a rear wall 38D of the lateral cross 38 that is positioned on the front side in the vehicle longitudinal direction, and a vehicle body longitudinal direction. A rear wall 46C that contacts the front wall 38C of the lateral cross 38 positioned on the rear side, an outer wall 46D that contacts the inner side surface 34D in the vehicle width direction of the vertical member 34Lh, and an inner wall 42C of the sandwich lower panel 42 that contacts the right side. It is configured to be surrounded by the inner wall 46E.

  Thus, the vertical member 34Lh, each EA cross 36, and each horizontal cross 38 sandwiched from above and below by the sandwich panel 40 are in the vehicle longitudinal direction, the vehicle width direction, and the vehicle vertical direction with respect to the sandwich panel 40. As shown in FIG. 2, the floor cloth 28 is constrained.

  A portion of the floor cloth 28Rh that is different from the floor cloth 28Lh (not symmetric) will be described. As shown in FIGS. 6, 11, and 12, on the right side of the vehicle body B with respect to the floor tunnel 16, the cylinder portion 56 is not provided on the floor panel 14 for laying the fuel pipe 54. 3 and FIG. 4, instead of the vertical member 34Lh having the recess 35, a vertical urethane foam U is filled in the outer shell H in the same manner as the EA cross 36 and the horizontal cross 38. A member 34Rh is provided. Therefore, in the floor cloth 28Rh, the bulging portion 42F is not formed in the bottom plate portion 42A of the sandwich lower panel 42, and the bulging portion 44J (notches in the front wall 44B and the rear wall 44C) is formed in the sandwich upper panel 44. Absent.

  The other structure of the floor cloth 28Rh is the same as the corresponding structure of the floor cloth 28Lh. Therefore, the vertical member 34Rh is different from the vertical member 34Lh in its structure as a single unit, but the relationship between the EA cross 36, the horizontal cross 38, and the sandwich panel 40 is exactly the same except for the portions related to the recesses 35, 42F, and 44J ( Symmetric). Hereinafter, when it is not necessary to distinguish the vertical member 34Lh and the vertical member 34Rh, they may be simply referred to as the vertical member 34.

  As shown in FIGS. 5 and 6, the floor cloth 28 described above is joined onto the floor panel 14 to connect the rocker 12 and the floor tunnel 16. Before explaining the mounting structure of the floor cross 28 to the vehicle body floor F (automobile body B), the structure around the vehicle body floor F will be supplemented.

  As shown in FIGS. 5 and 6, the floor panel 14 has an outer flange 14 </ b> A extending upward from the vehicle width direction outer end in the vehicle body vertical direction and joined to the outer surface 12 </ b> C of the rocker 12 by, for example, adhesion or rivet. In addition, the vicinity of the outer flange 14 </ b> A is joined to the lower surface 12 </ b> D of the rocker 12 by, for example, adhesion or rivet, and the inner end in the vehicle width direction is joined to the floor tunnel 16. As shown in FIG. 9, the floor tunnel 16 is a tunnel side skeleton portion 48 having a closed cross-sectional structure formed over substantially the entire length in the vehicle longitudinal direction on both sides in the vehicle width direction of the opening end 16 </ b> A that opens downward in the vehicle vertical direction. The inner end of the floor panel 14 in the vehicle width direction is joined to the lower surface 48A of the tunnel side skeleton 48 by, for example, adhesion or rivet.

  Further, as shown in FIG. 5, the lower portion of the rocker 12 is inclined to the upper side of the inner wall 50 extending in the vehicle body vertical direction so as to face both the vehicle body vertical direction upper side and the vehicle width direction inner side. An inclined wall 52 constituting the surface is provided. The height of the inner wall 50 in the vertical direction of the vehicle body is substantially equal to the height of the outer wall 42B of the sandwich lower panel 42 in the vertical direction of the vehicle body. In addition, the inclination angle of the inclined wall 52 with respect to the horizontal plane substantially matches the inclination angle of the outer flange 42D and the outer flange 44H of the sandwich panel 40 with respect to the horizontal plane.

  In the vehicle body floor structure 10, the floor cross 28 is fixed to the floor panel 14 by bonding (and rivets) over the entire surface of the bottom plate portion 42 </ b> A of the sandwich lower panel 42 on the outer end side in the vehicle width direction. The outer wall 42B and the outer flange 42D (the outer wall 44F and the outer flange 44H) are fixed to the inner wall 50 and the inclined wall 52 of the rocker 12 by bonding (and rivets). Therefore, in this embodiment, the floor panel 14 corresponds to the cover panel in the present invention.

  In the floor cloth 28, the inner flange 42E (inner flange 44I) of the sandwich lower panel 42 is fixed to the upper surface 48B of the tunnel side frame 48 by bonding (and rivets) on the inner end side in the vehicle width direction. In this state, the inner side wall 42C of the floor cloth 28 (the inner end 38B in the vehicle width direction of each lateral cross 38) is in contact with or very close to the outer wall 48C forming the inner end in the vehicle width direction of the tunnel side skeleton 48. positioned.

  Further, to supplement the structure on the left side with respect to the floor tunnel 16, as shown in FIG. 12, the fuel pipe 54 extending from the front space Rf of the dash panel 20 to the rear space Rr of the room partition panel 24 is inserted into the floor panel 14. A cylindrical portion 56 surrounding the hollow portion 56A is provided over the entire length in the longitudinal direction of the vehicle body. As shown in FIG. 10, the upper half 56B in the vertical direction of the vehicle body in the cylindrical portion 56 is a recess 45 of the sandwich lower panel 42. (Recess 35 of vertical member 34Lh) is inserted. The upper portion 56B of the cylindrical portion 56 is fixed by adhesion or the like on the inner surface (lower surface) of the bulging portion 42F.

  Further, in the vehicle body floor structure 10, seat rail fixing portions 58 and 60 as outer attachment portions for attaching the seat rail 30 that supports the vehicle seat S are provided on the floor cloth 28 described above. As shown in FIGS. 1 to 4, the seat rail fixing portion 58 is disposed in the vicinity of the inner end 36 </ b> A in the vehicle width direction of the EA cross 36 disposed at the forefront. The EA cross 36 is disposed in the vicinity of the inner end 36A in the vehicle width direction.

  Specifically, as shown in FIG. 7, the seat rail fixing portion 58 includes a fastening collar 62 that penetrates the vicinity of the inner end 36 </ b> A in the vehicle width direction of the EA cross 36 that is disposed in the forefront of the floor cross 28. It is configured by being held by an insert material 64 embedded in the EA cloth 36. The fastening collar 62 has a screw hole 62A that opens upward in the vehicle body vertical direction. As shown in FIG. 5, the front end of the seat rail 30 is floor crossed by a seat anchor bolt 66 that is screwed into the screw hole 62A. 28 is fastened and fixed.

  As shown in FIGS. 1 to 4, the seat rail fixing portion 60 includes a fastening collar 62 that passes through a portion in the vicinity of the inner end 36 </ b> A in the vehicle width direction of the EA cross 36 disposed at the end of the floor cross 28. It is comprised by hold | maintaining with the insert material 64 embed | buried in 36. FIG. The fastening collar 62 is configured to fasten and fix the rear end of the seat rail 30 to the floor cloth 28 by a seat anchor bolt 66 screwed into the screw hole 62A.

  The seat rail fixing portions 58 and 60 form a through hole penetrating the insert material 64, the floor cloth 28, and the floor panel 14 in a state where the floor cloth 28 is fixed on the floor panel 14, and the through holes are formed in the through holes. The fastening collar 62 is configured to be press-fitted (fitted), and the fastening collar 62 supports the fastening load by engaging the flange 62B with the lower surface of the floor panel 14. The insert member 64 constituting the seat rail fixing portion 60 is formed with a positioning hole 68 that opens on the front side in the vehicle longitudinal direction with respect to the fastening collar 62 and into which the positioning portion of the seat rail 30 is inserted.

  On the other hand, the seat rail 32 located on the inner side in the vehicle width direction with respect to the seat rail 30 is fixed by seat rail fixing portions 70 and 72 as inner mounting portions disposed in the tunnel side skeleton portion 48. Yes. As shown in FIG. 9, the seat rail fixing portion 70 includes inner flanges 42 </ b> E and 44 </ b> I of the floor cloth 28, a tunnel side skeleton portion 48, and a fastening collar 74 as a fixing member penetrating the floor panel 14. It is configured by being held by the insert material 64 embedded in the portion 48. The fastening collar 74 has screw holes 74A and 74B that open on both sides in the vertical direction of the vehicle body, and the front end of the seat rail 32 is connected to the tunnel side frame portion 48 by a seat anchor bolt 66 that is screwed into the upper screw hole 74A. It is designed to be fastened and fixed.

  The seat rail fixing portion 72 holds the fastening collar 74 penetrating the inner flanges 42E and 44I, the tunnel side frame portion 48, and the floor panel 14 of the floor cloth 28 with an insert material 64 embedded in the tunnel side frame portion 48. Is made up of. The fastening collar 74 is configured to fasten and fix the rear end of the seat rail 32 to the tunnel side skeleton 48 by a seat anchor bolt 66 that is screwed into the upper screw hole 74A. The fastening collar 74 supports the fastening load of the seat anchor bolt 66 by the flange 74 </ b> C engaging with the lower surface of the floor panel 14.

  12, the vehicle body floor structure 10 includes a pair of front and rear tunnel underbraces 76 for connecting the left and right tunnel side skeleton portions 48 (floor crosses 28Lh, 28Rh) sandwiching the floor tunnel 16 therebetween. It has. As shown in FIG. 9, each tunnel underbrace 76 corresponds to a connecting member in the present invention, and is formed with a metal material such as an aluminum alloy in the longitudinal direction in the vehicle width direction, and the fastening in which the both ends in the vehicle width direction are different on the left and right sides. It is fixed to the fastening collar 74 by fastening bolts 78 screwed into the lower screw holes 74B of the use collar 74, and bridges the left and right tunnel side skeleton portions 48 in parallel in all directions of the vehicle body. Therefore, in the vehicle body floor structure 10, it can be understood that the seat rail 32 and the tunnel underbrace 76 are fastened together by the common fastening collar 74. In addition, the tunnel under brace 76 is not restricted to a metal material, For example, you may comprise with fiber reinforced plastics, such as CFRP.

  Further, in the vehicle body floor structure 10, as shown in FIG. 13, the seat frame 80 that is disposed on the floor cloth 28 and that constitutes the vehicle seat S has a predetermined range in the vehicle longitudinal direction by the left and right seat rails 30 and 32. Only slides are supported so that they can be held at any slide position. The seat frame 80 has a substantially rectangular frame shape in plan view, and spans between the left and right seat rails 30 and 32. The seat frame 80 and the seat rails 30 and 32 are each made of a metal material such as steel.

  In 10 described above, for example, a load input inward in the vehicle width direction to the rocker 12 is transmitted from the rocker 12 to the EA cloth 36 of the floor cloth 28 as schematically shown in FIG. Is transmitted to the vertical members 34 along the vehicle width direction, transmitted to the respective horizontal crosses 38 while being distributed in the longitudinal direction of the vehicle body by the vertical members 34, transmitted from the horizontal crosses 38 to the floor tunnel 16, and further tunnel underbraces. It is transmitted to the floor cloth 28 and the rocker 12 on the opposite side of the floor tunnel 16 via 76.

  FIG. 15 shows a model of the structure and load transmission path of the vehicle body floor structure 10. In this figure, a member located at the outer end in the vehicle width direction is a door 82 for opening and closing a vehicle body opening for passenger getting on and off. As shown in this figure, in the vehicle body B to which the vehicle body floor structure 10 is applied, the portion from the door 82 to the EA cross 36 is mainly formed with the vehicle width direction outer side surface 34A of the vertical member 34 of the floor cross 28 as a boundary. The shock absorption (crushable) area that absorbs shock by deformation (crushing) at the time of a side collision, mainly deformation from the vertical member 34 to the floor tunnel 16 (tunnel side skeleton 48, tunnel underbrace 76) is suppressed. It is an occupant protection area for securing an indoor space for the occupant.

  Further, in the vehicle body floor structure 10 (floor cloth 28), the EA cloth 36 and the lateral cloth 38, which are members mainly transmitting the load in the vehicle width direction, have respective outer shells H as schematically shown in FIG. The CFRP fiber to be configured has an orientation layer oriented along the vehicle width direction. In this embodiment, in the outline H of the EA cloth 36 and the lateral cloth 38, the orientation direction of almost all fibers is substantially aligned with the vehicle width direction. In addition, there is no restriction | limiting in particular in the orientation of the carbon fiber of the vertical member 34, the sandwich lower panel 42, and the sandwich upper panel 44. In this embodiment, carbon fiber is orientated so that the physical property of each member may exhibit pseudo-isotropic property. Yes.

  Further, in the automobile body B to which the vehicle body floor structure 10 is applied, an energy absorbing member 84 is disposed in the rocker 12. As shown in FIGS. 5 and 6, the energy absorbing member 84 includes an energy absorbing portion 86 formed in a substantially rectangular shape that is long in the vehicle width direction when viewed from the front. As shown in FIGS. 17 (A) and 17 (B), the energy absorbing portion 86 is continuously waved in a longitudinal direction in which the ridge portions 86A and the valley portions 86B coincide with the longitudinal direction of the vehicle body in a side view. It is formed in a plate shape and has a substantially uniform width over its entire length. The peak portions 86A and 46B of the energy absorbing portion 86 are each formed in a substantially semicircular arc shape when viewed from the side. In this embodiment, the energy absorbing portion 86 is arranged so as to form a semicircular arc shape in which the peak portion 86A opens downward and in a semicircular arc shape in which the valley portion 86B opens upward.

  As shown in FIG. 17A, the energy absorbing member 84 has support plate portions 88 provided at both ends in the width direction that coincide with the vehicle width direction of the energy absorbing portion 86 (in FIG. 88 has been removed). The height of the support plate portion 88 in the vertical direction of the vehicle body is higher than the height in the vertical direction of the vehicle body from the upper end (top portion of the mountain portion 86A) to the lower end (top portion of the valley portion 86B) of the energy absorbing portion 86. The entire width direction both end faces (corrugated end faces) of the energy absorbing portion 86 are fixed.

  And as FIG. 5 shows, the energy absorption member 84 is arrange | positioned in the lowest part in the rocker 12 so that the width direction may correspond with a vehicle width direction. The energy absorbing member 84 is held at a predetermined position and posture with respect to the rocker 12 by, for example, a foamed urethane foam U filled in the rocker 12 (partitioned space).

  In this state, the energy absorbing member 84 has the front and rear end positions of the vehicle body longitudinal direction substantially coincided with the front and rear end positions of the floor cross 28 in the vehicle longitudinal direction, and the upper and lower end positions of the floor cross 28 in the vehicle body vertical direction. It is substantially coincident with the positions of the upper and lower ends in the vertical direction of the vehicle body. Therefore, in the vehicle body floor structure 10, a load that is buffered while the energy absorbing member 84 is deformed inside is input from the rocker 12 to the EA cloth 36. Since the energy absorbing member 84 has the corrugated plate-shaped energy absorbing portion 86, any load such as a load that is locally input in a part in the vehicle longitudinal direction or a load that is input in a direction inclined with respect to the vehicle width direction can be used. It is configured to be able to obtain a shock absorbing effect by being stably deformed with respect to a load from the direction.

  Next, the operation of the first embodiment will be described.

  In the vehicle body B to which the vehicle body floor structure 10 having the above configuration is applied, for example, as shown in FIG. 14, a pole P that is a columnar member extending in the vehicle body vertical direction collides from the side of the seating area of the occupant. (When a so-called pole side collision occurs), the door 82 and the rocker 12 are deformed (destroyed) in the vicinity of the collision part of the pole P together with the energy absorbing member 84 to absorb the impact energy, and the load accompanying this pole collision is absorbed. It is transmitted to the floor cloth 28.

  This load is transmitted to the EA cloth 36 in the vicinity of the collision part of the pole P as a load F1 acting locally on a part of the floor cloth 28 in the longitudinal direction of the vehicle body. The EA cloth 36 is mainly compressed and deformed in the longitudinal direction. The impact load is transmitted to the vertical member 34 while being (crushed). Due to the compression deformation of the EA cloth 36, the impact load of the pole side collision is further absorbed.

  On the other hand, the load transmitted to the vertical member 34 is distributed in the longitudinal direction of the vehicle body substantially coincident with the longitudinal direction of the vertical member 34 (see load F2 in FIG. 14) and distributed to the three horizontal crosses 38 (FIG. 14). Load F3). A part of the load distributed in the longitudinal direction of the vertical member 34 is also distributed to the floor panel 14 as an oblique load toward the floor tunnel 16 via the sandwich panel 40 (see load F4 in FIG. 14). . Further, a part of the load F3 distributed to each lateral cross 38 is supported by the floor tunnel 16 (tunnel side skeleton 48) forming the skeleton (high rigidity) of the automobile body B, and is also provided in the vehicle longitudinal direction. In addition, the other part of the load F3 is transmitted to the floor cross 28 and the rocker 12 on the opposite side of the floor tunnel 16 via the tunnel underburse 76 (the arrow A route in FIG. 15).

  Further, the load accompanying the compression of the EA cloth 36 is also transmitted to the seat rail 30 via the sandwich panel 40, the insert material 64, the fastening collar 62, and the seat anchor bolt 66. A part of this load is distributed in the longitudinal direction of the vehicle body substantially coincident with the longitudinal direction of the seat rail 30, and is transmitted as an inward load in the vehicle width direction to the lateral cross 38 that is separated from the pole side projecting portion in the longitudinal direction of the vehicle body. The This load is transmitted to the floor tunnel 16, the anti-collision side floor cross 28, and the rocker 12 by the above-described arrow A route. Further, the other part of the load transmitted to the seat rail 30 is transmitted from the seat rail 30 to the floor tunnel 16 (tunnel side frame portion 48) and the tunnel underbrace 76 via the seat frame 80 and the seat rail 32. (See the arrow B route in FIG. 15).

  Furthermore, when the energy of the pole side collision is large and the deformation of the EA cross 36 reaches the installation area of the seat rail 30, an inward load in the vehicle width direction acts directly on the seat rail 30 from the pole P. Are transmitted to the floor tunnel 16 (tunnel side skeleton 48) and the tunnel underbrace 76 by the arrow A route via the horizontal cross 38 and the arrow B route via the seat frame 80 as described above.

  As described above, in the vehicle body B to which the vehicle body floor structure 10 is applied, the vehicle width is mainly larger than the vehicle width direction outer side surface 34A of the vertical member 34 when a large load is locally input like a pole side collision. The outer portion in the direction (mainly the shock absorbing area mainly composed of the EA cross 36, the rocker 12, and the door 82) is deformed and absorbs the impact energy, and is further in the vehicle width direction than the vehicle width direction outer side surface 34A of the vertical member 34. In the inner part, the vertical member 34 disperses the load, so that local stress concentration is relaxed, local deformation and destruction are prevented, and an interior space for the occupant seated on the vehicle seat S is secured. The

  The floor cloth 28 is provided in an area in the longitudinal direction of the vehicle body including an extension area of the seat rails 30 and 32 (an area between the seat rail fixing portions 58 and 60) that supports the vehicle seat S so as to be slidable in the longitudinal direction of the vehicle body. In other words, since the EA cross 36 is disposed without gaps in the longitudinal direction of the vehicle body in this region, any slide position of the vehicle seat S that can be adjusted, that is, the seating position of the occupant in the longitudinal direction of the vehicle body. The occupant can be protected by exhibiting a shock absorbing effect stably.

  Supplementally, CFRP is a brittle material. If a cross member is simply provided in parallel in the longitudinal direction of the vehicle body like a metal body, deformation of the vehicle body may occur when the pole P collides between the cross members. Although it tends to be large, by effectively arranging the EA cross 36 over the seating area of the occupant, effective energy absorption is achieved against the collision of the pole P to the side of the occupant seating area. In addition, since the vertical member 34 is dispersed in the longitudinal direction of the vehicle body, the load from the EA cross 36 with which the pole P has collided eliminates the need for densely arranging the lateral crosses 38 in the longitudinal direction of the vehicle body. Contribute.

  In particular, in the vehicle body floor structure 10, the orientation direction of the carbon fibers of the outer shell H constituting the EA cross 36 and the lateral cross 38 coincides with the load transmission direction (vehicle width direction). Compared to the configuration employed, the weight can be reduced while ensuring the equivalent strength in the compression direction.

  In the vehicle body floor structure 10, since the sandwich panel 40 sandwiches the vertical member 34, the EA cross 36, and the horizontal cross 38 from above and below and holds (restrains) them in a predetermined posture, the vertical member 34, the EA cross 36, and the horizontal cross 38. Therefore, the EA cloth 36 is reliably deformed (impact absorption), and the load transmission from the EA cloth 36 to the vertical member 34 and the horizontal cross 38 is achieved.

  Further, in the vehicle body floor structure 10, the seat rail 30 is fixed to the floor cloth 28, and more specifically, the seat rail fixing portion 58 provided in the vicinity of the inner end 36 </ b> A in the vehicle width direction of the foremost and last EA cloth 36. , 60, the side rail load can be distributed in the vehicle longitudinal direction also by the seat rail 30. That is, it is possible to reduce the load shared by the vertical member 34, which contributes to weight reduction.

  Furthermore, in the vehicle body floor structure 10, the seat rail 32 is fixed to the inner ends of the tunnel side frame 48 and the floor cross 28 in the vehicle width direction, and the seat rail 30 and the seat rail 32 are connected by the seat frame 80. Therefore, the load input to the seat rail 30 is transmitted to the tunnel side skeleton 48, the anti-collision side floor cross 28, and the rocker 12 by a route (arrow B route) different from the floor cross 28 (arrow A route). can do. In addition, since the front and rear ends of the seat rails 30 and 32 fixed to the floor cross 28 and the tunnel side frame 48 are connected by a frame-like seat frame 80, in other words, the left and right seat rails 30 and 32 Since the box frame is formed with the seat frame 80, the rigidity against bending and twisting of the floor cloth 28 is enhanced. For this reason, bending mode deformation in the vehicle body vertical direction of the floor cloth 28 with respect to the vehicle width direction inward load (compression direction load) to the vehicle width direction outer end is suppressed, and more reliable deformation (impact absorption) of the EA cloth 36 is achieved. A more reliable load transmission from the EA cross 36 to the vertical member 34 and the horizontal cross 38 is achieved.

  Here, in the vehicle body floor structure 10, an inclined wall 52 is provided on the upper side of the inner wall 50 in the rocker 12, and outer flanges 42 </ b> D and 44 </ b> H of the floor cloth 28 are joined to the inclined wall 52 from the upper side in the vehicle vertical direction. For example, even when the inner wall 50 and the outer wall 42B are disconnected, the outer flanges 42D and 44H are caught by the inclined wall 52 and the floor cloth 28 is dropped with respect to the rocker 12. Thus, proper load transmission from the rocker 12 to the floor cloth 28 (EA cloth 36) is achieved. In particular, since the common floor panel 14 is joined to the lower surface 12D of the rocker 12 and the bottom plate portion 42A of the sandwich lower panel 42, the rocker 12 may be displaced downward in the vehicle body vertical direction with respect to the floor cloth 28. Even if the inner wall 50 and the outer wall 42B are disconnected as described above, proper load transmission from the rocker 12 to the floor cloth 28 (EA cloth 36) is reliably achieved.

  Further, in the vehicle body floor structure 10, the seat rail 32 and the tunnel underbrace 76 are fastened together by a common fastening collar 74, and therefore, via the seat rail 30, the seat frame 80, and the seat rail 32 (arrow B route). ) Can be transmitted directly to the tunnel under brace 76 and efficiently transmitted to the anti-collision side. Further, the fastening collar 74 penetrating the tunnel side skeleton portion 48 is positioned so as to overlap the horizontal cross 38 in the vertical direction of the vehicle body and in the longitudinal direction of the vehicle, so that the load from the horizontal cross 38 is effectively supported. Further, it can be transmitted to the anti-collision side via the tunnel underburse 76. Further, by using the fastening collar 74 in common, the number of parts (metal parts) can be reduced, which contributes to further weight reduction.

  Furthermore, in the vehicle body B to which the vehicle body floor structure 10 is applied, the fuel pipe 54 is disposed in the vehicle width direction inner side than the vehicle width direction outer side surface 34A of the vertical member 34Lh, that is, below the passenger protection area. The fuel pipe 54 is prevented from being damaged due to the side collision. In particular, since the cylindrical portion 56 of the floor panel 14 is inserted into the recess 35 provided in the vertical member 34Lh configured as an FRP block, and the cylindrical portion 56 is reinforced by the vertical member 34Lh, the fuel pipe 54 further increases. Effectively protected.

(Second Embodiment)
Next, a floor cloth 92 constituting a vehicle body floor structure 90 according to a second embodiment of the present invention will be described with reference to FIG. Note that parts and portions that are basically the same as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof is omitted, and illustration may be omitted.

  As shown in FIG. 18, the floor cloth 92 includes a vertical member 34 (34Lh), an EA cloth 36, a horizontal cloth 38, and a sandwich panel 40 including a sandwich lower panel 42 and a sandwich upper panel 44. Among these, the orientation of the carbon fibers in the EA cloth 36, the transverse cloth 38, the sandwich lower panel 42, and the sandwich upper panel 44 is different from the orientation in the first embodiment.

  Specifically, at least the surface layer (sandwich lower panel 42, sandwich upper panel 44, layer in contact with the adjacent EA cloth 36) of the outer shell H constituting each EA cloth 36 has a carbon fiber orientation in the load transmission direction (vehicle width). The cross-alignment layer is inclined so as to cross the direction. In this embodiment, the carbon fibers in the surface layer of the outer shell H are oriented with an inclination of 45 ° and −45 ° (hereinafter referred to as ± 45 °) with respect to the vehicle width direction, thereby forming a cross-oriented layer. ing.

  Similarly, at least the surface layer (sandwich lower panel 42, sandwich upper panel 44, layer in contact with the adjacent horizontal cloth 38) of the outer shell H constituting each horizontal cloth 38 has a carbon fiber orientation in the load transmission direction (vehicle width direction). The cross-orientation layer is inclined so as to intersect with each other. In this embodiment, the carbon fibers in the surface layer of the outer shell H are aligned with an inclination of ± 45 ° with respect to the vehicle width direction to form a cross alignment layer (one form of the inclined alignment layer).

  In the sandwich lower panel 42, at least the upper surface of the bottom plate portion 42 </ b> A, that is, the surface on the contact side with the EA cross 36 and the horizontal cross 38 is oriented in the vehicle width direction (the main load transmission direction in the EA cross 36 and the horizontal cross 38). The cross-orientation layer is inclined so as to cross. In this embodiment, the carbon fibers on the upper surface of the bottom plate portion 42A of the sandwich lower panel 42 are aligned with an inclination of ± 45 ° with respect to the vehicle width direction, thereby forming a cross alignment layer.

  Similarly, in the sandwich upper panel 44, at least the lower surface of the top plate portion 44A, that is, the surface on the contact side with the EA cross 36 and the horizontal cross 38, the orientation of the carbon fibers is the vehicle width direction (the main in the EA cross 36 and the horizontal cross 38). The cross-orientation layer is inclined so as to intersect the load transmission direction. In this embodiment, the carbon fibers on the lower surface of the top plate portion 44A of the sandwich upper panel 44 are aligned with an inclination of ± 45 ° with respect to the vehicle width direction, thereby forming a cross alignment layer. In this embodiment, the lower surface of the concave bottom wall 46A in the sandwich upper panel 44, that is, the surface on the contact side with the bottom plate portion 42A is also a cross-oriented layer.

  In FIG. 18, only the left floor cloth 92 is shown, but the right floor cloth 92 (the floor cloth 92 having the vertical members 34Rh) also includes the EA cloth 36, the lateral cloth 38, the sandwich lower panel 42, and the sandwich upper cloth. The surface layer of the panel 44 is a cross-oriented layer similar to the left floor cloth 92.

  Other configurations of the vehicle body floor structure 90 are configured in the same manner as the vehicle body floor structure 10 according to the first embodiment, including portions not shown.

  Therefore, the vehicle body floor structure 90 according to the second embodiment also has the same effect as that of the first embodiment except for the function and effect of the fiber orientation of the EA cross 36 and the lateral cross 38 being oriented along the vehicle width direction. The same effect can be obtained by the same operation as that of the vehicle body floor structure 10. In the vehicle body floor structure 90, at least the surface layers of the EA cloth 36, the horizontal cloth 38, the sandwich lower panel 42, and the sandwich upper panel 44 constituting the floor cloth 92 are configured by orienting carbon fibers at ± 45 °. A load (side impact load) input inward in the vehicle width direction can be transmitted in the vehicle width direction while being distributed in the vehicle longitudinal direction.

  More specifically, for example, in the EA cloth 36 and the horizontal cloth 38 (components), as shown by the arrows in FIG. 19, the vehicle width while the load is distributed in the longitudinal direction of the vehicle body along the orientation direction of the carbon fibers. As shown schematically in FIG. 20, the entire floor cloth 92 can disperse the load in a wider range in the longitudinal direction of the vehicle body than the vehicle body floor structure 10. In particular, since the surface layers of the EA cloth 36, the horizontal cloth 38, the sandwich lower panel 42, and the sandwich upper panel 44 that are in contact with each other are cross-orientation layers having the same orientation, it is possible to transmit loads efficiently between adjacent members. , Load dispersibility is further improved. Thereby, for example, in the EA cross 36 on the load input side, load transmission (dispersion) is also performed between the adjacent EA crosses 36 that are shifted in the longitudinal direction of the vehicle body from the collision portion with the pole P (arrow F5 in FIG. 20). In the horizontal cross 38, the load can be effectively distributed to the floor panel 14 via the sandwich panel 40 (see arrows F6 and F7 in FIG. 20).

  In each of the above-described embodiments, the carbon fiber orientation of the EA cloth 36, the transverse cloth 38, etc. is shown as an example in which the carbon fiber orientation is oriented in the vehicle width direction. For example, a part or all of the EA cross 36 and the lateral cross 38 may be quasi-isotropic, or may be inclined in a certain direction with respect to the vehicle width direction. The orientation direction with respect to the transmission direction may be set to a direction other than 45 °.

  In each of the above-described embodiments, the example in which the vehicle width direction inner end 36A of the EA cross 36 and the vehicle width direction outer end 38A of the horizontal cross 38 are directly abutted against the vertical member 34 has been described. For example, the load can be transmitted between the vertical member 34 and the inner end 36A of the EA cross 36 in the vehicle width direction, and between the vertical member 34 and the outer end 38A of the horizontal cross 38 in the vehicle width direction. A member may be interposed.

It is a disassembled perspective view of the left-side floor cloth which comprises the principal part of the vehicle body floor structure which concerns on the 1st Embodiment of this invention. It is a perspective view of the left floor cross which comprises the principal part of the vehicle body floor structure which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view of the right-side floor cloth which comprises the principal part of the vehicle body floor structure which concerns on the 1st Embodiment of this invention. It is a perspective view of the right-side floor cross which comprises the principal part of the vehicle body floor structure which concerns on the 1st Embodiment of this invention. It is front sectional drawing which shows the left side of the vehicle body floor structure which concerns on the 1st Embodiment of this invention. It is front sectional drawing which shows the right side of the vehicle body floor structure which concerns on the 1st Embodiment of this invention. FIG. 12 is a cross-sectional view taken along line 7-7 in FIG. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. It is front sectional drawing which expands and shows the joint fastening part of the seat rail and tunnel under bracket which comprise the vehicle body floor structure which concerns on the 1st Embodiment of this invention. It is front sectional drawing which expands and shows the fuel piping installation site | part and the connection site | part with a rocker in the vehicle body floor structure which concern on the 1st Embodiment of this invention. It is the perspective view which looked at the automobile body to which the body floor structure concerning the 1st embodiment of the present invention was applied from the upper part. It is the perspective view which looked at the automobile body to which the vehicle body floor structure concerning a 1st embodiment of the present invention was applied from the lower part. It is a perspective view which shows the attachment state of the seat frame to the motor vehicle body to which the vehicle body floor structure which concerns on the 1st Embodiment of this invention was applied. It is a perspective view which shows the transmission path | route of the pole side impact load of the motor vehicle body to which the vehicle body floor structure concerning the 1st Embodiment of this invention was applied. 1 is a front view schematically showing a transmission path of a pole-side collision load of an automobile body to which a vehicle body floor structure according to a first embodiment of the present invention is applied. It is a perspective view which shows typically the orientation of the carbon fiber of the EA cloth which comprises the vehicle body floor structure which concerns on the 1st Embodiment of this invention, and a horizontal cloth. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the energy absorption member arrange | positioned at the rocker of the motor vehicle body to which the vehicle body floor structure concerning the 1st Embodiment of this invention was applied, Comprising: (A) is the perspective view seen from the vehicle width direction inside, (B) is the perspective view seen from the vehicle width direction outer side. It is a perspective view which shows typically the carbon fiber orientation direction of EA cloth and horizontal cloth which comprise. It is a disassembled perspective view of the left-side floor cloth which comprises the principal part of the vehicle body floor structure which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows typically the orientation and load transmission direction of the carbon fiber of the EA cloth which comprises the vehicle body floor structure which concerns on the 2nd Embodiment of this invention, and a horizontal cloth. It is a perspective view which shows the transmission path | route of the pole side impact load of the motor vehicle body to which the vehicle body floor structure concerning the 2nd Embodiment of this invention was applied.

Explanation of symbols

10 Body floor structure (body panel structure)
12 Rocker 14 Floor panel (cover panel)
16 Floor tunnel (tunnel part)
28 Floor cross (body panel structure)
30 Seat rail (Seat frame member)
34 Longitudinal member (first frame member)
35 Concave portion 36 EA cross (second skeleton member)
38 Horizontal cross (third frame member)
40 Sandwich panel (a pair of panel members)
42 Sandwich lower panel (one of a pair of panel members)
44 Sandwich upper panel (the other of a pair of panel members)
54 Fuel piping (piping)
58/60 Seat rail fixing part (outer mounting part)
70/72 Seat rail fixing part (inner mounting part)
74 Fastening collar (fixing member)
90 Body floor structure (body panel structure)
92 Floor cross (body panel structure)

Claims (13)

A first skeleton member made of a material containing fiber reinforced plastic and extending in the longitudinal direction of the vehicle body ;
A plurality of second skeleton members each made of a material containing fiber reinforced plastic, each extending in the vehicle width direction and having an inner end in the vehicle width direction abutted against the first skeleton member;
A plurality of third skeleton members each made of a material containing fiber reinforced plastic, each extending in the vehicle width direction and having an outer end in the vehicle width direction abutted against the first skeleton member ;
A pair of panel members that sandwich and hold the first skeleton member, the second skeleton member, and the third skeleton member from both sides in the vertical direction of the vehicle body ;
The vehicle width direction outer ends of the plurality of second skeleton members are arranged to transmit a load in the vehicle width direction from a rocker extending in the vehicle body front-rear direction at the vehicle width direction outer ends of the vehicle floor portions, respectively. And
The vehicle width direction inner ends of the plurality of third skeleton members are arranged so as to be able to transmit a load in the vehicle width direction to tunnel portions extending in the vehicle longitudinal direction at the vehicle width direction inner ends of the vehicle floor portions, respectively. Body panel structure. 2. The vehicle body panel structure according to claim 1, wherein the plurality of second skeleton members are arranged more densely in the vehicle longitudinal direction than the plurality of third skeleton members . The vehicle body panel structure according to claim 1 or 2, wherein each of the pair of panel members is made of a material containing fiber reinforced plastic . Wherein one or both of the second frame member and the third frame member is one of claims 1 to 3 having a vehicle width alignment layer fibers constituting the fiber-reinforced plastic are oriented along the vehicle width direction The vehicle body panel structure according to item 1 . Wherein one or both of the second frame member and the third frame member is claims 1 having an inclined orientation layer fibers constituting the fiber-reinforced plastic are oriented to be inclined by a predetermined angle with respect to the vehicle width direction The vehicle body panel structure according to any one of 4. One or both of the second skeleton member and the third skeleton member have a cross-alignment layer in which fibers constituting the fiber reinforced plastic are aligned so as to cross while being inclined at a predetermined angle with respect to the vehicle width direction. body panel structure according to any one of claim 1 to claim 5. One or both of the second skeleton member and the third skeleton member has at least a surface layer facing the vehicle body vertical direction as the inclined alignment layer or the cross alignment layer,
The pair of panel members are made of a fiber reinforced plastic in which at least the surfaces of the second skeleton member and the third skeleton member are oriented in the same direction as the inclined alignment layer or the cross alignment layer. and it has claim 5 or claim 6 vehicle body panel structure according. An outer mounting portion in the vehicle width direction of the vehicle seat is provided on at least two of the plurality of second skeleton members, respectively,
Body panel structure according to any one of claims 1 to 7 in which said at least two outer attachment portion connected with the seat frame member. The first skeleton member, the second skeleton member, the third skeleton member, and the pair of panel members are respectively provided on both sides of the vehicle width direction center portion of the vehicle body,
The vehicle body panel structure according to claim 8 , further comprising a connecting member that connects between the inner mounting portions in the vehicle width direction of the vehicle seat respectively positioned on both sides of the vehicle width direction center portion . The inner attachment portion is provided on the inner side in the vehicle width direction with respect to the third skeleton member or the third skeleton member, and the skeleton member of the vehicle seat is attached to the upper side in the vehicle body vertical direction with respect to the third skeleton member. The vehicle body panel structure according to claim 9, further comprising a fixing member to which the connecting member is attached at a lower side in a vehicle vertical direction with respect to the third skeleton member . Wherein the first frame member, rather than the vehicle width direction outer end of the vehicle seat is disposed in the vehicle width direction inside, claims 1 to have a recess for constituting the laying path of the pipe which extends in the longitudinal direction of the vehicle body Item 11. The vehicle body panel structure according to any one of Items 10 . The outer ends in the vehicle width direction of the pair of panel members are respectively extended upward in the vehicle body vertical direction and overlapped with each other to form a superposed portion,
The vehicle body panel structure according to any one of claims 1 to 11, wherein the overlapping portion includes an inclined portion that is inclined such that an upper side in a vertical direction of the vehicle body is positioned on an outer side in a vehicle width direction with respect to a lower side . The inclined portion of the overlapping portion is formed on the rocker extending in the vehicle longitudinal direction at the vehicle width direction outer end of the vehicle floor portion with respect to the inclined surface formed to face the vehicle width direction inner side and the vehicle body vertical direction upper side. It is arranged to overlap in the vertical direction and the vehicle width direction,
The vehicle body panel structure according to claim 12 , further comprising a cover panel that covers the pair of panel members and the rocker from below in the vehicle body vertical direction .

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