JP2019098706A - Vehicle skeleton member - Google Patents

Abstract

To provide a vehicle skeleton member capable of maintaining strengths necessary in accordance with a position in a member.SOLUTION: A vehicle skeleton member 12 made from a fiber-reinforced resin contains: a first fiber 40 which is a fiber arranged in a resin constituting the vehicle skeleton member 12 and is arranged in one or both of the longer direction and the direction orthogonal to the longer direction of the vehicle skeleton member 12; and a second fiber 42A which is a fiber arranged in a resin constituting the vehicle skeleton member 12 and is arranged in a part including peripheries of open holes 22A1, 22B1 for coupling with the vehicle body and along the orientation direction approximately 45 degree to the longer direction of the vehicle skeleton member 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle frame member.

  In Patent Document 1 below, a plurality of FRP materials, each of which is formed into a hollow elongated shape and whose cross-sectional shape viewed in the longitudinal direction is a polygonal shape, are configured by being joined by sides shared with each other A hollow frame vehicle frame member is disclosed. According to this, it is possible to form vehicle frame members of various cross-sectional structures without using a complicated core or mold.

JP, 2008-173782, A

  However, the hollow structure constituting the vehicle frame member described in Patent Document 1 can be formed only by winding a woven fabric around a core metal or by weaving around a core metal by a braiding technique. When a bending load is applied to the vehicle frame member, the strength required to withstand the bending load varies depending on the position in the member. For this reason, if the vehicle frame member described in Patent Document 1 can be adapted to a locally increasing bending load, the weight and number of parts of the frame for securing the necessary strength increase, and the cost increases further. It also leads to From this, there is room for improvement in the vehicle frame member in order to secure the necessary strength according to the position in the member.

  An object of the present invention is to obtain a vehicle frame member capable of securing a necessary strength according to the position in the member in consideration of the above-mentioned facts.

  The vehicle frame member according to claim 1 is a vehicle frame member made of fiber reinforced resin, and is a fiber disposed in a resin constituting the frame, and one of the longitudinal direction of the frame and the direction orthogonal to the longitudinal direction Or a first fiber disposed along both of them and a fiber disposed in the resin constituting the skeleton, in a portion including the periphery of a through hole for fastening to a vehicle body, with respect to the longitudinal direction of the skeleton And a second fiber disposed along an orientation direction of about 45 degrees.

  According to the vehicle frame member of the first aspect, the first fiber is disposed on the resin constituting the frame along one or both of the longitudinal direction of the vehicle frame member and the direction orthogonal to the longitudinal direction. Thereby, when a bending load acts on a vehicle frame member, the required strength with respect to the tensile stress and compression stress which arise in the cross section of a vehicle frame member can be ensured.

  Further, according to the vehicle frame member according to claim 1, in the portion of the resin constituting the frame including the periphery of the through hole of the vehicle frame member, the orientation direction of about 45 degrees with respect to the longitudinal direction of the vehicle frame member The second fibers are arranged along the The through hole is a portion into which the fastener is inserted and the vehicle frame member and the other frame and the like are fastened, so that the periphery of the through hole is likely to receive loads from various directions. Moreover, since stress concentration occurs around the through hole, high stress is likely to occur. For this reason, in the vehicle frame member according to the present invention, the second fiber is disposed along the orientation direction of about 45 degrees with respect to the longitudinal direction of the vehicle frame member, so that the load is not only its action direction but also the vehicle frame It is dispersed in the direction of approximately 45 degrees with respect to the longitudinal direction of the member. Thereby, a load acts from various directions, and necessary strength can be secured even in a portion including the periphery of the through hole where high stress is likely to occur.

  As described above, the vehicle frame member according to the present invention has the excellent effect of being able to secure the necessary strength according to the position in the member.

It is the schematic perspective view which looked at the roof center reinforcement which used the vehicle frame member concerning 1st Embodiment from the vehicle upper direction. It is the schematic plan view which looked at the roof center reinforcement which used the vehicle frame member concerning 1st Embodiment from the vehicle upper direction. It is the schematic sectional drawing which looked at the state from which the roof center reinforcement was cut | disconnected along the AA shown by FIG. 1 from the vehicle side. It is the schematic sectional drawing which looked at the state from which the roof center reinforcement was cut | disconnected along the BB line shown by FIG. 2 from the vehicle side. It is the schematic perspective view which looked at the vehicle floor structure comprised including the floor cross member using the rocker outer which used the vehicle frame member concerning a 2nd embodiment, and the vehicle frame member concerning a 3rd embodiment from the vehicle front. . FIG. 6 is a schematic cross-sectional view of the state in which the locker is cut along the line C-C shown in FIG. 5 as viewed from the front of the vehicle. FIG. 6 is a schematic cross-sectional view of the state in which the floor cross member is cut along the line D-D shown in FIG. 5 as viewed from the side of the vehicle.

First Embodiment
Hereinafter, a vehicle frame member according to a first embodiment of the present invention will be described using FIGS. 1 to 4. In the following drawings, the arrow FR indicates the vehicle front side, the arrow IN indicates the vehicle width direction inner side, and the arrow UP indicates the vehicle upper side.

  1 and 2 show a roof center reinforcement 12 as a vehicle frame member according to the first embodiment. As shown in FIG. 1, a metal joint plate 18 is riveted to both ends in the vehicle width direction of the roof center reinforcement 12 in which the vehicle width direction is the longitudinal direction. The roof center reinforcement 12 straddles the roof side rail by being joined to a roof side rail (not shown) extended in the vehicle longitudinal direction on both outer sides in the vehicle width direction of the upper portion of the vehicle via a joint plate 18. It arrange | positions along the vehicle width direction below the vehicle of the roof panel (illustration omitted) arrange | positioned.

  The joint plate 18 includes a front joint flange 18A on the front side of the vehicle and a rear joint flange 18B on the rear side of the vehicle on the vehicle upper side, and a bottom plate 18C on the vehicle lower side. It is shaped like a hat. The roof center reinforcement 12 is riveted to the inside in the vehicle width direction of the front joint flange portion 18A and the rear joint flange portion 18B. Further, a portion (not shown) in which the outer side in the vehicle width direction and the bottom plate portion 18C of the front joint flange portion 18A and the rear joint flange portion 18B extend outward in the vehicle width direction is joined to the roof side rail by spot welding or the like. ing.

  As shown in FIGS. 3 and 4, a first plate portion 22 and a second plate portion 24 extended in the vehicle width direction are respectively provided on the vehicle upper side and the vehicle lower side of the roof center reinforcement 12. There is. In the roof center reinforcement 12, a first wall portion 26 extending from the vehicle front end of the second plate portion 24 to the vehicle upper side and the vehicle front side to the first plate portion 22; A second wall portion 28 extending from the vehicle rear end of the plate portion 24 to the vehicle upper side and the vehicle rear side to the first plate portion 22 is provided. The first plate portion 22 and the second plate portion 24 are connected via the first wall portion 26 and the second wall portion 28. Thereby, the external shape of the roof center reinforcement 12 is formed in a reverse hat shape in a side view.

  The first plate portion 22 has a first flange portion 22A on the front side of a portion where the first plate portion 22 and the first wall portion 26 are joined, and the first plate portion 22 and the second wall portion 28 The vehicle rear side is made into the 2nd flange part 22B rather than the connected part. Further, a portion connecting the first flange portion 22A and the second flange portion 22B is referred to as a first central portion 22C.

  As shown in FIGS. 1 and 2, at both ends in the vehicle width direction of the first flange portion 22A and the second flange portion 22B, first through holes 22A1 and second as through holes penetrated in the vehicle vertical direction. A through hole 22B1 is provided. The roof center reinforcement 12 is fastened to the joint plate 18 by the rivets 30 inserted into the first through holes 22A1 and the second through holes 22B1.

  As shown in FIGS. 3 and 4, the thickness T2 of the second plate portion 24 is the thickness T1 of the first central portion 22C, and the first flange portion 22A and the second flange portion 22B formed substantially the same. It is formed thicker than board thickness T3. Further, the thickness T1 of the first central portion 22C is thinner than the thickness T3 of the first flange portion 22A and the second flange portion 22B which are formed substantially the same.

  In the center portion 32 of the roof center reinforcement 12, there is formed a space which is extended in the vehicle width direction and in which the outer shape of the cross section cut in the vehicle longitudinal direction and the vehicle vertical direction is formed into a substantially trapezoidal shape. The first rib extends in the vehicle width direction and the vehicle vertical direction substantially at the center of the center 32 in the vehicle longitudinal direction, and the upper end and the lower end are respectively connected to the first plate 22 and the second plate 24 34 are provided. The vehicle front side of the first rib 34 of the central portion 32 is a first space portion 32A, and the vehicle rear side of the first rib 34 of the central portion 32 is a second space portion 32B.

(Operation and effect of the first embodiment)
Next, the operation and effects of the present embodiment will be described.

  The roof center reinforcement 12 is formed by RTM (Resin Transfer Molding) molding. In RTM molding, a thermosetting resin injected from a resin injection port provided in a mold is used to close the mold in a state in which reinforcing fibers are disposed in a pair of molds of a female mold and a male mold. It is the method of shape | molding by making the reinforced fiber impregnate the epoxy resin which is.

  The roof center reinforcement 12 has a wind-off structure in which the cross-sectional shape cut in the longitudinal direction of the vehicle and the vertical direction of the vehicle is formed in a constant shape. Further, the sectional shapes of the first space portion 32A and the second space portion 32B cut in the vehicle longitudinal direction and the vehicle vertical direction are such that portions in contact with the first wall portion 26 and the second wall portion 28 are respectively oblique sides It is formed in a substantially trapezoidal shape. For this reason, when forming the roof center reinforcement 12, it is possible to provide a draft on the cored bar disposed in the portion corresponding to the first space portion 32A and the front space portion 32B. Thereby, extraction of the cored bar after molding of the roof center reinforcement 12 is facilitated, and the roof center reinforcement 12 can be stably formed.

  Further, the roof center reinforcement 12 can be mechanically formed by being formed by RTM molding. Thereby, the quality of the molded roof center reinforcement 12 can be stabilized, and the working environment can be improved by the molding method which is molded in a closed state in which the mold is closed.

  Here, the roof center reinforcement 12 is described as being formed by RTM molding, but the roof center reinforcement may be formed by another forming method such as pultrusion molding.

  In addition, although an epoxy resin is used as a thermosetting resin here, the present invention is not limited to this, and another resin may be used according to the purpose, for example, unsaturated polyester resin, phenol resin And vinyl ester resins and urethane resins.

  A carbon fiber is used as a reinforcing fiber disposed inside the epoxy resin which is a thermosetting resin constituting the roof center reinforcement 12 and for improving the strength of the roof center reinforcement 12. Over the entire interior of the roof center reinforcement 12, a first fiber 40 formed of carbon fiber of continuous fiber material is disposed along the longitudinal direction of the roof center reinforcement 12.

  On the upper side of the first fiber 40 disposed in the vehicle width direction both ends including the periphery of the first through hole 22A1 and the second through hole 22B1 of the first plate portion 22, the first of the carbon fibers of the continuous fiber material is A plain woven fabric 42 formed of the two fibers 42A is disposed from the first flange portion 22A to the second flange portion 22B. The flat woven fabric 42 is formed such that the width direction of the vehicle is the short direction, and the second fibers 42A are oriented at approximately 45 degrees with respect to the short width direction of the flat woven fabric 42. Thereby, the second fibers 42A are oriented so as to be approximately 45 degrees with respect to the longitudinal direction of the roof center reinforcement 12 in a state in which the plain woven fabric 42 is disposed inside the first plate portion 22. Here, “periphery” means a range that is affected by loads and stress concentration from various directions received through the through holes as described later.

  According to the roof center reinforcement 12 of the present embodiment, the first fibers 40 are disposed along the longitudinal direction of the roof center reinforcement 12. Therefore, when the bending load acts on the roof center reinforcement 12, the orientation direction of the first fiber 40 is substantially the same as the direction in which the tensile stress and the compressive stress generated in the cross section of the roof center reinforcement 12 act. ing. This makes it possible to secure strength against tensile stress and compressive stress caused by the bending load acting on the roof center reinforcement 12.

  The first through holes 22A1 and the second through holes 22B1 are portions where the rivets 30 are inserted and fastened with the joint plate 18, and receive loads from various directions. In addition, since stress concentration occurs around the first through holes 22A1 and the second through holes 22B1, high stress occurs around the through holes 22A1, 22B1.

  According to the roof center reinforcement 12 of the present embodiment, both end portions in the vehicle width direction of the first plate portion 22 including the first through holes 22A1 and the second through holes 22B1 with respect to the longitudinal direction of the roof center reinforcement 12 The second fibers 42A are disposed along the orientation direction of about 45 degrees. Therefore, the load acting on the periphery of the first through hole 22A1 and the second through hole 22B1 by the second fibers 42A oriented at about 45 degrees with respect to the longitudinal direction of the roof center reinforcement 12 is only the action direction Instead, they are dispersed in the direction of approximately 45 degrees with respect to the longitudinal direction of the roof center reinforcement 12. As a result, a load can be applied from various directions, and a necessary strength can be secured without providing a reinforcing member or locally increasing the plate thickness around the through holes 22A1 and 22B1 where high stress is likely to occur. .

  In addition, although it demonstrated that carbon fiber was altogether used for a reinforced fiber here, according to the objective, it may be reinforced using other fiber not only this but glass fiber, as an example, Examples thereof include metal fibers and aramid fibers, cellulose fibers, nylon fibers, vinylon fibers, polyester fibers, polyolefin fibers, and resin fibers of rayon fibers.

  In addition, although it has been described here that the flat fabric 42 is formed by the second fibers 42A, the present invention is not limited to this, and may be formed in another form according to the purpose. For example, mat, roving, UD (One direction) A sheet etc. are mentioned.

  Furthermore, although it has been described here that the first fiber 40 is a carbon fiber of continuous fiber material, the present invention is not limited thereto, and one or both of the longitudinal direction of the roof center reinforcement and the direction orthogonal to the longitudinal direction Short fiber carbon fibers may be used.

  As described above, the roof center reinforcement 12 as the vehicle frame member according to the present embodiment can ensure the necessary strength according to the position in the member.

  Furthermore, in addition to the above, according to the roof center reinforcement 12 of the present embodiment, the first flange in which the thickness T2 of the second plate portion 24 is substantially the same as the thickness T1 of the first central portion 22C. By setting the plate thickness T3 of the portion 22A and the second flange portion 22B thicker, it is possible to suppress an increase in stress generated in the second plate portion 24.

  In the structure in which the first flange portion 22A and the second flange portion 22B are provided to the first plate portion 22 as in the roof center reinforcement 12 of the present embodiment, the first plate portion 22 and the second plate portion 24 are provided. When the plate thickness is substantially the same, the neutral axis N with respect to the bending load is set closer to the first plate portion 22 than the middle portion between the first plate portion 22 and the second plate portion 24. For this reason, in the second plate portion 24 in which the distance from the neutral axis is long, the acting bending load is larger than that on the first plate portion 22 side, and the stress generated thereby is also high.

  According to the roof center reinforcement 12 of the present embodiment, the first flange portion 22A and the second flange portion 22B are formed such that the thickness T2 of the second plate portion 24 is substantially the same as the thickness T1 of the first central portion 22C. The position of the neutral axis N is made closer to the side of the second plate portion 24 as compared to the case where the thickness T2 of the second plate portion 24 is not increased by being formed thicker than the plate thickness T3 of be able to. For this reason, the bending load which acts on the 2nd board part 24 can be controlled, and it can distribute to the 1st board part 22 side. Further, by providing the first rib 34 in the central portion 32, the strength against bending load of the first plate portion 22 and the second plate portion 24 can be improved. By these things, it can suppress that a stress becomes high while suppressing that a bending load becomes large as the roof center reinforcement 12 whole.

Second Embodiment
Next, a locker outer 50 as a vehicle frame member according to a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. The same components as those in the first embodiment described above are denoted by the same reference numerals and the description thereof will be omitted.

  In FIG. 5, the vehicle floor side of the vehicle floor 54 cut along the vehicle width direction and the vehicle vertical direction on the vehicle front side of the B pillar 52 extended in the vehicle vertical direction on the vehicle width direction outer side of the vehicle central portion A schematic perspective view from the side is shown. The vehicle body floor 54 is constituted by a floor panel 62 bridged between a pair of left and right rockers 58 extending in the vehicle longitudinal direction at the vehicle lower side and both ends in the vehicle width direction.

  In the rocker 58, a region on the vehicle width direction inner side of the rocker 58 is configured, and a rockery panel 64 disposed at the lower portion of the vehicle with the longitudinal direction of the vehicle as a longitudinal direction, and a region on the vehicle width direction outer side of the rocker 58 are configured. A rocker outer panel 66 is provided at a lower portion of the vehicle, the longitudinal direction being a longitudinal direction of the vehicle.

  The rocker panel 64 has a cross-sectional shape cut in the vertical direction of the vehicle and the width direction of the vehicle substantially in a hat shape in a front view, and is opened outward in the vehicle width direction. In the rocker panel 64, a wall portion 64A having a U-shaped cross section projecting inward in the vehicle width direction and an upper flange portion extended to the vehicle upper side from the vehicle width direction outer end of the wall portion 64A on the vehicle upper side. A lower flange portion 64C extends from the vehicle width direction outside end of the wall portion 64A on the vehicle lower side to the vehicle lower side.

  The rocker outer panel 66 has a cross-sectional shape cut in the vertical direction of the vehicle and the width direction of the vehicle substantially in a hat shape in a front view, and is opened inward in the vehicle width direction. In the rocker outer panel 66, a wall portion 66A having a U-shaped cross section that protrudes outward in the vehicle width direction, and an upper flange portion 66B extended to the vehicle upper side from the vehicle width direction inner end of the wall portion 66A on the vehicle upper side. And a lower flange portion 66C extending from the vehicle width direction inner side end of the wall portion 66A on the vehicle lower side toward the vehicle lower side.

  FIG. 5 shows a locker outer 50 as a vehicle frame member according to the second embodiment, which extends in the longitudinal direction of the vehicle on the inner side in the vehicle width direction of the rocker outer panel 66. The locker outer 50 is provided with a first plate portion 22 and a second plate portion 24 on the inner side and the outer side in the vehicle width direction. Further, in the locker outer 50, a first wall portion 26 extending from the lower end portion of the second plate portion 24 to the first plate portion 22 toward the vehicle lower side and the vehicle width direction inward, and the second plate portion 24 And a second wall portion 28 which extends from the upper end portion to the first plate portion 22 toward the upper side of the vehicle and the inner side in the vehicle width direction. The second plate portion 24 and the first plate portion 22 are connected via the first wall portion 26 and the second wall portion 28. Thus, the outer shape of the locker outer 50 is formed in a hat shape in a front view of the vehicle.

  The first plate portion 22 has the first flange portion 22A at the lower side of the vehicle than the portion where the first plate portion 22 and the first wall portion 26 are joined, and the first plate portion 22 and the second wall portion 28 The vehicle upper side is made into the 2nd flange part 22B rather than the connected part. Further, a portion connecting the first flange portion 22A and the second flange portion 22B is referred to as a first central portion 22C.

  As shown in FIG. 6, in the first flange portion 22A and the second flange portion 22B, a first through hole 22A1 and a second through hole 22B1 as a through hole penetrating in the vehicle width direction are the first flange portion. 22A and a plurality of second flanges 22B are provided at a plurality of locations spaced along the vehicle longitudinal direction. The locker outer 50 is provided with the upper flange portions 64B and 66B and the lower portion of the rocker panel 64 and the rocker outer panel 66 by the second rivet 68 (not shown in FIG. 5) inserted into the first through hole 22A1 and the second through hole 22B1. It is fastened with the flanges 64C and 66C. Thus, the rocker 58 is formed in a closed cross-sectional shape including the rocker outer 50 inside, with a cross section cut in the vehicle vertical direction and the vehicle width direction.

  The thickness T2 of the second plate portion 24 is larger than the thickness T1 of the first central portion 22C, and the thickness T3 of the first flange portion 22A and the second flange portion 22B which are formed substantially the same. Further, the thickness T1 of the first central portion 22C is thinner than the thickness T3 of the first flange portion 22A and the second flange portion 22B which are formed substantially the same.

  In the central portion 32 of the locker outer 50, a space extending in the vehicle longitudinal direction and having a substantially trapezoidal cross section cut in the vehicle vertical direction and the vehicle width direction is formed. The upper rib 72 extends in the vehicle width direction and the vehicle front-rear direction so that the central portion 32 is roughly divided into three, and both ends in the vehicle width direction are connected to the first plate 22 and the second plate 24 respectively. And a lower rib 74 is provided.

  The floor panel 62 is disposed between the pair of left and right rockers 58 by joining the vertical flange portion 62A formed at the outer end in the vehicle width direction to the wall portion 64A of the rocker panel 64. At a central portion in the vehicle width direction of the floor panel 62, there is provided a floor tunnel portion 62B which protrudes to the upper side of the vehicle and extends along the longitudinal direction of the vehicle. The floor panel 62 also includes a floor cross as a vehicle frame member according to a third embodiment, which is extended in the vehicle width direction so as to connect the wall portion 64A of the rocker panel 64 and the floor tunnel portion 62B. A member 82 is provided.

(Operation and effect of the second embodiment)
Next, the operation and effects of the present embodiment will be described.

  The locker outer 50 is formed by RTM molding, similarly to the roof center reinforcement 12 according to the first embodiment. For this reason, the locker outer 50 can be mechanically formed. As a result, the quality of the molded rocker outer 50 can be stabilized, and the working method can be improved by the molding method in which the mold is molded in a closed and closed state.

  Glass fibers are used as reinforcing fibers that are disposed inside the thermosetting resin that constitutes the locker outer 50 and that improve the strength of the locker outer 50. A first fiber 76 formed of a continuous fiber glass fiber is disposed along the longitudinal direction of the locker outer 50 throughout the interior of the locker outer 50.

  Formed by the second fiber 78A of the glass fiber of the continuous fiber material in the vehicle width direction inside of the first fiber 76 disposed in the portion including the periphery of the first through hole 22A1 and the second through hole 22B1 of the first plate portion 22 Glass mat 78 is disposed. The glass mat 78 is formed in a state in which the longitudinal direction of the vehicle is the lateral direction, and the second fibers 78A are oriented at approximately 45 degrees with respect to the lateral direction of the glass mat 78. Thereby, the second fibers 78A are oriented to be approximately 45 degrees with respect to the longitudinal direction of the locker outer 50 in a state where the glass mat 78 is disposed on the first plate portion 22.

  According to the locker outer 50 of the present embodiment, the first fibers 76 are disposed along the longitudinal direction of the locker outer 50. Therefore, the orientation direction of the first fiber 76 is the same as the direction in which the tensile stress and the compressive stress generated in the cross section of the rocker outer 50 act when the bending load due to the side impact load or the like acts on the rocker outer 50. be able to. This makes it possible to secure strength against tensile stress and compressive stress caused by the bending load acting on the rocker outer 50.

  Furthermore, according to the locker outer 50 of the present embodiment, the glass mat 78 formed of the second fibers 78A of the glass fiber of the continuous fiber material is disposed around the first through holes 22A1 and the second through holes 22B1. . For this reason, the load acting on the periphery of the first through hole 22A1 and the second through hole 22B1 is the rocker outer by the second fibers 78A arranged along the orientation direction of approximately 45 degrees with respect to the longitudinal direction of the locker outer 50 Dispersed in the direction of approximately 45 degrees with respect to the 50 longitudinal directions. As a result, load is applied from various directions, and reinforcement members are provided or the thickness of rocker outer 50 is not locally increased even in portions including the peripheral portions of through holes 22A1 and 22B1 where high stress is likely to occur. The strength can be secured.

  In addition, although it demonstrated that glass fiber was altogether used here as a reinforced fiber, it may be reinforced not only with this but using other fiber according to the objective, for example, a carbon fiber, Examples thereof include metal fibers and aramid fibers, cellulose fibers, nylon fibers, vinylon fibers, polyester fibers, polyolefin fibers, and resin fibers of rayon fibers.

  In addition, although it has been described that the glass mat 78 is formed of the second fibers 78A, the present invention is not limited to this, and may be formed in another form according to the purpose. UD (one direction) sheet etc. are mentioned.

  Furthermore, although the first fiber 76 has been described here as a continuous fiber glass fiber, the present invention is not limited thereto. The first fiber 76 may extend along one or both of the longitudinal direction and the longitudinal direction of the rocker outer. Short fiber glass fibers may be used.

  As described above, the locker outer 50 as the vehicle frame member according to the present embodiment can secure necessary strength according to the position in the member.

Third Embodiment
Next, a floor cross member 82 as a vehicle frame member according to a third embodiment of the present invention will be described using FIGS. 5 and 7. The same components as those in the first embodiment and the second embodiment described above are denoted by the same reference numerals, and the description thereof will be omitted.

  As shown in FIG. 5, the vehicle according to the third embodiment extends in the vehicle width direction which is the longitudinal direction in the floor panel 62 and connects the wall portion 64A of the rocker panel 64 and the floor tunnel portion 62B. A floor cross member 82 as a framework member is provided.

  As shown in FIG. 7, the floor cross member 82 is externally tightened by the third rivet 84 (not shown in FIG. 5) in a state where the first plate portion 22 is in contact with the floor panel 62. The roof center reinforcement 12 according to the first embodiment has substantially the same configuration as that of the roof center reinforcement 12 according to the first embodiment except for the fact that the roof center reinforcement 12 is substantially hat-shaped as viewed.

  Inside the thermosetting resin constituting the floor cross member 82, a first fiber 40 which is oriented in the longitudinal direction of the floor cross member 82 and is formed of carbon fiber of a continuous fiber material is disposed. It is formed by the second fiber 42A of the carbon fiber of the continuous fiber material on the vehicle lower side of the first fiber 40 disposed in the portion including the periphery of the first through hole 22A1 and the second through hole 22B1 of the first plate portion 22 A flat woven fabric 42 is disposed from the first flange portion 22A to the second flange portion 22B.

(Operation and effect of the third embodiment)
Next, the operation and effects of the present embodiment will be described.

  The floor cross member 82 is formed by pultrusion. In pultrusion, the reinforcing fiber is impregnated with a resin and drawn into a mold, and after being cured into a predetermined cross-sectional shape in the mold, it is drawn by a drawing device and cut into a predetermined length by cutting. This is a method of forming a molded product in a long length. Thereby, high strength can be secured without damaging the reinforcing fibers in the mold, and the floor cross member 82 can be mechanically mass-produced.

  According to the floor cross member 82 of the present embodiment, the first fibers 40 are disposed along the longitudinal direction of the floor cross member 82. For this reason, the orientation direction of the first fiber 40 is the same as the direction in which the tensile stress and the compressive stress generated in the cross section of the floor cross member 82 act when a load due to a side impact load or the like acts on the floor cross member 82. can do. This makes it possible to secure strength against tensile stress and compressive stress caused by the bending load acting on the floor cross member 82.

  Furthermore, according to the floor cross member 82 of the present embodiment, the orientation around the first through hole 22A1 and the second through hole 22B1 of the first plate portion 22 is approximately 45 degrees with respect to the longitudinal direction of the floor cross member 82. The second fibers 42A are disposed along the direction. Therefore, the load acting on the periphery of the first through hole 22A1 and the second through hole 22B1 by the second fibers 42A arranged along the orientation direction of about 45 degrees with respect to the longitudinal direction of the roof center reinforcement 12 Not only in the longitudinal direction of the floor cross member 82 but also in the direction of approximately 45 degrees with respect to the longitudinal direction of the floor cross member 82. As a result, load is applied from various directions, and even in portions including the peripheral portions of the through holes 22A1 and 22B1 where high stress is likely to occur, the floor cross members 82 are provided without providing reinforcing members or locally increasing the plate thickness. The strength of the

  As described above, the floor cross member 82 as the vehicle frame member according to the present embodiment can secure necessary strength according to the position in the member.

  Here, the vehicle frame member is described as being used for the roof center reinforcement 12, the locker outer 50, and the floor cross member 82. However, the vehicle frame member is not limited to this and, for example, substantially identical in the longitudinal direction like a side member. It may be used for members that are extended in thickness.

12 Roof center reinforcement (vehicle frame member)
22A1 first through hole (through hole)
22B1 second through hole (through hole)
40 first fiber 42A second fiber 50 rocker outer (vehicle frame member)
76 1st fiber 78A 2nd fiber 82 floor cross member (vehicle frame member)

Claims (1)

A fiber disposed in a resin constituting a skeleton, and a first fiber disposed along one or both of a longitudinal direction of the skeleton and a direction orthogonal to the longitudinal direction;
It is a fiber disposed in the resin constituting the skeleton, and is disposed along an orientation direction of about 45 degrees with respect to the longitudinal direction of the skeleton in a portion including the periphery of a through hole for fastening to a vehicle body Second fiber,
A vehicle frame member made of fiber reinforced resin, comprising: