JP2010052509A - Car body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a car body structure, in which, when a reinforcing member is joined to a car body frame member by a foamed material, the reinforcing member is temporarily located while being positioned relative to the car body frame member, and the foamed material is foamed almost uniformly. <P>SOLUTION: This car body structure 10 comprises: a car body frame member 12 with a closed section structure having a space inside; a reinforcing member 30 extending inside the car body frame member 12 in a longitudinal direction of the car body frame member 12; a supporting part 13 formed in the longitudinal direction of the car body frame member 12, on which the reinforcing member 30 is provided, so that the reinforcing member 30 can be temporarily located; a plurality of projection parts 36, 38 formed at a predetermined interval in the longitudinal direction of the reinforcing member 30 and capable of contacting the supporting part 13; and a foamed material 40 provided between the reinforcing member 30 and the car body frame member 12 and combining the reinforcing member 30 with the car body frame member 12 under a foamed condition. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle body structure in which a reinforcing member is disposed inside a vehicle body skeleton member having a closed cross-sectional structure such as a front side member, and the reinforcing member is coupled to the vehicle body skeleton member by a foam material.

A reinforcing member is provided in the longitudinal direction of the vehicle body skeleton member having a closed cross-sectional structure such as a front side member and a center pillar, and the reinforcing member and the vehicle body skeleton member are provided in the longitudinal direction of the vehicle body skeleton member (reinforcing member). 2. Description of the Related Art A vehicle body structure formed by joining together foamed materials has been known (see, for example, Patent Document 1).
JP 2003-226261 A

  By the way, when the reinforcing member is not fixed to the vehicle body skeleton member and the reinforcing member is coupled to the vehicle body skeleton member by the foam material, it is necessary to temporarily place the reinforcing member while positioning the reinforcing member with respect to the vehicle body skeleton member. This is because it is necessary to foam the foam material substantially uniformly. That is, if the foamed material foams unevenly, the strength of the vehicle body skeleton member may vary.

  In view of the above circumstances, the present invention can temporarily place the reinforcing member while positioning the reinforcing member with respect to the vehicle body skeleton member when the reinforcing member is joined to the vehicle body skeleton member with the foam material. The object is to obtain a vehicle body structure that can be made.

  In order to achieve the above object, a vehicle body structure according to claim 1 of the present invention comprises a vehicle body skeleton member having a closed cross-sectional structure having a space inside, the vehicle body skeleton member, and the vehicle body skeleton member. A reinforcing member that extends in the longitudinal direction of the vehicle body, a support portion that can be temporarily placed in the longitudinal direction of the vehicle body skeleton member on which the reinforcing member is provided, and a longitudinal direction of the reinforcing member A plurality of protrusions formed at predetermined intervals in the direction and capable of contacting the support, and provided between the reinforcing member and the vehicle body skeleton member. And a foam material bonded to the vehicle body skeleton member.

  According to the first aspect of the present invention, the reinforcement member is temporarily placed while being positioned with respect to the support portion of the vehicle body skeleton member by the plurality of protrusions formed at predetermined intervals in the longitudinal direction of the reinforcement member. Can do. Therefore, a certain gap can be formed between the reinforcing member and the vehicle body skeleton member by this projection, and the foaming material for coupling the reinforcing member to the vehicle body skeleton member can be foamed substantially uniformly.

  The vehicle body structure according to claim 2 of the present invention has a space inside and extends in a pair of left and right in the longitudinal direction of the vehicle body, and the height of the vehicle body front side is higher than the height of the vehicle body rear side. A front side member that is bent so as to be higher, a reinforcing member that extends in the longitudinal direction inside the front side member and includes a bent portion on the vehicle body rear side of the front side member, and In the longitudinal direction of the front side member on which the reinforcing member is provided, a support portion formed so that the reinforcing member can be temporarily placed, and a predetermined interval in the longitudinal direction of the reinforcing member are formed and contacted with the support portion A plurality of protrusions made possible, and a foam material provided between the reinforcing member and the front side member, and connecting the reinforcing member to the front side member in a foamed state. It is characterized by a door.

  According to the second aspect of the present invention, the reinforcing member is temporarily placed while being positioned with respect to the support portion of the front side member by the plurality of protrusions formed at predetermined intervals in the longitudinal direction of the reinforcing member. Can do. Therefore, this protrusion can form a constant gap between the reinforcing member and the front side member, and the foaming material for connecting the reinforcing member to the front side member can be made to foam substantially uniformly. Further, since the reinforcing member is provided so as to extend in the longitudinal direction including the bent portion on the vehicle body rear side of the front side member, it is possible to improve the yield strength of the front side member with respect to the bending load.

  As described above, according to the present invention, when the reinforcing member is coupled to the vehicle body skeleton member with the foam material, the reinforcing member can be temporarily placed while being positioned with respect to the vehicle body skeleton member, and the foam material is substantially uniformly foamed. It is possible to provide a vehicle body structure.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described below in detail based on the embodiments shown in the drawings. FIG. 1 is a schematic perspective view showing a front side structure of a vehicle provided with a vehicle body structure 10 according to this embodiment, and FIG. 2 is a schematic side view of the same. 3 is a schematic perspective view of the reinforcing member 30, FIG. 4 is a schematic perspective view showing the front side member (vehicle body skeleton member) 12 provided with the reinforcing member 30, and FIG. 5 is a schematic sectional view of the same.

  6 is a schematic cross-sectional view showing a state where the reinforcing member 30 is coupled to the front side member (vehicle body skeleton member) 12 by the foam material 40, and FIG. 7 is a front side member (vehicle body) in which the reinforcing member 30 is not provided. It is a schematic sectional drawing of (skeleton member) 12. FIG. 8 is a schematic perspective view showing another reinforcing member 30 in which the position of the protrusion 38 is different. In each figure, the vehicle front direction is indicated by an arrow FR, and the vehicle upper direction is indicated by an arrow UP.

  As shown in FIG. 1, a pair of left and right front side members (vehicle body frame members) 12 extending in the longitudinal direction of the vehicle body are disposed at a predetermined interval in the vehicle width direction at the front portion of the vehicle. Each front side member 12 is formed in a hat shape in a cross-sectional view orthogonal to the longitudinal direction (see FIGS. 4 to 7). A front bumper reinforcement 14 extending in the vehicle width direction is installed at the vehicle body front side ends of the left and right front side members 12.

  Each front side member 12 is bent at two locations such that the front straight portion 12A on the front side of the vehicle body is higher than the rear straight portion 12C on the rear side of the vehicle body by a predetermined height. As shown in FIG. 2, an angle between a bent portion 16 on the front side of the vehicle body 12 and a bent portion 18 on the rear side of the vehicle body is obliquely upward in the front direction of the vehicle body (downward direction in the rear direction of the vehicle body) as viewed from the vehicle width direction. The inclined portion (kick portion) 12B is inclined to the right.

  A front floor panel 22 is provided on the vehicle body upper side of the rear straight portion 12C of each front side member 12. A floor tunnel (vehicle body skeleton member) 20 extending in the vehicle front-rear direction is formed at approximately the center of the front floor panel 22 in the vehicle width direction so as to be parallel to the front side members 12.

  Further, a dash panel 24 connected to the front floor panel 22 is provided on the front side of the vehicle body from the front floor panel 22 so as to extend upward in front of the vehicle body along the inclined portion 12B of the front side member 12. ing. A dash cross member 26 extending in the vehicle width direction is arranged on the vehicle body front side of the dash panel 24, and a surface of the dash panel 24 facing the vehicle body front side is attached to the dash cross member 26. ing. Thereby, the dash panel 24 is reinforced by the dash cross member 26.

  As shown in FIGS. 5 to 7, the flange portion 17 of the front side member 12, the front floor panel 22 and the dash panel 24 are fixed by spot welding, and the front side member 12 has a closed cross-sectional structure. ing. Note that a flange portion 28A of the front side member apparel reinforcement 28 is fixed to the flange portion 17 of the front side member 12 on the front side of the vehicle body from the dash panel 24 by spot welding, and similarly has a closed cross-sectional structure. (See FIG. 1).

  As shown in FIGS. 1 to 6, the cross section orthogonal to the longitudinal direction of the front side member 12 is provided inside the inclined portion 12 </ b> B and the rear straight portion 12 </ b> C of the front side member 12 including the bent portion 18 on the vehicle body rear side. A reinforcing member (reinforcement) 30 having a predetermined length is provided which is formed in a substantially inverted “U” shape when viewed from the side and is bent so as to follow the shape of the bent portion 18 when viewed from the side.

  This reinforcing member 30 reinforces the vehicle body upper side of the inclined portion 12B including the bent portion 18 of the front side member 12 and the rear straight portion 12C. Therefore, at least on the vehicle body upper side in the vehicle width direction both ends of the front side member 12 near the bent portion 18 where the reinforcing member 30 is provided, the step portion 13 as a support portion on which the reinforcing member 30 is temporarily placed while being positioned. Is formed.

  That is, the step portion 13 is formed to bend so that the vehicle body upper side at both ends in the vehicle width direction of the front side member 12 extends outward in the vehicle width direction, and a reinforcing member 30 described later is formed on the upper surface 13A and the inner side surface 13B. The protrusions 36 formed on the lower surface 34A of the leg 34 and the protrusions 38 formed on the outer surface 34B are in contact with each other.

  The reinforcing member 30 is formed of a resin material in order to reduce the weight of the front side member 12, and is connected to the front floor panel 22, the dash panel 24, and the front side member 12 by a foam material 40 to be described later. It has become. In addition, as a resin material which shape | molds the reinforcement member 30, resin materials with comparatively high intensity | strength, such as a resin material containing ABS, PC, glass fiber, are suitable, for example.

  Further, as shown in detail in FIG. 3, the reinforcing member 30 is integrally bent at the vehicle width direction both ends of the flat plate-like main body portion 32 and the main body portion 32 (so as to be bent at approximately 90 degrees). And a plurality of protrusions 36 are formed on the lower surface 34A of the leg portion 34 at predetermined intervals in the longitudinal direction (at equal intervals). Yes.

  The protrusion 36 is formed in a rectangular shape integrally with the lower surface 34A of the leg portion 34 of the reinforcing member 30, and comes into contact with the upper surface 13A of the stepped portion 13 of the front side member 12, so that the front side member 12, the reinforcing member 30 is positioned in the vertical direction of the vehicle body.

  On the other hand, a plurality of protrusions 38 are formed on the outer side surface 34B of the leg portion 34 of the reinforcing member 30 at regular intervals (equal intervals) in the longitudinal direction. The protrusion 38 is formed integrally with the outer side surface 34B of the leg portion 34 of the reinforcing member 30 in a rectangular shape, and comes into contact with the inner side surface 13B of the stepped portion 13 of the front side member 12, thereby The reinforcing member 30 is positioned in the side member 12 in the vehicle width direction.

  That is, as a result, as shown in FIGS. 4 and 5, when the reinforcing member 30 is disposed inside the front side member 12, the reinforcing member 30 moves in the vertical direction of the vehicle body and the vehicle with respect to the front side member 12. It is the structure temporarily placed, positioning in the width direction. In this state, the foaming material 40 is foamed, so that the reinforcing member 30 is coupled to the front side member 12.

  The foam material 40 includes a foamable material, and has a characteristic of being foamed and cured by heating. The foam material 40 is provided by being applied to the outer surface of the reinforcing member 30, that is, the upper surface 32A of the main body 32 and the outer surface 34B of the leg 34 (including the outer surface of the protrusion 36). It is supposed to be.

  Therefore, when the reinforcing member 30 to which the foam material 40 is applied is provided inside the front side member 12 and heated, as shown in FIG. It is coupled to the front floor panel 22 and the dash panel 24, and substantially the entire outer surface 34 </ b> B of the leg portion 34 of the reinforcing member 30 is coupled to the front side member 12.

  Next, the operation of the vehicle body structure 10 configured as described above will be described. First, a process of joining the reinforcing member 30 to the front side member 12 and the like by the foam material 40 will be described. A foam material 40 is applied in advance to the outer surface of the reinforcing member 30 (the upper surface 32A of the main body 32 and the outer surface 34B of the leg portion 34), and the reinforcing member 30 to which the foam material 40 is applied is the front side member. 12 is arranged.

  That is, the protrusion 36 formed on the lower surface 34A of the leg 34 of the reinforcing member 30 is brought into contact with the upper surface 13A of the step 13 of the front side member 12, and the inner surface 13B of the step 13 of the front side member 12 is contacted. Further, the reinforcing member 30 is disposed in the front side member 12 in a state in which the protrusions 38 formed on the outer side surface 34B of the leg portion 34 of the reinforcing member 30 are in contact with each other.

  Accordingly, the reinforcing member 30 is temporarily placed with respect to the step portion 13 of the front side member 12 while being positioned in the vehicle body vertical direction and the vehicle width direction. At this time, a predetermined gap S <b> 1 is formed between the lower surface 34 </ b> A of the leg 34 of the reinforcing member 30 and the upper surface 13 </ b> A of the stepped portion 13 of the front side member 12 by the protrusion 36. A predetermined gap S2 is formed between the outer side surface 34B of the leg portion 34 of the member 30 and the inner side surface 13B of the stepped portion 13 of the front side member 12 (see FIGS. 4 and 5).

  When the reinforcing member 30 is temporarily placed while being positioned in the front side member 12 in this way, the front floor panel 22 and the dash panel 24 are welded to the flange portion 17 of the front side member 12. At this time, a predetermined gap S3 is formed between the upper surface 32A of the main body 32 of the reinforcing member 30 and the lower surfaces 22A and 24A of the front floor panel 22 and the dash panel 24 (see FIG. 5).

  Then, the front side member 12 is heated from the outside. Then, the foam material 40 applied to the outer side surface 34B of the leg portion 34 of the reinforcing member 30 foams, expands toward the inner side surface 13B of the stepped portion 13 and fills the gaps S1 and S2, and the reinforcing member 30 The foam material 40 applied to the upper surface 32A of the main body 32 is foamed, expands toward the lower surfaces 22A and 24A of the front floor panel 22 and the dash panel 24, and fills the gap S3 (see FIG. 6).

  Then, after the foam material 40 is cured, the reinforcing member 30 is coupled to the inner side surface 13B of the stepped portion 13 and the lower surfaces 22A and 24A of the front floor panel 22 and the dash panel 24. At this time, the plurality of protrusions 36 formed on the lower surface 34A of the leg portion 34 of the reinforcing member 30 and the plurality of protrusions 38 formed on the outer surface 34B are spaced apart from each other by a predetermined distance in the longitudinal direction. (Equal intervals).

  Therefore, the gaps S1 and S2 between the projections 36 and between the projections 38 are also formed at regular intervals (equal intervals) in the longitudinal direction. Therefore, the foam material 40 can be foamed substantially uniformly in the longitudinal direction of the reinforcing member 30 not only on the front floor panel 22 or the dash panel 24 side but also on the stepped portion 13 side (filled substantially uniformly). . Therefore, the strength of the front side member 12 does not vary (the strength unevenness due to the difference in the filling amount of the foam material 40 does not occur).

  Thus, according to the front side member 12 reinforced by the reinforcing member 30, even when a collision load is received from the front side of the vehicle body (front bumper reinforcement 14 side) at the time of a frontal collision of the vehicle, the collision load is satisfactorily received. (Absorb). Then, next, an effect | action when a vehicle collides front is demonstrated.

  When a vehicle collides with a barrier (not shown) or the like, the impact (collision load) is transmitted to the front side member 12 via the front bumper reinforcement 14. At this time, the vehicle body upper side of the inclined portion 12B including the bent portion 18 on the rear side of the vehicle body and the rear linear portion 12C inside the front side member 12 is substantially reversed “U” in a cross-sectional view orthogonal to the longitudinal direction. A reinforcing member 30 in the shape of a letter is provided in the longitudinal direction along the shape of the front side member 12 (bending portion 18), and is coupled to the front side member 12, the front floor panel 22 and the dash panel 24 by the foam material 40. Has been.

  Therefore, the front side member 12 has improved resistance to a bending load that bends the inclined portion 12B rearward on the vehicle body. Therefore, the front side member 12 is difficult to bend and deform in the longitudinal direction of the vehicle body (longitudinal direction) with respect to the collision load at the time of a frontal collision of the vehicle, and can satisfactorily receive the collision load in the axial direction.

  The collision load mainly travels near the ridgeline of the front side member 12, but at least the ridgeline of the front side member 12 near the bent portion 18 where the reinforcing member 30 is provided is increased by the stepped portion 13. (See FIGS. 2 and 4 to 6). Therefore, the load transmission efficiency in the vicinity of the bent portion 18 of the front side member 12 is improved as compared with the vicinity of the bent portion 16 in which the step portion 13 is not formed (see FIGS. 2 and 7).

  Therefore, the front side member 12 is configured to be more difficult to bend and deform in the vehicle longitudinal direction (longitudinal direction) with respect to the collision load at the time of frontal collision of the vehicle, and the collision load is further improved in the axial direction. It can be received by. That is, according to such a configuration, the impact (collision load) at the time of a frontal collision of the vehicle is satisfactorily absorbed by the front side member 12, so that deformation of the passenger compartment (not shown) is further suppressed or prevented. Become.

  As mentioned above, although the vehicle body structure 10 according to the present invention has been described based on the embodiment shown in the drawings, the present invention is not limited to the illustrated embodiment, and is appropriately designed within the scope of the present invention. It can be changed. For example, the protrusions 38 formed on the outer surface 34B of the leg 34 of the reinforcing member 30 are limited to those formed at the same position in the longitudinal direction as the protrusions 36 formed on the lower surface 34A, as shown in FIG. Instead of this, as shown in FIG. 8, a configuration may be adopted in which the protrusions 36 are formed in the longitudinal direction.

  However, as shown in FIG. 3, when the protrusion 36 is formed directly below the protrusion 38, the area of the foam 40 applied directly below the protrusion 38 is larger than that shown in FIG. 8. Since it can ensure, it is preferable. Moreover, the shape of each protrusion part 36 and 38 is not limited to the rectangular shape of illustration, If it is a shape which can form fixed gap | interval S1 and S2 between the level | step-difference parts 13, for example, a substantially elliptical shape etc. May be formed.

  Moreover, in the said Example, although the reinforcement member 30 was provided in the inside of the front side member 12 (bending part 18), and it was set as the structure connected with the foam material 40, the reinforcement member 30 is provided in the inside of the floor tunnel 20, for example, it foams. It is good also as a structure connected with the material 40 (illustration omitted). According to this, the impact (collision load) at the time of a frontal collision can be absorbed more favorably by the floor tunnel 20.

Schematic perspective view showing a front side structure of a vehicle having a vehicle body structure Schematic side view showing a front side structure of a vehicle having a vehicle body structure Schematic perspective view of reinforcing member Schematic perspective view showing a front side member (vehicle body frame member) provided with a reinforcing member Schematic sectional view showing a front side member (vehicle body frame member) provided with a reinforcing member Schematic sectional view showing a state in which the reinforcing member is coupled to the front side member (vehicle body frame member) by the foam material Schematic cross-sectional view of the front side member (vehicle body skeleton member) without a reinforcing member The schematic perspective view which shows another reinforcement member from which the position of a projection part differs

Explanation of symbols

10 Body structure 12 Front side member (body frame member)
13 Step part (support part)
14 Front bumper reinforcement 16 Bending part 18 Bending part 20 Floor tunnel (body frame member)
22 Front Floor Panel 24 Dash Panel 26 Dash Cross Member 28 Front Side Member Appearance 30 Reinforcing Member 32 Body 34 Leg (Supported)
36 Projection 38 Projection 40 Foam

Claims (2)

A vehicle body skeleton member having a closed cross-sectional structure having a space inside;
A reinforcing member provided inside the body frame member and extending in the longitudinal direction of the body frame member;
A support portion formed so that the reinforcing member can be temporarily placed in the longitudinal direction of the vehicle body skeleton member provided with the reinforcing member;
A plurality of protrusions formed at predetermined intervals in the longitudinal direction of the reinforcing member, and capable of contacting the support portion;
A foaming material provided between the reinforcing member and the vehicle body skeleton member, the foaming material coupling the reinforcing member to the vehicle body skeleton member in a foamed state;
Body structure characterized by comprising A front side member that has a space inside and extends in a pair of left and right in the longitudinal direction of the vehicle body, and is bent so that the height of the vehicle body front side is higher than the height of the vehicle body rear side;
A reinforcing member provided to extend in the longitudinal direction inside the front side member and including a bent portion on the vehicle body rear side of the front side member;
A support portion formed so that the reinforcing member can be temporarily placed in the longitudinal direction of the front side member provided with the reinforcing member;
A plurality of protrusions formed at predetermined intervals in the longitudinal direction of the reinforcing member, and capable of contacting the support portion;
A foam material provided between the reinforcing member and the front side member, and in a foamed state, couples the reinforcing member to the front side member;
Body structure characterized by comprising

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