JP2008260334A - FRP body structure - Google Patents

Abstract

An FRP body structure is provided that can sufficiently secure the adhesive strength between an underbody and a pillar separately molded by FRP.
A lower end side of a center pillar outer is extended from a lower end side of a center pillar inner 32 to a lower side of a vehicle body, and an adherend portion is formed on a vehicle width direction outside of a front end upper portion of left and right rear fender lower portions. And a bonded portion 46 that is offset to the lower side of the vehicle body and to the outer side in the vehicle width direction with respect to the bonded portion 42, thereby bonding the lower end portion of the center pillar inner 32 that is set on the inner side in the vehicle width direction. The portion 32D is bonded to the bonded portion 42, and the bonded portion 34C set on the inner side in the vehicle width direction of the lower end portion of the center pillar outer can be bonded to the bonded portion 46.
[Selection] Figure 3

Description

  The present invention relates to an FRP body structure.

  A configuration in which an entire automobile body is integrally formed of a resin material is known (for example, see Patent Document 1). However, in the case where the entire automobile body is integrally formed with FRP (fiber reinforced plastic), the cost increases due to the increase in size, complexity, and complexity of the molding die.

On the other hand, for example, when the underbody and the center pillar are divided and separately molded by FRP, and these are bonded together, it is necessary to take measures to sufficiently secure these bonding strengths.
Utility Model Registration No. 3108250

  An object of the present invention is to provide an FRP body structure that can sufficiently secure the adhesive strength between an underbody and a pillar separately molded by FRP in consideration of the above facts.

  The FRP body structure according to claim 1 includes a pair of left and right pillar inners constituting the inner side in the vehicle width direction of a pair of left and right FRP pillars extending from the left and right side portions of the FRP underbody to the upper side of the vehicle body. A pair of left and right pillar outers that form the outer side in the vehicle width direction of the pair of left and right pillars, the lower end extending from the lower end of the pillar inner to the vehicle body lower side, and the outer sides in the vehicle width direction of the left and right sides of the underbody A pair of left and right inner side bonded portions to which the lower end side of the pillar inner is bonded, and on the vehicle width direction outside of the left and right side portions of the underbody, on the vehicle body lower side and the vehicle And a pair of left and right outer side bonded portions to which the lower end side of the pillar outer is bonded.

  In the FRP body structure according to the first aspect, the pair of left and right FRP pillars extend from the left and right side portions of the FRP underbody upward from the vehicle body. An inner portion in the vehicle width direction of the pair of left and right pillars is constituted by a pair of left and right pillar inners, and an outer portion in the vehicle width direction of the pair of left and right pillars is constituted by a pair of left and right pillar outers.

  Here, the lower end side of the pillar outer is extended from the lower end portion of the pillar inner to the vehicle body lower side, and the inner side adherend portion and the inner side adherend portion are provided on the outer sides in the vehicle width direction of the left and right side portions of the underbody. And an outer side bonded portion that is offset to the vehicle body lower side and the vehicle width direction outer side. The lower end side of the pillar inner is bonded to the inner side bonded portion, and the lower end side of the pillar outer is bonded to the outer side covered portion. It is possible to bond to the bonding portion.

  That is, both the pair of left and right pillar inners and the pair of left and right pillar outers can be bonded to the left and right sides of the underbody, thereby ensuring a bonding area between the pair of left and right pillars and the underbody. It becomes possible to ensure the adhesive strength between the pair of pillars and the underbody.

  A FRP body structure according to a second aspect is the FRP body structure according to the first aspect, wherein the pair of left and right pillar inners are integrally formed.

  In the FRP body structure according to claim 2, the rigidity of the pillar inner is improved by integrally forming a pair of left and right pillar inners by FRP.

  The FRP body structure according to claim 3 is the FRP body structure according to claim 1 or 2, wherein the pair of left and right pillar outers are integrally formed.

  In the FRP body structure according to the third aspect, the rigidity of the pillar outer is improved by integrally forming the pair of left and right pillar outers by FRP.

  The FRP body structure according to claim 4 is the FRP body structure according to any one of claims 1 to 3, wherein the pillar inner part is bonded to the inner side bonded part, and The inner side bonded portion is formed in a step shape in the longitudinal direction of the vehicle body.

  In the FRP body structure according to claim 4, the inner side of the pillar inner is formed by forming the bonded portion of the pillar inner with the inner side bonded portion and the inner side bonded portion in a stepwise manner in the vehicle front-rear direction. The area of the bonded portion with the bonded portion and the inner bonded portion is increased, and the bonded area between the pillar inner and the underbody is increased.

  The FRP body structure according to claim 5 is the FRP body structure according to any one of claims 1 to 4, wherein the pillar outer is bonded to the outer side bonded portion, and The outer side adherend portion is formed in a step shape in the longitudinal direction of the vehicle body.

  In the FRP body structure according to claim 5, the bonding portion of the pillar outer with the outer side bonded portion and the outer side bonded portion are formed stepwise in the longitudinal direction of the vehicle body, so that the outer side of the pillar outer The area of the bonded portion with the bonded portion and the outer bonded portion is enlarged, and the bonded area between the pillar outer and the underbody is expanded.

  The FRP body structure according to claim 6 is the FPR body structure according to any one of claims 1 to 5, wherein the outer side bonded portion is separated from the design surface of the underbody by a vehicle width. It is characterized by a stepped portion that is recessed inward in the direction.

  In the FRP body structure according to claim 6, the outer side bonded portion is a stepped portion recessed inward in the vehicle width direction from the design surface of the underbody, so that the design surface of the pillar outer and the design surface of the underbody A level | step difference can be reduced and a design property can be improved.

  As described above, it is possible to provide an FRP body structure that can sufficiently secure the adhesive strength between the underbody and the pillar separately molded by FRP.

Next, one embodiment of the FRP body structure of the present invention will be described with reference to FIGS.
In the figure, the arrow FR indicates the vehicle body front direction, the arrow UP indicates the vehicle body upward direction, and the arrow IN indicates the vehicle width inside direction.

  1 and 2, a rear portion of a vehicle body 10 formed of CFRP (carbon fiber reinforced plastic) is shown in a perspective view or an exploded perspective view. As shown in these drawings, the vehicle body 10 includes a floor panel 16, a rear fender lower portion 18, an upper back lower portion 20, and the like, an underbody 12 that constitutes a lower portion of the vehicle body 10, a center pillar 22, a rear pillar 24, and the like. It is comprised by the upper body 14 which comprises the upper part of the vehicle body 10. As shown in FIG.

  Here, the vehicle body 10 is configured by joining an underbody 12 and an upper body 14 formed separately. The underbody 12 has a structure (a so-called wound structure) in which a CFRP material P (see FIGS. 4 and 5) is filled with a foam core material FC (see FIGS. 4 and 5) such as urethane foam. The body 14 is an SMC molded product molded by SMC molding (Sheet Molding Compound).

  The rear part of the underbody 12 includes a floor panel 16 constituting the floor surface of the passenger compartment 26, a pair of left and right rear fenders (side parts of the underbody) 18 erected on both ends of the floor panel 16 in the vehicle width direction, An upper back lower portion 20 that is erected on the rear end portion of the vehicle body of the floor panel 16 and connects a pair of left and right rear fender lower portions 18 is formed.

  The front end portion of the rear fender lower portion 18 constitutes the rear side edge portion of the side door opening portion 27. Further, the rear end portion of the rear fender lower portion 18 and both end portions in the vehicle width direction of the upper back lower portion 20 are formed continuously, and the upper end portions of the pair of left and right rear fender lower portions 18 and the upper end portion of the upper back lower portion 20 are continuous. It extends substantially horizontally.

  The upper body 14 includes a pair of left and right center pillars 22 coupled to the upper front ends of the pair of left and right rear fender lower portions 18, a rear header 23 coupling the upper ends of the pair of left and right center pillars 22, and the center pillar 22. A pair of left and right rear pillars 24 extending obliquely downward from the upper end of the vehicle body, a pair of left and right rear fenders 28 connecting the lower end of the center pillar 22 and the lower end of the rear pillar 24, and the lower ends of the pair of left and right rear pillars 24. And an upper back upper portion 30 that joins the rear end portions of the pair of left and right rear fender upper portions 28.

  The lower end portion of the rear fender upper portion 28 extends substantially horizontally in the vehicle longitudinal direction when viewed in the vehicle width direction, and is bonded to the upper end portion of the rear fender lower portion 18. Further, the lower end portion of the upper back upper portion 30 extends substantially horizontally in the vehicle width direction when viewed in the longitudinal direction of the vehicle body, and is bonded to the upper end portion of the upper back lower portion 20.

  Further, the inner side portion in the vehicle width direction of the center pillar 22 is constituted by a center pillar inner 32, and the outer side portion in the vehicle width direction of the center pillar 22 is constituted by a center pillar outer 34. Further, the vehicle body lower side portion of the rear header 23 is constituted by a rear header inner 33, and the vehicle body upper side portion of the rear header 23 is constituted by a rear header outer 35.

  The pair of left and right center pillar inners 32 and the rear header inner 33 are integrally formed with the pair of left and right rear pillars 24, the pair of left and right rear fenders 28, and the upper upper part 30. The pair of left and right center pillar outers 34 are integrally formed with the rear header outer 35.

  The lower end side of the center pillar inner 32 is bonded to the outer side in the vehicle width direction of the rear fender lower portion 18 together with the lower end side of the rear fender upper portion 28, and the lower end side of the center pillar outer 34 is also bonded to the outer side in the vehicle width direction of the rear fender lower portion 18. .

  Hereinafter, an adhesion structure between the center pillar 22 and the underbody 12 will be described.

  As shown in FIGS. 3 to 5A and 5B, the lower end portion of the center pillar inner 32 and the lower end portion of the rear fender upper portion 28 are bonded to the outer side in the vehicle width direction of the upper end portion of the rear fender lower portion 18. The bonding portion 40 is formed with a substantially equal width. The adherend portion 40 is formed on the front side of the vehicle body, and is formed on the rear side of the vehicle body with respect to the adherend portion 42 and the adherend portion 42 as the inner side adherend portion to which the lower end portion of the center pillar inner 32 is adhered. It is comprised by the to-be-adhered part 44 to which the lower end part of the upper part 28 is adhere | attached.

  The adherend portion 44 is recessed to the inner side in the vehicle width direction by the thickness of the lower end portion of the rear fender upper portion 28 with respect to the design surface 18A of the rear fender lower portion 18, and the design surface of the rear fender upper portion 28 adhered to the adherend portion 44. 28A and the design surface 18A are configured to be substantially flush with each other. Further, the bonded portion 28B and the bonded portion 44 set on the inner side in the vehicle width direction of the lower end portion of the rear fender upper portion 28 are substantially equal in width, and the lower end portion of the design surface 28A and the upper end portion of the design surface 18A. The gap is not formed between them.

  The center pillar inner 32 is formed in a stepped shape in the vehicle longitudinal direction (width direction). A design surface 32 </ b> A that is flush with the design surface 28 </ b> A of the rear fender upper portion 28 is formed at the rear end portion of the center pillar inner 32. Further, from the design surface 32A of the center pillar inner 32 to the central portion in the width direction, a step portion 32B that is recessed inward in the vehicle width direction with respect to the design surface 32A is formed, and the front end side of the center pillar inner 32 is a step portion 32B. On the other hand, the step 32C is recessed inward in the vehicle width direction.

  Further, the adherend portion 42 is formed in a step shape in the longitudinal direction of the vehicle body. The rear end side of the adherend portion 42 is a step portion 42 </ b> A that is recessed inward in the vehicle width direction with respect to the adherend portion 44. Further, a step 42B that is recessed inward in the vehicle width direction with respect to the step 42A is formed from the step 42A to the front end of the adherend portion 42.

  Here, the bonding portion 32D set on the inner side in the vehicle width direction of the lower end portion of the center pillar inner 32 and the bonded portion 42 are in a sexable relationship, and are bonded without a gap. .

  Further, on the outer side of the rear fender lower portion 18 in the vehicle width direction, a bonded portion 46 is formed as an outer side bonded portion to which the lower end portion of the center pillar outer 34 is bonded. The adherend portion 46 and the adherend portion 42 are formed in a step shape in the vertical direction of the vehicle body, and the adherend portion 42 is a stepped portion recessed inward in the vehicle width direction with respect to the adherend portion 46. Yes.

  The center pillar outer 34 includes a design surface 34A that is substantially flat along the longitudinal direction of the vehicle body. The front end portion of the center pillar outer 34 is a step 34B that is recessed inward in the vehicle width direction with respect to the design surface 34A. ing.

  Further, the adherend 46 includes a step 46A that is recessed inward in the vehicle width direction with respect to the design surface 18A, and the front end of the adherend 46 is recessed inward in the vehicle width direction with respect to the step 46A. A step 46B is provided.

  Here, the bonded portion 34C and the bonded portion 46 set on the inner side in the vehicle width direction of the lower end portion of the center pillar outer 34 are in a sexable relationship. Further, the step between the step 42A and the step 46A and the step between the step 42B and the step 46B are about the thickness of the center pillar inner 32, and the step 32B, the step 46A, and the step The part 32C and the step part 46B are substantially flush.

  As a result, the bonded portion 34C and the bonded portion 46 are bonded together without a gap. Further, the step portion 32C and the step portion 34B are combined with no gap. Further, the bonding portion 34C and the bonded portion 46 have substantially the same width in the longitudinal direction of the vehicle body, and no gap is formed between the design surface 34A and the design surface 18A. In addition, the adhesive portion 34C and the adhesive portion 32D have substantially the same width in the longitudinal direction of the vehicle body, and no gap is formed between the design surface 34C and the design surface 32A.

  Further, the step between the step 46A and the design surface 18A is set to be approximately the thickness of the center pillar outer 34, and the design surface 34A and the design surface 18A are substantially flush with each other.

  The front end portion of the rear fender lower portion 18 is a step portion 18B that is recessed inward in the vehicle width direction with respect to the design surface 18A. The step portion 18B and the step portion 34B have substantially equal widths, and the step between the step portion 18B and the design surface 18A and the step between the step portion 34B and the design surface 34A are substantially the same. 34B and the stepped portion 18B are continuously connected in the vertical direction of the vehicle body without any step.

  Next, the operation in this embodiment will be described.

  The lower end side of the center pillar outer 34 extends from the lower end portion of the center pillar inner 32 to the lower side of the vehicle body. Further, on the outer side in the vehicle width direction at the upper front end of the pair of left and right rear fender lower portions 18, A bonded portion 46 that is offset from the bonding portion 42 to the vehicle body lower side and the vehicle width direction outer side is formed. As a result, the adhesive portion 32D set on the inner side in the vehicle width direction of the lower end portion of the center pillar inner 32 is bonded to the bonded portion 42, and the adhesive portion 34C set on the inner side in the vehicle width direction of the lower end portion of the center pillar outer. It is possible to adhere to the adherend 46.

  That is, it is possible to bond both the center pillar inner 32 and the center pillar outer 34 to the rear fender lower portion 18, thereby ensuring a bonding area between the center pillar 22 and the rear fender lower portion 18. It is possible to ensure adhesion strength with the rear fender lower portion 18.

  In addition, since the adherend portion 42 and the center pillar inner 32 are formed stepwise in the longitudinal direction of the vehicle body, the area of the adherend portion 32D and the adherend portion 42 is smaller than when they are formed flat. As a result, the bonding area between the center pillar inner 32 and the rear fender lower portion 18 is increased. Therefore, the adhesive strength between the center pillar inner 32 and the rear fender lower portion 18 is improved.

  In addition, since the adherend portion 46 and the center pillar outer 34 are formed stepwise in the longitudinal direction of the vehicle body, the areas of the adherend portion 34C and the adherend portion 46 are smaller than when they are formed flat. The adhesion area between the center pillar outer 34 and the rear fender lower portion 18 is enlarged. Therefore, the adhesive strength between the center pillar outer 34 and the rear fender lower portion 18 is improved.

  Further, the step 46 between the design surface 34A of the center pillar outer 34 and the design surface 18A of the rear fender lower portion 18 is reduced by making the adherend portion 46 a stepped portion recessed inward in the vehicle width direction from the design surface 18A of the rear fender lower portion 18. And design properties can be improved. Furthermore, in the present embodiment, the level difference between the adherend portion 46 and the design surface 18A is set to the thickness of the center pillar outer 34, so that the design surface 34A of the center pillar outer 34 and the design surface 18A of the rear fender lower portion 18 are formed. Since it can comprise substantially flush, the design property can be further improved.

  Incidentally, as shown in FIG. 6, as a structure in which the center pillar 22 formed separately from the rear fender lower portion 18 is bonded to the rear fender lower portion 18, an adherend portion 50 is formed on the inner side in the vehicle width direction of the upper end portion of the rear fender lower portion 18. And the structure which adhere | attaches the vehicle width direction outer side of the lower end part of the center pillar 22 to the to-be-adhered part 50 is mentioned.

  In this structure, since the center pillar inner 32 cannot be bonded to the rear fender lower portion 18, the bonding area between the center pillar 22 and the rear fender lower portion 18 is smaller than that of the present embodiment, and the center pillar 22 and the rear fender lower portion 18 The adhesive strength of the is reduced.

  Here, the center pillar 22 is inclined outward in the vehicle width direction toward the lower side of the vehicle body (configured to have a depression angle), and the bonded portion 50 to which the outer side of the center pillar 22 in the vehicle width direction is bonded extends toward the upper side of the vehicle body. When tilted inward in the vehicle width direction (configured at an elevation angle), the lower end outer portion of the center pillar 22 is disposed more outward in the vehicle width direction than the upper end inner portion of the bonded portion 50.

  In such a configuration, when the center pillar 22 is integrally formed with the rear header 23, it is difficult or impossible to set the center pillar 22 to the bonded portion 50. Therefore, after the pair of left and right center pillars 22 are formed separately from the rear header 23 and bonded to the adherend 50, the pair of left and right center pillars 22 and the rear header 23 must be bonded.

  On the other hand, in the present embodiment, the center pillar inner 32 and the center pillar outer 34 are adhered to the adherend portions 42 and 46 formed on the outer side in the vehicle width direction of the rear fender lower portion 18. Even when 22 is configured as a depression, a pair of left and right center pillar inners 32 integrally formed with the rear header inner 33 and a pair of left and right center pillar outers 34 integrally formed with the rear header outer 35 are provided on the rear fender lower portion 18. It is possible to assemble and bond.

  Therefore, as compared with the structure shown in FIG. 6, the rigidity of the center pillar 22 can be improved, and the work of assembling and bonding the center pillar 22 to the rear fender lower portion 18 can be facilitated.

  The present invention has been described in detail with respect to specific embodiments. However, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in this embodiment, the vehicle body 10 having the FPP body structure of the present invention is made of CFRP, but may be made of other FRP such as GFRP (glass fiber reinforced plastic).

  In the present embodiment, the present invention has been described by taking the bonding structure between the center pillar and the underbody as an example. However, the present invention is also applied to the bonding structure between the other pillars such as the front pillar and the rear pillar and the underbody. Is possible.

  Furthermore, in this embodiment, the pair of left and right center pillar inners 32 and the pair of left and right center pillar outers 34 are integrally formed, but they are not essential and may be formed separately.

It is a perspective view which shows the body structure made from FRP which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the body structure made from FRP which concerns on one Embodiment of this invention. It is a disassembled perspective view which expands and shows the principal part of the body structure made from FRP which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view which shows the principal part of the body structure made from FRP which concerns on one Embodiment of this invention. (A) is 5 (A) -5 (A) sectional drawing of FIG. 4, (B) is 5 (B) -5 (B) sectional drawing of FIG. It is a longitudinal cross-sectional view which shows the principal part of the body structure made from FRP which concerns on a comparative example.

Explanation of symbols

12 Underbody 18A Design surface 22 Center pillar (pillar)
32 Center pillar inner (pillar inner)
34 Center Pillar Outer (Pillar Outer)
42 Bonded part (Inner side bonded part)
46 Bonded part (Outer side bonded part)

Claims (6)

A pair of left and right pillar inners constituting the inner side in the vehicle width direction of a pair of left and right FRP pillars extending from the left and right side portions of the FRP underbody to the vehicle body;
A pair of left and right pillar outers constituting the vehicle width direction outer side of the pair of left and right pillars, the lower end side extending from the lower end part of the pillar inner to the vehicle body lower side,
A pair of left and right inner side bonded portions formed on the vehicle width direction outer sides of the left and right side portions of the underbody, to which the lower end side of the pillar inner is bonded;
A pair of left and right outer members formed on the outer sides in the vehicle width direction on both the left and right sides of the underbody and offset from the lower side of the vehicle body and the outer side in the vehicle width direction with respect to the inner side bonded portion, and bonded to the lower end side of the pillar outer Side adherend,
An FRP body structure characterized by comprising:   The FRP body structure according to claim 1, wherein the pair of left and right pillar inners are integrally formed.   The FRP body structure according to claim 1 or 2, wherein the pair of left and right pillar outers are integrally formed.   The bonded portion of the pillar inner with the inner-side bonded portion, and the inner-side bonded portion are formed in a stepped shape in the vehicle body front-rear direction. The FRP body structure described.   The bonded portion of the pillar outer with the outer-side bonded portion and the outer-side bonded portion are formed stepwise in the vehicle body front-rear direction. The FRP body structure described.   The FPR body structure according to any one of claims 1 to 5, wherein the outer side bonded portion is a stepped portion recessed inward in the vehicle width direction from a design surface of the underbody.

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