JP6814688B2 - Body structural members - Google Patents

Description

The present invention relates to a vehicle body structural member.

Some conventional vehicle body structural members are formed by joining a plurality of members by spot welding. Patent Document 1 discloses a technique related thereto. Further, when a member made of fiber reinforced plastic is adopted as the plurality of members, it is generally practiced to provide an adhesive surface on each member and join the adhesive surfaces with an adhesive.

Patent No. 3498614

By the way, the adhesive strength of the joint portion by the adhesive has a characteristic (anisotropy of strength) that the strength changes greatly depending on the direction of the load input to the joint portion. That is, when a load in the shearing direction is input to the joint and shear stress is uniformly applied to the bonded surface, the joint exhibits a sufficiently high strength (shear strength). However, when a load in the peeling direction is input to the joint and a biased tensile stress is applied to one end side of the bonded surface, the joint has a significantly lower strength (peeling) than the shear strength. Strength) is shown.

In a vehicle body structural member formed by joining a plurality of members with an adhesive, when a load is input from the outside to one of the plurality of members, the low peel strength of the joint is described above. It was a factor that reduced the strength of the vehicle body structural members against the load.

An object of the present invention is to improve the strength of a joint portion in a vehicle body structural member.

In the vehicle body structural member according to one aspect of the present invention, one of the two members joined to each other by an adhesive has an adhesive surface in contact with the adhesive and a load indicated by a predetermined load vector from the outside. It has a load input point to be input. At least a part of the bonded surface has an outward normal vector having an internal angle of 90 ° or less with the load vector.

According to the present invention, the strength of the joint portion in the vehicle body structural member can be improved.

It is a vehicle width direction inside side view of the center pillar which concerns on embodiment of this invention. It is sectional drawing along the X-ray line of FIG. 1 of the center pillar which concerns on 1st Embodiment of this invention. It is an enlarged view of the IIB part of FIG. 2A. It is an enlarged view of the IIC part of FIG. 2A. It is sectional drawing along the X-ray line of FIG. 1 of the center pillar which concerns on 2nd Embodiment of this invention. It is an enlarged view of the part IIIB of FIG. 3A. It is an enlarged view of the part IIIC of FIG. 3A. It is a figure which shows the main part of the cross section along the X-ray line of FIG. 1 of the center pillar which concerns on 3rd Embodiment of this invention. It is an enlarged view of the IVB part of FIG. 4A. It is a figure which shows the main part of the cross section along the X-ray line of FIG. 1 of the center pillar which concerns on 4th Embodiment of this invention. It is an enlarged view of the VB part of FIG. 5A. It is sectional drawing which follows the X-ray line of FIG. 1 of the center pillar which concerns on 5th Embodiment of this invention. It is an enlarged view of the VIB part of FIG. 6A. It is a figure which shows the main part of the cross section along the X-ray line of FIG. 1 of the center pillar which concerns on 6th Embodiment of this invention. It is an enlarged view of the VIIB part of FIG. 7A.

<First Embodiment>
Hereinafter, the center pillar 1 (body structure member) according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 2C.

As shown in FIG. 1, the center pillar 1 extends in the vehicle vertical direction at the central portion of the body side panel 2 in the vehicle front-rear direction.

As shown in FIG. 2A, the center pillar 1 has a hollow closed cross-sectional structure, and includes a pillar inner 3 (first member) and a pillar outer 4 (second member).

The pillar inner 3 is made of a composite material such as fiber reinforced plastic, extends in the vehicle vertical direction inside the pillar outer 4 in the vehicle width direction, and constitutes an inner portion of the center pillar 1 in the vehicle width direction. The pillar inner 3 has a hat-shaped cross section over substantially the entire length thereof, and in the cross section, the vertical wall portion 31 extending in the front-rear direction of the vehicle and the outer side in the vehicle width direction from the front end edge of the vertical wall portion 31. A front wall portion 32 extending inward and a front flange 33 extending forward from the outer edge of the front wall portion 32 are provided. Further, the pillar inner 3 has a rear wall portion 34 extending outward in the vehicle width direction from the rear end edge of the vertical wall portion 31 and a rear flange 35 extending rearward from the outer end edge of the rear wall portion 34 in the cross section. Be prepared.

The pillar outer 4 is made of a composite material such as fiber reinforced plastic, extends in the vehicle vertical direction outside the pillar inner 3 in the vehicle width direction, and constitutes an outer portion in the vehicle width direction of the center pillar 1. The pillar outer 4 has a hat-shaped cross section over substantially the entire length thereof, and in the cross section, the vertical wall portion 41 extending in the front-rear direction of the vehicle and the inside in the vehicle width direction from the front end edge of the vertical wall portion 41. A front wall portion 42 extending inward and a front flange 43 extending forward from the inner edge of the front wall portion 42 are provided. Further, in the cross section, the pillar outer 4 has a rear wall portion 44 extending inward in the vehicle width direction from the rear end edge of the vertical wall portion 41 and a rear flange 45 extending rearward from the inner end edge of the rear wall portion 44. Be prepared.

As shown in FIGS. 2B and 2C, the front flange 33 of the pillar inner 3 and the front flange 43 of the pillar outer 4 are bonded by the adhesive AG, and the rear flange 35 of the pillar inner 3 and the rear flange 45 of the pillar outer 4 are bonded to each other. And are bonded by the adhesive AG. The adhesive AG is not particularly limited, and for example, known adhesives such as epoxy-based and urethane-based adhesives can be used.

As shown in FIG. 2B, the outer side surface 33a of the front flange 33 in the vehicle width direction and the inner side surface 43a of the front flange 43 in the vehicle width direction are arranged so as to face each other with an adhesive layer made of an adhesive AG interposed therebetween. The range of the outer surface 33a in the vehicle width direction that is in direct contact with the adhesive AG constitutes the front side adhesive contact surface S of the pillar inner 3, and the area of the inner surface 43a in the vehicle width direction that is in direct contact with the adhesive AG. The range constitutes the front adhesive contact surface S of the pillar outer 4.

Further, as shown in FIG. 2C, the outer side surface 35a of the rear flange 35 in the vehicle width direction and the inner side surface 45a of the rear flange 45 in the vehicle width direction are arranged so as to face each other with the adhesive layer made of the adhesive AG interposed therebetween. There is. The range of the outer surface 35a in the vehicle width direction that is in direct contact with the adhesive AG constitutes the adhesive contact surface S on the rear side of the pillar inner 3, and is in direct contact with the adhesive AG on the inner surface 45a in the vehicle width direction. The range constitutes the adhesive contact surface S on the rear side of the pillar outer 4.

In other words, each adhesive contact surface S constitutes an interface between the front flanges 33, 43 or the rear flanges 35, 45, which are adherends, and the adhesive AG. Hereinafter, the adhesive contact surface S is simply referred to as "adhesive surface S".

As shown in FIG. 2B, the adhesive surface S on the front side of the pillar inner 3 is provided with an uneven shape over the entire area. There are two types of uneven shapes, in which the first inclined surface 51, the second inclined surface 52, the first inclined surface 51, the second inclined surface 52, ... Are arranged in this order from the rear end to the front end of the adhesive surface S. It is composed of a flat inclined surface. The first inclined surface 51 and the second inclined surface 52 are inclined at different angles with respect to the surface direction of the outer surface 33a in the vehicle width direction of the front flange 33. The first inclined surface 51 is inclined so as to be located inside in the vehicle width direction toward the front side, and the second inclined surface 52 is inclined so as to be located outside in the vehicle width direction toward the front side. The second inclined surface 52 and the first inclined surface 51 located adjacent to the front side thereof intersect with each other to form a mountain portion as a convex portion R, and are located adjacent to the first inclined surface 51 and the front side thereof. The second inclined surface 52 intersects with each other to form a valley portion as a recess V.

Further, the adhesive surface S on the front side of the pillar outer 4 is also provided with an uneven shape over the entire area. The uneven shape is composed of a third inclined surface 53 substantially parallel to the first inclined surface 51 and a fourth inclined surface 54 substantially parallel to the second inclined surface 52. The third inclined surface 53 and the fourth inclined surface 54 are the third inclined surface 53, the fourth inclined surface 54, the third inclined surface 53, and the fourth inclined surface 54 from the rear end to the front end of the adhesive surface S. , ... are arranged in this order. The third inclined surface 53 and the fourth inclined surface 54 located adjacent to the front side thereof intersect to form a mountain portion as a convex portion R, and are located adjacent to the fourth inclined surface 54 and the front side thereof. It intersects with the third inclined surface 53 to form a valley portion as a recess V.

As shown in FIG. 2C, the adhesive surface S on the rear side of the pillar inner 3 and the pillar outer 4 is also provided with an uneven shape like the adhesive surface S on the front side.

The uneven shape on the rear side of the pillar inner 3 is such that the fifth inclined surface 55, the sixth inclined surface 56, the fifth inclined surface 55, the sixth inclined surface 56, and so on, from the front end to the rear end of the adhesive surface S. It is composed of two types of flat inclined surfaces arranged in the order of. The fifth inclined surface 55 and the sixth inclined surface 56 are inclined at different angles with respect to the surface direction of the outer surface 35a in the vehicle width direction of the rear flange 35. The fifth inclined surface 55 is inclined so as to be located inside in the vehicle width direction toward the front side, and the sixth inclined surface 56 is inclined so as to be located outside in the vehicle width direction toward the front side. The fifth inclined surface 55 and the sixth inclined surface 56 located adjacent to the rear side intersect with each other to form a mountain portion as a convex portion R, and are located adjacent to the sixth inclined surface 56 and the rear side. It intersects with the fifth inclined surface 55 to form a valley portion as a recess V.

The uneven shape on the rear side of the pillar outer 4 is composed of a seventh inclined surface 57 substantially parallel to the fifth inclined surface 55 and an eighth inclined surface 58 substantially parallel to the sixth inclined surface 56. Has been done. The seventh inclined surface 57 and the eighth inclined surface 58 are the seventh inclined surface 57, the eighth inclined surface 58, the seventh inclined surface 57, and the eighth inclined surface 58 from the front end to the rear end of the adhesive surface S. , ... are arranged in this order. The 8th inclined surface 58 and the 7th inclined surface 57 located adjacent to the rear side intersect to form a mountain portion as a convex portion R, and are located adjacent to the 7th inclined surface 57 and the rear side. The eighth inclined surface 58 intersects with each other to form a valley portion as a recess V.

The plurality of convex portions R provided on the front and rear adhesive surfaces S of the pillar inner 3 mesh with the plurality of concave portions V provided on the front and rear adhesive surfaces S of the pillar outer 4, respectively. .. The uneven shape can be formed by a known method such as an RTM method or a press molding method using a mold having an inverted shape of the uneven shape on the molding surface, for example.

As shown in FIG. 1, a shoulder belt anchor 60 is provided on the upper portion of the center pillar 1. The shoulder belt anchor 60 includes a belt guide 61 and an anchor bracket 62 that supports the belt guide 61 so as to be adjustable in position. As shown in FIG. 2A, the anchor bracket 62 is fixed to the anchor fixing point P of the vertical wall portion 31 of the pillar inner 3 via fasteners such as bolts 63 and nuts 64. The seat belt 65 extends from a pretensioner provided at the lower part of the center pillar 1 and is inserted into a guide hole 61a of the belt guide 61. A removable tongue (not shown) is fixed to a buckle (not shown) provided on the seat cushion side at the tip of the inserted seat belt 65. When the tongue is locked to the buckle, the seatbelt 65 extends diagonally from the shoulder to the waist of the occupant and restrains the occupant's upper body.

When an inertial force in front of the vehicle acts on the occupant due to a frontal collision, the inertial force is transmitted to the anchor fixing point P (load input point) of the pillar inner 3 via the seat belt 65, the belt guide 61 and the anchor bracket 62. Will be done. At this time, the load input to the anchor fixing point P is the tension of the downward extending portion 65a extending downward from the guide hole 61a of the belt guide 61 of the seatbelt 65 and the shoulder portion of the occupant from the guide hole 61a. Corresponds to the resultant force with the tension of the anterior extending portion 65b extending toward. Therefore, the load can be shown as a vector from the anchor fixing point P toward the front of the vehicle and inward in the vehicle width direction.

The position of the belt guide 61 is limited to the range in which the position of the belt guide 61 can be adjusted in the vertical direction on the anchor bracket 62, and the height of the shoulder of the occupant is also limited to a certain range in design. Therefore, the front of the seat belt 65 The height position and angle of the extending portion 65b are limited to a certain range. Therefore, the direction of the load vector can also be limited to a certain range. Here, from among the load vectors that can be generated, the load vector F that has the strictest load condition (direction) for the adhesive surface S is selected.

As shown in FIG. 2A, the selected load vector F has a component in the direction of pulling the pillar inner 3 away from the pillar outer 4. Specifically, in the first plane which is stretched by the straight line passing through the point A and the anchor fixing point P on the first inclined surface 51 and the load vector F and crosses the pillar inner 3 and the pillar outer 4. , Has a component in the direction of pulling the pillar inner 3 away from the pillar outer 4. The direction in which the pillar inner 3 is separated from the pillar outer 4 is the direction indicated by the white arrow in FIG. 2A, and the direction of the pillar inner 3 with respect to the pillar outer 4 when the pillar inner 3 is brought close to the pillar outer 4 to be adhered to the pillar outer 4. The direction is opposite to the moving direction. In the present embodiment, for example, in the direction in which the pillar inner 3 is separated from the pillar outer 4 in the vehicle width direction, or in the cross section of the center pillar 1 according to the first plane, the pillar inner 3 is formed from the center 46 of the pillar outer 4. It can be defined as the direction toward the center 36 of.

Further, the load vector F is a second plane that is stretched by the straight line passing through the point B on the fifth inclined surface 55 and the anchor fixing point P and the load vector F and crosses the pillar inner 3 and the pillar outer 4. Also inside, it has a component in the direction of pulling the pillar inner 3 away from the pillar outer 4.

When the load indicated by the load vector F is input to the anchor fixing point P, a part thereof is passed through the vertical wall portion 31, the front wall portion 32, and the front flange 33 of the pillar inner 3, as shown in FIG. 2B. In addition, a force f _A substantially parallel to the load vector F is transmitted to the adhesive surface S of the front flange 33. Further, another part of the above load is applied to the adhesive surface S of the rear flange 35 via the vertical wall portion 31, the rear wall portion 34 and the rear flange 35 of the pillar inner 3, as shown in FIG. 2C. It is transmitted as a force f _B that is substantially parallel to the vector F. In FIG. 2A, the angle θ _f formed by the load vector F with respect to the straight line passing through the point A on the first inclined surface 51 and the anchor fixing point P is such that the force f _A is the straight line with respect to the straight line in FIG. 2B. It is equal to the angle θ _f . Further, in FIG. 2A, the angle θ _r formed by the load vector F with respect to the straight line passing through the point B on the fifth inclined surface 55 and the anchor fixing point P has a force f _B with respect to the straight line in FIG. 2C. Equal to the angle θ _r .

In the present embodiment, each of the first inclined surface 51, as shown in Figure 2B, the interior angle of the force f _A theta _A, i.e. the outward normal vector N _A where the interior angle between the load vector F is less than 90 ° have. Further, each have a fifth inclined surface 55, as shown in Figure 2C, the inner angle theta _B of the force f _B, i.e. the outward normal vector N _B where the interior angle between the load vector F is less than 90 ° ing.

Hereinafter, the action and effect of this embodiment will be described.

In the present embodiment, the first inclined surface 51 is provided on the adhesive surface S of the front flange 33, and the fifth inclined surface 55 is provided on the adhesive surface S of the rear flange 35. Since the interior angle between the outward normal vector N _A and the load vector F of the first inclined surface 51 is set to 90 ° or less, normal component of the first inclined surface 51 of the force f _A is negative (inward )do not become. Further, since the interior angle is also set to 90 ° or less with the outward normal vector N _B and the load vector F of the fifth inclined surface 55, the normal direction of the component of the fifth inclined surface 55 of the force f _B also negative It does not become (inward). Therefore, according to the present embodiment, the force in the peeling direction is less likely to act on the adhesive AG on the first inclined surface 51 and the adhesive AG on the fifth inclined surface 55, so that the adhesive at the joint portion. It is possible to prevent the destruction of the AG and improve the strength of the joint.

Further, as described above, the load vector F has a component in the direction in which the pillar inner 3 is separated from the pillar outer 4, and each adhesive surface S has a component in the direction in which the load vector F brings the two closer to each other. It is under load conditions where a force in the peeling direction is more likely to be generated than when it is. Even in such a case, by providing the first inclined surface 51 or the fifth inclined surface 55 on the adhesive surface S, it is possible to prevent the generation of a force in the peeling direction on the adhesive surface S with a simple structure.

Further, a plurality of convex portions R are formed on the adhesive surface S of the pillar inner 3, and these plurality of convex portions R mesh with each of the plurality of concave portions V formed on the adhesive surface S of the pillar outer 4. There is. A first inclined surface 51 or a fifth inclined surface 55 is provided on the surface of each of the plurality of convex portions R. Therefore, even if the adhesive AG is destroyed on the surface of a part of the convex portion R, the adhesive is provided on the first inclined surface 51 or the fifth inclined surface 55 provided on the surface of the other convex portion R. The progress of the destruction of AG can be stopped.

The concave-convex shape pattern is not limited to the above-mentioned one, and for example, a part or all of each inclined surface may be composed of a curved surface. Further, although each of the adhesive surfaces S is provided with two types of inclined surfaces, one adhesive surface S may include three or more types of inclined surfaces. Further, a non-inclined surface or a gap may be provided between the inclined surfaces of one adhesive surface S.

<Other embodiments>
Next, the center pillar 1 according to the second to sixth embodiments will be described with reference to FIGS. 3A to 7B. Elements having the same functions as the elements already described above are designated by the same reference numerals, and the description thereof will be omitted.

Further, as will be described later, the adhesive surface S according to the second to sixth embodiments is also a surface inclined so that the internal angle between the outward normal vectors N _A , N _B and the load vector F is 90 ° or less. Is provided. Therefore, also in these embodiments, the effect of improving the strength of the joint can be obtained as in the first embodiment.

In the second embodiment, as shown in FIGS. 3A and 3B, among the adhesive surfaces S on the front side of the pillar inner 3, the point where the distance on the surface of the pillar inner 3 to the anchor fixing point P is the minimum (recent contact point). A1) is located on the first inclined surface 51. On the adhesive surface S on the front side of the pillar outer 4, a point A2 that faces the contact A1 with the adhesive layer sandwiched between them is located on the third inclined surface 53. Further, as shown in FIGS. 3A and 3C, also on the adhesive surface S on the rear side of the pillar inner 3, the distance on the surface of the pillar inner 3 to the anchor fixing point P is the minimum among the adhesive surfaces S. The point (recent contact B1) is located on the fifth inclined surface 55. On the adhesive surface S on the rear side of the pillar outer 4, a point B2 that recently faces the contact B1 with the adhesive layer sandwiched between them is located on the seventh inclined surface 57.

When the load indicated by the load vector F is input to the anchor fixing point P, the input load passes through the wall portions 31, 32, 34 of the pillar inner 3 and the flanges 33, 35, and each adhesive surface S. Of each adhesive surface S, it is first recently transmitted to the contacts A1 and B1. Therefore, the contacts A1 and B1 are likely to be the starting points of the destruction of the adhesive AG recently. In the present embodiment, the contacts A1 and B1 are located on the first inclined surface 51 and the fifth inclined surface 55, and the force in the peeling direction is less likely to act on the adhesive AG on the contacts A1 and B1 recently. Therefore, it is possible to efficiently prevent the occurrence of breakage of the adhesive AG at the joint portion.

In the third embodiment, as shown in FIGS. 4A and 4B, the front wall portion 32 of the pillar inner 3 is abutted and joined to the pillar outer 4. Specifically, the outer end portion 32A of the front wall portion 32 in the vehicle width direction is abutted against the front flange 43 of the pillar outer 4, and is adhered by the adhesive AG. The end face 32a of the end portion 32A is the interior angle between the outward normal vector N _A and the load vector F is inclined so that the 90 ° or less, and constitutes the adhesive surface S.

In the present embodiment, since the front wall portion 32 extending in the vehicle width direction is abutted against the pillar outer 4, the width of the joint portion in the vehicle front-rear direction can be reduced, and the strength of the joint portion is improved in a space-efficient manner. be able to. The structure of the abutting joint may be provided on the front wall portion 42 side of the pillar outer 4, or may be provided on the rear wall portion 34 of the pillar inner 3 or the rear wall portion 44 of the pillar outer 4.

In the fourth embodiment, the front flange 33 of the pillar inner 3 and the front flange 43 of the pillar outer 4 are bent in the cross section as shown in FIGS. 5A and 5B. The bent front flange 33 is composed of a first range 33A closer to the anchor fixing point P in the cross section and a second range 33B located in front of the first range 33A. The outer surfaces 33a in the vehicle width direction of the first and second ranges 33A and 33B form the adhesive surface S. The second range 33B extends substantially parallel to the vertical wall portion 31. First range. 33A, the interior angle between the outward normal vector N _A and the load vector F is inclined so that the 90 ° or less. Further, the front flange 43 of the pillar outer 4 also has a third range 43A extending substantially parallel to the first range 33A of the front flange 33 of the pillar inner 3 and substantially parallel to the second range 33B of the front flange 33. A fourth range 43B that extends is provided. The inner side surfaces 43a in the vehicle width direction of the third and fourth ranges 43A and 43B form the adhesive surface S.

In the present embodiment, since the front flange 33 of the pillar inner 3 and the front flange 43 of the pillar outer 4 are bent to form the adhesive surface S, the adhesive surface S can be widened. The structure in which the flange is bent may be provided on the rear flanges 35 and 45 sides.

In the fifth embodiment, as shown in FIG. 6A, the pillar inner 3 and the pillar outer 4 have a U-shaped cross section that opens inward in the vehicle width direction. The pillar inner 3 has a vertical wall portion 31 extending in the front-rear direction of the vehicle, a front wall portion 37 extending inward in the vehicle width direction from the front end edge of the vertical wall portion 31, and a rear side of the vertical wall portion 31 in the cross section. It is provided with a rear wall portion 38 extending inward in the vehicle width direction from the edge. The pillar outer 4 has a vertical wall portion 41 extending in the front-rear direction of the vehicle, a front wall portion 47 extending inward in the vehicle width direction from the front end edge of the vertical wall portion 41, and a rear side of the vertical wall portion 41 in the cross section. It is provided with a rear wall portion 48 extending inward in the vehicle width direction from the edge. The inner ends of the front wall portions 37 and 47 in the vehicle width direction and the inner ends of the rear wall portions 38 and 48 in the vehicle width direction are adhered to each other by the adhesive AG.

Adhesive surface S in the wall portion 38 after the pillar inner 3, as shown in FIG. 6B, and a first flat surface S _A and the second flat surface S _B. The first flat surface S _A, the interior angle between the outward normal vector N _B and the load vector F is inclined so that the 90 ° or less. Second flat surface S _B is disposed adjacent to the first flat surface S _A, intersects therewith. In a cross section perpendicular to the first and the flat surface S _A and the second flat surface S _B, both flat surfaces S _A, between the S _B, acute corner portion C is formed.

When the direction of the force transmitted from the anchor fixing point P to the rear wall portion 38 changes significantly within the cross section of the center pillar 1, the force is indicated by a vector starting from the apex C1 of the corner portion C. , the direction of the vector, when in an angular range of inner angle theta _T forming a first flat surface S _a and the second flat surface S _B is, first and second flat surfaces S _a, at the same time both S _B A force in the peeling direction acts. In the present embodiment, since the corner portion C is acute, the first and second flat surfaces S _A, the incidence of conditions which act at the same time the peeling direction force both the S _B, the corner portion C is obtuse It can be less than the case.

In the sixth embodiment, as shown in FIGS. 7A and 7B, the adhesive surface S provided on the outer surface 35a of the rear flange 35 of the pillar inner 3 in the vehicle width direction is the longitudinal direction of the rear flange 35 (in FIG. 7A). It extends in a strip shape along a direction substantially perpendicular to the paper surface; the first direction). Adhesive surface S constitutes a flat inclined plane S _C, internal angle with its outward normal vector N _B and the load vector F has a least 80 ° to 90 °. In addition, as a point B on the inclined plane S _C, and, when projected load vector F on the third plane orthogonal to the longitudinal direction of the rear flange 35, inclined plane S _C is on the third plane, the projection It is located on the extension line of the applied load vector F.

The force f _B transmitted to the adhesive surface S of the rear flange 35 of the pillar inner 3 is usually substantially parallel to the load vector F. However, depending on the cross-sectional shape and rigidity distribution of the center pillar 1, the moment generated by the distance (arm length) between the line of action of the load vector F and the bonding surface S has a large effect on the direction of the force f _B. I have something to do. In the present embodiment, since the inclined plane S _C on the extension of the load vector F on the third plane is located, it is possible to suppress the influence of the moment is given to the direction of the force f _B, inclined plane S _C It is possible to more reliably prevent the force in the peeling direction from acting on the upper adhesive AG.

Further, in the present embodiment, the inclined plane S _C is composed of a flat surface, and the interior angle between the outward normal vector N _B and the load vector F is set at least 80 ° to 90 °. According to this configuration, the inclination is transmitted to the plane S _C force, since to act as a shear stress uniformly distributed throughout the inclined plane S _C, is possible to efficiently increase the strength of the joint it can.

Although the embodiments of the present invention have been described above, these embodiments are merely examples described for facilitating the understanding of the present invention, and the present invention is not limited to the embodiments. The technical scope of the present invention is not limited to the specific technical matters disclosed in the above-described embodiment, but also includes various modifications, modifications, and alternative technologies that can be easily derived from the specific technical matters.

For example, in a vehicle body structural member provided with a plurality of adhesive surfaces S, one of the above embodiments may be adopted for one adhesive surface S, and another embodiment may be adopted for another adhesive surface S. .. Further, any two or more of the above embodiments may be applied in combination to one adhesive surface S.

Further, in the above embodiment, the pillar inner 3 and the pillar outer 4 are made of fiber reinforced plastic, but the materials of the pillar inner 3 and the pillar outer 4 are not particularly limited, and one or both of them may be made of metal. Good.

Further, in the above embodiment, an example in which the present invention is applied to the shoulder belt anchor fixing portion of the center pillar 1 is shown, but the present invention is also applied to the shoulder belt anchor fixing portion of the rear pillar, the door hinge mounting portion of the front pillar, and the like. can do.

1 Center pillar (body structural member)
3 Pillar inner (first member)
4 Pillar outer (second member)
AG Adhesive S Adhesive Surface S _A First Flat Surface (Region)
S _B second flat surface S _C inclined plane (region)
51 First inclined surface (area)
55 Fifth inclined surface (area)
F Load vector P Anchor fixed point (load input point)
N _A, N _B outward normal vector A1 nearest neighbor (that distance on the surface of the first member to the load input point is minimum)
R Convex V Concave C Corner

Claims (8)

A vehicle body structural member in which the first and second members are joined to each other by an adhesive and a load indicated by a predetermined load vector is input from the outside.
The first member is
The adhesive surface in contact with the adhesive and
The load input point where the load is input and
Is equipped with
A vehicle body structural member characterized in that at least a part of a region of the adhesive surface has an outward normal vector having an internal angle of 90 ° or less with the load vector. In a plane stretched by the load vector, which is stretched by a straight line passing through a point on the region and the load input point, and crosses the first and second members, the load vector is the second member. The vehicle body structural member according to claim 1, further comprising a component in a direction in which the first member is separated from the first member. The adhesive surface extends in a strip shape along the first direction on the surface of the first member.
When the load vector is projected on a plane that passes through a point on the region and is orthogonal to the first direction, the region is located on an extension of the projected load vector on the plane. The vehicle body structural member according to claim 1, wherein the vehicle body structural member is characterized by the above. Any of claims 1 to 3, wherein the point of the adhesive surface where the distance on the surface of the first member to the load input point is the minimum is located on the region. The vehicle body structural member according to item 1. A plurality of recesses are formed on the surface of the second member so as to sandwich the adhesive and face the adhesive surface.
A plurality of convex portions that mesh with each of the plurality of concave portions are formed on the adhesive surface.
The vehicle body structural member according to any one of claims 1 to 4, wherein the region is provided on the surface of each of the plurality of convex portions. The adhesive surface is composed of a first flat surface forming the region and a second flat surface intersecting the first flat surface.
The first member is characterized by having an acute-angled corner portion between the first flat surface and the second flat surface in a cross section perpendicular to the first flat surface and the second flat surface. The vehicle body structural member according to any one of claims 1 to 4. The adhesive surface is composed of a flat surface.
The vehicle body structural member according to any one of claims 1 to 4, wherein the internal angle is set to 80 ° or more and 90 ° or less. The first member is a pillar inner.
The second member is a pillar outer,
The vehicle body structural member according to any one of claims 1 to 7, wherein the load input point is a point where a shoulder belt anchor is fixed to the pillar inner.

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