JP5652191B2 - Vehicle frame structure - Google Patents

Description

  The present invention relates to a frame structure such as a side sill or a pillar constituting a vehicle body, and belongs to the field of vehicle body structure technology of a vehicle.

  In a vehicle such as an automobile, a metal plate material such as a side sill disposed on the lower edge of the side of the vehicle body and extending in the front-rear direction, or a pillar disposed along the opening on the side of the vehicle body and extending in the vertical direction This type of frame is used to protect the interior of a vehicle in the event of a collision or rollover, or to improve the torsional rigidity of the vehicle body, for example. In order to achieve stability, required strength and rigidity are required.

  In order to meet such a requirement, Patent Documents 1 and 2 disclose a resin frame in which a resin reinforcing body is disposed inside a tubular frame constituting a center pillar or the like. Also, in Patent Document 3, a pair of partition members are disposed along the side surfaces on both sides between an outer surface on which an external force acts and an inner surface opposite to the inner surface of a tubular frame that also constitutes a center pillar or the like. In addition, there is disclosed a reinforcing structure in which the inside of the frame is partitioned into three spaces, and a space between the partition members on both sides and the side surfaces is filled with a foaming agent.

Japanese Patent Laid-Open No. 2002-362412 Japanese translation of PCT publication No. 2004-525813 JP 2005-119588 A

  By the way, it is desirable that the reinforcing member disposed inside the tubular frame as described above is formed to be as light as possible in order to suppress an increase in the weight of the vehicle body. In order to meet the requirements, the vertical plate in the reinforcing body of Patent Document 1 and the reinforcing rib in the reinforcing body of Patent Document 2 are all shaped to cover the entire closed cross section inside the frame, and the weight reduction is not always sufficient. There are some aspects that cannot be said.

  In addition, the reinforcement structure of Patent Document 3 reinforces the corners of the frame where distortion tends to concentrate, and the space between the pair of partition members at the center of the closed cross section is hollow. Although it will be lighter than that which reinforces the area, there is room for further weight reduction in this reinforcement structure, and ensuring sufficient strength and rigidity and weight reduction are compatible with each other There are aspects that cannot be said.

  Therefore, the present invention provides a vehicle frame structure for protecting the interior of a vehicle, for example, in the event of a side collision or rollover, or for improving the torsional rigidity of the vehicle body to achieve good steering stability of the vehicle. It is an object of the present invention to provide a frame structure that is sufficiently reduced in weight while having required strength and rigidity.

  In order to solve the above-described problems, the invention described in each claim of the present application is configured as follows.

  First, the invention according to claim 1 is a vehicle frame structure in which a resin body for reinforcing the frame main body is disposed inside a tubular frame main body, and the frame main body extends outward from the vehicle body. An angle between the first surface portion and the second surface portion located between the first surface portion, the second surface portion facing the first surface portion, and the second surface portion on the vehicle interior facing the first surface portion; And a third surface portion on both sides forming a portion, the cross-sectional shape is formed in a substantially rectangular shape with a hollow cross section, and a pair of the resin bodies are provided near the third surface portions on both sides of the frame body. A first base portion disposed and joined to an inner surface of the corner portion so as to coincide with a corner portion formed between the first surface portion and the third surface portion of the frame body; Matched to the corner formed between the second surface portion and the third surface portion of the main body and joined to the inner surface of the corner portion A second base portion, and an intermediate portion joined to the inner surface of the third surface portion of the frame body by connecting the first and second base portions and integrating them, and the center of the frame body in the resin body A concave portion that is recessed toward the third surface portion side is provided at an intermediate portion of the side portion that faces the portion.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the recess is provided in a curved shape.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the resin body includes a plurality of ribs arranged in the longitudinal direction of the frame body and a connection for connecting these ribs. It is comprised by the part.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the resin body is joined to each joint portion to the frame body by a foam adhesive. And a movement restricting means for preventing the pair of resin bodies from moving toward the center of the frame body when the foamed adhesive is foamed.

  The invention described in claim 5 is characterized in that, in the invention described in claim 4, the movement restricting means is a coupling portion for coupling the pair of resin bodies.

  The invention according to claim 6 is the invention according to claim 4, wherein the movement restricting means is provided on at least one of the first surface portion and the second surface portion of the frame body, and the pair of resin bodies. It is a bead which rushes between and prevents the approach of both resin bodies.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the frame body constitutes a center pillar of the vehicle, and the resin body Has a downward extension disposed at a lower portion of the center pillar, and the extension corresponds to a corner formed between the first surface portion and the third surface portion of the frame body. A base portion joined to the inner surface of the corner portion, and a leg portion extending from the base portion toward the second surface portion along the third surface portion and joined to the third surface portion.

  With the above-described configuration, the invention described in the above claims has the following effects.

  First, according to the first aspect of the present invention, the pair of resin bodies disposed inside the frame main body matches the corner formed between the first surface portion and the third surface portion of the frame main body. And connecting the first and second bases to integrate the first base, the second base matching the corner formed between the second surface and the third surface of the frame body. An intermediate portion and joined to the inner surface of the frame main body, so that when the frame main body constitutes, for example, a pillar or a side sill of the vehicle, a side collision or a rollover is input to them. When the strain concentrates on any corner on the first surface portion side or the second surface portion side of the frame main body due to a load such as a torsion of the vehicle body or the like, these corner portions are the first of the resin body. Reinforced by either or both of the second base It also reliably transmit the load between the first corner of the surface side and the corner portion of the second face side through the intermediate portion, it will be distributed.

  Therefore, the deformation of the cross-sectional shape of the frame main body is suppressed against various loads as described above, the vehicle interior is protected during a side collision or rollover of the vehicle, and the torsional rigidity of the vehicle body is improved. Good steering stability of the vehicle is realized.

  And in particular, according to the present invention, a concave portion that is recessed toward the third surface portion side of the frame main body is provided in an intermediate portion of the side facing the central portion of the frame main body in the resin body. Thus, while ensuring the reinforcing function of the corners of the frame main body and the load transmitting function by the first and second base parts and the intermediate part, excess meat of the part that is not significantly involved in these functions is removed. Thus, the resin body is reduced in weight compared to the case where the portion is not recessed. Thereby, while suppressing the increase in weight and improving the fuel efficiency of the vehicle or improving the energy saving effect, the strength and rigidity against various loads required for the frame are improved, and both are compatible.

  According to the second aspect of the present invention, since the concave portion is provided in a curved shape, the stress concentration in the concave portion is alleviated when the resin body receives the load or transmits the load. As a result, the strength and durability of the resin body are improved as compared with the case where the shape of the recess has corners.

  According to the invention described in claim 3, since the resin body has a structure in which a plurality of ribs arranged in the longitudinal direction of the frame main body are connected by a connecting portion, a reinforcing function of a corner portion of the frame main body or The weight is reduced as compared with the case where the cross-sectional shape having the first and second base portions and the intermediate portion is continuous in the longitudinal direction of the frame body while maintaining the load transmission function.

  By the way, when the resin body is disposed inside the frame body, a method of bonding the resin body to the inner surface of the frame body by foaming a foamed adhesive applied around the resin body is used. However, in this case, when the foaming adhesive is foamed, there is a possibility that the resin bodies respectively arranged near the third surface portions on both sides of the frame main body may move to the center portion of the frame main body so as to approach each other. is there. In this case, since the position of the resin body is shifted from a predetermined position, the reinforcing function and load transmission function required for the resin body are deteriorated.

  On the other hand, according to the invention described in claim 4, since the movement restricting means for preventing the pair of resin bodies from moving toward the central portion of the frame main body when the foaming adhesive is foamed is provided. The resin body is joined to the main body at a predetermined position inside the frame main body, and the necessary reinforcing function and load transmission function of the resin body are realized.

  In that case, according to the invention described in claim 5, the movement restricting means is configured by a coupling portion that couples the pair of resin bodies, and thus, when the foamed adhesive is foamed, these resin bodies are formed. Is prevented from moving toward the center of the frame body.

According to the invention of claim 6, the movement restricting means is a bead that is provided on at least one of the first surface portion and the second surface portion of the frame body and enters between the pair of resin bodies. Thus, similarly to the invention described in claim 5, the pair of resin bodies are prevented from moving toward the center of the frame body when the foamed adhesive is foamed.

  According to the invention described in claim 7 of the present application, the frame structure is applied to the center pillar of the vehicle. In this case, the side pillar is bent so that the center pillar bends inward of the vehicle body when the vehicle collides. The load acts, and the strain concentrates on the corners on the first surface portion side located on the vehicle outer side of the frame main body, but the first base portion side of the resin body is located on the vehicle outer side of the frame main body. The corners of the first surface part side due to the bending load are distributed by transmitting the load from the corner part to the corner part on the second surface part side located inside the vehicle through the intermediate part and dispersing the load. The concentration of distortion in the portion is suppressed, the deformation of the frame main body or the center pillar is suppressed, and the side collision resistance performance of the pillar is improved.

  Further, when the vehicle rolls over, a so-called roof crash load acts on the center pillar, and a bending load acts on the pillar to bend outward of the vehicle body. Although distortion is concentrated on the corner, the second base portion of the resin body reinforces the corner on the second surface portion side located on the vehicle inner side of the frame main body, so that the bending load at the corner Concentration of strain is suppressed, deformation of the frame body or center pillar is suppressed, and the roof crash resistance performance of the pillar is improved.

  Further, when a torsional load is generated on the vehicle body due to road surface irregularities, etc., strain concentrates on the corner of the frame body on the second surface side, and this corner is reinforced by the second base of the resin body. Therefore, the deformation is suppressed, whereby the rigidity of the frame or center pillar with respect to the torsional load, and thus the torsional rigidity of the vehicle body, is improved, and the steering stability of the vehicle is improved.

  Note that the lower part of the center pillar is less likely to receive the roof crash load or the torsional load of the vehicle body. Therefore, only the reinforcement against the bending load due to the above-described side collision is required at the lower part of the pillar. .

  Therefore, in the invention according to claim 7, the base body matches the corner formed between the first surface portion and the third surface portion of the frame body, similar to the first base portion, in the resin body, A leg portion extending from the base portion toward the second surface portion side along the third surface portion is provided, and an extension portion not having a portion corresponding to the second base portion is provided, and the extension portion is disposed below the center pillar. I did it. Thereby, an unnecessary increase in the weight of the resin body is avoided while reliably performing necessary reinforcement, and ensuring of strength and rigidity and weight reduction are more effectively achieved.

It is a disassembled perspective view of the center pillar in embodiment of this invention. It is sectional drawing of the center pillar. The resin body arrange | positioned in the frame main body of a center pillar is shown, (a) is a side view, (b) is a front view, (c) is a top view. It is explanatory drawing of the area | region which should be reinforced which is a premise of this invention. It is sectional drawing which shows the basic shape of the rib of the said resin body. It is explanatory drawing of each site | part of the same resin body. It is sectional drawing for every site | part of the same resin body. It is sectional drawing of the center pillar which shows a movement control means. It is sectional drawing of the center pillar which shows the other example of a movement control means. It is a perspective view which shows the other example of the resin body.

  Hereinafter, an embodiment in which the vehicle frame structure according to the present invention is applied to a center pillar will be described.

  As shown in FIG. 1, the center pillar 1 includes an outer panel 2, an inner panel (not shown), an outer reinforcement panel (hereinafter referred to as “outer rain”) 3 disposed between them, and an inner reinforcement. A reinforcement panel (hereinafter referred to as “inner rain”) 4 and a pair of front and rear reinforcing resin bodies 20 and 30.

  As shown in FIG. 2, the outer rain 3 has a substantially U shape having a central surface portion 3 a and side portions 3 b and 3 b continuing on both sides thereof, and the inner rain 4 has a substantially flat plate shape. The flange portions 3c and 3c provided at the end portions of the side surface portions 3b and 3b of the outer rain 3 and the flange portions 4a and 4a provided at both end portions of the inner rain 4 are joined together, so that the cross-sectional shape is hollow. The tubular frame body 10 is formed in a substantially rectangular shape and extends in the vertical direction.

  As shown in FIG. 1, the upper and lower ends of each component of the center pillar 1 such as the frame main body 10 and the outer panel and inner panel are joined to the roof side rail component 5 and the side sill component 6 respectively. The side of the car body is formed.

  Here, as shown in FIG. 2, the central surface portion 3 a of the outer rain 3 is arranged so as to face outward of the vehicle body, so that the central surface portion 3 a acts from the outside when the frame body 10 collides with the side. A first surface portion 11 that receives a force in the compressive direction due to a bending load, and a surface constituted by the inner rain 4 faces the first surface portion 11 and a second surface portion 12 that receives a force in the tensile direction due to the bending load; The surfaces formed by the side surface portions 3 b and 3 b on both sides of the outer rain 3 are the third surface portions 13 and 13 positioned between the first surface portion 11 and the second surface portion 12. As a result, the corners a and a on the vehicle exterior side are between the first surface part 11 and the third surface parts 13 and 13 on both sides, and the vehicle interior side is between the second surface part 12 and the third surface parts 13 and 13 on both sides. Corners b and b are respectively formed.

  Further, as described above, a pair of front and rear resin bodies 20 and 30 that are long in the vertical direction are disposed inside the frame body 10. As shown in FIGS. 2 and 3, the resin bodies 20 and 30 each have a substantially U-shaped cross-section extending in the vertical direction in a shape corresponding to the shape of the front portion and the rear portion of the internal space of the frame body 10, respectively. 21 and 31 and a large number of ribs 22 and 32 arranged at predetermined intervals in the longitudinal direction so as to cross the inside of these connecting portions 21 and 31.

  The resin bodies 20 and 30 are disposed at the front and rear portions of the internal space of the frame body 10 with the open surfaces of the connecting portions 21 and 31 facing each other, as shown in FIG. The foaming adhesives 41 and 41 applied to the outer surfaces of the connecting portions 21 and 31 are foamed to be joined to the inner surfaces of the side portions 11 to 13 of the frame body 10.

  The ribs 22 and 32 of the resin bodies 20 and 30 reinforce the frame main body 10 against various loads acting on the frame main body 10 or effectively transmit the load to suppress deformation of the frame main body 10. The shape of the ribs 22 and 32, the reinforcing performance and the load transmission performance, and the shape of the ribs 22 and 32 are as follows. The relationship will be described.

  First, referring to FIG. 4, when a region in which the distortion is caused by various loads in the frame body 10 and a load transmission region are examined, the center pillar 1 bends the pillar 1 from the outside to the inside of the vehicle at the time of a side collision of the vehicle. Such a bending load acts, and at this time, strain concentrates on the corner portions a and a on both sides of the first surface portion 11 that directly receives the load of the frame body 10.

  Therefore, as shown in FIG. 4A, with respect to the bending load at the time of a side collision, a substantially triangular region a ′ in the corners a, a on the first surface portion 11 side (vehicle outer side) of the frame main body 10. In order to reinforce a 'and transmit the load acting on the corners a, a to the vehicle interior side, the second surface portion 12 side (vehicle interior side) from the regions a', a 'along the third surface portion 13 It is effective to reinforce the substantially triangular regions a ″ and a ″ extending to the frame body 10 in order to suppress deformation of the frame body 10.

  In addition, since the bending load shows the same tendency over substantially the entire length of the center pillar 1 in the up-down direction, the above countermeasures are the same over substantially the entire length of the center pillar 1 in the up-down direction.

  Further, when the vehicle rolls over, a roof crash load is applied to the center pillar 1, but the pillar 1 is bent outward at a relatively upper portion of the pillar 1 where this load acts as a bending load. In this part, the strain concentrates in a region along the third surface portion 13 from the corners b, b on both sides of the second surface portion 12 of the frame body 10 toward the first surface portion 11 side.

  Therefore, as shown in FIG. 4B, the bending load caused by the roof crash is changed along the third surface portion 13 from the corner portions b and b on the second surface portion 12 side (inner side) of the frame body 10. Reinforcing the substantially triangular regions b ′ and b ′ extending to the first surface portion 11 side (vehicle outer side) is effective in suppressing deformation of the frame body 10.

  The roof crash load also acts on the center pillar 1 in the direction in which the pillar 1 is bent inwardly above and below the portion, but the magnitude is larger than the load that is bent outward in the portion. Small. Then, at the lower part of the center pillar 1, the influence due to the roof crash load substantially disappears.

  Furthermore, when a torsional load is applied to the vehicle body due to road surface irregularities or the like, distortion is concentrated on the center pillar 1 at the corners b, b on both sides of the second surface portion 12 of the frame body 10.

  Therefore, as shown in FIG. 4 (c), in order to improve the torsional rigidity of the vehicle body, the substantially triangular region b of the corners b, b on the second surface 12 side (inner side) of the frame body 10 is provided. It is effective to reinforce “, b” and suppress deformation of the frame body 10. It should be noted that the influence of the torsion of the vehicle body substantially disappears at the lower part of the center pillar 1.

  In order to effectively suppress the deformation of the frame body 10 with respect to any of the above loads, as shown in FIG. 4 (d), inside the third surface portions 13 and 13 on both sides, Each of the regions a ′, a ″, b ′, b ″ shown in FIGS. (A) to (c) may be reinforced by combining the regions c and c. Even if the reinforcement is performed beyond the areas c and c, the reinforcing effect against the increase in weight of the reinforcing resin body is lowered.

  Based on the above examination results, the ribs 22 and 32 of the reinforcing resin bodies 20 and 30 disposed in the frame body 10 have a basic shape as shown in FIG.

  That is, the ribs 22 and 32 match the corners a and a on the vehicle outer side on both sides of the first surface portion 11 of the frame body 10, and are formed on the inner surfaces of the corners a and a via the connecting portions 21 and 31. The first base portions 22a and 32a to be joined respectively match the corners b and b on the vehicle inner side on both sides of the second surface portion 12 of the frame body 10, and the corner portions b and b are connected via the connecting portions 21 and 31, respectively. The second base portions 22b and 32b to be joined to the inner surface of b and the first and second base portions 22a and 22b and 32a and 32b, respectively, are integrated with each other. Intermediate portions 22c and 32c joined to the third surface portions 13 and 13 on both sides of the frame main body 10, respectively.

  Here, the first base portions 22a and 32a exclusively reinforce the regions a ′ and a ′ in FIG. 4, the second base portions 22b and 32b exclusively reinforce the regions b ″ and b ″, and an intermediate portion. 22c and 32c reinforce the regions a ″ and b ′ excluding the reinforcing region formed by the first and second base portions 22a, 22b, 32a and 32b, respectively.

  Then, in order to remove the portions not corresponding to the regions a ′, b ′, a ″, b ″, the ribs 22 and 32 are provided with recesses 22e and 32e in the side portions 22d and 32d facing the central portion of the frame body 10. The overall shape is a shape substantially corresponding to the integrated reinforcing region c in FIG.

  Further, the reinforcing function or load transmitting function required for the ribs 22 and 32 differs depending on the vertical position of the resin bodies 20 and 30, that is, the vertical position of the center pillar 1. The shape of 22 and 32 is set to a different shape in each part of the up-and-down direction, and the relationship between the reinforcement performance and load transmission performance and the shape of the ribs 22 and 32 is explained for each part.

  First, the vertical section of the resin bodies 20 and 30 will be described with reference to FIG. 6. In the resin bodies 20 and 30, the outer rain 3 and the inner rain 4 of the frame body 10 are joined to the roof side rail constituting member 5. A portion 1 located in the upper end portion or in the vicinity thereof, a portion 2 having a relatively short vertical dimension following the lower portion, and a harness insertion hole 4b provided in the central portion in the vertical direction of the inner rain 4 following the lower portion. A part 3 up to a position corresponding to the position immediately below and a part 4 up to the lower end located immediately above the part where the outer rain 3 and the inner rain 4 are joined to the side sill component 6 are further divided. (Part 4 corresponds to an extension in the claims).

  And the ribs 22 and 32 of the resin bodies 20 and 30 are respectively made into the following shapes according to each said site | part.

First, in the part 1, as shown in FIG. 7 (a), the recesses 22e and 32e provided on the sides facing the center of the frame body 10 of the ribs 22 ₁ and 32 ₁ are provided slightly inside the vehicle. The outer first base portions 22a and 32a are formed larger than the inner second base portions 22b and 32b.

  Therefore, the corners a, a on the outside of the vehicle where the distortion due to the bending load at the time of a side collision in the frame body 10 is concentrated are reinforced, and the resin bodies 20, 30 are connected to the corners a, a. Through the 1 base portion 22a, 32a, the intermediate portion 22c, 32c and the second base portion 22b, 32b, the load transmission and dispersion to the corners b, b on the inside of the vehicle are favorably performed. The concentration of distortion at the corners a, a on the vehicle outer side of the frame body 10 is suppressed, and the deformation of the frame body 10 or the center pillar 1 at the time of a side collision is effectively suppressed.

In the site 2, ribs ₂₂ 2, 32 _2, as shown in FIG. 7 (b), the recess 22e provided in the side portion facing the central portion of the frame body 10, 32e is provided closer to the vehicle exterior The second base portions 22b and 32b on the vehicle interior side are formed larger than the first base portions 22a and 32a on the vehicle exterior side.

  As a result, the corners a, a on the outside of the vehicle where the distortion due to the bending load at the time of the side collision is concentrated are reinforced by the first base portions 22a, 32a, and in addition, the frame body 10 accompanying the roof crash load is The corners b and b on the vehicle inner side where the strain due to a large bending load that is bent outwardly concentrates are formed by the second base portions 22b and 32b and the intermediate portions 22c and 32c on the vehicle inner side of the resin bodies 20 and 30. Reinforcement is made in a wide area extending over the surface portion 13, and deformation of the frame body 10 or the center pillar 1 at the time of falling is effectively suppressed.

Moreover, in the part 3, as shown in FIG. 7C, the ribs 22 ₃ and 32 ₃ are provided with recesses 22e and 32e provided on the side facing the center of the frame main body 10 slightly inside the vehicle. The first base portions 22a and 32a on the vehicle outer side are formed larger than the second base portions 22b and 32b on the vehicle inner side.

This shape, similar to the ribs 22 _1, 32 ₁ in the region 1, the vehicle exterior side corner portion a distortion due to the bending load of the side collision in the frame body 10 is concentrated, with a is intensively reinforced, The transmission and distribution of the load from the corners a and a to the corners b and b on the inside of the vehicle are performed satisfactorily, and the deformation of the frame body 10 or the center pillar 1 at the time of a side collision is effectively suppressed. Will be.

The rib _{22 1-22} 3 ₃₂ 1-32 ₃ at the site 1-3 above, but is intended to reflect the basic shape shown in FIG. 5, in the region 4, the rib ₂₂ 4, 32 _4, 7 As shown in (d), the vehicle is composed of bases 22a ′ and 32a ′ on the outside of the vehicle and legs 22c ′ and 32c ′ extending from the bases 22a ′ and 32a ′ along the third side 13 of the frame body 10. The portion corresponding to the second base in each of the parts 1 to 3 is not provided.

  That is, in this part 4, the bending load at the time of side collision is received in the same way as the parts 1 to 3, but the roof crash load at the time of rollover and the torsional load of the vehicle body are rarely affected. Only deformation due to load is suppressed.

  As a result, in any of the parts 1 to 4, the first base portions 22a and 32a and the base portions 22a ′ and 32a ′ of the ribs 22 and 32, the intermediate portions 22c and 32c, and the leg portions 22c ′ and 32c ′ are used. In addition, the center pillar 1 or the frame body 10 at the time of a side collision is effectively reinforced against a bending load that bends inward, and particularly in the region 2, the second base portions 22b and 32b cause a roof crash. The center pillar 1 or the frame main body 10 is effectively reinforced against a load that bends outward.

  Further, in the parts 1 to 3, the second base portions 22b and 32b of the ribs 22 and 32 suppress deformation due to deformation due to the torsional load of the vehicle body, thereby improving the torsional rigidity of the vehicle body and improving the steering stability of the vehicle. Will do.

  And in the said parts 1-3, it is in the site | part which does not receive the influence of each said load so much, specifically the site | part 22d and 32d of the ribs 22 and 32 in the substantially middle part which faces the center part of the frame main body 10. By providing the recesses 22e and 32e and not providing the second base at the portion 4, an unnecessary weight increase of the resin bodies 20 and 30 is avoided, and the reinforcing function and load required for the resin bodies 20 and 30 are avoided. The weight is reduced while securing the transmission function.

  Further, in the ribs 22 and 32, the concave portions 22e and 32e are formed in a curved shape. Therefore, for example, as shown in the comprehensive reinforcing regions c and c shown in FIG. Compared with the case where the corners c ′ and c ′ are formed, stress concentration in the recesses 22e and 32e is relaxed, and the strength and durability of the ribs 22 and 32, and consequently the resin bodies 20 and 30 are improved. become.

  By the way, when the resin bodies 20 and 30 are disposed inside the frame body 10, unfoamed foaming adhesives 41 and 41 are applied to the outer surfaces of the connecting portions 21 and 31 of the resin bodies 20 and 30, respectively. By foaming, the resin bodies 20 and 30 are joined closer to the third side portions 13 and 13 on both sides in the frame main body 10, but when the foaming adhesives 41 and 41 are foamed, the frame main body 10 There is a possibility that the resin bodies 20 and 30 respectively disposed near the third surface portions 13 and 13 on both sides of the frame move to the center portion of the frame body 10 so as to approach each other. In this case, the resin bodies 20 and 30 May be displaced from the optimal position, and the reinforcing function and the load transmitting function may be deteriorated.

  On the other hand, it is conceivable to provide a movement restricting means for preventing the pair of resin bodies 20 and 30 from moving toward the center of the frame body 10 when the foaming adhesives 41 and 41 are foamed, as shown in FIG. In the example, beads x and y that enter between the resin bodies 20 and 30 on both sides are provided on the central surface portion 3a of the outer rain 3 and the inner rain 4 that constitute the first surface portion 11 and the second surface portion 12 in the frame body 10, Thereby, the movement of the resin bodies 20 and 30 to the frame body center side when the foaming adhesives 41 and 41 are foamed is prevented. Note that the bead x and y of the outer rain 3 and the inner rain 4 may be either one if possible.

  Further, in the example shown in FIG. 9, a connecting portion z that connects the connecting portions 21 and 31 in the resin bodies 20 and 30 over the entire length of the resin bodies 20 and 30 or partially is provided, whereby both the resin bodies 20 and 30 are provided. These positional relations may be fixed to prevent the resin bodies 20 and 30 from moving toward the center of the frame body when the foaming adhesives 41 and 41 are foamed.

  Moreover, if a required reinforcement function and load transmission function are ensured, it will be lighter in the structure which consists of the connection parts 21 and 31 and the ribs 22 and 32 like the resin bodies 20 and 30 of the above embodiment. However, if necessary, as shown in FIG. 10, the resin bodies 20 ′ and 30 ′ (only one is shown) are connected to the first base portions 22a ′ and 32a ′ and the second base portions 22b ′ and 32b. A cross-sectional shape having 'and intermediate portions 22c' and 32c '(base portion and leg portions in the portion 4) may be continuous in the longitudinal direction of the resin bodies 20' and 30 '. In this case as well, the concave portions 22e 'and 32e' are provided in the middle of the side portions 22d 'and 32d' facing the central portion of the frame body, thereby avoiding unnecessary weight increase.

  As described above, according to the present invention, a frame structure excellent in the side impact resistance, rollover resistance, and steering stability performance of the vehicle body is realized. It may be suitably used in the field.

DESCRIPTION OF SYMBOLS 1 Center pillar 10 Frame main body 11 1st surface part 12 2nd surface part 13 3rd surface part a, b Corner | angular part 20, 30 Resin body 21, 22 Connection part 22, 23 Rib 22a, 32a 1st base 22b, 32b 2nd base 22c , 32c Intermediate part 22e, 32e Recessed part 22a ', 32a' Base part 22c ', 32c' Leg part

Claims (7)

A vehicle frame structure in which a resin body for reinforcing the frame body is disposed inside the tubular frame body,
The frame main body is positioned between the first surface portion facing the outer side of the vehicle body, the second surface portion on the vehicle interior facing the first surface portion, and the first surface portion and the second surface portion. It has third surface portions on both sides that form corners with the second surface portion, and the cross-sectional shape is formed in a substantially rectangular shape with a hollow shape,
A pair of the resin bodies are provided and arranged near the third surface portions on both sides of the frame body,
In addition, each resin body includes a first base portion that matches a corner portion formed between the first surface portion and the third surface portion of the frame main body and is joined to the inner surface of the corner portion, and a second base of the frame main body. A second base portion that matches a corner portion formed between the surface portion and the third surface portion and is joined to the inner surface of the corner portion; and the first and second base portions are connected to integrate them, and the frame body And an intermediate portion joined to the inner surface of the third surface portion of
A vehicle frame structure characterized in that a concave portion that is recessed toward the third surface portion side is provided at an intermediate portion of a side portion facing the central portion of the frame body in the resin body.   The vehicle frame structure according to claim 1, wherein the recess is provided in a curved shape.   3. The vehicle frame according to claim 1, wherein the resin body includes a plurality of ribs arranged in a longitudinal direction of the frame body and a connecting portion that connects the ribs. Construction.   The resin body is joined to each joint portion to the frame body by a foaming adhesive, and prevents a pair of resin bodies from moving toward the center of the frame body when the foamed adhesive is foamed. The vehicle frame structure according to any one of claims 1 to 3, wherein a movement restricting means is provided.   5. The vehicle frame structure according to claim 4, wherein the movement restricting means is a coupling portion that couples the pair of resin bodies.   The movement restricting means is a bead that is provided on at least one of the first surface portion and the second surface portion of the frame main body and that enters between the pair of resin bodies and prevents the resin bodies from approaching each other. The vehicle frame structure according to claim 4.   The frame main body constitutes a center pillar of the vehicle, and the resin body has a downward extension portion disposed at a lower portion of the center pillar, and the extension portion is formed on the frame main body. A base portion that matches a corner portion formed between the first surface portion and the third surface portion and is joined to the inner surface of the corner portion, and extends from the base portion to the second surface portion side along the third surface portion. The vehicle frame structure according to any one of claims 1 to 6, wherein the vehicle frame structure includes a leg portion joined to the surface portion.

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