JP2021020650A - Canister mounting structure - Google Patents

Abstract

To provide a canister mounting structure which prevents collision of a canister with an important component such as a fuel tank at a collision, and has a high degree of layout freedom.SOLUTION: A bracket 10 for mounting a canister 8 includes: a first member 11 which extends in a longitudinal direction between an important component (5) and the canister 8 and has a pair of panel mounting parts 15 mounted on a lower surface of a floor panel 4 of a vehicle body 1; and at least one second member 12 which has second main body parts (21, 31) extended to an outside of a vehicle from an intermediate part of the first member 11 in a longitudinal direction, vehicle body mounting parts (25, 35) mounted on a component member (2) of the vehicle body, and support parts (28, 32) for supporting the canister 8. Flexural rigidity of the first member 11 to input from an extension direction of the second main body parts (21, 31) is higher than that of the second member 12, and the second member 12 is bent and deformed when a collision load is input from the outside of the vehicle.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a canister mounting structure for mounting a canister on a vehicle body via a bracket.

Important safety parts such as fuel tanks are placed in the space between the pair of side members, the canister is placed in the side load input deformation area between the side sill and the side members, and the canister inputs the side load to the vehicle. A known mounting structure of a canister, which is mounted on a vehicle body frame such as a side sill or a side member by a fixing member so as to fall off due to an impact at the time (Patent Document 1). According to this, interference with important parts such as a fuel tank is prevented, and the design freedom of the underfloor is improved.

Further, the mounting structure of the canister mounted on the cross member via the canister mounting bracket having a downwardly convex bent shape in a posture in which the canister is tilted forward so that the front portion is downward behind the cross member is known. (Patent Document 2). According to this, when an impact load is applied, the mounting bracket is deformed starting from the bent portion to absorb the impact, and the canister is suppressed from interfering with the fuel tank.

Japanese Unexamined Patent Publication No. 2006-200425 Japanese Patent No. 5211659

However, in the conventional structure, the canister is attached to the vehicle body by a relatively low-rigidity bracket that deforms at the time of collision so as not to interfere with the fuel tank at the time of collision. Further, the bracket is attached to a highly rigid vehicle body member (body frame) such as a side sill, a side member, and a cross member. Therefore, the mounting position of the bracket is limited, and the degree of freedom in layout is low.

In view of such a background, it is an object of the present invention to provide a canister mounting structure that prevents a canister from colliding with an important part such as a fuel tank at the time of a collision and has a high degree of layout freedom.

In order to solve such a problem, in one embodiment of the present invention, a bracket (10) is located adjacent to the outside of the vehicle (for example, the left side) with respect to the important component (5) attached to the lower surface of the vehicle body (1). ) Is a canister mounting structure for mounting the canister (8), and the bracket is provided between the important component and the canister in a direction in which the important component and the canister face each other. A first member having a pair of panel mounting portions (15) extending along the lower surface of the vehicle body (for example, in the front-rear direction) so as to be substantially orthogonal to each other and attached to the lower surface of the floor panel (4) of the vehicle body. (11), the second main body portion (21, 31) extending from the intermediate portion in the longitudinal direction of the first member to the outside of the vehicle, and the vehicle body mounting portion (25,) attached to the constituent member (2) of the vehicle body. 35) and at least one second member (12 (12A, 12B)) having a support portion (28, 32) for supporting the canister, and an extension of the second main body portion of the first member. The bending rigidity with respect to the input from the direction is higher than the bending rigidity of the second member.

According to this configuration, the second member is easily bent and deformed with respect to the input from the extending direction of the second main body, so that the second member is bent and deformed when the collision load is input from the outside of the vehicle. It becomes difficult to transmit the collision load to the first member. Therefore, the mounting positions of the first member and the second member of the bracket are not limited to the highly rigid portion of the vehicle body, and the degree of freedom in layout is improved. Further, since the second member that is easily bent and deformed has a support portion that supports the canister, the canister is displaced so as to retract from the adjacent position on the outside of the vehicle due to the bending deformation of the second member in the event of a collision. , There is no significant displacement from the first member to the important part side. Therefore, it is possible to prevent the canister from interfering with important members arranged adjacent to the inside of the vehicle.

In the above configuration, the first member (11) may have a main body portion (14) having a closed cross-sectional shape that internally defines a hollow portion between the pair of the panel mounting portions (15).

According to this configuration, since the first member has a main body portion having a hollow closed cross-sectional shape, the bending rigidity of the first member can be increased with a small amount of material. Therefore, it is possible to suppress the displacement of the canister to the important component side and the weighting of the bracket at the time of a collision.

In the above configuration, the second main body portions (21, 31) of the second member (12) are oriented downward in the intermediate portion in the longitudinal direction when an axial load is applied from the outside of the vehicle. It is preferable to have a curved fragile portion (26, 36, 66).

According to this configuration, at the time of a collision, the second member is deformed so as to be convex downward from the fragile portion of the second main body portion. Since the second member supports the canister, the canister is displaced downward according to the deformation of the second member. Therefore, the displacement of the canister toward the important parts is suppressed, and the canister is prevented from interfering with the important parts arranged inside the vehicle of the first member.

In the above configuration, the first member (11) has a bending inducing portion (52, 62) in an intermediate portion in the longitudinal direction that induces bending in an upwardly convex direction when a compressive load in the axial direction is applied. However, at least one of the second members (12) includes two of the second members (12A, 12B) provided at different positions in the longitudinal direction of the first member so as to sandwich the bending inducing portion. It is preferable that the canister (8) is arranged over the support portions (28, 32) of the two second members.

According to this configuration, since the two second members are provided so as to sandwich the bending inducing portion, the joint portion of the two second members is raised to the same extent when an axial compressive load is applied to the first member. Displace to. Therefore, when the first member is deformed by the axial compressive load, the canister that is displaced downward due to the deformation of the second member is excessively displaced downward, and the canister is tilted with respect to the extending direction of the first member. It is possible to suppress the displacement so as to be performed. As a result, the canister's contact with the ground can be effectively suppressed.

In the above configuration, the support portion (28, 32) may be provided so as to project from the corresponding second main body portion (21, 31) and may be located between the two second main body portions.

According to this configuration, since the canister attached to the support portion is arranged within the range surrounded by the second main body portion, the second main body portion of the second member receives a collision load from the outside of the vehicle and the second main body portion of the second member lowers the fragile portion. When deformed so as to project to, it is displaced downward between the two second members. Therefore, it is possible to prevent the canister from being sandwiched between the portion of the second member on the side of the first member and the portion on the outside of the vehicle. As a result, damage to the canister is suppressed.

In the above configuration, at least one of the second members (12) has a joint portion (23, 33) with respect to the first member (11) and the vehicle body mounting portion (25, 35) having substantially the same height as each other. The canister (8) may be arranged above the second member.

According to this configuration, when the second member is deformed so as to be convex downward due to a collision load from the outside of the vehicle and the canister is displaced downward, the portion of the bracket on the side of the first member or the first member The canister is sandwiched between the bracket and the outer part of the vehicle body or the components of the vehicle body on the vehicle body side. Therefore, it is possible to prevent the canister from being displaced beyond the first member to the inside of the vehicle, the canister being excessively displaced downward, and the canister from falling off.

In the above configuration, at least one of the support portions (28, 32) of the second member (12) is attached to one of the first member (11) side and the vehicle outer side along the longitudinal direction of the second member. It is preferable that at least two fastening holes (39) arranged in the above are formed, and one of the fastening holes is a reference hole for positioning.

According to this configuration, when a load at the time of a collision is applied to the canister, the canister transmits the load from the reference hole to the fragile portion of the second member without rattling, and effectively deforms the second member. At the same time, the movement of the canister in the extending direction of the second main body portion is suppressed, so that the canister does not displace significantly toward the important component side from the first member.

In the above configuration, the important component is a fuel tank (5), a secondary battery for traveling, or a fuel cell.

According to this configuration, it is possible to prevent the fuel tank, the secondary battery for traveling, or the fuel cell from being damaged due to the interference of the canister in the event of a collision.

As described above, according to the present invention, it is possible to provide a canister mounting structure that prevents a canister from colliding with an important component such as a fuel tank at the time of a collision and has a high degree of freedom in layout.

Bottom view of the main part of the car body to which the canister mounting structure is applied II-II sectional view in FIG. A perspective view of the bracket shown in FIG. 1 as viewed diagonally upward from the front. Side view of the first member shown in FIG. V arrow view in FIG. Explanatory drawing of bracket deformation and canister displacement at the time of side collision Side view of the first member according to the first modification (A) side view, (B) BB sectional view, (C) CC sectional view of the first member according to the second modification. Bottom view of the second member according to the third modification

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a bottom view of a main part of a vehicle body 1 to which a canister mounting structure is applied, and FIG. 2 is a sectional view taken along line II-II in FIG. As shown in FIGS. 1 and 2, the vehicle body 1 is composed of a skeleton member and a panel member joined to the skeleton member. The skeleton member is a member having a closed cross section formed by a plurality of press-molded panel members, or a member press-molded into a channel shape by a panel member. In the lower part of the vehicle body 1, side sills 2 extending in the front-rear direction are provided as skeleton members along the left and right side edges, and a plurality of cross members 3 extending in the left-right direction (vehicle width direction) are left and right at appropriate positions. Side sill 2 is connected. A floor panel 4 made of a panel member is joined to the upper surface of these skeleton members.

A space is formed inside the left and right side sills 2 and below the floor panel 4 between the front and rear cross members 3, and the fuel tank 5 is arranged in this space. The fuel tank 5 is supported from below by a skeleton member of the vehicle body 1, specifically, a plurality of band members 6 extending in the front-rear direction spanning the front-rear cross members 3 (only one at the left end is shown). There is. The plurality of band members 6 are connected to each other by connecting members 7 extending in the vehicle width direction. The fuel tank 5 is an important component that should prevent damage as much as possible when the outer peripheral portion of the vehicle body 1 is deformed due to a vehicle collision, and is provided at a position separated from the left and right side sills 2 to the inside of the vehicle.

A canister 8 (charcoal canister) is arranged in the space between the side sill 2 on the left side and the fuel tank 5, that is, on the left side of the fuel tank 5. The canister 8 adsorbs and holds the fuel vapor (vapor) generated in the fuel tank 5, and releases the held vapor during engine operation. By sending the vapor released from the canister 8 to the intake system, the discharge of the fuel vapor to the outside air is suppressed. A plurality of connection pipes (not shown) connected to the fuel tank 5 and the intake system are connected to the canister 8. The canister 8 is attached to the vehicle body 1 via the bracket 10.

FIG. 3 is a perspective view of the bracket 10 as viewed diagonally upward from the front. As shown in FIGS. 1 to 3, the bracket 10 is a long first member extending in the front-rear direction, which is a direction substantially orthogonal to the vehicle width direction in which the fuel tank 5 and the canister 8 face each other. It has 11 and two second members 12 (12A, 12B) extending to the left from the intermediate portion in the longitudinal direction of the first member 11. The second member 12 includes a front side second member 12A and a rear side second member 12B provided at different positions in the front-rear direction.

The first member 11 is formed by processing a steel pipe, and is provided at both ends in the axial direction and a first main body portion 14 having a closed cross-sectional shape that defines a hollow portion inside, and is provided on the lower surface of the floor panel 4. It has a pair of panel mounting portions 15 to be mounted on. As described above, the first member 11 has the first main body portion 14 having a hollow closed cross-sectional shape between the pair of panel mounting portions 15, so that high bending rigidity is imparted with a small amount of material. The panel mounting portion 15 is configured by forming bolt insertion holes 16 for fastening in two plate-shaped portions that are overlapped with each other by crushing the end portion of the steel pipe by crushing. The first member 11 is arranged between the fuel tank 5 and the canister 8, and is fastened to the lower surface of the floor panel 4 of the vehicle body 1 by a fastening bolt 17 (FIG. 1) in a pair of panel mounting portions 15.

The front side second member 12A is a stamped product of an integral body formed by pressing a steel plate, has a main surface facing up and down, and has a front side second main body portion 21 extending in the left-right direction. There is. At the right end of the front second main body portion 21, a front joint portion 23 formed in an arc shape along the lower half of the first member 11 and joined to the first member 11 by welding is formed. At the left end of the front second main body 21, a front vehicle body mounting portion 25 having a bolt insertion hole 24 for fastening is formed so as to be mounted on the lower surface of the side sill 2. The front second member 12A is fastened to the lower surface of the side sill 2 of the vehicle body 1 at the front vehicle body mounting portion 25 by fastening bolts 17 (FIGS. 1 and 2).

The front second main body 21 has a front bent portion 26 that bends downward at an intermediate portion in the longitudinal direction, and has an obtuse-angled V-shape. A front flange 27 that is raised downward along the front edge is formed at the front end of the front second main body 21. The front flange 27 includes two tapered portions whose height is lower as it is closer to the front bent portion 26 of the front second main body portion 21. The front bending portion 26 of the front second main body portion 21 forms a fragile portion that curves downward when the front second member 12A receives an axial load from the left side, which is the outside of the vehicle. The front flange 27 can be easily integrally molded with the front second main body 21 by press molding, and can be carried out at low cost because it is not necessary to assemble a separate member. Further, by adjusting the height of the front flange 27 along the extending direction of the front second main body 21, a fragile portion can be easily formed on the front second main body 21.

At the rear end of the front second main body 21, a front support 28 is formed which projects rearward from the rear edge of the right side of the front bent 26 of the front second main body 21 and supports the front end of the canister 8. Has been done. Therefore, when the front second member 12A is deformed by receiving an axial load from the outside of the vehicle, the front support portion 28 is displaced together with the portion on the right side with respect to the front bent portion 26. One fastening hole 29 is formed in the front support portion 28.

The rear side second member 12B is a stamped product of an integral piece formed by pressing a steel plate, and has a rear side second main body 31 extending to the left and right and a front edge of the rear second main body 31. It has a rear support portion 32 that protrudes forward from the front and extends to the left and right. The rear support portion 32 extends to the right with respect to the right end of the rear second main body portion 31, and is formed in an arc shape at the right end of the rear support portion 32 along the lower half of the first member 11. A rear joint portion 33 is formed which is joined to the first member 11 by welding. That is, the rear second main body portion 31 extends to the left from the intermediate portion in the longitudinal direction of the first member 11 via the rear side joint portion 33 and the rear side support portion 32. The rear second main body 31 extends to the left with respect to the left end of the rear support 32, and the left end of the rear second main body 31 is for fastening so as to be attached to the lower surface of the side sill 2. The rear vehicle body mounting portion 35 in which the bolt insertion hole 34 is formed is formed. The rear second member 12B is fastened to the lower surface of the side sill 2 of the vehicle body 1 by the fastening bolt 17 (FIG. 1) at the rear vehicle body mounting portion 35.

The rear second main body 31 has a rear bent portion 36 that bends downward at an intermediate portion in the longitudinal direction, and has an obtuse-angled V-shape. The rear second main body 31 and the rear support 32 are continuous with each other in a portion on the right side of the rear bent portion 36. At the front end of the rear second main body 31, a rear flange 37 is raised downward along the front edge of a portion on the left side of the rear bent portion 36 (a portion not continuous with the rear support portion 32). Is formed. The rear flange 37 includes a tapered portion whose height is lower as it is closer to the rear bent portion 36. The rear bent portion 36 forms a fragile portion that curves in a downwardly convex direction when the rear second member 12B receives an axial load from the left side, which is the outside of the vehicle. At this time, the rear support portion 32 is displaced with respect to the rear bent portion 36 together with the portion of the rear second main body portion 31 on the right side (a portion continuous with each other). The rear flange 37 can be easily integrally molded with the rear second main body 31 by press molding, and can be carried out at low cost because it is not necessary to assemble a separate member. Further, by adjusting the height along the extending direction of the rear second main body 31, a fragile portion can be easily formed on the rear second main body 31.

The rear support portion 32 is a portion that supports the rear end of the canister 8, and extends to the left with respect to the continuous portion with the rear second main body portion 31. In other words, a notch 38 extending from the left end to the rear bent portion 36 is formed in a continuous portion of the rear support portion 32 and the rear second main body portion 31 that overlap each other in the left-right direction. Two fastening holes 39 (39A, 39B) arranged along the longitudinal direction are formed in the rear support portion 32. As described above, the front support portion 28 of the front second member 12A and the rear support portion 32 of the rear second member 12B are provided so as to project from the corresponding front second main body 21 and the rear second main body 31. It is located between the two second main bodies (21, 22) (that is, within the range surrounded by the two second main bodies (21, 22) and the first member 11).

One (39A) of the two fastening holes 39 is arranged at a position aligned with the rear bending portion 36 in the left-right direction. The other (39B) of the two fastening holes 39 is arranged in the vicinity of the rear joint 33 with respect to the first member 11. Of the three fastening holes 29 and 39 formed in the bracket 10, the fastening hole 39A arranged in the vicinity of the rear bending portion 36 is a positioning reference hole that serves as a reference for the position when the canister 8 is attached. .. Here, the reference hole is a hole having a size corresponding to the bolt, which is slightly larger than the diameter of the shaft portion of the bolt to be inserted. The other two are holes formed with a diameter slightly larger than the reference hole so that variations among parts can be absorbed during assembly.

The front vehicle body mounting portion 25 of the front second member 12A and the rear vehicle body mounting portion 35 of the rear second member 12B need only be attached to the constituent members of the vehicle body 1 and need to be attached to the side sill 2. Absent. In other embodiments, they may be attached to the floor panel 4 of the vehicle body 1.

As shown in FIGS. 1 and 2, the canister 8 is arranged on the left side, which is the outside of the vehicle, and has a first cylinder portion 41 extending in the front-rear direction and a diameter smaller than that of the first cylinder portion 41 and a first cylinder. It has a second tubular portion 42 having an axial length longer than that of the portion 41. The second cylinder portion 42 extends in the front-rear direction on the side of the fuel tank 5 with respect to the first cylinder portion 41, and is integrated with the first cylinder portion 41 so as to be aligned with the first cylinder portion 41 at the rear end. It is formed. The front end portion of the second tubular portion 42 projects forward with respect to the first tubular portion 41. The canister 8 is arranged above the two second members 12 over these support portions, the front support portion 28 and the rear support portion 32.

As shown in FIG. 1, the canister 8 is attached to the front second member 12A by fastening the front end portion of the second cylinder portion 42 to the front support portion 28 of the front second member 12A by one fastening bolt 43. It is attached. Further, the canister 8 is attached to the rear second member 12B by fastening the rear end portion to the rear support portion 32 of the rear second member 12B by two fastening bolts 43. That is, the canister 8 is provided on the support portions (front side support portion 28, rear side support portion 32) provided on the side portion of the first member 11 with respect to the fragile portions (26, 36) of the two second member 12. Be supported. The front second main body portion 21 of the front second member 12A is arranged at a position where the entire front side second main body portion 21 escapes forward from the front end of the canister 8. The rear second main body 31 of the rear second member 12B is arranged at a position where the canister 8 escapes rearward from the rear end.

The front second member 12A has the front bending portion 26 which is a fragile portion, and the rear second member 12B has the rear bending portion 36 which is a fragile portion, so that the front second main body portion 21 extends in the extending direction. The total bending rigidity of the second member 12 (12A, 12B) is lower than the bending rigidity of the first member 11 with respect to the input from a certain left side. That is, the second member 12 is easily bent and deformed by the collision load at the time of a side collision (side collision) of the vehicle. Therefore, when the collision load is input to the vehicle body 1 from the left side of the vehicle, the second member 12 is bent and deformed, which makes it difficult to transmit the collision load to the first member 11. Since the first member 11 has a higher bending rigidity than the second member 12, the mounting positions of the first member 11 and the second member 12 of the bracket 10 are limited to the highly rigid skeleton portion of the vehicle body 1. There is nothing. As a result, the degree of freedom in layout of the canister 8 and the bracket 10 is improved.

FIG. 4 is a side view of the first member 11 shown in FIG. As shown in FIG. 4, the first member 11 includes a downwardly curved portion 51 that curves downwardly on the front side of the intermediate portion in the longitudinal direction, and an upwardly curved portion 52 that curves upwardly on the rear side. have. The downward bending portion 51 is a bending inducing portion that induces bending in a downwardly convex direction when the first member 11 receives a compressive load in the axial direction. The upward bending portion 52 is a bending inducing portion that induces bending in an upwardly convex direction when the first member 11 receives a compressive load in the axial direction. Therefore, when the first member 11 receives a compressive load in the axial direction, the first member 11 is deformed so that the front portion is convex downward and the rear portion is convex upward (that is, Z-shaped or N-shaped).

As shown in FIG. 3, the front second member 12A is joined to the first member 11 in front of the lower curved portion 51, and the rear second member 12B is joined to the first member 11 behind the upper curved portion 52. It is joined to 11. That is, the front side second member 12A and the rear side second member 12B are provided at different positions in the longitudinal direction of the first member 11 so as to sandwich the upper bending portion 52 that induces the bending in the upwardly convex direction. ..

FIG. 5 is a view taken along the line V in FIG. As shown in FIG. 5, the front side second member 12A is arranged substantially horizontally so that the front side joint portion 23 and the front side vehicle body mounting portion 25 are substantially the same height as each other. The front bending portion 26 of the front second member 12A is bent so that the front second main body portion 21 is convex downward, and the height of the front flange 27 becomes smaller at the portion corresponding to the front bending portion 26. There is. Therefore, the front bending portion 26 forms a fragile portion, and when a collision load input from the outside of the vehicle acts as an axial compressive load on the front second member 12A, the front second member 12A undergoes a downwardly convex bending deformation. Trigger. The rear bent portion 36 also forms a fragile portion, and when a collision load input from the outside of the rear second member 12B vehicle acts on the front second member 12A as an axial compression load, the front second member 12A is affected. Induces a downwardly convex bending deformation.

Next, the operation of the canister mounting structure configured as described above at the time of a vehicle collision (at the time of a side collision) will be described with reference to FIG.

Before the side collision, as shown in FIG. 6A, the canister 8 is arranged between the side sill 2 and the fuel tank 5, and is attached to the vehicle body 1 via the bracket 10. As shown in FIG. 6B, when a collision load is input from the outside of the vehicle, the side sill 2 bends and deforms and moves to the inside of the vehicle. As a result, a compressive load in the axial direction acts on the second member 12 of the bracket 10.

The bending rigidity of the first member 11 is high, and the second main body portions (21, 31) of the second member 12 are fragile portions (front bending) that are curved in a downwardly convex direction when an axial load is applied from the outside of the vehicle. The portion 26 and the rear bending portion 36) are provided in the intermediate portion in the longitudinal direction. Therefore, the second member 12 that has received the compressive load is deformed so as to be convex downward from the fragile portion (front bending portion 26, rear bending portion 36). Since the canister 8 is supported by the support portions (front side support portion 28, rear side support portion 32) inside the vehicle rather than the fragile portion of the second member 12, the large-diameter first cylinder arranged on the outside of the vehicle The portion 41 is rotationally displaced about the first member 11 so as to retract downward. As a result, the displacement of the canister 8 toward the fuel tank 5, which is an important component, is suppressed, and the canister 8 is prevented from interfering with the fuel tank 5 arranged inside the vehicle of the first member 11.

When the side sill 2 further moves to the inside of the vehicle, as shown in FIGS. 6 (C) and 6 (D), the bending deformation that causes the fragile portion of the second member 12 to protrude downward becomes large. Along with this, the rotational displacement of the canister 8 becomes large, so that the first cylinder portion 41 of the canister 8 is displaced below the side sill 2. The second tubular portion 42 of the canister 8 is displaced to a position lower than the initial position, but is maintained at the same height as the lower part of the first member 11 and the side sill 2. As described above, the front support portion 28 and the rear support portion 32 are located between the two second main body portions (21, 31), and the canister 8 is attached to the front support portion 28 and the rear support portion 32. It is installed. Therefore, even if the bending angle of the second member 12 becomes large, the canister 8 is not sandwiched between the bent portion of the second member 12 on the side of the first member 11 and the portion on the outside of the vehicle.

Further, when the side sill 2 moves to the inside of the vehicle, the second cylinder portion 42 of the canister 8 is sandwiched between the side sill 2 and the first member 11 as shown in FIG. 6 (E). In this way, the canister 8 retracts the first cylinder portion 41 arranged on the outside of the vehicle downward and is sandwiched between the small-diameter second cylinder portion 42 arranged on the side of the first member 11. Therefore, the stroke from the initial position until the side sill 2 collides with the canister 8 becomes large, and the damage to the canister 8 is suppressed.

Further, as described with reference to FIG. 5, the second member 12 includes a front joint portion 23 and a rear joint portion 33 with respect to the first member 11, and a corresponding front vehicle body mounting portion 25 and a rear vehicle body mounting portion 35. Are arranged so that they are approximately the same height as each other. Since the canister 8 is arranged on the upper side of the second member 12, the first member 11 and the side sill 2 of the bracket 10 are displaced downward due to the deformation of the second member 12 by receiving a collision load from the outside of the vehicle. It is sandwiched by. As a result, it is possible to prevent the canister 8 from being displaced beyond the first member 11 to the inside of the vehicle, the canister 8 being excessively displaced downward, and the canister 8 from falling off.

As described above, in the present embodiment, the second member 12 which is easily bent and deformed supports the canister 8. Therefore, at the time of a collision, the canister 8 is displaced so as to retract from the adjacent position on the outside of the vehicle of the fuel tank 5 due to the bending deformation of the second member 12, while the canister 8 is largely displaced from the first member 11 to the fuel tank 5 side. There is no. Therefore, it is suppressed that the canister 8 interferes with the fuel tank 5 arranged adjacent to the inside of the vehicle, and the damage of the fuel tank 5 is suppressed.

Further, as described with reference to FIG. 4, the first member 11 has an upward curved portion 52 in the intermediate portion in the longitudinal direction, which induces an upwardly convex curvature when a compressive load in the axial direction is applied. .. Then, as described above, the front side second member 12A and the rear side second member 12B are provided so as to sandwich the upward curved portion 52. Therefore, when an axial compressive load is applied to the first member 11, the front joint portion 23 of the front second member 12A and the rear joint portion 33 of the rear second member 12B are displaced upward to the same extent. As a result, when the first member 11 is deformed by the axial compressive load, the canister 8 which is displaced downward due to the deformation of the second member 12 is suppressed from being excessively displaced downward. Further, at this time, the canister 8 is prevented from being displaced so as to be inclined with respect to the extending direction of the first member 11.

Further, since one of the plurality of fastening holes 39 (39A) formed in the rear support portion 32 of the rear second member 12B is a reference hole for positioning, a load at the time of collision is applied to the canister 8. In this case, the canister 8 transmits the load from the reference hole to the fragile portion of the rear second member 12B without rattling. As a result, the rear second member 12B can be effectively deformed, and the movement of the canister 8 in the extending direction of the rear second main body 31 is suppressed, so that the canister 8 is moved from the first member 11. There is no significant displacement to the fuel tank 5.

≪First modification≫
Next, a first modification of the present embodiment will be described with reference to FIG. 7. The same or similar elements as those in the above embodiment are designated by the same reference numerals, and duplicate description will be omitted. The same applies to the following modifications.

FIG. 7 is a side view of the first member 11 according to the first modification. As shown in the present modification, the configuration of the first member 11 of the bracket 10 is different from that of the above embodiment. Specifically, in the intermediate portion of the first main body portion 14 of the first member 11 in the longitudinal direction, an upwardly convex upward curved portion 52 has a gentle and longer axial length as compared with the above embodiment. It is provided so as to be curved. The upward bending portion 52 (particularly, an intermediate portion thereof) is a bending inducing portion that induces bending in an upwardly convex direction when the first member 11 receives a compressive load in the axial direction. Further, the panel mounting portions 15 provided at both ends of the first member 11 in the axial direction are inclined in the front-rear direction in accordance with the inclination of the first main body portion 14. Even if the first member 11 is configured in this way, the same effect as that of the above embodiment can be obtained.

≪Second modification≫
Next, a second modification of the present embodiment will be described with reference to FIG. 8 (A) is a side view of the first member 11 according to the second modification, FIG. 8 (B) is a sectional view taken along line BB in FIG. 8 (A), and FIG. 8 (C) is FIG. 8 (C). It is a cross-sectional view of CC in A). As shown in the present modification, in the present modification, a flat portion 62 in which the lower portion of the steel pipe is crushed upward to form a horizontally long substantially elliptical shape is formed in the intermediate portion in the longitudinal direction of the first main body portion 14 of the first member 11. It is provided. In the flat portion 62, the moment of inertia of area is smaller than that of the other portions of the first main body portion 14, and the neutral axis of the moment of inertia of area in the horizontal direction is located above. Therefore, the flat portion 62 is a bending inducing portion that induces a curvature in a direction that is convex upward when the first member 11 receives a compressive load in the axial direction. Even if the first member 11 is configured in this way, the same effect as that of the above embodiment can be obtained.

≪Third modification example≫
Next, a third modification of the present embodiment will be described with reference to FIG. FIG. 9 is a bottom view of the second member 12 according to the third modification. As shown in the present modification, the configuration of the second member 12 of the bracket 10 is different from that of the above embodiment. The second member 12 may be provided once with respect to the first member 11, or two may be provided. In the second member 12, two rigid patches 71 are joined to the upper surface or the lower surface of the second main body portion 21 so as to be separated from each other in the intermediate portion in the longitudinal direction. The portion to which the rigid patches 71 are joined has higher rigidity than the portion between the two rigid patches 71. Therefore, the portion between the two rigid patches 71 becomes the fragile portion 66 of the second member 12. Since the first member 11 is curved so as to project the fragile portion downward when it receives an axial compressive force, the second main body portion 21 becomes convex downward at the fragile portion 66 as in the above embodiment. It is good that it is bent like this. Even if the second member 12 is configured in this way, the same effect as that of the above embodiment can be obtained. When the rigidity patch 71 is joined to the second member 12 in this way, a highly rigid portion is formed in the second main body 21 while maintaining the thickness of the second main body 21 in the vehicle height direction. Therefore, the degree of freedom in layout of the bracket 10 is improved.

Although the description of the specific embodiment is completed above, the present invention can be widely modified without being limited to the above embodiment. For example, in the above embodiment, the fuel tank 5 is shown as an example of important parts in which the canister 8 is arranged adjacent to each other, but the important parts may be a secondary battery or a fuel cell for traveling. Further, in the above embodiment, the canister 8 is arranged on the vehicle side of the fuel tank 5, which is an important component, but the canister 8 may be arranged behind the fuel tank 5. Further, the bracket 10 may be composed of a first member 11 and one second member 12 joined to the first member 11, and the canister 8 may be supported by one second member 12. In addition, the specific configuration, arrangement, quantity, angle, material, etc. of each member or portion can be appropriately changed as long as it does not deviate from the gist of the present invention. On the other hand, not all of the components shown in the above embodiments are essential, and they can be appropriately selected.

1 Body 2 Side sill (components)
4 Floor panel 5 Fuel tank (important parts)
8 Canister 10 Bracket 11 1st member 12 2nd member 12A Front 2nd member 12B Rear 2nd member 14 1st main body 15 Panel mounting 21 Front 2nd main body 23 Front joint 25 Front body mounting 26 Front bending Department (vulnerable part)
28 Front side support part 29 Fastening hole 31 Rear side second main body part 32 Rear side support part 33 Rear side joint part 35 Rear side vehicle body mounting part 36 Rear side bending part (fragile part)
39 Fastening hole 39A Fastening hole (reference hole)
39B Fastening hole 41 1st cylinder 42 2nd cylinder 52 Upper curved part (bending inducing part)
62 Flat part (bending inducement part)
66 Vulnerable part

Claims (8)

It is a canister mounting structure for mounting a canister via a bracket at a position adjacent to the outside of the vehicle with respect to important parts mounted on the underside of the vehicle body.
The bracket
Between the important part and the canister, the important part and the canister extend along the lower surface of the vehicle body so as to be substantially orthogonal to each other, and the lower surface of the floor panel of the vehicle body. A first member having a pair of panel mounting parts to be mounted on the
At least one first having a second main body portion extending from an intermediate portion in the longitudinal direction of the first member toward the outside of the vehicle, a vehicle body mounting portion attached to a component member of the vehicle body, and a support portion for supporting the canister. It has two members and
A canister mounting structure characterized in that the bending rigidity of the first member with respect to an input from the extension direction of the second main body portion is higher than the bending rigidity of the second member. The canister mounting structure according to claim 1, wherein the first member has a main body portion having a closed cross-sectional shape that internally defines a hollow portion between a pair of the panel mounting portions. A claim characterized in that the second main body portion of the second member has a fragile portion curved in a downwardly convex direction when an axial load is received from the outside of the vehicle in an intermediate portion in the longitudinal direction. The canister mounting structure according to claim 1 or 2. The first member has a bending inducing portion in the middle portion in the longitudinal direction, which induces bending in an upwardly convex direction when a compressive load in the axial direction is applied.
At least one said second member includes two said said second members provided at different positions in the longitudinal direction of the first member so as to sandwich the bending inducing portion.
The canister mounting structure according to claim 3, wherein the canister is arranged over the support portion of the two second members. The canister mounting structure according to claim 4, wherein the support portion is provided so as to project from the corresponding second main body portion and is located between the two second main body portions. At least one of the second members is arranged so that the joint portion with respect to the first member and the vehicle body mounting portion are substantially the same height as each other.
The canister mounting structure according to any one of claims 3 to 5, wherein the canister is arranged above the second member. At least two fastening holes arranged on one of the first member side and the vehicle outer side along the longitudinal direction of the second member are formed in the support portion of the at least one second member, and the fastening is performed. The canister mounting structure according to any one of claims 3 to 6, wherein one of the holes is a reference hole for positioning. The canister mounting structure according to any one of claims 1 to 7, wherein the important component is a fuel tank, a traveling secondary battery, or a fuel cell.

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