JP7172923B2 - Vehicle seat mounting structure - Google Patents

Description

The present invention relates to a vehicle seat mounting structure.

Patent Document 1 discloses a vehicle seat mounting structure in which a seat cushion of a vehicle seat is supported on a pedestal installed on a floor panel. The pedestal disclosed in this document is fixed to the floor of the vehicle via legs and brackets extending from a mounting surface portion (pedestal portion) on which the seat cushion is placed. Thereby, the space generated between the mounting surface portion and the floor panel can be used as a housing portion for equipment mounted on the vehicle.

JP 2019-112015 A

However, in the technique described in Patent Document 1, when the vehicle seat swings, the load input from the vehicle seat to the pedestal is input to the floor panel via the above-described legs and brackets. For this reason, the load that is input concentrates on the fixed portion of the floor panel to which the legs and brackets are fixed, and the load on the joint portion between the floor panel and the vehicle lower structure increases in the vicinity of that portion. Therefore, there is room for improvement in distributing the load input from the vehicle seat to the floor panel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle seat mounting structure capable of dispersing the load applied from the vehicle seat to the floor panel.

According to claim 1, the vehicle seat mounting structure according to the present invention comprises a mounting surface portion on which a seat cushion of a vehicle seat can be mounted, and leg portions extending from the mounting surface portion and fixed to a floor panel. a pedestal comprising a base, a fixed portion that constitutes the floor of the vehicle on the upper side of the vehicle of a frame member disposed at the bottom of the vehicle, and to which the leg portion is fixed, and a first joint portion that is joined to the frame member; and a floor panel having a second joint portion joined to the frame member at a position farther from the fixed portion than the first joint portion; a body portion that reinforces a panel; an extension portion that extends from the body portion toward the second joint portion; and a third joint portion that is joined to the floor panel at the extension portion; a reinforcing panel arranged to cover a portion of the panel.

In the vehicle seat mounting structure according to the first aspect of the present invention, the seat cushion of the vehicle seat is supported by the pedestal. The pedestal includes a mounting surface on which the seat cushion can be placed, and legs extending from the mounting surface, and the legs are fixed to fixed portions of the floor panel. Also, the floor panel has a first joint portion and a second joint portion that are joined to a frame member arranged on the lower portion of the vehicle. The second joint portion is arranged at a position farther from the fixed portion than the first joint portion.

Here, part of the floor panel is covered with a reinforcing panel. The reinforcement panel has a body portion and an extension portion, and the body portion is secured to the fixed portion together with the leg portion to reinforce the floor panel. On the other hand, the extension portion is a portion extending from the main body portion toward the second joint portion of the floor panel, and has a third joint portion joined to the floor panel. Thereby, the rigidity of the floor panel is linearly increased by the reinforcement panel from the fixing portion to the second joint portion via the third joint portion. As a result, the load input to the fixed portion of the floor panel is transmitted not only to the first joint portion but also to the second joint portion, which is farther from the fixed portion than the first joint portion. In this way, the load input from the vehicle seat to the floor panel is distributed to the second joint portion, and is suppressed from being concentrated on the first joint portion.

As described above, the vehicle seat mounting structure according to claim 1 has the excellent effect of being able to disperse the load input from the vehicle seat to the floor panel.

1 is an exploded perspective view showing a partially exploded rear portion of a vehicle to which the vehicle seat mounting structure according to the first embodiment is applied; FIG. FIG. 2 is a plan view of the rear portion of the vehicle shown in FIG. 1 as viewed from above the vehicle; FIG. 2 is an enlarged perspective view showing a fixing portion of the floor panel shown in FIG. 1; FIG. 4 is an enlarged plan view of the fixing portion shown in FIG. 3 as viewed from above the vehicle; (A) is a schematic diagram for explaining the load input to the floor panel due to the swinging of the vehicle seat when traveling on rough roads, and (B) is a state cut along line 5B-5B in FIG. FIG. 4 is an enlarged cross-sectional view showing a cross-section of the floor panel, with a chain double-dashed line showing the position before the load is applied, and a solid line showing the position after the load is applied. FIG. 5 is a cross-sectional view corresponding to FIG. 5B showing a vehicle seat mounting structure as a comparative example;

A vehicle 10 to which the vehicle seat mounting structure according to the present embodiment is applied will be described below with reference to FIGS. 1 to 5. FIG. Note that the arrow FR appropriately shown in each figure indicates the front side of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow RH indicates the right side of the vehicle. In the following description, when front-rear, up-down, and left-right directions are used unless otherwise specified, front-rear in the longitudinal direction of the vehicle, up-down in the vertical direction of the vehicle, and left-right in the direction of travel are indicated.

(overall structure)
FIG. 1 shows a perspective view of an underbody 12 forming a rear portion 10A of a vehicle 10, and FIG. 2 shows a plan view of the underbody 12. As shown in FIG. As shown in these drawings, the vehicle 10 of this embodiment is configured as an electric vehicle or a hybrid vehicle. The vehicle 10 includes a drive engine (not shown) that receives electric power to drive a motor, and can run using the driving force of the motor. On the rear portion 10A of the vehicle 10, vehicle-mounted equipment 14 such as a battery and a converter that constitute a driving engine are mounted. Note that FIG. 2 omits the in-vehicle device 14 and the vehicle seat 100 for convenience of explanation.

Side members 16 as frame members arranged in the lower portion of the vehicle 10 are arranged on both sides in the vehicle width direction of the rear portion 10A of the vehicle 10, respectively, and extend in the vehicle front-rear direction. The pair of left and right side members 16 are connected using a plurality of cross members 30 extending in the vehicle width direction. As a result, a ladder-like framework is formed in the rear portion 10A of the vehicle 10 in plan view.

A floor panel 40 is joined to the upper side of the side member 16 and the cross member 30 to form the floors of the passenger compartment 11 and luggage compartment 13 of the vehicle 10 . A pedestal 60 for supporting the vehicle seat 100 is installed on the floor panel 40 at the boundary between the passenger compartment 11 and the luggage compartment 13 . Further, a housing portion 36 for housing the in-vehicle device 14 is provided between the pedestal 60 and the floor panel 40 . On the other hand, a reinforcing panel 80 is arranged on the fixing portion 50 of the floor panel 40 to which the pedestal 60 is fixed, and the rigidity of the floor panel 40 is increased using the reinforcing panel 80 . These members will be mainly described below.

(side member 16)
As shown in FIGS. 1 and 5B, the side member 16 is made of steel and extends in the vehicle front-rear direction. The side member 16 has a cross-sectional shape along the width direction of the vehicle that is formed in a substantially hat shape that is open toward the upper side of the vehicle. , side wall portions 20 erected toward the upper side of the vehicle from both ends of the bottom wall portion 18 in the vehicle width direction, and flange portions 22 (22A, 22B) extending substantially horizontally from the upper end portions of the pair of side wall portions 20. ), and

A front portion 16A, which constitutes a portion of the side member 16 on the front side of the vehicle, is joined to the inside of the pair of left and right rockers 24 and extends in the front-rear direction of the vehicle. A center portion 16B forming an intermediate portion of the side member 16 is curved toward the vehicle upper side and the vehicle inner side toward the vehicle rear side. A wheel house 26 in which the rear wheels (reference numerals omitted) of the vehicle 10 are accommodated is provided outside the center portion 16B in the vehicle width direction. A rear portion 16C, which constitutes a portion of the side member 16 on the rear side of the vehicle, extends in the vehicle front-rear direction while being offset toward the inside of the vehicle relative to the front portion 16A and the center portion 16B.

(Cross member 30)
As shown in FIG. 2 , the cross member 30 includes a first cross member 32 and a second cross member 34 arranged on the vehicle rear side of the first cross member 32 . The first cross member 32 and the second cross member 34 are made of a steel plate having a hat-shaped cross section and extend in the width direction of the vehicle. The first cross member 32 arranged on the front side of the vehicle is arranged in a posture in which the hat-shaped cross section projects toward the upper side of the vehicle. The first cross member 32 connects the front end portions of the pair of left and right center portions 16B in the vehicle width direction. On the other hand, the second cross member 34 is arranged behind the first cross member 32 with a predetermined space therebetween. The second cross member 34 is disposed with a hat-shaped cross section projecting toward the lower side of the vehicle, and connects an intermediate portion of a pair of left and right center portions in the vehicle width direction. As a result, the center portion 16B of the side member 16, the first cross member 32, and the second cross member 34 form a frame-shaped skeleton portion that is rectangular in plan view. Further, in a plan view, a housing portion 36 for the in-vehicle device 14 is formed inside the frame-shaped skeleton portion. As a result, the center portion 16B of the side member 16, the first cross member 32, and the second cross member 34 improve the rigidity around the housing portion 36, thereby protecting the in-vehicle device 14 from the impact of a vehicle collision or the like. It is said that

(Floor panel 40)
The floor panel 40 is composed of a plurality of plates made of steel plates, and includes a front floor panel 42 , a center floor panel 44 , a rear floor panel 46 and side panels 48 . Inside the pair of left and right side members 16, a front floor panel 42, a center floor panel 44, and a rear floor panel 46 are laid in this order from the vehicle front side toward the rear side. Furthermore, side panels 48 are laid on both sides of the center floor panel 44 in the vehicle width direction so as to be bilaterally symmetrical in a plan view.

A front floor panel 42, a part of which is shown in FIG. 1, forms the floor of the passenger compartment 11 from the floor of the front seat (not shown) of the vehicle 10. As shown in FIG. A center floor panel 44 arranged on the rear side of the front floor panel 42 serves as a boundary portion between the passenger compartment 11 and the luggage compartment 13 of the vehicle, and is inclined upward toward the rear side of the vehicle in a side view. . A pedestal 60 for supporting the vehicle seat 100 is installed on the vehicle upper side of the center floor panel 44 . A rear floor panel 46 arranged on the rear side of the center floor panel 44 extends from the rear end portion of the center floor panel 44 to the rear side of the vehicle and constitutes the floor of the luggage compartment 13 .

On the other hand, the side panels 48 are arranged on both sides of the center floor panel 44 in the vehicle width direction. The side panel 48 is elongated in the vehicle front-rear direction, and its outer shape substantially matches the outer shape of the center portion 16B of the side member 16 in plan view. The side panel 48 is arranged to cover the center portion 16B from above the vehicle. The side panel 48 corresponds to the "floor panel" in the present invention.

A fixing portion 50 for fixing a side leg portion 64B included in the leg portion 64 of the pedestal 60, which will be described later, is provided in the central portion of the side panel 48. As shown in FIG. The fixed portion 50 is configured as a concave portion recessed toward the vehicle lower side, and the side leg portion 64B of the base 60 can be placed inside. The fixing portion 50 is formed with a through hole 52 passing through the side panel 48 in the plate thickness direction, and a fixing bolt 54 for fixing the side leg portion 64B to the side panel 48 is inserted through the through hole 52. It is possible.

(pedestal 60)
Next, the pedestal 60 that supports the vehicle seat 100 will be described.

As shown in FIGS. 1 and 2 , the pedestal 60 is provided above the housing portion 36 that houses the vehicle-mounted device 14 . The pedestal 60 extends in the vehicle width direction and the vehicle front-rear direction and is formed in a table shape by a mounting surface portion 62 formed in a top plate shape and leg portions 64 extending from the mounting surface portion 62 . ing.

The mounting surface portion 62 includes a front frame 62A, a rear frame 62B, and a central frame 62C that form a skeleton. The front frame 62A constitutes an edge portion of the mounting surface portion 62 on the front side of the vehicle, and is formed using a pipe material. The front frame 62A is formed by bending a pipe material so as to have a substantially U shape that is open toward the vehicle rear side in a plan view. On the other hand, the rear frame 62B constitutes the edge of the mounting surface 62 on the vehicle rear side. The rear frame 62B is formed of a plate having a thickness direction in the vehicle vertical direction and a longitudinal direction in the vehicle width direction, and connects the open end of the front frame 62A in the vehicle width direction. Further, a center frame 62C is arranged to connect the vehicle width direction centers of the front frame 62A and the rear frame 62B along the front-rear direction. The center frame 62C is formed using a plate body whose thickness direction is the vehicle up-down direction and whose longitudinal direction is the vehicle front-rear direction.

Furthermore, a top plate panel 62D is arranged inside the annular frame formed by the front frame 62A and the rear frame 62B. The top plate panel 62D extends in the vehicle width direction and the vehicle front-rear direction with the vehicle up-down direction as the plate thickness direction. The top plate panel 62D is joined at its rear end to the rear frame 62B by a method such as welding, and is supported downward by a plurality of support brackets (reference numerals omitted) bridged between the front frame 62A and the rear frame 62B. supported by. A seat cushion 102 that constitutes a seating surface for an occupant seated on the vehicle seat 100 can be placed on the top plate panel 62D. Also, the seat cushion 102 can be fixed to the mounting surface portion 62 using fixing means (not shown).

The leg portion 64 includes a front leg portion 64A that extends from the vehicle front side edge of the mounting surface portion 62, a side leg portion 64B that extends from the vehicle rear side edge of the mounting surface portion 62, and a rear leg portion. and legs 64C. The front leg portions 64A extend downward from the front frame 62A, and are provided in plurality (four in this embodiment) along the width direction of the vehicle. The lower end portion of the front leg portion 64A is arranged on the front side of the first cross member 32, and is mechanically joined to the side surface of the first cross member 32 together with the front floor panel 42 using fasteners such as bolts (not shown). It is

The side leg portions 64B are provided at the rear end portion and both vehicle width direction end portions of the mounting surface portion 62, respectively, and extend outward in the vehicle width direction from both longitudinal end portions of the rear frame 62B. A fixing bolt 54 passes through the side leg portion 64B, and the shaft portion of the fixing bolt 54 passes through the through-hole 52 of the side panel 48 and a reinforcing panel 80 which will be described later. A nut (not shown) arranged on the lower side of the reinforcing panel 80 is screwed onto the tip of the shaft portion of the fixing bolt 54 . Thereby, the side leg portion 64B is fixed to the side panel 48 in a state of being fastened together with the reinforcing panel 80 .

The rear leg portion 64C is provided at the rear end portion of the mounting surface portion 62 and at the center portion in the vehicle width direction, and extends from the rear end portion of the center frame 62C to the vehicle rear side. The rear leg portion 64C is mechanically joined to the rear portion of the center floor panel 44 using fasteners such as bolts (not shown).

(Main part of the present invention)
Next, the reinforcing structure of the fixing portion 50 to which the side leg portion 64B of the base 60 is fixed, which is the main part of the present invention, will be described. Before explaining this reinforcing structure, first, the joint structure between the side panel 48 provided with the fixing portion 50 and the side member 16 will be explained. The side panel 48 is joined to the center portion 16B of the side member 16 by spot welding.

As shown in FIG. 2, the side panel 48 includes a front edge portion 48A on the front side of the vehicle, a rear edge portion 48B on the rear side of the vehicle, an outer edge portion 48C on the outer side in the vehicle width direction, and an inner edge portion 48D on the inner side in the vehicle width direction. It has The front edge portion 48A on the front side of the vehicle is joined to the rear end portion of the front floor panel 42 by spot welding or the like. A rear edge portion 48B on the vehicle rear side is joined to the front end portion of the rear floor panel 46 by spot welding.

As shown in FIGS. 3 and 4, the outer edge portion 48C of the side panel 48 on the vehicle width direction outer side is joined to the flange portion 22A provided on the vehicle outer side of the center portion 16B by spot welding. As a result, a plurality of joints (welding points) 66 that are joined to the flange portion 22A are arranged on the outer edge portion 48C at predetermined intervals along the extending direction of the outer edge portion 48C.

Further, the inner edge portion 48D of the side panel 48 on the inner side in the vehicle width direction is joined by spot welding to the flange portion 22B provided on the inner side of the vehicle of the center portion 16B. Further, the outer edge portion of the center floor panel 44 in the vehicle width direction is also joined to the flange portion 22B. In this embodiment, the outer edge portion of the center floor panel 44 in the vehicle width direction and the inner edge portion 48D of the side panel 48 are superimposed on the flange portion 22B in this order. As a result, a plurality of joints (welding points) 68 joined to the flange portion 22B and the center floor panel 44 are arranged on the inner edge portion 48D at predetermined intervals along the extending direction of the inner edge portion 48D. there is

By the way, a non-joint region X (see region X shown in FIGS. 3 and 4) where the side panel 48 is not joined to the flange portion 22B is formed in an intermediate portion in the extending direction of the inner edge portion 48D of the side panel 48. . The non-joint region X is a region where one end of the second cross member 34 extending in the vehicle width direction is joined to the flange portion 22B by a plurality of joint portions 70 . Note that the joint portion 70 is a spot welding point. In this non-bonded region X, the total plate thickness of the overlapping members is increased by the plate thickness of the second cross member 34 compared to other portions of the inner edge portion 48D. As a result, in the welding process of the inner edge portion 48D in the manufacturing line, the welding point (joint portion 68) similar to the other portion of the inner edge portion 48D cannot be provided in the non-joining region X, so the side panel 48 is attached to the flange portion 22B. is a non-bonded region.

By the way, according to the joint structure between the side panel 48 and the side member 16 configured as described above, the joint strength of the side panel 48 is weaker in the non-joint region X than in other regions. Therefore, when a load is applied to the side panel 48, the stress concentrates on the area adjacent to the non-bonded area X in the inner edge portion 48D. Here, in the vehicle seat mounting structure of this embodiment, a load is input to the side panel 48 from the side leg portion 64B of the pedestal 60 fixed to the fixing portion 50 .

As shown in FIG. 5A, for example, when the vehicle 10 travels on a rough road 200 having a rough road surface, the inertial force causes the vehicle seat 100 to swing in the vehicle front-rear direction. This rocking motion of the vehicle seat 100 is transmitted to the base 60 to which the seat cushion 102 is fixed, and is transmitted to the side panel 48 via the side leg portion 64B of the base 60 . Specifically, when the vehicle seat 100 attempts to move toward the vehicle rear side (see arrow F1) due to inertial force, a vehicle downward load (see arrow F2) is input from the side leg portions 64B to the side panel 48 . be. Further, when the vehicle seat 100 attempts to move toward the front side of the vehicle due to inertial force, a tensile load in the vehicle upward direction is input to the side panel 48 from the side leg portions 64B. In particular, when the side panel 48 is displaced (sinks) downward due to the input of a load in the downward direction of the vehicle, the mounting surface portion 62 of the pedestal 60 is displaced downward in the vehicle and the in-vehicle device 14 in the housing portion 36 is displaced downward. There is a danger of getting closer. For this reason, in this embodiment, in order to suppress such displacement of the side panel 48, the rigidity of the side panel 48 is improved by using the reinforcing panel 80. As shown in FIG. The details of the reinforcing panel 80 will be described below with reference to FIGS. 3 and 4. FIG.

As shown in FIGS. 3 and 4, the reinforcing panel 80 is arranged to cover the periphery of the fixed portion 50 of the side panel 48 from the vehicle lower side.

The reinforcing panel 80 is made of steel, and has a body portion 80A covering the fixed portion 50 of the side panel 48 and an extension portion 80B extending from the body portion 80A.

The body portion 80A has a substantially circular shape in plan view. A concave portion 82 is formed in the main body portion 80A along the shape of the fixed portion 50 of the side panel 48 so as to be recessed toward the lower side of the vehicle. A through hole (reference numeral omitted) is formed in the bottom surface of the recess so as to be coaxial with the through hole 52 of the side panel 48 and through which the shaft portion of the fixing bolt 54 passes. Further, the main body portion 80A is joined to the side panel 48 at the periphery of the recess 82 by spot welding, and along the periphery of the recess 82, a plurality of (three in this embodiment) joints (striking points) 86 are formed. are placed. Thereby, the body portion 80A is joined so as to cover the fixed portion 50 of the side panel 48, and the rigidity around the fixed portion 50 is increased.

On the other hand, the extension portion 80B is formed to extend from the peripheral edge portion of the recessed portion 82 formed in the main body portion 80A toward the inner edge portion 48D of the side panel 48 on the inner side in the vehicle width direction. More specifically, the extending direction of the extension portion 80B will be described in more detail. It extends toward the joint 68 (hereinafter referred to as the second joint 92) adjacent to the joint 68 (hereinafter referred to as the "first joint 90") closest to the joint region X. That is, the second joint portion 92 is the second closest joint portion 68 from the non-joint region X among the joint portions 68 arranged in the region Y adjacent to the non-joint region X on the vehicle front side.

note that. Region Y is a region closer to the center of gravity of the pedestal than the region on the opposite side of region Y and adjacent to non-bonded region X, and a load is input to side panel 48 from side leg portion 64B of pedestal 60. This is a region where a higher stress is generated compared to the region on the other side when the other side is applied. In addition, the first joint portion 90 is arranged at a position closer to the fixed portion 50 than the second joint portion 92 , and the first joint portion 90 is subjected to a higher stress than the second joint portion 92 . occurs.

A third joint (spot) 94 joined to the side panel 48 by spot welding is arranged at the tip of the extension 80B. Accordingly, the fixed portion 50, the third joint portion 94, and the second joint portion 92 of the side panel 48 are arranged substantially linearly along the extending direction of the extension portion 80B. As a result, the rigidity of the side panel 48 increases linearly from the fixed portion 50 toward the second joint portion 92 .

As described above, when a load is input to the side panel 48 from the side leg portion 64B of the base 60, the stress generated at the inner edge portion 48D of the side panel 48 weakens the joint strength with the side member 16 (center portion 16B). It concentrates on the non-bonding region X and the region Y adjacent to each other.

Here, as in the comparative example shown in FIG. 6, when the side panel 106 is reinforced using a reinforcement panel (not shown) that does not have the extension portion 80B similar to the present embodiment, the load in the vehicle downward direction is input. Then, stress is concentrated on the first joint portion 90 . As a result, the portion of the side panel 106 on the vehicle width direction outer side of the first joint portion 90 is bent downward with respect to the vehicle from the two-dot chain line position shown in FIG. 6 to the solid line position.

On the other hand, as shown in FIG. 5B, in this embodiment in which the reinforcement panel 80 is provided with the extension portion 80B, the rigidity of the side panel 48 is linear from the fixed portion 50 toward the second joint portion 92. is raised to Therefore, a transmission path is formed for transmitting the load input to the side panel 48 to the second joint portion 92 . Thereby, the load input to the side panel 48 is distributed to the first joint portion 90 and the second joint portion 92 . As shown by the solid line in FIG. 5(B), deformation of the side panel 48 toward the vehicle lower side is reduced as compared with the configuration of the comparative example shown in FIG.

(Action and effect)
Next, the operation and effects of this embodiment will be described.

In this embodiment, the seat cushion 102 of the vehicle seat 100 is supported by the pedestal 60 . The pedestal 60 includes a mounting surface portion 62 on which the seat cushion 102 can be placed, and side leg portions 64B constituting leg portions 64 extending from the mounting surface portion 62. The side leg portions 64B is fixed to the fixed portion 50 of the side panel 48 . The side panel 48 also has a first joint portion 90 and a second joint portion 92 joined to the side member 16 arranged at the lower portion of the vehicle 10 . The second joint portion 92 is arranged at a position farther from the fixed portion 50 than the first joint portion 90 .

A portion of the side panel 48 is covered with a reinforcing panel 80 here. The reinforcement panel 80 includes a body portion 80A and an extension portion 80B, and the body portion 80A is fixed to the fixed portion 50 together with the side leg portions 64B to reinforce the side panel 48. As shown in FIG. On the other hand, the extension portion 80B extends from the main body portion 80A toward the second joint portion 92 of the side panel 48 and has a third joint portion 94 joined to the side panel 48 . Thereby, the rigidity of the side panel 48 is linearly increased by the reinforcing panel 108 from the fixed portion 50 to the second joint portion 92 via the third joint portion 94 . As a result, the load input to the fixed portion 50 of the side panel 48 is transmitted not only to the first joint portion 90 but also to the second joint portion 92 which is farther from the fixed portion 50 than the first joint portion 90. . In this way, the load input from the vehicle seat 100 to the side panel 48 can be dispersed to the second joint portion 92 and can be suppressed from being concentrated on the first joint portion 90 . The mounting strength of the can be improved.

Moreover, since the mounting strength of the vehicle seat 100 can be improved without increasing the plate thickness of the side panel 48 as a whole, increases in material cost and mass can be suppressed.

In addition, the side panel 48 of the present embodiment has a non-bonded region X that is not bonded to the side member 16, and the first joint portion 90 is arranged adjacent to the non-bonded region X. As shown in FIG. As a result, even if a non-bonded region X is formed in which the bonding strength of the side panel 48 is weak due to the lower structure of the vehicle 10, input is made from a position adjacent to the non-bonded region X, that is, the side leg portion 64B. It is possible to disperse the stress acting on the first joint portion 90 arranged at a position where a high stress is generated by the load applied to the second joint portion 92 . The durability of the attachment portion of the vehicle seat 100 can be enhanced, and the degree of freedom in layout of the lower portion of the vehicle can be enhanced.

Further, in this embodiment, the first joint portion 90 and the second joint portion 92 are arranged in a region closer to the center of gravity of the base 60 than the non-joint region X of the side panel 48 . As a result, the load input to the side panel 48 can be efficiently dispersed in the range where high stress is generated, so the durability of the mounting portion of the vehicle seat 100 can be efficiently improved.

Further, in this embodiment, the non-joint area X of the side panel 48 is an area covering the joint between the side member and the cross member. As a result, both the mounting strength of the vehicle seat 100 and the rigidity of the frame structure of the vehicle 10 can be improved.
[supplementary explanation]

In the above embodiment, the reinforcing panel 80 is arranged on the vehicle lower side of the side panel 48, but the present invention is not limited to this, and the reinforcing panel may be arranged on the vehicle upper side of the side panel. .

Further, in the above-described embodiment, the second joint portion 92 is configured as the second closest joint portion 68 among the joint portions 68 arranged in the region Y adjacent to the non-joint region X on the front side of the vehicle. The present invention is not limited to this, and the joint portion 68 closest to the third or fourth may be used as the second joint portion.

Further, in the above embodiment, the side leg portion 64B of the base 60 is fixed to the side panel 48 joined to the side member 16, but the present invention is not limited to this. For example, the leg portion of the pedestal may be fixed to a floor panel such as a cross member that is joined to another frame member arranged in the lower portion of the vehicle, and the vehicle seat mounting structure of the present invention may be applied to the floor panel. .

16 side member (skeletal member)
48 side panel (floor panel)
60 pedestal 62 mounting surface portion 64B side leg portion (leg portion)
80 Reinforcing panel 80A Main body 80B Extension 90 First joint 92 Second joint 94 Third joint 100 Vehicle seat 102 Seat cushion

Claims (1)

a pedestal including a mounting surface on which a seat cushion of a vehicle seat can be placed; and legs extending from the mounting surface and fixed to a floor panel;
a fixed portion to which the leg portion is fixed, a first joint portion joined to the frame member; a floor panel having a second joint portion joined to the frame member at a position farther from the fixed portion than the joint portion;
a main body portion fixed together with the leg portion at the fixed portion to reinforce the floor panel; an extension portion extending from the main body portion toward the second joint portion; a reinforcing panel positioned to cover a portion of the floor panel;
A vehicle seat mounting structure comprising:

Images