JP2021037913A - Vehicle seat fitting structure - Google Patents

Abstract

To provide a vehicle seat fitting structure capable of scattering a load input into a floor panel from a vehicle seat.SOLUTION: A side panel 48 of a vehicle 10 includes a stationary part 50 for fixing a lateral leg part 64B of a base 60. The side panel 48 has a first joint part 90 joined to a side member 16 and a second joint part 92 joined to the side member 16 at a position a longer distance away from the stationary part 50 than the first joint part 90. A part of the side panel 48 is covered with a reinforcement panel 80 fixed onto the stationary part 50 together with the lateral leg part 64B. The reinforcement panel 80 has an extension part 80B extended toward the second joint part 92 from the stationary part 50, and the extension part 80B has a third joint part 94 arranged to be joined to the side panel 48.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle seat mounting structure.

Patent Document 1 discloses a vehicle seat mounting structure in which a vehicle seat cushion 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 (pedestal) on which the seat cushion is placed. As a result, the space created between the mounting surface portion and the floor panel can be used as an accommodating portion for equipment mounted on the vehicle.

Japanese Unexamined Patent Publication No. 2019-112015

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-mentioned legs and brackets. Therefore, the load input to the fixed portion of the floor panel to which the legs and brackets are fixed is concentrated, and in the vicinity thereof, the load on the joint portion between the floor panel and the vehicle lower structure becomes large. Therefore, there is room for improvement in that the load input from the vehicle seat to the floor panel is dispersed.

In consideration of the above facts, an object of the present invention is to provide a vehicle seat mounting structure capable of distributing a load input from a vehicle seat to a floor panel.

The vehicle seat mounting structure according to the first aspect of the present invention includes a mounting surface portion on which the seat cushion of the vehicle seat can be mounted, and a leg portion extending from the previously described mounting surface portion and fixed to the floor panel. A pedestal provided with a pedestal, a fixing portion for which the floor portion of the vehicle is formed on the vehicle upper side of a skeleton member arranged at the lower portion of the vehicle and the legs are fixed, and a first joint portion joined to the skeleton member. A floor panel having a second joint portion joined to the skeleton member at a position farther from the fixing portion than the first joint portion, and the floor fixed together with the leg portion at the fixing portion. The floor has a main body portion for reinforcing the panel, an extension portion extended from the main body portion toward the second joint portion, and a third joint portion joined to the floor panel at the extension portion. It is provided with a reinforcing panel arranged so as to cover a part 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. This pedestal includes a mounting surface portion on which a seat cushion can be mounted and a leg portion extending from the mounting surface portion, and the leg portion is fixed to a fixed portion of the floor panel. Further, the floor panel has a first joint portion and a second joint portion joined to a skeleton member arranged at the lower part of the vehicle. The second joint portion is arranged at a position farther from the fixed portion than the first joint portion.

Here, a part of the floor panel is covered with a reinforcing panel. The reinforcing panel includes a main body portion and an extension portion, and the main body portion is fixed to the fixed portion together with the leg portions to reinforce the floor panel. On the other hand, the extension portion is a portion extended 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. As a result, the rigidity of the floor panel is linearly increased by the reinforcing panel from the fixed 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 to the second joint portion, which is farther from the fixed portion than the first joint portion, in addition to the first joint portion. In this way, the load input from the vehicle seat to the floor panel is dispersed to the second joint portion, and concentration on the first joint portion is suppressed.

As described above, the vehicle seat mounting structure according to claim 1 has an excellent effect that the load input from the vehicle seat to the floor panel can be dispersed.

It is an exploded perspective view which shows the rear part of the vehicle to which the vehicle seat mounting structure which concerns on 1st Embodiment is applied partially disassembled. It is a top view which looked at the rear part of the vehicle shown in FIG. 1 from the upper side of the vehicle. It is an enlarged perspective view which shows the fixed part of the floor panel shown in FIG. FIG. 3 is an enlarged plan view of the fixed portion shown in FIG. 3 as viewed from above the vehicle. (A) is a schematic view explaining the load input to the floor panel from the swing of the vehicle seat when traveling on a rough road, and (B) is a state of being cut along the 5B-5B line of FIG. It is a cross-sectional view of a floor panel, and is an enlarged cross-sectional view showing a position before a load is input by a chain double-dashed line and a position after the load is input by a solid line. It is sectional drawing corresponding to FIG. 5 (B) which shows the vehicle seat mounting structure as a comparative example.

Hereinafter, the vehicle 10 to which the vehicle seat mounting structure according to the present embodiment is applied will be described with reference to FIGS. 1 to 5. 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 the front-rear, up-down, and left-right directions are used without special mention, the front-rear direction of the vehicle front-rear direction, the up-down direction of the vehicle up-down direction, and the left-right direction when facing the traveling direction shall be indicated.

(overall structure)
FIG. 1 shows a perspective view of the underbody 12 constituting the rear portion 10A of the vehicle 10, and FIG. 2 shows the underbody 12 in a plan view. As shown in these figures, the vehicle 10 of the present embodiment is configured as an electric vehicle or a hybrid vehicle. The vehicle 10 is provided with a drive engine (not shown) that drives a motor by receiving an electric power supply, and is capable of traveling by using the driving force of the motor. An in-vehicle device 14 such as a battery or a converter constituting a drive engine is mounted on the rear portion 10A of the vehicle 10. In FIG. 2, for convenience of explanation, the in-vehicle device 14 and the vehicle seat 100 are omitted.

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

Further, on the upper side of the side member 16 and the cross member 30, a floor panel 40 constituting the floor portion of the passenger compartment 11 and the luggage compartment 13 of the vehicle 10 is joined. Further, at the boundary between the passenger compartment 11 and the luggage compartment 13, a pedestal 60 that supports the vehicle seat 100 is installed on the floor panel 40. Further, a storage unit 36 for accommodating 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 by using the reinforcing panel 80. Hereinafter, these members will be mainly described.

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

The front portion 16A forming the 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. The center portion 16B forming the intermediate portion of the side member 16 is curved toward the upper side of the vehicle and the inner side of the vehicle toward the rear side of the vehicle. A wheel house 26 in which the rear wheels (reference numerals are omitted) of the vehicle 10 are housed is provided outside the center portion 16B in the vehicle width direction. Further, the rear portion 16C constituting the portion of the side member 16 on the rear side of the vehicle is offset to the inside of the vehicle from the front portion 16A and the center portion 16B and extends in the front-rear direction of the vehicle.

(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 rear side of the vehicle with respect to the first cross member 32. The first cross member 32 and the second cross member 34 are made of a steel plate formed in a hat-shaped cross section, and extend in the vehicle width direction. 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 is convex 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 on the rear side of the first cross member 32 at a predetermined interval. The second cross member 34 is arranged in a posture in which the hat-shaped cross section is convex downward on the vehicle side, and connects the intermediate portions of the 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 having a rectangular shape in a plan view. Further, in a plan view, the accommodating portion 36 of the in-vehicle device 14 is formed inside the frame-shaped skeleton portion. As a result, the rigidity around the accommodating portion 36 is improved by the center portion 16B, the first cross member 32, and the second cross member 34 of the side member 16, and the in-vehicle device 14 is protected from the impact at the time of a vehicle collision or the like. It is said that.

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

The front floor panel 42, which is partially shown in FIG. 1, constitutes the floor portion of the passenger cabin 11 from the floor portion of the front seat (not shown) of the vehicle 10. Further, the center floor panel 44 arranged on the rear side of the front floor panel 42 is 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 that supports the vehicle seat 100 is installed on the vehicle upper side of the center floor panel 44. Further, the 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 portion 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 formed to be long in the front-rear direction of the vehicle, and its outer shape substantially matches the outer shape of the center portion 16B of the side member 16 in a plan view. The side panel 48 is arranged so as to cover the center portion 16B from the upper side of the vehicle. The side panel 48 corresponds to the "floor panel" in the present invention.

At the center of the side panel 48, a fixing portion 50 for fixing the side leg portion 64B included in the leg portion 64 of the pedestal 60, which will be described later, is provided. The fixing portion 50 is configured as a recessed portion on the lower side of the vehicle, and the side leg portion 64B of the pedestal 60 can be placed inside. A through hole 52 that penetrates the side panel 48 in the plate thickness direction is formed in the fixing portion 50, and a fixing bolt 54 that fixes the side leg portion 64B to the side panel 48 is inserted into 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 on the upper side of the accommodating portion 36 accommodating the in-vehicle 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 a leg portion 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 by using a pipe material. The front frame 62A is formed by bending a pipe material so as to form a substantially U shape open to the rear side of the vehicle in a plan view. On the other hand, the rear frame 62B constitutes an edge portion of the mounting surface portion 62 on the rear side of the vehicle. After this, the rear frame 62B is formed by using a plate body having the vehicle vertical direction as the thickness direction and the vehicle width direction as the longitudinal direction, and connects the open ends of the front frame 62A in the vehicle width direction. Further, the central frame 62C is arranged so as to connect the center of the front frame 62A and the rear frame 62B in the vehicle width direction along the front-rear direction. The central frame 62C is formed by using a plate body having the vertical direction of the vehicle as the thickness direction and the front-rear direction of the vehicle as the longitudinal direction.

Further, the top plate panel 62D is arranged inside the annular skeleton formed by the front frame 62A and the rear frame 62B. The top plate panel 62D has a plate thickness direction in the vertical direction of the vehicle, and extends in the vehicle width direction and the vehicle front-rear direction. Further, the top plate panel 62D has a rear end portion joined to the rear frame 62B by a method such as welding, and is on the lower side by a plurality of support brackets (reference numerals omitted) bridged between the front frame 62A and the rear frame 62B. Is supported by. On the top plate panel 62D, a seat cushion 102 constituting a seating surface of an occupant seated on the vehicle seat 100 can be placed. Further, the seat cushion 102 can be fixed to the mounting surface portion 62 by using a fixing means (not shown).

The legs 64 include a front leg 64A extending from the front edge of the mounting surface 62 on the vehicle front side, and side legs 64B and rear extending from the rear edge of the mounting surface 62 on the vehicle rear side. Includes legs 64C and. The front leg portions 64A extend downward from the front frame 62A, and a plurality of front leg portions 64A (four in the present embodiment) are provided along the vehicle width direction. The lower end 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 by using a fixture such as a bolt (not shown). Has been done.

The side leg portions 64B are provided at the rear ends of the mounting surface portion 62 and at both ends in the vehicle width direction, and extend outward from both ends in the longitudinal direction of the rear frame 62B in the vehicle width direction. A fixing bolt 54 penetrates the side leg portion 64B, and the shaft portion of the fixing bolt 54 penetrates the through hole 52 of the side panel 48 and the reinforcing panel 80 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. As a result, 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 central portion in the vehicle width direction, and extends from the rear end portion of the central frame 62C to the rear side of the vehicle. The rear leg portion 64C is mechanically joined to the rear portion of the center floor panel 44 by using a fixture such as a bolt (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 pedestal 60 is fixed, which is the main part of the present invention, will be described. In explaining this reinforcing structure, first, a joint structure between the side panel 48 provided with the fixing portion 50 and the side member 16 will be described. The side panel 48 is joined to the center portion 16B of the side member 16 by a spot welding method.

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 a method such as spot welding. Further, the rear edge portion 48B on the rear side of the vehicle is joined to the front end portion of the rear floor panel 46 by a spot welding method.

As shown in FIGS. 3 and 4, the outer edge portion 48C of the side panel 48 on the outer side in the vehicle width direction is joined to the flange portion 22A provided on the outer side of the vehicle of the center portion 16B by a spot welding method. As a result, a plurality of joint portions (striking points) 66 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 on the inner side of the side panel 48 in the vehicle width direction is joined to the flange portion 22B provided on the inner side of the vehicle of the center portion 16B by a spot welding method. Further, the flange portion 22B is also joined to the outer edge portion of the center floor panel 44 in the vehicle width direction described above. In the present 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 superposed on the flange portion 22B in this order. As a result, a plurality of joints (striking 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-joining region X (see the region X shown in FIGS. 3 and 4) in which the side panel 48 is not joined to the flange portion 22B is formed in the intermediate portion of the inner edge portion 48D of the side panel 48 in the extending direction. .. This non-joining region X is a region in which 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 joining portions 70. The joint portion 70 is a spot welding spot. In this non-joining region X, the total plate thickness of the plurality of overlapping members is increased by the plate thickness of the second cross member 34 as compared with other portions in the inner edge portion 48D. As a result, in the welding process of the inner edge portion 48D in the production line, it is not possible to provide the same hitting points (joining portion 68) as other portions in the inner edge portion 48D in the non-joining region X, so that the side panel 48 is provided on the flange portion 22B. Is the area where is not joined.

By the way, according to the bonding structure of the side panel 48 and the side member 16 having the above configuration, the bonding strength of the side panel 48 is weaker in the non-bonding region X than in other regions. Therefore, when a load is input to the side panel 48, the stress is concentrated on the region adjacent to the non-bonded region X in the inner edge portion 48D of the side panel 48. Here, in the vehicle seat mounting structure of the present 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 severely uneven road surfaces, the vehicle seat 100 is swung in the vehicle front-rear direction by inertial force. The swing of the vehicle seat 100 is transmitted to the pedestal 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 pedestal 60. Specifically, when the vehicle seat 100 attempts to move to the rear side of the vehicle (see arrow F1) due to inertial force, a load in the downward direction of the vehicle (see arrow F2) is input from the side legs 64B to the side panel 48. To. Further, when the vehicle seat 100 tries to move to the front side of the vehicle due to inertial force, a tensile load in the upward direction of the vehicle is input from the side leg portion 64B to the side panel 48. 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 to the vehicle-mounted device 14 in the accommodating portion 36. There is a risk of approaching. Therefore, in the present embodiment, in order to suppress such displacement of the side panel 48, the reinforcing panel 80 is used to improve the rigidity of the side panel 48. Hereinafter, the details of the reinforcing panel 80 will be described with reference to FIGS. 3 and 4.

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

The reinforcing panel 80 is made of a steel plate, and has a main body portion 80A that covers the fixed portion 50 of the side panel 48 and an extension portion 80B that is extended from the main body portion 80A.

The main body 80A has a substantially circular shape in a plan view. Further, the main body portion 80A is formed with a recess 82 recessed on the lower side of the vehicle along the shape of the fixing portion 50 of the side panel 48. A through hole (reference numeral omitted) is formed on the bottom surface of the recess so as to be coaxially arranged with the through hole 52 of the side panel 48 and through which the shaft portion of the fixing bolt 54 penetrates. Further, in the main body 80A, the peripheral edge portion of the concave portion 82 is joined to the side panel 48 by a spot welding method, and a plurality of (three in the present embodiment) joint portions (dots) 86 are joined along the peripheral edge of the concave portion 82. Is placed. As a result, the main body portion 80A is joined so as to cover the fixing portion 50 of the side panel 48, and the rigidity around the fixing portion 50 is increased.

On the other hand, the extension portion 80B is formed so as to extend from the peripheral edge portion of the recess 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 more specifically. The extension portion 80B is not included in the joint portions 68 arranged in the region Y adjacent to the front side of the vehicle with respect to the non-joint region X of the inner edge portion 48D. It extends toward the joint portion 68 (hereinafter, the second joint portion 92) arranged adjacent to the joint portion 68 (hereinafter, referred to as “first joint portion 90”) closest to the joint region X. That is, the second joint portion 92 is a joint portion 68 that is the second closest to the non-joint region X among the joint portions 68 arranged in the region Y adjacent to the vehicle front side with respect to the non-joint region X.

In addition. The region Y is a region opposite to the region Y and closer to the center of gravity of the pedestal than the region on the other side adjacent to the non-joined region X, and a load is input from the side leg portion 64B of the pedestal 60 to the side panel 48. This is the site where higher stress is generated compared to the region on the other side. Further, 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 has a higher stress than the second joint portion 92. Occurs.

Further, a third joint portion (striking point) 94 joined to the side panel 48 by a spot welding method is arranged at the tip end portion of the extension portion 80B. As a result, the fixing 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 is linearly increased from the fixed portion 50 toward the second joint portion 92.

As described above, when a load is input from the side leg portion 64B of the pedestal 60 to the side panel 48, 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). Concentrate on the region Y adjacent to the non-junction region X.

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

On the other hand, as shown in FIG. 5B, in the present embodiment in which the reinforcing 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. Has been enhanced. Therefore, a transmission path for transmitting the load input to the side panel 48 to the second joint portion 92 is formed. As a result, the load input to the side panel 48 is distributed to the first joint portion 90 and the second joint portion 92. Then, as shown by the solid line in FIG. 5B, the deformation of the side panel 48 toward the lower side of the vehicle is reduced as compared with the configuration of the comparative example shown in FIG.

(Action and effect)
Next, the operation and effect 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 mounted, and side leg portions 64B constituting the leg portions 64 extending from the mounting surface portion 62, and the side leg portions 64B. Is fixed to the fixing portion 50 of the side panel 48. Further, the side panel 48 has a first joint portion 90 and a second joint portion 92 joined to the side member 16 arranged at the lower part 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.

Here, a part of the side panel 48 is covered with the reinforcing panel 80. The reinforcing panel 80 includes a main body portion 80A and an extension portion 80B, and the main body portion 80A is fixed to the fixing portion 50 together with the side leg portions 64B to reinforce the side panel 48. On the other hand, the extension portion 80B is a portion extending 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. As a result, 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 to the second joint portion 92, which is farther from the fixed portion 50 than the first joint portion 90, in addition to the first joint portion 90. .. In this way, it is possible to disperse the load input from the vehicle seat 100 to the side panel 48 to the second joint portion 92 and suppress the concentration on the first joint portion 90, and by extension, the vehicle seat 100. It is possible to improve the mounting strength of the.

Further, since the mounting strength of the vehicle seat 100 can be improved without increasing the thickness of the entire side panel 48, it is possible to suppress an increase in material cost and mass.

Further, the side panel 48 of the present embodiment is formed with a non-joining region X that is not joined to the side member 16, and the first joining portion 90 is arranged at a position adjacent to the non-joining region X. As a result, even when a non-joint region X in which the joint strength of the side panel 48 is weak is formed due to the lower structure of the vehicle 10, the input is made from a position adjacent to the non-joint region X, that is, the side leg portion 64B. The stress acting on the first joint 90 arranged at a position where a high stress is generated by the load can be dispersed in the second joint 92. It is possible to increase the durability of the mounting portion of the vehicle seat 100 and increase the degree of freedom in the layout of the lower part of the vehicle.

Further, in the present 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 pedestal 60 than the non-joint region X in the side panel 48. As a result, in the side panel 48, the load input to the range where high stress is generated can be efficiently dispersed, so that the durability of the mounting portion of the vehicle seat 100 can be efficiently improved.

Further, in the present embodiment, the non-joint region X of the side panel 48 is a region that covers the joint portion between the side member and the cross member. As a result, it is possible to improve the mounting strength of the vehicle seat 100 and the rigidity of the skeletal structure of the vehicle 10 at the same time.
[Supplemental Information]

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 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 vehicle front side with respect to the non-joint region X. The present invention is not limited to this, and the third or fourth joint portion 68 may be used as the second joint portion.

Further, in the above embodiment, the side leg portion 64B of the pedestal 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 legs of the pedestal may be fixed to a floor panel joined to another skeleton member arranged at the lower part of the vehicle such as a cross member, and the vehicle seat mounting structure of the present invention may be applied to the floor panel. ..

16 Side member (skeleton member)
48 Side panel (floor panel)
60 Pedestal 62 Mounting surface 64B Side legs (legs)
80 Reinforcement panel 80A Main body 80B Extension 90 1st joint 92 2nd joint 94 3rd joint 100 Vehicle seat 102 Seat cushion

Claims (1)

A mounting surface on which the seat cushion of the vehicle seat can be mounted, and a pedestal having legs extending from the previously described mounting surface and fixed to the floor panel.
The floor portion of the vehicle is formed on the vehicle upper side of the skeleton member arranged at the lower part of the vehicle, the fixed portion to which the leg portion is fixed, the first joint portion joined to the skeleton member, and the first joint portion. A floor panel having a second joint portion joined to the skeleton member at a position farther from the fixed portion than the joint portion.
A main body portion that is fixed together with the legs in the fixed portion to reinforce the floor panel, an extension portion that extends from the main body portion toward the second joint portion, and the extension portion that is joined to the floor panel. A reinforcing panel having a third joint and arranged so as to cover a part of the floor panel.
Vehicle seat mounting structure.