JP2018030438A - Mounting structure for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently improve the rigidity of a seat mounting portion while setting a seat seating position higher than the conventional one, to reduce seat vibration and to eliminate a feeling of instability given to an occupant. On the upper part of a floor panel 2, cross members 3A and 3B connecting a floor tunnel portion 21 and a side sill portion 22 are arranged along a vehicle width direction, and a seat 6 is attached to a seat rail assembly 7. The assembly 7 is attached to the left and right cross members 3A, 3B, 4A, 4B via the seat mounting brackets 8A to 8D, and the seat mounting brackets 8A to 8D are the upper surfaces of the cross members 3A, 3B, 4A, 4B. The left and right seat mounting brackets extending above the vehicle from 3Aa, 3Ba, 4Aa, 4Ba, and the upper surfaces 8Aa to 8Da of the seat mounting brackets 8A to 8D are arranged at a position higher than the upper surface 21a of the tunnel portion 21, and are located inside the vehicle. The 8A and 8B are arranged with the tunnel portion 21 interposed therebetween, and a connecting member 9 for connecting the left and right seat mounting brackets 8A and 8B is provided above the tunnel portion 21. [Selection diagram] Fig. 2

Description

  The present invention relates to a mounting structure for a vehicle seat.

  In the conventional vehicle seat mounting portion structure, the height of the seat mounting portion is set at substantially the same height as the upper surface of the tunnel-like backbone (floor tunnel) provided at the center in the vehicle width direction of the floor pan. (For example, refer to Patent Document 1). In such a conventional attachment structure, the seat bracket that supports the fixed portion of the vehicle seat on the vehicle compartment center side (vehicle width direction center side) is joined to the left and right side surfaces of the backbone, etc. It is configured to ensure rigidity.

JP 2014-227029 A

  However, in the conventional vehicle seat mounting portion structure described above, the height of the seat mounting portion is substantially the same as the upper surface of the backbone, and is set at a low position, so a super-height vehicle with a high seating position When applied to this seat, the seat bracket has a tower-like structure that tends to collapse. For this reason, in the conventional vehicle seat mounting portion structure, there is a concern that the rigidity of the seat mounting portion is reduced, and seat vibration may occur or the occupant may feel instability while the vehicle is traveling. there were.

  The present invention has been made in view of such a situation, and its purpose is to efficiently improve the rigidity of the seat mounting portion while setting the seat seating position higher than the conventional seat seating position, and while the vehicle is running It is an object of the present invention to provide a vehicle seat mounting portion structure capable of reducing seat vibration generated in a vehicle and the like and eliminating instability given to passengers.

  In order to solve the above-described problems of the prior art, according to the present invention, a floor tunnel portion extending in the vehicle front-rear direction is provided at an intermediate portion of the floor panel in the vehicle width direction. Side sill portions that extend in the vehicle front-rear direction are provided on both left and right sides in the width direction, and left and right cross members that connect the floor tunnel portion and the side sill portions are provided in the vehicle width direction at the top of the floor panel. Each of the right and left seats is attached to a seat rail assembly, and the seat rail assembly is attached to the left and right cross members via a seat mounting bracket. The seat mounting bracket extends upward from the upper surface of the left and right cross members, and the upper surface of the seat mounting bracket The left and right seat mounting brackets located on the vehicle inner side among the seat mounting brackets are disposed at a position higher than the upper surface of the tunnel portion, and are positioned on the vehicle inner side with the floor tunnel portion interposed therebetween. A connecting member that connects the left and right seat mounting brackets is provided above the floor tunnel portion.

As described above, in the vehicle seat mounting portion structure according to the present invention, a floor tunnel portion extending in the vehicle front-rear direction is provided at an intermediate portion in the vehicle width direction of the floor panel. Side sill portions that extend in the vehicle front-rear direction are provided on both left and right sides in the vehicle width direction, and left and right cross members that connect the floor tunnel portion and the side sill portions are provided in the vehicle width direction at the top of the floor panel. The left and right seats are attached to a seat rail assembly, and the seat rail assembly is attached to the left and right cross members via a seat mounting bracket, and the seat mounting bracket is The upper surface of the left and right cross members extends above the vehicle, and the upper surface of the seat mounting bracket is higher than the upper surface of the floor tunnel portion. Of the seat mounting brackets, left and right seat mounting brackets located on the vehicle inner side are arranged with the floor tunnel portion interposed therebetween and connect the left and right seat mounting brackets located on the vehicle inner side. Since the connecting member is provided above the floor tunnel portion, the following effects can be obtained.
That is, in the mounting portion structure of the present invention, the upper surface is positioned higher than the upper surface of the floor tunnel portion, and the left and right seat mounting brackets positioned on the inner side of the vehicle are disposed with the floor tunnel portion interposed therebetween. Since they are connected to each other by the connecting member provided above the seat, the rigidity of the seat mounting portion can be improved. Therefore, even when applied to a super height vehicle or the like in which the seat seating position is set high, it is possible to suppress the deformation of the seat mounting portion and to prevent the seat mounting bracket from falling sideways. In addition, it is possible to reduce seat vibration that occurs during traveling of the vehicle, to eliminate the instability of the occupant seated on the seat, and to ensure stable riding comfort.

It is the perspective view which looked at the seat attachment part vicinity to which the attachment part structure of the vehicle seat which concerns on 1st Embodiment of this invention was applied from the vehicle front. It is an expansion perspective view of the X section in FIG. It is the front view which looked at the seat attachment part vicinity in FIG. 1 from the vehicle front. It is the perspective view which looked at the seat attachment part to which the attachment part structure of the vehicle seat which concerns on 2nd Embodiment of this invention was applied from the vehicle front diagonally upward. It is the perspective view which looked at the seat attachment part to which the attachment part structure of the vehicle seat which concerns on the modification of 1st Embodiment of this invention was applied from the vehicle back diagonally.

Hereinafter, the present invention will be described in detail based on illustrated embodiments.
1 to 5 show a mounting structure of a vehicle seat according to an embodiment of the present invention. In the figure, the arrow Fr direction indicates the front of the vehicle, the arrow I direction indicates the inner side in the vehicle width direction, and the arrow U direction indicates the upper side of the vehicle.

[First Embodiment]
1 to 3 show a mounting structure of a vehicle seat according to the first embodiment of the present invention.
The vehicle 1 to which the vehicle seat mounting portion structure according to the first embodiment of the present invention is applied is a vehicle having a high seating position (for example, a super height vehicle) as shown in FIGS. The floor panel 2 constituting the passenger compartment floor is provided. A floor tunnel portion 21 extending in the vehicle front-rear direction is provided at the center of the floor panel 2 in the vehicle width direction (intermediate portion in the vehicle width direction). The floor tunnel portion 21 is formed in a substantially trapezoidal cross section protruding upward from the vehicle, and is formed on the surface of the floor panel 2 so as to bisect the floor surface on the driver's seat side and the floor surface of the passenger seat. Is provided. And the side sill part 22 extended in the vehicle front-back direction is provided in the left-right both sides of the vehicle width direction of the floor panel 2. As shown in FIG.

As shown in FIGS. 1 to 3, left and right front cross members 3 </ b> A and 3 </ b> B and rear cross members 4 </ b> A and 4 </ b> B that connect the floor tunnel portion 21 and the side sill portion 22 are arranged at the top of the floor panel 2. Are arranged at the same position along the vehicle width direction with a predetermined interval therebetween. The front cross members 3A, 3B and the rear cross members 4A, 4B are vertical walls having a substantially hat-shaped cross section having flange portions 3a, 3b, 4a, 4b at front, rear, left and right ends, and these flange portions 3a, 3b. , 4a, 4b are erected on the top of the floor panel 2 by joining them to the upper surface of the floor panel 2, the inclined surface of the floor tunnel portion 21, and the indoor side surface of the side sill portion 22 by spot welding or the like. In addition, the upper surfaces of the left and right front cross members 3A, 3B and the rear cross members 4A, 4B are set at substantially the same height as the upper surface 21a of the floor tunnel portion 21.
A brace 5 is provided in the floor tunnel portion 21 at the same position as the left and right front cross members 3A and 3B and the rear cross members 4A and 4B. The rigidity of the tunnel portion 21 is increased.

  On the other hand, as shown in FIGS. 1 and 2, a vehicle seat 6 having a high seating position is mounted in the passenger compartment of the vehicle 1 of the present embodiment. The vehicle seat 6 is a front seat provided on the front side of the vehicle in the passenger compartment, and includes a front seat 6A on the passenger side and a front seat 6B on the driver's side that are disposed on both the left and right sides in the vehicle width direction. Has been. Lower portions of the front seats 6A and 6B are respectively attached to a pair of seat rail assemblies 7 provided at a predetermined interval in the vehicle width direction. The seat rail assembly 7 includes left and right front cross members 3A, 3B and left and right seat mounting brackets 8A, 8B, and left and right seat mounting brackets 8C, 8D. The rear cross members 4A and 4B are attached.

  As shown in FIGS. 1 to 3, the seat mounting brackets 8A to 8D of the present embodiment are located above the upper surfaces 3Aa, 3Ba, 4Aa, 4Ba of the left and right front cross members 3A, 3B and the rear cross members 4A, 4B. The upper surfaces 8Aa to 8Da of the seat mounting brackets 8A to 8D are disposed at a position higher than the upper surface 21a of the floor tunnel portion 21. Therefore, the seat mounting brackets 8A to 8D are quadrangular pyramid-shaped cylindrical bodies whose upper surface portions are closed, and are provided in an upright state. The heights of the seat mounting brackets 8A to 8D from the upper surfaces 3Aa, 3Ba, 4Aa, 4Ba of the front cross members 3A, 3B and the rear cross members 4A, 4B are determined from the viewpoint of ensuring stability and the like. To about half of the height from the upper surface 21a of the floor tunnel portion 21 to the upper surface 21a.

Of the seat mounting brackets 8A to 8D, the left and right seat mounting brackets 8A and 8B located inside the vehicle are disposed to face each other with the floor tunnel portion 21 interposed therebetween. Moreover, the left and right seat mounting brackets 8 </ b> A and 8 </ b> B located inside the vehicle are connected by a connecting member 9, and the left and right seat mounting brackets 8 </ b> A and 8 </ b> B are integrated via the connecting member 9. The connecting member 9 is provided above the floor tunnel portion 21 and is disposed so as to extend in the vehicle width direction across the floor tunnel portion 21.
Further, the connecting member 9 is a member having a predetermined width in the vertical direction, and has a structure in which both left and right end portions are attached to the upper part of the front surface (or rear surface) of the seat mounting brackets 8A and 8B by welding (or bolt fastening). have.

In the mounting portion structure of the present embodiment, seat mounting brackets 8A to 8D are mounted on the inner sides of both ends of the left and right front cross members 3A and 3B and the rear cross members 4A and 4B, as shown in FIG. Reinforcing members 10 </ b> A to 10 </ b> D that increase the rigidity of the portions are provided. The reinforcing members 10A to 10D have an outer shape and a cross-sectional shape corresponding to the ends of the left and right front cross members 3A and 3B and the rear cross members 4A and 4B and the side surfaces of the floor tunnel portion 21, which are arranged. , 3B, 4A, 4B and the side of the floor tunnel portion 21 are arranged in a state of being arranged. The seat mounting brackets 8A to 8D are arranged at positions sandwiching the reinforcing members 10A to 10D, the left and right front cross members 3A and 3B, and the rear cross members 4A and 4B, and the left and right front cross members 3A and 3B. The rear cross members 4A and 4B are provided on the upper surfaces 3Aa, 3Ba, 4Aa and 4Ba.
Therefore, the front and rear flange portions 8Ab to 8Db that extend downward are provided on the front and rear surfaces of the front cross members 3A and 3B and the rear cross members 4A and 4B at the front and rear portions of the lower opening periphery of the seat mounting brackets 8A to 8D. -10D to be joined and attached. Further, the left and right side portions of the periphery of the lower opening of the seat mounting brackets 8A to 8D have left and right flange portions 8Ac to 8Dc extending in the vehicle width direction, and upper surfaces 3Aa and 3Aa of the front cross members 3A and 3B and the rear cross members 4A and 4B. 3Ba, 4Aa, and 4Ba are joined and attached via reinforcing members 10A to 10D.

Thus, in the attachment part structure of the vehicle seat 6 according to the first embodiment of the present invention, the cross members 3A, 3B, 4A, 4B that connect the floor tunnel part 21 and the side sill part 22 are along the vehicle width direction. The front seats 6A and 6B of the vehicle seat 6 are attached to the seat rail assembly 7, and the seat rail assembly 7 is attached to the left and right cross members via seat mounting brackets 8A to 8D. The seat mounting brackets 8A to 8D are attached to 3A, 3B, 4A, and 4B, and extend upward from the upper surface of the cross members 3A and 3B. Further, the upper surfaces 8Aa to 8Da of the seat mounting brackets 8A to 8D are arranged at a position higher than the upper surface 21a of the floor tunnel portion 21, and the left and right seat mounting brackets 8A and 8B located inside the vehicle are connected to the floor tunnel portion 21. A connecting member 9 disposed between the left and right seat mounting brackets 8 </ b> A and 8 </ b> B is provided above the floor tunnel portion 21.
Therefore, in the mounting portion structure of the first embodiment, the upper and lower seat mounting brackets 8A and 8B, which are located on the inner side of the vehicle, have the upper surfaces 8Aa to 8Da positioned higher than the upper surface 21a of the floor tunnel portion 21. Since the structure is integrated by being connected by the connecting member 9 provided above the floor tunnel portion 21, the rigidity of the seat mounting portion can be improved. Therefore, according to the mounting portion structure of the first embodiment, even when applied to a super height vehicle having a high seating position, the load applied to the seat mounting portion can be supported by the connecting member 9, and the seat mounting portion The deformation of the seat mounting brackets 8A and 8B can be effectively prevented from falling down. In addition, since it is possible to reduce seat vibration that occurs during traveling of the vehicle 1, it is possible to eliminate the instability of the passenger seated on the front seats 6A and 6B of the vehicle seat 6, and to ensure stable riding comfort. Can be secured.

Moreover, in the attachment part structure of 1st Embodiment, reinforcement member 10A-10D is provided inside the both ends of right-and-left front cross member 3A, 3B and rear cross member 4A, 4B, respectively, and seat attachment bracket 8A- 8D is a position sandwiching the reinforcing members 10A to 10D, the left and right front cross members 3A and 3B, and the rear cross members 4A and 4B, and the left and right front cross members 3A and 3B and the rear cross members 4A and 4B. Are provided on the upper surfaces 3Aa, 3Ba, 4Aa, 4Ba.
Therefore, in the attachment portion structure of the first embodiment, the rigidity of the attachment portions of the seat attachment brackets 8A to 8D is enhanced by the reinforcing members 10A to 10D. Therefore, according to the mounting portion structure of the first embodiment, the left and right front cross members 3A and 3B and the rear cross member 4A that may be generated when a load is applied to the mounting portions of the seat mounting brackets 8A to 8D. , 4B can be reduced, and deformation of the seat mounting brackets 8A to 8D can be reduced.

  Furthermore, in the attachment part structure of 1st Embodiment, the connection member 9 is a member which has a predetermined | prescribed width | variety in the vertical direction, and has the structure attached to the front surface or rear surface of seat attachment bracket 8A, 8B. Therefore, according to the mounting portion structure of the first embodiment, the connecting member 9 can be effectively operated against the deformation due to the horizontal tilt of the seat mounting brackets 8A and 8B, and the left and right seat mounting brackets 8A and 8B. Can be reliably suppressed.

[Second Embodiment]
FIG. 4 shows an attachment structure of a vehicle seat according to the second embodiment of the present invention.
The mounting portion structure according to the second embodiment of the present invention differs from the mounting portion structure of the first embodiment in that the left and right seat mounting brackets are arranged with the floor tunnel portion 21 interposed therebetween as shown in FIG. 8A and 8B and the connecting member 9 extending in the vehicle width direction across the floor tunnel portion 21 have a bowl-shaped structure integrally formed, and are configured as an integrated seat mounting bracket 80. That is. The integrated seat mounting bracket 80 is a portion that forms the connecting member 9 and the left and right bracket portions 80A and 80B that form the left and right seat mounting brackets 8A and 8B, and connects the left and right bracket portions 80A and 80B. Part 90. Further, the connecting portion 90 is fixed so as to cover the upper surface 21 a of the floor tunnel portion 21 in a state of being grounded to the upper surface 21 a of the floor tunnel portion 21. Therefore, the central portion of the connecting portion 90 in the vehicle width direction is formed in a shape that is lower than the upper surfaces 80Aa and 80Ba of the left and right bracket portions 80A and 80B, and is recessed below the vehicle, and the lower side is the upper surface of the floor tunnel portion 21. It has a shape corresponding to 21a. Other configurations are the same as those of the first embodiment, and the same members and parts are denoted by the same reference numerals.

  In the vehicle seat mounting portion structure according to the second embodiment of the present invention, the left and right seat mounting brackets 8A and 8B arranged with the floor tunnel portion 21 therebetween, and the connecting member 9 are integrally formed, The connecting portion 90 that connects the left and right seat mounting brackets 8A and 8B is fixed in a state of being grounded to the upper surface 21a of the floor tunnel portion 21, and the central portion of the connecting portion 90 in the vehicle width direction is the left and right seat mounting bracket 8A. , 8B is lower than the upper surface of the vehicle, and is recessed in the lower part of the vehicle. That is, the left and right bracket portions 80A and 80B and the connecting portion 90 for connecting the left and right bracket portions 80A and 80B are integrated as an integrated seat mounting bracket 80. Therefore, according to the mounting portion structure of the first embodiment, the rigidity of the seat mounting portion can be increased, and deformation of the seat mounting bracket 80 and the left and right cross members 3A, 3B, 4A, and 4B at the time of load input can be achieved. Can be further reduced. Other effects can be obtained in the same manner as in the first embodiment.

  While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

  For example, the connecting member 9 in the first embodiment described above is a member having a predetermined width in the vertical direction, and has a structure in which the left and right ends are attached to the front surfaces (or rear surfaces) of the seat mounting brackets 8A and 8B. However, it is also possible to use connecting members 9A and 9B having an L-shaped cross section as shown in FIG. In this case, the connecting member 9A on the front side is attached to the upper surfaces 8Aa and 8Ba and the front surface of the seat mounting brackets 8A and 8B by bolt fastening, and the connecting member 9B on the rear side is the upper surfaces 8Aa and 8Ba and the rear surfaces of the seat mounting brackets 8A and 8B. It is attached by bolt fastening. Moreover, on the upper surfaces 8Aa and 8Ba of the seat mounting brackets 8A and 8B, the seat rail assembly 7 and the connecting members 9A and 9B are fastened together.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Floor panel 3A, 3B Front side cross member 3Aa, 3Ba Upper surface 3a, 3b Flange part 4A, 4B Rear side cross member 4Aa, 4Ba Upper surface 4a, 4b Flange part 6 Vehicle seat 6A Passenger seat side front seat 6B Driving Seat-side front seat 8A to 8D Seat mounting bracket 8Aa to 8Da Upper surface 8Ab to 8Db Front and rear flange portions 8Ac to 8Dc Left and right flange portions 9, 9A, 9B Connecting members 10A to 10D Reinforcing member 21 Floor tunnel portion 21a Upper surface 22 Side sill portion 80 Integral seat mounting bracket 80A, 80B Left and right bracket part 90 Connection part

Claims (4)

A floor tunnel portion extending in the vehicle front-rear direction is provided at an intermediate portion of the floor panel in the vehicle width direction, and side sills extending in the vehicle front-rear direction are provided on the left and right sides of the floor panel in the vehicle width direction. Part is provided,
On the top of the floor panel, left and right cross members that connect the floor tunnel portion and the side sill portion are respectively arranged along the vehicle width direction,
The left and right seats are attached to a seat rail assembly, and the seat rail assembly is attached to the left and right cross members via a seat attachment bracket.
The seat mounting bracket extends upward from the upper surface of the left and right cross members, and the upper surface of the seat mounting bracket is disposed at a position higher than the upper surface of the floor tunnel portion.
Of the seat mounting brackets, the left and right seat mounting brackets located on the vehicle inner side are arranged with the floor tunnel portion interposed therebetween, and the connecting member for connecting the left and right seat mounting brackets located on the vehicle inner side is the A vehicle seat mounting part structure provided above a floor tunnel part.   Reinforcing members are respectively provided inside both ends of the left and right cross members, and the seat mounting bracket is positioned on the upper surface of the left and right cross members at a position sandwiching the reinforcing member and the left and right cross members. The vehicle seat mounting portion structure according to claim 1, wherein the vehicle seat mounting portion structure is provided.   The attachment of the vehicle seat according to claim 1, wherein the connecting member is a member having a predetermined width in a vertical direction and has a structure attached to a front surface or a rear surface of the seat mounting bracket. Part structure.   The left and right seat mounting brackets arranged with the floor tunnel portion interposed therebetween and the connecting member are integrally formed, and the connecting portion for connecting the left and right seat mounting brackets is formed on the upper surface of the floor tunnel portion. The vehicle is fixed in a grounded state, and a central portion in the vehicle width direction of the connecting portion is lower than the upper surfaces of the left and right seat mounting brackets, and is formed in a shape recessed toward the vehicle lower side. The vehicle seat mounting part structure according to claim 1.

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