JP2010047189A - Seat supporting structure for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat supporting structure for an automobile capable of assuring a strength of a seat fixing part and at the same time capable of restricting a deformation of the seat fixing part due to a load applied at a side collision. <P>SOLUTION: A seat supporting member 10 fixed to a floor member 1 is provided with a reinforcing member 15, the reinforcing member 15 has an opposing part 15a connected to be oppositely faced against a seat fixing table 17a, an extended part 15b extending from the opposing part 15a along a stepped part 18 and connected to the stepped part 18, and a front wall part 15c and a rear wall part 15d extending downward from a front edge and a rear edge of the extended part 15b and the opposing part 15a and connected to a front vertical wall 10a and a rear vertical wall 10b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a seat support structure for an automobile in which a seat is supported by a seat support member attached to a floor member.

  A front seat of an automobile is supported so as to be slidable in the longitudinal direction of the vehicle so as to obtain a riding posture according to the physique of the occupant. When such a front seat is supported by a floor member, for example, Patent Document 1 adopts a structure in which a seat is attached to an end portion of a seat support member that is fixed to the floor member and extends in the vehicle width direction.

Further, in Patent Document 1, in order to secure a space for an occupant's foot seated on a rear seat to enter, the center portion in the vehicle width direction of the seat support member is recessed in a stepped shape.
Japanese Utility Model Publication No. 55-63268

  By the way, when the central portion of the seat support member is recessed as in the conventional case, the seat support strength is insufficient, or the load tends to concentrate on the recessed portion at the time of a side collision, so that the seat mounting portion is on the inside. There is a risk of deformation such as breaking.

  The present invention has been made in view of the above-described conventional situation, and provides a seat support structure for an automobile capable of ensuring the seat support strength and suppressing the deformation of the seat mounting portion due to a load at the time of a side collision. It is an issue.

  The present invention is a seat mounting portion that is attached to a floor member, extends upright from the floor member, and has a seat mounting seat formed on the upper surface, and a step-down formation from the seat mounting portion downward in the vehicle width direction. A seat support structure for an automobile in which a seat is supported by a seat support member having a stepped-down portion, wherein the seat support member includes a front vertical wall, a rear vertical wall, and the front and rear walls extending in the vehicle width direction. A seat supporting member having an upper wall for joining upper edges of the vertical walls, further comprising a front and rear flange portion formed by bending at the lower edge of the front and rear vertical walls and joined to the floor member; Is provided with a reinforcing member, and the reinforcing member is connected to the seat mounting seat so as to oppose the seat mounting seat, and extends from the opposing portion along the stepped portion. A combined extension, and the extension and opposing portion , Extending from the rear edge downward, before the front, coupled to the rear vertical wall is characterized by having a rear wall portion.

  According to the seat support structure of the present invention, the seat support member has a front cross-sectional hat shape having a front vertical wall, a rear vertical wall, and an upper wall that joins the upper edges of the front and rear vertical walls. The reinforcing member disposed on the support member includes a facing portion facing the seat mounting seat, an extending portion extending from the facing portion along the stepped portion, and downward from the front and rear edges of the extending portion and the facing portion. Since it has a downward U-shape having front and rear wall portions, the rigidity and strength of the seat support member in the vertical direction, the front-rear direction, and the vehicle width direction can be increased with a simple structure. As a result, it is possible to increase the seat support strength while ensuring a space for the rear passenger's feet to enter the seat support member, and it is possible to prevent the seat mounting portion from being deformed to the vehicle interior due to a load at the time of a side collision. .

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

  1 to 8 are views for explaining a vehicle seat support structure according to an embodiment of the present invention. FIGS. 1, 2 and 3 are plan views of floor members on which seats are respectively disposed. 4 and 5 are a plan view and a rear view of the sheet supporting member for supporting the sheet, and FIGS. 6, 7 and 8 are sectional views of the sheet supporting member (VI-- in FIG. 4). VI, VII-VII.VIII-VIII sectional view).

  In the figure, reference numeral 1 denotes a front floor member constituting a front passenger compartment of an automobile, and a front edge portion 1a of the front floor member 1 extends upward from the front edge portion 1a and extends into the vehicle compartment and the engine compartment. A dash panel (not shown) is defined, and a rear floor member (not shown) constituting a rear passenger compartment is connected to the rear edge 1b. A rear seat (not shown) is mounted on the rear floor member.

  A tunnel portion 1c bulging upward is formed in the vehicle width direction central portion of the front floor member 1 so as to extend in the front-rear direction, and the left and right edge portions 1d, 1d are rockers extending in the vehicle front-rear direction. Panels 2 and 2 are connected. Here, since the front floor member 1 is substantially left-right symmetrical with respect to the vehicle center line C passing through the tunnel portion 1c, only the right side portion of the front floor member 1 will be described.

  The front floor member 1 includes a cross member 3 that extends in the vehicle width direction and is disposed at the center in the front-rear direction of the upper surface of the floor member 1. The cross member 3 has a hat shape in cross section, and front and rear flange portions 3 b and 3 b of the cross member 3 are coupled to the front floor member 3. The left and right end portions 3 a of the cross member 3 are coupled to the rocker panel 2.

  The front floor member 1 includes a front floor member 4 and a rear floor member 5 that are disposed on the lower surface of the floor member 1 and extend in the front-rear direction. The front and rear floor members 4 and 5 are disposed between the tunnel portion 1 c and the rocker panel 2. The front floor member 4 is arranged on the front side of the cross member 3 and the rear floor member 5 is arranged on the rear side of the cross member 3 so as to form a straight line in the front-rear direction.

  The front and rear floor members 4, 5 have an upward hat shape when viewed in cross section, and the left and right flange portions 4 a, 5 a are coupled to the front floor member 1, respectively.

  Front seats 7 are disposed on the left and right sides of the front floor member 1 across the tunnel portion 1c. The front seat 7 includes a seat cushion 7a, a seat back 7b supported by the seat cushion 7a so as to be pivotable back and forth, and a headrest 7c attached to the seat back 7b.

  The front seat 7 is supported by left and right seat rails 8 and 9 that are disposed on the front floor member 1 and extend in the vehicle front-rear direction. Specifically, the seat frame 12 attached to the lower surface of the seat cushion 7a is supported by the left and right seat rails 8 and 9 so as to be slidable in the vehicle front-rear direction and lockable at an arbitrary seating position.

  The front seat 7 is an electric power seat that is slid and driven by an electric motor (not shown) built in the seat cushion 7a. This is configured to automatically move and lock to a desired seating position by operating an operation switch or the like disposed in the driver's seat.

  The front end portions 8a and 9a of the left and right seat rails 8 and 9 are fixed to the upper wall 3c of the cross member 3 with bolts. The rear end portion 8b of the left seat rail 8 is bolted and fixed to the side wall 1e of the tunnel portion 1c.

  The rear end portion 9b of the right seat rail 9 is bolted to a seat support member 10 attached to the front floor member 1, and has the following structure in detail.

  The seat support member 10 is erected upward from the front floor member 1, has a seat attachment portion 17 having a seat attachment seat 17 a formed on the upper surface, extends from the seat attachment portion 17 inward in the vehicle width direction, and the seat And a stepped portion 18 formed so as to be positioned below the mounting seat 17a. As a result, a space A is formed between the stepped-down portion 18 and the seat cushion 7a so that the feet of the passenger seated on the rear seat can enter.

  The seat support member 10 includes a front vertical wall 10a extending in the vehicle width direction, a rear vertical wall 10b, and an upper wall 10c integrally connecting the upper edges of the front and rear vertical walls 10a and 10b. The cross section has a substantially hat shape having front and rear flange portions 10d and 10d bent outward at the lower edges of the rear vertical walls 10a and 10b.

  The front and rear flange portions 10d, 10d are joined to the left and right flange portions 5a, 5a of the rear floor member 5 together with the front floor member 1 by welding.

  An outer end portion located at a height of the upper wall 10c of the seat support member 10 is the seat mounting seat 17a. A loop-shaped bead portion 10e is formed at the stepped portion 18 of the upper wall 10c.

  The outer end surface of the seat support member 10 is in contact with the rocker panel 2 or opposed with a slight gap. A lower end portion of a center pillar 13 extending in the vertical direction is connected to a portion of the rocker panel 2 facing the sheet support member 10. Thereby, when viewed from the side of the vehicle, the center pillar 13 and the seat support member 10 overlap each other (see FIG. 1).

  A reinforcing member 15 is disposed in the sheet support member 10. The reinforcing member 15 includes a facing portion 15a disposed so as to face the lower surface of the seat mounting seat 17a of the upper wall 10c, and an extension extending from the facing portion 15a along the lower surface of the stepped portion 18 of the upper wall 10c. It has a U-shaped cross section that has a portion 15b and front and rear wall portions 15c and 15d extending downward from front and rear edges of the extension portion 15b and the opposing portion 15a.

  A nut 16 is joined to the lower surface of the facing portion 15a, and a rear end portion 9b of the seat rail 9 is overlapped with the upper wall 10c and the facing portion 15a by a bolt (not shown) inserted into the nut 16. It is fixed to the part.

  And the opposing part 15a of the said reinforcement member 15 and the sheet | seat mounting seat 17a of the upper wall 10c are couple | bonded by multiple spots, and the extension part 15b and the stepped part 18 of the upper wall 10c are couple | bonded by multiple spots. Further, the front and rear wall portions 15c and 15d are connected to the front and rear vertical walls 10a and 10b at a plurality of locations by spot welding (see the crosses in FIGS. 4 and 5).

  According to the present embodiment, the sheet supporting member 10 has a cross-sectional hat shape having the front vertical wall 10a, the rear vertical wall 10b, and the upper wall 10c that joins the upper edges of the front and rear vertical walls 10a, 10b. The reinforcing member 15 disposed in the seat support member 10 includes a facing portion 15a facing the seat mounting seat 17a, an extending portion 15b extending from the facing portion 15a along the stepped portion 18 and the extending portion. 15b and front portion 15a, front portion extending downward from the rear edge, and rear wall portions 15c and 15d having a downward U-shape, and the reinforcing member 15 is joined to the seat support member 10 by welding. The rigidity and strength of the support member 10 in the vertical direction, the front-rear direction, and the vehicle width direction can be increased. As a result, it is possible to increase the seat support strength while securing a space A in which the legs of the rear occupant enter the seat support member 10, and to prevent the seat mounting portion 17 from being deformed inward by the load at the time of a side collision. be able to.

  Here, the front seat 7 of this embodiment is an electric power seat incorporating an electric motor. For this reason, since the weight of the whole sheet | seat becomes large, it is necessary to raise the intensity | strength of the sheet | seat support member 10. FIG. However, if the sheet supporting member is used as it is, there is a concern about the above-mentioned insufficient strength. In this case, it is disadvantageous in cost to newly design the sheet support member. In the present embodiment, the strength can be ensured with a simple structure in which the reinforcing member 15 is simply added to the existing sheet support member 10, and an increase in cost can be suppressed as compared with a case where a dedicated part is newly designed.

  In the above-described embodiment, the case where the front seat is supported has been described. However, the present invention is not limited to this. For example, when a three-row seat is provided, the invention is applied to a seat support member that supports the rear seat. It is also possible.

It is a top view of the front floor member by which the front seat by one embodiment of the present invention was carried. It is a cross-sectional side view of the seat support part of the front floor member. It is a cross-sectional front view of the seat support part of the front floor member. It is a top view of the sheet | seat support member arrange | positioned at the said front floor member. It is a rear view of the sheet support member. FIG. 5 is a cross-sectional view of the sheet support member (a cross-sectional view taken along line VI-VI in FIG. 4). It is sectional drawing (VII-VII sectional view taken on the line of FIG. 4) of the said sheet | seat support member. FIG. 5 is a cross-sectional view of the sheet support member (a cross-sectional view taken along line VIII-VIII in FIG. 4).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front floor member 7 Front seat 10 Seat support member 10a Front vertical wall 10b Rear vertical wall 10c Upper wall 10d Front and rear flange part 15 Reinforcement member 15a Opposing part 15b Extension part 15c Front wall part 15d Rear wall part 17 Seat attachment part 17a Seat mounting seat 18 Stepped part

Claims (1)

A seat mounting portion attached to the floor member, extending upright from the floor member and having a seat mounting seat formed on the upper surface; and a stepped-down portion formed stepwise downward from the seat mounting portion in the vehicle width direction; A seat support structure for an automobile that supports a seat by a seat support member comprising:
The seat support member has a front vertical wall extending in the vehicle width direction, a rear vertical wall, and an upper wall that joins the upper edges of the front and rear vertical walls, and is further bent to the lower edge of the front and rear vertical walls Formed and having front and rear flanges joined to the floor member;
A reinforcing member is disposed on the seat support member, and the reinforcing member extends along the stepped portion from the facing portion, the facing portion coupled to face the seat mounting seat, An extension portion coupled to the stepped portion, and front and rear wall portions extending downward from front and rear edges of the extension portion and the opposing portion and coupled to the front and rear vertical walls. Automobile seat support structure.

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