JP2008265456A - Vehicular seat supporting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular seat supporting structure capable of making a vehicle floor positively support a side collision load without causing buckling of a supporting portion of a cushion frame upon side collision. <P>SOLUTION: An outside area and an inside are in a vehicular width direction of the cushion frame 2 are supported on a vehicle body floor 6 through seat rails 4, 5 and a pedestal 9. A frame material 10 tilting toward a vehicular width direction inside lower side is protrusively provided on the seat rail 4 in the outside area, and a load receiving bracket 11 is fixed at a position to which a tip end portion of the frame material 10 is opposed on the vehicle body floor 6. The side collision load is supported by the vehicle body floor 6 through the frame material 10 and the load receiving bracket 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle seat support structure having a function of protecting an occupant against a load input from the side of a vehicle.

Most of the vehicle seats for the front seat have a cushion frame installed on a pair of seat rails installed on the vehicle body floor along the longitudinal direction of the vehicle body so as to be movable back and forth.
Such a general vehicle seat does not have a special energy absorption structure for a load input from the side, and therefore, the collision energy cannot be efficiently absorbed by the seat itself at the time of a vehicle side collision.

  As a vehicle seat to cope with this, a cushion-shaped reinforcing member that extends in the vehicle width direction is provided on the cushion frame, and a side collision load is transmitted to the console box portion in the center in the vehicle width direction through the reinforcing member. Has been devised (see, for example, Patent Document 1).

In addition, as another vehicle seat technology, a rod-shaped reinforcing member that is inclined obliquely is provided on the seat back frame, and when the seat is inclined due to buckling of the vehicle body floor due to a side collision, the reinforcing member becomes horizontal. Some have been devised to transmit the side impact load to the console box.
JP-A-6-255411 Japanese Patent Laid-Open No. 7-81465

  However, both of these conventional techniques transmit the load to the inside in the vehicle width direction via the reinforcing member when a side collision load is input, and the buckling of the support portion (seat rail) of the cushion frame is performed. It does not suppress. For this reason, there is a possibility that the cushion frame itself tilts due to the input of the side collision load. In this case, the collision load cannot be efficiently released to the vehicle body floor.

  Accordingly, the present invention is intended to provide a vehicle seat support structure that can suppress buckling of the support portion of the cushion frame at the time of a side collision and can reliably support a side collision load on a vehicle body floor. .

The invention according to claim 1, which solves the above-described problem, includes a vehicle body floor direction inner region and an outer region of a cushion frame (for example, a cushion frame 2 in an embodiment described later) as a vehicle body floor (for example, a vehicle body in an embodiment described later). In the vehicle seat support structure to be supported on the floor 6), the upper end is coupled to the cushion frame side and the lower end is inclined downward inward in the vehicle width direction between the vehicle width direction outer region of the cushion frame and the vehicle body floor. A support body (for example, a frame member 10 in an embodiment described later) supported on the vehicle body floor is provided.
Accordingly, the side collision load is transmitted to the vehicle body floor by the support body that is inclined downward inward in the vehicle width direction.

According to a second aspect of the present invention, in the vehicle seat support structure according to the first aspect, the upper end is coupled to the seat rail between the seat rail that slides the cushion frame in the vehicle longitudinal direction and the vehicle body floor, and the lower end. A frame material (for example, a frame material 10 in an embodiment described later) supported by the vehicle body floor is provided so as to be inclined inward in the vehicle width direction, and this frame material is used as the support body.
As a result, the side collision load is transmitted to the vehicle body floor via the frame member and the seat rail support portion that incline downward in the vehicle width direction.

According to a third aspect of the present invention, in the vehicle seat support structure according to the first aspect, the support body includes a seat rail that slides the seat frame in the longitudinal direction of the vehicle body, and an attachment body of the seat rail (for example, , A pedestal 509 in an embodiment described later.
As a result, the side collision load is transmitted to the vehicle body floor via the seat rail inclined downward in the vehicle width direction and its support body.

  According to the first aspect of the present invention, since the side collision load can be transmitted to the vehicle body floor by the support body inclined downward in the vehicle width direction, the rigidity of the support portion of the cushion frame is high without causing buckling. Side collision load can be supported on the vehicle body floor.

  According to the second aspect of the present invention, since the side collision load is transmitted to the vehicle body floor through the frame material inclined downward in the vehicle width direction and the support portion of the seat rail, the side collision load is more quickly applied to the vehicle body floor. Can communicate.

  According to the invention described in claim 3, since the side collision load is transmitted to the vehicle body floor through the seat rail inclined downward in the vehicle width direction and its support body, the manufacturing cost is reduced and the weight is reduced by reducing the number of parts. Can be achieved.

Embodiments of the present invention will be described below with reference to the drawings. In each embodiment described below, the same portions are denoted by the same reference numerals, and a part of the description is omitted for the overlapping portions.
First, the first embodiment shown in FIGS. 1 and 2 will be described.
FIG. 1 is a front view of a skeleton portion of a vehicle seat 1 that employs a support structure according to the present invention. In FIG. 1, 2 is a cushion frame of a seat cushion that supports an occupant's buttocks, and 3 is an occupant's seat. It is a seat back frame of the seat back which supports a waist part and a back part. The vehicle seat 1 is a front seat side separate seat having a front / rear slide mechanism, and an outer region and an inner region in the vehicle width direction of the cushion frame 2 are supported by a vehicle body floor 6 via seat rails 4 and 5. ing. In the figure, 7 is a side sill disposed at the lower end of the side of the vehicle, and 8 is a side door on the front seat side.

  The seat rails 4 and 5 are respectively coupled to the lower rails 4a and 5a attached to the vehicle body floor 6 via the pedestal 9 and the left and right lower ends of the cushion frame 2, and are slidably engaged with the lower rails 4a and 5a in the longitudinal direction of the vehicle body. Upper rails 4b and 5b.

  On the inner side surface of the lower rail 4a on the outer side in the vehicle width direction, a prismatic frame material 10 (support) is provided so as to protrude obliquely downward inward in the vehicle width direction, while the frame material on the vehicle body floor 6 is projected. A load receiving bracket 11 is attached to a position facing the front end of 10. The frame material 10 is joined to the side surface of the lower rail 4a by welding, adhesion or the like. Further, as shown in FIG. 2, the load receiving bracket 11 is formed in a substantially L-shaped cross section, and one piece 11a is coupled to the upper surface of the vehicle body floor 6 by fastening, welding, bonding or the like with bolts 12, The other piece 11b rises substantially perpendicular to the vehicle body floor 6 so that the tip of the frame member 10 faces the base portion. In the case of this embodiment, a plurality of triangular ribs 13 are joined to both the pieces 11a, 11b of the load receiving bracket 11, and the ribs 13 improve the strength of the other piece 11b in the falling direction. The load receiving bracket 11 may be box-shaped, or the load receiving bracket 11 may be abolished so that the tip of the frame material 10 faces the uneven portion formed on the vehicle body floor 6. .

  In the above configuration, another vehicle collides with the side surface of the vehicle adopting the support structure according to the present invention, and the side collision load F causes the seat back frame 3 to move from the side door 8 or the center pillar (not shown). The load F is transmitted to the vehicle body floor 6 via the seat rails 4 and 5 and the pedestal 9 on the outer side and the inner side in the vehicle width direction, and the outer seat frame 4 (lower rail 4a). ) To the load receiving bracket 11 on the vehicle body floor 6 through the frame member 10 projecting obliquely downward toward the inner side in the vehicle width direction.

  As a result, the side collision load F is distributed to the path via the base 9 and the path via the frame member 10 and the load receiving bracket 11 without passing through the base 9, and is transmitted to the vehicle body floor 6. Since the frame material 10 is inclined downward toward the inner side in the vehicle body width direction, the side collision load F is input to the frame material 10 as a compressive load along the longitudinal direction. As a result, the frame material 10 functions to stretch between the seat rail 4 and the load receiving bracket 11 and the inward tilting (buckling) of the base 9 and the seat rail 4 in the vehicle width direction is restricted. The load F is reliably supported by the highly rigid vehicle body floor 6.

Therefore, according to the support structure for the vehicle seat 1, the buckling (falling) of the seat rail 4 and the pedestal 9 that are the support portions of the cushion frame 2 is regulated by the frame material 10, and the side collision load F is applied to the vehicle body floor 6. Therefore, the energy of the side collision can be efficiently absorbed by the highly rigid vehicle body floor 6 and the energy absorption amount of the entire vehicle body can be increased. In this support structure, the side collision load F can be reliably supported on the vehicle body floor 6, so that the structure is simpler and lighter than the structure in which the load receiving portion is provided on the inner side in the vehicle width direction of the seat 1. Can be advantageously advanced.
However, a load receiving portion that receives a load from the side portion of the cushion frame 2 may be added to the console box or the like on the inner side in the vehicle width direction of the seat 1 to further improve the collision energy absorption performance.

  In addition, the support structure for the vehicle seat 1 improves the absorbability of the side collision load F by providing the frame member 10 and the load receiving bracket 11 below the seat cushion. There is also an advantage that it does not cause pressure or sacrifice of rider comfort.

  In the implementation described above, the frame material 10 protruding from the seat rail 4 is formed in a prismatic shape, but the frame material 10 may be in a columnar shape. Further, in the above-described embodiment, the front end portion of the frame member 10 protruding from the seat rail 4 is opposed to the load receiving bracket 11 fixed to the vehicle body floor 6 side, but the second portion shown in FIG. As in this embodiment, a bent piece 15 may be provided at the tip of the frame member 10 protruding from the seat rail 4, and the bent piece 15 may be directly coupled to the vehicle body floor 6 by a bolt 16.

4 and 5 show a third embodiment of the present invention.
In the vehicle seat 201 according to this embodiment, prismatic frame members 10 and 20 that incline downward inward in the seat width direction project from the outer and inner seat rails 4 and 5 (lower rails 4a and 5a), respectively. The bent pieces 15 and 25 provided at the front ends of the frame members 10 and 20 are superposed on the vehicle body floor 6 and coupled to the vehicle body floor 6 by bolts 16 and 26.

  In the case of the vehicle seat 201, the side collision occurs when the frame material 10 is stretched between the seat rail 4 and the vehicle body floor 6 on the side of the seat rail 4 on the outer side in the vehicle width direction as in the first and second embodiments. Although the load is transmitted from the seat rail 4 to the vehicle body floor 6, the frame material 20 is pulled between the seat rail 5 and the vehicle body floor 6 as shown in FIG. Therefore, the fall of the seat rail 5 and the pedestal 9 is regulated.

  Therefore, in this vehicle seat 201, the fall regulation effect by the frame member 20 is also added, and the buckling of the vehicle seat 201 at the time of a side collision can be prevented more reliably.

  In this embodiment, the frame member 20 connected to the seat rail 5 on the vehicle width direction inner side and the vehicle body floor 6 is coupled by a prismatic member. However, as in the fourth embodiment shown in FIG. The material 320 may be constituted by a plate-like member. In the case of this example, the frame member 320 is provided with bent pieces 28 and 29 at both ends of the plate-like member, and the bent pieces 28 and 29 are coupled to the seat frame 5 and the vehicle body floor 6 by bolts 26.

  Further, as in the fifth embodiment shown in FIG. 7, the frame member 420 is constituted by two plate-like members 420A and 420B each having engagement flanges 30a and 30b that can be engaged with each other. May be. In this case, each plate-like member 420A, 420B is bolted at one end to the seat rail 5 and the vehicle body floor 6 and the engagement flanges 30a, 30b at the other end are arranged facing each other. When a load in the pulling direction is input to the locking flanges 30a and 30b, the locking flanges 30a and 30b are engaged with each other.

  This embodiment can basically obtain the same effects as those of the third and fourth embodiments. However, since the frame member 420 is composed of two plate-like members 420A and 420B, the seat rail 5 can be obtained. There is a further advantage that the mounting work to the vehicle body floor 6 becomes easy.

Next, a sixth embodiment of the present invention shown in FIG. 8 will be described.
In the vehicle seat 501 of this embodiment, the outer region and the inner region in the vehicle width direction of the cushion frame 2 are attached to the vehicle body floor 6 via seat rails 4 and 5 and a base 509 (attachment body). Each pedestal 509 that supports the seat rails 4 and 5 is inclined downward inward in the vehicle width direction and coupled to the vehicle body floor 6. When the side collision load F is input to the cushion frame 2 from the side door 8, the center pillar, or the like, the collision load F is transmitted to the vehicle body floor 6 via the seat rails 4 and 5 and the pedestal 509. In the seat 501, since the left and right pedestals 509 are inclined downward inward in the vehicle width direction, the inclination directions of the left and right pedestals 509 substantially coincide with the transmission direction of the side collision load F, and the pedestal 509 is inclined in the inclined direction. A compressive load comes to act along. Therefore, the side collision load F is promptly transmitted to the vehicle body floor 6 without buckling the pedestal 509, and the energy of the side collision is efficiently absorbed by the vehicle body floor 6 having high rigidity.

  Further, in the vehicle seat 501 of this embodiment, the buckling of the seat support portion can be prevented without adding a separate frame material or the like, so the manufacturing cost is reduced and the weight is reduced by reducing the number of parts. There is an advantage that can be achieved.

In the seventh embodiment shown in FIG. 8, only the pedestal 509 that supports the seat rails 4 and 5 is inclined downward inward in the vehicle width direction, but as in the seventh embodiment shown in FIG. The seat rails 4 and 5 (lower rails 4 a and 5 a and upper rails 4 b and 5 b) may also be inclined in the same direction as the base 509.
In the case of this embodiment, the side collision load F input to the seat 501A can be transmitted from the lower surface of the cushion frame 2 to the vehicle body floor 6 more straightly through the seat rails 4 and 5 and the pedestal 509.

FIG. 10 shows an eighth embodiment of the present invention.
The vehicle seat 601 of this embodiment is the sixth embodiment in that a base 609 (attachment body) that supports the seat rails 4 and 5 is formed in a trapezoidal shape having an inclined surface 609a inclined inward in the vehicle width direction. It is different from the form. In the case of this embodiment, the pedestal 609 does not incline downward in the vehicle width direction, but has an inclined surface 609 that inclines inward in the vehicle width direction, and therefore has a side collision load F without causing buckling. Can be promptly transmitted to the vehicle body floor 6. Further, in this embodiment, since the pedestal 609 is formed in a trapezoidal cross-sectional shape with a long lower side, the pedestal 609 is more unlikely to fall down or deform.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

The front view which shows the frame | skeleton of the vehicle seat of 1st Embodiment of this invention. The fragmentary sectional perspective view of the principal part of the embodiment. The fragmentary sectional perspective view of the principal part of 2nd Embodiment of this invention. The front view which shows the frame | skeleton of the vehicle seat of 3rd Embodiment of this invention. The fragmentary sectional perspective view of the principal part of the embodiment. The fragmentary sectional perspective view which shows 4th Embodiment of this invention. The fragmentary sectional perspective view which shows the 5th Embodiment of this invention. The front view which shows the frame | skeleton of the vehicle seat of 6th Embodiment of this invention. The front view which shows the frame | skeleton of the vehicle seat of 7th Embodiment of this invention. The front view which shows the frame | skeleton of the vehicle seat of 8th Embodiment of this invention.

Explanation of symbols

1, 201, 501, 601 ... Vehicle seat 2 ... Cushion frame 6 ... Vehicle body floor 9, 509, 609 ... Base (mounting body)
10 ... Frame material

Claims (3)

In the vehicle seat support structure in which the vehicle width direction inner region and outer region of the cushion frame are supported on the vehicle body floor,
A support body is provided between the outer region of the cushion frame in the vehicle width direction and the vehicle body floor, the upper end being coupled to the cushion frame side, and the lower end inclined downward inward in the vehicle width direction and supported by the vehicle body floor. A vehicle seat support structure.   Between the seat rail for sliding the cushion frame in the longitudinal direction of the vehicle body and the vehicle body floor, a frame material is provided with an upper end coupled to the seat rail and a lower end supported by the vehicle body floor so as to be inclined inward in the vehicle width direction. 2. The vehicle seat support structure according to claim 1, wherein a material is the support.   The vehicle seat support structure according to claim 1, wherein the support body is configured by a seat rail that slides the seat frame in a longitudinal direction of the vehicle body and an attachment body of the seat rail.

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