JP2017065358A - Vehicle seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat structure capable of securing a seat support rigidity without being provided with a reinforcement member such as a seat cushion pan even in a case where a layout requires an arrangement with a seat overhung on a recessed part such as a recess part to store a tire.SOLUTION: A vehicle seat structure comprises: a seat cushion 20 of rear seats 10 disposed in a vehicle 1, a front part of which is attached to a vehicle floor, whereas a rear part of which is attached to the vehicle floor through a support member 41; floating parts 6 arranged above a recessed tire storing part 3 formed in a rear floor panel 2, and not attached to the rear floor panel 2; an extension member 51 extending from the floating parts 6 to the front side of the vehicle and attached to the vehicle floor at a position beyond the recessed tire storing part 3; a seat back frame 31 of the rear seats 10, a lower part of which is attached to the vehicle floor through the floating parts 6; and suppression means S1, S2, T for suppressing a moment M, a direction of which is opposite to an extension direction of the extension member 51.SELECTED DRAWING: Figure 1

Description

  According to the present invention, a seat cushion of a seat provided in a vehicle has a front portion attached to the vehicle floor and a rear portion attached to the vehicle floor via a support member, and the support member is formed on the vehicle floor. The present invention relates to a vehicle seat structure having a floating portion that is located above a dug portion and cannot be attached to a vehicle floor, and a seat back frame of the seat is attached to the vehicle floor via the floating portion at a lower portion thereof.

  Conventionally, a vehicle including a seat of a type attached to a vehicle floor via a seat frame that supports a seat cushion from below is widely used. The seat frame of such a seat is composed of a strength member that extends in the vehicle width direction and the vehicle front-rear direction in order to ensure the support rigidity of the seat cushion. On the other hand, sedan and hatchback vehicles are also known that have a seat of a type in which a seat cushion is directly attached to the vehicle floor without using a seat frame in order to reduce the weight of the vehicle and save space in the vehicle. .

By the way, vehicles such as SUVs (Sport Utility Vehicles), minivans, and the like, in which a dug portion such as a tire accommodating recess for accommodating a spare tire is provided on the rear floor, are also widely used. Among the vehicles in which the digging portion is provided in such a rear floor, as exemplified in the rear body structure of the vehicle in Patent Document 1, the last row of seats arranged in the front-rear direction is provided. Some are overhanged above the dug.
Patent Document 1 discloses a configuration in which a T-shaped frame in plan view that overhangs above a tire-accommodating recess is provided, and the last row of sheets is supported by the T-shaped frame in plan view.

  However, when a seat without a seat frame as described above that supports the seat cushion from below is arranged so as to overhang above the digging portion, the seat mounting rigidity to the vehicle floor, particularly in the case of a rear impact There has been a problem in that the back has insufficient rigidity for mounting the seat to the vehicle floor against a backward moment generated in the direction in which the seat back is moved backward.

  Patent Document 1 described above does not describe any description focusing on such a problem or a specific configuration for supporting a seat on which a backward moment acts, and further studies on the above problem. Was necessary.

JP 2002-274440 A

  In view of this, the present invention provides seat support rigidity without a reinforcing member such as a seat cushion pan or a seat cushion frame, even in a seat that is arranged to overhang in a recessed portion such as a tire accommodating recess. It aims at securing.

  According to the present invention, a seat cushion of a seat provided in a vehicle has a front portion attached to the vehicle floor and a rear portion attached to the vehicle floor via a support member. To the vehicle floor that is located above the dug portion formed on the vehicle floor and cannot be attached to the vehicle floor, and extends from the levitated portion in the vehicle front-rear direction and beyond the dug portion. An extending member to be attached is provided, and the seat back frame of the seat is attached to the vehicle floor via the floating portion at a lower portion thereof, and a moment in a direction opposite to the extending direction of the extending member is applied. The suppression means to suppress is provided.

  According to the above configuration, even if the seat is arranged so as to overhang in a recessed portion such as a tire accommodating recess, the seat support is provided without arranging a reinforcing member such as a seat cushion pan or a seat cushion frame. Rigidity (particularly, rigidity against a backward tilting moment acting on the seatback frame of the seat in the direction in which the seatback frame is tilted backward) can be ensured.

  As an aspect of the present invention, the extended member is joined on the front surface of the support member.

  According to the above configuration, even if a backward tilting moment is applied to the seat back frame of the seat, it is possible to prevent the support member from rotating together with the seat back frame and to support the seat back frame. Rigidity can be ensured.

  As an aspect of the present invention, the extended member is joined on the lower surface of the support member.

  According to the above configuration, when a backward tilting moment acts on the seat back frame of the seat, the backward tilting moment acts so that the extended member and the lower surface of the support member come into stronger contact with each other. The support member can be effectively prevented from rotating, and the support rigidity of the seat back frame can be ensured.

  As another aspect of the present invention, the other end of the extending member is connected by a vertical surface of the vehicle floor.

  According to the above-described configuration, the other end of the extending member does not come off the vehicle floor even when a rearward moment is generated in the seatback frame of the seat at the time of a rear collision. The seat back frame can be supported.

  According to the present invention, the seat support is provided without arranging a reinforcing member such as a seat cushion pan or a seat cushion frame, even in a seat that is arranged to overhang in a dug portion such as a tire-accommodating concave portion on the layout. Rigidity can be ensured.

The perspective view which looked at the principal part of the vehicles of this example from the left diagonal front side upper part inside the car 1 is a central longitudinal sectional perspective view in the vehicle width direction in FIG. A perspective cross-sectional view of the joint between the extending member and the support frame as viewed from diagonally upward on the front left A perspective cross-sectional view of the joint between the extending member and the support frame as seen from the rear left and above. A perspective cross-sectional view of the rear lower part of the center of the pair of rear seats in the vehicle width direction as seen obliquely from the lower left A perspective cross-sectional view of the front lower part in the center in the vehicle width direction of the pair of seat body structures as seen from the upper left side A perspective sectional view showing a structure for attaching the front end portion of the seat cushion to the vehicle floor

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show the vehicle body structure of the vehicle of this embodiment, and FIG. 1 is a view of the main part of a pair of left and right rear seats provided on the left and right sides of the last row of the vehicle of this embodiment, viewed from diagonally upward on the front left side inside the vehicle. FIG. 2 is a perspective view of the central longitudinal section in the vehicle width direction in FIG. 1 and 2 show a frame structure of a pair of left and right rear seats while omitting the illustration of the seat cushion.

  In the following embodiments, in the drawings, arrow F indicates the front of the vehicle, arrow LE indicates the left in the vehicle width direction, arrow RI indicates the right in the vehicle width direction, and arrow U indicates the upper side of the vehicle.

  As shown in FIGS. 1 and 2, a rear floor panel 2 (a part of the floor panel) that forms the floor surface of the vehicle body is provided at the rear portion of the vehicle 1 of the present embodiment. The rear floor panel 2 is provided with a tire housing recess 3 at the rear and in the center in the vehicle width direction. The bottom surface and the outer peripheral wall surface of the tire housing recess 3 are formed integrally or integrally with the rear floor panel 2 in a concave shape.

  As shown in FIGS. 1 and 2, a rear side frame upper 4 a formed in a cross-sectional hat shape is joined to the upper side portion of the rear floor panel 2, and a cross-sectional hat shape is formed below the side portion of the rear floor panel 2. A closed cross section extending in the front-rear direction of the vehicle 1 is joined between the rear floor panel 2 and the rear side frame upper 4a, and between the rear floor panel 2 and the rear side frame lower. Respectively.

  As shown in the figure, a rear cross member 5 (so-called No. 4 cross member) is provided on the front side of the tire housing recess 3, and the upper rear cross is located above the rear floor panel 2 of the rear cross member 5. A member 5a is provided, and a lower rear cross member 5b is provided below the rear floor panel 2 of the rear cross member 5. The upper rear cross member 5a and the lower rear cross member 5b (see FIG. 2) Also extending in the vehicle width direction and formed in a hat shape in sectional view. A closed cross section extending in the vehicle width direction is formed between the rear floor panel 2 and the upper rear cross member 5a and between the rear floor panel 2 and the lower rear cross member 5b (see FIG. 2). . The upper rear cross member 5a supports the front end portion of the rear seat 10 arranged in the last row, which will be described later.

As shown in FIG. 1, in the last row (the third row in this embodiment) of a plurality of seats arranged in front and rear, as shown in FIG. A pair of left and right rear seats 10R and 10L each including a rear seat 10R (referred to as “right rear seat 10R”) and a rear seat 10L for left rear seat passengers (referred to as “left rear seat 10L”) are provided.
Note that the right rear seat 10R and the left rear seat 10L have the same configuration as each other, and therefore each will be described as the rear seat 10 except for the case where they are distinguished from each other.

  As shown in FIGS. 1 and 2, the rear seat 10 mainly includes a seat cushion 20 (see FIG. 7) that forms a seating surface of a rear seat occupant as a rear seat structure of the vehicle 1, and a rear seat occupant provided with a headrest 35. The seat back 30 that forms the backrest surface, the reclining device 60, and the seat support structure 40 that supports them are provided.

  The seatback 30 includes a substantially rectangular seatback frame 31 made of a metal pipe material, a pair of left and right rotation support brackets 32 attached to the lower portions of the left and right ends of the seatback frame 31, and the whole of these. A cushioning material (not shown) is provided.

  Although not shown, the seat cushion 20 is integrally formed in a substantially rectangular shape in a plan view, and a cushion spring is disposed on the outer periphery, and as shown in FIG. A low-rigidity portion 20A excellent in flexibility) and a cushion foam portion 20B made of urethane foam, which is disposed mainly below the low-rigidity portion 20A and is configured to have higher rigidity than the low-rigidity portion 20A. These surfaces are covered with a cushion cover (not shown).

As shown in FIGS. 1, 2, and 7, the front end portion of the seat cushion 20 is attached to the upper surface 5U of the upper rear cross member 5a by a front cushion attachment device 21. The front cushion mounting device 21 engages the striker 22 with an upper rear cross member 5a corresponding to the striker 22 that protrudes downward from an intermediate portion of the front end portion of the seat cushion 20 in the vehicle width direction. The latch 23 (resin clip) is provided, and the latch 23 is provided with an operation portion 24 for releasing the engagement of the striker 22 by the latch 23.
7 is a perspective cross-sectional view of the periphery of the front cushion mounting device 21 as viewed obliquely from the upper left with respect to an orthogonal cross section in the vehicle width direction at a portion corresponding to the middle portion of the front cushion mounting device 21 in the vehicle width direction. It is.

  As shown in FIGS. 1 and 2, the reclining device 60 has left and right outer sides of a rear end of an extended member 51, which will be described later, at the lower rear end of the pair of left and right rear seats 10R and 10L and in the middle in the vehicle width direction. A pair of rear seats 10R, 10L are provided corresponding to each of the rear seats 10R and 10L. A shaft for pivotally supporting a rotation support bracket 32 provided on the inner side in the vehicle width direction of the seat back 30 around the vehicle width direction is provided above the reclining device 60. A branch 60A is provided. In FIG. 1, only the shaft support 60A of the left rear seat 10L is illustrated.

  Although not shown in the drawings, the reclining device 60 includes a mainspring spring that urges the seat back 30 to pivot forward (counterclockwise in the left side view of the vehicle 1) around the shaft support 60A, and the seat back 30. And a lock mechanism for locking the posture. The locking mechanism includes a locked portion such as a ratchet and a locking claw that can be engaged and disengaged with the locked portion. The locking mechanism functions when the seat back 30 is in the standing posture and holds the seat back 30 in the standing posture.

  As shown in FIGS. 1 and 2, the seat support structure 40 includes a support bracket 26, a support member 41, an extending member 51, a vehicle width direction outer side support bracket 65, an upper connection bracket 42, and a lower connection bracket. 45 etc.

  The support member 41 is arranged in the vehicle width direction (horizontal and straight) over the substantially entire length in the vehicle width direction of the rear seats 10R and 10L at the lower rear end of the pair of left and right rear seats 10R and 10L, that is, the rear end of the seat support structure 40 Both ends of the square pipes are bolts and nuts (not shown) on the rear side frame upper 4a via vehicle width direction outer side support brackets 65 that are provided on the outer sides of the pair of left and right rear seats 10R, 10L in the vehicle width direction. It is attached by fastening (not shown) and mainly supports the rear portion of the rear seat 10 (see FIGS. 1 and 2).

  Specifically, as shown in FIGS. 1 and 2, the vehicle width direction outer side support bracket 65 includes a support member mounting portion 65a for supporting the support member 41 from the vehicle width direction outer side, and the support member mounting portion 65a. A shaft support portion 65b that is provided on the outer side in the vehicle width direction and supports the rotation support bracket 32 provided on the outer side in the vehicle width direction of the seat back 30 around the vehicle width direction.

  The support member 41 is positioned above the tire accommodating recess 3 formed in the rear floor panel 2 and is horizontally mounted so as to straddle the tire accommodating recess 3 in the vehicle width direction (see FIGS. 1 and 2). Therefore, at least an intermediate portion of the support member 41 in the vehicle width direction, specifically, a portion between the vehicle width direction outer support brackets 65, 65 on both sides in the vehicle width direction is located above the tire accommodating recess 3, and this The support member 41 has a floating portion 6 between the outer support brackets 65 and 65 in the vehicle width direction, which is not attached to the vehicle bottom surface formed by the rear floor panel 2 or the like (see the same figure).

  And the rear part of the seat cushion 20 is supported by the floating part 6 of the support member 41 mentioned later via the support bracket 26 formed by bending-deforming a metal wire. Thereby, the seat cushion 20 is disposed so as to overhang the tire accommodating recess 3 in terms of layout. Note that the above-described upper connection bracket 42, lower connection bracket 45, and reclining device 60 are also provided in the floating portion 6 of the support member 41.

  As shown in FIGS. 1 and 2, the extended member 51 is attached at its rear end to a vehicle width direction intermediate portion (an intermediate portion in the longitudinal direction of the support member 41) in the floating portion 6 of the support member 41. The front end (front flange portion 53 to be described later) is attached to the upper rear cross member 5a so as to extend linearly from the vehicle forward to beyond the tire receiving recess 3. That is, the extending member 51 extends substantially horizontally in the front-rear direction at the lower part of the pair of left and right rear seats 10R, 10L and in the intermediate part in the vehicle width direction.

  The extending member 51 includes an extending member main body 52 that extends substantially linearly from the floating portion 6 to the front of the vehicle 1, and a front flange portion 53 that is provided in front of the extending member main body 52 and is attached to the upper rear cross member 5a. (See the figure).

  3 is an enlarged perspective cross-sectional view showing a joint portion between the extending member and the support frame in FIG. 2, and FIG. 4 is slightly more than the cross-section orthogonal to the vehicle width direction shown in FIG. It is the perspective sectional view seen from the back left slanting lower part to the orthogonal cross section on the left side. FIG. 5 is a perspective cross-sectional view of the lower rear end in the center in the vehicle width direction of the pair of rear seats as viewed from diagonally below left.

  As shown in FIGS. 1 to 4, the extended member main body 52 has a closed cross-sectional structure as a whole except for the rear part in the front-rear direction, and as shown in FIGS. 3 and 4, The side wall is formed with a bulging portion 55 at the rear portion of the left and right side walls so that the rear portion gradually bulges upward toward the rear, and an opening is formed above the bulging portion 55. 54. As shown in FIGS. 1 and 5, reclining devices 60 provided on the pair of left and right rear seats 10R and 10L are disposed on both outer sides in the vehicle width direction of the bulging portion 55, and the bulging portion 55 includes a reclining device. The lower part of the reclining device support bracket 61 provided inside 60 in the vehicle width direction is fastened with bolts B and nuts N (see FIGS. 3 to 5).

  As shown in FIGS. 1 to 5, an upper connection bracket 42 is attached to the rear upper part of the extended member main body 52 so as to connect the opening 54 provided in the upper part so as to straddle in the front-rear direction.

  Specifically, as shown in FIGS. 3, 4, and 5, the upper connection bracket 42 includes an upper surface 421, a front extending piece 422 that extends downward from the front end of the upper surface 421, and a downward direction from the rear end. And a rear-side extending piece 424 that extends in the vehicle width direction and has a substantially U-shape in a side view that opens downward, and the front-side extending piece 422 is formed on the extending member main body 52. The rear extension piece 424 is joined to the rear edge of the opening 54 at the rear upper part of the extended member main body 52 while being joined to the front edge of the opening 54 at the rear upper part.

  As shown in FIG. 3, reclining mounting flanges 423 are formed on the left and right outer edges of the front flange portion 53 of the upper connection bracket 42 in the vehicle width direction (only the left reclining mounting flange 423 is shown in FIG. 3). The reclining attachment flange 423 is joined to a reclining device support bracket 61 provided in the reclining device 60 by welding. With the above configuration, the upper connecting bracket 42 supports the reclining devices 60 on the left and right sides from the inner side in the vehicle width direction.

Further, as shown in FIGS. 1 and 2, the rear lower portion of the extending member 51 is joined to the intermediate portion in the vehicle width direction of the floating portion 6 of the support member 41 extending in the vehicle width direction. The support member 41 constitutes a substantially T-shaped frame in plan view.
Specifically, as shown in FIGS. 3 and 4, the rear lower portion of the extending member 51 is cut out in a size and shape corresponding to a cross section orthogonal to the longitudinal direction of the support member 41. A relief portion 56 is formed, and the relief portion 56 has a support member abutting edge portion 57 that abuts against the upper surface 41U of the support member 41 and the front surface 41F along the edge portion (FIG. 3, FIG. 3). 4). The support member abutting edge portion 57 includes a support member upper surface abutting edge portion 58 that extends in the forward direction from the rear end so as to correspond to the upper end edge portion of the escape portion 56 so as to be able to abut on the upper surface 41U of the support member 41, and a support member A support member front surface contact edge portion 59 (see FIG. 3) extending upward from the lower end so as to correspond to the front end edge portion of the escape portion 56 so as to be able to contact the front surface 41F of the member 41 is provided.

  Further, the support member front surface abutting edge portion 59 extends in the vehicle width direction at the lower end of the extending member 51 and the vertical front surface abutting edge portion 59a extending upward from the lower end on both sides of the extending member 51 in the vehicle width direction. It has the width direction front surface contact edge part 59b (refer FIG. 3).

  As shown in FIGS. 3 and 4, the extended member 51 is arranged such that the support member upper surface contact edge 58 is pressed against the upper surface 41U of the support member 41, and the support member front surface contact edge. The portions 59 are disposed so as to press against the front surface 41F of the support member 41, and are joined by welding.

  In this embodiment, with respect to the joining of the support member front contact edge 59 and the front surface 41F of the support member 41, the vertical front contact edge 59a and the width front contact edge in the support member front contact edge 59 are provided. Both of the portions 59b are joined to the front surface 41F of the support member 41 by welding.

  3, 4, and 5, the support member abutting edge 57 of the extension member 51 is extended in a state where it is joined to the upper surface 41U and the front surface 41F of the support member 41 as described above. The rear surface 51R of the existing member 51 and the rear surface 41R of the support member 41 are substantially flush, and the lower surface 51D of the extended member 51 and the lower surface 41D of the support member 41 are substantially flush.

  Further, as shown in FIGS. 3 to 5, the support member at the joint portion between the extension member 51 and the support member 41 (the rear end portion of the extension member 51 and the intermediate portion of the support member 41 in the vehicle width direction). 41 and the extended member 51 are attached with the above-described lower connecting bracket 45 for connecting the members 41 and 51 so as to be held from below and behind.

  The lower connecting bracket 45 is formed in a substantially L shape in a side view by a front extending piece 451 extending forward and an upper extending piece 452 extending substantially upward. The lower surface 41D of the support member 41 and the lower surface 51D of the extension member 51 are joined by welding from below, and the upper extension piece 452 is attached to the rear surface 41R of the support member 41 and the rear surface 51R of the extension member 51. They are joined by welding from the rear side (see the figure).

  A bead 453 that protrudes outward in the thickness direction (below the front extending piece 451 and behind the upper extending piece 452) is provided at an intermediate portion of the lower connecting bracket 45 in the vehicle width direction.

  The bead 453 is also provided at a corner portion (a connecting portion between the front extension piece 451 and the upper extension piece 452) of the lower connection bracket 45 having a substantially L shape in side view, and extends upward from the front extension piece 451. The strength of the lower connection bracket 45 is increased by continuously extending from the respective base end portions of the pieces 452 to the front end side (see the same figure).

  As shown in FIGS. 3 to 5, the extending member main body 52 described above includes an extending member main body right side member 52 </ b> R corresponding to a substantially right half half divided into approximately two equal parts on the left and right sides in the vehicle width direction, The extended member main body left side member 52L substantially corresponds to the left half.

  As shown in FIGS. 2 to 4, upper side edge portions excluding the opening portion 54 and the escape portion 56 on the rear side are formed on the side surfaces of the extended member main body right side member 52 </ b> R and the extended member main body left side member 52 </ b> L. The flanges 52Ra and 52La are formed so as to project inward in the vehicle width direction from the lower edge and the rear edge, so that substantially the whole except for the rear part in the front-rear direction has a substantially U-shaped cross section in the front-rear direction. Is formed.

  The extended member main body right side member 52R and the extended member main body left side member 52L are such that one of the members is overlapped with the other member so as to overlap in the thickness direction when the flanges 52Ra and 52La are brought into contact with each other. In comparison, the flange interval is slightly increased. In this embodiment, the distance between the flanges 52La and 52La of the extended member main body left side member 52L is formed slightly larger than the distance between the flanges 52Ra and 52Ra of the extended member main body right side member 52R (FIGS. 3 to 3). 5).

  Thereby, the extended member main body right side member 52R and the extended member main body left side member 52L are arranged so as to face each other with the opening side having a U-shaped cross section facing the inner side in the vehicle width direction. The flanges 52Ra and 52La are overlapped with each other in the thickness direction, and the above-mentioned extending member main body 52 having a closed cross section extending in the front-rear direction is formed by joining the overlapping portions together by welding.

  Here, the lower connecting bracket 45 described above is attached so as to hold the support member 41 and the extending member 51 as described above. At this time, the flanges 52Ra and 52La provided at the center in the vehicle width direction of the extending member 51 are connected to each other. The bead 453 is disposed so as to straddle the overlapping portion of the lower connecting bracket 45, and the right side portion in the vehicle width direction is joined to the extending member main body right side member 52R with respect to the bead 453 of the lower connection bracket 45. The left side portion is mainly joined to the extended member main body left side member 52L.

  FIG. 6 is a perspective cross-sectional view of the joint portion between the front end portion of the extending member and the upper cross member as viewed obliquely from the upper left front side. As shown in FIG. 6, the above-described front flange portion 53 provided at the front end portion of the extending member 51 is joined to the front portion of the extending member main body 52 by welding at the lower surface of the rear portion and both left and right side surfaces. A cross member upper surface contact surface portion 53U in which a front portion of the front flange portion 53 is in contact with an upper surface 5U of the upper rear cross member 5a, and an upper rear cross member 5a from the front end of the cross member upper surface contact surface portion 53U. And a cross member front surface abutting surface portion 53F extending downward from the bent portion and contacting the front surface 5F of the upper rear cross member 5a. .

  The cross member upper surface contact surface portion 53U and the upper surface 5U of the upper rear cross member 5a, and the cross member front surface contact surface portion 53F and the front surface 5F of the upper rear cross member 5a are joined by welding, and further, the cross member front surface contact surface portion 53F. And the front surface 5F of the upper rear cross member 5a are joined to each other by fastening bolts B and nuts N (see FIGS. 1, 2, and 6).

  As shown in FIGS. 1 and 2, the seat structure of the vehicle 1 according to the present embodiment described above includes a seat cushion 20 (see FIG. 7) in the rear seat 10 among seats provided in the vehicle 1, and a front portion of the seat cushion 20. Is attached to the rear side frame upper 4a as a vehicle floor via a support member 41, and the support member 41 is attached to the rear side frame upper 4a at both ends thereof. In addition, there is a floating portion 6 that is positioned above a tire accommodating recess 3 as a dug portion formed in the rear floor panel 2 and is not attached to the rear floor panel 2, and extends in the vehicle front direction from the floating portion 6 to accommodate the tire. An extending member 51 that is attached to the upper rear cross member 5a beyond the recess 3 is provided. When the seat back frame 31 of the seat 10 is attached to the rear side frame upper 4a via the floating portion 6 at the lower part, a moment in the direction opposite to the extending direction (forward direction) of the extending member 51, that is, As will be described later in detail as a restraining means for suppressing the clockwise moment as viewed from the left side of the vehicle as indicated by an arrow M in FIG. 2, a joint S1 between the extending member 51 and the front surface 41F of the support member 41 (FIG. 3). (See FIG. 4 and FIG. 5), as well as the cross member front abutment surface portion 53F and the upper rear cross member 5a between the extended member 51 and the lower surface 41D of the support member 41 via the lower connection bracket 45. A fastening portion T (see FIG. 6) with the front surface 5F is provided (see FIGS. 1 to 6).

  According to the above configuration, even if the rear seat 10 is arranged so as to overhang the tire accommodating recess 3 in terms of layout, the support rigidity of the rear seat 10 is not provided without providing a reinforcing member such as a seat cushion pan or a seat cushion frame. In particular, the rearward tilting moment M acting on the seatback frame 31 of the rear seat 10 in the direction in which the seatback frame 31 is tilted backward at the time of a rear collision (a moment indicated by an arrow M in FIG. 2). The influence by can be suppressed.

  Further, even if the rear seat 10 is arranged so as to overhang the tire accommodating recess 3 in terms of layout, the reinforcing member such as the seat cushion pan and the seat cushion frame and the support member that supports the floating portion 6 are used as described above. Since the support rigidity of the rear seat 10 can be ensured without being provided in the housing recess 3, a spare tire housing space can be secured in the tire housing recess 3.

  According to the aspect of the present invention, the extending member 51 is joined at the front surface 41F of the support member 41 (see FIGS. 1, 2, and 3).

  That is, according to the present embodiment, the support member front surface contact edge portion 59 (vertical front surface contact edge portion 59a and width direction front contact edge portion 59b) of the extending member 51 is the front front surface 41F of the support member 41. Even if a backward tilting moment M acts on the seat back frame 31 of the rear seat 10 such as at the time of a rear collision, the support member is joined together by welding to the support member (see the joining portion S1 in FIG. 3). 41 can be received by the extending member 51 so as not to rotate, and the support rigidity of the seat back frame 31 can be ensured.

  In addition, according to this embodiment, the support member upper surface abutting edge portion 58 of the extended member 51 is welded to the upper surface 41U of the support member 41 (see the same figure), so that the extension member 51 and the support member 41 are The integrity is improved, and the support rigidity of the seat back frame 31 can be further increased even if the joint portion between the extending member 51 and the support member 41 is located at the floating portion 6.

  Moreover, according to the aspect of this invention, the extending member 51 is joined by the lower surface 41D of the support member 41 (refer FIG. 4, FIG. 5).

  That is, in the present embodiment, the extension member is joined by holding the support member 41 and the extension member 51 from the lower side by the lower connection bracket 45 (see the junction part S2 in FIGS. 4 and 5). 51 is joined to the lower surface 41D of the support member 41 via the lower connection bracket 45.

  According to the above configuration, when the backward tilting moment M acts on the seat back frame 31 of the rear seat 10, the backward tilting moment M causes the extending member 51 and the lower surface 41 </ b> D of the support member 41 to come into stronger contact with each other. Therefore, the support member 41 can be effectively prevented from rotating and the influence of the backward tilting moment M can be suppressed.

  In the present embodiment, the extended member 51 is directly or indirectly via the lower connecting bracket 45, and each surface of the front surface 41F, the rear surface 41R, the upper surface 41U, and the lower surface 41D of the support member 41, that is, the support member. Since it is joined to the whole circumference of 41, the support rigidity of seat back frame 31 can be secured more (refer to Drawing 3-Drawing 5).

  Further, according to the aspect of the present invention, the front end portion of the extending member 51 is connected by the front surface 5F extending in the vertical direction in the upper rear cross member 5a as the vehicle floor.

  That is, in the present embodiment, a front flange portion 53 is provided at the front end portion of the extending member 51, and the cross member front contact surface portion 53F provided in the front flange portion 53 is arranged in the vertical direction of the upper rear cross member 5a. It is welded to the extending front surface 5F and connected by fastening bolts B and nuts N (see FIGS. 2 and 6).

  According to the above configuration, the front end portion (front flange) of the extending member 51 is generated even when a rearward moment M is generated in the seatback frame 31 of the rear seat 10 when the seatback frame 31 tends to tilt backward in the case of a rear collision. The seat back frame 31 can be supported without the portion 53) being detached from the upper rear cross member 5a.

  Further, as described above, the cross member front surface contact surface portion 53F at the front end of the extending member 51 is connected to the front surface 5F of the upper rear cross member 5a by fastening bolts B and nuts N, so that the rear seat can be used at the time of a rear collision. Even if a rearward moment M occurs when the seatback frame 31 is inclined backward, the load acting on the front end portion of the extending member 51 acts in the shear direction of the bolt B. Therefore, the backward tilting moment M can be firmly received and supported particularly at the connecting portion between the cross member front surface contact surface portion 53F of the extending member 51 and the front surface 5F of the upper rear cross member 5a.

In the correspondence between the configuration of the present invention and the above-described embodiment, the vehicle floor corresponds to the upper rear cross member 5a, the rear side frame upper 4a, and the rear floor panel 2, and similarly,
The seat corresponds to the rear seat 10,
The digging portion corresponds to the tire receiving recess 3,
The extending direction of the extending member corresponds to the front direction of the vehicle,
The other end portion of the extending member corresponds to the cross member front surface contact surface portion 53F (the front end portion of the extending member 51),
The vertical surface of the vehicle floor corresponds to the front surface 5F of the upper rear cross member 5a,
The suppressing means includes a joint portion S1 between the extended member 51 and the front surface 41F of the support member 41, a joint portion S2 between the extended member 51 and the lower surface 41D of the support member 41 via the lower connection bracket 45, and a cross member front contact. Although it corresponds to the fastening portion T between the contact surface portion 53F and the front surface 5F of the upper rear cross member 5a, the present invention is not limited to the configuration of the above-described embodiment.

  For example, in this embodiment, as described above, the support member front surface contact edge portion 59 of the extended member 51 and the front surface 41F of the support member 41 are vertically aligned with respect to the support member front surface contact edge portion 59 of the extension member 51. Since both the direction front contact edge 59a and the width front contact edge 59b are welded to the front surface of the support member 41 (see FIG. 3), the seat back frame 31 acts in a backward tilting direction. Although it is preferable from the viewpoint of improving the support rigidity with respect to the backward tilting moment M, the present invention is not limited to this configuration.

  Specifically, according to the present invention, at least one of the vertical front contact edge 59a in the vertical front contact edge 59a and the width front contact edge 59b of the support member front contact edge 59 is the support member. The structure welded to the front surface 41F of 41 should just be sufficient, and the structure welded to the front surface 41F of the support member 41 only by the up-down direction front surface contact edge part 59a is not excluded.

  In the above-described embodiment, the rear floor panel 2 is interposed between the rear side frame upper 4a and the rear side frame lower (not shown), or the rear floor is interposed between the upper rear cross member 5a and the lower rear cross member 5b. Although the panel 2 is interposed, the present invention is not limited to the structure in which the rear floor panel 2 is interposed as described above. That is, in the present invention, the rear floor panel 2 can be provided between the rear side frame upper 4a and the rear side frame lower or between the upper rear cross member 5a and the lower rear cross member 5b as long as the load can be distributed from the rear seat 10. The structure which is not interposed may be sufficient.

  Furthermore, in the present embodiment, the tire accommodating recess 3 is formed on the rear side of the rear floor panel 2, but the recess formed on the rear side of the rear floor panel 2 is not limited to the tire accommodating recess 3, but is a load other than the tire. It may be a concave part that accommodates.

  As described above, according to the present invention, the seat cushion of the seat provided in the vehicle has a front portion attached to the vehicle floor and a rear portion attached to the vehicle floor via the support member. It has a floating part which is located above the dug part formed in the vehicle floor and cannot be attached to the vehicle floor, and the seat back frame of the seat is attached to the vehicle floor via the floating part at the lower part. This is useful for a vehicle seat structure.

2 ... Rear floor panel (vehicle floor)
4a ... Rear side frame upper (vehicle floor)
5a: Upper rear cross member (vehicle floor)
10 ... Rear seat (seat)
20 ... Seat cushion 3 ... Tire housing recess (digging part)
5F: Front of upper rear cross member (vertical surface of vehicle floor)
6 ... floating part 31 ... seat back frame 41 ... support member 41F ... front surface 41D of support member ... lower surface 51 of support member ... extended member 53F ... cross member front surface abutting surface (the other end of the extended member)
59... Support member front surface abutting edge S1, S2...
T ... Fastening part (suppression means)

Claims (4)

A seat cushion of a seat provided in the vehicle has a front portion attached to the vehicle floor and a rear portion attached to the vehicle floor via a support member,
The support member is attached to the vehicle floor at both ends thereof, and has a floating portion that is located above the dug portion formed on the vehicle floor and cannot be attached to the vehicle floor.
An extending member attached to the vehicle floor extending in the vehicle front-rear direction from the floating portion and exceeding the dug portion is provided,
The seat back frame of the seat is attached to the vehicle floor at the lower part via the floating part,
A vehicle seat structure provided with suppression means for suppressing a moment in a direction opposite to the extending direction of the extending member. The vehicle seat structure according to claim 1, wherein the extending member is joined to the front surface of the support member. The vehicle seat structure according to claim 1, wherein the extended member is joined to a lower surface of the support member. The vehicle seat structure according to any one of claims 1 to 3, wherein the other end of the extending member is connected by a vertical surface of a vehicle floor.

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