JP5374927B2 - Folding seat - Google Patents

Description

  The present invention relates to a foldable seat, and more particularly to a technique for reducing input to a seat frame from a seat belt.

  In a foldable seat that is foldable so that the vehicle seat can be freely engaged with and disengaged from a striker fixed to the floor, the seat belt anchor is positioned at the tip opposite to the base end that is engaged with and disengaged from the striker on the rear leg of the vehicle. The technique attached to the bracket board fixed to the seat frame provided in the part upper position is disclosed (for example, refer patent document 1 etc.).

In the technique described in Patent Document 1, when a tension is generated in the seat belt due to an input load from the front or rear of the vehicle, the load input to the seat belt anchor is transmitted to the striker via the bracket plate and the rear leg. I try to let them.
Japanese Patent No. 3989709

  However, in the technique described in Patent Document 1, since the distance from the portion where the seat belt anchor is attached to the striker is long, the strength that the seat frame can sufficiently withstand the load input to the seat belt anchor is required. It is done.

  Therefore, it is necessary to increase the thickness of the seat frame constituent member or increase the constituent member in order to increase the rigidity of the seat frame. By doing so, in Patent Document 1, the structure of the seat frame becomes complicated and the weight increases.

  Therefore, an object of the present invention is to provide a foldable seat that can reduce the weight of the seat frame itself by reducing a large load acting on the seat frame by a load input to the seat belt anchor.

In the foldable seat of the present invention, a seat belt anchor is provided on a rear leg that can be freely engaged with and disengaged from a striker fixed to a vehicle floor. The rear leg includes a first plate member, a second plate member coupled to the first plate member so as to form a closed cross section, and an internal space formed by the first plate member and the second plate member. And a reinforcing plate member provided in almost the entire region. And the attachment position with respect to the rear leg of the seat belt anchor is the vicinity of the engagement / disengagement position with the striker, and the seat frame is provided in the vicinity of the pivot point of the rear leg that is pivotally attached to the seat frame. A leg rotation preventing portion that contacts the stopper pin and prevents the rear leg from rotating is provided.

According to the foldable seat of the present invention, since the seat belt anchor is attached to the rear leg, the load input to the seat belt anchor is not directly applied to the seat frame, but is transmitted to the striker fixed to the vehicle floor. Can be made. Therefore, according to the present invention, it is not necessary to increase the thickness of the seat frame constituent member or increase the constituent member in order to increase the strength of the seat frame, and the weight of the seat frame itself can be reduced. Further, according to the present invention, since the attachment position to the rear leg of the seat belt anchor is the vicinity of the engagement / disengagement position with the striker, the load applied to the seat belt anchor is the vehicle in the vicinity of the seat belt anchor on which the load acts. Can be transmitted to the floor. Therefore, the input load on the rear leg can be reduced. Further, according to the present invention, the rear leg is combined with the first plate member and the second plate member so as to form a closed cross section, and the reinforcing plate member is provided in almost the entire region of the internal space. As a result, the mechanical strength of the rear leg can be increased. Further, according to the present invention, the leg rotation preventing portion that contacts the stopper pin provided on the seat frame and prevents the rotation of the rear leg is provided in the vicinity of the rotation fulcrum shaft of the rear leg. The distance between the pivot fulcrum shaft and the leg rotation preventing portion is shortened, the moment acting on the rear leg due to the load input from the vehicle front-rear direction can be reduced, and the load applied to the rear leg is reduced. Can

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  1 is a perspective view of a foldable seat according to the present embodiment, FIG. 2 is a perspective view of the foldable seat of FIG. 1 when viewed from the bottom, and FIG. 3 is a side view of the foldable seat attached to a vehicle floor. 4 is an exploded perspective view of a rear leg of the foldable sheet of FIG.

  In FIGS. 1 and 2, the seat cushion and the seat back are not shown. In FIG. 1, the arrow FR indicates the front of the vehicle, the arrow RR indicates the rear of the vehicle, the arrow X indicates the vehicle width direction, and the arrow Z indicates the vehicle height direction.

  The foldable seat 1 of this embodiment is a three-seater rear seat, and has a structure in which a one-person foldable seat 2 and a two-person foldable seat 3 are connected. In this embodiment, since both sheets have basically the same configuration, the present invention will be described by taking a folding seat 3 for two persons as an example.

  As shown in FIGS. 1 to 3, the two-person foldable seat 3 is attached to the front of the seat frame 6 to which the seat cushion 4 and the seat back 5 are attached, and fixed to the vehicle floor 7. The front leg 8 is attached to the rear frame 10 and the rear leg 10, which is pivotably attached to the rear of the seat frame 6 and is detachable from the striker 9 fixed to the vehicle floor 7. And a seat belt anchor 11.

  The seat frame 6 includes a seat frame portion 6A to which the seat cushion 4 is attached by combining and connecting a plurality of steel pipes, and a back frame portion 6B to which the seat back 5 is attached. The back frame portion 6B is movable so as to overlap the seat frame portion 6A by operating the strap 12 protruding outward from the upper end of the seat back 5.

  The front leg 8 is a floor side leg 8A fixed to the vehicle floor 7, and a frame side leg 8B fixed to a seating surface frame portion 6B that is rotatable about the rotation shaft 13 with respect to the floor side leg 8A. It consists of. Two front legs 8 are provided at predetermined intervals in the vehicle width direction.

  As shown in FIG. 4, the rear leg 10 includes a first plate member 14, a second plate member 15 that is coupled to the first plate member 14 in a closed cross section, and the first plate member. 14 and the reinforcing plate 16 provided in almost the entire area of the internal space formed by the second plate member 15.

  The first plate member 14 has an outer peripheral wall 17 that rises from the outer periphery toward the second plate member 15 side. A lock device 18 is attached to the lower end portion in the longitudinal direction of the first plate member 14 so as to be detachable with respect to the striker 9. The locking device 18 is configured to be able to release the engagement with the striker 9 by pulling the strap belt 19.

  The second plate member 15 has substantially the same outer shape as that of the first plate member 14 except that the second plate member 15 does not have the outer peripheral wall 17, and is coupled to the first plate member 14 so as to form a predetermined internal space. The For example, the first plate member 14 and the second plate member 15 are coupled by caulking the outer peripheral edges of each other to form a leg structure having a closed cross-sectional structure to increase mechanical strength.

  The rear leg 10 joined by caulking the first plate member 14 and the second plate member 15 is in contact with a stopper pin 21 fixed to a bracket 20 provided at the rear end of the seating surface frame portion 6A. A leg rotation preventing portion 22 that prevents the rear leg 10 from rotating is provided. The leg rotation preventing portion 22 is formed as a notch that contacts the stopper pin 21 and is provided in the vicinity of the rotation fulcrum shaft 23 of the rear leg 10.

  The reinforcing plate 16 is substantially in the inner space formed by the first plate member 14 and the second plate member 15 extending from the portion where the lock device 18 that is detachable from the striker 9 is provided to the leg rotation preventing portion 22. Provided in all areas. By providing this reinforcing plate 16, the mechanical strength of the rear leg 10 is further improved.

  The rear leg 10 configured as described above has a pivot fulcrum shaft 23 provided on the distal end side attached to the bracket 20 of the seat frame portion 6A so as to be rotatable. In the present embodiment, two rear legs 10 are provided at predetermined intervals in the vehicle width direction.

  The seat belt anchor 11 is attached to the side surface of the second plate member 15 of the rear leg 10. The seat belt anchor 11 is fixed to a portion near the engagement / disengagement position with the striker 9 (near the lock device 18) by fastening means such as a bolt 24.

  In the foldable seat 2 configured as described above, when an input load F1 from the front of the vehicle to the rear of the vehicle is applied, the tension applied to the seat belt is transmitted to the seat belt anchor 11. At this time, the rear leg 10 receives an input load from the seat belt anchor 11, but since the seat belt anchor 11 is provided in the vicinity of the engagement / disengagement position with the striker 9, the input load is transmitted to the vehicle floor 7. be able to. Therefore, the seat frame 6 is not affected by the input load from the seat belt anchor 11.

  Further, the input load F1 from the front of the vehicle is such that the stopper pin 21 fixed to the bracket 20 provided on the seating surface frame portion 6A comes into contact with the leg rotation preventing portion 22 of the rear leg 10 to increase the mechanical strength. The rear leg 10 is raised.

  On the other hand, when an input load F2 directed from the rear of the vehicle to the front of the vehicle is applied, the vehicle floor 7 is similarly connected to the seat frame 6 through the rear leg 10 without inputting the input load from the seat belt anchor 11 to the seat frame 6. Can communicate to. Further, the input load F2 from the rear of the vehicle is received by the rear leg 10 having a high strength by the leg rotation preventing portion 22 of the rear leg 10 coming into contact with the stopper pin 21.

  According to the foldable seat of the present embodiment, the seat belt anchor 11 is attached to the rear leg 10, so that the load inputted to the seat belt anchor 11 does not directly act on the seat frame 6 and is applied to the vehicle floor 7. It can be transmitted to the striker 9 to be fixed.

  Therefore, according to the present invention, it is not necessary to increase the thickness of the seat frame constituent members or increase the constituent members in order to increase the strength of the seat frame 6, and the weight of the seat frame itself can be reduced. Furthermore, according to the present invention, a dedicated reinforcement for attaching the seat belt anchor is not required, and the weight is reduced and the number of parts is reduced.

  Further, according to the foldable seat of the present embodiment, since the attachment position to the rear leg 10 of the seat belt anchor 11 is the vicinity of the engagement / disengagement position with the striker 9, the load applied to the seat belt anchor 11 is the load. Can be transmitted to the vehicle floor 7 in the vicinity of the seat belt anchor on which the action is applied. Therefore, the input load on the rear leg 10 can be reduced.

  Further, according to the foldable seat of the present embodiment, the rear leg 10 is combined with the first plate member 14 and the second plate member 15 so as to form a closed cross section, and in almost the entire region of these internal spaces. Since the reinforcing plate member 16 is provided, the mechanical strength of the rear leg 10 can be increased.

  Further, according to the folding seat of the present embodiment, the rear leg 10 is prevented from rotating by contacting the stopper pin 21 provided on the seat frame 6 in the vicinity of the rotation fulcrum shaft 23 of the rear leg 10. Since the leg rotation preventing portion 22 is provided, the distance between the rotation fulcrum shaft 23 and the leg rotation preventing portion 22 is shortened, and the moment acting on the rear leg 10 due to the load input from the vehicle front-rear direction. And the load applied to the rear leg 10 can be reduced.

  Moreover, according to the foldable seat of this embodiment, since the rear leg 10 is arranged vertically with the vehicle forward, the rear leg 10 does not get in the way and the foot space of the rear seat is enlarged. Can be achieved.

  In addition, embodiment mentioned above is an example of this invention and this invention is not restrict | limited to the said embodiment.

FIG. 1 is a perspective view of a foldable sheet according to the present embodiment. 2 is a perspective view of the foldable sheet of FIG. 1 as viewed from the bottom. FIG. 3 is a side view of the foldable seat attached to the vehicle floor. FIG. 4 is an exploded perspective view of a rear leg of the foldable sheet of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Folding seat 2 ... Folding seat 3 for 1 person Folding seat 4 for 2 people ... Seat cushion 5 ... Seat back 6 ... Seat frame 7 ... Vehicle floor 8 ... Front leg 9 ... Strike 10 ... Rear leg 11 ... Seat belt anchor 14 ... First plate member 15 ... Second plate member 16 ... Reinforcing plate 18 ... Locking device 20 ... Bracket 21 ... Stopper pin 22 ... Leg rotation prevention part 23 ... Rotation fulcrum shaft

Claims (1)

A seat frame to which a seat cushion and a seat back are attached;
A front leg attached to the vehicle front of the seat frame and fixed to the vehicle floor;
A rear leg that is pivotally attached to the rear of the vehicle of the seat frame and can be freely attached to and detached from a striker fixed to the vehicle floor;
A seat belt anchor attached to the rear leg ,
The rear leg includes a first plate member, a second plate member coupled to the first plate member in a closed cross section, and an interior formed by the first plate member and the second plate member. A reinforcing plate member provided in almost the entire area of the space ,
The attachment position of the seat belt anchor with respect to the rear leg is set as a portion near the engagement / disengagement position with the striker ,
A leg rotation preventing portion that is in contact with a stopper pin provided on the seat frame and prevents the rear leg from rotating in the vicinity of a rotation fulcrum shaft of a rear leg that is rotatably attached to the seat frame. A foldable sheet characterized by being provided .

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