JP6620982B2 - Seat rotation restriction structure - Google Patents

Description

  The present invention relates to a structure for restricting rotation of a seat disposed in a vehicle interior.

  Patent Document 1 describes a structure in which a seat is supported so as to be rotatable relative to a vehicle body. The seat is provided with a rotation link mechanism on the front leg of the seat cushion. The rotation link mechanism includes a first base member fixed to the vehicle body side, a second base member fixed to the seat cushion side, and a shaft support that rotatably supports the first base member and the second base member. And a hinge pin. In the vicinity of the hinge pin installation position in the first base member, a stopper member is installed and fixed so as to be locked to the locking portion of the second base member and restrict the maximum rotation position of the second base member. The rear leg of the seat cushion is provided with a lock mechanism that holds the seat in the seating position. FIG. 2 shows a pin-shaped stopper member having a diameter smaller than that of the hinge pin.

JP 2006-123578 A

  In the structure of Patent Document 1, when the vehicle collides with the front while the occupant is using the seat belt, the forward inertial force (load) of the occupant restrained by the seat belt is input to the seat, and the front is applied to the lock mechanism. A tensile load is applied obliquely upward. When the tensile load acting on the locking mechanism increases, the locking mechanism moves diagonally forward and upward, and the lock link side of the floor panel to which the locking link mechanism and the locking mechanism are fixed is diagonally forward upward. It bends and deforms to move to. At the time of the bending deformation, the front end side of the seat cushion is supported by the rotation link mechanism so as to be relatively rotatable with respect to the floor panel. Therefore, the floor panel between the rotation link mechanism and the lock mechanism is curved upward. When the floor panel is deformed into an upward convex curve, the distance between the rotation link mechanism and the lock mechanism is shortened, and the load applied to the lock mechanism is increased. It becomes easy to lead to increase in deformation and destruction.

  The stopper member regulates the rotation of the seat in the direction close to the floor panel, and thus contributes to a certain degree to the deformation suppression of the floor panel, but the deformation of the seat and the floor when an excessive tensile load is applied to the lock mechanism. In order to surely prevent the increase and destruction, it is necessary to firmly fix the stopper member whose rigidity is increased by increasing the outer diameter to the first base member, which leads to an increase in structure and weight.

  Therefore, an object of the present invention is to provide a seat rotation restricting structure capable of reliably preventing the deformation and destruction of the seat and the floor without increasing the size and weight of the structure.

  In order to achieve the above object, the present invention is a rotation restriction of a seat disposed in a passenger compartment, a seat front side support member, a seat rear side support member, a seat frame, an occupant restraint device, a stopper, Is provided.

  The seat front side support member has a front side support member bottom surface part placed on the upper surface of the floor panel that defines the lower side of the passenger compartment, and is fixed to the floor panel. The seat rear side support member is fixed to the floor panel behind the seat front side support member. The seat frame has a front end portion of the seat frame and a rear end portion of the seat frame. The front end portion of the seat frame is rotatably supported by the seat front side support member around a rotation shaft extending in the vehicle width direction. The rear end portion of the seat frame is detachably connected to the seat rear side support member. The seat frame holds the seat cushion of the seat and extends in the front-rear direction away from the floor panel at a seating position where the rear end portion of the seat frame is connected to the seat rear side support member. The heel part is supported from below via the seat cushion, and can be tilted forward and upward from the seating position around the rotation axis in a disconnected state in which the connection between the rear end of the seat frame and the rear seat support member is released. is there.

  The occupant restraint device can restrain an occupant seated on a seat on the seat. The stopper is disposed between the front support member bottom surface and the seat frame behind the rotation shaft, and is fixed to at least one of the seat front support member and the seat frame, and between the front support member bottom surface and the seat frame. The relative movement of the floor panel and the seat frame in the proximity direction is restricted by being sandwiched.

  If the vehicle collides frontward while the occupant is using the occupant restraint device, the forward inertial force (load) of the occupant restrained by the occupant restraint device is input to the seat, and the seat rear side support member is diagonally forward A tensile load is applied. When the tensile load acting on the seat rear support member increases, the seat rear support member moves diagonally forward and upward, and the floor panel moves the seat rear support member side diagonally forward and upward relative to the seat front support member side. It bends and deforms. At the time of the bending deformation, the front end portion of the seat frame is rotatably supported by the seat front side support member, so that the floor panel between the seat front side support member and the seat rear side support member is curved in a convex shape ( When the floor panel is deformed into an upward convex curve, the distance between the seat front support member and the seat rear support member is shortened, and the seat frame rear end portion and the seat rear support member The load applied to the connecting portion (seat locking mechanism) increases, and the deformation and destruction of the seat and the floor are easily caused.

  In contrast, in the above configuration, the stopper that restricts the relative movement of the floor panel and the seat frame in the proximity direction by being sandwiched between the bottom surface portion of the front support member and the seat frame is supported on the front side behind the rotating shaft. Since it is disposed between the bottom surface of the member and the seat frame and is fixed to at least one of the seat front support member and the seat frame, the above-described upward convex deformation of the floor panel can be suppressed by the stopper, and the seat Increase in deformation and destruction of the seat and floor due to shortening of the distance between the front support member and the seat rear support member can be reliably prevented.

  Further, since the stopper restricts the relative movement of the floor panel and the seat frame in the proximity direction by being sandwiched between the bottom portion of the front support member and the seat frame, the stopper is firmly attached to the seat front support member or the seat frame. It is not necessary to fix to, and sufficient rigidity can be secured even with a small stopper. Therefore, the structure is not complicated and heavy.

  According to the present invention, it is possible to reliably prevent an increase in deformation and destruction of a seat and a floor without causing an increase in size and weight of the structure.

It is the side view which looked at the sheet | seat provided with the rotation control structure of the sheet | seat which concerns on embodiment of this invention from the vehicle width direction. It is II-II arrow sectional drawing of the sheet | seat of FIG. It is the perspective view which looked at the front leg of the sheet | seat of FIG. 1 from diagonally upward front. FIG. 2 is a side view of a state in which a forward load is input to the seat of FIG. 1 as viewed from the vehicle width direction.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each figure, arrow FR indicates the front of the vehicle, arrow UP indicates the upper side, and arrow IN indicates the inner side of the vehicle width. In the following description, the so-called front-rear direction means the front-rear direction of the vehicle, and the left-right direction means the left-right direction when facing the front of the vehicle.

  As shown in FIG. 1, a rear seat (seat) 2 on which an occupant sits facing forward is provided at the rear of the vehicle interior of the vehicle. The floor panel 1 that defines the lower part of the passenger compartment includes a pair of left and right front legs (seat front support members) 10 and a pair of left and right strikers (seat rear support members) 13 disposed behind the front legs 10. The front part of the rear seat 2 is supported from below by the left and right front legs 10, and the rear part of the rear seat 2 is supported from below by the left and right strikers 13. Note that the left and right front legs 10 and the left and right strikers 13 are symmetrically configured, and therefore the following description will mainly be made on the left side and description on the right side will be omitted as appropriate. In the present embodiment, the rear seat is described as an example, but other seats such as a front seat disposed in the front portion of the vehicle interior may be used.

  The floor panel 1 includes a floor front portion 40, a first floor standing surface portion 41, a rear seat support surface portion 42, a second floor standing surface portion 43, and a floor rear portion 44. The floor front portion 40 includes a front seat region that supports a front seat (not shown) and a rear seat front region that extends continuously rearward from the front seat region in a flat surface shape. The first floor standing surface portion 41 is inclined obliquely rearward and upward from the rear edge of the floor front portion 40. The rear seat support surface portion 42 extends substantially horizontally rearward from the upper end edge of the first floor standing surface portion 41. The second floor standing surface portion 43 is inclined obliquely rearward and upward from the rear edge of the rear seat support surface portion 42. The floor rear portion 44 extends substantially horizontally from the upper edge of the second floor standing surface portion 43 to the rear.

  As shown in FIG. 3, the front leg 10 is disposed at the front end portion of the rear seat support surface portion 42 of the floor panel 1. The front leg 10 has a U shape that opens upward when viewed from the front-rear direction, and integrally includes a front support member bottom surface portion 20 and a pair of left and right front support member side plate portions 21. The front support member bottom surface portion 20 is fixed in surface contact with the front end of the rear seat support surface portion 42 of the floor panel 1. The front support member side plate portion 21 is bent at a substantially right angle from the left and right side edge portions of the front support member bottom surface portion 20 and extends upward. The upper end portions of the left and right front support member side plate portions 21 penetrate in the vehicle width direction. A support member side insertion hole 29 is formed.

  As shown in FIG. 1, the striker 13 is an inverted U-shaped rod body, and a lower end portion thereof is fixed to a rear end portion of the rear seat support surface portion 42 and is provided so as to protrude upward from the rear seat support surface portion 42.

  As shown in FIGS. 1 and 2, the rear seat 2 includes a seat cushion 14 that supports the buttocks of the seated person 4 from below, a pair of left and right seat frames 15 that hold the seat cushion 14, and a rear end of the seat cushion 14. The seat back 16 extends upward from the side and supports the back of the seated person 4 from behind. The left and right seat frames 15 are connected by a plurality of connecting shafts (not shown) extending in the vehicle width direction. Each pad material (not shown) of the seat cushion 14 and the seat back 15 is supported by a cushion frame (not shown) and a back frame (not shown) which are skeleton members, and the cushion frame is supported from below by the seat frame 15. Is done.

  Seat frame insertion grooves 18 that open downward are formed at the left and right ends of the lower surface of the seat cushion 14, and the seat frame insertion grooves 18 have a groove width substantially equal to the width of the seat frame 15 in the vehicle width direction. Have. At a seating position described later, the seat frame 15 supports the seat cushion 14 from below while being inserted into the seat frame insertion groove 18 while being spaced apart upward from the upper surface of the rear seat support surface portion 42 and extending linearly in the front-rear direction. . That is, the seat frame 15 in the sitting position supports the buttock of the occupant (seater 4) seated on the rear seat 2 from below through the seat cushion 14.

  A seat side insertion hole 28 that can communicate with the support member side insertion hole 29 is formed at the front end portion (seat frame front end portion 25) of the seat frame 15. With the seat frame front end portion 25 inserted between the left and right front support member side plate portions 21 of the front leg 10, the left and right support member side insertion holes 29 and the seat side insertion holes 28 communicate with each other in the vehicle width direction. By inserting the rotation shaft 27 into the support member side insertion hole 29 and the seat side insertion hole 28, the seat frame 15 is supported by the left and right front legs 10 so as to be rotatable about the rotation shaft 27.

  On the upper part of the rear end portion (seat frame rear end portion 26) of the seat frame 15, a back support portion 17 is provided so as to rotatably support the back frame of the seat back 16 about an axis extending in the vehicle width direction. Yes. The seat frame rear end portion 26 is provided with a seat back lock mechanism (not shown) for releasably fixing the tilt position of the seat back 16 with respect to the seat frame 15 (seat cushion 14) at an arbitrary position.

  A pair of left and right rear legs 11 project downward from the lower portion of the rear end portion 26 of the seat frame. Each rear leg 11 is provided with a seat lock mechanism 22, and each seat lock mechanism 22 includes a striker receiving portion 23 and an engagement hook 24. The striker receiving portion 23 is a recess that opens downward in the lower end portion of the rear leg 11 when viewed from the vehicle width direction. The engagement hook 24 is rotatably attached to the rear leg 11 around an axis extending in the vehicle width direction and engages with the striker 13 so as to be releasable. The engagement hook 24 is urged in a direction to engage with the striker 13 by an urging member (not shown) such as a spring, and an occupant or the like rotates the engagement hook 24 against the urging force of the urging member. As a result, the engagement between the engagement hook 24 and the striker 13 (the lock of the seat lock mechanism 22) is released. That is, the seat frame rear end portion 26 (rear leg 11) is detachably connected to the striker 13 (seat lock mechanism 22).

  When using the rear seat 2 (sitting on the rear seat 2), the occupant sets the rear seat 2 at the seating position where the seat frame rear end portion 26 is connected to the striker 13 by the seat lock mechanism 22, and appropriately sets the seat back lock mechanism. By operating, the seat back 16 is set to a desired inclination angle.

  On the other hand, when storing without using the rear seat 2, the occupant unlocks the seat back lock mechanism, lays down the seat back 16 so as to overlap the seat cushion 14, and then unlocks the seat lock mechanism 22. In the state (the connection release state in which the connection between the rear end portion 26 of the seat frame and the striker 13 is released), the rear end side of the rear seat 2 is lifted, and the rear seat 2 is moved forward from the seating position to the retracted position around the rotary shaft 27. Tilt upward and stand up.

  The rear seat 2 is provided with a seat belt device (occupant restraint device) 3. The seat belt device 3 includes a retractor (winding device) 50, a seat belt 51, left and right anchor portions 52 </ b> L and 52 </ b> R, and a connection fitting 53. The retractor 50 is built in, for example, an upper end portion of the seat back 16 on the outer side in the vehicle width direction, and one end portion of the seat belt 51 is wound around the retractor 50 so as to be able to be fed out. A connecting fitting 53 is movably inserted in an intermediate portion of the seat belt 51, and the other end portion of the seat belt 51 is fixed to an anchor portion 52L on the outer side in the vehicle width direction. A buckle 54 on which the connecting fitting 53 is detachably locked is provided in the anchor portion 52R on the inner side in the vehicle width direction, and an occupant (seat 4) seated on the rear seat 2 locks the connecting fitting 53 on the buckle 54. As a result, the rear seat 2 is restrained.

  As shown in FIGS. 1 to 3, a metal stopper 12 is provided behind the rotating shaft 27. The stopper 12 is between the upper surface of the front support member bottom surface portion 20 of the front leg 10 and the lower surface of the seat frame front end portion 25 and tilts between a seating position and a retracted position about the rotation shaft 27. 15 is disposed at a position where it does not interfere with 15. The stopper 12 has a box shape integrally including a stopper bottom surface portion 30, a stopper side surface portion 31, and a stopper contact surface portion 32. The stopper bottom surface portion 30 is fixed to the front support member bottom surface portion 20 by welding or the like while being in surface contact with the top surface of the front support member bottom surface portion 20, and the upper surface of the stopper contact surface portion 32 is the seat frame front end portion 25 at the seating position. Opposite the bottom surface of the panel in proximity or contact. The stopper 12 restricts the relative movement of the floor panel 1 and the seat frame 15 in the proximity direction by being sandwiched between the front support member bottom surface portion 20 and the seat frame front end portion 25.

  As shown in FIG. 4, when the vehicle 4 collides frontward when the seated person 4 of the rear seat 2 is using the seat belt 51 (seat belt device 3), the seated person 4 restrained by the seat belt 51 moves forward. Inertial force (load) is input to the rear seat 2, and a tensile load is applied to the striker 13 obliquely upward in the forward direction. When the tensile load acting on the striker 13 increases, the striker 13 moves diagonally forward and upward, and the floor panel 1 is bent and deformed so that the striker 13 side moves diagonally forward and upward relative to the front leg 10 side. At the time of the bending deformation, the seat frame front end 25 is rotatably supported by the front leg 10, so that the floor panel 1 between the front leg 10 and the striker 13 is curved upward (curved upward). If the floor panel 1 is deformed in an upward convex curve, the distance between the front leg 10 and the striker 13 is shortened, and the load applied to the seat lock mechanism 22 is increased, so that the rear seat 2 and the floor It becomes easy to lead to deformation increase and destruction.

  On the other hand, in this embodiment, the stopper 12 that restricts the relative movement of the floor panel 1 and the seat frame 15 in the proximity direction by being sandwiched between the front support member bottom surface portion 20 and the seat frame 15 is rotated. Since it is disposed behind the shaft 27 between the front support member bottom surface portion 20 and the seat frame 15 and fixed to the front leg 10, the above-described upwardly convex curved deformation of the floor panel 1 is suppressed by the stopper 12. Therefore, it is possible to reliably prevent the deformation and destruction of the rear seat 2 and the floor due to the shortening of the distance between the front leg 10 and the striker 13.

  Further, the stopper 12 restricts the relative movement of the floor panel 1 and the seat frame 15 in the proximity direction by being sandwiched between the bottom surface portion 20 of the front support member and the seat frame 15. Therefore, even if the stopper 12 is small, sufficient rigidity can be ensured. Therefore, the structure is not complicated and heavy.

  In the above embodiment, the stopper 12 is fixed to the front leg 10 side. However, the present invention is not limited to this, and the stopper 12 may be fixed to the seat frame 15 side. Further, the stopper may be divided, and one of the stoppers may be fixed to the front leg 10 side, and the other may be fixed to the seat frame 15 side. That is, the stopper is disposed behind the rotating shaft 27 and between the front support member bottom surface portion 20 and the seat frame 15 at the seating position, and is fixed to at least one of the front leg 10 and the seat frame 15 (for example, The stopper is fixed in a state where the top surface of the stopper is in surface contact with the bottom surface of the seat frame 15 and the bottom surface is a contact surface portion, the stopper is a vertically divided type, the top stopper is fixed to the bottom surface of the seat frame 15, The lower stopper may be fixed to the upper surface of the bottom surface portion 20 of the front support member, and the lower surface of the upper stopper and the upper surface of the lower stopper may be contact surfaces.

  Moreover, in the said embodiment, although the stopper 12 was made into the hollow box-shaped body, the form of the stopper 12 is not limited to this, For example, it may be a solid block body and is good also as a structure which has a honeycomb shape. In the case of a structure having a honeycomb shape, the stopper may be formed of a nonmetallic material such as a resin.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The present invention can be widely applied to a vehicle seat whose front end side is rotatably supported.

1 Floor panel 2 Rear seat (seat)
3 Seat belt device (occupant restraint device)
4 Crew (seat)
10 Front leg (Seat front support member)
11 Rear leg 12 Stopper 13 Striker (Seat rear support member)
DESCRIPTION OF SYMBOLS 14 Seat cushion 15 Seat frame 16 Seat back 17 Back support part 18 Seat frame insertion groove 20 Front support member bottom face part 21 Front support member side plate part 22 Seat lock mechanism 23 Strike receiving part 24 Engagement hook 25 Seat frame front end part 26 Seat frame Rear end portion 27 Rotating shaft 28 Seat side insertion hole 29 Support member side insertion hole 30 Stopper bottom surface portion 31 Stopper side surface portion 32 Stopper contact surface portion 40 Floor front portion 41 First floor rising surface portion 42 Rear seat support surface portion 43 Second floor rising surface portion 44 Floor rear part 50 Retractor 51 Seat belt 52L, 52R Anchor part 53 Connecting bracket 54 Buckle

Claims (1)

A structure for restricting rotation of a seat disposed in a vehicle interior,
A front seat support member that is placed on the upper surface of a floor panel that defines a lower part of the passenger compartment, and is fixed to the floor panel;
A rear seat support member fixed to the floor panel behind the front seat support member;
A seat frame front end portion rotatably supported by the seat front side support member around a rotation axis extending in the vehicle width direction; and a seat frame rear end portion detachably connected to the seat rear side support member. The seat cushion holds the seat cushion, and the seat frame rear end portion is connected to the seat rear side support member, and is spaced upward from the floor panel and extends in the front-rear direction, and is seated on the seat. The seating position with the occupant's buttocks supported from below via the seat cushion and in the released state where the connection between the rear end portion of the seat frame and the rear seat support member is released, with the rotating shaft as the center. A seat frame that can tilt forward and upward,
An occupant restraint device capable of restraining an occupant seated on the seat to the seat;
The front support member bottom surface portion and the seat frame are disposed between the front support member bottom surface portion and the seat frame behind the rotation shaft and fixed to at least one of the seat front support member and the seat frame. And a stopper for restricting relative movement of the floor panel and the seat frame in the proximity direction by being sandwiched between the floor panel and the seat frame.

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