JP4637249B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat corresponding to a load input to a vehicle side surface.

  The vehicle seat incorporates a vertically long energy absorbing pad that absorbs impact from the side of the vehicle and protects the occupant in a vertically raised portion (seat side support portion) that bulges to the front side portion of the seat back. Thus, there is one that enhances the passenger protection function at the time of a side collision (see, for example, Patent Document 1).

  However, in the related art (Patent Document 1), when the raised portion (seat side support portion) of the seat back is employed in the rear seat close to the vehicle body, it has been desired to further reduce the load on the passenger received from the vehicle body.

Japanese Patent No. 3546143

  The present invention reduces the load that pushes the occupant due to the deformation of the vehicle body when a load is input to the vehicle side surface, and the occupant holding function during normal operation and the occupant protection function when the load is input to the vehicle side surface. It is an object of the present invention to provide a vehicle seat that is compatible.

In order to solve the above-mentioned problem, the invention according to claim 1 is a vehicle seat disposed along a door opening that forms a passenger entrance of a vehicle body and a door provided in the door opening, and the vehicle opening direction of the door opening The seat side support portion of the seat back of the seat is erected along the vertical frame rear flange portion on the rear side of the vehicle, and the vertical frame rear flange portion from the outside of the vehicle. A deformation allowing portion that allows deformation when deformation is caused by the input force, and the deformation allowing portion has at least a part of the reinforcing member formed on the back of the seat side support portion with respect to the force from the remaining portion. It is characterized by weakening .

In the invention which concerns on Claim 2 , the deformation | transformation permission part is equipped with the load relaxation part which consists of a foam or a hollow body, It is characterized by the above-mentioned.

In the invention according to claim 3 , the door includes a load transmission portion that transmits the force input from the outside to the vehicle body, and the deformation allowing portion is located at a position spaced apart from the load transmission portion in the vehicle longitudinal direction or the vehicle vertical direction. It is characterized by being arranged in.

In the invention according to claim 4 , the door includes a door beam coupled to the load transmitting portion and extending in the vehicle front-rear direction, and an impact absorber that overlaps the door beam in a side view of the vehicle. The deformation permitting portion is arranged so as not to interfere when moving toward the seat by deformation.

The invention according to claim 5 is characterized in that the seat side support portion includes a stay that extends and is fixed in the vehicle front-rear direction to a vehicle body or a seat back frame of the seat back.

In the invention which concerns on Claim 6 , the seat side support part is formed in the curved shape which becomes convex ahead of a vehicle, It is characterized by the above-mentioned.

In the invention according to claim 7 , the vehicle body includes a cross member that extends to the left and right of the vehicle in the vicinity of the load transmission portion, and a gusset portion that transmits the load from the load transmission portion to the cross member, and is located above the gusset portion. It is characterized in that a deformation allowing portion is arranged.

  In the invention according to claim 1, the seat side support portion of the seat back of the seat is erected along the vertical frame rear flange portion on the vehicle rear side of the door opening, and input from the outside of the vehicle to the vertical frame rear flange portion When the load is applied to the side of the vehicle, for example, in the case of a side collision, the seat side support part is deformed together with the vehicle body. Absorbs shock. Therefore, it is possible to reduce the load that pushes the occupant due to the deformation of the vehicle body, particularly the load that pushes the waist.

In the invention according to claim 1 , since the deformation permission portion weakens at least a part of the reinforcing member formed on the back side of the seat side support portion with respect to the force from the remaining portion, the deformation permission portion is usually Without being deformed, the shape of the seat side support portion when seated can be maintained and the hold function can be exhibited. Therefore, it is possible to achieve both a normal occupant holding function and an occupant protection function when a load is input to the side surface of the vehicle.

In the invention according to claim 2 , since the deformation-permitting portion includes a load relaxation portion made of a foam or a hollow body, a load applied to the occupant for a long time via the load relaxation portion at the time of deformation is foamed or hollow. It can be adjusted in advance according to the characteristics.

In the invention according to claim 3 , the door includes a load transmission portion that transmits the force input from the outside to the vehicle body, and the deformation allowing portion is located at a position spaced apart from the load transmission portion in the vehicle longitudinal direction or the vehicle vertical direction. Therefore, when the load is transmitted from the door to the vehicle body via the load transmitting portion, the deformation of the deformation allowing portion (for example, the load relaxation portion) by the load transmitting portion can be reduced. There is an advantage that the load is not directly transmitted to the occupant.

In the invention according to claim 4 , the door includes a door beam coupled to the load transmitting portion and extending in the vehicle front-rear direction, and an impact absorber that overlaps the door beam in a side view of the vehicle. Since the deformation allowing portion is arranged so as not to interfere when moving toward the seat due to deformation, the shock absorber pushed by the portion with a small door intrusion amount in the portion where the door intrusion amount is small is arranged. Contact the occupant and restrain the occupant appropriately. As a result, the input load (impact) transmitted to the occupant via the shock absorber can be reduced.

  In addition, the amount of deformation of the deformation-permitting portion of the seat side support portion does not affect the stroke (deformation amount) of the shock absorber corresponding to the door penetration amount, and the restraint load that restrains the shock absorber occupant is stabilized. Can do.

In the invention according to claim 5 , since the seat side support portion includes a stay that extends and is fixed to the vehicle body or the seat back frame of the seat back in the vehicle front-rear direction, the door enters in a direction intersecting the vehicle front-rear direction. The stay is not stuck toward the car body. Therefore, the deformation amount of the deformation allowing portion when pushed by the entering door or the vehicle body can be increased.

In the invention which concerns on Claim 6 , since the seat side support part is formed in the curved shape which becomes convex ahead of a vehicle, when a door or a vehicle body penetrate | invades, there exists an advantage that it becomes easy to bend.

In the invention according to claim 7 , the vehicle body includes a cross member that extends to the left and right of the vehicle in the vicinity of the load transmission portion, and a gusset portion that transmits the load from the load transmission portion to the cross member, and is located above the gusset portion. Since the deformation permitting portion is arranged, the effect of suppressing the deformation amount of the door is improved and the door intrusion amount is reduced, but when the door intrusion amount is further increased, the deformation permitting portion causes the passenger to enter. There is an advantage that the input of the load to is reduced.

1 is a side view of a vehicle that employs a vehicle seat according to an embodiment of the present invention. 1 is a perspective view of a vehicle seat according to an embodiment of the present invention. It is a perspective view of the seat side support part of the vehicle seat which concerns on an Example. It is sectional drawing of the vehicle seat and door which concern on an Example. It is a figure explaining the mechanism which absorbs the impact of the vehicle seat which concerns on an Example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to examples.

  As shown in FIG. 1, the vehicle seat 11 according to the embodiment is a rear seat of the vehicle 12. When a load (impact) is input to the side surface 13 of the vehicle 12, the seat 15 is opened by the seat side support portion 14. And the impact associated with the deformation of the vehicle body 16 is mitigated. This will be specifically described below.

  1 and 2, the vehicle 12 includes a vehicle body 16 and a door 15 (having a left front door 17 and a left rear door 18). The vehicle body 16 includes an underbody 22 that forms a floor of the passenger compartment 21, and a side wall. And a side body 23.

  The underbody 22 includes left and right side sills 24 formed with the side body 23, a rear side frame 25 extending from the side sills 24 to the rear of the vehicle 12, a seat mounting portion 27 that fixes the seat 11, and left and right seats provided below the seat 11. A cross member (floor center cross member) 28 extending toward the vicinity of the side sill 24 and a gusset portion 31 attached to both ends of the cross member 28 so as to be close to the left rear door 18.

  The side body 23 includes a center pillar 33 that extends from the center of the side sill 24 (with respect to the length extending in the front-rear direction) to the roof 32, a rear pillar 34 that extends rearward from the roof 32, a door opening 36 that forms a doorway, and a rear wheel 37. And a rear wheel house 41 formed continuously to the rear side frame 25.

Next, the vehicle seat 11 will be mainly described with reference to FIGS. 3A is a perspective view of the seat side support portion 14, and FIG. 3B is a perspective view of the seat side support main body.
The vehicle seat 11 is disposed along a door opening 36 that forms an entrance / exit of the vehicle body 16 and a door (left rear door) 18 provided in the door opening 36, and the entrance / exit facing the front / rear direction of the vehicle 12 in the door opening 36. The seat side support portion 14 of the seat back 46 of the seat 11 is erected along the vertical frame rear flange portion 44 on the rear side of the vehicle 12 in the vertical frame 43, and the vertical frame rear flange portion 44 A deformation allowing portion 47 is provided that allows deformation when deformation is caused by a force input from the outside (in the direction of the arrow a1).

As shown in FIG. 3, the deformation allowing portion 47 causes at least a part (lower end rib 49) of the reinforcing member 48 formed on the back of the seat side support portion 14 to be a force (force in the direction of the arrow a1) from the remaining portion. On the other hand, it is weakening.
The reinforcing member 48 includes a lower end rib 49, a base plate 51, a rib 52, a first stay 53, a second stay 54, a third stay 55, and a fourth stay 56.

The deformation | transformation permission part 47 is provided with the load relaxation part 61 which consists of a foam or a hollow body.
The door (left rear door) 18 includes a load transmission portion 63 that transmits the force input from the outside to the vehicle body 16, and the deformation allowing portion 47 is in the vertical direction of the vehicle 12 with respect to the load transmission portion 63 as shown in FIG. It is arranged at a position separated in the (Z-axis direction). In addition, the deformation | transformation permission part 47 may be spaced apart in the vehicle 12 front-back direction (X-axis direction).

  The door (left rear door) 18 is coupled to the load transmitting portion 63 and extends in the front-rear direction of the vehicle 12. The door absorber 65 overlaps the door beam 65 in a side view of the vehicle 12 (viewpoint in FIG. 1). , And the deformation permitting portion 47 is arranged so as not to interfere when the shock absorber 66 moves toward the seat 11 by deformation of the door (left rear door) 18.

  The seat side support portion 14 includes stays (a first stay 53, a second stay 54, a third stay 55, and a fourth stay 56) that are fixed to the vehicle body 16 and extend in the front-rear direction of the vehicle 12. The stays (first stay 53, second stay 54, third stay 55, and fourth stay 56) may be fixed to the seat back frame 67 of the seat back 46.

The seat side support portion 14 is formed in a curved shape that protrudes forward of the vehicle 12.
As shown in FIGS. 2 and 4, the vehicle body 16 transmits a load from the load transmitting unit 63 to the cross member 28 that extends close to the load transmitting unit 63 and extends to the left and right (Y-axis direction) of the vehicle 12. A gusset portion 31, and a deformation allowing portion 47 is disposed above the gusset portion 31.

  “The deformation allowing portion 47 is disposed above the gusset portion 31” means that 50% or more of the deformation allowing portion 47 is disposed, and the load relaxing portion 61 is placed on the gusset portion 31 in a side view. Including the state where the lower part overlaps.

  The door opening (entrance / exit) 36 includes a vertical frame rear flange portion 44, a vertical frame center pillar flange portion 71, a horizontal frame upper flange portion formed by the roof side rail 72, and a horizontal frame lower flange portion formed by the side sill 24. And is sealed with a door (left rear door) 18.

As shown in FIG. 4, the door (left rear door) 18 is provided between the outer panel 74, the inner panel 75, the resin door lining 76 attached to the inner panel 75, and the outer panel 74 and the inner panel 75. Door beam 65, and an impact absorber 66 provided between the inner panel 75 and the door lining 76.
The shock absorber 66 is, for example, a resin urethane pad.

The seat 11 is also a three-seat structure comprising a left seat portion 77, a central seat portion 78, and a right seat portion (similar to the left seat portion 77). The seat 11 is symmetrical with respect to the center of the central seat portion 78. The seat cushion 81 is fixed to the seat cushion 81, and the seat back 46 is provided so as to stand up to the seat cushion 81.
The seat back 46 is provided with a left seat side support portion 14 that is continuous with the back support center portion 83 of the left seat portion 77, and is continuous with the back support center portion of the right seat portion (similar to the back support center portion 83). The seat side support part (symmetric with the left seat side support part 14) is provided.

  Specifically, the seat side support portion 14 is formed with a base plate 51 having a substantially U-shaped cross section as shown in FIG. 3 along the front portion of the rear wheel house 41 in FIG. 4 and along the rear flange portion 44 in the vertical frame. A skin material 85 is bonded to the surface of the base plate 51, and ribs 52 are formed in a lattice pattern on the back surface of the base plate 51. The first stay 53, the second stay 54, the third stay 55, and the fourth stay 56 are formed on the rib 52. A plate-shaped lower end rib 49 orthogonal to the base plate 51 is formed at the lower end of the base plate 51, and a V-shaped notch 86 is formed at the center of the lower end rib 49. Has been. A notch 86 is included in the deformation allowing portion 47.

  The first stay 53, the second stay 54, the third stay 55, and the fourth stay 56 are arranged such that their axis 88 is substantially parallel to the door (left rear door) 18.

The seat side support portion 14 is held by a third stay 55 with a load relaxation portion 61 (foam) disposed under the base plate 51.
The load relaxation portion 61 is a foam, and urethane formed by foaming a resin is formed in a polygon.
In addition, although the load relaxation part 61 employ | adopted the foam, you may use a bag-shaped or box-shaped hollow body.

Next, the operation of the vehicle seat 11 according to the embodiment of the present invention will be described mainly with reference to FIG.
In the vehicle seat 11, when a load (impact) is input to the side surface 13 of the vehicle 12 and the door (left rear door) 18 or the side body 23 of the vehicle body 16 is deformed, the seat side support portion 14 is placed between the passenger M Since it is deformed while being interposed, a collision caused by the door (left rear door) 18 or the side body 23 can be absorbed.

  Specifically, for example, a load (impact) is input to the side surface 13 of the vehicle 12 by the other vehicle 91 as indicated by an arrow a4, and the door (the left rear door) 18 and the side body 23 are directed inward of the passenger compartment 21. When pushed in while being deformed, the door 18 and the side body 23 push the seat side support portion 14 as shown by arrows a5 and a6, so that the seat side support portion 14 is weakened, that is, starts to be deformed starting from the notch 86. As a result, the deformation permitting portion 47 is used as a starting point for deformation. As a result, the seat side support portion 14 absorbs an impact while deforming from a U-shaped cross section to an I-shaped cross section.

  In addition, in the process in which the notch 86 included in the deformation permission portion 47 is deformed, the load relaxation portion 61 employed in the deformation permission portion 47 is also deformed and absorbs the shock, so that the shock can be absorbed more.

  At that time, the load is input in a direction orthogonal to the door 18 (the direction of the Y-axis or the direction of the arrow a4), and the first stay 53, the second stay 54, Since a load is input to the third stay 55 and the fourth stay 56 in a direction crossing the axis 88, the first stay 53 to the fourth stay 56 do not hinder the deformation of the deformation allowing portion 47.

Further, when the door 18 and the side body 23 are deformed inward, the load transmitting portion 63 moves toward the seat 11 together with the door beam 65, the load transmitting portion 63 transmits the load to the gusset portion 31, and the gusset portion 31 is a cross member. The load is transmitted to 28 as shown by arrow a7.
When the load is further increased, the gusset portion 31 and the cross member 28 start to be deformed, and when the door 18 and the side body 23 push the seat side support portion 14 as described above, the seat side support portion 14 absorbs the impact. .

  In this process, the load relaxation portion 61 provided in the deformation allowing portion 47 does not interfere with the load transmission portion 63 as shown in FIG. 1, so the load transmission portion 63 first transmits the load to the cross member 28, and then continues. In addition to the cross member 28, the load relaxation portion 61 can absorb an impact.

  In addition, when the door 18 and the side body 23 are deformed inward, the door beam 65 is deformed to move the shock absorber 66 disposed behind the door lining 76 toward the seat 11. Since the shock absorber 66 can move without interfering with the load relaxation portion 61 and contacts the occupant M via the door lining 76, the shock absorber 66 can reduce the shock transmitted to the waist.

  Thus, in the vehicle seat 11 according to the embodiment, the seat side support portion 14 can be deformed to absorb the impact, and the impact (load) of the door 18 and the side body 23 on the occupant M can be reduced. .

Note that the vehicle seat of the present invention is employed in the rear seat of the sedan in the embodiment, but can be employed in the third row of the three-row seat.
The vehicle 12 includes an occupant protection device. The occupant protection device includes an underbody 22 (cross member 28, gusset portion 31), a vehicle seat 11, and a door 18. The door 18 is subjected to a side collision load. When the load is relatively small, that is, when the load is such that only the door 18 deforms to absorb the impact, the occupant is protected, and when the load is larger, the impact is absorbed by the cross member 28 to protect the occupant. Under the condition that the load is larger, the occupant can be protected by absorbing the impact with the seat side support portion 14 of the vehicle seat 11.

  The vehicle seat 11 of the present invention is suitable for a rear seat.

  DESCRIPTION OF SYMBOLS 11 ... Vehicle seat, 12 ... Vehicle, 14 ... Seat side support part, 16 ... Vehicle body, 18 ... Door (left rear door), 28 ... Cross member, 31 ... Gusset part, 36 ... Door opening, 43 ... Vertical entrance / exit frame , 44 ... Vertical frame rear flange part, 46 ... Seat back, 47 ... Deformation allowing part, 48 ... Reinforcing member, 49 ... Part (lower end rib), 53 ... First stay, 54 ... Second stay, 55 ... Third Stay, 56 ... 4th stay, 61 ... Load relaxation part, 63 ... Load transmission part, 65 ... Door beam, 66 ... Shock absorber.

Claims (7)

A vehicle seat disposed along a door opening that forms a doorway for a vehicle body and a door provided in the door opening,
A seat side support portion of the seat back of the seat is erected along a vertical frame rear flange portion on the vehicle rear side of the vertical frame facing the vehicle front-rear direction of the door opening. The frame rear flange portion includes a deformation permission portion that allows deformation when deformation is caused by a force input from the outside of the vehicle ,
The vehicle seat according to claim 1, wherein the deformation allowing portion weakens at least a part of a reinforcing member formed on the back of the seat side support portion with respect to the force from the remaining portion . The deformable portion of the vehicle seat according to claim 1 Symbol mounting, characterized in that it comprises a load absorbing portion made of foam or a hollow body. The door includes a load transmission unit that transmits a force input from the outside to the vehicle body,
3. The vehicle seat according to claim 1, wherein the deformation allowing portion is disposed at a position separated from the load transmitting portion in a vehicle longitudinal direction or a vehicle vertical direction. The door includes a door beam coupled to the load transmission portion and extending in the vehicle front-rear direction, and an impact absorber that overlaps the door beam in a vehicle side view,
The vehicle according to any one of claims 1 to 3 , wherein the deformation allowing portion is arranged so as not to interfere when the shock absorber moves toward the seat due to deformation of a door. Seat. The sheet side support portion of the vehicle according to any one of claims 1 to 4, characterized in that it comprises the vehicle body or stay fixed to extend in the longitudinal direction of the vehicle to the seat back frame of the seat back Seat. The vehicle seat according to any one of claims 1 to 5 , wherein the seat side support portion is formed in a curved shape that is convex forward of the vehicle. The vehicle body includes a cross member that extends to the left and right of the vehicle in the vicinity of the load transmission portion, and a gusset portion that transmits a load from the load transmission portion to the cross member,
The vehicle seat according to any one of claims 1 to 6 , wherein the deformation allowing portion is disposed above the gusset portion.

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