JP2012066800A - Seat for vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a seat for vehicle, capable of suppressing deformation to a falling direction at side-surface collision time.SOLUTION: A pipe 36 is bridged over between a seat leg 20 and a seat leg 22. A connection position of the seat leg 20, positioned at an outer side in a vehicle-width direction, and a connection part 38 of the pipe 36 is placed on a vehicle-body floor 32 side, and a connection position of the seat leg 22, positioned on an inner side in the vehicle-width direction, and a connection part 40 of the pipe 36 is placed on a higher side of the vehicle than the connection position of the connection part 38. Thereby, at the side-surface collision time, when a moment acts on the seat 10 for vehicle with the bottom side of the seat leg 20 as a center, the seat 10 for vehicle is tilted to the inner side in the vehicle-width direction, and so called match box deformation is likely to occur in the seat 10 for vehicle. At this time, the connection part 38 of the pipe 36 is separated further from the connection part 40, and a tensile load acts on the pipe 36. Consequently, the match box deformation of the seat 10 for vehicle is suppressed by reaction force of the pipe 36.

Description

  The present invention relates to a vehicle seat in which deformation during a side collision is suppressed.

  For example, in Patent Document 1, a beam is provided along a vehicle width direction between a pair of left and right seat legs constituting a leg portion of a vehicle seat, and the side of the beam is closer to the vehicle than the seat leg. A protruding portion protruding outward in the width direction is provided. In addition, a load transmission member whose length in the vehicle width direction is substantially the same as the length of the protruding portion of the beam is disposed on the side surface of the seat leg. By distributing the input load to the beam and the seat leg, the beam is prevented from being deformed and the door is prevented from entering the vehicle interior.

JP 2009-190669 A

  However, if the moment acting on the seat leg is large at the time of a side collision, the upper end side of the seat leg falls inward in the vehicle width direction centering on the lower end side of the seat leg, and the legs of the vehicle seat are parallel when viewed from the rear side of the vehicle There is a possibility of deformation into a quadrilateral shape (so-called matchbox deformation).

  In view of the above fact, an object of the present invention is to suppress deformation of the vehicular seat in a falling direction during a side collision.

  In order to achieve the above object, a vehicle seat according to claim 1 is disposed at intervals in the vehicle width direction, and a pair of seat legs that support the seat, and both ends of the pair of seat legs in the vehicle width direction. And a reinforcing member whose joint position with the seat leg located on the inner side in the vehicle width direction is set higher than the joint position with the seat leg located on the outer side in the vehicle width direction.

  In the vehicle seat according to the first aspect, a pair of seat legs that support the seat are arranged at an interval in the vehicle width direction. Both ends of the reinforcing member in the vehicle width direction are joined to the pair of seat legs, respectively. The joining position of the reinforcing member with the seat leg located on the inner side in the vehicle width direction is set higher than the joining position with the seat leg located on the outer side in the vehicle width direction.

  As a result, when a moment acts on the vehicle seat and the vehicle seat tilts inward in the vehicle width direction at the time of a side collision, the vehicle body floor to which the seat leg is attached, the pair of seat legs, and the seat portion of the vehicle seat are formed. The formed space shape tends to be deformed from a substantially rectangular shape when viewed from the rear of the vehicle to a substantially parallelogram shape (a so-called match box deformation of a vehicle seat).

  At this time, a tensile load acts on the reinforcing member, and a reaction force by the reinforcing member can be obtained. This reaction force can suppress the matchbox deformation of the vehicle seat. And until it reaches the yield load of a reinforcement member, the reaction force with respect to the deformation | transformation to the fall direction of a vehicle seat can be obtained by the deformation | transformation of the said reinforcement member. That is, at the time of a side collision, the entry speed of the door into the vehicle interior can be reduced.

  According to a second aspect of the present invention, there is provided a vehicular seat having a space in the vehicle width direction, and a pair of seat legs that support the seat, and both ends in the vehicle width direction are joined to the pair of seat legs. The joint position with the seat leg located on the inner side in the vehicle width direction is set higher than the joint position with the seat leg located on the outer side in the vehicle width direction, and the pair of seat legs tilts inward in the vehicle width direction at the time of a side collision Then, it has a reinforcing member on which a tensile load acts in the longitudinal direction.

  In the vehicle seat according to claim 2, when a moment acts on the vehicle seat and the vehicle seat tries to tilt inward in the vehicle width direction at the time of a side collision, a tensile load acts on the reinforcing member. Thereby, the reaction force by the said reinforcement member can be obtained, and tilting (match box deformation) of the vehicle seat can be suppressed by this reaction force.

  A vehicle seat according to a third aspect is the vehicle seat according to the first aspect, wherein a joint position between the seat leg located on the outer side in the vehicle width direction and the reinforcing member extends along the vehicle longitudinal direction on the vehicle body floor. It is provided and is close to a rail that allows the seat to move in the vehicle longitudinal direction.

  In the vehicle seat according to the third aspect, the joint position between the seat leg located on the outer side in the vehicle width direction and the reinforcing member is close to the rail that allows the seat to move in the vehicle front-rear direction. For this reason, a joining position can be arrange | positioned below with respect to the input position of a collision load. Therefore, when a side collision occurs, a moment is generated in the vehicle seat, and when the vehicle seat tries to tilt inward in the vehicle width direction, a tensile load acts on the reinforcing member, and a reaction force against deformation of the vehicle seat in the tilting direction. Can be obtained.

  The vehicle seat according to claim 4 is the vehicle seat according to any one of claims 1 to 3, wherein a joint portion on one end side of the reinforcing member joined to a seat leg located outside in the vehicle width direction. Is facing the vehicle lower side, and the joint portion on the other end side of the reinforcing member joined to the seat leg located on the inner side in the vehicle width direction faces the vehicle upper side.

  In the vehicle seat according to claim 4, as described above, the joint portion on one end side of the reinforcing member joined to the seat leg on the outer side in the vehicle width direction faces the vehicle lower side and is joined to the seat leg on the inner side in the vehicle width direction. The joint portion on the other end side of the reinforcing member faces the upper side of the vehicle. Furthermore, the joining position of the seat leg on the inner side in the vehicle width direction and the reinforcing member is set higher than the joining position of the seat leg on the outer side in the vehicle width direction. As a result, the reinforcing member is substantially Z-shaped when viewed from the vehicle front-rear direction, and the angle formed by the reinforcing member main body and the joint is an obtuse angle. That is, when the vehicle seat is tilted inward in the vehicle width direction, the reinforcing member is formed so that the angle formed by the reinforcing member main body and the joint portion is deformed in the opening direction.

  The vehicular seat according to claim 5 is the vehicular seat according to any one of claims 1 to 4, wherein the vehicular seat is outside a seat leg located outside in the vehicle width direction, and the seat leg and the reinforcing member A load transmission member that transmits a load to the seat leg is disposed below the vehicle joining position.

  In the vehicle seat according to claim 5, by providing a load transmission member outside the seat leg located on the outer side in the vehicle width direction, a collision load is input to the load transmission member at the time of a side collision. . And the load input into the load transmission member is transmitted to a seat leg. Here, when the joint position between the seat leg on the outer side in the vehicle width direction and the reinforcing member is on the vehicle lower side than the load transmission member, a moment is generated in the vehicle seat via the load transmission member at the time of a side collision. A tensile load acts on the reinforcing member, and a reaction force against deformation of the vehicle seat in the falling direction can be obtained.

  A vehicle seat according to a sixth aspect is the vehicle seat according to the fifth aspect, wherein the vehicle seat is located on the vehicle upper side of the reinforcing member and coaxially with a rod provided between the pair of seat legs. A load transmitting member is provided.

  In the vehicle seat according to the sixth aspect, the reinforcing member is positioned on the vehicle upper side and the rod is provided between the seat legs. With this rod, it is possible to prevent the seat leg from falling down and to prevent deformation of the vehicle seat. And by providing a load transmission member coaxially with respect to this rod, the load input to the load transmission member is transmitted to the rod at the time of a side collision.

  The vehicle seat according to claim 7 is the vehicle seat according to any one of claims 1 to 6, wherein at least one of the reinforcing member and the seat leg is joined by a pin.

  In the vehicle seat according to the seventh aspect, at least one of the reinforcing member and the seat leg is joined with a pin. When the load input direction at the time of a side collision and the axis of the reinforcing member are displaced in the vehicle longitudinal direction, the joint of the reinforcing member rotates with respect to the seat leg around the pin, thereby following the deformation of the seat leg. Thus, a tensile load can be applied to the reinforcing member.

  As described above, the vehicular seat according to the first and second aspects of the present invention has an excellent effect that deformation in the falling direction at the time of a side collision is suppressed.

  The vehicle seat according to the third aspect of the present invention has an excellent effect that a tensile load can be applied to the reinforcing member at the time of a side collision to obtain a reaction force by the reinforcing member.

  In the vehicle seat according to the fourth aspect of the present invention, a tensile load acts on the reinforcing member from the initial stage where the vehicle seat tries to tilt inward in the vehicle width direction, and a load transmission loss to the reinforcing member is reduced. It has an excellent effect that can be reduced.

  The vehicle seat according to the fifth aspect of the present invention has an excellent effect that a tensile load can be efficiently applied to the reinforcing member.

  In the vehicle seat according to the sixth aspect of the present invention, at the time of a side collision, the seat leg is tilted via the load transmitting member and the rod, and a tensile load is applied to the reinforcing member to obtain a reaction force by the reinforcing member. It has an excellent effect of being able to.

  The vehicle seat according to the seventh aspect of the present invention has an excellent effect that the reaction force by the reinforcing member continues until the reinforcing member reaches the yield load.

It is a schematic perspective view which shows the principal part of the vehicle seat which concerns on this embodiment. It is a rear view which shows the principal part of the vehicle seat which concerns on this embodiment. FIG. 3 is a schematic diagram of FIG. 2, (A) and (B) show a state where a pipe and a seat leg are bolted together, (A) before deformation of a vehicle seat, and (B) a vehicle seat. FIG. (C) and (D) show a state in which the pipe and the seat leg are welded and joined, (C) shows before deformation of the vehicle seat, and (D) shows after deformation of the vehicle seat. It is. It is a graph which shows the relationship between the displacement to the vehicle width direction inside of the vehicle seat at the time of a side collision, and time, A shows the case where the structure by this embodiment is applied, B shows the structure by this embodiment. Shows the case where it is not.

  A vehicle seat 10 according to an embodiment of the present invention will be described with reference to FIGS. It should be noted that the arrows FR and UP appropriately shown in each figure indicate the forward direction (traveling direction) and upward direction of the automobile to which the vehicle seat 10 is applied, respectively, and the arrow OUT indicates the outside in the vehicle width direction. Yes.

(Configuration of vehicle seat)
FIG. 1 is a perspective view showing a main part of a vehicle seat 10 according to an embodiment of the present invention. As shown in this figure, the vehicle seat 10 includes a substantially U-shaped seat cushion frame 14 that constitutes a seat cushion 12 on which an occupant sits, and a substantially U-shaped seat back frame 18 that constitutes a seat back 16. And a pair of seat legs 20 and 22 that support the seat cushion frame 14 and the seat back frame 18 at both ends in the vehicle width direction. These shapes are schematically shown, and the shapes can be appropriately changed.

  On the vehicle rear end side of the seat legs 20 and 22, a rod 28 is stretched horizontally along the vehicle width direction. Both ends of the rod 28 pass through the seat legs 20 and 22, and the lower end of the seat back frame 18 is pivotally supported at both ends of the rod 28 to adjust the tilt angle in the vehicle longitudinal direction. It is possible. A substantially cylindrical load transmission member 24 is attached to the outside of the seat back frame 18 in the vehicle width direction so as to be coaxial with the rod 28 by welding or the like. The front end surface of the load transmitting member 24 is located on the outermost side of the vehicle seat 10 in the vehicle width direction. Here, the load transmitting member 24 has a substantially cylindrical shape, but the shape is not particularly defined. Further, the load transmission member 24 is not necessarily provided.

  Further, the vehicle rear end portion of the seat cushion frame 14 is fixed to the lower end side of the seat back frame 18, and both side portions of the seat cushion frame 14 are supported by seat legs 20 and 22. A slider 30 is provided at the lower end of the seat legs 20 and 22, and is slidable in a pair of rails 34 that extend along the vehicle longitudinal direction on the vehicle body floor 32. The position of the vehicle seat 10 in the vehicle front-rear direction can be adjusted via the slider 30.

  Here, between the seat leg 20 and the seat leg 22, a steel pipe (reinforcing member) is formed along the vehicle width direction with the rod 28 being inclined below the rod 28 along the vehicle vertical direction. ) 36 is bridged. At both ends of the pipe 36, the joined portions 38 and 40 that are formed into two laminated plates in a crushed state are bent in directions that are substantially orthogonal to the pipe body 42 and opposite to each other. .

  The joint portion 38 is joined to the seat leg 20 arranged on the outer side in the vehicle width direction with a bolt (pin) 26 together with a nut (not shown) so as to face the lower side of the vehicle. On the other hand, the joint portion 40 is joined to the seat leg 22 arranged on the inner side in the vehicle width direction by using a bolt 26 together with a nut (not shown) so as to face the upper side of the vehicle. And the joining position of the junction part 38 and the seat leg 20 is arrange | positioned adjacent to the rail 34, and the joining position of the junction part 40 and the seat leg 22 becomes a vehicle upper side rather than the joining position of the junction part 38. Is set to

(Operation and effect of vehicle seat)
Next, operations and effects of the vehicle seat according to the present embodiment will be described.

  As shown in FIGS. 1 and 2, in this embodiment, a pipe 36 is bridged between the pair of left and right seat legs 20 and 22 of the vehicle seat 10 along the vehicle width direction. The joining position of the pipe 36 and the seat leg 22 on the inner side in the vehicle width direction is set to be on the vehicle upper side than the joining position of the seat leg 20 on the outer side in the vehicle width direction. In addition, a load transmission member 24 is provided coaxially with respect to the rod 28 on the vehicle outer side of the seat back frame 18, and the front end surface of the load transmission member 24 is on the outermost side in the vehicle width direction of the vehicle seat 10. To be located.

  Thereby, the collision load F (refer FIG. 2) is input into the said load transmission member 24 through a door (illustration omitted) at the time of a side collision. As a result, a moment M (see FIG. 2) acts on the vehicle seat 10 around the lower end side of the seat leg 20. Therefore, as shown in FIGS. 3A and 3B (a schematic view of the lower part of the vehicle seat 10 as viewed from the rear side of the vehicle), the vehicle seat 10 tilts inward in the vehicle width direction. Thus, the space formed by the vehicle body floor 32, the seat legs 20, 22 and the rod 28 has a substantially parallelogram shape from a shape (see FIG. 3A) that is substantially rectangular when viewed from the vehicle rear side (see FIG. 3A). 3B) (so-called match box deformation of the vehicle seat 10).

  At this time, the distance between the joint portion 38 and the joint portion 40 of the pipe 36 is increased, and a tensile load acts on the pipe 36. Thereby, the reaction force by the said pipe 36 is obtained, and match box deformation | transformation of the vehicle seat 10 can be suppressed by this reaction force. Then, until the pipe 36 is stretched to reach a yield load, a reaction force against the deformation of the vehicle seat 10 in the falling direction can be obtained by the deformation of the pipe 36. Thereby, the deformation | transformation to the fall direction of the vehicle seat 10 at the time of a side collision can be suppressed.

  That is, as shown in FIG. 2, the position at which the collision load F is input to the vehicle seat 10 (the position where the load transmission member 24 is provided) is the joining position between the seat leg 20 and the joint portion 38 of the pipe 36. The moment M is applied to the vehicular seat 10 and the vehicular seat 10 is deformed by a match box, thereby applying a tensile load to the pipe 36 and obtaining a reaction force by the pipe 36. .

  Here, for example, when a compressive load is applied to the pipe 36, the pipe 36 is deformed due to buckling, and the pipe 36 is bent. In this state, stress concentration occurs in the central portion of the pipe 36. On the other hand, when a tensile load is applied to the pipe 36, the entire pipe 36 is subjected to a tensile load. Therefore, the yield load when the tensile load is applied to the pipe 36 is greater than the yield load when the compressive load is applied. Also gets higher.

  For this reason, when a tensile load is applied to the pipe 36, a higher reaction force can be obtained than when a compressive load is applied. Therefore, it is possible to reduce the entry speed of the door into the vehicle compartment at the time of a side collision. That is, at the time of a side collision, the impact is reduced, and the amount of displacement of the vehicle seat 10 inward in the vehicle width direction can be reduced. FIG. 4 is a graph showing the displacement of the vehicle seat in the vehicle width direction at the time of a side collision in relation to time. Here, experimental results when the configuration according to the present embodiment is applied (line indicated by A) and when the configuration according to the present embodiment is not applied (line indicated by B) are shown. This experimental result is also clear.

  And when the structure by this embodiment is not applied, in order to reduce the penetration | invasion speed | rate into the vehicle interior of the door at the time of a side collision, it becomes necessary to raise the rigidity of a door panel, for example. That is, it is necessary to separately provide a reinforcing member such as an impact beam on the door panel, which increases the mass and the cost. In other words, according to the present embodiment, the mass and cost for that amount are reduced.

  In the present embodiment, as shown in FIG. 2, the load transmission member 24 is provided coaxially with the rod 28. Thereby, at the time of a side collision, the load input to the load transmitting member 24 is transmitted to the rod 28, and the seat legs 20 and 22 are tilted via the rod 28, so that the vehicle seat 10 is deformed into a match box. A tensile load can be applied to the pipe 36.

  Furthermore, in this embodiment, at least one of the pipe 36 and the seat legs 20 and 22 is joined by a bolt (pin) 26. Thus, by joining with the bolt 26, the tightening torque can be easily controlled according to the side impact load set at the time of design. Even when the load input direction at the time of a side collision and the axis of the reinforcing member are displaced in the vehicle front-rear direction, the joints 38 and 40 of the pipe 36 rotate with respect to the seat legs 20 and 22 around the bolt 26. Thus, it is possible to follow the deformation of the seat legs 20 and 22 and apply a tensile load to the pipe 36.

  3A and 3B, the joint portion 38 of the pipe 36 is joined to the seat leg 20 on the outer side in the vehicle width direction so as to face the vehicle lower side, and the joint portion 40 is located on the vehicle upper side. It is joined to the seat leg 22 on the inner side in the vehicle width direction. Further, the joint position between the joint portion 40 and the seat leg 22 is set to be on the vehicle upper side than the joint position between the joint portion 38 and the seat leg 20.

  As a result, the pipe 36 is substantially Z-shaped when viewed from the rear of the vehicle, and the angle formed between the pipe body 42 and the joint portions 38 and 40 is an obtuse angle. That is, when the vehicle seat 10 is tilted inward in the vehicle width direction, the pipe 36 is formed so that the angle formed by the pipe main body 42 and the joint portions 38 and 40 is deformed to open. For this reason, a tensile load acts on the pipe 36 from the first stage when the vehicle seat 10 tries to tilt inward in the vehicle width direction, and the load transmission loss to the pipe 36 can be reduced. Note that the orientations of the joint portions 38 and 40 are not specified above because they may vary depending on the assembly workability.

  Further, as shown in FIGS. 3C and 3D, for example, the pipe 36 joined to the seat legs 20 and 22 is peeled off from the joining portions 38 and 40 (in the vehicle width direction of the vehicle seat 10). In the case where the joints 38 and 40 are peeled before the pipe 36 reaches the yield load due to receiving a load in the direction), the reaction force by the pipe 36 is sufficient even if a tensile load is applied to the pipe 36. It will not be used by. However, as shown in FIG. 3A, until the pipe 36 and the seat legs 20 and 22 are joined by the bolt 26, the tensile load acting on the pipe 36 reaches the yield load of the pipe 36. As shown in (B), the joined state with the seat legs 20 and 22 can be maintained.

  Here, the joining portions 38 and 40 are joined to the seat legs 20 and 22 via the bolts 26, respectively, but may be joined to the seat legs 20 and 22 using a rivet or the like. In consideration of workability, installation space, cost, etc., joining by welding may be better than joining by bolts. Furthermore, the joining method between the seat legs 20 and 22 may be different between the joining portion 38 and the joining portion 40.

  Moreover, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

10 Vehicle Seat 20 Seat Leg 22 Seat Leg 24 Load Transfer Member 26 Bolt (Pin)
28 Rod 32 Car body floor 34 Rail 36 Pipe (reinforcing member)

Claims (7)

A pair of seat legs that are spaced apart in the vehicle width direction and support the seat;
Both ends in the vehicle width direction are joined to the pair of seat legs, and the joining position with the seat leg located on the inner side in the vehicle width direction is set higher than the joining position with the seat leg located on the outer side in the vehicle width direction. A reinforcing member;
A vehicle seat having: A pair of seat legs that are spaced apart in the vehicle width direction and support the seat;
Both ends in the vehicle width direction are joined to the pair of seat legs, and the joining position with the seat leg located on the inner side in the vehicle width direction is set higher than the joining position with the seat leg located on the outer side in the vehicle width direction. , When the pair of seat legs tries to tilt inward in the vehicle width direction at the time of a side collision, a reinforcing member on which a tensile load acts in the longitudinal direction;
A vehicle seat having:   The joint position between the seat leg located on the outer side in the vehicle width direction and the reinforcing member is close to a rail that extends along the vehicle front-rear direction on the vehicle body floor and that allows the seat to move in the vehicle front-rear direction. The vehicle seat according to 1.   The joint on one end side of the reinforcing member joined to the seat leg located on the outer side in the vehicle width direction faces the vehicle lower side, and the joint on the other end side of the reinforcing member joined to the seat leg located on the inner side in the vehicle width direction The vehicle seat according to any one of claims 1 to 3, wherein the portion faces upward of the vehicle.   A load transmission member that transmits a load to the seat leg is disposed outside the seat leg that is located on the outer side in the vehicle width direction and below the joint position between the seat leg and the reinforcing member. The vehicle seat according to any one of 1 to 4.   The vehicle seat according to claim 5, wherein the load transmission member is provided coaxially with respect to a rod that is positioned on the vehicle upper side of the reinforcing member and provided between the pair of seat legs.   The vehicle seat according to claim 1, wherein at least one of the reinforcing member and the seat leg is joined by a pin.