JP4405546B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat having a function of protecting an occupant against a load input from the side of the vehicle.

  Many of the vehicle seats do not have a structure that rigidly receives the load input from the side by the frame frame, and therefore, the seat itself cannot efficiently receive the collision energy at the time of a side collision of the vehicle.

  For this reason, as a vehicle seat to cope with this, the right and left side frames of the substantially rectangular frame-shaped seat back frame are provided with strength members that connect the two frames, and the strength members near the chest height of the occupant are provided. An improved frame strength has been devised (for example, see Patent Document 1).

In this vehicle seat, a strength member having a large cross-sectional area is disposed obliquely from the outside in the vehicle width direction to the inside, and the load at the time of a side collision of the vehicle input to the chest height of the occupant is determined by the seat back frame and the strength member. In addition, the load can be efficiently transmitted to the center console portion in the center of the vehicle in the width direction.
JP 2005-153839 A

  By the way, the seat back part of the vehicle seat incorporates many functional parts such as a lumbar support for improving the ride comfort of the occupant and an active headrest for preventing lashing, and secures a living space on the rear seat side. Therefore, the thickness in the longitudinal direction of the vehicle body tends to be limited.

  However, when the above-mentioned conventional vehicle seat is adopted, the strength member having a large cross-sectional area is obliquely installed on the seat back frame, so that it is difficult to incorporate functional parts and reduce the thickness of the seat back. Is the actual situation.

  Therefore, the present invention is intended to provide a vehicle seat that can reliably receive an input load from the side of the vehicle body at the seat back portion without occupying a large space in the thickness direction of the seat back.

According to the first aspect of the present invention for solving the above-described problem, in a vehicle seat that receives an input load from the side of the vehicle body by a seat back (for example, a seat back 3 in an embodiment described later), a ridge line portion (for example, described later) In the embodiment, the ridge line portion a) extends along the vehicle width direction, and a plurality of concave and convex portions (for example, first rib 15a, second rib 15b, and third rib 15c in the embodiment described later) are made of plate material (for example, , provided in the plate member 14) will be described in the exemplary embodiment, extending the plate member seat back frame (e.g., Attach to the seat back frame 13) will be described in the exemplary embodiment, in the vehicle width direction on an upper portion of the plate member Connecting the upper cross member (for example, the upper cross member 16 in an embodiment described later), and connecting the upper cross member to the seat back frame Characterized in that by extending the outside of the exterior of the side frame.
As a result, the plate material is divided into a plurality of regions in the vertical direction by a plurality of uneven portions, and when a collision load is input to the seat back from the side of the vehicle body, the ridge line portions of the uneven portions receive the load. Become. At this time, when some of the ridge lines are crushed or bent before the other ridge lines, the shear stress acts so as to prevent crushing or bending between the adjacent ridge lines on the plate material. become. Therefore, the plate material efficiently receives the input load from the side of the vehicle body in almost the entire region.
Further, an input load from the side of the vehicle body is quickly transmitted to the upper portion of the plate material via the upper cross member, and shear stress acts on the plate material at an early stage.

According to a second aspect of the present invention, in the vehicle seat according to the first aspect, a laterally extending portion (for example, described later ) is formed on the plate member so as to extend to the outside of the side frame outside the seat back frame. Side extending portion 14b) in the embodiment, and the side extending portion is connected to an outer extending portion that extends outside the side frame of the cross member. And
As a result, the load input from the side of the vehicle body is transmitted to the entire area of the plate material via the side extending portion.

According to a third aspect of the present invention, in the vehicle seat according to the first or second aspect, a lower cross member extending in a vehicle width direction (for example, a lower cross member in an embodiment described later) is provided below the plate member. 17) is connected .
As a result, the load input from the side of the vehicle body and transmitted to the lower end side of the plate member is transmitted to the center-side member of the vehicle, such as the center console, via the lower cross member. Moreover, since the lower part of a plate material can be reinforced with a lower cross member, the deformation | transformation to the out-of-plane of a plate material can be controlled.

According to a fourth aspect of the present invention, in the vehicle seat according to the first aspect, an outer extension portion (for example, an embodiment described later) of the upper cross member that extends outward from the side frame. Provided with an upper side extending portion (for example, an upper load transmission block 24 in an embodiment described later), and the upper side extending portion extends in the vehicle width direction. A honeycomb structure in which cylindrical cross sections are arranged in parallel is characterized.
Accordingly, the periphery of the outer extension portion of the upper cross member is reinforced by the upper side extension portion, and when an input load is transmitted from the vehicle body side to the upper cross member, the outer extension portion of the upper cross member is Deformation is prevented.

According to a fifth aspect of the present invention, in the vehicle seat according to the fourth aspect , the front side portion of the upper side extending portion is extended to the outermost side in the vehicle width direction than the upper cross member. And
As a result, when the input load is transmitted from the side of the vehicle body to the upper side extending portion, the upper side extending portion is most likely to receive the load at the front side portion that extends most outward in the vehicle width direction. As a result, a load is input to the upper cross member from a position offset to the front side, and deformation in which the center side in the vehicle width direction of the upper cross member is bent forward is suppressed.

According to a sixth aspect of the present invention, in the vehicle seat according to the first aspect, the upper side of the seat back frame that extends to the outside of the vehicle side frame at a position corresponding to the upper end of the plate member. A lower portion extending outside the side frame on the vehicle outer side of the seat back frame at a position corresponding to the lower end of the plate material at a position corresponding to the lower end of the plate material. lateral extending portion (e.g., lower load transmission block 25 in the embodiment to be described later) that is extended to set only, the lower lateral projection portion in the vehicle width direction outer side than the upper lateral projection portion Thus, wherein, the input load from the side of the vehicle body is the upper end and the lower end of the plate member of the vehicle exterior side frames via the upper lateral projection portion and the lower lateral projection portion Early transmitted to corresponding site It becomes so that.

According to the first aspect of the present invention, the plate material that is partitioned into a plurality of regions in the vertical direction by the ridge line portion extending in the vehicle width direction is attached to the seat back frame, and the vehicle body side is almost entirely in the plate material. Therefore, the side impact load can be reliably received at the seat back portion without sacrificing the space in the thickness direction of the seat back. Therefore, when the present invention is adopted, it is possible to easily cope with the demand for addition of functional parts to the seat back and the thinning of the seat back.
In addition, according to the present invention, since the input load from the side of the vehicle body is quickly transmitted to the upper portion of the plate material via the upper cross member, shear stress is applied to the plate material at an early stage of load input, The side impact load can be received efficiently at the seat back portion.

According to the second aspect of the present invention, the laterally extending portion that extends to the outside of the side frame on the outside of the vehicle is provided, so that the load input from the side of the vehicle body can be more quickly applied to the entire area of the plate material. It becomes possible to communicate.

According to the third aspect of the present invention, the load input to the sea back from the side of the vehicle body can be reliably transmitted to the member on the center side in the width direction of the vehicle via the lower cross member, and the lower cross Since the member can reinforce the lower part of the plate material and restrict deformation of the plate material to the out-of-plane state, the collision energy can be efficiently absorbed by the vehicle body.

According to the invention described in claim 4 , since the periphery of the outer extension portion of the upper cross member is reinforced by the upper side extension portion and deformation of the outer extension portion is prevented, the input from the side of the vehicle body The load can be efficiently transmitted to the upper part of the plate material.

According to the invention described in claim 5 , since the load is input to the upper cross member from the position offset to the front side, the center of the upper cross member in the vehicle width direction regardless of the shape of the contact portion on the side of the vehicle body or the like. The deformation of the side bending forward can be suppressed, and the input load can be stably received by the plate material.

According to the invention described in claim 6 , the input load from the side of the vehicle body is applied to the upper end portion of the plate material in the side frame outside the vehicle via the upper side extending portion and the lower side extending portion. Therefore, stable shear stress can be generated in the plate material from the early stage of load input.

Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the same reference numerals are assigned to the same parts, and a part of the overlapping description is omitted.
First, the first embodiment shown in FIGS. 1 to 4 will be described.
1 and 2 are a front view and a rear view of the vehicle seat 1 according to the present invention installed in a vehicle, and FIGS. 3 and 4 show the vehicle seat 1 as viewed from obliquely rearward on the upper right side. It is the perspective view seen from the perspective view and the left upper diagonally backward.

  The vehicle seat 1 includes a seat cushion 2 that supports the occupant's buttocks, a seat back 3 that is connected to the rear end of the seat cushion 2 and supports the occupant's waist and chest (back), and the seat back 3. And a headrest 4 that supports the head and neck of the occupant.

  The seat cushion 2 includes a front cross member 5 that extends in the vehicle width direction at the front end portion and the rear end portion, and a cushion frame 7 to which the rear cross member 6 is attached. 8 is slidably attached to the vehicle body floor 9 in the front-rear direction. 1 and 2, reference numeral 10 denotes a side sill provided at the lower end side portion of the vehicle body, 11 denotes a center pillar standing substantially at the center of the vehicle body side portion, and 12 denotes a vehicle body floor 9 It is a center console fixedly arranged in the center of the vehicle width direction.

  As shown in FIG. 1, the seat back 3 includes a substantially rectangular frame-shaped seat back frame 13 including an upper frame 13 a, a lower frame 13 b, and left and right side frames 13 c and 13 d, and a lower end of the seat back frame 13. Is hinged to the rear end of the cushion frame 7 so as to be tiltable. Support frames 4a and 4a of the headrest 4 are attached to the center position in the width direction of the upper frame 13a of the seat back frame 13 so as to be movable up and down. In the case of this embodiment, the headrest 4 employs an active headrest for preventing occupants from whipping at the time of a rear collision.

  A plate member 14 having a substantially L-shape in front view is attached to the back side of the seat back frame 13. The plate member 14 includes an upper frame 13a and a lower frame 13b of the seat back frame 13, a substantially rectangular plate main body portion 14a having a peripheral edge coupled to the left and right side frames 13c and 13d, and a vehicle having a plate main body portion 14a. It is comprised from the side extension part 14b extended in the substantially L shape outside the outer side frame 13c. In addition, the plate member 14 is provided with a plurality of ribs 15a, 15b, 15c (uneven portions) in which the ridge line portion a extends in the vehicle width direction, arranged in the vertical direction, and a central rib 15a (hereinafter, “ A substantially cylindrical upper cross member 16 extending in the vehicle width direction is integrally attached to the inside of the first rib 15a ". The upper cross member 16 extends in the vehicle width direction substantially at the height position of the chest of the seated occupant. A region forming the plate main body portion 14 a at the lower edge of the lower rib 15 b (hereinafter referred to as “second rib 15 b”) is integrally coupled to the lower frame 13 b of the seat back frame 13. Similarly, an area forming the plate main body portion 14 a at the upper edge of the upper rib 15 c (hereinafter referred to as “third rib 15 c”) is integrally coupled to the upper frame 13 a of the seat back frame 13.

  A lower cross member 17 extending in the vehicle body width direction is integrally attached at a position directly below the connecting portion at the lower edge of the plate member 14 in the lower frame 13b of the seat back frame 13. The lower cross member 17, together with the rear cross member 6 on the seat cushion 2 side, extends in the vehicle width direction substantially at the level of the waist of the seated occupant, the vehicle outer end faces the center pillar 11, The inner end portion faces the side surface of the center console 12.

  Further, of the plate member 14, a side extension portion 14 b that goes around the back side of the side frame 13 c and extends to the outside of the vehicle has a bulge to the front side of the vehicle body and is located outside the vehicle of the side frame 13 c. A plurality of load receiving portions 18... Having a substantially triangular cross section disposed on the side portion are integrally formed. The load receiving portions 18 are in contact with the side surfaces on the vehicle outer side of the side frames 13c at the end portions on the inner side of the vehicle, and a load is applied to the side extending portions 14b via the center pillar 11 or the like at the time of a side collision. When input, the load is transmitted to a wide range in the vertical direction of the side frame 13c.

  In the above configuration, when a collision load is input to the side surface of the vehicle employing the vehicle seat 1 according to the present invention, the center pillar 11 deformed by the collision is formed on the side of the upper cross member 16 and the plate member 14 of the seat back 3. A collision load is input to these at an early timing before coming into contact with the side extension 14b and before the occupant and the center pillar 11 come into contact with each other. At this time, the collision load is transmitted to the side frame 13c of the seat back frame 13 via the load receiving portion 18 of the side extending portion 14b, and the load in the width direction of the plate member 14 is centered on the upper cross member 17. Is transmitted. Thus, when a load is input to the plate member 14 using the upper cross member 16 as an input point of the shear load, stress in the shearing direction acts in a plurality of regions partitioned by the ridge line portions a of the ribs 15a, 15b, and 15c. The shear stress is transmitted to the upper frame 13a and the lower frame 13b of the seat back frame 13. Here, since the plate body portion 14a has peripheral edges coupled to the upper frame 13a, the lower frame 13b, and the left and right side frames 13c and 13d of the seat back frame 13, the stress in the shearing direction is applied to the plate body portion 14a. It will not slip out of the plane. In addition, since the lower end of the plate member 14 is reinforced by the lower cross member 17 extending in the ridge line direction of the ribs 15a, 15b, and 15c, the plate member 14 applies a load almost in the entire region without the shear load falling downward. I will take it.

  The collision load thus transmitted to the lower frame 13b is transmitted to the vehicle body floor 9 via the cushion frame 7 and the seat rail 8, and also to the center console 12 via the lower cross member 17. The Therefore, the collision load is absorbed by the vehicle body floor 9 and the center console 12 without greatly deforming the seat back frame 13.

  In this vehicle seat 1, the plate material 14 attached to the seat back frame 13 is partitioned into a plurality of regions by ridges a extending in the vehicle width direction of the ribs 15 a to 15 c, and acts in the plurality of regions. Since the load can be received in the entire region of the plate material 14 by the stress in the shear direction, the collision load from the side of the vehicle body is applied to the seat back 3 portion while having a thin structure that does not occupy a large space in the thickness direction of the seat back 3. It can be received with certainty. Therefore, when this vehicle seat 1 is adopted, functional parts such as an active headrest and a lumbar support can be easily incorporated into the seat back 3, and the demand for thinning the seat back 3 can be met. .

  And in this vehicle seat 1, since the peripheral part whole region of the plate material 14 is couple | bonded with the frames 13a-13d of the four sides of the seat back frame 13, the deformation | transformation to the out-of-plane of the plate material 14 can be prevented. Stress in the shear direction can be reliably generated in the material 14. As a result, the plate member 14 and the seat back frame 13 cooperate to increase the strength, and the side collision load can be received more reliably.

  In the case of the vehicle seat 1, since the upper cross member 16 is disposed at the chest level of the seated occupant, the side collision load input at the height is directly received by the upper cross member 16 having high strength. In addition, the load can be reliably transmitted to the vehicle body floor 9 and the center console 12 via the plate member 14 and the seat back frame 13.

Further, in the vehicle seat 1, the plate member 14 is provided with the side extending portion 14 b extending to the outside of the side frame 13 c, so that the side collision load is quickly transmitted by the plate member 14. Can do.
In particular, in this embodiment, the laterally extending portion 14b of the plate material 14 is provided with a load receiving portion 18 that directly transmits a load from the center pillar 11 to the outer side surface of the side frame 13c. Similarly, the side collision load can be quickly transmitted to the seat back frame 13 as well.

  In the case of the vehicle seat 1, a lower cross member 17 is provided on the lower frame 13 b positioned at the lower edge of the plate member 14, and an end of the lower cross member 17 is opposed to the side surface of the center console 12. And the lower cross member 17 can reinforce the lower part of the plate member 14 and restrict the deformation of the plate member 14 to the lower surface, so that the side surface input to the seat back frame 13 can be controlled. The collision load can be reliably transmitted to the center console 12 via the lower cross member 17.

  In the above embodiment, the lower cross member 17 is attached to the seat back frame 13, but the lower cross member 17 may be coupled to the lower end of the plate member 14.

Next, a second embodiment shown in FIGS. 5 to 9 will be described.
5 and 6 are a perspective view and a rear view of the vehicle seat 101 according to the present invention installed in the vehicle.
As in the first embodiment, the vehicle seat 101 includes a seat cushion 2, a seat back 3, and a headrest 4, and the seat cushion 2 is attached to the vehicle body floor 9 via seat rails 8 and 8. . The seat back 3 includes a seat back frame 13 having a substantially rectangular frame shape including an upper frame 13a, a lower frame 13b, and left and right side frames 13c and 13d, and a lower end of the seat back frame 13 is a rear end portion of the seat cushion 2. The hinge shaft 20 is pivotally connected to each other.

  A plate member 114 having a substantially rectangular shape in front view is attached to the back side of the seat back frame 13. In the case of this embodiment, the plate material 114 is configured by joining two plates each having a plurality of corrugated ribs 115 (uneven portions) in which the ridge line portion a extends in the vehicle width direction. .

7 and 8 are a rear view and a side view showing how the plate material 114 is attached to the seatback frame 13.
As shown in these drawings, both side portions of the plate material 114 are welded and fixed to brackets 21a and 21b having substantially L-shaped cross sections attached to the left and right side frames 13c and 13d. A cylindrical upper cross member 22 extending in the vehicle width direction is fixed to the left and right brackets 21a and 21b by welding. As for this upper cross member 22, the side edge part of the vehicle outer side penetrates the bracket 21a and protrudes to the outer side of the side part frame 13c. In the case of this embodiment, the plate member 114 is disposed substantially within the width of the side frames 13c and 13d on both sides, and the upper end portion is fixed to the upper cross member 22 at substantially the chest height of the occupant below the upper frame 13a. Has been.

In this embodiment, a cylindrical lower cross member 23 is coaxially provided around the hinge shaft 20.
FIG. 9 is a rear view showing a state in which the lower cross member 23 is attached to the seat back frame 13.
As shown in the figure, the lower cross member 23 is welded and fixed at one end side to the side frame 13c outside the vehicle in a cantilevered state, and the other end faces the side surface of the side frame 13d inside the vehicle in a non-contact state. It is like that. The other end of the lower cross member 23 abuts on the side frame 13d on the vehicle inner side when a large load is input from the side of the vehicle body to the side frame 13c on the vehicle outer side, thereby applying the load to the side frame 13d. To communicate. Then, the lower end of the plate material 114 is fixed to the lower cross member 23 by welding.

An upper load transmission block 24 (upper portion) for transmitting an input load from the side of the vehicle body to the side frame 13c is located at a position corresponding to the upper end and the lower end of the plate member 114 in the side frame 13c. Side extension portions) and a lower weight transmission block 25 (lower side extension portions) are attached. Each of the upper load transmission block 24 and the lower load transmission block 25 has a honeycomb structure in which a plurality of cylindrical cross sections extending in the vehicle width direction are arranged in parallel, and the whole is integrally formed of resin. Among these, the upper load transmission block 24 is formed so as to bulge out in a substantially L shape so that the rear end edge wraps around the rear side of the side frame 13c . The rear end edge of the upper load transmission block 24 that wraps around to the rear of the side frame 13 c is abutted against the side end surface of the plate material 114, and the side extension portion of the upper cross member 22 that protrudes from the plate material 114. It covers 22a (outside extension part) over a longitudinal direction.

  5 and 6, reference numeral 26 denotes a console reinforcing member disposed in a center console (not shown). The console reinforcing member 26 is a connection that connects the left and right side walls 26a and 26b of the honeycomb structure similar to the upper load transmission block 24 and the lower load transmission block 25 and the upper regions of the side walls 26a and 26b to each other. These walls 26c are fixed to the floor tunnel 27 in a superposed state in the center console.

  In the above configuration, when a collision load is input from the side of the vehicle and the side wall of the vehicle body such as the center pillar 11 is deformed in the direction of the seat back 3, the load from the side wall passes through the upper load transmission block 24 and the lower load transmission block 25. To the side frame 13c, and to the side extension 22a of the upper cross member 22 surrounded by the upper load transmission block 24. At this time, the collision load input to the lower load transmission block 24 is transmitted to the vehicle inner side frame 13d via the lower frame 13b, and the vehicle inner end of the lower cross member 23 is connected to the vehicle inner side portion. The load is transmitted to the lower side of the side frame 13d through the lower cross member 23 in contact with the frame 13d. When the collision load is transmitted below the side frame 13d in this way, the lower end of the side frame 13d comes into contact with the center console, and the input load is supported by the floor tunnel 27 via the console reinforcing member 26 inside. Will come to be. On the other hand, the collision load input to the upper cross member 22 is transmitted to the upper end portion of the plate material 114, and stress in the shear direction is generated in a plurality of regions defined by the ridge line portions a of the ribs 115 of the plate material 114. Let Thereby, the input load can be received in almost the entire area of the plate material 114.

  Further, the plate member 114 is coupled to the side frames 13c and 13d at both sides, and has an upper end coupled to the upper cross member 22 and a lower end coupled to the lower frame 13b and the lower cross member 23. When the collision load is input, the stress in the shearing direction is surely generated without the load coming out. Also in this embodiment, the collision load is absorbed by the vehicle body floor 9 and the center console without greatly deforming the seat back frame 13.

  Also in this vehicle seat 101, the plate material 114 attached to the seat back 3 is partitioned into a plurality of regions by the ridge line portions a of the plurality of ribs 115... Therefore, the collision load from the side of the vehicle body can be reliably received at the seat back 3 portion without restricting the incorporation of functional parts into the seat back 3 and the thinning of the seat back 3.

  In the case of the vehicle seat 101, the upper end of the plate member 114 is not extended to the upper frame 13a, but is extended to the upper cross member 22 that is positioned substantially at the chest level of the seated occupant. Therefore, the impact load absorption performance and the weight reduction of the seat back 3 can be well balanced.

Further, in the vehicle seat 101, the upper cross member 22 is provided with a side extending portion 22a that protrudes outward from the side frame 13c, so that a collision load from the side of the vehicle body is applied to the plate material 114. Can be quickly transmitted as a load in the shear direction.
In particular, in the case of this embodiment, the upper load transmission block 24 for transmitting a collision load from the side of the vehicle body to the side frame 13c surrounds the laterally extending portion 22a of the upper cross member 22. Therefore, it is possible to restrict the deformation of the side extending portion 22a at the time of load input and to transmit the collision load to the plate material 114 as desired at all times.

10 and 11 show a modification of this embodiment. FIG. 10 is a schematic plan view showing the vehicle seat 101A and the passenger m seated on the rear seat. FIG. 11 shows the vehicle seat. It is a one part perspective view of 101A.
The vehicle seat 101A of this modification is different in the shape of the rib 115A formed on the plate material 114A. That is, in the example described above, each rib 115 has a constant protruding height in the vehicle width direction, but the rib 115A in this modified example has the highest protruding height Hc in the center in the vehicle width direction. The protrusion height Hs ahead of the knee position n of the occupant m seated in the rear seat is set to be the lowest.

  The vehicle seat 101A according to this modified example is configured such that the protruding height of the rib 115A is set to be highest at the substantially center in the vehicle width direction, so that the knee material for the passenger m in the rear seat is not reduced. The buckling strength of 114A (seat back 3) can be increased.

Next, a third embodiment shown in FIGS. 12 to 16 will be described.
FIG. 12 is a rear view of the vehicle seat 201 of this embodiment, and FIG. 13 is a cross-sectional view of the upper load transmission block 224 attached to the side frame 13c cut in a substantially horizontal direction.
As in the second embodiment, the vehicle seat 201 includes a plate member 114 attached to the seat back frame 13, and an upper cross member 22 and a lower cross member 23 provided above and below the plate member 114, and side portions. An upper load transmission block 224 and a lower load transmission block 25 are provided at positions corresponding to the upper and lower ends of the plate material 114 on the outer surface of the frame 13c. Similar to the second embodiment, the upper load transmission block 224 is disposed so as to surround the laterally extending portion 22a of the upper cross member 22, but the extension length to the outer side in the vehicle width direction is the front-rear direction. The plan view is stepped so that the extension length of the front region 224a is longer than the extension length of the rear region 224b.

A laterally extending portion 22a of the upper cross member 22 is disposed in the rear region 224b of the upper load transmission block 224, and a cylindrical sub cross member 30 that is a strength member is provided in the front region 224a. Arranged along the width direction.
Further, the lower load transmission block 25 is set to extend outward in the vehicle width direction by a set length L1 with respect to the upper load transmission block 224.

In the above configuration, when a collision load is input from the side portion of the vehicle and the side wall of the vehicle body is deformed in the direction of the seat back 3, the side wall first comes into contact with the lower load transmission block 25 and thereafter the front of the upper load transmission block 224. It abuts on the region 224a. Accordingly, the lower end side of the seat back frame 13 is pressed between the side wall of the vehicle body and the center console, and in this state, a collision load is input to the upper end portion of the plate member 114 via the upper cross member 22. At this time, in the plate material 114, stress in the shearing direction is generated in a plurality of regions partitioned by the ridge line portions a of the ribs 115. Therefore, in the vehicle seat 201, the load can be received efficiently over almost the entire area of the plate material 114.
In particular, in the case of this embodiment, the lower load transmission block 25 extends outward in the vehicle width direction with respect to the upper load transmission block 224 by a set length L1. Since the lower end of the seat back frame 13 is pressed down, the load can be reliably received by the plate material 114 in a state where the fall of the seat back 3 is restricted.

  Further, in the vehicle seat 201, the upper load transmission block 224 is formed in a stepped shape so that the extension length of the front region 224a is longer than the extension length of the rear region 224b. At the time of a collision from the side, the vehicle body side wall always comes into contact with the front region 224a on the upper load transmission block 224 that is offset forward with respect to the upper cross member 22, and the center side in the vehicle width direction of the upper cross member 22 is the front side. The deformation that bends in a straight line is suppressed. That is, since a load is input to the laterally extending portion 22a of the upper cross member 22 from a position offset forward, as shown in FIGS. 14, 15, and 16, the side wall of the vehicle body (for example, the center pillar 11) Regardless of the deformed shape, a moment is applied to the upper cross member 22 to bend the center side in the vehicle width direction rearward, and as a result, the bending deformation of the front seat in the occupant m direction is suppressed. Therefore, the input load from the side can be always stably received by the plate material 114.

  In the case of this embodiment, since the cylindrical sub cross member 30 is provided in the front region 224a of the upper load transmission block 224, the load input to the front region 224a is transmitted to the side frame 13c at an early stage. be able to.

FIG. 17 shows a fourth embodiment of the present invention.
In this embodiment, the density of the honeycomb structure in the upper region 325a of the lower load transmission block 325 provided on the side surface on the lower end side of the side frame 13c is set higher than the density of the honeycomb structure in the lower region 325b.

For this reason, in the case of this embodiment, the density of the lower load transmission block 325 when the center region of the center pillar 11 (the region separated from the high-strength side sill 10) first collapses during a collision from the side of the vehicle body. The load can be transmitted to the seat back frame 13 early and reliably in the upper region 325a having a high height. And since the density of the lower area | region 325b is set low with respect to the upper area | region 325a in which the center pillar 11 falls down early at the time of a collision, the lower load transmission block 325 can reduce the weight of the whole.
In this embodiment, the density of the upper region 325a of the lower load transmission block 325 is set to be higher than the density of the lower region 325b. However, the portion where the density is increased is not limited to this. It is possible to appropriately set a site that enters the site or a site where local entry is likely to occur. Similarly, a high-density part and a low-density part may be set for the upper load transmission block.

18 and 19 show a fifth embodiment of the present invention.
In this embodiment, the end portion on the vehicle outer side of the lower load transmission block 425 provided on the side surface on the lower end side of the side frame is configured by a hemispherical curved surface 425a.
For this reason, even when the base portion side of the center pillar 11 is inclined during a side collision, the center pillar 11 comes into contact with the curved surface 425a of the lower load transmission block 425, so that the collision load is transmitted in the vehicle width direction of the seat back 3. Can be transmitted reliably.

  FIG. 20 shows a modified example of the fifth embodiment. In the modified example, the end of the lower load transmission block 525 has a semi-cylindrical cross section in which a curved surface 525a is formed in the longitudinal direction of the vehicle body. Has been. In this case, even if the center pillar inclines in the front-rear direction during a collision, the collision load can be reliably transmitted in the vehicle width direction of the seat back.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

The front view which shows the frame | skeleton of the vehicle seat of 1st Embodiment of this invention. The rear view of the vehicle seat of the embodiment. The vehicle seat perspective view of the embodiment. The vehicle seat perspective view of the embodiment. The perspective view which shows the frame | skeleton of the vehicle seat of 2nd Embodiment of this invention. The rear view of the vehicle seat of the embodiment. The rear view of the vehicle seat of the embodiment. The side view of the vehicle seat of the embodiment. The rear view of the vehicle seat of the embodiment. Typical sectional drawing of the vehicle seat which shows the modification of the embodiment. The rear view of the vehicle seat of the modification. The rear view which shows the frame | skeleton of the vehicle seat of 3rd Embodiment of this invention. Sectional drawing of the vehicle seat of the embodiment. A typical sectional view of a vehicular seat of the embodiment. A typical sectional view of a vehicular seat of the embodiment. A typical sectional view of a vehicular seat of the embodiment. Typical sectional drawing of the vehicle seat of 4th Embodiment of this invention. The perspective view of the vehicle seat of 5th Embodiment of this invention. The typical top view of the vehicle seat of the embodiment. The perspective view of the vehicle seat which shows the modification of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,101,101A, 201 ... Vehicle seat 3 ... Seat back 13 ... Seat back frame 13a ... Upper frame 13b ... Lower frame 13c, 13d ... Side frame 14, 114 ... Plate material 14b ... Side extension 15a ... First rib (uneven portion)
15b ... 2nd rib (uneven part)
15c ... 3rd rib (uneven part)
16 ... Upper cross member 17 ... Lower cross member 18 ... Load receiving part 22 ... Upper cross member 22a ... Side extension part (outer extension part)
24, 224 ... Upper load transmission block (upper side extension)
25, 325, 425, 525 ... Lower load transmission block (lower side extension)
115 ... rib (uneven portion)
a ... Ridge line

Claims (6)

In the vehicle seat that receives the input load from the side of the vehicle body by the seat back,
A plurality of uneven portions ridgeline portion extends along the vehicle width direction to the plate member, Installing the plate member to the seat back frame,
An upper cross member extending in the vehicle width direction is connected to an upper portion of the plate member, and the upper cross member is extended to the outside of the side frame outside the vehicle of the seat back frame. . The plate member is provided with a laterally extending portion that extends to the outside of the side frame on the vehicle exterior side of the seat back frame, and the laterally extending portion and the cross member on the outside of the side frame. The vehicle seat according to claim 1, wherein the extended outer extension portion is connected . The vehicle seat according to claim 1, wherein a lower cross member extending in a vehicle width direction is connected to a lower portion of the plate material . Of the upper cross member, an upper side extending portion that covers an outer extending portion that extends outward from the side frame is provided, and the upper side extending portion extends in the vehicle width direction. 2. The vehicle seat according to claim 1, wherein the vehicle seat has a honeycomb structure in which a plurality of cylindrical cross sections are arranged in parallel . The vehicle seat according to claim 4 , wherein a front side portion of the upper side extending portion is extended most outward in the vehicle width direction with respect to the upper cross member . An upper side extending portion is provided at a position corresponding to the upper end of the plate material and extends to the outside of the side frame on the vehicle outer side of the seat back frame, and the seat is positioned at a position corresponding to the lower end of the plate material. A lower side extending portion extending outside the side frame on the vehicle outer side of the back frame is provided, and the lower side extending portion is extended outward in the vehicle width direction from the upper side extending portion. The vehicle seat according to claim 1 .

Images