JP2016185752A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a planar body fit to a rear side of a seat pad deformed into a recess shape while ensuring the strength of the planar body.SOLUTION: A vehicle seat, in which a holding body 12 is attached into a seat frame, and a planar body 14 held by the holding body 12 supports a seat pad that has been deformed into a recess shape when a passenger is seated from a rear side of the seat pad, is configured such that a first region 21 and second regions 22r, 22l pressed strongly by the seat pad that has been deformed into the recess shape, compared with the first region 21 are formed continuously in the planar body 14 in a planar direction, and the second regions 22r, 22l are depressed into the recess shape in a direction in which the seat pad presses the first and second regions, compared with the first region 21, in a state in which the passenger is seated as a reference.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat including a seat frame, a seat pad, and a support member attached to the seat frame and supporting the seat pad.

  In this type of vehicle seat, a support member may be attached to a frame-like seat frame forming a seat skeleton to support a seat pad. This support member has a frame-shaped holding body attached in the frame of the seat frame and a planar sheet-like body held by the holding body. And a planar body supports a seat pad from the back surface side, deform | transforming moderately by own elasticity. In this type of configuration, the seat pad may be greatly recessed and deformed at a portion that is relatively strongly pressed by the occupant. For this reason, from the viewpoint of improving the seating property of the seat, it is desired that the planar body is fitted to the back surface of the sheet body in a shape that follows the concavely deformed seat pad.

  For example, in the technique disclosed in Patent Document 1, the seat back includes a substantially inverted U-shaped frame body, a shaft frame, and a cloth material when viewed from the front. The shaft frame is a wire material corresponding to a holding body, and is disposed on each of the left and right sides of the frame body and extends in the vertical direction of the seat. The cloth fabric is a substantially rectangular surface material corresponding to a planar body in front view, and is stretched between the left and right shaft frames so as to support the seat pad. And the slit which is a linear cut | interruption is provided in the upper part and the lower part of cloth fabric, respectively, and is extended in a sheet | seat width direction. In the known technology, the cloth fabric is divided into a waist equivalent part, a buttock equivalent part, and a back equivalent part of the occupant by a pair of slits. When the occupant is seated, the seat pad is supported by the cloth from the back side, and at this time, the seat pad is strongly pressed, for example, by the occupant's lower back part, and is partially dented and deformed. Therefore, in the known technique, the waist portion corresponding to the cloth fabric has a shape following the concavely deformed seat pad while being greatly deformed and deformed compared to the other portions while widening each slit. In this way, the cloth fabric can be fitted to the back surface thereof in a shape that follows the recessed seat pad.

Japanese Patent Laid-Open No. 10-146240

  However, in the configuration of the known technology, the cloth fabric may break due to the slit that is a break, and the strength of the support member is slightly lacking. The present invention was devised in view of the above points, and the problem to be solved by the present invention is to fit the back surface of the seat pad that has been deformed into a recess while securing the strength of the surface material. There is to make it.

  As means for solving the above-mentioned problems, a vehicle seat of the first invention includes a frame-like seat frame forming a seat skeleton, a seat pad that forms a seat outer shape and can elastically support an occupant, and a seat pad. And a supporting member for supporting. In the present invention, the support member includes a planar sheet-like body that can support the seat pad and a frame-like holding body that can hold the planar body. Then, a holding body is attached within the frame of the seat frame, and the planar body held by the holding body supports the seat pad that is recessed and deformed when the occupant is seated from the back side. In this type of configuration, it is desirable to fit the planar body to the back surface of the seat pad that has been deformed in a concave manner while ensuring the strength of the planar body.

  Therefore, in the present invention, on the basis of the state in which an occupant is seated on the seat pad, the planar portion has a first portion and a second portion that is pressed more strongly than the first portion from the recessed seat pad. The second part is formed in a concave shape in the direction pressed from the seat pad as compared with the first part. In this invention, the intensity | strength of a planar body can be ensured suitably by forming a 1st site | part and a 2nd site | part continuously in a surface direction. Then, the recessed and deformed seat pad is supported by a first portion that is appropriately bent and deformed and a second portion that is in a concave shape. As described above, in the present invention, by providing the first portion and the second portion in consideration of the degree of pressing from the seat pad, the planar body can be suitably fitted to the back surface of the seat pad that has been deformed. .

  The vehicle seat of the second invention is the vehicle seat of the first invention, wherein the planar body is formed of a resin that is softened by heating, and the second portion is softened by heating and then formed into a hollow shape. Being done. In this invention, the 2nd site | part is shape | molded through heat processing, Therefore The 2nd site | part of a desired shape can be accurately formed in the desired position of a planar body.

  The vehicle seat of the third invention is the vehicle seat of the first invention, wherein the second part is formed by shrinking the planar body into a pleated shape in the surface direction and receiving a pressure from the seating side to form a depression. The dent can be deformed. In the present invention, since the second portion is structurally recessed, a material having excellent strength can be used because the degree of freedom of material selection for the planar body is expanded.

  According to the first aspect of the present invention, the planar body can be fitted to the back surface of the seat pad that has been deformed in a concave manner while ensuring the strength of the planar body. Further, according to the second invention, the planar body can be suitably fitted to the back surface of the seat pad that has been deformed in a dent. And according to 3rd invention, the intensity | strength of a planar body can be ensured more reliably.

It is a partially exploded perspective view of a vehicle seat. It is a perspective view of a supporting member. It is sectional drawing of a part of seat cushion at the time of passenger | crew seating. 6 is a perspective view of a support member according to Embodiment 2. FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. In each figure, the reference symbol F is in front of the vehicle seat, reference symbol B is in the rear of the vehicle seat, reference symbol UP is in the upper part of the vehicle seat, reference symbol DW is in the lower part of the vehicle seat, reference symbol R is on the right side of the vehicle seat, A symbol L is attached to the left side of the sheet. In FIG. 4, for the sake of convenience, the fold portion forming the second portion is exaggerated. The vehicle seat 2 in FIG. 1 includes a seat cushion 4, a seat back 6, and a headrest 8. Each of these seat constituent members includes a seat frame (4F, 6F, 8F) forming a seat skeleton, a seat pad (4P, 6P, 8P) forming a seat outer shape, and a seat cover (4S, 6S, 8S). In the present embodiment, the lower portion of the seat back 6 is connected to the rear portion of the seat cushion 4 (details will be described later) in a tiltable manner, and the headrest 8 is disposed on the upper portion of the standing seat back 6.

<Example 1>
1, the seat cushion 4 includes the above-described basic configurations 4F, 4P, and 4S, and the support member 10 including the holding body 12 and the planar body 14 (details of each member will be described later). In this embodiment, the seat pad 4P is disposed on the seat frame 4F via the support member 10 and then covered with the seat cover 4S. At this time, as will be described later, the holding body 12 is assembled in the frame of the seat frame 4F, and the sheet pad 4P is supported from the back side by the planar body 14 held by the holding body 12.

  Thus, in this embodiment, referring to FIG. 3, the seat pad 4P elastically supports the occupant CM while being recessed and deformed. At this time, the seat pad 4P is a portion of the occupant's buttocks, in particular, where the sciatic bone is disposed ( In a later-described buttock support portion HP), a large dent is deformed. In this type of seat configuration, it is desired to fit the planar body 14 to the back surface of the seat pad 4P that has been deformed in a concave manner from the viewpoint of improving seating performance of the seat. Therefore, in the present embodiment, with the configuration described later, the planar body 14 is fitted to the back surface of the seat pad 4P that has been deformed in a concave manner while ensuring the strength of the planar body 14. Hereinafter, each configuration will be described in detail.

[Basic configuration]
Here, the seat cover 4S is a bag-like member that can cover the seat pad 4P with reference to FIG. 1 and FIG. 3, for example, a fabric (woven fabric, knitted fabric, non-woven fabric) or leather (natural leather, synthetic leather). Can be configured. The seat pad 4P is a member that elastically supports the occupant CM, and can be formed of a resin member such as polyurethane foam (density: 10 kg / m ^{3 to} 60 kg / m ³ ). The seat pad 4P is a substantially rectangular member in a top view, and when seating an occupant CM, which will be described later, a portion that supports the occupant's buttocks at the rear portion of the seat pad 4P (hereinafter referred to as a heel support portion HP) is relatively greatly recessed and deformed. .

  The seat frame 4F is a substantially rectangular frame body as viewed from above with reference to FIG. 1, and includes a front frame 4a, a pair of side frames 4b, and a rear frame 4c. The front frame 4a is a flat plate member that constitutes the front skeleton of the seat cushion 4, and includes a plurality of claw portions 4d that can lock a support member 10 described later. Each of the plurality of claw portions 4d is a flat plate portion having a substantially inverted L shape when viewed from the side, and is formed on the upper surface of the front frame 4a at an appropriate interval and in the seat width direction (arrow line directions L and R in FIG. 1). Placed in parallel. The pair of side frames 4b is a flat plate member that constitutes the side skeleton of the seat cushion 4, and is disposed so as to face each other on the side of the seat. In the present embodiment, a bracket 9 which is a substantially rectangular flat plate material is provided at the rear end of each side frame 4b. And the lower part of the seat frame 6F of the seat back 6 is connected to each bracket 9 via the reclining mechanism RM so that it can be tilted. The rear frame 4c is a bar that reinforces the rear portion of the seat frame 4F, and can be arranged in a bridging manner on the rear side of the pair of side frames 4b.

[Support member]
With reference to FIGS. 1 to 3, the support member 10 is a member that supports the seat pad 4 </ b> P within the frame of the seat frame 4 </ b> F, and includes a holding body 12 and a planar body 14. The holding body 12 is a member that can be disposed in the frame of the seat frame 4F while holding a planar body 14 described later, and includes a front frame portion 12a, a pair of side frame portions 12b, and a pair of rear frame portions 12c. Have. The front frame portion 12a is formed of a bar extending in the sheet width direction with reference to FIG. 2, and can hold the front portion of the planar body 14 described later by forming one side of the front portion of the holding body 12. It is. The pair of side frame portions 12b are each formed of a bar material extending in the front-rear direction of the seat, and can hold one side of the side of the holding body 12 and the rear side of the side of the planar body 14. . The pair of rear frame portions 12c are each formed of a bar material that is bent into a substantially rectangular shape when viewed from above, and the pair of rear frame portions 12c are arranged in parallel in the sheet width direction of the holding body 12. The rear part of the planar body 14 can be held on one side of the rear part. Each rear frame portion 12c is provided with a hook portion 12d that can be hooked to the rear frame 4c. The hook portion 12d is substantially semicircular with the middle of each rear frame portion 12c facing upward. It can be formed by curving.

  The planar body 14 is a member that supports the seat pad 4P from the back surface side with reference to FIG. 2, and has a first portion 21 and a pair of second portions 22r and 22l described later. The planar body 14 is a substantially rectangular planar material when viewed from above, and has a dimension capable of crossing the holding body 12 in the sheet width direction. Further, the dimension of the planar body 14 in the front-rear direction of the seat is longer than the side frame portion 12b described above, and can cover the range from the front frame 4a to the vicinity of the rear frame 4c. In this embodiment, the planar body 14 is held in the frame of the holding body 12 and is disposed so as to support the seat pad 4P. At this time, the method for attaching the planar body 14 to the holding body 12 is not particularly limited. For example, in this embodiment, both ends of the planar body 14 viewed in the sheet width direction of the planar body 14 are wound around the side frame portion 12b while being folded inward on the back side of the side frame portion 12b. Each end of the planar body 14 folded inward in this state is sewn and fixed in the middle of the planar body 14, thereby holding the planar body 14 between the pair of side frame portions 12b. Can do. Further, the front end of the planar body 14 is sewn and fixed to the front frame portion 12a by the same method. At this time, the front frame portion 12a is exposed from the hole H appropriately provided in the planar body 14, and the exposed front frame portion 12a portion is disposed so as to be able to be locked to the claw portion 4d of the front frame. And the planar body 14 can be hold | maintained in the frame of the holding body 12 by sewing and fixing the rear end of the planar body 14 to each rear frame part 12c.

[First part / Second part]
2 and 3, the planar body 14 is relative to the first portion 21 that is pressed relatively weakly in consideration of the degree of pressing from the seat pad 4 </ b> P in the seated state of the occupant CM. Can be divided into second portions 22r and 22l that are strongly pressed against each other. The first part 21 and the second parts 22r and 22l are continuously formed in the surface direction of the planar body 14 without any interruption, and no gap such as a cut is formed between these two parts. The second parts 22r and 22l are recessed in the direction of being pressed from the seat pad 4P that is recessed and deformed as compared with the first part 21 with the occupant CM seating described below as a reference (second). A method for forming the portions 22r and 22l will be described later).

  Here, the formation positions of the second portions 22r and 22l can be set in the portion 14 of the planar body that is pressed relatively strongly, and the whole or one of the ranges that can face the seat pad 4P portion that is recessed and deformed in the sitting state. Can be set in the department. And the 1st site | part 21 can be set to planar body parts other than the 2nd site | parts 22r and 22l. For example, in the present embodiment, referring to FIG. 2, each of the second portions 22r and 22l is formed in an elliptical shape following the shape of the occupant's buttocks. And each 2nd site | part 22r, 22l is arrange | positioned along with the sheet | seat width direction in the rear part of the planar body 14, and can each be face-to-face arrangement | positioning to the buttock support part HP of the seat pad 4P which supports the passenger | crew ridge part of FIG. FIG. 3 shows only one second part for convenience). One second part 22r is a second part arranged on the right side of the sheet, and the other second part 22l is a second part arranged on the left side of the sheet. And the 1st site | part 21 is formed in planar body 14 parts other than a pair of 2nd site | parts 22r and 22l. That is, in the present embodiment, the first portion 21 is formed in the portion excluding all the front portion of the planar body 14 and the second portions 22r and 22l of the rear portion of the planar body 14.

[Method for forming second part]
The planar body 14 in FIG. 2 is formed of a resin that can be softened by heating. Examples of this type of resin include thermoplastic polyetherester elastomer (TPEE) and polytrimethylene terephthalate (PTT). Then, a fabric or sheet-like or mat-like planar body 14 made of the above-described resinous thread material is formed. Next, the second portions 22r and 22l are formed by partially softening the resin of the planar body 14 by a technique such as hot pressing and then indenting it into a hollow shape. Thus, each 2nd site | part 22r, 22l is shape | molded through heat processing, Therefore The 2nd site | part 22r, 22l of a desired shape can be accurately formed in the desired position of the planar body 14. FIG. The second portions 22r and 22l formed by softening the resin and then formed into a hollow shape can be expanded and contracted in the surface direction in substantially the same manner as the first portion 21.

[Seat cushion formation work (support member assembly work)]
With reference to FIGS. 1 and 2, the support member 10 is disposed on the seat frame 4F so that the seat pad 4P can be supported. In this state, the seat pad 4P is covered with the seat cover 4S while being disposed on the seat frame 4F via the support member 10. In this embodiment, the front frame portion 12a exposed from the hole H of the planar body 14 is locked to the claw portion 4d of the front frame. In this state, the hooking portion 12d of the rear frame portion 12c is hooked to the rear frame 4c while pulling the planar body 14 rearward of the seat. Next, each side frame portion 12b is locked to a locking portion (not shown) of each side frame 4b while pulling the planar body 14 in the seat width direction. After attaching the holding body 12 in the frame of the seat frame 4F while applying an appropriate tension in the surface direction of the planar body 14 in this way, the sheet pad 4P is attached to the back surface of the planar body 14 held by the holding body 12. Support from the side.

[Behavior of support member when seated in passenger]
Referring to FIG. 3, when the occupant CM is seated, the occupant CM is elastically supported while the seat pad 4 </ b> P is recessed and deformed. Although the sheet body 4P of the support member 10 supports the dent-deformed seat pad 4P while being appropriately bent, the seat pad 4P is largely dent-deformed and deformed partially in the buttock support portion HP on the rear side. In this type of seat configuration, it is desirable to fit the planar body 14 to the seat pad 4P when the occupant CM is seated while ensuring the strength of the planar body 14.

  Therefore, in the present embodiment, with reference to FIGS. 2 and 3, the pair of second portions 22r and 22l are formed side by side in the sheet width direction at the rear portion of the planar body 14, and each of the heel support portions of the seat pad 4P is formed. It arrange | positions facing HP. Then, the second parts 22r and 22l are recessed in the direction of being pressed from the seat pad 4P as compared to the first part 21, with the occupant CM seated on the seat pad 4P as a reference. For this reason, it is possible to support the heel part support part HP that has been greatly deformed by supporting the occupant's heel part by the recessed second parts 22r and 22l, and the other seat pad 4P part is appropriately bent first. Can be supported at site 21. As described above, in the present embodiment, the first portion 21 and the second portions 22r and 22l are arranged at appropriate positions, so that the planar body 14 can be fitted to the back surface of the seat pad 4P that has been deformed in a dent. And the intensity | strength of the planar body 14 can be maintained suitably because the 1st site | part 21 and each 2nd site | part 22r, 22l are formed in the planar body 14 continuously without a discontinuity.

  As described above, in the present embodiment, the strength of the planar body 14 can be suitably secured by forming the first portion 21 and the second portions 22r and 22l continuously in the plane direction. In addition, by considering the degree of pressing from the seat pad 4P, the first portion 21 and the second portions 22r and 22l are provided, so that the planar body 14 is suitably fitted to the back surface of the seat pad 4P that has been deformed in a dent. Can do. Further, in the present embodiment, the second portions 22r and 22l having a desired shape can be accurately formed at desired positions on the planar body 14 by forming the second portions 22r and 22l through heat treatment. For this reason, according to the present Example, the planar body 14 can be fitted to the back surface of the seat pad 4P which carried out the dent deformation | transformation, ensuring the intensity | strength of the planar body 14. FIG.

<Example 2>
Since the vehicle seat of the second embodiment has substantially the same configuration as the vehicle seat of the first embodiment, the same reference numerals are assigned to the common structures and the like, and detailed description thereof is omitted. In the present embodiment, referring to FIG. 4, the second portion 22 w is formed by shrinking the planar body 14 </ b> A into a pleat shape in the surface direction, and can be deformed into a hollow shape by receiving a pressure from the seating side. is there. The second portion 22w extends in the seat width direction, and is disposed so as to face the buttocks support portion HP of the seat pad 4P in FIG. 3 while crossing the rear portion of the planar body 14A. Here, the material of the planar body 14A is not particularly limited, but considering the securing of the strength of the planar body 14A, a resin cloth, sheet material, mat material having excellent strength, and a leather surface having excellent strength. Examples thereof include a material and a net body (a face material obtained by weaving resin fibers having excellent strength in a mesh shape).

  And the 2nd site | part 22w can be formed in 14 A of planar bodies in the way of forming a gather. For example, when the second portion 22w is formed by a sewing machine (not shown), the suture lines SEWA and SEWB extending in the front-rear direction of the sheet are formed along both end portions in the width direction of the planar body 14A. At this time, the respective suture lines SEWA and SEWB are formed while being entangled with the lower thread while loosening the upper thread, and then pulled out while pulling the lower thread, so that the planar body 14A is partially sewed into a pleated shape and the second portion 22w. Can be formed. In order to maintain the pleat shape of the second portion 22w, other stitching lines SEWC and SEWD extending in the front-rear direction of the sheet are formed along both widthwise ends of the planar body 14A. In the present embodiment, the second portion 22w is structurally recessed, so that a material having excellent strength can be used by expanding the degree of freedom in selecting the material of the planar body 14A. The structure contributes to strength improvement.

  The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments. For example, in the present embodiment, the configuration (shape, dimension, arrangement, etc.) of the holding body 12 and the planar body 14 is exemplified, but the configuration of these members is not limited. For example, the holding body can be formed by bending and deforming a single bar material into a frame shape. It is also possible to provide a resin around the holding body and hold the end of the planar body on the resin. Note that the method of assembling the holding body with respect to the seat frame can be changed as appropriate.

  Moreover, in this embodiment, although the structure (a shape, a dimension, the number of formation, a formation position, etc.) of the 1st site | part 21 and each 2nd site | part 22r, 22l, 22w was illustrated, it is not the meaning which limits the structure of these each part. For example, in Example 1, a single second part can be provided on the planar body, and three or more second parts can also be provided on the planar body. Also in Example 2, a plurality of second portions can be provided. In Example 2, the second part can be provided continuously or intermittently in the sheet width direction, and can be formed in an appropriate direction such as the front-rear direction of the sheet. In addition to sewing, various methods such as tucker and welding can be used as the method for forming the pleat shape of the second part. Further, the pleat shape of the second part can be partially undulated.

  In the present embodiment, the seat cushion 4 has been described as an example. However, the embodiment can be applied to various seat constituent members such as a seat back. In the case of the seat back, the second portion of the planar body can be formed so as to be able to face the seat pad portion that supports the occupant's waist and shoulders. The configuration of the present embodiment can be applied to all vehicle seats such as vehicles, airplanes, and trains.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest 4F Seat Frame 4P Seat Pad 4S Seat Cover 4b Side Frame 4a Front Frame 4c Rear Frame 4d Claw 10 Support Member 12 Holding Body 12a Front Frame 12b Side Frame 12c Rear Frame Part 12d Hook part 14 Planar body 21 First part 22r, 22l Second part CM Crew H Hole HP Seat pad buttocks support part

Claims (3)

A frame-shaped seat frame forming a seat skeleton, a seat pad that forms a seat outer shape and can elastically support an occupant, and a support member that supports the seat pad,
The support member has a planar sheet-like body capable of supporting the seat pad and a frame-like holder capable of holding the sheet-like body, and the holder is attached in the frame of the seat frame. In the vehicle seat, the planar body held by the holding body is configured to support the seat pad that is recessed and deformed when seated on the occupant from the back side thereof.
With respect to a state in which an occupant is seated on the seat pad, the first portion and the second portion that is strongly pressed from the seat pad that is recessed and deformed compared to the first portion are in the surface direction. The vehicle seat is formed in a continuous manner without any interruption, and the second portion is recessed in a direction pressed from the seat pad as compared to the first portion.   The vehicle seat according to claim 1, wherein the planar body is formed of a resin that is softened by heating, and the second portion is softened by heating and then formed into a hollow shape. 2. The vehicle seat according to claim 1, wherein the second portion is formed by sewing the planar body into a pleated shape, and is capable of being deformed by being depressed into a hollow shape by receiving a pressure from the seating side.

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