JP2003116663A - Seat back for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a correct sitting posture and to improve a sitting feeling by preventing the back of a seated person from getting into a seat frame and reliably supporting the lumbar vertebra of the seated person. SOLUTION: A support body 21 is attached between the lower parts of a pair of left and right side frames 13b in the seat frame consisting of a pipe frame. The support body 21 is also attached to the rear surface of the upholstery material which is fitted to the seat frame. The steric woven object of the upholstery material 15 is formed by a front base cloth 16 and a rear base cloth 17 constituted of front and rear woven objects and elastic middle layer 18 which is integrally woven with the base clothes 16 and 17. A fixing wire 19 is fixed along the pair of right and left side frames 13b. The support body 21 is formed of the belt shape upholstery material and a plurality of hooks 23 and lock holes 29 are formed at both ends of the support body 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat back of a vehicle seat, and more specifically, for a vehicle provided with a seat frame and a skin material formed from a three-dimensional structure woven or knitted fabric attached to the seat frame. Regarding the seat back of the seat.

[0002]

2. Description of the Related Art Usually, a vehicle seat or the like includes a seat frame, a pad material attached to the seat frame,
It is formed of a skin material covering the seat frame and the pad material. Recently, in order to improve the air permeability of the vehicle seat and reduce the weight, a net formed in a mesh shape on the seat frame is attached to the seat frame in a state of being pulled by a predetermined tension (Patent Document 1) 200
No. 0-79840) has been proposed.

Further, Japanese Patent Laid-Open No. 6-57579 discloses that
A multi-layered woven or knitted fabric is disclosed, which is made of a bulky woven or knitted fabric having a thickness of 5 mm or more, which is made of a double-sided woven fabric and the like, and front and back double-sided base fabric and connecting yarns connecting the front and back double-sided base fabric. As shown in FIG. 8, a vehicle seat back 1
Is formed by attaching a skin material 5 made of a three-dimensional structure woven or knitted bulky woven knitted fabric to a seat frame 3 which is formed by bending a pipe frame or the like into a substantially square frame shape, and a pad material made of urethane or the like is omitted. .

[0004]

In a conventional seat back 1 for a vehicle seat, when the skin material 5 made of a bulky three-dimensional structure woven or knitted fabric is attached to the seat frame 3 having a substantially rectangular frame shape, the seat back 1 is used. Although it can be made thin, the skin material 5 made of a bulky three-dimensional woven or knitted fabric has elasticity, and the seated person H
Since the portion corresponding to the back extends in a substantially arc shape due to the weight of the seat, the back of the seated person H dives into the seat frame 3, and the lumbar vertebra H1 of the seated person H is insufficiently supported, so that a correct sitting posture cannot be taken. There is a risk of fatigue, cramping or discomfort due to sitting posture for a long time.

An object of the present invention is to make it possible to stretch a skin material made of a bulky three-dimensional structure woven or knitted fabric according to the curve of the seat frame, to provide an excellent appearance, to reduce the weight by not requiring a pad material. The seat can be made thinner, the seated person's back can be prevented from diving into the seat frame, the lumbar vertebra of the seated person can be reliably supported, and a proper sitting posture can be obtained, resulting in long-term sitting. An economical seat back for a vehicle seat that can improve cushioning and tactile sensation without giving rise to fatigue or cramping or discomfort due to posture and improving sitting comfort To do.

[0006]

The present invention has been made in view of the above-mentioned problems, and a seat back of a vehicle seat according to claim 1 of the present invention is attached to a seat frame and the seat frame. In a seat back of a vehicle seat including a skin material formed from a three-dimensional structure woven or knitted fabric, the seat frame is formed of a pipe frame, and the back surface side of the skin material attached to the seat frame including the pipe frame, A support is attached between the lower parts of the pair of left and right side frames of the pipe frame, and the three-dimensional woven or knitted fabric of the skin material has a front surface backing and a back surface backing composed of front and back woven and knitted fabrics, and And an elastic intermediate layer which is woven and knitted integrally with the cloth.

According to a second aspect of the present invention, in the seat back of a vehicle seat, fixing wires are fixed along a pair of left and right side frames of the pipe frame, and a plurality of hooks are provided at both ends of the support body. Are fixed, the support is formed of a strip-shaped skin material, and a plurality of hooks at both ends of the support are locked to the fixing wire.

According to a third aspect of the present invention, in a vehicle seat back, side panels are fixed to a pair of left and right side frames of the pipe frame, and a plurality of locking portions are formed along the side panels. The support is formed of a strip-shaped skin material, a plurality of hooks are fixed to both ends of the support, and the plurality of hooks of both ends of the support are locked to the plurality of locking portions. It is characterized by

According to a fourth aspect of the present invention, in a vehicle seat back, side panels are fixed to a pair of left and right side frames of the pipe frame, and a plurality of locking portions are formed along the side panels. The support is formed of a strip-shaped skin material, a plurality of locking holes are formed at both ends of the support, and the plurality of locking holes at both ends of the support are engaged with the plurality of locking portions. It is characterized by being stopped.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a seat back of a vehicle seat according to the present invention will be described in detail with reference to the drawings. 1 to 5 respectively show a seat back of a vehicle seat according to the present invention, FIG. 1 is a perspective view of the seat back of the vehicle seat, FIG. 2 is a sectional view taken along line XX of FIG. Is a perspective view of the seat frame of the seat back, FIG. 4 is a perspective view of the seat frame of the seat back with a support attached, and FIG. 5 is a cross-sectional view of the seat back of the vehicle seat.

As shown in FIGS. 1 to 5, a seat back 11 for a vehicle seat includes a seat frame 13 formed by bending a pipe frame or the like into a substantially square frame shape, and a skin material made of a three-dimensional woven or knitted bulky woven or knitted fabric. 15 is attached and formed,
The pad material made of urethane or the like is omitted. The seat frame 13 is formed in a substantially rectangular frame shape from an upper frame 13a, a pair of left and right side frames 13b and 13b, and a lower frame 13c.

The seat frame 13 can be formed of an aluminum alloy, a magnesium alloy, or the like, in addition to a normal steel material. The seat frame 13 is formed to have a circular cross section, but may have a quadrangular cross section or other polygons. A side panel 14 is provided below the pair of left and right side frames 13b and 13b.

A fixing wire 19 is provided along the seat frame 13 having a substantially rectangular frame shape as a trim wire for locking the end of a support body 21 described later. The end of the support body 21 can be directly locked to the locking portion formed on the seat frame 13. The fixing wire 19 is formed to extend in the vertical direction along the lower portion of the side panel 14 or the pair of left and right side frames 13b, 13b.

As shown in FIG. 2, the seat back 11 has a skin material 15 stretched over the seat frame 13. The skin material 15 has a front surface backing 16 and a back surface backing 17 composed of front and back woven and knitted fabrics, and an elastic intermediate layer 18 woven and knitted integrally with the front and back bases 16 and 17. It is formed from a three-dimensional woven or knitted fabric.

The skin material 15 composed of the three-dimensional woven or knitted fabric can be formed of synthetic resin fibers such as nylon, PP, PE, etc., and elasticity and tensile strength can be variously obtained depending on the thickness of the filament of the yarn. The skin material 15 can be formed to a thickness of 5 mm or more. In this embodiment, the one having a thickness of 10 mm is used. The skin material 15 made of this three-dimensional structure woven or knitted product can be manufactured by a double Russell knitting machine or the like.

Before the skin material 15 made of the three-dimensional structure woven or knitted fabric is stretched on the seat frame 13, as shown in FIG.
An elastic band-shaped support body 21 made of a skin material or the like is attached to the wire 19 for fixing between the lower portions of the pair of left and right side frames 13b, 13b of the seat frame 13 made of a pipe frame. As shown in FIG. 5, the support 21 is arranged at a position corresponding to the lumbar portion H1 of the seated person H on the back side of the skin material 15.

A pair of upper and lower hooks 23 are fixed to both ends of the belt-like support 21, and a pair of upper and lower hooks 23 at both ends of the support 21 are locked to the fixing wire 19. The support body 21 may be formed of the same three-dimensional structure woven or knitted fabric as the skin material 15, or may be formed of a different three-dimensional structured woven or knitted fabric, or other skin material having various elasticity or stretchability. The hook 23
The number is not limited to a pair of upper and lower, and a plurality of them can be stably supported.

Further, the support 21 can be adjusted in support feeling in accordance with the tension of the skin material 15 depending on the initial tension and the material at the time of installation. In the present embodiment, the support body 21 is formed of a single piece, but the support body 21 can be formed by stacking a plurality of strip-shaped bodies, and the plurality of strip-shaped bodies can be arranged separately. The support 21 can also be formed.

After the support 21 is attached, the end of the skin material 15 is locked to the seat frame 13 side for end treatment. As shown in FIG. 5, the support 21 and the skin material 15
The lumbar vertebra H1 of the seated person H is reliably supported by the lower part of the.

FIG. 6 shows an embodiment in which the support member 21 of the seat back according to the present invention is mounted in different states. In this embodiment, a plurality of hooks 23 at both ends of the support member 21 have side walls. It has the same configuration as that of the above-described embodiment except that it is engaged with a plurality of engaging portions 25 formed along the panel 14. The plurality of locking portions 25 are formed by cutting and raising.
It suffices that at least one pair of upper and lower locking portions 25 are formed.

7 (a) and 7 (b) show an embodiment in which the support 21 of the seat back according to the present invention is mounted in a different manner. In this embodiment, the side panel 14 is arranged along the side panel 14. The plurality of locking portions 27 formed as described above are formed in a substantially L-shaped cross section, and the plurality of locking holes 29 are formed at both ends of the support body 21.

The engaging holes 29 at both ends of the support 21 are engaged with the engaging portions 27 having a substantially L-shaped cross section, and the engaging portions 27 are caulked. In addition, the support 21
Reinforcing wires 31 are vertically attached to both ends of the. The wire 31 is inserted into both ends of the support 21 and attached, or attached by sewing or the like. still,
The locking portion 27 and the locking hole 29 are not limited to a pair of upper and lower, but a plurality of them can be stably supported.

[0023]

The above is the embodiment of the seat back of the vehicle seat according to the present invention. According to the seat back of the vehicle seat according to claim 1 of the present invention, the seat frame is formed from the pipe frame. A three-dimensional structure woven or knitted fabric of the skin material, which is formed on the back side of the skin material attached to the seat frame including the pipe frame, has a support body attached between the lower portions of the pair of left and right side frames of the pipe frame. Since the front and back base fabrics are composed of the front and back woven and knitted fabrics, and the elastic intermediate layer that is woven and knitted integrally with the front and back base fabrics, the back of the seated person is seated against the seat frame. It is possible to prevent the occupants from slipping into the seat and to securely support the lumbar vertebra of the seated person, to obtain a correct sitting posture, and to feel tired, cramped or uncomfortable due to the sitting posture for a long time. No portions that can improve cushioning and feel properties.

According to the seat back of the vehicle seat of the second aspect of the present invention, the fixing wires are fixed along the pair of left and right side frames of the pipe frame, and the supporting body is in the form of a strip. Formed from a skin material, a plurality of hooks are fixed to both ends of the support, and a plurality of hooks at both ends of the support are respectively locked to the fixing wires, which facilitates assembly work. This can be performed quickly and the lumbar vertebra of the seated person can be reliably supported.

According to the seat back of the vehicle seat of the third aspect of the present invention, the side panels are fixed to the pair of left and right side frames of the pipe frame, and a plurality of locking members are provided along the side panels. And a plurality of hooks are fixed to both ends of the support, and the plurality of hooks at both ends of the support are engaged with the plurality of locking portions. Since it is stopped, the assembling work can be performed easily and quickly, and the lumbar vertebra of the seated person can be reliably supported.

Further, according to the seat back of the vehicle seat of the fourth aspect of the present invention, the side panels are fixed to the pair of left and right side frames of the pipe frame, and a plurality of locking members are provided along the side panels. Part is formed, the support is formed of a strip-shaped skin material, a plurality of locking holes are formed at both ends of the support, and a plurality of locking holes at both ends of the support are provided in the plurality of engaging holes. Since they are locked in the stoppers respectively,
The assembling work can be performed simply and quickly, and the lumbar vertebra of the seated person can be reliably supported.

According to the seat back of the vehicle seat of the present invention, the skin material made of the bulky three-dimensional woven or knitted fabric can be stretched in accordance with the curve of the seat frame, has an excellent appearance and does not require a pad material. The weight can be reduced, the seat can be made thinner, the back of the occupant can be prevented from slipping into the seat frame, and the lumbar vertebra of the occupant can be reliably supported to obtain a correct sitting posture. It is possible to improve the cushioning property and the tactile feeling without being tired, cramped or uncomfortable by sitting for a long time, and improving the sitting comfort. It is possible to obtain the seat back of the seat for use.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat back of a vehicle seat according to the present invention.

FIG. 2 is a cross-sectional view of the seat back of the vehicle seat according to the present invention taken along line XX in FIG.

FIG. 3 is a perspective view of a seat frame of a seat back of a vehicle seat according to the present invention.

FIG. 4 is a perspective view showing a state in which a support is attached to a seat frame of a seat back of a vehicle seat according to the present invention.

FIG. 5 is a cross-sectional view showing a state in which a support is attached to a seat frame of a seat back of a vehicle seat according to the present invention.

FIG. 6 is a perspective view of another embodiment of a seat frame of a seat back of a vehicle seat according to the present invention.

7A and 7B show still another embodiment of the seat frame and the support of the seat back of the vehicle seat according to the present invention, wherein FIG. 7A is a perspective view before mounting the support, and FIG. FIG.

FIG. 8 is a side sectional view of a seat back of a conventional vehicle seat.

[Explanation of symbols]

11 seat back 13 seat frame 13a upper frame 13b side frame 13c lower frame 14 Side panel 15 Skin material 16 surface fabric 17 Back fabric 18 Middle class 19 Wire for fixing 21 Support 23 hook 25 Locking part 27 Locking part 29 Locking hole

Claims (4)

[Claims] 1. A seat back for a vehicle seat, comprising: a seat frame; and a skin material formed of a three-dimensional structure woven or knitted fabric attached to the seat frame, wherein the seat frame is formed of a pipe frame. On the back side of the skin material attached to the seat frame, a support is attached between the lower portions of the pair of left and right side frames of the pipe frame, and the three-dimensional woven or knitted fabric of the skin material is a surface made of woven and knitted fabrics A seat back for a vehicle seat, comprising a base fabric and a back face fabric, and an elastic intermediate layer that is woven and knitted integrally with the front and back fabrics. 2. A fixing wire is fixed along a pair of left and right side frames of the pipe frame, the support is formed of a strip-shaped skin material, and a plurality of hooks are fixed to both ends of the support. The seat back for a vehicle seat according to claim 1, wherein a plurality of hooks at both ends of the support body are locked to the fixing wire. 3. A side panel is fixed to a pair of left and right side frames of the pipe frame, a plurality of locking portions are formed along the side panel, and the support body is formed of a strip-shaped skin material. The plurality of hooks are fixed to both ends of the body, and the plurality of hooks of both ends of the support body are locked to the plurality of locking portions.
The seat back of the vehicle seat described in. 4. A side panel is fixed to a pair of left and right side frames of the pipe frame, a plurality of locking portions are formed along the side panel, and the support body is formed of a strip-shaped skin material. A plurality of locking holes are formed at both ends of the body, and a plurality of locking holes at both ends of the support are locked to the plurality of locking portions.
The seat back of the vehicle seat described in.