JP5841202B2 - Chair - Google Patents

Description

  The present invention relates to a chair in which a tension material that supports a load such as the back of the body or the lower half of the body is stretched on a frame-like frame in a backrest or a seat.

The backrest surface of the backrest of the chair and the seat surface of the seat are in direct contact with the back and lower body of the seated person and support the load.
Therefore, it is possible to improve the breathability and stretch the stretch material by stretching the stretch fabric made of the mesh structure on the frame of the backrest and seat body in the shape of a frame. There is one in which a thread is incorporated into a weft to allow a moderate elastic deformation at the time of sitting so as to obtain a comfortable sitting comfort (for example, see Patent Document 1).

The chair described in Patent Document 1 is a woven or knitted fabric in which a fabric of a tension material stretched on a backrest surface of a backrest or a seat surface of a seat is composed of a combination of a plurality of warps and wefts. In order to form, the entire structure is a uniform texture in any part.
Therefore, when producing the upholstery material, there is an advantage that a large-area fabric can be easily and efficiently produced at a low cost, and an increase in the manufacturing cost of the entire chair can be suppressed.

Japanese Patent No. 4061167

However, when sitting on a chair on which the above-mentioned tension material is stretched, the seated person moves in various directions around the sciatic nodal point of the body, so in the backrest and the seat body, the backrest surface of the backrest Slip frequently occurs between the back and the lower limbs that are in contact with the seating surface of the seat.
Such a slip phenomenon is an element that impairs a stable sitting posture. However, since the occurrence frequency and the slipperiness of the slip are variously different in the body part, the entire fabric has a uniform ground structure. There is a problem that it is difficult to prevent with a upholstery material that uses the material.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a chair capable of preventing slippage due to a tension member at a portion hung between the back and lower limbs of a seated person. It is said.

According to the present invention, the above problem is solved as follows.
(1) A chair in which a tension member is stretched on a frame-like frame in a backrest or a seat, wherein the tension member is a warp or a weft consisting of at least one of a single yarn and a thick twisted yarn. Are formed with an elastic fabric made of a fabric of a ground structure composed in a lattice shape with warps and wefts respectively configured, and the weave strip portion having a width wider than that of the weft And a plurality of strip-shaped step portions extending in the left-right direction so as to protrude from the surface of the tension member. Are arranged spaced apart from each other along the longitudinal direction corresponding to the vertical direction of the backrest or the longitudinal direction of the seat body , and further, the arrangement intervals of the strip-shaped step portions adjacent to each other are set at the upper and lower ends of the backrest. Or the front and back ends of the seat To become gradually smaller as toward the al inwardly.

According to such a configuration, it is possible to stably support the seat occupant while preventing the slippage of the part between the back and the lower limbs of the seat occupant on the tension member, and the belt-like step portion. It can be easily formed in the production process of the upholstery material.

(2) In the above item (1) , by increasing the width of the weft band part by gradually increasing the number of thick wefts forming the weft band part in the arrangement interval between the band-like step parts The height is gradually reduced from the upper and lower ends of the backrest or the front and rear ends of the seat toward the inside.

  According to such a structure, adjustment of the arrangement | positioning space | interval of strip | belt-shaped step parts can be easily performed within the manufacturing process of a tension material.

(3) In the above item (1) or (2) , the vicinity of the portion where the arrangement interval between the belt-like step portions is minimized is set as a support portion for the waist or the buttocks of the seated person.

  According to such a configuration, since the vicinity of the portion where the arrangement interval between the belt-like step portions is the minimum is used as a support portion of the seated person's waist or buttocks, it is hung between the back and lower limbs of the seated person's body. The slippage of the part can be surely prevented.

  ADVANTAGE OF THE INVENTION According to this invention, the chair which enabled it to prevent the slip by the tension material of the site | part hung between a seated person's back and lower limbs can be provided.

It is a front view in the non-use state of one embodiment of the chair of the present invention. It is a side view of a use condition similarly. It is a side view of a back tilt state similarly. It is a front view which shows a part of elastic fabric which comprises a tension material. It is a principal part expansion vertical side view in the VV line of FIG. FIG. 5 is a partially enlarged front view of an eye shape composed of warps and wefts constituting a ground texture of an elastic fabric cloth in a circle A portion of FIG. 4. It is a schematic diagram which expands a part and shows the composition state of the warp and the weft which comprise the ground organization in the square frame B part of FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view of a chair according to an embodiment of the present invention in a non-use state, FIG. 2 is a side view of the use state, and FIG. 3 is a side view of a backward tilt state.

As shown in FIGS. 1 to 3, the chair 1 includes a leg body 4 having five radial leg rods 3 each having a caster 2 at a distal end portion.
In the center of the leg 4, a telescopic leg column 5 having a gas spring (not shown) is erected, and the rear part of the support base 6 is fixed to the upper end of the leg column 5.
In addition, the support base 6, the pedestal 5, and the leg 4 may be integrated.

  The support base 6 has a shallow dish shape having a triangular shape in a plan view that expands toward the front, and inclines toward the front upper side in a side view.

The seat body 7 comprises a seat plate 8 made of synthetic resin and a cushion material 9 attached to the upper surface of the seat body 7. Both side portions of the front end of the seat plate 8 are pivotal shafts 10 facing left and right sides of the front end of the support base 6. The seat body 7 is pivotable about the pivot shaft 10 from the standby state shown in FIG. 1 that is inclined backward and upward to the use position that is horizontally or downwardly inclined as shown in FIG.
Thereby, a seated person's load is added back rather than the pillar 5, and the seated person's buttocks can be stably supported by the rear part of the seat body 7.

On both sides of the rear end of the seat plate 8, both sides of the lower end of the backrest 12 are pivotally attached with shafts 11 facing in the left-right direction.
The backrest 12 is rotatable about the shaft 11 from an upright position shown in FIG. 2 to a substantially upward position and a backward inclined position shown in FIG. 3 from the upright position.

  As shown in FIG. 1, the backrest 12 is a frame composed of a backrest frame 13 having an inverted U shape when viewed from the front, and an intermediate frame 14 that is placed horizontally below an intermediate portion in the vertical direction of the backrest frame 13. A mesh-shaped tension member 16 is stretched on a frame-shaped frame 15.

  4 is a front view showing a part of the elastic fabric constituting the tension material, FIG. 5 is an enlarged vertical side view of a main part taken along line V-V in FIG. 4, and FIG. 6 is an elasticity in a circle A part in FIG. FIG. 7 is a partially enlarged front view showing a mesh composed of warps and wefts constituting the texture of the fabric, and FIG. 7 shows warps and wefts constituting the texture in the corner frame B part of FIG. It is a schematic diagram which partially enlarges and shows a composition state with a strip.

  As shown in FIG. 4, the upholstery material 16 is composed of a ground structure in which an elastic fabric 17 is composed of a warp 18 and a weft 19 in a lattice shape.

The warps 18 and the wefts 19 are formed in a lattice shape with substantially the same width, thereby forming a uniform texture of the eyes.
As shown in FIG. 6, when the warps 18 and the wefts 19 are formed in a lattice pattern, the texture is, for example, a distance of 2 mm between the warp 18 having a width of 2 mm and the wefts 19 having a width of 2 mm. When the composition is formed in a lattice pattern with a gap, a square eye opening of 2 mm in longitude and latitude is formed at the center of the lattice in the uniform ground structure 17a.

As shown in FIGS. 1 and 4, the weft 19 extending in the left-right direction has a weft strip 20 wider than the weft 19 in the warp direction, that is, in the vertical direction of the backrest 12. The backrest 12 is formed so as to extend in the left-right direction.
The weft strip portion 20 is configured more densely than the ground structure 17a.

  A plurality of the weft strip portions 20 are arranged apart from each other in the warp direction of the fabric, and the arrangement intervals d1, d2,... Dn between the weft strip portions 20 adjacent to each other in the warp direction are backrested. An arrangement interval dn that gradually decreases from the upper end of 12 or lower toward the position corresponding to the waist of the seated person at the center of the rear from the front end of the seat body 7 and gradually increases from the minimum dn portion. , Dn + 1..., In other words, has a form in which the arrangement interval between the weft strips 20 decreases from the upper and lower ends of the backrest 12 inward, and these weft strips 20 As shown in FIG. 5, an array pattern (hereinafter referred to as a horizontal pattern) formed by a plurality of weft strips 20 on the surface of the ground structure 17a is projected on the surface of the ground structure 17a. (Referred to as a pattern).

The horizontal pattern can be repeatedly formed at least once in the warp direction of the fabric according to the size of the backrest 16 of the chair to be applied.
The arrangement of the plurality of weft strip portions 20 can stably support the back of the seated person.

In the case of forming the weft band portion 20, in the composition of the weft 19 in the ground structure 17a to be described later, the combination of the fine warp 21 and the thick weft 23, the thick weft 23 of the ground structure 17a is used. It is carried out by composing into a knot weave structure that can protrude like a wrinkle from the surface.
As a result, the weft strip portion 20 can be protruded with a step on the surface of the ground texture 17a as a strip-shaped step portion.

That is, in order to compose the fabric texture 17a, as shown in FIG. 7, the warp 18 is composed of a plurality of single yarns 21, for example, four fine warp yarns 21a to 21d and a plurality of thick twisted yarns. 22, for example, four thick warps 22a to 22d, and two fine warps 21a to 21d are arranged on both sides of each of these thick warps 22a to 22d.
On the other hand, the weft 19 is composed of a plurality of thick twisted yarns 23, for example, three thick wefts 23a to 23c.
In addition, a plurality of single yarns 24, for example, three transparent fine weft yarns 24a to 24c are used as reinforcing yarns in the lattice gap that becomes the eye holes between the wefts 19 adjacent to each other in the warp direction. It is arranged.

Next, the composition state of the ground tissue 17a in the fabric will be described.
For the fine warp yarns 21a arranged outside one of the four fine warp yarns 21a to 21d constituting the warp 18, the three fine weft yarns 24a to 24c are three thick weft yarns. It is organized in a plain weave state over 3 through 23a-23c.
For the fine warp yarns 21d arranged on the other outer side, three fine weft yarns 24a to 24c and three thick weft yarns 23a to 23c are organized in a plain weave state.

For the four thick warps 22a to 22d constituting the warp 18, the three fine wefts 24a to 24c and the three thick wefts 23a to 23c are alternately organized in a plain weave state. The two outer thick warps 22a and 22d in the four thick warps 22a to 22d are respectively compared to the inner two thin warps 21b and 21d in the four thin warps 21a to 21d. Organized in a woven state.
As a result, the fabric texture 17a is composed in a lattice pattern with the warps 18 and the wefts 19, and the warp 18 after the composition is displaced in the weft direction, or the wefts 19 are displaced in the warp direction. It is structured so that the lattice form can be securely held.

In order to form the wefts 19 constituting the fabric texture 17a of the upholstery material 16 on the weft bands 20 that can partially protrude from the surface of the texture 17a, for example, in the wefts 19 shown in FIG. Two thick wefts 23 are overlapped on both sides in the warp direction, and these thick wefts 23 are supplemented with fine wefts 24 as reinforcing yarns as needed during the weft 19 weaving process. However, it is performed by composing with a thick weave 23 together with a thick weft 23 constituting the weft 19.
Further, the arrangement intervals d1, d2,... Dn between the weft strips 20 adjacent to each other in the longitudinal direction from the upper end of the backrest 12 toward the position corresponding to the waist of the seated person in the substantially central part below. In order to gradually reduce the widths s1, s2,..., Sn of the weft bands 20, the number of the thick wefts 23 is partially increased, and at the same time, the warp threads between the weft bands 20 This is done by gradually decreasing the number.
Further, the arrangement intervals dn, dn + 1... Between the weft strips 20 are gradually increased from the portion where the arrangement interval between the weft strips 20 is the smallest dn and the width of the weft strip 20 is the widest sn. In this case, the number of thick wefts 23 is partially reduced, and at the same time, the number of meshes in the warp direction of the ground structure 17a between the weft strips 20 is gradually increased.
In this case, as in the upper part of the backrest 12, for example, in the regions where the spacing intervals d1, d2 between the weft strips 20 are wide and the widths s1, s2 of the weft strips 20 are narrow and substantially equal, By reducing only the number of meshes in the longitudinal direction of the ground texture 17a between the weft belt portions 20 adjacent to each other, it is also possible to partially reduce the arrangement interval between the weft belt portions 20 partially.

In the above-described embodiment, the tension material stretched on the backrest of the chair has been described as an example. However, the present invention is also applicable to a large-sized panel such as a tension material stretched on a seat body or a large panel. It is also possible to do.
In the case of a sitting body, the arrangement intervals d1, d2,... Dn between the weft strips 20 forming the horizontal pattern are set to the seated person's buttocks at the substantially central part on the rear side from the front end of the sitting body. It arranges so that it may become small gradually as it goes to a corresponding part, and it arranges so that arrangement space dn, dn + 1, ... after that may become large gradually, in other words, from the front-and-rear end of a seat to the buttocks in the central part By arranging so that the arrangement interval between the weft strip portions 20 decreases toward the corresponding inward direction, the seated person's buttocks can be stably supported.

DESCRIPTION OF SYMBOLS 1 Chair 2 Caster 3 Leg rod 4 Leg 5 Leg column 6 Support base 7 Seat body 8 Seat plate 9 Cushion material 10 Axis 11 Axis 12 Backrest 13 Backrest frame 14 Intermediate frame 15 Frame-shaped frame 16 Tension material 17 Elastic fabric 17a Ground organization 18 Longitudinal line 19 Weft line 20 Weft belt section (band-shaped step)
21 Single yarns 21a to 21d Fine warp yarns 22 Thick warp yarns 22a to 22d Thick warp yarns 23 Thick twist yarns 23a to 23c Thick weft yarns 24 Single yarns 24a to 24c Fine weft yarns

Claims (3)

A chair formed by stretching a tension material on a frame-like frame on the backrest or seat,
Elasticity composed of a fabric of a ground structure composed of a warp and a weft composed of a plurality of warps or wefts each composed of at least one of a single yarn or a thick twisted yarn, and composed of a warp and a weft in a lattice shape. It is formed with a fabric, and a composition in which the weft strip portion wider than the weft strips can be projected on the surface of the upholstery material, and the weft strip portions project on the surface of the upholstery material. Forming a plurality of strip-shaped stepped portions extending in the left-right direction, and arranging the plurality of strip-shaped stepped portions apart from each other along a longitudinal direction corresponding to the vertical direction of the backrest or the longitudinal direction of the seat body. Further, the chair is characterized in that the arrangement interval between the adjacent band-shaped stepped portions gradually decreases from the upper and lower ends of the backrest or the front and rear end sides of the seat body toward the inward direction . By increasing the number of thick wefts forming the weft strips and increasing the width of the weft strips, the upper and lower ends of the backrest or the seat claim 1 Symbol mounting chairs were to become gradually smaller as toward the front and rear ends inward. The chair according to claim 1 or 2 , wherein the vicinity of a portion where the arrangement interval between the belt-like step portions is the minimum is used as a support portion for a waist portion or a buttocks portion of a seated person.

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