JP2004033542A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a phenomenon in which thighs of a seated person are pushed up by a front end of a frame on a seat with a structure of netted frame. <P>SOLUTION: A net 5 is composed of a weft yarn group 7 and a warp yarn group 8. A front part 5a is structured as a highly elastic part by increasing a density of the weft yarn group 7 in the front part 5a of the net 5. The whole of the front part 5a is maintained in its laterally right stretched state, so that the thighs of the seated person can be evenly supported with a large area of the front part 5a. As a result, the thighs of the seated person can be prevented from hitting against a front part 3b of a frame 3 and a push-up feeling can be eliminated. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a chair.
[0002]
[Prior art]
As one form of a chair, there is a chair in which a seat body and a backrest have a structure in which a net is stretched on an annular frame such as a substantially square shape. This type of chair is generally called a net chair (or a net chair), and has an advantage of being excellent in air permeability and cushioning.
[0003]
The net used in this net chair is generally a woven fabric in which a warp group and a weft group are entangled, and the elastic deformation of the net is allowed by using elastic yarn (high elastic yarn) for at least one of the yarn groups. Thus, the cushioning property and the fitting property are ensured.
[0004]
By the way, in the net chair, the front end of the frame hits the thigh of the seated person via the net, that is, the thigh is pushed up at the front end of the frame, and the user feels uncomfortable or uncomfortable. There was pleasure. Conventionally, a cushion material such as urethane rubber is interposed between the front end of the frame and the net to prevent the thigh from being pushed up by the front end of the frame.
[0005]
[Problems to be solved by the invention]
However, when the urethane rubber is interposed as in the related art, the number of components increases accordingly, so that the labor for managing the components and the labor for assembling increase.
[0006]
An object of the present invention is to improve such a situation.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is a chair in which a seat has a structure in which elastically deformable nets are stretched on a frame having at least left and right sides and a front end, A portion or a plurality of portions of the nets along the front-rear direction is formed as a high elasticity portion having a relatively high elastic force as compared with other portions and extending over the entire left and right width of the nets.
[0008]
In a preferred embodiment of the present invention, at least a front portion of the nets is a high elasticity portion.
[0009]
According to a third aspect of the present invention, in the second aspect, the nets are made of a woven or knitted fabric in which a weft group extending in the left-right direction and a warp group extending in the front-rear direction (or up-down direction) are tangled in a front view. , Using a high elasticity yarn as the warp yarn group, and increasing the density of the weft yarn group, increasing the cross-sectional area of the yarn, or using a material with high strength, over the entire left and right width of the nets The extended high elasticity part is formed.
[0010]
Since the magnitude of the elastic force of the nets is relative, providing a high elasticity portion on the net is equivalent to providing a low elasticity portion on the nets when viewed in reverse. Therefore, according to the present invention, the elastic force of the nets is not uniform when viewed in the front-back direction (vertical direction in the case of the backrest), and a relatively high elastic force portion and a relatively low elastic force portion are not included. It can be said that it is formed so as to be adjacent to the front and back and to extend over the entire left and right width.
[0011]
The specific value of the elastic force may be set in accordance with various requirements such as the use of the chair and the intended use (for example, the absolute value of the elastic force differs between an adult chair and a child chair). ).
[0012]
The present invention can also be applied to a chair in which a seating frame and a backing frame are integrally formed by integrally configuring a seating frame and a backing frame.
[0013]
In addition, nets are a general term for thin materials that are adapted to receive the human body by fixing their peripheral parts to the frame, and are not limited to woven or knitted fabrics, It also includes a warp group that is overlapped and welded or bonded at the intersection, and a tough film (including both porous and non-porous). There is no limitation on the thickness or structure of the nets, and a net structure may be employed.
[0014]
[Action and Effect of the Invention]
ADVANTAGE OF THE INVENTION According to this invention, the trouble that a specific part of a seat or a backrest strongly hits a body and gives a feeling of oppression or discomfort to a person, or a specific part of nets sinks too much can be prevented or significantly suppressed.
[0015]
For example, when the front portion of the net is made of a high elasticity portion as in claim 2, the front end portion of the net is maintained in a tightly stretched state, so that the thighs of the seated person can be evenly supported over a wide area. The phenomenon that the thighs intensively hit the front end of the frame does not occur. That is, it is possible to prevent the thigh from being pushed up by the front end of the frame.
[0016]
In this case, since a separate member such as a cushion material is not required, the trouble of parts management and the trouble of assembling do not increase. Therefore, according to the present invention, it is possible to provide the user with a comfortable sitting comfort without increasing the trouble of parts management and the trouble of assembling.
[0017]
According to the third aspect of the present invention, since the woven or knitted fabric can be used as the net as it is, the work of attaching the net to the frame can be performed more easily, and a high elastic yarn is used for the weft group. Therefore, there is an advantage that not only can the cushioning property be reliably maintained, but also the high elasticity portion extending over the entire left and right width can be easily formed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0019]
(1). First Embodiment (FIGS. 1 to 4)
1 to 7 show a first embodiment. 1 is a perspective view of a chair provided with a seat 1 and a backrest 2, FIG. 2 is a partially cutaway plan view of the seat 1, FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 2, and FIG. It is a top view.
[0020]
Both the seat 1 and the backrest 2 have a structure in which nets 5, 6 are stretched on annular frames 3, 4, respectively. The seat frame 3 is formed in a substantially rectangular shape in plan view with a left and right side portion 3c extending in the front-rear direction and a front portion 3b and a rear portion 3c extending in the left and right direction.
[0021]
As a means for fixing the nets 5 and 6 to the frames 3 and 4, various methods such as bonding with an adhesive, fixing with a pressing member, and integral molding can be adopted.
[0022]
Both nets 5 and 6 use a woven or knitted fabric in which a weft group 7 extending in the left-right direction when viewed from the front of the chair and a warp group 8 extending in the front-rear direction or the vertical direction when viewed from the front of the chair. In this embodiment, a high elasticity yarn such as an elastomeric monofilament is used for the weft group 7 and an inelastic yarn is used for the warp group 8.
[0023]
Of course, both yarn groups 7 and 8 may use a high elasticity yarn, or a high elasticity yarn may be used for the weft yarn group 7 and an ultra-high elasticity yarn having higher elasticity may be used for the warp yarn group 8. It is also possible.
[0024]
The density of the warp yarn group 8 is uniform throughout the seat net 5, but the density of the weft yarn group 8 (or the number of braided yarns) of the weft yarn group 8 in the front portion 5a is increased to increase the density of the seat net 5. The front part 5a of 5 is a high elastic part having an elastic force higher than other parts.
[0025]
The front portion 5a of the seating net 5 is a highly elastic portion over the entire left and right width. FIG. 4 shows a plain state as an example of the simplest example, and shows a state in which the weaving density is different at the front part.
[0026]
In the above configuration, since the front portion 5a of the seating net 5 is a highly elastic portion, when a human thigh hits the front portion 5a, the thigh is evenly spread over a wide area of the front portion 5a. Can be supported. For this reason, the front part 3b of the seat frame 3 does not strongly hit the thigh of the person, and as a result, a feeling of oppression or pushing up is prevented, and the user can obtain a comfortable sitting comfort. it can.
[0027]
The elastic force of the sitting net 5 may be gradually changed by gradually changing the density of the weft group 7 at the rear of the high elasticity portion.
[0028]
(2). Second embodiment (FIG. 5)
FIG. 5 shows a second embodiment. That is, in this embodiment, the seating net 5 is divided into four zones of the front part 5a, the first intermediate part 5b, the second intermediate part 5c, and the rear part 5d, and the front part 5a and the second intermediate part 5c are The high elasticity portion has a higher elasticity than the first intermediate portion 5b and the rear portion 5d.
[0029]
In this example, the buttocks of the seated person mainly hit the second intermediate portion 5c, and therefore, there is an advantage that the second intermediate portion 5c can be prevented from sinking too much.
[0030]
The elastic force may be gradually changed by gradually changing the density of the weft group 7 at the boundary between the portions 5a to 5d. In addition, the elastic force of each of the four portions 5a to 5d is set to 3 from the front portion 5a, such as “large → small → extra large → middle” or “large → middle → large → small”. It is also possible to have more than a step.
[0031]
It is also possible to make the elasticity of other parts uniform, with only the part where the buttocks of the person hits as the high elasticity part.
[0032]
(3). Third embodiment (FIG. 6)
FIG. 6 is a front view of a third embodiment which is another example of the seat frame 3, and in this embodiment, the seat frame 3 has a front end 3b lower than a rear end 3c, and The front portions of the left and right side portions 3a are gently curved downward.
[0033]
(3). Example of cutting out net from raw material Also in the case of the backrest 2, the upper part 4a and the lower part 4b of the back frame 4 may strongly hit the back and the waist of the person. When the upper part 4a of the back frame 4 hits the back, as shown in FIG. 7, the upper part 6a of the back net 6 may be formed as a high elasticity part having a high density of the weft group.
[0034]
On the other hand, a net material is generally formed by winding a long web into a roll shape, and is often cut into a predetermined size for use. An example of a method of cutting out the sitting net 5 and the back net 6 from the web 9 when the elastic force is made different for both the back net 5 and the back net 6 is shown.
[0035]
That is, in this embodiment, the weft group 7 in the chair is a warp 10 that is not skipped by the shuttle in the usual sense of the weaving method, and the warp group 8 in the chair is reciprocated by the shuttle in the usual sense of the weaving method. The width of the raw fabric 9 is set to a width that allows the seat net 5 and the back net 6 to be simultaneously taken.
[0036]
In this manner, the warp 10 and the weft 11 in the usual sense are vertically and horizontally reversed in the chair, so that the raw fabric 9 is efficiently woven so as to have the same structure over the entire length, and the seat and back nets 5 are woven. , 6 can be cut out efficiently.
[0037]
Of course, the fabric of the material may be woven such that the weft in the usual sense extends in the left and right directions at the seat and the backrest.
[0038]
(4). Second embodiment (FIGS. 9 to 11)
9 to 11 show other examples of the structure of the net. 9 is a three-dimensional view, FIG. 10 is a two-dimensional view, and FIG. 11 is an explanatory diagram of the operation.
[0039]
In the present embodiment, a long warp yarn 10 uses spandex twisted around a multifilament including urethane yarn, and a weft yarn 11 uses a high elasticity yarn such as a monofilament made of an elastomer.
[0040]
In this embodiment, when the warp yarns 10 and the weft yarns 11 are entangled, two warp yarns 10 are alternately embraced by two weft yarns 11. In this case, a pair of weft yarns is used. The holding state of the pair of warps 11 by the pair 11 is sequentially shifted.
[0041]
That is to say, referring to the reference numerals in FIG. 10, in the pair of wefts 10 a, the first and second warp 10, the third and fourth warp 10, the fifth and sixth warp 10, and so on. An odd numbered head embraces two warp yarns 11, and among the pair of weft yarns 11 located next to each other, even numbered warp yarns 2, 3, 4, 5. Thus, the embracing state of the two warp yarns 10 by the two weft yarns 11 is alternately shifted such that two warp yarns 16 with the head are embraced.
[0042]
The two wefts 11 are wrapped by the two wefts 11 so that the two warps 10 are brought closer to each other. However, since the wrapping states of the pairs of the wefts 11 are sequentially shifted, they are schematically shown in FIG. As described above, each warp 10 has a meandering state in the longitudinal direction, and therefore, the actual length of the warp 10 is longer than the length L of the woven fabric.
[0043]
That is, in the woven fabric, the warp 10 meanders also in the thickness direction, but in the present embodiment, the warp 10 meanders even in a plan view, so that the warp 10 can be greatly extended. In No. 6, the allowable range of elongation is increased as a whole, and the cushioning property can be further improved.
[0044]
When the net of the embodiment shown in FIGS. 9 to 11 is applied to the first embodiment or the second embodiment, the group of the warp yarns 10 is formed as the warp group 8 and the group of the weft yarns 11 is formed as the weft group 7. . Accordingly, a high elasticity portion is formed by increasing the weaving density of the group of the weft yarns 11.
[0045]
(5). Others The present invention can be embodied in various ways other than the above-described embodiment. For example, the frame only needs to be in a state where a large space is opened below the seating net. Therefore, the frame may have, for example, a concave shape or a bowl shape facing upward when viewed from the front.
[0046]
Also, for example, if the upper end of the back frame has a tendency to hit the back of the person when rocking, the upper part of the back net may be a high elasticity part, and conversely, the waist is projected at the lower part of the back frame. If such a phenomenon occurs, the lower part of the back net may be a high elasticity portion. Both the upper and lower parts can be high elastic parts.
[Brief description of the drawings]
FIG. 1 is a perspective view of a seat body of a chair according to a first embodiment.
FIG. 2 is a partially broken plan view of a seat.
FIG. 3 is a sectional view taken along line III-III of FIG. 2;
FIG. 4 is a plan view showing an example of a net.
FIG. 5 is a plan view of a seat according to a second embodiment.
FIG. 6 is a front view of a seat frame according to a third embodiment.
FIG. 7 is a schematic perspective view of a seat sparse and a back net.
FIG. 8 is a diagram showing an example of cutting out a net from a raw material.
FIG. 9 is a diagram three-dimensionally showing a net according to a third embodiment.
FIG. 10 is a plan view of a net according to a third embodiment.
FIG. 11 is a schematic diagram illustrating a state of a yarn according to a third embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 seat 2 backrest 3 frame for seat 4 frame for backrest 5 net for seat 6 net for backrest 7 weft group 8 warp group

Claims (3)

A chair in which the seat is configured such that elastically deformable nets are stretched on a frame having at least left and right sides and a front end,
A portion or a plurality of portions along the front-back direction of the nets is formed in a high elasticity portion having a relatively high elastic force as compared to other portions and extending over the entire left and right width of the nets,
Chair. At least the front portion of the nets is a high elasticity portion,
The chair according to claim 1. The nets are made of a woven or knitted fabric in which a weft group extending in the left-right direction and a warp group extending in the front-rear direction (or up-down direction) in front view are entangled, and a high elastic yarn is used as the warp group. And, by increasing the density of the weft group, increasing the cross-sectional area of the yarn, or using a material having high strength, a high elastic portion extending over the entire left and right width of the net is formed.
The chair according to claim 1.

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