JPH11128018A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair having uniform cushion property without the fear of a breakage even when a comparatively thin wooden material is used for providing cushion property. SOLUTION: The chair 1 is constituted of a seat part 2, a leg part 3, a grounded part 4 and a seat back part 5 and obtained by bending a rectangular plywood having prescribed length in bending places 21, 31 and 41. That is, the leg part 3 is vertically formed at the front side of the horizontally formed grounded part 4 and the seat part 2 is formed in a horizontal direction from the leg part 3. Moreover, the seat back part 5 is formed by erecting at the rear side of the seat part 2. A coil spring 6 for supporting the seat part 2 from a lower part is fitted at the rear side of a part between the seat part 2 and the grounded part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a wooden chair. More specifically, the present invention relates to a chair which has a cushioning property and is not likely to be damaged even if a relatively thin wooden material is used, has a uniform cushioning property, and is easy to sit for a person with weak legs. It is.

[0002]

2. Description of the Related Art Chairs have been designed not only as tools for sitting but also as important materials for interiors. As such a chair, the inventor of FIG.
A chair emphasizing design, such as a wooden chair 7 shown in FIG. The chair 7 includes a seat portion 71, a leg portion 72, a ground contact portion 73, and a backrest portion 74, and is formed by bending a plate having sufficient strength.

The structure of the chair 7 will be described in detail. A leg 72 is provided vertically in front of a horizontally provided grounding portion 73, and a seat 71 is provided horizontally from the leg 72. I have. Further, the backrest 74 is provided upright on the rear side of the seat 71.

[0004]

The chair 7 is made firmly so as not to be easily damaged even with the above structure, and has a poor cushioning property and is not very comfortable to sit on.

The inventor of the present invention has attempted to produce a chair with excellent cushioning and comfortable seating by using a wooden material having the same structure as the chair 7 and having excellent design and elasticity. However, the production of such a wooden chair has the following problems. In other words, by using a wooden material having elasticity, when a person sits down, the boundary between the leg and the seat and the vicinity thereof are deformed, and a chair having cushioning properties can be obtained, but the strength is low. There was a problem. This is because the thickness of the wooden material must be relatively small in order to have elasticity. Therefore, unless some other measures are taken, the chair may not be able to bear the weight of the person and may be damaged.

The wooden material is a non-homogeneous material using natural wood as compared with metal, synthetic resin and the like. For this reason, even if the same thickness is used, the degree of deformation differs depending on the material. Therefore, when a chair having the above-described structure is manufactured from a wooden material, the cushioning property differs depending on the product, and the quality varies.

[0007] Further, with the aging of the population, there is a demand for a chair that is easy to sit for elderly people with weak legs. The conventional chair does not particularly devise the above point. For this reason, when you sit down on a chair or get up from a chair,
My feet and hips were strained.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and an object of the present invention is to provide a chair which is not likely to be damaged even if a relatively thin wooden material is used in order to provide cushioning. . It is another object of the present invention to provide a chair having a uniform cushioning property even when a wooden material which is a heterogeneous material is used. It is still another object of the present invention to provide a chair that can reduce the load on the legs when sitting or standing, and that is easy for a person with weak legs to sit.

[0009]

The means of the present invention taken to achieve the above object are as follows. According to the first invention, there is provided a chair provided with a seat, a leg, and a grounding unit integrally formed of an elastic wooden material, wherein the grounding unit is provided below the seat. The leg portion connects the seat portion and the ground portion on the front side, and the seat portion is supported from below by an elastic support member. A chair characterized by the following.

According to a second aspect of the present invention, there is provided a chair provided with a seat, a leg, and a grounding part integrally formed of an elastic wooden material, wherein the grounding part is provided below the seat. The seat portion is provided at a required interval, the leg portion connects the seat portion and the grounding portion on the front side, and the seat portion is
It is supported from below by a support member having elasticity,
A chair characterized by being substantially horizontal when a person is sitting and receiving a load, and having a rear portion that rises and tilts forward and downward when no load is applied.

According to a third aspect of the present invention, there is provided a chair provided with a seat, a leg, and a grounding unit integrally formed of a resilient wooden material, wherein the leg is provided horizontally with a ground. The chair is provided vertically on a front side of the section, and the seat is provided in a horizontal direction from the leg, and is supported from below by an elastic support member.

According to a fourth aspect of the present invention, in the chair according to the first, second or third aspect, the support member having elasticity is a spring.

The "elastic support member" in the present invention.
Is not limited only to a spring formed of a material such as metal, bamboo, wood, or the like, and a cushion material such as a urethane sponge or an air cushion can also be used.

(Operation) The seat portion is supported from below by an elastic supporting member. The support member can prevent excessive deformation such that the chair is broken without hindering elastic deformation at and around the boundary between the leg and the seat when a person sits. Therefore, it is possible to obtain a chair that has sufficient strength as a chair and has cushioning properties and is comfortable to sit on.

Further, by selecting and attaching support members having different elastic forces, it is possible to adjust the degree of deformation at the boundary between the leg and the seat and at the vicinity thereof. Therefore, even if a wooden material that is an inhomogeneous material is used, it is possible to obtain a chair having a uniform cushioning property and to prevent a variation in quality.

The seat portion is supported from below by an elastic supporting member, and is substantially horizontal when a person sits and receives a load, and the rear portion rises when no load is applied. It is designed to incline forward. That is, when a person sits down on the seat, the seat is inclined forward and downward. Therefore, the buttocks are in contact with the seat without bending the waist as much as the conventional chair. When a load is applied to the seat, the seat in the inclined state starts to deform in the horizontal direction. In addition, the support member elastically deforms in the compression direction together with the deformation of the seat while supporting the seat from below, and the seat slowly becomes horizontal while supporting the weight of the occupant. For this reason, compared with the conventional chair, since the strength of the foot can be released immediately after starting to sit, it is possible to sit down slowly and sit down. Therefore, the burden on the legs and hips can be reduced.

Since the support member contracted in the compression direction tends to be restored by the elastic force, an upward force always acts on the seat portion where the person is sitting. Therefore, when a person stands up from a chair, the center of gravity of the body may be moved forward. Then, the rear part of the seat starts to rise due to the restoring force of the support member,
You can easily get up from your chair without putting too much load on your feet and hips.

Therefore, the chair of the present invention is easy to sit for an elderly man with weak legs. The same effect can be obtained not only for the elderly, but also for those who have poor legs and / or injuries at the location.

[0019]

Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a first embodiment of a chair according to the present invention.
FIG. 2 is a side view of the chair shown in FIG. The chair 1 includes a seat 2, a leg 3, a ground contact 4, and a backrest 5, and is formed by bending a rectangular plywood having a required length at bending points 21, 31, and 41. can get. That is, the leg portion 3 is provided vertically in front of the horizontally provided grounding portion 4, and the seat portion 2 is provided in a horizontal direction from the leg portion 3. Further, the backrest 5 is provided upright on the rear side of the seat 2.

The method of folding the plywood is as follows. Saw-shaped cuts 211, 311, 41 in the bent portions 21, 31, 41 of the plywood over the entire length in the side direction.
Insert 1. Then, at the bent portion 21, the cut 211
The plywood is bent on the side opposite to the side where
At 41, the plywood is bent to the side where the cuts 311 and 411 are made. Lastly, the cuts 211, 311, 411
Is applied and filled in the places. In addition, the plywood used as the material has such a degree that a person sits on the seat portion 2 to apply a load, and the boundary between the leg portion 3 and the seat portion 2 and its vicinity are elastically deformed, so that a chair having cushioning properties can be formed. Thick.

A coil spring 6 which is a support member having elasticity for supporting the seat 2 from below is provided on the rear side between the seat 2 and the grounding portion 4. The coil spring 6 has elasticity in the compression direction and the tension direction. In addition,
The coil spring 6 has such an elasticity that does not hinder the deformation of the boundary between the leg 3 and the seat 2 and the vicinity thereof when a person sits down, and prevents excessive deformation such that the chair 1 is damaged. It has the strength that it can. The number of the coil springs 6 can be increased as necessary.

The seat 2 and the backrest 5 are provided with cushioning members 22 and 51, respectively, which are formed by upholstering urethane sponge. Cushion material 2
Reference numerals 2 and 51 are attached to the seat 2 and the backrest 5 by hook-and-loop fasteners.

(Operation) The operation of the chair 1 according to the present embodiment will be described with reference to FIGS. The seat 2 is supported from below by a coil spring 6. The coil spring 6 has elasticity in the compression direction and the tension direction, and does not hinder the elastic deformation of the boundary between the leg 3 and the seat 2 and the vicinity thereof when a person sits. In addition, the coil spring 6 supports the seat 2 from below, and prevents the chair 1 from being excessively deformed so as to be damaged. Therefore, it is possible to obtain a chair 1 having sufficient strength as a chair and having excellent cushioning properties and good sitting comfort.

Further, by selecting and mounting the coil springs 6 having different elastic forces, it is possible to adjust the degree of deformation at the boundary between the leg 3 and the seat 2 and in the vicinity thereof. For this reason, even if it uses plywood which is a heterogeneous material compared with metal, a synthetic resin, etc., the chair 1 which has uniform cushioning property can be obtained. Therefore, variation in quality can be prevented. Further, it is possible to form the elastic comfortable chair 1 suitable for each person having different weight. In addition, by attaching an elastic case to the coil spring 6 and covering the coil spring 6, it is possible to avoid the danger of catching a hand on the coil spring 6.

Since the grounding portion 4 is flat, the grounding surface is formed widely. For this reason, even if the chair 1 is placed on a tatami or carpet, the tatami or carpet is hardly damaged. If a hole is provided in the center of the grounding portion 4, the chair 1 can be reduced in weight. As long as the hole does not hinder the strength of the chair 1, the larger the hole, the higher the effect.

FIG. 3 is a perspective view showing a second embodiment of the chair according to the present invention, and FIG. 4 is a side view of the chair shown in FIG. 3 and 4, the same or equivalent parts as those shown in FIGS. 1 and 2 are denoted by the same reference numerals. The description of the parts shown in the first embodiment will be omitted, and differences will be mainly described.

The chair 1a comprises a seat 2a, legs 3, a ground contact 4, and a backrest 5. That is, the leg 3 is provided vertically in front of the horizontally provided grounding portion 4, and the seat 2 a is provided obliquely upward from the leg 3. Further, the backrest 5 is provided upright on the rear side of the seat 2.

(Operation) The operation of the second embodiment of the present invention will be described with reference to FIGS. Note that, among the functions shown in the first embodiment, the same ones are omitted.

When a person sits down on the cushion member 22, the seat portion 2a is inclined forward and downward. Therefore, the buttocks are in contact with the cushion member 22 without bending the waist as much as the conventional chair. When a load is applied to the seat portion 2a, the inclined seat portion 2a starts to deform in the horizontal direction. Further, the coil spring 6 holds the seat 2a while supporting the seat 2a from below.
The elastic portion is elastically deformed in the compression direction along with the deformation of a, and the seat portion 2a slowly becomes horizontal while supporting the weight of the occupant (the state shown by the dotted line). For this reason, compared with the conventional chair, since the strength of the foot can be released immediately after the start of sitting, it is possible to sit down slowly and sit down. Therefore, the burden on the legs and hips can be reduced.

Since the coil spring 6 contracted in the compression direction attempts to recover by the elastic force, the seat portion 2a in a state where a person is seated.
Always has an upward force. For this reason, the person
When you get up, move the center of gravity of your body forward. Then, the restoring force of the coil spring 6 causes the seat 2 a
The rear part starts to rise, and it is possible to easily get up from the chair 1a without putting much load on the feet and waist.

Therefore, the chair 1a is easy to sit for an elderly man with weak legs. The same effect can be obtained not only for the elderly, but also for those who have poor legs and / or injuries at the location.

[0032]

【The invention's effect】

(A) In the chair according to the present invention, the seat, the leg, and the grounding portion are integrally formed of an elastic wooden material, and are excellent in design. The seat is supported from below by a support member having elasticity. The supporting member can prevent excessive deformation such that the chair is damaged without hindering elastic deformation at and near the boundary between the leg and the seat when a person sits. Therefore, it is possible to obtain a chair that has sufficient strength as a chair and has cushioning properties and is comfortable to sit on.

(B) By selecting and attaching support members having different elastic forces, it is possible to adjust the degree of deformation at the boundary between the leg and the seat and the vicinity thereof. Therefore, even if a wooden material that is an inhomogeneous material is used, it is possible to obtain a chair having a uniform cushioning property and to prevent a variation in quality.

(C) In a chair in which the seat portion is inclined forward and downward, it is possible to sit down more slowly than a conventional chair due to the elastic deformation of the support member. For this reason,
The burden on the legs and hips can be reduced. When standing up from a chair, the center of gravity of the body may be moved forward. Then, the rear portion of the seat portion starts to rise due to the restoring force of the support member, and it is possible to easily stand up from the chair without putting much load on the feet and waist. Therefore, the chair of the present invention is easy to sit for a person with weak legs.

[0035]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a chair according to the present invention.

FIG. 2 is a side view of the chair shown in FIG.

FIG. 3 is a perspective view showing a second embodiment of the chair according to the present invention.

FIG. 4 is a side view of the chair shown in FIG. 3;

FIG. 5 is a perspective view of a conventional chair.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Chair 2, 2a Seat part 21 Bend part 211 Notch 22 Cushion material 3 Leg part 31 Bend part 311 Notch 4 Ground part 41 Bend part 411 Notch 5 Backrest part 51 Cushion material 6 Coil spring

Claims (4)

[Claims] A chair (1) comprising a seat (2), a leg (3) and a grounding part (4) integrally formed of an elastic wooden material, wherein the grounding part (4) is provided. Is provided below the seat (2) at a required distance from the seat (2), and the leg (3) connects the seat (2) and the grounding portion (4). A chair connected on the front side, wherein the seat (2) is supported from below by an elastic support member (6). 2. A chair (1a) provided with a seat (2a), a leg (3), and a grounding part (4) integrally formed of an elastic wooden material, wherein the grounding part (4) is provided. Is provided below the seat (2a) at a required distance from the seat (2a), and the leg (3) connects the seat (2a) and the grounding portion (4). The seat (2a) is supported from below by an elastic support member (6), and is substantially horizontal when a person sits and receives a load. The chair is characterized in that, when no load is applied, the rear part is raised and inclined forward and downward. 3. A chair (1) comprising a seat (2), a leg (3) and a ground contact (4) integrally formed of an elastic wooden material, wherein the leg (3) is provided. Is provided vertically in front of a horizontally provided grounding portion (4), the seat portion (2) is provided in a horizontal direction from the leg portion (3),
A chair which is supported from below by an elastic support member (6). 4. The chair according to claim 1, wherein the elastic supporting member is a spring.