JP2002142905A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with which, when many of it, having a structure of front legs, rear legs, a seat and a back part whose fixing position can be changed, are arrayed in rows, space can be saved and aisles between rows can be widened and which has a good sitting comfortableness. SOLUTION: The back part 4 is positioned along the front-curved area Ma of the sitting person's back. The position for the scapulas is released. By doing these, the width w1 from the front to the rear of the chair A is lessened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and comfortable chair.

[0002]

2. Description of the Related Art Conventionally, the front and rear width of the entire chair is defined by the mounting height of the backrest, and the dimension between the front end of the front leg or the front end of the seat and the rear end of the backrest is the front and rear width of the chair. Chairs configured to be sized are known. Such chairs include, for example, a front leg tilted rearward, a rear leg rotatably supported at an intermediate height position of the front leg in a forward tilted posture, and a seat rotatably supported with respect to the front leg and the rear leg. There has been proposed a folding chair which is provided with a backrest portion at an upper end portion of a front leg, and is configured to support a back of a seated person from behind.

[0003]

By the way, in the case of such a folding chair, in order to maintain strength, the backrest is often attached with both ends thereof along the upper end of the front leg.
In such a case, in order to arrange the backrest portion for the inclined front leg at a high position, the front leg must inevitably extend upward, and the backrest portion is provided at the upper end of the extended front leg. Since it is attached, the position of the backrest portion is positioned rearward when viewed from the whole chair. In some cases, the width of the chair may fit within the rear end of the seat or leg, but if the front leg is inclined, the mounting position of the backrest with respect to the front leg is set higher than a certain value, so that the width of the entire chair can be reduced. The dimensions will change. Therefore, when a large number of such folding chairs are arranged side by side in a limited space such as a gymnasium, the front and rear width of the entire chair becomes relatively large depending on the mounting height position of the backrest portion with respect to the front legs. If you try to increase the number of seats by increasing the number of chairs arranged in a row, the width of the passage formed between the front and rear chairs will be narrow and it will be difficult to pass, and the distance from the front seat will be narrowed and oppression will be felt On the other hand, if the passage is widened with priority given to ease of passage and room for sitting, the number of chairs and the number of seats must be reduced.

[0004] In order to solve the above-mentioned problems, the present invention can arrange more chairs and provide a wider passage when many chairs are arranged in front and rear. Is to provide a chair that can provide comfortable sitting comfort.

[0005]

That is, a chair according to the present invention comprises a front leg, a rear leg seat, and a backrest, and has a structure in which the front and rear width of the entire chair can be changed depending on the mounting height of the backrest. Wherein the backrest is arranged along the lumbar lordosis of the seated person, and the position corresponding to the scapula is open.

[0006] Here, the chair "has a structure in which the front and rear width of the entire chair can be changed depending on the mounting height of the back portion" always defines the front and rear width dimensions of the chair by the mounting height position of the back portion. Of course, it includes a chair with a structure, but a chair that can be used in multiple states by operating a part of the chair, such as the backrest, the seat, and the legs. A chair having a structure in which the front and rear width dimensions of the entire chair may be defined by the mounting height of the backrest portion even in the state is also included.

[0007] With such a configuration, the conventional chair is provided in such a manner that the backrest, which defines the front-to-rear width of the entire chair, is disposed at a relatively low position for supporting the waist of a standard adult as a seated person. When compared with a chair having a backrest portion that supports the back of a seated person as described above, the width of the chair in the front-rear direction can be reduced. Therefore, if a large number of chairs are arranged side by side in the front-rear direction, the area in the front-rear direction occupied by one chair becomes smaller, so that in a place with the same area, more chairs are arranged than conventional chairs to increase the number of seats Will be able to do it. On the other hand, when the chairs are arranged back and forth at the same pitch as the conventional chair, a wide passage formed between the chairs can be ensured, so that the passage of the passage is improved, and the seating position is improved. The feeling of oppression can be eliminated. Further, since the reclining portion is arranged at a position just supporting the lordosis of the waist, when the occupant turns his or her body backward, it is possible to easily take a refreshing posture in which the back is straightened.

In such a chair, when the front leg is gradually inclined rearward upward, in order to attach the backrest to the front leg while maintaining the strength with a simple structure,
It is desirable to form an attachment portion directly attached to the back portion along the front leg.

[0009] In a preferred embodiment of the chair having such a configuration, the upper end of the rear leg is supported in a forwardly inclined position at an intermediate height position of the front leg which is disposed so as to be gradually inclined rearward upward. At the same time, the seat is supported over the front leg and the rear leg, the backrest is disposed at the upper end of the front leg, and the rear end of the front and rear width of the entire chair is defined by the rear end of the backrest. No.

[0010] Particularly in a gymnasium or the like where the chairs are not always arranged but only when necessary, the upper end of the rear leg can be rotated on the front leg so that the arranged chairs can be compactly cleared. It is preferable that the front leg and the rear leg are rotatably supported by the front leg and the rear leg so that the front leg, the rear leg and the seat can be folded.

In particular, in order to be able to favorably support the occupant along the curved shape in front of the lumbar lordosis of the occupant, the upper end side of the reclining surface of the reclining portion which comes into contact with the occupant. It is preferable that a rear inclined surface is formed at the lower end, and a front inclined surface is formed at the lower end side, so that the rear inclined surface and the front inclined surface are integrally continuous.

In this case, in order to further improve the sense of stability when the occupant leans on the reclining portion, the rear inclined surface and the forward inclined surface are moved to a position corresponding to the lumbar lordosis of the occupant. Is preferably continuous.

[0013] Further, in order to realize stable support of the buttocks of the seated occupant as well as when leaning on the seat, a seating surface inclined backward is set on the upper surface side of the seat, and the seating surface and the forwardly inclined seating surface are set. It is effective to form a wedge-shaped seating space with the surface.

[0014]

An embodiment of the present invention will be described below with reference to the drawings.

The chair A of this embodiment shown in FIG. 1 is a so-called folding type having a front leg 1, a rear leg 2, a seat 3, and a backrest 4.

As shown in FIGS. 1 and 2, the front leg 1 is formed by bending a single, for example, aluminum round pipe material, so that a pair of left and right front tilts is disposed in a posture of gradually tilting rearward upward. A horizontal portion 12 is formed to connect the lower end portion 11b of the forward inclined portion 11 to each other in a substantially horizontal posture. The horizontal portion 12 includes a pair of left and right resin ground members 13.
To stabilize when the chair A is opened and put into a use state. Here, the length dimension of the forward inclined portion 1 of the present embodiment is about 729 mm.

Similarly, as shown in FIGS. 1 and 2, a pair of right and left rear legs 2 are arranged by bending one aluminum round pipe material so as to be inclined forward gradually upward. Rear inclined portion 21 and lower end portion 2 of rear inclined portion 21
The main body is formed with a horizontal portion 22 that connects the 1b with each other in a substantially horizontal posture. One rod is inserted into the upper end portion 21a of the rear inclined portion 21 so as to be able to protrude and retract, and the upper end portion of the rod is placed at an intermediate height position of the front inclined portion 11 of the front leg 1 via a fixture 24. It is rotatably mounted. The rods do not appear in the drawings because the drawings show the use state of the chair A, but the rods gradually project from the upper end 21a of the rearwardly inclined portion 21 in the process of folding the chair A from the use state. Is what you do. A pair of left and right resin ground members 23 are attached to the horizontal portion 22 in the same manner as the front leg 1.

As shown in FIGS. 1 and 2, the seat portion 3 is provided with a seat plate 32 having a substantially face plate shape formed by integral molding of a synthetic resin on a seat frame 31 made of an aluminum round pipe material or the like having a rectangular shape. The upper surface of the seat plate 32 is a seating surface 3A. However, the side portion of the seat frame 31 is rotatably attached to the front leg 1 and the rear leg 2 in a posture in which the entire seat portion 3 is inclined such that the rear end portion is lower than the front end portion side. . Here, when mounting the seat 3, the seat frame 31 is directly screwed to the front leg 1 at an intermediate height position of the front inclined portion 11, and the upper end of the rear inclined portion 21 to the rear leg 2. It is screwed to the bracket 25 provided in the section. The rearward tilt angle of the seat 3 is set to, for example, about 7 to 8 degrees with respect to a horizontal plane.

As shown in FIGS. 1 and 2, the backrest portion 4 is a plate-like member formed by integrally molding a synthetic resin, and has a front side in contact with the waist of a seated person to open the scapula. The supporting surface 41 is supported. The reclining surface 41 is placed at an intermediate height position and is curved so as to form a shape of “C” when viewed from the side, and has a rear inclined surface 41a having its upper end side inclined upward and rearward, The lower end side is a forward inclined surface 41b inclined downward and rearward. Note that the rearward inclination angle of the rearward inclination surface 41a and the forward inclination angle of the forward inclination surface 41b correspond to the upward rearward inclination angle and the downward forward inclination angle in the lordotic shape of the lumbar vertebra in a normal adult, respectively. For example, it is set to about 25 ° and about 10 ° with respect to the vertical plane. Cylindrical through-holes 42 that open downward as mounting portions are formed at both side ends of the backrest 4, and the upper end 11 a of the forward inclined portion 11 is inserted into and fitted into the through-holes 42. As a result, the backrest 4 is attached to the front leg 1. When the backrest 4 is attached to the front leg 1 in this manner, a space having a predetermined size is formed between the backrest 4 and the seat 3 in the vertical direction. The wedge-shaped space formed by the seating surface 3A is a seating space S.

The upper end of the backrest 4 is bent so as to protrude rearward, and the rear end 4x of the bent portion is bent.
However, it is arranged to be the rear end of the entire chair A. The front end of the chair A is defined by the front end of the front leg 1, that is, the lower end 11b of the front inclined portion 11 or the horizontal portion 12 or the grounding member 13, and the front and rear width dimension w1 of the folding chair A (this embodiment). Approximately 429mm in form)
Is determined by the horizontal distance from the front end of the backrest 4 to the rear end 4x. Further, the height dimension h1 (about 685 mm in this embodiment) of the chair A is defined by the vertical distance from the lower ends of the front legs 1 and the rear legs 2 to the upper end of the backrest portion 4. The length of the front leg 1 in the direction along the front inclined portion 11, that is, the length L1 when the chair A is folded is about 800 mm in the present embodiment.

Next, a case where a large number of chairs A having such a configuration are arranged in the front-rear direction in a place such as a gymnasium will be described. For comparison with the present embodiment, a configuration and an arrangement example of a conventionally known chair B will be briefly described first.

A conventional chair B shown in FIG. 5 is of a foldable type having substantially the same configuration as the chair A of the present embodiment, and includes a front leg 110, a rear leg 120, a seat 130, and a backrest 1.
40 is provided. Then, the front inclined portion 111 of the front leg 110
Of the front leg 1 in the present embodiment (approximately 737 mm).
Is longer than the size of the front inclined portion 11 (about 729 mm described above), and the backrest 140 is attached to the upper end thereof. The backrest portion 140 is a so-called backrest attached to a position for supporting the back of the seated person, specifically, a kyphosis portion that becomes convex behind the thoracic vertebra. ing. In such a chair B, the front-rear width dimension w2 (about 485 mm) corresponds to the horizontal distance from the front end of the front leg 110 to the rear end of the backrest 140, and the height dimension h2 (about 730 mm) is used for the front leg 110 and the rear leg. It corresponds to the vertical distance from the lower end of 120 to the upper end of the backrest 140. Further, a dimension L2 in the direction along the forwardly inclined portion 111, which is a longitudinal dimension when the chair B is folded, is longer than the same dimension L1 of the chair A of the present embodiment, and is about 846.
mm. And FIG. 5 shows such a chair B,
A case is illustrated in which three chairs B are arranged in a region of a predetermined length D with a space corresponding to a passage R having a width dimension d1 between front and rear chairs B.

On the other hand, the chair A of the present embodiment is similar to that of FIG.
When a passage R having a width dimension d1 is secured in the area of the length D and arranged side by side as shown in FIG. 2, the front and rear width dimension w1 of the chair A is smaller than the front and rear width dimension w2 of the conventional chair B. Since the chair A on the rear side of the state shown in FIG. 5 can be arranged closer to the front, a larger number of chairs A can be arranged.

On the other hand, when the chairs A of this embodiment are arranged side by side in the same number (three) as the conventional chair B shown in FIG. 5 as shown in FIG. A
Is smaller than the front and rear width dimension w2 of the conventional chair B, and the width dimension d2 of the passage R formed between the front and rear chairs A is larger than the width dimension d1. Can be secured wider than R, and a sufficient sitting space can be obtained by widening the foot space at the time of sitting.

Regardless of the position of the chair A in any state, when the occupant M sits down on the chair A, as shown by the imaginary line in FIG. It fits completely into the seating space S, and is stably held in the seating space S. In addition, the waist of the seated person M has a lordosis shape (referred to as a lumbar lordosis portion Ma) along with a lordosis shape that projects forward of the lumbar spine Mb. When the occupant M leans backward so as to make close contact with the reclining surface 41 of the fourth member 4, the portion where the rear inclined surface 41a and the front inclined surface 41b smoothly continue is a waist curved portion Ma.
Is pressed from behind, so that a moderate acupressure effect can be obtained. Of course, even in the normal sitting state of the seated person M, the shape of the back surface 41 corresponds to the shape of the lumbar lordosis Ma, so that the seated portion M can be supported by the back portion 4 with a high sense of stability. it can.

As described above, the lumbar lordosis Ma of the seated person M
The chair A according to the present embodiment has a structure in which the front-rear width dimension w1 of the entire chair A changes depending on the mounting height of the backrest portion 4 arranged so as to open the position corresponding to the scapula.
According to the conventional chair B, the front and rear width dimension w1 of the entire chair A is
Because it can be smaller and more compact than
When a plurality of chairs A are arranged side by side in the front-rear direction, a larger number of chairs A are arranged while securing a passage R having the same width dimension d1 as that of the conventional chair B in the area of the same length D to reduce the number of seats. On the other hand, when the same number of chairs A as those in the case of the conventional chair B are arranged in front and rear, a passage R having a wider width d2 is secured and the seat R is seated while improving the ease of the passage R. It is possible to eliminate the feeling of oppression at the time. Further, since the backrest 4 supports the lumbar lordosis Ma, the occupant M can easily take a refreshing posture in which the back is extended when the occupant M warps.

In particular, since the through hole 42 serving as a mounting portion formed in the backrest 4 is directly mounted along the front leg 1 inclined backward, the backrest 4 can be mounted on the front leg 1 with a simple structure. As a result, the strength of receiving the load applied to the backrest 4 can be easily secured.

The chair A according to the present embodiment is a folding chair which can be folded by rotating the front leg 1, the rear leg 2 and the seat 3, so that the chair A can be arranged only when necessary as in the above-described arrangement example. If you use it in a facility such as a gymnasium,
The arranged chairs A can be compactly cleared to save space during storage. In order to open the position corresponding to the scapula by arranging along the main lordosis Ma of the seated person M by the backrest 4, the length of the front inclined portion 11 of the front leg 1 is set to the length of the conventional chair. The front inclined portion 11 is supported so as to support from the shoulder blade to the vicinity of the shoulder of the seated person like the backrest portion 140 of FIG.
1 is set shorter than the length dimension, and the longitudinal dimension L1 when folded is shorter than the same dimension L2 of the conventional chair B. Therefore, when the chair A is folded, it is more compact than the conventional chair B. , Which greatly contributes to the reduction of storage space.

Further, the chair A supports the seat 3 over the front leg 1 and the rear leg 2 supported by the front leg 1,
The back end 4x of the backrest 4 arranged on the upper end 11a of the
It is designed to be the rear end of the entire front and rear width. And the upper end side of the back surface 41 set on the front side of the back portion 4 is a rear inclined surface 41a, and the lower end side is a forward inclined surface 41b.
Since the rear inclined surface 41a and the forward inclined surface 41b are integrally continuous, the entire shape of the backrest surface 41 is changed to the shape of the lumbar lordosis portion 4a of the seated person M accompanying the lordosis shape of the lumbar vertebra 4b. And the support of the waist of the seated person M can be made effective. Further, the rear inclined surface 41a and the front inclined surface 4
1b is formed at a position corresponding to the lumbar lordosis portion Ma of the occupant M, so that the lumbar lordosis portion 4a can be pushed backward by the continuous portion to obtain a comfortable acupressure effect. it can. Also, the rear inclined surface 41a and the front inclined surface 41b
The rear slope 41a supports the range from the waist 4a to the back of the seated person M, and the front slope 41b.
In this case, the range from the waist 4a to the buttocks Mc can be supported at an appropriate angle, and therefore, the stability when leaning on the backrest 4 can be improved.

Further, the buttocks Mc of the occupant M are seated in the wedge-shaped seating space S formed by the seating surface 3A inclined backward and the front inclined surface 41a of the backrest 4. The stability at the time can be further improved.

The present invention is not limited to the above embodiment, and the shapes and materials of the front and rear legs, seat, and backrest can be variously changed without departing from the spirit of the present invention. In particular, even if the rear end of the entire folding chair does not coincide with the rear end at the upper end of the backrest, if any part of the backrest is the rear end of the backrest, the position of the whole chair is It will be specified at the rear end.

Further, in the case of a chair in which the angle of the backrest can be changed, the rear end of the backrest is configured to coincide with the rear end of the front and rear width of the entire chair in one of the inclination angles. You can also. Further, in the folding chair, even when the folding chair can be used by changing the opening angle of the front leg and the rear leg, the rear end of the backrest portion is in one aspect of the opening angle of the chair. You may comprise so that it may correspond with the rear end of the whole front-back width. That is, the present invention is not limited to a structure in which the rear end of the backrest portion is always the rear end of the front and rear width of the entire chair as in the chair of the above embodiment, but includes a chair such as a backrest portion, a seat portion, and legs. The chair such that a plurality of use states can be obtained by operating the section, the rear end of the backrest portion has a structure that can be the rear end of the front and rear width of the entire chair in at least one use state. You can also.

Further, the present invention can be applied to various chairs other than the folding chair.

[0034]

The present invention is embodied in the form described above and has the following effects.

That is, according to the chair of the present invention, the front and rear width of the entire chair changes depending on the mounting height of the backrest arranged so as to open the position corresponding to the scapula along the lumbar lordosis of the seated person. Since the backrest portion is disposed at a lower position than a conventional chair having a backrest portion that supports the back of a seated person, the overall front-rear width is small and compact. be able to. As a result, when a large number of chairs are arranged side by side in the front-rear direction, the area in the front-rear direction occupied by one chair can be made smaller, so that more chairs are arranged at smaller intervals than conventional chairs. It is possible to increase the number of seats, and if you arrange chairs in front and behind at the same interval as conventional chairs, the passage between the chairs will be widened, improving the ease of passage and eliminating the feeling of pressure when sitting Becomes In addition, the reclining part is located at the position supporting the lumbar lordosis, so that when the occupant turns his body backwards, he can easily take a refreshed posture with his back straightened, and the comfort of sitting comfort is improved. There is no loss.

In the case where the mounting portion is formed so as to be directly mounted on the front leg which is inclined backward, the mounting portion can be mounted with a very simple mounting structure. It is also possible to easily maintain the strength for supporting the load of the occupant or the like on the part.

More specifically, the chair is supported at the middle height position of the front leg which is tilted rearward, with the upper end of the rear leg being tilted forward, and the seat is supported over the front leg and the rear leg. If the rear end of the backrest arranged at the upper end of the front leg is configured to be the rear end of the front and rear width of the entire chair, it is possible to easily form a chair having a simple configuration capable of achieving the above-described effects.

Further, in the case of a folding chair in which the rear legs are rotatably supported by the front legs and the seat is rotatably supported by the front legs and the rear legs, and the front legs, the rear legs and the seat are foldable. If used in a facility such as a gymnasium or the like where chairs are normally arranged only when needed without being arranged, it is possible to make the arranged chairs compact and useful.

In particular, in the back surface of the back portion, a rear inclined surface is formed on the upper end portion side, and a forward inclined surface is formed on the lower end portion side.
When the rearward inclined surface and the forward inclined surface are continuously formed integrally, the shape of the backrest surface corresponds to the shape curved forward of the lumbar lordosis of the seated person, and the seated person's hips Can be effectively supported. In this case, if a portion where the backward inclined surface and the forward inclined surface are continuous is formed at a position corresponding to the lumbar lordosis portion of the seated person, the continuous portion pushes the lumbar lordosis portion of the seated person just forward. It is possible to support the range from the waist to the back of the seated person on the back slope with the part inclined as the boundary, and to support the range from the waist to the buttocks on the front slope with an appropriate posture, respectively. It is possible to further improve the stability when the person leans on the leaning portion.

Further, if a seating space which is set to be inclined backward to the upper surface side of the seat portion and a front inclined surface of the backrest portion form a wedge-shaped seating space, the buttocks of a seated person are fitted into the seating space. Since it can be stuck, the stability at the time of sitting can be further improved.

[Brief description of the drawings]

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

FIG. 2 is a left side view showing the same embodiment.

FIG. 3 is an exemplary side view illustrating an arrangement example of the folding chair according to the embodiment;

FIG. 4 is an exemplary side view illustrating another arrangement example of the folding chair according to the embodiment;

FIG. 5 is a side view for explaining an example of arrangement of a conventional folding chair corresponding to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Front leg 2 ... Rear leg 3 ... Seat part 3A ... Seating surface 4 ... Rest part 4x ... Rear end 41 ... Rest surface 41a ... Rear inclined surface 41b ... Front inclined surface 42 ... Mounting part (through hole) A ... Chair S ... Seating space w1 ... front and rear width

Claims (7)

[Claims] 1. A structure comprising a front leg, a rear leg seat and a backrest, wherein the front and rear width of the entire chair can be changed according to the mounting height of the backrest. A chair arranged along a lumbar lordosis portion and having a position corresponding to a scapula open. 2. The chair according to claim 1, wherein the front leg is gradually inclined rearward upward, and a mounting portion is formed on the backrest along the front leg. 3. An upper end portion of the rear leg is supported in a forwardly inclined position at an intermediate height position of a front leg arranged so as to be gradually inclined rearward upward, and a seat portion is supported across the front leg and the rear leg. The chair according to claim 1, wherein the backrest is disposed at an upper end of a front leg, and a rear end of the front and rear width of the entire chair is defined by a rear end of the backrest. 4. An upper end of a rear leg is rotatably supported by a front leg, and a seat is rotatably supported by a front leg and a rear leg so that the front leg, rear leg, and seat can be folded. The chair according to claim 1, 2 or 3, wherein: 5. A reclining surface is formed on an upper end portion of a reclining surface of the reclining portion which contacts a seated person, and a forwardly inclined surface is formed on a lower end portion thereof. The chair according to claim 1, 2, 3 or 4, wherein the chair is continuous. 6. The chair according to claim 4, wherein the rearwardly inclined surface and the forwardly inclined surface are continuous at a position corresponding to a lumbar lordosis of a seated person. 7. A seating surface inclined backward to the upper surface of the seat portion,
The chair according to claim 5 or 6, wherein the seating surface and the forward inclined surface form a wedge-shaped seating space.