JP2002142902A - Folding chair - Google Patents

Abstract

(57) An object of the present invention is to provide a folding chair which can secure a wider seating surface and can surely and stably support a spindle portion rotatably attaching the seat to a leg. A seat receiving portion for attaching an upholstery forming a seat surface is provided with a pair of hanging walls having a surface portion extending substantially along a thickness direction of the seat. In this state, the rear leg frame 3 can be accommodated between the hanging walls 612, and both end portions q1 and q2 of the second shaft q that supports the upper end portion of the rear leg frame 3 so as to be rotatable in the forward and reverse directions. 612.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding chair suitably used in an office or the like.

[0002]

2. Description of the Related Art As a folding chair of this kind, conventionally,
A seat, a front leg frame rotatably supporting the front end side of the seat, and a rear leg frame rotatably connected to the front leg frame and rotatably supporting the rear end side of the seat. In some cases, the front leg frame, the rear leg frame, and the seat can be folded from a used state to a folded state in which the front leg frame and the rear leg frame are substantially flush with each other.

[0003] A seat in this type of folding chair usually includes a seat body and a seat receiving portion for supporting the seat body. The seat body is configured by covering the cushion member with a vinyl cover or the like, and the seat receiving portion is formed of a metal round pipe member similar to the front and rear leg frames, and has a substantially rectangular shape in plan view. It is. The round pipe member that constitutes the seat receiving portion is usually located on the inner side of the front and rear leg frames, and is rotatable in the forward and reverse directions via the support shaft on the inner side surface of the inner leg frame. It is supported by.

[0004]

In this type of chair, it is desirable to secure a wider seating surface and improve the sitting comfort. However, since the conventional seat receiving portion uses a round pipe member, the distance between the front and rear leg frames is reduced to improve the appearance, or the front and rear leg frames and the seat receiving portion in the folded state are used. In order to prevent interference and to fold thinly, it is inevitable to position the seat receiving portion inside the front and rear leg frames, and it is difficult to secure a wider width of the seat surface. Furthermore, in the conventional one, the seat receiving portion is cantilevered on the inner surface side of the leg frame via the support shaft portion, so that an excessive force is applied to the support shaft portion during the rotation operation or the seating. , Which may cause deformation or breakage.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a seat, a first leg frame for rotatably supporting one end of the seat in forward and reverse directions, and A second leg frame rotatably connected to the first leg frame in the forward and reverse directions and supporting the other end of the seat so as to be rotatable in the forward and reverse directions, A folding chair configured to be able to fold from a used state to a folded state in which the first and second leg frames are substantially flush with each other by a relative rotation of a first leg frame, a second leg frame, and a seat. The seat includes a seat receiving portion that supports a seat body, and the seat receiving portion is configured by arranging a pair of wall bodies having a surface portion extending substantially along the thickness direction of the seat so as to face each other. A first leg frame and a second leg frame between the walls in a folded state. One of the leg frames can be accommodated therein, and a support shaft that supports one end of the one leg frame so as to be rotatable in forward and reverse directions is supported by the two wall bodies. .

With such a configuration, either one of the first leg frame and the second leg frame is accommodated between a pair of walls constituting the seat receiving portion. One of the leg frames and the seat receiving portion can be folded in a substantially overlapped state, and the area occupied by the leg frame and the seat receiving portion in the width direction in the folded state is reduced. Larger width dimension can be secured. Furthermore, since both ends of the support shaft are supported in a double-supported state by using the two wall bodies, both ends can be reliably and stably supported even during the rotation operation or the seating. Thus, deformation and breakage can be effectively prevented, and the durability of the chair can be effectively increased.

In order to effectively secure the strength of the seat receiving portion, the seat receiving portion is provided with a horizontal wall connecting the walls and having a surface along the width direction of the seat. It is desirable to have a U-shape.

In order to reduce the weight of the chair as a whole, it is desirable that the wall is a thin plate.

In a preferred embodiment, the seat body is an upholstery which is attached in a state of being stretched in an opening formed by the seat receiving portion.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the folding chair 1 of the present embodiment has a front leg, which is a first leg frame that supports a rear end portion of a seat 4 so as to be rotatable in forward and reverse directions via a first axis p. A second frame rotatably mounted on the inside of the front leg frame 2 via a third shaft r and supporting the front end of the seat 4 in a forward and reverse direction via a second shaft q; , Ie, the front leg frame 2, the rear leg frame 3, and the seat 4 are positively connected via the first axis p, the second axis q, and the third axis r. The front leg frame 2 and the rear leg frame 3 are connected at a position where the inner surface of the front leg frame 2 and the outer surface of the rear leg frame 3 face each other from a use state P shown by a solid line in FIG. 3. The folded state Q shown by the imaginary line in FIG.
It is configured so that it can be folded. In the folded state Q, as shown in FIG. 4, the folding chair 1 can be stacked vertically with the front side down, together with other folding chairs 1 of the same shape.

The front leg frame 2 is substantially U-shaped made of a steel round pipe, and has a backrest 21 at an upper end.

The rear leg frame 3 has a substantially U-shape made of a steel round pipe. The rear leg frame 3 intersects the inside of the front leg frame 2 so as to form an X-shape in a side view, and the front leg frame 3 passes through a third shaft r. It is connected so as to be rotatable relative to the frame 2. In this embodiment, the rotation support 5 having the third axis r for rotatably supporting the rear leg frame 3 with respect to the front leg frame 2 is connected to the rear leg frame 3.
The center of rotation of the rear leg frame 3 and the seat 4 and the front leg frame generated when the seat 4 and the front and rear leg frames 2 and 3 are rotated between the use state P and the folded state Q by being slidably attached to the outside of the vehicle. The displacement of the separation distance between the rotation center 2 and the rotation center of the rear leg frame 3 is absorbed.

As shown in FIG. 2, the seat 4 is provided with a seat receiving portion 6 having an opening in the center and having a substantially rectangular shape in plan view, and attached to the seat receiving portion 6 while being stretched in the opening. A net-like upholstery 7 is provided, and a cushion portion is configured using the tension of the upholstery 7. 5 and 6 are diagrams in which the upholstery 7 is omitted.

In the use state P, the seat receiving portion 6 extends in the depth direction and forms a pair in the width direction, and connects the front end portions and the rear end portions of the left and right frame portions 61 to each other. The front and rear frame portions 62 each having a partial arc shape in a plan view are connected to each other by appropriate means such as welding. The left and right frame portions 61 and the front and rear frame portions 62 are configured so that the cross-sectional shape thereof is substantially U-shaped downward.

In this embodiment, as shown in FIGS. 5 to 7, the left and right frame portions 61 of the seat receiving portion 6 are provided with surface portions extending along the width direction of the seat 4. And a pair of left and right hanging walls 612 as a pair of wall bodies having a surface extending in the thickness direction of the seat 4 in a folded state Q. The rear leg frame 3 can be accommodated between the left and right hanging walls 612, and both ends of the second shaft q, which is a support shaft portion that supports the upper end portion of the rear leg frame 3 so as to be rotatable in forward and reverse directions. q1 and q2 are supported by the left and right hanging walls 612. The rear sides of the left and right frame portions 61 are open so that the rear leg frame 3 can be accommodated between the left and right hanging walls 612 of the left and right frame portions 61 of the seat receiving member 6. As shown in FIG. 7, the width dimension of the top wall 611 and the vertical dimension of the hanging wall 612 of the left and right frame portions 61 are set larger than the diameter of the cross section of the rear leg frame 3.

With such a configuration, the rear leg frame 3 is accommodated between the left and right hanging walls 612 constituting the seat receiving portion 6, so that the rear leg frame 3 and the seat receiving portion 6 are connected to each other. It can be folded by being superposed, and the area occupied by the leg frames 2 and 3 and the seat receiving portion 6 in the width direction in the folded state is reduced, and as a result, the width dimension of the seat surface is larger than that of the conventional one. It is possible to secure. Furthermore, since both ends q1 and q2 of the second shaft q are supported by the left and right hanging walls 612 to enable support in a double-supported state, the two ends q1 and q2 can be securely held even at the time of rotating operation or seating. In addition, it is possible to stably support, and it is possible to effectively prevent deformation, breakage, and the like, and to effectively increase the durability of the chair 1.

A seat receiving portion 6 connects the hanging walls 612 to each other and has a top wall 6 having a surface extending substantially along the width direction of the seat 4.
11, the seat frame 6 has a substantially U-shape in cross section, so that the seat frame 6 has a substantially U-shape so that the seat frame 6 in the folded state can be effectively secured while maintaining its strength effectively. By reducing the area occupied by the leg frames 2 and 3 in the width direction, it is possible to secure a large width dimension of the seat 4.

Since the top wall 611 and the hanging wall 612 are of a thin plate shape, the weight of the entire chair can be reduced.

Since the seat body is the upholstery 7 attached to the opening formed by the seat receiving portion 6 in a state of being stretched, the upholstery 7 is provided with a flexible width by securing a wider seat surface. A chair with improved cushioning of the seat 4 can be realized, and the weight of the entire chair can be reduced.

It should be noted that the configuration of the present invention is not limited to those described above, and other configurations can be variously modified without departing from the spirit of the present invention.

[0022]

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

That is, according to the present invention, the seat receiving portion for supporting the seat body is constituted by arranging a pair of wall members having surfaces extending substantially along the thickness direction of the seat so as to face each other. In this case, either one of the first leg frame and the second leg frame can be accommodated between the wall bodies, so that the width of the seat surface is larger than that of the conventional one, It is possible to improve the sitting comfort of the seat. In addition, since the support portion is supported by the both walls, and the support portion can be supported in a double-supported state, both end portions thereof can be reliably and stably supported even during the rotation operation or the seating. This makes it possible to effectively prevent deformation, breakage, and the like, and to effectively increase the durability of the chair.

If the seat receiving portion has a substantially U-shaped cross section comprising a horizontal wall connecting the walls and having a surface extending along the width direction of the seat, the seat receiving portion has a substantially U-shape. By making the shape, the strength of the seat receiving portion can be effectively secured.

If the wall is a thin plate, the weight of the entire chair can be reduced.

If the seat body is an upholstery that is attached in a state of being stretched in the opening formed by the seat receiving portion, the upholstery is provided with a flexible width by securing a wider seat surface. A chair with improved cushioning properties can be realized, and the weight of the chair as a whole can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a side view showing a use state and a folded state of the chair.

FIG. 4 is a side view showing a state where a plurality of chairs are stacked in the folded state.

FIG. 5 is a front view showing a folded state of the chair without the staying ground;

FIG. 6 is a perspective view showing a state where the main part is viewed from below.

FIG. 7 is an enlarged sectional view taken along the line II in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Folding chair 2 ... 1st leg frame (front leg frame) 3 ... 2nd leg frame (rear leg frame) 4 ... Seat 6 ... Seat receiving part 611 ... Horizontal wall body (top wall) 612 ... Wall body (hanging down) Wall) 7 ... upholstery q ... shaft part (second axis) P ... usage state Q ... folded state

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoko Iida 6-1-1, Oimazato-Minami, Higashi-Nari-ku, Osaka-shi Inside KOKUYO Co., Ltd. Inside Furniture Development Dept. (72) Inventor Tohru Aoyagi 5331 Nishiharu Kinoshita Kawahara Ina-shi, Nagano Prefecture Takano Co., Ltd. Inside Furniture Development Dept.

Claims (4)

[Claims] 1. A seat, a first leg frame rotatably supporting one end of the seat in a forward / reverse direction, and a first leg frame rotatably connected to the first leg frame in a forward / reverse direction. And a second leg frame that supports the other end of the seat so as to be rotatable in forward and reverse directions, and is used by the relative rotation of the first leg frame, the second leg frame, and the seat. A folding chair configured to fold the first and second leg frames from a state to a substantially flush folding state, wherein the seat includes a seat receiving portion that supports a seat body. The seat receiving portion is configured by arranging a pair of wall bodies having surface portions extending substantially along the thickness direction of the seat so as to face each other, and a first leg frame and a first leg frame are provided between the wall bodies in a folded state. And one of the second leg frames can be accommodated therein. A folding chair, wherein a support shaft for rotatably supporting one end of the one leg frame in a forward / reverse direction is supported by the both walls. 2. A seat receiving part having a horizontal U-shaped cross section comprising a horizontal wall connecting the wall bodies and having a surface extending substantially along the width direction of the seat. The folding chair according to claim 1, wherein the folding chair is provided. 3. The folding chair according to claim 1, wherein the wall is a thin plate. 4. The folding chair according to claim 1, wherein the seat body is an upholstery that is attached in a state of being stretched in an opening formed by the seat receiving portion.