JP2002165667A - Folding chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compactly foldable folding chair with light weight improved in the strength of a support leg. SOLUTION: This folding chair comprises a seat part 24 and a seatback part 25 formed by hooking the corner parts of a sheet 3 on a plurality of upper connecting members 7 of a chair frame 2. Each of the upper connecting member 7 and a lower connecting member 17 are formed of a spirally elastic spiral body 21 formed by spirally turning the middle part of a round bar body consisting of synthetic resin material and having connecting parts at both ends. The connecting parts of the spiral body 21 are connected to long pipes 6a and 6b and short pipes 10a and 10b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding chair which is easy to assemble and fold, is easily carried around a resort, and is convenient for outdoor use.

[0002]

2. Description of the Related Art A folding chair has a skeleton including supporting legs made of an aluminum pipe, and a seat portion and a backrest portion made of a sheet of cloth or the like. In addition, four supporting legs in the front, rear, left and right are connected by a reinforcing member crossing in an X shape so as to be as compact as possible at the time of folding, and at the time of folding, the four supporting legs are aligned substantially in parallel, and at the same time, the seat portion is And the backrest portion is folded.

[0003]

However, since the conventional folding chair has a structure in which the four supporting legs are connected by the auxiliary member, it cannot be assembled unless the four supporting legs are forcibly pushed open. There is an inconvenient aspect.

[0004] The present invention has been made in view of the above circumstances, and its object is to reduce the weight and
An object of the present invention is to provide a folding chair that can be automatically assembled with one touch.

[0005]

In order to achieve the above object, a first aspect of the present invention is a pair of left and right long pipes formed by connecting a pair of long pipes by an upper connecting member to form an inverted V shape. And a pair of left and right front support legs formed into an inverted V shape by connecting a pair of short pipes by an upper connecting member, and one long pipe adjacent to the rear support legs. The two short pipes adjacent to each other and the front support leg are crossed in an X-shape, the cross portions are rotatably connected, and the other long pipe adjacent to the rear support leg and the front portion are connected to each other. The other short pipe of the supporting leg is crossed in an X shape, the crossing portion is rotatably connected to connect the pair of rear supporting legs and the pair of front supporting legs, and the left and right rear portions. A long pipe of the supporting leg and a short pipe of the pair of left and right front supporting legs; A foldable chair in which a lower frame is connected to form a V-shape to form a chair frame, and a plurality of upper link members of the frame are hooked to a corner of a seat to form a seat and a backrest. Wherein the upper connecting member and the lower connecting member are helically turned around an intermediate portion of a round bar made of a synthetic resin material to form connecting portions at both ends, and a helical body having elasticity in the turning direction. And connecting the connecting portion of the spiral body to the long pipe and the short pipe,
The turning direction of the spiral body between the pair of left and right upper connecting members and the lower connecting member is opposite to each other, and is symmetrical.

According to a second aspect of the invention, one set of two long pipes is connected by an upper connecting member to form a rear support leg formed in an inverted V shape, and two sets of short pipes are connected by the upper connecting member. One front support leg formed into an inverted V shape and a pair of short pipes are connected by an upper connecting member to form an inverted V shape.
A pair of left and right side support legs formed in a shape, and a long pipe of the rear support leg and one short pipe of the side support leg are crossed in an X shape, and the cross portion is rotatably connected. The short pipe of the front support leg and the other short pipe of the side support leg are crossed in an X-shape, and the crossing portion is rotatably connected to connect the rear support leg and the front support leg. And a pair of side supporting legs connected to each other, and a long pipe of the rear supporting leg and a short pipe of the front supporting leg are connected by a lower connecting member to form a V-shape. The short pipes are connected to each other by a lower connecting member to form a V-shape to form a chair frame, and a plurality of upper connecting members of the chair frame are hooked at corner portions of a seat to form a seat portion and a backrest portion. Folding chair, wherein the upper connecting member and the lower connecting portion And the intermediate portion of the round bar member made of a synthetic resin material is spirally swirls to form a connecting portion at both ends,
The spiral body having elasticity in the turning direction is connected, and the connecting portion of the spiral body is connected to the long pipe and the short pipe, and the turning direction of the spiral body between the pair of left and right upper connecting members and the lower connecting member is adjusted. It is characterized by being symmetrical in the opposite direction.

[0007] According to the above-described structure, the long pipe and the short pipe are maintained at a constant angle by the elastic restoring force of the spiral body constituting the upper connecting member and the lower connecting member, so that they are maintained in a stable state. You. Also, when folded when not in use, the helical body is bent in the direction of aligning the long pipe and the short pipe against the elastic restoring force of the helical body constituting the upper connecting member and the lower connecting member, and the bundle is bound. A long pipe and a short pipe, including a sheet, are bound by a band, so that the pipe can be stored compactly.

[0008]

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

1 to 4 show a first embodiment, and FIG.
2 is a perspective view of a folding chair, FIG. 2 is a perspective view of a folded state, FIG. 3 is a perspective view of a chair skeleton, FIG. 4 is a front view and a side view of a connecting member. And a seat 3.

Referring to FIGS. 1 to 3, the chair frame 2 will be described. The chair frame 2 includes a pair of left and right rear support legs 4, 5, which are formed of a light metal such as an aluminum pipe. A set of two long pipes 6
The upper end portions a and 6b are connected to each other by an upper connecting member 7 described later to form an inverted V shape.

Further, a pair of left and right front support legs 8 and 9 are provided. The front support legs 8 and 9 connect a pair of short pipes 10a and 10b by the same upper connecting member 7 as described above. They are connected to form an inverted V shape.

Adjacent one of the long pipes 6a, 6a adjacent to the rear support legs 4, 5 are crossed in an X-shape.
Are rotatably connected by a pivot pin 12. Similarly, one short pipe 1 adjacent to the front support legs 8, 9
0a and 10a are crossed, and the crossing portion 13 is rotatably connected by a pivot pin 14.

Further, the other long pipes 6b, 6b adjacent to the rear support legs 4, 5 and the other short pipes 10b, 10b of the front support legs 8, 9 are crossed in an X shape, and the cross section 15 is formed. Are rotatably connected by pivot pins 16. Therefore, the pair of rear support legs 4, 5 and the pair of front support legs 8, 9 are connected.

The long pipe 6a and the short pipe 10
b, the long pipe 6b and the short pipe 10a are connected to each other at a lower end by a lower connecting member 17 described later to form a V shape.

The upper connecting member 7 and the lower connecting member 17
Have the same structure and are configured as shown in FIG.
That is, a spiral portion 19 which is spirally turned is formed at an intermediate portion of a round rod-shaped body 18 made of a synthetic resin material, and a spiral portion which forms a connecting portion 20 which is widened at an angle of, for example, 75 ° is formed at both ends. The body 21 is formed.

Further, as shown in FIG. 5, in the upper connecting member 7 and the lower connecting member 17, the spiral direction of the spiral portion 19 is opposite in the left and right directions, and the front support legs 8, 9,
The rear support legs 4, 5 and the upper connecting member 7 are symmetrical in the left-right direction. Therefore, in the use state, the folding chair 1
Stability can be improved.

The helical body 21 has elasticity in the turning direction due to the helical portion 19, and is restored to the original shape by the elastic restoring force even if the connecting portion 20 is pressed in the direction of arrow A to narrow the angle. It has become. The connecting portion 20 of the spiral body 21 is inserted into the ends of the long pipes 6a and 6b and the short pipes 10a and 10b, and is connected by a caulking pipe 22.

The sheet 3 is made of, for example, cloth.
It is formed in a substantially square shape. A substantially triangular pocket 23 opening toward the center of the seat 3 is provided at a corner of the seat 3. Each pocket 23 of this seat 3
The seat 3 is hung so as to cover the plurality of upper connecting members 7 of the chair frame 2, and a seat 24 and a backrest 25 are formed by the seat 3.

The folding chair 1 constructed as described above.
Is that the long pipes 6a and 6b and the short pipes 10a and 10b maintain a constant angle by the elastic restoring force of the spiral body 21 forming the upper connecting member 7 and the lower connecting member 17, and thus the stable state is maintained. Is done.

When folded when not in use, the helical members 21 constituting the upper connecting member 7 and the lower connecting member 17
By bending the helical body 21 in a direction in which the long pipes 6a, 6b and the short pipes 10a, 10b are aligned against the elastic restoring force of FIG. The long pipes 6a and 6b and the short pipes 10a and 10b including the sheet 3 are bound together.

Therefore, in use, the binding of the binding band is released to release the binding of the upper connecting member 7 and the lower connecting member 17.
The long pipes 6a, 6b and the short pipes 10 are automatically and simply operated with one touch by the elastic restoring force of the spiral body 21 constituting
Since a and b open at a certain angle, the state shown in FIG. 1 is obtained.

6 and 7 show a second embodiment. FIG. 6 is a perspective view of a folding chair, FIG. 7 is a perspective view of a chair frame, and a folding chair 31 is composed of a chair frame 32 and a seat 33. It is composed of

Referring to FIG. 7, the chair frame 32 will be described. One rear support leg 34 is provided, and the rear support leg 34 is a pair of long members formed of a light metal such as an aluminum pipe. The pipes 36a and 36b are connected at the upper end by an upper connecting member 37 and
It is formed in a shape.

The front support leg 38 is provided with a pair of short pipes 40.
a and 40b are connected by the same upper connecting member 37 as described above to form an inverted V shape.

Further, a pair of left and right side support legs 35 is provided, and the side support legs 35 are formed into an inverted V shape by connecting a pair of short pipes 39a and 39b by an upper connecting member 37. Have been.

Long pipes 36a, 36 of the rear support legs 34
“b” crosses one short pipe 39 a of the side support leg 35 in an X shape, and the cross portion 41 is rotatably connected by a pivot pin 42. Similarly, the short pipes 40a and 40b of the front support leg 38 cross the other short pipe 39b of the side support leg 35 in an X-shape, and the cross portion 43 is rotatably connected by a pivot pin 44. I have.

Further, a long pipe 36 of the rear support leg 34
a, 36b and short pipes 40a, 40 of the front support leg 38.
b is formed in a V shape at the lower end portion by being connected by the lower connecting member 45. Further, the short pipes 39a and 39b of the side support legs 35 are connected to each other at a lower end by a lower connecting member 45 to form a V shape.

The upper connecting member 37 and the lower connecting member 4
5 has the same structure as that of the first embodiment, and a description thereof will be omitted.

Further, the sheet 33 is made of cloth, for example, and is formed in a substantially rhombic shape. A substantially triangular pocket 43 that opens toward the center of the seat 33 is provided at a corner of the seat 33. Each pocket 43 of the seat 33 is hung so as to cover a plurality of upper connecting members 37 of the chair frame 32, and a seat portion 44 and a backrest portion 45 are formed by the seat 33.

The folding chair 3 constructed as described above
1 is a long pipe 36a, due to the elastic restoring force of the spiral body 21 forming the upper connecting member 37 and the lower connecting member 45.
36b and short pipes 39a, 39b, 40a, 40b
Is maintained in a stable state since it maintains a constant angle.

When the helical member 2 is to be folded when not in use, the helical members 2 constituting the upper connecting member 37 and the lower connecting member 45
By bending the helical body 21 in a direction to align the long pipes 36a, 36b and the short pipes 39a, 39b, 40a, 40b against the elastic restoring force of 1, the sheet 33 is bent by a binding band (not shown). Including long pipes 36a, 36b and short pipes 39a, 39b, 40
a and 40b are united.

Therefore, in use, the binding of the binding band is released by releasing the binding of the binding band.
Since the long pipes 36a and 36b and the short pipes 39a, 39b, 40a and 40b are automatically opened at a certain angle by one-touch operation by the elastic restoring force of the spiral body 21 constituting 5, the state shown in FIG. 6 is obtained.

Further, the storage bag 46 for storing the folding chair 31 in a folded state is folded and wrapped, and is mounted on the upper portion of the backrest 45 to be used as a headrest.

[0034]

As described above, according to the present invention, folding and assembling can be performed with one touch, and it is lightweight and can be compactly folded when not in use. Further, since the upper connecting member and the lower connecting member are formed by a spiral body,
Since there is no edge portion, it is safe, and there is no risk of damaging the floor when used indoors.

[Brief description of the drawings]

FIG. 1 is a perspective view of a folding chair according to a first embodiment of the present invention in an assembled state.

FIG. 2 is an exemplary perspective view of the embodiment in a folded state;

FIG. 3 shows the same embodiment, and is a perspective view of a chair frame.

FIG. 4 is a front view and a side view showing the spiral body of the embodiment.

FIG. 5 is an exemplary front view showing a pair of left and right spiral bodies according to the embodiment;

FIG. 6 is a perspective view of a folding chair according to a second embodiment of the present invention in an assembled state.

FIG. 7 is a perspective view of the chair frame, showing the same embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Foldable chair 2 ... Chair frame 3 ... Seat 4, 5 ... Rear support leg 6a, 6b ... Long pipe 7 ... Upper connecting member 8, 9 ... Front supporting leg 10a, 10b ... Short pipe 17 ... Upper connecting member 24 ... seat 25 ... backrest

Claims (2)

[Claims] 1. A pair of left and right rear support legs formed by connecting a pair of long pipes by an upper connecting member to form an inverted V shape, and connecting a pair of short pipes by an upper connecting member. A pair of left and right front support legs formed in an inverted V shape, wherein one long pipe adjacent to the rear support leg and one short pipe adjacent to the front support leg cross each other in an X shape. The crossover portion is rotatably connected, and the other long pipe adjacent to the rear support leg and the other short pipe of the front support leg cross each other in an X-shape, and the crossover portion is rotated. The pair of rear support legs and the pair of front support legs are connected freely, and the long pipes of the pair of left and right rear support legs and the short pipes of the pair of left and right front support legs are lowered. It is connected by a connecting member to form a V-shape to form a chair frame, A foldable chair in which a seat portion and a backrest portion are formed by hanging a corner of a seat on a plurality of upper connecting members of the chair frame, wherein the upper connecting member and the lower connecting member are made of a synthetic resin material. The intermediate portion of the round bar is spirally turned, and connecting portions are formed at both ends to form a spiral having elasticity in the turning direction, and the connecting portion of the spiral is connected to the long pipe and the short pipe. A foldable chair characterized in that a pair of left and right upper connecting members and a lower connecting member have helical bodies that are turned in opposite directions and symmetrical. 2. A rear support leg formed by connecting a pair of long pipes by an upper connecting member to form an inverted V shape, and a pair of short pipes being connected by an upper connecting member to reverse the pair. A front support leg formed in a V shape; and a pair of left and right side support legs formed in an inverted V shape by connecting a pair of short pipes by an upper connecting member. The long pipe and one of the short pipes of the side support legs are crossed in an X shape, and the crossed portions are rotatably connected, and the short pipe of the front support leg and the other of the side support legs are connected to each other. A short pipe is crossed in an X shape, and the crossing portion is rotatably connected to connect the rear support leg to the front support leg and a pair of side support legs, and the long pipe of the rear support leg is connected. And the short pipe of the front supporting leg are connected by a lower connecting member to form a V-shape. At the same time, the short pipes of the side supporting legs are connected to each other by a lower connecting member to form a V-shape to form a chair frame, and a plurality of upper connecting members of the chair frame are hooked with corner portions of the seat. A folding chair having a seat portion and a backrest portion, wherein the upper connecting member and the lower connecting member are spirally turned around an intermediate portion of a round bar-shaped body made of a synthetic resin material, and the connecting portions are provided at both ends. A spiral body having elasticity in the turning direction is formed, and a connecting portion of the spiral body is connected to the long pipe and the short pipe, and a pair of left and right upper connecting members and a lower connecting member are formed of a spiral body. A folding chair, characterized in that the turning direction is opposite and symmetrical.