JP7079009B2 - Folding frame and folding chair - Google Patents

Description

The present invention relates to a folding frame applied to a leg structure or a main body portion of furniture or outdoor equipment, and a folding chair provided with the folding frame.

Chairs used in conference rooms and halls are folded and stored when not in use. As an example of a folding chair, Japanese Patent Publication No. 1-179547 states that the upper end of a substantially U-shaped rear leg pipe is swingably supported by a connecting bracket in the vertical middle portion of a substantially rectangular frame-shaped front leg pipe. Moreover, the structure in which the seat plate is pivotally supported by the front leg pipe and the rear leg pipe is described. The folding chair described in Japanese Patent Publication No. 1-179547 can be folded into a flat plate shape by swinging the lower end of the rear leg pipe in a direction closer to the lower end of the front leg pipe when not in use. ..

Jitsuzenpei No. 1-179547

An object of the present invention is to realize a folding frame having a structure different from the conventional structure, which can be folded into a substantially flat plate shape, and a folding chair.

The folding frame of the present invention is
A pair of front strut members that extend in the vertical direction and are arranged apart from each other in the left-right direction.
A front beam member having both left and right ends supported and fixed to the pair of front beam members, and a front beam member.
A pair of rear strut members that extend in the vertical direction and are arranged apart from each other in the left-right direction.
A rear beam member having both left and right ends supported and fixed to the pair of rear strut members, and a rear beam member.
Each was rotatably connected to a front connecting portion rotatably connected to any of the front stanchion members of the pair of front stanchion members and to any of the rear stanchion members of the pair of rear stanchion members. A pair of side members with a rear connecting part,
To prepare for.

In the folding frame of the present invention, the pair of side members are rotated with respect to the pair of front beam members and the pair of rear column members, so that the front beam member and the rear beam member can be viewed in a plan view. One of them, one of the pair of side members, the other of the front beam member and the rear beam member, and the other side member of the pair of side members. It can be folded into a flat plate so that it is lined up in order.

In the folding frame of the present invention, the front strut member and the rear strut member of the pair of front strut members and the pair of rear strut members located on the same side in the left-right direction are the front strut member and the rear strut member. The distance in the direction orthogonal to the member may be larger than one of the distance between the pair of front strut members and the distance between the pair of rear strut members, and smaller than the distance between the other. ..

Each side member of the pair of side members can be curved or bent so that the front-rear intermediate portion is located outside the front-rear end portion in the left-right direction. Specifically, each side member of the pair of side members can be curved in an arc shape or bent into a substantially U-shape (substantially U-shaped).

The folding chair of the present invention includes a folding frame and a seat plate.
The folding frame is configured by the folding frame of the present invention, and
One end of the front end and the rear end of the seat plate is swingably supported by one of the front beam member and the rear beam member, and is supported by the seat plate. The other end of the front end and the rear end can be placed on the other member of the front beam member and the rear beam member.

In the folding chair of the present invention, the front connecting portion of each side member of the pair of side members is rotatably connected to the upper end portion of any of the front strut members of the pair of front strut members. Moreover, the rear connecting portion of each side member of the pair of side members is rotatably connected to the upper end portion of any of the rear strut members of the pair of rear strut members, and the respective sides thereof. The square member may have a side beam portion that connects the upper end portion of the front connecting portion and the upper end portion of the rear connecting portion and is inclined in an upward direction toward the rear.

In the folding chair of the present invention, in the pair of side members, the front connecting portion is rotatably connected to the upper end portion of the front strut member, and the rear connecting portion is the rear strut member. A pair of upper side members rotatably connected to the upper end portion and the front side connecting portion are rotatably connected to the lower end portion of the front strut member, and the rear side connecting portion is the said. It is composed of a pair of lower side members rotatably connected to the lower end of the rear strut member, and each upper side member of the pair of upper side members is the front connecting portion. It is possible to have a lateral beam portion that connects the upper end portion and the upper end portion of the rear connecting portion and is inclined in the upward direction toward the rear.

The folding chair of the present invention can further include a backrest portion that is stretched between the pair of rear strut members.

The folding frame and folding chair of the present invention configured as described above can be folded into a substantially flat plate shape when not in use, unlike the conventional ones and by a simpler operation.

FIG. 1 is a perspective view showing a folding chair according to an example of the embodiment of the present invention. FIG. 2 is a perspective view showing a folding chair according to an example of the embodiment of the present invention as viewed from a different angle from that of FIG. FIG. 3 is a perspective view showing a folding chair according to an example of the embodiment of the present invention in a folded state. FIG. 4 is a perspective view showing a state in which the folding chair according to an example of the embodiment of the present invention is folded and viewed from the direction opposite to that of FIG. 3 in the front-rear direction. FIG. 5 is a perspective view showing a state in which the folding chair according to an example of the embodiment of the present invention is being folded. 6 (A) to 6 (E) are plan views schematically showing a procedure for folding a folding chair according to an example of the embodiment of the present invention.

An example of the embodiment of the present invention will be described with reference to FIGS. 1 to 6 (E). In this example, the folding frame is applied to a folding chair. The folding chair 1 of this example includes a folding frame 2, a seat plate 3, and a backrest portion 4.

Each folding frame 2 is configured by cutting a pipe material made of a metal material such as an iron-based alloy or a light alloy to a predetermined length and combining a plurality of parts that have been bent as necessary. To. The folding frame 2 of this example has a pair of front strut members 5a and 5b, a front beam member 6, a pair of rear strut members 7a and 7b, and a pair of rear beam members 8a and 8b, respectively, on the upper side of each pair. It includes square members 9a and 9b and lower side members 10a and 10b.

The pair of front strut members 5a and 5b extend in the vertical direction and are arranged apart from each other in the left-right direction. In this example, each of the pair of front support support members 5a and 5b is configured to be linear.

The left and right ends of the front beam member 6 are coupled and fixed to a pair of front strut members 5a and 5b. Specifically, the front beam member 6 is formed in a straight line, and the left and right ends of the front beam member 6 are joined and fixed to the upper portions of the pair of front strut members 5a and 5b by welding, screwing, or the like. Has been done.

The pair of rear strut members 7a and 7b extend behind the pair of front strut members 5a and 5b in the vertical direction and are spaced apart from each other in the left-right direction. In this example, each of the pair of rear strut members 7a and 7b is configured to be linear.

In this example, the rear beam member is composed of a pair of rear beam members 8a and 8b arranged in parallel with each other separated in the vertical direction. The left and right ends of the pair of rear beam members 8a and 8b are coupled and fixed to the pair of rear strut members 7a and 7b. In this example, each of the pair of rear beam members 8a and 8b is configured in an arc shape in which the intermediate portion in the left-right direction is curved so as to be convex to the front side. Of the pair of rear beam members 8a and 8b, the upper rear beam member 8a has the same height position in the vertical direction as the front beam member 6, and the left and right ends of the upper rear beam member 8a are a pair. It is joined and fixed to the upper portions of the rear column members 7a and 7b by welding, screwing, or the like. The left and right ends of the lower rear beam member 8b are joined and fixed to the lower portions of the pair of rear strut members 7a and 7b by welding, screwing, or the like.

In this example, the pair of side members is composed of a pair of upper side members 9a and 9b arranged on the upper side and a pair of lower side members 10a and 10b arranged on the lower side. .. The pair of upper side members 9a and 9b are formed by bending and molding the pipe material into a substantially U shape, respectively, and the side beam portions 11a and 11b, the front connecting portions 12a and 12b, and the rear connecting portions 13a, respectively. 13b and the like.

The side beam portions 11a and 11b are configured in an arc shape, which is inclined in the upward direction toward the rear and curved so that the middle portion in the front-rear direction is convex outward with respect to the left-right direction.

The front connecting portions 12a and 12b are bent downward at right angles from the front end portions of the side beam portions 11a and 11b, and the lower end portions of the front connecting portions 12a and 12b are rotatable to the upper end portions of the front strut members 5a and 5b, respectively. Is linked to.

The rear connecting portions 13a and 13b are bent downward at right angles from the rear end portions of the side beam portions 11a and 11b, and the lower ends of the rear connecting portions 13a and 13b are at the upper ends of the rear strut members 7a and 7b, respectively. It is rotatably connected.

The pair of lower side members 10a and 10b are formed by bending the pipe material into a substantially U shape, respectively, and have legs 14a and 14b, front connecting portions 15a and 15b, and rear connecting portions 16a and 16b, respectively. And prepare.

The legs 14a and 14b are formed in an arc shape in which the middle portion in the front-rear direction is curved so as to be convex outward in the left-right direction.

The front connecting portions 15a and 15b are bent upward at right angles from the front ends of the legs 14a and 14b, and the upper ends of the front connecting portions 15a and 15b are rotatably connected to the lower ends of the front strut members 5a and 5b, respectively. Has been done.

The rear connecting portions 16a and 16b are bent upward at right angles from the rear end portions of the legs 14a and 14b, and the upper ends of the rear connecting portions 16 and 16b rotate to the lower ends of the rear strut members 7a and 7b, respectively. It is connected as possible.

The conventional structure can be applied to the structure for rotatably connecting the two members, such as a structure using a pivot bridged between the two members, a structure using bolts and nuts, and others. Known structures are applicable.

The pair of front strut members 5a and 5b and the pair of rear strut members 7a and 7b form a folding chair 1 (folding frame 2) in a substantially flat plate shape as shown in FIGS. 3, 4 and 6 (E). The positional relationship is regulated so that it can be folded into. Specifically, the distance W between the front strut members 5a and 5b and the rear strut members 7a and 7b located on the same side in the left-right direction in the direction orthogonal to the front strut members 5a and 5b and the rear strut members 7a and 7b. _S is made larger than the distance _WR between the pair of rear strut members 7a and _7b and smaller than the distance WF between the pair of front strut members 5a and 5b ( _WR < _WS < _WF ). Therefore, the folding frame 2 has a substantially trapezoidal planar shape when viewed from the vertical direction. With this configuration, the pair of side members (upper side members 9a, 9b, lower side members 10a, 10b) are rotated with respect to the front strut members 5a, 5b, whereby the front beam member is viewed in a plan view. 6. One side member (upper side member 9b, lower side member 10b), a pair of rear beam members (8a, 8b), and the other side member (upper side member 9a, lower side). The front beam member 6, the other side member (upper side member 9a, lower side member 10a), and the pair of rear beam members (8a, 8b) are arranged in the order of the square members 10a) or in a plan view. ), And one side member (upper side member 9b, lower side member 10b) can be folded in a flat plate shape so as to be arranged in this order. Alternatively, the interval _WS can be made smaller than the interval _WR and larger than the interval _WF ( _WF < _WS < _WR ).

The seat plate 3 is formed in a substantially rectangular flat plate shape, the front end portion of the seat plate 3 is swingably supported and fixed to the front beam member 6, and the rear end portion of the seat plate 3 is the upper rear portion. It can be placed on the beam member 8a. In this example, the seat plate 3 has an engaging portion 17 that can be engaged with the upper rear beam member 8a at the rear end portion of the lower surface. The engaging portion 17 may be omitted.

The backrest portion 4 is spread between the upper end portions of the rear strut members 7a and 7b and between the rear connecting portions 13a and 13b of the upper side members 9a and 9b. In this example, the backrest portion 4 is made of a flexible cloth. However, the backrest portion may be made of a plate material, a plurality of string-shaped members, or the like.

The folding chair 1 (folding frame 2) of this example can be folded into a substantially flat plate shape when not in use. In particular, the folding chair 1 of this example has a folding structure different from the folding structure of the folding chair described in Japanese Patent Publication No. 1-179547 . Hereinafter, an example of a procedure for folding the folding chair 1 will be described.

First, the engaging portion 17 of the seat plate 3 and the upper rear beam member 8a are disengaged, and as shown in FIGS. 6 (A) → 6 (B), the seat plate 3 is attached to the front beam member 6. Swing upward around the support part with respect to.

Next, as shown in FIG. 6 (B) → FIG. 6 (C) → FIG. 6 (D) → FIG. 6 (E), the upper side members 9a and 9b and the lower side members 10a and 10b are attached to the front columns. The folding frame 2 is folded by rotating the members 5a and 5b and the rear support members 7a and 7b.

Specifically, first, as shown in FIG. 6 (B) → FIG. 6 (C), the angle between the left upper side member 9a and the lower side member 10a with the front beam member 6 becomes smaller. In addition to rotating in the direction, the upper side member 9b and the lower side member 10b on the right side are rotated in a direction in which the angle formed with the front beam member 6 increases. As a result, as shown in FIG. 6C, the pair of rear strut members 7a and 7b and the front strut member 5b on the right side are arranged on or near the same straight line when viewed from the vertical direction.

Next, as shown in FIG. 6 (C) → FIG. 6 (D) → FIG. 6 (E), the angle between the left upper side member 9a and the lower side member 10a with the front beam member 6 is small. Further, the upper side member 9b and the lower side member 10b on the right side are rotated in a direction in which the angle formed with the front beam member 6 becomes smaller. As a result, the folding frame 2 is folded into a substantially flat plate shape.

On the other hand, when using the folding chair 1, first, as shown in FIG. 6 (E) → FIG. 6 (D) → FIG. 6 (C) → FIG. 6 (B), the upper side members 9a, 9b and The lower side members 10a and 10b are rotated with respect to the front support members 5a and 5b and the rear support members 7a and 7b to unfold the folding frame 2.

Specifically, first, as shown in FIGS. 6 (E) → 6 (D) → FIG. 6 (C), the left upper side member 9a and the lower side member 10a are referred to as the front beam member 6. The upper side member 9b and the lower side member 10b on the right side are rotated in a direction in which the angle formed by the front beam member 6 is increased. As a result, as shown in FIG. 6C, the pair of rear strut members 7a and 7b and the front strut member 5b on the right side are arranged on or near the same straight line when viewed from the vertical direction.

Next, as shown in FIG. 6C → FIG. 6B, the left upper side member 9a and the lower side member 10a are further rotated in a direction in which the angle formed with the front beam member 6 increases. At the same time, the upper side member 9b and the lower side member 10b on the right side are rotated in a direction in which the angle formed with the front beam member 6 becomes smaller.

Then, the seat plate 3 is swung downward about the support portion for the front beam member 6, and the engaging portion 17 is engaged with the upper rear beam member 8a. As a result, the folding chair 1 is assembled in a used state.

The folding procedure and the assembling procedure of the folding chair 1 (folding frame 2) are not limited to the above-mentioned procedures and may be any procedure as long as there is no contradiction.

In this example, the positional relationship between the front strut members 5a and 5b and the rear strut members 7a and 7b is restricted, and the upper side members 9a and 9b and the lower side members 10a and 10b are curved in an arc shape. By making it, a structure that can be folded into a substantially flat plate is realized. However, in the folding frame of the present invention, the front strut member and the rear strut member can be folded as long as they can be folded into a substantially flat plate shape by preventing the members from interfering with each other and not being able to rotate sufficiently. The positional relationship and the shape of the side member can be arbitrary. Specifically, for example, the lateral members can be curved or bent into a substantially U-shape or a substantially V-shape.

In the usage state of the folding chair 1 of this example, the user can use the upper side members 9a and 9b provided so as to span the upper ends of the front support members 5a and 5b and the upper ends of the rear support members 7a and 7b. Elbows can be placed on the side beam portions 11a and 11b. In short, the side beam portions 11a and 11b function as elbow rests.

The folding frame of the present invention is not limited to a folding chair, and can be applied to, for example, furniture such as a folding table, leg structures of outdoor equipment such as a bonfire, and a main body portion. Further, in the folding frame of the present invention, the shape, size, constituent material, etc. of the constituent members are appropriately selected according to the intended use, and thus the contents are limited to those shown in the above example of the folding chair. Will not be done.

1 Folding chair 2 Folding frame 3 Seat plate 4 Backrest 5a, 5b Front strut member 6 Front beam member 7a, 7b Rear strut member 8a, 8b Rear beam member 9a, 9b Upper side member 10a, 10b Lower side member 11a , 11b Side beam part 12a, 12b Front side connection part 13a, 13b Rear side connection part 14a, 14b Leg part 15a, 15b Front side connection part 16a, 16b Rear side connection part 17 Engagement part

Claims (6)

A pair of front strut members that extend in the vertical direction and are arranged apart from each other in the left-right direction.
A front beam member having both left and right ends supported and fixed to the pair of front beam members, and a front beam member.
A pair of rear strut members that extend in the vertical direction and are arranged apart from each other in the left-right direction.
A rear beam member having both left and right ends supported and fixed to the pair of rear strut members, and a rear beam member.
Each was rotatably connected to a front connecting portion rotatably connected to any of the front stanchion members of the pair of front stanchion members and to any of the rear stanchion members of the pair of rear stanchion members. A pair of side members with a rear connecting part,
Equipped with
The distance between the front strut member and the rear strut member located on the same side in the left-right direction of the pair of front strut members and the pair of rear strut members in the direction orthogonal to the front strut member and the rear strut member. Is larger than one of the distance between the pair of front strut members and the distance between the pair of rear strut members, and smaller than the distance between the other.
Each side member of the pair of side members is curved or bent so that the middle portion in the front-rear direction is located outside in the left-right direction with respect to both ends in the front-rear direction.
By rotating the pair of side members with respect to the pair of front beam members and the pair of rear column members, one of the front beam member and the rear beam member, the pair of the rear beam members, in a plan view. A flat plate so that one side member of the side members, the other of the front beam member and the rear beam member, and the other side member of the pair of side members are arranged in this order. Can be folded into,
Folding frame. The folding frame according to claim 1, wherein each side member of the pair of side members is curved in an arc shape. Equipped with a folding frame and a seat plate,
The folding frame is composed of the folding frame according to claim 1 or 2 , and is composed of the folding frame.
One end of the front end and the rear end of the seat plate is swingably supported by one of the front beam member and the rear beam member, and is supported by the seat plate. A folding chair in which the other end of the front end and the rear end can be placed on the other member of the front beam member and the rear beam member. The front connecting portion of each side member of the pair of side members is rotatably connected to the upper end portion of any of the front strut members of the pair of front strut members, and the pair of lateral members. The rear connecting portion of each side member of the member is rotatably connected to the upper end portion of any of the rear strut members of the pair of rear strut members, and the respective side members are connected to the front side. The folding chair according to claim 3 , further comprising a side beam portion that connects the upper end portion of the portion and the upper end portion of the rear connecting portion and is inclined upward toward the rear. In the pair of side members, the front connecting portion is rotatably connected to the upper end portion of the front strut member, and the rear connecting portion is rotatably connected to the upper end portion of the rear strut member. The pair of upper side members connected and the front connecting portion are rotatably connected to the lower end portion of the front strut member, and the rear connecting portion is connected to the lower end portion of the rear strut member. It is composed of a pair of lower side members rotatably connected, and each upper side member of the pair of upper side members is connected to the upper end of the front connecting portion. The folding chair according to claim 3 , further comprising a side beam portion that is connected to the upper end portion of the portion and is inclined upward toward the rear. Further provided with a backrest portion spanned between the pair of rear strut members.
The folding chair according to any one of claims 3 to 5 .

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