JPH0657247U - Leg support for folding chairs - Google Patents

Abstract

(57) [Abstract] [Purpose] Legs for a folding chair that can disperse the force exerted on the shaft hole and the connecting means by the load of the weight of a person and the like, and can obtain a folding chair with excellent durability. It is intended to provide a support. A shaft having a short jaw, a connecting hole formed therein, a coupling projection for receiving and fixing an end portion of a seat plate and provided on a support plate, and pivotably locking an upper end portion of a leg. In a leg support tool in which a plurality of connecting pieces having holes are erected in a wall shape on the back surface of the supporting plate, the supporting plate is a groove facing the upper end of the leg between the connecting plates. And a reinforcing piece having a shaft hole formed in a portion corresponding to the shaft hole is integrally provided on the back surface of the support plate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a leg support for a folding chair.

[0002]

[Prior art]

 Generally, a folding chair has been devised that allows legs to be folded and is easy to carry and store. These require leg supports that support legs and connect with each other, and a large number of leg supports have been devised depending on the chair form and purpose of use.

As an example of this leg support, there is a leg support for a folding chair previously proposed by the present applicant (see Utility Model Publication No. 92-2673 of the Republic of Korea). In this leg support, a protrusion having a connecting hole is formed on a supporting disc, and two leg connecting pieces having a shaft hole on the back side of the supporting disc are formed in different directions. . Then, the extension is integrally formed on the upper side of the leg connecting piece facing in one direction, and the upper end of the leg connecting piece facing in the other direction is integrally connected with the upper end of the protrusion to form a protective portion. There is.

[0004]

[Problems to be solved by the device]

 According to the leg support having the above structure, by preventing the connection means between the leg support and the leg from being exposed to the outside, the leg support is expected to improve the drawback of impairing the overall appearance of the folding chair. Although the objective was achieved, the leg is designed to be rotatably supported by inserting the connecting means (bolt or rivet, etc.) into the shaft hole of the leg connecting piece so that the leg can pivot about the connecting means. When using a chair, the weight of the person is directly transmitted to the axial hole of the leg support (the hole into which the above-mentioned connecting means is inserted), where stress concentration occurs (Stress Concentration), and the above-mentioned connecting piece The peripheral portion of the shaft hole expands or breaks. Also, the life of the legs becomes shorter as the legs move more and more. Moreover, since shearing stress is likely to occur between the leg and the connecting piece, the connecting structure has a drawback that the connecting means is easily bent.

The present invention was created in order to solve various problems of the above-mentioned conventional techniques. The purpose of the present invention is to extend the weight of a person, such as a person's weight, when the chair is deployed with the legs extended. It is an object of the present invention to provide a leg support for a folding chair that can disperse the force exerted on the shaft hole and the connecting means by the weight and can obtain a folding chair with excellent durability.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the leg support for a folding chair according to the present invention has a coupling protrusion formed on the support plate, which has a short jaw, is provided with a connecting hole, and receives and fixes the end of the seat plate. And a plurality of connecting pieces having shaft holes for rotatably pivoting the upper ends of the legs, which are provided on the back surface of the supporting plate in a wall shape. The plate has a groove formed between each connecting piece and the upper end of the leg so that the upper end of the leg faces the reinforcing piece having an axial hole formed at a portion corresponding to the axial hole. The configuration is provided.

Further, it is preferable that the grooves formed between the plurality of connecting pieces and the reinforcing pieces are formed so as to form a predetermined angle with each other. Further, it is preferable that a support jaw having a downwardly inclined surface is formed at the end of the groove. Further, it is preferable that the second replenishing piece is formed outside the reinforcing piece.

[0008]

[Action]

 According to the above-mentioned structure, it is achieved by a leg supporting tool integrally formed with a connecting projection formed with a connecting hole to be inserted and connected to a connecting hole formed by a sewn tool of a woven fabric for making a plate.

[0009]

【Example】

 Hereinafter, the structure of the present invention will be described in more detail with reference to the accompanying drawings. 1 to 5 are preferred embodiments of the leg support (1) of the present invention, which is applied to a folding chair in which the seat (B) has a triangular shape. On the supporting plate (2), a connecting protrusion (3) having a connecting hole (4) having a short jaw (5) is formed to be integrally formed.

Connecting pieces (6) and (61) are formed on the back side of the support plate (2), and reinforcing pieces (7) are formed outside the connecting pieces (6) and (61). Between the reinforcing piece (7) and the connecting pieces (6) and (61) are formed grooves (8) and (8) having a width into which the upper ends of the legs (C) described later fit. A connecting shaft hole (9) is bored in the corresponding portions of the connecting pieces (6) (61) and the reinforcing piece (7).

A supporting jaw (10) having a downward inclined surface (11) formed at both ends of the groove (8) is provided on the inner shafts of the connecting pieces (6) (61) and the reinforcing piece (7). It was formed. Further, the angle formed between the two grooves (8) and (8) is formed in accordance with the installation angle of the leg (C). In the drawing, (12) is a final processed long groove for material saving and appearance, (13) is a fixing tool, (14) is an elastic locker of the fixing tool (13), (A) is a folding chair, (15) ) Is a woven fabric for forming the seat board (B), (16) is an eyelet (Eyelet) and a stitched portion of the woven fabric (B), (17) is a coupling hole, and (18) is a connecting means.

According to the present invention thus constructed, the eyelet (16) of the woven cloth (15) that constitutes the seat plate (B) when the folding chair (A) is assembled as shown in FIGS. 4 and 5. The fixing locker (12) is inserted into the connecting hole (4) with the connecting protrusion (3) inserted in the connecting hole (17) of the elastic locker (9). 14) hooks on the short jaw (5) of the connecting hole (4) to fixably connect the seat plate (B).

Then, the leg (C) is inserted into the groove (8) between the reinforcing plate (7) formed at the bottom of the support plate (2) of the leg support (1) and the connecting pieces (6) (61). top end by inserting a (C ₁₎ of), consolidated unit (18) i.e., normal fixing bolts, nuts, connecting shaft hole in the reinforcing piece by rivets or the like (7) and the connecting piece (6) (61) ( 9) The shaft is attached and the assembly is completed.

The connection at the bottom of the leg (C) pivotally attached to the leg support (1) is based on the utility model publication No. 92-2673 “Leg support for folding chairs” filed earlier by the applicant. It is possible if you use "ingredients". In the leg (C), the leg body (C ₂ ) is formed separately from the upper end (C ₁ ), and the upper end (C ₁ ) is press-fitted into the upper end (C ₁ ). It has become integrated with.

The details of the technical contents of the present invention when the legs (C) of the folding chair (A) thus assembled are unfolded and used are as follows. That is, when the connecting means (18) of each leg (C) is rotated and deployed, the supporting jaw (10) of the leg support is caught by the downward inclined surface (11) and stopped, and the leg support is connected. When the seat (B) is unfolded at the same time as being joined to the protrusion (3) by the fixture (13), the folding chair (A) can be used.

When a person sits on the seat plate (B) of the folding chair (A) in this state, it is transmitted to the leg support (1) of the present invention connected to the seat plate (B). . The load at this time is connected to the groove (8) between the reinforcing piece (7) protruding from the supporting plate (2) of the leg support (1) and the connecting piece (6) (61), and the connecting means (18). It extends to each leg (C) that is pivotally attached by, and its load is most particularly applied to the supporting jaw (10) that acts as a fulcrum of the lever and the connecting means (18) connected by the connecting shaft hole (9). It will become strong. Then, the exerted force is dispersed to the supporting jaw (10) of the leg support (1), the reinforcing piece (7), and the connecting pieces (6, 61), so that the force is totally dispersed and the stress concentration is achieved. Is minimized to the utmost, which contributes to the extension of the life of the folding chair (A) as the life of the leg support (1) is extended.

On the other hand, FIGS. 6 to 10 show another embodiment of the present invention. As shown in FIG. 6, in this embodiment, the seating board (B) for making the folding chair (A) can be formed in a square shape. The supporting plate (2) similar to the preferred embodiment of the present invention shown in FIGS. 1 to 5 has a right angle shape. Then, two-directional connecting pieces (62) (63) and reinforcing pieces (71) (72) are formed adjacent to the portion of the coupling protrusion (3) protruding to the back surface side of the support plate (2). .

Further, the grooves (81) and (82) form a predetermined angle between the connecting piece (62) and the reinforcing piece (71) and between the connecting piece (63) and the reinforcing piece (72). It is shaped to maintain. Further, one end of the reinforcing piece (72) is extended, and the extending portion (72a) is arranged in parallel with the other reinforcing piece (71) at a predetermined interval, and the extending portion (72a) is also arranged. A connecting shaft hole (9) is provided, and as shown in FIG. 8, the connecting means (18) is connected to the connecting piece (62), the reinforcing piece (71) and the shaft hole (9), (9) of the extension portion (72a). (9) was inserted and supported. That is, the extension portion (72a) is provided as the second reinforcing piece.

Therefore, in the above-mentioned embodiment, since the reinforcing piece (71) and the extension portion (72a) are doubly formed, the reinforcing force of the entire leg support (1) can be reliably provided. 10 to 12 show still another embodiment of the present invention. The leg support (1) of this embodiment is a support plate (2) suitable for application to a folding chair (A) in which the seat plate (B) has a relatively large corner. Has been formed.

A part of the coupling projection (3) is projected on the back surface of the support plate (2), and a circular reinforcing piece (73) is formed so as to surround the projection. One end of the reinforcing pieces (74) (75) is integrally formed with the circular reinforcing piece (73), and the connecting pieces (64) (65) are provided in parallel with the reinforcing pieces (74) (75). Grooves (83) and (84) are formed between the connecting piece (74) and the connecting piece (64) and between the reinforcing piece (75) and the connecting piece (65), respectively.

A second reinforcing piece (75a) separately prepared is formed outside the reinforcing piece (75) integrally with the circular reinforcing piece (73). In such an embodiment, the leg (C) is connected to each groove (83) (84) by the connecting means (18) and the reinforcing pieces (74) (75) (75a) and the connecting pieces (64) (65) are connected to each other. The effect can be obtained by axially mounting it in the connecting shaft hole (9) and using it as in the above-mentioned one embodiment.

Particularly, in the embodiment of the present invention, the connecting hole formed by the eyelet (16) of the seat plate (B) is inserted into the connecting protrusion (3), and the connecting protrusion (3) is formed. The fixing tool (13) is inserted into the connecting hole (4) and can be easily tightened at the end of the connecting hole (4) with the elastic rocker (14) of the fixing tool (13). The force exerted on is not directly exerted on the fixture (13). That is, the stress concentration generated in the fixture (13) by being transmitted to the connecting protrusion (3) of the leg support (1) is dispersed in the leg support (1) to extend the life of the folding chair (A). Extensions can be provided.

[0023]

[Effect of device]

 Since the leg support according to the present invention is configured as described above, the force applied to the connecting means is received by the connecting piece and the reinforcing piece, and the shaft hole expands due to the load, and the connecting means bends. And the life of the folding chair can be extended.

[Brief description of drawings]

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

FIG. 2 is a bottom view of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a transverse cross-sectional view of FIG. 1 illustrating a combined state of legs.

5 is a use state diagram of FIG. 1. FIG.

FIG. 6 is a perspective view of another embodiment of the present invention.

FIG. 7 is a bottom view of FIG.

FIG. 8 is a cross-sectional view of FIG. 6 illustrating the coupled state of the legs.

9 is a use state diagram of FIG. 6. FIG.

FIG. 10 is a perspective view of another embodiment of the present invention.

11 is a bottom view of FIG.

FIG. 12 is a cross-sectional view of FIG. 10 illustrating the joined state of the legs.

13 is a use state diagram of FIG.

[Explanation of symbols]

 1 Leg Supporting Tool 2 Supporting Plate 3 Coupling Projection 6, 61, 62, 63, 64, 65 Coupling Piece 7, 71, 72, 73, 74, 75 Reinforcing Piece 8, 81, 82, 83, 84 Groove 10 Supporting Jaw

Claims (4)

[Scope of utility model registration request] 1. A coupling projection having a short jaw and having a connecting hole formed therein and receiving and fixing an end portion of a seat plate is provided on a support plate, and an upper end portion of a leg is rotatably fixed. In a leg support tool in which a plurality of connecting pieces having axial holes for standing upright in a wall shape on the back surface of the supporting plate, the supporting plate is such that the upper end portion of the upper leg of the leg is between the connecting pieces. A leg support for a folding chair, characterized in that reinforcing pieces each having a groove facing the shaft hole and a shaft hole formed at a portion corresponding to the shaft hole are integrally provided on the back surface of the support plate. 2. The leg support for a folding chair according to claim 1, wherein the grooves formed between the plurality of connecting pieces and the reinforcing pieces are formed so as to form a predetermined angle with each other. 3. The leg support for a folding chair according to claim 1, wherein a support jaw having a downwardly inclined surface is formed at a distal end portion of the groove. 4. The leg support for a folding chair according to claim 1, wherein a second replenishing piece is formed outside the reinforcing piece.