JP2001078839A - Leg folding structure for table and chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leg folding structure of a table and a chair capable of reducing the number of components, simplifying assembly and securing strength. SOLUTION: A member fixed to the lower surface 1b of the table 1 is provided with a vertical piece 6 having a lock groove 8 and a locking curved slope 9, the upper end parts of leg members 11A and 11B are turnably connected to the vertical piece 6 and arms 15 and 16 having a lock bar 14 are provided turnably through a spring 17 on the leg members 11A and 11B. Then, in the state of housing the leg members 11A and 11B, the lock bar 14 is engaged inside the lock grooves 8 and a folding state is held. At the time of detaching the lock bar 14 from the lock grooves 8 and turning the leg members 11A and 11B in an erecting direction, the lock grooves 14 are engaged with the locking curve slopes 9 and the leg members 11A and 11B are held in suspended state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a table and chair leg folding structure.

[0002]

2. Description of the Related Art Conventionally, in a folding structure of legs of a table or a chair, a frame pipe is provided on the lower surface of the table or chair, and the legs are foldably connected to the frame pipe via a link member. Conventionally, there is a problem that a frame pipe is required, the number of parts of the link member is increased, the assembling becomes troublesome, and the strength of the legs is not sufficient due to rattling.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has a table and chair leg folding structure which has a small number of parts, is easy to assemble, and has sufficient strength. The gist of the present invention is to provide a structure in which a leg member hanging on the lower surface of a table or chair can be horizontally folded toward the lower surface of the table or chair. The fixed member to be fixed is provided with a vertical piece in which a lock groove and a locking curved inclined surface are formed in a hanging shape, and the upper end of the leg member is rotatably connected to the vertical piece, An arm having a lock bar is rotatably provided on the leg member via a spring. When the leg member is in a horizontal state, the lock bar is engaged in the lock groove to be held in a folded state. Remove the lock rod from the groove and the leg member When rotated in the standing direction is that the locking curved oblique surface on the lock rod engaging leg member is configured to be held in suspended form.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the leg folding structure as viewed from the back side of the table. The components constituting the leg folding structure are composed of components as shown in the exploded views of FIG. 2 and FIG. First, the fixing member fixed to the table plate side will be described with reference to FIG. 2. The left fixing member 3 </ b> A and the right fixing member are spaced apart in the width direction on the longitudinal edge of the lower surface of the table plate 1. 3B is fixed in parallel, and the table plate 1 is formed by extruding a resin, for example, as shown in a perspective view of a main part in FIG.
A plurality of extrusion holes 1c are formed, and at least two or more of the extrusion holes 1c are reinforced by inserting reinforcing metal members 2 therein.
It is formed in a U-shaped cross section opened to the upper surface 1a side of the table plate 1, and rises integrally at right angles from the left and right sides of the back wall 2a abutting on the lower surface 1b side of the table plate 1, and the side walls 2b,
2c is formed.

Returning to FIG. 2, the description will be continued.
A and the right fixing member 3B each include a fixed horizontal piece 4 that abuts on the lower surface 1b of the table plate 1.
The vertical piece 6 is formed so as to be perpendicular to the vertical direction from the vertical direction, and the fixed horizontal piece 4 is formed with two bolt holes 4a, 4a along the longitudinal direction.
As shown in FIG. 1, bolts 5 are respectively inserted from the lower surface side into the a and 4a, and the bolts 5 are tightened to the back wall 2a of the reinforcing bracket 2 of the table plate 1, and the fixed horizontal piece 4 is fixed to the table plate. 1 is fixed to the lower surface 1b. A fulcrum pin hole 6a is formed in the vertical piece 6, and an arcuate fan-shaped curved surface 7 is formed on the outer periphery of the inner end. A lock groove 8 is formed so as to be inclined inward with an inclined surface 8a, and a guide horizontal piece 10 is provided horizontally from the lock groove 8 to the outer end side, and further vertically. Piece 6
Is formed with a locking curved inclined surface 9 which is curved inwardly and inwardly toward the lower surface 1b of the table plate 1.

Next, the other members will be described with reference to FIG. 4. The left leg member 11A and the right leg member 11B each have a pin hole 11a on the distal end side, and a pin hole 11b at an interval inside thereof. It is formed so as to penetrate in the lateral direction, and has a slit groove 11c formed in a notch shape on the lower surface side from the front end side. The respective pin holes 11a of the left and right leg members 11A, 11B.
, The fulcrum pin 12 can be inserted from the outside,
The fulcrum pin 12 is inserted into and fixed to the fulcrum pin holes 6a of the left and right fixing members 3A and 3B. In this case, the fan-shaped curved surfaces 7 of the vertical pieces 6 of the fixing members 3A and 3B respectively. Is fitted into each slit groove 11c, and as shown in FIG. 1, the portion of the fan-shaped curved surface 7 of the vertical piece 6 is arranged to protrude downward from the slit groove 11c. In this way, the left and right leg members 11A and 11B are rotatably connected to the left and right fixing members 3A and 3B by the fulcrum pin 12, respectively, and the left and right leg members 11A and 11B are respectively stored in the storage state with the fulcrum pin 12 as a fulcrum. From the horizontal position to the hanging position to be in the upright state.

A connecting pin 13 is inserted from the outside into a pin hole 11b of each of the left and right leg members 11A and 11B, and a spring 17 is disposed inside the connecting pin 13 and swings inside. Arms 15 and 16 are arranged, and connecting pins 13 are inserted into pin holes 15a and 16a at the tips of respective swing arms 15 and 16, so that swing arms 15 and 16 can swing. Connecting pin 1
3, one end of each spring 17 is inserted into a spring hole 11d formed in the leg member, and the other end of each spring 17 is a swing arm 15, The swing arms 15 and 16 are biased by the springs 17 toward the lower surface 1b of the table plate 1. The outer ends of the pair of swing arms 15 and 16 are connected by lock bars 14 extending in the horizontal direction, and both ends of the lock bars 14 are extended outward from the swing arms 15 and 16. I have.

In such a structure, the left and right leg members 1
1A and 11B are folded along the lower surface 1b of the table plate 1 to form a horizontal shape, and as shown in FIGS.
6, the lock rod 14 is fixed to the lock grooves 8,
In this state, each lock groove 8 is formed with an inclined surface 8a. Therefore, even if each leg member 11A, 11B is rotated in the upright direction in this state, the lock groove 8 is locked. The rod 14 is pressed against the inclined surface 8a in the lock groove 8, so that the left and right leg members 11A and 11B cannot be erected, and the leg members 11A and 11B are held in a stored state. In this folded state, the table 1
Each leg member 11A, 11B is arranged along the lower surface 1b of the fixing member, and the lowest is the guide horizontal piece 10 of the fixing member, which has a lower height projecting downward from the lower surface 1b than the conventional one, The folded state is compact, the stacking and storage of the plurality of table boards 1 in the folded state is easy, and a large number of table boards 1 can be folded and stored in a stacked storage space.
By covering the guide horizontal piece 10 or the fan-shaped curved surface 7 with a cover made of resin or the like, it is possible to prevent the table plates 1 from being damaged when many table plates 1 are folded and stored in a stacked state. Can be done.

From this stored state, the lock bar 14 is lifted up and removed from the lock groove 8, and when the left and right leg members 11A and 11B are rotated in the upright direction as shown in FIG. When the left and right leg members 11A and 11B are gradually rotated in the erecting direction and rise up while being in contact with the horizontal piece 10, the lock bar 14 is moved outward along the guide horizontal piece 10, and Eventually, the lock rod 14 is engaged with the locking curved inclined surface 9 and the lock rod 14 is tilted along the locking curved inclined surface 9 toward the lower surface 1b of the table 1 as shown in FIG. At this time, the lock rod 14 is
Is gradually moved to the lower surface 1b side so as to bite into the locking curved inclined surface 9 with the fulcrum as a fulcrum, and the left and right leg members 11A, 11B are brought into contact with the inner end surface 10a side of the guide horizontal piece 10,
The left and right leg members 11A and 11B are firmly held upright. In this state, the lock rod 14 is locked by the locking curved inclined surface 9.
The leg portions 11A and 11B can be firmly raised by absorbing backlash.

Conversely, when folding from the standing state, the lock rod 14 is released from the locking curved inclined surface 9, and in this state, the leg members 11A and 11B are rotated inward, whereby the lock rod The reference numeral 14 moves inward along the guide horizontal piece 10, and eventually the lock rod 14 is fitted into the lock groove 8 and locked in the stored state. In this case, since the vertical piece 6 is fitted in the slit groove 11c, the fingers are not packed, and the leg members 11A, 11
B can be opened and closed to perform the folding operation. Thus, in this example, since the link mechanism is not used unlike the conventional one, the number of parts is reduced, the assembly is easy, and the strength in the stored state and the upright state can be sufficiently secured. Become. In this example,
Since there is no frame pipe as in the related art, the table plate 1 is made to have a neat shape, and the foot can be easily put on the lower surface side. In the present embodiment, the leg folding structure of the table is illustrated, but a similar leg folding structure can be adopted for a chair.

[0011]

According to the present invention, there is provided a structure in which a leg member hanging on the lower surface of a table or chair can be horizontally folded toward the lower surface of the table or chair, and is fixed to the lower surface of the table or chair. The fixing member is provided with a vertical piece in which a locking groove and a locking curved inclined surface are formed in a hanging manner, and the upper end of the leg member is rotatably connected to the vertical piece. An arm having a lock rod is provided rotatably via a spring, and when the leg member is in a horizontal state, the lock rod is engaged in the lock groove and held in a folded state, When the lock member is removed and the leg member is rotated in the upright direction, the lock member is engaged with the locking curved inclined surface and the leg member is held in a drooping shape, so that the number of parts is reduced. Less, easy to assemble, legs stored and standing The strength of the table or chair can be secured sufficiently in each case, and the legs can be firmly fixed by locking the legs in each of the storage state and the standing state. The lower surface side can be formed in a neat space.

[Brief description of the drawings]

FIG. 1 is a perspective configuration diagram of a folded state viewed from a lower surface side of a table.

FIG. 2 is a perspective configuration diagram of a fixing member fixed to a table side.

FIG. 3 is an exploded perspective view showing a main part of the table plate, as viewed from an upper surface side.

FIG. 4 is an exploded perspective view of a component attached to the fixing member of FIG. 2;

FIG. 5 is an explanatory side view of a main part in a folded state.

FIG. 6 is a side view configuration diagram showing a state in which the leg member is rotated in the upright direction.

FIG. 7 is an explanatory side view showing a state in which the standing of the leg members is completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table board 1b Lower surface 1c Extrusion hole 2 Reinforcement metal 2a Back wall 3A Left fixing member 3B Right fixing member 4 Fixed horizontal piece 4a Bolt hole 5 Bolt 6 Vertical piece 6a Fulcrum pin hole 7 Fan-shaped curved surface 8 Lock groove 8a Inclined surface 9 Bending slope 10 Guide horizontal piece 10a End face 11A Left leg member 11B Right leg member 11c Slit groove 12 Support pin 13 Connecting pin 14 Lock rod 15, 16 Swing arm 15a, 16a Pin hole 17 Spring

Claims (1)

[Claims] 1. A fixing member fixed to a lower surface of a table or a chair, the leg member hanging on the lower surface of the table or a chair being horizontally foldable toward the lower surface of the table or the chair. , A vertical piece having a locking groove and a locking curved inclined surface is provided in a hanging manner, and the upper end portion of the leg member is rotatably connected to the vertical piece, and a lock is provided on the leg member. An arm having a rod is rotatably provided via a spring, and when the leg member is in a horizontal state, the lock rod is engaged in the lock groove and held in a folded state, and the lock rod is removed from the lock groove. A table or chair leg, wherein when the leg member is rotated in the upright direction, a lock bar is engaged with the locking curved inclined surface to hold the leg member in a hanging state. Folding structure.