JPH0432991Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a connection of the upper part of the intermediate leg in a folding chair, in which both seat frame pipes on both sides are foldably connected to the upper part of the intermediate leg that stands up on the floor. Regarding structure.

[Conventional technology]

Conventionally, in a folding chair, the ends of both seat frame pipes on both sides are rotatably pivoted to the upper side of the middle leg that stands up on the floor.
As shown in Fig. 8, the upper part of the intermediate leg 1 was bent and crimped to the steel plate 7 at two places, and the ends of the double seat frame pipes 2 and 3 were bent and pivotally attached to both sides of the steel plate 7 with rivets. Therefore, in the riveted structure, a clearance is required between the rivet and the rivet through hole during assembly, and the clearance is concentrated at four locations, resulting in large backlash.In addition, the ends of the bent steel plate 7 on both sides are sharp. The structure had become protruding and dangerous.

[Problem that the invention attempts to solve]

The present invention solves such problems, and it can be unfolded and used stably without causing rattling, and it can be folded well without becoming dangerous, and it can be safely used. The present invention provides a compact structure that can be easily handled and increases commercial value, so that it can be conveniently implemented.

[Means for solving problems]

Therefore, in the present invention, a flat plate part is erected in the middle of the upper part of the support plate connected to the upper part of the intermediate leg, and low convex parts are integrally formed in the central parts of both sides of the flat plate part. Both connecting plates that are connected to the ends of the frame pipe and can be joined to the flat plate part are each formed with a recess that can fit into the convex part, and the ends of both connecting plates are attached to the lower part of both convex parts, respectively. It is constructed by pivoting.

[Effect]

Therefore, when the legs are opened, both connecting plates are joined to both sides of the flat plate part of the support, and the recesses of both connecting plates are fitted into the convex parts on both sides of the flat plate part, so that the intermediate leg The seat is pushed evenly by the load bearing frame pipes on both sides, allowing it to stand up in a stable manner, creating a stable open leg position without wobbling, and allowing it to be folded easily. .

〔Example〕

Next, the embodiment shown in the drawings will be described. FIG. 2 shows a perspective view of the folding chair with the legs open, and a large number of horizontal beams 8 are installed between the seat frame pipes 2 and 2 on both sides of the seat portion on the foot side.
A large number of horizontal beams 8 are also constructed between the seat frame pipes 3 and 3 on both sides of the intermediate seat, and the pipes 2 and 3 are connected to an intermediate leg 1 that can stand up between them, so that the pipes 2 and 3 can be folded in the same way as in the conventional type. It is configured so that it can be done.

A is a support metal, with a flat plate part 4 erected in the middle of its upper part, and low protrusions 5a and 5b in the orthogonal direction are connected and integrally formed in the center of both sides of the flat plate part 4. Holes 10a and 10b into which the spring pin 9 can be fitted are formed in the lower parts of the protrusions 5a and 5b, respectively, and the protrusion 11 formed at the lower part of the support A is fitted into the upper part of the intermediate leg 1 and engaged. It is configured so that a stop pin 12 can be inserted therein.

Reference numerals B and C denote connecting plates, which are formed so as to be able to be joined to both sides of the flat plate part 4, and are made slightly longer than that. Recesses 6a and 6b into which the parts 5a and 5b can be fitted are formed, respectively, and holes 1 into which the spring pins 9 can be fitted are formed at the ends of the connecting plates B and C.
3a and 13b, respectively, and both connecting plates B and C
Projections 14a and 14b projecting perpendicularly from the seat frame pipes 2 and 3 are fitted into the ends of the seat frame pipes 2 and 3, respectively, and locking pins 15 and 15 are installed so that they can be inserted therein.

Therefore, when the legs are opened, the connecting plates B and C on the seat frame pipes 2 and 3, which rotate around the spring pins 9 and 9, as shown in FIGS.
The legs are opened by abutting against both sides of the flat plate part 4 on the upper part of the intermediate leg 1, and when in use, the first
As shown in the figure, when a force is applied from above to below, both connecting plates B and C push against the flat plate part 4 with the same force from opposite sides, forcing the intermediate leg 1 to stand upright. , and the concave portions 6a, 6b and the convex portion 5
By fitting each of a and 5b, the open leg state is maintained without any play.

When folding, use both frame pipes 2 and 3.
Insert the spring pin 9 in the direction of arrows A and B, respectively.
9, it can be folded as shown in FIG. 7, and in that state there is no dangerous protrusion.

[Effect of idea]

In this way, the present invention connects the connecting plates B and C to the flat plate part 4.
Since the legs can be opened by abutting both sides of the intermediate leg 1 and fitting the concave portions 6a and 6b into the convex portions 5a and 5b, the legs can be opened while keeping the intermediate leg 1 upright and without any wobbling. It can be folded well without any dangerous protrusions and can be handled safely, and has a compact structure that increases commercial value and can be suitably implemented.

[Brief explanation of the drawing]

Figure 1 is a side view of the main parts of an embodiment of the present invention;
Figure 2 is a perspective view of the folding chair, Figure 3 is a perspective view of the folding chair.
The exploded view of the figure, Figures 4 and 5 are - of Figure 3.
6 is a partial perspective view of FIG. 3, FIG. 7 is an explanatory view of the operation of FIG. 1, and FIG. 8 is a conventional example. 1... Intermediate leg, 2, 3... Seat frame pipe,
A... Support metal, 4... Flat plate part, 5a, 5b... Convex part, B, C... Connecting plate, 6a, 6b... Concave part.

Claims (1)

[Scope of utility model registration request] In a folding chair configured by rotatably pivoting the ends of both seat frame pipes 2 and 3 on the upper side of an intermediate leg 1 that stands on the floor,
A flat plate part 4 is erected at the middle of the upper part of the support A which is connected to the upper part of the intermediate leg 1, and the flat plate part 4
Both connecting plates B and C are integrally formed with low convex portions 5a and 5b in the central portions of both sides, respectively, and are connected to the ends of the two-seat frame pipes 2 and 3, respectively, and can be joined to the flat plate portion 4. While forming recesses 6a and 6b that can fit into the projections 5a and 5b, respectively,
A connecting structure for an upper part of an intermediate leg, characterized in that the ends of both connecting plates B and C are pivotally connected to the lower parts of both convex parts 5a and 5b, respectively.