JPH056820Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a folding chair that is easy to carry.

[Conventional technology]

Conventional general folding chairs have a back frame and a seat frame made by bending a pipe into a rectangular shape, which are connected to each other with a hinge, and a pair of left and right X-shaped retractable legs are attached to this seat frame. When not in use, the back frame and legs are folded along the seat frame.

[Problem that the invention attempts to solve]

With the folding chair mentioned above, even when folded,
It cannot be made smaller than the size of the seat frame, and because it is bulky, it is troublesome to carry, and it is not necessarily comfortable to sit on.

[Means for solving problems]

The present invention provides a folding chair in which foldable legs are arranged around the outer periphery of a support column so that the chair becomes cylindrical when folded.

That is, in the folding chair according to the present invention, the lower ends of the plurality of arms are pivotally attached to the upper part of the outer peripheral surface of the mounting tube fixed to the vertical center of the support column, and
Similarly, the upper ends of a plurality of leg rods are pivotally attached to the lower part, and a pair of upper and lower sliding rings that are movable in the vertical direction are fitted onto the pillars at the top and bottom of the mounting tube, and the lower sliding ring and the The inner and outer ends of the lower rotating rod are respectively pivotally connected to the lower ends of the leg rods, and the inner and outer ends of the upper rotating rod are respectively pivotally connected to the upper sliding ring and the arm. A seat body is provided across the upper end, and a stopper is provided for hooking the upper and lower sliding rings to the column, so that the arm and the leg rod can be folded by raising and lowering the upper and lower sliding rings. west,
When the lower sliding ring is further lowered to the lower limit,
It is characterized in that the lower ends of each leg rod and the lower surface of the support are brought into contact with the ground almost simultaneously.

〔Example〕

The present invention will be described in detail below based on an illustrated embodiment.

Reference numeral 1 denotes a cylindrical column whose upper and lower open ends are closed by fitting cover plates 2, 2 each having a flange 2a.

A cylindrical main body 3 is located at the center of the pillar 1 in the height direction.
A plurality of protruding pieces 3b (six pieces in the embodiment) facing in the radial direction and spaced at equal intervals along the outer circumferential surface of a.
The mounting cylinder 3 in which the is disposed is fitted and fixed.

Further, on the support column 1, a pair of upper and lower sliding bodies, for example, sliding rings 4 and 5, each having projecting pieces 4a and 5a extending in the radial direction on the outer circumferential surface, sandwich the mounting tube 3, and can be freely raised and lowered. is inserted into.

Reference numeral 6 denotes legs, the upper end of which is pivoted to the lower end of the protruding piece 3b of the mounting tube 3, and the lower end of which is inclined downward in the radial direction, six leg rods 6a; It consists of a lower rotating rod 6b which is pivotally attached to the lower end and whose inner end is pivotally attached to the protrusion 5a of the lower sliding ring 5.As the sliding ring 5 moves up and down, the leg rod 6a moves. , folding and expanding.

Reference numeral 7 denotes support arms, the lower end of which is pivoted to the upper end of the protruding piece 3b of the mounting tube 3, and the upper end 7c of which is inclined upward in the radial direction, including six arms 7a, and the outer end of which is connected to the arm 7a. and an upper rotating rod 7b whose inner end is pivotally connected to the protrusion 4a of the upper sliding ring 4, and when the sliding ring 4 is raised and lowered, the upper end of the arm 7a is The portion 7c can be expanded or folded.

8 is the seat body, which is made of almost regular hexagonal canvas material 8a.
A radial cylindrical portion 8b is formed on the back side of each corner of the arm 7.
The upper end portions 7c of the portions a are respectively inserted and secured with set screws 9.

Reference numeral 10 denotes a tension coil spring, the upper end of which is hooked to the intermediate portion of the arm 7a, and the lower end of which is hooked to the intermediate portion of the leg rod 6a.
and the leg rods 6a are always urged in the direction of expansion.

Reference numeral 11 denotes a toggle mechanism as a stopper for locking the sliding ring 4, and as shown in FIG. It consists of a handle rod 13 having a handle 13a at the top thereof, and a latch rod 14 whose lower end is pivoted to an ear piece 13b provided inside the upper part of the handle rod 13. It can be hooked to the lower end of the sliding ring 4.

15 is a stopper pin suspended from the lower sliding ring 5 with a chain 16;
5 into a horizontal hole 17 passing through the sliding ring 5 and the support column 1 in the radial direction, the legs 6 are locked in the expanded state.

Further, as shown in FIG. 5, the upper ends of six threads 18 (only one is shown) whose lower ends are fixed to the outer peripheral surface of the sliding ring 5 penetrate the seat body 8. and is fixed to a disc-shaped grip 19 provided on its upper surface.

It should be noted that when the lower sliding ring 5 is lowered to its lower limit, the lower ends of the respective leg rods 6a are brought into contact with the lower surface of the support column 1 almost simultaneously.

Note that 20 shown in FIG. 1 is a cylindrical case for storing a folded chair.

To use a folding chair like the one above, you need to
As shown in the figure, after the support arm 7 and leg 6 are expanded by the force of the tension coil spring 10, the upper sliding ring 4 is locked to the toggle mechanism 11, and the stopper pin 15 is attached to the support column 1. Insert into the horizontal hole 17 and fix the lower sliding ring 5.

Then, the seat body 8 unfolds as shown in Fig. 1, and one can sit on its upper surface. At this time, the bottom surface of the seat body 8, which is bent in a concave shape, abuts against the upper end surface of the support column 1 and receives the load. The entire load is mainly received by the bottom surface of the support column 1.

To store the folding chair, as shown in FIG. 5, the stopper pin 15 is removed, the grip 19 is pulled upward, and the sliding ring 5 is raised, and the legs 6 are folded.

When the toggle mechanism 11 is released and the sliding ring 4 is lowered,
The arm 7a and the seat body 8 are folded into a cylindrical shape, which can be stored in a cylindrical case 20.

In the embodiment described above, a tension coil spring is stretched between the arm and the leg, and the arm and the leg are
Although the coil spring is used to quickly expand the arm, the spring may be omitted and the arm can be expanded by hand.

The seat body may be detachable without being fixed to the free end of the arm.

Instead of a toggle mechanism, the stopper for fixing the upper sliding member to the column may be a pin-like member similar to the lower member.

[Effect of idea]

(a) The arms and leg rods that support the seat can be folded into a cylindrical shape along the upper and lower outer circumferential surfaces of the column, so after folding, they can be stored in a cylindrical case, making them easy to carry. Become.

(b) The chair has a pillar located at the center of the seat, which mainly bears the load, making the chair stable and comfortable to sit on.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is a cross-sectional view taken along the - line in FIG. FIG. 5 is a side view showing only the mechanism, and FIG. 5 is a front view with the arms and two front legs of the legs omitted to show the procedure for folding the chair shown in FIG. 2. 1... Prop, 2... Lid plate, 3... Mounting tube, 4,
5... Sliding ring, 6... Leg, 6a... Leg rod, 6b...
...Lower rotating rod, 7...Support arm, 7a...Arm,
7b... Upper rotating rod, 7c... Upper end, 8... Seat body, 8a... Canvas fabric, 8b... Cylindrical part, 1
0... tension coil spring, 11... toggle mechanism,
13...handle rod, 15...stop pin, 1
7...Horizontal hole.

Claims (1)

[Scope of utility model registration request] The lower ends of multiple arms are pivotally attached to the upper part of the outer peripheral surface of the mounting tube fixed to the vertical center of the column, and the upper ends of multiple leg rods are also pivotally attached to the lower part of the mounting tube. At the top and bottom, a pair of upper and lower sliding rings that are movable in the vertical direction are fitted onto the pillars, and the inner and outer ends of the lower rotating rod are respectively pivotally connected to the lower sliding ring and the lower end of the leg rod. At the same time, the inner and outer ends of the upper rotating rod are pivotally connected to the upper sliding ring and the arm, a seat body is provided spanning the upper end of each arm, and the upper and lower sliding rings are connected to each other. By providing a stopper to be hooked to the column and raising and lowering the upper and lower sliding rings, the arms and leg rods can be folded.Furthermore, when the lower sliding ring is lowered to its lower limit, each leg The lower end of the rod, together with the lower surface of the column,
A folding chair characterized by being designed to touch the floor almost at the same time.