JPH0421311Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a folding chair with a back 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,
There was a problem in that it was not smaller than the seat frame and was bulky, making it troublesome to carry.

[Means for solving problems]

The present invention aims to provide a folding chair with a back, in which foldable legs are arranged around the outer periphery of a support so that the chair becomes cylindrical when folded.

That is, in the folding chair with a back according to the present invention, the lower ends of a plurality of arms are pivoted at appropriate positions on the outer circumferential surface of the central part of the support column, and the upper ends of a plurality of leg members are attached below. A pair of upper and lower sliding members, which are movable in the vertical direction, are fitted around the upper and lower ends of the column, and a lower rotating rod is attached to the lower sliding member and the leg member. a stopper whose ends are pivotally connected to each other, a seat is supported at the upper end of each arm, and both sliding members are latched at the end positions of the columns; and a lower end is pivotally connected to the leg member; The apparatus is also provided with a back support rod whose intermediate portion is locked so as to be movable up and down, and a back attached to the back support rod.

〔Example〕

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

Reference numeral 1 denotes a cylindrical support column, the upper and lower openings of which are closed by cover plates 2, 2 having a larger diameter retaining collar 2a.

At the center of the column 1 in the vertical direction, there is a cylindrical main body 3a that can be fitted into the column 1, and on the outer peripheral surface of the main body 3a, there are arranged cylinders facing in the radial direction and at equal intervals along the outer peripheral surface. A mounting tube 3 consisting of a plurality of (six in the embodiment) protruding pieces 3b is fixed.

Further, on the support column 1, upper and lower sliding members, for example, sliding rings 4 and 5, which form a pair of upper and lower members and have projecting pieces 4a and 5a extending in the radial direction on the outer peripheral surface, are attached to the mounting tube 3. It is inserted in such a way that it can be moved up and down freely.

Reference numeral 6 denotes legs, including six leg members 6a whose upper ends are pivoted to the lower end of the protruding piece 3b of the mounting tube 3 and whose lower ends are inclined downward in the radial direction, and whose outer ends are attached to the leg members 6a. It consists of a lower rotating rod 6b which is pivotally attached and whose inner end is pivotally attached to the projecting piece 5a of the sliding ring 5, and when the sliding ring 5 is raised, the leg member 6a is folded.

Reference numeral 7 denotes support arms, the lower end of which is pivotally attached to the upper end of the protruding piece 3b of the mounting tube 3, and the upper end of which is inclined upward in the radial direction, including six arms 7a;
It consists of an upper rotating rod 7b which is pivotally connected to the middle part of the sliding ring 4 and whose inner end is pivotally connected to the protrusion 4a of the sliding ring 4, and when the sliding ring 4 rises, the free end 7c will be expanded.

8 is a longitudinal cut groove 8' in the center of one side of the square tube.
By providing this, it is a back support rod with a slot 9 inside, and its lower end 8a is pivoted with a hinge 10 near the lower end of the leg member 6a.

In the middle part 8b of the back support rod 8, the slot 19 has a head 11a and a leg piece 11, as shown in FIG.
b, and the head 11a of the sliding piece 11 having a T-shaped cross section is slidably inserted.

The leg piece 11b of the sliding piece 11 is pivotally attached with a pin 13 to a mounting base 12 having a U-shaped cross section and attached to the leg member 7a.

Therefore, as shown in FIG.
When the leg member 6a is expanded, the free end 8c of the back support rod 8 is expanded, and as shown in FIG.
In the stored state, it is folded along the pillar 1.

Reference numeral 14 denotes a tension coil spring, the upper end of which is attached to the intermediate portion of the arm 7a, and the lower end of which is attached to the leg member 6.
The supporting arm 7 and the leg 6 are respectively hung at the middle part of the
and is constantly biased in the direction of expansion.

Reference numeral 15 denotes a pin-shaped stopper attached to the sliding rings 4 and 5 with a chain 16. By inserting this stopper 15 into the horizontal holes 17 and 18 passing through the sliding ring 5 and the support column 1, , support arms 7 and legs 6 can be held in an expanded state.

In FIG. 5, reference numeral 19 indicates the back, and there are three cylindrical bodies 19a whose lower surfaces are open, and the adjacent cylindrical bodies 19a, 1.
The cylindrical body 19a is made up of two back cloths 19b that connect the back support rods 9a to each other, and the cylindrical body 19a is connected to the free end 8c of the back support rod 8.
It is designed so that it can be inserted into the

20 shown in Fig. 6 is a seat body made of hard material.
The triangular plates 20a are connected to each other by a thin wall portion 20b to form a regular hexagon that can be freely folded, and an annular hanging piece 20c is connected to the lower edge of the circumferential surface thereof.

21 shown in FIG. 7 is a cylindrical case.

To use the folding chair with a back as described above, first, as shown in FIG. The sliding rings 4 and 5 are inserted into the horizontal holes 17 and 18 to be hooked to the support column 1.

Next, the back 19 is attached to the back support rod 8, and the seat body 2 is placed between the upper end surfaces of each arm 7a and on the cover plate 2 of the support 1.
0, it can be used as a chair with a back as shown in FIG.

When not in use, as shown in Figure 3, the seat 20
When the back 19 is removed, the stopper 15 is pulled out, and the sliding rings 4 and 5 are moved toward the central mounting tube 3, the arm 7a and the leg 6a are folded, and the back support rod 8 is also folded at the same time. Folded.

As shown in FIG. 7, the periphery of the folded chair is secured with a rubber band 22 and can be stored in a case 21.

[Modified example]

In the above-described embodiment, a tension coil spring is provided between the arm and the leg member, but this may be omitted and the arm etc. may be expanded by hand.
Further, the seat body or back may be foldable and attached to the chair.

The stopper for hanging the sliding material on the support is
It may be a combination of an engagement protrusion provided on the support column so as to be freely retractable and an engagement hole cut in the inner circumferential surface of the sliding member so as to be able to be engaged with and disengaged from the engagement protrusion. Further, the base end portions may be pivotally attached to both ends of the support column, and the stopper may be provided with hooks for releasably engaging the sliding member.

[Effect of idea]

As detailed above, in the folding chair with a back according to the present invention, the arms and legs are folded along the outer peripheral surface of the support, so after folding, it can be stored in a cylindrical case without being bulky. It has the advantage of being easy to carry.

In addition, a pillar is placed in the center of the seat to support the load, and the back is attached, making it comfortable to sit on.
The stability of the chair is also excellent.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a front view of the chair with the seat body and back removed, and Fig. 3 is a front view of the chair in the folded state shown in Fig. 2. FIG. 4 is a front view with the arms and legs omitted.
The cross-sectional view taken along the - line in Fig. 3 and Fig. 5 are as follows:
FIG. 6 is a front view of the back, FIG. 6 is a perspective view of the seat body, and FIG. 7 is a perspective view showing the chair and case in a folded state. 1... Support column, 2... Lid body, 3... Mounting tube, 4,
5... Sliding ring (sliding material), 6a... Leg material, 6b...
...Lower rotating rod, 7a... Arm, 7b... Upper rotating rod, 7c... Free end, 8... Back support rod, 9...
Slot hole, 11...Sliding piece, 14...Tension coil spring, 15...Stopper, 17, 18...Horizontal hole, 1
9...back, 20...sitting body, 21...case.

Claims (1)

[Scope of utility model registration request] The lower ends of the plurality of arms are pivotally attached to an appropriate position on the outer peripheral surface of the central part of the support column, and
The upper ends of a plurality of leg members are pivotally attached to the lower part of the column, and the upper and lower ends of the support column are movable in the vertical direction.
Fitting a pair of sliding members on the outside, and pivotally connecting the ends of the lower rotating rod to the lower sliding member and the leg member, respectively, and supporting a seat body at the upper end of each arm, and a stopper for latching both sliding members at the end positions of the pillars, a back support rod whose lower end is pivotally connected to the leg member and whose middle portion is latched so as to be movable up and down, and the back support rod. A folding chair with a back, characterized by having a back attached to the back.