JP2515078Y2 - Folding chair legs - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding leg of an auxiliary seat chair which is placed under the buttocks and prevents the legs from becoming numb when sitting for a long time.

[0002]

2. Description of the Related Art Generally, in this type, a leg is made small by folding it, and when it is used, a folded leg 103 is folded and installed as shown in FIG. 4, and a buttock is placed on a seat 102 for use. It is like this.

[0003]

However, in the general auxiliary seat chair 101 shown in FIG. 4, the pair of legs 103 is "ha".
There is a problem that the legs are gradually opened due to the weight and the like, and the legs are easily damaged due to the weight and the durability is low. The present invention has been proposed in view of the above problems, and an object thereof is to provide a folding leg of an auxiliary seat chair that is excellent in durability while being made compact by folding.

[0004]

In order to achieve the above object, a folding leg of an auxiliary seat chair according to the present invention has a plate-shaped seat portion and a pivoting support portion on the lower surface of the seat portion. In an auxiliary seat chair having a pair of folding legs arranged to be swingable by switching between a posture and a standing posture, the folding legs have one end side portion of the upper side portion and the other end side portion of the lower side portion as a supporting portion. Under the seat.
Rotation of the folding leg at the end of the support plate fixed to the surface
Forming a pivot, arranged in line symmetry in the central part of the auxiliary seat
Rotate the other end of the upper side of the folded leg to the pivotal support.
The pivot point is movably supported, and the supporting point where the load on the lower side acts is on the side.
Fold it so that it is located within the substantially horizontal part of the upper side that can be seen.
Forming a folding leg and extending outward from the pivot support
Abutting the upper edge of the folding leg to the end of the supporting plate
It is characterized in that the protrusions are formed to project.

[0005]

When carrying the auxiliary seat chair, first, the pair of legs are folded so as to be close to the lower surface side of the seat part with the pivotal support part as the center of rotation. Then, the auxiliary seat becomes approximately the size of the seat, which makes it convenient to carry. Next, when carrying an auxiliary chair, fold up the folded legs and install it,
The buttocks are placed on top of this, and at this time, the supporting point on which the load of the lower side of the leg that transmits the load of the seat to the installation part acts is located within the substantially horizontal part of the upper side that can be placed in side view. and and and projections for projection which projects into the corner unit from the support plate portion between the upper portion and the support portion abuts is rather long distance from the abutting portion to pivot portion, to try to open the pivot portion Since the strength is reduced, the legs will not spread even after many years of use.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of an auxiliary chair, and in the figure, reference numeral 1 generally indicates the auxiliary chair. The auxiliary chair 1 is provided with an oval-shaped seat portion 2 and a pair of folding legs 3 swingably provided on the lower surface thereof.

The seat portion 2 is formed by providing a cushioning material such as urethane foam (both not shown) on the upper surface of the substrate and covering the surface with a cloth 4, and the folding leg 3 is formed on the lower surface of the seat portion 2. A supporting plate 5 for pivoting is fixed. As shown in FIG. 2, the supporting plate 5 has a winding portion (rotational pivoting portion) 6 for pivotally supporting the upper end portion of the leg 3 described later in the middle of both ends of a thin steel plate formed in a rectangular shape, and The parts and the vicinity of the corners are fixed to the lower surface of the seat 2 by a fixing tool 7 such as a screw.

The leg 3 whose upper end portion is pivotally supported by the winding portion 6 is formed by bending a steel wire into a substantially quadrangular frame shape, and an upper side portion 8 and a lower side portion 9 thereof are horizontally oriented in mutually different directions. Bend it to form a "Z" shape in side view,
The upper side portion 8 is used as an abutting piece (upper side portion) 10 when the standing position of the leg 3 is fixed, and the lower side portion 9 is a grounding piece (lower side portion).
11, and a support column (support portion) 12 is provided between the contact piece 10 and the ground piece 11.

In addition, a projection 16 is formed on the portion of the support plate 5 near the corner between the contact piece 10 and the supporting column 12 so as to abut against this portion. Here, the positional relationship between the contact piece 10 and the ground piece 11 will be described in detail. As shown in FIG. 3, the folding leg 3 includes one end side of the contact piece 10 and the ground piece 11.
The other end side of the is connected to the support part in a substantially Z shape in side view.
The end of the support plate 5 formed and fixed to the lower surface of the seat 2.
Rotate the other end side of the contact piece 10 of the leg 3 to the winding part 6 of the section
Pivot as much as possible, and the grounding piece 11 receives force from the installation surface 13.
An abutting piece whose position directly above the point (support point) 14 can be placed in a side view
It is positioned within the range H of the substantially horizontal portion of 10 .

Reference numeral 15 in the figure is a synthetic resin applied so as to cover the grounding piece 11 portion.

The operation of the auxiliary seat chair 1 constructed as above will be described below. First, when carrying the auxiliary seat chair 1, the pair of legs 3 are folded in a state of being close to the lower surface of the seat portion 2 around the winding portion 6 as a rotation center. Then, the auxiliary seat 1 becomes approximately the size of the seat portion 2 and has a small shape that is convenient to carry, so that it can be put in a bag or the like and carried around for lessons and rehearsals.

Next, when the auxiliary seat 1 is used, the folded leg 3 is folded up and installed at a desired place,
The buttocks are placed on this and used. At this time, leg 3
Is formed in a "Z" shape in a side view, and from the position where the support point 14 of the lower side 9 of the leg 3 that transmits the load of the seat 2 abuts the protrusion 16 of the support plate 5 at the corner of the abutment piece 10. Since it is located within the range H to the tip of the abutting piece 10, a large load is applied due to the lever principle with the projection 16 as a fulcrum, and the winding part of the leg 3 is used even after many years of use. The force for expanding 6 does not act so much that leg 3 does not expand.

[0013]

EFFECTS OF THE INVENTION A pair of legs are folded around the pivotal support of the leg so as to be close to the lower surface of the seat. Then, the auxiliary seat chair can be made small in size of a substantially seat portion, and can be made into a small shape convenient for carrying the auxiliary seat chair. Also, when carrying an auxiliary chair, the folded legs should be folded up and installed, and the buttocks should be placed on top of this. At this time, the support point where the load of the lower side of the leg that transmits the load of the seat to the installation portion acts is located in the upper side,
In addition, since the protrusion protruding from the support plate portion abuts on the corner portion between the upper side portion and the support portion, the distance from the portion abutting the protrusion to the pivot support portion becomes long, so that the force to open the pivot support portion is increased. It has the advantage that it becomes smaller, the legs do not spread even after long-term use, and the durability of the auxiliary chair can be greatly improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an auxiliary seat chair.

FIG. 2 is a perspective view of the back surface of the auxiliary chair.

FIG. 3 is a side view of a leg.

FIG. 4 is a side view of an auxiliary seat chair according to a conventional example.

[Explanation of Codes] 1 ... Auxiliary seat 2 ... Seat 3 ... Folding leg 5 ... Support plate 6 ... Rotating pivot support 10 ... Upper side 11 ... Lower side Part 12 ... Support part 14 ... Support point 16 ... Protrusion

Claims (1)

(57) [Scope of utility model registration request] 1. An auxiliary seating chair having a plate-shaped seat portion and a pair of folding legs that are provided with a pivoting support portion on the lower surface of the seat portion and are swingably arranged to switch between a folding posture and a standing posture. In the child, the folding legs are one side of the upper side and the other side of the lower side.
The end portion is connected to the support portion to form a substantially Z shape in a side view.
The end of the support plate, which is formed on and fixed to the lower surface of the seat
The pivoting support of the folding leg is formed in the center of the auxiliary seat.
The other end of the upper side of the folding leg, which is arranged in line symmetry
Rotatably supports the lower part on a pivotal support part, and the supporting point on which the load on the lower part acts can be placed in a substantially horizontal part of the upper part where it can be placed in side view.
Form the folding legs so that they
At the end of the support plate that extends outward from the branch, fold it
A folding leg for an auxiliary seat chair, characterized in that a protrusion that abuts the upper side of the leg is formed to project.