JPH0736799U - Folding chair legs - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a folding leg of an auxiliary seat chair that has excellent durability while being made compact by folding. In an auxiliary seat chair having a plate-shaped seat portion and a pair of folding legs that have a pivotal support portion on a lower surface of the seat portion and are swingably arranged to switch between a folding posture and a rising posture. The pivoting pivot portion pivotally supports the upper end portion of the leg on the end portion of the support plate fixed to the lower surface of the seat portion, and the folding leg connects the upper side portion and the lower side portion with the support portion and the upper side portion. A protrusion that abuts against this portion is formed on the support plate portion in the vicinity of the support portion, and a support point on which the load of the lower side portion acts is formed in a substantially Z shape in side view so that it is located inside the upper side portion. It is a thing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a folding leg of an auxiliary seat chair which prevents the leg from being numbed by being placed under the buttocks when sitting for a long time.

[0002]

[Prior art]

 Generally, in this type, the legs are folded to make it compact, and when used, the folded legs 103 are folded and installed as shown in FIG. 4, and the buttocks are placed on the seat 102 for use. .

[0003]

[Problems to be solved by the device]

 However, in the general auxiliary seat chair 101 shown in FIG. 4, the pair of legs 103 are opened in a “C” shape, and the legs are gradually opened due to the weight and the like, and the legs are easily damaged and the durability is low. There was a problem. The present invention has been proposed in view of the above problems, and an object of the present invention is to provide a folding leg of an auxiliary seat chair that is excellent in durability while not being folded and made compact.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the folding leg of the 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, and can be switched between a folding posture and a standing posture. In an auxiliary seat chair having a pair of foldable legs that are swingable, the pivoting support portion pivotally supports the upper end portion of the leg on the end portion of a support plate fixed to the lower surface of the seat portion, The folding leg connects the upper side and the lower side with the supporting part, and the supporting plate part near the upper side and the supporting part is formed with a protrusion protruding against this part, and the load on the lower side is It is characterized in that it is formed in a substantially Z shape in a side view so that the supporting point to act is located in the upper side portion.

[0005]

[Action]

 First, when carrying the auxiliary seat chair, 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, and becomes a small size that is convenient to carry. Next, when carrying an auxiliary seat chair, the folded legs are set up by folding them up, and the buttocks are placed on top of this, and at this time, the load of the seat is transmitted to the installation part. Since the supporting point on the lower side of the leg where the load acts is located inside the upper side, and the protrusion that is projected from the support plate portion comes into contact with the corner between the upper side and the supporting portion, Since the distance to the pivot is long and the force to open the pivot is small, the legs do not spread even after long-term use.

[0006]

【Example】

 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 includes an oval-shaped seat portion 2 and a pair of folding legs 3 swingably provided on a lower surface of the seat portion 2.

The seat portion 2 is formed by providing a cushioning material (both not shown) such as urethane foam on the upper surface of the substrate, and covering the surface with the cloth 4, and at the bottom surface of the seat portion 2, folding legs are provided. A support plate 5 for pivotally supporting 3 is fixed. As shown in FIG. 2, the support plate 5 has a winding portion (rotating pivotally attaching portion) 6 for pivotally supporting the upper end portion of the leg 3 described later, which is formed in the middle of both ends of a rectangular thin steel plate. The corners and the portions in the vicinity of the corners are fixed to the lower surface of the seat portion 2 by fixing tools 7 such as screws.

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 arranged in different directions. The upper part 8 is bent into a substantially "Z" shape in a side view, and the upper part 8 serves as an abutting piece (upper side) 10 for fixing the standing position of the leg 3, and the lower part 9 serves as a grounding piece ( The lower side portion 11 is provided, and a supporting column (supporting portion) 12 is provided between the contact piece 10 and the ground piece 11.

Further, a projection 16 that abuts against this portion is formed on the portion of the support plate 5 in the vicinity of the corner between the contact piece 10 and the supporting column 12. 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 position directly above the point (support point) 14 at which the ground piece 11 receives a force from the installation surface 13 is the contact piece. It is located within a range H from the position where the corner portion 10 abuts the protrusion 16 of the support plate 5 to the tip of the abutting piece 10.

In the figure, reference numeral 15 is a synthetic resin applied so as to cover the grounding piece 11 portion.

The operation of the auxiliary seat chair 1 configured as described 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 with the winding portion 6 as the center of rotation. Then, the auxiliary seat 1 becomes approximately the size of the seat 2 and has a small shape 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 legs 3 are folded up and installed at a desired place, and the buttocks are placed on the legs 3 for use. At this time, the leg 3 is formed in a “Z” shape in a side view, and the support point 14 of the lower side portion 9 of the leg 3 that transmits the load of the seat portion 2 has the projection 16 of the support plate 5 at the corner of the contact piece 10. Since it is located within the range H from the position where it abuts against the tip of the abutting piece 10, a large load acts on it even after long-term use due to the lever principle with the protrusion 16 as the fulcrum. The force that expands the winding portion 6 of the leg 3 does not largely act, and the leg 3 does not spread.

[0013]

EFFECTS OF THE INVENTION A pair of legs are folded around the pivotal support of the seat so as to be close to the lower surface of the seat. Then, the auxiliary seat can be made small in size of about the seat portion, and can be made into a small shape convenient for carrying the auxiliary seat. Also, when carrying an auxiliary chair, fold the folded legs and install it, and place the buttocks on it. At this time, the supporting point where the load of the lower side of the leg that transmits the load of the seat portion to the installation portion acts is located in the upper side portion, and the corner of the upper side portion and the supporting portion is projected from the supporting plate portion. Since the distance between the part where the protrusion contacts and the pivot part is long because the protrusion contacts, the force to open the pivot part is small, and the legs do not spread even after long-term use. There is an advantage that the durability of the 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 symbols]

 DESCRIPTION OF SYMBOLS 1 ... Auxiliary seat 2 ... Seat 3 ... Folding leg 5 ... Support plate 6 ... Rotational pivot support 10 ... Upper side 11 ... Lower side 12 ... Support part 14 ... Support point 16 ... Protrusion

Claims (1)

[Scope of utility model registration request] 1. An auxiliary seating chair having a plate-shaped seat portion and a pair of folding legs which are provided with a pivoting support portion on a lower surface of the seat portion and are swingably arranged by switching between a folding posture and a standing posture. In the child, the pivoting support part pivotally supports the upper end part of the leg on the end part of the support plate fixed to the lower surface of the seat part, and the folding leg connects the upper side part and the lower side part with the support part, and the upper side part A protrusion that abuts against this portion is formed on the support plate portion in the vicinity of the support portion and the support portion, and the support point on which the load of the lower side portion acts is located in the upper side portion in a substantially Z shape in side view. Folding legs of the auxiliary seat chair characterized by being formed.