JP2810608B2 - Folding chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding chair which can be folded and stacked.

[0002]

2. Description of the Related Art As a folding chair of this kind, for example,
A front leg in which a metal pipe is formed in a substantially U shape and a backrest is attached to the open end thereof; a rear leg in which the metal pipe is also formed in a substantially U shape; and a seat pivotally supported by the front leg and the rear leg. There is known a configuration in which a seat jumps up when a front leg and a rear leg approach each other, and the front leg, the rear leg, and the seat can be folded substantially in a plane.

[0003]

However, in the above-mentioned structure, when not in use, it can be folded flat and stacked, so that there is an advantage that less storage space is required as compared with other chairs which cannot be folded. However, the front legs and the rear legs made of a metal pipe are liable to slip even if they are in contact with each other when they are stacked.

[0004] Further, in many cases, the horizontal base rods of the front legs and the rear legs are provided with anti-slip members made of synthetic resin or the like. It is attached only in consideration of the stability of the chair, and has a cylindrical shape surrounding the base rod. Therefore, even when such a slide prevention member is provided, when folded and stacked, the outer peripheral surfaces of the slide prevention member only come into contact with each other, and when stacked, a function is provided to prevent slide. However, there is a problem that misalignment or collapse easily occurs.

[0005] An object of the present invention is to solve such a problem.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the folding chair according to the present invention, the front legs,
The rear leg and the seat are configured to be able to be folded substantially in a plane, and at least one of the front leg and the rear leg is substantially U-shaped having a base rod placed parallel to the floor surface, In the one in which the anti-slip member is attached to the base rod, the anti-slip member has a first engagement portion on the front surface,
Further, a second engaging portion having a shape engageable with the first engaging portion is provided on the back surface.

[0007]

With such a structure, when folded and stacked in a plane, the first engaging portion of the lower chair anti-slip member is engaged with the second engaging member of the upper chair. The mating portions are engaged, and the slip preventing members of the chairs are engaged with each other so as not to be located. Therefore, even if a large number of chairs are stacked, it is possible to effectively prevent the occurrence of lateral displacement and prevent the stacked state from being collapsed.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. The folding chair 100 shown in FIG.
, And the rear leg 2 and the seat 3 can be folded substantially in a plane. The front leg 1 and the rear leg 2 are substantially U-shaped having base rods 11 and 21 placed parallel to the floor surface, and the slip prevention member 4 is mounted on the base rod 21 of the rear leg 2.

The front leg 1 and the rear leg 2 are formed by bending a steel pipe into a substantially U-shape, and rotatably support the side surface 31 of the seat 3. That is, the substantially intermediate portion 12 of the front leg 1
Is mounted on the side surface 31 of the seat 3 slightly behind the intermediate portion in the depth direction of the seat 3, and the rear leg 2 has an upper end 22.
Is attached to the lower side of the backrest 5 of the front leg 1 from the outside of the front leg 1, and a portion slightly lower than the upper end 22 is connected to a side surface 31 a near the rear edge 32 of the seat 3 via a connection fitting (not shown). It is connected rotatably. Moreover, front leg 1 and rear leg 2
The rear leg 2 is attached to the outside of the front leg 1 so that the rear leg 2 and the seat 3 are located substantially in the same plane when folded. At the open end of the front leg 1, a backrest 5 which is curved backward to fit the shape of the back is attached. In such a backrest 5, when folded, the curved rear surface 5a projects rearward from a plane including the front leg 1, the rear leg 2, and the seat 3.

The anti-slip member 4 is made of a soft synthetic resin, and two of them are used. Each of the anti-slip members 4 is formed in a cylindrical shape having a substantially rectangular parallelepiped having a central portion in the longitudinal direction having an inner diameter slightly smaller than the outer diameter of the base rod 21. An incision 43a is formed in the upper surface 43, and the lower surface 44 is formed in a convex curved surface in order to improve the contact property in use. The anti-slip member 4 is provided in FIG.
Back surface 4 which is the rear side in use condition as shown in FIGS.
5 is formed with an engagement projection 41 which is a second engagement portion having a rectangular parallelepiped shape, and the first engagement projection 41 having a size matching the shape of the engagement projection 41.
The engaging concave portion 42 which is an engaging portion has a front surface, that is, the engaging convex portion 41.
Is provided on the front surface 46 facing the rear. Thus, the slip prevention member 4 is fitted into the base rod 21 of the rear leg 2 at a predetermined distance from the incision 43a of the upper surface 43, and
At a predetermined angle with the horizontal, that is, the rear surface 4
5 is fixed with an adhesive or the like at an angle parallel to the central axis of the inclined portion 22 of the rear leg 2. In other words, by being fixed to the base rod 21 at such an angle, when the storage unit is folded horizontally for storage and placed horizontally,
The engaging recesses 42 are directed directly downward.

In such a configuration, when the seat 3 folded during storage is pushed forward and downward in use, the front leg 1 and the rear leg 2 are greatly opened in the front-rear direction, and the seat 3 is brought into a substantially horizontal state. It becomes a form to hold. In this state, the anti-slip member 4 of the base rod 21 of the opened rear leg 2 comes into contact with the floor surface at its lower surface 44, and when the force for pushing the seat 3 backward is applied, the base rod 21 moves rearward. It prevents sliding.

On the other hand, the folding chair 10 is used for storage.
0, the front leg 1, the rear leg 2, and the seat 3 are located on substantially the same plane as shown in FIG.
Project from the front leg 1 rearward. In this state, in the slip prevention member 4, the engagement convex portion 41 and the engagement concave portion 42 are oriented in a direction perpendicular to a virtual plane to which the front leg 1, the rear leg 2, and the seat 3 belong. That is, when the folding chair 100 is placed in a horizontal state, the engaging projections 41 face up, and conversely, the engaging recesses 42 face down. Therefore, as shown in FIGS. 4 and 5, when the second folding chair 100b is stacked on the first folding chair 100a placed on the floor, the first folding chair 100b becomes the first folding chair 100b.
Of the anti-slip member 4 of the folding chair 100a of FIG.
1 fits into the engagement recess 42 of the anti-slip member 4 of the second folding chair 100b, and the first folding chair 100
The back surface 5a of the backrest 5 of the second folding chair 100
b comes into contact with the front surface of the backrest 5.

When stacked in this manner, in the base rod 21 of the rear leg 2 of each of the folding chairs 100, the movement of the rear leg 2 in the left and right and front and rear directions is prohibited by the anti-slip member 4, and the backrests 5 are connected to each other. Due to the contact, the movement of the backrest 5 is also prohibited. That is, when a large number is sequentially stacked in the same manner, the weight is added as the stacking is performed, so that the lower ones are engaged with the respective slide prevention members 4 with a larger load, and the stacking is easily broken. There is no.

The shape of the anti-slip member 4 is not limited to the above-described embodiment. For example, in the anti-slip member 4 shown in FIGS. 6 and 7, when placed horizontally so as to be folded and stacked, the downward surface becomes a convex surface 141 a just below the base rod 21, and a portion connected to the convex surface 141 a. The upper and lower edges of the rearward facing surface are an upper engaging edge 142 and an lower engaging edge 143 that curve in parallel, and the upward facing surface is a base rod. At a position directly above the concave surface 144a, and a ridge 144b
And is formed such that curved surfaces engage in the front-rear and left-right directions. That is, when the folding chairs 100 are stacked, each of the slip prevention members 4
As shown in FIG. 8, the concave surface 144 of the engagement upper surface portion 144 is
The convex surface 141a of the engaging lower surface portion 141 engages with the portion a, and the concave groove 141b engages with the convex ridge 144b, thereby preventing the folding chair 100 from moving in the front-rear direction.
At the same time, the upper engagement edge 142 of the lower slide prevention member 4 and the lower engagement edge 143 of the upper slide prevention member engage to move the folding chair 100 in the left-right direction. Block. Thus, smoothly continuous surfaces and grooves,
The movement in each direction is prevented by engaging the surface, the strip, and the edge, so that even if an external force is applied to the stacked folding chairs 100, they do not easily slide down.

The present invention is not limited to the embodiment described above. In addition, the configuration of each unit is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

[0016]

According to the present invention, as described in detail above, the first engaging portion of the anti-slip member and the second engaging portion of the anti-slip member stacked thereon are folded and stacked one on top of the other. Since the parts are engaged with each other, it is possible to easily prohibit the movement of the base rod from the stacked state, and it is possible to reliably prevent the things stacked on top from sliding down.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention as viewed from the back.

FIG. 2 is an enlarged perspective view showing a slide prevention member of the embodiment.

FIG. 3 is a cross-sectional view of the slide prevention member according to the embodiment in an attached state.

FIG. 4 is an exemplary perspective view showing a state where the embodiment is folded and stacked;

FIG. 5 is a sectional view of the same example in a folded and stacked state.

FIG. 6 is an enlarged perspective view showing a slip prevention member according to another embodiment.

FIG. 7 is a cross-sectional view of another embodiment in which a slide prevention member is mounted.

FIG. 8 is a perspective view showing a state of being folded and stacked in another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Front leg 2 ... Rear leg 3 ... Seat 4 ... Anti-slip member 21 ... Base rod 21a ... Front 41 ... Engagement convex part 42 ... Engagement concave part 45 ... Back 46 ... Front

Continued on the front page (56) References JP-A 3-96748 (JP, U) JP-A 63-73044 (JP, U) JP-A 60-74652 (JP, U) JP-A 55-93359 (JP) , U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47C 3/04 A47C 4/00-5/14 A47B 91/04

Claims (1)

(57) [Claims] 1. A front rod, a rear leg, and a seat are configured to be folded substantially in a plane, and a base rod is provided on which at least one of the front leg and the rear leg is placed parallel to a floor surface. In a folding chair having a substantially U-shaped configuration and a slide prevention member attached to a base rod thereof, the slide prevention member has a first engagement portion on a front surface and engages with a first engagement portion on a rear surface. A folding chair comprising a second engaging portion having a shape that can be fitted.