JP3178288U - Folding chair - Google Patents

Abstract

[PROBLEMS] To prevent a seat from standing up and falling even if a load is applied from above to the rear of the seat in a state where the seat is deployed in a horizontal state. A folding chair that is simple and can be folded easily during storage is provided.
A left and right front leg 1, left and right rear legs 2, and a seat portion 3 are provided. The rear leg 2 and the front leg 1 are pivotally attached so that lower ends thereof are opened and closed in the front and rear directions, and both side portions of the seat portion 3 are disposed on the left and right sides. The slider 6 is pivotably attached to the front leg 1 of each side, and sliders 6 are provided to protrude from the left and right sides of the seat part 3. The left and right rear legs 2 are provided with a groove-shaped slide part 10 along the rear leg 2, and a slide part. The rail 7 which consists of the stopper part 11 bent horizontally toward the front of 10 end is provided. Further, when the slider 6 is slidably engaged with the rail 7, the position of the seat portion 3 is restricted to the horizontal state and the standing state, and the slider 6 is positioned at the stopper portion 11 when the seat portion 3 is in the horizontal state. To do.
[Selection] Figure 10

Description

  The present invention relates to a folding chair that can be stored with the front and rear legs and seats closed flat when not in use, and is prevented from being accidentally folded when opened.

As shown in FIGS. 1 to 3, the conventional folding chair includes a pair of left and right front legs a, a pair of left and right rear legs b, and a seat portion c. The upper end portion of the rear leg b is pivotally attached to the middle portion in the vertical direction of the front leg a, and a backrest d is installed between the upper end portions of the left and right front legs a.
The middle part in the front-rear direction on both side surfaces of the seat part c is rotatably attached to the left and right front legs a below the axially attached part of the front leg a and the rear leg b.
A slide groove e is formed in the rear leg b along the vertical direction, and sliders f projecting on both sides of the rear end portion of the seat c are slidably and rotatably engaged with the slide groove e. Has been.
Further, slightly above the upper end of the slide groove e, a horizontal beam g is installed between the left and right rear legs b, and a seat receiving projection h is provided on the lower surface of the horizontal beam g.

When using a folding chair, the front end of the seat c is separated from the backrest d, the seat c is tilted forward, the slider f is raised along the slide groove e, and the lower ends of the front leg a and the rear leg b. Open the department. When the seat portion c becomes horizontal, the seat receiving projection h comes into contact with the upper surface of the rear portion of the seat portion c, and stops the seat portion c at that position.
On the other hand, when storing the folding chair, the folding chair is brought close to each other with the backrest d and the front end of the seat c. Then, the slider f slides downward along the slide groove e, the lower ends of the front legs a and the rear legs b approach, and as shown in FIG. 3, the slider f moves to the lower end of the slide groove e. The seat part c stands up and the whole is folded flat.

In such a folding chair, when the weight is applied to the front part of the seat part c in a state where the seat part c is horizontal, the rise of the rear part of the seat part c is restricted. The horizontal state is maintained, and the lower ends of the front legs a and the rear legs b are open and stable.
However, when a child climbs up to the seat c or stands on the seat c instead of using a chair as a platform, if the weight is applied only to the rear part of the seat c, the slider f slides downward. The part c stands up, and the lower ends of the front leg a and the rear leg b are closed, so that it is easy to fall.
In addition, when unfolding the folding chair, it is very dangerous to put a finger or the like between the seat c and the seat receiving projection h.

Furthermore, there exists a thing described in patent document 1 as a highly safe folding chair which can be hold | maintained in the expand | deployed state.
The folding chair includes a front leg member and a rear leg member whose upper ends are rotatably connected, a seat body rotatably attached to a middle part of the front leg member, and a vertical part in a middle part of the rear leg member. And a guide groove formed with an upper locking recess and a lower locking recess at the upper end and the lower end, respectively, and axially biased at the lower rear end of the seat body, and the guide groove And a slide shaft that is slidably engaged with the slide shaft.
When the seat body is lying down, the slide shaft engages with the lower locking recess, and when the seat body is upright, the slide shaft engages with the upper locking recess, and the seat body rotates. The movement is prevented and the state can be stably maintained.

In addition, in order to open and close the folding chair by releasing the seated body from the fallen state and the standing state, the handle interlocked with the slide shaft is picked, the slide shaft is retracted against the urging force, and the slide shaft and the upper portion are engaged. After releasing the engagement with the stop recess or the lower locking recess, the lower end of the rear leg member is rotated with respect to the front leg member.
However, the knob provided on the rear end of the lower surface of the seat body is not easy to operate, and the lower end of the rear leg member is rotated to the front leg member side only with the other hand while the knob is pinched with one hand. It was very difficult to do.
Moreover, since the slide shaft is protruded by a spring and retracted by picking a knob, there is a possibility that the slide shaft does not appear and disappear smoothly when the folding chair is repeatedly opened and closed.

JP-A-10-155590

  The problem to be solved by the present invention is that when the seat is deployed in a horizontal position, there is no fear of the seat standing and falling even if a load is applied to the rear of the seat from above. It is an object of the present invention to provide a folding chair that is not easily pinched, has a simple structure, and can be easily folded during storage.

  The present invention includes a pair of left and right front legs, a pair of left and right rear legs, and a seat, and the left and right rear legs and the left and right front legs are respectively pivotally attached so that lower ends thereof open and close in the front-rear direction. The middle part in the front-rear direction of each part is pivotally attached to the middle part in the up-and-down direction of the left and right front legs, and sliders are provided in the rear part on both sides of the seat part to project in the left-right direction. In the folding chair in which the seat is regulated in a horizontal state and a standing state by the slider being slidably engaged with the rail, the rail is arranged in the longitudinal direction. It has a groove shape with groove walls on both sides, and comprises a slide portion along the rear leg and a stopper portion bent forward so that it is horizontal when one end of the slide portion is unfolded, and the seat portion is in a horizontal state. Sometimes The slider is positioned at the stopper portion.

According to the folding chair of the present invention, when the seat portion is in a horizontal state, the slider provided at the rear portion of the seat portion is positioned at the horizontal stopper portion, so that the seat portion is closed on the upper surface of the seat portion. Even if a biased load is applied, the slider cannot move in the vertical direction. Therefore, the seat portion is stably held in a horizontal state and does not close carelessly, and the safety is high.
Also, when the chair is unfolded, the slider enters the stopper and the seat is supported in a horizontal state, so there is no need for a seat receiving projection that receives the rotated seat in the horizontal state. There is no worry about pinching your fingers between them.

It is a perspective view in the unfolded state of the conventional folding chair. It is a rear view in the expansion state of the conventional folding chair. It is a side view in the closed state of the conventional folding chair. It is a perspective view in the unfolded state of the folding chair which shows the Example of this invention. It is a side view in the unfolded state of the folding chair which shows the Example of this invention. It is a side view in the closed state of the folding chair which shows the Example of this invention. It is a front view of the strip and slider which concern on the Example of this invention. It is a bottom view of the strip and slider which concern on the Example of this invention. The rail which concerns on the Example of this invention is shown, (A) is a front view, (B) is a side view. It is a principal part side view in the unfolding state of the folding chair which shows the Example of this invention. It is a principal part side view in the middle of folding of the folding chair which shows the Example of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 4 to 6, the folding chair includes a pair of left and right front legs 1, a pair of left and right rear legs 2, and a seat portion 3. In this embodiment, the front leg 1 and the rear leg 2 are made of wooden bars, and the seat portion 3 is made of plywood with a cushioning material superimposed on the surface.
Between the upper ends of the left and right front legs 1, a backrest 4 made of plywood is installed, and in the middle part in the vertical direction of the left and right front legs 1, the middle parts in the front and rear direction on both sides of the seat part 3 are respectively connected via pins 5. And is pivotally attached.

In addition, slightly above the pin 5, the upper ends of the left and right rear legs 2 are pivotally attached to the middle portions of the left and right front legs 1, and the lower ends of the front legs 1 and the rear legs 2 are opened and closed in the front-rear direction. It is supposed to be.
Sliders 6 are provided on the rear portions of both side surfaces of the seat portion 3 so as to protrude in the left-right direction, and rails 7 for guiding the sliders 6 are provided on the left and right rear legs 2 along the longitudinal direction.
When the seat 3 rotates about the pin 5, the slider 6 slides along the rail 7. When the seat 3 is in a horizontal state, the slider 6 is positioned at the upper end of the rail 7 (FIG. 5). When the part 3 stands up, the slider 6 is located at the lower end of the rail 7 (FIG. 6).
The above configuration is substantially the same as that of a conventional folding chair, but there is no seat receiving projection for receiving the upper rear portion of the seat portion 3 when deployed.

As shown in FIG. 7 and FIG. 8, a metal strip 8 is mounted along the width direction on the lower rear portion of the seat portion 3, and the slider 6 is placed on the hanging piece 9 formed at both ends of the strip 8. Fixed to protrude in the direction.
In the present embodiment, the slider 6 is formed of a round rivet and penetrates the hanging piece 9 with its shaft portion facing outward.
In addition, there is an effect which reinforces the seat part 3 by attaching the strip 8.

The rail 7 attached to the rear leg 2 is made of synthetic resin, and includes a slide part 10 along the rear leg 2 and a stopper part 11 at the upper end of the slide part 10 as shown in FIG.
The slide part 10 is formed in a groove shape having groove walls 12 on both sides along the longitudinal direction. The stopper portion 11 is bent forward horizontally, and the base portion of the stopper portion 11 is gently curved and continues to the upper end of the slide portion 10.
In addition, fixing holes 13 are formed in the upper and lower end portions and the intermediate portion of the stopper portion 11 and the slide portion 10, respectively.

As shown in FIGS. 10 and 11, the rail 7 has a stopper portion 11 which is pin 5 when the front leg 1 and the rear leg 2 are opened on the inner side surface of the rear leg 2 (the opposite surfaces of the left and right rear legs 2). It is fixed by screwing a screw 14 into the rear leg 2 through the fixing hole 13 at a position where the height is approximately the same as that of the rear leg 2.
The slider 6 is engaged between the groove walls 12 on both sides, and slides along the slide portion 10 and the stopper portion 11.

When the folding chair in the closed state is used, the front end portion of the seat portion 3 and the backrest 4 are held by hand and separated from each other.
Then, the seat part 3 rotates in the direction in which the rear part ascends around the pin 5, and accordingly, the slider 6 at the lower end part of the rail 7 gradually rises, and at the same time, the front leg 1 and the rear leg 2. The lower end of is gradually opened.
The raised slider 6 is guided smoothly by the curved portion from the upper end of the slide portion 10 to the stopper portion 11 and smoothly moves forward. When the slider 6 is engaged with the stopper portion 11 as shown in FIG. Part 3 is in a horizontal state.

When a person sits on the seat 3 in this state, the lower ends of the front leg 1 and the rear leg 2 try to spread each other, but the slider 6 hits the front end of the stopper 11 and the rear leg 2 cannot move away from the front leg 1. Therefore, the folding chair can stably support the load.
Further, even if a load is applied only to the upper rear portion of the seat portion 3, the stopper portion 11 where the slider 6 is located extends horizontally, so the slider 6 cannot slide downward, and as a result, the seat portion. 3 is held in a horizontal state.

When the folding chair is stored, the front end portion of the seat portion 3 and the backrest 4 are brought close to each other.
Then, the lower end of the rear leg 2 rotates in a direction approaching the front leg 1, and at the same time, the stopper portion 11 also approaches the front leg 1, and the slider 6 can escape from the stopper portion 11.
Since the seat portion 3 tends to rotate around the pin 5 in the direction in which the rear portion descends, the slider 6 that has escaped from the stopper portion 11 descends along the slide portion 10 as shown in FIG. The lower end of the rear leg 2 gradually approaches.
As shown in FIG. 6, when the slider 6 reaches the lower end portion of the slide portion 10, the seat portion 3 stands up so that the front legs 1 and the rear legs 2 become parallel, and the folding chair is folded flat.

In addition, the shape of each member of the folding chair is not limited to the illustrated one, and the material of each member is not limited to the above embodiment.
Moreover, like the folding chair described in patent document 1, you may fold by raising the front end part of a seat part and making it horizontal state, and falling down the front end part of a seat part below. In this case, the rail has a stopper portion bent horizontally forward at the lower end of the slide portion. When the seat portion is in a horizontal state, the slider is positioned at the stopper portion at the lower end of the slide portion, and when the seat portion is tilted, the slider is positioned at the upper end portion of the slide portion.

DESCRIPTION OF SYMBOLS 1 Front leg 2 Rear leg 3 Seat part 4 Backrest 5 Pin 6 Slider 7 Rail 8 Strip board 9 Hanging piece 10 Slide part 11 Stopper part 12 Groove wall 13 Fixing hole 14 Screw

Claims (1)

A pair of left and right front legs, a pair of left and right rear legs, and a seat portion are provided, and the left and right rear legs and the left and right front legs are respectively pivotally attached so that the lower end portions thereof open and close in the front-rear direction. The middle part is pivotally attached to the middle part in the vertical direction of the left and right front legs, respectively, and sliders are provided on the rear parts on both sides of the seat part to project in the left and right direction, and the rails along the longitudinal direction are provided on the left and right rear legs, respectively. And the slider is slidably engaged with the rail so that the seat is positioned in a horizontal state and a standing state, and the rail is on both sides along the longitudinal direction. A groove shape having a groove wall, comprising a slide portion along the rear leg and a stopper portion bent forward so that the slide portion is horizontal when one end of the slide portion is unfolded. Folding chair that Zehnder is characterized in that positioned in the stopper unit.

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