JPH0131086Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention combines the front leg frame and the rear leg frame in a human shape,
The edges of both sides of the seat are pivoted in the middle of the height of both leg frames, and when in use, the front and back leg frames are opened in a human-shaped manner, and the seat is held horizontally, making it possible to sit while not being used. Sometimes the front and rear leg frames are aligned parallel to each other, and the seat is also aligned parallel to improve folding chairs so that they can be folded flat.More specifically, the height of the front leg frames is Incorporating a new connecting means that connects the middle of the rear leg frame and the upper end of the rear leg frame in a swingable and removable manner, ensuring a solid assembly, smooth folding operation, and a beautiful finish. This relates to a folding chair that has been made available. Conventionally, the front leg frame and rear leg frame are combined in a human shape, and when the legs are opened, the seat is held horizontally, and when the legs are closed, the seat is folded so that it is aligned with the leg frame. The chair is widely known.

This folding chair will not fold if the distance between the front and rear leg frames and the three pivot points of the seat does not change at least at one point when the seat is flipped up from the open leg position and the legs are closed. I've learned not to give up,
For this reason, conventionally, a link member was inserted at one of the three pivot points, and the distance between the two points was changed by the rotation of this link member, allowing the front and rear leg frames to be closed after opening. At the same time, the horizontally supported seat can be folded.

However, this connection of the pivot points by the link member is unfavorable in terms of appearance, and the insertion of the link member essentially reduces the number of pivot points to four, which complicates movement and increases the number of rotating parts. As a result, it was easily damaged and difficult to assemble.

The present invention was devised in view of these conventional drawbacks, and includes a freely expandable and retractable connection consisting of female and male members between the middle of the height of the front leg frame and the upper end of the rear leg frame connected to this. By inserting a means, when the legs are opened, the male and female members collide and contract, and when the legs are closed, the male and female members are separated and extended, and the seat is folded around the pivot pivoted on the front leg frame. Our goal is to provide a folding chair with a design that looks like this.

That is, the present invention eliminates the conventional link member by inserting the male and female members, thereby simplifying the movement during the folding operation and making it possible to operate smoothly. By reducing this, the structure is strong, and assembly and manufacturing are facilitated.

Hereinafter, embodiments illustrating the present invention will be described in detail. Figure 1 is a perspective view showing the folding chair according to the present invention in a state in which the legs are opened, and Figure 2 is a side view in the middle of folding. It is.

In the figure, numeral 1 is a front leg frame formed by bending a metal pipe material into a vertically long U-shape, 2 is a synthetic resin backrest that is passed between the upper ends of the front leg frame, and 3 is made of metal like the front leg frame 1. The rear leg frame is formed by bending a pipe into a U-shape, and numeral 4 is a seat that is assembled by pivoting the left and right side edges in the middle of the height of the front and rear leg frames.

The rear leg frame 3 shown here has its left and right width wider than the width of the front leg frame 1 by at least the diameter of the pipe material, so that the width between the inner surfaces is somewhat larger than the width between the outer surfaces of the front leg frame. The left and right upper ends and the middle of the height of the front leg frame are connected by a connecting means consisting of two female and male connecting members 5 and 6, and the shape is approximately human-shaped when viewed from the side. It is assembled to do this.

The female and male connecting members 5 and 6 are molded from synthetic resin as shown in Figs. A rod 7 bent in a dogleg shape is inserted in the middle of the rod, and one end of the rod 7 is pivotally attached to the front leg frame 1 via a pin 8 so that it can swing freely. . The other female member 6 has a vertical through hole 9 formed in the center thereof, and the rod 7 is slidably inserted into the female member 6, and the other female member 6 is fitted into the upper end opening of the rear leg frame 3 made of pipe. About half of the length is inserted and fixed.

These two members have opposing ends having the same cross-sectional shape, and both open ends of a bellows-shaped cylindrical cover 10 are fitted to the both ends to cover the abutting portions. .

In the figure, 11 is a support shaft for pivotally connecting the front leg frame 1 and the seat 4, and 12 is a support shaft for pivotally connecting the rear leg frame 3 and the seat 4.

The support shaft 11 directly penetrates the pipe material of the front leg frame, and is pivoted to the side edge of the seat 4 with a spacer 13 inserted between them, and the other support shaft 12 is attached to the inner surface near the upper end of the rear leg frame. seat 4 via spacer fitting 14 welded to
It is pivoted on the side edge of the

The spacing fitting 14 extends between the rear leg frame 3 and the seat 4, and when the rear leg frame 3 is folded to align with the front leg frame as described later, the back surface of the front leg frame comes into contact with the front surface of the spacer. This mechanism acts to align both leg frames in parallel, and here, a support shaft 1 is installed on the side edge of the seat using a piece of metal bent into an L-shape as a bearing piece.
2 is attached to the shaft.

Now, the folding chair of the present invention is constructed as described above, and when in use, the front leg frame 1 and the rear leg frame 3 are opened forward and backward as shown in Fig.
The seat 4, which is pivoted at 1 and 12, can be kept horizontal and supported in a state where it can be sat on. At this time, female and male connecting members 5 and 6 connecting the front leg frame and the rear leg frame upper end are connected.
As shown in Figures 3 and 4, the cylindrical cover 10 is in a contracted state with its opposing ends abutting against each other, and while the leg opening of both leg frames is kept constant, the cylindrical cover 10 is contracted accordingly. state.

When not in use, the front edge of the horizontally supported seat 4 is lifted and rotated about the support shaft 11 of the front leg frame, and as a result of this rotation, the support shaft 12 located at the rear of the seat is pushed down. At the same time, the rear leg frame 3 connected via the metal fittings 14 is pushed down, so the rod 7 inserted into the female member 6 extends, and the space between the female and male members is extended, and the female member is pushed around the pin 8 as a fulcrum. As the seat 5 swings, it rotates around the seat 4 support shaft 11 as a fulcrum until it becomes parallel to the front leg frame, and at the same time,
The rear leg frame is pushed down while extending the female and male connecting members, and is swung around the pin 8 as a fulcrum until the spacing retaining fitting 14 comes into contact with the back surface of the front leg frame, and the legs are closed in parallel. .

In this way, the folding chair of the present invention can be folded by rotating the seat 4 about the support shaft 11, while the front and rear leg frames can be folded by rotating the seat 4 in the opposite direction. It can be converted to a state where you can sit with your legs spread apart.
While it is as easy to handle as conventional folding chairs of this type, the chair of the present invention has the front leg frame, rear leg frame, and seat pivoted at three points, eliminating the need for conventional link members. Since the number of rotating parts has been reduced, the number of damaged parts such as wear has been reduced, resulting in a product with high reliability in terms of strength.

In addition, when the chair of the present invention opens and closes the front and rear leg frames, the operation can be performed simply by sliding the rod 7 inserted into the through hole 9 of the female member 6 made of synthetic resin in the insertion/removal direction, which eliminates abnormal noise. The female member 6 and the male member 5 are covered with a cover 10 and appear as one in appearance, and the rod 7 that is exposed during extension is also covered, making it aesthetically pleasing. This is more preferable than a chair using a conventional link member.

Particularly, in the folding chair of the present invention, the male and female connecting members 5 and 6 are connected by inserting the rod 7, and the upper end of the rear leg frame is extended and contracted by sliding in the direction of insertion and removal. Since it expands and contracts, it is structurally reasonable, and the risk of damage is extremely small.
When the legs are opened, the connecting members collide linearly with each other without applying a direct load to the rods to maintain the rearward tilted posture of the front leg frames, which provides a stable support function for the rear leg frames, giving the seated occupant an extremely high sense of stability. can be given.

In the above embodiment, the end of the connecting member 5 is bent in a dogleg shape, but this is because when the legs are closed, the rear leg frame 3 is moved rearward and parallel to the front leg frame 1 in cooperation with the spacing retaining fitting 14. Therefore, if the shape of the metal fitting 14 is changed and the rear leg frame and front leg frame are parallel to each other on the left and right when the legs are closed, the male member may be formed straight. It is not limited to.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a perspective view showing the legs in use, Fig. 2 is a side view showing the legs in the middle of folding, Fig. 3 is an enlarged side view of the main part with a partial cross section when the legs are spread, and Fig. 4 is the same. The front view and FIG. 5 are enlarged side views of main parts, partially in section, when the legs are closed. 1... Front leg frame, 2... Backrest, 3... Rear leg frame, 4
... Seat, 5... Connecting male member, 6... Connecting female member,
7... Rod, 8... Pin, 9... Through hole, 10
...Cover, 11, 12...Spindle.

Claims (1)

[Scope of utility model registration request] A front leg frame formed in a vertically long rectangular shape with a backrest provided at the upper end, and a rear leg frame assembled into a doll shape by connecting both upper ends formed in a U-shape so as to be freely rotatable in the middle of the height of the front leg frame. , the left and right side edges are pivoted midway between the heights of the front leg frame and the rear leg frame, so that when the legs are opened, they are supported horizontally, and when the legs are closed, the front edges are lifted up using the pivot point with the front leg frame as a fulcrum. In a folding chair consisting of a seat that can be folded in parallel, a connecting male member having a rod is pivotally attached to the middle of the height of the front leg frame via a pin to freely swing; A connecting female member having a through hole in the center is fitted to each upper end of the rear leg frame, and the rod is slidably inserted into the through hole of the member to connect the upper end of the rear leg frame and the front leg frame. The female and male connecting members are connected so as to be removable and detachable, and both ends of bellows-shaped covers are fitted to the abutting ends of the female and male connecting members to cover the abutting ends and the rod. folding chair.