JPH0350776Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications The present invention relates to a folding chair.

BACKGROUND ART AND PROBLEMS There are some folding chairs that open and close in the width direction, and others in the front-rear direction. Chairs that open and close in the width direction are widely used as they have the advantage of greater seating stability, but conventional chairs of this type require folding, so not only the seat but also the backrest is made of flexible material such as cloth. Because it was made of soft material, stable support for the seater's back could not be obtained. Therefore, the seater is unable to lean back with a sense of stability, and is restricted from taking a large backward leaning posture or using the backrest portion to bend backward.

The object of the present invention is to solve these problems of conventional folding chairs, and to provide a folding chair that can be folded in the width direction of the chair and can provide stable support for the seater.

Means for Solving the Problems The object of the present invention is to provide a pedestal that can be folded in the width direction of the chair, a pair of backrest frames extending substantially parallel to each other from both sides of the pedestal, and a backrest plate whose both sides are supported by a frame, and the backrest frame has a lower end that is rotated to the pedestal part by a pivot so that a mutually parallel state can be maintained as the pedestal part is folded and unfolded. The pivot portion includes a mounting pipe whose one end is tightly fitted into the backrest frame and whose other end is loosely inserted into the pedestal portion, and at the insertion point of the pipe into the pedestal portion. an elongated hole extending in the circumferential direction provided therein; a retaining screw screwed into the elongated hole from the pedestal; and a projecting piece extending from the peripheral wall of the backrest frame toward the pedestal; Provided on the pedestal portion to receive the protruding piece, and when the pedestal frame is folded and unfolded and the backrest frame assumes a mutually parallel position, an edge portion is brought into contact with the protruding piece. and a recess for regulating the range of rotation of the backrest frame, and the backrest plate includes a plurality of backrest pieces connected so as to be bendable around an axis substantially perpendicular to the width direction of the chair, and a recess at both ends of the backrest plate. This is achieved by a folding chair comprising: a mounting portion for rotatably mounting the backrest piece to the backrest frame about an axis substantially parallel to the frame.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The chair shown in FIG. 1 includes a backrest plate 1, a backrest frame 2, a seat frame 3, and a leg frame 4.
and a seat cloth 5. The leg frame 4 is made up of two rectangular metal pipes that are pivotally supported by a shaft 40 extending in the front-rear direction of the chair at the center in the height direction so as to form an X-shape when viewed from the front. Seat frame 3
are fixed to the upper pipe of the leg frame 4 with screws, and the seat cloth 5 is supported by the seat frame 3 with the annular portions on both sides thereof covered with the seat frame 3. These seat frame 3 and leg frame 4
The seat cloth 5 constitutes a pedestal portion that can be folded and unfolded in the width direction of the chair. The backrest frame 2 is attached to the seat frame 3 so as to be rotatable about the seat frame axis, and extends straight from the attachment point after being bent so as to stand up in the open state. The backrest plate 1 includes backrest pieces 10, 10 that are divided into two at the center by a plane perpendicular to the width direction of the chair, and a hinge 11 that extends along the divided part and foldably connects the backrest pieces 10, 10. , an attachment part 12 for attachment to the backrest frame 2, and a cushion 13.
It is equipped with The backrest piece 10 is made of a metal plate, and the side end on the attachment part 12 side is bent into an annular shape to form a bearing part 100. Hinge 11
cushion 13 for backrest pieces 10 and 10
The backrest pieces 10, 10 can be folded toward the side where the hinge 11 is attached. Furthermore, the hinge 11 is provided with a stopper (not shown) that abuts in the rotational direction when opened and prevents the hinge from opening more than 180 degrees. A pair of attachment parts 12 are provided on both sides of the backrest plate 1, and support rods 120 extend parallel to the hinge 11.
, a support plate 122 that supports the shaft rod 121 at the upper and lower ends thereof, and a backrest frame 2 that extends horizontally outward from the longitudinal center of the support rod 120. The support shaft 123 passed through the mounting hole in
It is equipped with The cushion 13 is also divided into two parts, each with an attachment band 130 attached to the backrest piece 1.
It is attached to the backrest piece by attaching it to the backrest piece. Therefore, the backrest plate is folded under the action of the hinge 11 and the attachment part 12 when the chair is folded. Further, since the backrest piece 10 is made of a metal plate, its high rigidity stably supports the back of the seater during use. Further, the backrest plate 1 is connected to the backrest frame 2 by the support shaft 123.
Since the seat is mounted so that it can rotate around the horizontal axis, the seater can easily tilt back by using the rotation of the backrest plate 1. You can take a tilted or arched posture.

Various structures can be adopted for attaching the backrest frame 2 to the seat frame 3 so as to be rotatable about the seat frame axis, and for example, the structure shown in FIG. 3 can be adopted. . In this example, the mounting pipe 20 is tightly fitted into the backrest frame 2 and protrudes.
is loosely passed through the seat frame 3.
It is possible to rotate against the Installation pipe 2
0 has a long hole 21 at the tip, and a screw 30 screwed into the side wall of the seat frame 3 enters into this long hole 21 to prevent it from coming off. A protruding piece 22 is formed on the end side wall of the backrest frame 2, and a recess formed in the end side wall of the seat frame 3 to receive the protruding piece 22 and having a certain length longer than the protruding piece 22 in the circumferential direction. A location 31 is provided. Therefore, the backrest frame 2 is supported in a fixed manner relative to the seat frame 3 and is rotatable. This rotation range is determined by the difference in circumferential length between the protruding piece 22 and the recess 31. Therefore, this difference is determined so that the backrest frame 2 can take a mutually parallel posture when the chair is folded and in use.

In the above example, the backrest plate has a backrest piece divided into two pieces, but it can also be divided into three or more pieces, and each backrest piece can be joined together in a bendable manner. In order to attach the backrest piece to the backrest frame so that it can rotate around an axis parallel to the frame, the backrest piece and the backrest frame can be connected with a hinge, in addition to using the two rods 120 and 121 as described above. An appropriate configuration can be adopted, such as.

In addition to the above-mentioned example, various configurations can be adopted as the pedestal part that can be folded in the width direction of the chair, such as the one shown in FIG. 4, for example. In this example, the two rectangular metal pipes of the leg frame 4A are not mutually supported,
The lower part is supported by a chain 41, and the upper part is supported by a seat cloth 5A stretched between the seat frames 3A to maintain the unfolded state. In addition, this pedestal part can be rocked in the width direction of the chair.
In this example, similar parts and members to those in FIG. 1 are designated by the same numbers.

Effects of the Invention As is clear from the above, according to the present invention, it is possible to provide a folding chair that has the following effects. That is, the pedestal part is foldable in the width direction of the chair, the lower end of the backrest frame is rotatably attached to the pedestal part so that they can be kept parallel to each other, and the backrest plate is connected so that it can be bent. The chair is equipped with a plurality of backrest pieces, which are attached to the backrest frame at both ends so as to be rotatable about an axis parallel to the frame. By forming the seat with a material having high rigidity, the seater can be stably supported.

Further, the backrest frame is mounted with excellent functionality by a pivot portion that can maintain a mutually parallel state as the pedestal portion is folded and unfolded. That is, the pivot part is held in position in the axial direction of the pipe by a long hole extending in the circumferential direction of the pipe and a retaining screw inserted therein, based on the mounting pipe inserted into the backrest frame and the pedestal part. In addition, due to the protruding piece extending from the backrest frame and the recess provided in the pedestal part to receive the protruding piece and restrict the rotation range of the backrest frame, the above-mentioned effect is achieved when the pedestal part is folded and unfolded. The backrest frames are held in mutually parallel positions, and by holding both these positions, a stable and robust usage condition is realized even though the backrest frame is foldable.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a folding chair according to an embodiment of the present invention, FIG. 2 is a perspective view of the backrest plate of the chair shown in FIG. 1, and FIG. 3 is a perspective view of the backrest frame of the chair shown in FIG. FIG. 4 is a perspective view showing a part of the joint with the seat frame with a portion cut away, and FIG. 4 is a perspective view of another embodiment of the present invention. 1... Backrest plate, 2... Backrest frame, 10... Backrest piece, 11... Hinge, 12...
...Mounting part, 13...Cushion.

Claims (1)

[Scope of utility model registration request] The chair comprises a pedestal part that can be folded in the width direction of the chair, a pair of backrest frames extending substantially parallel to each other from both sides of the pedestal part, and a backrest plate whose both sides are supported by the backrest frame. The backrest frame has a lower end rotatably attached to the pedestal part by a pivot part so as to maintain a mutually parallel state as the pedestal part is folded and unfolded, and the pivot part has one end an attachment pipe that is tightly fitted into the backrest frame and whose other end is loosely inserted into the pedestal; a circumferentially extending elongated hole provided at the insertion point of the pipe into the pedestal;
a retaining screw screwed into the pedestal and intruding into the elongated hole; a protruding piece extending from the peripheral wall of the backrest frame toward the pedestal; and a protruding piece provided on the pedestal. When the backrest frame reaches a mutually parallel position during acceptance, folding and unfolding of the pedestal portion, the rotation range of the backrest frame is restricted by bringing an edge into contact with the projecting piece. The backrest plate includes a plurality of backrest pieces that are connected so as to be bendable around an axis substantially perpendicular to the width direction of the chair;
A folding chair comprising: a mounting portion for mounting the backrest pieces at both ends to the backrest frame so as to be rotatable around an axis substantially parallel to the frame.