JP3146179B2 - 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 capable of swinging.

[0002]

2. Description of the Related Art A folding chair has been proposed which is capable of performing a so-called swinging operation in which the seat cloth is swayed back and forth arbitrarily by shifting the weight of a seated person. The swingable basic structure of this folding chair is such that a rectangular front leg frame and a rear leg frame are crossed at an intermediate position between both side rod portions, and between the side rod portions located at the front and rear at the vertical position of the crossing portion. Are connected by upper and lower link rods, and a cushion is stretched between upper horizontal rods of the front and rear leg frames, and a four-node link mechanism having a cross rod is provided.

[0003] More specifically, a folding chair provided with two high and low rectangular leg frames and a backrest provided with the higher frame as a front leg frame (July 7-413).
No. 92, and the rear leg frame with a U-shaped upper opening,
Folding chairs connecting the front ends of the upper link rods to form front horizontal rods (Design Registration Nos. 306281 and 399557)
No. 6-15547).

[0004]

By the way, each of the folding chairs described above has a new problem due to the provision of the backrest portion. That is, since the backrest constitutes a part of the front leg frame, the entire front leg frame becomes large and not compact, and since the link mechanism is also integrated, the folding operation itself limits the link mechanism. Therefore, the folding operation becomes complicated. In addition, the relative position of the front and rear horizontal bars where the cushion is stretched, the relative position does not change even if the swinging operation is performed, and even if the backrest is provided, the sinking state of the cushion is constant. The angle of the backrest cannot be changed. Therefore, the present invention proposes an improvement to make a folding chair having a swing function easier to use.

[0005]

SUMMARY OF THE INVENTION A folding chair according to the present invention comprises a front leg frame and a rear leg frame having a lower side rod and left and right side rods. So that it is located inside the middle of the two side rods, and the side rods located before and after at the upper and lower positions of the crossing part are connected with the link rods, and each of the side rods ahead of the upper link rod pivot connection position. In a folding chair which can swing by stretching a seat cloth between each horizontal rod part provided between the left and right rod parts,
It is characterized in that one connecting position of the lower link rod is provided so as to be adjustable.

Therefore, by changing the connecting position of the lower link rod, the relative distance between the front and rear horizontal rod portions on which the cushion is attached is changed, and a reclining function is provided.

[0007]

Next, an embodiment of the present invention will be described. The folding chair shown in the embodiment has a U-shaped front leg frame 1, a rear leg frame 2, an upper link frame 3, and a lower link frame 4 each having left and right side rod portions.
And a backrest frame 5 and a seat cloth 6,
The front leg frame 1 and the backrest frame 5 have the same width and have a width in contact with the inside of the upper link frame 3, the rear leg frame 2 has a width in contact with the outside of the upper link frame 3, and the lower link frame 4 has a narrow rod. Formed by the rear leg frame 2
Is the width that comes into contact with the inside of the.

The front and rear leg frames 1 and 2 comprise
The upper link frame 3 is positioned above the front and rear leg frames 1 and 2 by disposing the horizontal rods 31 in front of the front link legs 1 and 21. The top of the side rod 12 of the frame 1 is pivotally connected to the base of the side rod (upper link rod) 32 of the upper link frame 3, and the upper end of the side rod 22 of the rear leg frame 2 is connected to the upper link frame. 3 is connected to a side rod portion 32 near the front horizontal rod portion 31. The side rod portion 32 of the upper link frame 3 is appropriately curved so as to protrude upward so as to form an armrest, and is covered with an appropriate cover portion 33.

The lower part of the intersection of the front and rear leg frames 1 and 2
The lower link frame 4 is connected with a lower link frame 4, and a hook receiving portion 13 formed in a hook shape and in multiple stages is provided on the side rod portion 11 of the front leg frame 1. ) Is pivotally connected to the side rod portion 22 of the rear leg frame 2, and the front rod portion 42 is selectively hooked to the hook receiving portion 13.

The backrest frame 5 has a side rod portion 51, a top rod portion (which will be a rear horizontal rod portion) 52 above the side rod portion 51, and a side rod portion 51 that is parallel to the top rod portion 52. Cushion stop rod 53
The side rod 51 is connected to the side rod 12 of the front leg frame 1.
At the pivotal connection point of the upper link frame 3 and the side rod portion 32 of the upper link frame 3, is connected to the side rod portion 12, is pivotally connected to the side rod portion 32 of the upper link frame 3, and further extends downward from the pivotal connection point. And a hook lever 54 which can be hooked on the receiving shaft 14 of the front leg frame.

One end of the seat cloth 6 is wound around the front horizontal rod section 31 of the upper link frame 3, has an appropriate bend, is folded back by the top rod section 52 of the backrest frame 5, and the end is seated. It is fixed to the rod 53.

At the time of use, when the hook lever 54 is hooked on the receiving shaft portion 14 and the front rod portion 42 of the lower link frame 4 is hooked on the hook receiving portion 13, the state becomes a chair and the seat cloth 6 is attached. When the user sits down, leans against the backrest, and shifts his or her own weight, it swings back and forth by the link mechanism and can be used like a rocking chair.

Further, when the position where the front rod portion 42 of the lower link frame 4 is latched is changed, the relative angle between the backrest frame 5 and the upper link frame 3 changes as illustrated in FIG. It will have a reclining function by falling backward or standing forward.

When the backrest frame 5 is disengaged from the receiving shaft 14 when it is folded and stored, the connection between the backrest frame 5 and the front leg frame 1 is released, and the backrest frame 5 is independently moved to the upper part. Because it can rotate around the pivotal connection with the link frame,
Simply folding the upper link frame 3 downward and bending the backrest frame 5 forward can easily be folded.

In the present invention, a link rod is used in place of the upper link frame 3, and a front horizontal rod section 31 is provided between the upper ends of the side rod sections 22 of the rear leg frame 2 so as to form a frame. The frame may be used, and the lower link frame may be a link rod instead of the U-shape, and the connection / disconnection structure with the front leg frame may be arbitrarily determined as long as the connection position can be changed.

[0016]

As described above, the present invention relates to a folding chair which is capable of swinging back and forth as a four-node link mechanism by connecting the crossing portions of the crossed front and rear leg frames by a link rod. In particular, the connecting position of the lower link rod is provided so as to be adjustable, and a swingable folding chair is further provided with a reclining function.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is a side view (an explanatory view of a swing state).

FIG. 3 is a side view showing the reclining function.

FIG. 4 is a side view of the folded state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front leg frame 11 Lower side rod part 12 Side rod part 13 Latch receiving part 14 Receiving shaft 2 Rear leg frame 21 Lower side rod part 22 Side rod part 3 Upper link frame 31 Front side rod part 32 Side rod part (upper link rod) 33 Cover part 4 Lower link frame 41 Side rod part (lower link rod) 42 Front rod part 5 Backrest frame 51 Side rod part 52 Top rod part (rear horizontal rod part) 53 Seat stopper rod part 6 Seat cloth

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-272029 (JP, A) JP-A 54-139509 (JP, U) JP-A 53-65309 (JP, U) JP-A 62 200950 (JP, U) Japanese Utility Model Hei 6-15547 (JP, U) Japanese Utility Model 47-82094 (JP, Y1) Japanese Utility Model 7-11774 (JP, Y1) Japanese Utility Model 7-41392 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47C 3/02 A47C 4/28 A47C 5/10

Claims (1)

(57) [Claims] 1. A front leg frame and a rear leg frame having a lower side rod portion and a left and right side rod portion are mounted on both side rod portions such that the side rod portion of one frame is located inside the side rod portion of the other frame. Crossed at an intermediate point, linking the side rods located at the front and rear at the upper and lower positions of the crossed part with link rods, and each horizontal rod provided between the left and right side rods ahead of the upper link rod pivot position In the meantime, in a folding chair that can swing by stretching a seat cloth, the lower link rod is formed in a U-shaped frame,
Connect the open end to the side bar of the rear leg frame
A multi-stage hook receiving portion is formed below the side rod portion of the
The front rod part of the link frame is selectively
A folding chair characterized by being provided so that it can be detached from each other .