JPH11178671A - Folding chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a chair compact when being folded, and facilitate the folding operation by a method wherein the top and the bottom, the front and the rear of a crossed part of front and rear leg frames which are crossed, are connected to linking rods, and a four nodal point linking constitution is formed to make the chair swingable in the longitudinal direction, and a back rest part is made detachable. SOLUTION: This folding chair is constituted of a front leg frame 1, a rear leg frame 2, an upper linking frame 3, a lower linking frame 4, a back rest frame 5, which are formed into a U-shape equipped with right and left side rod parts respectively, and a seat fabric part 6. At the time of usage, an insertion rod of the back rest frame 5 is inserted in a connecting part 13 of the front leg frame 1, and the seat fabric part 61 is sufficiently deflected with a play, and is folded back at a top rod part 52 of the back rest frame 5, and a connecting lateral rod 62 is engaged with a seat fabric connecting part 53, and a chair state is formed. Then, a user sits on the seat fabric 61, leans to the back rest side, and the chair swings in the longitudinal direction by the link mechanism when the user performs a weight moving himself, and this chair can be used such as a rocking chair.

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, when a backrest is provided and a seatcloth is stretched using the backrest, the relative position of the front and rear horizontal rods for supporting the seatcloth does not change even if the rocking operation is performed. . For this reason, even if the backrest is provided, the state of sinking of the cushion is constant, and the backrest angle cannot be changed. Therefore, the present invention proposes an improvement to make a folding chair having a swing function easier to use.

[0006]

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 they are located inside the middle of the two side rods, and the upper and lower side rods and the left and right side rods A swingable folding chair having a cushion between the horizontal rods and the like positioned at the rear end of the upper link rod or the rear end of the side rod of the front leg frame. It is characterized in that the end portion of the side rod portion of the backrest frame formed in a shape is detachably connected, the backrest frame is held at the backrest position, and is pivotally connected to the seat cushion side so that it can be folded. It is assumed that.

Therefore, the entire backrest frame can be easily made compact by separating the backrest frame or folding the backrest side, and the folding can be easily performed.

In the folding chair according to the present invention, in particular, the seat cushion is stretched in a state where it is bent between the front and rear horizontal rods positioned between the left and right side rods so that one connecting position of the lower link rod can be adjusted. It is characterized by being provided.

Therefore, by changing the connection position of the lower link rod, the relative distance between the front and rear horizontal rod portions on which the cushion is stretched and the connection angle of the backrest frame also change. Will have.

[0010]

Next, an embodiment of the present invention will be described. <First Embodiment> The folding chair shown in the embodiment has a U-shaped front leg frame 1 having left and right side rods,
The rear leg frame 2, the upper link frame 3, the lower link frame 4, the backrest frame 5, and the seat cushion portion 6 are provided, and the front leg frame 1 and the backrest frame 5 have the same width. The rear leg frame 2 is a width that contacts the outside of the upper link frame 3, and the lower link frame 4 is formed of a thin rod and has a width that contacts the inside of the rear leg frame 2. is there.

The front and rear leg frames 1 and 2 are
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 upper part of the side rod part 12 of the frame 1 is pivotally connected to the base of the side rod part (which will be the upper link rod) 32 of the upper link frame 3, and the upper end part of the side rod part 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.

In particular, the leading end of the upper part of the side rod part 12 of the front leg frame 1 is connected to the side rod part 32 of the upper link frame by extending the distal end part by an appropriate length to the rear. If the frame is made of pipes,
The connection receiving portion 13 is formed as a (naturally cylindrical shape). 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.

Below the intersection of the front and rear leg frames 1 and 2,
The lower link frame 4 is connected by a lower link frame 4, and a hook receiving portion 14 formed in a hook shape and formed 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 14.

The backrest frame 5 includes a side rod portion 51, a top rod portion (which becomes a rear horizontal rod portion) 52 above the side rod portion 51, and a hook-like shape formed on the side rod portion 51 near the top rod portion 52. An insertion rod 54 that can be inserted into the connection receiving part 13 of the front leg frame 1 is connected to the base end of the side rod part 51.

The seat cloth part 6 is connected to one end of a seat cloth 61 of an appropriate length by winding it around the front horizontal rod part 31 of the upper link frame 3, and the other end is connected to the side rod part of the backrest frame 5. A pillow portion 63 is provided on the connecting horizontal rod 62 corresponding to the distance between 51 and provided on the way.

In use, the backrest frame 5
Is inserted into the connection receiving portion 13 of the front leg frame 1, the seat cloth 61 of the seat cloth part 6 is sufficiently bent with sufficient space, and folded back by the top rod part 52 of the backrest frame 5. The connecting horizontal rod 62 is hung on the cushion connecting portion 53 to be in a chair state. When the user sits down on the cushion 61, leans on the backrest side, and shifts weight by himself, the link mechanism swings back and forth. It works and can be used like a rocking chair.

Further, when the position where the front rod 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 is changed as shown in FIG. That is, when the hooking position of the lower link frame 4 is set to the front side, the seat cushion position is high, and the backrest stands up. When the hooking position is set to the rear side, the seatcloth position is low and the backrest like a beach chair. It will be in the form of falling back. As described above, the backrest frame 5 is tilted backward or erected forward, thereby providing a reclining function.

At the time of folding and storage, the seat cushion portion 6 is separated from the backrest frame 5, and the backrest frame 5 is pulled out from the connection receiving portion 13 to separate the backrest frame 5, so that the whole is compactly folded. You can do it.

In the first embodiment, particularly, as shown in FIG. 6, the backrest frame 5 is not provided with a cushion connecting portion, and the seatcloth 6a is directly connected to the backrest frame 5 so as not to be separated. May be provided.

<Second Embodiment> FIG. 7 shows a second embodiment of the present invention. The second embodiment basically has a reclining function similarly to the first embodiment. (The same reference numerals denote the same structures, and a detailed description of the structures will be omitted. Hereinafter, the same applies to the third and fourth embodiments). It is divided into a reclining part. That is, the seat cloth 6b is adhered only to the upper link frame 3, and the backrest frame 5
The backrest cloth 55 is adhered to a.

Therefore, as in the first embodiment, by separating the backrest portion (backrest frame 5a), the whole can be folded compactly, and at the same time, the back position can be adjusted by adjusting the connection position of the lower link frame 4. The leaning angle can be changed.

<Third Embodiment> A third embodiment is shown in FIG.
As shown in FIG. 9, the front end portion of the backrest frame 5b is foldably connected to the rear end portion of the front leg frame 1,
The connecting mechanism 55 is in a state where the side rod end face 56 of the backrest frame can be brought into contact with the rear end face 15 of the side rod part of the front leg frame 1 in particular. And the backrest frame 5 is held so that the backrest frame 5b can be bent forward.

Therefore, when used, the backrest frame 5b
Is rotated backward to hold the backrest frame 5b in a state where the both end surfaces 15 and 56 are abutted, and the backrest frame 5b is folded forward for storage.
Instead of the rear end surface of the front leg frame 1, the backrest frame 5b may be connected to the rear end surface of the upper link rod 3 by abutting.

<Fourth Embodiment> FIG. 10 shows a fourth embodiment of the present invention. In this embodiment, the connection structure of the backrest frame 5c is changed.
In particular, the side rod part 51 is attached to the side rod part 12 at the pivotal connection point between the side rod part 12 of the front leg frame 1 and the side rod part 32 of the upper link frame 3 and the upper link frame 3 is provided with a hooking lever 57 which is pivotally connected to the side rod portion 32, further extends downward from the pivoted portion, and can be hooked on the receiving shaft portion 16 of the front leg frame.

In use, the hook lever 57 is hung on the receiving shaft portion 16 to prevent the backrest frame 5c from rotating forward, and to be attached to the side rod portion 12 of the front leg frame 1. The backrest frame 5 is prevented from rotating backward.
c is in a stable state so that reclining can be used. It will have a reclining function.

When the backrest frame 5c is folded and stored, when the hook lever 57 of the backrest frame 5c is disengaged from the shaft receiving portion 16, the connection between the backrest frame 5c and the front leg frame 1 is released, and the backrest frame 5 becomes independent. The upper link frame 3 can be turned around the pivotal connection with the upper link frame, so that the upper link frame 3 is simply pushed down,
If the backrest frame 5c is bent forward, it can be easily folded.

In the first embodiment of the present invention, a link rod is used instead of the upper link frame 3, and the front horizontal rod 3
1 may be provided between the upper ends of the side rod portions 22 of the rear leg frame 2 to form a frame-shaped frame as a whole, or the lower link frame may be formed as a link rod instead of having a U-shape.
The connection / disconnection structure with the front leg frame can be arbitrarily determined as long as the connection position can be changed.

Further, in each of the above-described embodiments, the rear end portion of the upper link frame 3 may be extended rearward to form a connecting portion of the backrest frame. In this case, the angle between the sitting portion and the backrest portion is constant. Therefore, reclining effect cannot be expected. In order to perform reclining, it is preferable to provide a front horizontal rod portion 31 on which the cushion is wound on the rear leg frame.

[0029]

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 backrest portion is made detachable so that the folding can be made compact and the folding operation is facilitated.

[Brief description of the drawings]

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

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

FIG. 3 is an explanatory view (side sectional view) of the reclining function.

FIG. 4 is an overall perspective view immediately before the folding (backrest separated state).

FIG. 5 is a side view of the folded state.

FIG. 6 is a perspective view of a modification of the first embodiment.

FIG. 7 is an overall perspective view of a second embodiment of the present invention.

FIG. 8 is an overall perspective view of a third embodiment of the present invention.

FIG. 9 is an enlarged view of the main part.

FIG. 10 is an overall perspective view of a fourth embodiment of the present invention.

FIG. 11 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 Connection receiving part 14 Hook receiving part 15 Side rod rear end face 16 Receiving shaft part 2 Rear leg frame 21 Lower side rod part 22 Side rod part 3 Upper link frame 31 Front horizontal 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, 5a, 5b, 5c backrest frame 51 side rod part 52 top rod part 53 seat cloth Connecting part 54 Inserting rod 55 Backrest cloth 56 Side rod part front end face 57 Hook lever 6 Seat cloth part 61, 6a Seat cloth 62 Connecting horizontal rod 63 Pillow part

Claims (8)

[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. It is crossed at an intermediate point, and the side rods located at the front and rear at the upper and lower positions of the crossing part are connected by link rods, and seats are placed between the upper link rod and the horizontal rods positioned between the left and right side rods. A swingable folding chair having a backrest frame formed in a U-shape with a downward opening at the rear end of the upper link rod or the rear end of the side rod of the front leg frame. A folding chair characterized in that its parts are detachably connected. 2. The rear end portion of the upper link rod or the rear end portion of the side rod portion of the front leg frame is formed in a cylindrical shape, and the end portion of the side rod portion of the backrest frame formed in a U-shape with a lower opening is formed in the cylindrical shape. The folding chair according to claim 1, wherein the folding chair is inserted into the shape portion. 3. A seat cloth is stretched between a top bar of a backrest frame formed in a U-shape with a lower opening and a horizontal bar positioned between left and right side bars of a front end portion of a rear leg frame. The folding chair according to claim 1, further comprising a seat cloth detachably attached to the backrest frame. 4. The seat cushion is stretched in a state of being bent between the front and rear lateral rod portions positioned between the left and right side rod portions, and one of the connecting positions of the lower link rod is provided so as to be adjustable. 3. The folding chair according to any one of 3. 5. A lower link rod is formed in a U-shaped frame, an open end is pivotally connected to a side rod part of a rear leg frame, and a hook receiving part is provided in a lower part of the side rod part of the front leg frame in multiple stages. The folding chair according to claim 4, wherein the folding chair is formed so that the front rod portion of the lower link frame can be selectively hooked and released from the hook receiving portion. 6. A front leg frame and a rear leg frame provided with a lower side rod portion and a left and right side rod portion, so that the side rod portion of one frame is located inside the side rod portion of the other frame. It is crossed at an intermediate point, and the side rods located at the front and rear at the upper and lower positions of the crossing part are connected by link rods, and seats are placed between the upper link rod and the horizontal rods positioned between the left and right side rods. A swingable folding chair having a backrest frame formed in a U-shape with a downward opening at the rear end of the upper link rod or the rear end of the side rod of the front leg frame. The folding chair is characterized in that the backrest frame is held at the backrest position and is foldably provided on the seat surface side. 7. The backrest frame is held at the backrest position with the side end portion of the backrest frame abutting against the rear end portion of the upper link rod or the rear end surface of the side rod portion of the front leg frame. Item 7. The folding chair according to Item 6. 8. A side rod portion of the backrest frame is pivotally connected to the upper link rod along with a side rod portion of the upper link rod of the front leg frame, and both side rod portions near the pivot point are attached. 7. The folding chair according to claim 6, further comprising an attachment / detachment mechanism capable of fixing and detaching the both-side rod portions at the position where the arm is provided.