Foldable chair

Abstract

To provide a foldable chair of a new structure excellent in maintainability, in which a seat can be detached from a frame body easily.SOLUTION: A foldable chair 1 includes a seat part 2 and a backrest part 3, and can be switched from a use state to a folded state. The seat part 2 includes right and left seat part side edge frames 21 and a seat part sheet 23 put between these frames. The backrest part 3 includes right and left backrest part side edge frames 31 and a backrest part sheet 33 put between these frames. These sheets are connected to each other. In the use state, the seat part sheet 23 is attached so as to be drawn out forward along the right and left seat part side edge frames 21, and the backrest part sheet 33 is attached so as to be drawn out upward along the right and left backrest part side edge frames 31. In the folded state, these sheets can be drawn out in the same direction / mounted from the same direction.SELECTED DRAWING: Figure 1A

Description

[Technical field]

[0001] The present invention relates to a folding chair, and more particularly to a folding chair including a frame body as a skeleton and a seat attached to the frame body as a part that supports the body. [Background technology]

[0002] In recent years, with the boom in outdoor activities such as camping, there has been an increasing need for foldable chairs that are easy to carry to the desired location for use and that include a foldable frame body as the skeleton, a seat that supports the body and is made of lightweight cloth or leather and is fixed across the frames that make up the frame body, and are designed to be easy to carry to the desired location for use.Various types of foldable chairs with various ingenious features have been proposed (for example, see Patent Documents 1 and 2).

[0003] The folding chair (folding deck chair) disclosed in Patent Document 1 comprises a folding frame body (frame) assembled by connecting a plurality of mutually insertable and removable tubes and a plurality of connectors (6) each having holes for inserting the tubes, and a seat (body support section 8) on which a person lies down. A lower fitting section (82) through which the lower end connector (6') passes in the left-right direction is formed in part of the seat, and the seat is attached to the frame body by assembling the lower end connector (6') passed through the lower fitting section (82) as part of the frame body, and conversely, the seat can be removed from the frame body by removing the lower end connector (6') from the frame body and removing the lower end connector (6') from the lower fitting section (82).

[0004] The folding chair disclosed in Patent Document 2 comprises a folding frame body (frame) including legs that extend above the seat surface at the four corners, and a seat (seat material 3) on which a person sits. This seat is provided with seat rings with holes on the inside at the four corners of the seat, and the seat is attached to the frame body by passing the seat rings vertically through the legs from above, and the seat can be removed from the frame body by moving the seat rings upward relative to the legs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3064713 [Patent Document 2] Japanese Patent Application Publication No. 6-197821 Summary of the Invention [Problem to be solved by the invention]

[0006] In this way, in a folding chair that has a folding frame body as a skeleton and uses a seat as a part that supports the body, if the seat can be easily removed from the frame body as in the folding chairs disclosed in Patent Documents 1 and 2, maintenance can be facilitated when a problem occurs in the frame body or the seat. There is always a demand for a folding chair with a new structure that allows the seat to be easily removed from the frame body and is easy to maintain.

[0007] In view of such demands, an object of the present invention is to provide a folding chair with a new structure in which the seat can be easily removed from the frame body and which is easy to maintain. [Means for solving the problem]

[0008] In order to solve the above problems, the folding chair of the present invention has a seat, a backrest, front legs and rear legs, and can be switched from a usable state in which the backrest rises from the rear of the seat and can stand on its own using the front and rear legs to a folded state in which the backrest is stacked on top of the seat. In the folding chair according to the present invention, the seat portion includes left and right seat portion side edge frames that extend in the front-rear direction when in use, and a seat portion sheet that is bridged between the seat portion side edge frames, The backrest portion includes left and right backrest side edge frames that extend vertically in a used state, and a backrest sheet that is bridged between the backrest side edge frames, The seat and backrest are partly connected to each other. The seat sheet is attached to the left and right seat side edge frames so as to be able to be pulled forward along the left and right seat side edge frames, The backrest sheet is attached to the left and right backrest side edge frames so as to be able to be pulled upward along the backrest side edge frames, In the folded state, the seat sheet and the backrest sheet can be pulled out in the same direction from the front end of the seat and the upper end of the backrest located on the same side, and these sheets can be attached from the same direction. It is characterized by:

[0009] In the folding chair according to the present invention, the backrest sheet is provided with a cylindrical sheet portion that is bridged so as to enclose the left and right backrest side edge frames and has an open upper end and a open lower end, The left and right side edge frames of the backrest are inserted into the cylindrical seat portion through the lower end opening of the cylindrical seat portion in a removable manner, It is preferable that the lower edge of the front sheet portion of the tubular sheet portion extends downwardly and is connected to the rear edge of the seat cushion sheet.

[0010] In the folding chair according to the present invention, the backrest portion includes a backrest upper edge frame that is bridged between the left and right backrest side edge frames and extends in the left-right direction, The backrest sheet is provided with a belt-shaped hanging piece hung on the upper edge frame of the backrest, It is preferable that the hanging piece has a front end attached to the front portion of the upper end of the tubular sheet portion, and a rear end attached to the rear portion of the upper end of the tubular sheet portion.

[0011] In addition, in the folding chair according to the present invention, the seat portion includes a seat portion main body portion connected to the cylindrical seat portion of the backrest seat, and a seat portion cylindrical portion formed along the left and right side edges of the seat portion main body portion and having openings at the front and rear ends, The left and right seat side edge frames are preferably inserted into the left and right seat sheet cylindrical portions, respectively, through their rear end openings in a removable manner.

[0012] In the folding chair according to the present invention, the front legs are provided with left and right front leg side edge frames extending in the up-down direction when in use, A connecting portion is formed at a mid-way portion in the longitudinal direction of the left and right seat side edge frames of the seat, in which the left and right front leg side edge frames are connected in a rotatable manner by left and right connecting devices attached from the outside in the left and right direction, The left and right cylindrical portions of the seat are provided with openings through which the connectors are passed, It is preferable that when the connecting member is loosened and the connecting portion is removed from the seat side edge frame, a state is created in which the seat sheet can be pulled out from the seat side edge frame.

[0013] In the folding chair according to the present invention, it is preferable that a pull tab is attached to the front edge of the seat body of the seat.

[0014] In addition, the folding chair according to the present invention further includes left and right armrests, The rear legs are provided with left and right rear leg side edge frames extending in the vertical direction, The left and right rear leg side edge frames are rotatably connected to lower ends of the left and right backrest side edge frames of the backrest portion via link members at intermediate positions in the longitudinal direction, Each of the left and right armrests includes an armrest frame extending in the front-rear direction and a bracket attached to the underside of the armrest frame. The left and right armrest frames are pivotally connected at their rear ends to intermediate positions on the lower ends of the left and right backrest side edge frames, The left and right brackets are pivotally connected to upper ends of the left and right front leg side edge frames and upper ends of the left and right rear leg side edge frames, respectively; The lower ends of the left and right backrest side edge frames are connected to the rear ends of the left and right seat side edge frames via the left and right connecting parts, respectively; It is preferable that the backrest portion is rotatable about the left and right connecting portions from a position in the usage state to a position in the folded state. Effect of the Invention

[0015] According to the present invention, it is possible to provide a folding chair with a new structure in which the seat can be easily removed from the frame body and which is easy to maintain. [Brief description of the drawings]

[0016] [Figure 1A] FIG. 2 is a perspective view of a folding chair in use according to the embodiment. [Figure 1B] FIG. 1B is a side view of FIG. 1A. [Figure 1C] 1B is a perspective view of a frame body in the state of FIG. 1A. [Figure 2A] FIG. 2 is a perspective view of a folding chair in a folded state according to an embodiment. [Figure 2B] FIG. 2B is a side view of FIG. 2A. [Figure 2C] FIG. 2B is a perspective view of the frame body in the state of FIG. 2A. [Figure 3A]FIG. 1B is a front view of the folding chair seat of FIG. 1A in an unfolded state. [Figure 3B] FIG. 3B is a rear view of FIG. 3A. [Figure 4A] FIG. 2 is a top view of the folding chair in a folded position before the seat is removed. [Figure 4B] FIG. 4B is an exploded view showing a state in which the sheet has been removed from the state shown in FIG. 4A. [Figure 5A] FIG. 1B is a six-view diagram of the folding chair in use in FIG. 1A. [Figure 5B] 1C in a six-view diagram of the frame body of the folding chair in the used state. FIG. [Figure 6A] FIG. 2B is a six-view diagram of the folding chair in the folded state of FIG. 2A. [Figure 6B] FIG. 2D is a six-view diagram of the frame body of the folding chair in the folded state of FIG. 2C. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] FIG. 1A is a perspective view of the folding chair 1 in the use state according to the embodiment, FIG. 1B is a side view thereof, and FIG. 1C is a perspective view of the frame body 1A in the use state. FIG. 2A is a perspective view of the folding chair 1 in the folded state according to the embodiment, FIG. 2B is a side view thereof, and FIG. 2C is a perspective view of the frame body 1A in the use state. FIG. 3A is a front view of the seat 1B for the folding chair 1 in the unfolded state, and FIG. 3B is a rear view thereof. The folding chair 1 will be described below with reference to these figures. In this specification, the directions that are orthogonal to each other when viewed from the user when the user sits facing directly ahead along a horizontal plane in the use state will be described as the left-right direction X, the front-back direction Y, and the up-down direction Z, respectively.

[0018] (Overall configuration of folding chair 1) As shown in Figs. 1A to 1C and 2A to 2C, the folding chair 1 (hereinafter, simply referred to as "chair 1") includes a seat 2 on which a user sits, a backrest 3 on which the user leans back, front legs 4 that support the chair 1 from the front when the chair 1 is made to stand on its own, rear legs 5 that support the chair 1 from the rear when the chair 1 is made to stand on its own, and left and right armrests 6 on which the user rests his / her elbows. The chair 1 can be switched from a use state in which the backrest 3 rises from the rear of the seat 2 and can stand on its own with the front legs 4 and rear legs 5 as shown in Fig. 1B to a folded state in which the backrest 3 is placed on the seat 2 as shown in Fig. 2B. The chair 1 is composed of a frame body 1A in which a plurality of metal frames are combined in a deformable manner, and a seat 1B attached to the frame body 1A.

[0019] 1A to 1C, the frame body 1A is made up of a plurality of straight or curved, elongated metal frame members that form the skeleton of the seat section 2, the skeleton of the backrest section 3, the skeleton of the front legs 4, the skeleton of the rear legs 5, and the skeletons of the left and right armrest sections 6. In the frame body 1A, the skeletons of each section are related to each other by connectors, link members, brackets, etc. and are joined together so as to be relatively rotatable around a rotation axis extending in the left-right direction X.

[0020] Seat 1B is formed from a sheet-like material selected from materials such as cloth, vinyl, leather, etc., and is bridged between the side edge frames from seat portion 2 to backrest portion 3 as shown in Figures 1A, 3A, and 3B, forming the seating surface of seat portion 2 and the backrest surface of backrest portion 3.

[0021] (Components of Folding Chair 1) The configuration of each part in the usage state will be described in detail below with reference to FIGS. 1A to 1C, 3A, and 3B.

[0022] The seat 2 includes, as part of the frame body 1A, left and right seat side edge frames 21 extending in the front-rear direction Y, and a seat rear edge frame 22 extending in the left-right direction X and spanning between the rear ends of the left and right seat side edge frames 21. The left and right seat side edge frames 21 and the seat rear edge frame 22 form the framework of the gate-shaped seat 2. The seat 2 also includes, as part of the seat 1B, a seat sheet 23 having a seating surface spanning between the left and right seat side edge frames 21. The seat sheet 23 is connected to a cylindrical seat portion 33a of the backrest seat 33 described later via a waist portion 33b, and includes a seat sheet main body portion 23a with the upper surface serving as a seating surface, a seat sheet cylindrical portion 23b formed along the left and right side edges of the seat sheet main body portion 23a and having openings at the front and rear ends, and a pull tab 23c attached to the front edge portion of the seat sheet main body portion 23a. The left and right seat sheet cylindrical portions 23b are formed with openings through which a connector 71 made of, for example, a bolt and a cylindrical spacer is passed. The left and right seat sheet side edge frames 21 are inserted and removed from the rear end openings of the left and right seat sheet cylindrical portions 23b, respectively. As a result, the seat sheet 23 is attached to the left and right seat sheet side edge frames 21 so that it can be pulled forward along the left and right seat sheet side edge frames 21. Left and right decorative screws 72 are attached from the outside in the left-right direction to the front end portions of the left and right seat side edge frames 21 for the purpose of improving the design. A connecting portion is formed in a longitudinal midpoint of the left and right seat side edge frames 21, in which the left and right front leg side edge frames 41 of the front legs 4 described below are rotatably connected by left and right connectors 71 attached from the outside in the left-right direction. When the connectors 71 are loosened to remove the connecting portion from the seat side edge frames 21 and the decorative screws 72 are removed from the seat side edge frames 21, the seat sheet 23 can be pulled out from the seat side edge frames 21.

[0023] The backrest 3, as a part of the frame body 1A, includes left and right backrest side edge frames 31 that extend in the up-down direction Z in the use state, and a backrest upper edge frame 32 that extends in the left-right direction X and is bridged between the upper ends of the left and right backrest side edge frames 31. The left and right backrest side edge frames 31 and the backrest upper edge frame 32 form the framework of the gate-shaped backrest 3. The lower ends of the left and right backrest side edge frames 31 are rotatably connected to the rear ends of the left and right seat side edge frames 21 via link members 73 that are made of metal plates and have rotation shafts at both ends as left and right connecting parts. This allows the backrest 3 to rotate from a position in use to a position in a folded state, centered on the left and right connecting parts. The backrest 3, as a part of the seat 1B, includes a backrest sheet 33 having a backrest surface spanning between the left and right backrest side edge frames 31. The backrest sheet 33 includes a tubular sheet portion 33a with its front surface serving as the backrest surface, spanning the left and right backrest side edge frames 31 so as to envelop them, and having open upper and lower ends, a waist portion 33b extending downward from the lower edge of the front seat part of the tubular sheet portion 33a and connected to the rear edge of the sitting portion sheet 23, and a belt-like hanging piece 33c hung from the backrest upper edge frame 32. The left and right backrest side edge frames 31 and the backrest upper edge frame 32 are inserted and removed through the cylindrical sheet portion 33a from its lower end opening, and when the upper ends of the left and right backrest side edge frames 31 and the backrest upper edge frame 32 are exposed above the cylindrical sheet portion 33a. As a result, the backrest sheet 33 is attached to the left and right backrest side edge frames 31 so that it can be pulled upward along the left and right backrest side edge frames 31. The hanging piece 33c has a front end attached to the front part of the upper end of the cylindrical sheet portion 33a and a rear end attached to the rear part of the upper end of the cylindrical sheet portion, and supports the cylindrical sheet portion 33a so that it does not fall along the left and right backrest side edge frames 31.

[0024] The front leg 4, as a part of the frame body 1A, includes, in a use state, left and right front leg side edge frames 41 extending in the up-down direction Z, a front leg lower edge frame 42 extending in the left-right direction X and spanning between the lower ends of the left and right front leg side edge frames 41, and a front leg reinforcement frame 43 spanning between the middle positions of the left and right front leg side edge frames 41 and extending in the left-right direction X. The left and right front leg side edge frames 41, the front leg lower edge frame 42, and the front leg reinforcement frame 43 form the framework of the front leg 4 having a gate-like shape with a beam spanning between them. As described above, the left and right front leg side edge frames 41 are connected to each other in a rotatable manner by the connector 71 at left and right connecting parts formed between the left and right seat side edge frames 21 of the seat 2 at their midpoints in the length direction. As a result, the front leg 4 can be rotated from a use state position to a folded state position around the left and right connecting parts. Additionally, the upper ends of the left and right front leg side edge frames 41 are each rotatably connected to a bracket 62 of the armrest portion 6, which will be described later.

[0025] The rear legs 5, as part of the frame body 1A, are provided with left and right rear leg side edge frames 51 extending in the up-down direction Z, and a rear leg lower edge frame 52 extending in the left-right direction X and bridged between the lower ends of the left and right rear leg side edge frames 51 in the use state. The left and right rear leg side edge frames 51 and the rear leg lower edge frame 52 form the skeleton of the rear legs 5 having a gate-like shape. The left and right rear leg side edge frames 51 are rotatably connected at their midpoints in the length direction to the lower ends of the left and right backrest side edge frames 31 of the backrest 3 via link members 74 made of metal plate material and having rotation shafts at both ends. The upper ends of the left and right rear leg side edge frames 51 are rotatably connected to brackets 62 of the armrests 6 described later.

[0026] The left and right armrests 6, as part of the frame body 1A, include left and right armrest frames 61 extending in the front-rear direction Y in the use state, and brackets 62 made of metal plates attached to the undersides of the left and right armrest frames 61. The left and right armrest frames 61 are made of rectangular parallelepiped metal plates, and a seat or cushion is wrapped around them as necessary. The left and right armrest frames 61 are rotatably connected at their rear ends to the middle parts of the lower ends of the left and right backrest side edge frames 31. As described above, the left and right brackets 62 are rotatably connected to the upper ends of the left and right front leg side edge frames 41 and the upper ends of the left and right rear leg side edge frames 51, respectively, so that the front legs 4 and the rear legs 5 can be rotatably moved from the use state position to the folded state position relative to the left and right brackets 62.

[0027] In the chair 1 thus configured, the seat 2, the backrest 3, the front legs 4, the rear legs 5, and the left and right armrests 6 are connected to each other by the bracket 62, the connector 71, and the link members 73, 74 having rotational shafts at both ends so that they can rotate relative to each other in an interlocking manner. Therefore, by performing a folding operation so that the front end of the seat 2 and the upper end of the backrest 3 are brought closer to each other from the self-supporting use state shown in Fig. 1B, the front legs 4, the rear legs 5, and the left and right armrests 6 are also folded in an interlocking manner, and the chair can be switched to the folded state shown in Fig. 2B. Conversely, by performing an opening operation so that the front end of the seat 2 and the upper end of the backrest 3 are brought farther away from each other from the folded state, the front legs 4, the rear legs 5, and the left and right armrests 6 are also opened in an interlocking manner, and the chair can be switched to the use state. Furthermore, when it is desired to replace the seat 1B of the chair 1, the seat 1B can be easily removed from the frame body 1A by folding the chair 1 and removing the connectors 71 and the decorative screws 72. These will be described in detail below.

[0028] (Switching operation of folding chair 1) 1B and 2B, the switching operation of the chair 1 will be described. For the sake of convenience, the switching operation will be described on the assumption that the seat 2 is used as a reference and the position of the seat 2 is not moved.

[0029] In a folding operation for switching the chair 1 from the in-use state to the folded state, a force is applied to the chair 1 in the in-use state shown in Fig. 1B to move the upper end of the backrest 3 closer to the front end of the seat 2. Then, since the lower end of the backrest 3 is connected to the rear end of the seat 2 via the link member 73, the backrest 3 rotates forward around the vicinity of the lower end as the axis of rotation. Accordingly, the left and right armrests 6, which are rotatably connected to the intermediate portion on the lower end side of the backrest 3, are pushed by the backrest 3 and move forward while rotating relatively to the backrest 3. The front legs 4 are rotatably connected to the brackets 62 of the armrests 6, and the front legs 4 are rotatably connected at their intermediate portions to the intermediate portion of the seat 2 by the connectors 71. Therefore, as the armrest 6 moves forward, the upper end of the front leg 4 is pushed forward by the armrest 6, but since the intermediate portion is connected to the intermediate portion of the seat 2, the lower end of the front leg 4 rotates around the intermediate portion connected to the seat 2 to move rearward. The rear leg 5 is rotatably connected to the bracket 62 of the armrest 6, and the intermediate portion of the rear leg 5 is rotatably connected to a portion near the lower end of the backrest 3 via a link member 74. As the armrest 6 moves forward, the upper end of the rear leg 5 is pushed forward by the armrest 6, but since the intermediate portion is connected to the portion near the lower end of the backrest 3, the lower end of the rear leg 5 rotates around the intermediate portion connected to the backrest 3 to move rearward. As a result, the chair 1 switches to a folded state in which each portion is overlapped along a plane as shown in FIG. 2B.

[0030] On the other hand, in an opening operation for switching the chair 1 from the folded state to the usable state, a force (opening force) is applied to the chair 1 in the folded state shown in Fig. 2B to move the upper end of the backrest 3 away from the front end of the seat 2. This causes a force opposite to that of the folding operation to act on each part, causing each part to rotate or move in the opposite direction to that of the folding operation, switching the chair 1 to the usable state shown in Fig. 1B.

[0031] (Replacing Seat 1B) Fig. 4A is a plan view of the chair 1 in a folded state before the seat 1B is removed, and Fig. 4B is an exploded view showing the state after the seat is removed. The replacement work of the seat 1B will be explained mainly with reference to Fig. 4A and Fig. 4B. In the folded state, the front end of the seat 2 and the upper end of the backrest 3 are located on the same side (upper side in Fig. 4A and Fig. 4B), so that the seat sheet 23 and the backrest sheet 33 can be pulled out in the same direction (upper in Fig. 4A and Fig. 4B) from the front end of the seat 2 and the upper end of the backrest 3, and these sheets 23, 33 can be attached from the same direction (upper in Fig. 4A and Fig. 4B).

[0032] In replacing the seat 1B, first, the chair 1 is folded as shown in FIG. 4A. Next, the connector 71 is loosened to remove the connector from the seat side edge frame 21, and the decorative screw 72 is removed from the seat side edge frame 21. Next, when a force is applied to shift the seat 1B to one side (upward in FIG. 4A) by, for example, pulling the pull tab 23c, the seat sheet 23 slides to one side (upward in FIG. 4A) relative to the seat side edge frame 21, and the backrest sheet 33 slides to one side (upward in FIG. 4A) relative to the backrest side edge frame 31, and the seat 1B can be removed from the frame body 1A as shown in FIG. 4B. Next, the seat 1B is replaced with another seat 1B, and the seat 1B is attached to the frame body 1A in the reverse order to the operation of removing the other seat 1B, and the connector 71 and the decorative screw 72 are attached to the seat side edge frame 21. This completes the replacement of the sheet 1B.

[0033] 5A, 5B, 6A, and 6B are six-sided views of the folding chair 1 in use, the frame body 1A of the folding chair 1 in use, the folding chair 1 in a folded state, and the frame body 1A of the folding chair 1 in a folded state, respectively. Each of the six-sided views shows a front view in (a), a left side view in (b), a right side view in (c), a rear view in (d), a plan view in (e), a bottom view in (f), and a perspective view seen from above in (g). The configuration of the chair 1 according to the embodiment has been described above, but by referring to these six views, this embodiment can be more clearly understood.

[0034] (Action and effect) In the chair 1 of the embodiment, the seat 2 includes left and right seat side edge frames 21 and a seat sheet 23 that is suspended between these seat side edge frames 21, and the backrest 3 includes left and right backrest side edge frames 31 and a backrest sheet 33 that is suspended between these backrest side edge frames 31. The seat sheet 23 and the backrest sheet 33 are partially connected to each other, and the seat sheet 23 is attached to the seat side edge frames 21 so as to be able to be pulled out along the left and right seat side edge frames 21, and the backrest sheet 33 is attached to the backrest side edge frames 31 so as to be able to be pulled out along the left and right backrest side edge frames 31. In the folded state, the seat sheet 23 and the backrest sheet 33 can be pulled out in the same direction from the end of the seat 2 and the end of the backrest 3 located on the same side, and these sheets 22, 33 can be attached from the same direction. Therefore, the chair 1 is a folding chair with a new structure that is easy to maintain, since the seat 1B, to which the seats 22, 33 are attached, can be easily removed from the frame body 1A.

[0035] In addition, in the chair 1, the backrest sheet 33 is provided with a cylindrical sheet portion 33a that is bridged so as to enclose the left and right backrest side edge frames 31 and has upper and lower open ends, and the left and right backrest side edge frames 31 are inserted and removed through the cylindrical sheet portion 33a from its lower end opening. With this configuration, the backrest sheet 33 can be easily pulled out from the left and right backrest side edge frames 31. The cylindrical sheet portion 33a is connected to the seat sheet 23 at the waist portion 33b, which is the front seat portion. That is, when the chair 1 is folded, no frame or the like is sandwiched between the backrest sheet 33 and the seat sheet 23. Therefore, according to the chair 1, even if the seat 1B is moved in a direction to remove it from the frame body 1A, the seat 1B is not interfered with by the frame or the like, and the seat 1B can be easily removed from the frame body 1A.

[0036] In addition, in the chair 1, the backrest 3 includes a backrest upper edge frame 32 that is bridged between the left and right backrest side edge frames 31, and a belt-shaped hanging piece 33c that is hung from the backrest upper edge frame 32 and has a front end attached to the front part of the upper end of the cylindrical sheet part 33a and a rear end attached to the rear part of the upper end of the cylindrical sheet part 33a. That is, even if the backrest sheet 33 is attached so that the left and right backrest side edge frames 31 pass through the cylindrical sheet part 33a, the hanging piece 33c is hung from the backrest upper edge frame 32 while securing the opening size of the upper end of the cylindrical sheet part 33a, so that the cylindrical sheet part 33a does not fall below a predetermined height position. With this configuration, the cylindrical sheet part 33a of the backrest sheet 33 can form a backrest surface at an appropriate position.

[0037] In the chair 1, the seat sheet 23 includes a seat sheet main body 23a connected to the backrest sheet 33, and a seat sheet tubular portion 23b formed along the left and right side edges of the seat sheet main body 23a and having openings at the front and rear ends, and the left and right seat side edge frames 21 are inserted into the left and right seat sheet tubular portions 23b from their rear end openings in a removable manner. With this configuration, the seat sheet 23 can be attached to the seat side edge frames 21 in a removable manner, and the seat sheet 23 can form a seat surface that is firmly supported by the seat side edge frames 21 and on which the user can sit comfortably.

[0038] In addition, in the chair 1, the front legs 4 include left and right front leg side edge frames 41, and a connecting portion is formed at a midpoint in the length direction of the left and right seat side edge frames 21 of the seat 2, in which the left and right front leg side edge frames are connected in a rotatable state by left and right connecting members 71 attached from the outside in the left and right direction. Openings through which the connecting members 71 pass are formed in the left and right seat sheet tubular portions 23b of the seat sheet 23, and when the connecting members 71 are loosened and the connecting members are removed from the seat side edge frames 21, the seat sheet 23 can be pulled out from the seat side edge frames 21. With this configuration, the seat sheet 23 can be easily removed by simply loosening the connecting members 71 and removing the connecting members.

[0039] In addition, in the chair 1, a handle 23c is attached to the front edge portion of the seat body 23a of the seat 23, so that the seat 23 can be conveniently held by using the handle 23c when carrying it in the folded state or when replacing the seat 1B.

[0040] The chair 1 is also provided with left and right armrests 6, the rear legs 5 with left and right rear leg side edge frames 51, which are rotatably connected to lower ends of the left and right backrest side edge frames 31 of the backrest 3 at midpoints in the longitudinal direction via link members 74, and the left and right armrests 6 each include an armrest frame 61 extending in the front-rear direction, and left and right brackets 62 attached to the undersides of the armrest frames 61, and the rear ends of the left and right armrest frames are The left and right brackets 62 are rotatably connected to the middle part of the lower end of the backrest side edge frame 31, the upper ends of the left and right front leg side edge frames 41 and the upper ends of the left and right rear leg side edge frames 51 are rotatably connected to the left and right brackets 62, the lower ends of the left and right backrest side edge frames 31 are connected to the rear ends of the left and right seat side edge frames 21 via link members 73 constituting the left and right connecting parts, and the backrest 3 can be rotated from a position in use to a position in a folded state around the left and right connecting parts. That is, according to the chair 1, the seat 2, the backrest 3, the front legs 4, the rear legs 5, and the armrests 6 are connected to rotate in conjunction with each other, so that by folding or opening the backrest 3 relative to the seat 2, the front legs 4, the rear legs 5, and the armrests 6 can also be folded or opened in conjunction with each other.

[0041] (Other forms) Although the present invention has been described based on the above embodiment, the present invention is not limited to the above embodiment. The present invention can be embodied in various forms without departing from the spirit of the present invention, and for example, the following modifications are also possible.

[0042] (1) The numbers, materials, shapes, positions, sizes, and the like of the components described in the above embodiments are merely examples and may be changed without impairing the effects of the present invention.

[0043] (2) In the above embodiment, the frame body 1A is mainly composed of a metal frame, but the present invention is not limited to this. For example, the frame body may be composed of a high-strength plastic frame or a high-strength wooden frame.

[0044] (3) In the above embodiment, each part of the frame body 1A other than the armrest 6 has a gate-like shape with left and right side edge frames and edge frames that bridge the ends of the frames, but the present invention is not limited to this. Each part of the frame body 1A other than the armrest 6 may be made of appropriate frame material or plate material as long as the strength of the left and right side edge frames is ensured. [Explanation of symbols]

[0045] 1...1 Folding chair (chair), 1A...frame body, 1B...seat, 2...seat portion, 3...backrest portion, 4...front legs, 5...rear legs, 6...armrest portion, 21...seat side edge frame, 22...seat rear edge frame, 23...seat portion, 23a...seat portion main body portion, 23b...seat portion cylindrical portion, 23c...handle, 31...backrest side edge frame, 32...backrest upper edge frame, 33...backrest seat seat, 33a...tubular seat portion, 33b...waist portion, 33c...hanging piece, 41...front leg side edge frame, 42...front leg lower edge frame, 43...front leg reinforcement frame, 51...rear leg side edge frame, 52...rear leg lower edge frame, 61...armrest frame, 62...bracket, 71...connector, 72...decorative screw, 73...link member, 74...link member, X...left-right direction, Y...front-rear direction, Z...up-down direction

Claims

1. The seat includes a seat portion, a backrest portion, front legs, and rear legs, and is switchable from a usage state in which the backrest portion rises from a rear portion of the seat portion and can stand on its own using the front legs and the rear legs to a folded state in which the backrest portion is stacked on the seat portion, The seat portion includes left and right seat portion side edge frames extending in a front-rear direction in the use state, and a seat portion sheet spanning between the seat portion side edge frames, The backrest is a folding chair including left and right backrest side edge frames extending in a vertical direction in the use state, and a backrest sheet spanning between the backrest side edge frames, The seat portion and the backrest portion are partially connected to each other, The seat sheet is attached to the left and right seat side edge frames so as to be able to be pulled forward along the left and right seat side edge frames, the backrest sheet is attached to the left and right backrest side edge frames so as to be able to be pulled upward along the left and right backrest side edge frames, This folding chair is characterized in that, in the folded state, the seat sheet and the backrest sheet can be pulled out in the same direction from the front end of the seat and the upper end of the backrest, which are located on the same side, and these sheets can be attached from the same direction.

2. 2. The folding chair according to claim 1, The backrest sheet is provided with a cylindrical sheet portion that is bridged so as to enclose the left and right backrest side edge frames and has an upper end and a lower end that are open, The left and right side edge frames of the backrest are inserted into the cylindrical seat portion through a lower end opening of the cylindrical seat portion in a removable manner, A folding chair in which the lower edge of the front seat portion of the tubular seat portion extends downward and is connected to the rear edge of the sitting portion.

3. A folding chair according to claim 2, The backrest portion includes a backrest upper edge frame extending in the left-right direction and spanning between the left and right backrest side edge frames, The backrest sheet includes a belt-shaped hanging piece that is hung on the upper edge frame of the backrest, A folding chair in which the hanging piece has a front end attached to the front portion of the upper end of the tubular seat portion and a rear end attached to the rear portion of the upper end of the tubular seat portion.

4. A folding chair according to claim 2, The seat portion is A seat body portion connected to the cylindrical seat portion of the backrest seat; A cylindrical seat portion is formed along the left and right side edges of the seat body portion, and has a front end and a rear end that are open; Equipped with The left and right seat side edge frames are inserted into the left and right seat sheet cylindrical portions from their rear end openings in a removable manner, respectively.

5. A folding chair according to claim 4, The front legs include left and right front leg side edge frames extending in a vertical direction when in use, A connecting portion is formed at a midpoint in the length direction of the left and right seat side edge frames of the seat, in which the left and right front leg side edge frames are connected in a rotatable manner by left and right connecting devices attached from the outside in the left and right direction, The left and right cylindrical portions of the seat portion are formed with openings through which the connectors are passed, When the connecting device is loosened and the connecting portion is removed from the seat side edge frame, the seat is allowed to be pulled out from the seat side edge frame.

6. A folding chair according to claim 4, A folding chair in which a handle is attached to a front edge portion of the seat body of the seat.

7. A folding chair according to any one of claims 1 to 6, In addition, it is equipped with left and right armrests, The rear legs each include left and right rear leg side edge frames extending in a vertical direction, The left and right rear leg side edge frames are rotatably connected to lower ends of the left and right backrest side edge frames of the backrest portion via link members at intermediate positions in the longitudinal direction, Each of the left and right armrests includes an armrest frame extending in the front-rear direction and a bracket attached to a lower surface of the armrest frame, The left and right armrest frames are pivotally connected at their rear ends to intermediate positions on the lower ends of the left and right backrest side edge frames, upper ends of the left and right front leg side edge frames and upper ends of the left and right rear leg side edge frames are rotatably connected to the left and right brackets, The lower end portions of the left and right backrest side edge frames are connected to the rear end portions of the left and right seat side edge frames via left and right connecting portions, respectively; The folding chair is configured so that the backrest portion is rotatable about the left and right connecting portions from the position in the use state to the position in the folded state.

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