JP2018114210A - Folding chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve storage and portability with a simple structure.SOLUTION: A folding chair includes: a seat surface plate which is formed into a plate shape, has a seat surface bending part linearly formed in a planar view, and can be folded into two with the seat surface folding part as a fulcrum; and two side surface plates which are formed into plate shapes, are arranged mutually opposite, mutually openable/closable in a perpendicular direction with respect to an extension direction of the seat surface bending part, and support the seat surface plate in an open state. When the two side surface plates are separated from each other and are in the open state, the seat surface plate opens and a seat surface having an extension area extending in the opening/closing direction with respect to upper end parts of the side surface plates is formed; when the two side surface plates in proximity to each other and are in a closed state, the seat surface plate is bent into two and folded with the seat surface bending part as a fulcrum.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a folding chair.

  Conventionally, for example, there is a chair for assisting a user to sit upright. Some of these chairs are configured to be foldable, as in Patent Document 1, for example. However, such a conventional folding chair has a relatively complicated structure for folding. In addition, the folding chair having a conventional configuration is bulky when stored or carried even in a folded state, and thus there is room for improvement in terms of storage and portability.

JP 2011-229813 A

  In view of this, a folding chair is provided that has a simple configuration and improves storage and portability.

  The folding chair of the embodiment is formed in a plate shape having a seat surface bending portion formed in a plate shape and linearly formed in a plan view, and a seat surface plate that can be bent in two with the seat surface bending portion as a fulcrum. And two side plates arranged opposite to each other and configured to be able to be opened and closed mutually in a direction perpendicular to the extending direction of the seat bending portion, and supporting the seat plate in the open state. When the two side plates are opened apart from each other, the seat plate opens to form a seating surface having an extension region extending in the opening / closing direction with respect to the upper end portion of the side plate. When the side plates approach each other and are in the closed state, the seat plate is folded in two with the seat bend portion as a fulcrum.

The perspective view which shows the folding chair of the open state by one Embodiment The left view which shows the folding chair of the open state by one Embodiment The top view which shows the folding chair of the open state by one Embodiment The bottom view which shows the folding chair of the open state by one Embodiment The front view which shows the folding chair of the open state by one Embodiment The rear view which shows the folding chair of the open state by one Embodiment The perspective view which shows the folding chair of the closed state by one Embodiment The left view which shows the folding chair of the closed state by one Embodiment The top view which shows the folding chair of the closed state by one Embodiment The bottom view which shows the folding chair of the closed state by one Embodiment The front view which shows the folding chair of the closed state by one Embodiment The rear view which shows the folding chair of the closed state by one Embodiment The figure which shows a seat surface board about the folding chair by one Embodiment The figure which shows a side plate about the folding chair by one Embodiment. The figure which shows an example of the operation | movement at the time of opening the folding chair by one Embodiment (the 1) The figure which shows an example of the operation | movement at the time of opening the folding chair by one Embodiment (the 2) The figure which shows an example of the operation | movement at the time of closing the folding chair by one Embodiment (the 1) The figure which shows an example of the operation | movement at the time of closing the folding chair by one Embodiment (the 2) The figure which shows an example of the use condition of the folding chair by one Embodiment

A folding chair according to an embodiment will be described with reference to the drawings.
In each figure, FIGS. 1-6 is a figure which shows the open state of the folding chair 10. FIG. 7-12 is a figure which shows the closed state of the folding chair 10. FIG. The right side view showing the open state of the folding chair 10 is omitted because it is a mirror image of the left side view shown in FIG. Similarly, the right side view showing the open state of the folding chair 10 is omitted because it is a mirror image of the left side view shown in FIG.

  In the following description, the folding chair 10 is simply referred to as a chair 10. Moreover, in the following description, the front and rear, the left and right, and the top and bottom of the chair 10 are based on the posture of the user when using the chair 10, and are specifically as indicated by arrows in each figure. In the following description, the plan view means an aspect of the chair 10 viewed from above, and the side view means an aspect of the chair 10 viewed from the left and right sides. Similarly, the front view and the back view mean a mode in which the chair 10 is viewed from the front side and the back side. In addition, front and rear, left and right, and top and bottom of the chair 10 are set for the sake of convenience in explanation, and are not limited to the description of the description of the embodiment and the mode illustrated in the drawings.

  In the following description, mountain fold means that two regions located on both sides of a groove-shaped bent portion formed in each member are bent in directions away from each other. In addition, valley folding means that two regions located on both sides of a bent portion bend in a direction approaching each other.

  The chair 10 is configured to be switchable between an open state shown in FIGS. 1 to 6, that is, a use state, and a closed state that is shown in FIGS. 7 to 12, that is, a folded state. The folding chair 10 exhibits a function as a chair by being in the open state shown in FIG. 1 and the like, and is folded into a plate shape as a whole by being in the closed state shown in FIG. The user uses the chair 10 in the open state shown in FIG. For example, as shown in FIG. 19, the user can use the chair 10 by placing the chair 10 between the user's buttocks and the floor surface in order to assist the sitting. Further, when the user carries the chair 10, for example, the user can fold the chair 10 in a closed state as shown in FIG.

  In the open state, the chair 10 of the present embodiment has a vertical dimension, that is, a height dimension of approximately 15 cm, a horizontal dimension, that is, a maximum width of approximately 19 cm, and a longitudinal dimension of approximately 21 cm. In the closed state, the chair 10 of the present embodiment has a height dimension of about 19 cm, a horizontal width dimension of about 3 to 5 cm, and a front-rear direction dimension of about 25 cm. The specific dimensions of the chair 10 are not limited to those described above.

  As shown in FIG. 1 and the like, the chair 10 includes one seat plate 20 and two side plates 30. The seat plate 20 is a molded product made of resin such as polypropylene, for example, and is configured in a single plate shape as shown in FIG. The seat surface plate 20 is configured to be bendable into two. As shown in FIGS. 1 and 2, the seat surface plate 20 is a plate-shaped seat surface that is curved so that at least one side in the front-rear direction, in this case, both ends in the front-rear direction, warp in the open state of the chair 10. Forming.

  Further, the seat surface plate 20 is configured in a flat plate shape as shown in FIG. 13 in a state where it is not assembled to the side surface plate 30. As shown in FIGS. 3 and 13, the seat plate 20 is formed in a circular shape that is elongated in the front-rear direction as a whole. In this case, the longitudinal direction of the chair 10, that is, the longitudinal direction of the seating surface plate 20 is the front-rear direction of the chair 10. In other words, the seat surface plate 20 is formed in a shape in which a circular front side is tapered forward as a whole, like a so-called water drop shape or a saddle shape of a bicycle.

  As shown in FIGS. 3 and 13, the seat surface plate 20 has a seat surface bending portion 21. The seat surface bending portion 21 is a mountain-folded groove portion formed on the outer side surface or the inner side surface of the seat surface plate 20, and is linearly formed along the longitudinal direction of the seat surface plate 20, that is, the front-rear direction of the chair 10. As shown in FIG. 7 and the like, the seat surface plate 20 is configured to be bent in two by being folded into a mountain fold with the seat surface bent portion 21 as a fulcrum. As shown in FIGS. 3 and 13, the seat plate 20 is configured symmetrically with respect to the seat bend 21. In this case, out of the entire area of the seating surface plate 20, the right side portion with respect to the seating surface bending portion 21 is defined as a left side region 221, and the left side portion with respect to the seating surface bending portion 21 is defined as a right side region 222.

  Further, the seat plate 20 has a plurality of holes 23 as shown in FIG. Each hole 23 is formed through the seat surface plate 20 in the thickness direction in a circular shape. In this case, three holes 23 are formed in each of the left region 221 and the right region 222 of the seat plate 20. Each hole 23 formed in the left region 221 and the right region 222 is a portion excluding the edge of the outer peripheral portion of each region 221, 222, that is, the center portion in the width direction in each region 221, 222, Are arranged side by side.

  As shown in FIGS. 1, 5, 6, and the like, the two side plates 30 support the seat plate 20 in the open state of the chair 10, and are disposed to face each other. The side plate 30 is a molded product of a resin material such as polypropylene. As shown in FIG. 14 and the like, the side plate 30 is formed in a substantially rectangular plate shape that is long in the front-rear direction as a whole. Note that the side plate 30 provided on the left side of the chair 10 and the side plate 30 provided on the right side of the chair 10 have a mirror image relationship as if they are reversed with each other. It is attached and explained.

  In the present embodiment, as shown in FIG. 14, the side plate 30 is configured in a non-target shape with respect to the center in the front-rear direction. The side plate 30 includes a first connection part 31, a second connection part 32, a third connection part 33, and a side part 34. The first connection portion 31 is provided at the front end portion of the side plate 30, that is, at one end portion in the longitudinal direction, and is formed in a substantially rectangular shape that is elongated in the vertical direction. The second connection portion 32 is provided at the rear end portion of the side plate 30, that is, the end portion on the other side in the longitudinal direction, and is formed in a substantially rectangular shape elongated in the vertical direction, like the first connection portion 31. . The 3rd connection part 33 is provided in the upper part of the side plate 30, and is formed in the circular arc shape long in the front-back direction.

  The side surface portion 34 is a portion surrounded by the first connection portion 31, the second connection portion 32, and the third connection portion 33. The side portion 34 constitutes a side portion of the chair 10 in the opened chair 10 shown in FIG. As shown in FIG. 1 etc., when using the chair 10 in an open state, the lower end part of the side part 34 contacts with the ground. As shown in FIG. 14 and the like, the side surface portion 34 has a central region 341, a front region 342, and a rear region 343. The central area 341 is an area of the central portion of the side surface portion 34 in the front-rear direction. The front region 342 is a region on the front side with respect to the central region 341. The rear region 343 is a rear region with respect to the central region 341.

  Further, the side plate 30 includes a plurality of bent portions, in this case, as shown in FIG. 14 and the like, a first connection bending portion 351, a second connection bending portion 352, a third connection bending portion 353, and a first side bending portion 361. And a second side bent portion 362. Each of the bent portions 351, 352, 353, 361, 362 is a groove portion formed on the outer side surface or the inner side surface of the side plate 30. The left and right side plates 30 can be separated from each other so as to swell in the left-right direction, that is, the width direction of the chair 10 by bending in the mountain fold or valley fold direction with the bent portions 351, 352, 353, 361, 362 as fulcrums. It is configured.

  The first connection bent portion 351 is a valley-folded groove portion formed linearly along the longitudinal direction of the first connection portion 31, that is, the vertical direction. The first connection bending portion 351 forms a boundary between the front region 342 of the side surface portion 34 and the first connection portion 31. The second connection bent portion 352 is a valley-folded groove portion formed linearly along the longitudinal direction of the second connection portion 32, that is, the vertical direction. The second connection bent part 352 forms a boundary between the rear region 343 of the side part 34 and the second connection part 32. The third connection bending part 353 is provided in the upper part of the central region 341, and is a mountain-fold groove part formed in a curved shape that slightly bulges downward. The third connection bending portion 353 forms a boundary between the central region 341 of the side surface portion 34 and the third connection bending portion 353.

  The first side surface bent portion 361 and the second side surface bent portion 362 are each a mountain-folded groove portion formed from the upper end portion to the lower end portion of the side plate 30. The first side bent portion 361 forms a boundary between the central region 341 and the front region 342 in the side portion 34. The second side bent portion 362 forms a boundary between the central region 341 and the rear region 343 in the side portion 34.

  As shown in FIG. 14, the first side-surface bent portion 361 and the second side-surface bent portion 362 are formed in a curved shape so as to swell outward from the center portion in the front-rear direction of the side plate 30 in a side view. Yes. In this case, in a side view, the distance between the lower end A1 of the first side bend 361 and the lower end A2 of the second side bend 362 is equal to the upper end B1 of the first side bend 361 and the second side bend 362. Is smaller than the distance to the upper end B2. Moreover, the distance between the 1st side surface bending part 361 and the 2nd side surface bending part 362 becomes the maximum in the middle part of an up-down direction in side view, and becomes the minimum in a lower end part. Further, the upper end B2 of the second side bend 362 is located above the upper end B1 of the first side bend 361. That is, the length dimension of the second side bend 362 is shorter than the length dimension of the first side bend 361.

  Further, as shown in FIG. 5, when the first side surface bent portions 361 and 361 of the left and right side plates 30 and 30 are viewed with respect to the chair 10 in the open state, the first side surface bent portions of the left and right side plates 30 and 30 are seen. In the front view, 361 and 361 are curved so that the central part in the vertical direction is closest, and the distance between the 361 and 361 increases in the vertical direction. In this case, in the left and right side plates 30, 30, the distance between the lower ends A1, A1 of the first side bent portions 361, 361 is the distance between the upper ends B1, B1 of the first side bent portions 361, 361. Is set larger than.

  Similarly, as shown in FIG. 6, when the second side bent portions 362 and 362 of the left and right side plates 30 and 30 are viewed on the chair 10 in the open state, the second side bent portions of the left and right side plates 30 and 30 are seen. The parts 362 and 362 are curved so that the center part in the vertical direction is closest when viewed from the back and the distance between the parts 362 and 362 increases in the vertical direction. In this case, in the left and right side plates 30, 30, the distance dimension between the lower end portions A2, A2 of the second side bent portions 362, 362 is the distance dimension between the upper end portions B2, B2 of the second side bent portions 362, 362. Is set larger than.

  As shown in FIG. 14, the side plate 30 has a plurality of holes 371, 372, 373, and 374. Each of the holes 371, 372, 373, and 374 is formed so as to penetrate the side plate 30 in a circular shape in the thickness direction. Two holes 371 are provided in the first connecting portion 31 along the longitudinal direction of the first connecting portion 31, that is, in the vertical direction. Two holes 372 are provided in the second connection portion 32 along the longitudinal direction of the second connection portion 32, that is, the vertical direction. Three holes 373 are provided in the third connection portion 33 along the longitudinal direction of the third connection portion 33, that is, the front-rear direction. And the hole part 374 is provided in the center part of the upper and lower sides of the center area | region 341 of the side part 34, and front and back.

  As shown in FIGS. 7, 11, 12, and the like, the left and right side plates 30, 30 are fasteners such as rivets in the holes 371, 372 with the inner surfaces facing each other. 41 is passed, the 1st connection parts 31 and 31 and the 2nd connection parts 32 and 32 are mutually connected. That is, the two front and rear sides of the two left and right side plates 30, 30 are connected to each other. The two side plates 30 and 30 are bent in the first connecting bent portion 351, the second connecting bent portion 353, the first side bent portion 361, and the second side bent portion 362, so that the width direction of the chair 10 is increased. That is, it is configured to be able to be separated from each other in a direction perpendicular to the extending direction of the seat bending portion 21 in a plan view.

  The left and right side plates 30, 30 and the seat surface plate 20 are the hole portions 341 and the respective holes in a state where the hole portions 341 of the left and right side surface plates 30, 30 are overlapped with the hole portions 23 of the seat surface plate 20. The fasteners 41 are passed through the portions 23 so that they are connected to each other.

  The stopper 42 is inserted into the hole 374 as shown in FIG. The stopper 42 is, for example, a metal or resin snap button or hook. The stoppers 42, 42 provided on the left and right side plates 30, 30 are configured to be detachable, that is, lockable to each other. When the user closes the chair 10, the user locks the stoppers 42, 42 of the left and right side plates 30, 30 with each other. Accordingly, the chair 10 is held in a state in which the left and right side plates 30, 30 are prevented from opening apart and are folded into a plate shape.

  As shown in FIGS. 1 and 7, the chair 10 configured as described above includes a seat bending portion 21, a first connection bending portion 351, a second connection bending portion 352, a third connection bending portion 353, and a first side surface. The bending portion 361 and the second side surface bending portion 362 can be opened and closed in the width direction, that is, the thickness direction of the side plate 30. That is, the chair 10 bends and stretches the seat surface bending portion 21, the first connection bending portion 351, the second connection bending portion 352, the third connection bending portion 353, the first side surface bending portion 361, and the second side surface bending portion 362. Thus, it can be opened and closed in an open state and a closed state.

  In the present embodiment, the open state refers to a state in which the left and right side plates 30, 30 are moved away from each other, as shown in FIGS. 1 to 6. Moreover, a closed state means the state which left and right side plate 30 and 30 moved to the direction which mutually approaches, as shown in FIGS. As shown in FIGS. 1 to 6, the chair 10 has a container shape in which one side, that is, the lower side is opened, in the open state. The chair 10 exhibits a function as a chair in the open state.

  The user can open the chair 10 in the open state, for example, as shown in FIGS. That is, first, as shown in FIG. 15, the user holds both left and right ends of the seat plate 20 folded in a mountain fold with respect to the closed chair 10. Then, as shown in FIG. 16, the user pulls the left and right end portions of the seating surface plate 20 toward the user side with the thumb as a fulcrum while pushing the seating surface bending portion 21 with the thumbs of both hands. Then, the seat surface plate 20 opens in a plate shape with the seat surface bending portion 21 as a fulcrum, and the left and right side plates 30, 30 are opened apart from each other as the seat surface plate 20 moves.

  In the chair 10, when the left and right side plates 30, 30 are separated from each other and are in an open state, the seat plate 20 is opened, whereby a curved plate-shaped seat surface is formed. In this case, as shown in FIGS. 1 and 4 to 6, the seat surface plate 20 has a form extending in the opening / closing direction with respect to the upper end portion of the side surface plate 30. That is, in the open state of the chair 10, the seating surface plate 20 extends in the left-right horizontal direction, that is, in the width direction of the chair 10 from the upper ends of the two left and right side plates 30, as shown in FIGS. 1 and 4 to 6. It has an extended region 24 that extends.

  Although such a chair 10 can be used as a normal folding chair, it is suitable as a folding chair for a regular seat for assisting a regular seat. That is, when the user sits, for example, as shown in FIG. 19, the user places his / her buttocks on the seating surface plate 20 and sits so that his / her lower knee portion is inserted below the extension region 24. That is, the user sits in a straight line so that the left and right side surfaces of the side plate 30 of the chair 10 are sandwiched between the lower knee portions of the user. Thereby, since most of a user's weight is received by the seat surface board 20 of the chair 10, the load added to a user's lower knee part and a thigh can be reduced. As a result, it is possible to reduce the burden such as foot numbness associated with sitting straight. Note that the user may sit on the chair 10 in a posture other than the sitting posture.

  Moreover, the user can fold the chair 10 in the closed state as shown in FIGS. 17 and 18, for example. That is, as shown in FIG. 17, the user first holds the left and right ends of the curved plate-shaped seating surface plate 20, that is, the extension region 24 with both hands in the opened chair 10. Then, as shown in FIG. 18, the user pushes the left and right ends of the seat plate 20, that is, the extension region 24, to the side opposite to the user. Then, the seat surface plate 20 bends in two with the seat surface bending portion 21 as a fulcrum, and the left and right side plates 30 move in the direction in contact with each other as the seat surface plate 20 moves and close. Thereby, the chair 10 is folded by plate shape as a whole.

  According to the above embodiment, the chair 10 includes the single seating surface plate 20 and the two side surface plates 30. The seat surface plate 20 is formed in a plate shape, has a seat surface bending portion 21 formed in a straight line in plan view, and is configured to be bendable into two with the seat surface bending portion 21 as a fulcrum. The two left and right side plates 30, 30 are formed in a plate shape and are arranged to face each other. The left and right side plates 30, 30 are configured to be openable and closable in the direction perpendicular to the extending direction of the seat bending portion 21, that is, in the left and right directions, and support the seat plate 20 in the open state.

  When the two side plates 30, 30 are separated from each other and opened, the seat plate 20 is opened and a seat surface is formed. Further, when the two side plates 30 and 30 come close to each other and the chair 10 is in the closed state, the seat plate 20 is folded in two with the seat bending portion 21 as a fulcrum and is folded.

  According to this, the main structure of the chair 10 can be comprised by the one seat surface board 20 and the two side plates 30,30. Therefore, the number of parts of the chair 10 can be reduced as much as possible and a simple configuration can be achieved. Moreover, the chair 10 becomes a plate shape which has the thickness of the seat surface board 20 folded in two and the thickness of the two side plates 30, 30 in the closed state. Therefore, the chair 10 can be made as thin as possible in the closed state. As a result, the storability and portability of the chair 10 are improved. Furthermore, since the closed chair 10 is plate-shaped, for example, even when a plurality of chairs 10 are stacked, it is difficult to be bulky. Therefore, the storage property and portability in the case of stacking a plurality of chairs 10 are also improved.

  Furthermore, when the chair 10 is in the open state, the seat surface 20 is opened, and a seat surface is formed that extends in the opening / closing direction with respect to the upper ends of the side plates 30 and 30. That is, in the chair 10 in the open state, a part of the seat plate 20 becomes the extension region 24. According to this, the chair 10 is suitable as a folding chair for assisting a regular seat. That is, as shown in FIG. 19, the user can sit with his / her buttock placed on the seating surface plate 20 and with his / her knee below the extension region 24. Thereby, the load added to a user's lower knee part and a thigh can be reduced, and burdens, such as the numbness of the leg accompanying a straight seat, can be reduced significantly.

  The chair 10 is mainly composed of one seat plate 20 and two side plates 30 which are resin molded products, and does not require parts such as a metal pipe serving as a frame. Therefore, since metal parts can be reduced as much as possible, the weight can be reduced compared to a chair of the same size.

  Moreover, the seat surface plate 20 of the chair 10 is formed in the shape which tapers toward one side of the extending direction of the seat surface bending part 21, ie, the front, in an open state. According to this, the user can easily fold the knee with his buttocks on the seat plate 20 and insert the lower knee portion below the extension region 24. As a result, the user can sit down more comfortably.

  In addition, the seat surface plate 20 forms a seat surface that is curved so that at least one end of the seat surface bending portion 21 is warped in the open direction, that is, the center portion in the front-rear direction. In the case of this embodiment, the seat surface plate 20 forms a seat surface that is curved so that both end portions in the front-rear direction warp in the open state. According to this, when a user puts a collar part on the seat surface board 20, a user's collar part becomes easy to be guided to the center part along the curved shape of the seat surface board 20. FIG. Thereby, since a user's buttocks fits into the curved seat surface board 20, it becomes difficult for a user's buttocks to remove | deviate from the seat surface board 20, and, as a result, a user can sit down more comfortably.

  The side surface plate 30 has two side surface bent portions 361 and 362 formed from the upper end portion to the lower end portion of the side surface plate 30 and is configured to be bendable with the side surface bent portions 361 and 362 as fulcrums. The side bent portions 361 and 362 are formed in a curved shape so as to bulge outward from the central portion of the side plate 30. According to this, the load resistance of the chair 10 in the open state can be increased. The load resistance of the chair 10 varies depending on the size of the chair 10 and the thickness of the seat plate 20 and the side plate 30. For example, the seat 10 and the side plate 30 are made of a plate having a thickness of about 2 mm. When configured, a load capacity of 100 kg or more can be exhibited. As a result, the stability when the user sits on the chair 10 is improved.

The present invention described above is not limited to the above-described embodiments, and can be applied to various embodiments without departing from the scope of the invention.
The seat surface plate 20 and the side surface plate 30 are not limited to resin materials such as polypropylene, but may be light metal such as aluminum or wood.
In addition, the size of the chair 10 can be changed as appropriate according to the user, the usage environment, the purpose of use, and the like.

  In the drawings, 10 is a folding chair, 20 is a seat plate, 21 is a seat bend, 24 is an extension region, 30 is a side plate, 361 is a first side bend (side bend), and 362 is a second side bend. The part (side bending part) is shown.

The folding chair of the embodiment is formed in a plate shape having a seat surface bent portion formed in a plate shape and linearly formed in a plan view, and a seat surface plate that can be bent in two with the seat surface bent portion as a fulcrum. And two side plates arranged opposite to each other and configured to be able to be opened and closed mutually in a direction perpendicular to the extending direction of the seat bending portion, and supporting the seat plate in the open state. When the two side plates are opened apart from each other, the seat plate opens to form a seating surface having an extension region extending in the opening / closing direction with respect to the upper end portion of the side plate. When the side plates approach each other and are in the closed state, the seat plate is folded in two with the seat bend portion as a fulcrum. The said seat surface board is formed in the shape which tapers toward one side of the extending | stretching direction of the said seat surface bending part in an open state. Alternatively, the side surface plate has two side surface bent portions formed from the upper end portion to the lower end portion of the side surface plate and is configured to be foldable with the side surface bent portion as a fulcrum. It is formed in a curved shape so as to swell outward from the central portion of the side plate.

Claims (4)

A seat plate that is formed in a plate shape and has a seat surface bent portion that is linearly formed in plan view and that can be bent in two with the seat surface bent portion as a fulcrum;
Two side plates that are formed in a plate shape and are arranged to face each other and configured to be able to open and close each other in a direction perpendicular to the extending direction of the seat surface bending portion, and support the seat surface plate in an open state; With
When the two side plates are opened apart from each other, the seat plate opens to form a seating surface having an extension region extending in the opening / closing direction with respect to the upper end portion of the side plate. When the side plates approach each other and are in a closed state, the seat plate is folded in two with the seat bend portion as a fulcrum, and is folded.
Folding chair. The seat plate is formed in a shape that tapers toward one side in the extending direction of the seat bend in the open state.
The folding chair according to claim 1. The seat surface plate forms a seat surface that is curved so that at least one end of the seat surface bending portion in the open state warps upward with respect to the center portion in the extending direction.
The folding chair according to claim 1 or 2. The side plate has two side bent portions formed from the upper end portion to the lower end portion of the side plate, and is configured to be foldable with the side bent portion as a fulcrum.
The side bent portion is formed in a curved shape so as to bulge outward from the center portion of the side plate,
The folding chair as described in any one of Claim 1 to 3.

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