JP6360981B1 - Folding chair - Google Patents

Abstract

[PROBLEMS] To improve sitting comfort and the like.
A folding chair 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 bending portion that can be folded in two with the seat surface bending portion as a fulcrum. And two side portions that are arranged to face each other and are configured to be able to open and close each other in the direction perpendicular to the extending direction of the bending portion of the seating surface and support the seating surface portion in the open state. The folding chair has a W-shape in which the two side portions are spaced apart from each other and open, and the seat surface portion opens, and both end portions in the extending direction of the seat surface bending portion are warped and the center portion is raised at the seat surface portion. When the two side surfaces approach each other and are in the closed state, the seat surface is folded in two with the seat surface bent portion as a fulcrum, and is folded.
[Selection] Figure 1

Description

  Embodiments described herein relate generally to a folding chair.

  For example, as disclosed in Patent Document 1, there is a folding chair configured to be lightweight and foldable by a plate-like member in consideration of portability and storage properties. However, the folding chair having a conventional configuration still has room for improvement in terms of sitting comfort, strength, and portability.

JP 2016-27836 A

  Therefore, an object of the present invention is to provide a folding chair that can improve at least one of sitting comfort, strength, and portability.

  The folding chair of the embodiment is formed in a plate shape, has a seat surface bending portion formed in a straight line in plan view, and has a seat surface portion that can be bent in two with the seat surface bending portion as a fulcrum, and in a plate shape And two side portions that are formed so as to be opposed to 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 portion in the open state.

  In the folding chair, when the two side surfaces are separated from each other and opened, the seat surface portion is opened, and both end portions in the extending direction of the seat surface bending portion are warped in the seat surface portion, and a central portion is formed. A raised W-shaped seating surface is formed, and when the two side surface parts approach each other and are in a closed state, the seating surface part is folded into two with the seating surface bending portion as a fulcrum and is folded.

  In addition, when the folding chair is in an open state with the two side portions separated from each other, the seat surface portion is opened and a seat surface is formed, and the side surface portion is on the extension line of the seat surface bending portion in a bottom view. When the two side surface parts approach each other and are in a closed state, the seat surface part bends in two with the seat surface bending part as a fulcrum. Folded.

  Further, in the folding chair, the side portion is connected to the facing side portion and cannot be separated from the facing side portion, and the facing portion not connected to the facing side portion. A side surface region separable from the side surface portion, and two connection bent portions formed at a boundary portion between the side surface region and the connection region and capable of bending the side surface region and the connection region. The bent portion is curved in an S shape or an inverted S shape from the seat surface portion side toward the lower end portion side of the side surface portion.

The perspective view which shows the open state of the folding chair by one Embodiment The front view which shows the open state of the folding chair by one Embodiment The top view which shows the open state of the folding chair by one Embodiment The bottom view which shows the open state of the folding chair by one Embodiment The left view which shows the open state of the folding chair by one Embodiment The perspective view which shows the closed state of the folding chair by one Embodiment The front view which shows the closed state of the folding chair by one Embodiment The top view which shows the closed state of the folding chair by one Embodiment The bottom view which shows the closed state of the folding chair by one Embodiment The left view which shows the closed state of the folding chair by one Embodiment The top view which shows the state before the assembly 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. 1-5 is a figure which shows the open state of the folding chair 10, ie, the state at the time of use. 6-10 is a figure which shows the closed state of the folding chair 10, ie, the state at the time of folding. FIG. 11 is a view showing a state before the folding chair 10 is assembled. 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. The front and rear, the left and right, and the upper and lower sides of the chair 10 are set for convenience of explanation, and do not limit the usage mode of the chair 10.

  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 5, that is, a use state, and a closed state that is shown in FIGS. 6 to 10, 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. 6 and the like. The user uses the chair 10 in the open state shown in FIG. 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.

  As shown in FIG. 1 and the like, the chair 10 includes one seat surface portion 20 and two side surface portions 30. The chair 10 is a molded product made of resin such as polypropylene. In the case of this embodiment, the seat surface portion 20 and the side surface portion 30 are integrally formed into a single flat plate shape as shown in FIG. 11, for example. In this case, the seat surface portion 20 and the side surface portion 30 are connected via the boundary bending portion 11. In addition, the seating surface part 20 and the side surface part 30 may comprise one or both with a metal plate etc., for example, and may comprise each separately.

  The seat surface portion 20 constitutes a seat surface that receives the user's buttocks when the chair 10 is used. As shown in FIGS. 1 and 6, the seat surface portion 20 is configured to be bent in two. As shown in FIGS. 1 and 2, the seat surface portion 20 is a so-called W-shape that is curved so that the both end portions 201 in the left-right direction are warped and the center portion 202 is raised when viewed from the front and back in the open state of the chair 10. A plate-shaped seating surface is formed. In this case, as shown in FIG. 2, in the opened state of the chair 10, the distance Ha <b> 1 from the lower end portion of the side surface portion 30, i.e., the installation surface of the chair 10 to the left and right end portions 201 of the seat surface portion 20 That is, it is set longer than the distance Ha2 from the installation surface of the chair 10 to the central portion 202 of the seat surface portion 20. That is, the height dimension Ha1 from the installation surface of the chair 10 to the left and right end portions 201 of the seat surface portion 20 is set higher than the height dimension Ha2 from the installation surface of the chair 10 to the center portion 202. Therefore, when the chair 10 is used, the left and right end portions 201 of the seat surface portion 20 are located above the center portion 202.

  As shown in FIG. 3 and FIG. 11, the seat surface portion 20 is formed in a substantially circular shape that is elongated in the left-right direction as a whole and has a left and right central portion that is concavely curved in plan view. In this case, the longitudinal direction of the chair 10, that is, the longitudinal direction of the seat surface portion 20 is the left-right direction of the chair 10. In other words, the seat surface portion 20 has a shape in which a circular front side is tapered toward the left and right sides as a whole like a cross-sectional shape of a so-called rugby ball in a plan view, and a central portion in the longitudinal direction is recessed. It is formed in the shape.

  Further, as shown in FIG. 1 and the like, the seat surface portion 20 has a seat surface bent portion 21. The seat surface bending portion 21 is a mountain-fold groove formed on the outer surface of the seat surface portion 20, and is formed linearly along the longitudinal direction of the seat surface portion 20, that is, the left-right direction of the chair 10 in plan view. That is, as shown in FIG. 11, the seat surface bending portion 21 is formed linearly along the longitudinal direction of the seat surface portion 20 in a state where the chair 10 is not assembled. As shown in FIG. 6 and the like, the seat surface portion 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 FIG. 3 and the like, the seat surface portion 20 is configured to be symmetric in the front-rear direction and in the left-right direction with respect to the seat surface bending portion 21. In this case, the seat surface portion 20 is divided into two regions, front and rear, by the seat surface bending portion 21.

  As shown in FIGS. 1 and 5, the two side surface portions 30 support the seat surface portion 20 in the open state of the chair 10, and are disposed facing each other in the front-rear direction. That is, the side part 30 comprises the side part of the chair 10 in the open chair 10 shown in FIG. As shown in FIG. 1 and the like, when the chair 10 is used in the open state, at least a part or the whole of the lower end portion of the side surface portion 30 is in contact with the ground, that is, the installation surface. As shown in FIG. 2 etc., the side part 30 is formed in the substantially rectangular plate shape as a whole. In the case of this embodiment, the side part 30 is comprised by the left-right symmetric shape, as shown in FIG.2 and FIG.7. In addition, you may comprise the side part 30 asymmetrical.

  The seat surface portion 20 and the side surface portion 30 are connected by the boundary bending portion 11. That is, the boundary bending portion 11 is a boundary portion that divides the seat surface portion 20 and the side surface portion 30. The boundary bending portion 11 is a mountain-folded groove portion formed on the outer surface of the seat surface portion 20 and the side surface portion 30. As shown in FIGS. 7 and 11, the boundary bending portion 11 is provided in a range of about ½ of the central portion side of the total length of the closed chair 10 in the left-right direction. As shown in FIGS. 2 and 7, the boundary bending portion 11 is formed in a so-called W shape that is curved so that both end portions 111 in the left-right direction are warped and the central portion 112 is raised as viewed from the front and the back. . In this case, in the closed state of the chair 10, the distance Hb <b> 1 from the lower end portion of the side surface portion 30, i.e., the installation surface of the chair 10, to the left and right end portions 111 of the boundary bending portion 11 is the lower end portion of the side surface portion 30, i.e., the installation surface of the chair 10. Is set shorter than the distance Hb <b> 2 from the center bent portion 11 to the center portion 112.

  The side part 30 has two connection bending parts 31 and two side bending parts 32, as shown in FIGS. The connection bending portion 31 is a trough-fold groove portion formed on the inner side surface of the side surface portion 30. The side bent portion 32 is a mountain fold groove formed on the outer surface of the side portion 30. The connection bending portion 31 is a valley-folded groove portion formed in an S shape or an inverted S shape along the longitudinal direction of the connection region 33, that is, the vertical direction.

  As shown in FIG. 7, the connection bending portion 31 is provided in a portion near the left and right ends of the side surface portion 30, and is provided across the vertical direction of the side surface portion 30. In the case of this embodiment, the connection bending part 31 is extended in the up-down direction, ie, the seat surface part 20 side toward the lower end side of the side part 30, so that it may curve in a S shape or a reverse S shape. In this case, as shown in FIG. 7 and the like, of the two connection bent portions 31 provided on one side surface portion 30, the right connection bent portion 31 extends in the vertical direction and has a gentle S-shape. It is formed in a curved shape. Further, the connecting bent portion 31 on the left side is formed in a shape that extends in the vertical direction and is curved in a gentle inverted S shape.

  That is, the two connection bending portions 31 provided on one side surface portion 30 are configured to be bilaterally symmetric. In this case, as shown in FIG. 7 and the like, the connection bending portion 31 is curved so as to be recessed toward the center side in the left-right direction from the seat surface portion 20 side to a position above the center in the vertical direction of the chair 10, and thereafter It is formed in a curved shape so as to bulge outward in the left-right direction toward the lower end portion of the side surface portion 30.

  The side-surface bent portion 32 is provided on the side surface portion 30 near the center in the left-right direction, and is provided across the vertical direction of the side surface portion 30. In this case, as shown in FIG. 7 and the like, the side surface bent portion 32 extends from the seat surface portion 20 side to the lower end side of the side surface portion 30 and from the left and right end portions of the connection bent portion 31 to the center portion in the left and right direction of the side surface portion 30. It is formed in a curved shape. In this case, the two side surface bent portions 32 provided on the side surface portion 30 are in contact with each other at the lower end portion of the side surface portion 30, that is, intersect.

  Further, the side surface portion 30 has two connection regions 33 and two side regions 34. The connection region 33 is provided at both left and right end portions of the side surface portion 30. The connection region 33 is a region connected to the opposite side surface portion 30 and is configured not to be separated from the opposite side surface portion 30. In this case, the two side surface portions 30 are connected to each other by fastening parts such as the rivet 12 in a state where the connection regions 33 of the two opposite side surface portions 30 are overlapped.

  The connection region 33 is formed in a strip shape that is elongated in the vertical direction, that is, from the seat surface portion 20 side toward the lower end side of the side surface portion 30 and is curved in an S shape or an inverted S shape. In this case, as shown in FIG. 7 and the like, of the two connection regions 33 provided in one side surface portion 30, the connection region 33 on the right side is formed in an S shape, and the connection region 33 on the left side is formed. Is formed in an inverted S shape.

  Specifically, as shown in FIG. 2, the connection region 33 is curved so as to be recessed toward the center in the left-right direction from the seat surface portion 20 side to the position above the center in the vertical direction of the chair 10, and thereafter It is formed in a curved shape so as to bulge outward in the left-right direction toward the lower end portion of the side surface portion 30. Therefore, the side part 30 has the constriction part 331 and the bulging part 332 as shown in FIG.2 and FIG.7 etc. FIG. The constricted portion 331 is a portion constricted in a curved shape toward the center side in the left-right direction of the side surface portion 30 in the middle portion of the connection region 33 in the up-down direction. The bulging portion 332 is a portion that is provided below the constricted portion 331 in the middle portion of the connection region 33 in the vertical direction and bulges in a curved shape toward the outer side in the left-right direction of the side surface portion 30.

  In this case, as shown in FIG. 2, in the open state of the chair 10, the distance La <b> 2 between the constricted portions 331 at the left and right ends of the side surface portion 30 is smaller than the length dimension La <b> 1 of the upper end of the side surface portion 30. As shown in FIG. 7, in the closed state of the chair 10, the distance Lb <b> 2 between the left and right bulging portions 332 in the side surface portion 30 is substantially equal to the length dimension Lb <b> 1 of the upper end of the side surface portion 30. In this case, “substantially equal” does not require that the distance Lb2 between the bulging portions 332 and the length Lb1 of the upper end of the side surface portion 30 are completely equal, and a dimensional error that occurs during manufacturing. Of course, a difference of about the width in the left-right direction of the connection region 33 per left and right sides is allowed.

  The side surface region 34 is a region that occupies most of the side surface portion 30 as a whole. The connection region 33 and the side surface region 34 are separated by the connection bending portion 31. The side surface region 34 is a region that is not connected to the opposite side surface portion 30 and is configured to be separable from the opposite side surface portion 30. In the present embodiment, each side surface region 34 has one first side surface region 341 and two second side surface regions 342.

  The first side surface region 341 is a region surrounded by the boundary bending portion 11 and the two side surface bending portions 32 in the side surface portion 30. The first side surface region 341 is located in the left and right central portion of the side surface portion 30, and is formed in a substantially semicircular shape that is pointed downward as a whole. The second side surface region 342 is a region provided between the connection bent portion 31 and the side bent portion 32 in the side surface portion 30. Each second side surface region 342 is provided on each of the left and right sides of the first side surface region 34.

  The second side surface region 342 and the connection region 33 can be bent in the valley folding direction with the connection bending portion 31 as a fulcrum. The first side surface region 341 and the second side surface region 342 can be bent in the mountain fold direction with the side surface bent portion 32 as a fulcrum. Thereby, as shown in FIG. 3 etc., the chair 10 is comprised so that separation | spacing is possible so that it may mutually swell in the front-back direction. Therefore, the chair 10 is configured to be openable and closable in the direction perpendicular to the extending direction of the seat bending portion 21, that is, in the front-rear direction. The side surface portion 30 supports the seat surface portion 20 in the open state of the chair 10.

  In the case of the present embodiment, the opening is formed in a rhombus shape having apexes on the extension line of the seating surface bending portion 21 and on the right angle line with respect to the seating surface bending portion 21 passing through the center of the seating surface bending portion 21 in the bottom view. That is, in the following description, as shown in FIG. 4, the imaginary line along the extending direction of the seat bending portion 21, that is, the virtual line in the left and right direction along the seat bending portion 21 in the bottom view is defined as a line Y. . Further, in the bottom view, a virtual line that passes through the center of the seat bending portion 21, that is, the center of the chair 10 and extends in a direction perpendicular to the line Y is defined as a line X. In this case, the line X is the front and rear direction of the user and the chair 10 when the chair 10 is used, and the line Y is the left and right direction of the user and the chair 10 when the chair 10 is used. The two side surfaces 30 open in a rhombus shape having vertices 35 and 36 on the line X in the front-rear direction and the line Y in the left-right direction in the open state of the chair 10.

  Moreover, the chair 10 is provided with the handle part 13 and the stopper 14 as shown in FIG. The handle portion 13 is provided at a slightly lower portion in the first side surface region 341 of the side surface portion 30. The handle portion 13 is formed through the first side surface region 341 in a substantially long hole shape that is long in the left-right direction. The user can use the handle portion 13 as a handle when carrying the chair 10.

  The stopper 14 is, for example, a metal or resin snap button or hook. The stopper 14 is provided in the side surface portion 30 at a central portion in the left-right direction and slightly below the vertical direction. In this case, the stopper 14 is provided at the center in the left-right direction of the handle portion 13 and on the upper side of the handle portion 13, that is, on the seat surface portion 20 side. When the user closes the chair 10, the user locks the stoppers 14 and 13 of the two side surfaces 30 and 30 with each other. As a result, the chair 10 is held in a state of being folded into a plate shape by preventing the two side surface portions 30 and 30 from opening apart. The specific shape and position of the handle 13 and the type, number, and position of the stoppers 14 are not limited to those of the present embodiment, and can be changed as appropriate.

  As shown in FIGS. 1 and 7, the chair 10 configured as described above is operated in the front-rear direction, that is, the side surface portion by the action of the boundary bending portion 11, the seat surface bending portion 21, the connection bending portion 31, and the side surface bending portion 32. 30 can be opened and closed in the thickness direction. That is, the chair 10 is configured to be openable and closable in an open state and a closed state by bending and extending the boundary bending portion 11, the seat surface bending portion 21, the connection bending portion 31, and the side surface bending portion 32. And in the open state, as shown in FIGS. 1-5, the chair 10 becomes a container shape which one side, ie, the lower side, opened, and exhibits the function as a chair. On the other hand, in the closed state, the chair 10 is folded into a plate shape in which two plates are stacked as shown in FIGS.

  According to the embodiment described above, the chair 10 includes one seat surface portion 20 and two side surface portions 30. The seat surface portion 20 is formed in a plate shape, and has a seat surface bending portion 21 that is formed in a straight line in plan view, and is configured to be foldable into two with the seat surface bending portion 21 as a fulcrum. . The two side surfaces 30 are each formed in a plate shape and are arranged to face each other. Each side surface portion 30 is configured to be openable and closable with respect to each other in a direction perpendicular to the extending direction of the seat bending portion 21, that is, the front-rear direction of the chair 10. The side surface portion 30 supports the seat surface portion 20 in the open state of the chair 10.

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

  According to this, the main structure of the chair 10 can be comprised by the one seat surface part 20 and the two side surface parts 30 and 30. FIG. 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 part 20 folded in two and the thickness of the two side surface parts 30 and 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.

  Further, when the chair 10 is in the open state, a seat surface portion 20 is opened, and both end portions 201 in the extending direction of the seat surface bending portion 21 are warped and a W-shaped seat surface is formed in which the central portion 202 is raised. The That is, the seat surface portion 20 of the chair 10 has a shape that is as close as possible to the user's buttocks in the open state. As a result, when the user sits on the chair 10, the contact area between the user's buttocks and the seat surface portion 20 can be increased as much as possible, and the weight of the user can be received evenly throughout the seat surface portion 20. Therefore, according to the present embodiment, it is possible to prevent the weight of the user's buttocks from being locally applied when the chair 10 is used. As a result, the chair 10 of the present embodiment is more comfortable to sit than a conventional folding chair, and it is possible to make it difficult for fatigue to accumulate even if the user sits for a long time.

  When the chair 10 is in the open state, the distance H1 from the lower end portion of the side surface portion 30, that is, the installation surface, to both end portions 111 of the seat surface portion 20 is the lower end portion of the side surface portion 30. It is longer than the distance H2. According to this, the seat surface portion 20 can wrap the user's buttocks by the both end portions 111 located higher than the central portion 112. As a result, a so-called hold feeling is increased, and the sitting comfort of the chair 10 is further improved.

  Here, the chair 10 transmits the weight of the user received by the seat surface portion 20 to the installation surface of the chair 10, that is, the ground via the lower end portion of the side surface portion 30. On the other hand, even when the user is sitting on the chair 10, the user is not completely stationary and may swing back and forth and right and left to change the posture. In this case, if the load is locally concentrated on a specific part of the entire lower end part of the side part 30, particularly a part that is a side of a straight line or a curve and is in contact with the ground, the side part 30. May buckle without being able to withstand the load.

  Therefore, in the present embodiment, when the two side surface portions 30 are separated from each other and are in the open state, the chair 10 is opened as shown in FIG. 30 opens in a quadrilateral shape, that is, a rhombus shape having apexes 35 and 36 on the extension line of the seat surface bending portion 21 and on the right angle line to the seat surface bending portion 21 in the bottom view. That is, as shown in FIG. 4, the side surface portion 30 opens in a rhombus shape having apexes 35 and 36 on the line X extending in the front-rear direction and the line Y extending in the left-right direction in the opened state of the chair 10.

  According to this, even when the user swings back and forth and left and right, the chair 10 receives a load at the front and rear vertices 35 and 36 of the rhombus, that is, the corner portions 35 and 36 where the side surface portion 30 is bent. Can do. The corners 35 and 36 where the vertices 35 and 36, that is, the side portions 30 are bent, have a larger load resistance than the sides of a simple straight line or curve. Therefore, according to the present embodiment, even when the user swings back and forth, left and right, it is possible to prevent the side surface portion 30 from buckling without being able to withstand the load, and as a result, the chair 10. The load resistance and stability of the can be further improved.

  In addition, the side surface portion 30 includes a connection bending portion 31, a connection region 33, and a side surface region 34. The connection bending portion 31 is formed at a boundary portion between the connection region 33 and the side surface region 34 and is a groove portion that enables the connection region 33 and the side surface region 34 to be bent. The side surface region 34 is a region that is not connected to the other side surface portion 30 that faces the side surface region 34 and that can be separated from the other side surface portion 30 that faces the other side surface region. The connection area 33 is an area that is connected to the connection area 33 of the opposite side surface portion 30 and cannot be separated from the connection area 33 of the opposite side surface portion 30. The connection bending portion 31 is curved in an S shape and an inverted S shape from the seat surface portion 20 side toward the lower end portion side of the side surface portion 30.

  According to this, in the chair 10 in the open state, the second side surface region 342 of the side surface portion 30 can be formed into a twisted shape along the connection bending portion 31, whereby the second side surface region 342 is seated. As a result, the load resistance of the opened chair 10 can be further increased. The load resistance of the chair 10 varies depending on the size of the chair 10 and the thickness dimensions of the seat surface portion 20 and the side surface portion 30. For example, the seat surface portion 20 and the side surface portion 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.

  In this case, when the chair 10 in the closed state is viewed, as shown in FIG. 7, the distance Lb2 between the left and right bulging portions 332 of the side surface portion 30 is substantially equal to the length dimension Lb1 of the upper end of the side surface portion 30. equal. According to this, about the chair 10 at the time of folding, the width dimension of the left-right direction of the chair 10 in the bulging part 332 and a lower end part can be suppressed as much as possible. That is, it can prevent that the chair 10 of the folded state becomes trapezoid shape which the lower side expanded as a whole. Thereby, it is possible to easily store the seat 10 in a bag or the like when the chair 10 is folded while ensuring the seat surface portion 20 as large as possible. As a result, the portability of the chair 10 can be further improved. .

  And as for the chair 10 of this embodiment, the seat surface part 20 and the two side parts 30 are integrally molded. That is, the chair 10 of the present embodiment is configured by bending a single resin plate. According to this, the number of parts of the chair 10 can be reduced, and the labor of assembling can be saved. As a result, the manufacturability of the chair 10 can be improved, and the chair 10 can be efficiently manufactured at a low cost.

  In the drawings, 10 is a folding chair, 11 is a boundary bending portion, 20 is a seat surface portion, 201 is both ends of the seat surface portion, 202 is a central portion of the seat surface portion, 21 is a seat surface bending portion, 30 is a side surface portion, and 31 is a connection. A bent portion, 33 indicates a connection region, and 34 indicates a side region.

Claims (3)

A seat surface portion that is formed in a plate shape and has a seat surface bending portion that is linearly formed in a plan view and can be bent in two with the seat surface bending portion as a fulcrum;
Two side parts formed in a plate shape, arranged to face each other and configured to be openable and closable in a direction perpendicular to the extending direction of the seat surface bending part, and supporting the seat surface part in an open state; With
When the two side surface portions are separated from each other and are in an open state, the seat surface portion is opened, and both end portions in the extending direction of the seat surface bending portion are warped and the central portion is raised in the seat surface portion. When the two side surfaces approach each other and are in a closed state, the seat surface portion is folded in two with the seat surface bending portion as a fulcrum, and is folded.
Folding chair. In the open state, the distance from the lower end portion of the side surface portion to the both end portions of the seat surface portion is longer than the distance from the lower end portion of the side surface portion to the central portion of the seat surface portion,
The folding chair according to claim 1. The seat surface portion and the two side surface portions are integrally molded.
The folding chair according to claim 1 or 2.

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