Multipurpose folding table

Abstract

To provide a multipurpose folding board which, when being folded, is capable of preventing a structure for supporting a load from a top plate, from protruding from the top plate and having no protrusion formed in a stored state.SOLUTION: A bed 1 comprises at least: side plate parts 13 each including a first bellows plate 11 and a second bellows plate 12; a top plate 14 for covering upper sides of the side plate parts 13 in a use state; and a central support part 15 for supporting a central part of the top plate 14. The side plate parts 13 are formed to be extended / contracted in the longitudinal direction by engaging respective cuts of the first bellows plates 11 and the second bellows plates 12 with each other. The central support part 15 is mounted on a lower surface of the central part of the top plate 14. In a stored state of the bed 1, the side plate parts 13 are compressed in the longitudinal direction and the top plate 14 is folded into a chevron shape. At that time, the central support part 15 is raised in the lower side the top plate 14 to a position not to interfere with the side plate parts 13.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a multipurpose folding table that can be used in evacuation shelters during natural disasters such as earthquakes, tsunamis, and typhoons, as well as in everyday life. The multipurpose folding table of the present invention can be used as a bed, chair, sofa, table, luggage rack, stepladder, etc. [Background technology]

[0002] Conventionally, folding tables that can be used for multiple purposes in various places have been known. Generally, folding tables are required to be as compact as possible when not in use. Therefore, folding tables are designed to be as compact as possible, with minimal protrusions and a thin shape when stored.

[0003] Non-Patent Document 1 describes this type of folding table as a cardboard bed 100 having a structure as shown in Figures 10 and 11. The cardboard bed 100 is equipped with a plurality of first partition plates 101 and second partition plates 102, each formed in a rectangular shape.

[0004] Slits are formed at required positions on each of the first partition plate 101 and the second partition plate 102. Specifically, a slit is formed in the first partition plate 101 midway along its length, extending from the bottom end upward to match the arrangement of the second partition plate 102. On the other hand, a slit is formed in the second partition plate 102 midway along its length, extending from the top end downward to match the arrangement of the first partition plate 101. These slits mesh together to form lattice-shaped legs 103 in a plan view.

[0005] The rectangular top plate 104 covering the upper surface of the legs 103 has horizontal folds 105a, 105b, and 105c that divide the entire table into four, and the top plate 104 is divided into two symmetrical partial top plates 106 and 107 at the position of the central horizontal fold 105b. Furthermore, the plurality of first partition plates 101 have vertical folds 108a, 108b, and 108c that divide the entire table into four.

[0006] In the cardboard bed 100, the top plate 104 is bent in an M shape when viewed from the front in the stored state (see FIG. 11(c)). Also, each of the first partition plates 101 is bent in an M shape when viewed from above in the stored state (see FIG. 11(c)). [Prior art documents] [Non-patent literature]

[0007] [Non-Patent Document 1] "Disaster Preparedness "Patto! Bed!" (Cardboard Bed)", [online], Taiyo Industry Co., Ltd., [Retrieved February 16, 2022], Internet<https: / / www.taiyo-industry.co.jp / jigyo / prevention-goods> Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the stored state of the conventional cardboard bed 100, as shown in Figure 11(a), the first partition plate 101 is bent into a mountain shape at the vertical folds 108a and 108c, and the bent portion of the first partition plate 101 and a part of the second partition plate 102 protrude from the top plate 104. Therefore, in the stored state of the cardboard bed 100, the bent portion of the first partition plate 101 and a part of the second partition plate 102 protrude from the top plate 104, forming a protruding portion 109 as shown in Figure 11(b).

[0009] That is, cardboard bed 100 employs a configuration in which the structure supporting the load from top plate 104 (specifically, leg portion 103 consisting of first partition plate 101 and second partition plate 102) is moved to the side of top plate 104 in the stored state. Therefore, protruding portion 109 is created in the stored state.

[0010] The present invention was made in consideration of the above circumstances, and aims to realize a multipurpose folding table in which the structure that supports the load from the top plate does not protrude from the top plate when folded, and in which there are no protruding parts when stored. [Means for solving the problem]

[0011] The present invention provides a multipurpose folding table including at least a side plate portion having a first bellows plate and a second bellows plate, a top plate that covers the upper side of the side plate portion in use, and a central support portion that supports the central portion of the top plate, The side plates have notches on the first and second bellows plates. Bite The two are combined to form a flexible structure in the longitudinal direction. The top plate is formed so that a fold line is formed in the center of the top plate in a direction intersecting the longitudinal direction of the side plate portion, and can be bent into a mountain shape so that the area near the fold line is the highest when viewed from the front, The central support is attached to the underside of the center of the tabletop. In the stored state, when the side plate portions are compressed in the longitudinal direction and the top plate is bent, the central support portion rises to a position where it does not interfere with the side plate portions.

[0012] In the present invention, the fold may consist of a first fold and a second fold, the top plate may have a top portion between the first fold and the second fold and a slope portion other than the top portion, and the central support portion may have a support portion main body attached to the underside of the top portion and a guide plate connecting the support portion main body and the underside of the slope portion.

[0013] In the present invention, the side plate portion may be made up of a first side plate portion and a second side plate portion arranged in the same direction, and may further include a connecting portion connecting the first side plate portion and the second side plate portion.

[0014] In the present invention, the connecting portion may consist of a first connecting portion and a second connecting portion arranged at a required distance, and may be configured such that, in use, the central support portion is located between the first connecting portion and the second connecting portion.

[0015] In the present invention, the connecting portion may have a bent portion that is bent in a U-shape in plan view.

[0016] In the present invention, the side plate portions, top plate, central support portion, and connecting portion may all be formed from corrugated cardboard.

[0017] In the present invention, a front panel portion that becomes a front panel and a rear panel portion that becomes a rear panel in an in-use state may be provided connected to both ends of the top panel.

[0018] In the present invention, the shapes and sizes of the side panels, top panel, and central support portion may be specified so that the device can be used as a bed. [Effects of the Invention]

[0019] In the present invention, the multipurpose folding table includes at least a side plate portion having a first bellows plate and a second bellows plate, a top plate that covers the upper side of the side plate portion in use, and a central support portion that supports the central portion of the top plate. Bite The tabletop is formed so that it can be freely extended and retracted in the longitudinal direction. The tabletop has a fold line formed in the center of the tabletop in a direction that intersects with the longitudinal direction of the side panels, and is formed so that it can be bent in a mountain shape so that the area near the fold line is the highest when viewed from the front. The central support part is attached to the underside of the center of the tabletop, and when the side panels are compressed in the longitudinal direction and the tabletop is bent in the stored state, the central support part rises to a position where it does not interfere with the side panels.

[0020] In the present invention, the central support portion that supports the load from the tabletop does not protrude from the tabletop in the stored state, and no protrusions occur. In the present invention, the first and second bellows plates do not extend beyond the range of the tabletop when folded, and are not exposed to the outside. According to the present invention, a multipurpose folding table can be realized that can be stored in a compact, thin shape with no protrusions. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a perspective view of a multipurpose folding table according to an embodiment, seen obliquely from above in use. [Figure 2] FIG. 2 is a plan view of the multipurpose folding table according to the embodiment, seen from above in use. [Figure 3] FIG. 3 is a perspective view of the multipurpose folding table of FIG. 1, viewed from diagonally above in an inverted state. [Figure 4] FIG. 4 is a front view of the multipurpose folding table of FIG. 1, seen from the front direction, in a state immediately after the start of folding. [Figure 5] Figure 5(a) is a front view of the multipurpose folding table of Figure 1 when it is about halfway folded, and Figure 5(b) is a front view of the multipurpose folding table of Figure 1 when it is completely folded. [Figure 6] FIG. 6 is a plan view of the multipurpose folding table according to the embodiment, with the top plate unfolded and placed flat on a flat surface. [Figure 7] Figure 7(a) is a plan view of the first accordion plate of the multipurpose folding table of the embodiment in the state where it is unfolded and laid flat on a flat surface, and Figure 7(b) is a plan view of the second accordion plate of the multipurpose folding table of the embodiment in the state where it is unfolded and laid flat on a flat surface. [Figure 8]Figure 8(a) is a plan view of the multipurpose folding table of the embodiment in the state where the connecting parts are unfolded and laid flat on a flat surface, Figure 8(b) is a plan view of the central support part of the multipurpose folding table of the embodiment in the state where the central support parts are unfolded and laid flat on a flat surface, and Figure 8(c) is a plan view of the multipurpose folding table of the embodiment in the state where the guide plates are unfolded and laid flat on a flat surface. [Figure 9] FIG. 9(a) is a side view of the elastic band, and FIG. 9(b) is a perspective view of a multipurpose folding table according to a modified embodiment, viewed diagonally from above in an inverted state. [Figure 10] FIG. 10 is a plan view showing a conventional folding table in use. [Figure 11] 11(a) is a plan view showing the folding table of FIG. 9 in the middle of folding, FIG. 11(b) is a side view showing the folding table of FIG. 9 in the middle of folding, and FIG. 11(c) is a front view showing the folding table of FIG. 9 in the middle of folding. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the following embodiments are merely examples of the present invention and are not intended to limit the scope of the present invention, its applications, or its uses.

[0023] In this specification, the up-down, left-right, and front-rear directions are defined based on the way the chair is placed in use, with the top panel 14 visible directly below it when viewed from above. As shown in Figures 1 and 2, the left-right direction refers to the direction that coincides with the longitudinal direction of the first side panel 13a and the second side panel 13b. The front-rear direction refers to the direction that coincides with the longitudinal direction of the fold 18.

[0024] This embodiment is a bed 1 for use in evacuation shelters in the event of a natural disaster. The bed 1 includes a side plate portion 13 having a first bellows plate 11 and a second bellows plate 12, a top plate 14 that covers the upper sides of the side plate portions 13 when in use, and a central support portion 15 that supports the center of the top plate 14 when in use.

[0025] [Bed in use] The bed 1 in the state where the top panel 14 is unfolded (hereinafter referred to as the "used state") will be described with reference to Figs.

[0026] As shown in Figure 2, bed 1 has a square shape (980mm x 980mm) when viewed from above in use. If two beds 1 are placed side by side, they will be the same size as a regular-sized bed (1960mm x 980mm). Bed 1 is equivalent to a multipurpose folding table.

[0027] The side plate portion 13 is formed by the notches of the first bellows plate 11 and the second bellows plate 12. Bite The first bellows plate 11 and the second bellows plate 12 are fitted together to be stretchable in the longitudinal direction. Each of the first bellows plate 11 and the second bellows plate 12 is a rectangular member, but as shown in Figure 3, they have mountain folds and valley folds along their length. The first bellows plate 11 and the second bellows plate 12 are each folded in a zigzag shape, and their slits fit together to form side plate portions 13.

[0028] The side plate portion 13 consists of a first side plate portion 13a and a second side plate portion 13b that are arranged in the same direction. The first side plate portion 13a is a member for supporting one side of the bed 1. The second side plate portion 13b is located opposite the first side plate portion 13a and is a member for supporting the other side of the bed 1.

[0029] The top plate 14 has a fold 18 formed in its center in a direction intersecting the longitudinal direction of the side plate portions 13 (front-to-back direction in FIG. 2). Specifically, the fold 18 consists of two folds, a first fold 19 and a second fold 20. The top plate 14 is formed so that it can be bent into a mountain shape so that the fold 18 portion is the highest when viewed from the front (see FIG. 5). The top plate 14 has a top portion 21, which is the area between the first fold 19 and the second fold 20, and a slope portion 22, which is the area other than the top portion 21. The slope portion 22 is connected to both the left and right ends of the top portion 21.

[0030] A front panel 41, which becomes a front panel when in use, and a rear panel 42, which becomes a rear panel when in use, are arranged continuously at both ends of the top panel 14. The front panel 41 is a member that supports the head side of the user when in use. The rear panel 42 is a member that supports the toes side of the user when in use. When two beds 1 are used side by side, the front panel 41 and the rear panel 42 also serve as members that support the back and waist area of ​​the user.

[0031] The central support part 15 is attached, for example, by adhesive to the underside of the central part of the top plate 14. The central support part 15 includes a support part body 16 attached to the underside of the top part 21, and a guide plate 17 connecting the support part body 16 and the underside of the slope part 22.

[0032] A connecting portion 23 is attached between the first side plate portion 13a and the second side plate portion 13b, connecting them. The connecting portion 23 is made up of a first connecting portion 23a and a second connecting portion 23b, which are spaced a required distance apart. Specifically, each connecting portion 23a, 23b has a bent portion 24 that is bent in the shape of the Japanese katakana character "U." As shown in FIG. 3, in use, the central support portion 15 is located between the first connecting portion 23a and the second connecting portion 23b.

[0033] The side plate 13, top plate 14, central support portion 15, and connecting portion 23 are all made of corrugated cardboard. Hook-and-loop fasteners 51 are attached to the corners of the top plate 14 as fastening means for maintaining the shape in the stored state. One hook-and-loop fastener 51 is provided on the first side plate 13a side, and one on the second side plate 13b side. The hook-and-loop fastener 51 has a loop-shaped fastener surface, and a hook-shaped fastener surface (not shown) that engages with this is attached to the top plate 14.

[0034] [About the bed in storage] The bed 1 in a state where the top panel 14 is folded (hereinafter referred to as the "stored state") will be described with reference to Figs.

[0035] When storing the bed 1, as shown in Figure 4, which shows the state immediately after folding has begun from the front, first, both ends of the first side plate portion 13a and the second side plate portion 13b, which are made up of the first bellows plate 11 and the second bellows plate 12, are compressed toward the center in the longitudinal direction, and the top portion 21 of the top plate 14 is lifted upward.

[0036] As a result, the first fold 19 and the second fold 20 become mountain fold lines, and the top panel 14 is folded into a mountain shape in side view. At this time, the central support part 15 attached to the underside of the top part of the top panel 14 rises to a position where it does not interfere with the side plate parts 13, as shown in Figures 4 to 5(a). Specifically, of the central support part 15, the support part main body 16 attached to the underside of the top part 21 rises without changing its shape. Meanwhile, the guide plate 17 connecting the support part main body 16 and the underside of the slope part 22 rises as the folding progresses at the valley fold line 17a.

[0037] Finally, the bed 1 is completely folded into the shape shown in Fig. 5(b), and the hook-and-loop fasteners 51 are engaged to maintain the folded state. When the bed 1 is in the stored state, the central support portion 15, which is a structure that supports the load of the central portion of the top plate 14, is stored under the top portion 21 of the top plate 14. The folded first accordion plate 11 and second accordion plate 12 also do not extend beyond the range of the top plate 14 and are not exposed to the outside. When the bed 1 is in the stored state, there are no structures that protrude from the top plate 14 to form protruding portions.

[0038] [About the composition of each component] In this embodiment, the shapes and sizes of the side plate portions 13, the top plate 14, and the central support portion 15 are specified so that the bed 1 can be used for multiple purposes. The configuration of each member will be described below with reference to Figs. 6 to 8.

[0039] The top panel 14, front panel 41, and rear panel 42 are each made of a single piece of corrugated cardboard with the corrugation direction aligned longitudinally. The corrugated cardboard piece shown in FIG. 6 has a length of 1580 mm in the left-right direction and a length of 980 mm in the front-to-back direction. The top panel 14 has a first fold 19 and a second fold 20, which are mountain folds. A peak 21 is formed in the center of the top panel 14 in the longitudinal direction, and sloped surfaces 22 are formed on the left and right sides of the center 21. The left and right sloped surfaces 22 are connected to the front panel 41 and the rear panel 42 via mountain folds 41a and 42a, respectively. As an example of dimensions, the width of the peak 21 is 80 mm, the width of the sloped surfaces 22 is 450 mm, and the widths of the front panel 41 and the rear panel 42 are 300 mm.

[0040] Generally, corrugated cardboard consists of a corrugated piece of paper called the "core" sandwiched between two flat pieces of paper called the "liner." The wavy parts of the core are called "flutes." The "fluted end face," where the flutes appear, has holes formed by the core and liner. The direction in which these holes are formed is the "corrugation direction." Corrugated cardboard has high strength against forces applied in a direction intersecting the corrugation direction, but low strength against forces applied in a direction parallel to the corrugation direction.

[0041] The first bellows plate 11 and the second bellows plate 12 are made of horizontally elongated corrugated cardboard pieces with the corrugations facing the longitudinal direction. The length of the corrugated cardboard pieces shown in Figures 7(a) and 7(b) is 1260 mm in the left-right direction and 300 mm in the front-to-back direction.

[0042] The first bellows plate 11 and the second bellows plate 12 have slits 11a, 12a and 11b, 12b formed at required positions, respectively. Specifically, a slit 11a is formed in the middle of the first bellows plate 11, extending downward from the upper end to match the position of the slit 12a in the second partition plate 102. On the other hand, a slit 12a is formed in the middle of the second bellows plate 12, extending upward from the lower end to match the position of the slit 11a in the first partition plate 101. These slits are interlocked to form a first side plate portion 13a and a second side plate portion 13b. The slits 11b, 12b are connected to a first connecting portion 23a and a second connecting portion 23b. BiteThese are cuts for fitting together, and all of them are formed upward from the bottom end.

[0043] The first connecting portion 23a and the second connecting portion 23b are made of horizontally elongated corrugated cardboard pieces with the corrugation direction facing the longitudinal direction. The length of the corrugated cardboard piece shown in Figure 8(a) is 1370 mm in the left-right direction and 300 mm in the front-to-back direction.

[0044] A slit 23aa is formed in a required position in the first connecting portion 23a. Specifically, a slit 23aa is formed in the middle of the first connecting portion 23a, extending downward from the upper end to coincide with the positions of slits 11b and 12b in the first connecting portion 23a and second connecting portion 23b where the first connecting portion 23a intersects. A slit 23ab is also formed in the first connecting portion 23b.

[0045] Of the central support part 15, the support part body 16 is made of a horizontally long corrugated cardboard piece with the corrugation direction facing the short side. The length of the corrugated cardboard piece shown in Figure 8(b) is 1065 mm in the left-right direction and 300 mm in the front-back direction. The support part body 16 has slits 16a formed at required positions. The slits 16a are connected to the guide plate 17. Bite These are cuts for fitting together, and all of them are formed upward from the bottom end.

[0046] The guide plate 17 of the central support part 15 is made of a piece of corrugated cardboard with the corrugation direction facing the short side. The length of the piece of corrugated cardboard shown in Figure 8(c) is 520 mm in the left-right direction and 220 mm in the front-back direction. The guide plate 17 has a cut 16a of the support part main body 16 and a cut 16b of the support part main body 16 at a required position. Bite A slit 17b for alignment is formed downward from the upper end. Two guide plates 17 are used in the bed 1. Two valley fold lines 17a are provided on the guide plate 17. When the bed 1 is stored, the guide plate 17 is pressed by the sloped portion 22 of the top plate 14 and is folded at the valley fold lines 17a.

[0047] All of the components described above are made of cardboard, and each cut BiteBed 1 is made by fitting the pieces together and joining the overlapping parts with adhesive.

[0048] [Effects of this embodiment] In this embodiment, the bed 1 includes a first bellows plate 11 and a second bellows plate 12. Bite The bed 1 comprises side plates 13 fitted together, a top plate 14 that covers the upper sides of the side plates 13 in the in-use state, and a central support portion 15 that supports the load applied to the central portion of the top plate 14. The angle of the folded portions of the first bellows plate 11 and the second bellows plate 12 of the side plates 13 can be freely changed, allowing the side plates 13 to expand and contract in the longitudinal direction. A fold 18 is formed in the central portion of the top plate 14 in a direction that intersects with the longitudinal direction of the side plates 13 in the in-use state. The bed 1 can be folded in a mountain shape so that the vicinity of the fold 18 is highest when viewed from the front. The central support portion 15 is attached to the underside of the central portion of the top plate 14. In the stored state, when the side plates 13 are compressed in the longitudinal direction and the top plate 14 is folded, the central support portion 15 rises to a position where it does not interfere with the side plates 13.

[0049] In the bed 1, the central support part 15 that supports the load from the top plate 14 does not protrude from the top plate 14 in the stored state, and no protrusion occurs. In the bed 1, the first bellows plate 11 and the second bellows plate 12, when folded, do not extend beyond the range of the top plate 14 and are not exposed to the outside. The bed 1 is a multipurpose folding table that can be stored in a compact, thin shape with no protrusions.

[0050] In this embodiment, the fold 18 consists of a first fold 19 and a second fold 19. The top plate 14 has a top portion 21 between the first fold 19 and the second fold 20, and a sloped portion 22 other than the top portion 21. The top portion 21 has a required width (specifically, 80 mm). Therefore, in this embodiment, the central support portion 15 can be easily provided below the top plate 14. In addition, the central support portion 15 has a support portion main body 16 attached to the underside of the top portion 21, and a guide plate 17 connecting the support portion main body 16 and the underside of the sloped portion 22.

[0051] If the guide plate 17 were not present and the central support portion 15 were composed only of the support portion body 16, the strength of the central support portion 15 would be insufficient when in use, and the width of the top portion 21 would have to be designed to be large. In contrast, in this embodiment, the central support portion 15 is composed of the support portion body 16 attached to the underside of the top portion 21 and the guide plate 17 that connects the support portion body 16 and the underside of the sloped portion 22 and is folded when stored, thereby improving the strength of the central support portion 15 when in use. Furthermore, in this embodiment, the width of the top portion 21 can be made as small as possible, making it possible to slim the width of the bed 1 when stored.

[0052] However, guide plate 17 may be provided as needed, taking into consideration manufacturing costs, etc. If guide plate 17 is not provided, central support portion 15 may be shaped like a rectangular parallelepiped. In this case, top plate 14 is designed so that top portion 21 is slightly wider, and the back surface of top portion 21 and the upper surface of rectangular central support portion 15 are adhered with double-sided tape.

[0053] In this embodiment, the side plate 13 is made up of a first side plate 13a and a second side plate 13b that are arranged in the same direction, and includes a connecting portion 23 that connects the first side plate 13a and the second side plate 13b. This increases the stability of the first side plate 13a and the second side plate 13b when the bed 1 is in use.

[0054] In this embodiment, the connecting portion 23 is made up of a first connecting portion 23a and a second connecting portion 23b that are arranged at a required distance. When in use, the central support portion 15 is located between the first connecting portion 23a and the second connecting portion 23b. Therefore, when the bed 1 is in use, it is possible to sufficiently support the load around the central support portion 15.

[0055] In this embodiment, the first connecting portion 23a and the second connecting portion 23b have a bent portion 14 that is bent in a U-shape in a plan view. Therefore, when the bed 1 is in use, the first connecting portion 23a and the second connecting portion 23b are arranged so as to surround the periphery of the central support portion 15, improving the space efficiency of the structure that supports the load below the top plate 14.

[0056] In this embodiment, the side panels 13, top panel 14, central support 15, and connecting portion 23 are all made of cardboard, which makes them easy to dispose of as burnable waste after a certain period of use, providing an environmentally friendly product.

[0057] In this embodiment, a front panel portion 41 that becomes the front panel when in use and a rear panel portion 42 that becomes the rear panel when in use are connected to both ends of the top panel 14. In the bed 1, these are made from a single piece of cardboard, which makes it possible to reduce the number of parts.

[0058] In this embodiment, the shapes and sizes of the side panels 13, top panel 14, and central support portion 15 are specified so that the bed 1 can be used as a bed. In particular, in this embodiment, the size of the bed 1 is specified so that when two beds are placed side by side, the bed 1 has the same size as a regular-sized bed. Therefore, the purpose of use of the bed 1 is not limited, and it can also be used as a table or chair if necessary in life at an evacuation shelter.

[0059] [Modification of the embodiment] In the above-described embodiment, as shown in FIG. 9(b), a rubber string 25 may be stretched between the longitudinal center of the first side plate 13a and the longitudinal center of the second side plate 13b. The rubber string 25 has appropriate elasticity, and as shown in FIG. 9(a), both ends of the rubber string 25 are provided with a knotted locking portion 25a. The first side plate 13a and the second side plate 13b each have a slit of a required length in the longitudinal center extending upward from the lower end (or downward from the upper end in FIG. 9(b)). The locking portion 25 is then sandwiched between the slits to attach the rubber string 25 between the first side plate 13a and the second side plate 13b.

[0060] In this way, when the top panel 14 is opened to set up the bed 1, the action of the elastic cords 25 prevents the first side panel 13a and the second side panel 13b from being distorted outward, allowing the first bellows plate 11 and the second bellows plate 12 to unfold smoothly. Therefore, compared to when the elastic cords 25 are not provided, the bed 1 can be unfolded into the usable state more quickly.

[0061] Furthermore, when storing the bed 1, the distance between the first side plate portion 13a and the second side plate portion 13b is kept constant by the action of the elastic cords 25, which allows the first bellows plate 11 and the second bellows plate 12 to be folded smoothly. Therefore, compared to a case in which the elastic cords 25 are not provided, the bed 1 can be folded into the stored state more quickly. Note that in the modified example of Figure 9(b), the positions at which the elastic cords 25 are provided and the number of elastic cords 25 attached are not particularly limited.

[0062] In the above-described embodiment, the bed 1 is not limited to a square shape when viewed from above, but may also be a rectangular shape.

[0063] In the above-described embodiment, the zigzag shapes of the first bellows plate 11 and the second bellows plate 12 are not limited to a single folding pattern consisting of a set of mountain folds and valley folds, and may be repeated two or more times. [Industrial Applicability]

[0064] The present invention can be applied to a wide range of purposes, such as beds, chairs, sofas, tables, luggage racks, and stepladders. [Explanation of symbols]

[0065] 1 bed (multipurpose folding table) 11 First bellows plate 12 Second bellows plate 13 Side plate part 13a First side plate part 13b Second side plate part 14 Top plate 15 Central support 16 Support body 17 Guide plate 18 creases 19 First fold 20 Second fold 21 Top 22 Slope 23 Connecting part 23a 1st connection part 23b 2nd connection part 24 Bend 41 Front plate part 42 Rear plate part

Claims

1. A multipurpose folding table including at least a side plate portion having a first bellows plate and a second bellows plate, a top plate that covers an upper side of the side plate portion in a use state, and a central support portion that supports a central portion of the top plate, the side plate portion is formed so as to be expandable and contractible in the longitudinal direction by engaging the notches of the first bellows plate and the second bellows plate, The top plate is formed so that a fold line is formed in a central portion of the top plate in a direction intersecting with the longitudinal direction of the side plate portion, and can be bent into a mountain shape so that the vicinity of the fold line is the highest when viewed from the front, The central support portion is attached to a lower surface of a central portion of the top plate, In the stored state, when the side plate portions are compressed in the longitudinal direction and the top plate is folded, the central support portion rises to a position where it does not interfere with the side plate portions.

2. the fold comprises a first fold and a second fold, the top plate includes a top portion between the first fold and the second fold and a slope portion other than the top portion, 2. The multipurpose folding table according to claim 1, wherein the central support comprises a support body attached to the underside of the top portion, and a guide plate connecting the support body and the underside of the sloped portion.

3. The side plate portion includes a first side plate portion and a second side plate portion that are arranged in the same direction, The multipurpose folding table according to claim 1 or 2, further comprising a connecting portion that connects the first side plate portion and the second side plate portion.

4. The connecting portion comprises a first connecting portion and a second connecting portion arranged at a required distance, 4. The multipurpose folding table according to claim 3, wherein, in a use state, the central support portion is located between the first connecting portion and the second connecting portion.

5. The multipurpose folding table according to claim 4 , wherein the connecting portion has a bent portion that is bent in a U-shape in plan view.

6. 4. The multipurpose folding table according to claim 3, wherein the side panels, the top panel, the central support section, and the connecting section are all made of corrugated cardboard.

7. 3. The multipurpose folding table according to claim 1, wherein a front panel portion that becomes a front panel and a rear panel portion that becomes a rear panel in use are connected to both ends of the top panel.

8. The multipurpose folding table according to claim 3 , wherein an elastic cord is stretched between the first side plate portion and the second side plate portion.

9. 3. The multipurpose folding table according to claim 1 or 2, which can be used as a bed.

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