Cardboard beds and living units

Abstract

To provide a corrugated cardboard bed and a living unit with excellent habitability while ensuring ease of assembly.SOLUTION: A corrugated cardboard bed 100 comprises: a plurality of rectangular lower panel pieces 10 arranged adjacent to each other; a plurality of rectangular upper panel pieces 20 arranged adjacent to each other; and a corrugated cardboard side wall 30 having at least one opening 36, 37, and arranged between the plurality of lower panel pieces 10 and the plurality of upper panel pieces 20, and surrounding an area formed by the plurality of lower panel pieces 10 and the plurality of upper panel pieces 20. At least corners of the lower panel piece 10 have lower convex portions 12 protruding downwardly to form lower engaged portions 14, and the side wall 30 has a plurality of lower engaged portions 32 engageable with respective lower engaged portions 14 of the plurality of lower panel pieces 10. By engaging the plurality of lower engaged portions 32 of the side wall 30 with the respective lower engaged portions 14 of the plurality of lower panel pieces 10 arranged adjacent to each other, the plurality of lower panel pieces 10 are connected to each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to cardboard beds and living units. [Background technology]

[0002] In recent years, there has been a demand for improved evacuation shelters in preparation for unforeseen circumstances such as natural disasters. Existing evacuation shelters have various problems, but there is a demand for further improvements in livability, such as ensuring living space and privacy.

[0003] In view of the above problems, various types of prefabricated furniture have been proposed, such as benches, beds, etc. that are easy to assemble. For example, Patent Documents 1 to 5 propose prefabricated units such as prefabricated furniture, disaster preparedness kits, and capsule rooms that use board materials made of cardboard, synthetic resin, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3222348 [Patent Document 2] JP 2012-235819 A [Patent Document 3] Utility Model Registration No. 3219523 [Patent Document 4] JP 2015-209684 A [Patent Document 5] JP 2008-126021 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional prefabricated units as typified by Patent Documents 1 to 5 do not provide sufficient living space, privacy, etc., and are not necessarily excellent in terms of livability.

[0006] The present invention provides a cardboard bed and living unit that is easy to assemble and also provides excellent livability. [Means for solving the problem]

[0007] The cardboard bed of the present invention is A plurality of rectangular lower panel pieces disposed adjacent to one another; A plurality of rectangular upper panel pieces disposed adjacent to one another; a side wall made of cardboard having at least one opening, disposed between the plurality of lower panel pieces and the plurality of upper panel pieces, and surrounding an area formed by the plurality of lower panel pieces and the plurality of upper panel pieces; A cardboard bed comprising: At least a corner of the lower panel piece is formed with a lower protrusion that protrudes downward and forms a lower engaged portion therein; the side wall has a plurality of lower engaging portions engageable with the respective lower engaged portions of the plurality of lower panel pieces; The lower engaging portions of the side walls engage with the lower engaged portions of the adjacent lower panel pieces, thereby connecting the lower panel pieces.

[0008] The dwelling unit of the present invention comprises: A pair of cardboard beds as described above, stacked one above the other and with the openings of each bed positioned at different positions when viewed from above; and a cardboard staircase member positioned below the opening of the upper cardboard bed and adjacent to the longitudinal side of the lower cardboard bed.

[0009] The dwelling unit of the present invention comprises: A rectangular upper panel; A rectangular lower panel; a side wall made of cardboard having at least one opening, disposed between the lower panel and the upper panel, and surrounding an area formed by the lower panel and the upper panel; A pair of cardboard beds stacked one above the other with the longitudinal sides on which the openings are formed facing opposite each other; and a cardboard staircase member positioned below the opening of the upper cardboard bed and adjacent to the longitudinal side of the lower cardboard bed. Effect of the Invention

[0010] According to the present invention, in the cardboard bed, the lower engaging parts of the side walls engage with the lower engaged parts of the adjacent lower panel pieces, thereby connecting the lower panel pieces. This makes it possible to provide a cardboard bed and dwelling unit that is easy to assemble and has excellent livability. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a cardboard bed according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a front view of the cardboard bed. [Diagram 3] FIG. 3 is a rear view of the cardboard bed. [Figure 4] FIG. 4 is a top view of the cardboard bed. [Diagram 5] FIG. 5 is a bottom view of the cardboard bed. [Figure 6] FIG. 6 is an exploded view of a side wall having an opening. [Figure 7] 7 is a front view of the cardboard bed, with a part of the upper edge indicated by the lines AA and BB in FIG. 4 and a part of the lower edge indicated by the lines CC and DD in FIG. 5 cut away. [Figure 8] FIG. 8 is a perspective view of a dwelling unit including a cardboard bed. [Figure 9] FIG. 9 is a front view of the residential unit. [Figure 10] FIG. 10 is a rear view of the dwelling unit. [Figure 11]FIG. 11 is a side view showing the stacking state of the upper panel pieces and the lower panel pieces when two cardboard beds are stacked one above the other. [Figure 12] FIG. 12 is a top view of the dwelling unit. [Figure 13] FIG. 13 is a bottom view of the dwelling unit. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a cardboard bed and a living unit to which the present invention is applied will be described in detail with reference to the drawings.

[0013] 1 to 5, a cardboard bed 100 according to one embodiment of the present invention has a substantially rectangular parallelepiped shape defined by a longitudinal direction X, a lateral direction Y, and a height direction Z. The cardboard bed 100 has a size equivalent to that of a room in a capsule hotel, for example, and at least one person can lie down in the rectangular parallelepiped space formed inside the cardboard bed 100.

[0014] As described below, the cardboard bed 100 is an assembly-type bed formed by assembling panels such as cardboard panels and resin panels, and does not require special tools and has a small number of parts. Therefore, workers can easily assemble the cardboard bed 100. For example, in the event of a disaster, the cardboard bed 100 can be quickly set up in a gymnasium or other location in the disaster area, contributing to a rapid response to the disaster. In addition, the cardboard bed 100 is easy to disassemble, and by stacking the disassembled panels, it can be easily stored and transported.

[0015] The cardboard bed 100 includes two rectangular lower panel pieces 10, two rectangular upper panel pieces 20, a side wall 30 disposed between the two lower panel pieces 10 and the two upper panel pieces 20, and floor boards 40, 41 placed on the lower panel pieces 10. Thus, inside the cardboard bed 100, a rectangular parallelepiped space capable of blocking lines of sight from the outside is secured by the lower panel pieces 10, the upper panel pieces 20, the side wall 30, and the floor boards 40, 41. For example, when the cardboard bed 100 is installed in a disaster area, a disaster victim can lie down in the space inside the cardboard bed 100 that is blocked from lines of sight from the outside. Thus, the cardboard bed 100 can provide a living space that ensures privacy for disaster victims, and can improve the quality of life of disaster victims after the occurrence of a disaster.

[0016] The application of the cardboard bed 100 is not limited to disaster situations, but can also be used inside a normal house to provide a more isolated space, such as a workroom. In other words, the cardboard bed 100 can be used to provide a space that requires privacy in any situation.

[0017] 5 and 7, the rectangular lower panel piece 10 is formed of, for example, a resin panel made of a resin material. In this embodiment, two lower panel pieces 10 are arranged adjacent to each other to form the lower panel of the cardboard bed 100.

[0018] The lower panel piece 10 has approximately quadrangular pyramid-shaped lower convex portions 12 that protrude downward from the base surface at least at the corners of the rectangular shape in a plan view. In this embodiment, a total of nine lower convex portions 12 protrude downward, including the four corners, the middle portions of each side, and the center portion of the base surface. The presence of the lower convex portions 12 improves the strength of the lower panel piece 10. Furthermore, by providing multiple lower convex portions 12, it becomes possible to stably place the lower panel piece 10 on the ground.

[0019] 7, a lower engaged portion 14 that engages with a lower engaging portion 32 (see FIG. 6) of a side wall 30 described later is formed inside the lower protrusion 12. Specifically, the lower engaging portion 32 of the side wall 30 has its outer wall surface in contact with the outward side surface of the lower engaged portion 14, and is further held and engaged by two opposing side surfaces and a bottom surface that are perpendicular to the outward side surface of the lower engaged portion 14. In addition, a central protrusion 15 that protrudes upward is formed in the center of the bottom surface 12A of the lower protrusion 12, and this central protrusion 15 forms a fitting recess 16 that is recessed from the bottom surface 12A when viewed from below. As described below, when a set of cardboard beds 100 are stacked in upper and lower tiers (see FIG. 11), the fitting recess 16 can fit into a fitting protrusion 22 of an upper panel piece 20 described later.

[0020] In addition, at the outer edge portion that forms the outline of the rectangular lower panel piece 10 when viewed in a plane, a lower groove portion 18 is formed along the outer edge portion between adjacent lower protrusions 12, and engages with the lower edge portion between lower engagement portions 32 of the side walls 30 described later.

[0021] The lower panel piece 10 can be formed by a technique such as blow molding or injection molding of a resin material, but the material and manufacturing method are not particularly limited.

[0022] In addition, flat floor panels 41 made of cardboard panels are placed on the base surfaces of the two lower panel pieces 10, and further, one flat floor panel 40 made of a cardboard panel with an area approximately equal to the total area of ​​the two floor panels 41 is placed on top of the two floor panels 41.

[0023] 4 and 7, the rectangular upper panel piece 20 is formed by, for example, a resin panel made of a resin material. In this embodiment, two upper panel pieces 20 are arranged adjacent to each other to form the upper panel of the cardboard bed 100 and provide the function of the roof of the cardboard bed 100.

[0024] An upper groove portion 24 is formed along the outer edge of the rectangular upper panel piece 20, which forms the outline of the upper panel piece 20 when viewed in a plane. This upper groove portion 24 clamps and engages with an upper engagement portion 34 of the side wall 30, which will be described later, thereby connecting the two upper panel pieces 20.

[0025] Additionally, the upper panel piece 20 has at least one mating protrusion 22 that protrudes upward relative to the base surface. In this embodiment, a total of nine mating protrusions 22 protrude upward, including the four corners, the middle parts of each side, and the center part of the base surface. As described above, the mating protrusions 22 can be mated with the mating recesses 16 of the lower panel piece 10 when a set of cardboard beds 100 are stacked one above the other (see FIG. 11).

[0026] The upper panel piece 20, like the lower panel piece 10, can be formed by a technique such as blow molding or injection molding of a resin material, but the material and manufacturing method are not particularly limited.

[0027] As shown in Fig. 6, the side wall 30 is realized by a cardboard panel. The side wall 30 is disposed between the two lower panel pieces 10 and the two upper panel pieces 20, and surrounds the area formed by the two lower panel pieces 10 and the two upper panel pieces 20. In this embodiment, the side wall 30 of the cardboard bed 100 can be formed by using two cardboard panels of the size shown in Fig. 6.

[0028] The side wall 30 has at least one opening. In this embodiment, the side wall 30 has two circular openings 36, 37. The opening 36 has a larger opening area than the opening 37. The large-diameter opening 36 serves as an entrance for people to enter and exit, and the small-diameter opening 37 serves as a window for people inside the cardboard bed 100 to view the scenery outside. The number, shape, and formation position of the openings are not particularly limited.

[0029] The side wall 30 can be folded at a first folding line L1 and a second folding line L2. When the side wall 30 is folded and disposed between the lower panel pieces 10 and the upper panel pieces 20, the area A1 between the first folding line L1 and the second folding line L2 forms the front of the cardboard bed 100 along the longitudinal direction X (see FIG. 1). Meanwhile, the areas A2 and A3 located outside the first folding line L1 and the second folding line L2 form the side of the cardboard bed 100 along the transverse direction Y. Moreover, the region A3 of one side wall 30 is disposed so as to overlap the region A2 of the other side wall 30.

[0030] The side wall 30 has a plurality of lower engagement portions 32 on its lower edge. The lower engagement portions 32 are formed, for example, by partially cutting the lower edge of a rectangular cardboard panel that is the material of the side wall 30, and have a tab-like shape. The lower engagement portions 32 are engageable with the respective lower engaged portions 14 of the lower panel piece 10 (see Figs. 1 and 5).

[0031] For example, a worker places two lower panel pieces 10 adjacent to each other on the ground. The worker then attaches the side wall 30, which has been folded at the first folding line L1 and the second folding line L2, to the two lower panel pieces 10. At this time, the worker attaches the side wall 30 to the two lower panel pieces 10 while adjusting the position so that the positions of the lower engagement portions 32 of the side wall 30 match the positions of the lower protrusions 12 and the lower engaged portions 14 of the two lower panel pieces 10. This operation causes the multiple lower engagement portions 32 of the side wall 30 to engage with the lower engaged portions 14 of the two lower panel pieces 10.

[0032] Two adjacent lower panel pieces 10 are connected via the side walls 30. In other words, the two lower panel pieces 10 are connected without using special tools, connecting members, etc. Therefore, the worker can easily assemble the cardboard bed 100 with excellent livability by securing a space with a predetermined size using the two lower panel pieces 10.

[0033] In the above-mentioned manner, the two side walls 30 are arranged upright by the multiple lower panel pieces 10, thereby realizing the side walls of the cardboard bed 100. However, it is not necessary that both of the two side walls 30 have the openings 36, 37. For example, the cardboard bed 100 of this embodiment is assembled by combining a side wall 30 having the openings 36, 37 with a side wall 30 not having the openings 36, 37 (see Figures 2 and 3). In this case, an opening is formed only on the front of the cardboard bed 100, and no opening is formed on the back. Therefore, it is easy to ensure the privacy of the person entering the cardboard bed 100 while ensuring the convenience of the person entering the cardboard bed 100.

[0034] In this embodiment, the lower cutout 33 is formed between two adjacent lower engagement parts 32, 32, at the center in the longitudinal direction of the region A1 of the side wall 30, among the multiple lower engagement parts 32. As shown in Fig. 7, when the lower engagement part 32 is engaged with each of the lower engaged parts 14 of the two lower panel pieces 10, the lower cutout 33 spans the opposing part P1 where the two lower panel pieces 10 face each other. The deepest part of the lower cutout 33 is at the same height as or higher than the walls of the two lower panel pieces 10 at the opposing part P1 and does not interfere with the walls of the two lower panel pieces 10, so that the side wall 30 can be smoothly attached to the two lower panel pieces 10.

[0035] Furthermore, in this embodiment, at least one of the multiple lower engaging portions 32, two lower engaging portions 32 in this embodiment, is folded to engage with one of the multiple lower engaged portions 14. The folded lower engaging portion 32 engages with the lower engaged portion 14 arranged in a corner of the lower panel piece 10. Since the folded lower engaging portion 32 is positioned in a corner of the cardboard bed 100, the strength of the cardboard bed 100 can be improved.

[0036] Furthermore, the upper edge of the side wall 30 has a plurality of upper engagement portions 34. In this embodiment, the plurality of upper engagement portions 34 are obtained by partially cutting the upper edge of a rectangular cardboard panel that is the material of the side wall 30 to form upper cutout portions 35, which will be described later. The upper engagement portions 34 are connectable to the upper groove portions 24 of the upper panel piece 20 (see FIG. 7).

[0037] For example, after attaching the side wall 30 to the two lower panel pieces 10, the worker attaches the two upper panel pieces 20 to the upper edges of the side wall 30. At this time, the worker attaches the two upper panel pieces 20 to the side wall 30 while adjusting the position so that the upper groove portions 24 of the upper panel pieces 20 match the positions of the upper engagement portions 34 of the side wall 30. By this operation, the multiple upper engagement portions 34 of the side wall 30 engage with the respective upper groove portions 24 of the two upper panel pieces 20.

[0038] A number of adjacently arranged upper panel pieces 20 (two upper panel pieces 20 in this embodiment) are connected via the side walls 30. In other words, the two upper panel pieces 20 are connected without using special tools, connecting members, etc. Therefore, the worker can easily assemble the cardboard bed 100, which has excellent privacy assurance, by securing a lid that closes the space with the two upper panel pieces 20.

[0039] In this embodiment, the upper cutout 35 is formed between the two upper engagement portions 34, 34 at the center in the longitudinal direction of the region A1 of the side wall 30. As shown in Fig. 7, when the upper engagement portion 34 is engaged with each of the upper groove portions 24 of the two upper panel pieces 20, the upper cutout 35 spans the opposing portion P2 where the two upper panel pieces 20 face each other. The deepest portion of the upper cutout 35 is at the same position as the wall of the two upper panel pieces 20 at the opposing portion P2 or at a position lower than the wall and does not interfere with the wall of the two upper panel pieces 20, so that the two upper panel pieces 20 can be smoothly attached to the side wall 30.

[0040] 1, 7, etc., reference numeral 45 denotes a locking portion for connecting the side wall 30 to the lower panel piece 10, and the side wall 30 to the upper panel piece 20, respectively.

[0041] In this embodiment, two lower panel pieces 10 and two upper panel pieces 20 are arranged adjacent to each other. However, three or more lower panel pieces 10 may be arranged adjacent to each other, and three or more upper panel pieces 20 may be arranged adjacent to each other. By arranging a plurality of lower panel pieces 10 and a plurality of upper panel pieces 20 adjacent to each other, the internal space of the cardboard bed 100 can be expanded. In addition, a plurality of lower panel pieces 10 and a plurality of upper panel pieces 20 may be arranged in a matrix shape in both the longitudinal direction, that is, the X direction, and the transverse direction, that is, the Y direction. By changing the longitudinal length of the side wall 30, it is possible to change the number of lower panel pieces 10 and a plurality of upper panel pieces 20 to be connected.

[0042] As shown in Figures 8 to 10, the dwelling unit 200 using the above-mentioned cardboard beds 100 comprises at least one (two) cardboard beds 100 and a cardboard staircase member 50. The dwelling unit 200 is a unit that realizes a more comfortable living environment and also realizes additional functions by being configured using a set of cardboard beds 100 and accessory members such as the staircase member 50.

[0043] A pair of cardboard beds 100 are stacked one above the other, and the openings 36, 37 are arranged in different positions when viewed from above. Specifically, two cardboard beds 100 are stacked one above the other, with the longitudinal sides of the side walls 30 in which the openings 36, 37 are formed facing in opposite directions.

[0044] Since a pair of cardboard beds 100 are stacked on top of each other, a space for two people to lie down can be realized with an exclusive area that is the same as the planar area of ​​a single cardboard bed 100 (the area of ​​the two lower panel pieces 10 or the two upper panel pieces 20 shown in Figures 4 and 5). This makes it possible to more effectively utilize the space in the installation location. In addition, the two cardboard beds 100 are arranged so that the longitudinal sides of the side walls 30 in which the openings 36 and 37 are formed face each other. Therefore, the person entering the upper cardboard bed 100 and the person entering the lower cardboard bed 100 enter and exit the dwelling unit 200 on different sides, allowing smooth entry and exit without the two people meeting each other, and also ensuring a higher level of privacy.

[0045] The staircase member 50 is made of cardboard, just like the side wall 30, and is placed below the opening 36 of the upper cardboard bed 100 and adjacent to the long side of the lower cardboard bed 100 in a set of stacked cardboard beds 100. A person using the upper cardboard bed 100 can enter and exit the opening 36 of the upper cardboard bed 100 by climbing the staircase member 50. On the other hand, since the staircase member 50 is not necessary for the lower cardboard bed 100, the staircase member 50 is not installed on the long side where the opening 36 of the lower cardboard bed 100 is located (see FIG. 10).

[0046] Furthermore, the dwelling unit 200 includes a plurality of exterior wall members 60 that extend in the short direction from each corner of the side wall 30 and are bent to face the long side surface. The exterior wall members 60 block views from the outside, making it possible to ensure a higher level of privacy. The height of the outer wall member 60 is arbitrary, and may be, for example, approximately the same height as the upper cardboard bed 100.

[0047] In addition, a plate-shaped table 70 is attached to the exterior wall member 60, which can improve the functionality and convenience of the dwelling unit 200. The exterior wall member 60 and the table 70 can also be made from cardboard panels.

[0048] As shown in Figure 11, in a set of cardboard beds 100 stacked in upper and lower tiers, the lower panel piece 10 is stacked on top of the upper panel piece 20. At this time, as described above, the fitting recess 16 of the lower panel piece 10 fits into the fitting protrusion 22 of the upper panel piece 20. This allows the set of cardboard beds 100 to maintain a stable stacked state.

[0049] 12 and 13, the staircase member 50 can be constructed by combining multiple cardboard pieces 52 in a lattice pattern under the step surface on which people place their feet. This improves the strength of the staircase member 50, reduces the risk of it collapsing when people stand on it, and improves safety.

[0050] 12 and 13, two chairs 80 made of, for example, cardboard can be added to the dwelling unit 200. The chairs 80 are provided adjacent to the table 70, and a person sitting on the chairs 80 can use the table 70 to perform various tasks, thereby improving the functionality and convenience of the dwelling unit 200.

[0051] The cardboard bed 100 used in the dwelling unit 200 does not necessarily require a plurality of lower panel pieces 10 and a plurality of upper panel pieces 20 as shown in Figs. 1 to 7. The dwelling unit 200 may be assembled using a cardboard bed 100 composed of one rectangular upper panel and one rectangular lower panel. Also, as long as the strength is ensured, three or more cardboard beds 100 can be stacked.

[0052] The present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, etc. In addition, the material, shape, size, numerical value, form, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as they can achieve the present invention, and are not limited. For example, in the dwelling unit 200, the openings 36 for the upper and lower cardboard beds 100 to enter and exit may be located on the same long side as long as they are located at different positions when viewed from above. Even in this configuration, the upper and lower cardboard beds 100 can use a common side wall 30 by folding the side wall 30 so that the front and back surfaces of the area A1 of the side wall 30 are different from each other. [Explanation of symbols]

[0053] 10 Lower panel piece 12 Lower convex part 14 Lower engaged part 16 Fitting recess 18 Lower gutter 20 Upper panel piece 22 Fitting protrusion 24 Upper groove 30 side wall 32 Lower engaging part 33 Lower notch 34 Upper engagement part 35 Upper notch 50 Staircase parts 60 Exterior wall components 70 Table 80 Chair 100 Cardboard Bed 200 residential units

Claims

1. A plurality of rectangular lower panel pieces disposed adjacent to one another; A plurality of rectangular upper panel pieces disposed adjacent to each other and facing each other directly above the lower panel piece; a side wall disposed above the lower panel piece and having at least one opening through which a person can enter and exit, the side wall being made of cardboard and disposed between the plurality of lower panel pieces and the plurality of upper panel pieces and enclosing an area in which at least one person can lie down, the area being formed by the plurality of lower panel pieces and the plurality of upper panel pieces; A cardboard bed comprising: a lower protrusion protruding downward and forming a lower engaged portion therein is formed at a plurality of corners and an intermediate portion between the plurality of corners of the lower panel piece, and the lower protrusion at the intermediate portion is smaller than the lower protrusion at the corner portion when viewed from below; the side wall has a plurality of lower engaging portions engageable with the respective lower engaged portions of the plurality of lower panel pieces; a plurality of lower engaging portions of the side wall engage with the respective lower engaged portions of the plurality of adjacently arranged lower panel pieces, thereby connecting the plurality of lower panel pieces; Cardboard bed.

2. the side wall has a plurality of upper engagement portions that can be engaged with upper groove portions formed on the outer edges of the plurality of upper panel pieces; The upper panel pieces are connected together by engaging the upper engagement portions of the side walls with the upper groove portions of the adjacent upper panel pieces.

2. The cardboard bed according to claim 1.

3. A lower cut portion is formed between two adjacent lower engagement portions among the plurality of lower engagement portions, A cardboard bed as described in claim 1 or 2, wherein when the multiple lower engagement portions are engaged with the respective lower engaged portions of two adjacent lower panel pieces, the lower cut-out portion spans the opposing portions of the two lower panel pieces.

4. At least one of the lower engaging portions is bent to engage with one of the lower engaged portions. A cardboard bed according to any one of claims 1 to 3.

5. A set of cardboard beds, each of which is a cardboard bed according to any one of claims 1 to 4, stacked in upper and lower tiers and with the openings of each bed positioned in different positions when viewed from above; A cardboard staircase member disposed below the opening of the upper cardboard bed and adjacent to a longitudinal side of the lower cardboard bed; A dwelling unit comprising:

6. A plurality of rectangular lower panel pieces arranged adjacent to each other; A plurality of rectangular upper panel pieces disposed adjacent to each other and facing each other directly above the lower panel piece; a side wall disposed above the lower panel piece and having at least one opening through which a person can enter and exit, the side wall being made of cardboard and disposed between the plurality of lower panel pieces and the plurality of upper panel pieces and enclosing an area in which at least one person can lie down, the area being formed by the plurality of lower panel pieces and the plurality of upper panel pieces; A cardboard bed comprising: At least a corner of the lower panel piece is formed with a lower protrusion that protrudes downward and forms a lower engaged portion therein; the side wall has a plurality of lower engaging portions engageable with the respective lower engaged portions of the plurality of lower panel pieces; a plurality of lower engaging portions of the side wall engage with the respective lower engaged portions of the plurality of adjacently arranged lower panel pieces, thereby connecting the plurality of lower panel pieces; A pair of cardboard beds stacked one above the other with the longitudinal sides in which the openings are formed facing opposite each other; A cardboard staircase member disposed below the opening of the upper cardboard bed and adjacent to a longitudinal side of the lower cardboard bed; A dwelling unit comprising:

7. Further comprising a plurality of outer wall members extending in a short direction from each corner of the side wall and bent to face the long side surface.

7. The dwelling unit of claim 6.

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