Cardboard Bed

Abstract

To provide a cardboard bed which does not occupy a large space in storage or the like and has resistance to a load or deformation.SOLUTION: A cardboard bed comprises: a width direction member comprising a horizontal plate part extending in a bed width direction and a vertical slit of a vertical plate part; an end part member comprising a vertical holding part, a horizontal folding part continuous to the vertical folding part, and a horizontal slit of the horizontal folding part; and a vertical direction member comprising a vertical plate part extending in a bed longitudinal direction, a plurality of vertical slits provided on the vertical plate part, and a horizontal slit horizontally provided. The vertical slit of the vertical direction member has a width at which two vertical plate parts of the width direction member or the end part member can be engaged. A plurality of rows are arranged in which the vertical direction members are directed reversely and two vertical direction members are arranged. The end part member is arranged on each of front / rear end parts, the width direction member is arranged therebetween, two vertical plate parts of the width direction member or the end part member are inserted into each vertical slit of the vertical direction member and engaged, and the horizontal slits of the vertical direction member and the end part member are engaged.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a simple bed made of corrugated cardboard. [Background technology]

[0002] Assembled furniture using foam boards and plastic corrugated cardboard is proposed in Patent Document 1. Patent Document 2 proposes beds and headboards made of plastic corrugated cardboard as assembled furniture.

[0003] Furthermore, Patent Document 3 proposes a collapsible simple bed made of cardboard sheets as a simple bed to be used in evacuation shelters in the event of a disaster. This collapsible simple bed is made of cardboard sheets and includes a first sheet in which a leg sheet is laminated on one side of a top sheet to serve as legs for supporting the top sheet, and a second sheet for reinforcing the legs, and the leg sheet of the first sheet opens from the center like a double door to form one or more pairs of legs facing each other, and the second sheet is assembled so as to bridge the pair of legs. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 6-311918 [Patent Document 2] Utility Model Registration No. 3229918 [Patent Document 3] Utility Model Registration No. 3229660 Summary of the Invention [Problem to be solved by the invention]

[0005] The knock-down furniture described in Patent Documents 1 and 2 is a knock-down type that uses foam boards and plastic corrugated cardboard, and is intended to be carried on picnics and used outdoors. However, plastic corrugated cardboard is an expensive material, and it is not easy to dispose of or recycle after use. In addition, the foam boards do not have sufficient strength. It is described that the invention in Patent Document 1 can also be applied to beds, but only examples of small furniture such as a single-person seat chair or a side table are described, and it is difficult to make large furniture such as a bed with sufficient strength.

[0006] Patent Document 2 refers to application to a bed. The fixed plate has many wide slits that engage with two legs, but the slits at both ends are narrow slits that engage with only one leg. The legs of the folded plate are engaged with these slits to form the shape of the bed. One leg of the folded plate on both sides is engaged with the narrow slit at the end. The ends of the fixed plate outside the narrow slits are shaped to protrude on both sides of the formed bed. It is believed that a certain level of strength can be obtained by combining the approximately channel-shaped folded plate in a lattice shape perpendicular to the fixed plate. However, since the approximately channel-shaped folded plate is formed over the vertical length of the bed, the folded plate or the first plate-like body before folding is a member having a length of nearly 2 m even before assembly. Therefore, even before assembly, storage and transportation are difficult, and the advantage of being an assembled type is small.

[0007] In the bed of Patent Document 2, five folded plates are arranged so that their base parts are positioned on a plane to form a sleeping surface. However, it is difficult to precisely align the shapes and dimensions of the folded plates, and some degree of unevenness occurs in the height of the base parts. The step caused by this unevenness occurs along the entire length of the bed. When a user lies down on the bed, the step is felt all over the body, which is uncomfortable.

[0008] The cot in Patent Document 3 uses cardboard. It uses a 10 mm thick cardboard sheet with a two-layer structure in which two sheets of medium are sandwiched between three liners (paragraph 0017 of the same document). It is equipped with a first sheet in which a top sheet forming the top plate and a leg sheet forming the legs for supporting the top plate are laminated together by bonding, and the second sheet is assembled so as to bridge the pair of legs.

[0009] This first sheet is a heavy and large member that is an integrated unit of a top sheet that forms the top surface of the bed and a leg sheet that opens like a double door to form the legs. At least one of the top sheet or the leg sheet has a groove that acts as a folding line, so that it can be folded in two, but it is still a fairly large member and is not easy to store or move. In addition, providing such a groove leads to a decrease in strength. Furthermore, such a complex first sheet is expensive. The structure in which the second sheet is assembled to bridge the pair of legs is not very strong, and there is almost no force to prevent deformation, especially near the floor surface.

[0010] To provide a cardboard bed which does not take up space during storage or transportation and is resistant to load and deformation. [Means for solving the problem]

[0011] In order to solve the above problems, the cardboard bed of the present invention comprises a rectangular horizontal plate section extending in the width direction of the bed, vertical plate sections extending downward from both side ends of the horizontal plate section, and a number of width direction members formed of cardboard plates with a number of vertical slits provided on the lower end sides of the vertical plate sections; a rectangular horizontal plate portion extending in the width direction of the bed, a vertical plate portion extending downward from a first end of the horizontal plate portion, a vertical fold portion extending downward from a second end of the horizontal plate portion, a horizontal fold portion extending horizontally toward the vertical plate portion following the vertical fold portion, and two end members formed of corrugated cardboard having a horizontal slit provided horizontally from the tip of the horizontal fold portion; The bed has a vertical plate portion extending in a band-like shape in the length direction of the bed, a plurality of vertical slits provided on the lower end side of the vertical plate portion, and a plurality of vertical members formed of corrugated cardboard having horizontal slits provided horizontally from either of the two side ends of the vertical plate portion, The steps of the horizontal plate portions of the width direction members and the end members are aligned along the length direction of the bed, The vertical slits in the width direction members and the end members are of a width that allows one longitudinal member to engage therewith, The vertical slit of the longitudinal member is of a width that allows two vertical plate portions of the width direction member or end member to engage with each other. The horizontal slit of the vertical member is of a width that allows one horizontal fold-in portion of the end member to engage with it, In each row, two vertical members are arranged in parallel rows with the sides on which the horizontal slits are provided facing away from each other, and these are arranged in multiple rows, End members are disposed at the front and rear ends, respectively, and a width direction member is disposed therebetween. Two vertical plate portions of the width direction member or end member are inserted into each vertical slit of the longitudinal member and engaged with the vertical slit of the width direction member or end member. The horizontal slits in the longitudinal members engage the horizontal slits in the horizontal fold-out portions of the end members. It is preferable that the vertical members arranged in each row are separated from each other, and that their ends opposite the side on which the horizontal slit is provided are adjacent to each other, and that the two vertical members are joined by engaging one of the vertical plate portions of the same widthwise member with each of the vertical slits at the ends of the adjacent vertical members. It is also preferable that the number of width direction members is three or five. Furthermore, it is preferable that the vertical members arranged in each row are separated from each other, the inner ends of the horizontal slits are brought close to each other, and the two vertical members are joined by engaging one of the vertical plate portions of the same widthwise member with each of the vertical slits at the ends of the adjacent vertical members. Effect of the Invention

[0012] The cardboard bed of this invention can be made with a small amount of material and is strong against load and deformation. It is small before assembly, so it does not take up much space when stored or transported. In addition, there are few types of parts, so it is easy to assemble and disassemble. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view showing an example of a cardboard bed. [Diagram 2] FIG. [Diagram 3] This is an exploded view of the same. [Figure 4] FIG. [Diagram 5] This is an exploded view of the same. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] This is a perspective view showing the first stage of assembling a cardboard bed. [Figure 9] This is a perspective view showing the second stage of assembling the cardboard bed. [Figure 10] This is a perspective view showing the third stage of assembling the cardboard bed. [Figure 11] This is a perspective view showing the fourth stage of assembling the cardboard bed. [Figure 12] FIG. 11 is a perspective view showing another example of a cardboard bed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] The embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an example of a cardboard bed. The cardboard bed 1 has a plurality of width direction members 2, two end members 3, and a plurality of vertical direction members 4. The cardboard bed 1 is generally rectangular, and its shape and dimensions can be selected arbitrarily. In this invention, the long direction of the bed body, that is, the direction along the body of the user when sleeping, is defined as the length direction or vertical direction. Also, the direction perpendicular to the length direction on the top surface of the bed is defined as the width direction. In this example, the dimensions are the same as those of a general single bed, with a length direction of 198 cm and a width direction of 90 cm. Therefore, it is a size that can be used comfortably by most people, including adults, and ordinary futons and blankets can be used as they are. In addition, the height is 30 cm, the distance from the installation surface is sufficient, and even if dust on the floor surface is stirred up, it is difficult for it to reach the user's body, so it is hygienic.

[0015] The number of width-direction members 2 can be selected according to the size of the bed, the required strength, or the thickness of the cardboard board used, but an odd number is preferable. For the above dimensions, using three or five members reduces the amount of material used and still provides sufficient strength. In particular, when the bed height is about 30 cm, using three or five members is preferable. In this example, there are three width-direction members 2.

[0016] The width-directional member 2 will now be described. Fig. 2 is a front view of the width-directional member, and Fig. 3 is a development of the same. The width-directional member 2 is a roughly rectangular corrugated cardboard plate when developed. Two parallel fold lines 5 are provided, each at the same distance from the edge. The portion between the two fold lines 5 is a horizontal plate portion 6, and the outer side is a vertical plate portion 7. The corrugations of the corrugated cardboard plate are perpendicular to the fold lines 5.

[0017] When the two folding lines 5 are folded at right angles, the shape shown in Figure 3 is obtained. The horizontal plate portion 6 is located at the top, and the vertical plate portions 7 extend downward from both sides, forming a channel-like member that is open downward. When assembled into a bed, it is arranged along the width direction of the bed. At this time, the corrugations of the horizontal plate portion 6 run along the length of the bed, and at the vertical plate portion 7, the corrugations of the corrugations run up and down. The thickness of the corrugated cardboard used is 5 mm.

[0018] In this example, the horizontal plate 6 has a length of about 90 cm in the width direction of the bed, and a length of about 40 cm in the length direction of the bed. The height of the vertical plate 7, i.e., the length from the folding line 5 to the edge, is about 30 cm.

[0019] The vertical plate portion 7 has multiple vertical slits 9 along the edge 8. Slits with a depth of half the distance from the edge 9 to the folding line 5 are provided on both edges 9 of the vertical plate portion 7. The number of slits corresponds to the number of rows of vertical members 4 described below, and the width of the slits corresponds to the thickness of one vertical member 4. In this example, there are six slits, each 6 mm wide. These vertical slits are formed from bottom to top when assembled into the bed.

[0020] The end member 3 will be described. FIG. 4 is a front view showing the end member, and FIG. 5 is a development view of the same. Like the width direction member 2, the end member 3 is also a roughly rectangular corrugated board when developed. The outer shape when developed is roughly the same as that of the width direction member 2. One of the opposing edges (upper side in FIG. 5) is the first edge 10, and the other is the second edge 11. Two parallel first folding lines 12a, b are provided, and the distances from the first edge 10 and the second edge 11 are the same, which correspond to the position of the folding line 5 of the width direction member 2. In this example, they are located 30 cm away from the first edge 10 and the second edge 11. In addition, one second folding line 13 is provided between the first edge 10 and the first folding line 12a closer to it. In this example, it is located at a distance from the first edge 10 that is 2 / 3 of the distance between the first edge 10 and the first folding line 12a, specifically, a distance of 20 cm.

[0021] When the first folding lines 12a, b and the second folding line 13 are folded at right angles, the shape shown in FIG. 5 is obtained. The horizontal plate portion 14 is located at the top, the end along the first folding line 12b is the first end, and the other end along the first folding line 12b is the second end. A vertical plate portion 15 continues downward from the first end (first folding line 12b). A vertical fold portion 16 extends downward from the other first folding line 12b, and a horizontal fold portion 17 is formed horizontally toward the vertical plate portion 15 following the vertical fold portion 16. At this time, the corrugations of the corrugated cardboard of the horizontal plate portion 14 are along the length direction of the bed. Also, the corrugations of the corrugated cardboard of the vertical plate portion 16 are along the up-down direction. Also, the corrugated cardboard plate used is the same as that of the width direction member 2, and its thickness is 5 mm.

[0022] The vertical plate portion 15 has vertical slits 18 formed along the second edge 11, similar to the vertical plate portion 7 of the width direction member 2. The number, width, depth and position of the vertical slits 18 are the same as the vertical slits 9 of the vertical plate portion 7 of the width direction member 2.

[0023] Horizontal slits 19 are provided in the horizontal fold-in portion 17 along the first edge 10 at positions opposite to the vertical slits, and the same number of horizontal slits 19 are provided. The depth of the horizontal slits 19 is half the distance between the first edge 10 and the second fold line 13, which is 5 cm in this example. The width of the horizontal slits 19 corresponds to the thickness of one vertical member 4, which is 7 mm in this example.

[0024] The horizontal plate portion 14 has top plate fixing slits 20 on both sides thereof.

[0025] The vertical member will now be described. Figure 6 is a front view showing the vertical member. The vertical member 4 is a roughly rectangular member made of corrugated cardboard. It has a vertical plate portion extending in a strip shape in the length direction of the bed, multiple vertical slits 21 provided on the upper end side of the vertical plate portion, and horizontal slits 22 provided horizontally from either side end of the vertical plate portion.

[0026] The length of the vertical member 4 corresponds to half the length of the bed, which is 99 cm in this example. The height corresponds to the vertical plate parts 7, 15 of the width direction member 2 and the end member 3, which is 30 cm in this example. The thickness of the corrugated board used in this example is 5 mm. The corrugations of the corrugated board run in the vertical direction.

[0027] The number of vertical slits 21 is related to the number of width direction members 2, and in this example, the number of vertical slits 21 is two corresponding to three width direction members 2. As the number of width direction members 2 increases, the number of vertical slits 21 also increases.

[0028] A vertical slit 21a is provided at a position spaced apart from the end where the horizontal slit 22 is provided by a distance corresponding to the length of the horizontal plate portion 14 of the width direction member 2, and a next vertical slit 21b is provided at a distance corresponding to the length of the horizontal plate portion 6 of the width direction member 2. When providing three or more vertical slits 21, the same intervals are repeated to provide the vertical slits 21. In this example, the first vertical slit 21 is provided at a position 30 cm from the end where the horizontal slit 22 is provided, and another vertical slit 21 is provided at a position 30 cm from that position. The depth of this vertical slit 21 is half the height of the width direction member 2, which is 15 cm in this example. The width of the vertical slit 21 is such that two vertical plate portions 7, 15 of the width direction member 2 or the end member 3 can be engaged. In this example, it is 13 mm.

[0029] The position of the horizontal slit 22 corresponds to the height position of the horizontal fold-in portion 17 of the end member 3. In other words, it is provided at a height that is lower than the upper end of the vertical member 4 by the length of the vertical fold-in portion 16 of the end member 3. The depth of the horizontal slit 22 corresponds to half the length of the horizontal fold-in portion 17. The width of the horizontal slit 22 corresponds to the width of the horizontal slit 22, but is about 1 mm wider than the horizontal slit 18 of the horizontal fold-in portion 17, which is 7 mm in this example.

[0030] In this example, a folding line 23 is provided at the center in the length direction. This folding line 23 allows the bag to be folded in half, which is convenient and saves space during storage and transportation.

[0031] In each row, two longitudinal members 4 are arranged with the sides on which the horizontal slits are provided facing away from each other, and these are arranged in multiple parallel rows. Here, two longitudinal members 4 arranged in one row may be connected back to back. This allows the number of members to be reduced. In this case, it is preferable to provide a folding line along the connection portion as well, so that the member can be folded up small during storage and transportation. In this example, one longitudinal member is formed as shown in FIG. 6. Two separate longitudinal members are arranged back to back to form one row. This row corresponds to the number of vertical slits in the width direction members 2 and the end members 3, and in this example, there are six rows. Therefore, twelve longitudinal members 4 as shown in FIG. 6 are used.

[0032] The main body of the bed can be assembled using the width direction members 2, end members 3 and vertical members 4. In this example, a top plate 24 made of corrugated cardboard is also provided. Figure 7 is a plan view of the top plate. The top plate 24 is large enough to cover almost the entire top surface of the bed, and in this example, it is slightly smaller than the top surface of the bed in both length and width. The corrugations of the corrugated cardboard run along the width direction of the bed. Three fold lines 25 are provided at equal intervals along the length direction, allowing it to be folded in four.

[0033] Cut lines 26 are provided at each of the four corners of the top plate 24. An area that will become a fold-in portion 27 is formed inside the cut lines 26. The positions of the cut lines 26 are aligned with the positions of the top plate fixing slits 20 provided in the end member.

[0034] The method of assembling a cardboard bed and the structure of the cardboard bed will be explained. Figures 8 to 11 are perspective views showing the method of assembling a cardboard bed. Here, the explanation will be divided roughly into four stages. Figure 8 shows the first stage, Figure 9 shows the second stage, Figure 10 shows the third stage, and Figure 11 shows the fourth stage.

[0035] FIG. 8 shows the first stage of assembly. The first folding lines 12a, b and the second folding line 13 of the end member are folded in a mountain shape to form the flat plate portion 14, the vertical plate portion 15, the vertical folded portion and the horizontal folded portion 17, and the vertical member 4 is assembled to the vertical slit 18. This operation can be easily performed by facing the flat plate portion 14 downward and inserting the vertical member 4 from above, as shown in FIG. 8a. The vertical slit 21a closest to the horizontal slit 22 of the vertical member 4 is engaged with the vertical slit 18 of the end member 3, and the horizontal slit 19 of the end member 3 is engaged with the horizontal slit 22 of the vertical member 4. In this way, as shown in FIG. 8b, one end member 3 and six vertical members 4 can be firmly assembled. In particular, by engaging the horizontal slit 19 of the end member 3 with the horizontal slit 22 of the vertical member 4, the movement of the tip of the vertical member 4 in the up and down direction is restricted, and the swinging in the plane is also restricted, thereby preventing the deformation of the bed body. This results in the situation shown in FIG. 8b.

[0036] FIG. 9 shows the second stage of assembly. From this point on, it is convenient to perform the work with the flat plate portion 14 facing upward. The width direction member 2 is attached adjacent to the end member 3. One of the vertical plate portions 6 of the width direction member 2 is inserted into the first vertical slit 21a of the longitudinal member 4, and the other into the next vertical slit 21b. The vertical plate portion 15 of the end member 3 is already inserted into the first vertical slit 21a, but this is not a problem because the vertical slit 21 of the longitudinal member 4 is wide enough to insert two vertical plate portions 6, 15. In this example, the second stage is now completed, and the state shown in FIG. 9b is obtained. If more width direction members 2 are used, the third and subsequent vertical slits remain, so further width direction members 2 can be attached.

[0037] The first and second stages of assembly are also carried out for the other end member 3. In this way, two members constituting half of the bed body are formed as shown in Fig. 8b.

[0038] FIG. 10 shows the third stage of assembly. The two members in the state of FIG. 8b after the second stage are aligned so that the end members 3 face in opposite directions. At this time, a row is formed in which two vertical members 4 are arranged back to back, and six rows are formed in this example. At the end where the vertical members 4 are lined up, only one vertical plate portion 7 of the width direction member 2 is inserted into the vertical slit 21b farthest from the end member 3. The last remaining vertical plate portion 7 of the width direction member 2 is inserted into this vertical slit 21b and attached. In each row, one of the vertical plate portions of the same width direction member is engaged with each of the vertical slits 21b at the farthest ends of two adjacent vertical members, thereby joining the two vertical members. The members constituting half of the bed body are firmly joined together, and one bed body portion is assembled as shown in FIG. 10b.

[0039] The end members 3 and width direction members 2 are arranged adjacent to each other with no gaps. The vertical plate members 7, 15 of the end members 3 and width direction members 2 and the vertical members 4 support the entire bed as legs. In particular, the vertical plate portions 7, 15 of the end members 3 and width direction members 2 are inserted closely together in pairs into each of the vertical slits 22 of the vertical members 4, so that they are like two plates with a thickness equivalent to that of the end members 3 and width direction members 2, and are strong against loads in the vertical direction and are less likely to bend or buckle. In addition, the vertical plate portions 7, 15 of the end members 3 and width direction members 2 and the vertical members 4 have high load resistance because the corrugations of the cardboard run along the vertical direction.

[0040] The horizontal plate parts 6, 14 of the end member 3 and the width direction member 2 are aligned on almost the same plane to form the bed surface. Therefore, the bed can be used in this state. Although it is possible that the heights of the horizontal plate parts 6, 14 may differ due to dimensional errors of the end member 3 and the width direction member 2, the resulting step on the bed surface occurs along the width direction of the bed. Therefore, only a part of the body of the user lying on the bed comes into contact with the step, and discomfort caused by the step is mitigated.

[0041] Since the cardboard bed of this example is equipped with a top plate 24, the step caused by uneven heights of the horizontal plate parts 6, 14 of the end member 3 and the width direction member 2 is less noticeable. Figure 11 shows the fourth stage of assembly. Since the top plate 24 has a cut line 26, a tongue-shaped fold is formed by pushing in the area 27 inside the cut line 26. The top plate 24 is spread and placed on the top surface of the bed body formed by the end member 3 and the horizontal plate parts 6, 14 of the width direction member 2. Then, the fold-in part 27 is inserted into the top plate fixing slit 20 of the end member 3. This connects the four corners of the top plate 24 to the end member 3, preventing the top plate 24 from being separated from the bed body. In this way, the assembly work is completed and the cardboard bed is completed (Figure 11b). The double structure of the horizontal plate parts 6, 14 and the top plate 24 increases the strength of the top surface. In this example, the corrugations of the cardboard run along the length of the bed on the horizontal plate portions 6 and 14, and run along the width on the top plate 24. By making the corrugations perpendicular to each other in this way, the strength is increased and deformation and breakage in all directions are prevented.

[0042] As described above, a cardboard bed can be easily assembled. The bed is made up of only three widthwise members, two end members, 12 vertical members, and one tabletop, so there are few types and numbers of parts. There are no small parts that can be lost. Moreover, no special tools are required for assembly. It is also easy to disassemble by simply reversing the steps described above. Therefore, even in a disaster evacuation shelter where there are not enough tools or space to work, it can be assembled easily and quickly, making life in evacuation more comfortable.

[0043] This cardboard bed can be made sturdy even using relatively thin cardboard sheets. Therefore, it is light and can be made cheaply. Because of its structural strength, a bed 30cm high can be realized, and the user's body is kept a sufficient distance from the floor, making it hygienic. In addition, since there are no parts that protrude beyond the bed surface, it does not get in the way when people walk nearby, and it also has excellent design.

[0044] Each part can be folded along the fold lines to make it smaller, making it easier to store and transport. When all parts are packed in a box, the set weighs approximately 10 kg and is a compact rectangular prism measuring 92.5 cm in length, 51 cm in width, and 16.5 cm in height.

[0045] Another embodiment of the cardboard bed will be described. In the previous example, the number of width-direction members was three, but the number can be increased. By increasing the number, the number of vertical plate parts that become legs when assembled into a bed increases, and a larger load capacity can be achieved. On the other hand, if the number of width-direction members is increased too much, the number of parts will increase and the total amount of cardboard used will also increase, resulting in increased weight and cost. In addition, it is preferable that the number of width-direction members is an odd number. This is because an odd number allows two vertical members lined up in a row to have the same shape and to be connected by a width-direction member. Among them, three or five are preferable. In this case, it is the optimal choice to have a high bed strength and to reduce the number of parts and the amount of cardboard used.

[0046] Fig. 12 is a perspective view showing another example of a cardboard bed. This cardboard bed 1 also has a main body made up of a width direction member 2, an end member 3, and a vertical direction member 4. A top plate may also be provided, but since the cardboard bed in this example has a higher strength, no top plate is provided here.

[0047] In this example, five width direction members 4 are provided. The horizontal plate portions 6, 14 of the width direction members 2 and end members 3 are shaped to divide the upper surface of the bed into approximately seven equal parts. In this example, the length of the horizontal plate portions 6, 14 along the length direction of the bed is approximately 29 cm.

[0048] On the other hand, the number of vertical members 4 can be fewer than in the previous example. In this example, 10 members are used arranged in 5 rows. Therefore, there are 5 vertical slits in the width direction members 2 and 5 vertical and horizontal slits in the end members. There are 3 vertical slits in the vertical members 4. Also, if no top plate is provided, there is no need to provide top plate fixing slits in the end members.

[0049] The assembly of the cardboard bed in this example is the same as that of the previous example, and involves steps 1 to 3. [Explanation of symbols]

[0050] 1. Cardboard bed 2.Width direction members 3. End members 4. Vertical members 5. Folding lines 6.Horizontal plate part 7.Vertical plate part 8. Margins 9. Vertical slits 10. First edge 11. Second edge 12. First fold line 13. Second fold line 14.Horizontal plate part 15.Vertical plate part 16. Vertical fold 17. Horizontal fold 18. Vertical slit 19.Horizontal slit 20.Tabletop fixing slit 21. Vertical slit 22.Horizontal slit 23. Folding lines 24. Tabletop 25. Folding lines 26. Cut line 27. Folding section

Claims

1. A rectangular horizontal plate portion extending in the width direction of the bed, vertical plate portions extending downward from both side ends of the horizontal plate portion, and a plurality of width direction members formed of corrugated cardboard having a plurality of vertical slits provided on the lower end sides of the vertical plate portions; a rectangular horizontal plate portion extending in the width direction of the bed, a vertical plate portion extending downward from a first end of the horizontal plate portion, a vertical fold portion extending downward from a second end of the horizontal plate portion, a horizontal fold portion provided horizontally facing the vertical plate portion subsequent to the vertical fold portion, and two end members formed of corrugated cardboard having a horizontal slit provided horizontally from the tip of the horizontal fold portion; The bed has a vertical plate portion extending in a band-like shape in the length direction of the bed, a plurality of vertical slits provided on the upper end side of the vertical plate portion, and a plurality of vertical members formed of corrugated cardboard having horizontal slits provided horizontally from either of the two side ends of the vertical plate portion, The steps of the horizontal plate portions of the width direction members and the end members are aligned along the length direction of the bed, The vertical slits in the width direction members and the end members are of a width that allows one longitudinal member to engage therewith, The vertical slit of the longitudinal member is of a width that allows two vertical plate portions of the width direction member or the end member to engage with each other. The horizontal slit of the vertical member is of a width that allows one horizontal fold-in portion of the end member to engage therewith, In each row, two vertical members are arranged in parallel rows with the sides on which the horizontal slits are provided facing opposite each other, and these are arranged in multiple rows, An end member is disposed at each of the front and rear ends, and a width direction member is disposed therebetween. Two vertical plate portions of the width direction member or the end member are inserted into each vertical slit of the longitudinal member and engaged with the vertical slit of the width direction member or the end member. A cardboard bed in which the horizontal slits of the longitudinal members engage with the horizontal slits of the horizontal fold-out portions of the end members.

2. A cardboard bed as described in claim 1, wherein the vertical members arranged in each row are separated from each other, and the ends opposite the horizontal slit are adjacent to each other, and the two vertical members are connected by engaging one of the vertical plate portions of the same widthwise member with each of the vertical slits at the ends of the adjacent vertical members.

3. 3. A cardboard bed according to claim 2, wherein the number of widthwise members is three or five.

4. A top plate made of corrugated cardboard and having steps along the width direction of the bed is provided on the horizontal plate portions of the width direction members and the end members, and a fold-in portion formed by a cut line is provided at the corners of the top plate, 4. A cardboard bed according to claim 1, wherein the horizontal plate portion of the end member is provided with a top plate fixing slit into which the folded portion of the top plate is inserted.

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