JP2019218091A - Container structure and its unfolded body - Google Patents

Abstract

To provide a container structure that ensures rigidity to maintain the container shape and its unfolded body.SOLUTION: An unfolded body 1A includes a rectangular bottom wall 4, four side walls 5, 6, 7, 8 respectively connected to four edges a, b, c, d of the bottom wall 4, and a top wall 9 continuously connected via one side wall of the four side walls, and the bottom wall, the four side walls, and the top wall are all positioned on the same plane and form a container when being assembled. On the bottom wall is provided a concave part 42 including a draft 41 with a predetermined depth.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container structure and a developed body thereof.

  Conventionally, a container has a main plate, one and the other side plates continuously provided on both sides of the main plate via a fold, and an inner connection piece continuously provided via a fold at an end of the one side plate. An outer connecting piece connected to an end of the other side plate via a fold, and a plurality of storage articles provided on the one side plate and the other side plate opposed to each other at the time of assembling so as to be able to enter and leave a plurality of articles. And a plurality of partition ribs. The plurality of partition ribs partition the inside of the container in a direction (vertical direction) orthogonal to a direction in which stored articles enter and exit from each side plate. The container is integrally formed by press molding or the like. By forming a plurality of partition ribs, the strength of the container is ensured.

JP-A-2002-68167

  However, the conventional container is configured such that the projecting dimensions of the plurality of partition ribs are small enough to eliminate the draft angle during molding. For this reason, although the strength of the container is ensured, the rigidity for maintaining the shape of the container is not sufficient. That is, it is required to secure rigidity for maintaining the container shape.

  The present invention has been made in view of the above background, and an object of the present invention is to provide a container structure that secures rigidity for maintaining a container shape, and an expanded body thereof.

The above object is solved by the present invention described below.
That is, according to the present invention, a rectangular bottom wall, four side walls connected to four edges of the bottom wall, and one side wall of the four side walls are connected. And a top wall provided, wherein the bottom wall, the four side walls, and the top wall are located on the same plane, and are deployed as containers when assembled, and the bottom wall has a predetermined shape. And a concave portion including a draft with a depth of.

  According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of protrusions erected toward the top wall at the time of assembly extend parallel to the bottom surface of the concave portion. It is characterized by being provided.

  According to a third aspect of the present invention, in the deployment body according to the first or second aspect, each edge of the bottom wall and an edge located at a boundary between the one side wall and the top wall are folded. The four side walls and the top wall are a container structure formed by being bent up from the bottom wall.

  According to the development body of the first aspect, the bottom wall is provided with the concave portion including the draft with a predetermined depth. According to this, since the bottom wall is provided with the concave portion including the draft with a predetermined depth, it is possible to obtain rigidity capable of maintaining the assembled container shape.

  According to the second aspect of the present invention, on the bottom surface of the concave portion, a plurality of protruding portions that are erected toward the top wall during assembly are provided to extend in parallel. According to this, the rigidity can be further increased.

  According to the container structure of the third aspect, the four side walls and the top wall are formed by folding each edge of the bottom wall and the edge located at the boundary between one side wall and the top wall. Container structure. According to this, since the bottom wall is provided with the concave portion including the draft with a predetermined depth, it is possible to obtain rigidity capable of maintaining the shape of the container at the time of assembly.

It is a perspective view showing the deployment object concerning one embodiment of the present invention. (A) is a plan view showing the developed body, and (B) and (C) are side views of the developed body viewed from different directions. It is a perspective view showing signs that a container structure concerning one embodiment of the present invention is assembled. In the container structure, it is a perspective view showing a state where a lid has fully opened an opening of a box main body. In the container structure, it is a perspective view showing a state where a lid has fully closed an opening of a box main body.

  Hereinafter, the present invention, a container structure according to an embodiment which is an exemplary aspect, and a developed body thereof will be described with reference to FIGS. 1 to 5.

  In FIG. 1, reference numeral 1A denotes a developed body (developed body) of the container structure according to one embodiment of the present invention, and reference numeral 1 denotes a container structure according to one embodiment of the present invention. The developing body 1A is for producing the container structure 1. Further, the deployable body 1A is a form in which all parts including the bottom wall 4, the four side walls 5, 6, 7, 8, and the top wall 9 constituting the container structure 1 are located on the same plane. is there.

  The container structure 1 is obtained by assembling a developed body 1A in which one flat plate made of a thermoplastic resin is integrally formed by hot press molding or vacuum molding. The container structure 1 is configured such that four side walls 5, 6, 7, 8 and a top wall 9 are folded up with respect to a bottom wall 4. As the thermoplastic resin, a synthetic resin such as PET (polyethylene terephthalate), PP (polypropylene), PE (polyethylene), PS (polystyrene), or PC (polycarbonate) can be used.

  As shown in FIGS. 4 and 5, the container structure 1 includes a box body 2 having an opening 20 (shown in FIG. 4) above, and a lid 3 that can cover the opening 20 of the box body 2. It is constituted integrally. The box body 2 includes a rectangular bottom wall 4, front and rear side walls 5 and 6 erected from the bottom wall 4 and opposed in the front-rear direction, and left and right side walls erected from the bottom wall 4 and opposed in the left and right direction. 7, 8 are provided.

  Here, in the present embodiment, as shown in FIGS. 4 and 5, in the assembled container structure 1, the facing direction of the front and rear side walls 5, 6 is referred to as "front and rear direction", and the facing side walls 7, 8 are opposed to each other. A direction may be referred to as a “left-right direction”, and a direction orthogonal to the front-rear direction and the left-right direction may be referred to as a “height direction (vertical direction)”. In addition, as shown in FIGS. 1 and 2, the direction in which the left and right side walls 7 and 8 are located as viewed from the bottom wall 4 in the unfolded body 1 </ b> A (sometimes referred to as unfolded state) is referred to as “lateral direction”. The direction in which the front and rear side walls 5 and 6 are located when viewed from the wall 4 is referred to as “front and rear direction”, and is a direction orthogonal to the front and rear direction and the left and right direction, and the thickness direction of the developing body 1A located on the same plane is referred to as “high”. Direction ".

  As shown in FIGS. 1 and 2, the bottom wall 4 includes the front, rear, left and right edges a, b, c, and d, and is located on the same plane as the edges a, b, c, and d. It has a peripheral portion 40 and a concave portion 42 having a slope portion 41 (sometimes referred to as draft).

  The concave portion 42 is for obtaining rigidity capable of maintaining the shape of the container in an assembled state. The concave portion 42 has a gradient portion 41 that is continuous inward (center side) of the bottom wall peripheral edge portion 40, A bottom wall flat portion 43 that is continuous inward and forms the bottom of the concave portion 42, and a bottom wall protrusion 44 (protrusion) formed on the bottom wall flat portion 43. I have.

  The slope portion 41 is inward in the plane of the bottom wall peripheral portion 40 toward one side in the height direction (the depth side in the direction perpendicular to the paper surface in FIG. 1, the side away from the top wall 9 in the assembled state shown in FIG. 4). It is provided so as to be inclined. The slope portion 41 is formed in order to smoothly remove the mold from the developed body 1A during press molding. That is, in the slope portion 41, the vertical dimension T1 and the gradient from the upper end (the bottom wall peripheral portion 40) to the lower end (the bottom wall flat portion 43) are formed to the extent necessary for smoothly extracting the mold. Have been.

  The bottom wall protruding portion 44 is provided to stand upright from the bottom wall flat portion 43 on the other side in the height direction (the near side in the direction perpendicular to the paper surface in FIG. 1, the side approaching the top wall 9 in the assembled state shown in FIG. 4). Have been. The bottom wall protruding portion 44 is formed so as to have a rectangular shape in plan view. That is, the bottom wall protrusion 44 has a predetermined width dimension in the front-rear direction and is formed to extend linearly in the left-right direction. In the present embodiment, the three bottom wall protrusions 44 are arranged in parallel with each other at equal intervals in the front-rear direction.

  As shown in FIG. 4, the front and rear side walls 5 and 6 are a front side wall 5 erected from a front edge a of the bottom wall 4 and a rear side wall erected from a rear edge b of the bottom wall 4. 6 are provided.

  The front side wall 5 is formed in a rectangular shape, and is connected to the front edge a of the bottom wall 4. A folded piece 10 is continuously provided on the front edge e of the front side wall 5, and a pair of first outer walls 11 is continuously provided on both left and right edges f, f. The folded piece 10 is folded at the front edge e in the assembled state and overlaps the outer surface of the front side wall 5. The pair of first outer walls 11, 11 are superimposed on outer surfaces of left and right side wall main bodies 7A, 8A described later in an assembled state.

  The front side wall 5 includes an annular front side wall peripheral portion 50 located on the same plane as each of the edges a, e, f, f while including front, rear, left and right edges e, a, f, f, and a front side wall peripheral edge. In a portion surrounded by the portion 50, a storage portion 52 having a plurality of partition ribs 51 for storing and supporting a predetermined article (not shown), and a pair of first reinforcements continuous on both left and right sides of the storage portion 52. It is configured to have walls 53, 53, and a pair of straight ridges 54 provided between the housing 52 and the edges a, e. Here, the predetermined article is a plate-shaped product such as a liquid crystal panel or an organic EL panel.

  In the unfolded state, the housing portion 52 is formed on a top portion of the base portion 55 provided so as to protrude from the front side wall peripheral edge portion 50 in the height direction (the front side in the direction perpendicular to the paper surface of FIG. 1). And a plurality of partition ribs 51. In the unfolded state, the plurality of partition ribs 51 are provided at equal intervals in the left-right direction, and extend linearly in the front-rear direction. The plurality of partition ribs 51 are formed only between the base of the base portion 55 and the top and only on the top side from the middle in the height direction. That is, the plurality of partition ribs 51 are not provided between the root of the base portion 55 and the top and closer to the root than the center in the height direction.

  Each of the pair of first reinforcing wall portions 53 has a first contact portion 530. The first contact portion 530 is formed of an inclined surface that is inclined inward in the left-right direction as it goes to the other one in the height direction (the near side in the direction perpendicular to the paper surface in FIG. 1) in the unfolded state. When the front side wall 5 and the left and right side wall bodies 7A, 8A are folded up, the first contact part 530 comes into contact with a second contact part 710 described later of the left and right side wall bodies 7A, 8A. It is formed where possible.

  The rear side wall 6 is formed in a rectangular shape, and is connected to the rear edge b of the bottom wall 4. A pair of first outer walls 11 is connected to both left and right edges f of the rear side wall 6. The pair of first outer walls 11, 11 are overlaid on the outer surfaces of the left and right side wall bodies 7A, 8A in an assembled state.

  The rear side wall 6 includes an annular rear side wall peripheral portion 60 located on the same plane as each of the edges b, g, h, h while including front, rear, left and right edges b, g, h, h, and a rear side wall peripheral edge. In a portion surrounded by the portion 60, a storage portion 52 having a plurality of partition ribs 51 for storing and supporting a predetermined article (not shown), and a pair of first reinforcements continuous on both left and right sides of the storage portion 52. It is configured to have walls 53, 53, and a pair of straight ridges 54 provided between the housing 52 and the edges b, g. In the present embodiment, the housing portion 52 on the rear side wall 6, the pair of first reinforcing wall portions 53 and 53, and the pair of straight ridge portions 54 are combined with the housing portion 52 on the front side wall 5 and the pair of first reinforcing portions. Since the wall portions 53, 53 and the pair of straight ridge portions 54 are formed in substantially the same shape or substantially the same configuration, the same reference numerals are given and detailed description is omitted.

  When the front and rear side walls 5 and 6 are folded and bent at the front and rear edges a and b of the bottom wall 4, and the front and rear side walls 5 and 6 are opposed to each other in the front and rear direction. The ribs 51 formed on the rear side wall 6 are provided to face each other. That is, in the assembled state, the grooves between the partition ribs 51 adjacent in the left-right direction are provided to face each other in the front-rear direction. A predetermined article is inserted and supported in the front and rear facing grooves.

  As shown in FIG. 4, the left and right side walls 7 and 8 are erected from a left side wall 7 erected from a left edge c of the bottom wall 4 and a right edge d of the bottom wall 4. And a right side wall 8.

  As shown in FIGS. 1 and 2, the left side wall 7 has a rectangular left side wall body 7 </ b> A connected to the left side edge c of the bottom wall 4 and the left side edge of the front side wall 5. f, and a second outer wall 12 connected to the left edge h of the rear side wall 6. At the time of assembly, the left side wall 7 has the first outer wall 11 overlapped on the outer surface of the left side wall main body 7A, and the second outer wall 12 on the side away from the left side wall main body 7A with the first outer wall 11 interposed therebetween. Can be stacked.

  The left side wall main body 7 </ b> A includes the edge c where the bottom wall 4 is continuously provided, and is in the same plane as the bottom wall peripheral edge 40, the first outer wall 11, and the second outer wall 12 of the bottom wall 4 in the unfolded state. An annular left side wall peripheral edge portion 70 extending in the direction of the left side wall peripheral portion 70 and an annular portion protrudingly provided on the other side in the height direction (the near side in the direction perpendicular to the paper surface in FIG. 1) of the portion surrounded by the left side wall peripheral edge portion 70. And the second reinforcing wall portion 71.

  In the assembled state, the pair of second abutting portions 710 are provided on the second reinforcing wall portion 71 at positions where the first abutting portions 530 of the first reinforcing wall portions 53 of the front and rear side walls 5 and 6 can abut. Is provided. In the assembled state, the pair of second contact portions 710 abut on the first contact portions 530 formed on each first reinforcing wall portion 53, so that the front, rear, left, and right side walls 5, 6, 7, 8 are formed. Maintain a state of being set up substantially at a right angle from the bottom wall 4. In the unfolded state, the pair of second contact portions 710 are inclined toward the center in the front-rear direction of the left side wall main body 7A toward the other in the height direction (the front side in the direction perpendicular to the paper surface in FIG. 1). It is composed of an inclined surface.

  As shown in FIGS. 1 and 2, the right side wall 8 has a rectangular right side wall body 8A connected to the right side edge d of the bottom wall 4 and a left side edge f of the front side wall 5. And a second outer wall 12 connected to the left edge h of the rear side wall 6. In the assembled state, the right side wall 8 has the first outer wall 11 overlapped on the outer surface of the right side wall body 8A, and the second outer wall 12 on the side away from the right side wall body 8A with the first outer wall 11 interposed therebetween. Are superimposed.

  The right side wall main body 8 </ b> A includes the edge d on which the bottom wall 4 is continuously provided, and is on the same plane as the bottom wall peripheral edge 40, the first outer wall 11, and the second outer wall 12 of the bottom wall 4 in the unfolded state. An annular right side wall peripheral portion 80 extending to the right side wall peripheral portion 80 and an annular portion protrudingly provided on the other side in the height direction (the front side in the direction perpendicular to the paper surface in FIG. 1) in the portion surrounded by the right side wall peripheral portion 80. And the second reinforcing wall portion 71. Since the second reinforcing wall portion 71 on the right side wall 8 is formed in substantially the same shape or substantially the same configuration as the second reinforcing wall portion 71 on the left side wall 7, detailed description is given with the same reference numerals. Is omitted.

  Each first outer wall 11 is formed with a U-shaped cut 11a. At the tip of each second outer wall 12, a locking piece 120 that can be locked to the cut 11a of each first outer wall 11 is formed.

  In the assembled state, the left and right side walls 7, 8 are superimposed on the respective outer surfaces of the left and right side wall main bodies 7A, 8A in the order of the first outer wall 11, the second outer wall 12, and the locking pieces 120 are formed on the cuts 11a. , The second outer wall 12 and the first outer wall 11 are sequentially superimposed on the outer surfaces of the left and right side wall bodies 7A and 8A, respectively.

  As shown in FIG. 4, the lid 3 is, in the assembled state, a top wall 9 that is disposed to face the bottom wall 4, and a fourth wall that is erected from the front edge i of the top wall 9 and overlaps the front side wall 5. It comprises one covering wall 13 and a pair of second covering walls 14, 14 erected from the left and right edges j of the top wall 9 and overlapped on the left and right side wall main bodies 7A, 8A. .

  As shown in FIGS. 1 and 2, the top wall 9 includes a first covering wall 13 and a pair of second covering wall bodies 14 </ b> A to be described later in an unfolded state while including an edge g where the rear side wall 6 is continuously provided. , 14A, an annular top wall peripheral portion 90 extending on the same plane as the top wall, a top wall first flat portion 91 provided in a portion surrounded by the top wall peripheral portion 90, and a pair of top wall second flat portions 92 , And a pair of top wall third flat portions 93. The pair of top wall second flat portions 92 and the pair of top wall third flat portions 93 have a predetermined width dimension in the front-rear direction and extend linearly in the left-right direction.

  In the unfolded state, the pair of top wall second flat portions 92 are provided at both ends in the front-rear direction, and the top wall first flat portion 91 is provided between the pair of top wall second flat portions 92. The pair of top wall third flat portions 93 are provided on the other surface in the height direction of the top wall first flat portion 91 (on the near side in the direction perpendicular to the paper surface in FIG. 1) with an interval in the front-rear direction.

  As shown in FIG. 1, the other of the top wall first plane section 91, the top wall second plane section 92, and the top wall third plane section 93 in the height direction of the top wall first plane section 91 (FIG. 1). In this case, a surface 91a (a front side in a direction perpendicular to the paper surface) is provided at a position farthest from the top wall peripheral edge 90 in the height direction. In addition, of the top wall first plane section 91, the top wall second plane section 92, and the top wall third plane section 93, the other in the height direction of the top wall third plane section 93 (in FIG. The front surface 93 a is provided at a position closest to the top wall peripheral edge 90 in the height direction. The top wall second plane portion 92 has a surface 92 a on the other side in the height direction (the near side in the direction perpendicular to the paper surface in FIG. 1), and the other surface 91 a in the height direction of the top wall first flat portion 91 and the top wall. The third flat portion 93 is provided so as to be located between the third flat portion 93 and the other surface 93 a in the height direction.

  Each of the pair of second covering walls 14 includes a second covering wall main body 14A and a tongue piece 15 connected to both left and right edges k of the first covering wall 13.

  A U-shaped cut 14a is formed in the second cover wall main body 14A. Each tongue piece 15 is formed with a semicircular cut 15a. Each tongue piece 15 is superimposed on the outer surface of the second covering wall main body 14A by being folded at substantially right angles with the left and right edges k, k of the first covering wall 13 as folds. By locking the tip of the tongue piece 15 while locking the semicircular cut 15a in the U-shaped notch 14a, the state in which each tongue piece 15 overlaps with each second covering wall main body 14A is achieved. It is being maintained.

  The procedure for assembling the container structure 1 will be described with reference to FIGS.

  First, as shown in FIGS. 1 to 3, the back surface (the inner surface of the container structure 1) of the developing body 1 </ b> A is located above, and the surface (the outer surface of the container structure 1) of the developing body 1 </ b> A is located below. Using the edges a, b, c, and d of the wall 4 as folds, the front and rear side walls 5, 6 and the left and right side wall main bodies 7A, 8A are folded. A first contact portion 530 of each first reinforcing wall portion 53, 53 in the front side wall 5, a second contact portion 710 of each second reinforcing wall portion 71, 71 in the left and right side wall main bodies 7A, 8A, Abuts. At substantially the same time, the front and rear side walls 5, 6 are erected from the bottom wall 4, and the left and right side wall main bodies 7A, 8A are erected from the bottom wall 4. As a result, the first contact portion 530 and the second contact portion 710 in the contact state are erected at the four corners of the bottom wall 4, and the front and rear side walls 5, 6 and the left and right side wall main bodies 7A, 8A are connected. , The state of being erected at a substantially right angle from the bottom wall 4 is maintained.

  Thereafter, the front side wall 5 is folded using the front edge e as a fold, and the folded piece 10 is overlapped on the outer surface of the front side wall 5. Further, the left and right edges f of the front side wall 5 are folded, and the first outer walls 11 are overlapped on the outer surfaces of the left and right side wall main bodies 7A and 8A. Then, the locking pieces 120 of each second outer wall 12 lock the cuts 11 a of each first outer wall 11. Thereby, the state where each second outer wall 12 and each first outer wall 11 are sequentially overlapped with each outer surface of the left and right side wall main bodies 7A and 8A is maintained.

  Thus, the left side wall 7 having the left side wall main body 7A, the first outer wall 11, and the second outer wall 12 is formed, and the right side having the right side wall main body 8A, the first outer wall 11, and the second outer wall 12 is formed. Side wall 8 is formed. Then, as shown in FIG. 4, the box body 2 is formed in which the front, rear, left and right side walls 5, 6, 7, 8 are erected from the bottom wall 4.

  Next, the first covering wall 13 and each second covering wall main body 14A are folded up with each edge i, j, j of the top wall 9 as a fold. Next, each of the left and right edges k, k of the first covering wall 13 is folded and the tongue pieces 15 are superimposed on each outer surface of each second covering wall main body 14A. Then, the front end of the tongue piece 15 is locked while the semicircular cut 15a is locked to the U-shaped cut 14a. The state where each tongue piece 15 overlaps the outer surface of each second covering wall main body 14A is maintained. In this manner, as shown in FIGS. 4 and 5, the lid 4 having the first covering wall 13 and the pair of second covering walls 14 erected from the top wall 9 is formed, and the container structure 1 is completed. In the container structure 1, the accommodating portions 52 provided on the inner surfaces of the front and rear side walls 5 and 6 are provided to face each other in the front and rear direction. The container structure 1 is configured such that a predetermined article is inserted from above and supported in the grooves facing the front and rear of each of the storage sections 52.

  According to the above-described embodiment, the bottom wall 4 is provided with the concave portion 42 including the draft portion 41 (gradient) having a predetermined depth. According to this, since the bottom wall 4 is provided with the concave portion 42 including the draft portion 41 having a predetermined depth, it is possible to obtain rigidity capable of maintaining the assembled container shape.

  A plurality of bottom wall protrusions 44 (protrusions) standing upright toward the top wall 9 at the time of assembly extend parallel to the bottom wall flat portion 43 (bottom of the recess) of the recess 42. Is provided. According to this, the rigidity can be further increased.

  According to the above-described embodiment, the edges a, b, c, and d of the bottom wall 4 and the edge g located at the boundary between the rear side wall 6 (one side wall) and the top wall 9 are creased. The container structure 1 is formed by folding up one side wall 5, 6, 7, 8 and a top wall 9. According to this, since the concave portion 42 including the draft portion 41 (gradient) having a predetermined depth is provided in the bottom wall 4, it is possible to obtain rigidity capable of maintaining the shape of the container in the assembled state. Can be.

  Note that the present invention is not limited to the above-described embodiment, but includes other configurations and the like that can achieve the object of the present invention, and the following modified examples are also included in the present invention.

  In the above-described embodiment, the developing body 1A is formed by hot press molding or vacuum molding of a single flat plate made of a thermoplastic resin, but the present invention is not limited to this. The developing body 1A may be formed by injection molding.

  In the above-described embodiment, three bottom wall projections 44 (projections) are provided, and the three bottom wall projections 44 are provided in parallel with each other at equal intervals in the front-rear direction. However, the present invention is not limited to this. Two or four or more protruding portions may be provided. Alternatively, the bottom wall protruding portion may be erected from the bottom wall flat portion 43 in an H shape in plan view, may be erected in an E shape in plan view, and may be an S shape in plan view. It may be erected in a shape, may be erected in a plan view in an X shape, or may be erected in a plan view in a Z shape. According to this, substantially the same effects as in the above-described embodiment can be obtained.

  In addition, the best configuration and method for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this. That is, although the present invention has been particularly shown and described with particular reference to particular embodiments, the technical spirit of the present invention and the described embodiments without departing from the scope of the objects, Those skilled in the art can make various modifications in shape, material, quantity, and other detailed configurations. Therefore, the description of the limited shapes, materials, and the like disclosed above is illustratively provided to facilitate understanding of the present invention, and does not limit the present invention. The description by the name of the member excluding some or all of the limitations such as is included in the present invention.

Reference Signs List 1 container structure 1A deployment body 4 bottom wall 5 front side wall (four side walls)
6. Back side wall (four side walls)
7 Left side wall (4 side walls)
8 Right side wall (4 side walls)
9 top wall 41 slope part (gradient)
42 recess 43 flat bottom wall (bottom of recess)
44 Bottom wall projection (projection)
a Front edge (four edges)
b Back edge (four edges)
c Left edge (four edges)
d Right edge (four edges)
g Edge located at the boundary between one side wall and top wall

Claims (3)

A bottom wall having a rectangular shape, four side walls continuously provided at four edges of the bottom wall, and a top wall continuously provided via one of the four side walls,
A deployment body in which the bottom wall, the four side walls, and the top wall are located on the same plane, and become a container during assembly,
The unfolded body, wherein the bottom wall is provided with a concave portion including a draft with a predetermined depth.   The unfolded body according to claim 1, wherein a plurality of protruding portions that stand up toward the top wall at the time of assembling extend in parallel on a bottom surface of the concave portion.   3. The unfolding body according to claim 1, wherein each edge of the bottom wall and an edge located at a boundary between the one side wall and the top wall are creases, and the four side walls and the top wall are A container structure formed by being bent from the bottom wall.

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