JP2002332044A - Assembling volume variable box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to change volume or shape of a box. SOLUTION: A volume variable box 10 of rectangular parallelepiped shape having an open upper side is provided with four corner pieces 11a to 11d composed of three same sized square sheet members, each surface is perpendicular to each other, two sides of each are connected to two sides of each other at least two second corner pieces 21a and 21b composed of two square sheet members of the same shape as above-mentioned square sheet members, each surface is perpendicular to each other, one side of each being connected to one side of each other, and a plurality of connection members 41a to 41h for mutually connect the adjacent first corner pieces and second corner pieces to each others when the first corner pieces 11a to 11d themselves or the first corner pieces 11a to 11d and the second corner pieces 21a and 21b are made into a rectangular parallelepiped shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for storing daily necessities and the like, and more particularly to a container capable of changing its internal capacity.

[0002]

2. Description of the Related Art Conventionally, containers for storing daily necessities have been provided in various sizes and shapes such as baskets and baskets. However, those inexpensively provided have a constant shape and capacity. Most are fixed capacity containers.

On the other hand, as a variable capacity type container, FIG.
9 is proposed in Japanese Patent Application Laid-Open No. H10-147336. This return box 1 has two end boxes 2 and 3 whose upper ends are open laterally at one end in the longitudinal direction, and an intermediate box 4 whose upper ends are open laterally at both ends in the longitudinal direction. The intermediate box 4 is slidably fitted inside the end boxes 2 and 3 in the longitudinal direction, so that the length and the internal capacity of the return box 1 are variable. Holes 5a, 5b, 5c, and 5d are formed in the side plate 4a of the intermediate box 4, and the end boxes 2, 3
Holes 6 and 7 are also drilled in the side plates 2a and 3a of
3 and the intermediate box 4 are slid with each other, and at a position where the holes 6 and 7 overlap with any of the holes 5a to 5d, the connecting tool 8 is fitted into the holes to thereby reduce the length of the returnable box 1. After adjusting the length to the required length, it is fixed immovable.

[0004]

In the housing situation in Japan, how to effectively use the limited space to easily store and store a large number of things is a major concern and a challenge. . Especially recently,
Items that can be subdivided and arranged by using a container with an upper opening in order to organize and store daily necessities under a sink, on a desk, in a drawer, on a shelf, etc. However, various storage techniques have been proposed, such as a drawer-type one that can be put in and out, and a space that has been conventionally regarded as a dead space is changed into a storage space that can be easily put in and out.

[0005] However, since the circumstances such as what is stored in the container, the place where the container is placed, and the space are different in each household, even if a ready-made container is used, it does not meet the needs of each household. In many cases, they cannot be fully organized, and drawers and shelf depths and widths cannot be used to the maximum without waste.

Although the length of the returnable box 1 can be adjusted stepwise to make the internal capacity variable, it is not possible to adjust both the depth and width, and it is not always possible to adapt to the wishes of the user. Can not do it. Furthermore, since the structure is complicated and the manufacturing cost is high, there is a problem that it is expensive to provide a daily necessity storage box. In particular, once the daily size is stored after adjusting and fixing the size of the container, it is not very practical to resize the container and use it in a different place.In terms of cost performance, it is possible to change the size. Even so, there has been a demand for a low-cost container with a small price difference from a fixed-size container.

The present invention has been made in view of the above problems, and has as its object to provide an inexpensive variable-capacity container in which the internal capacity and shape can be variously changed as required by a user.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a variable capacity box having a rectangular parallelepiped shape having an open upper surface, and having a variable internal capacity. Four first corner pieces, each of which is formed of a square sheet member having a size, each surface of which is orthogonal to each other and whose two sides are connected to each other, and two pieces of the same shape as the square sheet member A sheet member, at least two second corner pieces each having a shape orthogonal to each other and having one side connected to each other, and each of the first corner pieces, or the second corner piece A variable capacity box comprising a plurality of connecting members for connecting each of the first corner piece and the second corner piece adjacent to each other when each of the pieces is added to form the rectangular parallelepiped shape. ing

[0009] With the above configuration, the container user can easily create a container having a shape and size as required by connecting a required number of each corner piece using the above-mentioned connecting member. Can be. In particular, by increasing or decreasing the number of the second corner pieces, the shape and internal capacity of the container can be easily changed.

That is, the first corner piece constitutes the bottom four corners of the rectangular parallelepiped container, and the second corner piece can be used to form each side other than the four corners. A required number of second corner pieces are interposed between the first corner piece and the first corner piece, and each corner piece is connected by a connecting member, so that the length of the side on which the second corner piece is interposed is adjusted in one direction. Therefore, the internal capacity can be changed.

[0011] Further, by reducing the size of the square sheet member constituting each surface of each corner piece, the size of the container can be finely changed. It becomes possible.

The above-mentioned connecting member is connected across the boundary sides of the adjacent corner pieces. The connecting part is formed on the corner piece and the connecting part is formed on the connecting material. Are connected or engaged with each other to connect adjacent corner pieces. In particular, it is preferable that the connecting portion and the connected portion are formed of a concave portion and a convex portion, and have a structure in which they are fitted to each other.

[0013] The present invention also provides the above-described rectangular parallelepiped by adding at least one flat piece made of a sheet member having the same shape as the square sheet member, and adding the flat pieces to the first corner piece and the second corner piece. There is also proposed a variable capacity box further provided with a plurality of the connecting members for connecting each of the first corner piece, the second corner piece, and the flat piece which are adjacent to each other when formed.

In this case, the container is not limited to one direction,
The size can be changed in three directions of depth and height. That is,
By connecting the first corner pieces forming the bottom four corners and the required number of second corner pieces forming each side of the container to each other, first, the width, depth and height of the container are framed to the required size. By connecting the flat pieces so as to fill the space between the frames, a surface can be formed, and containers having various shapes can be produced.

The connecting member includes a second square sheet member having a size equal to or smaller than the square sheet member and a diagonal line of the second square sheet member, wherein one side of the square sheet member has a length of M In this case, there are four protrusions formed at the vertices of a square having a length of M / 2 as one side, and one of the square sheet members constituting the first corner piece has a diagonal line on its diagonal line. In addition, one connection hole that can be fitted to one of the protrusions is provided at a position farthest from the other two square sheet members among the apex positions of the square having the length of M / 2 as one side. Are formed, and the other two square sheet members are separated from the other square sheet members among the apexes of the square on the diagonal line and having the length of M / 2 as one side. In position, two adjacent matable 2 Is formed on each of the sheet members forming the second corner piece, at the apex position of a square on the diagonal line and having a length of M / 2 as one side, the protrusion portion is provided. And four connecting holes that can fit into each of the flat pieces are formed, and the sheet member that constitutes the flat piece has diagonal lines each having a vertex position of a square having a length of M / 2 as a side. Among them, it is preferable that four connection holes that can fit into each of the protrusions are formed.

As described above, four projections are provided on one connecting member, and these connecting members are attached across the connecting sides of the adjacent first corner pieces or the like to be connected.
Not only the movement of separating the connection sides such as the corner sides, but also the movement of shifting up and down along the connection sides can be prevented. It can be stably bonded without any deviation or separation. Further, by arranging the protruding portions at the apexes of a square whose length is one half of the length M, each surface is constituted by square sheet members of the same size having the length M as one side. Any of the first corner piece, the second corner piece, and the flat piece described above can be connected to each other, and one type of connecting material can be shared for connecting any members. More specifically, the protrusions of the connection member and the connection holes formed in each of the corner pieces and the flat pieces are each provided with a vertex of a square having a length equal to half the length M of one side of the square sheet member. Because it is formed at the position, two adjacent corner pieces, corner pieces and flat pieces, or even when two surfaces of two flat pieces are connected, four adjacent corner pieces, corner pieces and flat pieces are adjacent to each other. In the case of connecting the four faces selected from the four pieces or the four surfaces of the four flat pieces, the connection can be performed by using only one of the above-described connecting materials, and the connection at all locations is performed by one type of the connecting material. It becomes possible. Therefore, the number of component types can be reduced by sharing the connecting material, and the manufacturing cost can be reduced. In addition, the assembling work is simple and easy for the purchaser, which is favorable.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 13 show a container 10 having an upper opening and a container 10 after capacity expansion according to a first embodiment of the present invention.
0, 101, which are the first corner piece 1
1 (11a-11d), the second corner piece 21 (21a-
21h), the flat pieces 31 (31a to 31e) and the connecting members 41 (41a to 411) are connected in the horizontal connecting direction and / or
Or, they are assembled in the vertical connection direction. In addition,
Each of these members has both flexibility and rigidity,
For example, it is preferable to integrally mold with a synthetic resin.

As shown in FIG. 2 (illustration of the first corner piece 11a), the first corner piece 11 is made up of three square sheet members each having a length M of one side. The two face plates 12a are side plates 13a and 14a, and their surfaces are orthogonal to each other, and are integrally formed in a shape in which one side of each of the plates 12a, 13a and 14a is connected to each other. One connecting hole 51a is formed in the bottom plate 12, and the position of the connecting hole 51 is on a diagonal line of the bottom plate 12a and the length of M / 2 is defined as one side as shown in FIG. Among the vertex positions of the squares described above, are the vertex positions farthest from the two side plates 13a and 14a. As shown in FIG. 4 (an example of the side plate 13a), each of the side plates 13a and 14a has a total of four connection holes 52a, 53a, 54a and 5a.
5a, and the positions of these connection holes are determined by the side plate 13
On each diagonal line of a and 14a, two vertices are provided at vertices far from the other side plate, among the vertices of a square having a length of M / 2 as one side. As shown in FIG. 5 (shown as an example of the second corner piece 21a), the second corner piece 21 is formed by intersecting flat plates 22a and 23a made of two square sheet members each having a side length M. At the same time, the respective sides are integrally formed so as to be connected to each other.

The flat plates 22a and 23a are provided with a total of eight connecting holes 61a to 68a, one near each of the four corners. It is formed at the apex position of a square having a length of / 2 as one side. As shown in FIG. 6 (illustration of the flat piece 31a), the flat piece 31 is formed of a flat plate 32a formed of a square sheet member having a side length M, and the flat plate 32a is also on a diagonal line. And a total of four connection holes 71 are located at the apexes of a square whose length is M / 2.
a to 74a are drilled.

As shown in FIGS. 7A and 7B, the connecting member 41 is made of a second square sheet member having a side length N of M or less. Substrate part 4
2a and four projections 43a to 46a projecting from the surface of the substrate 42a. The projections 43a to 46a are
On the diagonal line of the substrate portion 42a, the protrusion is provided at each vertex position of a square whose one side has a length of M / 2. The projections 43 to 46 are connected to the connection holes 51 to 55, 61 to 6 respectively.
8, 71 to 74 (hereinafter abbreviated as "51 etc.") when fitted to each of the large-diameter portions L engaged with the periphery of the connection hole 51 or the like.
And the small-diameter portion S accommodated in the connection hole 51 or the like, and the diameter of the large-diameter portion L is larger than the inner diameter of the connection hole 51 or the like and is a dimension that can be forced into the connection hole 51 or the like, The diameter of the small diameter portion S is smaller than the inner diameter of the connection hole 51 and the like, and the clearance formed between the outer peripheral surface of the small diameter portion S and the inner peripheral surface of the connection hole 51 and the like at the time of insertion is made as small as possible. Dimensions.

Next, the four first corner pieces 11a to 11a
11d and five connecting members 41a to 41e, a small-capacity container 1
The operation for assembling the 0 will be described. First, as shown in FIG. 1A, four first corner pieces 11a to 11d are
The two sides of each of the bottom plates 12a to 12d are connected to each other, and the respective side plates 13a to 13d, 14a
~ 14d are arranged so that one side is connected to each other,
A container bottom portion A and a container side portion B are temporarily formed. Next, FIG.
As shown in FIG.
The projections 43a to 46a are opposed to each other, and the projections 43a to 46a are fitted into the connection holes 51a to 51d of the four bottom plates 12a to 12d.
By attaching one connecting member 41a from the outside over a to 12d, the container bottom portion A is connected and formed. Next, as shown in FIG. 9, the first corner pieces 11 a and 11 b adjacent to each other are straddled over a connecting portion between one side plate 14 a and the other side plate 13 b for a total of four sides of each container side portion B. The protrusions 43b to 46b of the connection member 41b are fitted into the connection holes 54a, 55a, 52b, and 53b from the outer surface side,
Other adjacent first corner pieces 11b and 11c, 11c
And 11d, and 11d and 11a are similarly connected to each other using connecting members 41c to 41e. The connecting member 41 may be fitted from the inner surface side instead of the outer surface side. Moreover, the container side surface part B may be connected and formed first, and then the container bottom part A may be connected and formed.

With the above configuration, the adjacent second
Since the one corner pieces 11a to 11d are connected to each other by one connecting material 41 having connecting projections 43 to 46 at four places, each connected place does not shift or move up and down or left and right, Rather, the substrate portion 42 of the connecting member 41
It can be reinforced and stably combined.

Next, an operation of adding only the second corner piece 21 to the small-capacity container 10 having the above-described configuration and assembling it into a medium-capacity container 100 having a large capacity will be described with reference to FIGS. First, the container 10 is disassembled into four first corner pieces 11a to 11d and five connecting members 41a to 41e. There, two second corner pieces 21a, 21b and three connecting members 41f, 41g, 41h are added.

Next, the second corner piece 21a is
Between the corner pieces 11b and 11c, the other second corner piece 21b is arranged between the first corner pieces 11a and 11d, and the flat plate 23 is connected to the side plate 13 or 13 of the adjacent first corner piece, The flat plate 22 is connected to the bottom plate 12 to temporarily form the container bottom portion A and the container side portion B.

Next, there are two connection points on the container bottom surface A where four square sheet members are connected by two sides, and one connection member 41a and 41b is used for each connection point. The connecting members are fitted into four adjacent square sheet members one by one and joined. That is, four adjacent connection holes 51a, 51b, 64a of the bottom plate 12a, the bottom plate 12b, the flat plate 22a, and the flat plate 22b are adjacent to each other.
The connecting member 41a is fitted into the 63b, and similarly, the adjacent flat plates 22b, 22a, the bottom plate 12c, and the bottom plate 12d are connected to each other by the connecting member 41b to form the container bottom portion A. In addition, there are a total of six connection points where two adjacent square sheet members are connected to each other on one side of the container side part B, and each of the connection points is connected using one of the connection members 41c to 41h. To go. That is, the side plate 14a and the side plate 13b, the side plate 14b and the flat plate 23a, the flat plate 23a and the side plate 13c, and the side plate 1
4c and side plate 13d, side plate 14d and flat plate 23b, flat plate 23
b and the side plate 13a, respectively, and all the corner pieces 11a to 11d, 21a, 21b are connected to each other to complete the container 100.

As described above, by adding two second corner pieces, either the width or the depth becomes longer, so that in this embodiment, the internal capacity of the container 100 is 1.5 times that of the container 10. Can be doubled. Also,
When the container is used in a shelf or drawer, the width and depth of the shelf and the like can be effectively used. On the other hand, the second
By removing the corner pieces, the width or the depth can be shortened, and accordingly, the internal capacity is reduced, and the size can be changed to a size suitable for small articles and small pieces.

If a second corner piece having a multiple of 2 and a necessary connecting material are further added and connected in the same manner, a container having a longer width or depth can be obtained.

Next, an operation of assembling the medium-capacity container 100 having the above-described structure into a large-capacity container 101 having a larger capacity will be described with reference to FIGS. First, the container 100 is disassembled into members, and a new member is added thereto, so that a total of four first corner pieces 11a to 11d, eight second corner pieces 21a to 21h, and five flat pieces 31a are provided.
To 31e and twelve connecting members 41a to 41l are prepared.

Next, a container bottom portion A is formed. First, the four first corner pieces 11a to 11d are spaced apart from each other at positions corresponding to the four corners of the container bottom portion A, and each first corner piece 1
The second corner pieces 21a to 21d are interposed one by one between 1a to 11d, and one side of the bottom plate 12 of the adjacent first corner piece 11 and one side of the flat plate 22 of the second corner piece are connected to the adjacent first corner piece. Eleven side plates 13 or 14 and one side of the flat plate 23 of the second corner piece are connected to each other. Then 4
Container bottom A surrounded on all sides by two flat plates 22a to 22d
One flat plate 32a of a flat piece 31a is fitted into the center of the four flat plates 31a to 12d and four flat plates 22a.
The container bottom portion A is temporarily formed with the base plate 22a and the single flat plate 32a. Finally, the nine square sheet members forming the container bottom portion A are connected four by four by four connecting members 41a to 41d. That is, there are four places where four square sheet members are connected by two sides on the container bottom part A, and each place is connected by using the connecting material 41 one by one. Thereby, as shown in FIG. 13, the bottom plate 12a,
The four protruding portions 43a to 46a of the connecting member 41a are fitted into the four connecting holes 51a, 64a, 71a, and 63d of the flat plates 22a, 32a, and 22d, respectively, which are adjacent to each other. 22a, the bottom plate 12b, the flat plate 22b, and the flat plate 32a are connected to each other by the connecting member 41b.
2a, the flat plate 22b, the bottom plate 12c, and the flat plate 22c are connected by the connecting member 41c, and the adjacent flat plate 22d, the flat plate 32a, and the flat plate 22 are connected.
c, The bottom plate 12d is connected to each other by the connecting member 41d to complete the container bottom portion A.

Next, a container side portion B is formed. The lower part B1 of the container side part B is already formed temporarily when the container bottom part A is formed. That is, the first corner piece 11
A lower stage B1 is formed between the side plates 13a to 13d and 14a to 14d of the second to fourth corner plates 23a to 23d. Next, the upper part B2 of the container side part B is formed while being stacked on the lower part B1. First, the first corner pieces 1 at the four corners
The second corner pieces 21e to 21h are laid sideways on 1a to 1d, and the side plates 13a to 13d of the first corner piece 11 and the flat plates 22e to 22h of the second corner pieces 21e to h are connected to each other. Side plate 1 of the first corner piece 11
The sides 4a to 4d and the flat plates 23e to 23h of the second corner piece 21 are also connected to each other in the vertical direction and connected to each other. Next, the flat piece 3 is placed between each of the second corner pieces 21e to 21h arranged at the four corners.
1b-e are interposed continuously in the horizontal direction, and in the vertical direction, the flat plates 23a-d of the lower tier B1 and the flat plates 32b-
e is continued. Finally, the container side portions B are connected and formed. That is, each surface of the container side portion B is formed of six square sheet members, and there are two places where four adjacent square sheet members are connected by two sides. Each part is connected using one of the connecting members 41e to 41e to complete the container side part B. This is the same as the connection operation of the container bottom portion A.

By the above-described assembly, the container 101 becomes the container 1
Compared to 00, the bottom area can be 1.5 times and the height can be doubled,
The volume can be tripled. In addition, the connecting material 41
Can be used for all connection points regardless of the bottom and side,
The manufacturing cost can be reduced, and the assembling operation can be made simple and easy.

If a required number of second corner pieces, flat pieces and connecting members are further added and connected in the same manner, a container having a larger capacity can be obtained.

FIGS. 14A, 14B and 14C show the second embodiment of the present invention.
In the embodiment, the bottom plate 12 of the first corner piece 110 is shown.
By providing four connection holes in each of the side plates 130 and 140, it is possible to assemble a container having a plurality of storage chambers, such as a two-chamber container 102 shown in FIGS. 14B and 14C. A wide variety of containers can be made by combining the first corner pieces 11, 110, the second corner pieces 21, and the flat pieces 31.

FIGS. 15A, 15B and 15C show a third embodiment of the present invention.
By using the auxiliary connecting member 81 shown in FIG. 15 (A) and the bendable corner connecting member 82 shown in FIG. 15 (B), each of the constituent members can be changed like the two-chamber container 103 shown in FIG. 15 (C). The connection can be made more reliable. The auxiliary connecting member 81 has a half shape of the connecting member 41, and can be used when connecting two adjacent square sheet members. Further, the corner connecting member 82 is formed so that the connecting member 41 can be bent at a right angle at a vertical center line with the protrusion inside, and when connecting two sides at a corner portion to connect two adjacent members. Used for

The present invention is not limited to the above embodiment, and the capacity and shape of the container can be variously changed depending on the combination.

The shape of the connecting member 41 is not limited to the above. For example, the connecting member 41 shown in FIG.
As shown in FIG. 10, instead of the connecting protrusion 43, the L-shaped protrusion 4
In this case, the connection holes 51 of the first corner piece 11, the second corner piece 12, and the flat piece 13 may be formed as plus-shaped connection holes 510 and the like.
The U-shaped protrusion 430 is inserted and locked in each of the connection holes 510 and the like as shown in FIG. By making the connection holes 510 and the like have a plus shape, the L-shaped projection 430 of the connection member 410 can be connected to the connection holes 510 and the like even if the directions of the corner pieces and the flat pieces to be connected are mixed vertically and horizontally. Can be locked.

In addition to the above, the shape of the substrate portion 42 of the connecting member 41 may be a perforated shape shown in FIG. 17 or a cross shape shown in FIG.

In the above-described embodiment, the ends serving as the abutting surfaces of the corner pieces and the flat pieces are formed in a plane, but these ends may be made uneven so that they can engage with each other. If this is the case, the engagement state when these are connected is further stabilized.

[0039]

As is apparent from the above description, the container is divided into the first corner piece, the second corner piece, and the flat piece, and each surface of the piece is a square sheet member of the same size. And by connecting the member pieces using a connecting member, the container can be assembled by adjusting the depth, width, and height stepwise, and the user of the container can use the member pieces. Can be freely changed to a desired shape and internal capacity by increasing or decreasing. In addition, the connecting member is provided with four protrusions, and the protrusions are arranged at the apexes of the same size square, and each member is also provided with a concave portion or a hole at a position where it fits with the protrusion of the connecting material. Thus, two member pieces arranged in parallel or four square sheet members arranged adjacent to each other on a plane can be connected by one connecting member, and the types of connecting members are unified and the number of component types Therefore, the product can be provided at low cost, and the assembling work of the container can be made simple and easy.

[Brief description of the drawings]

FIG. 1 shows a small-capacity container according to a first embodiment, and (A)
1 is an overall perspective view, and FIG. 1B is a plan view.

FIG. 2 is a perspective view of a first corner piece.

FIG. 3 is a plan view of a bottom plate of a first corner piece shown in FIG. 2;

FIG. 4 is a plan view of a side plate of a first corner piece shown in FIG. 2;

FIG. 5 is a perspective view showing a second corner piece.

FIG. 6 is a perspective view showing a flat piece.

FIG. 7 shows a connecting member, and (A) is an overall perspective view;
(B) is a side view.

FIG. 8 is an exploded perspective view of a bottom surface portion of the small-capacity container shown in FIG.

FIG. 9 is a partially exploded perspective view of a side portion of the small-capacity container shown in FIG.

FIG. 10 is a partially exploded perspective view of the medium capacity container according to the first embodiment.

11 is a bottom view of the container shown in FIG.

FIG. 12 is a partially exploded perspective view of the large-capacity container according to the first embodiment.

FIG. 13 is a bottom view of the container shown in FIG.

FIGS. 14A and 14B show a second embodiment, in which FIG. 14A is a perspective view showing a first corner piece, and FIGS.
It is a schematic perspective view which shows the formation procedure of the container using one corner piece.

15A and 15B show a third embodiment, wherein FIG. 15A is a perspective view showing an auxiliary connecting member, FIG. 15B is a perspective view showing a corner connecting member, and FIG. 15C is an auxiliary connecting member and a corner connecting member. It is a schematic perspective view which shows an example of the container formed using the.

FIG. 16 is a perspective view showing a modification of the connecting member.

FIG. 17 is a perspective view showing another modification of the connecting member.

FIG. 18 is a perspective view showing another modification of the connecting member.

FIG. 19 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Small capacity container 11, 110 ... 1st corner piece 12 ... Bottom plate 21 ... 2nd corner piece 31 ... Flat piece 41, 410 ... Connecting material 43-46, 430 ... Projection part 51-55, 61-68, 71 -74, 510 ... connecting hole 81 ... auxiliary connecting material 82 ... corner connecting material 100 ... medium capacity container 101 ... large capacity container 102, 103 ... two-chamber container The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (3)

[Claims] 1. A variable capacity box having a rectangular parallelepiped shape with an open upper surface and variable internal capacity, comprising three square sheet members of the same size, each surface being orthogonal to each other. And four first corner pieces each having a shape in which each two sides are connected to each other, and two sheet members having the same shape as the square sheet member, each surface being orthogonal and each one side being At least two second corner pieces having a shape connecting each other, and each of the first corner pieces, or
A plurality of connecting members for connecting each of the first and second corner pieces adjacent to each other when each of the corner pieces is added to form the rectangular parallelepiped shape; . 2. The rectangular parallelepiped shape by adding at least one flat piece made of a sheet member having the same shape as the square sheet member, and adding the flat pieces to the first corner piece and the second corner piece. 2. The assembled variable capacity box according to claim 1, further comprising: a plurality of connecting members for connecting each of the first corner piece, the second corner piece, and the flat piece that are adjacent to each other. 3. The square sheet member having a size equal to or less than the size of the square sheet member, and a length of one side of the square sheet member on a diagonal line of the second square sheet member. Is M, and four protrusions are formed at the apexes of a square whose length is M / 2. One of the square sheet members constituting the first corner piece has a diagonal line. One of the vertices of the square having the length of M / 2 as one side, and which is farthest from the other two square sheet members, can be fitted to one of the protrusions. A connection hole is formed, and the other two square sheet members are mutually diagonally located at the apex positions of the square having the length of M / 2 as one side. At a remote position, two adjacent mating portions of the protrusion can be fitted. Pieces and connecting hole is formed of, in each of the sheet members constituting the second corner piece,
On the diagonal line, at the apex position of a square having a length of M / 2 as one side, four connection holes that can fit into each of the protrusions are formed, and constitute the flat piece. The sheet member has four connection holes formed on the diagonal of the square apex having a length of M / 2 as one side and capable of fitting to each of the protrusions. The assembled variable capacity box according to claim 2.