JP5954167B2 - Variable capacity box - Google Patents

Description

  The present invention relates to a variable capacity box capable of changing the internal capacity. Specifically, the variable capacity box of the present invention not only provides a fold line at the boundary position between the side surface and the top surface, but also provides another fold line at a position on the side surface that is a predetermined distance away from the fold line, The height of the side surface can be changed in multiple stages, and as a result, the content can be changed.

Conventionally, corrugated cardboard cases for storing various products have been used in factories, processing plants, product centers,
Widely used in distribution centers. A normal corrugated cardboard case has a substantially rectangular shape when the top plate and the bottom plate are connected to the top and bottom of each side plate constituting the side surface in the unfolded state, and the side plate, the top plate, and the bottom plate are assembled according to the folding line. For example, each top plate and each bottom plate are separated by slits to form four pieces, front, back, left, and right. When assembling the cardboard case, each side plate is widened, and the top and bottom top plates and bottom plate are formed. Are stacked on top of each other, but are put together and pasted with gummed tape to form a storage box.

  By the way, conventionally, when packing a small amount of product in a cardboard case or the like, for example, a small packing material corresponding to the packing amount of the product is prepared, or a foamed polystyrene or the like is provided in a gap generated between the product and the packing material. Means have been taken, such as filling a gap by filling a cushioning material, or cutting the packing material with a knife or the like to reduce the size of the packing material in accordance with the size of the packing of the product.

  However, if the packing materials of various sizes are prepared according to the size of the goods to be packed as in the conventional means, not only the mass production of the packing materials becomes difficult, but also the packing materials. Because many storage locations are required, there is a problem that manufacturing costs and storage costs increase. In addition, when foamed foam is used to fill the gap between the product and the packaging material as in the conventional means, it is necessary to dispose of the foamed foam after using the packaging material, and wasteful materials Increasingly causes environmental pollution problems. Furthermore, as in the past, the means to cut the packing material to an appropriate size by cutting it with a knife or the like in accordance with the packing amount of the product takes time and effort to reduce the packing material, resulting in poor work efficiency, There is also a risk of damaging the product with a knife.

  Therefore, at present, there is a demand for a variable capacity box that can easily change the internal capacity in accordance with the amount of product packaging.

Therefore, as a result of intensive studies on the means for solving the problems of the conventional invention, the inventor of the present invention has not only provided a broken line at the boundary position between the side surface and the top surface, but also on the side surface separated from the folded line by a predetermined distance. It was found that the height of the side surface can be changed in multiple stages by providing another fold line at the position, and as a result, the content can be changed. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
More specifically, the present invention has the following configuration.

The present invention relates to a variable capacity box.
The variable capacity box of the present invention includes a side surface 10, a top surface 20, and a bottom surface 30.
The side surface 10 is formed by connecting a pair of short side plates 11 and 12 facing each other and a pair of long side plates 13 and 14 facing each other in the lateral direction.
The top surface 20 is connected to the pair of short side plates 11 and 12 and the pair of long side plates 13 and 14 in the vertical direction via first folding lines 11a, 12a, 13a and 14a extending in the horizontal direction. The pair of short top plates 21 and 22 and the pair of long top plates 23 and 24 are provided.
The bottom surface 30 is connected to the side surface 10 in the vertical direction opposite to the top surface 20.
Here, the side surface 10 further includes second fold lines 11b, 12b, 13b, and 14b and cuttable lines 15a, 15b, and 15c extending in the vertical direction.
That is, the second fold lines 11b to 14b are formed at positions spaced apart from the first fold lines 11a to 14a by a predetermined distance on the pair of short side plates 11 and 12 and the pair of long side plates 13 and 14, respectively.
Further, the cuttable lines 15a to 15c extending in the vertical direction are between one fold line 11a to 14a and the second fold line 11b to 14b, and are a pair of short side plates 11, 12 and a pair of long side plates 13, 14 is formed on each boundary line.
Thereby, the capacity variable box of the present invention includes a pair of short top plates 21, 22 and a pair of long top plates 23, 24 folded inward along the first fold lines 11a to 14a and a pair of short sides. The contents of the face plates 11 and 12 and the pair of long side face plates 13 and 14 change when they are bent inward along the second fold lines 11b to 14b.

  As described above, in addition to the first folding lines 11a to 14a for folding the top plates 21 to 24 constituting the top surface 20, the second for folding the side plates 11 to 14 constituting the side surface 20. Forming the fold lines 11b to 14b, and forming the cuttable lines 15a to 15c extending in the longitudinal direction between the first fold lines 11a to 14a and the second fold lines 11b to 14b. It becomes easy to change the height of 14. As a result, the content of the packaging box can be changed, so that the packaging box can be appropriately sized appropriately according to the size of the product to be packed.

  In the present invention, a pair of long top surface plates 23 and 24, which are detachable from the pair of long side surface plates 13 and 14 and extend in the lateral direction, are formed along the first folding lines 13a and 14a. It is preferable.

As in the above configuration, the cuttable lines 23a and 24a extending in the lateral direction are formed on the first folding lines 13a and 14a located at the boundary between the pair of long top plates 23 and 24 and the pair of long side plates 13 and 14. As a result, the pair of long top plates 23 and 24 can be detached from the pair of long side plates 13 and 14. For example, if the lateral length of the pair of long top plates 23 and 24 is longer than the lateral length of the pair of short top plates 21 and 22, the side plates 11 to 14 are connected to the second folding line. When bent according to 11b to 14b, the pair of long top plates 23 and 24 may not be housed inside the box and may interfere with closing the box. Therefore, such a problem can be solved by making it possible to remove the pair of long top plates 23 and 24 from the pair of long side plates 13 and 14.
Furthermore, since the cuttable lines 23a and 24a extending in the lateral direction are formed on the first folding lines 13a and 14a, the cuttable lines 23a and 24a also function as folding lines. It becomes easy to bend | fold 24 toward the inner side of a box according to 1st fold line 13a, 14a (cutable line | wire 23a, 24a extended in a horizontal direction). Thereby, the operation | work which bends a box and forms the top | upper surface 20 becomes easy.
In addition, it is not preferable to form the cuttable lines 23a and 24a extending in the lateral direction not on the first fold lines 13a and 14a but at positions separated from the first fold lines 13a and 14a by a predetermined distance. That is, as described above, the cuttable lines 23a and 24a extending in the lateral direction serve as a fold line. For this reason, the pair of long top plates 23 and 24 are originally intended to be bent according to the first fold lines 13a and 14a, but are formed at positions separated from the first fold lines 13a and 14a by a predetermined distance. If it does, there exists a possibility that a pair of elongate surface plates 23 and 24 may bend | fold according to the cutable line 23a, 24a extended in this horizontal direction. If it does so, an unnecessary broken line will be formed in a pair of long top plates 23 and 24, and the appearance of a packaging box may worsen, and there is a possibility that the package cannot be stored appropriately.
Therefore, it is preferable that the cuttable lines 23a and 24a extending in the lateral direction are formed on the first fold lines 13a and 14a as in the embodiment of the present invention.

In the present invention, the side surface preferably has a joining piece 16 that is laterally connected to any one of the pair of short side plates 11 and 12 and the pair of long side plates 13 and 14.
In this case, the joining piece 16 extends in the vertical direction from the boundary between the side surface 10 and the top surface 20 to the boundary between the side surface 10 and the bottom surface 30, and the first fold lines 11a to 14a and the second fold lines 11b to 14b. Preferably, a cutable line 15d extending in the vertical direction is formed on the boundary line between the joining piece 16 and the side surface to which the joining piece 16 is connected.

  As in the above-described configuration, the joining piece 16 that forms the side surface 10 by connecting the side plates is moved from the boundary between the side surface 10 and the bottom surface 30 to the boundary between the side surface 10 and the top surface 20, that is, the first folding line 11a. This joining piece 16 fulfills the function of a column by extending in the vertical direction up to the position up to 14a. Thereby, the capacity variable box of the present invention improves durability and strength against external pressure from the vertical direction (vertical direction).

  ADVANTAGE OF THE INVENTION According to this invention, the capacity | capacitance variable box which can change an internal capacity easily according to the packing amount of goods can be provided.

FIG. 1 is an exploded view of a variable capacity box according to an embodiment of the present invention. FIG. 2 shows an example of a perspective view of the variable capacity box. FIG. 3 shows an example of a perspective view of the variable capacity box. FIG. 4 shows an example of a perspective view of the variable capacity box. FIG. 5 shows an example of a perspective view of the variable capacity box. FIG. 6 is an exploded view of a variable capacity box according to another embodiment of the present invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.
In the present specification, the “lateral direction” means a direction in which the side plates forming the side surfaces are connected in the expanded state of the variable capacity box. The “vertical direction” means a direction perpendicular to the horizontal direction in the expanded state of the variable capacity box.

  FIG. 1 shows an exploded view of a variable capacity box 100 according to an embodiment of the present invention. As shown in FIG. 1, the variable capacity box 100 has a side surface 10, a top surface 20, and a bottom surface 30, and has a structure that is a substantially rectangular parallelepiped when assembled. As shown in this development view, the variable capacity box 100 can be formed by assembling a single blank sheet. The blank sheet may be a known corrugated cardboard sheet or cardboard. In the example shown in FIG. 1, the blank sheet is formed by corrugated cardboard, and the eye direction of the corrugated cardboard sheet coincides with the vertical direction.

  As shown in FIG. 1, the side surface 10 includes a substantially rectangular front short side plate 11, a rear short side plate 12, a left long side plate 13, and a right long side plate 14. In the example shown in FIG. 1, these side plates 11 to 14 are, in order from the right in FIG. 1, the rear short side plate 12, the right long side plate 14, the front short side plate 11, and the left long side plate 13. Are connected in the order. Therefore, the side plates 11 to 14 form a pair of short side plates in which the front short side plate 11 and the rear short side plate 12 face each other when the variable capacity box 100 is three-dimensionally assembled. The face plate 13 and the right long side plate 14 form a pair of long side plates facing each other. As shown in FIG. 1, the pair of short side plates 11 and 12 and the pair of long side plates 13 and 14 have different lateral lengths in the unfolded state. In other words, the pair of short side plates 11 and 12 are formed such that the lateral length thereof is shorter than the lateral length of the pair of long side plates 13 and 14. On the other hand, the pair of short side plates 11 and 12 and the pair of long side plates 13 and 14 have substantially the same length in the vertical direction in the unfolded state.

  As shown in FIG. 1, the side surface 10 has a joining piece 16. The joining piece 16 is formed to be connected to a side plate located at one end of the side plates 11 to 14 connected in the lateral direction, and connects the side plate located at one end to the side plate located at the other end. Has the function to do. In the example shown in FIG. 1, the joining piece 16 is formed to extend laterally from the edge of the left long side plate 13 located at one end. For example, the left long side plate 13 and the rear short side plate 12 are connected by applying an adhesive or the like to the joining piece 16 and bonding it to the rear short side plate 12 located at the other end. In the present embodiment, the joining piece 16 is formed to extend in the vertical direction from a fold line provided at the boundary between the bottom surface 30 and the side surface 10 to a fold line provided at the boundary between the top surface 20 and the side surface 10. . Thus, by forming the joining piece 16 from the top surface 20 to the bottom surface 30, the joining piece 16 serves as a support column extending from the top surface 20 to the bottom surface 30 when the box is assembled. As a result, the strength of the box is improved.

  As shown in FIG. 1, the front short side plate 11, the rear short side plate 12, the left long side plate 13, the right long side plate 14, and the joining piece 16 that form the side surface 10 are in the unfolded state. A fold line extending in the vertical direction is formed. According to this fold line, the side plates 11 to 14 and the joining piece 16 are bent inward, and the left long side plate 13 and the rear short side plate 12 are connected via the joining piece 16 so that the side surface 10 has a rectangular tube shape. Assembled.

  Further, as shown in FIG. 1, for each of the side plates 11 to 14, a substantially rectangular front short ceiling plate 21, rear short ceiling plate 22, left long ceiling plate 23, and right long ceiling plate 24. Are connected to each other. That is, the front short side plate 11 is connected to the front short top plate 21, the rear short side plate 12 is connected to the rear short top plate 22, the left long side plate 13 is connected to the left long top plate 23, A right long top plate 24 is connected to the right long side plate 14. As shown in FIG. 1, the pair of short top plates 21 and 22 and the pair of long top plates 23 and 24 have different lateral lengths in the unfolded state. That is, the pair of short top plates 21 and 22 are formed such that the lateral length thereof is shorter than the lateral length of the pair of long top plates 23 and 24. On the other hand, the pair of short top plates 21 and 22 and the pair of long top plates 23 and 24 have substantially the same length in the vertical direction in the unfolded state.

  As shown in FIG. 1, first folding lines 11 a, 12 a, 13 a, and 14 a extending in the lateral direction are formed on the boundary lines of the side plates 11 to 14 and the top plates 21 to 24. These first broken lines 11a to 14a are preferably formed in a straight line in the lateral direction in the unfolded state. The first fold lines 11a to 14a become fold lines when the top plates 21 to 24 are bent when the variable capacity box 100 is assembled.

  Further, as shown in FIG. 1, in the present invention, on the surfaces of the side plates 11 to 14, the second fold lines 11 b and 12 b extending in the lateral direction are provided separately from the first fold lines 11 a to 14 a. , 13b, 14b are formed. The second fold lines 11b to 14b formed on the side plates 11 to 14 are preferably formed in a straight line in parallel with the first fold lines 11a to 14a. The second fold lines 11b to 14b are formed at positions spaced apart from the first fold lines 11a to 14a by a predetermined distance in the vertical direction. The separation distance between the second fold lines 11b to 14b and the first fold lines 11a to 14a can be appropriately designed according to the degree to which the internal capacity of the variable capacity box 100 is changed.

  Further, as shown in FIG. 1, in the present embodiment, the joining piece 16 is a first fold line provided at the boundary between the top surface 20 and the side surface 10 from a fold line provided at the boundary between the bottom surface 30 and the side surface 10. It extends in the vertical direction from 11a to 14a. In such a case, it is preferable that a fold line 16b for bending the joining piece 16 is formed on an extension line of the second fold lines 11b to 14b formed on the side plates 11 to 14. By doing in this way, when each side plate 11-14 is bend | folded according to 2nd fold line 11b-14b so that it may mention later, the joining piece 16 also becomes easy to bend together.

  Moreover, in the area | region between each 1st fold line 11a-14a and each 2nd fold line 11b-14b, the cut | disconnectable line | wire 15a, 15b extended longitudinally along the boundary line of each side plate 11-14, 15c is formed. That is, the cuttable lines 15a, 15b, and 15c extending in the vertical direction are respectively provided between the left long side plate 13 and the front short side plate 11, between the front short side plate 11 and the right long side plate 14, and the right long side. It is formed between the face plate 14 and the rear short side plate 12. Further, as shown in FIG. 1, a cuttable line 15 d extending in the vertical direction is also formed on the boundary line between the left long side plate 13 and the joining piece 16. The cuttable lines 15a to 15d extending in the vertical direction may be cuts (slits) in which the side plates 11 to 14 are separated from each other in advance, or between the side plates 11 to 14 as necessary. The perforation line which can divide between may be sufficient. Further, the cuttable lines 15a to 15d extending in the vertical direction may have a connecting portion in which the side plates 11 to 14 are partially connected (for example, 5 mm). In this case, it is possible to form a small capacity box with little force without using tools. In this case, the connecting portion is preferably provided in the vicinity of the first fold lines 11a to 14a.

  As described above, the second folding lines 11b to 14b extending in the lateral direction are formed on the side plates 11 to 14, and the vertical folding is performed between the first folding lines 11a to 14a and the second folding lines 11b to 14b. By forming the cuttable lines 15a to 15d, the side plates 11 to 14 are partially bent. That is, as shown in FIG. 1, each of the side plates 11 to 14 is surrounded by the first fold lines 11a to 14a, the second fold lines 11b to 11b, and the cuttable lines 15a to 15d extending in the vertical direction. Rectangular regions 11 ′ to 14 ′ are regions that can be bent along the second fold lines 11 b to 11 b.

  Further, as shown in the development view of FIG. 1, in the present embodiment, the pair of long top plates 23 and 24 include cuttable lines 23a and 24a extending in the lateral direction along the first folding lines 13a and 14a. Is formed. The horizontally cuttable lines 23a and 24a are for separating the pair of long top surface plates 23 and 24 from the pair of long side surface plates 13 and 14 along the first folding lines 13a and 14a. The cuttable lines 23a and 24a extending in the lateral direction connect the pair of long top surface plates 23 and 24 to the pair of long side surface plates 13 and 14, but separate the pair of long top surface plates 23 and 24 when necessary. It is formed by perforated lines and zippers that can be used. For example, if the lateral length of the pair of long top plates 23 and 24 is longer than the lateral length of the pair of short top plates 21 and 22, the side plates 11 to 14 are connected to the second folding line. When bent according to 11b to 14b, the pair of long ceiling plates 23 and 24 may not be stored inside the box and may interfere with closing the box, but the cuttable lines 23a and 24a extending in the lateral direction may be disturbed. Such a problem can be solved by providing a pair of long top plates 23 and 24 that can be removed from the pair of long side plates 13 and 14.

  On the other hand, in the present invention, the structure of the bottom surface 30 may be a known structure used for a cardboard case or the like. In the embodiment shown in FIG. 1, the bottom surface 30 has a structure called an automatic lock bottom structure. That is, in the bottom surface 30, the left long bottom surface plate 33 and the right long bottom surface plate 34 are connected to the pair of long side surface plates 13 and 14 in the vertical direction opposite to the top surface 20. A front short bottom plate 31 and a rear short bottom plate 32 are connected to the pair of short side plates 11 and 12 in the vertical direction opposite to the top surface 20. The left long bottom plate 33 has a bottom adhesive piece 33a connected to the front short bottom plate 31 via a fold line at a position near the front short bottom plate 31. Similarly, the left long bottom plate 34 is close to the rear short bottom plate 32. The bottom adhesive piece 33b is connected to the position via a broken line.

  In order to assemble the blank sheet having the above-described structure and make the variable capacity box 100 into a three-dimensional shape, first, the side plates 11 to 14 are bent into a rectangular tube shape, and the joining piece 16 is pasted to the rear short side plate 12. Match. At the same time, the bottom adhesive piece 33a and the front short bottom plate 31 are bonded, the bottom adhesive piece 33b and the rear short bottom plate 32 are bonded, and the left long bottom plate 33 and the left long bottom plate 34 are connected via a fold line. Is folded inward into the box and folded into a flat carton. To package the product, when the side plates 11 to 14 are spread out in a square shape, the left long bottom plate 33 and the left long bottom plate 34 automatically engage to form a flat bottom surface 30. Such a structure of the bottom surface 30 is called an automatic lock bottom structure, and the box can be folded without peeling off the adhesive, and it can be reassembled without using any adhesive material even after the box is folded once. Suitable for on-site work such as in stores.

  FIG. 2 is a perspective view showing a state in which the capacity variable box 100 in the unfolded state shown in FIG. 1 is three-dimensionally assembled. As shown in FIG. 2, by assembling the blank sheet according to the above procedure, the side surface 10 and the bottom surface 30 can be formed, and a box body with the top surface 20 opened can be formed. Thereby, a package can be accommodated in the inside of a box from the opening formed in the top | upper surface 20 side.

  FIG. 3 shows the front short top plate 21, the rear short top plate 22, the left long top plate 23, and the right long top plate 24 according to the first folding lines 11a, 12a, 13a, and 14a from the state shown in FIG. Is shown in a state where the top surface 20 is formed. When the variable capacity box 100 of the present invention is used at the maximum capacity, as shown in FIG. 3, the top plates 21 to 24 are bent according to the first folding lines 11a to 14a, and the top surface 20 side. What is necessary is just to make it close an opening.

  On the other hand, in order to reduce the internal capacity of the variable capacity box 100 of the present invention, the corrugated cardboard sheet is broken along the cuttable lines 23a and 24a extending in the lateral direction, so that the pair of long top plates 23 and 24 are paired. It is preferable to separate from the long side plates 13, 14. FIG. 4 conceptually shows a state in which the pair of long top plates 23 and 24 are separated. However, when closing the opening on the top surface 20 side, if the length of the pair of long side plates 13 and 14 does not get in the way, it is not always necessary to separate the pair of long top surface plates 23 and 24.

  As shown in FIG. 5, when the internal capacity of the variable capacity box 100 is reduced and used, the pair of long top plates 23 and 24 are separated, and then the second folding lines 11b, 12b, 13b, and 14b are followed. The front short side plate 11, the rear short side plate 12, the left long side plate 13, and the right long side plate 14 are partially bent. That is, among the side plates 11 to 14, regions 11 ′ to 14 ′ between the first fold lines 11 a to 14 a and the second fold lines 11 b to 14 b are bent toward the inside of the box. As a result, a part of the region 11 'of the front short side plate 11, the front short top plate 21 connected to the front short side plate 21, and a part of region 12' of the rear short side plate 12 are connected to the rear short side plate. The top plate 22 closes the opening on the top surface 20 side. The opening on the top surface 20 side is also closed by a partial region 13 ′ of the left long side plate 13 and a partial region 14 ′ of the right long side plate 14. In this way, by changing the height of each of the side plates 11 to 14, the capacity variable box 100 of the present invention can change its internal capacity. For example, as shown in FIG. 3, each top plate 21 to 24 is bent at first fold lines 11 a to 14 a to form the top surface 20, and each side plate 11 to 14 as shown in FIG. 5. In the form in which the top surface 20 is formed by bending a part of the box at the second folding lines 11b to 14b, the inner capacity of the box is reduced in the form shown in FIG. In this way, the internal capacity of the variable capacity box 100 of the present invention can be changed as appropriate according to the size of a product or the like stored in the box.

As mentioned above, in this specification, in order to express the content of this invention, preferred embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.
For example, FIG. 6 shows a developed view of a variable capacity box 100 according to an embodiment different from the embodiment shown in FIGS. As shown in FIG. 6, the present invention may be an embodiment in which the cuttable lines 23 a and 24 a (see FIG. 1) extending in the lateral direction are not formed.

  The present invention relates to a variable capacity box formed of, for example, paper cardboard. Therefore, the present invention can be suitably used in the packaging box manufacturing industry, the paper manufacturing industry, the transportation industry, and the like.

DESCRIPTION OF SYMBOLS 10 ... Side surface 11 ... Front short side plate 12 ... Rear short side plate 13 ... Left long side plate 14 ... Right long side plate 11a-14a ... 1st broken line 11b-14b ... 2nd broken line 15a-15d ... Longitudinal direction Extendable cut line 16 ... Joint piece 20 ... Top face 21 ... Front short top face plate 22 ... Rear short top face plate 23 ... Left long top face plate 24 ... Right long top face plate 23a, 24a ... Horizontally cuttable line 30 ... Bottom face 31 ... Front short bottom plate 32 ... Rear short bottom plate 33 ... Left long bottom plate 34 ... Right long bottom plate 100 ... Variable capacity box

Claims (1)

A side surface (10) formed by connecting a pair of short side plates (11, 12) facing each other and a pair of long side plates (13, 14) facing each other in the lateral direction;
For each of the pair of short side plates (11, 12) and the pair of long side plates (13, 14), a first fold line (11a, 12a, 13a, 14a) extending in the lateral direction is used to A top surface (20) having a pair of short top plates (21, 22) and a pair of long top plates (23, 24) connected in a direction;
A bottom surface (30) formed to be connected to the side surface (10) in a vertical direction opposite to the top surface (20),
Said side surface (10)
The pair of short side plates (11, 12) and the pair of long side plates (13, 14) are formed at positions separated from the first folding lines (11a, 12a, 13a, 14a) by a predetermined distance. , Second fold lines (11b, 12b, 13b, 14b) extending in the lateral direction;
Between the first fold line (11a, 12a, 13a, 14a) and the second fold line (11b, 12b, 13b, 14b), the pair of short side plates (11, 12) and the pair of pair A longitudinally cuttable line (15a, 15b, 15c) formed on each boundary line of the long side plates (13, 14);
A joining piece (16) connected laterally to any one of the pair of short side plates (11, 12) and the pair of long side plates (13, 14);
The joining piece (16)
Extending from the boundary between the side surface (10) and the top surface (20) to the boundary between the side surface (10) and the bottom surface (30),
Between the first fold line (11a, 12a, 13a, 14a) and the second fold line (11b, 12b, 13b, 14b), the joining piece (16) and the joining piece are connected. On the boundary line between the side plates (11, 12, 13, 14), a cuttable line (15d) extending in the vertical direction is formed,
As a result,
When the pair of short top plates (21, 22) and the pair of long top plates (23, 24) are folded inward along the first fold line (11a, 12a, 13a, 14a);
A box when the pair of short side plates (11, 12) and the pair of long side plates (13, 14) are folded inward along the second fold line (11b, 12b, 13b, 14b). are those in which the capacity of the changes,
The pair of long top plates (23, 24) can be removed from the pair of long side plates (13, 14), and the transversely extending cutable lines (23a, 24a) are the first folding lines (13a, 14a) A variable capacity box formed along the top .

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