JP6947089B2 - Variable size box - Google Patents

Description

The present invention relates to a packaging box whose size can be changed. Specifically, the present invention relates to a packaging box in which a single blank sheet can be assembled into a plurality of patterns having different sizes (box height or bottom area).

Conventionally, a tatami paper type packaging box capable of efficiently packaging products of different sizes and products of different quantities has been known (Patent Document 1). In this packaging box, a blank such as a cardboard is used, and a square bottom surface is formed by a ruled line in the center of the blank, and the width surface direction and the length surface direction of the blank are centered on the bottom surface portion. A plurality of dimensional adjustment rule lines corresponding to the height of the box are provided in parallel, and zippers that can be separated in the length plane direction are provided at the four corners of the bottom surface portion. As a result, in this packaging box, the front and rear ends in the length plane direction and the left and right ends in the width plane direction are bent along one ruled line selected from a plurality of ruled lines and overlapped with each other to form a single blank. It is possible to assemble three types of boxes with different box heights and bottom areas. Specifically, the packaging box of Patent Document 1 has a box height: minimum / bottom area: maximum first pattern, box height: medium / bottom area: medium second pattern, box. It is possible to assemble with the third pattern, which is the height: maximum and bottom area: minimum.

Japanese Unexamined Patent Publication No. 2010-235148

However, in the packaging box of Patent Document 1, the changeable size pattern is limited to three patterns, and the packaging state may still be inefficient depending on the shape and quantity of the product to be packaged. In particular, in the packaging box of Patent Document 1, the bottom area becomes smaller when the box height is increased, and the box height becomes lower when the bottom area is increased. Therefore, the box height and the bottom area are in an inversely proportional relationship. When packaging products, there are many requests to reduce the bottom area while maintaining the height of the box in order to prevent the product from shaking inside the box. However, a box like the packaging box of Patent Document 1 is used. There is a problem that it is difficult to meet such a demand with a structure in which the height and the bottom area are variable in inverse proportion.

Therefore, it is a main object of the present invention to increase the number of patterns having a changeable size in a packaging box in which a plurality of patterns having different sizes can be assembled.

As a result of diligent studies on means for solving the problems of the above-mentioned conventional invention, the inventor of the present invention, while maintaining the basic shape of the packaging box of Patent Document 1, places the connecting flaps provided at the four corners at predetermined locations. We found that it is possible to increase the pattern of changeable size by forming a separable line. Then, the present inventor has come up with the idea that the problems of the conventional invention can be solved based on the above findings, and has completed the present invention. Specifically, the present invention has the following configuration.

The present invention relates to a packaging box capable of assembling a plurality of patterns having different box heights or bottom areas from a single blank sheet. As for the assembly pattern, if either the box height or the bottom area is different, it is counted as one pattern. The packaging box according to the present invention is preferably resized to at least 4 patterns or more, and particularly preferably 5 patterns or more or 6 patterns or more.

The packaging box according to the present invention basically includes a bottom surface portion 10, a pair of height adjusting side surface portions 20, a pair of bottom area adjusting side surface portions 30, and four connecting flaps 40. The bottom surface portion 10 has a quadrangular shape in which four sides are defined by four ruled lines 11. The height adjusting side surface portion 20 is connected to two parallel sides constituting the bottom surface portion 10, and a plurality of ruled lines 21 parallel to the two sides are formed. The bottom area adjusting side surface portion 30 is connected to two parallel sides constituting the bottom surface portion 10, and a plurality of ruled lines 31 parallel to the other two sides are formed. The connecting flaps 40 are connected to the left and right sides of each of the pair of height adjusting side surface portions 20 via ruled lines, and extend in the same direction as the bottom area adjusting side surface portions 30. The connection flap 40 is connected to another connection flap 40 that faces when the packaging box is assembled. The connection method is not particularly limited, and may be engaged with the meshing groove or opening provided in the connection flap 40, or the overlapping portion between the connection flaps 40 may be fixed with an adhesive, staples, or a mechanical fastener. Then, the connecting flaps 40 may be fixed to each other by using different parts. The packaging box of the present invention is characterized in that each of the connecting flaps 40 has a separable line 42 on at least one extension line of a plurality of ruled lines 21 formed on the height adjusting side surface portion 20. do. The separable line 42 may exist on the extension line of the ruled line 21 of the height adjusting side surface portion 20, and does not need to be connected to the height adjusting side surface portion 20.

By forming the separable lines 42 for adjusting the bottom area at at least one place (preferably at a plurality of places) on each connection flap 40 as in the above configuration, it is possible to increase the size pattern of the packaging box by one or more. can. For example, in the case of a packaging box structure in which the size can be changed to 3 patterns when the separable line 42 is not provided, the number of patterns can be increased to 6 patterns by providing the separable line 42. In particular, by providing the separable wire 42 on the connecting flap 40, it is possible to change the size such that the bottom area is reduced while maintaining the box height. As a result, the product can be brought into close contact with the inner wall of the packaging box without packing a cushioning material or the like in the packaging box, so that the packaging state of the product can be made more efficient.

In the packaging box according to the present invention, the height adjusting side surface portion 20 preferably has first to third ruled lines 21 (a to c) for height adjustment. The first ruled line 21 (a) is formed at a distance corresponding to the lowest box height (A) from the ruled line 11 of the bottom surface portion 10. The second ruled line 21 (b) is formed at a distance corresponding to a medium box height (B) from the ruled line 11 of the bottom surface portion 10. The third ruled line 21 (c) is formed at a distance corresponding to the highest box height (C) from the ruled line 11 of the bottom surface portion 10. In this case, the separable line 42 is preferably formed on an extension of both the first ruled line 21 (a) and the second ruled line 21 (b). In this way, by increasing the number of separable lines 42 for adjusting the bottom area, the number of patterns of the size of the packaging box can be further increased. In particular, according to the packaging box of the present invention, it is possible to assemble 6 or more patterns having different box heights or bottom areas.

In the packaging box according to the present invention, when the number of steps of the changeable box height is N, N or more ruled lines 21 are formed on the height adjusting side surface portion 20, and the bottom area adjusting side surface portion 30 It is preferable that 2N or more ruled lines 31 are formed in the area. In the conventional packaging box described in Patent Document 1, the changeable box height can be changed in three stages, and three ruled lines are formed on the side surface for height adjustment for adjusting the bottom area. Five ruled lines are formed on the side surface portion. On the other hand, in the present invention, the number of patterns of the size of the packaging box is increased by increasing the number of ruled lines 31 formed on the side surface portion 30 for adjusting the bottom area by one or more as compared with the conventional packaging box. However, it becomes easier to maintain the shape of the assembled packaging box in a substantially rectangular parallelepiped shape.

According to the present invention, it is possible to provide a packaging box in which the number of patterns having a changeable size is increased.

FIG. 1 shows a blank sheet of a packaging box according to an embodiment. FIG. 2 shows the relationship between the box height and the bottom area of each size of the packaging box that can be resized into 6 patterns. FIG. 3 schematically shows how to assemble the first pattern in which the box height: minimum and bottom area: maximum. FIG. 4 schematically shows how to assemble the second pattern in which the box height is medium and the bottom area is medium. FIG. 5 schematically shows how to assemble the third pattern in which the box height: maximum and bottom area: minimum. FIG. 6 schematically shows how to assemble the fourth pattern in which the box height is the minimum and the bottom area is the medium. FIG. 7 schematically shows how to assemble the fifth pattern in which the box height is the minimum and the bottom area is the minimum. FIG. 8 schematically shows how to assemble the sixth pattern in which the box height is the minimum and the bottom area is the medium. FIG. 9 shows an example of a sign indicating a ruled line to be bent according to the size of the bottom area. FIG. 10 shows another example of the connecting means formed on the connecting flap.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the forms described below, and includes those which are appropriately modified by those skilled in the art from the following forms to the extent obvious to those skilled in the art.

In the specification of the present application, expressions such as "almost" and "≈" mean that a difference of ± 5 mm is allowed. Further, FIG. 1 shows a Cartesian coordinate system of the X-axis and the Y-axis for convenience. In the specification of the present application, the X-axis direction is the left-right direction of the packaging box, and the Y-axis direction is the front-rear direction of the packaging box.

FIG. 1 shows an example of the state of the blank sheet before assembling the packaging box 100. As shown in FIG. 1, the packaging box 100 of the present invention can be assembled from a single blank sheet. A plurality of ruled lines and separable lines are formed on the blank sheet of the packaging box 100. The packaging box 100 can be assembled by adjusting the box height and bottom area, and in order to obtain the required box height and bottom area, the packaging box 100 is bent with an appropriate ruled line and the sheet is separated by an appropriately separable line. .. An example of the blank sheet constituting the packaging box 100 is a corrugated cardboard sheet, but a paper sheet such as cardboard, a plastic sheet, a metal sheet, or the like can also be used.

As shown in FIG. 1, a square bottom surface portion 10 is provided at the center of the blank sheet. The bottom surface portion 10 is a portion that always constitutes the bottom surface of the packaging box 100, no matter how the bottom area of the packaging box 100 is changed. A pair of front and rear height adjusting side surface portions 20 and a pair of left and right bottom area adjusting side surface portions 30 are connected to the bottom surface portion 10 in a cross shape. That is, the bottom surface portion 10 is a quadrangular region in which four sides are defined by four ruled lines 11. In the example shown in FIG. 1, the bottom surface portion 10 has a rectangular shape whose length is the front-back direction (Y direction) of the packaging box, but the bottom surface portion 10 may be square or packaged. The box may have a rectangular shape with the left-right direction (X direction) as the length. A pair of height adjusting side surface portions 20 are connected to each of the two ruled lines 11 (a) and (b) extending in parallel with the left-right direction (X direction) of the packaging box. Each of the height adjusting side surface portions 20 is a panel extending in the front-rear direction (X direction) of the packaging box. Further, a pair of bottom area adjusting side surface portions 30 are connected to each of the two ruled lines 11 (c) and (d) extending in parallel with the front-rear direction (Y direction) of the packaging box. Each of the bottom area adjusting side surface portions 30 is a panel extending in the left-right direction (Y direction) of the packaging box.

A plurality of ruled lines 21 for adjusting the height of the packaging box 100 are formed on each of the height adjusting side surface portions 20. Each ruled line 21 of the height adjusting side surface portion 20 extends parallel to the left-right direction (X direction) of the packaging box. In the example shown in FIG. 1, three ruled lines 21 of the height adjusting side surface portion 20 are provided, and the first ruled line 21 (in order from the front and rear ruled lines 11 (a, b) of the bottom surface portion 10) a), the second ruled line 21 (b), and the third ruled line (c). The distance from the ruled line 11 (a, b) of the bottom surface 10 to the first ruled line 21 (a) corresponds to the lowest box height (A), and the distance to the second ruled line 21 (b). Corresponds to the medium box height (B) and the distance to the third ruled line 21 (c) corresponds to the highest box height (C).

To make the box height the lowest, the blank sheet is bent at the ruled line 11 (a, b) of the bottom surface portion 10 and the first ruled line 21 (a) of the height adjusting side surface portion 20. When the box height is medium, the blank sheet is bent at the ruled line 11 (a, b) of the bottom surface portion 10 and the second ruled line 21 (b) of the height adjusting side surface portion 20. When the box height is maximized, the blank sheet is bent along the ruled lines 11 (a, b) of the bottom surface portion 10 and the third ruled line 21 (c) of the height adjusting side surface portion 20. As described above, in the present embodiment, the height of the packaging box 100 can be changed in three stages. That is, the number of ruled lines 21 of the height adjusting side surface portion 20 corresponds to the number of steps N of the box height that can be changed. In this way, when assembling the packaging box 100, the box height of the packaging box 10 can be changed by changing the ruled lines 21 (a to c) that bend the height adjusting side surface portion 20. Each box height (A to C) can be appropriately designed, but for example, B may be designed twice as much as A, C may be designed three times as much as A, and so on.

Each of the bottom area adjusting side surface portions 30 is used to adjust the bottom area of the packaging box 100 and to align the bent position of the bottom area adjusting side surface portion 30 with the bent position of the height adjusting side surface portion 20. A ruled line 31 is formed. Each ruled line 31 of the bottom area adjusting side surface portion 30 extends parallel to the front-rear direction (Y direction) of the packaging box. In the example shown in FIG. 1, six ruled lines 31 of the side surface portion 30 for adjusting the bottom area are provided, and the first ruled line 31 (in order from the left and right ruled lines 11 (c, d) of the bottom surface portion 10) a), the second ruled line 31 (b), the third ruled line 31 (c), the fourth ruled line 31 (d), the fifth ruled line 31 (e), and the sixth ruled line 31 (f).

First, when adjusting the bottom area of the packaging box 100, when the bottom area is minimized, the blank sheet is bent along the ruled lines 11 (c, d) of the bottom surface portion 10. When the bottom area is medium, the blank sheet is bent along the first ruled line 31 (a) of the bottom area adjusting side surface portion 30. When the bottom area is maximized, the blank sheet is bent along the second ruled line 31 (a) of the bottom area adjusting side surface portion 30. As described above, the present embodiment is designed so that the bottom area of the packaging box 100 can be changed in three stages. Further, as shown in FIG. 1, each of the ruled line 11 (c, d) of the bottom surface portion 10, the first ruled line 31 (a) of the side surface portion 30 for adjusting the bottom area, and the second ruled line 31 (b). Is provided with a sign near each ruled line to clearly indicate the size of the bottom area when the blank sheet is bent.

Here, in the case of the "first pattern" in which the box height is maximized and the bottom area is minimized, the blank sheet is provided with the ruled lines 11 (c, d) of the bottom surface 10 and the bottom area adjusting side surface 30. Bend along the sixth ruled line 31 (f) of. Therefore, the distance (C') from the ruled line 11 (c, d) of the bottom surface portion 10 to the sixth ruled line 31 (f) of the side surface portion 30 for adjusting the bottom area is the maximum box height (C) described above. It is designed to be almost equal to (C≈C'). Further, in the case of the "second pattern" in which the box height is medium and the bottom area is medium, the blank sheet is used as the first ruled line 31 (a) and the first ruled line 31 (a) of the bottom area adjusting side surface portion 30. Bend along the ruled line 31 (e) of 5. Therefore, the distance (B') from the first ruled line 31 (a) to the fifth ruled line 31 (e) of the bottom area adjusting side surface portion 30 is substantially the same as the above-mentioned medium box height (B). Equally designed (B≈B'). Further, in the case of the "third pattern" in which the box height is medium and the bottom area is maximized, the blank sheet is used as the second ruled line 31 (b) and the fourth ruled line 31 (b) of the bottom area adjusting side surface portion 30. Bend along the ruled line 31 (d) of. Therefore, the distance (A') from the second ruled line 31 (b) to the fourth ruled line 31 (d) of the bottom area adjusting side surface portion 30 is substantially equal to the above-mentioned minimum box height (A). It is designed (A≈A'). In this way, the distance between the ruled lines is set so as to satisfy the relationships of A≈A', B≈B', and C≈C'. These relationships are also disclosed in Patent Document 1.

In addition to the above, in the packaging box 100 of the present invention, the "fourth pattern" in which the box height is minimized and the bottom area is medium, the box height is minimized, and the bottom area is set. The size of the packaging box can be changed to the minimum "fifth pattern" and the "sixth pattern" in which the box height is medium and the bottom area is the minimum. In the case of the above "fourth pattern", the blank sheet is bent at the first ruled line 31 (a) and the third ruled line 31 (c) of the bottom area adjusting side surface portion 30. Therefore, the distance (A1) from the first ruled line 31 (a) to the third ruled line 31 (c) of the bottom area adjusting side surface portion 30 is designed to be substantially equal to the above-mentioned minimum box height (A). (A≈A1). Further, in the case of the above "fifth pattern", the blank sheet is bent at the ruled line 11 (c, d) of the bottom surface portion 10 and the second ruled line 31 (b) of the side surface portion 30 for adjusting the bottom area. Therefore, the distance (A2) from the ruled line 11 (c, d) of the bottom surface portion 10 to the second ruled line 31 (b) of the side surface portion 30 for adjusting the bottom area is the same as the above-mentioned minimum box height (A). It is designed to be almost equal (A≈A2). Further, in the case of the above "sixth pattern", the blank sheet is bent at the ruled line 11 (c, d) of the bottom surface portion 10 and the fourth ruled line 31 (d) of the side surface portion 30 for adjusting the bottom area. Therefore, the distance (B1) from the ruled line 11 (c, d) of the bottom surface portion 10 to the fourth ruled line 31 (d) of the side surface portion 30 for adjusting the bottom area is the above-mentioned medium box height (B). It is designed to be almost equal to (B≈B1). As described above, in the present embodiment, in addition to the conventional first to third patterns, various types of bottom area adjusting side surface portions 30 can be formed so that the size of the packaging box can be further changed by the fourth to sixth patterns. Ruled line 31 is formed. The third ruled line 31 (c) of the bottom area adjusting side surface portion 30 is a ruled line not disclosed in Patent Document 1. Further, in the present invention, it is preferable that the number of ruled lines 31 of the bottom area adjusting side surface portion 30 is provided at least twice the number of steps N of the changeable box height. For example, in a configuration in which the box height can be adjusted in three stages, it is preferable that the side surface portion 30 for adjusting the bottom area is provided with six or more or seven or more ruled lines 31.

As shown in FIG. 1, connecting flaps 40 are provided at each of the four corners of the bottom surface portion 10. The connection flap 40 is a flap-shaped panel connected to the left and right sides of each of the pair of height adjusting side surface portions 20 via ruled lines. The ruled line located at the boundary between the connecting flap 40 and the height adjusting side surface portion 20 corresponds to an extension line of the ruled line 11 (c, d) located at the boundary between the bottom surface portion 10 and the bottom area adjusting side surface portion 30. When the blank sheet is bent along the ruled line 11 (c, d) of the bottom surface portion 10 when assembling the packaging box, the connecting flap 40 is also bent on the extension line of the ruled line 11 (c, d). Further, in the connecting flap 40, a ruled line is formed on each extension of the first ruled line 31 (a) and the second ruled line 31 (b) of the bottom area adjusting side surface portion 30. When the blank sheet is bent along the first ruled line 31 (a) or the second ruled line 31 (b) of the bottom area adjusting side surface portion 30 when assembling the packaging box, the connecting flap 40 is also the respective ruled line 31 ( Bend along the extension of a and b). Each connecting flap 40 extends in the same direction (that is, in the X direction) as the bottom area adjusting side surface portion 30. The length of each connection flap 40 in the X-axis direction may be designed to be at least half the length of the ruled line 11 (c, d) between the bottom surface portion 10 and the bottom surface area adjusting side surface portion 30.

Further, as shown in FIG. 1, the connection flap 40 is provided on the upper stage (the section corresponding between the third ruled line 21 (c) and the second ruled line 21 (b) of the height adjusting side surface portion 20). And the middle stage (the section corresponding to the section between the second ruled line 21 (b) and the first ruled line 21 (a) of the height adjusting side surface portion 20) and the lower stage (the first of the height adjusting side surface portion 20). The section is divided from the ruled line 21 (a) of No. 1 to the ruled line 11 (a, b) of the bottom surface portion 10). The upper part of the connecting flap 40 extends from the extension line of the ruled line 11 (c, d) of the bottom surface portion 10 to the extension line of the first ruled line 31 (a) of the side surface portion 30 for adjusting the bottom area. The middle stage of the connection flap 40 extends from the extension line of the ruled line 11 (c, d) of the bottom surface portion 10 to the second ruled line 31 (b) of the side surface portion 30 for adjusting the bottom area. The lower part of the connecting flap 40 extends from the extension line of the ruled line 11 (c, d) of the bottom surface portion 10 by a predetermined length. As described above, the predetermined length here may be half or more of the length of the ruled line 11 (c, d) between the bottom surface portion 10 and the bottom surface area adjusting side surface portion 30.

A cut or a separable line is formed between each connecting flap 40 and the bottom area adjusting side surface portion 30. Specifically, the connection flap 40 is for adjusting the bottom area in the range from the ruled line 11 (c, d) of the bottom surface portion 10 to the second ruled line 31 (b) of the side surface portion 30 for adjusting the bottom area. It is separably connected to the side surface portion 30 via a separable line 41. The separable line 41 is mainly used for adjusting the height of the box. The height-adjustable separable line 41 is a first separable line provided in the range from the second ruled line 31 (b) to the first ruled line 31 (a) of the bottom area adjusting side surface portion 30. 41 (a) and a second separable line 41 (b) provided in the range from the first ruled line 31 (a) of the bottom area adjusting side surface portion 30 to the ruled line 11 (c, d) of the bottom surface portion 10. ) And. On the other hand, the connecting flap 40 is separated from the bottom area adjusting side surface portion 30 by a cut in the range outside the second ruled line 31 (b) of the bottom area adjusting side surface portion 30 in the left-right direction.

Further, as one of the features of the present invention, each connection flap 40 can be separated on the extension line of the ruled line 21 formed on the height adjusting side surface portion 20, which is mainly used when adjusting the bottom area. The line 42 is formed. That is, a third separable line 42 (a) and a fourth separable line 42 (b) are formed on the extension line of the first ruled line 21 (a) of the height adjusting side surface portion 20. .. The third separable line 42 (a) is provided over a range from the extension line of the second ruled line 31 (b) of the bottom area adjusting side surface portion 30 to the extension line of the first ruled line 31 (a). Has been done. Further, the fourth separable line 42 (b) extends from the extension line of the first ruled line 31 (a) of the side surface portion 30 for adjusting the bottom area to the extension line of the ruled line 11 (c, d) of the bottom surface portion 10. It is provided over a range. Further, a fifth separable line 42 (c) is formed on the extension line of the second ruled line 21 (b) of the height adjusting side surface portion 20. The fifth separable line 42 (c) is set to have a length substantially equal to that of the fourth separable line 42 (b). That is, the fifth separable line 42 (c) is from the extension line of the first ruled line 31 (a) of the bottom area adjusting side surface portion 30 to the extension line of the ruled line 11 (c, d) of the bottom surface portion 10. It is provided over a range. The connecting flap 40 is provided by the third to fifth separable lines 42 (a, b, c) in the left-right direction as necessary, from the edge in the left-right direction to the range reaching the height adjusting side surface portion 20. It will be separated in the (X direction).

Further, a connecting means 43 is provided on the tip end side of the lower stage of the connecting flap 40. The connecting means 43 functions to maintain the shape of the packaging box by connecting the connecting flaps 40 facing each other when assembling the packaging box. In the example shown in FIG. 1, the connecting means 43 is provided with a plurality of meshing grooves formed according to the number of steps of the adjustable bottom area (three steps in this example). The meshing groove fits into the meshing groove of the connecting flap 40 that faces each other when the box is assembled.

FIG. 2 schematically shows a pattern of the size of the packaging box that can be assembled in the present embodiment and a separable line used for assembling the pattern. Further, in FIGS. 3 to 8, the ruled line to be bent when assembling the above-mentioned first pattern to the sixth pattern is indicated by a “thick line”, and the separable line to be broken is indicated by a “zigzag line”.

As shown in FIGS. 2 and 3, in order to make the size of the packaging box the first pattern (box height: minimum, bottom area: maximum), the blank sheet is provided with a pair of front and rear bottom 11 ruled lines 11. (A, b), with the first ruled line 21 (a) of the height adjusting side surface portion 20, the second ruled line 31 (b) of the bottom area adjusting side surface portion 30, and the fourth ruled line 31 (d). Bend. In the first pattern, it is not necessary to break the separable lines 41 and 42 of the connecting flap 40.

As shown in FIGS. 2 and 4, in order to make the size of the packaging box the second pattern (box height: medium, bottom area: medium), the first separable line of the connecting flap 40 After breaking 41 (a), the blank sheet is used for the front and rear pair of bottom surface 11 ruled lines 11 (a, b), the height adjustment side surface portion 20, the second ruled line 21 (b), and the bottom area adjustment. The side surface portion 30 is bent at the first ruled line 31 (a) and the fifth ruled line 31 (e).

As shown in FIGS. 2 and 5, in order to set the size of the packaging box to the third pattern (box height: maximum, bottom area: minimum), the first separable line 41 of the connecting flap 40 (the first separable line 41 (box height: maximum, bottom area: minimum)) After breaking a) and the second separable line 41 (b), the blank sheet is placed on the ruled lines 11 (a, b, c, d) of each bottom surface 11 and the third side portion 20 for height adjustment. 21 (c) and the sixth ruled line 31 (e) of the bottom area adjusting side surface portion 30 are bent.

As shown in FIGS. 2 and 6, in order to make the size of the packaging box the fourth pattern (box height: minimum, bottom area: medium), the first separable line 41 of the connecting flap 40 is used. After breaking the (a) and the third separable line 42 (a), the blank sheet is placed on the front and rear pair of bottom surface 11 ruled lines 11 (a, b) and the first side portion 20 for height adjustment. It is bent at the ruled line 21 (a), the first ruled line 31 (a) of the bottom area adjusting side surface portion 30, and the third ruled line 31 (c).

As shown in FIGS. 2 and 7, in order for the size of the packaging box to be in the fifth pattern (box height: minimum, bottom area: minimum), the first separable line 41 of the connecting flap 40 ( After breaking a), the second separable line 41 (b), the third separable line 42 (a), and the fourth separable line 42 (b), a blank sheet is placed on the bottom surface 11 of each. The ruled line 11 (a, b, c, d), the first ruled line 21 (a) of the height adjusting side surface portion 20, and the second ruled line 31 (a) of the bottom area adjusting side surface portion 30 are bent.

As shown in FIGS. 2 and 8, in order to make the size of the packaging box into the sixth pattern (box height: medium, bottom area: minimum), the first separable line 41 of the connecting flap 40 is used. (A), the second separable line 41 (b), and the fifth separable line 42 (c) are broken, and then the blank sheet is placed on the ruled lines 11 (a, b, c, etc.) on the bottom surface 11. d), Bend along the second ruled line 21 (b) of the height adjusting side surface portion 20 and the fourth ruled line 31 (d) of the bottom area adjusting side surface portion 30.

After bending the blank sheet according to the desired box height and bottom area as described above, a packaging box of an appropriate size can be assembled by connecting the opposing connection flaps 40 using the connecting means 43.

8 (a) to 8 (e) show examples of signs showing ruled lines to be bent according to the size of the bottom area, respectively. In FIG. 8A, different types of embossing are added on the ruled line. In FIG. 8B, perforations having different pitches are formed on the ruled lines. In FIG. 8C, characters such as "large", "medium", and "small" are added in the vicinity of the ruled line. In FIG. 8D, symbols such as “○○○”, “○○”, and “○” are added near the ruled line. In FIG. 8 (e), different kinds of colors are given on the ruled lines. By adding signs to the ruled lines according to the size of the bottom area in this way, it becomes easier to understand how to assemble the box.

FIG. 9 shows another example of the connecting means provided on the connecting flap 40. In the example shown in FIG. 9, one of the pair of connecting flaps 40 facing each other at the time of assembly is provided with a belt portion having a ratchet type fine notch, and the other has an opening for inserting the belt portion. Is provided. Therefore, by inserting the belt portion of one connecting flap 40 into the opening of the other connecting flap 40, both are connected. In this way, it is possible to make the connection means a stepless structure.

As described above, in the specification of the present application, in order to express the content of the present invention, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and includes modifications and improvements which are obvious to those skilled in the art based on the matters described in the present specification.

For example, in the embodiment shown in the drawing, the size of the packaging box can be changed into 6 patterns, but if the number of ruled lines and the distance between the ruled lines are designed according to the technical idea explained using this embodiment, the number of ruled lines and the distance between the ruled lines can be designed. It is also possible to make the size deformation pattern of the packaging box only 4 patterns, 5 patterns only, or 7 patterns or more.

The present invention relates to a packaging box whose size can be changed. Therefore, the present invention can be suitably used in the manufacturing industry of packaging boxes and the like.

10 ... Bottom part 11 ... Bottom side ruled line 20 ... Height adjusting side surface 21 ... Height adjusting ruled line 30 ... Bottom area adjusting side surface 31 ... Bottom area adjusting ruled line 40 ... Connection flap 41 ... Height Detachable line for adjustment 42 ... Detachable line for bottom area adjustment 43 ... Connection means 100 ... Packaging box

Claims (3)

A packaging box that can be assembled from a single blank sheet in multiple patterns with different box heights or bottom areas.
A square bottom surface (10) whose four sides are defined by four ruled lines (11), and
A pair of height adjusting side surface portions (20) which are connected to two parallel sides constituting the bottom surface portion (10) and have a plurality of ruled lines (21) parallel to the two sides.
A pair of side surface portions (30) for adjusting the bottom area, which are connected to two parallel sides constituting the bottom surface portion (10) and have a plurality of ruled lines (31) parallel to the other two sides. ， ，
A total of four connecting flaps (40) that are connected to the left and right sides of each of the pair of height adjusting side surfaces (20) via ruled lines and extend in the same direction as the bottom area adjusting side surface (30). ) And
The connecting flap (40) has, on at least one extension of a plurality of ruled lines formed in the height adjusting flanks (20) (21), possess detachable wire (42),
When the number of steps of the box height that can be changed is N, N or more ruled lines (21) are formed on the height adjusting side surface portion (20), and the bottom area adjusting side surface portion (30) is formed. ) Is a packaging box in which 2N or more ruled lines (31) are formed. The height adjusting side surface portion (20) is
The first ruled line (21 (a)) formed at a distance corresponding to the lowest box height (A) from the ruled line (11) of the bottom surface portion (10), and
A second ruled line (21 (b)) formed at a distance corresponding to a medium box height (B) from the ruled line (11) of the bottom surface portion (10).
It has a third ruled line (21 (c)) formed at a distance corresponding to the highest box height (C) from the ruled line (11) of the bottom surface portion (10).
The packaging box according to claim 1, wherein the separable line (42) is formed on an extension of the first ruled line (21 (a)) and the second ruled line (21 (b)). The packaging box according to claim 2, wherein six or more patterns with different box heights or bottom areas can be assembled from one blank sheet.

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