Packing box

Abstract

To provide a one-side opening / closing type packaging box capable of reducing the cost of paperboard and suppressing an increase in connection work.SOLUTION: A packaging box 100 is formed by combining a body 30 and a lid 40 each of which is formed of a single sheet-like paper blank. An outer flap 11A of the body 30 has a first engagement part 70, and the lid 40 has a second engagement part 80, respectively. The first engagement part 70 has a first notch 71 formed spaced from one side edge of the outer flap 11A, a first cut line 72 extending in a same direction from each first notch 71, and a first fold line 73 extending from the tip of each first cut line 72 extending from the first notch 71 to one side edge of the outer flap 11A. The second engagement part 80 has a configuration similar to that of the first engagement part 70.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a packaging box. [Background technology]

[0002] Generally, packaging boxes for transporting cut flowers and the like are of a single-sided opening / closing type, in which the lid opens and closes from one side, rather than a double-door type, in which the lid opens and closes from both sides, so that the contents can be easily seen when the lid is open.

[0003] Patent Document 1 discloses a packaging box comprising a box-shaped main body portion having a cutout formed in the front portion and an open top, and a secondary body portion bonded to the back portion of the main body portion and covering the opening at the top of the main body portion and the cutout, the main body portion and secondary body portion both being formed from a single flat blank. The main body portion has a separation portion at its back portion that can be separated via a score line. The secondary body portion can be removed by breaking the score line and separating the separation portion from the main body portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-18884 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a conventional one-side opening packaging box is made from a single blank, the blank has four continuous sides in one direction, and the part that makes up the lid is continuous with the part that makes up one side. Therefore, when cutting multiple blanks from a single sheet of corrugated cardboard (the corrugated cardboard material), there is a problem that a large portion is not effectively used, reducing efficiency.

[0006] Furthermore, in the case of a retractable packaging box made up of two blanks, for example, one blank has a section where the section that forms the bottom is continuous with the section that forms the side of one blank, and the two side surfaces are continuous in one direction, and another blank has a section where the section that forms the lid is continuous with the section that forms the side of one blank, and the two side surfaces are continuous in one direction. To connect these two blanks, at least two flaps are required to connect the sections that form the sides. Providing two flaps in this way requires connecting them in two places, which can lead to the problem of reduced work efficiency.

[0007] The present invention has been made in consideration of the above circumstances, and aims to provide a packaging box that can be opened and closed on one side, which can reduce the cost of paperboard and prevent an increase in joining work. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a packaging box formed by combining a first plate and a second plate, each formed from a single sheet-like paper blank, wherein the first plate has a first interlocking portion and the second plate has a second interlocking portion, the first interlocking portion having a plurality of first notches formed at intervals from one side edge of the first plate, first cut lines extending in the same direction from each of the first notches, and first fold lines extending from the tip ends of each of the first cut lines extending from the first notches to the one side edge of the first plate, and the second interlocking portion having a plurality of second notches formed at intervals from one side edge of the second plate, second cut lines extending in the same direction from each of the second notches, and second fold lines extending from the tip ends of each of the second cut lines extending from the second notches to the one side edge of the first plate.

[0009] According to the present invention, the portion located between the first notches of the first meshing portion (first central meshing portion) and the portion located between the second notches of the second meshing portion (second central meshing portion) are in planar contact with each other, and the portion located between the first notch of the first meshing portion and the end of the first plate (first side meshing portion) and the portion located between the second notch of the second meshing portion and the end of the second plate (second side meshing portion) are in planar contact with each other, and further, the central meshing portion and the side meshing portions are positioned alternately, thereby making it possible to stably assemble the first plate and the second plate.

[0010] This assembly can be easily performed by a single worker without the need for a connecting agent or connecting machine, and it also reduces the cost of the paperboard compared to connecting using flips.

[0011] Furthermore, since the first cut line of the first meshing portion and the second cut line of the second meshing portion interlock with each other, the meshing between the first plate body and the second plate body will not be released unless the first plate body and the second plate body are slid relative to each other so that the first cut line and the second cut line move apart, and the assembly is stable.

[0012] In addition, the end of the first plate, which is easily bent along the first fold line, easily climbs onto the second plate, and the end of the second plate, which is easily bent along the second fold line, easily climbs onto the first plate, thereby making it easy to engage the first and second interlocking portions.

[0013] In the present invention, it is preferable that each of the first notches extends from one side edge of the first plate so as to incline toward the direction in which the first score line extending from the first notch is located, and that each of the second notches extends from one side edge of the second plate so as to incline toward the direction in which the second score line extending from the second notch is located.

[0014] In this case, the first and second notches open outward at the locations where the first and second meshing portions mesh, making it easy to mesh the first and second meshing portions when the first and second plates are inserted. After this meshing, the first and second plates are slid relative to each other, causing the first and second score lines to fit into each other, stabilizing the meshing.

[0015] In the present invention, at least one of the first notch and the second notch may be a score line.

[0016] In the present invention, at least one of the first fold line and the second fold line may have a partial cut.

[0017] Further, in the present invention, for example, the packaging box has a main body having a rectangular cylindrical body portion composed of a pair of first side plates opposed to each other and a pair of second side plates opposed to each other in a direction intersecting the opposing direction of the pair of first side plates, a bottom portion closing the lower open end of the body portion, and a lid body closing the upper open end of the body portion, the main body and the lid body each being formed from a single sheet-like paper blank, and a flap connected to an upper edge of one of the pair of first side plates via a fold line, the first plate body being the flap, the second plate body being the lid body, and the first engaging portion being the flap the first notch is formed at a distance from the side edge of the flap opposite the fold line, the first fold lines extend in the same direction from each of the first notches, and the first fold lines extend from the tip of each of the first fold lines extending from the first notches to the side edge of the flap opposite the first fold line, and the second interlocking portion has a second notch formed at the distance from one side edge of the lid, second fold lines extend in the same direction from each of the second notches, and the second fold lines extend from the tip of each of the second fold lines extending from the second notches to one side edge of the lid.

[0018] In this case, the first and second interlocking portions interlock with each other to assemble the lid to the first flap of the main body, thereby obtaining a packaging box in which the lid can be opened and closed from one side. Furthermore, since the main body and the lid are formed from separate blanks, it is possible to reduce the proportion of cardboard that is discarded without being effectively used when obtaining the blanks, compared to conventional blanks in which the main body and the lid are integrated.

[0019] Further, in the present invention, for example, the packaging box has a first side plate body and a second side plate body each made of one or more side plates, with a plurality of side plates connected together via fold lines or by assembly, the first side plate body and the second side plate body each being formed from a single sheet-like paper blank, the first plate body being the first side plate body, the second plate body being the second side plate body, and the first engagement portion being formed by the first notch formed at a distance from a side edge of one side plate of the first side plate body, and the first engagement portion being formed by the first notch formed at a distance from a side edge of one side plate of the first side plate body, The second engaging portion has the first cut lines extending in the same direction from the first side plate body, and the first fold lines extending from the tip ends of each of the first cut lines extending from the first notch to the side edge of one of the side plates, and the second engaging portion has second notches formed at the distance from the side edge of one of the side plates of the second side plate body, second cut lines extending in the same direction from each of the second notches, and the second fold lines extending from the tip ends of each of the second cut lines extending from the second notches to the side edge of one of the side plates of the second side plate body.

[0020] In this case, it is possible to manufacture a packaging box, which has conventionally been formed by connecting the bodies using stitches (rivets) or the like, without using connecting tools. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a packaging box according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view of the packaging box with the lid open. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 10 is a partially enlarged view showing the state in which the lid body is being inserted into the first flip. [Figure 6] FIG. 10 is a perspective view showing a packaging box according to a second embodiment of the present invention. [Figure 7] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0022] As shown in FIGS. 1 and 2 , a packaging box 100 according to a first embodiment of the present invention comprises a rectangular tubular body 10 formed of four side panels 11-14, a main body 30 having a bottom 20 closing the lower open end of the body 10, and a lid 40 closing the upper open end of the body 10. The packaging box 100 becomes a rectangular box overall when the main body 30 and the lid 40 are assembled together. Note that, since the open ends of the body 10 are arranged vertically in the example described here, the part that closes the lower open end is referred to as the bottom 20 and the part that closes the upper open end is referred to as the lid 40, but the present invention is not limited to this. That is, when the body 10 is used upright, the bottom 20 is positioned at the back and the lid 40 is positioned at the front. In other words, the packaging box 100 can be used either lying down as in the first embodiment or upright.

[0023] The packaging box 100 is an openable / closable packaging box in which the lid 40 is attached to the main body 30, and the lid 40 can be opened and closed from one side. The main body 30 can accommodate items such as cut flowers, and the packaging box 100 is suitable for transporting cut flowers and the like.

[0024] The main body 30 is formed by assembling a single sheet-like main body blank 50 shown in Fig. 3. The lid 40 is made of a single sheet-like lid blank 60 shown in Fig. 4. Both the main body blank 50 and the lid blank 60 are made of paper such as corrugated cardboard or thick paper having a thickness of several millimeters.

[0025] The body 10 is made up of a pair of first side plates 11, 12 facing each other and a pair of second side plates 13, 14 facing each other in a direction intersecting the facing direction of the pair of first side plates 11, 12. Note that, with reference to Figure 2, in the body 10, the first side plate 11 is located on the right side, the first side plate 12 is located on the left side, the second side plate 13 is located on the front side, and the second side plate 14 is located on the back side.

[0026] In the main body blank 50, the first side panel 11 and the second side panel 13 are connected via a trunk fold line 51, the second side panel 13 and the first side panel 12 are connected via a trunk fold line 52, and the first side panel 12 and the second side panel 14 are connected via a trunk fold line 53. An adhesive piece 15 is connected to one side edge of the second side panel 14 via a fold line 54.

[0027] Outer flaps 11A, 12A are connected to the upper edges of the first side panels 11, 12 via flap fold lines 11a, 12a, respectively. A slit 16 is formed in the middle of the flap fold line 11a. The flap fold line 11a corresponds to the fold line of the present invention.

[0028] The outer flap 11A has a first interlocking portion 70 on the side edge opposite the flap fold line 11a (which becomes the leading edge located inside the trunk portion 10 when the main body blank 50 is assembled into the main body 30). The outer flap 11A corresponds to the first plate and flap of the present invention.

[0029] The first interlocking portion 70 has first notches 71, 71 formed at intervals on the tip edge portion of the outer flap 11A, first score lines 72, 72 extending in the same direction from each first notch 71, and first fold lines 73, 73 extending from the tip ends of the first score lines 72 extending from each first notch 71 to the tip edge of the outer flap 11A.

[0030] Here, there are two first notches 71, 71, and they have the same shape.

[0031] Each first notch 71 extends from the leading edge of the outer flap 11A toward the base edge (the direction of the first fold line 11a) and at a slight angle from right to left, and is rectangular, more specifically, approximately parallelogram-shaped. This approximately parallelogram has oblique sides 71a and 71b that are inclined toward the direction in which the first cut line 72 extends from the first notch 71 (a direction parallel to the first fold line 11a).

[0032] However, in this case, the hypotenuse 71b of the approximate parallelogram extending from the starting point of the first score line 72 toward the leading edge of the outer flap 11A is more inclined than the hypotenuse 71a opposite to this hypotenuse 71b, i.e., the hypotenuse 71b is inclined closer to a vertical angle toward the leading edge of the outer flap 11A, and the base 71c is parallel to the leading edge of the outer flap 11A.

[0033] Here, the first score lines 72, 72 extend parallel to the leading edge of the outer flap 11A so as to continue from the bottom side 71c of each first cutout 71. The first score lines 72, 72 also have the same length. The connecting portion between the oblique side 71a of each first cutout 71 and the first score line 72 is rounded.

[0034] The first fold lines 73, 73 are inclined in the opposite direction to the oblique side 71b. Here, the first fold line 73 and the oblique side 71b are line-symmetric, but the present invention is not limited to this.

[0035] Due to the presence of the first fold line 73, an approximately trapezoidal movable piece 74 surrounded by the first fold line 73, the first cut line 72, the oblique side 71a, and the four sides of the tip edge of the outer flap 11A can easily bend in both directions of its thickness relative to the main body of the outer flap 11A via the first fold line 73.

[0036] With the structure described above, the first interlocking portion 70 has a first central interlocking portion 75 which is an approximately trapezoidal piece sandwiched between the first fold line 73 on the front side and the oblique side 71b of the first notch 71 on the rear side, a first side interlocking portion 76 which is an approximately trapezoidal piece sandwiched between the edge of the outer flap 11A on the front side and the oblique side 71b of the first notch 71 on the front side, and a first side interlocking portion 77 which is an approximately trapezoidal piece sandwiched between the edge of the outer flap 11A on the rear side and the first fold line 73 on the rear side.

[0037] Furthermore, inner flaps 13A, 14A are connected via flap fold lines 13a, 14a to the upper edges of the second side plates 13, 14. The outer flaps 11A, 12A and the inner flaps 13A, 14A form the top portion of the main body 30, as will be described later.

[0038] Outer flaps 11B and 12B are connected to the lower edges of the first side plates 11 and 12 via flap fold lines 11b and 12b, respectively. Inner flaps 13B and 14B are connected to the lower edges of the second side plates 13 and 14 via flap fold lines 13b and 14b, respectively. The outer flaps 11B and 12B and the inner flaps 13B and 14B form the bottom portion 20 of the main body 30, as will be described later.

[0039] On the other hand, the lid blank 60 has a lid plate 41 and an insert piece 43 connected to the lid plate 41 via a fold line 42 . The cover plate 41 has a second meshing portion 80 formed on the side edge opposite to the insertion piece 43, with which the first meshing portion 70 meshes.

[0040] The second interlocking portion 80 has second notches 81, 81 formed at intervals on one side (right edge) of the cover plate 41, second cut lines 82, 82 extending in the same direction from each second notch 81, and second fold lines 83, 83 extending from the tip of the second cut lines 82 extending from each second notch 81 to the right edge of the cover plate 41.

[0041] The second notches 81, 81 are present in the same number as the first notches 71, 71 of the outer flap 11A, and in this case there are two of them, and they have the same shape.

[0042] Each second cutout 81 extends from the right edge of the cover plate 41 in the opposite direction (toward the left edge), that is, from right to left, and here has a rectangular shape, specifically a substantially parallelogram shape, similar to the first cutouts 71, 71. This substantially parallelogram has oblique sides 81a, 81b that are inclined in the direction in which the second cut line 82 extends from the second cutout 81.

[0043] However, in this case, the oblique side 81a of the approximate parallelogram extending from the starting point of the second score line 82 toward the right edge of the cover plate 41 is more inclined than the oblique side 81b opposite to this oblique side 81a, that is, it is inclined closer to vertical toward the right edge of the cover plate 41. The base side 81c is parallel to the right edge of the cover plate 41.

[0044] Here, the second score lines 82, 82 extend parallel to the right edge of the cover plate 41, continuing from the bottom side 81c of each second cutout 81. The second score lines 82, 82 also have the same length. The connecting portion between the oblique side 81a of each second cutout 81 and the second score line 82 is rounded.

[0045] The second fold lines 83, 83 are inclined in the opposite direction to the oblique side 81b. Here, the second fold line 83 and the oblique side 81b are line-symmetric, but the present invention is not limited to this.

[0046] Due to the presence of the second fold line 83, the approximately trapezoidal movable piece 84, which is surrounded by the second fold line 83, the second cut line 82, the oblique side 81a, and the four sides of the right edge of the cover plate 41, can easily bend in both directions in the thickness direction relative to the main body of the cover plate 41 via the second fold line 83.

[0047] With the structure described above, the second interlocking portion 80 has a second central interlocking portion 85 which is an approximately trapezoidal piece sandwiched between the second fold line 83 on the front side and the oblique side 81b of the second notch 81 on the rear side, a second side interlocking portion 86 which is an approximately trapezoidal piece sandwiched between the edge of the front cover plate 41 and the oblique side 81b of the second notch 81 on the front side, and a second side interlocking portion 87 which is an approximately trapezoidal piece sandwiched between the edge of the rear cover plate 41 and the second fold line 83 on the rear side.

[0048] Next, the process of assembling the main body 30 from the main body blank 50 will be described.

[0049] First, the first side panels 11, 12 and the second side panels 13, 14 are sequentially folded at right angles along the body fold lines 51-53 and fold line 54, respectively, and then adhesive piece 15 is adhered to the side edge of first side panel 11 to form body 10 as shown in Figure 3.

[0050] Next, the bottom 20 of the main body 30 is formed. Specifically, first, the inner flaps 13B, 14B are folded inward along the flap fold lines 13b, 14b so as to be perpendicular to the second side panels 13, 14, respectively. Next, the outer flaps 11B, 12B are folded inward along the flap fold lines 11b, 12b so as to be perpendicular to the first side panels 11, 12, and are overlapped on the outer surfaces of the inner flaps 13B, 14B. This forms the bottom 20, and the open lower end of the body 10 is closed.

[0051] Furthermore, the top portion of the main body 30 is formed. Specifically, first, the inner flaps 13A, 14A are folded inward along the flap fold lines 13a, 14a so as to be perpendicular to the second side plates 13, 14, respectively. Next, the outer flaps 11A, 12A are folded inward along the flap fold lines 11a, 12a so as to be perpendicular to the first side plates 11, 12, and are overlapped on the outer surfaces of the inner flaps 13A, 14A.

[0052] This forms the top of the main body 30, and partially closes the open upper end of the trunk 10. The presence of the outer flap 12A and the inner flaps 13A and 14A makes it possible to prevent the lid 40, which is attached to the outer flap 11A as described below, from dropping off the top of the trunk 10.

[0053] Next, the operation of assembling the cover 40 to the main body 30 assembled as described above will be described.

[0054] First, the outer flap 11A of the main body 30 is set upright or tilted upward, and the first interlocking portion 70 of the outer flap 11A and the second interlocking portion 80 of the cover plate 41 are interlocked.

[0055] Specifically, the left edge portion of the outer flap 11A of the main body 30 where the first interlocking portion 70 is formed is inserted into the right edge portion of the cover plate 41 where the second interlocking portion 80 is formed, so that the first notch 71 and the second notch 81 overlap, and then inserted toward the portion where the flap fold line 11a is formed (from left to right).

[0056] At this time, the first central interlocking portion 75 of the outer flap 11A is on the upper side and the second central interlocking portion 85 of the cover plate 41 is on the lower side, so that these central interlocking portions 75, 85 abut against each other in a planar manner, and the two first side interlocking portions 76, 77 of the outer flap 11A are on the lower side and the two second side interlocking portions 86, 87 of the cover plate 41 are on the upper side, so that these two side interlocking portions 76, 77, 86, 87 abut against each other in a planar manner.

[0057] Alternatively, conversely, the first central interlocking portion 75 of the outer flap 11A is on the lower side and the second central interlocking portion 85 of the cover plate 41 is on the upper side, so that these central interlocking portions 75, 85 abut against each other in a planar manner, and the two first side interlocking portions 76, 77 of the outer flap 11A are on the upper side and the two second side interlocking portions 86, 87 of the cover plate 41 are on the lower side, so that these two side interlocking portions 76, 77, 86, 87 abut against each other in a planar manner.

[0058] At this time, the first notch 71 and the second notch 81 are open so as to widen outward, making it easy to insert them as described above.

[0059] In the above state, the edge of the outer flap 11A and the edge of the cover plate 41 do not yet coincide with each other, and the front edge of the cover plate 41 protrudes from the outer flap 11A toward the front.

[0060] Therefore, in this case, while maintaining the ends of the portions where the first notch 71 and the second notch 81 are formed abutting against each other, the cover plate 41 is moved parallel to the rear side relative to the outer flap 11A, causing the first cut line 72 and the second cut line 82 to interlock with each other. As a result, the front and rear ends of the cover plate 41 are aligned or nearly aligned with the front and rear ends of the outer flap 11A. In this way, the first interlocking portion 70 of the outer flap 11A and the second interlocking portion 80 of the cover plate 41 are firmly interlocked, and the cover body 40 is stably attached to the main body 30.

[0061] At this time, the movable piece 74 easily climbs up onto the cover plate 41, and the movable piece 84 easily climbs up onto the first flap 11A. This facilitates the engagement of the first interlocking portion 70 with the second interlocking portion 80. Note that the tip of the first cut line 72 formed on the outer flap 11A and the tip of the second cut line 82 formed on the cover plate 41 may be in contact with each other or may be separated from each other.

[0062] Then, after storing cut flowers or other items inside the main body 30 as needed, the insertion piece 43 of the lid 40 is inserted into the slit 16 of the main body 30. This closes the upper open end of the main body 30 with the lid 40. This completes the packaging box 100.

[0063] According to the packaging box 100 of this embodiment described above, the lid body 40 can be assembled to the first flap 11A of the main body 30 by engaging the first interlocking portion 70 and the second interlocking portion 80, so that the packaging box 100 can be obtained with a simple operation in which the lid body 40 can be opened and closed from one side.

[0064] Furthermore, since the main body 30 and the lid body 40 are formed from separate blanks 50, 60, it is possible to reduce the proportion of cardboard paper that is discarded without being effectively used when obtaining the blanks 50, 60, compared to conventional blanks in which the main body and the lid body are integrated.

[0065] In addition, for example, if the type of contents (such as cut flowers, gypsophila, carnations, etc.) is written on the lid 40, it is possible to standardize the main body 30 to be assembled even if the lid 40 has different writing. This makes it possible to facilitate material management of the packaging box 100 and reduce material costs.

[0066] Furthermore, by separating the lid 40 from the main body 30, the contents contained in the main body 30 can be easily displayed.

[0067] Furthermore, by engaging the central engaging portions 75, 85 and the side engaging portions 76, 86 so that they are in planar contact with each other and are positioned alternately, the cover 40 can be stably assembled to the main body 30.

[0068] This assembly can be easily performed by a single worker without the need for a connecting agent or connecting machine, and it also reduces the cost of the paperboard compared to connecting using flips.

[0069] Furthermore, since the first score line 72 and the second score line 82 interlock with each other, the engagement between the lid body 40 and the main body 30 will not be released unless the lid body 40 is slid relative to the main body so that the first score line 72 and the second score line 82 move apart, and the assembly is stable.

[0070] As described above, packaging boxes whose bodies have conventionally been formed using fasteners such as stitches (rivets) can now be manufactured without using fasteners.

[0071] Next, as shown in Fig. 6, a packaging box 200 according to a second embodiment of the present invention is configured with a main body 110 having a rectangular cylindrical body portion made up of four side panels 111 to 114. The packaging box 200 is preferably used, for example, when packaging a heavy rectangular cylindrical object by enclosing it around the periphery. The packaging box 200 is also preferably used when packaging a thick plate-like object such as a partition door for use in emergencies.

[0072] 7, the packaging box 200 is formed by assembling a first side panel blank 121 formed by two side panels 111, 112 connected via a body fold line 115, and a second side panel blank 122 formed by two side panels 113, 114 connected via a body fold line 116. Both of these side panel blanks 121, 122 are made of paper such as corrugated cardboard or thick paper having a thickness of several millimeters. The side panel blanks 121, 122 have the same shape.

[0073] In the first side panel blank 121, a flap 111A is connected to the side edge of the side panel 111 via a flap fold line 111a, and a flap 112A is connected to the side edge of the side panel 112 via a flap fold line 112a. In the second side panel blank 122, a flap 113A is connected to the side edge of the side panel 113 via a flap fold line 113a, and a flap 114A is connected to the side edge of the side panel 114 via a flap fold line 114a.

[0074] The side edge of flap 111A is provided with the first interlocking portion 70 described above, and the side edge of flap 112A is provided with the second interlocking portion 80 described above. The side edge of flap 113A is provided with the first interlocking portion 70 described above, and the side edge of flap 114A is provided with the second interlocking portion 80 described above. The flaps 111A and 113A correspond to the first plate body of the present invention, and the flaps 112A and 114A correspond to the second plate body of the present invention.

[0075] Next, the operation of assembling the packaging box 200 from the two side plate blanks 121 and 122 will be described.

[0076] First, for example, the first meshing portion 70 of the first side plate blank 121 and the second meshing portion 80 of the second side plate blank 122 are meshed together. As a result, the first side plate blank 121 and the second side plate blank 122 are connected together via the meshing portions 70, 80, so that the side plate 111 and the side plate 114 are connected together.

[0077] Thereafter, the side plates 111, 112 and the side plates 113, 114 are sequentially folded at right angles along the body fold lines 115, 116, respectively, and then the second interlocking portion 80 of the first side plate blank 121 is interlocked with the first interlocking portion 70 of the second side plate blank 122. The side plates 112 and 113 are connected together via the interlocking portions 70, 80, and the packaging box 200 is completed.

[0078] According to the packaging box 200 of this embodiment described above, the first side panel blank 121 and the second side panel blank are assembled by interlocking the first interlocking portion 70 and the second interlocking portion 80, thereby achieving the same effects as the packaging box 100 described above.

[0079] Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, the packaging boxes 100 and 200 have been described as examples, but the packaging box of the present invention is not limited thereto. The packaging box of the present invention is a packaging box formed by combining a first plate and a second plate, each formed from a single sheet-like paper blank, as long as the first plate has a first interlocking portion 70 and the second plate has a second interlocking portion 80.

[0080] Furthermore, the first interlocking portion 70 and the second interlocking portion 80 are not limited to those described above. For example, the first notches 71 extend from the left edge of the outer flap 11A so as to be inclined toward the direction in which the first cut line 72 extending from the first notch 71 is located, and the second notches 81 extend from the right edge of the cover plate 41 so as to be inclined toward the direction in which the second cut line 82 extending from the second notch 81 is located.

[0081] In this case, the first notch 71 and the second notch 81 open outward at the location where the cover plate 41 is inserted into the outer flip 11A, which is preferable because it makes it easier to engage the first interlocking portion 70 and the second interlocking portion 80 during this insertion. However, the inclination of the first notch 71 and the second notch 81 is not limited to this, and they may be inclined in opposite directions or extend vertically.

[0082] Furthermore, the first notch 71 and the second notch 81 have been described as having a substantially parallelogram shape. However, the shapes of the first notch 71 and the second notch 81 are not limited to this and may be rectangular, trapezoidal, or the like, and the inclination angles of the oblique sides 71a, 71b, 81a, 81b may be significantly different. Furthermore, the first notch 71 and the second notch 81 have been described as having the same shape, but they may also be different shapes.

[0083] Furthermore, although the first notch 71 and the second notch 81 have been described as having a width in the direction in which the side edge extends, they may not have a width in this direction, i.e., they may be linear notches, or they may be notches with a small width.

[0084] Furthermore, at least one of the first fold line 73 and the second fold line 83 may have a partial cut. This makes it possible to move the movable pieces 74, 84 along these fold lines 73, 83 even more easily.

[0085] Furthermore, the case has been described in which the first score lines 72 are both parallel to the side edges of the outer flaps 11A, etc., and the second score lines 82 are both parallel to the side edges of the cover plate 41. However, as long as the first score lines 72 and the second score lines 82 are parallel to each other, they do not have to be parallel to the side edges of the outer flaps 11A, the cover plate 41, etc.

[0086] Furthermore, the case has been described in which the outer flap 11A or the like is provided with two sets of first cutouts 71, first score lines 72, and first fold lines 73 as the first interlocking portions 70, and the cover plate 41 or the like is provided with two sets of second cutouts 81, second score lines 82, and second fold lines 83 as the second interlocking portions 80. However, the outer flap 11A, the cover plate 41, or the like may be provided with three or more sets of the above combinations. [Explanation of symbols]

[0087] 10...body, 11,12...first side panel, 11A...outer flap (first plate, flap), 11a...flap fold line (fold line), 12A...outer flap (flap), 12a...flap fold line, 11B,12B...outer flaps, 11b,12b...flap fold line, 13,14...second side panel, 13A,14A...inner flaps, 13a,14a...flap fold line, 13B,13B...inner flaps, 13b,14b...flap fold line, 15...adhesive strip, 16...slit, 20...bottom, 30...main body, 40...lid, 41...lid plate (second plate), 42...fold, 43...insertion strip, 50...Main body blank (blank forming the main body 30), 51-53...Body fold line, 54...Fold line, 60...Lid body blank (blank forming the lid body 40), 70...First interlocking portion, 71...First notch, 71a, 71b...Hypogonal side, 71c...Bottom side, 72...First cut line, 73...First fold line, 74...Movable piece, 75...First central interlocking portion, 76, 77...First side interlocking portion, 80...Second interlocking portion, 81...Second notch, 81a, 81b...Hypogonal side, 81c...Bottom side, 82...Second cut line, 83...Second fold line, 84...Movable piece, 100...Packaging box, 110...Main body, 111-114...Side panel, 111A, 113A...flaps (first plate body), 112A, 114A...flaps (second plate body), 111a to 114a...flap fold lines, flaps 115, 116...body fold lines, 121...first side plate blank, 122...second side plate blank, 200...packaging box.

Claims

1. A packaging box comprising a first plate and a second plate, each of which is formed from a single sheet-like paper blank, The first plate has a first meshing portion, and the second plate has a second meshing portion, the first interlocking portion has a plurality of first notches formed at intervals on one side edge of the first plate body, first score lines extending in the same direction from each of the first notches, and first fold lines extending from the tip ends of each of the first score lines extending from the first notches to the one side edge of the first plate body, the second interlocking portion has a plurality of second notches formed at the intervals on one side edge of the second plate body, second score lines extending from each of the second notches in the same direction as the direction, and second fold lines extending from the tip ends of the second score lines extending from the second notches to the one side edge of the second plate body, Each of the first notches extends from the one side edge of the first plate so as to be inclined toward a direction in which the first score line extending from the first notch is located, A packaging box characterized in that each of the second notches extends from one side edge of the second plate so as to be inclined toward the direction in which the second score line extending from the second notch is located.

2. A packaging box comprising a first plate and a second plate, each of which is formed from a single sheet-like paper blank, The first plate has a first meshing portion, and the second plate has a second meshing portion, the first interlocking portion has a plurality of first notches formed at intervals on one side edge of the first plate body, first score lines extending in the same direction from each of the first notches, and first fold lines extending from the tip ends of each of the first score lines extending from the first notches to the one side edge of the first plate body, the second interlocking portion has a plurality of second notches formed at the intervals on one side edge of the second plate body, second score lines extending from each of the second notches in the same direction as the direction, and second fold lines extending from the tip ends of the second score lines extending from the second notches to the one side edge of the second plate body, A packaging box, wherein at least one of the first notch and the second notch is a score line.

3. A packaging box comprising a first plate and a second plate, each of which is formed from a single sheet-like paper blank, The first plate has a first meshing portion, and the second plate has a second meshing portion, the first interlocking portion has a plurality of first notches formed at intervals on one side edge of the first plate body, first score lines extending in the same direction from each of the first notches, and first fold lines extending from the tip ends of each of the first score lines extending from the first notches to the one side edge of the first plate body, the second interlocking portion has a plurality of second notches formed at the intervals on one side edge of the second plate body, second score lines extending from each of the second notches in the same direction as the direction, and second fold lines extending from the tip ends of the second score lines extending from the second notches to the one side edge of the second plate body, The packaging box has a main body having a rectangular cylindrical body portion composed of a pair of first side plates opposed to each other and a pair of second side plates opposed to each other in a direction intersecting the opposing direction of the pair of first side plates, a bottom portion closing the lower open end of the body portion, and a lid body closing the upper open end of the body portion, the main body and the lid body each being formed from a single sheet-like paper blank, a flap connected to an upper edge of one of the pair of first side plates via a fold line; the first plate is the flap, and the second plate is the lid, the first engagement portion has the plurality of first notches formed at the intervals on a side edge of the flap on the opposite side from the fold line, the first score lines extending in the same direction from each of the first notches, and the first fold lines extending from a tip end of each of the first score lines extending from the first notch to the side edge of the flap on the opposite side from the fold line, The packaging box is characterized in that the second interlocking portion has the plurality of second notches formed at the intervals on one side edge of the lid body, second score lines extending in the same direction from each of the second notches, and second fold lines extending from the tip ends of each of the second score lines extending from the second notches to one side edge of the lid body.

4. The packaging box has a plurality of side plates connected together via fold lines or by assembly, and includes a first side plate body and a second side plate body each consisting of one or more side plates, and the first side plate body and the second side plate body are each formed from a single sheet-like paper blank, the first plate is the first side plate, and the second plate is the second side plate; the first interlocking portion has the first notches formed at intervals on a side edge of one of the side plates of the first side plate body, the first score lines extending in the same direction from each of the first notches, and the first fold lines extending from a tip end of each of the first score lines extending from the first notch to a side edge of the one of the side plates, 3. The packaging box according to claim 1, wherein the second interlocking portion includes second notches formed at the intervals on the side edge of one of the side panels of the second side panel body, second score lines extending in the same direction from each of the second notches, and second fold lines extending from the tip ends of the second score lines extending from the second notches to the side edge of one of the side panels of the second side panel body.

Images