JPWO2018235789A1 - Packaging box - Google Patents

Abstract

The packaging box (10) is provided on the first side plate (13A, 13B), the second side plate (14A, 14B) connected to the first side plate (13A, 13B), and the first side plate (13A, 13B). The first operating part (30), the first breaking part (35) provided on the first side plates (13A, 13B), and the second breaking part (42) provided on the second side plates (14A, 14B). ) And a notch (44) provided on the first side (16) of the first side plate (13A, 13B). The end (35b) of the first breaking portion (35) and the end (42b) of the second breaking portion (42) are positioned with a predetermined first distance (A). The end (35b) of the first break portion (35) and the cutout portion (44) are located with a second gap (B) smaller than the first gap (A). The end (42b) of the second break portion (42) and the cutout portion (44) are positioned with a third gap (C) smaller than the first gap (A).

Description

  The present invention relates to a packaging box.

  Patent Document 1 discloses a wrap-around type packaging box including an outer peripheral portion configured by a bottom plate, a pair of side plates, and a top plate, and a lid portion configured by a pair of inner flaps and a pair of outer flaps. Has been done. The side plate is provided with an operating portion and a break line extending from the operating portion to a fold line between the side plate and the inner flap. In addition, a cut line is provided on the fold line between the side plate and the inner flap from the break line to the top plate.

  In the packaging box of Patent Document 1, the side plate is broken along the breaking line and the score line by operating the operating portion. After that, by operating the upper outer flap continuous to the top plate, the upper outer flap is peeled from the inner flap. As a result, the top plate side can be separated in the expanded state, and the bottom plate side can be opened in a tray shape.

JP2012-91799A

  In the packaging box of Patent Document 1, the break line for breaking the side plate and the cut line for breaking between the side plate and the inner flap are continuous, so that the continuous portion (between the side plate and the inner flap) Strength of the ridge) decreases. Therefore, if the packaging box is dropped or another article collides during transportation, the ridge portion is easily crushed. In addition, the ridges may be crushed even when the packaging boxes are stacked.

  An object of the present invention is to provide a packaging box capable of suppressing a decrease in rigidity due to a breaking portion for opening.

  A first aspect of the present invention has a first side, a first side plate having a second side that intersects the first side, and a third side that intersects the first side and the second side, and A second side plate connected to the first side and bent with respect to the first side plate; a first operation section provided on the first side plate and operated toward the second side; A first breaking portion provided on a side plate, extending along the second side from the first operating portion side toward the first side, and for breaking the first side plate by operating the first operating portion; A second breaking portion provided on the second side plate and extending along the third side for breaking the second side plate, and a notch provided on the first side of the first side plate. And an end on the side of the first side of the first break portion and an end on the side of the first side of the second break portion in a direction in which the first side of the first side plate extends. The first break portion and the notch portion are spaced apart from each other and are spaced apart from each other by a predetermined first gap, and the end portion and the cutout portion are spaced apart from each other by a second gap that is smaller than the first gap. Providing a packaging box, wherein the end of the second break and the notch are located at a third distance that is less than the first distance.

  In this packaging box, the first side plate is broken along the first breaking portion by performing the operation while holding the first operating portion. The break of the first side plate is stopped by reaching the cut portion because the end of the first break portion is closer to the cut portion than the end of the second break portion. When the operation of the first operating portion is continued, the gap between the first side plate and the second side plate is broken along the first side (ridge) from the cut portion as a starting point. After that, the packaging box is opened by breaking the second side plate along the second breaking portion.

  As described above, according to this packaging box, the intended opening mode can be realized by setting the formation positions of the first break portion, the second break portion, and the cut portion. Further, the first fractured portion and the second fractured portion are in a discontinuous state, and the cut portion and the first fractured portion, and the cutout portion and the second fractured portion are also in a discontinuous state. Therefore, the impact resistance can be improved as compared with the conventional packaging box in which the break line and the cut line are continuous. That is, the strength of the ridge portion where the notch is formed does not excessively decrease, and it is possible to prevent the rigidity of the packaging box from decreasing. As a result, the ridge portion is not crushed even if it is dropped from the packaging box or collided with another article during transportation. Further, even when the packaging boxes are stacked, the ridges are not crushed. Moreover, the end on the first side of the first break portion and the end on the first side of the second break portion are positioned with a gap in the direction in which the first side extends, and the first break portion and the second break portion Is formed not in a straight line but in a stepped manner, so that it is possible to minimize the decrease in the rigidity of the packaging box due to the provision of the first fractured portion and the second fractured portion.

  The first side plates are arranged in a pair so as to face each other, the second side plates are arranged in a pair so as to face both ends of the first side plate, and the second side plate of the first side plate and the second side plate are arranged. Of the first side plate, a side of the first side plate facing the second side, and a side of the second side plate facing the third side of the first continuous plate. And a second continuous plate provided, wherein the first side plate and the second side plate are broken along the first broken portion and the second broken portion, and the first portion is formed with the cut portion as a starting point. By breaking the space between the first side plate and the second side plate along the side, it is divided into the first continuous plate side and the second continuous plate side. According to this aspect, it is possible to surely perform the intended unsealing in which the second continuous plate side is formed into a tray shape and the first continuous plate side is disassembled in the expanded state. In this opened state, the removed first continuous plate side is disassembled in the expanded state, so that the convenience at the time of disposal can be improved.

  At least a part of the cutout portion projects toward the second side of the first side plate more than the first fractured portion and the second fractured portion. According to this aspect, breakage of the first side plate or the second side plate along the first breakage portion or the second breakage portion can be reliably stopped by the notch.

  The second side plate is provided with a second operating portion that is operated toward the third side of the second side plate, and the second breakage portion is from the second operating portion side to the first side. It is provided for. According to this aspect, since the second side plate can be broken along the second breaking portion by operating the second operating portion, it is possible to improve the opening workability.

  An end of the cut portion located on the side of the second side of the first side plate is located at a predetermined distance from the second side of the first side plate. In addition, an end of the cut portion located on the opposite side of the first side plate facing the second side is located at a predetermined distance from the opposite side of the first side plate. . According to these aspects, it is possible to minimize the decrease in rigidity of the packaging box due to the provision of the cut portion.

  A second aspect of the present invention has an inner flap and a second side that intersects a first side of the inner flap, is fixed to an outer surface of the inner flap, and is unsealed toward the second side. 1 outer flap, a third side that intersects the first side of the inner flap and the second side of the first outer flap, and is connected to the first side of the inner flap, and the inner flap A side plate that is bent with respect to the inner flap, and the inner flap is provided along the second side of the first outer flap from the tip side facing the first side of the inner flap toward the first side. A first breaking portion that extends and breaks the inner flap by operating the first outer flap; and a second breaking portion that is provided on the side plate, extends along the third side, and breaks the side plate. And a notch provided on the first side of the inner flap. The first side edge of the first fractured portion and the first side edge of the second fractured portion are spaced in the direction in which the first side of the first side plate extends. Positioned and positioned with a predetermined first spacing, the end of the first break and the notch are positioned with a second spacing smaller than the first spacing, The packaging box is provided in which the end of the second breakage portion and the cutout portion are positioned with a third gap smaller than the first gap.

  In this packaging box, the inner flap is fractured along the first fractured portion by performing the operation with the first outer flap. The break of the inner flap is stopped by reaching the cut portion because the end of the first break portion is closer to the cut portion than the end of the second break portion. When the operation of the first outer flap is continued, the gap between the inner flap and the side plate is broken along the first side (ridge portion) starting from the cut portion. After that, the packaging box is opened by breaking the side plate along the second breaking portion. Then, in the packaging box of the second aspect, the same effect as that of the packaging box of the first aspect can be obtained.

  A pair of the inner flaps arranged to face each other, the first outer flap fixed to the inner flap, and the first outer flap arranged side by side along the first side of the inner flap and fixed to the inner flap. And a pair of lids disposed opposite to both ends of a pair of the side plates that are disposed to face each other, and a second outer flap that is provided, and the first outer flap and the side plate are connected to each other. It further comprises a first continuous plate, a second continuous plate connected to the second outer flap and the side plate, respectively, and the inner flap and the side plate along the first broken portion and the second broken portion. By breaking the inner flap and the side plate along the first side with the notch as a starting point, thereby dividing into the first continuous plate side and the second continuous plate side. . According to this aspect, it is possible to surely perform the intended unsealing in which the second continuous plate side is formed into a tray shape and the first continuous plate side is disassembled in the expanded state. In this opened state, the removed first continuous plate side is disassembled in the expanded state, so that the convenience at the time of disposal can be improved.

  In the packaging box of the present invention, the first break portion and the second break portion are in a discontinuous state, and the cut portion and the first break portion, and the cut portion and the second break portion are also in a discontinuous state, Impact resistance can be improved as compared to a conventional packaging box in which break lines and cut lines are continuous. Therefore, since it is possible to prevent the strength of the ridge portion having the cut portion from being excessively reduced, it is possible to prevent the rigidity of the packaging box from being lowered, and it is possible to reliably prevent the ridge portion having the cut portion from being crushed. Moreover, since the first breaking portion and the second breaking portion are formed not in a straight line but in steps, it is possible to minimize the decrease in rigidity of the packaging box due to the provision of the first breaking portion and the second breaking portion. .

The perspective view of the packaging box of 1st Embodiment. The top view which shows the blank of the packaging box of FIG. FIG. 3 is a partially enlarged view of FIG. 2. The perspective view which shows one process of the opening operation. The perspective view which shows another one process of the opening operation. The perspective view which shows the opened state of the packaging box of FIG. The perspective view of the packaging box of 2nd Embodiment. Sectional drawing of FIG. The top view which shows the blank of the packaging box of FIG. The elements on larger scale of FIG. The perspective view which shows one process of the opening operation. The perspective view which shows the opened state of the packaging box of FIG. The partially expanded view of the blank of the modification of a packaging box. The partially expanded view of the blank of the other modification of a packaging box. The partially expanded view of the blank of the other modification of a packaging box. The partially expanded view of the blank of the other modification of a packaging box. The partially expanded view of the blank of the other modification of a packaging box. The partially expanded view of the blank of the other modification of a packaging box. The partially expanded view of the blank of the other modification of a packaging box. The perspective view which shows the modification of the packaging box of 1st Embodiment. The perspective view which shows the modification of the packaging box of 2nd Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1 to 6 show a packaging box 10 according to the first embodiment of the present invention. As shown in FIG. 1, this packaging box 10 has a rectangular tube-shaped outer peripheral portion 12, a lower lid portion (second continuous plate) 18 that closes a lower end opening of the outer peripheral portion 12, and an upper end opening of the outer peripheral portion 12. It is a general-purpose case including an upper lid part (first continuous plate) 24. The outer peripheral portion 12 is provided with breaking portions 35 and 42 for opening and a notch portion 44. In the present embodiment, by providing the breakage portions 35 and 42 and the cut portion 44, it is possible to achieve both the intended opening of the packaging box 10 and the suppression of the reduction in rigidity of the packaging box 10.

(Outline of packaging box)
The packaging box 10 is formed by bending and fixing one blank shown in FIG. 2 at a predetermined portion. The blank is formed by punching out a paper corrugated board sheet by a well-known paper punching device. The corrugated cardboard sheet has a corrugated center lining disposed between the front liner and the back liner. The alternate long and short dash line in FIG. 2 is a general-purpose ruled line formed by scoring the back liner so as to compress the wall thickness. A solid line in FIG. 2 is a cutting line formed by inserting a blade from the back liner to the front liner, and a shape line (side) by punching. In addition, a two-dot chain line in FIG. 9 described later is an inverted ruled line formed by forming a rule from the front liner so as to compress the wall thickness.

  In the following description, the longitudinal direction of the packaging box 10 is called the X direction, the lateral direction of the packaging box 10 is called the Y direction, and the height direction of the packaging box 10 is called the Z direction. However, depending on the packaging box 10, the X direction and the Y direction may be formed to have the same dimensions, and such an aspect is also included in the present invention.

  As shown in FIG. 1, the packaging box 10 includes a pair of end plates (first side plates) 13A and 13B and a pair of side plates (second side plates) 14A and 14B. The end plates 13A and 13B have substantially the same quadrangular shape extending along the YZ plane, and are arranged facing each other at both ends of the side plates 14A and 14B at intervals in the X direction. The side plates 14A and 14B have substantially the same quadrangular shape extending along the ZX plane, and are arranged facing each other at both ends of the end plates 13A and 13B at intervals in the Y direction.

  Referring to FIG. 2, the side plate 14A, the end plate 13A, the side plate 14B, and the end plate 13B are consecutively arranged in this order from the left side through a folding line 16 made of a general ruled line. In FIG. 2, a sticking plate 15 for sticking to the end plate 13B located at the right end is connected to the side plate 14A located at the left end via a folding curve 16. The part where the folding curve 16 is formed is the first side of the end plates 13A and 13B.

  As shown in FIG. 6, the lower lid portion (second continuous plate) 18 includes a pair of inner flaps 19A and 19B and a pair of outer flaps 21A and 21B. Referring to FIG. 2 together, the inner flaps 19A and 19B have substantially the same quadrangular shape, and the lower side of the end plates 13A and 13B (the side facing the second side) via the folding line 20 that is a general ruled line. Have been serialized. The outer flaps 21A and 21B have substantially the same quadrangular shape, and are continuously provided on the lower side (side facing the third side) of the side plates 14A and 14B via a folding line 22 formed by a general ruled line.

  As shown in FIG. 1, the upper lid portion (first continuous plate) 24 includes a pair of inner flaps 25A and 25B and a pair of outer flaps 27A and 27B. Referring also to FIG. 2, the inner flaps 25A and 25B have substantially the same quadrangular shape, and are continuously provided on the upper side (second side) of the end plates 13A and 13B via a folding curve 26 that is a general ruled line. ing. The outer flaps 27A and 27B have substantially the same quadrangular shape, and are connected to the upper side (third side) of the side plates 14A and 14B via a folding line 28 formed by a general ruled line.

  In the packaging box 10, the side plate 14A is bent 180 degrees with respect to the end plate 13A, the end plate 13B is bent 180 degrees with respect to the side plate 14B, and the overlapping sticking plate 15 and end plate 13B are made of vinyl acetate emulsion, for example. It is shipped in the state of being fixed by an adhesive.

  When the packaging box 10 is used, the end plate 13A, the side plate 14A, the end plate 13B, and the side plate 14B are bent along the folding curve 16 so that the outer peripheral portion 12 has a square tubular shape.

  Next, after bending the inner flaps 19A, 19B to the end plates 13A, 13B in the same direction as the side plates 14A, 14B, the outer flaps 21A, 21B are oriented to the side plates 14A, 14B in the same direction as the end plates 13A, 13B. Bend it in (see Figure 6). Then, the overlapped portions are fixed with an adhesive, or the tips of the outer flaps 21A and 21B are fixed with an adhesive tape to close the lower end opening of the outer peripheral portion 12. In this state, the article is housed inside the packaging box 10.

  After accommodating the articles, the inner flaps 25A and 25B are bent to the end plates 13A and 13B in the same direction as the side plates 14A and 14B, and then the outer flaps 27A and 27B are respectively attached to the end plates 13A and 13B to the side plates 14A and 14B. Fold in the same direction. Then, similarly to the lower lid portion 18, the upper end opening of the outer peripheral portion 12 is closed by the upper lid portion 24.

(Structure of the breaking part for opening)
As shown in FIGS. 1 and 6, the packaging box 10 includes a first operating portion 30, a first breaking portion 35, and a second operating portion 37 in order to divide the packaging box 10 into an upper lid portion 24 side and a lower lid portion 18 side. , And the second breaking portion 42 are provided. Further, the packaging box 10 is provided with a notch portion 44 for disassembling the upper lid portion 24 side to the developed state at the same time when the upper lid portion 24 side and the lower lid portion 18 side are divided. The first operating portion 30 and the first breaking portion 35 are formed on the end plates 13A and 13B, respectively, and the second operating portion 37 and the second breaking portion 42 are formed on the side plates 14A and 14B, respectively. The notch 44 is formed on the folding line 16 between the end plates 13A and 13B and the side plates 14A and 14B, respectively.

  As shown in FIG. 1 and FIG. 2, the first operating portion 30 is composed of a folding line 31, a pair of first break lines 32, 32, and a second break line 33, and inner flaps 25A, 25B are arranged continuously. It is operated toward the folding curve (second side) 26. The folding line 31 is a general ruled line and extends in the Y direction along the folding line 26. The first break line 32 is composed of two or more cut lines, and extends from both ends of the folding curve 31 in an arc shape in the Y direction. The second break line 33 is composed of two or more cut lines, and extends from one of the outer ends of the pair of first break lines 32, 32 in the Y direction in an arc shape. In the present embodiment, the first operating portion 30 of the end plate 13A is provided at a position biased toward the side plate 14A, and the first operating portion 30 of the end plate 13B is provided at a position biased toward the side plate 14B. .

  The first breaking portion 35 is provided to break the end plates 13A and 13B by operating the first operating portion 30. The first breaking portion 35 is composed of a plurality of cutting lines provided at predetermined intervals, and is provided on both sides of the first operating portion 30 in the Y direction. The first breaking portion 35 extends from the first operating portion 30 toward the folding line 16 along the folding line 26. The first breakage portion 35 is also formed on the adhesive plate 15 integrated with the inner surface of the end plate 13B. Although the first fractured portion 35 is formed in a linear shape as a whole, it may be formed in an arc shape or a wave shape, and its shape can be changed as necessary.

  The second operating portion 37 is composed of a folding line 38, a pair of first breaking lines 39, 39, and a second breaking line 40, and is arranged on the folding line (third side) 28 in which the outer flaps 27A, 27B are continuously provided. It is operated toward. The fold line 38 is a general ruled line and extends in the X direction along the fold line 28. The first break line 39 is composed of two or more cut lines, and extends from both ends of the folding line 38 in an arc shape in the X direction. The second breaking line 40 is composed of two or more cutting lines, and extends in an arc shape from one of the outer ends of the pair of first breaking lines 39, 39 in the X direction to the other. The second operating portion 37 is provided at the center of the side plates 14A and 14B in the X direction. Further, the second operating portion 37 is arranged on the lower lid portion 18 side (opposite to the operating direction) with respect to the first operating portion 30.

  The second breaking portion 42 is provided to break the side plates 14A and 14B by operating the second operating portion 37. The second breaking portion 42 is composed of a plurality of cutting lines provided at predetermined intervals, and is provided on both sides of the second operating portion 37 in the X direction. The second breaking portion 42 extends from the second operating portion 37 toward the folding line 16 along the folding line 28. The second breaking portion 42 is arranged closer to the lower lid portion 18 than the first breaking portion 35 (opposite to the operating direction). That is, the first break portion 35 and the second break portion 42 are provided at intervals in the Z direction in which the folding line 16 extends. As a result, the end 35b of the first breaking portion 35 on the folding curve 16 side and the end 35b of the second breaking portion 42 on the folding curve 16 side are located at intervals in the Z direction in which the folding curve 16 extends. The second breaking portion 42 is formed in a linear shape as a whole, but may be formed in an arc shape or a wave shape (see FIG. 15), and its shape is changed as necessary. Is possible.

  The notch 44 is formed by a cutting line that extends along the folding line 16, and is formed between the first break portion 35 and the second break portion 42. Referring to FIG. 3, the end 44a of the cutout portion 44 located on the upper lid portion 24 side (the front side in the operating direction) is located above the first breaking portion 35 located on the upper lid portion 24 side. That is, the upper portion of the cut portion 44 projects toward the upper lid portion 24 side more than the first break portion 35 and the second break portion 42. The end 44b of the notch 44 located on the side of the lower lid 18 (opposite to the operating direction) is located between the first break portion 35 and the second break portion 42 in the Z direction.

(Details of the breaking part for opening)
As shown in FIGS. 1 and 2, the end 35 a of the first breaking portion 35 on the first operating portion 30 side is located at the intersection of the first breaking line 32 and the second breaking line 33 of the first operating portion 30. There is. The end 42a of the second breaking portion 42 on the second operating portion 37 side is located at the intersection of the first breaking line 39 and the second breaking line 40 of the second operating portion 37. However, these ends 35a, 42a may be arranged at intervals so long as the breakage of the outer peripheral portion 12 along the breakage parts 35, 42 can be realized by the operation of the operation parts 30, 37.

  As shown in FIG. 3, the end 35b of the first breaking portion 35 on the side of the folding curve 16 and the end 42b of the second breaking portion 42 on the side of the folding curve 16 are positioned at a predetermined first distance A. Has been done. The first distance A is set based on the straight line distance (creeping distance) between the end 35b of the first breaking portion 35 and the end 42b of the second breaking portion 42 in the blank state.

  The end 35b of the first breakage portion 35 and the cutout portion 44 are positioned with a predetermined second distance B therebetween. Further, the end 42b of the second breakage portion 42 and the notch portion 44 are positioned with a predetermined third distance C therebetween. The second distance B and the third distance C are set based on the shortest creeping distance from the ends 35b, 42b to the cut portion 44. That is, the second interval B of the present embodiment corresponds to the dimension of the extension line of the first breaking portion 35 that is orthogonal to the cut portion 44 from the end 35b of the first breaking portion 35. The third distance C corresponds to the distance from the end 42b of the second break portion 42 to the end 44b of the cut portion 44.

  The second distance B is set smaller than the first distance A (A> B), and the third distance C is set smaller than the first distance A (A> C). As a result, the breakage of the end plates 13A, 13B along the first break portion 35 stops at the notch 44 located nearby, and the side plates 14A, 14B are subsequently broken along the second break portion 42. To prevent that. Further, the breakage of the side plates 14A, 14B along the second break part 42 is stopped at the notch 44 located nearby, and the end plates 13A, 13B are subsequently broken along the first break part 35. Is being prevented.

  The second interval B and the third interval C are set as follows. If the second distance B and the third distance C are set too small, the strength of the ridge portion between the end plates 13A, 13B and the side plates 14A, 14B is reduced, which is not preferable. Further, when the second distance B and the third distance C are set excessively large, breakage of the outer peripheral portion 12 along the breakage portions 35 and 42 is an unintended portion other than the cut portion 44 from the ends 35b and 42b. Is not preferable because it proceeds to. Therefore, in order to prevent the outer peripheral portion 12 from breaking at the cut portion 44 while suppressing the strength reduction of the ridge portion, the second distance B and the third distance C are set to 0.5 mm or more and 20 mm or less. There is.

  Further, the total length L1 of the cut portion 44 is set as follows. If the total length L1 of the cut portion 44 is set to be excessively short, the breakage of the outer peripheral portion 12 along the break portions 35 and 42 proceeds from the ends 35b and 42b to an unintended portion other than the cut portion 44, as described above. Therefore, it is not preferable. Further, if the total length L1 of the cut portion 44 is set to be excessively long, the compressive strength of the packaging box 10 in the Z direction decreases, which is not preferable. Therefore, the total length L1 of the cut portion 44 is set to 2 mm or more and 20 mm or less in order to prevent the breakage of the outer peripheral portion 12 at the cut portion 44 while suppressing a decrease in compressive strength. In addition, the total length L2 (total height of the packaging box 10) of the folding curve 16 of this embodiment is 146 mm.

  As shown in FIGS. 1 and 2, the end 44 a of the cut portion 44 located on the side of the upper lid portion 24 is located at a predetermined distance D 1 with respect to the folding curve 26. Further, the end 44b of the cutout portion 44 located on the lower lid portion 18 side is positioned with a predetermined distance D2 with respect to the folding curve 20. These intervals D1 and D2 are set as follows. If the distances D1 and D2 are excessively reduced, the strength of the corner portion where any one of the end plates 13A and 13B, any one of the side plates 14A and 14B, and any one of the lower lid portion 18 and the upper lid portion 24 is reduced, which is preferable. Absent. Therefore, in order to prevent the strength of the corners of the packaging box 10 from decreasing, the intervals D1 and D2 are set to 30 mm or more.

  In this way, the first break portion 35 and the second break portion 42 are formed in a discontinuous state, and the cut portion 44 and the first break portion 35, and the cut portion 44 and the second break portion 42 are also in a discontinuous state. Has been formed. Therefore, the impact resistance can be improved as compared with the conventional packaging box in which the break line and the cut line are continuous. Specifically, the strength of the ridge portion between the end plates 13A, 13B and the side plates 14A, 14B is provided by providing the first breaking portion 35, the second breaking portion 42, and the notch portion 44 for opening the packaging box 10. Can be prevented from falling excessively. Further, it is possible to minimize the decrease in the rigidity of the packaging box 10. As a result, even if the packaging box 10 is dropped during transportation, or another article collides, the ridge does not collapse. Further, even when the packaging boxes 10 are stacked, the ridges are not crushed.

  Moreover, the 1st fracture | rupture part 35 and the 2nd fracture | rupture part 42 are provided at intervals so that it may become a step difference in the Z direction in which the folding line 16 extends. Therefore, it is possible to suppress a decrease in rigidity of the packaging box 10 due to the provision of the first fractured portion 35 and the second fractured portion 42 on the entire outer peripheral portion 12. Moreover, the end 44a of the cut portion 44 is formed at the interval D1 defined with respect to the folding curve 26, and the end 44b of the cut portion 44 is formed at the interval D2 defined with respect to the folding curve 20. Therefore, it is possible to minimize the decrease in the rigidity (compressive strength) of the packaging box due to the provision of the cut portion 44.

(Auxiliary folding curve for opening)
As shown in FIGS. 1 and 2, the end plates 13 </ b> A and 13 </ b> B are provided with a pair of auxiliary folding curves 46 and 47 for promoting breakage along the first break portion 35. Further, the side plates 14A, 14B are provided with two sets of auxiliary folding curves 48, 49 for promoting breakage along the second break portion 42. Specifically, the side plates 14A and 14B are provided with one set of auxiliary folding curves 48 and 49 on the side of the end plate 13A with the second operating portion 37 as the center, and the remaining one set of auxiliary lines on the side of the end plate 13B. Folding curves 48 and 49 are provided.

  The first auxiliary folding curve 46 of the end plates 13A, 13B is formed by a general ruled line, and the upper lid is directed from the folding curve 31 side of the first operating portion 30 toward the side plates 14A, 14B farther from the first operating portion 30. It is inclined toward the portion 24 side. The end of the first auxiliary folding curve 46 on the side of the first operating portion 30 is positioned with a space from the folding curve 31. The end of the first auxiliary folding curve 46 on the side of the upper lid portion 24 is located at a distance from the folding curve 26.

  The second auxiliary folding curve 47 of the end plates 13A and 13B is made up of two general ruled lines extending in parallel, and the first auxiliary folding curve 46 is extended from the notch 44 side away from the first operating section 30. It inclines toward the part where the line and the folding curve 26 intersect. The end of the second auxiliary folding curve 47 on the cut portion 44 side is located at a distance from the cut portion 44. The end of the second auxiliary folding curve 47 on the side of the upper lid portion 24 is located at a distance from the folding curve 26.

  The first auxiliary folding curve 48 of each of the side plates 14A and 14B is a general ruled line, and is inclined from the folding curve 38 side of the second operating portion 37 toward the end plates 13A and 13B (both sides) toward the upper lid portion 24 side. is doing. The end of the first auxiliary folding line 48 on the second operating portion 37 side is located at a distance from the folding line 38. The end of the first auxiliary folding line 48 on the side of the upper lid portion 24 is located apart from the folding line 28.

  Each of the second auxiliary folding curves 49 of the side plates 14A and 14B is composed of two general ruled lines extending in parallel, and the extension line of the first auxiliary folding curve 48 and the folding curve 28 intersect from the cut portion 44 side. Is inclined towards. The end of the second auxiliary folding curve 49 on the side of the cut portion 44 is located at a distance from the cut portion 44. The end of the second auxiliary folding curve 49 on the side of the upper lid portion 24 is located at a distance from the folding curve 28.

(Opening the packaging box)
When the packaging box 10 is opened, for example, the end plates 13A and 13B are first broken along the first breaking portion 35 located on the upper lid portion 24 side. Specifically, the inside surrounded by the folding line 31, the first break line 32, and the second break line 33 is manually pushed to open the first operation portion 30 as shown in FIG.

  Then, the operator inserts his / her hand into the packaging box 10 from the first operation portion 30 and pulls the upper lid portion 24 side of the end plates 13A and 13B outward in the X direction and upward in the Z direction as indicated by arrow α. As a result, the end plates 13A and 13B start to break along the first breaking portion 35, and the end plates 13A and 13B bend along the first auxiliary folding curve 46 and the second auxiliary folding curve 47. Due to the bending of the auxiliary folding curves 46 and 47, the breakage of the end plates 13A and 13B along the first breakage portion 35 is promoted. The break stops when the end 35b of the first break portion 35 reaches the cut portion 44.

  At this time, the upper end 44 a (a part of the cut portion 44) of the cut portion 44 projects further upward (folder curve 26 side) than the upper first break portion 35. Therefore, the breakage of the end plates 13A and 13B along the first breakage portion 35 can be reliably stopped by the cutout portion 44. That is, the breakage of the end plates 13A and 13B tends to proceed in the direction of operating the first operation unit 30, but even in this case, the breakage can be stopped.

  Thereafter, as shown in FIG. 5, by further continuing the operation of gripping the first operation portion 30, the end plate 13A is formed along the fold line 16 in which the operation direction and the extending direction are the same with the cut portion 44 as the starting point. , 13B and the side plates 14A, 14B (ridges) are broken.

  Next, the inside surrounded by the folding line 38, the first break line 39, and the second break line 40 is pushed by hand to open the second operation portion 37. Then, a hand is inserted into the packaging box 10 from the second operation portion 37, and the upper lid portion 24 side of the side plates 14A and 14B is pulled outward in the Y direction and upward in the Z direction as indicated by an arrow β. As a result, the side plates 14A and 14B start to break along the second breaking portion 42, and the side plates 14A and 14B bend along the first auxiliary folding curve 48 and the second auxiliary folding curve 49. The bending of the auxiliary folding curves 48 and 49 promotes the breakage of the side plates 14A and 14B along the second break portion 42. Then, this break stops when it reaches the cut portion 44 from the end 42b of the second break portion 42.

  As a result, the packaging box 10 is in an opened state in which the lower lid portion 18 side is a tray shape and the upper lid portion 24 side is a developed sheet shape as shown in FIG. In the opening operation of the packaging box 10, the end plates 13A and 13B may be broken after the side plates 14A and 14B are broken.

  As described above, in the packaging box 10 according to the present embodiment, the intended unsealed form can be realized by forming the first break portion 35, the second break portion 42, and the cut portion 44. Further, in this opened state, since the lower lid portion 18 side has a tray shape, the workability of taking out the accommodated articles can be improved. Moreover, since the upper lid portion 24 side is disassembled in the expanded state, it does not become bulky and the convenience at the time of disposal can be improved.

  Further, the breaking work of the end plates 13A and 13B can be performed by operating the first operating unit 30, and the breaking work of the side plates 14A and 14B can be performed by operating the second operating unit 37. In addition, the end plates 13A and 13B are provided with auxiliary folding curves 46 and 47, and the side plates 14A and 14B are provided with auxiliary folding curves 48 and 49. Therefore, the workability of breaking the outer peripheral portion 12 can be improved, and the workability of opening the packaging box 10 can also be improved.

(Second embodiment)
7 to 12 show a packaging box 50 of the second embodiment. As shown in FIG. 7, the packaging box 50 is a wraparound case that includes a square tube-shaped outer peripheral portion 52 and lid portions 60, 60 that close openings at both ends of the outer peripheral portion 52. The outer peripheral portion 52 is composed of a bottom plate (second continuous plate) 53, a top plate (first continuous plate) 54, and a pair of side plates 55A and 55B. Each lid 60 includes a pair of inner flaps 61, 61 and a pair of outer flaps 63A, 63B. In the packaging box 50, the first break portions 35 are formed on the inner flap 61, the second break portions 42 are formed on the side plates 55A and 55B, respectively, and the notch 44 is formed between the inner flap 61 and the side plates 55A and 55B. Are formed on the respective curved lines 62.

(Outline of packaging box)
As shown in FIGS. 7 and 8, the bottom plate 53 and the top plate 54 have substantially the same rectangular shape extending along the XY plane and are arranged to face each other with a gap in the Z direction, and the side plates 55A and 55B and the lid portion. 60, 60 are provided in series at the ends. The side plates 55A and 55B have substantially the same rectangular shape extending along the ZX plane, and are arranged facing each other at both ends of the lid portions 60, 60 with a space in the Y direction.

  Referring to FIG. 9, the top plate 54, the side plate 55A, the bottom plate 53, and the side plate 55B are continuously arranged in this order from the upper side to the lower side through a folding line 57 formed of a general ruled line. In FIG. 9, an attachment plate 56 for attaching to a side plate 55B located at the lower end is connected to a top plate 54 located at the upper end via a folding line 57.

  Continuing to refer to FIG. 7 and FIG. 8, the lid portions 60, 60 have substantially the same rectangular shape extending along the YZ plane, and are arranged facing each other at both ends of the side plates 55A, 55B at intervals in the X direction. There is. The lid portion 60 has inner flaps 61, 61 connected to the ends of the side plates 55A, 55B, an outer flap (first outer flap) 63A connected to the end of the top plate 54, and an end of the bottom plate 53. It is configured with an outer flap (second outer flap) 63B that is continuously provided. The outer flaps 63A and 63B are arranged side by side in the Z direction on the outer surface side of the inner flap 61.

  Referring also to FIG. 9, the inner flaps 61, 61 are connected to the ends of the side plates 55A, 55B via a folding curve (first side) 62 made of a general ruled line. The outer flap 63A is connected to the end of the top plate 54 via a folding curve 64 (second side) formed by a general ruled line. The outer flap 63B is connected to the end of the bottom plate 53 via a folding line 65 made of a general ruled line. The portion where the folding curve 57 is located on the side of the top plate 54 is the third side of the side plates 55A and 55B.

  The packaging box 50 is sealed as follows, for example. First, in the blank state of FIG. 9, the articles to be accommodated are arranged on the upper surface (the back liner side) of the bottom plate 53. Then, the side plates 55A and 55B are bent with respect to the bottom plate 53. Then, the top plate 54 is bent with respect to the side plate 55A, and the attachment plate 56 is bent with respect to the top plate 54. Then, the outer surface of the side plate 55B and the inner surface of the sticking plate 56 are stuck (hot melt) using an adhesive such as a hot-melt resin. However, the sticking plate 56 may be stuck to the inner surface of the side plate 55B.

  Next, the inner flaps 61, 61 are bent with respect to the side plates 55A, 55B. Next, the outer flap 63A is bent with respect to the top plate 54, and the outer flap 63B is bent with respect to the bottom plate 53. Then, the overlapping portions of the inner flaps 61, 61 and the outer flaps 63A, 63B are attached by hot melt. As a result, the lid portion 60 is formed, and the openings at both ends of the outer peripheral portion 52 are sealed.

(Structure of the breaking part for opening)
As shown in FIGS. 7 to 9, the inner flap 61 is provided with a first breaking portion 35 for breaking the inner flap 61 by operating the outer flap 63A. The inner flap 61 of the present embodiment is formed with a notch 67 that is notched in the Y direction from the tip toward the side plates 55A and 55B. The first breaking portion 35 extends from the cutout portion 67 (on the tip side) toward the folding curve 62 along the folding curve 64 of the outer flap 63A. Further, the height position in the Z direction forming the first breakage portion 35 is biased toward the top plate 54 side with respect to the total height of the outer flap 63B. As shown most clearly in FIG. 8, in the first breaking portion 35 of the second embodiment, a downwardly inclined guide portion is formed on one of a plurality of cutting lines forming the first breaking portion 35. Has been done.

  The side plates 55A and 55B are provided with an operating section 37 similar to that of the first embodiment, and a second breaking section 42 for breaking the side plates 55A and 55B by operating the operating section 37. The second breaking portion 42 extends in the X direction from the outer end of the operating portion 37 in the X direction toward the folding curve 62 on the inner flap 61 side along the folding curve 57 on the top plate 54 side of the side plates 55A and 55B. There is.

  In the second embodiment, the operating portion 37 is formed below the center of the side plates 55A and 55B in the Z direction in order to increase the opening area of the bottom plate 53 side in the opened state. In the second breaking portion 42, the end 42a on the operating portion 37 side is located at the end (intersection point) of the operating portion 37, and the end 42b on the folding curve 62 side is located substantially in the center of the side plates 55A, 55B in the Z direction. . Specifically, the second breaking portion 42 inclines outward from the operation portion 37 toward the first breaking line 42A extending in the X direction and from the end of the first breaking line 42A toward the center of the side plates 55A and 55B in the Z direction. The second break line 42B and the third break line 42C extending from the end of the second break line 42B toward the folding line 62 are provided.

  The notch 44 is provided on the folding curve 62 between the inner flap 61 and the side plates 55A and 55B.

  As shown in FIG. 10, the relationship between the formation positions of the end 35b of the first breakage portion 35, the end 42b of the second breakage portion 42, and the cutout portion 44 is the same as in the first embodiment. Is set to be smaller than the first distance A (A> B), and the third distance C is set to be smaller than the first distance A (A> C). Further, the relationship between the ends 44a and 44b of the cut portion 44 and the positions of the folding curves 64 and 65 (intervals D1 and D2) is also provided similarly to the first embodiment.

  Therefore, in the packaging box 50 of the second embodiment, similarly to the first embodiment, it is possible to prevent the strength of the ridge between the inner flap 61 and the side plates 55A and 55B from being excessively reduced. Further, it is possible to minimize the decrease in the rigidity of the packaging box 50. As a result, even if the packaging box 50 is dropped during transportation or another article collides, the ridge portion is not crushed. Further, even when the packaging boxes 50 are stacked, the ridge portion is not crushed.

  The side plates 55A and 55B and the sticking plate 56 integrated with the side plate 55B are provided with auxiliary folding curves 48 and 49 for opening. Among them, the second auxiliary folding curve 49 is different from that of the first embodiment in that it is composed of one reverse ruled line. The outer flap 63A is not formed with an auxiliary folding curve for opening.

(Opening the packaging box)
As shown in FIG. 7, when opening the packaging box 50, for example, first insert a hand between the outer flaps 63A and 63B, and as shown by the arrow α, move the outer flap 63A on the top plate 54 side to the outside in the X direction. Pull upward and in the Z direction. As a result, the inner flap 61 is broken along the first breaking portion 35. The break stops when the end 35b of the first break portion 35 reaches the cut portion 44.

  After that, as shown in FIG. 11, by further continuing the operation of gripping the outer flap 63A, the inner flap 61 and the side plate 61 along the fold line 62 in which the operating direction and the extending direction are the same with the cutting portion 44 as the starting point. The part (ridge) between 55A and 55B is broken.

  Next, the operation portion 37 is opened, and a hand is inserted into the opening portion or inside the packaging box 50, and as shown by an arrow β, the top plate 54 side of the side plates 55A and 55B is pulled outward in the Y direction and upward in the Z direction. . As a result, the side plates 55A and 55B start to break along the second breaking portion 42. In addition, the side plates 55A and 55B fold along the first auxiliary folding curve 48, and the side plates 55A and 55B fold along the second auxiliary folding curve 49. Due to the bending of the auxiliary folding curves 48 and 49, breakage of the side plates 55A and 55B along the second break portion 42 is promoted. Then, this break stops when it reaches the cut portion 44 from the end 42b of the second break portion 42.

  As a result, as shown in FIG. 12, the packaging box 50 is in an opened state in which the bottom plate 53 side has a tray shape and the top plate 54 side has a developed sheet shape. In the opening operation of the packaging box 50, the inner flap 61 may be broken after the side plates 55A and 55B are broken.

  As described above, in the packaging box 50 of the second embodiment, like the first embodiment, the packaging box 50 can be opened in the intended opened state with good workability. Further, since the top plate 54 side is disassembled in the expanded state, it does not become bulky, and the convenience at the time of disposal can be improved. Further, the packaging box 50 of the second embodiment does not need to be provided with the first operation unit 30 shown in the first embodiment, and thus the rigidity of the packaging box 50 can be effectively prevented from decreasing.

(Modification of notch)
13A to 13G show modified examples of the cut portion 44 formed on the folding curves 16 and 62. The cut portion 44 may be formed at a different position as shown in FIGS. 13A and 13B, or may be partially or entirely inclined as shown in FIGS. 13C to 13E, or as shown in FIGS. 13F and 13G. It may be configured by a plurality of cutting lines.

  In the modified example of FIG. 13A, the lower end 44b of the cut portion 44 is positioned on the folding curve 26, 64 side (the operating direction) with respect to both the first breaking portion 35 and the second breaking portion 42. Is set to. In the modified example of FIG. 13B, the lower end 44b of the cut portion 44 is located on the folding curve 20, 65 side (opposite to the operating direction) with respect to both the first breaking portion 35 and the second breaking portion 42. It is set to be located.

  Further, the upper end 44a of the cut portion 44 is located on the folding curve 20, 65 side (opposite to the operating direction) of the upper first break portion 35, and the lower end 44b of the cut portion 44 is formed. May be set so as to be located on the folding curve 26, 64 side (operating direction) with respect to the lower second breaking portion 42. That is, the cut portion 44 may be provided between the first break portion 35 and the second break portion 42 in the Z direction.

  In the modification of FIG. 13C, the cut portion 44 has a vertical portion 44A extending along the folding lines 16 and 62 and an inclined portion 44B extending from the upper end of the vertical portion 44A so as to be inclined with respect to the folding lines 16 and 62. Prepare In the modification of FIG. 13D, the cut portion 44 has a vertical portion 44A extending along the folding curves 16 and 62 and an inclined portion 44B extending from the lower end of the vertical portion 44A so as to be inclined with respect to the folding curves 16 and 62. Prepare These inclined portions 44B project to the side of the second breaking portion 42, which is set based on the second breaking.

  In the modification of FIG. 13E, the notch 44 is made of one cutting line and is inclined with respect to the folding lines 16 and 62 as a whole. In this example, the upper end 44a of the cut portion 44 is located on the lower second break line 42 side, and the lower end 44b of the cut portion 44 is located on the upper first break line 42. It is inclined so as to be located on the 35 side. Thereby, the fracture along the first fracture line 35 is followed by the fracture along the second fracture line 42, or the fracture along the second fracture line 42 is followed by the fracture along the first fracture line 35. To prevent that. That is, the break along the breaks 35 and 42 can be reliably stopped by the notch 44. However, the notch 44 may be inclined in the direction opposite to that of FIG. 13E (line symmetry with respect to the folding curves 16 and 62).

  In the modification of FIG. 13F, the cut portion 44 is configured by a cutting line group including a plurality of (three in the drawing) cutting lines inclined with respect to the folding curves 16 and 62. The individual cutting lines are provided along the folding curves 16 and 62 with a predetermined interval. In this case, from the end 44a of the cutting line located closest to the folding curves 26 and 64 (operating direction) to the end 44b of the cutting line located farthest folding lines 20 and 65 (opposite to the operating direction). The interval (corresponding to the total length L1) is preferably set to 5 mm or more and 150 mm or less. Further, the inclination directions of the individual cutting lines forming the cut portion 44 may be opposite to each other, as in FIG. 13E.

  In the modification of FIG. 13G, the cut portion 44 is provided such that one end of the inclined cutting line is located on the folding curves 16 and 62. In this example, the upper end 44a of the cut portion 44 is located below the end 35b of the first break line 35, and the lower end 44b of the cut portion 44 is located below the end 42b of the second break line 42. Is also located on the upper side. Further, in the cut portion 44, the end on the second breaking portion 42 side is located on the folding curves 16 and 62, but even if the end on the first breaking portion 35 side is located on the folding curves 16 and 62. Good. In addition, the cutting lines constituting the cutting portion 44 may be inclined in opposite directions.

  Further, as shown in FIGS. 13C to 13G, the notch portion 44 may be partially located on the folding curves 16 and 62 (first side). That is, the notch provided on the first side includes not only the configuration in which the whole is located on the first side, but also the configuration in which only a part is located on the first side.

  The packaging boxes 10 and 50 of the present invention are not limited to the configuration of the above embodiment, and various modifications can be made.

  For example, in the packaging box 10 of the first embodiment, the first breaking portion 35 is provided only on one of the pair of end plates 13A, 13B, and the second breaking portion 42 is provided on only one of the pair of side plates 14A, 14B. May be provided. Also in the packaging box 50 of the second embodiment, the first breaking portion 35 is provided only on one inner flap 61 of the pair of lid portions 60, 60, and the first breaking portion 35 is provided on only one of the pair of side plates 55A, 55B. Two breaks 42 may be provided. In other words, the breaking structure of the packaging box is not limited to the structure in which the packaging box is divided into the upper and lower parts, and can be changed as necessary.

  As shown in FIG. 14, in the packaging box 10 of the first embodiment, the outer peripheral portion 12 may include a chamfer plate 70 between the end plates 13A and 13B and the side plates 14A and 14B. In this case, the notch 44 may be provided on the fold line 16 between the end plates 13A, 13B and the chamfer plate 70 as shown in the drawing, or the fold line 16 between the side plates 14A, 14B and the chamfer plate 70. It may be provided on the top. Further, as shown in FIG. 15, also in the packaging box 50 of the second embodiment, a chamfer plate 71 may be provided between the inner flaps 61, 61 and the side plates 55A, 55B.

  That is, in the packaging box 10 of the first embodiment, the end plates (first side plates) 13A, 13B and the side plates (second side plates) 14A, 14B may be consecutively provided via the chamfer plate 70. In the packaging box 50 of the second embodiment, the inner flap 61 and the side plates 55 </ b> A and 55 </ b> B may be continuously provided via the chamfer plate 71. In this way, the shape (number of corners) of the packaging box in plan view, side view, and end view can be changed as necessary.

  The first fractured portion 35 and the second fractured portion 42 may be formed at the same position in the Z direction, or the second fractured portion 42 may be arranged closer to the folding curves 26 and 64 than the first fractured portion 35. You may.

  In each embodiment, the first auxiliary folding curves 46 and 48 and the second auxiliary folding curves 47 and 49 are provided in order to promote the breakage of the wall plate, but as shown in FIG. 15, the second auxiliary folding curve 49 ( 47) may not be provided and only the first auxiliary folding curve 48 (46) may be provided.

  The material of the packaging boxes 10 and 50 is not limited to a paper corrugated cardboard sheet, and may be a resin corrugated cardboard sheet. The material of the packaging boxes 10 and 50 is not limited to a corrugated cardboard sheet, and may be a single cardboard or resin sheet.

10 ... Packaging box 12 ... Outer peripheral portion 13A, 13B ... End plate (first side plate)
14A, 14B ... Side plate (second side plate)
15 ... Adhesive plate 16 ... Folding curve (first side)
18 ... Lower lid (second continuous plate)
19A, 19B ... Inner flap 20 ... Folding curve (side facing the second side)
21A, 21B ... Outer flap 22 ... Folding curve (side facing the third side)
24 ... Top cover (first continuous plate)
25A, 25B ... Inner flap 26 ... Folding curve (second side)
27A, 27B ... Outer flap 28 ... Folding curve (3rd side)
30 ... 1st operation part 31 ... Folding curve 32 ... 1st fracture line 33 ... 2nd fracture line 35 ... 1st fracture part 35a ... 1st operation part side edge 35b ... 1st side edge 37 ... 2nd operation Part 38 ... Folding curve 39 ... First break line 40 ... Second break line 42 ... Second break part 42a ... Second operation part side end 42b ... First side end 42A ... First break line 42B ... Second Break line 42C ... Third break line 44 ... Cut portion 44a ... End on lid side 44b ... End on bottom lid part 46 ... First auxiliary folding curve 47 ... Second auxiliary folding curve 48 ... First auxiliary folding curve 49 ... second auxiliary folding curve 50 ... packaging box 52 ... outer peripheral portion 53 ... bottom plate (second continuous plate)
54 ... Top plate (first continuous plate)
55A, 55B ... Side plate 56 ... Adhesive plate 57 ... Folding curve (third side)
60 ... Lid part 61 ... Inner flap 62 ... Folding curve (first side)
63A ... outer flap (first outer flap)
63B ... outer flap (second outer flap)
64 ... Folding curve (second side)
65 ... Folding curve 67 ... Notch 70 ... Chamfer 71 ... Chamfer

Claims (8)

A first side plate having a first side and a second side intersecting the first side;
A second side plate that has a third side that intersects the first side and the second side, is provided continuously to the first side, and is bent with respect to the first side plate;
A first operation portion provided on the first side plate and operated toward the second side;
A first side plate provided on the first side plate, extending from the first operation portion side toward the first side along the second side, and for breaking the first side plate by an operation of the first operation portion; A fractured part,
A second break portion provided on the second side plate, extending along the third side, for breaking the second side plate;
A notch provided on the first side of the first side plate,
The end of the first fractured portion on the first side side and the end of the second fractured portion on the first side side are located at intervals in the direction in which the first side of the first side plate extends. Along with a defined first spacing,
The end of the first breakage portion and the notch portion are positioned with a second gap smaller than the first gap,
The packaging box, wherein the end of the second breakage portion and the cutout portion are positioned with a third gap smaller than the first gap. The first side plates are arranged in a pair so as to face each other,
The second side plates are arranged in a pair so as to face both ends of the first side plate,
A first continuous plate connected to the second side of the first side plate and the third side of the second side plate;
A second continuous plate connected to a side of the first side plate that faces the second side and a side of the second side plate that faces the third side;
The first side plate and the second side plate are broken along the first break part and the second break part, and the first side plate and the second side plate are formed along the first side with the cut part as a starting point. The packaging box according to claim 1, which is divided into the first continuous plate side and the second continuous plate side by breaking between the side plates.   The packaging box according to claim 1 or 2, wherein at least a part of the cut portion projects toward the second side of the first side plate more than the first break portion and the second break portion. The second side plate is provided with a second operation portion that is operated toward the third side of the second side plate,
The packaging box according to any one of claims 1 to 3, wherein the second breaking portion is provided from the second operation portion side toward the first side.   The end of the notch located on the side of the second side of the first side plate is located at a predetermined interval with respect to the second side of the first side plate. The packaging box according to any one of 1.   The end of the notch located on the opposite side facing the second side of the first side plate is located at a predetermined distance from the opposite side of the first side plate. The packaging box according to any one of items 1 to 5. An inner flap,
A first outer flap that has a second side that intersects with the first side of the inner flap, is fixed to the outer surface of the inner flap, and is opened toward the second side;
It has a third side that intersects the first side of the inner flap and the second side of the first outer flap, is connected to the first side of the inner flap, and is bent with respect to the inner flap. Side plate,
An operation of the first outer flap, which is provided on the inner flap, extends from the tip end side of the inner flap facing the first side toward the first side, and extends along the second side of the first outer flap. A first breaking portion for breaking the inner flap by
A second breaking portion provided on the side plate, extending along the third side, and breaking the side plate;
A notch provided on the first side of the inner flap,
The end of the first fractured portion on the first side side and the end of the second fractured portion on the first side side are located at intervals in the direction in which the first side of the first side plate extends. Along with a defined first spacing,
The end of the first breakage portion and the notch portion are positioned with a second gap smaller than the first gap,
The packaging box, wherein the end of the second breakage portion and the cutout portion are positioned with a third gap smaller than the first gap. A pair of the inner flaps arranged to face each other, the first outer flap fixed to the inner flap, and the first outer flap arranged side by side along the first side of the inner flap and fixed to the inner flap. A second outer flap that is formed, and a pair of lid portions that are disposed opposite to both ends of the pair of side plates that are disposed to face each other with a gap,
A first continuous plate connected to each of the first outer flap and the side plate;
Further comprising a second continuous plate connected to the second outer flap and the side plate,
The inner flap and the side plate are broken along the first break portion and the second break portion, and the space between the inner flap and the side plate is broken along the first side from the cut portion as a starting point. The packaging box according to claim 7, which is thus divided into the first continuous plate side and the second continuous plate side.

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