Packing box

Abstract

To achieve both securement of the rigidity of a packaging box and improvement in breaking property on a side plate portion thereof.SOLUTION: A packaging box 1 includes a first plate portion 10, a second plate portion 11, a first side plate portion 13A, a second side plate portion 16, and a breakage line 30 for breaking the side plate portions 13A and 16 to the first plate portion 10 side and the second plate portion 11 side. A first portion 30A of the breakage line 30 formed in the first side plate portion 13A has a pair of first broken portions 31A, 31B, single second broken portion 32, a pair of third broken portions 33A, 33B connected to the pair of first broken portions 31A, 31B and the second broken portion 32, and an opening operation portion 34 provided only on one side 33A of the pair of third broken portions 33A, 33B. The first broken portions 31A, 31B are composed of a single zipper including a plurality of first cutting lines 31c and a second cutting line 31d connected to the first cutting line 31c and inclined toward the second broken portion 32 side, and is inclined as a whole from a center side in a second direction Y toward outside to the second broken portion 32 side.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Patent Document 1 discloses a general-purpose packaging box with top and bottom lids made of four flaps, and Patent Document 2 discloses a wrap-around type packaging box with a pair of opposing side lids made of four flaps. These packaging boxes have a horizontally extending break line, and can be opened by breaking the box along the break line in a state where the packaging box is divided into top and bottom halves.

[0003] The portion of the break line formed on the long side surface (side plate portion) includes a pair of first break portions extending from the horizontal outer side toward the center of the long side surface, a second break portion arranged at an interval in the vertical direction relative to the first break portions, and a pair of third break portions continuing to the first break portion and the second break portion. Also, a pair of opening operation portions are provided on the long side surface so as to include the third break portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Design Registration No. 1673217 [Patent Document 2] Design Registration No. 1673218 Summary of the Invention [Problem to be solved by the invention]

[0005] The packaging boxes of Patent Documents 1 and 2 have two opening operation sections on one side plate, which improves the breakability of the side plate, but the rigidity of the side plate (packaging box) decreases due to an increase in fold lines and cut lines. Therefore, there is room for improvement in the packaging boxes of Patent Documents 1 and 2 in terms of both ensuring the rigidity of the packaging box and improving the breakability of the side plate.

[0006] An object of the present invention is to ensure the rigidity of a packaging box while improving the breakability of the side plate portions. [Means for solving the problem]

[0007] The present invention provides a method for manufacturing a semiconductor device comprising: a first plate portion extending in a first direction and a second direction intersecting with the first direction; a second plate portion provided at a distance from the first plate portion in a third direction intersecting with both the first direction and the second direction; first side plate portions connected to the first plate portion and the second plate portion, respectively, and extending in the second direction and the third direction; second side plate portions connected to the first plate portion and the second plate portion, respectively, and extending in the first direction and the third direction; and a break line provided on the first side plate portion and the second side plate portion for breaking them to the first plate portion side and the second plate portion side, wherein a first portion of the break line formed on the first side plate portion includes a pair of first break portions extending from an outer side to a center side in the second direction, and a pair of first break portions provided at a distance from the pair of first break portions in the third direction, positioned between the pair of first break portions, and the second break portion. the packaging box has one second breaking portion extending in a direction parallel to the second direction, a pair of third breaking portions respectively connected to ends of the pair of first breaking portions on a central side in the second direction and to ends of the second breaking portion located near these ends, and an opening operation portion provided on only one side of the pair of third breaking portions and inclined in the third direction from the first breaking portion side to the second breaking portion side, the first breaking portion comprising a one-sided zipper including a plurality of first cutting lines provided at intervals in the second direction and second cutting lines connected to outer ends of the first cutting lines in the second direction and inclined toward the second breaking portion side in the third direction as they move away from the continuous first cutting lines, and the first breaking portion is inclined overall from the central side in the second direction toward the second breaking portion side in the third direction.

[0008] The first side plate portion is provided with a pair of first breaking portions, one second breaking portion, and a pair of third breaking portions, but the opening operation portion is provided on only one of the pair of third breaking portions. Therefore, the rigidity of the first side plate portion (i.e., the packaging box) can be ensured compared to a case in which two opening operation portions are provided on the first side plate portion.

[0009] The opening operation part formed on the first side plate part is inclined toward the center in the second direction from the first breaking part side to the second breaking part side. Therefore, the operating force of the opening operation part can be efficiently transmitted to the third breaking part side where no opening operation part is formed. Therefore, it is possible to prevent the breakage from progressing in an unintended direction, and the breakability of the first side plate part can be improved.

[0010] The first breaking portion is made of a one-sided zipper, and the second cutting line constituting the one-sided zipper is inclined toward the second breaking portion as it moves away from the first cutting line. Therefore, the first breaking portion can reliably guide the breaking of the first side plate portion toward the second breaking portion. Also, the first breaking portion is inclined as a whole from the center side in the second direction toward the outside toward the second breaking portion. Therefore, a wide opening area can be secured on the first breaking portion side. Effect of the Invention

[0011] According to the present invention, it is possible to ensure the rigidity of the packaging box while improving the breakability of the side plate portions. [Brief description of the drawings]

[0012] [Figure 1] 1 is a perspective view of a packaging box according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view showing a blank for the packaging box of FIG. 1; [Diagram 3] FIG. 3 is an enlarged plan view of part III in FIG. 2 . [Figure 4] FIG. 4 is an enlarged plan view of part IV in FIG. 3 . [Diagram 5] 1 is a perspective view showing an opening process 1 of a packaging box according to a first embodiment. [Figure 6] 2 is a perspective view showing an opening process 2 of the packaging box of the first embodiment. FIG. [Figure 7] 3 is a perspective view showing an opening process 3 of the packaging box of the first embodiment. FIG. [Figure 8] 4 is a perspective view showing an opening process 4 of the packaging box of the first embodiment. FIG. [Figure 9] FIG. 2 is a perspective view showing the packaging box of the first embodiment in an opened state. [Figure 10]FIG. 11 is a perspective view of a packaging box according to a second embodiment. [Figure 11] FIG. 11 is a plan view showing a blank for the packaging box of FIG. 10 . [Figure 12] 11 is a perspective view showing an opening process 1 of a packaging box according to a second embodiment. FIG. [Figure 13] 13 is a perspective view showing an opening process 2 of the packaging box of the second embodiment. FIG. [Figure 14] 13 is a perspective view showing an opening process 3 of the packaging box of the second embodiment. FIG. [Figure 15] FIG. 11 is a perspective view showing an opened state of a packaging box according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] (First embodiment) 1 shows a packaging box 1 according to a first embodiment of the present invention. This packaging box 1 is a wraparound case in which a pair of openings defined by a top plate 10, a bottom plate 11, and a pair of side plates 13A, 13B are each closed by a lid portion 16. The pair of side plates 13A, 13B and the pair of lid portions 16 are provided with break lines 30 for breaking the packaging box 1 to the top plate 10 side and the bottom plate 11 side.

[0015] In the drawings referred to in the following description, the X direction is the width direction of the packaging box 1, the Y direction is the length direction of the packaging box 1, and the Z direction is the height direction of the packaging box 1. The width direction X is the first direction in the present invention, the length direction Y is the second direction in the present invention, and the height direction Z is the third direction in the present invention.

[0016] 1, the packaging box 1 is a rectangular parallelepiped whose length direction Y is longer than its width direction X, and whose width direction X is longer than its height direction Z. However, the width direction X, length direction Y, and height direction Z dimensions of the packaging box 1 are changed depending on the items to be stored therein.

[0017] Specifically, the dimension in the length direction Y is set to 250 mm or more, the dimension in the height direction Z is set to 200 mm or less, and the dimension in the width direction X is set to be equal to or greater than the dimension in the height direction Z. In other words, taking the dimension in the length direction Y as a reference, the dimension in the height direction Z is set to be 80% or less of the dimension in the length direction Y, and the dimension in the width direction X is set to be 80% or more of the dimension in the length direction Y.

[0018] More specifically, in the packaging box 1 of this embodiment, the dimension in the length direction Y is set to 487 mm, the dimension in the width direction X is set to 387 mm, and the dimension in the height direction Z is set to 110 mm. In this way, the long side of the packaging box 1, which is a low and long thin rectangular parallelepiped, is difficult to break, and the break may progress (derail) in a direction different from the extension direction of the break line 30. In this embodiment, this problem is suppressed and not only is the breakability of the side panels 13A, 13B improved, but the reduction in rigidity of the packaging box 1 due to the formation of the break line 30 is also suppressed.

[0019] The configuration of the packaging box 1 will now be described in detail.

[0020] (Overview of the packaging box) The packaging box 1 shown in Fig. 1 is formed by folding a blank shown in Fig. 2 at predetermined positions and bonding the predetermined positions. The blank is formed by punching a paper corrugated cardboard sheet with a well-known paper container punching device. The cardboard sheet is configured with a corrugated core disposed between a front liner (the outer surface of the packaging box 1) and a back liner (the inner surface of the packaging box 1).

[0021] The part shown by the dashed line in Figure 2 is a general-purpose score line formed by scoring from the back liner side to compress the thickness. The part shown by the solid line in Figure 2 is a cutting line formed by cutting from the back liner to the front liner with a blade, and a shaped line (side) by punching.

[0022] Referring to FIG. 1, the top plate (first plate portion) 11 and the bottom plate (second plate portion) 12 are formed in roughly the same rectangular shape, both extending along the XY plane and arranged at an interval in the height direction Z.

[0023] 1, the pair of side plates (first side plate portions) 13A, 13B are formed in a substantially identical rectangular shape and each extend along the YZ plane. The pair of lid portions (second side plate portions) 16 are formed in a substantially identical rectangular shape and each extend along the XZ plane.

[0024] One side plate 13B of the pair of side plates 13A, 13B includes a side plate body 14 and an attachment portion 15, which are attached (fixed) with an adhesive such as a hot melt resin. Each lid portion 16 includes a pair of inner flaps 17 spaced apart in the width direction X, and a pair of outer flaps 18 spaced apart in the height direction Z. A pair of outer flaps 18 are arranged on the outer surfaces of the pair of inner flaps 17, and the overlapping portions of these are attached with an adhesive such as a hot melt resin, similar to the side plate 13B.

[0025] The side plates 13A and 13B are continuous with both ends of the top plate 10 in the width direction X via bent portions 20 extending in the length direction Y. In addition, the side plates 13A and 13B are continuous with both ends of the bottom plate 11 in the width direction X via bent portions 21 extending in the length direction Y.

[0026] 2, the side panel body 14, the top panel 10, the side panel 13A, the bottom panel 11, and the attachment portion 15 are connected in this order from top to bottom. The side panel body 14 and the side panel 13A are connected to the top and bottom of the top panel 10 via the fold lines 20a constituting the folding portion 20. The side panel 13A and the attachment portion 15 are connected to the top and bottom of the bottom panel 11 via the fold lines 21a constituting the folding portion 21. The fold lines 20a are general-purpose creases, and the fold lines 21a are lead creases. The lead creases are configured by providing multiple cut lines at intervals on the general-purpose creases in order to improve the folding ability more than the general-purpose creases. Since the attachment portion 15 has a short protruding dimension and is located at the end of the blank, the number of cutting lines of the lead crease (fold line 21a) between the bottom plate 11 and the attachment portion 15 is greater than the number of cutting lines of the lead crease (fold line 21a) between the bottom plate 11 and the side plate 13A.

[0027] After the side panel body 14 is folded relative to the top panel 10, the bottom panel 11 is folded relative to the side panel 13A, and the attachment portion 15 is attached to the outer surface of the side panel body 14 (outer glue). As a result, the side panel body 14 and the attachment portion 15 are integrated as the side panel 13B.

[0028] The attachment portion 15 may be connected to the top plate 10, and the side plate body 14 may be connected to the bottom plate 11. As shown by the dashed line in Fig. 2, the attachment portion 15 may be connected to the side plate 13B and attached to the bottom plate body, or may be connected to the side plate 13A and attached to the top plate body. The attachment portion 15 is not limited to being attached to the outer surface of the attachment target (outer glue), but may be attached to the inner surface of the attachment target (inner glue).

[0029] The pair of inner flaps 17 are rectangular in shape with dimensions such that their tips are positioned in a straight line with the tips of the outer flaps 18 in the blank state shown in Fig. 2. The pair of outer flaps 18 are rectangular in shape with dimensions such that their tips abut each other in the sealed state shown in Fig. 1. Referring to Fig. 1, the four inner flaps 17 (two pairs) in total are connected to the ends of the length direction Y of each of the side panels 13A and 13B via bent portions 22 extending in the height direction Z. The four outer flaps 18 (two pairs) in total are connected to the ends of the length direction Y of each of the top panel 10 and bottom panel 11 via bent portions 23 extending in the width direction X.

[0030] 2, of the four inner flaps 17, two are connected to both sides of the side panel main body 14 via fold lines 22a that form the fold portion 22, and the remaining two are connected to both sides of the side panel 13B via fold lines 22a. Of the four outer flaps 18, two are connected to both sides of the top panel 10 via fold lines 23a that form the fold portion 23, and the remaining two are connected to both sides of the bottom panel 11 via fold lines 23a. The fold lines 22a, 23a are both general-purpose lines and are arranged in a generally straight line.

[0031] (Break line structure for opening) 1, the break line 30 is made up of a plurality of cut lines, and breaks (separates) the packaging box 1 into the top plate 10 side and the bottom plate 11 side (see FIG. 9). Also referring to FIG. 2, the break line 30 includes a first portion 30A provided on each of the side plates 13A and 13B, a second portion 30B provided on each of the inner flaps 17, and a third portion 30C provided between the first portion 30A and the second portion 30B.

[0032] 1 and 3, the first portion 30A includes a pair of first breaking portions 31A, 31B, one second breaking portion 32, and a pair of third breaking portions 33A, 33B. When viewed from a direction facing the side plates 13A, 13B, the first breaking portion 31A and the third breaking portion 33A are located to the left of the center in the longitudinal direction Y, and the first breaking portion 31B and the third breaking portion 33B are located to the right of the center in the longitudinal direction Y. The first portion 30A is also provided with one opening operation portion (hereinafter abbreviated as "operation portion") 34.

[0033] The first portion 30A is provided in a central region when the side plates 13A, 13B are divided into approximately three equal parts in the height direction Z. The first portion 30A of the side plate 13B is located in a portion of the side plate main body 14 that does not overlap with the attachment portion 15.

[0034] 1 and 3, the pair of first breakage portions 31A, 31B are provided above (on the top plate 10 side) half the total height of the side plates 13A, 13B. The pair of first breakage portions 31A, 31B are provided at both ends of the side plates 13A, 13B in the longitudinal direction Y, respectively, and extend from the outer side to the center side in the longitudinal direction Y. In the longitudinal direction Y, the proportion of each of the first breakage portions 31A, 31B to the total length of the side plates 13A, 13B is approximately 10%. In this embodiment, since the dimension of the side plates 13A, 13B in the longitudinal direction Y is 487 mm, each of the first breakage portions 31A, 31B is provided within a range of approximately 49 mm.

[0035] The outer ends 31a of the first breaking portions 31A, 31B in the longitudinal direction Y are disposed at a breakable interval from the third portion 30C (fold line 22a). The inner ends 31b of the first breaking portions 31A, 31B in the longitudinal direction Y are disposed at a breakable interval from the third breaking portions 33A, 33B. The breakable interval refers to a distance at which the non-cut portion (continuous portion) can be broken by applying an external force so as to connect with the adjacent cut lines.

[0036] 1 and 4, the first breakage portions 31A, 31B are configured by a one-sided zipper including a plurality of (three in this embodiment) first cut lines 31c spaced apart in the longitudinal direction Y, and a second cut line 31d continuing to the first cut lines 31c. Although only the first breakage portion 31A is shown in Fig. 4, the first breakage portion 31B appears symmetrically to the first breakage portion 31A in Fig. 4.

[0037] The second cutting line 31d is provided on all of the first cutting lines 31c except for one located at the outermost position in the length direction Y. The second cutting line 31d is connected to the outer end of the first cutting lines 31c in the length direction Y, and is inclined toward the second breaking portion 32 side (the bottom plate 11 side) as it moves away from the continuous first cutting line 31c. In addition, the second cutting line 31d and the discontinuous first cutting line 31c located outside the second cutting line 31d in the length direction Y are located at a breakable interval. This makes it possible to guide the breaking of the side plates 13A, 13B along the first breaking portions 31A, 31B downward, contrary to the upward operation of the operating portion 34. Therefore, the first breaking portions 31A, 31B can reliably guide the breaking of the side plates 13A, 13B toward the second breaking portion 32 side.

[0038] 4, the first breaking portions 31A, 31B are further inclined from the center side in the length direction Y toward the second breaking portion 32 side (the bottom plate 11 side) as a whole outwardly. The individual first cutting lines 31c extend parallel to the bottom plate 11 (the folding lines 21a), but are formed at different positions in the height direction Z, and are disposed closer to the bottom plate 11 as they move outwardly from the center side in the length direction Y. Thus, the entire first breaking portions 31A, 31B including the multiple first cutting lines 31c are inclined from the center side in the length direction Y toward the bottom plate 11 side outwardly.

[0039] The angle α between the first breaking portions 31A, 31B and the bottom plate 11 (fold line 21a) is preferably set to be greater than 0 degrees (not including 0 degrees) and equal to or less than 30 degrees, and more preferably set to be equal to or less than 15 degrees. If the angle α is made too small, the opening area (volume) of the top plate 10 side of the packaging box 1 is reduced, which impairs the exposure and removal workability of the stored items. On the other hand, if the angle α is made too large, it becomes difficult to break the side plates 13A, 13B along the first breaking portions 31A, 31B by operating the operating part 34 upward. In order to prevent these inconveniences, the angle α is preferably set within the above-specified range, and is set to 6.5 degrees in this embodiment.

[0040] 1 and 3, the second breaking portion 32 is provided below (on the bottom plate 11 side) half the total height of the side plates 13A, 13B. That is, the second breaking portion 32 is provided at a distance in the height direction Z from the pair of first breaking portions 31A, 31B. More specifically, the second breaking portion 32 is provided between the first breaking portions 31A, 31B and extends in the length direction Y.

[0041] Both ends 32a, 32b of the second breaking portion 32 are located at a distance inward from the inner ends 31b of the first breaking portions 31A, 31B in the longitudinal direction Y. In Fig. 1, the first end 32a of the second breaking portion 32 located on the left side is disposed at a distance that allows it to be broken relative to the third breaking portion 33A, and the second end 32b of the second breaking portion 32 located on the right side is disposed at a distance that allows it to be broken relative to the third breaking portion 33B.

[0042] The second break portion 32 is made up of a plurality of cut lines spaced apart in the length direction Y to form a perforation, and extends linearly from the first end 32a to the second end 32b. However, the second break portion 32 may be inclined, may be curved as a whole, or may be formed as a wave shape with repeated concaves and convexes in the height direction Z as a whole, and the shape thereof may be changed as necessary.

[0043] 1 and 4, the second breaking portion 32 is composed of two kinds of cutting lines 32c, 32d having different dimensions in the length direction Y. The dimension of the first cutting line 32c in the length direction Y is longer than the dimension of the second cutting line 32d in the length direction Y. The dimension of the first cutting line 32c in the length direction Y is longer than the dimension of the second cutting line 32d in the length direction Y. The dimension of the first cutting line 32c is, for example, 10 mm, and the dimension of the second cutting line 32d is, for example, 3 mm. Two first cutting lines 32c are provided on the third breaking portion 33A side. Many second cutting lines 32d are provided on the third breaking portion 33B side.

[0044] 1 and 3, the third breakable portions 33A and 33B are provided between the pair of first breakable portions 31A and 31B and one second breakable portion 32. Each of the third breakable portions 33A and 33B is formed by a plurality of cut lines provided at breakable intervals. In the length direction Y, the proportion of each of the third breakable portions 33A and 33B to the total length of the side plates 13A and 13B is approximately 20%. In this embodiment, since the dimension of the side plates 13A and 13B in the length direction Y is 487 mm, the dimension of each of the third breakable portions 33A and 33B in the length direction Y is set within a range of approximately 98 mm. This is to allow an ordinary adult's hand to be inserted into the operating portion 34, a part of which is defined by the third breakable portion 33A.

[0045] Specifically, the third breaking portion 33A is connected to the inner end 31b of the first breaking portion 31A and the first end 32a of the second breaking portion 32. The third breaking portion 33B is connected to the inner end 31b of the first breaking portion 31B and the second end 32b of the second breaking portion 32. The third breaking portion 33 connected to the first breaking portions 31A, 31B and the second breaking portion 32 is not limited to a configuration in which they are connected in a geometrically strict sense, and includes a configuration in which they are positioned with a breakable interval therebetween.

[0046] 1 and 4, the third breaking portion 33A is curved with a predetermined curvature, with the center located on the upper side (top plate 10 side) and curved downward (bottom plate 11 side). In other words, the third breaking portion 33A is formed in a curved shape that gradually approaches the bottom plate 11 from the outside toward the inside in the longitudinal direction Y. The outer end 33a of the third breaking portion 33A in the longitudinal direction Y is located at a breakable distance from the inner end 31b of the first breaking portion 31A. The inner end 33b of the third breaking portion 33A in the longitudinal direction Y is located at a breakable distance from the first end 32a of the second breaking portion 32.

[0047] 1 and 3. The third breaking portion 33B is formed in a straight line sloping downward to the left. That is, the third breaking portion 33B is formed in a straight line sloping downward from the outside to the inside in the longitudinal direction Y. The outer end 33a of the third breaking portion 33B in the longitudinal direction Y is located at a breakable distance from the inner end 31b of the first breaking portion 31B. The inner end 33b of the third breaking portion 33B in the longitudinal direction Y is located at a breakable distance from the second end 32b of the second breaking portion 32.

[0048] 1 and 3, the operating part 34 is provided to include only the third breaking part 33A of the pair of third breaking parts 33A, 33B. In other words, the operating part 34 is provided on the left side of the center in the longitudinal direction Y when viewed from the direction facing the side plates 13A, 13B. The operating part 34 is inclined toward the center in the longitudinal direction Y from the first breaking part 31A side toward the second breaking part 32 side.

[0049] 1 and 4, the operating portion 34 is defined by the third breaking portion 33A, a cut line 35 continuing to the outer end 33a of the third breaking portion 33A, and a fold line 36 continuing to the inner end 33b of the third breaking portion 33A. However, the operating portion 34 may be an opening formed by punching.

[0050] As shown most clearly in Figure 4, the cut line 35 is provided on the top plate 10 side of the third breaking portion 33A of the side plates 13A, 13B. The cut line 35 is composed of two (or more) cutting lines provided at a breakable interval. The cut line 35 is curved with a predetermined curvature, with its center located on the lower side (the bottom plate 11 side) and curved upward (towards the top plate 10).

[0051] The score line 35 is connected to the outer end 33a of the third breaking portion 33A (i.e., the inner end 31b of the first breaking portion 31A) and extends toward the center in the longitudinal direction Y. Here, the score line 35 connected to the outer end 33a of the third breaking portion 33A is not limited to a configuration in which it is connected in a strict geometric sense, but includes a configuration in which it is located at a breakable interval. In this embodiment, the outer end 35a of the score line 35 located on the outer side of the longitudinal direction Y of the side plates 13A, 13B is disposed between the inner end 31b of the first breaking portion 31A and the outer end 33a of the third breaking portion 33A, and is located at a breakable interval from both the first breaking portion 31A and the third breaking portion 33A.

[0052] Of the score line 35, the inner end 35b located toward the center in the length direction Y of the side plates 13A, 13B is disposed closer to the center in the length direction Y than the outer end 35a and lower (toward the bottom plate 11) in the height direction Z. In the length direction Y, the score line 35 accounts for approximately 35% of the total length of the third breaking portion 33A. That is, in FIG. 4, the inner end 35b of the score line 35 is disposed in a position one-third of the way to the left of the third breaking portion 33A.

[0053] Continuing to refer to Fig. 4, the fold line 36 is a general-purpose crease that is inclined from the upper side (the first break portion 31A side) to the lower side (the second break portion 32 side) toward the center in the length direction Y. The fold line 36 has an outer end 36a adjacent to the outer end 35b of the cut line 35, and an inner end 36b adjacent to the inner end 33b of the third break portion 33A. Here, the adjacent ends are not limited to being spaced apart, but include being located at the same point.

[0054] The angle β between the fold line 36 and the bottom plate 11 is preferably set to 15 degrees or more and 45 degrees or less, and more preferably set to 25 degrees or more and 35 degrees or less. The smaller the angle β, the less likely the operating force of the operating part 34 is to be transmitted to the distant parts. The larger the angle β, the smaller the displacement amount by which the edges of the fracture line 31 move away from each other due to the operation of the operating part 34, and therefore the frangibility of the side plates 13A, 13B also decreases accordingly. In other words, in order to break the side plates 13A, 13B that are elongated from one end side to the other end in the length direction Y, it is not preferable that the angle β is too small or too large. Therefore, it is preferable that the angle β is set within the above-specified range, and in this embodiment, it is set to 30 degrees.

[0055] 1 and 2, the second portion 30B is provided on each of the four inner flaps 17, and each of them extends in the width direction X. The second portion 30B is provided in the center of the overall height of the inner flap 17 so as to be located between the first breaking portions 31A, 31B and the second breaking portion 32 of the first portion 30A. In other words, the second portion 30B is provided on the second breaking portion 32 side of the first breaking portions 31A, 31B of the first portion 30A in the height direction Z.

[0056] 1 and 4, the second portion 30B of this embodiment is configured as a one-sided zipper having a plurality of first cut lines 37 spaced apart in the width direction X and second cut lines 38a, 38b continuing from the ends of the first cut lines 37.

[0057] The second cutting lines 38a, 38b are provided on all of the first cutting lines 37 except one of the ends of the inner flap 17 farthest from the side plates 13A, 13B, and are connected to the outer ends of the first cutting lines 37 in the width direction X (i.e., the ends on the side plates 13A, 13B side). Among them, the second cutting line 38a is provided on the first cutting line 37 closest to the side plates 13A, 13B, and is inclined toward the top plate 10 as it approaches the side plates 13A, 13B. The end of the second cutting line 38a that is not connected to the first cutting line 37 is located at a breakable distance from the third portion 30C. The second cutting line 38b is provided on the other first cutting lines 37, and is inclined toward the bottom plate 11 as it approaches the side plates 13A, 13B. Of the second cutting lines 38b, the end not connected to the first cutting lines 37 is positioned at a breakable distance from the adjacent first cutting line 37.

[0058] 1 and 2, the third portion 30C is composed of one cutting line extending in the height direction Z, and is provided at a breakable interval in both the first breaking portions 31A, 31B and the second breaking portion 32. Referring to Fig. 4, the upper end of the third portion 30C is disposed above the outer ends 31a of the first breaking portions 31A, 31B, and the lower end of the third portion 30C is disposed between the first breaking portions 31A, 31B of the first portion 30A and the second portion 30B.

[0059] More specifically, the third portion 30C is provided on the ridge between the side plates 13A, 13B and the inner flap 17, i.e., on the bent portion 22 (the bent line 22a). However, the third portion 30C may be provided on the side plates 13A, 13B side of the bent line 22a or on the inner flap 17 side of the bent line 22a, as long as the third portion 30C is an area (the bent portion 22) that forms an arc shape by a mountain fold along the bent line 22a.

[0060] Next, an example of a method for opening the packaging box 1 thus configured will be described.

[0061] First, in Fig. 1, the operating portion 34 of the side panel 13A is pushed inward from the outside in the width direction X. This breaks the side panel 13A along the third breaking portion 33A and the cut line 35, opening the operating portion 34. Next, the side panel 13A is held by the edge of the fold line 36 of the operating portion 34, and is manipulated upward to the right side toward the top panel 10 in Fig. 1, more specifically, in a direction perpendicular to the fold line 36.

[0062] As a result, as shown in FIG. 5, the side panel 13A is broken along the first break portion 31A and the second break portion 32, which are connected to the operating portion 34, of the first portion 30A of the break line 30. When the break of the side panel 13A along the first break portion 31A is completed, the ridge portion between the side panel 13A and the left inner flap 17 is broken along the bent portion 22 through the third portion 30C. Also, as shown in FIG. 6, when the break of the side panel 13A along the second break portion 32 is completed, the side panel 13A is broken along the third break portion 33B, and then the side panel 13A is broken along the first break portion 31B. Then, the ridge portion between the side panel 13A and the right inner flap 17 is broken along the bent portion 22 through the third portion 30C.

[0063] 7, the operating portion 34 of the side plate 13B is operated in the same manner as the side plate 13A, and the side plate 13B is broken along the pair of first breaking portions 31A, 31B, the single second breaking portion 32, and the pair of third breaking portions 33A, 33B. The opening operation of the side plate 13B may be performed before the opening operation of the side plate 13A, or may be performed simultaneously with the opening operation of the side plate 13A.

[0064] Next, insert your hands between the pair of outer flaps 18 of each lid portion 16, and move the outer flap 18 connected to the top plate 10 toward the top plate 10. This causes all the inner flaps 17 to break along the second portions 30B of the breaking lines 30, as shown in Fig. 8. The lid portions 16 may be broken one by one in order, or may be broken before the side plates 13A and 13B are broken.

[0065] 9, the packaging box 1 can be separated into the top plate 10 side and the bottom plate 11 side, and the bottom plate 11 side can be opened in a tray-like state. Also, without breaking along the ridge (folded portion 22) between the side plates 13A, 13B and the inner flap 17, the side plates 13A, 13B can be broken along the first portion 30A and the inner flap 17 can be broken along the second portion 30B continuously via the third portion 30C.

[0066] The packaging box 1 configured in this manner has the following features.

[0067] Although the side plates 13A and 13B are provided with a pair of first breaking portions 31A and 31B, one second breaking portion 32, and a pair of third breaking portions 33A and 33B, the operating portion 34 is provided only on one side 33A of the pair of third breaking portions 33A and 33B. Therefore, the rigidity of the side plates 13A and 13B (i.e., the packaging box 1) can be ensured, compared to a case in which two operating portions 34 are provided on each of the side plates 13A and 13B.

[0068] The operating portion 34 formed on the side plates 13A, 13B is inclined in the height direction Z from the first breaking portions 31A, 31B side toward the second breaking portion 32 side toward the center side in the length direction Y. Therefore, the operating force of the operating portion 34 can be efficiently transmitted to the third breaking portion 33B side where the operating portion 34 is not formed. This makes it possible to prevent the breakage from progressing in an unintended direction, improving the breakability of the side plates 13A, 13B.

[0069] The first breaking portions 31A, 31B are made of a one-sided zipper, and the second cutting line 31d constituting the one-sided zipper is inclined toward the second breaking portion 32 as it moves away from the first cutting line 31c. Therefore, the first breaking portions 31A, 31B can reliably guide the breaking of the side plates 13A, 13B toward the second breaking portion 32 side. Moreover, the first breaking portions 31A, 31B are inclined as a whole from the center side in the length direction Y toward the outside toward the second breaking portion 32 side in the height direction Z. Therefore, a wide opening area can be secured on the side of the first breaking portions 31A, 31B.

[0070] The operating portion 34 has a score line 35 continuing to the outer end 33a of the third breaking portion 33A. This allows for a wide range of freedom in setting the inclination angle (angle β) of the fold line 36 formed between the score line 35 and the inner end 33b of the third breaking portion 33A. This ensures the transferability of the operating force to the third breaking portion 33B side where the operating portion 34 is not formed, and reliably improves the breakability of the side plates 13A and 13B.

[0071] The packaging box 1 is a wraparound case in which it is difficult to break the side plates 13A, 13B in the longitudinal direction Y, but the first portion 30A having the above-described configuration is formed in the side plates 13A, 13B. Therefore, the rigidity of the side plates 13A, 13B can be ensured, and the long and thin side plates 13A, 13B can be reliably broken along the break line 30.

[0072] The break line 30 has a second portion 30B formed in the inner flap 17 and a third portion 30C formed in the ridge portion (folded portion 22) between the side plates 13A, 13B and the inner flap 17. Therefore, the break of the side plates 13A, 13B along the first portion 30A and the break of the inner flap 17 along the second portion 30B are connected via the third portion 30C, and the packaging box 1 can be separated into the top plate 10 side and the bottom plate 11 side. In addition, since the second portion 30B is located on the second break portion 32 side of the first portion 30A, a wide opening area can be secured on the first break portions 31A, 31B side.

[0073] Both operation parts 34 of side plates 13A, 13B are located to the left of the center in the longitudinal direction Y when viewed from the direction facing side plates 13A, 13B. Therefore, when opening the packaging box 1 along the breaking line 30, for example, by rotating the packaging box 1, the side plates 13A, 13B can be broken with the same action, improving the ease of opening.

[0074] Other embodiments and various modifications of the present invention will be described below, but in these descriptions, points that are not particularly mentioned are the same as those in the first embodiment. In the drawings referred to below, the same elements as those in the first embodiment are given the same reference numerals.

[0075] Second embodiment 10 shows a packaging box 100 of a second embodiment. This packaging box 100 is a general-purpose case in which a pair of openings defined by a pair of side plates 111A, 111B and a pair of end plates 112A, 112B are closed by a top lid 115 and a bottom lid 116. The pair of side plates 111A, 111B and the pair of end plates 112A, 112B are provided with break lines 30 for breaking the packaging box 100 to the top lid 115 side and the bottom lid 116 side.

[0076] (Overview of the packaging box) The packaging box 100 shown in Fig. 10 is formed by folding a blank shown in Fig. 11 at a predetermined portion and fixing the predetermined portion. The blank is formed by punching a paper-made corrugated cardboard sheet with a well-known paper container punching device. In the packaging box 100 of this embodiment, the dimension in the length direction Y is set to 403 mm, the dimension in the width direction X is set to 303 mm, and the dimension in the height direction Z is set to 106 mm.

[0077] 10, a pair of side plates (first side plate portions) 111A, 111B are formed in a substantially identical rectangular shape and each extends along the YZ plane. A pair of end plates (second side plate portions) 112A, 112B are formed in a substantially identical rectangular shape and each extends along the XZ plane. Of these, end plate 112B includes end plate body 113 and attachment portion 114, which are attached (fixed) with, for example, a vinyl acetate emulsion adhesive.

[0078] The side plates 111A, 111B and the end plates 112A, 112B are arranged alternately and are continuous with each other via bent portions 120 extending in the height direction Z. Referring to Fig. 11, the attachment portion 114, the side plate 111A, the end plate 112A, the side plate 111B, and the end plate main body 113 are connected in this order from left to right. These are each connected with each other via a bent line 120a that constitutes the bent portion 120. The bent line 120a is a general-purpose crease.

[0079] After bending the side plate 111A relative to the end plate 112A, the end plate body 113 is bent relative to the side plate 111B, and the end plate body 113 is attached to the outer surface side of the attachment margin portion 114 (inner glue). As a result, the end plate body 113 and the attachment margin portion 114 are integrated as the end plate 112B. The attachment margin portion 114 may be connected to the end plate 112A or 112B and attached to the side plate body. The attachment margin portion 114 may also be attached to the outer surface side of the attachment target (outer glue).

[0080] 10, the top canopy (first plate portion) 115 and the bottom cover (second plate portion) 116 are formed in a generally identical rectangular shape, both extending along the XY plane and arranged at a distance in the height direction Z. Both the top canopy 115 and the bottom cover 116 (see FIG. 15) include a pair of inner flaps 117 arranged at a distance in the length direction Y, and a pair of outer flaps 118 arranged at a distance in the width direction X. The pair of outer flaps 118 are arranged on the outer surfaces of the pair of inner flaps 117, and are fixed by a predetermined adhesive, fastener, adhesive tape, or the like.

[0081] The pair of inner flaps 117 are rectangular in shape with their leading ends positioned in a straight line with the leading end of the outer flap 118 in the blank state shown in Fig. 11. The pair of outer flaps 118 are rectangular in shape with their leading ends butting against each other in the sealed state shown in Fig. 10. With reference to Figs. 10 and 15, the total of four (two pairs) inner flaps 117 are connected to the ends of the end plates 112A and 112B in the height direction Z via bent portions 121 extending in the width direction X. The total of four (two pairs) outer flaps 118 are connected to the ends of the side plates 111A and 111B in the height direction Z via bent portions 122 extending in the length direction Y.

[0082] 11, of the four inner flaps 117, two are connected to the top and bottom of end plate 112A via fold lines 121a that form fold portions 121, and the remaining two are connected to the top and bottom of end plate main body 113 via fold lines 121a. The four outer flaps 118 are connected to the top and bottom of side plates 111A and 111B via fold lines 122a that form fold portions 122. Both fold lines 121a and 122a are general-purpose creases and are arranged in a generally straight line.

[0083] (Break line structure for opening) 10, the break line 30 is made up of a plurality of cut lines, and breaks (separates) the packaging box 100 into the top cover 115 side and the bottom cover 116 side (see FIG. 15). Also referring to FIG. 11, the break line 30 includes a first portion 30A provided on each of the side plates 111A and 111B, and a second portion 30B provided on each of the end plates 112A and 112B. The packaging box 100 of the second embodiment does not include the third portion 30C (see FIG. 1) shown in the first embodiment.

[0084] Similar to the first embodiment, the first portion 30A includes a pair of first breaking portions 31A, 31B, one second breaking portion 32, and a pair of third breaking portions 33A, 33B. In addition, the first portion 30A is provided with one operating portion 34 so as to include the third breaking portion 33A on the left side of the center in the longitudinal direction Y when viewed from a direction facing the side plates 111A, 111B.

[0085] 10 and 11, the second portion 30B of the second embodiment is provided in a central region when the end plates 112A, 112B are divided into approximately three equal parts in the height direction Z, and is provided at the same height position as the first portion 30A. The second portion 30B has the same basic configuration as the first portion 30A, and includes a pair of first breaking portions (fourth breaking portions) 41A, 41B, one second breaking portion (fifth breaking portion) 42, and a pair of third breaking portions (sixth breaking portions) 43A, 43B. The first portion 30A and the second portion 30B are different in that the dimensions of the second breaking portions 32, 42 are different, but are basically the same in other respects.

[0086] Specifically, when viewed from the direction facing the end plates 112A, 112B, the first breaking portion 41A and the third breaking portion 43A are located to the left of the center in the width direction X, and the first breaking portion 41B and the third breaking portion 43B are located to the right of the center in the width direction X. In addition, the second portion 30B is provided with one opening operation portion (hereinafter abbreviated as "operation portion") 44 to include the third breaking portion 43A, to the left of the center in the width direction X, when viewed from the direction facing the end plates 112A, 112B.

[0087] The pair of first breakable portions 41A, 41B are provided at both ends in the width direction X of the end plates 112A, 112B, and each extends from the outer side to the center in the width direction X. The dimension of each of the first breakable portions 41A, 41B in the width direction X is the same as the dimension of each of the first breakable portions 31A, 31B of the first portion 30A in the length direction Y.

[0088] The outer end of the first breaking portion 41A in the width direction X is disposed at a breakable interval from the outer end of the first breaking portion 41B in the length direction Y of the first breaking portion 41B of the first portion 30A. The outer end of the first breaking portion 41B in the width direction X is disposed at a breakable interval from the outer end of the first breaking portion 41A in the length direction Y of the first breaking portion 41A of the first portion 30A. The inner ends of the first breaking portions 41A, 41B in the width direction X are disposed at a breakable interval from the third breaking portions 43A, 43B.

[0089] The first breakage portions 41A, 41B are configured by a one-sided zipper including a plurality of first cut lines spaced apart in the width direction X and second cut lines continuing to the first cut lines. For the end plate 112B, the cut lines constituting the first breakage portion 41B are provided on the end plate body 113 and the attachment portion 114. The second breakage lines are inclined toward the second breakage portion 42 side (the bottom cover 116 side) as they move away from the continuous first cut lines.

[0090] The first breakage portions 41A, 41B are inclined from the center side in the width direction X outward toward the second breakage portion 42 side (bottom lid 116 side). The angle between the first breakage portions 41A, 41B and the bottom lid 116 (fold line 121a) is the same as the angle between the first breakage portions 31A, 31B of the first portion 30A and the bottom lid 116 (fold line 122a). The angle between the first breakage portions 31A, 31B of the first portion 30A and the bottom lid 116 is the same as the angle α in the first embodiment.

[0091] The second breaking portion 42 is provided on the bottom cover 116 side with a gap from the pair of first breaking portions 41A, 41B. The second breaking portion 42 is provided between the first breaking portions 41A, 41B and extends in the width direction X. In FIG. 10, the end of the second breaking portion 42 located on the left side is arranged with a breakable gap from the third breaking portion 43A, and the end of the second breaking portion 42 located on the right side is arranged with a breakable gap from the third breaking portion 43B. The second breaking portion 42 is made of a plurality of cut lines arranged with a gap in the width direction X so as to form a perforation, and extends linearly from one end to the other end. However, the shape of the second breaking portion 42 can be changed as necessary.

[0092] The third breaking portions 43A, 43B are provided between the pair of first breaking portions 41A, 41B and the single second breaking portion 42. Each of the third breaking portions 43A, 43B is formed of a plurality of cut lines provided at intervals allowing breaking. The dimension of each of the third breaking portions 43A, 43B in the width direction X is the same as the dimension of each of the third breaking portions 33A, 33B of the first portion 30A in the length direction Y.

[0093] The third breaking portion 43A is connected to the inner end of the first breaking portion 41A in the width direction X and the left end of the second breaking portion 42. The third breaking portion 43B is connected to the inner end of the first breaking portion 41B in the width direction X and the right end of the second breaking portion 42. "Connected" is not limited to a configuration in which they are connected in the strict geometric sense, but includes a configuration in which they are spaced apart by a distance that allows them to be broken.

[0094] Similar to the third break portion 33A of the first portion 30A, the third break portion 43A is curved with a predetermined curvature, has a center located on the upper side (top cover 115 side) and curves downward (toward bottom cover 116 side). Similar to the third break portion 33B of the first portion 30A, the third break portion 43B is formed in a straight line sloping downward to the left.

[0095] The operating portion 44 is provided to include only the third breaking portion 43A of the pair of third breaking portions 43A, 43B, and is inclined toward the center in the width direction X from the first breaking portion 41A side to the second breaking portion 42 side. Specifically, the operating portion 44 is defined by the third breaking portion 43A, a cut line 45 continuing to the outer end of the third breaking portion 43A, and a fold line 46 continuing to the inner end of the third breaking portion 43A. However, the operating portion 44 may be an opening formed by punching.

[0096] The cut line 45 is provided on the canopy 115 side of the third breaking portion 43A of the end plates 112A, 112B, and is composed of two (multiple) cutting lines provided at a breakable interval. The cut line 45 is curved with a predetermined curvature, with its center located on the lower side (the bottom cover 116 side) and curved upward (toward the canopy 115). The cut line 45 is connected to the outer end of the third breaking portion 43A and extends toward the center in the length direction Y. The dimension of the cut line 45 in the width direction X is the same as the dimension of the cut line 35 of the first portion 30A in the length direction Y.

[0097] The fold line 46 is a general-purpose line that is inclined from the upper side (the first breaking portion 41A side) to the lower side (the second breaking portion 42 side) toward the center in the longitudinal direction Y. The angle between the fold line 46 and the bottom cover 116 is the same as the angle between the fold line 36 of the first portion 30A and the bottom cover 116. The angle between the fold line 36 of the first portion 30A and the bottom cover 116 is the same as that in the first embodiment (angle β).

[0098] Next, an example of a method for opening the packaging box 100 thus configured will be described.

[0099] First, in Fig. 10, the operating portion 34 of the side plate 111B is pushed inward from the outside in the width direction X to open the operating portion 34, and the operating portion 34 is operated upward to the right side toward the canopy 115 in Fig. 10. As a result, as shown in Fig. 12, the side plate 111B is broken along the first breaking portion 31A and the second breaking portion 32 that are connected to the operating portion 34 in the first portion 30A of the breaking line 30. Furthermore, when breaking of the side plate 111B along the second breaking portion 32 is completed, the side plate 111B is subsequently broken in the order of the third breaking portion 33B and the first breaking portion 31B.

[0100] Next, in Fig. 12, the operating portion 44 of the end plate 112B is pushed inward from the outside in the width direction X to open the operating portion 44, and the operating portion 44 is operated upward to the right side toward the canopy 115 in Fig. 12. As a result, as shown in Fig. 13, the end plate 112B is broken along the first breaking portion 41A and the second breaking portion 42 that are connected to the operating portion 44 in the second portion 30B of the breaking line 30. Furthermore, when breaking of the end plate 112B along the second breaking portion 42 is completed, the end plate 112B is subsequently broken in the order of the third breaking portion 43B and the first breaking portion 41B.

[0101] Next, as shown in Fig. 14, the operating part 34 of the side plate 111A is operated in the same manner as above to break the side plate 111A, and then the operating part 44 of the end plate 112A is operated in the same manner as above to break the end plate 112A. This separates the packaging box 100 into the top cover 115 side and the bottom cover 116 side, and the bottom cover 116 side can be opened in a tray-like state as shown in Fig. 15.

[0102] The order in which the side plates 111A, 111B and the end plates 112A, 112B are broken can be changed as necessary. When one of the side plates 111A, 111B or the end plates 112A, 112B is broken, the edge portion between the adjacent one of the side plates 111A, 111B or the end plates 112A, 112B may be broken in the same manner as in the first embodiment.

[0103] The packaging box 100 thus constructed has the following features.

[0104] The packaging box 100 is a general-purpose case in which the side plates 111A, 111B and the end plates 112A, 112B are difficult to break by forming the overall height low, but the side plates 111A, 111B are provided with a first portion 30A having a pair of first breaking portions 31A, 31B, one second breaking portion 32, a pair of third breaking portions 33A, 33B, and one operating portion 34, and the end plates 112A, 112B are provided with a second portion 30B having a pair of first breaking portions 41A, 41B, one second breaking portion 42, a pair of third breaking portions 43A, 43B, and one operating portion 44. Therefore, the rigidity of the packaging box 100 can be ensured, and the long and thin side plates 111A, 111B and the end plates 112A, 112B can be reliably broken along the breaking line 30.

[0105] The operating portion 34 of the side plates 111A, 111B is formed to the left of the center in the length direction Y, and the operating portion 44 of the end plates 112A, 112B is formed to the left of the center in the width direction X. Therefore, when opening the packaging box 100 along the breaking line 30, it is possible to do so while rotating the packaging box 100 in one direction, for example, thereby improving the ease of opening.

[0106] The present invention is not limited to the configurations of the above-described embodiments, and various modifications are possible.

[0107] For example, the packaging box 1 of the first embodiment may not have the third portion 30C. The packaging box 100 of the second embodiment may have the same third portion 30C as the first embodiment.

[0108] The fracture line 30 may include a first portion 30A having the first fracture portions 31A, 31B, the second fracture portion 32, and the third fracture portions 33A, 33B in only one (e.g., 13A, 111A) of the pair of side plates 13A, 13 and 111A, 111B, and the other (e.g., 13B, 111B) may have a fracture line structure different from that of the first portion 30A. Also, only one (e.g., 112A) of the pair of end plates 112A, 112B may have a second portion 30B having the first fracture portions 41A, 41B, the second fracture portion 42, and the third fracture portions 43A, 43B, and the other (e.g., 112B) may have a fracture line structure different from that of the second portion 30B.

[0109] The first breakage portions 31A, 31B, 41A, and 41B may be disposed on the lower side in the height direction Z, and the second breakage portions 32 and 42 may be disposed on the upper side in the height direction Z.

[0110] The packaging box 1,100 is not limited to a paper corrugated cardboard sheet, but may be formed of a single layer of thick paper. Also, the packaging box 1,100 is not limited to a rectangular parallelepiped (hexahedron), but may be a polyhedron with chamfered edges at predetermined positions. [Explanation of symbols]

[0111] 1...Packaging box 10…Tabletop (first plate) 11…Bottom plate (second plate part) 13A, 13B...Side plate (first side plate part) 14…Side panel body 15…Accessory section 16...Lid part (second side plate part) 17…Inner flap 18…Outer flap 20...Bending part 20a...Folding line 21...Bending part 21a...Folding line 22...Bending part 22a...Folding line 23...Bending part 23a...Folding line 30…Break line 30A…1st part 30B…Second part 30C…3rd part 31A, 31B…First breakage portion 31a...Outer edge 31b…Inner end 31c…1st cutting line 31d…Second cutting line 32…Second break 32a...first end 32b…Second end 32c…1st cutting line 32d…Second cutting line 33A, 33B…Third breakage section 33a…outside edge 33b…Inner end 34...Opening operation section 35…Cutting line 35a…Outer end 35b…Inner end 36…Fold line 36a…outside edge 36b…Inner end 37...1st cutting line 38a, 38b…Second cutting line 41A, 41B...First break portion (fourth break portion) 42...Second breakage part (fifth breakage part) 43A, 43B...Third break portion (sixth break portion) 44...Opening operation section 45…Cutting line 46…Fold line 100...Packaging box 111A, 111B...Side plate (first side plate part) 112A, 112B...End plate (second side plate part) 113...End plate body 114…Attached section 115…Canopy (first plate) 116…Bottom cover (second plate part) 117…Inner flap 118…Outer flap 120...Bending part 120a…Folding line 121...Bending part 121a...Folding line 122...Bending part 122a...Folding line X width direction (first direction) Y Length direction (second direction) Z Height direction (third direction)

Claims

1. A first plate portion extending in a first direction and a second direction intersecting the first direction; a second plate portion provided at an interval from the first plate portion in a third direction intersecting both the first direction and the second direction; a first side plate portion connected to the first plate portion and the second plate portion and extending in the second direction and the third direction; a second side plate portion connected to the first plate portion and the second plate portion and extending in the first direction and the third direction; a break line provided on the first side plate portion and the second side plate portion for breaking the first side plate portion and the second side plate portion into a break line on the first side plate portion and a break line on the second side plate portion; Equipped with A first portion of the break line formed on the first side plate portion, A pair of first breakage portions extending from the outer side to the center side in the second direction; a second break portion disposed between the pair of first break portions and extending in the second direction and spaced apart from the pair of first break portions in the third direction; a pair of third breakage portions each connected to a central end of each of the pair of first breakage portions in the second direction and an end of the second breakage portion located near these ends; an opening operation portion provided on only one side of the pair of third breaking portions and inclined toward the center in the second direction from the first breaking portion side toward the second breaking portion side in the third direction; having The first break portion is a plurality of first cutting lines spaced apart in the second direction; a second cutting line that is continuous with an outer end of the first cutting line in the second direction and is inclined toward the second fracture portion in the third direction as it moves away from the continuous first cutting line; A zipper closure is provided. A packaging box, wherein the first breaking portion is inclined overall from a center side in the second direction toward an outer side toward the second breaking portion in the third direction.

2. The opening operation unit includes: a third break portion on said one side; A cut line that is connected to an outer end of the third break portion on one side in the second direction and extends toward the center in the second direction; a fold line having an end adjacent to an end on a center side in the second direction of the cut line and an end adjacent to an end on a center side in the second direction of the third breaking portion on one side, the fold line being inclined toward the center side in the second direction from the first breaking portion side toward the second breaking portion side in the third direction; 2. The packaging box of claim 1, defined by:

3. The first side plate portion is provided as a pair spaced apart in the first direction, The second side plate portion is provided as a pair spaced apart in the second direction, Each of the pair of second side plate portions has a pair of inner flaps connected to the pair of first side plate portions, respectively, and a pair of outer flaps connected to the first plate portion and the second plate portion, respectively, and disposed outside the inner flaps, the break line has the first portion provided on each of the pair of first side plate portions and a second portion formed on each of the pair of second side plate portions, The second portions are provided on the inner flaps so as to extend in the first direction. The packaging box according to claim 1 or 2.

4. The second portion is provided at a distance from the first break portion in the third direction, The break line has a third portion adjacent to both the first break portion and the second portion at a ridge between the first side plate portion and the inner flap and extending in the third direction. The packaging box according to claim 3.

5. The first side plate portion is provided as a pair spaced apart in the first direction, the second side plate portion has a dimension in the first direction smaller than a dimension in the second direction of the first side plate portion, and is provided as a pair with a space therebetween in the second direction, the break line has the first portion provided on each of the pair of first side plate portions and a second portion formed on each of the pair of second side plate portions, The second portion is A pair of fourth breakage portions extending from the outer side to the center side in the first direction; a fifth break portion that is spaced apart from the pair of fourth break portions in the third direction, is located between the pair of fourth break portions, and extends in the first direction; a pair of sixth breakage portions connected to ends of the pair of fourth breakage portions on the center side in the first direction and ends of the fifth breakage portion located near these ends; an opening operation portion provided to include only one side of the pair of sixth breaking portions and inclined toward the center in the first direction from the fourth breaking portion side toward the fifth breaking portion side; The packaging box according to claim 1 or 2, comprising:

6. The packaging box according to claim 5 , wherein, when viewed from a direction directly facing the second side plate portion, the opening operation portion formed on the second side plate portion is located to the left of a center in the first direction.

7. The packaging box according to claim 1 , wherein, when viewed from a direction directly facing the first side plate portion, the opening operation portion formed on the first side plate portion is located to the left of the center in the second direction.

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