JP2019094070A - Packing box - Google Patents

Abstract

To provide a packing box which can be easily opened in display in a store, and in which reduction of good appearance due to a loading load in a physical distribution step hardly occurs.SOLUTION: The packing box is configured so that, a top surface plate 1, a back surface plate 2, a bottom surface plate 3 and a front surface plate 4 wrap a commodity, back side flaps 8, front side flaps 9, top side flaps 6 and bottom side flaps 7 are folded to a side surface, the bottom side flaps 7, the back side flaps 8 and the front side flaps 9 are adhered, the top side flaps 6 and the front side flaps 9 are adhered, and the bottom side flaps 7 are overlapped to outside of the front side flaps 9. The front side flaps 9 on both side surfaces have a breakage line 13 going to a boundary with the front surface plate 4 in an area in which the bottom side flaps 7 overlap, the front surface plate 4 has a breakage line 14 continuous from the breakage line 13, and in opening, the breakage lines 13, 14 are broken, and with the breakage line 14 of the front surface plate 4 as a shaft, an upper lid part B is rotated to a lower tray part A.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a packaging box which is opened by breaking along a breaking line, and displays and takes out a packaged product.

  2. Description of the Related Art In recent years, in the distribution industry, packaging boxes capable of displaying products in a state of being stored are required. As a packaging box which meets such a demand, what is shown in Drawing 6 in the following patent documents 1 is indicated.

  In the packaging box, the front plate 52 is connected to the top plate 51, and the bottom plate 54 and the front receiving plate 55 are sequentially connected to the back plate 53. The top plate 51 and the front plate 52 are connected to both sides. A structure including the side flaps 56 and the front side flaps 57, and the back side flaps 58 and the bottom side flaps 59 connected respectively on both sides of the back plate 53 and the bottom plate 54, and the connecting piece 60 connected to the front end of the bottom side flaps 59 It has become.

  And in the state before opening, the breaking line which forms the outline of the opening shape 61 of the inverted trapezoidal shape where the top plate 51 and the back plate 53 are located near the boundary center part and the breaking line 62 extending from the both sides to the upper corner It is connected via

  Further, a perforated breaking line 63 is inserted in the front receiving plate 55 so as to form a section downward from near the central portion of the front end edge, and the inside region thereof is a cutout portion 64 having a reverse trapezoidal shape. .

When assembling this packaging box, using a dedicated caser, the front support plate 55, the pair of bottom side flaps 59 and the back plate 53 are erected from the bottom plate 54, and the connection piece 60 is adhered to the front support plate 55. Bonding by 65, connecting the front receiving plate 55 and the bottom flap 59, bending the back flap 58 forward, bonding the back flap 58 and the bottom flap 59 by the bonding portion 66, and forming the tray portion forming a a _1, housing the product inside the tray portion a _1.

Next, the top plate 51 is bent forward sequentially from the back plate 53, the front plate 52 downward from the top plate 51, the front flap 57 is bent backward from the front plate 52, and the top flap 56 downward from the top plate 51. bent, does not adhere to the back side flap 58 and the top side flaps 56, to bond the front flap 57 and the top side flap 56 by the adhesive portion 67 to form a lid portion B _1.

Then, by adhering with an adhesive portion 67 in the region of the front support plate 55 and front plate 52 and the cutout 64, and the tray portion A ₁ and the lid portion B ₁ is a sealed state of being fixed.

  Further, when the product is heavy, the bottom flap 59 and the front flap 57 are bonded at the bonding portion 68 through the portion in which the varnish for suppressing the adhesion is subbed.

On the other hand, at the time of product display at the storefront, the opening start portion 61 is pushed in and a finger is inserted, and the rear part of the top plate 51 is pulled forward so as to pull up the tear line 62. Accordingly, the cut portion 64 cut away from the front support plate 55 with sticky state to the front plate 52, since the tray portion A ₁ and the lid portion B ₁ is separated, the lid portion from the tray portion A ₁ B _{The 1} can be removed to expose the goods.

  In addition, in Patent Document 2 below, a wrap round type packaging box as shown in FIG. 7 is described. The packaging box includes a top plate 71, a back plate 72, a bottom plate 73, and a front plate 74, which are sequentially connected, and is provided on the top flap 75 and the bottom flap 76 respectively on both sides of the top plate 71 and the bottom plate 73. And a back flap 77 and a front flap 78 respectively connected on both sides of the back plate 72 and the front plate 74. Then, the top plate 71, the back plate 72, the bottom plate 73 and the front plate 74 are bent so as to wrap the product, and the passage 79 at one end thereof is adhered to the other end, and the back flap 77 and the front flap 78 The top flap 75 and the bottom flap 76 are folded and bonded so as to be folded to the side and to overlap the outside.

  The top plate 71 is provided with a pair of unsealing start parts 80 by cutting at the center, and a broken line 81 curved in an S-shape is provided from the unsealing start part 80 to both side surfaces. The breaking line 81 is in the form of a zipper in which a wedge-shaped cut is interrupted.

  In the top flap 75, a vertical breaking line 82 is inserted continuously from the breakage line 81 of the top plate 71, and in the front flap 78, a horizontal direction located between the top flap 75 and the bottom flap 76. The broken line 83 is inserted. The back plate 72 is provided with a broken line 84 which is inclined downward and inward from the upper ends on both sides and the middle portion is horizontal, and the front plate 74 is continued to the broken line 83 of the front flap 78 A horizontally extending break line 85 is included.

In such a packaging box, the broken line 81, 82, 83 is broken by putting a finger on the opened opening start portion 80 and twisting and turning the top plate 71 in opposite directions, and further, the broken line 84, when the break 85, the tray portion a ₂ and separated into a pair of cover portions B _2, from the tray portion a ₂ by removing the cover portion B _2, it is possible to expose the product.

JP, 2015-107831, A JP, 2015-110446, A

  By the way, although the packaging box described in the above-mentioned patent documents 1 can break easily and can open a breaking line 62, when storing and sealing goods, a special caser is needed, and the use on a construction is limited. And lack of versatility.

  Moreover, although the packaging box described in the said patent document 2 can be assembled using a general wrap round caser at the time of packaging of goods, it is difficult to break the tearing line 82, 83 simultaneously at the time of opening, When a large load is applied in the vertical direction during the distribution process, there is a problem that buckling occurs along the horizontal breaking line 83 and the appearance is easily lost.

  Therefore, the present invention is intended to provide a packaging box which can be easily opened at the time of display at a shop front and the like, and a reduction in aesthetic appearance due to loading load and the like in the physical distribution process does not easily occur.

In order to solve the above problems, the present invention comprises a top plate, a back plate, a bottom plate and a front plate, and at least the back plate, the bottom plate and the front plate are connected, and the sky side is provided on both sides of the top plate and bottom plate. The flap and the bottom flap are connected in series, and the back flap and the front flap are connected on both sides of the back plate and the front plate,
The top plate, the back plate, the bottom plate and the front plate are arranged to wrap the product, the back flap and the front flap are folded to the side, the top flap and the bottom flap are folded to the side, and the bottom flap and In a packaging box in which a back flap and a front flap are bonded, a top flap and a front flap are bonded, and a bottom flap overlaps the outside of the front flap,
An opening start portion is provided in any part of the region from the top plate to the back plate, and a break line from the opening start portion to the edge of both side surfaces is entered,
The front flaps on both sides have a break line towards the border with the front plate in the area where the top or bottom flaps overlap
The front plate has a broken line continuously from the broken line of the front flaps on both sides,
When unsealing, pull from the unsealing start part to break the breaking line on both sides and the breaking line of the front flap, and rotate the upper lid part with respect to the lower tray part with the breaking line of the front plate as the axis The break line of the front plate is broken to remove the lid portion.

  Moreover, in the packaging box which puts a hand on the edge of a top board, and opens it, the tearing-off line which goes to the edge of an opening start part and the both sides from the above-mentioned structure shall be omitted.

  In addition, in order to improve the openability, the broken line of the front flap is inclined downward toward the boundary with the front plate.

  Furthermore, in the front flaps on both sides, a notch is formed at the edge facing the back flap in the region where the top flap or the bottom flap overlaps.

Further, the broken line of the front plate has an inclined portion directed downward from the boundary with the front flaps on both sides, and a hinge portion sandwiched between the inclined portions on both sides,
At the time of opening, the break line of the front flap is broken and the sloped part of the break line of the front plate is broken, with the hinge of the break line of the front plate as the axis and the lid part above the lower tray part. The lid portion is removed by rotating and breaking the hinge portion.

  In addition, the breaking line from the opening start part to the edge of both sides shall reach the upper end corner of both sides along the boundary of the top plate and the back plate and wrap the breaking line into the top flap and the back flap It was possible to open the container without putting it in the bag, and the reduction in strength was suppressed.

  In addition, the top flap should be an inclined edge that is cut diagonally upward from the lower end of the portion overlapping the back flap toward the back side, and when sealing the top flap is adhered to the back flap Even if not, the top flap does not lift from the back flap, and the friction between the top flap and the back flap at the time of opening is reduced.

  In addition, an opening auxiliary line shall be inserted so as to extend obliquely inward in the tensile direction from the vicinity of the outer end of the break line on both sides of the opening start part, and when opening from the opening start part It bends so that the vicinity rises along the auxiliary line, so that the force in the breaking direction is efficiently applied to the breaking lines on both sides of the opening start portion.

  In the packaging box according to the present invention, since the bottom flap overlaps the outside of the break line of the front flap located at the side in the assembled state, the break line of the side is broken even if a large load is applied during the distribution process. It is less prone to buckling along with maintaining aesthetics.

  In addition, when the notch is provided in the front flaps on both sides, the break line of the front flap connected to the notch is inclined, and the incline and the hinge are provided in the break line of the front plate. The fracture is induced from the notch of the front flap to the fracture line, and the inclination direction of the fracture line of the front flap and the existence of the bevel of the fracture line of the front plate cause the fracture direction along with the rotation of the lid around the hinge. Forces act efficiently on these break lines.

  And since the hinge part is broken later than the inclined parts on both sides without breaking the breaking line of the front plate at one time, it can be opened stepwise gradually without being pulled too strongly in an instant, and the display at the store Work load is reduced.

The figure which shows the blank of the packaging box which concerns on embodiment of this invention. The figure which shows the sealing state of the packaging box same as the above A perspective view showing the same opening process The same perspective view showing the opened state The perspective view which shows the sealing state of the modification same as the above The perspective view which shows the opening process of the packaging box of patent document 1 The perspective view which shows the opening process of the packaging box of patent document 2

  Hereinafter, embodiments of the present invention will be described based on the attached drawings.

  This packaging box is a wrap-round type cardboard box and is assembled from a blank as shown in FIG. 1, and as shown in FIG. 2, a large number of paper packs P containing beverages such as milk (12 in the illustration) ) It is a package to put together.

  In this blank, the top plate 1, the back plate 2, the bottom plate 3 and the front plate 4 are sequentially provided in series, and the passage 5 is provided continuously on the opposite side of the top plate 1 to the back plate 2 The part is provided with a window 1a for inspection and cold air introduction. A top side flap 6 and a bottom side flap 7 are respectively provided in a row on both sides of the top plate 1 and the bottom plate 3, and a back side flap 8 and a front side flap 9 are continued on both sides of the back plate 2 and the front plate 4. It is set up.

  The top plate 1, the back plate 2, the bottom plate 3 and the front plate 4 may be joined at any ridge portion by the passage 5 when they are bent in a square tube shape at the time of assembly.

  In the vicinity of the central portion of the boundary between the top plate 1 and the back plate 2, a breaking line is inserted to the back plate 2, and the inside region thereof is made into the open start portion 10 of inverted trapezoidal shape. The breaking lines on both sides of the outline of the opening start portion 10 are of a zipper type in which a wedge-shaped cut is interrupted.

  Then, with both ends of the opening start portion 10 as starting points, the broken lines 11 are inserted along the boundary between the top plate 1 and the back plate 2 to reach the groove bottom between the top flap 6 and the back flap 8 ing. The breaking line 11 is a zipper type in which a wedge-shaped cut is interrupted.

  In the front flaps 9 on both sides, in the area where the bottom flap 7 overlaps during assembly, a triangular notch 12 whose width narrows back is formed at the edge facing the back flap 8, and the notch 12 , And a break line 13 directed to the boundary with the front plate 4 continuously. The breaking line 13 is inclined toward the boundary with the front plate 4 in the downward direction at the time of assembly, and is a zipper type in which a hook-like cut is interrupted.

  In addition, although the broken line 13 exemplifies the thing inclined overall, it is good also as what is combined with the horizontal part and that only one part inclines.

  The front plate 4 has a breaking line 14 continuously inserted from the breaking line 13 of the front flaps 9 on both sides, and the breaking line 14 is inclined to the bottom plate 3 side from the front flap 9 at the time of assembly. It comprises a portion 14 a and a hinge portion 14 b which is interposed between the portion 14 a and parallel to the boundary with the bottom plate 3. The inclined portion 14a is a zipper type in which a wedge-shaped cut is interrupted, and the hinge portion 14b is cut and interrupted in creases and cuts.

  Moreover, the lower end edge of the part which overlaps with the back side flap 8 at the time of the assembly of the top side flap 6 is made into the inclined edge 6a cut diagonally upward toward the back side.

  Further, the top panel 1 is provided with an opening assisting line 15 which extends obliquely inward in the tensile direction from the vicinity of the outer end of the breaking line 11 on both sides of the opening start portion 10. The opening auxiliary line 15 is a crease formed by pressing the cardboard from the back side.

  In this blank, the hot melt adhesive is applied at the back side of the bottom flap 7 at the positions where the hot melt adhesive is applied for side formation at the time of assembly. It is considered to be a bonding portion 18 which is close to the end.

  When assembling the blank as described above and packaging the product, as shown in FIG. 2, the top plate 1, the back plate 2, the bottom plate 3 and the front plate 4 are bent in a square tube shape to make a large number of products. Wrap the paper pack P, fold the passage 5 downward, and bond it to the top of the front plate 4. As a result, the large number of paper packs P are held so as to be tightened.

  Next, the back flap 8 and the front flap 9 are bent to the side, and the top flap 6 and the bottom flap 7 are bent to the side so as to overlap the outside, and the bottom flap 7 and the back flap 8 and the front flap 9 And the top flaps 6 and the front flap 9 are bonded by the bonding portion 18 while bonding the bonding portions 16 and 17 together.

  In the sealed state assembled in this manner, the lower portion of the back plate 2, the bottom plate 3 and the front plate 4 from the broken line 14 and the lower portion of the bottom flap 7, the back flap 8 and the front flap 9 from the broken line 13 The tray portion A is constituted, and the lid portion B is constituted by a portion above the break line 14 of the top plate 1 and the front plate 4 and a portion above the break line 13 of the top flap 6 and the front flap 9. The opening start unit 10 is attached to the lid portion B.

  Such an assembly process can be performed by a general-purpose lap round caser, and there is no need to introduce a dedicated box-making facility.

  Further, since the opening start portion 10 faces the center of the boundary between the top plate 1 and the back plate 2 and the break lines 11 on both sides extend along the boundary between the top plate 1 and the back plate 2 There is no need to wrap around the side flaps 6 or the back side flaps 8 and a reduction in strength against a load on the stack or a drop in the distribution process is suppressed.

  In addition, even if a large load is applied in the distribution process, since the break line 13 of the front flap 9 located on the side is inclined, the front flap 9 is less likely to be bent against the vertical load, and the break line 13 Since the bottom side flap 7 overlaps with the outside, the outward expansion of the front side flap 9 is suppressed by the bottom side flap 7, and buckling does not easily occur along the broken line 13.

  In addition, since the lower end edge of the top flap 6 is the inclined edge 6a, the top flap 6 may be lifted or drown from the back flap 8 even if the top flap 6 is not bonded to the back flap 8. Upswing is prevented and aesthetics are maintained.

  On the other hand, at the time of opening for display at the storefront, as shown in FIG. 3, the opening start portion 10 is pushed in, a finger is inserted, and the tear line 11, 13 is pulled by pulling the front side to pull up the rear of the top plate 1. It is made to fracture | rupture and then the inclination part 14a of the fracture line 14 of the front plate 4 is fractured. Then, along with this, with the hinge portion 14b of the broken line 14 as an axis, the upper lid portion B is rotated forward with respect to the lower tray portion A.

  At this time, the rear portion of the top plate 1 is bent so as to rise along the opening auxiliary line 15 along with the pulling-up from the opening start portion 10, so the force in the breaking direction on the broken lines 11 on both sides of the opening start portion 10 is efficient. The break line 11 can be easily broken.

  Further, fracture is induced from the notch 12 of the front flap 9 to the inclined fracture line 13, and the fracture line 13 of the front flap 9 and the front plate 4 are fractured with the rotation of the lid portion B around the hinge 14b. The force in the breaking direction efficiently acts on the inclined portion 14a of the line 14, and the breaking line 13 and the inclined portion 14a of the breaking line 14 sandwiching the ridge portion break continuously.

  In addition, since the top flap 6 and the back flap 8 are not adhered in the sealed state, the broken line 11, 13 and the inclined portion 14a of the broken line 14 are easily broken to make the lid portion B the hinge portion 14b. It can be rotated about an axis.

  Further, since the lower end edge of the top flap 6 is obliquely cut so as to be the sloped edge 6a, the friction between the top flap 6 and the back flap 8 is reduced when the lid portion B is rotated.

  Thereafter, when the hinge portion 14b of the broken line 14 is broken and the lid portion B is removed, the remaining tray portion A is largely opened from the top surface to the front surface, as shown in FIG. The paper pack P can be displayed in an exposed state for easy viewing. Also, a consumer who wants to purchase a product can easily take out the paper pack P.

  Moreover, in this display state, the back plate 2 and the back flap 8 are standing up to the rear of the paper pack P with the upper end remaining, so when the paper pack P located at the front is taken out, the rear The phenomenon that the paper pack P located at is shaken and falls to the rear or side is prevented.

  And since the hinge part 14b is later cut off from the inclined part 14a of both sides without breaking the breaking line 14 of the front plate 4 at the time of the said opening, opening is not carried out momentarily too much, either. The burden of the display work at the shop front can be reduced.

  In addition, after opening, since it is separated into the tray part A and the lid part B of substantially the same size, the adhesion at the adhesive parts 16, 17, 18 is peeled off, and the tray part A and the lid part B are disassembled flat. Can be easily disposed of.

  In the above embodiment, the end edges of the back flap 8 and the front flap 9 are butted against each other in the sealed state, and the side is completely closed. However, the properties of the product, the packaging cost, etc. are taken into consideration. Also, as shown in FIG. 5, the dimensions of the back flap 8 and the front flap 9 may be set short so that a gap is opened between the tip edges of the back flap 8 and the front flap 9.

  Further, a manual notch 19 is provided at the opposing edge of the back flap 8 and the front flap 9, the dimension of the top flap 6 is set short, and the middle edge of the top flap 6 facing the manual notch 19 In carrying, when holding a hand, it may be bent to provide a gripping piece 19a for preventing a finger from hitting the edge of the corrugated board.

  In addition, when the deterioration in strength is not considered to be a problem, the opening start portion 10 may be provided in any part of the region from the top plate 1 to the back plate 2, and the breaking line 11 is on the top side Through the flap 6 or the back flap 8 it may be directed towards its edge.

  Further, the broken line 13 of the front flap 9 may be inserted not in the area where the bottom flaps 7 overlap but in the area where the top flaps 6 overlap.

  Moreover, although the wrap round type packaging box was illustrated in the said embodiment, the top plate 1 and the top side flap 6 of the both sides, the back plate 2, the bottom plate 3 and the front plate 4 and the back flap 8 of the both sides The bottom flap 7 and the front flap 9 may be separated, and the top flap 6 may be attached to the front flap 9 at the time of assembly to form a tray lidar type structure.

  Further, the edge which is opened by putting a hand on the open side edge of the top plate 1, the top plate 1 is divided into one connected to the back plate 2 and the one connected to the front plate 4, and the edge facing the divided portion It may be opened by holding the hand. In this case, in addition to the passage 5, it is possible to omit the opening start portion 10 and the broken line 11 extending from the both sides toward the end edge of the both sides.

1 top plate 1a window 2 back plate 3 bottom plate 4 front plate 5 passage 6 top side flap 6a sloped edge 7 bottom side flap 8 back side flap 9 front side flap 10 opening start part 11 tearing line 12 notch 13 and 14 breaking line 14a Inclined part 14b Hinge part 15 opening auxiliary line 16, 17, 18 Bonding part 19 Manual notch 19a Gripping piece 19a
A tray part B lid part P paper pack

Claims (8)

A top plate (1), a back plate (2), a bottom plate (3) and a front plate (4), at least the back plate (2), the bottom plate (3) and the front plate (4) are connected Top side flaps (6) and bottom side flaps (7) are continuously provided on both sides of the face plate (1) and the bottom plate (3), and back sides of the back plate (2) and the front plate (4) are provided. Side flaps (8) and front flaps (9) are connected in series;
The top plate (1), the back plate (2), the bottom plate (3) and the front plate (4) are arranged to wrap the product, and the back flap (8) and the front flap (9) are bent to the side, The top flap (6) and the bottom flap (7) are folded to the side to bond the bottom flap (7) to the back flap (8) and the front flap (9), and 6) In the packaging box in which the front flap (9) is bonded and the bottom flap (7) overlaps the outside of the front flap (9),
The opening start portion (10) is provided in any part of the region from the top plate (1) to the back plate (2), and the break line (11) from the opening start portion (10) to the edge of both sides Is put,
In the front flaps (9) on both sides, in the area where the top flap (6) or the bottom flap (7) overlaps, a break line (13) towards the border with the front plate (4)
In the front plate (4), a breaking line (14) is inserted continuously from the breaking line (13) of the front flap (9) on both sides,
When unsealing, pull from the unsealing start part (10) to break the broken lines (11) on both sides and the broken lines (13) of the front flap (9), and the broken lines (14) of the front plate (4) Rotating the upper lid portion (B) with respect to the lower tray portion (A) on the shaft to break the broken line (14) of the front plate (4) to remove the lid portion (B) Characteristic packaging box. A top plate (1), a back plate (2), a bottom plate (3) and a front plate (4), at least the back plate (2), the bottom plate (3) and the front plate (4) are connected Top side flaps (6) and bottom side flaps (7) are continuously provided on both sides of the face plate (1) and the bottom plate (3), and back sides of the back plate (2) and the front plate (4) are provided. Side flaps (8) and front flaps (9) are connected in series;
The top plate (1), the back plate (2), the bottom plate (3) and the front plate (4) are arranged to wrap the product, and the back flap (8) and the front flap (9) are bent to the side, The top flap (6) and the bottom flap (7) are folded to the side to bond the bottom flap (7) to the back flap (8) and the front flap (9), and 6) In the packaging box in which the front flap (9) is bonded and the bottom flap (7) overlaps the outside of the front flap (9),
In the front flaps (9) on both sides, in the area where the top flap (6) or the bottom flap (7) overlaps, a break line (13) towards the border with the front plate (4)
In the front plate (4), a breaking line (14) is inserted continuously from the breaking line (13) of the front flap (9) on both sides,
When unsealing, pull from the edge of the top plate (1) to break the broken line (13) of the front flap (9), with the broken line (14) of the front plate (4) as the axis, lower tray part A packaging box characterized by rotating the upper lid portion (B) with respect to (A) and breaking the broken line (14) of the front plate (4) to remove the lid portion (B).   The packaging box according to claim 1 or 2, wherein the broken line (13) of the front flap (9) is inclined downward toward the boundary with the front plate (4). .   The packaging box according to any of the preceding claims, wherein the front flaps (9) on both sides are in the region where the top flap (6) or the bottom flap (7) overlaps the back flap (8). A notch (12) is formed at the edge facing the), and a break line (13) extending from the notch (12) to the boundary with the front plate (4) is inserted continuously Packaging box. The packaging box according to any one of claims 1 to 4, wherein the broken line (14) of the front plate (4) has a slope (14a) directed downward from the boundary with the front flap (9) on both sides And hinges (14b) sandwiched between the inclined parts (14a) on both sides,
At the time of opening, the breaking line (13) of the front flap (9) is broken, and the sloped part (14a) of the breaking line (14) of the front plate (4) is broken, and the broken line of the front plate (4) 14) Rotate the upper lid part (B) with respect to the lower tray part (A) with the hinge part (14b) as the axis to break the hinge part (14b) and remove the lid part (B) A packaging box characterized by   The packaging box according to claim 1, wherein the breaking line (11) from the opening start portion (10) to the end edge of both sides is the upper end of both sides along the boundary between the top plate (1) and the back plate (2). A packaging box characterized by reaching a corner.   The packaging box according to any one of claims 1 to 6, wherein the top flap (6) is a sloped edge where the lower end edge of the portion overlapping the back flap (8) is obliquely cut upward toward the back side A packaging box characterized by (6a).   The packaging box according to claim 1 or 6, wherein the opening assisting line (15) extends diagonally inward in the tensile direction from the vicinity of the outer end of the break line (11) on both sides of the opening start part (10). Packaging box characterized by being put.

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