JP2020093802A - Cutting line and packaging box with the same - Google Patents

Abstract

To provide a cutting line which can be easily cut by folding one surface of a packaging box.SOLUTION: In a cutting line 17, a plurality of cut lines 20 and a plurality of seams 25 are alternately arranged for cutting one surface of a packaging box 1. The plurality of cut lines 20 are arranged in a wavy-form in which a centerline CL when folding the one surface is set as the center. The plurality of seams 25 include a plurality of outer seams 26 arranged away from the centerline CL in an amplitude direction. In a state in which the one surface is folded, the outer seams 26 are broken, or weakened to be easily broken.SELECTED DRAWING: Figure 4

Description

The present invention relates to a cutting line in which a plurality of cut lines and a plurality of seams are alternately arranged to cut one surface of a packaging box, and a packaging box including the cutting line.

The cardboard packaging box described in Patent Document 1 includes a top surface, a bottom surface, a pair of long side surfaces, and a pair of short side surfaces. A first separation reservation line diagonally intersecting the center line and a pair of second separation reservation lines extending from both ends of the first separation reservation line toward the short side surface are formed on the top surface. .. A fifth separation reserved line linearly extending in the longitudinal direction is formed on each long side surface. The first, second and fifth separation reserved lines are so-called zippers. When opening the packaging box, the user puts the thumbs of both hands in the vicinity of the center of the top surface and pulls (turns) both hands away from each other. Then, the top surface is cut along the first and second separation reservation lines. Then, the user cuts the pair of long side surfaces along the pair of fifth separation reservation lines.

JP, 2015-110446, A

In the packaging box described in Patent Document 1, the user can grasp the top surface with both hands and pull in opposite directions, so that the top surface can be cut relatively easily. However, in order to cut the long side surface along the linear fifth reserved line, it was necessary to confirm the cutting direction of the zipper and cut it carefully. Further, since the joint between the cuts of the fifth separation reserved line is not broken by only bending the long side once, the long side is easily cut along the fifth separation reserved line with a small force. I couldn't. In order to easily cut the long side surface with the fifth separation reservation line, for example, the long side surface must be folded and returned many times to sufficiently weaken (the joint of) the fifth separation reservation line. It was

In order to solve the above problems, the present invention provides a cutting line that can be easily cut by bending one surface of a packaging box and a packaging box including the cutting line.

In order to achieve the above-mentioned object, the present invention is a cutting line in which a plurality of cut lines and a plurality of seams are alternately arranged for cutting one surface of the packaging box, and the plurality of cut lines are formed by bending the one surface. Arranged in a wavy form around the center line when, the plurality of seams includes a plurality of outer seams arranged at positions apart in the amplitude direction orthogonal to the center line with respect to the center line, The outer seam breaks or is weakened to facilitate breakage when one side is folded.

In this case, it is preferable that the plurality of joints include a plurality of inner joints arranged on the center line, and the inner joints are not broken when the one surface is bent.

In this case, the cut line is a cut line body formed in a curved shape or a straight line shape, and the side of the center line or the center line from the end portion of the cut line body located in the amplitude direction from the center line. And an outer cut portion extending toward the opposite side, and an angle formed by the cut main body and the outer cut portion is a right angle or an obtuse angle.

In other cases, the cut is a cut body formed in a curved line or a straight line, and the opposite side beyond the center line from the end contacting the center line of the cut body, or the side of the cut body. And an inner cut portion extending toward the inner cut portion, and the angle formed by the cut main body and the inner cut portion is a right angle or an obtuse angle.

Further, in other cases, the cut line is a cut line body formed in a curved shape or a straight line shape, and the end of the cut line body at a position distant from the center line in the amplitude direction from the center line side or the center line side. An outer cut portion extending toward the side opposite to the line, and an opposite side beyond the center line from the end portion of the cut body that is in contact with the center line, or extending toward the side of the cut body. It is preferable that an angle formed between the cut main body and the outer cut portion and an angle formed between the cut main body and the inner cut portion are right angles or obtuse angles.

Further, in this case, the pair of outer cut portions that are adjacent to each other with the outer seam interposed therebetween extend in opposite directions, and the pair of inner cut portions that are adjacent to each other with the inner seam interposed extend in opposite directions. It is preferably provided.

Further, in this case, it is preferable that the outer seam is disposed at a position farthest from the center line in the wavy amplitude direction.

In order to achieve the above-mentioned object, the packaging box of the present invention is formed with the cutting line described in any one of the above on the one surface.

Further, in order to achieve the above-mentioned object, the packaging box of the present invention has an opening at one end surface, a plurality of trays arranged in a line, and a lid that closes the openings of the plurality of trays. , And the cutting line according to any one of the above is formed along the boundary between the adjacent trays.

According to the present invention, it is possible to easily cut by bending one surface of the packaging box.

It is a perspective view which shows the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the tray of the packaging box which concerns on 1st Embodiment of this invention. It is a top view which shows the blank of the lid of the packaging box which concerns on 1st Embodiment of this invention. It is a top view which expands and shows a part of cutting line concerning a 1st embodiment of the present invention. It is a perspective view which shows the state which assembled the tray of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the assembly process of the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the process of dividing the packaging box which concerns on 1st Embodiment of this invention. It is a perspective view which shows the lid body bent by the cutting line concerning a 1st embodiment of the present invention from diagonally back. It is a perspective view which shows the lid body bent by the cutting line concerning a 1st embodiment of the present invention from diagonally forward. It is a perspective view showing the state where the packaging box concerning a 1st embodiment of the present invention was divided. It is a perspective view which shows the packaging box which concerns on 2nd Embodiment of this invention. It is a top view which shows the blank of the packaging box which concerns on 2nd Embodiment of this invention. It is a top view showing a cutting line concerning a 2nd embodiment of the present invention. It is a perspective view which shows the state which opened the packaging box which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the state which folded the packaging box which concerns on 2nd Embodiment of this invention by the cutting line. It is a perspective view showing the state where the packaging box concerning a 2nd embodiment of the present invention was divided. It is a top view which expands and shows a part of cutting line which concerns on 3rd Embodiment of this invention. It is a top view which expands and shows a part of cutting line concerning a 4th embodiment of the present invention. It is a top view which expands and shows a part of cutting line based on 5th Embodiment of this invention. It is a top view which expands and shows a part of cutting line which concerns on the 1st modification of 1st Embodiment of this invention. It is a top view which expands and shows a part of cutting line which concerns on the 2nd modification of 1st Embodiment of this invention. It is a top view which expands and shows a part of cutting line which concerns on the 5th modification of 1st Embodiment of this invention. It is a top view which expands and shows a part of cutting line which concerns on the 6th modification of 1st Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates " “Up” and “D” indicate “down”. The front-rear direction is orthogonal to the left-right direction, and the up-down direction is orthogonal to the front-rear direction and the left-right direction. In the present specification, terms indicating directions and positions are used, but those terms are used for convenience of description and do not limit the technical scope of the present invention.

[First Embodiment: Outline of Packaging Box]
The configuration of the packaging box 1 will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing a packaging box 1. FIG. 2 is a plan view showing the blank 5 of the tray 1T of the packaging box 1. FIG. 3 is a plan view showing the blank 6 of the lid 1L of the packaging box 1.

As shown in FIG. 1, the packaging box 1 is formed in a generally short rectangular parallelepiped shape. The packaging box 1 is a box (hereinafter, also referred to as “tray lidder”) sealed by closing the upper surface openings 1A of the three trays 1T with one lid 1L. The three trays 1T are juxtaposed in a row in the left-right direction and are connected to each other. Each tray 1T has an upper surface opening 1A (see FIG. 5) on the upper end surface (one end surface) thereof, and a plurality of contents (not shown) are accommodated therein. The lid 1L spans the three trays 1T and closes the upper surface openings 1A of the three trays 1T.

The tray 1T is formed by assembling the blank 5 shown in FIG. The lid 1L is formed by assembling the blank 6 shown in FIG. The blanks 5 and 6 are formed, for example, by punching out a single corrugated cardboard sheet made of paper with a punch or the like. The corrugated cardboard sheet is, for example, a double-sided corrugated cardboard sheet in which a front liner 9B and a back liner 9C (see FIG. 5) are bonded to the front and back of a corrugated center lining 9A. 2 and 3 show the front liner 9B side. In this specification, the direction parallel to the central corrugated board 9A of the corrugated board is referred to as the "step direction", and the direction orthogonal to the corrugated direction (the central cortex 9A) is referred to as the "flow direction". In the drawings, "X" indicates "step direction" and "Y" indicates "flow direction". Further, in the present specification, the terms “top (top)”, “bottom (bottom)” and the like refer to top (top), bottom (bottom) and this in a state (assembled state) of the packaging box 1. Refers to a concept similar to.

[Tray blank]
As shown in FIG. 2, the blank 5 of the tray 1T includes a bottom wall 10, a pair of side walls 11, a pair of upper inner flaps 12, a pair of lower outer flaps 13, and four side inner flaps 14. Contains.

<Bottom wall, side wall, upper inner flap>
The bottom wall 10, the pair of side walls 11, and the pair of upper inner flaps 12 are arranged in this order from the center in the step direction toward both outer sides. The bottom wall 10 is formed in a substantially rectangular shape that is longer in the flow direction than in the step direction. The pair of side walls 11 are connected to both ends of the bottom wall 10 in the step direction via the first folding curve L1. Each side wall 11 is formed in a substantially rectangular shape having substantially the same size as the bottom wall 10. The pair of upper inner flaps 12 are connected to both ends of the pair of side walls 11 in the step direction through the first folding curve L1. Each upper inner flap 12 is formed in a substantially rectangular shape slightly shorter than the side wall 11 in the flow direction. The stepwise dimension (extended dimension) of each upper inner flap 12 is set to be half or less of the stepwise dimension of the bottom wall 10.

<Lower outer flap, inner flap>
The pair of lower outer flaps 13 are connected to both ends of the bottom wall 10 in the flow direction via the second folding curve L2. Each lower outer flap 13 is formed in a substantially trapezoidal shape whose width is slightly narrowed from the bottom wall 10 side toward the tip. The dimension of each lower outer flap 13 in the flow direction (extension dimension) is set to approximately half the dimension of the side wall 11 in the step direction. The four inner side flaps 14 are continuously provided at both ends in the flow direction of the pair of side walls 11 via the second folding curve L2. Each side inner flap 14 is formed in a substantially rectangular shape, and the dimension (extension dimension) in the flow direction thereof is set to be substantially the same as the extension dimension of the lower outer flap 13.

[Blank of lid]
As shown in FIG. 3, the blank 6 of the lid 1L includes three ceiling walls 15 and six upper outer flaps 16.

<Ceiling wall>
The three ceiling walls 15 are arranged in a row in the step direction, and are continuously arranged via a cutting line 17. Each top wall 15 has substantially the same size as the bottom wall 10 and is formed in a substantially rectangular shape that is longer in the flow direction than in the step direction. Although details will be described later, the cutting line 17 is configured by arranging a plurality of cut lines 20 at intervals in the flow direction.

<Upper and outer flaps>
The six upper outer flaps 16 are connected to both ends of the three ceiling walls 15 in the flow direction via the third folding curve L3. Further, the upper outer flaps 16 adjacent to each other in the step direction are continuously provided via the zipper 18. Each upper outer flap 16 is formed in a substantially rectangular shape, and the dimension (extension dimension) in the flow direction thereof is set to be substantially the same as the extension dimension of the lower outer flap 13. A notch 16</b>A is recessed along the zipper 18 at the tip ends of the upper outer flaps 16 adjacent to each other in the step direction.

The first to third folding curves L1 to L3 are general ruled lines obtained by crushing the corrugated board sheet linearly in the thickness direction from the back liner 9C side. The general-purpose ruled line has a function of bending the corrugated cardboard sheet so that the back liner 9C faces inward. The above-mentioned first to third folding curves L1 to L3 are not limited to general ruled lines, but may be any line for bending a corrugated cardboard sheet, such as lead ruled lines having a plurality of cuts formed at predetermined intervals on the general ruled line. It may be one.

The zipper 18 extends from both ends of the pair of cutting lines 17 toward both sides in the flow direction. The zipper 18 is formed by arranging a plurality of cuts formed in a substantially Y shape at intervals in the flow direction. The cut of the zipper 18 formed near the cut portion 16A is formed in a straight line.

The cutting line 17 and the zipper 18 have a function of cutting the lid 1L (one surface of the packaging box). Specifically, the cutting line 17 is formed to separate the ceiling walls 15 adjacent to each other in the step direction. The zipper 18 is formed to separate the upper outer flaps 16 adjacent to each other in the step direction. That is, the lid 1L is divided into three by being cut along the cutting line 17 and the zipper 18.

[Cut line]
Next, the cutting line 17 will be described with reference to FIG. FIG. 4 is a plan view showing a part of the cutting line 17 in an enlarged manner.

The cutting line 17 is configured by arranging a plurality of cuts 20 and a plurality of seams 25 alternately in the flow direction. The cut 20 is formed by penetrating a blade in the thickness direction of the corrugated board sheet. The seam 25 is a seam between the cuts 20.

<Cutting>
The plurality of cuts 20 are arranged in a wavy shape around the center line CL when the lid 1L (one surface) is bent. The center line CL passes through the center of vibration of the wave and extends along the flow direction. The plurality of cuts 20 are arranged at intervals on a trajectory of a substantially sine wave that vibrates in the step direction (the amplitude direction orthogonal to the center line CL). The plurality of cuts 20 are arranged so as to go back and forth every two center lines CL. That is, one wavelength is formed by the four cuts 20.

<Seam>
The plurality of joints 25 include a plurality of outer joints 26 and a plurality of inner joints 27. The plurality of outer joints 26 are arranged at positions apart from the center line CL in the step direction (the amplitude direction orthogonal to the center line CL). The plurality of inner seams 27 are arranged on the center line CL. The outer seam 26 is arranged at a position farthest from the center line CL in the wavy step direction (amplitude direction). That is, the outer seam 26 is arranged at a position corresponding to the peak of the amplitude. In addition, "the inner seam 27 is arranged on the center line CL" does not mean that the inner seam 27 exactly coincides with the center line CL, and the inner seam 27 is slightly displaced from the center line CL. It means to allow that.

<Details of cuts>
Next, the details of each cut 20 will be described with reference to FIG. 4. Each cut 20 includes a cut body 21, an outer cut portion 22, and an inner cut portion 23.

(Cut body)
The cut main body 21 is formed in a curved shape that is convex on the side opposite to the center line CL. A pair of cut main bodies 21 adjacent to each other on one side in the step direction with the center line CL as a boundary are inclining so that both ends in the flow direction are in contact with the center line CL and are separated from the center line CL in the step direction as they approach each other.

(Outer notch)
The outer cut portion 22 extends from an end portion located at a position away from the center line CL of the cut body 21 in the step direction (amplitude direction) toward the center line CL side or the opposite side to the center line CL. .. The outer cut 22 is formed in a straight line, and the angle formed between the cut main body 21 and the outer cut 22 is an obtuse angle. The above-described outer seam 26 is formed between a pair of adjacent outer cut portions 22. Although the tip of the outer cut portion 22 bent toward the center line CL is in contact with the center line CL, it may be separated from the center line CL, or may intersect so as to cross the center line CL. You may have.

(Inner cut)
The inner cut portion 23 extends from the end portion in contact with the center line CL of the cut body 21 to the opposite side beyond the center line CL or toward the cut body 21 side. The inner cut portion 23 is formed in a straight line, and the angle formed by the cut main body 21 and the inner cut portion 23 is an obtuse angle. The above-mentioned inner seam 27 is formed between the pair of inner cut portions 23 adjacent to each other. The center line CL is set so as to connect the intersection of the cut main body 21 and the inner cut portion 23.

The outer cut portion 22 and the inner cut portion 23, which are connected to one cut body 21, are bent on the same side. That is, when the outer cut 22 is bent toward the center line CL, the inner cut 23 is bent on the opposite side beyond the center CL. On the other hand, when the outer cut portion 22 is bent on the side opposite to the center line CL, the inner cut portion 23 is bent on the cut body 21 side so as to bounce at the center line CL. As shown in FIG. 3, the cuts 20 (cut main body 21) located at both ends of the cutting line 17 are linearly formed along the center line CL. Further, the outer cut portion 22 is omitted in the cut 20 and only the inner cut portion 23 that is bent in a direction away from the center line CL is formed. Further, in the cut 20 (cut main body 21) adjacent to the cut 20 on the right end in FIG. 3, the outer cut 22 and the inner cut 23 are bent on opposite sides.

Further, as shown in FIG. 4, the cut 20 in which the outer and inner cut portions 22 and 23 are bent toward the center line CL, and the cut 20 in which the outer and inner cut portions 22 and 23 are bent toward the side opposite to the center line CL. 20 and 20 are arranged alternately in the flow direction. The pair of outer cut portions 22 that are adjacent to each other with the outer joint 26 interposed therebetween extend (bend) in directions opposite to each other and are formed substantially parallel to each other. The pair of inner cut portions 23 that are adjacent to each other with the inner joint 27 interposed therebetween are extended (bent) in directions opposite to each other and are formed substantially parallel to each other.

[Assembling the packaging box]
Next, a process of assembling the packaging box 1 will be described with reference to FIGS. 1, 5 and 6. FIG. 5 is a perspective view showing a state where the tray 1T is assembled. FIG. 6 is a perspective view showing an assembling process of the packaging box 1. The packaging box 1 may be manually assembled by an operator, or may be automatically or semi-automatically assembled by a box making machine. Here, a case where an operator assembles the packaging box 1 will be described as an example.

First, the assembly process of the tray 1T will be described with reference to FIG. The worker turns the back liner 9C of the blank 5 (see FIG. 2) upward, and bends (rises) the pair of side walls 11 at a substantially right angle along the first folding curve L1. Subsequently, the worker bends the four inner side flaps 14 inward along the second folding curve L2. Next, the operator folds (raises) the pair of lower outer flaps 13 along the second folding curve L2 and puts the lower outer flaps 13 on the side inner flaps 14 via an adhesive (for example, hot melt or the like). To glue.

As described above, the tray 1T having the upper surface opening 1A is completed (see FIG. 5). The operator puts the contents into the tray 1T through the top opening 1A and arranges the contents on the bottom wall 10. After that, the operator bends the pair of upper inner flaps 12 inward to close a part of the upper surface opening 1A (see FIG. 6). Further, the worker repeats the same procedure as above to assemble the three trays 1T. In the above description, the contents are stored in the assembled tray 1T, but the assembly process of the tray 1T is not limited to this. For example, the tray 1T may be assembled by first placing the contents on the bottom wall 10 and then bending the side wall 11, the lateral flap 14, etc. so as to wrap the contents.

Next, as shown in FIG. 6, the operator arranges the three trays 1T in the left-right direction with the side walls 11 in contact with each other. At this time, the adjacent side walls 11 are bonded to each other via an adhesive. The adjacent side walls 11 may not be bonded to each other.

Subsequently, the operator covers the three trays 1T with the lid 1L (blank 6) with the front liner 9B facing upward. At this time, the lid 1L is arranged on the three trays 1T so that the two cutting lines 17 (zippers 18) formed on the lid 1L are along the boundary between the adjacent trays 1T. Further, the three ceiling walls 15 of the lid 1L are adhered to the upper inner flaps 12 of the three trays 1T via an adhesive.

Next, the operator bends the six upper outer flaps 16 along the third folding curve L3 and adheres the upper outer flaps 16 to the side inner flaps 14 of the tray 1T with an adhesive.

As described above, the top opening 1A of the tray 1T is closed by the lid 1L (top wall 15), and the packaging box 1 is sealed (see FIG. 1). That is, the assembly of the packaging box 1 is completed. In the first embodiment, the adhesive is used to fix the lower outer flap 13 and the side inner flap 14 and the tray 1T and the lid 1L. However, instead of the adhesive, an adhesive tape or the like is used. You may use.

[Packing box division]
Next, a process of dividing the packaging box 1 will be described with reference to FIGS. 7 to 9. FIG. 7 is a perspective view showing a process of dividing the packaging box 1. FIG. 8A is a perspective view showing the lid 1L bent along the cutting line 17 from diagonally behind. FIG. 8B is a perspective view showing the lid 1</b>L bent along the cutting line 17 from diagonally forward. FIG. 9 is a perspective view showing a state where the packaging box 1 is divided.

Since two cutting lines 17 are formed on the lid 1L along the boundary between the trays 1T adjacent to each other, by cutting the lid 1L along the cutting lines 17, the packaging box 1 is divided into three parts. can do. Here, a case will be described in which one tray 1T located at the right end, one top wall 15 and the like are separated (divided).

First, as shown in FIG. 7, the operator pivots the lid 1L upward about the cutting line 17 (center line CL) while peeling one tray 1T from another adjacent tray 1T. (Bend). At this time, the upper outer flap 16 adhered to one tray 1T is cut along the zipper 18 from the lower end upward, and is separated from the upper outer flap 16 adhered to the other tray 1T. The tray 1T and the top wall 15 are bent about 90 degrees along the center line CL. The bending angle of the tray 1T and the top wall 15 may be less than 90 degrees or 90 degrees or more (less than 180 degrees).

As described above, the inner seam 27 is arranged on the center line CL (see FIG. 4). Therefore, as shown in FIGS. 8A and 8B, in the state where the lid 1L (one surface) is bent around the center line CL, the inner seam 27 only bends and does not break. To be precise, depending on the thickness of the corrugated board sheet, the back liner 9C may be torn because the bent portion is longer on the outside than on the inside. That is, "the inner seam 27 does not break" means that the inner seam 27 is not completely broken, and a part of the outer seam 26 (the back liner 9C or the like) is allowed to break. Means to do.

Further, since the cutting line 17 (cutting body 21) is formed in a wavy shape (see FIG. 4 ), in the process of bending the lid 1L around the center line CL, the wavy peak portion (or valley portion) of the ceiling wall 15 is formed. ) Will enter the inside of the tray 1T. At this time, the mountain portion (or the valley portion) of the ceiling wall 15 bites into the inside of the tray 1T while cutting the outer seam 26 located away from the center line CL. Therefore, the outer joint 26 is broken when the lid 1L (one surface) is bent around the center line CL. Also, the outer seam 26 may not be completely ruptured and may be weakened to facilitate rupture. Note that "the outer seam 26 is weakened so as to be easily broken" means that, for example, the middle shin 9A (a part thereof) and the back liner 9C are left while leaving the front liner 9B (a part of the outer seam 26). Etc. means that most of the outer seam 26 breaks.

As described above, in the state where the lid 1L is bent at a substantially right angle, one top wall 15 is connected to another adjacent top wall 15 by a plurality of inner seams 27 (FIG. 8A and See FIG. 8B).

Next, as shown in FIG. 9, the worker pulls the folded top wall 15 in a direction of separating it from the other top walls 15 to break the inner seam 27. As a result, one tray 1T, one ceiling wall 15 and the like are separated (divided) from other trays 1T and the like. The packaging box 1 can be divided into three by the same procedure as above. The separated tray 1T can be opened by peeling off the upper outer flap 16 and the ceiling wall 15 from the divided tray 1T (not shown).

In the cutting line 17 according to the first embodiment described above, the outer joint 26 is displaced from the center line CL in the wave amplitude direction (see FIG. 4 ). According to this configuration, when the lid body 1L (top wall 15) is bent at the cutting line 17 (center line CL), the force resulting from the deviation from the center line CL acts on the outer joint 26, and the entire outer joint 26 is Or most can be broken. As a result, the top walls 15 adjacent to each other with the cutting line 17 interposed therebetween are mainly connected to each other through the inner joints 27, and therefore, compared to the state where the ceiling walls 15 are connected to each other via the outer joints 26 and the inner joints 27. The lid 1L (top wall 15) can be easily cut with a small force.

By the way, in order to prevent unintended breakage of the seam 25 due to an impact during transportation, it is preferable to form the seam 25 long. If the outer cut portion 22 and the inner cut portion 23 do not exist, in order to cut the lid 1L along the cutting line 17, a seam is formed along the line connecting the ends of the pair of adjacent cut main bodies 21. 25 must be broken exactly. However, when the seam 25 is formed to be long, the breakage progresses due to derailment from the line connecting the ends of the pair of cut main bodies 21, and the lid 1L (top wall 15) may not be cut along the cutting line 17. .. On the other hand, in the cutting line 17 according to the first embodiment, the pair of outer cut portions 22 are formed so as to sandwich the outer joint 26, and the pair of inner cut portions 23 are formed so as to sandwich the inner joint 27 (Fig. 4). According to this configuration, the breaking direction of the seam 25 derailed from the line connecting the ends of the pair of cut main bodies 21 can intersect with the cut portions 22 and 23. Thereby, the breaking direction of the seam 25 can be returned to the side of the cut main body 21, and the seam 25 can be appropriately broken (or weakened).

In addition, in the cutting line 17 according to the first embodiment, the outer seam 26 is arranged near the apex of the wavy shape (see FIG. 4 ). According to this configuration, compared with the case where the outer seam 26 is arranged near the center line CL, the force generated in the outer seam 26 along with the bending of the lid 1L can be increased by the principle of leverage. This allows the outer seam 26 to be easily broken.

According to the packaging box 1 of the first embodiment, the tray 1T can be separated from the other trays 1T by bending the lid 1L along the cutting line 17 and then cutting the lid 1L. As a result, the tray 1T can be divided into small parts, so that only the tray 1T to be used can be separated and opened, and the unused tray 1T can be stored without opening.

In addition, in the packaging box 1 according to the first embodiment, the three trays 1T are arranged in parallel, but the present invention is not limited to this, and two or more trays 1T may be arranged in parallel. In addition, one or more cutting lines 17 may be formed on the lid 1L according to the number of boundaries between the adjacent trays 1T.

Further, in the packaging box 1 according to the first embodiment, the upper and lower flaps 16 of the lid 1L are continuously provided via the zipper 18, but the present invention is not limited to this. For example, instead of the zipper 18, a sewing line or a liner cut may be used, and any line may be used as long as it is a line for cutting a corrugated board sheet. Further, the zipper 18 may be omitted, and the six upper outer flaps 16 may be provided in a state of being separated from each other (not shown).

[Second Embodiment]
Next, the packaging box 2 according to the second embodiment will be described with reference to FIGS. 10 to 12. FIG. 10 is a perspective view showing the packaging box 2. FIG. 11 is a plan view showing the blank 7 of the packaging box 2. FIG. 12 is a plan view showing the cutting line 44. In the following description of other embodiments, the same or corresponding components as those of the packaging box 1 (cutting line 17) according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The packaging box 1 according to the first embodiment is a tray lidder in which three trays 1T arranged in a line are covered with one lid 1L, but the packaging box 2 according to the second embodiment has a top surface. It is a wrap-around case that is closed with a flap (see FIG. 10). The packaging box 2 is formed in a substantially tall rectangular parallelepiped shape as a whole. The packaging box 2 is formed by assembling the blank 7 shown in FIG.

As shown in FIG. 11, the blank 7 includes a bottom wall 30, a pair of side walls 31, a pair of ceiling walls 32, a pair of lower outer flaps 33, four side inner flaps 34, and four upper outer flaps. 35 and an unsealing structure 36.

<Bottom wall, side wall, ceiling wall>
The bottom wall 30, the pair of side walls 31, and the pair of ceiling walls 32 are arranged in a line in this order from the center in the step direction toward both outer sides. The bottom wall 30 is formed in a substantially rectangular shape that is longer in the flow direction than in the step direction. The pair of side walls 31 are connected to both end portions in the step direction of the bottom wall 30 via the third folding curve L3. Each side wall 31 is formed in a substantially rectangular shape that is longer than the bottom wall 30 in the step direction.

The pair of top walls 32 are connected to both ends of the pair of side walls 31 in the step direction via a third folding curve L3 (general-purpose ruled line). Each top wall 32 is formed in a substantially rectangular shape, and the dimension (extension dimension) in the step direction is set to be longer than half the dimension in the step direction of the bottom wall 10. The top wall 32 on one side (lower side in FIG. 11) is formed to have a slightly longer extension dimension than the other top wall 32. The tip side of one of the ceiling walls 32 is formed in a substantially trapezoidal shape whose width becomes narrower toward the tip. In addition, a pair of notches 32A are provided on the tip side of one of the top walls 32 at intervals in the flow direction.

<Lower outer flap, inner flap>
The pair of lower outer flaps 33 are continuously provided at both ends in the flow direction of the bottom wall 30 via the fourth folding curve L4 (general purpose ruled line). Each lower outer flap 33 is formed in a substantially rectangular shape, and its dimension in the flow direction (extension dimension) is set to approximately half the dimension in the step direction of the bottom wall 30. The four inner side flaps 34 are connected to both ends of the pair of side walls 31 in the flow direction via the fourth folding curve L4. Each side inner flap 34 is formed in a substantially rectangular shape, and the dimension (extension dimension) in the flow direction thereof is set to be substantially the same as the extension dimension of the lower outer flap 33.

<Upper and outer flaps>
The four upper outer flaps 35 are connected to both ends of the pair of ceiling walls 32 in the flow direction via the fourth folding curve L4. Each upper outer flap 35 is formed in a substantially quadrangular shape, and the dimension (extension dimension) in the flow direction thereof is set to be substantially the same as the extension dimension of the lower outer flap 33 and the like. The upper outer flap 35 is not formed at the tip portion of the ceiling wall 32 formed in a substantially trapezoidal shape, and one upper outer flap 35 is formed to have a stepwise dimension smaller than that of the other upper outer flap 35. There is.

<Opening structure>
As shown in FIG. 11, the unsealing structure 36 is formed over the bottom wall 30, the pair of side walls 31, and the pair of top walls 32 in order to divide the packaging box 2 into two. The unsealing structure 36 includes a pair of first zippers 41 formed on each ceiling wall 32, a pair of second zippers 42 formed on each side wall 31, a third zipper 43 formed on each side wall 31, and a bottom. A cut line 44 formed in the wall 30. In addition, since the pair of first zippers 41 formed in two sets are formed symmetrically with respect to the bottom wall 30, the pair of first zippers formed in one ceiling wall 32 will be described below unless otherwise specified. 41 will be described. For a reason similar to this, the pair of second zipper 42 and third zipper 43 formed on one side wall 31 will be described.

(1st zipper)
The pair of first zippers 41 extend substantially parallel to the step direction (fourth fold curve L4) on both sides of the ceiling wall 32 in the flow direction. The pair of notches 32A formed on the one ceiling wall 32 are formed at positions corresponding to the pair of first zippers 41. Each first zipper 41 is configured by arranging a plurality of cuts formed in a substantially L shape at intervals in the step direction. The pair of first zippers 41 has a function of cutting the top wall 32 from the tip toward the base end (side wall 31).

(2nd zipper)
The pair of second zippers 42 are extended in a substantially V shape so as to contact (intersect) each other from the ends of the pair of first zippers 41 toward the bottom wall 30. The crossed tip portions of the pair of second zippers 42 are located substantially at the center of the side wall 31 in the flow direction and slightly closer to the bottom wall 30 (lower side) than the center of the side wall 31 in the step direction. Each second zipper 42 is configured by arranging a plurality of cuts formed in a substantially L shape at intervals in the step direction. The pair of second zippers 42 has a function of cutting the side wall 31 from the tip (upper end) toward the bottom wall 30 (downward).

(3rd zipper)
The third zipper 43 extends substantially parallel to the step direction from the V-shaped tip of the pair of second zippers 42 to the third folding curve L3 (bottom wall 30). The third zipper 43 is configured by arranging a plurality of cuts formed in a substantially L shape at intervals in the step direction. In the third zipper 43, cuts bent in one direction of flow and cuts bent in the other direction of flow are alternately arranged. The third zipper 43 has a function of cutting the side wall 31 from the V-shaped tips of the pair of second zippers 42 toward the bottom wall 30.

(Cut line)
The cutting line 44 is formed so as to connect the tips of the pair of third zippers 43 formed on the pair of side walls 31. That is, the cutting line 44 is formed so as to cross the bottom wall 30. The cutting line 44 has substantially the same structure as the cutting line 17 according to the first embodiment. That is, as shown in FIG. 12, the cutting line 44 is configured by arranging the plurality of cuts 20 and the plurality of seams 25 alternately in the step direction. The plurality of cuts 20 are arranged in a wavy shape around the center line CL when the bottom wall 30 (one surface) is bent.

As shown in FIG. 12, the outer cut portion 22 and the inner cut portion 23, which are connected to one cut body 21, are bent on opposite sides. That is, when the outer cut portion 22 is bent toward the center line CL, the inner cut portion 23 is bent toward the cut body 21 side so as to bounce back at the center line CL. On the other hand, when the outer cut portion 22 is bent on the side opposite to the center line CL, the inner cut portion 23 is bent on the opposite side beyond the center line CL. The inner cut portion 23 is omitted in the cut 20 (cut body 21) located at both ends of the cutting line 44, and only the outer cut portion 22 bent in a direction away from the center line CL is formed. In the cut 20 (cut main body 21) adjacent to the cuts 20 at both ends, the outer cut 22 and the inner cut 23 are bent on the same side.

[Assembling the packaging box]
Next, a process of assembling the packaging box 2 will be described with reference to FIG. The worker turns the back liner 9C of the blank 7 (see FIG. 11) upward, folds the pair of side walls 31 along the third folding curve L3, and extends the four inner sides along the fourth folding curve L4. Fold flap 34 inward. Next, the worker bends the pair of lower outer flaps 33 along the fourth folding curve L4 and adheres them to the inner side flaps 34.

Next, the worker puts the contents into the bottom wall 30 through the opening on the top surface and arranges the contents on the bottom wall 30. Subsequently, the operator bends one (rear) top wall 32 inward along the third folding curve L3, and then folds the other (front) top wall 32 inward along the third folding curve L3. .. The front end portion of the front ceiling wall 32 overlaps the trapezoidal portion of the rear ceiling wall 32. Further, the worker bends the four upper outer flaps 35 downward along the fourth folding curve L4 and adheres them to the inner side flaps 34.

By the above, the packaging box 2 is sealed and the assembly of the packaging box 2 is completed. In the above description, the contents are stored in the packaging box 2 that is partially assembled, but the present invention is not limited to this, and the contents are first placed on the bottom wall 30, and then the side wall 31 and the inner side. The flap 34 and the like may be bent. Further, in the second embodiment, the tip portion of the front (other) top wall 32 overlaps with the trapezoidal portion of the rear (one) top wall 32, but the present invention is not limited to this, and the rear top wall 32 is not limited to this. The trapezoidal portion may overlap the front end portion of the top wall 32. That is, the trapezoidal portion of the rear ceiling wall 32 may be exposed on the upper surface. In the second embodiment, the adhesive is used to fix the lower outer flap 33 and the upper outer flap 35, but an adhesive tape or the like may be used instead of the adhesive.

[Splitting the packaging box (opening)]
Next, the process of dividing (opening) the packaging box 2 will be described with reference to FIGS. 13 to 15. The packaging box 2 is opened or divided into two parts by using the opening structure 36. FIG. 13 is a perspective view showing a state where the packaging box 2 is opened. FIG. 14 is a perspective view showing a state in which the packaging box 2 is folded back along the cutting line 44. FIG. 15 is a perspective view showing a state in which the packaging box 2 is divided.

First, the operator grasps and pulls up the front end portion of the front ceiling wall 32, and cuts the ceiling wall 32 along the pair of first zippers 41. Further, the worker grasps and cuts down the top wall 32 or the upper end of the front side wall 31 that has been cut, and cuts the front side wall 31 along the pair of second zippers 42. Then, as shown in FIG. 13, the operator removes a part of the top wall 32 and the side wall 31 cut along the first and second zippers 41, 42. Note that, as in the above, a part of the top wall 32 and the side wall 31 located at the rear is also cut and removed.

By the above, an opening is formed in the range surrounded by the first zipper 41 and the second zipper 42, and the packaging box 2 is opened (see FIG. 13 ). In addition, since the contents can be taken out from the opening in this state, the packaging box 2 may be used in this state (exhibition at a store, etc.) without being divided into two.

Next, the operator grips the ceiling wall 32 left on both the left and right sides of the opening and pulls the ceiling wall 32 to the left and right sides. Then, as shown in FIG. 14, the pair of side walls 31 is cut along the third zipper 43, and the bottom wall 30 is bent about 180 degrees along the cutting line 44 (center line CL). In a state where the bottom wall 30 (one surface) is bent around the center line CL, the inner seam 27 does not break, and the outer seam 26 breaks or is weakened so as to easily break. In this state, the bottom walls 30 are generally connected by the plurality of inner seams 27. The bending angle of the bottom wall 30 may be less than 180 degrees.

Next, as shown in FIG. 15, the worker pulls the folded back bottom wall 30 in the direction to separate it, breaks the inner seam 27, and divides one packaging box 2 into two.

According to the packaging box 2 (cutting line 44) according to the second embodiment described above, the bottom wall 30 is easily cut with a small force by bending the bottom wall 30 along the cutting line 44 and then cutting the bottom wall 30. It is possible to obtain the same action and effect as the packaging box 1 (cutting line 17) according to the first embodiment.

In the packaging box 2 according to the second embodiment, the tips of the pair of top walls 32 are formed to overlap each other, but the present invention is not limited to this. For example, the tips of the pair of ceiling walls 32 may be formed to abut against each other (not shown).

Further, in the packaging box 2 according to the second embodiment, the first to third zippers 41 to 43 are provided as the unsealing structure 36, but instead of these first to third zippers 41 to 43, a sewing machine wire is used. A liner cut or the like may be adopted.

In addition, in the cutting lines 17 and 44 according to the first and second embodiments, the outer cut portion 22 and the inner cut portion 23 connected to one cut body 21 are cut on the same side, and one cut 20 is formed. The outer cut portion 22 and the inner cut portion 23 connected to the cut main body 21 include the cut 20 bent to different sides, but the present invention is not limited thereto. For example, the cutting line may be configured only by the cut 20 in which the outer and inner cut portions 22 and 23 are bent on the same side, or the cut 20 in which the outer and inner cut portions 22 and 23 are bent on different sides. It may be configured by only (not shown).

[Third Embodiment]
Next, the cutting line 45 according to the third embodiment will be briefly described with reference to FIG. FIG. 16 is an enlarged plan view showing a part of the cutting line 45.

In the cutting line 45 according to the third embodiment, the cut main body 21 is formed in an inclined straight line shape. In this case, the plurality of cuts 20 are arranged at intervals on the trajectory of the substantially triangular wave. The plurality of cut lines 20 may be arranged on the orbit of the substantially rectangular wave at intervals (not shown). That is, the “wavy” formed by the plurality of cut lines 20 means a waveform such as a sine wave, a triangular wave, and a rectangular wave.

[Fourth Embodiment]
Next, the cutting line 46 according to the fourth embodiment will be briefly described with reference to FIG. FIG. 17 is an enlarged plan view showing a part of the cutting line 46.

In the cutting line 46 according to the fourth embodiment, the outer cut portion 50 and the inner cut portion 51 are formed in a curved shape. The outer cut portion 50 and the inner cut portion 51, which are adjacent to each other with the seam 25 interposed therebetween, are formed so as to form a substantially circular shape.

[Fifth Embodiment]
Next, the cutting line 47 according to the fifth embodiment will be briefly described with reference to FIG. FIG. 18 is a plan view showing a part of the cutting line 47 in an enlarged manner.

In the cutting lines 17 and 44 to 46 according to the first to fourth embodiments, one outer seam 26 is arranged near the apex of the corrugation, but in the cutting line 47 according to the fifth embodiment, two outer seams are provided. The seam 26 is arranged at a position displaced from the apex of the wavy shape. Specifically, the second cut 52 is formed between the pair of cuts 20 adjacent to each other on one side in the step direction with the center line CL as a boundary. At both ends of the second cut main body 53 of the second cut 52, a pair of outer cut portions 22 extending on the opposite side of the center line CL are continuously provided (extending on the side of the center line CL. May be.). Two outer joints 26 are formed between the pair of cut main bodies 21 and the second cut main body 53. In the cutting line 47 according to the fifth embodiment, four outer seams 26 are formed for each wavelength.

According to the cutting lines 45 to 47 (see FIGS. 16 to 18) according to the third to fifth embodiments described above, it is possible to easily cut one surface of the packaging boxes 1 and 2 with a small force. It is possible to obtain the same operation and effect as the cutting lines 17 and 44 according to the first and second embodiments. Further, the respective features of the cutting lines 45 to 47 according to the third to fifth embodiments may be combined with each other.

In addition, in the cutting line 17 according to the first embodiment, the outer cut portion 22 and the inner cut portion 23 are continuously provided to all the cut main bodies 21, but the present invention is not limited to this. For example, as shown in FIG. 19, the inner cut portion 23 may be omitted, and the cut 20 may include a cut main body 21 and an outer cut portion 22 (first modification). Further, for example, as shown in FIG. 20, the outer cut portion 22 may be omitted, and the cut 20 may include a cut main body 21 and an inner cut portion 23 (second modification). Even in these cases, the breaking direction of the outer or inner seam 26, 27 derailed from the line connecting the ends of the pair of cut main bodies 21 can be returned to the side of the cut main body 21, and the outer or inner seam 26, 27 can be appropriately formed. Can be broken.

In addition, if the contents of the packaging box 1 are light in weight or the transportation route is short, and the risk of breakage of the seam 25 due to impact during transportation is low, the outer cut line is cut. The portion 22 and the inner cut portion 23 may be omitted. That is, the cutting line 17 (cut 20) may be configured only by the cut main body 21 (third modification (not shown)). Further, the cut 20 including the outer and inner cut portions 22 and 23, the cut 20 including only the outer cut portion 22, the cut 20 including only the inner cut portion 23, and the cut 20 including only the cut main body 21 are defined as rules. They may be combined randomly or randomly (fourth modified example (not shown)).

Further, in the cutting line 17 according to the first embodiment, the inner seam 27 is provided on the center line CL, but the present invention is not limited to this. As shown in FIG. 21, the inner seam 27, the outer cut portion 22, and the inner cut portion 23 may be omitted, and the cut main body 21 may be formed so as to intersect the center line CL (fifth modified example). That is, the substantially S-shaped cut body 21 (cut 20) and the outer seam 26 (seam 25) may be arranged alternately. In this case, the lid 1L can be cut (or can be easily cut) simply by bending the lid 1L along the cutting line 17. Further, as shown in FIG. 22, the outer cut portion 22 may be provided continuously to the substantially S-shaped cut body 21 without omitting the outer cut portion 22 (sixth modified example).

The characteristics of the cutting line 17 according to the first to sixth modifications of the first embodiment described above may be applied to the cutting lines 44 to 47 according to the second to fifth embodiments (not shown). ).

In addition, in the cutting lines 17 and 44 to 47 according to the first to fifth embodiments (including modifications, the same applies below), the angle formed between the cut main body 21 (second cut main body 53) and the outer cut portion 22, The angle formed between the cut main body 21 (second cut main body 53) and the inner cut portion 23 is set to an obtuse angle, but the angle is not limited to this and may be set to a right angle (not shown).

Further, the packaging boxes 1 and 2 according to the first to fifth embodiments are formed of paper double-sided corrugated sheets, but the present invention is not limited to this. For example, the corrugated cardboard sheet may be a single-sided corrugated sheet in which a liner is attached to one side of the middle shin 9A, or a double-sided corrugated sheet in which a single-sided corrugated sheet is attached to a double-sided corrugated sheet. Further, for example, the packaging box 1 may be formed of cardboard, a resin plate, or the like, instead of the paper cardboard sheet.

The above description of the embodiment shows one aspect of the cutting line according to the present invention and a packaging box including the same, and the technical scope of the present invention is not limited to the above embodiment.

1, 2 Packaging box 1T Tray 1L Lid 17,44-47 Cutting line 20 Cut 21 Cut main body 22,50 Outer cut 23,51 Inner cut 25 Seam 26 Outer seam 27 Inner seam 52 Second cut 53 Second cut Body (cut body)
CL center line

Claims (9)

A cutting line (17, 44 to 47) in which a plurality of cuts (20, 52) and a plurality of seams (25) are alternately arranged to cut one surface of the packaging box,
The plurality of cuts are arranged in a wavy shape around a center line (CL) when the one surface is bent,
The plurality of seams includes a plurality of outer seams (26) arranged at positions apart from each other in the amplitude direction orthogonal to the centerline with respect to the centerline,
A cutting line, wherein the outer seam is broken or weakened so as to be easily broken in a state where the one surface is bent. The plurality of seams includes a plurality of inner seams (27) disposed on the centerline,
The cutting line according to claim 1, wherein the inner seam is not broken when the one surface is bent. The cut is
A cut body (21, 53) formed in a curved shape or a straight shape,
An outer cut portion (22, 50) extending from the end portion of the cut main body at a position distant from the center line in the amplitude direction toward the side of the center line or a side opposite to the center line, Including,
The cutting line according to claim 1, wherein an angle formed by the cut main body and the outer cut portion is a right angle or an obtuse angle. The cut is
A cut body (21, 53) formed in a curved shape or a straight shape,
An inner cut portion (23, 51) extending toward the opposite side of the cut body from the end portion in contact with the center line, or the side of the cut body,
The cutting line according to claim 2, wherein an angle formed by the cut main body and the inner cut portion is a right angle or an obtuse angle. The cut is
A cut body (21, 53) formed in a curved shape or a straight shape,
An outer cut portion (22, 50) extending from the end portion of the cut main body in a position distant from the center line in the amplitude direction toward the side of the center line or a side opposite to the center line;
An inner cut portion (23, 51) extending toward the opposite side of the cut body from the end portion in contact with the center line, or the side of the cut body,
The cutting line according to claim 2, wherein an angle formed by the cut main body and the outer cut portion and an angle formed by the cut main body and the inner cut portion are right angles or obtuse angles. The pair of outer cut portions adjacent to each other across the outer seam are extended in opposite directions,
The cutting line according to claim 5, wherein the pair of inner cut portions that are adjacent to each other with the inner seam sandwiched therebetween extend in directions opposite to each other. The cutting line according to any one of claims 1 to 6, wherein the outer seam is arranged at a position farthest from the center line in the wavy amplitude direction. A packaging box, wherein the cutting line according to any one of claims 1 to 7 is formed on the one surface. A plurality of trays (1T), each of which has an opening on one end surface and are arranged in parallel in a row;
A lid (1L) for closing the openings of the plurality of trays,
A packaging box, wherein the lid is provided with the cutting line according to any one of claims 1 to 7 along a boundary between the trays adjacent to each other.

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