JP7184684B2 - Packaging box, blank sheet for packaging box, and package - Google Patents

Description

The present invention relates to an easily openable packaging box, a blank sheet for the packaging box, and a package.

In the prior art, a packaging box which has a substantially rectangular parallelepiped shape and whose height is lower than the length of the short sides of the top and bottom faces has a long side (extended in the long side direction) as a structure for opening. In some cases, a linear breaking line extending in the direction of the long side is provided on the side surface on which it is present. When such a packaging box is assembled with a wrap-around caser, etc., or when a load is applied to the top surface, there is a problem that the linear break line provided on the long surface portion unintentionally bends. was occurring. Moreover, in this packaging box, there is a problem that the force for opening the box is difficult to be transmitted along the long side direction along which the fracture line extends.

Here, Patent Literature 1 describes that the fracture line in the length surface portion is formed into a wavy shape, and that the rupture starting portion is provided in the trough portion of the wavy shape. As a result, it is possible to prevent bending at the break line during assembly or the like, and to effectively utilize the unsealing force along the wave-shaped break line from the troughs to the crests.

Utility Model Registration No. 3156835

However, Patent Document 1 has the following problems. The first problem is that, as the opening operation, first, the upper part of the opening of the break line is gripped with fingers and rotated and lifted. Since it is difficult, it is concentrated on the upper part of the opening, and the upper part of the opening may be torn (hereinafter referred to as "ripped torn above the opening"). The second problem is that since the breaking line is wavy, the opening force is difficult to be transmitted beyond the ridges of the breaking line, and cutting from the opening along the breaking line stops near the ridges. Therefore, simple opening was difficult (hereinafter referred to as "stopping separation near peaks").

SUMMARY OF THE INVENTION An object of the present invention is to provide a packaging box, a blank sheet for the packaging box, and a packaging body that can be easily opened by cutting a wave-shaped breaking line provided on a longitudinal surface.

A packaging box according to the present invention is a packaging box having a substantially rectangular parallelepiped shape, comprising a rectangular top surface, a rectangular bottom surface, and a pair of long surfaces connecting the long sides of the top surface and the bottom surface. and a pair of width surface portions connecting short sides of the top surface portion and the bottom surface portion, and the length surface portion includes one valley portion extending in the length direction, and the valley portion and the valley portion. a wavy first breaking line having two crests adjacent to the ridges and two ends connected to the width surface via curved lines gently descending from the two crests; a pair of first guiding ruled lines located above the breaking line and sandwiching the valley in the longitudinal direction and inclined so that the distance between them increases upward, above the first breaking line, and , and a pair of second guide ruled lines that are positioned close to the corners of the top surface portion and are inclined upward so that the distance between them widens. A second break line extending and continuing from the first break line is formed.

The blank sheet of the packaging box according to the present invention is rectangular and has a first folding line and a second folding line that are parallel to each other, and a pair of third folding lines that are parallel to each other and orthogonal to the first folding line. and a pair of mutually parallel fourth folding lines that are rectangular and orthogonal to the first folding line, and are connected to the top panel via the first folding line a rectangular shape having a fifth folding line parallel to the second folding line; and a pair of mutually parallel sixth folding lines orthogonal to the second folding line; The other length surface portion connected to the surface portion via the second bending line, and a pair of mutually parallel seventh bending lines that are rectangular and orthogonal to the fifth bending line, and the other The bottom surface portion connected to the length surface portion via the fifth bending line, and a pair of first inner flaps connected to one of the length surface portions via the pair of fourth bending lines. a pair of second inner flap portions connected to the other length surface portion via the pair of sixth fold lines, respectively; and a top surface portion connected to the top surface portion via the pair of third fold lines. and a pair of second outer flaps connected to the bottom surface via the pair of seventh bending lines. .

ADVANTAGE OF THE INVENTION According to this invention, the packaging box which can be easily opened, the blank sheet of this packaging box, and a package can be provided by cutting the wave-shaped breaking line provided in a length surface part.

It is a perspective view of the packaging box before opening in one embodiment of the present invention. It is a side view of the packaging box shown by FIG. 1, (a) is a side view in a 2nd surface part, (b) is a side view in a 3rd surface part. 2 is a plan view of a blank sheet in which the packaging box shown in FIG. 1 is unfolded; FIG. 2 is a partially enlarged perspective view of the packaging box shown in FIG. 1 in an unopened state; FIG. It is a figure explaining the breaking start state in opening operation|movement of the packaging box shown by FIG. It is a figure explaining the fracture|rupture state from the opening part to the peak part in opening operation|movement of the packaging box shown by FIG. FIG. 7 is a diagram for explaining a deformation start state of edges extending in the height direction in the opening operation of the packaging box shown in FIG. 6 ; 8A and 8B are diagrams for explaining a broken state due to deformation of the edges extending in the height direction in the opening operation of the packaging box shown in FIG. 7 ; FIG. FIG. 9 is a perspective view showing an article display form in which the packaging box shown in FIG. 8 is opened;

DETAILED DESCRIPTION OF THE INVENTION Embodiments for carrying out the present invention will be described in detail below with reference to FIGS. 1 to 9. FIG. However, the present invention is not limited to this embodiment. The packaging box 10 in the present embodiment uses a single-flute double-faced corrugated board with a corrugated core between the front liner (the outer surface of the packaging box 10) and the back liner (the inner surface of the packaging box 10). do.

<Terms>
In the description of the present specification and the scope of claims, the term “package” refers to the packaging box 10 in which an article is accommodated, particularly an article 70 (see FIG. 9) that is manufactured by accommodating the packaging box 10. It is after opening and before opening.

In the description of this specification and claims, "height" indicates the distance between the first surface portion 11 and the fourth surface portion 14, and "width" indicates the distance between the second surface portion 12 and the third surface portion 13. What indicates the distance and "length" are the lengths of the opposing surfaces formed by the first inner flap portion 22, the second inner flap portion 23, the first outer flap portion 31 and the second outer flap portion 34, respectively. It shall indicate the distance. In addition, in the description of the present specification and claims, the term "length plane" indicates a plane extending in the height direction and the length direction, and the term "width plane" means the height direction and the plane extending in the length direction. A plane extending in the width direction shall be indicated. Furthermore, in the description of this specification and the scope of claims, "above" indicates the first surface portion 11 side, and "below" indicates the fourth surface portion 14 side. In addition, in the description of the present specification and claims, the term “guide ruled line” indicates a ruled line that guides deformation of the packaging box 10 .

<One embodiment>
<About structure>
FIG. 1 is a perspective view of a packaging box 10 before opening in one embodiment of the present invention, FIG. 2 is a side view of the packaging box shown in FIG. FIG. (b) represents a side view of the third surface portion 13, and FIG. 3 is a plan view of a blank sheet 10B obtained by unfolding the packaging box 10 shown in FIG. Here, in FIG. 3, the solid line indicates the outer shape of the blank sheet 10B, the thin dashed line indicates the folding line and ruled line for facilitating folding, and the thick dashed line facilitates the folding operation and deformation, and can be used as desired. 2 shows a break line in which cuts of a suitable shape such as a linear shape, a wave shape, a substantially hook shape, a "Y" shape, etc. are intermittently made to facilitate the user's breaking operation.

The package 1 in this embodiment is configured by housing an article 70 (see FIG. 9) in a packaging box 10 . The shape of the article 70 in the present embodiment is suitable to have a shape such as a cylindrical shape or an inverted truncated cone shape that creates a gap between itself and the packaging box 10 in which it is housed. Specifically, it is suitable for storing cup noodle products and the like.

As shown in FIGS. 1 to 3, the packaging box 10 according to this embodiment is a cardboard packaging box based on JIS Z 1507-1989 04 (assembly type) 0410 (code), and has a rectangular first surface (top). The long sides of the surface portion 11 and the fourth surface portion (bottom surface portion) 14 are longer than the short sides, and the height is lower than the short sides of the first surface portion 11 and the fourth surface portion 14. It is a wraparound case with The packaging box 10 includes five rectangular surface portions from the first surface portion 11 to the fifth surface portion 15, four inner flap portions including a pair of first inner flap portions 22 and a pair of second inner flap portions 23, and a pair of first inner flap portions. It is configured with four outer flap portions, an outer flap portion 31 and a pair of second outer flap portions 34 . In the packaging box 10 according to the present embodiment, as shown in FIG. 3, from the left, the fifth surface portion 15, the fourth surface portion 14, the third surface portion 13, the first surface portion 11, and the second surface portion 12 are continuous in this order. , the second surface portion 12 and the fifth surface portion 15 are not continuous.

The first surface portion (top surface portion) 11 is rectangular and has a first edge L1 and a second edge L2 that are parallel to each other, and a pair of third edges L3 that are parallel to each other and orthogonal to the first edge L1. .

The second surface portion (one long surface portion) 12 is rectangular and has a pair of mutually parallel fourth edges L4 orthogonal to the first edge L1. It is bent at a right angle and connected to the long side of the first surface portion 11 .

The third surface portion (the other long surface portion) 13 is rectangular and includes a fifth edge L5 parallel to the second edge L2 and a pair of mutually parallel sixth edges L6 orthogonal to the second edge L2. Via this second edge (second folding line) L2, it is bent at a right angle to connect to the long side of the first surface portion 11 and face the second surface portion 12. As shown in FIG.

The fourth surface portion (bottom portion) 14 is rectangular and has a pair of mutually parallel seventh edges L7 perpendicular to the fifth edge L5 and an eighth edge L8 parallel to the fifth edge L5. It is bent at a right angle via a fifth edge (fifth folding line) L5 to connect to the long side of the third surface portion 13 and face the first surface portion 11 .

The fifth surface portion (side surface portion, length surface portion) 15 is rectangular, and is bent at right angles via the eighth edge (eighth folding line) L8 to connect to the long side of the fourth surface portion 14. It faces the three-sided portion 13 .

A pair of first inner flap portions (width surface portions) 22 are bent at right angles via a pair of fourth edge sides (fourth bending lines) L4 and are connected to the short sides of the second surface portion 12, respectively, and mutually opposite.

A pair of second inner flap portions (width surface portions) 23 are bent at right angles via a pair of sixth edge sides (sixth bending lines) L6, and are connected to the short sides of the third surface portion 13, respectively, and mutually opposite.

The pair of first outer flap portions (width surface portions) 31 are bent at a right angle via a pair of third edge sides (third bending lines) L3 and are connected to the short sides of the first surface portion 11, respectively. opposite.

The pair of second outer flap portions (width surface portions) 34 are bent at right angles via a pair of seventh edge sides (seventh bending lines) L7 and are connected to the short sides of the fourth surface portion 14, respectively. opposite.

(About broken lines)
2A and 3, the fracture line C1 at the second surface portion 12, the fracture line C2 at the pair of first inner flap portions 22, and the fracture line at the pair of fourth edges L4 in this embodiment. C3a and C3b will be explained. Here, the fracture line C1 on the third surface portion 13, the fracture line C2 on the pair of second inner flap portions 23, and the fracture lines C3a and C3b on the pair of sixth edges L6 are the fracture lines on the second surface portion 12. Since it has the same form as C1, the breaking line C2 at the pair of first inner flap portions 22, and the breaking lines C3a and C3b at the pair of fourth edge sides L4, description thereof will be omitted.

A wave-shaped first breaking line C1 extending in the length direction is formed on the second surface portion 12 . The wave-shaped first break line C1 passes through a trough portion including a break start portion Cs, two gentle crest portions C1a, and curves gently descending from the two crest portions C1a, respectively. Details will be described later. and two ends C1b that are connected to a pair of second breaking lines C2 that connect to each other. Here, in the second surface portion 12, the region above the first breaking line C1 is referred to as an upper second surface portion 12a, and the region below the first breaking line C1 is referred to as a lower second surface portion 12b. Similarly, in the third surface portion 13, the region above the first breaking line C1 is referred to as an upper third surface portion 13a, and the region below the first breaking line C1 is referred to as a lower third surface portion 13b. In the wave-shaped first breaking line C1 of the present embodiment, two intersections Csa between a breaking start portion Cs and a gripping ruled line Rs, which will be described later in detail, and two ends C1b connected to a pair of second breaking lines C2. , and are set to approximately 1/2 of the height of the packaging box 10, respectively. This rupture start portion Cs is located at a position not covered by the fifth surface portion 15 (see FIG. 2A), and in a state where the packaging box 10 accommodates the article 70, the gap between the packaging box 10 and the article 70 is is formed in a tongue-like shape that serves as a separation start portion. This allows the user to push the break start portion Cs during the opening operation, and prevents the break start portion Cs from coming into contact with the article 70 and damaging the article 70 due to this push. The breakage starting portion Cs in the present embodiment is provided at a position shifted from the center in the length direction of the second surface portion 12, but this is not a limitation, and depending on the arrangement of the articles 70 stored in the packaging box 10, It may be provided at the center position in the length direction of the second surface portion 12 . Here, although the details will be described later, the first wave-shaped breaking line C1 and the pair of second breaking lines C2 divide the packaging box 10 into two parts in the height direction, and the packaging box 10 is displayed in a product display form (see FIG. 9). ).

Also, a pair of second break lines C2 are formed in the pair of first inner flap portions 22, which are connected to the first break lines C1 and extend to the edges in the extending direction thereof. In this embodiment, the second breaking line C2 is formed so as to be positioned on an extension line of the boundary between the first outer flap portion 31 and the second outer flap portion 34 . Here, in the pair of first inner flap portions 22, the region above the second breaking line C2 is defined as an upper first inner flap portion 22a, and the region below the second breaking line C2 is defined as a lower first inner flap portion 22a. 1 inner flap portion 22b. Similarly, in the pair of second inner flap portions 23, the region above the second breaking line C2 is defined as the upper second inner flap portion 23a, and the region below the second breaking line C2 is defined as the lower side flap portion 23a. 2 inner flap portion 23b.

Furthermore, in the pair of fourth edges L4, an upper third breaking line C3a and a lower third breaking line C3b are continuous above and below the first breaking line C1 and the second breaking line C2, respectively. formed. Similarly, the pair of sixth edges L6 are continuous with an upper third breaking line C3a and a lower third breaking line C3b above and below the first breaking line C1 and the second breaking line C2, respectively. formed by Here, although the details will be described later, the upper third breaking line C3a and the lower third breaking line C3b in the present embodiment are edges extending in the height direction of the packaging box 10 (a pair of fourth edges L4 and It is provided to facilitate deformation of the pair of sixth edges L6) and to make the packaging box 10 have a planar shape that does not become bulky when discarded.

The first breaking line C1 of the present embodiment is configured by arranging a plurality of shapes such that the lower part of the "Y" shape faces the pair of fourth edges L4 at the portion adjacent to the breaking start portion Cs. ing. In addition, the first breaking line C1 of the present embodiment is configured to have a substantially hook shape at the portion adjacent to the end portion C1b. Furthermore, the second breaking line C2 of the embodiment is configured by arranging a plurality of substantially hook-shaped portions. In addition, the rupture starting portion Cs of the present embodiment is formed by narrowing the interval between the cuts and making the length of the cut relatively long so that it can be easily opened by pushing in the user. .

In the present embodiment, the fifth edge L5, the eighth edge L8, and the gripping ruled line Rs are each formed with breaking lines to facilitate bending, but this is not essential. , can be omitted.

(About ruled lines)
Ruled lines Rs, R1, and R2 on the second surface portion 12 of the present embodiment will be described with reference to FIGS. Here, the ruled lines Rs, R1, and R2 on the third surface portion 13 shown in FIG. 2(b) are in the same form as the ruled lines Rs, R1, and R2 on the second surface portion 12 shown in FIG. 2(a). Therefore, the explanation is omitted.

On the second surface portion 12, an arc-shaped grasping ruled line Rs curved upward is provided in the vicinity of the upper portion of the break start portion Cs so that the break start portion Cs can be easily bent toward the inside of the package 1. is formed. The gripping ruled line Rs in the present embodiment has an arcuate shape that curves upward, but is not limited to this, and may have a linear shape. In addition, in the present embodiment, since the user's finger is inserted into the region surrounded by the breakage starting portion Cs and the grip ruled lines Rs, the height is set to 15 to 30 mm and the length is set to 50 to 70 mm. is preferred.

Further, on the second surface portion 12, a pair of first guide ruled lines R1 are formed as straight lines with a mutual interval increasing upward in the vicinity of the intersection point Csa between the breaking start portion Cs and the grip ruled line Rs. . Specifically, the pair of first guiding ruled lines R1 pass through the intersection point Csa between the breaking start portion Cs and the gripping ruled line Rs, and are on a line extending diagonally upward from both ends in the length direction of the breaking start portion Cs. formed. Here, the angle α formed by the pair of first guide ruled lines R1 with respect to the first edge L1 in the present embodiment (see FIG. 2A) is, for example, in the range of 30° to 60°, preferably 45°. and As a result, although the details will be described later, the unsealing force during the unsealing operation is not concentrated above the opening 40 (see FIG. 5). It can be eliminated.

Furthermore, on the second surface portion 12, near the upper corner portion 11a, which is the intersection point of the first edge L1 and the pair of third edges L3, a pair of second edges are formed as straight lines that widen upward. A guiding ruled line R2 is formed. Specifically, the pair of second guide ruled lines R2, which will be described later in detail, are on a line connecting a point between the crest C1a and the end C1b on the first breaking line C1 and the upper corner 11a. formed. Here, the angle β formed by the pair of second guide ruled lines R2 with respect to the first edge L1 in the present embodiment (see FIG. 2A) is, for example, in the range of 30° to 60°, preferably 45°. and As a result, although the details will be described later, the unsealing force during the unsealing operation can effectively act from the crest C1a to the end C1b of the first breaking line C1. (separation stops near peaks) can be solved. Furthermore, although the details will be described later, the deformation in the edges extending in the height direction (the pair of fourth edges L4 and the pair of sixth edges L6) that occurs during the opening operation is caused by the pair of second guide ruled lines R2. Since it occurs at a position where a gap is formed between the box 10 and the article 70, this deformation can be allowed and the article 70 can be prevented from being damaged due to the deformation of the edges.

The gripping ruled lines Rs, the pair of first guiding ruled lines R1, and the pair of second guiding ruled lines R2 in this embodiment are formed by the back liner so as to compress the thickness in order to facilitate bending of the packaging box 10. It is formed by ruling from one side. In addition, the first guide ruled line R1 and the second guide ruled line R2 in the present embodiment are each provided as a pair of straight lines that widen upwards, but are not limited to this. It may also be provided as two or three pairs of straight lines spaced apart from each other.

In addition, in the blank sheet 10B in the present embodiment, the first folding line L1, the second folding line L2, the fifth folding line L5, and the eighth folding line L8 serve as vertical creases (so-called creases) of the cardboard, and a pair of The third folding line L3, the pair of fourth folding lines L4, the pair of sixth folding lines L6, and the pair of seventh folding lines L7 are set to be horizontal ruled lines (so-called scores) of the cardboard. The formation direction of the ruled lines in the present embodiment is along each edge, but is not limited to this, and may be formed in any direction as long as the object of the present invention, which is easy to open, can be achieved. good.

<Assembling the packaging box>
An example of assembling the packaging box 10 from the blank sheet 10B in this embodiment will be described. First, the blank sheet 10B is arranged so that the back liner is positioned on the upper side, and the article 70 to be accommodated is placed on the first surface portion 11 . Next, the second surface portion 12 and the third surface portion 13 are bent around the first surface portion 11 via the first bending line L1 and the second bending line L2. Then, the pair of first inner flap portions 22 and the pair of second inner flap portions 23 are folded through the pair of fourth folding lines L4 and the pair of sixth folding lines L6. Subsequently, the pair of first outer flap portions 31 is folded via the pair of third folding lines L3 so as to overlap the first inner flap portion 22 and the second inner flap portion 23, and the first inner flap portion It is glued to the portion 22 and the second inner flap portion 23 . Furthermore, the fourth surface portion 14 is folded via the fifth folding line L5 to face the first surface portion 11, and then overlaps the first inner flap portion 22 and the second inner flap portion 23. , the pair of second outer flap portions 34 are folded through the pair of seventh folding lines L7 and adhered to the first inner flap portion 22 and the second inner flap portion 23. As shown in FIG. Finally, the packaging box 10 shown in FIG. Assembled. The bonding in this embodiment is performed by sticking (hot-melting) with an adhesive such as hot-melt resin, for example. Further, the application of the adhesive in the present embodiment can be performed at appropriate timings for each adhesion site. By this assembly, the first surface portion 12 is used as the top surface portion, the fourth surface portion 14 is used as the bottom surface portion, the second surface portion 12, the fifth surface portion 15 and the third surface portion 13 are used as the length surface portions, and the pair of first inner flap portions 22 are assembled. , a pair of second inner flap portions 23, a pair of first outer flap portions 31, and a pair of second outer flap portions 34 are formed as width surface portions.

<About opening the packaging box>
The opening operation of the packaging box 10 when taking out the articles 70 stored in the packaging box 10 will be described in detail with reference to FIGS. 4 to 9. FIG. FIG. 4 is a partially enlarged perspective view of the packaging box 10 shown in FIG. 1 in an unopened state, and FIGS. It is a figure explaining the fracture|rupture state to C1a, the deformation|transformation start state of the edge L4 extended in a height direction, the fracture|rupture state accompanying deformation|transformation of the edge L4 extended in a height direction, and an unsealed state, respectively. White arrows A, B, E, F, G, I, and K in the figure represent directions of force applied to the packaging box 10 by the user, and black arrows D, H, and J represent the direction of the force applied to the packaging box. 10 deformation directions are shown. The opening operations of the second surface portion and the third surface portion 13 in this embodiment may be performed simultaneously, or may be performed separately one by one. Here, since the unsealing operation on the third surface portion 13 is similar to the unsealing operation on the second surface portion 12, the description thereof is omitted. In addition, in the opening operation of the second surface portion 12, the opening operation along the first breaking line C1 on the back side in the length direction (the little finger side of the user in FIG. 4) from the breaking start portion Cs is the front side in the length direction from the breaking start portion Cs. Since it has the same form as the first broken line C1 on the side (user's thumb side in FIG. 4), the description is omitted.

(Break start state)
First, in the unopened state of the packaging box 10 shown in FIG. 4, the user's fingertip is pushed into the tongue-shaped breakage start portion Cs formed in the valley of the first breakage line C1 (outlined in FIG. 4). See arrow A). Here, since the rupture starting portion Cs is configured by narrowing the interval between the cuts and making the length of the cuts relatively long, as shown in FIG. An opening 40 is formed. After that, by further pressing the fingertip into the break start portion Cs, the break start portion Cs is folded inside the packaging box 10 via the grasping ruled line Rs. At this time, by bringing the thumb or part of the palm into contact with the first edge L1 or the first face portion 11, the opening operation can be performed more stably.

(Break state from the opening to the crest)
Furthermore, as shown in FIG. 5, the user's finger is hooked on the part bent inward through the grasping ruled line Rs, and the upper second surface portion 12a is rotated around the first edge L1 as a rotation axis. 10 is started to rotate outward (see white arrow B in FIG. 5). In this state, the user's unsealing force B (rotational force) acts indirectly toward the ridge C1a, thereby cutting the first breaking line C1 from the opening 40 to the ridge C1a. Specifically, as shown in FIG. 6, the unsealing force B causes the first guiding ruled line R1 formed in the vicinity of the gripping ruled line Rs to form first mountain folds in order from bottom to top. D (see black arrow D in FIG. 6) occurs. Since this first mountain-folded portion D acts like a hinge, the unsealing force B is applied via the first mountain-folded portion D to a shearing force E along the surface of the upper second surface portion 12a (Fig. 6 (See white arrow E in the middle). Further, this shearing force E acts through the first mountain fold D to pull the upper second surface portion 12a surrounded by the first mountain fold D and the fourth edge L4 (C3a). Here, as shown in FIG. 2(a), the first breaking line C1 in the present embodiment is a trough portion including the rupture starting portion Cs and a gentle It is a wave shape having peaks C1a. Therefore, the shearing force E along the surface of the upper second surface portion 12a shown in FIG. C1 can be cut up to peak C1a.

In this embodiment, the unsealing force B is not concentrated above the opening 40, but passes along the surface of the upper second surface portion 12a via the first mountain fold D generated by the first breaking line C1. Since it is converted into the shearing force E, the first problem in Patent Literature 1 described above (breakage above the opening) can be resolved.

(Deformation start state of edges extending in the height direction)
Subsequently, as shown in FIG. 7, the upper second surface portion 12a is further rotated to the outside of the packaging box 10 (see white arrow F in FIG. 7). This turning force F indirectly acts on the fourth edge (the edge extending in the height direction) L4, so that the central portion of the fourth edge L4 is moved to the inside of the packaging box 10 (the Deformation to be dented (see black arrow J) is started. Specifically, due to this turning force F, a shearing force G (see white arrow G in FIG. 7) acts on the surface of the upper second surface portion 12a via the first mountain fold portion D. As shown in FIG. Due to the shearing force G along the surface of the upper second surface portion 12a, the second guide ruled line R2 formed in the vicinity of the upper corner portion 11a has a second mountain fold portion H in order from the bottom to the top. (See black arrow H in FIG. 7). Since the second mountain fold H acts like a hinge, the shear force G along the surface of the upper second surface portion 12a is applied to the upper second surface portion 12a via the second mountain fold H. It is converted into a shear force I along the surface (see white arrow I in FIG. 7). Further, this shearing force I acts to pull the upper second surface portion 12a surrounded by the second mountain fold H and the upper fourth edge L4 (C3a) via the second mountain fold H. do. As a result, the central portion of the fourth edge L4 moves inward of the packaging box 10 (see arrow J in FIG. 7) around the upper corner portion 11a, that is, moves inward of the packaging box 10 (see arrow J in FIG. 7). (See black arrow J in 7). Here, the fourth edge L4 in the present embodiment is provided with an upper third breaking line C3a and a lower third breaking line C3b in order to facilitate deformation. Only the three break lines C3a may be provided, or the third upper break line C3a and the third lower break line C3b may not be provided.

(Break state from crest to end)
Subsequently, as shown in FIG. 7, the upper second surface portion 12a is further rotated to the outside of the packaging box 10 (see white arrow F in FIG. 7). This turning force F continues to indirectly act on the fourth edge L4, so that the central portion of the fourth edge L4 is depressed inwardly of the packaging box 10 (see the black arrow J in FIG. 7). goes further. This further inward deformation of the packaging box 10 effectively acts from the crest C1a to the end C1b of the adjacent first break line C1. can be cut up to At this time, as shown in FIG. 8, part or all of the second breaking line C2 can be cut at the same time as the breaking of the first breaking line C1. Here, since the deformation at the fourth edge L4 occurs at a position where a gap is formed between the packaging box 10 and the article 70 by the pair of second guide ruled lines R2, the packaging box 10 is recessed inward. Deformation can be tolerated, and the article 70 can be prevented from being damaged due to this edge deformation.

In the present embodiment, the turning force F is converted into a shearing force I along the surface of the upper second surface portion 12a via the second mountain fold portion H generated by the second guide ruled line R2, and the fourth edge (high In order to deform the edge L4 extending in the vertical direction, it is possible to effectively act from the crest C1a to the end C1b of the adjacent first breaking line C1. Therefore, it is possible to solve the second problem (separation stop in the vicinity of the crest) in Patent Document 1 described above.

(opened state)
Furthermore, as shown in FIG. 8, if there is a portion of the second breaking line C2 that has not been cut, the user follows the turning motion and bends the portion inward through the grasping ruled line Rs. A series of lifting operations are performed to grip and lift the upper second surface portion 12a upward of the packaging box 10 (see white arrow K in FIG. 8). This lifting force K directly acts on the second breaking line C2, so that the second breaking line C2 can be cut in order from the second surface portion 12 side toward the third surface portion 13 side. By dividing the first inner flap 22 into the upper first inner flap portion 22a and the lower first inner flap portion 22b, the packaging box 10 is vertically divided into two parts, and the packaging box 10 is opened. As shown in FIG. 9, an article 70 is placed in the divided lower half packaging box 10 in an accommodated state. Therefore, the lower half of the packaging box 10 can be used as an article display form that can be used as a display tray in a shop or the like.

As described above, in the present embodiment, the pair of first guiding ruled lines R1 and the pair of second guiding ruled lines R2 form a series of wave-shaped first breaking lines C1 and second breaking lines C2 in the opening 40 of the packaging box 10. can be easily cut by the rotating motion and the lifting motion of , and the packaging box 10 can be opened.

<Operations when dismantling the packaging box>
In the divided lower half packaging box 10, as shown in FIG. 9, a pair of fourth edges L4 and a pair of sixth edges L6 are provided with lower third breaking lines C3b. Also, although illustration is omitted in the divided upper half packaging box 10, similarly, an upper third breaking line C3a is provided on the pair of fourth edges L4 and the pair of sixth edges L6. . As a result, when dismantling the packaging box 10 divided into upper and lower parts, by cutting the upper third breaking line C3a and the lower third breaking line C3b, a flat surface that is not bulky when collected as recyclable waste is cut. shape.

In the packaging box 10 of the present embodiment, the second surface portion 12, the third surface portion 13, the fifth surface portion 15, the pair of first outer flap portions 31, and A pair of second outer flap portions 34 are printed with characters, figures, symbols, or a combination of these to suggest the position of the first break line C1 including the break start portion CS and the second break line C2. can be Further, in the packaging box 10 of the present embodiment, the first surface portion 11, the second surface portion 12, the third surface portion 13, the fourth surface portion 14, and the pair of first surface portions 11, 12, 13, 14 are arranged so that the user can easily dismantle the packaging box 10. The outer flap portion 31 and the pair of second outer flap portions 34 are provided with letters, figures, symbols, or a combination of these that indicate the positions of the upper third breaking line C3a and the lower third breaking line C3b. You can print other things.

Furthermore, although the packaging box 10 and the blank sheet 10B in this embodiment are made of cardboard, they are not limited to this, and may be made of cardboard or plastic, for example.

1 package 10 packaging box 10B blank sheet 11 first surface (top surface)
12 second surface (one length surface)
12a Upper side second surface portion 12b Upper side second surface portion 13 Third surface portion (other length surface portion)
13a upper third surface portion 13b upper third surface portion 14 fourth surface portion (bottom portion)
15 Fifth surface (side surface, length surface)
22 pair of first inner flaps (width surface)
22a Upper side first inner flap portion 22b Lower side first inner flap portion 23 Pair of second inner flap portions (width surface portions)
23a Upper side second inner flap portion 23b Lower side second inner flap portion 31 Pair of first outer flap portions (width surface portions)
34 pair of second outer flaps (width surface)
70 Article C1 First breaking line C2 Second breaking line C3a Upper third breaking line C3b Lower third breaking line Cs Break start part Rs Ruled lines for gripping R1 Pair of first guide ruled lines R2 Pair of second guide ruled lines L1 1 edge (first fold line)
L2 second edge (second fold line)
L3 pair of third edges (third fold line)
L4 pair of fourth edges (fourth folding lines)
L5 Fifth edge (fifth fold line)
L6 pair of sixth edges (sixth fold line)
L7 pair of seventh edges (seventh fold line)
L8 8th edge (8th fold line)

Claims (11)

A packaging box having a substantially rectangular parallelepiped shape,
A rectangular top surface portion, a rectangular bottom surface portion, a pair of length surface portions connecting long sides of the top surface portion and the bottom surface portion, and a pair of width surfaces connecting short sides of the top surface portion and the bottom surface portion. Department and
with
In the length face part,
Extending in the length direction, one trough, two ridges adjacent to the trough, and two ridges connected to the width surface via curves gently descending from the two ridges an undulating first break line having an end portion;
a pair of first guide ruled lines located above the first breaking line and at positions sandwiching the valley portion in the longitudinal direction, and inclined so that the distance between them increases upward;
It is above the first break line and close to the corner of the top surface portion, and is arranged in parallel with the pair of first guide ruled lines so that the distance between them increases upwards. a pair of inclined second guide ruled lines;
is formed and
No other guide wire is interposed between the pair of first guide wires and the pair of second guide wires,
The width surface portion is
a pair of first inner flap portions connected to one of the length surface portions;
a pair of second inner flap portions connected to the other length surface portion;
with
In the first inner flap portion and the second inner flap portion ,
a second breaking line extending in the width direction and continuous with the first breaking line;
A packaging box characterized in that is formed. The width surface portion is
a pair of first outer flap portions connected to the top surface portion;
and a pair of second outer flaps connected to the bottom surface,
The first outer flap portion is joined to outer upper halves of the first inner flap portion and the second inner flap portion,
The second outer flap portion is joined to the outer lower halves of the first inner flap portion and the second inner flap portion,
The second breaking lines are formed at intermediate portions in the height direction of the first inner flap portion and the second inner flap portion,
4. A breaking line is formed at least above a position where the first breaking line and the second breaking line connect on the edge between the length surface portion and the width surface portion. 1. The packaging box according to 1. The top surface portion is rectangular and has a first edge and a second edge that are parallel to each other, and a pair of third edges that are parallel to each other and are orthogonal to the first edge,
one of the long face portions is rectangular, has a pair of mutually parallel fourth edges orthogonal to the first edges, and extends from the first edges and is bent at right angles;
The other length face portion is rectangular and has a fifth edge parallel to the second edge and a pair of mutually parallel sixth edges orthogonal to the second edge, and the second edge extends from and is bent at a right angle to face one of the length face portions,
The bottom surface portion is rectangular, has a pair of mutually parallel seventh edges orthogonal to the fifth edge, extends from the fifth edge, and is bent at right angles to face the top surface portion,
the pair of first inner flap portions extend from the pair of fourth edges, respectively, and are bent at right angles to face each other;
the pair of second inner flap portions extend from the pair of sixth edges, respectively, and are bent at right angles to face each other;
the pair of first outer flap portions extending from the pair of third edges, respectively, and bent at right angles to face each other;
3. The packaging box according to claim 2, wherein the pair of second outer flap portions extend from the pair of seventh edges, respectively, and are bent at right angles to face each other. 3. The first guiding ruled line is provided on a line obtained by extending both lengthwise end sides of a break starting portion included in the valley of the first breaking line. The packaging box according to any one of . 5. The packaging box according to claim 4, wherein the angle formed by the first guide ruled line with respect to the edge between the top surface portion and the length surface portion is in the range of 30[deg.] to 60[deg.]. 6. The second guiding ruled line is provided so that the corner of the top surface portion is positioned on a line obtained by extending the second guiding ruled line. The packaging box described in . 7. The packaging box according to claim 6, wherein the angle formed by the second guiding ruled line with respect to the edge between the top surface portion and the length surface portion is in the range of 30[deg.] to 60[deg.]. A blank sheet for the packaging box according to any one of claims 1 to 7,
The top surface portion is rectangular and has a first folding line and a second folding line that are parallel to each other, and a pair of third folding lines that are parallel to each other and orthogonal to the first folding line;
one of the long surface portions which is rectangular and has a pair of mutually parallel fourth bending lines orthogonal to the first bending lines, and which is connected to the top surface portion via the first bending lines;
It is rectangular and has a fifth folding line parallel to the second folding line, and a pair of mutually parallel sixth folding lines orthogonal to the second folding line, and the second folding at the top surface portion. the other length surface portion connected via a line;
the bottom portion having a rectangular shape and having a pair of mutually parallel seventh bending lines perpendicular to the fifth bending line, and connected to the other length surface portion via the fifth bending line;
a pair of first inner flap portions connected to one of the length surface portions via the pair of fourth folding lines, respectively;
a pair of second inner flap portions connected to the other length surface portion via the pair of sixth folding lines, respectively;
a pair of first outer flap portions connected to the top surface portion via the pair of third folding lines, respectively;
a pair of second outer flap portions connected to the bottom surface portion via the pair of seventh folding lines, respectively;
A blank sheet comprising: the bottom portion includes an eighth fold line parallel to the fifth fold line;
9. The blank sheet according to claim 8, further comprising a side surface portion connected to the bottom surface portion via the eighth folding line. In the pair of fourth folding lines and the pair of sixth folding lines, break lines are formed from corners of the top surface portion to at least positions where the first break line and the second break line connect. 10. The blank sheet according to claim 8 or 9, characterized in that: 8. A package, comprising an article housed in the packaging box according to any one of claims 1 to 7.

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