JP2024098340A - Packaging box - Google Patents

Abstract

To provide a packaging box for effectively storing fruits and vegetables whose sizes change depending on the growing conditions, place of production, etc.
[Solution] The present invention relates to a packaging box 10 which includes a pair of first side wall portions 11a, 11b, a pair of second side wall portions 12a, 12b, a pair of first top flap portions 21a, 21b, a pair of second top flap portions 22a, 22b, and a bottom wall portion 30, and which has a rectangular parallelepiped shape by preventing rotation with the pair of first top flap portions 21a, 21b and the pair of second top flap portions 22a, 22b, and in which additional lines AL1, AL2 are formed parallel to the upper edge and further toward the leading edge of the upper edge on the pair of first top flap portions 21a, 21b and the pair of second top flap portions 22a, 22b, and furthermore, auxiliary lines SL1, SL2 are formed in a V-shape or an inverted V-shape further toward the leading edge of the formed lines.
[Selected figure] Figure 2

Description

The present invention relates to a packaging box.

Traditionally, packaging boxes such as cardboard boxes (hereinafter simply referred to as packaging boxes) have been widely used in the display and auction of goods including fresh produce such as vegetables and fruits.

While known packaging boxes of this type include one that has a pair of first side panels and a pair of second side panels that are alternately connected in the left-right direction and that is sealed by butting together flaps extending from the upper edges of the first and second side panels and attaching sealing tape, there are also known boxes that can form a lid without using sealing tape. For example, Patent Document 1 describes a configuration in which the lid is formed by folding the first to fourth flaps counterclockwise, in which a protrusion is formed on the right side of the second flap (the third flap side) that extends toward the third flap, and an engagement hole is provided in the third flap for inserting the protrusion.

JP 2015-168455 A

However, the size of produce and other items can change depending on how they grow and where they are produced. When they are stored in a packaging box, they may protrude above the top of the box, which could cause damage to the side of the produce facing the top. Furthermore, preparing packaging boxes of different sizes to accommodate the changing sizes of produce is likely to result in increased costs and storage space. However, the cardboard box described in Patent Document 1 does not fully take these points into consideration, and there is still room for improvement in the structure of packaging boxes for storing produce and other items whose sizes change depending on how they grow and where they are produced.

The objective of the present invention is to provide a packaging box for efficiently storing fruits and vegetables whose size varies depending on the growing conditions, place of production, etc.

A first embodiment of the packaging box according to the present invention includes a pair of opposing first side wall portions, a pair of second side wall portions opposing each other in a direction perpendicular to the first side wall portions, a pair of first top surface flap portions each extending from an upper edge of the pair of first side wall portions and perpendicular to the first side wall portions, a pair of second top surface flap portions each extending from an upper edge of the pair of second side wall portions and perpendicular to the second side wall portions, and a bottom wall portion opposing the pair of first top surface flap portions and the pair of second top surface flap portions, wherein the second top surface flap portion is sandwiched between the end portions of the pair of first top surface flap portions, and each of the pair of second top surface flap portions is The packaging box has a rectangular parallelepiped shape, with the pair of first top flap parts and the pair of second top flap parts preventing rotation so that the first top flap part is sandwiched at its end, and is characterized in that the pair of first top flap parts and the pair of second top flap parts each have an additional line formed parallel to the upper edge on the leading edge side of the upper edge, and the pair of first top flap parts and the pair of second top flap parts each have an auxiliary line formed in a V-shape or an inverted V-shape on the leading edge side of the formed line.

The second embodiment of the packaging box according to the present invention is the same as the first embodiment, characterized in that the first side wall has an air hole, the second side wall has a handle hole, and the bottom wall has a drainage hole.

A third embodiment of the packaging box according to the present invention is the one described as the first or second embodiment, characterized in that the additional crease and/or the auxiliary crease is a lead crease.

According to the present invention, by providing the above-mentioned additional and auxiliary lines on the top flap portion of the packaging box, it becomes possible to effectively store fruits and vegetables, etc., whose size changes depending on the growth condition, place of production, etc.

1 is a perspective view of a packaging box according to a first embodiment of the present invention, in which fruits and vegetables are normally contained. FIG. 1 is a perspective view of a packaging box according to a first embodiment of the present invention when the box is full of fruit and vegetables; FIG. 1 is a plan view of a blank of a packaging box according to a first embodiment of the present invention when the packaging box is unfolded. FIG. FIG. 11 is a plan view illustrating a suitable range of an inclination angle of auxiliary ruled lines relative to additional ruled lines according to the first embodiment of the present invention. FIG. 11 is a perspective view of a packaging box according to a second embodiment of the present invention, in which fruits and vegetables are normally contained. FIG. 11 is a perspective view of a packaging box according to a second embodiment of the present invention when it is full of fruits and vegetables. FIG. 11 is a plan view of a blank in an unfolded state of a packaging box according to a second embodiment of the present invention. FIG. 11 is a plan view illustrating a suitable range of an inclination angle of auxiliary ruled lines relative to additional ruled lines according to a second embodiment of the present invention.

Below, a detailed description of an embodiment of the present invention will be given with reference to the drawings. However, the present invention is not limited to this embodiment.

In this specification and the claims, the terms "top surface" and "bottom surface" refer to the surfaces defined by the packaging box. However, these terms are used merely for convenience and do not, of course, define absolute positions in the direction of gravity. The same applies to terms such as "top" and "bottom."

In addition, in the description of this specification and the claims, "rectangle" includes not only rectangular and nearly rectangular shapes but also squares and nearly square shapes, and "rectangular prism" includes not only rectangular and nearly rectangular prisms but also cubes and nearly cubes. Furthermore, in the description of this specification and the claims, "parallel" includes not only parallel but also nearly parallel, and "orthogonal" includes not only orthogonal but also nearly orthogonal.

In this specification, the "normal" aspect of the "packaging box in which fresh produce is contained" refers to the time when the fresh produce M is contained within the body of the packaging box 10 when the top flap portions 21a, 21b, 22a, and 22b are folded at the upper edges L5 and L6 of the side walls 11a, 11b, 12a, and 12b of the packaging box 10 (see Figure 1). In addition, in this specification, "full" in "packaging box full of fruits and vegetables" refers to the time when the top flaps 21a, 21b, 22a, and 22b are folded at the upper edges L5 and L6 of the side walls 11a, 11b, 12a, and 12b of the packaging box 10, and the fruits and vegetables M do not fit into the body of the packaging box 10, so the top flaps 21a, 21b, 22a, and 22b are folded at the additional lines AL1 and AL2 to be contained in the packaging box 10. When "full," the top flaps 21a, 21b, 22a, and 22b are folded at the auxiliary lines SL1 and SL2 (see FIG. 2, details will be described later).

First Embodiment
<Structure>
Fig. 1 is a perspective view of a packaging box according to a first embodiment of the present invention in which fruits and vegetables are normally contained, Fig. 2 is a perspective view of a packaging box according to this embodiment in which the box is full of fruits and vegetables, and Fig. 3 is a plan view of a blank of the packaging box according to this embodiment in which the box is unfolded. In Figs. 1 and 2, the fruits and vegetables M contained in the packaging box 10 are indicated by two-dot chain lines for the sake of convenience of explanation.

The packaging body according to the present invention is configured by storing an item M in a packaging box 10. The item M may be any item as long as the effect of the present invention is realized. The stored item M may be, for example, fresh produce such as vegetables and fruits, more specifically, Chinese cabbage, cabbage, and radish. One of the objects of the present invention is to prepare for the case where the lid cannot be closed when the specified amount of crops is put in when the crops grow too large. In this embodiment, the item M is Chinese cabbage, and as shown in Figures 1 and 2, the packaging box 10 stores a total of six pieces of Chinese cabbage M, three in two rows. The packaging box 10 is a cardboard box. When storing fresh produce, a cardboard box with a sturdy thickness is preferable, taking into account the weight. In Figures 1 and 2, the Chinese cabbage M is shown as being see-through from the packaging box 10 for convenience of explanation, but the top flap portion is shown as being opaque to make it easier to distinguish it from the additional lines AL1 and AL2 and the auxiliary lines SL1 and SL2 described below.

Agricultural produce boxes are basically sized based on the weight of the items contained therein, and the packaging box 10 of the present invention is, for example, a 15 kg case. Overgrown M cabbage means, for example, that one M cabbage has become slightly larger, e.g., a so-called L size has become about L+ size. The packaging box 10 of the present invention is designed to address the current situation where, for example, while a normal box containing six L size cabbages (about 15 kg) is just the right size to seal, each cabbage has gradually grown in size, making it difficult to seal the box when two layers of cabbage are stacked inside.

The packaging box 10 according to this embodiment is a height-variable case with auxiliary lines, and more specifically, as shown in FIGS. 1 to 3, includes a pair of opposing first side wall portions 11a, 11b, a pair of second side wall portions 12a, 12b opposing in a direction perpendicular to the first side wall portions 11a, 11b, a pair of first top surface flap portions 21a, 21b extending from upper edges L5 of the pair of first side wall portions 11a, 11b and perpendicular to the first side wall portions 11a, 11b, a pair of second top surface flap portions 22a, 22b extending from upper edges L6 of the pair of second side wall portions 12a, 12b and perpendicular to the second side wall portions 12a, 12b, and a bottom wall portion 30 opposing the pair of first top surface flap portions 21a, 21b and the pair of second top surface flap portions 22a, 22b. The pair of first top surface flap parts 21a, 21b and the pair of second top surface flap parts 22a, 22b are prevented from rotating so that the ends of each of the pair of second top surface flap parts 22a, 22b sandwich the second top surface flap parts 22a, 22b, and the ends of each of the pair of second top surface flap parts 22a, 22b sandwich the first top surface flap parts 21a, 21b, and 21b, respectively, so that the pair of first top surface flap parts 21a, 21b and the pair of second top surface flap parts 22a, 22b have additional lines AL1, AL2 formed parallel to the upper edge and further toward the leading edge than the upper edge, and the pair of first top surface flap parts 21a, 21b and the pair of second top surface flap parts 22a, 22b have auxiliary lines SL1, SL2 formed in a V-shape further toward the leading edge than the formed lines, respectively.

Two (or more) auxiliary lines are provided at an angle to the additional lines. In this embodiment, there are two auxiliary lines SL1 and SL2 per top flap portion, but this is not limited to the present invention, and one additional auxiliary line may be added. In this case, the additional auxiliary line is also inclined with respect to the additional lines AL1 and AL2. Also, in this embodiment, the auxiliary lines SL1 and SL2 are line-symmetrical with respect to a straight line that passes through the center of the top flap portion and is perpendicular to the upper sides L5 and L6, but in the present invention, they may be asymmetrical. However, line symmetry is preferable in terms of achieving the effects of the present invention. The same applies to the second embodiment described below.

In addition, in the packaging box 10 according to this embodiment, the bottom wall portion 30 is formed by butting the folded edges of the pair of outer first bottom flap portions 31a, 31b and the pair of inner second bottom flap portions 32a, 32b at the pair of seventh edges L7 and the pair of eighth edges L8, respectively, as shown in Figs. 1 to 3, and then applying sealing tape or the like.

Furthermore, in this embodiment, as shown in Figs. 1 to 3, a pair of air holes 41 are formed in the first side wall portions 11a, 11b, a handle hole 52 is formed in the second side wall portions 12a, 12b, and drainage holes 61, 62 are formed in the first bottom flap portions 31a, 31b and the second bottom flap portions 32a, 32b. In the present invention, it is also possible to allow a configuration in which one air hole 41 is formed in either the first side wall portions 11a, 11b, or a configuration in which one drainage hole is formed in either the first bottom flap portions 31a, 31b and the second bottom flap portions 32a, 32b.

In this embodiment, the additional creases AL1, AL2 and/or the auxiliary creases SL1, SL2 may be something like weakened lines, but in order to achieve the effects of the present invention, lead creases are preferred. Lead creases are creases with intermittent cuts made in them. In the present invention, the additional creases AL1, AL2 and/or the auxiliary creases SL1, SL2 may be creases that are applied by pressing from one direction.

<Blank>
In the blank (also called blank sheet) 10B of the packaging box 10 in this embodiment, as shown in FIG. 3, the first side plate 11a forming one of the pair of first side walls 11 is connected to the second side plate 12a forming one of the pair of second side walls 12 via the first folding line L1. The second side plate 12a is connected to the third side plate 11b forming the other of the pair of first side walls 11 via the second folding line L2, and the third side plate 11b is connected to the fourth side plate 12b forming the other of the pair of second side walls 12 via the third folding line L3. The blank 10B according to this embodiment includes a joint 13 for connecting the first side plate 11a and the fourth side plate 12b. The joint 13 is connected to the first side plate 11a via the fourth folding line L4. The joint 13 may be connected from the fourth side plate 12b instead of the first side plate 11a. In this embodiment, as shown in FIG. 3, the small pieces are connected to the joint margins 13 via folding lines.

In blank 10B of this embodiment, as shown in FIG. 3, the pair of first top surface flap portions 21a, 21b are connected to the pair of first side wall portions 11 (i.e., first side panel 11a and third side panel 11b) via the upper edges of the pair of first side wall portions 11, i.e., via a pair of fifth fold lines L5, and the pair of second top surface flap portions 22a, 22b are connected to the pair of second side wall portions 12 (i.e., second side panel 12a and fourth side panel 12b) via the upper edges of the pair of second side wall portions 12, i.e., via the sixth fold line L6. In addition, the pair of first bottom flap portions 31a, 31b are connected to the pair of first side wall portions 11 (i.e., the first side plate 11a and the third side plate 11b) via the lower edges of the pair of first side wall portions 11, i.e., the seventh fold line L7, and the pair of second bottom flap portions 32a, 32b are connected to the pair of second side wall portions 12 (i.e., the second side plate 12a and the fourth side plate 12b) via the lower edges of the pair of second side wall portions 12, i.e., the eighth fold line L8.

In the blank 10B of this embodiment, as shown in FIG. 3, a pair of first top flap portions 21a, 21b are each formed with a pair of first additional creases AL1 parallel to the pair of fifth fold lines L5 on the leading edge side of the pair of fifth fold lines L5, and a pair of second top flap portions 22a, 22b are each formed with a pair of second additional creases AL2 parallel to the pair of sixth fold lines L6 on the leading edge side of the pair of sixth fold lines L6.

With this configuration, when fruits or vegetables are placed in the packaging box 10 and the fruits or vegetables extend upward beyond the pair of fifth fold lines L5 and the pair of sixth fold lines L6, the pair of first top surface flaps 21a, 21b and the pair of second top surface flaps 22a, 22b can be folded at the pair of first additional creases AL1 and the pair of second additional creases AL2, making it possible to accommodate the fruits or vegetables in the packaging box 10 (see FIG. 2). In other words, folding at the additional creases AL1 and AL2 for packaging creates more height leeway than usual.

In addition, in blank 10B in this embodiment, as shown in FIG. 3, a pair of first auxiliary creases SL1 are formed in a V-shape on the leading edge side of the pair of first additional creases AL1 on the pair of first top surface flap portions 21a, 21b, and a pair of second auxiliary creases SL2 are formed in a V-shape on the leading edge side of the pair of second additional creases AL2 on the pair of second top surface flap portions 22a, 22b.

With this configuration, when the fruit or vegetable is placed in the packaging box 10 and protrudes upward beyond the pair of fifth fold lines L5 and the pair of sixth fold lines L6, the pair of first top surface flaps 21a, 21b and the pair of second top surface flaps 22a, 22b can be folded at the pair of first additional creases AL1 and the pair of second additional creases AL2, and further folded at the pair of first auxiliary creases AL1 and the pair of second auxiliary creases AL2, thereby making it possible to accommodate the fruit or vegetable in the packaging box 10 (see FIG. 2). That is, with this configuration, when sealing, the first folded top surface flap portion can be easily pulled out from under the last folded top surface flap portion, and the shape of the Chinese cabbage M in the packaging box 10 can be easily fitted when sealing. By providing auxiliary lines SL1 and SL2, it is possible to suppress the resilience of the top flap of a sturdy packaging box when it is folded, and to improve the effectiveness of the seal.

In the blank 10B of this embodiment, the first fold line L1 to the fourth fold line L4 are set to be vertical creases (so-called creases) of the cardboard, and the fifth fold line L5 to the eighth fold line L8 are set to be horizontal creases (so-called scores) of the cardboard. Note that the direction in which the creases are formed is not limited to this, and they may be formed in any direction as long as the object of the present invention can be achieved.

<Assembly>
In this embodiment, in the case of a normal packaging box 10 containing fruit or vegetable M, the blank 10B shown in FIG. 3 is folded at each fold line and attached to the third side panel 11b at the seam 13 to close the bottom side. Regarding the top side, for example, the second top flap portion 22a, which is the short side, is first folded at the sixth fold line L6, and then the first top flap portion 21a is folded at the fifth fold line L5 so that the back side of the other end surface of the first top flap portion 21a, which is the long side, overlaps with the front side of one end surface of the folded second top flap portion 22a. Then, the first top flap portion 21a is folded at the fifth fold line L5 so that the back side of the other end surface of the folded second top flap portion 22a overlaps with the front side of one end surface of the folded second top flap portion 22a. The second top surface flap portion 22b is folded at the sixth fold line L6 so that the back side of the other end surface of the second top surface flap portion 22b, which is the short side, overlaps on the front side of one end surface, and then the first top surface flap portion 21b is folded at the fifth fold line L5 so that the back side of the other end surface of the first top surface flap portion 21b, which is the long side, overlaps on the front side of one end surface of the second top surface flap portion 22b.Then, the other end surface of the second top surface flap portion 22a is pulled up (pulled up) so that the front side of one end surface of the first top surface flap portion 21b overlaps under the back side of the other end surface of the second top surface flap portion 22a, and rotation is stopped to complete the packaging box 10 as shown in Figure 1. The rotation stopper can be used when closing a cardboard packaging box having top flaps of a length that can be butted together, rather than a short flap configuration as in this embodiment, without a sealing tape (e.g., packing tape) when moving. The folding order of the rotation stopper can be either left or right because the folding lines (auxiliary creases) are symmetrical in this embodiment. In this embodiment, it is clockwise as shown in FIG. 1 (or FIG. 3). Of course, in this invention, the rotation stopper can be either left or right, even if the auxiliary creases are symmetrical or asymmetrical. In this embodiment, the top flap part where the fold starts is the second top flap part 22a, but in this invention, it can be anywhere (from the second top flap part 22b or the longer first top flap part 21a, 21b). The folding order of the rotation stopper and the top flap part where the fold starts are the same as those of the packaging box 10 when full, which will be described next, and the second embodiment described later.

In this embodiment, when the packaging box 10 is full and contains fruits and vegetables M, the blank 10B shown in FIG. 3 is folded at each fold line in the same manner as in normal packaging, and is glued to the third side panel 11b at the seam 13 to close the bottom side. As for the top side, unlike normal packaging, the top flap portions 21a, 21b, 22a, and 22b are folded in such a way that, for example, the second top flap portion 22a, which is the short side, is first folded at the second additional line AL2, and the first top flap portion 21a is folded at the first additional line AL1 so that the back side of the other end surface of the first top flap portion 21a, which is the long side, overlaps with the front side of one end surface of the folded second top flap portion 22a, and then the back side of the other end surface of the second top flap portion 22b, which is the short side, overlaps with the front side of one end surface of the first top flap portion 21a. 2 is completed by folding the second top flap portion 22b at the second additional crease line AL2, folding the first top flap portion 21b at the first additional crease line AL1 so that the back side of the other end surface of the first top flap portion 21b, which is the long side, overlaps the front side of the one end surface of the second top flap portion 22b, and pulling up (pulling up) the other end surface of the second top flap portion 22a so that the front side of one end surface of the first top flap portion 21b overlaps under the back side of the other end surface of the second top flap portion 22a, and stopping the rotation. At this time, since the auxiliary creases SL1 and SL2 are present in this embodiment, it is easy to fold at the auxiliary creases SL1 and SL2 and pull out the second top flap portion 22a, which is folded first, from under the first top flap portion 21b, which is folded last, to seal the box. Additionally, auxiliary lines SL1 and SL2 are folded to fit the contours of the fruits and vegetables being stored, allowing top flap portions 21a, 21b, 22a, and 22b to function effectively as lids.

According to this embodiment, by providing additional lines AL1, AL2 and auxiliary lines SL1, SL2 on the top flap portions 21a, 21b, 22a, 22b of the packaging box 10, it becomes possible to effectively store fruits and vegetables whose size changes depending on the growth condition, place of production, etc.

In addition, according to this embodiment, the auxiliary lines SL1 and SL2 reduce the rebound of the top flap portions 21a, 21b, 22a, and 22b when sealing, making it easier to seal. In other words, if the top flap portions 21a, 21b, 22a, and 22b of the packaging box 10 are sturdy, the rebound will become stronger when they are bent. Therefore, the auxiliary lines SL1 and SL2 can suppress this and improve the effectiveness of sealing.

Figure 4 is a plan view for explaining the preferred range of the inclination angle of the auxiliary line relative to the additional line according to this embodiment. In this embodiment, the inclination angle of the auxiliary line SL1 (or SL2) relative to the additional line AL1 (or AL2) is preferably α degrees to β degrees (in the range of γ degrees) in order to achieve the effect of this embodiment, as shown in Figure 4. For example, α is 30, β is 75, and γ is 45. When the inclination angle of the auxiliary line SL1 (or SL2) relative to the additional line AL1 (or AL2) is about 75 degrees or more, it approaches parallel to the grain direction of the cardboard (90 degrees) and is pulled in the grain direction, reducing the effect of this embodiment. When it is about 30 degrees or less, it approaches the direction of the folding line (or additional line) of the top flap part (0 degrees) and is pulled in the same way, reducing the effect of this embodiment. In this embodiment, as shown in FIG. 4, of the pair of V-shaped auxiliary creases SL1 (or SL2) formed on the top flap portions 21a, 21b (or 22a, 22b) of the blank 10B in FIG. 3, the inclination angle of the left auxiliary crease SL1 (or SL2) has been described, but the same is true for the right auxiliary crease SL1 (or SL2) (the same is true for the second embodiment described below, which has a pair of inverted V-shaped auxiliary creases on one top flap portion).

In addition, in this embodiment, the thickness of the blank 10B of the packaging box 10 is preferably about 5 mm (e.g., 3 mm to 7 mm) in order to achieve the effects of the present invention (the same applies to the second embodiment described below).

Second Embodiment
In the second embodiment of the present invention, unlike the first embodiment, the auxiliary lines SL1 and SL2 are shaped like an inverted V, which makes it difficult for the top flap portion to come off after sealing.

Figure 5 is a perspective view of a packaging box according to a second embodiment of the present invention in a normal state in which fruits and vegetables are contained, Figure 6 is a perspective view of a packaging box according to this embodiment in a full state in which fruits and vegetables are contained, and Figure 7 is a plan view of a blank when the packaging box according to this embodiment is unfolded. Among the elements constituting the packaging box 10' according to this embodiment, those having similar functions are given the same reference numerals as in the first embodiment, and their description will be omitted.

As shown in Figs. 5 to 7, the packaging box 10' according to this embodiment, like the first embodiment, includes a pair of opposing first side wall portions 11a, 11b, a pair of second side wall portions 12a, 12b opposing in a direction perpendicular to the first side wall portions 11a, 11b, a pair of first top surface flap portions 21a, 21b extending from upper edges L5 of the pair of first side wall portions 11a, 11b and perpendicular to the first side wall portions 11a, 11b, a pair of second top surface flap portions 22a, 22b extending from upper edges L6 of the pair of second side wall portions 12a, 12b and perpendicular to the second side wall portions 12a, 12b, and a pair of first top surface flap portions 21a, 21b and a pair of second top surface flap portions 22a, 22b. a, 22b, and a bottom wall portion 30 facing the second top surface flap portions 22a, 22b, and the pair of first top surface flap portions 21a, 21b and the pair of second top surface flap portions 22a, 22b are prevented from rotating so that the second top surface flap portions 22a, 22b are sandwiched at their respective ends and the first top surface flap portions 21a, 21b are sandwiched at their respective ends, thereby giving the pair of first top surface flap portions 21a, 21b and the pair of second top surface flap portions 22a, 22b a rectangular parallelepiped shape, and additional lines AL1, AL2 are formed on the pair of first top surface flap portions 21a, 21b and the pair of second top surface flap portions 22a, 22b, respectively, parallel to the upper edge and further toward the tip of the upper edge. Also, as shown in Figures 5 to 7, the packaging box 10' according to this embodiment differs from the first embodiment in that auxiliary lines SL1 and SL2 are formed in an inverted V-shape on the leading edge side of the formed lines on the pair of first top surface flap portions 21a, 21b and the pair of second top surface flap portions 22a, 22b.

As shown in FIG. 7, in the blank 10B' of the packaging box 10' in this embodiment, unlike the first embodiment, a pair of first auxiliary lines SL1 are formed in an inverted V shape on the leading edge side of the pair of first additional lines AL1 on the pair of first top flap portions 21a, 21b, and a pair of second auxiliary lines SL2 are formed in an inverted V shape on the leading edge side of the pair of second additional lines AL2 on the pair of second top flap portions 22a, 22b.

With this configuration, when the fruit or vegetable M is placed in the packaging box 10' and it protrudes upward beyond the pair of fifth fold lines L5 and the pair of sixth fold lines L6, the pair of first top surface flap portions 21a, 21b and the pair of second top surface flap portions 22a, 22b can be folded at the pair of first additional lines AL1 and the pair of second additional lines AL2, and further folded at the pair of first auxiliary lines AL1 and the pair of second auxiliary lines AL2, thereby making it possible to successfully store the fruit or vegetable M in the packaging box 10' (see Figure 6).

In this embodiment, in the case of a normal packaging box 10' containing fresh produce M, as in the first embodiment, the blank 10B' shown in FIG. 7 is folded at each fold line and attached to the third side panel 11b at the seam 13 to close the bottom side, and the top side is folded at the pair of fifth fold lines L5 and the pair of sixth fold lines L6 at the top flap portions 21a, 21b, 22a, and 22b as described in the first embodiment, and rotation is prevented, to complete the packaging box 10' as shown in FIG. 5.

In this embodiment, when the packaging box 10' is full of fruit and vegetables M, the blank 10B' shown in FIG. 7 is folded at each fold line in the same manner as in normal cases, and is attached to the third side panel 11b at the seam 13 to close the bottom side. As for the top side, unlike normal cases, the top flap portions 21a, 21b, 22a, and 22b are folded at a pair of first additional lines AL1 and a pair of second additional lines AL2 as described in the first embodiment, and rotation is prevented, to complete the packaging box 10' as shown in FIG. 6. At this time, in this embodiment, the auxiliary lines SL1 and SL2 are in an inverted V shape, so that the top flap portions 21a, 21b, 22a, and 22b are less likely to come loose after sealing.

According to this embodiment, by providing additional lines AL1, AL2 and auxiliary lines SL1, SL2 on the top flap portions 21a, 21b, 22a, 22b of the packaging box 10', it becomes possible to effectively store fruits and vegetables whose size changes depending on the growing conditions, place of production, etc., just like in the first embodiment.

In addition, according to this embodiment, as in the first embodiment, the auxiliary lines SL1 and SL2 soften the rebound of the top flap portions 21a, 21b, 22a, and 22b when sealing, making it easier to seal.

Figure 8 is a plan view for explaining the preferred range of the inclination angle of the auxiliary crease relative to the additional crease according to this embodiment. In this embodiment, the inclination angle of the auxiliary crease SL1 (or SL2) relative to the additional crease AL1 (or AL2) is preferably δ degrees to ε degrees (in the range of ζ degrees) in order to achieve the effect of this embodiment, as shown in Figure 8. For example, δ is 30, ε is 75, and ζ is 45. If the inclination angle of the auxiliary crease SL1 (or SL2) relative to the additional crease AL1 (or AL2) is about 75 degrees or more, it approaches parallel to the grain direction of the cardboard (90 degrees) and is pulled in the grain direction, reducing the effect of this embodiment. If it is about 30 degrees or less, it approaches the direction of the folding line (or additional crease) of the top flap portion (0 degrees) and is pulled in the same way, reducing the effect of this embodiment.

＜Other＞
The present invention is not limited to the above-described embodiment or the modified examples described throughout the specification, and appropriate changes and modifications can be made without departing from the technical concept of the present invention.

For example, the packaging boxes according to the above embodiments are so-called Type A (JIS Z 1507 02) cardboard boxes, but the present invention can be used with a variety of packaging boxes that have a top flap portion.

In addition, the packaging boxes and blanks in the above embodiments are made of cardboard, but are not limited to this material and may be made of any material that can achieve the effects of the present invention, such as cardboard or plastic.

The packaging boxes in the above embodiments have so-called short flaps, but the present invention can also be used with packaging boxes that have flaps that are long enough to butt together at their leading edges, rather than short flaps. However, considering how easily the top flap portion can be prevented from rotating, short flaps are preferable.

Furthermore, although the cardboard sheets constituting the packaging boxes in each of the above embodiments are single-flute, in the present invention they may be double-flute.

In the packaging boxes according to the above embodiments, the length in the direction along the upper edge L5 of the first top surface flap portions 21a, 21b on the length side is longer than the length in the direction along the upper edge L6 of the second top surface flap portions 22a, 22b on the width side, but in the present invention, the lengths may be the same. However, when considering the ease of preventing rotation, it is better for the lengths to be different.

Although the packaging box according to each of the above embodiments is designed to store three pieces of fruit and vegetables in two tiers, the present invention is not limited to this and can be used in various storage configurations, such as three pieces in three tiers (e.g., 20 kg). Furthermore, as mentioned above, the items stored in the packaging box according to the present invention are not limited to Chinese cabbage. If the items to be stored are radishes, the packaging box can be designed to be flat with a reduced height, capable of storing, for example, three radishes in one tier.

The packaging boxes according to each of the above embodiments can of course be stacked for use.

10, 10' Packaging box 10B, 10B' Blank 11a, 11b First side wall portion 12a, 12b Second side wall portion 13 Seam 21a, 21b First top flap portion 22a, 22b Second top flap portion 30 Bottom wall portion 31a, 31b First bottom flap portion 32a, 32b Second bottom flap portion 41 Air hole 52 Handle hole 61, 62 Drainage hole M Item (fruit or vegetable)
L1 to L8: First to eighth folding lines (first to eighth edges)
AL1 First additional ruled line AL2 Second additional ruled line SL1 First supplementary ruled line SL2 Second supplementary ruled line

Claims (3)

A pair of opposing first side wall portions;
A pair of second side walls facing each other in a direction perpendicular to the first side walls;
a pair of first top flap portions each extending from an upper side of the pair of first side wall portions and perpendicular to the first side wall portions;
a pair of second top flap portions each extending from an upper side of the pair of second side wall portions and perpendicular to the second side wall portions;
a bottom wall portion facing the pair of first top surface flap portions and the pair of second top surface flap portions,
A packaging box having a rectangular parallelepiped shape by preventing rotation between the pair of first top surface flap portions and the pair of second top surface flap portions so that the second top surface flap portion is sandwiched between the respective ends of the pair of first top surface flap portions and the first top surface flap portion is sandwiched between the respective ends of the pair of second top surface flap portions,
An additional line is formed on each of the pair of first top surface flap portions and the pair of second top surface flap portions parallel to the upper side and on a leading edge side of the upper side,
A packaging box characterized in that an auxiliary crease is formed in a V-shape or an inverted V-shape on the leading edge side of each of the pair of first top flap portions and the pair of second top flap portions. An air hole is formed in the first side wall portion,
The second side wall portion has a handle hole formed therein.
2. The packaging box according to claim 1, wherein the bottom wall portion is formed with a drain hole. The packaging box according to claim 1 or 2, characterized in that the additional crease and/or the auxiliary crease is a lead crease.

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