Packing box

Abstract

To provide a packing box that can prevent its hardness from decreasing even though it can form an opening that increases the visibility of the content, and can prevent the content from spilling and dripping when displayed.SOLUTION: The packing box includes: a tubular trunk part 10; a peak plate 20 that seals the opening on the upper side of the trunk part 10; and a bottom plate 30 that seals the opening on the bottom side of the trunk part 10. The peak plate 20 has two first cut guiding lines L11, L11 formed thereon that extend in the cross direction, and at least one side face of the trunk part 10 has two second cut guiding lines L12, L12 formed thereon that continue to the first cut guiding lines L11, L11 and extend from the peak plate 20 to the bottom plate 30. The second cut guiding lines L12, L12 are characteristically formed so as to come closer to each other as they go toward the bottom plate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A known cardboard packaging box has a cylindrical body, a top plate, and a bottom plate, and by cutting off a cutout section from the top plate to the body, part of the packaging box can be opened and the contents can be displayed as is (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-203326 Summary of the Invention [Problem to be solved by the invention]

[0004] The packaging box of Patent Document 1 has a wide opening to improve the visibility of the contents, while a cutting guide line extending horizontally is provided in the middle of the height direction of the side, and the lower part of the side is left in a band shape to prevent the contents from spilling out. However, a packaging box with a cutting guide line that crosses the body is prone to buckling due to the cutting guide line that crosses the body, reducing its strength, and there is a risk that the packaging box will be deformed by the load on top when stacked in a warehouse, etc.

[0005] The present invention aims to solve the above-mentioned problems and to provide a packaging box that can form an opening that improves the visibility of the contents while preventing a decrease in strength and that can prevent the contents from spilling out when displayed. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a device comprising a cylindrical body portion, a top plate that closes an upper opening of the body portion, and a bottom plate that closes a lower opening of the body portion, wherein two first cutting guide lines extending in a front-to-rear direction are formed on the top plate, two second cutting guide lines that are continuous with the first cutting guide lines and extend from the top plate to the bottom plate are formed on at least one side surface of the body portion, a fourth cutting guide line that connects the two first cutting guide lines to each other is formed on an end of the first cutting guide line opposite to the end that is continuous with the second cutting guide line, and a fifth cutting guide line that connects the two second cutting guide lines to each other is formed on an end of the second cutting guide line on the bottom plate side, the second cutting guide lines are formed to approach each other toward the bottom plate, and the two second cutting guide lines are curved lines that bulge in directions that move away from each other. By pulling up a top plate opening portion that is a part of the top plate, the first cutting guide wire and the fourth cutting guide wire are broken, and the top plate opening portion is separated from the top plate. By pulling an end wall opening portion that is a part of the body portion, continuous with the top plate opening portion, outward, the second cutting guide wire is broken. By breaking the fifth cutting guide wire, the end wall opening portion is separated from the body portion, and an opening is formed. A packaging box characterized by:

[0007] When opening the packaging box of the present invention, the first tear guide lines can be easily cut open by grasping the area between the two first tear guide lines and pulling that area outward. Then, by further opening the area between the two second tear guide lines outward, the side of the body portion is torn toward the bottom plate. Thus, the packaging box of the present invention has an opening that improves the visibility of the contents, allowing the packaging box to be displayed as is without removing the contents. In addition, the second cutting guide line becomes closer to the bottom end and is narrower than the width of the contents, preventing the contents from spilling out. Furthermore, since there is no cutting guide line that crosses the side of the body, a decrease in strength can be prevented. Furthermore, since the area sandwiched between the two second cutting guide wires can be easily pulled outward, the opening can be more easily formed on the side of the body.

[0010] In the packaging box, it is preferable that an opening start portion be formed at an upper edge portion of the side surface opposite to the side surface on which the second cutting guide line is formed.

[0011] In this configuration, an operator can easily grasp the area surrounded by the two first cutting guide lines by inserting his / her hand into the opening start portion of the rear end wall, thereby easily opening the container. [Effects of the Invention]

[0012] The packaging box of the present invention can provide a packaging box that can form an opening that improves the visibility of the contents while preventing a decrease in strength and preventing the contents from spilling out when displayed. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the front upper right. [Figure 2] 1 is a diagram showing a blank sheet for a packaging box according to an embodiment of the present invention; [Figure 3] 1 is a perspective view showing a state in which the opening portion of the top plate of the packaging box according to the embodiment of the present invention is opened. FIG. [Figure 4] 1 is a perspective view showing a state in which the side of the body portion of a packaging box according to an embodiment of the present invention is open. FIG. [Figure 5] 10A and 10B are diagrams showing modified examples of blank sheets for packaging boxes according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description, the front, rear, left and right directions are set for the convenience of describing the packaging box of this embodiment, and do not limit the configuration or usage state of the packaging box.

[0015] As shown in Fig. 1, the packaging box 1 of this embodiment includes a cylindrical body 10, a top plate 20 connected to the upper edge of the body 10, and a bottom plate 30 connected to the lower edge of the body 10. The packaging box 1 of this embodiment is a wrap-around cardboard box.

[0016] The packaging box 1 is formed by mountain-folding or valley-folding a blank sheet S cut out from a cardboard sheet at each crease, as shown in Fig. 2. The blank sheet S shown in Fig. 2 is arranged so that the outer surface is visible. Each crease (fold line) of the blank sheet S is a linear groove (crease) formed by pressing the surface of the blank sheet S. Incidentally, the ruled lines may be formed with intermittent notches, which makes it easier to fold the blank sheet S at the ruled lines.

[0017] Each cutting guide line formed on the blank sheet S is a perforated line formed by multiple intermittent slits. The shape and length of the slits are not limited. In addition, in each drawing showing a packaging box 1 assembled from the blank sheet S, the shape of the slits of each cutting guide line is simplified to clearly illustrate the structure of the packaging box 1.

[0018] 1, the body 10 has front and rear end walls 11, 11 and left and right side walls 12, 12. The front and rear end walls 11, 11 and the left and right side walls 12, 12 are each a rectangular flat plate. A top plate 20 is connected to the upper edge of the end wall 11 via a crease. A bottom plate 30 is connected to the lower edge of the front end wall 11 via a crease. A rear edge of the bottom plate 30 is connected to the rear end wall 11 via a crease. A band-shaped joining piece 50 is connected to the front edge of the top plate 20.

[0019] As shown in FIG. 1, the front end wall 11 is formed with left and right second cutting guide lines L12, L12, which will be described later, and an end wall opening portion 42. As shown in FIG. 2, an opening start portion 41a is formed at the upper edge of the rear end wall 11. Further, a fourth cutting guide line L14 is formed along the crease (ridge line) between the rear end wall 11 and the top plate 20, and a fifth cutting guide line L15 is formed along the crease (ridge line) between the front end wall 11 and the bottom plate 30. The opening start portion 41a is formed at a position adjacent to the fourth cutting guide line L14.

[0020] As shown in Figures 1 and 2, the right side wall 12 has front and rear lateral flaps 12a, 12b (see Figure 2) connected to the right edges of the front and rear end walls 11, 11, an upper flap 21 connected to the right edge of the top plate 20, and a lower flap 31 connected to the right edge of the bottom plate 30. The leading edges of the front and rear lateral flaps 12a, 12b are butted together. An upper flap 21 and a lower flap 31 are attached to the outer surfaces of the front and rear lateral flaps 12a, 12b.

[0021] As shown in FIG. 1, the left side wall 12 has the same configuration as the right side wall 12, and includes front and rear lateral flaps 12a and 12b, an upper flap 21, and a lower flap 31, with the upper flap 21 and the lower flap 31 attached to the outer surfaces of the front and rear lateral flaps 12a and 12b.

[0022] As shown in Fig. 1, the top plate 20 closes the upper opening of the body 10. As shown in Fig. 1, the top plate 20 is formed with left and right first cutting guide lines L11, L11 and a top plate opening portion 41. The left and right first cutting guide lines L11, L11 are formed across the front and rear edges of the top plate 20. The rear ends of the first cutting guide lines L11, L11 are connected to the fourth cutting guide line L14. That is, the fourth cutting guide line L14 is formed so as to connect the rear ends of the first cutting guide lines L11, L11 to each other. The first cutting guide line L11 and the fourth cutting guide line L14 are perforated lines formed by intermittently forming a plurality of slits, and each slit penetrates the top plate 20. The top plate opening portion 41 is an area surrounded by the left and right first cutting guide lines L11, L11, the fourth cutting guide line L14, and the front edge of the top plate 20, and has a rectangular shape.

[0023] The left and right second cutting guide lines L12, L12 are continuous from both ends of the first cutting guide lines L11, L11, and are formed across the upper and lower edges of the front end wall 11. In other words, the second cutting guide lines L12, L12 extend from the top plate 20 to the bottom plate 30.

[0024] The right second cutting guide line L12 is formed in a curved shape that bulges away from the upper left corner of the front end wall 11. The left second cutting guide line L12 is formed in a curved shape that bulges in a direction away from the upper right corner of the front end wall 11. The second cutting guide lines L12, L12 are perforated lines formed by intermittently forming a plurality of slits, each of which penetrates the front end wall 11.

[0025] The left and right second cutting guide lines L12, L12 are formed so as to approach each other toward the lower edge, that is, the length of the lower end between the second cutting guide lines L12, L12 is formed shorter than the length of the upper end. More specifically, the distance between the lower ends of the second cutting guide wires L12, L12 is preferably half or less, more preferably one-third or less, and even more preferably one-quarter or less of the distance between the upper ends. The lower ends of the second cutting guide lines L12, L12 are connected to the fifth cutting guide line L15. That is, the fifth cutting guide line L15 is formed so as to connect the lower ends of the second cutting guide lines L12, L12 to each other.

[0026] The end wall opening portion 42 is an area surrounded by the left and right second cutting guide lines L12, L12, the upper edge of the front end wall 11, and the fifth cutting guide line L15, and has a tapered shape (approximately an inverted trapezoid shape) in which the width in the left-right direction narrows as it approaches the lower edge.

[0027] 1, the bottom plate 30 closes the lower opening of the body 10. The bottom plate 30 is a rectangular flat plate, like the top plate 20.

[0028] Third cutting guide lines L13, L13 are formed on the joint piece 50 at positions corresponding to the second cutting guide lines L12, L12. That is, the third cutting guide lines L13, L13 are arranged so as to overlap with the second cutting guide lines L12, L12 in a state in which the joint piece 50 is attached to the surface of the front end wall 11. Note that when the second cutting guide lines L12, L12 are formed on the rear end wall 11, the third cutting guide lines L13, L13 may be omitted.

[0029] When opening the packaging box 1 of this embodiment, first, the opening start portion 41a of the rear end wall 11 is pushed inward of the packaging box 1. Next, as shown in Fig. 3, an operator inserts his / her fingers into the opening start portion 41a of the rear end wall 11, grasps the top plate opening portion 41, and pulls it up. This causes the fourth cutting guide line L14 to break, and the first cutting guide lines L11, L11 to break toward the front end wall 11, causing the top plate opening portion 41 to be cut off.

[0030] Next, when the separated top plate opening portion 41 is pulled further forward, the second cutting guide lines L12, L12 are broken from the top plate 20 toward the bottom plate 30. After that, when the fifth cutting guide line L15 is broken, the end wall opening portion 42 is cut off. As a result, an opening 60 is formed from the top plate 20 to the lower edge of the front end wall 11, as shown in FIG.

[0031] When the opening 60 is formed in the packaging box 1, the front and top surfaces of the contents A can be seen.

[0032] In the packaging box 1 as described above, the top plate opening portion 41 is pulled outward to open a portion of the top plate 20, and the end wall opening portion 42 is pulled outward in continuation with the top plate opening portion 41, thereby forming an opening 60 in the body portion 10. This forms an opening 60 that improves the visibility of the contents A, so that the contents A can be displayed as is without being removed from the packaging box 1. In addition, the second cutting guide line L12 approaches the lower end and becomes narrower than the width of the contents A, so that the lower part of the contents A is pressed down and the contents A are prevented from spilling out. Furthermore, since there is no cutting guide line that crosses the side of the body 10, a decrease in strength can be prevented.

[0033] In the packaging box 1 of this embodiment, as shown in FIG. 1, the second tearing guide lines L12, L12 are curved, so that the end wall opening portion 42 surrounded by the second tearing guide lines L12, L12 can be easily opened.

[0034] In the packaging box 1 of this embodiment, as shown in Figure 2, an opening start portion 41a is formed at the upper edge of the rear end wall 11, so that an operator can insert their hand into the opening start portion 41a of the rear end wall 11.

[0035] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be modified as appropriate within the scope of the invention. 5, first cutting guide lines L11, L11 may be formed on the rear end wall 11. In this case, the opening start portion 41a may be formed on the joining piece 50 so as to open the rear end wall 11.

[0036] The packaging box 1 of this embodiment is a wrap-around type cardboard box, but the shapes of the body and lid plate of the packaging box 1 are not limited, and it may be, for example, an A-type cardboard box.

[0037] The packaging box 1 of this embodiment is made of corrugated cardboard, but the packaging box 1 can also be made of various known paperboards. [Explanation of symbols]

[0038] 1 packaging box 10. Torso 11 End Wall 12 Side wall 12a Side flap 12b Side flap 21 Upper flap 31 Lower flap 20 Top plate 30 Bottom plate 41 Top plate opening part 42 End wall opening 50 Joint piece 60 Opening L11 First cutting guide wire L12 Second cutting guide wire L13 Third cutting guide wire L14 Fourth cutting guide wire L15 Fifth cutting guide wire A. Contents

Claims

1. A cylindrical body portion; a top plate that closes an upper opening of the body portion, and a bottom plate that closes a lower opening of the body portion, The top plate is formed with two first cutting guide lines extending in the front-rear direction, Two second cutting guide lines are formed on at least one side surface of the body, the second cutting guide lines being continuous with the first cutting guide lines and extending from the top plate to the bottom plate; a fourth cutting guide line connecting the two first cutting guide lines to each other is formed at an end of the first cutting guide line opposite to an end continuing to the second cutting guide line; A fifth cutting guide line is formed at the end of the second cutting guide line on the bottom plate side, connecting the two second cutting guide lines together, The second cutting guide lines are formed so as to approach each other toward the bottom plate, and the two second cutting guide lines are curved lines that bulge in directions away from each other, By pulling up a top plate opening portion that is a part of the top plate, the first cutting guide wire and the fourth cutting guide wire are broken, and the top plate opening portion is separated from the top plate, A packaging box characterized in that the second tear guide line is broken by pulling outward an end wall tearing portion, which is part of the body portion and is continuous with the top plate tearing portion, and the fifth tear guide line is broken by cutting the end wall tearing portion from the body portion to form an opening.

2. The packaging box according to claim 1, A packaging box characterized in that an opening start portion is formed at an upper edge portion of a side surface opposite to the side surface on which the second cutting guide line is formed.

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