JP2022119263A - packaging box - Google Patents

Abstract

To provide a packaging box capable of preventing the deformation of a summit of a content due to a top plate.SOLUTION: A packaging box 1 includes: a body portion 10 that has front and rear end walls 11, 12 and left and right sidewalls 13, 14; and a top plate 20 that is provided for an opening at an upper side of the body portion 10. The top plate 20 comprises an inner flap 21 continuing with the end wall 11, and left and right outer flaps 22, 22 that are continued with both sidewalls 13, 14 and superposed over an outer surface of the inner flap 21. In the inner flap 21, a bend line L1 is formed extending in a left-right direction. The inner flap 21 is worked flattened in a portion 21b closer to a tip than the bend line L1.SELECTED DRAWING: Figure 1

Description

The present invention relates to packaging boxes.

A type A packaging box made of corrugated cardboard includes a body having front and rear end walls and left and right side walls, a top plate provided at the upper opening of the body, and a bottom opening provided at the body. and a bottom plate. The top plate of the A-type packaging box includes inner flaps connected to both end walls and outer flaps connected to both side walls, and both outer flaps are superimposed on the upper surfaces of both inner flaps. . The top plate is sealed by attaching an adhesive tape to the butted portions of both outer flaps and attaching both ends of the adhesive tape to the outer surfaces of both end walls.

When opening the top plate of a conventional A-type packaging box, after tearing the front end of the adhesive tape between the upper edge of the end wall and the front edges of both outer flaps, the adhesive tape is pulled from the front end to the rear end. The adhesive tape is peeled off from both outer flaps (see, for example, Patent Document 1).

Utility Model Registration No. 3160710

In the conventional packaging box described above, when the adhesive tape is peeled off, the operator's hand may be pressed against the upper surface of the outer flap to push down the inner flap. At this time, the tip of the inner flap is strongly pressed against the top of the contents, and the top of the contents may be deformed.
For example, when the content is a product in a gable-top container, a sealing portion is formed by sticking together the upper edges of a pair of wall members. If the inner flap is pressed against the sealing portion and the sealing portion is deformed, the appearance of the product will be spoiled.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems and to provide a packaging box that can prevent deformation of the top of the contents due to the inner flap of the top plate.

In order to solve the above-mentioned problems, the present invention provides a packaging box comprising a cylindrical body portion having front and rear end walls and left and right side walls, a top plate provided at an upper opening of the body portion, and the above-mentioned a bottom plate provided in the lower opening of the body. The top plate includes an inner flap connected to the end wall, and left and right outer flaps connected to the both side walls and superimposed on the outer surface of the inner flap. A fold line extending in the left-right direction is formed in the inner flap, and crushing processing is applied to a portion of the inner flap on the tip side of the fold line.

In the packaging box of the present invention, when other boxes are stacked on the top plate or when the top plate is opened, when a pressing force acts on the top plate from above, the inner flap is pushed down and the tip side of the inner flap is pushed down. may contact the top of the contents. At this time, in the inner flap of the packaging box of the present invention, the portion on the tip end side is bent upward with respect to the portion on the base end side at the fold line. In addition, the distal end portion of the inner flap of the packaging box of the present invention is formed thinner than the proximal end portion by crushing. As a result, in the packaging box of the present invention, the contact pressure of the tip side portion of the inner flap with respect to the top of the contents is reduced.

In the packaging box of the present invention, the contact pressure of the tip side portion of the inner flap against the top portion of the contents can be reduced without reducing the strength of the base portion side of the inner flap. In addition, when a pressing force is applied to the top plate from above, the portion on the proximal side of the inner flap is pushed down by a smaller amount than the portion on the distal side. It is difficult to touch the top.

In the packaging box described above, it is preferable that a depression is formed at the front-rear end of the butted portion of the outer flaps, and the upper surface of the inner flap is exposed in the depression.

In this configuration, when the adhesive tape is applied from the outer surfaces of the butted portions of the outer flaps to the outer surface of the end wall, the adhesive tape extends over the recessed portions. With this arrangement, the adhesive tape can be easily torn at the recess when the top plate is opened.

In addition, it is preferable that the fold line is formed closer to the tip of the inner flap than the recess so that the fold line is not exposed in the recess, thereby improving the appearance of the packaging box.

In the packaging box of the present invention, when a pressing force acts on the top plate from above and the inner flap is pushed down, the contact pressure of the inner flap with respect to the top of the contents is reduced, so that the top of the contents is deformed. can be prevented.

It is the perspective view which looked at the packaging box which concerns on embodiment of this invention from the front upper left. It is the figure which showed the blank sheet of the packaging box which concerns on embodiment of this invention. FIG. 4 is a perspective view showing a state before the outer flap is closed in the packaging box according to the embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line IV-IV of FIG. 1 showing the packaging box according to the embodiment of the present invention; FIG. 4 is a perspective view showing a state in which the adhesive tape is torn in the packaging box according to the embodiment of the present invention; It is the perspective view which showed the modification of the packaging box which concerns on embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In the following description, the front, rear, left, and right directions are set for convenience in describing the packaging box of the present embodiment, and do not limit the configuration or usage of the packaging box.

As shown in FIG. 1, the packaging box 1 of the present embodiment includes a cylindrical body 10, a top plate 20 provided at the upper opening of the body 10, and a lower opening at the body 10. It is an A-type cardboard box with a bottom plate 30 provided.

In this embodiment, as shown in FIG. 4, a case in which a plurality of containers P are accommodated in a packaging box 1 as contents will be described. In addition, the contents accommodated in the packaging box 1 of this embodiment are not limited.

The container P of the present embodiment is a gable-top liquid container for containing liquid such as milk and beverages. The container P has a bottomed prismatic main body portion P1. The upper ends of a pair of front and rear walls of the main body P1 are adhered together to form a sealing part P2, and the upper parts of the pair of right and left walls of the main body P1 are folded inward so that the top of the container P has a gable roof. formed in a mold.

The container P is accommodated in the packaging box 1 with the sealing portion P2 extending in the left-right direction. In the packaging box 1 of this embodiment, three containers P arranged in the front-rear direction are arranged in two rows on the left and right. That is, nine containers P are accommodated in the packaging box 1 of this embodiment. In addition, the number and arrangement of the containers P accommodated in the packaging box 1 are not limited.

As shown in FIG. 2, the packaging box 1 of the present embodiment is formed by mountain-folding or valley-folding a blank sheet S obtained by cutting out a corrugated cardboard sheet. The blank sheet S shown in FIG. 2 is arranged so that the inner side can be seen.
The folded lines of the blank sheet S are ruled lines (pressed lines) formed by pressing the surface of the blank sheet S linearly. In addition, you may form an intermittent notch in a ruled line. By doing so, it becomes easier to fold the blank sheet S along the folding line.
Alternatively, the folded line may be configured by intermittently forming half-cut cuts obtained by cutting only the surface of the sheet or cuts penetrating the sheet into a linear shape.

As shown in FIG. 1 , the body 10 has a pair of front and rear end walls 11 and 12 and a pair of left and right walls 13 and 14 . The front end wall 11, the rear end wall 12, the left side wall 13 and the right side wall 14 are formed in a quadrangular shape (see FIG. 2).

A left side wall 13 is connected to the left edge of the front end wall 11 via a broken line, and a rear end wall 12 is connected to the rear edge of the left side wall 13 via a broken line. A right side wall 14 is connected to the right edge of the front end wall 11 via a broken line, and a belt-like joining piece 15 is connected to the rear edge of the right side wall 14 via a broken line. The joint piece 15 is joined to the inner surface of the rear end wall 12 .

When the blank sheet S (see FIG. 2) is folded along each fold line and the joining piece 15 is joined to the inner surface of the rear end wall 12, the front end wall 11, the rear end wall 12, the left side wall 13 and the right side wall 14 are formed in plan view. A rectangular tubular body 10 is formed.

The bottom plate 30 closes the lower opening of the body 10 . The bottom plate 30 includes a pair of front and rear inner flaps 31, 31 connected to the lower edge portions of the front end wall 11 and the rear end wall 12, respectively, and left and right flaps connected to the lower edge portions of the left side wall 13 and the right side wall 14, respectively. A pair of outer flaps 32, 32 are provided.

Both outer flaps 32, 32 are overlaid on the outer surfaces (lower surfaces) of both inner flaps 31, 31, and tip edges of both outer flaps 32, 32 are butted against each other. Adhesive tape (not shown) is attached to the butted portions of the outer flaps 32 , 32 .

The top plate 20 closes the upper opening of the body 10 . The top plate 20 includes a pair of front and rear inner flaps 21, 21 connected to the upper edge portions of the front end wall 11 and the rear end wall 12, respectively, and left and right flaps connected to the upper edge portions of the left side wall 13 and the right side wall 14, respectively. A pair of outer flaps 22, 22 are provided.

The tip edges of both the inner flaps 21, 21 are spaced apart in the front-rear direction. Both outer flaps 22 , 22 are superimposed on the outer surfaces (upper surfaces) of both inner flaps 21 , 21 . The leading edge portions of the outer flaps 22 , 22 are butted against each other at the center portion in the left-right direction of the upper opening of the trunk portion 10 .

As shown in FIG. 3, the inner flap 21 on the front side of the top plate 20 is formed with a broken line L1 extending in the left-right direction. The fold line L1 is formed along the left and right edges of the inner flap 21 and is parallel to the base end edge of the inner flap 21 (upper edge of the front end wall 11).
The fold line L1 of the inner flap 21 is formed by intermittently cutting a ruled line (press ruled line) formed by linearly pressing the inner surface (lower surface) of the inner flap 21 .

The fold line L1 is formed closer to the front end wall 11 (base end side) than the central portion of the inner flap 21 in the front-rear direction. In the inner flap 21 of the present embodiment, as shown in FIG. 4, the position of the fold line L1 is set so as to be closer to the front end wall 11 than the sealing portion P2 of the container P at the forefront. In other words, the fold line L1 of the inner flap 21 is arranged closer to the proximal side than the topmost portion of the container P (contents) at the foremost portion.

As shown in FIG. 3, the inner flap 21 is divided into a base end portion 21a (a portion on the base end side) and a tip portion 21b (a portion on the tip side) with a broken line L1 as a boundary line.
A tip portion 21b of the inner flap 21 is crushed. In the present embodiment, when the blank sheet S (see FIG. 2) is formed, the inner surface of the tip end portion 21b of the inner flap 21 is pushed in, thereby increasing the thickness of the tip end portion 21b of the inner flap 21 as shown in FIG. is formed thinner than the thickness of the base end portion 21a.

As shown in FIG. 3, the inner flap 21 on the rear side and the inner flap 21 on the front side are formed symmetrically in the front-rear direction. A fold line L1 extending in the left-right direction is also formed on the rear inner flap 21 . In the inner flap 21 on the rear side, a folding line L1 is formed on the rear side of the central portion in the front-rear direction. 4, the folding line L1 of the rear inner flap 21 is arranged on the base end side (rear side) of the sealing portion P2 of the container P at the rearmost portion. Further, the front end portion 21b of the inner flap 21 on the rear side is also crushed.

As shown in FIG. 1, a recess 25 is formed at the front end of the butted portion of the outer flaps 22,22. The recessed portion 25 is a semicircular recessed portion of the front edge of the butted portion of the outer flaps 22 , 22 .
The left half quadrant of recess 25 is formed in the right front corner of left outer flap 22 and the right half quadrant of recess 25 is formed in the left front corner of right outer flap 22 . It is
The maximum lateral width of the recessed portion 25 is formed to be larger than the lateral width of the adhesive tape T, which will be described later.

A portion of the upper surface of the base end portion 21 a of the front inner flap 21 is exposed in the recessed portion 25 . The folding line L1 of the front inner flap 21 is formed on the tip side (front side) of the inner flap 21 with respect to the recessed portion 25 (see FIG. 4). Therefore, in the inner flap 21 on the front side, the fold line L1 is not exposed in the recessed portion 25, and the fold line L1 is covered with both the outer flaps 22,22.

An adhesive tape T extending in the front-rear direction is attached to the outer surfaces of the butted portions of the outer flaps 22 , 22 . A rear end portion of the adhesive tape T is attached to the upper portion of the outer surface of the rear end wall 12 . A front end portion of the adhesive tape T is attached to the upper portion of the outer surface of the front end wall 11 . The front portion of the adhesive tape T is attached to the outer surfaces of both outer flaps 22 and 22 and the outer surface of the front end wall 11 beyond the recessed portion 25 .

In the packaging box 1 of this embodiment, the adhesive tape T is attached to the top plate 20 using a cardboard box sealing device. When sealing the packaging box 1 of the present embodiment, first, after sticking one end of the adhesive tape T to the outer surface of the rear end wall 12, the adhesive tape T is pulled forward from the reel, and the outer flaps 22, It is pasted on the outer surface of the butted portion of 22 . The other end of the adhesive tape T is attached to the outer surface of the front end wall 11 . In this manner, the adhesive tape T fixes the outer flaps 22, 22 in the closed state.

When opening the top plate 20 of the packaging box 1 as described above, first, as shown in FIG. 5, the front portion of the adhesive tape T is torn horizontally.
More specifically, the front portion of the adhesive tape T before opening is pasted on the outer surface of the front end wall 11 beyond the recessed portion 25 from the outer surface of the butted portion of the outer flaps 22 , 22 . The adhesive tape T in this state is in a state within the recessed portion 25 . Then, by inserting a finger into the recessed portion 25 and hooking the finger on the adhesive tape T from the side, the front portion of the adhesive tape T can be easily torn.
After tearing off the front part of the adhesive tape T, the part behind the cut part of the adhesive tape T is pulled up toward the rear, and the adhesive tape T is peeled off from the butted part of the outer flaps 22, 22. Both outer flaps 22, 22 can be opened.

In the packaging box 1 of the present embodiment, as shown in FIG. 4, when the top plate 20 is sealed, another box body is stacked on the top plate 20, or when the top plate 20 is opened, the operator's hand touches the outer flap 22 In some cases, a pressing force acts on the top plate 20 from above, such as when the top plate 20 is pressed against the top plate 20 .
In this case, the inner flap 21 is pushed down by the outer flap 22, and the leading end 21b of the inner flap 21 may come into contact with the sealing portion P2 at the top of the container P.

In the packaging box 1 of the present embodiment, when the tip portion 21b of the inner flap 21 contacts the sealing portion P2 of the container P, the tip portion 21b of the inner flap 21 is bent upward relative to the base portion 21a along the fold line L1. That is, the inner flap 21 is deformed into a V shape when viewed from the side.
In addition, in the packaging box 1 of the present embodiment, the front end portion 21b of the inner flap 21 is formed thinner than the base end portion 21a by crushing.
As a result, in the packaging box 1 of the present embodiment, when a pressing force acts on the top plate 20 from above, the contact pressure of the tip portion 21b of the inner flap 21 against the top portion of the container P becomes smaller. Top deformation can be prevented.

In the packaging box 1 of the present embodiment, only the front end portion 21b of the inner flap 21 is subjected to crushing processing, so that the strength of the base end portion 21a of the inner flap 21 is not reduced, and the inner flap 21 is positioned against the top portion of the container P. The contact pressure of the tip portion 21b can be reduced.

When a pressing force acts on the top plate 20 from above, the base end portion 21a of the inner flap 21 is pushed down by a smaller amount than the tip portion 21b. hard to do
Furthermore, in the packaging box 1 of the present embodiment, the folding line L1 of the inner flap 21 is arranged on the base end side of the topmost portion of the container P. As shown in FIG. As a result, the distance between the lower surface of the base end portion 21a of the inner flap 21 and the top portion of the container P is increased, so that the base end portion 21a does not come into contact with the top portion of the container P.

In the packaging box 1 of the present embodiment, as shown in FIG. 1, the folding line L1 is formed on the tip side of the inner flap 21 rather than the recessed portion 25, so that the folding line L1 is not exposed in the recessed portion 25. The appearance of the packaging box 1 can be improved.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the scope of the invention.
In the packaging box 1 of this embodiment, as shown in FIG. is not limited.

For example, as shown in FIG. 6, the recessed portion 25A may be formed in a triangular shape in which the width in the left-right direction narrows from the outer side to the inner side. Alternatively, the recess may be formed in a rectangular shape with the same width in the left-right direction from the outside to the inside.

In the packaging box 1 of this embodiment, the recessed portion 25 is formed at the front end of the butted portion of the outer flaps 22, 22, but the recessed portion 25 is formed at both the front end and the rear end of the butted portion. may Alternatively, the recesses 25 may not be formed at the front and rear end portions of the butted portions of the outer flaps 22 , 22 .

In the packaging box 1 of this embodiment, the folding lines L1 are formed on the front and rear inner flaps 21, 21, respectively. good.

Although the packaging box 1 of the present embodiment is made of cardboard, the packaging box 1 can be made of various known paperboards.

1 packaging box 10 body 11 front end wall 12 rear end wall 13 left side wall 14 right side wall 15 joining piece 20 top plate 21 inner flap 21a base end 21b tip 22 outer flap 25 depression 30 bottom plate 31 inner flap 32 outer flap L1 polygonal line P container P1 body part P2 sealing part S blank sheet T adhesive tape

Claims (3)

a tubular body having front and rear end walls and left and right side walls;
a top plate provided in an opening on the upper side of the body;
a bottom plate provided in an opening on the lower side of the body,
The top plate is
an inner flap connected to the end wall;
Left and right outer flaps connected to the side walls and superimposed on the outer surface of the inner flap,
A fold line extending in the left-right direction is formed on the inner flap,
A packaging box according to claim 1, wherein the inner flap is subjected to crushing processing at a portion on the tip side of the fold line. The packaging box according to claim 1,
A depression is formed at an end in the front-rear direction of the butted portion of the outer flaps,
A packaging box, wherein an upper surface of the inner flap is exposed in the recess. The packaging box according to claim 2,
The packaging box, wherein the folding line is formed closer to the tip of the inner flap than the recessed portion.

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