JP6834503B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box.

Some corrugated cardboard packaging boxes are provided with a square tubular body, a bottom plate, and a top plate, and perforations are formed on the front, rear, left, and right edges of the top plate (see, for example, Patent Document 1). .. In such a packaging box, the entire upper surface of the packaging box can be opened by cutting open the perforations and separating the top plate from the body portion.

Utility Model Registration No. 3176475

In the conventional packaging box described above, since the opening start portion of the top plate is formed on the wall portion of the body portion, when the top plate is separated from the body portion, a part of the wall portion is cut off together with the top plate. Therefore, the conventional packaging box has a problem that the strength of the wall portion is lowered at the time of opening and it is difficult to secure a space for forming a clue hole in the wall portion.

An object of the present invention is to provide a packaging box that solves the above-mentioned problems, prevents the strength from being lowered at the time of opening, and facilitates the formation of a clue hole.

In order to solve the above problems, the present invention comprises a packaging box having a tubular body having front and rear end walls and left and right side walls, and a bottom plate that closes the lower opening of the body. It includes a top plate that closes the upper opening of the body portion. The top plate is connected to an inner flap connected to the upper edge of the end wall via a first cutting guide wire, and to the upper edges of the left and right side walls via a second cutting guide wire. It is equipped with left and right outer flaps that are stacked on the upper surface of the inner flap. The inner flap is formed with an opening start portion defined by a third cutting guide line formed in parallel with the first cutting guide line. A gap is formed between the upper edge of the end wall and the edge of the outer flap, and the gap and the opening start portion are formed from the left edge to the right edge of the inner flap. , The opening start portion is exposed in the gap.

When opening the packaging box of the present invention, the opening start portion exposed in the gap is separated from the inner flap to form an opening in the inner flap. Then, by putting a hand in the opening of the inner flap and pulling up the top plate, the entire top plate can be separated from the upper edge of the body portion, and the entire upper surface of the packaging box can be opened.
In the packaging box of the present invention, since the opening start portion is formed on the inner flap of the top plate, a part of the body portion is not cut off when the top plate is separated from the body portion. Therefore, in the packaging box of the present invention, it is possible to prevent the strength of the wall portion of the packaging box from being lowered at the time of opening, and it is easy to form a clue hole in the wall portion of the packaging box.

In packaging box described above, to form the gap and the open trigger to the right of the edge from the edge of the left side of the inner flap. In this configuration, when the opening start portion is separated from the inner flap, one side of the top plate is separated from the body portion, so that the top plate can be easily pulled up.

In the packaging box of the present invention, since the entire upper surface of the packaging box can be opened without cutting off a part of the wall portion at the time of opening, it is possible to prevent the strength from being lowered at the time of opening and to easily form a clue hole. Become.

It is a perspective view which looked at the packaging box which concerns on 1st Embodiment of this invention from the front upper left. It is a perspective view which looked at the packaging box which concerns on 1st Embodiment of this invention from the rear right lower part. It is a figure which showed the blank sheet of the packaging box which concerns on 1st Embodiment of this invention. It is a figure which showed the procedure of opening the packaging box which concerns on 1st Embodiment of this invention, (a) is the perspective view of the stage which separated the opening start part, (b) is the perspective view of the stage which separated the top plate. .. It is a perspective view which looked at the state which opened the packaging box which concerns on 1st Embodiment of this invention from the front upper left. It is a perspective view which looked at the packaging box which concerns on the reference example of this invention from the front upper left. It is a figure which showed the procedure of opening the packaging box which concerns on the reference example of this invention, (a) is the perspective view of the stage where the opening start part was separated, (b) is the perspective view of the stage where the top plate was separated.

Embodiments and reference examples of the present invention will be described in detail with reference to the drawings as appropriate.
In the description of the implementation form and reference examples, the same reference numerals are for the same elements, redundant description will be omitted.
In the following description, the longitudinal and lateral directions, by which on explaining the packing box implementation embodiment and the reference example, the inner flap 21 from the upper edge of the front of the front end wall 11 is disconnected, the upper edge of the front end wall 11 An opening S2 is formed between the portion and the inner flap 21 on the front side.

[First Embodiment]
As shown in FIGS. 1 and 2, the packaging box 1A of the first embodiment includes a body portion 10 formed in a square cylinder shape, a bottom plate 30 that closes a lower opening of the body portion 10, and a body. A type A corrugated cardboard box including a top plate 20 that closes the upper opening of the portion 10.

As shown in FIG. 3, the packaging box 1A is formed by folding a blank sheet S obtained by cutting out a single corrugated cardboard sheet into mountain folds or valley folds at each ruled line. The blank sheet S shown in FIG. 3 is arranged so that the outer surface side can be seen.
Each ruled line (folded line) of the blank sheet S is a linear groove formed by pushing the surface of the blank sheet S. A notch may be formed in the ruled line. In this way, the blank sheet S can be easily bent at the ruled line.

As shown in FIG. 1, the body portion 10 includes a pair of front and rear end walls 11 and rear end walls 12, and a pair of left and right left and right wall 13 and right side walls 14. The front end wall 11, the rear end wall 12, the left side wall 13, and the right side wall 14 are square wall portions, respectively.

A left side wall 13 is continuously provided on the left edge portion of the front end wall 11 via a ruled line L1.
The left side wall 13 extends rearward from the left edge of the front end wall 11. The left side wall 13 is formed perpendicular to the front end wall 11.

As shown in FIG. 2, a rear end wall 12 is continuously provided on the trailing edge of the left side wall 13 via a ruled line L2.
The rear end wall 12 extends to the right from the trailing edge of the left side wall 13. The rear end wall 12 is formed perpendicular to the left side wall 13. The rear end wall 12 has the same shape as the front end wall 11.

A right side wall 14 is continuously provided on the right edge of the front end wall 11 via a ruled line L3.
The right side wall 14 extends rearward from the right edge of the front end wall 11. The right side wall 14 is formed perpendicular to the front end wall 11. The right side wall 14 has the same shape as the left side wall 13.

A joint piece 15 is continuously provided at the trailing edge of the right side wall 14 via a ruled line L4 (see FIG. 3). The joint piece 15 is formed in a band shape along the trailing edge of the right side wall 14. The joint piece 15 is a portion to be joined to the right end portion of the inner surface of the rear end wall 12 by an adhesive.

When the blank sheet S (see FIG. 3) is bent along the ruled lines L1 to L4 and the joining piece 15 is joined to the inner surface of the rear end wall 12, the front end wall 11, the left side wall 13, the rear end wall 12 and the right side wall 14 form a quadrangle. A square tubular body portion 10 is formed.

As shown in FIG. 1, a handle hole 16 is formed in the upper part of the front end wall 11. The handle hole 16 is an oval through hole whose left and right ends are formed in a semicircular shape. The handle hole 16 is a portion for inserting a hand when lifting the packaging box 1A.
In the state of the blank sheet S (see FIG. 3), the inside of the handle hole 16 is closed by the lid plate 16a. The upper edge portion of the lid plate 16a is connected to the front end wall 11 via a ruled line, and the other edge portion of the lid plate 16a is separated from the front end wall 11 by a slit.
Further, as shown in FIG. 2, a handle hole 16 is formed in the upper part of the rear end wall 12 as well as the front end wall 11.

As shown in FIG. 1, a cutout portion 17 is formed on the left side wall 13. The cut portion 17 is a substantially quadrangular region partitioned in the left side wall 13 by the fourth cutting guide line L11.
The fourth cutting guide line L11 is a perforated line in which cuts are formed intermittently. The interval and shape of the cuts of the fourth cutting guide line L11 are not limited.

The cutout portion 17 is formed in the central portion in the left-right direction of the left side wall 13, and is formed from the upper edge portion of the left side wall 13 to the substantially central portion in the height direction of the left side wall 13.
When the fourth cutting guide line L11 is cut open and the cut portion 17 is separated from the left side wall 13, a recess portion 17a is formed in the upper part of the left side wall 13 as shown in FIG.
As shown in FIG. 2, a cutout portion 17 is formed on the right side wall 14 as well as on the left side wall 13.

As shown in FIG. 2, the bottom plate 30 closes the lower opening of the body portion 10. The bottom plate 30 has a pair of front and rear flaps 31, 31 connected to the lower edges of the front end wall 11 and the rear end wall 12, and a pair of left and right flaps connected to the lower edges of the left side wall 13 and the right side wall 14. 32, 32 and.
The left and right flaps 32, 32 are superposed on the lower surfaces of the front and rear flaps 31, 31, and the left and right flaps 32, 32 are butted against each other. The lower surfaces of the front and rear flaps 31, 31 and the upper surfaces of the left and right flaps 32, 32 are adhered by an adhesive means such as hot melt.

As shown in FIG. 1, the top plate 20 closes the upper opening of the body portion 10. The top plate 20 includes a pair of front and rear inner flaps 21 and 22, and a pair of left and right outer flaps 23 and 23.

The inner flap 21 on the front side is continuously provided on the upper edge of the front end wall 11 via the first cutting guide wire L21 (see FIG. 3).
The first cutting guide line L21 is a perforated line in which cuts are intermittently formed in the ruled line. The notch spacing and shape of the first cutting guide line L21 are not limited.
The inner flap 21 on the front side is formed in a quadrangular shape, and the width in the left-right direction is formed to be the same as the width in the left-right direction of the front end wall 11.
The inner flap 21 on the front side extends rearward from the upper edge portion of the front end wall 11. The inner flap 21 on the front side is formed perpendicular to the front end wall 11. The length of the inner flap 21 on the front side in the front-rear direction is formed to be about 1/3 of the length in the front-rear direction of the left and right side walls 13 and 14.

A third cutting guide line L22 is formed at the base of the inner flap 21 on the front side (a portion on the front end wall 11 side) in parallel with the upper edge portion (first cutting guide line L21) of the front end wall 11. The third cutting guide line L22 is formed over the left and right edges of the inner flap 21 on the front side.
The third cutting guide line L22 is a perforated line in which cuts are formed intermittently. The notch spacing and shape of the third cutting guide line L22 are not limited.

An opening start portion 25A is formed between the first cutting guide line L21 and the third cutting guide line L22, which are arranged side by side at intervals in the front and rear.
The opening start portion 25A is a band-shaped portion formed along the upper edge portion (first cutting guide line L21) of the front end wall 11. The opening start portion 25A is partitioned in the inner flap 21 on the front side by the third cutting guide line L22. The opening start portion 25A is formed from the left edge portion of the front inner flap 21 to the right edge portion.

As shown in FIG. 4A, when the first cutting guide line L21 and the third cutting guide line L22 are cut open and the opening start portion 25A is separated from the front inner flap 21, the front inner flap 21 becomes the front end wall 11. Separated from the upper edge.

As shown in FIG. 1, the rear inner flap 22 is connected to the upper edge of the rear end wall 12 via the first cutting guide line L21. The inner flap 22 on the rear side has a shape symmetrical to that of the inner flap 21 on the front side. The inner flap 22 on the rear side is different from the inner flap 21 on the front side in that the opening start portion 25A is not formed.

The outer flap 23 on the left side is formed in a quadrangular shape, and is connected to the upper edge of the left wall 13 via a second cutting guide line L23.
The outer flap 23 on the right side has a symmetrical shape with the outer flap 23 on the left side, and is connected to the upper edge of the right side wall 14 via the second cutting guide line L23.
The second cutting guide line L23 is a perforated line in which cuts are intermittently formed in the ruled line. The notch spacing and shape of the second cutting guide line L23 are not limited.

The tip edges of the left and right outer flaps 23, 23 are butted at the central portion of the body portion 10 in the left-right direction.
The lower surfaces of the left and right outer flaps 23 and 23 are overlapped with the upper surfaces of the front and rear inner flaps 21 and 22. The lower surfaces of the left and right outer flaps 23 and 23 and the upper surfaces of the front and rear inner flaps 21 and 22 are adhered by an adhesive means such as hot melt.

The front edge portions 23a, 23a of the left and right outer flaps 23, 23 are arranged behind the upper edge portion of the front end wall 11. The front edge portions 23a, 23a of the left and right outer flaps 23, 23 are arranged behind the third cutting guide line L22.
A gap S1 is formed between the upper edge portion (first cutting guide line L21) of the front end wall 11 and the front edge portions 23a, 23a of the left and right outer flaps 23, 23. The gap S1 is a band-shaped region formed from the left edge portion of the front inner flap 21 to the right edge portion.
The lower side of the gap S1 is closed by the inner flap 21 on the front side. The opening start portion 25A of the inner flap 21 on the front side and the third cutting guide wire L22 are exposed on the upper surface side of the top plate 20 through the gap S1.

Next, the procedure for opening the packaging box 1A of the first embodiment will be described.
As shown in FIG. 4A, when the first cutting guide line L21 and the third cutting guide line L22 are cut open when pulled up from the left and right ends of the opening start portion 25A in the gap S1 from above the packaging box 1A. , The opening start portion 25A is separated from the inner flap 21 on the front side.
As a result, the inner flap 21 on the front side is separated from the upper edge portion of the front end wall 11, and the opening S2 is formed between the upper edge portion of the front end wall 11 and the inner flap 21 on the front side.

Subsequently, when the front portion of the top plate 20 is pulled up by putting a hand in the opening S2, as shown in FIG. 4 (b), both the left and right outer flaps 23 and 23 and the left and right side walls 13 and 14 are located. (Ii) The cutting guide lines L23 and L23 are cut open.
Further, after the left and right second cutting guide lines L23 and L23 are cut open, the first cutting guide line L21 between the inner flap 22 on the rear side and the rear end wall 12 is cut open to form the upper edge portion of the body portion 10. The entire top plate 20 can be separated from the top plate 20.
In this way, the packaging box 1A can be opened by opening the entire upper surface of the body portion 10 and opening the upper opening of the packaging box 1A.

When the cutout portions 17 and 17 are separated from the left and right side walls 13 and 14 after the packaging box 1A is opened, the left and right recesses 17a and 17a are formed on the left and right side walls 13 and 14 as shown in FIG. As a result, the contents can be shown to the outside through the left and right recesses 17a and 17a. In addition, the contents can be lifted through the left and right recesses 17a and 17a.

In the packaging box 1A as described above, as shown in FIG. 1, the opening start portion 25A is formed on the inner flap 21 on the front side of the top plate 20. Therefore, when the top plate 20 is separated from the body portion 10, a part of the wall portion of the packaging box 1A is not cut off, so that it is possible to prevent the strength of the wall portion of the packaging box 1A from being lowered at the time of opening.
Further, it becomes easy to arrange the handle hole 16 on the wall portion of the packaging box 1A. Further, the product name and the design can be displayed by effectively utilizing the outer surface of the wall portion of the packaging box 1A.

In the packaging box 1A of the first embodiment, as shown in FIG. 4A, when the opening start portion 25A is separated, the entire front edge portion of the top plate 20 is separated from the upper edge portion of the front end wall 11, so that the top plate 20 It is easy to pull up.

Although the first embodiment of the present invention has been described above, the present invention is not limited to the first embodiment, and can be appropriately modified without departing from the spirit of the first embodiment.
For example, in the packaging box 1A of the first embodiment shown in FIG. 1, a gap and an opening start portion may be formed in the left and right halves of the top plate 20.
Further, in the packaging box 1A of the first embodiment, a gap and an opening start portion may be formed at the rear portion of the top plate 20. Further, in the packaging box 1A of the first embodiment, gaps and opening start portions may be formed in both the front portion and the rear portion of the top plate 20.

The first cutting guide line L21, the second cutting guide line L23, the third cutting guide line L22, and the fourth cutting guide line L11 of the present embodiment are perforated lines in which cuts are intermittently formed. The cutting guide wire may be composed of a half-cut wire.

Although the packaging box 1A of the first embodiment is made of corrugated cardboard, the packaging box may be formed of various known paperboards.

[ Reference example ]
Next, the packaging box 1B of the reference example will be described.
As shown in FIG. 6, the packaging box 1B of the second embodiment has substantially the same configuration as the packaging box 1A of the first embodiment (see FIG. 1), and has a configuration of a gap S3 of the top plate 20 and an opening start portion 25B. Is different.

In the packaging box 1B of the reference example , the opening start portion 25B is formed at the central portion in the left-right direction of the inner flap 21 on the front side.
The opening start portion 25B of the reference example is partitioned by the third cutting guide line L24, and is a quadrangular region surrounded by the third cutting guide line L24 and the first cutting guide line L21.

In the packaging box 1B of the reference example , the recess 26 is formed at the abutting portion of the front edge portions 23a, 23a of the left and right outer flaps 23, 23. The recess 26 is a portion in which the front edge portions 23a, 23a of the left and right outer flaps 23, 23 are recessed toward the rear. The left half of the recess 26 is formed on the left outer flap 23, and the right half of the recess 26 is formed on the right outer flap 23.
In the packaging box 1B of the reference example , the opening start portion 25B is exposed to the upper surface side of the top plate 20 through the gap S3.

When opening the packaging box 1B of the reference example , first, as shown in FIG. 7A, when the opening start portion 25B is pushed downward from above the packaging box 1B through the gap S3, the third cutting guide line L24 is opened. It is cut open and the opening start portion 25B is separated from the inner flap 21 on the front side. As a result, an opening is formed in the inner flap 21 on the front side.

Subsequently, the top plate 20 is separated from the body portion 10 by putting a hand in the opening of the inner flap 21 on the front side and pulling up the front portion of the top plate 20. Further, as shown in FIG. 7B, the opening start portion 25B is separated from the upper edge portion of the front end wall 11.
By opening the entire upper surface of the body portion 10 in this way, the packaging box 1B can be opened.

In the packaging box 1B of the reference example as described above, as shown in FIG. 6, the gap S3 of the top plate 20 can be reduced, so that the strength of the top plate 20 before opening can be increased.

Although the reference example of the present invention has been described above, the present invention is not limited to the reference example , and can be appropriately modified without departing from the spirit of the first embodiment described above.
In the packaging box 1B of the reference example shown in FIG. 6, the shapes of the recess 26 and the opening start portion 25B are not limited. For example, recesses and opening start portions may be formed in the left and right halves of the top plate 20.

Further, the opening start portion 25B may be formed behind the upper edge portion of the front end wall 11. For example, the opening start portion 25B may be configured to be arranged in the central portion of the gap S3.

1A packaging box (first embodiment)
1B packaging box ( reference example )
10 Body 11 Front end wall 12 Rear end wall 13 Left side wall 14 Right side wall 15 Joint piece 16 Hand hole 16a Lid plate 17 Cutout 17a Indentation 18 Recess 20 Top plate 21 Front inner flap 22 Rear inner flap 23 Outer flap 23a Front edge 25A Opening start (first embodiment)
25B opening start ( reference example )
26 Recess 30 Bottom plate L21 First cutting guide line L22 Third cutting guide line (first embodiment)
L23 2nd cutting guide line L24 3rd cutting guide line ( reference example )
S blank sheet S1 gap (first embodiment)
S2 opening (first embodiment)
S3 gap ( reference example )

Claims (1)

A tubular body with front and rear end walls and left and right side walls,
A bottom plate that closes the lower opening of the body and
A top plate that closes the upper opening of the body
The top plate is
An inner flap connected to the upper edge of the end wall via the first cutting guide wire,
The left and right outer flaps, which are connected to the upper edges of the left and right side walls via a second cutting guide wire and are superimposed on the upper surface of the inner flap, are provided.
The inner flap is formed with an opening start portion defined by a third cutting guide line formed in parallel with the first cutting guide line.
A gap is formed between the upper edge of the end wall and the edge of the outer flap.
The gap and the opening start portion are formed from the left edge portion to the right side edge portion of the inner flap.
A packaging box characterized in that the opening start portion is exposed in the gap.

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