JP7196742B2 - packaging box - Google Patents

Description

The present invention relates to packaging boxes.

A wraparound cardboard packaging box includes a bottom plate, a pair of left and right side walls, a top plate, and a pair of front and rear end walls. The end walls are formed by stacking left and right flaps and upper and lower flaps. ing.
In such a packaging box, cutting guide lines extend forward and rearward from an unsealing start portion of the side wall, and cut guide lines are formed on the left and right flaps continuously with the cut guide lines of the side walls. There is a thing (for example, see patent document 1).

When opening the packaging box described above, a fingertip is put on the opening starting portion of the side wall and the upper portion of the side wall is pulled up to cut open the side wall and the left and right flaps along the cutting guide lines. In this way, when the upper portion of the packaging box is cut off, the lower portion of the packaging box becomes a tray, so that the contents can be displayed in the store while being stored in the tray.

Utility Model Registration No. 3156835

In the conventional packaging box described above, when the upper part of the side wall is pulled up to cut open the cutting guide line, the lower part of the packaging box needs to be held down so that the entire packaging box is not lifted, making it difficult to open the packaging box. There is a problem.

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 be opened by easily cutting open the cutting guide lines of the side walls and end walls.

In order to solve the above problems, the present invention provides a packaging box comprising a bottom plate, a pair of left and right side walls connected to the left and right edges of the bottom plate, and a pair of left and right side walls connected to the upper edges of the both side walls. It has a top plate and a pair of front and rear end walls. The end wall is formed by overlapping left and right lateral flaps connected to the side walls with an upper flap connected to the top plate and a lower flap connected to the bottom plate. The side wall is formed with a side opening starting portion and a side cutting guide line extending from the side opening starting portion to the front and rear edges. The rear portion extends obliquely upward from the side opening start portion. A transverse cutting guide line is formed from the proximal edge to the distal edge of the lateral flap. The transverse cutting guide line has a first inclined portion extending obliquely upward continuously from the side cutting guiding line, and a second inclined portion extending obliquely downward continuously from the first inclined portion. , are formed.

In the packaging box of the present invention, when a fingertip is hooked on the side unsealing start portion and the upper portion of the side wall is pulled out in the lateral direction, the side cutting guide line is cut open in the lateral direction. At this time, since it is easy to apply a lateral force to the side wall, the side cutting guide line can be easily cut open.
Also, when the upper portion of the side wall is pulled out laterally, the angle between the upper portion of the side wall and the upper portion of the lateral flap is increased, causing the upper portion of the lateral flap to be retracted inwardly from its original position. At this time, since the front and rear parts of the side cutting guide line and the first inclined part of the lateral cutting guide line continue obliquely upward, the front and rear parts of the side cutting guide line are followed by the lateral cut. The first inclined portion of the cutting guide line is smoothly cut open.
Furthermore, by pulling up the upper portion of the side wall after cutting the first inclined portion of the transverse cutting guide line, the second inclined portion can be smoothly cut diagonally downward.
Thus, in the packaging box of the present invention, the side cutting guide line and the transverse cutting guide line can be easily cut open to cut the top from the bottom of the packaging box.

In the packaging box described above, a pair of front and rear side ruled lines extending from the side unsealing start portion toward the upper edge of the side wall is formed on the inner surface of the side wall. It is preferred that the spacing increases upwards.

In this configuration, when a fingertip is hooked on the side unsealing start portion and the upper portion of the side wall is pulled out in the lateral direction, the upper portion of the side wall is bent outward along the ruled lines on both sides. As a result, the upper portion of the side wall can be largely pulled out with a small force, so that the first inclined portions of the side-cutting guide line and the transverse-cutting guide line can be easily cut open.

In the packaging box described above, on the inner surface of the lateral flap, extending from above the connecting portion between the first inclined portion and the second inclined portion toward the upper end of the corner between the side wall and the lateral flap It is preferable to form an edge ruled line.

In this configuration, when the upper portion of the side wall is pulled out in the lateral direction, the angle between the side wall and the lateral flap increases, and the portion above the first inclined portion of the lateral flap is shifted from the original position with the end ruled line as the folding line. is pulled inward, the first inclined portion can be easily cut open.

In the packaging box of the present invention, the top unsealing start portion is formed in the central portion of the top plate, and the top cut guide line is formed from the top unsealing start portion to the front and back edges of the top plate . Further, a vertical cutting guide line is formed on the upper flap from the base edge to the tip edge, continuing from the top cutting guide line.

In this configuration, the top cutting guide line is cut open by pulling up the left and right sides of the top plate by putting a fingertip on the top unsealing start part. Furthermore, a vertical cutting guide line, a transverse cutting guide line and a side cutting guide line are sequentially cut open following the top cutting guide line. At this time, since it is easy to apply an upward force to the top plate, each cutting guide line can be easily cut open.
Then, by cutting open each cutting guide line of the packaging box, the upper part of the packaging box can be cut from the lower part in a state of being divided into left and right parts. In this way, with the configuration described above, the packaging box can be easily opened from above.

In the packaging box of the present invention, the top cutting guide line extends toward one of the left and right sides of the front edge of the top plate and extends toward the other left and right sides of the rear edge of the top plate. In addition , on the inner surface of the top plate, a first top ruled line extending toward the other left and right sides of the front edge of the top plate and a second top extending toward the left and right sides of the rear edge of the top plate forming a ruled line and

In this configuration, when the top plate is pulled up by putting a fingertip on the top unsealing start part, the top plate is bent upward with the first top ruled line and the second top ruled line as folding lines. As a result, the top plate can be largely drawn upward with a small force, so that the top cutting guide line can be easily cut open.

In the packaging box of the present invention, the upper edge portion of the side wall and the edge portion of the top plate are connected via the inclined wall . In this case, on the outer surface of the slanted wall, a front slanted ruled line extending obliquely upward rearward from the lower front corner and a ruled line extending obliquely upward forward from the lower rear corner and a rear slope ruled line .

In this configuration, when the upper part of the side wall is pulled out by putting a fingertip on the side unsealing start part, the central part of the inclined wall is bent outward along the front side inclined part ruled line and the rear side inclined part ruled line as folding lines, so that the side wall can be opened. The upper part can be pulled out greatly with a small force. As a result, even if an inclined wall is provided between the side wall and the top plate, the side cutting guide line can be easily cut open.

The packaging box of the present invention can be opened by easily cutting open the cutting guide lines of the side walls and end walls.

It is the perspective view which looked at the packaging box which concerns on 1st 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 1st embodiment of this invention. FIG. 4 is a perspective view showing a state in which the first inclined portions of the side cut guide wire and the transverse cut guide wire are cut open in the packaging box according to the first embodiment of the present invention. It is the perspective view which showed the state which divided|segmented the packaging box which concerns on 1st embodiment of this invention into up and down. Fig. 2 is a perspective view showing a state in which the packaging box according to the first embodiment of the present invention is opened from the top cutting guide line; It is the perspective view which looked at the packaging box which concerns on 2nd 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 2nd embodiment of this invention. FIG. 10 is a perspective view showing a state in which the first inclined portions of the side cut guide wire and the transverse cut guide wire are cut open in the packaging box according to the second embodiment of the present invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In addition, in description of each embodiment, the same code|symbol shall be attached|subjected regarding the same component, and the overlapping description shall be abbreviate|omitted.
In the following description, the front, rear, left, and right directions are set for convenience in describing the packaging box of each embodiment, and do not limit the configuration or usage of the packaging box.

[First embodiment]
As shown in FIG. 1, the packaging box 1A of the first embodiment includes a bottom plate 10, side walls 20, 20 connected to left and right edges of the bottom plate 10, and upper edges of the side walls 20, 20 connected to the side walls 20, 20. This is a wrap-around cardboard box provided with a top plate 30 and a pair of front and rear end walls 50, 50. - 特許庁
Although the contents accommodated in the packaging box 1A of the first embodiment are not limited, for example, a plurality of PET bottles can be accommodated as the contents.

As shown in FIG. 2, the packaging box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 obtained by cutting out one cardboard sheet along each ruled line. The blank sheet S1 shown in FIG. 2 is arranged so that the outer surface side can be seen.
Each ruled line (folded line) of the blank sheet S1 is a linear groove (press ruled line) formed by pressing the surface of the blank sheet S1. Note that intermittent slits may be formed on the ruled lines. This makes it easier to fold the blank sheet S1 along the ruled lines.

Each of the cutting guide lines formed on the blank sheet S1 is a perforated line in which notches are intermittently formed. Note that the shape and length of the cut are not limited. Further, in each drawing showing the packaging box 1A assembled from the blank sheet S1, the shape of the notch of each cutting guide line is simplified to show the structure of the packaging box 1A in an easy-to-understand manner.

The bottom plate 10 is a rectangular flat plate, as shown in FIG. A left side wall 20 is connected to the left edge of the bottom plate 10 via a ruled line, and a right side wall 20 is connected to the right edge of the bottom plate 10 via a ruled line. The left and right side walls 20 , 20 are the same rectangular walls and are formed perpendicular to the bottom plate 10 .

A top plate 30 is connected to the upper edge of the right side wall 20 via a ruled line. The top plate 30 is the same rectangular flat plate as the bottom plate 10 and is formed perpendicular to the right side wall 20 .
A connecting piece 40 is connected to the upper edge of the left side wall 20 via a ruled line. The joint piece 40 is a strip-shaped portion formed along the upper edge of the left side wall 20 .
While folding the blank sheet S1 (see FIG. 2) along the respective ruled lines, the joint piece 40 connected to the upper edge of the left side wall 20 is adhered to the inner surface of the top plate 30 to form the bottom plate 10, the left and right side walls 20, 20 and top plate 30 are formed in a square tube shape.

The front end wall 50 includes a pair of left and right lateral flaps 51, 51 connected to the front edges of the left and right side walls 20, 20, respectively, an upper flap 52 connected to the front edge of the top plate 30, and a bottom plate. and a lower flap 53 connected to the front edge of 10 .
An upper flap 52 and a lower flap 53 are overlapped and adhered to the outer surfaces of the left and right lateral flaps 51 , 51 .
The upper flap 52 and the lower flap 53 are arranged with a gap in the vertical direction, and the left and right lateral flaps 51, 51 are arranged with a gap in the left and right direction. As a result, a square opening is formed in the central portion of the front end wall 50 .

The rear end wall 50 has the same configuration as the front end wall 50 and includes a pair of left and right lateral flaps 51 , 51 , an upper flap 52 and a lower flap 53 . An upper flap 52 and a lower flap 53 are overlapped and adhered to the outer surfaces of the left and right lateral flaps 51 , 51 .

In the packaging box 1A of the first embodiment, a top portion opening start portion 61 is formed in the central portion of the top plate 30. As shown in FIG. The top opening starting portion 61 is a substantially oval opening.
In the state of the blank sheet S1 (see FIG. 2), the top opening start portion 61 is closed by the cover plate 62. As shown in FIG. The front and rear edges of the cover plate 62 are formed with cut lines formed by cutting the liner and flutes (core), and the left and right edges of the cover plate 62 are formed with ruled lines. Further, a cutting guide line extends in the front-rear direction at the central portion of the cover plate 62 in the left-right direction.

A top cutting guide line 65 is formed on the top plate 30 from the cutting guide line of the top opening start portion 61 to the front and rear edges. The top cutting guide line 65 extends linearly from the top unsealing start portion 61 toward the front left and the rear right. The top opening start portion 61 and the top cutting guide line 65 divide the entire top plate 30 into left and right.

The front end of the top cutting guide wire 65 is connected to the right of the center of the front edge of the top plate 30 . The front end of the top cutting guide line 65 is located above the leading edge (inner edge) of the right lateral flap 51 .

The rear end of the top cutting guide wire 65 is connected to the left side of the center of the rear edge of the top plate 30 . The rear end of the top cutting guide line 65 is located above the leading edge (inner edge) of the left lateral flap 51 .

Longitudinal cutting guide lines 66, 66 are formed on the front and rear upper flaps 52, 52, respectively, from the base edge (upper edge) to the tip edge (lower edge) (see FIG. 2).
The upper end of the vertical cutting guide line 66 is continuous with the end of the top cutting guide line 65 . The vertical cutting guide line 66 is formed linearly along the tip edge of the lateral flap 51 .

On the inner surface of the top plate 30, there are a first top ruled line 67a extending from the center of the top plate 30 to the left of the center of the front edge, and a first top ruled line 67a extending from the center of the top plate 30 to the right of the center of the rear edge. A second top ruled line 67b is formed (see FIG. 2).
The first top ruled line 67 a and the second top ruled line 67 b are linear grooves (pressing rules) formed by pressing the inner surface (lower surface) of the top plate 30 .
The first top ruled line 67 a is formed between the top opening start portion 61 and the front left corner of the top plate 30 . The second top ruled line 67 b is formed between the top unsealing start portion 61 and the right rear corner of the top plate 30 .

In the packaging box 1A of the first embodiment, a side opening start portion 71 is formed in the central portion of the left side wall 20. As shown in FIG. The side unsealing starting portion 71 is a substantially rectangular opening, and is arranged below the center of the side wall 20 in the vertical direction.
In the state of the blank sheet S1 (see FIG. 2), the side unsealing start portion 71 is closed by the cover plate 72. As shown in FIG. On the left and right edges of the cover plate 72, cut lines are formed by cutting the liner and the flute (center core). A cutting guide line is formed on the upper edge of the lid plate 72 , and a ruled line is formed on the lower edge of the lid plate 72 .

A side cut guide line 75 is formed on the left side wall 20 from the cut guide line of the side opening start portion 71 to the front and rear edges. The entire side wall 20 is vertically partitioned by the side opening start portion 71 and the side cutting guide line 75 .

A portion of the side cutting guide line 75 on the front side of the side opening start portion 71 includes a parallel portion 75a extending linearly along the upper and lower edges of the side wall 20, and a parallel portion 75a extending in front of the side wall 20 from the parallel portion 75a. A front portion 75b extending obliquely upward toward the edge is formed.
The parallel portion 75 a is arranged below the vertical center of the side wall 20 , and the front portion 75 b is connected to substantially the center of the front edge portion of the side wall 20 .

A parallel portion 75a and a rear portion 75c are formed at a portion of the side portion cutting guide line 75 behind the side portion opening start portion 71. As shown in FIG. The front portion and the rear portion of the side cutting guide line 75 are formed symmetrically.

A pair of front and rear side ruled lines 77 , 77 are formed on the inner surface of the left side wall 20 so as to extend from the side opening start portion 71 toward the upper edge of the side wall 20 . The side ruled line 77 is a linear groove (pressed ruled line) formed by pressing the inner surface of the side wall 20 . The horizontal interval between the left and right side ruled lines 77, 77 widens upward.

The right side wall 20 is formed with a side unsealing start portion 71 and a side cutting guide line 75 similarly to the left side wall 20, and a front portion 75b and a rear portion 75c of the side cutting guide line 75 extend obliquely upward. (See Figure 2).

The left lateral flap 51 of the front end wall 50 is formed with a transverse cutting guide line 81 that is continuous with the side cutting guide line 75 of the left side wall 20 .

The transverse cutting guide line 81 is formed from the proximal edge (left edge) to the distal edge (right edge) of the lateral flap 51 . The transverse cutting guide line 81 is formed in a region of the lateral flap 51 between the upper flap 52 and the lower flap 53 .
A recessed portion 85 is formed substantially in the center of the tip edge of the lateral flap 51 . The transverse cutting guide wire 81 is connected to the bottom of the recessed portion 85 .

The transverse cutting guide line 81 has a first inclined portion 81a extending obliquely upward continuously from the side cutting guiding line 75, and a second inclined portion extending obliquely downward continuously from the first inclined portion 81a. 81 b and are formed, and the second inclined portion 81 b is connected to the recessed portion 85 .
In the first embodiment, the entire transverse cutting guide line 81 is curved in an arcuate shape protruding upward. A vertex of the arc is a connecting portion between the first inclined portion 81a and the second inclined portion 81b.

On the inner surface of the lateral flap 51, an end linearly extending from above the connecting portion between the first inclined portion 81a and the second inclined portion 81b toward the upper end of the corner portion between the side wall 20 and the lateral flap 51 is formed. A section ruled line 82 is formed.

The right lateral flap 51 of the front end wall 50 is also formed with a transverse cutting guide line 81 and a depression 85 . The transverse cutting guide lines 81 and the recesses 85 of the left and right transverse flaps 51, 51 are formed symmetrically.
Further, the left and right lateral flaps 51, 51 of the rear end wall 50 are also formed with transverse cutting guide lines 81 and depressions 85 (see FIG. 2). The transverse cutting guide lines 81 and recessed portions 85 of the front and rear transverse flaps 51, 51 are formed symmetrically in the front-rear direction.

Next, a procedure for opening the packaging box 1A of the first embodiment from the left and right side walls 20, 20 will be described.
First, the operator pushes the cover plate 72 in the side opening start portion 71 of the side wall 20 shown in FIG.

Subsequently, as shown in FIG. 3, the operator puts a fingertip on the opening edge of the side unsealing starter 71 and pulls out the upper portion of the side wall 20 in the lateral direction (outside). At this time, the upper portion of the side wall 20 is bent outward along the left and right side ruled lines 77, 77, so that the upper portion of the side wall 20 is largely drawn out. As a result, the side cutting guide line 75 is laterally cut open.

Further, when the upper portion of the side wall 20 is pulled out, the angle between the upper portion of the side wall 20 and the upper portion of the lateral flap 51 increases. That is, the corner between the upper portion of the side wall 20 and the upper portion of the lateral flap 51 is opened. Then, the portion of the lateral flap 51 above the first inclined portion 81a is drawn inward from its original position with the end ruled line 82 as a folding line. As a result, following the front portion 75b and the rear portion 75c of the side cut guide wire 75, the first inclined portion 81a of the transverse cut guide wire 81 is cut open.

After cutting open the first inclined portion 81a of the transverse cutting guide line 81, as shown in FIG. 4, the upper portion of the side wall 20 is lifted and the second inclined portion 81b is cut diagonally downward. At this time, since the second inclined portion 81b is connected to the recessed portion 85 and the length of the second inclined portion 81b is short, the second inclined portion 81b can be easily cut open.

By cutting open the side cutting guide lines 75, 75 of the left and right side walls 20 and the cross cutting guide lines 81 of the lateral flaps 51, the side walls 20, 20 and the lateral flaps 51 are divided into upper and lower parts to form the packaging box 1A. Cut off the top from the bottom.
In this way, when the packaging box 1A is opened, the lower part of the packaging box 1A becomes a tray, so that the contents can be displayed in the tray.

Next, a procedure for opening the packaging box 1A of the first embodiment from the top plate 30 will be described.
First, an operator pushes the cover plate 62 in the top unsealing start portion 61 of the top plate 30 shown in FIG.

Subsequently, as shown in FIG. 5, the operator puts his or her fingertips on the edge of the opening of the top unsealing starter 61 and pulls up the left and right halves of the top plate 30 .
At this time, the top plate 30 is bent upward along the first top ruled line 67a and the second top ruled line 67b, so that the top plate 30 can be largely drawn out.
As a result, the top cutting guide line 65 is cut forward and backward from the top unsealing start portion 61 .

When the top cutting guide line 65 is cut open to the front and rear ends, the top cutting guide line 65 is followed by front and rear vertical cutting guide lines 66 , 66 which are cut open downward. As a result, the top plate 30 and the front and rear upper flaps 52, 52 are divided into left and right.

When the right half of the top plate 30 is pulled up, the lateral cutting guide line 81 is cut open from the recess 85 of the lateral flap 51, as shown in FIG.
When the transverse cutting guide line 81 is cut open to the proximal edge of the transverse flap 51 , the lateral cut guiding line 75 of the side wall 20 is cut open continuously with the transverse cutting guide line 81 .
In this way, the left and right side walls 20, 20 and each lateral flap 51 are divided into upper and lower parts, and the upper part of the packaging box 1A is cut off from the lower part.

In the packaging box 1A of the first embodiment as described above, as shown in FIG. 3, when the left and right side walls 20, 20 are unsealed, it is easy to apply lateral force to the side walls 20. As shown in FIG. Also, the upper portion of the side wall 20 is bent outward using the ruled lines 77, 77 on both sides as folding lines. Therefore, in the packaging box 1A of the first embodiment, the upper portion of the side wall 20 can be largely pulled out with a small force, so that the side cutting guide line 75 can be easily cut open.

Further, in the packaging box 1A of the first embodiment, following the front part 75b and the rear part 75c of the side cutting guide wire 75, the first inclined parts 81a, 81a of the front and rear transverse cutting guide wires 81, 81 are smoothly cut open. be able to.
In addition, in the packaging box 1A of the first embodiment, since the upper portion of the first inclined portion 81a of the horizontal flap 51 is drawn inward along the edge ruled line 82, the first inclined portion 81a can be easily cut open. can.

Furthermore, after the first inclined portion 81a of the transverse cutting guide line 81 is cut open, the upper portion of the side wall 20 is lifted as shown in FIG. 4, whereby the second inclined portion 81b can be smoothly cut diagonally downward.
In this manner, in the packaging box 1A of the present embodiment, the side cutting guide line 75 and the transverse cutting guide line 81 can be easily cut open to cut off the upper portion from the lower portion of the packaging box 1A.

In the packaging box 1A of the first embodiment, as shown in FIG. 5, when the package is opened from the top plate 30, it is easy to apply an upward force to the top plate 30. As shown in FIG. Further, the top plate 30 is bent upward with the first top ruled line 67a and the second top ruled line 67b as folding lines. Therefore, in the packaging box 1A of the first embodiment, the top plate 30 can be largely drawn upward with a small force, so that the top cutting guide line 65 can be easily cut open.
Then, following the top cutting guide line 65, the front and rear longitudinal cut guide lines 66, 66, the front and rear transverse cut guide lines 81, 81, and the left and right side cut guide lines 75, 75 are sequentially cut open to cut open the packaging box. The top of 1A can be cut off from the bottom.

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 gist thereof.
For example, in the packaging box 1A of the first embodiment, as shown in FIG. The two inclined portions 81b may be formed linearly.

In the packaging box 1A of the first embodiment, the top plate 30 is provided with the top cutting guide line 65 and the upper flap 52 is provided with the vertical cutting guide line 66, so that it can be opened from the top plate 30. However, this As a reference example of the invention, the top cutting guide line 65 and the vertical cutting guide line 66 may not be provided. In other words, it may be configured such that it can be opened only from the left and right side walls 20 , 20 .

In the packaging box 1A of the first embodiment, the positions of the side unsealing start portion 71 and the top unsealing start portion 61 are not limited, and the positions are set according to the storage state of the contents. Moreover, although the side opening start portion 71 and the top opening start portion 61 of the first embodiment are openings, the shape thereof is not limited. A unit 61 may be configured.

In the packaging box 1A of the first embodiment, the left and right lateral flaps 51, 51 are arranged with an interval in the left-right direction, but the left and right lateral flaps 51, 51 may be butted against each other. Moreover, in the packaging box 1A of the first embodiment, the upper flap 52 and the lower flap 53 are arranged with a space therebetween in the vertical direction, but the upper flap 52 and the lower flap 53 may be butted against each other.

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

[Second embodiment]
Next, the packaging box 1B of 2nd embodiment is demonstrated.
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 is provided with left and right inclined walls 90, 90. The difference is that

As shown in FIG. 7, the packaging box 1B of the second embodiment is formed by mountain-folding or valley-folding a blank sheet S2 obtained by cutting out one cardboard sheet along each ruled line. The blank sheet S2 shown in FIG. 7 is arranged so that the outer surface side can be seen.

In the packaging box 1B of the second embodiment, the lower edge of the left inclined wall 90 is connected to the upper edge of the left side wall 20 via a ruled line. The left inclined wall 90 is a belt-like portion formed along the upper edge of the side wall 20 . The left slanted wall 90 is slanted so that the upper edge is positioned inwardly relative to the lower edge.
The joint piece 40 is connected to the upper edge of the left inclined wall 90 via a ruled line. Thus, the upper edge of the left side wall 20 and the left edge of the top plate 30 are connected via the left inclined wall 90 .

Further, in the packaging box 1B of the second embodiment, the lower edge of the right inclined wall 90 is connected to the upper edge of the right side wall 20 . The left and right inclined walls 90, 90 have a symmetrical configuration. The right edge of the top plate 30 is connected to the upper edge of the right inclined wall 90 via a ruled line.

On the outer surface of the inclined wall 90, there are a front inclined ruled line 91 extending obliquely upward rearward from the lower corner of the front part, and a rear inclined part extending obliquely upward forward from the lower corner of the rear part. A side slope ruled line 92 is formed.

In the packaging box 1B of the second embodiment as described above, as shown in FIG. It is bent outward along the front-side inclined-portion ruled line 91 and the rear-side inclined-portion ruled line 92 as fold lines. As a result, the upper portion of the side wall 20 can be largely drawn outward with a small force. Therefore, in the packaging box 1B of the second embodiment, even if the inclined wall 90 is provided between the side wall 20 and the top plate 30, the side cutting guide line 75 can be easily cut open.

Although the second embodiment of the present invention has been described above, the present invention is not limited to the second embodiment, and can be modified as appropriate without departing from the spirit of the first embodiment. is.

1A packaging box (first embodiment)
1B packaging box (second embodiment)
10 Bottom plate 20 Side wall 30 Top plate 40 Joining piece 50 End wall 51 Horizontal flap 52 Top flap 53 Bottom flap 61 Top unsealing start part 62 Lid plate 65 Top cut guide line 66 Vertical cut guide line 67a First top ruled line 67b Second top ruled line 71 Side unsealing start part 72 Lid plate 75 Side cutting guide line 75a Parallel part 75b Front part 75c Rear part 77 Side ruled line 81 Transversal cut guide line 81a First inclined part 81b Second inclined part 82 End ruled line 85 Hollow part 90 Inclined Wall 91 Front inclined ruled line 92 Rear inclined ruled line S1 Blank sheet (first embodiment)
S2 blank sheet (second embodiment)

Claims (4)

a bottom plate;
a pair of left and right side walls connected to left and right edges of the bottom plate;
a top plate connected to the upper edges of the both side walls;
a pair of front and rear end walls,
The end wall is formed by overlapping left and right lateral flaps connected to the both side walls with an upper flap connected to the top plate and a lower flap connected to the bottom plate,
The side wall is formed with a side opening starting portion and a side cutting guide line extending from the side opening starting portion to the front and rear edges,
The front and rear portions of the side cutting guide line extend obliquely upward from the side opening start portion,
A transverse cutting guide line is formed from the proximal edge to the distal edge of the lateral flap,
In the transverse cutting guide line,
a first inclined portion extending obliquely upward continuously from the side cutting guide line;
a second inclined portion extending obliquely downward continuously from the first inclined portion ;
A top opening start portion is formed in the central portion of the top plate,
A top cutting guide line is formed on the top plate from the top unsealing start portion to the front and back edges,
A vertical cutting guide line is formed on the upper flap from the base edge to the tip edge continuously from the top cutting guide line,
The top cutting guide line is
Extending toward one of the left and right sides of the front edge of the top plate,
extends toward the other left and right sides of the rear edge of the top plate,
On the inner surface of the top plate,
a first top ruled line extending from the center of the top plate toward the other left and right sides of the front edge;
and a second top ruled line extending from the central portion of the top plate toward one of the left and right sides of the rear edge portion is formed . a bottom plate;
a pair of left and right side walls connected to left and right edges of the bottom plate;
a top plate connected to the upper edges of the both side walls;
a pair of front and rear end walls,
The end wall is formed by overlapping left and right lateral flaps connected to the both side walls with an upper flap connected to the top plate and a lower flap connected to the bottom plate,
The side wall is formed with a side opening starting portion and a side cutting guide line extending from the side opening starting portion to the front and rear edges,
The front and rear portions of the side cutting guide line extend obliquely upward from the side opening start portion,
A transverse cutting guide line is formed from the proximal edge to the distal edge of the lateral flap,
In the transverse cutting guide line,
a first inclined portion extending obliquely upward continuously from the side cutting guide line;
a second inclined portion extending obliquely downward continuously from the first inclined portion ;
The upper edge of the side wall and the edge of the top plate are connected via an inclined wall,
On the outer surface of said inclined wall,
a front inclined ruled line extending obliquely upward rearward from the lower corner of the front;
and a rear inclined ruled line extending obliquely upward from a lower corner of the rear portion toward the front . The packaging box according to claim 1 or claim 2 ,
Formed on the inner surface of the side wall is a pair of front and rear side ruled lines extending from the side unsealing start portion toward the upper edge of the side wall,
A packaging box, wherein the spacing between the ruled lines on both sides in the left-right direction widens upward. The packaging box according to any one of claims 1 to 3 ,
On the inner surface of the horizontal flap, there is an end ruled line extending from above the connecting portion between the first inclined portion and the second inclined portion toward the upper end portion of the corner between the side wall and the horizontal flap. A packaging box characterized by being formed.

Images