JP7563271B2 - Packaging box - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies. The packaging box related to the invention was sold to Keibunsha Co., Ltd. on September 2, 2020.

The present invention relates to a packaging box.

When cardboard packaging boxes are stacked, the load from above can cause the walls to bulge outward, resulting in the walls and corners of the body eventually buckling.
In view of this, there is a conventional A-type packaging box in which two inclined lines starting from the lower end of the fold line at the corner of the body are arranged in a V shape on either side of the fold line (see, for example, Patent Document 1). With this packaging box, when a load is applied from above, the walls are regularly deformed at the inclined lines, preventing buckling of the walls and corners, and maintaining a good appearance even when the body is deformed.

Patent No. 6733719

A wraparound type packaging box has a rectangular cylindrical body having a top plate, a bottom plate, and left and right side walls, left and right side flaps connected to both side walls, an upper flap connected to the top plate, and a lower flap connected to the bottom plate. In a wraparound type packaging box, the upper and lower flaps are overlapped with the left and right side flaps to provide end walls at the front and rear openings of the body.

When the inclined lines of the A-type packaging box described above are applied to a wrap-around type packaging box, inclined lines are formed on the adjacent side walls and horizontal flaps. In this case, when a load is applied from above to the body, the upper and lower flaps overlapping the horizontal flaps prevent the horizontal flaps from deforming, which creates the problem that the end walls at the opening of the body are unlikely to deform regularly.

The present invention aims to solve the above problems and provide a packaging box that can suppress body bulging and prevent buckling of walls and corners when a load is applied from above in a wraparound type box body.

In order to solve the above problem, the present invention provides a packaging box having a rectangular tubular body having a top plate, a bottom plate, and left and right side walls. The packaging box also includes left and right side flaps connected to the both side walls via fold lines, an upper flap connected to the top plate and overlapping the both side flaps, and a lower flap connected to the bottom plate and overlapping the both side flaps. The side walls and the side flaps are formed with a first inclined crease extending toward a lower end of the crease line, and the first inclined crease is inclined with respect to the crease line so as to move away from the crease line as it moves upward from the lower end. The lower flap is formed with a second inclined crease extending toward a lower end of the crease line. The second inclined crease is inclined with respect to the crease line so as to move away from the crease line as it moves upward from the lower end. The lower part of the first inclined crease of the side flap is covered by the lower flap, and the second inclined crease of the lower flap is formed along the first inclined crease.

In the packaging box of the present invention, two first inclined creases starting from the lower end of the fold line between the side wall and the horizontal flap are arranged in a V-shape on either side of the fold line. Furthermore, in the packaging box of the present invention, a second inclined crease extending in the same direction as the first inclined crease of the horizontal flap is also formed on the bottom flap.
In this configuration, when a load is applied to the packaging box from above, the side walls and the horizontal flaps deform regularly at both first inclined lines, and the bottom flap deforms regularly at the second inclined lines, allowing the horizontal flaps to deform regularly at the first inclined lines without being hindered by the bottom flap.
Therefore, in the packaging box of the present invention, when a load is applied from above, the walls are regularly deformed, suppressing bulging and preventing buckling of the walls and corners. As a result, the packaging box of the present invention can maintain a good appearance even when the walls are deformed by a load from above.

In the above-mentioned packaging box, it is preferable that an upper crease extending toward an upper end of the first inclined crease is formed on at least one of the side wall and the upper flap, and the upper crease is inclined with respect to the fold line so as to approach the fold line as it moves upward from the lower end.
In this configuration, the load from above is input to the first inclined scoring line along the upper scoring line, and the load from above acts reliably toward the lower end of the corner, thereby effectively suppressing trunk bulge.

In the above-mentioned packaging box, it is preferable that a branch line extending toward an upper end of the first inclined line is formed on the side wall, and the branch line is inclined with respect to the upper edge of the side wall so as to approach the upper edge of the side wall as it moves upward from the lower end.
In this configuration, the load from above is input to the first inclined score line along the branch score line, and the load from above acts reliably toward the lower end of the corner, thereby effectively suppressing trunk bulge.

In the above-mentioned packaging box, it is preferable that a horizontal line extending along an upper edge of the side wall is formed on the upper portion of the side wall.
In this configuration, when a load acts on the packaging box from above and the side wall is deformed at the horizontal line, an inclined surface is formed between the upper edge of the side wall and the horizontal line, so that the appearance of the packaging box can be improved even when a load acts on the packaging box from above and the side wall is deformed.

In the present invention, when a load acts from above on a wrap-around type packaging box, the walls on both sides of the corners deform regularly, suppressing body bulging and preventing buckling of the walls and corners. Therefore, in the present invention, the appearance of a wrap-around type packaging box can be improved even when the walls are deformed by a load from above.

1 is a perspective view of a packaging box according to a first embodiment of the present invention, viewed from the upper left front side. FIG. FIG. 2 is a perspective view of the packaging box according to the first embodiment of the present invention, seen from the upper right rear side. 1 is a diagram showing a blank sheet for a packaging box according to a first embodiment of the present invention; 1 is a perspective view showing a state before an upper flap and a lower flap are closed in a packaging box according to a first embodiment of the present invention. FIG. FIG. 2 is a left side view showing the packaging box according to the first embodiment of the present invention. 1 is a front view showing a packaging box according to a first embodiment of the present invention. FIG. FIG. 4 is a left side view showing a packaging box according to a second embodiment of the present invention. FIG. 11 is a diagram showing a blank sheet for a packaging box according to a second embodiment of the present invention.

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 description of each embodiment, the same components are denoted by the same reference numerals, and duplicate descriptions will be omitted.
In the following description, the front, rear, left and right directions are set for the convenience of describing the packaging box of the embodiment, and do not limit the configuration of the packaging box of the present invention.

[First embodiment]
As shown in FIG. 1 , the packaging box 1A of the first embodiment is a wraparound cardboard box having a rectangular cylindrical body 10 having a top plate 20, a bottom plate 30 and left and right side walls 40, 40, and front and rear end walls 60, 60 provided at the front and rear openings of the body 10.

The packaging box 1A of the first embodiment is formed by mountain-folding or valley-folding a blank sheet S1 cut out from a cardboard sheet at each fold line, as shown in Fig. 3. The blank sheet S1 shown in Fig. 3 is arranged so that the inner side is visible.
The fold lines of the blank sheet S1 are lines (pressed creases) formed by linearly pressing the surface of the blank sheet S1. Note that the creases may be formed with intermittent cuts. In this way, it becomes easier to fold the blank sheet S1 at the fold lines.
Alternatively, the folded line may be formed by forming a half-cut slit only on the surface of the sheet or by forming an intermittent slit penetrating the sheet.

As shown in FIG. 1, the bottom plate 30 is a rectangular flat plate. A left side wall 40 is connected to the left edge of the bottom plate 30 via a fold line, and a right side wall 40 is connected to the right edge of the bottom plate 30. The left and right side walls 40, 40 are the same rectangular wall body and are formed perpendicular to the bottom plate 30.

The top plate 20 is connected to the upper edge of the left side wall 40 via a folding line. The top plate 20 is a rectangular flat plate like the bottom plate 30, and is formed perpendicular to the left side wall 40.
A joint piece 50 is connected via a folding line to the upper edge of the right side wall 40. The joint piece 50 extends in a strip shape along the upper edge of the right side wall 40.

The blank sheet S1 (see Figure 3) is folded at each fold line, and the joining piece 50 connected to the upper edge of the right side wall 40 is joined to the inner surface of the top plate 20, so that the right side wall 40, bottom plate 30, left side wall 40 and top plate 20 are formed into a rectangular tube shape.

The front end wall 60 has left and right lateral flaps 61, 61 connected to the left and right side walls 40, 40, respectively, an upper flap 62 connected to the top plate 20, and a lower flap 63 connected to the bottom plate 30.

4, the side flap 61 is a rectangular flat plate connected to the front edge of the side wall 40 via a folding line L1, and is formed perpendicular to the side wall 40. The left and right side flaps 61, 61 are formed symmetrically.
In the first embodiment, the left and right lateral flaps 61, 61 are butted against each other, but the left and right lateral flaps 61, 61 may be arranged with a gap between them in the left-right direction.

As shown in FIG. 1, the upper flap 62 is a rectangular flat plate connected to the front edge of the top plate 20 via a fold line, and is formed perpendicular to the top plate 20. The upper flap 62 is layered on the upper part of the outer surfaces of the left and right side flaps 61, 61.

The upper flap 62 and the lower flap 63 are formed symmetrically from top to bottom. The lower flap 63 is connected to the front edge of the bottom plate 30 via a fold line, and is overlapped on the lower part of the outer surface of the left and right side flaps 61, 61.

The upper flap 62 and the lower flap 63 are attached to the left and right side flaps 61, 61 with an adhesive.
In the first embodiment, the upper flap 62 and the lower flap 63 are arranged with a gap between them in the up-down direction, but the upper flap 62 and the lower flap 63 may be butted against each other.

The front end wall 60 and the rear end wall 60 are formed symmetrically from front to rear. As shown in FIG. 2, in the rear end wall 60, an upper flap 62 connected to the rear edge of the top plate 20 and a lower flap 63 connected to the rear edge of the bottom plate 30 are attached to the outer surfaces of left and right lateral flaps 61, 61 connected to the rear edges of the left and right side walls 40, 40 via fold lines L1.

As shown in FIG. 5, the left side wall 40 has two first inclined lines L10, L10 at the front and rear, two first upper lines L30, L30 at the front and rear, and a horizontal line L40. The first inclined line L10, the first upper line L30, and the horizontal line L40 are lines (pressed lines) formed by linearly pressing the inner surface of the side wall 40.

The first inclined line L10 is a straight line extending in the vertical direction. The front first inclined line L10 is formed in the front part of the side wall 40, and the rear first inclined line L10 is formed in the rear part of the side wall 40.

The first front inclined line L10 is inclined relative to the front fold line L1 (front edge) of the side wall 40 as it moves upward from the lower end. In other words, the first front inclined line L10 is inclined relative to the lower edge of the side wall 40 so that the upper end is positioned further rearward than the lower end. The first front inclined line L10 extends toward the lower end of the front fold line L1.

The front and rear first inclined lines L10, L10 are formed symmetrically from front to rear. The rear first inclined line L10 moves away from the rear fold line L1 (rear edge) of the side wall 40 as it moves upward from the lower end.

The first inclined line L10 of the side wall 40 is formed at an inclination angle between 60 degrees and 80 degrees with respect to the lower edge of the side wall 40. It is preferable that the inclination angle of the first inclined line L10 with respect to the lower edge of the side wall 40 is 70 degrees.

The upper end of the first inclined line L10 is spaced apart from the upper edge of the side wall 40, and the lower end of the first inclined line L10 is spaced apart from the lower edge of the side wall 40. In addition, the upper ends of the front and rear first inclined lines L10, L10 are spaced apart in the front-to-rear direction.

The first upper crease L30 is a straight line extending in the left-right direction. The front first upper crease L30 is formed in the front upper part of the side wall 40, and the rear first upper crease L30 is formed in the rear upper part of the side wall 40.

The front first upper crease L30 is inclined with respect to the upper edge of the side wall 40 so that the front end is positioned higher than the rear end. The front first upper crease L30 is inclined with respect to the front fold line L1 so as to approach the front fold line L1 (front edge) of the side wall 40 as it moves upward from the lower end.
The front first upper crease L30 extends toward the upper end of the front first inclined crease L10. In the first embodiment, the lower end of the front first upper crease L30 is connected to the upper end of the front first inclined crease L10. The upper end of the first upper crease L30 is spaced apart from the upper edge of the side wall 40.

The front and rear first upper creases L30, L30 are formed symmetrically. The rear first upper crease L30 approaches the rear fold line L1 (rear edge) of the side wall 40 as it moves upward from the lower end.

The horizontal line L40 is formed in the center in the left-right direction at the top of the side wall 40. The horizontal line L40 is a straight line that extends from the upper end of the first inclined line L10 on the front side to the upper end of the first inclined line L10 on the rear side. The horizontal line L40 is also parallel to the upper edge of the side wall 40.

As shown in FIG. 2, the right side wall 40, like the left side wall 40, is formed with two first inclined lines L10, L10 at the front and rear, two first upper lines L30, L30 at the front and rear, and a horizontal line L40.

As shown in FIG. 6, the front end wall 60 is formed with two first inclined lines L11, L11, two second inclined lines L12, L12, and two second upper lines L31, L31. The first inclined lines L11, the second inclined lines L12, and the second upper lines L31 are lines (pressed lines) formed by linearly pressing the inner surface of the end wall 60.

As shown in FIG. 4, the first inclined line L11 is a straight line extending in the vertical direction. The left first inclined line L11 is formed on the left side horizontal flap 61, and the right first inclined line L11 is formed on the right side horizontal flap 61.

The first left inclined line L11 is inclined relative to the left fold line L1 (left edge) of the left horizontal flap 61 as it moves upward from the bottom end. In other words, the first left inclined line L10 is inclined relative to the bottom edge of the end wall 60 so that its upper end is positioned further right than its lower end. The first left inclined line L10 extends toward the bottom end of the left fold line L1.

The left and right first inclined lines L11, L11 are formed symmetrically. The right first inclined line L10 moves away from the right fold line L1 (right edge) of the right horizontal flap 61 as it moves upward from the bottom end.

The first inclined line L11 is formed at an inclination angle between 60 degrees and 80 degrees with respect to the lower edge of the end wall 60. It is preferable that the inclination angle of the first inclined line L11 with respect to the lower edge of the end wall 60 is 70 degrees.

The upper end of the first inclined ruled line L11 is separated from the upper edge of the upper flap 62. In the first embodiment, as shown in Fig. 6, the upper end of the first inclined ruled line L10 is disposed between the lower edge of the upper flap 62 and the upper edge of the lower flap 63. In addition, the upper ends of the left and right first inclined ruled lines L11, L11 are disposed with a gap in between in the left-right direction.
A lower portion of the first inclined crease L11 is covered by a lower flap 63 (see FIG. 4). A lower end portion of the first inclined crease L11 is spaced apart from the lower edge portion of the end wall 60.

The left and right second inclined lines L12, L12 are formed on the lower flap 63. The second inclined lines L12 are straight lines that extend in the vertical direction.

The second left inclined line L12 is inclined relative to the left fold line L1 (left edge) of the end wall 60 as it moves upward from the bottom end. In other words, the second left inclined line L12 is inclined relative to the bottom edge of the end wall 60 so that its upper end is positioned further right than its lower end. The second left inclined line L12 extends toward the bottom end of the left fold line L1.

The left and right second inclined lines L12, L12 are formed symmetrically. The right second inclined line L12 moves away from the right fold line L1 (right edge) of the end wall 60 as it moves upward from the lower end.

The second inclined line L12 is formed at an inclination angle between 60 degrees and 80 degrees with respect to the lower edge of the end wall 60. It is preferable that the inclination angle of the second inclined line L12 with respect to the lower edge of the end wall 60 is 70 degrees.

The upper end of the second inclined line L12 is spaced apart from the upper edge of the lower flap 63, and the lower end of the second inclined line L12 is spaced apart from the lower edge of the end wall 60. In addition, the upper ends of the left and right second inclined lines L12, L12 are spaced apart in the left-right direction.

The second inclined line L12 is formed along the first inclined line L11, outside the lower part of the first inclined line L11. It is preferable that the second inclined line L12 overlaps the lower part of the first inclined line L11 when viewed from the front of the packaging box 1, or is positioned slightly offset in the left-right direction from the lower part of the first inclined line L11.

The left and right second upper lines L31, L31 are formed on the upper flap 62. The second upper lines L31 are straight lines extending in the left-right direction.

The second upper crease L31 on the left side is inclined with respect to the upper edge of the end wall 60 so that the left end is positioned higher than the right end. The second upper crease L31 on the left side is inclined with respect to the left fold line L1 so as to approach the left fold line L1 (left edge) of the end wall 60 as it moves upward from the lower end.
The second upper crease L31 on the left side extends toward the upper end of the first inclined crease L11 on the left side. The lower end of the second upper crease L31 is spaced apart from the upper end of the first inclined crease L11. In addition, the upper end of the second upper crease L31 is spaced apart from the upper edge of the end wall 60.

The left and right second upper creases L31, L31 are formed symmetrically. The right second upper crease L31 approaches the right fold line L1 (right edge) of the end wall 60 as it moves upward from the lower end.

In the first embodiment, the left and right second upper lines L31, L31 formed on the upper flap 62 and the left and right second inclined lines L12, L12 formed on the lower flap 63 are formed symmetrically from top to bottom.

As shown in FIG. 2, the rear end wall 60 is also formed with two first inclined lines L11, L11 on the left and right, two second inclined lines L12, L12 on the left and right, and two second upper lines L31, L31 on the left and right, just like the front end wall 60.

In the first embodiment of the packaging box 1A, as shown in Figures 1 and 2, two first inclined lines L10, L11 starting from the lower end of the fold line L1 at the corner between the side wall 40 and the horizontal flap 61 are arranged in a V shape, sandwiching the fold line L1.
In the packaging box 1A of the first embodiment, two first inclined lines L10, L11 are formed at each of the front right, rear right, front left, and rear left corners.
In addition, in the packaging box 1A of the first embodiment, the lower flap 63 of the end wall 60 is formed with a second inclined line L12 that extends in the same direction as the first inclined line L11 of the horizontal flap 61.

In the packaging box 1A described above, when a load acts from above on the body 10, the side walls 40 and the horizontal flaps 61 deform regularly at both first inclined lines L10, L11, and the lower flap 63 deforms regularly at the second inclined lines L12.
This allows the left and right lateral flaps 61, 61 to deform regularly at the first inclined ruled line L11 without being hindered by the lower flap 63.

Therefore, when a load acts from above on the wrap-around packaging box 1A, the walls deform regularly, suppressing bulging and preventing buckling of the walls and corners. This allows the wrap-around packaging box 1A to maintain a good appearance even when the walls are deformed by a load from above.

In addition, in the packaging box 1A of the first embodiment, a load from above acts toward the lower end of the corner along the first inclined lines L10 and L11. Furthermore, in the packaging box 1A of the first embodiment, the load from above is concentrated on the first inclined line L10 along the first upper line L30, and is also concentrated on the first inclined line L11 along the second upper line L31.
Therefore, in the packaging box 1A of the first embodiment, the load from above is reliably applied toward the lower end of the corner, so that bulging can be effectively suppressed.

In the packaging box 1A of the first embodiment, when a load is applied from above and the side wall 40 is deformed at the horizontal line L40 of the side wall 40, an inclined surface is formed between the upper edge of the side wall 40 and the horizontal line L40. Therefore, the packaging box 1A of the first embodiment can maintain a good appearance even when a load is applied from above and the side wall 40 is deformed.

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 present invention.
In the first embodiment of the packaging box 1A, as shown in Figures 1 and 2, the entire first inclined lines L10, L11 are formed in a straight line, but it is sufficient that at least the lower portions of the first inclined lines L10, L11 are formed in a straight line, and the upper portions of the first inclined lines L10, L11 may be curved or bent.

In the packaging box 1A of the first embodiment, two first upper creases L30 are formed on the side wall 40 and two second upper creases L31 are formed on the end wall 60, but the number of the first upper creases L30 and the second upper creases L31 is not limited. For example, the first upper creases L30 do not have to be formed on the side wall 40. Also, the second upper creases L31 do not have to be formed on the end wall 60.
Furthermore, the shapes of the first upper crease L30 and the second upper crease L31 are not limited, and the entire first upper crease L30 and the entire second upper crease L31 may be curved.

In the first embodiment of the packaging box 1A, the first inclined line L11 of the end wall 60 and the first inclined line L10 of the side wall 40 are inclined at the same angle with respect to the fold line L1, but the first inclined line L11 of the end wall 60 and the first inclined line L10 of the side wall 40 may be inclined at different angles with respect to the fold line L1.

In the packaging box 1A of the first embodiment, horizontal lines L40 are formed on the side walls 40, but horizontal lines may also be formed on the end walls 60. In addition, the shape of the horizontal lines L40 is not limited, and the horizontal lines L40 may be curved or bent.

The packaging box 1A in the first embodiment is made of corrugated cardboard, but the packaging box may also be made of any known paperboard.

[Second embodiment]
Next, a packaging box 1B according to a second embodiment will be described. As shown in Fig. 7 and Fig. 8, the packaging box 1B according to the second embodiment has a substantially similar configuration to the packaging box 1A according to the first embodiment (see Fig. 1), but the configuration of the lines formed on the side wall 40 is different.

The packaging box 1B of the second embodiment is formed by mountain or valley folding the blank sheet S2 shown in FIG. 8 at each fold line. The blank sheet S2 shown in FIG. 8 is positioned so that the inner side is visible.

In the second embodiment, the horizontal line L40 is disposed between the upper end of the first inclined line L10 on the front side and the upper end of the first inclined line L10 on the rear side. Both ends of the horizontal line L40 in the second embodiment are spaced apart from the first inclined line L10, L10 on the front and rear sides.

In the side wall 40 of the second embodiment, front and rear vertical lines L50, L50 extend downward from the front and rear ends of the horizontal line L20. The left and right vertical lines L50, L50 are straight lines extending in the up-down direction.
The front vertical line L50 is inclined with respect to the front fold line L1 so as to move away from the front fold line L1 as it extends downward from the upper end portion.
The rear vertical line L50 is inclined with respect to the rear fold line L1 so as to move away from the rear fold line L1 as it extends downward from the upper end portion.
The distance between the front and rear vertical lines L50, L50 in the front-rear direction narrows from the top end to the bottom end.
The lower ends of both vertical lines L50, L50 are spaced apart from the lower edge of the side wall 40.

In the second embodiment, the side wall 40 is formed with a front branch line L60 that extends toward the upper end of the front first inclined line L10, and a rear branch line L60 that extends toward the upper end of the rear first inclined line L10.

The front branch line L60 is inclined relative to the upper edge of the side wall 40 so that its rear end is positioned higher than its front end. The front branch line L60 is inclined relative to the upper edge of the side wall 40 so that it approaches the upper edge of the side wall 40 as it moves upward from its lower end. The lower end of the front branch line L60 is connected to the upper end of the first front inclined line L10. In addition, the upper end of the front branch line L60 is separated from the upper edge of the side wall 40.

The front and rear branch lines L60, L60 are formed symmetrically from front to rear. The rear branch line L60 is inclined with respect to the upper edge of the side wall 40 so that the front end is positioned higher than the rear end.

As shown in FIG. 8, the right side wall 40, like the left side wall 40, has front and rear first inclined lines L10, L10, horizontal lines L40, front and rear vertical lines L50, L50, and front and rear branch lines L60, L60.

In the second embodiment of the packaging box 1B, as shown in FIG. 7, the load from above is concentrated on the first inclined line L10 along the first upper line L30 and the branch line L60, so that the load from above can be reliably applied toward the lower end of the corner.

In addition, in the packaging box 1B of the second embodiment, a load acts from the horizontal line L40 to the front and rear vertical lines L50, L50, causing the side wall 40 to deform regularly at both vertical lines L50, L50, thereby preventing the side wall 40 from bulging.

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

1A Packaging box (first embodiment)
1B Packaging box (second embodiment)
10 Body 20 Top plate 30 Bottom plate 40 Side wall 50 Joint piece 60 End wall 61 Horizontal flap 62 Upper flap 63 Lower flap L1 Fold line L10 First inclined crease L11 First inclined crease L12 Second inclined crease L30 First upper crease L31 Second upper crease L40 Horizontal crease L50 Vertical crease L60 Branch crease S1 Blank sheet (first embodiment)
S2 Blank sheet (second embodiment)

Claims (4)

A square cylindrical body having a top plate, a bottom plate, and left and right side walls;
Left and right side flaps respectively connected to the side walls via fold lines;
An upper flap connected to the top plate and overlapping the side flaps;
A lower flap is provided on the bottom plate and overlaps the side flaps.
The side wall and the transverse flap are formed with a first inclined crease extending toward a lower end of the fold line,
The first inclined ruled line is inclined with respect to the fold line so as to move away from the fold line as it moves upward from the lower end portion,
A second inclined line extending toward a lower end of the fold line is formed on the lower flap,
The second inclined ruled line is inclined with respect to the fold line so as to move away from the fold line as it moves upward from the lower end portion,
A packaging box characterized in that a lower portion of the first inclined line of the side flap is covered by the bottom flap, and the second inclined line of the bottom flap is formed along the first inclined line . The packaging box according to claim 1,
At least one of the side wall and the upper flap is formed with an upper crease extending toward an upper end of the first inclined crease,
The packaging box is characterized in that the upper crease is inclined with respect to the fold line so as to approach the fold line from the lower end portion toward the upper portion. The packaging box according to claim 1 or 2,
A branch crease is formed on the side wall, the branch crease extending toward an upper end of the first inclined crease,
The packaging box is characterized in that the branch line is inclined with respect to an upper edge of the side wall so as to approach the upper edge of the side wall as it moves upward from the lower end. The packaging box according to any one of claims 1 to 3,
A packaging box, characterized in that a horizontal line is formed on the upper part of the side wall, extending along the upper edge of the side wall.

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