JP7609057B2 - Blank sheet, box material, and packaging box assembly method - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies. On November 12, 2021, the packaging box related to the invention was sold to the Ota City Agricultural Cooperative.

The present invention relates to a blank sheet, a box material, and a method for assembling a packaging box.

Among cardboard packaging boxes, there is one which comprises a hexagonal cylindrical body having front and rear end walls, left and right side walls, and two inclined walls formed between adjacent end walls and side walls, and a lid provided at an opening of the body, with both inclined walls being arranged at diagonal positions on the body.
When assembling the above-mentioned hexagonal packaging box, a box-making die is first fitted into the body of a folded box material to form the body into a rectangular tubular shape. Then, the forming die is pressed against the corners of the body from the outside to incline the inclined walls relative to the end walls and side walls, thereby forming the body into a hexagon (see, for example, Patent Document 1).

JP 2020-175557 A

The conventional hexagonal packaging boxes mentioned above are designed to be assembled using a box-making machine, so there is a problem in that it is difficult to assemble the body by hand.

SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above-mentioned problems and to provide a blank sheet, box material, and packaging box assembling method that allow easy manual formation of a body into a hexagonal cylindrical shape.

The packaging box used in the present invention comprises a hexagonal tubular body having front and rear end walls, left and right side walls, and two inclined walls formed between the adjacent end walls and the side walls, and a lid provided at the opening of the body. The two inclined walls are arranged at diagonal positions of the body. The lid comprises front and rear end flaps respectively connected to one of the upper and lower edges of the end walls, and left and right side flaps respectively connected to one of the upper and lower edges of the both side walls. The end flaps are superimposed on the outer surfaces of the both side flaps. The side flaps are formed with front and rear connecting holes. The tip of the end flap is formed with left and right insertion pieces and a protruding piece arranged between the two insertion pieces. The insertion pieces are inserted into the connecting holes, and the protruding pieces are superimposed on the outer surfaces of the both side flaps. The two connecting holes arranged left and right are arranged at the same position in the front and rear direction at the end of the center side of the side flaps in the front and rear direction.

In order to solve the above problems, a first invention is a blank sheet for forming the packaging box, in which the end wall, the side wall , and the inclined wall are arranged in a horizontal direction, and the side wall and the side flap are arranged in a vertical direction. In the side flap, of the two connecting holes arranged horizontally, the connecting hole on the opposite side to the inclined wall side is arranged closer to the horizontal center of the side flap than the connecting hole on the inclined wall side.

In order to solve the above problem, a second invention is a box material for forming the packaging box, in which the body has the end wall and the inclined wall arranged flatly. In the side flap, of the two connecting holes arranged horizontally, the connecting hole on the opposite side to the inclined wall side is arranged closer to the lateral center of the side flap than the connecting hole on the inclined wall side.

In order to solve the above problem, the third invention is a method for assembling the packaging box, in which, when the end wall and the inclined wall of the body are arranged flat, of the two connecting holes arranged side by side in the side flap, the connecting hole on the opposite side to the inclined wall side is arranged closer to the center in the lateral direction of the side flap than the connecting hole on the inclined wall side. First , with the end wall and the inclined wall arranged flat, the inclined wall and the side wall are folded at right angles, and the end wall and the side wall are folded at right angles to form the body into a rectangular tube. Next, the insertion piece of the end flap is inserted into the connecting hole of the side flap, and the insertion piece pushes the connecting hole toward the center in the front-rear direction of the side flap, thereby inclining the inclined wall relative to the end wall, and forming the body into a hexagonal tube.

In the present invention, when assembling a hexagonal packaging box, first the body is formed into a square tube shape, and then the insertion piece of the end flap is inserted into the connecting hole of the side flap, and the insertion piece pushes the connecting hole on the inclined wall side toward the center in the front-to-rear direction of the side flap. As a result, the side wall is pushed out together with the side flap, and the inclined wall is pulled by the side wall, so that the inclined wall is folded against the end wall, and the body is formed into a hexagonal tube shape. Therefore, in the present invention, the body can be easily formed into a hexagonal tube shape by hand.

In the blank sheet and box material described above, it is preferable to form a pressing portion that protrudes toward the opposite side of the horizontal center of the side flap at the edge of the connecting hole on the horizontal center side of the side flap. In this case, of the two connecting holes aligned horizontally in the side flap, the pressing portion of the connecting hole on the opposite side of the inclined wall side is positioned closer to the horizontal center of the side flap than the pressing portion of the connecting hole on the inclined wall side.

By doing this, when the packaging box is assembled, the pressing parts of the left and right connecting holes are positioned at the same or close positions in the front-to-rear direction, and the left and right pressing parts press the tips of the end flaps evenly, stabilizing the end flaps relative to the left and right side flaps.

According to the blank sheet, box material, and packaging box assembling method of the present invention, the box material is delivered to the customer in a folded state, and the customer can easily assemble the hexagonal packaging box by hand.

1 is a perspective view of a packaging box according to an embodiment of the present invention, viewed from the upper left front side. 1 is a perspective view of a packaging box according to an embodiment of the present invention in an upside-down state. FIG. FIG. 2 is a diagram showing a blank sheet according to the embodiment of the present invention. FIG. 2 is a bottom view showing the box material according to the embodiment of the present invention. 1 is a perspective view showing a state before the locking pieces of the end flaps are inserted into the connecting holes of the side flaps in the method for assembling the packaging box according to the embodiment of the present invention. FIG. 1 is a bottom view showing a state in which the locking pieces of the end flaps are inserted into the connecting holes of the side flaps in the method of assembling the packaging box according to the embodiment of the present invention. FIG. FIG. 2 is a bottom view showing the packaging box according to the embodiment of the present invention. FIG. 13 is a diagram showing a blank sheet according to another 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 following description, the front, back, left and right directions are set for the convenience of describing the packaging box of this embodiment, and do not limit the configuration or usage state of the packaging box, blank sheet, and box materials.

As shown in FIG. 1, the packaging box 1 of this embodiment has a hexagonal cylindrical body 10, an upper lid 20 provided at the upper opening of the body 10, and a lower lid 30 provided at the lower opening of the body 10.

The packaging box 1 of this embodiment is formed by mountain-folding or valley-folding a blank sheet S (see FIG. 3) cut out from a cardboard sheet at each fold line. The blank sheet S shown in FIG. 3 is arranged so that the inner side is visible.
The fold lines of the blank sheet S are creases (pressed creases) formed by linearly pressing the surface of the blank sheet S. Note that intermittent cuts may be formed in the creases. In this way, it becomes easier to fold the blank sheet S 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 a slit penetrating the sheet in an intermittent linear fashion.

As shown in FIG. 1, the body 10 has front and rear end walls 11, 11, left and right side walls 12, 12, and two inclined walls 15, 15 formed between adjacent end walls 11 and side walls 12. As shown in FIG. 7, both inclined walls 15, 15 are disposed at diagonal positions on the body 10. In this embodiment, both inclined walls 15, 15 are disposed at the left front and right rear of the body 10. Hexagonal openings are formed on the upper and lower surfaces of the body 10.

As shown in FIG. 1 , the end wall 11 and the side wall 12 are formed in a rectangular shape, and the side wall 12 is disposed perpendicular to the end wall 11 .
The inclined wall 15 is formed in a strip shape along the side edges of the end wall 11 and the side wall 12 , and is inclined relative to the end wall 11 and the side wall 12 .

The inclined wall 15 is connected to the end wall 11 and the side wall 12 via a folding line. A strip-shaped joint piece 13 is connected to the right edge of the right rear inclined wall 15. This joint piece 13 is bonded to the inner surface of the right side wall 12 with an adhesive.
The blank sheet S (see FIG. 3) is folded along each fold line and the joining piece 13 is joined to the inner surface of the right side wall 12, thereby forming the tubular body 10 that is hexagonal in plan view.

The upper cover portion 20 has front and rear first flaps 21, 21 connected to the upper edges of the front and rear end walls 11, 11 respectively, and left and right second flaps 22, 22 connected to the upper edges of the left and right side walls 12, 12 respectively.
The first flap 21 is formed in a strip shape along the upper edge of the end wall 11. The second flap 22 is formed in a strip shape along the upper edge of the side wall 12. A rectangular opening is formed in the center of the upper cover portion 20.

As shown in FIG. 2, the lower cover 30 has front and rear end flaps 31, 31 connected to the lower edges of the front and rear end walls 11, 11, respectively, and left and right side flaps 32, 32 connected to the lower edges of the left and right side walls 12, 12, respectively.

The left side flap 32 is connected to the lower edge of the left side wall 12 via a fold line, and the right side flap 32 is connected to the lower edge of the right side wall 12 via a fold line.
7, the left side flap 32 is disposed in the left half of the lower opening of the torso 10, and the right side flap 32 is disposed in the right half of the lower opening of the torso 10. The tip edges of the left and right side flaps 32, 32 are butted against each other in the center of the torso 10 in the left-right direction.

As shown in FIG. 4, the left side flap 32 has a first connecting hole 50A and a second connecting hole 50B formed side by side in the front-to-rear direction. The first connecting hole 50A and the second connecting hole 50B are spaced apart in the front-to-rear direction.

The first connection hole 50A of the left side flap 32 (front left first connection hole 50A) is formed in the front part of the left side flap 32 and extends from the left edge of the side flap 32 toward the right.
A retaining portion 51 is formed on the left side of the rear edge of the first connecting hole 50A on the front left (the edge toward the center in the fore-and-aft direction of the side flap 32) and protrudes forward (the side opposite the center in the fore-and-aft direction of the side flap 32).

A recess 52 is formed on the right side of the rear edge of the first front left connecting hole 50A, recessed toward the rear (toward the center of the side flap 32 in the front-to-rear direction). The recess 52 is formed in a triangular shape in a plan view so that its width in the left-to-right direction decreases toward the rear.

The left front first connecting hole 50A is covered with a cover plate 53 except for its left end. The right edge of the cover plate 53 is connected to the right edge of the left front first connecting hole 50A via a fold line, and the front and rear edges of the cover plate 53 are connected to the front and rear edges of the left front first connecting hole 50A via slits.

The second connecting hole 50B (rear left second connecting hole 50B) of the left side flap 32 is formed in the rear of the left side flap 32. The rear left second connecting hole 50B has a shape symmetrical in the front-to-rear direction with respect to the front-to-rear first connecting hole 50A, but the front-to-rear width of each part of the rear left second connecting hole 50B is formed larger than the front-to-rear width of each part of the front-to-rear first connecting hole 50A.
A retaining portion 51 that protrudes rearward is formed on the left part of the front edge of the left rear second connecting hole 50B. A recessed portion 52 that is recessed forward (toward the center in the front-rear direction of the side flap 32) is formed on the right part of the rear edge of the left rear second connecting hole 50B. The left rear second connecting hole 50B is closed by a cover plate 53 except for its left end portion.

The right side flap 32 also has a first connecting hole 50A and a second connecting hole 50B formed in the front and rear. The first connecting hole 50A and the second connecting hole 50B of the right side flap 32 are formed point-symmetrically with the first connecting hole 50A and the second connecting hole 50B of the left side flap 32. In other words, the right side flap 32 has the second connecting hole 50B located in the front and the first connecting hole 50A located in the rear.

As shown in Fig. 7, when the packaging box 1 is assembled, the bottom of the recess 52 of the first front left connection hole 50A (the end toward the center in the front-to-rear direction of the side flap 32) and the bottom of the recess 52 of the second front right connection hole 50B are located at the same position in the front-to-rear direction (dotted line L1 in Fig. 7). Also, the bottom of the recess 52 of the first rear left connection hole 50A (the end toward the center in the front-to-rear direction of the side flap 32) and the bottom of the recess 52 of the second rear right connection hole 50B are located at the same position in the front-to-rear direction (dotted line L2 in Fig. 7).

2, the front end flap 31 is connected to the lower edge of the front end wall 11 via a fold line. The front end flap 31 is overlapped on the outer surfaces (lower surfaces) of the front parts of the left and right side flaps 32, 32.
The end flap 31 also has a bevelled edge formed along the lower edge of the angled wall 15 (see FIG. 7).
A fold line L10 extending in the left-right direction is formed on the inner surface of the end flap 31. The fold line L10 is formed across the left and right edges of the end flap 31 and is parallel to the base edge of the end flap 31 (the lower edge of the end wall 11) (see FIG. 7).

As shown in FIG. 4, the end flap 31 has two insertion pieces 61, 61 on the left and right sides, and a protruding piece 62 disposed between the insertion pieces 61, 61 at its tip.
Two left and right engagement recesses 63, 63 are formed on the leading edge of the end flap 31. A protruding piece 62 is formed between the two engagement recesses 63. In addition, a left insertion piece 61 is formed to the left of the left engagement recess 63, and a right insertion piece 61 is formed to the right of the right engagement recess 63.

The leading edge of both insertion pieces 61, 61 and the leading edge of the protruding piece 62 are parallel to the lower edge of the end wall 11. The leading edge of both insertion pieces 61, 61 and the leading edge of the protruding piece 62 are aligned in a straight line in the left-right direction.

As shown in FIG. 7, the left insertion piece 61 of the front end flap 31 is inserted from the outside into the first connecting hole 50A of the left side flap 32. The cover plate 53 is pressed inward by the insertion piece 61. The insertion piece 61 is overlapped on the inner surface of the pressing portion 51. The insertion piece 61 is pressed down from the inside and outside by the cover plate 53 and the pressing portion 51.

The left engagement recess 63 of the front end flap 31 is hooked onto the bottom of the recess 52 of the first connection hole 50A of the left side flap 32. In this way, the tip of the end flap 31 is engaged with the first connection hole 50A.

The right-side insertion piece 61 of the front end flap 31 is inserted from the outside into the second connecting hole 50B at the right front of the right side flap 32. The right-side insertion piece 61, like the left-side insertion piece 61, is held down from the inside and outside by the cover plate 53 and the retaining portion 51. In addition, the tip of the end flap 31 is engaged with the second connecting hole 50B.

The protruding piece 62 of the front end flap 31 is overlapped with the front of the outer surface (lower surface) of both side flaps 32, 32, straddling the butt joints of the left and right side flaps 32, 32 (see Figure 2).

The rear end flap 31 is connected to the lower edge portion of the rear end wall 11. The rear end flap 31 is formed line-symmetrically with respect to the front end flap 31.
The left insertion piece 61 of the rear end flap 31 is inserted into the second connecting hole 50B of the left side flap 32. The right insertion piece 61 of the rear end flap 31 is inserted into the first connecting hole 50A of the right side flap 32.
The protruding piece 62 of the rear end flap 31 is overlapped with the rear portions of the outer surfaces (lower surfaces) of the side flaps 32, 32 (see FIG. 2).

As shown in FIG. 3, the blank sheet S for forming the packaging box 1 of this embodiment has the end wall 11, side wall 12, and inclined wall 15 aligned horizontally (left-right direction in FIG. 3). In addition, in the blank sheet S, the first flap 21, end wall 11, and end flap 31 are aligned vertically (up-down direction in FIG. 3). In addition, in the blank sheet S, the second flap 22, side wall 12, and side flap 32 are aligned vertically.

As shown in Figure 4, the box material 2 for forming the packaging box 1 of this embodiment is formed by joining a joining piece 13 to the inner surface of the side wall 12 of a blank sheet S (see Figure 3) to form the body 10, and the top cover portion 20 (see Figure 1) and the bottom cover portion 30 are not yet assembled.
The box material 2 is delivered to a customer in a flat state by folding the body 10 with the end walls 11 and the inclined walls 15 arranged flat.
When folding the body 10 , it may be folded at the fold line between the inclined wall 15 and the side wall 12 , or it may be folded at the fold line between the end wall 11 and the side wall 12 .

In the blank sheet S shown in Figure 3 and the side flap 32 of the box material 2 (see Figure 4), the second connecting hole 50B on the opposite side to the inclined wall 15 is positioned closer to the center in the lateral direction (longitudinal direction) of the side flap 32 than the first connecting hole 50A on the inclined wall 15 side.
In other words, in the side flap 32, the end portion on the central side of the second connecting hole 50B (the bottom of the recess 52) is closer to the lateral (longitudinal) center of the side flap 32 than the end portion on the central side of the first connecting hole 50A (the bottom of the recess 52).
In the blank sheet S, the inclined wall 15 side of the side flap 32 is the side on which the inclined wall 15 will be disposed when the body portion 10 shown in FIG. 4 is formed.

In addition, in the blank sheet S and the side flap 32 of the box material 2 (see FIG. 4), the pressing portion 51 of the second connecting hole 50B is positioned closer to the center of the side flap 32 in the lateral direction (longitudinal direction) than the pressing portion 51 of the first connecting hole 50A.

Next, a method for assembling the packaging box 1 of this embodiment will be described.
First, the box material 2 is formed into a cylindrical shape from a folded state as shown in Fig. 4. At this time, with the end wall 11 and the inclined wall 15 arranged flat, the inclined wall 15 and the side wall 12 are bent at right angles, and the end wall 11 and the side wall 12 are also bent at right angles to form the body 10 into a rectangular cylindrical shape.

The side flaps 32, 32 are then folded inwardly of the torso 10, and the side flaps 32, 32 are arranged side by side at the lower opening of the torso 10. At this time, the leading edges of the side flaps 32, 32 are arranged with a gap between them.

Next, as shown in FIG. 5, the end flap 31 is folded at the fold line L10 so that it forms a mountain fold when viewed from the outside. This allows the left and right insertion pieces 61, 61 of the end flap 31 to be positioned closer to the base end than the first connecting hole 50A and the second connecting hole 50B, which are aligned to the left and right.

Then, while stretching the end flap 31 flat, insert the left and right insertion pieces 61, 61 into the first connecting hole 50A and the second connecting hole 50B, respectively, as shown in FIG. 6. Also, the protruding piece 62 straddles the butt joints of the side flaps 32, 32 and overlaps the outer surfaces of the side flaps 32, 32.

When both insertion pieces 61, 61 of the end flap 31 are inserted into the first connecting hole 50A and the second connecting hole 50B, respectively, one of the insertion pieces 61 of the end flap 31 first abuts against the bottom of the recess 52 of the first connecting hole 50A on the inclined wall 15 side. At this time, the other insertion piece 61 of the end flap 31 does not abut against the bottom of the recess 52 of the second connecting hole 50B on the opposite side of the inclined wall 15 side.

In this state, when the tip of the end flap 31 is further pushed toward the center of the body 10 in the front-to-rear direction, the first connecting hole 50A is pushed toward the center of the body 10 in the front-to-rear direction by one of the insertion pieces 61.
As a result, the tip of the front end flap 31 pushes the left side flap 32 backward (the side opposite the inclined wall 15 in the front-to-rear direction). Also, the tip of the rear end flap 31 pushes the right side flap 32 forward (the side opposite the inclined wall 15 in the front-to-rear direction).

Additionally, the side wall 12 together with the side flap 32 is pushed out in the front-rear direction to the side opposite the inclined wall 15, so that the left and right side walls 12, 12 are misaligned in the front-rear direction.
Then, the inclined wall 15 is pulled by the side wall 12 and bent relative to the end wall 11 , and is inclined relative to the end wall 11 and the side wall 12 .

7, the tip of the end flap 31 is pushed toward the center in the front-rear direction of the body 10 until the engagement recess 63 of the end flap 31 engages with the bottom of the recess 52 of the second connecting hole 50B. This connects the side flaps 32, 32 and the end flap 31 to form the lower cover 30. At this time, the tip edges of the side flaps 32, 32 are butted against each other without any gaps.
When the lower cover portion 30 is formed, the inclined wall 15 is inclined relative to the end wall 11 and the side wall 12, and the body portion 10 is formed into a hexagonal cylindrical shape.
In this manner, the body portion 10 and the bottom cover portion 30 shown in Fig. 1 are formed to form the packaging box 1. Furthermore, after the contents are placed in the body portion 10, the top cover portion 20 is closed.

In the above-described packaging box 1, blank sheet S, box material 2, and method of assembling the packaging box 1, when assembling the hexagonal packaging box 1 shown in Fig. 1, first, the body 10 of the box material 2 is formed into a rectangular tubular shape as shown in Fig. 4. Next, when both insertion pieces 61, 61 of the end flap 31 are inserted into the first connecting hole 50A and the second connecting hole 50B of the side flap 32, the first connecting hole 50A is pushed out by the insertion pieces 61, and the inclined wall 15 is bent relative to the end wall 11.
In this way, in the present invention, the box material 2 shown in FIG. 4 is delivered to the customer in a folded state, and the body 10 can be easily formed into a hexagonal cylindrical shape by hand as shown in FIG. 7, so that the hexagonal packaging box 1 can be easily assembled.

When the packaging box 1 of this embodiment is assembled, as shown in FIG. 7, the pressing portion 51 of the first connecting hole 50A and the pressing portion 51 of the second connecting hole 50B, which are aligned in the left-right direction, are positioned at the same position in the front-to-rear direction, and the left and right pressing portions 51, 51 evenly press the tip of the end flap 31, thereby stabilizing the end flap 31 relative to the left and right side flaps 32, 32.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention.
The shapes and sizes of the first connecting hole 50A, the second connecting hole 50B, the insertion piece 61 and the protruding piece 62 shown in Figure 4 are not limited, and are formed appropriately taking into consideration the ease of assembly between the tip of the end flap 31 and the first connecting hole 50A and the second connecting hole 50B and how unlikely they are to come loose.

For example, as in the blank sheet S1 shown in FIG. 8, a notch 65 and a protrusion 66 may be formed on the side edge of the insertion piece 61 of the end flap 31. In such a blank sheet S1 and the box material and packaging box formed from this blank sheet S1, when the insertion piece 61 is inserted into the first connecting hole 50A or the second connecting hole 50B, the notch 65 and the protrusion 66 abut against the edge of the first connecting hole 50A or the second connecting hole 50B from the direction opposite to the insertion direction of the insertion piece 61. This makes it difficult for the insertion piece 61 to come out of the connecting hole 50.

In the packaging box 1 of this embodiment, as shown in FIG. 1, an opening is formed in the top lid portion 20 provided at the upper opening of the body portion 10, but the configuration of the top lid portion 20 is not limited. For example, an top lid portion having the same structure as the bottom lid portion 30 may be provided at the upper opening of the body portion 10. Furthermore, the packaging box 1 does not need to have an top lid portion 20.

The packaging box 1 of this embodiment is made of corrugated cardboard, but the packaging box of the present invention can be formed from various known paperboards.

REFERENCE SIGNS LIST 1 Packaging box 2 Box material 10 Body 11 End wall 12 Side wall 13 Joint piece 15 Inclined wall 20 Top cover 21 First flap 22 Second flap 30 Bottom cover 31 End flap 32 Side flap 50A First connecting hole 50B Second connecting hole 51 Pressing portion 52 Depression 53 Cover plate 61 Insertion piece 62 Protruding piece 63 Engagement recess 65 Cutout 66 Protrusion S Blank sheet S1 Blank sheet (other embodiments)

Claims (5)

A hexagonal cylindrical body portion having front and rear end walls, left and right side walls, and two inclined walls formed between the end walls and the side walls adjacent to each other;
A lid portion provided on the opening of the body portion,
The two inclined walls are disposed at diagonal positions of the body portion,
The lid portion is
front and rear end flaps respectively connected to one of the upper and lower edges of the end walls;
and left and right side flaps respectively connected to one of the upper and lower edges of the side walls,
the end flaps overlap the outer surfaces of the side flaps;
The side flaps are formed with front and rear connection holes,
The end flap has a tip formed with left and right insertion pieces and a protruding piece disposed between the left and right insertion pieces,
The insertion piece is inserted into the connection hole, and the protruding piece is overlapped on the outer surface of the side flaps ,
The two connecting holes arranged to the left and right are arranged at the same position in the front-rear direction of the end portions of the side flaps on the central side in the front-rear direction of the blank sheet for forming a packaging box,
The end wall, the side wall and the inclined wall are aligned in a transverse direction,
The side walls and the side flaps are aligned longitudinally;
In the side flap, of the two connecting holes arranged side by side,
The connecting hole on the inclined wall side
The connecting hole on the opposite side of the inclined wall is
A blank sheet characterized in that it is arranged toward the center of the side flaps in the lateral direction. 2. The blank sheet according to claim 1 ,
A pressing portion is formed on an edge portion of the side flap on a lateral center side of the connecting hole, the pressing portion protruding toward an opposite side of the lateral center side of the side flap,
In the side flap, of the two connecting holes aligned in the horizontal direction,
The pressing portion of the connecting hole on the inclined wall side is
The pressing portion of the connecting hole on the opposite side of the inclined wall side is
A blank sheet characterized in that it is arranged toward the center of the side flaps in the lateral direction. A hexagonal cylindrical body portion having front and rear end walls, left and right side walls, and two inclined walls formed between the end walls and the side walls adjacent to each other;
A lid portion provided on the opening of the body portion,
The two inclined walls are disposed at diagonal positions of the body portion,
The lid portion is
front and rear end flaps respectively connected to one of the upper and lower edges of the end walls;
and left and right side flaps respectively connected to one of the upper and lower edges of the side walls,
the end flaps overlap the outer surfaces of the side flaps;
The side flaps are formed with front and rear connection holes,
The end flap has a tip formed with left and right insertion pieces and a protruding piece disposed between the left and right insertion pieces,
The insertion piece is inserted into the connection hole, and the protruding piece is overlapped on the outer surface of the side flaps ,
The two connecting holes arranged to the left and right are arranged at the same position in the front-rear direction at the center end of the side flap,
The body portion has the end wall and the inclined wall arranged flatly,
In the side flap, of the two connecting holes arranged side by side,
The connecting hole on the inclined wall side
The connecting hole on the opposite side of the inclined wall is
A box material characterized in that it is arranged toward the center of the side flaps in the lateral direction. The box material according to claim 3 ,
A pressing portion is formed on an edge portion of the side flap on a lateral center side of the connecting hole, the pressing portion protruding toward an opposite side of the lateral center side of the side flap,
In the side flap, of the two connecting holes aligned in the horizontal direction,
The pressing portion of the connecting hole on the inclined wall side is
The pressing portion of the connecting hole on the opposite side of the inclined wall side is
A box material characterized in that it is arranged toward the center of the side flaps in the lateral direction. A hexagonal cylindrical body portion having front and rear end walls, left and right side walls, and two inclined walls formed between the end walls and the side walls adjacent to each other;
A lid portion provided on the opening of the body portion,
The two inclined walls are disposed at diagonal positions of the body portion,
The lid portion is
front and rear end flaps respectively connected to one of the upper and lower edges of the end walls;
and left and right side flaps respectively connected to one of the upper and lower edges of the side walls,
the end flaps overlap the outer surfaces of the side flaps;
The side flaps are formed with front and rear connection holes,
The end flap has a tip formed with left and right insertion pieces and a protruding piece disposed between the left and right insertion pieces,
The insertion piece is inserted into the connection hole, and the protruding piece is overlapped on the outer surface of the side flaps ,
A method for assembling a packaging box in which the two connecting holes arranged to the left and right are arranged at the same position in the front-to-rear direction at the center end of the side flap in the front-to-rear direction ,
In a state where the end wall and the inclined wall of the body are arranged flat,
In the side flap, of the two connecting holes arranged side by side,
The connecting hole on the opposite side of the inclined wall is larger than the connecting hole on the inclined wall side.
The side flap is disposed toward the center in the lateral direction,
a step of bending the inclined wall and the side wall at a right angle while the end wall and the inclined wall are arranged flat, and bending the end wall and the side wall at a right angle to form the body into a rectangular tubular shape;
and inserting the insertion piece of the end flap into the connecting hole of the side flap and using the insertion piece to push the connecting hole toward the center in the front-to-rear direction of the side flap, thereby inclining the inclined wall relative to the end wall and forming the body into a hexagonal cylindrical shape.

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