JP7099221B2 - Packaging box - Google Patents

Description

The present invention relates to a packaging box in which the height can be changed to change the content.

Conventionally, as a packaging box of this type, the one described in Patent Document 1 is known.
The packaging box of Patent Document 1 is provided with a second fold line on a side surface separated from the first fold line, which is a boundary position between the side surface and the top surface, and is vertically formed on each boundary line of each side plate. It has a cuttable line that extends in the direction.

In this packaging box, the height of the side surface can be changed by setting the boundary position between the side surface and the top surface to the first fold line or the second fold line, and as a result, the internal capacity of the box can be changed.

Japanese Unexamined Patent Publication No. 2014-125237

In the packaging box of Patent Document 1, for example, when the height of the box is changed to be small, the sheet is broken along a cuttable line extending in the lateral direction to separate the pair of long top plates. Therefore, the operation for changing the height of the packaging box to a small size is complicated. In addition, there was a request to prevent the top plate (top plate) from opening after the packaging box was formed.

It is an object of the present invention to solve the above-mentioned problems and to provide a packaging box which can be easily operated when changing the height and can keep the top plate in a closed state.

In order to solve the above problems, the packaging box of the present invention has a body portion including a pair of front and rear end walls and a pair of left and right side walls, a bottom plate closing the lower opening of the body portion, and the body portion. It is provided with a top plate that closes the upper opening. A cuttable line is formed at each ridge line portion connecting the pair of front and rear end walls and the pair of left and right side walls. The top plate has a pair of front and rear inner flaps connected to the upper edges of the both end walls and a pair of left and right outer flaps connected to the upper edges of the both side walls and superposed on the inner flaps. Includes. A slit is formed in the abutting portion between the pair of left and right outer flaps so as to be orthogonal to the abutting portion. The inner flap is provided with an insertion flap that is raised from the inner flap, folded outside the pair of left and right outer flaps, and inserted into the slit. The insertion flap includes a first insertion flap that is inserted into the slit when the inner flap and the outer flap are bent at each upper edge portion. Further, the insertion flap includes a second insertion flap that is inserted into the slit when the inner flap and the outer flap are bent by a bending guide line passing through each end of the cuttable line. At least a part of the second insertion flap is integrally provided with the first insertion flap.

In the present invention, when forming a packaging box having a large height (large content), the inner flap and the outer flap are bent at each upper edge. At this time, among the insertion flaps, the first insertion flap is raised from each inner flap, and these are folded outside the outer flap and inserted into the slit. As a result, a packaging box having a large height can be obtained.
In addition, when forming a packaging box with a small height (small content), a bendable guide line is cut at each ridgeline, and the inner flap and the outer flap are cut through each end of the cuttable line. Bend at. Then, of the insertion flaps, the second insertion flap is raised from each inner flap, and these are folded outside the outer flap and inserted into the slit. This gives a packaging box with a small height.
As described above, according to the present invention, the operation for changing the height is easy.

Further, in both the case of forming a packaging box having a large height and the case of forming a packaging box having a small height, the first insertion flap and the second insertion flap are folded over the outside of the outer flap to form a slit. Is plugged into. Therefore, after the packaging box is formed, the top plate can be suitably maintained in the closed state.

Further, since at least a part of the second insertion flap is integrally provided with the first insertion flap, the second insertion flap can be provided with the inner flap in a space-efficient manner.

Further, it is preferable that the slit is formed with a protruding piece protruding into the slit. In this configuration, since the projecting piece comes into contact with the first insertion flap or the second insertion flap inserted into the slit, it is possible to preferably restrict the first insertion flap or the second insertion flap from coming out of the slit. Therefore, the top plate can be suitably maintained in the closed state.

Further, it is preferable that the first insertion flap can be erected on the upper edge portion of the end wall, and the second insertion flap can be erected on the bending guide line. In this configuration, it is possible to suitably secure the overlap margin of the first insertion flap or the second insertion flap with respect to the outer flap. Therefore, the top plate can be more preferably maintained in the closed state.

In the present invention, it is possible to obtain a packaging box in which the operation for changing the height, that is, the operation for changing the content is easy, and the top plate can be kept closed.

It is a perspective view which looked at the packaging box which concerns on one Embodiment of this invention from the front upper right. It is a figure which shows the blank sheet of the packaging box which concerns on one Embodiment of this invention, and is the top view which arranged so that the inner surface side can be seen. It is an enlarged plan view of the blank sheet which shows a part of the inner flap and the outer flap. It is explanatory drawing in the case of forming the packaging box which concerns on one Embodiment of this invention in a form with a large height, and is the perspective view which shows the state which raised the inner flap and the outer flap after closing a bottom wall. It is a perspective view which shows the state which the inner flap is bent along the upper edge part of the end wall, and the 1st insertion flap is raised from the inner flap. FIG. 3 is a perspective view showing a state in which an outer flap is bent along an upper edge portion of a side wall to form a slit over a butt portion. It is a perspective view for demonstrating the slit formed over the butt portion. It is explanatory drawing in the case of forming the packaging box which concerns on one Embodiment of this invention in a form with a small height, and is the state which the end wall is bent along the bending guide line, and the 2nd insertion flap is raised. It is a perspective view which shows. It is a perspective view which shows the state which the outer flap is bent along the ruled line, and the slit which penetrates both outer flaps is formed. It is a perspective view of the packaging box formed in the form of a small height by inserting the second insertion flap into the slit formed through both outer flaps, as seen from the front upper right.

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

As shown in FIG. 1, the packaging box 1 (hereinafter, may be simply referred to as “box 1”) includes a body portion 10 including a pair of front and rear end walls 11 and 12 and a pair of left and right side walls 13 and 14. .. Further, the box 1 includes a bottom plate 20 that closes the lower opening of the body portion 10, and a top plate 30 that closes the upper opening of the body portion 10.

As shown in FIG. 2, the box 1 is formed by folding a blank sheet S obtained by cutting out a single corrugated cardboard sheet into mountain folds or valley folds at each ruled line. As shown in FIG. 1, the box 1 has a form in which the height of the box 1 is increased to increase the internal capacity (large mode), or as shown in FIG. 10, the height of the box 1 is reduced. It can be formed in a form (small mode) in which the amount is small. Details of forming the box 1 will be described later. The blank sheet S shown in FIG. 2 is arranged so that the inner surface side can be seen.
Hereinafter, the form of the box 1 will be described in the state of the large mode.

As shown in FIG. 2, each ruled line (folded line) partitioning the end walls 11, 12, the side walls 13, 14, the bottom plate 20 (see FIG. 1) and the top plate 30 (see FIG. 1) of the blank sheet S is the blank sheet S. It is a linear groove formed by pushing the inner surface.
A notch (half-cut line, etc.) may be formed in the ruled line. By doing so, it becomes easy to bend the blank sheet S at the ruled line.

As shown in FIG. 1, the front end wall 11 is formed in a quadrangle shape (see FIG. 2).
A left side wall 13 is continuously provided on the left edge portion of the front end wall 11 via a ruled line L1 (see FIG. 2).
The left side wall 13 extends rearward from the left edge of the front end wall 11. The left side wall 13 is formed at a right angle to the front end wall 11. The left side wall 13 is formed in a quadrangle shape.

The ridge line portion (corner portion) of the front end wall 11 and the left side wall 13 is composed of a ruled line L1 and a cuttable line ST1 continuous with the upper end (one end) of the ruled line L1. The front end wall 11 and the left side wall 13 are continuous via the ruled line L1 and the cuttable line ST1.

A trailing edge wall 12 is continuously provided on the trailing edge of the left side wall 13 via a ruled line L2 (see FIG. 2).
The trailing edge wall 12 extends to the right from the trailing edge of the left wall 13. The rear end wall 12 is formed at a right angle to the left side wall 13. The rear end wall 12 has the same shape as the front end wall 11.

The ridge line portion (corner portion) between the left side wall 13 and the rear end wall 12 is composed of a ruled line L2 and a cuttable line ST2 continuous with the upper end (one end) of the ruled line L2. The left side wall 13 and the rear end wall 12 are continuous via the ruled line L2 and the cuttable line ST2.

A right side wall 14 is continuously provided on the right edge portion of the rear end wall 12 via a ruled line L3 (see FIG. 2).
The right side wall 14 extends forward from the right edge of the rear end wall 12. The right side wall 14 is formed at a right angle to the rear end wall 12. The right side wall 14 has the same shape as the left side wall 13.

The ridgeline portion (corner portion) between the rear end wall 12 and the right side wall 14 is composed of a ruled line L3 and a cuttable line ST3 continuous with the upper end (one end) of the ruled line L3. The rear end wall 12 and the right side wall 14 are continuous via the ruled line L3 and the cuttable line ST3.

A joining piece 15 is continuously provided on the leading edge portion of the right side wall 14 via a ruled line L4 (see FIG. 2). The joint piece 15 is formed in a band shape along the leading edge portion of the right side wall 14.
The joining piece 15 is a portion to be joined by an adhesive to the right end portion of the inner surface of the front end wall 11.

The ridge line portion (corner portion) between the right side wall 14 and the front end wall 11 is composed of a ruled line L4 and a cuttable line ST4 continuous with the upper end (one end) of the ruled line L4. The right side wall 14 and the front end wall 11 are continuous via the ruled line L4 and the cuttable line ST4 via the joint piece 15.

The cuttable lines ST1 to ST4 are cut when the box 1 having a small height (small content) is formed, as will be described later. As a result, the heights of the front end wall 11, the rear end wall 12, the left side wall 13, and the right side wall 14 of the box 1 can be changed small, and as a result, the height of the box 1 becomes small.

As shown in FIG. 2, one bending guide line 16 extending in the longitudinal direction of each wall is formed on the inner surface of the front end wall 11, the rear end wall 12, the left side wall 13, the right side wall 14, and the joint piece 15. ing. The bending guide line 16 passes through the lower end portions of the cuttable lines ST1 to ST4 (the upper end portions of the ruled lines L1 to L4) and extends to each wall and the joint piece 15.

By joining the joining piece 15 to the right inner surface of the front end wall 11 while bending the blank sheet S (see FIG. 2) as described above along the ruled lines L1 to L4, the front end wall 11, the left side wall 13, the rear end wall 12 and the joint piece 15 are joined. The right side wall 14 forms a square tubular body portion 10 (see FIG. 1).

As shown in FIG. 1, the bottom plate 20 is composed of front and rear bottom inner flaps 21 and 21 and left and right bottom outer flaps 22 and 22. As shown in FIG. 2, the front and rear bottom inner flaps 21 and 21 are connected to the lower edges of the front and rear end walls 11 and 12 via ruled lines L5 and L6. The left and right outer bottom flaps 22 and 22 are connected to the lower edges of the left and right side walls 13 and 14 via ruled lines L7 and L8.
As shown in FIG. 1, the bottom plate 20 is formed by arranging a pair of left and right outer bottom flaps 22 and 22 on the lower side of a pair of front and rear bottom inner flaps 21 and 21. The inner flaps 21 and 21 and the outer bottom flaps 22 and 22 are joined by an adhesive tape 20a or an adhesive.

The upper opening of the body 10 is closed by the top plate 30. The top plate 30 is composed of a pair of front and rear inner flaps 31, 31 and a pair of left and right outer flaps 32, 32.
As shown in FIG. 2, the inner flap 31 on the front side is continuously provided on the upper edge portion of the front end wall 11 via the ruled line L9. As shown in FIG. 1, the inner flap 31 on the front side extends rearward from the upper edge portion of the front end wall 11. The inner flap 31 on the front side is formed at a right angle to the front end wall 11.

As shown in FIG. 3, a first insertion flap 33 is formed at the center of the inner flap 31 on the front side in the left-right direction. The first insertion flap 33 is divided into a substantially square shape in the inner flap 31 on the front side by the cutting guide wire L10. The cutting guide line L10 extends in a substantially gate shape starting from the upper edge portion (ruled line L9) of the front end wall 11. The cutting guide line L10 is composed of a perforated line formed by intermittently forming a notch. The interval between the cuts of the cutting guide line L10 can be arbitrarily set.

The first insertion flap 33 is raised from the inner flap 31 by cutting open the cutting guide wire L10, and can be erected on the upper edge of the front end wall 11 at a right angle (parallel to the front end wall 11) with respect to the inner flap 31. (See FIG. 5). Then, as shown in FIG. 1, the first insertion flap 33 is folded over the abutting portion of the front end central portion of the outer surfaces of the pair of left and right outer flaps 32, 32.
As shown in FIG. 3, the first insertion flap 33 has a width W1 smaller than the width of the inner flap 31.

The first insertion flap 33 is divided into two regions by a bending guide line L11 parallel to the ruled line L9. The first insertion flap 33 can be bent at the bending guide line L11. The insertion piece 34, which is one of the two regions of the first insertion flap 33, is folded back toward the lower side of the outer flap 32 via the bending guide line L11, and the slits 36, 36 described later of the outer flaps 32, 32. It is inserted in (see Fig. 1).

A second insertion flap 35 is formed in a portion extending from the central portion in the left-right direction on the upper portion of the front end wall 11 to the central portion in the left-right direction of the first insertion flap 33 continuous thereto. The second insertion flap 35 is divided into substantially tongue pieces by the cutting guide wire L12. The cutting guide line L12 extends in a substantially U-shape starting from the bending guide line 16 of the front end wall 11, and is composed of linear and bending line-shaped cut lines. The tip portion 35a of the second insertion flap 35 is held by the first insertion flap 33 via a total of three connecting portions 35b, and is integrally provided with the first insertion flap 33.
The second insertion flap 35 has a width W2 smaller than the width W1 of the first insertion flap 33.
As will be described later, such a second insertion flap 35 can be erected on the bending guide line 16 when forming a box 1 having a small height.

As shown in FIGS. 2 and 3, in the state of the blank sheet S, the first insertion flap 33 and the second insertion flap 35 are formed in a single plate shape with the inner flap 31.

As shown in FIG. 2, the inner flap 31 on the rear side is continuously provided on the upper edge portion of the rear end wall 12 via the ruled line L13. The inner flap 31 on the rear side has a shape symmetrical with respect to the inner flap 31 on the front side, and as shown in FIG. 1, extends forward from the upper edge portion (ruled line L13) of the rear end wall 12. .. The rear inner flap 31 is formed at a right angle to the rear end wall 12.

As shown in FIG. 2, the inner flap 31 on the rear side is also formed with the first insertion flap 33, similarly to the inner flap 31 on the front side. Similarly, the first insertion flap 33 on the rear side is provided with the insertion piece 34. Further, the inner flap 31 on the rear side is formed with a second insertion flap 35 formed from the upper part of the rear end wall 12, similarly to the front side.

As shown in FIG. 1, the left outer flap 32 is connected to the upper edge of the left wall 13 via a ruled line L14. The left outer flap 32 extends to the right from the upper edge of the left wall 13. The left outer flap 32 is formed at right angles to the left wall 13.
The front and rear ends of the left outer flap 32 are overlapped with the left upper surface of the front and rear inner flaps 31, 31.

A slit 36 is formed at the tip edge portion (right edge portion) of the outer flap 32 on the left side. As shown in FIG. 5, the slits 36 are formed in pairs at intervals in the front-rear direction. Both slits 36, 36 are formed at positions where the insertion pieces 34, 34 of the two insertion flaps 33, 33, which are overlapped on the outer surface of the outer flap 32, can be inserted, as will be described later. The slit 36 extends to the left from the tip edge of the outer flap 32 (see FIGS. 2, 6, and 7). Insert pieces 34, 34 are inserted through both slits 36, 36 (see FIG. 1).

The front-rear width of the slit 36 corresponds to the thickness of the blank sheet S. Further, as shown in FIG. 3, the left-right width of the slit 36 is set to the width of W1 / 2, which is half the size of the width W1 of the first insertion flap 33.

In the slit 36, a square projecting piece 37 is arranged via the bending guide line L37. The bent guide line L37 is formed by a perforated cut line. When the insertion piece 34 of the insertion flap 33 is inserted into the slit 36, the projecting piece 37 is pushed by the insertion piece 34 and bent downward toward the outer flap 32 while pressing the facing surface of the insertion piece 34. Press.
The protruding piece 37 is not limited to a square shape, and various shapes can be adopted.

As shown in FIG. 1, the first insertion flap 33 is superposed on the front and rear ends of the outer flap 32 on the left side. That is, the inner flap 31 and the first insertion flap 33 sandwich the abutting portion and the front and rear end portions of the outer flap 32 from above and below.

As shown in FIG. 2, notches 38, 38 are formed at the front and rear edge portions of the outer flap 32. The cutouts 38, 38 are continuously formed in the slits 36, 36.

As shown in FIG. 1, the outer flap 32 on the right side is connected to the upper edge of the right wall 14 via the ruled line L15. The outer flap 32 on the right side has a symmetrical shape with respect to the outer flap 32 on the left side, and extends from the upper edge portion of the right side wall 14 toward the left. The right outer flap 32 is formed at right angles to the right wall 14.

Similar to the outer flap 32 on the left side, the outer flap 32 on the right side also has a pair of slits 36, 36 formed in the front-rear direction. In the outer flap 32 on the right side, both slits 36 and 36 correspond to both slits 36 and 36 in the outer flap 32 on the left side. Notches 38, 38 are also formed in the outer flap 32 on the right side.

When the left and right outer flaps 32, 32 form a box 1 having a large height, the ends of the left and right outer flaps 32, 32 are butted against each other at the central portion in the left-right direction, as shown in FIGS. 6 and 7.
As a result, in the box 1 having a large height, as shown in FIGS. 6 and 7, one long slit 36A continuous in the left-right direction is formed. Since the left-right width of the slit 36 alone is W1 / 2 (see FIG. 3) as described above, the width of the slit 36A, which is the length of two, is the same as the width W1 of the first insertion flap 33. Become. Therefore, the insertion piece 34 of the first insertion flap 33 can be inserted into the slit 36A (see FIG. 1).

On the other hand, the left and right outer flaps 32, 32 are configured such that the ends of the left and right outer flaps 32, 32 overlap each other at the central portion in the left-right direction, as shown in FIG. 9, when the box 1 having a small height is formed.
As a result, in the box 1 having a small height, as shown in FIG. 9, one short slit 36B continuous in the left-right direction is formed. The slit 36B communicates in the vertical direction at the overlapping portion. The width of the slit 36B is formed to be the same width W2 as the width of the second insertion flap 35. Therefore, the tip portion 35a of the second insertion flap 35 can be inserted into the slit 36B (see FIG. 10).

Next, the procedure for forming the box 1 will be described. In the following procedure, the bending order of the front and rear inner flaps 31, 31 and the bending order of the left and right outer flaps 32, 32 are not particularly limited.
First, a procedure for forming a box 1 having a small height (large content) will be described.
First, the body portion 10 is formed from the state of the blank sheet S (see FIG. 2).
Subsequently, as shown in FIG. 4, the inner bottom flaps 21 and 21 and the outer bottom flaps 22 and 22 are closed, and the lower opening of the body portion 10 is closed by the bottom plate 20. The bottom plate 20 is closed with an adhesive tape 20a, an adhesive, or the like. When housing the contents in the box 1, it is carried out through the upper opening of the open body portion 10.

Subsequently, as shown in FIG. 5, both inner flaps 31 and 31 are bent along the upper edges of the front and rear end walls 11 and 12. Then, the first insertion flaps 33 and 33 are separated from the inner flaps 31 and 31 via the ruled lines L9 and L13 of the inner flaps 31 and 31 and the cutting guide lines L10 and L10.

Then, as shown in FIG. 6, both outer flaps 32 and 32 are bent along the upper edges of the left and right side walls 13 and 14, and these are overlapped on both inner flaps 31 and 31. As a result, the tip edges of both outer flaps 32 and 32 are abutted against each other.

After that, as shown in FIG. 7, the first insertion flap 33 on the rear side in the raised state is bent toward the notches 38, 38 of the outer flaps 32, 32, and the insertion piece 34 is bent, and this is slit. Insert into 36A. Then, the insertion piece 34 is inserted into the slit 36A by pushing the protruding pieces 37, 37 of the slit 36A downward. As a result, the insertion piece 34 is held in the slit 36A. The same operation is performed for the first insertion flap 33 on the front side.
In this way, the upper opening of the body portion 10 is closed by the top plate 30, and the box 1 having a large height is formed.

Next, a procedure for forming a box 1 having a small height (small content) will be described. Also in this case, in the same manner as described above, the body portion 10 is formed from the state of the blank sheet S (see FIG. 2), and the bottom plate 20 is closed.
Subsequently, as shown in FIG. 8, the cuttable lines ST1 to ST4 at each corner are cut, and the upper portions of the end walls 11 and 12 and the inner flaps 31 and 31 continuous with these are cut along the bending guide line 16. Bend together. Then, both the second insertion flaps 35 and 35 are separated via the bending guide wires 16 and 16 and the cutting guide wires L12 and L12, and these are raised at right angles from the inner flaps 31 and 31.

After that, as shown in FIG. 9, the upper portions of the left and right end walls 13 and 14 and the outer flaps 32 and 32 continuous to them are integrally bent along the bending guide line 16, and the outer flaps 32 and 32 are put together. Overlap at the center in the left-right direction. Then, the slits 36, 36 of both outer flaps 32, 32 overlap each other in the vertical direction, and a slit 36B having the same width W2 as the width W2 of the second insertion flap 35 opens on the upper surface of the outer flap 32.

Subsequently, the tips 35a and 35a of the second insertion flaps 35 and 35 in the raised state are bent and inserted into the formed slits 36B and 36B as shown in FIG. Then, the tip portions 35a and 35a are inserted into the slit 36B so as to push the protruding pieces 37 of the slit 36B downward. As a result, each tip portion 35a is held in the slit 36B.
In this way, the upper opening of the body portion 10 is closed by the top plate 30, and the box 1 having a small height is formed.

In the present embodiment described above, the operation for forming the box 1 having a large height (large content) and the operation for forming the box 1 having a small height (small content) are easy. ..
Therefore, it is suitable for accommodating containers whose height changes depending on their growth, such as cutlery, fruits and vegetables, and flowers.

Further, when forming the box 1 having a large height, the first insertion flap 33 is folded over the outside of the outer flap 32 and inserted into the slit 36A. Further, when forming the box 1 having a small height, the second insertion flap 35 is folded outside the outer flap 32 and inserted into the slit 36B. Therefore, after the box 1 is formed, the top plate 30 can be suitably maintained in the closed state.

Further, since the second insertion flap is partially provided integrally with the first insertion flap 33, the second insertion flap 35 can be provided in the inner flap 31 with high space efficiency.

Further, since the protruding piece 37 is formed in the slit 36, it is possible to suitably restrict the first insertion flap 33 or the second insertion flap 35 from coming out of the slit 36. Therefore, the top plate 30 can be suitably maintained in the closed state.

Further, the first insertion flap 33 is raised from the upper edge portion of the inner flap 31, and the second insertion flap 35 is raised from the bending guide line 16. Therefore, it is possible to suitably secure the overlap margin of the first insertion flap 33 or the second insertion flap 35 with respect to the outer flap 32. Therefore, the top plate 30 can be more preferably maintained in the closed state.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and can be appropriately modified without departing from the spirit of the present invention.
For example, the width W1 of the first insertion flap 33 and the width W2 of the second insertion flap 35 can be formed as appropriate. In this case, the first insertion flap 33 and the second insertion flap 35 may be formed in a shape in which the tip side is wider than the start side. By forming in this way, it is possible to more preferably regulate the removal of the first insertion flap 33 or the second insertion flap 35 from the slit 36.

Further, a locking hook or the like that is locked to the slit 36 may be provided with respect to the first insertion flap 33 and the second insertion flap 35.

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

1 Packaging box (box)
10 Body 11 End wall (front end wall)
12 End wall (rear end wall)
13 Side wall (left wall)
14 Side wall (right side wall)
16 Folded guide wire 20 Bottom plate 30 Top plate 31 Inner flap 32 Outer flap 33 1st insertion flap 35 2nd insertion flap 36 Slit 36A Slit 36B Slit 37 Protruding piece

Claims (3)

A body consisting of a pair of front and rear end walls and a pair of left and right side walls,
The bottom plate that closes the lower opening of the body and
The top plate closing the upper opening of the body and
A pair of front and rear end walls and a pair of left and right side walls are provided with a cuttable line formed on each ridge line portion.
The top plate is
A pair of front and rear inner flaps connected to the upper edges of the wall at both ends,
Includes a pair of left and right outer flaps that are connected to the upper edges of the walls on both sides and are superimposed on the inner flaps.
A slit is formed in the abutting portion between the pair of left and right outer flaps so as to be orthogonal to the abutting portion.
The inner flap is provided with an insertion flap that is raised from the inner flap, folded outside the pair of left and right outer flaps, and inserted into the slit.
The plug-in flap is
The first insertion flap to be inserted into the slit when the inner flap and the outer flap are bent at each upper edge portion, and
The inner flap and the outer flap are provided with a second insertion flap that is inserted into the slit when the inner flap and the outer flap are bent by a bending guide line passing through each end of the cuttable line .
The second insertion flap is a packaging box characterized in that at least a part thereof is integrally provided with the first insertion flap. The packaging box according to claim 1 , wherein the slit is formed with a protruding piece protruding into the slit. The first insertion flap can be erected on the upper edge of the end wall.
The packaging box according to claim 1 or 2, wherein the second insertion flap can be erected on the bent guide wire.

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