JP3217753U - Packaging box - Google Patents

Abstract

The present invention provides a packaging box that has a sealed end type lid and clearly displays that it has been opened without performing a special operation other than a normal opening operation.
A cylindrical body is formed by four side plates 14, 16, 18, and 20 that are formed of a box-forming piece 12 and connected in order. An inner lid piece 32 extends from one end of the first side plate 14 in a direction perpendicular to the connecting direction. An outer lid piece 52 is extended at the end of the second side plate 18 on the inner lid piece 32 side, separated by an outer lid crease line 54. A pressing portion 58 surrounded by an outer lid crease line 54 and an opening break line 56 is provided at an end portion of the second side plate 18 on the outer lid piece 52 side. The outer lid piece 52 is divided into a main body portion 52 a and both end corner portions 52 b by a pair of auxiliary breaking lines 60 that reach the left and right side ends of the outer lid piece 52 starting from the left and right ends of the opening breaking line 56. . When the break lines 56 and 60 are broken and opened, both end corners 52b rise due to the repulsive force of bending of the outer lid crease line 54.
[Selection] Figure 2

Description

  The present invention relates to a packaging box having a sealed end type lid that closes an end of a cylindrical body, and more particularly, to a packaging box having a function of displaying that it has been opened.

  As one form of the packaging box, the outer lid piece and the inner lid piece are extended to one end of the cylindrical body formed of a plurality of side plates, and the outer lid piece is superimposed on the outside of the inner lid piece, There is a packaging box in which an inner lid piece and an outer lid piece are glued to each other to form a sealed end type lid portion, and is widely used for packaging pharmaceutical products and the like.

  In medical institutions such as hospitals and dispensing pharmacies, when medicines are stored on storage shelves, the medicines in the packaging box are often stored by arranging them in different types or by stacking them in multiple layers. Since the packaging box and the unopened packaging box have almost the same appearance, it is not easy to distinguish which packaging box has been opened. Therefore, conventionally, a packaging box having a function of displaying that it has been opened has been proposed.

  For example, as disclosed in Patent Document 1, a sealed end type lid portion composed of an outer lid piece (top lid) and an inner lid piece (top lid) overlaps the inner lid piece. There is a packaging box provided with a side flap, the side flap is separated from the side plate by a crease line, and the side flap is provided with an extended display portion surrounded by the crease line and the U-shaped break line. . In the extended display portion, an indication indicating that the package has been opened is displayed. In the assembled state before opening, the extended display portion is inside the outer lid piece and the inner lid piece and cannot be visually recognized from the outside. After being opened, the user breaks the U-shaped break line and pulls the extension display part up from the side flaps, and the extension display part is pulled out of the box and the side flaps are folded back, When the lid piece is tilted and resealed, the display on the extended display part is visible from the outside.

Utility Model Registration No. 319434

  However, in the packaging box of Patent Document 1, after opening the lid portion, the user can break the U-shaped break line so that the extension display portion can be visually recognized from the outside, and the extension display portion is side flapped. It takes a lot of work because it requires a special operation to pull it up.

  The present invention has been made in view of the above-described background art, has a sealed end type lid, and is clearly opened without any special operation other than normal opening operation. The purpose is to provide a packaging box to be displayed.

The present invention comprises a single box-forming piece, and the box-forming piece has a plurality of side plates connected in parallel to each other, and is a first of the plurality of side plates. An inner lid piece extends at one end of the side plate in a direction perpendicular to the connecting direction, and an end of the second side plate that is one of the plurality of side plates on the inner lid piece side The outer lid piece is divided and extended by an outer lid crease line, and the outer side of the second side plate is surrounded by the outer lid crease line and the opening break line. The outer cover piece is formed by a pair of auxiliary break lines that reach the left and right side ends of the outer cover piece starting from the left and right ends of the opening breaking line. Separated by
In an assembled state, the plurality of side plates form a cylindrical body, the first side plate faces the second side plate, and the outer lid piece overlaps the outside of the inner lid piece, A body portion is glued to the inner lid piece to form a lid portion that closes an end of the cylindrical body;
The user pushes the pressing portion to break the breaking line for opening, causes the body portion of the outer lid piece to break the auxiliary breaking line, the lid portion is opened, and the lid portion is opened. Then, the both end corners separated from the outer cover piece are packaging boxes that rise due to the repulsive force of bending of the outer cover crease line.

  After the lid is opened, the box-forming piece is held in a closed state by holding the body portion of the outer lid piece, the inner lid piece, or the pressing portion. A sealing mechanism is provided.

  In the assembled state, the both end corners of the outer lid piece overlap the outside of the inner lid piece, and the outer surface of the region of the inner lid piece that overlaps the both end corners of the outer lid piece is both ends of the outer lid piece. It is preferable to use a configuration that is colored in a color different from the outer surface of the corner. Alternatively, a side flap is provided at one end of the cylindrical body, and in an assembled state, the side flap is disposed inside the inner lid piece, and the both end corners of the outer lid piece are connected to the inner lid piece. The structure is such that the outer surface of the side flap overlaps with the side flaps without overlapping and overlaps with the corners of both ends of the outer lid piece and is colored in a color different from the outer surfaces of the corners of both ends of the outer lid piece. It is preferable to do.

  The packaging box of the present invention has a simple structure and is easy to assemble and can be opened easily. In addition, after opening, it is automatically displayed that the package has been opened without any special operation, and even if the packaging boxes containing the stored items are stored side by side or stacked, any packaging box can be opened. You can easily tell if it is done.

It is a perspective view which shows the assembly state of 1st embodiment of the packaging box of this invention. It is the expanded view which looked at the box body formation piece which forms the packaging box of 1st embodiment from the surface side. It is a perspective view (a) which shows the process of assembling the box formation piece of FIG. 2, (b). It is a perspective view which shows the unsealed state of the packaging box of 1st embodiment. The perspective view (a) which shows the resealed state of the packaging box of 1st embodiment, the perspective view (b) which saw through the outer cover piece and the press part, and the front view (c) which shows a mode that it arranges and stores in a storage shelf It is. FIG. 3 is a development view (a) showing the coloring of the box-forming piece of FIG. 2 and a front view (c) showing how the packaging boxes of the first embodiment are stacked and stored on a storage shelf. It is a perspective view which shows the assembly state of 2nd embodiment of the packaging box of this invention. It is the expanded view which looked at the box body formation piece which forms the packaging box of 2nd embodiment from the surface side. It is a perspective view (a) which shows the process of assembling the box formation piece of Drawing 8, (b). It is a perspective view which shows the unsealed state of the packaging box of 2nd embodiment. The perspective view (a) which shows the resealed state of the packaging box of 2nd embodiment, the perspective view (b) which saw through the outer cover piece and the press part, and the front view (c) which shows a mode that it stores in a storage shelf. It is. FIG. 10 is a development view (a) showing the coloring of the box-forming piece of FIG. 8 and a front view (c) showing how the packaging boxes of the second embodiment are stacked and stored on a storage shelf.

  Hereinafter, 1st embodiment of the packaging box of this invention is described based on FIGS. The packaging box 10 of this embodiment is a substantially rectangular parallelepiped box as shown in FIG. 1, and is formed by assembling a single box forming piece 12 formed of cardboard or the like.

  As shown in FIG. 2, the box-forming piece 12 has four side plates 14, 16, 18, and 20 connected in parallel to each other. The side plates 14, 16, 18, and 20 have the same length in the width direction orthogonal to the connecting direction, and the length in the connecting direction is substantially equal to each other because the side plates 14 and 18 are long. Are short and almost equal to each other. At the end portion on the side plate 14 side, a pasting piece 22 to be glued to the back surface of the end portion of the side plate 20 in an assembled state is provided. The glue piece 22 and the four side plates 14, 16, 18, 20 are divided by crease lines 24, 26, 28, 30, respectively. Hereinafter, the side plate 14 is referred to as a first side plate 14, and the side plate 18 is referred to as a second side plate 18.

  A substantially rectangular inner lid piece 32 extends from one end of the first side plate 14 in a direction perpendicular to the connecting direction, and is separated from the first side plate 14 by a crease line 34. The extending length of the inner lid piece 32 is substantially the same as the connecting direction length of the side plates 16 and 20. An insertion piece 36 (reseal mechanism) extends from the distal end of the inner lid piece 32 and is separated from the inner lid piece 32 by a crease line 38. The extension length of the insertion piece 36 is about 2/5 of the extension length of the inner lid piece 32, and both corners on the tip side are rounded and chamfered.

  A substantially rectangular outer bottom piece 40 extends from the end of the first side plate 14 opposite to the inner lid piece 32 and is separated from the first side plate 14 by a crease line 42. The extending length of the outer bottom piece 40 is substantially the same as the length of the side plates 16 and 20 in the connecting direction.

  A trapezoidal side flap 44 extends from an end of the side plate 16 on the inner lid piece 32 side, and is separated from the side plate 16 by a crease line 46. The extension length of the side flap 44 is about ½ of the length in the connecting direction of the first and second side plates 14, 18. A trapezoidal side flap 48 extends from the end of the side plate 16 opposite to the side flap 44 and is separated from the side plate 16 by a crease line 50. The extending length of the side flap 48 is about ½ of the length in the connecting direction of the first and second side plates 14, 18.

  A substantially rectangular outer lid piece 52 extends from the end of the second side plate 18 on the side flap 44 side, and is separated from the second side plate 18 by an outer lid crease line 54. The extending length of the outer lid piece 52 is substantially the same as the length of the side plates 16 and 20 in the connecting direction. Further, a pressing portion 58 surrounded by an outer lid crease line 54 and a U-shaped breaking break line 56 is provided at an end of the second side plate 18 on the outer lid piece 52 side, and the outer lid A pair of auxiliary break lines 60 that reach the left and right side ends of the outer lid piece 52 from the left and right ends of the opening break line 56 are provided on the piece 52. And by this auxiliary | assistant fracture | rupture line 60, the outer cover piece 52 is divided | segmented into the main-body part 52a and a pair of both-ends corner part 52b. Here, both end corners 52b are provided in a substantially rectangular shape.

  A substantially rectangular inner bottom piece 62 extends from the end of the second side plate 18 opposite to the outer lid piece 52, and is separated from the second side plate 18 by a crease line 64. The extending length of the inner bottom piece 62 is slightly shorter than the length of the side plates 16 and 20 in the connecting direction.

  A side flap 66 having a shape that is substantially line symmetrical with the side flap 44 extends from the end of the side plate 20 on the outer lid piece 52 side, and is separated from the side plate 20 by a crease line 68. In addition, a side flap 70 having a shape substantially axisymmetric to the side flap 48 extends from the end of the side plate 16 opposite to the side flap 66, and is separated from the side plate 20 by a crease line 72.

  Next, an example of a method for assembling the box forming piece 12 will be described. FIG. 2 is a view of the box-forming piece 12 as viewed from the front side. Hereinafter, the folding method in which the front side of the box-forming piece 12 is convex is referred to as normal folding, and the folding method in which the back side is convex is referred to as reverse folding.

  First, the crease line 26 is normally folded and the first side plate 14 and the glued piece 22 are overlapped on the two side plates 16 and 18. Then, after applying glue on the surface of the glue piece 22, the crease line 30 is normally folded, and the end of the back surface of the side plate 20 is glued to the glue piece 22. The box forming piece 12 is shipped from the manufacturing factory of the packaging box 10 in this folded state.

  Next, in a factory or the like for packaging items such as pharmaceuticals, the crease lines 24, 26, 28, and 30 are each normally folded at 90 degrees to form a rectangular cylinder. In this state, the first side plate 14 faces the second side plate 18. Then, in order to provide a bottom portion that closes one end portion of the cylindrical body, the side flaps 48 and 70 are each normally folded by 90 degrees with the crease lines 50 and 72, and the inner bottom piece 62 is normally folded by 90 degrees with the crease lines 64. Thereafter, paste is applied to the surface of the inner bottom piece 62, the outer bottom piece 40 is forwardly folded at 90 degrees along the crease line 42, and the back surface of the outer bottom piece 40 is glued to the inner bottom piece 62. Now that a bottom end of the seal end type that closes one end of the cylindrical body is formed, the contents are inserted from the other open end.

  As shown in FIG. 3 (a), the side flaps 44 and 66 are each folded forward at 90 degrees along the crease lines 46 and 68 to provide a lid for closing the other end of the cylinder when the contents are inserted. . Then, the crease line 38 is forward-folded, the insertion piece 36 is forward-folded to 90 degrees, the inner lid piece 32 is forward-folded to 90 degrees by the crease line 34, and as shown in FIG. Is inserted into the gap between the second side plate 18 and the side flaps 44 and 66 and locked.

  Thereafter, glue is applied to the surface of the inner lid piece 32, the outer lid piece 52 is normally folded at 90 degrees along the crease line 54, and the back surface of the main body portion 52 a of the outer lid piece 52 is glued to the inner lid piece 32. Thus, a seal end type lid is formed, and the assembled state shown in FIG. 1 is obtained, and the contents are shipped in this state.

  When opening the lid of the packaging box 10, the pressing portion 58 of the second side plate 18 is pushed with a finger to break the U-shaped breaking line 56 for opening, The auxiliary breaking line 60 is broken by pulling the lid piece 32 and pulling it up. When the side flaps 44 and 66 are further pulled up, the cylinder lid is opened, and the contents contained therein can be taken out. The operation for opening the lid is almost the same as the conventional one, but the characteristic is that the opening corners 52a separated from the outer lid piece 52 cause the bending repulsion force of the outer lid crease line 54 by performing this opening operation. It will automatically start up.

  When the lid is to be resealed after the contents are returned to the packaging box 10, the side flaps 44 and 66 that have been lifted are brought back to their original positions, and the main body 52a and the inner lid piece of the pulled-up outer lid 52 are returned. 32 is returned to its original position, and the insertion piece 36 is inserted into the gap between the second side plate 18 and the side flaps 44 and 66 and locked. Thus, the resealed state shown in FIGS.

  In the resealed state, as shown in FIG. 5A, both end corners 52b separated from the outer lid piece 52 rise and protrude above the lid. For example, when the medicines contained in the packaging box 10 are stored in the storage shelf HD, when they are placed upright as shown in FIG. 5C, the both end corners 52b are displayed as opened, and which box is opened. It ’s easy to tell if it ’s done.

  Also, as shown in FIG. 6 (a), the opening confirmation is made by coloring the surface side of the inner lid piece 32 and the surface side of the outer lid piece 52 in different colors or displaying characters and symbols. To make it easier. For example, when the packaging box 10 containing the medicines is placed side by side as shown in FIG. 6B, the through holes formed in the outer lid piece 52, that is, the corners 52b at both ends rise. Since the inner lid piece 32 can be seen from the through hole, the color of the inner lid piece 32 is displayed as opened, and it is possible to easily identify which box has been opened.

  As described above, the packaging box 10 can be easily assembled with a simple structure, and can be easily opened and resealed. Further, after opening, it is automatically displayed that the package has been opened without performing any special operation, and any packaging box 10 is stored even if the packaging boxes 10 containing the stored items are stored side by side or stacked. It is easy to tell whether has been opened.

  Next, 2nd embodiment of the packaging box of this invention is described based on FIGS. Here, the same components as those of the packaging box 10 are given the same reference numerals and the description thereof is omitted. As shown in FIG. 7, the packaging box 74 of this embodiment has substantially the same outer shape as the packaging box 10, and is formed by assembling a single box-forming piece 76 formed of cardboard or the like.

  The box-forming piece 76 has many parts similar to the box-forming piece 12 of the packaging box 10, and the main difference is that the inner lid piece 32 and the insertion piece 36 are replaced with an inner lid piece 78 having a new shape. And the side flaps 44 and 66 are provided with slot-like slits 44a and 66a, and the shape of both end corners 52b of the outer lid piece 52 is changed. Hereinafter, these differences will be described in order.

  At the end of the first side plate 14 on the side flap 44 side, an isosceles trapezoidal inner lid piece 78 having a narrowed tip is extended, and the first side plate 14 is formed by a crease line 34. Are separated. The extending length of the inner lid piece 32 is about 4/5 of the length of the side plates 16 and 20 in the connecting direction, and the engaging portions 78 (see FIG. 5) bulge in a circular arc shape at both end corners on the front end side. 1) and 78 (2) are provided as a pair.

  In the side flap 44 at a position near the outer lid piece 52, an elongated slit 44a is formed obliquely. Similarly, at the position of the side flap 66 near the outer lid piece 52, an elongated slit 66a is formed obliquely. The shapes of the side flaps 66 and the slits 66a are substantially line-symmetric with the shapes of the side flaps 44 and the slits 44a with the outer lid piece 52 interposed therebetween. The resealing mechanism of the packaging box 74 is composed of engaging portions 78 (1) and 78 (2) of the inner lid piece 78 and slits 44a and 66a.

  Similar to the outer lid piece 52 of the packaging box 10, the outer lid piece 52 extended to one end portion of the second side plate 18 is divided into a main body portion 52 a and both end corner portions 52 b by an auxiliary breaking line 60. Yes. However, although the both end corners 52b of the packaging box 10 are substantially square, the both end corners 52b of the packaging box 74 are substantially triangular, and the design of the opened display is changed.

  Next, an example of a method for assembling the box forming piece 76 will be described. FIG. 8 is a view of the box-forming piece 76 from the front side. Hereinafter, the folding method in which the front side of the box-forming piece 76 is convex is referred to as normal folding, and the folding method in which the back side is convex is referred to as reverse folding.

  First, the crease line 26 is normally folded and the first side plate 14 and the glued piece 22 are overlapped on the two side plates 16 and 18. Then, after applying glue on the surface of the glue piece 22, the crease line 30 is normally folded and the end of the back surface of the side plate 20 is glued to the glue piece 22. The box forming piece 12 is shipped from the manufacturing factory of the packaging box 74 in this folded state.

  Next, in a factory or the like for packaging items such as pharmaceuticals, the crease lines 24, 26, 28, and 30 are each normally folded at 90 degrees to form a rectangular cylinder. In this state, the first side plate 14 faces the second side plate 18. Then, in order to provide a bottom portion that closes one end portion of the cylindrical body, the side flaps 48 and 70 are each normally folded by 90 degrees with the crease lines 50 and 72, and the inner bottom piece 62 is normally folded by 90 degrees with the crease lines 64. Thereafter, paste is applied to the surface of the inner bottom piece 62, the outer bottom piece 40 is forwardly folded at 90 degrees along the crease line 42, and the back surface of the outer bottom piece 40 is glued to the inner bottom piece 62. Now that a bottom end of the seal end type that closes one end of the cylindrical body is formed, the contents are inserted from the other open end. The process up to here is the same as the method for assembling the box-forming piece 12 described above.

  As shown in FIG. 9 (a), the side flaps 44 and 66 are each folded forward at 90 degrees along the crease lines 46 and 68 to provide a lid for closing the other end of the cylindrical body when the contents are inserted. . Then, the inner lid piece 78 is normally folded at 90 degrees along the crease line 34, and the inner lid piece 78 is overlaid on the side flaps 44 and 66 as shown in FIG.

  Thereafter, paste is applied to the surface of the inner lid piece 78 other than the engaging portion 78 (1) and the engaging portion 78 (2), and the outer lid piece 52 is normally folded at 90 degrees along the crease line 54. The back surface of the main body 52 a of the outer lid piece 52 is glued to the inner lid piece 32. At this time, both end corners 52 b of the outer lid piece 52 do not overlap the inner lid piece 78, but overlap the side flaps 44 and 66 disposed inside the inner lid piece 78. Thus, a seal end type lid is formed, and the assembled state shown in FIG. 7 is obtained, and the contents are shipped in this state.

  When opening the lid portion of the packaging box 74, the pressing portion 58 of the second side plate 18 is pushed with a finger to break the U-shaped breaking line 56 for opening, and the inner portion 52a of the outer lid piece 52 and the inner portion The auxiliary breaking line 60 is broken by pulling the lid piece 78 and pulling it up. Now, the state shown in FIG. 10 is obtained, and when the side flaps 44 and 66 are further pulled up, the lid portion of the cylindrical body is opened, and the contents contained therein can be taken out. The operation for opening the lid is almost the same as the conventional one, but the characteristic is that the opening corners 52a separated from the outer lid piece 52 cause the bending repulsion force of the outer lid crease line 54 by performing this opening operation. It will automatically start up.

  When the lid is to be resealed after the contents are returned to the packaging box 74, the side flaps 44 and 66 that have been lifted are brought back to their original positions, and the main body 52a and the inner lid piece of the pulled-up outer lid 52 are returned. Defeat 78 and return.

  Further, when the position near the center of the main body 52a and the pressing portion 58 is pushed down with a finger, the side flaps 44 and 66 are pressed by the inner lid piece 78 and bent downward, and the engaging portion 78 (1) of the inner lid piece 78 is bent. 78 (2) are inserted and engaged with the slits 44a and 66a, respectively. Since the engaging portions 78 (1) and 78 (2) are not glued to the main body portion 52a, the engaging portions 78 (1) and 78 (2) become the main body portion when the main body portion 52a bends downward. It can be naturally separated from 52a and smoothly inserted into the slits 44a and 66a. When the operation of pushing down the main body 52a with a finger is stopped, the inner lid piece 78 is held in a state where it overlaps the side flaps 44 and 66, and the cylindrical ends are closed, and FIGS. 11 (a) and 11 (b). The re-sealed state shown in.

  In the resealed state, as shown in FIG. 11A, both end corners 52b separated from the outer lid piece 52 stand up and protrude above the lid. For example, when the medicines contained in the packaging box 74 are stored in the storage shelf HD, when they are placed side by side as shown in FIG. 11 (c), both end corners 52b are displayed as opened, and which box is opened. It ’s easy to tell if it ’s done.

  Also, as shown in FIG. 12 (a), the surface side of the side flaps 44 and 66 and the surface side of the outer lid piece 52 are colored in different colors from each other, or characters and symbols are displayed to open the side flaps. Make confirmation easy. For example, when packaging boxes 74 containing medicines are placed side by side as shown in FIG. 12 (b), the through holes formed in the outer lid piece 52 as shown in FIG. 12 (b). That is, since the side flaps 44 and 66 can be seen from the through-hole formed by raising the corner portions 52b, the color of the side flaps 44 and 66 is displayed as being opened, and it is easy to identify which box has been opened. Can do.

  The packaging box 74 has a substantially triangular shape at both end corners 52 a of the outer lid piece 52, but may have a substantially rectangular shape similar to the packaging box 10. However, if it is made substantially square, after opening the lid portion, the re-sealing mechanism (engaging portions 78 (1), (2) and slits 44a, 66a are opened from the substantially square through-holes formed by raising both end corners 52b. This part may be exposed and may deteriorate in appearance, so that the reseal mechanism is not exposed here by making it approximately triangular.

  As described above, the packaging box 74 can obtain the same effects as the packaging box 10 although the structure of the reseal mechanism is different from the packaging box 10 described above.

  In addition, the packaging box of this invention is not limited to the said embodiment. For example, the shape of both end corners of the outer lid piece may be a shape other than a substantially rectangular shape or a triangular shape as long as the intended operation of the present invention is possible. Similarly, the reseal mechanism may have a different structure from the packaging boxes 10 and 74, and the reseal mechanism may be omitted as necessary. In addition, the size of the box, the material, the shape of the bottom, and the like can be appropriately changed according to the application.

10, 74 Packaging box 12, 76 Box forming piece 14 First side plate 16, 20 Side plate 18 Second side plate 32 Inner lid piece 36 Insertion piece (reseal mechanism)
52 Outer cover piece 52a Main body 52b Both end corners 54 Outer cover crease line 56 Opening break line 58 Pressing part 60 Auxiliary break line 44, 66 Side flaps 44a, 66a Slit (Resealing mechanism)
78 Inner lid pieces 78a (1), 78 (2) Engagement part (reseal mechanism)

Claims (4)

It consists of a single box-forming piece, and the box-forming piece is
An inner lid piece has a plurality of side plates connected in parallel to each other, and one end of the first side plate, which is one of the plurality of side plates, perpendicular to the connecting direction. Extended,
An outer lid piece is divided and extended by an outer lid crease line at an end of the inner lid piece side of the second side plate, which is one of the plurality of side plates,
A pressing portion surrounded by the outer lid crease line and the breaking line for opening is provided at an end of the second side plate on the outer lid piece side,
The outer lid piece is divided into a main body part and both end corners by a pair of auxiliary breaking lines that reach the left and right side ends of the outer lid piece starting from the left and right ends of the opening breaking line,
In an assembled state, the plurality of side plates form a cylindrical body, the first side plate faces the second side plate, and the outer lid piece overlaps the outside of the inner lid piece, A body portion is glued to the inner lid piece to form a lid portion that closes an end of the cylindrical body;
The user pushes the pressing portion to break the breaking line for opening, causes the body portion of the outer lid piece to break the auxiliary breaking line, the lid portion is opened, and the lid portion is opened. Then, the both end corners separated from the outer cover piece stand up by the repulsive force of bending of the outer cover crease line.   After the lid is opened, the box-forming piece is held in a closed state by holding the body portion of the outer lid piece, the inner lid piece, or the pressing portion. The packaging box according to claim 1, wherein a sealing mechanism is provided. In the assembled state, the both end corners of the outer lid piece overlap the outside of the inner lid piece,
3. The packaging box according to claim 1, wherein an outer surface of an area of the inner lid piece that overlaps both corners of the outer lid piece is colored in a color different from an outer surface of both corners of the outer lid piece. A side flap is provided at one end of the cylindrical body,
In the assembled state, the side flap is disposed inside the inner lid piece, and the both end corners of the outer lid piece overlap the side flap without overlapping the inner lid piece,
3. The packaging box according to claim 1, wherein an outer surface of an area of the side flap that overlaps both corners of the outer lid piece is colored in a color different from an outer surface of the both corners of the outer lid piece.

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