JP7627609B2 - Packaging Box - Google Patents

Description

This invention relates to a sealed end carton type packaging box that contains products and has an opening that is sealed with glue.

Conventionally, sealed end carton-type packaging boxes, in which the forming pieces of the box body are assembled three-dimensionally, have been used as packaging boxes for storing, transporting, and storing products, etc. Sealed end carton-type packaging boxes have various functions. For example, the storage carton disclosed in Patent Document 1 has a resealing function, and the opening of the box body is closed by a pair of inner flaps provided on a pair of side surfaces facing each other and a pair of outer flaps provided on a pair of side surfaces on which the inner flaps are not provided, and the outside of the inner flaps folded inward is covered with an outer flap and glued. The outer flap located on the outer layer of the pair of outer flaps that are stacked on top of each other is provided with a raised box piece separated by a break line formed on both sides of the center, and an insert piece protruding from the raised box piece is provided at the tip of the raised box piece. A slit portion into which the insert piece is inserted is provided on the side surface that is continuous with the outer side surface having the raised box piece. With this storage carton, after opening, the raised box piece is raised from the outer flap, folded back to the side surface, and the insert piece is inserted into the slit portion. The insert locks and can be resealed.

The packaging box disclosed in Patent Document 2 has a cushioning function and is equipped with a partition piece that connects to the side edge of a first adhesive piece that is glued to the inside of a box body consisting of four sides and divides the inside, and a second adhesive piece that connects to the side edge of the partition piece and is glued to the inside of the side face facing the side face to which the first adhesive piece is glued. The upper end of the partition piece is equipped with a pressing piece that presses down the top of the contained item, an overlapping piece that is provided at the tip of the pressing piece and overlaps with the back surface of the side face to which the first adhesive piece is glued, and a knob that protrudes from the tip of the overlapping piece and abuts against the flap or top cover piece of the box body. With this packaging box, the contained item can be surrounded by the partition pieces and pressing pieces, allowing it to be stored or transported in a cushioning manner.

JP 2019-94099 A Utility Model Registration No. 3119149

In the case of the above background art, it has either a cushioning function or a resealing function, but not both. Furthermore, when the contents are easily torn such as a PTP sheet, a protective function may be required to prevent the sides from deforming when force is applied from the outside when opening, or to prevent fingers or the like that break the sides and protrude into the internal space from interfering with the contents, but it has not been considered to provide such a protective function.

This invention was made in consideration of the problems in the background art described above, and aims to provide a packaging box with a simple structure that can cushion the contents, protect the contents from damage when opened, and can be resealed after opening.

The present invention is a packaging box consisting of one box-forming piece, with a side surface assembled to a cylinder, a lower lid for closing the lower opening of the cylinder, and an upper lid for closing the upper opening. A cushioning piece is provided in the internal space of the cylinder in a cantilevered state near the upper lid to close the internal space, the cushioning piece being located between the contents contained in the internal space and the upper lid, the length from the base end to the tip end in the cantilevered state being longer than the width between the sides of the internal space, and the free end side faces the lower lid side at a predetermined height. An opening break line is provided on the side surface at a position that is closed in accordance with the height of the cushioning piece. An insertion piece for resealing is provided on the free end of the cushioning piece, and after the opening break line is cut to open the upper lid side, the insertion piece is engaged with the cylinder, and the cushioning piece covers the outlet formed by cutting the opening break line, allowing resealing.

The box-forming pieces have side surfaces connected in parallel to each other, and a glued piece is provided on one end of the side surfaces in the connecting direction of the side surfaces and glued to the back surface of the side surface at the other end of the side surfaces. The cushioning piece is provided at the end of the glued piece that intersects with the connecting direction with the side surfaces and is close to the top cover, via a fold line that serves as the axis of rotation for the cushioning piece to rotate.

A guide piece is provided on the side edge of the adhesive piece opposite the adjacent side surface, and the free end of the cushioning piece is engaged by the guide piece to the back surface of the side surface that faces approximately parallel to the side surface to which the adhesive piece is glued.

The insertion piece is inserted from the opening edge of the tear line to the back side of the side and locked. An insertion slit is provided on the side opposite the side having the rotation shaft into which the insertion piece is inserted and locked, and the insertion piece is inserted from the insertion slit to the back side of the side and locked, and resealed.

A pair of side edges of the cushioning piece that intersect with the rotation axis are cut inward, providing a clue for lifting the cushioning piece. The top cover is separated from the side surface by a break line, and may be separated by cutting the break line after opening.

There are four side surfaces, the tear line for opening is provided continuously on three of the four side surfaces, and the remaining side surface has a fold line for opening that is a rotation axis around which the top cover moves to open, and both ends of the fold line for opening are continuous with the ends of the tear line for opening. The glued piece is glued to the side surface having the fold line for opening, and the glued piece has a fold line for opening that coincides with the fold line for opening, and the part of the glued piece that is closer to the top cover than the fold line for opening is also glued to the side surface. As a result, when the tear line for opening is cut and the top cover is opened and closed around the fold line for opening as the axis of rotation, the cushioning piece and the insertion piece open and close following the opening and closing of the top cover.

The cushioning strip may be marked with a print or other marking that allows the user to recognize that the package has been opened.

The packaging box of the present invention has a simple structure, can cushion the contents, protect the contents from damage when opened, and can be resealed after opening. By having these three functions, even contents made of PTP sheets with easily breakable aluminum lids, for example, can be safely stored and opened and removed without damage.

1A is a perspective view of a packaging box according to a first embodiment of the present invention, FIG. 1B is a perspective view showing the box after it has been opened, and FIG. 1C is a perspective view showing the box after it has been opened and the cushioning piece has been opened. FIG. 2 is a development view of the packaging box of this embodiment. FIG. 2 is a perspective view showing the packaging box of this embodiment in a resealed state. FIG. 11 is a development view showing a modified example of the packaging box of this embodiment. 10A to 10C are development views showing an assembly process for a modified example of the packaging box of this embodiment. 13A and 13B are top views showing an assembly process of a modified example of the packing box of this embodiment. 13A is a perspective view of a packaging box according to a second embodiment of the present invention, FIG. 13B is a perspective view showing the box in an opened state, and FIG. 13C is a perspective view showing the box in a resealed state. FIG. 4 is a development view of a packaging box according to a second embodiment of the present invention.

The following describes an embodiment of the present invention with reference to the drawings. Figures 1 to 3 show a first embodiment of the present invention, in which a packaging box 10 is formed by assembling a single box-forming piece 12 made of cardboard or the like.

Figure 2 is a development view of the box-forming piece 12 as seen from the front, and the box-forming piece 12 is formed by connecting the sides 14, 16, 18, and 20 in parallel to one another. The lengths of the fold lines 24, 26, 28, and 30 at the connecting portions of the sides 14, 16, 18, and 20 are all the same, and the widths in the connecting direction are long for the sides 14 and 18 and approximately equal to one another, while the widths of the sides 16 and 20 are slightly shorter and approximately equal to one another. Furthermore, a glued piece 22 is provided on the side edge of the side 20, which is glued to the back surface of the side 14 when the packaging box 10 is assembled. The glued piece 22 is approximately the same size as the side 14. The sides 14, 16, 18, and 20 and the glued piece 22 are each separated by the fold lines 24, 26, 28, and 30.

A rectangular outer top cover piece 32 is provided at one end of side 14 perpendicular to the connecting direction with side 16, separated by a break line 34. The break line 34 is also a fold line for opening that serves as the axis of rotation for opening the top cover 84 described below. The outer top cover piece 32 is rectangular in size to close the openings of sides 14, 16, 18, and 20. At the end of side 14 opposite to the break line 34, an outer bottom cover piece 36 of the same shape as the outer top cover piece 32 is provided, separated by a fold line 38.

A trapezoidal flap 40 is provided at the end of the side 16 adjacent to the break line 34 of the side 14, separated by a fold line 42. A flap 44 of the same shape as the flap 40 is provided at the end of the side 16 opposite the fold line 42, separated by a fold line 46. A break line 48 for opening is provided at a position close to the fold line 42 of the side 16. The break line 48 for opening is a straight line connecting the corner surrounded by the fold line 42 and the fold line 24 to a position of the fold line 26 slightly away from the fold line 42, and is located opposite a cushioning piece 72 (described later) located in the internal space when the packaging box 10 is assembled. The break line 48 for opening may be a zipper line.

In the portion of the side surface 18 adjacent to the fold line 42, an inner upper lid piece 50, which is a rectangle slightly smaller than the outer upper lid piece 32, is provided, separated by a fold line 52. At the end of the side surface 18 opposite the fold line 52, an inner lower lid piece 54 of the same shape as the inner upper lid piece 50 is provided, separated by a fold line 56. A break line 58 for opening is provided in a position on the side surface 18 near the fold line 52. The break line 58 for opening is a curved line connecting the fold line 26 and the fold line 28, and is curved so that its center is away from the fold line 52. The end of the break line 58 for opening located at the fold line 26 is continuous with the end of the break line 48 for opening. A break line 60 for disposal is provided in a position on the side surface 18 near the fold line 56. The break line 60 for disposal is a curved line connecting the vicinity of both ends of the fold line 56, and is curved so that its center is away from the fold line 56.

At the end of the side 20 adjacent to the fold line 52 of the side 18, a flap 62 of the same shape as the flap 40 is provided, separated by a fold line 64. At the end of the side 20 opposite the fold line 64, a flap 66 of the same shape as the flap 62 is provided, separated by a fold line 68. At a position on the side 20 close to the fold line 64, an opening break line 70 of the same shape as the opening break line 48 is provided. The opening break line 70 is a straight line connecting the corner surrounded by the fold line 64 and the fold line 30 to a position slightly away from the fold line 64 of the fold line 28, and is a position that is closed in the internal space opposite a cushioning piece 72 described later when the packaging box 10 is assembled. The opening break line 70 may be a zipper line.

In the portion of the glued piece 22 adjacent to the fold line 64 of the side surface 20, a cushioning piece 72 is provided, separated by a fold line 74. The cushioning piece 72 is drum-shaped, and the tip 72a on the opposite side to the fold line 74 is formed as a straight line parallel to the fold line 74, and a pair of side edges 72b, 72c intersecting the fold line 74 are curved and cut out toward the center of the cushioning piece 72, making it easy to operate and provide a clue when raising the cushioning piece 72. The length between the fold line 74, which is the base end of the cushioning piece 72, and the tip 72a is slightly longer than the width of the inner space of the packaging box 10 intersecting the fold line 74, i.e., slightly longer than the length of the side surfaces 16, 20 in the connecting direction. When the packaging box 10 is assembled, the cushioning piece 72 closes the inner space in a cantilever state, and the fold line 74 becomes the base end supporting the cantilever state, and the tip 72a becomes the free end.

The tip 72a of the cushioning piece 72 has an insertion piece 76 separated by a fold line 78. The tip of the insertion piece 76 is curved so that the center of the tip is convex to the side. The fold lines 74 and 78 have cuts to make it easier to fold.

Next, a method for assembling the packaging box 10 of this embodiment will be described. Here, Figure 2 shows the front surface of the box-forming piece 12 of the packaging box 10, and a folding method in which the front surface of the box-forming piece 12 is convex is called a forward folding, and a folding method in which the back surface is convex is called a reverse folding.

First, the fold line 74 is folded forward, the cushioning piece 72 and the insertion piece 76 are placed on the backside of the glued piece 22, and then the fold line 28 is folded forward. Then, glue 80 is applied to the front side of the glued piece 22. The glue 80 is applied in two straight lines along the fold line 30 and the side edge 22a opposite the fold line 30. Next, the fold line 24 is folded forward, and the backside of the side surface 14 is glued to the glued piece 22 with glue 80. This places the box-forming piece 12 in a folded state, and it is shipped in this folded state.

Next, in a factory or the like where the contents 86 are stored and packaged, the fold lines 24, 26, 28, and 30 are each folded 90° to form a rectangular cylinder, the flaps 40 and 62 are folded forward at the fold lines 42 and 64, glue 82 is applied to the surface of the inner top cover piece 50 and the inner top cover piece 50 is folded forward at the fold line 52, the outer top cover piece 32 is folded forward at the break line 34, the back side of the outer top cover piece 32 is glued to the surface of the inner top cover piece 50, and the top cover 84 is formed at one opening of the cylinder to close it.

When assembled into a rectangular cylinder, the cushioning piece 72, which was folded over on the back side of the glued piece 22, opens at an acute angle at the fold line 74 due to the elasticity of the box-forming piece 12, rising from the glued piece 22, and the tip of the insertion piece 76 abuts against the back side of the side surface 18. The cushioning piece 72 is slightly longer than the length of the sides 16 and 20 in the connecting direction, and the insertion piece 76 is continuously long at the tip 72a, so it does not open parallel to the top cover 84 but is positioned diagonally relative to the top cover 84. In this way, the cushioning piece 72 is in a cantilever state with the fold line 74 as the base end, and the free end faces the opposite side to the top cover 84, dividing the inner space of the box diagonally into a part close to the top cover 84 and the other part. The peripheral part of the cushioning piece 72 is approximately aligned with the opening break lines 48, 58, and 70, or is positioned slightly below them.

In this state, the contents 86 are inserted from the end opposite the top lid 84. The contents 86 are, for example, a PTP sheet containing tablets. The upper end of the contents 86 abuts against the buffer piece 72 and does not reach the top lid 84, creating a buffer space between the top lid 84 and the buffer piece 72. Then, the flaps 44, 66 are folded forward at the fold lines 46, 68, glue 88 is applied to the surface of the inner bottom lid piece 54, the inner bottom lid piece 54 is folded forward at the fold line 56, the outer bottom lid piece 36 is folded forward at the fold line 38, the back surface of the outer bottom lid piece 36 is glued to the surface of the inner bottom lid piece 54, the bottom lid 90 is formed at the opening of the cylinder and closed, and the packaging is completed as shown in FIG. 1(a). The buffer piece 72 is located between the contents 86 and the top lid 84, and the tip 72a, which is the free end, faces the bottom lid 90. A buffer space is created between the buffer piece 72 and the top cover 84, providing a high buffer effect.

Next, a method of using the packaging box 10 of this embodiment will be described. When using the contents 86, first, the opening break line 58 on the side surface 18 is pressed and cut, and the top lid 84 side is raised, and while cutting the opening break lines 48, 70 that are continuous with both ends, the top lid 84 side is moved around the break line 34 as a rotation axis to open, forming the removal opening 92 as shown in FIG. 1(b). The edge of the removal opening 92 opens at an angle to the top lid 84 because the opening break line 58 on the side surface 18 is low and the opening break lines 48, 70 are slanted and reach the break line 34, which is the upper end of the side surface 14.

When the outlet 92 is opened, the inside of the outlet 92 is lightly closed by the buffer piece 72 positioned at an angle, and the buffer piece 72 is positioned at a position that coincides with the edge of the opening of the outlet 92 or slightly below it, covering the contents 86. Therefore, even if force is applied from the outside when cutting the opening break line 58, the contents 86 are covered by the buffer piece 72, so that the deformed side 18 and fingers that break the side 18 and protrude into the internal space do not interfere with the contents 86, and the contents 86 are protected from damage. Even if the contents 86 is a PTP sheet and the tablets are contained in an aluminum sheet that is easily broken, the aluminum sheet will not break. In addition, even if the outlet 92 is opened, the contents 86 will not fall out accidentally because it is lightly closed by the buffer piece 72.

Next, the cushioning piece 72 is pulled up by hooking the side edges 72b and 72c of the cushioning piece 72 with the fingers, and the cushioning piece 72 is opened from the outlet 92 as shown in FIG. 1(c) with the fold line 74 as the axis of rotation. The contents 86 are exposed at the outlet 92, and the contents 86 can be removed and used.

When the remaining contents 86 are to be stored in the packaging box 10, the cushioning piece 72 is returned to the outlet 92, the insert piece 76 is folded forward along the fold line 78, and the insert piece 76 is inserted and engaged from the edge of the side surface 18 where the opening break line 58 is cut, to the back surface, and then resealed. The portion of the box body on the top lid 84 side may be left as it is, or, as shown in FIG. 3, the break line 34 may be cut, separated from the box body, and discarded.

When the packaging box 10 is no longer needed after use, it can be easily disposed of by cutting the disposal break line 60 and folding it flat.

The packaging box 10 of this embodiment has a simple structure, can cushion the contents 86, can protect the contents 86 from damage when opened, and can be resealed after opening. A single cushioning piece 72 has three functions: cushioning the contents 86, protecting the contents 86 when opened, and resealing after opening, resulting in a simple and convenient structure. The cushioning piece 72 has a simple cantilever structure, and can automatically rise from the glued piece 22 when the box-forming piece 12 is assembled to the cylinder, making assembly easy.

When the packaging box 10 of this embodiment is assembled into a rectangular cylinder in a factory or the like where the contents 86 are stored and packaged, the cushioning piece 72 folded over the backside of the glued piece 22 opens at an acute angle at the fold line 74 due to the elasticity of the box-forming piece 12, rises up from the glued piece 22, and the tip of the insertion piece 76 abuts against the backside of the side surface 14. However, the cushioning piece 72 may not rise up when folded at the fold line 74, and may pass between the cushioning piece 72 and the side surface 18 when the contents 86 are inserted. This may cause packaging defects, particularly in the case of an automatic packaging machine. To prevent this, it is recommended to ensure that the cushioning piece 72 rises up from the glued piece 22, as described below.

For example, FIG. 4 shows a modified example of the packaging box 10 of this embodiment, and like this modified example, a guide piece 81 is provided to engage the insertion piece 76 of the cushioning piece 72 with the back surface of the side surface 18. The guide piece 81 is provided at the side edge 22a of the glued piece 22, separated by a fold line 83. The guide piece 81 is shorter than the glued piece 22 in the width direction where it is connected to the glued piece 22, and the upper end 81a of the guide piece 81 is located below the fold line 74, and the lower end 81b is aligned with the lower end of the glued piece 22 on the side opposite the fold line 74. The length in the direction of connection with the glued piece 22 is approximately equal to the sum of the side surface 20 and the glued piece 22.

The guide piece 81 has a fold line 85 parallel to the side edge 22a. The distance between the fold line 83 and the fold line 85 is approximately the same as the length of the side surface 20, and the distance between the fold line 85 and the side edge 81c of the guide piece 81 opposite the fold line 85 is approximately the same as the length of the glued piece 22. A trapezoidal recess 87 is cut out in the upper end 81a adjacent to the fold line 85 on the side edge 81c side. The recess 87 is formed so that the side edge 72d of the buffer piece 72 can escape when assembling the packaging box 10. The fold line 85 side of the recess 87 is an extension of the fold line 85 and is a side edge 87a that is approximately perpendicular to the upper end 81a, and the opposite side edge 81c side is a side edge 87b that intersects with the upper end 81a at an obtuse angle. A semicircular cutout 91 is formed in the center of the lower end of the side surface 22.

The shape of the buffer piece 72 is designed so that it does not interfere with the process of assembling the buffer piece 72 into a rectangular tube while being engaged with the guide piece 81. The buffer piece 72 is a deformed trapezoid, and the tip 72a on the opposite side to the fold line 74 is formed as a straight line parallel to the fold line 74 and shorter than the fold line 74, and a pair of side edges 72d, 72e that intersect with the fold line 74 are oblique sides whose distance from each other becomes narrower as they approach the tip 72a. The side edge 72d that continues to the fold line 30 is located at an acute angle to the fold line 74 and has a shape that is cut out in a curve toward the center of the buffer piece 72. The side edge 72e that continues to the side edge 22a is a straight line that is parallel to the side edge 22a and slightly moved toward the center of the buffer piece 72, and the part that continues to the side edge 22a is formed as a curve toward the center of the buffer piece 72.

A detachable tear tag 89 is provided on side 16. The tear tag 89 contains information about the contents 86. The disposal tear line 60 is provided on side 14, not side 18. The ends of this disposal tear line 60 coincide with the fold line 38, and the center is formed in a semicircle away from the fold line 38 toward the center of side 14.

Next, a method of assembling the modified packaging box 10 of this embodiment will be described. Here, FIG. 5 shows the back side of the box-forming piece 12 of the modified packaging box 10. First, glue 89 is applied to the front surface of the guide piece 81 in two places near the lower end 81b. The fold line 83 is folded forward, and the guide piece 81 is placed on the side surface 20 and the back surface of the glued piece 22. Next, the fold line 74 is folded forward, and the cushioning piece 72 and the insertion piece 76 are placed on the front surface of the guide piece 81. Next, the fold line 28 is folded forward, and the guide piece 81 is glued to the back surface of the side surface 18 with the glue 89. Next, glue 80 is applied to the front surface of the glued piece 22, the fold line 24 is folded forward, and the back surface of the side surface 14 is glued to the glued piece 22 with the glue 80. This causes the box-forming piece 12 to be folded, and it is shipped in this folded state. In the folded state, the cushioning piece 72 is sandwiched between side 16, side 18 and guide piece 81.

Next, the process of assembling the box 10 into a rectangular cylinder in a factory or the like where the contents 86 are stored and packaged will be described with reference to FIG. 6. FIG. 6 is a plan view of the packaging box 10 as seen from the upper opening. In the folded state as shown in FIG. 6(a), the cushioning piece 72 is sandwiched between the side 16, the side 18, and the guide piece 81. When the box 10 is raised three-dimensionally as shown in FIG. 6(b), the cushioning piece 72 slides through the gap between the side 16, the side 18, and the guide piece 81 toward the side edge 81c, and passes through the fold line 85 of the guide piece 81. The fold line 85 coincides with the back side of the fold line 26, and the guide piece 81 is folded at an approximately right angle along the backs of the side surfaces 16 and 18. The guide piece 81 is glued to the lower part of the side 18 with glue 89, so it does not come off the side 18, but the upper part is not glued, so the buffer piece 72 can slide, and it guides the buffer piece 72 to slide along the back surface of the sides 16 and 18.

The side edge 72e of the buffer piece 72 is away from the fold line 83, i.e., away from the fold line 24 between the side surface 14 and the side surface 16, so that it does not interfere with the side surface 16 when it is raised three-dimensionally. When the buffer piece 72 passes through the fold line 85 and the guide piece 81 is folded 90° at the fold line 85 as shown in (b), the elasticity of the box-forming piece 12 causes it to return to the folded state shown in FIG. 6(a), but the side edge 72e of the buffer piece 72 faces the side edge 87a of the recess 87 of the guide piece 81 and is locked, preventing it from returning to its original state. Since the side edge 72d is positioned diagonally with respect to the fold line 74 and has a shape cut out in a curve toward the center, it does not interfere with the guide piece 81 when it is raised three-dimensionally, and when the guide piece 81 is folded 90° at the fold line 85, it slides smoothly while contacting the side edge 87b of the recess 87.

The buffer piece 72 is slightly longer than the length of the sides 16, 20 in the connecting direction, and the insertion piece 76 is continuously long at the tip 72a, so that when assembled, it does not open parallel to the top lid 84, but is positioned at an angle to the top lid 84. The upper end 81a of the guide piece 81 almost coincides with the position where the fold line 78 of the buffer piece 72 abuts against the side 18 due to the elasticity of the box-forming piece 12, and the insertion piece 76 is inserted between the guide piece 81 and the side 18 from the upper end 81a and is locked in place. This ensures that the inner space of the box is divided diagonally into a section close to the top lid 84 and the other section. In this state, the contents 86 are inserted from the opposite end.

According to this modified embodiment of the packaging box 10, the cushioning piece 72 can be reliably raised from the adhesive piece 22, and the inner space of the box can be reliably divided diagonally into a section close to the top lid 84 and the other section. When the contents 86 are placed in the box, they are prevented from passing between the cushioning piece 72 and the side surface 18, and defects are prevented even when using an automatic packaging device, improving work efficiency.

Next, a second embodiment of the present invention will be described with reference to Figures 7 and 8. Note that the same members as those in the above embodiment are given the same reference numerals and will not be described. The packaging box 94 in this embodiment is formed by assembling a single box-forming piece 96 made of cardboard or the like.

Figure 8 is a development view of the box-forming piece 96 as seen from the front. The box-forming piece 96 has side surfaces 14, 16, 18, and 20 that are connected in parallel to one another, and a glued piece 22 is provided on the side edge of side surface 20. Side surfaces 14, 16, 18, and 20 and glued piece 22 are separated by fold lines 24, 26, 28, and 30, respectively.

At one end of the side surface 14 perpendicular to the connecting direction with the side surface 16, an outer upper lid piece 32 is provided, separated by a fold line 33. At the end of the side surface 14 opposite the fold line 33, an outer lower lid piece 36 is provided, separated by a fold line 38. An opening fold line 98 is provided at a position close to the fold line 33 on the side surface 14. The opening fold line 98 is an axis of rotation about which the upper lid 84 moves and opens when opening, and is a straight line parallel to the fold line 33, reaching the fold line 24 and the side edge portion 14a opposite the fold line 24. The opening fold line 98 has multiple short cut lines to make it easy to bend.

A trapezoidal flap 40 is provided at the end of side 16 adjacent to fold line 33 of side 14, separated by fold line 42. A flap 44 is provided at the end of side 16 opposite fold line 42, separated by fold line 46. A tear line 100 for opening is provided at a position close to fold line 42 on side 16. The tear line 100 for opening is a straight line connecting fold line 24 and fold line 26, and is continuous with the end of fold line 98 for opening at fold line 24 and reaches a position slightly further away from fold line 42 at fold line 26, and is formed at an angle to fold line 42.

An inner upper lid piece 50 is provided at a portion of the side surface 18 adjacent to the fold line 42 of the side surface 16, separated by a fold line 52. An inner lower lid piece 54 is provided at the end of the side surface 18 opposite to 52, separated by a fold line 56. An opening break line 102 is provided at a position close to the fold line 52 on the side surface 18. The opening break line 102 is a curved line connecting the fold line 26 and the fold line 28, and is curved so that its center is away from the fold line 52. The end of the opening break line 102 located at the fold line 26 is continuous with the end of the opening break line 100. An insertion slit 104 is provided slightly below the opening break line 102, i.e., slightly away from the fold line 52. The insertion slit 104 is a short curve that follows the tear line 102 for opening, is formed to a length that does not reach the fold lines 26 and 28, and is curved in the opposite direction to the direction of the tear line 102 for opening, so that the center approaches the tear line 102 for opening. Four short cut lines are formed toward the tear line 102 on the side edge of the insertion slit 104 on the tear line 102 side to facilitate the insertion operation.

A discard break line 106 is provided on the side surface 18 near the fold line 56. The ends of the discard break line 106 are aligned with the fold line 56, and the center portion is away from the fold line 56 and is formed in a semicircle toward the center of the side surface 18.

At the end of side 20 adjacent to fold line 52 of side 18, a flap 62 is provided separated by fold line 64. At the end of side 20 opposite fold line 64, a flap 66 is provided separated by fold line 68. At a position on side 20 close to fold line 64, a tear line 108 for opening is provided, which has the same shape as tear line 100 for opening. The tear line 108 for opening is a straight line connecting fold line 28 and fold line 30, and at fold line 28 it continues to the end of tear line 102 for opening, and at fold line 30 it reaches a position slightly closer to fold line 42, and the tear line 108 for opening is formed at an angle to fold line 64.

In the portion of the glued piece 22 adjacent to the fold line 64 of the side surface 20, a cushioning piece 110 is provided, separated by a fold line 112. The cushioning piece 110 is rectangular, and the tip 110a on the opposite side to the fold line 112 is formed as a straight line parallel to the fold line 112, and a pair of side edges 110b, 110c intersecting the fold line 112 are also straight lines parallel to each other. The length between the fold line 112 and the tip 110a of the cushioning piece 110 is slightly longer than the length of the inner space of the packaging box 94 intersecting the fold line 112, that is, slightly longer than the length of the side surfaces 16, 20 in the connecting direction. When the packaging box 94 is assembled, the cushioning piece 110 closes the inner space in a cantilever state, and the fold line 112 becomes the base end supporting the cantilever state, and the tip 110a becomes the free end. An insertion piece 76 is provided at the tip 110a of the cushioning piece 110, separated by a fold line 78.

The fold line 114 for opening is provided on the glued piece 22 near the fold line 112. The fold line 114 for opening is a straight line parallel to the fold line 112, and reaches the fold line 30 and the side edge portion 22a. At the fold line 30, it is continuous with the end of the tear line 108 for opening. The fold line 114 for opening is the axis around which the top cover 84 moves and opens when opening, and is provided with multiple short cut lines to make it easy to bend.

Next, a method for assembling the packaging box 94 of this embodiment will be described. Here, Figure 8 shows the front surface of the box-forming piece 96 of the packaging box 94, and a folding method that makes the front surface of the box-forming piece 96 convex is called a forward fold, and a folding method that makes the back surface convex is called a reverse fold. The assembly method is the same as in the first embodiment, and the box is shipped in a folded state glued with glue 80. In a factory or the like that stores and packages the contents 86, the box is made into a rectangular cylinder, and one end of the cylinder is glued with glue 82 to form a top lid 84 and closed.

When assembled into a rectangular cylinder, the cushioning piece 110, which was folded over on the back side of the glued piece 22, opens at an acute angle at the fold line 112 due to the elasticity of the box-forming piece 96, rising from the glued piece 22, and the tip of the insertion piece 76 abuts against the back side of the side surface 18. The cushioning piece 110 is slightly longer than the length of the sides 16 and 20 in the connecting direction, and the insertion piece 76 is continuously long at the tip 110a, so it does not open parallel to the top cover 84, but is positioned diagonally relative to the top cover 84. In this way, the cushioning piece 110 is in a cantilever state with the fold line 112 as the base end, and diagonally divides the inner space of the box into a part close to the top cover 84 and the other part. The peripheral part of the cushioning piece 110 is approximately aligned with the opening break lines 100, 102, and the opening break line 108, or is positioned slightly below them.

In this state, the contents 86 are inserted from the opposite end. The contents 86 abut against the buffer piece 110 and do not reach the top lid 84, creating a buffer space between the top lid 84. The other end of the cylinder is then glued with glue 88 to form the bottom lid 90, which is then closed, completing the packaging as shown in FIG. 7(a). The buffer piece 110 is located between the contents 86 and the top lid 84, with the free end, tip 110a, facing the bottom lid 90. A buffer space is created between the buffer piece 110 and the top lid 84, providing a high buffer effect. The buffer piece 110 itself is also elastic and has a buffer function.

Next, a method of using the packaging box 94 of this embodiment will be described. When using the contents 86, first, the opening break line 102 on the side surface 18 is pressed and cut, and the top cover 84 side is raised, and while cutting the opening break lines 100, 108 that are continuous at both ends, the top cover 84 side is moved around the opening fold line 98 as a rotation axis to open, and the removal opening 92 is formed as shown in FIG. 7(b). The edge of the removal opening 92 opens obliquely relative to the top cover 84 because the opening break line 102 on the side surface 18 is low and the opening break lines 100, 108 are oblique and reach the opening fold line 98 on the side surface 14. When the removal opening 92 is opened, the inside of the removal opening 92 is lightly closed by the buffer piece 110 located obliquely, and the buffer piece 110 is located at a position that coincides with the opening edge of the removal opening 92 or slightly below it, covering the contents 86. Therefore, even if force is applied from the outside when cutting the tear line 102 for opening, the contents 86 are covered by the cushioning piece 110, so the deformed side 18 and fingers that break the side 18 and protrude into the internal space are prevented from interfering with the contents 86, protecting it from damage.

In addition, the portion of the glued piece 22 closer to the fold line 112 than the fold line 114 for opening is also glued to the side surface 14. Therefore, when the top cover 84 is moved around the fold line 98 for opening on the side surface 14 as a rotation axis to open the removal opening 92, the portion of the glued piece 22 closer to the fold line 112 than the fold line 114 for opening, the cushioning piece 110, and the insertion piece 76 follow the top cover 84 side and open at the same time. The contents 86 are exposed at the removal opening 92, making it easy to remove the contents 86. The tip of the insertion piece 76 protrudes from the side edge portion divided by the break line 102 for opening on the side surface 14.

When the remaining contents 86 are to be stored in the packaging box 94, the top lid 84 is returned to the removal opening 92 using the opening fold line 98 as the axis of rotation as shown in FIG. 7(c), and the insertion piece 76 protruding from the side edge of the side surface 14 is inserted into the insertion slit 104 of the side surface 18. This causes the insertion piece 76 to engage with the side surface 18 and reseal the box. Since the portion of the side surface 14 on the top lid 84 side is glued to the adhesive piece 22, it is closed at the same time as the buffer piece 110 and will not open.

When the packaging box 94 is no longer needed after use, it can be easily disposed of by cutting the disposal break line 106 and folding it flat.

The packaging box 94 of this embodiment has the same effect as the above embodiment. Furthermore, when the removal opening 92 is opened, the buffer piece 110 and the insertion piece 76 follow the top lid 84 side and open at the same time, so that the contents 86 are exposed at the removal opening 92 at the same time as the opening, making it easy to remove the contents 86. When resealing, the part on the top lid 84 side also follows the buffer piece 110 and closes at the same time, making the operation simple and convenient. When resealed, the exterior shape is a rectangular box, which is neat and easy to store.

The packaging box of this invention is not limited to the above embodiment, and the shape of each side can be changed as appropriate to match the shape of the contents. The shape of the cushioning piece can be changed as appropriate, and the length can be changed as appropriate to match the size of the contents as long as it is longer than the internal space of the packaging box. The shapes of the insertion piece, insertion slit, opening break line, etc. may be such that they can be securely engaged with each other. The shape of the disposal break line may be other than the above, or it may not be present. In addition, the cushioning piece may have a marking such as printing that allows the user to recognize that the box has been opened. This makes it possible to recognize more reliably that the box has been opened.

10, 94 Packaging box 12, 96 Box body forming piece 14, 16, 18, 20 Side surface 22 Glued piece 14a, 22a, 72b, 72c, 72d, 72e, 81c, 87a, 87b, 110b, 110c Side edge portion 48, 58, 70, 100, 102, 108 Opening break line 72, 110 Cushioning piece 72a, 110a Tip portion 74, 112 Fold line 76 Insertion piece 81 Guide piece 84 Top cover 86 Content 90 Bottom cover 98, 114 Opening fold line 104 Insertion slit

Claims (7)

The box is made of a single box-forming piece, and has a side surface assembled to the cylindrical body, a lower lid for closing the lower opening of the cylindrical body, and an upper lid for closing the upper opening of the cylindrical body.
A shock-absorbing piece is provided in the internal space of the cylinder in a cantilevered state near the upper lid to close the internal space, the shock-absorbing piece is located between the contents contained in the internal space and the upper lid, the length of the shock-absorbing piece from the base end to the tip end in the cantilevered state is longer than the width between the side surfaces of the internal space, and the free end side faces the lower lid at a predetermined height,
The side surface is provided with a tear line for opening at a position that corresponds to the height of the cushioning piece and is closed,
A packaging box characterized in that the free end of the cushioning piece is provided with an insert piece for resealing. The packaging box according to claim 1, wherein the box-forming pieces have side surfaces connected in parallel to each other, and a glued piece is provided on one end of the side surfaces in the connecting direction of the side surfaces and glued to the back surface of the side surface at the other end of the side surfaces, and the cushioning piece is provided at the end of the glued piece that intersects with the connecting direction with the side surfaces and is close to the top cover, via a fold line that serves as a rotation axis for the cushioning piece to rotate. 3. A packaging box as described in claim 2, wherein a guide piece for engaging the free end of the cushioning piece is provided on the side edge of the adhesive piece opposite the connected side surface, and the free end of the cushioning piece is engaged by the guide piece to the back surface of the side surface that faces approximately parallel to the side surface to which the adhesive piece is glued. The packaging box according to claim 2, wherein the side opposite the side having the rotating shaft has an insertion slit into which the insertion piece is inserted and locked, and the insertion piece is inserted from the insertion slit into the back surface of the side surface, where it is locked and resealed. The packaging box according to claim 2, wherein a pair of side edges of the cushioning piece that intersect with the rotation axis are cut out on the inside to provide a handhold when lifting up the cushioning piece. The packaging box according to claim 2, characterized in that there are four side surfaces, the tear line for opening is provided continuously on three of the four side surfaces, and on the remaining side surface, a fold line for opening that is a rotation axis around which the top cover moves to open is provided away from the top cover, an end of the fold line for opening is continuous with the tear line for opening, the adhesive piece is glued to the side surface having the fold line for opening, the adhesive piece has a fold line for opening that coincides with the fold line for opening, and the part of the adhesive piece on the top cover side beyond the fold line for opening is also glued to the side surface, and when the tear line for opening is cut and the top cover side is opened and closed around the fold line for opening, the cushioning piece and the insertion piece open and close following the opening and closing of the top cover side. The packaging box according to any one of claims 1 to 6, wherein the cushioning strip is marked to indicate that the box has been opened.

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