Packaging box

Abstract

To provide a packaging box that is simple in structure, has a high elastic cushioning function to receive an object regardless of the shape of the object and positively protects the object received when unsealed.SOLUTION: A packaging box, consisting of one sheet of box-body forming piece 12, comprises side surfaces 14, 16, 18, 20 assembled into a cylindrical body and lid pieces 32, 48 that close an opening at one end of the cylindrical body. The lid piece 48 comprises, on a backside, a cushioning piece 58 protruding toward an opposite end of the cylindrical body. The cushioning piece 58 has a tip 58a abutting against a backside of the side surfaces 18. In the side surfaces 18 with which the tip 58a abuts, a broken line 66 for unsealing is provided in a position closer to the lid piece 48 than a position with which the tip 58a abuts. The cushioning piece 58 comprises a support piece 120 and the support piece 120 abuts at a side edge with the side surfaces 18 facing the side surfaces 14 with which the tip 58a of the cushioning piece 58 abuts.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a packaging box for packaging an item and having an opening sealed with glue. [Background technology]

[0002] Conventionally, packaging boxes formed by assembling forming pieces of a single box body in a three-dimensional manner have been used as packaging boxes for containing, transporting, storing, etc., products, etc. Some packaging boxes have side surfaces assembled to a cylindrical body, lid pieces for closing openings at both ends of the side surfaces of the cylindrical body, and cushioning members near the lid pieces for cushioning and protecting the contents.

[0003] For example, the packaging box disclosed in Patent Document 1 is for safely housing a pump container, and is provided with side walls that serve as side walls surrounding the pump container, and one side wall is provided with a locking piece whose tip edge is locked to the protruding region of the pump container when the pump container is housed therein. The locking piece has a first valley fold line extending in a direction perpendicular to the extension direction and a second valley fold line provided on the tip side of the locking piece relative to the first valley fold line. When using this packaging box, the locking piece is mountain-folded along the base edge, and the locking piece is folded inside the side wall. Furthermore, the locking piece is valley-folded along the first valley fold line. Then, the tip edge of the locking piece is abutted against the protruding region of the pump container to house the pump container. At this time, the second valley fold line is bent, and the locking piece is housed in a state where it is locked to the protruding region of the pump container. This packaging box prevents the pump container from rattling during transportation, and furthermore, even if a load is applied to the pressing part of the pump container, the locking piece can regulate the pressing of the pressing part, thereby preventing the contents from leaking when not in use. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2016-113205 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of the above-mentioned background art, the contained object is a pump container, and the locking piece can be locked to the protruding area, but it cannot be used for other contained objects that do not have a protruding area. Also, in a sealed end carton type packaging box in which the opening on the opening side is sealed with glue, interference with the contained object when opening or automatic packaging is not taken into consideration.

[0006] The present invention has been made in consideration of the problems in the background art described above, and has an object to provide a packaging box which has a simple structure, has a high elastic cushioning function to store the contents regardless of the shape of the contents, and prevents fingers etc. from interfering with the contents when opening, thereby reliably protecting the contents. [Means for solving the problem]

[0007] The present invention is a box-forming piece that is made up of a single box-forming piece, and is provided with a side surface that is assembled to a cylindrical body and a cover piece that closes an opening at one end of the cylindrical body. A shock-absorbing piece is provided near the center of the back surface of the cover piece and protrudes toward the opposite end of the cylindrical body. The tip of the shock-absorbing piece is One of the sides The packaging box has a rear surface against which the tip portion abuts, and the side surface against which the tip portion abuts has a breaking line for opening at a position closer to the lid piece than the position at which the tip portion abuts.

[0008] The box-forming pieces are four pieces connected in parallel to each other. The above A side surface is provided, and one of the side surfaces is a portion that closes the opening of the cylinder. The aboveAn outer lid piece is provided as a lid piece, an inner lid piece is provided on the side opposite to the side on which the outer lid piece is provided and is glued to the back surface of the outer lid piece, and the other pair of sides are each provided with an upper flap that is folded over the back surface of the inner lid piece. The outer lid piece is provided with a folded back piece that is folded over and glued to its back surface, and the cushioning piece provided at the end of the folded back piece, each separated by a fold line. The length of the folded back piece in the direction in which it is connected to the outer lid piece is short, approximately half that of the outer lid piece, and the amount of protrusion of the cushioning piece is longer than that of the outer lid piece. A cutout portion of a predetermined depth is provided on the side edge along the protruding direction of the cushioning piece, and the amount of protrusion of the upper flap is shorter than the depth of the cutout portion. In the assembly process of the packaging box, the top flaps are folded so as to close the opening of the cylinder, the inner top cover piece is folded onto the surface of the pair of top flaps, and the outer top cover piece, to which the folded back piece has been folded and glued, is folded over and glued onto the surface of the inner top cover piece to form the cover piece. tube It may protrude towards the end of the body opposite the flap.

[0009] Preferably, the inner top cover piece has a protrusion protruding from each of both ends of the end opposite the side surface to which the inner top cover piece is continuous.

[0010] The side surface against which the tip portion comes into contact is provided with the buffer piece. The opposite side of the opening Close to the opening of A break line is provided for disposal. A packaging box may also be used.

[0011] A support piece is provided on the cushioning piece via a fold line, and a side edge portion of the support piece abuts against the side surface opposite to the side surface against which the tip portion of the cushioning piece abuts. Effect of the Invention

[0012] The packaging box of the present invention has a simple structure and is a sealed end carton type packaging box in which the opening on the opening side is sealed with glue, and can store contents with high elastic cushioning regardless of the shape of the contents, and can prevent fingers etc. from interfering with the contents when opening, thereby reliably protecting the contents. [Brief description of the drawings]

[0013] [Figure 1] 1A and 1B are perspective views showing an assembly process of a top cover of a packaging box according to a first embodiment of the present invention, and FIG. 1C is a perspective view showing the top cover after assembly. [Diagram 2] 1A is a perspective view showing a top lid of a packaging box of a first embodiment of the present invention, FIG. 1B is a perspective view showing the box in an opened state, and FIG. 1C is a perspective view showing the box in a resealed state. [Diagram 3] 1 is a development view of a packaging box according to a first embodiment of the present invention. FIG. [Figure 4] 1 is a vertical cross-sectional view of a packaging box according to a first embodiment of the present invention. FIG. [Diagram 5] 13A and 13B are perspective views sequentially showing an assembly process for a bottom lid of a packing box according to a second embodiment of the present invention, and FIG. 13C is a perspective view showing an upper lid after assembly. [Figure 6] FIG. 4 is a development view of a packaging box according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figs. 1 to 4 show a first embodiment of the present invention. A packaging box 10 of this embodiment is a sealed end type packaging box, and is provided by assembling box body forming pieces 12 formed by punching a blank sheet made of paper. Fig. 3 is a development view of the box body forming piece 12 seen from the front, and the box body forming piece 12 is formed by connecting side surfaces 14, 16, 18, and 20 in parallel to each other. The side surfaces 14, 16, 18, and 20 have the same length in the width direction in which they are connected, and the lengths in the connecting direction are long for the side surfaces 14 and 18 and are almost equal to each other, and slightly shorter for the side surfaces 16 and 20 and are almost equal to each other. Furthermore, a glued piece 22 is provided at the side edge of the side surface 14, which is glued to the back surface of the side surface 20 when the packaging box 10 is assembled. The glued piece 22 is connected to the side surface 14 in the width direction, which is equal to the side surface 14, and the length in the connecting direction is shorter than that of the side surface 20. The adhesive piece 22 and the sides 14, 16, 18, and 20 are separated by fold lines 24, 26, 28, and 30, respectively.

[0015] At one end of the side surface 14 in a direction perpendicular to the connecting direction of the side surfaces, a rectangular inner top cover piece 32 is provided, separated by a fold line 34. The length of the inner top cover piece 32 to the end 32a opposite the fold line 34 is short, approximately half the length in the connecting direction of the side surface 16. At both ends of the end 32a, protrusions 36 are provided, protruding from the end 32a in a direction approximately perpendicular to the end. At the end of the side surface 14 opposite the fold line 34, a trapezoidal inner bottom cover piece 37 is provided, separated by a fold line 38.

[0016] In the portion of the side surface 16 adjacent to the fold line 34 of the side surface 14, a small trapezoidal upper flap 40 is provided, separated by a fold line 42, with the end of the side surface 16 as the base. The flap 40 protrudes only slightly from the fold line 42, and is shorter than the depth to the bottom 62a of the cutout 62 of the cushioning piece 58 described later. The end 40a on the opposite side to the fold line 42 is a straight line parallel to the fold line 42 in about half of the end portion close to the fold line 26, and the remaining half close to the fold line 28 is inclined so as to approach the fold line 42 as it approaches the fold line 28. The portion of the upper flap 40 that is continuous with the fold line 28 is a short straight end portion 40b that is an extension of the fold line 28, and the end portion 40b and the end portion 40a intersect and are continuous. A trapezoidal lower flap 44 slightly larger than the upper flap 40 is provided at the end of the side surface 16 opposite the fold line 42 and separated by a fold line 46 .

[0017] A rectangular outer upper lid piece 48 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 50. The outer upper lid piece 48 is shaped to close the opening at the end when the sides 14, 16, 18, and 20 are assembled into a cylindrical body. A resealing fold line 52 is provided at a position close to the fold line 50 of the outer upper lid piece 48. The resealing fold line 52 is parallel to the fold line 50 and is provided between a pair of side edges 48a of the outer upper lid piece 48. The pair of side edges 48a of the outer upper lid piece 48, where both ends of the fold line 50 and the ends intersect, are approximately perpendicular to the fold line 50 between the fold line 50 and the resealing fold line 52, and the portion from the resealing fold line 52 to the tip is inclined so that the distance between them becomes narrower as it approaches the tip. A rectangular folded piece 54 is provided at the end of the outer top cover piece 48 opposite the fold line 50, separated by a fold line 56, and is folded back and glued to the back surface of the outer top cover piece 48. The folded piece 54 is slightly shorter than the outer top cover piece 48 in the width direction where it is connected to the outer top cover piece 48, and its length in the connecting direction is approximately half that of the outer top cover piece 48.

[0018] A cushioning piece 58 is provided at the center of the end 54a of the folded piece 54 opposite the fold line 56, separated by a fold line 60. The length of the cushioning piece 58 from the fold line 60 to the tip 58a opposite the end 54a is longer than that of the outer upper cover piece 48. That is, it is longer than the width in the direction intersecting the side surface 18 of the cylindrical body assembled by the side surfaces 14, 16, 18, and 20 in the assembled state of the packaging box 10. A pair of side edges 58b positioned at right angles to the fold line 60 are on the extension line of the side edges of the folded piece 54, and the cushioning piece 58 is formed to have the same width as the folded piece 54. A rectangular cutout portion 62 is formed in each side edge 58b adjacent to the fold line 60. The cutout 62 has a bottom 62a of a predetermined depth, and is cut out to a depth that allows the pair of protrusions 36 and the top flap 40 of the inner top cover piece 32 to be inserted when the packaging box 10 is assembled. A plurality of pressed creases 64 are formed in the cushioning piece 58 at approximately right angles to the fold creases 60, reinforcing the cushioning piece 58 so that it is difficult to bend in the protruding direction.

[0019] A tear line 66 for opening is provided on the side surface 18 in a portion adjacent to the fold line 50. The tear line 66 for opening is formed in a trapezoidal shape that bulges away from the fold line 50, and both ends of the tear line 66 for opening reach near both ends of the fold line 50. When the packaging box 10 is assembled, the tip 58a of the cushioning piece 58 abuts against the back surface of the side surface 18, but the tear line 66 for opening is provided at a position closer to the fold line 50 than the position where the tip 58a of the cushioning piece 58 abuts against the back surface. At both ends of the fold line 50, a cut line 68 for engagement is provided with a predetermined length in line with the fold line 50. The length of the cut line 68 for engagement is slightly longer than the length of the end 40b of the upper flap 40, and the end 40b of the upper flap 40 is inserted into the cut line 68 for engagement when the packaging box 10 is resealed.

[0020] An outer bottom lid piece 70 having approximately the same size as the outer top lid piece 48 is provided at the end of the side surface 18 opposite the fold line 50, separated by a fold line 72. A disposal break line 74 is provided at a portion of the side surface 18 adjacent to the fold line 72. The disposal break line 74 is formed in an arc shape that bulges out in a direction away from the fold line 72, and both ends of the disposal break line 74 reach near both ends of the fold line 72.

[0021] In the portion of the side surface 20 adjacent to the fold line 50 of the side surface 18, a small trapezoidal upper flap 76 that is symmetrical to the upper flap 40 is provided, separated by a fold line 78. The end portion 76a on the opposite side to the fold line 78 is a straight line parallel to the fold line 42 in about half close to the side edge portion 20a on the opposite side to the fold line 30, and the remaining half close to the fold line 30 is inclined so as to approach the fold line 78 as it approaches the fold line 30. The portion of the upper flap 76 that continues to the fold line 30 is a short straight end portion 76b that is an extension of the fold line 30, and the end portion 76b and the end portion 76a intersect and continue. In the end portion of the side surface 20 opposite to the fold line 78, a lower flap 80 having the same shape as the lower flap 44 is provided, separated by a fold line 82.

[0022] Next, an example of a method for assembling the packaging box 10 of this embodiment will be described. Note that Fig. 3 shows the front side of the box-body forming piece 12 of the packaging box 10, and a folding method in which the front surface of the box-body 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.

[0023] First, glue 84 is applied to the back surface of the fold-back piece 54, and the fold line 56 is folded forward. Then, the back surface of the fold-back piece 54 is glued to the back surface of the outer top cover piece 48 with the glue 84, and the cushioning piece 58 is folded over the back surface of the side surface 18. Next, glue 86 is applied to the front surface of the glued piece 22, the fold line 26 is folded forward, and then the fold line 30 is folded forward. As a result, the back surface of the side surface 20 is glued to the front surface of the glued piece 22 with the glue 86, and the folded state is achieved. In this state, the packaging box 10 folded by the box-body forming piece 12 is shipped to a factory where the contents 90, which is the product, are packaged.

[0024] After this, the contents 90 are put in and folded at 90° along the fold lines 24, 26, 28, 30 at a packaging factory to form a rectangular tube as shown in Fig. 1(a). Next, as shown in Fig. 1(b), the top flaps 40, 76 are folded at 90° along the fold lines 42, 78, the inner top cover piece 32 is folded at the fold line 34, glue 88 is applied to the surface of the inner top cover piece 32, and then the outer top cover piece 48 is folded at 90° along the fold line 50 as shown in Fig. 1(c). As a result, the back surface of the outer top cover piece 48 is glued to the surface of the inner top cover piece 32 via the fold back piece 54 with glue 88, and a top cover 89 is formed at one opening of the tube to close it.

[0025] When the outer top cover piece 48 is folded forward at 90° along the fold line 50, the cushioning piece 58, which has been folded over the back surface of the side surface 18, is separated from the back surface of the side surface 18 as the fold line 56 moves. At this time, the cutout portion 62 of the cushioning piece 58 passes through the protrusion 36 of the inner top cover piece 32, passes through the upper flaps 40, 76, and is folded backward from the fold line 60 to extend downward from the inner top cover piece 32. The length of the cushioning piece 58 in the protruding direction is longer than that of the outer top cover piece 48. That is, since the length is longer than the width in the direction intersecting the side surface 18 of the cylindrical body assembled with the sides 14, 16, 18, 20, the cushioning piece 58 is not parallel to the top cover 89, but protrudes downward at an angle relative to the top cover 89. In this way, the cushioning piece 58 is in a cantilever state with the fold line 60 as the axis of rotation, and the tip portion 58a, which is the free end, faces the opposite side to the top cover 89. The base end continuing to the fold-back piece 54 via the fold line 60 is located near the center of the top lid 89, and the tip end 58a of the cushioning piece 58 lightly abuts against the back surface of the side surface 18 due to the elasticity of the box-forming piece 12. The cushioning piece 58 diagonally divides the inner space of the box into a portion close to the top lid 89 and the other portion.

[0026] In this state, the contents 90 are inserted from the opposite end. The contents 90 are, for example, PTP sheets containing tablets bound together or wrapped in a bag. The upper end of the contents 90 abuts against the surface of the cushioning piece 58 and does not reach the top lid 89, creating a cushioning space between the top lid 89 and the cushioning piece 58. Then, the bottom flaps 44, 80 are folded forward along the fold lines 46, 82, glue 92 is applied to the surface of the inner bottom lid piece 37, the inner bottom lid piece 37 is folded forward along the fold line 38, the outer bottom lid piece 70 is folded forward along the fold line 72, the back surface of the outer bottom lid piece 70 is glued to the surface of the inner bottom lid piece 37, and the bottom lid 94 is formed at the opening of the cylinder and closed, completing the packaging as shown in FIG. 4. In the packaging box 10, the cushioning piece 58 is positioned between the contents 90 and the top lid 89, and the free end, ie, the tip 58a, faces the bottom lid 94 side. A buffer space is created between the buffer piece 58 and the upper cover 89, providing a high buffer effect. The buffer piece 58 itself is also elastic and provides a buffer function.

[0027] Next, a method of opening the packaging box 10 of this embodiment will be described. When using the contents 90, first, the tear line 66 for opening on the side surface 18 is pressed and cut. At this time, the buffer piece 58 is located between the contents 90 and the back side of the tear line 66 for opening, so that the side surface 18, which is deformed by the application of force from the outside when cutting the tear line 66 for opening, is prevented from interfering with the contents 90, and the fingers protruding into the internal space by breaking the tear line 66 for opening on the side surface 18 are also prevented from interfering, and the contents 90 are protected from being damaged. Even if the contents 90 are PTP sheets and tablets are contained in an aluminum sheet that is easily broken, the aluminum sheet will not break. In addition, even if the tear line 66 for opening is cut, the contents 90 will not fall off carelessly because it is lightly closed by the buffer piece 58. Then, the top lid 89 is pulled up, the outer top lid piece 48 opens, and the fold back piece 54 glued to the outer top lid piece 48 and the cushioning piece 58 continuous with the fold back piece 54 also open, forming an outlet 96 as shown in Fig. 2(b). The contents 90 are exposed at the outlet 96, and the contents 90 are removed and used. At this time, the trapezoidal section of the side surface 18 surrounded by the opening break line 66 and the fold line 50 becomes an engagement piece 98 for resealing, and opens in a state continuous with the outer top lid piece 48.

[0028] When the remaining contents 90 are to be stored in the packaging box 10, the top flaps 40, 76 are folded forward at 90°, the outer top cover piece 48 is folded forward at about 90° along the fold line 50, the cushioning piece 58 is inserted into the outlet 96 and returned, and the outer top cover piece 48 closes the outlet 96. Then, the locking piece 98 returns to being flush with the side surface 18. Next, the locking piece 98 and the fold line 50 are pushed toward the inside of the box body, that is, toward the side surface 14. Then, as shown in FIG. 2(c), the resealing fold line 52 is bent at an obtuse angle, the outer top cover piece 48 is bent outward, and the ends 40b, 76b of the top flaps 40, 76 on the side surface 18 side are inserted into the locking cut lines 68 formed at both ends of the fold line 50. As a result, the locking piece 98 and the outer top cover piece 48 are locked to the top flaps 40, 76, and cannot be opened upward, and the packaging box 10 is resealed.

[0029] When the packaging box 10 is no longer needed after use, it can be easily disposed of by cutting the disposal break line 74 and folding it flat.

[0030] According to the packaging box 10 of this embodiment, the package 10 has a simple structure, and can store the contents 90 with high elastic cushioning regardless of the shape of the contents, and can prevent fingers or the like from interfering with the contents 90 when opening the package, thereby reliably protecting the contents 90. A single cushioning piece 58 has two functions, namely, to cushion the contents 90 and to protect the contents 90 when opening the package, and is convenient with a simple structure. The cushioning piece 58 has a simple cantilever structure, and when the box-forming piece 12 is assembled to the cylinder, it can automatically rise from the side surface 18, making assembly easy. The simple box-forming piece 12 can simply and elastically prevent the contents 90 from wobbling in the vertical and lateral directions. The inner top cover piece 32 is provided with a protrusion 36, which can firmly support the outer top cover piece 48 and reinforce the top cover 89. In addition, it is convenient that the package can be resealed after opening.

[0031] Next, a second embodiment of the present invention will be described with reference to Figs. 5 and 6. Here, the same members as those in the above embodiment are given the same reference numerals and the description will be omitted. In this embodiment, a packaging box 100 is provided with a cushioning piece 58 in a position close to a bottom cover 94, and Fig. 5 shows the assembly process of assembling the bottom cover 94. The packaging box 100 is provided by assembling a box body forming piece 102 formed by punching a blank sheet made of paper. Fig. 6 is a development view of the box body forming piece 102 seen from the front, and the box body forming piece 102 is formed by connecting the side surfaces 14, 16, 18, and 20 in parallel to each other from the right side of the drawing. The side surfaces 14, 16, 18, and 20 have the same length in the width direction in which they are connected, and the lengths in the connecting direction of the side surfaces 14 and 18 are long and almost equal to each other, and the side surfaces 16 and 20 are slightly short and almost equal to each other. A cover piece 104 is provided on the side edge of the side 14, which is superimposed and glued onto the surface of the side 20 when the packaging box 100 is assembled. The cover piece 104 has approximately the same rectangular shape as the side 20. The cover piece 104 and the sides 14, 16, 18, and 20 are provided and separated by fold lines 24, 26, 28, and 30, respectively.

[0032] A display piece 106 is provided on a part of the covering piece 104. The display piece 106 is a rectangle slightly smaller than the covering piece 104, with one side edge 106a coinciding with the side edge 104a of the covering piece 104 opposite the fold line 24, and the other side edge 106b coinciding with the fold line 24. A pair of ends 106c, 106d intersecting with the side edges 106a, 106b are provided at approximately right angles to the fold line 24 at positions slightly away from a pair of ends of the covering piece 104 intersecting with the fold line 24. The display piece 106 is surrounded by a U-shaped zipper line 107 formed along the side edge 106b, the end 106c, and the end 106d, and is separated from the other part of the covering piece 104.

[0033] The display piece 106 has a knob 108 at a corner surrounded by the end 106d and the side edge 106a. The knob 108 is formed by slightly bulging outward from the side edge 106a, and has a fold line 110 that intersects with the corner surrounded by the end 106d and the side edge 106a so as to chamfer the corner. The knob 108 is used to hold the display piece 106 when it is cut off from the cover piece 104. Display information explaining the contents 90 is printed on the display piece 106, and the display information is formed of letters, symbols, etc.

[0034] At the end of the covering piece 104 in the direction perpendicular to the connecting direction with the side surface 14, near the end 106d of the display piece 106, a rectangular lower flap 112 is provided, separated by a fold line 114. The lower flap 112 protrudes only slightly from the fold line 114 and is shorter than the depth to the bottom 62a of the cutout portion 62 of the cushioning piece 58. At the end of the covering piece 104 opposite the fold line 114, a rectangular upper flap 116 larger than the lower flap 112 is provided, separated by a fold line 118.

[0035] In the portion of the side surface 14 adjacent to the fold line 114 of the cover piece 104, an outer bottom cover piece 148, a fold-back piece 54, and a cushioning piece 58 are provided, as in the first embodiment, separated by fold lines 150, 56, and 60, respectively. However, in the side edge portion 58c of the cushioning piece 58 located on the extension line of the fold line 26, a deformed rectangular support piece 120 is provided, separated by a fold line 122.

[0036] The support piece 120 is surrounded by an end 120a that is perpendicular to the fold line 122 and continues to the tip 58a of the cushioning piece 58, an end 120b that is parallel to the end 120a and continues to the end on the opposite side of the fold line 122, and a side edge 120c on the opposite side of the fold line 122. The end 120a is longer than the end 120b, and the side edge 120c is inclined in a direction approaching the fold line 122 as it approaches the end 120b. The length of the end 120a is approximately equal to the length of the side surface 16 in the direction in which the side surfaces are connected to each other. The angle α of the side edge 120c with respect to the fold line 122 is the angle with respect to the side surface 18 of the cushioning piece 58 when the packaging box 100 is assembled.

[0037] A discard break line 67 is provided on the side surface 14 in a portion adjacent to the fold line 150. The discard break line 67 is formed in an arc shape that bulges out in a direction away from the fold line 150, and both ends of the discard break line 67 reach near both ends of the fold line 150. When the packaging box 100 is assembled, the tip 58a of the cushioning piece 58 abuts against the back surface of the side surface 14, but the discard break line 67 is provided at a position closer to the fold line 150 than the position where the tip 58a of the cushioning piece 58 abuts against the back surface.

[0038] An outer top lid piece 170 having approximately the same size as the outer bottom lid piece 148 is provided at the end of the side surface 14 opposite the fold line 150, separated by a fold line 172. A U-shaped tear line 75 for opening is provided at a portion of the side surface 14 adjacent to the fold line 172. The tear line 75 for opening is formed in a U-shape that bulges out in a direction away from the fold line 172, and both ends of the tear line 75 for opening reach the fold line 172 and further extend away from each other along the fold line 172.

[0039] A bottom flap 124 having the same shape as bottom flap 112 is provided at a portion of side surface 16 adjacent to fold line 150 of side surface 14, separated by fold line 126. At the end opposite fold line 126, a top flap 128 having the same shape as top flap 116 is provided, separated by fold line 130.

[0040] At a portion of side surface 18 adjacent to fold line 126 of side surface 16, a trapezoidal inner bottom lid piece 132 larger than bottom flap 124 is provided, separated by fold line 134. At the end opposite fold line 134, a trapezoidal inner top lid piece 136 larger than bottom flap 128 but smaller than outer top lid piece 170 is provided, separated by fold line 138.

[0041] No other members are provided on either end of the side surface 20 in the direction perpendicular to the direction in which the side surface 20 is joined to the side surface 18 .

[0042] Next, an example of a method for assembling the packaging box 100 of this embodiment will be described. Note that Fig. 6 shows the front side of the box-body forming piece 102 of the packaging box 100, and a folding method in which the front surface of the box-body forming piece 102 is convex is called a forward folding, and a folding method in which the back surface is convex is called a reverse folding.

[0043] First, glue 84 is applied to the back surface of the fold-back piece 54, and the fold line 56 is folded forward. Then, the back surface of the fold-back piece 54 is glued to the back surface of the outer bottom cover piece 148 with the glue 84, and the cushioning piece 58 is folded over the back surface of the side surface 14. Next, glue 140 is applied to both sides of the display piece 106 on the back surface of the cover piece 104, the fold line 28 is folded forward, and then the fold line 24 is folded forward. As a result, the front surface of the side surface 20 is glued to the back surface of the cover piece 104 with the glue 140, and the box is folded. In this state, the packaging box 100 folded by the box-body forming piece 102 is shipped to a factory where the contents 90, which is the product, are packaged.

[0044] Thereafter, the contents 90 are placed inside the package, and in a packaging factory, the fold lines 24, 26, 28, and 30 are each folded at 90° to form a rectangular tube. At this time, as shown in Fig. 5(a), the support piece 120 connected to the cushioning piece 58 is folded from the fold line 122 along the back surface of the side surface 16, forming a substantially right angle with the cushioning piece 58. The corner where the side edge 120c and the end portion 120b of the support piece 120 intersect comes into contact with the fold line 28 between the side surface 16 and the side surface 18, and the cushioning piece 58 is overlapped on the back surface of the side surface 14 with no gaps.

[0045] Next, the contents 90 are inserted into the rectangular cylinder through the opening at the end. The cushioning piece 58 is maintained in a state of being stacked on the back surface of the side surface 14 by the support piece 120, so that the contents 90 can be easily inserted. It should be noted that inserting the contents 90 from the opening on the side having the cushioning piece 58 avoids the risk of problems occurring during automatic packaging, etc., because there are no obstructing members. When inserting the contents 90 from the end opposite the cushioning piece 58, there is a risk that the cushioning piece 58 may get caught between the tip 58a of the cushioning piece 58 and the side surface 14, or may block the passage through which the contents are inserted. However, the cushioning piece 58 is stacked on the back surface of the side surface 14 and is stable due to the support piece 120, so that such problems are prevented. In particular, some automatic packaging devices open each of the flaps and lid pieces before inserting the contents 90 so as not to cause any hindrance, but even if the outer upper lid piece 148 is opened and a force is applied in the direction of pulling out the cushioning piece 58, the cushioning piece 58 does not separate from the side surface 14, and problems can be prevented.

[0046] After inserting the contents 90, the top flaps 116, 128 are folded 90° along the fold lines 118, 130 at the end opposite the cushioning piece 58, the inner top cover piece 136 is folded along the fold line 138, glue 88 is applied to the surface of the inner top cover piece 136, and the outer top cover piece 170 is folded 90° along the fold line 172. As a result, the back surface of the outer top cover piece 170 is glued to the surface of the inner top cover piece 136 with the glue 88, and a top cover 89 is formed at one opening of the cylinder to close it.

[0047] 5(b), the bottom flaps 112, 124 are folded 90° along the fold lines 114, 126, the inner bottom lid piece 132 is folded along the fold line 134, glue 92 is applied to the surface of the inner bottom lid piece 132, and the outer bottom lid piece 148 is folded 90° along the fold line 150 as shown in FIG. 5(c). As a result, the back surface of the outer bottom lid piece 148 is glued to the surface of the inner bottom lid piece 132 via the folded back piece 54 with the glue 92, and a bottom lid 94 is formed and closed at one opening of the cylinder. The order of closing the top and bottom lid pieces may be other than that described above. After one of the lid pieces is closed, the contents 90 may be inserted, and then the other lid piece may be closed.

[0048] When the outer bottom lid piece 148 is folded 90° along the fold line 150, the cushioning piece 58 that was folded over the back surface of the side surface 14 moves away from the back surface of the side surface 14 as the fold line 56 moves. At this time, the cushioning piece 58 passes through the lower flaps 112, 124 from the cutout portion 62 and is folded back from the fold line 60 to extend above the inner bottom lid piece 132. The base end that continues to the folded back piece 54 via the fold line 60 is located near the center of the bottom lid 94, and the tip end 58a of the cushioning piece 58 lightly abuts against the back surface of the side surface 14 due to the elasticity of the box-forming piece 102. The support piece 120 also moves as the cushioning piece 58 moves. The angle α of the side edge 120c with respect to the fold line 122 is the angle with respect to the side surface 18 of the cushioning piece 58 when the packaging box 100 is assembled, so that the side edge 120c is parallel to the fold line 28, reducing wobbling, and the cushioning piece 58 is maintained at a predetermined angle, preventing the tip 58a from separating from the back surface of the side surface 14. This forms and closes the bottom cover 94 at the opening of the cylinder, completing the packaging.

[0049] When the contents 90 placed in the packaging box 100 are to be managed in inventory on a shelf or the like, the display piece 106 is cut off and inserted, for example, into a predetermined position on the shelf in order to display the contents of the contents 90. The method of cutting off the display piece 106 is to hook the finger on the tab 108, fold the fold line 110 to raise the tab 108, and cut the zipper line 107. After the display piece 106 is cut off, an opening is formed in the cover piece 104, but the surface of the side surface 20 is exposed to close the opening, and the contained contents 90 continues to be packaged.

[0050] When the packaging box 100 is no longer needed after use, it can be easily disposed of by cutting the disposal break line 67 and folding it flat.

[0051] The packaging box 100 of this embodiment is used in the same manner as the above embodiment, and has the same effect. In addition, since the cushioning piece 58 is provided with the support piece 120, the predetermined angle can be reliably maintained in the assembled state. Since no gap is generated between the tip 58a of the cushioning piece 58 and the side surface 14, defects such as the contents 90 entering the gap can be prevented when inserting the contents 90. In particular, even in packaging by an automatic packaging device, the cushioning piece 58 does not float and interfere with the insertion of the contents 90, and automatic packaging can be easily and reliably performed, resulting in good work efficiency. In particular, since the support piece 120 stabilizes the cushioning piece 58 at a predetermined angle, the contents 90 can be firmly held. In addition, since the display piece 106 is provided, the display piece 106 can be cut off and used for inventory management, etc. Since the support piece 120 is provided on the cushioning piece 58, it is difficult to open from the bottom lid 94 side, but the opening break line 75 is provided on the opposite side, the top lid 89 side, so that it is easy to open from the top lid 89 side and take out the contents 90.

[0052] In addition, this invention is not limited to the above embodiment, and the shape, size, number, position, etc. of the top cover piece, bottom cover piece, each flap, opening break line, disposal break line, etc. can be changed as appropriate. The number and length of the pressed lines can also be changed as appropriate. The contents can be used for various items other than the PTP sheet containing tablets. The material of the box body forming piece can be freely selected from synthetic resin, synthetic resin and paper laminate, etc., other than paper. Each fold line may be provided as a break line or the like to make it easier to fold. The resealing fold line provided in the first embodiment may be provided in the second embodiment. In addition, the cushioning piece may be added to either the opening opening or the disposal opening. [Explanation of symbols]

[0053] 10,100 Packaging boxes 12,102 Box forming piece 14,16,18,20 Side 32,132 Inner top cover piece 36 Protrusion 40,76,112,124 Upper flap 48 Outer top cover piece 52 Folding line for resealing 54 Folded piece 58 Buffer piece 58a Tip 62 Notch 66,75 Break line for opening 67,74 Disposal break wire 68 Cutting line for locking 89 Top lid 120 Support piece 120c side edge

Claims

1. The box is made of a single box-forming piece, and has a side surface assembled to the cylindrical body and a cover piece for closing an opening at one end of the cylindrical body. A shock-absorbing piece is provided on the back surface of the cover piece and protrudes toward the opposite end of the cylindrical body. The tip of the shock-absorbing piece abuts against the back surface of one of the side surfaces. A packaging box in which a break line for opening is provided on the side surface against which the tip portion abuts, at a position closer to the lid piece than the position at which the tip portion abuts, The box-forming piece has four side surfaces connected in parallel to each other, one of the side surfaces is provided with an outer upper cover piece that becomes the cover piece that closes the opening of the cylinder, the side surface facing the side surface on which the outer upper cover piece is provided is provided with an inner upper cover piece that is glued to the back surface of the outer upper cover piece, and the other pair of side surfaces are each provided with an upper flap that is folded over the back surface of the inner upper cover piece, The outer top cover piece has a fold-back piece that is folded over and glued to its back surface, and a cushioning piece that is provided at the end of the fold-back piece, each separated by a fold line, the length of the fold-back piece in the direction in which it connects to the outer top cover piece is shorter than that of the outer top cover piece, and the protruding amount of the cushioning piece is longer than that of the outer top cover piece.

2. A notch of a predetermined depth is provided on a side edge portion of the outer upper cover piece along the protruding direction of the buffer piece, and the protruding amount of the upper flap is shorter than the depth of the notch, 2. The packaging box according to claim 1, wherein the upper flap enters the notch, the cushioning piece passes through the upper flap, and protrudes toward an end of the cylindrical body opposite to the inner upper cover piece.

3. 2. The packaging box according to claim 1, wherein said inner top cover piece has a protrusion at each end opposite to said side surface to which said inner top cover piece is continuous.

4. A packaging box as described in claim 1, wherein one of the sides against which the tip of the cushioning piece abuts has a disposal break line provided near the opening opposite the opening in which the cushioning piece is provided.

5. 5. The packaging box according to claim 1, wherein a support piece is provided on the cushioning piece via a fold line, and a side edge of the support piece abuts against the side surface opposite the side surface against which the tip of the cushioning piece abuts.

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