Packaging box with cushioning function

Abstract

To provide a packaging box with cushioning function which is compact in dimension and in which four side surfaces, a bottom surface, and a partition part can be simultaneously assembled by a single action.SOLUTION: A gluing piece 22 which is continuous to a back plate 14 of four side plates and is glued to a rear surface of a right side plate 20 to form a cylindrical body is provided. An upper lid piece 32 for closing an opening end part in an assembled state and a bottom part 13 for closing a lower opening end part are provided. A partition part 72 is contained in the cylindrical body. The partition part 72 includes: a front plate partitioning surface 74 on a rear surface side of a front plate 18 with a predetermined distance; a left side plate partitioning surface 76 along a left side plate 16 on a rear surface side of the left side plate 16 with a predetermined distance; a back plate gluing surface 78 glued to a rear surface of the back plate 14; and a presser surface 80 which is continuous to the back plate gluing surface 78 and is positioned in a cantilever state so as to chamfer a corner part formed by the back plate 14 and the right side plate 20. A holding piece 92 is provided which is continuous to a lower end part of the presser surface 80 and whose surface direction is positioned along and apart from the bottom part 13 in the cantilever state to hold a bottom surface of a storage article.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a packaging box with a cushioning function, which is provided integrally with a partition section that cushions and holds the contents inside the box, and is used to package contents such as bottles. [Background technology]

[0002] Conventionally, bottled products such as lotions and medicinal liquids have been housed in paper packaging boxes for transport, storage, and display. These packaging boxes are provided with buffer dividers to protect the bottles and prevent them from rattling inside.

[0003] For example, the packaging box disclosed in Patent Document 1 has four side surfaces assembled to a cylindrical body, and a partition that cushions and holds the contents is integrally provided within the cylindrical body. A bottom is provided at the lower open end of the cylindrical body, and the bottom is assembled simultaneously with assembling the four side surfaces into a three-dimensional shape after the packaging box has been glued and folded. The partition is assembled into a three-dimensional shape after assembling the four side surfaces and the bottom into a three-dimensional shape. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-2300 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the case of the above background art, the process of assembling the four side surfaces and the bottom into a three-dimensional shape is separate from the process of assembling the partition piece into a three-dimensional shape, so the partition piece needs to be spaced a certain distance from the bottom so that it does not collide with the process of assembling the four side surfaces and the bottom into a three-dimensional shape, which poses the problem of increasing the overall dimensions.

[0006] The present invention has been made in consideration of the problems of the above-mentioned background art, and aims to provide a packaging box with a cushioning function that is compact in size and whose four sides, bottom, and partition can be assembled simultaneously with one touch. [Means for solving the problem]

[0007] The present invention is a packaging box with cushioning function, which consists of a single box-forming piece, four side surfaces consisting of a back panel, a left panel, a front panel, and a right panel assembled to a cylinder, and an adhesive piece that is continuous with the back panel located at one end in the connecting direction of the four side surfaces and is glued to the back surface of the right panel located at the other end in the connecting direction of the four side surfaces to hold the cylinder, and which is provided with a lid that closes the upper open end of the cylinder when assembled and a bottom that closes the lower open end, and which has a partition inside the cylinder that cushions and holds the contents.

[0008] The partition portion includes a front panel partition surface that runs along the back surface of the front panel with a predetermined distance between them, a left panel partition surface that runs along the back surface of the left panel with a predetermined distance between them, a back panel glued surface that is glued to the back surface of the back panel, a pressing surface that is continuous with the back panel glued surface and is positioned in a cantilevered manner so as to chamfer the corners formed by the back panel and the right panel, and a holding piece that is continuous with the lower end of the pressing surface on the bottom side, is positioned away from the bottom, and is positioned in a cantilevered manner with its surface direction along the bottom, on which the contents are placed and holds the bottom surface of the contents. The retaining piece is arranged at the lower end of the pressing surface, separated by a fold line for the retaining piece, and the length of the retaining piece from the fold line for the retaining piece to the tip on the opposite side is such that the tip reaches and engages with the front panel and the left side panel, and is positioned on the back side of the bottom with a predetermined gap between them without falling, and the retaining piece has a retaining piece fold curve that runs along the fold line for the retaining piece, and a continuous cutting line that convex toward the fold line for the retaining piece is provided along the length of the retaining piece fold curve, a pair of ends of the cutting line are continuous with the retaining piece fold curve, and the retaining piece fold curve is interrupted between the pair of ends of the cutting line, and the inner part of the cutting line protrudes toward the bottom with the retaining piece fold curve as its base end, forming a support part. The bottom is assembled at the same time as the four side surfaces are assembled into a three-dimensional shape from the state in which the box-forming pieces are glued and folded, and when the box-forming pieces are glued and folded, the retaining piece is sandwiched between the left side panel and the left side panel partition surface and between the front panel and the front panel partition surface, and a bottom cover piece forming part of the bottom is sandwiched between the retaining piece and the front panel, and the bottom cover piece has a fold line for the bottom cover piece that allows it to come into contact with the bottom cover piece and bend when the partition is assembled, and the partition has a notch that allows the bottom cover piece to pass through when the partition is assembled, so that the partition can be assembled three-dimensionally at the same time as the bottom when the four side surfaces are assembled into a three-dimensional shape (Claim 1).

[0009] The surface of the retaining piece on which the contents are placed abuts against the lower end of the corner surrounded by the left panel partition surface and the front panel partition surface, the retaining piece fold curve is bent and the cutting line is opened, the support portion rises downward from the retaining piece and protrudes toward the bottom, the lower end of the corner surrounded by the left panel partition surface and the front panel partition surface is inserted into the opening formed by the support portion rising from the retaining piece, the periphery of the opening abuts against the left panel partition surface and the front panel partition surface, and the left panel partition surface, the front panel partition surface and the retaining piece are positioned in a predetermined position (Claim 2).

[0010] The box-forming piece is arranged such that the adhesive piece, the back panel, the left panel, the front panel, and the right panel are connected in parallel to each other, and on the side edge of the adhesive piece opposite the back panel, the front panel side partition surface, the left panel partition surface, the back panel adhesive surface, and the pressing surface are connected in order and parallel to each other, and the holding piece is arranged at the lower end of the pressing surface on the bottom side along the direction of connection with the back panel adhesive surface, separated by the holding piece fold line (Claim 3).

[0011] A connecting protrusion that protrudes downward is provided at the lower end of the bottom side of the left panel partition surface, and a retaining piece that is positioned away from the bottom and positioned in a cantilevered state with its surface direction along the bottom, and on which the bottom surface of the stored item is placed to hold the bottom surface of the stored item, is provided at the tip of the connecting protrusion, separated by a fold line for the retaining piece. The length of the retaining piece from the fold line for the retaining piece to the tip on the opposite side is such that the tip reaches the pressing surface and engages, leaving a predetermined gap on the back side of the bottom, so that it does not fall. The retaining piece has a retaining piece fold curve that intersects the fold line for the retaining piece at a distance and runs along the surface direction of the pressing piece when assembled, and a continuous cutting line that convex toward the fold line for the retaining piece is provided along the length of the retaining piece fold curve, and a pair of ends of the cutting line are continuous with the retaining piece fold curve, and the retaining piece fold curve is interrupted between the pair of ends of the cutting line, and the inner part of the cutting line becomes a support part that protrudes toward the bottom, with the retaining piece fold curve as its base end. The bottom is assembled at the same time as the four side surfaces are assembled into a three-dimensional shape from the state in which the box-forming pieces are glued and folded, and the lower end of the partition and the tip of the connecting protrusion on the left panel partition surface are positioned so that the bottom cover piece that forms part of the bottom can pass through when the partition is assembled, so that the partition can be assembled three-dimensionally at the same time as the bottom when the four side surfaces are assembled into a three-dimensional shape (Claim 4).

[0012] The box-forming piece is arranged such that the adhesive piece, the back panel, the left panel, the front panel, and the right panel are connected in parallel to each other, and on the side edge of the adhesive piece opposite the back panel, the front panel side partition surface, the left panel partition surface, the back panel adhesive surface, and the pressing surface are connected in order and parallel to each other, and the connecting protrusion is provided at a position close to the back panel adhesive surface at the lower end of the left panel partition surface on the bottom side along the connection direction with the back panel adhesive surface, and the retaining piece is provided at the tip of the connecting protrusion, separated by the retaining piece fold line (Claim 5).

[0013] The area surrounded by the front panel partition surface, the left side panel partition surface, and the pressing surface forms a storage space for the item to be stored, and a bottom support portion that crosses the storage space is provided near the bottom, the surface of the bottom support portion intersects with the bottom, and the lower end portion of the bottom support portion is located near the bottom, and the bottom is assembled at the same time as the four side surfaces are assembled into a three-dimensional shape from the state in which the box-forming pieces are glued and folded, and the partition portion can be assembled three-dimensionally at the same time as the bottom when the four side surfaces are assembled into a three-dimensional shape, and the bottom support portion is provided in a position that abuts the bottom cover piece that forms part of the bottom when the partition portion is assembled, and the bottom support portion can be pressed by the bottom cover piece when the four side surfaces are assembled into a three-dimensional shape and assembled three-dimensionally (Claim 6).

[0014] The box-forming piece is provided by connecting the adhesive piece, the back panel, the left panel, the front panel, and the right panel in parallel to one another, and the adhesive piece has, on the side edge opposite to the back panel, the front panel side partition surface, the left panel partition surface, the back panel adhesive surface, and the pressing surface connected in order in parallel to one another, and a bottom support piece cut line is provided near the lower end of the bottom side of the front panel partition surface and the left panel partition surface, and one end of the bottom support piece cut line is One end of the cut line for the bottom support piece is located midway along the length of the left side panel partition surface in the direction of connection with the front panel partition surface, and a fold line for the bottom support piece is formed between the pair of ends of the cut line for the bottom support piece and the lower ends of the front panel partition surface and the left side panel partition surface, and the area between the pair of fold lines for the bottom support piece, the cut line for the bottom support piece, and the lower ends of the front panel partition surface and the left side panel partition surface forms the bottom support portion, and a corner fold line is provided in the bottom support portion between the pair of fold lines for the bottom support piece.

[0015] In an assembled state, the bottom support portion is bent from the front panel partition surface and the left side panel partition surface at the bottom support piece fold line to cross the storage space, and is assembled three-dimensionally by being bent at the corner fold line, and the corner fold line is located near the center of the storage space (Claim 7).

[0016] At the lower ends of the front panel partition surface and the left side panel partition surface, a bottom-raising partition protruding toward the bottom is provided at a position coinciding with the bottom support portion, and the bottom-raising partition is formed so that when the partition portion is assembled, it abuts against the bottom cover piece that forms part of the bottom, causing the bottom support portion to bend, and is provided in a position where it does not abut against the bottom cover piece when the partition portion is assembled (Claim 8). [Effects of the Invention]

[0017] The packaging box with cushioning function of the present invention is compact in size, has a high cushioning effect, and can be assembled with one touch even while still having the cushioning function of the four sides, bottom, and partition. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a cushioning-equipped packaging box according to a first embodiment of the present invention; [Figure 2] 1A is a plan view showing the assembled state of the cushioning-equipped packaging box of the first embodiment of the present invention, and FIG. 1B is a plan view showing the state in which an item is placed inside the box. [Figure 3] 1A is a longitudinal cross-sectional view showing the assembled state of a cushioning-equipped packaging box according to a first embodiment of the present invention, and FIG. 1B is a longitudinal cross-sectional view showing the state in which an item is placed inside the box. [Figure 4] 1 is a development view of a cushioning-equipped packaging box according to a first embodiment of the present invention. [Figure 5] 1 is a development view showing a method for assembling a packaging box with a cushioning function according to a first embodiment of the present invention. FIG. [Figure 6] 1 is a development view showing a method for assembling a packaging box with a cushioning function according to a first embodiment of the present invention. FIG. [Figure 7] 1 is a development view showing a method for assembling a packaging box with a cushioning function according to a first embodiment of the present invention. FIG. [Figure 8] 1 is a development view showing a method for assembling a packaging box with a cushioning function according to a first embodiment of the present invention. FIG. [Figure 9]1 is a development view showing a method for assembling a packaging box with a cushioning function according to a first embodiment of the present invention. FIG. [Figure 10] FIG. 10 is a perspective view of a cushioning-equipped packaging box according to a second embodiment of the present invention. [Figure 11] FIG. 10 is a plan view showing an assembled state of a cushioning-equipped packaging box according to a second embodiment of the present invention. [Figure 12] FIG. 10 is a development view of a cushioning-equipped packaging box according to a second embodiment of the present invention. [Figure 13] FIG. 10 is a development view showing a method for assembling a packaging box with a cushioning function according to a second embodiment of the present invention. [Figure 14] FIG. 10 is a development view showing a method for assembling a packaging box with a cushioning function according to a second embodiment of the present invention. [Figure 15] FIG. 10 is a development view showing a method for assembling a packaging box with a cushioning function according to a second embodiment of the present invention. [Figure 16] FIG. 10 is a plan view showing an assembled state of a cushioning-equipped packaging box according to a third embodiment of the present invention. [Figure 17] FIG. 10 is a development view of a cushioning-equipped packaging box according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figures 1 to 4 show a first embodiment of the present invention. A cushioning packaging box 10 of this embodiment is a substantially rectangular box body, and is formed by assembling box body forming pieces 12 that are integrally punched out from a single blank sheet such as cardboard.

[0020] 4 is a development view of the box-forming piece 12 as seen from the front. The box-forming piece 12 is formed by connecting a back panel 14, a left panel 16, a front panel 18, and a right panel 20, which form the four sides of the cylindrical box, in parallel with one another. The back panel 14, left panel 16, front panel 18, and right panel 20 are rectangular and of approximately the same size. An adhesive piece 22 is continuously provided on the side edge of the back panel 14, which is located at one end in the direction in which the four sides are connected, and is glued to the back surface of the right panel 20, which is located at the other end in the direction in which the four sides are connected, to hold the cylindrical body. The adhesive piece 22, the back panel 14, the left panel 16, the front panel 18, and the right panel 20 are each separated by fold lines 24, 26, 28, and 30.

[0021] At one end of the back panel 14 perpendicular to the direction in which the side faces are joined, a rectangular top cover piece 32 is provided, separated by a fold line 34, as a lid that closes the upper open end of the cylinder. At the end of the top cover piece 32 opposite to the fold line 34, an insertion piece 36 is further provided, separated by a fold line 38. At the end of the back panel 14 opposite to the fold line 34, a deformed trapezoidal bottom cover piece 40 is provided, separated by a fold line 42, as the bottom 13 that closes the lower open end, and a rectangular adhesive bottom piece 44 is provided, separated by a fold line 46, at the slanted side edge of the bottom cover piece 40 adjacent to the left side panel 16.

[0022] A trapezoidal top flap 48 is provided at the end of left panel 16 adjacent to fold line 34 of back panel 14, separated by fold line 50. A triangular bottom flap 52 is provided at the end of left panel 16 opposite fold line 50, separated by fold line 54.

[0023] An end 18a of the front panel 18 adjacent to the fold line 50 of the left side panel 16 is provided with a tear line 56 for opening that surrounds the center of the end 18a in a U-shape. The inside of the tear line 56 is an adhesive portion 57 for an insertion piece. A bottom lid piece 58 of the same shape as the bottom lid piece 40 is provided at the end of the front panel 18 opposite the end 18a, separated by a fold line 60, and a rectangular adhesive bottom piece 62 of the same shape as the adhesive bottom piece 44 is provided at the slanted side edge of the bottom lid piece 58 adjacent to the right side panel 20, separated by a fold line 64. A bottom lid piece fold line 61 that is approximately parallel to the fold line 60 is provided on the bottom lid piece 58 near the end opposite the fold line 60.

[0024] A trapezoidal top flap 66 symmetrical to top flap 48 is provided at the end of right side panel 20 adjacent to end 18a of front panel 18, separated by a fold line 68. A triangular bottom flap 70 having the same shape as bottom flap 52 is provided at the end of right side panel 20 opposite fold line 68, separated by a fold line 71.

[0025] The length of adhesive piece 22 perpendicular to fold line 24 is shorter than that of back panel 14. As for the length approximately parallel to fold line 24, the portion connecting to fold line 24 has the same width as back panel 14, and side edge 22a on the opposite side to fold line 24 is shorter than fold line 24. One upper end 22b that intersects fold line 24 is continuous with fold line 34 of back panel 14 and parallel to fold line 34. One end of the other lower end 22c is continuous with fold line 42 of back panel 14, and the other end is continuous with the lower end of side edge 22a, with about two-thirds of the portion on the back panel 14 side being an inclined straight line that moves upward relative to the extension of fold line 42 as it moves away from fold line 42, and about one-third of the portion on the side edge 22a side being a straight line approximately perpendicular to fold line 24.

[0026] A buffer partition 72 is provided adjacent to the adhesive piece 22. When the buffer-equipped packaging box 10 is assembled, the partition 72 includes a front panel partition surface 74 that runs along the back surface of the front panel 18 with a predetermined gap between them; a left panel partition surface 76 that runs along the back surface of the left panel 16 with a predetermined gap between them; a back panel glued surface 78 that is glued to the back surface of the back panel 14; and a pressing surface 80 that is continuous with the back panel glued surface 78 and cantilevers so as to chamfer the corner formed by the back panel 14 and the right panel 20. The connecting direction is parallel to the connecting direction of the four side surfaces. The adhesive piece 22, front panel partition surface 74, left panel partition surface 76, back panel glued surface 78, and pressing surface 80 are separated by fold lines 82, 84, 86, and 88, respectively.

[0027] The front panel partition surface 74 is rectangular and smaller than the front panel 18. The length in the direction of connection with the adhesive piece 22, i.e., the length intersecting the fold line 82, is smaller than that of the front panel 18 and slightly larger than that of the adhesive piece 22. Regarding the length approximately parallel to the fold line 82, the portion connecting to the fold line 82 has the same width as the adhesive piece 22, and the portion connecting to the fold line 84 on the opposite side of the fold line 82 is shorter than the fold line 82. The upper end 74b intersects with the fold line 82 and continues to the upper end 22b of the adhesive piece 22. The portion close to the fold line 82 of the upper end 74b is a straight line that coincides with an extension of the upper end 22b, while the portion close to the fold line 84 moves away from the extension of the upper end 22b and continues downward to the end of the fold line 84. The lower end 74c opposite the upper end 74b is a straight line that coincides with an extension of the lower end 22c of the adhesive piece 22.

[0028] The left side panel partition surface 76 is a deformed rectangle that is smaller than the left side panel 16, and the length in the direction of connection with the front panel partition surface 74, i.e., the length intersecting with fold line 84, is smaller than that of the left side panel 16 and also smaller than that of the front panel partition surface 74. With regard to the length approximately parallel to fold line 84, the portion connecting to fold line 84 has the same width as fold line 84, and the portion connecting to fold line 86 on the opposite side of fold line 84 is longer than fold line 84. Of the upper end portion 76b that intersects with fold line 84 and is continuous with the upper end portion 74b of the front panel partition surface 74, the portion close to fold line 84 is approximately parallel to the portion of upper end portion 74b close to fold line 82 and is located slightly downward from upper end portion 74b, and the portion close to fold line 86 is continuous with the end of fold line 86 upward. The lower end 76c opposite the upper end 76b has a straight line that coincides with the extension of the lower end 74c in the portion close to the fold line 84, and a line that is close to the fold line 86 that extends downward away from the extension of the front panel partition surface 74 and continues to the end of the fold line 86.

[0029] The length of the back panel adhesive surface 78 in the direction of connection with the left panel partition surface 76 is less than half that of the back panel 14. The length intersecting the direction of connection with the left panel partition surface 76 is a rectangle approximately equal to the fold line 86. The upper end 78b of the back panel adhesive surface 78, which is continuous with the upper end 76b, is a straight line approximately parallel to the portion of the upper end 76b close to the fold line 84. The lower end 78c opposite the upper end 78b is a straight line coinciding with an extension of the portion of the lower end 76c close to the fold line 86.

[0030] The pressing surface 80 is connected to the back panel glued surface 78 via a fold line 88, forming a cantilevered state. The pressing piece 80 is a deformed pentagon, and its length in the direction of connection to the back panel glued surface 78 is longer than that of the back panel glued surface 78, and is approximately the same length as the left panel partition surface 76. Regarding the length approximately parallel to the fold line 88, the portion connected to the fold line 88 has the same width as the back panel glued surface 78, and the side edge 80a opposite the fold line 88 is shorter than the fold line 88. An end 80b that intersects with the fold line 88 and continues to the upper end 78b of the back panel glued surface 78 is an inclined straight line that moves downward as it moves away from the fold line 88, and an end 80c opposite the end 80b is a straight line that coincides with an extension of the lower end 78c. The corner surrounded by the side edge 80a and the end 80c is beveled and provided with a notch 90 that allows the bottom cover piece 58 to pass through when the bottom part 13, which will be described later, is assembled.

[0031] A holding piece 92 for holding the bottom surface of the contained item is provided on the surface that is continuous with the lower end 80c of the pressing surface 80, is positioned away from the bottom 13, and is cantilevered along the bottom 13, and on which the bottom surface of the contained item (described later) is placed. The holding piece 92 is provided at the lower end 80c of the pressing surface 80, separated by a holding piece fold line 94.

[0032] The retaining piece 92 is rectangular, and one side edge 92a of the retaining piece 92 that intersects with the retaining piece fold line 94 is a straight line that coincides with an extension of the side edge 80a of the pressing surface 80, and the side edge 92b opposite the side edge 92a is parallel to the extension of the fold line 88 and is located slightly toward the side edge 80a, i.e., toward the side edge 92a, from the extension line. The tip 92c on the side opposite the retaining piece fold line 94 is approximately parallel to the retaining piece fold line 94, and the distance between the retaining piece fold line 94 and the tip 92c is such that, in the assembled state, the tip 92c reaches and engages with the rear surfaces of the left side panel 16 and the front panel 18, leaving a predetermined distance on the rear surface of the bottom 13, and the support portion 100 reaches the bottom, i.e., the bottom 13 and the retaining piece 92 are approximately parallel to each other. The corner surrounded by the folding line 94 for the retaining piece and the side edge 92a is beveled and has a notch 93 that allows the bottom cover piece 58 to pass through when the bottom part 13 described below is assembled.

[0033] The retaining piece 92 has a retaining piece fold curve 96 that runs along the retaining piece fold line 94 at a distance, and both ends of the retaining piece fold curve 96 reach a pair of side edges 92a, 92b of the retaining piece 92. A U-shaped cutting line 98 that convexly extends toward the retaining piece fold line 94 is provided continuously along the length of the retaining piece fold curve 96. A pair of ends 98a of the cutting line 98 continue with the retaining piece fold curve 96, and the retaining piece fold curve 96 is discontinued between the pair of ends 98a of the cutting line 98. The inner portion of the cutting line 98 forms a support portion 100 that protrudes toward the bottom 13, with the retaining piece fold curve 96 as its base end.

[0034] The distance between the fold lines 42 along which the bottoms 13 of the four side surfaces are located and the lower end 78c of the back panel adhesive surface 78 along which the lower end of the divider 72 is located is shorter than the distance between the fold line along which the bottom of a conventional packaging box is located and the fold line along which the lower end of the divider piece is located. For example, a distance of approximately 25 mm is required for a conventional packaging box, but this distance is approximately 10 mm for the cushioning packaging box 10. Even though the distance between the fold lines 42 along which the bottoms 13 of the four side surfaces are located and the lower end 78c of the back panel adhesive surface 78 along which the lower end of the divider 72 is located is narrow, the cushioning packaging box 10 makes it possible to assemble the four side surfaces into a rectangular cylinder and the bottom 13 and the divider 72 at the same time, as described below. The lower ends 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76 are located above the lower end 78c, and as will be described later, when the four sides are assembled into a rectangular cylinder, the lower ends 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76 can pass through while coming into contact with the retaining piece 92, but do not come into contact with the retaining piece 92 when assembled.

[0035] Next, an example of a method for assembling the cushioning-equipped packaging box 10 of this embodiment will be described. Here, Fig. 4 shows the front surface 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 normal folding, and a folding method in which the back surface is convex is called a reverse folding.

[0036] First, as shown in FIG. 5, fold line 86 is folded forward, and the back panel glued surface 78 is placed on the back surface of left panel partition surface 76, and the pressing surface 80 is placed on the back surface of front panel partition surface 74. Note that FIGS. 5 to 8 show the back surface of box-forming piece 12 to make the folding method easier to see. Next, glue 102 is applied to the surface of back panel glued surface 78, and fold line 82 is folded forward as shown in FIG. 6, and the surface of back panel glued surface 78 is glued to the back surface of back panel 14. Then, as shown in FIG. 7, hold-down piece fold line 94 is folded forward, and hold-down piece 92 is placed on front panel partition surface 74 and left panel partition surface 76. Next, fold lines 42, 54, 60, and 71 are folded forward, fold lines 46 and 64 are folded backward, and glue 104 and 106 are applied to the back surfaces of bottom glued pieces 44 and 62, respectively. 8, the folding line 26 is folded forward and the back surface of the bottom adhesive piece 44 is glued to the front surface of the bottom flap 52. Glue 108 is applied to the front surface of the adhesive piece 22 along the folding line 24.

[0037] Next, as shown in Figure 9, the fold line 30 is folded forward, and the adhesive piece 22 is glued to the back surface of the left side panel 20, and the bottom adhesive piece 62 is glued to the front surface of the bottom flap 70. This places the box-forming piece 12 in a folded state, and the packaging box 10, folded with the box-forming piece 12, is shipped from a factory where the contents (merchandise) are packaged. The order of gluing and folding may be different from that described above. In this state where the box-forming piece 12 is glued and folded, the retaining piece 92 is sandwiched between the left side panel 16 and the left side panel partition surface 76, and between the front panel 18 and the front panel partition surface 74, and the bottom cover piece 58, which forms part of the bottom 13, is sandwiched between the retaining piece 92 and the front panel 18.

[0038] Next, at a factory where the contents are stored and packaged, fold lines 24, 26, 28, and 30 are each folded at 90° to assemble the four sides into a three-dimensional shape, forming a rectangular tube. At this time, because bottom adhesive pieces 44 and 62 are glued to bottom flaps 52 and 70, respectively, fold lines 42, 54, 60, and 71, which were folded in half, are automatically raised and opened at approximately 90° to form bottom 13. Then, fold lines 82, 84, and 86 of divider 72 are folded at 90° and fold line 88 is folded at an obtuse angle, so that rear panel-side divider surface 74 is positioned approximately parallel to rear panel 18 with a predetermined distance between them, and right panel-side divider surface 76 is positioned approximately parallel to right panel 16 with a predetermined distance between them, as shown in FIGS. 1 to 3 .

[0039] The pressing piece 80 is connected to the back panel glued surface 78 via a fold line 88 in a cantilevered state and moves freely about the fold line 88 as an axis, but the elasticity of the box-forming piece 12 causes the fold line 88 to open at an obtuse angle, and the side edge 80a opposite the fold line 88 abuts against the back surface of the right side panel 20, sandwiching the glued piece 22 between them. As a result, the pressing piece 80 is positioned so that it is chamfered on the inside of the corner between the front panel 14 and the right side panel 20. The cylindrical space surrounded by the back panel side partition surface 74, the right side panel side partition surface 76, and the pressing piece 80 forms a storage space 110 for storing items.

[0040] In the folded state, retaining piece 92 is sandwiched between left side panel 16 and left side panel partition surface 76 and between front panel 18 and front panel partition surface 74, and bottom cover piece 58, which forms part of bottom 13, is sandwiched between retaining piece 92 and front panel 18. During the assembly process in which fold lines 24, 26, 28, and 30 are each folded 90° to form a rectangular cylinder, when fold line 84 becomes three-dimensional and forms a corner surrounded by front panel partition surface 74 and left side panel partition surface 76, retaining piece 92 is pushed out toward the bottom end of the corner, and tip 92c of retaining piece 92 reaches and engages with left side panel 16 and front panel 18, positioning it on the back side of bottom 13 with a predetermined gap between them without falling, and separating the bottom end of storage space 110 from bottom 13. In the assembled state, the retaining piece 92 abuts against the lower end of the fold line 84, which has become a three-dimensional corner, the retaining piece fold curve 96 is bent, the cutting line 98 is opened, the support part 100 rises from the retaining piece 92 and protrudes toward the bottom 13, the lower end of the fold line 84, which has become a corner, is inserted into the opening 112 formed by the support part 100 rising from the retaining piece 92, and the periphery of the opening 112 abuts against the front panel partition surface 74 and the left panel partition surface 76, so that the front panel partition surface 74, the left panel partition surface 76 and the retaining piece 92 are positioned in the predetermined positions, providing cushioning and ensuring secure positioning.

[0041] The bottom cover piece 58 is provided with a bottom cover piece fold line 61 that allows it to come into contact with the lower end 74c of the front panel partition surface 74 when the divider 72 is assembled, and is bent along the bottom cover piece fold line 61 to pass through while coming into contact with the lower end 74c of the front panel partition surface 74. The pressing surface 80 and the holding piece 92 of the divider 72 are provided with notches 90, 93 that allow the bottom cover piece 58 to pass through when the divider 72 is assembled, and when the fold lines 24, 26, 28, and 30 are each folded 90° to assemble the four side surfaces into a three-dimensional shape, the divider 72 and the bottom cover piece 58 do not come into contact with each other, and the bottom cover piece 58 is opened toward the back panel 14, allowing the bottom 13 to be assembled at the same time.

[0042] This completes the assembly of the cushioning packaging box 10 by assembling the dividers 72 into a three-dimensional shape. In this state, an item is placed inside the packaging box 10. The item is a glass vial 114 containing a medicinal liquid. The outer diameter of the vial 114 is larger than the inner diameter of the cylindrical shape of the storage space 110, which is surrounded by the front panel partition surface 74, the left panel partition surface 76, and the pressing surface 80. The vial 114 is inserted from the bottom surface 114a into the storage space 110 through the upper opening of the cushioning packaging box 10. As shown in FIG. 2(b), the front panel partition surface 74, the left panel partition surface 76, and the pressing surface 80 are pushed out by the side surface 114b of the vial 114, elastically deforming, and the central portion is pushed out. The retaining piece 92 is pressed down against the bottom surface 114a of the vial 114, causing the retaining piece fold line 96 to be folded at an obtuse angle, and the retaining piece fold line 94 to be folded at a 90° angle, so that the portion of the retaining piece 92 between the retaining piece fold line 96 and the retaining piece fold line 94 is approximately parallel to the bottom 13, and the portion between the retaining piece fold line 96 and the tip 92c is supported as if it were standing up along the back surfaces of the left side panel 16 and the front panel 18. The retaining piece fold line 96 is folded at an obtuse angle, and the retaining piece 92 is elastically deformed and bent, thereby assisting cushioning.

[0043] Next, the top flaps 48, 66 are folded squarely along the fold lines 50, 68, and then the top cover piece 32 is folded squarely along the fold line 34. Then, the fold line 38 is folded squarely again, and the insert piece 36 is inserted inside the back panel 18, and the box is closed, completing the packaging. The adhesive portion 57 for the insert piece on the front panel 18 may be glued to the insert piece 36. When opening the cushioning packaging box 10, the adhesive portion 57 for the insert piece is pressed to cut the break line 56 as shown in FIG. 1.

[0044] The cushioning-equipped packaging box 10 of this embodiment is compact in size, and the four side surfaces, bottom 13, and divider 72 can be assembled simultaneously from the folded state with a single touch. During assembly, the bottom lid piece 58 is folded along the bottom lid piece fold line 61 and passes through while contacting the divider 72, and the divider 72 and bottom lid piece 58 do not come into contact due to the cutouts 90 and 93 provided in the divider 72. The divider 72 can be assembled three-dimensionally simultaneously with the bottom 13 when the four side surfaces are assembled into a three-dimensional shape by folding the fold lines 24, 26, 28, and 30 at 90 degrees each. One-touch assembly from the folded state allows for easy packaging. In the folded state, the retaining piece 92 is sandwiched between the left panel 16 and the left panel partition surface 76 and between the front panel 18 and the front panel partition surface 74, and during the assembly process, the retaining piece 92 is pushed outward toward the lower end of the corner of the fold line 84, allowing automatic assembly. The bottom cover piece 58, which forms part of the bottom 13, is sandwiched between the retaining piece 92 and the front panel 18, and during the assembly process, the bottom cover piece 58 passes through the notches 90, 93 of the partition surface 72 and opens toward the back panel 14, simultaneously forming the bottom 13.

[0045] The distance between the fold line 42 where the bottoms 13 of the four sides are located and the lower end 78c of the adhesive surface 78 of the back panel where the lower end of the divider 72 is located can be shortened, and even if the distance is short, it can be assembled with one touch from the folded state. The divider 72 and the bottom 13 are spaced apart, providing sufficient cushioning function, and the height of the four sides can be reduced, allowing for compact dimensions.

[0046] Retaining piece fold line 96 is bent, cutting line 98 is opened, and support portion 100 rises from retaining piece 92 and protrudes toward bottom 13, preventing retaining piece 92 from dropping too far downward. The lower end of fold line 84, which has become a corner, is inserted into opening 112 formed by support portion 100 rising from the retaining piece, and the peripheral edges of opening 112 abut against front panel partition surface 74 and left panel partition surface 76, so that front panel partition surface 74, left panel partition surface 76, and retaining piece 92 are positioned in predetermined positions, providing high cushioning and ensuring reliable positioning.

[0047] Next, a second embodiment of the present invention will be described with reference to Figures 10 to 12. Here, the same components as those in the above embodiment are designated by the same reference numerals, and the description thereof will be omitted. The cushioning-equipped packaging box 120 of this embodiment is a substantially rectangular box, and is formed by assembling box-forming pieces 122 that are integrally punched out from a single blank sheet such as cardboard.

[0048] Figure 12 is an exploded view of the box-forming piece 122 as seen from the front. The back panel 14, left panel 16, front panel 18, and right panel 20, which form the four sides of the cylindrical box body, are formed parallel to each other and connected together, and an adhesive piece 22 is provided on the side edge of the back panel 14, and each is separated by fold lines 24, 26, 28, and 30.

[0049] At one end of the back panel 14, a rectangular top cover piece 32 is provided, separated by a fold line 34, as a lid portion that closes the upper open end of the cylinder, and at the end of the top cover piece 32 opposite the fold line 34, an insertion piece 36 is further provided, separated by a fold line 38. At the end of the back panel 14 opposite the fold line 34, a bottom flap 52 is provided, separated by a fold line 54.

[0050] An upper flap 48 is provided at the end of left panel 16 adjacent to fold line 34 of back panel 14, separated by fold line 50. A deformed trapezoidal bottom cover piece 40, which becomes bottom 13 that closes the lower open end, is provided at the end of left panel 16 opposite fold line 50, separated by fold line 42, and a bottom adhesive piece 44 is provided at the inclined side edge of bottom cover piece 40 adjacent to back panel 14, separated by fold line 46.

[0051] A break line 56 is provided at end 18a of front panel 18 adjacent to fold line 50 of left side panel 16, and the inside of break line 56 becomes an adhesive portion 57 for an insertion piece. A bottom flap 70 is provided at the end opposite end 18a of front panel 18, separated by a fold line 71.

[0052] An upper flap 66 is provided at the end of the right side panel 20 adjacent to the end 18a of the front panel 18, separated by a fold line 68. A deformed trapezoidal bottom cover piece 58 is provided at the end opposite to the fold line 68, separated by a fold line 60, and a bottom adhesive piece 62 is provided at the inclined side edge of the bottom cover piece 58 adjacent to the front panel 18, separated by a fold line 64.

[0053] A buffer partition 72 is provided adjacent to the adhesive piece 22. The partition 72 is formed by connecting a front panel partition surface 74, a left panel partition surface 76, a back panel adhesive surface 78, and a pressing surface 80 to the adhesive piece 22 in this order.

[0054] The left side panel partition surface 76 is a deformed rectangle smaller than the left side panel 16, and its length in the direction of connection with the front panel partition surface 74, i.e., the length intersecting the fold line 84, is shorter than that of the left side panel 16 and approximately the same as that of the front panel partition surface 74. Regarding the length approximately parallel to the fold line 84, the portion connecting to the fold line 84 has the same width as the fold line 84, while the portion connecting to the fold line 86 on the opposite side of the fold line 84 is longer than the fold line 84. The upper end 76b intersects the fold line 84 and continues to the upper end 74b of the front panel partition surface 74. The portion close to the fold line 84 of the upper end 76b is approximately parallel to the portion of the upper end 74b close to the fold line 82, and is located slightly downward relative to the upper end 74b. The lower end 76c opposite the upper end 76b has approximately half of its length, closest to the fold line 84, formed as a quarter-circular arc that is concave toward the center of the left side panel partition surface 76. Approximately half of the area closest to fold line 86 is a connecting protrusion 124, and tip 124a of connecting protrusion 124 is a straight line that is approximately perpendicular to fold lines 84, 86, and is located below the lower end of fold line 84 and slightly below the lower end of fold line 86, which is located below the lower end of fold line 84. The corner of connecting protrusion 124 surrounded by tip 124a and fold line 86 is beveled obliquely.

[0055] A retaining piece 126 is provided, separated by a retaining piece fold line 128, and is continuous with a tip end 124a of a connecting protrusion 124 of the left side panel partition surface 76, positioned in a cantilevered manner with a spaced apart surface to the bottom 13, and overlapped with the bottom surface 114a of the vial 114 to hold the bottom surface 114a of the vial 114. The retaining piece 126 is rectangular, and an end 126a opposite the retaining piece fold line 128 is approximately parallel to the retaining piece fold line 128. One side edge 126b that intersects with the retaining piece fold line 128 is located on an extension of the fold line 84, and an L-shaped notch 129 is cut out at the corner of the side edge 126b and the retaining piece fold line 128, and the corner is continuous with the lower end 76c. Notch 129 communicates with lower end 76c of left side panel partition surface 76 when box-forming piece 122 is in a folded state, allowing bottom flap 70 and bottom cover piece 40 to pass through when bottom 13 is assembled. The other side edge 126c that intersects with retaining piece fold line 128 is located closer to the center of retaining piece 126 than the extension of fold line 86, with one end continuing to the lower end of retaining piece fold line 128 and the other end being located closer to side edge 126b than retaining piece fold line 128 and also located outside the straight portion of tip 126a, forming tip 130 which is a semicircular protrusion that is continuous with tip 126a.

[0056] The distance between the folding line 128 for the holding piece and the tip 130 of the holding piece 126 is such that, in the assembled state, the tip 130 reaches the pressing surface 80 and is locked, and is positioned at a predetermined distance on the back side of the bottom 13 without falling.

[0057] The retaining piece 126 has a retaining piece fold line 132 that intersects the retaining piece fold line 128 at a distance and runs along the surface direction of the pressing surface 80 in the assembled state. The retaining piece fold line 132 is positioned so that the corner surrounded by the side edge 126c and the end 126a passes through the base end of the tip 130 and is chamfered. Both ends of the retaining piece fold line 132 reach the end 126a and the side edge 126c of the retaining piece 126. A U-shaped cutting line 98 that convexly extends toward the retaining piece fold line 128 is continuously provided along the length of the retaining piece fold line 132. A pair of ends 98a of the cutting line 98 are continuous with the retaining piece fold line 132, and the retaining piece fold line 132 is discontinued between the pair of ends 98a of the cutting line 98. The inner portion of the cutting line 98 forms a support portion 100 that protrudes toward and contacts the bottom portion 13, with the retaining piece fold line 132 as its base end.

[0058] The distance between the fold lines 54 along which the bottoms 13 of the four side surfaces are located and the tip ends 124a of the connecting protrusions 124 along which the lower ends of the dividers 72 are located is shorter than the distance between the fold line along which the bottoms of the packaging boxes of the prior art are located and the fold line along which the lower ends of the dividers are located. For example, while the packaging boxes of the prior art require a distance of about 25 mm, the packaging box with cushioning 120 requires a distance of 10 mm. Even though the distance between the fold lines 54 along which the bottoms 13 of the four side surfaces are located and the tip ends 124a of the connecting protrusions 124 along which the lower ends of the dividers 72 are located is narrow, the packaging box with cushioning 120 makes it possible to assemble the four side surfaces into a rectangular cylinder and the bottoms 13 and the dividers 72 at the same time, as will be described later.

[0059] In the folded state, the lower ends 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76 do not come into contact with the bottom flap 70 and bottom cover piece 58 that form part of the bottom 13, and therefore when assembling the four side surfaces into a rectangular cylindrical body, the front panel partition surface 74 and the left panel partition surface 76 do not come into contact with the bottom flap 70 and bottom cover piece 58. For this reason, the partition 72 can be assembled three-dimensionally at the same time as the bottom when assembling the four side surfaces into a three-dimensional shape. Tip 124a of connecting protrusion 124 is located below lower ends 74c, 76c of front panel partition surface 74 and left panel partition surface 76, but is located near rear panel glued surface 78, and a notch 129 is provided in the part of retaining piece 126 that continues to lower end 76c of left panel partition surface 76, so that bottom flap 52 is located in a position that allows it to pass through while still contacting connecting protrusion 124, and does not interfere with assembly. Furthermore, retaining piece 126 is folded into the gap between left panel partition surface 76 and rear panel glued surface 78, that is, into the gap that becomes storage space 110 when assembled three-dimensionally, so it does not interfere with assembling bottom 13 and partition 72 into a rectangular cylindrical body.

[0060] Next, an example of a method for assembling the cushioning-equipped packaging box 120 of this embodiment will be described. First, as shown in Fig. 13, the fold line 128 for the retaining piece is folded forward, and the retaining piece 126 is placed on the back surface of the left panel partition surface 76. Next, as shown in Fig. 14, the fold line 86 is folded forward, and the back panel adhesive surface 78 and the pressing surface 80 are placed on the back surfaces of the front panel partition surface 74 and the left panel partition surface 76, sandwiching the retaining piece 126 therebetween, and glue 102 is applied to the surface of the back panel adhesive surface 78. Then, as shown in Fig. 15, the fold line 82 is folded forward, and the surface of the back panel adhesive surface 78 is glued to the back surface of the back panel 14. Next, the fold lines 42, 54, 60, and 71 are folded forward, and the fold lines 46 and 64 are folded backward, and glue 104 and 106 are applied to the back surfaces of the bottom adhesive pieces 44 and 62, respectively. As with the cushioning packaging box 10 of the first embodiment, the fold line 26 is folded squarely, and the back surface of the bottom adhesive piece 44 is glued to the surface of the bottom flap 52. Glue 108 is applied to the surface of the adhesive piece 22 along the fold line 24. The fold line 30 is folded squarely, and the adhesive piece 22 is glued to the back surface of the left side panel 20, and the bottom adhesive piece 62 is glued to the surface of the bottom flap 70. This places the box-body forming piece 122 in a folded state, and the cushioning packaging box 120 folded with the box-body forming piece 122 in this state is shipped from a factory where vials 114 are packaged.

[0061] Next, at a factory that stores and packages vials 114, fold lines 24, 26, 28, and 30 are each folded at 90 degrees to form a rectangular tube. At this time, bottom 13 is automatically formed. Divider 72 is then folded at 90 degrees along fold lines 82, 84, and 86, and fold line 88 is folded at an obtuse angle along fold lines 82, 84, and 86, so that rear panel-side partition surface 74 is positioned substantially parallel to rear panel 18 and spaced a predetermined distance from the rear surface of rear panel 18, and right panel-side partition surface 76 is positioned substantially parallel to right panel 16 and spaced a predetermined distance from the rear surface of right panel 16, as shown in FIGS.

[0062] In the folded state, the lower ends 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76 do not contact the bottom flap 70 and bottom cover piece 58 that form part of the bottom 13, and therefore the front panel partition surface 74 and the left panel partition surface 76 do not contact the bottom flap 70 and bottom cover piece 58 when the four side surfaces are assembled into a rectangular cylindrical body. The tip 124a of the connecting protrusion 124 is located below the lower ends 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76, but is located in a portion close to the back panel adhesive surface 78, and the tip 124a of the holding piece 126 is located below the lower end 76c of the left panel partition surface 76. A notch 129 is provided in the portion continuous with the lower end 76c of the left panel partition surface 76, allowing the bottom flap 52 to pass through while still contacting the connecting protrusion 124. Furthermore, because the retaining piece 126 is folded into the gap between the left side panel partition surface 76 and the back panel adhesive surface 78, that is, into the space that becomes the storage space 110 when assembled three-dimensionally, it does not interfere with the assembly of the bottom 13 and the partition 72 into a rectangular cylindrical body. Therefore, when the four side surfaces are assembled into a three-dimensional shape, the partition 72 is assembled three-dimensionally at the same time as the bottom, completing the assembly of the packaging box with cushioning function 120.

[0063] The pressing surface 80 and the holding piece 126 are in a cantilevered state and can move freely about the fold line 88 or the holding piece fold line 128, but the elasticity of the box-forming piece 122 causes the fold line 88 and the holding piece fold line 128 to open at an obtuse angle, and the storage space 110 is assembled with a single touch. In this state, when the vial 114 is placed in the storage space 110, the holding piece 126 is pressed down against the bottom surface 114a of the vial 114, and the tip 130 is pressed against the pressing surface 80. Because the holding piece fold line 132 is formed so as to follow the surface direction of the pressing surface 80 in the assembled state, the holding piece fold line 132 is folded at an obtuse angle. The retaining piece fold line 128 is folded forward at 90°, the portion of the retaining piece 126 between the retaining piece fold line 128 and the retaining piece fold curve 132 is approximately parallel to the bottom 13, and the portion between the retaining piece fold curve 132 and the tip 130 is supported as if standing up along the back surface of the pressing surface 80. The retaining piece fold curve 132 is folded at an obtuse angle, and the retaining piece 126 is elastically deformed and bent, thereby assisting cushioning properties.

[0064] As with the cushioning packaging box 10 of the first embodiment, the top flaps 48, 66 are folded forward along the fold lines 50, 68, then the top cover piece 32 is folded forward along the fold line 34, and then the fold line 38 is folded forward again to insert the insert piece 36 into the inside of the back panel 18, and the box is closed, completing the packaging. The adhesive portion 57 for the insert piece on the front panel 18 may be glued to the insert piece 36. To open the cushioning packaging box 10, the adhesive portion 57 for the insert piece is pressed to cut the break line 56 as shown in FIG. 10.

[0065] The cushioning packing box 120 of this embodiment has the same effects as the above-described embodiment. Furthermore, the holding pieces 126 are positioned in the gaps that form the storage spaces 110, and can be assembled with a weak force.

[0066] Next, a third embodiment of the present invention will be described with reference to Figures 16 and 17. Here, the same components as those in the above-described embodiment are designated by the same reference numerals, and the description thereof will be omitted. The cushioning-equipped packaging box 134 of this embodiment is a substantially rectangular box, and is formed by assembling box-forming pieces 136 that are integrally punched out of a single blank sheet such as cardboard.

[0067] A cut line 138 for the bottom support piece is provided near the lower end portions 74c, 76c on the bottom 13 side of the front panel partition surface 74 and the left panel partition surface 76, one end of the cut line 138 for the bottom support piece is located midway along the length of the front panel partition surface 74 in the direction of connection with the left panel partition surface 76, and the other end is located midway along the length of the left panel partition surface 76 in the direction of connection with the front panel partition surface 74, and a fold line 140 for the bottom support piece is formed between the pair of ends of the cut line 138 for the bottom support piece and the lower end portions 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76. A bottom support section 142 is formed between the pair of bottom support piece fold lines 140, the bottom support piece cut lines 138, and the lower end portions 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76. A corner fold line 144 is provided in the bottom support section 142 between the pair of bottom support piece fold lines 140, and the corner fold line 144 is located closer to the front panel partition surface 74 than the extension of the fold line 84. A bottom-raising partition 146 that protrudes toward the bottom 13 is provided at a position that coincides with the bottom support section 142 at the lower end portions 74c, 76c of the front panel partition surface 74 and the left panel partition surface 76. The bottom-raising partition 146 is located between the bottom support piece fold line 140 on the left panel partition surface 76 side and the corner fold line 144.

[0068] The bottom 13 is assembled at the same time as the four side surfaces are assembled into a three-dimensional shape from the state in which the box-forming piece 136 is glued and folded. The partition 72 can be assembled three-dimensionally at the same time as the bottom 13 when the four side surfaces are assembled into a three-dimensional shape, and the bottom-raising partition 146 of the bottom support part 142 is positioned so that it bends the corner fold line 144 while abutting against the bottom cover piece 40 that forms part of the bottom 13 when the partition 72 is assembled.

[0069] Next, an example of a method for assembling the cushioning-equipped packaging box 134 of this embodiment will be described. First, fold line 86 is folded forward, glue 102 is applied to the adhesive surface 78 of the back panel, fold line 82 is folded forward, and the surface of the adhesive surface 78 of the back panel is glued to the back surface of the back panel 14. Next, fold lines 42, 54, 60, and 71 are folded forward, fold lines 46 and 64 are folded backward, and glue 104 and 106 are applied to the back surfaces of the bottom adhesive pieces 44 and 62, respectively. Next, fold line 26 is folded forward, and the back surface of bottom adhesive piece 44 is glued to the surface of bottom flap 52. Then, glue 108 is applied to the surface of adhesive piece 22 along fold line 24. fold line 30 is folded forward, and adhesive piece 22 is glued to the back surface of left side panel 20, and bottom adhesive piece 62 is glued to the surface of bottom flap 70, respectively. As a result, the box-forming piece 136 is in a folded state.

[0070] Next, at a factory where the vials 114 are stored and packaged, the fold lines 24, 26, 28, and 30 are each folded 90 degrees to form a rectangular cylinder. At this time, the bottom 13 is automatically formed. The partition 72 forms a storage space 110 surrounded by the front panel partition surface 74, the left side panel partition surface 76, the back panel glued surface 78, and the pressing surface 80.

[0071] In the assembled state, the bottom support portion 142 is bent from the front panel partition surface 74 and the left side panel partition surface 76 along bottom support piece fold lines 140 to cross the storage space 110, and then folded along corner fold lines 144 to form a three-dimensional assembly. As shown in FIG. 16 , the corner fold lines 144 are bent at positions close to the center of the storage space 110, and when the four sides are assembled into a three-dimensional shape, the bottom cover piece 40 abuts against the bottom-raising partition 146 of the bottom support portion 142, and the bottom support portion 142 is pushed by the bottom cover piece 40 into the storage space 110, resulting in a three-dimensional assembly.

[0072] The cushioning packaging box 134 of this embodiment has the same effects as the above-described embodiment. Furthermore, with its simple structure, the bottom support part 142 can be reliably pressed by the bottom lid piece 40 and assembled three-dimensionally with a single touch. The vial 114 is supported on the upper end of the bottom support part 142 and is reliably housed with high cushioning properties. The bottom-raising partition 146, like the support part 100, protrudes toward the bottom part 13, preventing the bottom support part 142 from dropping too far downward.

[0073] The cushioning packaging box of this invention is not limited to the above embodiment. The size and shape of the cylindrical body formed by the four side surfaces can be modified to suit the contents. The shapes and sizes of the top cover piece and top flap that close the upper opening of the box, the rear panel partition surface, the right panel partition surface, the retaining piece, and the bottom partition surface can also be modified as needed, and may be other than those described above. The arrangement order of the four side surfaces of the box-forming pieces can be modified as needed. Partition surfaces and retaining pieces may be provided on the inside of any of the four sides (front panel, right panel, rear panel, and left panel). The bottom support portion may be provided on a surface other than the front panel partition surface or the left panel partition surface. Various contents other than vials can be contained. The material of the box-forming pieces can be freely selected, such as cardboard, synthetic resin, or a laminate of synthetic resin and paper. The number and length of the fold lines and cutting lines can also be modified as needed, and the fold lines may be provided with break lines or the like to make them easier to fold. [Explanation of symbols]

[0074] 10,120,134 Packaging box with buffer function 12,122,136 Box forming piece 13 Bottom 14 Back plate 16 Left side plate 18 Front plate 20 Right side plate 22 Glued piece 32 Top cover piece 58,40 Bottom cover piece 61 Folding line for bottom cover piece 72 Partition 74 Front panel partition surface 76 Left side panel partition 74c,76c Lower end 78 Back plate adhesive side 80 Pressing surface 80c bottom end 90,93 Notch 92,126 Holding piece 92c tip 94,128 Folding line for holding piece 96,132 Holding single fold curve 98 Cutting line 98a End 100 Support part 110 Containment Space 112 Opening 114 vials 124 Connecting protrusion 124a Tip 130 Tip 138 Cut line for bottom support piece 142 Bottom support part 140 Folding line for bottom support piece 144 Corner fold curve 146 Raised bottom partition

Claims

1. A packaging box with a cushioning function, which is made up of one box-forming piece, has four side surfaces consisting of a back panel, a left panel, a front panel, and a right panel assembled to a cylinder, and an adhesive piece that is continuous with the back panel located at one end in the connecting direction of the four side surfaces and is glued to the back surface of the right panel located at the other end in the connecting direction of the four side surfaces to hold the cylinder, and is provided with a lid that closes the upper open end of the cylinder when assembled, and a bottom that closes the lower open end, and the cylinder has a partition within it that cushions and holds the contents, The partition section has a front panel partition surface that runs along the back surface of the front panel at a predetermined interval, a left panel partition surface that runs along the back surface of the left panel at a predetermined interval, a back panel glued surface that is glued to the back surface of the back panel, a pressing surface that is continuous with the back panel glued surface and is positioned in a cantilevered manner so as to chamfer the corner formed by the back panel and the right panel, and a holding piece that is continuous with the lower end of the bottom side of the pressing surface and is positioned away from the bottom and is positioned in a cantilevered manner with its surface direction along the bottom, on which the contents are placed and which holds the bottom surface of the contents, The retaining piece is provided at the lower end of the pressing surface, separated by a fold line for the retaining piece, and the length from the fold line for the retaining piece to the tip of the retaining piece on the opposite side is such that the tip reaches and engages with the front panel and the left side panel, and is positioned at a predetermined interval on the back side of the bottom without falling; the retaining piece has a retaining piece fold curve that is spaced apart from and along the fold line for the retaining piece, and a cutting line that is convex toward the fold line for the retaining piece is continuously provided along the length of the retaining piece fold curve, a pair of ends of the cutting line are continuous with the retaining piece fold curve, and the retaining piece fold curve is interrupted between the pair of ends of the cutting line, and the inner part of the cutting line has the retaining piece fold curve as a base end and protrudes toward the bottom to form a support part; The bottom portion is assembled at the same time as assembling the four side surfaces into a three-dimensional shape from a state in which the box-forming pieces are glued and folded, When the box-forming piece is glued and folded, the holding piece is sandwiched between the left side panel and the left side panel partition surface and between the front panel and the front panel partition surface, and a bottom cover piece forming a part of the bottom is sandwiched between the holding piece and the front panel, The bottom lid piece is provided with a fold line for the bottom lid piece that contacts the bottom lid piece and is bent when the partition part is assembled, and the partition part can be assembled three-dimensionally at the same time as the bottom part when the four side surfaces are assembled into a three-dimensional shape.

2. 2. The packaging box with cushioning function according to claim 1, wherein the surface of the retaining piece on which the contents are placed abuts against the lower end of the corner surrounded by the left panel partition surface and the front panel partition surface, the retaining piece fold curve is bent to open the cutting line, the support portion rises downward from the retaining piece and protrudes toward the bottom, the lower end of the corner surrounded by the left panel partition surface and the front panel partition surface is inserted into the opening formed by the support portion rising from the retaining piece, the periphery of the opening abuts against the left panel partition surface and the front panel partition surface, and the left panel partition surface, the front panel partition surface, and the retaining piece are positioned in predetermined positions.

3. The box-forming piece is provided by connecting the adhesive piece, the rear panel, the left panel, the front panel, and the right panel in parallel to one another, and the front panel side partition surface, the left panel partition surface, the rear panel adhesive surface, and the pressing surface are connected in order and parallel to one another on the side edge of the adhesive piece opposite the rear panel, 2. A packaging box with cushioning function as described in claim 1, wherein the holding piece is provided at the lower end of the bottom side of the pressing surface along the connecting direction with the back panel adhesive surface, separated by a fold line for the holding piece.

4. A packaging box with a cushioning function, which is made up of one box-forming piece, has four side surfaces consisting of a back panel, a left panel, a front panel, and a right panel assembled to a cylinder, and an adhesive piece that is continuous with the back panel located at one end in the connecting direction of the four side surfaces and is glued to the back surface of the right panel located at the other end in the connecting direction of the four side surfaces to hold the cylinder, and is provided with a lid that closes the upper open end of the cylinder when assembled, and a bottom that closes the lower open end, and the cylinder has a partition within it that cushions and holds the contents, The partitioning portion is provided with a front panel partitioning surface that is spaced apart from the rear surface of the front panel and follows the front panel, a left panel partitioning surface that is spaced apart from the rear surface of the left panel and follows the left panel, a rear panel glued surface that is glued to the rear surface of the rear panel, and a pressing surface that is continuous with the rear panel glued surface and is positioned in a cantilevered state so as to chamfer a corner formed by the rear panel and the right panel, A connecting protrusion protruding downward is provided at the lower end of the bottom side of the left side panel partition surface, and a retaining piece is provided at the tip of the connecting protrusion, which is located away from the bottom and positioned in a cantilevered state with its surface direction along the bottom, and on which the contents are placed and which holds the bottom surface of the contents, separated by a retaining piece fold line. The length of the retaining piece from the retaining piece fold line to the tip on the opposite side is such that the tip reaches the pressing surface and is engaged, and is positioned at a predetermined interval on the back side of the bottom without falling. The retaining piece has a retaining piece fold curve that intersects the retaining piece fold line at a distance and runs along the surface direction of the pressing surface in an assembled state, and a cutting line that is convex toward the retaining piece fold line is provided continuously along the length of the retaining piece fold curve, and a pair of ends of the cutting line are continuous with the retaining piece fold curve, and the retaining piece fold curve is interrupted between the pair of ends of the cutting line, and the inner part of the cutting line becomes a support part that protrudes toward the bottom with the retaining piece fold curve as its base end. The bottom is assembled at the same time as the four side surfaces are assembled into a three-dimensional shape from the state in which the box-body forming pieces are glued and folded, and the lower end of the partition and the tip of the connecting protrusion on the left side panel partition surface are positioned so that the bottom cover piece that forms part of the bottom can pass through when the partition is assembled, so that the partition can be assembled three-dimensionally at the same time as the bottom when the four side surfaces are assembled into a three-dimensional shape.

5. The box-forming piece is provided by connecting the adhesive piece, the rear panel, the left panel, the front panel, and the right panel in parallel to one another, and the front panel side partition surface, the left panel partition surface, the rear panel adhesive surface, and the pressing surface are connected in order and parallel to one another on the side edge of the adhesive piece opposite the rear panel, A packaging box with cushioning function as described in claim 4, wherein the connecting protrusion is provided at a position close to the back panel glued surface at the lower end of the bottom side of the left panel partition surface along the connecting direction with the back panel glued surface, and the retaining piece is provided at the tip of the connecting protrusion, separated by the fold line for the retaining piece.

6. A packaging box with a cushioning function, which is made up of one box-forming piece, has four side surfaces consisting of a back panel, a left panel, a front panel, and a right panel assembled to a cylinder, and an adhesive piece that is continuous with the back panel located at one end in the connecting direction of the four side surfaces and is glued to the back surface of the right panel located at the other end in the connecting direction of the four side surfaces to hold the cylinder, and is provided with a lid that closes the upper open end of the cylinder when assembled, and a bottom that closes the lower open end, and the cylinder has a partition within it that cushions and holds the contents, The partition section is provided with a front panel partition surface that runs along the back surface of the front panel at a predetermined interval, a left panel partition surface that runs along the back surface of the left panel at a predetermined interval, a back panel glued surface that is glued to the back surface of the back panel, and a pressing surface that is continuous with the back panel glued surface and is positioned in a cantilevered state so as to chamfer the corner formed by the back panel and the right panel, and the area surrounded by the front panel partition surface, the left panel partition surface, and the pressing surface forms a storage space for the storage item, a bottom support portion extending across the storage space is provided near the bottom portion, a surface of the bottom support portion intersects with the bottom portion, and a lower end portion of the bottom support portion is located near the bottom portion; a bottom support portion provided in a position where it abuts against the bottom cover piece that forms part of the bottom when the partition portion is assembled, and a bottom support portion provided in a position where it abuts against the bottom cover piece that forms part of the bottom when the four side surfaces are assembled into a three-dimensional shape; and a packaging box with a cushioning function, characterized in that the bottom support portion is pressed by the bottom cover piece when the four side surfaces are assembled into a three-dimensional shape, and can be assembled three-dimensionally.

7. The box-forming piece is provided by connecting the adhesive piece, the rear panel, the left panel, the front panel, and the right panel in parallel to one another, and the front panel side partition surface, the left panel partition surface, the rear panel adhesive surface, and the pressing surface are connected in order and parallel to one another on the side edge of the adhesive piece opposite the rear panel, a bottom support piece cut line is provided near the lower end of the bottom side of the front panel partition surface and the left side panel partition surface, one end of the bottom support piece cut line is located midway along the length of the front panel partition surface in the direction of connection with the left side panel partition surface, one end of the bottom support piece cut line is located midway along the length of the left side panel partition surface in the direction of connection with the front panel partition surface, bottom support piece fold lines are formed between the pair of ends of the bottom support piece cut line and the lower end of the front panel partition surface and the left side panel partition surface, the area between the pair of bottom support piece fold lines, the bottom support piece cut line, and the lower end of the front panel partition surface and the left side panel partition surface forms the bottom support portion, and a corner fold line is provided in the bottom support portion between the pair of bottom support piece fold lines, 7. The packaging box with cushioning function according to claim 6, wherein, in an assembled state, the bottom support portion is folded from the front panel partition surface and the left side panel partition surface at the bottom support piece fold lines to cross the storage space, and is folded at the corner fold lines to be assembled three-dimensionally, and the corner fold lines are located near the center of the storage space.

8. A packaging box with cushioning function as described in claim 7, wherein a bottom-raising partition that protrudes toward the bottom is provided at the lower end of the front panel partition surface and the left side panel partition surface at a position that coincides with the bottom support portion, and the bottom-raising partition is formed so that it abuts against the bottom cover piece that forms part of the bottom when the partition portion is assembled, causing the bottom support portion to bend, and is located in a position that does not abut against the bottom cover piece when the partition portion is assembled.

Images