cushioning mechanism for packaging boxes

Abstract

To provide a packaging box with a buffer function having a simple structure, requiring fewer assembly steps, and having a high buffering function and a stable support structure.SOLUTION: A packaging box with buffer function according to the present invention consists of one box-forming piece 12, and a glued piece 22 is provided at one end in a connecting direction of four surfaces assembled into a cylindrical body and glued to a back surface of the other end to form the cylindrical body. At an open end portion of the cylindrical body, a lid piece 32 is provided to close the open end, and a buffer flap 48 is provided to be folded inside the lid piece 32. The buffer flap 48 is continuous with the lid piece 32, is folded in half along a fold line 54, and overlaps within inside of the lid piece 32. A rising portion 56 is provided in a middle of the folding line 54 of the buffer flap 48 which is folded in half. The rising portion 56 stands up crossing the buffer flap 48 which is folded in half, a pair of side edges 58 are all formed in parallel, and a buffer space 88 is formed inside the buffer flap 48 which is folded in half.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a packaging box with a buffering function for cushioningly accommodating contents on the lid side.

Background Art

[0002] Conventionally, there has been a packaging box with a buffering function for cushioningly and individually accommodating liquid cosmetics in bottles, etc., for transportation and sales. For example, the packaging box disclosed in Patent Document 1 includes four side surfaces assembled to a cylindrical body connected in parallel, a lid piece formed at an end of one side surface for closing the opening of the cylindrical body, and a flap formed at an end of the other side surface on the lid piece side. A folding portion is connected to the edge portion of this flap, and further, an attachment portion pasted to the inner surface of the side surface is connected to the end portion of the folding portion. When this packaging box folds the flap at a right angle to the side surface, the attachment portion is located inside the side surface, the folding portion is pushed in its surface direction and curved inside the packaging box, and it acts as a buffering material attached to the flap.

[0003] Furthermore, there is also one having a support piece that rises substantially at a right angle inside the box body continuously with the flap. The packaging box with a buffering function disclosed in Patent Document 2 includes four side surfaces assembled to a cylindrical body connected in parallel, a lid piece formed at an end of one side surface for closing the opening of the cylindrical body, and a flap formed at an end of the other side surface on the lid piece side. The flaps are provided continuously on a pair of opposing side surfaces, and at the end of each flap, there are provided a first support piece that rises inside the box body at a substantially right angle to the flap in the assembled state, a second support piece that is located parallel to the flap continuously with the end of the first support piece, and a pasting piece pasted to the inner surface of the side surface, provided in this order. In the assembled state, the ends of the pair of second support pieces abut against each other, the length of the pair of second support pieces continuous with each other is formed longer than the lid piece, the pair of second support pieces bulge inside the box body, contact the contents, and have a high buffering effect.

[0004] Furthermore, some designs have flaps and lid pieces that are integrated and continuous. The article storage box described in Patent Document 3 has four sides that are connected in parallel to form a cylindrical body, a lid piece formed at the end of one side to close the opening of the cylindrical body, and flaps formed at the ends of the other sides on the lid piece side. Each flap has a flap portion connected to the side via a mountain fold line and a gap closing portion connected to the lid piece via a mountain fold line. The flap portion and the gap closing portion are connected by a valley fold line. This ensures that when the box body is closed with the lid piece, insects and other pests are reliably prevented from entering through the gap in the lid piece.

[0005] The edged carton of Patent Document 4 is assembled into a cylindrical shape by connecting parallel plates, with a rear plate, side plates, front plate, side plates, and adhesive pieces that are glued to the rear plate in that order. Edge pieces are provided at the upper ends of the rear plate and a pair of side plates via horizontal fold lines, and a smaller adhesive piece is provided at the upper end of the adhesive piece glued to the rear plate via a horizontal fold line. A lid plate is provided at the upper end of the edge piece of the rear plate via a horizontal fold line, and an adhesive piece that is glued to the lid plate is provided at the upper end of the smaller adhesive piece via a horizontal fold line. A folded piece having a pair of equiangled fold lines is connected between the lid plate and the edge piece of the side plate adjacent to the rear plate via a fold line. A folded piece having a pair of equiangled fold lines is also connected between the adhesive piece glued to the lid piece and the edge piece of the side plate adjacent to the adhesive piece glued to the rear plate via a fold line. As a result, when assembled, the edge pieces are folded along the fold lines, and each pair of folded pieces is folded in half along a pair of equiangled fold lines, making them tightly attached to the underside of the lid plate, eliminating the risk of accidental opening, and allowing for one-touch opening when needed.

[0006] In addition to these, there are also designs in which the flap and lid are integrated and have a cushioning function. The cushioning packaging box disclosed in Patent Document 5 has an extension plate continuous with the lid and a pressing plate continuous with the flap, which are provided in a continuous manner with each other. The pressing plate is formed in a substantially triangular shape. As a result, when the box is closed with the lid, the pressing plate extending from the inner surface of the lid into the box presses each flap down below the top opening, and the corners of the flaps located on the extension of the fold line between the pressing plate and the flap can hold and retain pharmaceuticals and various other articles with each flap. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 10-86933 [Patent Document 2] Japanese Patent Publication No. 2008-143565 [Patent Document 3] Japanese Patent Publication No. 2007-223648 [Patent Document 4] Official Gazette No. 63-13138 [Patent Document 5] Japanese Patent Publication No. 2023-300 [Overview of the project] [Problems that the invention aims to solve]

[0008] In the packaging box structures disclosed in Patent Documents 1 and 2, the flaps are extended and glued, resulting in a complex structure and increased assembly time. On the other hand, in the packaging boxes disclosed in Patent Documents 3 and 4, the lid and flap are integrated, resulting in a simple structure, but they do not have a cushioning function.

[0009] Furthermore, in the case of the packaging box disclosed in Patent Document 5, it is a combination of a lid and flap structure similar to that of Patent Documents 3 and 4, and the cushioning structure of Patent Documents 1 and 2. Structurally, the corners where the flap is folded press against the contents at points or on inclined surfaces, making it unstable and resulting in weak holding power. There is also a risk that the contents may come loose from the corners due to vibrations during transportation. For these reasons, it is difficult to obtain high cushioning functionality.

[0010] This invention has been made in view of the problems of the background art described above, and aims to provide a packaging box with a cushioning function that has a simple structure, requires few assembly steps, and has high cushioning function and a stable support structure. [Means for solving the problem]

[0011] The present invention relates to a packaging box with a cushioning function, comprising a single box-forming piece, four sides of a box assembled into a cylindrical shape, and a glued piece provided at one end of the four sides in the connecting direction, glued to the back surface of the other end of the four sides in the connecting direction to hold the cylindrical shape, and an opening end formed by the four sides connected in the assembled state, provided with a lid piece to close the opening end and a cushioning flap that is folded over on the inside of the lid piece, the cushioning flap being continuous with the lid piece and folded in half along a fold line and overlapped on the inside of the lid piece, a raised portion provided in the middle of the fold line of the folded cushioning flap, the raised portion rising up intersecting the folded cushioning flap and having a pair of side edges along the longitudinal direction of the fold line, creating a gap between the folded cushioning flaps and forming a cushioning space inside the folded cushioning flaps.

[0012] The box-forming piece is formed by connecting a back panel on which the lid is provided, and a left side panel and a right side panel on which the cushioning flap is provided, parallel to each other; the cushioning flap is formed between the back panel and the left side panel and / or the right side panel; the pair of side edges of the rising portion are formed parallel to each other; the folding line is provided on the cushioning flap from the intersection of the edges of the back panel and the left side panel and / or the right side panel; an end cutting line is provided on the extension of the folding line in a direction intersecting the folding line; and the rising portion is provided by the end cutting line and the pair of side edges.

[0013] The aforementioned folding line is provided to bisect the space between the edges of the back panel and the left side panel and / or the right side panel, and the center of the rising portion is located on the extension of the folding line.

[0014] The aforementioned rising portion is rectangular, and side edge cutting lines or side edge fold lines are provided along each of the pair of side edges of the rising portion, and an end cutting line is provided at the end of the rising portion. A hole may be provided between the fold line and the rising portion.

[0015] At the end of the cover piece on the side opposite to the back panel, insertion pieces are provided separated by folding lines, and cut lines are formed along the folding lines at both ends of the folding lines. On the buffer flap, locking pieces that are locked to the cut lines when the cover piece is closed are integrally provided separated by slits.

[0016] The portion where the buffer flap and the cover piece contact each other It is a broken line. May be separated by a zipper line and continuous.

[0017] The buffer flap is continuously formed from the end of one side panel of the box body assembled to the cylinder body, and a pressing flap that overlaps the buffer flap is provided on the side of the other side panel. The pressing flap overlaps the side of the buffer flap on the side of the contents in a state where the box body is assembled and folded toward the opening end side, and is formed so that the contents can be pressed by the upright portion of the buffer flap when the cover piece is closed.

[0018] The pressing flap may be continuously formed from the end of the side panel of the box body assembled to the cylinder body that faces the buffer flap. Or, the pressing flap is pasted and overlapped on the side panel of the box body assembled to the cylinder body The aforementioned adhesive piece It may be formed by extending from the end of the plate piece.

Advantages of the Invention

[0019] The packaging box with a buffer function of the present invention has two buffer flaps with a buffer space inside the cover piece that are folded and overlapped, and the contents can be buffered and accommodated. It has a simple structure, few assembly steps, and a high buffer function. In particular, a stable support and a gap for the buffer function are formed by upright portions where a pair of side edges are formed parallel to each other, and the contents are reliably buffered and protected.

Brief Description of the Drawings

[0020] [Figure 1]Partial broken perspective view (a) of the packaging box with a buffer function according to the first embodiment of the present invention in an open state at one opening end, and partial broken perspective view (b) in a closed state. [Figure 2] Partial broken perspective view (a) of the packaging box with a buffer function according to the first embodiment of the present invention in an open state at the other opening end, and partial broken perspective view (b) in a closed state. [Figure 3] Development view of the box body forming piece of the packaging box with a buffer function according to the first embodiment of the present invention. [Figure 4] Partial broken perspective view (a) of the packaging box with a buffer function according to the second embodiment of the present invention in an open state at one opening end as viewed from the left, and partial broken perspective view (b) in a closed state as viewed from the left. [Figure 5] Partial broken perspective view (a) of the packaging box with a buffer function according to the second embodiment of the present invention in an open state at one opening end as viewed from the right, and partial broken perspective view (b) in a closed state as viewed from the right. [Figure 6] Development view of the box body forming piece of the packaging box with a buffer function according to the second embodiment of the present invention. [Figure 7] Partial broken perspective view (a) of the packaging box with a buffer function according to the third embodiment of the present invention in an open state at one opening end, and partial broken perspective view (b) in a closed state. [Figure 8] Development view of the box body forming piece of the packaging box with a buffer function according to the third embodiment of the present invention. [Figure 9] Partial broken perspective view (a) of a modified example of the packaging box with a buffer function according to the third embodiment of the present invention in an open state at one opening end, and partial broken perspective view (b) in a closed state. [Figure 10] Development view of the box body forming piece of a modified example of the packaging box with a buffer function according to the third embodiment of the present invention. [Figure 11] Partial broken perspective view (a) of another modified example of the packaging box with a buffer function according to the third embodiment of the present invention in an open state at one opening end, and partial broken perspective view (b) in a closed state. [Figure 12] Development view of the box body forming piece of another modified example of the packaging box with a buffer function according to the third embodiment of the present invention. [Figure 13]These are partial break section perspective views (a) and partial break section perspective views (b) of yet another modification of the third embodiment of the cushioning packaging box of this invention, with one end open and the other closed. [Figure 14] This is an unfolded view of a box-forming piece for yet another modification of the third embodiment of the cushioning packaging box of the present invention. [Modes for carrying out the invention]

[0021] The embodiments of this invention will now be described based on the drawings. Figures 1 to 3 show the first embodiment of this invention, in which the cushioning packaging box 10 of this embodiment is a substantially rectangular box body, formed by assembling box-forming pieces 12 that are integrally punched out from a single blank sheet of cardboard or the like.

[0022] Figure 3 is an unfolded view of the box-forming piece 12 as seen from the surface. The box-forming piece 12 is formed by connecting a back panel 14, a left side panel 16, a front panel 18, and a right side panel 20, which form the four cylindrical sides of the box, in parallel to each other. The back panel 14, left side panel 16, front panel 18, and right side panel 20 are all the same length in the width direction where they are connected. In the connection direction, the back panel 14 and front panel 18 are longer and approximately equal in length, while the left side panel 16 and right side panel 20 are shorter and approximately equal in length. Furthermore, the side edge of the back panel 14 is provided with an adhesive tab 22, which is glued to the back surface of the right side panel 20 when the cushioning packaging box 10 is assembled. The adhesive tab 22, back panel 14, left side panel 16, front panel 18, and right side panel 20 are separated by fold lines 24, 26, 28, and 30, respectively.

[0023] At one end of the back panel 14, perpendicular to the direction in which the sides are connected, a rectangular cover piece 32 for closing the open end is provided, separated by a fold line 34. At the end of the cover piece 32 opposite to the fold line 34, an insert piece 36 is provided, separated by a fold line 38. At the end of the back panel 14 opposite to the fold line 34, a cover piece 40 of the same shape as the cover piece 32 is provided, separated by a fold line 42, and an insert piece 44 of the same shape as the insert piece 36 is provided, separated by a fold line 46.

[0024] A buffer flap 48 is provided on the left side panel 16 at the end adjacent to the fold line 34 of the back panel 14, separated by a fold line 50. The buffer flap 48 is formed in the shape of a quarter circle with its center point at the boundary between the back panel 14 and the left side panel 16, that is, the point where the fold line 34 and the fold line 50 are continuous, and its radius being the length of the fold line 50. The portion of the buffer flap 48 that is in contact with the lid piece 32 is separated and continuous by a fold line 52. A fold line 54 is provided on the buffer flap 48 radially from the center point. The fold line 54 has a cut or the like formed in it and is a straight line at a 45° angle, which is the bisector of the fold lines 50 and 52, and the length of the fold line 54 is approximately half the radius. Between the end 54a of the fold line 54 opposite to the center point and the circumferential portion 48a of the cushioning flap 48, a raised portion 56 is provided to create a gap between the folded cushioning flap 48 when the cushioning flap 48 is folded in half along the fold line 54 in the assembled state.

[0025] The rising portion 56 is a rectangle that is long in one direction, with its length in the longitudinal direction being approximately half the radius of the buffer flap 48, and its width intersecting the longitudinal direction being approximately one-third of the longitudinal direction. The rising portion 56 is formed by a pair of side edges 56a along the longitudinal direction, the circumferential portion 48a of the buffer flap 48, and an end portion 56b which is a short straight line intersecting the longitudinal direction on the opposite side of the circumferential portion 48a of the buffer flap 48. The rising portion 56 is provided so that its longitudinal direction coincides with the extension direction of the fold line 54, and the center of the rising portion 56 is located on the extension line of the fold line 54. Along each of the pair of side edges 56a of the rising portion 56, a side edge cutting line 58 is provided, separating it from the rest of the buffer flap 48, and an end cutting line 60 is provided along the end portion 56b of the rising portion 56. Furthermore, the pair of side edge cutting lines 58 are formed to be shorter than the side edge 56a of the rising portion 56, and the area between the circumferential portion 48a of the buffer flap 48 and the end cutting line 60 is left uncut. Also, the end 54a of the fold line 54 is located slightly away from the end cutting line 60, and the area between the fold line 54 and the end cutting line 60 is left uncut.

[0026] On the left side panel 16, at the end opposite the fold line 50, a cushioning flap 62, identical in shape to the cushioning flap 48, is provided, separated by a fold line 64. The cushioning flap 62 is formed in the shape of a quarter circle with a radius equal to the length of the fold line 64, centered at the boundary between the back panel 14 and the left side panel 16, that is, the point where the fold line 42 and the fold line 64 are continuous. The portion of the cushioning flap 62 that is in contact with the lid piece 40 is separated and continuous by a fold line 66.

[0027] The buffer flap 62 is provided with a fold line 68 in the radial direction. The fold line 68 has a cut or the like formed in it and is a straight line at a 45° angle to the fold lines 64 and 66. The length of the fold line 68 is about one-fifth of the radius, and a hole 70 is continuously provided at the end 68a of the fold line 68 opposite the center point. The hole 70 is formed by penetrating the buffer flap 62, is pentagonal, and is continuous with the end 68a and is formed by a pair of hypotenuses that intersect each other at an acute angle, a pair of sides that are continuous with the ends of the hypotenuses and are substantially parallel to the fold line 68, and a side that connects the ends of these parallel sides and is positioned substantially perpendicular to the fold line 68.

[0028] Between the hole 70 and the circumferential portion 62a of the cushioning flap 62, there is a raised portion 72 that creates a gap between the folded cushioning flap 62 when the cushioning flap 62 is folded in half along the fold line 68 in the assembled state. The raised portion 72 is a rectangle that is long in one direction, and its length in the longitudinal direction is from the hole 70 to the circumferential portion 62a of the cushioning flap 62, and the width intersecting the longitudinal direction is about one-third of the longitudinal direction, which is approximately equal to the width of the hole 70, that is, the distance between a pair of parallel sides of the hole 70. The width intersecting the longitudinal direction is set to, for example, about 3 mm to about 10 mm. The raised portion 72 is formed from a pair of side edges 72a along the longitudinal direction, the circumferential portion 62a of the cushioning flap 62, and an end portion 72b which is a short straight line that intersects the longitudinal direction on the opposite side from the circumferential portion 62a of the cushioning flap 62. The vertical portion 72 is provided with its longitudinal direction coinciding with the extension direction of the fold line 68, and the center of the vertical portion 72 is located on the extension line of the fold line 68. Along each of the pair of side edges 72a of the vertical portion 72, a side edge cutting line 74 is provided, separating it from the rest of the buffer flap 62. The end 72b of the vertical portion 72 coincides with the side of the hole 70 that is located approximately perpendicular to the fold line 68. The pair of side edge cutting lines 74 are formed to be shorter than the side edges 72a of the vertical portion 72, leaving a gap between the circumferential portion 62a of the buffer flap 62 and the hole 70.

[0029] No other components are provided at the end 18a of the front panel 18 adjacent to the fold line 50 of the left side panel 16, and at the end 18b adjacent to the fold line 64 of the left side panel 16.

[0030] On the right side panel 20, a deformed trapezoidal folding flap 76 is provided at the end adjacent to the end 18a of the front panel 18, separated by a fold line 78. The length of the folding flap 76 from the fold line 78 to the opposite edge is formed to cover approximately half of the opening of the cylindrical body of the cushioning packaging box 10, and is sized so as not to interfere with the cushioning flap 48 when the cushioning packaging box 10 is assembled.

[0031] On the right side panel 20, at the end adjacent to the end 18b of the front panel 18, a foldable flap 80 symmetrical to the foldable flap 76 is provided, separated by a crease line 82. The length of the foldable flap 80, from the crease line 82 to the opposite edge, is formed to cover approximately half of the opening of the cylindrical body of the cushioning packaging box 10, and is sized so as not to interfere with the cushioning flap 62 when the cushioning packaging box 10 is assembled.

[0032] Next, an example of how to assemble the cushioning packaging box 10 of this embodiment will be described. Here, Figure 3 shows the surface of the box-forming piece 12 of the cushioning packaging box 10, and the folding method in which the surface of the box-forming piece 12 becomes convex is called a forward fold, and the folding method in which the back surface becomes convex is called a reverse fold.

[0033] First, the box is folded along the crease line 26, and glue 86 is applied to the surface of the adhesive piece 22. Then, the box is folded along the crease line 30. As a result, the surface of the adhesive piece 22 is glued to the back surface of the right side panel 20, and the box-forming piece 12 is folded. In this state, the folded packaging box 10 with cushioning function, made up of the box-forming piece 12, is shipped to the factory that will package the contents.

[0034] Next, in the factory where the contents are stored and packaged, the fold lines 24, 26, 28, and 30 are each folded at a 90° angle to form a rectangular cylinder. Then, at one open end of the rectangular cylinder, as shown in Figure 1(a), the folded flap 76 is folded along the fold line 78, and then the cushioning flap 48 is folded in the reverse direction along the fold line 54, while the lid piece 32 is folded along the fold line 34. At this time, the fold lines 50 and 52 are also folded in the reverse direction. The rising portion 56 is folded in the reverse direction from the cushioning flap 48 along the side edge cutting line 58, separated from the cushioning flap 48 along the end cutting line 60, rises approximately perpendicular to the folded cushioning flap 48, and creates a gap between the folded cushioning flap 48.

[0035] The inside of the folded cushioning flap 48 becomes a cushioning space 88, and the gap in the cushioning space 88 is secured, providing a high level of cushioning function. Then, the fold line 34 is folded at approximately a right angle, and the fold line 38 is folded in a straight line, and the insertion piece 36 is inserted inward from the end 18a of the front plate 18, closing one of the openings as shown in Figure 1(b). With one of the openings closed, the contents are then placed inside the rectangular cylindrical body.

[0036] Next, at the other open end of the rectangular cylinder, as shown in Figure 2(a), the folding flap 80 is folded in the right direction along the fold line 82, and then the cushioning flap 62 is folded in the wrong direction along the fold line 68 while the lid piece 40 is folded in the right direction along the fold line 42. The rising part 72 is folded in the wrong direction from the cushioning flap 62 along the side edge cutting line 74, separated from the cushioning flap 62 by the hole 70, and rises at approximately a right angle to the folded cushioning flap 62, creating a gap between the folded cushioning flap 62. The inside of the folded cushioning flap 62 becomes a cushioning space 88, ensuring a gap in the cushioning space 88 and providing high cushioning function. Then, the fold line 42 is folded in the right direction at approximately a right angle, and the fold line 46 is folded in the right direction to insert the insertion piece 44 inward from the end 18b of the front plate 18, closing the remaining opening as shown in Figure 2(b). This completes the packaging.

[0037] In this embodiment of the cushioning packaging box 10, cushioning flaps 48 and 62, each having a cushioning space 88, are folded in half and stacked inside the lid pieces 32 and 40, allowing for cushioned storage of contents. The structure is simple, assembly time is low, and it has a cushioning space gap corresponding to a strong reference value, providing high cushioning functionality. The rising parts 56 and 72 have a pair of side edges 56a and 72a that are parallel to each other and also parallel to the folding lines 54 and 68. As a result, the pair of side edges 56a and 72a of the cushioning flaps 48 and 62 are in contact with the upper surface of the contents parallel to each other, and the cushioning flaps 48 and 62 press down on the contents with their surface, providing stable support for the contents. The cushioning space 88 is maintained at a constant interval, ensuring consistent cushioning functionality. Furthermore, there is no need to provide separate cushioning pieces, and the process of gluing cushioning pieces is unnecessary. The width of the rising parts 56 and 72 can be changed to match the required cushioning space 88, without needing to change the size of the cushioning flaps 48 and 62, making it easy to adapt.

[0038] Next, a second embodiment of the present invention will be described with reference to Figures 4 to 6. Here, components similar to those in the above embodiment are denoted by the same reference numerals and their descriptions are omitted. The cushioning packaging box 90 of this embodiment is a rectangular box body, formed by assembling box-forming pieces 92 that are integrally punched out from a single blank sheet of cardboard or the like.

[0039] Figure 6 is an unfolded view of the box-forming piece 92 as seen from the surface. The box-forming piece 92 is formed by connecting a front panel 18, a right side panel 20, a back panel 14, and a left side panel 16, which form the four cylindrical sides of the box, in parallel to each other. The front panel 18, right side panel 20, back panel 14, and left side panel 16 are all the same length in the width direction where they are connected. In the connection direction, the front panel 18 and back panel 14 are longer and approximately equal in length, while the right side panel 20 and left side panel 16 are shorter and approximately equal in length. Furthermore, the side edge of the front panel 18 is provided with an adhesive tab 22, which is glued to the back surface of the left side panel 16 when the cushioning packaging box 90 is assembled. The adhesive tab 22, front panel 18, right side panel 20, back panel 14, and left side panel 16 are separated by fold lines 25, 27, 29, and 31, respectively.

[0040] First, let's describe the back panel 14, which is the second from the right on the drawing, on the four sides of the box-forming piece 92. At one end of the back panel 14, perpendicular to the direction in which the sides are connected, a rectangular lid piece 32 is provided, separated by a fold line 34. At the end of the lid piece 32 opposite the fold line 34, an insert piece 36 is provided, separated by a fold line 38. At both ends of the fold line 38, notches 109 are formed along the fold line 38, which are to be locked by a locking piece 108, which will be described later.

[0041] A first bottom cover piece 98 is provided at the end of the back panel 14 opposite to the fold line 34, separated by the fold line 100. The first bottom cover piece 98 is formed in a roughly trapezoidal shape with the fold line 100 as its lower base, and the length from the fold line 100 to the end piece 98a, which is the upper base parallel to the fold line 100, is the length located near the center line of the bottom portion when the cushioning packaging box 90 is assembled, that is, it is approximately half the width of the left side panel 16 and the right side panel 20. On the left side panel 16 side of the end piece 98a, a pentagonal bottom adhesive piece 102 is provided, separated by the fold line 104. The fold line 104 is provided in a direction that intersects with the fold line 100. A small rectangular first bottom insertion piece 106 is integrally provided on the end piece 98a, on the opposite side from the bottom adhesive piece 102, and protruding outward from the end piece 98a.

[0042] A buffer flap 63 is provided at the end of the left side panel 16 that connects to the fold line 34 of the back panel 14, separated by a fold line 65. The buffer flap 63 is formed as a right-angled triangle with the boundary between the back panel 14 and the left side panel 16, that is, the point where the fold line 34 and the fold line 65 are continuous, as the right-angle corner. The portion of the buffer flap 63 that is in contact with the lid piece 32 is This is a break line for separation. The sections are separated and continuous by a zipper wire 67. The edge of the side of the buffer flap 63 that is in contact with the lid piece 32 is formed at approximately a right angle to the zipper wire 67.

[0043] A locking piece 108 is integrally provided at the corner of the edge of the cushioning flap 63 that is in contact with the left side panel 16, projecting in the direction of extension of the side edge 16a of the left side panel 16, opposite to the fold line 31. The locking piece 108 is formed by being surrounded by a side edge that coincides with the extension of the side edge 16a, the hypotenuse of the cushioning flap 63, an end that is substantially parallel to the fold line 65, and a slit 110 that extends from the hypotenuse of the cushioning flap 63 at a position closer to the zipper line 67 than the side edge 16a. The slit 110 is formed to a length of approximately half the length from the hypotenuse of the cushioning flap 63 to the fold line 65, with the end of the slit 110 and the fold line 65 left uncut. The end of the slit 110 on the side of the fold line 65 is bent in an arc toward the zipper line 67. The cushioning flap 63 is provided with a fold line 68, a hole 70, a raised portion 72, and a side edge cutting line 74, similar to the cushioning flap 62 of the cushioning packaging box 10 of the first embodiment.

[0044] On the left side panel 16, at the end opposite to the fold line 65, a roughly trapezoidal bottom flap 112 is provided, separated by the fold line 114.

[0045] A buffer flap 49 is provided at the end of the right side panel 20 that connects to the fold line 34 of the back panel 14, separated by a fold line 51. The buffer flap 49 is formed as a right-angled triangle with the boundary between the back panel 14 and the right side panel 20, that is, the point where the fold line 34 and the fold line 51 are continuous, as the right-angle corner. The portion of the buffer flap 49 that is in contact with the lid piece 32 is This is a break line for separation. The two sections are separated and continuous by a zipper line 53. The buffer flap 49 is symmetrical to the buffer flap 63 and is sized so that they do not interfere with each other. The corners at the ends of the edges of the buffer flap 49 that are in contact with the lid piece 32 are formed at approximately a right angle to the zipper line 53.

[0046] The corner of the edge of the cushioning flap 49 that is in contact with the right side panel 20 is integrally provided with a locking piece 108 that protrudes in the direction of extension of the fold line 27. The locking piece 108 is formed by being surrounded by a side edge that coincides with the extension of the fold line 27, the hypotenuse of the cushioning flap 49, an end that is substantially parallel to the fold line 51, and a slit 110 that is provided extending from the hypotenuse of the cushioning flap 49 at a position closer to the zipper line 53 than the fold line 27. The slit 110 is formed to a length of approximately half the length from the hypotenuse of the cushioning flap 49 to the fold line 51, and the area between the end of the slit 110 and the fold line 51 is left uncut. The end of the slit 110 on the side of the fold line 51 is bent in an arc toward the zipper line 53. The cushioning flap 49 is provided with a fold line 54, a raised portion 56, a side edge cutting line 58, and an end cutting line 60, similar to the cushioning flap 48 of the cushioning packaging box 10 of the first embodiment.

[0047] On the right side panel 20, at the end opposite to the fold line 51, a roughly trapezoidal bottom flap 116 is provided, separated by a fold line 118.

[0048] The end 18a of the front panel 18, adjacent to the fold line 51 of the right side panel 20, is provided with an opening break line 94 that surrounds the center of the end 18a in a U-shape. Inside the break line 94 is an adhesive portion 96 for inserting a piece. On the end of the front panel 18 opposite to the end 18a, a second bottom cover piece 120 is provided, separated by a fold line 122. The second bottom cover piece 120 has the same shape as the first bottom cover piece 98, and the portion of the end 120a, which is the upper bottom parallel to the fold line 122, on the right side panel 20 side is provided with a pentagonal bottom adhesive piece 124, separated by a fold line 126. The fold line 126 is provided in a direction that intersects with the fold line 122. A second bottom insert piece 128 is integrally provided on the end 120a at a position opposite to the bottom adhesive piece 124.

[0049] Next, an example of how to assemble the cushioning packaging box 90 of this embodiment will be described. Here, Figure 6 shows the surface of the box-forming piece 92 of the cushioning packaging box 90, and the folding method in which the surface of the box-forming piece 92 becomes convex is called a forward fold, and the folding method in which the back surface becomes convex is called a reverse fold.

[0050] First, fold along fold lines 100, 114, 118, and 122 in the right direction, then fold along fold lines 104 and 126 in the reverse direction, and apply glue 130 to the back of the bottom glued pieces 102 and 124 respectively. Adhesive 132 is applied to the surface. Then, the fold line 27 is folded in a straight line, and the bottom adhesive piece 124 is glued to the surface of the bottom flap 116. Furthermore, the fold line 31 is folded in a straight line, and the adhesive piece 22 is glued to the back of the left side panel 16, and the bottom adhesive piece 102 is glued to the surface of the bottom flap 112. As a result, the box-forming piece 92 is folded, and in this state, the cushioning packaging box 90 made of the box-forming piece 92 is shipped to the factory that will package the contents.

[0051] Next, fold the crease lines 25, 27, 29, and 31 at 90° angles to form a rectangular cylinder. At this time, since the bottom adhesive pieces 102 and 124 are glued to the bottom flaps 112 and 116 respectively, the crease lines 100, 114, 118, and 122, which were folded in half, are automatically raised and opened to approximately 90°, forming the bottom. Then, place the contents inside.

[0052] Next, as shown in Figures 4(a) and 5(a), the cushioning flaps 49 and 63 are folded in the reverse direction along the fold lines 54 and 68, while the lid piece 32 is folded in the correct direction along the fold line 34. The zipper lines 53 and 67 and the fold lines 51 and 65 are also folded in the correct direction. The rising parts 56 and 72 are folded in the reverse direction from the cushioning flaps 49 and 63, respectively, along the side edge cutting lines 58 and 74, rising approximately perpendicular to the folded cushioning flaps 49 and 63, and creating a gap between the folded cushioning flaps 49 and 63. The inside of the folded cushioning flaps 49 and 63 each becomes a cushioning space 88, and the gap in the cushioning space 88 is secured, providing a high cushioning function. Furthermore, the fold line 34 is folded at approximately a right angle, the fold line 38 is folded in a straight line, the insert piece 36 is inserted inward from the end 18a of the front panel 18, the lid piece 32 is closed, and the packaging is completed as shown in Figures 4(b) and 5(b).

[0053] At this time, the portions of the cushioning flaps 49 and 63 on the side of the fold lines 51 and 65 sink inward into the box body, but the tip of the locking piece 108 is separated from the cushioning flaps 49 and 63 at the slit 110 and rises up, positioned near the end 18a. The locking piece 108 is locked onto the notches 109 formed at both ends of the fold line 38.

[0054] The cushioning packaging box 90 of this embodiment has the same effects as the above embodiment. Furthermore, the locking pieces 108 of the cushioning flaps 49,63 are locked to the notched lines 109 of the lid piece 32, and even if the portion of the cushioning flaps 49,63 close to the fold lines 51,65 is pushed down toward the contents by the rising portions 56,72 of the cushioning flaps 49,63, the lid piece 32 is prevented from opening unintentionally. The locking pieces 108 of the cushioning flaps 49,63 are formed via slits 110, and when separated from the cushioning flaps 49,63, the tip of the locking piece 108 rises up and is securely locked to the notched lines 109 of the lid piece 32. Between the lid piece 32 and the cushioning flaps 49,63, This is a break line for separation. Because zippers 53 and 67 are provided, the lid piece 32 and the cushioning flaps 49 and 63 can be separated when opening, allowing the cushioning flaps 49 and 63 to open easily without getting in the way, and making it easy to take out the contents. In addition, the bottom can be assembled with a single touch, making it easy to manufacture.

[0055] Next, a third embodiment of the present invention will be described with reference to Figures 7 and 8. Here, components similar to those in the above embodiments are denoted by the same reference numerals and their descriptions are omitted. The cushioning packaging box 136 of this embodiment is a rectangular box, formed by assembling box-forming pieces 137 that are integrally punched out from a single blank sheet of cardboard or the like.

[0056] The cushioning packaging box 136 is the same as in the first embodiment described above, and as shown in Figure 8, the back panel 14, left side panel 16, front panel 18, and right side panel 20 are formed by connecting them parallel to each other. The side edge of the back panel 14 is provided with adhesive tabs 22 that are glued to the back surface of the right side panel 20 when the cushioning packaging box 136 is assembled. The adhesive tabs 22, back panel 14, left side panel 16, front panel 18, and right side panel 20 are separated by fold lines 24, 26, 28, and 30, respectively.

[0057] In this embodiment, the bottom can be assembled with a single touch, similar to the second embodiment described above. A first bottom cover piece 98 is provided on the lower edge of the back panel 14 opposite to the fold line 34, separated by a fold line 100. The first bottom cover piece 98 is formed in a substantially trapezoidal shape with the fold line 100 as the lower base. The length from the fold line 100 to the end piece 98a, which is the upper base parallel to the fold line 100, is the length located near the center line of the bottom portion when the cushioning packaging box 160 is assembled, that is, approximately half the width of the left side panel 16 and the right side panel 20. The portion of the end piece 98a on the left side panel 16 side is provided with a pentagonal bottom adhesive piece 102 separated by a fold line 104. The fold line 104 is provided in a direction that intersects with the fold line 100. At the end portion 98a, a small, rectangular first bottom insertion piece 106 is integrally provided, protruding outward from the end portion 98a at a position opposite to the bottom adhesive piece 102.

[0058] A second bottom cover piece 120 is provided on the end of the front panel 18 opposite to the end 18a, separated by a fold line 122. The second bottom cover piece 120 has the same shape as the first bottom cover piece 98, and on the right side of the side panel 20, the portion of the end 120a, which is the upper bottom parallel to the fold line 122, is provided with a pentagonal bottom adhesive piece 124 separated by a fold line 126. The fold line 126 is provided in a direction that intersects with the fold line 122. A second bottom insert piece 128 is integrally provided on the end 120a at a position opposite to the bottom adhesive piece 124.

[0059] On the left side panel 16, a roughly trapezoidal bottom flap 112 is provided at the end opposite to the fold line 140, separated by a fold line 114. On the right side panel 20, a roughly trapezoidal bottom flap 116 is also provided at the end opposite to the fold line 78, separated by a fold line 118.

[0060] A rectangular cushioning flap 138 is provided on the left side panel 16, separated by a fold line 140, and the portion of the cushioning packaging box 136 that contacts the lid piece 32 is separated by a zipper line 67. The cushioning flap 138 is provided with a fold line 68, a hole 70, and a raised portion 72, similar to the cushioning flap 62 of the cushioning packaging box 10 of the first embodiment, and a side edge fold line 75 is provided along each of the pair of side edges 72a of the raised portion 72, separating it from the rest of the cushioning flap 138. Furthermore, the cushioning flap 138 is formed with a locking piece 108 separated by a slit 110, similar to the cushioning flap 63 of the cushioning packaging box 90 of the second embodiment.

[0061] Near the longitudinal center of the rising portion 72, a tongue-shaped piece 134 is provided to contact and press against the upper end of the contents. The tongue-shaped piece 134 is surrounded by a U-shaped tongue-shaped cutting line 142. The pair of ends of the tongue-shaped cutting line 142 are continuous with the pair of side edge fold lines 75 on the left side panel 16 at approximately a right angle, and the central straight portion is located slightly beyond the side edge fold line 75 on the lid piece 32 side, and this central straight portion is approximately parallel to the side edge fold line 75.

[0062] On the right side panel 20, a foldable flap 76 is provided, separated by a fold line 78 from the cushioning flap 138. The foldable flap 76 is sized so as not to interfere with the cushioning flap 138 when the cushioning packaging box 136 is assembled.

[0063] Next, the assembly method of the cushioning packaging box 136 will be described. The back panel 14, left side panel 16, front panel 18, and right side panel 20 are formed into a rectangular cylinder, the bottom is automatically formed, and the contents are placed inside. Next, as shown in Figure 7(a), the folding flap 76 is folded in the right direction along the crease line 78, and the cushioning flap 138 is folded in the wrong direction along the crease line 68, while the cushioning flap 138 is folded in the right direction along the crease line 140. The zipper line 67 is also folded in the right direction. The rising parts 72 are each folded in the wrong direction from the cushioning flap 138 along the side edge crease line 75, rising approximately perpendicular to the folded cushioning flap 138 and creating a gap between the folded cushioning flap 138. The inside of the folded cushioning flap 138 becomes the cushioning space 88. Then, the fold line 34 is folded at approximately a right angle, and the fold line 38 is folded in a straight line to insert the insert piece 36 inward from the end 18a of the front panel 18, completing the packaging as shown in Figure 7(b).

[0064] When the cushioning flap 138 is folded in the reverse direction along the side edge fold line 75, the tongue piece 134 protrudes from the side edge fold line 75, flush with the left side panel 16 side of the cushioning flap 138. In other words, the tongue piece 134 is continuously formed from the portion of the cushioning flap 138 located on the side of the box that is contained within the box, allowing it to make contact with the contents over a wide area.

[0065] With this cushioned packaging box 136, the area protected by the tongue 134 is increased, providing a wider hold on the contents and ensuring secure protection. The cushioning flaps 138 may be provided in pairs, but if the box is small, it may be difficult to remove the contents, so they may be provided on only one side, with the other side being a folded flap 76.

[0066] The cushioning packaging box 136 of this embodiment also has the same effects as the first embodiment, and since it is provided with a tongue 134 that presses and supports the upper end of the contents, it can protect the contents more stably and reliably in a cushioning manner.

[0067] Next, a modified example of the third embodiment of this invention will be described with reference to Figures 9 and 10. Here, components similar to those in the above embodiments are denoted by the same reference numerals and their descriptions are omitted. The cushioning packaging box 144 of this embodiment is a rectangular box, formed by assembling box-forming pieces 146 that are integrally punched out from a single blank sheet of cardboard or the like.

[0068] Similar to the third embodiment described above, the cushioning packaging box 144 is formed by connecting a back panel 14, a left side panel 16, a front panel 18, and a right side panel 20 parallel to each other, as shown in Figure 10. The side edge of the back panel 14 is provided with adhesive tabs 22, which are glued to the back surface of the right side panel 20 when the cushioning packaging box 144 is assembled. The adhesive tabs 22, back panel 14, left side panel 16, front panel 18, and right side panel 20 are separated by fold lines 24, 26, 28, and 30, respectively.

[0069] In this embodiment, the bottom can be assembled with a single touch, similar to the second embodiment described above. A first bottom cover piece 98 is provided on the lower edge of the back panel 14, separated by a fold line 100. A pentagonal bottom adhesive piece 102 is provided on the left side of the left side panel 16 at the end 98a of the first bottom cover piece 98, separated by a fold line 104. A small, rectangular first bottom insertion piece 106 is integrally provided on the end 98a, opposite to the bottom adhesive piece 102, and protruding outward from the end 98a. Furthermore, a second bottom cover piece 120 is provided on the end of the front panel 18, opposite to the end 18a, separated by a fold line 122. The second bottom cover piece 120 has the same shape as the first bottom cover piece 98, and a pentagonal bottom adhesive piece 124 is provided on the right side of the end 120a of the second bottom cover piece 120, separated by a folding line 126. A second bottom insert piece 128 is integrally provided on the end 120a at a position opposite to the bottom adhesive piece 124.

[0070] On the left side panel 16, a roughly trapezoidal bottom flap 112 is provided at the end opposite to the fold line 140, separated by a fold line 114. On the right side panel 20, a roughly trapezoidal bottom flap 116 is provided at the end opposite to the fold line 78, separated by a fold line 118.

[0071] In this embodiment, the cushioning packaging box 144 has a cushioning flap 138 continuously formed from the end of one left side panel 16 of the cylindrical box body. On the other right side panel 20, a pressing flap 148 is continuously provided, which is sized to overlap the cushioning flap 138.

[0072] The pressure flap 148 is formed to be approximately the same length as the extension of the lid piece 32, and when folded toward the open end of the cylindrical body of the cushioning packaging box 144, it overlaps the lower side of the cushioning flap 138 on the side facing the contents, and is formed to cushion, support, and press the contents when the lid piece 32 is closed. As a result, even if the cushioning flap 138 is provided on only one left side panel 16, the contents can be stably and reliably protected with cushioning. Furthermore, it effectively performs its cushioning function even when the contents move or vibrate inside the cushioning packaging box 144.

[0073] Next, another modification of the third embodiment of this invention will be described with reference to Figures 11 and 12. Here, components similar to those in the above embodiments are denoted by the same reference numerals and their descriptions are omitted. The cushioning packaging box 150 of this embodiment is a rectangular box body, formed by assembling box-forming pieces 152 that are integrally punched out from a single blank sheet of cardboard or the like.

[0074] As shown in Figure 12, the cushioning packaging box 150 is formed by connecting a front panel 18, a right side panel 20, a back panel 14, and a left side panel 16 parallel to each other. The front panel 18, right side panel 20, back panel 14, and left side panel 16 are all the same length in the width direction where they are connected. In the connection direction, the front panel 18 and back panel 14 are longer and approximately equal in length, while the right side panel 20 and left side panel 16 are shorter and approximately equal in length. Furthermore, the side edge of the front panel 18 is provided with an adhesive piece 154, which is a piece of metal that is glued to the back surface of the left side panel 16 when the cushioning packaging box 150 is assembled. The adhesive piece 154, the front panel 18, the right side panel 20, the back panel 14, and the left side panel 16 are separated by fold lines 25, 27, 29, and 31, respectively.

[0075] In this embodiment, the bottom can be assembled with a single touch, similar to the second embodiment described above. A first bottom cover piece 98 is provided on the lower edge of the back panel 14, and a pentagonal bottom adhesive piece 102 is provided on the left side of the left side panel 16 side of the end 98a of the first bottom cover piece 98, separated by a fold line 104. Furthermore, a second bottom cover piece 120 is provided on the end of the front panel 18 opposite to the end 18a. The second bottom cover piece 120 has the same shape as the first bottom cover piece 98, and a pentagonal bottom adhesive piece 124 is provided separated by a fold line 126.

[0076] On the left side panel 16, a roughly trapezoidal bottom flap 112 is provided at the end opposite to the fold line 78, separated by a fold line 114. On the right side panel 20, a roughly trapezoidal bottom flap 116 is provided at the end opposite to the fold line 51, separated by a fold line 118.

[0077] The cushioning packaging box 150 has a cushioning flap 49 with the same structure as the second embodiment described above. The cushioning flap 49 is formed as a right-angled triangle with a right-angle corner at the boundary between the back panel 14 and the right side panel 20, that is, at the point where the fold lines 34 and 51 are continuous. The portion of the cushioning flap 49 that is in contact with the lid piece 32 is separated and continuous by a zipper line 53. The cushioning flap 49 is formed to a size that does not interfere with the folded flap 76. The corner at the tip of the edge of the cushioning flap 49 that is in contact with the lid piece 32 is formed at approximately a right angle to the zipper line 53.

[0078] The corner of the edge of the cushioning flap 49 that is in contact with the right side panel 20 is integrally provided with a locking piece 108 that protrudes in the direction of extension of the fold line 27. The locking piece 108 is formed by being surrounded by a side edge that coincides with the extension of the fold line 27, the hypotenuse of the cushioning flap 49, an end that is substantially parallel to the fold line 51, and a slit 110 that is provided extending from the hypotenuse of the cushioning flap 49 at a position closer to the zipper line 53 than the fold line 27. The slit 110 is formed to a length of approximately half the length from the hypotenuse of the cushioning flap 49 to the fold line 51, and the area between the end of the slit 110 and the fold line 51 is left uncut. The end of the slit 110 on the side of the fold line 51 is bent in an arc toward the zipper line 53. The cushioning flap 49 is provided with a fold line 54, a raised portion 56, a side edge cutting line 58, and an end cutting line 60, similar to the cushioning flap 48 of the cushioning packaging box 10 of the first embodiment.

[0079] The adhesive piece 154 is formed wider in the connecting direction of each side than the adhesive piece 22 of the third embodiment, and is formed in a substantially trapezoidal shape, slightly narrower than the width of the left side panel 16. The upper end of the adhesive piece 154 is located slightly towards the bottom lid side than the end 18a of the front panel 18, and a pressing flap 158 is continuously provided parallel to the end 18a via a fold line 156. The pressing flap 158 extends from the fold line 156 parallel to the lid piece 32 and is formed to a length approximately the same as the length of the lid piece 32 in the extending direction. The width of the pressing flap 158 in the direction perpendicular to the extending direction is formed to be narrower than the width of the lid piece 32. When the pressing flap 158 is folded towards the open end side of the cylindrical body of the cushioning packaging box 150, it overlaps below the cushioning flap 49 and is formed to cushion, support and press the contents when the lid piece 32 is closed.

[0080] This structure ensures that the contents are reliably and securely protected with cushioning, even if the cushioning flap 49 is provided on only one of the right side panels 20. Furthermore, it effectively performs its cushioning function even when the contents move or vibrate within the cushioning packaging box 150. The fold line 156 of the pressure flap 158 is located closer to the bottom lid than the fold line 34 of the lid piece 32, so the pressure flap 158 contacts the upper end of the contents more perpendicularly and provides stable support.

[0081] Next, yet another modification of the third embodiment of this invention will be described with reference to Figures 13 and 14. Here, components similar to those in the above embodiments are denoted by the same reference numerals and their descriptions are omitted. The cushioning packaging box 160 of this embodiment is a rectangular box body, formed by assembling box-forming pieces 162 that are integrally punched out from a single blank sheet of cardboard or the like.

[0082] As shown in Figure 14, the cushioning packaging box 160 is formed by connecting a left side panel 16, a front panel 18, a right side panel 20, and a back panel 14 parallel to each other. The left side panel 16, front panel 18, right side panel 20, and back panel 14 are all the same length in the width direction where they are connected. In the connection direction, the front panel 18 and back panel 14 are longer and approximately equal in length, while the right side panel 20 and left side panel 16 are shorter and approximately equal in length. Furthermore, the side edge of the left side panel 16 is provided with an adhesive piece 164, which is a plate piece that is glued to the back surface of the back panel 14 when the cushioning packaging box 160 is assembled. The adhesive piece 164, left side panel 16, front panel 18, right side panel 20, and back panel 14 are separated by fold lines 33, 25, 27, and 29, respectively.

[0083] In this embodiment, the bottom can be assembled with a single touch, similar to the second embodiment described above. A first bottom cover piece 98 is provided on the lower edge opposite to the fold line 166 of the adhesive piece 164 glued to the inside of the back panel 14, separated by a fold line 100. The first bottom cover piece 98 is formed in a substantially trapezoidal shape with the fold line 100 as the lower base. The length from the fold line 100 to the end piece 98a, which is the upper base parallel to the fold line 100, is the length located near the center line of the bottom portion when the cushioning packaging box 160 is assembled, that is, approximately half the width of the left side panel 16 and the right side panel 20. The portion of the end piece 98a on the left side panel 16 side is provided with a pentagonal bottom adhesive piece 102 separated by a fold line 104. The fold line 104 is provided in a direction that intersects with the fold line 100. At the end portion 98a, a small, rectangular first bottom insertion piece 106 is integrally provided, protruding outward from the end portion 98a at a position opposite to the bottom adhesive piece 102.

[0084] Furthermore, a second bottom cover piece 120 is provided at the end of the front panel 18 opposite to the end 18a. The second bottom cover piece 120 has the same shape as the first bottom cover piece 98, and a pentagonal bottom adhesive piece 124 is provided separated by a fold line 126. Also, nothing is formed on the lower edge of the back panel 14 opposite to the fold line 34.

[0085] On the left side panel 16, a roughly trapezoidal bottom flap 112 is provided at the end opposite to the fold line 78, separated by a fold line 114. On the right side panel 20, a roughly trapezoidal bottom flap 116 is provided at the end opposite to the fold line 51, separated by a fold line 118.

[0086] The cushioning packaging box 160 has a cushioning flap 49 with the same structure as in the second embodiment described above, and the portion of the cushioning flap 49 that contacts the lid piece 32 is separated and continuous by a zipper line 53. The cushioning flap 49 is sized so as not to interfere with the folded flap 76. The corners at the ends of the edges of the cushioning flap 49 that contact the lid piece 32 are formed at approximately right angles to the zipper line 53.

[0087] The corner of the edge of the cushioning flap 49 that contacts the right side panel 20 is integrally provided with a locking piece 108 that protrudes in the direction of extension of the fold line 27. The locking piece 108 is formed by being surrounded by a side edge that coincides with the extension of the fold line 27, the slanted edge of the cushioning flap 49, an end that is substantially parallel to the fold line 51, and a slit 110 that extends from the slanted edge of the cushioning flap 49 at a position closer to the zipper line 53 than the fold line 27. The cushioning flap 49 is provided with a fold line 54, a rising portion 56, a side edge cutting line 58, and an end cutting line 60, similar to the cushioning flap 48 of the cushioning packaging box 10 of the first embodiment.

[0088] The adhesive piece 164 is formed wider in the connecting direction of each side than the adhesive piece 22 of the third embodiment, and is rectangular in shape, slightly narrower than the width of the back panel 14. The upper end of the adhesive piece 164 is located slightly towards the bottom lid side than the fold line 78 of the left side panel 16, and a pressing flap 168 is continuously provided parallel to the fold line 78 via the fold line 166. The pressing flap 168 extends from the fold line 166 parallel to the lid piece 32 and is formed to a length approximately the same as the length of the lid piece 32 in the extending direction. The width of the pressing flap 168 in the direction perpendicular to the extending direction is formed to be slightly narrower than the width of the lid piece 32. When the pressing flap 168 is folded towards the open end side of the cylindrical body of the cushioning packaging box 160, it overlaps below the cushioning flap 49 and is formed to cushion, support, and press the contents when the lid piece 32 is closed.

[0089] This structure ensures that even if the cushioning flap 49 is provided on only one side, the contents can be reliably and securely protected with cushioning. Furthermore, it effectively provides cushioning even when the contents move or vibrate within the cushioning packaging box 160. The fold line 166 of the pressure flap 168 is located closer to the bottom lid than the fold line 34 of the lid piece 32, so the pressure flap 168 contacts the upper end of the contents more perpendicularly and provides stable support.

[0090] It should be noted that the cushioning packaging box of this invention is not limited to the above embodiments. The size and shape of the box can be changed to suit the contents. The arrangement of the four side panels—back panel, left side panel, front panel, and right side panel—can be changed as appropriate. The cushioning flap may be provided on either the top lid side, the bottom lid side, or both, as in the above embodiments. If two rising sections are provided for a single product, both may be parallel rectangles, or they may have different shapes. One may be a folded flap, and the combination can be freely set according to the purpose. The compression flap may also be provided on either the top lid side, the bottom lid side, or both, depending on the size of the contents and the box. The rising sections may be separated by end cutting lines or holes and side edge folding lines, or they may be separated together with side edge cutting lines. For example, the holes and side edge fold lines are used when the paper thickness of the box-forming piece is thick and the cushioning space is wide, while the side edge cutting lines are used when the paper thickness is thin and the cushioning space is narrow. [Explanation of Symbols]

[0091] 10,90,136,144,150,160 Packaging box with buffer function 12,92,137,146,152,162 Box forming piece 14 Back plate 16 Left side plate 20 Right side plate 22 Glued piece 32,40 Lid piece 36 Insertion piece 38 Folding lines 48, 62, 49, 63, 138 cushioning flap 48a, 62a Circumferential part 54, 68 Folding lines 54a end 56,72 Vertical section 58,74 Side edge cutting line 75. Fold lines on the side edges 60 End cutting line 70 Hole 76 Fold-over flap 88 Buffer space 108 Locking piece 110 slits 109 Cutting line 148,158,168 Compression flaps

Claims

1. It consists of a single box-forming piece, and the box is assembled into a cylindrical shape with four sides, and an adhesive piece is provided at one end of the four sides in the connecting direction, which is glued to the back surface of the other end of the four sides in the connecting direction to hold the cylindrical shape, and at the open end formed by the four sides connected in the assembled state, a lid piece is provided to close the open end, and a buffer flap is provided that is folded over on the inside of the lid piece. The buffer flap is continuous with the lid piece, folded in half along the fold line and overlapped on the inside of the lid piece, and a raised portion is provided in the middle of the fold line of the folded buffer flap. The aforementioned rising portion intersects with the folded cushioning flap and has a pair of side edges along the longitudinal direction of the fold line, creating a gap between the folded cushioning flap and forming a cushioning space inside the folded cushioning flap, thus providing a cushioning box for packaging.

2. The box-forming piece is formed by connecting a back panel on which the lid is provided, and a left side panel and a right side panel on which the cushioning flap is provided, parallel to each other, and the cushioning flap is formed between the back panel and the left side panel and / or the right side panel. The pair of side edges of the rising portion are formed parallel to each other, and the folding line is provided on the buffer flap from the intersection of the edges of the back panel and the left side panel and / or the right side panel. The packaging box with cushioning function according to claim 1, wherein an end cutting line is provided on the extension of the aforementioned folding line in a direction intersecting the aforementioned folding line, and the raised portion is provided by the end cutting line and the pair of side edges.

3. The packaging box with cushioning function according to claim 2, wherein the fold line is provided to bisect the space between the edges of the back panel and the left side panel and / or the right side panel, and the center of the raised portion is located on the extension of the fold line.

4. The packaging box with cushioning function according to claim 1 or 2, wherein the raised portion is rectangular, a side edge cutting line or side edge folding line is provided along each of the pair of side edges of the raised portion, and an end cutting line is provided at the end of the raised portion.

5. A packaging box with a cushioning function according to claim 1 or 2, wherein a hole is provided between the fold line and the rising portion.

6. An insertable piece is provided at the end of the lid piece opposite the back plate, separated by a crease line, and notches are formed along the crease line at both ends of the crease line. The cushioning flap is integrally provided with a locking piece separated by a slit, which engages with the notched line when the lid is closed, in the cushioning flap, as described in claim 2 or 3.

7. The packaging box with cushioning function according to claim 1 or 2, wherein the portion where the cushioning flap and the lid piece are in contact is separated by a break line and is continuous.

8. The cushioning flap is formed continuously from the end of one side panel of the box body assembled into a cylindrical shape, and a pressing flap is provided on the other side panel that overlaps the cushioning flap, the pressing flap overlaps the cushioning flap on the contents side when the box body is assembled and folded toward the open end, and is formed so that the contents can be pressed by the rising portion of the cushioning flap when the lid is closed, according to claim 1.

9. The packaging box with a cushioning function according to claim 8, wherein the pressing flap is formed continuously from the end of the side plate facing the cushioning flap of the box body assembled into a cylindrical body.

10. The pressing flap is formed by extending from the end of a plate piece that is superimposed on and glued to the side plate of the box body assembled into a cylindrical body, and also serves as the glued piece.

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