Packaging cushioning material

Abstract

The present invention provides a packing cushioning material that allows for easy and simple packing of items to be packed. [Solution] When packaging an object Z, the packaging cushioning material X1 is used to secure the object Z to the surface 7 of the mounting plate 21 by placing the object Z on the surface 7 of the mounting plate 21, folding the second flat plate 12 back onto the surface of the first flat plate 11, folding the first and second side plate portions 33 and 34 back onto the back surface 8 of the first outer plate portions 22 and 23, folding the folded plate portion 35 back onto the back surface 8 of the mounting plate 21, raising the first and second outer plate portions 22 and 23 towards the surface 7 of the mounting plate 21, raising the first and second inner plate portions 31 and 32 towards the surface 7 of the mounting plate 21, raising the first and second side plate portions 33 and 34 towards the surface 7 of the mounting plate 21, and lowering the first and second leg plate portions 26 and 27 from the back surface 8 of the mounting plate 21.

Description

TECHNICAL FIELD

[0001] The present invention relates to a cushioning material for packaging that is used when packaging a packaging target (article, product) for transportation (carrying) and the like. BACKGROUND ART

[0002] As a cushioning material for packaging, Patent Document 1 discloses an impact-mitigating transport container. The impact-mitigating transport container includes a plurality (two) of product holding members, and each product holding member has a flexible film and a product pressing piece. Each product holding member is assembled into a rectangular parallelepiped by folding the fourth side piece of the developed paper piece back to the back surface of the product pressing piece with the folded portion as a boundary, and adhering the corner pieces at both ends of the fourth side piece to the back surfaces of the second and third side pieces.

[0003] In the impact-mitigating transport container, the respective product holding members are stacked one above the other, and the product is sandwiched, supported and held by the flexible film and the product pressing piece. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] PATENT DOCUMENT 1 Japanese Utility Model Registration No. 3145636 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] In Patent Document 1, it is necessary to fold back and adhere paper pieces to fabricate a plurality of product holding members, which complicates the packaging work for articles.

[0006] The present invention is to provide a cushioning material for packaging that allows the packaging target to be packaged simply and easily when packaging the packaging target (article, product). MEANS FOR SOLVING THE PROBLEMS

[0007] Claim 1 of the present invention comprises a flat plate body formed in the shape of a flat plate having a plate length, plate width and plate thickness, having first and second outer surfaces in the plate length direction and third and fourth outer surfaces in the plate width direction, and a pressing sheet, wherein the flat plate body has, in the plate length direction of the flat plate body, a first straight line arranged parallel to the first outer surface at a first interval and intersecting the third and fourth outer surfaces, a second straight line arranged parallel to the first straight line at a second interval and a third interval at the second outer surface in the plate length direction and intersecting the third and fourth outer surface, and in the plate length direction, the 1. A third straight line is positioned between the outer surface and the first straight line, and in the plate width direction of the flat plate, it is positioned at a fourth interval on the third outer surface and perpendicular to the first outer surface and the first straight line, and in the plate length direction, it is positioned between the first outer surface and the first straight line, and in the plate width direction, it is positioned at a fifth interval on the fourth outer surface and at a sixth interval on the third straight line and perpendicular to the first outer surface and the first straight line, and in the plate length direction, it is positioned between the second outer surface and the first straight line, and in the plate width direction, it is positioned at a seventh interval on the third outer surface A fifth straight line is positioned between the third outer surface and the third straight line at an interval of eight intervals from the third straight line, perpendicular to the first straight line and intersecting the second outer surface; a sixth straight line is positioned between the second outer surface and the first straight line in the length direction of the plate, at an interval of nine intervals from the fourth outer surface and ten intervals from the fourth straight line in the width direction of the plate, and at an interval of eleven intervals from the fifth straight line, perpendicular to the first straight line and intersecting the second outer surface; and a twelfth straight line is positioned between the second outer surface and the third straight line in the length direction of the plate. Separated by a distance, parallel to the second straight line at a distance of 13 intervals, perpendicular to the fifth and sixth straight lines, and intersecting the third and fourth outer surfaces, a seventh straight line, positioned in the length direction of the plate, on the first outer surface at a distance of 1 notch intervals, and extending in the width direction of the plate from the third straight line toward the center line of the plate width between the third and fourth straight lines, a second notch, positioned in the length direction of the plate, separated from the first notch by a distance of 2 notch intervals, and separated from the first straight line by a distance of 3 notch intervals, and extending in the width direction of the plate from the third straight line toward the center line of the plate width,In the plate width direction, a third cut is positioned between the third straight line and the plate width center line, with a fourth cut spacing from the plate width center line and parallel to the third straight line with a fifth cut spacing; in the plate length direction, a third cut extends between the first and second cuts and is formed continuously with the first and second cuts; in the plate length direction, a fourth cut is positioned on the first outer surface with a first cut spacing from it, and in the plate width direction, a fourth cut extends from the fourth straight line toward the plate width center line; and in the plate length direction... The plate has a fifth cut, which is positioned at a sixth cut interval from the fourth cut and at a seventh cut interval from the first straight line, extending in the plate width direction from the fourth straight line toward the plate width centerline, and a sixth cut, which is positioned between the fourth straight line and the plate width centerline in the plate width direction, parallel to the plate width centerline at a fourth cut interval and parallel to the fourth straight line at a fifth cut interval, extending in the plate length direction between the fourth and fifth cuts and formed continuously with the fourth and fifth cuts. The first flat plate is divided by the first straight line, the first outer surface, and the third and fourth outer surfaces, and the second flat plate is divided by the first straight line, the second outer surface, the third and fourth outer surfaces, and is folded back onto the surface of the first flat plate along the first straight line, and each of the cuts penetrates the first flat plate in the thickness direction of the plate and opens onto the surface and back of the first flat plate, and the first flat plate is divided by the first outer surface, the first straight line, the third and fourth straight lines and the first to sixth cuts, and the plate of the mounting plate is divided by the first outer surface, the first straight line, the third straight line and the third outer surface, and is folded back onto the surface of the mounting plate along the third straight line. The first outer plate portion is raised on the surface side, the second outer plate portion is divided by the first outer surface, the first straight line, the fourth straight line, and the fourth outer surface, and is raised on the surface side of the aforementioned mounting plate portion along the fourth straight line, the first leg plate portion is continuous with the first outer plate portion and is divided by the first notch, the second notch, and the third notch, and the second leg plate portion is continuous with the second outer plate portion and is divided by the fourth notch, the fifth notch, and the sixth notch, and the second flat plate is divided by the first straight line, the second straight line, the fifth straight line, and the third outer surface, and is folded back onto the surface of the first outer plate portion along the first straight line.A first inner plate portion that rises up toward the surface side of the aforementioned mounting plate portion along the fifth straight line, a second inner plate portion that is divided by the first straight line, the second straight line, the sixth straight line and the fourth outer surface, folds back toward the surface of the second outer plate portion along the first straight line, and rises up toward the surface side of the aforementioned mounting plate portion along the sixth straight line, a first side plate portion that is divided by the fifth straight line, the seventh straight line and the third outer surface, folds back toward the back surface of the aforementioned mounting plate portion along the second and seventh straight lines, and rises up toward the surface side of the aforementioned mounting plate portion along the fifth straight line, and the sixth straight line, the seventh straight line It has a second side plate portion that is partitioned by the line and the fourth outer surface, folded back to the back surface of the aforementioned mounting plate portion along the second and seventh straight lines, and raised to the surface side of the aforementioned mounting plate portion along the sixth straight line; a folded back plate portion that is partitioned by the fifth and sixth straight lines, the seventh straight line and the second outer surface, folded back to the back surface of the aforementioned mounting plate portion along the seventh straight line; and a packaging window hole that is partitioned by the first straight line, the fifth straight line, the sixth straight line and the seventh straight line, and penetrates the second flat plate in the thickness direction of the flat plate body, opening to the surface and back surface of the second flat plate, The aforementioned pressing sheet covers the packaging window opening and is fixed to the folded plate portion and the aforementioned mounting plate portion. The second flat plate is folded back onto the first flat plate, pressing against the object to be packaged placed on the surface of the aforementioned mounting plate portion. The first leg plate portion rises up from the back surface of the aforementioned mounting plate portion due to the raising of the first outer plate portion along the third straight line, and protrudes from the folded plate portion folded back onto the back surface of the aforementioned mounting plate portion. The second leg plate portion rises up from the back surface of the aforementioned mounting plate portion due to the raising of the second outer plate portion along the fourth straight line, and protrudes from the folded plate portion folded back onto the back surface of the aforementioned mounting plate portion.

[0008] Claim 2 of the present invention provides that the second flat plate has a first sheet pressing plate portion connected to the first inner plate portion in the length direction of the plate, separated by a first pressing plate spacing in the first straight line and a second pressing plate spacing in the seventh straight line, and a first sheet pressing plate portion projecting from the fifth straight line to the packaging window hole in the width direction of the plate, and a second sheet pressing plate portion connected to the second inner plate portion in the length direction of the plate, separated by a third pressing plate spacing in the first straight line and a fourth pressing plate spacing in the seventh straight line, and a second sheet pressing plate portion projecting from the sixth straight line to the packaging window hole in the width direction of the plate, separated by a sheet pressing plate spacing in the first sheet pressing plate portion, and the pressing sheet is The packaging cushioning material according to claim 1 is characterized in that it covers the packaging window hole and is arranged on the surface of the first and second inner plate sections, the surface of the folded plate section, the surface of the first and second sheet pressing plate sections, and the surface of the aforementioned mounting plate section, and is fixed to the first and second inner plate sections, the folded plate section, and the aforementioned mounting plate section, the first sheet pressing plate section is lowered by the raising of the first inner plate section along the fifth straight line and pressed against the pressing sheet, and the second sheet pressing plate section is lowered by the raising of the second inner plate section along the sixth straight line and pressed against the pressing sheet.

[0009] Claim 3 of the present invention provides a flat plate body formed in the shape of a flat plate having a plate length, plate width and plate thickness, and a pressing sheet, wherein the flat plate body has a first flat plate and a second flat plate that is folded over to the plate surface of the first flat plate, the first flat plate having a mounting plate portion, a first outer plate portion that is arranged in the plate width direction of the flat plate body in a continuous manner with one plate width end of the mounting plate portion and connected to the mounting plate portion and raised on the plate surface side of the mounting plate portion, and a second outer plate portion that is arranged in the plate width direction of the flat plate body in a continuous manner with the other plate width end of the mounting plate portion and connected to the mounting plate portion and raised on the plate surface side of the mounting plate portion 2. An outer plate portion; a first leg hole portion located on one end of the plate width of the aforementioned mounting plate portion in the plate width direction, passing through the aforementioned mounting plate portion in the plate thickness direction of the flat plate body, and opening on the plate surface and back surface of the aforementioned mounting plate portion; a second leg hole portion located on the other end of the plate width of the aforementioned mounting plate portion, separated from the first leg hole portion by a leg hole arrangement interval in the plate width direction, passing through the aforementioned mounting plate portion in the plate thickness direction, and opening on the plate surface and back surface of the aforementioned mounting plate portion; and a first leg plate portion connected to the first outer plate portion, projecting from the first outer plate portion to the first leg hole portion in the plate width direction. The second flat plate has a second leg plate portion connected to the second outer plate portion and projecting from the second outer plate portion to the second leg hole portion in the plate width direction, and the second flat plate has a first inner plate portion connected to the first outer plate portion in the plate length direction of the flat plate body, folded back to the plate surface of the first outer plate portion and raised on the plate surface side of the aforementioned mounting plate portion, and a second inner plate portion arranged opposite to the first inner plate portion with an inner plate spacing in the plate width direction, connected to the second outer plate portion in the plate length direction, folded back to the plate surface of the second outer plate portion and raised on the plate surface side of the aforementioned mounting plate portion. , in the length direction of the plate, the first inner plate portion is positioned between the first outer plate portion and connected to the first inner plate portion, folded back to the back surface of the aforementioned mounting plate portion, and raised on the surface side of the aforementioned mounting plate portion; the second inner plate portion is positioned between the second outer plate portion and connected to the second inner plate portion in the length direction of the plate, folded back to the back surface of the aforementioned mounting plate portion, and raised on the surface side of the aforementioned mounting plate portion; the folded back plate portion is positioned between the first and second side plate portions and connected to the first and second side plate portions, and folded back to the back surface of the aforementioned mounting plate portion;The packaging cushioning material has a packaging window opening partitioned by the aforementioned mounting plate portion, the first and second inner plate portions, and the folded plate portion, the pressing sheet covers the packaging window opening and is fixed to the folded plate portion and the aforementioned mounting plate portion, the second flat plate is pressed against the article placed on the surface of the aforementioned mounting plate portion by the folding of the second flat plate toward the first flat plate, the first leg plate portion rises up from the back surface of the aforementioned mounting plate portion by the raising of the first outer plate portion and protrudes from the folded plate portion that is folded toward the back surface of the aforementioned mounting plate portion, and the second leg plate portion rises up from the back surface of the aforementioned mounting plate portion by the raising of the second outer plate portion and protrudes from the folded plate portion that is folded toward the back surface of the aforementioned mounting plate portion.

[0010] Claim 4 of the present invention is a packing cushioning material according to Claim 3, characterized in that the second flat plate has a first sheet pressing plate portion connected to the first inner plate portion and projecting from the first inner plate portion to the packing window hole in the plate width direction, and a second sheet pressing plate portion connected to the second inner plate portion and projecting from the second inner plate portion to the packing window hole at a sheet pressing plate spacing from the first sheet pressing plate portion in the plate width direction, and the pressing sheet covers the packing window hole and is arranged on the plate surfaces of the first and second inner plate portions, the plate surface of the folded plate portion, the surface of the first and second sheet pressing plate portions, and the plate surface of the aforementioned mounting plate portion, and is fixed to the first and second inner plate portions, the folded plate portion and the aforementioned mounting plate portion, and the first sheet pressing plate portion is lowered when the first inner plate portion is raised and pressed against the pressing sheet, and the second sheet pressing plate portion is lowered when the second inner plate portion is raised and pressed against the pressing sheet. [Effects of the Invention]

[0011] In this invention, when packaging an object to be packaged (article / product), the object to be packaged is placed on the surface of the mounting plate, the second flat plate is folded back onto the surface of the first flat plate, the first and second side plates are folded back onto the back surfaces of the first and second outer plates, the folded plates are folded back onto the back surfaces of the mounting plate, the first and second outer plates are raised towards the surface of the mounting plate, the first and second inner plates are raised towards the surface of the mounting plate, the first and second side plates are raised towards the surface of the mounting plate, and the first and second leg plates are raised down from the back surface of the mounting plate, protruding from the folded plates that are folded back onto the back surface of the mounting plate, thereby allowing the object to be packaged to be fixed to the surface of the mounting plate with the retaining sheet. The mounting plate holds the object to be packaged between itself and the retaining sheet. This makes the packaging process simpler and easier, as each plate section of the flat body can be folded back along the first to seventh straight lines, raised, and lowered to package the object. [Brief explanation of the drawing]

[0012] [Figure 1] This is a perspective view showing the unfolded packaging cushioning material of the first embodiment. [Figure 2] This is a front view showing the unfolded packaging cushioning material of the first embodiment. [Figure 3] This is a rear view showing the unfolded packaging cushioning material of the first embodiment. [Figure 4] This is a partially enlarged view of Figure 2, and is a front view showing the first flat plate. [Figure 5] This is a partially enlarged view of Figure 2, and is a front view showing the second plate. [Figure 6] This is a cross-sectional view AA in Figure 3. [Figure 7] This figure shows an assembly and packaging method for a packing cushion material of the first embodiment, and is a perspective view showing the object to be packaged placed on the surface of the mounting plate portion (second sheet portion) of the packing cushion material in an unfolded state. [Figure 8] This figure shows an assembly and packaging method for a packing cushioning material of the first embodiment, and is a perspective view showing the second flat plate (first and second inner plate portions) folded back onto the surface of the mounting plate portion. [Figure 9] This is a diagram showing the assembly and packaging method of the packaging cushioning material according to the first embodiment, and is a perspective view in which the first and second side plate portions and the folded plate portion are folded back to the back surface side of the mounting plate portion. [Figure 10] This is a diagram showing the assembly and packaging method of the packaging cushioning material according to the first embodiment, and is a rear view in which the first and second side plate portions and the folded plate portion are folded back to the back surface of the mounting plate portion. [Figure 11] This is a diagram showing the assembly and packaging method of the packaging cushioning material according to the first embodiment, and is a perspective view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised to the front surface side of the mounting plate portion, the first and second leg plate portions are lowered from the back surface of the mounting plate portion, and the first and second sheet pressing plate portions are pressed against the pressing sheet (first sheet portion). [Figure 12] This is a diagram showing the assembly and packaging method of the packaging cushioning material according to the first embodiment, and is a plan view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised to the front surface side of the mounting plate portion, the first and second leg plate portions are lowered from the back surface of the mounting plate portion, and the first and second sheet pressing plate portions are pressed against the pressing sheet (first sheet portion). [Figure 13] This is a diagram showing the assembly and packaging method of the packaging cushioning material according to the first embodiment, and is a rear view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised to the front surface side of the mounting plate portion, the first and second leg plate portions are lowered from the back surface of the mounting plate portion, and the first and second sheet pressing plate portions are pressed against the pressing sheet (first sheet portion). [Figure 14] This is a B-B cross-sectional view of Figure 12. [Figure 15] This is a C-C cross-sectional view of Figure 12. [Figure 16] This is a D-D cross-sectional view of Figure 12. [Figure 17] This is a perspective view showing the assembly packaging cushioning material of the first embodiment and the packaging box. [Figure 18] This is a plan view showing the packaging box containing the assembly packaging cushioning material of the first embodiment. [Figure 19] This is an E-E cross-sectional view of Figure 18. [Figure 20]It is a F-F cross-sectional view of Figure 18. [Figure 21] It is a perspective view showing the developed cushioning material for packaging of the second embodiment. [Figure 22] It is a front view showing the developed cushioning material for packaging of the second embodiment. [Figure 23] It is a rear view showing the developed cushioning material for packaging of the second embodiment. [Figure 24] It is a partially enlarged view of Figure 22, and is a front view showing the first flat plate. [Figure 25] It is a partially enlarged view of Figure 22, and is a front view showing the positional relationship of the first and second sheet pressing plate portions of the second flat plate. [Figure 26] It is a partially enlarged view of Figure 22, and is a front view showing the positional relationship of the reinforcing plate portion (the first and second notched holes). [Figure 27] It is a G-G cross-sectional view of Figure 23. [Figure 28] It is a view showing the assembly and packaging method for the packaging cushioning material of the second embodiment, and is a perspective view in which the reinforcing plate portion is folded back to the back surface of the mounting plate portion. [Figure 29] It is a view showing the assembly and packaging method for the packaging cushioning material of the second embodiment, and is a rear view in which the reinforcing plate portion is folded back to the back surface of the mounting plate portion. [Figure 30] It is a view showing the assembly and packaging method for the packaging cushioning material of the second embodiment, and is a perspective view in which the object to be packaged is placed on the plate surface (the second sheet portion) of the mounting plate portion. [Figure 31] It is a view showing the assembly and packaging method for the packaging cushioning material of the second embodiment, and is a perspective view in which the second flat plate (the first and second inner plate portions) is folded back to the plate surface of the mounting plate portion. [Figure 32] It is a view showing the assembly and packaging method for the packaging cushioning material of the second embodiment, and is a perspective view in which the first and second side plate portions and the folded plate portion are folded back to the back surface side of the mounting plate portion. [Figure 33] It is a view showing the assembly and packaging method for the packaging cushioning material of the second embodiment, and is a rear view in which the first and second side plate portions and the folded plate portion are folded back to the back surface side of the mounting plate portion. [Figure 34]This diagram shows an assembly and packaging method for a packing cushioning material of a second embodiment, in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised toward the surface side of the mounting plate portion, the first and second leg plate portions are lowered from the back surface of the mounting plate portion, and the first and second sheet pressing plate portions are pressed against the pressing sheet (first sheet portion). [Figure 35] This is a diagram showing an assembly and packaging method for a packing cushioning material of a second embodiment, in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised toward the surface side of the mounting plate portion, the first and second leg plate portions are lowered from the back surface of the mounting plate portion, and the first and second sheet pressing plate portions are pressed against the pressing sheet (first sheet portion). [Figure 36] This figure shows an assembly and packaging method for a packing cushioning material of the second embodiment, and is a rear view showing the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions raised toward the surface side of the mounting plate portion, the first and second leg plate portions raised from the back surface of the mounting plate portion, and the first and second sheet pressing plate portions pressed against the pressing sheet (first sheet portion). [Figure 37] Figure 35 is a cross-sectional view of HH. [Figure 38] This is a cross-sectional view II of Figure 35. [Figure 39] This is a cross-sectional view of the JJ section shown in Figure 36. [Figure 40] This is a perspective view showing the cushioning material for assembly and packaging and the packaging box according to the second embodiment. [Figure 41] This is a plan view showing a packaging box containing cushioning material for assembly packaging according to the second embodiment. [Figure 42] Figure 41 is a cross-sectional view of KK. [Figure 43] Figure 41 is a cross-sectional view of LL. [Figure 44] This is a perspective view showing the unfolded packaging cushioning material of the third embodiment. [Figure 45] This is a front view showing the unfolded packaging cushioning material of the third embodiment. [Figure 46] This is a rear view showing the unfolded packaging cushioning material of the third embodiment. [Figure 47]This is a partially enlarged view of Figure 45, and is a front view showing the first flat plate. [Figure 48] This figure shows an assembly and packaging method for a third embodiment of a packaging cushioning material, and is a perspective view showing the object to be packaged placed on the surface of the mounting plate portion (second sheet portion) of the packaging cushioning material in an unfolded state. [Figure 49] This figure shows an assembly and packaging method for a packing cushioning material of the third embodiment, and is a perspective view showing the second flat plate (first and second inner plate portions) folded back onto the surface of the mounting plate portion. [Figure 50] This figure shows an assembly and packaging method for a packing cushioning material of the third embodiment, and is a perspective view showing the first and second side plate portions and the folded plate portion folded back to the back side of the mounting plate portion. [Figure 51] This figure shows an assembly and packaging method for a packing cushioning material of the third embodiment, and is a rear view showing the first and second side plate portions and the folded plate portion folded back onto the back surface of the mounting plate portion. [Figure 52] This diagram shows an assembly and packaging method for a packing cushioning material of the third embodiment, in a perspective view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised toward the surface side of the mounting plate portion, and the first to fourth leg plate portions are lowered from the back surface of the mounting plate portion. [Figure 53] This figure shows an assembly and packaging method for a packing cushioning material of the third embodiment, and is a plan view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised on the surface side of the mounting plate portion, and the first to fourth leg plate portions are lowered from the back surface of the mounting plate portion. [Figure 54] Figure 53 is a cross-sectional view of MM. [Figure 55] Figure 53 is a cross-sectional view of NN. [Figure 56] This is a cross-sectional view taken along line O-O in Figure 53. [Figure 57] Figure 53 is a cross-sectional view of the PP. [Figure 58] This is a perspective view showing the cushioning material for assembly and packaging and the packaging box according to the second embodiment. [Figure 59] This is a plan view showing a packaging box containing cushioning material for assembly packaging according to the third embodiment. [Figure 60]Figure 59 is a cross-sectional view of QQ. [Figure 61] Figure 59 is a cross-sectional view of the rear row. [Figure 62] Figure 59 is a cross-sectional view of the SS. [Figure 63] This is a perspective view showing the unfolded packaging cushioning material of the fourth embodiment. [Figure 64] This is a front view showing the unfolded packaging cushioning material of the fourth embodiment. [Figure 65] This is a rear view showing the unfolded packaging cushioning material of the fourth embodiment. [Figure 66] This is a partially enlarged view of Figure 64, and is a front view showing the first flat plate. [Figure 67] This is a partially enlarged view of Figure 64, and is a front view showing the second plate. [Figure 68] This figure shows an assembly and packaging method for a packing cushioning material of the fourth embodiment, and is a perspective view showing the reinforcing plate portion folded back to the back surface of the mounting plate portion. [Figure 69] This figure shows an assembly and packaging method for a packing cushioning material of the fourth embodiment, and is a perspective view showing the object to be packaged placed on the surface of the mounting plate (second sheet portion). [Figure 70] This figure shows an assembly and packaging method for a packing cushioning material of the fourth embodiment, and is a perspective view showing the second flat plate (first and second inner plate portions) folded back onto the surface of the mounting plate portion. [Figure 71] This figure shows an assembly and packaging method for a packing cushioning material of the fourth embodiment, and is a perspective view showing the first and second side plate portions and the folded plate portion folded back to the back side of the mounting plate portion. [Figure 72] This figure shows an assembly and packaging method for a packing cushioning material of the fourth embodiment, in a perspective view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised toward the surface side of the mounting plate portion, and the first and second leg plate portions are lowered from the back surface side of the mounting plate portion. [Figure 73]This figure shows an assembly and packaging method for a packing cushioning material of the fourth embodiment, and is a plan view in which the first and second outer plate portions, the first and second inner plate portions, and the first and second side plate portions are raised toward the surface side of the mounting plate portion, and the first and second leg plate portions are lowered from the back surface side of the mounting plate portion. [Figure 74] Figure 73 is a cross-sectional view of TT. [Figure 75] This is a perspective view showing the cushioning material for assembly and packaging and the packaging box according to the fourth embodiment. [Figure 76] This is a plan view showing a packaging box containing cushioning material for assembly packaging according to the fourth embodiment. [Figure 77] Figure 76 is a cross-sectional view of the UU. [Modes for carrying out the invention]

[0013] The packaging cushioning material according to the present invention will be described with reference to Figures 1 to 77. Packaging cushioning materials according to the first to fourth embodiments will be described.

[0014] The packaging cushioning material of the first embodiment will be described with reference to Figures 1 to 20. For the sake of clarity, we will first describe the unfolded packaging cushioning material of the first embodiment before assembly, and then explain the procedure for assembling the packaging cushioning material of the first embodiment and packaging the items to be packaged (articles, goods) (assembly and packaging method).

[0015] In Figures 1 to 20, the packaging cushioning material X1 of the first embodiment (hereinafter referred to as "packaging cushioning material X1") comprises a flat plate 1 and a pressing sheet 2 (pressing film).

[0016] As shown in Figures 1 to 6, the flat plate 1 is formed in the shape of a flat plate having a plate length, plate width, and plate thickness. The flat plate 1 is made of a flexible sheet material such as paper, synthetic resin (sheet material), corrugated cardboard (paper corrugated cardboard sheet), or plastic corrugated cardboard, and is formed from, for example, a paper corrugated cardboard sheet or a plastic corrugated cardboard sheet.

[0017] As shown in Figures 1 to 6, the flat plate body 1 has first and second outer surfaces 3 and 4 (first and second outer edges) in the length direction U (Y direction / up and down direction) of the flat plate body 1. The first outer surface 3 (upper edge) and the second outer surface 4 (lower edge) are arranged parallel to each other in the length direction U of the flat plate body 1 (hereinafter referred to as "length direction U").

[0018] As shown in Figures 1 to 6, the flat plate 1 has third and fourth outer surfaces 5 and 6 (third and fourth outer edges) in the plate width direction R (X direction / left-right direction). The third and fourth outer surfaces 5 and 6 intersect the first and second outer surfaces 3 and 4 in the plate length direction U. The plate width direction R is perpendicular to the plate length direction U.

[0019] As shown in Figures 1 to 6, the flat plate body 1 has a plate surface 7 and a plate surface 8 in the plate thickness direction T (Z direction). The plate thickness direction T (Z direction) is perpendicular to the plate length direction U (Y direction) and the plate width direction R (X direction).

[0020] As shown in Figures 1 to 6, the flat plate body 1 has a first straight line L1, a second straight line L2, a third straight line L3, a fourth straight line L4, a fifth straight line L5, a sixth straight line L6, a seventh straight line L7, a first cut LA (first slit), a second cut LB (second slit), a third cut LC (third slit), a fourth cut LD (fourth slit), a fifth cut LE (fifth slit), and a sixth cut LF (sixth slit).

[0021] As shown in Figures 1 to 4, the first straight line L1 is positioned between the first and second outer surfaces 3 and 4 in the plate length direction U. The first straight line L1 is positioned parallel to the first outer surface 3 with a first spacing P1 in the plate length direction U. The first straight line L1 is positioned parallel to the first outer surface 3. In the plate width direction R, the first straight line L1 extends between the third and fourth outer surfaces 5 and 6 and intersects the third and fourth outer surfaces 5 and 6.

[0022] As shown in Figures 1 to 3 and Figure 5, the second straight line L2 is positioned between the first straight line L1 and the second outer surface 4 in the plate length direction U. The second straight line L2 is positioned on the second outer surface 4 with a second spacing P2 in the plate length direction L. The second straight line L2 is positioned parallel to the first straight line L1 with a third spacing P3 in the plate length direction U. The second straight line L2 is positioned parallel to the first straight line L1. In the plate width direction R, the second straight line L2 extends between the third and fourth outer surfaces 5 and 6 and intersects with the third and fourth outer surfaces 5 and 6. The third spacing P3 is, for example, the same spacing as the first spacing P1.

[0023] As shown in Figures 1 to 4, the third straight line L3 is positioned between the third and fourth outer surfaces 5 and 6 in the plate width direction R. The third straight line L3 is positioned on the third outer surface 5 with a fourth spacing P4 in the plate width direction R. The third straight line L3 is positioned between the first outer surface 3 and the first straight line L1 in the plate length direction U. The third straight line L3 extends between the first outer surface 3 and the first straight line L1 in the plate length direction U and is perpendicular to the first outer surface 3 and the first straight line L1.

[0024] As shown in Figures 1 to 4, the fourth straight line L4 is positioned between the third straight line L3 and the fourth outer surface 6 in the plate width direction R. The fourth straight line L4 is positioned on the fourth outer surface 6 with a fifth spacing P5 in the plate width direction R. The fourth straight line L4 is positioned parallel to the third straight line L3 with a sixth spacing P6 in the plate width direction R. The fourth straight line L4 is positioned parallel to the third straight line L3. The fourth straight line L4 is positioned between the first outer surface 3 and the first straight line L1 in the plate length direction U. The fourth straight line L4 extends between the first outer surface 3 and the first straight line L1 in the plate length direction U and is perpendicular to the first outer surface 3 and the first straight line L1. The fifth spacing P5 is, for example, the same spacing as the fourth spacing P4.

[0025] As shown in Figures 1 to 3 and Figure 5, the fifth straight line L5 is positioned between the second outer surface 4 and the first straight line L1 in the plate length direction U. The fifth straight line L5 is positioned between the third outer surface 5 and the third straight line L3 in the plate width direction R. The fifth straight line L1 is positioned parallel to the third outer surface 5 with a seventh spacing P7 and parallel to the third straight line L3 with an eighth spacing P8 in the plate width direction R. The fifth straight line L5 is positioned parallel to the third straight line L3 in the plate width direction R. The fifth straight line L5 extends between the first straight line L1 and the second outer surface 4 in the plate length direction U, perpendicular to the first straight line L1, and intersects the second outer surface 4.

[0026] As shown in Figures 1 to 3 and Figure 5, the sixth straight line L6 is positioned between the second outer surface 4 and the first straight line L1 in the plate length direction U. The sixth straight line L6 is positioned between the fourth outer surface 6 and the fourth straight line L4 in the plate width direction R. The sixth straight line L6 is positioned at a distance of the ninth interval P9 from the fourth outer surface 6 in the plate width direction R. The sixth straight line L6 is positioned parallel to the fourth straight line L4 at a distance of the tenth interval in the plate width direction R. The sixth straight line L6 is positioned parallel to the fourth straight line L4 in the plate width direction R. The sixth straight line L6 is positioned at a distance of the eleventh interval P11 from the fifth straight line L5 in the plate width direction R. The sixth straight line L6 extends between the first straight line L1 and the second outer surface 4 in the plate length direction U, perpendicular to the first straight line L1, and intersects the second outer surface 4. The ninth interval P9 is, for example, the same interval as the seventh interval P7. The 10th interval P10 is, for example, the same interval as the 8th interval P8.

[0027] As shown in Figures 1, 2, and 5, the seventh straight line L7 is positioned between the second straight line L2 and the second outer surface 4 in the plate length direction U. The seventh straight line L7 is positioned on the second outer surface 4 with a 12th spacing P12 in the plate length direction U. The seventh straight line L7 is positioned parallel to the second straight line L2 with a 13th spacing P13 in the plate length direction U. The seventh straight line L7 is positioned parallel to the second straight line L2. In the plate width direction R, the seventh straight line L7 extends between the third and fourth outer surfaces 5 and 6, is perpendicular to the fifth and sixth straight lines L5 and L6, and intersects the third and fourth outer surfaces 5 and 6. The 13th spacing P13 is a spacing that exceeds the plate thickness of the plate body 1 (second plate 12), for example, a spacing that is greater than 1.1 times the plate thickness of the plate body 1 (second plate 12) and less than or equal to 1.5 times.

[0028] As shown in Figures 1 to 4, the first cut LA is positioned in the length direction U of the plate between the first outer surface 3 and the first straight line L1. The first cut LA is positioned in the length direction U of the plate on the first outer surface 3 with a first cut interval P14 between them. The first cut interval P14 is larger than the 12th interval P12 (the interval between the second outer surface 4 and the 7th straight line L7).

[0029] As shown in Figures 1 to 4, the first cut LA is positioned in the plate width direction R between the plate width centerline a (the plate width centerline a in the plate width direction R between the third and fourth lines L3 and L4) and the third line L3. The first cut LA extends from the third line L3 toward the plate width centerline a in the plate width direction R. The first cut LA intersects (is perpendicular to) the third line L3. For example, in the plate length direction U, the first cut LA is positioned parallel to the first line L1 (first outer surface 3). The first cut LA is positioned parallel to the first line L1 and extends from the third line L3 toward the plate width centerline a, having a cut length La.

[0030] As shown in Figures 1 to 4, the second cut LB is positioned between the first cut LA and the first straight line L1 in the length direction U of the plate. The second cut LB is positioned in the length direction U of the plate with a second cut spacing P15 between it and the first cut LA. The second cut LB is positioned in the length direction U of the plate with a third cut spacing P16 between it and the first straight line L1. The second cut spacing P15 is, for example, between 2 / 5 (2 / 5) and 7 / 10 (7 / 10) of the first spacing P1 (the spacing between the first outer surface 3 and the first straight line L1).

[0031] As shown in Figures 1 to 4, the second cut LB is positioned in the plate width direction R between the plate width centerline a and the third line L3. The second cut LB extends from the third line L3 toward the plate width centerline a in the plate width direction R. The second cut LB intersects (is perpendicular to) the third line L3. The second cut LB is positioned, for example, parallel to the first line L1 in the plate length direction U. The second cut LB is positioned parallel to the first line L1 and extends from the third line L3 toward the plate width centerline a with a cut length La (the same cut length as the first cut LA).

[0032] As shown in Figures 1 to 4, the third notch LC is positioned in the plate width direction R between the third straight line L3 and the plate width centerline a, and is positioned with a fourth notch spacing P17 across the plate width centerline a. The third notch LC is positioned parallel to the third straight line L3 in the plate width direction R, with a fifth notch spacing P18 across it. The third notch LC is positioned parallel to the third straight line L3. The fifth notch spacing P18 is a spacing greater than twice the plate thickness of the flat plate 1. For example, the fifth notch spacing P18 is a spacing greater than twice the plate thickness of the flat plate 1 and less than or equal to 10 times.

[0033] As shown in Figures 1 to 4, the third cut LC extends in the length direction U of the plate between the first and second cuts LA and LB, and is formed continuously with the first and second cuts LA and LB.

[0034] As shown in Figures 1 to 4, the fourth notch LD is positioned in the length direction U of the plate between the first outer surface 3 and the first straight line L1. The fourth notch LD is positioned on the first outer surface 3 in the length direction U of the plate, separated by the first notch spacing P14.

[0035] As shown in Figures 1 to 4, the fourth cut LD is positioned in the plate width direction R between the plate width centerline a and the fourth straight line L4. The fourth cut LD extends from the fourth straight line L4 toward the plate width centerline a in the plate width direction R. The fourth cut LD intersects (is perpendicular to) the fourth straight line L4. For example, the fourth cut LD is positioned parallel to the first straight line L1 (first outer surface 3) in the plate width direction R. The fourth cut LD is positioned parallel to the first straight line L1 and extends from the fourth straight line L4 toward the plate width centerline a with a cut length La (the same cut length as the first cut LA).

[0036] As shown in Figures 1 to 4, the fifth cut LE is positioned in the plate length direction U between the fourth cut LD and the first straight line L1. The fifth cut LE is positioned in the plate length direction U with a sixth cut spacing P19 between it and the fourth cut LD. The fifth cut LE is positioned in the plate length direction U with a seventh cut spacing P20 between it and the first straight line L1. The sixth cut spacing P19 is, for example, 2 / 5 (two-fifths) or more and 7 / 10 (seven-tenths) or less of the first spacing P1 (distance between the first outer surface 3 and the first straight line L1). The sixth cut spacing P19 is, for example, the same spacing as the second cut spacing P15 (spacing of the second cut LB), and the seventh cut spacing P20 is, for example, the same spacing as the third cut spacing P16.

[0037] As shown in Figures 1 to 4, the fifth notch LE is positioned in the plate width direction R between the plate width centerline a and the fourth straight line L4. The fifth notch LE extends from the fourth straight line L4 toward the plate width centerline a in the plate width direction R. The fifth notch LE intersects (is perpendicular to) the fourth straight line L4. For example, the fifth notch LE is positioned parallel to the first straight line L1 in the plate length direction U. The fifth notch LE is positioned parallel to the first straight line L1 and extends from the fourth straight line L4 toward the plate width centerline a with a notch length La (the same notch length as the first notch LA).

[0038] As shown in Figures 1 to 4, the sixth cut LF is positioned in the plate width direction R between the fourth straight line L4 and the plate width centerline a, and is positioned with a fourth cut spacing P17 between it and the plate width centerline a. The sixth cut LF is positioned parallel to the fourth straight line L4 in the plate width direction R, with a fifth cut spacing P18 between them. The sixth cut LF is positioned parallel to the fourth straight line L4 in the plate width direction R.

[0039] As shown in Figures 1 to 4, the sixth cut LF extends in the length direction U of the plate between the fourth and fifth cuts LD and LE, and is formed continuously with the fourth and fifth cuts LD and LE.

[0040] As shown in Figures 1 to 6, the plate body 1 has a first plate 11 and a second plate 12.

[0041] As shown in Figures 1 to 5, the first flat plate 11 is divided by a first straight line L1, a first outer surface 3, and third and fourth outer surfaces 5 and 6. The first flat plate 11 is divided by the first straight line L1, the first outer surface 3 and the third outer surface 5 between the first straight line L1, and the fourth outer surface 6 between the first outer surface 3 and the first straight line L1.

[0042] As shown in Figures 1 to 4, the first flat plate 11 has a mounting plate portion 21, a first outer plate portion 22, a second outer plate portion 23, a first leg hole portion 24, a second leg hole portion 25, a first leg plate portion 26, and a second leg plate portion 27.

[0043] As shown in Figures 1 to 4, the mounting plate portion 21 is divided by the first outer surface 3, the first straight line L1, the third straight line L3, the fourth straight line L4, and the first to sixth cutouts LA, LB, LC, LD, LE, LF. The mounting plate portion 21 is divided by the first outer surface 3 between the third and fourth straight lines L3 and L4, the first straight line L1 between the third and fourth straight lines L3 and L4, the third straight line L3, the fourth straight line L4, and the first to sixth cutouts LA, LB, LC, LD, LE, LF.

[0044] As shown in Figures 1 to 4 and Figure 6, each of the notches LA, LB, LC, LD, LE, and LF penetrates the first flat plate 11 (mounting plate portion 21) in the thickness direction T of the first flat plate 11 (mounting plate portion 21) and opens into the plate surface 7 and plate back surface 8 of the first flat plate 11 (mounting plate portion 21).

[0045] As shown in Figures 1 to 4, the first outer plate portion 22 is divided by the first outer surface 3, the first straight line L1, the third straight line L3, and the third outer surface 5. The first outer plate portion 22 is divided by the first outer surface 3 between the third outer surface 5 and the third straight line L3, the first straight line L1 between the third outer surface 5 and the third straight line L3, the third straight line L3, and the third outer surface 5 between the first outer surface 3 and the first straight line L1.

[0046] As shown in Figure 4, the first outer plate portion 22 is arranged in the plate width direction R, continuously from one plate width end α of the mounting plate portion 21 (the one plate width end which is the third straight line L3), and is connected to the mounting plate portion 21. The first outer plate portion 22 is arranged so that its plate surface 7 is flush with the plate surface 7 of the mounting plate portion 21.

[0047] As shown in Figures 1 to 4, the second outer plate portion 23 is demarcated by the first outer surface 3, the first straight line L1, the fourth straight line L4, and the fourth outer surface 6. The second outer plate portion 23 is demarcated by the first outer surface 3 between the fourth straight line L4 and the fourth outer surface 6, the first straight line L1 between the fourth straight line L4 and the fourth outer surface 6, the fourth straight line L4, the first outer surface 3, and the fourth outer surface 6 between the first straight line L1.

[0048] As shown in Figures 1 to 4, the second outer plate portion 23 is positioned in the plate width direction R, separated from the first outer plate portion 22 by an outer plate spacing P6 (sixth spacing P6). The second outer plate portion 23 is positioned between the first outer plate portion 22 and the mounting plate portion 21 in the plate width direction R, and is connected to the mounting plate portion 21. As shown in Figure 4, the second outer plate portion 23 is positioned continuously with the other plate width end β (the other plate width end which is the fourth straight line L4) of the mounting plate portion 21, and is connected to the mounting plate portion 21. The plate surface 7 of the second outer plate portion 23 is positioned flush with the plate surface 7 of the mounting plate portion 21.

[0049] The first leg holes 24 are formed in the mounting plate portion 21 as shown in Figures 1 to 4. The first leg holes 24 are located on one end α (third straight line L3 side) of the mounting plate portion 21 in the plate width direction R. The first leg holes 24 are located adjacent to the first outer plate portion 22 (third straight line L3) in the plate width direction R, on one end α (third straight line L3 side) of the mounting plate portion 21. The first leg holes 24 are located between the third straight line L3 (one end α of the mounting plate portion 21) and the plate width centerline a (the plate width centerline between each end α, β of the mounting plate portion 21) in the plate width direction R. The first leg holes 24 are located on the plate width centerline a with a first leg hole spacing P17 (fourth cut spacing P17) in the plate width direction R. The first leg hole 24 is demarcated by the first to third cuts LA, LB, LC and the third straight line L3 (the third straight line L3 between the first and second cuts LA, LB).

[0050] As shown in Figure 4, the first leg hole portion 24 has a hole width Hα (the same hole width as the fifth notch spacing P18) in the plate width direction R, extending from the third straight line L3 (one plate width end α of the mounting plate portion 21) toward the plate width centerline a. The hole width Hα of the first leg hole portion 24 is a hole width that exceeds twice the plate thickness of the flat plate body 1 (first flat plate 11) in the plate width direction R. For example, the hole width Hα is a hole width that is greater than twice the plate thickness of the flat plate body 1 but not more than 10 times.

[0051] As shown in Figure 4, the first leg hole portion 24 is positioned in the plate length direction U with a second leg hole spacing P14 (first notch spacing P14) on the first outer surface 3 (one plate length end γ of the mounting plate portion 21). The first leg hole portion 24 is positioned in the plate length direction U with a third leg hole spacing P16 (third notch spacing P16) on the first straight line L1 (the other plate length end τ of the mounting plate portion 21). The first leg hole portion 24 has a hole length Lα in the plate length direction U. The hole length Lα of the first leg hole portion 24 is, for example, a hole length of 2 / 5 (2 / 5) or more and 7 / 10 (7 / 10) or less of the plate length (first spacing P1) of the mounting plate portion 21 in the plate length direction U.

[0052] As shown in Figures 1 to 4, the first leg hole portion 24 penetrates the mounting plate portion 21 (first flat plate 11) in the plate thickness direction T and opens to the plate surface 7 and plate back surface 8 of the mounting plate portion 21 (first flat plate 11).

[0053] The second leg hole portion 25 is formed in the mounting plate portion 21 as shown in Figures 1 to 4. The second leg hole portion 25 is located on the other end β (fourth straight line L4 side) of the mounting plate portion 21, separated from the first leg hole portion 24 by a leg hole arrangement interval F1 in the plate width direction R. The second leg hole portion 25 is located adjacent to the second outer plate portion 23 (fourth straight line L4) and on the other end β (fourth straight line L4 side) of the mounting plate portion 21, in the plate width direction R. The second leg hole portion 25 is located between the fourth straight line L4 (the other end β of the mounting plate portion 21) and the plate width centerline a in the plate width direction R. The second leg hole portion 25 is located separated from the plate width centerline a by a first leg hole interval P17 (fourth cut interval P17) in the plate width direction R. The second leg hole 25 is demarcated by the fourth to sixth cuts LD, LE, LF and the fourth straight line L4 (the fourth straight line L4 between the fourth and fifth cuts LD, LE).

[0054] As shown in Figure 4, the second leg hole portion 25 has a hole width Hβ in the plate width direction R, extending from the fourth straight line L4 (the other plate width end β of the mounting plate portion 21) toward the plate width centerline a. The hole width Hβ of the second leg hole portion 25 is, for example, the same as the hole width Hα of the first leg hole portion 24. The hole width Hβ of the first leg hole portion 24 is a hole width that exceeds twice the plate thickness of the flat plate body 1 (first flat plate 11) in the plate width direction R. For example, the hole width Hβ is a hole width that is greater than twice the plate thickness of the flat plate body 1 but not more than 10 times.

[0055] As shown in Figure 4, the second leg hole portion 25 is positioned in the plate length direction U with a second leg hole spacing P14 (first notch spacing P14) on the first outer surface 3 (one end γ of the mounting plate portion 21). The second leg hole portion 25 is positioned in the plate length direction U with a fourth leg hole spacing P20 (seventh notch spacing P20) on the first straight line L1 (the other end τ of the mounting plate portion 21). The fourth leg hole spacing P20 is, for example, the same spacing as the third leg hole spacing P16. The second leg hole portion 25 has a hole length Lβ in the plate length direction U. The hole length Lβ of the second leg hole portion 25 is, for example, a hole length of 2 / 5 (2 / 5) or more and 7 / 10 (7 / 10) or less of the plate length (first spacing P1) of the mounting plate portion 21 in the plate length direction U. The hole length Lβ of the second leg hole 25 is, for example, the same as the hole length Lα of the first leg hole 24.

[0056] As shown in Figures 1 to 4, the second leg hole portion 25 penetrates the mounting plate portion 21 (first flat plate 11) in the plate thickness direction T and opens to the plate surface 7 and plate back surface 8 of the mounting plate portion 21 (first flat plate 11).

[0057] As shown in Figures 1 to 4, the first leg plate portion 26 is divided in the plate width direction R by a first cut LA, a second cut LB, and a third cut LC, which are continuous with the first outer plate portion 22.

[0058] As shown in Figures 1 to 4, the first leg plate portion 26 is connected to the first outer plate portion 22 in the plate width direction R. The first leg plate portion 26 protrudes from the first outer plate portion 22 into the first leg hole portion 24 in the plate width direction. The first leg plate portion 26 is positioned so that its plate surface 7 is flush with the plate surface 7 of the first outer plate portion 22.

[0059] As shown in Figure 4, the first leg plate portion 26 is positioned in the plate width direction R, separated from the plate width centerline a by the first leg plate spacing P17 (fourth notch spacing P17). The first leg plate portion 26 is positioned in the plate width direction R between the first outer plate portion 22 (third straight line L3) and the plate width centerline a. In the plate width direction R, the first leg plate portion 26 protrudes from the first outer plate portion 22 (third straight line L3) toward the plate width centerline a into the first leg hole portion 24, having a leg plate width Hγ. The leg plate width Hγ of the first leg plate portion 26 is a hole width that exceeds twice the plate thickness of the flat plate body 1 (first flat plate 11) in the plate width direction R. For example, the leg plate width Hγ is a leg plate width that is greater than twice the plate thickness of the flat plate body 1 and less than or equal to 10 times the plate thickness. The first leg plate portion 26 has a plate width end face 26A at the end that protrudes from the third straight line L3 (first outer plate portion 22) in the plate width direction R.

[0060] As shown in Figure 4, the first leg plate portion 26 is positioned in the plate length direction U with a second leg plate spacing P14 (first notch spacing P14) between it and the first outer surface 3 (one end γ of the mounting plate portion 21). The first leg plate portion 26 is positioned in the plate length direction U with a third leg plate spacing P16 (third notch spacing P16) between it and the first straight line L1 (the other end τ of the mounting plate portion 21). The first leg plate portion 26 has a leg plate length Lγ in the plate length direction U. The leg plate length Lγ of the first leg plate portion 26 is, for example, a hole length in the plate length direction U that is between 2 / 5 (2 / 5) and 7 / 10 (7 / 10) of the plate length (first spacing P1) of the mounting plate portion 21.

[0061] As shown in Figures 1 to 4, the second leg plate portion 27 is divided in the plate width direction R by the fourth cut LD, the fifth cut LE, and the sixth cut LF, which are continuous with the second outer plate portion 23.

[0062] As shown in Figures 1 to 4, the second leg plate portion 27 is connected to the second outer plate portion 23 in the plate width direction R. The second leg plate portion 27 protrudes from the second outer plate portion 23 into the second leg hole portion 25 in the plate width direction. The second leg plate portion 27 is positioned so that its plate surface 7 is flush with the plate surface 7 of the second outer plate portion 23.

[0063] As shown in Figure 4, the second leg plate portion 27 is positioned in the plate width direction R, separated from the plate width centerline a by the first leg plate spacing P17. The second leg plate portion 27 is positioned in the plate width direction R, separated from the first leg plate portion 26 by the leg plate spacing F1 (leg hole spacing F1). The second leg plate portion 27 is positioned in the plate width direction R, between the second outer plate portion 23 (fourth straight line L4) and the plate width centerline a. In the plate width direction R, the second leg plate portion 27 protrudes from the second outer plate portion 23 (fourth straight line L4) toward the plate width centerline a, having a leg plate width Hτ, into the second leg hole portion 25. The leg plate width Hτ of the second leg plate portion 27 is the same as the leg plate width Hγ of the first leg plate portion 26. The second leg plate portion 27 has a plate width end face 27A at the end that protrudes from the fourth straight line L4 (second outer plate portion 23) in the plate width direction R.

[0064] As shown in Figure 4, the second leg plate portion 27 is positioned in the plate length direction U with a second leg plate spacing P14 (the same spacing as the first leg plate portion 26) on the first outer surface 3 (one end γ of the mounting plate portion 21). The second leg plate portion 27 is positioned in the plate length direction U with a fourth leg plate spacing P20 (seventh notch spacing P20) on the first straight line L1 (the other end τ of the mounting plate portion 21). The second leg plate portion 27 has a leg plate length Lτ in the plate length direction U. The leg plate length Lτ of the second leg plate portion 27 is, for example, a hole length of 2 / 5 (2 / 5) or more and 7 / 10 (7 / 10) or less of the plate length (first spacing P1) of the mounting plate portion 21 in the plate length direction U. The leg length Lτ of the second leg plate section 27 is, for example, the same leg length as the leg length Lγ of the first leg plate section 26. The fourth leg plate spacing P20 is, for example, the same spacing as the third leg plate spacing P16.

[0065] The second flat plate 12 is divided by a first straight line L1, a second outer surface 4, and third and fourth outer surfaces 5 and 6, as shown in Figures 1 to 3 and Figure 5. The second flat plate 12 is divided by a first straight line L1, a second outer surface 4, a third outer surface 5 between the first straight line L1 and the second outer surface 4, and a fourth outer surface 6 between the first straight line L1 and the second outer surface 4.

[0066] As shown in Figures 1 to 3 and Figure 5, the second flat plate 12 has a first inner plate portion 31, a second inner plate portion 32, a first side plate portion 33, a second side plate portion 34, a folded plate portion 35, a packaging window hole 36, a first sheet pressing plate portion 37, and a second sheet pressing plate portion 38.

[0067] The first inner plate portion 31 is demarcated by a first straight line L1, a second straight line L2, a fifth straight line L5, and a third outer surface 5, as shown in Figures 1 to 3 and Figure 5. The first inner plate portion 31 is demarcated by a first straight line L1 between the third outer surface 5 and the fifth straight line L5, a second straight line L2 between the third outer surface 5 and the fifth straight line L5, a fifth straight line L5 between the first and second straight lines L1 and L2, and a third outer surface 5 between the first and second straight lines L1 and L2.

[0068] As shown in Figures 1 to 3 and Figure 5, the first inner plate portion 31 is connected to the first outer plate portion 22 in the plate length direction U. The first inner plate portion 31 is arranged in a continuous manner with one plate length end ε (one plate length end which is the first straight line L1) of the first outer plate portion 22 in the plate length direction U, and is connected to the first outer plate portion 22. The plate surface 7 of the first inner plate portion 31 is arranged to be flush with the plate surface 7 of the first outer plate portion 22.

[0069] The second inner plate portion 32 is demarcated by the first straight line L1, the second straight line L2, the sixth straight line L6, and the fourth outer surface 6, as shown in Figures 1 to 3 and Figure 5. The second inner plate portion 32 is demarcated by the first straight line L1 between the sixth straight line L6 and the fourth outer surface 6, the second straight line L2 between the sixth straight line L6 and the fourth outer surface 6, the sixth straight line L6 between the first and second straight lines L1 and L2, and the fourth outer surface 6 between the first and second straight lines L1 and L2.

[0070] As shown in Figures 1 to 3 and Figure 5, the second inner plate portion 32 is positioned opposite the first inner plate portion 31 in the plate width direction R, separated by an inner plate spacing P11 (11th spacing P11). The second inner plate portion 32 is positioned opposite the first inner plate portion 31 in the plate width direction R. The second inner plate portion 32 is connected to the second outer plate portion 23 in the plate length direction U. The second inner plate portion 32 is positioned continuously with one plate length end σ (one plate length end which is the first straight line L1) of the second outer plate portion 23 in the plate length direction U, and is connected to the second outer plate portion 23. The plate surface 7 of the second inner plate portion 32 is positioned flush with the plate surface 7 of the second outer plate portion 23.

[0071] The first side plate portion 33 is demarcated by the fifth straight line L5, the seventh straight line L7, and the third outer surface 5, as shown in Figures 1 to 3 and Figure 5. The first side plate portion 33 is demarcated by the fifth straight line L5 between the seventh straight line L7 and the third outer surface 5, the seventh straight line L7 between the third outer surface 5 and the fifth straight line L5, and the third outer surface 5 between the fifth and seventh straight lines L5 and L7.

[0072] As shown in Figure 5, the first side plate portion 33 is positioned in the length direction U of the plate with a first side plate spacing G2 between it and the first outer plate portion 22. The side plate spacing G2 is the sum of the third spacing P3 and the thirteenth spacing P13. In the length direction U of the plate, the first side plate portion 33 is connected to the first inner plate portion 31, with the first inner plate portion 31 positioned between it and the first outer plate portion 22. The first side plate portion 33 is positioned so that its plate surface 7 is flush with the plate surface 7 of the first inner plate portion 31.

[0073] The second side plate portion 34 is demarcated by the sixth straight line L6, the seventh straight line L7, and the fourth outer surface 6, as shown in Figures 1 to 3 and Figure 5. The second side plate portion 34 is demarcated by the sixth straight line L6 between the seventh straight line L7 and the fourth outer surface 6, the seventh straight line L7 between the sixth straight line L6 and the fourth outer surface 6, and the fourth outer surface 6 between the sixth and seventh straight lines L6 and L7.

[0074] As shown in Figure 5, the second side plate portion 34 is positioned in the length direction U of the plate with a first side plate spacing G2 between it and the second outer plate portion 23. In the length direction U of the plate, the second side plate portion 34 is connected to the first inner plate portion 31 with the second inner plate portion 32 positioned between it and the second outer plate portion 23. In the width direction R of the plate, the second side plate portion 34 is positioned opposite the first side plate portion 33 with a second side plate spacing P11 (11th spacing P11) between them. In the width direction R of the plate, the second side plate portion 34 is positioned opposite the first side plate portion 33. The plate surface 7 of the second side plate portion 34 is positioned flush with the plate surface 7 of the second inner plate portion 32.

[0075] The folded plate portion 35 is demarcated by the fifth and sixth straight lines L5, L6, the seventh straight line L7, and the second outer surface 4, as shown in Figures 1 to 3 and Figure 5. The folded plate portion 35 is demarcated by the fifth straight line L5 between the seventh straight line L7 and the second outer surface 4, the sixth straight line L6 between the seventh straight line L7 and the second outer surface 4, the seventh straight line L7 between the fifth and sixth straight lines L5, L6, and the second outer surface 4 between the fifth and sixth straight lines L5, L6.

[0076] As shown in Figure 5, the folded plate portion 35 is positioned in the length direction U of the plate, between the mounting plate portion 21 (first and second outer plate portions 22, 23) with a folded plate spacing G2 (first side plate spacing G2) in between. In the width direction R of the plate, the folded plate portion 35 is positioned between the first and second side plate portions 33, 34 and connected to the first and second side plate portions 33, 34. The folded plate portion 35 is positioned so that its plate surface 7 is flush with the plate surfaces 7 of the first and second side plate portions 33, 34.

[0077] As shown in Figures 1 to 3 and Figure 5, the packaging window opening 36 is demarcated by the first straight line L1, the fifth straight line L5, the sixth straight line L6, and the seventh straight line L7, and in the plate thickness direction T, it penetrates the second flat plate 12 and opens into the plate surface 7 and plate back surface 8 of the second flat plate 12. The packaging window opening 36 is demarcated by the first straight line L1 between the fifth and sixth straight lines L5, L6, the fifth straight line L5 between the first and seventh straight lines L1, L7, the sixth straight line L6 between the first and seventh straight lines L1, L7, and the seventh straight line L7 between the fifth and sixth straight lines L5, L6.

[0078] As shown in Figures 1 to 3 and Figure 5, the packaging window opening 36 is partitioned by the mounting plate portion 21, the first and second inner plate portions 31 and 32, and the folded plate portion 35.

[0079] As shown in Figures 1 to 3 and Figure 5, the first sheet retaining plate portion 37 is positioned so that its plate surface 7 is flush with the plate surface 7 of the first inner plate portion 31. The first sheet retaining plate portion 37 is positioned between the first straight line L1 and the seventh straight line L7 in the plate length direction U. The first sheet retaining plate portion 37 is positioned between the mounting plate portion 21 and the folded plate portion 35 in the plate length direction U. The first sheet retaining plate portion 37 is positioned with a first retaining plate spacing P21 between the first straight line L1 (the other plate length end τ of the mounting plate portion 21) in the plate length direction U. The first sheet retaining plate portion 37 is positioned with a second retaining plate spacing P22 between the seventh straight line L7 (folded plate portion 35) in the plate length direction U. The first sheet retaining plate portion 37 is connected to the first inner plate portion 31. The first press plate spacing P21 is, for example, larger than the first notch spacing P14 (second leg hole spacing P14). The first sheet press plate portion 37 has a press plate length Lδ in the plate length direction U, as shown in Figure 5. The press plate length Lδ of the first sheet press plate portion 37 is, for example, 1 / 3 (one-third) of the side plate spacing G2. The press plate length Lδ of the first sheet press plate portion 37 is shorter than the hole length Lα (second notch spacing P15) of the first leg hole portion 24.

[0080] As shown in Figures 1 to 3 and Figure 5, the first sheet pressing plate portion 37 is positioned between the fifth straight line L5 and the center line a of the sheet width in the sheet width direction R. The first sheet pressing plate portion 37 is positioned between the first inner sheet portion 31 and the center line a of the sheet width in the sheet width direction R. The first sheet pressing plate portion 37 protrudes from the fifth straight line L5 (first inner sheet portion 31) into the packaging window hole 36 in the sheet width direction R. The first sheet pressing plate portion 37 protrudes from the fifth straight line L5 (first inner sheet portion 31) into the packaging window hole 36 in the sheet width direction R, having a pressing plate width Hδ. The pressing plate width Hδ of the first sheet pressing plate portion 37 is shorter than the hole width Hα of the first leg hole portion 24 and shorter than the leg plate width Hγ of the first leg plate portion 26. The first sheet-holding plate portion 37 has a plate width end face 37A at the end that protrudes from the fifth straight line L5 (first inner plate portion 31) in the plate width direction R.

[0081] As shown in Figures 1 to 3 and Figure 5, the second sheet retaining plate portion 38 is positioned so that its plate surface 7 is flush with the plate surface 7 of the second inner plate portion 32. The second sheet retaining plate portion 38 is positioned between the first straight line L1 and the seventh straight line L7 in the plate length direction U. The second sheet retaining plate portion 38 is positioned between the mounting plate portion 21 and the folded plate portion 35 in the plate length direction U. The second sheet retaining plate portion 38 is positioned with a third retaining plate spacing P23 between the first straight line L1 (the other plate length end τ of the mounting plate portion 21) in the plate length direction U. The second sheet retaining plate portion 38 is positioned with a fourth retaining plate spacing P24 between the seventh straight line L7 (folded plate portion 35) in the plate length direction U. The second sheet retaining plate portion 38 is connected to the second inner plate portion 32. The third press plate spacing P23 is, for example, the same spacing as the first press plate spacing P21. The second sheet press plate section 38 has a press plate length Lε in the plate length direction U. The press plate length Lε of the second sheet press plate section 38 is 1 / 3 (one-third) the length of the side plate spacing G2. The press plate length Lε of the second sheet press plate section 38 is a plate length shorter than the hole length Lβ of the second leg hole section 25, and is, for example, the same plate length as the press plate length Lδ of the first sheet press plate section 37.

[0082] As shown in Figures 1 to 3 and Figure 5, the second sheet retaining plate portion 38 is positioned between the sixth straight line L6 and the center line a of the sheet width in the sheet width direction R. The second sheet retaining plate portion 38 is positioned between the second inner plate portion 32 and the center line a of the sheet width in the sheet width direction R. The second sheet retaining plate portion 38 has a retaining plate width Hε in the sheet width direction R. In the sheet width direction R, the second sheet retaining plate portion 38 protrudes from the sixth straight line L6 (second inner plate portion 32) to the packaging window hole 36, separated from the first sheet retaining plate portion 37 by a sheet retaining plate spacing G3. In the sheet width direction R, the second sheet retaining plate portion 38 protrudes from the sixth straight line L6 (second inner plate portion 32) to the packaging window hole 36, having a retaining plate width Hε. The pressing plate width Hε of the first sheet pressing plate portion 37 is shorter than the hole width Hβ of the second leg hole portion 25 and shorter than the leg plate width Hτ of the second leg plate portion 27, and is, for example, the same as the pressing plate width Hδ of the first sheet pressing plate portion 37. The second sheet pressing plate portion 38 has a plate width end face 38A at the end that protrudes from the sixth straight line L6 (second inner plate portion 32) in the plate width direction R.

[0083] As shown in Figures 1 to 5, the retaining sheet 2 covers the packaging window hole 36 and is placed (laminated) on the plate surface 7 of the flat plate body 1 (first and second flat plates 12) and fixed to the folded plate portion 35 and the mounting plate portion 21.

[0084] As shown in Figures 1 to 5, the retaining sheet 2 is placed (laminated) on the surface 7 of the mounting plate portion 21, the surface 7 of the first and second outer plate portions 22 and 23, and the surface 7 of the first and second leg plate portions 26 and 27. The retaining sheet 2 covers the packaging window hole 36 and is placed (laminated) on the surface 7 of the first and second inner plate portions 31 and 32, the surface 7 of the first and second side plate portions 33 and 34, the surface 7 of the folded plate portion 35, and the surface 7 of the first and second retaining sheet plate portions.

[0085] The retaining sheet 2 is fixed to the folded plate portion 35 (the plate surface 7 of the folded plate portion 35) as shown in Figures 1 to 5. The retaining sheet 2 is fixed to the folded plate portion 35 in the plate width direction R, between the fifth and sixth straight lines L5 and L6 (between the first and second side plate portions 33 and 34). The retaining sheet 2 is fixed to the first and second side plate portions 33 and 34.

[0086] The retaining sheet 2 is fixed to the first and second inner plate portions 31 and 32 (the plate surfaces 7 of the first and second inner plate portions 31 and 32) as shown in Figures 1 to 5. The retaining sheet 2 is fixed to the first and second inner plate portions 31 and 32 (the plate surfaces 7 of the first and second inner plate portions 31 and 32) in the length direction U of the plate, between the first and second straight lines L1 and L2 (between the first side plate portion 33 and the first outer plate portion 22, and between the second side plate portion 34 and the second outer plate portion 23).

[0087] As shown in Figures 1 to 5, the retaining sheet 2 is fixed to the mounting plate portion 21 (the plate surface 7 of the mounting plate portion 21). For example, in the plate length direction U, the retaining sheet 2 is fixed to the mounting plate portion 21 on the side of the packaging window hole 36. In the plate length direction L, the retaining sheet 2 is fixed to the mounting plate portion 21 on the side of the first side plate surface 3. In the plate width direction R, the retaining sheet 2 is fixed to the mounting plate portion 21 on the side of the packaging window hole 36, spanning between the third and fourth straight lines L3, L4 (between the first and second outer plate portions 22, 23). In the plate width direction R, the retaining sheet 2 is fixed to the mounting plate portion 21 on the first outer surface 3 side (one plate length end γ side of the mounting plate portion 21), spanning between the third and fourth straight lines L3, L4 (between the first and second outer plate portions 22, 23).

[0088] The retaining sheet 2 is fixed to the first and second outer plate portions 22, 23 (the plate surfaces 7 of the first and second outer plate portions 22, 23) as shown in Figures 1 to 5. The retaining sheet 2 is fixed to the first and second outer plate portions 22, 23 on the side of the packaging window hole 36 (the other end τ of the mounting plate portion 21) in the length direction U of the plate. The retaining sheet 2 is fixed to the first outer surface 3 side (the one end γ of the mounting plate portion 21) in the length direction U of the plate.

[0089] The retaining sheet 2 is formed from a sheet material (film material) that has elasticity (flexibility). The retaining sheet 2 is, for example, a transparent sheet (transparent film) formed from a polyurethane thermoplastic resin. The thickness of the retaining sheet 2 (transparent sheet material) is 10 to 300 μm (micrometers). When a transparent sheet (transparent film) of polyurethane thermoplastic resin is used for the retaining sheet 2, the retaining sheet 2 can cover the packaging window hole 36 and be fixed (attached) to the surface 7 of the mounting plate portion 21, the surface 7 of the first and second outer plate portions 22, 23, the surface 7 of the first and second leg plate portions 26, 27, the surface 7 of the first and second inner plate portions 31, 32, the surface 7 of the first and second side plate portions 33, 34, and the surface 7 of the folded plate portion 35 by heat sealing (thermal compression).

[0090] As shown in Figures 1 to 5, the retaining sheet 2 has, for example, a first sheet portion 2A and a second sheet portion 2B.

[0091] As shown in Figures 1 to 5, the first sheet portion 2A covers the packaging window opening 36 and is placed (laminated) on the surface 7 of the first and second inner plate portions 31, 32, the surface 7 of the first and second side plate portions 33, 34, the surface 7 of the folded plate portion 35, and the surface 7 of the first and second press-fit sheet plate portions 37, 38, and is positioned (laminated) on the surface 7 of the mounting plate portion 21 on the packaging window opening 36 side, and the surface 7 of the first and second outer plate portions 22, 23 on the packaging window opening 36 side.

[0092] The first sheet portion 2A is fixed to the folded plate portion 35 (the plate surface 7 of the folded plate portion 35) as shown in Figures 1 to 5. The first sheet portion 2A is fixed to the folded plate portion 35 in the plate width direction R, between the fifth and sixth straight lines L5 and L6 (between the first and second side plate portions 33 and 34). The first sheet portion 2A is fixed to the first and second side plate portions 33 and 34.

[0093] As shown in Figures 1 to 5, the first sheet portion 2A is fixed to the first and second inner plate portions 31 and 32 (the plate surfaces 7 of the first and second inner plate portions 31 and 32). In the length direction U of the plate, the first sheet portion 2A is fixed to the first and second inner plate portions 31 and 32 (the plate surfaces 7 of the first and second inner plate portions 31 and 32) between the first and second straight lines L1 and L2 (between the first side plate portion 33 and the first outer plate portion 22, and between the second side plate portion 34 and the second outer plate portion 23).

[0094] As shown in Figures 1 to 5, the first sheet portion 2A is fixed, for example, in the length direction U of the board to the mounting plate portion 21 on the side of the packaging window hole 36 (the surface 7 of the mounting plate portion 21 on the side of the packaging window hole 36). In the width direction R of the board, the first sheet portion 2A is fixed to the mounting plate portion 21 on the side of the packaging window hole 36, spanning between the third and fourth straight lines L3 and L4 (between the first and second outer board portions 22 and 23).

[0095] As shown in Figures 1 to 5, the first sheet portion 2A is fixed in the length direction U of the plate to the first and second outer plate portions 22 and 23 on the side of the packaging window hole 36 (the plate surface 7 of the first and second outer plate portions 22 and 23 on the side of the packaging window hole 36).

[0096] As shown in Figures 1 to 5, the second sheet portion 2B is formed integrally with the first sheet portion 2A, for example, in the length direction U of the plate. The second sheet portion 2B is positioned in the length direction U of the plate between the first sheet portion 2A and the first outer surface 3 of the mounting plate portion 21 (one end γ of the length of the mounting plate portion 21). The second sheet portion 2B is positioned (placed) on the plate surface 7 of the mounting plate portion 21 between the first sheet portion 2A and the first outer surface 3, the plate surface 7 of the first and second leg plate portions 26, 27, and the plate surface 7 of the first and second outer plate portions 22, 23 between the first sheet portion 2A and the first outer surface 3 of the mounting plate portion 21. The second sheet portion 2B is positioned (laminated) on the entire plate surface 7 of the mounting plate portion 21 between the first sheet portion 2A and the first outer surface 3 (the first outer surface 3 of the mounting plate portion 21).

[0097] The second sheet portion 2B is fixed to the mounting plate portion 21 (the plate surface 7 of the mounting plate portion 21) as shown in Figures 1 to 5. The second sheet portion 2B is fixed to the mounting plate portion 21 on the side of the packaging window hole 56 (the surface 7 of the mounting plate portion 21 on the side of the packaging window hole 36) in the length direction U of the plate. The second sheet portion 2B is fixed to the mounting plate portion 21 on the side of the first side plate surface 3 (the other end τ of the mounting plate portion 21) in the length direction L of the plate. The second sheet portion 2B is fixed to the mounting plate portion 21 on the side of the packaging window hole 36, spanning between the third and fourth straight lines L3 and L4 (between the first and second outer plate portions 22 and 23) in the width direction R of the plate. The second sheet portion 2B is fixed to the mounting plate portion 21 on the first outer surface 3 side (one end γ of the mounting plate portion 21) in the plate width direction R, between the third and fourth straight lines L3 and L4 (between the first and second outer plate portions 22 and 23).

[0098] As shown in Figures 1 to 5, the second sheet portion 2B is fixed to the first and second outer plate portions 22 and 23 on the packaging window hole 36 side in the length direction U of the plate. The second sheet portion 2B is fixed to the first and second outer plate portions 22 and 23 on the first outer surface 3 side in the length direction U of the plate.

[0099] Next, the procedure for assembling the packing cushioning material X1 and packing the item to be packed Z (article / product) (assembly and packing method) will be explained with reference to Figures 7 to 16.

[0100] With the unfolded packing cushioning material X1, the object to be packed Z is placed (stacked) on the plate surface 7 of the mounting plate section 21 (see Figure 7).

[0101] As shown in Figure 7, the packaged object Z is placed on the surface 7 of the mounting plate 21 with a gap in the third straight line L3 (first outer plate portion 22) and a gap in the fourth straight line L4 (second outer plate portion 23). The packaged object Z is placed (stacked) on the surface 7 of the mounting plate 21 between the third and sixth cutouts LC and LF (between the first and second leg holes 24 and 25) in the plate width direction R.

[0102] As shown in Figure 7, the object to be packaged Z is placed (stacked) on the retaining sheet 2 (second sheet portion 2B) which is positioned on the surface 7 of the mounting plate portion 21. The object to be packaged Z is placed on the surface 7 of the mounting plate portion 21 with the retaining sheet 2 (second sheet portion 2B) positioned between the surface 7 of the mounting plate portion 21 and the surface 7 of the mounting plate portion 21.

[0103] The object to be packaged Z is placed (stacked) on the retaining sheet 2 (second sheet portion 2B) positioned on the surface 7 of the mounting plate portion 21. The friction (frictional force) between the object and the retaining sheet 2 (second sheet portion 2B), which is made of polyurethane thermoplastic resin, suppresses the movement of the mounting plate portion 21 relative to the surface 7 (second sheet portion 2B), and the object is held on the surface 7 of the mounting plate portion 21 by the retaining sheet 2 (second sheet portion 2B).

[0104] Next, in Figure 8, the second flat plate 12 is folded back along the first straight line L1 to the surface 7 of the first flat plate 11. The second flat plate 12 is folded back to the surface 7 of the first flat plate 11, and is folded back along the first straight line L1 to the surface 7 of the first flat plate 11.

[0105] As shown in Figure 8, the second flat plate 12 is folded back onto the first flat plate 11, so that the pressing sheet 2 (first sheet portion 2A) inside the packaging window 36 covers the object to be packaged Z placed on the surface 7 of the mounting plate portion 21, and presses the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 against the object to be packaged Z.

[0106] As shown in Figure 8, the pressing sheet 2 (first sheet portion 2A) inside the packaging window 36 covers the object to be packaged Z placed on the plate surface 7 (second sheet portion 2B) of the mounting plate portion 21 by the folding of the second flat plate 12, and is pressed against the object to be packaged Z.

[0107] As shown in Figure 8, the object to be packaged Z, placed on the mounting plate portion 21 (second sheet portion 2B), is positioned inside the packaging window hole 36 by the folding of the second flat plate 12, covered by the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36, and pressed against the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36.

[0108] As shown in Figure 8, the first inner plate portion 31 is folded back to the surface 7 of the first outer plate portion 22 by the folding of the second flat plate 12 back to the first flat plate 11 (the surface 7 of the first flat plate 11). The first inner plate portion 31 is folded back to the surface 7 of the first outer plate portion 22. The first inner plate portion 31 is folded back to the surface 7 of the first outer plate portion 22 along the first straight line L1.

[0109] As shown in Figure 8, the first inner plate portion 31 is folded over the first outer plate portion 22 and positioned on top of the first outer plate portion 22 (plate surface 7).

[0110] As shown in Figure 8, the second inner plate portion 32 is folded back onto the plate surface 7 of the second outer plate portion 23 by the folding of the second flat plate 12 onto the first flat plate 11 (plate surface 7 of the first flat plate 11). The second inner plate portion 32 is folded back onto the plate surface 7 of the second outer plate portion 23. The second inner plate portion 32 is folded back onto the plate surface 7 of the second outer plate portion 23 along the first straight line L1.

[0111] As shown in Figure 8, the second inner plate portion 32 is folded over the second outer plate portion 23 and positioned on top of the second outer plate portion 23 (plate surface 7).

[0112] As shown in Figure 8, the first and second side plate portions 33 and 34 are arranged to protrude from the first outer surface 3 (one end γ of the mounting plate portion 21) of the mounting plate portion 21 in the length direction U of the plate, due to the folding of the second flat plate 12 over the plate surface 7 of the first flat plate 11.

[0113] As shown in Figure 8, the folded plate portion 35 is positioned to protrude from the first outer surface 3 (one end γ of the mounting plate portion 21) of the mounting plate portion 21 in the plate length direction U, due to the folding of the second flat plate 12 onto the plate surface 7 of the first flat plate 11.

[0114] As shown in Figure 8, the first sheet retaining plate portion 37 is positioned inside the first leg hole portion 24 by folding the first inner plate portion 31 back onto the first outer plate portion 22, and is superimposed on the first leg plate portion 26. The first sheet retaining plate portion 37 is positioned (placed) between the plate surface 7 of the first sheet retaining plate portion 37 and the plate surface 7 (second sheet portion 2B) of the first leg plate portion 26 (mounting plate portion 21), and is superimposed on the first leg plate portion 26.

[0115] As shown in Figure 8, the first sheet-holding plate portion 37 is positioned between the object to be packaged Z placed on the mounting plate portion 21 and the fifth straight line L5 (first inner plate portion 31) in the plate width direction R, by folding the first inner plate portion 31 back onto the first outer plate portion 22.

[0116] As shown in Figure 8, the second sheet retaining plate portion 38 is positioned inside the second leg hole portion 25 by folding the second inner plate portion 32 back onto the second outer plate portion 23, and is superimposed on the second leg plate portion 27. The second sheet retaining plate portion 38 is positioned (placed) between the plate surface 7 of the second sheet retaining plate portion 38 and the plate surface 7 (second sheet portion 2B) of the second leg plate portion 27 (mounting plate portion 21), and is superimposed on the second leg plate portion 27.

[0117] As shown in Figure 8, the second sheet-holding plate portion 38 is positioned between the object to be packaged Z placed on the mounting plate portion 21 (second sheet portion 2B) and the sixth straight line L6 (second inner plate portion 32) by folding the second inner plate portion 32 back onto the second outer plate portion 23.

[0118] Next, as shown in Figures 9 and 10, the first side plate portions 33 and 34 are folded back to the back surfaces 8 of the first and second outer plate portions 22 and 23, and the folded plate portion 35 is folded back to the back surface 8 of the mounting plate portion 21.

[0119] As shown in Figures 9 and 10, the first side plate portion 33 is folded back against the back surface 8 of the first outer plate portion 22 and comes into contact with the back surface 8 of the first outer plate portion 22. The first side plate portion 33 is folded back against the back surface 8 of the first outer plate portion 22 along the second and seventh straight lines L2 and L7 and comes into contact with the back surface 8 of the first outer plate portion 22.

[0120] As shown in Figure 10, the first side plate portion 33 is folded back in the length direction U of the plate to the back surface 8 of the first outer plate portion 22 between the first outer surface 3 (one end γ of the mounting plate portion 21) and the first leg plate portion 26 (first leg hole portion 24 / first cutout LA).

[0121] As shown in Figures 9 and 10, the first side plate portion 33 is folded back onto the first outer plate portion 22 and positioned on top of the back surface 8 of the first outer plate portion 22.

[0122] With the first inner plate portion 31 and the first side plate portion 33 folded back to the back surface 8 of the first outer plate portion 22, the first outer plate portion 22 is sandwiched between the first side plate portion 33 and the first inner plate portion 31 in the plate thickness direction T, as shown in Figures 9 and 10, and is positioned between the first side plate portion 33 and the first inner plate portion 31.

[0123] As shown in Figures 9 and 10, the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31 are arranged to overlap in the plate thickness direction T when the first inner plate portion 31 and the first side plate portion 33 are folded back onto the first outer plate portion 22, and are stacked in the order of the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31.

[0124] As shown in Figures 9 and 10, the second side plate portion 34 is folded back against the back surface 8 of the second outer plate portion 23 and comes into contact with the back surface 8 of the second outer plate portion 23. The second side plate portion 34 is folded back against the back surface 8 of the second outer plate portion 23 along the second and seventh straight lines L2 and L7 and comes into contact with the back surface 8 of the second outer plate portion 23.

[0125] As shown in Figure 10, the second side plate portion 34 is folded back in the length direction U of the plate to the back surface 8 of the second outer plate portion 23 between the first outer surface 3 (one end γ of the mounting plate portion 21) and the second leg plate portion 27 (second leg hole portion 25 / fourth notch LD).

[0126] As shown in Figures 9 and 10, the second side plate portion 34 is folded over onto the second outer plate portion 23 and positioned on top of the back surface 8 of the second outer plate portion 23.

[0127] With the second inner plate portion 32 and the second side plate portion 34 folded back to the back surface 8 of the second outer plate portion 23, the second outer plate portion 23 is sandwiched between the second side plate portion 34 and the second inner plate portion 32 in the plate thickness direction T, as shown in Figures 9 and 10, and is positioned between the second side plate portion 34 and the second inner plate portion 32.

[0128] As shown in Figures 9 and 10, the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32 are arranged overlapping in the plate thickness direction T when the second inner plate portion 32 and the second side plate portion 34 are folded back onto the second outer plate portion 23, and are stacked in the order of the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32.

[0129] As shown in Figures 9 and 10, the folded plate portion 35 is folded back to the back surface 8 of the mounting plate portion 21 and comes into contact with the back surface 8 of the mounting plate portion 21. The folded plate portion 35 is folded back to the back surface 8 of the mounting plate portion 21 along the seventh straight line L7 and comes into contact with the back surface 8 of the mounting plate portion 21.

[0130] As shown in Figures 9 and 10, the folded plate portion 35 is folded back in the length direction U of the plate, between the first outer surface 3 (one end γ of the length of the mounting plate portion 21) and the first and second leg plate portions 26, 27 (first and second leg holes 24, 25 / first and fourth cutouts LA, LD), onto the back surface 8 of the mounting plate portion 21. By folding back onto the mounting plate portion 21, the folded plate portion 35 is positioned overlapping the back surface 8 of the mounting plate portion 21.

[0131] As shown in Figures 9 and 10, the folded plate portion 35 folds back onto the back surface 8 of the mounting plate portion 21, pressing the retaining sheet 2 (first sheet portion 2A) located on the folded plate portion 35 side (between the second and seventh straight lines L2 and L7) inside the packaging window hole 36 against the first outer surface 3 (one end γ of the length of the mounting plate portion 21), while pulling and tensing it towards the back surface 8 of the mounting plate portion 21. This presses the retaining sheet 2 (first sheet portion 2A) inside the packaging window hole 36 against the object to be packaged Z placed on the surface 7 (second sheet portion 2B) of the mounting plate portion 21, thereby fixing the object to be packaged Z to the surface 7 of the mounting plate portion 21.

[0132] As shown in Figures 11 to 16, the superimposed first side plate portion 33, first outer plate portion 22, and first inner plate portion 31 are raised on the plate surface 7 side of the mounting plate portion 21.

[0133] Of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first inner plate portion 31 and the first side plate portion 33 are raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 11 to 16. The first inner plate portion 31 and the first side plate portion 33 are raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5. The first inner plate portion 31 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the second straight line L2 (folded plate portion 35) and the first sheet pressing plate portion 37, and along the fifth straight line L5 between the first sheet pressing plate portion 37 and the first straight line L1. The first side plate portion 33 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the third outer surface 5 and the seventh straight line L7.

[0134] Of the superimposed first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first outer plate portion 22 is raised on the plate surface 7 side of the mounting plate portion 21, as shown in Figures 11 to 16. The first outer plate portion 22 is raised on the plate surface 7 side of the mounting plate portion 21 along the third straight line L3. The first outer plate portion 22 is raised on the plate surface 7 side of the mounting plate portion 21 along the third straight line L3 between the first straight line L1 and the second cutout LC (first leg hole portion 24 or first leg plate portion 26), and the third straight line L3 between the first cutout LA (first leg hole portion 24 or first leg plate portion 26) and the first outer surface 3.

[0135] The first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31 are, for example, raised perpendicular (or nearly perpendicular) to the plate surface 7 of the mounting plate portion 21.

[0136] As shown in Figures 11 to 16, the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32 are raised on the plate surface 7 side of the mounting plate portion 21.

[0137] As shown in Figures 11, 12, and 16, the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32 are positioned in the plate width direction R, with the second inner plate portion 32 (back surface 8) facing the first inner plate portion 31 (back surface 8), which is raised toward the plate surface 7 side of the mounting plate portion 21, due to the upward curvature of the mounting plate portion 21 toward the plate surface 7 side.

[0138] Of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second inner plate portion 32 and the second side plate portion 34 are raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 11 to 16. The second inner plate portion 32 and the second side plate portion 34 are raised towards the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6. The second inner plate portion 32 is raised towards the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6 between the second straight line L2 (folded plate portion 35) and the first sheet pressing plate portion 37, and along the sixth straight line L6 between the first sheet pressing plate portion 37 and the first straight line L1. The second side plate portion 34 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the fourth outer surface 6 and the seventh straight line L7.

[0139] Of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 11 to 16. The second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fourth straight line L4. The second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fourth straight line L4 between the first straight line L1 and the fifth cutout LE (second leg hole portion 25 or second leg plate portion 27), and the fourth straight line L4 between the fourth cutout LD (second leg hole portion 25 or second leg plate portion 27) and the first outer surface 3.

[0140] The second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32 are, for example, raised perpendicular (or nearly perpendicular) to the plate surface 7 of the mounting plate portion 21.

[0141] As shown in Figures 11 to 16, the first leg plate portion 26 is raised from the back surface 8 of the mounting plate portion 21 by the raising of the first outer plate portion 22, and protrudes from the folded plate portion 35 that is folded back onto the back surface 8 of the mounting plate portion 21. The first leg plate portion 26 is raised from the back surface 8 of the mounting plate portion 21 in the plate thickness direction T by the raising of the first outer plate portion 22 along the third straight line L3, and protrudes from the folded plate portion 35 (back surface 8 of the folded plate portion 35) that is folded back onto the back surface 8 of the mounting plate portion 21.

[0142] As shown in Figures 11 to 16, the first leg plate portion 26 is raised toward the plate surface 7 side of the mounting plate portion 21 of the first outer plate portion 22, and in the plate thickness direction T, it is pulled out from the first leg hole portion 24 to the back surface 8 of the mounting plate portion 21, and is lowered while separating from the back surface 8 of the mounting plate portion 21 (the back surface 8 of the folded plate portion 35 that is folded over to the back surface 8 of the mounting plate portion 21), and protrudes from the folded plate portion 35 that is folded over to the back surface 8 of the mounting plate portion 21. For example, the first leg plate portion 26 is lowered perpendicular (approximately perpendicular) to the back surface 8 of the mounting plate portion 21.

[0143] As shown in Figures 11 to 16, the second leg plate portion 27 is raised from the back surface 8 of the mounting plate portion 21 by the raising of the second outer plate portion 23, and protrudes from the folded plate portion 35 that is folded back onto the back surface 8 of the mounting plate portion 21. The second leg plate portion 27 is raised from the back surface 8 of the mounting plate portion 21 in the plate thickness direction T by the raising of the second outer plate portion 23 along the fourth straight line L4, and protrudes from the folded plate portion 35 (back surface 8 of the folded plate portion 35) that is folded back onto the back surface 8 of the mounting plate portion 21.

[0144] As shown in Figures 11 to 16, the second leg plate portion 27 is raised toward the plate surface 7 side of the mounting plate portion 21 of the second outer plate portion 23, and in the plate thickness direction T, it is pulled out from the second leg hole portion 25 to the back surface 8 of the mounting plate portion 21, and is lowered while separating from the back surface 8 of the mounting plate portion 21 (the back surface 8 of the folded plate portion 35 that is folded over to the back surface 8 of the mounting plate portion 21), and protrudes from the folded plate portion 35 that is folded over to the back surface 8 of the mounting plate portion 21. The second leg plate portion 27 is lowered perpendicular (approximately perpendicular) to the back surface 8 of the mounting plate portion 21, for example.

[0145] As shown in Figures 14 to 16, the first and second leg plate portions 26 and 27 are raised, and have the same leg plate widths Hγ and Hτ (fifth notch spacing P18) in the plate thickness direction T from the third and fourth straight lines L3 and L4 (first and second outer plate portions 22 and 23), and protrude from the back surface 8 of the folded plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21.

[0146] As shown in Figures 14 and 16, the first leg plate portion 26 has a leg plate length Lγ (second notch spacing P15) in the plate length direction U, and protrudes from the back surface 8 of the folded plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21, due to the raising of the first outer plate portion 22.

[0147] As shown in Figures 15 and 16, the second leg plate portion 27 has a leg plate length Lτ in the length direction U of the plate and protrudes from the back surface 8 of the folded plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21, due to the raising of the second outer plate portion 23.

[0148] As shown in Figures 14 and 16, the first sheet pressing plate portion 37 is lowered by the raising of the first inner plate portion 31 and pressed against the pressing sheet 2 (first sheet portion 2A). The first sheet pressing plate portion 37 is lowered by the raising of the first inner plate portion 31 along the fifth straight line L5 and pressed against the pressing sheet 2 (first sheet portion 2A).

[0149] As shown in Figures 14 and 16, the first sheet pressing plate portion 37 is lowered in the plate thickness direction T from the fifth straight line L5 (first inner plate portion 31) with a pressing plate width Hδ by the upward movement of the mounting plate portion 21 of the first inner plate portion 31 onto the plate surface 7, and is pressed against the pressing sheet 2 (first sheet portion 2A). The first sheet pressing plate portion 37 is lowered by the upward movement of the first inner plate portion 31 and is pressed against the pressing sheet 2 (first sheet portion 2A) with a pressing plate length Lδ in the plate length direction U.

[0150] As shown in Figures 14 and 16, the first sheet pressing plate portion 37 folds back the folded plate portion 35 onto the back surface 8 of the mounting plate portion 21, and when the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 is pressed against the object to be packaged Z placed on the surface 7 of the mounting plate portion 21, the first inner plate portion 31 is raised, causing it to be lowered against the pressing sheet 2 (first sheet portion 2A) pressed against the object to be packaged Z, and pressed against the pressing sheet 2 (first sheet portion 2A) pressed against the object to be packaged Z. At this time, the first sheet retaining plate portion 37 presses its plate width end face 37A against the retaining sheet 2 (first sheet portion 2A) between the fifth straight line L5 (first inner plate portion 31) and the object to be packaged Z placed on the mounting plate portion 21 in the plate width direction R, and is inserted into the first leg hole portion 24 while pulling and tensing the retaining sheet 2 (first sheet portion 2A) inside the packaging window hole 36 toward the first leg hole portion 24. The first sheet retaining plate portion 37, as the first inner plate portion 31 is raised, pulls and tenses the retaining sheet 2 (first and second sheet portions 2A, 2B) inside the packaging window hole 36 toward the first leg hole portion 24, passes through the first leg hole portion 24, and protrudes from the back surface 8 of the mounting plate portion 21. The first sheet-holding plate portion 37 protrudes between the back surface 8 of the mounting plate portion 21 and the front surface 26A of the first leg plate portion 26, with a gap between the front surface 37A of the first sheet-holding plate portion 37 and the front surface 26A of the first leg plate portion 26 in the plate thickness direction T.

[0151] As shown in Figures 15 and 16, the second sheet pressing plate portion 38 is lowered by the raising of the second inner plate portion 32 and pressed against the pressing sheet 2 (first sheet portion 2A). The second sheet pressing plate portion 38 is lowered by the raising of the second inner plate portion 32 along the sixth straight line L6 and pressed against the pressing sheet 2 (first sheet portion 2A).

[0152] As shown in Figures 15 and 16, the second sheet pressing plate portion 38 is lowered in the plate thickness direction T from the sixth straight line L6 (second inner plate portion 32) with a pressing plate width Hε by the rise of the mounting plate portion 21 of the second inner plate portion 32 onto the plate surface 7, and is pressed against the pressing sheet 2 (first sheet portion 2A). The second sheet pressing plate portion 38 is lowered by the rise of the second inner plate portion 32 and is pressed against the pressing sheet 2 (first sheet portion 2A) with a pressing plate length Lε in the plate length direction U.

[0153] As shown in Figures 15 and 16, the second sheet pressing plate portion 38 folds back the folded plate portion 35 onto the back surface 8 of the mounting plate portion 21, and when the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 is pressed against the object to be packaged Z placed on the plate surface 7 of the mounting plate portion 21, the second inner plate portion 32 is raised, causing it to be lowered against the pressing sheet 2 (first sheet portion 2A) pressed against the object to be packaged Z on the mounting plate portion 21, and pressed against the pressing sheet 2 (first sheet portion 2A) pressed against the object to be packaged Z on the mounting plate portion 21. At this time, the second sheet pressing plate portion 38 presses its end face 38A against the pressing sheet 2 (first and second sheet portions 2A, 2B) between the sixth straight line L6 (second inner plate portion 32) and the plate surface 7 of the mounting plate portion 21 (second sheet portion 2B) in the plate width direction R, and is inserted into the second leg hole portion 25 while pulling and tensing the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 toward the second leg hole portion 25. The second sheet pressing plate portion 38 protrudes from the back surface 8 of the mounting plate portion 21, passing through the second leg hole portion 25 while pulling and tensing the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 toward the second leg hole portion 25 as the second inner plate portion 32 rises. The second sheet-holding plate portion 38 protrudes between the back surface 8 of the mounting plate portion 21 and the back surface 27A of the second leg plate portion 27, with a gap between the plate width end surface 38A of the second sheet-holding plate portion 38 and the plate width end surface 27A of the second leg plate portion 27 in the plate thickness direction T. As a result, the packaging cushioning material X1 is assembled to pack the object to be packaged Z.

[0154] The packaging cushioning material X1 (hereinafter referred to as "assembled packaging cushioning material X1"), which is assembled by packaging the object to be packaged Z, is stored in a rectangular packaging box BX when transporting (carrying) it, as shown in Figures 17 to 20. The assembled packaging cushioning material X1 is stored in the packaging box BX from the other end of the mounting plate portion 21, on the side of the first straight line L1.

[0155] As shown in Figures 19 and 20, the cushioning material X1 for assembly and packaging is placed inside the packaging box BX with its first and second leg plate portions 26, 27 (plate width end faces 26A, 27A) in contact with the bottom plate 81 of the packaging box BX. As shown in Figure 20, the cushioning material X1 for assembly and packaging is placed inside the packaging box BX with its first and second side plate portions 33, 34 in contact with the left and right side plates 82, 83 of the packaging box BX.

[0156] As shown in Figures 19 and 20, the cushioning material X1 for assembly and packaging is placed inside the packaging box BX with its first and second outer plate portions 22, 23 (third outer surface 5) and first and second inner plate portions 31, 32 (fourth outer surface 6) in contact with the top plate 84 of the packaging box BX. The cushioning material X1 for assembly and packaging is placed inside the packaging box BX with the other end of the mounting plate portion 21 (first straight line L1 side) in contact with the rear side plate 85 of the packaging box BX.

[0157] Next, the lid plate 86 of the packaging box BX is closed, and the lid plate 86 is brought into contact with the first and second outer plate portions 22, 23 (third outer surface 5), the first and second inner plate portions 31, 32 (fourth outer surface 6), and the first outer surface 3 side (one end γ of the mounting plate portion 21) of the cushioning material X1 for assembly packaging inside the packaging box BX, and the packaging box BX is transported, etc.

[0158] The packaging cushioning material of the second embodiment will be described with reference to Figures 21 to 43. In Figures 21 to 43, the same reference numerals as in Figures 1 to 20 indicate the same components and configurations, so a detailed explanation is omitted. Furthermore, for the sake of clarity, we will first describe the unfolded packaging cushioning material of the second embodiment before assembly, and then explain the procedure for assembling the packaging cushioning material of the second embodiment and packaging the items to be packaged (assembly and packaging method).

[0159] In Figures 21 to 27, the packaging cushioning material X2 of the second embodiment (hereinafter referred to as "packaging cushioning material X2") has a flat plate 1 and a pressing sheet 2.

[0160] In the packaging cushioning material X2, the flat plate 1 has first to fourth outer surfaces 3, 4, 5, and 6, as described in Figures 1 to 6 (see Figures 21 to 26).

[0161] In the packing cushioning material X2, the flat plate 1 has first to seventh straight lines L1, L2, L3, L4, L5, L6, L7 and first to sixth notches LA, LB, LC, LD, LE, LF, as described in Figures 1 to 6 (see Figures 21 to 24).

[0162] In the packaging cushioning material X2, the flat plate 1 has a first flat plate 11 and a second flat plate 12, as described in Figures 1 to 6 (see Figures 21 to 26).

[0163] In the packaging cushioning material X2, the first flat plate 11 has a mounting plate portion 21, first and second outer plate portions 22, 23, first and second leg hole portions 24, 25, and first and second leg plate portions 26, 27, as described in Figures 1 to 6 (see Figures 21 to 24). In the packaging cushioning material X2, the first flat plate 11 (flat plate body 1) has a reinforcing plate portion 9, as shown in Figures 21 to 23, 25 and 27.

[0164] In the packing cushioning material X2, the second flat plate 12 has first and second inner plate portions 31, 32, first and second side plate portions 33, 34, folded plate portion 35, and first and second sheet pressing plate portions 37, 38, as described in Figures 1 to 6 (see Figures 21 to 23 and 25).

[0165] In the packing cushioning material X2, the 13th interval P13 (the interval between the 2nd and 7th straight lines L2 and L7) is, as shown in Figures 21 to 24, an interval that exceeds twice the thickness of the plate body 1 (2nd plate 12), for example, an interval that is greater than 2.1 times and less than or equal to 2.5 times the thickness of the plate body 1 (2nd plate 12).

[0166] In the packaging cushioning material X2, the fifth notch spacing P18 is a spacing that exceeds three times the plate thickness of the flat plate body 1 (first plate 11), as shown in Figure 21. In the packaging cushioning material X2, the fifth notch spacing P18 is, for example, a spacing that is greater than three times the plate thickness of the flat plate body 1 (first plate 11) and less than or equal to ten times.

[0167] In the packaging cushioning material X2, the hole widths Hα and Hβ of the first and second leg holes 24 and 25 are, as shown in Figure 24, more than three times the thickness of the plate body 1 (first plate 11). In the packaging cushioning material X2, the hole widths Hα and Hβ of the first and second leg holes 24 and 25 are, for example, more than three times and less than or equal to ten times the thickness of the plate body 1 (first plate 11).

[0168] In the packaging cushioning material X2, the leg plate widths Hγ and Hτ of the first and second leg plate portions 26 and 27 are, as shown in Figure 24, more than three times the thickness of the flat plate body 1 (first flat plate 11). In the packaging cushioning material X2, the leg plate widths Hγ and Hτ of the first and second leg plate portions 26 and 27 are, for example, more than three times and less than or equal to ten times the thickness of the flat plate body 1 (first flat plate 11).

[0169] The reinforcing plate portion 9 is formed in a flat plate shape, as shown in Figures 21 to 23 and Figures 25 to 27. The reinforcing plate portion 9 is positioned inside the packaging window opening 36. The reinforcing plate portion 9 is positioned inside the packaging window opening 36 with its plate surface 7 flush with the plate surface 7 of the mounting plate portion 21 (first and second inner plate portions 31, 32). The reinforcing plate portion 9 is positioned inside the packaging window opening 36 with its back surface 8 flush with the back surface 8 of the mounting plate portion 21 (first and second inner plate portions 31, 32). The reinforcing plate portion 9 is positioned continuously with the mounting plate portion 21 and connected to the mounting plate portion 21. The reinforcing plate portion 9 is connected to the mounting plate portion 21 along the first straight line L1 inside the packaging window opening 36.

[0170] As shown in Figure 26, the reinforcing plate portion 9 is positioned in the plate width direction R with a first reinforcing plate spacing M1 between the first plate end face 9A (one plate end face in the plate width direction R) and the fifth straight line L5 (first inner plate portion 31), and a second reinforcing plate spacing M2 between the first plate end face 9A and the plate width centerline a, between the fifth and sixth straight lines L5, L6 (first and second inner plate portions 31, 32).

[0171] As shown in Figure 26, the reinforcing plate portion 9 is positioned between the fifth and sixth straight lines L5, L6 (first and second inner plate portions 31, 32) in the plate width direction R, with a third reinforcing plate spacing M3 between the second plate end face 9B (the other plate end face in the plate width direction R) and the sixth straight line L6 (second inner plate portion 32), and a fourth reinforcing plate spacing M4 across the plate width centerline a. The third reinforcing plate spacing M3 is, for example, the same spacing as the first reinforcing plate spacing M1. The fourth reinforcing plate spacing M4 is, for example, the same spacing as the third reinforcing plate spacing M3.

[0172] As shown in Figure 26, the reinforcing plate portion 9 has a reinforcing plate width Hσ between the first and second plate end faces 9A and 9B in the plate width direction R. The reinforcing plate width Hσ of the reinforcing plate portion 9 is greater than the leg hole arrangement interval F1 (the interval between the first and second leg hole portions 24 and 25) and less than the 11th interval P11 (the interval between the first and second inner plate portions 31 and 32).

[0173] As shown in Figure 26, the reinforcing plate portion 9 is positioned in the plate length direction U between the first straight line L1 (one end of the mounting plate portion 21) and the seventh straight line L7 (folded plate portion 35). The reinforcing plate portion 9 is positioned in the plate length direction U with its third plate end face 9C (one end face in the plate length direction U) aligned with the first straight line L1 (the other end of the mounting plate portion 21), and the third plate end face 9C connected to the mounting plate portion 21. The reinforcing plate portion 9 is positioned with its fourth plate end face 9D (the other end face in the plate length direction U) aligned with the seventh straight line L7 (folded plate portion 35).

[0174] As shown in Figures 21 to 23, 25 and 26, the reinforcing plate portion 9 has a first notch hole 39 (first notch) and a second notch hole 40 (second notch).

[0175] The first notch 39 is formed in the reinforcing plate portion 9. As shown in Figure 26, the first notch 39 is positioned on the first plate end face 9A side of the reinforcing plate portion 9 in the plate width direction R. In the plate length direction U, the first notch 39 is positioned with a first notch spacing N1 across the first straight line L1 (third plate end face 9C) and a second notch spacing N2 across the seventh straight line L7 (folded plate portion 35). In the plate width direction R, the first notch 39 is positioned on the first plate end face 9A side of the reinforcing plate portion 9 with a third notch spacing N3 across the plate width centerline a. The first notch spacing N1 is narrower (smaller) than the first notch spacing P14. The second notch spacing N2 is narrower (smaller) than the third notch spacing P16. The spacing N3 for the third notch hole is narrower (smaller) than the spacing P17 for the fourth notch hole.

[0176] As shown in Figure 26, the first notch 39 has a notch width Hφ in the plate width direction R. The first notch 39 has a notch length Lφ in the plate length direction U. In the plate width direction R, the first notch 39 is formed with a notch width Hφ extending from the first plate end face 9A to the second plate end face 9B (plate width centerline a) of the reinforcing plate portion 9. In the plate thickness direction T, the first notch 39 penetrates the reinforcing plate portion 9 and opens to the plate surface 7 and plate back surface 8 of the reinforcing plate portion 9, as well as opening to the first plate end face 9A. The notch length Lφ is longer than the hole length Lα of the first leg hole portion 24.

[0177] The second notch 40 is formed in the reinforcing plate portion 9, as shown in Figure 26. The second notch 40 is located on the second plate end face 9B side of the reinforcing plate portion 9 in the plate width direction R. In the plate length direction U, the second notch 40 is located with a fourth notch spacing N4 between it and the first straight line L1 (third plate end face 9C), and with a fifth notch spacing N5 between it and the seventh straight line L7 (folded plate portion 35). In the plate width direction R, the second notch 40 is located on the second plate end face 9B side of the reinforcing plate portion 9, with a sixth notch spacing N6 between it and the plate width centerline a, and with a seventh notch spacing N7 between it and the first notch 39. The fourth notch spacing N4 is a narrower spacing (smaller spacing) than the first notch spacing P14, and is, for example, the same spacing as the first notch spacing N1. The fifth notch hole spacing N5 is narrower (smaller) than the seventh notch hole spacing P20, and is, for example, the same as the second notch hole spacing N2. The sixth notch hole spacing N6 is narrower (smaller) than the fourth notch hole spacing P17, and is, for example, the same as the third notch hole spacing N3.

[0178] As shown in Figure 26, the second notch 40 has a notch width Hλ in the plate width direction R. The second notch 40 has a notch length Lλ in the plate length direction U. In the plate width direction R, the second notch 40 is formed with a notch width Hλ extending from the second plate end face 9B to the first plate end face 9A of the reinforcing plate portion 9. In the plate thickness direction T, the second notch 40 penetrates the reinforcing plate portion 9 and opens to the plate surface 7 and plate back surface 8 of the reinforcing plate portion 9, as well as opening to the second plate end face 9B. The notch length Lλ is longer than the hole length Lβ of the second leg hole portion 25, and is, for example, the same as the notch length Lφ of the first notch 39. The first notch spacing N7 is narrower (smaller) than the hole arrangement spacing F1.

[0179] In the packing cushioning material X2, as shown in Figures 26 and 27, the first sheet retaining plate portion 37 protrudes into the packing window hole 36 from the fifth straight line L5 (first inner plate portion 31) in the plate width direction R, and is positioned (inserted) into the first notch hole 39. The first sheet retaining plate portion 37 protrudes into the first notch hole 39 at intervals from the inner circumferential surface 39A of the first notch hole 39.

[0180] In the packing cushioning material X2, as shown in Figures 26 and 27, the second sheet retaining plate portion 38 protrudes into the packing window hole 36 from the sixth straight line L6 (second inner plate portion 32) in the plate width direction R, and is positioned (inserted) into the second notch hole 40. The second sheet retaining plate portion 38 protrudes into the second notch hole 40 at intervals from the inner circumferential surface 40A of the two notches 40.

[0181] In the packaging cushioning material X2, the retaining sheet 2 (first sheet portion 2A) is arranged (laminated) on the surface 7 of the first and second inner plate portions 31, 32, the first and second side plate portions 33, 34, the folded plate portion 35, the first and second sheet retaining plate portions 37, 38, the reinforcing plate portion 9, the first and second outer plate portions 22, 23, and the mounting plate portion 21, covering the packaging window hole 36, as shown in Figures 21 to 23, 25 and 26. In the packaging cushioning material X2, the retaining sheet 2 (first sheet portion 2A) is fixed to the first and second inner plate portions 31, 32, the first and second side plate portions 33, 34, the folded plate portion 35 and the mounting plate portion 21, as described in Figures 1 to 5.

[0182] Next, the procedure for assembling the packing cushioning material X2 and packing the item to be packed Z (article / product) (assembly and packing method) will be explained with reference to Figures 28 to 39.

[0183] In the unfolded packing cushioning material X2, the reinforcing plate portion 9 is folded back onto the back surface 8 of the mounting plate portion 21 (see Figures 28 and 29).

[0184] As shown in Figures 28 and 29, the reinforcing plate portion 9 is folded back to the back surface 8 of the mounting plate portion 21. The reinforcing plate portion 9 is folded back to the back surface 8 of the mounting plate portion 21 along the first straight line L1.

[0185] As shown in Figures 28 and 29, the reinforcing plate portion 9 is folded over to the back surface 8 of the mounting plate portion 21, so that the back surface 8 of the reinforcing plate portion 9 comes into contact with the back surface 8 of the mounting plate portion 21. The reinforcing plate portion 9 is positioned inside the first notch 39 (inner circumferential surface 39A of the hole) to form the first leg hole portion 24 (first leg plate portion 26), and inside the second notched hole 40 (inner circumferential surface 40A of the hole) to form the second leg hole portion 25 (second leg plate portion 27), and is superimposed on the mounting plate portion 21.

[0186] As shown in Figures 28 and 29, the reinforcing plate portion 9 has its fourth plate end face 9D protruding from the first outer surface 3 of the mounting plate portion 21 (flat plate body 1) in the length direction U of the plate, and is folded back to the back surface 8 of the mounting plate portion 21.

[0187] With the reinforcing plate portion 9 folded back to the back surface 8 of the mounting plate portion 21, the object to be packaged Z is placed (stacked) on the surface 7 of the mounting plate portion 21 (see Figure 30).

[0188] As shown in Figure 30, the packaged object Z is placed on the surface 7 of the mounting plate 21 with a gap in the third straight line L3 (first outer plate portion 22) and a gap in the fourth straight line L4 (second outer plate portion 23). The packaged object Z is placed (stacked) on the surface 7 of the mounting plate 21 between the third and sixth cutouts LC and LF (between the first and second leg holes 24 and 25) in the plate width direction R.

[0189] As shown in Figure 30, the object to be packaged Z is placed on the retaining sheet 2 (second sheet portion 2B) positioned on the surface 7 of the mounting plate portion 21. The object to be packaged Z is placed on the surface 7 of the mounting plate portion 21 with the retaining sheet 2 (second sheet portion 2B) positioned between it and the surface 7 of the mounting plate portion 21.

[0190] Next, in Figure 31, the second flat plate 12 is folded back along the first straight line L1 to the surface 7 of the first flat plate 11. The second flat plate 12 is folded back to the surface 7 of the first flat plate 11, and is folded back along the first straight line L1 to the surface 7 of the first flat plate 11.

[0191] As shown in Figure 31, the second flat plate 12 is folded back onto the first flat plate 11, so that the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 covers the object to be packaged Z placed on the surface 7 of the mounting plate portion 21, and presses the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 against the object to be packaged Z.

[0192] As shown in Figure 31, the pressing sheet 2 (first sheet portion 2A) inside the packaging window 36 covers the object to be packaged Z placed on the plate surface 7 (second sheet portion 2B) of the mounting plate portion 21 by the folding of the second flat plate 12, and is pressed against the object to be packaged Z.

[0193] As shown in Figure 31, the object to be packaged Z, placed on the mounting plate portion 21 (second sheet portion 2B), is positioned inside the packaging window hole 36 by the folding of the second flat plate 12, covered by the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36, and pressed against the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36.

[0194] As shown in Figure 31, the first inner plate portion 31 is folded back to the surface 7 of the first outer plate portion 22 by the folding of the second flat plate 12 back to the first flat plate 11 (the surface 7 of the first flat plate 11). The first inner plate portion 31 is folded back to the surface 7 of the first outer plate portion 22. The first inner plate portion 31 is folded back to the surface 7 of the first outer plate portion 22 along the first straight line L1.

[0195] As shown in Figure 31, the first inner plate portion 31 is folded over the first outer plate portion 22 and positioned on top of the first outer plate portion 22 (plate surface 7).

[0196] As shown in Figure 31, the second inner plate portion 32 is folded back to the surface 7 of the second outer plate portion 23 by the folding of the second flat plate 12 back to the first flat plate 11 (the surface 7 of the first flat plate 11). The second inner plate portion 32 is folded back to the surface 7 of the second outer plate portion 23. The second inner plate portion 32 is folded back to the surface 7 of the second outer plate portion 23 along the first straight line L1.

[0197] As shown in Figure 31, the second inner plate portion 32 is folded over the second outer plate portion 23 and positioned on top of the second outer plate portion 23.

[0198] As shown in Figure 31, the first and second side plate portions 33 and 34 are arranged to protrude from the first outer surface 3 (one end γ of the mounting plate portion 21) of the mounting plate portion 21 in the length direction U of the plate, due to the folding of the second flat plate 12 onto the plate surface 7 of the first flat plate 11.

[0199] As shown in Figure 31, the folded plate portion 35 is positioned to protrude from the fourth plate end face 9D of the reinforcing plate portion that is folded over to the back surface 8 of the mounting plate portion 21 in the plate length direction U, due to the folding of the second plate 12 over the plate surface 7 of the first plate 11.

[0200] As shown in Figure 31, the first sheet retaining plate portion 37 is positioned inside the first leg hole portion 24 by folding the first inner plate portion 31 back onto the first outer plate portion 22, and is superimposed on the first leg plate portion 26. The first sheet retaining plate portion 37 is positioned (placed) between the plate surface 7 of the first sheet retaining plate portion 37 and the plate surface 7 (second sheet portion 2B) of the first leg plate portion 26 (mounting plate portion 21), and is superimposed on the first leg plate portion 26.

[0201] As shown in Figure 31, the first sheet-holding plate portion 37 is positioned between the object to be packaged Z placed on the mounting plate portion 21 and the fifth straight line L5 (first inner plate portion 31) in the plate width direction R, by folding the first inner plate portion 31 back onto the first outer plate portion 22.

[0202] As shown in Figure 31, the second sheet retaining plate portion 38 is positioned inside the second leg hole portion 25 by folding the second inner plate portion 32 back onto the second outer plate portion 23, and is superimposed on the second leg plate portion 27. The second sheet retaining plate portion 38 is positioned (placed) between the plate surface 7 of the second sheet retaining plate portion 38 and the plate surface 7 (second sheet portion 2B) of the second leg plate portion 27 (mounting plate portion 21), and is superimposed on the second leg plate portion 27.

[0203] As shown in Figure 31, the second sheet-holding plate portion 38 is positioned between the object to be packaged Z placed on the mounting plate portion 21 (second sheet portion 2B) and the sixth straight line L6 (second inner plate portion 32) by folding the second inner plate portion 32 back onto the second outer plate portion 23.

[0204] Next, as shown in Figures 32 and 33, the first side plate portions 33 and 34 are folded back to the back surfaces 8 of the first and second outer plate portions 22 and 23, and the folded plate portion 35 is folded back to the surface 7 of the reinforcing plate portion 9 which is folded back to the back surface 8 of the mounting plate portion 21.

[0205] As shown in Figures 32 and 33, the first side plate portion 33 is folded back to the back surface 8 of the first outer plate portion 22. The first side plate portion 33 is folded back to the back surface 8 of the first outer plate portion 22 along the second and seventh straight lines L2 and L7.

[0206] As shown in Figure 33, the first side plate portion 33 is folded back in the length direction U of the plate to the back surface 8 of the first outer plate portion 22 between the first outer surface 3 (one end γ of the mounting plate portion 21) and the first notch 39 (first leg hole portion 24 / first leg plate portion 26).

[0207] As shown in Figures 32 and 33, the first side plate portion 33 is folded back onto the first outer plate portion 22 and positioned on top of the back surface 8 of the first outer plate portion 22.

[0208] With the first inner plate portion 31 and the first side plate portion 33 folded back to form the first outer plate portion 22, the first outer plate portion 22 is sandwiched between the first side plate portion 33 and the first inner plate portion 31, as shown in Figures 32 and 33, and positioned between the first side plate portion 33 and the first inner plate portion 31.

[0209] As shown in Figures 32 and 33, the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31 are arranged overlapping in the plate thickness direction T when the first inner plate portion 31 and the first side plate portion 33 are folded back onto the first outer plate portion 22, and are stacked in the order of the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31.

[0210] As shown in Figures 32 and 33, the second side plate portion 34 is folded back to the back surface 8 of the second outer plate portion 23. The second side plate portion 34 is folded back to the back surface 8 of the second outer plate portion 23 along the second and seventh straight lines L2 and L7.

[0211] As shown in Figure 33, the second side plate portion 34 is folded back in the length direction U of the plate to the back surface 8 of the second outer plate portion 23 between the first outer surface 3 (one end γ of the mounting plate portion 21) and the second notch 40 (second leg hole portion 25 / second leg plate portion 27).

[0212] As shown in Figures 32 and 33, the second side plate portion 34 is folded over onto the second outer plate portion 23 and positioned on top of the back surface 8 of the second outer plate portion 23.

[0213] With the second inner plate portion 32 and the second side plate portion 34 folded back to the second outer plate portion 23, the second outer plate portion 23 is sandwiched between the second side plate portion 34 and the second inner plate portion 32, as shown in Figures 32 and 33, and is positioned between the second side plate portion 34 and the second inner plate portion 32.

[0214] As shown in Figures 32 and 33, the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32 are arranged to overlap in the plate thickness direction T when the second inner plate portion 32 and the second side plate portion 34 are folded back onto the second outer plate portion 23, and are stacked in the order of the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32.

[0215] As shown in Figures 32 and 33, the folded plate portion 35 is folded back onto the surface 7 of the reinforcing plate portion 9, which is folded back onto the back surface 8 of the mounting plate portion 21, and comes into contact with the surface 7 of the reinforcing plate portion 9. The folded plate portion 35 is folded back onto the surface 7 of the reinforcing plate portion 9, which is folded back onto the back surface 8 of the mounting plate portion 21, along the seventh straight line L7, and comes into contact with the surface 7 of the reinforcing plate portion 9.

[0216] As shown in Figures 32 and 33, the folded plate portion 35 is folded back in the length direction U of the plate to the back surface 8 of the reinforcing plate portion 9 between the first outer surface 3 (one end γ of the mounting plate portion 21) and the first and second notched holes 39, 40 (first and second leg plate portions 26, 27). By folding back to the reinforcing plate portion 9, the folded plate portion 35 is positioned on top of the reinforcing plate portion 9 that has been folded back to the back surface 8 of the mounting plate portion 21.

[0217] As shown in Figures 32 and 33, the folded plate portion 35, by folding the reinforcing plate portion 9 toward the plate surface 7, presses the retaining sheet 2 (first sheet portion 2A) located on the folded plate portion 35 side within the packaging window hole 36 against the fourth plate end surface 9D of the reinforcing plate portion 9 protruding from the first outer surface 3 of the mounting plate portion 21, while simultaneously pulling and tensing it toward the plate surface 7 of the reinforcing plate portion 9. This presses the retaining sheet 2 (first sheet portion 2A) within the packaging window hole 36 against the object to be packaged Z placed on the plate surface 7 (second sheet portion 2B) of the mounting plate portion 21, thereby fixing the object to be packaged Z to the plate surface 7 of the mounting plate portion 21.

[0218] The superimposed first side plate portion 33, first outer plate portion 22, and first inner plate portion 31 are raised on the plate surface 7 side of the mounting plate portion 21, as shown in Figures 34 to 39.

[0219] Of the superimposed first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first inner plate portion 31 and the first side plate portion 33 are raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 34 to 39. The first inner plate portion 31 and the first side plate portion 33 are raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5. The first inner plate portion 31 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the second straight line L2 (folded plate portion 35) and the first sheet pressing plate portion 37, and along the fifth straight line L5 between the first sheet pressing plate portion 37 and the first straight line L1. The first side plate portion 33 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the third outer surface 5 and the seventh straight line L7.

[0220] Of the superimposed first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 34 to 39. The first outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21 along the third straight line L3. The first outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21 along the third straight line L3 between the first straight line L1 and the second cutout LB (first leg hole portion 24 or first leg plate portion 26), and the third straight line L3 between the first cutout LA (first leg hole portion 24 or first leg plate portion 26) and the first outer surface 3.

[0221] The first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31 are, for example, raised perpendicular (or nearly perpendicular) to the plate surface 7 of the mounting plate portion 21.

[0222] The superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32 are raised on the plate surface 7 side of the mounting plate portion 21, as shown in Figures 34 to 39.

[0223] As shown in Figures 34, 35, and 39, the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32 are positioned in the plate width direction R, with the second inner plate portion 32 (back surface 8) facing the first inner plate portion 31 (back surface 8), which is raised toward the plate surface 7 side of the mounting plate portion 21, due to the upward curvature of the mounting plate portion 21 toward the plate surface 7 side.

[0224] Of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second inner plate portion 32 and the second side plate portion 34 are raised toward the plate surface 7 side of the mounting plate portion 21, as shown in Figures 34 to 39. The second inner plate portion 32 and the second side plate portion 34 are raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6. The second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6 between the second straight line L2 (folded plate portion 35) and the second sheet pressing plate portion 38, and along the sixth straight line L6 between the second sheet pressing plate portion 38 and the first straight line L1. The second side plate portion 34 is raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6 between the fourth outer surface 6 and the seventh straight line L7.

[0225] Of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 34 to 39. The second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fourth straight line L4. The second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fourth straight line L4 between the first straight line L1 and the fifth cutout LE (second leg hole portion 25 or second leg plate portion 27), and the fourth straight line L4 between the fourth cutout LD (second leg hole portion 25 or second leg plate portion 27) and the first outer surface 3.

[0226] The second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32 are, for example, raised perpendicular (or nearly perpendicular) to the plate surface 7 of the mounting plate portion 21.

[0227] As shown in Figures 34 to 39, the first leg plate portion 26 rises up along the third straight line L3, causing the first outer plate portion 22 to rise, and in the plate thickness direction T, it rises down from the back surface 8 of the mounting plate portion 21 and protrudes from the folded plate portion 35 (back surface 8 of the folded plate portion 35) which is folded back onto the plate surface 7 of the reinforcing plate portion 9.

[0228] As shown in Figures 34 to 39, the first leg plate portion 26 is raised toward the plate surface 7 side of the mounting plate portion 21 of the first outer plate portion 22, and in the plate thickness direction T, it is pulled out from the first leg hole portion 24 to the back surface 8 of the mounting plate portion 21, passes through the first notch hole 39, and is lowered while moving away from the plate surface 7 of the reinforcing plate portion 9 (the back surface 8 of the folded plate portion 35 that is folded over the plate surface 7 of the reinforcing plate portion 9), and protrudes from the folded plate portion 35 that is folded over the plate surface 7 of the reinforcing plate portion 9. For example, the first leg plate portion 26 is lowered perpendicular (approximately perpendicular) to the back surface 8 of the mounting plate portion 21 (reinforcing plate portion 9).

[0229] As shown in Figures 34 to 39, the second leg plate portion 27 rises up along the fourth straight line L4, causing the second outer plate portion 23 to rise, and in the plate thickness direction T, it rises down from the back surface 8 of the mounting plate portion 21 and protrudes from the back surface 8 of the folded plate portion 35 that is folded back onto the plate surface 7 of the reinforcing plate portion 9.

[0230] As shown in Figures 34 to 39, the second leg plate portion 27 is raised toward the plate surface 7 side of the mounting plate portion 21 of the second outer plate portion 23, and in the plate thickness direction T, it is pulled out from the second leg hole portion 25 to the back surface 8 of the mounting plate portion 21, passes through the second notch hole 40, and is lowered while moving away from the plate surface 7 of the reinforcing plate portion 9 (the back surface 8 of the folded plate portion 35 that is folded over the plate surface 7 of the reinforcing plate portion 9), and protrudes from the folded plate portion 35 that is folded over the plate surface 7 of the reinforcing plate portion 9. The second leg plate portion 27 is lowered perpendicular (approximately perpendicular) to the back surface 8 of the mounting plate portion 21.

[0231] As shown in Figures 34 to 39, the first and second leg plate portions 26 and 27 are raised from the third and fourth straight lines L3 and L4 (first and second outer plate portions 22 and 23) and have the same leg plate widths Hγ and Hτ (fifth notch spacing P18) in the plate thickness direction T, and protrude from the folded plate portion 35 that is folded back on the back surface 8 of the mounting plate portion 21.

[0232] As shown in Figures 37 and 38, the first leg plate portion 26 has a leg plate length Lγ (second notch spacing P15) in the length direction U of the plate, and protrudes from the back surface 8 of the folded plate portion 35 which is folded back onto the plate surface 7 of the reinforcing plate portion 9, due to the raising of the first outer plate portion 22.

[0233] As shown in Figures 38 and 39, the second leg plate portion 27 has a leg plate length Lτ in the length direction U of the plate and protrudes from the back surface 8 of the folded plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21, due to the raising of the second outer plate portion 23.

[0234] As shown in Figures 37 and 39, the first sheet pressing plate portion 37 is lowered by the raising of the first inner plate portion 31 and pressed against the pressing sheet 2 (first sheet portion 2A). The first sheet pressing plate portion 37 is lowered by the raising of the first inner plate portion 31 along the fifth straight line L5 and pressed against the pressing sheet 2 (first sheet portion 2A).

[0235] As shown in Figures 37 and 39, the first sheet pressing plate portion 37 is lowered in the plate thickness direction T from the fifth straight line L5 (first inner plate portion 31) with a pressing plate width Hδ by the upward movement of the mounting plate portion 21 of the first inner plate portion 31 onto the plate surface 7, and is pressed against the pressing sheet 2 (first sheet portion 2A). The first sheet pressing plate portion 37 is lowered by the upward movement of the first inner plate portion 31 and is pressed against the pressing sheet 2 (first sheet portion 2A) with a pressing plate length Lδ in the plate length direction U.

[0236] As shown in Figures 37 and 39, the first sheet pressing plate portion 37 folds back the folded plate portion 35 onto the plate surface 7 of the reinforcing plate portion 9, and when the pressing sheet 2 (first sheet portion 2A) inside the packaging window hole 36 is pressed against the object to be packaged Z placed on the plate surface 7 of the mounting plate portion 21, the first inner plate portion 31 is raised, causing it to be lowered against the pressing sheet 2 (first sheet portion 2A) pressed against the object to be packaged Z on the mounting plate portion 21, and pressed against the pressing sheet 2 (first sheet portion 2A) pressed against the object to be packaged Z on the mounting plate portion 21. At this time, the first sheet retaining plate portion 37 presses its end face 37A against the retaining sheet 2 (first sheet portion 2A) between the fifth straight line L5 (first inner plate portion 31) and the object to be packaged Z placed on the mounting plate portion 21 in the plate width direction R, and pulls the retaining sheet 2 (first sheet portion 2A) inside the packaging window hole 36 from the first leg hole portion 24 towards the first notch hole 39, thereby tensing it, and is inserted into the first leg hole portion 24 and the first notch hole 39. The first sheet-holding plate portion 37, by raising the first inner plate portion 31, pulls and tensions the holding sheet 2 (first and second sheet portions 2A, 2B) inside the packaging window hole 36 from the first leg hole portion 24 toward the first notch hole 39, and passes through the first leg hole portion 24 and the first notch hole 39, protruding from the plate surface 7 of the reinforcing plate portion 9 that is folded back onto the back surface 8 of the mounting plate portion 21. In the plate thickness direction T, the first sheet-holding plate portion 37 protrudes between the plate surface 7 of the reinforcing plate portion 9 that is folded back onto the back surface 8 of the mounting plate portion 21 and the plate width end face 26A of the first leg plate portion 26, with a gap between the plate width end face 37A of the first sheet-holding plate portion 37 and the plate width end face 26A of the first leg plate portion 26.

[0237] As shown in Figures 38 and 39, the second sheet pressing plate portion 38 is folded down by the rising of the second inner plate portion 32, and is pressed against the pressing sheet 2 (first sheet portion 2A). The second sheet pressing plate portion 38 is folded down by the rising of the second inner plate portion 32 along the sixth straight line L6, and is pressed against the pressing sheet 2 (first sheet portion 2A).

[0238] As shown in Figures 38 and 39, the second sheet pressing plate portion 38 has a pressing plate width Hε from the sixth straight line L6 (the second inner plate portion 32) in the plate thickness direction T by the rising of the second inner plate portion 32, is folded down, and is pressed against the pressing sheet 2 (first sheet portion 2A). The second sheet pressing plate portion 38 is folded down by the rising of the second inner plate portion 32, has a pressing plate length Lε in the plate length direction U, for example, has the same leg length as the pressing plate length Lδ of the first sheet pressing plate portion 37, and is pressed against the pressing sheet 2 (first sheet portion 2A).

[0239] As shown in Figures 38 and 39, in a state where the folded plate portion 35 is folded back onto the plate surface 7 of the reinforcing plate portion 9, and the pressing sheet 2 (first sheet portion 2A) in the packaging window hole 36 is pressed against the packaging object Z placed on the plate surface 7 of the placement plate portion 21, the second sheet pressing plate portion 38 is folded down onto the pressing sheet 2 (first sheet portion 2A) pressed against the packaging object Z on the placement plate portion 21 by the rising of the second inner plate portion 32, and is pressed against the pressing sheet 2 (first sheet portion 2A) pressed against the packaging object Z on the placement plate portion 21. At this time, the second sheet pressing plate portion 38 presses the plate width end face 38A against the pressing sheet 2 (the first and second sheet portions 2A, 2B) between the sixth straight line L6 (the second inner plate portion 32) and the packaging object Z placed on the plate surface 7 (the second sheet portion 2B) of the mounting plate portion 21 in the plate width direction R, and is inserted into the second leg hole portion 25 and the second notch hole 40 while pulling and tensioning the pressing sheet 2 (the first sheet portion 2A) in the packaging window hole 36 from the second leg hole portion 25 toward the second notch hole 40 side. By the rising of the second inner plate portion 32, the second sheet pressing plate portion 38 penetrates the second leg hole portion 25 and the second notch hole 40 while pulling and tensioning the pressing sheet 2 (the first sheet portion 2A) in the packaging window hole 36 from the second leg hole portion 25 toward the second notch hole 40 side, and protrudes from the plate surface 7 of the reinforcing plate portion 9 folded back to the plate back surface 8 of the mounting plate portion 21. In the plate thickness direction T, the second sheet pressing plate portion 38 protrudes between the plate surface 7 of the reinforcing plate portion 9 folded back to the plate back surface 8 of the mounting plate portion 21 and the plate width end face 27A of the second leg plate portion 27, with a gap spaced between the plate width end face 38A of the second sheet pressing plate portion 38 and the plate width end face 27A of the second leg plate portion 27. Thereby, the packaging cushioning material X2 is assembled by packaging the packaging object Z.

[0240] The packaging cushioning material X2 assembled by packaging the packaging object Z (hereinafter referred to as "the assembled packaging cushioning material X2") is stored in a rectangular parallelepiped packaging box BX as shown in Figures 40 to 43 when being transported or the like. The assembled packaging cushioning material X2 is stored into the packaging box BX from the other plate length end τ side (the first straight line L1 side) of the mounting plate portion 21.

[0241] As shown in Figures 42 and 43, the assembled packaging cushioning material X2 is stored in the packaging box BX with the first and second leg plate portions 26, 27 (the plate width end faces 26A, 27A) in contact with the bottom flat plate 81 of the packaging box BX. As shown in Figure 43, the assembled packaging cushioning material X2 is stored in the packaging box BX with the first and second side plate portions 33, 34 in contact with the left and right side flat plates 82, 83 of the packaging box BX.

[0242] As shown in Figures 42 and 43, the cushioning material X2 for assembly and packaging is placed inside the packaging box BX with its first and second outer plate portions 22, 23 (third outer surface 5) and first and second inner plate portions 31, 32 (fourth outer surface 6) in contact with the top plate 84 of the packaging box BX. The cushioning material X2 for assembly and packaging is placed inside the packaging box BX with the other end of the mounting plate portion 21 (first straight line L1 side) in contact with the rear side plate 85 of the packaging box BX.

[0243] Next, the lid plate 86 of the packaging box BX is closed, and the lid plate 86 is brought into contact with the first and second outer plate portions 22, 23 (third outer surface 5), the first and second inner plate portions 31, 32 (fourth outer surface 6) of the cushioning material X2 for assembly packaging inside the packaging box BX, and the fourth plate end surface 9D of the reinforcing plate portion 9 that protrudes from the first outer surface 3 of the mounting plate portion 21, and the packaging box BX is transported, etc.

[0244] The packaging cushioning material of the third embodiment will be described with reference to Figures 44 to 62. In Figures 44 to 62, the same reference numerals as in Figures 1 to 20 indicate the same components and configurations, so a detailed explanation is omitted. Furthermore, for the sake of clarity, we will first describe the unfolded packaging cushioning material of the third embodiment before assembly, and then explain the procedure for assembling the packaging cushioning material of the third embodiment and packaging the items to be packaged (assembly and packaging method).

[0245] In Figures 44 to 62, the packaging cushioning material X3 of the third embodiment (hereinafter referred to as "packaging cushioning material X3") has a flat plate 1 and a pressing sheet 2.

[0246] In the packing cushioning material X3, the flat plate 1 has first to fourth outer surfaces 3, 4, 5, and 6, as described in Figures 1 to 6 (see Figures 44 to 47).

[0247] In the packaging cushioning material X3, the flat plate 1 has first to seventh straight lines L1, L2, L3, L4, L5, L6, L7 and first to sixth notches LA, LB, LC, LD, LE, LF, as described in Figures 1 to 6 (see Figures 44 to 47). In the packaging cushioning material X3, the flat plate 1 has seventh to twelfth notches LG, LH, LI, LJ, LK, LM, as shown in Figure 47.

[0248] In the packing cushioning material X3, the flat plate 1 has a first flat plate 11 and a second flat plate 12, as described in Figures 1 to 6 (see Figures 44 to 47).

[0249] In the packaging cushioning material X3, the first flat plate 11 has a mounting plate portion 21, first and second outer plate portions 22, 23, first and second leg hole portions 24, 25, and first and second leg plate portions 26, 27, as described in Figures 1 to 6 (see Figures 44 to 47). In the packaging cushioning material X3, the first flat plate 11 (flat plate body 1) has third and fourth leg hole portions 51, 52 and first and second leg plate portions 53, 54, as shown in Figures 44 to 47.

[0250] In the packing cushioning material X3, the second flat plate 12 has first and second inner plate portions 31, 32, first and second side plate portions 33, 34, and folded plate portion 35, as described in Figures 1 to 6 (see Figures 44 to 46).

[0251] In the packaging cushioning material X3, the second cut interval P15 and the sixth cut interval P19 are, for example, 1 / 5 (one-fifth) or more and 1 / 4 (one-quarter) or less of the first cut interval P1, as shown in Figure 47.

[0252] In the packing cushioning material X3, the hole lengths Lα and Lβ of the first and second leg holes 24 and 25 are, for example, 1 / 5 (one-fifth) or more and 1 / 4 (one-quarter) or less of the first interval P1, as shown in Figure 47.

[0253] In the packing cushioning material X3, the leg plate lengths Lγ and Lτ of the first and second leg plate portions 26 and 27 are, for example, 1 / 5 (one-fifth) or more and 1 / 4 (one-quarter) or less of the first interval P1, as shown in Figure 47.

[0254] As shown in Figure 47, the seventh notch LG (seventh slit) is positioned between the second slit LB and the first straight line L1 in the plate length direction U. The seventh notch LG is positioned between the second notch LB and the eighth notch spacing Q1 in the plate length direction U.

[0255] As shown in Figure 47, the seventh notch LG is positioned between the third straight line L3 and the center line a of the plate width in the plate width direction R. The seventh notch LG extends from the third straight line L3 toward the center line a of the plate width in the plate width direction R. The seventh notch LG intersects (is perpendicular to) the third straight line L3. For example, the seventh notch LG is positioned parallel to the first straight line L1 in the plate length direction U. The seventh notch LG is positioned parallel to the first straight line L1 and extends from the third straight line L3 toward the center line a of the plate width with a notch length La.

[0256] The eighth notch LH (eighth slit) is positioned in the plate length direction U between the seventh notch LG and the first straight line L1, as shown in Figure 47. The eighth notch LH is positioned in the plate length direction U with a ninth notch spacing Q2 between the seventh notch LG and the first straight line L1. The eighth notch LH is positioned in the plate length direction U with a tenth notch spacing Q3 between the first straight line L1 and the first notch spacing Q3. The ninth notch spacing Q2 is, for example, between 1 / 5 and 1 / 4 of the first spacing P1. The ninth notch spacing Q2 is, for example, the same spacing as the second notch spacing P15.

[0257] As shown in FIG. 47, the eighth cut LH is disposed between the third straight line L3 and the plate width center line a in the plate width direction R. The eighth cut LH extends from the third straight line L3 toward the plate width center line a in the plate width direction R. The eighth cut LH intersects (perpendicularly intersects) the third straight line L3. For example, the eighth cut LH is disposed parallel to the first straight line L1 in the plate length direction U. The eighth cut LH is disposed parallel to the first straight line L1, and extends from the third straight line L3 toward the plate width center line a with a cut length La.

[0258] As shown in FIG. 47, the ninth cut LI (ninth slit) is located between the third straight line L3 and the plate width center line a in the plate width direction R, and is disposed at a fourth cut interval P17 from the plate width center line a. The ninth cut LI is disposed parallel to the third straight line L3 at a fifth cut interval P18 in the plate width direction R. The ninth cut LI is disposed parallel to the third straight line L3.

[0259] As shown in FIG. 47, the ninth cut LI extends between the seventh and eighth cuts LG and LH in the plate length direction U, and is formed continuously with the seventh and eighth cuts LG and LH.

[0260] As shown in FIG. 47, the tenth cut LJ (tenth slit) is disposed between the fifth cut LE and the first straight line L1 in the plate length direction U. The tenth cut LJ is disposed at an eleventh cut interval Q4 from the fifth cut LE in the plate length direction U. The eleventh cut interval Q4 is, for example, the same interval as the eighth cut interval Q1.

[0261] As shown in FIG. 47, the tenth cut LJ is disposed between the fourth straight line L4 and the plate width center line a in the plate width direction R. The tenth cut LJ extends from the fourth straight line L4 toward the plate width center line a in the plate width direction R. The tenth cut LJ intersects (perpendicularly intersects) the fourth straight line L4. For example, the tenth cut LJ is disposed parallel to the first straight line L1 in the plate length direction U. The tenth cut LJ is disposed parallel to the first straight line L1, and extends from the fourth straight line L4 toward the plate width center line a with a cut length La.

[0262] The 11th notch LK (11th slit) is positioned in the plate length direction U between the 10th notch LJ and the first straight line L1, as shown in Figure 47. The 11th notch LK is positioned in the plate length direction U with a 12th notch spacing Q5 between the 10th notch LJ. The 11th notch LJ is positioned in the plate length direction U with a 13th notch spacing Q6 between the first straight line L1. The 12th notch spacing Q5 is, for example, between 1 / 5 and 1 / 4 of the first spacing P1. The 12th notch spacing Q5 is, for example, the same spacing as the 9th notch spacing Q2 and the 2nd notch spacing P15. The 13th notch spacing Q6 is, for example, the same spacing as the 10th notch spacing Q3.

[0263] As shown in Figure 47, the 11th notch LK is positioned between the 4th straight line L4 and the center line a of the plate width in the plate width direction R. The 11th notch LK extends from the 4th straight line L4 toward the center line a of the plate width in the plate width direction R. The 11th notch LK intersects (is perpendicular to) the 4th straight line L4. For example, the 11th notch LK is positioned parallel to the 1st straight line L1 in the plate length direction U. The 11th notch LK is positioned parallel to the 1st straight line L1 and extends from the 4th straight line L4 toward the center line a of the plate width with a notch length La.

[0264] As shown in Figure 47, the 12th notch LM (12th slit) is located in the plate width direction R between the 4th straight line L4 and the plate width centerline a, and is positioned with a 4th notch spacing P17 between the plate width centerline a. The 12th notch LM is positioned parallel to the 4th straight line L4 in the plate width direction R, with a 5th notch spacing P18 between them. The 12th notch LM is positioned parallel to the 4th straight line L4.

[0265] As shown in Figure 47, the 12th notch LM extends in the length direction U of the plate between the 10th and 11th notches LJ and LK, and is formed continuously with the 10th and 11th notches LJ and LK.

[0266] As shown in Figures 44 to 47, each of the notches LG, LH, LI, LJ, LK, and LM penetrates the first flat plate 11 (mounting plate portion 21) in the plate thickness direction T and opens into the plate surface 7 and plate back surface 8 of the first flat plate 11 (mounting plate portion 21).

[0267] The third leg hole portion 51 is formed in the mounting plate portion 21, as shown in Figures 44 to 47. The third leg hole portion 51 is located on one end α (third straight line L3 side) of the mounting plate portion 21 in the plate width direction R. The third leg hole portion 51 is located adjacent to the first outer plate portion 22 (third straight line L3) in the plate width direction R, on one end α (third straight line L3 side) of the mounting plate portion 21. The third leg hole portion 51 is located between the third straight line L3 (one end α of the mounting plate portion 21) and the plate width centerline a in the plate width direction R. As shown in Figure 47, the third leg hole portion 51 is located on the plate width centerline a with a first leg hole spacing P17 (fourth cut spacing P17) in the plate width direction R. The third leg hole 51 is demarcated by the seventh to ninth notches LG, LH, LI and the third straight line L3 (the third straight line L3 between the seventh and eighth notches LG, LH).

[0268] As shown in Figure 47, the third leg hole 51 has a hole width Hα in the plate width direction R, extending from the third straight line L3 (one end of the plate width α of the mounting plate portion 21) toward the center line a of the plate width.

[0269] As shown in Figure 47, the third leg hole portion 51 is positioned in the plate length direction U with a fifth leg hole spacing Q1 (eighth notch spacing Q1) separated from the second notch LB (first leg hole portion 24). The third leg hole portion 51 is positioned in the plate length direction U with a sixth leg hole spacing Q3 (tenth notch spacing Q3) separated from the first straight line L1 (the other plate length end τ of the mounting plate portion 21). The third leg hole portion 51 has a hole length Lα in the plate length direction U.

[0270] As shown in Figures 44 to 47, the third leg hole 51 penetrates the mounting plate portion 21 (first flat plate 11) in the plate thickness direction T and opens to the plate surface 7 and plate back surface 8 of the mounting plate portion 21 (first flat plate 11).

[0271] The fourth leg hole portion 52 is formed in the mounting plate portion 21 as shown in Figures 44 to 47. The fourth leg hole portion 52 is located on the other end β (fourth straight line L4 side) of the mounting plate portion 21, separated from the third leg hole portion 51 by a leg hole arrangement interval F1 in the plate width direction R. The fourth leg hole portion 52 is located on the other end β (fourth straight line L4 side) of the mounting plate portion 21, adjacent to the second outer plate portion 23 (fourth straight line L4) in the plate width direction R. The fourth leg hole portion 52 is located between the fourth straight line L4 (the other end β of the mounting plate portion 21) and the plate width centerline a in the plate width direction R. The fourth leg hole portion 52 is located on the plate width centerline a, separated by a first leg hole interval P17 (fourth cut interval P17) in the plate width direction R. The fourth leg hole 52 is demarcated by the 10th to 12th cuts LJ, LK, LM and the fourth straight line L4 (the fourth straight line L4 between the 10th and 11th cuts LJ, LK).

[0272] As shown in Figure 47, the fourth leg hole 52 has a hole width Hβ in the plate width direction R, extending from the fourth straight line L4 (the other end of the plate width β of the mounting plate portion 21) toward the center line a of the plate width.

[0273] As shown in Figure 47, the fourth leg hole portion 52 is positioned in the plate length direction U with a distance of the seventh leg hole spacing Q4 (eleventh notch spacing Q4) from the fourth notch LE (second leg hole portion 25). The fourth leg hole portion 52 is positioned in the plate length direction U with a distance of the eighth leg hole spacing Q6 (thirteenth notch spacing Q6) from the first straight line L1 (the other plate length end τ of the mounting plate portion 21). The fourth leg hole portion 52 has a hole length Lβ in the plate length direction U.

[0274] As shown in Figures 44 to 47, the fourth leg hole 52 penetrates the mounting plate portion 21 (first flat plate 11) in the plate thickness direction T and opens to the plate surface 7 and plate back surface 8 of the mounting plate portion 21 (first flat plate 11).

[0275] As shown in Figure 47, the third leg plate portion 53 is divided in the plate width direction R by the seventh cut LG, the eighth cut LH, and the ninth cut LI, which are continuous with the first outer plate portion 22.

[0276] As shown in Figures 44 to 47, the third leg plate portion 53 is connected to the first outer plate portion 22 in the plate width direction R. The third leg plate portion 53 protrudes from the first outer plate portion 22 into the third leg hole portion 51 in the plate width direction. The third leg plate portion 53 is positioned so that its plate surface 7 is flush with the plate surface 7 of the first outer plate portion 22.

[0277] As shown in Figure 47, the third leg plate portion 53 is positioned in the plate width direction R with a distance P17 from the plate width centerline a. The third leg plate portion 53 is positioned in the plate width direction R between the first outer plate portion 22 (third straight line L3) and the plate width centerline a. In the plate width direction R, the third leg plate portion 53 protrudes from the first outer plate portion 22 (third straight line L3) toward the plate width centerline a and has a leg plate width Hγ into the third leg hole portion 51. In the plate width direction R, the third leg plate portion 53 has a plate width end face 53A at the end that protrudes from the third straight line L3 (first outer plate portion 22).

[0278] As shown in Figure 47, the third leg plate portion 53 is positioned in the plate length direction U with a fifth leg plate spacing Q1 (eighth notch spacing Q1) between it and the first leg plate portion 26 (first leg hole portion 24). The third leg plate portion 53 is positioned in the plate length direction U with a sixth leg plate spacing Q3 (tenth notch spacing Q3) between it and the first straight line L1 (the other end of the plate length τ of the mounting plate portion 21). The third leg plate portion 53 has a leg plate length Lγ in the plate length direction U.

[0279] As shown in Figure 47, the fourth leg plate portion 54 is divided in the plate width direction R by the tenth cut LJ, the eleventh cut LK, and the twelfth cut LM, which are continuous with the second outer plate portion 23.

[0280] As shown in Figures 44 to 47, the fourth leg plate portion 54 is connected to the second outer plate portion 23 in the plate width direction R. The fourth leg plate portion 54 protrudes from the second outer plate portion 23 into the fourth leg hole portion 52 in the plate width direction R. The fourth leg plate portion 54 is positioned so that its plate surface 7 is flush with the plate surface 7 of the second outer plate portion 23.

[0281] As shown in Figure 47, the fourth leg plate portion 54 is positioned in the plate width direction R, separated from the plate width centerline a by the first leg plate spacing P17. The fourth leg plate portion 54 is positioned in the plate width direction R, separated from the third leg plate portion 53 by the leg plate spacing F1 (leg hole spacing F1). The fourth leg plate portion 54 is positioned in the plate width direction R, between the second outer plate portion 23 (fourth straight line L4) and the plate width centerline a. The fourth leg plate portion 54 protrudes from the second outer plate portion 23 (fourth straight line L4) toward the plate width centerline a, having a leg plate width Hτ, into the fourth leg hole portion 52. The fourth leg plate portion 54 has a plate width end face 54A at the end that protrudes from the fourth straight line L4 (second outer plate portion 23) in the plate width direction R.

[0282] As shown in Figure 47, the fourth leg plate portion 54 is positioned in the plate length direction U with a seventh leg plate spacing Q4 (eleventh notch spacing Q4) between it and the second leg hole portion 25 (second leg plate portion 27). The fourth leg plate portion 54 is positioned in the plate length direction U with an eighth leg plate spacing Q6 (thirteenth notch spacing Q6) between it and the first straight line L1 (the other end of the plate length τ of the mounting plate portion 21). The fourth leg plate portion 54 has a leg plate length Lτ in the plate length direction U. The seventh leg plate spacing Q4 is, for example, the same spacing as the fifth leg plate spacing Q1. The eighth leg plate spacing Q6 is, for example, the same spacing as the sixth leg plate spacing Q3.

[0283] In the packaging cushioning material X3, the retaining sheet 2 (first sheet portion 2A) is placed (laminated) on the surface 7 of the first and second inner plate portions 31, 32, the first and second side plate portions 33, 34, the folded plate portion 35, and the mounting plate portion 21, covering the packaging window hole 36, as shown in Figures 44 to 46. In the packaging cushioning material X3, the retaining sheet 2 (first sheet portion 2A) is fixed to the first and second inner plate portions 31, 32, the first and second side plate portions 33, 34, the folded plate portion 35, and the mounting plate portion 21, as described in Figures 1 to 5.

[0284] Next, the procedure for assembling the packing cushioning material X3 and packing the item to be packed Z (article / product) (assembly and packing method) will be explained with reference to Figures 48 to 57.

[0285] In the unfolded packing cushioning material X3, as shown in Figure 48, the object to be packed Z is placed on the plate surface 7 of the mounting plate portion 21. In the packing cushioning material X3, the object to be packed Z is placed on the plate surface 7 (second sheet portion 2B) of the mounting plate portion 21, as explained in Figure 7.

[0286] Next, in the packaging cushioning material X3, as shown in Figure 49, the second flat plate 12 is folded back onto the surface 7 of the first flat plate 11. In the packaging cushioning material X3, the second flat plate 12 is folded back onto the surface 7 of the first flat plate 11, as explained in Figure 8.

[0287] In the packing cushioning material X3, the pressing sheet 2 (first sheet portion 2A) covers the object to be packed Z placed on the mounting plate portion 21 by folding the second flat plate 12, as described in Figure 8, and is pressed against the object to be packed Z (see Figure 49). In the packing cushioning material X3, the object to be packed Z placed on the plate surface 7 of the mounting plate portion 21 is positioned inside the packing window hole 36 by folding the second flat plate 12, as described in Figure 8, and is pressed against the packing window hole 36 by the pressing sheet 2 (first sheet portion 2A) (see Figure 49).

[0288] In the packing cushioning material X3, the first inner plate portion 31 is folded back onto the plate surface 7 of the first outer plate portion 22, as described in Figure 8, and is placed on top of the first outer plate portion 22 (see Figure 49).

[0289] In the packing cushioning material X3, the second inner plate portion 32 is folded back onto the plate surface 7 of the second outer plate portion 23, as described in Figure 8, and is placed overlapping the second outer plate portion 23 (see Figure 49).

[0290] In the packing cushioning material X3, the first and second side plate portions 33 and 34 are arranged to protrude from the first outer surface 3 of the mounting plate portion 21 by folding the second flat plate 12 over the first flat plate 11, as described in Figure 8 (see Figure 49).

[0291] In the packing cushioning material X3, the folded plate portion 35 is positioned to protrude from the first outer surface 3 of the mounting plate portion 21 by folding the second flat plate 12 over the first flat plate 11, as described in Figure 8 (see Figure 49).

[0292] Next, in the packing cushioning material X3, as shown in Figures 50 and 51, the first and second side plate portions 33 and 34 are folded back to the back surface 8 of the first and second outer plate portions 22 and 23, and the folded plate portion 35 is folded back to the back surface 8 of the mounting plate portion 21.

[0293] In the packing cushioning material X3, the first side plate portion 33 is folded back onto the back surface 8 of the first outer plate portion 22, as described in Figures 9 and 10, and is placed overlapping the back surface 8 of the first outer plate portion 22 (see Figures 50 and 51).

[0294] In the packing cushioning material X3, the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31 are stacked and superimposed in the order of the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31, as described in Figures 9 and 10 (see Figures 50 and 51).

[0295] In the packing cushioning material X3, the second side plate portion 34 is folded back onto the back surface 8 of the second outer plate portion 23, as described in Figures 9 and 10, and is placed overlapping the back surface 8 of the second outer plate portion 23 (see Figures 50 and 51).

[0296] In the packing cushioning material X3, the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32 are stacked and superimposed in the order of the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32, as described in Figures 9 and 10 (see Figures 50 and 51).

[0297] In the packing cushioning material X3, the folded plate portion 35 is folded back to the back surface 8 of the mounting plate portion 21, as described in Figures 9 and 10 (see Figures 50 and 51).

[0298] Next, in the packing cushioning material X3, of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first inner plate portion 31 is raised on the plate surface 7 side of the mounting plate portion 21, as shown in Figures 52, 53, and 56. The first inner plate portion 31 is raised on the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5. The first inner plate portion 31 is raised on the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the second straight line L2 (folded plate portion 35) and the first straight line L1.

[0299] In the packing cushioning material X3, of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first side plate portion 33 is raised towards the plate surface 7 side of the mounting plate portion 21, as described in Figures 11 to 16 (see Figures 52 and 53).

[0300] In the packing cushioning material X3, of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 52, 53, and 56. The first outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21 along the third straight line L3. The first outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21 along the third straight line L3 between the first straight line L1 and the eighth notch LH (third leg hole portion 51 or third leg plate portion 53), the third straight line L3 between the second and seventh notches LB,LG (between the first and third leg holes 24, 51 or between the first and third leg plate portions 26, 53), and the third straight line L3 between the first notch LA (first leg hole portion 24 or first leg plate portion 26) and the first outer surface 3.

[0301] In the packing cushioning material X3, of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21, as shown in Figures 52, 53, and 56. The second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6. The second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6 between the second straight line L2 (folded plate portion 35) and the first straight line L1.

[0302] In the packing cushioning material X3, of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second side plate portion 34 is raised towards the plate surface 7 side of the mounting plate portion 21, as described in Figures 11 to 16 (see Figures 52 and 53).

[0303] In the packing cushioning material X3, of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21, as shown in Figures 52, 53, and 56. The second outer plate portion 23 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fourth straight line L4. The second outer plate portion 2 is raised towards the plate surface 7 side of the mounting plate portion 21 along the fourth straight line L4 between the first straight line L1 and the 11th notch LK (fourth leg hole portion 52 or fourth leg plate portion 54), the fourth straight line L4 between the fifth and tenth notches LE,LJ (between the second and fourth leg holes 25,52, or between the second and fourth leg plate portions 27,54), and the fourth straight line L4 between the fourth notch LD (second leg hole portion 25 or second leg plate portion 27) and the first outer surface 3.

[0304] In the packing cushioning material X3, the first leg plate portion 26 is raised from the back surface 8 of the mounting plate portion 21 by raising the first outer plate portion 22, as described in Figures 11 to 16, and protrudes from the folded plate portion 35 that is folded back onto the back surface 8 of the mounting plate portion 21 (see Figures 52, 53, 54 and 56).

[0305] In the packing cushioning material X3, the second leg plate portion 27 is raised from the back surface 8 of the mounting plate portion 21 by raising the second outer plate portion 23, as described in Figures 11 to 16, and protrudes from the folded plate portion 35 that is folded back onto the back surface 8 of the mounting plate portion 21 (see Figures 52, 53, 55 and 56).

[0306] As shown in Figures 52 to 54 and Figure 57, the third leg plate portion 53 is raised from the back surface 8 of the mounting plate portion 21 by raising the first outer plate portion 22, and protrudes from the folded plate portion 35 that is folded back onto the back surface 8 of the mounting plate portion 21. The third leg plate portion 53 is raised from the back surface 8 of the mounting plate portion 21 in the plate thickness direction T by raising the first outer plate portion 22 along the third straight line L3, and protrudes from the folded plate portion 35 (back surface 8 of the folded plate portion 35) that is folded back onto the back surface 8 of the mounting plate portion 21.

[0307] As shown in Figure 57, the third leg plate portion 53 is raised toward the plate surface 7 side of the mounting plate portion 21 of the first outer plate portion 22, and in the plate thickness direction T, it is pulled out from the third leg hole portion 51 toward the back surface 8 of the mounting plate portion 21, and is lowered while separating from the back surface 8 of the mounting plate portion 21 (the back surface 8 of the folded plate portion 35 that is folded over the back surface 8 of the mounting plate portion 21), and protrudes from the folded plate portion 35 that is folded over the back surface 8 of the mounting plate portion 21. For example, the third leg plate portion 53 is lowered perpendicular (approximately perpendicular) to the back surface 8 of the mounting plate portion 21.

[0308] As shown in Figures 52, 53, 55, and 57, the fourth leg plate portion 54 is raised from the back surface 8 of the mounting plate portion 21 by the raising of the second outer plate portion 23 and protrudes from the folded plate portion 35 that is folded back onto the back surface 8 of the mounting plate portion 21. The fourth leg plate portion 54 is raised from the back surface 8 of the mounting plate portion 21 in the plate thickness direction T by the raising of the second outer plate portion 23 along the fourth straight line L4 and protrudes from the folded plate portion 35 (back surface 8 of the folded plate portion 35) that is folded back onto the back surface 8 of the mounting plate portion 21.

[0309] As shown in Figure 57, the fourth leg plate portion 54 is raised toward the plate surface 7 side of the mounting plate portion 21 of the second outer plate portion 23, and in the plate thickness direction T, it is pulled out from the fourth leg hole portion 52 to the back surface 8 of the mounting plate portion 21, and is lowered while separating from the back surface 8 of the mounting plate portion 21 (the back surface 8 of the folded plate portion 35 that is folded over to the back surface 8 of the mounting plate portion 21), and protrudes from the folded plate portion 35 that is folded over to the back surface 8 of the mounting plate portion 21. For example, the fourth leg plate portion 54 is lowered perpendicular (approximately perpendicular) to the back surface 8 of the mounting plate portion 21.

[0310] As shown in Figures 55 to 57, the first to fourth leg plate portions 26, 27, 53, and 54 are raised by the first and second outer plate portions 22, 23, and have the same leg plate widths Hγ and Hτ (the same leg plate widths as the first and second leg plate portions 26, 27) in the plate thickness direction T from the third and fourth straight lines L3 and L4 (first and second outer plate portions 22, 23), and protrude from the back surface 8 of the folded plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21.

[0311] As shown in Figure 54, the first and third leg plate portions 26 and 53 have a leg plate length Lγ in the length direction U of the plate, and protrude from the back surface 8 of the folded-back plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21, due to the raising of the first outer plate portion 22.

[0312] As shown in Figure 55, the second and fourth leg plate portions 38 and 54 have a leg plate length Lτ in the length direction U of the plate, and protrude from the back surface 8 of the folded plate portion 35 which is folded back onto the back surface 8 of the mounting plate portion 21, due to the raising of the second outer plate portion 23. This allows the packaging cushioning material X3 to be assembled by packaging the object to be packaged Z.

[0313] The packaging cushioning material X3 (hereinafter referred to as "assembled packaging cushioning material X3") assembled by packaging the object to be packaged Z is stored in a rectangular packaging box BX when transporting (carrying) it, as shown in Figures 58 to 62. The assembled packaging cushioning material X3 is stored in the packaging box BX from the other end of the mounting plate portion 21, on the side of the first straight line L1.

[0314] As shown in Figures 60 to 62, the cushioning material X3 for assembly and packaging is placed inside the packaging box BX with its first and second leg plate portions 26, 27 (plate width end faces 26A, 27A) and third and fourth leg plate portions 53, 54 (plate width end faces 53A, 54A) in contact with the bottom plate 81 of the packaging box BX. As shown in Figure 62, the cushioning material X3 for assembly and packaging is placed inside the packaging box BX with its first and second side plate portions 33, 34 in contact with the left and right side plates 82, 83 of the packaging box BX.

[0315] As shown in Figures 60 to 62, the cushioning material X3 for assembly and packaging is placed inside the packaging box BX with its first and second outer plate portions 22, 23 (third outer surface 5) and first and second inner plate portions 31, 32 (fourth outer surface 6) in contact with the top plate 84 of the packaging box BX. The cushioning material X3 for assembly and packaging is placed inside the packaging box BX with the other end of the mounting plate portion 21 (first straight line L1 side) in contact with the rear side plate 85 of the packaging box BX.

[0316] Next, as shown in Figures 60 to 62, the lid plate 86 of the packaging box BX is closed, and the lid plate 86 is brought into contact with the first and second outer plate portions 22, 23 (third outer surface 5), the first and second inner plate portions 31, 32 (fourth outer surface 6), and the first outer surface 3 side (one end γ of the mounting plate portion 21) of the cushioning material X3 for assembly packaging inside the packaging box BX, and the packaging box BX is transported, etc.

[0317] The fourth embodiment of the packaging cushioning material will be described with reference to Figures 63 to 77. In Figures 63 to 77, the same reference numerals as in Figures 1 to 43 indicate the same components and configurations, so a detailed explanation is omitted. Furthermore, for the sake of clarity, we will first describe the packing cushioning material of the fourth embodiment in its unfolded state before assembly, and then explain the procedure for assembling the packing cushioning material of the fourth embodiment and packing the items to be packaged (assembly and packaging method).

[0318] In Figures 63 to 77, the packing cushioning material X4 of the fourth embodiment (hereinafter referred to as "packing cushioning material X4") has a flat plate 1 and a pressing sheet 2.

[0319] In the packing cushioning material X4, the flat plate 1 has first to fourth outer surfaces 3, 4, 5, and 6, as described in Figures 1 to 6 (see Figures 63 to 67).

[0320] In the packing cushioning material X4, the flat plate 1 has first to seventh straight lines L1, L2, L3, L4, L5, L6, L7 and first to sixth notches LA, LB, LC, LD, LE, LF, as described in Figures 1 to 6 (see Figures 63 to 66).

[0321] In the packing cushioning material X4, the flat plate 1 has a first flat plate 11 and a second flat plate 12, as described in Figures 1 to 6 (see Figures 63 to 69).

[0322] In the packaging cushioning material X4, the first flat plate 11 has a mounting plate portion 21, first and second outer plate portions 22, 23, first and second leg hole portions 24, 25, and first and second leg plate portions 26, 27, as described in Figures 1 to 6 (see Figures 63 to 11). In the packaging cushioning material X4, the first flat plate 11 (flat plate body 1) has a reinforcing plate portion 9 (first and second notched holes 39, 40), as described in Figures 21 to 27 (see Figures 63 to 65 and 67).

[0323] In the packing cushioning material X4, the second flat plate 12 has first and second inner plate portions 31, 32, first and second side plate portions 33, 34, and folded plate portion 35, as described in Figures 1 to 6 (see Figures 63 to 65 and 67).

[0324] In the packing cushioning material X4, the 13th interval P13 (the interval between the second and seventh straight lines L2 and L7) is, as shown in Figure 64, an interval that exceeds twice the thickness of the plate body 1 (second plate 12), for example, an interval that is greater than 2.1 times and less than or equal to 2.5 times the thickness of the plate body 1 (second plate 12).

[0325] In the packaging cushioning material X4, the fifth notch spacing P18 is a spacing that exceeds three times the plate thickness of the flat plate body 1 (first plate 11), as shown in Figure 66. In the packaging cushioning material X4, the fifth notch spacing P18 is, for example, a spacing that is greater than three times the plate thickness of the flat plate body 1 (first plate 11) and less than or equal to ten times.

[0326] In the packaging cushioning material X4, the hole widths Hα and Hβ of the first and second leg holes 24 and 25 are, as shown in Figure 66, more than three times the thickness of the plate body 1 (first plate 11). In the packaging cushioning material X4, the hole widths Hα and Hβ of the first and second leg holes 24 and 27 are, for example, more than three times and less than or equal to ten times the thickness of the plate body 1 (first plate 11).

[0327] In the packaging cushioning material X4, the leg plate widths Hγ and Hτ of the first and second leg plate portions 26 and 27 are, as shown in Figure 66, more than three times the thickness of the flat plate body 1 (first flat plate 11). In the packaging cushioning material X4, the leg plate widths Hγ and Hτ of the first and second leg plate portions 26 and 27 are, for example, more than three times and less than or equal to ten times the thickness of the flat plate body 1 (first flat plate 11).

[0328] In the packaging cushioning material X4, the retaining sheet 2 (first sheet portion 2A) covers the packaging window hole 36 and is placed (laminated) on the surface 7 of the first and second inner plate portions 31, 32, the surface 7 of the first and second side plate portions 33, 34, the surface 7 of the folded plate portion 35, the surface 7 of the reinforcing plate portion 9, and the surface 7 of the mounting plate portion 21, as shown in Figures 63 to 65 and Figure 67. In the packaging cushioning material X4, the retaining sheet 2 (first sheet portion 2A) is fixed to the first and second inner plate portions 31, 32, the first and second side plate portions 33, 34, the folded plate portion 35, and the mounting plate portion 21, as described in Figures 1 to 5.

[0329] Next, the procedure for assembling the packing cushioning material X4 and packing the item to be packed Z (article / product) (assembly and packing method) will be explained with reference to Figures 68 to 74.

[0330] In the unfolded packing cushioning material X4, the reinforcing plate portion 9 is folded back to the back surface 8 of the mounting plate portion 21, as shown in Figure 68. In the packing cushioning material X4, the reinforcing plate portion 9 is folded back to the back surface 8 of the mounting plate portion 21, as described in Figures 28 and 29.

[0331] With the reinforcing plate portion 9 folded back to the back surface 8 of the mounting plate portion 21, the object to be packaged Z is placed on the surface 7 of the mounting plate portion 21 of the packaging cushioning material X4, as shown in Figure 69. In the packaging cushioning material X4, the object to be packaged Z is placed on the surface 7 (second sheet portion 2B) of the mounting plate portion 21, as explained in Figure 30.

[0332] Next, in the packaging cushioning material X4, as shown in Figure 70, the second flat plate 12 is folded back onto the surface 7 of the first flat plate 11. In the packaging cushioning material X4, the second flat plate 12 is folded back onto the surface 7 of the first flat plate 11, as explained in Figure 31.

[0333] In the packing cushioning material X4, the pressing sheet 2 (first sheet portion 2A) covers the object to be packed Z placed on the mounting plate portion 21 by folding the second flat plate 12, as described in Figure 31, and is pressed against the object to be packed Z (see Figure 70). In the packing cushioning material X4, the object to be packed Z placed on the plate surface 7 of the mounting plate portion 21 is positioned inside the packing window hole 36 by folding the second flat plate 12, as described in Figure 31, and is pressed against the packing window hole 36 by the pressing sheet 2 (first sheet portion 2A) (see Figure 70).

[0334] In the packing cushioning material X4, the first inner plate portion 31 is folded over onto the plate surface 7 of the first outer plate portion 22, as described in Figure 31, and is placed on top of the first outer plate portion 22 (see Figure 70).

[0335] In the packing cushioning material X4, the second inner plate portion 32 is folded back onto the plate surface 7 of the second outer plate portion 23, as described in Figure 31, and is placed overlapping the second outer plate portion 23 (see Figure 70).

[0336] In the packing cushioning material X4, the first and second side plate portions 33 and 34 are arranged to protrude from the first outer surface 3 of the mounting plate portion 21 by folding the second flat plate 12 over the first flat plate 11, as described in Figure 31 (see Figure 70).

[0337] In the packing cushioning material X4, the folded plate portion 35 is positioned to protrude from the fourth plate end face 9D of the reinforcing plate portion 9 by folding the second flat plate 12 toward the first flat plate 11, as described in Figure 31 (see Figure 70).

[0338] Next, in the packing cushioning material X4, as shown in Figure 71, the first and second side plate portions 33 and 34 are folded back to the back surfaces 8 of the first and second outer plate portions 22 and 23, and the folded plate portion 35 is folded back to the back surface 8 of the reinforcing plate portion 9 which is folded back to the back surface 8 of the mounting plate portion 21.

[0339] In the packing cushioning material X4, the first side plate portion 33 is folded back onto the back surface 8 of the first outer plate portion 22, as described in Figures 32 and 33, and is placed overlapping the back surface 8 of the first outer plate portion 22 (see Figure 71).

[0340] In the packing cushioning material X4, the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31 are stacked and superimposed in the order of the first side plate portion 33, the first outer plate portion 22, and the first inner plate portion 31, as described in Figures 32 and 33 (see Figure 71).

[0341] In the packing cushioning material X4, the second side plate portion 34 is folded back onto the back surface 8 of the second outer plate portion 23, as described in Figures 32 and 33, and is placed overlapping the back surface 8 of the second outer plate portion 23 (see Figure 71).

[0342] In the packing cushioning material X4, the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32 are stacked and superimposed in the order of the second side plate portion 34, the second outer plate portion 23, and the second inner plate portion 32, as described in Figures 32 and 33 (see Figure 71).

[0343] In the packing cushioning material X4, the folded plate portion 35 is folded back to the plate surface 7 of the reinforcing plate portion 9, which is folded back to the plate surface 8 of the mounting plate portion 21, as described in Figures 32 and 33 (see Figure 71).

[0344] Next, in the packing cushioning material X4, of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first inner plate portion 31 is raised on the plate surface 7 side of the mounting plate portion 21, as shown in Figures 72 to 74. The first inner plate portion 31 is raised on the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5. The first inner plate portion 31 is raised on the plate surface 7 side of the mounting plate portion 21 along the fifth straight line L5 between the second straight line L2 (folded plate portion 35) and the first straight line L1.

[0345] In the packing cushioning material X4, of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first side plate portion 33 is raised towards the plate surface 7 side of the mounting plate portion 21, as described in Figures 34 to 39 (see Figures 72 to 74).

[0346] In the packing cushioning material X4, of the overlapping first side plate portion 33, first outer plate portion 22, and first inner plate portion 31, the first outer plate portion 22 is raised on the plate surface 7 side of the mounting plate portion 21, as described in Figures 34 to 39 (see Figures 72 to 74).

[0347] In the packing cushioning material X4, of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21, as shown in Figures 72 to 74. The second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6. The second inner plate portion 32 is raised toward the plate surface 7 side of the mounting plate portion 21 along the sixth straight line L6 between the second straight line L2 (folded plate portion 35) and the first straight line L1.

[0348] In the packing cushioning material X4, of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second side plate portion 34 is raised towards the plate surface 7 side of the mounting plate portion 21, as described in Figures 34 to 39 (see Figures 72 to 74).

[0349] In the packing cushioning material X4, of the superimposed second side plate portion 34, second outer plate portion 23, and second inner plate portion 32, the second outer plate portion 22 is raised towards the plate surface 7 side of the mounting plate portion 21, as described in Figures 34 to 39 (see Figures 72 to 74).

[0350] In the packing cushioning material X4, the first leg plate portion 26 is raised from the back surface 8 of the mounting plate portion 21 by raising the first outer plate portion 22, as described in Figures 34 to 39, and protrudes from the folded plate portion 35 that is folded back onto the plate surface 7 of the reinforcing plate portion 9 (see Figures 72 to 74).

[0351] In the packing cushioning material X4, the second leg plate portion 27 is raised from the back surface 8 of the mounting plate portion 21 by raising the second outer plate portion 23, as described in Figures 34 to 39, and protrudes from the folded plate portion 35 that is folded back onto the front surface 7 of the reinforcing plate portion 9 (see Figures 72 to 74).

[0352] In the packing cushioning material X4, as shown in Figure 74, the first and second leg plate portions 26 and 27 are raised from the third and fourth straight lines L3 and L4 (first and second outer plate portions 22 and 23) and have the same leg plate width Hγ and Hτ in the plate thickness direction T, and protrude from the back surface 8 of the folded plate portion 35 that is folded back onto the plate surface 7 of the reinforcing plate portion 9. This allows the packaging cushioning material X4 to be assembled by packaging the object to be packaged Z.

[0353] The packaging cushioning material X4 (hereinafter referred to as "assembled packaging cushioning material X4"), which is assembled by packaging the object to be packaged Z, is placed inside a rectangular packaging box BX when transporting (carrying) it, as described in Figures 40 to 43 (see Figures 75 to 77).

[0354] In the present invention, the assembled packing cushioning materials X1, X2, X3, X4 inside the packing box BX are arranged with the first and first outer plate portions 22, 23, the first inner plate portions 31, 32, and the first and second side plate portions 33, 34 raised toward the plate surface 7 of the mounting plate portion 21, and the first and second side plate portions 33, 34 in contact with the respective side flat plates 82, 83 of the packing box BX. As a result, the assembly of the packing cushioning material X4 is not released (unfolded), and the first and second leg plate portions 26, 27 are held down.

[0355] In the assembled state, the cushioning materials X1, X2, X3, and X4 for packaging of the present invention have the first and second side plate portions 33 and 34 in contact with the respective side plates 82 and 83 of the packaging box BX, the first and second outer plate portions 22 and 23 (third outer surface 5) and the first and second inner plate portions 31 and 32 (fourth outer surface 6) in contact with the top plate 84 and lid plate 86 of the packaging box BX, and the first and second leg plate portions 26 and 27 (first to fourth leg plate portions 26, 27, 53, and 54) in contact with the packaging box BX, thereby providing excellent cushioning function without the packaged object Z placed on the plate surface 7 of the support plate portion 21 coming into contact with the bottom plate 81.

[0356] The cushioning materials X1 and X2 for packaging according to the present invention are configured such that the reinforcing plate portion 9 of the folded plate portion 35 is folded back toward the plate surface 7, thereby tensing the retaining sheet 2 (first sheet portion 2A) inside the packaging window hole 36 in the length direction U, and the first and second sheet retaining plate portions 37 and 38 are lowered, thereby tensing the retaining sheet 2 (first sheet portion 2A) inside the packaging window hole 36 in the width direction R, thereby fixing the object to be packaged Z to the plate surface 7 (second sheet portion 2B) of the mounting plate portion 21 by the retaining sheet 2 (first sheet portion 2A) inside the packaging window hole 36.

[0357] The cushioning materials X2 and X4 for packaging according to the present invention can reinforce the mounting plate portion 21 on which the object to be packaged Z is placed by folding the reinforcing plate portion 9 back onto the back surface 8 of the mounting plate portion 21 and overlapping it with the back surface 8 of the mounting plate portion 21.

[0358] In the packing cushioning materials X1, X2, X3, and X4 of the present invention, the pressing sheet 2 may consist only of the first sheet portion 2A without having a second sheet portion 2B, and the object to be packed Z is placed on the plate surface 7 of the mounting plate portion 21. [Industrial applicability]

[0359] This invention is ideal for packaging items to be packaged. [Explanation of Symbols]

[0360] X1,X2,X3,X4 Packing cushioning material 1 flat plate 2. Pressing sheet 11 1st plate 12 Second plate 21 Mounting plate section 22 First outer plate part 23 Second outer plate part 24 First leg hole 25 Second leg hole 26 1st leg plate part 27 Second leg plate part 31 First inner plate part 32 Second inner plate part 33 First side plate part 34 Second side plate part 35 Folded plate section 36 Packaging window holes 37. First sheet retaining plate section 38. Second sheet retaining plate section

Claims

1. The device comprises a flat plate body formed in the shape of a plate having a plate length, plate width, and plate thickness, having first and second outer surfaces in the direction of the plate length, and third and fourth outer surfaces in the direction of the plate width, and a pressing sheet, The aforementioned flat plate body is In the length direction of the plate body, a first straight line is arranged parallel to the outer surface of the first plate at a first interval and intersects the third and fourth outer surfaces, In the length direction of the plate, the second straight line is arranged parallel to the first straight line at a second interval on the second outer surface and at a third interval on the first straight line, and intersects the side surfaces of the third and fourth outer plates, In the length direction of the plate, it is positioned between the first outer surface and the first straight line, and in the width direction of the flat plate body, it is positioned on the third outer surface at a fourth interval, and is perpendicular to the first outer surface and the first straight line, In the length direction of the plate, it is arranged between the first outer surface and the first straight line, and in the width direction of the plate, it is arranged on the fourth outer surface at a fifth interval and on the third straight line at a sixth interval, and is perpendicular to the first outer surface and the first straight line, In the length direction of the plate, a fifth straight line is positioned between the second outer surface and the first straight line, and in the width direction of the plate, a fifth straight line is positioned between the third outer surface and the third straight line, separated by a seventh interval from the third outer surface and separated by an eighth interval from the third straight line, perpendicular to the first straight line and intersecting the second outer surface, In the length direction of the plate, a sixth straight line is positioned between the second outer surface and the first straight line, and in the width direction of the plate, a sixth straight line is positioned between the fourth outer surface and the fourth straight line, separated by a ninth interval from the fourth outer surface, a tenth interval from the fourth straight line, and an eleventh interval from the fifth straight line, perpendicular to the first straight line and intersecting the second outer surface. In the length direction of the plate, a seventh straight line is arranged parallel to the second outer surface at a 12-degree interval and parallel to the second straight line at a 13-degree interval, perpendicular to the fifth and sixth straight lines and intersecting the third and fourth outer surfaces, In the length direction of the plate, the first cuts are arranged on the first outer surface at a first cut interval, and in the width direction of the plate, the first cuts extend from the third straight line toward the center line of the plate width between the third and fourth straight lines, In the length direction of the plate, the first cuts are spaced at a second cut interval, and the first straight line is spaced at a third cut interval, and in the width direction of the plate, the second cuts extend from the third straight line toward the center line of the plate width, In the plate width direction, the third cut is positioned between the third straight line and the plate width center line, with a fourth cut spacing between the plate width center line and a fifth cut spacing between the third straight line, and in the plate length direction, it extends between the first and second cuts and is formed continuously with respect to the first and second cuts. In the length direction of the plate, a fourth cut is provided on the first outer surface at a distance of the first cut interval, and in the width direction of the plate, a fourth cut extends from the fourth straight line toward the center line of the plate width, In the length direction of the plate, the fourth cut is spaced at a sixth cut interval, and the first straight line is spaced at a seventh cut interval, and in the width direction of the plate, the fifth cut extends from the fourth straight line toward the center line of the plate width, In the plate width direction, a sixth cut is positioned between the fourth straight line and the plate width center line, with the fourth cut spacing separated from the plate width center line and the fifth cut spacing separated from the fourth straight line, and in the plate length direction, a sixth cut extends between the fourth and fifth cuts and is formed continuously with respect to the fourth and fifth cuts, A first flat plate, partitioned by the first straight line, the first outer surface, and the third and fourth outer surfaces, It comprises a second flat plate that is divided by the first straight line, the second outer surface, the third and fourth outer surfaces, and that is folded back onto the surface of the first flat plate along the first straight line, Each of the aforementioned cuts is, In the thickness direction of the plate, the first flat plate is penetrated and an opening is made on the surface and back surface of the first flat plate, The first plate is, A mounting plate portion is demarcated by the first outer surface, the first straight line, the third straight line, the fourth straight line, and the first to sixth notches, A first outer plate portion is defined by the first outer surface, the first straight line, the third straight line, and the third outer surface, and is raised along the third straight line toward the plate surface side of the aforementioned mounting plate portion, A second outer plate portion is defined by the first outer surface, the first straight line, the fourth straight line, and the fourth outer surface, and is raised along the fourth straight line toward the plate surface side of the aforementioned mounting plate portion, A first leg plate portion is provided, which is continuous with the first outer plate portion and is demarcated by the first cut, the second cut and the third cut, Continuing from the second outer plate portion, it has a second leg plate portion that is demarcated by the fourth cut, the fifth cut and the sixth cut, The second plate is, A first inner plate portion is defined by the first straight line, the second straight line, the fifth straight line and the third outer surface, is folded back onto the surface of the first outer plate portion along the first straight line, and is raised towards the surface of the aforementioned mounting plate portion along the fifth straight line, A second inner plate portion is separated by the first straight line, the second straight line, the sixth straight line and the fourth outer surface, folded back to the surface of the second outer plate portion along the first straight line, and raised towards the surface of the aforementioned mounting plate portion along the sixth straight line, A first side plate portion is separated by the fifth straight line, the seventh straight line and the third outer surface, folded back to the back surface of the aforementioned mounting plate portion along the second and seventh straight lines, and raised towards the surface side of the aforementioned mounting plate portion along the fifth straight line, A second side plate portion is separated by the sixth straight line, the seventh straight line and the fourth outer surface, folded back to the back surface of the aforementioned mounting plate portion along the second and seventh straight lines, and raised towards the surface side of the aforementioned mounting plate portion along the sixth straight line, A folded plate portion is demarcated by the fifth straight line, the sixth straight line, the seventh straight line and the second outer surface, and is folded back to the back surface of the plate portion described above along the seventh straight line, It is divided by the first straight line, the fifth straight line, the sixth straight line and the seventh straight line, and has a packaging window opening that penetrates the second flat plate in the thickness direction of the flat plate body and opens on the surface and back surface of the second flat plate, The aforementioned retaining sheet is It covers the aforementioned packaging window opening and is fixed to the aforementioned folded plate portion and the previously described mounting plate portion, The second flat plate is folded back onto the first flat plate, thereby pressing against the object to be packaged placed on the surface of the plate portion described above. The first leg plate portion is, As the first outer plate portion rises along the third straight line, it rises down from the back surface of the aforementioned mounting plate portion and protrudes from the folded plate portion that is folded back onto the back surface of the aforementioned mounting plate portion. The aforementioned second leg plate section is, The second outer plate portion is raised along the fourth straight line, causing it to rise from the back surface of the aforementioned mounting plate portion and protrude from the folded plate portion that is folded back onto the back surface of the aforementioned mounting plate portion. Packaging cushioning material characterized by the following:

2. The second plate is, In the length direction of the board, the first sheet pressing plate portion is connected to the first inner board portion with a first pressing plate spacing in the first straight line and a second pressing plate spacing in the seventh straight line, and in the width direction of the board, the first sheet pressing plate portion protrudes from the fifth straight line into the packaging window hole, In the length direction of the plate, the second inner plate portion is connected to the first straight line at a distance of the third pressing plate spacing and to the seventh straight line at a distance of the fourth pressing plate spacing, and in the width direction of the plate, the second sheet pressing plate portion is connected to the first sheet pressing plate portion at a distance of the sheet pressing plate spacing and protrudes from the sixth straight line to the packaging window hole, The aforementioned retaining sheet is It covers the aforementioned packaging window opening and is positioned on the surface of the first and second inner plate sections, the surface of the folded plate section, the surface of the first and second sheet-holding plate sections, and the surface of the aforementioned mounting plate section. The first and second inner plate portions, the folded plate portion, and the previously described mounting plate portion are fixed to each other. The first sheet retaining plate portion is, The first inner plate portion along the fifth straight line is raised, causing it to be lowered and pressed against the retaining sheet. The second sheet retaining plate portion is, The second inner plate portion, which is raised along the sixth straight line, is lowered and pressed against the pressing sheet. The packaging cushioning material according to feature 1.

3. A flat plate body formed in the shape of a flat plate having a plate length, plate width, and plate thickness, and a pressing sheet are provided. The aforementioned flat plate body is It comprises a first flat plate and a second flat plate that is folded back onto the surface of the first flat plate, The first plate is, Mounting plate section, In the width direction of the flat plate body, a first outer plate portion is arranged continuously with one end of the width of the aforementioned mounting plate portion, connected to the aforementioned mounting plate portion, and raised on the surface side of the aforementioned mounting plate portion. In the width direction of the plate, a second outer plate portion is arranged continuously with the other end of the width of the aforementioned mounting plate portion, connected to the aforementioned mounting plate portion, and raised on the surface side of the aforementioned mounting plate portion. In the width direction of the plate, a first leg hole is provided, which is located on one end of the width of the aforementioned mounting plate portion, and in the thickness direction of the flat plate body, penetrates the aforementioned mounting plate portion and is opened on the surface and back surface of the aforementioned mounting plate portion. In the width direction of the plate, the first leg hole is positioned at a distance from the other end of the width of the plate portion described above, and in the thickness direction of the plate, the second leg hole penetrates the plate portion described above and is opened on the surface and back surface of the plate portion described above. A first leg plate portion is connected to the first outer plate portion and protrudes from the first outer plate portion to the first leg hole portion in the plate width direction, It has a second leg plate portion connected to the second outer plate portion and projecting from the second outer plate portion to the second leg hole portion in the plate width direction, The second plate is, In the lengthwise direction of the flat plate body, a first inner plate portion is connected to the first outer plate portion, folded back onto the surface of the first outer plate portion, and raised towards the surface side of the aforementioned mounting plate portion, In the width direction of the plate, the second inner plate portion is positioned opposite the first inner plate portion with an inner plate spacing between them, and in the length direction of the plate, it is connected to the second outer plate portion, folded back onto the surface of the second outer plate portion, and raised up toward the surface side of the aforementioned mounting plate portion. In the length direction of the plate, the first inner plate portion is positioned between the first outer plate portion and connected to the first inner plate portion, the first side plate portion is folded back to the back surface of the aforementioned mounting plate portion, and the first side plate portion is raised towards the front surface of the aforementioned mounting plate portion, In the length direction of the plate, the second inner plate portion is positioned between the second outer plate portion and connected to the second inner plate portion, and the second side plate portion is folded back to the back surface of the aforementioned mounting plate portion and raised towards the front surface side of the aforementioned mounting plate portion, A folded-back plate portion is positioned between the first and second side plate portions and connected to the first and second side plate portions, and is folded back to the back surface of the plate portion described above, It has a packaging window opening that is partitioned by the mounting plate portion, the first and second inner plate portions, and the folded plate portion, The aforementioned retaining sheet is It covers the aforementioned packaging window opening and is fixed to the aforementioned folded plate portion and the previously described mounting plate portion, The second flat plate is folded back onto the first flat plate, thereby pressing against the article placed on the surface of the plate portion described above. The first leg plate portion is, As the first outer plate portion is raised, it is lowered from the back surface of the aforementioned mounting plate portion and protrudes from the folded plate portion that is folded back onto the back surface of the aforementioned mounting plate portion. The aforementioned second leg plate section is, The second outer plate portion is raised, causing it to rise from the back surface of the aforementioned mounting plate portion and protrude from the folded plate portion that is folded back onto the back surface of the aforementioned mounting plate portion. Packaging cushioning material characterized by the following:

4. The second plate is, A first sheet-holding plate portion is connected to the first inner plate portion and protrudes from the first inner plate portion to the packaging window hole in the width direction of the plate, The second inner plate portion is connected to the first inner plate portion and has a second sheet pressing plate portion that protrudes from the second inner plate portion to the packaging window hole in the width direction of the plate, separated from the first sheet pressing plate portion by the sheet pressing plate spacing, The aforementioned retaining sheet is It covers the aforementioned packaging window opening and is positioned on the surface of the first and second inner plate sections, the surface of the folded plate section, the surface of the first and second sheet-holding plate sections, and the surface of the aforementioned mounting plate section. The first and second inner plate portions, the folded plate portion, and the previously described mounting plate portion are fixed to each other. The first sheet retaining plate portion is, The first inner plate portion is raised, causing it to be lowered and pressed against the pressing sheet. The second sheet retaining plate portion is, The second inner plate portion is raised, causing it to be lowered and pressed against the pressing sheet. The packaging cushioning material according to feature 3.

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