Packaging case member

Abstract

To package a product of a desired size by utilizing a cushioning material formed by using a mold from a pulp molding material by a pulp molding method.SOLUTION: The packaging case member 2 includes a case body side 2A formed from a corrugated board material, and a first buffer material 1 formed from a pulp mold-based material by a pulp molding method using a mold, wherein the case body side 2A includes a first buffer material attached hole 101A, 101B into which the first buffer material 1 is inserted, a first cover portion 103 including a first cover body portion 104 to be bent to cover the first buffer material 1 and a first fitting portion 105106 extending from the first cover body portion 104, and a first fitted hole 107108 to be fitted with the first fitting portion 105106 by bending the first fitting portion 105106.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a packing case member having a case body and a cushioning material fixed to the case body. [Background technology]

[0002] Conventionally, cushioning materials formed into a desired shape by a pulp molding method have been widely used as cushioning materials for packaging. The cushioning materials formed by the pulp molding method are placed between a packing case and an object to be packed, and absorb impacts on the object when the packing case containing the object is dropped, for example. A cushioning material formed by the pulp molding method is disclosed in Patent Document 1, for example.

[0003] The conventional cushioning material for packaging disclosed in Patent Document 1 is made by pulp molding, and the case components and the protrusions that act as cushioning parts for sandwiching the packaged items during packaging are integrally molded. The tip of the protrusion is curved into a hemispherical shape, and an opening is formed on one side cut vertically. A cushioning material with this configuration can exert the desired cushioning effect in response to a single impact load. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-219144 Summary of the Invention [Problem to be solved by the invention]

[0005] However, cushioning materials for packaging molded using the pulp molding method are usually used for small products such as A4 printers, and not for large products such as A3 multifunction devices, with foamed polyethylene or laminated cardboard usually being used as cushioning materials for large products. This is because the pulp molding method requires the use of a mold, and therefore cushioning materials for packaging molded using the pulp molding method can usually only be made up to a size of about 600 mm x 600 mm.

[0006] The present invention has been made in consideration of the above points, and makes it possible to package products of a desired size, such as large products, by utilizing cushioning material formed using a mold from a pulp molded material by a pulp molding method. [Means for solving the problem]

[0007] A packing case member according to one aspect of the present invention is a packing case member comprising: a case body made of corrugated cardboard; and a cushioning material formed by a pulp molding method using a mold from a pulp mold-based material and fixed to the case body, wherein the cushioning material comprises a first surface portion having a flat first surface, and a cushioning portion having a cylindrical portion extending from an outer peripheral edge of the first surface portion to the other side of the first surface portion and a flange portion extending from an end of the cylindrical portion opposite to the first surface portion side and parallel to the first surface of the first surface portion in an outward direction, and the case body comprises a main body portion and a cushioning material fixing portion formed on the main body portion and fixing the cushioning material, The shock absorber fixing portion penetrates the main body portion and comprises a cushioning material mounting hole into which the cushioning material is inserted from the first surface portion side; a cover main body portion having a portion of its periphery connected to the main body portion and the remaining portion cut off from the main body portion, the cover portion being bent at the portion to cover at least a portion of the surface opposite the first surface portion side of the flange portion of the cushioning material inserted into the cushioning material mounting hole; and a fitting portion extending from the cover main body portion toward the outside of the cover main body portion; and a fitting hole that penetrates the main body portion and is bent at the boundary between the cover main body portion and the fitting portion to fit the fitting portion. [Effects of the Invention]

[0008] According to the present invention, by making the case body and the cushioning material fixed to the case body separate and using corrugated cardboard for the case body, which can be made in a variety of sizes from small to large, it is possible to package products of desired sizes, such as large products, with a packaging case component comprising the case body and the cushioning material fixed to the case body. Furthermore, the cushioning material fixing portion formed on the case body has a simple structure comprising a cushioning material mounting hole into which the cushioning material is inserted, a covering portion comprising a covering main body portion that is folded to cover the cushioning material and a fitting portion extending from the covering main body portion, and a fitting hole into which the fitting portion is fitted by folding, and the cushioning material fixing portion with a simple structure allows the cushioning material to be reliably fixed to the case body. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of an object packed in two packing case members according to a first embodiment of the present invention; FIG. [Figure 2] 2(a) is a perspective view of one of the packing case members in FIG. 1, and FIG. 2(b) is a perspective view of the one of the packing case members as seen from a different direction from that in FIG. [Figure 3] 2 is a right side view of one of the packing case members of FIG. 1. FIG. [Figure 4] 10 is a perspective view of another state in which an object to be packed is packed with two packing case members. FIG. [Figure 5] FIG. 4(a) is a perspective view of the first cushioning material of FIGS. 2 and 3, and FIG. 4(b) is a perspective view of the first cushioning material as seen from a different direction from that of FIG. [Figure 6] FIG. 6 is a plan view of the first cushioning material of FIG. 5. [Figure 7] 7 is a cross-sectional view of the first cushioning material taken along line AA in FIG. 6. [Figure 8] FIG. 4(a) is a perspective view of the second cushioning material of FIGS. 2 and 3, and FIG. 4(b) is a perspective view of the second cushioning material as seen from a different direction from that of FIG. [Figure 9] FIG. 9 is a plan view of the second cushioning material of FIG. 8. [Figure 10] 10 is a cross-sectional view of the second cushioning material taken along line BB in FIG. 9. [Figure 11] 2 is a development view of a case body constituting one of the packing case members of FIG. 1. FIG. [Figure 12] 10A to 10C are diagrams illustrating an example of a procedure for a worker to fix a cushioning material to a case body. [Figure 13] 12 is a cross-sectional view of the cushioning material and the corrugated cardboard material in a state where the first cushioning material of FIGS. 5 to 7 is fixed to the case body of FIG. 11. FIG. [Figure 14] 12 is a cross-sectional view of the second cushioning material of FIGS. 8 to 10 and the corrugated cardboard sheet in a state where the second cushioning material of FIGS. 8 to 10 is fixed to the case body of FIG. 11. FIG. [Figure 15] FIG. 10 is a cross-sectional view of a first cushioning material used in a packing case member according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] First Embodiment Hereinafter, packing case members 2 and 3 according to a first embodiment of the present invention will be described with reference to the drawings.

[0011] First, the packing case members 2 and 3 of the first embodiment of the present invention will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a perspective view of the packing case members 2 and 3 in a state where an object to be packed 4 is packed therein. Fig. 2(a) is a perspective view of one of the packing case members 2 in Fig. 1, and Fig. 2(b) is a perspective view of one of the packing case members 2 as seen from a different direction than Fig. 2(a). Fig. 3 is a right side view of one of the packing case members 2 in Fig. 1.

[0012] The packing case member 2 comprises a case body 2A formed from a corrugated cardboard material (for example, a cardboard made by bonding together flat paper (liner) and corrugated paper (core) with an adhesive), and a cushioning material (hereinafter referred to as "first cushioning material") 1 formed using a mold from a pulp mold material by a pulp molding method and fixed to the case body 2A. The packing case member 2 further comprises a cushioning material 5 (hereinafter referred to as "second cushioning material") different from the first cushioning material 1.

[0013] The packing case member 3 includes a case body 3A formed from a corrugated cardboard plate material, and a cushioning material (first cushioning material) 1 formed from a pulp mold material using a mold by a pulp molding method and attached to the case body 3A. The packing case member 3 further includes a cushioning material (second cushioning material) 5 separate from the first cushioning material 1.

[0014] As shown in FIG. 1, a packing case member 2 and a packing case member 3 sandwich a packaged object 4 such as a multifunction printer from the left and right sides to pack the packaged object 4.

[0015] 2(a), (b) and 3, in the packing case member 2, the first and second cushioning materials 1, 5 are attached to the case main body 2A so that first surface portions 11, 51, which will be described later, of the first and second cushioning materials 1, 5 are positioned on the side that comes into contact with the packaged item 4. In addition, in the packing case member 3, the first and second cushioning materials 1, 5 are attached to the case main body 3A so that first surface portions 11, 51, which will be described later, of the first and second cushioning materials 1, 5 are positioned on the side that comes into contact with the packaged item 4.

[0016] As shown in FIG. 4, the first and second cushioning materials 1 and 5 may be attached to the case bodies 2A and 3A of the packing case members 2 and 3 so that the first surface portions 11 and 51 described later of the first and second cushioning materials 1 and 5 are positioned on the side of the object to be hit and the flange portions 15 and 55 described later of the first and second cushioning materials 1 and 5 are positioned on the side of the object to be packaged 4, and the object to be packaged 4 may be sandwiched between the packing case members 2 and 3 on the left and right.

[0017] Next, the first cushioning material 1 in Figures 2 and 3 will be described with reference to Figures 5 to 7. Figure 5(a) is a perspective view of the first cushioning material 1 in Figures 2 and 3, and (b) is a perspective view of the first cushioning material 1 seen from a different direction than (a). Figure 6 is a plan view of the first cushioning material 1 in Figure 5. Figure 7 is a cross-sectional view of the first cushioning material 1 taken along line AA in Figure 6.

[0018] As described above, the first cushioning material 1 is formed using a mold from a pulp mold material by the pulp molding method. The first cushioning material 1 includes a first surface portion 11, a first cushioning portion 12, and a second cushioning portion 13.

[0019] The first surface of the first surface portion 11 is a flat surface. In the first embodiment, the first surface portion 11 has an annular shape with a circular hole formed in the center.

[0020] The first buffer section 12 has a cylindrical first cylindrical portion 14 that extends from the outer peripheral edge of the first surface section 11 to the other side of the first surface section 11, and a flange portion 15 that extends parallel to the first surface of the first surface section 11 and outward from the end of the first cylindrical portion 14 opposite the first surface section 11 side. In the first embodiment, the first cylindrical portion 14 is cylindrical, and the flange portion 15 is annular. The surface of the flange portion 15 opposite the first surface section 11 side is a flat surface that is parallel to the first surface of the first surface section 11.

[0021] The dimension of the first buffer portion 12 in the direction of the perpendicular p1 to the first surface of the first surface 11 is h1. The first thickness of the first cylindrical portion 14 (the distance between the outer wall surface and the inner wall surface of the first cylindrical portion 14 in the direction of the perpendicular to the outer wall surface and the inner wall surface of the first cylindrical portion 14) is constant t1. The first cylindrical portion 14 is inclined at a first angle α1 with respect to the perpendicular p1 to the first surface of the first surface 11 so that the diameter of the first cylindrical portion 14 increases with increasing distance from the first surface 11. The first angle α1 is the draft angle when the buffer material 1 is removed from the mold toward the other side of the first surface 11 to form the first cylindrical portion 14. The first angle α1 is, for example, 5 degrees. The diameter of the first cylindrical portion 14 at the point farthest from the first surface 11 (the maximum outer diameter of the first cylindrical portion 14) is r1.

[0022] The second buffer section 13 is provided inside the first cylindrical section 14 of the first buffer section 12, and has a cylindrical second cylindrical section 16 extending from the inner peripheral edge of the first surface section 11 to the other side of the first surface section 11, and a second surface section 17 extending inwardly and parallel to the first surface of the first surface section 11 from the end of the second cylindrical section 16 opposite the first surface section 11 side. In the first embodiment, the second cylindrical section 16 is cylindrical, and the second surface section 17 is circular. The surface of the second surface section 17 opposite the first surface section 11 side is a flat surface parallel to the first surface of the first surface section 11.

[0023] The dimension of the second buffer portion 13 in the direction of the perpendicular p1 to the first surface of the first surface 11 is h2. The second thickness of the second cylindrical portion 14 (the distance between the outer wall surface and the inner wall surface of the second cylindrical portion 16 in the direction of the perpendicular to the outer wall surface and the inner wall surface of the second cylindrical portion 16) is constant at t2. The second cylindrical portion 16 is inclined at a second angle α2 with respect to the perpendicular p1 to the first surface of the first surface 11 so that the diameter of the second cylindrical portion 16 increases as it approaches the first surface 11. The second angle α2 is the draft angle when the buffer material 1 is removed from the mold toward one side of the first surface 11 to form the second cylindrical portion 16. The second angle α2 is, for example, 5 degrees.

[0024] In the first embodiment, the dimension h1 of the first surface of the first surface 11 of the first buffering section 12 in the direction of the perpendicular p1 is the same as the dimension h2 of the first surface of the first surface 11 of the second buffering section 13 in the direction of the perpendicular p1 (h1 = h2). In other words, the end of the first buffering section 12 opposite the first surface 11 side (the surface of the flange portion 15 of the first buffering section 12 opposite the first surface 11 side) and the end of the second buffering section 13 opposite the first surface 11 side (the surface of the second surface portion 17 of the second buffering section 13 opposite the first surface 11 side) are on the same plane parallel to the first surface of the first surface 11. By setting these dimensions, an impact load is applied to the first buffering section 12 and the second buffering section 13 simultaneously.

[0025] The first thickness t1 of the first cylindrical portion 14 and the second thickness t2 of the second cylindrical portion 16 are the same (t1=t2).

[0026] The first angle α1 of the first cylindrical portion 14 and the second angle α2 of the second cylindrical portion 16 are the same (α1=α2).

[0027] Next, the second cushioning material 5 of Figures 2 and 3 will be described with reference to Figures 8 to 10. Figure 8(a) is a perspective view of the second cushioning material 5 of Figures 2 and 3, and (b) is a perspective view of the second cushioning material 5 seen from a different direction than (a). Figure 9 is a plan view of the second cushioning material 5 of Figure 8. Figure 10 is a cross-sectional view of the second cushioning material 5 of Figure 9 taken along line BB.

[0028] As described above, the second cushioning material 5 is formed from a pulp mold material using a mold by the pulp molding method. The second cushioning material 5 includes a first surface portion 51 and a cushioning portion 52.

[0029] The first surface of the first surface portion 51 is a flat surface. In the first embodiment, the first surface portion 51 has a circular shape.

[0030] The buffer section 52 has a cylindrical portion 54 that extends from the outer peripheral edge of the first surface section 51 to the other side of the first surface section 51, and a flange portion 55 that extends parallel to the first surface of the first surface section 11 and outward from the end of the cylindrical portion 54 opposite the first surface section 11 side. In the first embodiment, the cylindrical portion 54 is cylindrical, and the flange portion 55 is annular. The surface of the flange portion 55 opposite the first surface section 51 side is a flat surface that is parallel to the first surface of the first surface section 51.

[0031] The dimension of the buffer section 52 in the direction of the perpendicular p2 to the first surface of the first surface 51 is h5. The thickness of the cylindrical section 54 (the distance between the outer wall surface and the inner wall surface of the cylindrical section 54 in the direction of the perpendicular to the outer wall surface and the inner wall surface of the cylindrical section 54) is constant at t5. The cylindrical section 54 is inclined at an angle α5 with respect to the perpendicular p2 to the first surface of the first surface 51 so that the diameter of the cylindrical section 54 increases with increasing distance from the first surface 51. The angle α5 is the draft angle when the second buffer material 5 is removed from the mold toward the other side of the first surface 51 to form the cylindrical section 54. The angle α5 is, for example, 5 degrees. The diameter of the cylindrical section 54 at the point farthest from the first surface 51 (the maximum outer diameter of the cylindrical section 54) is r5.

[0032] In the first embodiment, the maximum dimension r1 of the outer diameter of the first cylindrical portion 14 of the first cushioning material 1 is larger than the maximum dimension r5 of the outer diameter of the cylindrical portion 54 of the second cushioning material 5 (r1>r5). Note that the maximum dimension r1 of the outer diameter of the first cylindrical portion 14 and the maximum dimension r5 of the outer diameter of the cylindrical portion 54 may be the same (r1=r5), or the maximum dimension r5 of the outer diameter of the cylindrical portion 54 may be larger than the maximum dimension r1 of the outer diameter of the first cylindrical portion 14 (r5>r1).

[0033] In the first embodiment, the thickness of the flange portion 15 of the first cushioning material 1 and the thickness of the flange portion 55 of the second cushioning material 5 are the same, and the dimension h1 in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the first cushioning section 12 of the first cushioning material 1 and the dimension h5 in the direction of the perpendicular line p2 to the first surface of the first surface portion 51 of the cushioning section 52 of the second cushioning material 5 are the same (h1 = h5). By doing so, when the first cushioning material 1 and the second cushioning material 5 are fixed to the case main bodies 2A and 3A, the first surface of the first surface portion 11 of the first cushioning material 1 and the first surface of the first surface portion 51 of the second cushioning material 5 are on the same plane, and the surface of the flange portion 15 of the first cushioning material 1 opposite to the first surface portion 11 side and the surface of the flange portion 55 of the second cushioning material 5 opposite to the first surface portion 51 side are also on the same plane. As a result, an impact load is simultaneously applied to the first buffer section 12 of the first buffer material 1 and the buffer section 52 of the second buffer section 5. As a result, the first buffer material 1 and the second buffer material 5 are less likely to collapse, and can exhibit a buffering effect in response to a large impact load.

[0034] For example, the thickness of the flange portion 15 of the first cushioning material 1 and the thickness of the flange portion 55 of the second cushioning material 5 may be the same, but the dimension h1 in the direction of the perpendicular p1 to the first surface of the first surface 11 of the first cushioning section 12 of the first cushioning material 1 may be different from the dimension h5 in the direction of the perpendicular p2 to the first surface of the first surface 51 of the cushioning section 52 of the second cushioning material 5 (h1≠h5). In this case, the dimension h1 may be larger than the dimension h5 (h1>h5), or the dimension h5 may be larger than the dimension h1 (h5>h1). In this case, the impact load is first applied to either the first cushioning section 12 of the first cushioning material 1 or the cushioning section 52 of the second cushioning material 5, and the one to which the impact load is applied first collapses, and then the impact load is applied to the other cushioning section. Therefore, the way in which the impact load is received can be adjusted depending on the mass and impact resistance of the packaged item.

[0035] The crushability of the cylindrical portion 54 of the second cushioning material 5 varies depending on the thickness t5 of the cylindrical portion 54, so by changing the thickness t5, it is possible to prepare many second cushioning materials 5 that can exhibit a cushioning effect against different impact loads.

[0036] Furthermore, since the ease with which the cylindrical portion 54 of the second cushioning material 5 is crushed varies depending on the angle α5 of the cylindrical portion 54, by changing the angle α5, it is possible to prepare many second cushioning materials 5 with different impact loads that can exert a cushioning effect.

[0037] Furthermore, since the crushability of the cylindrical portion 54 of the second cushioning material 5 varies depending on the maximum outer diameter dimension r5 of the cylindrical portion 54, by changing the maximum dimension r5, it is possible to prepare many second cushioning materials 5 with different impact loads that can exert an impact effect.

[0038] Next, the case body 2A to which the first cushioning material 1 shown in Figures 5 to 7 and the second cushioning material 5 shown in Figures 8 to 10 are attached will be described with reference to Figure 11. Figure 11 is a development view of the case body 2A that constitutes one of the packing case members 2 in Figure 1.

[0039] The case body 2A of the packing case member 2 is formed from a corrugated cardboard sheet and, more specifically, assembled by folding the corrugated cardboard sheet. The case body 2A has a main body portion 20A and cushioning material fixing portions 100, 200, 300, 400, etc., which are formed on the main body portion 20A and fix the first and second cushioning materials 1 and 5. The cushioning material fixing portion 100 fixes the first cushioning material 1 to the case body 2A, and will be referred to as the "first cushioning material fixing portion" below as appropriate. The cushioning material fixing portion 200 fixes the second cushioning material 5 to the case body 2A, and will be referred to as the "second cushioning material fixing portion" below as appropriate. Because the basic structure for fixing the first cushioning material 1 to the case body 2A by the first cushioning material fixing portion is similar, in this embodiment only the first cushioning material fixing portion 100 will be described, and because the basic structure for fixing the second cushioning material 5 to the case body 2A by the second cushioning material fixing portion is similar, in this embodiment only the second cushioning material fixing portion 200 will be described. The case body 3A provided in the packing case member 3 has a main body portion and cushioning material fixing portions formed on the main body portion for fixing the first and second cushioning materials 1 and 5, and the cushioning material fixing portions include a cushioning material fixing portion (having the same basic fixing structure as the first cushioning material fixing portion) that fixes the first cushioning material 1 to the case body 3A, and a cushioning material fixing portion (having the same basic fixing structure as the second cushioning material fixing portion) that fixes the second cushioning material 5 to the case body 3A.

[0040] As described above, the first cushioning material fixing portion 100 is a cushioning material fixing portion that fixes the first cushioning material 1 to the case main body 2A. The first cushioning material fixing portion 100 penetrates the main body portion 20A and has first cushioning material mounting holes 101A and 101B into which the first cushioning material 1 is inserted from the first surface portion 11 side. In the first embodiment, the first cushioning material 1 is inserted into the first cushioning material mounting holes 101A and 101B until the surface of the flange portion 15 on the first surface portion 11 side reaches the main body portion 20A. The dimensions of the first cushioning material mounting holes 101A and 101B correspond to the maximum outer diameter r1 of the first cylindrical portion 14 of the first cushioning material 1. The first cushioning material fixing portion 100 has first protrusions 102A and 102B that protrude from the edges of the first cushioning material mounting holes 101A and 101B inward of the first cushioning material mounting holes 101A and 101B.

[0041] In the first embodiment, the first cushioning material mounting holes 101A, 101B have a circular shape in a plan view, and the diameter of the first cushioning material mounting holes 101A, 101B is larger than the maximum dimension r1 of the outer diameter of the first cylindrical portion 14 of the first cushioning material 1 and smaller than the outer diameter of the flange portion 15. Note that, for example, if the first protrusions 102A, 102B are not provided, the diameter of the first cushioning material mounting holes 101A, 101B may be approximately the same as the maximum dimension r1 of the outer diameter of the first cylindrical portion 14.

[0042] There are four first protrusions 102A, 102B, and the diameter of the circle connecting the tips of the four first protrusions 102A, 102 is larger than the outer diameter of the annular first surface portion 11 of the first cushioning material 1 and smaller than the maximum dimension r1 of the outer diameter of the first cylindrical portion 14.

[0043] By setting the first cushioning material mounting holes 101A, 101B and the first protrusions 102A, 102B to the above dimensions, when the first cushioning material 1 is inserted into the first cushioning material mounting holes 101A, 101B from the first surface portion 11 side of the first cushioning material 1, first the first cylindrical portion 14 of the first cushioning portion 12 of the first cushioning material 1 gets caught on the four first protrusions 102A, 102B, and when the first cushioning material 1 is further inserted into the first cushioning material mounting holes 101A, 101B, the flange portion 15 of the first cushioning material 1 gets caught on the main body portion 20A around the first cushioning material mounting holes 101A, 101B. The four first protrusions 102A, 102B serve to prevent the first cushioning material 1 from slipping out.

[0044] The first cushioning material fixing part 100 has a portion (folding line FL1) of its periphery connected to the main body part 20A, and the rest of the portion (folding line FL1) is cut off from the main body part 20A, and has a first covering part 103 which is folded at the portion (folding line FL1) to cover at least a portion of the surface opposite to the first surface part 11 of the flange part 15 of the first cushioning material 1 inserted into the first cushioning material mounting holes 101A, 101B, and which has first fitting parts 105, 106 which extend from the first covering main body part 104 in the outward direction of the first covering main body part 104. The first fitting parts 105, 106 become wider the further they are from the first covering main body part 104.

[0045] The first cushioning fixing portion 100 penetrates the main body portion 20A and has first fitting holes 107, 108 that are bent at the boundary between the first covering main body portion 104 and the first fitting portions 105, 106 and into which the first fitting portions 105, 106 are fitted. When the first covering main body portion 104 is bent approximately 180 degrees at the bending line FL1 and the first fitting portions 105, 106 are not bent at the boundary between the first covering main body portion 104 and the first fitting portions 105, 106, the first fitting portions 105, 106 and the first fitting holes 107, 108 overlap with each other. Furthermore, the first fitting portions 105, 106 and the first fitting holes 107, 108 are sized so that when the first fitting portions 105, 106 are fitted into the first fitting holes 107, 108, the first fitting portions 105, 106 do not easily come out of the first fitting holes 107, 108. For example, when the first covering main body portion 104 is bent approximately 180 degrees at the bend line FL1 and the first mating portions 105, 106 are not bent at the boundary between the first covering main body portion 104 and the first mating portions 105, 106, with regard to the side-direction dimensions of the side where the first covering main body portion 104 and the first mating portions 105, 106 meet, the width of the tip of the first mating portions 105, 106 is wider than the width of the first mating holes 107, 108, and the width of the base of the first mating portions 105, 106 is the same as or narrower than the width of the first mating holes 107, 108.

[0046] The above-described first cushioning material fixing part 100 has two first cushioning material mounting holes 101A and 101B as first cushioning material mounting holes, but the number of first cushioning material mounting holes may be one, or three or more.

[0047] As described above, the second cushioning material fixing portion 200 is a cushioning material fixing portion that fixes the second cushioning material 5 to the case main body 2A. The second cushioning material fixing portion 200 penetrates the main body portion 20A and has a cushioning material mounting hole 201 into which the second cushioning material 5 is inserted from the first surface portion 51 side. In the first embodiment, the second cushioning material 5 is inserted into the second cushioning material mounting hole 201 until the surface of the flange portion 55 on the first surface portion 51 side reaches the main body portion 20A. The dimension of the second cushioning material mounting hole 201 corresponds to the maximum dimension r5 of the outer diameter of the cylindrical portion 54 of the second cushioning material 5. The second cushioning material fixing portion 200 has a second protrusion 202 that protrudes from the edge of the second cushioning material mounting hole 201 toward the inside of the second cushioning material mounting hole 201.

[0048] In the first embodiment, the second cushioning material mounting hole 201 has a circular shape when viewed in a plane, and the diameter dimension of the second cushioning material mounting hole 201 is larger than the maximum dimension r5 of the outer diameter of the cylindrical portion 54 of the second cushioning material 5 and smaller than the outer diameter dimension of the flange portion 55.

[0049] There are four second protrusions 202, and the diameter of the circle connecting the tips of the four second protrusions 202 is larger than the diameter of the circular first surface portion 51 of the second cushioning material 5 and smaller than the maximum dimension r5 of the outer diameter of the cylindrical portion 54 of the second cushioning material 5.

[0050] By setting the second cushioning material mounting hole 201 and the second protrusions 202 to the above dimensions, when the second cushioning material 5 is inserted into the second cushioning material mounting hole 201 from the first surface portion 51 side of the second cushioning material 5, first, the cylindrical portion 54 of the cushioning portion 52 of the second cushioning material 5 gets caught on the four second protrusions 202, and when the second cushioning material 5 is further inserted into the second cushioning material mounting hole 201, the flange portion 55 of the second cushioning material 5 gets caught on the main body portion 20A around the second cushioning material mounting hole 201. The four second protrusions 202 play a role in preventing the second cushioning material 5 from coming out.

[0051] The second cushioning material fixing part 200 has a portion (folding line FL2) of its periphery connected to the main body part 20A, and the rest of the portion (folding line FL2) is cut off from the main body part 20A, and has a second covering part 103 including a second covering main body part 204 that is folded at the portion (folding line FL2) and covers at least a portion of the surface opposite to the first surface part 51 of the flange part 55 of the second cushioning material 5 inserted into the second cushioning material mounting hole 201, and second fitting parts 205, 206 that extend from the second covering main body part 204 in the outward direction of the second covering main body part 204. The second fitting parts 205, 206 become wider the further they are from the second covering main body part 204.

[0052] The second cushioning material fixing portion 200 penetrates the main body portion 20A, and has second fitting holes 207, 208 that are bent at the boundary between the second covering main body portion 204 and the second fitting portions 205, 206 and into which the second fitting portions 205, 206 are fitted. When the second covering main body portion 104 is bent approximately 180 degrees at the bending line FL2 and the second fitting portions 205, 206 are not bent at the boundary between the second covering main body portion 204 and the second fitting portions 205, 206, the second fitting portions 205, 206 and the second fitting holes 207, 208 overlap with each other. Furthermore, the second fitting portions 205, 206 and the second fitting holes 207, 208 are sized so that when the second fitting portions 205, 206 are fitted into the second fitting holes 207, 208, the second fitting portions 205, 206 do not easily come out of the second fitting holes 207, 208. For example, when the second covering main body portion 204 is bent approximately 180 degrees at the bend line FL2 and the second mating portions 205, 206 are not bent at the boundary between the second covering main body portion 204 and the second mating portions 205, 206, with regard to the side-direction dimensions of the side where the second covering main body portion 204 and the second mating portions 205, 206 meet, the width of the tip of the second mating portions 205, 206 is wider than the width of the second mating holes 207, 208, and the width of the base of the second mating portions 205, 206 is the same as or narrower than the width of the second mating holes 207, 208.

[0053] The second cushioning material fixing portion 200 described above has one second cushioning material mounting hole 201 as the second cushioning material mounting hole, but may have two or more second cushioning material mounting holes.

[0054] As described above, the dimensions of the first cushioning material mounting holes 101A and 101B correspond to the maximum outer diameter r1 of the first cylindrical portion 14 of the first cushioning material 1. The dimensions of the second cushioning material mounting hole 201 correspond to the maximum outer diameter r5 of the cylindrical portion 54 of the second cushioning material 5. As described above, in the first embodiment, the maximum outer diameter r1 of the first cylindrical portion 14 of the first cushioning material 1 is larger than the maximum outer diameter r5 of the cylindrical portion 54 of the second cushioning material 5 (r1>r5). Therefore, in the first embodiment, the dimensions of the first cushioning material mounting holes 101A and 101B are larger than the dimensions of the second cushioning material mounting hole 201 in a plan view. This allows a worker to mount the first cushioning material 1 into the first cushioning material mounting holes 101A and 101B without making any mistakes, and to mount the second cushioning material 5 into the second cushioning material mounting hole 201 without making any mistakes.

[0055] An example of a procedure for a worker to fix the first cushioning material 1 to the case body 2A will be described with reference to Fig. 12. Fig. 12 is a diagram showing an example of a procedure for a worker to fix the first cushioning material 1 to the case body 2A.

[0056] Fig. 12(a) is an enlarged view of the area surrounded by dotted line a in the case main body 2A in Fig. 11. With the case main body 2A in the state shown in Fig. 11(a), the worker inserts the first cushioning material 1 from the first surface 11 side of the first cushioning material 1 into the first cushioning material mounting holes 101A, 101B formed in the main body portion 20A until the first cylindrical portion 104 of the first cushioning portion 102 contacts the first protrusions 102A, 102B and then the surface of the flange portion 15 of the first cushioning material 1 on the first surface 11 side is caught on the main body portion 20A, thereby attaching the first cushioning material 1 to the first cushioning material mounting holes 101A, 101B formed in the main body portion 20A. Fig. 12(b) shows the state in which the first cushioning material 1 is mounted in the first cushioning material mounting holes 101A, 101B formed in the main body portion 20A.

[0057] 12(b) is attached to the first cushioning material attachment holes 101A, 101B formed in the main body portion 20A, the worker folds the first covering main body portion 104 of the first covering portion 103 along the folding line FL1 to cover at least a part of the surface of the flange portion 15 of the first cushioning material 1 inserted into the first cushioning material attachment holes 101A, 101B opposite to the first surface portion 11 with the first covering main body portion 104. FIG. 12(c) shows the state in which the first covering main body portion 104 covers at least a part of the surface of the flange portion 15 of the first cushioning material 1 opposite to the first surface portion 11.

[0058] With the first covering body portion 104 shown in FIG. 12(c) covering at least a portion of the surface of the flange portion 15 of the first cushioning material 1 opposite the first surface portion 11, the worker bends the first fitting portions 105, 106 of the first covering portion 103 at the boundary between the first covering body portion 104 and the first fitting portions 105, 106 to fit them into the first fitting holes 107, 108. This causes the first covering portion 103 to maintain its folded state. FIG. 12(d) shows the state in which the first fitting portions 105, 106 are fitted into the first fitting holes 107, 108. FIG. 13 shows a cross-sectional view of the state shown in FIG. 12(d).

[0059] An example of the procedure by which a worker fixes the second cushioning material 5 to the case body 2A is the same as the procedure by which a worker fixes the first cushioning material 1 to the case body 2A, which has been described with reference to Fig. 12. Fig. 14 shows a cross-sectional view of the second cushioning material 5 fixed to the case body 2A.

[0060] According to the first embodiment, the case bodies 2A, 3A and the first and second cushioning materials 1, 5 fixed to the case bodies 2A, 3A are separate bodies, and corrugated cardboard material that can be made in a variety of sizes from small to large is used for the case bodies 2A, 2B, making it possible to package products of desired sizes, such as large products, using a packaging case member that comprises the case body and the cushioning materials fixed to the case body.

[0061] The first and second cushioning material fixing portions 100, 200 formed on the case body 2A include first and second cushioning material mounting holes 101A, 101B, 201 into which the first and second cushioning materials 1, 5 are inserted, first and second covering body portions 104, 204 that are folded to cover the first and second cushioning materials 1, 5, and first and second fitting portions 105, 106, 205, 206 that extend from the first and second covering body portions 104, 204. It has a simple structure comprising covering portions 103, 203 and first and second mating holes 107, 108, 207, 208 that mate with the first and second mating portions 105, 106, 205, 206 by bending the first and second mating portions 105, 106, 205, 206, and the first and second cushioning material fixing portions 100, 200 with a simple structure enable the first and second cushioning materials 1, 5 to be securely fixed to the case main bodies 2, 3.

[0062] Furthermore, by using the first cushioning material 1 and the second cushioning material 5, which have different crushing sensitivities to impact loads, as the cushioning materials, adjustments can be made according to the mass of the packaged item 4 and impact resistance performance.

[0063] Furthermore, by making the first cushioning material 1 a double structure consisting of the first cushioning section 12 and the second cushioning section 13 provided inside the first cushioning section 12, it is possible to improve the cushioning performance of the cushioning material per amount of material used and per installation space. This makes it possible to make the first cushioning material 1 that can provide a cushioning effect in response to a desired impact load smaller, reducing the cost of materials such as the first cushioning material 1, and also reducing the overall size of the cushioning material 1, packing case members 2 and 3, and packaged item 4 when packaged, thereby achieving a reduction in transportation costs.

[0064] Furthermore, in the first buffer material 1, the dimension h1 in the direction of the perpendicular p1 of the first surface of the first surface 11 of the first buffer section 12 is made the same as the dimension h2 in the direction of the perpendicular p1 of the first surface of the first surface 11 of the second buffer section 13 (h1 = h2). In other words, the plane on which the end of the first buffer section 12 opposite the first surface 11 side is located (the surface of the flange section 15 of the first buffer section 12 opposite the first surface 11 side) and the plane on which the end of the second buffer section 13 opposite the first surface 11 side is located (the surface of the second surface section 17 of the second buffer section 13 opposite the first surface 11 side) are made to be on the same plane parallel to the first surface of the first surface 11. By doing this, the impact load begins to be applied to the first buffer section 12 and the second buffer section 13 simultaneously, making the first buffer section 12 and the second buffer section 13 less likely to collapse, and a small-sized buffer section 1 can exhibit sufficient impact resistance to withstand large impact loads.

[0065] Furthermore, in the first cushioning material 1, the diameter size of the second cylindrical portion 16 of the second cushioning section 13 can be adjusted to suit the mass and impact resistance of the packaged item 4 while maintaining the outer size of the cushioning material 1.

[0066] Second Embodiment A first cushioning material 1A used in packing case members 2 and 3 according to a second embodiment of the present invention will now be described with reference to the drawings. In the first cushioning material 1 of the first embodiment, the dimension h1 of the first surface 11 of the first cushioning section 12 in the direction of perpendicular p1 to the first surface of the first surface 11 of the second cushioning section 13 is the same as the dimension h2 of the first surface 11 of the second cushioning section 13 in the direction of perpendicular p1 to the first surface of the first surface 11 of the second cushioning section 13A, whereas the first cushioning material 1A of the second embodiment differs in that the dimension h2A of the first surface 11 of the second cushioning section 13A in the direction of perpendicular p1 to the first surface of the first surface 11 of the first cushioning section 12A is smaller than the dimension h1A of the first surface 11 of the first cushioning section 12A in the direction of perpendicular p1 to the first surface of the first surface 11 of the first cushioning section 12A (h1A > h2A). Note that in the second embodiment, components similar to those of the first embodiment are designated by the same reference numerals, and descriptions of these components will be omitted.

[0067] The structure of the first cushioning material 1A used in the packing case members 2 and 3 according to the second embodiment of the present invention will be described below with reference to Fig. 15. Fig. 15 is a cross-sectional view of the first cushioning material 1A used in the packing case members 2 and 3 according to the second embodiment of the present invention. Fig. 15 is a cross-sectional view of the first cushioning material 1A taken along a plane including a perpendicular line p1 passing through the center of the first surface portion 11.

[0068] The first cushioning material 1A is formed using a mold from a pulp mold material by a pulp molding method, and includes a first surface portion 11, a first cushioning portion 12A, and a second cushioning portion 13A.

[0069] The first buffer portion 12A has a first cylindrical portion 14A that extends from the outer peripheral edge of the first surface portion 11 to the other side of the first surface portion 11, and a flange portion 15A that extends parallel to the first surface of the first surface portion 11 and outward from the end of the first cylindrical portion 14A opposite the first surface portion 11 side. In the second embodiment, the first cylindrical portion 14A is cylindrical, and the flange portion 15A is annular. The surface of the flange portion 15A opposite the first surface portion 11 side is a flat surface that is parallel to the first surface of the first surface portion 11.

[0070] The dimension of the first buffer portion 12A in the direction of the perpendicular p1 to the first surface of the first surface 11 is h1A. The first thickness of the first cylindrical portion 14A (the distance between the outer wall surface and the inner wall surface of the first cylindrical portion 14A in the direction of the perpendicular to the outer wall surface and the inner wall surface of the first cylindrical portion 14A) is constant t1A. The first cylindrical portion 14A is inclined at a first angle α1A with respect to the perpendicular p1 to the first surface of the first surface 11 so that the diameter of the first cylindrical portion 14A increases with increasing distance from the first surface 11. The first angle α1A is the draft angle when the first buffer material 1A is removed from the mold toward the other side of the first surface 11 to form the first cylindrical portion 14. The first angle α1A is, for example, 5 degrees. The diameter of the first cylindrical portion 14A at the point farthest from the first surface 11 (the maximum diameter of the first cylindrical portion 14) is r1A.

[0071] The second buffer portion 13A is provided inside the first cylindrical portion 14A of the first buffer portion 12A, and has a cylindrical second cylindrical portion 16A extending from the inner peripheral edge of the first surface portion 11 to the other side of the first surface portion 11, and a second surface portion 17A extending in a direction parallel to and inward of the first surface of the first surface portion 11 from an end of the second cylindrical portion 16A on the side opposite to the first surface portion 11 side. In the second embodiment, the second cylindrical portion 16A is cylindrical, and the second surface portion 17A is circular. The surface of the second surface portion 17A on the side opposite to the first surface portion 11 side is a plane parallel to the first surface of the first surface portion 11.

[0072] The dimension in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the second buffer portion 13A is h2A. Also, the second thickness of the second cylindrical portion 14A (the distance between the outer wall surface and the inner wall surface in the perpendicular direction of the outer wall surface and the inner wall surface of the second cylindrical portion 16A) is a constant t2A. Further, the second cylindrical portion 16A is inclined at a second angle α2A with respect to the perpendicular line p1 to the first surface of the first surface portion 11 such that the diameter of the second cylindrical portion 16A increases as it approaches the first surface portion 11. The second angle α2A is the draw gradient when the first buffer material 1A is removed from the mold toward one side of the first surface portion 11 to form the second cylindrical portion 16A. The second angle α2A is, for example, 5 degrees.

[0073] In the second embodiment, the dimension h2A in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the second buffer portion 13A is smaller than the dimension h1A in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the first buffer portion 12A (h2A < h1A). That is, the end on the side opposite to the first surface portion 11 side of the first buffer portion 12A (the surface on the side opposite to the first surface portion 11 side of the flange portion 15A of the first buffer portion 12A) and the end on the side opposite to the first surface portion 11 side of the second buffer portion 13A (the surface on the side opposite to the first surface portion 11 side of the second surface portion 17A of the second buffer portion 13A) are on different planes parallel to the first surface of the first surface portion 11, and the plane on which the end on the side opposite to the first surface portion of the second buffer portion 13A is located (the surface on the side opposite to the first surface portion 11 side of the second surface portion 17A of the second buffer portion 13A) is closer to the first surface portion 11 side than the plane on which the end on the side opposite to the first surface portion 11 side of the first buffer portion 12 is located (the surface on the side opposite to the first surface portion 11 side of the flange portion 15 of the first buffer portion 12). By setting such dimensions, an impact load is applied to the first buffer portion 12A, and then an impact load is applied to the second buffer portion 13A.

[0074] The first thickness t1A of the first cylindrical portion 14A is the same as the second thickness t2A of the second cylindrical portion 16A (t1A = t2A).

[0075] The first angle α1A of the first cylindrical portion 14A is the same as the second angle α2A of the second cylindrical portion 16A (α1A = α2A).

[0076] According to the above-described second embodiment, the dimension h2A in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the second buffer portion 13A is made smaller than the dimension h1A in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the first buffer portion 12A (h2A < h1A). That is, the plane where the end portion on the side opposite to the first surface portion 11 side of the second buffer portion 13A is located (the surface on the side opposite to the first surface portion 11 side of the second surface portion 17A of the second buffer portion 13A) is closer to the first surface portion 11 side than the plane where the end portion on the side opposite to the first surface portion 11 side of the first buffer portion 12A is located (the surface on the side opposite to the first surface portion 11 side of the flange portion 15A of the first buffer portion 12A). By doing so, an impact load is applied to the first buffer portion 12A in the state where it has not been crushed first, and the first buffer portion 12A is crushed to absorb the impact. Then, as the crushing of the first buffer portion 12A increases, an impact load is applied to the second buffer portion 13A in the state where it has not been crushed, and the second buffer portion 13A is crushed to absorb the impact. In this way, first, the impact is absorbed by the first buffer portion 12A, and then the impact is absorbed by the second buffer portion 13A. Thus, with the first buffer material 1A having a small size in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 and the like, it is possible to suppress the magnitude of the impact load applied to the packaged object while exhibiting a sufficient buffering effect corresponding to a large impact load.

[0077] The size of the diameter of the second cylindrical portion 16 of the second buffer portion 13 and the dimension h2A in the direction of the perpendicular line p1 to the first surface of the first surface portion 11 of the second buffer portion 13A enable adjustment according to the mass of the packaged object 4 and the impact resistance performance while maintaining the outer size of the first buffer material 1A.

[0078] ≪First Modification Example of the First and Second Embodiments≫ In the first embodiment described above, the first angle α1 of the first upper cylindrical portion 14 of the first buffering section 12 and the second angle α2 of the second cylindrical portion 16 of the second buffering section 13 are the same (α1 = α2). However, in a first modification of the first embodiment, the first angle α1 and the second angle α2 are different (α1 ≠ α2). When the first angle α1 and the second angle α2 are different (α1 ≠ α2), the first angle α1 may be larger than the second angle α2 (α1 > α2), or the second angle α2 may be larger than the first angle α1 (α2 > α1). The smaller the first and second angles α1 and α2, the less likely the first and second cylindrical portions 14 and 16 of the first and second buffering sections 12 and 13 are to be crushed under impact loads. This allows for the preparation of a larger number of first buffering materials 1 capable of providing buffering effects under different impact loads.

[0079] In the second embodiment described above, the first angle α1A of the first upper cylindrical portion 14A of the first buffer section 12A and the second angle α2A of the second cylindrical portion 16A of the second buffer section 13A are the same (α1A = α2A), but in the first modified example of the second embodiment, the first angle α1A and the second angle α2A are different (α1 ≠ α2). When the first angle α1A and the second angle α2A are different (α1A ≠ α2A), the first angle α1A may be larger than the second angle α2A (α1A > α2A), or the second angle α2A may be larger than the first angle α1A (α2A > α1A). The smaller the first and second angles α1A, α2A, the less the first and second cylindrical portions 14A, 16A of the first and second buffering portions 12A, 13A are able to collapse under impact loads, allowing for fine adjustment of the impact cushioning provided by the first and second buffering portions 12A, 13A.

[0080] For example, when the first angle α1A is made larger than the second angle α2A (α1A > α2A), the first cylindrical portion 14A of the first buffer portion 12A is more likely to collapse under an impact load than the second cylindrical portion 16A of the second buffer portion 13A. Therefore, since the first cylindrical portion 14A of the first buffer portion 12A, which receives the impact load first, is likely to collapse, the first cylindrical portion 14A of the first buffer portion 12A attenuates the impact load with a small attenuation amount while preventing the impact load from being overly applied to the packaged item, and since the second cylindrical portion 16A of the second buffer portion 13A, which receives the impact load later, is less likely to collapse, it attenuates the impact load with a large attenuation amount and can receive the impact load with a small deformation in the direction of the perpendicular line p1 to the first surface of the first surface portion 11.

[0081] <<Second Modification Example of the First and Second Embodiments>> In the above first embodiment, it is assumed that the first thickness t1 of the first cylindrical upper portion 14 of the first buffer portion 12 is the same as the second thickness t2 of the second cylindrical portion 16 of the second buffer portion 13 (t1 = t2). However, in the second modification example of the first embodiment, the first thickness t1 and the second thickness t2 are different (t1 ≠ t2). When the first thickness t1 and the second thickness t2 are different (t1 ≠ t2), the first thickness t1 may be made smaller than the second thickness t2 (t1 < t2), or the second thickness t2 may be made smaller than the first thickness t1 (t2 < t1). The larger the first and second thicknesses t1 and t2 are, the less likely the first and second cylindrical portions 14 and 16 of the first and second buffer portions 12 and 13 are to collapse under an impact load. Therefore, more first buffer materials 1 with different impact loads capable of exerting a buffering effect can be prepared.

[0082] In the above-described second embodiment, it is assumed that the first thickness t1A of the first upper cylinder portion 14A of the first buffer portion 12A is the same as the second thickness t2A of the second cylindrical portion 16A of the second buffer portion 13A (t1A = t2A). However, in the second modification of the second embodiment, the first thickness t1A and the second thickness t2A are different (t1A ≠ t2A). When the first thickness t1A and the second thickness t2A are different (t1A ≠ t2A), the first thickness t1A may be made smaller than the second thickness t2A (t1A < t2A), or the second thickness t2A may be made smaller than the first thickness t1A (t2A < t1A). The larger the first and second thicknesses t1A and t2A are, the less likely the first and second cylindrical portions 14A and 16A of the first and second buffer portions 12A and 13A are to collapse under an impact load. Therefore, the impact buffering by the first and second buffer portions 12A and 13A can be finely adjusted.

[0083] For example, when the first thickness t1A is made smaller than the second thickness t2A (t1A < t2A), the first cylindrical portion 14A of the first buffer portion 12A is more likely to collapse under an impact load than the second cylindrical portion 16A of the second buffer portion 13A. For this reason, the first cylindrical portion 14A of the first buffer portion 12A, which receives the impact load first, is likely to collapse. Thus, the first cylindrical portion 14A of the first buffer portion 12A attenuates the impact load with a small attenuation amount while preventing the impact load from being applied too much to the packaged object. The second cylindrical portion 16A of the second buffer portion 13A, which receives the impact load later, is less likely to collapse. Therefore, the second cylindrical portion 16A can attenuate the impact load with a large attenuation amount and receive the impact load with a small deformation in the direction of the perpendicular line p1 to the first surface of the first surface portion 11.

[0084] ≪Others≫ In the above-described first embodiment, it is assumed that the first angle α1 of the first cylindrical upper part 14 of the first buffer part 12 is the same as the second angle α2 of the second cylindrical part 16 of the second buffer part 13 (α1 = α2), and the first thickness t1 of the first cylindrical upper part 14 of the first buffer part 12 is the same as the second thickness t2 of the second cylindrical part 16 of the second buffer part 13 (t1 = t2). However, the first angle α1 and the second angle α2 may be different (α1 ≠ α2), and the first thickness t1 and the second thickness t2 may also be different (t1 ≠ t2). As combinations in this case, there are (1) α1 > α2 and t1 < t2, (2) α1 > α2 and t1 > t2, (3) α1 < α2 and t1 < t2, and (4) α1 < α2 and t1 > t2.

[0085] In the above-described second embodiment, it is assumed that the first angle α1A of the first cylindrical upper part 14A of the first buffer part 12A is the same as the second angle α2A of the second cylindrical part 16A of the second buffer part 13A (α1A = α2A), and the first thickness t1A of the first cylindrical upper part 14A of the first buffer part 12A is the same as the second thickness t2A of the second cylindrical part 16A of the second buffer part 13A (t1A = t2A). However, the first angle α1A and the second angle α2A may be different (α1A ≠ α2A), and the first thickness t1A and the second thickness t2A may also be different (t1A ≠ t2A). As combinations in this case, there are (1) α1A > α2A and t1A < t2A, (2) α1A > α2A and t1A > t2A, (3) α1A < α2A and t1A < t2A, and (4) α1A < α2A and t1A > t2A.

[0086] Note that the present invention is not limited to the configurations of the above-described embodiments or the above-described modification examples, and various modifications are possible. In addition, the configurations shown by the above-described first embodiment using FIGS. 1 to 14, the configurations shown by the above-described second embodiment using FIG. 15, and the configurations shown by the above-described modification examples are merely one embodiment of the present invention, and the present invention is not intended to be limited to such configurations.

Explanation of Reference Numerals

[0087] 1, 1A First buffer material 5 Second buffer material 11, 51 First surface part 12, 12A First buffer part 13,13A Second Buffer Section 14,14A 1st cylindrical part 15,15A,55 Edge section 16,16A 2nd cylindrical part Page 2 of 17, 17A 52 Buffer Section 54 cylindrical part 100 First Buffer Material Fixing Part 101A, 101B First buffer material removal hole 103 Part 1 104 No. 1 cover body part 105,106 First interlocking part 107, 108 First mating hole 200 Second Buffer Material Fixing Part 201 The second buffer material is removed through the hole. 203 Part 2 204 The second cover body part 205,206 Second interlocking part 207, 208 The second mating hole

Claims

1. a case body formed from a corrugated cardboard material; a cushioning material formed from a pulp mold material using a mold by a pulp molding method and fixed to the case body; A packing case member comprising: The buffer material is a first surface portion having a flat first surface; a buffer section having a cylindrical portion extending from an outer peripheral edge of the first surface section to the other side of the first surface section and a flange portion extending from an end of the cylindrical portion opposite to the first surface section side in an outward direction parallel to the first surface of the first surface section; Equipped with The case body includes: a main body; a buffer fixing portion formed on the main body portion and configured to fix the buffer material; Equipped with The cushioning material fixing portion is a cushioning material mounting hole that penetrates the main body portion and into which the cushioning material is inserted from the first surface portion side; a cover portion, a portion of which is connected to the main body portion and the remaining portion is cut off from the main body portion, the cover portion being folded at the portion to cover at least a portion of the surface opposite to the first surface portion of the flange portion of the cushioning material inserted into the cushioning material mounting hole, and a fitting portion extending from the cover main body portion toward the outside of the cover main body portion; a fitting hole that penetrates the main body portion and is bent at a boundary between the cover main body portion and the fitting portion so that the fitting portion is fitted into the fitting hole; Equipped with Packing case material.

2. A hole is formed in the first surface portion of the buffer material, The buffer material further comprises: another buffer portion provided inside the cylindrical portion of the buffer portion, the another cylindrical portion extending from an inner peripheral edge of the first surface portion to the other side of the first surface portion, and a second surface portion extending inwardly and parallel to the first surface of the first surface portion from an end of the another cylindrical portion opposite to the first surface portion side; The packing case member according to claim 1 , comprising:

3. the packing case member further includes a cushioning material different from the cushioning material, The other buffer material is Another first surface portion, the another first surface being a flat surface; a third buffer portion having a cylindrical third cylindrical portion extending from an outer peripheral edge of the another first surface portion to the other side of the another first surface portion, and a second flange portion extending from an end of the third cylindrical portion opposite to the another first surface portion side in a direction parallel to the another first surface of the another first surface portion and outward; Equipped with the case body further includes a cushioning material fixing part separate from the cushioning material fixing part, The other cushioning material fixing portion is a second buffer material mounting hole that penetrates the main body portion and into which the other buffer material is inserted from the other first surface portion side; a second cover portion, a part of the periphery of which is connected to the main body portion and the remaining part is cut off from the main body portion, the second cover portion being folded at the part to cover at least a part of the surface of the second flange portion of the other cushioning material inserted into the second cushioning material mounting hole opposite to the other first surface portion, and a second fitting portion extending from the second cover main body portion in an outward direction of the second cover main body portion; a second fitting hole that penetrates the main body portion and is bent at a boundary between the second cover main body portion and the second fitting portion so that the second fitting portion is fitted into the second fitting hole; Equipped with the cylindrical portion of the buffer material has a cylindrical shape, the third cylindrical portion of the other buffer material has a cylindrical shape, and a maximum dimension of an outer diameter of the cylindrical portion is different from a maximum dimension of an outer diameter of the third cylindrical portion, the size of the buffer material mounting hole corresponds to the maximum outer diameter of the cylindrical portion, and the size of the second buffer material mounting hole corresponds to the maximum outer diameter of the third cylindrical portion; The packing case member according to claim 1 or 2.

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