Wrapping material and packing material

Abstract

To provide a wrapping material etc., capable of wrapping a wrapped object while tension is applied by partial folding.SOLUTION: A wrapping material 1A comprises a first face part 2 which adjoins one side of a border line 12 and has a bottom plate 3 on which a wrapped object 200A is placed, and a second face part 4 which adjoins the other side of the border line 12 and has a top plate 5 to wrap the wrapped object 200A together with the bottom plate 3 while being folded along the border line 12, wherein the bottom plate 3 and the top plate 5 are rectangular sections such that corners 3a and 5a are in contact with each other along the border line 12, and parts of the first face part 2 and the second face part 4 outside the four sides of the rectangles of the bottom plate 3 and the top plate 5 are folding parts 6 which can be folded along the four sides.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to packaging materials and packaging materials. [Background technology]

[0002] Patent Document 1, Japanese Patent No. 3831991, describes a packaging box formed by folding two blanks formed by punching thick paper or corrugated cardboard, and assembling them together to form a box into a rectangular tube shape using a glue tab.

[0003] Patent Document 2, JP 2007-39052 A, describes a cross-shaped flat cushioning packaging device constructed by gluing tongue pieces provided on both longitudinal wing ends and the middle lower part of an elastic thin film to the upper surface of a base plate of a specified shape through straight punched holes on the back surface. Patent document 2 also describes a cross-shaped flat cushioning packaging device constructed by folding part of the upper end of the upper surface of a base plate of a specified shape in half, and gluing tongues provided on both longitudinal wing ends and the middle lower part of a rectangular elastic thin film through straight punched holes and with a surface adhesive. Furthermore, Patent Document 2 also describes that the above two flat cushioning packaging devices contain the packaged items in a bag made of a sheet of elastic thin film bonded at three points, including part of the widthwise end and both longitudinal ends, to a plate material that can be shaped to have a cushioning structure.

[0004] Patent Document 3, Japanese Patent No. 5417955, describes a paper tray that is formed by assembling a single blank, and has a rectangular bottom plate with side plates rising from the four sides of the bottom plate. Patent document 3 also describes that the above-mentioned paper tray has a standing plate that is connected to a base plate parallel to the bottom plate via a fold line from at least one side plate toward the inside of the tray, and a retaining plate that is connected to at least one side of the side plate and bottom plate and is arranged to cover part of the area surrounded by the side plate, base plate and standing plate and part outside this area. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3831991 (claims 1, 2, figures 1-7) [Patent Document 2] JP 2007-39052 A (claims 1, 2, figures 1-23) [Patent Document 3] Patent No. 5417955 (Claim 1, Figures 1-3) Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention provides a packaging material capable of packaging an item while applying tension by partially folding, and a packaging material using the same. [Means for solving the problem]

[0007] The first aspect of the present invention is A first surface portion adjacent to one side of the boundary line and having a bottom plate on which the packaged item is placed; A second surface portion having a top plate adjacent to the other side of the boundary line and sandwiching the packaged item between the bottom plate and the top plate while being folded at the boundary line, Equipped with The bottom plate and the top plate are rectangular areas with one corner touching each other at the boundary line, The first and second surface portions, which are located outside the four sides of the rectangle of the bottom plate and top plate, are foldable portions that can be folded about the four sides.

[0008] The second aspect of the present invention is the packaging material of the first aspect, The bottom plate is a packaging material in which two of its four corners other than the one corner are in contact with two sides of the first surface portion that are perpendicular to the boundary line, and the top plate is a packaging material in which two of its four corners diagonally opposite the one corner are in contact with two sides of the second surface portion that are perpendicular to the boundary line.

[0009] The third aspect of the present invention is the packaging material of the second aspect, The bottom plate is a packaging material in which one of the four corners is in contact with a side of the first surface portion that is parallel to the boundary line, and the top plate is a packaging material in which one of the four corners is in contact with a side of the second surface portion that is parallel to the boundary line.

[0010] The fourth aspect of the present invention is the packaging material of the third aspect, The first surface portion is a packaging material that is continuous with and in contact with one side parallel to the border line and has a joint portion that is joined to a part of the second surface portion.

[0011] The fifth aspect of the present invention is the packaging material of the first aspect, The packaging material has two preliminary fold lines parallel to the boundary line provided on the first surface and the second surface, respectively, at positions equal inward from one of the four corners of the bottom plate and the one diagonally opposite to the one corner.

[0012] The sixth aspect of the present invention is the packaging material of the first aspect, The folded portion is a packaging material configured as a triangular or trapezoidal portion having bases that correspond to the four sides of the rectangle of the bottom plate and the top plate.

[0013] The seventh aspect of the present invention is the packaging material according to the sixth aspect, The folding portion is a packaging material having intermediate folding lines parallel to the four sides of the rectangular bottom and top panels.

[0014] The eighth aspect of the present invention is the packaging material according to the seventh aspect, The packaging material has an insertion hole in the bottom plate into which a tip end of the folded portion is inserted when folded at the intermediate folding line.

[0015] The ninth aspect of the present invention is the packaging material according to the seventh aspect, The packaging material has an insertion hole in the bottom plate and the top plate into which a tip end of the folded portion is inserted when folded at the intermediate folding line.

[0016] The tenth aspect of the present invention is the packaging material of the first aspect, The packaging material has a cushioning portion on the top plate that has a cushioning function.

[0017] The eleventh aspect of the present invention is The packaging material includes any one of the packaging materials described above in the first to tenth means and a box for containing the packaging material.

[0018] A twelfth aspect of the present invention is the packaging material according to the eleventh aspect, The packaging material is a packaging material that is accommodated in the box in a folded state at the folding portion. Effect of the Invention

[0019] According to the packaging material of the first means, the article to be packaged can be packaged in a state in which tension is applied by folding a portion of the material.

[0020] According to the packaging material of the second means described above, the folding portions can be formed more easily than when the two corners of the bottom plate and top plate are positioned inside the two sides of the first surface portion and the second surface portion without contacting each of the two sides.

[0021] According to the packaging material of the third means described above, the folding portion can be formed more easily than when the remaining corner of each of the bottom plate and top plate is configured to be located inside each of the sides parallel to the boundary line between the first surface portion and the second surface portion without contacting the respective sides.

[0022] According to the packaging material of the fourth means, the packaged item can be packaged more stably than when no joint is provided on the first surface.

[0023] According to the packaging material of the fifth means described above, the height of the storage space for the packaged item formed between the bottom plate and the top plate can be increased compared to a case in which preliminary fold lines are not provided on the first and second surfaces.

[0024] According to the packaging material of the sixth means described above, the folded portion can be formed with less waste of the surface material used to produce the packaging material, compared to when the folded portion is configured as a rectangular portion having each of the four sides of the bottom plate and top plate as one side.

[0025] According to the packaging material of the seventh means, the folding portion can be folded at the middle position to form a support portion, as compared with a case where the folding portion does not have a middle folding line.

[0026] According to the packaging material of the eighth means described above, compared to a case in which an insertion hole is not provided in the bottom plate for inserting the tip end of the folding portion when folded at the intermediate fold line, it is possible to maintain the tensioned state and use the folding portion as a self-supporting bottom plate support portion.

[0027] According to the packaging material of the ninth means described above, compared to a case in which no insertion hole is provided in the bottom plate and top plate for inserting the tip end of the folding portion when folded at the intermediate fold line, it is possible to maintain the tensioned state and to use the folding portion separately as a free-standing bottom plate support portion and a free-standing top plate support portion.

[0028] According to the packaging material of the tenth aspect, the packaged item can be protected on the top plate side, compared to a case where no shock absorbing portion is provided on the top plate.

[0029] According to the packaging material of the eleventh means, the packaged item can be placed in a box while being wrapped in the packaging material with tension applied by folding a portion of the packaging material.

[0030] According to the packaging material of the twelfth means described above, the packaged item can be contained in the box in a floating state, supported by the folded folds of the packaging material, compared to a case in which the packaging material is contained in a box with the folds not folded. [Brief description of the drawings]

[0031] [Figure 1] FIG. 2 is a development view of the packaging material according to the first embodiment. [Diagram 2] 2A is a plan view of the packaging material of FIG. 1 in a folded state, and FIG. 2B is a schematic cross-sectional view of the packaging material of FIG. [Diagram 3] 3A is a schematic perspective view showing a state in which a storage space is formed in the packaging material of FIG. 2, and FIG. 3B is a schematic cross-sectional view taken along line BB of the packaging material of FIG. [Figure 4] 4A is a schematic cross-sectional view of the packaging material of FIG. 3 with a packaged item accommodated in the accommodation space thereof, and FIG. 4B is a schematic cross-sectional view of the packaging material of FIG. 3 with a portion of the packaging material compressed. [Diagram 5] 5A is a plan view showing a state where some of the folding portions of the packaging material in FIG. 4 have been folded, and FIG. 5B is a back view showing a state where all of the folding portions of the packaging material in FIG. [Figure 6] 1A is a schematic cross-sectional view showing the state in which the folding portion of the packaging material has been folded once, and FIG. 1B is a schematic cross-sectional view showing the state in which the folding portion of (A) has been folded at the middle fold line and then inserted into an insertion hole. [Figure 7] FIG. 1A is a schematic perspective view of the packaging material after packaging an item, and FIG. 1B is a schematic view of the packaging material of FIG. [Figure 8] FIG. 2 is a schematic perspective view showing a packaging material including the packaging material and a box shown in FIG. 1. [Figure 9] 1A is a schematic diagram showing, in partial cross section, the state in which the packaging material in which the packaged item is packaged is contained in a box, and FIG. 1B is a schematic diagram showing, in partial cross section, the state in which the box in FIG. [Figure 10] FIG. 11 is a development view of a packaging material according to a second embodiment. [Figure 11] 11A is a schematic perspective view showing a state in which a storage space is formed in the packaging material of FIG. 10, and FIG. 11B is a schematic cross-sectional view of the packaging material of FIG. 10 taken along line BB. [Figure 12]12A is a schematic cross-sectional view of the packaging material of FIG. 11 with a packaged item accommodated in the accommodation space thereof, and FIG. 12B is a schematic cross-sectional view of the packaging material of FIG. 11 with a portion of the packaging material compressed. [Figure 13] FIG. 1A is a schematic perspective view of the packaging material after packaging an item, and FIG. 1B is a schematic view of the packaging material of FIG. [Figure 14] FIG. 11 is a development view of a packaging material according to embodiment 3. [Figure 15] 15A is a schematic perspective view of the packaging material of FIG. 14 after packaging an item to be packaged, and FIG. 15B is a schematic view of the packaging material of FIG. 14 as viewed from the side. [Figure 16] FIG. 11 is a development view of a packaging material according to embodiment 4. [Figure 17] 17A is a back view showing a state where some of the folding portions of the packaging material in FIG. 16 have been folded, and FIG. 17B is a plan view showing a state where the remaining folding portions of the packaging material in FIG. [Figure 18] 18A is a schematic perspective view of the packaging material of FIG. 17 when packaging an item to be packaged, and FIG. 18B is a schematic view of the packaging material of FIG. 17 as viewed from the side. [Figure 19] 19 is a schematic diagram showing, partially in cross section, the packaging material of FIG. 18 housed in a box. FIG. [Figure 20] FIG. 13 is a development view of a packaging material according to embodiment 5. [Figure 21] 20A is a schematic diagram showing the state when the packaging material of FIG. 20 packages a packaged item, and FIG. 20B is a schematic diagram showing, in partial cross section, the state when the packaging material of FIG. 20 is contained in a box. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Hereinafter, an embodiment of the present invention will be described.

[0033] Embodiment 1 FIG. 1 is a development view of a packaging material 1A according to a first embodiment of the present invention. In this specification and the drawings, substantially the same components are denoted by the same reference numerals, and redundant description of the same components will be omitted in this specification.

[0034] (Packaging material composition) As shown in FIG. 1, the packaging material 1A has a first surface portion 2 having a bottom plate 3 and a second surface portion 4 having a top plate 5. The first surface portion 2 and the second surface portion 4 are connected to each other so as to be present on both sides of a boundary line 12. The boundary line 12 is a straight line, and is configured as a portion that serves as a trigger for folding. This packaging material 1A is used to package an item 200A to be packaged by sandwiching it between a bottom plate 3 and a top plate 5, as shown in FIG. 4 and FIG. 7(B).

[0035] The first surface portion 2 is a surface portion adjacent to one side of the boundary line 12 . The bottom plate 3 is a rectangular area of ​​the first surface portion 2, where the packaged item 200A is placed. The rectangle is a square or a rhombus. The bottom plate 3 in the first embodiment is a square area.

[0036] The second surface portion 4 is a surface portion adjacent to the other side with the boundary line 12 in between. The top plate 5 is a rectangular area divided so as to sandwich and wrap the packaged item 200A together with the bottom plate 3 when the second surface portion 4 is folded at the boundary line 12 (see FIG. 4(A)). The top plate 5 in the first embodiment is a square area.

[0037] 1, the bottom plate 3 and the top plate 5 are configured as areas in which each corner 3a, 5a thereof contacts each other at a boundary line 12. The corner may be understood to be one of the four corners of a rectangular area. The bottom plate 3 and the top plate 5 are formed to have the same dimensions. The dimensions of the bottom plate 3 and the top plate 5 are set to fit, for example, the size of the packaged item 200A to be packaged, or, when the packaging material 1A is housed in a box 9 and used as the packaging material 10 as described below, the size of the interior of the box 9.

[0038] Of the four corners 3a, 3b, 3c, and 3d of the bottom plate 3, the two diagonal corners 3c and 3d other than the one corner 3a mentioned above are in contact with two sides 21 and 22 that are perpendicular to the boundary line 12 of the first surface portion 2. The remaining corner 3b of the bottom plate 3 is in contact with a side 23 that is parallel to the boundary line 12 of the first surface portion 2. The remaining corner 3b is in a diagonal relationship with the one corner 3a.

[0039] Of the four corners 5a, 5b, 5c, and 5d of the top plate 5, the two diagonal corners 5c and 5d other than the corner 5a are in contact with two sides 41 and 42 that are perpendicular to the boundary line 12 of the second surface portion 4. The remaining corner 5b of the top plate 5 is in contact with a side 43 that is parallel to the boundary line 12 of the second surface portion 4. The remaining corner 5b is in a diagonal relationship with the corner 5a.

[0040] Further, the first surface portion 2 has portions outside the four sides 31, 32, 33, 34 of the bottom plate 3 that are configured as bendable portions 6A, 6B, 6C, 6D that can be bent at the four sides, respectively. The folding portion 6A is a portion that can be folded at a side 31 of the bottom plate 3. The folding portion 6B is a portion that can be folded at a side 32 of the bottom plate 3. The folding portion 6C is a portion that can be folded at a side 33 of the bottom plate 3. The folding portion 6D is a portion that can be folded at a side 34 of the bottom plate 3.

[0041] Furthermore, the second surface portion 4 has portions outside the four sides 51, 52, 53, and 54 of the top plate 5 that are configured as folding portions 6E, 6F, 6G, and 6H that can be folded at the four sides, respectively. The folding portion 6E is a portion that can be folded at side 51 of the top plate 5. The folding portion 6F is a portion that can be folded at side 52 of the top plate 5. The folding portion 6G is a portion that can be folded at side 53 of the top plate 5. The folding portion 6H is a portion that can be folded at side 54 of the top plate 5.

[0042] Here, the four sides 31, 32, 33, and 34 of the bottom plate 3 are configured as bending lines in order to facilitate bending of the bending portions 6A, 6B, 6C, and 6D. Moreover, the four sides 51, 52, 53, and 54 of the top plate 5 are also configured as bending lines in order to facilitate bending of the bending portions 6E, 6F, 6G, and 6H. The folding lines on the four sides of the bottom plate 3 and the top plate 5 are formed, for example, by processing one side of the surface material from which the packaging material 1A is made by making cuts or perforations of a predetermined depth.

[0043] 1, the bent portions 6A, 6B, 6C, and 6D have a trapezoidal main body 61 whose base (lower base) is the four sides 31, 32, 33, and 34 of the bottom plate 3. As shown in FIG. 1, the bent portions 6A, 6B, 6C, and 6D have an insertion portion 62 to be inserted into an insertion hole (8) described later, on the upper side (upper base) of the trapezoidal main body 61. The bent portion 6A shown as a representative example is configured as a trapezoidal portion having a base on one side 31 of the bottom plate 3. The insertion portion 62 is formed as a protruding piece protruding in a rectangular shape from the center of the upper base of the main body portion 61.

[0044] 1, the bent portions 6E, 6F, 6G, and 6H have a trapezoidal main body 61 with the four sides 51, 52, 53, and 54 of the top plate 5 as its base (lower base). As shown in FIG. 1, the bent portions 6E, 6F, 6G, and 6H have an insertion portion 62 on the upper side (upper base) of the trapezoidal main body 61 to be inserted into an insertion hole (8) described later. The bent portion 6H, which will be described as a representative example, is configured as a trapezoidal portion having a base at one side 51 of the top plate 5. The insertion portion 62 is formed as a protruding piece protruding in a rectangular shape from the center of the upper base of the main body portion 61.

[0045] Further, in each of the bent portions 6A, 6B, 6C, and 6D, a middle bending line 16 parallel to the four sides 31, 32, 33, and 34 of the bottom plate 3 is provided in the main body portion 61 thereof. Further, in each of the main body portions 61 of the folded portions 6E, 6F, 6G, and 6H, a middle folding line 16 parallel to the four sides 51, 52, 53, and 54 of the top plate 5 is provided. The intermediate folding line 16 is formed, for example, by processing one side of the facing material from which the packaging material 1A is produced by making a cut or perforation of a predetermined depth.

[0046] As shown in FIG. 1, the packaging material 1A has a joint portion 7 provided on the first surface portion 2. The joint 7 is a portion that is adjacent to and continuous with one side 23 that is parallel to the boundary line 12 of the first surface 2. In addition, the joint 7 is also a portion that joins with a part of the second surface 4 when the first surface 2 and the second surface 4 are folded along the boundary line 12 during packaging. When packaging, the joint 7 is brought into contact with a portion of the second surface 4 that is inward from one side 43 parallel to the boundary line 12, and is fixed to the second surface 4 by a fixing means such as adhesive tape, double-sided adhesive tape, or adhesive. Alternatively, the joint 7 may be fixed by providing a linear insertion hole into part of the second surface 4 (for example, a portion close to one side 43) into which the joint 7 is inserted, and inserting the joint 7 into the insertion hole when the packaging material 1A is folded along the boundary line 12. Even in this case, if necessary, the above fixing means may be used in addition to fixing by insertion.

[0047] The joint 7 in the first embodiment is formed as a trapezoidal portion with the lower base being one side 23 of the first surface portion 2. Moreover, the joint 7 is formed as a trapezoidal portion of a predetermined height. In addition, two sides 31, 32, which are the folding lines of the bottom plate 3, are extended and provided in the joint portion 7. The existence of the folding lines extending from the bottom plate 3 makes it easier to fold the folding portions 6A, 6H and the folding portions 6B, 6G. Furthermore, in this joint 7, each intermediate folding line 16 of the folding parts 6A, 6B is bent at a right angle at one side 23 of the bottom plate 3 and is provided in an indented state so as to expand up and down (outside). The presence of this indented folding line makes it easier to fold the folding parts 6A, 6H at the intermediate folding line 16 and the folding parts 6B, 6G at the intermediate folding line 16.

[0048] As shown in FIG. 1, the packaging material 1A has a bottom plate 3 provided with insertion holes 8 into which the respective leading ends of the eight folded portions 6A-6H are inserted when folded along a middle folding line 16.

[0049] In the first embodiment, four insertion holes 8a, 8b, 8c, and 8d are provided as the insertion hole 8. The insertion holes 8a, 8b, 8c, and 8d are formed as rectangular holes parallel to the four sides 31, 32, 33, and 34 of the bottom plate 3 at positions shifted inward by a predetermined distance from the four sides. The insertion holes 8a, 8b, 8c, and 8d are inserted as the respective tip portions when the insertion portion 62 in the bent portions 6A-6H is bent at the intermediate bending line 16. The insertion holes 8a, 8b, 8c, and 8d are formed with dimensions necessary for the insertion portion 62 to be inserted and stopped.

[0050] The packaging material 1A having the above-mentioned configuration is manufactured into a single plate-like member by carrying out necessary processes such as cutting, bending and notching using a foldable surface material. The packaging material 1A can be produced with a minimum of waste from the surface material due to the unique configuration of the arrangement of the bottom plate 3 and the top plate 5 and the arrangement of the folded portions 6. As the foldable surface material, in the case where no plastic is to be used, a paper surface material such as corrugated cardboard or thick paper is used. Furthermore, as the foldable surface material, if necessary, a plastic surface material made of a plastic sheet (a sheet made of a foam such as polypropylene or polyethylene) or corrugated plastic (plastic cardboard material) may be used. Furthermore, the face material is preferably made of a single material, but may be made of a composite material or a material to which a desired function has been added depending on conditions such as the application.

[0051] (Examples of packaging materials) When packaging an item 200A, the packaging material 1A is used as follows.

[0052] First, as shown in FIG. 2, the packaging material 1A is folded back, for example, at the boundary line 12 so that the first surface 2 faces the second surface 4.

[0053] As a result, the bottom plate 3 of the first surface portion 2 and the top plate 5 of the second surface portion 4 face each other as shown in FIG. Additionally, the bent portions 6E, 6F, 6G, and 6H of the second surface portion 4 face the bent portions 6D, 6C, 6B, and 6A of the first surface portion 2, respectively.

[0054] At this time, in the packaging material 1A, the joint 7 protrudes below one side 43 of the second surface 4. As shown in Fig. 3, this joint 7 is brought into contact with, for example, an inner surface portion of the one side 43 of the second surface 4 and fixed to that surface portion by a fixing means such as an adhesive tape. As a result, the packaging material 1A is in a state where the first surface 2 and the second surface 4 are connected via the joint 7.

[0055] Next, as shown in FIG. 3, the packaging material 1A is arranged such that the first surface 2 and the second surface 4 are separated from each other as far as possible to form a storage space S1 therebetween.

[0056] The storage space S1 at this time is a space for storing the packaged item 200A. The storage space S1 is surrounded mainly by the bottom plate 3 of the first surface 2 and the top plate 5 of the second surface 4 at the top and bottom, while being open at the front and back. The openings of the storage space S1 in the packaging material 1A are a front opening between side 22 of the first surface 2 and side 42 of the second surface 4, and a rear opening between side 21 of the first surface 2 and side 41 of the second surface 4.

[0057] 3(B), the storage space S1 and the opening in the packaging material 1A have the largest (highest) dimension at the center, h1, and the heights h2, h3 on both sides are smaller (lower) than the height h1 of the center. The front-to-back and left-to-right dimensions of the storage space S1 are approximately the same as the diagonal dimensions of the bottom plate 3 and the top plate 5.

[0058] Next, in the packaging material 1A, as shown in FIG. 4(A), a packaged item 200A is accommodated in the accommodation space S1.

[0059] At this time, the bottom surface 202 and top surface 201 of the packaged item 200A are sandwiched between the bottom plate 3 of the first surface 2 and the top plate 5 of the second surface 4, as shown in FIG. 4(A). Here, the packaged item 200A to be packaged in the packaging material 1A has a size and shape that satisfy two conditions: it can be inserted through the opening of the storage space S1 and its planar area is smaller than each of the areas of the bottom plate 3 and the top plate 5. The packaged item 200A in the first embodiment is a disc-shaped item with a relatively thin thickness (vertical dimension) Ta. Even if the thickness Ta of the packaged item 200A is greater than the height h1 of the central portion, etc., it may be possible for the storage space S1 to accommodate the packaged item 200A by spreading the first surface portion 2 and the second surface portion 4 apart in the vertical direction.

[0060] After the packaged item 200A is accommodated in the accommodation space S1, the portions of the packaging material 1A that are located outside the packaged item 200A approach each other and are crushed as shown in Fig. 4(B). The portions of the packaging material 1A that are located outside the packaged item 200A are mainly the folded portions 6A-6H. By putting the packaging material 1A in this state, the next folding operation of the folding portions 6A-6H can be easily performed.

[0061] Next, the packaging material 1A is folded along folding portions 6A-6H as shown in FIG.

[0062] The folding at this time is performed by first folding the opposing bent portions 6 toward the bottom plate 3 along one side of the bottom plate 3 and the top plate 5 in a state where they are stacked facing each other as shown in Figures 5(A) and 6(A). The opposing bent portions 6 are divided into the following four pairs.

[0063] Specifically, the first set of bent portions 6H and 6A are bent toward the bottom plate 3 along a side 54 of the top plate 5 and a side 31 of the bottom plate 3 as bending lines, as shown in FIG. 6(A). Additionally, the second set of folding portions 6G and 6B fold along side 53 of top plate 5 and side 32 of bottom plate 3. The third set of folding portions 6F and 6C fold along side 52 of top plate 5 and side 33 of bottom plate 3. The fourth set of folding portions 6E and 6D fold along side 51 of top plate 5 and side 34 of bottom plate 3. FIG. 5A representatively shows a state in which bending portions 6E and 6D and bending portions 6G and 6B have been performed.

[0064] As shown in FIG. 6(B), the folding at this time involves folding four pairs of opposing folding portions 6 formed by folding one side of each of the bottom plate 3 and the top plate 5 as folding lines so that they are folded back toward the bottom plate 3 at the intermediate folding line 16. As a result, the four sets of bent portions 6 are bent together in a V-shape.

[0065] Furthermore, as shown in Figure 6 (B), the folding at this time is performed by inserting each of the insertion portions 62 of the four pairs of opposing folded portions 6 folded at the intermediate folding lines 16 into the corresponding insertion holes 8a-8d in the bottom plate 3 and fastening them. As a result, the four sets of bent portions 6 become parts that are kept in a V-shaped configuration. The four sets of bent portions 6 kept in this configuration become independent bottom plate support portions of the bottom plate 3, which will be described later.

[0066] FIG. 6B representatively shows a state in which the folded portion 6H and the folded portion 6A are folded along the folding line 16, and then the insertion portion 62 is inserted into the insertion hole 8c and secured. FIG. 5(B) shows a state in which the four pairs of opposing bent portions 6 have been bent together and their respective insertion portions 62 have been inserted into the insertion holes 8a-8d.

[0067] As a result of the above, the packaging material 1A can package an item 200A to be packaged as shown in FIG.

[0068] In this packaging material 1A, as described above, the four pairs of folded portions 6 facing each other are folded toward the bottom plate 3 at one side of each of the top plate 5 and the bottom plate 3 during packaging. 7, in the packaging material 1A, the top plate 5 of the second surface portion 4 and the bottom plate 3 of the first surface portion 2 are subjected to tensions Fa, Fb, Fc, and Fd that stretch them toward (outside) the four pairs of opposing folded portions 6. At this time, the bottom plate 3 and the top plate 5 are subjected to the tensions Fa, Fb, Fc, and Fd and enter a stretched out state as if they are being stretched and spread out. Therefore, according to this packaging material 1A, the packaged item 200A is packaged in a state in which tension is applied by folding the folding portion 6, which is a part of the packaging material 1A.

[0069] More specifically, the bottom plate 3, which is expanded under tensions Fa, Fb, Fc, and Fd, is in close contact with the bottom surface 202 of the packaged item 200A packaged in the packaging material 1A. The top plate 5, which is expanded under tensions Fa, Fb, Fc, and Fd, is in close contact with the top surface 201 of the packaged item 200A while the packaged item 200A is supported by the bottom plate 3. This state is one in which the tensions Fa, Fb, Fc, and Fd are also applied to the packaged item 200A. As a result, the packaged item 200A is sandwiched and held between the bottom plate 3 and the top plate 5 (in the storage space S1) so as to be pressed against the bottom plate 3 and the top plate 5, and is stably packaged in the packaging material 1A.

[0070] (Example of use as packaging material in combination with packaging boxes) Next, the packaging material 1A can be used as a packaging material 10 in combination with a box 9 that contains the packaging material 1A, as shown in FIG.

[0071] 8 is a box having a rectangular bottom surface 91, four side surfaces 92, 93, 94, and 95, and four cover surfaces 96, 97, 98, and 99. Bottom surface 91 is not limited to being composed of a single piece from the beginning, and may be completed by combining surface portions that are divided into a plurality of pieces.

[0072] The box 9 also has a storage space S9 surrounded by the bottom surface portion 91 and the four side surface portions 92, 93, 94, and 95. The storage space S9 has a size that can store the packaging material 1A with the folding portion 6 folded. It is preferable that the storage space S9 has a size such that the flat surface of the storage space S9 can store the bottom plate 3 and the top plate 5 of the packaging material 1A with a small gap therebetween, but is not limited to this. Furthermore, the box 9 is closed by folding the four cover portions 96, 97, 98, and 99 onto the upper ends of the four side portions 92, 93, 94, and 95. As such a box 9, for example, a cardboard box is used.

[0073] In this packaging material 10, the packaging material 1A packaging the packaged item 200A is accommodated in the accommodation space S9 of the box 9 as shown in FIG. 9(A). Next, in the packaging material 10, after the packaging material 1A is housed in the box 9, the four lid surfaces 96, 97, 98, and 99 of the box 9 are closed as shown in FIG. 9(B). As a result of the above, packaging material 10 is combined with packaging material 1A to complete packaging.

[0074] During this packaging, the packaging material 1A is folded as described above and the four sets of folded portions 6 with the insertion portions 62 inserted into the insertion holes 8 exist as protruding portions below the bottom plate 3 and are in contact with the bottom portion 91 of the box 9. The four sets of bent portions 6 are bent portions 6H and 6A, bent portions 6G and 6B, bent portions 6F and 6C, and bent portions 6E and 6D. In this manner, in the packaging material 1A, the four sets of folded portions 6 in the folded state function as bottom plate support portions for the bottom plate 3.

[0075] Therefore, in the packaging material 10, the packaging material 1A packaging the packaged item 200A is stored within the storage space S9 of the box 9, supported by a bottom plate support portion consisting of four sets of folded portions 6 in a folded state. In addition, in the packaging material 10, the packaged item 200A is contained within the storage space S9 of the box 9 in a floating state at a predetermined distance L from the bottom surface portion 91 by the bottom plate support portion consisting of the four sets of folded portions 6.

[0076] Therefore, according to the packaging material 10, the packaging material 1A in which the packaged item 200A is packaged while tension is applied by folding the folding portion 6, which is a part of the packaging material 1A, is contained in the box 9 in this state. In addition, in this packaging material 10, the packaged item 200A is accommodated in a floating state away from the bottom surface 91 of the box 9 by the packaging material 1A. This ensures that the packaged item 200A is protected by a cushioning effect against, for example, an external force input from the bottom surface 91 of the box 9.

[0077] Embodiment 2 FIG. 10 is a development view of a packaging material 1B according to the second embodiment of the present invention. Packaging material 1B is a packaging material having the same configuration as packaging material 1A according to embodiment 1, except that preliminary fold lines 17 are added to the first and second surfaces.

[0078] (Packaging material composition) The preliminary folding lines 17 in the packaging material 1B are two folding lines provided on the first surface 2 and the second surface 4, respectively, parallel to the boundary line 12. As shown in FIG. 10, the two preliminary folding lines 17 are provided as preliminary folding lines 17a, 17b and preliminary folding lines 17c, 17d at positions equal distances inward from corners 3a, 5a and corners 3b, 5b at each of the four corners of the bottom plate 3 and the top plate 5.

[0079] The packaging material 1B provided with the preliminary folding lines 17 is suitable for packaging a packaged item 200B having a relatively large thickness (vertical dimension) Tb. The thickness Tb of the packaged item 200B is thicker than the thickness Ta of the packaged item 200A illustrated in the first embodiment. The thickness Tb is, for example, more than twice the thickness Ta of the packaged item 200A. The packaged item 200B illustrated in the second embodiment has a cubic external shape with a thickness Tb.

[0080] (Examples of packaging materials) When packaging an item 200B, the packaging material 1B is used as follows.

[0081] First, as in the case of packaging material 1A, packaging material 1B is prepared by folding back first surface portion 2 at boundary line 12 to face second surface portion 4, and then fixing joint portion 7 to the inner surface portion of one side 43 of second surface portion 4 (see Figures 2 and 3). As a result, the packaging material 1B is in a state where the first surface 2 and the second surface 4 are connected via the joint 7.

[0082] Next, as shown in FIG. 11, the packaging material 1B is arranged such that the first surface 2 and the second surface 4 are separated from each other as far as possible to form a storage space S2 therebetween.

[0083] At this time, in the packaging material 1B, as shown in Fig. 11(A), the portions of the first surface 2 that are outside the preliminary folding lines 17a, 17b are folded inward at the preliminary folding lines 17a, 17b, respectively. Also, in the packaging material 1B, the portions of the second surface 4 that are outside the preliminary folding lines 17c, 17d are folded inward at the preliminary folding lines 17c, 17d, respectively.

[0084] As a result, in the packaging material 1B, a storage space S2 appears that is surrounded by parts of the bottom plate 3 and the top plate 5 and parts of the folded portions 6 from above and below, while being open at the front and rear. In addition, the left and right sides of this storage space S2 are composed of the remaining parts folded at the preliminary folding lines 17 of the bottom plate 3 and the top plate 5, and the remaining parts folded at the preliminary folding lines 17 of each folding section 6.

[0085] In this manner, in the packaging material 1B, as shown in FIG. 11(B), a storage space S2 is obtained that is composed of an opening and an internal space, with the height h5 at the center and the heights h6, h7 of the portions on both the left and right sides (ends) being relatively large. The height h5 of the center of the storage space S2 and the heights h6 and h7 of its ends are all greater than the height h1 (see Figure 3(B)) of the center of the storage space S1 obtained with the packaging material 1A of embodiment 1.

[0086] Next, in the packaging material 1B, as shown in FIG. 12(A), a packaged item 200B is accommodated in the accommodation space S2.

[0087] At this time, by folding the packaging material 1B at the preliminary folding lines 17 as described above, the storage space S2 having an opening with a relatively high height can be easily obtained. Therefore, as shown in FIG. 12(A), the packaging material 1B can accommodate packaged items 200B having a relatively large thickness Tb within the accommodation space S2.

[0088] In this case, after the packaged item 200B is accommodated in the accommodation space S2, the outer portions of the packaged item 200B are brought into a state where they approach each other and are crushed, as shown in Fig. 12(B). The portions of the packaged material 1B that are outer than the packaged item 200B mainly become the folded portions 6A-6H. By placing the packaging material 1B in this state, the next folding operation of the folding portions 6A-6H can be easily performed.

[0089] Next, in the same manner as in the case of the packaging material 1A according to the first embodiment, the packaging material 1B is folded at four pairs of folding portions 6 that face each other as shown in FIG.

[0090] In this folding, the four pairs of opposing folding parts 6 are folded toward the bottom plate 3 along one side of the bottom plate 3 and the top plate 5 as folding lines, and then folded back toward the bottom plate 3 along each intermediate folding line 16. In this folding, the insertion portions 62 of the four pairs of opposing folded portions 6 folded along the intermediate folding lines 16 are inserted into the corresponding insertion holes 8a-8d in the bottom plate 3 and secured in place. As a result, the four sets of bent portions 6 are held in a V-shaped bent shape.

[0091] As a result of the above, the packaging material 1B can package an item 200B as shown in FIG.

[0092] In comparison with the case of packaging using the packaging material 1A that does not have the preliminary folding lines 17, this packaging material 1B can easily package the packaged item 200B having a relatively large thickness Tb as described above.

[0093] In this packaging material 1B, similarly to the packaging material 1A according to embodiment 1, four pairs of opposing folding portions 6 are folded toward the bottom plate 3 at one side of each of the top plate 5 and the bottom plate 3 during packaging. As a result, in the packaging material 1B, as shown in Figure 13, the top plate 5 of the second surface portion 4 and the bottom plate 3 of the first surface portion 2 are subjected to tensions Fa, Fb, Fc, and Fd that stretch them toward each other (outside) of the four pairs of opposing folded portions 6.

[0094] Therefore, the packaged item 200B is also packaged in this packaging material 1B with tension applied by folding the folding portion 6, which is a part of the packaging material 1B.

[0095] More specifically, the bottom plate 3, which is expanded under tensions Fa, Fb, Fc, and Fd, is in close contact with the bottom surface 202 of the packaged item 200B packaged in the packaging material 1B. The top plate 5, which is expanded under tensions Fa, Fb, Fc, and Fd, is in close contact with the top surface 201 of the packaged item 200B, which is supported by the bottom plate 3. This state is a state in which the tensions Fa, Fb, Fc, and Fd are also applied to the packaged item 200B. As a result, the packaged item 200B is sandwiched and held between the bottom plate 3 and the top plate 5 (in the storage space S2) so as to be pressed against the bottom plate 3 and the top plate 5, and is stably packaged in the packaging material 1B.

[0096] (Example of use as packaging material in combination with packaging boxes) Similarly to the packaging material 1A according to the first embodiment, the packaging material 1B can also be used as a packaging material 10 (see FIG. 8) in combination with a box 9 that contains the packaging material 1B. Even in the case of the packaging material 10 including the packaging material 1B and the box 9, the packaging material 1B packaging the packaged item 200B is accommodated in the accommodation space S9 of the box 9 (see FIG. 9(A)).

[0097] Therefore, with this packaging material 10, the packaging material 1B, which has been folded at the folding portion 6, which is part of the packaging material 1B, and which has been subjected to tension to package the item 200B, is contained in the box 9 in this state (see Figure 9(B)). Moreover, in this packaging material 10, the packaged item 200B is contained in a floating state away from the bottom surface portion 91 of the box 9 by the packaging material 1B (see FIG. 9(B)).

[0098] Embodiment 3 FIG. 14 is a development view of a packaging material 1C according to the third embodiment of the present invention. When compared with the packaging material 1B (see FIG. 10) according to the second embodiment, the packaging material 1C has the same configuration as the packaging material 1B, except that a buffer section 56 is added.

[0099] (Packaging material composition) The buffer section 56 in the packaging material 1C is a portion having a buffering function. The buffer section 56 is provided on the top plate 5B of the second surface section 4. The buffering function of the buffer section 56 is a function of cushioning an impact when the packaging material 1C receives an impact from the outside.

[0100] The buffer portion 56 in the third embodiment is formed by a plurality of cuts. The cuts in the buffer portion 56 are parallel cuts 56a, oblique cuts 56b, and bent cuts 56c, which are regularly distributed and arranged as shown in FIG.

[0101] The parallel cuts 56a are cuts formed by parallel lines parallel to the sides 51, 53 of the top plate 5B. The oblique cuts 56b are cuts formed by oblique lines that diagonally intersect the sides 51, 53 of the top plate 5B. The broken line cuts 56c are cuts formed by broken lines that connect a first cut parallel to the sides 51, 53 of the top plate 5B and a second cut parallel to the sides 52, 54 of the top plate 5B at a right angle. The number, dimensions and positions of the parallel line cuts 56a, the oblique line cuts 56b and the broken line cuts 56c are selected according to conditions such as the shape of the packaged item 200C to be packaged, for example.

[0102] Incidentally, the buffer portion 56 may be additionally provided on the bottom plate 3 as well as on the top plate 5B. The packaging material 1C having the shock absorbing portion 56 on both the top plate 5B and the bottom plate 3 is advantageous in the following respects: That is, when a relatively large packaged item 200 is packaged in the packaging material 1C in this case, the large packaged item can be packaged in a more protected state than when the shock absorbing portion 56 is provided on only one of the top plate 5B, etc.

[0103] The packaging material 1C provided with the buffer section 56 is suitable for packaging the packaged item 200C whose upper surface has a complex shape. The upper surface of the packaged item 200C is not a single flat surface, but is a surface having one or more parts protruding upward. 15, packaged item 200C exemplified in embodiment 3 is a structure in which packaged item 200A in embodiment 1 is stacked on top of packaged item 200B in embodiment 2. In other words, packaged item 200C is a structure having an external shape in which lower portion 205 having a cubic external shape and upper portion 206 having a disk-shaped external shape on the upper surface of lower portion 205 are combined.

[0104] (Examples of packaging materials) When packaging an item 200C, the packaging material 1C is used as follows.

[0105] First, as in the case of packaging material 1A, packaging material 1C is prepared by folding back first surface portion 2 at boundary line 12 to face second surface portion 4, and then fixing joint portion 7 to the inner surface portion of one side 43 of second surface portion 4 (see Figures 2 and 3). As a result, the packaging material 1C is in a state where the first surface 2 and the second surface 4 are connected via the joint 7.

[0106] Next, in the same manner as in the case of the packaging material 1B according to the second embodiment, the first surface 2 and the second surface 4 are separated from each other as far as possible to form a storage space S2 between them (see FIG. 11). Thereafter, in the packaging material 1C, the packaged item 200C is stored in the storage space S2 (see FIG. 12 and FIG. 15(B)).

[0107] Next, as in the case of packaging material 1B of embodiment 2, packaging material 1C undergoes the steps of folding four pairs of opposing folding portions 6 as shown in FIG. 15 and inserting the insertion portions 62 of each folding portion 6 into the insertion holes 8.

[0108] During this folding, as shown in FIG. 15(B), the top plate 5 of the second surface portion 4 comes into contact with the upper surface of the upper portion 206 of the packaged item 200C and also comes into contact with the upper surface of the lower portion 205 of the packaged item 200C. At this time, the top plate 5 is deformed at the multiple notches 56a, 56b, 56c of the buffer section 56, and deforms to come into contact with the shape of the top surface of the packaged item 200C as much as possible.

[0109] As a result of the above, the packaging material 1C can package an item 200C as shown in FIG.

[0110] In addition, when this packaging material 1C packages an item 200C whose upper surface has a complex shape, the top plate 5 conforms to the shape of the upper surface of the item 200C and comes into contact with the upper surface more as described above, compared to packaging with the packaging material 1A or 1B that does not have the buffer section 56. In addition, the item 200C is packaged with the buffer section 56 of the top plate 5 providing the buffer function.

[0111] Also, in this packaging material 1C, as in the case of packaging material 1A of embodiment 1, four pairs of opposing folding portions 6 are folded toward the bottom plate 3 at one side of each of the top plate 5 and bottom plate 3 during packaging. As a result, in the packaging material 1C, as shown in Figure 15, the top plate 5 of the second surface portion 4 and the bottom plate 3 of the first surface portion 2 are subjected to tension forces Fa, Fb, Fc, and Fd that stretch them toward each other (outside) of the four pairs of opposing folded portions 6.

[0112] Therefore, the packaged item 200C is also packaged in this packaging material 1C with tension applied by folding the folding portion 6, which is a part of the packaging material 1C.

[0113] More specifically, the packaged item 200C packaged in the packaging material 1C is in a state where the bottom plate 3, which is expanded under tensions Fa, Fb, Fc, and Fd, is in close contact with the bottom surface of the lower stage 205 of the packaged item 200C. The packaged item 200C is also in a state where the top plate 5, which is expanded under tensions Fa, Fb, Fc, and Fd, is in close contact with the top surface of the upper stage 206 of the packaged item 200C, while the packaged item 200C is supported by the bottom plate 3. In this state, the packaged item 200C is also in a state where tensions Fa, Fb, Fc, and Fd are applied to the packaged item 200C. As a result, the packaged item 200C is sandwiched and held between the bottom plate 3 and the top plate 5 (in the storage space S2) so as to be pressed against the bottom plate 3 and the top plate 5, and is stably packaged in the packaging material 1C.

[0114] (Example of use as packaging material in combination with packaging boxes) Similarly to the packaging material 1A according to the first embodiment, the packaging material 1C can also be used as a packaging material 10 (see FIG. 8) in combination with a box 9 that contains the packaging material 1C. Even in the case of the packaging material 10 including the packaging material 1C and the box 9, the packaging material 1C packaging the packaged item 200C is accommodated in the accommodation space S9 of the box 9 (see FIG. 9(A)).

[0115] Therefore, with this packaging material 10, the packaging material 1C, which has been packaged with the packaged item 200C under tension by folding the folding portion 6, which is part of the packaging material 1C, is contained in the box 9 in this state (see Figure 9(B)). Moreover, in this packaging material 10, the packaged item 200C is contained in the packaging material 1C in a floating state away from the bottom surface portion 91 of the box 9 (see FIG. 9(B)).

[0116] Embodiment 4 FIG. 16 is a development view of a packaging material 1D according to the fourth embodiment of the present invention. When compared with the packaging material 1A according to the first embodiment (see FIG. 1), the packaging material 1D has the same configuration as the packaging material 1A, except that the arrangement of the insertion holes 8 is changed.

[0117] (Packaging material composition) The insertion holes 8 in the packaging material 1D are composed of two insertion holes 8a, 8c provided in the bottom plate 3 and two insertion holes 8f, 8g provided in the top plate 5. When compared with the insertion hole 8 in embodiment 1, etc., this insertion hole 8 can also be said to be the insertion holes 8b, 8d (see Figure 1, etc.) that were provided in the bottom plate 3 in embodiment 1, etc., relocated to the top plate 5.

[0118] (Examples of packaging materials) When packaging an item 200A, the packaging material 1D is used as follows.

[0119] First, as in the case of packaging material 1A, packaging material 1D is prepared by folding back first surface portion 2 at boundary line 12 to face second surface portion 4, and then fixing joint portion 7 to the inner surface portion of one side 43 of second surface portion 4 (see Figures 2 and 3). As a result, the packaging material 1D is in a state where the first surface 2 and the second surface 4 are connected via the joint 7.

[0120] Next, in the same manner as in the case of the packaging material 1A according to the first embodiment, the packaging material 1D separates the first surface 2 and the second surface 4 as far as possible from each other to form a storage space S1 between them (see FIG. 3). Thereafter, in the packaging material 1D, the packaged item 200A is stored in the storage space S1 (see FIG. 4).

[0121] Next, as shown in Figs. 17 and 18, the packaging material 1D undergoes an operation of folding the four pairs of opposing folding portions 6 and an operation of inserting the insertion portion 62 of each folding portion 6 into the insertion hole 8. In this folding, as shown in FIG. 18, two sets of opposing folding portions 6 (6E, 6D and 6G, 6B) are folded toward the bottom plate 3 along sides 51, 53 of the bottom plate 3 and top plate 5 as folding lines, and then folded back toward the bottom plate 3 at each intermediate folding line 16. In this folding, the remaining two pairs of opposing folding portions 6 (6A, 6H and 6C, 6F) are folded toward the top plate 5, and then folded back toward the top plate 5 at each intermediate folding line 16.

[0122] Next, as shown in Figure 17 (A), the folding is performed by inserting each of the insertion portions 62 of the two opposing pairs of folded portions 6 (6G, 6B and 6E, 6D) folded toward the bottom plate 3 at the intermediate folding line 16 into the insertion holes 8a, 8c in the bottom plate 3, respectively. In addition, when folding at this time, as shown in Figure 17 (B), each of the insertion portions 62 of the remaining two pairs of opposing folded portions 6 (6C, 6F and 6A, 6H) folded toward the top plate 5 at the intermediate folding line 16 is inserted into the corresponding insertion holes 8f, 8g in the top plate 5 and secured therein.

[0123] As a result of the above, the packaging material 1D can package the packaged item 200A as shown in FIG.

[0124] In this packaging material 1D, as described above, the four pairs of folding portions 6 facing each other during packaging are folded toward the bottom plate 3 or the top plate 5 at one side of each of the top plate 5 and the bottom plate 3. 18(A) and other figures, in the packaging material 1D, the top plate 5 of the second surface portion 4 and the bottom plate 3 of the first surface portion 2 are subjected to tensions Fb and Fd that stretch them toward (outside) the two pairs of opposing folded portions 6 that are folded toward the bottom plate 3. At this time, the bottom plate 3 and the top plate 5 are subjected to the tensions Fb and Fd and enter a stretched out state in which they are stretched and opened up. 18(A) and other figures, in the packaging material 1D, the top plate 5 of the second surface portion 4 and the bottom plate 3 of the first surface portion 2 are subjected to tensions Fe and Fg that stretch them toward (outside) the remaining two pairs of opposing folded portions 6 that are folded toward the top plate 5. At this time, the bottom plate 3 and the top plate 5 are subjected to the tensions Fe and Fg and enter a stretched out state in which they are stretched and opened up.

[0125] Therefore, according to this packaging material 1D, the folded portion 6, which is a part of the packaging material 1D, is folded toward the bottom plate 3 side and the top plate 5 side, respectively, so that the packaged item 200A is packaged in a state in which each tension is applied thereto.

[0126] (Example of use as packaging material in combination with packaging boxes) As with the packaging material 1A according to the first embodiment, the packaging material 1D can also be used as a packaging material 10 (see FIG. 8) in combination with a box 9 that contains the packaging material 1D. Even in the case of the packaging material 10 including the packaging material 1D and the box 9, the packaging material 1D packaging the packaged item 200A is accommodated in the accommodation space S9 of the box 9 (see FIG. 9(A)).

[0127] Therefore, according to this packaging material 10, as shown in FIG. 19, the packaging material 1D, which has been folded at the folding portions 6 that are part of the packaging material 1D in different directions and has been subjected to tension, is contained in the box 9 in this state. In addition, in this packaging material 10, the packaging material 1D contains the packaged item 200A in a floating state at a predetermined distance L1 from the bottom surface 91 of the box 9, and also contains the packaged item 200A in a floating state at a predetermined distance L2 from the lid surface portions 96, 98 that form the top surface of the box 9. As a result, the packaged item 200A is protected, for example, by ensuring cushioning against external forces input from the bottom surface 91 side of the box 9, and is also protected, for example, by ensuring cushioning against external forces input from the lid surface portions 96, 98 side, which form the top surface of the box 9.

[0128] Embodiment 5. FIG. 20 is a development view of a packaging material 1E according to the fifth embodiment of the present invention. When compared with packaging material 1A according to embodiment 1 (see FIG. 1), packaging material 1E has the same configuration as packaging material 1A, except that the shape of folding portion 6 is changed and insertion hole 8 is omitted.

[0129] (Packaging material composition) As shown in FIG. 20, the folded portion 6 in the packaging material 1E does not have the insertion portion 62 (see FIG. 1) in the first embodiment, and is configured to be composed only of a trapezoidal main body portion 61B. Furthermore, in the packaging material 1E, the insertion hole 8 (see FIG. 1) in the packaging material 1A according to the first embodiment is not provided and is omitted.

[0130] (Examples of packaging materials) The packaging material 1E is used as a packaging material for packaging an item 200A in the same manner as the packaging material 1A according to the first embodiment, except for the following differences.

[0131] Since the packaging material 1E does not have an insertion hole 8, the folded portions 6A-6H remain folded toward the bottom plate 3 as shown in FIG. 21(A). At this time, the bent portions 6A-6H may be left unfolded at the intermediate folding line 16. Reference numeral 61t in FIG. 21(A) denotes the upper base of the trapezoid of the bent portion 6 when it is not folded at the intermediate folding line 16.

[0132] This packaging material 1E can also be used to package an item 200A as shown in FIG. 21(A).

[0133] In this packaging material 1E as well, the four pairs of folded portions 6 facing each other during packaging are folded toward the bottom plate 3 at one side of each of the top plate 5 and the bottom plate 3, as described above. As a result, in the packaging material 1E, as shown in Figure 21 (A), the top plate 5 of the second surface portion 4 and the bottom plate 3 of the first surface portion 2 are each subjected to tension forces Fi, Fj, Fk, and Fm (Fm is not shown) that stretch them toward (outside) the two opposing pairs of folded portions 6 that are folded toward the bottom plate 3. At this time, the bottom plate 3 and the top plate 5 are stretched and expanded by the tension of each plate.

[0134] Therefore, according to this packaging material 1E, the folded portion 6, which is a part of the packaging material 1E, is folded toward the bottom plate 3 side and the top plate 5 side, respectively, so that the packaged item 200A is packaged in a state in which each tension is applied thereto.

[0135] (Example of use as packaging material in combination with packaging boxes) Similarly to the packaging material 1A according to the first embodiment, the packaging material 1E can also be used as a packaging material 10 (see FIG. 8) in combination with a box 9 that contains the packaging material 1E. Even in the case of the packaging material 10 including the packaging material 1E and the box 9, the packaging material 1E packaging the packaged item 200A is accommodated in the accommodation space S9 of the box 9, as shown in FIG. 21(B).

[0136] 21(B), it is preferable that the folded portion 6 of the packaging material 1E contacts the side portions 92, 93, 94, and 95 in the storage space S9 of the box 9 so that the folded state is maintained. In this case, the box 9 is preferably configured so that the storage space S9 is large enough (dimensions) to store the packaging material 1E with the folded portion 6 in a folded state with a small gap from the four side portions. As a result, the folded portion 6 of the packaging material 1E contained in the box 9 contacts the side portions within the storage space S9, and the folded state is maintained. As a result, the packaging material 1E continues to be in a state in which the top plate 5 and the bottom plate 3 are subjected to the above-mentioned tensions within the box 9.

[0137] In addition, in packaging material 10 combined with packaging material 1E, the four sets of folding portions 6 in packaging material 1E may be divided into those that are folded toward the bottom plate 3 and those that are folded toward the top plate 5, as exemplified for packaging material 1D of embodiment 4.

[0138] Variations. The present invention is not limited to the configurations exemplified as the above-mentioned embodiments 1 to 5, and various modifications, alterations, and combinations are possible within the scope of the gist of each invention described in the claims. Therefore, the present invention also includes, for example, the following modified examples.

[0139] The folding portion 6 in the packaging material 1 may be a folding portion consisting of a trapezoidal main body portion 61B having an overall triangular shape, as illustrated by the dotted line in Figure 20, by removing the upper base and adding a triangular corner portion as shown by the symbol 61C.

[0140] Furthermore, the box 9 of the packaging material 10 may have on its four side surfaces hook portions such as notches, depressions, holes, etc. for hooking and holding the leading ends of the folded portions 6 of the packaging material 1. When the box 9 having the hook is used, the tip of the folded portion 6 of the packaging material 1 can be inserted and hooked to accommodate the package. As a result, the packaging material 1 contained in the box 9 continues to be in a state in which the top plate 5 and the bottom plate 3 are subjected to the above-mentioned tension forces within the box 9. In this case, it is also possible to omit providing the insertion hole 8 in the packaging material 1.

[0141] (Additional Note) (((1))) A first surface portion adjacent to one side of the boundary line and having a bottom plate on which the packaged item is placed; A second surface portion having a top plate adjacent to the other side of the boundary line and sandwiching the packaged item between the bottom plate and the top plate while being folded at the boundary line, Equipped with The bottom plate and the top plate are rectangular areas with one corner touching each other at the boundary line, The packaging material has foldable portions that are located outside the four sides of the rectangle of the bottom plate and top plate of the first surface and the second surface and can be folded about the four sides. (((2))) The packaging material described in (((1))), wherein two of the four corners of the bottom plate other than the one corner are in contact with two sides of the first surface portion that are perpendicular to the boundary line, and two of the four corners of the top plate diagonally opposite the one corner are in contact with two sides of the second surface portion that are perpendicular to the boundary line. (((3))) The packaging material described in (((2))), wherein one of the four corners of the bottom plate is in contact with a side of the first surface portion that is parallel to the boundary line, and one of the four corners of the top plate is in contact with a side of the second surface portion that is parallel to the boundary line. (((4))) The packaging material according to any one of (((1))) to (((3))), wherein the first surface portion is continuous with and in contact with one side parallel to the boundary line and has a joint portion that is joined to a part of the second surface portion. (((5))) A packaging material as described in any of (((1))) to (((4))), wherein the first surface portion and the second surface portion each have two preliminary fold lines parallel to the boundary line at positions the same distance inward from one of the four corners of the bottom plate and the one corner diagonally opposite the one corner. (((6))) The packaging material according to any one of ((1))) to (((5))), wherein the folded portion is configured as a triangular or trapezoidal portion having bases on the four sides of the rectangle of the bottom plate and the top plate. (((7))) The folding portion has intermediate folding lines parallel to the four sides of the rectangle of the bottom plate and the top plate (((6))). (((8))) The packaging material according to ((7))), wherein the bottom plate is provided with an insertion hole into which a tip end of the folded portion is inserted when folded at the intermediate folding line. (((9))) The packaging material according to ((7))), wherein the bottom plate and the top plate are provided with insertion holes into which the tip ends of the folding portions are inserted when folded at the intermediate folding line. (((10))) The packaging material according to any one of ((1))) to (((9))), wherein the top plate is provided with a cushioning section having a cushioning function. (((11))) A packaging material comprising: the packaging material according to any one of (((1))) to (((10))); and a box for containing the packaging material. (((12))) The packaging material according to (((11))) is contained in the box in a folded state at the folding portion.

[0142] According to the packaging material of (((1))), the item to be packaged can be packaged in a state in which tension is applied by partially folding the material. According to the packaging material of (((2))), the folding portions can be formed more easily than when the two corners of the bottom plate and top plate are positioned inside the two sides of the first surface and the second surface without contacting each of the two sides. With the packaging material of (((3))), the folding portion can be formed more easily than when the remaining corner of each of the bottom plate and top plate is configured to be located inside each of the sides parallel to the boundary line between the first surface and the second surface without contacting the respective sides. The packaging material according to (((4))) allows the packaged item to be packaged more stably than when no joint is provided on the first surface portion. According to the packaging material of (((5))), the height of the storage space for the packaged item formed between the bottom plate and the top plate can be increased compared to a case in which no preliminary fold lines are provided on the first surface and the second surface. With the packaging material of (((6))), the folded portion can be formed with less waste of the surface material used to produce the packaging material, compared to when the folded portion is configured as a rectangular portion having each of the four sides of the bottom plate and the top plate as one side. According to the packaging material of (((7))), the folding portion can be folded at a middle position to form a support portion, as compared with a case where the folding portion does not have a middle folding line. With the packaging material of (((8))), compared to a case in which an insertion hole is not provided in the bottom plate for inserting the tip end of the folding portion when folded at the intermediate fold line, it is possible to maintain the tensioned state and use the folding portion as a self-supporting bottom plate support. The packaging material of (((9))) allows the application of tension to be maintained and the folded portions to be used separately as a free-standing bottom plate support portion and a free-standing top plate support portion, compared to a case in which no insertion holes are provided in the bottom plate and top plate for inserting the tip portions of the folded portions when folded at the intermediate fold line. According to the packaging material of (((10))), the packaged item can be protected on the top plate side, compared to a case in which no shock absorbing section is provided on the top plate. According to the packaging material of (((11))), the packaged item can be placed in a box while being wrapped in the packaging material in a state in which tension is applied by folding a portion of the packaging material. With the packaging material according to (((12))), the packaged item can be contained in the box in a floating state, supported by the folded folds of the packaging material, compared to a case in which the packaging material is contained in a box with the folds not folded. [Explanation of symbols]

[0143] 1A,1B,1C,1D,1E…Packaging material 2...First surface part 3...Bottom plate 3a…One corner 3c, 3d...Two diagonal corners 3b…One corner and the opposite corner 4...Second surface part 5. Top plate 5a…One corner 5c, 5d…Two diagonal corners 5b...One corner and the opposite corner 6 …Bending section 7…Joint part 8 … Insertion hole 9...box 10. Packaging materials 12. Borderline 16...Middle fold line 17…Pre-fold line 31, 32, 33, 34…The four sides of the bottom plate 51, 52, 53, 54...The four sides of the tabletop 200A,200B,200C…Packaged items Fa,Fb,Fc,Fd,Fe,Fg,Fi,Fj,Fk...Tension

Claims

1. A first surface portion adjacent to one side of the boundary line and having a bottom plate on which an item to be packaged is placed; A second surface portion having a top plate adjacent to the other side of the boundary line and sandwiching the packaged item between the bottom plate and the top plate while being folded at the boundary line, Equipped with The bottom plate and the top plate are rectangular areas that meet at one corner on the boundary line, The packaging material has foldable portions that are bendable about the four sides of the rectangle of the bottom plate and the top plate and that are located outside the four sides of the rectangle of the bottom plate and the top plate.

2. The packaging material described in claim 1, wherein two of the four corners of the bottom plate other than the one corner are in contact with two sides perpendicular to the boundary line of the first surface portion, and two of the four corners of the top plate diagonally opposite the one corner are in contact with two sides perpendicular to the boundary line of the second surface portion.

3. The packaging material according to claim 2, wherein one of the four corners of the bottom plate is in contact with a side parallel to the boundary line of the first surface portion, and one of the four corners of the top plate is in contact with a side parallel to the boundary line of the second surface portion.

4. The packaging material according to claim 3 , wherein the first surface portion is provided with a joint portion that is continuous with and in contact with one side parallel to the border line and that is joined to a part of the second surface portion.

5. The packaging material according to claim 1, wherein the first surface portion and the second surface portion each have two preliminary fold lines parallel to the boundary line at positions equal inward from one of the four corners of the bottom plate and one corner diagonally opposite the one corner.

6. 2. The packaging material according to claim 1, wherein the folded portion is configured as a triangular or trapezoidal portion having bases that correspond to the four sides of the rectangle of the bottom plate and the top plate.

7. 7. The packaging material according to claim 6, wherein the folded portion has intermediate folding lines parallel to the four sides of the rectangular bottom and top panels.

8. 8. The packaging material according to claim 7, wherein the bottom plate is provided with an insertion hole into which a tip end of the folded portion is inserted when folded at the intermediate folding line.

9. 8. The packaging material according to claim 7, wherein the bottom plate and the top plate are provided with insertion holes into which the leading ends of the folded portions are inserted when folded along the intermediate folding line.

10. 2. The packaging material according to claim 1, wherein the top plate is provided with a cushioning portion having a cushioning function.

11. A packaging material comprising: the packaging material according to any one of claims 1 to 10; and a box for housing the packaging material.

12. The packaging material according to claim 11 , wherein the packaging material is accommodated in the box in a folded state at the folding portion.

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