Buffer material

Abstract

To provide a technique capable of preventing strength of a buffer material from deteriorating, while reducing the material area of the buffer material.SOLUTION: A buffer material assembled by folding one sheet comprises a single-layered square cylindrical body part that constitutes an outer edge of the buffer material, a first diagonally supporting plate and a second diagonally supporting plate that are extended along respective diagonal lines inside the square cylindrical body, and a claw part for holding a shape after assembled. The first diagonally supporting plate is continuous to the square cylindrical body part; the second diagonally supporting plate is continuous to the first diagonally supporting plate; and the first diagonally supporting plate and the second diagonally supporting plate are made to be in X-shape by folding the sheet to assemble the square cylindrical body part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a cushioning material. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there have been proposed square cylindrical cushioning materials that are assembled by successively folding sheets of cardboard or plastic cardboard (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-104476 [Patent Document 2] JP 2000-355369 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the cushioning materials described in Patent Document 1 and Patent Document 2 have a surface where the sheet is doubled. If a surface where the sheet is doubled exists after assembly, there is a problem that the material area of ​​the sheet increases. In addition, in the cushioning material described in Patent Document 2, in an embodiment where there is no surface where the sheet is doubled, it is necessary to seal the depressions that are unintentionally formed at the corners of the rectangular tube with tape or the like, which may reduce the strength of the cushioning material. For this reason, there has been a demand for a technology that can reduce the material area of ​​the cushioning material while suppressing the decrease in strength of the cushioning material. [Means for solving the problem]

[0005] The present disclosure can be realized in the following forms.

[0006] (1) According to one aspect of the present invention, a cushioning material is provided. This cushioning material is assembled by folding a single sheet, and comprises a single angular cylinder portion constituting an outer edge of the cushioning material, a first diagonal support plate and a second diagonal support plate each extending along a diagonal line inside the angular cylinder portion, and a claw portion for maintaining the shape after assembly, the sheet is substantially rectangular in shape having a first side and a second side which are substantially perpendicular to each other before assembly, the sheet has a substantially rectangular first region having a length of the diagonal line among the first sides and in which the first diagonal support plate and the second diagonal support plate are formed, a substantially rectangular second region connected to the first region and forming the angular cylinder portion, a first folding line forming a boundary between the first region and the second region, and a first through hole formed along the first folding line and into which the claw portion is inserted, the first region has a front edge at a position which is an intersection of the diagonals in the first region, A second folding line is provided parallel to the second side, a first slit is connected to the second folding line and extends to the second side, a second slit is connected to the second folding line and extends to the first folding line, and a third slit is connected to the second slit and extends along the first folding line. In the second region, three third folding lines are provided parallel to the second side, and the claw portion protrudes from the opposite side of the second side. The first diagonal support plate is connected to the square tube portion via the first folding line, the second diagonal support plate is connected to the first diagonal support plate via the second folding line, the sheet is folded at the second folding line to form the first diagonal support plate and the second diagonal support plate into an X shape, and the sheet is folded sequentially at the first folding line and the third folding line to assemble the square tube portion. According to this form of cushioning material, the square tube portion constituting the outer edge of the cushioning material is formed in a single layer, and the first diagonal support plate and the second diagonal support plate are provided inside the square tube portion and extend along the diagonal lines, respectively, so that the material area of ​​the cushioning material can be reduced while suppressing a decrease in the strength of the cushioning material.

[0007] (2) In the cushioning material described in (1) above, the first diagonal support plate and the second diagonal support plate may each have a protrusion formed at a free end, and a second through hole may be formed on the third folding line at a position corresponding to the protrusion, and the protrusion may be inserted into the second through hole. This type of cushioning material can prevent the free ends from shifting during assembly, making it easy to assemble.

[0008] (3) In the cushioning material described in (1) above, the free end of the first diagonal support plate may be narrower in width toward the free end side, and the base end of the first diagonal support plate may be wider in width toward the base end side. With this type of cushioning material, the length of the narrow portion of the first diagonal support plate and the second diagonal support plate can be shortened. As a result, the first diagonal support plate and the second diagonal support plate can be prevented from bending during assembly, making it easy to assemble.

[0009] (4) In the cushioning material described in (2) above, the free end of the first diagonal support plate may be narrower in width toward the free end side, and the base end of the first diagonal support plate may be wider in width toward the base end side. With this type of cushioning material, the length of the narrow portion of the first diagonal support plate and the second diagonal support plate can be shortened. As a result, the first diagonal support plate and the second diagonal support plate can be prevented from bending during assembly, making it easy to assemble.

[0010] (5) The cushioning material according to any one of (1) to (4) above may include one of the first diagonal support plates and one of the second diagonal support plates. This configuration of the cushioning material can prevent the structure of the cushioning material from becoming complicated and can reduce the size of the cushioning material.

[0011] (6) In the cushioning material according to any one of (1) to (4) above, two or more of the first diagonal support plates and one or more of the second diagonal support plates may be provided, and the first diagonal support plates and the second diagonal support plates may be arranged alternately. This type of cushioning material can prevent a decrease in strength of the cushioning material.

[0012] (7) In the cushioning material described in (6) above, the first through hole may be a pair of notches bisected by the third slit. In this form of cushioning material, the first through hole is configured as a pair of notches bisected by the third slit, so that the structure can be simplified and a decrease in the fixing function can be suppressed.

[0013] The present disclosure can be realized in various forms, for example, a blank sheet to be assembled into a cushioning material, a manufacturing method for the cushioning material, a packaging material including the cushioning material, etc. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view showing a schematic configuration of a cushioning material according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a plan view showing an example of a schematic configuration of a seat before assembly. [Diagram 3] FIG. 11 is an explanatory diagram showing the assembly of the cushioning material. [Figure 4] FIG. 11 is an explanatory diagram showing the assembly of the cushioning material. [Diagram 5] FIG. 11 is an explanatory diagram showing the assembly of the cushioning material. [Figure 6] FIG. 11 is an explanatory diagram showing the assembly of the cushioning material. [Figure 7] FIG. 11 is a perspective view showing a schematic configuration of a cushioning material according to a second embodiment. [Figure 8] FIG. 11 is a plan view showing a schematic configuration of a seat before assembly in a second embodiment. [Figure 9] FIG. 11 is an explanatory diagram showing a schematic configuration of a cushioning material according to a third embodiment. [Figure 10]FIG. 11 is a plan view showing a schematic configuration of a seat before assembly in a third embodiment. [Figure 11] FIG. 13 is a perspective view showing a schematic configuration of a cushioning material according to a fourth embodiment. [Figure 12] FIG. 13 is a plan view showing a schematic configuration of a seat before assembly in a fourth embodiment. [Figure 13] 1 is a perspective view showing an example of a schematic configuration of a cushioning material according to a first modified example. FIG. [Figure 14] FIG. 11 is an explanatory diagram showing a schematic configuration of a cushioning material according to a second modified example. [Figure 15] FIG. 11 is a plan view showing an example of a schematic configuration of a seat before assembly in Modification 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A. First embodiment: <Configuration> FIG. 1 is a perspective view showing a schematic configuration of a cushioning material 100 according to an embodiment of the present disclosure. The cushioning material 100 is assembled by folding a single sheet 10. The sheet 10 corresponds to a so-called blank sheet. The material of the sheet 10 is not particularly limited, but may be any thin plate material such as corrugated cardboard or plastic corrugated cardboard. The cushioning material 100 is mainly used to fill gaps when packaging objects such as products and parts in boxes such as corrugated cardboard or cartons.

[0016] The cushioning material 100 includes a square tube portion 20, a first diagonal support plate 30, a second diagonal support plate 40, and a claw portion 50. The square tube portion 20 is formed in a substantially rectangular prism frame shape and constitutes the outer edge of the cushioning material 100. The square tube portion 20 is formed in a single layer. In other words, no two or more sheets of material 10 are overlapped on any of the four faces of the square tube portion 20. The first diagonal support plate 30 and the second diagonal support plate 40 are each provided extending along a diagonal line inside the square tube portion 20. The first diagonal support plate 30 and the second diagonal support plate 40 are formed alternately. The cushioning material 100 of this embodiment includes two first diagonal support plates 30 and one second diagonal support plate 40. A detailed description of the first diagonal support plate 30 and the second diagonal support plate 40 will be given later. The claw portion 50 maintains the shape after assembly. More specifically, the claw portion 50 is inserted into a first through-hole 71, which will be described later, and locks the folded sheet 10.

[0017] Fig. 2 is a plan view showing an example of a schematic configuration of sheet 10 before assembly. Before assembly, sheet 10 has a substantially rectangular external shape having first side 11 and second side 12 that are substantially perpendicular to each other. In Fig. 2, first side 11 is a side that extends in the horizontal direction of the paper, and second side 12 is a side that extends in the vertical direction of the paper. In the example shown in Fig. 2, first side 11 is longer than second side 12. The dimensions and thickness of sheet 10 are set appropriately depending on the size and shape of cushioning material 100.

[0018] The sheet 10 has a first region 15 and a second region 16. The first region 15 is formed in a substantially rectangular shape having a length of the diagonal line of the square tube portion 20 among the first side 11. The first region 15 forms a first diagonal support plate 30 and a second diagonal support plate 40. The second region 16 is formed in a substantially rectangular shape continuing to the first region 15. The second region 16 forms the square tube portion 20. A first folding line 61 is formed at the boundary between the first region 15 and the second region 16. The first folding line 61 is formed in parallel to the second side 12. The first diagonal support plate 30 is connected to the square tube portion 20 via the first folding line 61. A first through hole 71 into which the claw portion 50 is inserted is formed on the first folding line 61. Therefore, the first through hole 71 is formed along the first folding line 61. In this disclosure, the "folding line" means a folding line that does not penetrate the thickness of the sheet 10, and is composed of a crease or a lead crease. The crease is a fold line that is formed by crushing a step that is processed at a target position so that a sheet such as a corrugated board can be folded neatly when assembling the sheet into a three-dimensional shape such as a box. The lead crease is a line that is made by alternately inserting a crease and a cut to make it easier to fold. In addition, in this disclosure, the "through hole" means a hole or a cutout that penetrates the thickness of the sheet 10.

[0019] In the first region 15, a second folding line 62, a first slit 81, a second slit 82, and a third slit 83 are formed. In this disclosure, the term "slit" refers to a cutting line that cuts the sheet 10.

[0020] The second folding line 62 is provided parallel to the second side 12 at a position that is an intersection of the diagonals of the rectangular tube portion 20 in the first region 15. In other words, the second folding line 62 is formed at a position that is approximately halfway in the length direction of the first side 11 in the first region 15. In the example shown in FIG. 2, the second folding line 62 is formed in two places. The second diagonal support plate 40 is connected to the first diagonal support plate 30 via the second folding line 62.

[0021] The first slit 81 is connected to one end of the second folding line 62, and the second slit 82 is connected to the other end of the second folding line 62. The first slit 81 is connected to the second folding line 62 and extends to the second side 12. The first slit 81 separates one end 32, which is the free end of the first diagonal support plate 30, from one end 42 of the second diagonal support plate 40. The second slit 82 is connected to the second folding line 62 and extends to the first folding line 61. The second slit 82 separates the other end 33 of the first diagonal support plate 30 from the other end 43 of the second diagonal support plate 40. In this embodiment, both the first slit 81 and the second slit 82 are formed parallel to the first side 11. In the example shown in FIG. 2, two each of the first slits 81 and the second slits 82 are formed. The third slit 83 is connected to the second slit 82 and is formed along the first folding line 61. The third slit 83 separates the other end 43 side of the second diagonal support plate 40 from the second region 16. Both the one end 42 and the other end 43 of the second diagonal support plate 40 are free ends. The number of the third slits 83 is equal to the number of the second diagonal support plates 40 provided in the cushioning material 100. In the example shown in FIG. 2, one third slit 83 is formed.

[0022] In this embodiment, the width of one end 32, which is a free end of the first diagonal support plate 30, is smaller than the width of the other end 33, which is the base end of the first diagonal support plate 30. In addition, the width of one end 42 of the second diagonal support plate 40, which is defined by the adjacent first slits 81, is larger than the width of the other end 43 of the second diagonal support plate 40, which is defined by the adjacent second slits 82. Here, the width of the first diagonal support plate 30 and the second diagonal support plate 40 corresponds to the length along the direction parallel to the second side 12. From the viewpoint of suppressing a decrease in strength, the width of one end 42 of the second diagonal support plate 40 is preferably larger than the width of the other end 33 of the first diagonal support plate 30, but may be smaller. In addition, from the viewpoint of suppressing a decrease in strength, the width of the other end 43 of the second diagonal support plate 40 is preferably larger than the width of one end 32 of the first diagonal support plate 30, but may be smaller.

[0023] In the second region 16, three third folding lines 63 and a claw portion 50 are formed. The three third folding lines 63 are provided parallel to the second side 12. The formation intervals of the three third folding lines 63 are set according to the shape of the cushioning material 100. The claw portion 50 is formed protruding from the opposite side 13 of the second side 12. The claw portion 50 in this embodiment is provided at a position corresponding to the second diagonal support plate 40 in the direction along the second side 12. A fourth folding line 64 for folding the claw portion 50 is formed at the base end of the claw portion 50. The width of the claw portion 50 in this embodiment, that is, the dimension of the claw portion 50 along the direction parallel to the second side 12, is larger than the width of the other end 43 of the second diagonal support plate 40. The width of the first through hole 71 along the first folding line 61 is set according to the width of the claw portion 50. In this embodiment, the first through-hole 71 is a pair of notches bisected by the third slit 83 .

[0024] In this embodiment, the first diagonal support plate 30 and the second diagonal support plate 40 each have a protrusion 90 formed at a free end. In other words, the protrusion 90 is formed at one end 32 of the first diagonal support plate 30 and one end 42 and the other end 43 of the second diagonal support plate 40. The protrusion 90 in this embodiment is formed at the free end of the first diagonal support plate 30 and the second diagonal support plate 40, approximately at the center in the width direction. In addition, in this embodiment, second through holes 72 are formed on the third folding line 63 at positions corresponding to the protrusions 90. The number of the second through holes 72 is equal to the number of the protrusions 90. The length of the second through holes 72 along the third folding line 63 is set according to the dimension of the protrusion 90 along the direction parallel to the second side 12. The protrusions 90 are inserted into the second through holes 72 during assembly.

[0025] <Assembly Instructions> 3 to 6 are explanatory diagrams showing the assembly of the cushioning material 100. In Fig. 3 to Fig. 6, the sheet 10 is assembled into the cushioning material 100 in this order.

[0026] As shown in Fig. 3, the sheet 10 is folded at the second folding line 62, and the first diagonal support plate 30 and the second diagonal support plate 40 are made into an X shape. Then, the sheet 10 is folded at the first folding line 61, and the protrusion 90 formed at one end 42 of the second diagonal support plate 40 is inserted into the second through hole 72 formed on the third folding line 63. Note that the second folding line 62 may be a forward fold or a reverse fold, but it is preferable to fold it in the forward direction from the viewpoint of simplifying the pressing when forming the folding lines 61, 62, and 63 by pressing only one side of the sheet 10 and from the viewpoint of ease of assembly.

[0027] As shown in Figs. 4 to 6, the sheet 10 is folded in sequence at the third folding line 63 to assemble the rectangular tube portion 20. As shown in Figs. 4 and 5, the protrusion 90 formed at one end 32 of the first diagonal support plate 30 and the protrusion 90 formed at the other end 43 of the second diagonal support plate 40 are inserted in sequence into the second through-holes 72 formed on the third folding line 63. As shown in Fig. 6, the sheet 10 is folded in the fourth folding line 64 to insert the claw portions 50 into the first through-holes 71. This completes the cushioning material 100 shown in Fig. 1.

[0028] According to the cushioning material 100 of the present embodiment described above, the square tube portion 20 constituting the outer edge of the cushioning material 100 is formed in a single layer, so that the structure can be simplified and the material area of ​​the cushioning material 100 (the area of ​​the sheet 10) can be reduced. In addition, since the first diagonal support plate 30 and the second diagonal support plate 40 are provided extending along the diagonal lines inside the square tube portion 20, respectively, strength that can withstand external pressure can be imparted. Therefore, the material area of ​​the cushioning material 100 can be reduced while suppressing a decrease in the strength of the cushioning material 100. In particular, since both the first diagonal support plate 30 and the second diagonal support plate 40 are formed extending over the entire length of the diagonal line, deformation (deformation) due to external pressure can be suppressed compared to a configuration having a support plate divided on the diagonal line, unlike the present application, or a configuration in which the support plate is not along the diagonal line.

[0029] In addition, since the first region 15 and the second region 16 are connected to each other via the first folding line 61 and the sheet 10 is folded and assembled, the assembly process is prevented from becoming complicated, and the assembly can be easily performed. In addition, since the sheet 10 is folded and assembled, the number of parts can be reduced compared to the configuration in which multiple parts are combined, which is different from the present application, and as a result, the increase in the cost required for managing the parts can be suppressed. In addition, compared to the configuration in which multiple parts are combined, which is different from the present application, the assembly can be suppressed from being assembled in the wrong direction, and the parts can be suppressed from being misaligned after assembly. In addition, since the sheet 10 having a substantially rectangular external shape is used as the material, the efficiency of use of the material when cutting out the sheet 10 can be suppressed from decreasing.

[0030] In addition, since the protrusions 90 formed on the free ends of the first diagonal support plate 30 and the second diagonal support plate 40 are assembled while being inserted into the second through holes 72, it is possible to prevent the free ends from being displaced. As a result, assembly can be easily performed. In addition, since the shape of the cushioning material 100 after assembly can be maintained by the claw portions 50, it is possible to prevent the assembly process from becoming complicated compared to a configuration in which the cushioning material 100 is fixed by tape, adhesive, or the like, unlike the present application.

[0031] In addition, since the first diagonal support plate 30 and the second diagonal support plate 40 are alternately arranged, it is possible to suppress a decrease in strength of the cushioning material 100. In addition, since the first through hole 71 is formed by a pair of notches bisected by the third slit 83, it is possible to suppress a decrease in the fixing function while simplifying the structure. In addition, compared to an embodiment in which the first through hole 71 is formed at a position not overlapping with the third slit 83, it is possible to ensure the connection length between the first diagonal support plate 30 and the square tube portion 20, suppress a decrease in strength, and suppress a decrease in symmetry.

[0032] B. Second embodiment: Fig. 7 is a perspective view showing a schematic configuration of a cushioning material 100a of the second embodiment. Fig. 8 is a plan view showing a schematic configuration of a sheet 10a before assembly in the second embodiment. The cushioning material 100a of the second embodiment differs from the cushioning material 100 of the first embodiment in that it includes one first diagonal support plate 30a and one second diagonal support plate 40a. Other configurations are almost the same as those of the first embodiment, so the same components are denoted by the same reference numerals and detailed descriptions thereof are omitted.

[0033] As shown in Fig. 8, in the sheet 10a in the second embodiment, one second folding line 62 is formed, and one each of a first slit 81 and a second slit 82 connected to the second folding line 62 is formed. In the example shown in Fig. 8, the width of one end 32 of the first diagonal support plate 30a is formed smaller than the width of the other end 33, and the width of one end 42 of the second diagonal support plate 40a is formed larger than the width of the other end 43. In addition, the width of one end 32 of the first diagonal support plate 30a is formed smaller than the width of one end 42 of the second diagonal support plate 40a, and the width of the other end 33 of the first diagonal support plate 30a is formed larger than the width of the other end 43 of the second diagonal support plate 40a. In addition, the width of one end 32 of the first diagonal support plate 30a and the width of the other end 43 of the second diagonal support plate 40a are formed to be approximately the same, and the width of the other end 33 of the first diagonal support plate 30a and the width of one end 42 of the second diagonal support plate 40a are formed to be approximately the same.

[0034] The claw portion 50a in this embodiment is provided at a position corresponding to the first diagonal support plate 30a in the direction along the second side 12. The width of the claw portion 50a is formed smaller than the width of the other end 33, which is the base end of the first diagonal support plate 30a. The first through hole 71a is formed at approximately the center in the width direction of the other end 33 of the first diagonal support plate 30a. In addition, the protrusion 90a in this embodiment is formed at the end in the width direction at the free end of the first diagonal support plate 30a and the second diagonal support plate 40a. In addition, the second through hole 72a in this embodiment is a notch formed at the end of the third folding line 63.

[0035] The cushioning material 100a of the second embodiment is assembled in the same manner as the cushioning material 100 of the first embodiment. That is, the sheet 10a is folded at the second folding line 62, and the first diagonal support plate 30a and the second diagonal support plate 40a are made into an X-shape. Thereafter, the sheet 10a is folded in sequence at the first folding line 61 and the third folding line 63 while the protrusions 90a are inserted into the second through holes 72a, and the rectangular tube portion 20 is assembled.

[0036] The cushioning material 100a of the second embodiment described above provides the same effects as the cushioning material 100 of the first embodiment. In addition, since the cushioning material 100a includes one each of the first diagonal support plate 30a and the second diagonal support plate 40a, the configuration of the cushioning material 100a is prevented from becoming complicated, and the cushioning material 100a can be made smaller.

[0037] C. Third embodiment: FIG. 9 is an explanatory diagram showing a schematic configuration of a cushioning material 100b of the third embodiment. For convenience, FIG. 9 shows the cushioning material 100b in the middle of assembly. FIG. 10 is a plan view showing a schematic configuration of a sheet 10b before assembly in the third embodiment. The cushioning material 100b of the third embodiment differs from the cushioning material 100a of the second embodiment in the direction in which the first slits 81b and the second slits 82b are formed. Other configurations are almost the same as those of the second embodiment, so the same reference numerals are used for the same configurations and detailed descriptions thereof are omitted.

[0038] As shown in FIG. 10, the first slit 81b and the second slit 82b are formed along a direction intersecting with a direction along the first side 11 before assembly. In this embodiment, the first slit 81b and the second slit 82b are formed approximately parallel to each other, but they do not have to be approximately parallel. The one end 32, which is the free end of the first diagonal support plate 30b, narrows in width toward the free end side, i.e., toward the one end 32. The other end 33, which is the base end of the first diagonal support plate 30b, widens in width toward the base end side, i.e., toward the other end 33. As a result, the one end 42 of the second diagonal support plate 40b widens in width toward the one end 42 side, and the other end 43 of the second diagonal support plate 40b narrows in width toward the other end 43 side. With this configuration, the length of the narrow parts of the first diagonal support plate 30b and the second diagonal support plate 40b can be shortened.

[0039] The cushioning material 100b of the third embodiment described above has the same effect as the cushioning material 100a of the second embodiment. In addition, the width of one end 32 of the first diagonal support plate 30b narrows toward the one end 32 side, and the width of the other end 33 of the first diagonal support plate 30b widens toward the other end 33 side, so that the length of the narrow part can be shortened in the first diagonal support plate 30b and the second diagonal support plate 40b. As a result, the first diagonal support plate 30b and the second diagonal support plate 40b can be prevented from bending during assembly, so that assembly can be easily performed.

[0040] D. Fourth embodiment: 11 is a perspective view showing a schematic configuration of a cushioning material 100c of the fourth embodiment. The cushioning material 100c of the fourth embodiment differs from the cushioning material 100 of the first embodiment in that it includes two connected rectangular tube portions 20c. Other configurations are almost the same as those of the first embodiment, so the same configurations are denoted by the same reference numerals and detailed descriptions thereof are omitted.

[0041] As shown in Fig. 11, the two rectangular tube portions 20c are connected to each other at any one side of the rectangular tube portions 20c. The angle of the connecting portion of the two rectangular tube portions 20c can be freely changed by adjusting the degree of bending. In this embodiment, two first diagonal support plates 30 and one second diagonal support plate 40 are provided inside each rectangular tube portion 20c.

[0042] FIG. 12 is a plan view showing a schematic configuration of a sheet 10c before assembly in the fourth embodiment. Two first regions 15c and two second regions 16c are formed in the sheet 10c. The two first regions 15c and the two second regions 16c are formed side by side along the first side 11. The two first regions 15c are separated from each other by a fourth slit 84c formed in a direction along the first side 11. The two second regions 16c are connected to each other via a fifth folding line 65c formed in a direction along the first side 11, and are separated from each other by a fifth slit 85c formed in a direction along the first side 11. In this embodiment, the fifth folding line 65c is formed to be connected to two adjacent parallel third folding lines 63. In addition, the fifth folding line 65c may be formed to be connected to the first folding line 61 and the adjacent third folding line 63, or may be formed to be connected to the opposite side 13 on which the claw portion 50 is formed and the adjacent third folding line 63.

[0043] The cushioning material 100c of the fourth embodiment described above has the same effects as the cushioning material 100 of the first embodiment. In addition, since the cushioning material 100c includes two square tube portions 20c connected to each other at any one side of the square tube portions 20c, the object to be packed can be protected from two directions. For example, the cushioning material 100c may be used to fill gaps in corners from two directions when packing the object to be packed in a box.

[0044] E. Variations: FIG. 13 is a perspective view showing an example of a schematic configuration of the cushioning material 100d of the first modification. The cushioning material 100d of the first modification has four first diagonal support plates 30 and three second diagonal support plates 40 provided inside the square tube portion 20. In this way, the number of the first diagonal support plates 30 and the number of the second diagonal support plates 40 provided inside the square tube portion 20 may be any number. That is, in general, the cushioning material 100d may include two or more first diagonal support plates 30 and one or more second diagonal support plates 40, and the first diagonal support plates 30 and the second diagonal support plates 40 may be formed alternately. With this configuration, the strength reduction of the cushioning material can be suppressed. Therefore, for example, even in the cushioning material 100d having a relatively large dimension along the second side 12, the strength reduction can be effectively suppressed.

[0045] FIG. 14 is an explanatory diagram showing a schematic configuration of the cushioning material 100e of the second modification. For convenience, FIG. 14 shows the state of the cushioning material 100e in the middle of assembly. FIG. 15 is a plan view showing an example of a schematic configuration of the sheet 10e before assembly in the second modification. The cushioning material 100e of the second modification includes two first diagonal support plates 30e and one second diagonal support plate 40e, similar to the cushioning material 100 of the first embodiment. In addition, the cushioning material 100e has the first slit 81e and the second slit 82e formed along a direction intersecting with the direction along the first side 11, similar to the cushioning material 100b of the third embodiment. With this configuration, the width of one end 32 of the first diagonal support plate 30e narrows toward the one end 32 side, and the width of the other end 33 of the first diagonal support plate 30e widens toward the other end 33 side. Even with this configuration, the same effects as those of the cushioning material 100 of the first embodiment and the cushioning material 100b of the third embodiment are achieved.

[0046] In addition, the configurations of the cushioning materials 100, 100a-e in the above-mentioned embodiment and modified examples are merely examples and can be modified in various ways. For example, at least a part of the protrusions 90, 90a and the second through holes 72, 72a may be omitted. Also, for example, the width of one end 32 of the first diagonal support plate 30, 30a, b, e may be larger than the width of the other end 33 of the first diagonal support plate 30, 30a, b, e, and the width of one end 42 of the second diagonal support plate 40, 40a, b, e may be smaller than the width of the other end 43 of the second diagonal support plate 40, 40a, b, e. Also, for example, the first through holes 71, 71a may be formed at a position that does not overlap with the third slit 83. Also, for example, a recess may be formed in some corners of the square tube portion 20, 20c depending on the shape of the object to be packed.

[0047] The present disclosure is not limited to the above-mentioned embodiment, and can be realized in various configurations without departing from the spirit of the present disclosure. For example, the technical features in each embodiment corresponding to the technical features in each form described in the Summary of the Invention column can be appropriately replaced or combined in order to solve some or all of the above-mentioned problems or to achieve some or all of the above-mentioned effects. Furthermore, if the technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0048] 10, 10a to e...sheet, 11...first side, 12...second side, 13...opposite side, 15, 15c...first region, 16, 16c...second region, 20, 20c...rectangular tube portion, 30, 30a, b, e...first diagonal support plate, 32...one end, 33...other end, 40, 40a, b, e...second diagonal support plate, 42...one end, 43...other end, 50, 50a...claw portion, 61...first folding line, 62...second folding Bending line, 63...third folding line, 64...fourth folding line, 65c...fifth folding line, 71, 71a...first through hole, 72, 72a...second through hole, 81, 81b, 81e...first slit, 82, 82b, 82e...second slit, 83...third slit, 84c...fourth slit, 85c...fifth slit, 90, 90a...protrusion, 100, 100a-e...cushioning material

Claims

1. A cushioning material that can be assembled by folding a single sheet, A single rectangular tubular portion that constitutes an outer edge of the cushioning material; a first diagonal support plate and a second diagonal support plate each extending along a diagonal line inside the rectangular cylindrical portion; A claw portion for maintaining the shape after assembly; Equipped with the sheet has a generally rectangular shape having a first side and a second side that are generally perpendicular to each other before assembly; The sheet includes: a substantially rectangular first region having the length of the diagonal line among the first sides, in which the first diagonal support plate and the second diagonal support plate are formed; a substantially rectangular second region that is connected to the first region and forms the rectangular tube portion; a first fold line that defines a boundary between the first region and the second region; a first through hole formed along the first folding line and into which the claw portion is inserted; is formed, The first region includes: a second folding line provided parallel to the second side at a position of an intersection of the diagonal lines in the first region; a first slit connected to the second folding line and extending to the second side; a second slit connected to the second folding line and extending to the first folding line; a third slit connected to the second slit and extending along the first folding line; is formed, The second region includes: three third folding lines provided parallel to the second side; The claw portion protruding from a side opposite the second side; is formed, The first diagonal support plate is connected to the rectangular tube portion via the first folding line, the second diagonal support plate is connected to the first diagonal support plate via the second folding line, The sheet is folded at the second folding line so that the first diagonal support plate and the second diagonal support plate are formed into an X shape; The sheet is folded sequentially at the first folding line and the third folding line to assemble the rectangular tube portion. Buffer material.

2. 2. The cushioning material according to claim 1, The first diagonal support plate and the second diagonal support plate each have a protrusion formed at a free end, a second through hole is formed on the third bending line at a position corresponding to the protrusion, The protrusion is inserted into the second through hole. Buffer material.

3. 2. The cushioning material according to claim 1, The free end of the first diagonal support plate has a width that narrows toward the free end, The base end of the first diagonal support plate has a width that increases toward the base end. Buffer material.

4. The cushioning material according to claim 2, The free end of the first diagonal support plate has a width that narrows toward the free end, The base end of the first diagonal support plate has a width that increases toward the base end. Buffer material.

5. The cushioning material according to any one of claims 1 to 4, The device includes one of the first diagonal support plates and one of the second diagonal support plates. Buffer material.

6. The cushioning material according to any one of claims 1 to 4, Two or more of the first diagonal support plates and one or more of the second diagonal support plates are provided, The first diagonal support plate and the second diagonal support plate are alternately arranged. Buffer material.

7. The cushioning material according to claim 6, The first through hole is a pair of notches bisected by the third slit. Buffer material.

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