Buffer material

Abstract

To provide a cushioning material that is formed from sheet materials such as corrugated cardboard sheets and does not become bulky during storage.SOLUTION: A cushioning material 1 comprises a first wrapping part 10 and a second wrapping part 40, the first wrapping part 10 has a first inner side face portion 15 facing the content B and a first side face portion 13 adjacent to the first inner side face portion, and the second wrapping part 40 has a second inner side face portion 45 facing the content B and a second side face portion 43 adjacent to the second inner side face portion 45, wherein the first inner side face portion 13 and the second side face portion 43 are foldably and unfoldably connected through a crease A, and at least one of the first inner side face portion 15 and the second inner side face portion 45 is provided with fixing parts 30A and 30B formed corresponding to at least a part of the shape of the content B in close communication with one another, and a housing part 20 for housing at least a part of the content B.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cushioning material suitable for use in packaging products and the like. [Background technology]

[0002] Conventionally, when packaging products such as bottles, cushioning materials made of materials such as polystyrene foam processed into a shape corresponding to the product are used. When packaging a product using such cushioning materials, the product is packaged by fitting it into the part processed into the shape of the product. In this way, the product is fixed by the cushioning material, and external forces such as impacts are absorbed by the cushioning material, preventing the packaged product from being damaged, for example, during transportation.

[0003] Also known is a packaging box that uses an elastic film to hold a product and protect the product from external impact by preventing the product from coming into contact with the packaging box, etc., as disclosed in Patent Document 1, for example. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2014-5054 A Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, as part of efforts to prevent environmental pollution and realize a sustainable society, it has become common to replace products that were previously manufactured using chemical substances with products made from renewable materials such as paper.

[0006] On the other hand, conventional cushioning materials used for packaging products such as bottles often use materials that use chemicals, such as polystyrene foam. Therefore, it is desirable to provide cushioning materials made from recyclable materials, such as paper. In addition, conventional cushioning materials that use materials such as polystyrene foam cannot be folded, and therefore require more space for storage.

[0007] The present invention has been made to solve the above-mentioned problems, and has an object to provide a cushioning material formed from a sheet material such as a corrugated cardboard sheet. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides the following means. The cushioning material of the present invention comprises a first packaging section and a second packaging section formed by folding a sheet material, and packages contents by placing the contents between the first packaging section and the second packaging section, wherein the first packaging section comprises at least a first inner surface section that faces the contents when packaging the contents, and a first side section that extends in a direction intersecting with the extension direction of the first inner surface section and is adjacent to the first inner surface section, and the second packaging section comprises at least a second inner surface section that faces the contents when packaging the contents, and a second side section that extends in a direction intersecting with the extension direction of the second inner surface section and is adjacent to the second inner surface section, the first inner surface section and the second side section are connected to each other so that they can be folded and unfolded via a crease, and at least one of the first inner surface section and the second inner surface section has a fixing section that is connected to the fixing section and is formed to correspond to the shape of at least a portion of the contents, and a storage section in which at least a portion of the contents is stored is provided.

[0009] According to the cushioning material of the present invention, the first side surface portion and the second side surface portion are folded at the crease into a hinge shape, and then folded back, so that the cushioning material can be opened and closed. This makes it easy to pack and remove contents.

[0010] In addition, since the fixing part formed according to the shape of the contents is provided adjacent to the storage part, the contents can be appropriately fixed and packaged, and the fixing part will not come off the cushioning material when the contents are packaged or removed. Furthermore, since the cushioning material of the present invention is formed by folding the sheet material, it can be stored in a sheet state when not in use.

[0011] In the above invention, it is preferable that the fixing portion is composed of a first fixing portion formed to correspond to the shape of one side of the contents, and a second fixing portion formed to correspond to the shape of the other side of the contents.

[0012] In this way, both sides of the contents are fixed by the first fixing part and the second fixing part, which prevents the contents from moving unnecessarily inside the cushioning material and also properly protects the contents from external impacts.

[0013] In the above invention, it is preferable that the storage section is provided in each of the first packaging section and the second packaging section.

[0014] In this way, a part of the contents is accommodated in one storage section and the other part of the contents is accommodated in the storage section on the other side. When the cushioning is opened, a part of the contents is accommodated in the storage section on one side and the other part of the contents is removed from the storage section on the other side.

[0015] In the above invention, it is preferable that a first locking piece defined by a score line is provided at one end of the first inner surface portion, and a second locking piece defined by a score line is provided at a portion of the second inner surface portion which overlaps with the first locking piece when the contents are contained.

[0016] In this way, the first locking piece and the second locking piece can be folded over and the cushioning material can be fixed in a closed state, thereby preventing the first packaging part and the second packaging part from opening unintentionally.

[0017] In the above invention, the first packaging part and the second packaging part are formed by folding the sheet material into a rectangular tubular shape at their openings. With this configuration, the surfaces constituting the first packaging part and the second packaging part support each other, so that the cushioning material can have strength. Effect of the Invention

[0018] According to the cushioning material of the present invention, it is possible to provide a cushioning material that can adequately secure and protect the contents without using materials such as polystyrene foam, and that does not become bulky when not in use. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a perspective view showing the appearance of the front side of the cushioning material according to the present invention. [Diagram 2] FIG. 2 is a perspective view showing the appearance of the rear side of the cushioning material according to the present invention. [Diagram 3] FIG. 2 is a perspective view illustrating the cushioning material according to the present invention in an unfolded state. [Figure 4] FIG. 2 is a development view of the cushioning material according to the present invention. [Diagram 5] 1A to 1C are diagrams illustrating the assembly of a cushioning material according to the present invention. [Figure 6] 1A to 1C are diagrams illustrating the assembly of a cushioning material according to the present invention. [Figure 7] FIG. 2 is a perspective view illustrating the assembly of the cushioning material according to the present invention. [Figure 8] Fig. 8(a) is a front perspective view for explaining the assembly of the cushioning material, and Fig. 8(b) is a rear perspective view for explaining the assembly of the cushioning material. [Figure 9] FIG. 13 is a diagram illustrating how the contents are packaged using cushioning material. [Figure 10]FIG. 13 is a diagram illustrating how the contents are packaged using cushioning material. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] A cushioning material 1 according to one embodiment of the present invention will be described with reference to Figs. 1 to 10. In the following description, the front-rear, left-right, and top-bottom directions are the directions shown in the drawings unless otherwise specified. The side of the cushioning material 1 that faces the contents will also be referred to as the inside, and the opposite side as the outside.

[0021] In this embodiment, the following description will be given taking as an example a case where the cushioning material 1 of the present invention is used as a cushioning material for packaging a beverage bottle B. The use of the cushioning material 1 is not limited to the above, and for example, the cushioning material 1 may be used as a cushioning material for packaging bottles used for other purposes or other containers. Alternatively, the cushioning material 1 may be used as a cushioning material for packaging industrial products or other products. In the following description, the bottle B packaged by the cushioning material 1 will also be referred to as the "contents". In addition, the bottom side of the bottle B will be referred to as the "bottom side", and the side opposite the bottom side where the spout of the bottle is provided will also be referred to as the "mouth side".

[0022] <1. Description of configuration> First, the configuration of the cushioning material 1 of this embodiment will be described. The cushioning material 1 is a roughly rectangular parallelepiped paper packaging material shown in Figures 1 and 2. The cushioning material 1 is configured to sandwich and package a bottle B placed between a first packaging section 10 on the upper side and a second packaging section 40 on the lower side.

[0023] The first packaging section 10 has a cylindrical shape with a rectangular opening, surrounded by a first left side section 11, a top section 12, a first right side section 13, and a first inner side section 15 (see Figures 1 and 2).

[0024] The first inner side surface portion 15 is the surface that faces the bottle B during packaging. The first inner side surface portion 15 has an opening 20A of a predetermined size, and a first inner side surface portion 15F and a first inner side surface portion 15E arranged on either side of the opening 20A (see FIG. 3).

[0025] The first inner side surface portion 15F is a generally rectangular portion provided forward of the opening 20A. A first recess 30A is provided near the center of the first inner side surface portion 15F in a direction intersecting with the front-rear direction. The first recess 30A is a depression large enough to accommodate at least a part of the mouth side of the bottle B, and is connected to the opening 20A.

[0026] The first inner side surface portion 15E is a substantially rectangular portion provided on the opposite side of the first inner side surface portion 15F across the opening 20A. An inner wall portion 21 extending in a direction substantially perpendicular to the inner surface of the top surface portion 12 is connected to the side of the opening 20A side of the first inner side surface portion 15F. At least a part of the leading end of the inner wall portion 21 abuts against the inner surface of the top surface portion 12. In addition, an inner wall portion 25 extending in a direction substantially perpendicular to the top surface portion 12 is connected to the side of the opening 20A side of the first inner side surface portion 15E. At least a part of the leading end of the inner wall portion 25 abuts against the inner surface of the top surface portion 12. The inner wall portion 25 is a portion that supports a part of the bottom of the bottle B when it is packaged.

[0027] The first packaging section 10 is surrounded by a first left side surface section 11, a top surface section 12, a first right side surface section 13, an inner wall section 21, and an inner wall section 25, and has a space therein with an opening 20A. This space is a portion in which at least a portion of the bottle B is accommodated. Hereinafter, the area inside the first packaging section 10 with the opening 20A will also be referred to as the "first accommodation section 20."

[0028] A plate-shaped holding portion 30B is provided near the inner wall portion 25, extending from the portion where the front side of the inner wall portion 25 and the inner surface of the top surface portion 12 abut toward the opening 20A. This holding portion 30B is formed by folding a substantially rectangular sheet material connected to the inner wall portion 25 at a predetermined crease. On the side of the opening 20A of this holding portion 30B, a recess 26 is provided that is recessed in a shape substantially identical to the outer shape of a part of the bottom side of the bottle B.

[0029] The second packaging section 40 has a cylindrical shape with a rectangular opening, surrounded by a second left side section 41, a bottom section 42, a second right side section 43, and a second inner side section 45 (see Figures 1 and 2).

[0030] The second inner side surface portion 45 is a surface that faces the bottle B during packaging. The second inner side surface portion 45 has an opening 50A that is approximately the same size as the opening 20A, and second inner side surface portions 45F and 45E arranged on either side of the opening 50A (see FIG. 3).

[0031] The second inner side surface portion 45F is a generally rectangular portion provided in front of the opening 50A. The second inner side surface portion 45F has generally the same size as the first inner side surface portion 15F, and is similarly provided with a second recess 60A having the same configuration as the first recess 30A.

[0032] The second inner side surface portion 45E is a generally rectangular portion provided on the opposite side of the opening 50A from the second inner side surface portion 45F. The second inner side surface portion 45E has generally the same size as the first inner side surface portion 15E.

[0033] An inner wall portion 51 extending in a direction substantially perpendicular to the bottom portion 42 is connected to the edge of the second inner side surface portion 45F on the opening 50A side. At least a portion of the leading end of the inner wall portion 51 abuts against the inner surface of the bottom portion 42. An inner wall portion 55 extending in a direction substantially perpendicular to the bottom portion 42 is connected to the edge of the second inner side surface portion 45E on the opening 50A side. At least a portion of the leading end of the inner wall portion 55 abuts against the inner surface of the bottom portion 42. The inner wall portion 55 is a portion that supports part of the bottom of the bottle B when it is packaged.

[0034] The second packaging section 40 is surrounded by a second left side surface section 41, a bottom surface section 42, a second right side surface section 43, an inner wall section 51, and an inner wall section 55, and has a space with an opening 50A inside. This space is a section in which at least a portion of the bottle B is accommodated on the opposite side to the portion accommodated in the first storage section 20. Hereinafter, the area inside the second packaging section 40 with the opening 50A will also be referred to as the "second storage section 50."

[0035] Near the inner wall 55, there is provided a holding portion 60B formed in a mountain-like fold from the inside of the bottom surface portion 42 toward the opening 50A. The holding portion 60B is formed by folding a substantially rectangular sheet material connected to the inner wall 55 at a predetermined crease to form a mountain-like shape. At the top of the mountain-like shape of the holding portion 60B, there is provided a recess 56 formed in a shape substantially identical to the outer shape of a part of the bottom side of the bottle B.

[0036] The first right side surface portion 13 and the second right side surface portion 43 are connected so as to be able to be folded and folded back via a fold line A. The cushioning material 1 can be folded so that the first inner surface portion 15 and the second inner surface portion 45 are separated from each other by folding the first right side surface portion 13 and the second right side surface portion 43 outward around the fold line A.

[0037] Furthermore, the cushioning material 1 can be opened and closed by folding back the folded first right side surface portion 13 and second right side surface portion 43 about the fold line A, so that the first inner side surface portion 15 and the second inner side surface portion 45 face each other and come into contact with or are close to each other. In other words, the cushioning material 1 can be opened and closed by folding back the first right side surface portion 13 and the second right side surface portion 43 about the fold line A in a hinge shape.

[0038] Hereinafter, the state of the cushioning material 1 in which the first inner side surface portion 15 and the second inner side surface portion 45 are separated will also be referred to as an "open state." Also, the state of the cushioning material 1 in which the first inner side surface portion 15 and the second inner side surface portion 45 are facing each other and in contact or close to each other will also be referred to as a "closed state."

[0039] The first right side surface portion 13 of this embodiment is an example of a first side surface portion, and the second right side surface portion 43 is an example of a second side surface portion. Also, the first recess 30A, the second recess 60A, the holding portion 30B, and the holding portion 60B of this embodiment are examples of a fixing portion. Also, the first recess 30A and the second recess 60A are examples of a first fixing portion. Also, the holding portion 30B and the holding portion 60B are examples of a second fixing portion.

[0040] <2.Explanation of the development diagram> Next, the sheet material 2 constituting the cushioning material 1 will be described mainly with reference to FIG. The cushioning material 1 is formed by folding the sheet material 2, which is a rectangular cardboard sheet formed into the shape shown in Fig. 4, along a predetermined crease. The sheet material 2 may be another known sheet material, such as cardboard, formed into a predetermined shape. In this embodiment, the sheet material 2 is formed so that the width direction of the cardboard sheet (the direction in which the core of the cardboard sheet extends) is the short side direction of the sheet material 2 (the front-to-rear direction in Fig. 4). Note that the width direction of the cardboard sheet may be a direction different from the above.

[0041] A substantially rectangular first inner surface portion 14 is provided on one end side in the longitudinal direction of the sheet material 2. The first inner surface portion 14 is a portion that is placed so as to overlap the inside of the first right side surface portion 13 when the first packaging unit 10 is assembled. In addition, a substantially rectangular second inner surface portion 44 is provided on the end side opposite the first inner surface portion 14 of the sheet material 2. The second inner surface portion 44 is a portion that is placed so as to overlap the inside of the second right side surface portion 43 when the second packaging unit 40 is assembled.

[0042] The first inner side surface portion 15F is connected to the front portion of the first inner surface portion 14 via a fold. The first inner side surface portion 15F is a portion having a substantially rectangular shape, and its length in the front-rear direction is configured to be shorter than that of the first inner surface portion 14 in the front-rear direction. The first inner side surface portion 15E is connected to the rear portion of the first inner surface portion 14 via a fold. The first inner side surface portion 15E is a portion having a substantially rectangular shape, and its length in the front-rear direction is configured to be shorter than that of the first inner surface portion 14 and the first inner side surface portion 15F in the front-rear direction. The first inner side surface portion 15F and the first inner side surface portion 15E are connected to the front and rear portions of the first left side surface portion 11 via folds, respectively, on the side opposite to the first inner surface portion 14.

[0043] A second inner side surface portion 45F having approximately the same size as the first inner side surface portion 15F is connected to a front portion of the second inner surface portion 44 via a fold. A second inner side surface portion 45E having approximately the same size as the first inner side surface portion 15E is connected to a rear portion of the second inner surface portion 44 via a fold. The second inner side surface portion 45F and the second inner side surface portion 45E on the side opposite to the second inner surface portion 44 are connected to the front and rear portions of the second left side surface portion 41 via folds, respectively.

[0044] Between the first left side surface portion 11 and the second left side surface portion 41, the top surface portion 12, the first right side surface portion 13, the second right side surface portion 43, and the bottom surface portion 42 are arranged side by side. Between the first left side surface portion 11 and the top surface portion 12, and between the top surface portion 12 and the first right side surface portion 13, respectively, folds are provided and connected. Between the second right side surface portion 43 and the bottom surface portion 42, and between the bottom surface portion 42 and the second left side surface portion 41, respectively, folds are provided and connected. Between the first right side surface portion 13 and the second right side surface portion 43, fold A is provided and connected.

[0045] The first left side surface portion 11, the first right side surface portion 13, the first inner surface portion 14, the second left side surface portion 41, the second right side surface portion 43, and the second inner surface portion 44 have approximately the same length in the longitudinal direction of the sheet material 2. In addition, the top surface portion 12, the first inner surface portion 15F, the first inner surface portion 15E, the bottom surface portion 42, the second inner surface portion 45F, and the second inner surface portion 45E have approximately the same length in the longitudinal direction of the sheet material 2.

[0046] The front side of the bottom surface portion 42 is disposed at a position shifted rearward from the front sides of the second left side surface portion 41 and the second right side surface portion 43. In other words, the bottom surface portion 42 is formed so that its length in the front-rear direction is shorter than those of the second left side surface portion 41 and the second right side surface portion 43.

[0047] A substantially trapezoidal pressing piece 35a is provided on the front side of the first inner surface portion 14. The pressing piece 35a is a portion surrounded by a linear fold of a predetermined length and a substantially U-shaped cut line connecting both ends of the fold. The cut line here refers to a portion in which the sheet material 2 is continuously cut through by a blade or the like.

[0048] A folding piece 36a is provided on the rear side of the first inner surface portion 14. The folding piece 36a is a portion defined by two cut lines extending side by side at a distance from a predetermined point on the rear side of the first inner surface portion 14 to the front side, and a crease connecting the front ends of the cut lines. In addition, a pushing piece 35b and a folding piece 36b are similarly provided in the respective portions of the first right side surface portion 13 where the pushing piece 35a and the folding piece 36a overlap when the first packaging portion 10 is assembled into a cylindrical shape.

[0049] A push-in piece 65a similar to the push-in piece 35a is provided on the front side of the second inner surface portion 44. A folding piece 66a similar to the folding piece 36a is provided on the rear side of the second inner surface portion 44. Furthermore, a push-in piece 65b and a folding piece 66b are similarly provided in the respective portions of the second right side surface portion 43 where the push-in piece 65a and the folding piece 66a overlap when the second packaging portion 40 is assembled into a cylindrical shape.

[0050] A substantially rectangular inner wall portion 21 extending toward the first inner side surface portion 15E is connected to the rear side of the first inner side surface portion 15F via a fold. A substantially rectangular inner top surface portion 22 extending toward the first inner side surface portion 15E is connected to the rear side of the inner wall portion 21 via a fold. The inner top surface portion 22 is a portion that is placed on the inner surface of the top surface portion 12 during assembly. A protrusion 31 is provided near the approximate center of the rear side of the inner wall portion 21, which is defined by a substantially U-shaped cut line and extends toward the inner top surface portion 22.

[0051] A substantially rectangular inner wall portion 25 extending toward the first inner side surface portion 15F is connected to the front side of the first inner side surface portion 15E via a crease. A substantially rectangular retaining piece 24 extending toward the first inner side surface portion 15F is connected to the front side of the inner wall portion 25 via a crease. A substantially rectangular retaining piece 23 extending toward the first inner side surface portion 15F is connected to the front side of the retaining piece 24 via a crease. The retaining pieces 23 and 24 are folded at the crease at the boundary between them to become the retaining portion 30B.

[0052] A through hole 26a is provided across each of the holding pieces 23 and 24. The through hole 26a is surrounded by an arc-shaped cut line 26b curved forward and provided in the holding piece 23, and an arc-shaped cut line 26c curved backward from both ends of the cut line 26b and provided in the holding piece 24. The through hole 26a is formed to become a recess 26 that corresponds to a part of the outer shape of the bottom side of the bottle B when the holding pieces 23 and 24 are folded together at the crease between them.

[0053] At both ends of the front side of the inner wall portion 25, protrusions 33a, 33b are provided, which are defined by a substantially L-shaped cut line and extend toward the holding piece 24. At the center of the front side of the holding piece 23, a protrusion 32 is provided, which is defined by a substantially U-shaped cut line and extends toward the inner top surface portion 22. The holding piece 23 and the inner top surface portion 22 are separated by the substantially U-shaped cut line that defines the protrusion 32 and linear cut lines extending from both ends of the line.

[0054] A recessed piece 27 is provided in the first inner side surface portion 15F approximately near the center in the longitudinal direction of the sheet material 2, the recessed piece 27 being defined by a pair of cut lines 28a, 28b extending side by side in the front-rear direction and spaced apart by a predetermined length d1 in the longitudinal direction of the sheet material 2. The recessed piece 27 is a portion that is pressed inward when the cushioning material 1 is assembled, and forms the first recess 30A.

[0055] The cut lines 28a and 28b are provided with a length d1 therebetween that is approximately the same as or slightly longer than the width d2 of the portion of the bottle B that corresponds to the first recess 30A during packaging. In other words, the cut lines 28a and 28b are provided with an interval of length d1 between them so that the first recess 30A is formed large enough to accommodate a predetermined portion of the mouth side of the bottle B when the cushioning material 1 is assembled.

[0056] The rear sides of the cut lines 28a, 28b extend into the inner wall portion 21 beyond the boundary between the first inner side surface portion 15F and the inner wall portion 21. The cut lines 28a, 28b extend in a direction toward the inner top surface portion 22 while curving in an arc shape in the direction approaching each other in the inner wall portion 21. The extended tip ends of the cut lines 28a, 28b are connected by a fold that extends in the longitudinal direction of the sheet material 2.

[0057] A fold 27c is provided in the front portion of the recessed piece 27, extending in the longitudinal direction of the sheet material 2 and connecting the front ends of the cut lines 28a and 28b. A fold 27d is provided in a portion a predetermined distance rearward from the fold 27c, extending approximately parallel to the fold 27c. Hereinafter, the portion of the recessed piece 27 between the folds 27c and 27d is also referred to as the recess side portion 27b. The portion of the recessed piece 27 rearward of the fold 27d is also referred to as the recess top portion 27a.

[0058] The fold 27c is provided so that the distance L1 between the first inner side surface portion 15E and the side of the opening 20A is approximately the same as the height L2 of the bottle B (see FIG. 3). Moreover, the fold 27d is provided at a position such that the first recess 30A becomes a depression deep enough to accommodate at least a part of the mouth side of the bottle B.

[0059] A thin through hole 37 that is elongated in the front-rear direction is provided between the first left side surface portion 11 and the inner wall portion 21, the inner top surface portion 22, the holding pieces 23, 24, and the inner wall portion 25. A similar through hole 37 is also provided between the first inner surface portion 14 and the inner wall portion 21, the inner top surface portion 22, the holding pieces 23, 24, and the inner wall portion 25.

[0060] A lock piece 34 is provided on the front end of the first inner side surface portion 15F, on the side of the first left side surface portion 11. The lock piece 34 is a generally trapezoidal portion surrounded by a set of cut lines extending from the front side of the first inner side surface portion 15F toward the rear side and a fold line connecting the rear ends of the cut lines.

[0061] A substantially rectangular inner wall portion 51 extending toward the second inner side surface portion 45E is connected to the rear side of the second inner side surface portion 45F via a fold. A substantially rectangular inner bottom surface portion 52 extending toward the second inner side surface portion 45E is connected to the rear side of the inner wall portion 51 via a fold. The inner bottom surface portion 52 is a portion that is placed on the inner surface of the bottom surface portion 42 during assembly. A protrusion 61 is provided near the center of the rear side of the inner wall portion 51, which is defined by a substantially U-shaped cut line and extends toward the inner bottom surface portion 52.

[0062] A substantially rectangular inner wall portion 55 extending toward the second inner side surface portion 45F is connected to the front side of the second inner side surface portion 45E via a crease. A substantially rectangular retaining piece 54 extending toward the second inner side surface portion 45F is connected to the front side of the inner wall portion 55 via a crease. A substantially rectangular retaining piece 53 extending toward the second inner side surface portion 45F is connected to the front side of the retaining piece 54 via a crease. The retaining pieces 53 and 54 are folded in a mountain fold at the crease between them to become the retaining portion 60B.

[0063] On the side of the holding piece 54 facing the holding piece 53, a through hole 56b is provided, which is cut along an arcuate cut line and a straight cut line connecting both ends of the arcuate cut line. The arcuate edge of the through hole 56b has a shape corresponding to the outer periphery of a part of the bottom side of the bottle B. The straight edge of the through hole 56b is provided on a line along which the crease at the boundary between the holding pieces 53 and 54 extends.

[0064] A pressing portion 56a is provided in a portion adjacent to the through hole 56b of the holding piece 53. The pressing portion 56a has a shape that is line-symmetrical to the through hole 56b with respect to the boundary between the holding piece 53 and the holding piece 54 as the axis.

[0065] The pressing portion 56a is a portion surrounded by the arc-shaped folding line 56c and the straight edge of the through hole 56b. In this embodiment, the folding line 56c surrounding the pressing portion 56a is formed by cutting with a sewing machine blade. The folding line 56c may be formed by any other known method that makes it easy to fold the cardboard sheet at a predetermined position.

[0066] The pressing portion 56a has a plurality of pressing pieces 56d defined by a plurality of cut lines extending radially from a plurality of predetermined points on the boundary between the pressing portion 56a and the through hole 56b toward the folding line 56c.

[0067] The pressing portion 56a is configured so that when the holding pieces 53 and 54 are pressed by the outer part of the bottle B while being bent in a mountain fold shape, the pressing piece 56d is bent toward the through hole 56b, and a recess 56 having a shape corresponding to the bottom part of the bottle B is formed.

[0068] At both ends of the front side of the inner wall portion 55, protrusions 63a, 63b are provided, which are defined by a substantially L-shaped cut line and extend toward the holding piece 54. At the center of the front side of the holding piece 53, a protrusion 62 is provided, which is defined by a substantially U-shaped cut line and extends toward the inner bottom surface portion 52. The holding piece 53 and the inner bottom surface portion 52 are separated from each other by the substantially U-shaped cut line that defines the protrusion 62 and linear cut lines that extend from both ends of the cut line.

[0069] A recessed piece 57 is provided in the second inner side surface portion 45F approximately near the center in the longitudinal direction of the sheet material 2, similar to the recessed piece 27, which is defined by a pair of cut lines 58a, 58b extending side by side in the front-rear direction and spaced apart by a predetermined length d1 in the longitudinal direction of the sheet material 2. The recessed piece 57 is a portion that is pressed in when assembling the cushioning material 1, and forms a second recessed portion 60A similar to the first recessed portion 30A.

[0070] The front portion of the recessed piece 57 is provided with a fold 57c that extends in the longitudinal direction of the sheet material 2 and connects the front ends of the cut lines 58a, 58b. A portion of the recessed piece 57 that is a predetermined distance rearward from the fold 57c is also provided with a fold 57d that extends approximately parallel to the fold 57c. Hereinafter, the portion of the recessed piece 57 between the folds 57c and 57d is also referred to as the recess side portion 57b. The portion of the recessed piece 57 rearward of the fold 57d is also referred to as the recess bottom portion 57a.

[0071] The fold 57c is provided so that the distance L1 between the fold 57c and the side of the second inner side surface portion 45E on the side of the opening 50A is approximately the same as the height L2 of the bottle B (see FIG. 3). Moreover, the fold 57d is provided at a position such that the second recess 60A becomes a depression deep enough to accommodate at least a part of the mouth side of the bottle B.

[0072] A thin through hole 67 that is elongated in the front-rear direction is provided between the inner wall portion 51, the inner bottom surface portion 52, the holding piece 53, the holding piece 54, and the inner wall portion 55 and the second left side surface portion 41. Similarly, a through hole 67 is provided between the inner wall portion 51, the inner bottom surface portion 52, the holding piece 53, the holding piece 54, and the inner wall portion 55 and the second inner surface portion 44.

[0073] A lock piece 64 is provided on the front end of the second inner side surface portion 45F on the side of the second left side surface portion 41. The lock piece 64 is a trapezoidal portion having the same shape as the lock piece 34, and is provided at a position that overlaps with the lock piece 34 when the cushioning material 1 is in a closed state. The lock piece 34 of this embodiment is an example of a first lock piece. The lock piece 64 is also an example of a second lock piece.

[0074] A rectangular through hole 16 extending in the longitudinal direction of the sheet material 2 is provided on the front side of the top surface portion 12, approximately at the center in the longitudinal direction of the sheet material 2. The through hole 16 is provided at a position away from the front side of the top surface portion 12 by a length approximately equal to the front-rear dimension of the first inner side surface portion 15F. This through hole 16 is a portion into which the protrusion 31 is inserted when the cushioning material 1 is assembled.

[0075] A rectangular through hole 17 extending in the longitudinal direction of the sheet material 2 is provided on the rear side of the top surface portion 12, approximately at the center in the longitudinal direction of the sheet material 2. The through hole 17 is provided at a position away from the rear edge of the top surface portion 12 by a length approximately equal to the front-to-rear dimension of the first inner side surface portion 15E. This through hole 17 is a portion into which the protrusion 32 is inserted when the cushioning material 1 is assembled.

[0076] At the rear of the through hole 17 in the top surface portion 12 and adjacent to the first left side surface portion 11 and the first right side surface portion 13, approximately rectangular through holes 18a and 18b extending in the longitudinal direction of the sheet material 2 are provided side by side in the longitudinal direction of the sheet material 2. The through holes 18a and 18b are portions into which the protruding portions 33a and 33b are inserted, respectively, when the cushioning material 1 is assembled.

[0077] Similarly, through holes 46, 47, and 48a and 48b are provided in the bottom surface portion 42. The through hole 46 is a portion into which the protruding portion 61 is inserted when the cushioning material 1 is assembled. The through hole 47 is a portion into which the protruding portion 62 is inserted, and the through holes 48a and 48b are portions into which the protruding portions 63a and 63b are inserted, respectively, when the cushioning material 1 is assembled. The through hole 47 is provided forward of the position where the through hole 17 is provided.

[0078] <3. Assembly and packaging instructions> Next, a method for assembling the cushioning material 1 and a method for packaging the bottle B using the cushioning material 1 will be described mainly with reference to Figs.

[0079] First, the inner top surface portion 22 and the inner wall portion 21 are raised and folded at their respective creases. Specifically, the inner wall portion 21 is folded so as to be substantially perpendicular to the first inner side surface portion 15F. Furthermore, the inner top surface portion 22 is folded in the same direction as the inner wall portion 21 so as to be substantially perpendicular to the inner wall portion 21. At this time, the inner top surface portion 22 is made substantially parallel to the first inner side surface portion 15F (see FIG. 5). Furthermore, the recess piece 27 is cut from the inner top surface portion 22 and the inner wall portion 21 at the cut lines 28a, 28b, and folded at the creases 27c, 27d to form the first recess 30A.

[0080] Similarly, the inner bottom surface portion 52 and the inner wall portion 51 are raised and folded at their respective creases. Specifically, the inner wall portion 51 is folded so as to be approximately perpendicular to the second inner side surface portion 45F. Furthermore, the inner bottom surface portion 52 is folded in the same direction as the inner wall portion 51 so as to be approximately perpendicular to the inner wall portion 51. At this time, the inner bottom surface portion 52 is made approximately parallel to the second inner side surface portion 45F (see FIG. 5). Furthermore, similar to the above-mentioned recessed piece 27, the recessed piece 57 is cut off and folded at the creases 57c and 57d to form the second recess 60A.

[0081] Furthermore, the retaining pieces 23 and 24 and the inner wall portion 25 are raised and folded at their respective creases. Specifically, they are folded toward the same side as the inner wall portion 21 so that the inner wall portion 25 and the first inner side surface portion 15E are substantially perpendicular to each other. Next, the inner wall portion 25 and the retaining piece 24 are mountain-folded. In other words, the retaining piece 23 side of the retaining piece 24 is folded down toward the first inner side surface portion 15F. In this way, the protrusions 33a and 33b are in a state of protruding in a direction away from the crease between the inner wall portion 25 and the retaining piece 24 and away from the first inner side surface portion 15E.

[0082] Furthermore, holding piece 23 is folded back so that protrusion 32 faces the same side as protrusions 33a and 33b. Similarly, holding piece 53, holding piece 54, and inner wall portion 55 are raised and folded in the same manner as holding piece 23, holding piece 24, and inner wall portion 25. In this manner, inner wall portion 55 and second inner side surface portion 45E are perpendicular to each other, and protrusion 62 and protrusions 63a and 63b each protrude to the same side.

[0083] When each of them is folded as described above, an opening is created between the first inner side surface portion 15F and the first inner side surface portion 15E. This opening becomes the opening 20A. Similarly, an opening is created between the second inner side surface portion 45F and the second inner side surface portion 45E. This opening becomes the opening 50A.

[0084] Next, the first left side surface portion 11, the top surface portion 12, the first inner surface portion 14, and the first inner surface portion 15 are folded into a cylindrical shape. Specifically, the first left side surface portion 11, the top surface portion 12, the first inner surface portion 14, and the first inner surface portion 15 are raised from the side of the first inner surface portion 14, and are folded sequentially at each crease to form a cylindrical shape. In this manner, the first inner surface portion 14 comes into contact with the boundary between the top surface portion 12 and the first right side surface portion 13 (see Figs. 5 and 6).

[0085] When forming the first left side surface portion 11, the top surface portion 12, the first inner surface portion 14, and the first inner side surface portion 15 into a cylindrical shape, the protrusion 31 is inserted into the through hole 16. In this manner, the inner wall portion 21 is perpendicular to each of the first inner side surface portion 15F and the top surface portion 12, and the inner top surface portion 22 is fixed in a state of contact with the top surface portion 12.

[0086] Furthermore, protrusion 32 is inserted into through hole 17, and protrusions 33a and 33b are inserted into through holes 18a and 18b, respectively. In this manner, inner wall portion 25 is fixed to top surface portion 12 in a state where it is approximately perpendicular to first inner side surface portion 15E and top surface portion 12, respectively. Furthermore, holding pieces 23 and 24 are folded over and fixed in a state where they extend from the portion where inner wall portion 25 and top surface portion 12 abut toward opening 20A.

[0087] Similarly, the second left side surface portion 41, the bottom surface portion 42, the second inner surface portion 44, and the second inner side surface portion 45 are folded along the creases between them to form a cylindrical shape. In this way, the second inner surface portion 44 comes into contact with the boundary between the bottom surface portion 42 and the second right side surface portion 43 (see Figs. 5 and 6).

[0088] When the second left side surface portion 41, the bottom surface portion 42, the second inner surface portion 44, and the second inner side surface portion 45 are formed into a cylindrical shape, the protrusion portion 61 is inserted into the through hole 46. In this manner, the inner wall portion 51 is approximately perpendicular to each of the bottom surface portion 42 and the second inner side surface portion 45F, and the inner bottom surface portion 52 is fixed to the bottom surface portion 42 in a state of contact with the bottom surface portion 42.

[0089] Furthermore, protrusion 62 is inserted into through hole 47, and protrusions 63a and 63b are inserted into through holes 48a and 48b, respectively. In this manner, inner wall portion 55 is fixed to bottom portion 42 in a state where it is substantially perpendicular to second inner side surface portion 45E and bottom portion 42. Furthermore, holding pieces 53 and 54 are fixed to bottom portion 42 in a state where they are folded in a mountain shape at the crease between them.

[0090] Next, the first right side portion 13 is folded along the crease between the top surface portion 12 so that the first inner surface portion 14 and the first right side portion 13 overlap. Similarly, the second right side portion 43 is folded along the crease between the bottom surface portion 42 so that the second inner surface portion 44 and the second right side portion 43 overlap. In this way, a roughly rectangular parallelepiped is formed in which the first packaging portion 10 and the second packaging portion 40 are stacked vertically (see FIG. 7).

[0091] After the first inner surface portion 14 and the first right side surface portion 13, and the second inner surface portion 44 and the second right side surface portion 43 are overlapped, the pushing pieces 35b and 65b are pushed inward (see FIG. 7). When the pushing piece 35b is pushed inward, the corresponding pushing piece 35a is also pushed inward while overlapping with the pushing piece 35b. Furthermore, when the pushing piece 65b is pushed inward, the corresponding pushing piece 65a is also pushed inward while overlapping with the pushing piece 65b (see FIG. 8(a)).

[0092] Furthermore, the folded pieces 36a and 36b are folded inward while overlapping each other. Similarly, the folded pieces 66a and 66b are folded inward while overlapping each other (see FIG. 8(b)). In this way, the first inner surface portion 14 and the first right side surface portion 13 are fixed in an overlapping state, and the first packaging portion 10 is fixed in a cylindrically formed state. Furthermore, the second inner surface portion 44 and the second right side surface portion 43 are fixed in an overlapping state, and the second packaging portion 40 is fixed in a cylindrically formed state.

[0093] When packaging the bottle B, the cushioning material 1 is opened by folding the first right side surface portion 13 and the second right side surface portion 43 outward at the crease A (see FIG. 9). The bottle B is then stored in the second storage section 50. Specifically, the bottom side of the bottle B faces the inner wall portion 55, and its mouth side faces the inner wall portion 51. The bottle B is then positioned so that the bottom portion of the bottle B fits into the recess 56 of the holder 60B, and the mouth portion of the bottle B fits into the second recess 60A.

[0094] In this way, in the holding portion 60B, each pressing piece 56d is pressed by the bottom side of the bottle B and is folded along the folding line 56c toward the bottom surface portion 42. That is, the bottom side of the bottle B is in contact with the arc-shaped edge of the through hole 56b and the folded pressing piece 56d, and is supported from the side of the bottom surface portion 42. Also, a part of the inner wall portion 55 is in contact with or in close proximity to a part of the bottom of the bottle B. Furthermore, in the second recess 60A, the mouth side portion of the bottle B is fitted, and the recess bottom surface portion 57a, the recess side surface portion 57b, and the edge portion of the inner wall portion 51 formed by the cut lines 58a and 58b are in contact with or in close proximity to the corresponding part of the mouth side of the bottle B. That is, a part of one side of the bottle B is accommodated and fixed in the second accommodation portion 50.

[0095] After the bottle B is accommodated in the second accommodation section 50, the first right side section 13 is folded back at the crease A to close the cushioning material 1. When the cushioning material 1 is closed, the bottom part of the bottle B is fitted into the recess 26 of the holding section 30B. A part of the inner wall section 25 is in contact with or close to the bottom part of the bottle B. Furthermore, the mouth side part of the bottle B is fitted into the recessed part of the first recess 30A, and the recess top surface section 27a, the recess side surface section 27b, and the edge part of the inner wall section 21 formed by the cut lines 28a and 28b are in contact with or close to the mouth side part of the bottle B. That is, a part of the other side of the bottle B is accommodated and fixed in the first accommodation section 20.

[0096] Here, when the bottle B is fixed, it is not necessary that all of the first recess 30A, the second storage section 50, the holding section 30B, the holding section 60B, the inner wall section 25, and the inner wall section 55 are in contact with the corresponding parts of the bottle B. In other words, when the bottle B is fixed, at least one of the above may have a gap between it and the corresponding bottle B.

[0097] When the cushioning material 1 is closed, the lock pieces 34 and 64 are folded down to one side while overlapping each other (see FIG. 10). In this way, the cushioning material 1 is maintained in a closed state. After the lock pieces 34 and 64 are folded down, the outside of the cushioning material 1 is wrapped in a sleeve-shaped wrapping material (not shown). Alternatively, the outside of the cushioning material 1 may be wrapped in a flexible sheet-like wrapping material or other known wrapping material capable of covering the outside of the cushioning material 1. Alternatively, such wrapping may not be performed.

[0098] According to the cushioning material 1 configured as described above, the first packaging section 10 and the second packaging section 40 can be opened and closed in a hinged manner with the fold line A as an axis. Therefore, the bottle B can be easily packaged by sandwiching it between the first packaging section 10 and the second packaging section 40. In addition, since the first packaging section 10 and the second packaging section 40 are connected by the first right side section 13 and the second right side section 43, the respective sections that package the contents do not come apart. Therefore, the contents can be easily packaged and the product can be easily removed.

[0099] Also provided are a first recess 30A and a second recess 60A for fixing the mouth side of the bottle B, retaining parts 30B, 60B for fixing the bottom side of the bottle B, and inner wall parts 25, 55. Therefore, the cushioning material 1 can package the bottle B in a state where it is fixed at both the mouth side and the bottom side. In other words, the cushioning material 1 can package the bottle B while firmly fixing it, and the bottle B will not move unnecessarily inside the cushioning material 1 during transportation, etc.

[0100] Furthermore, the first recess 30A is provided adjacent to the first inner side surface portion 15F, and the holding portion 30B and the inner wall portion 25 are provided adjacent to the first inner side surface portion 15E. The second recess 60A is provided adjacent to the second inner side surface portion 45F, and the holding portion 60B and the inner wall portion 55 are provided adjacent to the second inner side surface portion 45E. This makes it easy to pack and remove the bottle B, as these parts will not come off the cushioning material 1 and fall apart.

[0101] Furthermore, the first packaging section 10 and the second packaging section 40 are provided with a first storage section 20 and a second storage section 50, respectively. Therefore, the bottle B can be stored and packaged on both sides of the first packaging section 10 and the second packaging section 40. Also, for example, when the second packaging section 40 is placed on the bottom and the cushioning material 1 is opened, a part of the bottle B is stored on the second packaging section 40 side, and the opposite side of the bottle B is taken out from the first packaging section 10 and exposed. Alternatively, for example, when the first packaging section 10 is placed on the bottom and the cushioning material 1 is opened, a part of the bottle B is stored on the first packaging section 10 side, and the opposite side of the bottle B is taken out from the second packaging section 40 and exposed. Therefore, the packaging work of the bottle B and the removal of the bottle B can be easily performed.

[0102] Furthermore, when an external impact is applied to the cushioning material 1 in a closed state, the force is dispersed to both the first packaging section 10 and the second packaging section 40. This makes it possible to prevent the external force from concentrating on either the first packaging section 10 or the second packaging section 40, which could result in part of the cushioning material 1 being deformed or destroyed.

[0103] Furthermore, the cushioning material 1 is provided with lock pieces 34 and 64 that maintain the closed state. This makes it possible to prevent the cushioning material 1 from opening unintentionally without using any additional members. For example, it is possible to prevent the cushioning material 1 from opening unintentionally and causing the contents to fall out during transportation or when removing packaging material such as a sleeve that covers the outside of the cushioning material 1.

[0104] Furthermore, the cushioning material 1 is composed of a first packaging section 10 and a second packaging section 40, each having an opening formed in a rectangular cylindrical shape. In this way, the surfaces constituting the cylindrical shapes of the first packaging section 10 and the second packaging section 40 support each other, so that the cushioning material 1 can be made stronger.

[0105] The first recess 30A, the second recess 60A, the holding portion 30B, and the holding portion 60B are provided at positions away from the outside of the cushioning material 1, such as the top surface portion 12 and the bottom surface portion 42. That is, the first recess 30A, the second recess 60A, the holding portion 30B, and the holding portion 60B are configured to hold the bottle B at positions away from the parts that form the outside of the cushioning material 1. The inner wall portion 25 and the inner wall portion 55 are provided at positions away from the cylindrical openings of the first packaging portion 10 and the second packaging portion 40 on the inside. Therefore, even if a force such as an impact is applied to the cushioning material 1 from the outside, the force is prevented from being directly applied to the bottle B.

[0106] Furthermore, the first packaging part 10 and the second packaging part 40 can be fixed in a cylindrical state by the pushing pieces 35a, 35b and the folding pieces 36a, 36b, etc., without using a separate member such as an adhesive. This makes it easy to assemble the cushioning material 1. Also, these fixings can be easily released and the material can be easily returned to a sheet shape. That is, after the contents are removed, the fixing can be released and the material can be returned to a sheet shape for storage, etc., so that the material can be stored compactly.

[0107] The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the cushioning material may have an opening only in the second inner side surface portion 45. That is, the second packaging portion 40 may have a storage portion for storing the contents, and the first packaging portion 10 may not have a storage portion. In this way, a cushioning material with a simpler configuration can be obtained.

[0108] The holding portion 30B and the holding portion 60B may be formed in the same manner as the first recess 30A and the second recess 60A. That is, the first inner side surface portion 15E and the second inner side surface portion 45E may be configured to have recessed portions corresponding to the shapes of the corresponding portions of the contents. Alternatively, the first recess 30A and the second recess 60A may be formed in the same manner as the holding portion 30B and the holding portion 60B.

[0109] In the above embodiment, the first packaging section 10 and the second packaging section 40 are both cylindrically shaped with openings. On the other hand, the cylindrical openings of the first packaging section 10 and the second packaging section 40 may be closed by the side, and the respective side surfaces may be connected via a fold. For example, the cylindrical first packaging section 10 may have a side surface that closes the opening on the bottom side of the bottle B, and the cylindrical second packaging section 40 may have a side surface that closes the opening on the bottom side of the bottle B, and the respective side surfaces may be connected via a fold. That is, the cushioning material 1 may be configured such that the side surface on the bottom side of the bottle B is folded in a hinge shape and connected so as to be able to be folded back, so that the cushioning material can be opened and closed in the longitudinal direction of the bottle B. In this way, a wide variety of cushioning materials can be provided.

[0110] In the above embodiment, the first packaging part 10 and the second packaging part 40 have a rectangular cylindrical opening. However, the first packaging part 10 and the second packaging part 40 may have a cylindrical opening with another shape as long as they can be provided with a storage part capable of storing the contents. For example, the opening may be a cylindrical opening with another shape, such as a triangular or trapezoidal opening.

[0111] Furthermore, the present invention is not limited to the above-mentioned embodiments as long as it is consistent with the gist of the disclosure described in the above-mentioned embodiments. Therefore, the present invention may be a configuration in which at least two of the above-mentioned embodiments are combined, or a configuration in which any of the components illustrated or the components described with reference numerals in the above-mentioned embodiments are eliminated. [Explanation of symbols]

[0112] 1... cushioning material 2... sheet material 10... first packaging section 11... first left side section 12...Top section 13...First right side section 14...First inner surface section 15, 15E, 15F... First inner surface portion 16 to 18b... Through hole 20... First storage section 20A, 50A... Opening 21, 25, 51, 55... Inner wall section 22...Inner top part 23,24,53,54...Holding piece 26,56...Concave part 26a,56b...Through hole 26b, 26c, 28a, 28b, 58a, 58b...Cut lines 27, 57... Recess piece 27a... Recess top surface portion 27b, 57b... Recess side surface portion 27c, 27d, 57c, 57d…Folds 30A…First recess 60A: Second recess 30B, 60B: Holding portion 31~33b,61~63b...Protruding part 34,64...Lock piece 35a, 35b, 65a, 65b...Pushing piece 36a, 36b, 66a, 66b... Folding pieces 37, 67... Through holes 40...Second packaging section 41...Second left side section 42...Bottom section 43...Second right side part 44...Second inner surface part 45, 45E, 45F... Second inner surface portion 46~48b... Through hole 50: second storage section 52: inner bottom surface section 56a: pressing section 56c...Bending line 56d...Pressing piece 57a...Bottom of recess A...crease B...bottle

Claims

1. A cushioning material including a first packaging section and a second packaging section formed by folding a sheet material, the cushioning material packaging the contents by disposing the contents between the first packaging section and the second packaging section, The first packaging section includes: A first inner side surface portion that faces the content when the content is packaged; The first inner surface portion has a first side surface portion adjacent to the first inner surface portion, and the first side surface portion extends in a direction intersecting the direction in which the first inner surface portion extends. The second packaging section includes: A second inner side surface portion that faces the content when the content is packaged; The second inner surface portion has at least a second side surface portion extending in a direction intersecting with the direction in which the second inner surface portion extends and adjacent to the second inner surface portion; The first side surface portion and the second side surface portion are connected to each other via a fold line so as to be able to be folded and unfolded, The first inner surface portion and the second inner surface portion each have a fixing portion formed corresponding to a shape of at least a part of the content and are connected to each other, and a storage portion is provided in which at least a part of the content is stored, The fixing portion is composed of a first fixing portion formed corresponding to the shape of one side of the content and a second fixing portion formed corresponding to the shape of the other side of the content, At least a part of an area of ​​the storage section provided on the first inner surface portion in which a part of the one side of the contents is stored is defined by an inner wall portion connected to the first inner surface portion, and at least a part of an area of ​​the storage section provided on the second inner surface portion in which a part of the other side of the contents is stored is defined by an inner wall portion connected to the second inner surface portion, the first fixing portion is formed by bending a first holding piece connected to an edge of an inner wall portion connected to the first inner surface portion, the first holding piece being connected to an edge opposite the first inner surface portion, so as to protrude toward an opening of the accommodating portion provided on the first inner surface portion; The second fixing portion is formed by bending a second holding piece connected to an edge of an inner wall portion connected to the second inner surface portion, the second holding piece being connected to an edge opposite to the second inner surface portion, so as to protrude toward an opening of the storage portion provided on the second inner surface portion. Buffer material.

2. A first lock piece is provided at one end of the first inner surface portion and is defined by a cut line. The cushioning material according to claim 1, wherein a second locking piece defined by a cut line is provided in a portion of the second inner surface portion that overlaps with the first locking piece when the contents are contained.

3. 3. The cushioning material according to claim 1, wherein the first packaging portion and the second packaging portion are formed by folding the sheet material so that the openings of the first packaging portion and the second packaging portion are rectangular tubular.

Images