Method for manufacturing a wrapping film roll storage container, and method for transporting a wrapping film roll storage container

Abstract

Technical Problem The present application provides a wound film roll body in which damage is inhibited at the outermost layer film end, and which is easy to manufacture. Solution The wound film roll body of the present application is wound with a wound film, and in at least one of the end faces of the unused wound film roll body at opposite sides in the axial direction, at least a portion of the outermost layer film end (61E) of the wound film constituting the outermost layer (61) protrudes outward more than the central side inner layer film end (63E), the central side inner layer being a layer located at the most central side in the axial direction among layers inward of the outermost layer 61, and the portion (64) protruding outward more than the central side inner layer film end (63E) among the wound film constituting the outermost layer (61) is provided in a state capable of being bent toward the center of the one end face, or is bent.

Description

TECHNICAL FIELD

[0001] The present application relates to a wrapping film roll-up body wound with a wrapping film, a storage container, a manufacturing method of a storage container in which the wrapping film roll-up body is built in, and a transportation method of the storage container. BACKGROUND

[0002] A wrapping film having vinylidene chloride-based resin as a main component has high adhesion, good cutting properties, and the like. The wrapping film is pulled out from a storage container in which the wrapping film roll-up body is stored, and is cut by a cutting blade provided in the storage container. The wrapping film is extremely thin, about 10 μm, and thus, at the time of cutting, the wrapping film sometimes tears in a direction that is not intended by a user. Hereinafter, such a phenomenon is referred to as "cutting failure".

[0003] One of the causes of the cutting failure is a damage formed at an outermost film end of the wrapping film constituting an outermost layer of the wrapping film roll-up body. The cutting failure occurs because the wrapping film tears in a direction that is not intended by a user with the damage as a starting point. The outermost layer of the wrapping film roll-up body is a layer that directly contacts an inner surface of the storage container (also referred to as a radially inward surface of the storage container), and thus, the damage is sometimes formed because the outermost film end of the wrapping film rubs against the inner surface of the storage container when the wrapping film roll-up body is stored in the storage container. In addition, the damage is sometimes formed because the outermost film end of the wrapping film rubs against the inner surface of the storage container due to vibration applied during a period before use of the wrapping film roll-up body, such as vibration during transportation of the storage container in which the wrapping film roll-up body is stored.

[0004] In Patent Literature 1, the wrapping film roll-up body is configured so that the width in the width direction of the wrapping film narrows as it goes toward the outermost circumference. Thus, the damage is suppressed from being formed at the film end due to rubbing of the film end against the inner surface of the storage container by vibration applied during a period before use of the wrapping film roll-up body, such as vibration during transportation of the storage container in which the wrapping film roll-up body is stored, and occurrence of the cutting failure is suppressed.

[0005] PRIOR ART DOCUMENTS

[0006] PATENT LITERATURE

[0007] Patent Literature 1: Japanese Patent Application Publication No. 2014-234271 SUMMARY

[0008] PROBLEMS TO BE SOLVED BY THE INVENTION

[0009] However, the wrapping film roll-up body of Patent Literature 1 is configured so that the width in the width direction of the wrapping film narrows as it goes toward the outermost circumference. Thus, when the wrapping film is wound to the winding core, management of the width in the width direction of the wrapping film is required. Thus, there is a possibility that the manufacturing method is complicated, which leads to a decrease in manufacturing efficiency.

[0010] Further, in the case of the wrapping film roll of Patent Literature 1, when the wrapping film roll is housed in the housing container, the wrapping film end rubs against the inner surface of the housing container, and thus there is a possibility that damage is easily caused to the film end, and that cutting failure cannot be sufficiently suppressed.

[0011] Technical Solution

[0012] A wrapping film roll, in which a wrapping film is wound, is provided with at least one of the outermost layer film ends of the wrapping film constituting the outermost layer of the unused wrapping film roll protruding outwardly from the film end of the central inner layer in the axial direction, the central inner layer being the layer in which the film end is located at the most central side in the axial direction among the layers inward of the outermost layer, and the portion protruding outwardly from the film end of the central inner layer in the wrapping film constituting the outermost layer being configured to be bent in the direction of the inner side of the one end face or to be in a bent state.

[0013] According to the above configuration, the portion of the outermost layer film protruding outwardly from the film end of the central inner layer is bent in the direction of the inner side of the one end face, and thus damage to the outermost layer film end due to rubbing against the inner surface of the housing container or the like can be suppressed. Damage is not formed at the outermost layer film end, but is formed at a position slightly inward of the axial center thereof. Thus, occurrence of cutting failure due to damage to the outermost layer film end can be suppressed. The outermost layer film end can protrude outwardly from the film end of the central inner layer in the process of winding the wrapping film around the core material by a simple method such as a method of relaxing the tension applied to the wrapping film in the winding direction, or a method of shifting in one direction in the axial direction.

[0014] In the above wrapping film roll, the configuration can also be such that at least a portion of the outermost layer film end protrudes outwardly from the film end of all the layers inward of the outermost layer in the axial direction. According to the above configuration, at least a portion of the outermost layer film end protrudes from the film end of all the layers inward. Thus, damage to the outermost layer film end due to rubbing against the inner surface of the housing container or the like can be more effectively suppressed.

[0015] In the above wrapping film roll, the configuration can also be such that at least a portion of the outermost layer film end protrudes outwardly from the film end of the central inner layer in each of the two end faces. According to the above configuration, damage to the outermost layer film end due to rubbing against the inner surface of the housing container or the like can be more effectively suppressed in any of the two end faces of the wrapping film roll.

[0016] In the wrapping film roll described above, it can also be configured such that, at each of the two end faces, at least a portion of the outermost layer film end protrudes outward more than the film end of all layers inward of the outermost layer. According to this configuration, damage to the outermost layer film end can be suppressed in both end faces of the wrapping film roll.

[0017] In the wrapping film roll described above, it can also be configured such that, when the amount of protrusion of the film end that protrudes outward most of the film end that protrudes outward more than the central-side inner layer film end, including the outermost layer film end, is set as X (mm), and the thickness of the film end that protrudes outward more than the central-side inner layer film end is set as the protruding thickness Y (mm), the following relational expressions (1) and (2) are satisfied:

[0018] (1) Y ≤ 1.25X (2) X > 0.

[0019] According to the configuration described above, in the layers other than the outermost layer, the portion that protrudes outward more than the central-side inner layer film end can also be bent inward of the end face. Since the multiple layers are bent inward of the end face, the bent portion has flexibility, and impact can be further mitigated. Thus, damage to the outermost layer film end can be further suppressed. Furthermore, by the elasticity of the bent portion, impact when rubbing against the inner surface of the storage container can be mitigated.

[0020] In the wrapping film roll described above, it can also be configured such that the film end that protrudes outward more than the central-side inner layer film end, including the outermost layer film end, protrudes more than 0 mm from the central-side inner layer film end, and is located at a position that does not exceed the end portion of the core material.

[0021] According to the configuration described above, the portion that protrudes outward more than the central-side inner layer film end can be bent inward of the end face, and the outermost layer film end can be less likely to be damaged. Furthermore, by being located at a position that does not exceed the end portion of the core material, the portion can be sandwiched between the end portion of the core material and the inner surface of the storage container, and damage can be suppressed.

[0022] In the wrapping film roll described above, it can also be configured such that the main component of the wrapping film is a vinylidene chloride-based resin. According to this configuration, with respect to a wrapping film in which a vinylidene chloride-based resin is the main component, damage to the outermost layer film end can be suppressed.

[0023] A storage container for solving the above-described problem includes: a wrapping film roll as described above; and a container main body that stores the wrapping film roll. According to this configuration, damage to the outermost layer film end due to, for example, rubbing against the inner surface of the packaging container by vibration applied to the wrapping film roll during transportation and the like before use of the wrapping film roll can be suppressed.

[0024] A manufacturing method of the storage container in which the wrapping film roll is built-in for solving the above problems is a manufacturing method of the storage container in which the wrapping film roll as described above is built-in, wherein the container main body that accommodates the wrapping film roll has one side of a plurality of sides in the circumferential direction of the wrapping film roll provided with an opening through which the wrapping film roll is able to be taken in / out, and a pair of side plates that close the side surfaces opposite to each other in the axial direction, and a lid body that is rotatably provided to the container main body has an upper lid plate that opens / closes the opening, and a pair of lid side plates that are connected to the short sides of the upper lid plate, and the upper lid plate closes the opening, and one side plate and one lid side plate close one side of the container main body, and the other side plate and the other lid side plate open the other side, and in a state in which the end face of the outermost layer film end that protrudes outward more than the central side inner layer film end is set as an insertion end, the wrapping film roll is inserted into the container main body from the opening of the other side, and then the other side is closed by the other side plate and the other lid side plate.

[0025] According to the above configuration, in the process of accommodating the wrapping film roll in the storage container and manufacturing the storage container in which the wrapping film roll is built-in, the outermost layer film end can be inhibited from being damaged due to friction with the inner surface of the storage container or the like.

[0026] A transportation method of the storage container for solving the above problems is a transportation method of the storage container as described above, wherein the end face of the wrapping film roll in which the outermost layer film end protrudes outward more than the central side inner layer film end is set as the upper side to transport the storage container.

[0027] The storage container is transported in a state of standing in a transportation box. The wrapping film roll in the storage container has a tendency that the outermost layer film end on the upper side is more damaged than the lower side due to vibration at the time of transportation. The reason is that the upper side of the wrapping film roll in the storage container is shaken more than the lower side. According to the above configuration, the end face of the outermost layer film end of the wrapping film roll that protrudes outward more than the central side inner layer film end is set as the upper side to transport the storage container. Therefore, the outermost layer film end on the upper side that is shaken more at the time of transportation can be inhibited from being damaged due to friction with the inner surface of the storage container or the like.

[0028] Advantageous Effects

[0029] According to the present application, a wrapping film roll in which the outermost layer film end is inhibited from being damaged and which is easy to manufacture can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a perspective view that shows an unopened state of one embodiment of the storage container in which the roll is built-in.

[0031] Figure 2 is a perspective view that showsFigure 1 A 3D view of the storage container with its lid open, featuring a built-in winding mechanism.

[0032] Figure 3 This is a top view showing the structure of the intermediate body used to manufacture the main body of the container.

[0033] Figure 4 This is a three-dimensional view showing the main part of the coiled object being stored in a storage container.

[0034] Figure 5 It is a schematic representation in Figure 1 The main front view of the right end face of the coil used in the storage container shown.

[0035] Figure 6 It is a schematic representation Figure 5 A front view of the main part of another example of the right end face of the coil shown.

[0036] Figure 7 It is a schematic representation Figure 5 A front view of the main part of another example of the right end face of the coil shown.

[0037] Figure 8 It means in Figure 5 The main view of the outermost part of the right end face of the coiled body shown, in a state where the protruding part from the inner film end is bent inward toward the end face.

[0038] Figure 9 It is a schematic representation Figure 1 The diagram shows the storage container being housed in the shipping box.

[0039] Figure 10 It is a schematic top view showing the main part of the outermost layer, with damage marks formed on the protrusions from the inner membrane end.

[0040] Figure 11 Is Figure 1 Side view of the coil used in the storage container shown.

[0041] Figure 12 This is a three-dimensional diagram of the experimental setup.

[0042] Figure 13 This is a graph showing the results of a transportation experiment. Detailed Implementation

[0043] Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail regarding the stretch film winding body, the storage container with an embedded stretch film winding body, the manufacturing method of the storage container with an embedded stretch film winding body, and the transportation method of the storage container.

[0044] [Storage container with built-in winding body]

[0045] As shown in Figure 1 and Figure 2 , a storage container with built-in winding body is provided with a storage container 10 and a winding film winding body (hereinafter, simply referred to as winding body) 50R.

[0046] The storage container 10 has a cuboid shape extending in one direction. In the case of the storage container 10, for example, an intermediate body composed of one sheet of thick paper such as coated cardboard is bent and adhered to be manufactured. The winding body 50R is provided with a paper-made cylinder body 50C that becomes a core material. A winding film 50 that is one example of a long object is wound to the cylinder body 50C.

[0047] [Storage container]

[0048] The storage container 10 is provided with a container main body 20 and a lid body 30.

[0049] The container main body 20 has an elongated box shape with an upper surface opening. The container main body 20 is provided with a front plate 21, a rear plate 22, a right side plate 23, a left side plate 24, and a bottom plate 25. The front plate 21, the rear plate 22, the right side plate 23, and the left side plate 24 are provided standing from the bottom plate 25, and constitute one peripheral wall. Among them, the front plate 21, the rear plate 22, the bottom plate 25, and the opening are located in the circumferential direction of the winding body. In addition, the right side plate 23 and the left side plate 24 are located in the sides opposite in the left-right direction. Hereinafter, the right side plate 23 and the left side plate 24 are also referred to as main body side plates.

[0050] The material of the container main body 20 and the lid body 30 is not particularly limited, and for example, can be configured to be a plastic, a metal, a corrugated paper, or a laminated board in which a plurality of thick papers are laminated, or can be composed of one thick paper. From the aspect of good use convenience, a paperboard such as coated cardboard is particularly preferable. The opening 20T (refer to Figure 2 ) of the container main body 20 is divided by the upper edge of the peripheral wall. The winding body 50R can be taken out / put in from the opening 20T.

[0051] The axial direction A of the winding body 50R is almost parallel to the direction in which the storage container 10 extends. If the winding film 50 is a winding film in which a vinylidene chloride-based resin is the main component, the effect of suppressing damage to the outermost layer film end is particularly high, and for example, is a film in which any one selected from the group consisting of polyvinylidene chloride, polyvinyl chloride, polyethylene, and polymethyl pentene is used as a raw material, or a multi-layer film in which these are combined, and is not limited thereto. In the present embodiment, a polyvinylidene chloride resin is used. The vinylidene chloride-based resin only needs to contain a vinylidene chloride unit.

[0052] In Figure 1 and Figure 2Here, the opening 20T side relative to the bottom plate 25 is described as the upper side, and the bottom plate 25 side relative to the opening 20T is described as the lower side. Further, the direction from the front plate 21 toward the rear plate 22 is described as the rear direction, and the direction from the rear plate 22 toward the front plate 21 is described as the front direction. Further, the direction from the right side plate 23 toward the left side plate 24 and the direction from the left side plate 24 toward the right side plate 23 are described as the left-right direction. Further, the direction from the bottom plate 25 toward the opening 20T is described as the upper direction, and the direction from the opening 20T toward the bottom plate 25 is described as the lower direction, or as the height direction.

[0053] [Container main body 20]

[0054] The front plate 21, the rear plate 22, and the bottom plate 25 have a rectangular plate shape extending in the left-right direction.

[0055] The front plate 21 and the rear plate 22 face each other in the front-rear direction. The front edge of the bottom plate 25 is the lower edge of the front plate 21, and the rear edge of the bottom plate 25 is the lower edge of the rear plate 22. Further, the edge of the front plate 21 extending in the height direction is the front plate short edge, and the edge of the rear plate 22 extending in the height direction is the rear plate short edge.

[0056] The right side plate 23 and the left side plate 24 have a rectangular plate shape and face each other in the left-right direction. The lower edge of the right side plate 23 is connected to the lower edge of the front plate 21, the lower edge of the rear plate 22, and the right edge of the bottom plate 25. Further, the lower edge of the left side plate 24 is also connected to the lower edge of the front plate 21, the lower edge of the rear plate 22, and the left edge of the bottom plate 25.

[0057] The front plate 21 has an auxiliary front plate 21A (see Figure 3 ) and a main front plate 21B (see Figure 3 ).

[0058] The auxiliary front plate 21A constitutes the inner surface of the container main body 20. The main front plate 21B constitutes the outer surface of the front plate 21. The auxiliary front plate 21A is connected to the main front plate 21B by the upper edge 21T of the main front plate 21B. The outer surface of the main front plate 21B has a temporary fixing portion 21S for temporarily fixing the wrapping film 50 (see Figure 2 ).

[0059] The main front plate 21B has a pair of front plate flaps 21F in the left-right direction.

[0060] The front plate flaps 21F are located near the upper edge 21T of the main front plate 21B at a position closer to the center in the height direction than the temporary fixing portion 21S in the left-right direction.

[0061] The front plate flaps 21F are formed by a portion of the upper edge 21T of the main front plate 21B (see Figure 3) and is surrounded by a curved cut line 21FC having two ends in the portion. The cut line 21FC has a wavy shape protruding downward from the upper edge 21T of the main front plate 21B. The front plate flap 21F is formed by cutting the main front plate 21B along the cut line 21FC to rotate forward with a portion of the upper edge 21T of the main front plate 21B as a rotation axis. The front plate flap 21F is raised by rotating forward from the container main body 20, and thus the cut end of the wrapping film 50 pulled out and cut from the opening 20T of the container main body 20 is raised from the main front plate 21B lower than the front plate flap 21F.

[0062] The temporary fixing portion 21S has a plurality of temporary fixing elements having a quadrangular shape arranged in the left-right direction.

[0063] The temporary fixing portion 21S is positioned in the outer surface of the main front plate 21B higher than the center in the height direction and including the center in the left-right direction. The temporary fixing portion 21S is formed of a UV paint or the like applied to the main front plate 21B. The temporary fixing portion 21S temporarily fixes the wrapping film 50 pulled out from the opening 20T of the container main body 20 and hanging downward from the upper edge of the front plate 21 to the outer surface of the front plate 21.

[0064] The upper portion of the auxiliary front plate 21A has a restriction piece 3R, 4R (see Figure 2 ) extending in the front-rear direction.

[0065] The restriction pieces 3R, 4R are located at both end portions in the left-right direction of the upper edge of the auxiliary front plate 21A. The restriction pieces 3R, 4R are bent from the upper edge of the auxiliary front plate 21A in a grid line LR (see Figure 3 ). The restriction pieces 3R, 4R are arranged at both end portions in the left-right direction of the cylinder 50C and abut against the cylinder 50C when the wrapping film 50 is pulled out from the container main body 20, thereby suppressing the winding body 50R from being pulled out from the container main body 20.

[0066] The right side plate 23 has three flaps 13F, 23F, 53F (see Figure 3 ).

[0067] The left side plate 24 has three flaps 14F, 24F, 54F (see Figure 3 ).

[0068] Each of the flaps 13F, 14F, 23F, 24F constitutes the inner surface of the container main body 20. Each of the flaps 53F, 54F constitutes the outer surface of the container main body 20. Each of the flaps 23F, 24F is located inside the flap 13F and inside the flap 14F. The right side plate 23 and the left side plate 24 are one example of the body side plate.

[0069] The right side plate 23 has a cover locking piece 3T (see Figure 2 ) extending in the front-rear direction.

[0070] The left side plate 24 has a lid locking piece 4T (see Figure 2 ) extending in the front-rear direction.

[0071] The lid locking piece 3T is connected to the upper edge 3E of the fin 53F (see Figure 3 ) that constitutes the right side plate 23. The lid locking piece 3T is bent toward the outside (right side) of the container body 20 along the upper edge 3E of the fin 53F, and protrudes to the right side of the container body 20. The lid locking piece 3T extends in the front-rear direction.

[0072] The lid locking piece 4T is connected to the upper edge 4E of the fin 54F (see Figure 3 ) that constitutes the left side plate 24. The lid locking piece 4T is bent toward the outside (left side) of the container body 20 along the upper edge 4E of the fin 54F, and protrudes to the left side of the container body 20. The lid locking piece 4T extends in the front-rear direction.

[0073] [Cover 30]

[0074] Returning to Figure 1 , the cover 30 has an upper cover plate 31, a front cover plate 32, a cover right side plate 33, and a cover left side plate 34. The upper cover plate 31 is rotatably connected to the upper edge of the rear plate 22. The upper cover plate 31 rotates with the upper edge of the rear plate 22 as an axis with respect to the container body 20, and opens / closes the opening 20T of the container body 20. Hereinafter, the cover right side plate 33 and the cover left side plate 34 are also referred to as cover side plates.

[0075] The front cover plate 32 and the front plate 21 have rectangular plate shapes that are almost the same as each other. The upper edge of the front cover plate 32 is the front edge of the upper cover plate 31. The front cover plate 32 covers the entire outer surface of the front plate 21 in a state in which the cover 30 closes the opening 20T. The front cover plate 32 has a plurality of cutout portions 32C having semicircular shapes at a lower position than the middle in the height direction.

[0076] The inner surfaces of the cutout portions 32C are bonded to the outer surface of the front plate 21. The front cover plate 32 has a perforation line 32M that extends across the entire width in the left-right direction at substantially the center in the height direction. The perforation line 32M has a substantially V shape that faces downward from the top. The right end of the perforation line 32M is an opening end 32N for dividing the front cover plate 32 into upper and lower portions along the perforation line 32M.

[0077] When the opening end 32N is pulled in the front direction, the front cover plate 32 is cut along the perforation line 32M. In addition, the bonding of the front plate 21 to the front cover plate 32 is peeled off by the cutout portions 32C, and the front cover plate 32 is divided into the lower portion and the upper portion with the perforation line 32M as a boundary in the left-right direction.

[0078] The upper side of the front cover plate 32 divided by the perforation line 32M is a cover plate 32P. The lower side of the front cover plate 32 divided by the perforation line 32M is a cutout piece 32K, which is cut from the container main body 20 at the start of use of the wrapping film 50. When the cutout piece 32K is cut from the lid 30, the cutting edge 35 (refer to Figure 2 ) is exposed from the lower end of the cover plate 32P. Further, the opening 20T of the container main body 20 can be opened by rotating the upper edge of the rear plate 22 after the lid 30.

[0079] The cover plate 32P has a plate shape extending downward from the front edge of the upper cover plate 31 in a state in which the lid 30 closes the opening 20T, and covers the outer surface upper portion of the front plate 21. The width of the cover plate 32P in the height direction is largest at the central portion in the left-right direction, and becomes shorter as it moves from the central portion in the left-right direction to each end portion. The cover plate 32P is bent with respect to the upper cover plate 31 by the grid line L (refer to Figure 3 ) at the time of manufacture of the storage container 10.

[0080] The cutting edge 35 is joined to the inner surface of the cover plate 32P. The cutting edge 35 has a saw blade shape having blade tips arranged in the left-right direction. The cutting edge 35 is joined to the cover plate 32P in a state in which the lid 30 closes the opening 20T so that the plurality of blade tips protrude downward from the cover plate 32P. As a method of joining the cutting edge 35 to the cover plate 32P, for example, a sealing material, an adhesive layer is interposed between the cover plate 32P and the cutting edge 35, and ultrasonic bonding is performed. Alternatively, a sealing layer can be laminated to a blade material resin layer that constitutes the cutting edge 35.

[0081] The material that constitutes the cutting edge 35 is not particularly limited, and is, for example, a resin or a metal. The cutting edge 35 contains, for example, a resin and an additive, and the rigidity of the cutting edge 35 and the adhesiveness of the cutting edge 35 to the cover plate 32P can be adjusted by the kind of the additive and the amount of addition thereof.

[0082] The resin that constitutes the cutting edge 35 is, for example, a polyester resin such as polylactic acid, polyethylene terephthalate, polyethylene, polypropylene, polystyrene, acetal resin, polyphenylene sulfide, PEEK (polyether ether ketone) resin, PES (polyether sulfone) resin. The additive that constitutes the cutting edge 35 is, for example, a resin such as an olefin-based resin, and an inorganic material such as barium sulfate, calcium carbonate, titanium oxide, silica, talc. The resin that constitutes the sealing layer is, for example, a modified polyolefin in which a functional group is introduced into a polyolefin to impart adhesiveness, or the like.

[0083] The lid right side plate 33 has a lid right side plate 33F and a joining piece 323 (refer to Figure 2 ).

[0084] The left side plate 34 of the cover body includes a left side plate 34F and a connecting piece 324 (see reference). Figure 2 ).

[0085] The right side panel 33F is connected to the upper cover plate 31 via the short side of the line of intersection between the upper cover plate 31 and the right side panel 33F. The left side panel 34F is connected to the upper cover plate 31 via the short side of the line of intersection between the upper cover plate 31 and the left side panel 34F.

[0086] In the right side plate 33 and the left side plate 34 of the cover, each cover side plate 33F and 34F constitutes the outer surface of the cover 30, and each connecting piece 323 and 324 constitutes the inner surface of the cover 30. When the cover 30 is in the state of sealing the opening 20T, the right side plate 33 and the left side plate 34 cover the upper part of the outer surface of the right side plate 23, and also cover the upper part of the outer surface of the left side plate 24.

[0087] The connecting piece 323 is spaced apart and located between the short side of the line of intersection between the upper cover plate 31 and the right side cover plate 33F and the connecting piece 323. Similarly, the connecting piece 324 is also spaced apart and located between the short side of the line of intersection between the upper cover plate 31 and the left side cover plate 34F and the connecting piece 324. Thus, the connecting pieces 323 and 324, spaced apart and located between themselves and the upper cover plate 31, form stepped portions 33S and 34S on the inner surfaces of the right side cover plate 33 and the left side cover plate 34. When the cover 30 seals the opening 20T, the aforementioned cover retaining pieces 3T and 4T engage with the stepped portions 33S and 34S, producing a clicking sound. The engaging pieces 3T and 4T with the stepped portions 33S and 34S prevent the upper cover plate 31 from tilting up in the closed state.

[0088] [Assembly of the storage container with built-in winding]

[0089] like Figure 3 The unfolded container body is first bent along the grid lines that form the boundary between the main front panel 21B and the auxiliary front panel 21A, with the auxiliary front panel 21A positioned inside the container body 20, closer to the main front panel 21B than the main front panel 21B, and then fitted to the inside of the main front panel 21B. Next, the grid lines L that form the boundary between the bottom plate 25 and the rear plate 22, and the grid lines L that form the boundary between the upper cover plate 31 and the front cover plate 32, are bent, and the front cover plate 32 is folded over the main front panel 21B. Then, the lower part of the main front panel 21B is bonded to the shear sheet 32K in a way that allows it to be peeled off during use.

[0090] Next, the lines L as the boundary of the main front plate 21B and the bottom plate 25, and the lines L as the boundary of the back plate 22 and the upper cover plate 31 are bent, thereby forming a square-shaped cylinder. Then, the main body side plate of either side (the right side plate 23: 23F, 13F, 53F, the left side plate 24: 24F, 14F, 54F) and the cover body side plate (the cover body right side plate 33: 323, 33F, the cover body left side plate 34: 324, 34F) are folded in the order described in the parentheses, thereby forming the main body side plate and the cover body side plate of one side. That is, one side of the storage container 10 is closed. Next, the winding film roll 50R is inserted from the open side. Next, the main body side plate of the insertion side is formed, and the cover body side plate (the cover body right side plate 33: 323, 33F, the cover body left side plate 34: 324, 34F) in the cover body 30 is folded, and then bonded to form the cover body side plate. Thus, both sides of the storage container 10 are closed.

[0091] In Figure 4 the example, first, the left side plate 24 is formed, and the cover body left side plate 34 is formed.

[0092] Specifically, in order from the inside, first, the flap 24F is bent with respect to the line LT (refer to Figure 3 ) for the back plate 22. Next, the flap 14F is bent with respect to the line LT for the main front plate 21B. Then, the flap 54F is bent with respect to the line LT (refer to Figure 3 ) for the bottom plate 25. Then, the flaps 24F, 14F, and 54F are bonded by paste such as hot melt adhesive. Finally, the cover locking piece 4T is bent with the upper edge 4E of the flap 54F to the outside of the container main body 20.

[0093] Further, the engaging piece 324 is bent with respect to the line LT (refer to Figure 3 ) for the cover plate 32P, and then the cover left side plate 34F is bent with respect to the line LT (refer to Figure 3 ) for the upper cover plate 31. Finally, the cover left side plate 34F and the engaging piece 324 are bonded by paste such as hot melt adhesive. Thus, the cover body left side plate 34 covers the outer surface upper portion of the left side plate 24 in the state where the cover body 30 closes the opening 20T. Thus, the storage container 10 becomes in a state where the left side is closed.

[0094] Next, the left end of the cylinder 50C is set as the insertion end, and the winding body 50R is inserted into the inside of the storage container 10 from the right side in the open state. Normally, in the winding body 50R, the film end of the outermost winding film 50 on the insertion end side is inserted while rubbing against the inner surface of the storage container 10.

[0095] Next, the right side plate 23 is formed, and the cover body right side plate 33 is formed.

[0096] Specifically, in order from the inner side, the flaps 23F are bent with respect to the rear plate 22 along the lines LT (refer to Figure 3 ). Next, the flaps 13F are bent with respect to the front plate 21B along the lines LT. Next, the flaps 53F are bent with respect to the bottom plate 25 along the lines LT (refer to Figure 3 ). Next, the flaps 23F, 13F and 53F are adhered to each other by an adhesive such as a hot-melt adhesive. Finally, the lid tab 3T is bent with the upper edge 3E of the flap 53F to the outside of the container body 20.

[0097] Further, the engaging tab 323 is bent with respect to the cover plate 32P along the lines LT (refer to Figure 3 ). Next, the cover right side plate 33F is bent with respect to the upper cover plate 31 along the lines LT (refer to Figure 3 ). Finally, the cover right side plate 33F and the engaging tab 323 are adhered to each other by an adhesive such as a hot-melt adhesive. Thus, the storage container 10 becomes in a state where the right side is also closed.

[0098] [Coiled body]

[0099] The coiled body 50R is formed by coiling the wrapping film 50 around the cylindrical body 50C. The cylindrical body 50C has a length in the axial direction A that is longer than a length of the wrapping film 50 in the left-right direction (width direction), and both ends of the cylindrical body 50C in the axial direction A protrude beyond the film ends of the coiled wrapping film 50.

[0100] Figure 5 The right end face 52 of the coiled body 50R is shown in the opposite pair of end faces in the axial direction A. The wrapping film 50 forms a plurality of layers of the coiled body 50R, including an outermost layer 61 and one or more layers 62 that are inward of the outermost layer 61. The outermost layer 61 is sometimes referred to as a radially outermost layer. The inward layers 62 are sometimes referred to as one or more radially inward layers that are different from the outermost layer 61. Each layer of the wrapping film 50 has a film end. In the example shown in FIG. 6, in one end face (e.g., the right end face 52) of the coiled body 50R, an outermost layer film end 61E of the wrapping film 50 that constitutes the outermost layer 61 protrudes outwardly beyond a central side inward layer film end 63E, which is a film end of a layer 63 that is located at the most central side in the axial direction A among the layers 62 that are inward of the outermost layer 61. Figure 5

[0101] ​Here, the end face of the winding body 50R refers to a layer formed by the end of the winding film in the left-right direction (width direction) of the winding film when the winding film constituting the winding body 50R is wound in the circumferential direction of the cylinder 50C. The collection of the layers of the winding film ends is referred to as the end face. Further, the film end refers to the end of the winding film in the axial direction A among the winding film constituting the winding body 50R. Further, the outermost layer film end 61E refers to the film end of the winding film that becomes the outermost layer (outermost circumference) of the winding body 50R in the axial direction A. The central side inner layer film end 63E refers to the film end of the winding film constituting the layer that is the most central side in the axial direction A among the layers that are inward of the outermost layer. Further, the outer side refers to the direction of the end of the cylinder 50C in the axial direction A. The outer side is sometimes referred to as the axial outer side.

[0102] In the outermost layer 61, the portion 64 that protrudes outward of the central side inner layer film end 63E is set to a state that can be bent in the inner side direction of the right end face 52 or to a bent state. The inner side direction of the right end face 52 refers to the direction close to the cylinder 50C, and the state that can be bent or the bent state refers to a state in which the portion 64 that protrudes outward of the central side inner layer film end 63E can cover the right end face 52 or a state in which the right end face 52 is covered. Note that the state that can be bent or the bent state is included as long as the protruding amount X described below is greater than 0 mm.

[0103] As one example, the protruding amount X of the portion 64 that protrudes outward from the central side inner layer film end 63E is greater than 0 mm, and the film end is located at a position that does not exceed the end 53 of the cylinder 50C. That is, the protruding amount X from the central side inner layer film end 63E to the outermost layer film end 61E becomes the length from the right end face 52 to the end 53 of the cylinder 50C. The protruding amount X is the distance from the central side inner layer film end 63E to the film end that protrudes to the outermost side. In the case of Figure 5 , the protruding amount X is the distance from the central side inner layer film end 63E to the outermost layer film end 61E. In the case of Figure 6 , the protruding amount X is the distance from the central side inner layer film end 63E to the film end 66E of the third layer 66 that protrudes to the outermost side. In the case of Figure 7 , the protruding amount X is the distance from the central side inner layer film end 63E to the outermost layer film end 61E. Note that in any of the cases, the outermost layer film end 61E needs to protrude by more than 0 mm.

[0104] The protrusion amount X is also determined by a protrusion thickness that is the thickness of the film end protruding outward from the central side inner layer film end 63E, but is preferably 0.5 mm or more and 2.5 mm or less, and further preferably 0.5 mm or more and 2.0 mm or less. When the protrusion amount X is 0.5 mm or more and 2.5 mm or less, the outermost layer film end is bent inward of the end face, and thus the outermost layer film end 61E is less likely to contact the inner surface of the storage container 10 and is less likely to be damaged. Further, when the protrusion amount X is 0.5 mm or more and 2.0 mm or less, the appearance of the winding body 50R is also improved and thus is further preferred. The protrusion amount X is further preferably 0.5 mm or more and less than 1.5 mm.

[0105] In the outermost layer 61, the portion 64 protruding outward from the central side inner layer film end 63E is provided in a state of being bent inward of the right end face 52, or is bent inward of the right end face 52, and thus the portion 64 protruding outward covers the right end face 52. If the portion 64 protruding outward covers the right end face 52, the right end face 52 is covered by the portion 64 protruding outward, and thus damage to the right end face 52 is suppressed. Further, in the outermost layer film end 61E, the portion 64 protruding outward is bent inward of the right end face 52, and thus contact of the outermost layer film end 61E with the inner surface of the storage container 10 is suppressed, and thus the outermost layer film end 61E is less likely to be damaged.

[0106] Note that the wrapping film has stretchability in its characteristics, and thus if the protruding portion 64 is formed, the winding body 50R is easily naturally bent toward the inside of the end face at the time of winding.

[0107] Among the methods of making the outermost layer film end 61E protrude outward from the central side inner layer film end 63E, there are a method of relaxing the tension applied to the wrapping film in the winding direction, a method of offsetting to one direction in the axial direction A, and the like. In the present embodiment, the method of offsetting to the right in the axial direction A is adopted. In the method of offsetting to one direction in the axial direction A, one end face has a film end protruding outward in the axial direction A, and the other end face has a film end located on the central side in the axial direction A. The corner portion formed by the film end located on the central side has a gentle curve. The corner portion of the other end face has a gentle curve, and thus in the case of contacting the inner wall of the container or the like, stress is dispersed from the end face corner portion where stress is most likely to concentrate, and thus the film end of the surface layer is less likely to be damaged. Further, according to the method of relaxing the tension applied to the wrapping film in the winding direction, the portion protruding outward from the central side inner layer film end 63E can be formed in both the right and left end faces in the axial direction A. In both the right and left end faces, the outermost layer film end 61E protrudes outward from the central side inner layer film end 63E, and thus both the outermost layer film ends 61E are less likely to be damaged.

[0108] In Figure 5 or Figure 7In the example shown in FIG. 1, the right end of the winding body 50R is shown.

[0109] In Figure 5 the example shown in FIG. 1, the outermost layer film end 61E is protruded to the outermost side in the axial direction A with respect to the central side inner layer film end 63E. In other words, the outermost layer film end 61E is protruded to the outer side than the film end of all the layers 62 on the inner side of the outermost layer 61. If the outermost layer film end 61E is protruded to the outermost side in the axial direction A with respect to the central side inner layer film end 63E, damage to the outermost layer film end 61E can be more effectively suppressed. Further, the film end on the right end face 52 side is sometimes configured as in Figure 6 and Figure 7 .

[0110] In Figure 6 the example shown in FIG. 1, the outermost layer film end 61E is protruded to the outer side than the central side inner layer film end 63E of the layer 63 (the multiple layers of the fifth layer and below) located at the most central side in the axial direction A. Further, the film end 65E of the second layer 65 is further protruded than the outermost layer film end 61E. Further, the film end 66E of the third layer 66 is further protruded than the film end 65E of the second layer 65. That is, the film end 66E of the third layer 66 is most protruded to the outer side. The film end 67E of the fourth layer 67 is protruded only the same as the outermost layer film end 61E, and is not protruded as much as the film end 66E. In Figure 6 the example shown in FIG. 1, the second layer 65 and the third layer 66 are protruded more than the outermost layer 61, and the film ends 65E, 66E are protruded to the outer side than the outermost layer film end 61E. In Figure 6 the example shown in FIG. 1, the layer 63 of the fifth layer and below located at the most central side in the axial direction A, and the continuous multiple layers of the outermost layer to the fourth layer 61, 65, 66, 67 have a shape like a cornice. Note that in Figure 6 the example shown in FIG. 1, the continuous multiple layers of the outermost layer to the fourth layer have a shape like a cornice, but the continuous multiple layers of the outermost layer to the fourth layer can also be protruded with the same amount of protrusion. By the continuous multiple layers including the outermost layer 61 having a portion protruded to the outer side than the central side inner layer film end 63E, the impact at the time of bending of the portion and the impact at the time of rubbing against the inner surface of the container 10 can be absorbed and accommodated, and thus the generation of damage can be further suppressed.

[0111] In Figure 7In the example, the outermost membrane end 61E protrudes to the outermost side. Furthermore, although the protrusion is less than that of the outermost membrane end 61E, the membrane ends 65E of the second layer 65 and 66E of the third layer 66 protrude more than the central inner membrane end 63E of the layer 63 (a series of layers continuously inside from the fourth layer) located on the central side in the axial direction A. Here, in terms of protrusion, the membrane end 65E of the second layer 65 is greater than the membrane end 66E of the third layer 66. Moreover, the membrane ends 68E of the first lower layer 68 and the second lower layer 69 below the layer 63 located on the central side in the axial direction A are also more protruding than the central inner membrane end 63E. In terms of protrusion, the membrane end 69E of the second lower layer 69 is greater than the membrane end 68E of the first lower layer 68. Figure 7 In the example, the configuration is as follows: relative to the layer 63 located at the central side of the axial direction A, layers protruding above the layer 63 are provided above and below (on the radially outer and radially inner sides of the layer 63), and the portion of the inner layer membrane end 63E on the central side of the layer 63 is located in the valley portion.

[0112] like Figure 8 As shown, in the wound body 50R described above, the portion 64 of the outermost layer 61, including the outermost film end 61E, which protrudes outward from the inner film end 63E on the central side, is bent in the direction of the cylinder 50C, which is the inner side of the right end face 52. If the wound body 50R is inserted into the storage container 10 with the protruding portion 64 bent, the outermost film end 61E is less likely to contact the inner surface of the storage container 10, thus preventing damage to the outermost film end 61E. Furthermore, since the protruding portion 64 covers the right end face 52, damage to the inner film, including the film end, is prevented. Additionally, although not shown, as... Figure 6 and Figure 7 As shown, the protruding portions of each membrane end 65E, 66E, and 67E, which protrude beyond the central inner membrane end 63E, also bend toward the cylinder 50C.

[0113] However, in Figure 7 In the middle, the membrane ends 68E and 69E, which are located inside the central inner membrane end 63E, do not bend even though they protrude outward from the central inner membrane end 63E, and therefore do not contribute to the prevention of membrane end damage.

[0114] [Methods for transporting storage containers]

[0115] like Figure 9As shown, the housing container 10 that accommodates the winding body 50R is transported in a state of standing in a transport case 70 having a rectangular parallelepiped shape such as a corrugated box. The housing containers 10 are accommodated in a manner that the housing containers 10 that are adjacent to each other in the transport case 70 are in close contact with each other. Therefore, the housing containers 10 hardly shake in the transport case 70. However, the winding body 50R housed in each of the housing containers 10 shakes in each of the housing containers 10 because of some gaps between the housing container 10 and the winding body 50R. Therefore, the winding body 50R in the housing container 10 repeatedly contacts the inner surface of the housing container 10 with the wrapping film 50 of the outermost layer 61 due to vibrations during transportation. The portion that protrudes to the outer side with respect to the central side inner layer film end 63E is bent in the direction of the cylindrical body 50C to become a bent portion 71.

[0116] The bent portion 71 is formed in the portion that protrudes to the outer side than the central side inner layer film end 63E. Thereby, the portion that contacts the inner surface of the housing container 10 due to vibrations and the like is not the outermost layer film end 61E but a position slightly closer to the center of the axial direction A than the outermost layer film end 61E, and a damage mark 72 such as a damage or a scratch is formed at the position.

[0117] Figure 10 is a plan view that schematically shows a state in which the winding body 50R is taken out of the unused housing container 10 and the outermost layer 61 is opened. In the outermost layer 61, the damage mark 72 is formed at a position slightly closer to the center of the axial direction A than the outermost layer film end 61E.

[0118] The wrapping film 50 is cut by the cutting blade 35 provided in the housing container 10 when the wrapping film 50 is taken out of the housing container 10. At the time of cutting, cutting failure in which the wrapping film 50 is cut in a direction that is not intended by the user sometimes occurs. The main cause of the cutting failure is a damage mark formed in the film end. In this regard, by providing the bent portion 71 in the wrapping film 50, the damage mark 72 is formed at a position slightly closer to the center of the axial direction A than the outermost layer film end 61E, and the damage mark 72 is not formed at the outermost layer film end 61E. Therefore, it is possible to suppress the occurrence of the cutting failure.

[0119] In the winding body 50R in the housing container 10, there is a tendency that the outermost layer 61 on the upper side is more damaged than the outermost layer 61 on the lower side due to vibrations during transportation. The reason is that the winding body 50R is shaken more on the upper side than on the lower side in the housing container 10. Therefore, the housing container 10 is accommodated in the transport case 70 in a manner that the end portion of the winding body 50R in which the bent portion 71 is formed is on the upper side. Thereby, it is possible to make it difficult for the damage mark 72 to be formed at the outermost layer film end 61E.

[0120] It should be noted that the protrusion amount X from the inner membrane end 63E on the central side is greater than 0 mm, and preferably is the length of membrane ends 61E, 65E, 66E, and 67E located no more than the end 53 of the cylinder 50C. That is, the protrusion amount X of membrane ends 61E, 65E, 66E, and 67E is preferably the length of membrane ends 61E, 65E, 66E, and 67E from the end face of the winding body 50R to the end 53 of the cylinder 50C.

[0121] If membrane ends 61E, 65E, 66E, and 67E protrude even slightly from the inner membrane end 63E on the central side, a bend 71 is formed in the portion 64 that protrudes beyond the inner membrane end 63E on the central side. As a result, in the outermost layer 61, a damage mark 72 is formed at a position slightly closer to the center of the axial direction A than the outermost membrane end 61E. On the other hand, if membrane ends 61E, 65E, 66E, and 67E protrude beyond the end 53 of the cylinder 50C, the portion may become trapped between the end 53 of the cylinder 50C and the inner surface of the receiving container 10, potentially leading to damage.

[0122] In addition, such as Figure 11 As shown, preferably, the protrusion amount from the innermost membrane end 63E on the central side to the outermost membrane end among the membrane ends 61E, 65E, 66E, and 67E that protrude outward from the innermost membrane end 63E on the central side is defined as X; the overall thickness from the innermost membrane end 75E of the innermost membrane layer 75 that contacts the outer peripheral surface of the cylinder 50C to the outermost membrane end 61E is defined as T1; and the thickness of the membrane end that protrudes outward from the innermost membrane end on the central side is defined as the protrusion thickness Y. This satisfies (1) Y ≤ 1.25X and (2) X > 0. Here, the maximum value of X is the distance from the innermost membrane end 63E on the central side to the end 53 of the cylinder 50C. X and Y can be appropriately selected as long as they are within the range satisfying the relationships (1) and (2) above. As long as the membrane ends 61E, 65E, 66E, and 67E are within this range, layers 61, 65, 66, and 67, including membrane ends 61E, 65E, 66E, and 67E, can be bent towards the cylinder 50C to form a bend 71. Furthermore, due to the elasticity of the bend, the impact during friction with the inner surface of the storage container 10 can be mitigated. Therefore, the bend 71 is formed at the portion 64 protruding from the inner membrane end 63E on the outermost layer 61, making it less prone to damage marks 72 on the outermost membrane end 61E.

[0123] [Example]

[0124] <Experiment 1>

[0125] In Experiment 1, a reproduction experiment was conducted when the wound body 50R was placed in the storage container 10, verifying that damage marks 72 were generated on the portion 64 of the outermost layer 61 of the wound body 50R that protrudes beyond the central inner layer membrane end 63E. Experiment 1 was conducted under the assumption that the membrane end is easily damaged.

[0126] like Figure 12 As shown, the experimental apparatus 80 includes an olefin-based resin pad 81 (trade name: Kokuyo Cutting Mat, product number Ma-44N) and a platform 82 placed on the pad 81. Then, a wound body 50R is placed on the pad 81 and tilted using the platform 82. Specifically, the axial center of a 30cm × 50m wound body 50R (trade name "Newkrewrap": manufactured by KUREHA Co., Ltd.) is placed on the platform 82 at a height of 10mm. Then, the wound body 50R is manually moved at a speed of 30mm / s for 5 seconds, pushing it by friction between the portion 64 of the outermost layer 61, which protrudes beyond the central inner layer film end 63E, and the pad 81. The state of damage formation in the film end of the outermost layer 61 is then observed.

[0127] In Experiment 1, pushing the winding body 50R 150mm over 5 seconds at a speed of 30mm / s is assumed to be the insertion speed during manufacturing. The winding body 50R is subjected to its own weight (approximately 400g) during the pushing process. Furthermore, the end face shape of the winding body 50R that results in 0 is approximately... Figure 7 The shape of the outermost membrane, with the outwardly protruding portion 64, is such that it can be bent inward toward the end face, or is in a bent state. The results are shown in Table 1. The evaluation criteria are set as follows: 0: No curling or gap at the outermost membrane end; ×: There is curling (caused by the gap) or gap at the outermost membrane end.

[0128] [Table 1]

[0129] Amount of protrusion mm Result Amount of protrusion mm Result No. 1 -0.5 X (crimped) No. 12 0.8 〇 No. 2 -0.03 X (crimped) No. 13 1.0 〇 No. 3 0 X (crimped) No. 14 1.4 〇 No. 4 0.04 〇 No. 15 1.8 〇 No. 5 0.05 〇 No. 16 2.0 〇 No. 6 0.1 〇 No. 17 2.7 〇 No. 7 0.2 〇 No. 18 3.0 〇 No. 8 0.3 〇 No. 19 4.0 〇 No. 9 0.4 〇 No. 20 5.0 〇 No. 10 0.5 〇 No. 21 6.0 〇 No. 11 0.6 〇 No. 22 6.8 〇

[0130] Here, the emphasis is on quantity, such as Figure 5 As shown, X is the amount of protrusion of the outermost membrane end 61E from the central inner membrane end 63E. A positive number indicates that the outermost membrane end 61E protrudes outward relative to the central inner membrane end 63E, while a negative number indicates that the outermost membrane end 61E is located inside the central inner membrane end 63E (central side of axis A). Furthermore, 0 indicates that the outermost membrane end 61E is located at the same position as the central inner membrane end 63E along axis A.

[0131] When the protrusion amount is negative or 0, a rolled edge (No.1, No.2, No.3) is formed at the outermost membrane end 61E as a damage mark 72.

[0132] On the other hand, in the case where the protrusion amount is positive even if it is small, no damage mark 72 such as a crimp, a scratch mark, or the like is formed at the outermost layer film end 61E. That is, the damage mark 72 is not formed at the outermost layer film end 61E, but is formed at a position slightly closer to the axial center A than the outermost layer film end 61E.

[0133] Further, the wound bodies 50R of Nos. 1 to 22 were housed in the housing container 10 made of the coated paperboard, the wrapping film 50 was pulled out of the housing container 10, cut by the cutting blade 35 provided to the housing container 10, and the occurrence of the cutting failure was confirmed. As a result, the cutting failure did not occur in Nos. 4 to 22. On the other hand, in Nos. 1 to 3, the damage caused by the crimp of the film end was a starting point, the wrapping film 50 was broken in an undesirable direction, and the occurrence of the cutting failure was observed.

[0134] <Experiment 2>

[0135] In the wound body 50R of the 30 cm x 50 m roll (trade name "newkrewrap" made by KUREHA Co., Ltd.), the outermost layer film end 61E was pushed against the cushion 81 in the same manner as in Experiment 1. Then, the damage generation state of the end surface was observed. The protrusion amount in this case was 2 mm. Further, the end surface shape of the wound body 50R for which the result was O was a shape close to Figure 6 the shape shown in FIG. 6, and the portion 64 protruding to the outside became a state where it could be bent to the inside of the end surface, or became a bent state.

[0136] Here, the protrusion thickness of the portion having the protrusion amount of 2 mm is the thickness in the direction from the outermost layer film end 61E to the innermost layer film end 75E, and is the thickness including the outermost layer film end 61E and the film end protruding to the outside of the central side inner layer film end 63E. (Refer to Figure 11 ). The results thereof are shown in Table 2. The evaluation criteria were the same as in Experiment 1.

[0137] [Table 2]

[0138]

[0139]

[0140] In the case where the protrusion amount is 2 mm, in the range where the protrusion thickness satisfies the above-described (1) and (2) relational expressions, no damage mark 72 such as a crimp, a scratch mark, or the like is formed at the outermost layer film end 61E, and the damage mark 72 is formed at a position slightly closer to the axial center A than the outermost layer film end 61E.

[0141] When the protruding thickness was 0.05 mm (No. 31), the damage mark 72 was not formed at the outermost layer film end 61E but was formed slightly toward the axial A center from the outermost layer film end 61E. When the protruding thickness was 3.0 mm (No. 39), a curl was confirmed at the outermost layer film end 61E. It is considered that the reason why the curl was confirmed at the outermost layer film end 61E when the protruding thickness was 3.0 mm is that the layers having the portion protruding more than the inner layer film end 63E on the central side became more and thicker, and thus the degree of bending of the bent portion 71 in the outermost layer 61 with respect to the end surface became small, and the outermost layer film end 61E contacted the installation surface.

[0142] Further, the results in the case where the protruding amount was 1 mm are shown in Table 3.

[0143] [Table 3]

[0144] End face protrusion thickness (mm) Result No. 41 0.05 mm (equivalent to a coil wound 5 times) 〇 No. 42 0.1 mm (equivalent to a coil wound 10 times) 〇 No. 43 0.25 mm (equivalent to a coil wound 25 times) 〇 No. 44 0.5 mm (equivalent to a coil wound 50 times) 〇 No. 45 1.0 mm (equivalent to a coil wound 100 times) 〇 No. 46 1.25 mm (equivalent to a coil wound 125 times) 〇 No. 47 1.5 mm (equivalent to a coil wound 150 times) ×

[0145] In the case where the protruding amount was 1 mm, it was confirmed that until the protruding thickness was 1.25 mm, the damage mark 72 such as a curl or a scratch was not formed at the outermost layer film end 61E. That is, it was confirmed that the damage mark 72 was formed at a position slightly toward the axial A center from the outermost layer film end 61E. It is considered that the reason why the curl was confirmed at the outermost layer film end 61E when the protruding thickness was 1.5 mm is that the layers having the portion protruding more than the inner layer film end 63E on the central side became more and thicker, and thus the bent portion 71 in the outermost layer 61 was not easily bent, the degree of bending with respect to the end surface became small, and the outermost layer film end 61E contacted the installation surface. Further, in terms of the degree of bending, the protruding amount in the case of 1 mm was smaller than that in the case of 2 mm, and accordingly the bent portion 71 was not easily bent. Therefore, in the case of 1 mm, the curl was not confirmed at the outermost layer film end 61E from 3.0 mm as in the case of 2 mm, but was confirmed at the outermost layer film end 61E from 1.5 mm. Therefore, the protruding amount and the protruding thickness can be set in such a manner as to satisfy the relational expression of (1) and (2) described above.

[0146] The wound bodies 50R of Nos. 31 to 47 were housed in the housing container 10 made of a coated paperboard, the wrapping film 50 was pulled out from the housing container 10, was cut by the cutting blade 35 provided to the housing container 10, and the occurrence of the cutting failure was confirmed. As a result, except for Nos. 39 and 47, the cutting failure did not occur. On the other hand, Nos. 39 and 47 started from the damage caused by the curl of the film end, the wrapping film 50 was split in an undesirable direction, and the occurrence of the cutting failure was observed.

[0147] <Experiment 3>

[0148] The storage container 10 is transported in a state of standing in the transport case 70, in which a vibration is applied. Thus, in Experiment 3, a transport experiment reproducing the vibration at the time of transport was performed, and the damage marks 72 formed in the outermost layer film end 61E in the upper end and the lower end of the roll body 50R were confirmed.

[0149] Specifically, a roll body 50R of 30 cm x 50 m roll (trade name "newkrewrap"; manufactured by KUREHA Co., Ltd.) was stored in the storage container 10. The storage container 10 was a rectangular parallelepiped container made of one sheet of coated paperboard. The sample roll bodies 50R were a roll body 50R in which the positions of the film ends in the axial direction A from the outermost layer film end 61E to the innermost layer film end 75E were the same (control), a roll body 50R in which the protruding amount from the central side innermost layer film end 63E to the outermost layer film end 61E was 1 mm, and a roll body 50R in which the protruding amount was 2 mm. In the case of the roll bodies 50R in which the protruding amount was 1 mm and 2 mm, the film end protruded in one of the both end faces in the axial direction of the roll body 50R, and the portion 64 protruding to the outside became a state in which it could be bent to the inside of the end face, or became a bent state. The storage container 10 was inserted from the side of the end face having the film end protruding, and a storage container with the roll body built-in was produced. Thirty of these storage containers with the roll body built-in were housed in a corrugated case (inner dimensions: 23 cm x 28 cm x 32 cm) so that the side having the end face with the film end protruding was the upper side, and so that no gap was generated, and were arranged so that the axial direction A of the roll body was perpendicular to the transport experiment device, and a vibration was applied using a transport experiment device ("Transport Packaging Tester BF-50FT"; manufactured by iDEX Co., Ltd.). In Experiment 3, movements in which the direction of the vibration was different were performed for 5 minutes x 4 kinds (equivalent to 20 minutes of travel in total, 1000 km, etc.). Then, whether or not the outermost layer film end 61E of the upper end (upper side) had a damage mark 72 was confirmed. Note that the damage mark 72 was set to damage generated within 0.2 mm to the central side in the axial direction A from the film end. Damage formed 0.3 mm or more to the central side in the axial direction A was excluded.

[0150] The results thereof are shown in Figure 13 . In Figure 13 , the "insertion side" indicates the side that is first inserted into the storage container 10 when the roll body 50R is inserted into the storage container 10. The insertion side is the upper side at the time of transport.

[0151] If the results of the control are observed, it can be confirmed that the outermost layer 61 of the roll body 50R is damaged to form a damage mark 72 in the insertion side due to the vibration at the time of transport.

[0152] Furthermore, it can be confirmed that the roll body 50R in which the protruding amount was 1 mm and the roll body 50R in which the protruding amount was 2 mm do not have a damage mark 72, or have a very small number of damage marks 72, in the outermost layer film end 61E of the insertion side.

[0153] <Effects of Embodiments>

[0154] The storage container 10 as described above can obtain the effects listed below.

[0155] (1) The outermost layer 61 is bent inward of the end surface 52 at the portion protruding outward of the central-side inner layer film end 63E, whereby it is possible to suppress the formation of damage marks 72 in the outermost layer film end 61E due to friction with the inner surface of the storage container 10 or the like. The damage marks 72 are not formed in the outermost layer film end 61E, but are formed in the central portion slightly further in the axial direction A. Thus, it is possible to suppress the occurrence of cutting failure caused by damage to the outermost layer film end 61E.

[0156] (2) The outermost layer film end 61E protrudes outward of the central-side inner layer film end 63E the most, whereby it is possible to more effectively suppress the formation of damage marks 72 in the outermost layer film end 61E due to friction with the inner surface of the storage container 10 or the like.

[0157] (3) When the amount of protrusion of the film end protruding the most outward is set as X (mm), the direction from the outermost layer film end 61E to the innermost layer film end 75E is set as the thickness direction, and the thickness of the film end protruding outward of the central-side inner layer film end is set as Y (mm), the film ends 61E, 65E, 66E, 67E are located in a range satisfying the following relationships: (1) Y < 1.25X and (2) X > 0. If the film ends 61E, 65E, 66E, 67E are located in this range, it is possible to form the bent portion 71 in the outermost layer 61 including the outermost layer film end 61E.

[0158] (4) The film ends 61E, 65E, 66E, 67E protruding outward of the central-side inner layer film end 63E protrude from the central-side inner layer film end 63E by more than 0 mm. Therefore, the portion protruding outward of the central-side inner layer film end 63E can be bent in the direction of the cylindrical body 50C in a manner covering the end surface, and the bent portion 71 is formed in the portion 64 of the outermost layer 61 protruding outward of the central-side inner layer film end 63E. Thus, it is possible to suppress the formation of damage marks 72 in the outermost layer film end 61E.

[0159] (5) Furthermore, the film ends 61E, 65E, 66E, 67E protruding outward of the central-side inner layer film end 63E are located not to exceed the position of the end portion 53 of the cylindrical body 50C. Thus, the film ends 61E, 65E, 66E, 67E are sandwiched between the end portion 53 of the cylindrical body 50C and the inner surface of the storage container 10, and it is possible to suppress damage.

[0160] (6) With the wrapping film 50 in which a vinylidene chloride-based resin is used as the main component, it is possible to suppress the formation of damage marks 72 in the outermost layer film end 61E.

[0161] (7) The damage mark 72 formed at the outermost layer film end 61E due to friction with the inner surface of the storage container 10 or the like can be suppressed.

[0162] (8) In the process of manufacturing the storage container with the wound body, in which the wound body 50R is stored in the storage container 10 at 50R, the damage mark 72 formed at the outermost layer film end 61E due to friction with the inner surface of the storage container 10 or the like can be suppressed.

[0163] (9) The storage container 10 is transported in a state of standing in the transport case 70. The wound body 50R in the storage container 10 is more likely to form the damage mark 72 at the upper side of the outermost layer film end 61E than at the lower side due to vibration during transportation. In this regard, the storage container 10 is transported with the side having the bent portion 71 of the outermost layer 61 set as the upper side. Thus, the damage mark 72 formed at the outermost layer film end 61E due to friction with the inner surface of the storage container 10 or the like at the upper side can be suppressed.

[0164] Note that the storage container 10 can also be implemented by being appropriately modified as described below.

[0165] • The outermost layer film end 61E protruding more than the central side inner layer film end 63E can be provided not only to the right end face 52 but also to the left end face. In the case where the outermost layer film end 61E protruding more than the central side inner layer film end 63E is provided to both the left and right end faces, it is preferable that the wound film 50 be wound to the bobbin 50C by a method of relaxing the tension applied to the wound film 50 in the winding direction. By providing the outermost layer film end 61E protruding more than the central side inner layer film end 63E to both the left and right end faces, the generation of the damage mark 72 can be suppressed at both the left and right ends of the wound body 50R.

[0166] By forming the outermost layer film end 61E protruding more than the central side inner layer film end 63E at both the left and right ends of the wound body 50R, the wound body 50R can be stored in the storage container 10 without controlling the left and right ends. Further, when the storage container 10 is stored in the transport case 70, it can be stored without controlling the upper and lower sides. Moreover, at the time of transportation, both the upper and lower ends of the wound body 50R can be suppressed from forming the damage mark 72 at the outermost layer film end 61E.

[0167] • In the transport case 70, the storage container 10 can also be stored not in a standing state but in a lying state.

[0168] • When the outermost layer film end 61E protruding more than the central side inner layer film end 63E is provided, it can also be a method other than the method of relaxing the tension applied to the wound film 50 in the winding direction, the easy method of being offset in one direction in the axial direction, or the like. For example, in the portion constituting the outermost layer 61, trimming that widens the width of the axial direction A of the wound film 50 can also be performed.

[0169] • The radial thickness of the film end that protrudes outward from the central side inner layer film end 63E is not particularly limited as long as it is a thickness that enables formation of the bent portion 71 at the outermost layer film end 61E.

[0170] • The outermost layer film end 61E, 65E, 66E, 67E that protrudes outward from the central side inner layer film end 63E can be longer than the end portion 53 of the cylinder 50C as long as the portion is not easily caught between the end portion 53 and the inner surface of the storage container 10.

[0171] • The outermost layer film end 61E that protrudes outward from the central side inner layer film end 63E can protrude in at least a portion in the circumferential direction. In this case, it is preferable that the outermost layer film end 61E protrude outward in at least half of the circumferential direction, and more preferably protrude outward in the entire circumferential direction. When the wound body 50R is inserted into the storage container 10, it is sufficient to insert it in a manner such that the protruding portion comes into contact with the inner surface of the storage container 10. Further, as one example, it can also be configured such that the outermost layer film end 61E that protrudes outward from the central side inner layer film end 63E protrudes in at least a portion in the circumferential direction, and in the second layer or layers below the second layer, the inner layer film end protrudes outward in the entire circumferential direction.

[0172] Symbol Explanation

[0173] 10 …… Storage container

[0174] 20 …… Container body

[0175] 20T …… Opening

[0176] 30 …… Lid

[0177] 35 …… Cutting edge

[0178] 50 …… Winding film

[0179] 50C …… Cylinder

[0180] 50R …… Winding film wound body

[0181] 52 …… Right end surface

[0182] 53 …… End portion

[0183] 61 …… Outermost layer

[0184] 61E …… Outermost layer film end

[0185] 63E …… Central side inner layer film end

[0186] 64 …… Protruding portion

[0187] 65, 66, 67 …… Layer

[0188] 65E, 66E, 67E... film end

[0189] 70... transport box

[0190] 71... bend

[0191] 72... damage mark

[0192] 75... innermost layer

[0193] 75E... innermost film end

Claims

1. A wrapping film roll body wound with wrapping films, at both ends in the axial direction of the wrapping film roll body, the wrapping films forming the next outer layer are directly wound on the wrapping films forming the inner layer of the wrapping film roll body, only at one end face of the both ends in the axial direction of the unused wrapping film roll body, at least a part of the outermost layer film end of the wrapping film constituting the outermost layer protrudes outward more than the central side inner layer film end, the central side inner layer being a layer in which the film end is located at the most central side in the axial direction among the layers inward of the outermost layer, in the wrapping film constituting the outermost layer, the part protruding outward more than the central side inner layer film end is set to a state capable of being bent inward of the one end face or is bent.

2. The wrapping film roll body according to claim 1, wherein at least a part of the outermost layer film end protrudes outward more than the film end of all the layers inward of the outermost layer in the axial direction.

3. The wrapping film roll body according to claim 1 or 2, wherein when a protruding amount of the film end protruding outward most among the film ends protruding outward more than the central side inner layer film end including the outermost layer film end is set to X, and a thickness of the film end protruding outward more than the central side inner layer film end is set to a protruding thickness Y, the following relational expressions (1) and (2) are satisfied: (1) Y < 1.25X (2) X > 0, wherein the unit of the X is mm and the unit of the Y is mm.

4. The wrapping film roll body according to claim 1 or 2, wherein the film end protruding outward more than the central side inner layer film end including the outermost layer film end protrudes more than 0 mm from the central side inner layer film end and is located at a position not exceeding the end portion of the core material.

5. The wrapping film roll body according to claim 1 or 2, wherein a main component of the wrapping film is a vinylidene chloride-based resin.

Images