Wrap film roll, storage container, method for manufacturing storage container containing wrap film roll, and method for transporting storage container

Abstract

To provide a wrap film rewinding body which is easy to make and protects ends of the outermost layer film from damage.SOLUTION: The present invention provides a wrap film rewinding body on which a wrap film is rewound, at least on one end face of the two opposite end faces in the axial direction of the unused wrap film rewinding body, at least on a part of the outermost layer film end 61E of the wrap film that constitutes an outermost layer 61, the film end protrudes outward from a central inner layer film end 63E of the layer located on the most central side in the axial direction among the layers inside the outermost layer 61, and in the wrap film forming the outermost layer 61, a portion 64 protruding outward from the central inner layer film end 63E is in a bendable state or in a bent state toward the center of one end face.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a wrap film roll having a wrap film wound thereon, a storage container, a method for manufacturing a storage container containing a wrap film roll, and a method for transporting a storage container. [Background technology]

[0002] Wrap films, whose main components are vinylidene chloride resins, have properties such as high adhesion and good cutting ability. The wrap film is pulled out of a storage container that contains a roll of wrap film, and is cut by a cutting blade attached to the storage container. Because wrap film is extremely thin, at around 10 μm, it can tear in an unintended direction when cut. Hereinafter, such a phenomenon will be referred to as "cutting trouble."

[0003] One of the causes of cutting troubles is scratches formed on the end of the outermost layer of the wrap film that constitutes the outermost layer. Cutting troubles occur when the wrap film starts from the scratches and tears in a direction unintended by the user. The outermost layer of the wrap film roll is the layer that directly contacts the inner surface of the storage container, and therefore, the scratches can be formed when the end of the wrap film of the outermost layer rubs against the inner surface of the storage container when the wrap film roll is stored in the storage container. In addition, the scratches can be formed when the end of the wrap film of the outermost layer rubs against the inner surface of the storage container due to vibrations applied to the wrap film roll before it is used, such as vibrations during transportation of the storage container containing the wrap film roll.

[0004] In Patent Document 1, the wrap film roll is configured so that the width in the width direction of the wrap film narrows toward the outermost periphery. This prevents scratches on the film edge caused by friction between the film edge and the inner surface of a storage container due to vibrations applied until the wrap film roll is first used, such as vibrations during transportation of a storage container containing the wrap film roll, and suppresses the occurrence of cutting problems. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2014-234271 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the wrap film roll in Patent Document 1 is configured so that the width of the wrap film in the width direction narrows toward the outermost circumference. This makes it necessary to control the width of the wrap film in the width direction when winding the wrap film around the roll core. This makes the manufacturing method complicated, and there is a risk of reducing manufacturing efficiency.

[0007] Furthermore, when the wrap film roll of Patent Document 1 is stored in a storage container, the ends of the wrap film rub against the inner surface of the storage container, making it easy for scratches to form on the film ends and potentially making it difficult to adequately prevent cutting problems. [Means for solving the problem]

[0008] A wrap film roll for solving the above problem is a wrap film roll in which a wrap film is wound, At both ends of the wrap film roll facing each other in the axial direction, the wrap film forming the next outer layer is directly wound around the wrap film forming the inner layer of the wrap film roll, An unused wrap film roll The above On one of the two opposing end faces in the axial direction only At least a portion of the outermost layer film end of the wrap film constituting the outermost layer protrudes outward from the central inner layer film end of the layer located most centrally in the axial direction among the layers inner than the outermost layer, and the portion of the wrap film constituting the outermost layer that protrudes outward from the central inner layer film end is in a state in which it can be folded inwardly toward the one end face, or is in a folded state.

[0009] According to the above configuration, the portion of the outermost wrap film that protrudes outward from the end of the central inner layer film is bent inwardly from one end face, thereby preventing the end of the outermost layer film from being scratched by rubbing against the inner surface of the container. The scratch is not formed at the end of the outermost layer film, but slightly closer to the center in the axial direction. This makes it possible to prevent cutting problems caused by scratching the end of the outermost layer film. In the process of wrapping the wrap film around the core material, the end of the outermost layer film can be made to protrude outward from the end of the central inner layer film by a simple method such as relaxing the tension applied to the wrap film in the winding direction or shifting it in one direction in the axial direction.

[0010] In the wrap film roll, the outermost film end may protrude outwardly from the central inner film end in the axial direction to the greatest extent possible. With this configuration, the outermost film end protrudes outwardly from the central inner film end, making it possible to more effectively prevent the outermost film end from being scratched by friction with the inner surface of a container, for example.

[0012] In the above wrap film roll, when the protruding amount to the outermost film end among the film ends protruding outward from the central inner layer film end, including the outermost layer film end, is defined as X (mm), and the thickness of the film end protruding outward from the central inner layer film end is defined as Y (mm), the following relationship formulas (1) and (2) may be satisfied. (1) Y≦1.25X (2) X>0 According to the above configuration, even in layers other than the outermost layer, the portions protruding outward from the end of the central inner layer film can be folded inward toward the end surface. Since multiple layers are folded inward toward the end surface, the folded portions have flexibility and can better cushion the impact. This further prevents the end of the outermost layer film from being scratched. In addition, the elasticity of the folded portions can cushion the impact when rubbing against the inner surface of the storage container.

[0013] In the above wrap film roll, the film ends that protrude outward beyond the central inner layer film end, including the outermost layer film end, may be configured to protrude more than 0 mm from the central inner layer film end and to be positioned at a position that does not extend beyond the end of the core material.

[0014] According to the above-mentioned configuration, the portion protruding outward from the end of the central inner layer film can be bent inwardly of the end face, making it difficult to damage the end of the outermost layer film. Also, by positioning the portion so as not to exceed the end of the core material, it is possible to prevent the portion from being pinched between the end of the core material and the inner surface of the storage container and being damaged.

[0015] In the wrap film roll, the wrap film may contain a vinylidene chloride resin as a main component. According to the above configuration, damage to the outermost film edge of the wrap film containing a vinylidene chloride resin as a main component can be suppressed.

[0016] A storage container for solving the above problem includes the wrap film roll described above and a container body for storing the wrap film roll in. With the above configuration, it is possible to prevent the end of the outermost film from being damaged by rubbing against the inner surface of the packaging container due to vibrations applied to the wrap film roll until it is first used, such as vibrations during transportation.

[0017] A manufacturing method for a storage container containing a wrap film roll to solve the above-mentioned problems is a manufacturing method for a storage container containing a wrap film roll as described above, in which the container body that contains the wrap film roll has an opening on one of multiple side surfaces in the circumferential direction of the wrap film roll through which the wrap film roll can be inserted and removed, and a pair of side plates that cover the side surfaces facing each other in the axial direction, and the lid body that is rotatably attached to the container body has an upper cover plate that opens and closes the opening, and a pair of lid side plates connected to short sides of the upper cover plate, and with the upper cover plate covering the opening and one side plate and one lid side plate covering one side of the container body and the other side plate and the other lid side plate open, the wrap film roll is inserted into the container body from the opening on the other side, with the end face at which the outermost layer film end protrudes outward beyond the central inner layer film end as the insertion end, and then the other side is covered with the other side plate and the other lid side plate.

[0018] According to the above configuration, in the process of storing a wrap film roll in a storage container and manufacturing a storage container containing the wrap film roll, it is possible to prevent the end of the outermost film from being damaged by rubbing against the inner surface of the storage container.

[0019] A method for transporting a storage container to solve the above problem is a method for transporting a storage container as described above, in which the storage container is transported with the end face of the wrap film roll on which the outermost layer film end protrudes outward beyond the central inner layer film end facing up.

[0020] The storage container is transported in an upright state in a transport box. The wrap film roll in the storage container tends to be damaged more at the upper outermost film end than at the lower end due to vibration during transport. This is because the upper side of the wrap film roll in the storage container vibrates more than the lower side. According to the above configuration, the storage container is transported with the end face of the outermost film end of the wrap film roll that protrudes outward beyond the central inner film end facing upward. Therefore, it is possible to prevent the upper outermost film end, which vibrates more during transport, from being damaged due to rubbing against the inner surface of the storage container. Effect of the Invention

[0021] According to the present invention, it is possible to provide a wrap film roll that is easy to manufacture and that prevents scratches from being formed on the ends of the outermost film. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view showing an embodiment of a storage container containing a roll in an unopened state. [Diagram 2] 2 is a perspective view of the storage container containing the wound body of FIG. 1 with the lid open. FIG. [Diagram 3] 10 is a plan view showing the structure of an intermediate body for manufacturing a container body. FIG. [Figure 4] FIG. 2 is a perspective view of a main part showing a state in which the wound body is stored in a storage container. [Diagram 5] 2 is a front view of a main portion, showing a schematic right end face of a wound body used in the storage container shown in FIG. 1. [Figure 6] 6 is a front view of a main portion, which illustrates a schematic diagram of another example of the right end surface of the wound body shown in FIG. 5. [Figure 7] 6 is a front view of a main portion, which illustrates a schematic diagram of another example of the right end surface of the wound body illustrated in FIG. 5. [Figure 8] 6 is a front view of a main portion of the right end face of the roll shown in FIG. 5, showing a state in which a protruding portion from an end of an inner layer film in the outermost layer is bent inwardly from the end face. [Figure 9]2 is a perspective view showing a state in which the storage container shown in FIG. 1 is housed in a shipping box. FIG. [Figure 10] FIG. 2 is a plan view of a main portion, showing a schematic diagram of a state in which a damage mark is formed in a protruding portion from an end of an inner layer film in the outermost layer. [Figure 11] 2 is a side view of a wound body used in the storage container shown in FIG. 1. [Figure 12] FIG. 1 is a perspective view of an experimental apparatus. [Figure 13] FIG. 1 shows the results of a transport experiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, a wrap film roll, a storage container containing a wrap film roll, a method for producing a storage container containing a wrap film roll, and a method for transporting the storage container to which the present invention is applied will be described with reference to the drawings.

[0024] [Storage container with rolled body] As shown in Figs. 1 and 2, the storage container includes a storage container 10 and a wrap film roll (hereinafter simply referred to as roll) 50R.

[0025] The storage container 10 has a rectangular parallelepiped shape extending in one direction. The storage container 10 is manufactured by folding and adhering an intermediate body made of a sheet of thick paper such as coated cardboard. The roll 50R includes a paper cylinder 50C that serves as a core material. The wrap film 50, which is an example of a long object, is wound around the cylinder 50C.

[0026] [Storage container] The storage container 10 comprises a container body 20 and a lid body 30. The container body 20 has a long and narrow box shape with an open top. The container body 20 includes 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 stand upright from the bottom plate 25 and form a single peripheral wall. Of these, the front plate 21, the rear plate 22, the bottom plate 25, and the opening are located on the side surfaces in the circumferential direction of the wound body. The right side plate 23 and the left side plate 24 are located on side surfaces facing each other in the left-right direction. Hereinafter, the right side plate 23 and the left side plate 24 are also referred to as the body side plates.

[0027] The materials of the container body 20 and the lid body 30 are not particularly limited, and may be, for example, plastic, metal, cardboard, or a laminated plate in which multiple pieces of cardboard are stacked, or may be made of a single sheet of cardboard. From the viewpoint of ease of use, cardboard such as coated cardboard is particularly preferable. The opening 20T of the container body 20 (see FIG. 2) is defined by the upper side of the peripheral wall. The roll 50R can be inserted and removed from the opening 20T.

[0028] The axial direction A of the roll 50R is substantially parallel to the extension direction of the storage container 10. The wrap film 50 is highly effective in preventing scratches on the outermost film edge if the wrap film is mainly composed of vinylidene chloride resin, but it may be, for example, a film made of any one of the group consisting of polyvinylidene chloride, polyvinyl chloride, polyethylene, and polymethylpentene, or a multilayer film made of a combination of these, but is not limited to these. In this embodiment, polyvinylidene chloride resin is used. The vinylidene chloride resin may be any resin containing vinylidene chloride units.

[0029] 1 and 2, the side of the opening 20T relative to the bottom plate 25 will be described as the upper side, and the side of the bottom plate 25 relative to the opening 20T will be described as the lower side. Additionally, the direction from the front plate 21 toward the rear plate 22 will be described as the rear, and the direction from the rear plate 22 toward the front plate 21 will be described as the front. The directions from the right side plate 23 toward the left side plate 24 and from the left side plate 24 toward the right side plate 23 will be described as the left-right direction. Additionally, the direction from the bottom plate 25 toward the opening 20T will be described as the upward direction, and the direction from the opening 20T toward the bottom plate 25 will be described as the downward direction, or height direction.

[0030] [Container body 20] The front plate 21, the rear plate 22, and the bottom plate 25 each have a rectangular plate shape extending in the left-right direction. 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. Moreover, the edge of the front plate 21 extending in the height direction is the front plate short side, and the edge of the rear plate 22 extending in the height direction is the rear plate short side.

[0031] The right side plate 23 and the left side plate 24 are rectangular and face each other in the left-right direction. The bottom side of the right side plate 23 is connected to the bottom side of the front plate 21, the bottom side of the rear plate 22, and the right side of the bottom plate 25. The bottom side of the left side plate 24 is also connected to the bottom side of the front plate 21, the bottom side of the rear plate 22, and the left side of the bottom plate 25.

[0032] The front plate 21 includes an auxiliary front plate 21A (see FIG. 3) and a main front plate 21B (see FIG. 3). The auxiliary front plate 21A forms the inner surface of the container body 20. The main front plate 21B forms the outer surface of the front plate 21. The auxiliary front plate 21A is connected to the main front plate 21B at an upper edge 21T of the main front plate 21B. The outer surface of the main front plate 21B is provided with a temporary fastening portion 21S for temporarily fastening the wrap film 50 (see FIG. 2).

[0033] The main front panel 21B is provided with a pair of front panel flaps 21F on the left and right. The front panel flap 21F is positioned closer to the upper side of the main front panel 21B than the center in the height direction of the main front panel 21B so as to sandwich the temporary fastening portion 21S in the left-right direction.

[0034] The front plate flap 21F is surrounded by a portion of the upper side 21T of the main front plate 21B (see FIG. 3) and a curved cutting line 21FC having both ends at the portion. The cutting line 21FC has a wavy shape that protrudes downward from the upper side 21T of the main front plate 21B. The front plate flap 21F is formed by cutting the main front plate 21B along the cutting line 21FC, and rotates forward around a portion of the upper side 21T of the main front plate 21B as a rotation axis. Since the front plate flap 21F rotates forward of the container body 20 and floats up, the cut end of the wrap film 50 that has been pulled out and cut from the opening 20T of the container body 20 floats up from the main front plate 21B below the front plate flap 21F.

[0035] The temporary fixing portion 21S includes a plurality of rectangular temporary fixing elements arranged in the left-right direction. The temporary fastening portion 21S is located closer to the upper side than the center in the height direction on the outer surface of the main front plate 21B, and includes the center in the left-right direction. The temporary fastening portion 21S is formed of UV varnish or the like applied to the main front plate 21B. The temporary fastening portion 21S temporarily fastens the wrap film 50, which is pulled out from the opening 20T of the container body 20 and hangs down from the upper side of the front plate 21, to the outer surface of the front plate 21.

[0036] The upper portion of the auxiliary front plate 21A is provided with restriction pieces 3R, 4R (see FIG. 2) extending in the front-rear direction. The restricting pieces 3R, 4R are located at both left and right ends of the upper edge of the auxiliary front plate 21A. The restricting pieces 3R, 4R are folded from the upper edge of the auxiliary front plate 21A along line LR (see FIG. 3). The restricting pieces 3R, 4R are disposed at both left and right ends of the cylindrical body 50C, and prevent the rolled body 50R from jumping out of the container body 20 by coming into contact with the cylindrical body 50C when the wrap film 50 is pulled out of the container body 20.

[0037] The right side plate 23 includes three flaps 13F, 23F, and 53F (see FIG. 3). The left side panel 24 includes three flaps 14F, 24F, and 54F (see FIG. 3). Each of the flaps 13F, 14F, 23F, and 24F constitutes an inner surface of the container body 20. Each of the flaps 53F and 54F constitutes an outer surface of the container body 20. Each of the flaps 23F and 24F is located inside the flap 13F and inside the flap 14F. The right side plate 23 and the left side plate 24 are examples of main body side plates.

[0038] The right side plate 23 is provided with a cover locking piece 3T (see FIG. 2) that extends in the front-rear direction. The left side plate 24 is provided with a cover locking piece 4T (see FIG. 2) that extends in the front-rear direction. The lid locking piece 3T is connected to an upper side 3E of a flap 53F (see FIG. 3) that constitutes the right side panel 23. The lid locking piece 3T is bent toward the outside (right side) of the container body 20 at the upper side 3E of the flap 53F and protrudes to the right side of the container body 20. The lid locking piece 3T extends in the front-rear direction.

[0039] The lid locking piece 4T is connected to an upper side 4E of a flap 54F (see FIG. 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 at the upper side 4E of the flap 54F and protrudes to the left side of the container body 20. The lid locking piece 4T extends in the front-rear direction.

[0040] [Cover 30] Returning to Fig. 1, the lid body 30 includes a top lid plate 31, a front lid plate 32, a lid body right side plate 33, and a lid body left side plate 34. The top lid plate 31 is rotatably connected to the upper side of the rear plate 22. The top lid plate 31 rotates relative to the container body 20 about the upper side of the rear plate 22 as an axis, and opens and closes the opening 20T of the container body 20. Hereinafter, the lid body right side plate 33 and the lid body left side plate 34 will also be referred to as lid body side plates.

[0041] The front cover plate 32 and the front plate 21 have substantially the same rectangular plate shape. The upper side of the front cover plate 32 is the front side of the upper cover plate 31. The front cover plate 32 covers the entire outer surface of the front plate 21 when the cover body 30 closes the opening 20T. The front cover plate 32 has a plurality of semicircular cutouts 32C below the middle in the height direction.

[0042] The inner surface of the cutout portion 32C is bonded to the outer surface of the front plate 21. The front cover plate 32 has a perforation line 32M at approximately the center in the height direction across the entire width in the left-right direction. The perforation line 32M has a generally V-shape with its apex pointing downward. The right end of the perforation line 32M is an opening end 32N for dividing the front cover plate 32 into upper and lower parts along the perforation line 32M.

[0043] When the opening end 32N is pulled forward, the front cover plate 32 is cut at the perforation line 32M. Also, the adhesion between the front plate 21 and the front cover plate 32 is peeled off at the cut portion 32C, and the entire width of the front cover plate 32 in the left-right direction is divided into a lower side and an upper side at the perforation line 32M.

[0044] The upper side of the front cover plate 32 defined by the perforation line 32M is the cover plate 32P. The lower side of the front cover plate 32 defined by the perforation line 32M is the cut-off piece 32K, which is cut off from the container body 20 when the wrap film 50 begins to be used. When the cut-off piece 32K is cut off from the cover body 30, the entire tip of the cutting blade 35 (see FIG. 2) is exposed from the lower end edge of the cover plate 32P. Then, the cover body 30 rotates on the upper edge of the rear plate 22, thereby opening the opening 20T of the container body 20.

[0045] The cover plate 32P has a plate shape extending downward from the front edge of the top cover plate 31 when the cover body 30 closes the opening 20T, and covers the upper outer surface of the front plate 21. The width of the cover plate 32P in the height direction is largest at the center in the left-right direction, except for both left-right ends, and the width in the height direction decreases as one moves from the center in the left-right direction to each end. When manufacturing the storage container 10, the cover plate 32P is folded relative to the top cover plate 31 at the line L (see FIG. 3).

[0046] A cutting blade 35 is joined to the inner surface of the cover plate 32P. The cutting blade 35 has a saw-like shape with cutting edges aligned in the left-right direction. The cutting blade 35 is joined to the cover plate 32P such that a plurality of cutting edges protrude downward from the cover plate 32P when the cover body 30 closes the opening 20T. The cutting blade 35 is joined to the cover plate 32P by ultrasonic bonding, for example, with a sealant material or adhesive layer interposed between the cover plate 32P and the cutting blade 35. Alternatively, a sealant layer may be laminated on the blade material resin layer constituting the cutting blade 35.

[0047] The material constituting the cutting blade 35 is not particularly limited and may be, for example, a resin or a metal. The cutting blade 35 contains, for example, a resin and an additive, and the rigidity of the cutting blade 35 and the adhesiveness of the cutting blade 35 to the cover plate 32P can be adjusted depending on the type and amount of the additive.

[0048] The resin constituting the cutting blade 35 is, for example, a polyester resin such as polylactic acid or polyethylene terephthalate, polyethylene, polypropylene, polystyrene, acetal resin, polyphenylene sulfide, PEEK (polyether ether ketone) resin, or PES (polyether sulfone) resin. The additive constituting the cutting blade 35 is, for example, a resin such as an olefin resin, or an inorganic material such as barium sulfate, calcium carbonate, titanium oxide, silica, or talc. The resin constituting the sealant layer is, for example, a modified polyolefin in which a functional group is introduced into polyolefin to impart adhesiveness.

[0049] The lid right side plate 33 includes a lid right side plate 33F and a joint piece 323 (see FIG. 2). The lid left side plate 34 includes a lid left side plate 34F and a joint piece 324 (see FIG. 2). The lid right side plate 33F is connected to the top lid plate 31 at a short side which is the intersection line between the top lid plate 31 and the lid right side plate 33F. The lid left side plate 34F is connected to the top lid plate 31 at a short side which is the intersection line between the top lid plate 31 and the lid left side plate 34F.

[0050] In the lid right side plate 33 and the lid left side plate 34, the lid side plates 33F, 34F form the outer surface of the lid 30, and the joining pieces 323, 324 form the inner surface of the lid 30. The lid right side plate 33 and the lid 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 when the lid 30 closes the opening 20T.

[0051] The joint piece 323 is positioned with a gap between the short side of the intersection of the top cover plate 31 and the cover right side plate 33F and the joint piece 323. The joint piece 324 is also positioned with a gap between the short side of the intersection of the top cover plate 31 and the cover left side plate 34F and the joint piece 324. As a result, the joint pieces 323, 324 are positioned with a gap between them and the top cover plate 31, and form steps 33S, 34S on the inner surfaces of the cover right side plate 33 and the cover left side plate 34. When the cover 30 closes the opening 20T, the above-mentioned cover locking pieces 3T, 4T fit into the steps 33S, 34S and engage with the steps 33S, 34S, generating a clicking sound. The cover locking pieces 3T, 4T prevent the top cover plate 31 from floating up in the closed state through engagement with the steps 33S, 34S.

[0052] [Assembly of storage container containing roll] 3, the auxiliary front plate 21A is first folded along the line that is the boundary between the main front plate 21B and the auxiliary front plate 21A so that it is located inside the container body 20 relative to the main front plate 21B, and is attached to the inside of the main front plate 21B. Next, the line L that is the boundary between the bottom plate 25 and the rear plate 22 and the line L that is the boundary between the top cover plate 31 and the front cover plate 32 are folded so that the front cover plate 32 overlaps the main front plate 21B. Next, the lower part of the main front plate 21B and the cutout piece 32K are adhered so that they can be peeled off when in use.

[0053] Next, the crease L which is the boundary between the main front plate 21B and the bottom plate 25, and the crease L which is the boundary between the rear plate 22 and the top cover plate 31 are folded to form a rectangular cylinder. Then, either the left or right main body side plate (right side plate 23: 23F, 13F, 53F, left side plate 24: 24F, 14F, 54F) and the cover side plate (cover right side plate 33: 323, 33F, cover left side plate 34: 324, 34F) are folded in the order shown in parentheses to form one of the main body side plate and cover side plate. That is, one side of the storage container 10 is closed. Next, the wrap film roll 50R is inserted from the open side. Next, the body side plate on the inserted side is formed, and the lid side plates of the lid 30 (the lid right side plate 33: 323, 33F and the lid left side plate 34: 324, 34F) are folded and then glued together to form the lid side plates. This closes both sides of the storage container 10.

[0054] In the example of FIG. 4, first, a main body left side plate made up of left side plate 24 is formed, and a lid left side plate made up of lid left side plate 34 is also formed. Specifically, starting from the inside, first, the flap 24F is folded relative to the rear plate 22 along the crease LT (see FIG. 3). Next, the flap 14F is folded relative to the front plate 21 along the crease LT. Next, the flap 54F is folded relative to the bottom plate 25 along the crease LT (see FIG. 3). Next, the flaps 24F, 14F and 54F are bonded together with a glue such as hot melt. Finally, the lid locking piece 4T is folded toward the outside of the container body 20 at the upper edge of the flap 54F.

[0055] Also, the joint piece 324 is folded relative to the cover plate 32P at the crease LT (see FIG. 3), and then the left cover plate 34F is folded relative to the top cover plate 31 at the crease LT (see FIG. 3). Finally, the left cover plate 34F and the joint piece 324 are bonded together with a glue such as hot melt. As a result, the cover left plate 34 covers the upper part of the outer surface of the left side plate 24 with the cover 30 closing the opening 20T. This causes the left side of the storage container 10 to be closed.

[0056] Next, the roll 50R is inserted into the storage container 10 from the open right side surface, with the left end, which is one end of the cylindrical body 50C, serving as the insertion end. Usually, in the roll 50R, the film end of the outermost wrap film 50 on the insertion end side is inserted while rubbing against the inner surface of the storage container 10.

[0057] Next, the right side plate of the main body composed of the right side plate 23 is formed, and the right side plate of the lid composed of the right side plate of the lid 33 is formed. Specifically, starting from the inside, the flap 23F is folded relative to the rear plate 22 along the crease LT (see FIG. 3). Next, the flap 13F is folded relative to the front plate 21 along the crease LT. Next, the flap 53F is folded relative to the bottom plate 25 along the crease LT (see FIG. 3). Next, the flaps 23F, 13F and 53F are bonded together with a glue such as hot melt. Finally, the lid locking piece 3T is folded toward the outside of the container body 20 at the upper edge of the flap 53F.

[0058] Also, the joint piece 323 is folded along the crease LT (see FIG. 3) relative to the cover plate 32P. Next, the cover right side plate 33F is folded along the crease LT (see FIG. 3) relative to the top cover plate 31. Finally, the cover right side plate 33F and the joint piece 323 are bonded together with a glue such as hot melt. This causes the right side of the storage container 10 to be closed as well.

[0059] [Rolled body] The wrap film 50 is wrapped around the cylindrical body 50C. The length of the cylindrical body 50C in the axial direction A is longer than the length of the wrap 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 wrapped wrap film 50.

[0060] As shown in Figure 5, at the right end face 52 of the two opposing end faces in the axial direction A of an unused roll 50R, the outermost layer film end 61E of the wrap film 50 constituting the outermost layer 61 protrudes outward from the central inner layer film end 63E of the layer 63, which is located most centrally in the axial direction A, among the layers 62 located inside the outermost layer 61.

[0061] Here, the end surface refers to the end of the wrap film in the left-right direction (width direction) that forms a layer when the wrap film constituting the roll 50R is wrapped around the tubular body 50C in the circumferential direction. The collection of layers at the end of the wrap film is called the end surface. The film end refers to the end of the wrap film in the axial direction A of the wrap film constituting the roll 50R. The outermost layer film end 61E refers to the film end in the axial direction A of the wrap film that is the outermost layer (outermost circumference) of the roll 50R. The central inner layer film end 63E refers to the film end of the wrap film that constitutes the layer whose film end is located most central in the axial direction A among the layers inside the outermost layer. The outside refers to the end direction of the tubular body 50C in the axial direction A.

[0062] In the outermost layer 61, a portion 64 protruding outward from the central inner layer film end 63E is in a folded state or is bendable inward of the right end face 52. The inward direction of the right end face 52 refers to the direction approaching the cylindrical body 50C, and the bendable state or folded state refers to a state in which the portion 64 protruding outward from the central inner layer film end 63E can cover the right end face 52 or is covering the right end face 52. Note that if the protruding amount X described below is greater than 0 mm, it is included in the bendable state or folded state.

[0063] As an example, the amount of protrusion X from the central 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 tube 50C. In other words, the amount of protrusion X of the outermost film end 61E from the central inner layer film end 63E is the length located between the right end face 52 and the end 53 of the tube 50C. The amount of protrusion X is the distance from the central inner layer film end 63E to the film end that protrudes most outward. In the case of FIG. 5, the amount of protrusion X is the distance from the central inner layer film end 63E to the outermost film end 61E. In the case of FIG. 6 described later, the amount of protrusion X is the distance from the central inner layer film end 63E to the film end 66E of the third layer 66 that protrudes most outward. In the case of FIG. 7, the amount of protrusion X is also the distance from the central inner layer film end 63E to the outermost film end 61E. In either case, the outermost film end 61E must protrude greater than 0 mm.

[0064] The protrusion amount X depends on the protrusion thickness, which is the thickness of the film end protruding outward from the center inner layer film end 63E, but is preferably 0.5 mm to 2.5 mm, more preferably 0.5 mm to 2.0 mm. If the protrusion amount X is 0.5 mm to 2.5 mm, the outermost film end bends inward toward the end face, making it difficult for the outermost film end 61E to come into contact with the inner surface of the container and to be scratched. If the protrusion amount X is 0.5 mm to 2.0 mm, the appearance of the roll 50R is improved, and this is even more preferable. More preferably, the protrusion amount X is 0.5 mm to less than 1.5 mm.

[0065] In the outermost layer 61, the portion 64 protruding outward from the center-side inner layer film end 63E is in a state in which it can be bent inward of the right end face 52 or is in a folded state, so that the outwardly protruding portion 64 covers the right end face 52. When the outwardly protruding portion 64 covers the right end face 52, the right end face 52 is covered by the outwardly protruding portion 64, so that it is possible to prevent the right end face 52 from being scratched. In addition, the outwardly protruding portion 64 of the outermost layer film end 61E is bent inward of the right end face 52, so that it is possible to prevent the outermost layer film end 61E from contacting the inner surface of the storage container, so that the outermost layer film end 61E is less likely to be scratched.

[0066] Incidentally, since the wrap film has elastic properties by its nature, when the protruding portion 64 is formed, the wrap film tends to naturally bend toward the inside of the end face when the roll 50R is wound up. Methods for making the outermost film end 61E protrude outward from the central inner film end 63E include loosening the tension applied to the wrap film in the winding direction and shifting it in one direction in the axial direction A. In this embodiment, the method of shifting it to the right in the axial direction A is used. In the method of shifting it in one direction in the axial direction A, one end face has a film end that protrudes 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 formed by the film end located on the central side has a gentle curve. By making the corner of the other end face have a gentle curve, the stress of the end face corner where stress is most likely to concentrate when it comes into contact with the inner wall of the container is dispersed, making it difficult for the surface film end to be scratched. In addition, by loosening the tension applied to the wrap film in the winding direction, it is possible to form parts that protrude outward from the central inner film end 63E on both the right and left end faces in the axial direction A. Since the outermost film end 61E at both end faces protrudes outward beyond the central inner film end 63E, both outermost film ends 61E are less likely to be damaged.

[0067] 5 to 7, the right end of wound body 50R is shown. In Fig. 5, the outermost layer film end 61E protrudes outwardly from the center-side inner layer film end 63E in the axial direction A. In other words, the outermost layer film end 61E protrudes outwardly from the film end of the layer 62 that is more inward than the outermost layer 61. When the outermost layer film end 61E protrudes outwardly from the center-side inner layer film end 63E in the axial direction A, damage to the outermost layer film end 61E can be more effectively prevented. The film end on the right end surface 52 side may also be configured as shown in Figs. 6 and 7.

[0068] In the example of FIG. 6, the outermost layer film end 61E protrudes outward from the central inner layer film end 63E of the layer 63 (the fifth and subsequent layers) whose film end is located at the most central side in the axial direction A. The film end 65E of the second layer 65 protrudes further from the outermost layer film end 61E. Furthermore, the film end 66E of the third layer 66 protrudes further from the film end 65E of the second layer 65. That is, the film end 66E of the third layer 66 protrudes the furthest outward. The film end 67E of the fourth layer 67 protrudes the same amount as the outermost layer film end 61E, but does not protrude as much as the film end 66E. In the example of FIG. 7, the second layer 65 and the third layer 66 protrude more than the outermost layer 61, and the film ends 65E, 66E protrude more than the outermost layer film end 61E. In the example of Fig. 6, the film end from the fifth layer onwards is the layer 63 located at the most central side in the axial direction A, whereas the outermost layer to the fourth layer 61, 65, 66, 67 have an eaves-like shape. Note that in Fig. 6, the outermost layer to the fourth layer have an eaves-like shape, but the protrusion amount from the outermost layer to the inner layers may be the same. By providing a portion protruding outward from the central inner layer film end 63E in the multiple layers, the elasticity of the portion when folded can absorb the impact when rubbing against the inner surface of the storage container 10, thereby further suppressing the occurrence of scratches.

[0069] In the example of Fig. 7, the outermost layer film end 61E protrudes to the outermost side. Although the protrusion amount is smaller than that of the outermost layer film end 61E, the film end 65E of the second layer 65 and the film end 66E of the third layer 66 protrude from the central inner layer film end 63E of the layer 63 (multiple layers from the fourth layer) located at the most central side in the axial direction A. Here, the protrusion amount of the film end 65E of the second layer 65 is larger than that of the film end 66E of the third layer 66. Furthermore, the film end 68E of the first lower layer 68, which is a plurality of layers below the layer 63 located at the most central side in the axial direction A, and the film end 69E of the second lower layer 69 below it also protrude from the central inner layer film end 63E. The protrusion amount of the film end 69E of the second lower layer 69 is larger than that of the film end 68E of the first lower layer 68. In the example of Figure 7, layers protruding from layer 63, whose film end is located most centrally in the axial direction A, are provided above and below layer 63, and the central inner layer film end 63E of layer 63 is configured to be located in the valley portion.

[0070] As shown in Fig. 8, in the above-described roll 50R, the portion 64 of the outermost layer 61 that protrudes outward from the central inner layer film end 63E, including the outermost layer film end 61E, is bent toward the cylinder 50C, which is the inward direction of the right end face 52. When the roll 50R is inserted into the storage container 10 with the protruding portion 64 bent, the outermost layer film end 61E is less likely to come into contact with the inner surface of the storage container 10, and damage to the outermost layer film end 61E can be suppressed. In addition, since the protruding portion 64 covers the right end face 52, damage to the inner layer film, including the film end, can be suppressed. Although not shown, the protruding portions, including the film ends 65E, 66E, 67E that protrude beyond the central inner layer film end 63E, are also bent toward the cylinder 50C, as shown in Figs. 6 and 7.

[0071] However, in FIG. 7, film ends 68E and 69E, which are layers located more inward than the central inner layer film end 63E, do not bend even though they protrude outward from the central inner layer film end 63E, and therefore do not contribute to preventing scratches on the film ends.

[0072] [How to transport the container] As shown in FIG. 9, the storage container 10 containing the roll 50R is transported in an upright state in a transport box 70 having a rectangular parallelepiped shape such as a cardboard box. The storage containers 10 are arranged and stored in the transport box 70 so that the adjacent storage containers 10 are in close contact with each other. Therefore, the storage containers 10 hardly rattle in the transport box 70. However, the roll 50R stored in each storage container 10 rattles in each storage container 10 because there is a slight gap between the storage container 10 and the roll 50R. Therefore, the wrap film 50 of the outermost layer 61 of the roll 50R in the storage container 10 repeatedly comes into contact with the inner surface of the storage container 10 due to vibration during transportation. The part protruding outward from the center inner layer film end 63E is bent toward the cylindrical body 50C to form a bent portion 71.

[0073] The bent portion 71 is formed in a portion that protrudes outward beyond the central inner layer film end 63E. As a result, due to vibration or the like, the portion that comes into closest contact with the inner surface of the storage container 10 is not the outermost film end 61E, but a position slightly closer to the center in the axial direction A than the outermost film end 61E, and damage marks 72 such as scratches and abrasions are formed at this position.

[0074] 10 is a plan view showing a state in which the roll 50R is removed from an unused storage container 10 and the outermost layer 61 is rolled up. In the outermost layer 61, a damage mark 72 is formed at a position slightly closer to the center in the axial direction A than the outermost layer film end 61E.

[0075] When the wrap film 50 is picked out from the storage container 10, it is cut by the cutting blade 35 of the storage container 10. When cutting, the wrap film 50 may be cut in a direction unintended by the user, resulting in cutting problems. The main cause of cutting problems is damage marks formed on the film edge. In this regard, the wrap film 50 has a folded portion 71, so that damage marks 72 are formed at a position slightly closer to the center in the axial direction A than the outermost film edge 61E, and damage marks 72 are not formed on the outermost film edge 61E. This makes it possible to prevent cutting problems from occurring.

[0076] The roll 50R in the storage container 10 tends to have more scratches on the outermost layer 61 at the upper end than at the lower end due to vibration during transportation. This is because the upper side of the roll 50R shakes more than the lower side inside the storage container 10. Therefore, the storage container 10 is stored and transported in a transport box 70 so that the end of the roll 50R where the bent portion 71 is formed is on the upper side. This makes it difficult for damage marks 72 to form on the outermost layer film end 61E.

[0077] The amount of protrusion X from the central inner layer film end 63E preferably protrudes more than 0 mm and is a length that positions the film ends 61E, 65E, 66E, 67E at positions that do not extend beyond the end 53 of the cylindrical body 50C. In other words, the amount of protrusion X of the film ends 61E, 65E, 66E, 67E is preferably a length that positions these film ends 61E, 65E, 66E, 67E between the end face of the roll 50R and the end 53 of the cylindrical body 50C.

[0078] If the film ends 61E, 65E, 66E, 67E protrude even slightly from the central inner layer film end 63E, a folded portion 71 will be formed in the portion 64 protruding beyond the central inner layer film end 63E. As a result, the damage mark 72 will be formed in the outermost layer 61 at a position slightly closer to the center in the axial direction A than the outermost layer film end 61E. On the other hand, if the film ends 61E, 65E, 66E, 67E protrude so far from the end 53 of the cylindrical body 50C, the portion will be pinched between the end 53 of the cylindrical body 50C and the inner surface of the storage container 10, and may be damaged.

[0079] 11, the film ends 61E, 65E, 66E, 67E protruding beyond the central inner layer film end 63E preferably satisfy (1) Y≦1.25X and (2) X>0, where T1 is the total thickness from the innermost film end 75E of the innermost layer 75 in contact with the outer peripheral surface of the cylindrical body 50C to the outermost film end 61E, and Y is the thickness of the film end protruding outward beyond the central inner layer film end. Here, the maximum value of X is the distance from the central inner layer film end 63E to the end 53 of the cylindrical body 50C. X and Y can be selected as appropriate as long as they are within a range that satisfies the above relational expressions (1) and (2). If the film ends 61E, 65E, 66E, 67E are located within this range, the layers 61, 65, 66, 67 including the film ends 61E, 65E, 66E, 67E can be bent toward the cylinder 50C to the extent that a bent portion 71 is formed. The elasticity of the bent portion can soften the impact when rubbing against the inner surface of the storage container 10. Therefore, the bent portion 71 is formed in the portion 64 of the outermost layer 61 that protrudes beyond the central inner layer film end 63E, and damage marks 72 are less likely to be formed on the outermost layer film end 61E.

[0080] [Example] <Experiment 1> In experiment 1, an experiment was conducted to reproduce the situation when storing the roll 50R in the storage container 10, and the occurrence of damage marks 72 in the portion 64 protruding from the central inner layer film end 63E in the outermost layer 61 of the roll 50R was examined. Experiment 1 was a test conducted under the assumption that the film end is easily scratched.

[0081] As shown in FIG. 12, the experimental device 80 includes an olefin resin mat 81 (product name: KOKUYO Cutting Mat, product number MA-44N) and a base 82 to be placed on the mat 81. The roll 50R was placed on the mat 81 at an angle using the base 82. Specifically, the center of the roll 50R (product name "New Crewrap": manufactured by Kureha Corporation) with a length of 30 cm x 50 m was placed on the base 82 with a height of 10 mm. After that, the roll 50R was manually moved at a speed of 30 mm / sec for 5 seconds, and the portion 64 of the outermost layer 61 protruding from the inner layer film end 63E on the center side was pressed against the mat 81. After that, the state of damage generation at the film end of the outermost layer 61 was observed.

[0082] In experiment 1, 150 mm was pushed at a speed of 30 mm / sec for 5 seconds, which is assumed to be the insertion speed of the rolled body 50R during production. When the rolled body 50R was pushed, the rolled body 50R was under its own weight (approximately 400 g). The end face shape of the rolled body 50R with a result of ◯ was close to that shown in Figure 7. The results are shown in Table 1. The evaluation criteria were ◯: no curling or cuts at the end of the outermost film, and ×: curling (causing cuts) or cuts at the end of the outermost film.

[0083] [Table 1] The amount of protrusion is the amount of protrusion X of the outermost film end 61E from the central inner layer film end 63E, as shown in Fig. 5. A plus sign indicates that the outermost film end 61E protrudes outward relative to the central inner layer film end 63E, and a minus sign indicates that the outermost film end 61E is located inside (toward the center in the axial direction A) relative to the central inner layer film end 63E. A zero sign indicates that the outermost film end 61E is in the same position in the axial direction A as the central inner layer film end 63E.

[0084] When the protrusion amount was negative or zero, a curl that became a damage mark 72 was formed at the outermost film end 61E (No. 1, No. 2, No. 3). In contrast, if the protrusion amount is even slightly positive, damage marks 72 such as curling or scratches are not formed on the outermost layer film end 61E. In other words, damage marks 72 are not formed on the outermost layer film end 61E, but are formed at a position slightly closer to the center in the axial direction A than the outermost layer film end 61E.

[0085] In addition, the rolls 50R of No. 1 to No. 22 were stored in a storage container 10 made of coated cardboard, the wrap film 50 was pulled out of the storage container 10, and cut with the cutting blade 35 provided in the storage container 10 to check for the occurrence of cutting problems. As a result, no cutting problems occurred in No. 4 to No. 22. On the other hand, in No. 1 to No. 3, a scratch caused by the curling of the film edge was the starting point, and the wrap film 50 was torn in an unintended direction, causing cutting problems.

[0086] <Experiment 2> For a 30 cm x 50 m roll 50R (product name "New Crewrap": manufactured by Kureha Corporation), the outermost film end 61E was pressed against the mat 81 in the same manner as in Experiment 1. After this, the state of scratches on the end surface was observed. The protrusion amount in this case was 2 mm. The end surface shape of the roll 50R with the result of ◯ is close to the shape in FIG. 6.

[0087] Here, the protruding thickness of the portion with a protruding 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 includes the thickness of the outermost layer film end 61E and the film end protruding outward beyond the central inner layer film end 63E (see FIG. 11). The results are shown in Table 2. The evaluation criteria were the same as in Experiment 1.

[0088] [Table 2] When the protrusion amount is 2 mm, so long as the protrusion thickness satisfies the above relationship between (1) and (2), damage marks 72 such as curling or scratches are not formed on the outermost film end 61E, and damage marks 72 are formed at a position slightly closer to the center in the axial direction A than the outermost film end 61E.

[0089] When the protruding thickness was 0.05 mm (No. 31), damage marks 72 were not formed at the outermost film end 61E, but were formed slightly closer to the center in the axial direction A than the outermost film end 61E. When the protruding thickness was 3.0 mm (No. 39), curling was confirmed at the outermost film end 61E. The reason that curling was confirmed at the outermost film end 61E when the protruding thickness was 3.0 mm is thought to be that the number of layers with protruding parts compared to the central inner layer film end 63E was increased and the film was thicker, which reduced the degree of bending of the end face of the folded part 71 in the outermost layer 61, and caused the outermost film end 61E to come into contact with the installation surface.

[0090] Moreover, Table 3 shows the results when the protrusion amount was 1 mm.

[0091] [Table 3] When the protrusion amount is 1 mm, it can be confirmed that damage marks 72 such as curling or scratches are not formed on the outermost film end 61E until the protrusion thickness is 1.25 mm. That is, it can be confirmed that the damage marks 72 are formed at a position slightly closer to the center in the axial direction A than the outermost film end 61E. The reason why curling is confirmed on the outermost film end 61E when the protrusion thickness is 1.5 mm is considered to be that the number of layers with a protruding portion from the central inner layer film end 63E increases and the thickness becomes thicker, making it difficult to bend, and the degree of bending of the end face of the bent portion 71 in the outermost layer 61 becomes smaller, and the outermost film end 61E comes into contact with the installation surface. Also, the degree of bending is smaller in the case of 1 mm than in the case of 2 mm, so that the bent portion 71 is difficult to bend. For this reason, in the case of 1 mm, curling is confirmed on the outermost film end 61E from 1.5 mm, not from 3.0 mm as in the case of 2 mm. Therefore, the protrusion amount and the protrusion thickness should be set so as to satisfy the above relational expressions (1) and (2).

[0092] The rolls 50R of No. 31 to No. 47 were stored in a storage container 10 made of coated cardboard, the wrap film 50 was pulled out of the storage container 10, and cut with the cutting blade 35 provided on the storage container 10 to check for the occurrence of cutting problems. As a result, no cutting problems occurred except for No. 39 and No. 47. On the other hand, for No. 39 and No. 47, scratches caused by the curling of the film edge were the starting point, and the wrap film 50 was torn in an unintended direction, resulting in cutting problems.

[0093] <Experiment 3> The storage container 10 is transported in an upright state in a transport box 70 and is subjected to vibration in this state. Therefore, in Experiment 3, a transport experiment was conducted to reproduce the vibration during transport, and damage marks 72 formed on the outermost film end 61E at the upper and lower ends of the roll 50R were confirmed.

[0094] Specifically, a 30 cm x 50 m rolled roll 50R (product name "New Crewrap": manufactured by Kureha Corporation) was stored in a storage container 10. The storage container 10 was a rectangular parallelepiped container made from a single sheet of coated cardboard. The sample rolls 50R were a roll 50R (control product) in which the outermost film end 61E and the innermost film end 75E were located at the same position in the axial direction A, a roll 50R with a protruding amount of 1 mm, and a roll 50R with a protruding amount of 2 mm. The rolls 50R with protruding amounts of 1 mm and 2 mm had a film end protruding from one of both end faces in the axial direction of the roll 50R. The roll was inserted into the storage container 10 from the side having the end face from which the film end, including the outermost film end, protruded, to prepare a storage container containing the roll. Thirty of these storage containers containing the rolls were placed in a cardboard box (inner dimensions: 23 cm x 28 cm x 32 cm) with the end surface with the protruding film end facing up so that no gaps were formed, and the rolls were arranged so that the axial direction A of the rolls was perpendicular to the transportation test device, and vibration was applied using the transportation test device ("Transportation Packaging Tester BF-50FT" manufactured by IDEXX). In experiment 3, movements with different vibration directions were performed for 5 minutes x 4 patterns (a total of 20 minutes equivalent to traveling 1000 km). Then, the presence or absence of damage marks 72 on the upper end (upper side) of the outermost film end 61E was confirmed. Note that the damage marks 72 were scratches that occurred within 0.2 mm inward from the film end. Scratches that occurred 0.3 mm or more toward the center of the axial direction A were excluded.

[0095] The result is shown in Fig. 13. In Fig. 13, the "insertion side" refers to the side that is first inserted into the storage container 10 when the wound body 50R is inserted into the storage container 10. The insertion side is located on the upper side during transportation.

[0096] Looking at the results for the control product, it can be seen that damage marks 72 were formed on the insertion side of outermost layer 61 of wound body 50R due to vibration during transportation. It can also be seen that for both the wound body 50R with a protrusion amount of 1 mm and the wound body 50R with a protrusion amount of 2 mm, no damage mark 72 is formed on the outermost film end 61E on the insertion side, or the damage mark 72 is extremely small.

[0097] <Effects of the embodiment> The storage container 10 as described above can provide the following effects. (1) The portion of the outermost layer 61 that protrudes outward from the central inner layer film end 63E is bent inwardly of the end face 52, thereby preventing damage marks 72 from being formed on the outermost layer film end 61E due to rubbing against the inner surface of the storage container 10. The damage marks 72 are not formed on the outermost layer film end 61E, but slightly closer to the center in the axial direction A. This makes it possible to prevent cutting problems caused by damage to the outermost layer film end 61E.

[0098] (2) Because the outermost film end 61E protrudes outwardly from the central inner film end 63E, the formation of damage marks 72 on the outermost film end 61E due to friction with the inner surface of the storage container 10, etc., can be more effectively prevented.

[0099] (3) When the protrusion amount to the film end that protrudes most outward is X (mm), the direction from the outermost film end 61E to the innermost film end 75E is the thickness direction, and the thickness of the film end that protrudes outward beyond the central inner layer film end is Y (mm), film ends 61E, 65E, 66E, 67E are positioned so as to satisfy the relationship expressions (1) Y≦1.25X and (2) x>0. If film ends 61E, 65E, 66E, 67E are positioned within this range, folded portion 71 can be formed in the outermost layer 61 including outermost film end 61E.

[0100] (4) The film ends 61E, 65E, 66E, 67E that protrude outward beyond the central inner layer film end 63E protrude more than 0 mm from the central inner layer film end 63E. Therefore, the portions protruding beyond the central inner layer film end 63E can be folded toward the tube 50C so as to cover the end face, and a folded portion 71 is formed in the portion 64 of the outermost layer 61 that protrudes beyond the central inner layer film end 63E. This prevents damage marks 72 from being formed on the outermost layer film end 61E.

[0101] (5) Furthermore, film ends 61E, 65E, 66E, 67E that protrude outward beyond center inner layer film end 63E are positioned so as not to extend beyond end 53 of cylindrical body 50C. This prevents film ends 61E, 65E, 66E, 67E from being pinched between end 53 of cylindrical body 50C and the inner surface of storage container 10 and being damaged.

[0102] (6) For wrap film 50 containing vinylidene chloride resin as a main component, the formation of damage marks 72 on outermost film end 61E can be suppressed. (7) It is possible to prevent the formation of damage marks 72 on the outermost film end 61E due to rubbing against the inner surface of the storage container 10 caused by vibrations or the like applied until the start of use.

[0103] (8) In the process of storing the roll 50R in the storage container 10 and manufacturing the storage container containing the roll, the formation of damage marks 72 on the outermost film end 61E due to rubbing against the inner surface of the storage container 10 or the like can be suppressed.

[0104] (9) The storage container 10 is transported in an upright position in a transport box 70. The roll 50R in the storage container 10 is more likely to have damage marks 72 formed on the upper side of the outermost film end 61E than on the lower side due to vibrations during transport. In this regard, the storage container 10 is transported with the side having the folded portion 71 of the outermost layer 61 facing up. This makes it possible to prevent damage marks 72 from being formed on the upper outermost film end 61E due to rubbing against the inner surface of the storage container 10, for example.

[0105] The storage container 10 can be further modified as follows. The outermost layer film end 61E protruding beyond the central inner layer film end 63E may be provided not only on the right end surface 52 but also on the left end surface. When providing the outermost layer film ends 61E protruding beyond the central inner layer film end 63E on both left and right end surfaces, it is preferable to wind the wrap film 50 around the cylindrical body 50C in a manner that relaxes the tension applied to the wrap film 50 in the winding direction. By providing the outermost layer film ends 61E protruding beyond the central inner layer film end 63E on both left and right end surfaces, the occurrence of damage marks 72 can be suppressed on both left and right ends of the rolled body 50R.

[0106] By forming the outermost layer film ends 61E protruding beyond the center inner layer film end 63E at both the left and right ends of the roll 50R, the roll 50R can be stored in the storage container 10 without managing the left and right ends. The storage container 10 can be stored in the shipping box 70 without managing the top and bottom. Furthermore, damage marks 72 can be prevented from being formed on the outermost layer film ends 61E at both the top and bottom ends of the roll 50R during transportation.

[0107] The storage container 10 may be stored in the transport box 70 in a lying position instead of being stored upright. The outermost layer film end 61E protruding from the central inner layer film end 63E may be provided by a method other than the easy method of relaxing the tension applied to the wrap film 50 in the winding direction or shifting in one direction in the axial direction. For example, the portion that constitutes the outermost layer 61 may be trimmed to increase the width of the wrap film 50 in the axial direction A.

[0108] The radial thickness of the film end protruding outward beyond the central inner layer film end 63E is not particularly limited as long as it is thick enough to form a folded portion 71 at the outermost layer film end 61E.

[0109] The film ends 61E, 65E, 66E, 67E protruding outward beyond the central inner layer film end 63E may be longer than the end 53 of the cylindrical body 50C, so long as the film ends 61E, 65E, 66E, 67E are configured such that they are less likely to be pinched between the end 53 and the inner surface of the storage container 10.

[0110] The outermost film end 61E protruding outward from the central inner layer film end 63E may protrude at least partially in the circumferential direction. In this case, the outermost film end 61E preferably protrudes outward over at least half the circumference, more preferably over the entire circumference. When inserting the roll 50R into the storage container 10, it is sufficient to insert the roll 50R so that the protruding portion comes into contact with the inner surface of the storage container 10. As an example, the outermost film end 61E protruding outward from the central inner layer film end 63E may protrude at least partially in the circumferential direction, and in the second layer or layers after the second layer, the inner layer film end may protrude beyond the central inner layer film end 63E over the entire circumference. [Explanation of symbols]

[0111] 10…Storage container 20…Container body 20T…Aperture 30…Lid body 35…Cutting blade 50…Wrapping film 50C...Cylinder 50R…wrap film roll 52...Right end surface 53...edge 61…Outermost layer 61E…Outermost film edge 63E…Center side inner layer film end 64...Protruding part 65,66,67…layer 65E, 66E, 67E…Film edge 70…Transportation box 71...Bending part 72…Damage marks 75…Innermost layer 75E…Innermost film edge

Claims

1. A wrap film roll in which a wrap film is wound, At both ends of the wrap film roll facing each other in the axial direction, the wrap film forming the next outer layer is directly wound around the wrap film forming the inner layer of the wrap film roll, at least a portion of an outermost layer film end of the wrap film constituting the outermost layer only on one of the two end faces facing each other in the axial direction of the unused wrap film roll protrudes outward from a central inner layer film end of a layer located most centrally in the axial direction among layers located inside the outermost layer, In the wrap film constituting the outermost layer, a portion protruding outward from the end of the central inner layer film is in a state in which it can be folded inward toward the one end face, or is in a folded state. Wrap film roll.

2. The outermost layer film end protrudes most outwardly from the center side inner layer film end in the axial direction. The wrap film roll according to claim 1.

3. When the protruding distance to the outermost film end among the film ends protruding outward from the central inner layer film end, including the outermost layer film end, is defined as X (mm), and the thickness of the film end protruding outward from the central inner layer film end is defined as Y (mm), the following relationship formulas (1) and (2) are satisfied: The wrap film roll according to claim 1 or 2. (1) Y≦1.25X (2) X>0

4. The film ends that protrude outward beyond the center-side inner layer film end, including the outermost film end, protrude from the center-side inner layer film end by more than 0 mm and are located at positions that do not exceed the end of the core material. A wrap film roll according to any one of claims 1 to 3.

5. The main component of the wrap film is vinylidene chloride resin. A wrap film roll according to any one of claims 1 to 4.

6. A wrap film roll according to any one of claims 1 to 5, and a container body that houses the wrap film roll. Storage container.

7. A method for producing a storage container containing a wrap film roll according to any one of claims 1 to 5, The container body for accommodating the wrap film roll is An opening is provided on one of a plurality of side surfaces in the circumferential direction of the wrap film roll, allowing the wrap film roll to be inserted and removed, and a pair of side plates are provided to close the side surfaces facing each other in the axial direction, The lid body rotatably provided on the container body includes an upper lid plate that opens and closes the opening, and a pair of lid side plates connected to short sides of the upper lid plate, With the top cover plate closing the opening, one side surface of the container body being closed by one side plate and one lid side plate, and the other side surface being open by the other side plate and the other lid side plate, the wrap film roll is inserted into the container body through the opening on the other side surface, with the end surface of the outermost film protruding outward beyond the central inner film end serving as the insertion end, Next, the other side surface is closed with the other side plate and the other cover side plate. A method for manufacturing a storage container containing a wrap film roll.

8. A method for transporting a storage container according to claim 6, comprising the steps of: The container is transported with the end face of the wrap film roll on the side where the outermost layer film end protrudes outward beyond the center side inner layer film end facing up. Transportation method.

Images