JP2020050462A - Winding core - Google Patents

Abstract

To provide a winding core for winding a sheet-like article, capable of preventing the wound sheet-like article from being shifted to an end part.SOLUTION: A winding core 10 is constituted so as to include a cylindrical barrel part 11 capable of winding a sheet-like article 20 on an outer periphery, and a flange part 12 connected to an end part of the barrel part 11 to prevent the sheet-like article 20 wound on an outer periphery of the barrel part 11 from being shifted in a direction of the connected end part part. The sheet-like article 20 is prevented from being shifted and projected from an end part of the winding core 10 during transportation to form bruises.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a winding core, a sheet-shaped article storage body using the winding core, a sheet-shaped article storage body package containing a plurality of the sheet-shaped article storage bodies, and a method of manufacturing a winding core. .

A sheet-like article storage body in which a sheet-like article such as an aluminum foil is wound around a cylindrical core such as a paper tube as disclosed in Patent Documents 1 and 2, and the core is stored in a storage case is commercially available. ing.
When using a sheet-like article, when the end of the winding appearing on the outer periphery of the rolled-up sheet-like article is grasped and pulled, the winding core is pivoted in the storage case in a direction in which the sheet-like article can be unwound. The sheet-like article rotates around the center and is fed out from the opening of the storage case.
When the sheet-like article is pulled out by a desired length, the sheet-like article is cut by pressing it against a cutter provided at an opening edge of the storage case.

JP 2017-109849 A JP 2014-12603 A

By the way, in general, since a sheet-shaped article is held only by being wound around a core, if an impact is applied during transportation of a storage body of the sheet-shaped article, the sheet-shaped article is displaced in the axial direction of the core. The moving phenomenon was easy to occur.
And, since the conventional winding cores as in Patent Documents 1 and 2 have a uniform diameter up to the end, a part of the sheet-like article that has shifted may protrude from the end of the winding core as it is. there were.
When an impact is further applied in this state, a dent is formed at a portion of the sheet-like article protruding from the end of the core. When such dents occur, the appearance is poor, the commercial value is reduced, and when the sheet-like article is fed, the dents are unintentionally torn from the starting point, which poses a practical problem. .
It is conceivable to increase the strength of the winding of the sheet-like article around the core to suppress the axial displacement, but it is not possible to completely prevent the displacement, and wrap it excessively strongly. In this case, the sheet-shaped article may be broken during the winding operation.

  Accordingly, an object of the present invention is to prevent a wound core of a sheet-shaped article from moving to an end portion with respect to a core for winding the sheet-shaped article.

  In order to solve the above-mentioned problems, a winding core according to the present invention is connected to a cylindrical body portion capable of winding a sheet-shaped article around an outer periphery and at least one end portion of both end portions of the body portion, and the connection portion is provided. And a flange for preventing the sheet-shaped article wound around the outer periphery of the body from moving in the direction of the provided end.

  Providing the flange at the end of the winding core prevents the sheet-like article from moving toward the end of the winding core, protruding from the end, and generating a dent or the like.

In the winding core according to the present invention, it is preferable to adopt a configuration in which the flange portion is tapered from an inner end connected to the body portion to an outer end.
With this configuration, it is easy to integrally form the trunk and the flange by processing the end of the conventional winding core. In addition, since the flange is smoothly inclined, even when a large impact is applied and the sheet-shaped article suddenly moves in the axial direction of the winding core, the end of the sheet-shaped article collides with the wall surface of the flange. It is prevented from being damaged.

In the winding core according to the present invention, it is preferable that the angle formed by the outer circumference of the tapered flange and the outer circumference of the body is 100 to 150 degrees.
If this angle is less than 100 degrees, the rising angle of the flange from the trunk is too large, and when the sheet-shaped article moves and reaches the flange, it may collide with the wall surface of the flange and be damaged. There is. If the angle exceeds 150 degrees, the rising angle of the flange from the trunk is too small, and when the sheet-like article moves and reaches the flange, the sheet-like article gets over the flange and moves from the end of the winding core. There is a risk that it will protrude.

In the winding core according to the invention, the trunk and the flange are integrally formed from a cylindrical raw material, and the trunk is formed from a central portion of the raw material. A configuration formed by curling an end portion of the raw material into a curled shape can be adopted.
According to this structure, the flange can be formed on the core by the same technology as that for forming the rim on the peripheral portion of a general paper container or a synthetic resin container. Can be manufactured simply and at low cost.

In the winding core according to the invention, the trunk and the flange are formed separately, and the flange is a flange main body for preventing the sheet-shaped article from shifting and moving; And a fitting portion that can be fitted into an end portion of the body portion, the fitting portion being fitted into an end portion of the body portion.
According to this structure, it is possible to manufacture the core according to the present invention by using the conventional core as it is as the body part and fitting the flange to the end. Also, the material is different between the body and the flange, the body is made of paper, the flange is made of synthetic resin, etc., so that only the flange that requires a certain strength or more is reinforced. be able to. Even if a defect occurs in either the trunk or the collar, the entire core can be discarded instead of discarding the entire core, so that each part of the core can be effectively used. Can be

In the winding core according to the invention, it is preferable to adopt a configuration in which the surface roughness of the outer peripheral surface of the trunk is larger than the surface roughness of the inner peripheral surface of the trunk.
According to this structure, the frictional force between the outer peripheral surface of the body and the sheet-like article increases, so that the sheet-like article is further suppressed from moving toward the end of the core.

In the winding core according to the invention, a configuration may be employed in which the flange has a missing portion in a part of the trunk in the circumferential direction.
When the flange is continuously provided on the entire circumference of the trunk, if the flange is formed by expanding the entire circumference of the end of the winding core or the like, it cannot withstand the tensile load and cracks occur in the flange. There is fear. By providing a part where the flange is not provided on a part of the entire circumference of the body, it is possible to prevent a crack from being generated during the formation of the flange.

  In order to solve the above-mentioned problems, a container for a sheet-like article according to the present invention, a core according to the present invention, a sheet-like article wound around the trunk of the core, and the sheet-like article are wound. And a storage case for storing the winding core.

In the container for a sheet-like article according to the invention, the maximum diameter of the flange of the core is larger than the outer diameter of the wound sheet-like article, and the core is stored in the storage case. It is preferable to adopt a configuration in which the flange portion of the sheet-like article can contact the inner surface of the storage case, and the outer peripheral surface of the sheet-like article cannot contact the inner surface of the storage case.
With this configuration, since the sheet-like article is in a floating state inside the storage case, no frictional force is applied to the sheet-like article from portions other than the core at the time of feeding, and the sheet-like article can be fed smoothly. In addition, since the outer peripheral surface of the sheet-shaped article does not contact the inner surface of the storage case or becomes very small even if it does, scratching can be prevented, which is favorable in terms of hygiene.

In the container for a sheet-like article according to the present invention, it is preferable to adopt a configuration in which the winding core is a substantially cylindrical paper tube and the sheet-like article is an aluminum foil.
As a core, the paper tube is inexpensive, lightweight, and easy to dispose of. Also, in the case of a sheet-shaped article, when the aluminum foil has a dent, the inside and outside of the winding are caulked and easily adhered and easily broken, so a flange is provided on the winding core. Preventing dents is most effective.

In order to solve the above-mentioned problem, the package of the storage body of the sheet-like article according to the present invention, a packaging box having upper and lower surfaces, front and rear surfaces and left and right surfaces, and the axial direction of the core relative to the packaging box. A plurality of sheet-like article storage bodies according to the present invention, which are stored in parallel in the front-rear and left-right directions so as to substantially coincide with the up-down direction of the packaging box, Are connected to only one end of the portion, and the connected end is located on the lower surface side of the packaging box in a state where the storage body of the sheet-like article is stored in the packaging box. Configuration.
With this configuration, since the flange portion needs to be provided only at one end of the winding core, the fabrication is easier than when provided at both ends. When an impact is applied during the transportation of the package of the sheet-shaped article storage body, the sheet-shaped article usually shifts only on the lower side due to gravity due to the gravity, but the flange section is moved downward. , The further displacement movement is prevented.

In order to solve the above-mentioned problem, the method for manufacturing a winding core according to the present invention has a tapered shape in which the diameter is increased from the tip toward the root, and the diameter of the tip is smaller than the diameter of the raw material. The diameter of the part is larger than the diameter of the raw material, from the end of the opening of the raw material, by inserting the tip in a direction in which the tip is ahead of the root, the end of the raw material The step of expanding from the inside, and, the central portion of the raw material that was not expanded by the expanding step is a body portion capable of holding a roll formed by winding a sheet-shaped article on the outer periphery, The end of the raw material expanded by the expanding step is a tapered flange that prevents the roll body from moving off the outer circumference of the body in the direction of the end, It was done.
With this configuration, the core according to the present invention can be easily manufactured by processing the end of the conventional core with a punch.

In the method for manufacturing a winding core according to the invention, the step of expanding may be configured such that a guide is interposed between the raw material and the punch so that the punch does not contact the raw material.
With this configuration, the punch is prevented from being worn due to contact with the raw material, and the frequency of punch replacement can be reduced.

  Since the winding core and the like according to the present invention are configured as described above, it is possible to prevent the wound sheet-shaped article from moving to the end.

(A) of the storage body of the sheet-shaped article of embodiment is a perspective view of the disassembled state, (b) is a perspective view of the assembled state. Arrow sectional view of FIG. (A) of the winding core of the embodiment is a front view in a state in which the sheet-shaped article is in the center, and (b) is a front view in a state in which the sheet-shaped article is biased to the end. The principal part enlarged view which shows the inclination angle of the collar part of the winding core of embodiment. Manufacturing process diagram of the winding core of the embodiment The figure which shows the other example of the manufacturing process of the winding core of embodiment. The figure which shows the other example of the winding core of embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the sheet-shaped article storage body 1 of the embodiment includes a core 10 of the embodiment, a sheet-shaped article 20 wound around the core 10 of the embodiment, and a winding core of the embodiment. And a storage case 30 for storing the core. The special structure of the core 10 of the embodiment prevents the sheet-shaped article 20 from moving toward the end of the core 10.
In the present specification, to prevent (or prevent) the sheet-shaped article 20 from moving toward the end of the core 10 only to stop the sheet-shaped article 20 from completely moving from the core 10. This also includes a state in which the sheet-shaped article 20 has not reached the end of the core 10 even if the sheet-shaped article 20 has shifted from the core 10.

As shown in FIG. 1, the winding core 10 of the embodiment has a substantially cylindrical shape whose both end surfaces are open, and includes a central body 11 and flanges 12 provided at both ends of the body 11. Have.
The material of the winding core 10 is not particularly limited, and examples thereof include paper, synthetic resin, metal, and a combination thereof. However, the core is made of paper because it is inexpensive, lightweight, and easy to dispose of. Is preferred. As the paper core 10, a paper tube formed by stacking a plurality of layers of spirally wound strip-shaped base paper is generally used.

As shown in FIG. 1, the body 11 has a substantially uniform diameter over its entire length, and the sheet-like article 20 can be wound around its outer periphery.
As shown in FIG. 3, the length L in the axial direction of the body 11 is slightly larger than the width w of the sheet-like article 20, and the entire area in the width direction is wound around the body 11 so that the sheet-like article 20 does not protrude. It is possible to take.

The body 11 has an outer peripheral surface having a larger surface roughness than an inner peripheral surface. The surface roughness of the inner peripheral surface of the body 11 is similar to the surface roughness of a general winding core.
Since the surface of the outer peripheral surface of the trunk is rougher than usual, the sheet-like article 20 wound here is less likely to shift on the trunk 11 and move.
There is no particular limitation on the method of increasing the surface roughness of the outer peripheral surface of the trunk portion 11. However, after the entire core 10 is manufactured, only the outer peripheral surface of the trunk portion 11 may be roughened, or as a strip-shaped base paper. For example, a material having different surface roughnesses on both surfaces is prepared in advance, and the core 10 is formed by winding the surface so that the surface roughness on the outer peripheral side is larger than the surface roughness on the inner peripheral side.

As shown in FIG. 1, the flange 12 is continuously and integrally connected to the entire periphery of both ends of the body 11, and has a tapered shape that expands in diameter from the connected inner end to the outer end. No. The diameter of the inner end of the flange 12 connected to the body 11 is substantially the same as the diameter of the body, and the diameter (maximum diameter) of the outer end of the flange is larger than the diameter of the body.
With the presence of the flange 12, even if the sheet-like article 20 wound on the body 11 is displaced in the axial direction of the winding core 10 as shown in FIG. The edge of the sheet-like article 20 comes into contact with the flange 12 at the boundary between the flange 12 and the flange 12, and further shifting movement is prevented.

The inclination angle α of the flange shown in FIG. 4 (the angle formed by the outer periphery of the trunk and the outer periphery of the flange) is not particularly limited, but is preferably 100 to 150 degrees, more preferably 110 to 140 degrees.
If the inclination angle α is less than 100 degrees, the angle at which the flange 12 rises from the trunk 11 is too large, and the end of the sheet-like article 20 that has shifted from the trunk 11 collides head-on against the wall surface of the flange. It may be damaged. Further, when the inclination angle α exceeds 150 degrees, the angle at which the flange 12 rises from the body 11 is too small, and the end of the sheet-like article 20 shifted from the body 11 rides on the flange 12, and There is a possibility that the core 10 may run over the end face of the winding core over the portion 12 or a length of the winding core 10 in the axial direction may be increased.
The length of the flange 12 in the axial direction is not particularly limited, but is preferably 2 to 6 mm, and more preferably 2.5 to 4 mm. If it is less than 2 mm, the sheet-like article 20 may get over the flange 12 when a large impact is applied. If it exceeds 6 mm, the axial length of the winding core 10 may be too large and bulky.

As shown in FIGS. 1 and 2, the sheet-like article 20 is wound in a roll shape around the outer periphery of the body 11 of the winding core 10.
The type of sheet-like article is not particularly limited, and examples thereof include aluminum foil, cooking paper, and paper towel. Surface treatment such as silicon coating on the surface of the aluminum foil can also be performed. In particular, a sheet-like article having a slippery surface is apt to be easily shifted from the winding core 10 when wound up in a roll shape, and thus the application of the winding core of the present invention can effectively prevent the shifting movement. .
As shown in FIG. 2, the roll diameter r of the sheet-like article 20 wound on the core 10 is larger than the diameter of the body 11 of the core 10 and corresponds to the outer end of the flange 12. It is smaller than the maximum diameter R.

As shown in FIGS. 1 and 2, the storage case 30 includes a case body 31 that stores the core 10 around which the sheet-shaped article 20 is wound, a flap 32, and a lid 33 that can open and close an opening of the case body 31. , A cutter 34.
The material of the storage case 30 is not particularly limited, and examples thereof include paper, synthetic resin, and metal. However, the storage case 30 is preferably made of paper because it is lightweight, inexpensive, and easy to dispose.

As shown in FIGS. 1 and 2, the case body 31 includes a front plate 31 a and a back plate 31 b facing front and rear, a pair of side plates 31 c facing left and right, and a bottom plate 31 d. It has an elongated rectangular parallelepiped shape.
The distance between the left and right side plates 31c of the case body 31 is substantially the same as or slightly larger than the axial length L of the winding core 10, and the distance between the front plate 31a and the back plate 31b is the maximum diameter of the winding core 10. It is almost the same as R or slightly larger. The winding core 10 is accommodated in the case main body 31 with a slight gap so that the axial direction thereof coincides with the left-right direction of the case main body 31.

As described above, since the maximum diameter R of the core 10 is larger than the roll diameter r of the sheet-like article 20, the core 10 is stored in the case body 31 as shown in FIG. The flange 12 contacts the inner surfaces of the bottom plate 31d, the front plate 31a, and the back plate 31b of the case body 31. On the other hand, the sheet-like article 20 wound in a roll shape is in a state of being suspended in the air without contacting the inner surface of the case body 31.
Therefore, the sheet-shaped article 20 rubs against the case body 31 when the sheet-shaped article 20 is fed out by pulling the winding end of the sheet-shaped article 20 wound in a roll shape around the winding core 10 through the opening of the case body 31. It will be paid out smoothly.

Flaps 32 are continuously provided on the upper edges of the pair of side plates 31c of the case body 31, and the flaps 32 are bent toward the storage space of the case body 31. At the boundary of the flap 32 with the side plate 31c, a lock piece 32a is defined by a cut, and the lock piece 32a is not bent.
Since the left and right flaps 32 face the opening of the case main body in a state where the core 10 is stored in the case main body 31, the flaps 32 serve as barriers, and the core 10 is Jumping out of the opening is prevented.

As shown in FIGS. 1 and 2, the lid 33 has a front plate 33 a, a pair of left and right side plates 33 b, and a top plate 33 c, and a rear edge of the top plate 33 c is a rear plate of the case body 31. It is connected to the upper edge.
The lid 33 can be rotated around the boundary between the top plate 33c and the back plate 31b of the case main body 31, so that the top opening of the case main body 31 can be closed and opened. .
With the cover 33 closing the opening of the case body 31, the front plate 33a of the cover 33 and the front plate 31a of the case body 31 overlap so that the front plate 33a is on the outside and the front plate 31a is on the inside. Similarly, the left and right side plates 33b of the lid 33 and the left and right side plates 31c of the case body 31 overlap so that the side plate 33b is on the outside and the side plate 31c is on the inside. Here, in the closed state, the lock piece 32 a of the flap 32 is pressed against the inner surface of the side plate 33 b of the lid 33. Therefore, the lid 33 is held by the lock piece 32a, and it is prevented that the lid 33 is rotated by the elasticity of the material or the like and the opening of the case body 31 is unintentionally opened.

As shown in FIGS. 1 and 2, a saw-shaped cutter 34 is continuously provided on the inner surface of the lower edge of the front plate 33 a of the lid 33.
The sheet-like article 20 pulled out to a desired length is cut by being pressed against the cutter 34 and used for use.

  The configurations of the sheet-shaped article storage body 1 of the embodiment and the core 10 of the embodiment are as described above. Next, a method of manufacturing the core 10 of the embodiment will be described with reference to FIGS. 5 and 6. .

First, as shown in FIG. 5A, a raw material S and a punch P are prepared. The raw material S is cylindrical and has a uniform diameter over the entire length. Although the type of the raw material S is not limited, a general paper tube can be exemplified.
The punch P has a tapered portion t whose diameter increases from the tip to the root. The diameter at the tip of the tapered portion t is smaller than the diameter (inner diameter) of the raw material S, and the diameter at the root of the tapered portion t is larger than the diameter (outer diameter) of the raw material S. The outer peripheral surface of the tapered portion t is concave in an arc shape.
Now, as shown in FIGS. 5 (a) and 5 (b), the punch P is advanced in a state where the end face of the raw material S and the tip of the punch P face each other, and the tip of the tapered portion t is moved to the end face of the raw material S. Insert through the opening.

When the punch P is further advanced, the punch P tries to enter the end face opening of the raw material S to the root of the tapered portion t. At this time, due to the above-described dimensional relationship, when the root portion of the tapered portion t enters, the end portion of the raw material S is pushed out from the inside, and is deformed into a tapered shape as shown in FIG.
In order to facilitate such deformation, the raw material S may be appropriately heated or the like.
Both ends processed by the punch P of the raw material S become the flanges 12, and the central part which is not affected by the punch P becomes the body 11, thereby completing the winding core 10 of the embodiment.

Alternatively, as shown in FIG. 6A, a guide G is prepared in addition to the raw material S and the punch P. The guide G is divided in the circumferential direction and can be expanded in diameter. The tapered portion t of the punch P is linearly inclined.
As shown in the drawing, the punch P is advanced and inserted into the guide G in a state where the guide G is inserted into the end face opening of the raw material S in advance. Due to the wedge action of the tapered portion t of the punch P, the diameter of the guide G is expanded, whereby the end of the raw material S is pushed and expanded from the inside, and is deformed into a tapered shape as shown in FIG.
By interposing the guide G between the punch P and the raw material S, the punch P does not come into contact with the raw material S, and the abrasion of the punch P at the time of manufacturing the winding core 10 is suppressed.
In addition, the formation of the flange portion 12 at the end of the raw material S may be performed by processing the raw material S in a state before the sheet-shaped article 20 is wound up by the punch P described above, After winding the sheet-like article 20 around S, the end of the raw material S may be formed by performing the above-described processing.

  Next, the content of the present invention will be further clarified by giving Examples and Comparative Examples of the present invention.

As an example, a body and a winding core in which a tapered flange is not provided at both ends of the body are prepared, and a predetermined length of aluminum foil is wound around the winding core, and then the end of the body ( A tapered flange was provided at both ends of the body by inserting a punch into the portion where the aluminum foil was not wound) and expanding the end.
Here, the total length of the winding core is 256 mm, the diameter of the trunk is 29 mm, the inclination angle of the flange is 135 degrees, the maximum diameter of the flange is 32 mm, the width of the aluminum foil is 250 mm, and the foil thickness of the aluminum foil is 11 μm. The length of the rolled aluminum foil was 15 m, and the diameter of the rolled aluminum foil was 31 mm.
As a comparative example, a core without a flange was prepared, and an aluminum foil foil similar to that of the example was wound around the core.
Here, the dimensions in the comparative example are the same as those in the example except for the flange.

Next, a cylindrical container with a bottom having a larger diameter than the winding core on which the aluminum foil was wound was prepared, and the winding cores of the examples and the comparative examples were arranged so that the axial direction thereof was oriented in the up-down direction. It was inserted until the distance between the lower end and the bottom of the container became 10 cm.
From here, the winding cores of the examples and comparative examples were allowed to fall naturally, and the degree of displacement of the aluminum foil was observed.
Here, if the aluminum foil is not displaced relative to the core or the aluminum foil is displaced relative to the core but not to the end, ○, the aluminum foil is displaced relative to the core When reaching the moving end, it was evaluated as x.
As a result, a result of ○ in the example and a result of × in the comparative example were obtained. Thus, it was found that in the winding core of the example, the shifting movement of the aluminum foil was sufficiently suppressed.

  The embodiments and examples disclosed this time are illustrative in all aspects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications and variations within the scope of the claims and equivalents thereto.

In the embodiment, the flange portions 12 of the winding core 10 are provided at both ends of the body portion 11, but may be provided only at one end portion as shown in FIG.
In general, when transporting the storage body 1 of sheet-like articles, the storage body 1 is placed in a packaging box having upper and lower surfaces, front and rear surfaces, and left and right surfaces, and the axial direction of the core substantially coincides with the vertical direction of the packaging box. So that they are stored in parallel in the left-right direction. That is, the sheet is transported in the form of a package of a container of articles. When the flange 12 of the winding core 10 is provided only at one end of the body 11, the flange 12 is placed in a packaging box. It is preferable to store it so that it is located on the side of the lower surface of the.
During transportation, due to gravity, the sheet-like article 20 usually tends to move toward the lower surface of the packaging box but does not attempt to move toward the upper surface. Since the flange 12 of the winding core 10 exists in the direction of the lower surface of the packaging box, the sheet-shaped article 20 is prevented from shifting.

Further, the shape of the flange 12 of the core 10 is not limited to the tapered shape of the embodiment, and can prevent the sheet-like article 20 wound around the outer periphery of the body 11 from moving toward the end of the core 10. Should be fine.
For example, as shown in FIG. 7B, it may be a flange-shaped one, or as shown in FIG.
As for the dimensions of the flange portion 12, as in the embodiment, it is preferable that the maximum diameter is larger than the diameter of the trunk portion 11, but at least the maximum diameter of the flange portion 12 is the same as the diameter of the trunk portion 11. For example, an effect of preventing the sheet-shaped article 20 from shifting can be obtained.
In the embodiment, the body 11 and the flange 12 of the winding core 10 are formed integrally, but may be formed separately and then integrated.
For example, as shown in FIG. 7B, the flange portion 12 is fitted with a flange main body 12 a having a larger diameter than the trunk portion 11 and concentrically with the flange main body 12 a, and has substantially the same diameter as the inner diameter of the trunk portion 11. The fitting part 12b can be integrated with the body 11 by fitting the fitting part 12b into the open end of the body part 11.
The mode of forming the flange portion 12 is not limited to the embodiment. For example, as shown in FIG. 7C, the flange portion 12 may be formed using a wrapping technique used for a conventional paper container or a synthetic resin container. Can also.
The flange 12 is not limited to being formed continuously along the entire circumference of the body 11 as in the embodiment, and may have a missing part of the flange 12 in a part of the entire circumference. That is, the flange portion 12 may be formed intermittently on the entire circumference of the body portion 11 or may be formed only on a part thereof.

  The method of manufacturing the winding core 10 is not limited to the embodiment. For example, when the material of the winding core 10 is made of synthetic resin, it is not necessary to process the end of the raw material having a uniform diameter with the punch P as in the embodiment, and the desired flange 12 is formed. What is necessary is just to shape | mold using a metal mold | die etc.

The shape of the storage case 30 is not limited to the shape of the embodiment as long as the winding core 10 on which the sheet-shaped article 20 is wound can be stored.
For example, the flap 32 and the lock piece 32a can be omitted. In addition, a lock piece that can be pushed into the storage space is provided by cutting into both side plates 31c of the case main body 31, and this lock piece is pushed in and inserted into an end opening of the core 10, whereby the case of the core 10 is Jumping out of the main body 31 can also be prevented.

1. Sheet-shaped article storage body 10 according to one embodiment Roller core 11 according to one embodiment Body part 12 Flange part 12a Flange body 12b Fitting part 20 Sheet-shaped article 30 Storage case 31 Case body 31a Front plate 31b Back plate 31c Side plate 31d Bottom Face plate 32 Flap 32a Lock piece 33 Lid 33a Front plate 33b Side plate 33c Top plate 34 Cutter R Maximum diameter of flange R Roll diameter of sheet-like article L Length of body in axial direction w Width of sheet-like article α Inclination angle S Raw material P Punch t Punch taper G Guide

Claims (13)

A tubular body capable of winding the sheet-shaped article around the outer periphery,
A flange portion that is connected to at least one end portion of both ends of the body portion, and that prevents a sheet-like article wound around the outer periphery of the body portion from moving in the direction of the connected end portion, A winding core provided with.   The core according to claim 1, wherein the flange portion is tapered from an inner end connected to the body to an outer end.   The core according to claim 2, wherein an angle formed between an outer periphery of the trunk and an outer periphery of the tapered flange is 100 to 150 degrees. The trunk and the flange are integrally formed from a cylindrical raw material,
The trunk is formed from a central portion of the raw material,
The core according to claim 1, wherein the flange is formed by curling at least one end of both ends of the raw material in a curl shape. The trunk and the flange are formed separately,
The flange has a flange main body for preventing the sheet-shaped article from shifting and moving, and a fitting portion that can be fitted to an open end of the body.
The core according to any one of claims 1 to 3, wherein the fitting portion is fitted into an end of the body.   The core according to any one of claims 1 to 5, wherein a surface roughness of an outer peripheral surface of the trunk portion is larger than a surface roughness of an inner peripheral surface of the trunk portion.   The winding core according to any one of claims 1 to 6, wherein the flange portion has a missing portion in a part of the trunk portion in a circumferential direction. A core according to any one of claims 1 to 7,
A sheet-shaped article wound around the body of the core,
And a storage case for storing the core around which the sheet-shaped article has been wound. The maximum diameter of the collar of the core is
Larger than the outer diameter of the wound sheet-like article,
In the state stored in the storage case,
The collar of the winding core is capable of contacting the inner surface of the storage case,
The storage body for a sheet-shaped article according to claim 8, wherein an outer peripheral surface of the sheet-shaped article cannot contact with an inner surface of the storage case. The winding core is a substantially cylindrical paper tube,
The container for a sheet-like article according to claim 8 or 9, wherein the sheet-like article is an aluminum foil. A packaging box having upper and lower surfaces, front and rear surfaces, and left and right surfaces,
The plurality of sheets according to any one of claims 8 to 10, wherein the plurality of sheets are stored in the packaging box in parallel in the front-rear and left-right directions such that the axial direction of the core substantially matches the up-down direction of the packaging box. And a container for shaped articles,
The collar portion of the winding core is provided continuously only at one end of both ends of the body portion, and the connected end portion is provided with the housing of the sheet-like article stored in the packaging box. In the state, the package of the storage body of the sheet-like article is located on the lower surface side of the packaging box. A step of preparing a substantially cylindrical raw material having a uniform diameter;
A punch having a tapered shape in which the diameter increases from the tip toward the root, and the diameter of the tip is smaller than the diameter of the raw material, and the diameter of the root is larger than the diameter of the raw material. From the opening end of the opening, the tip portion is inserted in a direction preceding the root portion, thereby expanding the end portion of the raw material from the inside,
The central portion of the raw material that has not been expanded by the expanding process is a body portion that can hold a roll formed by winding a sheet-shaped article on the outer periphery,
The end of the raw material expanded by the expanding step is a tapered flange that prevents the roll body from moving off the outer periphery of the body in the direction of the end,
A method for manufacturing a core. The step of expanding is
The method according to claim 12, wherein a guide is interposed between the raw material and the punch so that the punch does not contact the raw material.

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