JP7088798B2 - Winding core - Google Patents

Description

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

A storage body for a sheet-shaped article obtained by winding a sheet-shaped article such as aluminum foil around a tubular winding core such as a paper tube as in Patent Documents 1 and 2 and storing the winding core in a storage case is commercially available. ing.
When using a sheet-shaped article, when the winding end appearing on the outer circumference of the sheet-shaped article wound in a roll shape is grasped and pulled, the winding core is shafted in the storage case in the direction in which the sheet-shaped article is unwound. It rotates around the heart and the sheet-like article is unwound from the opening of the storage case.
When the sheet-shaped article is pulled out by a desired length, it is cut by pressing it against a cutter provided at the opening edge of the storage case.

JP-A-2017-109894 Japanese Unexamined Patent Publication No. 2014-12603

By the way, in general, since the sheet-shaped article is held only by being wound around the winding core, if an impact is applied during transportation of the storage body of the sheet-shaped article, the sheet-shaped article shifts in the axial direction of the winding core. The phenomenon of movement was likely to occur.
Since the conventional winding cores such as Patent Documents 1 and 2 have a uniform diameter up to the end portion, a part of the displaced sheet-like article may protrude from the end portion of the winding core as it is. there were.
If an impact is further applied in this state, dents are generated at the portion protruding from the end of the winding core of the sheet-shaped article. When such dents occur, the appearance is poor and the commercial value is lowered, and when the sheet-like article is unwound, the dents are unintentionally torn from the starting point, which is a practical problem. ..
It is conceivable to suppress the axial displacement movement by increasing the winding strength of the sheet-like article around the winding core, but it is not possible to completely prevent the displacement movement, so let's wind it excessively strongly. Then, there is a possibility that the sheet-shaped article may be broken during the winding operation.

Therefore, the problem to be solved by the present invention is to prevent the wound sheet-like article from shifting to the end of the winding core for winding the sheet-like article.

In order to solve the above-mentioned problems, the winding core according to the invention is connected to a tubular body portion capable of winding a sheet-shaped article on the outer periphery and at least one end of both ends of the body portion, and the series thereof. The structure is provided with a flange portion for preventing the sheet-shaped article wound around the outer periphery of the body portion from shifting and moving in the direction of the provided end portion.

By providing the flange portion at the end portion of the winding core, it is possible to prevent the sheet-shaped article from shifting in the direction of the end portion of the winding core and protruding from the end portion, resulting in dents and the like.

In the winding core according to the invention, it is preferable to adopt a structure in which the flange portion is tapered from the inner end to the outer end connected to the body portion.
With such a configuration, it becomes easy to integrally form the body portion and the flange portion by processing the end portion of the conventional winding core. In addition, since the flange is smoothly inclined, the end of the sheet collides with the wall surface of the flange even when the sheet-like article suddenly shifts in the axial direction of the winding core due to a large impact. It is prevented from being damaged by such things as.

In the winding core according to the invention, the angle formed by the outer circumference of the tapered flange portion and the outer circumference of the body portion is preferably 100 degrees to 150 degrees.
If this angle is less than 100 degrees, the rising angle of the collar from the body is too large, and when the sheet-like article shifts to reach the collar, it may collide with the wall surface of the collar and be damaged. There is. If the angle exceeds 150 degrees, the rising angle of the collar from the body is too small, and when the sheet-like article shifts to reach the collar, it gets over the collar and starts from the end of the winding core. There is a risk of it sticking out.

In the winding core according to the invention, the body portion and the flange portion are integrally formed of a tubular raw material, the body portion is formed from the central portion of the raw material, and the collar portion is formed. , It is possible to adopt a configuration formed by curling the end portion of the raw material in a curl shape.
With this configuration, a collar can be formed on the winding core by the same technique as forming a marginal winding on the peripheral edge of a general paper container or synthetic resin container. Therefore, the winding core according to the invention. Can be manufactured easily and at low cost.

In the winding core according to the present invention, the body portion and the flange portion are formed separately, and the flange portion includes a collar portion main body for preventing the sheet-shaped article from shifting and moving, and the body portion. It is possible to adopt a configuration in which the fitting portion has a fitting portion that can be fitted into the opening end portion of the body portion, and the fitting portion is fitted into the end portion of the body portion.
With this configuration, the conventional winding core can be used as it is as the body portion, and the winding core according to the invention can be manufactured by fitting the flange portion into the end portion thereof. In addition, the material is different between the body and the collar, the body is made of paper, and the collar is made of synthetic resin, so that only the collar that requires a certain level of strength is reinforced. be able to. Even if a defect occurs in either the body or the collar, it is only necessary to dispose of the body or collar instead of discarding the entire core, so effective use of each part of the core is shown. Will be.

In the winding core according to the present invention, it is preferable to adopt a configuration in which the surface roughness of the outer peripheral surface of the body portion is larger than the surface roughness of the inner peripheral surface of the body portion.
With this configuration, the frictional force with the sheet-shaped article on the outer peripheral surface of the body portion becomes large, so that the sheet-shaped article is further suppressed from shifting in the direction of the end portion of the winding core.

In the winding core according to the present invention, it is possible to adopt a configuration in which the flange portion has a missing portion in a part in the circumferential direction of the body portion.
When the flange is continuously provided on the entire circumference of the body, if an attempt is made to form the flange by expanding the entire circumference of the end of the winding core, the flange cannot withstand the tensile load and the collar cracks. There is a fear. By providing a portion where the flange portion is not provided on a part of the entire circumference of the body portion, it is possible to prevent cracking during the formation of the flange portion.

In order to solve the above-mentioned problems, the storage body of the sheet-shaped article according to the invention is wound with the winding core according to the invention, the sheet-shaped article wound around the body of the winding core, and the sheet-shaped article. It is configured to include a storage case for storing the winding core.

In the storage body for the sheet-shaped article according to the present invention, the maximum diameter of the collar portion of the winding core is larger than the outer diameter of the wound sheet-shaped article, and the winding core is stored in the storage case. It is preferable to adopt a configuration in which the flange portion of the sheet can be in contact with the inner surface of the storage case, and the outer peripheral surface of the sheet-shaped article cannot be in contact with the inner surface of the storage case.
With this configuration, since the sheet-shaped article is in a floating state inside the storage case, frictional force is not applied from other than the winding core at the time of feeding, and the sheet-shaped article can be smoothly fed. Further, since the outer peripheral surface of the sheet-shaped article is not in contact with the inner surface of the storage case, or even if it is in contact with the inner surface, it is possible to prevent scratches, which is also suitable for hygiene.

In the storage body of the sheet-shaped article according to the invention, it is preferable to adopt a structure in which the winding core is a substantially cylindrical paper tube and the sheet-shaped article is an aluminum foil.
As a winding core, the paper tube is inexpensive, lightweight, and easy to dispose of. In addition, as a sheet-shaped article, when the aluminum foil is dented, the inside and outside of the winding become crimped and easily stick to each other, so that a flange portion is provided on the winding core. It is most effective to prevent dents.

In order to solve the above-mentioned problems, the packaging body of the sheet-shaped article accommodating body according to the invention is provided with a packaging box having upper and lower surfaces, front-rear surfaces and left-right surfaces, and the axial direction of the winding core with respect to the packaging box. It is composed of a storage body for a plurality of sheet-shaped articles according to the invention, which are stored side by side in the front-back and left-right directions so as to substantially coincide with the vertical direction of the packaging box. It is connected only to one end of the part, 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-shaped article is stored in the packaging box. Can be configured as
With such a configuration, since the flange portion needs to be provided only on one end of the winding core, it is easier to manufacture than the case where the flange portion is provided on 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 downward due to gravity, but the sheet-shaped article shifts on the body of the winding core, but the flange portion is downward. Because of the existence of, further displacement movement is prevented.

In order to solve the above-mentioned problems, the winding core manufacturing method according to the invention has a tapered shape in which the diameter is expanded from the tip portion to the root portion, and the diameter of the tip portion is smaller than the diameter of the raw material at the root portion. By inserting a punch having a diameter larger than the diameter of the raw material from the opening end portion of the raw material in a direction in which the tip portion precedes the root portion, the end portion of the raw material is inserted. The central portion of the raw material, which includes the step of expanding from the inside and which is not expanded by the step of expanding, becomes a body portion capable of holding the roll body on which the sheet-shaped article is wound on the outer circumference. The end portion of the raw material expanded by the expanding step becomes a tapered flange portion that prevents the roll body from shifting from above the outer periphery of the body portion in the direction of the end portion. I did.
With this configuration, the winding core according to the invention can be easily manufactured by processing the end portion of the conventional winding core with a punch.

In the method for manufacturing a winding core according to the present invention, the expanding step can be configured such that a guide is interposed between the raw material and the punch so that the punch does not come into contact with the raw material.
With such a configuration, it is possible to prevent the punch from being worn due to contact with the raw material, and it is possible to reduce the frequency of punch replacement.

Since the winding core and the like according to the invention are configured as described above, it has become possible to prevent the wound sheet-like article from shifting to the end.

(A) is a perspective view in a disassembled state, and (b) is a perspective view in an assembled state of the storage body of the sheet-shaped article of the embodiment. Cross-sectional view taken along the arrow in FIG. 1 (b) The winding core (a) of the embodiment is a front view in a state where the sheet-shaped article is in the center, and (b) is a front view in a state where the sheet-shaped article is biased toward the end. Enlarged view of the main part showing the inclination angle of the collar portion of the winding core of the 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 FIGS. 1 and 2, the sheet-shaped article accommodating body 1 of the embodiment includes the winding core 10 of the embodiment, the sheet-shaped article 20 wound around the winding core 10 of the embodiment, and the winding of the embodiment. It has a storage case 30 for storing the core, and the special structure of the winding core 10 of the embodiment prevents the sheet-shaped article 20 from shifting to the end of the winding core 10.
In the present specification, preventing (or preventing) the sheet-shaped article 20 from shifting to the end of the winding core 10 only means stopping the complete displacement of the sheet-shaped article 20 from the winding core 10. However, even if the sheet-shaped article 20 is displaced from the winding core 10, it includes a state in which the end portion of the winding core 10 is not reached.

As shown in FIG. 1, the winding core 10 of the embodiment has a substantially cylindrical shape with both end faces open, and has a central body portion 11 and a flange portion 12 connected to both ends of the body portion 11. Have.
The material of the winding core 10 is not particularly limited, and examples thereof include paper, synthetic resin, metal, and a composite of these, but the core 10 is made of paper because it is inexpensive, lightweight, and easy to dispose of. Is preferable. As the paper winding core 10, a paper tube formed by laminating a plurality of layers of a strip-shaped base paper spirally wound is generally used.

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

The surface roughness of the outer peripheral surface of the body portion 11 is larger than the surface roughness of the inner peripheral surface. The surface roughness of the inner peripheral surface of the body portion 11 is the same as the surface roughness of a general winding core.
Since the surface of the outer peripheral surface of the body portion is rougher than usual, the sheet-shaped article 20 wound here is less likely to shift on the body portion 11.
The method for increasing the surface roughness of the outer peripheral surface of the body portion 11 is not particularly limited, but after the entire winding core 10 is manufactured, only the outer peripheral surface of the body portion 11 is roughened, or as a strip-shaped base paper. For example, those having different surface roughness on both sides are prepared in advance and wound so that the surface roughness on the outer peripheral side is larger than the surface roughness on the inner peripheral side to form the winding core 10.

As shown in FIG. 1, the flange portion 12 is continuously and integrally connected to the entire circumference of both ends of the body portion 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 collar 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 collar is larger than the diameter of the body.
Due to the presence of the flange portion 12, even if the sheet-shaped article 20 wound around the body portion 11 shifts in the axial direction of the winding core 10 as shown in FIGS. 3A to 3B, the body portion 11 The end portion of the sheet-shaped article 20 comes into contact with the flange portion 12 at the boundary between the flange portion 12 and the flange portion 12, and further displacement movement is prevented.

The inclination angle α of the flange portion shown in FIG. 4 (the angle formed by the outer circumference of the body portion and the outer circumference of the flange portion) is not particularly limited, but is preferably 100 degrees to 150 degrees, more preferably 110 to 140 degrees.
If the inclination angle α is less than 100 degrees, the angle at which the collar portion 12 rises from the body portion 11 is too large, and the end portion of the sheet-shaped article 20 displaced from the body portion 11 collides head-on with the wall surface of the collar portion. May be damaged. Further, when the inclination angle α exceeds 150 degrees, the angle at which the collar portion 12 rises from the body portion 11 is too small, and the end portion of the sheet-shaped article 20 displaced from the body portion 11 rides on the collar portion 12 and further collars. There is a risk that the winding core 12 may get over the portion 12 and protrude from the end surface of the winding core, or the length of the winding core 10 in the axial direction may increase.
The length of the flange portion 12 in the axial direction is not particularly limited, but is preferably 2 to 6 mm, more preferably 2.5 to 4 mm. If it is less than 2 mm, the sheet-shaped article 20 may get over the flange portion 12 when a large impact is applied. If it exceeds 6 mm, the axial length of the winding core 10 may become too large and become bulky.

As shown in FIGS. 1 and 2, the sheet-shaped article 20 is wound around the outer periphery of the body portion 11 of the winding core 10 in a roll shape.
The type of the sheet-shaped article is not particularly limited, and examples thereof include aluminum foil, cooking paper, and paper towels. Surface treatment such as silicon coating on the surface of aluminum foil can also be performed. In particular, if the surface of the sheet-like article is slippery, the winding core 10 is likely to shift from the winding core 10 when wound into a roll, and the application of the winding core of the present invention is effective because the shifting movement can be prevented. ..
As shown in FIG. 2, the roll diameter r of the sheet-shaped article 20 in a state of being wound around the winding core 10 is larger than the diameter of the body portion 11 of the winding core 10 and corresponds to the outer end of the flange portion 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 for storing the winding core 10 around which the sheet-shaped article 20 is wound, a flap 32, and a lid 33 that can open and close the opening of the case body 31. , Cutter 34 and.
The material of the storage case 30 is not particularly limited, and examples thereof include paper, synthetic resin, and metal, but paper is preferable because it is lightweight, inexpensive, and easy to dispose of.

As shown in FIGS. 1 and 2, the case body 31 is composed of a front plate 31a and a back plate 31b facing each other in the front-rear direction, a pair of side plates 31c facing each other in the left-right direction, and a bottom plate 31d in the left-right direction in which the top surface opens. It has an elongated rectangular parallelepiped shape.
The distance between the left and right side plates 31c of the case body 31 is approximately 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. Almost the same as or slightly larger than R. The winding core 10 is housed in a state where the case main body 31 has a slight gap so that the axial direction thereof and the left-right direction of the case main body 31 coincide with each other.

As described above, since the maximum diameter R of the winding core 10 is larger than the roll diameter r of the sheet-shaped article 20, the winding core 10 is housed in the case body 31 as shown in FIG. The flange portion 12 comes into contact with 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-shaped article 20 wound up in a roll shape does not come into contact with the inner surface of the case body 31, and is in a state of floating in the air.
Therefore, when the winding end of the sheet-shaped article 20 wound into a roll around the winding core 10 is pulled through the opening of the case body 31 and the sheet-shaped article 20 is unwound, the sheet-shaped article 20 rubs against the case body 31. It will be delivered smoothly without any.

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. A lock piece 32a is partitioned by a notch at the boundary of the flap 32 with the side plate 31c, and the lock piece 32a is not bent.
Since the left and right flaps 32 face the opening of the case body with the winding core 10 housed in the case body 31, the flaps 32 act as a barrier and the winding core 10 unintentionally becomes the case body 31. It is prevented from popping out of the opening.

As shown in FIGS. 1 and 2, the lid 33 has a front plate 33a, a pair of side plates 33b facing left and right, and a top plate 33c, and the trailing edge of the top plate 33c is a back plate 31b 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 body 31, and can close and open the top opening of the case body 31. ..
With the lid 33 closing the opening of the case body 31, the front plate 33a of the lid 33 and the front plate 31a of the case body 31 overlap each other 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 each other so that the side plates 33b are on the outside and the side plates 31c are on the inside. Here, in the closed state, the lock piece 32a of the flap 32 is pressed against the inner surface of the side plate 33b of the lid 33. Therefore, the lid 33 is held by the lock piece 32a, and the lid 33 is prevented from rotating due to the restoring 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, sawtooth-shaped cutters 34 are continuously provided on the inner surface of the lower edge of the front plate 33a of the lid 33.
The sheet-shaped article 20 pulled out to a desired length is cut by being pressed against the cutter 34 and used.

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

As shown in FIG. 5A, first, the raw material S and the punch P are prepared. The raw material S is cylindrical and has a uniform diameter over the entire length. The type of such raw material S is not limited, but a general paper tube can be exemplified.
The punch P has a tapered portion t whose diameter increases from the tip portion to the root portion. The diameter of the tip portion of the tapered portion t is smaller than the diameter (inner diameter) of the raw material S, and the diameter of the root portion 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 recessed in an arc shape.
Now, as shown in FIGS. 5A to 5B, the punch P is advanced with the end face of the raw material S and the tip of the punch P facing each other, and the tip of the tapered portion t is the end face of the raw material S. Insert through the opening.

When the punch P is further advanced, it tries to enter the end face opening of the raw material S up to the root portion of the tapered portion t. At this time, due to the above-mentioned dimensional relationship, when the root portion of the tapered portion t enters, the end portion of the raw material S is expanded from the inside and deformed in a tapered shape as shown in FIG. 5 (b).
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 flange portions 12, and the central portion that is not affected by the punch P becomes the body portion 11, and the winding core 10 of the embodiment is completed.

Alternatively, as shown in FIG. 6A, a guide G is prepared in addition to the raw material S and the punch P. This guide G is divided in the circumferential direction, and the diameter can be expanded. The tapered portion t of the punch P is inclined linearly.
As shown in the figure, with the guide G inserted in the end face opening of the raw material S in advance, the punch P is advanced and inserted into the guide G. 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 portion of the raw material S is expanded from the inside and deformed in a tapered shape as shown in FIG. 6 (b).
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 wear of the punch P during the production of the winding core 10 is suppressed.
The flange portion 12 may be formed on the end portion of the raw material S by processing the raw material S in a state before winding the sheet-shaped article 20 with the punch P described above. After winding the sheet-shaped article 20 around S, the end portion of the raw material S may be formed by performing the above-mentioned processing.

Next, the contents of the present invention will be further clarified by giving examples and comparative examples of the present invention.

As an embodiment, a winding core having no tapered flanges provided at both ends of the body portion and the body portion is prepared, and aluminum foil of a predetermined length is wound around the winding core, and then the end portion of the body portion ( By inserting a punch into the part where the aluminum foil is not wound) and expanding the diameter of the end, tapered collars are provided at both ends of the body.
Here, the total length of the winding core is 256 mm, the diameter of the body 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 winding diameter of the rolled aluminum foil was 31 mm.
Further, as a comparative example, a winding core having no flange portion was prepared, and the same aluminum foil foil as in the embodiment was wound around the winding core.
Here, the dimensions in the comparative example are the same as those in the embodiment except for the flange portion.

Then, a bottomed cylindrical container having a diameter larger than that of the winding core in which the aluminum foil was wound was prepared, and the winding cores of the examples and the comparative examples were oriented so that their axial directions were oriented in the vertical direction and the same. It was inserted until the distance between the lower end and the bottom of the container was 10 cm.
From here, the winding cores of the examples and comparative examples were naturally dropped, and the degree of displacement of the aluminum foil was observed.
Here, if the aluminum foil is not displaced with respect to the winding core, or if the aluminum foil is displaced with respect to the winding core but does not reach the end, ○, and the aluminum foil is displaced with respect to the winding core. When it reached the end of the movement, it was evaluated as x.
As a result, the results of ◯ in the examples and × in the comparative examples were obtained. From this, it was found that the displacement movement of the aluminum foil was sufficiently suppressed in the winding core of the example.

The embodiments and examples disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims and includes all modifications and modifications within the scope of claims and in the sense equivalent thereto.

In the embodiment, the flanges 12 of the winding core 10 are provided at both ends of the body portion 11, but they may be provided only at one end portion as shown in FIG. 7A.
Generally, when transporting a storage body 1 for sheet-shaped articles, the storage body 1 is placed in a packaging box having an upper and lower surface, a front-rear surface, and a left-right surface, and the axial direction of the winding core substantially coincides with the vertical direction of the packaging box. Store in parallel in the left-right direction. That is, it is transported in the state of a package of a storage body for sheet-shaped articles, but when the collar 12 of the winding core 10 is provided only at one end of the body 11, the collar 12 is the packaging box. It is preferable to store it so as to be located on the lower surface of the.
During transportation, the sheet-shaped article 20 usually tends to shift toward the lower surface of the packaging box and does not move toward the upper surface due to gravity. Since the flange portion 12 of the winding core 10 is present in the direction of the lower surface of the packaging box, the slipping movement of the sheet-shaped article 20 is prevented.

Further, the shape of the flange portion 12 of the winding core 10 is not limited to the tapered shape of the embodiment, and the sheet-shaped article 20 wound around the outer periphery of the body portion 11 can be prevented from shifting to the end of the winding core 10. It should be.
For example, it may be flange-shaped as shown in FIG. 7 (b), or edge-wound as shown in FIG. 7 (c).
As for the dimensions of the flange portion 12, it is preferable that the maximum diameter thereof is larger than the diameter of the body portion 11 as in the embodiment, but at least the maximum diameter of the flange portion 12 is the same as the diameter of the body portion 11. For example, it can have the effect of preventing the sheet-shaped article 20 from shifting.
In the embodiment, the body portion 11 and the flange portion 12 of the winding core 10 are integrally formed, but they may be integrally formed after being formed as separate bodies.
For example, as shown in FIG. 7B, the flange portion 12 is located concentrically with the collar body 12a having a diameter larger than that of the body portion 11 and the collar body 12a, and is fitted with a diameter substantially equal to the inner diameter of the body portion 11. As it is composed of the portion 12b, it can be integrated by fitting the fitting portion 12b into the open end portion of the body portion 11.
The form of the collar portion 12 is not limited to the embodiment, and the collar portion 12 is formed by using the edge winding technique used for a conventional paper container or synthetic resin container, for example, as shown in FIG. 7 (c). You can also.
The collar portion 12 is not limited to the one formed continuously on the entire circumference of the body portion 11 as in the embodiment, and may have a missing portion of the collar portion 12 on a part of the entire circumference. That is, the flange portion 12 may be formed intermittently or only partially on the entire circumference of the body portion 11.

The method for 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 portion of the raw material having a uniform diameter with a punch P as in the embodiment, and the desired flange portion 12 shape is obtained. It may be molded using a mold or the like.

The shape of the storage case 30 is not limited to the shape of the embodiment as long as the winding core 10 around which the sheet-shaped article 20 is wound can be stored.
For example, the flap 32 and the lock piece 32a can be omitted. Further, a lock piece that can be pushed toward the storage space is provided in the both side surface plates 31c of the case body 31, and the lock piece is pushed in and inserted into the end opening of the winding core 10 to insert the case of the winding core 10 into the case. It is also possible to prevent popping out from the main body 31.

1 Storage body for sheet-shaped articles of the embodiment 10 Winding core 11 of the embodiment 12 collar portion 12a collar body 12b fitting portion 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 collar r Roll diameter of sheet-shaped article L Axial length of body w Width of sheet-like article α Tilt angle S Raw material P Punch t Punch taper G Guide

Claims (8)

A cylindrical body that can wind a sheet-shaped article around the outer circumference and a tubular body that is connected to at least one end of both ends of the body and is tapered from the inner end to the outer end that is connected to the body. A winding core provided with a flange portion that spreads in a shape and prevents the sheet-like article wound around the outer periphery of the body portion from shifting and moving in the direction of the continuous end portion.
The sheet-like article wound only on the body portion of the collar portion and the body portion of the winding core, and the sheet-shaped article.
A winding core in which a sheet-like article is wound up. The winding core around which the sheet-shaped article according to claim 1 is wound , in which the angle formed by the outer circumference of the body portion and the outer circumference of the tapered flange portion is 100 degrees to 150 degrees. The body portion and the collar portion are formed separately, and the body portion and the collar portion are formed separately.
The collar portion has a collar portion main body for preventing the sheet-shaped article from slipping and moving, and a fitting portion that can be fitted into an open end portion of the body portion.
The winding core around which the sheet-shaped article according to claim 1 or 2 is wound , in which the fitting portion is fitted to the end portion of the body portion. The winding core around which the sheet-shaped article according to any one of claims 1 to 3 , wherein the surface roughness of the outer peripheral surface of the body portion is larger than the surface roughness of the inner peripheral surface of the body portion. .. The collar portion is a winding core around which a sheet-shaped article according to any one of claims 1 to 4, which has a missing portion in a part in the circumferential direction of the body portion, is wound. A winding core around which the sheet-shaped article according to any one of claims 1 to 5 is wound, and
A storage body for a sheet-shaped article including a storage case for storing the winding core around which the sheet-shaped article is wound. The maximum diameter of the collar of the winding core is
Larger than the outer diameter of the wound sheet-like article,
In the state of being stored in the storage case
The collar of the winding core can come into contact with the inner surface of the storage case.
The storage body for a sheet-shaped article according to claim 6, wherein the outer peripheral surface of the sheet-shaped article cannot be in contact with the inner surface of the storage case. The winding core is a substantially cylindrical paper tube.
The storage body for the sheet-shaped article according to claim 6 or 7 , wherein the sheet-shaped article is aluminum foil.

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