JPH10217366A - Method of manufacturing core, sheet-wound article with sheet wound therearound, and paper tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sheet member such as aluminum foil form being shifted relative to the axial direction of a core such as a paper tube by forming partially recess parts and projection parts on the outside surface relative to the axial direction of a cylindrical core around which a sheet member is wound. SOLUTION: The paper tube is formed by winding spirally a third belt-like paper 209 different from the third belt-like paper of other paper tube. However, the third belt-like paper 209 is wound spirally at predetermined distances allowing for interstices (for example, a width of 5mm), and the distances form recess parts 203. The recess parts 203 is configured to be depressed for a first step 203a and a second step 203b. Also, a paper tube is available, in which paper having a narrow width of the same as interstices is wound with so many folds as a third layer for forming projection parts and recess parts. Furthermore, a paper is also available, in which a piece of a belt is wound in a ring shape on a cylinder formed by winding belt-like paper spirally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding core, a wound product having a sheet-like member wound thereon, and a method for manufacturing a paper tube as a winding core, and more particularly to a method for manufacturing a paper core in the axial direction of the winding core. The present invention relates to a winding core capable of preventing displacement of a member, a wound product obtained by winding a sheet-like member around the winding core, and a method of manufacturing a paper tube as a winding core.

[0002]

2. Description of the Related Art Referring to FIG. 9, an aluminum foil 107 as a sheet-like member is wound around a paper tube 105 as a winding core and stored in a storage box 101 as a sheet wound product 103. The sheet wound product 103 stored in the storage box 101 is
Distributed for sale. By the way, as shown in FIG. 10, the paper tube 105 has a cylindrical shape, and is manufactured by a Langston machine. Specifically, the first belt-shaped paper is spirally wound around the surface of the columnar member rotating about the axis as a rotation axis without any gap and in a certain direction with respect to the axis, without overlapping. The paper is spirally wound without any gap and overlapped so as to cover the seam of the surface of the first belt-shaped paper in the direction parallel to the winding direction of the first belt-shaped paper with the same paper width, and is adhered to the third belt-shaped paper. The paper 111 is manufactured by being spirally wound without any gap and without overlapping so as to cover the seam of the surface of the belt-shaped paper 109 in the direction parallel to the winding direction of the second belt-shaped paper with the same paper width. Here, the back surface of the second and third strips of paper is coated with a paste containing a large amount of water,
The first, second, and third band-shaped papers are integrated by the glue, and the outer surface is a cylindrical body having a smooth peripheral wall.

[0003]

However, FIG.
The paper tube 105 shown in FIG. That is, the aluminum foil 107 is not always firmly wound around the paper tube 105, and the winding force may not be sufficient. In this case, if any external force is generated in the axial direction during the transportation in the distribution process, the aluminum foil 107 is shifted with respect to the paper tube 105 along the axial direction of the paper tube 105, and a dent is formed at the end. There was a case. Further, the paper tube 105
Since it is manufactured using glue containing a large amount of water, it is highly likely to shrink by drying after the manufacturing. Therefore, when dried, there is a problem that the diameter becomes small and a gap is formed between the aluminum foil 107 and a dent is formed on the end of the aluminum foil 107 in the same manner.

Accordingly, an object of the present invention is to provide a core capable of preventing a sheet-like member such as an aluminum foil from being displaced in an axial direction of a core such as a paper tube. I do. A second object of the present invention is to provide a paper tube capable of solving the same problems as the first object of the present invention.

A third object of the present invention is to provide a paper tube which can solve the same problem as the second embodiment only by using a strip of paper. A fourth object of the present invention is to provide a core which can solve the same problems as those of the first, second or third invention by using a metal foil such as an aluminum foil as the sheet-like member.

A fifth object of the present invention is to provide a sheet wound product which can solve the same problem as any one of the first to fourth inventions. According to a sixth aspect of the present invention, there is provided a paper tube manufacturing method capable of manufacturing a paper tube capable of preventing displacement of a sheet member to be wound in the axial direction with respect to the axial direction of the paper tube as easily as possible. The task is to provide

Another object of the present invention is to provide a manufacturing method capable of manufacturing a paper tube with little change in a conventionally used technique.

[0008]

According to the first aspect of the present invention, there is provided a cylindrical winding core on which a sheet-like member is wound, and a concave portion or a concave portion formed on a part of an outer surface with respect to an axial direction. It is characterized by having a convex portion. By providing such a concave portion or a convex portion, even when the sheet-shaped member is weakly wound around the core, the sheet-shaped member cuts into a step of the concave portion or the convex portion, and thus the axial direction is reduced. Deviation can be prevented.

A second aspect of the present invention is characterized in that the core of the first aspect includes a paper tube. According to such an invention, even when the paper tube dries and shrinks, the sheet-like member can bite into the step of the concave portion or the convex portion, and the displacement in the axial direction can be prevented. According to a third aspect of the present invention, the concave portion provided in the paper tube according to the second aspect has a gap formed by spirally winding band-shaped paper around the surface of a cylindrical body having a smooth peripheral wall made of paper with a predetermined gap therebetween. It is characterized by including. The same effect as the operation of the second aspect of the invention can be obtained by the gap as the concave portion formed by winding such a band-shaped paper.

According to a fourth aspect of the present invention, the sheet member according to any one of the first to third aspects includes a metal foil such as an aluminum foil. The axial displacement can be prevented even with respect to a metal foil such as an aluminum foil in which dents are likely to occur. According to a fifth aspect of the present invention, there is provided a sheet-wound product in which a sheet-like member is wound around the core of any one of the first to fourth aspects. Even if such a sheet-wound product is subjected to an external force in the axial direction of the winding core due to, for example, some kind of impact during distribution, it is possible to prevent the sheet-shaped member from shifting.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a cylindrical body by winding paper around a surface of a cylindrical member rotating about an axis as a rotation axis, and forming a belt-like shape on the surface of the rotating cylindrical body. And spirally winding and bonding the paper while leaving a gap at a predetermined interval. By such a manufacturing method, a concave portion due to a gap is easily formed on the outer surface of the paper tube.

According to a seventh aspect of the present invention, in the step of manufacturing the cylindrical body, the first band-shaped paper is formed on the surface of the rotating cylindrical member without any gap and without overlapping with respect to the axis. Spirally wrapping in a first direction, a second band-shaped paper parallel to the first direction without gaps and without overlapping on the surface of the first band-shaped paper being wound and rotating. Spirally wrapping and bonding in a second direction, wherein the band-shaped paper wound and adhered to the surface of the rotating cylinder is narrower than the width of the second band-shaped paper. It is characterized in that it includes a third strip of paper having a width and is spirally wound in a direction parallel to the second direction. With such an invention,
In the process of manufacturing the cylindrical body, the same technology as that of the related art can be used. By simply reducing the width of the third band-shaped paper, a paper tube having a concave portion formed by a gap on the outer surface can be manufactured. Here, the expression that the winding directions are parallel means that the ends of the band-shaped paper may be parallel as a result of the winding, and the winding start position does not matter.

[0013]

According to the first aspect of the present invention, since the deviation of the sheet member in the axial direction can be prevented by the concave portion or the convex portion of the core, a dent at the end of the sheet member caused by the deviation is less likely to occur. Benefits are obtained. As a result, the commercial value of the sheet member does not need to be reduced. According to the second aspect of the invention, even when the winding core is a paper tube, the same effects as those of the first aspect can be obtained even when the winding force is weak or when the core is dried and contracted.

According to the third aspect of the present invention, a gap as a concave portion can be formed only by the band-shaped paper, and the same effect as that of the second aspect can be obtained by this gap. The invention of claim 4 is
Even when a metal foil such as an aluminum foil is used as the sheet-like member, the same effect as the effect of any one of the first to third aspects of the invention is obtained, and a reduction in commercial value of the metal foil can be prevented.

According to the invention of claim 5, even in the case of a sheet-wound product in which a sheet-like member is wound around a core, a dent is unlikely to be formed on the sheet-like member, thereby preventing a reduction in commercial value as a sheet-wound product. it can. According to the sixth aspect of the present invention, a gap that can be a concave portion can be formed by using a conventionally used technique of spirally winding a strip of paper,
A paper tube having a concave portion can be made by a simple manufacturing process.

According to a seventh aspect of the present invention, a conventional process can be used for the step of manufacturing the cylindrical body, and only the width of the third belt-like paper forming the gap for the concave portion is reduced. Thus, a gap that becomes a concave portion can be formed, and the paper tube can be manufactured with little change of the apparatus, so that simple and inexpensive manufacturing can be performed.

[0017]

FIG. 1 is a perspective view of a paper tube according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG.
FIG. 3 is a schematic view showing a Langston machine for manufacturing the paper core of FIG. 1. Referring mainly to FIG. 1 to FIG.
A third band-shaped paper 209 (for example, having a thickness of 0.17 mm and a width of 50 mm) different from the third band-shaped paper 111 of the paper tube 105 of FIG.
mm, and a liner paper having a basis weight of 130 g / m ² ). That is, the first band-shaped paper and the second band-shaped paper of FIG.
(For example, an example thickness of 0.32 mm, width of 55 mm, basis weight of 2
50 g / m ² paper tube base paper) and a second belt-shaped paper 207 (for example, a thickness of 0.21 mm, a width of 55 mm, and a basis weight of 170)
g / m ² of liner paper), on which a third band-shaped paper 209 is wound as a third layer. However, the third band-shaped paper 209 has a gap (for example, a width of 5 mm).
It is wound spirally at a predetermined interval so that the gap is formed, and the gap forms the recess 203. Recess 203
The first step 203 a and the second step
Is recessed by the height of the step 203b.

Next, the manufacturing process will be described in more detail with reference to FIG. The difference between the Langston machine 211 and the conventional one is that the third band-shaped paper 209 having a small width is wound. That is, the columnar member 215 supported by the support base 213 is rotated about the axis of rotation by the belt 217, and the first band-shaped paper 205 as the first layer is interposed between the belt 217 and the columnar member 215. It is spirally wound around the surface of the cylindrical rotating member 215 while being sandwiched. The spiral winding is performed without a gap and without overlapping, as described in the related art. Then, after the first band-shaped paper 205 is wound, the second band-shaped paper 207 having the back surface coated with glue by the glue box 208 is provided.
Are spirally wound around the surface of the first band-shaped paper 205 in the direction parallel to the winding direction of the first band-shaped paper 205 with the same paper width so as to cover the joint of the first band-shaped paper 205. Here, the term "parallel winding direction" means that the end of the band-shaped paper is parallel as a result of the winding, as shown in FIG. 3, and it does not matter where the winding starts. The winding is performed without gaps and without overlapping, and is further performed so as to cover the joint of the first belt-shaped paper 205. Then, after the second band-shaped paper 207 is wound, the third box whose back is coated with the glue by the glue box 210 is formed.
Is spirally wound around the surface of the second band-shaped paper 207 in a direction parallel to the winding direction of the second band-shaped paper 207 so as to cover the joint of the second band-shaped paper 207. Can be As described above, the winding is performed at predetermined intervals so that a gap is formed between the third strips of paper 209, and is further performed so as to cover the joint of the second strip of paper 207.

The predetermined interval is set according to the second band-shaped paper 20.
7, the paper width L2 of the third band-shaped paper 209 with respect to the paper width L1 of
, The angle α1 of the second band-shaped paper 207 with respect to the axis of the columnar member 215 and the third band-shaped paper 209.
Is made parallel to the same angle α2 with respect to the axis of the columnar member 215. That is, the third band-shaped paper 209 has a concave portion 20 as compared with the second band-shaped paper 207.
The gap is formed by narrowing the width by the gap of 3.

Therefore, in the Langston machine 211 for manufacturing the paper tube 201 according to the present invention, the width of the third-layer band-shaped paper is simply reduced, and the subsequent technology is used. Columnar member 2 of second band-shaped paper 207
15 and the angle α2 of the third band-shaped paper 209 with respect to the columnar member 215 are the same, and there is no need to change the angle in another step to form a gap, and the adjustment of the apparatus is easy. It has become something. Therefore, the recess can be formed easily and inexpensively by the Langston machine 211.

In addition, such a Langston machine 21
In the case where the aluminum foil 206 is wound around the paper tube 201 manufactured by the method described in FIG. 1, for example, even if the winding force is weak in the distribution process, if the aluminum foil 206 moves to the left in FIG. If the step 203a of the concave portion 203 is to be shifted to the right side, the second step 203b of the concave portion 203
, The displacement of the paper tube 201 in the axial direction can be prevented. Also, as can be seen from the manufacturing method in FIG. 3, a glue containing a large amount of water is used for bonding the second belt-shaped paper 207 and the third belt-shaped paper 209, and the paper tube 201 shrinks by drying. Occurs, and even if the diameter becomes small and the aluminum foil 206 is likely to be displaced from the paper tube 201, the displacement is prevented by the concave portion 203.

In particular, when the aluminum foil to be wound and the paper tube 201 have different widths, that is, in the case of a sheet wound product as shown in FIG. 9, the paper tube 105 exerts an external force. When it is received, the aluminum foil 107 is easily shifted in the axial direction with respect to the paper tube 201 due to its inertia force, so that it is particularly effective in the case of such a sheet wound product. As another example of the paper tube, as shown in FIG. 4, a paper in which the convex portions 221 are formed by overlapping the ends by using a wide band-shaped paper as the third band-shaped paper of the third layer. It may be a tube 219.

As another example of a paper tube, as shown in FIG. 5, a strip of paper having the same width as the gap is spirally wound as a third layer into a plurality of layers to form a convex portion 225a and a concave portion 225b. May be formed in the paper tube 223. Furthermore, as shown in FIG. 6, a tubular body formed by spirally winding a belt-like paper is formed.
Paper tube 22 in which one belt is wound in a ring shape to form a convex portion 229
7 is acceptable.

Further, as shown in FIG. 7, a paper tube 231 having projections 233a to 235c and projections 235a to 235c provided on a cylindrical body formed by spirally winding a strip of paper. There may be. Further, as shown in FIGS. 8 (a), 8 (b) and 8 (c) (FIG. 8 (b) is an AA line end view of FIG. 8 (a), and FIG. 239a is an enlarged perspective view of the periphery of the cylindrical body.), Or a paper tube 237 in which concave portions 239a and 239b are formed in holes that penetrate the outer surface and the inner surface of the cylindrical body.

Further, the third band-shaped paper 209 in FIG. 3 is set to L1 having the same width as the second band-shaped paper 207, and the angle α2 with respect to the columnar rotating member 215 is changed to α1 in a separate step to reduce the gap. It may be formed. Further, the paper tube need not have three layers, but may have two layers. For example, the first layer may be formed by spirally winding a strip of paper to form a cylindrical body, or may be formed by laminating long sides of a rectangle.

Further, although the third layer of band-shaped paper in FIG. 4 is wound so as to overlap, the first and second layer of band-shaped paper may be overlapped to form a cylindrical body. Further, from the manufacturing process, it is preferable that the first-layer, second-layer, and third-layer band-shaped papers are all wound in the same direction. The second layer of the band-shaped paper may be wound in parallel to form a cylindrical body, and the third layer of the band-shaped paper may be wound in a crossing direction in a separate step, and the winding direction of each band-shaped paper is not limited.

Further, from the viewpoint of covering the seam of the first band-shaped paper of the first layer with the second band-shaped paper of the second layer, the phase is shifted by the same width and the same angle with respect to the axis. Although it is preferable that they are in a parallel state, they do not have to be the same width or need not be in a parallel state. However, in this case, the first layer and the second layer are formed in separate steps. This also means that the second
The same applies to the relationship between the first layer and the third layer of the band-shaped paper, and the first layer and the third layer of the band-shaped paper. The third layer does not necessarily need to cover the joint.

Furthermore, the adhesion of the second and third layers is not limited to glue. Further, from the viewpoint of preventing the core from shifting in the axial direction, the core does not necessarily need to be contracted, and can be prevented from shifting even when the winding force on the core is weak. May be. Further, the sheet-like member wound around the core is not limited to the aluminum foil, but may be any other metal foil as long as it can be displaced in the axial direction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a paper tube as a core according to an embodiment of the present invention.

FIG. 2 is a partially enlarged end view taken along line II-II of FIG. 1;

FIG. 3 is a schematic view of a Langston machine for manufacturing the paper tube of FIG. 1;

FIG. 4 is a diagram showing another paper tube according to the embodiment of the present invention.

FIG. 5 is a diagram showing still another paper tube according to the embodiment of the present invention.

FIG. 6 is a view showing still another paper tube according to the embodiment of the present invention.

FIG. 7 is a view showing still another paper tube according to the embodiment of the present invention.

FIG. 8 is a view showing still another paper tube according to the embodiment of the present invention.

FIG. 9 is an exploded perspective view of a paper tube wound with aluminum foil and a storage box.

FIG. 10 is a view showing the paper tube of FIG. 9;

[Explanation of symbols]

201, 219, 223, 227, 231, 237 ...
-Paper core 203, 225b, 239a, b ... concave parts 221, 225a, 229, 233a-c, 235a-
c ... convex part 205 ... first band-shaped paper 207 ... second band-shaped paper 209 ... third band-shaped paper 215 ... cylindrical member 206 ... aluminum foil

Claims (7)

[Claims] 1. A core comprising a cylindrical core on which a sheet-shaped member is wound, the core comprising a concave portion or a convex portion formed on a part of an outer surface with respect to an axial direction. 2. The core according to claim 1, wherein the core includes a paper tube. 3. The concave portion provided in the paper tube includes the gap formed by spirally winding a strip of paper around a surface of a cylindrical body having a smooth peripheral wall made of paper with a predetermined gap therebetween. Item 2. The core according to Item 2. 4. The core according to claim 1, wherein the sheet-like member includes a metal foil such as an aluminum foil. 5. A sheet wound product in which a sheet member is wound around the core according to any one of claims 1 to 4. 6. A step of winding a sheet of paper around a cylindrical member rotating about an axis as a rotation axis to produce a cylindrical body, and forming a band of paper on a surface of the rotating cylindrical body at a predetermined interval. Spirally winding and bonding while leaving a gap. 7. The step of manufacturing the cylindrical body includes the steps of: placing a first band-shaped paper on the surface of the rotating cylindrical member without a gap and without overlapping the first band-shaped paper with respect to the axis;
Spirally winding in the direction of the first belt-shaped paper, the second belt-shaped paper parallel to the first direction, without gaps and without overlapping on the surface of the first belt-shaped paper being wound and rotating Spirally wrapping and bonding in a direction, wherein the band-shaped paper wound and adhered to the surface of the rotating cylindrical body has a third width smaller than the width of the second band-shaped paper. 7. The method for manufacturing a paper tube according to claim 6, wherein the paper tube is wound spirally in a direction parallel to the second direction.