JP7056578B2 - Roll body - Google Patents

Description

The present disclosure relates to rolls.

The transfer foil comprises, for example, a sheet comprising a pattern layer having a predetermined shape and a support layer that supports the pattern layer, and such transfer foil may be manufactured using a roll-to-roll method (eg, for example). See Patent Document 1). In the process of manufacturing a transfer foil, in order to store the transfer foil during the production of the transfer foil or when the transfer foil is completed, or to move the intermediate of the transfer foil from one device to another. , Transfer foil or sheet of intermediate is wound around the core.

Japanese Unexamined Patent Publication No. 2013-144440

The sheet has a band shape extending along the extending direction, and is wound around the winding core along the circumferential direction of the winding core. When the pattern layer of the sheet has a first region having a linear shape extending along the extending direction and a second region having a linear shape extending along the extending direction and being thinner than the first region. There is. When such a sheet is wound around the winding core, the portion of the winding core around which the first region is wound and the portion around which the second region is wound are fixed in the axial direction, that is, do not change. As a result, the roll body is formed with a thick portion and a thin portion along the radial direction of the winding core in the axial direction of the winding core. As a result, wrinkles are formed on the sheet due to the difference in thickness between different portions in the axial direction, and the yield of the transfer foil is lowered.

It should be noted that these problems are not limited to the sheet provided by the transfer foil, but also a roll body provided with a winding core and a sheet wound around the outer peripheral surface of the winding core along the circumferential direction of the winding core, and after being wound around the winding core. , Common to rolls with a sheet from which the core has been removed.
It is an object of the present disclosure to provide a roll body capable of suppressing the occurrence of wrinkles in a sheet after being wound around a winding core.

The roll body for solving the above-mentioned problems includes a sheet which is a multi-layered body wound so as to have a cylindrical shape extending along the axial direction, and the sheet is extended in a state where the sheet is spread out. It has a band shape that extends along the direction. The direction orthogonal to the extending direction is the width direction, and the sheet includes a pattern division region composed of a plurality of first regions and a plurality of second regions. Each of the first regions and the second regions has a band shape extending along the first direction and includes an edge along the first direction, and the edges are in the extending direction and the width direction. It has a shape that extends along the direction in which it intersects both. In the pattern division region, the first region and the second region are alternately arranged side by side. The sheet is composed of a support layer and a pattern structure supported by the support layer. In the roll body, the density of the element pattern structure in the first region is different from the density of the element pattern structure in the second region, and the arrangement of the element pattern structure in the first region is an element in the second region. Satisfy at least one of the different arrangements of the pattern structure.

According to the above configuration, the edge of the first region and the edge of the second region extend along a direction intersecting both the extending direction and the width direction, respectively, and the first region and the second region are formed. Since the winding cores are arranged alternately, the portion around which the edge of the first region is wound and the portion around which the edge of the second region is wound are not fixed in the axial direction. Therefore, at the boundary between the first region and the second region, the difference in thickness along the radial direction of the winding core is easily alleviated, and the thickness along the radial direction of the winding core is abrupt in the axial direction of the winding core. It is suppressed to change to. As a result, wrinkles are suppressed in the sheet wound around the core.

The roll body for solving the above-mentioned problems includes a sheet which is a multi-layered body wound so as to have a tubular shape extending along the axial direction, and the sheet is in a extending direction in a state where the sheet is spread out. It has a band shape extending along the. The sheet includes a pattern division region composed of a plurality of first regions and a plurality of second regions, and each of the first regions and the second regions has a shape extending along a first direction. Have. In the pattern division region, the first region and the second region are alternately arranged side by side. Each of the first regions includes an edge along the first direction, and the position of the edge of each of the first regions in the circumferential direction of the sheet changes continuously along the axial direction. The sheet is composed of a support layer and a pattern structure supported by the support layer, and the pattern structure is composed of a plurality of element pattern structures forming convex portions on the surface of the sheet. In the roll body, the density of the element pattern structure in the first region is different from the density of the element pattern structure in the second region, and the arrangement of the element pattern structure in the first region is an element in the second region. Satisfy at least one of the different arrangements of the pattern structure.

According to the above configuration, the position of the edge of the first region in the circumferential direction of the winding core changes continuously along the axial direction, in other words, in the winding core, the portion where the edge of the first region is wound and the second. The part around which the edge of the region is wound is not fixed in the axial direction. Therefore, at the boundary between the first region and the second region, the difference in thickness along the radial direction of the winding core is easily alleviated, and the thickness along the radial direction of the winding core suddenly increases in the axial direction of the winding core. Change is suppressed. Therefore, it is possible to prevent wrinkles from forming on the sheet wound around the core.

In the roll body, the roll body extends along the axial direction and further includes a winding core having an outer peripheral surface, and the sheet may be wound along the outer peripheral surface of the winding core. According to the above configuration, since the sheet is supported by the winding core, the shape of the sheet does not change easily.

In the roll body, the first direction may intersect both the extending direction and the width direction.

According to the above configuration, the first region and the second region extend along the first direction intersecting both the extending direction and the width direction, respectively, and the first region and the second region alternate. Therefore, in the winding core, the portion around which the edge of the first region is wound and the portion around which the edge of the second region is wound are not fixed in the axial direction. Therefore, in the axial direction of the winding core, the variation in thickness along the radial direction of the winding core can be suppressed. As a result, wrinkles are suppressed in the sheet wound around the core.

In the roll body, the position of each of the first regions in the circumferential direction of the winding core may be continuously changed along the axial direction.

According to the above configuration, the position of the first region in the circumferential direction of the winding core changes continuously along the axial direction. In other words, in the winding core, the portion around which the first region is wound and the portion around which the second region is wound are not fixed in the axial direction. Therefore, it is possible to suppress variations in thickness along the radial direction of the winding core in the axial direction of the winding core between the first region and the second region. Therefore, it is possible to prevent wrinkles from forming in the sheet wound around the core.

In the roll body, the element pattern structure may be located only in the first region. According to the above configuration, in the configuration in which the density of the element pattern structure in the second region is the minimum, wrinkling is suppressed in the sheet wound around the winding core.

In the roll body, the element pattern structure may have a band shape having a predetermined thickness over the entire first region.

According to the above configuration, in a configuration in which the element pattern structures forming the convex portions are arranged with a gap in the arrangement direction, wrinkles are suppressed on the sheet wound around the winding core.

The roll body includes the pattern structure and includes a pattern layer which is a concavo-convex structure supported by the support layer, and the first region is a thick portion of the pattern layer including the element pattern structure. The second region may be a thin portion of the pattern layer that does not include the element pattern structure.

According to the above configuration, in a configuration in which both the first region and the second region include a part of the pattern layer having a predetermined thickness, wrinkling is suppressed on the sheet wound around the winding core.

In the roll body, the pattern structure may include two or more types of the element pattern structures having different shapes in a plan view facing the plane on which the sheet spreads.

According to the above configuration, the shape of the pattern structure can be complicated as compared with the configuration in which all the element pattern structures have the same shape.

In the roll body, the plurality of element pattern structures may have the same shape as each other in a plan view facing the plane on which the sheet spreads.

According to the above configuration, even if all the element pattern structures have the same shape, wrinkles can be suppressed on the sheet wound around the winding core.

In the roll body, the pattern structure includes a plurality of element pattern structure groups, each element pattern structure group is composed of the plurality of element pattern structures, and each of the first region and each second region is composed of the plurality of element pattern structures. The number of the element pattern structures including the element pattern structure group and belonging to each of the first regions and the number of the element pattern structures belonging to each of the second regions may be different from each other.

According to the above configuration, since not only the first region but also the second region includes the element pattern structure group, the plan view facing the plane on which the sheet spreads is compared with the configuration in which only the first region includes the element pattern structure group. The shape of the pattern structure of is more complicated.

The roll body for solving the above-mentioned problems includes a sheet which is a multi-layered body wound so as to have a cylindrical shape extending along the axial direction, and the sheet is in a extending direction in a state where the sheet is spread out. It has a band shape extending along the. The sheet includes a support layer and a plurality of element pattern structure groups formed on the surface of the sheet and periodically arranged along the extending direction. Each element pattern structure group is composed of a plurality of element pattern structures supported by the support layer to form a convex portion on the surface of the sheet. By surrounding a collection of the plurality of element pattern structures constituting one element pattern structure group with an envelope contour line tangent to a part of the edge of each element pattern structure in a plan view facing the plane on which the sheet spreads. The area to be partitioned is the element pattern structure group area. The line parallel to the extending direction is the reference line, and the direction orthogonal to the extending direction is the width direction. The length from one end of the element pattern structure group region in the width direction to the reference line changes periodically along the extending direction.

According to the above configuration, the length from at least one end in the width direction to the reference line parallel to the extension direction in the element pattern structure group region changes periodically along the extension direction. In the end of the element pattern structure group region in the width direction, the position of the end changes periodically in the axial direction of the winding core at the end where the length between the element pattern and the reference line changes periodically. Therefore, wrinkles are suppressed in the sheet wound around the winding core as compared with the configuration in which the position of the end portion of the sheet in the axial direction of the winding core does not change.

In the roll body, the convex portion includes at least one prism group in which a plurality of prisms having a linear or arc shape are connected along one direction in a plan view facing a plane on which the sheet spreads. The prism may be an asymmetric prism having different inclination angles on both sides of the apex in a cross section along the width direction of the sheet.

According to the above configuration, in the winding core, the portion around which the first region is wound and the portion around which the second region is wound are not fixed in the axial direction, so that there are a plurality of element pattern structures located in the first region. Even if the prism is included, the deformation of the prism due to winding the sheet around the winding core can be suppressed.

According to the present disclosure, wrinkles are suppressed in the sheet after being wound around the core.

The perspective view which shows the structure in the roll body of 1st Embodiment. A partial plan view showing a part of the structure in the sheet provided by the roll body. FIG. 2 is a cross-sectional view showing a structure along the line II-II of FIG. The cross-sectional view which shows the structure orthogonal to the axial direction of a winding core. The cross-sectional view which shows the structure orthogonal to the axial direction of a winding core. The cross-sectional view which shows the structure orthogonal to the axial direction of a winding core. FIG. 2 is a cross-sectional view showing a structure along the line I-I of FIG. The perspective view which shows the structure in the roll body of the comparative example. A partial plan view showing a part of the structure in the sheet provided in the roll body of the comparative example. FIG. 6 is a cross-sectional view showing a structure along the line III-III of FIG. The cross-sectional view which shows the structure of the sheet in the modification. A partial plan view showing a part of the structure of the sheet in the modified example. A partially enlarged plan view showing a partial structure of a sheet in a modified example in an enlarged manner. A partially enlarged cross-sectional view showing a partial structure of the element pattern structure in the modified example in an enlarged manner. A partial plan view showing a partial structure of a sheet in a modified example in an enlarged manner. A partially enlarged cross-sectional view showing a partial structure of the element pattern structure in the modified example in an enlarged manner. A partial plan view showing a partial structure of a sheet in a modified example in an enlarged manner. A partially enlarged cross-sectional view showing a partial structure of the element pattern structure in the modified example in an enlarged manner. A partial plan view showing a part of the structure in the sheet provided in the first example of the roll body of the second embodiment. A partial plan view showing a part of the structure in the sheet provided in the second example of the roll body. A partial plan view showing a part of the structure in the sheet provided in the third example of the roll body. A partial plan view showing a part of the structure in the sheet provided in the fourth example of the roll body. A partial plan view showing a part of the structure in the sheet provided in the fourth example of the roll body. A partial plan view showing a part of the structure in the sheet provided in the fifth example of the roll body.

[First Embodiment]
A first embodiment in which a roll body is embodied will be described with reference to FIGS. 1 to 10. In the following, the configuration of the roll body, the action of the roll body, and the roll body of the comparative example will be described in order.

[Structure of roll body]
The configuration of the roll body will be described with reference to FIGS. 1 to 6. In addition, in FIGS. 1 and 2, dots are added to the first region for the purpose of easily distinguishing the first region from the second region.

As shown in FIG. 1, the roll body 10 includes a winding core 11 and a sheet 12. The winding core 11 extends along the axial direction and has an outer peripheral surface 11S. The sheet 12 has a strip shape extending along the extending direction D1 and is wound around the outer peripheral surface 11S along the circumferential direction DC of the winding core 11. In the roll body 10, since the sheet 12 is supported by the winding core 11, the shape of the sheet 12 is unlikely to change.

In other words, the sheet 12 is a multilayer body wound so as to have a cylindrical shape extending along the axial direction. Although the roll body 10 is composed of the winding core 11 and the sheet 12, it may be composed of only the sheet 12. In this case, the winding core 11 is removed from the sheet 12 after the sheets 12 are wound. At this time, the space partitioned by the sheet 12 is a winding core space.

The winding core 11 has a cylindrical shape and rotates about the rotation axis A. The extending direction of the rotation axis A is the axial direction. The axial direction is also the direction in which the tubular sheet 12 extends. The direction of rotation about the rotation axis A along the outer peripheral surface 11S of the winding core 11 is the circumferential direction DC of the winding core 11. The circumferential direction DC is also a direction along the outer peripheral surface of the sheet 12. The sheet 12 is wound on the outer peripheral surface 11S of the winding core 11 a plurality of times.

As shown in FIG. 2, the direction orthogonal to the extending direction D1 is the width direction D2. In the unfolded state of the sheet 12, the sheet 12 has a band shape extending along the extending direction D1 and the width direction D2, and the length of the sheet 12 along the extending direction D1 is larger than the length along the width direction D2. Is also significantly longer.

The sheet 12 includes a pattern division region 12P composed of a plurality of first regions 12A and a plurality of second regions 12B. Each first region 12A and each second region 12B are strip-shaped regions extending along the first direction, and each strip-shaped region extends along a direction intersecting both the extending direction D1 and the width direction D2. It has a shape. In other words, each band-shaped region has a linear shape extending along a direction that intersects both the extending direction D1 and the width direction D2 at an angle other than a right angle. The extending direction of each band-shaped region is the direction in which the straight line connecting the start point and the end point of the band-shaped region extends. The first direction intersects the extending direction D1 and the width direction D2.

In the plurality of strip-shaped regions, the first region 12A and the second region 12B are arranged side by side alternately along the arrangement direction. The first region 12A and the second region 12B are in contact with each other in the arrangement direction. The arrangement direction in which the first region 12A and the second region 12B are arranged may be one direction in the plane on which the sheet 12 spreads.

In a plan view facing the plane on which the sheet 12 extends, the length along the direction orthogonal to the direction in which the first region 12A extends is the width of the first region 12A. In a plan view facing the plane on which the sheet 12 extends, the length along the direction orthogonal to the direction in which the second region 12B extends is the width of the second region 12B. The width of the first region 12A is smaller than the width of the second region 12B, but the width of the first region 12A may be larger than the width of the second region 12B, and the width of the first region 12A and the second region. The widths of 12B may be equal to each other.

As shown in FIG. 3, the sheet 12 is composed of a support layer 21 and a pattern structure 22. The pattern structure 22 is supported by the support layer 21, and the pattern structure 22 is composed of a plurality of element pattern structures 22a forming convex portions on the surface 12S of the sheet 12. In the sheet 12, the density of the element pattern structure 22a in the first region 12A is different from the density of the element pattern structure 22a in the second region 12B.

In the sheet 12, the surface of the element pattern structure 22a and the portion of the surface of the support layer 21 that is not covered by the element pattern structure 22a constitute the surface 12S of the sheet 12, which is an uneven surface. The ratio of the area of the element pattern structure 22a belonging to the first region 12A to the area of each first region 12A in the plan view facing the plane on which the sheet 12 extends is the ratio of the area of the element pattern structure 22a in each first region 12A. The density. Further, in a plan view facing the plane on which the sheet 12 spreads, the ratio of the area of the element pattern structure 22a belonging to the second region 12B to the area of each second region 12B is the ratio of the area of the element pattern structure 22a in each second region 12B. The density is 22a.

The pattern structure 22 includes a plurality of element pattern structures 22a, and each first region 12A has an element pattern structure 22a different from the element pattern structure 22a constituting the other first region 12A among the plurality of element pattern structures 22a. Includes. The support layer 21 includes a plurality of support portions 21a, and each strip-shaped region includes a support portion 21a different from the support portion 21a constituting another strip-shaped region among the plurality of support portions 21a.

Each of the first region 12A and the second region 12B extends along a direction intersecting both the extending direction D1 and the width direction D2, and the first region 12A and the second region 12B are alternately arranged. Therefore, in the winding core 11, the portion around which the first region 12A is wound and the portion around which the second region 12B is wound are not fixed in the axial direction, that is, change. Therefore, even if the densities of the element pattern structures 22a differ between the first region 12A and the second region 12B, the thickness varies along the radial direction of the winding core 11 in the axial direction of the winding core 11. It can be suppressed. As a result, wrinkles are suppressed on the sheet 12 wound around the core 11.

Each of the support layer 21 and the pattern structure 22 may have a single-layer structure composed of one layer, or may have a multi-layer structure composed of a plurality of layers. When the support layer 21 and the pattern structure 22 have a multi-layer structure, the plurality of layers constituting the multi-layer structure may include layers formed of different materials from each other. In other words, each element pattern structure 22a constituting the pattern structure 22 may have a single-layer structure composed of one layer or a multilayer structure composed of a plurality of layers.

The element pattern structure 22a is located only in the first region 12A. Therefore, in the configuration in which the density of the element pattern structure 22a in the second region 12B is the minimum, it is possible to suppress the variation in the thickness of the winding core 11 in the sheet 12 along the radial direction.

In the first region 12A, the element pattern structure 22a has a band shape having a predetermined thickness over the entire first region 12A. Therefore, in a configuration in which the element pattern structures 22a forming the convex portions are arranged with a gap in the arrangement direction, wrinkles are suppressed on the sheet 12 wound around the winding core 11.

More specifically, each element pattern structure 22a has a linear shape extending in the same direction as the first region 12A to which the element pattern structure 22a belongs, that is, along a direction intersecting both the extending direction D1 and the width direction D2. ing. The element pattern structure 22a has substantially the same thickness over the entire first region 12A.

A recess 22b over the entire second region 12B is formed between the two element pattern structures 22a adjacent to each other in the arrangement direction. Each recess 22b has a linear shape extending in the same direction as the second region 12B, that is, in a direction intersecting both the extending direction D1 and the width direction D2. As described above, between the first region 12A and the second region 12B, the first region 12A has the element pattern structure 22a, while the second region 12B does not have the element pattern structure 22a. Therefore, the density of the element pattern structure 22a is different between the first region 12A and the second region 12B.

Each of FIGS. 4 to 6 shows an example of the cross-sectional structure of the roll body 10 along the plane orthogonal to the axial direction of the winding core 11. Each of FIGS. 4 to 6 shows the cross-sectional structure of the roll body 10 in the portions where the positions in the axial direction are different from each other. In addition, each of FIGS. 4-6 shows a cross-sectional structure containing different portions in the same first region 12A. Further, in FIGS. 4 to 6, for convenience of illustration, the sheet 12 is shown by one circle, and one first region 12A is shown so as to be located on the outermost layer of the sheet 12 wound around the winding core 11. There is.

The sheet 12 of the roll body 10 described above also has the following configuration. That is, the sheet 12 includes a pattern division region 12P composed of a plurality of first regions 12A and a plurality of second regions 12B, and each first region 12A and each second region 12B are in the first direction. It has a shape that extends along it. In the pattern division region 12P, the first region 12A and the second region 12B are alternately arranged side by side. The position of each first region 12A in the circumferential direction DC of the winding core 11 changes continuously along the axial direction.

FIG. 4 shows the cross-sectional structure of the roll body 10 at the first position in the axial direction.
As shown in FIG. 4, the first portion 12A1 of the first region 12A is located at the first position in the axial direction of the roll body 10. The first portion 12A1 is located at a predetermined portion of the sheet 12 in the circumferential direction DC of the winding core 11. The first portion 12A1 is located, for example, directly above the rotation axis A at the first position in the axial direction.

In the circumferential direction DC of the winding core 11, a point that is one point on the outer peripheral surface 11S of the winding core 11 and is located directly above the rotating shaft A is set as a reference point P, and the rotating shaft that is the center of the winding core 11 is set. A straight line extending from A toward the reference point P is set as the reference line LB. The phase is the angle formed by the reference line LB and the straight line L connecting a predetermined point on the outer peripheral surface 11S of the winding core 11 and the rotation axis A. The phase in the first portion 12A1 is 0 °.

FIG. 5 shows the cross-sectional structure of the roll body 10 at the second position in the axial direction and at a position different from the first position.

As shown in FIG. 5, in the roll body 10, the second portion 12A2 of the first region 12A is located at the second position in the axial direction. The second portion 12A2 is located in a predetermined portion of the sheet 12 in the circumferential direction DC of the winding core 11 and different from the portion in which the first portion 12A1 is located. That is, the first portion 12A1 and the second portion 12A2 have different phases in the circumferential direction DC. The phase of the second portion 12A2 is α ° different from the phase of the first portion 12A1.

FIG. 6 shows the cross-sectional structure of the roll body 10 at the third position in the axial direction, which is different from the first position and the second position. In the axial direction, the second position is sandwiched between the first position and the third position.

As shown in FIG. 6, the third portion 12A3 of the first region 12A is located at the third position in the axial direction of the roll body 10. The third portion 12A3 is a predetermined portion of the sheet 12 in the circumferential direction DC of the winding core 11 and is different from the portion where the first portion 12A1 is located and the portion where the second portion 12A2 is located. positioned.

That is, the phase of the third portion 12A3 is different from both the phase of the first portion 12A1 and the phase of the second portion 12A2. The phase of the third portion 12A3 is β ° different from the phase of the first portion 12A1 and is also an angle different from α ° which is the phase of the second portion 12A2.

As described above, since each first region 12A in the sheet 12 is spirally wound around the outer peripheral surface 11S of the winding core 11, the phase of the winding core 11 in the circumferential direction DC in the first region 12A is axial. It changes continuously along. In other words, in the winding core 11, the portion around which the first region 12A is wound and the portion around which the second region 12B is wound are not fixed in the axial direction.

Therefore, even if the density of the element pattern structure 22a in the first region 12A and the density of the element pattern structure 22a in the second region 12B are different from each other, in the roll body 10, in the axial direction of the winding core 11, the radial direction of the winding core 11 The variation in thickness along the line is suppressed. Therefore, it is possible to prevent wrinkles from forming on the sheet 12 wound around the core 11.

[Action of roll body]
The operation of the roll body 10 will be described with reference to FIG. 7.
FIG. 7 shows a cross section of the roll body 10 along a surface extending along the rotation axis A of the winding core 11. In FIG. 7, for convenience of illustration, the thickness of the support layer 21 and the thickness of the element pattern structure 22a included in the pattern structure 22 are exaggerated.

As shown in FIG. 7, in the sheet 12 wound around the winding core 11, the position of the first region 12A in the axial direction DA of the winding core 11 changes in the radial DR position of the winding core 11. It changes continuously with. Further, in the axial DA of the winding core 11, the portion where the second region 12B is located changes continuously as the position of the winding core 11 in the radial DR changes.

Therefore, in the roll body 10, the portion where the first region 12A is located in the axial direction DA and the portion where the second region 12B is located in the axial direction DA are not fixed. Therefore, even if the thickness of the first region 12A and the thickness of the second region 12B are different, the difference between the thickness of the first region 12A and the thickness of the second region 12B is not fixed in the axial DA. As a result, in the axial DA of the roll body 10, variation in thickness along the radial DR is suppressed, and as a result, wrinkles are suppressed in the sheet 12 due to such variation in thickness.

When the sheet 12 is wound around the winding core 11, as shown in FIG. 7, the element pattern structure 22a has an outer peripheral surface 11S of the winding core 11 rather than a portion of the support layer 21 where each element pattern structure 22a is located. The sheet 12 may be wound around the core 11 so as to be located closer to the core 11. That is, the sheet 12 may be wound around the core 11 so that the element pattern structure 22a is located on the surface of the sheet 12 toward the core. Alternatively, the sheet 12 is wound around the winding core 11 so that the portion of the support layer 21 where each element pattern structure 22a is located is located closer to the outer peripheral surface 11S of the winding core 11 than the element pattern structure 22a. May be good. That is, the sheet 12 may be wound around the core 11 so that the element pattern structure 22a is located on the surface opposite to the surface of the sheet 12 toward the core.

[Roll body of comparative example]
The configuration of the roll body of the comparative example will be described with reference to FIGS. 8 to 10.
As shown in FIG. 8, the roll body R includes a winding core R1 extending along the axial direction, like the roll body 10 of the first embodiment described above, and the winding core R1 has an outer peripheral surface R1S. A sheet R2 is wound around the outer peripheral surface R1S of the winding core R1 along the circumferential direction DC of the winding core R1.

As shown in FIG. 9, the sheet R2 includes a plurality of first regions R2A and a plurality of second regions R2B. In a plan view facing the plane on which the sheet R2 extends, the first region R2A and the second region R2B each have a linear shape extending along the extending direction D1, and the first region R2A and the second region R2B respectively. Are alternately arranged along the width direction D2.

As shown in FIG. 10, the sheet R2 is composed of a support layer R21 and a pattern structure R22. The first region R2A is composed of a part of the support layer R21 and the element pattern structure R22a, while the second region R2B is composed of only a part of the support layer R21.

Therefore, in the roll body R, the density of the element pattern structure R22a in the first region R2A is higher than the density of the element pattern structure R22a in the second region R2B, as in the roll body 10 of the first embodiment.

As described above, each of the first region R2A and the second region R2B extends along the extending direction D1, and the first region R2A and the second region R2B are alternately arranged along the width direction D2. I'm out. Therefore, when the sheet R2 is wound around the winding core R1, the portion around which the first region R2A is wound and the portion around which the second region R2B is wound are fixed in the axial DA of the winding core R1. As a result, in the portion of the roll body R where the first region R2A overlaps, the thickness of the winding core R1 along the radial DR becomes relatively large, while in the portion where the second region R2B overlaps, the radial DR The thickness along is relatively small.

As described above, in the roll body R of the comparative example, wrinkles are generated in the sheet R2 wound around the winding core R1 due to the variation in the thickness along the radial DR in the axial direction of the roll body R.

As described above, according to the first embodiment of the roll body, the effects listed below can be obtained.
(1) In the winding core 11, the portion around which the first region 12A is wound and the portion around which the second region 12B is wound are not fixed in the axial direction DA. Therefore, in the roll body 10, in the axial DA of the winding core 11, variation in thickness along the radial DR of the winding core 11 can be suppressed. Therefore, it is possible to prevent wrinkles from forming on the sheet 12 wound around the core 11.

(2) In the configuration in which the density of the element pattern structure 22a in the second region 12B is the minimum, it is possible to suppress the variation in the thickness of the winding core 11 in the sheet 12 along the radial DR.

(3) In a configuration in which the element pattern structures 22a forming the convex portions are lined up with a gap in the arrangement direction, wrinkles are suppressed on the sheet 12 wound around the winding core 11.

The above-mentioned first embodiment can be appropriately modified and implemented as follows.
The first region 12A and the second region 12B are not limited to a linear shape, and may have a polygonal shape having at least one bent portion, or may have a curved shape having at least one bent portion. Even with such a configuration, if the element pattern structure 22a is located over the entire first region 12A and has a predetermined thickness, the same effect as (3) described above can be obtained. .. Further, if the element pattern structure 22a is located only in the first region 12A, the same effect as (2) described above can be obtained. Further, if each of the first region 12A and the second region 12B extends along the direction intersecting both the extending direction D1 and the width direction D2, and is arranged alternately along the arrangement direction. The same effect as (1) described above can be obtained.

The element pattern structure 22a may be repeated at a predetermined cycle along the extending direction D1. That is, each element pattern structure 22a has a linear shape extending along a direction intersecting both the extending direction D1 and the width direction D2, and the length in the extending direction D1 is the extension of the sheet 12. It may be shorter than the length along the direction D1.

As shown in FIG. 11, the sheet 12 may be configured to include the pattern layer 23. The pattern layer 23 is an uneven structure supported by the support layer 21, the first region 12A is a thick portion of the pattern layer 23 including the element pattern structure 22a, and the second region 12B is the pattern layer 23. It may be a thin portion that does not include the element pattern structure 22a. That is, the pattern layer 23 has a first portion 23a included in the first region 12A and a second portion 23b included in the second region 12B, and is more than the second portion 23b in the first portion 23a. The protruding portion may have an element pattern structure 22a. In such a configuration, the pattern structure 22 is formed by a portion of the first portion 23a protruding from the second portion 23b, and the uneven surface in the pattern layer 23 is an example of the surface 12S of the sheet 12.

According to the above configuration, the effects described below can be obtained.
(4) In a configuration including a part of the pattern layer 23 composed of the first region 12A and the second region 12B having different thicknesses, wrinkles can be suppressed on the sheet 12 wound around the winding core 11. ..

The first region 12A and the second region 12B do not have to extend along the direction intersecting both the extending direction D1 and the width direction D2. That is, it may extend along the extending direction D1 or may extend along the width direction D2. In such a configuration, in the first region 12A and the second region 12B, that is, in the strip-shaped region, at least a part of the edge of each strip-shaped region along the extending direction of each strip-shaped region intersects both the extending direction D1 and the width direction D2. It suffices if it extends along the direction in which it is used. In other words, it suffices to include a portion in which the edge of each band-shaped region does not extend along the extending direction D1 and does not extend along the width direction D2.

For example, as shown in FIG. 12, in the sheet 12a, the first region 12Aa has a shape extending along the extending direction D1 and includes an edge 12Ae along the extending direction of the first region 12Aa. Each edge 12Ae has a wavy shape with a plurality of bends aligned along the extending direction D1 and thus extends along a direction intersecting both the extending direction D1 and the width direction D2. .. That is, each edge 12Ae includes a portion that does not extend along the extending direction D1 and does not extend along the width direction D2.

The edge 12Ae of the first region 12Aa is also the edge 12Be of the second region 12Ba adjacent to the first region 12Aa. That is, the edge 12Be of the second region 12Ba also has a wavy line shape having a plurality of bent portions arranged along the extending direction D1, thereby intersecting both the extending direction D1 and the width direction D2. Extends along. That is, each edge 12Be includes a portion that does not extend along the extending direction D1 and does not extend along the width direction D2.

In other words, in the first region 12Aa, the position of the edge 12Ae included in each first region 12Aa in the circumferential direction of the winding core 11 changes continuously along the axial direction.

With such a configuration, the effects described below can be obtained.
(5) In the winding core 11, the portion around which the edge 12Ae of the first region 12Aa is wound and the portion around which the edge 12Be of the second region 12Ba is wound are not fixed in the axial direction. Therefore, at the boundary between the first region 12Aa and the second region 12Ba, the difference in thickness along the radial direction of the winding core 11 is likely to be alleviated, and even if the densities of the element pattern structures are different from each other, the winding core 11 In the axial direction, it is possible to prevent the thickness of the winding core 11 from suddenly changing along the radial direction. As a result, wrinkles are suppressed on the sheet 12a wound around the core 11.

In the configuration described above with reference to FIG. 12, the edge 12Ae of the first region 12Aa and the edge 12Be of the second region 12Ba each have a polygonal line shape having a plurality of bent portions arranged along the extending direction D1. It may have a polygonal line shape having one bent portion, or it may have an arc shape.

-Each element pattern structure may be configured to include a plurality of prism groups. In FIG. 13, which is referred to below, a part of the planar structure of the sheet 12b as seen from the direction facing the plane on which the sheet 12b extends is enlarged and shown.

As shown in FIG. 13, one first region 12Ab is sandwiched between two second regions 12Bb in the width direction D2 in a plan view facing the plane on which the sheet 12b extends. A plurality of cells C are partitioned in the first region 12Ab. In other words, a plurality of cells C are partitioned in the element pattern structure 22p located in the first region 12Ab. The plurality of cells C include a cell C having a triangular shape and a cell C having a rectangular shape in a plan view facing the plane on which the sheet 12b extends. As described above, the plurality of cells C may include cells C having different shapes in a plan view facing the plane on which the sheet 12b expands, and all cells C face the plane on which the sheet 12b expands. The shapes in a plan view may be the same.

A prism group composed of a plurality of prisms Pr is located in each cell C. In each prism group, a plurality of prisms Pr having an arc shape are connected along one direction in a plan view facing the plane on which the sheet 12b spreads. The plurality of prism groups include prism groups in which the directions in which the prism Prs are connected are different from each other. Further, the plurality of prism groups include a prism group in which the number of prism Prs belonging to one prism group is different from each other, or a prism group in which the pitches of the prism Prs in the direction in which the plurality of prism Prs are connected are different from each other. In all the prism groups, the directions in which the prism Prs are connected may be equal to each other, and in all the prism groups, the number of prism Prs included in each prism group or the prism Prs in the direction in which a plurality of prisms Prs are connected are connected. Pitches may be equal.

In the element pattern structure 22p, a plurality of prism groups are arranged along the extending direction D1 and a plurality of prism groups are arranged along the width direction D2. In the element pattern structure 22p, while only one prism group is located in the extending direction D1, a plurality of prism groups may be arranged along the width direction D2, or only one prism group may be arranged in the width direction D2. On the other hand, a plurality of prism groups may be arranged along the extending direction D1. Further, the element pattern structure 22p may be composed of only one prism group.

Each prism Pr has an arc shape in a plan view facing the plane on which the sheet 12b spreads, but may have a linear shape. The plurality of prism groups may include both a prism group composed of prism Prs having an arc shape and a prism group composed of prism Prs having a linear shape, or all prism groups. In, each prism Pr may have a linear shape.

FIG. 14 is a cross-sectional structure along the thickness direction of the sheet 12b and a cross-sectional structure orthogonal to the direction in which the plurality of prisms Pr extend, in other words, a cross-sectional structure in the width direction D2, which is included in the element pattern structure 22p1. An example of the cross-sectional structure corresponding to one prism group is shown. In FIG. 14, the pitch of the prism Pr gradually decreases along the direction in which the plurality of prisms Pr are connected, that is, in the cross section of the prism Pr, one of the two inclination angles sandwiching the apex gradually decreases. Is described. However, in the direction in which the plurality of prisms Pr are connected, the pitch of the prism Prs may be constant as shown in FIG. 13 referred to above, and the two inclination angles sandwiching the vertices are both the plurality of prisms. May be constant in the direction in which they are connected.

As shown in FIG. 14, each prism Pr is an asymmetric prism having different inclination angles on both sides of the apex in a cross section along the thickness direction of the sheet 12b. More specifically, each prism Pr has an apex Pra, and in a cross section along the thickness direction of the sheet 12b, the inclination angle on one side is the first inclination angle θ1 and the inclination on the other side on both sides of the apex Pra. The angle is the second inclination angle θ2. Each of the first inclination angle θ1 and the second inclination angle θ2 is an angle formed by the surface on which the element pattern structure 22p is located in the support layer 21 and the inclined surface of the prism Pr. The first inclination angle θ1 and the second inclination angle θ2 have different sizes, and the first inclination angle θ1 is an acute angle, while the second inclination angle θ2 is a right angle. Both the first inclination angle θ1 and the second inclination angle θ2 may be acute angles.

The first inclination angle θ1 in the prism Pr gradually decreases along the direction in which the plurality of prisms Pr are connected. That is, the pitch of the prism Prs gradually increases in the direction in which the plurality of prisms Prs are connected. On the other hand, the second inclination angle θ2 is constant in the direction in which the plurality of prisms Pr are connected. In addition, both the first inclination angle θ1 and the second inclination angle θ2 may be continuously changed along the direction in which the plurality of prisms Pr are connected.

The element pattern structure 22p has a support portion 22p1 located between each prism Pr and the support layer 21 in the thickness direction of the sheet 12b. Each prism Pr protrudes from the support portion 22p1 toward the side opposite to the side where the support layer 21 is located with respect to the support portion 22p1. The plurality of prisms Pr are connected to each other via the support portion 22p1. The element pattern structure 22p does not have to have the support portion 22p1.

As the material for forming the element pattern structure 22p, a material having light transparency may be used, or a material having a property of reflecting most of the light incident on the element pattern structure 22p may be used. When the material for forming the element pattern structure 22p is a material having light transparency, for example, various resins or dielectrics having light transmission can be used as the material for forming the element pattern structure 22p. When the material for forming the element pattern structure 22p is a material having a property of reflecting most of the light incident on the element pattern structure 22p, for example, a metal can be used as the material for forming the element pattern structure 22p. The element pattern structure 22p may include both a layer formed of a light-transmitting material and a layer formed of a light-reflecting material.

The element pattern structure 22p includes cells C in which a plurality of prisms Pr are connected to each other in different directions, and includes cells C in which the number of prisms Pr included in one prism group is different from each other. Therefore, between cells C in which the directions in which a plurality of prisms Pr are arranged are different from each other, and between cells C in which the number of prisms Pr included in one prism group is different from each other, the characteristics of transmitting light in each cell C and light are transmitted. The reflective properties can be different from each other.

With such a configuration, the effects described below can be obtained.
(6) In the winding core 11, the portion around which the first region 12Ab is wound and the portion around which the second region 12Bb is wound are not fixed in the axial direction. Therefore, even if the element pattern structure 22p located in the first region 12Ab includes a plurality of prism Prs, the deformation of the prism Pr caused by winding the sheet 12b around the winding core 11 can be suppressed.

The configuration described above with reference to FIGS. 13 and 14 can be further modified as follows. That is, in the first region, the portion including the plurality of prisms Pr may be the prism portion, and the first region may include a cushioning portion that sandwiches the prism portions in the width direction D2. The height of the cushioning portion is lower than the height of the prism portion, and the cushioning portion includes an uneven surface on a surface opposite to the surface in contact with the support layer 21. Further, the first region may further include a transition portion between the prism portion and the buffer portion in the width direction D2. The height of the transition portion is, for example, the size between the height of the prism portion and the height of the buffer portion. The height of the prism portion, the cushioning portion, and the transition portion is the maximum value of the height in each portion. These sheets will be described in more detail with reference to FIGS. 15 and 16.

FIG. 15 shows an enlarged part of the planar structure of the sheet 12c as seen from the direction facing the plane on which the sheet 12c extends. Further, FIG. 16 shows a cross-sectional structure along the thickness direction of the sheet 12c and a cross-sectional structure orthogonal to the direction in which the plurality of prisms Pr extend.

As shown in FIG. 15, one first region 12Ac is sandwiched between two second regions 12Bc in the width direction D2 in a plan view facing the plane on which the sheet 12c extends. The first region 12Ab includes a prism portion Ac1 extending along a direction intersecting the extending direction D1 and the width direction D2, two cushioning portions Ac2, and two transition portions Ac3. The two buffer portions Ac2 sandwich the prism portion Ac1 in the width direction D2. Each transition portion Ac3 is located between the prism portion Ac1 and each buffer portion Ac2 in the width direction D2. Each buffer portion Ac2 and each transition portion Ac3 extend along the direction in which the prism portion Ac1 extends.

In a plan view facing the plane on which the sheet 12c spreads, the total area of the cushioning portions Ac2 is preferably larger than the area of the prism portion Ac1, and the area of each cushioning portion Ac2 is larger than the area of the prism portion Ac1. Is more preferable. In other words, in the width direction D2, the total length of the widths of the cushioning portions Ac2 is preferably longer than the width of the prism portion Ac1, and the width of each cushioning portion Ac2 is longer than the width of the prism portion Ac1. Is more preferable.

As shown in FIG. 16, in the first region 12Ac, the height of the prism portion Ac1 is the highest and the height of the buffer portion Ac2 is the lowest. As described above, the cushioning portion Ac2 includes an uneven surface on the surface opposite to the surface in contact with the support layer 21. As such an uneven surface, an uneven surface having any of a function of diffracting light, a function of preventing reflection of light, a function of scattering light, and a function of interfering with light can be adopted. Further, the uneven surface may include a plurality of portions having different functions from each other.

Similar to the cushioning portion Ac2, the transition portion Ac3 may include an uneven surface on the surface opposite to the surface in contact with the support layer 21. The same configuration as that of the cushioning portion Ac2 can be adopted for the uneven surface of the transition portion Ac3. Alternatively, in the transition portion Ac3, the surface opposite to the surface in contact with the support layer 21 may be an inclined surface. The inclined surface has an inclination such that the height of the transition portion Ac3 gradually decreases along the direction from the prism portion Ac1 to the buffer portion Ac2.

The prism portion Ac1, the buffer portion Ac2, and the transition portion Ac3 can be integrally formed as one layer. As a result, the positions of the prism portion Ac1, the buffer portion Ac2, and the transition portion Ac3 can be prevented from shifting with respect to the positions of the other portions. When forming such a first region 12Ac, one original plate may be used, or by connecting the original plates for the prism portion, the original plate for the buffer portion, and the original plate for the transition portion, which are the original plates formed separately for each. It may be used as one original plate.

When the sheet 12c is wound around the winding core, the first region 12Ac includes the cushioning portion Ac2, so that the cushioning portion Ac2 has a pressure between the pressure applied to the prism portion Ac1 and the pressure applied to the second region 12Bc. Pressure with the magnitude of is applied. Therefore, it is possible to prevent the pressure from suddenly changing between the pressure applied to the prism portion Ac1 and the pressure applied to the second region 12Bc. As a result, deformation of the prism portion Ac1 when the sheet 12c is wound is further suppressed.

Further, since the first region 12Ac includes the transition portion Ac3, the step between the prism portion Ac1 and the buffer portion Ac2 is relaxed by the transition portion Ac3. Therefore, the deformation of the prism portion Ac1 is further suppressed.

The first region 12Ab has a prism portion Ac1 extending along a direction intersecting the extending direction D1 and the width direction D2, a cushioning portion Ac2 on only one side of the prism portion Ac1 in the width direction D2, and a prism portion. It is also possible to have a configuration in which one transition portion Ac3 is provided between Ac1 and the buffer portion Ac2. Further, the first region 12Ab is configured to include only a prism portion Ac1 extending along a direction intersecting the extending direction D1 and the width direction D2, and one cushioning portion Ac2 adjacent to the prism portion Ac1. You can also.

Further, the first region 12Ab includes only a prism portion Ac1 extending along a direction intersecting the extending direction D1 and the width direction D2, and two cushioning portions Ac2 sandwiching the prism portion Ac1 in the width direction D2. It can also be. Further, the first region 12Ab is composed of a prism portion Ac1 extending along a direction intersecting the extending direction D1 and the width direction D2, two cushioning portions Ac2 sandwiching the prism portion Ac1, and two cushioning portions Ac2. It is also possible to provide one transition portion Ac3 between any of them and the prism portion Ac1, while the other buffer portion Ac2 and the prism portion Ac1 are adjacent to each other.

The configuration described above with reference to FIGS. 13 and 14 can be further modified as follows. That is, the configuration described above with reference to FIGS. 13 and 14 can be implemented in combination with the configuration previously described with reference to FIG.
As shown in FIG. 17, in a plan view facing the plane on which the sheet 12d extends, one first region 12Ad is sandwiched between two second regions 12Bd in the width direction D2. Similar to the above-mentioned first region 12Ab, a plurality of cells C are partitioned in the first region 12Ad.

The second region 12Bd includes a ridge Bd1 extending along the extending direction D1. The second region 12Bd includes a plurality of ridges Bd1, and the plurality of ridges Bd1 are arranged apart from each other along the width direction D2. The second region 12Bd may include only one ridge Bd1.

As shown in FIG. 18, the sheet 12d is composed of a support layer 21 and a pattern layer 23d. Each of the first region 12Ad and the second region 12Bd contains different parts of the pattern layer 23d. The plurality of prisms Pr included in the first region 12Ad have an element pattern structure 22p, and the first region 12Ad is a thick portion in the pattern layer 23d. The second region 12Bd is a thin portion of the pattern layer 23d that does not include the element pattern structure 22p.

According to such a configuration, the following effects can be obtained when the pattern layer 23d is formed on the support layer 21. That is, when the sheet 12d is manufactured, after the coating film for forming the pattern layer 23d is formed on the support layer 21, the original plate for forming the prism Pr is pressed against the coating film. At this time, since the ridge Bd1 is formed at the same time as the prism Pr, the original plate has a pattern corresponding to the ridge Bd1. As a result, the pattern of the original plate is pressed against the portion corresponding to the second region 12Bd in the coating film for forming the pattern layer 23d, so that the portion corresponding to the second region 12Bd in the coating film. However, it is suppressed from rising from the support layer 21.

Further, since the second region 12Bd includes the ridge Bd1, a part of the second region 12Bd is formed when the sheet 12d is wound around the winding core 11 as compared with the case where the second region 12Bd does not have the ridge. , Even if it comes into contact with another part of the second region 12Bd, blocking occurs between them is suppressed.

The configuration described above with reference to FIGS. 17 and 18 can be implemented in combination with the configuration described above with reference to FIGS. 15 and 16. That is, the portion of the pattern layer 23d corresponding to the first region 12Ad may include at least one of the buffer portion Ac2 and the transition portion Ac3.

-In the first embodiment, the configuration in which the density of the element pattern structure in the first region and the density of the element pattern structure in the second region are different from each other has been described. Not limited to this, for example, the density of the element pattern structure in the first region and the density of the element pattern structure in the second region may be equal to each other. In this case, the density of the element pattern structure in the first region may be equal to each other. It suffices if the arrangement and the arrangement of the element pattern structure in the second region are different from each other. Alternatively, the density of the element pattern structure in the first region and the density of the element pattern structure in the second region are different from each other, and the arrangement of the element pattern structure in the first region and the elements in the second region are different from each other. The density of the pattern structure may be different.

[Second Embodiment]
A second embodiment in which the roll body is embodied will be described with reference to FIGS. 19 to 24. The roll body of the second embodiment is different from the roll body of the first embodiment in that the first region includes a plurality of element pattern structures. Therefore, in the following, while these differences will be described in detail, detailed description of the configuration common to the roll body of the first embodiment will be omitted. Further, in the following, the configurations of the first to fifth examples in the roll body will be described in order.

In each of FIGS. 19 to 24, the element pattern structure is used for the purpose of easily distinguishing the portion where the element pattern structure is located and the portion where the element pattern structure is not located in the plan view facing the plane on which the sheet spreads. Dots are attached.

[First example]
A first example of the roll body of the second embodiment will be described with reference to FIG.
As shown in FIG. 19, in the sheet 30, each of the first region 30A and the second region 30B has a linear shape extending along a direction intersecting both the extending direction D1 and the width direction D2.

The sheet 30 is composed of a support layer 31 and a pattern structure 32. The pattern structure 32 is composed of a plurality of element pattern structures 32a, and the plurality of element pattern structures 32a belong to one first region 30A.

The pattern structure 32 includes two or more types of element pattern structures 32a having different shapes in a plan view facing the plane on which the sheet 30 spreads. Therefore, the shape of the pattern structure 32 can be complicated as compared with the configuration in which all the element pattern structures 32a have the same shape.

In the pattern structure 32, each element pattern structure 32a is a portion having a predetermined thickness. The pattern structure 32 is located in the first region 30A, but not in the second region 30B. In the first region 30A, the plurality of element pattern structures 32a are arranged apart from each other along the direction in which the first region 30A extends.

Each element pattern structure 32a has a shape that expresses one of the alphabets in a plan view facing the plane on which the sheet 30 spreads. Each element pattern structure 32a has a shape representing any one of the alphabets "G", "E", "N", "U", and "I".

In other words, in the first example of the roll body, the sheet 30 includes a support layer 31 and a plurality of element pattern structure groups 32b formed on the surface of the sheet 30 and periodically arranged along the extending direction D1. There is. Each element pattern structure group 32b is composed of a plurality of element pattern structures 32a supported by the support layer 31 to form a convex portion on the surface of the sheet 30. In the first example of the roll body, the element pattern structure 32a having a shape representing each of "G", "E", "N", "U", "I", "N", and "E". Therefore, one element pattern structure group 32b is configured. A plurality of element pattern structures 32a constituting one element pattern structure group 32b are arranged along a direction intersecting both the extending direction D1 and the width direction D2. In the sheet 30, a plurality of element pattern structure groups 32b are repeated at a predetermined cycle in a band-shaped region extending along the extending direction D1 and occupying a part of the sheet 30 in the width direction D2.

In the plan view facing the plane on which the sheet 30 spreads, the element pattern structure group region GR is a collection of a plurality of element pattern structures 32a constituting one element pattern structure group 32b, and is a part of the edge of each element pattern structure 32a. It is partitioned by surrounding it with an envelope contour line OL in contact with. The envelope contour line OL is in contact with all the element pattern structures 32a belonging to one element pattern structure group 32b. The envelope contour line OL is preferably set to include a straight line extending along the direction in which the element pattern structures 32a are arranged.

In the first example of the roll body, the line parallel to the extending direction D1 is the reference line LD. Although the reference line LD is set at a position overlapping the seat 30, it may be set at a position away from the seat 30. The length from at least one end of the element pattern structure group region GR in the width direction D2 to the reference line LD changes periodically along the extension direction D1. In the first example of the roll body, the length from each end of the element pattern structure group region GR in the width direction D2 to the reference line LD changes in one element pattern structure group region GR, and such an element pattern structure group By periodically repeating the region GR along the extending direction D1, the distance from each end to the reference line LD changes periodically along the extending direction D1.

[Second example]
A second example of the roll body of the second embodiment will be described with reference to FIG.
As shown in FIG. 20, in the sheet 40, the first region 40A and the second region 40B have a linear shape extending along a direction intersecting both the extending direction D1 and the width direction D2.

The sheet 40 is composed of a support layer 41 and a pattern structure 42, and the pattern structure 42 includes a plurality of element pattern structure groups 42b. Each element pattern structure group 42b is composed of a plurality of element pattern structures 42a. Each first region 40A and each second region 40B contains an element pattern structure group 42b.

In the pattern structure 42, the plurality of element pattern structures 42a belonging to one element pattern structure group 42b are arranged apart from each other along the width direction D2. The plurality of element pattern structures 42a belonging to each element pattern structure group 42b have the same configuration as the plurality of element pattern structures 32a in the first example.

The plurality of element pattern structure groups 42b belonging to one first region 40A are arranged apart from each other along a direction intersecting both the extending direction D1 and the width direction D2. When a plurality of element pattern structure groups 42b belong to one second region 40B, the plurality of element pattern structure groups 42b have a extending direction as in the case of the plurality of element pattern structure groups 42b belonging to one first region 40A. It is preferable to line up at a distance along a direction intersecting both D1 and D2 in the width direction.

The number of element pattern structure groups 42b belonging to one first region 40A is larger than the number of element pattern structure groups 42b belonging to one second region 40B. More specifically, one element pattern structure group 42b belongs to one first region 40A, and one element pattern structure group 42b belongs to one second region 40B.

If the number of element pattern structure groups 42b belonging to one first region 40A is different from the number of element pattern structure groups 42b belonging to one second region 40B, the element pattern structure belonging to one first region 40A The number of the group 42b may be other than 3, and the number of the element pattern structure group 42b belonging to one second region 40B may be other than 1. Alternatively, the number of element pattern structure groups 42b belonging to one first region 40A may be smaller than the number of element pattern structure groups 42b belonging to one second region 40B.

According to the second example, since not only the first region 40A but also the second region 40B includes the element pattern structure group 42b, the sheet 40 is expanded as compared with the configuration in which only the first region 40A includes the element pattern structure group 42b. The shape of the pattern structure 42 becomes more complicated in the plan view facing the plane.

In other words, in the second example of the roll body, the sheet 40 includes a support layer 41 and a plurality of element pattern structure groups 42b formed on the surface of the sheet 40 and periodically arranged along the extending direction D1. There is. Each element pattern structure group 42b is composed of a plurality of element pattern structures 42a supported by the support layer 41 to form a convex portion on the surface of the sheet 40.

A plurality of element pattern structures 42a constituting one element pattern structure group 42b are arranged along the width direction D2. Each element pattern structure group 42b has a length almost entirely in the width direction D2 of the sheet 40, and a plurality of element pattern structure groups 42b are repeated in a predetermined cycle along the extension direction D1. In the plurality of element pattern structure groups 42b, every other element pattern structure group 42b is located so that the center of the element pattern structure group 42b and the center of the sheet 40 substantially coincide with each other in the width direction D2. Between these element pattern structure groups 42b, in the width direction D2, the element pattern structure group 42b located closer to one end and the element pattern structure group 42b located closer to the other end alternate one by one. Is located in.

The envelope contour line OL is in contact with all the element pattern structures 42a belonging to one element pattern structure group 42b. The envelope contour line OL is preferably set to include a straight line extending along the direction in which the element pattern structures 42a are arranged. In the second example of the roll body, the length from each end of the element pattern structure group region GR in the width direction D2 to the reference line LD is periodic along the extending direction D1 between the element pattern structure group region GR. It has changed to.

[Third example]
A third example of the roll body of the second embodiment will be described with reference to FIG. 21.
As shown in FIG. 21, in the sheet 50, the first region 50A and the second region 50B extend along a direction intersecting both the extending direction D1 and the width direction D2, and the first region 50A and the second region 50A and the second region 50B. The edge of each region along the extending direction of the region 50B has a polygonal shape having a plurality of bent portions. The first region 50A and the second region 50B each have a band shape having a plurality of constrictions along the extending direction of each region. The width of the first region 50A and the width of the second region 50B are substantially equal to each other.

The sheet 50 is composed of a support layer 51 and a pattern structure 52, and a plurality of element pattern structures 52a belong to one first region 50A. In the first region 50A, the plurality of element pattern structures 52a are arranged apart from each other along the extending direction of the first region 50A. In a plan view facing the plane on which the sheet 50 spreads, each element pattern structure 52a has a hexagonal shape, and of the six sides partitioning each element pattern structure 52a, two sides parallel to each other are along the width direction D2. Is extending.

On the other hand, one element pattern structure 52a belongs to one second region 50B. In the second region 50B, the element pattern structure 52a is located in the center in the width direction D2, and the position in the width direction D2 in the element pattern structure 52a of the second region 50B is one element pattern structure belonging to each first region 50A. It is equal to the position in the width direction D2 at 52a. Therefore, in the pattern structure 52, a plurality of element pattern structures 52a including the element pattern structure 52a belonging to the second region 50B are continuous along the extending direction D1. All element pattern structures 52a have the same shape as each other.

According to the third example, even if all the element pattern structures have the same shape, it is possible to prevent the element pattern structure from being continuously wound at a predetermined position in the axial direction of the winding core 11 and to prevent the sheet 50 from being continuously wound. In, variation in thickness along the radial direction of the winding core 11 is suppressed.

In other words, in the third example of the roll body, the sheet 50 includes a support layer 51 and a plurality of element pattern structure groups 52b formed on the surface of the sheet 50 and periodically arranged along the extending direction D1. There is. Each element pattern structure group 52b is composed of a plurality of element pattern structures 52a that are supported by the support layer 51 and form a convex portion on the surface of the sheet 50.

In the third example of the roll body, one element pattern structure group 52b is configured by a plurality of element pattern structures 52a having a hexagonal shape. The plurality of element pattern structures 52a constituting one element pattern structure group 52b are arranged along the direction intersecting the extending direction D1. In the extending direction D1, the plurality of element pattern structure groups 52b are arranged apart from each other, and one element pattern structure 52a is located between the two element pattern structure groups 52b in the extending direction D1.

The envelope contour line OL is set along a part of the side of each element pattern structure 52a. In the fourth example of the roll body, the side partitioning the end portion in the width direction D2 in the element pattern structure group region GR is inclined with respect to both the extension direction D1 and the width direction D2. Therefore, the length from each end of the element pattern structure group region GR in the width direction D2 to the reference line LD changes in one element pattern structure group 52b, and such an element pattern structure group region GR changes in the extending direction D1. By repeating along the line, the distance from the end to the reference line LD changes periodically along the extending direction D1.

[4th example]
A fourth example of the roll body of the second embodiment will be described with reference to FIGS. 22 and 23.
As shown in FIG. 22, in the sheet 60, the first region 60A and the second region 60B are arranged along the directions intersecting both the extending direction D1 and the width direction D2. The edge of the first region 60A along the extending direction of the first region 60A has a polygonal line having a plurality of bent portions, and the first region 60A has a plurality of constricted portions along the extending direction of the first region 60A. It has a band shape. The second region 60B has a polygonal shape having a plurality of bent portions. The width of the first region 60A is larger than the width of the second region 60B.

The sheet 60 is composed of a support layer 61 and a pattern structure 62, and a plurality of element pattern structures 62a belong to one first region 60A. The plurality of element pattern structures 62a have the same shape as each other in a plan view facing the plane on which the sheet 60 extends.

Each element pattern structure 62a has a hexagonal shape, and of the six sides partitioning each element pattern structure 62a, two sides parallel to each other extend along the extending direction D1. The plurality of element pattern structures 62a belonging to one first region 60A are arranged at intervals along the direction in which the first region 60A extends.

On the other hand, the second region 60B does not belong to one element pattern structure 62a. That is, the second region 60B is composed of only a part of the support layer 61.
Even with such a fourth case, the same effect as that of the third case can be obtained.

In other words, as shown in FIG. 23, in the fourth example of the roll body, the sheet 60 is formed on the support layer 61 and the surface of the sheet 60, and a plurality of element patterns periodically arranged along the extending direction D1. It includes the structure group 62b. Each element pattern structure group 62b is composed of a plurality of element pattern structures 62a supported by the support layer 61 to form a convex portion on the surface of the sheet 60.

In the fourth example of the roll body, one element pattern structure group 62b is configured by the element pattern structure 62a having a hexagonal shape. A plurality of element pattern structures 62a constituting one element pattern structure group 62b are arranged along the width direction D2. A plurality of element pattern structure groups 62b are repeated at a predetermined cycle along the extending direction D1. In the plurality of element pattern structure groups 62b, the number of element pattern structures 62a belonging to one element pattern structure group 62b is different from each other, whereby the positions of the ends in the width direction D2 are different from each other. Are alternately arranged along the extending direction D1. Of the two types of element pattern structure groups 62b, one element pattern structure group 62b contains three element pattern structures 62a, and the other element pattern structure group 62b contains two element pattern structures 62a.

The envelope contour line OL is set along a part of the side of each element pattern structure 62a. In the fourth example of the roll body, the length from each end of the element pattern structure group region GR in the width direction D2 to the reference line LD is periodic along the extending direction D1 between the element pattern structure group region GR. It has changed to.

[Fifth example]
A fifth example of the roll body of the second embodiment will be described with reference to FIG. 24.
As shown in FIG. 24, in the sheet 70, the first region 70A and the second region 70B extend along a direction intersecting both the extending direction D1 and the width direction D2. The first region 70A has a strip shape in which a plurality of rhombuses are connected along a direction intersecting both the extending direction D1 and the width direction D2 in a plan view facing the plane on which the sheet 70 extends.

In a plan view facing the plane on which the sheet 70 spreads, the second region 70B has a band shape, and in the second region 70B, the edge along the extending direction of the second region 70B has a polygonal line shape having a plurality of bent portions. are doing. The second region 70B includes a portion in which the portion having a hexagonal shape is continuous along the extending direction of the second region 70B. Further, the second region 70B has a band shape having a plurality of constricted portions along the extending direction of the second region 70B.

The sheet 70 is composed of a support layer 71 and a pattern structure 72, and a plurality of element pattern structures 72a belong to one first region 70A. Each element pattern structure 72a has a diamond shape, and the plurality of element pattern structures 72a are continuous along the extending direction of the first region 70A.

On the other hand, one element pattern structure 72a does not belong to each second region 70B. In other words, each second region 70B is composed of only a part of the support layer 71.
Even with such a fifth case, the same effect as that of the third case can be obtained.

In other words, in the fifth example of the roll body, the sheet 70 includes a support layer 71 and a plurality of element pattern structure groups 72b formed on the surface of the sheet 70 and periodically arranged along the extending direction D1. There is. Each element pattern structure group 72b is composed of a plurality of element pattern structures 72a that are supported by the support layer 71 and form a convex portion on the surface of the sheet 70. In a plan view facing a plane on which the sheet 70 spreads, one element pattern structure group 72b is configured by a plurality of element pattern structures 72a having a rhombic shape. A plurality of element pattern structures 72a constituting one element pattern structure group 72b are arranged along a direction intersecting both the extending direction D1 and the width direction D2. Each element pattern structure group 72b has a length over almost the entire width direction D2, and a plurality of element pattern structure groups 72b are repeated in a predetermined cycle in the extension direction D1.

The envelope contour line OL is set along the outer edge of each element pattern structure 72a belonging to one element pattern structure group 72b. Each side constituting the element pattern structure 72a having a rhombic shape is inclined with respect to both the extending direction D1 and the width direction D2. Therefore, in one element pattern structure group region GR, the length from each end of the element pattern structure group region GR in the width direction D2 to the reference line LD changes periodically along the extension direction D1. As a result, the distance from each end of the element pattern structure group region GR to the reference line LD changes periodically along the extending direction D1.

As described above, according to the second embodiment of the roll body, the effects listed below can be obtained.
(7) According to the first region including a plurality of element pattern structures as in each of the first to fifth examples, compared with the configuration having one continuous element pattern structure over the entire first region. Complex shapes can be expressed by a plurality of element pattern structures.

(8) In a configuration in which the pattern structures include two or more types of element pattern structures having different shapes as in each of the first example and the second example, all the element pattern structures have the same shape. In comparison, the shape of the pattern structure can be complicated.

(9) Even if all the element pattern structures have the same shape as in each of the third to fifth examples, the element pattern structures are continuously arranged at predetermined positions in the axial direction of the winding core 11. The winding is suppressed, and the variation in the thickness of the winding core 11 along the radial direction is suppressed in the sheet.

(10) In the configuration in which not only the first region 40A but also the second region 40B includes the element pattern structure group 42b as in the second example, the configuration in which only the first region 40A includes the element pattern structure group 42b is compared with the configuration in which only the first region 40A includes the element pattern structure group 42b. The shape of the pattern structure 42 becomes more complicated in a plan view facing the plane on which the sheet 40 spreads.

(11) In the element pattern structure group region GR, the length from each end in the width direction D2 to the reference line LD parallel to the extension direction D1 changes periodically along the extension direction D1. , The position of each end changes periodically in the axial direction of the winding core. Therefore, wrinkles are suppressed in the sheet wound around the core as compared with the configuration in which the positions of the ends in the axial direction of the core do not change.

The above-mentioned second embodiment can be appropriately modified and implemented as follows.
In the element pattern structure group region GR, the length from one end of the element pattern structure group region GR in the width direction D2 to the reference line LD changes periodically along the extension direction D1, while the other end. The length from the portion to the reference line LD may be constant in the extending direction D1. Even with such a configuration, wrinkles may occur in the sheet at least at the end portion where the distance from the reference line LD to the end portion periodically changes along the extending direction D1 in the element pattern structure group region GR. It can be suppressed.

-Each of the first to fifth examples may be carried out in combination with the configuration in the modified example of the first embodiment described above with reference to FIG. That is, in each example, the sheet may include a support layer and a pattern layer, and the pattern layer may be an uneven structure including a pattern structure. Then, in the pattern layer, the portion included in the second region and the portion where the element pattern structure is not located may also have a predetermined thickness.

In the second example, the element pattern structure group 42b belonging to the first region 40A and the element pattern structure group 42b belonging to the second region 40B have different shapes in a plan view facing the plane on which the sheet 40 spreads. You may. That is, the element pattern structure group belonging to the first region 40A is composed of a plurality of first element pattern structures, and the element pattern structure group belonging to the second region 40B is a second element pattern structure different from the first element pattern structure. It may be composed of.

-Each element pattern structure is not limited to the above-mentioned shape in the plan view facing the plane on which the sheet spreads, but may have a shape that expresses any one of characters, numbers, symbols, and patterns. good.

-The roll body in each example of the second embodiment may be configured to include a sheet but not a winding core, as in the modified example of the first embodiment.

[Example]
A polyethylene terephthalate film having a thickness of 23 μm was prepared as a base material, and a relief layer ink having the following composition was applied to the base material by a gravure printing method so that the thickness after drying would be 1 μm. .. As a result, six raw fabrics with a length of 5000 m were prepared. Then, a roll body was obtained by winding each raw fabric around the winding core.

[Ink for relief layer]
Urethane acrylate 50.0 parts by mass Methyl ethyl ketone 30.0 parts by mass Ethyl acetate 20.0 parts by mass Photoinitiator 1.5 parts by mass

As the urethane acrylate, Hitachi Chemical Co., Ltd.'s Hitaroid 7903 series: polyfunctional (Hitaroid is a registered trademark) was used, and BASF's Irgacure 184 (Irgacure is a registered trademark) was used as a photoinitiator.

Next, the raw fabric wound around the core is unwound, and a cylindrical original plate having an uneven outer peripheral surface is pressed against the coating layer formed by using the relief layer ink by using the roll photopolymer method. Of the coating layers, the surface opposite to the surface in contact with the base material was processed into an uneven surface. When the original plate was pressed against the coating layer, the press pressure was set to 2 Kgf / cm ² , the press temperature was set to 80 ° C, and the press speed was set to 10 m / min.

At the same time as pressing the original plate against the coating layer, the coating film was cured by irradiating the substrate with ultraviolet rays from the side opposite to the side where the coating film is located. When irradiating with ultraviolet rays, a high-pressure mercury lamp was used, and the exposure amount was set to 300 mJ / cm ² . As a result, a relief layer having a relief surface having a sinusoidal shape having a depth of 120 nm and a period of 700 nm was formed, and a support layer composed of a base material and a relief layer was obtained. Then, a roll body was obtained by winding the support layer around the winding core.

The support layer was unwound from the roll body, and an aluminum layer having a thickness of 70 nm was formed on the entire relief surface of the relief layer by using a roll-type vacuum vapor deposition apparatus. Then, a support layer having an aluminum layer was wound around the winding core to obtain a rolled body.

A mask was formed by drawing out a laminated body of an aluminum layer and a support layer from a roll body and applying a mask ink having the following composition on the aluminum layer by using a gravure printing method. At this time, masks having different shapes were formed in the six roll bodies.

In order to obtain the roll body of Example 1, a mask for forming the pattern layer described above with reference to FIG. 2 is formed on the first roll body, and the second roll body is formed of an example. In order to obtain the roll body of 2, a mask for forming the pattern layer described above was formed using FIG. Further, in order to obtain the roll body of Example 3, a mask for forming the pattern layer described above with reference to FIG. 20 is formed on the third roll body, and the fourth roll body is formed with a mask. In order to obtain the roll body of Example 4, a mask for forming the pattern layer described above was formed using FIG. 21.

Further, in order to obtain the roll body of Example 5, a mask for forming the pattern layer described above with reference to FIG. 22 is formed on the fifth roll body, and the sixth roll body is formed with a mask. In order to obtain the roll body of Comparative Example 1, a mask for forming the pattern layer described above was formed using FIG. Further, after drying, the mask ink was applied to the aluminum layer so that each mask had a thickness of 3 μm.

[Mask ink]
Polyamide resin 20.0 parts by mass Ethanol 50.0 parts by mass Toluene 30.0 parts by mass

By performing an alkali etching treatment on the laminate of the support layer and the aluminum layer, a sheet composed of the support layer and the element pattern structure was obtained. Then, the roll body was obtained by winding the sheet around the winding core.

[evaluation]
In each of the roll bodies of Examples 1 to 5 and the roll body of Comparative Example 1, the sheets were fed out, and it was visually determined whether or not wrinkles were formed on the sheets. In each of the rolls of Examples 1 to 5, it was found that the sheet had no wrinkles, whereas in the roll of Comparative Example 1, it was found that the sheet had wrinkles.

10, R ... roll body, 11, R1 ... winding core, 11S, R1S ... outer peripheral surface, 12, 12a, 12b, 12c, 12d, 30, 40, 50, 60, 70, R2 ... sheet, 12A, 12Aa, 12Ab , 12Ac, 12Ad, 30A, 40A, 50A, 60A, 70A, R2A ... 1st region, 12Ae, 12Be ... Edge, 12A1,23a ... 1st part, 12A2,23b ... 2nd part, 12A3 ... 3rd part, 12B , 12Ba, 12Bb, 12Bc, 12Bd, 30B, 40B, 50B, 60B, 70B, R2B ... second region, 12P ... pattern division region, 12S ... surface, 21,31,41,51,61,71, R21 ... support Layer, 21a, 22p1 ... Support, 22, 32, 42, 52, 62, 72, R22 ... Pattern structure, 22a, 22p, 32a, 42a, 52a, 62a, 72a, R22a ... Element pattern structure, 22b ... Recess, 23, 23d ... pattern layer, 32b, 42b, 52b, 62b, 72b ... element pattern structure group, A ... rotation axis, Ac1 ... prism part, Ac2 ... cushioning part, Ac3 ... transition part, Bd1 ... ridge, C ... cell , GR ... element pattern structure group region, L ... straight line, LB, LD ... reference line, OL ... envelope contour line, P ... reference point, Pr ... prism, Pra ... vertex.

Claims (12)

It comprises a sheet that is a multi-layered body that is rolled up to have a tubular shape that extends along the axial direction.
The sheet has a band shape extending along the extending direction in the unfolded state of the sheet.
The direction orthogonal to the extending direction is the width direction.
The sheet includes a pattern division region composed of a plurality of first regions and a plurality of second regions.
Each of the first regions and the second regions has a band shape extending along the first direction and includes an edge along the first direction, and the edges are in the extending direction and the width direction. It has a shape that extends along the direction of intersection and
In the pattern division region, the first region and the second region are alternately arranged side by side.
The sheet is composed of a support layer and a pattern structure supported by the support layer, and the pattern structure is composed of a plurality of element pattern structures forming convex portions on the surface of the sheet.
The density of the element pattern structure in the first region is different from the density of the element pattern structure in the second region, and
The arrangement of the element pattern structure in the first region satisfies at least one of the differences from the arrangement of the element pattern structure in the second region.
The convex part is
In a plan view facing a plane on which the sheet spreads, a group of prisms in which a plurality of prisms having a linear or arc shape are connected along one direction is included.
Each of the prisms
It is an asymmetric prism having different inclination angles on both sides of the apex in the cross section of the sheet in the width direction.
Roll body. It comprises a sheet that is a multi-layered body that is rolled up to have a tubular shape that extends along the axial direction.
The sheet has a band shape extending along the extending direction in the unfolded state of the sheet.
The sheet includes a pattern division region composed of a plurality of first regions and a plurality of second regions.
Each of the first regions and the second regions has a shape extending along the first direction.
In the pattern division region, the first region and the second region are alternately arranged side by side.
Each of the first regions includes an edge along the first direction, and the position of the edge of each of the first regions in the circumferential direction of the sheet changes continuously along the axial direction.
The sheet is composed of a support layer and a pattern structure supported by the support layer, and the pattern structure is composed of a plurality of element pattern structures forming convex portions on the surface of the sheet.
The density of the element pattern structure in the first region is different from the density of the element pattern structure in the second region, and
The arrangement of the element pattern structure in the first region satisfies at least one of the differences from the arrangement of the element pattern structure in the second region.
The convex part is
In a plan view facing a plane on which the sheet spreads, a group of prisms in which a plurality of prisms having a linear or arc shape are connected along one direction is included.
Each of the prisms
It is an asymmetric prism whose inclination angles are different from each other on both sides of the apex in the cross section in the width direction of the sheet.
Roll body. The roll body extends along the axial direction and further includes a winding core having an outer peripheral surface.
The roll body according to claim 1 or 2, wherein the sheet is wound around the outer peripheral surface along the outer peripheral surface of the winding core. The roll body according to claim 1, wherein the first direction intersects both the extending direction and the width direction. The roll body according to claim 2, wherein the position of each of the first regions in the circumferential direction of the sheet changes continuously along the axial direction. The roll body according to any one of claims 1 to 5, wherein the element pattern structure is located only in the first region. The roll body according to claim 6, wherein the element pattern structure has a band shape having a predetermined thickness over the entire first region. A pattern layer including the pattern structure and being a concavo-convex structure supported by the support layer is provided.
The first region is a thick portion of the pattern layer containing the element pattern structure.
The roll body according to any one of claims 1 to 5, wherein the second region is a thin portion of the pattern layer that does not include the element pattern structure. The roll body according to any one of claims 1 to 5, wherein the pattern structure includes two or more types of the element pattern structures having different shapes in a plan view facing a plane on which the sheet spreads. The roll body according to any one of claims 1 to 5, wherein the plurality of element pattern structures have the same shape as each other in a plan view facing a plane on which the sheet spreads. The pattern structure includes a plurality of element pattern structure groups.
Each element pattern structure group is composed of the plurality of element pattern structures.
Each of the first regions and the second regions includes the element pattern structure group.
The roll body according to any one of claims 1 to 5, wherein the number of the element pattern structures belonging to each of the first regions and the number of the element pattern structures belonging to each of the second regions are different from each other. It comprises a sheet that is a multi-layered body that is rolled up to have a tubular shape that extends along the axial direction.
The sheet has a band shape extending along the extending direction in the unfolded state of the sheet.
The sheet comprises a support layer and a plurality of element pattern structure groups formed on the surface of the sheet and periodically arranged along the extending direction.
Each element pattern structure group is composed of a plurality of element pattern structures supported by the support layer to form a convex portion on the surface of the sheet.
In a plan view facing a plane on which the sheet spreads, a collection of the plurality of element pattern structures constituting one element pattern structure group is surrounded by an envelope contour line in contact with at least a part of the edge of each element pattern structure. The area partitioned by is the element pattern structure group area,
The line parallel to the extending direction is the reference line.
The direction orthogonal to the extending direction is the width direction.
The length from one end of the element pattern structure group region in the width direction to the reference line changes periodically along the extending direction.
The convex part is
In a plan view facing a plane on which the sheet spreads, a group of prisms in which a plurality of prisms having a linear or arc shape are connected along one direction is included.
Each of the prisms
It is an asymmetric prism having different inclination angles on both sides of the apex in the cross section of the sheet in the width direction.
Roll body.

Images