CN107735370B

CN107735370B - Method for manufacturing glass roll and glass roll

Info

Publication number: CN107735370B
Application number: CN201680039774.2A
Authority: CN
Inventors: 村田宪一; 猪饲直弘; 鉴继薰; 泷本博司
Original assignee: Nippon Electric Glass Co Ltd
Current assignee: Nippon Electric Glass Co Ltd
Priority date: 2015-10-21
Filing date: 2016-10-04
Publication date: 2020-09-22
Anticipated expiration: 2036-10-04
Also published as: KR102645964B1; TWI719068B; CN107735370A; WO2017068961A1; JP2017077995A; JP6579374B2; TW201716344A; KR20180071199A

Abstract

The method comprises a primary winding step (A1) for producing a mother glass roll (17), a guide connection winding step (A2) for producing the mother glass roll (25) with a guide, a sizing winding step (A3) for producing a glass roll (41) with a guide having a size adjusted, and a delivery winding step (A4) for producing a glass roll (55) with a guide having a size adjusted for delivery.

Description

Method for manufacturing glass roll and glass roll

Technical Field

The present invention relates to a method for manufacturing a glass roll in the case where a step of winding a glass film around a winding core into a roll shape is performed a plurality of times, and a glass roll obtained thereby.

Background

As is well known, thin display devices such as liquid crystal displays and organic EL displays, and mobile devices such as smart phones and tablet PCs, which have been rapidly spread in recent years, are required to be lightweight. Therefore, as a glass substrate used in these apparatuses, a glass film thinned into a film shape is used in practice. The glass film is in a form of a substantially rectangular shape or the like at the stage of a final product, but is treated as a strip form at the stage of various treatment steps including a manufacturing step or the like.

Since such a glass film has appropriate flexibility, it is usually formed in a form of a glass roll wound in a roll around a winding core in consideration of convenience in handling, storage, transportation, or the like. Therefore, if the glass film is formed in the form of a glass roll in advance, not only is the handling property and the like excellent, but also the work efficiency can be improved even when various treatments are performed.

However, there are cases where: such a glass film is subjected to a process of winding the glass film as a glass roll around a winding core a plurality of times from the time of forming by a glass manufacturer or the like to the time of shipment.

As an example thereof, patent document 1 discloses the following: in the primary winding step, the glass film conveyed while being formed is wound around a winding core together with the protective sheet to produce a mother glass roll, and in the secondary winding step, the mother glass roll is unwound to apply a sufficient tension to the glass film and then wound together with the protective sheet again to produce a product glass roll.

Further, this document discloses that a step of rewinding the glass film may be further included after the main winding step.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2013-14441

Disclosure of Invention

Problems to be solved by the invention

However, the method of manufacturing a glass roll disclosed in patent document 1 merely discloses that after the temporary winding step is performed, the main winding step is performed, and then the rewinding step is performed after that.

Therefore, in order to form a high-quality product having sufficiently small winding displacement and sufficiently high dimensional accuracy from a glass roll shipped as a final product from a glass manufacturer or the like, it is not sufficient to perform the above-described processes in the respective steps.

From the above viewpoint, an object of the present invention is to improve quality of a glass roll for shipment by appropriately selecting the types of a plurality of winding steps to be executed during the period from glass film forming to shipment and the processes in the respective steps.

Means for solving the problems

The present invention, which has been made to solve the above problems, provides a method for manufacturing a glass roll, comprising: a raw winding step of winding the glass film, which is conveyed while being formed, around a winding core together with a protective sheet, thereby producing a mother glass roll; a leader connection winding step of unwinding a mother glass roll and winding the glass film around a winding core together with a protective sheet, and a step of connecting a leader to both longitudinal end portions of the glass film to produce a mother glass roll with a leader; a size-adjusting winding step of unwinding the mother glass roll with the guide, winding the glass film around a winding core together with the protective sheet, and cutting the glass film in the longitudinal direction to a predetermined width to produce a size-adjusted glass roll with the guide; and a delivery winding step of unwinding the glass roll with the adjusted size tape guide, winding the glass film around the winding core together with the protective sheet again, and rewinding the glass film for delivery, thereby producing a delivery sized glass roll with the tape guide. It is preferable that the above-described guide connection winding step, the size adjustment winding step, and the delivery winding step are all performed by a so-called roll-to-roll method (roll method).

According to this configuration, the winding steps performed from the glass film forming to the shipping are of the above-described four types, and appropriate processing is performed in each of these winding steps. Therefore, the delivery glass roll obtained as a final product after all the winding steps are performed, that is, the delivery glass roll with the guide having the adjusted size can be a glass roll having sufficiently small winding displacement and sufficiently high dimensional accuracy. Therefore, the quality of the glass roll for shipment can be improved.

In the above method, it is preferable that the winding is performed by fixing the protective sheet to the winding core without fixing the glass film to the winding core in the primary winding step.

In this way, in the original winding step, the protective sheet is fixed to the winding core and the glass film is not fixed to the winding core, so that tension is not directly applied to the glass film from the winding core, and the glass film is not restrained improperly at the time of winding. Therefore, the forming section is less likely to be adversely affected from the winding side during the glass film forming, and the glass film is less likely to have a variation in thickness. In addition, although the glass film is transported while meandering and wound up as a mother glass roll, the meandering of the glass film is not forcibly corrected. This also makes it difficult for the glass film to be adversely affected in molding and for the glass film to be damaged or damaged during winding due to forcible correction.

In the above method, preferably, in the guide-member coupling and winding step and the size-adjustment winding step, the winding is performed by fixing the guide member to the winding core and fixing the protective sheet to the guide member.

In this way, in the guide-coupled winding step, the guide coupled to the glass film is fixed to the winding core, and the protective sheet is fixed to the guide, so that the winding operation of the glass film can be accurately restrained. Therefore, the conveyance of the glass film to the winding position is guided along an accurate path, and an appropriate tension can be applied to the glass film. As a result, the first operation for correcting the large winding displacement generated in the mother glass roll can be appropriately performed. Further, since the protective sheet is fixed to the guide, the winding length of the protective sheet can be shortened as compared with the case where the protective sheet is fixed to the winding core, and the amount of use can be reduced. In the size-adjusting winding step, the guide is fixed to the winding core and the protective sheet is fixed to the guide, similarly to the immediately preceding guide-coupled winding step, and therefore, the conveyance of the glass film to the winding position is guided to follow a more accurate path, in addition to the correction of the large winding displacement in the immediately preceding step. As a result, the second operation for correcting the large winding displacement occurring in the mother glass roll can be performed more appropriately, and the glass film can be accurately cut (adjusted in size) to a desired width while eliminating the large cutting displacement occurring in the glass film of the mother glass roll.

In the above method, it is preferable that, in the delivery winding step, the winding is performed by fixing the guide to the core and the protective sheet to the core.

In this way, in the take-up step for shipment, the take-up force of the core is directly transmitted to the protective sheet, and therefore, a tension can be applied to the glass film from the protective sheet more reliably. As a result, the glass roll for shipment can be further appropriately rewound.

Instead, in the delivery winding step, winding may be performed by fixing the guide member to the winding core and fixing the protective sheet to the guide member, similarly to the above-described guide member coupling winding step and the size adjustment winding step.

In this case, the glass roll for shipment can be obtained by further appropriately rewinding.

Alternatively, in the delivery winding step, the lamination sheet may be stuck to one surface of the glass film, the guide may be fixed to the winding core, and the protective sheet may be interposed between the other surface of the glass film and the lamination sheet to perform winding.

In this way, the protective sheet is interposed between the surfaces of the glass films and the surface of the laminating sheet, and therefore, the protective sheet is less likely to slide than in the case where the protective sheet is interposed between the surfaces of the two glass films. As a result, winding displacement and windup can be effectively prevented, and a glass roll for shipment can be obtained that is appropriately rewound.

In the winding step for shipment in this case, the winding may be performed without fixing the protective sheet to the core.

Thus, as described above, the sliding of the protective sheet is not easily generated, and the winding length of the protective sheet can be shortened to reduce the amount of use.

The glass roll having completed the delivery winding step in the above manufacturing method is characterized by having the following configuration.

That is, the first glass roll is a delivery glass roll in which a glass film is wound around a winding core together with a protective sheet in a roll shape, wherein a guide is connected to the glass film, the guide is fixed to the winding core, and the protective sheet is fixed to the winding core. In the case of manufacturing the first glass roll, it is not always necessary to perform the four types of winding steps described above.

The second glass roll is characterized in that a glass film is wound around a winding core together with a protective sheet into a roll-like glass roll for shipment, wherein a guide is connected to the glass film, the guide is fixed to the winding core, and the protective sheet is fixed to the guide. In the case of manufacturing the second glass roll, it is not always necessary to perform the four types of winding steps described above.

The third glass roll is a delivery glass roll in which a glass film is wound around a winding core together with a protective sheet in a roll shape, wherein a guide is connected to the glass film, a laminating sheet is attached to one surface of the glass film, the guide is fixed to the winding core, and the protective sheet is interposed between the other surface of the glass film and the laminating sheet without being fixed to the winding core. In the case of manufacturing the third glass roll, it is not always necessary to perform the four types of winding steps described above.

Effects of the invention

According to the present invention, the types of a plurality of winding steps performed during the period from the glass film formation to the shipment and the processes in the respective steps are made appropriate, thereby achieving high quality of the glass roll for shipment.

Drawings

Fig. 1 is a flowchart showing the procedure or flow of a method for manufacturing a glass roll according to an embodiment of the present invention.

Fig. 2 is a schematic front view showing an implementation state of a parent winding step in the method for manufacturing a glass roll according to the embodiment of the present invention.

Fig. 3 is a perspective view of a main part showing a structure for attaching a glass film and a protective sheet to a core when an original winding step is performed in a method for manufacturing a glass roll according to an embodiment of the present invention.

Fig. 4 is a schematic front view showing the state of implementation of the leader-connection winding step and the delivery winding step in the method for manufacturing a glass roll according to the embodiment of the present invention.

Fig. 5 is a perspective view of a main part showing a structure for attaching the guide and the protective sheet to the winding core when the guide-coupled winding step in the method for manufacturing a glass roll according to the embodiment of the present invention is performed.

Fig. 6 is a schematic plan view of a principal part of a preferable joining structure of the leader and the glass film when the leader joining and winding step in the method for manufacturing a glass roll according to the embodiment of the present invention is performed.

Fig. 7 is a schematic front view showing an implementation state of the sizing and winding step in the method for manufacturing a glass roll according to the embodiment of the present invention.

Fig. 8 is a perspective view of a main part showing a structure for attaching a guide and a protective sheet to a core when a delivery winding step is performed in a method for manufacturing a glass roll according to an embodiment of the present invention.

Fig. 9 is a front view showing a schematic principal part of another example of a method of winding a glass film and a protective sheet when a delivery winding step is performed in a method of manufacturing a glass roll according to an embodiment of the present invention.

Detailed Description

Hereinafter, a method for manufacturing a glass roll according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a flowchart showing the procedure of a method for manufacturing a glass roll according to an embodiment of the present invention. As shown in the figure, the method for manufacturing a glass roll includes a primary winding step a1, a guide connection winding step a2, a sizing winding step A3, and a delivery winding step a 4.

In these winding steps a1 to a4, the following processes are roughly performed. That is, in the original winding step a1, the glass film conveyed while being formed is wound around a winding core together with the protective sheet, thereby producing a mother glass roll. In the guide-coupled winding step a2, the above-described mother glass roll is unwound, the glass film is wound around the winding core together with the protective sheet again, and the guides are coupled to both ends of the glass film in the longitudinal direction, thereby producing the mother glass roll with the guides. In the sizing-adjustment winding step a3, the mother glass roll with the guide is unwound, the glass film is wound around the winding core again together with the protective sheet, and the glass film is cut in the longitudinal direction to a predetermined width, thereby producing a sized glass roll with the guide. In the delivery winding step a4, the glass roll with the adjusted size tape guide is unwound, and the glass film is wound around the winding core together with the protective sheet again and rewound for delivery, thereby producing a delivery sized glass roll with the tape guide.

By performing the four types of winding steps a1 to a4, the glass roll for shipment obtained as the final product, that is, the glass roll with the guide adjusted in size for shipment, can be formed into a high-quality product with sufficiently small winding displacement and sufficiently high dimensional accuracy.

The respective processes performed in the four types of winding steps a1 to a4 will be described in detail below.

Fig. 2 is a schematic front view showing a state where the original winding process a1 is performed. As shown in the figure, in the original winding step a1, the glass film G formed by the forming apparatus 1 is cut into a predetermined width by the cutting apparatus 2, and then wound at the winding position 3 located at the downstream end of the glass film conveying path.

In the present embodiment, the molding apparatus 1 performs an overflow down-draw method. Specifically, the molding apparatus 1 includes a molding zone 4, a slow cooling zone 5, and a cooling zone 6 in this order from above. The molding apparatus 1 may perform other down-draw methods such as the flow-hole down-draw method and the redraw method, or may perform a float method.

In the forming region 4, the molten glass G0 overflowing from the top of the forming body 7 toward both sides is fused at the lower end portion and flows down, whereby a plate-like glass film G is formed from the molten glass G0. The formed glass film G is removed of strain in the slow cooling region 5 and cooled to near room temperature in the cooling region 6. A plurality of roller sets 8 are arranged in the slow cooling zone 5 and the cooling zone 6, and both ends of the glass film G in the width direction are guided downward by the roller sets 8.

The formed glass film G is bent in a substantially horizontal direction by a plurality of direction change roller groups 9 supported from below at a position below the forming apparatus 1, and then conveyed to the cutting apparatus 2 while maintaining the posture. The direction change roller group 9 is not suitable for the case where the forming apparatus 1 performs the float process.

The cutting device 2 cuts and removes the ineffective portions (scrap portions) Gx formed at both ends of the glass film G in the width direction. The non-effective portion Gx is relatively thicker than the effective portion Gy at the center in the width direction of the glass film G.

More specifically, the cutting device 2 includes: a conveying unit 10 for conveying the glass film G to the downstream side in a substantially horizontal posture; a local heating unit 11 that applies a laser beam L to the glass film G placed on the conveying unit 10 to perform local heating; and a cooling unit 12 that injects the refrigerant W. Then, the glass film G is conveyed downstream by the conveyance unit 10, and thermal stress is generated in the glass film G by expansion due to local heating and contraction due to cooling due to the refrigerant, and the ineffective portion Gx of the glass film G is removed by laser cutting. Thereafter, the effective portion Cy of the glass film G (hereinafter referred to as the glass film 13) is conveyed to the winding position 3, and the original winding process a1 is performed.

In the original winding step a1, the mother glass roll 17 is manufactured by winding the protective sheet 15 continuously unwound from the sheet roll 14 around the winding core 16 while being superposed on the outer peripheral surface of the glass film 13. In this case, the protective sheet 15 unwound from the sheet roll 14 is guided by a roller (free roller) 18 toward an overlapping position 19 where it overlaps the glass film 13. This roller 18 functions as a tension roller for applying tension to the protective sheet 15.

The glass film 13 is a thin glass ribbon having a thickness of 300 μm or less, 200 μm or less, 100 μm or less, or 50 μm or less, and 1 μm or more, 5 μm or more, or 10 μm or more. The length of the glass film 13 in the width direction (direction parallel to the axial center of the winding core 16) is 100mm or more, 300mm or more, or 500mm or more. The matters related to the glass film 13 described here are also the same in the subsequent steps a2 to a 4.

On the other hand, the thickness of protective sheet 15 is 1000 μm or less, 500 μm or less, or 300 μm or less, and 10 μm or more, or 20 μm or more. The protective sheet 15 may have a length in the width direction shorter than, longer than, or the same as the length in the width direction of the glass film 13. In this case, as the protective sheet 15, for example, an organic resin film (synthetic resin film) such as an ionomer film, a polyethylene film, a polypropylene film, a polyvinyl chloride film, a polyvinylidene chloride film, a polyvinyl alcohol film, a polyester film, a polycarbonate film, a polystyrene film, a polyacrylonitrile film, an ethylene-vinyl acetate copolymer film, an ethylene-vinyl alcohol copolymer film, an ethylene-methacrylic acid copolymer film, a nylon (registered trademark) film (polyamide film), a polyimide film, and cellophane can be used. The matters related to protective sheet 15 described here are also the same in steps a2 to a 4.

In this primary winding step a1, as shown in fig. 3, the starting end portion 15a of the protective sheet 15 on the winding start side is fixed to the outer peripheral surface 16a of the winding core 16 by a tape body 20 such as an adhesive tape or an adhesive tape. In contrast, the starting end portion 13a of the glass film 13 on the winding start side is not fixed to the winding core 16 nor to the protective sheet 15. Therefore, in the process of winding the glass film 13 together with the protective sheet 15 as a mother glass roll 17 around the winding core 16 in a roll shape, the glass film 13 is sandwiched only between the inner peripheral surface 15x and the outer peripheral surface 15y of the protective sheet 15.

In this primary winding step a1, a resin film is preferably used as protective sheet 15. In this way, the mother glass roll 17 can be produced without slack by applying an appropriate tension to the protective sheet 15 and without applying a large tension to the glass film 13. The tensile modulus of the protective sheet 15 in this case can be set to 1 to 5 GPa.

In the original winding step a1, the protective sheet 15 is formed such that both ends in the width direction thereof protrude from both ends in the width direction of the glass film 13 in view of protecting the cut end faces at both ends in the width direction of the glass film 13, but the present invention is not limited to this embodiment. That is, both ends in the width direction of the glass film 13 may not protrude from both ends in the width direction of the protective sheet 15, or both ends in the width direction of the protective sheet 15 may be aligned with both ends in the width direction of the glass film 13. The matters described here relating to the widthwise opposite end portions of the glass film 13 and protective sheet 15 are also the same in the subsequent steps a2 to a 4.

As described above, in the original winding step a1, a large tension is not directly applied to the glass film 13 from the winding core 16. In addition, since the glass film 13 is not related to the protective sheet 15, the glass film 13 is not restrained appropriately even when wound. Therefore, while the glass film 13(G) is being formed by the forming apparatus 1, it is less likely to be adversely affected from the winding position 3 side, and accordingly, the thickness of the glass film 13(G) is less likely to vary improperly. Further, the glass film 13(G) may be conveyed while meandering on the conveying means 10 to reach the winding position 3, but the meandering of the glass film 13(G) is not forcibly corrected. Therefore, the forming of the glass film 13(G) is not easily affected by this. Further, when the meandering of the glass film 13(G) is forcibly corrected, a stress such as a twisting force locally acts on the glass film 13 at the time of winding, and there is a possibility that the glass film is damaged or broken. In the original winding step a1, a large winding offset and a large cutting offset occur in the mother glass roll 17 obtained in the step a1, at the cost of the above excellent operational effects.

Next, the guide connection winding step a2 is performed by the roll-to-roll method illustrated in fig. 4. As shown in the drawing, in the guide-coupled winding step a2, the mother glass roll 17 is unwound at the unwinding position 21, and the glass film 13 is wound again around the winding core 24 together with the protective sheet 23 into a roll shape at the winding position 22, thereby performing a process of manufacturing the mother glass roll 25 with the tape guide. In this case, in the illustrated state, the guide (hereinafter referred to as a winding start side guide) 26 is already connected to the winding start side leading end portion 13a1 of the glass film 13 wound around the mother glass roll 25 as the ribbon guide.

Specifically, as shown in fig. 5, the leading end portion 13a1 of the glass film 13 and the terminal end portion 26b of the winding start side guide 26 are connected by a tape body (front and back pair of tape bodies) 27 such as an adhesive tape or a pressure-sensitive adhesive tape. The length of the glass film 13 in the width direction is the same as the length of the winding start side guide 26 (the same applies to a winding end side guide described later), and both ends of the

glass film

13 and 26 in the width direction extend along a straight line in a state where the

glass film

13 and 26 are connected to each other. The leading end 26a of the winding start side guide 26 is fixed to the outer peripheral surface 24a of the winding core 24 by the tape body 28 having the same characteristics as described above. The winding start side guide 26 is fixed to the winding core 24 so as to extend accurately in a direction orthogonal to the axial center of the winding core 24. The leading end portion 23a of the protective sheet 23 is fixed to the outer peripheral surface 26y (or the inner peripheral surface) of the winding start side guide 26 by the tape body 29 having the same characteristics as described above. It is preferable that the entire length of the winding start-side guide 26 (the same applies to a winding end-side guide described later) be longer than the entire length of the conveyance path from the unwinding position 21 to the winding position 22 shown in fig. 4.

Here, fig. 6 is a schematic plan view of a main part showing a preferable coupling structure of the winding start side guide 26 and the glass film 13. As shown in the drawing, in this connection structure, the width direction length W1 of the winding start side guide 26 is shorter than the width direction length W2 of the glass film 13, and the terminal end portion 26b of the winding start side guide 26 and the terminal end portion 13a1 of the glass film 13 are connected via the sheet-like connector 30. Specifically, the width-directional length W3 of the sheet-like connected body 30 is shorter than the width-directional length W1 of the winding start-side guide 26. The starting end portion 30a of the sheet-like connected body 30 is attached to the surface of the vicinity of the terminal end portion 26b of the winding start side guide 26 by the tape body 31 having the same characteristics as described above. The terminal end portion 30b of the sheet-like connected body 30 is adhered to the surface of the glass film 13 near the leading end portion 13a1 by the tape body 32 having the same characteristics as described above. Therefore, the sheet-like connected body 30 is stretched over only one surface of the winding start side guide 26 and the glass film 13. The winding start side guide 26, the glass film 13, and the sheet-like connected body 30 are arranged symmetrically on both sides thereof with respect to the center in the width direction (the center line M in the figure) of all of them. The sheet-like connected body 30 is preferably a resin film having a rectangular shape in plan view, but the shape and material in plan view are not particularly limited.

In the example shown in fig. 5, for convenience, the leading end portion 23a of the protective sheet 23 is fixed at a position closer to the leading end portion 26a in the intermediate portion in the longitudinal direction of the winding-start-side guide 26, but the leading end portion 23a of the protective sheet 23 is preferably fixed at a position closer to the terminal end portion 26b in the intermediate portion in the longitudinal direction of the winding-start-side guide 26. Specifically, it is preferable that the protective sheet 23 is fixed to the winding start side guide 26 after it is confirmed that the winding start side guide 26 is wound around the winding core 24 without winding displacement. In this way, the protective sheet 23 is wound without winding displacement by the pulling action of the winding start side guide 26, and the advantages of shortening the protective sheet 23 and reducing the amount of use thereof can be obtained.

As the protective sheet 23, the same kind of resin film as the protective sheet 15 of the mother glass roll 17 may be used, or a resin film having a smaller expansion/contraction amount against tension than the protective sheet 15 of the mother glass roll 17 may be used.

The manner of manufacturing the mother glass roll 25 with the guide having the peripheral structure of the winding core 24 will be described in more detail with reference to fig. 4. As shown in the figure, the glass film 13 unwound from the mother glass roll 17 at the unwinding position 21 is conveyed to the winding position 22 while being guided by a plurality of rollers 33 functioning as tension rollers. In this case, at the unwinding position 21, the glass film 13 is separated from the protective sheet 15, and the protective sheet 15 is wound as a sheet roll 34. On the other hand, at the winding position 22, the protective sheet 23 unwound from the new sheet roll 35 is superposed on the outer peripheral surface of the glass film 13 so that the protective sheet 23 is always the outermost layer, and is simultaneously wound around the winding core 24.

Then, at the winding position 22, the glass film 13 is cut in the width direction by a cutting device not shown when the winding length of the glass film 13 reaches a predetermined length. Then, a tape having the same characteristics as those described above is attached to the cut end of the glass film 13 and the start end of a guide (hereinafter referred to as "winding end side guide") disposed on the winding end side out of the drawing, and the two are connected together. The connection structure between the winding end side guide and the glass film 13 in this case is preferably the same as that shown in fig. 6 described above. Further, the winding end side guide is also wound around the winding core 24 following the glass film 13. In the winding position 22, when the winding length of the protective sheet 23 reaches a predetermined length, the protective sheet 23 is cut along the width direction thereof, but the protective sheet 23 may be a length that entirely covers the outermost peripheral surface of the glass film 13. In detail, the terminal end portion of the protective sheet 23 may be aligned with or protrude from the terminal end portion of the glass film 13, and if protruding therefrom, may or may not protrude from the terminal end portion of the winding end side guide.

As described above, in the guide-coupled winding step a2, the start end portion 26a of the winding start side guide 26 coupled to the glass film 13 is fixed to the winding core 24, and the start end portion 23a of the protective sheet 23 is fixed to the middle portion in the longitudinal direction of the winding start side guide 26, so that the winding operation of the glass film 13 can be accurately restrained. Therefore, the conveyance of the glass film 13 to the winding position 22 is guided along an accurate path orthogonal to the axial center of the winding core 24, and an appropriate tension is applied to the glass film 13. As a result, the first operation for correcting the large winding displacement occurring in the mother glass roll 17 can be appropriately performed.

Next, the sizing winding step a3 is performed by a roll-to-roll method of the method illustrated in fig. 7. As shown in the drawing, in the sizing and winding step a3, the mother glass roll 25 with the guide is unwound at the unwinding position 36, the glass film 13 is sized at the sizing position 37, and then the sized glass film 46 is wound around the winding core 40 together with the protective sheet 39 again into a roll shape at the winding position 38, thereby performing a process of manufacturing the sized glass roll 41 with the guide. Since the unwinding position 36 and the winding position 38 perform substantially the same processing as the above-described guide connection winding process a2, detailed description of the processing common to both processes a2 and A3 is omitted.

The size adjusting device 42 provided at the size adjusting position 37 includes a conveying unit 43, a local heating unit 44, and a cooling unit 45, as in the cutting device 2 described above, and conveys the glass film 13 toward the downstream side by the conveying unit 43 to generate a thermal stress in the glass film 13. Thus, unnecessary portions at both ends in the width direction of the glass film 13 are removed by laser cutting, and the width dimension of the glass film 13 is adjusted to a predetermined width. Thereafter, the glass film 46 having been adjusted in size is conveyed to the winding position 38, and the size-adjustment winding step a3 is performed. In this case, in the illustrated state, the winding start side guide 47 is already connected to the glass film 46 wound together with the new protective sheet 39 on the glass roll 41 as the size-adjusted tape guide. In this case, too, the entire length of the winding start-side guide 47 (and similarly the winding end-side guide) is preferably longer than the entire length of the conveyance path from the unwinding position 36 to the winding position 38 shown in fig. 7.

Specifically, although the winding start side guide 47 and the glass film 13 before the size adjustment are connected to each other at the start of winding the glass roll 41, the connection structure of the both guides 47 and 13 in this state is preferably the same as that shown in fig. 6. That is, as shown in fig. 6, the glass film 13 before the size adjustment is cut by the laser along the lines to cut X at both ends in the width direction, thereby forming the glass film 46 after the size adjustment. The width-direction length Wc of the glass film 46 after the size adjustment is the same as or substantially the same as the width-direction length W1 of the winding start-side guide 47. In this case, the winding start-side guide 47 and the glass film 13(46) are connected via a sheet-like connecting body 48 having the shortest length in the width direction. Therefore, a sufficient gap exists between the terminal end portion 47b of the winding start side guide 47 and the start end portion 13a1(46a1) of the glass film 13 (46). The laser cleaving described above is started by effectively utilizing the gap. Therefore, smooth and reliable laser cutting can be performed. The winding start side guide 47 of the glass roll 41 obtained in step A3 may be shared with the winding end side guide of the glass roll 25 obtained in step a2 immediately before.

The structure for attaching the winding start side guide 47 to the winding core 40 and the structure for attaching the new protective sheet 39 to the winding start side guide 47 are the same as those shown in fig. 5. Accordingly, the main parts of the components common to both steps a2 and A3 are denoted by parenthesized reference numerals in fig. 5, and detailed description thereof is omitted here.

As described above, in the size-adjusted winding step A3, since the leading end 47a of the winding-start-side guide 47 is fixed to the winding core 40 and the leading end 39a of the protective sheet 39 is fixed to the longitudinal intermediate portion of the winding-start-side guide 47, similarly to the above-described guide-coupled winding step a2, the conveyance of the size-adjusted glass film 46 to the winding position 3 is guided along a more accurate path, in addition to the winding displacement corrected in the above-described guide-coupled winding step a 2. As a result, not only the second operation for correcting the large winding displacement occurring in the mother glass roll 17 can be further appropriately performed, but also the large cutting displacement occurring in the glass film 13 of the mother glass roll 17 can be eliminated, and the glass film 13 can be accurately cut (adjusted in size) to a desired width, and the adjusted glass film 46 with good dimensional accuracy can be obtained.

Next, although the shipping winding process a4 is described, since the process a4 is performed in the same roll-to-roll manner as the above-described manner illustrated in fig. 4, a description of the manner related to the roll-to-roll manner will be omitted here.

In the delivery winding step a4, as shown in fig. 8, the starting end portion 46a of the resized glass film 46 and the ending end portion 49b of the winding-start-side guide 49 are connected by the pair of tapes 50, but the winding-start-side guide 49 may be used as it is as a guide used as the winding-end-side guide in the above-described resizing winding step A3, or may be replaced with a new winding-start-side guide. As shown in the figure, the leading end portion 49a of the winding start side guide 49 is fixed to the outer peripheral surface 51a of the winding core 51 by the tape body 52 having the same characteristic as described above, and the leading end portion 53a of the protective sheet 53 is also fixed to the outer peripheral surface 51a of the winding core 51 by the tape body 54 having the same characteristic as described above. In this case, the protective sheet 53 is fixed to the outer peripheral surface 51a of the winding core 51 while covering and passing over the leading end portion 49a of the winding start side guide 49, but the leading end portion 53a of the protective sheet 53 is preferably fixed to the outer peripheral surface 51a of the winding core 51 by the

tapes

52 and 54 at the same position as the leading end portion 49a of the winding start side guide 49. The terminal end portion of the glass film 46 is connected to the start end portion of the winding end side guide, which is not shown, by a tape, but the winding end side guide may be used as it is as a guide used as the winding start side guide in the above-described sizing winding step a3, or may be replaced with a new winding end side guide.

As described above, in the winding step a4 for shipment, since the protective sheet 53 is fixed to the winding core 51 in addition to the winding start side guide 49, the winding force of the winding core 51 is directly transmitted to the protective sheet 53. Therefore, tension can be applied to the glass film 46 more reliably from the protective sheet 53, and accordingly, the glass roll 55 for shipment can be obtained more appropriately rewound.

Therefore, by executing the shipping winding step a4 after the above-described preceding steps a1 to A3 are executed, it is possible to obtain a high-quality shipping glass roll 55 in which the winding start-side guide 49 and the winding end-side guide are coupled to the glass film 46, and the glass film 46 is wound around the winding core 51 together with the protective sheet 53 in a roll shape around the winding core 51 in a state where the winding start-side guide 49 is fixed to the winding core 51 and the protective sheet 53 is fixed to the winding core 51.

In this case, in the shipping winding step a4, similarly to the above-described leader connection winding step a2 and the sizing winding step A3 (substantially the same as in the above-described embodiment shown in fig. 5), the leading end portion 49a of the winding start side leader 49 may be fixed to the outer peripheral surface 51a of the winding core 51 by the tape body 52, and the leading end portion 53a of the protective sheet 53 may be fixed to the outer peripheral surface (or the inner peripheral surface) of the middle portion in the longitudinal direction of the winding start side leader 49 by the tape body 54.

In this way, a high-quality delivery glass roll 55 in which the winding start-side guide 49 and the winding end-side guide are coupled to the glass film 46, and the glass film 46 is wound around the winding core 51 together with the protective sheet 53 in a roll shape with the winding start-side guide 49 fixed to the winding core 51 and the protective sheet 53 fixed to the winding start-side guide 49 can be obtained.

Fig. 9 illustrates an implementation of the method for manufacturing a glass roll according to another embodiment of the present invention, and illustrates an implementation of the delivery winding step a4 among the respective steps. The other steps a1 to A3 are the same as the embodiment of the method for manufacturing a glass roll according to the embodiment described above, and therefore, the illustration and description thereof are omitted.

As shown in this figure, in the delivery winding step a4 according to the other embodiment, the one surface 56x of the laminating film 56 having the adhesive surface is attached to the one surface 46x of the glass film 46 having the adjusted size and is simultaneously conveyed to the winding position 57, and the protective sheet 53 is wound while being interposed between the other surface 56y of the laminating film 56 and the other surface 46y of the glass film 46 at the winding position 57. In this case, since the point that the winding start-side leader 49 and the winding end-side leader are connected to the glass film 46 and the point that the start end portion 49a of the winding start-side leader 49 is fixed to the outer peripheral surface 51a of the winding core 51 are the same as those described in the above-described embodiment, the same reference numerals are used for the common components and the illustration and description thereof are omitted. In step a4, protective sheet 53 is merely interposed between glass film 46 and laminating film 56 without being fixed to winding core 51. Thus, the amount of protective sheet 53 used can be reduced, and winding displacement and wind-up can be prevented. In step a4, the leading end portion 53a of protective sheet 53 may be fixed to the outer peripheral surface 51a of winding core 51 together with the leading end portion 49a of winding start side guide 49, as in the above-described embodiment. The laminating film 56 may have an adhesive surface not only on the one surface 56x but also on the other surface 56 y.

By executing the delivery take-up process a4, the following high-quality delivery glass roll 58 can be obtained: the winding start side guide 49 and the winding end side guide are connected to the glass film 46, the laminate film 56 is stuck to one surface 46x of the glass film 46, and the glass film 46 is wound around the winding core 51 together with the protective sheet 53 in a roll shape in a state where the winding start side guide 49 is fixed to the winding core 51 and the protective sheet 53 is sandwiched between the other surface 46y of the glass film 46 and the laminate film 56 without being fixed to the winding core 51.

In the above embodiment, the conveyance path of the glass film 13 is set to be remote by using the plurality of rollers 33 as shown in fig. 4 and 7 in the guide connection winding step a2, the size adjustment winding step A3, and the delivery winding step a4, but the glass film 13 may be conveyed without being set to be remote by reducing the number of rollers 33 or the like.

In the above embodiment, in the delivery winding step a4, the sheet-like connected member is not used in the connection structure between the winding start side guide 49 (and the winding end side guide) and the glass film 46 whose size has been adjusted, but may be used as needed.

Description of the reference numerals

13a glass film;

15 protecting a sheet;

16 winding cores;

17, rolling the mother glass;

23 protecting a sheet;

24 cores;

25 parent glass roll with guide;

26 winding start side guide;

39a protective sheet;

40 roll cores;

41 size-adjusted glass roll with guide member;

46 size-adjusted glass film;

46x one side of the glass film;

the other side of the 46y glass film;

47 winding start side guide;

49 winding start side guide;

51a roll core;

53a protective sheet;

55, delivering glass rolls;

56 a film for lamination;

56x one side of the film for lamination;

58 shipping rolls of glass;

a1 original coiling step;

a2 guide connection winding step;

a3 size adjustment winding step;

a coiling step for shipment of a 4.

Claims

1. A method for manufacturing a glass roll, characterized in that,

the method for manufacturing the glass roll comprises the following steps:

a raw winding step of winding the glass film, which is conveyed while being formed, around a winding core together with a protective sheet, thereby producing a mother glass roll;

a guide connection and winding step of unwinding the mother glass roll and winding the glass film around a winding core together with a protective sheet, and a step of connecting guides to both longitudinal end portions of the glass film to produce a mother glass roll with a guide;

a size-adjusting winding step of unwinding the mother glass roll with the guide, winding the glass film around a winding core together with a protective sheet, and cutting the glass film in a longitudinal direction to a predetermined width to produce a size-adjusted glass roll with the guide; and

a delivery winding step of unwinding the glass roll with the adjusted size ribbon guide, winding the glass film around a winding core together with a protective sheet again, and rewinding the glass film for delivery to produce a delivery sized glass roll with the adjusted size ribbon guide,

in the delivery winding step, the winding is performed by fixing the guide to the core and the protective sheet to the core.

2. The method for manufacturing a glass roll according to claim 1,

in the take-up for shipment step, the guide and the protective sheet are fixed at the same location.

3. The method of manufacturing a glass roll according to claim 1 or 2,

in the primary winding step, winding is performed by fixing the protective sheet to the winding core without fixing the glass film to the winding core.

4. The method of manufacturing a glass roll according to claim 1 or 2,

in the guide member coupling and winding step and the size adjustment and winding step, winding is performed by fixing the guide member to the winding core and fixing the protective sheet to the guide member.

5. A method for manufacturing a glass roll, characterized in that,

the method for manufacturing the glass roll comprises the following steps:

in the delivery winding step, the laminating sheet is bonded to one surface of the glass film via an adhesive surface of the laminating sheet, the guide is fixed to the winding core, and the protective sheet is interposed between the other surface of the glass film and a surface of the laminating sheet opposite to the adhesive surface, thereby performing winding.

6. The method for manufacturing a glass roll according to claim 5,

in the delivery winding step, the protective sheet is wound without being fixed to the core.

7. The method of manufacturing a glass roll according to claim 5 or 6,

8. The method of manufacturing a glass roll according to claim 5 or 6,

9. A glass roll for shipment, in which a glass film is wound in a roll form around a winding core together with a protective sheet, characterized in that,

the guide is fixed to the winding core, and the protective sheet is interposed between the other surface of the glass film and a surface of the laminate film opposite to the adhesive surface without being fixed to the winding core.