CN116323448A

CN116323448A - Method for manufacturing glass roll

Info

Publication number: CN116323448A
Application number: CN202180068639.1A
Authority: CN
Inventors: 村田宪一; 猪饲直弘
Original assignee: Nippon Electric Glass Co Ltd
Current assignee: Nippon Electric Glass Co Ltd
Priority date: 2020-11-27
Filing date: 2021-11-18
Publication date: 2023-06-23
Also published as: JPWO2022113885A1; TW202229006A; WO2022113885A1

Abstract

The method for manufacturing the glass roll comprises the following steps: a supply step of supplying a glass film; a cutting step of cutting the glass film by irradiating the glass film with laser light from a laser irradiation device; a winding step of winding the glass film after the cutting step in a roll shape by a winding device; and a downstream adjustment step of adjusting the position of the glass film after the cutting step by a downstream adjustment device provided between the laser irradiation device and the winding device.

Description

Method for manufacturing glass roll

Technical Field

The present invention relates to a method of manufacturing a glass roll.

Background

In recent years, mobile terminals such as smart phones and tablet PCs, which are rapidly spreading, are required to be thin and lightweight, and thus, the demand for thinning of glass substrates to be mounted on these terminals is also increasing. Under such circumstances, development and production of a glass film, which is a glass substrate thinned into a film shape (for example, a thickness of 300 μm or less), have been advanced.

The glass film manufacturing process may include a process of winding a ribbon-shaped base glass film serving as a raw material of the glass film in a roll shape to manufacture a glass roll. For example, patent document 1 discloses a method for producing a glass roll including a forming step, an ear removing step, a first winding step, a take-out step, a cutting step, and a second winding step.

In this manufacturing method, first, in the forming step, a base material glass film is continuously formed by the overflow downdraw method. Next, in the ear removing step, laser light is irradiated from the laser irradiation device to the base glass film, and unnecessary ears located at both ends in the width direction of the base glass film are removed, thereby forming a first glass film. In the first winding step, the first glass film is wound with a winding core, thereby forming a first glass roll.

Then, in the take-out step, the glass film is taken out from the first glass roll, and in the cleaving step, the first glass film is irradiated with laser light from the laser irradiation apparatus. Thus, the end portion in the width direction of the first glass film is removed as an unnecessary portion (non-product portion), and a second glass film is formed. Finally, in the second winding step, the second glass film is wound with the winding core, thereby manufacturing a second glass roll.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open publication No. 2019-48734

Disclosure of Invention

Problems to be solved by the invention

In the above-described method for producing a glass roll, the second glass film conveyed after the cutting step may be inclined or meandering. This is caused by the difference in length of one end portion in the width direction of the second glass film from the other end portion in the width direction. When the degree of skew or meandering increases, an undesirable effect may be exerted on the upstream-side cleaving step.

That is, when the second glass film is tilted or meandering, the upstream portion of the second glass film may be pulled by the downstream portion and broken. In addition, there are cases where the upstream side portion of the second glass film is broken by contact with an unnecessary portion separated from the first glass film.

The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress meandering and tilting during conveyance of a glass film.

Means for solving the problems

The present invention is a method for producing a glass roll for solving the above-described problems, comprising: a supply step of supplying a glass film; a cutting step of cutting a part of the glass film by irradiating the glass film with laser light from a laser irradiation device; a winding step of winding the glass film after the cutting step in a roll shape by a winding device; and a downstream adjustment step of adjusting the position of the glass film after the cutting step by a downstream adjustment device provided between the laser irradiation device and the winding device.

As described above, the glass film formed in the cutting step may have a length of one end portion in the width direction different from a length of the other end portion in the width direction. In this method, by adjusting the position of the glass film by the downstream-side adjustment step (downstream-side adjustment means) so as to avoid an excessive difference between the length of one end portion and the length of the other end portion of the glass film, it is possible to suppress skewing and meandering when the glass film is conveyed. This can prevent adverse effects from affecting the cutting process performed by the upstream laser irradiation apparatus.

In the supplying step of the present method, the glass film may be supplied by an unreeling device capable of feeding the glass film from a roll of the glass film wound in a roll shape, and the method may further include an upstream adjusting step of adjusting a position of the glass film supplied from the unreeling device by an upstream adjusting device provided between the unreeling device and the laser irradiation device.

The glass film supplied from the unreeling device to the laser irradiation device may have a length of one end portion in the width direction different from a length of the other end portion in the width direction. If the difference in length is too large, wrinkles may occur in the glass film supplied to the laser irradiation apparatus, which may hinder cutting of the glass film. In the present method, the position of the glass film is adjusted by the upstream adjustment step so as to avoid the difference in length from becoming excessive, whereby the glass film can be cut accurately in the cutting step.

In the present method, the amount of positional adjustment of the glass film after the cutting step by the downstream side adjustment device may be smaller than the amount of positional adjustment of the glass film supplied from the unreeling device by the upstream side adjustment device. According to this configuration, the position of the glass film can be adjusted relatively largely by the upstream-side adjusting device, and the position of the glass film can be finely adjusted by the downstream-side adjusting device. This can prevent adverse effects from affecting the cutting process by the laser irradiation apparatus.

The method may further include a positioning step of positioning the glass film after the cutting step by using an adsorption belt conveyor provided between the laser irradiation device and the downstream-side adjustment device.

By preventing positional displacement of the glass film in the positioning step, the glass film can be cut accurately in the cutting step on the upstream side of the suction belt conveyor.

The downstream side adjustment device may further include a conveying roller that contacts the glass film after the cutting step so as to have a peripheral angle. This enables the position of the glass film to be reliably adjusted in the downstream adjustment step.

The upstream-side adjusting device may further include a conveying roller that contacts the glass film supplied from the unreeling device so as to have a peripheral angle. This enables the position of the glass film to be reliably adjusted in the upstream-side adjustment step.

Effects of the invention

According to the present invention, meandering and tilting during conveyance of the glass film can be suppressed.

Drawings

Fig. 1 is a side view showing a glass roll manufacturing apparatus according to a first embodiment.

Fig. 2 is a plan view of the second cut-off portion.

Fig. 3 is a front view of the downstream side adjustment device.

Fig. 4 is a plan view of the downstream side adjusting device.

Fig. 5 is a flow chart illustrating a method of manufacturing a glass roll.

Fig. 6 is a plan view showing the downstream side adjustment step.

Fig. 7 is a side view showing a device for manufacturing a glass roll according to a second embodiment.

Fig. 8 is a plan view of the upstream side adjusting device and the second cutting portion.

Fig. 9 is a flow chart illustrating a method of manufacturing a glass roll.

Fig. 10 is a side view showing a glass roll manufacturing apparatus according to the third embodiment.

Fig. 11 is a side view of the downstream side adjusting device.

Fig. 12 is a plan view of the downstream side adjusting device.

Fig. 13 is a plan view of the downstream side adjusting device.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 to 6 show a first embodiment of a method for manufacturing a glass roll according to the present invention.

Fig. 1 shows an apparatus for manufacturing a glass roll used in the present method. The manufacturing apparatus 1 includes: a forming unit 2 for forming a band-shaped base material glass film G; a direction conversion unit 3 for converting the traveling direction of the base material glass film G from the vertically lower direction to the horizontally lower direction; a first conveyance unit 4 that conveys the base material glass film G in the lateral direction after the direction is changed; a first cutting section 5 for cutting both ends of the base material glass film G in the width direction to form a first glass film G1; and a first winding device 6 for winding the first glass film G1 in a roll shape to obtain a first glass roll GRL1.

The manufacturing apparatus 1 further includes: an unreeling device 7 that feeds the first glass film G1 from the first glass roll GRL 1; a second conveying unit 8 that conveys the first glass film G1 supplied from the unreeling device 7; a second cutting section 9 for cutting a part of the first glass film G1 to form a second glass film G2; and a second winding device 10 for winding the second glass film G2 in a roll shape to obtain a second glass roll GRL2.

The forming section 2 includes: a forming body 11 having a substantially wedge-shaped cross section and an overflow groove 11a formed at an upper end portion thereof; edge rollers 12 disposed directly below the forming body 11 and sandwiching the molten glass GM formed by the forming body 11 from both front and back sides; and an annealing furnace 13 provided directly below the edge roll 12.

The forming section 2 causes the molten glass GM overflowed from the overflow trough 1a of the forming body 11 to flow down along both side surfaces of the forming body 11, and merges the molten glass GM at the lower end portions thereof to form a film. The edge roller 12 regulates the width direction shrinkage of the molten glass GM to adjust the width direction dimension of the base glass film G. The annealing furnace 13 is used to apply strain relief treatment to the base glass film G. The annealing furnace 13 has annealing rolls 14 arranged in a plurality of stages in the up-down direction.

A backup roll 15 for sandwiching the base material glass film G from both front and back sides is disposed below the annealing furnace 13. Tension is applied to the base material glass film G between the backup roller 15 and the edge roller 12 or between the backup roller 15 and the annealing roller 14 at any position to contribute to the thin base material glass film G.

The direction conversion unit 3 is provided below the support roller 15. A plurality of guide rollers 16 for guiding the base glass film G are arranged in a curved shape in the direction changing section 3. These guide rollers 16 guide the base material glass film G conveyed in the vertical direction in the lateral direction.

The first conveying section 4 is disposed in front of (downstream of) the direction conversion section 3. The first conveying section 4 conveys the base material glass film G having passed through the direction changing section 3 downstream along the lateral conveying direction X1.

The first conveying unit 4 may have any structure, and may be configured by one or more belt conveyors, for example. In this case, the first conveying section 4 includes a conveying belt 17, and can convey the base material glass film G by driving the conveying belt 17. The first conveying unit 4 is not limited to this configuration, and a roller conveyor or other various conveying devices may be used.

The first cutting portion 5 is disposed above the first conveying portion 4. In the present embodiment, the first cutting portion 5 is configured to cut the base material glass film G by laser cutting. Specifically, the first cutting portion 5 includes: a pair of laser irradiation devices (hereinafter referred to as "first laser irradiation devices") 18; and a pair of cooling devices (hereinafter referred to as "first cooling devices") 19 disposed on the downstream side of the first laser irradiation device 18.

The first cutting unit 5 irradiates the predetermined portion of the conveyed base material glass film G with the laser light L from each first laser irradiation device 18 and heats the same, and then releases the refrigerant R from the first cooling device 19 to cool the heated portion.

The first winding device 6 is provided downstream of the first conveying section 4 and the first cutting section 5. The first winding device 6 rotates the winding core 20 to wind the first glass film G1 in a roll shape, thereby forming a first glass roll GRL1. The first glass roll GRL1 is transported to the position of the unreeling device 7.

The unreeling device 7 functions as a supply unit that supplies the first glass film G1 to the second conveying unit 8 and the second cutting unit 9. The unreeling device 7 assembles the first glass roll GRL1 transferred from the first reeling device 6, and feeds the first glass film G1 from the first glass roll GRL1 to the second conveying unit 8.

The second conveying section 8 conveys the first glass film G1 and the second glass film G2 by a roll-to-roll method. The second conveying unit 8 conveys the first glass film G1 fed from the first glass roll GRL1 in the unreeling device 7 in the upward direction Z1, and then conveys the first glass film in the lateral conveying direction X2. The second conveying section 8 conveys the second glass film G2 formed by the second cutting section 9 in the lateral conveying direction X2, and then conveys the second glass film G downward Z2 toward the second winding device 10.

Specifically, as shown in fig. 1, the second conveying unit 8 includes: a conveying roller 21 for conveying the first glass film G1 supplied from the unreeling device 7 to the upper direction Z1; an upstream side conveyor 22 located upstream of the second cutting section 9; a downstream conveyor 23 located downstream of the second cutting section 9; a downstream-side adjustment device 24 for adjusting the position of the second glass film G2 during conveyance; and a conveying roller 25 for conveying the second glass film G2 downward Z2.

The upstream conveyor 22 is constituted by a belt conveyor, but is not limited to this configuration. In the present embodiment, the upstream conveyor 22 includes a plurality of belts (hereinafter referred to as "first belts") 26. The first tape 26 contacts the lower surface of the first glass film G1, and supports the first glass film G1 in a horizontal posture. The first tape 26 is configured to convey the first glass film G1 toward the second cutting portion 9 on the downstream side.

Each first belt 26 is constituted by, for example, an endless belt-like belt. As shown in fig. 2, the first belt 26 located at the widthwise center of the plurality of first belts 26 is constituted by an adsorption belt. The first belt (suction belt) 26 has a plurality of suction holes 27 penetrating in the thickness direction. The suction hole 27 is connected to a suction device not shown.

The downstream conveyor 23 is constituted by an adsorption belt conveyor, but is not limited to this configuration. The downstream conveyor 23 includes a plurality of belts (hereinafter referred to as "second belts") 28. The second belt 28 contacts the lower surface of the second glass film G2, and supports the second glass film G2 in a horizontal posture. The second belt 28 is configured to convey the second glass film G2 toward the downstream-side adjustment device 24.

Each second belt 28 is constituted by, for example, an endless belt-like belt. The second belt 28 is constituted by an adsorption belt that adsorbs the second glass film G2, but is not limited to this configuration. As shown in fig. 2, the second belt 28 has a plurality of suction holes 29 penetrating in the thickness direction. The suction hole 29 is connected to a suction device not shown.

As shown in fig. 2, the second cutting unit 9 is disposed in a region between the upstream conveyor 22 and the downstream conveyor 23 in the second conveying unit 8. The second cutting portion 9 is configured to cut the end portions Ga, gb of the first glass film G1 in the width direction by laser cutting. The second cutting unit 9 includes: a pair of laser irradiation devices (hereinafter referred to as "second laser irradiation devices") 30; and a pair of cooling devices (hereinafter referred to as "second cooling devices") 31 disposed downstream of each of the second laser irradiation devices 30.

As shown in fig. 1, a stage 32 is disposed below the second laser irradiation device 30 and the second cooling device 31 so as to be in contact with the lower surface of the first glass film G1. As shown in fig. 2, since the first glass film G1 is cut at two portions in the width direction, the stage 32 is disposed at two portions corresponding to the pair of second laser irradiation devices 30 and the second cooling device 31.

The platform 32 is fixed to the floor surface and is always stationary, and is not shown. The stage 32 includes a plurality of suction ports 33 for sucking the first glass film G1. The suction port 33 is connected to a suction device not shown.

As shown in fig. 1, the downstream-side adjusting device 24 is disposed between the second cutting portion 9 and the second winding device 10. The downstream side adjustment device 24 also functions as a direction conversion unit that changes the conveyance direction of the second glass film G2 from the lateral conveyance direction X2 to the downward direction Z2.

As shown in fig. 3 and 4, the downstream-side adjustment device 24 includes a conveyance roller 34 that contacts the second glass film G2 so as to have an encircling angle, and a driving mechanism 35 that drives the conveyance roller 34.

The conveying roller 34 is constituted by, for example, a free roller. The peripheral angle (center angle) of the second glass film G2 of the conveying roller 34 is preferably 20 ° to 70 °, more preferably 30 ° to 60 °, further preferably 40 ° to 50 °, but is not limited to this range. The conveying roller 34 changes the conveying direction of the second glass film G2 from the lateral conveying direction X2 to the downward direction Z2.

The conveying roller 34 is rotatable about the first axis A1 to convey the second glass film G2 toward the downstream side. The conveying roller 34 is rotatable about a second axis A2 perpendicular to the first axis A1 and extending in the vertical direction. The second axis A2 may be set along a radial direction of the conveying roller 34 passing through a bending apex of the second glass film G2 that is in contact with the conveying roller 34 and is bent (for example, a direction of 45 ° in the case where the second glass film G2 is conveyed by bending 90 ° by the conveying roller 34).

The driving mechanism 35 includes a bearing 36 rotatably supporting the conveyance roller 34 at both ends in the axial direction thereof, a motor 37, and a coupling portion 38 coupling the bearing 36 and the motor 37. The rotation axis of the motor 37 coincides with the second axis A2.

The driving mechanism 35 can rotate the coupling portion 38 around the second axis A2 by the motor 37. The conveyance roller 34 rotates around the second axis A2 by the rotation of the coupling portion 38, and the posture for supporting the second glass film G2 is changed. The driving mechanism 35 adjusts the rotation amount of the shaft portion of the motor 37, and can control the posture of the conveying roller 34.

The second winding device 10 is located downstream of the downstream side adjustment device 24 and below the downstream side adjustment device 24. The second winding device 10 winds the second glass film G2 conveyed by the second conveying section 8 by using the winding core 39 to form a second glass roll GRL2.

As a material of the second glass film G2 (first glass film G1) manufactured by the manufacturing apparatus 1 having the above-described structure, silicate glass and silica glass are used, borosilicate glass, soda lime glass, aluminosilicate glass, and chemically strengthened glass are preferably used, and alkali-free glass is most preferably used. Here, the alkali-free glass means a glass substantially free of alkali components (alkali metal oxides), specifically a glass having a weight ratio of alkali components of 3000ppm or less. The weight ratio of the alkali component in the present invention is preferably 1000ppm or less, more preferably 500ppm or less, and most preferably 300ppm or less.

The thickness of the second glass film G2 (first glass film G1) is 10 μm or more and 300 μm or less, preferably 30 μm or more and 200 μm or less, and most preferably 30 μm or more and 100 μm or less.

A method of manufacturing the second glass roll GRL2 using the manufacturing apparatus 1 having the above-described structure will be described below.

As shown in fig. 5, the method includes a forming step S1, a first cutting step S2, a first winding step S3, a supplying step S4, a second cutting step S5, a downstream side adjusting step S6, and a second winding step S7.

In the molding step S1, the molten glass GM overflowed from the overflow groove 11a of the molded body 11 in the molding section 2 is caused to flow down along both side surfaces of the molded body 11, and the molten glass GM is joined at the lower ends thereof to be molded into a film shape.

At this time, the edge rollers 12 restrict the width-directional shrinkage of the molten glass GM to form a base glass film G having a predetermined width. Thereafter, the base glass film G is subjected to strain relief treatment by the annealing furnace 13 (annealing step). The base glass film G is formed to a predetermined thickness by the tension of the backup roll 15.

In the first cutting step S2, the base material glass film G is conveyed in the transverse conveying direction X1 by the direction conversion unit 3 and the first conveying unit 4, and at the same time, the first cutting unit 5 irradiates a part of the base material glass film G with the laser light L from the first laser light irradiation device 18.

By the irradiation of the laser light L as described above, the base glass film G is heated. After that, when the heated portion of the base material glass film G reaches the position immediately below the first cooling device 19, the heated portion is cooled by receiving the refrigerant R injected downward from the first cooling device 19.

Thermal stress is generated in the base material glass film G by expansion due to local heating by the first laser irradiation device 18 and contraction due to cooling by the first cooling device 19. An initial crack is formed in advance in the base glass film G, and the crack is developed by thermal stress. Thus, both ends (ears) of the base glass film G in the width direction are separated from the base glass film G as non-product portions Gs, thereby forming a first glass film G1.

In the first winding step S3, the first glass film G1 is wound around the winding core 20 in the first winding device 6, thereby forming a first glass roll GRL1. Thereafter, the first glass roll GRL1 is removed from the first winding device 6 and transferred to the unreeling device 7.

In the supply step S4, the first glass film G1 is fed from the first glass roll GRL1 attached to the unreeling device 7. The first glass film G1 is conveyed upward Z1 by the conveying rollers 21 of the second conveying unit 8. Thereafter, the first glass film G1 is conveyed by the upstream conveyor 22 in the transverse conveying direction X2 toward the second cutting section 9.

In the second cutting step S5, the first glass film G1 is conveyed in the transverse conveying direction X2 by the upstream conveyor 22, and at the same time, a part of the first glass film G1 is irradiated with the laser light L by the second laser irradiation device 30.

The first glass film G1 is heated by the irradiation of the laser light L as described above. After that, when the heated portion of the first glass film G1 reaches the position immediately below the second cooling device 31, the portion is cooled by receiving the refrigerant R sprayed downward from the second cooling device 31.

Thermal stress is generated in the first glass film G1 by expansion due to local heating by the second laser irradiation device 30 and contraction due to cooling by the second cooling device 31. An initial crack is formed in advance in the first glass film G1, and the crack is developed by thermal stress. Thereby, both ends Ga, gb of the first glass film G1 in the width direction Y are separated from the first glass film G1 as non-product portions Gs, and a second glass film G2 is formed.

The downstream conveyor 23 conveys the second glass film G2 downstream while sucking it by the second belt 28. Thus, the second glass film G2 is positioned so as to avoid a positional shift in the second glass film G2 (positioning step). In this way, by positioning the second glass film G2 by the downstream conveyor 23, the first glass film G1 can be cut with high accuracy at the cutting position on the upstream side.

In the downstream-side adjustment step S6, the position of the second glass film G2 is adjusted by the downstream-side adjustment device 24 in order to suppress the diagonal movement and meandering of the second glass film G2 conveyed downstream of the downstream-side conveyor 23.

The diagonal movement and meandering of the second glass film G2 can be caused by the difference between the length of the one end portion Ga in the width direction Y and the length of the other end portion Gb in the width direction Y of the second glass film G2. In the downstream-side adjustment step S6, the position of the second glass film G2 is adjusted by changing the posture of the conveying roller 34 of the downstream-side adjustment device 24 so as to avoid an excessive difference in length.

Specifically, as shown in fig. 6, the downstream-side adjustment device 24 changes the conveyance roller 34 from a reference posture (posture indicated by a solid line) in which the first axis A1 is parallel to the width direction Y of the second glass film G2 to an adjustment posture (posture indicated by a two-dot chain line) in which the conveyance roller is rotated about the second axis A2 by a predetermined angle θ1. Thereby, the position of the second glass film G2 in the width direction Y is adjusted. The amount of positional adjustment (positional adjustment angle θ1) of the conveying roller 34 is appropriately set according to the width dimension of the second glass film G2 and the difference in length between the end portions Ga and Gb.

The second conveying section 8 changes the conveying direction of the second glass film G2 from the lateral conveying direction X2 to the downward direction Z2 by the downstream side adjusting device 24, and conveys the second glass film G2 toward the second winding device 10 by the downstream side conveying roller 25.

In the second winding step S7, the second glass film G2 is wound by the winding core 39 in the second winding device 10. The second glass film G2 is wound by a predetermined length, whereby a second glass roll GRL2 is formed in the second winding device 10.

According to the method for producing the second glass roll GRL2 of the present embodiment described above, the position of the second glass film G2 is adjusted in the downstream adjustment step S6 (downstream adjustment device 24), so that diagonal movement and meandering during conveyance of the second glass film G2 can be suppressed. This can prevent the second cutting portion 9 from being affected by the negative effects of the diagonal movement and meandering of the second glass film G2. In addition, the conveying roller 34 of the downstream side adjustment device 24 has an encircling angle with respect to the second glass film G2, and thus can reliably perform position adjustment of the second glass film G2.

Fig. 7 to 9 show a second embodiment of the present invention. As shown in fig. 7, the manufacturing apparatus 1 of the present embodiment can manufacture two second glass rolls GRL2a and GRL2b by forming two second glass films G2a and G2b from one first glass film G1 and winding them.

As shown in fig. 8, the second cutting unit 9 includes three second laser irradiation devices 30 and three second cooling devices 31 for forming two second glass films G2 from one first glass film G1. Three stages 32 for supporting the lower surface of the first glass film G1 are disposed at positions below the respective second laser irradiation apparatuses 30 so as to correspond to the respective second laser irradiation apparatuses 30.

The manufacturing apparatus 1 includes two downstream-

side adjusting devices

24a and 24b for adjusting the positions of the two second glass films G2a and G2b. The downstream

side adjustment devices

24a and 24b have the same configuration as the downstream side adjustment device 24 in the first embodiment.

The manufacturing apparatus 1 further includes an upstream-side adjustment device 40 that adjusts the position of the first glass film G1. The upstream-side adjusting device 40 is disposed between the unreeling device 7 and the second cutting unit 9. The upstream-side adjusting device 40 also functions as a direction switching unit that changes the conveyance direction of the first glass film G1 fed from the unreeling device 7 from the up-down direction (upper direction Z1) to the lateral conveyance direction X2.

The upstream side adjustment device 40 has the same structure as the downstream side adjustment device 24 in the first embodiment. That is, the upstream-side adjusting device 40 includes the conveying roller 34, a motor (not shown), and a connecting portion (not shown) that are in contact with the first glass film G1 supplied from the unreeling device 7 so as to have a wrapping angle. The peripheral angle (center angle) of the first glass film G1 in the conveying roller 34 of the upstream-side adjusting device 40 is desirably 20 ° to 70 °, more desirably 30 ° to 60 °, and further desirably 40 ° to 50 °.

The manufacturing apparatus 1 includes two second winding

devices

10a and 10b for individually winding the two second glass films G2a and G2b formed in the second cutting section 9.

A method of manufacturing the second glass roll GRL2 using the manufacturing apparatus 1 of the present embodiment will be described below.

As shown in fig. 9, the method includes a forming step S11, a first cutting step S12, a first winding step S13, a supplying step S14, an upstream side adjusting step S15, a second cutting step S16, a downstream side adjusting step S17, and a second winding step S18. In the following, the point of difference from the first embodiment will be described.

In the upstream-side adjustment step S15, the first glass film G1 fed from the unreeling device 7 is supplied to the upstream-side adjustment device 40.

The first glass film G1 has a length of one end portion Ga in the width direction Y different from a length of the other end portion Gb in the width direction Y. If the difference in length increases, wrinkles may occur in a part of the first glass film G1 supplied to the second cutting portion 9, which may hinder cutting by the second cutting portion 9.

The upstream-side adjustment device 40 adjusts the position of the first glass film G1 so that the first glass film G1 supplied to the second cutting portion 9 can be cut with high accuracy.

Specifically, as shown in fig. 8, the upstream-side adjustment device 40 changes the conveyance roller 34 from a reference posture (posture indicated by a solid line) in which the first axis A1 is parallel to the width direction Y of the first glass film G1 to an adjustment posture (posture indicated by a two-dot chain line) in which the conveyance roller is rotated about the second axis A2 by a predetermined angle θ2.

The position adjustment amount (position adjustment angle θ2) of the upstream side adjustment device 40 with respect to the first glass film G1 is desirably set to be larger than the position adjustment amount (position adjustment angle θ1) of the downstream

side adjustment devices

24a, 24b with respect to the second glass film G2. That is, the position adjustment amounts of the downstream

side adjustment devices

24a, 24b are desirably set smaller than the position adjustment amount of the upstream side adjustment device 40. According to this configuration, the position of the first glass film G1 can be adjusted relatively large by the upstream-side adjusting device 40, and the position of the second glass film G2 can be finely adjusted by the downstream-side adjusting device 24. This can prevent the second cutting portion 9 from being adversely affected.

In the second cutting step S16, the second glass film G2 is irradiated with the laser light L from each second laser irradiation device 30, and the cooling medium R is sprayed toward the second glass film G2 from each second cooling device 31. Thus, the non-product portion Gs is separated from the first glass film G1, and two second glass films G2a, G2b are formed as product portions. The two second glass films G2a and G2b are conveyed to the second winding

devices

10a and 10b through the downstream

side adjusting devices

24a and 24b (downstream side adjusting step S17).

In the second winding step S18, the two second glass films G2a and G2b are wound individually by the two second winding

devices

10a and 10b. As a result, the second glass rolls GRL2a and GRL2b are formed in the second winding

devices

10a and 10b.

Other structures in this embodiment are the same as those in the first embodiment. In this embodiment, common reference numerals are given to constituent elements common to the first embodiment.

Fig. 10 to 13 show a third embodiment of the present invention. As shown in fig. 10 and 11, the downstream-side adjustment device 24 of the manufacturing apparatus 1 according to the present embodiment includes an edge sensor 41 and a control device 42 that detect the position of the end portion Ga of the second glass film G2 in the width direction Y, in addition to the conveying roller 34 and the driving mechanism 35.

As the edge sensor 41, for example, an optical sensor using an LED or the like is used, but other non-contact sensors may be used. As shown in fig. 10 and 11, the edge sensor 41 includes: a light projecting section 41a disposed below the second glass film G2; and a light receiving unit 41b disposed above the second glass film G2 so as to face the light projecting unit 41 a. The light projecting portion 41a and the light receiving portion 41b are disposed so as to overlap with the end portion Ga of the second glass film G2 in a plan view.

As shown in fig. 11, the edge sensor 41 receives the light LT emitted from the light projecting unit 41a by the light receiving unit 41b. The light LT emitted from the light projecting portion 41a passes through the end portion Ga of the second glass film G2 and reaches the light receiving portion 41b. The edge sensor 41 can detect the position of the end portion Ga of the second glass film G2 in the width direction Y based on the signal of the light LT detected by the light receiving portion 41b.

As shown in fig. 11 and 12, the driving mechanism 35 includes a bearing 36 and a motor 37, but the structure of the motor 37 in this embodiment is different from that in the first embodiment. The motor 37 of the present embodiment is constituted by a linear motor (for example, a linear servo motor).

The motor 37 is provided in a bearing 36 that supports one shaft end 34a of the shaft ends 34a and 34b of the conveying roller 34. The motor 37 includes: a driving unit 43 that moves the bearing 36 in a predetermined direction; and a support table 44 for supporting the driving unit 43. In the present embodiment, the motor 37 is not provided in the bearing 36 supporting the other shaft end 34b of the conveying roller 34, but the motor 37 may be provided in the bearing 36.

The drive section 43 supports, on its upper surface, a bearing 36 associated with one shaft end 34a of the conveying roller 34. As shown in fig. 11 to 13, the driving unit 43 is configured to be movable in the first movement direction D1 or the second movement direction D2.

The support table 44 includes a rail portion (guide portion) 45 for slidably supporting the driving portion 43. The rail portion 45 is formed in a linear shape so as to extend along the transverse conveying direction X2 of the second glass film G2.

In the downstream adjustment step, the motor 37 moves the driving unit 43 along the guide rail portion 45 of the support table 44 in the first movement direction D1 or the second movement direction D2, thereby changing the position of one shaft end 34a of the conveying roller 34 and the bearing 36 thereof. In this case, the conveyance roller 34 rotates around the position of the bearing 36 supporting the other shaft end 34b, and changes its posture.

The control device 42 is connected to the edge sensor 41 and the motor 37. When the end portion Ga of the second glass film G2 is displaced from the predetermined reference position, the control device 42 operates the motor 37 based on the position information of the end portion Ga detected by the edge sensor 41. For example, in fig. 12, when the edge sensor 41 detects that the second glass film G2 is tilted to the left (the end Gb side of the second glass film G2), the control device 42 operates the motor 37 to move the shaft end 34a of the conveying roller 34 and the bearing 36 thereof in the first movement direction D1, and the conveying roller 34 changes the posture from the reference posture indicated by the solid line to the adjustment posture indicated by the two-dot chain line in fig. 13. In contrast, in fig. 12, when the edge sensor 41 detects that the second glass film G2 is tilted to the right (the end Ga side of the second glass film G2), the control device 42 moves the shaft end 34a of the conveying roller 34 and the bearing 36 thereof in the second movement direction D2 in fig. 13.

By adjusting the posture of the conveying roller 34 as described above, the downstream side adjusting device 24 can suppress meandering and tilting of the second glass film G2. The manufacturing apparatus 1 of the present embodiment can efficiently manufacture the second glass film G2 by automatically adjusting the posture of the conveying roller 34 by the edge sensor 41 and the control device 42 of the downstream side adjusting device 24.

Other structures in this embodiment are the same as those in the first embodiment. Common reference numerals are given to constituent elements of the present embodiment that are common to the first embodiment. The manufacturing apparatus 1 of the present embodiment may also have the structure of the upstream side adjusting apparatus 40 of the second embodiment.

The present invention is not limited to the configuration of the above embodiment, and is not limited to the above-described operational effects. The present invention can be variously modified within a range not departing from the gist of the present invention.

In the above embodiment, the example in which the first glass film G1 is supplied by the unreeling device 7 in the supplying step S4 is shown, but the present invention is not limited to this configuration. The present invention can also be applied to a method of manufacturing the first glass roll GRL1.

That is, the first cutting unit 5 of the manufacturing apparatus 1 may have the same structure as the second cutting unit 9. The manufacturing apparatus 1 may further include a downstream-side adjusting device 24 between the first cutting unit 5 and the first winding device 6. The manufacturing apparatus 1 may further include an upstream-side adjustment device 40 between the direction changing section 3 and the first cutting section 5.

In this case, in the supplying step, the base material glass film G is supplied from the forming section 2 and the direction changing section 3 to the first cutting section 5. That is, the forming section 2 and the direction changing section 3 function as a supply section for supplying the glass film (base glass film G) to the first cutting section 5, like the unreeling device 7.

The position of the first glass film G1 formed by cutting the widthwise end portion of the base glass film G by the first cutting portion 5 is adjusted in the downstream side adjustment step.

In the above-described embodiment, the downstream side adjustment device 24 and the upstream side adjustment device 40 adjust the positions of the respective glass films G1, G2 by changing the posture of the conveying roller 34, but the present invention is not limited to this configuration. The downstream-side adjusting device 24 and the upstream-side adjusting device 40 may be provided with a belt conveyor capable of adjusting the positions of the glass films G1 and G2 instead of the conveying rollers 34. The belt conveyor is configured to be able to change its posture (position) to adjust the positions of the glass films G1, G2.

In the above-described embodiment, the configuration in which the posture of the conveying roller 34 of the downstream side adjusting device 24 and the upstream side adjusting device 40 is adjusted by the motor 37 of the driving mechanism 35 has been described, but the present invention is not limited to this configuration. The posture of the conveyance roller 34 may be changed by a manual operation by an operator.

In the second embodiment described above, the description has been made of the configuration of the manufacturing apparatus 1 provided with the upstream side adjustment device 40, but the manufacturing apparatus 1 of the first embodiment may be provided with the upstream side adjustment device 40. The manufacturing apparatus 1 may include a non-contact sensor disposed in correspondence with each end portion Ga, gb for measuring the lengths of the end portions Ga, gb of each glass film G1, G2 in the width direction Y.

Description of the reference numerals

6 first winding device

7 unreeling device

10 second winding device

10a second winding device

10b second winding device

18 first laser irradiation apparatus

23 downstream side conveyor (adsorption belt conveyor)

24 downstream side adjusting device

30 second laser irradiation apparatus

34 carrying roller

G base material glass film

G1 first glass film

G2 second glass film

GRL1 first glass roll

GRL2 second glass roll

GRL2a second glass roll

GRL2b second glass roll

L laser

S2 first cutting procedure

S3 first winding step

S4 supply step

S5 second cutting step

S6 downstream side adjustment step

S7 a second winding step

Position adjustment amount of θ1 downstream side adjustment device for second glass film

And the θ2 upstream side adjusting device adjusts the position of the first glass film.

Claims

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

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

a supply step of supplying a glass film;

a cutting step of cutting a part of the glass film by irradiating the glass film with laser light from a laser irradiation device;

a winding step of winding the glass film after the cutting step in a roll shape by a winding device; and

and a downstream adjustment step of adjusting the position of the glass film after the cutting step by a downstream adjustment device provided between the laser irradiation device and the winding device.

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

in the supplying step, the glass film is supplied by an unreeling device capable of feeding the glass film from a glass roll formed by winding the glass film in a roll shape,

the method for manufacturing the glass roll comprises an upstream side adjustment step of adjusting the position of the glass film supplied from the unreeling device by an upstream side adjustment device arranged between the unreeling device and the laser irradiation device.

3. The method for producing a glass roll according to claim 2, wherein,

the amount of positional adjustment of the glass film after the cutting step by the downstream side adjustment device is smaller than the amount of positional adjustment of the glass film supplied from the unreeling device by the upstream side adjustment device.

4. The method for producing a glass roll according to any of claim 1 to 3, wherein,

the method for manufacturing the glass roll comprises a positioning step of positioning the glass film after the cutting step by using an adsorption belt conveyor arranged between the laser irradiation device and the downstream side adjusting device.

5. The method for producing a glass roll according to any of claims 1 to 4, wherein,

the downstream side adjustment device includes a conveying roller that contacts the glass film after the cutting step so as to have a peripheral angle.

6. The method for producing a glass roll according to claim 2 or 3, wherein,

the upstream-side adjusting device includes a conveying roller that contacts the glass film supplied from the unreeling device so as to have a peripheral angle.