TW201918460A - Method for producing glass film - Google Patents

Abstract

A transport step in a method for producing a glass film G comprises a wrinkle removal step for removing wrinkles from the glass film G by a wrinkle removal unit 20 disposed on the upstream side from a laser irradiation device 25. A cutting step in the method for producing a glass film G involves separating the glass film G by irradiating the glass film G with laser light L after wrinkles Ge are removed from the glass film G in the transport step, and generating a filamentous peeled product Gg from the width-direction end portion of the separated glass film G.

Description

Manufacturing method of glass film

The present invention relates to a method for manufacturing a glass film that can be wound into a roll shape.

As is well known, the glass used in flat panel displays (FPD) such as liquid crystal displays and organic electroluminescence (EL) displays, the plate glass used in organic EL lighting, and the structure of touch panels The sheet glass used in the production of element-reinforced glass and the like, and further the sheet glass used in the panels of solar cells and the like are actually being thinned.

For example, Patent Document 1 discloses a glass film (thin glass) having a thickness of several hundred μm or less. As described in this document, such a glass film is usually continuously formed by a forming apparatus employing a so-called overflow down draw method.

The long glass film continuously formed by the overflow down-draw method, for example, after the conveying direction thereof is changed from the vertical direction to the horizontal direction, the lateral conveyance section (horizontal conveyance section) of the conveyance device continues to convey to the downstream side. During this transport, both ends in the width direction of the glass film are cut and removed. Thereafter, the glass film is wound into a roll shape by a winding roll to constitute a glass roll.

As a technique of cutting both ends of the glass film in the width direction, Patent Document 1 discloses a laser cutting technique. In laser cutting, after an initial crack is formed on a glass film by a crack formation mechanism such as a diamond cutter, the portion is irradiated with laser light and heated. Thereafter, the heated portion is cooled by the cooling mechanism, and the initial crack progresses by the thermal stress generated in the glass film to cut the glass film.

As another cutting method, Patent Document 2 discloses a cutting technology of a glass film using a so-called peeling phenomenon. The technology is that while a glass film (glass substrate) is transported, a part of the glass film is irradiated with laser light while being fused, and the fused part is cooled away from the laser light irradiation area.

In this case, because the fusible part is cooled, a substantially filament-like peeling material (precipitate) is generated (for example, refer to paragraph 0044 and FIG. 3 of Patent Document 2). The phenomenon in which the filamentary peeling material is peeled from the end of the glass film is generally referred to as a peeling phenomenon. Since a filament-like peeling material is generated, a uniform cut surface is formed on the glass film. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2012-240883 [Patent Document 2] International Publication No. 2014/002685

[Problems to be Solved by the Invention] Since the glass film has flexibility, wrinkles may be generated in the glass film in the middle of being transported in the horizontal direction by the horizontal transport section. When a wrinkle is generated, a bending stress is generated in the wrinkle and the vicinity thereof. Therefore, when the glass film is irradiated with laser light while the wrinkles are generated, an unexpected bending stress caused by the wrinkles is given to the fused portion. Therefore, there is a problem that it is difficult to cut the glass film with high accuracy.

This invention was made in view of the said situation, The technical subject is when removing a glass film by a peeling phenomenon, it can remove the wrinkles which generate | occur | produce in a glass film suitably, and can cut a glass film with high precision. [Means for solving problems]

The present invention is to solve the above-mentioned problem, and is characterized in that it includes a conveying step of conveying a long glass film from upstream to downstream along its long side direction, and a cutting step of conveying the same by the conveying step. The glass film is irradiated with laser light from the laser irradiation device on one side, thereby separating the glass film; and the conveying step includes a wrinkle removing step, and is disposed closer to the laser irradiation device than the laser irradiation device. The wrinkle removing portion on the upstream side removes the wrinkles of the glass film; the cutting step is performed by irradiating the glass film by removing the wrinkles of the glass film in the conveying step. The laser light separates the glass film, and a filamentous peel is generated from a widthwise end portion of the glass film to be separated.

According to this configuration, after the wrinkles of the glass film are removed by the wrinkle removing portion in the conveyance step, the glass film is cut (fused) by the peeling phenomenon in the cutting step, thereby making it possible to make the glass film uniform. The filament-like peeling object was generated from the width direction edge part of a glass film. Thereby, since the width direction edge part of a glass film can be formed into a uniform cross section, a glass film can be cut | disconnected with high precision.

In the manufacturing method of the said glass film, it is desirable that the said wrinkle removal part includes a rod-shaped member which is located in the lower surface side of the said glass film, and is arrange | positioned along the width direction of the said glass film. In this way, in the wrinkle removing step of the conveying step, the wrinkles of the glass film can be appropriately eliminated by passing the glass film through the rod-shaped member.

In addition, the wrinkle removing portion may include a plate-like member which is arranged between the rod-like member and the laser irradiation device and is arranged on a lower surface side of the glass film. In the wrinkle removal step, the wrinkles of the glass film can be more appropriately eliminated by passing the glass film through the rod-shaped member and the plate-shaped member.

In this case, the upper surface of the plate-like member is desirably located further below the upper end portion of the rod-like member. Accordingly, the wrinkles of the glass film can be gradually eliminated by the rod-shaped member and the plate-shaped member.

The width of the plate-shaped member is desirably set to be smaller than the length of the rod-shaped member.

In the manufacturing method of the glass film, it is preferable that the laser irradiation device is disposed above the glass film, and two laser irradiation devices are arranged at a predetermined interval in the width direction of the glass film, so that The width of the plate-like member is set to be larger than the interval distance of the laser irradiation device. In addition, the width of a plate-shaped member means the dimension of the plate-shaped member in the width direction orthogonal to the longitudinal direction of the glass film to be conveyed.

By setting the width of the plate-like member to be larger than the distance between the two laser irradiation devices as described above, the wrinkles can be reliably eliminated before the glass film reaches the position where the laser light is irradiated.

In this case, the width of the plate-like member is desirably 1.02 times or more the distance between the laser irradiation devices and 0.95 times or less the length of the rod-like member.

In the conveying step, it is desirable that the glass film is conveyed by moving a conveyance sheet that is in contact with a lower surface of the glass film on a platform, and the wrinkle removing portion is provided at a relatively free place The irradiation position of the laser light by the laser irradiation device is further upstream, and is provided on the upper surface where the conveying sheet should be spaced upward from the upper surface of the platform, and the laser On the upstream side of the irradiation position where the light is emitted, the conveyance sheet is in a state of being in contact with the upper surface of the platform.

According to this configuration, the glass film from which the wrinkles have been removed by the wrinkle removing section is stably supported by the upper surface of the platform at the irradiation position of the laser light. This makes it possible to cut the glass film with high accuracy at the irradiation position of the laser light. [Effect of the invention]

According to the present invention, when the glass film is cut by the peeling phenomenon, wrinkles generated in the glass film can be appropriately removed, and the glass film can be cut with high accuracy.

Hereinafter, the form for implementing this invention is demonstrated in detail with reference to drawings. 1 to 6 show a first embodiment of a manufacturing apparatus for implementing the method for manufacturing a glass film of the present invention.

FIG. 1 is a schematic side view schematically showing the overall configuration of a glass film manufacturing apparatus. As shown in FIG. 1, the manufacturing apparatus 1 includes: a forming section 2 that forms a glass film G; a direction conversion section 3 that converts the traveling direction of the glass film G from a vertical direction to a horizontal direction; and a horizontal transfer section 4 that changes the direction after The glass film G is conveyed in the horizontal direction; the cutting section 5 is continuously conveyed in the horizontal direction by the horizontal conveyance section 4 while cutting the widthwise end portion Ga and the end portion Gb of the glass film G as the non-product portion Gc; The winding part 6 winds the product part Gd obtained by cutting and removing the non-product part Gc by the cutting part 5 into a roll shape, and forms a glass roll R.

In the following description, “upstream” (side) refers to a position near the forming section 2 or the glass roll substrate Ra, and “downstream” (side) refers to a position near the winding section 6. The thickness of the product portion Gd in this embodiment is 300 μm or less, preferably 10 μm or more and 200 μm or less, and more preferably 50 μm or more and 100 μm or less, but it is not limited thereto.

The forming section 2 includes a forming body 7 with an overflow groove 7a formed at an upper end portion and a substantially wedge shape in cross-section. An edge roller 8 is disposed directly below the forming body 7 and sandwiches the self-forming body from both sides of the surface. 7 overflowed molten glass; and an annealing furnace 9 provided directly below the edge roller 8.

The molding unit 2 causes molten glass overflowing from the overflow groove 7 a of the molded body 7 to flow down along both side surfaces, and merges at the lower end to form a film-like molten glass. The edge roller 8 restricts the widthwise shrinkage of the molten glass to form a glass film G having a predetermined width. The annealing furnace 9 is used to apply strain relief treatment to the glass film G. The annealing furnace 9 includes a plurality of annealing rollers 10 arranged in the up-down direction.

A support roller 11 is provided below the annealing furnace 9 to hold the glass film G on both sides of the surface. Tension is applied between the support roll 11 and the edge roll 8 or between the support roll 11 and the annealing furnace roll 10 at any place to promote thinning of the glass film G.

The direction changing section 3 is provided below the support roller 11. A plurality of guide rollers 12 for guiding the glass film G are arranged in a curved shape in the direction changing section 3. The guide rollers 12 guide the glass film G conveyed in the vertical direction in the lateral direction.

The lateral conveyance part 4 is arrange | positioned ahead (downstream side) of the traveling direction of the direction conversion part 3. The horizontal transfer unit 4 includes a first transfer device 13, a second transfer device 14, and a third transfer device 15 in this order from the upstream side.

The first conveying device 13 includes an endless belt-shaped conveying belt 16 and a driving device 17 of the conveying belt 16. The first conveying device 13 continuously conveys the glass film G passing through the direction changing section 3 to the downstream side by bringing the upper surface of the conveying belt 16 into contact with the glass film G. The driving device 17 includes a driving body 17 a such as a roller for driving the transport belt 16, a sprocket, and a motor (not shown) that rotates the driving body 17 a.

The second transfer device 14 includes a stage 18 that supports the glass film G, and a sheet 19 for transferring the glass film G.

The stage 18 includes a wrinkle removing section 20 for removing wrinkles Ge generated in the glass film G during transportation. In this embodiment, the wrinkle removing section 20 includes a rod-shaped member 20a. The rod-shaped member 20a is constituted by a member having a cylindrical surface, but is not limited to this shape. In order to remove the wrinkles Ge of the glass film G, the rod-shaped member 20 a may have a curved surface that is convex upward, and may be configured to have a semicircular shape or an oval shape in cross-section.

As shown in FIG. 3, the rod-shaped member 20a is fixed to the upper surface 18a of the platform 18, but it is not limited to this form. The rod-shaped member 20 a may be configured to be rotatable at a position spaced upward from the upper surface 18 a of the platform 18. In this case, the rod-shaped member 20a may be idly rotated or may be rotationally driven by the driving mechanism. The diameter D of the rod-shaped member 20a is set to 2 mm or more and 100 mm or less, but is not limited to this range, and can be appropriately set depending on the size of the glass film G or the product portion Gd, and the like. Moreover, when the rod-shaped member 20a is other than a cylindrical shape (for example, a triangular columnar shape or a semi-cylindrical shape), the height of the rod-shaped member 20a is preferably 10 mm or more and 100 mm or less, and communicates with the glass via the transport sheet 23 The radius of curvature of the contact portion is preferably R1 mm or more and R100 mm or less.

The rod-shaped member 20 a is arranged along the width direction W of the glass film G. That is, the rod-shaped member 20 a is disposed on the upper surface 18 a of the stage 18 so as to be orthogonal to the longitudinal direction of the glass film G.

As shown in FIGS. 2 and 4, the length LR of the rod-shaped member 20 a is set to be shorter than the width WG of the glass film G.

In the width direction end portion Ga and the end portion Gb of the glass film G, a portion (hereinafter referred to as an "ear portion") Gf having a thickness greater than that of the center portion is formed. When the rod-shaped member 20a is disposed on the lower surface side of the glass film G, the length LR of the rod-shaped member 20a is set so as not to overlap the ear Gf. That is, the length LR of the rod-shaped member 20a is desirably shorter than the width WC of the portion of the glass film G that does not include the center portion in the width direction of the ear portion Gf. As a result, the rod-shaped member 20a supporting the glass film G does not support the ear portion Gf of the glass film G, but supports a portion closer to the widthwise center than the ear portion Gf of the glass film G. The length LR of the rod-shaped member 20a is preferably 1.1 times or more the interval distance DL of the laser irradiation device 25 and 0.98 times or less the width WC of the central portion of the glass film G.

The transporting sheet 19 is made of, for example, a foamed resin sheet, but is not limited to this material. The conveying sheet 19 is drawn out from a sheet roll 21 disposed below the platform 18 and moves on the platform 18 from an upstream side to a downstream side (see FIG. 1). The conveyance sheet 19 is in contact with the lower surface of the glass film G on the platform 18, and the glass film G is conveyed to the downstream side by the movement thereof. After passing the upper surface 18 a of the platform 18, the conveying sheet 19 is collected by a winding device (not shown) at a position below the platform 18.

The width WS of the conveying sheet 19 is set to be longer than the length LR of the rod-shaped member 20a. The width WS of the conveyance sheet 19 is set to be smaller than the width WG of the glass film G. More specifically, the width WS of the conveyance sheet 19 is desirably set to be smaller than the width WC of the portion of the glass film G that does not include the central portion in the width direction of the ear portion Gf (see FIG. 4).

The thickness TS of the transporting sheet 19 is set to 0.05 mm or more and 2 mm or less, but is not limited to this range. The thickness G of the glass film G can be appropriately set so that the ear portion Gf of the glass film G does not contact the upper surface 18 a of the stage 18.

The third transfer device 15 includes a stage 22 that supports the glass film G, and a sheet 23 for transferring the glass film G. The third conveying device 15 moves the conveying sheet 23 drawn out from the sheet roll 24 disposed below the upstream side of the platform 22 on the platform 22 to the downstream side, and cuts the glass cut by the cutting unit 5. The non-product portion Gc and the product portion Gd of the film G are conveyed downstream.

As shown in FIG. 1 and FIG. 2, the cutting section 5 is disposed between the second conveying device 14 and the third conveying device 15 of the horizontal conveying section 4. The cutting unit 5 includes a laser irradiation device 25, a stage 26 that supports a glass film, and a recovery device 27 that recovers the filamentous peeling material Gg generated by irradiating the laser light L of the laser irradiation device 25 to the glass film G. .

The laser irradiation device 25 is disposed above the platform 26, and is located further downstream than the wrinkle removing portion 20. The laser irradiation device 25 is configured to irradiate other laser light L such as a CO ₂ laser and a Yttrium-Aluminum Garnet (YAG) laser downward. In the present embodiment, two laser irradiation devices 25 are arranged to cut off both ends Ga and Gb of the glass film G in the width direction (see FIG. 2).

The laser light L irradiates the glass film G at a predetermined position (irradiation position) O. The distance D1 between the irradiation position O and the rod-shaped member 20a of the wrinkle removing portion 20 is set to 200 mm or more and 2000 mm or less. However, the distance D1 is not limited to this range, and it depends on the size of the glass film G and the rod-shaped member 20a. The size is set appropriately.

The platform 26 has an opening portion 26 a penetrating in the vertical direction. The irradiation position O of the laser light L of the laser irradiation device 25 is provided in the range of this opening part 26a.

As shown in FIGS. 2 and 3, the recovery device 27 is disposed below the platform 26. The recovery device 27 is composed of a belt conveyor 27a. In this embodiment, two belt conveyors 27a are arranged corresponding to each of the end portions Ga and the end portions Gb of the glass film G. Each of the belt conveyors 27 a conveys the filamentous peeling material Gg in a direction (width direction) orthogonal to the conveyance direction (length direction) of the glass film G, that is, from the inside to the outside in the width direction of the glass film G.

The winding section 6 is provided on the downstream side of the third transfer device 15. The winding section 6 includes a winding roller 28, a motor (not shown) that rotationally drives the winding roller 28, and a protective sheet supply section 29 that supplies a protective sheet 29 a to the winding roller 28. The winding section 6 overlaps the protective sheet 29a fed from the protective sheet supply section 29 with the product section Gd while rotating the winding roller 28 by a motor to wind the product section Gd into a roll shape. The rolled product portion Gd is configured as a glass roll R.

Hereinafter, a method for manufacturing the glass roll R by the manufacturing apparatus 1 having the above-mentioned configuration will be described. The manufacturing method of the glass roll R includes a forming step of forming a strip-shaped glass film G by the forming section 2; a conveying step of conveying the glass film G by the direction changing section 3 and the lateral conveying section 4; and a cutting step of using the cutting section 5 cutting the width direction end portion Ga and the end portion Gb of the glass film G; and a winding step of winding the product portion Gd by the winding portion 6 after the cutting step.

In the forming step, the molten glass overflowing from the overflow groove 7a of the formed body 7 of the forming section 2 is caused to flow down along both side surfaces, and merges at the lower end to form a film-like molten glass. At this time, the edge roller 8 restricts the widthwise shrinkage of the molten glass to form a glass film G having a predetermined width. Thereafter, strain relief treatment (slow cooling step) is applied to the glass film G in the annealing furnace 9. The glass film G is formed to a predetermined thickness by the tension of the support roller 11.

In the conveyance step, the conveyance direction of the glass film G is changed to the horizontal direction by the direction conversion unit 3, and the glass film G is conveyed toward the winding unit 6 on the downstream side by each of the conveying devices 13 to 15.

A plurality of wrinkles Ge are irregularly generated on the glass film G during the transfer by the lateral transfer unit 4. These wrinkles Ge disappear by the glass film G passing through the wrinkle removing section 20 of the second conveying device 14 (wrinkle removing step). That is, when the glass film G passes through the rod-shaped member 20 a of the wrinkle removing section 20, the glass film G is pressed together with the conveying sheet 19 by the rod-shaped member 20 a located on the lower surface side of the glass film G to the upper surface 18 a of the platform 18. Further up. At this time, the wrinkles Ge of the glass film G disappear by the glass film G being stretched by the rod-shaped member 20a.

When the conveyance sheet 19 passes through the rod-shaped member 20a, it is lifted by the rod-shaped member 20a. Thereby, a part of the conveying sheet 19 on the upstream side of the rod-shaped member 20 a and a portion of the conveying sheet 19 on the downstream side from the rod-shaped member 20 a are separated from the upper surface 18 a of the platform 18. As shown in FIG. 3, the separation distance between the transporting sheet 19 and the upper surface 18 a of the platform 18 in the vertical direction decreases as the transporting sheet 19 moves downstream from the rod-shaped member 20 a. The conveyance sheet 19 is in contact with the upper surface 18 a of the platform 18 at an upstream side from the irradiation position O of the laser light L of the laser irradiation device 25.

The glass film G is in contact with the upper surface 18 a of the platform 18 by the conveyance sheet 19, and is supported by the platform 18 via the conveyance sheet 19. The conveyance sheet 19 moves the glass film G toward the irradiation position O of the laser light L while maintaining contact with the upper surface 18 a of the stage 18.

In the cutting step, the laser irradiation device 25 from the cutting unit 5 irradiates the glass film G transported by the second transporting device 14 with laser light L, and cuts both ends Ga and end portions of the glass film G in the width direction. Gb. Thereby, the glass film G is separated into the non-product part Gc and the product part Gd.

Specifically, when the laser light L is irradiated to the glass film G (see FIG. 6A), a part of the glass film G is fused by the heating of the laser light L (see FIG. 6B). Since the glass film G is transported by the second transport device 14, the fused portion is far from the laser light L.

Thereby, the fused portion of the glass film G is cooled. The fused portion is thermally strained by being cooled, and the resulting stress acts as a tensile force on the unfused portion. By this action, the filament-shaped peeling material Gg is separated from the widthwise end portion of the non-product portion Gc and the widthwise end portion of the product portion Gd. The separated filamentous strip Gg moves downward due to its own weight (see FIG. 6C). The filamentous exfoliation Gg is deformed into a spiral shape after being separated from the non-product portion Gc or the product portion Gd. In the cutting step, the filiform exfoliation Gg generated from the non-product portion Gc and the product portion Gd is recovered by the recovery device 27 (recovery step).

In addition, the non-product part Gc is conveyed to the downstream side by the third conveying device 15, and is recovered on the upstream side of the winding part 6 by another recovery device (not shown).

In the winding step, the protective sheet 29 a is supplied from the protective sheet supply unit 29 to the product portion Gd, and the product portion Gd conveyed by the third conveying device 15 is wound into a roll by the winding roller 28 of the winding portion 6. shape. The glass roll R is completed by winding the product portion Gd of a predetermined length by the winding roller 28.

According to the manufacturing method of the glass film G of this embodiment described above, in the cutting step, the wrinkle Ge of the glass film G is removed by the wrinkle removing portion 20 (the rod-shaped member 20a), and then the glass film G is performed. Can be cut, and the product portion Gd can be cut out from the glass film G with high accuracy. At the irradiation position O of the laser light L of the laser irradiation device 25, the glass film G is stably supported on the upper surface 18 a of the stage 18 via the conveyance sheet 19. Thereby, a uniform filamentous peel Gg can be generated from the product part Gd, and the cut surface of the product part Gd can be made uniform, and a high-quality glass film G (glass roll R) can be manufactured.

7 to 10 show a second embodiment of the apparatus and method for manufacturing a glass film. In this embodiment, the configuration of the second conveying device 14, the third conveying device 15, and the cutting section 5 of the lateral conveying section 4 is different from that of the first embodiment.

As shown in FIGS. 7 to 9, the wrinkle removing section 20 of the second conveying device 14 includes a plate-shaped member 20 b disposed on the downstream side of the rod-shaped member 20 a in addition to the rod-shaped member 20 a of the first embodiment. .

The plate-like member 20b is arranged between the rod-like member 20a and the laser irradiation device 25 in the conveyance direction of the glass film G. The plate-like member 20 b is fixed to the upper surface 18 a of the platform 18. The width WP of the plate-like member 20b (the length of the plate-like member 20b in the width direction of the glass film G) is set to be shorter than the length LR of the rod-like member 20a. The width WP of the plate-like member 20b is preferably 1.02 times or more the separation distance DL of the laser irradiation device 25 and 0.95 times or less the length LR of the rod-like member 20a. The length LP of the plate-like member 20b in the conveyance direction of the glass film G is desirably set to 10 mm or more and 500 mm or less. However, the length LP is not limited to this range, and is appropriately set according to the sizes of the glass film G and the product portion Gd. .

The thickness TP of the plate-like member 20b is set to be smaller than the diameter D of the rod-like member 20a. Therefore, the upper surface 20c of the plate-like member is located below the upper end portion 20d of the rod-like member 20a. The thickness TP of the plate-like member 20b is set to 1 mm or more and 95 mm or less. However, the thickness TP is not limited to this range, and is appropriately set according to the diameter D of the rod-like member 20a. The height difference between the upper surface 20c of the plate-like member 20b and the upper end portion 20d of the rod-like member 20a is preferably 3 mm or more and 50 mm or less.

In the conveyance direction of the glass film G, the distance D2 between the irradiation position O of the laser light L of the laser irradiation device 25 and the plate-like member 20b is set to 50 mm or more and 1950 mm or less, but it is not limited to this range, but It is appropriately set in accordance with the sizes of the glass film G and the product portion Gd. The distance D3 between the plate-shaped member 20b and the rod-shaped member 20a in the conveyance direction of the glass film G is preferably 50 mm to 1500 mm.

The third conveying device 15 includes a plurality of (three in this example) conveying belts 30 a to 30 c for conveying the glass film G, and a driving device 31 for each of the conveying belts 30 a to 30 c. As shown in FIG. 8, the conveyance belt 30 a to the conveyance belt 30 c are formed in an endless belt shape, and include a first conveyance belt 30 a that is in contact with a portion on the Ga side of the width direction one end portion of the glass film G and a width direction of the glass film G The second conveyance belt 30b that is partially in contact with the other end portion Gb side and the third conveyance belt 30c that is in contact with the widthwise central portion of the glass film G. The driving device 31 includes a driving body 31a such as a roller and a sprocket for driving each of the conveying belts 30a to 30c, and a motor (not shown) that rotates the driving body 31a.

As shown in FIG. 8, each of the conveyance belts 30 a to 30 c is partitioned in the width direction of the glass film G. Thereby, a gap is formed between the first conveyance belt 30a and the third conveyance belt 30c, and between the second conveyance belt 30b and the third conveyance belt 30c.

The laser irradiation device 25 of the cutting unit 5 is disposed above the third transfer device 15. The irradiation position O of the laser light L of the laser irradiation device 25 is set so as to correspond to the gap between each of the transfer belts 30a to 30c. The cutting unit 5 of the present embodiment does not include the stage 26 of the first embodiment, but may include a stage that can be placed in a gap between each of the transfer belts 30a to 30c. The recovery device 27 is disposed inside each of the transporting belts 30a and 30b so as to cross the first transporting belt 30a and the second transporting belt 30b.

When the glass film G (glass roll R) is manufactured by the manufacturing apparatus 1 of this embodiment, the forming step, the conveying step, the cutting step, and the winding step are performed in the same manner as in the first embodiment. The appearance of the wrinkle removing step is different from that of the first embodiment.

In the wrinkle removing step, first, the glass film G passes through the rod-shaped member 20 a provided on the platform 18 of the second conveying device 14. At this time, the glass film G is pressed together with the conveying sheet 19 by the rod-shaped member 20 a located on the lower surface side of the glass film G to a position higher than the upper surface 18 a of the stage 18. At this time, the plurality of wrinkles Ge generated on the glass film G disappear by the glass film G being stretched by the rod-shaped member 20a.

When wrinkles Ge remain in the glass film G even after passing through the rod-shaped member 20a, the wrinkles Ge disappear through the glass film G through the plate-shaped member 20b. On the other hand, the rod-shaped member 20 a is in linear contact with the glass film G via the conveyance sheet 19, while the plate-shaped member 20 b is in planar contact through the conveyance sheet 19. As a result, the wrinkles Ge that have not been removed by the rod-shaped member 20 a are surely disappeared by the glass film G passing through the plate-shaped member 20 b.

When the conveyance sheet 19 passes through the rod-shaped member 20a and the plate-shaped member 20b, it is spaced upward from the upper surface 18a of the platform 18, but after passing through the plate-shaped member 20b, it is closer to the irradiation position O of the laser light L The upstream side is in contact with the upper surface 18a. Thus, the glass film G is supported on the upper surface 18 a of the platform 18 at an upstream side from the irradiation position O of the laser light L. Therefore, the glass film G is cut off by the laser irradiation device 25 in a state where the glass film G is stably supported on the upper surface 18 a of the platform 18. Thereby, the uniform filamentous peeling object Gg can be continuously generated from the width direction end of the product portion Gd, and therefore, the cutting of the glass film G can be performed with high accuracy.

In the cutting step of this embodiment, while the glass film G is being conveyed by the third conveying device 15, the laser light L is irradiated from the laser irradiation device 25 disposed above. Thereafter, the filiform strip Gg is recovered by the recovery device 27 (see FIG. 10), and the non-product portion Gc of the glass film G is transported by the first transport belt 30 a and the second transport belt 30 b of the third transport device 15. The three conveying belts 30c convey the product portion Gd. The other steps such as the forming step and the winding step in this embodiment are the same as those in the first embodiment.

11 and 12 show a third embodiment of the apparatus and method for manufacturing a glass film. In the first embodiment and the second embodiment described above, an example of manufacturing the glass film G by the overflow down-draw method is shown. In this embodiment, the manufacturing of the glass film by a roll-to-roll process is exemplified. G (glass roll R).

As shown in FIGS. 11 and 12, the manufacturing apparatus 1 includes a glass roll substrate Ra configured by forming a glass film G as a processing target in a roll shape on the most upstream side, instead of the forming section 2 of the first embodiment. Direction conversion section 3. The glass roll substrate Ra is wound around a supply roll 32. On the downstream side of the glass roll substrate Ra, as in the first embodiment, a lateral conveyance section 4, a cutting section 5, and a winding section 6 are sequentially arranged. The configuration of each of the elements 4 to 6 is the same as that of the first embodiment.

The manufacturing method of the glass film G (glass roll R) according to this embodiment includes a glass film supply step, a conveying step, a cutting step, and a glass film G for drawing out from the glass roll substrate Ra and supplying it to the downstream side. And winding steps. In the glass film supply step, the manufacturing apparatus 1 rotates the supply roller 32 to withdraw the glass film G for processing from the glass roll substrate Ra and move it to the downstream side. The subsequent conveying steps, cutting steps, and winding steps are the same as those in the first embodiment.

In this embodiment, in the cutting step, the glass film G for processing can be separated into a plurality of glass films G, and a part or all of them can be used as a product. In this case, a plurality of winding rollers 28 are arranged in the winding section 6 in accordance with the number of manufactured products.

13 and 14 show a fourth embodiment of a glass film manufacturing apparatus and a method for manufacturing a glass film using the same.

As shown in FIG. 13 and FIG. 14, the manufacturing apparatus 1 includes a glass roll substrate Ra configured by forming a glass film G as a processing target in a roll shape on the most upstream side, instead of the forming section 2 of the second embodiment. Direction conversion section 3. The glass roll substrate Ra is wound around a supply roll 32. On the downstream side of the glass roll substrate Ra, as in the second embodiment, a lateral conveyance section 4, a cutting section 5, and a winding section 6 are sequentially arranged. The configuration of each of the elements 4 to 6 is the same as that of the second embodiment.

In addition, the present invention is not limited to the configuration of the embodiment described above, nor is it limited to the aforementioned effects. The present invention can be variously modified without departing from the gist of the present invention.

In the second embodiment, the wrinkle removing portion 20 including one rod-shaped member 20 a and one plate-shaped member 20 b is exemplified, but the invention is not limited to this. A plurality of rod-shaped members may be arranged on the platform 18. Multiple plate-like members.

1‧‧‧ manufacturing equipment

2‧‧‧forming department

3‧‧‧Direction Conversion Department

4‧‧‧Horizontal Transfer Department

5‧‧‧ cutting section

6‧‧‧ winding section

7‧‧‧ shaped body

7a‧‧‧ overflow tank

8‧‧‧Edge roller

9‧‧‧annealing furnace

10‧‧‧annealing furnace roller

11‧‧‧ support roller

12‧‧‧Guide roller

13‧‧‧ the first transfer device

14‧‧‧Second transfer device

15‧‧‧Third transfer device

16‧‧‧ transport belt

17‧‧‧Drive

17a‧‧‧Driver

18, 22, 26‧‧‧ platforms

18a‧‧‧ The upper surface of the platform

19, 23‧‧‧ Sheets for transport

20‧‧‧ Wrinkle removal section

20a‧‧‧ rod-shaped member

20b‧‧‧ plate member

20c‧‧‧ Upper surface of plate-shaped member

20d‧‧‧ Upper end of rod-shaped member

21, 24‧‧‧ Sheet Roll

25‧‧‧laser irradiation device

26a‧‧‧ opening

27‧‧‧ Recovery device

27a‧‧‧belt conveyor

28‧‧‧ Winding roller

29‧‧‧Protection Sheet Supply Department

29a‧‧‧Protection sheet

30a‧‧‧The first conveying belt

30b‧‧‧Second Transfer Belt

30c‧‧‧Third transfer belt

31‧‧‧Drive

31a‧‧‧Driver

32‧‧‧Supply roller

D‧‧‧ diameter of rod-shaped member

D1, D2, D3 ‧‧‧ separation distance

DL‧‧‧Laser distance of laser irradiation device

G‧‧‧glass film

Ga, Gb‧‧‧ width end

Gc‧‧‧Non-products

Gd‧‧‧Products Department

Ge‧‧‧ Glass Wrinkles

Gf‧‧‧ear

Gg‧‧‧ Filiform Strip

IV-IV‧‧‧line

L‧‧‧ laser light

Length of LP‧‧‧ glass film in the conveying direction

LR‧‧‧ Length of rod-shaped member

O‧‧‧ Irradiation position of laser light

R‧‧‧ glass roll

Ra‧‧‧ glass roll substrate

TP‧‧‧Thickness of plate member

TS‧‧‧Thickness of conveying sheet

V-V‧‧‧line

W‧‧‧ glass film width direction

WC‧‧‧ The width of the part of the glass film that does not include the ear in the widthwise center side

WG‧‧‧Width of glass film

WP‧‧‧Width of plate member

WS‧‧‧Width of conveying sheet

FIG. 1 is a side view showing a glass film manufacturing apparatus according to a first embodiment. FIG. 2 is a plan view of a glass film manufacturing apparatus. FIG. 3 is an enlarged side view of a main part of a manufacturing apparatus of a glass film. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2. Fig. 5 is a sectional view taken along the line V-V in Fig. 2. 6A is a cross-sectional view of a glass film for explaining a cutting step. 6B is a cross-sectional view of a glass film for explaining a cutting step. 6C is a cross-sectional view of a glass film for explaining a cutting step. Fig. 7 is a side view showing a glass film manufacturing apparatus according to a second embodiment. FIG. 8 is a plan view of a glass film manufacturing apparatus. FIG. 9 is an enlarged side view of a main part of a manufacturing apparatus of a glass film. Fig. 10 is a sectional view taken along the line X-X in Fig. 8. 11 is a side view showing a glass film manufacturing apparatus according to a third embodiment. FIG. 12 is a plan view of a glass film manufacturing apparatus. FIG. 13 is a side view showing a glass film manufacturing apparatus according to a fourth embodiment. 14 is a plan view of a control device for a glass film.

Claims (8)

A method for manufacturing a glass film, comprising: a conveying step of conveying a long glass film from upstream to downstream along its length direction; and a cutting step of conveying the glass film by the conveying step, One side of the self-laser irradiation device irradiates the glass film with laser light, thereby separating the glass film; and the conveying step includes a wrinkle removing step, by disposing on the upstream side of the laser irradiation device A wrinkle removing unit to remove wrinkles of the glass film; the cutting step is after the wrinkles of the glass film are removed in the conveying step, and the laser light is irradiated to the glass film Then, the glass film is separated, and a filament-like peeling object is generated from the widthwise end portion of the glass film to be separated. The method of manufacturing a glass film according to item 1 of the scope of patent application, wherein the wrinkle removing portion includes a rod-shaped member that is located on a lower surface side of the glass film and along a width of the glass film Configuration. The method for manufacturing a glass film according to item 2 of the scope of patent application, wherein the wrinkle removing portion includes a plate-shaped member, the plate-shaped member is disposed between the rod-shaped member and the laser irradiation device, And it is arrange | positioned on the lower surface side of the said glass film. The method for manufacturing a glass film according to item 3 of the scope of patent application, wherein an upper surface of the plate-like member is located lower than an upper end portion of the rod-like member. The method for manufacturing a glass film according to item 3 or 4 of the scope of patent application, wherein the width of the plate-shaped member is set to be smaller than the length of the rod-shaped member. The method for manufacturing a glass film according to any one of claims 3 to 5, wherein the laser irradiation device is disposed above the glass film, and is spaced in a width direction of the glass film. Two plates are arranged at a predetermined separation distance, and the width of the plate-shaped member is set to be larger than the separation distance of the laser irradiation device. The method of manufacturing a glass film according to item 6 of the scope of patent application, wherein the width of the plate-like member is 1.02 times or more the distance between the laser irradiation devices and 0.95 of the length of the rod-like member. Times below. The method for manufacturing a glass film according to any one of claims 1 to 7 in the scope of patent application, wherein in the conveying step, the conveying sheet is brought into contact with the lower surface of the glass film in the conveying step. The glass film is transported while being moved on a platform, and the wrinkle removing section is provided on an upstream side from the laser light irradiation position by the laser irradiation device, and is provided for use in the transportation. A sheet separated from the upper surface of the platform toward the upper surface; on the upstream side of the irradiation position of the laser light, the conveying sheet is in contact with the upper surface of the platform status.