Method for manufacturing a glass film

Abstract

Provided is a method for manufacturing a glass film that can prevent a decrease in workability and accurately cut a mother glass film along a cutting intended line without damaging the upper surface of the glass film. A method for manufacturing a glass film (G) in which an initial crack (D) is formed in a portion of a cutting intended line (L1) of a mother glass film (MG) in a state in which a bending stress is applied to the cutting intended line (L1), and the initial crack (D) is caused to progress along the cutting intended line (L1) to cut the mother glass film (MG), wherein the mother glass film is placed on a platform (2) that generates a negative pressure attractive force on the upper surface (2a) side in a manner in which a protruding portion (B) that is a portion in which an end portion (A) of the mother glass film (MG) protrudes is formed, and the cutting intended line (L1) is provided in the protruding portion (B).

Description

Technical Field

[0001] This invention relates to a method for manufacturing glass films. Background Technology

[0002] In recent years, flat panel displays, such as LCDs, plasma displays, OLEDs, and field emission displays, have been replacing the previously prevalent CRT displays as video display devices such as television receivers. In the glass panels used in these flat panel displays, there is a growing trend towards thinner glass.

[0003] Patent Document 1 discloses a glass film (thin glass) with a thickness of several hundred μm or less. As described in Patent Document 1, the manufacturing method of the glass film includes the following method: under a state in which tensile stress (bending stress) is applied to a predetermined cutting line of the glass film (mother glass film), an initial crack is formed in a portion of the predetermined cutting line, thereby causing the initial crack to propagate along the predetermined cutting line and cutting the glass film.

[0004] For example, Patent Document 1 describes a glass film that is cut by a glass film cutting device equipped with a transport roller for transporting the glass film. The glass film cutting device is configured such that the end of the glass film hangs down under its own weight when the glass film is cut. This applies tensile stress to the predetermined cutting line, so if an initial crack forms in a portion of the predetermined cutting line, the initial crack propagates along the predetermined cutting line, thus cutting the glass film. This glass film cutting device does not include a holding member to maintain the posture of the glass film, but Patent Document 1 discloses other glass film cutting devices equipped with a pressing member that presses the glass film from above.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2011-121791 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] The aforementioned glass film cutting device with conveying rollers lacks a holding member, making it impossible to maintain the orientation of the mother glass film before and after cutting. This may result in the mother glass film not being cut accurately along the predetermined cutting line. Furthermore, if the aforementioned pressing member is used for holding, the mother glass film needs to be positioned by pressing it from above, potentially reducing operability. Additionally, pressing the mother glass film from above may damage its upper surface. Therefore, a method for manufacturing a glass film that can prevent reduced operability and accurately cut the mother glass film along the predetermined cutting line without damaging its upper surface is required.

[0010] The objective of this invention is to provide a method for manufacturing a glass film that can precisely cut a mother glass film along a predetermined cutting line without reducing operability or causing damage to the upper surface of the glass film.

[0011] Solution for solving the problem

[0012] The problem to be solved by the present invention is as described above, and the solution for solving the problem will be described below.

[0013] That is, in the glass film manufacturing method of the present invention, under the condition of applying bending stress to the predetermined cutting line of the mother glass film, an initial crack is formed in a portion of the predetermined cutting line, thereby causing the initial crack to advance along the predetermined cutting line and cut the mother glass film. The glass film manufacturing method is characterized in that the mother glass film is placed on a platform on the upper surface side where a negative pressure attraction is generated, in such a way as forming an extension portion as the end of the mother glass film, and the predetermined cutting line is provided in the extension portion.

[0014] According to this method of manufacturing the glass film of the present invention, instead of pressing the mother glass film from above using a pressing member or the like, the mother glass film is adsorbed onto a platform, thereby maintaining the posture of the mother glass film before and after cutting. Therefore, the mother glass film can be precisely cut along the predetermined cutting line without reducing operability or damaging the upper surface of the glass film.

[0015] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable that the initial crack is formed at the end of the predetermined cutting line.

[0016] According to the manufacturing method of the glass film of this invention, an initial crack can be formed from the side of the mother glass film. Therefore, it is possible to prevent the mother glass film from being crushed from above and producing fragments when the initial crack is formed.

[0017] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable to bend the mother glass film by the bending stress and to cause the initial crack to advance by pressing the concave side of the bent mother glass film.

[0018] According to the manufacturing method of the glass film of this invention, by arranging the curved mother glass film such that the concave side becomes the lower surface of the glass film, the upper surface of the mother glass film is not pressed. Therefore, it is possible to prevent the mother glass film from being crushed from above and generating fragments, and it is possible to prevent damage to the upper surface of the glass film.

[0019] Furthermore, in the glass film manufacturing method of the present invention, it is preferable that the crack forming member forms the initial crack in a portion of the predetermined cutting line, and the crack forming member is guided by the guide portion to the position where the initial crack is formed.

[0020] According to the glass film manufacturing method of this invention, it becomes easy to form an initial crack in a portion of the predetermined cutting line. Therefore, the mother glass film can be cut with good precision along the predetermined cutting line.

[0021] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable to provide a retaining member on the concave side of the protrusion that is bent by the bending stress.

[0022] According to the manufacturing method of the glass film of this invention, the protrusion is bent in a manner similar to the retaining member. Therefore, the mother glass film can be cut with good precision along the retaining member.

[0023] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable that a slit is formed at the end of the retaining member.

[0024] According to the manufacturing method of the glass film of this invention, it is easy to form an initial crack on a portion of a predetermined cutting line by inserting a crack-forming member into a slit. Therefore, the mother glass film can be cut with good precision along the predetermined cutting line.

[0025] Furthermore, in the manufacturing method of the glass film of the present invention, it is preferable that a positioning member is provided on the platform, and the position of the mother glass film on the platform is determined by the mother glass film abutting against the positioning member.

[0026] According to the manufacturing method of the glass film of this invention, it becomes easy to cut the mother glass film at a predetermined position. Therefore, it is easy to cut the mother glass film to a predetermined size.

[0027] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable that the retaining member displays a cutting guide line that serves as a mark for the predetermined cutting line.

[0028] According to the manufacturing method of the glass film of this invention, it becomes easy to cut the mother glass film along the predetermined cutting line. Therefore, it is possible to cut the mother glass film with good precision along the predetermined cutting line.

[0029] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable that the mother glass film can be cut by causing the initial crack to advance along the predetermined cutting line while the platform is sandwiched in the middle on both sides.

[0030] According to the glass film manufacturing method of this invention, the dimension between the predetermined cutting lines on both sides of the platform sandwiched in the middle is a predetermined dimension. Therefore, the mother glass film can be cut to the predetermined dimension.

[0031] Furthermore, in the method for manufacturing the glass film of the present invention, it is preferable to lay a replaceable protective sheet on the platform and place the mother glass film on the protective sheet.

[0032] According to the manufacturing method of the glass film of this invention, by laying a replaceable protective sheet on the platform, even if glass powder is raised after cutting on the platform, the glass powder will adhere to the protective sheet, and the glass powder can be easily removed from the platform by replacing the protective sheet.

[0033] Invention Effects

[0034] As a result of the present invention, the following effects are achieved.

[0035] That is, according to the manufacturing method of the glass film of the present invention, the mother glass film can be precisely cut along the predetermined cutting line without reducing operability and without causing damage to the upper surface of the glass film. Attached Figure Description

[0036] Figure 1 It is a three-dimensional view of the platform on which the mother glass film is placed.

[0037] Figure 2 This is a perspective view of a glass film cutting apparatus used to illustrate the glass film manufacturing method according to the first embodiment of the present invention.

[0038] Figure 3 This is a schematic diagram illustrating the placement of the glass film on the platform. Figure 3 (a) is a schematic top view. Figure 3 (b) is a schematic side view. Figure 3 (c) is a schematic front view.

[0039] Figure 4 This is a diagram illustrating the downward pressing of the protruding part. Figure 4 (a) is a schematic top view. Figure 4 (b) is a schematic side view. Figure 4 (c) is a schematic front view.

[0040] Figure 5 This is a schematic diagram used to illustrate the formation of an initial crack. Figure 5 (a) is a schematic top view. Figure 5 (b) is a schematic side view. Figure 5 (c) is a schematic front view.

[0041] Figure 6 This is a schematic top view used to illustrate the progression of the initial crack.

[0042] Figure 7 This is a perspective view of a glass film cutting apparatus used to illustrate the glass film manufacturing method according to the second embodiment of the present invention.

[0043] Figure 8 This is a schematic diagram used to illustrate the formation of an initial crack. Figure 8 (a) is a schematic top view. Figure 8 (b) is a schematic side view. Figure 8 (c) is a schematic front view. Detailed Implementation

[0044] Hereinafter, the first embodiment of the present invention will be described with reference to the accompanying drawings.

[0045] In the manufacturing method of the glass film G, the mother glass film MG is cut using a glass film cutting device 1. The thickness of the mother glass film MG (glass film G) is preferably 10 μm to 200 μm.

[0046] use Figure 1 , Figure 2 as well as Figure 5 The structure of the glass film cutting device 1 will be described below. The glass film cutting device 1 mainly includes a platform 2, a crack forming member 3, a guiding member 4, a holding member 5, and a positioning member 6. It should be noted that in this embodiment, the cut mother glass film MG is rectangular in shape.

[0047] like Figure 1 as well as Figure 2 As shown, platform 2 is used to hold the mother glass film MG. For example, the upper surface 2a of platform 2 is rectangular, and multiple suction holes 2b are provided on the upper surface 2a. The suction holes 2b are connected to a negative pressure device (not shown), and the interior of the suction holes 2b is maintained at a negative pressure by the negative pressure device. Therefore, the mother glass film MG placed on the upper surface 2a of platform 2 is held on platform 2 by the negative pressure attraction generated by the suction holes 2b. If the upper surface 2a of platform 2 is formed of a porous material, the suction holes 2b may not be provided. It should be noted that the mother glass film MG is placed on platform 2 in such a way that an extension B, which is the portion of end A of the mother glass film MG extending from platform 2, is formed.

[0048] like Figure 5As shown, the crack-forming member 3 forms an initial crack D on a portion of the predetermined cutting line L1 of the mother glass film MG. The crack-forming member 3 forms the initial crack D, for example, at the end E of the predetermined cutting line L1. The crack-forming member 3 is, for example, a rod-shaped file. The crack-forming member 3 is preferably tapered at its tip. Therefore, by moving the crack-forming member 3 from below to above, the end E of the predetermined cutting line L1 can be cut without contacting the upper surface 2a side of the mother glass film MG. It should be noted that the direction of movement of the crack-forming member 3 is not limited as long as the direction in which the initial crack D can be formed.

[0049] The guide member 4 guides the crack forming member 3 toward the position where the initial crack D is formed. The guide member 4 is disposed at one end 5a of the retaining member 5. The guide member 4 is, for example, plate-shaped and is disposed such that the side of the guide crack forming member 3 is vertical. The guide member 4 is configured such that the end E of the predetermined cutting line L1 is located above the side of the guide crack forming member 3. Therefore, the crack forming member 3 slides on the side of the guide member 4, thereby enabling the initial crack D to be formed at the end E of the predetermined cutting line L1.

[0050] The retaining member 5 guides the protruding portion B of the mother glass film MG downwards. For example... Figure 2 As shown, the retaining member 5 is positioned below the protrusion B of the mother glass film MG and is arranged parallel to the side of the platform 2. The retaining member 5 is positioned lower than the upper surface 2a of the platform 2 and is configured to make it difficult to peel off the mother glass film MG that has been attracted by the suction hole 2b of the platform 2. The retaining member 5 is, for example, a member with a cross-sectional fan-shaped shape extending in one direction, and is arranged such that its curved outer peripheral surface follows the convexly curved protrusion B of the mother glass film MG. It should be noted that the retaining member 5 is not limited to this embodiment; for example, it may be a retaining member composed of a member with a cross-sectional arc shape extending in one direction. Alternatively, the retaining member 5 may be a hollow cylindrical body (tube) or a solid cylinder. Alternatively, the retaining member 5 may be composed of multiple rollers with a diameter smaller than that of a cylinder. In this case, the multiple rollers are arranged in the bending direction such that their outer peripheral surfaces follow the convexly curved protrusion B of the mother glass film MG. Furthermore, the rollers can rotate freely about axes parallel to the side of platform 2, which reduces friction with the protruding portion B of the mother glass film MG. The retaining member 5 is preferably made of resin material; if it is made of metal, it is preferable to have a foamed resin sheet covering its outer periphery. Along the axial direction of the retaining member 5, a cutting guide line L2 is displayed, marking the predetermined cutting line L1. The cutting guide line L2 is displayed at the center of the retaining member 5, but it can also be displayed within the range of both ends of the retaining member 5, and its length is not limited. It should be noted that the retaining member 5 is not essential, as... Figure 1As described, bending stress can also be applied to the predetermined cutting line L1 without using the retaining member 5 by using its own weight or by pressing down on the protrusion B of the mother glass film MG.

[0051] The aforementioned guiding member 4 and retaining member 5 are respectively provided on opposite sides of the platform 2. That is, on opposite sides of the platform 2, the guiding member 4 can guide the crack forming member 3 to form an initial crack D at the end E of the predetermined cutting line L1, and the retaining member 5 can guide the protruding portion B of the mother glass film MG downward. That is, through the reaction of gravity, the protruding portion B of the mother glass film MG is pressed upward by the retaining member 5.

[0052] The positioning member 6 is used to determine the position of the mother glass film MG placed on the platform 2. The positioning member 6 is configured to determine the position of the mother glass film MG by abutting against its end C, which is adjacent to the neutral end A of the mother glass film MG. The positioning member 6 is provided on the upper part of the side surface of the platform 2, which is orthogonal to the axial direction of the holding member 5. The positioning member 6 is configured to determine the position of the mother glass film MG by the end C of the mother glass film MG extending from the end 5a of the holding member 5. The extension width of the end C of the mother glass film MG extending from the end 5a of the holding member 5 is preferably 1 mm to 10 mm. The positioning member 6 is, for example, plate-shaped, and is provided such that the side surface abutting the mother glass film MG is vertical.

[0053] Next, the cutting method of the glass film G using the glass film cutting device 1 configured as described above will be explained.

[0054] like Figure 3 As shown, firstly, the operator places the mother glass film MG on the platform 2 with the protrusion B formed. At this time, the operator positions the mother glass film MG by bringing its end C against the positioning member 6. Furthermore, the mother glass film MG is held on the platform 2 by multiple suction holes 2b. It should be noted that the mother glass film MG is positioned by the positioning member 6 in such a state that the mother glass film MG protrudes from the end 5a of the holding member 5 to the extent that the crack-forming member 3 can abut from the side.

[0055] According to this method of manufacturing the glass film G of the present invention, instead of pressing from above using a pressing member or the like, the mother glass film MG is held in its position before and after cutting by adsorption on the platform 2. Therefore, the mother glass film MG can be precisely cut along the predetermined cutting line L1 without reducing operability or damaging the upper surface of the glass film G.

[0056] Furthermore, it becomes easy to cut the mother glass film MG at a predetermined position. Therefore, it becomes easy to cut the mother glass film MG to a predetermined size. For example, it becomes easy to cut the mother glass film MG in a direction orthogonal to the extending direction relative to the end C of the mother glass film MG.

[0057] like Figure 4 As shown, next, the operator presses the protrusion B downwards so that the cutting guide line L1 aligns with the cutting guide line L2 (refer to arrow F). Then, as the protrusion B moves downwards, the retaining member 5 presses the concave side of the mother glass film MG upwards along the portion showing the cutting guide line L2. As a result, the mother glass film MG bends convexly in a manner similar to that of the retaining member 5.

[0058] According to this method of manufacturing the glass film G of the present invention, the retaining member 5 is not used to press the upper surface of the mother glass film MG. Therefore, damage to the upper surface of the glass film G can be prevented.

[0059] Furthermore, the protruding portion B is bent in a manner similar to that of the retaining member 5. Therefore, the mother glass film MG can be cut with good precision along the portion where the cutting guide line L2 is displayed.

[0060] Furthermore, it becomes easier to cut the mother glass film MG along the predetermined cutting line L1. Therefore, it is possible to cut the mother glass film MG with good precision along the predetermined cutting line L1.

[0061] like Figure 5 As shown, next, with the mother glass film MG bent convexly in a manner similar to that of the retaining member 5, i.e., with bending stress applied to the predetermined cutting line L1, the operator forms an initial crack D at the end E of the predetermined cutting line L1, which is guided by the guiding member 4. Specifically, the operator moves the crack forming member 3 from below to above, and cuts the end E of the predetermined cutting line L1 (refer to arrow H).

[0062] like Figure 6 As shown, when the initial crack D is formed, the tearing force caused by the stress concentration of the bending stress acting on the predetermined cutting line L1 acts on the tip of the initial crack D, and the initial crack D continues to advance along the predetermined cutting line L1. Thus, the mother glass film MG is cut along the predetermined cutting line L1.

[0063] According to the manufacturing method of the glass film G of this invention, an initial crack D is formed from the side of the mother glass film MG. Therefore, it is possible to prevent the mother glass film MG from being crushed from above and producing fragments when the initial crack D is formed.

[0064] Furthermore, it becomes easier to form an initial crack D at the end E of the predetermined cutting line L1. Therefore, the mother glass film MG can be cut with good precision along the predetermined cutting line L1.

[0065] As described above, the retaining member 5 and the guiding member 4 are respectively provided on opposite sides of the platform 2. Therefore, the operator can cut the mother glass film MG along the predetermined cutting line L1 with the platform 2 sandwiched in the middle on both sides.

[0066] According to the manufacturing method of the glass film G of the present invention, the dimension between the predetermined cutting lines L1 on both sides of the platform 2 sandwiched in the middle is a predetermined dimension. Therefore, the mother glass film MG can be cut to a predetermined dimension.

[0067] It should be noted that the above embodiments illustrate a method performed by an operator, but the method of the present invention is not limited to being performed by an operator. For example, it may also be performed by a mechanical device such as a robot, rather than by an operator.

[0068] Next, use Figure 7 as well as Figure 8 The manufacturing method of the glass film G according to the second embodiment will be described. Hereinafter, the same names and reference numerals used in the description of the manufacturing method of the glass film G in the first embodiment will be used to refer to the same components. Here, the description will focus on the parts that differ from the manufacturing method of the glass film G in the first embodiment.

[0069] like Figure 7 as well as Figure 8 As shown, a slit 5b is formed at the end 5a of the retaining member 5. The slit 5b is formed, for example, as a groove extending vertically through the retaining member 5, parallel to its axial direction, and has dimensions allowing the crack forming member 3 to be inserted vertically. The mother glass film MG is configured such that the end E of the predetermined cutting line L1 is positioned above the slit 5b. Therefore, the crack forming member 3 can form an initial crack D at the end E of the predetermined cutting line L1 while inserted into the slit 5b. It should be noted that in this embodiment, since the slit 5b is formed, the cutting guide line L2 provided on the retaining member 5 can be omitted.

[0070] Next, the method for cutting the glass film G using the glass film cutting device 1 configured as described above will be explained.

[0071] like Figure 8As shown, when the operator bends the mother glass film MG in a convex shape, mimicking the holding member 5, i.e., applies bending stress to the predetermined cutting line L1 of the mother glass film MG, an initial crack D forms at the end E of the predetermined cutting line L1, which is guided by the slit 5b. Specifically, when the crack forming member 3 is inserted into the slit 5b, the operator moves the crack forming member 3 from below to above, cutting the end E of the predetermined cutting line L1 (refer to arrow J). At this time, it is preferable to guide the crack forming member 3 using the inner surface 5c of the slit 5b as a guide.

[0072] According to the manufacturing method of the glass film G of the present invention, the mother glass film MG is cut by inserting the crack forming member 3 into the slit 5b, thereby making it easy to form an initial crack D at the end E of the predetermined cutting line L1. Therefore, the mother glass film MG can be cut with good precision along the predetermined cutting line L1.

[0073] It should be noted that after the two ends of the mother glass film MG are cut off using the glass film cutting device 1 of the second embodiment, the ends of the mother glass film MG formed by the cutting are brought into contact with the positioning member 6, and the two ends of the mother glass film MG are cut off using the glass film cutting device 1 of the first embodiment. Thus, the mother glass film MG can be cut into a rectangular shape of a predetermined size by cutting it from four sides.

[0074] In the above embodiment, the mother glass film MG is directly placed on the upper surface 2a of the platform 2. However, a protective sheet (not shown) can also be laid on the upper surface 2a of the platform 2, and the mother glass film MG can be placed on the protective sheet. After the mother glass film MG is cut, sometimes tiny glass powder is thrown up, and sometimes this tiny glass powder adheres to the upper surface 2a of the platform 2. When the next mother glass film MG is placed on the upper surface 2a of the platform 2 while the glass powder is adhered to it, and the mother glass film MG is attracted, the mother glass film MG is pressed by the glass powder, which may cause damage to the surface of the mother glass film MG. Even in this case, the glass powder can be easily removed by replacing the protective sheet.

[0075] As a protective sheet laid on the upper surface 2a of platform 2, suitable materials include backing paper, resin films such as polyethylene terephthalate film, and foamed resin sheets such as foamed polyethylene sheets. In particular, foamed resin sheets are preferred as protective sheets for their cushioning properties. When using protective sheets that are not breathable, such as resin films or foamed resin sheets, it is preferable to form holes in the protective sheet so that the mother glass film MG can be attracted by platform 2. As for the holes formed in the protective sheet, it is preferable to form holes with a diameter of 1 mm to 5 mm at intervals of 10 mm to 50 mm. The protective sheet may also extend from the upper surface 2a of platform 2, but in order to maintain good cutability of the mother glass film MG, it is preferable not to lay the protective sheet on the holding member 5.

[0076] The above-described embodiments are merely representative examples, and various modifications can be made without departing from the essential points of an embodiment. Of course, it can also be implemented in various ways. The scope of this invention is indicated by the description of the patented technical solution, and also includes all equivalents and modifications within the scope of the patented technical solution.

[0077] Explanation of reference numerals in the attached figures

[0078] 1. Glass film cutting device

[0079] 2 platforms

[0080] upper surface of platform 2a

[0081] 3 Crack Formation Components

[0082] 4 guiding components

[0083] 5 retaining components

[0084] 5a Retaining the end of the component

[0085] 5b slit

[0086] 6 positioning components

[0087] The end of the mother glass film A

[0088] B protrusion

[0089] The end of the C-type glass film

[0090] D Initial Crack

[0091] G glass film

[0092] L1 Cut the predetermined line

[0093] L2 Cut the guide wire

[0094] MG mother glass film.

Claims

1. A method for manufacturing a glass film, wherein, under a state in which bending stress is applied to a predetermined cutting line of a mother glass film, an initial crack is formed on a portion of the predetermined cutting line, thereby causing the initial crack to propagate along the predetermined cutting line and cut the mother glass film. The manufacturing method of the glass film is characterized in that, On a platform that generates negative pressure attraction on the upper surface, the mother glass film is placed in such a way that it forms an extension that extends from the end of the mother glass film, and the predetermined cutting line is provided on the extension. The protrusion is bent in a manner mimicking a retaining member positioned below the protrusion and lower than the upper surface of the platform, thereby imparting bending stress to the predetermined cutting line. When the initial crack is formed, the tearing force caused by the stress concentration of the bending stress acting on the predetermined cutting line acts on the tip of the initial crack, and the initial crack continues to advance along the predetermined cutting line.

2. The method for manufacturing a glass film according to claim 1, characterized in that, The initial crack forms at the end of the predetermined cutting line.

3. The method for manufacturing a glass film according to claim 2, characterized in that, The mother glass film is bent by the bending stress. The initial crack is caused to propagate by pressing on the concave side of the bent mother glass film.

4. The method for manufacturing a glass film according to claim 3, characterized in that, The crack-forming component forms the initial crack at a portion of the predetermined cutting line. The crack-forming member is guided by the guide portion to the location where the initial crack is formed.

5. The method for manufacturing a glass film according to claim 1, characterized in that, The retaining member has a curved outer peripheral surface. The retaining member is configured such that the outer peripheral surface is arranged along the protrusion of the convexly curved mother glass film.

6. The method for manufacturing a glass film according to claim 3, characterized in that, A slit is formed at the end of the retaining member.

7. The method for manufacturing a glass film according to any one of claims 1 to 6, characterized in that, The platform is equipped with positioning components. The position of the mother glass film on the platform is determined by the mother glass film abutting against the positioning member.

8. The method for manufacturing a glass film according to any one of claims 1 to 6, characterized in that, The retaining member displays a cutting guide line that serves as a marker for the predetermined cutting line.

9. The method for manufacturing a glass film according to any one of claims 1 to 6, characterized in that, The mother glass film can be cut by causing the initial crack to advance along the predetermined cutting line by sandwiching the platform between the two sides.

10. The method for manufacturing a glass film according to any one of claims 1 to 6, characterized in that, A replaceable protective sheet is laid on the platform. The mother glass film is placed on the protective sheet.

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