TW202124300A - Method for manufacturing strip-shaped glass film - Google Patents

Abstract

In the discarding of a partial area, which is located along the length direction of a strip-shaped glass film 1, as a discarded glass portion 1x from the strip-shaped glass film 1, a separating step and a discarding step are carried out, wherein the separating step comprises separating the discarded glass portion 1x from the strip-shaped glass film 1 by pressing a bending stress applying member against the strip-shaped glass film 1 to apply bending stress to the strip-shaped glass film 1, and the discarding step comprises detaching the separated discarded glass portion 1x in the downward direction from a lateral conveyance path R2 to discard the discarded glass portion 1x.

Description

Method for manufacturing ribbon glass film

The invention relates to a method for manufacturing a band-shaped glass film.

Mobile terminals such as smartphones or tablet personal computers (PCs) are required to be thin and lightweight. Therefore, the current demand for thinner glass substrates incorporated in these terminals is increasing. Under the current situation as described above, a glass substrate that is thinned (for example, with a thickness of 300 μm or less) to a film shape, that is, a glass film, has been developed and manufactured.

However, the manufacturing step of the glass film usually includes the step of manufacturing the ribbon-shaped glass film as the basis thereof. In addition, Patent Document 1 discloses an example of a method of manufacturing a band-shaped glass film using a down-draw method typified by an overflow down-draw method, a re-draw method, and a slit down-draw method.

The method disclosed in the document includes: a forming step, using a forming device, to draw the ribbon-shaped glass film downward in the longitudinal direction while simultaneously forming; , The formed ribbon glass film is transported along a curved curved transport path, and its transport direction is changed from the vertical downward to the horizontal direction; the horizontal transport step is to move the ribbon glass film with the converted transport direction along the horizontal direction The conveying path is conveyed in the horizontal direction; the cutting and removing step uses a laser cutting device to remove the ineffective portions (including thick-walled ears) that exist at both ends of the width direction from the band-shaped glass film being conveyed in the horizontal direction. The part of the part) is cut and removed; and the winding step is to wind the band-shaped glass film from which the ineffective part is cut and removed around the winding core to form a glass roll.

Here, in the production of the ribbon-shaped glass film using the above method, there is a need for the ribbon-shaped glass film formed in the forming step to divide a part of the section along the longitudinal direction as a waste glass portion. Abandoned situation. For example: (A) The case where the core used to make the next glass roll is replaced with a new core due to the completion of the glass roll with the required length of the strip-shaped glass film; or (B) It is used for adjusting the laser cutting device that cuts the non-effective part from the band-shaped glass film, etc.

In detail, in the case of (A), the winding of the ribbon-shaped glass film cannot be restarted until the replacement of the core is completed, so a part of the section formed during the replacement of the core is used as the waste glass portion And discarded. On the other hand, in the case of (B) described above, before the adjustment of the laser cutting device is completed, the band-shaped glass film from which the ineffective portion is removed cannot be obtained. That is, since a strip-shaped glass film in a state to be wound into a glass roll was not obtained, a part of the section formed during the adjustment of the laser cutting device was discarded as a discarded glass portion.

In addition, in order not to produce waste glass parts, it is also considered to take the following countermeasures: temporarily stopping the forming of the band-shaped glass film during the replacement of the core or the adjustment of the laser cutting device. However, when such countermeasures are taken, it is very difficult to restore the molding conditions of the band-shaped glass film when the molding is restarted. Therefore, the following countermeasures were taken: during the replacement of the core or the adjustment of the laser cutting device, the molding of the band-shaped glass film was continued, and a part of the section was discarded as a discarded glass portion.

As an example of the form of discarding the waste glass part, the following form can be cited: the belt-shaped glass film being transported vertically downwards after forming is repeatedly cut in the width direction, thereby removing the waste glass part from the belt-shaped glass film. The discarded glass films are cut into multiple pieces, and each discarded glass film is dropped vertically downward and discarded. In this form, before the start of the discarding of the discarded glass portion, the roller conveyor is temporarily retracted from vertically below the forming device, and the execution of the conveying direction switching step is temporarily stopped. Moreover, when the replacement of the core or the adjustment of the laser cutting device is completed, the discarding of the discarded glass portion is completed, and the roller conveyor is returned to the vertical lower side of the forming device, so that the ribbon glass following the discarded glass portion The film passes on the roller conveyor (on the curved conveying path), and the ribbon-shaped glass film is introduced to the lateral conveying path, thereby restarting the conveying direction switching step. Prior art literature Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 2015-44709

[The problem to be solved by the invention] However, when the waste glass part is discarded in the above-mentioned form, the problem which should be solved as follows arises.

That is, in the above-mentioned form, as the waste glass portion is discarded, the roller conveyor must be retracted and returned from vertically below the forming device, and the belt-shaped glass film must be passed on the roller conveyor to be introduced. There is a problem that the work described above is extremely cumbersome to the lateral conveyance path. In addition, there is also a problem that the introduction work itself is difficult, and the band-shaped glass film during work is likely to be broken. In addition, when cracks occur, the cracks develop along the longitudinal direction of the band-shaped glass film to the portion being formed, and may be caught in a situation where the molding of the band-shaped glass film has to be interrupted.

In addition, these problems are not only caused when the waste glass part is discarded in the above-mentioned form in the manufacture of the band-shaped glass film using the said method. In addition, in the case of manufacturing a band-shaped glass film in a form in which the conveying direction is converted from the vertical direction downward to the horizontal direction after forming by the down-draw method, when the waste glass portion is discarded in the above form, the same is true The above problems will arise.

In addition to this, in addition to the factors (A) and (B) described above, (C) the behavior of the glass film in the forming step is disordered, or (D) is installed in a curved conveying path or a lateral conveying path In the event of a sudden failure such as a failure of the machine, it is necessary to take measures to recover from the failure at the point in time when the occurrence of the failure is determined. It is necessary to discard the band-shaped glass film formed during the period when the above-mentioned restoration measures are taken as the discarded glass portion, and it is necessary to switch to the discarding operation of the discarded glass portion in this case in advance. However, in the above-mentioned existing discarding In the method, the response is insufficient.

The technical problem of the present invention formed in view of the above situation is to improve workability and reliability when discarding a part of the band-shaped glass film along the longitudinal direction as a discarded glass portion, and to be able to complete the delivery in advance. Describe the switching of discarded jobs. [Means to solve the problem]

The present invention invented in order to solve the above-mentioned problems is a method of manufacturing a ribbon-shaped glass film, which includes: a forming step of drawing the ribbon-shaped glass film downward in the vertical direction while simultaneously forming; The ribbon-shaped glass film is transported along a curved curved transport path, and the transport direction of the ribbon-shaped glass film is converted from the vertical direction downward to the horizontal direction; The strip-shaped glass film that changes the conveying direction is conveyed in the horizontal direction along the lateral conveying path, and the method of manufacturing the strip-shaped glass film is characterized in that: When a part of the section is discarded as a discarded glass portion, perform: a breaking step of applying a bending stress to the ribbon glass film by pressing a bending stress imparting member against the ribbon glass film, thereby removing the discarded glass portion The self-belt glass film is divided; and the discarding step is to detach the divided waste glass portion from the lateral conveying path downward and discard it.

In this method, in the breaking step, since the bending stress imparting member is pressed against the band-shaped glass film, a large bending stress can be applied to the band-shaped glass film to reliably break the band-shaped glass film. At this time, since only the action of pressing the bending stress imparting member against the band-shaped glass film is required, it is possible to perform the breaking operation using a mechanical element that can be operated remotely. Therefore, it is possible to immediately start the breaking step and the discarding step by switching operations or the like, and it is possible to quickly switch to the discarding step.

In this method, it is preferable to use a rotatable roller to form the bending stress imparting member.

In the contact between the bending stress imparting member and the ribbon glass film, since the ribbon glass film is moving, sliding resistance acts between the bending stress imparting member and the ribbon glass film. If a rotatable roller is used to form the bending stress imparting member, the sliding resistance can be absorbed by the driven rotation of the roller. Therefore, it is possible to prevent the inconvenience such as that the band-shaped glass film is irregularly flexed due to sliding resistance and caught on the bending stress imparting member.

In this method, it is preferable that the bending stress imparting member is pressed against the ineffective portion of the band-shaped glass film.

If the bending stress imparting member is pressed against the effective portion of the band-shaped glass film, the break of the effective portion will not propagate to the non-effective portion having a thicker wall than the effective portion at the breaking portion, and there is a concern that the breaking failure may be caused. By pressing the bending stress imparting member against the ineffective portion of the band-shaped glass film, the above-mentioned inconvenience can be prevented.

In this method, it is preferable to mount the two bending stress imparting members on a common shaft.

Thereby, the two bending stress imparting members can be moved in conjunction with each other, and an equal bending stress can be applied to the ineffective portions at both ends of the band-shaped glass film.

In this method, it is preferable to perform a scratch forming step of forming a scratch assisting cutting of the band-shaped glass film in the waste glass portion on the upstream side of the bending stress imparting member.

As described above, by forming a scratch in the band-shaped glass film in the scratch forming step in advance, when the bending stress is applied by the bending stress applying member, the scratch becomes the starting point of the cutting, so that the cutting operation can be stably performed.

In this method, it is preferable that the surface of the band-shaped glass film that is the contact side with the bending stress imparting member is formed, and the scratch is formed by the scratch forming step. Therefore, when the bending stress is applied by the bending stress applying member, the bending stress in the direction of opening the scratch acts on the upstream side of the bending stress applying member. Therefore, the scratch can be used as the starting point for cutting. The band-shaped glass film is surely broken.

In this method, it is preferable to provide a cut-and-remove step for cutting and removing ineffective portions at both ends of the widthwise direction of the band-shaped glass film in the lateral conveying step, and in the lateral conveying step, it is better to The cutting and removing step performs the cutting step and the discarding step on the upstream side.

If the cutting step and the discarding step are performed downstream of the cutting and removing step, it is difficult to adjust the cutting and removing device in the cutting and removing step. If the cutting step and the discarding step are performed on the upstream side of the cutting and removing step, the disadvantage can be avoided.

In this method, it is preferable to provide a breaking device in the lateral conveying step, including: an opening disposed below the lateral conveying path, an opening and closing member that opens and closes the opening, and the bending stress imparting member .

Thereby, by opening and closing the opening with the opening and closing member, it is possible to switch between the execution of the discarding step and the execution of the lateral conveying step. Therefore, the work at the time of discarding the discarded glass part can be made simpler.

In this method, it is preferable that in a state where the opening is closed by the opening and closing member, the center portion of the band-shaped glass film in the width direction is transported from the lateral direction by blowing gas from the opening and closing member The path floats to transport the ribbon glass film.

This prevents the effective part of the band-shaped glass film from contacting the opening and closing member and forming scratches during the lateral conveyance step, and prevents the quality of the glass film manufactured based on the effective part of the band-shaped glass film. Decline. [Effects of the invention]

According to the present invention, it is possible to improve workability and reliability when discarding a part of the band-shaped glass film along the longitudinal direction as a discarded glass portion, and to complete the switch to the discarding work in advance.

Hereinafter, the method of manufacturing the glass film according to the embodiment of the present invention will be described with reference to the accompanying drawings. In addition, this embodiment is preferably applied to the case where the thickness of the formed band-shaped glass film is less than 50 μm.

As shown in FIG. 1, the manufacturing method of the glass film of this embodiment includes a forming step, using a down-drawing method, such as an overflow down-drawing method, to draw the ribbon-shaped glass film 1 downward in the vertical direction while simultaneously forming it; and a conveying direction switching step, The formed ribbon glass film 1 is transported along the curved curved transport path R1, and the transport direction is changed from the vertical direction downward to the horizontal direction; in the horizontal transport step, the transport direction of the ribbon glass film is changed 1 Conveying in the horizontal direction along the horizontal conveying path R2; cutting and removing step, cutting off the non-effective portion 1a from the belt-shaped glass film 1 being conveyed in the horizontal direction (refer to Figs. 2 and 3); and In the winding step, the band-shaped glass film 1 from which the ineffective portion 1a is removed and only the effective portion 1b is wound around the core 2 into a roll shape to form the glass roll 3.

[A. Forming steps] When performing the forming step, a wedge-shaped formed body 4 and a pair of rollers 6 are mainly used. The pair of rollers 6 is configured to be able to clamp the glass ribbon 5 flowing down from the formed body 4 from both sides of the front and back. Multistage.

The forming body 4 includes: an overflow groove 4a formed at the top for the molten glass 7 to flow in; a pair of side parts 4b, 4b for the molten glass 7 overflowing from the overflow groove 4a on both sides to flow down respectively; And the lower end 4c fuses and integrates the molten glass 7 flowing down along the side surface parts 4b and 4b. This molded body 4 can continuously produce a glass ribbon 5 from the molten glass 7 fused and integrated at the lower end 4c.

In the roller pair 6 arranged in multiple stages up and down, it includes a cooling roller pair 6a, an annealing device roller pair 6b, and a support roller pair 6c in order from the upper stage side. These roller pairs 6 are respectively on one side and the other side in the width direction of the glass ribbon 5, and can pinch the site|part which becomes the ineffective part 1a of the band-shaped glass film 1 later.

The cooling roller pair 6a is a roller pair for suppressing shrinkage in the width direction of the glass ribbon 5 by sandwiching the glass ribbon 5 directly below the molded body 4. The annealing device roller pair 6b is a roller pair for guiding the glass ribbon 5 that is slowly cooled to a temperature below the strain point in the slow cooling furnace 8 downward. In addition, the annealing device roller pair 6b may pinch the glass ribbon 5, and may not pinch and restrict only the shaking of the glass ribbon 5 in the thickness direction. The supporting roller pair 6c is used to support the glass ribbon 5 cooled to around room temperature in a cooling chamber (not shown) arranged below the slow cooling furnace 8, and to decide to pull the glass ribbon 5 downward Roller pair of the speed of extension (pulling speed).

The glass ribbon 5 passing on the roller pairs 6 arranged in multiple stages up and down is formed into a ribbon-shaped glass film 1. Here, the band-shaped glass film 1 is formed to a thickness that can impart flexibility. In addition, the band-shaped glass film 1 includes: an effective portion 1b, which exists in the center in the width direction (the direction perpendicular to the paper surface in FIG. 1), and later becomes a product; and a pair of ineffective portions 1a, which exist relative to the effective portion 1b The outside in the width direction becomes the target of removal. Furthermore, in the part located in the width direction end part of the band-shaped glass film 1 in the non-effective part 1a, the ear part 1aa thicker than other parts is formed.

In addition, in the present embodiment, the band-shaped glass film 1 is formed by the overflow down-draw method. Of course, the band-shaped glass film 1 may be formed by other down-draw methods such as a slit down-draw method or a redraw method.

[B. Transferring direction conversion steps] In the execution of the conveying direction switching step, a roller conveyor 9 including a plurality of rollers 9a arranged in parallel is used. The roller conveyor 9 supports the belt-shaped glass film 1 from the back 1c side while conveying it along the curved conveying path R1, and switches the conveying so that the surface 1d of the belt-shaped glass film 1 after passing through the curved conveying path R1 faces upward. direction.

[C. Horizontal transport steps] When performing the lateral conveying step, use: a belt conveyor 10 arranged in order from the upstream side along the lateral conveying path R2; a plate-like body 11, a plate-like body 12, and a plate-like body as a conveying body divided into three parts 13; belt conveyor 14; and belt conveyor 15.

The belt conveyor 10 can spray gas G (for example, air) on the back surface 1c of the belt-shaped glass film 1, and the belt-shaped glass film 1 floats on the belt conveyor 10 only in the center in the width direction (mainly the effective portion 1b) In the state of delivery. This belt conveyor 10 includes: an endless belt 10a, a non-floating portion (mainly the ineffective portion 1a) for conveying the belt-shaped glass film 1; and a gas ejector (not shown), which is arranged on the belt 10a The gas G is injected upward on the inner peripheral side of the. A plurality of fine through holes (not shown) are formed in the belt 10 a, and the gas G injected from the gas injector passes through the through holes and reaches the back surface 1 c of the belt-shaped glass film 1. In addition, the gas injectors arranged on the inner peripheral side of the belt 10a are arranged along the center of the belt 10a in the width direction.

As shown in FIGS. 2 and 3, the three-part plate-shaped body 11, the plate-shaped body 12, and the plate-shaped body 13 each include a conveying surface portion 16 facing the back surface 1 c of the band-shaped glass film 1. A plurality of injection ports 16 a are formed in the conveying surface part 16 for injecting gas G (for example, air) to the effective portion 1 b of the band-shaped glass film 1 passing on the conveying surface part 16. In addition, a plurality of balls 16b as supporting members are provided on the conveying surface portion 16 to support the ineffective portion 1a of the band-shaped glass film 1 from below. Thereby, during the execution of the lateral transport step, the effective portion 1b is floated from the transport surface 16 by the pressure of the gas G, and the non-effective portion 1a is supported by the balls 16b. 1 The plate-shaped bodies 11, 12, and 13 are transported by passing them in sequence.

The conveyance surface part 16 is formed in a rectangle wider than the full width of the band-shaped glass film 1. The plurality of injection ports 16a are connected to the spaces 17 formed inside the respective plate-shaped bodies 11, 12, and 13, respectively. In addition, each injection port 16a can inject the gas G supplied to the space 17 from a fluid compression device (for example, an air compressor). The plurality of balls 16b are arranged in a state of being arranged in two rows along the longitudinal direction of the band-shaped glass film 1. Each ball 16b includes a spherical load ball 16ba that directly supports the ineffective portion 1a; a hole portion 16bb into which the load ball 16ba is inserted; and a support ball 16bc that supports the load ball 16ba in a rotatable manner in the hole portion 16bb.

As shown in FIG. 4, of the plate-shaped body 11, the plate-shaped body 12, and the plate-shaped body 13, which are divided into three bodies, the plate-shaped body 12 has a function as an opening and closing member, and is formed on the plate-shaped body 11 and the plate-shaped body 13. The openings 18 between each other are opened and closed. The opening 18 is below the horizontal conveying path R2, and the opening is wider than the full width of the band-shaped glass film. The plate-shaped body 12 is connected to a member (the plate-shaped body 11) located on the upstream side of the horizontal conveying path R2 with respect to the plate-shaped body 12 via a connecting member 19 such as a hinge. The connecting member 19 includes: a first plate 19a fixed to the plate-shaped body 11; a second plate 19b fixed to the plate-shaped body 12;部19c. The shaft portion 19c extends along the width direction of the band-shaped glass film 1.

Thereby, the plate-shaped body 12 can be rotated at the initial position (the position indicated by the solid line in FIG. 4) and the revolving position (the double-dot chain line in FIG. 4) by turning around the shaft portion 19c of the connecting member 19 The positions shown) move between each other, and the opening 18 is opened and closed along with the movement. In the manufacturing method of the glass film of this embodiment, by opening and closing the opening part 18 by using the plate-shaped body 12, the execution of the horizontal conveyance process can be switched, and the execution of the cutting process and the discarding process mentioned later can be switched.

When the plate-shaped body 12 is at the initial position and the opening 18 is closed, as described above, the effective portion 1b is floated by the gas G, and the ineffective portion 1a is supported by the balls 16b. The glass film 1 passes on the plate-shaped body 12 to perform a lateral conveyance step. On the other hand, when it is necessary to perform the breaking step and the discarding step due to the various factors as described above, the plate-shaped body 12 is located at the revolving position and the opening 18 is opened. In addition, while the plate-shaped body 12 is in the orbiting position, the ejection of the gas G by the plate-shaped body 12 is cancelled.

[Summary of C-1 Breaking Steps and Abandoning Steps] Hereinafter, the outline of the breaking step and the discarding step will be described based on FIGS. 5A to 5D. In addition, the details of the two steps will be described later.

In the opening portion 18 in the open state, the waste glass portion 1x shown in FIG. 5A is separated from the last portion G1a of the preceding band-shaped glass film 1 (G1) as shown in FIG. Start the breaking step with this. Then, as shown in FIG. 5C, the discarded glass portion 1x is continuously divided into a plurality of discarded glass films 1xx, and as the discarding step is started, each discarded glass film 1xx is moved downward from the lateral conveyance path R2 in order by its own weight It detaches, and is discarded from the opening 18 through a chute not shown. Finally, as shown in FIG. 5D, the last part 1xb of the waste glass part 1x is separated from the front part G2a of the subsequent band-shaped glass film 1 (G2). Thereby, the full length of the waste glass portion 1x is divided from the band-shaped glass film 1 to complete the dividing step. In addition, the discarding step is completed by discarding the discarded glass film 1xx including the last portion 1xb of the discarded glass portion 1x. After the breaking step and the discarding step are completed, the plate-shaped body 12 returns to the initial position to close the opening 18, and transfers to the normal lateral transport step.

[C-2 Cutting and Removal Step] As shown in Fig. 1, in the cutting and removing step, on the horizontal conveying path R2, and at a position downstream of the position where the cutting step and the discarding step are performed, the laser cutting method is used to cut the glass film 1 from the ribbon. Cut off the non-effective part 1a. When performing the cut-and-remove step, the laser irradiator 21 and the refrigerant ejector 22 that are fixedly installed above the belt conveyor 14 are used. The laser irradiator 21 continuously irradiates the laser 21a along the boundary between the effective portion 1b and the ineffective portion 1a of the band-shaped glass film 1 passing underneath itself. The refrigerant ejector 22 continuously ejects the refrigerant 22 a (for example, mist-like water) to the portion irradiated by the laser 21 a in the band-shaped glass film 1.

Thereby, due to the temperature difference between the part heated by the laser 21a and the part cooled by the refrigerant 22a, thermal stress is generated in the band-shaped glass film 1, and the thermal stress is used to connect the non-existent parts along the effective part 1b. The boundary of the effective portion 1a continuously forms a cut portion (a portion where the effective portion 1b is separated from the non-effective portion 1a). In this way, the band-shaped glass film 1 is continuously cut along the longitudinal direction. In addition, in the present embodiment, although the band-shaped glass film 1 is cut by the laser cutting method, the band-shaped glass film 1 may be cut by the laser fusion method.

The band-shaped glass film 1 (the band-shaped glass film 1 including only the effective portion 1 b) from which the ineffective portion 1 a is cut and removed is transferred from the belt conveyor 14 to the belt conveyor 15. On the other hand, the ineffective portion 1a removed from the belt-shaped glass film 1 is not transferred to the belt conveyor 15, and is discarded after being detached from the conveying path of the belt-shaped glass film 1 downward.

[D. Winding step] When performing the winding step, the core 2 and the sheet roll 23 are mainly used. In the winding step, the belt-shaped glass film 1 conveyed from the belt conveyor 15 is overlapped with the protective sheet 23a continuously drawn from the sheet roll 23, and then wound into a roll shape around the core 2 to form glass Volume 3. With the above, all the steps of the manufacturing method of the glass film of this embodiment are completed.

[E. Details of breaking steps and discarding steps] Next, referring to FIGS. 6 to 11, the details of the breaking step and the discarding step will be described.

As a preparation for performing the cutting step and the discarding step, the scratch forming step is performed, that is, the surface 1d of the band-shaped glass film 1 (the surface that becomes the contact side with the bending stress imparting member 41 described later) is formed to assist cutting Broken scratch 20 (refer to Figure 6). The scratch formation step is performed on the conveyance path of the band-shaped glass film 1 at a position on the upstream side of the plate-shaped body 12. In addition, the position where the scratch 20 is formed may be on the horizontal conveying path R2 or on the curved conveying path R1. In this embodiment, as shown in FIG. 1, a case where a scratch forming device 30 for forming a scratch 20 is provided above the plate-shaped body 11 adjacent to the upstream side of the plate-shaped body 12 is exemplified. The scratch 20 may be, for example, a scribe line formed along the width direction of the band-shaped glass film 1 using a wheel cutter or the like, or may be formed along the width direction of the band-shaped glass film 1 using a grinding stone or the like. Scratches.

As shown in FIG. 6, the ineffective part 1a of the both ends of the width direction of the band-shaped glass film 1 is provided with a plurality of scratches 20 on each side with an interval in the longitudinal direction of the band-shaped glass film 1. As shown in FIG. In the ineffective portions 1 a on both sides in the width direction, the scratches 20 are positioned on the same straight line extending in the width direction of the band-shaped glass film 1. In addition, in addition to forming the scratches 20 on the two ineffective portions 1a located at both ends in the width direction as described above, it is also possible to form the scratches 20 on only any one of the ineffective portions 1a.

Next, the breaking device 40 for performing the breaking step will be described based on FIG. 7. As shown in FIG. 7, the bending stress imparting member 41 located above the plate-shaped body 12 is arrange|positioned in an initial state. The bending stress imparting member 41 can use, for example, two rollers that are rotatably attached to a shaft 42 extending in the width direction of the band-shaped glass film 1. The shaft 42 is attached to the front end of the arm 43, and the arm 43 is rotatably supported by a frame (not shown) with the shaft core O as a center. The arms 43 are separated in the width direction of the band-shaped glass film 1 to form a group, and one end and the other end of the shaft 42 are respectively attached to the group of arms 43. The rotation of the arm 43 is guided by a guide mechanism that includes an arc-shaped guide hole 45 centered on the shaft core O and a guide pin 46 fitted in the guide hole 45. The guide hole 45 is provided in either one of the frame and the arm 43, and the guide pin 46 is provided in the other. In this embodiment, the case where the guide hole 45 is provided in a frame, and the guide pin 46 is provided in an arm is illustrated.

The arm 43 is driven by an air cylinder (for example, an air cylinder) not shown, and the driving force of the air cylinder is used to oscillate and drive in the forward and reverse directions with the shaft O as the center. The swing range of the arm 43 is set at the position where the lower end of the roller 41 reaches the opening 18 and bends the band-shaped glass film 1 as the lower limit, and the lower end of the roller 41 reaches a position above the band-shaped glass film 1 being conveyed. (Initial state) as the upper limit. The two rollers 41 are positioned so as to be able to contact the ineffective portions 1 a at both ends in the width direction of the band-shaped glass film 1, and are attached to the shaft 42.

In addition to the roller 41 described above, the opening 18 and the plate-shaped body 12 that opens and closes the opening 18 constitute the breaking device 40. The driving sources of the breaking device 40 (the air cylinder that drives the arm 43, the rotational driving source of the plate 12, etc.) and the scratch forming device 30 are electrically connected to a control device not shown, and are based on control from the control device Signal to perform the actions described below.

Next, based on FIGS. 8 to 10, the details of the breaking procedure using the breaking device 40 will be described.

If due to the reasons (A) to (D) mentioned above (replacement of the glass roll, adjustment of the laser cutting device, disorder of the glass behavior in the forming step, failure of the conveying system, etc.) When it is necessary to discard a part of the band-shaped glass film 1 as a discarded glass portion 1x, the operator who has confirmed the occurrence of this issue operates the switch. By this switch operation, the scratch forming device 30 is activated, and a plurality of scratches 20 are sequentially formed in the ineffective portion 1 a of each row of the belt-shaped glass film 1 as the belt-shaped glass film 1 is transported.

As shown in FIG. 8, just before any scratch 20 (for example, the scratch 20a located on the most downstream side on the lateral conveying path R2) provided on the band-shaped glass film 1 reaches the opening 18, according to a signal from the control device, The plate-shaped body 12 is moved from the initial position to the swing position, and the opening 18 is opened. In addition, according to the signal from the control device, the cylinder of the breaking device 40 is activated to rotate the arm 43 counterclockwise in FIG. 7 and, as shown in FIG. 9A, the roller 41 is moved from the upper limit position to the lower limit position. When the roller 41 reaches the lower limit position, the scratch 20a is separated from the upstream conveying body (plate-shaped body 11) and reaches the upstream end of the opening 18 to adjust the starting timing of the cylinder or the roller 41 rotation speed (revolution speed).

By pressing the roller 41 against the band-shaped glass film 1, the band-shaped glass film 1 is bent so that the band-shaped glass film 1 protrudes downward in the opening 18. In addition, by bending the band-shaped glass film 1 so as to bulge downward in the opening 18, the upstream and downstream band-shaped glass films 1 sandwiched by the vertices bent by the roller 41 are placed in the opening. The inside of the portion 18, on the contrary, is curved in an upwardly convex manner. Since the scratch 20a is present in the upwardly convex and curved area, as shown in FIG. 9B, the bending stress in the direction in which the scratch 20a opens due to the pressing of the roller 41 acts, and the band-shaped glass film 1 is scratched accordingly. The trace 20a is a starting point and is cut (disconnected) in the width direction. Then, as the band-shaped glass film 1 is cut, the front part 1xa of the waste glass portion 1x is separated from the last part G1a of the preceding band-shaped glass film 1 (G1). In the above description, the band-shaped glass film 1 is divided from the first scratch 20a as a starting point. However, the band-shaped glass film 1 may be divided by any subsequent scratch 20 as a starting point.

After the band-shaped glass film 1 is divided from the scratch 20 (20a) as a starting point, the arm 43 rotates in the clockwise direction to return the roller 41 to the upper limit position. When the band-shaped glass film 1 is divided from the scratch 20 (20a) as a starting point, the waste glass portion 1x subsequent to the divided portion is bent and hangs down due to its own weight. Therefore, every time the plurality of scratches 20 following the first scratch 20a respectively reach the open opening 18, the waste glass portion 1x is repeatedly cut in the width direction due to its own weight with each scratch 20 as a starting point. Subsequently, as shown in FIG. 10, the waste glass part 1x is divided into a plurality of waste glass films 1xx, and each waste glass film 1xx is dropped from the lateral conveyance path R2 and passed through the opening 18 to be discarded. And the discarding of this discarded glass film 1xx continues until discarding the discarded glass film 1xx including the last part 1xb of the discarded glass part 1x. Through the above, the breaking step and the discarding step are completed.

After the roller 41 comes into contact with the band-shaped glass film 1 and after the band-shaped glass film 1 is broken, the band-shaped glass film 1 moves until the last part G1a of the preceding band-shaped glass film G1 is detached from the roller 41. The sliding resistance acts between the roller 41 and the band-shaped glass film 1. This sliding resistance is absorbed by the follower rotation (rotation) of the roller 41 attached to the shaft 42 in a rotatable manner. Therefore, the band-shaped glass film 1 in contact with the roller 41 is irregularly deflected due to the sliding resistance, and it is possible to prevent problems such as catching on the roller 41 and the like.

After the breaking step and the discarding step are completed, as shown in FIG. 11, at the time point when the front head G2a of the band-shaped glass film 1 (G2) after the last portion 1xb of the discarded glass portion 1x reaches the plate-shaped body 12, In order to move the plate-shaped body 12 from the turning position to the initial position, the opening 18 is started to be closed. Moreover, if the plate-shaped body 12 returns to the initial position, the opening 18 is closed by the plate-shaped body 12 accordingly. As shown in FIG. 12, the band-shaped glass film 1 (G2) following the waste glass portion 1x is executed A horizontal conveying step of conveying along the horizontal conveying path R2. In the execution of the lateral conveyance step with the opening 18 closed, the scratch forming device 30 is not activated, and the scratch 20 is not formed in the band-shaped glass film 1.

In the above-mentioned manufacturing method, the cutting step of cutting the waste glass portion 1x from the band-shaped glass film 1 is performed on the lateral conveyance path R2. Thus, the cutting step is performed, and at the point in time when the waste glass portion 1x is broken from the ribbon glass film 1, the front head of the ribbon glass film 1 following the waste glass portion 1x is already located on the lateral conveyance path R2. That is, the subsequent band-shaped glass film 1 (G2) is in a state where it has been introduced into the lateral conveyance path R2. Furthermore, in this method, the discarding process is performed on the horizontal conveyance path R2 in the same manner as the splitting process, and the discarded glass portion 1x split from the band-shaped glass film 1 is discarded. Therefore, according to this method, as the discarded glass portion 1x is discarded, it is not necessary to introduce the band-shaped glass film 1 (G2) subsequent to the discarded glass portion 1x to the lateral conveyance path R2. As a result, it is possible to simplify the work associated with discarding the discarded glass portion 1x. In addition, due to the high difficulty of the work, there is no need to introduce the band-shaped glass film 1 into the lateral conveying path R2 where cracks are likely to occur during the operation, and the occurrence of cracks in the band-shaped glass film 1 can also be prevented. In addition, according to this method, the following additional effects can be obtained. That is, since the waste glass portion 1x is detached downward from the lateral conveyance path R2, for example, as in the case of detachment upward, the waste glass portion 1x temporarily detached from the lateral conveyance path R2 falls due to its own weight and can be reliably removed. Such concerns remain on the horizontal conveying path R2.

In addition, since the waste glass part 1x is dropped from the lateral conveyance path R2, the moving speed of the waste glass part 1x increases as it falls, and the waste glass part 1x moves at a higher speed than the subsequent band-shaped glass film 1 (G2). Therefore, the space|interval between the last part 1xb of the waste glass part 1x, and the front head part G2a of the following band-shaped glass film 1 (G2) can be enlarged, and the state that the two parts approached can be eliminated. As a result, it is possible to reliably divide the passage of both the waste glass portion 1x and the subsequent band-shaped glass film 1 (G2).

Particularly in this manufacturing method, since the roller 41 as a bending stress imparting member is pressed against the ribbon-shaped glass film 1 and bends in the breaking step, it is possible to apply a large bending stress to the ribbon-shaped glass film 1 The band-shaped glass film 1 is surely divided. On the other hand, when the bending stress imparting member 41 is omitted, the band-shaped glass film 1 reaching the opening 18 is deflected downward only by its own weight. Therefore, even if the scratch 20 that becomes the starting point of the cutting is formed in the band in advance The shape of the glass film 1 does not necessarily cause the initial breaking of the waste glass part 1x, and the reliability of the breaking and disposal of the waste glass part 1x is lowered.

In addition, only by pressing the roller 41 against the band-shaped glass film 1, the first breaking of the band-shaped glass film 1 can be performed. Therefore, it is possible to perform the breaking operation using a mechanical element that can be operated remotely. . Therefore, even in a situation where a large number of people cannot be deployed in the production line, when a sudden phenomenon such as a disorder of the band-shaped glass film 1 in the forming step or a failure in the conveying system occurs, the phenomenon can be recognized by The operator’s switch operation immediately switches to the execution mode of the breaking step and the abandoning step. Therefore, it is possible to prevent the equipment or the band-shaped glass film from being damaged unexpectedly due to the delay in the start of the breaking step and the discarding step.

Here, the manufacturing method of the glass film of this invention is not limited to the form demonstrated in each said embodiment. For example, in the above description, the roller conveyor 9 is used when performing the conveying direction switching step, but it is not limited to this. It is also possible to perform the transfer direction switching step by directly transporting the belt-shaped glass film being transported vertically downwards to the belt conveyor 10 (transverse transport path R2) without using the roller conveyor 9. In this case, the band-shaped glass film on the curved conveying path R1 is in a state of being curved following the curved conveying path R1 without being supported by any foreign objects.

In addition, in the above embodiment, the opening step is started by the operator's switch operation, but it can also be configured to use various sensors arranged in the production line to monitor the necessity of switching to the opening step and the discarding step. When the phenomenon occurs in the execution mode of the sensor, when the occurrence of this phenomenon is detected by the sensor, the breaking step and the discarding step are automatically started.

1.G1, G2: ribbon glass film G1a, 1xb: last part G2a, 1xa: front head 1a: Invalid part 1aa: ear 1b: Effective part 1c: back 1d: surface 1x: Waste glass department 1xx: Waste glass film 2: roll core 3: glass roll 4: formed body 4a: Overflow trough 4b: side 4c: lower end 5: Glass ribbon 6: Roller pair 6a: Cooling roller pair 6b: Annealing device roller pair 6c: Support roller pairs 7: Molten glass 8: Slow cooling furnace 9: Roller conveyor 9a: Roller 10a: with 11, 12, 13: Plate-shaped body (opening and closing member) 10, 14, 15: belt conveyor 16: Transport the face 16a: Jet port 16b: Ball 16ba: load ball 16bb: Hole 16bc: support ball 17: Space 18: Opening 19: Connecting components 19a: first board 19b: second board 19c: Shaft 20: scratches 20a: scratches 21: Laser irradiator 21a: Laser 22: Refrigerant ejector 22a: refrigerant 23: sheet roll 23a: Protective film 30: Scratch forming device 40: Breaking device 41: Roller (bending stress imparting member) 42: axis 43: arm 45: pilot hole 46: guide pin G: gas O: Shaft R1: Curved transport path R2: Horizontal transport path

Fig. 1 is a longitudinal sectional side view showing the outline of a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 2 is a plan view showing a lateral conveyance step in a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 3 is a longitudinal front view showing the A-A cross section in Fig. 2. Fig. 4 is a side view showing a lateral conveyance step in a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 5A is a diagram conceptually showing a cutting step and a discarding step in the method of manufacturing a glass film according to an embodiment of the present invention. FIG. 5B is a diagram conceptually showing the breaking step and the discarding step in the method of manufacturing the glass film according to the embodiment of the present invention. FIG. 5C is a diagram conceptually showing the breaking step and the discarding step in the method of manufacturing the glass film according to the embodiment of the present invention. FIG. 5D is a diagram conceptually showing the breaking step and the discarding step in the method of manufacturing the glass film according to the embodiment of the present invention. Fig. 6 is a plan view showing a scratch formation step in a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 7 is a side view showing a cutting device in a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 8 is a side view showing a cutting step and a discarding step in the glass film manufacturing method according to the embodiment of the present invention. Fig. 9A is a side view showing a cutting step and a discarding step in the glass film manufacturing method according to the embodiment of the present invention. Fig. 9B is a side view showing an enlarged area A in Fig. 9A. Fig. 10 is a side view showing a cutting step and a discarding step in a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 11 is a side view showing a method of manufacturing a glass film according to an embodiment of the present invention. Fig. 12 is a side view showing a lateral conveyance step in the glass film manufacturing method of the first embodiment of the present invention.

1: Ribbon glass film

1a: Invalid part

1b: Effective part

1c: back

1d: surface

1x: Waste glass department

2: roll core

3: glass roll

4: formed body

4a: Overflow trough

4b: side

4c: lower end

5: Glass ribbon

6: Roller pair

6a: Cooling roller pair

6b: Annealing device roller pair

6c: Support roller pairs

7: Molten glass

8: Slow cooling furnace

9: Roller conveyor

9a: Roller

10a: with

11, 12, 13: plate-shaped body (opening and closing member)

10, 14, 15: belt conveyor

21: Laser irradiator

21a: Laser

22: Refrigerant ejector

22a: refrigerant

23: sheet roll

23a: Protective film

30: Scratch forming device

40: Breaking device

41: Roller (bending stress imparting member)

G: gas

R1: Curved transport path

R2: Horizontal transport path

Claims (9)

A method for manufacturing a ribbon glass film includes: In the forming step, the ribbon-shaped glass film is drawn downward in the longitudinal direction while simultaneously forming; the conveying direction conversion step is to transport the formed ribbon-shaped glass film along a curved, curved conveying path, and the ribbon-shaped glass film The conveying direction of the glass film is changed from the vertical direction downward to the horizontal direction; and the horizontal conveying step is to convey the strip-shaped glass film whose conveying direction is changed by the curved conveying path along the horizontal conveying path in the horizontal direction, The manufacturing method of the band-shaped glass film is characterized in that: When a part of the section along the longitudinal direction of the ribbon-shaped glass film is discarded as a discarded glass portion, a breaking step is performed, and the bending stress imparting member is pressed against the ribbon-shaped glass film. The band-shaped glass film is subjected to bending stress, and the discarded glass portion is divided from the band-shaped glass film; and the discarding step is to detach the divided discarded glass portion from the lateral conveyance path downward and discard. The method of manufacturing a band-shaped glass film according to claim 1, wherein the bending stress imparting member is formed using a rotatable roller. The method for manufacturing a band-shaped glass film according to claim 1 or claim 2, wherein the bending stress imparting member is pressed against an ineffective portion of the band-shaped glass film. The method of manufacturing a band-shaped glass film according to claim 3, wherein the two bending stress imparting members are mounted on a common shaft. The method for manufacturing a band-shaped glass film according to any one of claims 1 to 4, wherein a scratch formation step is performed on the upstream side of the bending stress imparting member, that is, in the waste glass portion Scratches are formed to assist the cutting of the band-shaped glass film. The method of manufacturing a ribbon-shaped glass film according to claim 5, wherein in the ribbon-shaped glass film, the surface that is the contact side with the bending stress imparting member is formed by the scratch forming step Scratches. The method for manufacturing a band-shaped glass film according to any one of claims 1 to 6, wherein in the lateral conveying step, ineffective portions at both ends in the width direction of the band-shaped glass film are cut and removed In the cutting and removing step of, the cutting step and the discarding step are performed on the upstream side of the cutting and removing step in the lateral conveying step. The method for manufacturing a ribbon-shaped glass film according to any one of claims 1 to 7, wherein a breaking device is provided in the lateral conveying step, and the breaking device has: A lower opening, an opening and closing member that opens and closes the opening, and the bending stress applying member. The method for manufacturing a band-shaped glass film according to claim 8, wherein in a state where the opening is closed by the opening and closing member, the band-shaped glass film is caused to be blown by gas from the opening and closing member. The center part in the width direction of φ is floated from the horizontal conveying path to convey the band-shaped glass film.

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