Method for manufacturing glass sheet

Abstract

A method for manufacturing a glass plate comprises: a loading step of loading a glass plate (G) and a protective sheet (S) on a tray (T) in a first packaging chamber (3); and a carrying-out step of carrying the tray (T) loaded with the glass plate (G) and the protective sheet (S) from the first packaging chamber (3) to a second packaging chamber (4), so that the air pressure in the first packaging chamber (3) is higher than the air pressure in the second packaging chamber (4).

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a glass sheet. Background Art

[0002] As is well known, glass plates are used in various fields including substrates for displays such as liquid crystal displays and organic EL displays.

[0003] In the manufacturing process of such a glass plate, first, a ribbon-shaped glass ribbon is continuously formed by a known method such as an overflow down-draw method or a float method. Next, the glass ribbon is cut in the width direction according to a predetermined length, and a glass plate is cut out from the glass ribbon. Thereafter, the cut glass plate is conveyed on a conveying path by a conveying device. On the conveying path, for example, a process of removing the ear portion of the glass plate, a process of inspecting the glass plate for defects, etc., are carried out as required. Then, after going through such various processes, the glass plate and the protective sheet are loaded on a pallet by a loading device at the downstream end of the conveying path of the conveying device. Then, on the pallet loaded with the glass plate and the protective sheet, for example, a positional deviation limiting member of the glass plate is installed, thereby producing a glass plate package. The produced glass plate package is stored or conveyed (shipped) (for example, refer to patent documents 1 and 2).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2010-30744

[0007] Patent Document 2: Japanese Patent Application Publication No. 2019-89674 Summary of the invention

[0008] Problems to be solved by the invention

[0009] In addition, the packing room for loading the glass plate and the protective sheet on the pallet requires a clean space to prevent foreign matter (particles) from adhering to the glass plate. However, if the air pressure in the packing room is not properly managed, there is a possibility that the outdoor gas (air) and foreign matter contained in the gas will flow into the packing room and the foreign matter will adhere to the glass plate and / or the protective sheet. Furthermore, when the glass plate and the protective sheet with foreign matter attached are loaded on the pallet, the foreign matter will be brought to the contact surface between the glass plate and the protective sheet, which may cause problems such as the foreign matter being pressed against the glass plate or scratches.

[0010] An object of the present invention is to reliably suppress the introduction of foreign matter into the contact surface between the glass plate and the protection sheet when the glass plate and the protection sheet are loaded on a tray.

[0011] Solutions to Solve Problems

[0012] The present invention made to solve the above-mentioned problems is a method for manufacturing a glass plate, characterized in that the method for manufacturing a glass plate includes: a loading step of loading a glass plate and a protective sheet on a pallet in a first packaging chamber; and a carrying-out step of carrying out the pallet loaded with the glass plate and the protective sheet from the first packaging chamber to a second packaging chamber, so that the air pressure in the first packaging chamber is higher than the air pressure in the second packaging chamber.

[0013] In this way, the packing chamber is divided into the first packing chamber and the second packing chamber. Furthermore, the air pressure of the first packing chamber in which the glass plate and the protective sheet are loaded on the pallet is set higher than the air pressure of the second packing chamber. Therefore, it is possible to suppress the gas in the second packing chamber and foreign matter contained in the gas from flowing into the first packing chamber. In other words, it is possible to keep the first packing chamber cleaner than the second packing chamber. Therefore, when the glass plate and the protective sheet are loaded on the pallet in the first packing chamber, it is possible to reliably suppress the foreign matter from being brought into the contact surface between the glass plate and the protective sheet.

[0014] In the above-mentioned configuration, it is preferable that the air pressure in the second packaging chamber be higher than the atmospheric pressure.

[0015] In this way, it is possible to suppress the inflow of gas and foreign matter from the outside (e.g., outdoors) into the second packaging chamber. That is, since the inflow of foreign matter from the outside is suppressed, it is easy to ensure the cleanliness of the second packaging chamber. In addition, since the inflow of gas from the outside is suppressed, it is also easy to manage the air pressure of the second packaging chamber.

[0016] In the above configuration, the loading step may further include: supplying a strip sheet drawn from a protection sheet roll disposed in the protection sheet supply chamber from the protection sheet supply chamber to the first packaging chamber; and cutting the strip sheet supplied to the first packaging chamber into a predetermined length to obtain a protection sheet.

[0017] Thus, the protection sheet supply chamber in which the protection sheet roll is placed can be set as a chamber separate from the first packaging chamber. Therefore, even if the glass plate in the first packaging chamber is broken, the glass powder is unlikely to adhere to the protection sheet roll and the strip sheet in the protection sheet supply chamber.

[0018] In the above-mentioned configuration, it is preferable that the air pressure in the protection sheet supply chamber be higher than the atmospheric pressure.

[0019] In this way, it is possible to suppress the inflow of gas and foreign matter from the outside (e.g., outdoors) into the protective sheet supply chamber. That is, since the inflow of foreign matter from the outside is suppressed, it is also easy to ensure the cleanliness of the protective sheet supply chamber. In addition, since the inflow of gas from the outside is suppressed, it is also easy to manage the air pressure of the protective sheet supply chamber.

[0020] In the above-mentioned configuration, it is preferable that the air pressure of the protection sheet supply chamber is made substantially the same as the air pressure of the first packaging chamber.

[0021] This can prevent airflow (eg, rising airflow) from being generated due to air pressure difference between the first packaging chamber and the protective sheet supply chamber, thereby preventing the strip sheet from swinging due to airflow and causing poor supply or cutting of the strip sheet.

[0022] In the above-mentioned structure, it is preferable that the protection sheet supply chamber is located above the first packing chamber.

[0023] Particles (tiny foreign matter) such as glass powder floating in the air tend to move downward from top to bottom under the action of gravity. Therefore, if the protective sheet supply chamber is located above the first packaging chamber as described above, it is difficult for particles in the first packaging chamber to flow into the protective sheet supply chamber, and it is easy to maintain the protective sheet roll and strip sheet in the protective sheet supply chamber in a clean state.

[0024] In the above configuration, it is preferable that the gas in the first packing chamber and / or the gas in the protection sheet supply chamber be circulated by an air conditioner including a filter unit.

[0025] In this way, the gas in the first packaging chamber and / or the gas in the protection sheet supply chamber can be circulated, and the cleanliness thereof can be improved.

[0026] Effects of the Invention

[0027] According to the present invention, when a glass plate and a protection sheet are placed on a tray, it is possible to reliably suppress foreign matter from being brought into the contact surface between the glass plate and the protection sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic side view of the manufacturing apparatus of the glass plate which concerns on 1st Embodiment of this invention.

[0029] Figure 2 It is a schematic side view of the manufacturing apparatus of the glass plate which concerns on 2nd Embodiment of this invention.

[0030] Figure 3 It is a schematic side view of the manufacturing apparatus of the glass plate which concerns on 3rd Embodiment of this invention. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the same reference numerals are used for the corresponding constituent elements in each embodiment, so that repeated descriptions are sometimes omitted. In the case where only a part of the structure is described in each embodiment, the structure of other embodiments previously described can be applied to the other parts of the structure. In addition, not only the combination of structures explicitly stated in the description of each embodiment, but also the structures of multiple embodiments can be partially combined with each other even if not explicitly stated, as long as there is no particular hindrance to the combination.

[0032] (First Embodiment)

[0033] like Figure 1 As shown, the glass sheet manufacturing apparatus 1 according to the first embodiment is an apparatus for manufacturing a glass sheet G by an overflow down-draw method, and constitutes a part of a building.

[0034] The manufacturing apparatus 1 includes a cutting chamber 2, a first packaging chamber 3, a second packaging chamber 4, a protective sheet supply chamber 5, and a reserve chamber 6. Each chamber 2 to 6 is a chamber (eg, a clean chamber) that defines a space capable of blocking external pollutants to a certain extent.

[0035] In the present embodiment, the cutting chamber 2, the first packaging chamber 3, and the second packaging chamber 4 are arranged on the same floor of the building, and the protection sheet supply chamber 5 and the preparation chamber 6 are arranged on the same floor of the building. The floor where the protection sheet supply chamber 5 and the preparation chamber 6 are arranged is an upper floor of the floor where the cutting chamber 2, the first packaging chamber 3, and the second packaging chamber 4 are arranged, and the protection sheet supply chamber 5 is arranged directly above the first packaging chamber 3.

[0036] The cutting chamber 2 and the first packaging chamber 3 , the first packaging chamber 3 and the second packaging chamber 4 , and the protection sheet supply chamber 5 and the reserve chamber 6 are partitioned by openable and closable doors 7 , 8 , 9 as partition members.

[0037] In the cutting chamber 2, first, a ribbon-shaped glass ribbon produced by the overflow down-draw method is cut into a predetermined length by a first cutting device (not shown) to obtain a single glass sheet G. Next, in the cutting chamber 2, both ends of the glass sheet G in the width direction including the ear portion (thick wall portion) are cut by a second cutting device (not shown).

[0038] In the first packing chamber 3, a loading device (not shown) loads a vertical glass plate G and a vertical protection sheet S on a tray T. Thus, a glass plate laminate L including the glass plate G and the protection sheet S is placed on the tray T. It should be noted that an inspection chamber may be provided between the cutting chamber 2 and the first packing chamber 3, and the glass plate G may be inspected by an inspection device (not shown) in the inspection chamber before the glass plate G is loaded on the tray T. The inspection device measures, for example, uneven thickness (plate thickness), streaks (texture), types of defects (such as bubbles, foreign matter, etc.), positions (coordinates), and sizes of the glass plate G.

[0039] In the first packaging chamber 3, an air supply device 10a is provided on the ceiling, and an exhaust device 11a is provided on the floor. The air pressure of the first packaging chamber 3 is adjusted by adjusting the air supply amount of the air supply device 10a and the exhaust amount of the exhaust device 11a. The air pressure of the first packaging chamber 3 is measured by a pressure sensor 12a.

[0040] The tray T on which the glass plate laminated bodies L are placed in the first packaging chamber 3 is carried into the second packaging chamber 4. In the second packaging chamber 4, the final packaging step is performed to obtain a final glass plate package X from the tray T on which the glass plate laminated bodies L are placed. The final packaging step includes, for example, a step of attaching a position restriction member (not shown) for restricting positional deviation of the glass plates G to the tray T, a step of covering the glass plate laminated bodies L with a protective member C in order to prevent foreign matter from adhering to the glass plate laminated bodies L, and the like. The position restriction member includes, for example, a pressing plate disposed on the frontmost surface of the glass plate laminated bodies L and a belt for pressing the pressing plate toward the tray T. As the protective member C, for example, a protective bag covering the glass plate laminated bodies L, a protective film rolled on the glass plate laminated bodies L, and the like can be used. It should be noted that the glass plate package X and the empty tray T are stored in the second packaging chamber 4.

[0041] In the second packing chamber 4, an air supply device 10b is provided on the top, and an exhaust device 11b is provided on the floor. The air pressure of the second packing chamber 4 is adjusted by adjusting the air supply amount of the air supply device 10b and the exhaust amount of the exhaust device 11b. The air pressure of the second packing chamber 4 is measured by a pressure sensor 12b. It should be noted that the air supply device 10b and the exhaust device 11b of the second packing chamber 4 may also be omitted.

[0042] A protection sheet roll Sr is arranged in the protection sheet supply chamber 5. The protection sheet roll Sr is formed by winding a strip sheet Sw, which is a raw material of the protection sheet S, around a roll core R in a roll shape. As the strip sheet Sw (protection sheet S), for example, a foamed resin sheet, a backing paper, etc. are used. The strip sheet Sw pulled out from the protection sheet roll Sr is supplied from the protection sheet supply chamber 5 to the first packaging chamber 3 through a through hole 13 provided on the floor surface of the protection sheet supply chamber 5 so as to communicate the protection sheet supply chamber 5 with the first packaging chamber 3. In the first packaging chamber 3, the strip sheet Sw is cut into a predetermined length by a cutting device (not shown) to obtain a single protection sheet S. The protection sheet S thus obtained is loaded on the tray T by the loading device.

[0043] In the protection sheet supply chamber 5, an air supply device 10c is provided on the top and an exhaust device 11c is provided on the floor. The air pressure in the protection sheet supply chamber 5 is adjusted by adjusting the air supply amount of the air supply device 10c and the exhaust amount of the exhaust device 11c. The air pressure in the protection sheet supply chamber 5 is measured by a pressure sensor 12c.

[0044] The reserve chamber 6 is used, for example, when a new protection sheet roll Sr is carried into the protection sheet supply chamber 5. The reserve chamber 6 is provided with an elevator.

[0045] The air pressure of the preparatory chamber 6 is measured by the pressure sensor 12d. In the present embodiment, the preparatory chamber 6 is not provided with an air supply device and an exhaust device for adjusting the air pressure, but an air supply device and an exhaust device may be provided similarly to the first packing chamber 3 and the like.

[0046] It should be noted that the above-mentioned air supply devices 10a~10c preferably have a filter section on the gas flow path (not shown). In this way, clean gas can be supplied to the room. Similarly, it is preferred that the above-mentioned exhaust devices 11a~11c have a filter section on the gas flow path. In this way, clean gas can be discharged to the outside. As the filter section of the air supply devices 10a~10c, for example, a coarse dust filter, a medium performance filter (such as a MEPA filter, etc.), a high performance filter (such as a HEPA filter, a ULPA filter, etc.), etc. are used.

[0047] Next, the manufacturing method of the glass plate of this embodiment is demonstrated. This manufacturing method is a method of manufacturing the glass plate G using the manufacturing apparatus 1 mentioned above.

[0048] like Figure 1As shown, the manufacturing method includes: a loading step of loading the glass plates G and the protection sheet S on a tray T in the first packaging chamber 3; a carrying-out step of carrying out the tray T loaded with the glass plates G and the protection sheet S, that is, the tray T loaded with the glass plate laminate L, from the first packaging chamber 3 to the second packaging chamber 4; and a final packaging step of obtaining a final glass plate package X from the tray T loaded with the glass plate laminate L in the second packaging chamber 4.

[0049] The stacking step further includes: a supplying step of supplying the strip sheet Sw pulled out from the protection sheet roll Sr arranged in the protection sheet supply chamber 5 from the protection sheet supply chamber 5 to the first packaging chamber 3 through the through hole 13; and a cutting step of cutting the strip sheet Sw supplied to the first packaging chamber 3 into a predetermined length to obtain a protection sheet S.

[0050] And while each of these steps is being performed, that is, while the step of manufacturing the glass sheet G is being performed, the air pressures of the first packaging chamber 3 , the second packaging chamber 4 , and the protection sheet supply chamber 5 are managed as follows.

[0051] That is, the air pressure P1 of the first packaging chamber 3 is set higher than the air pressure P2 of the second packaging chamber 4 .

[0052] Specifically, the pressure difference (P1-P2) between the air pressure P1 of the first packing chamber 3 and the air pressure P2 of the second packing chamber 4 is preferably 3 to 10 Pa, more preferably 5 to 8 Pa. The pressure difference (P1-P2) is managed by, for example, the air supply devices 10a, 10b and the exhaust devices 11a, 11b.

[0053] In this way, the air pressure P1 of the first packaging chamber 3 in which the glass plate G and the protection sheet S are loaded on the tray T is set higher than the air pressure P2 of the second packaging chamber 4. Therefore, it is possible to suppress the gas in the second packaging chamber 4 and foreign matter contained in the gas from flowing into the first packaging chamber 3. That is, the first packaging chamber 3 can be kept cleaner than the second packaging chamber 4. Therefore, when the glass plate G and the protection sheet S are loaded on the tray T in the first packaging chamber 3, it is possible to reliably suppress the foreign matter from being brought into the contact surface between the glass plate G and the protection sheet S. It should be noted that, after the glass plate G and the protection sheet S are stacked on the tray T, the glass plate G and the protection sheet S are in contact with each other, so it is difficult for foreign matter to be brought into the contact surface between the glass plate G and the protection sheet S from the outside.

[0054] The air pressure P3 of the protection sheet supply chamber 5 is set higher than the air pressure P4 of the preparation chamber 6. In the present embodiment, the preparation chamber 6 is not provided with a device for managing air pressure, but is provided with an elevator or the like connected to the outside air, so the air pressure P4 of the preparation chamber 6 is the atmospheric pressure. Therefore, the air pressure P4 of the protection sheet supply chamber 5 is set higher than the atmospheric pressure.

[0055] Specifically, the pressure difference (P3-P4) between the air pressure P3 of the protection sheet supply chamber 5 and the air pressure P4 (atmospheric pressure) of the preparation chamber 6 is preferably 1 to 10 Pa, more preferably 2 to 7 Pa. The pressure difference (P3-P4) is managed by, for example, the air supply device 10c and the exhaust device 11c.

[0056] In this way, it is possible to suppress the inflow of outdoor gas and foreign matter into the protection sheet supply chamber 5 through the preliminary chamber 6. That is, since the inflow of foreign matter from the outside is suppressed, it is also easy to ensure the cleanliness of the protection sheet supply chamber 5. In addition, since the inflow of outdoor gas is suppressed, it is also easy to manage the air pressure of the protection sheet supply chamber 5.

[0057] The air pressure P3 of the protection sheet supply chamber 5 is set to be substantially the same as the air pressure P1 of the first packaging chamber 3 .

[0058] Specifically, the pressure difference (P3-P1) between the air pressure P3 of the protection sheet supply chamber 5 and the air pressure P1 of the first packing chamber 3 is, for example, preferably -1 to 1 Pa, more preferably -0.2 to 0.2 Pa, and most preferably 0 to 0.2 Pa. The pressure difference (P3-P1) is managed, for example, by the air supply devices 10a, 10c and the exhaust devices 11a, 11c.

[0059] In this way, it is possible to suppress the formation of an airflow (e.g., an updraft) caused by the air pressure difference near the through hole 13 between the first packaging chamber 3 and the protection sheet supply chamber 5. Therefore, it is possible to suppress the situation where the strip sheet Sw swings under the action of the airflow and the strip sheet Sw is poorly supplied or cut. It should be noted that the poor supply and poor cutting of the strip sheet Sw are more likely to occur when an updraft is generated near the through hole 13, so the differential pressure (P3-P1) between the air pressure P3 of the protection sheet supply chamber 5 and the air pressure P1 of the first packaging chamber 3 is preferably 0Pa or more.

[0060] The air pressure P2 of the second packaging chamber 4 is set higher than the atmospheric pressure.

[0061] Specifically, the pressure difference (P2-PA) between the air pressure P2 of the second packing chamber 4 and the atmospheric pressure PA is preferably 0.5 to 10 Pa, and more preferably 2 to 6 Pa. The pressure difference (P2-PA) is managed by, for example, the air supply device 10b and the exhaust device 11b.

[0062] In this way, it is possible to suppress the inflow of gas and foreign matter from the outside into the second packaging chamber 4. That is, since the inflow of foreign matter from the outside is suppressed, it is easy to ensure the cleanliness of the second packaging chamber 4. In addition, since the inflow of gas from the outside is suppressed, it is also easy to manage the air pressure of the second packaging chamber 4.

[0063] The gas pressure of each chamber 3 to 6 and / or the differential pressure of each chamber 3 to 6 are not particularly limited and can be changed as appropriate. The differential pressure is obtained based on the measurement results of the pressure sensors 12a to 12d, but can also be directly measured using a differential pressure gauge.

[0064] (Second Embodiment)

[0065] like Figure 2 As shown, the glass plate manufacturing apparatus 1 of the second embodiment is different from the first embodiment in that the gas in the first packing chamber 3 and the gas in the protection sheet supply chamber 5 are circulated by an air conditioner (air handling unit) 21 .

[0066] Specifically, in the present embodiment, a common air conditioner 21 is connected to the first packing chamber 3 and the protective sheet supply chamber 5. The air conditioner 21 is internally provided with: a blower (blower) 22 for sending gas (air) to the first packing chamber 3 and the protective sheet supply chamber 5 side; and a filter 23 for removing foreign matter in the gas sent by the blower 22. The filter 23 is not particularly limited, but in the present embodiment, a filter 23a for coarse dust, a medium performance filter (e.g., MEPA filter, etc.) 23b, and a high performance filter (e.g., HEPA filter, ULPA filter, etc.) 23c are provided in order from the side where the gas is taken in (the blower 22 side). It should be noted that the air conditioner 21 may also be internally provided with a temperature and humidity adjustment unit (e.g., a hot water coil, a cooling coil, a humidification nozzle, a separator, etc.) for adjusting the temperature and / or humidity of the supplied gas, but this is omitted in the figure.

[0067] The air intake side of the air conditioner 21 is connected to an external gas pipe 24 for taking in external gas, and return gas pipes 25 and 26 for taking in gas in the first packing chamber 3 and gas in the protection sheet supply chamber 5 from the exhaust devices (exhaust ports) 11a and 11c. In addition, the air supply side of the air conditioner 21 is connected to air supply pipes 27 and 28 for supplying clean gas from the air supply devices (air supply ports) 10a and 10c into the first packing chamber 3 and the protection sheet supply chamber 5.

[0068] By providing the air conditioner 21 in this way, the gas in the first packaging chamber 3 and the gas in the protection sheet supply chamber 5 can be circulated, and the cleanliness of these gases can be improved. That is, foreign matter can be more reliably prevented from adhering to the glass plate laminate L and the package X thereof.

[0069] (Third Embodiment)

[0070] like Figure 3As shown, the glass plate manufacturing apparatus 1 of the third embodiment is different from the second embodiment in that a first air conditioner 31 for circulating the gas in the first packing chamber 3 and a second air conditioner 32 for circulating the gas in the protection sheet supply chamber 5 are separately provided.

[0071] The internal structures of the first air conditioner 31 and the second air conditioner 32 are the same as the internal structure of the air conditioner 21 of the second embodiment.

[0072] The first air conditioner 31 is connected to a gas intake side with an external gas duct 33 for taking in external gas and a return gas duct 34 for taking in gas from the exhaust device (exhaust port) 11a in the first packing chamber 3. In addition, the first air conditioner 31 is connected to a gas supply duct 35 for supplying clean gas from the gas supply device (gas supply port) 10a to the first packing chamber 3.

[0073] Similarly, the side of the second air conditioner 32 for obtaining air is connected with an external air pipe 36 for obtaining external air and a return air pipe 37 for obtaining the air in the protective sheet supply chamber 5 from the exhaust device (exhaust port) 11c. In addition, the side of the second air conditioner 32 for supplying air is connected with an air supply pipe 38 for supplying clean air from the air supply device (air supply port) 10c to the protective sheet supply chamber 5.

[0074] By providing the first air conditioner 31 and the second air conditioner 32 in this way, the gas in the first packing chamber 3 and the gas in the protection sheet supply chamber 5 can be managed separately. The foreign matter mainly generated in the first packing chamber 3 is powder of packing materials such as the protection sheet S and glass powder. On the other hand, the foreign matter mainly generated in the protection sheet supply chamber 5 is powder of packing materials such as the protection sheet S, which contains almost no glass powder. Therefore, since the foreign matter generated in the first packing chamber 3 and the protection sheet supply chamber 5 is different, it is preferable to manage them separately as described above. In addition, by providing separate air conditioners 31 and 32, a single air conditioner can be miniaturized compared to the case of using a shared air conditioner. In addition, the piping structure of the pipes of each air conditioner 31 and 32 can also be simplified. Therefore, it is also advantageous in terms of equipment cost.

[0075] The present invention is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described effects. The present invention can be modified in various ways without departing from the gist of the present invention.

[0076] In the above-mentioned embodiment, the air pressure of each room 3 to 5 is managed by the air supply device 10a to 10c installed on the top and the exhaust device 11a to 11c installed on the floor. However, the air pressure management mechanism for managing the air pressure of each room 3 to 5 is not limited to this. For example, the air pressure management mechanism may be a structure that only includes the air supply device. In addition, the position of the air pressure management mechanism is not limited to the top or the floor, and can be changed appropriately.

[0077] In the above embodiment, the vertical glass plate G and the vertical protection sheet S are loaded on the vertical tray T in the first packing chamber 3. However, the horizontal glass plate G and the horizontal protection sheet S may be loaded on a horizontal (flat) tray.

[0078] In the above-mentioned embodiment, the case where the protection sheet supply chamber 5 is located above the first packaging chamber 3 is exemplified, but the positional relationship between the protection sheet supply chamber 5 and the first packaging chamber 3 is not limited thereto. For example, the protection sheet supply chamber 5 may be located below the first packaging chamber 3. In addition, the protection sheet supply chamber 5 may be omitted, and the protection sheet roll Sr may be arranged in the first packaging chamber 3.

[0079] In the above-mentioned embodiment, the loading process of loading the glass plates G and the protective sheet S on the tray T to obtain the tray T on which the glass plate laminated body L is loaded is performed in the first packaging chamber 3, and the final packaging process of attaching the position restriction member to the tray T on which the glass plate laminated body L is loaded or covering the glass plate laminated body L with the protective member C to obtain the glass plate package X is shown in the second packaging chamber 4. However, the content of the packaging operation in each chamber 3 and 4 is not limited to this. For example, when the first packaging chamber 3 has sufficient space, the above-mentioned loading process and the final packaging process may be performed in the first packaging chamber 3. In this case, the glass plate package X before being concentrated is stored in the second packaging chamber 4. It should be noted that usually, there is no extra space in the first packaging chamber 3 other than the working space of the loading device. Therefore, considering the production efficiency, it is preferable to unload the tray T with the glass plate laminate L to the second packaging chamber 4 after completing the loading process of one tray T and immediately arrange an empty tray T in the working space of the loading device in the first packaging chamber 3 .

[0080] In the above embodiment, the protective sheet S is obtained by cutting the strip-shaped sheet Sw to a predetermined length, but a single protective sheet S may be prepared in advance. In this case, the stacking step includes a step of supplying the protective sheet S from the protective sheet supply chamber 5 to the first packaging chamber 3 through the through hole 13, instead of the supply step and the cutting step.

[0081] In the above embodiment, it is preferable that the air pressure P1 of the first packaging chamber 3 is set higher than the air pressure P0 of the cutting chamber 2. This can prevent foreign matter such as glass powder generated in the cutting chamber 2 from flowing into the first packaging chamber 3.

[0082] In the second and third embodiments described above, the case where the air in the first packing chamber 3 and the air in the protective sheet supply chamber 5 are circulated by the air conditioners 21, 31, 32 is described, but the structure for circulating the air by the air conditioner may be provided only in the first packing chamber 3 or only in the protective sheet supply chamber 5, and may also be applied to other places such as the second packing chamber 4, the preparation chamber 6, and the inspection chamber. The position and number of the air supply port and the air exhaust port in each chamber are not particularly limited and can be appropriately changed according to the size of each chamber, the required cleanliness of the gas, etc.

[0083] In the above-mentioned embodiment, the case where the glass ribbon is formed by the overflow down-draw method has been described, but the glass ribbon may be formed by other well-known forming methods such as the slot down-draw method, the re-draw method, and the float method.

[0084] Description of Reference Numerals

[0085] 1 Glass sheet manufacturing device

[0086] 2 Cutting chamber

[0087] 3. First packing room

[0088] 4 Second Baling Room

[0089] 5 Protective sheet supply room

[0090] 6 Preparation Room

[0091] 10a~10c Air supply device

[0092] 11a~11c Exhaust device

[0093] 12a~12d Pressure sensor

[0094] 13 Through hole

[0095] 21, 31, 32 Air conditioner (air handling unit)

[0096] G Glass Plate

[0097] C Protective components

[0098] S Protective sheet

[0099] T Tray

[0100] X Glass sheet bale body.

Claims

1. A method for manufacturing a glass plate, characterized in that: The method for manufacturing the glass sheet comprises: A loading step of loading the glass plate and the protection sheet on a tray in a first packaging chamber so that the glass plate and the protection sheet are in contact with each other; a carrying-out step of carrying out the tray loaded with the glass plate and the protection sheet from the first packing chamber to another second packing chamber; and The final packing step includes a step of covering the glass plate and the protection sheet loaded on the tray with a protection member in the second packing chamber, The air pressure of the first packaging chamber is made higher than the air pressure of the second packaging chamber.

2. The method for manufacturing a glass plate according to claim 1, wherein: The air pressure in the second packaging chamber is made higher than the atmospheric pressure.

3. The method for producing a glass plate according to claim 1 or 2, wherein: The loading step further includes: supplying a strip-shaped sheet drawn from a protection sheet roll disposed in a protection sheet supply chamber from the protection sheet supply chamber to the first packaging chamber; and cutting the strip-shaped sheet supplied to the first packaging chamber into a predetermined length to obtain the protection sheet.

4. The method for manufacturing a glass plate according to claim 3, wherein: The air pressure in the protection sheet supply chamber is made higher than the atmospheric pressure.

5. The method for manufacturing a glass plate according to claim 3, wherein: The air pressure in the protection sheet supply chamber is made substantially the same as the air pressure in the first packaging chamber.

6. The method for manufacturing a glass plate according to claim 3, wherein: The protection sheet supply chamber is located above the first packaging chamber.

7. The method for manufacturing a glass plate according to claim 3, wherein: The gas in the first packaging chamber and / or the gas in the protection sheet supply chamber is circulated by an air conditioner including a filter unit.

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