JP2007099553A - Method for processing flat glass and apparatus for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely remove foreign substances from flat glass, and smoothly without damage carry in and out the flat glass to and from a processing table and process it. <P>SOLUTION: At a carry-in area E1 of the upstream side, flat glass G is washed, at least its bottom face, and floated horizontally by a liquid layer 3b formed on the processing table 3 by jetting out a liquid, and transferred onto the processing table 3. Then the liquid layer 3b on the processing table 3 is substantially removed and the flat glass G is processed. Subsequently, the liquid is jetted out again on the processing table 3 to form the liquid layer 3b. The flat glass G is washed, at least its bottom face, and floated horizontally by the liquid layer 3b, and carried out from the processing table 3 at a carry-out area E2 of the downstream side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and apparatus for processing plate glass, and more specifically, plate glass transferred from the upstream side onto a processing table in a horizontal posture, processed on the plate glass on the processing table, and then processed. The present invention relates to a plate glass processing method and apparatus for transferring glass in a horizontal posture from the processing table to the downstream side.

  As is well known, a plate glass used for manufacturing glass panels for various image display devices such as a plasma display, a liquid crystal display, an electroluminescence display, and a field emission display, and a substrate for forming various electronic display functional elements and thin films. As for the plate glass used as a glass plate, and the plate glass used as a base material for architectural window glass, it is currently being promoted to increase the plate size for the purpose of improving productivity.

  For these plate glasses, after finishing the forming process, predetermined slicing lines for cutting to a predetermined size or removing unnecessary portions, grinding / polishing of end faces (each side), etc. Is processed. It can be said that these processings are preferably performed in a state where the plate glass is placed on a processing table (surface plate) and firmly fixed and supported, but this type of plate glass is promoted to increase in size as described above. Therefore, the handling operation, that is, the transfer operation onto the processing table, the extraction operation from the processing table, and the like are forced to be difficult.

  In order to deal with such a problem, for example, according to Patent Documents 1 to 4 below, a plate glass is supported in a non-contact manner on a guide surface or a conveyance surface using a fluid, and is in a non-contact support state up to a processing position or a processing position. It is disclosed that the sheet glass is subjected to predetermined processing or processing after being conveyed by the above method.

  Specifically, in Patent Document 1, the bottom of a plate glass set in a substantially vertical posture is conveyed while being supported by a belt conveyor, and a fluid (gas) is applied to the surface of the plate glass in a substantially vertical posture along the conveyance direction. Alternatively, a configuration is disclosed in which a fluid guide for non-contact support is ejected by ejecting a liquid), and a vertical scribe line is engraved on a sheet glass at a predetermined position in the transport direction. Further, Patent Documents 2 to 4 disclose a configuration in which a horizontally oriented plate glass is conveyed in a state of being floated by gas (air) ejected from below, and among these, Patent Documents 2 and 3 are disclosed. It is described that a plate glass that is floated and transported by gas is stopped in a specific area and is fixedly held in the area by negative pressure suction, and in this state, predetermined processing and processing are performed on the plate glass. Yes.

JP 2004-167833 A JP 2004-182378 A JP 2004-231331 A JP 2000-62951 A

  However, although the plate glass processing facility disclosed in Patent Document 1 is designed so that the surface of the plate glass does not contact the guide surface using a fluid, the bottom surface of the plate glass is contacted and supported on the belt conveyor. This is a configuration that can cause contact scratches on the bottom surface of the glass sheet, and if vibration during transportation is large, this type of problem becomes even greater, causing cracks and even cracks. It becomes. Moreover, in light of the current situation in which the plate glass is made larger (for example, one side is made larger than 1500 mm or 2000 mm), the load acting on the bottom side of the plate glass increases due to the increase in weight, and the above-mentioned Problems such as contact scratches and cracks can be even more serious.

  Furthermore, although the above plate glass is supported in a non-contact manner in a substantially vertical posture, in order to prevent its falling, the plate glass is slightly inclined so that the upper side of the plate glass is closer to the lower side than the fluid guide that performs fluid ejection. Therefore, in order to keep the sheet glass in such a posture, it is necessary to make fine adjustments so that the fluid pressure ejected from the fluid guide to the surface of the sheet glass is slightly different between the upper part and the lower part. Can occur. For this reason, not only the control of the fluid pressure may be troublesome and complicated, but if the plate glass is a large plate (and further thin), it will be bent due to its own weight, making it difficult or substantially impossible to control the fluid pressure. It becomes impossible, and there is a possibility that the plate glass comes into contact with the fluid guide and is damaged, or the plate glass falls down and a fatal defect occurs.

  And it is more difficult to control the fluid pressure for supporting the plate glass in a non-contact manner in a substantially vertical posture slightly inclined when the fluid is a liquid such as water than when the fluid is a gas such as air. I can guess. That is, since the liquid ejected toward the surface of the plate glass flows down along the surface of the plate glass, the liquid flowing down from the upper part of the liquid and the liquid ejected from the central part or the lower part may collide with each other. The pressure alone does not uniquely determine the pressure that separates the plate glass from the fluid guide. Therefore, if the plate glass is large and is in a state where bending or the like is likely to occur, even if the liquid ejection pressure is simply set to match the posture of the plate glass, the plate glass does not have the required posture, As a result, the probability that the glass plate contacts the fluid guide or falls is increased.

  In addition, in the case of adopting a configuration in which the plate glass is supported in a non-contact manner by ejecting the liquid as described above, the effect that the foreign matter adhering to the plate glass is washed away by the liquid can be obtained. Under the state of flowing down along the surface of the plate, foreign matter adhering to the surface of the plate glass is spread over the entire surface because the liquid cannot be supplied to the entire surface of the plate glass with a uniform jet pressure. It cannot be washed off under uniform conditions. For this reason, for example, there is a risk that the supply of liquid to the upper portion of the plate glass is insufficient and foreign matters remain on the upper portion, or foreign matters that have flowed down together with the liquid from the upper portion of the plate glass accumulate and remain in the lower portion. In addition, it is difficult to accurately remove glass powder and other dust adhering to the plate glass, for example, during conveyance in the previous process.

  On the other hand, since the conveyance method of the plate glass disclosed in the above Patent Documents 2 to 4 is that the plate glass is floated and conveyed in a horizontal posture by jetting air, the glass adhered to the lower surface of the plate glass in the previous step or the like Foreign matter such as powder or foreign matter such as dust generated along with the conveyance of the plate glass is scattered by the ejection of air. The scattered foreign matter falls on the upper surface of the plate glass and often remains attached in a state where it is difficult to remove due to static electricity or the like, which causes a reduction in the quality of the plate glass.

  The present invention has been made in view of the above circumstances, and can prevent the fluid ejected onto the surface of the plate glass from unduly changing the posture of the plate glass so that even a large plate glass can be floated appropriately in a horizontal posture. In addition, the liquid glass can be carried into and out of the processing table, and the processing can be smoothly performed while ensuring the removal of the foreign material without causing an undue bias in the foreign material removal action on the entire surface of the plate glass by the liquid. Let it be a technical issue to make it happen without damage.

  The processing method of the plate glass according to the present invention made to solve the above technical problem is that at least the lower surface of the plate glass is formed in the upstream carry-in area by the liquid layer formed as the liquid is ejected on the processing table. The plate glass is transferred to the processing table while being floated in a horizontal posture, the liquid layer on the processing table is substantially removed to process the plate glass, and then the processing table is used. The liquid is ejected again to form a liquid layer, and at least the lower surface of the plate glass is washed by the liquid layer, and the plate glass is floated in a horizontal posture and is carried out from the processing table in the downstream carry-out area. Characterized.

  According to such a method, for example, the plate glass that has been transported in a horizontal posture by a transport means such as a transport conveyor on the upstream side is transferred onto the processing table in the carry-in area. The liquid glass already ejected and formed on the table is performed in a state where the plate glass is floated in a horizontal posture, and at the time of transfer, at least the lower surface of the plate glass is washed by the fluid layer. In this case, if the liquid is ejected onto the processing table, the liquid surface of the liquid layer naturally approaches a flat state, and even if the liquid ejection pressure is made uniform throughout the entire area, the plate glass is not adversely affected. Therefore, if the plate glass is floated on the liquid surface of the liquid layer, it is possible to avoid contact with the processing table surface due to the unjustly deviating posture of the plate glass, and a large plate glass (for example, 2000 mm × 4000 mm or more). Even so, it will surface well in a horizontal position. In addition, since at least the entire area of the lower surface of the plate glass is subjected to a jet pressure that is not unreasonably biased, even if foreign matter such as glass powder or dust adheres to the lower surface of the glass plate, it will be applied to a part of the lower surface. It is washed away properly without sticking. In this way, after the plate glass is transferred to a predetermined position on the processing table, the liquid layer on the processing table is substantially removed, that is, even if the table surface is slightly wet. Therefore, the plate glass is in contact with the processing table, and in this state, the plate glass is processed. In this way, even if the plate glass contacts the processing table, the foreign matter is removed and washed away from the lower surface of the plate glass, so the probability that foreign matter is interposed between the plate glass and the processing table is drastically reduced, and the lower surface of the plate glass. It is difficult to cause a problem that the contact scratch is attached to the surface. After this, a liquid layer is formed again on the processing table, and the plate glass floats on the liquid surface of the liquid layer, and is transferred in a horizontal position to a conveying means such as a conveying conveyor on the downstream side in the carry-out area. It will follow. In this case, foreign substances such as glass powder generated by the above processing may adhere to the lower surface of the plate glass, but since the lower surface of the plate glass is washed with the liquid layer in the same manner as described above, In such a case, no such foreign matter adheres and remains, and even after being transferred to the transport means, the foreign matter is less likely to cause defects such as scratches on the lower surface of the plate glass.

  In this case, the plate glass may slide on the surface of the liquid layer in the carry-in area, and the plate glass may slide on the surface of the liquid layer in the carry-out area.

  In this way, since the plate glass slides on the surface (liquid level) of the liquid layer and is sent to a predetermined processing position on the processing table in the carry-in area, the lower surface of the plate glass is washed by the sliding. It is promoted, and the foreign substance removing action is further improved. Similarly, cleaning of the lower surface of the plate glass is also promoted in the carry-out area.

  In the above method, it is preferable to supply the cleaning liquid at least to the processed portion when processing the plate glass or after the processing.

  In this way, when engraving a scribe line, which will be described later, on the upper surface of the plate glass, or when performing processing such as grinding and polishing the end surface of the plate glass, while performing the processing or after performing the processing By supplying the cleaning liquid to the processed portion and the entire upper surface of the plate glass, it is possible to wash away glass powder that may adhere to the plate glass and be difficult to remove. And even if the glass powder and the like generated by this processing remain on the processing table, the glass powder and the like can be washed away by the liquid layer formed on the processing table after that, resulting in the processing. The foreign substance removing action is ensured.

  Furthermore, it is preferable that the liquid ejected on the processing table to form the liquid layer flows out of the processing table, passes through the foreign matter filtering filter, and is ejected again on the processing table to form the liquid layer. .

  In this way, the liquid used to form the liquid layer on the processing table can be used again as a clean liquid by passing through the foreign matter filter, that is, the same liquid can be circulated and used. It is possible to secure an advantage in terms of cost.

  Further, it is preferable to process the plate glass in a state where the plate glass is brought into contact with the processing table by a negative pressure suction force.

  In this way, when processing the plate glass, the plate glass is securely fixed and supported on the processing table by the negative pressure suction attractive force, so that good workability can be obtained and the processing operation can be performed appropriately. Is achieved.

  Examples of the processing in the above method include processing of engraving a scribe line composed of a straight line or a curved line on the upper surface of the plate glass.

  Here, the scribe line composed of the above straight line may be, for example, a reference line for splitting a plate glass into two or more parts, or a reference line for splitting when removing unnecessary portions. It may be. Further, the scribe line composed of the above-mentioned curved line may be a reference line for splitting when removing the periphery of the glass plate to obtain, for example, a circular or elliptical plate glass, or a large curvature at the corner of the plate glass. It may be a reference line for splitting when the periphery is removed to form a radius R chamfer.

  Moreover, as another process in the above method, the process which contains 2 types, the line in alignment with a vertical direction, and the line in alignment with a horizontal direction, on the upper surface of plate glass can be mentioned.

  In this way, even if the plate glass is not rotated by 90 °, the scribe lines along the two orthogonal directions can be engraved on the plate glass in the same posture, and the work efficiency can be improved.

  On the other hand, a processing apparatus for a plate glass according to the present invention, which has been made to solve the above technical problem, is an upstream carry-in area, in which a sheet of plate glass is formed by a liquid layer formed along with a liquid jet on a processing table. At least the lower surface is washed and the plate glass is transferred to the processing table while being floated in a horizontal posture, and the fluid layer is substantially removed on the processing table when processing the plate glass on the processing table. In the downstream carry-out area, the liquid layer formed by ejecting the liquid again onto the processing table cleans at least the lower surface of the plate glass and floats the plate glass in a horizontal posture. It is characterized by being configured to be carried out from the table.

  This plate glass processing apparatus has substantially the same structural elements as the basic plate glass processing method already described. Therefore, matters relating to the effects and the like of this processing apparatus are the same as the above-mentioned basics. Since the processing method is the same as that already described, the description thereof is omitted here for convenience.

  As described above, according to the plate glass processing method and apparatus according to the present invention, when the plate glass is transferred onto the processing table in the upstream carry-in area, even if it is a large plate glass, its posture is unfairly distorted. While avoiding contact with the processing table surface due to this, it is possible to levitate well in a horizontal posture, and at least the entire lower surface of the plate glass is subjected to an unbiased ejection pressure, so that the lower surface Even if foreign matter such as glass powder or dust adheres to the surface, they are washed away without adhering to a part of the lower surface of the plate glass. Furthermore, even when the plate glass comes into contact with the processing table when processing the plate glass, foreign matter is removed and washed away from the lower surface of the plate glass, so the probability that foreign matter is interposed between the plate glass and the processing table is drastically reduced. The problem of contact scratches on the lower surface of the glass sheet is less likely to occur. Moreover, even when foreign matter such as glass powder generated by the above processing adheres to the lower surface of the plate glass when the plate glass is carried out in the downstream carry-out area, the lower surface of the plate glass is washed by the liquid layer, and such foreign matter Will not remain.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1-5 has illustrated schematic structure and the operation | movement of the processing apparatus of the plate glass which concern on embodiment of this invention. First, the configuration of a sheet glass processing apparatus will be described with reference to FIGS. 1, 2 and 3. The processing apparatus 1 extends in a straight line from an upstream carry-in area E1 to a downstream carry-out area E2. A pair of guide rails 2 is provided, and a processing table (surface plate) 3 is held on the guide rails 2 so as to be reciprocable in the ab direction. That is, the processing table 3 is configured to move forward in the a direction and return in the b direction between the carry-in area E1 and the carry-out area E2.

  The processing table 3 has a large number of ejection holes 3a formed on the upper surface thereof (see FIG. 3), and liquid (water in this embodiment) is ejected from these ejection holes 3a with a uniform ejection pressure. A liquid layer 3 b for floating the plate glass G in a horizontal posture is formed on the plate 3. The liquid ejected onto the processing table 3 to form the liquid layer 3b is once discharged to the outside, passes through a foreign matter filtering filter (not shown), and then ejected from the ejection hole 3a of the processing table 3 again. Layer 3b is formed. Further, the processing apparatus 1 is a negative pressure suction means (not shown) that applies a negative pressure suction force to the lower surface of the plate glass G when the liquid layer 3b floating the plate glass G is substantially removed from the processing table 3. Abbreviation).

  Further, the pair of guide rails 2 hold a scribe unit 4 that moves integrally with the processing table 3 in a partial region (or all regions) corresponding to processing. The scribe unit 4 holds a pair of first scribe blades 4a for engraving a scribe line along the vertical direction (a-b direction) on the upper surface of the plate glass G, and can move integrally with the processing table 3 in the above-described region. Holding a horizontal member 4x and a pair of second scribe blades 4b that engrave a scribe line along the horizontal direction (a direction perpendicular to the ab direction) and holding the horizontal member 4x to be slidable in the horizontal direction The vertical member 4y is provided. In addition, the processing apparatus 1 is configured to inject and supply a cleaning liquid (water in this embodiment) to the scribe line while engraving or engraving the scribe line on the upper surface of the plate glass G from above. There is a cleaning liquid supply means (not shown) for washing away foreign substances such as glass powder generated along with the engraving of the line. A plurality of the cleaning liquid supply means may be provided so as to correspond to the first scribe blade 4a and the second scribe blade 4b, respectively, and may move integrally with the scribe blades 4a and 4b. Alternatively, it may be fixed on the processing table 3.

  Each of the pair of guide rails 2 is movable in the horizontal and vertical directions, guides the movement of the glass sheet G in the carry-in area E1 and the carry-out area E2, and positions the glass sheet G on the processing table 3. The guide member 5 to be held is held. The pair of guide members 5 may be disposed at one place as shown in the figure, but, for example, disposed at two places, a portion corresponding to the carry-in area E1 and a portion corresponding to the carry-out area E2. May be.

  Further, an upstream conveyor 6 that conveys the plate glass G in a horizontal posture and sends it out to the carry-in area E1 is disposed immediately upstream of the carry-in area E1, and the plate glass G is placed immediately downstream from the carry-out area E2. A downstream-side conveyor 7 that is received from the carry-out area E2 and transported in a horizontal posture is disposed. In this embodiment, the upstream conveyor 6 includes a long immovable conveyor 6a installed at a fixed position, and a short movable conveyor 6b that can move downstream from the immobile conveyor 6a independently. The downstream conveyor 7 is also composed of a long immovable conveyor 7a installed at a fixed position, and a short movable conveyor 7b that can be moved upstream from the immobile conveyor 7a. Yes.

  Next, operation | movement of the processing apparatus 1 of the plate glass provided with the above structure is demonstrated later on. The plate glass G processed by the processing apparatus 1 has a horizontal dimension of 2000 to 3000 mm, a vertical dimension of 3000 to 5000 mm, and a thickness of 1.5 to 3 mm, and is used for manufacturing a panel of a plasma display. Is.

  First, as shown in FIG. 1, the plate glass G conveyed by the upstream conveyor 6 is sandwiched by a pair of guide members 5 in the carry-in area E <b> 1, guided and moved, and transferred onto the processing table 3. . In this case, since the liquid layer 3b is formed on the processing table 3 when the plate glass G reaches the carry-in area E1, at least the lower surface of the plate glass G is cleaned by the liquid layer 3b and on the liquid layer 3b. It is transferred onto the processing table 3 in a state of floating in a horizontal posture. In addition, a pair of guide member 5 guides the movement in the state which hold | gripped both the edges of the horizontal direction in the downstream edge part of the plate glass G. FIG.

  When the transfer of the plate glass G shown in FIG. 1 onto the processing table 3 is started, the processing table 3 moves backward in the b direction, and at the same time, the plate glass G is moved in the a direction by the upstream conveyor 6 (movable conveyor 6a). Since it is conveyed, the plate glass G is transferred onto the processing table 3 while sliding on the surface of the liquid layer 3b at a high speed corresponding to the total of the respective moving speeds.

  As shown in FIG. 2, when such an operation is performed and the processing table 3 reaches the return end in the direction b, as shown in FIG. 2, the plate glass G floats on the liquid layer 3b and performs predetermined processing. The position reaches the position, and the pair of guide members 5 moves to the carry-out area E2 and stands by. At this time, the liquid layer 3b on the processing table 3 is substantially removed, the lower surface of the plate glass G comes into contact with the upper surface of the processing table 3, and the plate glass G is firmly attached to the upper surface of the processing table 3 by negative pressure suction force. Fixedly supported. Further, immediately before or after such a fixing of the glass sheet G is performed, the processing table 3 moves forward in the direction a.

  While the processing table 3 is moving forward in the direction a, as shown in FIG. 3, the vertical member 4 y of the scribe unit 4 slides in the horizontal direction. The scribe unit 4 is the same as the processing table 3. Since the plate moves at a speed in the direction a, a pair of scribe lines extending in a straight line in the horizontal direction are engraved on the upper surface of the plate glass G by the pair of second scribe blades 4b held by the vertical member 4y. Established. While the scribe line is engraved, the cleaning liquid is jetted and supplied from the cleaning liquid supply means toward the scribe line (or the entire upper surface of the plate glass G) (when the scribe line is engraved below) The same). After the scribe line is engraved over the entire lateral length of the glass sheet G, the processing table 3 continues to move in the direction a, whereas the scribe unit 4 stops. A pair of scribe lines extending in a straight line in the vertical direction are engraved on the upper surface of the first scriber blade 4a held by the horizontal member 4x.

  After such an operation is continuously performed and a scribe line along the vertical direction is engraved over the entire length in the vertical direction of the glass sheet G, the liquid layer 3b is again formed on the processing table 3 as shown in FIG. Is formed, and the glass sheet G is floated by the liquid layer 3b. In this state, when the processing table 3 continues to move slightly in the direction a, the glass sheet G is guided and moved by the pair of guide members 5 in the same manner as described above.

  Then, as shown in FIG. 5, as the processing table 3 reaches the vicinity of the forward end in the direction a, the glass plate G is lifted by the liquid layer 3b in the carry-out area E2 and is processed by the pair of guide members 5. It is received by the downstream conveyor 7 from above. At the time of reception, the glass sheet G is firstly received by the movable conveyor 7b protruding in the upstream side while sliding on the surface of the liquid layer 3b, and then transferred to the immobile conveyor 7a.

  By performing such an operation, when the transfer of the glass sheet G to the downstream conveyor 7 is completed, the glass sheet G is conveyed downstream by the downstream conveyor 7 and the processing table 3 is a liquid layer. It moves backward in the b direction while 3b is still formed. Then, as shown in FIG. 1, the subsequent glass sheet G is again transferred onto the processing table 3 in the same procedure as described above, and the same operation as described above is repeatedly executed.

  Therefore, the processing table 3 continuously reciprocates in the ab direction, and finishes the scribe line engraving work for the glass sheet G when the processing table 3 moves in the a direction, and in the carry-out area E2. The processing table 3 that has finished carrying out the plate glass G moves backward in the direction b to reach the carry-in area E1, and at the same time, the subsequent plate glass G is conveyed by the upstream conveyor 6 to the carry-in area E1. Thereby, the plate glass G conveyed by the upstream conveyor 6 is continuously transferred onto the processing table 3 without being stopped, and continuously without being stopped by the processing table 3 after being transferred. And it moves to a direction, and is continuously transferred from the process table 3 to the downstream conveyor 7 without stopping. As described above, the plate glass G moves continuously, and processing for engraving the scribe line during the movement is performed. As a result, the work efficiency is improved, and the productivity is greatly improved.

  Moreover, while the plate glass G is being transferred onto the processing table 3 in the carry-in area E1, at least the lower surface of the plate glass G is washed by the liquid layer 3b, so that the plate glass G is conveyed by the upstream conveyor 6. Even if foreign matter is sometimes attached to the lower surface, the foreign matter is washed away when the plate glass G is transferred to the processing table 3. And since the lower surface of the plate glass G contacts the table surface of the processing table 3 by the removal of the liquid layer 3b after the lower surface of the plate glass G is cleaned, there is a problem that the both surfaces come into contact with foreign matter interposed. Avoided. Moreover, after the scribe line is engraved on the sheet glass G, the sheet glass G is lifted again by the liquid layer 3b and transferred to the downstream conveyor 7 in the carry-out area E2, so that glass powder generated at the time of engraving the scribe line, etc. Even if it adheres to the lower surface of the plate glass G, the glass powder is washed away by the liquid layer 3 b when the plate glass G is transferred to the downstream conveyor 7.

  In the above embodiment, the machining table 3 is configured to reciprocate between the carry-in area E1 and the carry-out area E2. In addition, the machining table 3 is fixedly installed at a fixed position, and the machining table is also provided. 3, an upstream conveyor 6 and a downstream conveyor 7 adjacent to the upstream side and the downstream side, respectively, are disposed between the processing table 3 and the upstream conveyor 6 and the downstream conveyor 7. In addition, a carry-out area may be formed.

  Moreover, although the said embodiment applied this invention to the processing apparatus 1 of the plate glass G used for manufacture of the panel of a plasma display, in addition to this, for manufacture of panels, such as a liquid crystal display, an electroluminescent display, a field emission display, etc. About the processing apparatus of the plate glass used, the processing apparatus of the plate glass used as a base material for forming various electronic display functional elements and thin films, and also the processing apparatus of the plate glass used as the base material of the window glass for building, Similarly, the present invention can be applied.

  Furthermore, although the said embodiment applied this invention when engraving a scribe line as a process given to sheet glass, also when processing other than this, for example, the end surface (each side) of sheet glass, The present invention can be applied.

It is a schematic perspective view which shows typically the processing apparatus (The state which has transferred the plate glass on the process table from the upstream conveyor) which concerns on embodiment of this invention. It is a schematic perspective view which shows typically the processing apparatus (The state immediately after plate glass was transferred on the processing table) of the plate glass which concerns on embodiment of this invention. It is a schematic perspective view which shows typically the processing apparatus (state which is processing the plate glass on the processing table) concerning the plate glass concerning the embodiment of the present invention. It is a schematic perspective view which shows typically the processing apparatus (state in which the plate glass which finished processing on the process table is conveyed) which concerns on embodiment of this invention. It is a schematic perspective view which shows typically the processing apparatus (The state which is delivering the plate glass to the downstream conveyor from the processing table) concerning the embodiment of this invention.

Explanation of symbols

1 Sheet glass processing equipment 3 Processing table (surface plate)
3b Liquid layer 4 Scribe unit 6 Upstream conveyor 7 Downstream conveyor E1 Loading area E2 Unloading area G Plate glass

Claims (8)

  In the upstream carry-in area, the liquid layer formed on the processing table as the liquid was ejected was transferred onto the processing table while cleaning at least the lower surface of the plate glass and floating the plate glass in a horizontal posture. Thereafter, the liquid layer on the processing table is substantially removed to process the plate glass. After that, the liquid is sprayed again on the processing table to form a liquid layer. A processing method of a plate glass, wherein at least the lower surface is washed and the plate glass is floated in a horizontal posture and unloaded from the processing table in a downstream unloading area.   The plate glass processing method according to claim 1, wherein the plate glass slides on the surface of the liquid layer in the carry-in area, and the plate glass slides on the surface of the liquid layer in the carry-out area.   The processing method of a plate glass according to claim 1 or 2, wherein a cleaning liquid is supplied to at least a processed portion when or after the plate glass is processed.   The liquid ejected onto the processing table to form a liquid layer flows out of the processing table, passes through a foreign matter filtering filter, and is ejected onto the processing table again to form a liquid layer. The processing method of the plate glass in any one of Claims 1-3 to do.   The processing method of the plate glass according to any one of claims 1 to 4, wherein the plate glass is processed in a state in which the plate glass is brought into contact with the processing table by a negative pressure suction force.   6. The processing method of a plate glass according to claim 1, wherein the processing is a processing of engraving a scribe line made of a straight line or a curved line on an upper surface of the plate glass.   6. The processing method for a plate glass according to any one of claims 1 to 5, wherein the processing is processing including two types of a line along a vertical direction and a line along a horizontal direction on an upper surface of the plate glass.   In the upstream carry-in area, the liquid layer formed as the liquid is ejected on the processing table cleans at least the lower surface of the plate glass and transfers the plate glass to the processing table while floating in a horizontal posture. And, at the time of processing to the plate glass on the processing table, the fluid layer is substantially removed to bring the plate glass into contact with the processing table, and the liquid is ejected again onto the processing table in the downstream carry-out area. An apparatus for processing a plate glass, wherein the liquid layer formed as described above is configured to be carried out from the processing table while cleaning at least the lower surface of the plate glass and floating the plate glass in a horizontal posture.

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