JP2015101020A - Method and device for stacking glass plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stack a supporting glass plate on a product glass plate while aligning them correctly without contacting an upper surface of the supporting glass plate.SOLUTION: A flat supporting glass plate Gb is brought into contact with a lower end portion X of the bottom face of a product glass plate Ga by being raised while the product glass plate Ga is stationary and flexed downward in a convex shape by having two opposing sides of the product glass plate Ga supported from the bottom surface side. In this state, a contact region Y of the supporting glass plate Gb and the product glass plate Ga is expanded from the lower end portion X of the product glass plate Ga toward the two opposite sides by gradually releasing the convex flexure of the product glass plate Ga.

Description

  The present invention relates to an improvement in a technique for laminating a product plate glass on a support plate glass.

  In recent years, thin plate glass has been used in various fields, as represented by glass substrates for flat panel displays. This is because various advantages such as a reduction in weight and an improvement in flexibility can be obtained by thinning the plate glass.

  However, on the other hand, thin glass plates have the disadvantage that they are easily broken and difficult to handle.

  Therefore, for example, Patent Document 1 discloses that manufacturing-related processing such as heat treatment (slow cooling, film formation, etc.) is performed on a product plate glass in a laminated state in which a thin product plate glass is placed on a support plate glass. Yes.

JP 2011-183792 A

  By the way, as disclosed in Patent Document 1, when the product plate glass is handled in a laminated state placed on the support plate glass, it is necessary to correctly position the product plate glass on the support plate glass. Indispensable.

  However, Patent Document 1 does not specifically describe a method for placing the product plate glass on the support plate glass, and the following various problems may occur in a general plate glass placing method.

  That is, after the product plate glass is transferred to the vicinity of the upper portion of the support plate glass, the support of the product plate glass is released, and when the product plate glass is dropped and placed on the support plate glass, it is placed between the product plate glass and the support plate glass. Air enters. When air enters in this way, a problem arises in that the product glass sheet slips due to the air layer and cannot be positioned correctly with respect to the support glass sheet.

  In addition, it is conceivable to prevent the product plate glass from slipping by supporting the upper surface of the product plate glass by adsorption or the like until the product plate glass contacts the upper surface of the support plate glass. However, the quality of the upper surface of the product plate glass is guaranteed. Therefore, it is not desirable to bring other members into contact with each other.

  This invention makes it a subject to laminate | stack in the state which positioned the product plate glass correctly in the support plate glass, without touching the upper surface of a product plate glass in view of the said situation.

  The present invention devised to solve the above problems is a method of laminating the product plate glass on the support plate glass without touching the upper surface of the product plate glass, and the two opposite sides of the product plate glass are on the lower surface side. The product plate glass is bent downwardly in a convex shape to be stationary, and the flat support plate glass is raised and brought into contact with the lower end of the lower surface of the product plate glass, and then the product The contact area between the support plate glass and the product plate glass is gradually expanded from the lower end portion of the product plate glass to the two opposite sides by gradually releasing the convex bending of the plate glass. .

  According to such a configuration, the flat support plate glass rises toward the product plate glass that is bent downward and comes into contact with the lower end portion of the product plate glass. Thereby, the lower end part of product plate glass and the upper surface of support plate glass contact each other, and it adheres. At this time, since the support plate glass rises so as to pick up the product glass, it is not necessary to move the product plate glass whose posture is likely to be unstable due to bending. As a result, the lower end portion of the product plate glass and the support plate glass can be accurately brought into contact with each other at a predetermined position. And in this state, if the contact area | region of support plate glass and product plate glass is expanded from the lower end part of product plate glass to the 2 side side which opposes by canceling | releasing the convex bending of product plate glass, between both plate glass Since the adhesion force due to the contact area formed first is maintained, the product plate glass hardly slides on the support plate glass. Therefore, the product plate glass can be laminated in a state where the product plate glass is correctly positioned on the support plate glass without touching the upper surface of the product plate glass.

  Said structure WHEREIN: It is preferable that the said support plate glass stops a raise at the position, after raising the said lower end part of the said product plate glass by predetermined amount.

  If it does in this way, since the lower end part of product plate glass will be strongly pressed down to support plate glass, the adhesion power of the contact field formed between both plate glasses will increase. As a result, the product plate glass becomes more difficult to slide with respect to the support plate glass, and the positioning accuracy of both plate glasses is further improved.

  Said structure WHEREIN: It is preferable to each support the lower surface of 2 sides which the said product plate glass opposes with the several support roller rotatable around the axis | shaft parallel to the 2 sides which oppose.

  If it does in this way, when releasing the bending of product plate glass, product plate glass will move smoothly on a plurality of support rollers, and it can control shaking, and it will become difficult to be damaged on the undersurface of product plate glass.

  In this case, it is preferable that a support surface formed by the plurality of support rollers is inclined downward toward the lower end portion of the product sheet glass.

  If it does in this way, a product plate glass will receive the force attracted to the lower end part of product glass by dead weight. Therefore, if the support roller is pulled out from the lower surface of the product glass, the product glass automatically slides down on the support roller, and the product plate glass can be easily and reliably released from bending.

  In the above-described configuration, a fork-like support body is formed from the gaps between the plurality of support pins on the lower surface sides of the two opposite sides of the product plate glass in a state where the product plate glass is supported flatly by a plurality of support pins. The plurality of support pins are lowered relative to the support to transfer the product plate glass from the plurality of support pins to the support, and the product plate glass has a convex shape. When releasing the bending gradually, the support may be pulled out from the lower surfaces of the two opposite sides of the product sheet glass.

  If it does in this way, the flat product plate glass supported with the support pin can be easily and reliably transferred to a fork-shaped support body. And the product plate glass which transferred to the support body will be in the state which bent below convexly because the lower surface of 2 sides which opposes is supported by a support body. Therefore, the bent posture of the product plate glass before being brought into contact with the support plate glass can be formed smoothly, and the bending of the product plate glass can be easily released by pulling out the support body.

  Said structure WHEREIN: As for the said product plate glass, it is preferable that one side is 1000 mm or less, and thickness is 0.7 mm or less.

  If it does in this way, it will be easy to bend a product plate glass convexly downward, and will also be easy to stabilize the curvature posture.

  The present invention devised to solve the above problems is an apparatus for laminating the product plate glass on the support plate glass without touching the upper surface of the product plate glass so that the product plate glass is bent downwardly in a convex shape. First supporting means for supporting two opposite sides of the product plate glass from the lower surface side, and second supporting means for supporting the support plate glass from the lower surface side so that the support plate glass is flat. The product plate glass supported by the first support means is stationary, the support plate glass supported by the second support means is raised, and the lower end portion of the lower surface of the product plate glass is contacted Then, by gradually pulling out the first support means from the lower surface of the product plate glass, the contact area between the support plate glass and the product plate glass is changed to the product plate glass. Wherein the expanding the two sides side which is the opposite from the lower end.

  According to such a structure, the same effect as the corresponding structure already demonstrated can be enjoyed.

  In the above configuration, the first support means is configured to support the lower surfaces of the two opposite sides of the product sheet glass with a plurality of support rollers that are rotatable around an axis parallel to the two opposite sides. It is preferable that

  In this way, it is possible to enjoy the same operational effects as the corresponding configuration already described.

  In this case, it is preferable that a support surface formed by the plurality of support rollers is inclined downward toward the lower end side of the product sheet glass.

  In this way, it is possible to enjoy the same operational effects as the corresponding configuration already described.

  Said structure WHEREIN: While further providing the several support pin which can be raised / lowered while supporting the said product plate glass flatly, the said 1st support means is the 2 which the said product plate glass opposes from the clearance gap between the said some support pins. You may provide the fork-like support body which can move forward / backward on the lower surface side of each edge | side.

  In this way, it is possible to enjoy the same operational effects as the corresponding configuration already described.

  As described above, according to the present invention, the product plate glass can be laminated in a state where the product plate glass is correctly positioned on the support plate glass without touching the upper surface of the product plate glass.

It is a top view which shows typically the whole structure of the lamination apparatus of the plate glass which concerns on embodiment of this invention. It is a longitudinal cross-sectional view for demonstrating the lamination method of the plate glass by the plate glass lamination apparatus which concerns on this embodiment. It is a longitudinal cross-sectional view for demonstrating the lamination method of the plate glass by the plate glass lamination apparatus which concerns on this embodiment. It is a longitudinal cross-sectional view for demonstrating the lamination method of the plate glass by the plate glass lamination apparatus which concerns on this embodiment. It is a longitudinal cross-sectional view for demonstrating the lamination method of the plate glass by the plate glass lamination apparatus which concerns on this embodiment. FIG. 6 is an enlarged view of a region A shown in FIG. 5, in which (a) shows a state in which the product plate glass and the support plate glass are first contacted, and (b) shows the support plate glass from the position where the product plate glass and the support plate glass first contact Furthermore, it shows a state where it has risen by a predetermined amount. It is a longitudinal cross-sectional view for demonstrating the lamination method of the plate glass by the plate glass lamination apparatus which concerns on this embodiment. It is a longitudinal cross-sectional view for demonstrating the lamination method of the plate glass by the plate glass lamination apparatus which concerns on this embodiment.

  As shown in FIG. 1, a sheet glass laminating apparatus according to an embodiment of the present invention includes a conveyance line 1 that conveys product sheet glass Ga and support sheet glass Gb, and a lamination zone WS provided in the conveyance line 1. In order to laminate the product plate glass Ga on the upper surface of the support plate glass Gb, a first support unit 2 and a second support unit 3 that cooperate with each other are provided.

  The conveyance line 1 has a first conveyance line 11 that conveys the product plate glass Ga, a second conveyance line 12 that conveys the support plate glass Gb, and the conveyance lines 11 and 12, upstream of the lamination zone WS. The product plate glass Ga and the support plate glass Gb are provided with a third transport line 13 that is alternately transported. Furthermore, the conveyance line 1 is provided with the 4th conveyance line 14 which conveys the laminated body G by which the product plate glass Ga was laminated | stacked on the support plate glass Gb in the downstream of the lamination | stacking zone WS. In addition, as a conveyance means of the conveyance line 1, although various conveyance forms, such as a roller, a belt, an air float, and a water float, can be utilized, a roller is used in this embodiment. Further, on the upstream side of the lamination zone WS, the conveyance line 1 may be constituted by one conveyance line, and the product plate glass Ga and the support plate glass Gb may be alternately conveyed on the conveyance line.

  The 1st support means 2 is provided in the both sides of the lamination | stacking zone WS, respectively, and supports the product plate glass Ga in the state bent below convexly (refer FIG. 4). Each of the first support means 2 can move back and forth in a direction orthogonal to the transport direction as indicated by an arrow in the figure, and a plurality of (five in the illustrated example) arranged at intervals in the transport direction. A fork-shaped support body including a support arm 21 is provided. In each support arm 21, a plurality of support rollers 22 that are in direct contact with the lower surfaces of two sides facing each other in the direction orthogonal to the conveying direction in the product plate glass Ga are arranged. Each support roller 22 is composed of a free roller that is driven to rotate around a rotation axis parallel to two opposite sides of the product sheet glass Ga. Here, the rotation axis parallel to the two opposite sides does not mean only when the two opposite sides are geometrically parallel, and may be slightly inclined with respect to the two opposite sides. The range that is considered to be substantially parallel is also included. In this embodiment, the support arm 21 of the first support means 2 moves only in the direction orthogonal to the transport direction during the stacking operation, and its height position is always constant. Of course, depending on the size and thickness of the product plate glass Ga, the height and inclination of the pair of support arms 21 and the distance between them can be appropriately adjusted.

  The 2nd support means 3 is provided so that it may overlap with lamination | stacking zone WS, and supports product plate glass Ga or support plate glass Gb in flat shape (refer FIG.2 and FIG.6). The second support means 3 includes a plurality of support pins 31 that are in direct contact with the lower surface of the product plate glass Ga or the support plate glass Gb. Each support pin 31 is provided between each support arm 21, and as will be described later, each support arm 21 and each support roller 22 even if all the support pins 31 are moved up and down integrally in the stacking zone WS. So that it doesn't interfere with.

  Here, the product plate glass Ga has, for example, one side of 300 mm to 1000 mm and a thickness of 0.3 mm to 0.5 mm. On the other hand, the support plate glass Gb is larger in length and thickness on one side than the product plate glass Ga. For example, one side is 400 mm to 1100 mm and the thickness is 0.4 mm to 1.0 mm. Of course, the product plate glass Ga and the support plate glass Gb may have the same plane size.

As the product plate glass Ga and the support plate glass Gb, silicate glass, silica glass, borosilicate glass, alkali-free glass or the like is used. However, when heat treatment is performed in the state of the laminate G, it is preferable to use glasses in which the difference in coefficient of linear thermal expansion between the product plate glass Ga and the support plate glass Gb is within 5 × 10 ⁻⁷ / ° C. It is more preferable to use a glass having the following composition.

In order to improve the peelability of the product plate glass Ga and the support plate glass Gb, an inorganic thin film may be formed on the upper surface of the support plate glass Gb. Examples of the inorganic thin film include ITO, Ti, Si, Au, Ag, Al, Cr, Cu, Mg, Ti, SiO, SiO ₂ , Al ₂ O ₃ , MgO, Y ₂ O ₃ , L ₂ O ₃ , and Pr. ₆ O ₁₁ , Sc ₂ O ₃ , WO ₃ , HfO ₂ , In ₂ O ₃ , ZrO ₂ , Nd ₂ O ₃ , Ta ₂ O ₅ , CeO, Nb ₂ O ₅ , TiO, TiO ₂ , Ti ₃ O ₅ , A thin film made of one or more materials selected from NiO and ZnO can be used.

  Next, a method for laminating plate glass using the plate glass laminating apparatus configured as described above will be described.

  First, as shown in FIG. 2, the product sheet glass Ga is conveyed to the lamination zone WS by the plurality of conveyance rollers 15 of the conveyance line 1. Thereafter, as shown by a one-dot chain line in the drawing, the lifting mechanism 32 of the second support means 3 is raised. The transport rollers 15 are arranged at intervals in a direction perpendicular to the transport direction, and the support pins 31 are moved up and down in the space between the transport rollers 15 by the lifting mechanism 32. Therefore, as the elevating mechanism 32 is raised, the support pin 31 directly contacts the lower surface of the product sheet glass Ga from between the transport rollers 15. Further, the product plate glass Ga on the transport roller 15 is lifted by the support pins 31 by the ascent of the lifting mechanism 32, and is transferred from the transport rollers 15 to the support pins 31.

  Next, after raising the raising / lowering mechanism 32 further from the state shown by the one-dot chain line in FIG. 2, as shown in FIG. 3, each support arm 21 of the first support means 2 is advanced to the center side. Thereafter, when the elevating mechanism 32 is lowered in a state where the support arm 21 is advanced to the center side and stopped, the support pin 31 is lowered through the space between the support arms 21 (see FIG. 1). In this process, as shown in FIG. 4, the product sheet glass Ga supported by the support pins 31 is transferred to the support arm 21, and the lower surfaces of the two sides orthogonal to the transport direction are directly from below by the plurality of support rollers 22. Supported. As a result, the product plate glass Ga that has been supported flat by the support pins 31 is supported by the support roller 22 of the support arm 21 in a state of being bent downward in a convex shape. Since each support arm 21 is stopped in a state where the support arm 21 has advanced to the center side, the product sheet glass Ga supported by the support roller 22 stops while maintaining a bent state. Here, a support surface formed by the support rollers 22 arranged on the support arm 21 (a plane passing through contact points with the support plate glass Gb of the plurality of support rollers 22) is a convex lower end portion on the lower surface of the product plate glass Ga. Inclined downward toward X. The inclination angle of the support surface of the support roller 22 with respect to the horizontal plane is, for example, 5 ° to 15 °.

  After a series of operations for flexing the product sheet glass Ga in a convex manner in this way is completed, the support pin 31 is lowered below the transport roller 15 by the lifting mechanism 32 as shown in FIG. The support plate glass Gb is conveyed by the roller 15 to the lamination zone WS.

  As with the product plate glass Ga, the support plate glass Gb is transferred from the transport roller 15 to the support pins 31 as the lifting mechanism 32 is lifted. Thereafter, when the elevating mechanism 32 is further raised, as shown in FIG. 5, the upper surface of the support plate glass Gb supported by the support pins 31 is directly on the lower end portion X of the lower surface of the product plate glass Ga supported by the support roller 22. Contact. That is, the product plate glass Ga that is stationary is picked up by the support plate glass Gb rising, so that the two plate glasses Ga and Gb come into contact with each other and are in close contact with each other. Thus, when making both plate glass Ga and Gb contact initially, in order to prevent the shift | offset | difference of both plate glass Ga and Gb, it is preferable to make the raising speed of the raising / lowering mechanism 32 (support plate glass Gb) relatively slow. . For example, the normal ascending speed of the elevating mechanism 32 is 8 to 12 mm / s, and the ascending speed immediately before (or just after) the two glass sheets Ga and Gb are first contacted is 2 to 4 mm / s.

  In this embodiment, as shown in FIG. 6A, after the upper surface of the support plate glass Gb is in direct contact with the lower end portion X of the lower surface of the product plate glass Ga, the lifting mechanism 32 is further raised by a predetermined amount. Thereby, as shown in FIG.6 (b), the periphery of the lower end part X of the lower surface of the product plate glass Ga which was still in the state bent in the convex shape is lifted by the upper surface of the support plate glass Gb. Therefore, the periphery of the lower end portion X of the product plate glass Ga is deformed following the upper surface of the support plate glass Gb, and the contact area Y between the product plate glass Ga and the support plate glass Gb expands from a linear region parallel to the transport direction to a rectangular region. To do. As a result, the adhesion between the two glass plates Ga and Gb is improved, and a shift between the two glass plates Ga and Gb hardly occurs. Here, in the state of FIG. 6B, the rising width ΔD of the upper surface of the support plate glass Gb is, for example, 5 mm to 7 mm. Moreover, the width of the contact region Y that has become a rectangular region is, for example, 10 mm to 20 mm.

  From the state of FIG. 6 (b), the support arm 21 is gradually retracted to the two opposite sides of the product sheet glass Ga, and is pulled out from the lower surface of the product sheet glass Ga. The contact area Y between Ga and the supporting plate glass Gb expands on both sides. At this time, the product plate glass Ga is automatically guided to the support plate glass Gb side by its own weight while sliding down on the support roller 22. The support roller 22 may be driven and rotated, but may be driven and rotated as the support plate glass Gb moves.

  Finally, as shown in FIG. 8, the support arm 21 is completely pulled out from the lower surface of the product plate glass Ga to produce a laminate G in which the flat product plate glass Ga is laminated on the flat support plate glass Gb. can do. The laminated body G manufactured in this way is transferred to the transport roller 15 from the support pin 31 and transported downstream by lowering the lifting mechanism 32.

  And the laminated body G which laminated | stacked product plate glass Ga on support plate glass Gb can be manufactured sequentially by repeating the above operation | movement. The laminate G manufactured in this way is transported to the next step outside the figure by the fourth transport line 14 shown in FIG.

  If it carries out as mentioned above, since the support plate glass Gb will pick up the product plate glass Ga accompanying a raise, it will not be necessary to move the product plate glass Ga whose posture tends to become unstable due to bending. As a result, the lower end X of the lower surface of the product plate glass Ga and the upper surface of the support plate glass Gb are accurately in contact with each other at a predetermined position, and are in close contact with each other. In this state, when the support arm 21 is pulled out and the convex deformation of the product plate glass Ga is gradually released, the adhesion force due to the contact region Y formed first between the product plate glass Ga and the support plate glass Gb is maintained. However, since the contact area Y of both plate glasses Ga and Gb expands to the two sides facing the product plate glass Ga, it is difficult for air to enter between the product plate glass Ga and the support plate glass Gb. Therefore, it is possible to stack the product plate glass Ga in a state where the product plate glass Ga is correctly positioned on the support plate glass Gb without touching the upper surface as an effective surface of the product plate glass Ga.

  In addition, this invention is not limited to said embodiment, It can implement with a various form.

  In the above-described embodiment, the case where the first support means 2 supports the product sheet glass Ga with the support roller 22 provided on the support arm 21 has been described. However, the support arm 21 is a material with good sliding property such as a low friction material. In this case, the support roller 22 may be omitted, and the product sheet glass Ga may be directly supported by the support arm 21.

  In the above-described embodiment, the case where the second support means 3 supports the product plate glass Ga or the support plate glass Gb with the support pins 31 by point contact is described. However, the product plate glass Ga or the support plate glass Gb is supported by surface contact. May be.

  You may make it further perform manufacturing related processes, such as heating, pressurization, pressure reduction, etc. to the laminated body G which laminated | stacked the product plate glass Ga on the support plate glass Gb.

DESCRIPTION OF SYMBOLS 1 Conveyance line 15 Conveyance roller 2 1st support means 21 Support arm 22 Support roller 3 2nd support means 31 Support pin 32 Lifting mechanism Ga Product plate glass Gb Support plate glass WS Lamination zone X Lower end Y on product plate glass lower surface Y Product plate glass and Contact area of support plate glass

Claims (10)

A method of laminating the product plate glass on the support plate glass without touching the upper surface of the product plate glass,
In the state where the two opposite sides of the product plate glass are supported from the lower surface side and the product plate glass is bent and convexly lowered, the flat support plate glass is raised, and the lower surface of the product plate glass After contacting the lower end of
By gradually releasing the convex bending of the product plate glass, the contact area between the support plate glass and the product plate glass is expanded from the lower end of the product plate glass to the two opposite sides. A method for laminating plate glass.   2. The method for laminating plate glass according to claim 1, wherein the support plate glass stops rising at the position after the lower end of the product plate glass is lifted by a predetermined amount.   3. The sheet glass lamination according to claim 1, wherein lower surfaces of two opposite sides of the product sheet glass are respectively supported by a plurality of support rollers rotatable around an axis parallel to the two opposite sides. Method.   The method for laminating plate glass according to claim 3, wherein a support surface formed by the plurality of support rollers is inclined downward toward the lower end portion of the product plate glass. In a state where the product plate glass is supported in a flat shape by a plurality of support pins, after inserting a fork-like support body from the gaps of the plurality of support pins on each lower surface side of the two opposite sides of the product plate glass, The plurality of support pins are lowered relative to the support, and the product plate glass is transferred from the plurality of support pins to the support.
The said support body is pulled out from the lower surface of 2 sides which the said product plate glass opposes, when releasing the convex-shaped bending of the said product plate glass gradually, The any one of Claims 1-4 characterized by the above-mentioned. Lamination method of plate glass.   The said product plate glass is 1000 mm or less in one side, Comprising: Thickness is 0.7 mm or less, The lamination | stacking method of the plate glass of any one of Claims 1-5 characterized by the above-mentioned. An apparatus for laminating the product plate glass on the support plate glass without touching the upper surface of the product plate glass,
First supporting means for supporting the two opposite sides of the product sheet glass from the lower surface side so that the product sheet glass bends in a convex shape downward;
Second support means for supporting the support plate glass from the lower surface side so that the support plate glass is flat.
With the product plate glass supported by the first support means stationary, the support plate glass supported by the second support means is raised and brought into contact with the lower end of the lower surface of the product plate glass rear,
By gradually pulling out the first support means from the lower surface of the product plate glass, the contact area between the support plate glass and the product plate glass is expanded from the lower end portion of the product plate glass to the two opposite sides. A sheet glass laminating apparatus characterized by the above.   The said 1st support means each supports the lower surface of 2 sides which the said product plate glass opposes with the support roller which can rotate to the surroundings of the axis | shaft parallel to the 2 sides which oppose, respectively. The glass sheet laminating apparatus according to claim 1.   The plate glass laminating device according to claim 8, wherein a support surface formed by the plurality of support rollers is inclined downward toward the lower end side of the product plate glass. While further comprising a plurality of support pins that can be raised and lowered while supporting the product plate glass in a flat shape,
The said 1st support means is equipped with the fork-like support body which can move back and forth to each lower surface side of the two sides which the said product plate glass opposes from the clearance gap between these support pins. The laminating apparatus of the plate glass of any one of 7-9.

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