WO1998022400A1 - Procede et appareil permettant de cintrer une plaque de verre - Google Patents

Procede et appareil permettant de cintrer une plaque de verre Download PDF

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Publication number
WO1998022400A1
WO1998022400A1 PCT/JP1997/004236 JP9704236W WO9822400A1 WO 1998022400 A1 WO1998022400 A1 WO 1998022400A1 JP 9704236 W JP9704236 W JP 9704236W WO 9822400 A1 WO9822400 A1 WO 9822400A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
glass sheet
glass plate
rollers
bending
Prior art date
Application number
PCT/JP1997/004236
Other languages
English (en)
Japanese (ja)
Inventor
Kohei Yoshino
Kenji Maeda
Tsuyoshi Kawaguchi
Masahiro Tsuchiya
Tomio Kajikawa
Original Assignee
Asahi Glass Company Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Company Ltd. filed Critical Asahi Glass Company Ltd.
Publication of WO1998022400A1 publication Critical patent/WO1998022400A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/0422—Tempering or quenching glass products using gas for flat or bent glass sheets starting in an horizontal position and ending in a non-horizontal position
    • C03B27/0426—Tempering or quenching glass products using gas for flat or bent glass sheets starting in an horizontal position and ending in a non-horizontal position for bent glass sheets
    • C03B27/0431—Tempering or quenching glass products using gas for flat or bent glass sheets starting in an horizontal position and ending in a non-horizontal position for bent glass sheets the quench unit being adapted to the bend of the sheet
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/033—Re-forming glass sheets by bending by press-bending between shaping moulds in a continuous way, e.g. roll forming, or press-roll bending
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/0422—Tempering or quenching glass products using gas for flat or bent glass sheets starting in an horizontal position and ending in a non-horizontal position
    • C03B27/0426—Tempering or quenching glass products using gas for flat or bent glass sheets starting in an horizontal position and ending in a non-horizontal position for bent glass sheets

Definitions

  • the present invention relates to a method and an apparatus for bending a glass sheet for transportation equipment such as automobiles, ships, railroads, and aircrafts, or for building and other various uses.
  • a method is known in which a glass sheet heated near the softening point in a heating furnace is conveyed by a plurality of curved rollers to bend the glass sheet (for example, US Pat. No. 4,123,246). No.). In this case, the softened glass sheet hangs down due to its own weight, and is bent to follow the curvature of the roller.
  • a method is known in which a glass sheet heated to near a softening point in a heating path is conveyed by a plurality of rollers inclined in a conveying direction so that the conveying path is curved, thereby bending the glass sheet. (For example, U.S. Pat. No. 4,820,327). In this case, the softened glass sheet hangs down due to its own weight, and is bent to follow the curvature of the transport path.
  • the glass plate is not sufficiently heated because the glass plate is bent by the conveying path formed by the roller and the curved roller after passing through the heating furnace. If, when I'll raise the temperature of the glass plate c therefor can not follow the curvature of the conveying path Ya rollers, now it will remain conveying traces such rollers to the glass plate, causing poor appearance and optical distortion would. Furthermore, since the bending is performed by transporting the glass plate on rollers, a sufficient transport distance is required so as to follow the curvature of the transport path and the rollers. Therefore, even if the temperature of the glass plate was raised, the heat of the glass plate was taken away by the rollers, and the required temperature of the glass plate could not be obtained. In addition, there is a problem that the molding apparatus becomes large because a sufficient transport distance is required.
  • the glass sheet is formed so as to have a curvature in the conveying direction of the glass sheet.
  • the upstream edge and the downstream edge in the transport direction of the glass sheet become a substantial supporting portion.
  • the glass sheet is bent so that the central area thereof falls downward.
  • bending near the supporting portion is not sufficiently performed, and a desired curvature cannot be given to the upstream edge region and the downstream edge region in the transport direction.
  • the glass sheet is formed so as to have a curvature in a direction perpendicular to the conveying direction of the glass sheet.
  • the glass sheet is bent and formed such that an edge parallel to the transport direction of the glass sheet becomes a substantial supporting portion and a central region of the glass sheet falls downward. For this reason, the bending in the vicinity of the supporting portion (edge) is not sufficiently performed, and a desired curvature cannot be given to the edge regions on both sides parallel to the transport direction.
  • the glass plate is further sandwiched between upper and lower rollers in the method described in the above-mentioned U.S. Pat. No. 4,123,246.
  • the direction in which the glass sheet is transported is in the above, different curvatures could not be given depending on the parts: for example, in the case of lya glass for automobiles, the vicinity of the left and right sides has a large curvature (small radius of curvature), and the center has a small curvature ( A glass plate having a large radius of curvature may be used. In this case, it is possible to obtain a glass plate having a large curvature near the left and right sides by increasing the curvature of the end of the roller and transporting the glass plate so that the left and right sides of the lya glass face the transport direction. There is.
  • An object of the present invention is to solve the above-mentioned disadvantages of the related art, and to provide a novel method and apparatus for bending a glass plate, which have not been known in the past.
  • the present invention has been made in view of the above problems, and heats a glass plate to a molding temperature while being transported in a substantially horizontal direction by a first transport means into a heating furnace, and is provided downstream of the heating furnace.
  • the forming means includes a roller group in which a plurality of rollers are arranged above and below a conveying surface on which the glass sheet is conveyed. A glass plate is sandwiched between them to bend and formed, and the glass plate is transported while moving the positions of the plurality of rollers in the transport direction so as to change the region where the glass plate is sandwiched by the upper and lower rollers, and the glass plate is moved to a predetermined position. It is intended to provide a method for bending a glass sheet, characterized in that the glass sheet is bent to the above curvature.
  • the present invention provides a heating stage having a heating furnace for heating a glass plate to a molding temperature, and a first transfer means for transferring the glass plate in a substantially horizontal direction into the heating furnace; and a heating stage downstream of the heating furnace.
  • a roller group movably arranged in the conveying direction, a moving unit for moving the plurality of rollers in the conveying direction of the glass sheet, The glass plate conveyed from the glass is sandwiched by the plurality of rollers from above and below to bend to a predetermined curvature, and the region where the glass plate is sandwiched by the upper and lower rollers is changed to change the bendable region of the glass plate.
  • a control means for controlling the moving means so as to move the positions of a plurality of rollers in the conveying direction.
  • the both edge regions can be bent to a predetermined curvature.
  • the upper and lower rollers it is possible to change the curvature according to the portion of the glass sheet in the transport direction, and to reduce transport failure due to the glass sheet having a complicated bent shape. it can.
  • the lower roller is at least two rollers: a downstream roller in the transport direction of the glass plate and an upstream roller in the transport direction, and the glass plate is provided with the downstream roller and the downstream roller.
  • the upper roller is disposed between the downstream roller and the upstream roller while being supported by the upstream roller, and is brought into contact with the glass plate from above the glass plate, and is supported by the downstream roller of the glass plate.
  • the area between the part and the part supported by the upstream roller is bent so as to have a downward convex shape, and the downstream roller and the upstream roller are moved in the transport direction to transport the glass sheet in the transport direction.
  • the upper roller is moved in the transport direction while changing the area between the part supported by the downstream roller and the part supported by the upstream roller of the glass plate to form the glass to be bent.
  • a predetermined curvature can be given to the glass plate, and can be short zone the zone of bending.
  • the glass sheet is rapidly cooled by cooling means after the bending of the glass sheet, so that a strengthened bent glass sheet can be obtained.
  • cooling means for rapidly cooling and strengthening the glass sheet is provided above the first conveying means, and a path is provided which substantially matches the curved shape of the glass sheet in the conveying direction. It is possible to move between the first conveying means and the cooling means so as to form a path which substantially matches the curved shape in the conveying direction. Therefore, it is possible to smoothly convey the glass plate and shorten the zone for bending.
  • FIG. 1 is a schematic cross-sectional view showing an example of the entire configuration of a glass sheet bending strengthening step including a glass sheet bending apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of an essential part showing an example of a forming means in the present invention.
  • FIG. 3 is a perspective view showing an example of the overall configuration of a glass sheet bending strengthening step including the glass sheet bending apparatus according to the second embodiment of the present invention.
  • FIG. 4 is a side view of the glass sheet bending apparatus shown in FIG.
  • FIG. 5 is a block diagram showing a control system of the glass sheet bending apparatus shown in FIG.
  • FIG. 6 is a structural diagram of a rotary moving device of each roller which is a forming device.
  • FIG. 1 is a schematic cross-sectional view showing an example of the entire configuration of a glass sheet bending strengthening step including a glass sheet bending apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a
  • FIG. 7 is an operation explanatory view of the upper roller, the first lower roller, and the second lower roller.
  • FIG. 8 is an explanatory view of the operation of the upper roller and the first lower roller for bending the downstream end region of the glass plate.
  • FIG. 9 is an explanatory view of the operation of the upper roller and the second lower roller for bending the upstream end region of the glass plate.
  • FIG. 1 is a schematic cross-sectional view showing the entire configuration of a glass sheet bending strengthening step including a glass sheet bending apparatus according to a first embodiment of the present invention.
  • the glass plate 10 is conveyed into the heating furnace 1 in the heating stage ST1, and is heated to the molding temperature. At this time, the glass plate 10 is transferred by the first transfer means 11 in the heating furnace 1.
  • a molding stage ST2 Downstream of the heating furnace, a molding stage ST2 is provided.
  • a plurality of curved rollers 21 (first forming means-second transferring means) for bending and forming the glass plate 10 while being transferred are arranged so as to be inclined downward in the transfer direction.
  • the glass plate 10 is preliminarily bent by being conveyed onto the curved roller 21, and is sandwiched from above and below by the curved rollers 22 and 22 ′, so that the glass plate 10 is provided by an inclined arrangement of a plurality of curved rollers 21.
  • the glass plate 10 thus bent is conveyed to the cooling stage ST3, and is cooled by cooling air blown from cooling air blowing devices arranged above and below the transfer surface. At this time, it is preferable that the glass sheet is rapidly cooled and strengthened by heat treatment by appropriately selecting a cooling capacity according to the thickness of the glass sheet.
  • FIG. 2 is a schematic cross-sectional view of an essential part showing an example of the forming means in the present invention.
  • the plurality of curved rollers 22 and 22 ' are arranged above and below a transfer surface on which the glass plate 10 is transferred, and sandwich the glass plate 10 when the glass plate 10 is transferred.
  • the curved rollers 22 and 22 ′ are moved in the horizontal component direction (X-axis direction) and the vertical direction (Z-axis direction) in the transport direction to change the curvature of the glass plate 10 in the transport direction depending on the region. Direction).
  • the curved roller 22 becomes the glass plate 10. Is changed to a position lower than the conveyance surface so as to press.
  • the position of the curved roller 2 2 ′ is changed further to the left of the curved roller 2 2 ′ located on the left side in the figure, and the position of the curved roller 22 2 ′ on the right side is further shifted to the right side (FIG. 2 (a ); From the position of the dotted line to the position of the solid line).
  • the curving rollers 22 move their positions upward, and the curving rollers 22 'move to their original positions, respectively (FIG. 2 (b): the position indicated by the dotted line). From the position of the solid line).
  • a glass plate having a large curvature (small radius of curvature) on the downstream side in the transport direction of the glass plate 10 and a small curvature (large radius of curvature) at the center can be obtained.
  • the bending of the glass sheet in this example is basically performed while supporting the glass sheet using two rollers, the downstream roller in the transport direction of the glass sheet and the upstream roller in the transport direction.
  • the upper roller is brought into contact with the upper surface of the glass plate of the glass plate between the side roller and the upstream roller to bend the glass plate. That is, the glass plate is supported upward by the two lower rollers, and a downward pressing force is applied to the glass plate by the upper opening roller. The area between the roller and the part supported by the roller is bent so as to be convex downward. Then, the upper roller is transported while the glass plate is transported in the transport direction by moving the downstream roller and the upstream roller in the transport direction. Direction, changing the area between the part supported by the downstream roller and the part supported by the upstream roller of the glass sheet, thereby sequentially bending the entire area of the glass sheet to be bent. Is what you do.
  • FIG. 2 only one curved roller 22 and two curved rollers 22 ′ are shown, but the number is appropriately determined according to the bent shape of the glass sheet to be obtained.
  • the curvature is changed according to the portion of the glass plate as in this example, although not shown, it is preferable that approximately three upper and lower glass plates be obtained in order to obtain a desired shape of the glass plate.
  • the diameters of the curved rollers are shown large for the sake of convenience, but the diameters of these curved rollers are not limited to the characteristics shown in the drawings.
  • the diameters of the upper and lower curved rollers may be the same or different. The size of the diameter is determined so that each roller does not hinder the movement of the other rollers.
  • the glass plate is supported upward by the two lower rollers, the downward pressure is applied to the glass plate by the upper roller, and the portion supported by the downstream rollers of the glass plate and the upstream.
  • the diameter of the upper roller is preferably larger than the diameter of the lower roller.
  • these curved rollers 22 and 22 ′ have a variable curvature (curvature of the curved roller itself) provided in a direction perpendicular to the transport direction.
  • a variable curvature curvature of the curved roller itself
  • the movement of the curved roller for changing the curvature according to the part in the transport direction and the change of the curvature of the curved roller itself provided as necessary are performed based on the shape data of the glass plate to be obtained.
  • the shape of a glass sheet for a vehicle window is prepared as CAD data.
  • the curved rollers 21, 22, and 22 'each have a downwardly convex curvature. Therefore, the glass sheet can be transported onto the curved roller 21 that is the pre-bending molding. As a result, the glass sheet is bent by its own weight so that the center of the glass sheet falls downward.
  • these curved rollers may have an upward convex shape, contrary to the above example.
  • the glass plate is bent by its own weight as the peripheral portion of the glass plate hangs down.
  • the latter may cause optical distortion due to roller conveyance in the center part of the glass sheet.
  • the rollers are convex upward, in the above-described pre-bending molding, it may be easier to obtain a desired bent shape of the glass plate by arranging the plurality of curved rollers 21 so as to be inclined upward. Many.
  • the curved roller be curved in a downwardly convex shape.
  • the glass sheet in the present invention is heated to about 6 ° C. to 700 ° C. in a heating furnace.
  • the glass sheet may be conveyed in the heating furnace by a roller, or may be conveyed while the glass sheet is levitated by heated air blown from below the heating furnace. From the point that the glass plate is transported by rollers in the next stage (forming stage), it is preferable that the glass plates be transported by rollers even in the heating furnace.
  • the first molding means of the above example is provided as needed.
  • the glass sheet heated by the heating furnace can be passed through the second forming means without passing through the first forming means. It may be bent.
  • the glass sheet can be bent by the second forming means before the temperature of the heated glass sheet is cooled, which is preferable.
  • the glass sheet is first preliminarily bent to some extent by being conveyed on a curved roller as a second conveying means as the first forming means, and then the glass sheet is vertically moved by the second forming means.
  • a desired curvature can be given to a predetermined portion of the glass plate.
  • the curvature of the plurality of curved rollers as the second forming means is adjusted according to the portion of the glass sheet sandwiched when one glass sheet passes between the plurality of curved rollers. It is preferable that the curvature of each of the glass plates is variable in the first direction. This is because the curvature in the direction perpendicular to the direction can be made desired depending on the region.
  • the positions of the plurality of curved rollers and the respective curvatures are made variable so as to provide a desired curvature in the glass sheet conveyance direction and the direction perpendicular to the conveyance direction.
  • FIG. 3 is a perspective view showing an entire configuration of a glass sheet bending strengthening step including a glass sheet bending apparatus 30 according to a second embodiment of the present invention
  • FIG. 4 is a side view thereof.
  • the glass sheet bending apparatus 30 is provided with a glass sheet 34 having a unidirectional curvature such as a door glass of an automobile, which can be bent without performing the above-described preliminary bending. It is intended for bending. Therefore, the three rollers for molding applied by the molding apparatus 30, namely, the upper opening roller 36, the first lower roller 38, and the second lower roller 40, are not straight rollers but straight rollers.
  • the upper opening roller 36, the first lower roller 38, and the second lower roller 40 are not straight rollers but straight rollers.
  • the pre-bending is not performed by the inclined curved rollers.
  • the rollers 36, 38, 40 will be described later.
  • the molding apparatus 30 includes a heating furnace 44 having a first transfer device 42, three molding rollers 36, from the upstream to the downstream of the molding process. 38, 40, 2nd conveying device 46, cold air blowing nozzle for primary cooling 32, 32, cold air blowing nozzle for secondary cooling 48, 48, slide transfer device 50 (See FIG. 5), a rotary transfer device 52, and a third transfer device 54 are arranged in this order.
  • the forming process of the glass plate 34 in each of the above-described apparatuses will be described.
  • the glass plate 34 before bending is transferred into the heating furnace 44 by the first transfer device 42 to reach the forming temperature. Heated. Then, the heated glass plate 34 exits the heating furnace 44. Immediately thereafter, the sheet is sandwiched by the three rollers 36, 38, and 40 to be bent to a desired one-way curvature.
  • the bending of the glass sheet in this example is basically performed in the same manner as in the embodiment shown in FIGS. 1 and 2, and the roller (first lower roller 38) on the downstream side in the transport direction and the upstream side on the transport direction.
  • the glass of the glass plate 34 between the first lower roller 38 and the second lower roller 40 while supporting the glass plate 34 using two rollers with the roller (second lower roller 40).
  • the upper roller 36 is brought into contact with the upper surface of the plate to bend the glass plate 34. That is, the glass plate 34 is supported upward by the two lower rollers 38, 40, and a downward pressing force is applied to the glass plate 36 by the upper roller 36, whereby the glass plate 3 is pressed.
  • the bent glass plate 34 is raised and conveyed by the second transfer device 46 arranged with the same curvature as that of the glass plate 34, and is used for primary cooling arranged on both sides of the glass plate 34.
  • Cooling blast is enhanced by the cooling air blown out from the cold air blowing nozzles 32, 32, ....
  • the air pressure from the primary cooling cold air blowing nozzles 32, 32 arranged on the upper surface side of the glass plate 34 is changed to the primary cooling cold air blowing nozzle arranged on the lower surface side.
  • the air pressure from 32 ′, 32 ′,... Is sufficiently higher, and the glass plate 34 is pressed against the second transfer device 46 by the pressure difference to be transferred.
  • the glass plate 34 is transported upward without falling down.
  • the glass plate 34 which has passed through the primary cooling cold air blowing nozzles 32, 32, ..., is arranged vertically one above the other while being continuously ascended and transported by the second transport device 46. It is cooled by the cooling air from the cooling air blowing nozzles 48, 48 ... for secondary cooling.
  • the air pressure from the secondary cooling cold air blowing nozzles 48, 48, located on the left side of the glass plate 34 is applied to the secondary cooling cold air located on the right side.
  • the air pressure from the spray nozzles 49, 49,... Is sufficiently higher than the air pressure, and the glass plate 34 is pressed against the second transfer device 46 by the pressure difference to transfer the glass.
  • the glass plate 34 is transported upward without sliding down. Further, the cold air blowing nozzle 48 for secondary cooling is cooled to such an extent that the glass plate 34 is rapidly cooled and strengthened by the primary cooling so that the shape does not change, and the glass plate 34 is not cooled by air cooling. Therefore, the arrangement interval is set wider than that of the cooling air blowing nozzles 32, 32, ... for primary cooling.
  • the glass plate 34 transferred to the uppermost position by the second transfer device 46 is transferred to the rotary transfer device 52 of FIG. 3 by the slide transfer device 50 (not shown in FIGS. 3 and 4) of FIG. It will be transferred.
  • the third transfer device 54 is rotated by the rotation of the rotary transfer device 52 indicated by arrows in the drawing. Placed on top. Then, the glass plate 34 is transferred to the inspection step by the third transfer device 54.
  • the flow of the glass plate 34 in the forming apparatus 30 shown in FIGS. 3 and 4 has been described above.
  • the cooling air blowing nozzle 32 for primary cooling, the second transport device 46, the cooling air blowing nozzles 48, 49 for secondary cooling, and the slide transfer device 50 are provided. It is assembled as a unit.
  • the cooling air blowing nozzle 32 for primary cooling, the second transport device 46, and the cooling air blowing nozzles 48, 49 for secondary cooling are connected to each other flexibly.
  • the unit thus constructed is rotatably supported at its lower part by a tower 56 installed at the exit of the heating furnace 44, and its upper part is adjusted by a beam 58 of the tower 56. It is connected via a bar 60.
  • the curvature of the second transfer device 46 can be changed. Thereby, the curvature of the second transfer device 46 can be adjusted to the curvature that matches the type of the glass plate 34.
  • FIG. 5 is a block diagram showing a control system of the molding apparatus 30.
  • the control device 72 shown in the figure is a control device that performs overall control of the entire device.
  • the first air supply device 74 in the figure is a device for supplying cooling air to the cooling air blowing nozzle 32 for primary cooling, and the supply amount is controlled by the control device 72.
  • the second air supply device 76 is This is a device that blows cooling air to the cooling air blowing nozzles 48 and 49 for the next cooling, and the supply amount is controlled by the control device 72.
  • the upper roller rotation / movement device 80, the first lower roller rotation / movement device 82, and the second lower roller rotation / movement device 84 are controlled based on the lath plate detection signal.
  • the sensor 78 is provided near the outlet of the heating furnace 44, but is not limited to this.
  • the upper roller rotating / moving device 80 has a rotary motor 86 (indicated by broken lines in the figure), a Z-axis drive motor 88, and an X-axis drive motor 90 as main components.
  • the X-axis drive motor 90 is fixed to a tower 56 shown in FIG. 4 with an output shaft (not shown) oriented horizontally, and a slider 92 shown in FIG. 6 is screwed on a screw rod (not shown) connected to the output shaft. Have been combined. Therefore, when the X-axis drive motor 90 is driven, the slider 92 slides horizontally (X-axis direction) by the action of the screw.
  • the Z-axis drive motor 88 is fixed to the lower surface of the slider 92.
  • An output shaft (not shown) of the Z-axis drive motor 88 is connected to a reduction mechanism (not shown) provided in a gear box 94, and a rod 96 is connected to an output end of the reduction mechanism. Therefore, when the Z-axis drive motor 88 is driven, the rod 96 moves up and down (in the Z-axis direction).
  • the rod 96 is guided by a guide cylinder 98 and moves up and down.
  • An upper roller 36 is rotatably connected to a lower end of the mouth 96 via a pin 99, and an output shaft (not shown) of the rotary motor 86 is connected to the pin 99. It has been. Therefore, the upper roller 36 is rotated by the rotation motor 86, vertically moved by the Z-axis drive motor 88, and horizontally moved by the X-axis drive motor 90.
  • the rotation speed of the upper roller 36 is controlled by the control device 7 so that no slip occurs due to the speed difference between the upper roller 36 and the glass plate 34 regardless of the position where the upper roller 36 is moved. Is controlled by two.
  • the first lower roller rotation / moving device 82 mainly includes a rotation motor 100 (shown by a broken line in the figure), a Z-axis drive motor 102, and an X-axis drive motor 104.
  • the X-axis drive motor 104 is fixed on the gantry 112 with the output shaft (not shown) oriented horizontally, and the slider 106 is screwed into a screw rod (not shown) connected to the output shaft. ing.
  • the slider 106 is supported on a gantry 112 so as to be able to slide horizontally. Therefore, when the X-axis drive motor 104 is driven, the slider 106 slides horizontally (X-axis direction) by the action of the screw.
  • the Z-axis drive motor 102 is fixed to the upper surface of the slider 106.
  • An output shaft (not shown) of the Z-axis drive motor 102 is connected to a reduction mechanism (not shown) provided in a gear box 108, and a rod 110 is connected to an output end of the reduction mechanism. I have. Therefore, when the Z-axis drive motor 102 is driven, the rod 110 moves up and down (Z-axis direction). The rod 110 is guided by the guide cylinder 112 and moves up and down.
  • a first lower roller 38 is rotatably connected to the upper end of the mouth 110 via a pin 113, and the output shaft of the rotary motor 100 is connected to the pin 113 (see FIG. (Not shown) are connected. Therefore, the first lower roller 38 is rotated by the rotary motor 100, vertically moved by the Z-axis drive motor 102, and horizontally moved by the X-axis drive motor 104. Note that the rotational speed of the first lower roller 38 does not cause a slip due to a speed difference between the first lower roller 38 and the glass plate 34 regardless of the position of the first lower roller 38. As described above, it is controlled by the control device 72.
  • the second lower roller rotating / moving device 84 has a rotary motor 114 (shown by a broken line in the drawing), a Z-axis drive motor 116, and an X-axis drive motor 118 as main components.
  • the X-axis drive motor 118 is fixed on the gantry 112 with its output shaft (not shown) oriented horizontally, and the slider 120 is screwed to a screw rod (not shown) connected to the output shaft. .
  • the slider 120 is supported on the gantry 112 so as to be able to slide horizontally. Therefore, when the X-axis drive motor 118 is driven, the slider 120 slides horizontally (X-axis direction) by the action of the screw.
  • the Z-axis drive motor 116 is fixed to the upper surface of the slider 120.
  • the output shaft (not shown) of the Z-axis drive motor 1 16 is connected to a reduction mechanism (not shown) provided in a gear box 122, and a port 1 24 is connected to an output end of the reduction mechanism.
  • a reduction mechanism not shown
  • a port 1 24 is connected to an output end of the reduction mechanism.
  • the rod 124 moves up and down (Z-axis direction).
  • the rod 124 is guided by the guide cylinder 126 and moves up and down.
  • a second lower roller 40 is rotatably connected to the upper end of the rod 124 via a pin 127.
  • the output shaft of the rotary motor 114 is connected to the pin 127 (not shown). ) Are linked.
  • the second lower roller 40 is rotated by the rotary motor 114, vertically moved by the Z-axis drive motor 116, and horizontally moved by the X-axis drive motor 118.
  • the rotational speed of the second lower roller 40 is such that the slip caused by the speed difference between the second lower roller 40 and the glass plate 34 does not matter where the second lower roller 40 is moved. It is controlled by the control device 72 so as not to occur.
  • the control of the rollers 36, 38, 40 by the control device 72 is performed, for example, by numerical control.
  • the bending shape of the glass plate 34 is converted into data by CAD data or the like.
  • the moving distance of each roller 36 to 40 in the X-axis direction and Z-axis direction is determined in advance according to the conveyance speed of the glass plate 34 and the position where the glass plate 34 is being conveyed. It is input to the control unit 72.
  • the upper roller 36 comes into contact with the predetermined portion of the glass plate 34 from the upper side in the transport direction of the upper roller 36, and the lower rollers 38, 40 are placed on the downstream side in the transport direction of the upper roller 36.
  • the upper and lower rollers 36, 38, and 40 can be moved to predetermined positions so as to support the plate 34 and bend a predetermined portion to a predetermined curvature.
  • the rotational speeds of the rollers 36, 38, 40 are further controlled as described above according to the transport speed of the glass plate 34 and the moving speeds of the rollers 36, 38, 40.
  • the upper roller 36 moves to the right at a low speed as shown in FIGS. 7 (B) and 7 (C), and the first lower roller 3 8 moves faster than that, increasing the span between the first lower roller 38 and the second lower roller 40,
  • the glass plate 3 4 passing through the center of the span is pressed by the upper roller 36.
  • the glass plate 34 is bent and formed to a predetermined curvature.
  • the second lower roller 40 supports the upper roller 36 while supporting the upstream edge region 34B as shown in FIG. 7 (E). Move beyond. Then, when the upstream side edge region 34B passes through the first lower roller 38, the upper roller 36, the first lower roller 38, and the second lower roller 40 are moved as shown in FIG. Return to the original position shown in Fig. 7 (A) and stop. Then, it stands by at that position until the next glass plate 34 is conveyed.
  • the above is the bending operation of one glass plate 34 by the upper roller 36, the first lower roller 38, and the second lower roller 40.
  • FIG. 8A shows a state immediately after the upstream edge region 34 A of the glass plate 34 is sandwiched between the upper roller 36 and the first lower roller 38.
  • the upper roller 36 moves in the conveying direction (arrow direction) at a speed slightly lower than the conveying speed of the glass plate 34, and in synchronization with this, the first lower roller 36 moves.
  • the roller 38 moves along a counterclockwise arc-shaped locus at a speed slightly higher than the transport speed of the glass plate 34.
  • the downstream edge region 34 A is formed to have a predetermined curvature by being made to follow the roller surface of the upper roller 36 by the first lower roller 38.
  • the molding device 30 of the present embodiment is compared with the conventional device, in the conventional device, since the downstream edge region becomes a substantial supporting portion, this region can be formed to a predetermined curvature. Although not possible, this is possible with the molding apparatus 30 of the present embodiment.
  • FIG. 8C shows the positional relationship between the upper roller 36 and the first lower roller 38 immediately after the completion of the bending at the downstream edge region 34A.
  • Upper roller 36 transports a small amount
  • the first lower roller 38 moves in the transport direction while supporting the downstream edge area 34 A by bending in the following direction.
  • the lower roller 38 supports the downstream edge region 34 A immediately after the bending, thereby preventing the downstream edge region 34 A from sagging due to its own weight.
  • the above is the bending operation of the downstream edge region 34 A by the upper roller 36 and the first lower roller 38.
  • FIG. 9A shows a state immediately before the downstream edge region 34 B of the glass plate 34 passes through the second lower roller 40. From this state, as shown in FIG. 9 (B), the second lower roller 40 moves diagonally upward and rightward in the figure at a speed slightly higher than the transport speed of the glass plate 34. As a result, the upstream side edge region 34 B is formed to have a predetermined curvature by being made to follow the roller surface of the upper roller 36 by the second lower roller 40.
  • FIG. 9 (C) shows the positional relationship between the upper roller 36 and the second lower roller 40 immediately after the formation of the upstream edge region 34A.
  • the second lower roller 40 moves in the transport direction while supporting the upstream edge region 34B.
  • the second lower roller 40 supports the upstream edge region 34 B immediately after the bending, thereby preventing the upstream edge region 34 B from sagging due to its own weight. ing.
  • the above is the bending operation of the upstream edge region 34B by the upper roller 36 and the second lower roller 40.
  • the forming apparatus 30 of the present embodiment achieves the bending forming in which the upstream edge area and the downstream edge area are given the same curvature as the other areas, which cannot be achieved by the conventional apparatus. it can.
  • the diameters of the upper and lower rollers can be determined as appropriate.
  • the curvature of the upper roller is determined according to the curvature of the glass plate to be obtained.
  • the diameter of the upper roller is larger than that of the lower roller.
  • the glass plate is supported upward by two lower rollers, and a downward pressing force is applied to the glass plate by the upper rollers.
  • the diameter of the upper roller is It is preferable to make the diameter larger than the diameter.
  • the shape of the upper and lower rollers in the molding device 30 may be a curved shape to give a curvature in a direction perpendicular to the glass plate transport direction.
  • the movement and pinching of the upper and lower rollers imparts a curvature in the glass sheet conveyance direction, and a curvature is applied in a direction perpendicular to the glass sheet conveyance direction so as to follow the curved shape of the roller.
  • a bent glass plate is obtained.
  • the position of the roller sandwiching the glass plate in the forming means can be moved, it is not necessary to raise the forming temperature of the glass plate more than necessary, so that the appearance defect of the glass plate can be reduced.
  • the forming zone can be made substantially as long as the length of the glass sheet in the transport direction, thereby suppressing heat radiation from the glass sheet. Can be. From this point, it is not necessary to raise the temperature of the glass sheet more than necessary.
  • both edge regions are brought into contact with the roller surface of the upper roller.
  • the upper roller and the lower roller By moving the upper roller and the lower roller relatively so that they are copied by the lower roller, it is possible to bend both edge regions to a predetermined curvature, which has been conventionally difficult.
  • the upper and lower rollers curved rollers it is possible to change the curvature according to the portion of the glass plate in the transport direction. In addition, it is possible to reduce defective conveyance due to a glass plate having a complicated bent shape.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Un procédé de cintrage d'une plaque de verre comprend les étapes suivantes: on utilise un dispositif de formage constitué de groupes de cylindres dans lesquels plusieurs cylindres sont disposés au-dessus et au-dessous d'un plan de transfert sur lequel est transférée une plaque de verre pour former par cintrage la plaque de verre intercalée entre les cylindres supérieurs et inférieurs; on transfère la plaque de verre alors que dans le même temps on déplace les positions des cylindres dans le sens du transfert de manière à modifier une zone où la plaque de verre se trouve intercalée entre les cylindres supérieurs et inférieurs; puis on cintre la plaque de verre avec une courbure prédéterminée. Un appareil associé à ce procédé est également présenté.
PCT/JP1997/004236 1996-11-21 1997-11-20 Procede et appareil permettant de cintrer une plaque de verre WO1998022400A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8/326204 1996-11-21
JP32620496 1996-11-21

Publications (1)

Publication Number Publication Date
WO1998022400A1 true WO1998022400A1 (fr) 1998-05-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1997/004236 WO1998022400A1 (fr) 1996-11-21 1997-11-20 Procede et appareil permettant de cintrer une plaque de verre

Country Status (1)

Country Link
WO (1) WO1998022400A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540539B1 (fr) * 1970-03-10 1980-10-18
JPH0470093B2 (fr) * 1988-08-29 1992-11-10 Kumataro Matsunaga
JPH06182449A (ja) * 1992-12-18 1994-07-05 Fuji Car Mfg Co Ltd 曲げロール機
JPH07291646A (ja) * 1994-04-26 1995-11-07 Tamglass Eng Oy 板ガラス用の曲げ及び加熱装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5540539B1 (fr) * 1970-03-10 1980-10-18
JPH0470093B2 (fr) * 1988-08-29 1992-11-10 Kumataro Matsunaga
JPH06182449A (ja) * 1992-12-18 1994-07-05 Fuji Car Mfg Co Ltd 曲げロール機
JPH07291646A (ja) * 1994-04-26 1995-11-07 Tamglass Eng Oy 板ガラス用の曲げ及び加熱装置

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