JP2000128344A - Holding carrier for thin plate and holding carrying method for thin plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting device for a thin plate and a lifting method for the thin plate to lift the thin plate such as a glass pane. SOLUTION: It is possible to shorten working time as it is possible to speedily lift a glass pane 2 by lifting the circumference of the glass pane 2 by a holding claw 17 of a holding claw member 13 by sequentially driving cylinder devices 6 for elevation on four corner parts by shifting timing even when the glasses pane 2 is in a water wet state and is closely attached to a level block 16 and forcibly driving wash water away to the central side of the glass pane 2 by spraying gas 20 for peeling between the glass pane 2 and the level block 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate lifting device and a thin plate lifting method for lifting a thin plate such as a glass plate.

[0002]

2. Description of the Related Art In recent years, glass plates have been used in various fields such as liquid crystal panel substrates, color filters, and PDPs (plasma display panels).

The surface of a glass plate used for the above applications is polished. And when polishing,
Generally, a water-soluble polishing agent is used, and a cleaning operation with water is performed to maintain the cleanliness of the glass surface.

[0004] By the way, the glass plate after polishing work is
It is necessary to lift and move the platen to a predetermined place.
Since the glass plate placed on 6 is in close contact with the mounting surface of the platen 16, it is difficult to lift the glass plate so as not to damage the glass plate. Therefore, the glass plate in the wet state is placed on the platen 16.
At present, the work of lifting and moving from an expert depends on skilled personnel.

[0005] However, in recent years, the size of glass plates has been gradually increased, so that it is difficult and difficult to lift even a skilled person. In order to solve this problem, a technique as disclosed in Japanese Patent Laid-Open No. Hei 10-225888 has been proposed. This involves providing a plurality of holding claws for supporting the lower surface of the corner of the glass plate, supporting the lower surface of the corner of the glass plate with these holding claws, and raising the holding claws at a shifted timing to wet the glass plate with water. The surface is lifted while the area of the surface is gradually reduced.

[0006]

By the way, when the corners and peripheral portions of the glass plate are supported and raised by the holding claws, the water interposed between the glass plate and the mounting surface escapes toward the center.
Therefore, if the glass plate is raised at a speed higher than the moving speed of the water, the force of contacting the glass plate with the water greatly acts, and the glass plate is damaged.

Therefore, in order to lift the glass plate without damaging it, the glass plate can only be raised at a speed corresponding to the speed at which the water escapes, and the working time cannot be reduced.

Accordingly, an object of the present invention is to provide a thin plate lifting apparatus and a lifting method which can solve the above-mentioned problems.

[0009]

Means for solving the problems according to the present invention is to provide a transfer table according to the size of a thin plate for lifting a thin plate placed on a surface plate and transferring it to a predetermined place. Is provided movably above the thin plate, and a lifting device provided with a plurality of holding members for holding a peripheral portion of the thin plate at a predetermined position is arranged on the transfer table, and the thin plate is held on the transfer table by the holding member. A spraying device having a spraying nozzle for spraying a peeling gas from the side into a gap between the surface plate and the thin plate when lifted from the surface plate is provided.

[0010] In the above structure, when the thin plate placed on the surface plate is lifted, a holding member provided on a transfer table movably disposed above the surface plate, a predetermined portion of a peripheral portion of the thin plate mounted on the surface plate is provided. Hold the position and lift it up, and peel off the gas from the spray nozzle provided on the transfer table into the gap between the platen and the sheet from the side, lift up the sheet placed on the platen and Transport to the location.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a glass sheet holding and conveying apparatus according to an embodiment of the present invention.

As shown in FIG. 1, a thin plate holding and transferring apparatus 1 according to an embodiment of the present invention lifts a glass plate 2 as a thin plate and transfers it to a predetermined place. 550mm, thickness 0.7mm or 1.1mm
A pedestal 3 corresponding to the size of 2) is provided movably in the horizontal direction above the surface plate 16, and a carry-in conveyor C1 is arranged on the carry-in side of the surface plate 16. An unloading conveyor C2 is disposed on the unloading side of the unit 16, and a moving device (not shown) for horizontally moving the pedestal 3 between the unloading conveyor C1, the platen 16, and the unloading conveyor C2 is provided.

An elevating device 3A for elevating the pedestal 3 with respect to the surface plate 16 is provided.
A plurality of elevating members 5 are mounted via mounting angles 4, and these elevating members 5, as shown in the plan view of FIG.
Is arranged at a position corresponding to the center in the width direction (transport direction).

An elevating cylinder device 6 for elevating each elevating member 5 is provided, and a stopper 7 for restricting an elevating range of the elevating member 5 is provided between the mounting angle 4 and the elevating member 5.

A pressing cylinder device 9 is provided on a side surface of the lifting member 5.
Is attached, and the rod 10 of the pressing cylinder device 9 is
The pressing member 11 is attached to the. A holding claw member (an example of a holding member) 13 is swingably attached to a lower portion of the side surface of the elevating member 5 via a swing shaft member 12.
A compression spring 14 for urging the holding claw member 13 in the opening direction is interposed between the middle of the movement and the side surface of the elevating member 5, and the pressing member 11 is in contact with the upper end of the holding claw member 13. Face 15
Is formed at the lower end of the holding claw member 13 and the glass plate 2
A holding claw 17 having an L-shaped cross section is formed between the base plate 16 and the surface plate 16 on which the holding claw 17 is placed to support the lower surface of the corner of the glass plate 2.

The width of each of the holding claws 17 and the movement preventing member 18 is formed to be about 5 mm so as to reduce the portion of the holding claw 17 and the movement preventing member 18 that is caught on the glass plate 2. The upper surface of the surface plate 16 has an insertion recess 2 into which the holding claws 17 are inserted from above.
7 are formed.

When the periphery of the glass plate 2 is lifted by the holding claws 17, a separating gas (in this case, air) 20 having a predetermined pressure is blown from the side into the gap between the surface plate 16 and the glass plate 2. The spraying device 21 is provided.
Is composed of a plurality of spray nozzles 22 arranged in the vicinity of each holding claw 17 and one air supply pump 24 for supplying each of the spray nozzles 22 through a spray pipe 23. An electromagnetic valve 25 is provided in the middle of each spray pipe 23, and the air supply pump 24 is mounted on the base 3. The tip of the spray nozzle 22 is directed in a direction along the transport direction of the glass plate 2.

In the above configuration, the glass plate 2 is transported to the loading side of the platen 16 by the loading conveyor C1. Then, the pedestal 3 is moved to above the glass plate 2 by driving the moving device, the pedestal 3 is lowered by driving the lifting / lowering device 3A, and the lifting / lowering member 5 is lowered by driving each of the lifting / lowering cylinder devices 6. Then, the pressing cylinder device 9 is driven. Then, the pressing member 11 presses the contact surface 15 against the urging of the compression spring 14, the holding claw member 13 rotates around the pivot shaft member 12 and closes, and the holding claw 17 is connected to the glass plate 2. The glass sheet 2 is inserted between the carry-in conveyor C1 and each holding claw 17 supports the lower surface of the periphery of the glass plate 2 at the corners and the center.

In this state, the pedestal 3 is raised by driving the lifting / lowering device 3A, and the lifting / lowering member 5 is driven by driving the lifting / lowering cylinder device 6, thereby lifting the glass plate 2 from the loading conveyor C1. The pedestal 3 is moved above the surface plate 16 by driving the moving device, and the pedestal 3 is moved down again by driving the lifting / lowering device 3A, and the lifting / lowering member 5 is lowered by driving each of the lifting / lowering cylinder devices 6. . Then, the glass plate 2 is positioned on the surface plate 16, and the holding claws 17 of the holding claw members 13 are inserted into the insertion recesses 27 of the surface plate 16. When the driving of the pressing cylinder device 9 is released, the holding claw member 13 is rotated around the pivot shaft member 12 and opened by the elasticity of the compression spring 14, and the holding state of the glass plate 2 is released. Next, the pedestal 3 is raised by driving the lifting device 3A,
Further, the moving device is driven to move the pedestal 3 to the carry-in conveyor C1 side, and the glass plate 2 is polished by the polishing device using the cleaning water W. When the polishing operation by the polishing device is completed, the glass plate 2 is in a wet state, and the glass plate 2 is in close contact with the surface plate 16.

Next, when the polishing operation is completed, the glass plate 2 is carried out to the carry-out conveyor C2. At this time, the moving device is driven so that the pedestal 3 is positioned above the glass plate 2, and the pedestal 3 is moved up and down in the same manner as described above. The device 3A is driven to lower the pedestal 3, and the respective lifting and lowering cylinder devices 6 are driven to lower the lifting member 5. At this time, the holding claw 17 of the holding claw member 13 is
The holding claw member 13 is inserted into the insertion recess 27, and the pressing claw member 9 is driven to press the pressing member 11 against the contact surface 15 against the urging of the compression spring 14, whereby the holding claw member 13 is pivoted. The glass plate 2 is turned around 12 and closed, and the holding claws 17 enter the state where the glass plate 2 enters the lower surface of the periphery of the glass plate 2 below the corners and the center, and supports the glass plate 2.

Then, the lifting and lowering cylinder devices 6 at the four corners are sequentially driven at different timings, and lifted from the corners of the glass plate 2. In addition, the solenoid valve 25 is driven to sequentially drive the lifting / lowering cylinder device 6 (the holding claw 17).
The peeling gas 20 is supplied from the spray nozzle 22 to the glass plate 2
Is sprayed at a predetermined pressure and for a predetermined time along the transport direction of. Then, as shown in FIGS. 3 and 4, the cleaning water W is driven to the center side of the glass plate 2, so that the cleaning water W
Can be forcibly shortened, and the glass plate 2 can be prevented from being damaged even if the lifting / lowering speed of the lifting / lowering cylinder device 6 is increased.

FIG. 5 shows a cylinder device 6 for lifting and lowering at four corners.
(A to D) drive timing and each electromagnetic valve 25 (S
5A to 5D are timing charts showing the drive timings of FIGS. a to Sd).
After an hour, that is, after the glass plate 2 is slightly lifted,
The electromagnetic valve 25 (Sa) is driven for a time ts (for example, 0.1 second to several seconds), and the gas 20 for separation is discharged from the spray nozzle 22.
Is sprayed at a predetermined pressure along the conveying direction of the glass plate 2, the holding claws 1 corresponding to the lifting / lowering cylinder device 6 (A)
The time required for the cylinder 7 to rise completely is tn (for example, several seconds to 10 seconds).
And the electromagnetic valve 25, the glass plate 2
It takes a total of Tn time to float from the surface plate 16.

FIG. 7 shows a conventional case in which the separating gas 20 is not blown between the glass plate 2 and the platen 16. The lifting claw 17 is completely raised by driving the lifting / lowering cylinder device 6 (A). Until to time (20 to 40 seconds = to> tn) is required. In this case, a total To time (To> Tn) is required until the glass plate 2 is lifted.

In FIG. 7, tp is a grace period until the next lifting / lowering cylinder device 6 is driven. According to the embodiment of the present invention, the cleaning water W is driven to the vicinity of the center of the glass plate 2. By adjusting the amount of the stripping gas 20 or the wind power (pressure) blown from the spray nozzle 22 as described above, the delay time tp becomes unnecessary.

After the glass plate 2 is lifted from the surface plate 16, the pedestal 3 is raised by driving the lifting / lowering device 3A.
Further, by driving the lifting / lowering cylinder device 6 to raise the lifting / lowering member 5, the glass plate 2 is further lifted from the surface plate 16, and the moving device is driven to move the pedestal 3 to the carry-out conveyor C2. Is driven to lower the pedestal 3, drive the respective lifting and lowering cylinder devices 6, lower the lifting member 5, and place the glass plate 2 on the carry-out conveyor C2.

As described above, according to the embodiment of the present invention, even if the glass plate 2 is in a wet state and is in close contact with the surface plate 16, the lifting and lowering cylinder devices 6 at the four corners are shifted in timing. The holding claw member 13
By lifting the periphery of the glass plate 2 with the holding claws 17, and spraying the separating gas 20 between the glass plate 2 and the surface plate 16, the cleaning water W is forcibly driven to the center side of the glass plate 2. Since the glass plate 2 can be quickly lifted, the working time can be reduced.

In the above embodiment, the drive timing of each of the lifting and lowering cylinder devices 6 is shifted. However, the present invention is not limited to this. As shown in FIG. A to D) are driven synchronously, and the electromagnetic valves 25 (Sa to Sd) are driven synchronously after ts time by driving the lifting / lowering cylinder device 6, and the glass plate 2 and the platen 16 are Separation gas 20 between
Can be simultaneously sprayed. In this case, the time required to lift the glass plate 2 from the surface plate 16 is Tm (Tn> Tm), and the working time can be further reduced.

Although the separating gas 20 is blown between the glass plate 2 and the platen 16 from the blowing nozzle 22 in the conveying direction of the glass plate 2, it is not limited to this. Instead, for example, the tip of the spray nozzle 22 may be directed diagonally to the glass plate 2 so that the separation gas 20 may be blown diagonally to the glass plate 2. The same effect as the embodiment can be obtained.

Furthermore, in the above-described embodiment, the stripping gas 20 is blown only once from each spraying nozzle 22. However, the present invention is not limited to this. It is also possible to spray a plurality of times, and in this case, the same effect as in the above embodiment can be obtained.

[0030]

As is apparent from the above description, according to the present invention, a carrier according to the size of a thin plate is movably provided above the thin plate, and the peripheral portion of the thin plate is placed on the carrier at a predetermined position. An elevating device having a plurality of holding members for holding is arranged, and on the transport table, when the thin plate is lifted from the surface plate by the holding member, for blowing the separation gas into the gap between the surface plate and the thin plate. A spraying device having a spray nozzle is provided, and when lifting a thin plate placed on the surface plate, it is placed on the surface plate with a holding member provided on a carriage movably disposed above the surface plate. Holds a predetermined position around the thin plate and lifts it, and forcibly blows a separating gas from the spray nozzle provided on the transfer table into the gap between the platen and the thin plate for a predetermined pressure and for a predetermined period of time. The lifting speed of the holding member can be increased, It is possible to reduce the overall between.

[Brief description of the drawings]

FIG. 1 is a front view showing an entire configuration of a glass sheet holding and conveying device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view similarly.

FIG. 3 is a side view showing a state in which a glass plate is lifted by a holding claw and a separating gas is blown into a gap between a surface plate and a thin plate.

FIG. 4 is a front view of the same.

FIG. 5 is a timing chart showing the drive timing of the lifting cylinder device at the four corners and the drive timing of each electromagnetic valve.

FIG. 6 is a timing chart showing the drive timing of the lifting and lowering cylinder devices at the four corners of the holding and conveying device and the drive timing of each electromagnetic valve according to another embodiment of the present invention.

FIG. 7 is a timing chart showing a driving timing of a lifting and lowering cylinder device of a conventional holding and conveying device.

[Explanation of symbols]

 2 Glass plate 3 Pedestal 3A Lifting device 5 Lifting member 6 Lifting cylinder device 9 Pressing cylinder device 11 Pressing member 12 Oscillating shaft member 13 Holding claw member 14 Compression spring 15 Contact surface 16 Surface plate 17 Holding claw 20 Peeling gas Reference Signs List 21 spray device 22 spray nozzle 23 spray tube 24 air supply pump 25 solenoid valve 27 insertion recess

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kunio Miyawaki 1-7-89, Minamikohoku, Suminoe-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Kenji Kamikawa 1-chome, Minamikohoku, Suminoe-ku, Osaka-shi, Osaka No. 7-89 Hitachi Zosen Corporation (72) Inventor Shoichi Nakatsu 1180, Yojibe, Maizuru, Kyoto Prefecture Hitachi Zosen Metal Works Co., Ltd. (72) Inventor Shinji Furusawa 1180, Yojibe, Maizuru, Kyoto Prefecture Hitachi Zosen Meta F-term in REWORKS CO., LTD. (Reference) 3F061 AA01 BA05 BB02 BC19 BD03 BD09 BE05 BF00 DB04 DB06 5F031 CA05 FA02 HA33

Claims (2)

[Claims] 1. A thin plate holding / transporting device for lifting a thin plate placed on a surface plate and transporting the thin plate to a predetermined place, wherein a transfer table according to the size of the thin plate is movable above the thin plate. Provided on this carrier, an elevating device including a plurality of holding members for holding the peripheral portion of the thin plate at a predetermined position is arranged, and when the thin plate is lifted from the surface plate by the holding member, A holding and conveying device for a thin plate, comprising: a spraying device having a spray nozzle for blowing a separating gas from a side to a gap between the surface plate and the thin plate. 2. A method for holding and transporting a thin plate placed on a surface plate and lifting the thin plate placed on the surface plate when the thin plate placed on the surface plate is lifted. With a holding member provided on a transfer table movably arranged at a predetermined position in the peripheral portion of the thin plate placed on the surface plate, lifted,
A method of holding and transporting a thin plate, wherein a separating gas is sprayed from a spray nozzle provided on a transfer table to a gap between the surface plate and the thin plate from the side to separate the gas.