WO2011121895A1

WO2011121895A1 - Glass sheet processing method and glass sheet processing device

Info

Publication number: WO2011121895A1
Application number: PCT/JP2011/001342
Authority: WO
Inventors: 和明坂東
Original assignee: 坂東機工株式会社
Priority date: 2010-03-29
Filing date: 2011-03-07
Publication date: 2011-10-06
Also published as: JP5561360B2; JPWO2011121640A1; WO2011121640A1

Abstract

Disclosed is a glass sheet processing device (1) which is fitted with: a first-side rotary suction cup device (4A) which moves back and forth between a first-side glass sheet insertion area (S1) and a grinding area (23); and a second-side rotary suction cup device (4B) which moves back and forth between a second-side glass sheet insertion area (S2) and the grinding area (23). Both of the rotary suction cup devices (4A and 4B) are fitted in such a way as to alternately advance into the grinding area (23).

Description

Glass plate processing method and glass plate processing apparatus

The present invention relates to a method of linearly grinding a peripheral edge of a glass plate or a liquid crystal panel for a solar cell, a liquid crystal television, a plasma television or the like, and an apparatus for grinding. The present invention also relates to a glass plate processing method and processing apparatus for grinding (or polishing) the four sides around the quadrangular glass plate.

Furthermore, the present invention relates to a glass plate processing method and processing apparatus capable of performing corner cutting processing of four corner portions together with grinding processing of four sides around a quadrangular glass plate.

Furthermore, the present invention provides an improved glass plate processing method and processing apparatus that holds a square glass plate by suction, rotates and stops by 90 °, linearly moves (horizontal movement), and sequentially processes four sides. Concerning.

FIG. 6 shows a conventionally proposed glass plate processing apparatus in the field of the present invention.

In this glass plate processing apparatus, a grinding area 50 is disposed on the front surface, and a glass plate insertion area 51 is disposed on one side of the grinding area 50. In the lower part of the grinding area 50, a grinding means 53 having a grinding wheel 52 is provided.

The rotary suction cup device 54 moves in the Y-axis through the grinding area 50 and the glass plate insertion area 51, and the single rotary suction cup device 54 receives the glass plate 2 in the insertion area 51 and sucks it. Holding and proceeding to the grinding area 50, the glass plate 2 is rotated and stopped by 90 °, and the lower end that has been turned to the lower end is moved in the Y-axis in a state parallel to the Y-axis moving line 55. The operation of grinding the lower end side 24 by the grinding means 53 is repeated for each side, and when the grinding of the four sides of the glass plate 2 is finished, the processing returns to the glass plate entry area 51 to release the processed glass plate 2 and the next glass. Receive board 2. The rotary suction device 54 sucks and holds the received glass plate 2 and proceeds to the grinding area 50 again to perform grinding.

In the conventional glass plate processing apparatus, the rotary sucker device only delivers the glass plate in the glass plate entry area.

For this reason, the rotary sucker device always performs either the glass plate delivery in the glass plate entry area or the grinding operation in the grinding area. Therefore, when the glass plate is transferred in the glass plate entry area, naturally, grinding is not performed. Therefore, the grinding process is performed only intermittently at time intervals. For this reason, it is far from the continuity of the grinding process, and the productivity is not increased at a very impossible rate.

Therefore, the present invention eliminates defects as in the conventional glass plate processing apparatus, performs grinding operations more continuously, increases efficiency, and has a high production capacity. Is to provide.

Furthermore, the present invention provides a glass plate processing method and a glass plate which efficiently grinds four sides of a glass plate and can perform corner cutting of four corners in conjunction with the grinding of the four sides. It is going to provide the processing apparatus of.

In the left-right direction of the front, the glass plate entry area is arranged on both sides, the grinding area is arranged in the center, and a Y-axis track is provided through the glass plate entry area and the center grinding area on both sides. Corresponding to each glass plate entry area, the two rotary sucker devices are moved so as to move independently from each other on the Y axis, and one rotary sucker device is ground with one glass plate entry area. So that the other rotary suction cup device moves between the other glass plate entry area and the grinding area, and both the rotary suction cup devices advance to the grinding area alternately. In one part of the grinding area, there is provided a grinding means in which a grinding wheel is positioned in a path on one side of the glass plate, and both the rotary suction cups are numerically controlled. The Y-axis moving table that moves in the Y-axis, the X-axis moving means provided in the X direction with respect to the Y-axis in front of the Y-axis moving table, and the X-axis moving means numerically controlled by the X-axis moving means A rotating sucker mounted in front of a moving moving body, and the rotating sucker sucks and holds the glass plate on the front surface along the plane coordinate system plane composed of the Y axis and the X axis, and is numerically controlled rotation. Each rotary sucker device holds the glass plate by suction on the rotary sucker and makes one side of the glass plate parallel to the Y axis by rotating and stopping each 90 °. The X axis moving means adjusts the distance between the one side of the glass plate and the grinding wheel, moves the Y axis, and grinds the one side with the grinding wheel of the grinding means. Repeat the process for each other side of the glass plate Each of the glass plate entrance areas on both sides is equipped with a grinding wheel device, and each of the two rotary suction cup devices releases the processed glass plate in each glass plate entrance area, and While receiving, while rotating the numerically controlled X-axis to the rotating suction cup holding the glass plate with respect to the grinding wheel device, further rotating the glass plate numerically and controlling the glass plate against the grinding wheel device, polar coordinates This is a glass plate processing apparatus that performs rough grinding on four sides and corner cutting on four corners by a control operation.

Further, in the front left and right direction, glass plate insertion areas are arranged on both sides, and a grinding area is arranged in the center, and a Y axis track is provided through the glass plate insertion area and the central grinding area on both sides. Two rotary sucker devices are provided on the track so as to move in the Y-axis corresponding to the respective glass plate entry areas, and one rotary sucker device proceeds to the grinding area to perform grinding. When the other rotary suction cup device releases and receives the glass plate in the glass plate insertion area, and then the one rotary suction cup device returns from the grinding area to its own glass plate insertion area, the grinding Instead, the two rotary suction cups are alternately moved to the respective rotary suction cups so that the other rotary suction cup advances while holding the glass plate and performs grinding. The glass plate is held from the glass plate entry area and proceeds to the grinding area to perform grinding, and each rotary sucker device rotates and stops the held glass plate by 90 ° in the grinding area. One side is made parallel to the Y-axis trajectory, and the Y-axis is moved in a state where the distance between the one side of the glass plate and the grinding wheel is adjusted by the X-axis moving means. The operation of grinding the side by the grinding means is repeated for each of the other sides to perform the grinding of the four sides of the glass plate, and each glass plate entry area on both sides is equipped with a grinding wheel device at one site, Two rotary sucker devices release the processed glass plate in each glass plate entry area, and adsorb the glass plate to the grinding wheel device as the next glass plate is received While holding the rotating suction cup with the numerical control straight path, the glass plate is further numerically controlled to rotate, and the rough grinding of the four sides and the corner cutting of the four corners are performed by polar coordinate control while the glass plate is applied to the grinding wheel device. It is the processing method of the glass plate made to perform.

According to the glass plate processing method and processing apparatus of the present invention as described above, the glass plate insertion areas are provided on both sides of the grinding area, and the rotary sucker devices are alternately arranged on the glass plate insertion areas on both sides. Is held by suction and proceeds to the common grinding area to perform grinding. For this reason, when one rotary suction cup device is grinding in the grinding area, the other rotary suction cup device can deliver the glass plate in the glass plate entry area. When grinding in the processing area, one of the rotary suction cups mentioned above can return to its own glass plate entry area to release the processed glass plate and receive the next glass plate, and the glass plate entry areas on both sides Includes a grinding wheel device, and one of the rotary suction cup devices and the other of the rotary suction cup devices is controlled by the numerical control rotation and the numerical control movement of the rotary suction cup to control polar coordinates with the grinding wheel device. Thus, in each glass plate entry area, the received glass plate is immediately subjected to rough grinding on four sides, and further corner cut processing is performed. The surrounding four sides can be ground in two places: a grinding area and a glass plate entry area. For this reason, the burden (grinding amount) of the main grinding process in a grinding process area becomes small, and the grinding of four sides is performed accurately and efficiently, and the production capacity is greatly improved. Of course, corner cut processing is also performed and it is efficient. Furthermore, according to the present invention, it is possible to provide a glass plate processing method and a glass plate processing apparatus that can perform corner cutting of four corners in accordance with grinding of four sides of the glass plate.

FIG. 1 is a front view of a glass plate processing apparatus showing an embodiment of the present invention. 2 is a view taken along the line II of the glass plate processing apparatus shown in FIG. 3 is a cross-sectional view taken along the line II-II of the glass plate processing apparatus shown in FIG. FIG. 4 is an explanatory view showing that the glass plate processing method is being carried out in the glass plate processing apparatus shown in FIG. FIG. 5 is an explanatory view showing that the glass plate processing method is being carried out in the glass plate processing apparatus shown in FIG. FIG. 6 is an explanatory diagram of the prior art.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Of course, since the glass plate processing method of this invention is implemented in a glass plate processing apparatus, the processing method of this invention is demonstrated with embodiment about a glass plate processing apparatus.

In the glass plate processing apparatus 1 of this example, as shown in FIGS. 1, 4, and 5, a grinding area 23 is located at the center C along the left-right direction on the front surface. The glass plate entry area S1 is arranged on the right side R of the glass plate, and the glass plate entry area S2 is arranged on the left side L.

Then, common Y-

axis guide rails

3 and 3 are provided through the grinding area 23 in the center C and the glass plate insertion areas S1 and S2 on both sides. The Y-

axis guide rails

3 and 3 are attached to the front surface of a pedestal 32 that is erected on standing

structures

31 and 31 that are erected from the base 30.

The two rotary

suction cup devices

4A and 4B are attached to the common Y-

axis guide rails

3 and 3 through the slide block, and are slidably guided in the Y-axis direction.

One of the two rotary

suction cup devices

4A and 4B is the first rotary suction cup device 4A and the other is the second rotary suction cup device 4B. On the right side R, the first rotary suction cup device 4A moves numerically between the glass plate insertion area S1 and the grinding area 23 at the center C and moves in the Y axis, and the second rotary suction cup device 4B moves on the left side L. , The glass plate entering area S2 and the grinding area 23 at the center C are numerically controlled to move in the Y axis.

The first rotary sucker device 4A is Y-axis driven by the first Y-axis servo motor 6 and the feed screw 7, and the second rotary sucker device 4B is Y-axis driven by the second Y-axis servo motor 8 and the feed screw 9. Accordingly, the first rotary suction cup device 4A and the second rotary suction cup device 4B perform the Y-axis movement independently of each other.

Next, the structure and operation of the first rotary suction cup device 4A and the second rotary suction cup device 4B will be described with reference to FIG. 1, FIG. 2, FIG. 3, FIG.

The first rotary suction cup device 4A and the second rotary suction cup device 4B have the same structure and operation, and therefore the first rotary suction cup device 4A will be described below.

The first rotary suction cup device 4A is attached to the Y-

axis guide rails

3 and 3 via a plurality of slide blocks 11 and 11, and is attached to the front surface of the Y-axis move base 10. An X-axis moving means 12 and a rotary suction cup 5A attached to the front surface of the X-axis moving body 13 constituting the X-axis moving means 12 are provided.

The Y-axis driven feed screw 7 is connected to the Y-axis moving table 10 via a nut (not shown).

The X-axis moving unit 12 includes

guide rails

14 and 14 attached to the front surface of the Y-axis moving table 10, an X-axis moving body 13 linearly guided in the X-axis direction by the guide rails 14 and 14, and the X-axis moving unit 12. It comprises an X-axis servomotor 16 and a feed screw 17 that move the moving body 13 in the X-axis controlled numerically. The guide rails 14 and 14 are attached orthogonally to the Y-axis guides 3 and 3.

Therefore, the X-axis moving body 13 and the rotary suction cup 5A attached to the front surface of the X-axis moving body 13 perform X-axis movement (vertical movement) perpendicular to the Y-axis. Further, of course, the rotary sucker 5A is attached in parallel to the X axis, holds the glass plate 2 by suction, and rotates the glass plate 2 along a plane coordinate system composed of the Y axis and the X axis.

The rotary suction cup 5A includes a rotation drive device. This rotational drive device receives a command from the NC device, and rotates the suction portion 18 of the glass plate 2 and thus the glass plate 2 by numerical control.

The entire first rotary suction cup device 4A configured as described above is numerically controlled by the first Y-axis servomotor 6 that receives a command from the NC device and moves in the Y axis (horizontal movement), and the rotary suction cup 5A is also commanded from the NC device. The X axis is moved (up and down) numerically controlled by the received X axis servomotor 16. Therefore, the rotary suction cup 5A rotates the glass plate 2 attracted and held numerically controlled along the plane coordinate system plane while moving the plane coordinate system composed of the Y axis and the X axis.

Of course, the second rotary suction cup device 4B and the rotary suction cup 5B are independently adsorbing the same numerically controlled Y-axis movement and X-axis movement and glass plate to the first rotary suction cup device 4A and the rotary suction cup 5A. The same numerically controlled rotation is performed.

The grinding area 23 in the center C is a common area where the first rotary suction cup device 4A and the second rotary suction cup device 4B suck and hold the glass plate 2 and proceed alternately to perform the grinding operation. . Further, the first rotary suction cup device 4A and the second rotary suction cup device 4B are configured to rotate and stop the held glass plate 2 by 90 ° in the grinding area 23, and the plane coordinates composed of the X axis and the Y axis. The system movement is repeated and the lower end side 24 is ground.

The grinding means 20 is provided in the common grinding area 23 described above. Of course, the grinding means 20 includes a grinding wheel 21. The grinding wheel 21 is provided in accordance with the path of the lower end side 24 of the glass plate 2 sucked and held by the

rotary suction cups

5A and 5B of the first rotary suction cup device 4A and the second rotary suction cup device 4B.

The grinding means 20 includes a grinding head 27 provided with the grinding wheel 21, a spindle motor 26 to which the grinding wheel 21 is attached, and a rotational motor for driving the grinding wheel 21, and the grinding head 27 along the Y axis. And a grinding head moving means 28 that moves in parallel. The grinding head moving means 28 is attached to the base 30 via a bracket 29.

The grinding head moving means 28 is attached to the guide rails 33 and 33 via

guide rails

33 and 33 attached to the upper surface of the bracket 29 in parallel with the Y-

axis guide rails

3 and 3 and a slide block. The moving table 34, a feed screw 35 for moving the moving table 34, and a feed motor 36 for driving the feed screw 35, and the grinding head 27 is attached to the moving table 34.

In this embodiment, as shown in FIGS. 1, 4 and 5, one grinding head 27 is provided, but usually two or three grinding heads are provided according to the grinding quality.

By the grinding head moving means 28, the grinding head 27 and the grinding wheel 21 are moved in parallel with the Y axis.

In the grinding means 20, the grinding action point of the grinding wheel 21 is located at a height position where the lower edge 24 (edge coming to the lower edge) of the glass plate 2 passes.

In the center C, grinding of the lower edge 24 of the glass plate 2 held by the first rotary suction cup device 4A and the second rotary suction cup device 4B is performed by grinding the glass plate 2 held by the rotary

suction cup device

4A or 4B. The wheel 21 moves to face each other, and grinding is performed in a state in which both wheels rub against each other.

In this way, both the moving distances can be shortened, the grinding time can be shortened, and the entire length of the glass plate processing apparatus 1 can be shortened.

In each of the glass plate insertion areas S1 and S2 arranged on both sides, each of the first rotary suction cup device 4A and the second rotary suction cup device 4B alternately takes the processed glass plate 2 from the grinding processing area 23 in the center C. It is also a position to hold and return, open the processed glass plate 2 and receive the next glass plate 2.

Furthermore, it is also an area where rough grinding and corner cutting on the four sides around the next received glass plate 2 are first performed. That is, when each of the first rotary suction cup device 4A and the second rotary suction cup device 4B receives the next glass plate 2, first, in each glass plate entry area S1 or S2, the four locations of the glass plate 2 are set. Corner cutting is also performed at the corner (corner).

Also, each glass plate entry area S1, S2 is provided with a grinding wheel device 40 in the lower part. As shown in FIGS. 1, 4, and 5, the grinding wheel device 40 according to the present embodiment includes a grinding wheel 41 and a spindle motor 42 that is mounted with the grinding wheel 41 and rotates the grinding wheel 41. And a slide device 43 that holds the spindle motor 42 and adjusts the plane lines of the grinding wheel 41 and the glass plate 2 to match each other. The grinding wheel device 40 is mounted on the bracket 44 standing from the base 30 via the slide device 43. The operations of the rough grinding process and the corner cutting process by the first rotary suction cup device 4A and the second rotary suction cup device 4B are numerically controlled on the

rotary suction cups

5A and 5B that hold the glass plate 2 by suction with respect to the grinding wheel 40. While the X-axis movement is performed, the glass plate 2 is further subjected to numerical control rotation θ, and the glass plate 2 is applied to the grinding wheel 41 by polar coordinate control.

Each of the glass plate entry areas S1 and S2 is disposed at a position where the glass plate entry areas S1 and S2 and the grinding area 23 at the center C do not interfere with each other when the glass plate 2 is rotated.

Next, a method of processing the glass plate 2 by the glass plate processing apparatus 1 as described above will be described.

The first rotary suction cup device 4A and the second rotary suction cup device 4B hold the glass plate on the front surface and alternately place the glass plate insertion areas S1 and S2 on both sides and the grinding area 23 at the center C alternately. The grinding process is performed alternately in the grinding process area 23.

That is, as shown in FIGS. 1, 4 and 5, the first rotary suction cup device 4A receives the glass plate 2 in the glass plate entry area S1, and the receiving glass plate 2 is roughened on four sides by polar coordinate control operations. When performing the grinding process and the corner cutting process, the second rotary suction cup device 4B performs the main grinding process of the four sides of the glass plate in the grinding process area 23 at the center C.

When the grinding of the second rotary suction cup device 4B in the grinding area 23 is completed, the second rotary suction cup device 4B holds the processed glass plate 2 and returns to its own glass plate insertion area S2 to perform the grinding processing. The finished glass plate 2 is released, the next glass plate 2 is received, and coarse grinding processing and corner cutting processing of four surrounding sides are started by polar coordinate control. At this time, one of the first rotary suction cups 4A has already held the glass plate 2 that has been subjected to the rough grinding and corner cutting processing on the four sides and proceeds to the grinding area 23, and has four sides around the glass plate 2. The grinding operation is performed.

When the grinding of the first rotary suction cup device 4A in the grinding area 23 is completed, the first rotary suction cup device 4A again holds the ground glass plate from the grinding area 23 and holds its own glass plate. Returning to the entry area S1, the ground glass plate is released, the next glass plate is received, and the four sides of rough grinding and corner cutting are started by the polar coordinate control operation. On the other hand, in the grinding area 23, the second rotary suction cup device 4 </ b> B advances while holding the next glass plate 2 having been subjected to rough grinding and corner cutting on the four sides, and the four sides around the glass plate 2. This is the main grinding process.

The first rotary suction cup device 4A and the second rotary suction cup device 4B alternately deliver the glass plate 2 in the respective glass plate entry areas S1 and S2, and perform rough grinding processing and corner cutting processing on four sides, alternately in the center. By proceeding to the grinding area 23 of C and performing the four-side grinding process, the grinding process in the grinding area 23 is performed lightly, quickly and accurately, and the production capacity of the glass sheet grinding process is increased. .

The grinding operation of the four sides around the glass plate by the first rotary suction device 4A and the second rotary suction device 4B in the grinding area 23 in the center C is the same as the conventional glass plate processing device. The square glass plate held on the

rotary suction cups

5A and 5B is rotated and stopped by 90 °, and the lower end side 24 that has turned to the lower end is parallel to the Y axis and moved by the X axis to move the lower end side 24 of the grinding means 20. The operation of moving the Y-axis while adjusting the distance to the grinding wheel 21 and grinding the lower end side 24 by rubbing with the grinding wheel 21 of the grinding means 20 is repeated for each side, and grinding is performed on four sides. I do. As described above, the grinding process is efficiently performed in such a manner that the glass plate 2 and the grinding wheel 21 of the grinding means 20 are moved to face each other and are in contact with each other.

DESCRIPTION OF SYMBOLS 1 Glass plate processing apparatus 4A 1st rotation suction cup device 4B 2nd rotation suction cup device 5A Rotation suction cup 5B Rotation suction cup S1 Glass plate insertion area S2 Glass plate insertion area 40 Grinding wheel device 23 Grinding processing area

Claims

In the left-right direction of the front, the glass plate entry area is located on both sides, the grinding area is located in the center, and a Y-axis track is provided through the glass plate entry area and the center grinding area on both sides. In correspondence with each glass plate insertion area, two rotary sucker devices are provided to move independently of each other on the Y axis, and one rotary sucker device proceeds to the grinding area and performs grinding. During processing, the other rotary sucker device releases the ground glass plate and receives the next glass plate in the glass plate insertion area, and then the one rotary sucker device performs the grinding process. When returning from the area to its own glass plate entry area, instead of the above grinding process, the other rotary sucker device proceeds with holding the glass plate to perform the grinding process. The two rotary sucker devices alternately hold the glass plate from each glass plate entry area and proceed to the grinding area to perform grinding, and each rotary sucker device is held in the grinding area. The glass plate is rotated and stopped by 90 °, and one side is made parallel to the Y-axis track by the rotation, and the distance between the one side of the glass plate and the grinding wheel is adjusted by the X-axis moving means. In the method of processing a glass plate, the operation of moving the Y axis in the state and grinding one side of the glass plate by the grinding means is repeated for each of the other sides to grind the four sides of the glass plate. The two rotary sucker devices by the grinding wheel device provided in the respective glass plate entry areas on both sides allow the processed glass plate in each glass plate entry area. Release the next glass plate and simultaneously rotate the suction sucker that holds the glass plate to the grinding wheel device by numerical control, and further rotate the glass plate by numerical control to move the glass plate to the grinding wheel device. A processing method of a glass plate in which rough grinding of four sides and corner cutting of four corners are performed by polar coordinate control while applying.
Each glass plate entry area on both sides is equipped with a grinding wheel device in one part, and the two rotary sucker devices release the processed glass plate and receive the next glass plate in each glass plate entry area In addition, numerically rotating the glass plate while numerically controlling the rotary sucker holding the glass plate by suction with respect to the grinding wheel device, and further rotating the glass plate by numerical control, and applying the glass plate to the grinding wheel device by polar coordinate control The processing method of the glass plate of Claim 1 which performed the rough grinding process of 4 sides, and the corner cut process of 4 corner parts.
In the left-right direction of the front, a glass plate entry area is arranged on both sides and a common grinding area is arranged in the center, and a Y-axis track is provided through the glass plate entry area on both sides and the central grinding area. Corresponding to the glass plate entry areas, the two rotary suction cup devices are moved on the track so as to move independently from each other on the Y axis, and one rotary suction cup device has one glass plate entry area. And the other rotary suction cup device move between the other glass plate entry area and the grinding area, and both of the rotary suction cup devices alternately proceed to the grinding area. In one part of the grinding area, there is provided a grinding means for positioning a grinding wheel in a passage on one side of the glass plate, and both the rotary sucker devices are A Y-axis moving base that moves numerically and moves in the Y-axis, an X-axis moving means that is provided in front of the Y-axis moving base along the X direction with respect to the Y-axis, and numerically controlled by the X-axis moving means. A rotary sucker mounted in front of a moving body that moves on the X axis, and the rotary sucker sucks and holds the glass plate on the front surface along the plane coordinate system plane composed of the Y axis and the X axis, and is numerically controlled. Each rotation sucker device sucks and holds the glass plate on the rotation sucker and makes each side of the glass plate parallel to the Y axis by rotating and stopping in 90 ° increments. In addition, the X axis moving means adjusts the distance from the one side of the glass plate, moves the Y axis, and grinds the one side with the grinding wheel of the grinding means. Repeat for each other side of the glass plate, Each glass plate entry area on the side is equipped with a grinding wheel device, and each of the two rotary suction cup devices is free of the processed glass plate and receives the next glass plate in each glass plate entry area, While rotating the rotary sucker holding the glass plate with respect to the grinding wheel device by numerically controlled X-axis movement, the glass plate is further numerically controlled and rotated by polar coordinate control while applying the glass plate to the grinding wheel device. An apparatus for processing a glass plate that performs rough grinding of sides and corner cutting of four corners.
In the left-right direction of the front, the glass plate entrance area is located on both sides, and a common grinding area is placed in the center. A Y-axis track is provided through the glass plate entry area on both sides and the central grinding area. Two rotary sucker devices are arranged on the shaft track so as to move in the Y-axis independently of each other, corresponding to each glass plate entry area, and one rotary sucker device is a glass plate. The rotary suction cup device moves between the entry area and the grinding area, and the other rotary suction cup device moves between the other glass plate insertion area and the grinding area. In one part of the grinding area, there is provided a grinding means having a grinding wheel positioned in a passage on one side of the glass plate, Is a numerically controlled Y-axis moving base that moves in the Y-axis, an X-axis moving means provided in front of the Y-axis moving base along the X direction with respect to the Y-axis, and numerical control in the X-axis moving means And a rotary sucker mounted along the X axis on the front side of the moving body that moves along the X axis. The rotary sucker sucks the glass plate along the plane coordinate system plane composed of the Y axis and the X axis on the front surface. Each rotating sucker device holds and holds the glass plate on the rotating sucker, and rotates and stops in 90 ° increments to stop one side of the glass plate. Is adjusted in parallel with the Y-axis, and the X-axis moving means adjusts the distance from the one side of the glass plate to move the Y-axis, and the one side is rubbed with the grinding wheel of the grinding means. Will be repeated for each other side of the glass plate. In each glass plate entry area on both sides, a grinding wheel device is provided in one part, and the two rotary suction cup devices release the processed glass plate in each glass plate entry area, and the next glass While receiving the plate, while rotating the suction cup holding the glass plate against the grinding wheel device by numerically controlling the X-axis movement, the glass plate is further numerically controlled to apply the glass plate to the grinding wheel device. However, the processing apparatus of the glass plate which performed the rough grinding process of 4 sides and the corner cut process of 4 corner parts by polar coordinate control.