JP3319782B2 - Glass polishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for polishing a glass plate used for a liquid crystal display.

[0002]

2. Description of the Related Art Generally, a color liquid crystal display has a predetermined gap (cell gap) G as shown in FIGS.
Matrix substrate 51 and color filter substrate 52
Are opposed to each other, and liquid crystal is sealed in the cell gap G. Usually, both substrates are formed of glass plates. At this time, if it is a three-terminal type as shown in FIG. 13, the matrix substrate 51 and the color filter substrate 52 are cut to predetermined dimensions so as to leave three edges of the matrix substrate 51, and A plurality of electrodes 53 from both substrates are formed on the periphery. A film-like electrode is joined as a connection wiring to these electrodes 53. However, since this kind of film electrode is extremely thin and thin, it is easily broken at a sharp edge portion of the matrix substrate 51. Therefore conventionally, the polishing for chamfering the edge of the matrix substrate 51 or the like (shown by R ₁₎ is being performed.

As a method of polishing a three-terminal type glass plate, for example, Japanese Patent Application Laid-Open Nos.
There is a polishing apparatus disclosed in Japanese Patent No. 16960. The former polishing apparatus fixes the object to be polished to a table that moves in the X-axis direction, and allows the polishing head to move in the Y-axis direction.
The polishing head is swingable about a support point of the polishing head. When polishing the edge parallel to the X axis, the table is moved in the X axis direction after fixing the polishing head at a predetermined position on the Y axis, and when polishing the edge parallel to the Y axis direction. Is configured to move the polishing head in the Y-axis direction after fixing the table at a predetermined position on the X-axis. At this time, the polishing head is moved so that the polishing portion of the polishing head faces the edge to be polished. Shake your head in the prescribed direction. In the latter polishing apparatus, the table is fixed, and the polishing head is movable in the X-axis and Y-axis directions. The polishing head is moved so as to follow the periphery of the object to be polished, and Perform polishing.

[0004]

However, polishing by the above two polishing apparatuses has the following problems. (1) Accurate control is required to move the polishing head two-dimensionally according to the edge to be polished, and furthermore, it is necessary to adjust the position of the polishing head one by one by exchanging or wearing a polishing grindstone. Because of this, its position adjustment is even more difficult. (2) When the time required for polishing one side is x, 3
In the case of the three-terminal type that requires polishing of the periphery, at least 3x time is required, and in the case of the four-terminal type, 4x time is required. (3) When polishing LCD glass, only pure water can be used so as not to cause damage, and even a water-soluble coolant cannot be used. On the other hand, below the table and the polishing head, a drive mechanism and a guide rail for driving them are provided, and since this type of device is usually used in a clean room, lubrication cannot be performed, and therefore, ,
Since the precision mechanism may rust and reduce the polishing accuracy, it is necessary to waterproof the drive mechanism and the guide rail. However, in the above-described apparatus, the polishing head performs complicated movements, and in order to follow the movement, complete elasticity is required, which requires a contractible elastic member and a bellows mechanism, but such members are generally expensive. It has a short life. The present invention has been made in order to solve the above-described problems, and has an object to provide a glass polishing apparatus that can shorten a polishing processing time while being a simple mechanism, and that can obtain complete waterproofing. I do.

[0005]

According to a first aspect of the present invention, there is provided a glass polishing apparatus for polishing an edge of a glass plate, comprising: a table on which a glass plate to be polished is mounted; A plurality of units each having positioning means for adjusting to the reference position of (1) and fixing means for fixing the positioned glass plate to the polishing table; and a plurality of units being linearly spaced at a constant interval L. A connecting member for connecting the units to each other; moving means for moving each unit to a shift position separated by L in the downstream direction from the original home position and returning to the home position; and moving each unit from the home position to the shift position. A plurality of polishing means provided to simultaneously polish one edge of a glass plate on a table of each unit when moved; and each unit at a shift position to a home position. Glass plate rotating means for lifting the glass plate in each unit at the shift position and mounting the glass plate on the table of each unit returned to the home position while rotating the glass plate by 90 °. It is characterized by the following.

According to a second aspect of the present invention, there is provided a glass polishing apparatus for polishing an edge of a glass plate, comprising a plurality of fixed tables provided linearly at predetermined intervals, and a glass plate mounted on each table. Positioning means for adjusting the position of the glass plate to the reference position, fixing means for fixing the positioned glass plate to the table, and polishing for simultaneously polishing one edge of each fixed glass plate on each table by moving in the upstream direction. Means and transport means for moving each polished glass plate on each table to a subsequent table in a state rotated by 90 °.

According to a third aspect of the present invention, there is provided a glass polishing apparatus for polishing an edge of a glass plate, comprising a plurality of fixed tables linearly provided at predetermined intervals, and a glass plate placed on each table. Positioning means for adjusting the position of the glass plate to the reference position, fixing means for fixing the positioned glass plate to the table, and polishing for simultaneously polishing one edge of each fixed glass plate on each table by moving in the upstream direction. Means and the polishing means are moved together, and when the polishing means moves in the downstream direction, each polished glass plate on each table is moved to 9
Transport means for moving to a subsequent table in a state of being rotated by 0 °.

[0008]

In the polishing apparatus of the first invention, a required number of units are connected to each other using a connecting member, and if one unit is moved by the moving means, all the units move together. . When each unit is moved from the original home position to the shift position, one edge of each glass plate positioned on each table is simultaneously polished by the polishing means during the movement. In the shift position, each unit is located at the position of each unit one stage downstream. In this shift position, each unit returns to its original home position while the glass plate is being lifted by the glass plate rotating means, and then the lifted glass plate is at the home position after being rotated 90 °. It is placed on the table of each unit. As described above, when one edge of each glass plate is polished at the same time by the polishing machine, each glass plate is rotated by 90 ° and is fed to the subsequent stage. The edges can be polished. In this device,
By having the number of units equal to the number of polishing of the margin,
With the time x for polishing one edge, a glass plate having three or four edges polished can be obtained, and the tact time can be x regardless of the number of edges to be polished.

According to the second aspect, when the glass plate is set on the table, the glass plate is immediately placed on the table at that time.
Both corners of the edge to be polished can be polished by the corner polishing means, and thereafter, the edge of the glass plate is polished by moving each unit. According to this polishing method, the processing time can be greatly reduced as compared with the case where a separate corner polishing step is provided.

In the second invention, the table is fixed, and when the polishing machine moves from the home position to the shift position in the upstream direction, one edge of the glass plate set on each table is simultaneously polished, so that each polished glass plate is polished. Is 90
It is set on each table one stage downstream while being rotated, and the next edge is polished on each glass sheet when the polishing machine moves from the home position to the shift position again.

[0011] In the above device, as in claim 4,
If the polishing is performed even when the polishing machine returns from the shift position to the home position, the step of returning the polishing machine to the home position after polishing can be omitted, and the required tact time can be reduced.

A third invention is different from the apparatus of the second invention in that the polishing machine and the transfer machine are individually controlled, but both are integrally provided and the polishing machine and the transfer machine are simultaneously driven. In addition, the required tact time can be similarly reduced by reducing the number of drive steps.

The waterproof cover according to the sixth aspect may be a simple plate material that does not require a contractible elastic member or a bellows mechanism. This waterproof cover may be the connecting member itself in the device according to the first or second aspect.

[0014]

FIG. 1 is a front view showing an embodiment of the apparatus of the first invention, FIG. 2 is a side view, and FIG. 3 is a plan view. Two guide rails 3 are provided on the gantry 1 in parallel via appropriate members 2 (shown in FIG. 2). Along the guide rail 3, a movable base 5 of the unit 4 (referred to as a parent unit) is provided so as to be movable, and movable bases 8 and 9 of the units 6 and 7 (referred to as a child unit) are also provided on the guide rail 3. And the moving table 8 is subordinately coupled to the moving table 5 by a connecting plate 10 at a position L away from the moving table 5 in the downstream direction (right direction in the drawing). Mobile platform 9
Is connected to the moving table 8 at a position L away from the moving table 8 by a connecting plate 11. These connecting plates 1
As shown in FIG. 2, appropriate drainers 12 are provided on both sides of the guide rails 0 and 11 in order to provide the guide rails 3 and the like with a waterproof cover.

A ball screw 14 is provided on the gantry 1 so that the ball screw 14 is rotatable in the moving direction of each moving table. Reference numeral 15 denotes a motor for rotating the ball screw 14. The ball nut 16 screwed into the ball screw 14 is
When the ball screw 14 rotates, the ball nut 16 moves in the left-right direction in the figure, thereby holding the moving table 5 and the moving table 5. 8 and 9 move together on the guide rail 3. A bendable waterproof cover 18 is provided at the other end of the movable base 5 and the movable base 9, and a weight 19 is attached to the other end of the waterproof cover 18.

Tables 21, 22, and 23 for mounting the glass plate Q are provided on the movable tables 5, 8, and 9, respectively. In FIG. 1, the parent unit 4 and the child units 6 and 7 are at their respective home positions. The glass plate Q is sucked and lifted just above the table of the child units 6 and 7 at the home position, and rotated 90 degrees. After that, in order to descend and release the glass plate Q, a glass plate rotating device 26 having a suction plate 24 and a rotating shaft 25 is provided.
As shown in FIG. 3, the air cylinder 27 can be moved up and down in the figure (in FIG. 1, up and down with respect to the plane of the paper) so that it can rotate around the center of the glass plate Q.

[0017] as a positioning means for aligning the reference position of the glass plate Q placed on each table 21, 22, 23, as shown in FIG. 3, grinding the edge q ₁ is polished glass plate Q Two locking pins 2 for locking to the line
8 and 29, and by 90 ° counterclockwise rotation of the glass plate Q provided with a locking pin 30 for locking at specified lines limbic q ₂ to be polished to the next, the two glass plates Q There are provided pressing pins 31 and 32 for pressing the two edges q ₁ and q ₂ against the two lines. The pin 32 may be a locking pin, the pin 30 may be a pressing pin, or a center alignment method (a method of pressing the same dimension from both sides) linked to the same drive source may be used. Further, each table is provided with suction fixing means (not shown) for sucking the glass plate Q so that the glass plate Q positioned by these pins can be fixed to each table. When the glass plate Q is fixed to the table by this suction fixing means, each pin escapes obliquely downward. In this apparatus, only the locking pins 28 and 29 escape during polishing, and other pins escape. Pins 30, 31,
Reference numeral 32 denotes a configuration that does not escape until the polishing is completed. With such a configuration, the suction and fixing of the glass plate Q by the suction and fixing means is further ensured (especially when the glass plate Q is small, the suction area is not so small, which is useful). The locking pins 28 to 29 are attached to each table 21.
To to be locked in a precise position corresponding to the size of the to Q ₃ with no glass plate Q ₁ is placed on 23, so that can change their installation positions manually for each table.

As shown in FIG. 3, when the glass plate Q on the table is fed downstream, the locking pins 28, 2
9 so that it can polish the edge q ₁ of locked and the glass plate Q in, approximately in the middle between the units, grinding machine consists of a spindle motor 33B for driving the grinding wheel 33A and this 34,35,36 Is provided. These polishers 34 to 36 can move the polishers vertically in the drawing in correspondence with the above-mentioned polishing line so that a predetermined amount of polishing can be performed.

[0019] Also, for polishing both corners in edge q ₁ parent unit 4 and the second child unit 7 glass plate Q ₁ which is placed on the table 21, 23, Q ₃ in the home position Corner polishing machines 37, 38 (FIGS. 1 and 2)
(Not shown).

FIG. 4 shows the units 4, 6, and 7 of FIG. 1 having moved from the home position to the shift position. In this state, the table 21 of the parent unit 4 and the first child unit 6 are moved. The glass plate rotating device 26 will be located on 22.

Next, the operation of the apparatus having the above configuration will be described with reference to FIG. In addition, in FIG. 5, with respect to the glass plate Q,
The unpolished margin is indicated by a double broken line, and the polished margin is indicated by a solid line. (A) in FIG. 5: is a glass plate Q ₃ in the table 21 of the parent unit 4 at the home position are supplied. Supplied glass plate
(In this case, the glass plate Q ₃ only) is aligned with the locking pin, it is fixed in its position. At this time, if necessary, the corner polisher 37 causes the edge q ₁ of the glass plate Q _3.
Corners are polished. In FIG. 5 (B): each unit is moved from the home position to the shift position, during this movement, the edge of the glass sheet Q ₃ is polished. FIG. 5C: The glass plate Q on each of the shifted polishing tables
_After the table ₃ is released from being fixed to the table, it is lifted and rotated 90 ° by the glass plate rotating means, and during this operation, each unit is returned from the shift position to the home position. Figure 5 (D): on the table 22 for each child unit that has returned to the home position, the glass plate Q ₃ which has lifted a glass plate rotating means is mounted, the parent unit 4 Table 2
Glass plate Q ₂ to which then polished on 1 is placed, a glass plate Q _3, Q ₂ is aligned and fixed. Corner of the glass plate Q ₂ is polished by the corner sander 37 if necessary at this point. FIG. 5E: Each unit is moved from the home position to the shift position, and during this movement, the edges of the glass plates Q ₃ and Q ₂ are polished. FIG. 5F: Glass plates Q ₃ and Q on each of the shifted polishing tables.
₂ is lifted and rotated 90 ° by the glass plate rotating means, and during this operation, each unit is returned from the shift position to the home position. FIG. 5 (G): The glass plates Q ₃ and Q ₂ lifted by the glass plate rotating means are placed on the tables 22 and 23 of the respective child units returned to the home position, and the table of the parent unit 4 is placed. glass plate Q ₁ which then polished on 21 is placed, to those without the glass plate Q ₁ Q ₃ is fixed after alignment. If necessary at this time, a corner of the glass plate Q ₁ is polished by a corner polisher 37, also corner of the glass plate Q ₃ is polished by corner polisher 38, thereby, the glass plate Q ₃ are square corners Has been polished. FIG. 5H: Each unit is moved from the home position to the shift position, and during this movement, the edges of the glass plates Q ₁ to Q ₃ are polished. At this point, three edges of the glass plate Q ₃ are polished, and the glass plate Q ₃ is conveyed to the next step by an unloading device or the like, and thereafter, (F) to (H) of FIG. 5 are repeated. By doing
During the polishing process for one edge, the glass plates having the three edges polished are carried out one by one, so that the processing time is reduced by one in comparison with the conventional machine.
/ 3 times.

FIG. 6 is a front view showing an embodiment of the apparatus according to the second invention, FIG. 7 is a side view, and FIG. 8 is a plan view. Four tables 53, 54, 55, 56 are fixedly provided on the gantry 51 via a suitable member 52 at regular intervals. On the other hand, the glass plates Q are set on these tables 53 to 56, and can be integrally moved along the guide rails 57 so that each set glass plate Q can be transferred to a table in the downstream (right side in the figure) direction. The three transfer devices 58, 59, and 60 are provided. The positions of the transporters 58, 59, and 60 shown in FIG. 8 are called home positions, and 58 'indicates the position of the transporter 58 when each transporter is shifted in the upstream (left side in the figure) direction. This position is called a shift position. Each of the transporters 58 to 60 lifts the glass plate Q sucked by the pads 61 by four pads 61 for sucking the glass plate Q set on the table, and moves the lifted glass plate Q by an arrow ( FIG. 8) A glass plate rotating device 62 for turning 90 ° in the direction is provided, and the table 5
The glass plate Q set at 3 to 55 can be slid in the horizontal direction (up and down direction in FIG. 8) so that the edge to be polished always touches the polishing machine described later. .

Three polishers 63, 64, 65 are arranged along a guide rail 66 at predetermined intervals so that one edge of each glass plate Q set on the tables 53 to 55 can be simultaneously polished. It is provided so as to be integrally movable.
The three polishing machines 63 to 65 have a mechanism capable of adjusting the movement indicated by the arrow in FIG. 8 so that the polishing positions are aligned. In addition, these polishing machines 63 to 65
Is in the home position shown in FIG. 8 in the standby state, and grinds one edge of the glass plate Q on the tables 53 to 55 in the process of moving these polishing machines 63 to 65 to the shift position in the upstream direction. Reference numeral 67 denotes a locking pin for positioning the edge of the glass plate Q to be polished on the table, and this pin 67 has a mechanism to escape downward during polishing. 68 (FIG. 7) is a waterproof cover.

Next, the polishing operation of the apparatus having the above configuration will be described with reference to FIG.
This will be described with reference to FIG. In FIG. 9, the unpolished edge of the glass plate Q is indicated by a broken line, and the polished edge is indicated by a solid line.

First, the transporters 58 to 60 and the polishers 63 to 65 are both at their home positions. In this state, the glass plate Q ₄ is supplied to the first table 53 at the most upstream position, When set to, by suction through a suction hole (not shown) in the table 53,
Glass plate Q ₄ are fixed to the table 53. FIG. 9 (A)
Shows a state in which the transporters 58 to 60 have been moved to the shift position thereafter.

Next, as shown in FIG.
To 65 moves from the home position to the shift position, the first side edge of the glass plate Q ₄ on the table 53 is polished in the process.

Next, after the fixing of the glass plate Q ₄ to the table 53 is released, the glass plate Q ₄ is sucked by the transfer device 58 and lifted upward. Then, as shown in (C) of FIG. 9, the conveyer 58 to 60 by moving to the home position, the glass plate Q ₄ which has been lifted is transported while being rotated 90 ° in the direction of the arrow shown, second At the same time as the first table 53
Glass plate Q ₃ to the next polishing is set to.

[0028] The to no polishing machine 58 from a state that 60 moves again to the shift position, as shown by (D) in FIG. 9, the second side edges are polished for the glass plate Q _4, glass for Q ₃ is polished first side edge, then, to not transfer machine 58 60 is moved to the shift position.

In the same manner, each of the glass plates Q fed to the subsequent stage while being rotated by 90.degree.
9 is polished at the time of moving to the shift position of 0, and FIG.
In (F), the glass sheet Q ₄ supplied first is polished at the third edge on the third table 55, and the glass sheet Q 4
₄ is transferred from the fourth table 56 to another processing step by a carrying-out device (not shown), as shown in FIGS.

In the apparatus according to the second aspect of the invention, three edges are polished. However, when four edges are polished, one polishing machine and one table may be added. In this case, the fourth table does not require a locking pin or a glass plate rotating mechanism. In this apparatus, as described with reference to FIG. 9, all the processes are sequence controlled. However, individual control such as individually driving only the polishing machine can be performed.
All can be controlled manually. In addition, in this apparatus, the glass plate is polished when the polishing machine moves from the home position to the shift position (one-way polishing), but can also be polished when returning from the shift position to the home position (reciprocating polishing), The polishing operation in that case will be described with reference to FIG.

As shown in FIG. 10A, the transporters 58 to 60 and the polishers 63 to 65 are both at their home positions, and in this state, the glass plate Q is placed on the first table 53.
₄ is set.

Next, as shown in FIG.
When 3 to 65 move to the shift position, the glass plate Q ₄
Are polished on the first edge of the conveyors 58 to 6
0 also moves to the shift position.

Next, as shown in FIG.
According to 8, the glass plate Q ₄ is set on the second table 54 while turning 90 °, and at the same time, the glass plate Q ₃ to be polished next is set on the table 53.

Next, as shown in FIG.
When returning from 3 to 65 to the home position, relative to the glass plate Q ₄ is polished second side edge, a first side edge are polished for the glass plate Q _3. Then, the transporters 58 to 60 move to the shift position.

Similarly, each of the glass plates fed to the subsequent stage while being rotated by 90 ° is polished by a grinder 63 to 65.
When moving from the home position to the shift position or from the shift position to the home position, the edge of the glass plate Q is polished, and the polishing machine moves from the home position to the shift position as described in FIG. If the glass plate Q is polished, the step of returning to the home position is omitted, so that the required process time can be further reduced.

FIG. 12 is a plan view showing an embodiment of the device according to the third invention. In the second invention, the transporter and the polishing machine are separately provided and can be moved individually.
In this case, three transporters 58 to 60 and polishers 63 to 65 are alternately connected to each other so as to be integrally movable along a guide rail 66. The polishing operation in this case is shown in FIG.
This will be described with reference to FIG.

[0037] First, as shown in FIG. 12 (A), conveyor 58 through and polisher 63 to 65 is in the home position, the glass plate Q ₄ is set in this state in the first table 53 You.

Next, as shown in FIG. 12 (B), when the transporter and the polishing machine move to the shift position, the table 53 is moved.
First side edge of the glass plate Q ₄ above is polished. The next time the transport machine and polishing machine returns to the home position, by this conveyor, the glass sheet Q ₄ is transferred to the second table 54 while rotating 90 °.

[0039] Then, as shown in (D) in FIG. 12, when the conveying machine and polishing machine is moved back to the shift position, the second side edges are polished for the glass plate Q _4, a glass plate Q _{For 3} , the first edge is polished.

In this case as well, one edge of each table is polished at the same time in the same manner.
In the one-way polishing shown in FIG. 9, this corresponds to a case where the transporter and the polishing machine are simultaneously moved.

[0041]

As described above, in the polishing apparatus of the present invention, one edge of each glass plate set on a plurality of tables is simultaneously polished by the polishing machine, and the polished glass plate is transported by the transfer machine. Since it is rotated 90 ° and fed simultaneously to the subsequent stage, the time required to polish one edge is 3 edges (when the number of tables is 3) or 4 edges (when the number of tables is 4) Can be polished, and the polishing rate can be greatly improved. In addition, since the number of tables can be easily increased or decreased according to the number of edges to be polished, an accurate system can be constructed according to the material to be polished, and can be easily applied to an automated line. Further, in the present apparatus, since the distance between the units or the tables is invariable, it is easy to install a waterproof cover necessary for a gap between them, and an inexpensive plate can be used.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a glass polishing apparatus according to the first invention.

FIG. 2 is a side view of the apparatus of FIG. 1 as viewed from the side.

FIG. 3 is a plan view of the apparatus of FIG. 1;

FIG. 4 is a front view of the apparatus shown in FIG. 1 when the table is moved rightward;

FIG. 5 is a view showing a series of polishing operations in the apparatus of FIG. 1;

FIG. 6 is a front view showing an embodiment of the glass polishing apparatus of the second invention.

7 is a side view of the device of FIG. 6 as viewed from the side.

8 is a plan view of the apparatus of FIG.

FIG. 9 is a view showing a series of polishing operations in the apparatus of FIG. 6;

FIG. 10 is a diagram showing a series of polishing operations when reciprocating polishing is performed in the apparatus of FIG. 6;

FIG. 11 is a plan view showing one embodiment of the glass polishing apparatus of the third invention.

FIG. 12 is a view showing a series of polishing operations in the apparatus shown in FIG. 11;

FIG. 13 is a plan view showing a liquid crystal display having a three-terminal structure.

14 is a cross-sectional view of the liquid crystal display of FIG. 13 taken along line AA ′.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stand 3 Guide rail 4 Parent unit 5 Moving table 6 Child unit 7 Child unit 8 Moving table 9 Moving table 10 Connecting plate 12 Drainer 14 Ball screw 16 Ball nut 18 Waterproof cover 21 Table 26 Glass plate rotating device 28 Locking pin 30 Lock Pin 31 pressing pin 34 polishing machine 37 corner polishing machine 51 gantry 52 member 53 table 57 guide rail 58 transfer device 61 pad 62 glass plate rotating device 63 polishing machine 67 locking pin 68 waterproof cover Q glass plate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-188661 (JP, A) JP-A-59-47152 (JP, A) JP-A-53-124395 (JP, A) 81265 (JP, U) Japanese Utility Model Showa 60-142058 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B24B 9/00 601 B24B 9/10

Claims (7)

(57) [Claims] 1. A glass polishing apparatus for polishing an edge of a glass plate, comprising: a table on which the glass plate to be polished is mounted; and a positioning for positioning the glass plate mounted on the table to a predetermined reference position. A plurality of units each comprising: means, fixing means for fixing the positioned glass plate to the polishing table; and a connection for mutually connecting the plurality of units linearly at a constant interval L. Components;
Moving means for moving each unit to a shift position separated by L in the downstream direction from the original home position and returning to the home position; and a table for each unit when each unit is moved from the home position to the shift position. A plurality of polishing means provided to polish one edge of the upper glass plate at the same time; before returning each unit at the shift position to the home position, lifting the glass plate at each unit at the shift position, A glass plate rotating means for mounting the glass plate on the table of each unit which has been returned to a state rotated by 90 °. 2. The glass polishing apparatus according to claim 1, further comprising a corner polishing means for polishing a corner at an edge to be polished of the glass plate set on each table. 3. A glass polishing apparatus for polishing an edge of a glass plate, comprising: a plurality of fixed tables provided linearly at predetermined intervals; and a glass plate mounted on each table Positioning means for adjusting the position of the glass plate to the reference position; fixing means for fixing the positioned glass plate to the table; and polishing for simultaneously polishing one edge of each fixed glass plate on each table by moving in the upstream direction. A glass polishing apparatus comprising: means for transporting each polished glass plate on each table to a subsequent table while rotating each glass plate by 90 °. 4. The glass polishing apparatus according to claim 3, wherein said polishing means performs polishing when moving in a downstream direction. 5. A glass polishing apparatus for polishing an edge of a glass plate, comprising: a plurality of fixed tables provided linearly at predetermined intervals; and a glass plate placed on each table Positioning means for adjusting the position of the glass plate to the reference position; fixing means for fixing the positioned glass plate to the table; and polishing for simultaneously polishing one edge of each fixed glass plate on each table by moving in the upstream direction. Means, move integrally with the polishing means, and when the polishing means moves in the downstream direction, each polished glass plate on each table is rotated by 90 °.
A glass polishing apparatus, comprising: transport means for moving each of the rotating tables to a subsequent table. 6. The glass polishing apparatus according to claim 1, further comprising a waterproof cover between the tables and / or between the polishing machines. 7. The glass polishing apparatus according to claim 1, wherein the connecting member also serves as a waterproof cover.