JPH05185360A - Glass polishing device - Google Patents

Abstract

PURPOSE:To polish the edges of glass plate quickly by lifting glass plates placed on units in the shift position before the units are returned to their home position, and placing the glass plates on tables of the returned units in the condition that the glass plates are rotated 90 deg. using a glass plate rotating means. CONSTITUTION:Units 4, 6, 7 are moved from their home position to the shift position, and meantime one-side edges of the glass plates located on tables 21-23 are ground simultaneously by a grinding means. In the shift position, the units are positioned in the positions of units one step downstream, where they return to the home position while glass plates Q are lifted by a glass plate rotating means 26, and thereafter the lifted glass plates are placed on the tables of respective units which are situated in the home position while taking the, 90 deg. rotated attitude. In this manner, one-side edges of glass plates are ground simultaneously by a grinding machine.

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 in 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.
The matrix substrate 51 and the color filter substrate 52 are separated from each other.
Are opposed to each other and liquid crystal is sealed in the cell gap G, and both substrates are usually formed of glass plates. At that time, in the case of a three-terminal type as shown in FIG. 13, the matrix substrate 51 and the color filter substrate 52 are cut into predetermined dimensions so that the three edges of the matrix substrate 51 are left, and the matrix substrate 51 is cut. A plurality of electrodes 53 are formed on both sides of the substrate. Film electrodes are joined as connection wirings to these electrodes 53, but since film electrodes of this kind are extremely thin and thin, they are easily broken at the sharp edge portions of the matrix substrate 51. Therefore, conventionally, polishing is performed for chamfering the edge of the matrix substrate 51 and the like (shown by R ₁ ).

As a method of polishing a three-terminal type glass plate, for example, JP-A-62-244643 and 63-63
There is a polishing apparatus disclosed in Japanese Patent Publication No. 16960. The former polishing apparatus fixes an object to be polished on a table that moves in the X-axis direction, allows the polishing head to move in the Y-axis direction, and
It is provided so that it can swing around the support point of the polishing head. When polishing the edge parallel to the X-axis, the polishing head is fixed at a predetermined position on the Y-axis, the table is moved in the X-axis direction, and the edge parallel to the Y-axis direction is polished. Fixes the table at a predetermined position on the X axis and moves the polishing head in the Y axis direction. At that 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 desired 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 peripheral edge of the object to be polished, and the peripheral edge is moved. Perform polishing.

[0004]

However, the 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 in addition, it is necessary to adjust the position of the polishing head one by one by exchanging the polishing grindstone or wearing. Because of this, it is more difficult to adjust the position. (2) If the time required to polish one side is x, then 3
The 3-terminal type, which requires edge polishing, requires at least 3x hours, and the 4-terminal type requires 4x hours, which makes processing speed difficult. (3) When polishing LCD glass, only pure water can be used so as not to damage it, and even water-soluble coolant cannot be used. On the other hand, below the table and the polishing head, there are provided a drive mechanism and a guide rail for driving them, and this type of device is usually used in a clean room and therefore cannot be refueled. ,
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-mentioned apparatus, the polishing head moves in a complicated manner, and in order to follow the movement to obtain complete waterproofness, a retractable elastic member and a bellows mechanism are required, but such a member is generally expensive. Yes, the life is short. The present invention has been made in order to solve the above-described problems, and an object thereof is to provide a glass polishing apparatus that has a simple mechanism, shortens the polishing processing time, and can obtain complete waterproofing. To do.

[0005]

According to a first aspect of the present invention, there is provided a glass polishing apparatus for polishing a peripheral edge of a glass plate, a table on which the glass plate to be polished is placed, and a glass plate placed on the table. A plurality of units, each of which has a positioning means for adjusting to the reference position and a fixing means for fixing the positioned glass plate to the polishing table; And a moving member for moving each unit to a shift position separated from the original home position in the downstream direction by L and returning to the home position; and a unit for moving each unit from the home position to the shift position. A plurality of polishing means provided to simultaneously polish one edge of the glass plate on the table of each unit when moved; each unit in the shift position to the home position The glass plate rotating means for lifting the glass plate in each unit in the shift position and placing the glass plate on the table of each unit which has returned to the home position in a state of being rotated by 90 °. It is characterized by

A glass polishing apparatus for polishing a peripheral edge of a glass plate according to a second aspect of the present invention comprises a plurality of fixed tables linearly provided at predetermined intervals and a glass plate placed on each table. And a fixing means for fixing the positioned glass plate to the table, and a polishing means for simultaneously polishing one edge of each fixed glass plate on each table by moving in the upstream direction. And means for moving the polished glass plate on each table to the subsequent table in a state of being rotated by 90 °.

A glass polishing apparatus for polishing the edge of a glass plate according to a third aspect of the present invention comprises a plurality of fixed tables linearly provided at predetermined intervals, and a glass plate placed on each table. And a fixing means for fixing the positioned glass plate to the table, and a polishing means for simultaneously polishing one edge of each fixed glass plate on each table by moving in the upstream direction. Means and the polishing means, and when the polishing means moves in the downstream direction, each polished glass plate on each table is
Transporting means for moving each table to the subsequent stage in a state of being rotated by 0 °.

[0008]

In the polishing apparatus according to the first aspect of the present invention, the required number of units are connected to each other using the connecting member, and when one unit is moved by the moving means, all the units are moved 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. At the shift position, each unit is located at the position of each unit one stage downstream. At 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 in a state of being rotated by 90 °. It is placed on the table of each unit. In this way, when one edge of each glass plate is simultaneously polished by the polishing machine, each glass plate is rotated by 90 ° and fed to the subsequent stage. It can be polished against the edges. With this device,
By equipping the number of units equal to the number of edge polishing,
With the time x for polishing one edge, a glass plate with 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, at that point, immediately,
Both corners of the edge to be polished can be polished by the corner polishing means, and then the edges of the glass plate are polished by moving each unit. According to this polishing method, the processing time can be greatly shortened as compared with the case where a corner polishing step is separately provided.

According to the second aspect of the present 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 and each polished glass plate. 90 depending on the carrier
The table is set on the downstream table one stage in a rotated state, and when the polishing machine moves from the home position to the shift position again, the next edge of each glass plate is polished.

According to a fourth aspect of the present invention,
If 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 takt time can be shortened.

According to a third aspect of the invention, in the apparatus of the second aspect, the polishing machine and the carrier are individually controlled, but both are integrally provided and the polishing machine and the carrier are driven simultaneously. Therefore, the required tact time can be similarly shortened by reducing the driving steps.

Since the waterproof cover according to the sixth aspect may be a simple plate member that does not require a retractable elastic member or a bellows mechanism, it is inexpensive and has a long life. The waterproof cover may be the connecting member itself in the device according to the first or second aspect.

[0014]

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 in parallel on a pedestal 1 with a suitable member 2 (shown in FIG. 2) interposed therebetween. A movable base 5 of a unit 4 (referred to as a parent unit) is movably provided along the guide rail 3, and movable bases 8 and 9 of units 6 and 7 (referred to as a child unit) are also mounted on the guide rail 3. Is provided so as to be movable, and the movable table 8 is subordinately coupled to the movable table 5 by a connecting plate 10 at a position separated by L in the downstream direction (right direction in the drawing) from the movable table 5, and similarly, Mobile stand 9
Is connected to the moving table 8 at a position separated from the moving table 8 in the downstream direction by a connecting plate 11. These connecting plates 1
0 and 11 are provided with appropriate drainers 12 on both sides as shown in FIG. 2 in order to serve as a waterproof cover for the guide rails 3 and the like.

A ball screw 14 is provided on the gantry 1 so as to be rotatable in the direction of movement of each movable table, and 15 is a motor for rotating the ball screw 14. The ball nut 16 screwed onto the ball screw 14 is provided on the moving table 5
Since it is held so as to restrain the rotation by the member 17 fixed to the lower surface of the ball nut 16, when the ball screw 14 rotates, the ball nut 16 moves in the left-right direction in the drawing, whereby the moving table 5 and the moving table are moved. 8 and 9 move together on the guide rail 3. A bendable waterproof cover 18 is provided at the other ends of the movable table 5 and the movable table 9, and a weight 19 is attached to the other end of the waterproof cover 18.

Tables 21, 22 and 23 on which the glass plate Q is placed are respectively provided on the movable tables 5, 8 and 9. Further, in FIG. 1, the parent unit 4 and the child units 6 and 7 are in their respective home positions, and the glass plate Q is sucked and lifted immediately above the table of the child units 6 and 7 in the home position and rotated by 90 °. Then, 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 in the vertical direction in the figure (vertical direction with respect to the paper surface in FIG. 1) so that it can rotate at the center of the glass plate Q.

As a positioning means for aligning the glass plate Q placed on each table 21, 22, 23 with the reference position, as shown in FIG. 3, the edge q ₁ to be polished of the glass plate Q is polished. Two locking pins 2 for locking to the line
8, 29, and a locking pin 30 for locking the edge q ₂ to be polished next by a 90 ° counterclockwise rotation of the glass plate Q at a specified line. It is provided with 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 and the pin 30 may be a pressing pin, or may be a centering system (a system of pressing with equal dimensions from both sides) linked to the same drive source. 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 the suction fixing means, each pin has a structure that escapes obliquely downward. However, in this device, only the locking pins 28 and 29 escape during polishing and other pins are released. Pins 30, 31,
The structure 32 does not escape until the end of polishing. With this structure, the suction fixing of the glass plate Q is further ensured by the suction fixing means (especially when the glass plate Q is small, the suction area is not small, which is useful). In addition, the locking pins 28 to 29 are used for 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.

Further, as shown in FIG. 3, when the glass plate Q on the table is fed in the downstream direction, the locking pins 28, 2 are provided.
In order to be able to polish the edge q ₁ of this glass plate Q locked by 9, the polishing machines 34, 35, 36, which consist of a wheel 33A and a spindle motor 33B for driving the wheel 33A, are approximately at the center between the units. Equipped with. These polishing machines 34 to 36 are movable in the up-down direction in the figure in correspondence with the above-mentioned polishing line so that a predetermined amount of polishing can be performed.

Further, for polishing both corners at the edge q ₁ of the glass plates Q ₁ , Q ₃ placed on the tables 21, 23 of the parent unit 4 and the second child unit 7 in the home position. Corner polishing machines 37, 38 (see FIGS. 1 and 2)
(Not shown).

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

Next, the operation of the apparatus having the above structure will be described with reference to FIG. In addition, in FIG. 5, with respect to the glass plate Q,
The unpolished edges are shown by double dashed lines and the polished edges are shown by solid lines. FIG. 5A: The glass plate Q ₃ is supplied to the table 21 of the parent unit 4 at the home position. Glass plate supplied
(In this case, only the glass plate Q ₃ ) is aligned by the locking pin and fixed at that position. If necessary at this point, the corner grinder 37 is used to remove the edge q ₁ of the glass plate Q _3.
Corners are polished. FIG. 5B: Each unit is moved from the home position to the shift position, and the edge of the glass plate Q ₃ is polished during this movement. FIG. 5C: Glass plate Q on each shifted polishing table
_{After the 3} is unfixed to the table, it is lifted by the glass plate rotating means and rotated 90 °, and during this operation, each unit is returned from the shift position to the home position. 5D: The glass plate Q ₃ lifted by the glass plate rotating means is placed on the table 22 of each child unit that has returned to the home position, and the table 2 of the parent unit 4 is placed.
A glass plate Q _{2 to} be polished next is placed on the glass plate 1, and the glass plates Q ₃ and Q ₂ are aligned and fixed. At this time, if necessary, the corner of the glass plate Q ₂ is ground by the corner grinder 37. FIG. 5E: Each unit is moved from the home position to the shift position, and the edges of the glass plates Q ₃ and Q ₂ are polished during this movement. FIG. 5F: Glass plates Q ₃ and Q on each of the shifted polishing tables
₂ is lifted by the glass plate rotating means and rotated 90 °, and during this operation, each unit is returned from the shift position to the home position. (G) of FIG. 5: 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 that have returned to the home position, and the table of the parent unit 4 is placed. A glass plate Q _{1 to} be ground next is placed on the glass plate 21, and these glass plates Q ₁ to Q ₃ are 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 the edges of the glass plates Q ₁ to Q ₃ are polished during this movement. At this point, the glass plate Q ₃ has its three edges polished, and the glass plate Q ₃ is conveyed to the next step by a carry-out device or the like, after which (F) to (H) in FIG. 5 are repeated. By
During the process of polishing one edge, the glass plates whose three edges have been polished are carried out one by one, so the processing time is 1% compared with the conventional machine.
It can be tripled.

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, and 56 are fixedly provided on the pedestal 51 via appropriate members 52 at regular intervals. On the other hand, the glass plates Q are set on these tables 53 to 56, and the set glass plates Q can be integrally moved along the guide rails 57 so that they can be transferred to the tables in the downstream (right side in the figure) directions. Three transfer machines 58, 59, 60 are provided. The positions of the carriers 58, 59, 60 shown in FIG. 8 are referred to as home positions, and 58 ′ indicates the position of the carriers 58 when each carrier 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 four pads 61 for sucking the glass plate Q set on the table, the glass plate Q sucked by the pads 61 upward, and the lifted glass plate Q is indicated by an arrow ( (FIG. 8) Glass table rotating devices 62 for turning 90 ° in each direction, and the table 5
The edges to be polished with respect to each glass plate Q set to 3 to 55 are slidable in the horizontal direction (vertical direction in FIG. 8) so as to always contact the polishing machine described later. .

Three polishing machines 63, 64, 65 are arranged along the guide rail 66 with a predetermined interval 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 movable integrally.
A mechanism for adjusting movement is shown by arrows in FIG. 8 so that the polishing positions of these three polishing machines 63 to 65 are aligned. Also, these polishing machines 63 to 65
Is in the home position shown in FIG. 8 in the standby state, and one edge of the glass plate Q on the tables 53 to 55 is polished in the process in which the polishing machines 63 to 65 move to the shift positions in the upstream direction. 67 is 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, FIG. 9 shows the polishing operation of the apparatus having the above structure.
Will be explained. In FIG. 9, the glass plate Q has unbroken edges indicated by broken lines and polished edges indicated by solid lines.

Initially, the conveyors 58 to 60 and the polishers 63 to 65 are both in the home position. In this state, the glass plate Q ₄ is supplied to the first table 53 at the uppermost stream, and the locking pin 67 causes the glass plate Q ₄ to move to a predetermined position. When set to, by suction through the suction holes (not shown) in the table 53,
The glass plate Q ₄ is fixed to the table 53. FIG. 9A
Indicates that the transporters 58 to 60 have moved to the shift position thereafter.

Next, as shown in FIG. 9B, a polishing machine 63
Through 65 move from the home position to the shift position, and in the process, the first edge of the glass plate Q ₄ on the table 53 is polished.

Next, after the glass plate Q ₄ is unfixed from the table 53, the glass plate Q ₄ is sucked by the carrier 58 and lifted up. Then, as shown in FIG. 9 (C), when the conveyors 58 to 60 are moved to the home position, the glass plate Q ₄ that has been lifted is transported while being rotated by 90 ° in the direction of the arrow shown in the drawing. At the same time as being set in the table 54 of
Next, a glass plate Q ₃ to be polished is set.

By moving the polishing machines 58 to 60 to the shift position again from this state, as shown in FIG. 9D, the second edge of the glass plate Q ₄ is polished and the glass plate Q ₄ is polished. For Q ₃ , the first edge is ground and then the carriers 58-60 are moved to the shift position.

Similarly, each glass plate Q sent to the subsequent stage while being rotated by 90 ° is similarly polished by the polishing machines 58 to 6.
When moving to the 0 shift position, one edge is polished, and FIG.
In (F), the glass plate Q ₄ supplied first has its third edge polished on the third table 55,
_As shown in (G) and (H) of FIG. 9, ₄ is transferred from the fourth table 56 to another processing step by a carry-out device (not shown).

In the apparatus of the second aspect of the present invention, the polishing of the three edges is performed, but when performing the four edge polishing, it is sufficient to add one polishing machine and one table. In that 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 steps are sequence-controlled, but individual control such as individually driving only the polishing machine can be performed.
All can be controlled manually. Further, in this apparatus, the glass plate was polished when the polishing machine moved from the home position to the shift position (one-way polishing), but it can also be polished when returning from the shift position to the home position (reciprocal polishing), The polishing operation in that case will be described with reference to FIG.

As shown in FIG. 10A, the conveyors 58 to 60 and the polishing machines 63 to 65 are both in the home position, and in this state, the glass plate Q is placed on the first table 53.
₄ is set.

Next, as shown in FIG. 10B, the polishing machine 6
Glass plate Q ₄ when 3 to 65 move to shift position
The first edges of the
0 also moves to the shift position.

Next, as shown in FIG. 10C, the carrier 5
8, the glass plate Q ₄ is set on the second table 54 while rotating 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. 10D, the polishing machine 6
When 3 to 65 return to the home position, the second edge is polished for the glass plate Q ₄ and the first edge is polished for the glass plate Q ₃ . Then, the carriers 58 to 60 move to the shift position.

Similarly, each glass plate fed to the subsequent stage while being rotated by 90 ° is similarly polished by the polishing machines 63 to 65.
When moving from the home position to the shift position or when moving 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. Then, 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 shortened.

FIG. 12 is a plan view showing an embodiment of the apparatus according to the third invention. In the second invention, the transporting machine and the polishing machine are separately provided so that they can be moved individually.
In the above, the three transfer machines 58 to 60 and the polishing machines 63 to 65 are alternately connected so that they can be moved integrally along the guide rail 66. FIG. 12 shows the polishing operation in this case.
Will be explained.

Initially, as shown in FIG. 12A, the carrier 58 or the grinders 63 to 65 are at the home position, and in this state, the glass plate Q ₄ is set on the first table 53. It

Next, as shown in FIG. 12B, the table 53 is moved by moving the carrier and the polisher to the shift position.
The first edge of the upper glass plate Q ₄ is polished. Next, when the transporting machine and the polishing machine return to the home position, the transporting machine transports the glass plate Q ₄ to the second table 54 while rotating 90 °.

Next, as shown in FIG. 12D, when the carrier and the grinder move to the shift position again, the second edge of the glass plate Q ₄ is ground and the glass plate Q ₄ is ground. _{For 3} , the first edge is ground.

In this case as well, one edge is simultaneously polished on each table in the same manner below.
This corresponds to the case where the transport machine and the polishing machine are simultaneously moved in the one-way polishing of FIG.

[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 plates are transported by the transport machine. Since it is rotated 90 ° and fed to the subsequent stage at the same time, 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). In the case of), the polishing rate can be significantly improved. Moreover, since the number of tables can be easily increased or decreased according to the number of edges to be polished, an appropriate system can be constructed according to the material to be polished and can be easily applied to an automated line. Furthermore, in this device, since the distance between each unit or the table is invariable, it is easy to install a waterproof cover required in the gap between them and an inexpensive plate material can be used.

[Brief description of drawings]

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

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

3 is a plan view of the apparatus of FIG.

FIG. 4 is a front view of the apparatus of FIG. 1 when the table is moved to the right.

5 is a diagram showing a series of polishing operations in the apparatus of FIG.

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

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

8 is a plan view of the device of FIG.

9 is a diagram showing a series of polishing operations in the apparatus of FIG.

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

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

FIG. 12 is a diagram showing a series of polishing operations in the apparatus of FIG.

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

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

[Explanation of symbols]

 1 Stand 3 Guide Rail 4 Parent Unit 5 Moving Stand 6 Sliding Unit 7 Sliding Unit 8 Sliding Stand 9 Moving Stand 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 Locking Pin 31 Pressing pin 34 Polishing machine 37 Corner polishing machine 51 Frame 52 Member 53 Table 57 Guide rail 58 Conveyor 61 Pad 62 Glass plate rotating device 63 Polishing machine 67 Locking pin 68 Waterproof cover Q Glass plate

Claims (7)

[Claims] 1. A glass polishing apparatus for polishing a peripheral edge of a glass plate, comprising: a table on which the glass plate to be polished is placed; and a positioning for aligning the glass plate placed on the table with a predetermined reference position. Means and fixing means for fixing the positioned glass plate to the polishing table; and a connection for connecting the plurality of units to each other linearly at regular intervals L Members and;
A moving means for moving each unit to a shift position which is separated from the original home position in the downstream direction by L 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 so as to simultaneously polish one edge of the upper glass plate; before returning each unit in the shift position to the home position, lift the glass plate in each unit in the shift position, And a glass plate rotating means that mounts the glass plate in a state of being rotated by 90 ° on the table of each unit returned to the glass polishing apparatus. 2. The glass polishing apparatus according to claim 1, further comprising a corner polishing means for polishing a corner of a glass plate set on each table at a side edge to be polished. 3. A glass polishing apparatus for polishing the edges 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 aligning the glass plate with 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: a means and a conveying means for moving each polished glass plate on each table to a subsequent table in a state of being rotated by 90 °. 4. The glass polishing apparatus according to claim 3, wherein the polishing means performs polishing even when moving in the downstream direction. 5. A glass polishing apparatus for polishing the 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 aligning the glass plate with 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, and when the polishing means moves in the downstream direction, each polished glass plate on each table is moved by 90 °.
A glass polishing apparatus, comprising: a transporting unit that moves each table to a subsequent stage table in a rotated state. 6. The glass polishing apparatus according to claim 1, wherein a waterproof cover is provided 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.