JPH04238827A - Apparatus for dividing glass substrate for liquid crystal cell - Google Patents

Abstract

PURPOSE:To improve the location accuracy of collision and to prevent the surface flaw of a substrate by sucking and fixing a glass substrate on a work table for removing unnecessary materials from the substrate and automatically transferring the substrate to control the collision force of a breaking head. CONSTITUTION:A glass substrate 1 is located facing the scribed face downward, sucked with a transfer machine and transferred on a work table 2. The substrate 1 is sucked to and fixed on the table 2 having plural through-holes by evacuating the space in the table, the table 2 is moved by a prescribed distance with an automatic transfer mechanism 7 and the 1st scribed line of the substrate 1 is brought into collision under high pressure with a breaking head 5 at the tip end of a rubber rod 4 driven with a pneumatic cylinder 6. Similarly, the table 2 is moved by a prescribed distance and the above collision is applied to the 2nd scribed line under the normal low pressure, the above operations are repeated and the final collision is performed under a high pressure. The glass substrate 1 is reset from the table 2. A nozzle of a cleaner 8 is lowered simultaneous to the start of the returning motion of the table to the original position to remove the unnecessary materials on the table with the cleaner.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for dividing and forming glass substrates for liquid crystal cells by dividing them at scribing positions.

0002

2. Description of the Related Art FIG. 4 is a front view showing a schematic structure of this type of apparatus for dividing and forming glass substrates for liquid crystal cells. In the figure, 1
A glass substrate is placed on a work table 2 made of an elastic body, and the glass substrate 1 is marked at dividing positions as shown in FIG. 3 is a table support stand that supports the work table 2; 4 is a table support stand that supports the work table 2;
This is a rubber rod for cutting), and a braking head 5 is attached to the tip. 6 is an air cylinder that drives this rubber rod 4 in the vertical direction.

[0003] In the apparatus configured as described above,
First, place the scribed glass substrate 1 on the work table 2 with the side with the scribe line (divided side) facing down, and place a rubber plate directly above the scribe line as shown in Figure 2. Visually align the rod 4. Then, the rubber rod 4 is driven by the air cylinder 6, and the braking head 5 at the tip collides with the glass substrate 1 at a predetermined collision pressure F. As a result, the glass substrate 1 and the elastic work table 2 are slightly deformed by the collision energy, a crack is generated along the scribe line, and the glass substrate 1 is formed into pieces.

0004

[Problems to be Solved by the Invention] However, in the conventional dividing forming apparatus for glass substrates for liquid crystal cells as described above, it is necessary to manually move the glass substrate and visually align the scribe line and the breaking head. As a result, there is a problem that the positioning accuracy is poor and the dividing surface (fracture surface) is not constant, and there is a risk that defective products as shown in FIG. 6 will be produced. (a) and (b) in Figure 6 are “
(c) shows an example where "crackling" occurred, (d) shows an example where "remaining" occurred, (e) shows an example where "diagonal cracking" occurred, and (e) shows an example where "diagonal cracking" occurred. When "diagonal cracks" occur, the shape and dimensions become larger.

The present invention was made in view of the above-mentioned problems, and is a method for dividing glass substrates for liquid crystal cells, which achieves high positioning accuracy, makes the dividing plane constant, and improves yield and quality. The purpose is to obtain a forming device.

[0006]

[Means for Solving the Problems] An apparatus for dividing and forming glass substrates for liquid crystal cells according to the present invention is constructed as follows.

(A) In an apparatus for dividing and forming a glass substrate for a liquid crystal cell, which divides and forms a glass substrate by colliding a breaking head with a glass substrate marked at dividing positions, a plurality of devices are used to fix the glass substrate by suction using vacuum force. Collision between a work table made of an elastic body having a through hole, an automatic conveyance mechanism that aligns the dividing position of the marked glass substrate placed on the work table with the breaking head, and the breaking head. The apparatus includes a drive means that can control pressure, and an unnecessary matter removing means that removes unnecessary matters on the work table.

(B) In the apparatus for dividing and forming glass substrates for liquid crystal cells as described in A above, the automatic transport mechanism is configured to measure the dimensions from the tip of the glass substrate to the first marking line, the width of the terminal surface of the liquid crystal cell, and the opposite. The division positions can be aligned by inputting the necessary data from among the surface width dimension, terminal width dimension, and dimension data obtained by subtracting the terminal width from the terminal surface width.

(C) In the apparatus for dividing and forming glass substrates for liquid crystal cells according to A or B, the braking head includes:
A stopper makes it stop at the bottom dead center.

(D) In the apparatus for dividing and forming glass substrates for liquid crystal cells according to any one of A, B, and C, the unnecessary material removing means is configured to suck unnecessary materials on the work table through a nozzle using vacuum force.

[0011]

[Operation] In the device for dividing and forming glass substrates for liquid crystal cells of the present invention, the glass substrates are suctioned and fixed onto the work table, and the positioning is automatically performed with high precision, and the collision pressure of the braking head is adjusted appropriately. is controlled, and unnecessary items on the work table are removed.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view showing a schematic configuration of an apparatus for dividing and forming glass substrates for liquid crystal cells according to an embodiment of the present invention, and the same reference numerals as in FIG. 4 indicate the same components. In the figure, 1 is a glass substrate for a liquid crystal cell with markings at the dividing positions, and 2 is a work table made of an elastic material such as rubber on which the glass substrate 1 is placed, and the glass substrate 1 is fixed by suction using vacuum force. A plurality of through holes are provided for this purpose. 3
is a rigid table support base that supports this work table 2; 4 is a rubber rod with a braking head 5 attached to its tip; 6 is an air cylinder (driving means) that drives this rubber rod 4 in the vertical direction; The collision pressure of the head 5 against the glass substrate 1 can be controlled, and the braking head 5 is stopped at the bottom dead center by a stopper. 7 shows the dividing position of the marked glass substrate 1 placed on the work table 2 and the breaking head 5
8 is a vacuum cleaner (unnecessary object removal means) that removes unnecessary objects such as minute glass dust on the work table 2, and The device is configured to suction unnecessary materials on the work table 2 through the nozzle.

FIG. 2 is a sectional view showing the detailed structure of the work table 2. As shown in FIG. As mentioned above, this work table 2 is provided with a large number of through holes 2a having a diameter of about 2 mm, and the lower table support 3 also has grooves 3a and through holes so as to communicate with the through holes 2a. 3b is provided. The glass substrate 1 is suctioned and fixed to the work table 2 by suction and exhaust through the through hole 3b using a vacuum force, and the work table 2 is configured like an elastic suction cup.

[0014] In the apparatus configured as described above,
The glass substrate 1 with markings at predetermined division positions is automatically placed on the work table 2, and the glass substrate 1 is automatically placed on the work table 2.
The work table 2 with fixed moves in the left and right direction in the figure,
The braking head 5 and the scribe line of the glass substrate 1 are automatically aligned. Then, the braking head 5 descends and collides with the scribe line,
The glass substrate 1 is divided and formed by the collision pressure F. At that time, the automatic transport mechanism 7 that moves the work table 2
is the data of the dimension from the tip of the glass substrate 1 to the first scribe line, the terminal surface width dimension of the liquid crystal cell, the opposite surface width dimension, the terminal width dimension, and the dimension obtained by subtracting the terminal width from the terminal surface width. By inputting up to three necessary data from among these, the division positions are aligned and automatic feeding is performed.

That is, the glass substrate 1 includes a reversible pattern substrate and a repeat pattern substrate.
Among these, in the case of a reversible pattern board, as shown in FIG. data is required, and the same d data is required for the back side.
, e, and f are required. In addition, for the repeat pattern board, as shown in FIG. 3(b), for the front side, the dimension g from the board edge to the first scribe line is
and the terminal surface width dimension h, and for the back side, the dimension i from the board edge to the first scribe line, the terminal width dimension j, and the terminal surface width dimension h minus the terminal width dimension j. Three pieces of data for dimension k are required. These three pieces of data at most are input to a sequencer using a thumb rotary switch, which is a digital switch, and the sequencer calculates the feed dimension and performs positioning.

Therefore, high positioning accuracy can be obtained, and the braking head 5 can be accurately collided with the scribe line of the glass substrate 1, so that the dividing surface (fracture surface) is perpendicular to the surface of the glass substrate 1. It becomes constant. Therefore, the occurrence of defective products as shown in FIG. 6 is reduced, and yield and quality are improved. At this time, as mentioned above, the maximum number of automatically sent data is three, which can be input using a digital switch, making it easy to input divided data.

Furthermore, since the collision pressure F of the braking head 5 can be controlled by the air cylinder 6, the glass substrate 1
It is possible to obtain the optimum collision pressure F for. That is, the positions of the first and last scribe lines on the glass substrate 1 are as follows:
The dimension to the edge of the glass substrate 1 is short, and the glass substrate 1
It is in a position where it is difficult to deform and difficult to divide. For this reason, in this embodiment, the air pressure of the air cylinder 6 is set high during the first and final divisions so that a good collision pressure F can be obtained over the entire glass substrate 1. Furthermore, in this embodiment, a stopper is provided to stop the braking head 5.
is stopped at the bottom dead center, thereby preventing unnecessary deformation of the glass substrate 1.

Further, in this embodiment, a vacuum cleaner 8 is provided, and when the divided glass substrate 1 is reset from the work table 2 and the table support 3 returns to its original position, the nozzle of the vacuum cleaner 8 is lowered. Unwanted materials on the work table 2 are suctioned and removed. Therefore, minute glass dust and the like generated when the glass substrate 1 is divided is removed from the work table 2, and the surface of the glass substrate 1 is prevented from being scratched.

Next, the operation of dividing and forming the glass substrate 1 described above will be explained step by step. (a) First, the glass substrate 1 is set on a positioning table (not shown) with the surface with the scribe line (divided side) facing down. (b) When the sensor detects the glass substrate 1 on the positioning table, the positioning pins are activated and the glass substrate 1 is positioned. (c) When the above positioning is completed, the suction pad of the transfer machine suctions the glass substrate 1 and transfers it onto the work table 2. (d) Exhaust the inside of work table 2 and
A glass substrate 1 is suctioned and fixed on top. (e) Move the work table 2 by a predetermined dimension (fixed dimension) and the dimension a in FIG. make it collide. At this time, the air pressure in the air cylinder 6 is set to be high because it is the first scribe line. (f) Similarly, the work table 2 is moved by a dimension b, and the braking head 5 is caused to collide with the second scribe line. At this time, the air pressure in the air cylinder 6 is set to a normal low pressure. (g) Similarly, the work table 2 is moved by c dimension and the braking head 5 is caused to collide with the third scribe line. At this time, the air pressure in the air cylinder 6 is kept low as described above. (h) Repeat the operations (f) and (g) above to move the work table 2 and collide the braking head 5 on the last scribe line. At this time, air cylinder 6
The air pressure shall be high. (i) Reset the glass substrate 1 from the work table 2. (j) At the same time as the work table 2 begins to return to its original position, the nozzle of the vacuum cleaner 8 is lowered, and unnecessary objects on the work table 2 are removed. (k) When the work table 2 returns to its original position, the next glass substrate is set and the above operations are repeated.

[0020]

[Effects of the Invention] As described above, according to the present invention, since the scribe line of the glass substrate and the braking head are aligned by automatic conveyance, high positioning accuracy can be obtained and the dividing plane is constant. This has the effect of improving yield and quality, and since the collision pressure can be controlled, good collision pressure can be obtained over the entire glass substrate.Furthermore, a means for removing unnecessary materials on the work table is provided. This has the effect of preventing scratches on the surface of the glass substrate.

[Brief explanation of the drawing]

[Fig. 1] Front view showing one embodiment of this invention

[Figure 2] Figure 1
Cross-sectional view showing the detailed structure of the work table

[Figure 3] Figure 1
Explanatory diagram showing the input data of the automatic transport mechanism of

[Fig. 4] Front view showing a conventional device

[Fig. 5] Cross-sectional view showing an enlarged view of the main parts of Fig. 4

[Fig. 6] An explanatory diagram showing an example of a defect when forming a glass substrate by dividing it.

[Explanation of symbols]

1 Glass substrate 2 Work table 2a Through hole 3 Table support stand 3a Groove 3b Through hole 4 Rubber stick 5 Braking head 6 Air cylinder (driving means) 7 Automatic transport mechanism 8 Vacuum cleaner (unnecessary material removal means)

Claims (4)

[Claims] Claim 1: A dividing and forming apparatus for a glass substrate for a liquid crystal cell, which divides and forms a glass substrate by colliding a breaking head with a glass substrate marked at dividing positions. A work table made of an elastic body having a through hole, an automatic conveyance mechanism that aligns a dividing position of a scribed glass substrate placed on the work table with a breaking head, and a collision pressure of the breaking head. 1. An apparatus for dividing and forming a glass substrate for a liquid crystal cell, comprising: a drive means capable of controlling the operation; and an unnecessary matter removing means for removing unnecessary matters on the work table. 2. The automatic transport mechanism is configured to measure the dimensions of the glass substrate from the tip to the first marking line, the width of the terminal surface of the liquid crystal cell, the width of the opposite surface, the width of the terminal, and the width of the terminal surface. 2. The apparatus for dividing and forming a glass substrate for a liquid crystal cell according to claim 1, wherein the dividing position is aligned by inputting necessary data from data on dimensions obtained by subtracting the terminal width from the terminal width. 3. The apparatus for dividing and forming glass substrates for liquid crystal cells according to claim 1, wherein the braking head is stopped at the bottom dead center by a stopper. 4. The apparatus for dividing and forming a glass substrate for a liquid crystal cell according to claim 1, wherein the unnecessary matter removing means uses a vacuum force to suction the unnecessary matter on the work table through a nozzle.