JPH0938961A - Substrate cutting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable accurate cutting by always positioning a scribe wheel on the surface vertical to the surface of a substrate to be cut by rotating the respective rollers provided on both sides of the scribe wheel between holders along with the scribe wheel. SOLUTION: A wheel pin 15 is allowed to pierce the auxiliary rollers 17 made of a rubber material between the holders 6 on both sides of a scribe wheel 5. These auxiliary roller 17 are pressed to the seribe wheel 5 to be rotated along with the scribe wheel 5. Since the contact of the auxiliary rollers 17 with bearing 16 is limited only to the rotary part of the bearing 16, the auxiliary rollers 17 can be easily rotated along with the scribe wheel 5. By this constitution, the scribe wheel 5 is always positioned on the surface vertical to the surface of a glass transparent substrate 3 to be cut and not vibrated with respect to the vertical surface to enable accurate cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate cutting device, for example, a substrate cutting device for cutting a glass transparent substrate which constitutes a liquid crystal display substrate.

[0002]

2. Description of the Related Art For example, a liquid crystal display substrate is provided with a pair of glass transparent substrates which are arranged to face each other with a liquid crystal in between. Mandatory.

In cutting the glass transparent substrate, for example, a scribe wheel made of hard metal or diamond is rotated by applying pressure along the cutting point, and then the scribe is inserted.
A shearing force is applied to the scribe.

The conventional scribe wheel has a structure in which it is supported by a holder through a wheel pin which is inserted into a hole which serves as a bearing of the scribe wheel, and the holder is attached to a cutting portion of the glass transparent substrate by a driving mechanism connected thereto. It is configured to be moved along.

[0005]

However, in the substrate cutting apparatus having such a structure, the scribe wheel is not always positioned on the surface perpendicular to the glass substrate surface to be cut, and the glass substrate surface is to be cut. It has been pointed out that precise cutting cannot be achieved due to the slight swinging.

That is, the gap between the hole serving as the bearing of the scribe wheel and the wheel pin inserted into the hole has been a cause of the above-mentioned adverse effects.

In this case, when the pressure on the glass substrate of the scribe wheel is increased through the holder, the frictional force at one point between the bearing of the scribe wheel and the wheel pin increases, and as a result, the glass of the scribe wheel is increased. There was also a problem that a continuous scribe was not formed due to slippage on the substrate.

The present invention has been made under the above circumstances, and an object thereof is to always position a scribe wheel on a surface perpendicular to a substrate surface to be cut, so that accurate cutting can be achieved. An object of the present invention is to provide a substrate cutting device that can reach the target.

[0009]

SUMMARY OF THE INVENTION Among the inventions disclosed in the present application, the outline of a representative one will be briefly described.
It is as follows.

That is, in a substrate cutting apparatus having a structure in which a scribe wheel to be brought into contact with the surface of a substrate to be cut is supported by a holder via a wheel pin which is its rotation shaft, the holder is provided on each side of the scribe wheel. Rollers are provided between the rollers, the rollers rotate together with the scribe wheels by pressing the scribe wheels, and the outer peripheral surface is always in contact with the substrate surface with the rotation.

[0011]

In the substrate cutting apparatus thus constructed, each roller provided between the holder and the holder on each side of the scribe wheel is adapted to press the scribe wheel and rotate together with the scribe wheel. .

For this reason, the scribe wheel is always positioned on the surface perpendicular to the glass substrate surface to be cut, and does not swing slightly with respect to the vertical surface. Therefore, it becomes possible to achieve accurate cutting.

The outer peripheral surface of each of the rollers is always in contact with the substrate surface as the roller rotates. Therefore, even if the pressure of the scribe wheel on the glass substrate is increased through the holder, the scribe wheel can always rotate with respect to the glass substrate, and continuous scribes can be formed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a schematic block diagram showing an embodiment of a substrate cutting apparatus according to the present invention. The figure shows a substrate cutting device for cutting a glass transparent substrate that constitutes a liquid crystal display substrate.

In FIG. 1, first, there is a base 1, and a surface plate 2 is disposed on the upper surface of the center of the base 1, and on the surface plate 2, a glass transparent substrate 3 in the process of manufacturing a liquid crystal display substrate. Is arranged at a localization value by an adsorption mechanism (not shown).

The glass transparent substrate 3, as shown in FIG.
It has a rectangular shape, and after the wiring layer, electrodes, switching elements, etc. are formed in the central part (the part surrounded by the dotted line in the figure) excluding its peripheral part, it is cut along the dotted line. There is something. In addition, in FIG. 3, a substrate corresponding to one liquid crystal display substrate is cut with respect to one glass transparent substrate 3, but the present invention is not limited to this, and a substrate corresponding to a plurality of liquid crystal display substrates. Needless to say, it may be capable of cutting.

Here, the surface plate 2 can be rotated by driving a motor 3 arranged below the base 1. This is because the glass transparent substrate 3 is rotated by 90 ° when the scribe line is formed along the dotted line parallel to the x direction among the dotted lines shown in FIG. 3 and then the scribe line is formed along the dotted line parallel to the y direction. Is.

A holder 6 having a scribe wheel 5 is fixed to a moving body 7 above the glass transparent substrate 3, and the moving body 7 is supported by a supporting body 8.

The moving body 7 is moved by a worm 9A which is rotated by the driving of a motor 9 provided on the support body 8.
It can be moved in the x direction in the figure. Further, the support 8 is the motor 1 provided on the base 1.
By driving 0, it can be moved in the y direction in the figure.

As a result, the scribe wheel 5 is
Can be positioned at any position above the glass transparent substrate 3.

Further, the movable body 7 can move the holder 6 provided with the scribe wheel 5 in the z direction in the figure by a motor 11 provided therein.

That is, the holder 6 is directly fixed to the slider 12, and the slider 12 can be moved in the y direction in the figure by being guided by the guide 13 attached to the moving body 7.

The slider 12 is adapted to transmit a force in the −z direction generated by driving the motor 11 via an air cylinder 14.

By lowering the slider 12 in this manner,
The scribe wheel 5 comes into contact with the glass transparent substrate 3. In this case, the scribe wheel 5 can be brought into contact with the glass transparent substrate 3 without impact on the glass transparent substrate 3 due to the elastic function of the air cylinder 14.

Although not shown, the moving body 7 includes
A sensor is provided to detect when the slider 12 is stopped from moving with respect to the moving body 7, and the drive of the motor 11 is automatically stopped by the detection of this sensor. As a result, when the scribe wheel 5 comes into contact with the glass transparent substrate 3 by its descending (movement in the -y direction), the descending is automatically stopped. Moreover, due to the function of the air cylinder 14, the pressing force of the scribe wheel 5 on the glass transparent substrate 3 is kept constant.

The amount of air in the air cylinder 14 can be freely changed so that the pressing force of the scribe wheel 5 on the transparent glass substrate 3 can be set to an arbitrary value.

After the scribe wheel 5 is brought into contact with the transparent glass substrate 3, the motor 9 or the motor 1 is used.
A scribe is formed on the glass transparent substrate 3 by moving the moving body 7 in a desired direction by driving 0.

FIG. 1 is a block diagram showing the details of a scribe wheel 5 which is in contact with the glass transparent substrate 3 and a holder 6 which pivotally supports the scribe wheel 5. 2A is a partially cutaway view seen from the y direction in FIG.
FIG. 6B is a partial cross-sectional view as seen from the x direction.

In the figure, the scribe wheel 5 is made of diamond, a portion corresponding to the central axis thereof is bored, and a wheel pin 15 made of a hard metal is inserted into the hole. Both ends of the wheel pin 15 are rotatably supported by the holder 6, respectively, and particularly mediated by bearing bearings 16.

Further, auxiliary rollers 17 made of, for example, a rubber material are provided on both sides of the scribe wheel 5 between the scribe wheel 5 and the holder 6 so as to penetrate the wheel pins 15. Each of these auxiliary rollers 17 can press the scribe wheel 5 and rotate together with the scribe wheel 5. The contact of the auxiliary roller 17 with the bearing bearing 16 is limited only to the rotating portion of the bearing bearing 16, and thus the auxiliary roller 17 can easily rotate together with the scribe wheel 5. As a result, the scribe wheel 5 is always positioned on the surface perpendicular to the surface of the glass transparent substrate 3 to be cut, and does not swing slightly with respect to the vertical surface. Therefore, it becomes possible to achieve accurate cutting.

Further, the auxiliary roller 17 which rotates together with the scribe wheel 5 has a glass transparent substrate 3 on its outer peripheral surface.
It has a diameter that makes constant contact with the surface. That is, the radius of the auxiliary roller 17 is slightly smaller than that of the scribe wheel 5 (0.1 to 0.3 m).
difference of m). As a result, even if an excessive pressure is applied to the holder 6, the pressure is dispersed on the contact surface of the auxiliary roller 17 with the glass transparent substrate 3, and a local force is exerted between the bearing hole of the scribe wheel and the wheel pin. Will no longer occur. Then, the cut amount of the scribe wheel 5 with respect to the glass transparent substrate 3 (0.1 to 0.3 m
There is also an effect that m) is always constant. This makes it possible to perform appropriate scribing irrespective of the case where the glass transparent substrate 3 is warped, foreign matter or the like is attached to the place where the scribing is performed.

In this embodiment, the wheel pin 15, the scribe wheel 5, the auxiliary roller 17 and the like can be removed by removing the hinge 18 screwed to the wheel pin 15 at one end of the holder 6. It is like this. By making them compatible with each other, it is intended to form an appropriate scribe according to the type of the glass transparent substrate 3.

As described above, according to the substrate cutting apparatus shown in such an embodiment, the auxiliary rollers 17 provided between the holder 6 and both sides of the scribe wheel 5 press the scribe wheel 5. It is adapted to rotate together with the scribe wheel 5.

For this reason, the scribe wheel 5 is always positioned on the surface perpendicular to the surface of the glass transparent substrate 3 to be cut, and does not swing slightly to the vertical surface. Therefore, it becomes possible to achieve accurate cutting.

The outer peripheral surface of each of the auxiliary rollers 17 is constantly in contact with the surface of the glass transparent substrate 3 as it rotates. From this, even if the pressure of the scribe wheel 5 on the glass transparent substrate 3 is increased through the holder 6, the scribe wheel 5 can always rotate with respect to the glass transparent substrate 3 to form a continuous scribe. Will be able to.

The above-mentioned scribe wheel 5 has been described as being made of diamond, but it is not limited to this, and one made of hard metal may be used. Even in this case, it goes without saying that the basic configuration does not change and the configuration may be as shown in FIG.

However, when the scribe wheel 5 is made of a hard metal, the wheel pins 15 can be integrally formed together. In this case, even if the auxiliary roller 17 is not provided, the scribe wheel 5 can be constantly positioned on the surface perpendicular to the surface of the glass transparent substrate 3 to be cut.

Further, when the scribe wheel 5 is made of a hard metal, it goes without saying that the same effect can be obtained even if the auxiliary roller 17 is made of a hard metal and is integrated with the scribe wheel 5.

Further, although the present embodiment describes the apparatus for cutting the glass transparent substrate which constitutes the liquid crystal display substrate, it is not necessarily limited to the one constituting the liquid crystal display substrate, and other devices can be used. It goes without saying that the invention can also be applied to an apparatus for cutting a glass transparent substrate that constitutes an electronic component.

[0040]

As is apparent from the above description,
According to the substrate cutting apparatus of the present invention, the scribe wheel is always positioned on the surface perpendicular to the surface of the substrate to be cut, thereby achieving accurate cutting.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram showing an embodiment of a substrate cutting apparatus according to the present invention.

FIG. 2 is a schematic configuration diagram showing an embodiment of a substrate cutting device according to the present invention.

FIG. 3 is a plan view showing an example of a glass transparent substrate to be cut by the substrate cutting apparatus according to the present invention.

[Explanation of symbols]

3 ... Glass transparent substrate, 5 ... Scribe wheel, 6
…… Holder, 16 …… Bearing bearing, 17 …… Auxiliary roller.

Claims (6)

[Claims] 1. A substrate cutting device having a structure in which a scribe wheel to be brought into contact with a surface of a substrate to be cut is supported by a holder through a wheel pin which is a rotation shaft of the scribe wheel. Rollers are provided between the rollers, each of the rollers presses the scribe wheel to rotate with the scribe wheel, and
The substrate cutting device, wherein the outer peripheral surface is always in contact with the substrate surface as it rotates. 2. The substrate cutting apparatus according to claim 1, wherein the scribe wheel is made of diamond. 3. The substrate cutting device according to claim 2, wherein the wheel pin is axially supported by the holder via a bearing. 4. A scribe wheel, which is brought into contact with the surface of the substrate to be cut, is supported by a holder via a wheel pin which is its rotation shaft, and the scribe wheel is made of a hard metal. In the substrate cutting device, the wheel pin is integrally formed with a scribe wheel. 5. A roller is provided on each side of the scribe wheel between the scribe wheel and the holder, and each roller presses the scribe wheel to rotate together with the scribe wheel, and with the rotation, the outer peripheral surface contacts the substrate surface. The substrate cutting device according to claim 4, wherein the substrate cutting device is in constant contact. 6. The substrate cutting device according to claim 4, wherein the wheel pin is axially supported by the holder via a bearing.