KR20130014102A

KR20130014102A - A breaking apparatus able to control horizontal level and a method for measuring horizontal level using a breaking apparatus of glass panel

Info

Publication number: KR20130014102A
Application number: KR1020110076029A
Authority: KR
Inventors: 장희동; 문상욱
Original assignee: 주식회사 탑 엔지니어링
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2013-02-07
Also published as: CN102898012B; TW201304922A; TWI577518B; KR101763572B1; CN102898012A

Abstract

PURPOSE: A breaking apparatus capable of controlling horizontal level is provided to precisely control the horizontal level of a breaking head, thereby being capable of uniformly pressing a glass panel in a horizontal state. CONSTITUTION: A breaking apparatus capable of controlling horizontal level(1000) comprises a base(100), transfer screw units(200), a movable block(120), cylinders(300), a pressure control unit, breaking heads(500), a contact sensing means, a rotation amount sensor, and a control unit. The base is installed in the upper part of the glass panel(P) which is transferred on a stage(S). The transfer screw unit comprises a motor and a transfer screw. The movable block is screw-coupled to the transfer screw unit. The cylinder is fixed to the movable block. The breaking head is connected to the cylinder rod(310). The contact sensing means sense the contact of the stage and the breaking head. The rotating amount sensing apparatus senses the descending rotation amount and the standard rotation amount of the breaking head. The control part calculates the difference between the descending rotation amount and the standard rotation amount. [Reference numerals] (AA) Transferring direction; (BB) Right side; (CC) Left side

Description

Breaking device that can adjust horizontal level and horizontal level adjustment method of braking device

The present invention relates to a braking device capable of adjusting the horizontal level and a horizontal level adjusting method of the braking device. More specifically, the braking head is horizontal so that the braking head can always apply a uniform pressing force in a horizontal state with respect to the glass panel. A braking device capable of adjusting the level more precisely, and a horizontal level adjusting method of the braking device.

Generally, PDPs, LCDs, LEDs, organic EL panels, inorganic EL panels, transmissive projector substrates, and reflective projector substrates used as flat panel display panels are brittle mother glass panels (glass) or the like. It is obtained by cutting a "parent substrate", hereinafter referred to as a "glass panel" to a predetermined size.

The cutting process of the glass panel includes a scribing process of forming a scribing line on the surface of the substrate by using a tool (scribing wheel) made of diamond or the like having a hardness higher than that of the glass panel, and the glass A braking process that presses the panel to apply a bending moment or cuts by heating or cooling around the crack of the scribing line, the apparatus for performing the scribing process is commonly referred to as a scribing device or a scriber, A device for performing the braking process is called a braking device. The scribing device and the braking device may be combined with each other to be integrally formed or may be separately configured.

1A and 1B illustrate a representative example of the braking device according to the prior art, and the configuration and operation thereof will be described below.

First, as shown in FIG. 1A, the glass panel braking device according to the prior art presses the base 10 and the glass panel P installed on an upper portion of the stage S supporting the glass panel P. Braking head 20 and the first transfer screw unit (30A) and the second transfer screw unit (30B) for transmitting the pressing force to the left and right of the braking head (20), respectively, when viewed along the conveying direction of the glass panel And a load cell 40 interposed between the braking head 20 and the first transfer screw unit 30A and the braking head 20 and the second transfer screw unit 30B, respectively.

The braking head 20 has a head body 22 having links 21a and 21b so as to have degrees of freedom for rotation with respect to the first transfer screw unit 30A and the second transfer screw unit 30B, respectively, It is installed at the lower end of the head body 22 and consists of a breaking bar 23 for pressing the surface of the glass panel (P).

In particular, the link 21b applied to the second transfer screw unit 30B is installed in the slot hole so that the link 21b may have not only rotation with respect to the head body 22 but also freedom along the longitudinal direction of the head body 22. It is possible to extend the feed screws constituting the first feed screw unit 30A and the second feed screw unit 30B independently of each other.

According to this braking device, the horizontal level of the braking bar 23 is constantly at the zero position of the glass panel P so that the tip of the braking bar 23 can be simultaneously in contact with the surface of the glass panel P. You need to keep it.

That is, as shown in FIG. 1B, when the horizontal level of the breaking bar 23 is not constant with respect to the glass panel P in the standby position (upper position), the first feed screw unit 30A and the second feed screw unit It is necessary to make the braking bar 23 contact the glass panel P at the same time by adjusting the rotational speed of 30B to adjust the left and right lowering speeds of the braking bar 23.

In addition, from the moment when the braking bar 23 is in contact with the glass panel P in a parallel state to the completion of the pressurization, the pressing bar 23 maintains the left and right descending speeds of the braking bar 23 uniformly so as to apply a uniform pressing force.

In order to maintain the horizontal level of the glass panel P and the breaking bar 23 at the zero position as described above, the first feed screw unit 30A and the second feed screw unit 30B are first rotated in the related art. The left and right portions were brought into contact with the glass panel P by lowering the breaking bar 23.

At this time, when the horizontal level of the breaking bar 23 is not constant with respect to the glass panel P in the standby position, one inclined portion of the breaking bar 23 contacts the glass panel P first. As a result, the tip of the breaking bar 23 is in contact with the glass panel P while the breaking bar 23 is hinged about the contact point.

At this time, the load cells 40 respectively installed on the left and right sides of the breaking bar 23 around the conveying direction of the glass panel may detect a change in the load resulting from the pressing force on the glass panel P of the breaking bar 23. do.

As such, the point in time at which the breaking bar 23 contacts the glass panel P is a point in time at which the zero position of the glass panel P can be detected.

The zero positions L1 and L2 check the initial rotation positions of the first transfer screw unit 30A and the second transfer screw unit 30B when the braking bar 23 is in the standby state, and the braking bar 23 ) Is made by checking the rotational positions of the first transfer screw unit 30A and the second transfer screw unit 30B at the point of simultaneous contact with the glass panel P.

In this case, the horizontal level of the breaking bar 23 may be calculated by L2-L1.

The rotational position of the first transfer screw unit 30A and the second transfer screw unit 30B may be sensed by a built-in rotary echo (not shown).

When the zero positions L1 and L2 of the glass panel and the horizontal level L2-L1 of the braking bar 23 are confirmed as described above, the left and right portions of the breaking bar 23 are simultaneously opened by the control unit at the zero position. The rotational level of the first transfer screw unit 30A and the second transfer screw unit 30B is adjusted in advance so as to be in contact with P), thereby adjusting the horizontal level of the breaking bar 23, and thereafter, the first transfer screw unit. By maintaining the rotational amounts of the 30A and the second transfer screw unit 30B in the same manner, the braking bar 23 can be lowered and pressurized to perform the braking operation.

However, in the braking device for glass panels according to the prior art, the braking head 20 presses the glass panel P from the rotational force caused by the rotation of the first transfer screw unit 30A and the second transfer screw unit 30B. By controlling the position and the speed is easy, but the load control for imparting the optimal pressing force on the glass panel (P) was not possible.

In particular, in order to break the glass panel P in a good state, there is an optimum pressing force, pressing speed, and pressing depth depending on the material, thickness, ambient temperature, and breaking position of the glass panel P. The panel braking device could not satisfy these process conditions (pressing pressure, pressing speed, depth of pressurization), and the pressing force changed from the moment of pressing to the completion of breaking, resulting in an increase in product defect rate and a decrease in productivity. There was a downside.

The present invention has been made to solve the above problems, an object of the present invention is to ensure that the breaking head is always uniform in the state in which the braking head is horizontal to the glass panel in a glass panel braking device configured to satisfy the optimum process conditions. The braking device and braking device can be adjusted not only to adjust the horizontal level of the braking head precisely to apply the pressing force, but also to adjust the level of the breaking level of the breaking bar to the zero position of the glass panel and the moment of break. It is to provide a horizontal level adjustment method of the device.

According to another embodiment of the braking device capable of adjusting the horizontal level according to the present invention, in order to achieve the above object,

A base installed on an upper portion of the glass panel conveyed on the stage;

A feed screw unit installed on each of the left and right sides when viewed along the feed direction of the glass panel, the feed screw unit including a motor and a feed screw;

A moving block screwed to the transfer screw of the transfer screw unit;

A cylinder fixed to the moving block and installed at left and right sides when viewed along the transport direction of the glass panel;

A pressure regulating unit for adjusting an internal pressure of the cylinder;

Breaking head for simultaneously pressing the surface of the glass panel is connected to the cylinder rod of the left and right cylinders;

Contact sensing means for sensing that the breaking head contacts the stage;

A rotation amount sensing device connected to the motor to sense a falling rotation amount and a reference rotation amount of the left and right braking heads; And

It is configured to include a control unit for calculating the difference between the falling rotation amount and the reference rotation amount,

And adjust the left or right feed screw unit by the difference between the left and right falling rotation amounts and the reference rotation amount calculated by the controller.

The contact detecting means may be installed on the moving block and the braking head, respectively, or on the moving block or the braking head, and a displacement sensor for detecting the displacement of the braking head with respect to the moving block when the braking head is in contact with the stage. Or it is installed in the transfer screw unit is characterized in that the load cell for detecting the pressing force transmitted to the transfer screw unit.

Here, the rotation amount sensing device is characterized in that the rotary encoder.

In addition, the horizontal level adjustment method of the glass panel braking device according to the present invention,

The base is installed on the upper portion of the glass panel to be transported on the stage, the feed screw unit installed on the left and right sides when looking along the conveying direction of the glass panel, the moving block screwed to the feed screw of the feed screw unit, the glass panel It is installed on the left and right sides when looking along the conveying direction of the cylinder fixed to the moving block, a pressure regulating unit for adjusting the internal pressure of the cylinder, and simultaneously connected to the cylinder rod of the left and right cylinders to press the surface of the glass panel In the horizontal level adjustment method of the glass panel braking device comprising a braking head for

Operating the pressure control unit to determine a standby position of the braking head by applying a predetermined pressure to the left and right cylinders;

Measuring a reference rotation amount with a rotation amount detection device connected to a motor of the transfer screw unit respectively installed at the left and right sides at the standby position;

Lowering the braking head by simultaneously operating the left and right transfer screw units;

A touch sensing step of sensing that the breaking head is completely in contact with the stage;

Measuring a falling rotation amount with a rotation amount sensing device connected to the motors of the left and right feed screw units in the contact sensing step;

Calculating a difference between a falling rotational amount and a reference rotational amount in the left and right motors; And

And adjusting the feed screw unit on the left or right side by the difference between the amount of falling rotation and the reference amount of rotation on the left and right sides.

In addition, the contact sensing step, characterized in that the left and right sides when looking along the conveying direction of the glass panel, the change in the amount of displacement of the braking head with respect to the moving block at the moment when the braking head is in contact with the stage. It is done.

In addition, the amount of displacement of the braking head with respect to the moving block is characterized in that it is sensed by the displacement sensor installed in the moving block and the braking head, respectively, or in the moving block or the braking head.

In addition, the contact sensing step, characterized in that the left and right sides when looking along the conveying direction of the glass panel, the change in the pressing force transmitted to the conveying screw unit at the moment when the braking head is in contact with the stage, characterized in that consisting of. .

In addition, the pressing force transmitted to the transfer screw unit is characterized in that it is sensed by a load cell installed in the transfer screw unit.

The rotation amount sensing device may be a rotary encoder.

According to the present invention having the above-described configuration, the braking device capable of controlling the position and speed of the braking by the feed screw unit and at the same time maintaining the pressure of the braking head for pressurizing the glass panel by the cylinder and the regulator. In this case, the horizontal level of the braking head can be adjusted more precisely, so that the braking head can always exert a uniform pressing force in a horizontal state with respect to the glass panel, thereby minimizing the defective rate during cutting.

In addition, according to the present invention, it is possible to confirm the cutting depth of the breaking bar to the zero point position and the break moment of the glass panel, there is an advantage that it can be easily confirmed whether the required conditions are satisfied.

Figure 1a is a perspective view showing the configuration of a glass panel breaking device according to the prior art.
Figure 1b is a front view showing a horizontal angle level adjustment method of the glass panel breaking device according to the prior art.
2 is a perspective view showing the configuration of a glass panel breaking device according to the present invention.
3 is a side view of FIG. 2.
4 is a front view of FIG. 2.
5 is a partially enlarged view illustrating a configuration of the displacement sensor of FIG. 3.
6 is a side view showing a glass panel breaking device having a load cell according to the present invention.
7 is a flowchart illustrating a horizontal level adjusting method of the glass panel braking device according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 2 to 7 attached hereto.

As shown in FIGS. 2 to 6, the glass panel breaking device 1000 to which the present invention is applied includes a base 100 installed on an upper portion of the stage S supporting the glass panel P, and When viewed along the conveying direction of the glass panel P, the transfer screw unit 200 and the glass screw unit P, which are respectively installed on the left and right sides of the base 100 with respect to the center of the glass panel P, When viewed along the conveying direction, respectively installed on the left and right sides with respect to the center of the glass panel (P), the internal pressure of the cylinder 300, the cylinder 300 moving up and down by the transfer screw unit 200 It is configured to include a pressure control unit for adjusting, and the braking head 500 is connected to the cylinder rod 310 of the cylinder 300 to press the surface of the glass panel (P).

First, the base 100 is connected to a fixed support not shown to maintain a fixed state.

The transfer screw unit 200 is fixedly installed on the base 100, and includes a motor 220 and a transfer screw 210 connected to the motor 220 to enable rotational movement.

In FIGS. 2 and 3, the transfer screw unit 200 is installed one by one left and right when viewed along the transport direction of the glass panel P, but a plurality of the left and right may be installed.

The moving block 120 is screwed to the transfer screw 210 so that the transfer screw 210 can be elevated by the rotation of the transfer screw 210. That is, the movable block 120 is formed with a spiral groove 132a so that the transfer screw 210 can be screwed.

The transfer screw unit 200 is provided with a rotation amount detecting device (not shown) for detecting the amount of rotation of the transfer screw 210.

In this case, a rotary encoder may be adopted as the rotation amount sensing device.

A guide unit 130 such as a linear guide or a cross roller guide for guiding the moving block 120 may be installed in the base 100 to smoothly move the moving block 120.

In addition, the movable block 120 is fixed to the cylinder 300 on the left and right around the transfer direction of the glass panel (P), the cylinder rod 310 connected to the cylinder 300 in the vertical direction It extends, and the braking head 500 is provided at the lower ends of the left and right cylinder rods 310 via the links 531 and 532, respectively.

One of the links 531 has a degree of freedom for rotation as in the prior art, and the other link 532 has a degree of freedom for longitudinal movement of the braking head 500.

The cylinder 300 is installed one by one left and right when viewed along the conveying direction of the glass panel P, but a plurality of left and right cylinders may be installed.

The braking head 500 directly presses the surface of the glass panel P disposed on the stage S, the head body 510 connected to the cylinder rod 310, and the head body 510. It consists of a breaking bar 520 is installed at the bottom.

The braking bar 520 is made of a soft material such as rubber or urethane, and it is preferable to form a pointed end portion to apply a concentrated load.

A pressure regulating unit is connected to the cylinder 300 to transmit a pressing force acting on the glass panel P to a constant value.

As the pressure regulating unit, the regulator 400 may be representative, but another known unit may be used. The solenoid valve 410 may be connected to the regulator 400 to adjust the flow rate of the working medium (air or hydraulic fluid). It may be.

2 to 4, the movable block 120 and the braking head 500, or the movable block 120 or the braking head 500 are respectively provided with the movable block 120. Displacement sensor 600 for measuring the relative length of movement between the braking head 500 is installed, the braking head 500 is in contact with the stage (S) to detect the sudden increase in displacement.

For example, the sudden increase in displacement may be set such that the detected value suddenly increases by at least 10 times the previous detected value.

Undescribed component 'L' in FIG. 3 is a scribing line.

As shown in FIGS. 5A and 5B, the displacement sensor 600 may use both a contact displacement sensor 600a and a non-contact displacement sensor 600b.

The contact displacement sensor 600a is typically a differential transformer such as a linear variable differential transformer (LVDT). The contact displacement sensor 600a includes a coil 610a and a movable core 620a. When the coil 610a is magnetized by alternating current, the object to be measured is altered. An induced voltage is generated in the coil 610a by the movable iron core 620a moving in conjunction with the other, and has a principle of differentially coupling the extracted voltage difference to output the displacement value.

When the contact displacement sensor 600a is applied to the present invention, the coil 610a and the movable iron core 620a may be installed on the moving block 120 and the braking head 500, respectively.

On the other hand, it is preferable to use an optical sensor as the non-contact displacement sensor 600b.

The optical sensor is mounted on the object to move relative to the light emitting unit and the optical element, and the index plate and the moving scale are respectively installed on the relative moving object between the light emitting unit and the optical element, and then the moving scale is the index The linear scale is representative of the fact that the optical element can measure the displacement by reading the contrast signal of the light between the index plate and the moving scale when moving relative to the plate.

When the optical sensor is applied to the present invention, as shown in FIG. 5 (b), a light emitting unit and a moving scale 610b are installed in the braking head 500, and a scale reader including an optical element and an index plate. 620b may be installed on the movable block 120.

As the non-contact displacement sensor 600b, an eddy current sensor or an ultrasonic sensor may be used.

6, a load cell 132b is installed in the spiral groove 132a of the movable block 120 to detect that the braking head 500, which will be described later, contacts the stage S and rapidly increases the pressing force. May be

For example, the sudden increase in the pressing force may be set such that the detected value suddenly becomes 10 times larger than the previous detected value.

That is, the load cell 132b serves to sense that the braking head 500 is completely in contact with the stage S and the load is increased.

As a result, the displacement sensor 600 and the load cell 132b constitute the contact sensing means of the present invention.

Hereinafter, the operation of cutting the glass panel P using the glass panel braking device 1000 having the above-described configuration will be described.

First, if the glass panel P and the braking bar 520 are parallel in the standby position, the same pressure is set on the left and right cylinders 300, and the same rotation amount is applied to the left and right feed screw units 200, so that the glass is in the standby position. The braking operation can be performed while proceeding from the surface of the panel P to a predetermined depth.

In this case, the speed control is possible by lowering by the feed screw unit 200 at a predetermined speed from the moment when the braking bar 520 contacts the glass panel P, and at the same time, the regulator 400 connected to the cylinder 300. ), A predetermined pressing force on the glass panel P can be maintained.

As such, the speed and the pressing force may be separately controlled by the feed screw unit 200, the cylinder 300, and the regulator 400, so that the optimum breakage corresponding to the thickness, the breaking position, and the ambient temperature of the glass panel P may be achieved. It is possible to maintain the process conditions.

In addition, since the portion to apply the actual pressing force is the cylinder 300 and the cylinder rod 310, it is possible to prevent the impact force applied to the glass panel (P), thereby breaking the breaking bar 520 from the standby position Even down to a generally uniform rate, there is no delay in completing the braking process.

On the other hand, as shown in Figure 4, the tip of the braking bar 520 is often unable to keep parallel with the surface of the glass panel (P) due to a number of factors, if this is ignored and the braking operation is broken after breaking Uneven conditions result in poor product yield.

In order to prevent this, the operation of leveling the leveling of the breaking bar 520 needs to be preceded before the full breaking process is performed.

The horizontal level adjusting method of the braking device 1000 according to the present invention will be described below.

First, the pressure adjusting unit is operated to set a standby position of the braking head 500 by applying a predetermined pressure to the left and right cylinders 300 (S100).

For example, the pressure is adjusted by the regulator 400 to draw the cylinder rod 310 of the left and right cylinder 300 to the maximum.

Next, the reference rotation amount is measured by a rotation amount detection device connected to the motor 220 of the transfer screw unit 200 installed at the left and right sides at the standby position (S200).

Thereafter, the braking head 500 is lowered by simultaneously operating the left and right transfer screw unit 200 (S300).

Subsequently, a contact sensing step S400 of sensing that the breaking head 500 is completely in contact with the stage S is performed.

The contact sensing step (S400), when viewed along the conveying direction of the glass panel (P), the moving block 120 and the braking head 500, respectively, on the left and right sides, or the moving block 120 or By installing the displacement sensor 600 on the braking head 500, the braking head 500 is in contact with the stage S to rapidly detect a large displacement, or by installing a load cell 132b on the transfer screw unit 200. The braking head 500 is in contact with the stage (S) to detect the sudden increase in load.

Then, the falling amount of rotation is measured by the rotation amount detecting device connected to the motor 220 of the left and right feed screw unit 200 in the contact detection step (S400) (S500).

Next, the difference between the falling amount of rotation and the reference amount of rotation in the left and right motor 220 (S600).

Finally, the horizontal level of the braking head 500 is adjusted by adjusting the feed screw unit 200 on the left or right side by the difference between the downward rotation amount and the reference rotation amount on the left and right sides (S700).

As described above, according to the present invention, the position of the zero point between the braking head 500 and the stage S may be measured and the horizontal level of the braking head 500 may be adjusted by the contact sensing step through the displacement sensor or the load cell. It is possible to apply a uniform pressing force to the product, thus improving the yield of the product.

In addition, the difference between the rotation amount by the rotation amount sensing device and the vertical displacement based on the rotation amount and the pitch of the feed screw unit and the displacement by the displacement sensor until the glass panel is broken after adjusting the horizontal level once By checking in real time, it is possible to check the cutting amount for the glass panel P of the breaking bar 520 in real time.

As mentioned above, although the preferred embodiment of the present invention has been described in detail, the scope of the present invention is not limited to the above-described embodiment and may include various modifications and variations within the scope of the following claims.

100-base
120-Block
220-motor
210-Feed Screw
300-cylinder
310-cylinder rod
400-regulator
500-Breaking Head
510-head body
520-Breaking Bar
600-displacement sensor
610a-moving scale
610b-stator
620a-core
620b-scale reader
1000-breaking device for glass panels
S: stage
P: glass panel

Claims

A base installed on an upper portion of the glass panel conveyed on the stage;
A feed screw unit installed on each of the left and right sides when viewed along the feed direction of the glass panel, the feed screw unit including a motor and a feed screw;
A moving block screwed to the transfer screw of the transfer screw unit;
A cylinder fixed to the moving block and installed at left and right sides when viewed along the transport direction of the glass panel;
A pressure regulating unit for adjusting an internal pressure of the cylinder;
Breaking head for simultaneously pressing the surface of the glass panel is connected to the cylinder rod of the left and right cylinders;
Contact sensing means for sensing that the breaking head contacts the stage;
A rotation amount sensing device connected to the motor to sense a falling rotation amount and a reference rotation amount of the left and right braking heads; And
It is configured to include a control unit for calculating the difference between the falling rotation amount and the reference rotation amount,
And a leveling device capable of adjusting the left or right feed screw unit by a difference between the left and right falling rotation amounts and the reference rotation amount calculated by the controller.

The method of claim 1,
The contact sensing means,
A displacement sensor installed at the moving block and the braking head, or installed at the moving block or the braking head, for detecting an amount of displacement of the braking head with respect to the moving block when the braking head is in contact with a stage;
Or a load cell installed in the transfer screw unit to sense a pressing force transmitted to the transfer screw unit.

The method according to claim 1 or 2,
The rotation amount sensing device is a braking device capable of adjusting the horizontal level, characterized in that the rotary encoder.

The base is installed on the upper portion of the glass panel to be transported on the stage, the feed screw unit installed on the left and right sides when looking along the conveying direction of the glass panel, the moving block screwed to the feed screw of the feed screw unit, the glass panel It is installed on the left and right sides when looking along the conveying direction of the cylinder fixed to the moving block, a pressure regulating unit for adjusting the internal pressure of the cylinder, and simultaneously connected to the cylinder rod of the left and right cylinders to press the surface of the glass panel In the horizontal level adjustment method of the glass panel braking device comprising a braking head for
Operating the pressure control unit to determine a standby position of the braking head by applying a predetermined pressure to the left and right cylinders;
Measuring a reference rotation amount with a rotation amount detection device connected to a motor of the transfer screw unit respectively installed at the left and right sides at the standby position;
Lowering the braking head by simultaneously operating the left and right transfer screw units;
A touch sensing step of sensing that the breaking head is completely in contact with the stage;
Measuring a falling rotation amount with a rotation amount sensing device connected to the motors of the left and right feed screw units in the contact sensing step;
Calculating a difference between a falling rotational amount and a reference rotational amount in the left and right motors; And
And adjusting the feed screw unit on the left or right side by a difference between the amount of falling rotation and the reference amount of rotation on the left and right sides.

5. The method of claim 4,
The contact sensing step may be configured to sense a change in the displacement amount of the braking head with respect to the moving block at the moment when the braking head is in contact with the stage, in the left and right sides when viewed along the conveying direction of the glass panel. Horizontal level adjustment method of the braking device for glass panels.

The method of claim 5,
The level of displacement of the braking head with respect to the movable block is detected by a displacement sensor mounted on the movable block and the braking head, or on the movable block or the braking head, respectively. How to adjust.

5. The method of claim 4,
The touch sensing step may include a glass panel configured to detect a change in the pressing force transmitted to the transfer screw unit at the moment when the braking head is in contact with the stage, at the left and right sides when viewed along the conveying direction of the glass panel. How to adjust the horizontal level of the braking device.

The method of claim 7, wherein
The pressing force transmitted to the transfer screw unit is detected by a load cell installed in the transfer screw unit, horizontal level adjustment method of the glass panel braking device.

The method according to any one of claims 4 to 8,
The rotation amount sensing device is a horizontal level adjustment method of a glass panel braking device, characterized in that the rotary encoder.