JP2836313B2 - Sheet glass corner cutting method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal substrate, a furniture mirror,
The present invention relates to a sheet glass corner cutting method and apparatus for grinding a corner portion of a sheet glass such as architectural glass.

[0002]

2. Description of the Related Art The type of a liquid crystal substrate is identified by the shape of a corner cut formed in a corner portion of the liquid crystal substrate. Then, the corner cut of the liquid crystal substrate is performed by cutting the corner portion of the liquid crystal substrate being conveyed by a disk-shaped grindstone arranged on the side of the conveyance line. In general, there are two known corner cutting methods.

In the first method, when the liquid crystal substrate being conveyed has been conveyed to a predetermined position, the disc-shaped grindstones provided on both sides of the conveyance line are moved in a direction perpendicular to the direction of travel of the liquid crystal substrate. Go to Thereby, the corner portion of the liquid crystal substrate is cut. The second method is to connect a positioning member to a disc-shaped grindstone movably provided on both sides of the transfer line,
The transported liquid crystal substrate is brought into contact with the positioning member.
Thus the disc-shaped grindstone moves in together with the liquid crystal substrate.
In this state, the disc-shaped grindstone is moved obliquely to cut the corners of the liquid crystal substrate.

[0004]

However, in the first method, when the transport speed of the liquid crystal substrate is increased, the moving speed of the disc-shaped grindstone is increased. That is, since the grinding feed speed is increased, lack of glass become a heavy grinding, chipping, cracking occurs
It becomes a factor to do. Therefore, for example, when cutting the front corner portion of the liquid crystal substrate, there is a problem that heavy grinding is performed and the substrate is cut into a concave curved shape.

On the other hand, positioning a second method Runode moved by contacting the disc-shaped grindstone in together with the liquid crystal substrate on the positioning member to a liquid crystal substrate that has been conveyed, to increase the conveying speed of the liquid crystal substrate There is a problem that a crack occurs at the contact portion with the member. The present invention has been made in view of such circumstances, even when the transport speed of the liquid crystal substrate is increased, the corner portion of the liquid crystal substrate can be cut linearly,
It is still another object of the present invention to provide a method and an apparatus for cutting a corner of a sheet glass, which can prevent a liquid crystal substrate from cracking.

[0006]

The present invention achieves the above object.
To the side of the transport line for transporting sheet glass
Of the glass plate
Corner cutting method of sheet glass for grinding corners
While transporting the sheet glass, the grindstone carrier is
It moves independently of the sheet glass in the transfer direction and moves
Eliminate the difference in transport speed between the glass and the glass.
Move the grindstone on the grindstone carriage in the direction of grinding the corner.
The corner portion of the sheet glass is ground. Also,
The present invention, in order to achieve the above object, in a sheet glass corner cutting device for moving the disk-shaped grindstone provided on the side of the transfer line for transferring the sheet glass while rotating and grinding the corner portion of the sheet glass Having the disc-shaped whetstone
The corner portion of the sheet glass by moving the grinding wheel in the direction of grinding together, and grinding means for grinding the corner portion of the sheet glass, comprising the grinding means, parallel to the conveying direction of the sheet glass to together with the grinding means output and grindstone conveying stand moving the grinding wheel carrying means you move the the sheet glass grinding wheel carrier table parallel to the conveying direction of the sheet glass independently, the detection signal by detecting the conveying speed of the flat glass being the transport Detecting means, and a control unit for controlling the grinding wheel transfer means so that the grinding wheel transfer table moves at the same speed as the sheet glass based on the output detection signal, wherein the grinding means and the sheet glass are When moving at the same speed, the grinding wheel member of the grinding means cuts a corner portion of the sheet glass.

[0007]

According to the present invention, the grinding wheel carrier is provided with grinding means for grinding the corner portion of the sheet glass with a disk-shaped grindstone, and the grinding wheel carrier moves in parallel with the sheet glass carrying direction by the grinding wheel carrier means. The detecting means detects the sheet glass being conveyed and outputs a detection signal. Then, the control unit controls the grindstone transport means based on the output detection signal so that the grindstone transport table moves at the same speed as the transport speed of the sheet glass.

Therefore, when the sheet glass reaches the position where the corner portion is cut, the grindstone of the grinding means moves at the same speed as the conveying speed of the sheet glass. In this state, the grindstone moves in the grinding direction, and the corner of the sheet glass is cut.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a method and an apparatus for cutting a glass sheet according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view of a sheet glass corner cutting device 10 according to the present invention, FIG. 2 is a view taken along the line AA in FIG. 1, and FIG. Sheet glass corner cutting device 10
Are mainly grinding means 12, grinding wheel transport means 14, and detection means 16
And the control unit 18, and the grinding devices 12 A, 12 B, 12 C, and 12 D of the grinding unit 12
Two are arranged on each side of the zero. Conveying line 2
0 denotes the upper and lower transport belts 20A, 20
A, 20B, and 20B pinch and transport (see FIG. 2).

[0010] Grinding devices 12A, 12B, 12C, 12D
Are constituted by substantially the same members, the grinding device 12A will be described, and the other grinding devices 12B, 12C, 12
For D, only the differences will be described. The grinding device 12 </ b> A has a disk-shaped grindstone 24 shown in FIG. 2, and the grindstone 24 is coaxially fixed to a drive shaft of a spindle motor 26. The spindle motor 26 is attached to an end of a cutting table 30 shown in FIG. Cut moving table 30 is provided movably through a guide portion 30 A 及 beauty rail part 32 A in the turntable 32.

A piston rod 34A of an air cylinder 34 is mounted on the cut moving table 30, and a cylinder portion 34B of the air cylinder 34 is mounted on the rotating table 32. Therefore, when the air cylinder 34 expands and contracts, the grindstone 24 moves in the direction of the arrow (that is, in the direction intersecting the transport line 20 in a state inclined with respect to the transport line 20) via the cut moving table 30 or the like.

[0012] the rotation base 32 (not shown.) Rotating means between the adjustment movable carriage 36 is provided. This turning means uses a servomotor or a stepping motor for the drive system, and when the drive system operates, the turntable 32 turns clockwise or counterclockwise around the center thereof. Thereby, the grinding wheel 24 is expanded and contracted by the air cylinder 34.
You can change the direction in which

[0013] The adjustment moving base 36 is the guide portion 36A, 36 A
Grinding wheel carrying means 14 to be described later via 及 beauty rail portion 38 A
Is provided movably on the grindstone carrier 38. The rail portion 38 </ b> A is provided in parallel with the transport line 20. A servomotor 40 is attached to the grindstone carrier 38, and a ball screw (not shown) is formed on a drive shaft 40A of the servomotor 40. The ball screw of the drive shaft 40A is screwed to the adjustment moving table 36. Therefore, when the servo motor 40 is driven, the adjustment moving table 36 moves along the transport line 20, so that the grindstone 24 can be positioned at a predetermined position along the transport line 20.

Although the grinding device 12A of the grinding means 12 has been described above, the servomotors 40 and the adjustment moving table 36 are not provided in the grinding devices 12B and 12C. In the grinding devices 12B and 12C, a block 37 is fixed to a grindstone transfer table 38 as an alternative to the adjustment moving table 36, and the above-described rotating means (not shown) is provided between the block 37 and the rotating table 32. Is provided.

The grinding conveying table 38 of the grinding wheel carrying means 14 is provided movably in the body 42 through the guide portion 38B, 38 B及 beauty rail section 42A, the 42A. Rail part 42
A and 42A are arranged in parallel to the transport line 20.
A servomotor 44 is provided at one end of the main body 42, and a pulley 46 is coaxially fixed to a drive shaft of the servomotor 44.

Further, the other end of the main body 42 a pulley 48 is not rotatably supported, the pulley 46 and the pulley 48 have Thailand timing belt 50 is stretched, the Thailand timing belt 50 Is provided with a grindstone carrier 38.
Therefore, when the servomotor 44 is driven, the grinding wheel carrier 3
The grindstone 24 moves in parallel along the transport line 20 via the gears 8 and the like. Note that the constituent members of the grindstone transporting means 14 are shown in FIG.
Are disposed on both sides of the transport line 20 as shown in FIG.

The detecting means 16 is provided substantially at the center of the transport line 20, as shown in FIG. The detection means 16 includes a detection moving table 52 shown in FIG. Detection mobile table 52
Are guide portions 52A, 52A, and rail portions 54A, 54.
A is provided movably on the fixed base 54 via A, and the fixed base 54 is fixed to the transport line 20. Fixed base 5
4 is provided with a displacement sensor 56.

On the other hand, a protruding piece 56A is fixed to the detection movable table 52. Projecting pieces 56A are detected moving table 52 rail portion 54A displacement sensor 5 6 when, moved along the 54A
It is positioned so as to abut against. A predetermined pressure is applied to the projecting piece 56A in advance by a compression spring fixed to the stopper 58, an air cylinder 58A, or the like, and the initial position of the projecting piece is determined. And the projecting piece 5
When 6A comes into contact with the displacement sensor 56 and a predetermined pressure is applied to the displacement sensor 56, a signal is output from the displacement sensor 56.

A block 60 is fixed to the left end of the detection movable table 52 in the figure, and the height of the block 60 is set lower than the liquid crystal substrate 22 transported on the transport line 20. A positioning member 64 is rotatably supported on the block 60 around a pin 62. When the positioning member 64 is held in the state shown in FIG.
The detection moving table 52 moves at the same speed as the liquid crystal substrate 22 by contacting the liquid crystal substrate 22 conveyed by the above, and presses the displacement sensor 56 by the protruding piece 56A attached thereto to output a signal. .

A lever 66 is fixed to the pin 62, a piston rod 68 A of an air cylinder 68 abuts on the lever 66, and a cylinder 6
8B is attached. Therefore, the air cylinder 68
When is expanded and contracted, the positioning member 64 rotates. When the positioning member 64 rotates and falls, the contact between the liquid crystal substrate 22 and the positioning member 64 is released, and the liquid crystal substrate 22 is transported on the transport line 20. The displacement sensor 56, a compression spring projecting piece 56A is fixed to the stopper Pas 5 8 or
Pushed back by the air cylinder 58A or the like, the displacement sensor 5
The output of No. 6 disappears, and it becomes an initial state.

The control section 18 has a CPU 70 and a positioning unit 72. The CPU 70 receives the detection signal output from the displacement sensor 56 via the amplifier 74, and outputs the transfer speed of the grindstone transfer table 38 based on the detection signal so as to synchronize with the liquid crystal substrate 22 being transferred. The positioning unit 72 controls the servomotor 44 of the grindstone transfer means 14 via the servo amplifier 76 based on the speed signal output from the CPU 70 to move the grindstone transfer table 38 at the same speed as the transfer speed of the liquid crystal substrate 22. Signal (synchronous signal)
Is output. Thereby, the grindstones 24, 24, 24, 24
Move in synchronization with the transport speed of the liquid crystal substrate 22.

Further, as shown in FIG. 1, a positioning means 82 is provided on the transport line 80 on the upstream side of the sheet glass corner cutting device 10. The positioning means 82 has a belt 84 rotatably provided on the left side in the transport direction of the transport line 80, and the belt 84 is disposed parallel to the transport line 80. Further, the positioning means 82 has a pressing means 86 provided on the left side in the transport direction of the transport line 80. Accordingly, the liquid crystal substrate 22 conveyed to the conveyance line 80 is pressed against the belt 84 by the pressing means 86 and positioned on the reference side shown in FIG. In FIG. 1, reference numeral 90 denotes a servomotor for driving the transport line 20 and the transport line 80.

The operation of the sheet glass corner cutting device constructed as described above will be described with reference to FIGS. First, the grinding devices 12A, 12B, 12C, and 12D of the grinding means 12 are set based on the corner cut angle, length dimension, and width dimension of the liquid crystal substrate 22 to be processed. That is,
The liquid crystal substrate 22 for processing the direction in which the grindstone 24 moves by turning the turntable 32 clockwise or counterclockwise by operating the turning means of each of the grinding devices 12A, 12B, 12C and 12D. To the angle of the corner cut. Then, the servomotor 40 is driven to move the grindstone 24 via the adjustment moving table 36 or the like so as to match the length of the liquid crystal substrate 22.

Further, by operating a grindstone conveying means (not shown), the upper body 42 (see FIG. 3) in FIG.
The whetstone 24 is moved in a direction orthogonal to 0 so as to conform to the width dimension of the liquid crystal substrate 22. Next, the grinding device 12
A, the <br/> together with the contracting each of the air cylinders 34, 34 12D extending grinding apparatus 12B, 12C each of air cylinders 34, 34. Therefore, each whetstone 24,
24, 24, 24 are disposed at the positions shown in FIG.

Next, the servo motors 90, 90, etc. are driven to operate the transport line 20, the transport line 80, etc., to transport the liquid crystal substrates 22, 22,. Then, the liquid crystal substrate 22
Is transported to the transport line 80, the liquid crystal substrate 22 is pressed against the belt 84 by the pressing means 86 and positioned on the reference side shown in FIG. The positioned liquid crystal substrate 22 is transported to the transport line 20 (see the position of the liquid crystal substrate 22 in FIG. 5A).

In this state, the liquid crystal substrate 22 is transferred to the transport line 2
0 upper and lower conveyor belts 20A, 20A, 20B, 20B
And transported (see FIG. 2). Then, when it comes into contact with the positioning member 64 of the detection means 16, the detection movable table 52
Moves along the rails 54A, 54A. Next, the projecting piece 56A of the detection moving table 52 comes into contact with the displacement sensor 56, and a predetermined pressure is applied to the displacement sensor 56 (see FIG. 5B). As a result, a signal is output from the displacement sensor 56. An air cylinder 68 of the detection means 16 to together when a signal is outputted defeat rotates the positioning member 64 extends.
Accordingly, the contact between the liquid crystal substrate 22 and the positioning member 64 is released, and the liquid crystal substrate 22 is transported on the transport line 20.

On the other hand, the output signal is input to the CPU 70 via the amplifier 74. The CPU 70 determines the transfer speed of the liquid crystal substrate 22 and the grindstone transfer table 38 based on the detection signal.
The positioning unit 72 that outputs the transfer speed of the grindstone transfer table 38 outputs a signal to the servomotor 44 of the grindstone transfer means 14 via the servo amplifier 76 based on the speed signal output from the CPU 70 so that the speeds are synchronized. .

As a result, the servomotors 44, 44 are driven to move the grindstone carriages 38, 38 in synchronization with the transportation speed of the liquid crystal substrate 22, so that the grinding devices 12A, 12B,
The grindstones 24, 24, 24, 24 of 12C and 12D move in synchronization with the transport speed of the liquid crystal substrate 22 (FIG. 5).
(B)). Then, grinding apparatus 12A, each of the air cylinders 34 and 34 grinding device 12B to together when extending the 12D, to deflate the respective air cylinders 34, 34 of 12C. Therefore, each grindstone 24, 24, 24, 24
Moves in the direction of the arrow shown in FIG. As a result, the liquid crystal substrate 22 is corner-cut in a predetermined shape.

In the above embodiment, the rotating means of the grinding means 12
The servo motor 40 and the grindstone conveying means (not shown) were manually operated to correspond to the corner cut angle, the length dimension, and the width dimension of the liquid crystal substrate 22, but are not limited thereto. , The length dimension and the width dimension are input to the CPU 70 as data for each type, and when the type of the liquid crystal substrate 22 to be processed is changed, the rotating means of the grinding means 12, the servomotor 40, and the grindstone conveying means (not shown) are used. Automatically operated, the angle of the corner cut of the liquid crystal substrate 22,
You may make it correspond to a length dimension and a width dimension.

In the above-described embodiment, the grinding wheel 24 is moved in the corner cutting direction by operating the air cylinder 34. However, the invention is not limited to this, and a servo motor, a stepping motor or the like may be used. Moreover, in practice by the specification of the liquid crystal substrate, the grinding wheel 24 is used some, such as three or two of the four
Use is often. In the above-described embodiment, the adjustment moving table 36 is positioned by the servo motor 40. However, the present invention is not limited to this, and another driving system such as a stepping motor may be used.

In the above embodiment, the corner cut of the liquid crystal substrate 22 has been described. However, the present invention is not limited to this and can be applied to other sheet glass such as a furniture mirror.

[0032]

As described above, according to the method and the apparatus for cutting a sheet glass corner according to the present invention, when the sheet glass is transported to a position for grinding the corner portion, the grinding wheel of the grinding means has an independent drive system. , And is moved at the same speed as the transport speed of the sheet glass. Then, in this state, the grindstone moves in the grinding direction, and the corner of the sheet glass is cut.

Therefore, even when the conveying speed of the sheet glass is increased, the cutting can be performed without heavy grinding of the corner portion of the sheet glass, and furthermore, the occurrence of cracking of the sheet glass can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of a sheet glass corner cutting device according to the present invention.

FIG. 2 is a view taken in the direction of arrows AA in FIG. 1;

FIG. 3 is an enlarged view of a main part of a sheet glass corner cutting device according to the present invention.

FIG. 4 is a perspective view of a detecting means 16 of the sheet glass corner cutting device according to the present invention.

5 (A) and 5 (B) are explanatory views showing an operation state of a sheet glass corner cutting device according to the present invention.

FIG. 6 is an explanatory view showing an operation state of the sheet glass corner cutting device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Corner cutting device of sheet glass 12 ... Grinding means 14 ... Grinding stone conveying means 16 ... Detecting means 18 ... Control part 20 ... Conveying line 22 ... Liquid crystal substrate (sheet glass) 24 ... Grinding stone 38 ... Grinding stone conveying stand

Claims (8)

(57) [Claims] 1. A sheet glass corner cutting method in which a disk-shaped grindstone disposed on a side of a transfer line for transferring a sheet glass is rotated and moved to grind a corner portion of the sheet glass. While moving the grindstone transfer table independently of the sheet glass in the sheet glass transfer direction, there is no difference in transfer speed between the whetstone transfer table and the sheet glass.
Flat glass corner cutting method, characterized by grinding the corner portion of the sheet glass by moving the grinding stone conveying table of the grinding wheel in the direction of grinding the Na portion. 2. The method according to claim 1, wherein the sheet glass conveyance speed is detected.
Match the moving speed of the whetstone transfer table to the known transfer speed
2. The sheet glass corner cut according to claim 1, wherein
Method. 3. A sheet glass corner cutting apparatus for grinding a corner portion of a sheet glass by rotating a disk-shaped grindstone provided on a side of a transfer line for transferring the sheet glass, wherein the disk-shaped grindstone is removed. and moving the grinding wheel corner portion of the flat glass in the direction of grinding together as having a grinding means for grinding the corner portion of the sheet glass, comprising the grinding means, the conveying direction of the sheet glass to together with the grinding means a grindstone carrier table which moves in parallel, and the grinding wheel carrying means you move independently of the sheet glass to the grindstone conveying table parallel to the conveying direction of the sheet glass, the detection signal by detecting the conveying speed of the flat glass being the transport And a control unit that controls the grindstone transport unit so that the grindstone transport table moves at the same speed as the sheet glass based on the output detection signal. When the flat glass is moving at the same speed, a corner cutting device flat glass, characterized in that the grindstone member of said grinding means to cut the corner portions of the flat glass. 4. The whetstone transfer table and the whetstone transfer means.
Are arranged on both sides of the transport line.
The corner cutting device for a sheet glass according to claim 3, wherein 5. The method according to claim 1, wherein the transfer lines are provided on both sides of the transfer line.
The distance between the whetstone carriers is variable in the width direction of the sheet glass.
5. The plate according to claim 4, further comprising a variable means.
Glass corner cutting equipment. 6. The grinding wheel carrier has a plurality of grinding means.
The sheet glass according to claim 3, 4 or 5, wherein
Corner cutting equipment. 7. The plurality of grinding means have a variable distance from each other.
7. The sheet glass according to claim 6, wherein
Corner cutting equipment. 8. The grinding means, wherein the grinding wheel is attached to the plate glass.
Moving obliquely to the conveying direction of the glass
And a diagonal moving means for cutting the part.
The moving means sets the direction in which the whetstone moves obliquely to the corner portion.
It is characterized by being variable according to the cut angle of
8. The corner of a sheet glass according to claim 3, 4, 5, 6, or 7.
Cutting equipment.