JPH06335851A - Corner taking machine for glass plate - Google Patents

Abstract

PURPOSE:To provide a corner taking machine for a glass plate with a high precision which can exceedingly reduce the dispersion of the dimension of the corner to be cut, in the corner cut for the glass. CONSTITUTION:A corner taking machine for a glass plate is constituted so that when a square shaped glass 2 which travels at a constant speed passes through a previously set position, each corner at the front the rear ends of the glass 2 is cut by a wheel, and the reference bottles 23 of the front and rear trucks 19 each of which is equipped with the wheel and stand still are brought into contact with the front and rear ends of the glass 2. When the speed of the truck 19 is synchronized with the speed of the glass 2, each corner cut for the front and rear ends of the glass 2 by the wheel installed on the trucks 19. Further, the corner taking machine is equipped with a displacement sensor 41 for linearily detecting the position of the reference bin 23 on each truck 19 and a controller 42 which corrects the position of the reference bin 23 on each truck 19 so as to be set at a set standard position, by the signal supplied from the displacement sensor 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass plate chamfering machine applied to a glass processing facility capable of increasing a probability that a size of a cut corner falls within a tolerance.

[0002]

2 to 5 are a side view and a plan view of a chamfering machine provided in a conventional glass processing facility, and a plan view and a side view of a reference pin, a proximity sensor and a stopper. In the figure, a liquid crystal glass substrate (hereinafter referred to as glass) 2 that has entered (arrow) from the left side of the chamfering machine 1 is pressed against a reference side belt 4 by a pusher 3, and the reference side belt 4
It is sandwiched by the positioning rollers 5 and positioned in a direction (transverse direction) orthogonal to the traveling direction, and is transferred to the glass conveyor 6. The transported glass 2 is sandwiched between a lower belt 7 and an upper belt 8 which serve as a reference in the vertical direction, and is conveyed,
High-speed spindle motors 9A-D, wheels 10A-
At D, the four corners of the glass are cut sequentially.

As shown in FIGS. 6 and 7, the spindle motors 9A to 9D are provided with repellent manual parts so that the wheels 10A to 10D can be adjusted in the vertical direction, and their positions are set. Then, an air cylinder 36 for locking the repellent sliding portion is provided. In FIG. 8, brackets 15A to 15D on which spindle motors 9A to 9D are mounted, respectively.
Is a device for aligning the positions of the grooves of the wheels 10A to 10D with the vertical position of the traveling glass 2, that is, vertical adjustment devices 14, 14 for manually adjusting the dial cylinder 13 by loosening the lock of the air cylinder 36. 'And the wheel 10
A and 10B brackets 15A and 15B are provided only, and a manual angle adjusting device 16 for adjusting the feed angle (inclination of the y-axis in FIG. 4) θ of the wheels 10A and 10B, and the wheel 10A in the y-axis direction during corner cutting. The air cylinder 12 that moves the bracket 39 fixed to the guide 11 for moving the to D in the y-axis direction is provided, and the brackets 15A to 15D for the bracket 38 fixed to the carriages 19A to 19D are provided. The feed angle θ of the wheels 10A and 10B is detected by the encoder 17 attached to the worm wheel shaft of the manual angle adjusting device 16 in accordance with the inclination angle of.

Generally, in order to determine the front and back of the glass 2,
It is usual to change only the feed angle θ of the wheel 10A or 10B to an angle θ ′ different from the usual corner cut angle 45 °. The corner cut with this changed cut angle θ'is called orientation flat cut. Next, in FIG. 2, air cylinders 33A-D for reciprocating the limit switches 32A-D and the carriages 19A-D in the traveling direction of the glass 2 are provided in the fixed frame of the glass conveyer 6. In addition, 18A-D are trolley units including the trolleys 19A-D. Further, in FIGS. 4 and 5, the brackets 15A to 15D
A stopper 28 and a proximity sensor 26 allow a set position of these members to be adjusted by a support base 27 that is moved up and down by an air cylinder 31 attached to a bracket 30 that is fixed to the bracket 30, and a shaft 25 resists a spring 24. The operating piece 29 and the reference pins (hereinafter referred to as pins) 23A to 23D are fixedly attached to the shaft 25.

In the case where four corner cuts of the glass 2 are performed by the chamfering machine having the above-described structure (the front end corner cut will be described, and the rear end corner cut will be limited to a portion different from the front end corner cut). (Shown in parentheses), as follows. Constant speed V ₁ with appropriate spacing in Fig. 2 and Fig. 4.
When the front end 2a (rear end 2b) of the glass 2 conveyed at is detected by the limit switches 32B and 32D (32A and 32C), the air cylinder 31 is activated by this detection signal to operate the pins 23B and 23D (23A). And 23C) sequentially descend. Simultaneously with this descent, the carriages 19B and 19D (19A and 19C) start in the traveling direction of the glass 2 at a speed V ₃ (faster speed V ₂ ) slower than the glass speed V ₁ . Therefore, the tip 2a of the glass at the speed V ₁ catches up and the pins 23B and 23
Proximity sensor 2 when it contacts D (the rear end 2b of the glass of speed V ₁ is caught and pins 23A and 23C come into contact) and further advances
6B and 26D (26A and 26C) are activated, and truck 19B
And the speed V ₃ (V ₂ ) of 19D (19A and 19C) is made the same as the glass speed V ₁ .

Thus, the carriages 19B and 19D (19
A and 19C) and the glass 2 are run in synchronization with each other, and the wheels 10B and 10D (10A and 10C) are extruded in the y-axis direction to perform corner cutting and orientation flat cutting (wheel 10A in FIG. 4). At the time of these cuts, the tips of the shafts 25B and 25D (25A and 25C) just hit the stoppers 28B and 28D (28A and 28C),
The distance do between these members 28A-D and 25A-D is adjusted. This distance do is a distance that the pins 23 and the glass 2 contact at different speeds, and the pins 23A to 23D move before the members 23A to 23D and the glass 2 travel in synchronization with each other (referred to as a reference value). 9). At the time of cutting, spindle motor 9A
And 9D rotate right (clockwise), and 9B and 9C rotate left (counterclockwise) (arrow of wheel 10 in FIG. 3).

[0007]

The speed V _{3 in} FIG. 4 and FIG. 9 is to be solved.
After the pin 23 of V ₂ comes into contact with the front end 2a or the rear end 2b of the glass, the proximity sensors 26A to 26D act and the trolley 1
By setting the conditions in advance, the distance do (the area of the shaded portion in the velocity diagram of FIG. 9) that the glass 2 travels with the pin 23 until the velocity of 9A to D coincides with the velocity V ₁ of the glass. Calculated by calculating the tip of shafts 25A to 25D and stopper 18A
The distance from ~ D is adjusted to this distance do. However, the distance do slightly fluctuates due to the variation in the operation difference between the electrical system and the mechanical system after the pin 23 hits the glass 2, and this variation changes the distance da, b between the pin 23 and the wheel 10,
In some cases, the corner cut dimensions "a" and "b" were varied, and the corner cut dimensions did not fall within the dimensional tolerance ± c.

Next, since the carriages 19A to 19D are transferred by the air cylinder 33, the movement is not smooth due to a shock. Further, the speed control of the air cylinders 33A-D is performed by switching a plurality of variable throttle valves so that the carriages 19A-D are accelerated by the limit switch 32 and the proximity sensors 26A-D achieve the glass speed. It was difficult to perform such speed control with good responsiveness. The present invention has very little variation in the dimensions of the cut corners of the glass,
It is intended to provide a high-precision glass chamfering machine.

[0009]

For this reason, the present invention is provided with a wheel that cuts the front and rear corners of a rectangular glass that runs at a constant speed when it passes through a preset position. After accelerating two stationary front and rear bogies to speeds slower and faster than the speed of the glass respectively, and after the reference spins of these front and rear bogies contact the front and rear ends of the glass, When the speeds of these carriages are synchronized with the speeds of the glass, in the glass plate chamfering machine for corner cutting the front end and the rear end of the glass by the wheels installed on these carriages, the reference spin of each carriage is Sensor that linearly detects the position of the vehicle, and control that corrects the position of the reference spin of each dolly so as to take the set reference position by the signal from this displacement sensor. Those formed by providing a location, it is an unit for which a problem solution.

[0010]

[Operation] The servo motor starts the truck by the signal of the limit switch and accelerates it to a predetermined speed, and when the truck speed reaches the glass speed and the synchronous speed by the signal from the proximity sensor, the displacement sensor detects each truck The position of the pin is detected. Therefore, the actual size of the distance da, b between the pin and the center of the wheel of each carriage in the running direction of the glass is known. The cut dimensions a and b are determined by the distances da and b and the wheel movement angle θ (FIG. 4). These dimensions a and b
Tolerance ± c is set for each of the above, but if the actual dimensions of the distances da, b vary, the dimensions a and b may not fall within the tolerance ± c. I do. When a signal from the displacement sensor indicating the actual size of the distance da, b is input to the control device, the control device stores a reference distance reference value do stored in the device in advance,
When the actual dimensions of the distances da and b are compared with each other and a difference is generated, a correction command is issued and the rotation amount and the rotation direction of the servo motor for driving the carriage are adjusted so that the distance between the pin and the wheel center becomes the distance do. To control.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments of the drawings. FIG. 1 is a side view of a glass plate chamfering machine according to the embodiment of the present invention. In FIG. 1, the same parts as those in FIGS. 2 to 4 are designated by the same reference numerals. 2 is glass, 6 is a glass conveyor, 7 is a lower belt, 8 is an upper belt,
These are the same as the conventional ones. Further, 19 is a dolly, in which the bracket 15 and the bracket 46 of the elevating device 45 are fixedly mounted, and the arm 48 to which the pin 23 is fixedly attached is moved up and down by the air cylinder 47. Again dolly 1
9 is a ball screw 4 that is screwed into a screw portion 49 of the cart 19.
The servo motor 43 reciprocates in the traveling direction of the glass 2 via the motor 4.

Further, on the bracket 15 shown by the one-dot chain line,
A spindle motor 9 and a wheel 10 are attached as shown in FIGS. Further, the proximity sensor 26 is mounted on the support base 50 that moves up and down by the air cylinder 47 so that the set position thereof can be adjusted, and the displacement sensor 41 is fixed. Further, the shaft 25 fixed to the moving table 51 is provided so as to be able to move against the spring 24, and the moving table 51 fixed with the operating piece 29 is
The arm 4 is mounted on the support base 50 by the slide bearing 52.
Move with 8.

As explained in FIG. 4, the front end 2a of the glass is
Alternatively, the rear end 2b comes into contact with the pin 23, the pin 23 further advances with the glass, and the proximity sensor 2 moves in conjunction with the pin 23.
When 6 is operated, the speed V ₃ or V ₂ of the carriage 19 is made to be the constant speed V ₁ of the glass 2. When the carriage 19 and the glass 2 reach the synchronous speed in this way, the displacement sensor 41 detects the position of the tip of the shaft 25 that moves together with the movement of the pin 23, so that the distance between the tip of the shaft 25 and the deformation sensor 41. d, and therefore the distances da and db in the direction of travel of the glass 2 between the pin 23 and (the center of) the wheel 10 are known.

Next, when the tip position of the shaft 25 detected by the displacement sensor 41 is input as a signal to the control device 42, the device 42 preliminarily stores a reference value in the device 42 and the wheel. Glass 2 with 10
If there is a difference as compared with the distance do in the traveling direction, the correction command is issued so that the distances da and db between the pin 23 and the wheel 10 become the reference value do, and the rotation of the servomotor 43 for driving the carriage 19 is performed. Control the number and its direction of rotation. When the above correction is performed and the distances da and db between the pin 23 and the wheel 10 reach the reference value do, the wheel 10 moves in the y-axis direction so that the four corners of the glass 2 become the dimensions a and b. Cut into. These dimensions are provided with a dimensional tolerance of ± c and, as described above, the distances da and db between the pin 23 and the wheel 10 are corrected and controlled so as to become the reference value do, so that the cut dimensions a and b. Is extremely small and is within the range of the tolerance ± c.

[0015]

As described above in detail, according to the glass plate chamfering machine of the present invention, the distance between the pin and the center of the wheel in the running direction of the glass is a displacement sensor for detecting this distance, and this displacement sensor. A signal input from the controller and a reference value of the distance stored in advance are compared with each other, and a control device that issues a command so that the distance becomes the reference value; By the servo motor which moves to the position of, it is possible to minimize the variation in the corner cut dimensions of the glass. The corner cut dimension is almost within the allowable tolerance, and the probability of falling within the allowable tolerance is 99.999% or more.

[Brief description of drawings]

FIG. 1 is a side view of a glass plate chamfering machine according to an embodiment of the present invention.

FIG. 2 is a side view of a conventional glass plate chamfering machine.

FIG. 3 is a plan view of FIG.

FIG. 4 is a plan view of the reference spin, the proximity sensor, and the stopper of FIG.

5 is a sectional view taken along line Z-Z in FIG.

FIG. 6 is a detailed plan view of the spindle motor portion in FIG.

FIG. 7 is a side view of FIG.

8 is a side view of a wheel head to which the spindle motor of FIG. 6 is attached.

FIG. 9 is a velocity diagram of a pin.

[Explanation of symbols]

 2 Glass 6 Glass conveyor 10 Wheel 18 Cart 23 Pin 25 Shaft 26 Proximity sensor 41 Displacement sensor 42 Controller 43 Servo motor θ Corner cut angle a, b Corner cut dimension c Tolerance d Distance

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Fujioka 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries, Ltd. Mihara Manufacturing Co., Ltd. Co., Ltd. (72) Inventor, Hiroshi Toda 1-1, Kotobukicho, Mihara-shi, Hiroshima Mihara Rishige Engineering Co., Ltd. Within

Claims (2)

[Claims] 1. When the rectangular glass traveling at a constant speed passes a preset position, it is stationary with wheels for cutting the front and rear corners of the glass.
The front and rear carriages of each carriage are accelerated to speeds slower and faster than the speed of the glass, respectively, and the reference spins of the front and rear carriages come into contact with the front and rear ends of the glass, and then the speeds of the carriages are changed. When synchronized with the speed of the glass, in the glass plate chamfering machine that performs the corner cutting of the front end and the rear end of the glass by the wheels installed in these carriages, the position of the reference spin of each of the carriages becomes linear. A glass chamfering machine comprising: a displacement sensor for detecting; and a control device for correcting the position of the reference spin of each dolly so as to take a set reference position by a signal from the displacement sensor. 2. The glass plate chamfering machine according to claim 1, further comprising a servomotor for driving each of the carts.