JPH06179164A - Polishing device for image display surface of display device - Google Patents

Abstract

PURPOSE:To surely prevent the adhesion of polishing agent at the part other than an image display surface by allowing the image display surface of an image display part to be exposed downward from an exposure port formed on a placing plate and grinding the image display surface from the underside of the placing plate by a polishing head. CONSTITUTION:A polishing device is formed to a box body 6 from a frame 2 which is horizontally supported by legs 1 and a placing plate 5 which is supported through a side plate 3 on the upper side of the frame 2 and places a display device 4. The image display surface 4a of the display device 4 is exposed downward from the exposure port 3a of the side plate 3. At the same time, the contact part 7b of a sealing member 7 is springily attached on the periphery of the image display surface 4a. Then, a polishing head 37 is turned and shifted by operating a drive control operation part 40, and the image display surface 4a is polished from the underside. Though, at this time, the polishing agent supplied from a rotary coupling 38 is splashed, accompanied with the revolution of the polishing head 7, the adhesion of the polishing agent on the part other than the image display surface 4a can be prevented surely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing device for polishing an image display surface (glass surface) of a display device such as a liquid crystal panel or a television Braun tube.

[0002]

2. Description of the Related Art Conventionally, when a flaw is found on an image display surface in a final visual inspection in the manufacturing process of a display device such as a liquid crystal panel or a cathode ray tube for a television, an operator polishes it by using a hand polisher or the like. , The scratch on the image display surface was removed.

[0003]

As described above, it takes a lot of time and labor for the worker to work with the hand polisher or the like, and the work efficiency is low. In addition, since the abrasive scatters during the work, the working environment is bad, and the abrasive easily adheres to unnecessary parts other than the image display surface, which is unnecessary in a liquid crystal panel after liquid crystal encapsulation or a cathode ray tube after attaching an electron gun. If the polishing agent adheres to the portion, there is a problem that it is difficult to clean after the polishing.

Therefore, an object of the present invention is to provide a polishing device for an image display surface in a display device which can solve the above problems.

[0005]

A means for solving the problems in the present invention is a mounting plate which is arranged on an upper side of a gantry for mounting an image display portion of a display device, and an image display formed on the mounting plate. Exposure port for exposing the display surface of the unit downward, a first guide rail provided on the gantry and arranged substantially parallel to the image display surface exposed at the exposure port, and moved to the first guide rail A first moving body provided freely, a first moving means for moving the first moving body, and a first guide rail provided on the first moving body and substantially parallel to an image display surface. A second guide rail arranged in a right angle direction,
A second moving body movably provided on the second guide rail, and a second moving means for moving the second moving body,
A third guide rail vertically arranged on the second movable body, a third movable body movably provided on the third guide rail, and a third moving means for moving the third movable body up and down. And a polishing tool provided on the third moving body for polishing the image display surface exposed at the exposure port.

[0006]

In the above structure, the image display portion of the display device is placed on the placing plate so that the image display surface faces downward and is exposed from the exposure opening, and the first moving means is driven to drive the first image. The moving body is moved on the first guide rail substantially parallel to the image display surface, and the second moving means is driven to move the second moving body on the second guide rail substantially parallel to the image display surface and at the first guide rail. And the third moving member is moved up and down on the third guide rail by driving the third moving means, and the polishing tool is applied to the image display surface exposed from the exposure opening to polish. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a polishing device for an image display surface in a display device according to the present invention will be described below with reference to an overall vertical front view of FIG. 1, an overall vertical side view of FIG. 2, an overall plan view of FIG. 3, and an image display surface of FIG. Will be described with reference to a vertical cross-sectional view exposed from the exposure port.

The polishing apparatus of the present invention is used to mount a pedestal 2 horizontally supported on a leg 1 and a liquid crystal panel (an example of a display device) 4 which is arranged above the pedestal 2 via a side plate 3. A box body 6 including a mounting plate 5 is provided, and is formed at a suitable position of the mounting plate 5 to be slightly smaller than the image display surface 4a of the liquid crystal panel 4 so that the image display surface 4a is located below (the pedestal 2). Side) to expose. A rectangular exposure port 3a is provided.

As shown in FIG. 4, the mounting plate 5 outside the exposure opening 3a is cut out to form a stepped surface 5a, and the peripheral portion of the image display surface 4a is placed on the stepped surface 5a. ing. Although not shown, the mounting plate 5 is provided with fixing means for holding the liquid crystal panel 4. Further, when the liquid crystal panel 4 is placed, a seal member 7 is provided that comes into contact with the periphery of the image display surface 4a, and the seal member 7 is made of, for example, fluororubber, and is fixed to the rear surface of the mounting plate 5 described above. When,
The contact portion 7b is formed integrally with the fixing portion 7a and protrudes from the exposure opening 3a in the angle suppressing direction.

Further, as shown in FIG. 1, a pair of members are arranged on the upper surface of the pedestal 2 in a direction substantially parallel to the image display surface 4a exposed in the exposure opening 3a, that is, in the front-rear direction A so as to be laterally separated from each other. A first guide rail R1 is fixed, and a first moving body 10 having a standing wall 9 having a rectangular shape in a front view, which is fixed to the lower table 8, is movably attached to the first guide rail R1 via a first sliding piece 11. First moving means 12 for moving the first moving body 10 in the front-rear direction A along the first guide rail R1 is provided.

The first moving means 12 is arranged at substantially the center of the lower table 8 in the left-right direction, and has a first screw rod 14 whose front and rear ends are rotatably supported on the frame 2 via first brackets 13. A first motor M1 fixed to the pedestal 2 adjacent to the first screw rod 14, and externally fixed to the end of the first screw rod 14 and the motor shaft 15 of the first motor M1. The first pulleys P1 and P1, the first belt 16 wound around the first pulleys P1 and P1, the first belt 16 fixed to the back surface 8a of the lower base 8 and screwed to the first screw rod 14. It is composed of a guide piece 17.

A pair of second guides are arranged on the front surface 9a of the standing wall 9 in a direction substantially parallel to the image display surface 4a and at a right angle to the first rail R1, that is, in the left-right direction B and are vertically spaced from each other. The rail R2 is fixed, and a plate-shaped second moving body 18 arranged in parallel to the standing wall 9 on the second guide rail R2 on the front side of the standing wall 9 is movably mounted via a second sliding piece 19. A second moving means 20 for moving the second moving body 18 in the left-right direction is provided.

The second moving means 20 is arranged in the left-right direction between the standing wall 9 and the second moving body 18, and both left and right ends thereof are rotatably supported by the standing wall 9 via the second brackets 21. A second screw rod 22, a second motor M2 fixed to the back surface of the standing wall 9, and a second motor M2 fixed to the end of the second screw rod 22 and a motor shaft 24 of the second motor M2 by external fitting. The pulleys P2 and P2 and the second pulleys P on both sides
2, a second belt 25 wound around P2, and a second guide piece 26 fixed to 18a on the back surface of the second moving body 18 and screwed into the second screw rod 23. .

Further, a pair of third guide rails R3, which are spaced apart from each other in the vertical direction C in the vertical direction C, are fixed to the front surface 18a of the second moving body 18, and the third guide rail R3 is moved to the third position. A body 27 is movably attached via a third sliding piece 28.

The third moving body 27 is disposed on the front side of the second moving body 18, and has a motor box 31 in which a polishing motor M for rotating a vertical rotation shaft 30 of a polishing tool 29, which will be described later, is installed, and the motor box 31. A polishing tool 29 fixed to the front surface of the box 31 and polishing the image display surface 4a exposed at the exposure opening 3a.
And a polishing tool support frame 32 for supporting the above, and a third moving means 33 for moving the third moving body 27 in the vertical direction C is provided.

The third moving means 33 is an air cylinder 3 fixed to the front surface 18a of the second moving body 18 substantially at the center thereof.
4 and the second moving body 18 from the upper end of the motor box 31.
Rod 34a of the air cylinder 34.
The upper end of the and the projecting piece 35 are connected.

The above-described polishing tool 29 has the vertical rotation shaft 30.
Supporting member 36 which is rotatably supported and is fixed to the supporting frame 32, a polishing head (grinding stone) 37 which is fixed to the upper end of the vertical rotating shaft 30, and a vertical rotating unit which is attached to the lower end of the vertical rotating shaft 30. It is composed of an abrasive feed pipe rotary joint 38 arranged at the upper end of the shaft 30. Further, a pulley P is externally fitted and fixed to an intermediate portion of the vertical rotation shaft 30, and the pulley P is attached to the motor shaft Ma of the polishing motor M.
Is fitted and fixed, and a belt 39 is wound around both pulleys P, P.

A drive control operation unit 40 for outputting a drive control signal to each drive unit of the first motor M1, the second motor M2, the polishing motor M, and the air cylinder 34 is provided on the upper portion of the box body 6. In addition, the operation unit 40 can specify the polishing range of the image display surface 4a.

Reference numeral 41 in FIG. 2 denotes a tray for receiving the polishing agent after polishing on the gantry 2. In the above configuration, when a flaw is found on the image display surface 4a in the visual inspection in the manufacturing process of the image display portion 4 of the display device, the operator asks where the flaw is on the image display surface 4a of the image display portion 4. After confirming, the image display surface 4a is positioned so that the image display surface 4a is exposed downward from the exposure opening 3a, and the image display surface 4a is mounted on the mounting plate 5. Further, the image display section 4 is fixed by the fixing means provided on the mounting plate 5. Then, the contact portion 7b of the sealing material 7 elastically contacts the periphery of the image display surface 4a.

Next, the operator operates the drive control operating unit 40 to specify the polishing range including the scratch position confirmed in advance,
Turn on the drive switch. Then, the polishing motor M is driven to rotate the polishing head 37, and the first motor M1 and the second motor M2 are driven so that the polishing head 37 is located below the polishing range. The two moving bodies 18 are respectively provided with a first guide rail R1 and a second guide rail R2.
Along the third guide rail R3, the third moving body 27 slowly rises, the rotating polishing head 37 abuts the image display surface 4a with an appropriate pressing force, Further, the first motor M1 and the second motor M2 are driven to move the polishing head 37 within the polishing range. During the polishing operation, the polishing agent is supplied to the contact portion between the polishing head 37 and the image display surface 4a through the rotary joint 38 for the polishing agent supply pipe.

By the way, although the polishing agent is scattered by the rotation of the polishing head 37, since the contact portion 7b of the sealing material 7 is elastically contacted with the periphery of the image display surface 4a, the image display of the image display portion 4 is performed. The abrasive does not scatter and adhere to the portion other than the surface 4a.

As described above, when the image display surface 4a is scratched in the visual inspection in the manufacturing process of the display device, the operator mounts the image display unit 4 on the mounting plate 5 and the drive control operation unit 40. Image display surface 4a automatically by simply operating
Since the abrasive is polished, the scratches on the image display surface 4a can be easily removed without the need for manpower, and the abrasive scatters only in the box body 6. Therefore, the abrasive does not scatter to the operator. Since the abrasive agent does not adhere to the portion other than the image display surface 4a, it is not necessary to wash the portion other than the image display surface 4a, and the work efficiency is significantly improved.

The present invention is not limited to the above-mentioned embodiment, but two sets of mechanisms for moving the polishing tool in the front-back, left-right and up-down directions are provided, and each mechanism is provided with the polishing tool, and each polishing tool has a count. Different polishing heads 37 may be attached. At this time, a polishing head is provided on one of the polishing tools,
A cleaning head may be provided on the other polishing tool.

In the above embodiment, the image display surface 4a
However, the present invention is not limited to this and the image display surface 4 such as a cathode ray tube for a television is used.
Even if a is formed of a curved surface, it can be used. In this case, during polishing, the first motor M1, the second motor M2, and the air cylinder 34 are appropriately driven to adjust the polishing head 37 according to the curved surface.
Is raised and lowered, and the polishing head 37 is always pressed with an appropriate pressing force.
Is applied to the image display surface 4a and polished.

[0025]

As is apparent from the above description, the present invention is
An exposure port is formed on the mounting plate provided on the upper side of the gantry, the image display unit is mounted so that the display surface is exposed at the exposure port, and the image display surface is polished from the lower side of the mounting plate. Abrasive does not scatter and adhere to parts other than the image display surface, so cleaning of parts other than the image display surface becomes unnecessary, and the polishing tool is moved in a direction parallel to the image display surface and at a right angle to each other. At the same time, it is moved vertically and automatically polished, so the work efficiency can be greatly improved.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional front view of a polishing apparatus according to an embodiment of the present invention.

FIG. 2 is likewise a side view of the entire vertical section.

FIG. 3 is an overall plan view of the same.

FIG. 4 is an enlarged vertical sectional view in which the image display surface is also exposed from the exposure port.

[Explanation of symbols]

 2 Stand 3 Side plate 3a Exposure port 4 Liquid crystal panel 4a Image display surface 5 Mounting plate 9 Standing wall 10 First moving body 12 First moving means 14 First screw rod 18 Second moving body 20 Second moving means 22 Second screw rod 29 Polishing tool 33 Third moving means 37 Polishing head 40 Drive control operation unit A Front-rear direction B Left-right direction C Up-down direction M Polishing motor M1 First motor M2 Second motor R1 First rail R2 Second rail R3 Third rail

Claims (1)

[Claims] 1. A mounting plate which is disposed on an upper side of a gantry and on which an image display unit of a display device is mounted, and a display surface of the image display unit formed on the mounting plate is exposed downward. An exposure opening, a first guide rail provided on the gantry and arranged substantially parallel to the image display surface exposed at the exposure opening, a first moving body movably provided on the first guide rail, First moving means for moving the first moving body, and a second guide rail provided on the first moving body and arranged substantially parallel to the image display surface and in a direction perpendicular to the first guide rail. A second moving body movably provided on the second guide rail, a second moving means for moving the second moving body, and a third guide vertically arranged on the second moving body A rail, a third movable body movably provided on the third guide rail, and a third transfer body. An image display surface in a display device, comprising a third moving means for moving up and down the moving body, and a polishing tool provided on the third moving body and polishing the image display surface exposed at the exposure port. Polishing equipment.