JPH05159704A - Method of cleaning outer surface of panel in process of exposing cathode-ray tube to light and apparatus for cleaning outer surface - Google Patents

Abstract

PURPOSE:To provide a method of cleaning the outer surface of a panel and a unit thereof in order to remove a stain on the outer surface of the panel, which is produced in the process of exposing the outer surface of the panel of a cathoderay tube to light to cause failure of phosphor on the inner surface of the panel. CONSTITUTION:The inner part of a panel composing a cathode-ray tube (CRT) is coated with phosphor to be exposed to light, and then the outer surface of said panel is wiped with a wet cloth at least once and then wiped with a dry cloth. This apparatus is provided with a transfer equipment 9 for transferring a panel 12, a panel clamping unit 10 for fixing the position of said panel 12, means 1, 2 for wiping with a wet cloth to clean the outer surface of said panel, a panel cleaning unit including means for wiping with a dry cloth, an actuator 8 for controlling the panel cleaning unit and a cleaning tank 11 for cleaning said panel cleaning unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for forming a phosphor screen of a panel constituting a cathode ray tube (CRT), and more particularly, to a preferable method for cleaning an outer surface of a panel after applying a phosphor on an inner surface of the panel and a method thereof. The present invention relates to a cleaning device.

[0002]

2. Description of the Related Art Conventionally, after a phosphor is applied to the fluorescent surface of a panel constituting a CRT, the panel inner surface exposure is performed from the inside of the panel instead of the panel outer surface exposure used in the present invention. There was no need to clean the outer surface of the panel.

[0003]

After the phosphor is applied to the inside of the panel constituting the CRT, if the outer surface of the panel is dirty when the phosphor is exposed from the outside of the panel, the Problems such as unevenness and falling of the phosphor occur. Contamination on the outer surface of the panel that causes this problem is carbon slurry, phosphor slurry, and the like attached in the steps up to the exposure of the outer surface of the panel.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a panel outer surface cleaning method and a panel outer surface cleaning device for removing dirt on the panel outer surface which causes a defect of the phosphor on the inner surface of the panel, which occurs in the step of exposing the outer surface of the panel of the CRT. And

[0005]

According to the present invention, the above-mentioned problem is solved by applying the phosphor to the inside of the panel constituting the cathode ray tube and then exposing the phosphor from the outside of the panel. In the method for cleaning the outer surface of the panel, the outer surface of the panel is wiped with water at least once by using some water wiping means and air wiping means, and then the air wiping is performed. And a transfer machine for transferring a panel constituting the cathode ray tube to a panel outer surface cleaning work place, a panel clamp device for locking the position of the panel, a panel cleaning device for cleaning the outer surface of the panel, and the panel cleaning device. And a cleaning tank for cleaning the panel cleaning device. It is solved by the panel outer surface cleaning apparatus.

[0006]

According to the present invention, the first water wiping means, which is one of the panel cleaning devices held by the actuator, is moved over the outer surface of the panel constituting the CRT to the outer surface of the panel. The dirt adhering to the outer surface is swollen to reduce the adhesion strength of the dirt, and then the second water wiping means which is one of the panel cleaning devices is replaced with the second water wiping means by the same operation as the first water wiping means. By moving the means to remove the dirt that has expanded by the wiping with the first water wiping means, and finally replacing the empty wiping means with the same operation as the first water wiping means to remove the dirt or water drops remaining on the panel surface. remove. In the present invention, since the number of times and the order of the water wiping and the air wiping are appropriately performed as described above, the dirt attached to the outer surface of the panel can be efficiently removed.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic view of a panel outer surface cleaning device, and FIG. 2 is a plan view of the device configuration. The panel outer surface device of the present invention is particularly shown in FIG. 1 (a) with three independent panel cleaning devices (first water wiping hand 1, second water wiping hand 2, empty wiping hand 3) and FIG. 1 (b). The actuator 8, the transfer machine 9 and the panel clamp device 10 shown
The cleaning tank 11 shown in FIG. 1C is used.

As shown in the plan view of the apparatus configuration of FIG. 2, a holding mechanism 7, an actuator 8, a transfer machine 9 and a panel 12 are arranged. The actuator 8 is connected to an actuator controller 16 and a control board 18 by a wiring duct 17. Connected, a first water wiping hand stand 13, a second water wiping hand stand 14, and an empty hand hand stand 15 are arranged, and the cleaning tank 11 is composed of a liquid level sensor 21, a hand material portion washing roller 20, and a squeezing roller 19. And placed.

The three panel cleaning devices are independent of each other, and as shown in FIG.
It is composed of a hand spring portion 5 and a hand material portion 6. The hand chuck part 4 and the hand spring part 5 are common to the three panel cleaning devices, and the hand material part 6 is the first
The water wiping hand 1 and the second water wiping hand 2 are made of a material sufficiently containing water (for example, sponge, cellulose filter paper, etc.), and the blank wiping hand 3 is a material that sufficiently absorbs water (for example, sponge, cellulose filter paper, chamois). Skin).

The actuator 8 clamps the hand chuck portion 4 of each panel cleaning device on the replacement mechanism portion 7 and presses the tip of the hand material portion 6 onto the outer surface of the panel.
It is a device that is moved back and forth and left and right, and after the operation is completed, returns the panel cleaning device to a predetermined position and replaces it with the next panel cleaning device.

The transfer machine 9 moves the panel from the work place of the phosphor coating process on the inner surface of the panel to the work place of cleaning the outer surface of the panel, or from the work place of cleaning the outer surface of the panel to the work place of the next panel outer surface cleaning. It is a moving device.

The panel clamp device 10 is a device for locking the panel at a predetermined position.

The cleaning tank 11 is a device for cleaning the hand material portion 6 of the first water wiping hand 1 and the second water wiping hand 2, and its detailed view is shown in FIG. It is composed of a material portion washing roller 20 and a liquid level sensor 21.

FIG. 5 is a process chart showing a method for cleaning the outer surface of the panel by using the panel outer surface cleaning device of FIG. An embodiment of the present invention will be described according to this process chart.

When the step of applying the phosphor to the inner surface of the panel, which is the step of FIG. 5A, is completed, the panel is transferred to the panel cleaning work place by the transfer machine 9 with the outer surface facing upward. , And is locked in place by the panel clamp device 10.

Next, the first water wiping means (first water wiping hand) in the step of FIG. 5B is used to perform the first water wiping.
First, the actuator 8 clamps the first water wiping hand 1 on the replacement mechanism unit 7 and moves it to the sky above the panel. The tip of the hand material portion 6 of the first water wiping hand 1 is pressed against the surface of the panel. Then, the dirt adhering to the outer surface of the panel is expanded to reduce the adhesion strength. After the movement of the outer surface of the panel is completed, the panel is returned to the first water wiping hand stand 13.

Next, the step of FIG. 5C is performed by the second water wiping hand 2 which is the second water wiping means. First, the second water wiping hand 2 is clamped by the actuator 8 to the replacement mechanism section 7, and the swollen dirt on the outer surface of the panel is removed by the same operation as that of the first water wiping hand 1. After the movement operation on the outer surface of the panel is completed, the panel is returned to the second water wiping hand stand 14.

Next, the step shown in FIG. 5 (d) is carried out by an empty wiping hand 3 which is an empty wiping means. First, the actuator 8
Further, the empty wiping hand 3 is clamped to the replacement mechanism section 7, and the same operation as that of the first water wiping hand 1 removes the dirt or water drops remaining on the outer surface of the panel. After the operation is completed,
Return to the empty hand stand 15.

Next, the step shown in FIG. 5E is performed. First, the transfer machine 9 moves the panel to the next panel external surface exposure work place. Then, the first water wiping hand 1 is clamped by the actuator 8, moved to the cleaning tank 11, the hand material portion 6 is washed by the hand material portion washing roller 20, the water is drained by the squeezing roller 19, and the first water wiping hand is Return to the stand 13. Next, the second water wiping hand 2 is also the first
The hand material portion 6 is washed by the same operation as the water wiping hand 1.

By the panel outer surface cleaning method using the above panel outer surface cleaning device, it becomes possible to cleanly remove the dirt attached to the panel outer surface.

[0022]

As described above, the cleaning of the outer surface of the panel, which is an indispensable step for realizing the new exposure method for the outer surface of the panel of the fluorescent surface of the CRT panel, can be realized well. The external surface exposure method was realized.

[Brief description of drawings]

FIG. 1 is a schematic view of a panel outer surface cleaning apparatus according to the present invention.

FIG. 2 is a plan view of a panel outer surface cleaning device according to the present invention.

FIG. 3 is a front view of a cleaning device which constitutes a panel outer surface cleaning device.

FIG. 4 is a detailed view of a cleaning tank constituting the panel outer surface cleaning device.

FIG. 5 is a process chart showing a method for carrying out the present invention.

[Explanation of symbols]

 1 1st water wiping hand 2 2nd water wiping hand 3 empty wiping hand 4 hand chuck part 5 hand spring part 6 hand material part 7 holding mechanism part 8 actuator 9 transfer machine 10 panel clamp device 11 cleaning tank 12 panel 13 1st Water wiping hand stand 14 Second water wiping hand stand 15 Empty wiping hand stand 16 Actuator controller 17 Wiring duct 18 Control panel 19 Squeezing roller 20 Hand material part washing roller 21 Liquid level sensor

Claims (2)

[Claims] 1. A method of applying a phosphor to be exposed to the inside of a panel constituting a cathode ray tube (CRT), wiping the outer surface of the panel at least once with water, and then wiping with air. A method for cleaning the outer surface of a panel in a cathode ray tube exposure process. 2. A transfer machine for transferring a panel constituting a cathode ray tube (CRT), a panel clamp device for fixing the position of the panel, a water wiping means for cleaning the outer surface of the panel, and an empty space. A panel outer surface cleaning device comprising: a panel cleaning device having a wiping means; an actuator for controlling the panel cleaning device; and a cleaning tank for cleaning the panel cleaning device.