JPH0542601Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for cleaning the edge of a panel for a color cathode ray tube, and in particular, when cleaning the edge of the panel, damage to the screen due to scattering of the cleaning agent is avoided. The present invention relates to a panel edge cleaning device for a color cathode ray tube that is improved so as to be able to effectively prevent the edges from being damaged.

<Prior art> The inner surface of the cathode ray tube panel absorbs external light and isolates each fluorescent stripe at regular intervals to improve color contrast and purity.
Black Matrix improves
matrix) is formed. During the process of forming the black matrix, graphite slag is deposited on the edges of the panel, and is removed during a subsequent cleaning process.

As shown in FIGS. 1 and 2, the cleaning device for this purpose cleans the outer wall 11 along the edge of the base 10.
An intermediate wall 12 lower than the outer wall 11 and an inner wall 13 having approximately the same height as the outer wall 11 are formed at regular intervals.
One or more cleaning liquid inflow pipes 21 are provided on the bottom surface between the inner wall body 13 and the intermediate wall body 12,
One or more discharge pipes 22 are provided at the bottom between the intermediate wall 12 and the outer wall 11.

In such a cleaning device, cleaning liquid is supplied through an inflow pipe 21, and after cleaning of the edge P' of the panel P is completed through contact with the cleaning liquid, the cleaning liquid is recovered through a discharge pipe 22. There is. At this time, the area where the cleaning solution accumulates is the edge of the panel.
This is the space between the inner wall 13 and the intermediate wall 12 where P' is located, and the excessively supplied cleaning liquid overflows the intermediate wall 12 and is located between the outer wall 11 and the intermediate wall 12. It is designed to flow out to the bottom. The cleaning liquid flows through the inflow pipe 21 until the panel P reaches the upper part of the cleaning device by a predetermined moving means, and the edge P' of the panel P is connected to the intermediate wall 12 and the inner wall 13. The amount of cleaning liquid supplied at one time through the inflow pipe 21 is such that it does not exceed the amount of cleaning liquid supplied to the inner wall body 13 and the outer wall body 11, and after a suitable time has passed, the cleaning liquid is supplied through the discharge pipe 22. be collected again.

<Problem to be solved by the invention> When the cleaning liquid is supplied in the above order, it is possible to supply a large amount of cleaning liquid at once between the inner wall body 13 and the intermediate wall body 12 via the cleaning liquid supply device. Become. The cleaning liquid that flows in at this time comes into contact with the inner and outer surfaces of the panel edge and rises, and if the height rises above a certain level, the cleaning liquid will exceed the intermediate wall, but the inflow speed of the cleaning liquid Since the cleaning liquid is large, the impact generated when the cleaning liquid comes into contact with the edge of the panel causes the cleaning liquid to scatter. Furthermore, when the liquid level of the cleaning liquid increases continuously, a difference occurs between the liquid level on the outside surface of the panel edge exposed to the outside and the liquid level on the inside surface of the closed panel edge. become. This is due to an instantaneous pressure difference between the inside and outside of the panel, which further aggravates the above-mentioned scattering phenomenon of the cleaning liquid. Such a scattering phenomenon results in damage to the black matrix formed on the inner surface of the panel.

Therefore, the object of the present invention is to provide an improved edge of a color cathode ray tube panel that can effectively prevent damage to the screen, especially damage to the black matrix, caused by splashing of cleaning liquid when cleaning the edge of the panel. The department provides cleaning equipment.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a panel edge for a color cathode ray tube in which a cleaning liquid is brought into contact with the panel edge to dissolve and remove the slag attached to the panel edge. In the cleaning device, the cleaning liquid is supplied through an inlet pipe provided on the outside of the panel edge so that it comes into contact with the panel edge, and the cleaning liquid that has been in contact with the panel is directly below the panel edge and at the edge of the panel. The feature is that they are collected together through outflow pipes provided on the inside.

<Function> In the cleaning device according to the present invention, after the cleaning liquid is supplied from the outside of the edge of the panel, the cleaning liquid is recovered through the outflow pipe directly below the edge of the panel and inside the edge, so that the cleaning liquid is rapidly removed. Since the cleaning liquid droplets scattered from the inflowing cleaning liquid can only fly to the outer surface of the edge of the panel, there is no need to worry about damage to the black matrix due to the splashing of the cleaning liquid. Furthermore, since no air pressure difference is generated between the inside and outside of the edge of the panel when the cleaning liquid flows in, the scattering phenomenon of the cleaning liquid due to the air pressure difference is prevented.

<Embodiment> Hereinafter, one embodiment of the present invention will be described in detail with reference to FIG.

Low walls 32, 33 that closely surround the edge P' of the panel P are formed at regular intervals on the edge of the base 30;
High walls 31 and 34 are formed on both outsides of the panel P, and at the upper end of the high wall 34 inside the panel P,
A flange-shaped skirt 35 is formed. On the other hand, a cleaning liquid inflow pipe 2 is provided on the bottom surface between the outer high wall 31 and the adjacent low wall 32 of the panel P.
1 is located on the bottom surface between the two low walls 32 and 33 directly below the edge P' of the panel P, and on the bottom surface between the inner high wall 34 and the adjacent low wall 33. Cleaning liquid outflow pipes 22a and 22b are located.

In the cleaning device of the present invention configured in this way, the cleaning liquid is introduced from the bottom of the base isolated outwardly from the edge of the panel, and then flows toward the center of the base. When supplying
The impact caused by the sudden inflow of the cleaning liquid is alleviated in the area A defined by the outer high wall 31 and the adjacent low wall 32. The cleaning liquid is then applied to the central B formed by the two low walls 32, 33 and where the panel edges are located.
area, low wall 33 and high wall 3 inside the panel
The water flows into the C region formed by 4 and 4 in a relatively quiet state.

In this way, when the cleaning liquid flows into area A through the inflow pipe and flows into areas B and C, minute cleaning liquid droplets may fly onto the inner surface of the panel due to an unexpected impact, etc. A skirt 35 is provided at the upper end of the inner high wall 34.
It becomes blocked by.

<Effects of the invention> The cleaning device of the present invention as described above is constructed so that the continuous flow of the cleaning liquid is very quiet, and the path through which the cleaning liquid flows is blocked off from the inside surface of the panel by a skirt. This effectively prevents damage to the black matrix due to splashing of cleaning fluid.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a conventional color cathode ray tube cleaning device, FIG. 2 is a partially enlarged view of the cleaning device shown in FIG. 1, and FIG. 3 is a schematic diagram of the color cathode ray tube cleaning device of the present invention. The sectional view, FIG. 4, is a partially enlarged view of the cleaning device shown in FIG. 3. 21...Inflow pipe, 22a, 22b...Outflow pipe,
30... Base, 31, 34... High wall, 3
2, 33...low wall, 35...skirt.

Claims (1)

[Claims for Utility Model Registration] (1) In a panel edge cleaning device for a color cathode ray tube, which brings cleaning liquid into contact with the edge of the panel to dissolve and remove slag attached to the edge, the inside and outside of the edge of the panel A high wall that surrounds the side surfaces at a high height at a certain distance is formed on a plate-shaped base, and a low wall that is located between the high walls and surrounds the inner and outer sides of the panel edge at a low height. is formed on the base, and a cleaning liquid inflow pipe is provided on the bottom between a high wall on the outside of the panel edge and a low wall opposite thereto, and a cleaning liquid inflow pipe is provided between the low wall where the panel edge is located. A panel edge cleaning device for a color cathode ray tube, characterized in that cleaning liquid outflow pipes are provided on the bottom surface of the panel and on the bottom surface between a high wall on the inside of the panel and a low wall that opposes it. (2) A flange-shaped skirt close to the edge of the panel is formed at the upper end of the high wall located inside the panel, so that droplets of the cleaning liquid splashed from the cleaning liquid on the bottom surface can be 2. The panel edge cleaning device for a color cathode ray tube according to claim 1, wherein the device is blocked by a skirt.