JPS61264633A - Panel inner face cleaning device - Google Patents

Abstract

PURPOSE:To improve supersonic cleaning efficiency by arranging overflow drain at the inside of panel in cleaning tank. CONSTITUTION:Overflow drain 25 is arranged at the inside of panel 24. The wave 27 produced at the inside of panel 24 through cleaning rotation of panel 24, will drop and absorbed to the overflow drain 25 thereby never interface with the wave 27 to be produced later thus to maintain stable water level and to clean the inner face of panel 24 uniformly. Since the cleaning liquid 22 in the cleaning tank 21 is not required to flow in the rotary direction of panel 24, supersonic wave from supersonic vibrator 20 is never cancelled resulting in improvement of the cleaning efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a panel inner surface cleaning device E for cleaning the inner surface of a panel by immersing the skirt portion of the panel in a cleaning liquid E in a cleaning tank equipped with an ultrasonic vibrator.

[Background of the invention]

In the panel coating process for cathode ray tubes for displays, the inner surface of the panel is cleaned using a cleaning device equipped with an ultrasonic vibrator.

Conventionally, as a cleaning device, for example, Japanese Patent Application Laid-Open No. 54-1125
62 and Japanese Unexamined Patent Publication No. 57-95041 are known. However, these methods do not clean the inner surface of the panel, which is the subject of this application.

As a conventional panel inner surface cleaning device, the one shown in FIG. 1 is generally used. A drain tank 3 for moss overflow is provided on the outer periphery of the cleaning tank 2 with the ultrasonic vibrator 1. Further, a supply nozzle 5 for supplying the cleaning liquid 4 is arranged inside the cleaning tank 2 .

Therefore, the skirt portion of the panel 6 is immersed in the cleaning liquid 4, and the cleaning liquid 4 is supplied into the cleaning tank 2 from the supply port 8 through the supply nozzle 5 while rotating the panel 6 in the direction of the arrow 7 f. The cleaning liquid 4 overflowing from the cleaning tank 2 passes through the overflow drain tank 3 and is discharged to the outside from the discharge port 9.

During this cleaning, as the panel 6 rotates, ripples 10a110b occur on the inside and outside of the panel 6.

When the ripples IOa occur on the inside of the panel 6 in this way, the inner surface of the panel 6 cannot be evenly cleaned. Therefore,
In order to reduce the ripples 10a during cleaning, the supply nozzle 5
Aim the nozzle opening in the direction of rotation 7I of the panel 6, and clean the cleaning tank 2.
The flow of water inside is caused in the direction of arrow 11. However, this method does not stabilize the liquid level due to the flow of water.
There is a problem that the ultrasonic waves generated by the ultrasonic transducer I are attenuated and the ultrasonic cleaning efficiency is poor.

[Purpose of the invention]

An object of the present invention is to provide a panel inner surface cleaning device with excellent ultrasonic cleaning efficiency.

[Summary of the invention]

According to a first embodiment of the present invention, an overflow drain is provided inside the cleaning tank so as to be located inside the panel. This allows the ripples on the inside of the panel that occur as the panel rotates during cleaning to fall into the overflow drain provided inside the panel, preventing wave interference.
A stable liquid level can be maintained, the inner surface of the panel can be evenly washed, and efficiency can be greatly improved.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 2. The cleaning tank 21 with the ultrasonic transducer 20 has a supply port 23 for supplying the cleaning liquid 22 inside. Inside the cleaning tank 21,
An overflow drain 25 is provided so as to be located inside the panel 24. Although not shown, the cleaning liquid 22 is supplied into the cleaning tank 21 at a constant rate through a flow meter, and is normally overflowed through an overflow valve 25. In addition, in the figure, 26 indicates an air bleed.

As described above, since the overflow drain 25 is provided inside the panel 24, the waves 27 generated inside the panel 24 as the panel 24 rotates during cleaning fall into the overflow drain 25I and are absorbed. As a result, a stable water surface is maintained without interfering with waves 27 generated subsequently, and the inner surface of the panel 24 is uniformly cleaned. Further, since there is no need for the flow of the cleaning liquid 22 in the cleaning tank 21 to be aligned with the direction of rotation of the panel 24, the ultrasonic waves of the ultrasonic vibrator 20 are not attenuated and the cleaning efficiency is greatly improved.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the liquid level during panel cleaning is stabilized, the inner surface of the panel is evenly cleaned, and the cleaning efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 shows a conventional panel inner surface cleaning device, tal is a top view, (b) is a side sectional view, and FIG. 2 is a side sectional view showing an embodiment of the panel inner surface cleaning device according to the present invention. 20... Ultrasonic vibrator, 21... Cleaning tank, 2
2...Cleaning liquid, 24...Panel, 25
...Drain for overflow. Agent: Patent Attorney Katsutoshi OgawaFigure 1Figure 2

Claims (1)

[Claims] A panel inner surface cleaning device that cleans the inner surface of a panel by immersing the skirt portion of the panel in a cleaning solution in a cleaning tank equipped with an ultrasonic vibrator, is characterized by an overflow drain installed in the cleaning tank so as to be located inside the panel. Panel inner surface cleaning equipment.