JPS6252831A - Washing apparatus for sealing surface of cathode-ray tube envelope - Google Patents

Abstract

PURPOSE:To reduce the size of washing apparatus without lowering the washing effect by providing the mechanism where the moving direction of panel or funnel is changed for several times within the washing chamber to make the reciprocal movement through the change of rotating direction of roller. CONSTITUTION:When a panel 21 moves in the direction A for washing and transfer due to rotation of a roller 8 on the acid washing chamber 1 and the end of panel 21 moves up to the location of position detector 6, rotation of roller 8 is given reversely by the rotation drive mechanism and thereby the panel 21 changes the direction of movement to B. When the end of panel 21 moves up to the location of position detector 5, the roller 8 reversely rotate again and the panel 21 changes again the direction of movement to A. Such reciprocal movement is repeated up to the prescribed times and the panel 21 moves to the water washing chamber 3 and the similar reciprocal movement is carried out with the detection signals of position detectors 10, 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for cleaning the sealing surface of a flannel or funnel constituting a cathode ray tube envelope.

[Conventional technology]

FIG. 3 is a schematic cross-sectional view of a cathode ray tube. In the same figure,
12η is the panel, ri is the funnel μ, and kan is the neck, which are formed integrally with the funnel rock. (c) is a fritted glass spring /I/? υ and Fanne A/@ are sealed. (E) is a fluorescent surface, which is formed on the inner surface of /(N/I/@, and has an aluminum film. (E) is a shadow mask, and @ is a conductive film, which is formed on the inner surface of the funnel. There is.

(to) electrically connects the shadow mask (e) and the conductive film gradient with a conduction spring. The wire is an anode button, and the ... is an electron gun.

In order to operate the cathode ray tube shown in FIG. 3, it is necessary to apply a high voltage of about 30 KV across the anode button. Normally, the outer surface of a cathode ray tube is at ground potential, so a potential difference of 30 KV occurs between the inner and outer surfaces of the spring lv, fanne/L/@, and frit glass (c), and there is no electrical insulation between them. The quality of quality is a very important issue. If the sealing surface of a panel (Funne/L/@) is sealed with frit glass (c) while the sealing surface is dirty, the electrical insulation of this sealed part may be impaired, and sometimes during operation. Not only will insulation break down and cause safety issues, but high-voltage sparks may cause a fire in the television set. Therefore, spring /L/
Effective cleaning of these sealing surfaces before sealing (c) with the funnel is an important step for improving the electrical reliability of the sealed portion.

A conventional general seal surface cleaning device will be explained with reference to FIG. In the figure, 3υ is a spring, (21b) is a panel sealing surface, and (1) is an acid cleaning tank containing an acid cleaning liquid (2). (3) is a water washing tank which contains washing water (4). (7) is a drying tank. Also, (8).

(9) z (t2 is a cleaning/conveying roller, which is arranged in parallel inside the acid cleaning tank (1), water cleaning tank (3), and drying tank (7), and has a one-rotation drive mechanism (not shown). The above cleaning/conveying rollers (a), tC+)
is the acid cleaning solution (2) of the acid cleaning tank (1) and the water cleaning tank (3).
) is placed partially immersed in the cleaning water (4). Further, as the acid cleaning solution (2), a glass-eroding and dissolving liquid, such as hydrofluoric acid or acidic ammonium fluoride aqueous solution, is generally used.

To explain the operation of such a device, first, the spring μQv is a cleaning/conveying roller (8) driven by a rotational drive mechanism.
Due to the rotation of υ, it moves over the top of the acid cleaning tank 1), and at the same time, the acid cleaning liquid (2) adhering to the surface of the cleaning/conveying roller (8) adheres to the sealing surface (21b) of the spring A/ri υ. The sealing surface (21b) of the spring A11) is eroded and dissolved by the action of the acid cleaning liquid (2), and dirt is removed.

Next, the panel (goods) is moved to the water cleaning tank (3), and the cleaning water (4) is passed through the cleaning/conveying roller (9) to the sealing surface ( 21b)
come into contact with.

Acid cleaning solution (2) is for removing gold. Furthermore, panel Q
]) is moved to the drying tank (7), and the panel seal surface (21b
) is dried while being removed.

[Problem that the invention seeks to solve]

In the conventional cathode ray tube envelope seal surface cleaning device as described above, the more effective the cleaning is, the more a long cleaning tank with a large number of rollers is required.

In addition, in recent years, ultra-large pipes that have never been seen before have been manufactured.

As cleaning equipment becomes larger and larger, it becomes a big problem in terms of equipment cost and space.

This invention was made to solve these problems. Miniaturize the cleaning equipment without reducing the cost and reduce the cost of the equipment.

The purpose is to obtain a seal surface cleaning device that can save space.

[Means for solving problems]

The seal surface cleaning device according to the present invention is arranged in a cleaning tank in parallel, and the rotation direction of a plurality of cleaning conveyance rollers is arbitrarily determined and sequentially switched to specific pressure reverse rotation.

[Effect]

In this invention, the funnel of the panel reciprocates multiple times within one cleaning tank, making it possible to make the length of each cleaning tank much shorter than in the past. An embodiment will be described with reference to the drawings.

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a front view thereof. In the figure, (5)?
i6).

(10, α sword is a position detector that detects the position tN f of each moving panel Q or Fanne/l', respectively).

First, it is assumed that the spring/Lfl) is being moved in the direction A by the rotation of the roller (8) on the acidic cleaning tank (1) for cleaning and conveyance. When the end of spring AI (c) moves to the position of the position detector (6), a detection signal is issued by the detector (6), and this signal causes the rotation of the sloper (8) to continue as before. It is provided by a reverse rotational drive mechanism.

Then, the spring /L/Qυ changes its moving direction to the opposite direction, that is, to the direction B in FIG.

Next, when the end of the panel Qυ moves to the position e1 of the position detector (5), the first position detector outputs a detection signal again, and this signal causes the rotation of the roller (8) to continue as before. makes a reverse rotation sound, and eventually the spring /I/(2) changes its direction of movement to the A direction again.

This reciprocating operation is repeated a preset number of times, and then the panel is moved to the washing tank (3), where the detection signals from the position detectors α1 and 0υ are used.

A reciprocating operation similar to that in the acid cleaning tank (1) will be performed.

According to the device of the invention, the length of one cleaning tank is only slightly larger than the length of the spring (ve2υ) in the moving direction, and the same cleaning effect as the conventional one-directional movement can be obtained. It turns out.

In addition, as another embodiment, the switching in the direction of one rotation is not based on the signals of the position detectors (5) p (6) and al pαυ.

It is also possible to operate with a preset program timer signal.

〔Effect of the invention〕

As described above, according to the present invention, in order to change the rotational direction of the roller, the moving direction of the panel or funnel is changed multiple times within one cleaning tank and the mechanism is used to move the panel or funnel back and forth.
The cleaning equipment has been miniaturized without reducing cleaning effectiveness.
This has the effect of reducing equipment costs and space.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a sectional view for explaining a cathode ray tube, and FIG. FIG. 2 is a front view of a conventional sealing surface cleaning device for a cathode ray tube envelope. (1)...Acid cleaning tank, (3)...Water cleaning tank, (8
), (9)...Cleaning transport o ” la, (5) z
(6) pαQ, (6)...Roller switching means. Note that the same line numbers in each figure indicate the same or corresponding parts.

Claims (3)

[Claims] (1) In a cathode ray tube envelope seal surface cleaning device in which a plurality of rollers are arranged in parallel to support, clean, and convey the seal surface of the cathode ray tube envelope in a cleaning tank, the rotation direction of the rollers is A sealing surface cleaning device for a cathode ray tube envelope, characterized by comprising a roller switching means that sequentially switches between forward and reverse rotation. (2) The cathode ray tube envelope according to claim 1, further comprising a position detector provided in the cleaning tank, which detects the position of the panel or funnel and switches the rotational direction of the roller based on the signal thereof. Seal surface cleaning device. (3) A sealing surface cleaning device for a cathode ray tube envelope according to claim 1, further comprising means for switching the rotational direction of the roller in response to a signal from a preset program timer.