JPH0330235A - Holder for cathode-ray tube - Google Patents

Abstract

PURPOSE:To reduce the generation of a defect of a cathode-ray tube due to the displacement of a neck part by providing a bulb supporting body, a board seat on which the bulb supporting body is put, and a bulb moving mechanism by which the bulb is set to a reference point of the holder. CONSTITUTION:A bulb supporting body 19 is provided so as to support and hold a bulb 10 at a yoke part 12b of a funnel 11, and the bulb supporting body 19 is put on the upper surface of a board seat 20 that is separately provided, while each opposing surfaces 19a, 29a of the bulb supporting body 19 and the board 20 is tilted in a certain direction, and a roller 21 is placed between both of the opposing surfaces, so as to provide a bulb moving mechanism 22 by which the valve supporting body 19 is slid on the board 20 by the load of the valve 10. Even when a small vibration of the bulb 10 occurs when the holder 19 is run, the valve 10 is always set and maintained to a reference point with high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a holder for a cathode ray tube, and particularly to a holder for a cathode ray tube used in a heat treatment process for a bulb.

[Conventional technology]

The manufacturing process for color cathode ray tubes is as shown in Figure 2.
Generally, a step 1 of forming a black matrix type phosphor layer on the inner surface of a glass panel, and a step 2 of forming an organic material layer on the phosphor layer and then forming a metal bank layer,
A panel baking process 3 in which the organic material layer is thermally decomposed and removed as a decomposed gas, a frit baking process 4 in which the panel and funnel are welded using a frit glass composition, and a sealing process in which an electron gun is inserted and attached to the neck part. Stopping process 5
This is then carried out through steps such as exhaust step 6, which exhausts air, gas, etc. inside the pipe.

Here, among the above steps, a method called a single furnace method is proposed in which the series of steps from panel baking step 3 to exhaust step 6 is heat-treated in the same heating furnace for a valve that combines a panel and a funnel. has been done.

In this single-furnace method, the cathode ray tube envelope, or bulb, is placed on a holder and moved in a fixed direction through the heating furnace, followed by a series of heat treatment processes. is necessary.

FIG. 3 shows an example of a conventional cathode ray tube holder (JP-A-132-2142, JP-A-62-2143, JP-A-62-51637). This holder has a panel support 7 and a funnel support 8 on a holder body 9,
This is the panel 11 and funnel 1 that make up the valve 10.
At the same time, a neck support 13 and a yoke support 14 are provided on a support rack 15, and these are attached to the neck part 12a of the funnel l2 and the yoke g or its vicinity (
The valve 10 is brought into contact with each side of the yoke portion (hereinafter referred to as the yoke portion) 12b, and the valve 10 is set at the reference position of the holder by the interaction of these supporting means, and the valve 10 is mounted on a cart (not shown) or wheels or the like are run on the holder.

[Problem to be solved by the invention] According to the conventional Braun holder described above, the bulb 1
0 tends to move in the arrow direction shown in the figure, making it difficult to hold the valve 10 in the buried position of the holder with high precision.

If the valve 10 is not set correctly at the reference position of the holder, the panel 11 and the funnel 12 may not be fully aligned during the series of heat treatment steps, and the neck portion may be damaged. Due to the misalignment of the electron gun 12a, the arrival accuracy of the electron gun that is inserted into the neck portion 12a decreases,
Alternatively, the problem may become unsealable, and furthermore, the connection between the exhaust pipe and the exhaust head may become incomplete or impossible, causing undesirable problems such as failure of exhaust from the cathode ray tube (1).

Such misalignment of the valve is likely to occur if the holder swings while traveling or receives impact for some reason during the series of heat treatment steps.

Therefore, when the position of the neck portion 12a is misaligned, the position of the gun (σ) to be inserted into the neck IIS 12a and the position of the exhaust head to be connected to the exhaust head can be changed from the position of the neck IIS 12a to the position of the exhaust head to be connected to the neck IIS 12a. It is necessary to manually adjust it each time according to the position of 12a. However, such manual matching not only reduces production efficiency but also hinders automation of the production line.

In view of the above-mentioned conventional problems, an object of the present invention is to be able to always set the valve at the reference position of the holder with high precision, and to eliminate the need for alignment means for the various ridges due to misalignment of the neck portion in the series of heat treatment steps. The purpose of the present invention is to provide a holder for a cathode ray tube.

[Means to solve the problem]

The above object is to provide a cathode ray tube holder which has a reference position W setting means for setting the bulb at the reference position of the holder by bringing supports into contact with each side of the panel, the funnel, and the neck part, respectively. A valve support is provided to support and hold the valve support at or near the valve support, and a pedestal on which the valve support is placed, and each opposing surface of the support and the pedestal is inclined in a certain direction, so that the load of the valve causes the support to By moving it onto the pedestal above,
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This is achieved by providing a single-motion mechanism.

[Effect]

By the above means, the valve is moved while being supported and held by the valve support, and each side of the panel, funnel, and neck part is automatically brought into contact with each support, and the valve is stopped at the reference position of the holder. make it possible.

Therefore, even if the valve is slightly shaken while the holder is running, the valve can always be set and maintained at the reference position with high precision.

〔Example〕

Hereinafter, one embodiment according to the present invention will be explained from a first country.

The same parts as the third prisoner are given the same reference numerals.

The cathode ray tube holder shown in No. 1 is the Baru Support 1.
6, Funnel support l7 and neck support l8
The holder is provided with a reference position setting means for setting the pulp 10 at the reference position of the holder by bringing these supports into contact with each side of the spring 11, the funnel 12, and the neck portion 12a. In this example,
A valve support l9 is provided which supports and holds the valve 10 by the yoke ml2b of the funnel 11. The surfaces 19a and 20a are tilted in a certain direction, and a roller 2l is interposed between the two opposite sides, so that the upper valve support 19 is moved by the load of the valve lO.
A valve moving mechanism 22 is provided for sliding the valve onto a pedestal 20.

When the valve 10 is supported and held by the valve support 19 in this way, the valve 10 moves in the direction of the arrow in FIG.
Each side of the valve 10 automatically comes into contact with each of these supports 16, 17, 18 and comes to rest, and the valve 10 is set at the reference position of the holder.

A plurality of holding members 19b are provided on the upper surface of the valve support body 19 at equal intervals around the hole 19c, and by bringing the yoke s12b into contact with the holding members 19b, the valve 10 can be held constant. Preferably, it is constructed so that it can be vertically supported and held on the valve support body 19.

Therefore, the valve IO can be moved by the moving mechanism 22 in a state where it is constantly supported and held with high precision and brought into contact with each of the supports 16, 17, and 18, and the valve 10 can be moved to the reference position of the holder. can be set with high precision.

In addition, even if the valve 10 swings or receives a shock while the holder is running and deviates from the reference position, the high tension of the moving mechanism 22 will immediately move the valve 10 to the holder. can be returned to the reference position.

In addition, in the valve moving mechanism 22, the pulp support l9
The opposing surfaces of the pedestal 20 should be at an oblique angle of about 3 to 5 degrees with respect to the horizontal plane.If the oblique angle is large, the valve support 19 can be moved to the pedestal 20 without intervening the roller 21 on the opposing surface. It is also possible to slide it over the .

Further, the roller support body [9] may be made to run.

〔Effect of the invention〕

According to the present invention described above, since the bulb can always be held at the reference position of the holder with high precision, the occurrence of defects in the cathode ray tube due to misalignment of the neck portion is reduced in the series of heat treatment steps.

In addition, there is no need to align the electron gun to be sealed or the exhaust head to be connected to the neck each time depending on the position of the neck, which improves production efficiency and facilitates automation of the production line. It has the effect of

Furthermore, in the frit baking process, the bonding surfaces of the panel and funnel are aligned with high precision, which has the effect of improving the reliability of frit welding between them.

[Brief explanation of drawings]

FIG. 1 shows an explanatory view of the main parts of a cathode ray tube holder according to an embodiment of the present invention, (A) is a top view, and (B) is (A
), the second figure is a block country for explaining the manufacturing process of a cathode ray tube, the third figure is an explanatory view of the main parts which is an example of a conventional cathode ray tube holder, and (A) is a top view, (B> is a rolling cross-sectional view of (A). 7... Panel support, 8 funnel support, 10... Valve, 11... Panel, 12...
Funnel, 12a... Neck part, 12b.
...York, 13...Neck support, l4.
...Yoke support, 16...Panel support,
17...Funnel support, 18...Neck support, 19 River valve support, 19b...
・Supporting member, 20...Pedestal, 21...Roller
22... Valve movement structure. Figure 1 (A) j8 20 Figure 2 Figure 3 (A) CB)

Claims (1)

[Claims] 1. A cathode ray tube holder comprising reference position setting means for bringing a support into contact with each side of the panel, funnel, and neck portion to set the bulb at a reference position of the holder, as described above. A valve support that supports and holds the valve at or near the yoke of the funnel, and a pedestal on which the valve support is placed are provided, and each opposing surface of the valve support and the pedestal is inclined in a certain direction, so that the valve A holder for a cathode ray tube, comprising a valve moving mechanism that sets the bulb at a reference position of the holder by moving the bulb support onto the pedestal using a load. 2. The cathode ray tube holder according to claim 1, wherein a moving member such as a roller or a wheel is interposed between each opposing surface of the valve support and the pedestal.