JPH0221537A - Positioning device of cathode-ray tube - Google Patents

Abstract

PURPOSE:To make it possible to maintain the relative position of a getter unit and a high-frequency heating unit of a cathode-ray tube adequately by providing a rotation correcting device to correct the rotating position, an up and down correcting device to correct the up and down direction, and an inclination correcting device to correct the inclination, to the cathode-ray tube. CONSTITUTION:A rack 6 to load a cathode-ray tube 2, and rotation correcting devices 7 and 10 to correct the rotating positions of the cathode-ray tube respectively are provided. Furthermore, an up and down correcting device 14 to move the rack 6 loading the cathode-ray tube 2 up and down by a power cylinder 13, and an inclination correcting device 17 to correct the cathode-ray tube in a vertical position by contacting a member 15 to the upper side of a panel of the cathode-ray tube and pressing the member 15 with a power cylinder 16, are provided. As a result, not only the rotating position is corrected, but also the cathode-ray tube 2 can be moved and corrected up and down, or from an inclined condition to the vertical direction. The cathode. ray tube 2 can be positioned at an adequate position consequently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a positioning device for a cathode ray tube, and more particularly to a positioning device for a cathode ray tube in a getter 7 latching stage.

[Conventional technology]

Cathode ray tubes generally maintain a high vacuum inside the tube.
A getter device is provided to absorb the residual gas inside the tube. After the inside of the tube is evacuated using a normal vacuum pump, the getter device is heated with high frequency from the outside to flash (scattering) the getter substance, thereby removing the residual gas inside the tube. The getter material is flashed by 1 nitrogen and adsorbs the gas generated during operation from the metal thin film formed by adhering to the inside of the tube.

FIG. 2 is a diagram for explaining the getter flash of a cathode ray tube, in which 1 is a getter device arranged close to the tube wall of the cathode ray tube 2; The structure is such that the getter flash is performed by high frequency heating from a high frequency heating coil 3 provided close to.

By the way, the high-frequency heating coil 3 is supplied with a constant high-frequency current from the high-frequency transmitting device 4η for a certain period of time by the timer 5, and the getter device 1 performs the high-frequency heating for this certain period of time. If the relative position between the getter and the high-frequency heating coil 3 changes, the start time of the getter flash will change, and as a result, the amount of getter flashed in the above-mentioned fixed time will change, making it impossible to obtain a sufficient getter 7 lash. There is a fear.

Therefore, the relative position between the getter device 1 of the cathode ray tube 2 and the high frequency heating device 3 facing it is required to be always maintained at a constant level.

Normally, the above-mentioned high-frequency heating coil 3 is fixed and arranged at a fixed position, so in order to dispose the getter device 1 opposite to it at a fixed position, the cathode ray tube 2 is precisely positioned at a predetermined position. The need for positioning is a pain.

3 and 4 show a conventional positioning device for a cathode ray tube in a getter flage unit, where 6 is a stand on which the cathode ray tube 2 is placed, 7 is a power cylinder 81 and a roller 9 is shown. Reference numeral 10 denotes a rotation correction device which presses rollers 12 from power cylinders 111 against the outer periphery of the panel of the cathode ray tube 2 in the direction of the arrow, thereby correcting the rotational position of the cathode ray tube. For example, as shown in FIG. By correcting the cathode ray tube 2 four times to the positions η) to (B) shown in the figure, it is positioned at a proper position.

[Problem to be solved by the invention]

However, there is a possibility that an appropriate relative position between the getter device 1 and the Takayana wave heating coil 3 cannot be obtained only by correction by rotating the cathode ray tube. The cathode ray tube 21 has a slight external dimension tolerance, and if the cathode ray tube mounted on the 6t pedestal is tilted at an angle of only 77), the above-mentioned rotational correction will not be able to correct it. It is. For this reason, the start time of the getter's 7 lashes fluctuates, and there is a possibility that a sufficient number of getter 7 lashes may not be obtained.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a positioning device for a cathode ray tube that properly maintains the relative position of a getter device and a high frequency heating device of the cathode ray tube.

[Means to solve the problem]

The above object is to provide a cathode ray tube with a rotation correction device for correcting its rotational position, a vertical correction device for correcting its vertical direction, and an inclination correction device for correcting its inclination. This is achieved by providing a positioning device for a cathode ray tube that properly maintains the relative position of the getter device of the tube and the heating device that heats it.

[Effect]

By using the above means, the position of the cathode ray tube can be corrected in any of the rotational direction, vertical direction, and inclination.
It becomes possible to appropriately position the cathode ray tube.

〔Example〕

An embodiment according to the present invention will be described below with reference to FIG.

The same members as in FIG. 3 are given the same reference numerals and their explanations will be omitted.

In FIG. 1, reference numeral 6 denotes a pedestal on which the cathode ray tube 2 is mounted, and 7 and 10 respectively denote rotation correction devices for correcting the rotational position of the cathode ray tube 2. Up to this point, they are the same as the conventional ones, but in the present invention, the cathode ray a vertical correction device 14 that can move the pedestal 6 on which the tube 2 is placed in the vertical direction by a power cylinder 13;
A feature is that a tilt correction device (t17) is provided for vertically correcting the cathode ray tube by bringing a member 15 into contact with the upper surface of the panel of the cathode ray tube 2 and pressing the member 15 with a power cylinder 16.

With this configuration, the conventional method of correcting the rotational position is to move the cathode ray tube 2 vertically by one angle,
Alternatively, it is possible to move and correct the cathode ray tube 2 in the vertical direction from the tilted state to position the cathode ray tube 2 at an appropriate position.

〔Effect of the invention〕

With the device of the present invention described above, the relative position between the getter device of the cathode ray tube and the high-frequency heating device that heats it can be properly maintained, so fluctuations at the start of the getter flash are reduced, and the flash is insufficient. This has the effect of reducing the risk of performance deterioration of the cathode ray tube due to residual gas inside the tube.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an embodiment of a cathode ray tube positioning device according to the present invention, FIG. 2 is an explanatory diagram of a getter flash, and FIG. 3 is a sectional view of a main part of a conventional cathode ray tube positioning device. FIG. 4 (5) CB) is an explanatory diagram of an operation corrected by a conventional cathode ray tube positioning device. 7.10... Rotation correction device, 14... Vertical correction device, 17... Inclination correction device. Figure Figure

Claims (1)

[Claims] 1. The cathode ray tube has a rotation correction device for correcting its rotational position, a vertical correction device for correcting its vertical direction, and an inclination correction device for correcting its inclination. and a high-frequency heating device for heating the cathode ray tube.