JPH0675367B2 - Surface treatment method and device for panel face for cathode ray tube - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a surface treatment method of a panel face for a cathode ray tube and an apparatus thereof for forming a film having a uniform film thickness such as a transparent conductive film on the panel face of the cathode ray tube.

[Conventional technology]

In general, the spin coating method spins a relatively lightweight flat plate with a spinner device at a high speed of about 1000 rpm or more, drops the surface treatment liquid on the spin center of the flat plate, and spins the dropped treatment liquid evenly over the entire surface of the flat plate. It is a method of depositing with a thickness.

However, the cathode ray tube is several kg to several tens of kg in the past,
It cannot rotate at high speed. Furthermore, its shape is spherical,
Since it has an aspherical surface or a cylindrical shape, even if the treatment liquid is dropped at the spin center position of the panel face of the cathode ray tube, the treatment liquid does not spread uniformly over the entire panel face surface of the cathode ray tube.

Therefore, when depositing a transparent conductive film on the panel face of the cathode ray tube, the cathode ray tube is rotated at a low speed by a spinner device so that an operator moves the nozzle outward from the spin center position of the panel face of the cathode ray tube and also performs surface treatment from the nozzle. The liquid is jetted to deposit the transparent conductive film on the panel face. In this case, in order to apply the surface treatment liquid evenly to the panel face, while the operator visually checks the applied state of the transparent conductive film on the surface of the panel face, the nozzle is applied so that the transparent conductive film is evenly applied. Is moved outward from the spin center position of the panel face. At this time, the adjustment of the moving speed of the nozzle is performed depending on the feeling of the operator.

[Problems to be Solved by the Invention]

However, if the worker manually applies the transparent conductive film to the panel face of the cathode ray tube, the movement speed of the nozzle varies, and the thickness of the film becomes uneven.
There is a problem that workability is low and mass production cannot be achieved.

The present invention has been made in view of the above circumstances, and provides a surface treatment method and apparatus for a panel face for a cathode ray tube, which can be mass-produced and can improve the quality by keeping the thickness of the coating uniform. The purpose is to do.

[Means for solving the problem]

In order to achieve the above object, the present invention rotates a panel face of a cathode ray tube upward, and moves a nozzle provided above the panel face to inject outwardly from a rotation center position of the panel face to inject outwardly. At this time, the moving speed of the nozzle is controlled so as to change according to the peripheral speed of each part of the panel face, and the surface treatment liquid is applied to the panel face.

[Action]

According to the present invention, first, the cathode ray tube with the surface facing upward is rotated, then the nozzle is arranged at the rotation center position of the panel face of the cathode ray tube, and the surface treatment liquid is ejected from the nozzle,
Next, the nozzle is moved outward from the panel face rotation center position while controlling such that the nozzle is gradually decelerated in accordance with the increase in the peripheral speed of each part of the cathode ray tube panel face. Therefore, the surface treatment liquid from the nozzle can be applied substantially uniformly to the panel face of the cathode ray tube.

〔Example〕

Hereinafter, preferred embodiments of a surface treatment method of a panel face for a cathode ray tube and an apparatus thereof according to the present invention will be described in detail with reference to the accompanying drawings.

The spin coater 10 shown in FIG. 1 comprises a cathode ray tube rotating device 14, a nozzle traveling means 16, and a coating device in a booth body 12.
18 is a main component. The booth body 12 is formed in a substantially rectangular tube shape as a whole, and a door 20 is pivotally supported on the upper side surface of the booth body 12 via a shaft 19. The operating rod of a cylinder 22, one end of which is attached to the top of the booth body 12, is connected to the door 20, and when the cylinder 22 operates, the door 20
Rotates about axis 19 in the direction of arrow AB, and booth body 12
The opening 26 is opened and closed. The cathode ray tube 27 is put into and taken out of the booth body 12 through the opening 26 as described later.

In addition, an air introduction hole 28 is formed in the lower part of the booth body 12, and an air discharge hole 30 is formed in the top of the air introduction hole 28.
A filter 31 is attached to 28. Thereby, the air in the booth body 12 can be kept clean.

The cathode ray tube circuit device 14 is provided in the vertical direction at a substantially central portion in the booth body 12. The CRT rotating device 14 has a tubular body 32, and the tubular body 32 is fixed to the bottom of the booth body 12 via support members 34, 34, 34. A rotating shaft 36 is coaxially supported in the cylindrical body 32 via a bearing. A circular panel table 38 is fixed to the upper end of the rotary shaft 36, and clamp levers 40, 40, 40, 40 are mounted on the panel table 38 in four directions via shafts 41 as shown in FIGS. 1 and 2. It is provided so that it can swing freely. A rubber 42 is attached to a holding portion at an upper end portion of the clamp lever 40, and an operating rod of an air cylinder 44 shown in FIG. 1 is connected to a lower end portion thereof. The end of the air cylinder 44 is pivotally supported by the leg of the panel table 38.

The air cylinder 44 is connected to an air supply source (not shown) via the hose 44A, the air passage 36A of the rotary shaft 36, the hose 45, and the like. Further, as shown in FIG. 1, a spring 46 is provided at the lower end of the clamp lever 40 and the leg of the panel table 38, so that the clamp lever 40 faces outward, that is, the cathode ray tube.
Biased away from 27. Therefore, the cylinder
When air is supplied to 44, the clamp levers 40, 40, 40, 40
The upper end of is rotated inside the table 38 against the urging force of the spring 46, and the rubbers 42, 42, 42, 42 hold the four sides of the cathode ray tube 27 and open the cylinders 44, 44, 44, 44. Clamp levers 40, 40, 4 by the urging force of springs 46, 46, 46, 46
The 0 and 40 rotate outward in the opposite direction, and the holding of the cathode ray tube 27 is released.

A pulley 48 is fixed to the lower end of the rotary shaft 36 shown in FIG. 1, and a belt 54 is stretched around the pulley 48 and the output side pulley 50 of the motor 52 in FIG. Therefore, the motor 52
When is driven, the panel table 38 rotates.

Further, as shown in FIG. 1, the pulley 48 is provided with a positioning plate 54, and the support member 34 is provided with a stop positioning sensor 56 of the panel table 38 for detecting the positioning plate 54. The positioning sensor 56 is a detection end for stopping the panel table 38 at a predetermined stop position, as shown in the block diagram of FIG. Therefore, since the panel table 38 is positioned at a predetermined position, the manipulator 10 to be described later is
At 0, the cathode ray tube 27 can be easily arranged on the panel table 38.

The nozzle traveling means 16 shown in FIG. 1 has a shaft 60 rotatably provided on the left side surface of the booth body 12, and a lever 62 is fixed to the lower end of the shaft 60. As shown in FIG. 3, the nut 63 integrated with the lever 62 is screwed into a ball screw 64, and the ball screw 64 is coaxially fixed to the output shaft of the motor 66. This motor 66 is mounted on a swing plate 68,
The swing plate 68 is rotatably supported on the bottom of the booth body 12 via a pin 70.

Further, as shown in FIG. 1, an origin sensor 71 is provided above the swing plate 68. The origin sensor 71 is a detection end for stopping a nozzle 74, which will be described later, at the origin (center position of panel face rotation of the cathode ray tube 27) as shown in FIG.

The nozzle 74 of the coating device 18 shown in FIG. 1 is attached to the tip of an arm 72 fixed to the upper end of the shaft 60. Therefore, when the motor 66 of the nozzle operating means 16 is driven by the control means (NC control) of the servo controller 71A, the nozzle 74 moves through the shaft 60 in the direction of arrow CD in FIG.

A metering pump 78 shown in FIG. 4 is connected to the nozzle 74 via a tube 76. The metering pump 78 includes a motor 80 and a speed reducer 82, and a ball screw 84 is meshed with the speed reducer 82. The rod portion 88 of the cylinder 86 is connected to the left end portion of the ball screw 84, and the suction port 90 communicates with the cylinder 86.
A tank 94 is connected to the tank via a tube 92. A surface treatment liquid 95 is filled in the tank 94. Therefore,
When the motor 80 is driven and the ball 84 moves in the direction of arrow F, the processing liquid is supplied from the tank 94 into the cylinder 86, and when the ball screw 84 moves in the direction of arrow E, the processing liquid in the cylinder 86 passes through the tube 96. Is ejected from the nozzle 74.

This metering pump 78 is a control unit shown in FIG.
The injection amount is adjusted at 97. The metering pump 78 is provided at the bottom of the booth body 12 as shown in FIG.

In FIG. 5, 102 is a solenoid valve, 108 is a main controller, 10
9A and 109B are encoders. The main controller 108 is used for the rotation and positioning servo controller 52A of the panel table 38, the nozzle positioning servo controller 71A, the solenoid valve 102 and the like as a whole control and for inputting data for controlling these. Where solenoid valve
Reference numeral 102 controls the operation of the cylinder 44 that rotates the clamp lever 40 that clamps the cathode ray tube 27.

Next, the operation of the surface treating apparatus for the panel face for the cathode ray tube according to the present invention, which is configured as described above, will be described with reference to FIGS. 6 to 9.

First, the cylinder 20 of the booth body 12 shown in FIG. 1 is operated to rotate the door 18 in the direction of the arrow A to open the opening of the booth body 12.
Open 26. After opening the opening 26, as shown in FIG.
Manipulator 110 arranged near the booth body 12
Braun tube 2 mounted on the dolly 114 with the claws 110A and 110A of
The movable body 110B of the manipulator is held in the vertical direction and the horizontal direction by gripping 7, and the cathode ray tube 27 is put in the booth body 12 through the opening 26 and set on the panel table 38.
At this time, the panel table 38 is stopped at the position corresponding to the cathode ray tube 27 by the function of the stop positioning sensor 56 (7th position).
See figure (A) T1). After the surface treatment is completed, the manipulator 110 takes out the cathode ray tube 27 from the Bunnel table 38 and trolleys 11
Move to 4.

The cathode ray tube 27 is placed on a carriage 114 that moves on guide rails 112 and 112 provided between the booth body 12 and the manipulator 110, and is sequentially conveyed between the booth body 12 and the manipulator 110. .

After the cathode ray tube 27 is set on the panel table 38, air is supplied to the cylinders 44, 44, 44, 44 and the clamp lever 4
Clamp the cathode ray tube 27 at 0, 40, 40, 40.

Next, as shown in FIG. 7 (A), a CRT rotating device 14
The motor 52 is driven to rotate the cathode ray tube 27 via the panel table 38, and the motor 66 of the nozzle traveling means 16 is rotated to move the nozzle 74 as shown in FIG. 7B.
Stop at a predetermined standby position. The stopped nozzle 74 moves to the rotation center position of the panel face of the cathode ray tube 27 after T2 seconds.

After the movement is completed, as shown in Fig. 7 (A), the panel table
When 38 reaches the set number of rotations, the motor 80 of the coating device 18 shown in FIG. 7 (C) is driven to jet the surface treatment liquid from the nozzle 74 to the center of rotation of the panel face of the cathode ray tube 27.
Next, as shown in FIG. 7 (B), after T3 seconds from the start of injection, the motor 66 of the nozzle traveling means 16 is driven by the NC control of the control means, and the nozzle 74 turns outward from the center of rotation of the panel face. Since the rotation of the motor 66 is NC controlled in advance so as to be gradually decelerated, the arm turning speed is decelerated little by little (see a curve in FIG. 7).

Immediately before the nozzle 74 is decelerated and stopped, the injection of the surface treatment liquid is stopped after T4 seconds as shown in FIG. 7 (C), and then the surface treatment liquid is injected into the cylinder 86 of the coating device 18 (T5 seconds). Inhale. During inhalation of the surface treatment liquid, the rotation of the panel table 38 is stopped after T6 seconds as shown in FIG. 7 (A), and the rotational positioning of the panel table 38 is completed at the same time when the inhalation is completed (T1).

Hereinafter, the swirling speed of the nozzle will be described based on the graph of FIG. The vertical axis of FIG. 8 indicates the moving distance of the nozzle 74, and the horizontal axis indicates the moving time of the nozzle 74. Graph
120 shows a so-called sine curve, and the moving distance of the nozzle per hour is gradually decreasing. Setting the moving speed of the nozzle 74 as in this graph, the circumferential speed V ₁ of the panel face surface of the cathode ray tube 27, the relationship between the moving speed V ₁ of the nozzle ^{_{74, V 1 2 + V 2 2}} ≒ constant, and the nozzle CRT with surface treatment liquid jetted from 74
It can be evenly applied to 27 panel faces. FIG. 9 is a plan view showing the locus of the nozzle 74 based on the above relationship. That is, the trajectory 122 of the nozzle 74 is the cathode ray tube 27.
Nozzle away from the center of the panel face of
The space between the 74 tracks is narrowing. This is the nozzle
It shows that the moving speed of 74 becomes slower as it moves away from the center of rotation of the panel face.

In the above-mentioned examples, the surface treatment liquid is a halogenated silicon, a silica sol solution prepared by using silane alkoxide or silyl isocyanate or the like, Fe, Co, Ni, Cu, Ag, Zn,
A solution for an antistatic coating containing one or more compounds selected from Al, In halides, nitrates or sulfates was used. A solution for antiglare can be used as the treatment liquid, and a solution for both antiglare and antistatic may be used.

〔The invention's effect〕

As described above, according to the method and apparatus for treating the surface of the panel face for a cathode ray tube according to the present invention, the nozzle speed is controlled according to each part of the panel face of the cathode ray tube, and the treatment liquid jetted from the nozzle is substantially uniform. Since it can be applied to the entire surface of the panel face of the cathode ray tube, the quality can be improved compared to the case where the treatment liquid is manually applied to the panel face of the cathode ray tube depending on the feeling of the conventional operator. Further, mass production can be achieved.

[Brief description of drawings]

1 is a sectional view of a surface treatment device for a panel face for a cathode ray tube according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1,
FIG. 3 is a sectional view taken along the line III-III in FIG. 1, FIG. 4 is an enlarged view of a metering pump used in the surface treatment device for the panel face for a cathode ray tube according to the present invention, and FIG. 5 is a cathode ray tube according to the present invention. 6 is a schematic block diagram of a surface treatment apparatus for a panel face for a cathode ray tube, FIG. 6 is a perspective view showing a relationship between a surface treatment apparatus for a panel face for a cathode ray tube according to the present invention and a manipulator, and FIG. 7 is a panel for a cathode ray tube according to the present invention. 8 is a timing chart showing the operation state of the surface treatment of the face, FIG. 8 is a graph showing the movement state of the treatment liquid jetting nozzle of the surface treatment apparatus for the panel face of the cathode ray tube according to the present invention, and FIG. 9 is the present invention. FIG. 6 is a plan view showing a locus of application to the panel face of the CRT by the surface treatment device for the CRT panel face. 10 …… Panel face surface treatment equipment for cathode ray tubes, 12
...... Booth body, 14 …… CRT rotation device, 16 …… Nozzle running control means, 18 …… Coating device, 56, 71 …… Positioning sensor, 40 …… Lever, 44 …… Cylinder, 74 …… Nozzle.

Claims (2)

[Claims] 1. When a nozzle for rotating a cathode ray tube with its panel face facing upward and jetting a surface treatment liquid provided above the panel face is moved outward from the center of rotation of the panel face, the moving speed of the nozzle is A surface treatment method for a panel face for a cathode ray tube, which is characterized in that the surface treatment liquid is applied to the panel face while controlling so as to change according to the peripheral speed of each part of the panel face. 2. A Braun tube rotating device having means for holding the panel face of the Braun tube in an upward direction, and a coating device for spraying a surface treatment liquid from a nozzle provided above the panel face to apply a fixed amount on the panel face surface. Positioning means for stopping the nozzle at the panel face rotation center position, traveling means for moving the nozzle outward from the panel face rotation center position, and nozzle movement speed that changes according to the peripheral speed of each part of the panel face. A surface treatment device for a panel face for a cathode ray tube, comprising: