JPH05198260A - Pin carbon coating device and method - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pin carbon coating device which improves the coating quality of conductive carbon on a panel pin, extends the durable life of a paintbrush, and enables multi-tube mixed flow production. [Configuration] The panel P is positioned on the fixed base 8. The panel P is provided with a metal back layer and pins. Below the panel P, a 5-axis vertical articulated robot 2 is provided. A paintbrush 5 is attached to the hand portion 11 of the robot 2. The tip 5a of the paintbrush 5 can be rotated by the robot 2. Conductive carbon is supplied from the carbon tank 4 to the tips 5a of the paintbrush 5. The tips 5a are squeezed by the rotation of the drum 16 to adjust the amount of conductive carbon and adjust the shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin carbon coating apparatus and method for coating conductive carbon for electrical connection between a panel pin and a metal back layer.

[0002]

2. Description of the Related Art Generally, in a color cathode ray tube, 20 to 30 applied to an anode terminal provided on a funnel.
It is necessary to apply a high voltage of KV to the metal back layer on the phosphor screen. This high voltage is applied in the order of the anode terminal, the funnel inner conductive film, the contact piece derived from the color selection electrode, the color selection electrode, and the panel pin (metal pin).
Conductive carbon is applied between the panel pin and the metal back layer on the phosphor screen to apply a high voltage to the metal back layer. And, the application of this conductive carbon was conventionally done by hand using a paintbrush,
2. Description of the Related Art In recent years, a device for automatically coating a paintbrush with conductive carbon has been devised in response to a demand for uniform coating and cost reduction.

[0003]

However, in the case of such a conventional example, since the conductive carbon is directly supplied to the paintbrush, it is difficult to uniformly contain the conductive carbon in the tips, and therefore, There is a problem that the conductive carbon may drip or fade during application.
Further, in the conventional example, since only a fixed part of the tip of the paintbrush can be used, there is a problem in that the tip of the brush is likely to be haired, and the tip of the brush is rapidly deteriorated. Further, in the conventional example, since the coating range is limited, it is not possible to completely guarantee continuity with the pins depending on the fluorescent screen coating and metal back work contents, and as a result, only one tube type can be produced in one line. It was

The present invention has been made in view of the above-mentioned problems of the conventional example, and an object of the present invention is to improve the coating quality of the conductive carbon on the panel pins and extend the durable life of the paintbrush. It is an object of the present invention to provide a pin carbon coating device and a method thereof that enable mixed production of tube types.

[0005]

As shown in FIG. 1 or 4, for example, a pin carbon coating apparatus according to the present invention includes a pin portion 7 for supporting a color selection electrode of a cathode ray tube and a metal back layer 1.
In order to make an electrical connection with the brush 9, the conductive carbon C supplied from the carbon supply means 4 is applied to the pin portion 7 by the brush 5.
Robot 2 for moving the brush 5 according to a predetermined command and rotating the tip 5a about the central axis of the brush 5 in a pin carbon coating device for coating
And a tip correction means 6 for squeezing the tip 5a of the brush 5 to adjust the amount of the conductive carbon C contained in the tip 5a and to correct the shape of the tip 5a. On the other hand, in the method for applying pin carbon according to the present invention, as shown in FIG. 1 or 4, for example, the conductive carbon C is supplied from the carbon supply means 4 so that the tip 5a of the brush 5 contains the conductive carbon C. The tip 5a of the brush 5 is squeezed by the tip correcting means 6 to adjust the amount of the conductive carbon C contained in the tip 5a and the shape of the tip 5a is corrected. The tip 5a around the shaft
This is done on different sides of this tip 5a by rotating the
The tip 5a is rotated to apply the conductive carbon C to the pin portion 7 for supporting the color selection electrode of the cathode ray tube by using the predetermined side surface of the tip 5a.

[0006]

In the present invention having such a structure, after the conductive carbon C is supplied to the tips 5a of the brush 5, the tips 5 are
Since the amount of the conductive carbon C contained in the tip 5a is adjusted by squeezing a, the amount of the conductive carbon C contained in the tip 5a is increased even when the conductive carbon C is supplied in a slightly larger amount. Become appropriate. The shape of the tip 5a is adjusted by this operation. Further, since the tip 5a is rotated when ironing the tip 5a and applying the conductive carbon C, the entire tip 5a of the brush 5 is used evenly. Further, since the brush 5 is moved by the robot 2 to apply the conductive carbon C, it becomes possible to apply the conductive carbon C to any position of the pin portion 7 for supporting the color selection electrode of the cathode ray tube. ..

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the overall configuration of the apparatus of this embodiment. As shown in the figure, the apparatus of this embodiment has a positioning mechanism 1 for fixing a panel P of a cathode ray tube, a small robot 2, and a carbon tank 4 having a supply nozzle 3.
And a tip correction unit 6 for correcting the tip of the paintbrush 5.

A panel P provided with a pin 7 for supporting a color selection electrode, which will be described later, and having a fluorescent screen formed thereon is placed on a fixed base 8 with the fluorescent screen facing down, and a positioning member 9 in the x and y directions. , 10 are used for positioning.

A robot 2 for applying the conductive carbon C is arranged in the fixed base 8. This robot 2
For example, a 5-axis vertical articulated robot (trade name: Movemaster EX / RV-M1 type, manufactured by Mitsubishi Electric Corporation)
Is used. A commercially available paintbrush 5 is attached to the tip of the hand portion 11 of the robot 2.

In this case, the paintbrush 5 is attached to the brush jig 12 as shown in FIG.
Is attached to the hand portion 11 of the robot 2 by a brush jig attachment fitting 13. The robot 2 is provided with a microcomputer (not shown), and the paintbrush 5 can be moved three-dimensionally according to a program given in advance. In particular, the paintbrush 5 can be rotated about its central axis.

When the paintbrush 5 is attached, the pattern portion of a commercially available paintbrush is cut out and fixed in advance to the brush jig 12 using the master gauge 14, and the brush jig 12 is
The robot 2 is attached to the brush jig attachment metal fitting 13 attached to the hand portion 11. By thus attaching the paintbrush 5 to the brush 12 in advance, even if the tip 5a of the paintbrush 5 is deteriorated, the conversion can be performed with one touch. Incidentally, 31 is a tip height adjusting bolt, 32 is a brush fixing jig bolt, 33
Are bolts for adjusting and fixing the inclination of the paintbrush 5.

The carbon tank 4 is filled with paste-like conductive carbon C and is supplied from the supply nozzle 3. And this carbon tank 4
It is fixed on the support base 34.

FIG. 3 is an enlarged view of the structure of the tip correction unit 6. As shown in FIG. 1, the tip correction unit 6 includes a container 1
5, a cylindrical drum 16 is arranged, and a container 15
The solvent 17 is injected into the inside. Here, the drum 16 can be rotated in the direction of the arrow by a driving unit (not shown). A wiper 18 for removing the conductive carbon C on the surface of the drum 16 is provided. As the solvent 17, a hydrocarbon-based solvent used as a solvent for the conductive carbon C is used. Then, as shown in FIG.
Be in contact with. Also, as shown in FIG.
The positional relationship between the robot 2 and the tip correction unit 6 is set so that the tip 5a of the paintbrush 5 moved by the hand unit 11 of the robot 2 can come into contact with the upper portion of the drum 16.
Further, the tip of the supply nozzle 3 of the carbon tank 4 is also positioned above the drum 16.

Next, an embodiment of the pin carbon coating method according to the present invention will be described. First, as shown in FIG. 6, for example, three metal pins 7 for supporting the color selection electrodes are used.
(7A, 7B, 7C) is provided, and a panel P having an inner surface on which a phosphor screen composed of a phosphor layer and a metal back layer of Al is formed by a known method is placed on a fixed base 8, and the positioning members 9 and 10 are used to move x. , Y direction positioning.

Next, a few drops of the conductive carbon C are dropped from the supply nozzle 3 of the carbon tank 4 to the tips 5a of the paintbrush 5 to supply the conductive carbon C. Then, the tip 5a of the paintbrush 5 is pressed against the drum 16, and the drum 16 is
By rotating the brush 5 times in several degrees, the brush containing ink is squeezed to squeeze the tip 5a to make the amount of the conductive carbon C appropriate. By performing this operation, even if a large amount of the conductive carbon C is supplied to the tips 5a, the excess conductive carbon C remains on the drum 16, so that the conductive carbon C contained in the tips 5a is removed. The amount will be appropriate. In addition, the tips 5a of the paintbrush 5 are also arranged.

On the other hand, the conductive carbon C remaining on the drum 16 in this step is soaked in the solvent 17 as the drum 16 rotates and easily peeled off. Then, as the drum 16 is further rotated, the drum 16 is rotated by the wiper 18.
The conductive carbon C on the surface is peeled off. Therefore, the surface of the drum 16 that performs the above-mentioned ironing operation is always kept clean.

FIG. 4 and FIG. 5 show a place and a direction where the conductive carbon C is applied. As shown in the figure,
For example, the conductive carbon C is applied by the paintbrush 3 so that the metal back layer 19 made of Al and the side surface of the pin 7 are connected. In this case, the coating is performed toward the edge of the skirt portion 20 of the panel P (direction A → B). This is to prevent the conductive carbon C from dripping. Further, in order to cope with variations in the position of the pin 7, etc., there are two conductive carbons C for one pin 7.
Apply.

Next, the tip 5a of the paintbrush 5 in this embodiment.
One example of how to use is shown in FIGS. First, the surface of the tip 5a receives the supply of the conductive carbon C from the tip of the nozzle 3 and rotates the drum 16 as described above to squeeze the surface. Next, after the tip 5a is floated from the drum 16 and the hand portion 11 of the robot 2 is rotated 180 °, the tip 5a is brought into contact with the drum 16 again, and the surface of the tip 5a is squeezed by the same method. In this state, the tip 5
The pin 7B is applied using the surface of a. in this case,
Only one of the two areas to be applied is applied. Next, the hand portion 11 of the robot 2 is rotated 180 °, and one surface of the pin 7C is similarly applied using the surface of the tip 5a. Further, the surface of the tip 5a receives the supply of the conductive carbon C and rotates the drum 16 to squeeze the surface. Then, the hand 11 of the robot 2 is rotated by 180 ° and the surface is squeezed. Then, the remaining portion of the pin 7B is applied using the surface of the tip 5a. Then, the hand portion 11 of the robot 2 is rotated 180 ° and the remaining portion of the pin 7C is applied using the surface of the tip 5a.

When the pin carbon is applied to only one position on the pin 7, the surface of the tip 5a is applied to the pin 7B, and the surface of the tip is applied to the pin 7C. End the cycle. Next, for other panels,
The surface of the tip 5a is used to apply the pin 7B, and the surface of is used to apply the pin 7C.

As described above, in the present embodiment, since the conductive carbon C is supplied to the tips 5a of the paintbrush 5 and the drum 16 is squeezed, the tips 5a contain an appropriate amount of the conductive carbon C. As a result,
The coating quality can be improved by preventing the conductive carbon C from sagging or fading. Further, by rotating the tips 5a when applying the conductive carbon C, it becomes possible to extend the durable life of the paintbrush 5 to a large extent. Further, by moving the paintbrush 5 by the robot 2 and applying the conductive carbon C, it is possible to apply the paint on any position of all the pins 7 of the positioned panel P, and thus it is possible to perform multi-pipe mixed flow production. There is also the effect of becoming.

In the above-mentioned embodiment, the conductive carbon is supplied by directly dropping the conductive carbon to the tip of the paintbrush, but the present invention is not limited to this, and the conductive carbon is once provided on the drum. You may make it soak into the tip after putting conductive carbon on it. However,
It is necessary to stop the rotation of the drum when squeezing the conductive carbon.

[0022]

As described above, in the present invention, after the conductive carbon is supplied to the tip of the brush, the tip of the brush is squeezed to adjust the amount of the conductive carbon contained in the tip. Therefore, the coating quality can be improved by preventing the conductive carbon from sagging or fading. In addition, since the tip is rotated when ironing the tip and applying the conductive carbon, the durability of the brush (prevention of curling, hair loss, and breakage) can be greatly improved. Further, since the brush is moved by the robot to apply the conductive carbon, it is possible to perform multi-pipe mixed flow production.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a pin carbon coating device according to the present invention.

FIG. 2 is a sectional view showing a mounting portion of a paintbrush of the apparatus of the embodiment.

FIG. 3 is an enlarged front view of a tip correction unit of the apparatus of the embodiment.

4A and 4B are a plan view and a cross-sectional view showing a place and a direction of applying conductive carbon.

5A and 5B are a front view and a side view showing an example of how to use the tips of a paintbrush.

FIG. 6 is a rear view of the panel of the cathode ray tube.

[Explanation of symbols]

 2 Robot 3 Nozzle 4 Carbon tank 5 Paintbrush 5a Ear tip 6 Tip correction part 7 Pin 11 Hand part 16 Drum C Conductive carbon P panel

Claims (2)

[Claims] 1. A pin for applying conductive carbon supplied from a carbon supply means to the pin portion with a brush to electrically connect the pin portion for supporting the color selection electrode of the cathode ray tube and the metal back layer. In the carbon coating device, a robot that moves the brush according to a predetermined command and rotates the tip of the brush around the center axis of the brush, and a conductive material included in the tip by squeezing the tip of the brush. A pin carbon coating device comprising a tip correction means for adjusting the amount of carbon and correcting the shape of the tip. 2. The conductive carbon is supplied from the carbon supply means to make the tip of the brush contain the conductive carbon, and the tip of the brush is squeezed by the tip correcting means to adjust the amount of the conductive carbon contained in the tip. Adjust and correct the shape of the tip,
This operation is performed on different sides of the tip by rotating the tip of the brush around the center axis of the brush using a robot, and then the tip of the brush is rotated using the robot to move the side surface of the predetermined tip. A method of applying pin carbon, characterized in that conductive carbon is applied to the pin portion of the cathode ray tube for supporting the color selection electrode.