JP2003045328A - Carbon application method and equipment for same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carbon application equipment which enables stable and highly reliable application of carbon. SOLUTION: A brush 28 is arranged to be held by an application hand 29 freely rotatably and angle adjustably. A three-axis orthogonal coordinate robot 27 which is movable in the face direction and the depth direction of a panel 11 is operated. The tip of the brush 28 provided in the application hand 29 is moved to apply carbon according to an application trajectory with a plurality of predetermined trajectory points. Information such as the change in the shape or fixing status of the brush 28, a correction to the application trajectory due to deterioration in the point of the brush or the like are inputted as needed through an external-input operating panel 45, and are enabled to be modified as required for keeping a stable and highly quality carbon application state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbon coating method and apparatus for coating conductive carbon on a panel inner surface of a cathode ray tube with a brush.

[0002]

2. Description of the Related Art Generally, in a cathode ray tube, 20 kV to 30 applied to an anode terminal provided on a funnel.
It is necessary to apply a high voltage of kV to the aluminum layer which is the conductive layer of the phosphor screen formed on the inner surface of the panel. This high voltage is applied in the order of the anode terminal, the funnel inner conductive film, and the metal panel pin. Further, the panel pin is planted inward on the inner peripheral surface of the panel, and electrically conductive carbon is applied between the aluminum layer of the fluorescent surface formed on the inner surface of the panel and the aluminum layer of the fluorescent surface to electrically connect. High voltage is applied to the layer.

Conventionally, as the carbon coating, for example, the method described in Japanese Patent Laid-Open No. 5-198260 is known.

This Japanese Patent Laid-Open No. 5-198260 discloses that
A 5-axis vertical articulated robot is used, and the carbon supplied to the tip of the brush is applied by a brush held at the tip of the robot hand of the vertical articulated robot. In this case, the brush can be moved along a predetermined locus by a robot hand of a 5-axis vertical articulated robot to apply carbon.

As described above, since the 5-axis vertical articulated robot is used, the degree of freedom of the application range is large, and one unit can apply the conductive carbon to a plurality of panel pins. Further, since the tip of the brush can be rotated around the axis of the brush by the joint axis of the vertical articulated robot, the coating quality is improved.

By the way, in recent years, there has been a demand for downsizing and speeding up of the apparatus in the manufacturing process, and in the case of applying the conductive carbon, it is desired that the change of the application trace due to the shape of the brush can be changed by an external operation at any time. ing.

However, for example, the above-mentioned Japanese Unexamined Patent Publication No.
In the coating work using the 5-axis vertical articulated robot described in Japanese Patent Laid-Open No. 198260, when the carbon is applied to the panel pin 12 implanted in the inner periphery of the panel 11, as shown in FIG. Since the brush 13 is attached to the relatively large robot hand 15 of the robot 14, the space between the brush 13 and the inner surface of the panel 11 is small. Therefore, when changing the coating trajectory, the robot frame and the panel 11 may interfere with each other depending on the operation posture of the robot 14, and it is difficult to change them in real time in order to avoid such interference.

Further, in the prior art, since the brush 13 is rotated by the joint axis of the robot 14, it is generally scalar control and it is difficult to control the posture, and the robot 14
Due to the influence of the frame, as shown in FIG. 10, the application angle of the brush 13 is restricted to the upward posture with respect to the horizontal. Therefore, the conductive carbon 16 excessively supplied to the tip of the brush 13 may hang down and scatter on the effective surface of the aluminum layer 17 as a conductive layer formed on the inner surface of the panel 11.

Further, due to such restrictions, the aluminum layer formed on the inner surface of the panel 11 as shown in FIG.
The application locus 18 between the 17 and the panel pin 12 is a small straight line and must be applied at two locations in order to obtain a sufficient connection area. For this reason, it is necessary to perform the coating operation twice for each panel pin 12, and also for one robot.
Since a plurality of panel pins 12, for example, usually four panel pins 12 are coated by 14, a large amount of coating work time is required, and the speeding up of the work is limited.

[0010]

As described above, according to the prior art, it is not possible to change or correct the coating locus at any time, dripping of carbon occurs, and there is a limitation in speeding up the working time. There is a problem that it is difficult to efficiently obtain a carbon coated state.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a carbon coating method and a carbon coating method capable of stably coating with high quality.

[0012]

The present invention is a carbon coating method for coating conductive carbon on the inner surface of a panel of a cathode ray tube with a brush, wherein the coating locus of the brush is set to be changeable at any time by an external operation, The brush is capable of adjusting the direction of the brush tip, is movable in the plane direction and the depth direction of the panel, and moves according to a set application locus to apply the brush. Or, even if the tips are deteriorated, the coating trajectory can be changed or corrected at any time, and a stable and high-quality carbon coating state can be obtained.

[0013]

DETAILED DESCRIPTION OF THE INVENTION A carbon coating apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
It should be noted that the same reference numerals are given to the portions corresponding to the portions described in the conventional example.

As shown in FIGS. 1 and 2, reference numeral 21 is a frame-shaped device frame, and a base plate 22 is horizontally installed above the device frame 21. On the base plate 22, a cathode ray tube panel 11 such as a cathode ray tube is provided.
A receiving seat (23) for supporting and supporting the panel (11) is provided, and a positioning mechanism (24) for positioning and fixing the panel (11) is provided. Also, on this base plate 22,
A transfer device 25 for sucking and holding the panel 11 is provided, and the transfer device 25 transfers the panel 11 between the base plate 22 and another device (not shown).

Further, the base plate on the device frame 21
A plurality of, for example, two, three-axis Cartesian coordinate robots 27 as a coating mechanism are arranged between the two and 22. This triaxial Cartesian robot 27 has a coating hand 29 as a holding portion for the brush 28 shown in FIG. 3, and the coating hand 29 is in the plane direction of the panel 11 placed on the base plate 22, that is, X,
It is moved in the Y direction and the depth direction, that is, the Z direction.

Then, the application hand 29 is held so as to be adjustable around the axis of the application hand 29 so that the angle in the axial direction, which is the direction of the writing tip of the writing brush 28, can be adjusted. As shown in FIG. It has three of the 1st bracket 31, the 2nd bracket 32, and the 3rd bracket 33, and the 1st bevel gear 34, the 2nd bevel gear 35, and the 3rd bevel gear 36. The first bracket 31 is fixedly attached to the operating end of the triaxial Cartesian robot 27, and a rotary drive 37 such as a motor is attached to the left side surface of one side.

The second bracket 32 has a first side on one side.
Is attached to one side of the bracket 31 of the first bevel gear and is rotationally driven by the rotary drive 37.
Have 34. Further, the second bracket 32 is configured to be rotatable about the rotation axis of the first bevel gear 34 up to an arbitrary angle.

Further, one side of the third bracket 33 is attached to the other side of the second bracket 32 so that the third bracket 33 is attached by a bearing 38 common to the second bracket 32 and the third bracket 33. A second bevel gear 35 that meshes with the first bevel gear 34 is rotatably attached. Also, this third
The bracket 33 rotates around the bearing 38 at an arbitrary angle.

Further, the third bevel gear 36 is rotatably mounted with a third bevel gear 36 whose other side portion meshes with the second bevel gear 35. The rotating shaft of the third bevel gear 36 penetrates the third bracket 33 and is connected to the brush fixing shaft 39 on the opposite side of the third bracket 33. This brush fixed axis 39
One end of the brush 28 and the base end portion of the brush 28 have a tapered fitting structure, and the brush 28 can be replaced easily and immediately.

By rotating and fixing the second bracket 32 and the third bracket 33 at arbitrary angles, the brush 28 can be adjusted at arbitrary angles in three dimensions.
Further, by rotating the rotary drive 37, the tip 28a of the brush 28 can be rotated about the shaft center via the first bevel gear 34, the second bevel gear 35, and the third bevel gear 36.

Although the first bevel gear 34, the second bevel gear 35, and the third bevel gear 36 are used to cope with all angles, the angle of the brush 28 is the rotary drive 37. When used in a state perpendicular to the rotation axis of the
It suffices to use two of the 34 and the third bevel gear 36 for meshing.

As shown in FIGS. 1 and 2, a carbon agitation tank 41 is installed on the device frame 21, and the carbon agitation tank 41 is filled with conductive carbon 16. Further, a stirring mechanism is provided inside in order to eliminate separation of the blended components of the conductive carbon 16.

Further, a metering pump 42 is installed near the carbon stirring tank 41 on the apparatus frame 21, and the conductive carbon 16 in the carbon stirring tank 41 is supplied to the nozzle.
It is supplied to the tip 28a of the brush 28 by 43. Further, the supply nozzle 43 is set to have a small discharge diameter so as to provide a stable supply amount, and supplies a preset supply amount of carbon for each tube type to the tip 28a of the brush 28 by the metering pump 42.

Further, the external input operation panel 45, the control panel 46 and the robot control panel 47 constitute a control means 48.
For example, 48 sets the coating locus in advance in the three-axis Cartesian coordinate robot 27 based on the locus points A, B, C, D, E, etc., and the coating locus is, for example, an external input operation panel 45.
It can be changed at any time by an external operation based on the locus points A, B, C, D, E, etc.

In order to achieve such a function, the external input operation panel 45 is provided at a height on the device frame 21 where it can be easily operated, and the external input operation panel 45 is operated by an operation tool such as a touch panel provided on the board surface. Operation information such as the application trajectory can be arbitrarily input. Further, both the control board 46 and the robot control board 47 are provided in the device frame 21. Further, the control panel 46 calculates the application trajectory of the brush 28 based on the information input from the external input operation panel 45 by the built-in arithmetic device, and adjusts the angle so that the brush tip of the brush 28 does not face upward, Further, the brush tip of the brush 28 is restricted from being directed upward, and is output to the robot control panel 47. The robot control panel 47 operates in accordance with the data such as the coating trajectory input from the control panel 46.
The axis orthogonal Cartesian robot 27 is directly driven and controlled.

Next, the operation of the above embodiment will be described.

First, when applying carbon, a transfer device
25, the panel 11 is placed on the seat 23 on the base plate 22 with the inner surface facing downward. And panel 11
As shown in FIGS. 7 and 8, an aluminum layer 17 as a conductive layer is formed on the inner surface, and a plurality of, for example, four panel pins 12 for holding a shadow mask (not shown) are formed on the inner surface facing inward. Have been planted. Further, the planting position of the panel pin 12 may be each corner portion as shown in FIG. 7 or an intermediate portion of each side as shown in FIG. 8, but it is determined by the pipe type.

Next, the metering pump 42 is operated to supply the conductive carbon 16 in the carbon stirring tank 41 to the tip 28a of the brush 28 by the supply nozzle 43. This carbon supply is
It is preset for each tube type and is supplied to the tip 28a without excess or deficiency.

Then, the three-axis Cartesian coordinate robot 27 is operated to move the tip 28a of the brush 28 provided on the coating hand 29,
It is moved to the start position of the preset application locus. Here, the coating locus has a plurality of locus points A, B, C, D, E as shown in FIG. 5, for example. That is, from the locus point A near the panel effective surface on one side surface side of the panel pin 12 on the inner peripheral surface of the panel 11 to the locus points B and C contacting the outer peripheral surface of the panel pin 12, along the outer peripheral surface of the panel pin 12. It is a coating locus that reaches the locus point D on the other side surface and reaches the locus point E near the end of the panel 11.

Therefore, the tip 28a of the brush 28 is moved to the locus point A by the three-axis Cartesian coordinate robot 27, and the brush 28 is rotated by the rotary drive unit 37 to have locus points B, C, D and E. The conductive carbon 16 is applied by moving the application track.

Here, the coating hand 29 includes an L-shaped first bracket 31, a second bracket 32 and a third bracket.
Three of 33, the first bevel gear 34, the second bevel gear 35 and the third
Mainly composed of three bevel gears 36
As shown in FIG. 4, a sufficient space can be secured even in the panel 11.

Therefore, even if the coating locus is slightly changed, there is no possibility of causing interference with the inner surface of the panel 11, and the coating locus can be changed or corrected at any time. For example, the external input operation panel 45 can be used to input, for example, a change in the application trajectory associated with multi-tube mixed production, a change in the shape of the brush 28, a change in the attachment state, or a correction of the application trajectory for deterioration of the tips 28a. The change or correction of the application locus is input through the touch panel screen of the external input operation panel 45. That is, by inputting changes of a plurality of predetermined trajectory points A, B, C, D, E as movement distances on the robot coordinate axes, that is, the X-axis, Y-axis, and Z-axis, and confirming the result on the monitor, The desired coating trajectory is obtained. As a result, it is possible to always provide a stable and high-quality carbon coating state.

Further, since the spatial margin in the panel 11 is sufficiently large, a large coating locus as shown in FIG. 5 can be obtained. Therefore, the applied conductive carbon 16 has a sufficiently large connection area with the aluminum layer 17 and the panel pin 12, and it is not necessary to apply the conductive carbon 16 in two places as in the conventional example shown in FIG. Corner work time is reduced.

Further, two 3-axis Cartesian coordinate robots 27 are provided, and the coating operation is carried out in parallel with respect to a plurality of panel pins 12, for example, four panel pins 12 by these two 3-axis Cartesian coordinate robots 27. By doing so, the work time can be shortened as compared with the conventional work by one robot.

Further, in the coated state, as shown in FIG. 4, the coating hand 29 capable of changing the angle in three dimensions is used.
The tip 28a of the tip 28a can be held downward.
Further, the control board 46 and the robot control board 47 control the brush 28 by restricting the brush tip of the brush 28 from being directed upwards. Therefore, as in the conventional example shown in FIG. It is never applied. Therefore, no carbon drips from the tip 28a to the brush 28 side, and a high-quality coating state can be maintained.

Although the triaxial Cartesian coordinate robot 27 is shown as the coating mechanism in the above-mentioned embodiment, a mechanism having another structure may be used as long as it has the same function.

[0037]

According to the present invention, the application locus can be set and changed at any time by an external operation, and the application locus of the brush can be moved. Therefore, even if the shape or attachment state of the brush is changed or the tip of the brush is deteriorated, The application locus can be changed or corrected at any time, and a stable and high-quality carbon application state can be achieved.

[Brief description of drawings]

FIG. 1 is a front view showing a carbon coating device according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view showing a holding portion for holding the brush.

FIG. 4 is a cross-sectional view showing a coating state with a brush held by the same holding unit.

FIG. 5 is a front view showing the same carbon coating locus.

FIG. 6 is a side view of the same.

FIG. 7 is a perspective view showing the internal structure of the panel to be coated.

FIG. 8 is a perspective view showing the internal structure of another panel to which the same is applied.

FIG. 9 is a diagram showing a relationship between a conventional robot hand and a panel.

FIG. 10 is a diagram showing a relationship between a robot hand and a panel in a conventional example.

FIG. 11 is a front view illustrating a coating trajectory of a conventional example.

[Explanation of symbols]

11 panels 12 panel pins 16 conductive carbon 17 Aluminum layer as conductive layer 27 Three-axis Cartesian coordinate robot as coating mechanism 28 Brush 29 Application hand as holding part 48 Control means A to E locus points

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4D075 AC49 AC57 AC93 DA23 DB07                       DC19 EA02 EB01                 4F040 AA12 AB20 AC02 BA02 CA08                       DA14                 4F042 AA06 AB06 BA08 ED11 FA24                 5C028 AA03 AA10

Claims (11)

[Claims] 1. A carbon coating method for coating conductive carbon on the inner surface of a panel of a cathode ray tube with a brush, wherein the coating locus of the brush can be set and changed at any time by an external operation. A carbon coating method, which is adjustable and movable in a plane direction and a depth direction of the panel, and which moves and coats according to a set coating locus. 2. The carbon coating method according to claim 1, wherein the coating locus is set at a locus point on the coating locus. 3. The brush is applied by adjusting the angle so that the tip of the brush does not face upward.
The carbon coating method described. 4. The carbon coating method according to claim 1, wherein the brush is controlled so that the tip of the brush is directed upward. 5. The brush is one in which conductive carbon is applied between a conductive layer formed on the inner surface of the panel and a pin implanted on the inner peripheral surface of the panel. On one side, move it from a position near the panel effective surface to a position in contact with the pin outer peripheral surface, move it to the other side along the outer peripheral surface of this pin, and then move it to a position near the panel end and apply it. The carbon coating method according to any one of claims 1 to 4, wherein: 6. A carbon coating device for coating conductive carbon on a panel inner surface of a cathode ray tube with a brush, comprising: a holding part for holding the brush so that the direction of a writing tip can be adjusted. A coating mechanism that is movable in the plane direction and the depth direction of the panel, and the coating trace of the brush is preset in this coating mechanism, and the setting of this coating trace can be changed at any time by an external operation. And a control means for moving and applying the brush according to the above. 7. The carbon coating apparatus according to claim 6, wherein the coating mechanism has a triaxial Cartesian coordinate robot. 8. The carbon coating apparatus according to claim 6, wherein the control means sets the coating locus at a locus point on the coating locus. 9. The holding portion is configured to be capable of three-dimensionally adjusting the axial direction of the brush so that the brush tip of the brush in the applied state does not face upward. Carbon coating equipment. 10. The carbon coating device according to claim 6, wherein the control means regulates that the writing brush tip of the brush in the coating state is directed upward. 11. The control means, when applying the conductive carbon between the conductive layer formed on the inner surface of the panel and the pins planted on the inner peripheral surface of the panel, shows the application locus as the inner peripheral surface of the panel. On one side of the pin from the position close to the panel effective surface to the position in contact with the outer peripheral surface of the pin, along the outer peripheral surface of this pin to the other side surface, and at the position near the end of the panel. The carbon coating device according to any one of claims 6 to 10, characterized in that.