JPH0329237A - Application of insulating agent and device therefor - Google Patents

Abstract

PURPOSE:To make it possible to perform multikind mixed production while performing almost circular application by closely contacting an application member with an application surface of a bulb to rotate the application member round an anode button as a center by means of a rotary driving device for applying an insulating agent around the button. CONSTITUTION:When positioning of a bulb and supply of an insulating agent are finished, a robot 12 is transferred to the upper part of an anode button 5 according to a preinstructed program to rotate an application brush 17 while closely contacting the application surface of the bulb 4. At this time, when the upper and lower parts of the application surface are to be applied, the rotary axis 30 of the application brush is tilted to the side of application for performing application. By doing in this way, the brush 17 comes to close contact with the bulb 4 to further outside so as to prevent the application width from becoming small on the upper and lower part. By rotating the brush 17 in this way while rocking the rotary axis 30 up and down, the insulating agent can be applied around the anode button almost in an circular shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for manufacturing cathode ray tubes, such as color picture tubes, and more particularly to a method and apparatus for applying an insulating agent around an anode button.

[Prior Art] As shown in FIG. 5, a cathode ray tube bulb 4 includes a panel L, a funnel 2, and a neck 3, and at a predetermined position of the funnel 2 is an anode button 5 to which a high voltage anode is connected.
An insulating agent coating portion 6 such as silicone resin is formed around the anode button 5 . Further, 7 is external conductor*g graphite.

A conventional insulating agent applicator is, for example, the Utility Model Application Publication No. 59-1709.
There is a coating device according to No. 54. This will be explained with reference to FIG. 6. The valve 4 is placed on the mounting table 10 with the panel 1 facing down, and positioned by the pusher 9 and the stopper 8. The applicator I1 moves forward in conjunction with the pusher 9,
An applicator brush 11a fixed at the tip comes into contact with the funnel 2, and is rotated around the anode button 5 by a motor (not shown) to apply the insulating agent in a circular shape around the anode button 5.

[Problem to be solved by the invention]

In the conventional insulation coating equipment mentioned above, the coating position is determined mechanically, so when applying different sizes of products,
It is necessary to replace parts and adjust the position of the stopper 8 each time, and it is also necessary to replace the coating brush for products with different coating diameters, so it is not suitable for production of other products.
For example, when installing on an automated line, it is necessary to install a plurality of dedicated coating machines for each product type, which has the drawbacks of increased installation space and expensive equipment costs.

Another problem is that the anode button 5 is embedded in a curved part of the outer surface of the bulb, and the cross-sectional shape of the applied surface has different curvatures in the longitudinal and transverse sections.
Even when the coating member was rotated around the anode button 5, the range in which the coating member contacted the bulb was different in the vertical direction and the horizontal direction, and the coating surface was coated in an elliptical shape with the horizontal axis as the major axis.

SUMMARY OF THE INVENTION An object of the present invention is to provide an insulating agent coating method and apparatus that solve the above-mentioned problems.

[Differences between the invention and the prior art 1] The present invention differs from the conventional insulating agent coating device described above in that a variable sequence robot is used in the device body, and a coating member is detachably provided. has.

[Means to solve the problem]

In order to achieve the above object, in the method of applying an insulating agent according to the present invention, in the method of applying an insulating agent around the anode button of a cathode ray tube bulb, an applicator is fixed to a variable sequence robot, and the applying member is fixed to the variable sequence robot. By teaching, the insulating agent is applied by bringing the application member impregnated with the insulating agent into contact with the bulb and rotating it around the anode button.

Further, the insulating agent coating device according to the present invention includes a variable sequence robot, a coating member whose rotation and attachment/detachment can be adjusted at the tip of the arm of the variable sequence robot by a rotary drive device and a chuck mechanism, and a valve. A positioning mechanism that fixes the tube axis direction and rotation direction around the tube axis at a desired position, a device that circulates the insulating agent and supplies it to the supply tray, and a mechanism that squeezes the insulating agent impregnated into the application member. The application member is brought into contact with the insulating agent in the supply tray to supply the insulating agent, the insulating agent impregnated in the application member is squeezed by a squeezing mechanism, and then the application member is brought into contact with the application surface of the valve. Then, the insulating agent is applied around the anode button by rotating the application member around the anode button using a rotational drive device.

【Example} Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a side view showing an embodiment of the present invention.

In the figure, the valve 4 is placed on a pallet l3 with the panel l facing down and the anode button 5 facing the direction in which an articulated robot (hereinafter referred to as robot) 12 as a variable sequence robot is placed. is sent to the application position by

When the coating position is reached, the positioning pusher 14 presses the bulb 4 from four directions around the outer circumference of the bulb 4, thereby positioning the bulb 4 in the tube axis direction and in the rotational direction around the tube axis.

Note that the positioning pushers l4 have a pair of opposing positioning pushers 14 connected to a rack and a pinion (
(not shown), the structure is such that the valve 4 is pressed while always maintaining an equal distance from the reference line l5, so that the tube axis of the valve 4 is always aligned with the reference line l5 even if the types and sizes of the valves 4 are different. They can be positioned to match.

The robot l2 is installed on a pedestal l6. robot 1
The coating brush l7 provided at the tip of the arm 2 is connected to the motor l8.
It rotates around the shaft of a motor l8, and is detachably handled by an air chuck l9.

Further, a supply tray 20 is arranged within the operating range of the robot 12 near the robot 12. Insulating agent is supplied to the supply tray 20 by a rotary pump 22 from a tank 2l installed at the bottom. Furthermore, from the bottom of the supply tray 20, it is returned to the tank 2l via the tube 30,
Precipitation is prevented by circulating the insulating agent.

To supply insulation to the coating brush 17 during positioning of the valve 4, the coating brush 17 is dipped into the insulation in the supply tray 20. However, at this point, the amount of insulating agent impregnated into the coating brush 17 is generally larger than the amount consumed during coating, so as the number of coatings increases, the amount of insulating agent impregnated into the coating brush 17 increases, causing pooling and dripping. is more likely to occur. For this reason, in the embodiment according to the present invention, after supplying the insulating agent to the coating brush 17,
A squeezing machine 2 operated by a cylinder 23 to apply the coating 17
Step 4: Press from both sides to squeeze out excess insulating material so that the amount of impregnation remains constant.

The above operations of supplying the insulating agent and squeezing the robot 12 are taught in advance to the robot 12, and are automatically performed by inputting a signal.

As described above, when the positioning of the valve and the supply of the insulating agent are completed, the robot 12 starts the coating operation according to the teaching program inputted in advance. Apply coating brush 17 to valve 4
The application brush 17 is moved to the upper part of the anode button 5 and brought into contact with the application surface of the valve 4, and the application brush 17 is rotated by the motor 18.

At this time, the problem that the coated surface becomes elliptical when coated using a conventional apparatus is solved as follows. When coating the upper and lower parts of the coating surface as shown in FIG. 3, the coating is performed by tilting the rotating shaft 30 of the coating machine toward the coating side. In this way, the coating brush 17 can reach the outer side of the valve 4.
This prevents the coating width from becoming smaller at the top and bottom.

As described above, by rotating the coating brush 17 while swinging the rotating shaft 30 up and down, the insulating agent can be applied in a substantially circular shape around the anode button 5.

In this embodiment, the rotation speed of the coating brush 17 is approximately 60 to +2 or
, p, m is appropriate, and coating is completed in 2 to 3 rotations at this rotation speed.

By using the robot 12, even if there are differences in the position of the anode button 5 and the inclination of the application surface due to differences in the types of valves, it is possible to flexibly respond by teaching each type in advance.

Next, we will describe a method that can be applied to products with different coating diameters.

As mentioned above, even if the valve types are different, if the application diameter is the same, it can be handled by teaching each type separately.
It is necessary to replace the coater with a length corresponding to each coat diameter.

In the embodiment of the present invention, it is possible to automatically replace the coating brush 17 by detachably handling the coating brush 17 via the air chuck 19.

As shown in Figure 2, there are multiple application brushes 17 corresponding to each application diameter.
is set in the fixing groove 25 on the supply tray 20. In this state, the coating brush 17 is immersed in the insulating agent in the supply tray 420, so the coating brush 17 does not dry out. In addition, each coated eight pieces l7 are attached to the fixing groove 25.
By making the robot l2 correspond to the plurality of set positions above, the robot l2 can be taught which coating brush 17 should be used. for example,
The robot 12 is instructed to use the coating hole 17 on the left side of the fixed groove 25 for the product with a coating diameter of φ70.

In this way, eight coatings 17 corresponding to each coating diameter are prepared in advance.
By teaching which position in the fixed groove 25 to take out the coating brush, when the signal of the coating diameter of the product type is input to the robot l2, if the coating diameter is different, the coating brush l7 that is currently being handled will be automatically changed. Return the coating brush l7 to the predetermined position in the fixing groove 25, and insert a new coating brush l7 corresponding to the coating diameter into the fixing groove 2.
A series of coating operations can be performed by handling from step 5. Further, when handling the coating brush 17 with the air chuck 19, the position is fixed by the positioning pin 26 and the pin hole 27.

Next, the characteristics of a product coated with an insulating agent in an example according to the present invention will be described based on FIG.

In coating according to the present invention, the coating member is brought into contact with the valve and rotated, so as shown in FIG. 4(a), the anode button 5
A thin line 28 can be seen concentrically around the center. However, this streak 28 does not affect the type of product. In addition, the boundary 29 of the applied surface is clear,
By performing the up-and-down movement of the rotating shaft during coating, the coating is applied in a substantially circular shape.

On the other hand, in the case of coating using a conventional device, as shown in FIG. 4(b), concentric streaks 28 and clear boundaries 29 are similar to those in FIG. 4(a), but the rotation axis is Because it is fixed, the application shape is elliptical.

Another method is a one-way spray coating method, but in this case, as shown in Figure 4(c), the coating shape is almost circular and there are no streaks, but the border 29 appears blurred. ,unclear.

Incidentally, in the embodiment according to the present invention, a coating member was used, but it goes without saying that the present invention is effective even when other coating members such as a sponge are used.

[Effects of the Invention] As explained above, by using a robot, the present invention can handle multiple types of valves with different types and coating diameters, so it is possible to reduce the installation space in automated lines that perform mixed production of various types. This has the effect of lowering equipment costs.

Further, by performing a vertically oscillating motion during application, it is possible to apply the application in a substantially circular shape.

[Brief explanation of drawings]

FIG. 1 is a side view showing an insulating agent coating device according to the present invention;
Fig. 2 is a perspective view showing the air chuck unit and the supply tray showing a method of replacing the eight coating parts, Fig. 3 is a side view showing the state of vertical bridge movement of the rotating shaft in the embodiment according to the present invention, and Fig. 4 ( a), (b), and (c) are front views showing the state of each coating applied by the coating device according to the present invention and the conventional coating device; FIG. 5 is a front view showing the appearance of a color cathode ray tube; FIG. 6 is a side view showing a conventional insulating agent coating device. 4...Valve 5...Anode button l
2...Robot 14...Positioning pusher l7...Coating brush l9...Air chuck 20...Supply tray 2l...Tank 22...Rotary pump 23...Cylinder 24
...wringer

Claims (2)

[Claims] (1) In a method of applying an insulating agent around the anode button of a cathode ray tube bulb, the applying member is fixed to a variable sequence robot, and the variable sequence robot is taught to apply the insulating agent impregnated with the applying member. A method of applying an insulating agent, characterized in that the insulating agent is applied by bringing it into contact with a bulb and rotating it around an anode button. (2) A variable sequence robot, a coating member whose rotation and attachment/detachment can be adjusted by a rotary drive device and a chuck mechanism at the tip of the arm of the variable sequence robot, and a valve that rotates in the tube axis direction and around the tube axis. It has a positioning mechanism for fixing the direction at a desired position, a device for circulating the insulating agent and supplying it to the supply tray, and a mechanism for squeezing out the insulating agent impregnated in the application member. The application member is brought into contact with the insulating agent, the insulating agent impregnated into the application member is squeezed by the squeezing mechanism, and then,
1. An insulating agent applicator, characterized in that the insulating agent is applied around the anode button by bringing the applicator into contact with the application surface of the bulb and rotating the applicator around the anode button using a rotary drive device.