JPH11191370A - Trimming method of cathode-ray tube and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a trimming device of cathode-ray tube that surely removes excessive coating adhered on whole area of a panel pin and that a brush can be easily replaced. SOLUTION: A panel 11 is transferred onto a trimming device 21 by a transferring device 13, and then it is positioned in a trimming position by a panel positioning device 22. A dive mechanism 29 works a brush 23 on a head part 30 is moved so that an end surface part of the brush 23 faces to a tip of a panel pin 12. The brush 23 is moved in a butting direction toward the panel pin 12, and a plurality of contact bodies having slit-shape cutouts are contacted onto an outer surface of the panel pin 12 along an axis direction to remove excessive coating adhered on the outer surface of the panel pin 12. A plurality of contact bodies contact in a state that they are respectively rubbing against the outer surface of the panel pin 12. Excessive coating on a boundary par of a base part and a projecting par of the panel pin 12 is surely wiped and removed. The brush 23 is turned around an axis core by a turning drive part 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube trimming method and apparatus for removing paint adhered to panel pins implanted on the inner peripheral surface of a panel of a cathode ray tube when forming an inner surface film of the panel.

[0002]

2. Description of the Related Art Generally, in a process of manufacturing a cathode ray tube, there is a process of applying a fluorescent film material to an inner surface of a panel to form an inner surface film. At this time, surplus paint adheres also to the panel pins planted on the inner peripheral surface of the panel, and if the adhered paint is left as it is, it adversely affects the performance as a cathode ray tube. There is a need to.

A conventional technique for removing such excess paint from the panel pins will be described with reference to FIGS. 4 and 5. FIG.

In FIGS. 4 and 5, reference numeral 11 denotes a panel of a cathode ray tube. A plurality of panel pins 12 are planted on the inner peripheral surface of the panel 11, and the inner surface of the panel 11 is provided with a fluorescent light in a preceding step (not shown). This panel is coated with membrane paint.
A trimming device 14 for removing excess paint adhering to the panel pins 12 by a transport device 13 having a mechanism for rotating the 11
Relocated above.

The trimming device 14 has a support 16 which is driven vertically by a cylinder 15 provided in a vertical direction, and a pair of left and right brushes 17 for cleaning panel pins are provided on the support 16. ing. These pair of brushes
17 are supported by a slide guide 19 provided on a support base 16 via a support member 18 so as to be movable in the left-right direction. The pair of left and right brushes are driven to open and close in the left and right directions by a cylinder 20 provided between the support members 18 in the horizontal direction.

In such a trimming device 14, when the panel 11 having the inner surface coated with the fluorescent film paint is transferred to a predetermined position by the transfer device 13, the cylinder 15 operates and the support base 16 is moved.
The upper pair of brushes 17 is raised to a position facing the panel pins 12. Next, at this raised position, the cylinder 20 is operated to open the pair of brushes 17 left and right, and the pair of brushes 17 are brought into contact with the corresponding panel pins 12. By the contact of the brush 17, the excess paint adhered to the panel pin 12 is wiped off and removed.

As shown in FIG. 5, the panel pin 12 has a base portion 12a having a relatively large diameter and a tapered projection 12b having a relatively small diameter. For this reason, as shown in FIG. 4, it was not possible to wipe off excess paint adhering around the boundary between the base portion 12a and the protruding portion 12b only by bringing the brush 17 into contact with the panel pin 12. Further, since the brush 17 becomes dirty every time the paint is wiped off, the wiping efficiency becomes poor unless the brush is replaced frequently. Therefore, it is desired that the brush 17 can be easily and automatically replaced.

[0008]

As described above, in the prior art, it is difficult to wipe off excess paint around the boundary between the base portion 12a and the protrusion 12b of the panel pin 12.
No particular consideration is given to brush replacement.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a method and an apparatus for trimming a cathode ray tube which can reliably remove excess paint adhering to the entire panel pin and can easily replace the brush. It is in.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a cylindrical brush provided with a plurality of flexible contact members divided along an axial direction from an end face portion is advanced and retracted along an axis. By contacting the plurality of contact members from the end surface to the outer peripheral surface of the panel pin, it is possible to reliably remove excess paint adhering to the entire panel pin.

Further, if the brush is rotated about the axis in a state in which the brush is in contact with the plurality of contact members so as to wrap the panel pin, surplus paint can be more reliably removed.

In addition, by changing the driving mechanism of the brush, the surplus paint can be removed from a plurality of panel pins provided on the inner peripheral surface of the panel by one brush, thereby improving the equipment efficiency.

Further, the brush to which the paint has adhered by the removing operation is detached from the drive mechanism at a predetermined detachment position and is washed, and after the washing, is attached to the drive mechanism again. And a good wiping state with a brush can be maintained.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a panel 11 of a cathode ray tube to be trimmed has a plurality of panel pins 12 implanted on an inner peripheral surface thereof, and a fluorescent film paint is applied to the inner surface of the panel 11 in a previous step. Have been. This panel 11 is transferred to a trimming device 21 for removing excess paint adhered to the panel pins 12 by a transport device 13 having a mechanism capable of rotating,
It is positioned by the panel positioning device 22.

The trimming device 21 has a brush 23 as a surplus paint removing means.
For example, as shown in FIG. 3, it is formed in a cylindrical shape by an elastic body, and a slit-shaped cutout 24 is formed from the end face portion along the axial direction, and the cutout 24 has a plurality of flexible portions divided from each other. A contact body 25 is formed.

The brush 23 is detachably held by a holding portion 31 provided in a head portion 30 of a driving mechanism 29 as a driving means having a robot function. Drive mechanism 29
Position the brush 23 so that the end face thereof faces the tip of the panel pin 12, move the brush 23 forward and backward along the axis, and insert the panel pin 12 into each of the plurality of divided contact bodies 25. Contact. Also. The head part 30 of the drive mechanism 29 is provided with a rotation drive part 32 for rotating the brush 23 about the axis.

The driving mechanism 29 includes a plurality of, for example, usually four, brushes 23 each having an end surface provided on the inner peripheral surface of the panel 11.
A turning function is provided to turn the head section 30 so as to face the front ends of the panel pins 12 of the book. further,
The drive mechanism 29 has a function of detaching the brush 23 held by the holding unit 31 at a predetermined attachment / detachment position and attaching a new brush 23 to the holding unit 31.

Further, a brush cleaning device 34 is provided at a predetermined attachment / detachment position to wash the brush 23 detached from the holding portion 31 of the driving mechanism 29 and to attach the washed brush 23 to / from the attachment / detachment position of the holding portion 31. Position.

That is, the brush cleaning device 34 is provided in FIG.
As shown in the figure, a rotary table 35 that rotates counterclockwise is provided, and the rotary table 35 is provided with four brush holding heads 36. This rotary table 35 is 45 °
The intermittent drive is performed at the rotation angle of, and the stop position of each brush holding head 36 due to the intermittent drive is a working position described below.

That is, A is a detachable position, where the brush 23 is detached from the holding portion 31 of the drive mechanism 29 shown in FIG. B and C are cleaning positions, and the brush 23 detached from the holding unit 31 at the attachment / detachment position A is cleaned by the cleaning nozzle 37. Further, D is a squeezing position, where the washed brush 23 is squeezed by the squeezing mechanism 38 and dehydrated.

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

First, the panel 11 having the inner surface coated with the fluorescent film paint is transported onto the trimming device 21 by the transport device 13 and is positioned at a predetermined trimming position by the panel positioning device 22.

In this state, the drive mechanism 29 operates,
The brush 23 held by the holding section 31 of the head section 30 is moved so that the end face thereof faces the tip of the panel pin 12 attached to the inner peripheral surface of the panel 11. Thereafter, the brush 23 is moved in the butting direction toward the panel pin 12, and the plurality of contact bodies 25 divided by the slit-shaped cuts 24 are formed.
To the outer peripheral surface of the panel pin 12 along the axial direction.

By the contact with the plurality of contact members 25, excess paint adhered to the outer peripheral surface of the panel pin 12 is removed. In particular, the plurality of contact bodies 25 are
Each contact is made by rubbing in the axial direction.
The surplus paint around the boundary between the base 12a and the protrusion 12b can also be wiped off.

When the brush 23 is rotated about the axis by the rotation drive unit 32 in a state where the plurality of contact members 25 are in contact with the outer periphery of the panel pin 12, the wiping effect on the panel pin 12 is further increased, and The surplus paint adhered to the surface can be more reliably removed.

When the wiping of one panel pin 12 is completed in this way, the driving mechanism 29
23 is retracted, the head portion 30 is turned toward the next panel pin 12 by the turning function, and excess paint adhered to the panel pin 12 is wiped off in the same manner. Panel 11
Wipe off all panel pins 12 provided on the inner peripheral surface of.

When the wiping of all the panel pins 12 is completed, a large amount of the wiped paint adheres to the brush 23, and the drive mechanism 29 moves the head unit 30 to a predetermined attachment / detachment position in order to wash the paint. Move,
At this attachment / detachment position, the brush 23 is detached from the holding section 31.
A new brush 23 is attached to the holding portion 31 from which the brush 23 has been detached at this attaching / detaching position, and the panel pin of the next panel 11 is
Used to wash 12

The brush 23 detached from the holding portion 31 is
It is held at a detachable position A by a brush holding head 36 provided on a rotary table 35 of a brush cleaning device 34. The brush 23 held by the brush holding head 36 is cleaned by the cleaning liquid from the cleaning nozzle 37 at the cleaning positions B and C, respectively, with the intermittent rotation of the rotary table 35, and further squeezed by the squeezing mechanism 38 at the squeezing position D. Operated. The brush 23, which has been washed through the position D, can be reused.
, Is mounted on the holding unit 31 again.

In this manner, the brush 23 can be easily attached to and detached from the drive mechanism 29 and wiped off with a clean brush with little applied paint, so that the panel pins 12 can be efficiently wiped. Further, delivery of the brush 23 to the brush cleaning device 34 is easy, and brush cleaning can be facilitated.

[0031]

According to the present invention, it is possible to reliably remove excess paint adhering to the entire panel pin including the vicinity of the boundary between the base and the projection of the panel pin.

If the brush is rotated about the axis, the surplus paint can be more reliably removed.

Further, by turning the head holding the brushes, it is possible to remove excess paint from a plurality of panel pins provided on the inner peripheral surface of the panel with one brush, thereby improving equipment efficiency.

Further, the brush can be easily replaced, the cleaning thereof can be easily dealt with, and a good wiping state by a clean brush can be maintained.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a cathode ray tube trimming apparatus according to the present invention.

FIG. 2 is a plan view showing the same brush cleaning device.

FIG. 3 is a perspective view and a front view showing an example of the shape of the brush.

FIG. 4 is a front view of a conventional cathode ray tube trimming device.

FIG. 5 is a partially enlarged view showing the same wiping state.

[Explanation of symbols]

 11 Panel 12 Panel pin 21 Trimming device 23 Brush as means for removing excess paint 25 Contact body 29 Drive mechanism as drive means 32 Rotary drive unit 34 Brush cleaning device

Claims (7)

[Claims] 1. A method of trimming a cathode ray tube for removing paint adhered to a panel pin implanted on an inner peripheral surface of a panel of a cathode ray tube when forming an inner surface film of the panel of the cathode ray tube, the method comprising: Moving the cylindrical brush provided with a plurality of flexible contact members divided so as to make the plurality of contact members contact the outer peripheral surface of the panel pin from the end face portion in the axial direction. A method for trimming a cathode ray tube, comprising removing adhering paint from the material. 2. The method for trimming a cathode ray tube according to claim 1, wherein the contact body is rotated about an axis while being in contact with the outer peripheral surface of the panel pin. 3. A cathode ray tube trimming device for removing paint adhering to a panel pin implanted on an inner peripheral surface of a panel of a cathode ray tube at the time of forming an inner surface film of the panel of the cathode ray tube. And a drive means for relatively moving the excess paint removing means so that the excess paint removing means contacts the outer peripheral surface of the panel pin from the end face portion along the axial direction. A cathode ray tube trimming apparatus characterized by the above-mentioned. 4. A trimming device for a cathode ray tube for removing paint adhered to a panel pin implanted on an inner peripheral surface of a panel of the cathode ray tube when an inner surface film of the panel of the cathode ray tube is formed. A cylindrical brush provided with a plurality of flexible contact members divided into a plurality of contact members, and the brush is detachably held, and the plurality of contact members are attached to the outer peripheral surface of the panel pin from an end face portion. A cathode-ray tube trimming device, comprising: a driving mechanism for relatively moving so as to make contact along the axial direction. 5. The cathode ray tube trimming device according to claim 4, wherein the drive mechanism has a rotation drive unit for rotating the brush about an axis. 6. The driving mechanism according to claim 4, wherein the driving mechanism has a turning function of turning the brush so as to face a plurality of panel pins provided on an inner peripheral surface of the panel.
Or the trimming device for a cathode ray tube according to 5. 7. The drive mechanism has a function of detaching the brush at a predetermined attachment / detachment position and attaching a new brush. The drive mechanism is provided at the predetermined attachment / detachment position and detached from the drive mechanism. 7. The cathode ray tube trimming device according to claim 6, further comprising a brush cleaning device for cleaning the brush and positioning the cleaned brush at a position where the brush is attached to the drive mechanism.