JP3289502B2 - CRT panel cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a picture tube panel used for removing a phosphor slurry adhered to an inner wall of a skirt portion of a picture tube panel constituting a color picture tube.

[0002]

2. Description of the Related Art Generally, a color picture tube manufacturing process includes:
There is a step of forming a phosphor screen on the inner surface of the picture tube panel. In this step, the phosphor slurries of the three primary colors, red, green, and blue, are sequentially applied to the inner surface of the panel, and the phosphor slurries attached to the inner wall of the skirt portion of the panel are removed by a cleaning liquid (pure water or the like). I have. Conventionally, a method has been adopted in which a picture tube panel is rotated at the time of panel cleaning, and a cleaning liquid ejected from a cleaning nozzle is sprayed on an inner wall of a skirt portion to remove phosphor slurry.

As shown in FIG. 6, a front glass 52 of a picture tube panel 51 is formed into a cylindrical shape along its long side (L). For this reason,
As shown in FIG. 6, when the picture tube panel 51 is rotated, a curved surface portion 51a on the inner side of the panel formed by the front glass 52 of the picture tube panel 51 and the skirt portion 53 at the periphery thereof.
The position of the panel (hereinafter referred to as panel R) is displaced in a direction perpendicular to the seal edge surface f on the panel long side (L) with respect to the panel short side (S) and the panel corner (C). become.

[0004]

However, in the conventional cleaning device, the skirt portion 53 of the picture tube panel 51 is not provided.
A cleaning nozzle (not shown) is applied along the inner wall of the seal edge surface f.
Since the distance between the inner wall of the skirt portion 53 and the cleaning nozzle is kept constant while being moved in parallel with the above, the cleaning liquid ejected from the cleaning nozzle spreads sufficiently to the panel R portion 51a on the long side (L) of the panel. However, there is a problem that the phosphor slurry remains there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a picture tube panel capable of reliably removing a phosphor slurry adhered to the inner wall of a skirt portion of the picture tube panel. Another object of the present invention is to provide a cleaning device.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and is directed to a picture tube panel cleaning apparatus for removing a phosphor slurry adhered to an inner wall of a skirt portion of a picture tube panel with a cleaning liquid. A rotating disk head having a cam surface on the outer peripheral surface corresponding to the direction of the CRT panel in the supported state, and a panel supporting unit for rotatably supporting the CRT panel via the rotating disk head; and a panel supporting unit. A cleaning nozzle that is arranged to face the inner wall of the skirt portion of the supported picture tube panel and sprays a cleaning liquid onto the inner wall of the skirt portion, and movably supports the cleaning nozzle in a direction perpendicular to the seal edge surface of the picture tube panel. The first cylinder is parallel to the seal edge surface of the picture tube panel following the cam surface while being pressed against the outer peripheral surface of the rotating disk head. A scanning roller that moves, and a second cylinder that is connected to the first cylinder via a pipe and that causes a driving force transmission medium sealed in the pipe to flow in accordance with the movement of the copying roller. .

Further, a liquid (preferably water) is used as a driving force transmitting medium.

[0008]

In the apparatus for cleaning a picture tube panel according to the present invention,
When the picture tube panel supported via the rotating disk head is rotated, the copying roller pressed against the outer peripheral surface of the rotating disk head moves along the cam surface in parallel with the seal edge surface of the picture tube panel. By the movement of the copying roller, the driving force of the second cylinder is transmitted to the first cylinder by the flow of the driving force transmission medium. For this reason, the cleaning nozzle supported by the first cylinder moves in the direction perpendicular to the seal edge surface along the panel R in accordance with the moving direction and the moving amount of the copying roller, and the skirt portion of the picture tube panel. Since the cleaning liquid is sprayed on the inner wall, the cleaning liquid sufficiently spreads to the panel R on the long side of the panel.

Further, when a liquid having extremely low compressibility is used as the driving force transmission medium, the driving force of the second cylinder obtained by the movement of the copying roller is reliably transmitted to the first cylinder. Further, if the liquid is water, no problem arises when the driving force transmission medium leaks from the pipe and adheres to the picture tube panel.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view for explaining one embodiment of a picture tube cleaning apparatus according to the present invention. The main components of the cleaning apparatus 1 of the present embodiment include a panel support unit 3 that rotatably supports the picture tube panel 2 and a cleaning nozzle 4 that sprays a cleaning liquid onto the inner wall 2a of the skirt portion of the picture tube panel 2. A first cylinder 5 supporting the cleaning nozzle 4, a scanning roller 6 moving parallel to the seal edge surface f of the picture tube panel 2, and a first cylinder 5 connected to the first cylinder 5 via a pipe 7. And two cylinders 8.

The panel support unit 3 includes a rotary disk head 11 connected to an output shaft of the rotary drive unit 9 via a connecting member 10. A cover 12 is attached to the lower surface of the rotating disk head 11 so as to cover the outer peripheral surface of the picture tube panel 2. In addition, a panel chuck member (not shown) is provided at the center of the lower surface of the rotating disk head 11, and the picture tube panel 2 is supported by the rotating disk head 11 by the panel chuck member.

On the other hand, a cam surface 13 corresponding to the direction of the picture tube panel 2 in a supported state is formed on the outer peripheral surface of the rotary disk head 11, as shown in FIG. The cam surface 13 is formed so as to be located on the long side (L side in the figure) of the picture tube panel 2 in the supported state, and its formation range is the rotation center of the rotary disk head 11 (in the supported state). The angle range θ is defined by virtual lines K1 connecting the center of the picture tube panel 2) and the panel corners. In such an angle range θ, the rotating disk head 1
The first cam surface 13 is formed so as to gradually protrude outward from the disk, and is in the state of protruding most at the center of the long side (L) of the picture tube panel 2. This is because the seal edge surface f on the long side (L) of the picture tube panel 2
The distance between the panel (FIG. 1) and the panel R portion 2b (FIG. 1) is developed for each predetermined angle, and is formed starting from the position of an imaginary line K1 connecting the panel center and the panel corner. .

That is, since the front glass of the picture tube panel 2 is formed in a cylindrical shape (cylindrical) along the long side direction, the distance between the panel R portion 2b and the seal edge surface f on each line is: The length on the virtual line K2 is longer than the length on the virtual line K1, and the length on the virtual line K3 is longer than the length on the virtual line K2. The distance becomes the longest on an imaginary line K4 passing through the center of the long side (L) of the panel. Therefore, the protruding dimension of the cam surface 13 on each line is also proportional to the distance between the panel R portion 2b and the seal edge surface f at each location, and G1 and virtual line K on the virtual line K2.
On G3, G2 is larger than G1, and on the virtual line K3, G3 is larger than G2.

In the illustrated example, the angle of formation θ of the cam surface 13 is divided into six equal parts so that the degree of protrusion of the cam surface 13 on each line is changed stepwise. The arc shape of the panel R portion 2b on the long side of the panel 2 may be approximated, and the arc shape may be directly transferred to the cam surface 13.

On the other hand, on the short side (S side in the figure) of the picture tube panel 2 bounded by the virtual line K1, the distance between the panel R portion 2b and the seal edge surface f is constant at any point. Become. Therefore, the formation angle range θ of the cam surface 13
In the region beyond the above, the outer peripheral surface of the rotary disk head 11 is formed in a substantially perfect circular shape.

As shown in FIG. 1, the cleaning nozzle 4 is disposed so as to face the skirt inner wall 2a of the picture tube panel 2 supported by the panel support unit 3. A pipe 14 is connected to the base end (the lower end in the figure) of the cleaning nozzle 4, and the cleaning liquid supplied via the pipe 14 is ejected from an outlet (not shown) at the tip of the nozzle. ing.

As shown in FIGS. 1 and 3, the first cylinder 5 is attached to one side surface of the support plate 15 by screwing or the like. A bracket 16 is fixed to the piston rod of the first cylinder 5, and a rod portion of the cleaning nozzle 4 is fastened to the tip of the bracket 16. An intermediate member 17 is fixed to the lower end of the support plate 15 by screwing or the like. The intermediate member 17 is connected to a boss 19 fitted to the rotating shaft 18, and a key 20 (FIG. 3) as a detent is inserted into a fitting portion between the rotating shaft 18 and the boss 19. .

As shown in FIGS. 1 and 2, the copying roller 6 is rotatably attached to the tip of the movable plate 21. The movable plate 21 corresponds to the above-described virtual line K4.
Slide guide unit 2 arranged along (FIG. 2)
2 so as to be movable. The slide guide unit 22 is mounted on a base plate 24 fixed to an upper end of a holding plate 23.

On the base plate 24, a second cylinder 8 is fixed in parallel with the slide guide unit 22. The piston rod of the second cylinder 8 is L
The other end of the L-shaped member is fixed to a side end surface of the movable plate 21. Here, a spring member (not shown) is incorporated in the slide guide unit 22, and the copying roller 6 is constantly urged toward the cleaning nozzle 4 (right side in the figure) by the elastic force of the spring member. Further, the second cylinder 8 is connected to the first cylinder 5 via the pipe 7 as described above. Liquid is sealed inside the pipe 7 as a driving force transmission medium, and when the piston rod of the second cylinder 8 is drawn in, the piston rod of the first cylinder 5 is moved by the flow of the driving force transmission medium. Is pushed out, and when the piston rod of the second cylinder 8 is pushed out, the piston rod of the first cylinder 5 is drawn in by the flow of the driving force transmission medium.

On the other hand, the lower end of the holding plate 23 is also connected to the rotating shaft 18 via a bearing block 26 similarly to the above-mentioned support plate 15. Further, a bearing member 27 is axially mounted on the rotating shaft 18, and an air nozzle 29 is connected to the bearing member 27 via an arm block 28. The air nozzle 29 is arranged to face the inner wall 2a of the skirt portion of the picture tube panel 2 in a back-to-back state with the cleaning nozzle 4 in panel cleaning. Then, air is blown onto the inner wall 2a of the skirt onto which the cleaning liquid has been sprayed to be dried.

Next, the operation of the picture tube panel cleaning apparatus 1 of this embodiment will be described. First, in the panel support unit 3, the picture tube panel 2 is
, The rotation shaft 18 rotates by a predetermined angle by driving an actuator (not shown). As a result, the support plate 15, the holding plate 23, and the arm block 28 swing integrally with the rotation shaft 18 as a support shaft, so that the copying roller 6 comes into pressure contact with the outer peripheral surface of the rotating disk head 11, and And air nozzle 2
9 are arranged opposite to the inner wall 2a of the skirt portion of the picture tube panel 2, respectively.

Next, the rotating disk head 11 is rotated integrally with the picture tube panel 2 by the driving force of the rotating drive unit 9 of the panel support unit 3 and the cleaning nozzle 4 is rotated.
A cleaning liquid such as pure water spouts from the picture tube panel 2
Is sprayed on the inner wall 2a of the skirt.

At this time, the copying roller 6 rotatably attached to the movable plate 21 is pressed against the outer peripheral surface of the rotary disk head 11 by the elastic force of a spring member (not shown) incorporated in the slide guide unit 22. Then, it moves parallel to the seal edge surface f of the picture tube panel 2 following the cam surface 13 formed thereon.

That is, as shown in FIG. 2, for example, when the rotating disk head 11 is rotating in the R direction in the figure,
In the forming angle range θ, the copying roller 6 that is in pressure contact with the cam surface 13 moves through the imaginary line K1 → K2 → K3 to K4.
, And then reach K1 via the virtual line K4 → K3 → K2. At this time, in the section from the virtual line K1 to K4, the cam surface 13 on each line
The copying roller 6 is displaced in the direction of the arrow A in the figure in accordance with the protrusion dimensions G1 to G3 of the cam, and in the section from the virtual line K4 to K1, the protrusion dimension G of the cam surface 13 on each line.
The copying roller 6 is displaced in the direction of the arrow B in the figure according to 3 to G1. Then, in a region beyond the formation angle range θ of the cam surface 13, the copying roller 6 is held at the same position while being pressed against the outer peripheral surface of the rotary disk head 11.

When the copying roller 6 follows the cam surface 13 and moves parallel to the seal edge surface f, the piston rod of the second cylinder 8 reciprocates accordingly. Then, the driving force transmission medium in the pipe 7 flows according to the reciprocating motion of the piston rod of the second cylinder 8.

Here, as shown in FIGS. 2 and 4, when the copying roller 6 is displaced in the direction of arrow A following the cam surface 13 of the rotating disk head 11, the piston rod of the second cylinder 8 is displaced. Since it is pushed into the cylinder, the driving force transmitting medium in the pipe 7 flows from the second cylinder 8 to the first cylinder 5 side. As a result, the piston rod of the first cylinder 5 is pushed out of the cylinder, so that the cleaning nozzle 4 fixed to the bracket 16 gradually rises as the rotating disk head 11 rotates. Then, the seal edge surface f of the picture tube panel 2
Virtual line K4 where the distance from to the panel R part 2b is the longest
When the copying roller 6 reaches (FIG. 2), the cleaning nozzle 4 is arranged at the highest position.

On the other hand, when the copying roller 6 is displaced in the direction of the arrow B (FIG. 2) following the cam surface 13, the piston rod of the second cylinder 8 is pulled out from the cylinder. The force transmission medium flows from the first cylinder 5 to the second cylinder 8 side. As a result, the piston rod of the first cylinder 5 is drawn into the cylinder, so that the cleaning nozzle 4 gradually descends as the rotating disk head 11 rotates. And
When the roller 6 reaches the imaginary line K1 where the distance of the panel R portion 2b from the seal edge surface f is the shortest, the cleaning nozzle 4 is arranged at the lowest position, and then the panel short side (S) is cleaned. While it is held in the same position.

In this embodiment, since the liquid having extremely low compressibility is sealed in the pipe 7 as the driving force transmitting medium, the driving of the second cylinder 8 obtained by the moving operation of the copying roller 6 is performed. The force can be reliably transmitted to the first cylinder 5. Furthermore, if water (preferably pure water) is used as the liquid, there is no danger of damaging the picture tube panel 2 even if the driving force transmission medium leaks from the pipe and adheres to the picture tube panel 2.

When the phosphor slurry removal processing by the cleaning liquid is completed over the entire circumference of the picture tube panel 2, the supply of the cleaning liquid to the cleaning nozzle 4 is stopped, and the inner wall 2 of the skirt portion is cut off.
The spraying of the cleaning liquid on a is stopped. Thereafter, as a drying process of the inner surface of the panel, air is jetted from the air nozzle 29 while the rotating disk head 11 is rotated,
This is sprayed on the inner wall 2a of the skirt portion of the picture tube panel 1 to remove moisture. Finally, the copying roller 6 is separated from the rotating disk head 11 by the rotation of the rotating shaft 18, and the washing nozzle 4 and the air nozzle 29 are retracted from the inner surface of the panel, and the cleaned picture tube panel 2 is moved to the panel support unit 3. Remove from

FIGS. 5A and 5B show the positional relationship between the inner wall of the skirt portion and the cleaning nozzle during panel cleaning. FIG. 5A shows the case of the present embodiment, and FIG. 5B shows the case of the conventional example. ing. In FIG. 5, the inner wall of the skirt portion of the picture tube panel is developed in a plane, and the movement locus of the cleaning nozzle accompanying the rotation of the panel during cleaning is indicated by a two-dot chain line.

First, in the case of the conventional apparatus shown in FIG. 5B, the long side (L) and the short side (S) of the panel are perpendicular to the seal edge surface f of the picture tube panel. In any case, the cleaning nozzle 4 is always arranged at the same position. For this reason, even if the phosphor slurry can be removed to the panel R portion 2b on the short side of the panel (S), the cleaning liquid does not sufficiently spread to the panel R portion 2b on the long side of the panel (L). Phosphor slurry remains.

On the other hand, in the case of the present embodiment shown in FIG. 5A, the cleaning nozzle 4 is disposed on the long side (L) of the panel along with the seal edge surface f along the panel R portion 2b of the picture tube panel. Since the cleaning liquid moves in the orthogonal direction, the cleaning liquid sufficiently spreads to the panel R portion 2b not only on the panel short side (S) but also on the panel long side (L). For this reason, the phosphor slurry adhered to the inner wall 2a of the skirt portion over the entire circumference of the picture tube panel is reliably removed.

In the above embodiment, the picture tube panel 2 to be processed is supported horizontally by the panel support unit 3, but the present invention is not limited to this. For example, the picture tube panel 2 may be supported vertically, or may be supported by being inclined at a predetermined angle, in such a manner that the cleaning liquid sprayed on the inner wall 2a flows smoothly without collecting in the panel R portion 2b.

[0034]

As described above, according to the present invention,
When the picture tube panel supported by the panel support unit is rotated, the copying roller pressed against the outer peripheral surface of the rotating disk head follows the cam surface and moves parallel to the seal edge surface of the picture tube panel. The cleaning nozzle sprays the cleaning liquid on the inner wall of the skirt portion of the picture tube panel while the cleaning nozzle moves in the direction perpendicular to the seal edge surface following the panel R portion according to the moving operation. For this reason, on both the panel short side and the panel long side, the panel R
As a result, the cleaning liquid can sufficiently spread to the portion, and the phosphor slurry adhered to the inner wall of the skirt portion can be reliably removed over the entire circumference of the picture tube panel.

Further, by using a liquid having extremely low compressibility as the driving force transmitting medium, the driving force of the second cylinder obtained by the moving operation of the copying roller can be reliably ensured by the flow of the driving force transmitting medium. It is possible to transmit to the cylinder. Further, if the liquid is water,
Even if the driving force transmission medium leaks from the pipe and adheres to the picture tube panel, there is no risk of damaging the panel.

In addition, the mechanism for converting the movement of the copying roller into the movement of the cleaning nozzle with two cylinders interposed therebetween is extremely simple in structure. Therefore, the maintenance of the apparatus itself is easy and the equipment cost is low. Further, the driving force transmission ratio between the cylinders can be arbitrarily set only by changing the size of the cylinders.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an embodiment of a cleaning device for a picture tube panel according to the present invention.

FIG. 2 is a view taken in the direction of arrow C in FIG. 1;

FIG. 3 is a view as seen from an arrow D in FIG. 1;

FIG. 4 is a diagram illustrating the operation of the device.

FIG. 5 is a diagram showing a positional relationship between an inner wall of a skirt and a cleaning nozzle.

FIG. 6 is a diagram showing a structure of a picture tube panel.

FIG. 7 is a diagram showing a positional relationship when the panel is rotated.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 picture tube panel cleaning device 2 picture tube panel 2 a inner wall of skirt portion 2 b panel R portion 3 panel support unit 4 washing nozzle 5 first cylinder 6 copying roller 7 piping 8 second cylinder 11 rotating disk head 13 cam surface f seal Edge surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 9/227 H01J 9/38

Claims (3)

(57) [Claims] 1. A cleaning device for a picture tube panel for removing a phosphor slurry adhered to an inner wall of a skirt portion of the picture tube panel with a cleaning liquid, wherein a cam surface corresponding to a direction of the picture tube panel in a supported state is provided on an outer peripheral surface. A panel support unit that includes a rotating disk head and rotatably supports the picture tube panel via the rotating disk head; and a panel support unit that is disposed to face an inner wall of a skirt portion of the picture tube panel supported by the panel supporting unit. A cleaning nozzle for spraying a cleaning liquid onto an inner wall of the skirt portion; a first cylinder movably supporting the cleaning nozzle in a direction perpendicular to a seal edge surface of the picture tube panel; and an outer peripheral surface of the rotating disk head. A copying roller that moves in parallel with a seal edge surface of the picture tube panel while following the cam surface while being pressed; A second cylinder connected to the first cylinder via a pipe, and for causing the driving force transmission medium sealed in the pipe to flow in accordance with the movement of the copying roller. Cleaning equipment. 2. The cleaning device for a picture tube panel according to claim 1, wherein a liquid is used as the driving force transmission medium. 3. The apparatus according to claim 2, wherein the liquid is water.