JP3355744B2 - Panel cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a panel cleaning apparatus for trimming and cleaning a phosphor slurry adhered to an inner wall of a skirt portion of a panel constituting a cathode ray tube.

[0002]

2. Description of the Related Art Generally, during the manufacturing process of a cathode ray tube,
There is a step of forming a phosphor screen on the inner surface of the panel. In this step, the phosphor slurries of the three primary colors red, green and blue are applied to the inner surface of the panel, and then the phosphor slurries attached to the inner wall of the skirt are removed by trimming cleaning.

FIG. 5 is a side view showing an example of a conventional panel cleaning apparatus. In the illustrated conventional panel cleaning apparatus 80, reference numeral 81 denotes a support arm, which is rotatably supported by a pivot 82. A copying roller 83 is rotatably provided at the tip of the support arm 81. An engagement member 84 extends integrally from the base side of the support arm 81, and a cut groove 85 is formed in the engagement member 84. On the other hand, reference numeral 86 denotes a slide arm, and a cleaning nozzle 87 is attached to the slide arm 86. The slide arm 86 is slidably incorporated in the main arm 88, and these two arms are connected via a drive cylinder 89. The main arm 88 is rotatably supported by a pivot 90. One end of the main arm 88 starting from the pivot 90 is connected to an output shaft of a drive cylinder 91, and the other end of the main arm 88 is perpendicular to the drive cylinder 91. The end side is engaged with the notch 85 of the engaging member 84 via the engaging pin 92.

Next, the operation of the conventional panel cleaning apparatus 80 will be described. First, when the panel P is set on the panel rotating means (not shown), the driving arm 91 drives the support arm 81 and the main arm 88 to pivot with each other.
The panel P rotates about 90, and is in a state of being expanded more than the outer peripheral portion of the panel P. Next, the entire apparatus is moved to the panel P side by moving means (not shown), and at this time, the driving of the driving cylinder 91 is stopped. Thereby, the support arm 81
Is lowered by the urging force of the coil spring 93, and the copying roller 83 presses against the outer peripheral surface of the panel P.

At this time, the copying roller 83 rotates while being pressed against the outer peripheral surface of the panel P which rotates by the panel rotating means. At this time, the position of the outer peripheral portion of the panel P depends on the aspect ratio and overall shape of the panel P. Because of the fluctuation, the support arm 81 rotates about the pivot 82 following the movement, and the main arm 88 also rotates about the pivot 90 in conjunction with the movement of the support arm 81. Thereafter, when the copying operation of the support arm 81 by the copying roller 83 is stabilized,
The driving of the drive cylinder 89 causes the slide arm 86 to extend, whereby the cleaning nozzle 87 advances to the position shown by the two-dot chain line in the figure. In this state, the phosphor slurry adhered to the inner wall of the skirt portion (the portion hatched by a broken line in FIG. 5) of the panel P is removed by the cleaning water (pure water) supplied from the cleaning nozzle 87.

[0006]

In the conventional panel cleaning apparatus 80, however, the cleaning nozzle 87 and the skirt portion are rotated while rotating the main arm 88 about the pivot 90 in conjunction with the copying operation of the copying roller 83. Since the distance from the inner wall is kept constant, when cleaning the short side and the corner of the panel P, the amount of the cleaning nozzle 87 that enters the inner surface of the panel is insufficient, and the skirt portion extends over the entire circumference of the panel P. There has been a problem that the phosphor slurry attached to the inner wall cannot be sufficiently removed. In order to solve the above problem, it is conceivable to control the movement trajectory of the cleaning nozzle by using a multi-indirect multi-axis robot. In such a case, however, the movement of the cleaning nozzle is synchronized with the rotation of the panel. Since the trajectory must be precisely controlled, the control system of the robot becomes complicated and large-scale, and the equipment cost becomes enormous.

The present invention has been made to solve the above-mentioned problem, and can sufficiently remove the phosphor slurry adhered to the inner wall of the skirt over the entire periphery of the panel without spending enormous equipment costs. It is intended to provide a panel cleaning device.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and in an apparatus for cleaning an inner wall of a skirt portion of a panel constituting a cathode ray tube, an outer periphery of a panel which is rotated by panel rotating means. A copying unit that moves in parallel with the seal edge surface of the panel following the surface, and a cleaning nozzle unit that moves in parallel with the seal edge surface while maintaining a constant distance to the inner wall of the skirt in conjunction with the copying operation of the copying unit First driving means for moving the cleaning nozzle unit to the first cleaning position, a sensor for detecting a rotational position of the panel, and a cleaning nozzle unit for moving the cleaning nozzle unit to the first cleaning position based on an output signal of the sensor. And a second driving means for moving between the cleaning position and the second cleaning position closer to the inner surface of the panel.

The second drive means is movably provided in a direction perpendicular to the seal edge surface, and has a leading end engaged with a slide shaft supporting the cleaning nozzle unit and a rear end of the slide shaft. A cam plate having a cam groove, one end of which is rotatably supported on a support shaft, and a driving member for rotating the cam plate about the support shaft as a rotation center, is provided with the copying operation of the copying unit. When the rear end of the slide shaft is located at the center of rotation of the cam plate, the driving member rotates the cam plate.

[0010]

In the panel cleaning apparatus of the present invention, the second driving means is moved based on the output signal of the sensor while moving the cleaning nozzle unit in parallel with the sealing edge surface of the panel in conjunction with the copying operation of the copying unit. When the panel is driven to clean the short side of the panel, the cleaning nozzle unit is disposed at the first cleaning position, and when the long side of the panel is cleaned, the cleaning nozzle unit is disposed at the second cleaning position. By doing so, it becomes possible to sufficiently remove the phosphor slurry attached to the inner wall of the skirt over the entire circumference of the panel.

When the driving member rotates the cam plate when the rear end of the slide shaft is positioned at the center of rotation of the cam plate, the distance between the inner wall of the skirt portion of the panel and the cleaning nozzle unit is kept constant. In the state
Since the cleaning nozzle unit moves between the first cleaning position and the second cleaning position, splashing of the cleaning liquid due to a change in the position of the cleaning nozzle unit is prevented.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing one embodiment of a panel cleaning apparatus according to the present invention, and FIG.
It is an arrow view. FIG. 3 is a partially enlarged view of FIG.
FIG. 4 is a view on arrow F of FIG. The panel cleaning apparatus 1 of the present invention mainly includes a copying unit 2, a cleaning nozzle unit 3, a first driving unit, a sensor 4, and a second driving unit as its main components. Things.

First, the copying unit 2 shown in FIGS.
As shown in FIG. 1, a support plate 7 movably supported by a pair of left and right guide shafts 5 via slide bushes 6.
And a roller support member 8 fixed on the support plate 7, and three pairs of copying rollers 9 rotatably attached to the distal end of the roller support member 8. Here, the pair of guide shafts 5 are arranged so as to be parallel to the seal edge surface S of the panel P held by a panel rotating means (not shown).

The cleaning nozzle unit 3 includes a support plate 1
A nozzle 3a for supplying a cleaning liquid is disposed above the support plate 10 and a nozzle 3b for supplying air, below the support plate 10.
Is arranged. Here, the nozzle 3b for air supply
Is for drying the panel P by blowing air after removing the phosphor slurry with a cleaning liquid, and is supported by the same configuration as the nozzle 3a for supplying the cleaning liquid. The support plate 10 is provided with a guide bush 12 as described above.
And is movably supported by a pair of left and right guide shafts 13 via a pair. The pair of guide shafts 13
Are also arranged so as to be parallel to the seal edge surface S of the panel P held by panel rotating means (not shown).

Here, the copying unit 2 and the cleaning nozzle unit 3 described above are connected via a timing belt 14. More specifically, the timing belt 14
Has one end connected to the support plate 7 on the copying unit 2 side via the hook 15 and the other end connected to the support plate 10 on the cleaning nozzle unit 3 via the hook 16. Further, the timing belt 14 is hooked on a pair of pulleys 17a and 17b from the copying unit 2 to the cleaning nozzle unit 3. Further, the hook 1 is attached to the support plate 7 on the copying unit 2 side.
The other end of the timing belt 19 different from the above is connected to the other end of the timing belt 19 via
It is connected to a weight member 21 via a hook 20. The timing belt 19 is provided with a pair of pulleys 22 a and 22 b between the copying unit 2 and the weight member 21.
Has been caught on.

In the above configuration, the guide shaft 5 for movably guiding and supporting the copying unit 2 is provided with an upper plate 23.
A guide shaft 13 is provided between the upper plate 23 and the lower plate 25 so as to penetrate the middle plate 24 and movably guide and support the cleaning nozzle unit 3. I have. An air cylinder 26 for expanding the unit is attached to the middle plate 24 via a mounting hole (not shown), and an output shaft 27 of the air cylinder 26 is attached to the support plate 10 on the cleaning nozzle unit 3 side. They are arranged facing each other.

On the other hand, a pair of guide rails 29 is laid in parallel on a gantry 28 supporting the entire apparatus.
A plurality of slide blocks 30 are engaged with these guide rails 29. And each slide block 30
A main plate 31 is mounted and fixed on the upper side so as to bridge a pair of guide rails 29. An air cylinder 32 is provided between the pair of guide rails 29. An output shaft of the air cylinder 32 is attached to a lower surface side of the main plate 31, and the main plate 31 is driven by driving the air cylinder 32. It moves along the guide rail 29. Further, an angle member 33 for supporting the lower plate 25 is mounted on the front end side of the main plate 31, and a cylindrical body 34 slidably housing the weight member 21 is mounted on the rear end side. I have.

The sensor 4 detects the rotational position of the panel P which rotates by a panel rotating means (not shown). In this embodiment, the sensor 4 includes a pair of proximity switches 4a and 4b. These proximity switches 4a and 4b are fixed at predetermined intervals to a mounting plate 35 provided between the upper plate 23 and the middle plate 24.
The on / off state is switched when the copying unit 2 moving along the guide shaft 5 approaches.

The first driving means is a cleaning nozzle unit 3
Is advanced to a first cleaning position A (described later). In the present embodiment, an air cylinder 37 installed on the lower plate 25 via an intermediate plate 36 and an output shaft of the air cylinder 37 are attached. And a driving plate 38.

The second driving means moves the cleaning nozzle unit 3 between a first cleaning position A and a second cleaning position B closer to the inner surface of the panel than the first cleaning position A based on an output signal of the sensor 4. A slide shaft (for example, a spline shaft) movably provided in a direction perpendicular to the seal edge surface S of the panel P held by a panel rotating means (not shown).
39, a cam plate 41 whose one end is rotatably supported on a support shaft 40, and a driving member (for example, an air cylinder) 4 for rotating the cam plate 41 about the support shaft 40 as a rotation center.
And 2.

More specifically, the slide shaft 39
Is slidably engaged with a boss 43 fixed to the support plate 10, the cleaning nozzle unit 3 is attached to the front end of the boss 43 via the nozzle holder 11, and the roller 44 is mounted on the rear end. Is provided. on the other hand,
A cam groove 45 is formed in the cam plate 41, and the roller 44 is engaged with the cam groove 45. Also,
The support shaft 40 pivotally supporting the cam plate 41 is provided on a bearing plate 46 attached to the drive plate 38. The drive member 42 is fixed to an L-shaped bracket 47 attached to the drive plate 38, and its output shaft is engaged with a cam groove 45 of the cam plate 41 via a roller 48.

Next, the operation of the panel cleaning apparatus 1 of this embodiment will be described. First, when the panel P to be processed starts rotating by a panel rotating means (not shown), the air cylinder 26 for expanding the unit is operated, and the output shaft 27 advances to the cleaning nozzle unit 3 side. The output shaft 27 of the air cylinder 26 is connected to the support plate 1.
By depressing 0, the copying unit 2 and the cleaning nozzle unit 3 connected by the timing belt 14 move in directions away from each other along the guide shafts 5 and 13, respectively. As a result, the space between the units is larger than the outer peripheral portion of the panel P.

Next, the air cylinder 32 installed on the gantry 28 operates, and the entire apparatus advances to the panel P side. At this time, the output shaft 27 of the air cylinder 26 is pulled back. As a result, the copying unit 2 is moved downward in the drawing by the pulling force of the weight member 21 transmitted via the timing belt 19, and the copying roller 9 is accordingly moved.
Presses against the outer peripheral surface of the panel P and starts rotating. At this time, the cleaning nozzle unit 3 also moves upward in the figure in conjunction with the movement of the copying unit 2.

Here, the position of the outer peripheral portion of the panel P, which is rotated by a panel rotating means (not shown), varies vertically according to the aspect ratio and the overall shape of the panel P.
Following this, the copying unit 2 moves parallel to the seal edge surface S of the panel P, and at the same time, the cleaning nozzle unit 3 also moves parallel to the seal edge surface S in conjunction with the copying operation of the copying unit 2. At this time, the tip of each of the nozzles 3a and 3b is positioned at the seal edge surface S of the panel P.
Waiting at a position slightly retracted.

Subsequently, when the copying operation of the copying unit 2 is stabilized, the driving plate 38 moves forward to the panel P by the operation of the air cylinder 37 as the first driving means.
Accordingly, the cleaning nozzle unit 3 moves to the inner surface side of the panel P together with the above-described second driving means, and the first cleaning position A (FIG. 1), that is, the tip of each of the nozzles 3a and 3b becomes the skirt of the panel P. The portion (the portion hatched by a broken line in FIG. 1) advances to a position facing the inner wall. At this time, the cleaning liquid has already flown out of the cleaning liquid supply nozzle 3a, and the phosphor slurry attached to the inner wall of the skirt portion of the panel P is removed by the cleaning liquid supplied from the nozzle 3a. In addition, since the cleaning nozzle unit 3 moves in parallel with the seal edge surface S in conjunction with the copying operation of the copying unit 2, the distance between the cleaning nozzle unit 3 and the inner wall of the skirt portion of the panel P is always constant during cleaning. Be kept constant.

By the way, when the long side of the panel P is being cleaned and when the short side is being cleaned, the position of the R portion corresponding to the boundary between the panel front surface and the skirt portion on the inner surface of the panel is shown. As shown in FIG. 1, it is slightly displaced in a direction orthogonal to the seal edge surface S. Therefore, when the cleaning nozzle unit 3 is simply moved in parallel with the seal edge surface S in conjunction with the copying unit 2, the amount of the cleaning nozzle unit 3 entering the panel inner surface is insufficient when cleaning the inner wall of the skirt portion on the long side. As a result, a disadvantage arises in that the phosphor slurry on the long side cannot be sufficiently removed.

Therefore, in this embodiment, the above problem is solved as follows. First, as shown in FIG. 1, the position of the outer peripheral portion of the panel P, which rotates by driving the panel rotating means (not shown), moves the longest side closest to the center of the panel and moves the short side outside the outer side. . Then, the corner portion of the panel P corresponding to the boundary between the long side and the short side moves on the outermost side. Therefore, the copying roller 9 pressed against the outer peripheral surface of the panel P moves parallel to the seal edge surface S according to the rotation of the panel P, with the vertex at the point when it reaches the corner of the panel P.

Here, in the present embodiment, the copying roller 9
Unit 2 reaches the corner of panel P
Is facing the one (upper side in the figure) proximity switch 4a, and the copying unit 2 is moved in the state where the copying roller 9 reaches the central portion on the long side of the panel P, and the other side (lower side in the figure) proximity switch 4b.
The mounting interval of each of the proximity switches 4a and 4b is set so as to face. Therefore, before the side facing the cleaning nozzle unit 3 is switched from the short side to the long side, one of the proximity switches 4a is continuously operated by the copying unit 2.
On the other hand, before the side facing the cleaning nozzle unit 3 is switched from the long side to the short side, the other proximity switch 4b detects the copying unit 2, and subsequently Of the proximity switch 4a senses the copying unit 2.

Then, the second driving means is the sensor 4 (4
a, 4b) based on the output signal
Is appropriately moved between the first cleaning position A and the second cleaning position B. That is, when cleaning the long side of the panel P, it is necessary to enter the cleaning nozzle unit 3 from the first cleaning position A into the inner surface of the panel. The drive member 42 is driven at the timing of switching from the side to the long side, that is, at the timing when the other proximity switch 4b is operated, and subsequently at the timing when the one proximity switch 4a is operated, and the cam pivotally supported by the support shaft 40. The plate 41 is rotated to be inclined toward the panel P. Thereby, the slide shaft 39 engaged with the cam groove 45 of the cam plate 41 slides to the panel P side,
Accordingly, the cleaning nozzle unit 3 attached to the nozzle holder 11 advances from the first cleaning position A to the second cleaning position B.

On the other hand, when cleaning the short side of the panel P, the cleaning nozzle unit 3 does not need to enter the inner surface of the panel from the first cleaning position A. The driving member 42 is driven at the timing when the opposing side switches from the long side to the short side, that is, at the timing when one of the proximity switches 4a is continuously operated,
The cam plate 41 is pulled back to an initial state (a state parallel to the seal edge surface S). Thereby, the slide shaft 39 slides in the direction away from the panel P side, and accordingly the cleaning nozzle unit 3 retreats from the second cleaning position B to the first cleaning position A.

During this time, the cleaning nozzle unit 3 moves in parallel with the seal edge surface S in conjunction with the copying operation of the copying unit 2, and accordingly, the slide shaft 39 is moved.
The roller 44 also moves along the cam groove 45 of the cam plate 41. Therefore, in this embodiment, the length of the timing belt 14 is appropriately set so that the rear end of the slide shaft 39 is
The cam plate 41 is rotated by the driving member 42 when the cam plate 41 is positioned coaxially with the center of rotation of the shaft, that is, the support shaft 40. In this way, even when the cleaning nozzle unit 3 is moved between the first cleaning position A and the second cleaning position B, a constant distance is maintained between the inner wall of the skirt portion of the panel P and the cleaning nozzle unit 3. , The splashing of the cleaning liquid due to the nozzle position fluctuation can be reliably prevented.

Thereafter, when the processing for removing the phosphor slurry with the cleaning liquid is completed over the entire periphery of the panel P, the nozzle 3a for supplying the cleaning liquid is retracted from the panel P by driving a cylinder (not shown). Nozzle 3b advances to the panel P side. And this time, nozzle 3
The drying process of the inner wall of the skirt portion is performed with the nozzle trajectory similar to the above by the air jetted from b. Next, the drive plate 3 is driven by driving the air cylinder 37.
8, the cleaning nozzle unit 3 together with the cam plate 41 and the slide shaft 39 is pulled back to a position where the cleaning nozzle unit 3 is retracted from the panel P. Subsequently, the cleaning nozzle unit 3 is pushed down by the driving of the unit expanding air cylinder 26, and the copying unit 2 is separated from the outer peripheral surface of the panel P in conjunction with this. Finally, by driving the air cylinder 32, the entire apparatus retreats from the panel P and returns to the initial state before the start of cleaning. The advance amount of the cleaning nozzle unit 3 from the first cleaning position A to the second cleaning position B can be easily changed by adjusting the drive stroke of the drive member 42.

As described above, in this embodiment, the copying unit 2 performs the copying operation in a state of being pressed against the outer peripheral portion of the panel P which rotates by the panel rotating means (not shown), and the washing nozzle unit 3 interlocks with the copying operation. When the cleaning nozzle unit 3 moves parallel to the seal edge surface S while maintaining a constant distance from the inner wall of the skirt portion of the panel P and cleans the short side of the panel P, the cleaning nozzle unit 3 is moved by the first driving means to the first nozzle. When the cleaning nozzle unit 3 advances to the cleaning position A and cleans the long side of the panel P, the second driving unit moves the cleaning nozzle unit 3 closer to the inner side of the panel than the first cleaning position A. Since the projection proceeds to the position B, the phosphor slurry attached to the inner wall of the skirt portion can be sufficiently removed over the entire periphery of the panel P.

In the above-described conventional device (FIG. 5),
Since the copying roller 83 is pressed against the outer peripheral portion of the panel P only by the urging force of the coil spring 93, when the copying roller 83 reaches the corner of the panel P, the copying roller 83 is momentarily moved by the inertia force. Although a problem such as an accurate copying operation was not performed due to jumping up from the outer peripheral portion of P, in the present embodiment, the urging force of the coil spring 49 disposed above the copying unit 2 is connected with the timing belt 19. Since the copying unit 2 is pressed against the outer peripheral portion of the panel P by the applied pulling force of the weight member 21, it is possible to reliably prevent the copying roller 9 from jumping up at the corner of the panel P.

In the configuration of the above embodiment, a pair of proximity switches 4a and 4b are employed as the sensor 4 for detecting the rotational position of the panel P. However, the present invention is not limited to this. A sensor for detecting the rotational position of the panel may be configured using an optical sensor or the like.
In the present embodiment, the cam groove 45 of the cam plate 41 in the second driving means is formed linearly.
This takes into consideration the ease of processing the cam plate 41. If the cam groove 45 is formed corresponding to the front surface (cylindrical surface) of the panel P, a more optimal nozzle trajectory can be obtained.

[0036]

As described above, according to the present invention,
The second driving unit is driven based on the output signal of the sensor without using an expensive multi-indirect multi-axis robot, and the cleaning nozzle unit that moves in conjunction with the copying unit is moved to the first cleaning position and the first cleaning position. By moving between the cleaning position 2 and the cleaning position 2, the phosphor slurry adhered to the inner wall of the skirt portion can be sufficiently removed over the entire periphery of the panel. As a result, it is possible to effectively remove the phosphor slurry in a shorter time than in the related art, so that improvement in productivity and yield in the panel cleaning step can be expected.

According to the present invention, the cam plate is rotated by the driving member when the rear end of the slide shaft is located at the center of rotation of the cam plate in the second driving means. Is moved between the first cleaning position and the second cleaning position, a constant distance is maintained between the inner wall of the skirt portion of the panel and the cleaning nozzle unit. Splashing of the cleaning liquid can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a panel cleaning apparatus according to the present invention.

FIG. 2 is a view as viewed from an arrow E in FIG. 1;

FIG. 3 is a partially enlarged view of FIG. 1;

FIG. 4 is a view as seen in the direction of arrow F in FIG. 1;

FIG. 5 is a side view showing an example of a conventional panel cleaning apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panel cleaning device 2 Copying unit 3 Cleaning nozzle unit 4 Sensor 37 Air cylinder 38 Drive plate 39 Slide shaft 40 Support shaft 41 Cam plate 42 Drive member 45 Cam groove A First cleaning position B Second cleaning position P Panel S Seal Edge surface

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

Claims (2)

(57) [Claims] 1. An apparatus for cleaning an inner wall of a skirt portion of a panel constituting a cathode ray tube, a copying unit which moves in parallel with a seal edge surface of the panel along an outer peripheral surface of the panel which is rotated by panel rotating means, A cleaning nozzle unit that moves in parallel with the seal edge surface while maintaining a constant distance from the inner wall of the skirt in conjunction with the copying operation of the copying unit; and a step of causing the cleaning nozzle unit to advance to a first cleaning position. A first drive unit, a sensor for detecting a rotational position of the panel, and a first cleaning position and a first cleaning position closer to a panel inner surface than the first cleaning position based on an output signal of the sensor. A second driving unit for moving the panel cleaning device to and from the second cleaning position. 2. The second drive means is provided movably in a direction perpendicular to the seal edge surface, and has a leading end supporting the cleaning nozzle unit, and a rear end of the slide shaft. A cam plate rotatably supported on a support shaft at one end thereof, and a driving member for rotating the cam plate about the support shaft as a center of rotation. 2. The cam plate is rotated by the driving member when a rear end of the slide shaft is positioned at a rotation center of the cam plate in accordance with a copying operation of the copying unit. Panel cleaning equipment.