Electric lamp or space discharge component or device manufacturi – Process – With testing or adjusting
Reexamination Certificate
1998-12-30
2001-07-03
Ramsey, Kenneth J. (Department: 2879)
Electric lamp or space discharge component or device manufacturi
Process
With testing or adjusting
C445S063000
Reexamination Certificate
active
06254448
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an automated facility, and more particularly to an apparatus and a method for detecting a start signal in an automated facility, in which an introduction and a position of a pallet which has a cathode ray tube assembly and carried by a conveyor belt can be detected so that a pattern signal is automatically provided to the cathode ray tube assembly to examine and adjust the cathode ray tube assembly.
2. Description of the Prior Art
Generally, an image displaying apparatus displays various observable image signals. The image displaying apparatus including a cathode-ray tube assembly must be examined and adjusted in an automated manufacturing facility in order to display the image signals clearly.
The examination and adjustment are continuously performed for the image displaying apparatus, such as the cathode-ray tube assembly, on a pallet carried by a conveyor belt.
As known well, in a manufacturing line for adjusting the image on the image displaying apparatus, for example the cathode-ray tube assembly by providing signals for examination and adjustment to the image displaying apparatus, the cathode-ray tube assembly is introduced into the manufacturing line while it is disposed on the pallet carried by the conveyor belt. The cathode-ray tube assembly on the pallet is positioned in place to be adjacent to a measuring device. A controller receives an introduction and a position of the cathode-ray tube assembly from a detector and makes a signal a providing device that provides various signals, for examples a horizontal synchronization signal, a vertical synchronization signal, and a data channel displaying signal, from the measuring device to the cathode-ray tube assembly. At this time, a distortion of the image and a scatter of image colors can be generated in the cathode-ray tube assembly.
A worker adjusts the image on the cathode-ray tube assembly and operates a signal providing device to stop the providing of signals for the examination and adjustment from the measuring device to the cathode-ray tube assembly. Then, the pallet having the cathode-ray tube assembly thereon is carried by the conveyor belt to a next working position.
FIG. 1
is a schematic view of an apparatus for detecting a start signal in an automated facility according to the conventional art.
A cathode-ray tube assembly is examined and adjusted relating to image displayed thereon while being carried by a conveyor belt.
A pallet
10
is disposed on the conveyor belt
11
, on which the cathode-ray tube assembly
12
to be examined is disposed. When the conveyor belt
11
is driven, the pallet
10
having the cathode-ray tube assembly
12
disposed thereon is carried by the conveyor belt
11
.
When the pallet
10
reaches a position at which a signal providing device is mounted beside the conveyor belt, as shown in
FIG. 1
, the pallet
10
passes a first stopper
15
disposed between guide rails for guiding the conveyor belt and is stopped by a second stopper
16
spaced at a predetermined distance from the first stopper
15
.
As shown in
FIGS. 1 and 2
, the first and second stoppers
15
and
16
are raised by a controller
14
. While the pallet
10
is carried to an examination area in which the signal providing device is disposed, the pallet
10
comes in contact with a first limit switch
17
mounted on one of the guide rails guiding the conveyor belt
11
to be projected upward. When the pallet
10
is contacted with the first limit switch
17
, the first limit switch
17
is turned on by the pallet
10
to transfer a signal for notifying an introduction of the cathode-ray tube assembly to the controller
14
.
When the introduction signal is transferred from the first limit switch
17
to the controller
14
, the controller
14
generates a control signal P
1
to control a first solenoid valve
19
.
The first solenoid valve
19
shuts off air supplied through a pneumatic hose
20
to the first stopper
15
and discharges air through a distributor
21
from the first stopper
15
so that the first stopper
15
spaced from the first limit switch
17
at a predetermined distance is lowered for about 0.3 second.
The pallet
10
carried by the conveyor belt
11
passes the first stopper
15
within 0.3 second and comes in contact with a second limit switch
18
mounted on one of the guide rails for guiding the conveyor belt
11
to be projected upward while being stopped by the second stopper
16
disposed at a position between the guide rails.
Then, the controller
14
controls the first solenoid valve
19
to supply the air which is provided through the pneumatic hose
20
to the first stopper
15
through the first solenoid valve
19
and the distributor
21
. Accordingly, the first stopper
15
is raised by air pressure again.
The second limit switch
18
spaced at a predetermined distance from the first stopper
15
is turned on when being in contact with the pallet
10
and transfers a signal with respect to a position of the pallet
10
to the controller
14
.
When the controller
14
receives the position signal from the second limit switch
18
, the signal providing device provides a signal for examination and adjustment to the cathode-ray tube assembly
12
on the pallet
10
carried by the conveyor belt
11
.
When the pallet
10
is stopped by the second stopper
16
and the second limit switch
18
detects the position of the pallet
10
, the controller
14
generates a control signal P
3
to control the third solenoid valve
23
.
The third solenoid valve
23
provides the air supplied through the pneumatic hose
24
to a securing device
22
secured to the frame of the conveyor belt
11
according to the control of the controller
14
.
The security device
22
forces the pallet
10
to be close to the worker by the air pressure of the air supplied from the third solenoid valve
23
and secures to hold the pallet
10
stable.
Then, the controller
14
generates a control signal P
2
to control the second solenoid valve
25
when the pallet
10
is stably secured to the main frame.
The second solenoid valve
25
provides a pressure generator
27
of the signal supplying device such as a cylinder mounted on the main frame with pneumatic pressure through the pneumatic hose
24
according to the control of the controller
14
.
The pressure generator
27
generates the pressure using the air introduced from the second solenoid valve
25
to move and connect a movable connector
28
of the signal supplying device associated with the pressure generator
27
to a secured connector
29
mounted on the pallet
10
.
Thus, the pattern signals for examination and adjustment that are generated by the measuring device
13
are transferred to a printed circuit board assembly
31
of the cathode-ray tube assembly
12
through a connection cable
30
, the movable connector
28
, the secured connector
29
, and a signal cable
33
and displayed on the cathode-ray tube
32
. Accordingly, the worker can identify and adjust the pattern displayed on the cathode-ray tube
32
.
When the examination and adjustment for the cathode-ray tube
32
are completed and the worker pushes a stop switch (not shown), the controller
14
controls the second solenoid-valve
25
to make the pressure generator
27
move backward. When the pressure generator
27
is moved backward, the movable connector
28
associated with the pressure generator is moved backward to be disconnected from the secured connector
29
. In addition, the controller
14
controls the third solenoid valve
23
so that the secured device
22
is moved back.
On the other hand, the controller
14
controls the first solenoid valve
19
to make the second stopper
16
to be lowered for a predetermined time, for example 0.3 second, so that the pallet
10
having the cathode ray tube assembly
12
is transferred by the conveyor belt
11
as soon as the stop switch is pushed. After 0.3 second, the controller
14
controls the first solenoid valve
19
and the distributor
21
to make
Bushnell , Esq. Robert E.
Hopper Todd Reed
Ramsey Kenneth J.
Samsung Electronics Co,. Ltd.
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