JPS6127850B2 - - Google Patents

Description

[Detailed description of the invention]

In coating the inner surface of a color cathode ray tube panel with black light-absorbing stripes and blue, green, and red phosphor stripes, the present invention involves the step of exposing and forming a photoresist film of a predetermined shape on the inner surface of the panel. The present invention relates to a device for transferring cathode ray tube panels to a group of exposure stands. For example, black stripe coating is
A photosensitive agent is applied to the inner surface of the panel, a shadow mask is fitted inside the panel, and the photosensitive surface of the panel is exposed to light through this shadow mask to form a photoresist film in a predetermined shape on the inner surface of the panel. A black light-absorbing material is applied, and only a portion of this material that covers the photoresist film is removed together with the film, so that the remaining black light-absorbing material forms a black stripe on the inner surface of the panel. The coating of the phosphor stripes is also carried out in substantially the same manner. Conventionally, in coating such black stripes or phosphor stripes, when exposing the photosensitive surface of the panel, the work of taking the panel out of the transport conveyor, placing it on the exposure stage, and returning it from the exposure stage to the transport conveyor is as follows: It was dependent on manpower. One of the reasons that hindered mechanization was that multiple types of cathode ray tube panels flowed through a single production line, making the processing equipment complex.
For example, the installation space for the equipment is limited. The present invention aims to improve these points, and has a relatively simple structure, can efficiently process panels of multiple tube types, and can transfer cathode ray tube panels to a group of exposure stands without taking up much installation space. The aim is to provide equipment. Next, one embodiment of the present invention will be described in FIGS. 1 to 3.
This will be explained based on the diagram. 1 is a cathode ray tube panel P whose inner surface is coated with a photosensitizer and a shadow mask is fitted inside.
This is a conveyor that transports. At the left end of the conveyor 1 in Figure 1 is the panel P.
Loading position 2 for feeding onto conveyor 1
However, there is also an unloading position 3 at the right end of the conveyor 1 in FIG.
are determined respectively. Further, terminal positions 4, 5, 6, and 7 are determined so as to divide the space between the loading position 2 and the unloading position 3 into five equal parts. The conveyor 1 is, for example, a pair of endless rotating chains with a panel storage pallet (not shown) attached thereto, and the pallet is provided with a loading section 8 and an unloading section 9. The conveyor 1 is driven intermittently so that the pallets are stopped at the loading position 2, the terminal positions 4, 5, 6, 7, and the unloading position 3, respectively. Further, a pair of left and right rails 11 are provided above the conveyor 1 before and after each of the terminal positions 4, 5, 6, and 7, and a panel transfer device 12 is provided on each pair of rails 11. This transfer machine 12 has a base body 14 movably mounted between the rails 11 via rollers 13 that roll in contact with the upper and lower surfaces of the rails 11 on both sides, and a rotating shaft on the underside of the base body 14. A base plate 16 is provided through the base plate 15, and two sets of support rods 17, which are moved forward and backward by an air cylinder (not shown) or the like, are provided on the lower side of the base plate 16 facing opposite sides. A transfer head 2 such as a suction cup that holds the panel P by suction is attached to the lower end of the piston rod 20 of each air cylinder 19.
1 is attached. In addition, the rail 11 of each panel transfer machine 12 mentioned above
Exposure zones E, F, G, and S are provided along the conveyor 1 so as to substantially coincide with . For example, if there are four types of cathode ray tubes assembled on this production line, each of these exposure zones E, F, G, and S has four exposure stands a, b, c, and d corresponding to the four types.
are provided respectively. Further, among the exposure zones E, F, and G are those that are always used, and S is a spare zone that is used in place of the exposure table in zones E, F, and G when they are out of order or undergo a check. . Then, for example, the panel transfer machine 12 in zone F
When the panel P to be exposed in zone F comes to the terminal position 5, the panel P is picked up from the loading section 8 of the conveyor 1 by one transfer head 21 and held at the other transfer head 21 at the same time. The exposed panel P that has been exposed is placed on the unloading section 9 of the conveyor 1, and then the panel P picked up by one of the transfer heads 21 is placed on a predetermined exposure stand C according to the tube type of the panel P. position along the rail 11, then take out the exposed panel P from the exposure table C using the other empty transfer head 21, and then transfer the exposed panel P to the exposure table C using the one transfer head 21. 21 panel P is placed on it, and then it returns to terminal position 5 and waits for the next delivery time. Here, the working capacity of the panel transfer machine 12 has a time limit. For example, if each time period during which a panel is conveyed from position 2 to position 4, from position 4 to position 5, or from position 7 to position 3 is defined as one cycle, the panel transfer machine 12 performs each cycle as described above. The time k ₁ required to start the operation from the terminal position and return to the original terminal position is, for example, a maximum of three cycles. In this way, three panel transfer machines 12 are required in order to pick up all the panels P that are intermittently transported in each cycle by the panel transfer machines 12 that operate in one cycle with a maximum of three cycles. . This is the meaning of providing three constantly used exposure zones E, F, and G and three transfer machines 12 corresponding to these in this embodiment. Further, the time _k2 required for exposure including the margin time is, for example, 12 cycles. In this embodiment, one panel P is supplied to each zone E, F, G, and S in a maximum of 3 cycles, so 4 panels are supplied inside each zone.
The above 12 cycles can be ensured by sequentially supplying the panels P to each of the exposure tables a, b, c, and d. At this time, four types of panels P are supplied to the conveyor 1 in a circular manner, and the same type is not continuously supplied. Furthermore, even if panels P of different tube types with different net exposure times are supplied, and even if the zones in which the panels P are processed are different, the panels P will be delivered in the order in which they are supplied to the loading position 2 of the conveyor 1. It is taken out from unloading position 3. This will be explained based on FIG. In the figure, each panel P is from the loading position 2 of the conveyor 1 to each terminal position 4, 5, 6, 7.
The time required for the conveyor to reach x is taken up from the conveyor 1 at each terminal position 4, 5, 6, and 7, and then returned to the original terminal position 4, 5, 6, and 7 through exposure processing.
5, 6, and 7 until it is placed on the conveyor 1 is k, and the time from being returned to the conveyor 1 to being transported to the unloading position 3 of the conveyor 1 is y. Also, u is the net portion required for exposure, and v is the margin. By adjusting the margin time, even if the net time required for exposure differs depending on the tube type, panel P can be The total time stored inside b, c, d is constant in cycle k ₂ as stated earlier. Therefore, the above-mentioned time k=3 cycles k ₁ +12 cycles k ₂ =15 cycles and is constant. Furthermore, if the above times x, y and (x+k+y) are tabulated, it becomes as follows, and since the time (x+k+y) = 20 cycles (constant), the panels P are taken out from the conveyor 1 in the order in which they were supplied to the conveyor 1. It can be done.

[Table] In this example, the exposure zone was divided into 4 zones due to the time required for moving the panel transfer machine 12 or the panel transport conveyor 1, but if the performance improves, the exposure zone may be divided into 3 zones or 2 zones. In that case, costs can also be reduced. According to the present invention, a plurality of exposure zones are provided along a conveyor, a panel transfer device is provided correspondingly to each zone, and a plurality of exposure tables in each zone are exposed by each transfer device. Since the panels are transferred one after another, the moving speed, adsorption, and unloading speed of conventional panel transfer machines can be easily applied to the system. A device for transferring panels to a group of exposure stands that can process panels efficiently can be obtained. Furthermore, if the time required for transfer of each panel transfer machine and the time required for exposure of each exposure stand are set constant, a certain panel can be picked up from the conveyor by the transfer machine and then returned to the conveyor again. The time it takes for each panel to be unloaded on the conveyor from the time it is fed to the panel loading position on the conveyor to the time it is taken out at the panel unloading position can be made constant; can be taken out from the conveyor in the order in which they were supplied to the conveyor, and therefore panels of many types of tubes can be automatically exposed on one production line. Each panel transfer machine of the present invention also includes one transfer head that transfers panels from a loading section on the conveyor to the exposure table, and a transfer head that transfers panels from the exposure table to an unloading section on the conveyor that has already been exposed. Since it has the other transfer head for transferring panels, panel loading by one transfer head and panel unloading by the other transfer head can be performed simultaneously on the conveyor, resulting in high work efficiency. Further, since the one and the other transfer heads are provided so as to be movable along the exposure zone and between the conveyor and the exposure table, arbitrary exposure can be achieved by movement along the exposure zone. A platform can be directly selected and panels can be quickly unloaded and loaded onto any exposure platform.

[Brief explanation of the drawing]

The figures show an embodiment of the apparatus for transferring cathode ray tube panels to an exposure table group according to the present invention. FIG. 1 is an overall plan view, FIG. 2 is a plan view of the main part, and FIG. 3 is a plan view of the main part. The side view and FIG. 4 are explanatory diagrams of the operation. P...Panel, 1...Conveyor, 2...Panel loading position, 3...Panel loading position, 8...Loading section, 9...Unloading section, 12...Panel transfer machine, n ₂ ...Transfer head, E, F, G, S...Exposure zone, a, b,
c, d...Exposure table.

Claims (1)

[Claims] 1 A conveyor that transports cathode ray tube panels whose inner surfaces are coated with a photosensitizer and a shadow mask is fitted inside, and multiple panel transfer machines installed between the panel loading and unloading positions of this conveyor. , a plurality of exposure zones installed along the conveyor corresponding to each of the panel transfer machines, and a plurality of exposure tables provided in each of the exposure zones, and each of the panel transfer machines One transfer head transfers the panel from the upper loading section to the exposure table, and the other transfer head transfers the exposed panel from the exposure table to the unloading section on the conveyor. , wherein the one and the other transfer heads are provided movably along the exposure zone and between the conveyor and the exposure table. loading equipment.