JPH0245863Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an apparatus for automatically developing a PS plate for offset printing.

(Prior art and its problems) Conventionally, automatic developing devices for PS plates have been equipped with a developing zone, a washing zone, a gumming zone, and a drying zone along the transport line of the PS plate. In the device, the position to insert the PS plate and the position to take out the developed PS plate are located on opposite sides of each other, so it is necessary to insert the PS plate when developing the PS plate and loading it onto the printing drum. After that, it was necessary to go to the take-out position and take out the PS plate, which caused the problem of poor workability.

Therefore, an object of the present invention is to provide an automatic developing device for a PS plate in which the insertion position and the removal position of the PS plate are located close to each other on the same side.

(Means for Solving the Problems) For this reason, the present invention provides a continuous, approximately horizontal transfer line in the insertion part of the PS plate, and along this transfer line, a developing zone where the developer is injected, and a washing water are provided. A washing zone for spraying water, a gumming zone for applying water-soluble rubber liquid, and a drying zone for drying with hot air are installed side by side.
A conveyor for PS plates, comprising a conveyor provided with a movable pedestal for receiving PS plates discharged from the transfer line, extending between a diagonally downward position in the extension direction of the transfer line and a lower position of the insertion section. Provides automatic developing equipment.

(Function) According to this automatic developing device for PS plates, when a PS plate is inserted from the insertion section, it is developed, washed with water, gummed, and dried while moving along the transfer line, and then discharged from the end of the transfer line. be done. The ejected developed PS plate falls naturally and is received as is on the moving pedestal of the conveyor. The conveyor then operates and its movable cradle moves to the lower position of the insertion section, from which the PS plate can be taken out.
In addition, the method of returning the developed PS plate to the vicinity of the insertion section is to wrap it around a drum at the end of the transfer line and turn it over, as is applied in copying machines, etc.
Another option is to transport it to the vicinity of the insertion site, but
Bending the PS plate with a small radius of curvature will have a negative effect on the printing surface, so a large diameter drum is required, and it is also necessary to prevent the PS plate from being scratched on the drum surface. It is large and expensive. In this respect, in the automatic developing device of the present invention, the PS plate is not bent other than the natural bending when it falls naturally, and moreover, it can be constructed compactly and inexpensively.

(Example) Next, an example of the present invention will be described based on the drawings. Reference numeral 1 denotes a PS plate insertion section provided on one side of the upper part of the apparatus, and a limit switch 2 for detecting insertion of the PS plate is provided. A PS plate transfer line 3 is provided horizontally straight from this insertion section 1 toward the other side. This transfer line 3 has rotatably driven guide rolls 4 made of rubber rolls that support and move the PS plate arranged at appropriate intervals, and also
It consists of a presser roll 5 that clamps the PS plate.
This transfer line 3 is divided into four zones in the casing, namely a development zone 7, a washing zone 8, a gumming zone 9 and a drying zone 10.
In the development zone 7, there are a pair of upper and lower injection nozzles 11a that spray developer onto both the upper and lower images of the moving PS plate.
11b are arranged in plural pairs. These injection nozzles 11a and 11b are configured to be supplied with developer by a pump 13 from a developer tank 12 located at the lower part of one side of the device, and the developer is supplied to the developer tank 12 at a constant rate. A heater 14 is provided with a temperature detector 14a to maintain the temperature. The washing zone 8 includes a pair of upper and lower injection nozzles 15a, 15 that spray washing water onto both the upper and lower surfaces of the moving PS plate.
b, and is configured such that washing water is supplied by a pump 17 from a washing water tank 16 arranged parallel to the developer tank 12. Gum pulling zone 9
A pair of coating rolls 18 and 19, one of which is a driving roll, are arranged to transfer the PS plate under pressure in the same manner as the guide rolls 4 and 5, and a water-soluble rubber liquid is applied to the upper coating roll 19. A supply nozzle 20 and a roll 21 for uniformly spreading the supplied water-soluble rubber liquid are attached, and the lower part of the lower coating roll 20 is immersed in the water-soluble rubber liquid accumulated at the bottom of this gumming zone 9. ing. The nozzle 20 is configured to be supplied with a water-soluble rubber liquid by a pump 23 from a gum liquid tank 22 disposed at the bottom. The drying zone 10 is provided with a pair of upper and lower nozzles 24a and 24b that blow hot air onto both the upper and lower surfaces of the moving PS plate.
The nozzle is configured to supply hot air to this nozzle from a hot air generator 25 placed at the top on the other side of the device. The hot air generator 25 is equipped with a heater 27 at the outlet of a blower 26, and the heater 27 is configured to operate only when the blower 26 is in operation. Further, the suction port of the blower 26 is connected to the inside of the drying zone 10 to circulate hot air. Reference numeral 28 denotes a drive motor disposed at the end of the transfer line 3, which drives the guide roll 4 and coating roll 1.
8 are interlocked and connected in a well-known manner so as to rotate and drive them, and a variable speed motor is used so that the moving speed of the PS plate can be varied. Reference numeral 30 denotes a conveyor disposed between a diagonally lower position in the extension direction of the distal end of the transfer line 3, that is, a lower part on the other side of the apparatus, and a lower part of the insertion part 1, that is, an intermediate upper part on one side of the apparatus. It is equipped with a movable pedestal 31 for receiving the PS plate, and is configured to move this movable pedestal 31 back and forth. Furthermore, when the limit switch 2 is turned on, the conveyor 30 always returns to the moving end on the distal side of the transfer line 3, and after a predetermined period of time has elapsed after the limit switch 2 is turned on, it moves toward the moving end on the insertion section 1 side. It is structured like this. 3
2 is a drive motor for the conveyor 30, and a variable speed motor is used. Further, reference numeral 29 denotes a guide plate disposed behind the end of the transfer line 3, which guides the PS plate discharged from the transfer line 3 so that it does not jump over the movable pedestal 31.

Next, the operation will be described. When the power switch is turned on, the guide roll drive motor 28, the water-soluble rubber liquid supply pump 23, and the hot air generator 25 are activated. Next, insert the PS plate to be developed into the insertion section 1.
When inserted from above, limit switch 2 will operate,
The pump 13 for supplying developer solution and the pump 17 for supplying washing water are operated. While the inserted PS plate moves along the transfer line 3, it is sprayed with a developer in the development zone 7 to remove excess sensitizer, and then washed with washing water in the washing zone 8. Next, in the gumming zone 9, a water-soluble rubber liquid is applied using coating rolls 18, 19 to protect the printed surface, and finally, in the drying zone 10, hot air is blown to dry it. The PS plate that has been developed in this way is discharged from the end of the transfer line 3,
It naturally falls as shown by the arrow in the figure and is received on the movable pedestal 31 of the conveyor 30. During this time, the PS plate is transported at a speed of approximately 1 to 3 m/min, and
It is placed on the movable pedestal 31 in 180 seconds. On the other hand, when the limit switch 2 is activated, the timer is activated, and after a predetermined period of 60 to 180 seconds has elapsed, the drive motor 32 of the conveyor 30 is activated, and the movable pedestal 31 of the conveyor 30 is moved to the lower position of the insertion section 1. . In this way, the developed PS plate can be taken out at a position below the insertion section 1.

Note that the movable pedestal 31 of the conveyor 30 is
If you accidentally insert the PS plate before it reaches the bottom of the transfer line 3 or when it is in the middle of the transfer line 3, the movable pedestal 31 will move to the end side of the transfer line 3 by operating the limit switch 2. Upon returning to , the timer is reset and the device waits until the next PS version is received on the movable cradle 31, after which it moves.

(Effect of the invention) As is clear from the above explanation, the automatic developing device for PS plates of the invention is located diagonally downward in the extending direction of the transfer line in which the developing zone, washing zone, gumming zone, and drying zone are arranged side by side. A conveyor equipped with a movable receiving stand that receives the PS plates discharged from the transfer line is installed between the The PS plate can be inserted and removed at the same location, improving work efficiency compared to conventional methods. Moreover, during the transfer, PS
Since the plate is not bent with a small radius of curvature, there is no risk of adversely affecting the printing surface, and since it is only necessary to provide a flat conveyor, it can be configured compactly, which has great practical effects.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional front view showing a schematic configuration of an embodiment of the present invention. 1... Insertion section, 3... Transfer line, 7... Development zone, 8... Washing zone, 9... Gumming zone, 10... Drying zone, 30... Conveyor, 3
1...Movable cradle.

Claims (1)

[Scope of utility model registration request] A substantially horizontal transfer line is provided continuously in the insertion part of the PS plate, and along this transfer line there is a development zone in which a developer is sprayed, a washing zone in which washing water is sprayed, a gumming zone in which a water-soluble rubber liquid is applied, and A drying zone for drying hot air is provided in parallel, and the air discharged from the transfer line extends between a diagonally downward position in the extending direction of the transfer line and a lower position of the insertion section.
An automatic developing device for PS plates, characterized by being equipped with a conveyor equipped with a movable pedestal for receiving PS plates.