JPS6114500B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an exposure and printing apparatus for plate making in which a photosensitive plate, which has been coated in advance or is formed into a thick plate shape, and a photographic original plate are brought into close contact with each other by polymerization to perform exposure and printing. It is related to. Conventionally, this type of device generally consists of two upper and lower frames a and b connected by a hinge, as shown in Fig. 1, and the lower plane-holding frame b has a packing part around its periphery. Attach the rubber sheet prepared above, attach a transparent glass or plastic sheet to the upper frame a, place the photographic original plate and photosensitive plate on the rubber sheet, lower the upper frame, and connect the lower frame and the clasp. After joining, the photographic original plate and the photosensitive plate are brought into close contact by sucking air with a vacuum pump P through a hose from a suction port provided in the packing of the rubber sheet, and after exposure is completed at a predetermined time, the vacuum is released. The upper frame is removed to take out the photographic original plate and the photosensitive plate, and it is well known that conventional exposure and printing machines in which the above operations are performed intermittently are known. However, as mentioned above, in this type of printing machine, the vacuum action of a vacuum pump or the like is used to bring the photographic original plate and the photosensitive plate into close contact with each other, which requires time and effort, and requires continuous plate-making work. This method cannot be performed automatically, and therefore has disadvantages such as poor workability.

The present invention has been made in view of the above circumstances, and its purpose is to bring a photographic original plate and a photosensitive plate into close contact with each other reliably and quickly without using a vacuum mechanism such as a vacuum pump as in the past. In addition, it is an object of the present invention to provide a highly efficient plate-making exposure and printing apparatus that can perform plate-making operations continuously and automatically.
The details of the present invention will be explained below with reference to the principle diagram shown in FIG. In the figure, 1 is a curved bed plate having a curved surface portion 11 with a required curve, and 2 is a carry-in guide roller mechanism installed at one end of the curved bed plate. It is composed of rollers 22. 3 is an unloading guide roller mechanism installed at the other end of the curved base plate;
It consists of a tension roller 31 and a rotationally driven main shaft roller 32 provided opposite to the tension roller 31, and 4 is a rotational drive motor that transmits power to the rotationally driven main shaft roller 32 via a belt 5. 6 is a free auxiliary guide roller installed at the apex position of the loading and unloading guide roller mechanism; 7 is a belt conveyor that is stretched over the curved base plate via the auxiliary roller and the loading and unloading guide roller mechanism; The belt runs along the curved bed plate 1 while being kept under tension by a guide roller 22, a rotating main shaft roller 32, and an auxiliary guide roller 6. 8 is a sheet supply roller installed near the curved bed plate;
A transparent belt-like sheet 9 is wrapped around the roller. The band sheet 9 passes between the pressing roller 21 and the guide roller 22, passes over the curved surface of the curved bed plate 1, and passes between the tension roller 31 and the rotary drive main shaft roller 32, and then passes on the other end side of the curved bed plate 1. The sheet is collected by a sheet take-up roller 10 installed at a seat, and when traveling on a curved bed plate 1, it is interlocked with the belt conveyor 7 that slides on the curved bed plate 1. Note that resistance is applied to the pressing roller 21 in the carry-in guide roller mechanism by a necessary means to bring it into a half-brake state, that is, the guide roller 2 facing the roller.
The rollers 31 and 32 in the unloading guide roller mechanism are configured to rotate at the same speed. As a result, extreme tension is created between the tension roller 31 and the pressing roller 21, and the band sheet 9 is integrated with the belt conveyor 7 and remains in close contact with the belt conveyor 7. It runs on the road. 41 is a rotary drive motor that transmits power to the sheet take-up roller 10 via a belt 51; 12 is a printing light source disposed in a required number on the upper part of the curved base plate 1; 13 is a photosensitive plate having photosensitive properties; and 14 is a photograph. The original version is shown.

To carry out the printing operation in the device of the present invention constructed as described above, first, the photosensitive plate 13 and the photographic original plate 14 are stacked on top of the photosensitive plate 13 and inserted onto the curved base plate 1 from between the pressing roller 21 and the guide roller 22. Place it. At this time, since the pressing roller 21 presses the guide roller 22 and brings them into close contact, the photosensitive plate 13 and the photographic original plate 14 are first brought into close contact, and then the belt conveyor 7 and the strip sheet 9 bring them together. After passing the loading guide roller mechanism 2, the belt sheet 9 and the belt are kept in close contact with each other by the tension of the belt sheet 9. A curved base plate 1 is held between conveyors 7
run on top. During this movement, the photosensitive plate 13 is continuously and automatically exposed to light from a required number of printing light sources 12 disposed above the curved base plate 1, and the exposure process is completed. At the same time, the photosensitive plate 13 and the photographic original plate 14 are automatically pushed out from the carry-out guide roller mechanism, that is, between the tension roller 31 and the rotating main shaft roller 32, and the exposure and printing operation is completed.

In this way, the present invention enables the close contact between the photographic original plate and the photosensitive plate, and uses a curved base plate and a band-shaped sheet covering the base plate without using a flat holding plate and vacuum action such as a vacuum pump as in the conventional method. Since it has a simple structure that uses the tension force of It is. Furthermore, in the invention, a carry-in guide roller mechanism is installed at one end of the curved bed plate, and a carry-out guide roller mechanism is installed at the other end, and a belt conveyor is stretched over the curved bed plate via these roller mechanisms and auxiliary guide rollers. Since it is a conveyor system in which the belt is interlocked with the belt sheet, the photographic original plate and the photosensitive plate are simply superimposed and inserted into the carry-in guide roller, and the exposure process is completed. Since the plate-making work can be carried out continuously and automatically, such as by being able to automatically send the plate out from the carry-out guide roller, high efficiency can be achieved and its effectiveness is great.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional exposure and printing machine for plate making, and FIG. 2 is a diagram showing the principle of the exposure and printing apparatus according to the present invention. 1... Curved base plate, 21... Pressing roller,
22... Guide roller, 31... Tension roller, 32... Rotation drive main shaft roller, 4, 41...
...Rotary drive motor, 5, 51...Belt, 6...
...Auxiliary guide roller, 7...Belt conveyor, 8...Sheet supply roller, 9...Band sheet, 10...Sheet winding roller, 12...Printing light source, 13...Photosensitive plate, 14...Photographic original plate .

Claims (1)

[Claims] 1. A curved base plate having a curved surface portion with a required degree of curvature and provided with a carry-in guide roller mechanism on one side and a discharge guide roller mechanism on the other side, an endless belt stretched over the curved base plate, and the endless belt. The endless belt consists of a transparent belt sheet that runs along the curved surface of the curved bed plate in conjunction with the belt, and a required number of printing light sources arranged on the upper part of the curved bed plate, and the endless belt is connected to the guide roller of the carry-in guide roller mechanism. The sheet is wrapped around the curved base plate so as to run on a curved surface while maintaining tension through the rotationally driven main shaft roller and the auxiliary guide roller of the unloading guide roller mechanism, and the belt sheet is attached to the unloading guide roller mechanism that provides resistance. The endless belt is configured to generate a required tension by operating the holding roller and the tension roller of the unloading guide roller mechanism so that the belt runs on the curved surface of the curved base plate in close contact with the endless belt and as one unit. Exposure and printing equipment.