JPS5846415Y2 - Device that brings the printing plate and film into close contact - Google Patents

Description

[Detailed Description of the Invention] 1 Technical Field of the Invention The present invention relates to a contact device that brings a film into close contact with a printing plate when photoengraving the printing plate.

2. Prior Art Conventionally, when a film is brought into close contact with a printing plate, the air between the printing plate and the film is removed by placing the film on the top surface of the printing plate and pressing the top surface of the film with the force of a line contact using a roller or the like. The method used was to allow the liquid to escape to the outside and bring the two into close contact with each other.

Problems with the conventional technology In the method of pressing with a roller, etc., if there is dust on the film due to line contact, the roller will float and the air in that area will not escape to the outside, resulting in the film not being completely pressed against the printing plate. A problem arises in which it is not possible to make them stick closely together.

Furthermore, if a strong force is applied to the film, it may shift relative to the printing plate, which not only impairs the registration accuracy due to so-called unevenness of the film, but also promotes the generation of static electricity, which makes it easier for dust to adhere.

4. Purpose of the invention The purpose of the invention is to provide a close contact device that can completely bring a film into close contact with a printing plate without applying strong force to the film.

5. Structure of the Invention The structure of the present invention is, for the above-mentioned purpose, to include a base on which a printing plate is placed, and a holding means for holding one edge of the film that is tightly attached to the top surface of the printing plate at one end of the base. a brush provided above the base over substantially the entire width of the printing plate to bring the film into close contact with the printing plate; and this brush and the base C.
- It is characterized by comprising a driving means for moving either one in parallel to the other.

In short, the pressure applied to the film surface by the brush is point contact, so even if there is dust or foreign matter on the film surface, other surfaces will not interfere with each other and will be pressed independently.
This allows the film to be brought into perfect contact with the printing plate without applying strong force to the film surface.

5. Embodiment of the invention FIG. 1 is a sectional view showing an embodiment of the invention, and FIG. 2 is an enlarged view of the main parts thereof.

In the figure, 1 is a housing, and the upper part of the front plate thereof is constituted by a door 3 that can be opened and closed in the vertical direction by a hinge 2.

In the housing 1, a base 4 is provided at approximately the center of the front plate so as to be movable inwardly and outwardly via a support frame 5.

A mounting plate I for mounting the printing plate 6 on the upper surface is fixed to the base 4, and a holding means 8 and a cylinder 9 for removing the printing plate 6 from the above-mentioned mounting plate 7 are provided at the front. It is provided.

A plurality of air intake ports 11 branched from an air intake groove 10 connected to a vacuum pump (not shown) or the like are arranged on substantially the entire surface of the mounting board I.

In addition, the holding means 8 is attached to a cylinder 8a provided on the base 4 and to the tip of a piston rod of the cylinder 8a, and the front edge of the film 12 is held on the mounting plate I by the operation of the cylinder 8a. Locking tool 8 held on the top surface
It is composed of b.

Further, above the base 4, a roller 13 is provided that presses the printing plate 6 onto the mounting plate γ.

Further, inside the housing 1, a light source storage case 14 for irradiating light from a light source downward is provided in the upper part, cylinders 15 and 16 are provided in the lower front and rear positions, and cylinders 15 and 16 are provided in the upper front and rear positions and in the center. A shaft 17a is located at the front and rear positions of the
17b.

Sprocket 18a via 17c, 17d, 17e,
18b, 18c, 18d, and 18e are provided, respectively.

Suburoketsu N8b. An endless chain 19 is wound around 18d, 1zc, and 18e in an abbreviated shape.

The chain 19 has a vertical portion 19a between the sprockets 18b and 18e connected to the tip of the piston rond of the cylinder 16 via a connector 20, and the sprocket 18c.

The base 4 is attached to the horizontal portion 19b between the connector 2 and the connector 18e.
1.

Further, an endless chain 22 is wound between the sprocket 18a and a sprocket (not shown) provided on the shaft 17c of the sprocket 18c.

The chain 22 is connected to a vacuum pump (not shown) or the like at a front portion 22a which is rotated downward in the figure when the horizontal portion 19b is rotated leftward in FIG. 1 by the operation of the cylinder 16. A suction port 23 for suctioning the rear edge of the film 12 is provided.

Furthermore, at the tip of the piston rod of the cylinder 15,
A static electricity removal brush 24 that presses and presses the surface of the film 12 stacked on the upper surface of the printing plate 6 is provided over substantially the entire width of the mounting plate I.

Next, the operation of this embodiment will be explained.

1. First, open the door 3 and place the printing plate 6 on the mounting plate 7 of the base 4 with the photosensitive surface facing upward.

Subsequently, the front edge of the film 12 is held by the locking tool 8 of the holding means 8.
After inserting the cylinder 8a into the gap between the cylinder 8a and the mounting plate 7, the cylinder 8a is activated.

Then, the locking tool 8b is lowered, and the front edge of the film 12 is held between the locking tool 8b and the mounting plate 7.

At this time, the trailing edge of the film 12 passes above the roller 13 and is placed on the printing plate 6.

Thereafter, the cylinder 15 is operated to lower the brush 24, and the cylinder 16 is operated to rotate the chain 19 clockwise in the figure.

Then, along with the chain 19, the horizontal part 19
As e rotates to the left in the figure, the base 4 is moved in the same direction.

At the same time, since the chain 22 is also rotated counterclockwise due to the rotation of the shaft 17c, the suction port 23 is gradually lowered.

Here, as the base 4 moves, the film 12 is gradually stacked on the upper surface of the printing plate 6.

Now, when the film 12 overlapped with the printing plate 6 passes through the brush 24, the air between the printing plate 6 and the film 12 is routed to the outside by the action of the brush 24, and the film 12 is transferred to the printing plate 6. Closely attached to.

At this time, even if dust or the like is attached to the printing plate 6''i! or the film 12, the bristles of the brush 24 are independent, so the air between them can be evenly released to the outside. .

Further, since the brush 24 is a static electricity removal brush, static electricity caused by friction is removed, and dust is prevented from adhering to the brush 24.

Thereafter, the printing plate 6 and the film 12, which have passed through the position of the brush 24 and have come into close contact with each other, are stopped when they come directly under the light source storage case 14.

At this point, the suction port 23 suctions the rear edge of the film 12, and printing is performed by irradiation with light from the light source storage case 14.

After the work is completed, the brush 24 is raised by the actuation of the cylinder 15, and then the cylinder 16 is actuated in the opposite direction, causing the chain 19 to rotate counterclockwise in the figure.

Then, as the base 4 is moved to the right in the figure, the trailing edge of the film 12 is lifted while being attracted to the suction opening 23, so that the film 12 is peeled off from the printing plate 6.

Then, when the base 4 is at the initial position, the cylinder 9 is actuated, and the printing plate 6 floats up from the mounting plate I, so that the printing plate 6 can be easily removed.

Therefore, when continuing to make multiple printing plates 6,
It is only necessary to sequentially mount and remove the printing plates 6 onto and from the mounting plate 7.

This is because the films 12 are automatically overlapped and peeled off as the printing plate 6 moves.

Note that although the above embodiment deals with the close contact between the printing plate 6 and the film 12, the same effect can be expected even when the cover film is brought into close contact with the upper surface of the film 12.

Alternatively, if the upper edge of the film 12 is not fixed and is simply biased diagonally upward, the base 4 is fixed and the brush 24
A similar effect can be expected if the structure is such that it can be moved along the base 4.

6 Effects of the invention According to the invention, a brush is provided above the base on which the printing plate is placed to bring the film into close contact with the top surface of the printing plate, and one of the brush and the base is parallel to the other. Since the air between the printing plate and the film is moved to the outside by the action of the brush, the air between the printing plate and the film can be released to the outside and the two can be brought into close contact with each other. Even if the printing plate and film are in close contact with each other evenly, the printing plate and the film do not need to be lifted up unlike the conventional roller type, and the force applied to the film does not have to be very strong, making it suitable for multicolor printing. When making printing plates, it is possible to improve registration accuracy by reducing misalignment between the film and the printing plate.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the main parts thereof. 4... Base, 6... Printing plate, 8...
...Holding means, 16...Cylinder as driving means, 24...Bufushi○

Claims (1)

[Claims for Utility Model Registration] 1. A base on which a printing plate is placed, a holding means for holding one end edge of a film to be superimposed on the upper surface of the printing plate at one end of the base, and a A brush provided over substantially the entire width of the printing plate for bringing the film into close contact with the printing plate, and a driving means for moving either the brush or the base parallel to the other. A device that brings the printing plate and film into close contact. 2. The device for bringing a printing plate and a film into close contact with each other according to claim 1, wherein the brush is a static electricity removal brush.