JPS6015157A - Water supply mechanism of printer - Google Patents

Abstract

PURPOSE:To supply water in a water tank onto a plate cylinder surface evenly and properly by a method wherein a peripheral speed of a damping roller and a peripheral speed of the plate cylinder are same and a peripheral speed of a crome roller and the peripheral speed of the plate cylinder are different. CONSTITUTION:A sliding clutch is applied to a gear 24 for a damping roller 23 and the gear 24 is coupled with the damping roller 23 and a crome roller 22 to make their peripheral speeds different from each other to produce slipping phenomenon between contact surfaces of the two rollers. A plate cylinder 21 is rotated at the same peripheral speed as the damping roller 23 so that water is supplied evenly onto the plate surface and the quantity of an ink adhering to the plate surface is also uniform. With this constitution, the apparatus is simplified and the compact unit structure can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply device for a printing press, and more particularly to a water supply mechanism that continuously supplies a constant amount of water in a water tank to the plate cylinder surface.

The water supply mechanism of printing presses, which has been widely used in the past, collects water that adheres to the outer surface of a water base roller that is partially immersed in a water tank.
A common method has been to use transfer rollers that are brought into contact with each other alternately and swing rollers that are reciprocated from side to side to cause a swim roller to wet the cloth and supply it to the plate cylinder surface. Recently, this traditional method does not provide good water supply.

A draining loam roller that rotates in a water tank and a chrome roller that rotates in the opposite direction to the water base roller are placed in contact with each water base roller, and water is further supplied to the plate cylinder surface through a swimsuit roller that rotates in the same direction as the chrome roller. Water supply mechanism (Patent application No. 184486/1986, Patent application No. 150530/1983)
No.) was developed.

However, in all of these water supply mechanisms, the water source roller and chrome roller rotate in the opposite direction (both rollers rotate in opposite directions).
As a result, the supply water adhering to the outer circumferential surface of the water base roller is stored on the contact surface with the chrome roller, and at the same time is stirred up in a spiral, adhering to the bathing roller and being supplied to the printing plate. . As a result, the amount of ink deposited is not uniform, resulting in a rain phenomenon on the printed matter, making it impossible to print well.

The present invention was developed in order to solve the above-mentioned drawbacks, and the present invention has been developed in order to solve the above-mentioned drawbacks. A draining loam roller that rotates in a direction and a chrome roller that rotates in the opposite direction to the water base roller are placed in contact with the water base roller, and water is supplied to the plate cylinder surface through a swimsuit roller that rotates in the same direction as the chrome roller. In the water supply mechanism, the circumferential speed of the swimsuit roller and the circumferential speed of the plate cylinder are made the same,
Moreover, by setting the circumferential speed of the chrome roller and the circumferential speed of the plate cylinder to be different circumferential speeds, the water supply mechanism aims to supply water in the water tank evenly and satisfactorily to the surface of the plate cylinder. This is what we provide.

An embodiment of the present invention will be described below with reference to two drawings.

FIG. 1 shows the principle mechanism of a water supply device in a conventional printing press and its problems. ] is an aquarium that is always filled with water for water supply. 3 is a water base roller, and 9 has a surface coated with a synthetic resin material such as rubber. The reason why the surface of the water base roller is made of rubber is to allow the water 2 in the water tank 1 to be well supplied to the outer peripheral surface 4 of the water base roller 3, and to supply a certain amount of water 5 from 5A to 5E.
This is because it was provided to provide stable supply to 50.5D.

As shown in the figure, this water base roller 3 is installed so that a part of its outer peripheral surface 4 is immersed in the water 2 in the water tank 1.
It is designed to be rotated by a separate motor (not shown). Reference numeral 6 denotes a draining loam roller, which is mounted so as to rotate in the same direction as the drain roller 3. The draining loam roller 6 is a water amount adjusting roller that automatically drains a large amount of supplied water 5 supplied to the outer circumferential surface 4 of the water base roller 3. By this rotation of the draining chrome roller 6, the supply water 5 of the water source roller 3 is sequentially and stably supplied by reducing the supply amount of 5A and automatically adjusting to the supply amount of 5E. 7 is a chrome roller,
It is installed by connecting it between the water base roller 3 and the swimsuit roller 8. The chrome roller 7 is designed to rotate in the same direction as the swimwear roller 8, but is designed to rotate in the opposite direction to the swimsuit roller 3. The reason why the chrome roller 7 is rotated in the opposite direction to the water head roller 3 in this manner is that the swim roller 8, which rotates in the opposite direction to the water head roller 3 (this roller is rotated in the opposite direction to the plate cylinder 9), Supply water 5B through 5
In order to stably supply the water in the 0.5D state, 1. In other words, the water roller 3 rotates in the direction of the arrow. Since it is rotating, the supply water 5B of the water head roller 3 is reversed by the supply water 5C at the chrome roller 7, and is supplied to the swimsuit 1J-ra 8 in an S-shaped state 5D. The outer circumferential surface of the swimsuit roller 8 is coated with a synthetic resin material such as rubber, similar to the outer circumferential surface of the swimsuit roller 3. Reference numeral 9 denotes a plate cylinder having a plate surface 10, and further provided with a tooth 11 and a buttock 12. This plate cylinder 5-9 is rotated in the direction of the arrow and is interlocked with the swimsuit roller 8. By interlocking with this swimsuit roller 8, the supply water 5
A constant amount of D is continuously supplied to the printing plate 10.

13 is a plate vise, which is the part other than the first plate side. In the conventional mechanism configured in this way, when the swimsuit roller 8 is in continuous contact with the plate surface 10, the waterbase roller 3
and water 2 adjusted to an appropriate amount by the draining loam roller 6.
is transferred to the bathing roller 8 via the chrome roller 7 and supplied to the printing plate 10.

In this way, the water source roller 3. draining loam roller 6
．． The chrome roller 7, the water N roller 8, and the plate cylinder 9
When the water roller 3 and the chrome roller 7 are rotated at the same circumferential speed, the water base roller 3 and the chrome roller 7 rotate in opposite directions at the same circumferential speed. Water (K) will be generated. When this stored water (→ is further supplied to the chrome cola 7 and the swimsuit roller 8, the supplied water 50.5D makes the outer peripheral surfaces of both rollers 7°8 wave-like (uneven) as shown in Figure 2. Water is supplied to the plate surface 10 of the plate cylinder 9 as it is.In this way, the water 5D supplied to the bathing roller 8 is supplied to the plate surface 10 of the plate cylinder 9.
If water is supplied to O, the ink will be deposited unevenly on the lid, and a rain phenomenon (not shown) will appear on the printed matter, making it impossible to finish a good printed matter.

FIG. 2 shows the main parts of the mechanism of the present invention. 21
2 is a plate cylinder, 22 is a chrome roller, and 23 is a bathing roller, which are the same as the conventional mechanism. 24 is a gear for the swimsuit roller 23, and a slip clutch (not shown) is used for this gear 24. 25 is a flange of the gear 24, 26 is a nut, and 27 is a disc spring. By connecting the gear 24 with the slip clutch to the swimsuit roller 23 and the chrome roller 22 in this way, the circumferential speed of the swimsuit roller 23, the circumferential speed of the chrome roller 22, and the total circumferential speed (speeding up or deceleration) can be changed. As a result, a slip phenomenon occurs on the contact surfaces of both rollers 22 and 23.

On the other hand, since the swimsuit roller 23 rotates at the same circumferential speed as the plate cylinder 21, the contact surface between the plate surface of the first plate cylinder 21 and the swimsuit roller 23 rotates smoothly without causing a slip phenomenon. That is, as shown in FIG. 1, in the conventional mechanism, the plate cylinder 9. In the mechanism of the present invention, the swimsuit roller 8 and the chrome roller 7 have the same circumferential speed.
The chrome roller 7 and the swimwear roller 8 are made to have the same circumferential speed, but the chrome roller 7 and the swimsuit roller 8 are made to have different circumferential speeds. Therefore, the essential parts of the present invention are to set the circumferential speed of the swimsuit roller 23, the circumferential speed of the plate cylinder 21, and the diagonal circumferential speed, and the chrome roller 2.
Since the circumferential speed of No. 2 and the circumferential speed of the plate cylinder 21 are different from each other, it is sufficient to use a mechanism or device that satisfies this condition. It is also possible to use other means without doing so. If these conditions are met, the spiral supply water will no longer accumulate between the water head roller and the chrome roller, which occurs in the conventional mechanism.

Since the present invention is configured as above 9, water is supplied evenly to the plate surface, the amount of ink can be applied smoothly, and good printed matter is always obtained, and the mechanism itself is simple. This makes it possible to simplify the equipment and make it into a compact unit, making it a water supply system for printing machines that is superior not only to performance, but also to economic efficiency, practicality, and all other aspects. It can be said to be a mechanism.

[Brief explanation of drawings]

Fig. 1 is an explanatory overview showing the mechanism principle and its problems, showing the water supply mechanism in a conventional printing press. Fig. 2 is a partially enlarged outline showing the main parts of the water supply mechanism of the present invention, which is an improvement over the conventional mechanism. It is a diagram. 1... Water tank 3... Water base roller 5A,
5B, 50.5D... Supply water 6...
- Draining loam roller 7... Chrome roller 8... Swimsuit roller 9... Plate cylinder 10
・・・・・・Hanmen 21・・・・・・・Hanmen 111ii 22
...... Chrome roller 23 ... Swimsuit roller 24 ... Gear 9-

Claims (1)

[Claims] Water for water supply attached to the outer circumferential surface of the water base roller rotating in the water tank is DU-rotated in the same direction as the water base roller and in the opposite direction to the water base roller. With rotating chrome rollers. In the water supply mechanism that supplies water to the plate cylinder surface through swimsuit rollers that are in contact with the water base rollers and further rotate in the same direction as the chrome roller, the circumferential speed of the swimsuit roller and the circumferential speed of the plate cylinder are made to be the same circumferential speed, A water supply mechanism for a printing press, characterized in that the circumferential speed of the chrome roller and the circumferential speed of the plate cylinder are different.