JPH0220349A - Cylinder washing apparatus of printing press - Google Patents

Abstract

PURPOSE:To prevent the draw-out of washing cloth during the washing of an impression cylinder and to use one washing apparatus for both of a blanket cylinder and the impression cylinder by providing a rotation stop mechanism to a cloth supply roll. CONSTITUTION:When a blanket cylinder 1 is washed, a washing apparatus 3 is opposed to the blanket cylinder 1. Whereupon, a pawl 31 is pushed by a spring 35 to be separated from a ratchet wheel 30 and a cloth supply roll 10 becomes freely rotatable. Washing cloth 15 is delivered by rotating a cloth take-up roll 11. When an impression cylinder 2 is washed, the washing apparatus 3 is shifted toward the impression cylinder 2 and a spring receiver 35 is brought into contact with the rod 37 of an air cylinder 36 and the pawl 31 is meshed with the ratchet wheel 30 to restrict the rotation of the cloth supply roll 10. The washing cloth 15 is not drawn out even when the impression cylinder 2 is rotated. Next, the rod 37 of the air cylinder 36 is drawn in to make the cloth supply roll 10 freely rotatable and a press pad 13 is separated from the impression cylinder 2 and the cloth take-up roll 1 is driven to send the washing cloth 15. This operation is repeated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printing press cylinder cleaning method and apparatus,
The present invention relates to a safety mechanism of a cleaning cloth feeding device of an automatic cleaning device that presses a cleaning cloth by a pressing means against the outer peripheral surface of a cylinder of various printing machines, and particularly cleans the cylinder.

[Conventional technology]

In conventional offset printing machines, ink paper dust and the like adhere to and stain the surfaces of the blanket cylinder and impression cylinder that continue printing for a predetermined period of time, and this stain is transferred to the printing paper and stains the printed matter. For this reason, automatic cleaning devices for cleaning the surface of the blanket cylinder and automatic cleaning devices for cleaning the surface of the impression cylinder have been developed, each with its own functions.
A typical example of such a device is one with a blow-like structure. In other words, one first roll (cleaning cloth supply roll) and one second roll (cleaning cloth take-up reroll) are attached to a pair of side plates attached to the side frames on both sides of the printing press main body, and the center of the axis of the cylinder is It is rotatably supported parallel to the line. Both ends of a belt-shaped cleaning cloth are wound around these cleaning cloth supply rolls and cleaning cloth take-up rolls, and a predetermined tension is applied thereto. The cleaning cloth take-up roll is rotated intermittently (for example, once every 3 seconds) or continuously by a recording device at a predetermined speed, as described in Japanese Patent Publication No. 56-37069, for example. Ru. Between the cleaning cloth supply roll and the cleaning cloth take-up reroll, a stay is arranged parallel to the central axis of the cylinder between side plates on both sides, and a cleaning cloth pressing means is provided on the surface of the stay facing the cylinder. A pressure pad made of an elastic member is attached. By pressing the pressure pad toward the cylinder, the cleaning cloth that slides on the outer surface of the pressure pad is pressed against the cylinder. During this time, the outer surface of the cylinder is wiped clean, and the dirty portion of the cleaning cloth is removed by removing the pressure pad from the cylinder surface or by reducing the pressure, and then driving the cleaning cloth take-up reroll. The cleaning cloth is sent to the cleaning cloth take-up reroll side and removed from the cylinder surface.

[Problem to be solved by the invention]

In conventional devices, the winding direction of the cleaning cloth, that is, the traveling direction of the cleaning cloth is opposite to the traveling direction of the cylinder surface being pressed. One of the reasons for this is that when the dirty part of the cleaning cloth is moved in the direction of movement of the cylinder surface, some of the dirt on the cleaning cloth surface is transferred to the cylinder surface again, and the dirt remains on the cylinder surface forever. The reason for this is that by reversing the advancing direction of the cylinder surface and the unwinding direction of the cloth supply roll, the cleaning cloth is prevented from moving together with the rotation of the cylinder, and the cleaning cloth can only be removed by driving the cloth take-up roll. , to ensure that the cloth is pulled out correctly from the cloth supply roller.

Generally, two adjacent cylinders of an offset printing press, such as a blanket cylinder and an impression cylinder, are driven so that their cylinder surfaces move in the same direction without slipping relative to each other. Therefore, the rotation directions of both cylinders are opposite. For this reason, a blanket cylinder cleaning device,
In the cleaning device for the impression cylinder, the driving direction of the cloth winding roll of the cleaning cloth must be opposite, so it is impossible to use one automatic cleaning device for both the blanket cylinder and the impression cylinder, and There was a problem in that two automatic cleaning devices were required, one for each barrel. This not only means that the cost of two automatic cleaning devices is required, but also that depending on the model, the installation space is so small that it is impossible to install two automatic cleaning devices, and even if it is installed, the printing machine There is also the problem that the workability of the machine is significantly impaired.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an automatic cleaning device that can be used for two adjacent cylinders that rotate in opposite directions.

[Means to solve the problem]

In order to achieve the above object, the cylinder cleaning device for a printing press according to the present invention is suspended between a pair of first rolls whose respective ends are supported by side plates, and the cleaning device supplied from one of the rolls is suspended between a pair of first rolls whose ends are supported by a side plate. Cylinder cleaning of a printing press, comprising a pressing means for pressing or separating cloth from the outer periphery of a cylinder of a printing press, and a driving means for the other second roll for winding up the cleaning cloth and moving it relative to the outer periphery of the cylinder. The apparatus is configured to include a rotation stop mechanism that prevents the first roll from rotating due to an external force outside of a predetermined cloth feeding time and from pulling out the cleaning cloth.

Then, when shifting to the side of the other cylinder of the printing machine, which is equipped with one cylinder that is adjacent to each other and rotates in the direction opposite to the direction in which the cleaning cloth is fed out, and the other cylinder that rotates in the same direction as the direction in which the cleaning cloth is fed out, The rotation stopper end of the first roll is operated and an operating means is provided to stop it by a signal or manually, and the rotation stop mechanism is engaged with a ratchet wheel attached to one shaft end of the roll. and an actuator that attaches and detaches the pawl to and from the ratchet wheel.

[Effect]

According to the present invention, by providing one first roll (fabric supply roll) of a cylinder cleaning device of a printing press with a rotation stop mechanism, the other cylinder (impression cylinder) rotates in the same direction as the cleaning cloth feeding direction. When the cleaning cloth is shifted to the side, the rotation stop mechanism is activated, and its stop is operated by a signal or manually, so the cleaning cloth is not unnecessarily pulled out and is removed from the other second roll (cloth winding reroll). It is wound up.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 to 9.

As shown in FIGS. 1 to 4, the side plate 6A
and 6B, each end of which is supported by a pair of rolls, such as a first roll (fabric supply roll) 10 and a second roll (fabric winding reroll) 11, and one of the first rolls, for example, a cloth supply roll. A stay 12 that presses or releases the cleaning cloth 15 supplied from 10 to the outer periphery of the cylinder of the printing press.
．． It was equipped with a pressing means consisting of a hollow part 12A and a pad 13, and a driving means for the other second roll, for example, the cloth winding reroll 11, which winds up the cleaning cloth 15 and moves it relative to the outer periphery of the cylinder 1 or 2. In the cylinder cleaning device 3 of the printing press, the cloth supply roll 10 is configured to be provided with a rotation stop mechanism that prevents the cloth supply roll 10 from being rotated by an external force other than the predetermined cloth feeding time and the cleaning cloth is pulled out. The other cylinder of a printing press is equipped with one cylinder, for example, a bracket cylinder 1, which rotates in the opposite direction to the direction in which the cleaning cloth 15 is fed out, and the other cylinder, for example, an impression cylinder 2, which rotates in the same direction as the direction in which the cleaning cloth 15 is fed out. For example, impression cylinder 2
When the cloth supply roll 10 is shifted to the side of A ratchet wheel 30 attached to the end, a pawl 31 that engages with the ratchet wheel 30, and a pawl 31 that is connected to the ratchet wheel 3.
Air cylinder 36 and spring 3 to be attached and detached from 0
This configuration consists of an actuator formed of 2 or the like.

To further explain the configuration, the side frame 4A or 4B of this machine is equipped with an adapter plate 5A or 5B (hereinafter, members with symbols A and B are assumed to be assembled with members with the same symbol, for example, 5A is fixed to 4A by a stud 7. A screw hole stud 21A or 21B having a screw hole is implanted in the adapter plate 5A or 5B, and the side plate 6A or 6B is screwed onto the adapter plate 5A or 5B using a set screw 22A or 22B.

On the other hand, the shaft 16A or 16B of the cloth supply roll 10 is connected to the side plate 6A or 6B via a bearing 17A or 17B.
The tip of the bearing 17A is formed on the shaft portion 18, and a ratchet wheel 30 is screwed onto the shaft portion 18 by a bolt 19. Further, the shaft 40A or 40B of the cloth winding reroll 11 has a bearing 41A or 41.
A shaft portion 42 is formed at the tip of a bearing 41B, and a pulley of a driving means 43 is engaged with the shaft portion 42.

Furthermore, a supplementary explanation will be given regarding the rotation stop mechanism.

As shown in FIGS. 2 to 4, a ratchet wheel 30 is attached to the shaft end of the cloth supply roll 10, and the rotation of the cloth supply roll 10 is restrained by the engagement of the pawls 31, and the meshing is released. If so, the cloth supply roll 10 becomes rotatable. The claw 31 is rotatably attached to a shaft 33 fixed to the side plate 6A.

A spring receiver 35 is fixed to the end surface of the claw 31 opposite to the claw, and a spring 32 having both ends fixed thereto is provided between one side of the spring receiver 35 and a spring base 34 fixed to the side plate 6A. . Therefore, one side of the spring receiver 35 is pressed by the spring 32, and the other side is in contact with the tip of the rod 37 of the air cylinder 36 screwed onto the adapter plate 5A via the bracket 38.

When the rod 37 is biased in the direction of the arrow, the pawl 31 rotates against the pressure of the spring 32, pushing the train 30 into engagement. Further, when the rod 37 is urged in the direction of the arrow E and retracted, the spring receiver 35 is pushed by the spring 32, the claw 31 is disengaged from the electric train 3o, and the cloth supply roll 10 can freely rotate. .

Note that the rotation stopping mechanism may be any mechanism that can brake the rotation of the cloth supply roll, such as an electromagnetic brake, and is not limited to this embodiment.

Next, FIG. 5 shows a state in which the automatic cleaning device 3 is cleaning the blanket cylinder 1. The surface of the blanket cylinder 1 is progressing in the direction of arrow A, and the cloth winding reroll 11 is driven so that the cleaning cloth 15 is wound up in the direction of arrow C. Therefore, the cleaning cloth 15 wound around the cloth supply roll 10 is in a used state in which it is not pulled out as the blanket cylinder 1 rotates.

FIG. 6 shows a state in which the automatic cleaning device 3 is shifted to the positioning member 45 and is used for cleaning the impression cylinder 2.

The surface of the impression cylinder 2 advances in the direction of the arrow B, which is the direction in which the cleaning cloth 15 wound around the cloth supply roll 10 unravels, that is, the same direction as the arrow C, and as the impression cylinder 2 rotates, the cleaning cloth 1
5 is drawn out from the cloth supply roll 10.

Then, one cleaning device 3 is attached to the adjacent blanket cylinder 1.
The operation between the electric train and the claw when used also as a cleaning device for the impression cylinder 2 will be explained.

FIG. 7 shows the state in which the blanket cylinder 1 is being cleaned. The cleaning device 3 includes a bearing stud 20A and a set screw 22A.
The pad 13 is held opposite the blanket cylinder 1.

In this position, the spring receiver 35 is located away from the air cylinder 36, so the spring 35 pushes the claw 35 away from the air cylinder 36.
1 has left the train 30, and the cloth supply roll 10 is free to rotate. The cleaning cloth 15 is then fed out as the cloth take-up roll 11 rotates.

FIG. 8 shows a state in which the cleaning device 3 is shifted and the impression cylinder 2 is being cleaned. When the cleaning device 3 is shifted to the impression cylinder 2 side, the spring receiver 35 comes into contact with the rod 37 of the air cylinder 36, and the rod 37 is always held in the protruding state), the claw 31 engages with the train 30, and the cloth Supply roll 10
Constrains the rotation of. Therefore, the direction of rotation of the impression cylinder 2 and the cleaning cloth 1
5, the cleaning cloth 15 is not drawn out due to the rotation of the impression cylinder 2.

FIG. 9 shows a state in which the cleaning cloth 15 is fed out while the impression cylinder 2 is being cleaned. First, when the rod 37 of the air cylinder 36 is retracted (forced in the direction of E), the spring receiver 35 is pushed by the spring 32, the claw 31 is separated from the train 30, and the cloth supply roll 10 becomes rotatable.

At the same time, the pressing pad 13 is separated from the impression cylinder 2 to release the cleaning cloth 15, and the cloth take-up roll 11 is driven to feed the cleaning cloth 15. The above operations are repeated during the cleaning period.

〔Effect of the invention〕

According to the present invention, by providing a rotation stopping mechanism for the first roll (cloth supply roll) in the cylinder cleaning device of a printing press, the cleaning cloth is prevented from being pulled out during the cleaning process of the other cylinder (impression cylinder). One cylinder (blanket cylinder)
At the same time, the cleaning device can also be used, and the installation space is reduced.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
Figure 3 is a cross-sectional view taken along the lines ■ and ■ in Figure 1, Figure 4 is a side view taken from the line ■ and ■ in Figure 1, Figure 5 - FIG. 9 are diagrams for explaining the present invention in detail. 1... One cylinder (blanket cylinder) 2... Other cylinder (impression cylinder) 6A, 6B... Side plate

Claims (1)

[Claims] 1. A cleaning cloth suspended between a pair of rolls whose ends are supported by a side plate, and which is supplied from one of the first rolls, is pressed onto or released from the outer periphery of a cylinder of a printing press. and a drive means for the other second roll that winds up the cleaning cloth and moves it relative to the outer circumference of the cylinder. 1. A cylinder cleaning device for a printing press, characterized in that the cylinder cleaning device for a printing press is provided with a rotation stop mechanism that rotates by an external force at times other than the time when the cleaning cloth is fed out, and prevents the cleaning cloth from being pulled out. 2. When shifting to the side of the other cylinder of a printing machine equipped with one cylinder that is adjacent to each other and rotates in the opposite direction to the cleaning cloth feeding direction, and the other cylinder that rotates in the same direction as the cleaning cloth feeding direction. 2. The cylinder cleaning device for a printing press according to claim 1, further comprising operating means for operating the first roll rotation stopping mechanism and manually operating the stoppage by a signal or a signal. 3. The rotation stopping mechanism is characterized by comprising a ratchet wheel attached to one shaft end of the roll, a pawl that engages with the ratchet wheel, and an actuator that attaches and detaches the pawl to and from the ratchet wheel. A cylinder cleaning device for a printing press according to claim 1 or 2.