JPH0818430B2 - Cylinder cleaning device for printing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder cleaning device of a printing machine, and presses a cleaning cloth against the outer peripheral surface of the cylinder of various printing machines by pressing means, and particularly cleans the cylinder. The present invention relates to a safety mechanism of a cleaning cloth feeding device of an automatic cleaning device.

[Conventional technology]

In a conventional offset printing machine, when printing is continued for a predetermined time, the ink on the surface of the blanket cylinder and the impression cylinder,
Paper dust or the like adheres to stains, and the stains are transferred to the printing paper and stain the printed matter. For this reason, an automatic cleaning device for cleaning the surface of the blanket cylinder and an automatic cleaning device for cleaning the surface of the impression cylinder have been developed with their respective functions. As a typical device thereof, there is one having the following structure. That is, one first roll (cleaning cloth supply roll) and one side roll are provided on the side frames on both sides of the printer body.
A second roll (cleaning cloth winding roll) of the book is rotatably supported parallel to the axis center line of the cylinder. The cleaning cloth supply roll and the cleaning cloth take-up roll are wound around both sides of a belt-shaped cleaning cloth and are given a predetermined tension. The cleaning cloth take-up roll is, as described in, for example, Japanese Patent Publication No. 56-37069, driven by a drive device at a predetermined speed intermittently (for example, once every three seconds) or continuously. . A stay installed on the side plate and parallel to the center axis of the cylinder is arranged between the cleaning cloth supply roll and the cleaning cloth take-up roll, and the cleaning cloth is pressed against the cylinder facing surface of the stay. A pressure pad made of an elastic member is mounted.

By pushing the pressure pad toward the cylinder, the cleaning cloth slidingly moving on the outer surface of the pressure pad is pressed against the cylinder. And
The cleaning cloth is wiped off the surface of the cylinder periphery to clean it.The dirty part of the cleaning cloth is cleaned by removing the pressure pad from the cylinder surface or driving the cleaning cloth take-up roll when the pressure is reduced. Send the cloth to the cleaning cloth take-up roll side, and remove it from the cylinder surface.

[Problems to be Solved by the Invention]

In the conventional device, the winding direction of the cleaning cloth, that is, the traveling direction of the cleaning cloth is opposite to the traveling direction of the pressed cylinder surface. One of the reasons is that when a dirty part of the cleaning cloth is moved in the traveling direction of the cylinder surface, a part 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 is that by reversing the traveling direction of the cylinder surface and the unwinding direction of the cleaning cloth supply roll, the cleaning cloth is prevented from moving together as the cylinder rotates, and the cleaning cloth drives the cleaning cloth take-up roll. Only by this is properly pulled out from the cleaning cloth supply roller.

Generally two adjacent cylinders of an offset printing machine,
For example, the blanket cylinder and the impression cylinder are driven so that the cylinder surfaces travel in the same direction without slipping on each other. Therefore, the rotation directions of both cylinders are opposite. For this reason, the drive directions of the cleaning cloth winding rolls of the cleaning cloth must be opposite between the blanket cylinder cleaning device and the impression cylinder cleaning device. Therefore, it is impossible to use one automatic cleaning device for both the blanket cylinder and the impression cylinder, and two automatic cleaning devices are required, one for each cylinder. This not only means that the cost of the device is 2 units, but depending on the model, the installation space is small and it is impossible to install 2 units of automatic cleaning device. There was a problem that workability was severely impaired.

The object of the present invention is to rotate adjacent two in opposite directions.
It is an object of the present invention to provide a cylinder cleaning device for a printing machine that can be used as one cylinder for one cylinder.

[Means for solving problems]

To achieve the above object, the present invention comprises a first cylinder and a second cylinder which are adjacent to each other and rotate in opposite directions.
In a cylinder cleaning device of a printing machine that performs cleaning by two cleaning units, the cleaning unit includes a side plate,
A first roll and a second roll rotatably supported on the side plate in parallel with the axis of the cylinder, a second roll driving means for rotationally driving the second roll, and both ends of the first roll and the second roll. Is provided with a belt-like cleaning cloth that is wound around the cylinder and is given a predetermined tension, and pressing means that presses the cleaning cloth supplied from the first roll and wound on the second roll toward the outer circumference of the cylinder. Freely supported, first
Side plate drive means for moving the side plate to a position where a cleaning cloth faces the first cylinder when cleaning the cylinder, or a position where a cleaning cloth faces the second cylinder when cleaning the second cylinder; The rotation stopping means for restraining the rotation of the roll and the rotation stopping means are operated to
An operating means for restraining or unconstraining the rotation of the roll is provided to release the restraint of the first roll at the time of cleaning the first cylinder whose rotation direction is different from the feeding direction of the cleaning cloth, and the feeding direction and rotation direction of the cleaning cloth. Is configured to restrain the rotation of the first roll when cleaning the same second cylinder.

[Action]

According to the present invention, during cleaning, the side plate actuating means is operated to swing the side plate toward either the first cylinder or the second cylinder so that the cleaning cloth faces the surface of the cylinder to be cleaned. After that, the cleaning cloth is pressed against the surface of the cylinder to be cleaned by the pressing means to start cleaning.
At this time, if the cylinder to be cleaned is the second cylinder, the first cylinder
When the roll is free to rotate, the force due to the friction between the cylinder and the cleaning cloth acts on the first roll side, and the cleaning cloth moves to the first position.
If it is pulled out from the roll more than necessary amount, or if it is pulled out more than the winding speed of the second roll on the winding side, it may be wound around the cylinder. Cleaning is performed in a rotation restrained state, that is, in a state where the cleaning cloth cannot be pulled out. In supplying the cleaning cloth in this cleaning, the rotation stopping means is operated to release the restrained state of the first roll, and then the second roll is operated. On the other hand, when the cylinder to be cleaned is the first cylinder, since the rotation direction of the cylinder and the feeding direction of the cleaning cloth are different, the force due to the friction between the cylinder and the cleaning cloth is applied to the second roll side, and the first roll is cleaned. Since it does not act as the pulling force of the cloth, the rotation stopping means is not actuated, and the cleaning is performed in the state where the restraint of the first roll is released.

〔Example〕

One embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 1 to 4, a pair of rolls supported by the side plates 6A and 6B at their ends, for example, a first roll (cleaning cloth supply roll) 10 and a second roll (cleaning). Suspended between the cloth winding roll) 11 and
A stay 12 and a hollow portion 12A for pressing or releasing the cleaning cloth 15 supplied from one of the first rolls 10 on the outer circumference of the cylinder of the printing machine.
In the cylinder cleaning device 3 of the printing machine, the cylinder cleaning device 3 is provided with the pressing means including the pad 13 and the driving means for the second roll 11 that winds the cleaning cloth 15 and moves the cleaning cloth 15 relative to the outer circumference of the cylinder 1 or 2. The cleaning cloth supply roll 10 has a rotation stop mechanism that prevents the cleaning cloth from being pulled out by the external force other than the predetermined cloth feeding time, and rotates adjacent to each other in the direction opposite to the feeding direction of the cleaning cloth 15. A first cylinder (for example, a blanket cylinder) 1 and a second cylinder (for example, an impression cylinder) 2 that rotates in the same direction as the feeding direction are provided, and when shifting to the second cylinder 2 side, the cleaning cloth supply roll 10 The rotation stop mechanism of is activated. An operating means is provided for operating the stop of the rotation stopping mechanism by a signal or manually. The rotation stopping mechanism is a claw wheel 30 attached to one shaft end of the first roll 10, a claw 31 engaging with the claw wheel 30, and an air cylinder for attaching and detaching the claw 31 to and from the claw wheel 30.
It is composed of an actuator formed of 36, a spring 32, and the like.

Further, the adapter plate 5A or 5B is attached to the side frame 4A or 4B of the main body (hereinafter, the members having the reference signs A and B are combined by the members having the same reference sign, for example, 4A has 5A). It is fixed. And
A screw hole stud 21A or 21B having a screw hole is embedded in the adapter plate 5A or 5B, and the side plate 6A or 6B is screwed by a set screw 22A or 22B. On the other hand, the shaft 16A or 16B of the cleaning cloth supply roll 10 is supported by the side plate 6A or 6B via the bearing 17A or 17B. bearing
A shaft 18 is formed at the tip of 17A, and a ratchet wheel 30 is screwed by a bolt 19. Also, the shaft 40 of the cleaning cloth take-up roll 11
A or 40B is supported on the side plate 6A or 6B via a bearing 41A or 41B. The shaft portion 42 formed at the tip of the bearing 41B is provided with a pulley of the driving means 43 and the like.

Further, the rotation stopping mechanism will be described. 2 to 4, a claw wheel 30 is attached to the shaft end of the cleaning cloth supply roll 10, and the claw 31 meshes with the claw wheel 30 to restrain the rotation of the cleaning cloth supply roll 10. If the mesh is disengaged, the cleaning cloth supply roll 10 becomes rotatable. The claw 31 is attached to the rotary shaft on a shaft 33 fixed to the side plate 6A.

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

When the rod 37 is biased in the direction of arrow D, the spring
The claw 31 rotates against the pressing force of the 32 and pushes against the ratchet wheel 30 to engage with each other. When the rod 37 is biased in the direction of arrow E and retracts, the spring receiver 35 is pushed by the spring 32,
The claw 31 moves away from the mesh with the claw wheel 30, and the cleaning cloth supply roll 10 is allowed to rotate freely.

The rotation stopping mechanism is not limited to this embodiment as long as it is a mechanism such as an electromagnetic brake that can brake the rotation of the cleaning cloth supply roll.

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 advances in the direction of arrow A, and the cleaning cloth winding roll 11 is driven so that the cleaning cloth 15 is wound in the direction of arrow C. Therefore, the cleaning cloth 15 wound around the cleaning cloth supply roll 10 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 used for cleaning the impression cylinder 2.

The surface of the impression cylinder 2 advances in the direction of arrow B, and the cleaning cloth 15 wound around the cleaning cloth supply roll 10 is unwound, that is, the same direction as arrow C, and the cleaning cloth 15 rotates as the impression cylinder 2 rotates.
However, there is an inconvenience that the water is drawn from the cleaning cloth supply roll 10.

Next, one cleaning device 3 is attached to the adjacent blanket cylinder 1
The operation between the claw and the claw of the ratchet wheel when it is also used as a cleaning device for the impression cylinder 2 will be described. FIG. 7 shows a state in which the blanket cylinder 1 is being washed. The cleaning device 3 is held by the bearing stud 20A and the set screw 22A, and the pad 13
Faces the blanket cylinder 1.

In this position, since the spring receiver 35 is located apart from the air cylinder 36, the pawl 31 is separated from the ratchet wheel 30 by being pressed by the spring 35, and the cleaning supply roll 10 becomes rotatable. Then, the cleaning cloth 15 is fed according to the rotation of the cleaning cloth winding roll 11. FIG. 8 shows a state where the cleaning device 3 is shifted to clean the impression cylinder 2. 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 (the rod 37 is held in a state where it is always extended), and the pawl 31 meshes with the ratchet wheel 30. The rotation of the cleaning cloth supply roll 10 is restricted. Therefore, the rotating direction of the impression cylinder 2 and the feeding direction of the cleaning cloth 15 do not match. The cleaning cloth 15 is not pulled out as the impression cylinder 2 rotates.

FIG. 9 shows a state in which the cleaning cloth 15 is delivered during the cleaning operation of the impression cylinder 2. First, when the rod 37 of the air cylinder 36 is pulled (biased in the direction of E), the spring receiver 35 is pushed by the spring 32, the pawl 31 is separated from the pawl wheel 30, and the cleaning cloth supply roll 10 is rotatable. It becomes a state.

At the same time, the pressing pad 13 is separated from the impression cylinder 2 to release the cleaning cloth 15, and the cleaning cloth winding roll 11 is driven, so that the cleaning cloth 15 is fed. The above operation is repeated during the cleaning time.

〔The invention's effect〕

According to the present invention, the cylinder cleaning device of the printing press is provided with the rotation stopping mechanism for the first roll, thereby preventing the cleaning cloth from being drawn out during the cleaning process of the second cylinder whose rotation direction is the same as the feeding direction of the cleaning cloth. At the same time, the cleaning device can also be used as the first cylinder, which is different in the direction in which the cleaning cloth is fed out and the direction in which the cleaning cloth is rotated, and the mounting space is reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG.
FIG. 3 is a sectional view taken along line II-II in FIG. 3, and FIG. 3 is III-III in FIG.
FIG. 4 is a sectional view taken along the line, FIG. 4 is a side view seen from the direction of the line IV-IV in FIG. 1, and FIGS. 5 to 9 are views for explaining the operation of the present invention. 1 ... 1st cylinder (for example, blanket cylinder), 2 ... 2nd cylinder (for example, impression cylinder), 6A, 6B ... Side plate,
10 …… First roll (cleaning cloth supply roll), 11 …… Second roll (cleaning cloth winding roll), 15 …… Cleaning cloth, 30 …… Claw wheel, 31 …… Pawl, 36 …… Actuator (air cylinder )

Claims (1)

[Claims] 1. A cylinder cleaning apparatus for a printing press, comprising: a cleaning unit for cleaning a first cylinder and a second cylinder which are adjacent to each other and rotate in opposite directions. The cleaning unit includes a side plate and a side plate. A first roll and a second roll which are rotatably supported parallel to the axis of the cylinder, a second roll driving means for rotating the second roll, and both ends wound around the first roll and the second roll. And a pressing means for pressing the cleaning cloth supplied from the first roll and wound on the second roll toward the outer circumference of the cylinder. Slidably supported so that a cleaning cloth faces the first cylinder when cleaning the first cylinder, or the second cylinder is cleaned when cleaning the second cylinder. Side plate driving means for moving the side plate to any of the positions where the cloth faces, rotation stopping means for restraining the rotation of the first roll, and rotation restraining means for restraining or restraining the rotation of the first roll. An operating means for releasing the cleaning cloth is provided to release the restraint of the first roll when cleaning the first cylinder whose rotation direction is different from the feeding direction of the cleaning cloth, and at the same time the rotation direction is the same as the feeding direction of the cleaning cloth. Two
A cylinder cleaning device for a printing press, wherein the rotation of the first roll is restricted when cleaning the cylinder.