JPH0739176B2 - 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 for a printing press, and more particularly, it simplifies means for detecting a notch in each cylinder of a multi-color printing press, while simplifying each color. The present invention relates to means for reliably operating the cleaning unit while avoiding the interference between the cleaning unit corresponding to the above and the notch.

[Prior Art] There are various types of cylinder cleaning devices, such as one in which a cleaning cloth containing cleaning liquid is pressed against the cylinder, and one in which a rotating brush containing solvent is pressed against the cylinder without using the cleaning cloth. is there. In any type of cleaning device, in order to avoid interference between the cleaning unit and the notch of the cylinder to be cleaned, the cleaning unit needs to be retracted from the notch of the cylinder.

Here, a cleaning unit of a type in which a cleaning cloth containing a cleaning liquid is pressed against a cylinder will be described.
As long as the printing machine needs to avoid the interference between the cleaning unit and the cutout portion of the cylinder to be cleaned, it can be applied to other types of cleaning devices.

Now, as one of the conventional cylinder cleaning units, an example of a configuration of an impression cylinder cleaning unit is shown in FIGS. 3 and 4 together with an impression cylinder to be cleaned.

In these figures, 2 is an impression cylinder to be washed, 4 is a notch for accommodating a paper pressing claw 6 for grasping the edge of a sheet (not shown), 8A and 8B are side plates, 10 is a cloth supply roll, 12 is a cloth take-up roll, 14 is a cleaning cloth fed from the cloth supply roll 10 and wound on the cloth take-up roll 12, 16 is a support bar fixed to the side plates 8A and 8B, and 18 is a cleaning liquid on the cleaning cloth prior to cleaning. The cleaning liquid spray bar for spraying 20 is a pressure pad for pressing the cleaning cloth 14 against the impression cylinder 2 during cleaning.

The cleaning cloth take-up roll 12 is driven intermittently or continuously at a predetermined speed by a driving device as described in, for example, Japanese Patent Publication No. 56-37069. In a sheet-fed printing press such as this example, the cleaning cloth is wound at a position facing the impression cylinder notch portion 4, and the pressure pad 20 is directed toward the impression cylinder 2 at a position other than the notch portion 4. By pushing out, the cleaning cloth 14 located on the outer peripheral surface of the pressure pad 20 is pressed against the impression cylinder 2 to clean it.

[Problems to be Solved by the Invention] In the cutout portion 4 of the impression cylinder 2, there is a paper pressing claw 6 for grasping a sheet (not shown). When the cleaning unit hits this, the cleaning cloth 14 is caught and extra. Not only is it not pulled out to normal cleaning, but also the cleaning cloth 14 is caught in the printer body side, which causes trouble.

An outline of conventional means for eliminating this cause is shown in FIGS. 5 and 6.

In the system shown in FIG. 5, a cam is formed at the end of the impression cylinder corresponding to the cutout portion 4, and the cleaning unit is forcibly lifted while the cutout portion 4 passes through.

In the system shown in FIG. 6, a sensor for optically or electromagnetically detecting the cutout portion 4 is attached, and while the cutout portion 4 passes, the cleaning unit is forcibly retracted by an air cylinder or the like (not shown). Has become.

In these methods, in the case of multicolor printing, the positions of the notches of the impression cylinders of the printing units 30 of the respective colors are generally displaced from each other as shown in FIG. It had to be installed separately in the printing unit 30.

Also, even when aligning the escape timing of the notch,
For each printing unit, mechanically move the detection mechanism,
It had to be adjusted and processed.

In addition, even if the print units are once adjusted, if some of the printing units are replaced, it is necessary to readjust mechanically.

An object of the present invention is to reliably retract the cleaning unit installed in each printing unit from the cutout portion in response to a detection signal from a single rotational position detection mechanism in a multicolor printing machine, and to wash the cleaning unit and the cutout portion. It is an object of the present invention to provide a cylinder cleaning device for a printing machine that can avoid interference with the cylinder.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a notch portion for accommodating a mechanism for grasping an end portion of a sheet-like member such as a sheet, and rotates at the same rotation speed. To separate from the outer peripheral surface of the cylinder so as to avoid the notches of the plurality of cylinders,
In a cylinder cleaning device of a sheet-fed printing press including a plurality of cleaning units that presses a cleaning member against the outer peripheral surface of the cylinder after passing through the notch to clean the dirt on each cylinder, Means for generating a timing pulse at a reference position of the rotary shaft, which is arranged in the vicinity,
The notch angle of each cylinder, the position of the notch of the specific cylinder with respect to the reference position of the rotary shaft, the displacement of the notch of the remaining cylinder with respect to the position of the notch of the particular cylinder, Means for previously inputting the arrangement position of each cleaning unit as angle data, and means for estimating and calculating the angular position of the notch of each cylinder based on the angle data and the timing pulse, and outputting an operation command to each cleaning unit. The present invention proposes a cylinder cleaning device for a printing machine having the same.

[Operation] In the present invention, the notch angle of each cylinder, the position of the notch of the particular cylinder with respect to the reference position of the rotation axis of the particular cylinder, and the notch of the remaining cylinder with respect to the position of the notch of the particular cylinder. The positional deviation of the notch and the position of each cleaning unit around each cylinder are input in advance as angle data, and a timing pulse is generated at the reference position of the rotation axis of a specific cylinder. The angular position of the cutout portion of each cylinder is estimated and calculated based on the above, and an operation command is output to each cleaning unit.First, it is not necessary to provide means for detecting the cutout portion of the cylinder for each printing unit. The whole system configuration becomes simple.

Also, even when aligning the escape timing of the notch,
It is only necessary to change the angle data that is input in advance, and there is no need to mechanically move the detection mechanism or perform adjustment processing for each printing unit.

Further, even if a part of the printing unit is replaced after being adjusted once, it is only necessary to change the angle data, and the trouble of mechanical readjustment can be saved.

Therefore, in the multicolor printing machine, the cleaning unit installed in each printing unit is reliably retracted from the notch by the detection signal from only one rotational position detecting mechanism, and the interference between the cleaning unit and the notch is prevented. Can be avoided.

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIGS. 1 and 2. Here, the present invention will be described by taking an impression cylinder cleaning unit as an example. However, if a plurality of cylinders having cutout portions and rotating at the same rotation speed are used, a blanket cylinder,
It will be apparent that the present invention can be applied to a cleaning device for various cylinders such as an impression cylinder and a blanket cylinder of a rotary press.

FIG. 1 is a diagram showing an outline of a system configuration of an embodiment in which the present invention is applied to an impression cylinder washing machine of a multicolor printing sheet printing machine.

In this case, the printing units 30 have four colors, and each printing unit 30 is provided with one cleaning unit 40. Each cleaning unit 40 is connected to a cleaning liquid tank 60 and an air supply source (not shown) by a connector 50. The coupler 50 is connected to the arithmetic unit CPU and the memory via the input / output interface I / O of the controller 70. The controller 70 generates a timing pulse at a predetermined rotation position of the rotary shaft 31 of the impression cylinder 2 of the first color printing unit 30, for example, once every one rotation from the rotation part of any printing machine. Capture the output timing signal. In addition, various angle data and the like input from the operation panel 80 by, for example, a keyboard can be loaded. The angle data, the calculation result, and the like that are input in advance are stored in the memory in the controller 70 and are retained unless they need to be changed.

Now, in the impression cylinder cleaning apparatus of the present embodiment having such a configuration, first, various angle data of the printing machine are input from the operation panel 80. The angle data to be input includes the angle of the notch portion 4 of each impression cylinder 2, the position of the notch portion of the first color impression cylinder with respect to the timing pulse generation reference position of the rotary shaft 31 of the first color printing unit 30, The positional deviation of the notch of the impression cylinder 2 of each remaining printing unit 30 relative to the position of the notch of the one-color impression cylinder, the arrangement position of each cleaning unit 40 around each impression cylinder 2, and the like are input in advance as angle data. To do. These angle data are used for printing unit 30 and cleaning unit of the target printing machine.
Unless you change 40, it will be fixed, so controller
Store it in the memory of 70 and save it.

When the actual printing is started, a timing signal output from the timing sensor 90 once per one rotation is fetched at a predetermined rotation angle position of the rotation shaft 31 of the first color printing unit 30.

The controller 70 creates an angle timing map of the impression cylinder 2 in each printing unit 30, as shown in the upper half of FIG. 2, based on the fetched timing signal and the previously input angle data.

Further, the controller 70, as shown in the lower half of FIG.
Create a cleaning program. Here, in order to avoid complication, the cleaning program for the printing units 30 for the second to fourth colors is not shown, but is the same as the cleaning program for the printing unit 30 for the first color. The cleaning program is a program for setting how many times the cleaning unit 40 is brought into contact with the impression cylinder 2, how many times the cleaning liquid is sprayed, how many times the cleaning cloth 14 is sent, and the like in one cleaning cycle. It is desirable to set some types in advance so that the user can select depending on the degree.

When the cleaning is started by the user's operation, the cleaning program performs the cleaning operation in synchronization with the timing map of each printing unit 30. Controller 70 in FIG.
The signal from is operated by operating a solenoid valve or the like in the coupler 50 to control the air serving as the power source of each cleaning unit 40, and is cleaned by the notch 4 of each impression cylinder 2 obtained by the estimation calculation. Unit 40
To evacuate.

Since the timing map is obtained as a function of the rotation angle of the printing machine based on the timing signal, the notch position on the map does not change even if the operating speed of the printing machine changes.

In this embodiment, the positional relationship between the impression cylinder 2 to be cleaned and the cleaning unit 4 is clearly grasped in the arithmetic unit CPU in the controller 70, and the position of the notch 4 is strictly controlled by the arithmetic unit. Therefore, in creating the cleaning program, the cleaning cloth 14 is finely fed at the beginning of the cleaning, the cleaning cloth 14 is largely fed at the end of the cleaning, and the impression cylinder 2 with the notch 4 removed.
The entire circumference of the cleaning cloth is extensively sent to the clean part of the cleaning cloth 14, and the cleaning is completed by one operation of the cleaning unit 40.
By sending the cleaning cloth 14 in the middle of the impression cylinder 2, it is possible to eliminate the stripes of dirt that have been conventionally generated. Therefore, the cleaning program can be freely created, the cleaning effect is increased, and the cleaning cloth can be efficiently used.

Here, as a method of expressing the angular positional deviation between the notch portions of each cylinder, first, the positional deviation of the notch portion of the particular cylinder with respect to the reference position of the rotation axis of the particular cylinder is expressed as In the above, a method is used to represent the position shift of the notch portion of the remaining cylinder with respect to the position of the notch portion of that particular cylinder. The present invention is effective even if the method of expressing the position shift of the notch portion is adopted.

In the above embodiment, the cleaning unit in which the cleaning cloth containing the cleaning liquid is pressed against the cylinder has been described.
It will be apparent that the present invention can be applied to a cleaning device or the like that uses a rotary brush containing a solvent as long as it is a printing machine that needs to avoid interference between the cleaning unit and the cutout portion of the cylinder to be cleaned. .

EFFECTS OF THE INVENTION According to the present invention, the cutout angle of each cylinder, the position of the cutout portion of the specific cylinder with respect to the reference position of the rotation axis of the specific cylinder, and the remaining position relative to the position of the cutout portion of the specific cylinder. The positional deviation of the notch of the cylinder and the arrangement position of each cleaning unit around each cylinder are input in advance as angle data, and a timing pulse is generated at the reference position of the rotation axis of a specific cylinder to generate the angle data. Also, the angular position of the notch of each cylinder is estimated and calculated based on the timing pulse and an operation command is output to each cleaning unit. Therefore, first, it is necessary to provide a means for detecting the notch of the cylinder for each printing unit. Is eliminated, and the entire system configuration is simplified.

Also, even when aligning the escape timing of the notch,
It is only necessary to change the angle data that is input in advance, and there is no need to mechanically move the detection mechanism or perform adjustment processing for each printing unit.

Further, even if a part of the printing unit is replaced after being adjusted once, it is only necessary to change the angle data, and the trouble of mechanical readjustment can be saved.

Therefore, in the multicolor printing machine, the cleaning unit installed in each printing unit is reliably retracted from the notch by the detection signal from only one rotational position detecting mechanism, and the interference between the cleaning unit and the notch is prevented. Can be avoided.

[Brief description of drawings]

FIG. 1 is a diagram showing a system configuration of an embodiment of a cylinder cleaning apparatus for a printing press according to the present invention, FIG. 2 is a timing chart showing an example of a timing map and a cleaning program of the embodiment of FIG. 1, FIG. FIG. 4 is a side view and a perspective view showing a general relationship between an impression cylinder and an impression cylinder cleaning unit,
FIG. 5 is a view showing a positional relationship between a notch portion and a cam of a conventional method for retracting a cleaning unit by a cam, and FIG. 6 is a conventional method of retracting a cleaning unit by a notch position signal from a detection sensor. FIG. 7 is a diagram showing the relationship between the notch portion and the arrangement position of the detection sensor, and FIG. 7 shows the positional relationship of the notch portion of the cylinder with respect to the position of the notch portion of the cylinder of the impression cylinder notch portion of the multicolor printing press. It is a figure which shows an example. 2 ... impression cylinder, 4 ... notch, 6 ... paper holding claw, 8A, 8B
...... Side plate, 10 …… Cloth supply roll, 12 …… Cloth winding roll, 14 …… Cleaning cloth, 16 …… Support bar, 18 ……
Cleaning liquid spray bar, 20 …… Pressure pad, 30 ……
Printing unit, 31 …… Rotary axis, 40 …… Cleaning unit, 50
...... Coupler, 60 …… Cleaning liquid tank, 70 …… Controller, 80 …… Control panel, 90 …… Timing sensor.

Claims (1)

[Claims] 1. A cylinder having a cutout portion for accommodating a mechanism for grasping an end portion of a sheet-like member such as a sheet and the like so as to avoid the cutout portion of a plurality of cylinders rotating at the same rotation speed. Of a sheet-fed printing press including a plurality of cleaning units for cleaning the dirt on each cylinder by pressing the cleaning member against the outer peripheral surface of the cylinder after the cutout portion has passed therethrough. In the cleaning device, means for generating a timing pulse at a reference position of the rotary shaft, which is arranged near the rotary shaft of the specific cylinder, a notch angle of each cylinder, and a cutout angle of the specific cylinder with respect to the reference position of the rotary shaft. The position of the notch, the position shift of the notch of the remaining cylinder with respect to the position of the notch of the specific cylinder, and the arrangement position of each cleaning unit around each cylinder are And a unit for preliminarily calculating the angular position of the notch of each cylinder based on the angle data and the timing pulse, and outputting an operation command to each of the cleaning units. Cylinder cleaning device for printing machines.