JPH05193125A - Method and device for cleaning ink roller of rotary press - Google Patents

Abstract

PURPOSE:To improve work efficiency and reduce the quantity of spoilage by supplying cleaning liquid mechanically without waste, while cleaning guide rollers and blanket cylinders simultaneously. CONSTITUTION:In a rotary press 2, a group of ink rollers 4 are arranged from the downside up to the upside, dampening rollers 6 are provided, and a plate cylinder 8 and a blanket cylinder 10 are provided in the upper part of the machine. A cleaning device 12 for cleaning the ink rollers 4 are also provided to the rotary press 2 in addition to the aforementioned devices. The numbers 14 and 16 in the attached figure indicate respectively an ink tank and a water tank, and the number 18 in the attached figure indicates running paper. The cleaning device 12 is constructed of a jetting part 22 equipped with a plurality of jetting nozzles 20 facing the downside of the ink rollers 4, and a jetting control part 24 which injects cleaning liquid little by little through each of the jetting nozzles 20 in accordance with a cleaning program inputted into the control part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning an ink roller in a newspaper press or the like and a cleaning device therefor.

[0002]

2. Description of the Related Art If ink residue is left on an ink roller of a newspaper press or the like, the quality of the printed surface will be deteriorated in the next printing. Therefore, cleaning is performed when the plate is replaced or when printing is completed. ing.

In the cleaning of such an ink roller, conventionally, a rotary press is operated at a high speed in a cylinder-inserted state, that is, a printing state in which an impression cylinder, a blanket cylinder and the like are in contact with each other, and a cleaning liquid is manually applied from above the ink roller group. To disperse the ink stains on the running paper, or to spray the cleaning liquid on the ink roller by hand and to contact the ink cylinder that contacts the ink roller with a scraping device called a doctor blade. Measures such as scraping off dirt are taken. Here, high-speed operation is about 20,000 copies /
It refers to the operation of the speed level at the time, and slow operation is about 2400
Refers to driving at a speed level of parts / hour (the same applies hereinafter).

[0004]

By the way, as described above, the method of manually spraying the cleaning liquid from the upper side of the ink roller group is not only complicated and dangerous by manual work, but also
The amount of spraying is non-uniform and it is a divisional amount, and since it is sprayed from the downstream side to the upstream side of the ink flow, the spraying amount is large, and the spraying position also covers the circumference of the ink roller group etc. Is limited by the presence of the so that the cleaning time becomes long.

For this reason, in addition to the large amount of sprayed cleaning liquid, the amount of running paper used, that is, the amount of wasted paper increases, which is uneconomical.

Further, in recent years, although the number of presses has increased due to the increase in the number of pages, conversely, the number of operators tends to be reduced due to labor saving, and one operator must fly between the presses. Because you have to
It is becoming difficult to clean with time and care. For this reason, at the same time, there is also a problem that printing accuracy is deteriorated due to roughness of cleaning accuracy due to reduction of cleaning time.

Further, in the case of the method of scraping with a doctor blade, in addition to the original work of cleaning the ink roller, it is necessary to clean the doctor blade itself, resulting in complicated work and increased labor. It will be.

Incidentally, in the cleaning for the purpose of avoiding the deterioration of the quality of the printed matter in the rotary press of this kind, not only the ink roller but also the guide roller and the blanket cylinder are naturally required to be cleaned. For cleaning rollers and blanket cylinders, a mechanical cleaning method by slow running of a rotary press has been established.

Therefore, in terms of the entire cleaning work, it is possible to shorten the cleaning time in the entire rotary press by performing various kinds of cleaning at the same time without performing them individually. In the method, when the slow operation is performed, the washing liquid is wasted, so that the condition of the high speed operation cannot be avoided from the economical and time aspects. For this reason, the guide rollers and the blanket cylinder cannot be washed at the same time, and the current work efficiency cannot be improved.

Therefore, the present invention provides a cleaning method for an ink roller and a cleaning apparatus suitable for the cleaning method, which can supply the cleaning liquid mechanically without waste, thereby improving the work efficiency by reducing the time and reducing the amount of wasted paper. Is its purpose.

Another object of the present invention is to provide a method for cleaning an ink roller which can improve the efficiency of the entire cleaning operation by simultaneously cleaning the guide roller, the blanket cylinder and the like.

[0012]

The present invention was devised to achieve the above object, and is characterized in that the rotary press is in a cylinder-entering operation state after printing is completed, and the rotary press is installed below the ink roller group. A process in which a cleaning liquid is sprayed on the ink roller at the upstream part of a certain ink flow to dissolve the ink on the surface layer, and the dissolved ink stains are sequentially transferred to the upper side where the blanket cylinder etc. are located and finally adsorbed on the running paper. It is in.

Further, according to the present invention, it is possible to adopt a system in which the injection of the cleaning liquid is carried out a plurality of times in small amounts under electrical control.

According to the present invention, the rotary press can be operated at a slow speed.

Further, according to the present invention, it is possible to adopt a system in which the cleaning liquid is also sprayed onto the ink roller at the intermediate portion of the ink flow.

Further, the features of the present invention are: a spraying unit provided with a plurality of spraying nozzles arranged at intervals in the cylinder length direction of the ink roller; and a plurality of cleaning liquids are sprayed from the spraying nozzles in small amounts in accordance with an input cleaning program. It is composed of an injection control unit for injecting over multiple times.

[0017]

According to the present invention, after the printing is completed, the rotary press is operated in the cylinder-inserted state, and the cleaning liquid is jetted to the ink roller at the upstream portion of the ink flow. The ink on the surface layer of the ink roller is dissolved by spraying the cleaning liquid, and the dissolved ink stains are automatically transferred to the ink roller for the cylinder run operation.
It is sequentially transferred to the plate cylinder and blanket cylinder, and finally adsorbed on the running paper and removed. Since the spray is applied to the base of the ink flow, the amount of cleaning liquid can be small, and the cleaning time can be shortened accordingly.

Further, according to the present invention, the spraying of the cleaning liquid is performed a plurality of times by small amounts under electrical control, and the spraying amount is made efficient.

Further, according to the present invention, the rotary press is slowly operated, which allows simultaneous cleaning with the guide roller and the blanket cylinder.

Further, according to the present invention, the cleaning liquid is also sprayed on the intermediate portion of the ink flow, whereby the cleaning power is increased, and the ink easily generated on the satellite rotary press for color printing or the spot rotary press for monochromatic printing. It is possible to remove the persistent ink residue on the roller and Nappari.

Further, according to the present invention, the injection control section to which the cleaning program is input by the cleaning start operation is operated, the injection time, the injection timing, etc. are controlled, and the cleaning liquid is injected from the injection nozzle in small amounts a plurality of times. It is jetted and the ink on the surface of the ink roller is dissolved.

[0022]

1 to 5 show an embodiment of the present invention.
The rotary press 2 includes an ink roller group 4 from the lower side to the upper side, a watering roller 6, and a plate cylinder 8 and a blanket cylinder 10 on the upper side. In addition, the rotary press 2 includes an ink roller group 4
A cleaning device 12 for cleaning the is installed. Note that reference numerals 14 and 16 denote an ink tank and a water tank, respectively, and reference numeral 18 denotes a running paper.

The cleaning device 12 includes a jetting section 22 having a plurality of jetting nozzles 20 facing below the ink roller group 4.
The injection control unit 24 is configured to inject the cleaning liquid little by little from each of the injection nozzles 20 according to the input cleaning program.

The injection control section 24 includes a control board 26 for electrically controlling the injection time and injection timing of the cleaning solution, a cleaning solution supply means 28 for supplying a cleaning solution in response to a signal from the control board 26, and the cleaning solution supply means. 28 and an air source 30, and an open / close electromagnetic valve 32 for opening and closing the cleaning liquid and air in response to a signal from the control panel 26, and an operation panel 34 for starting and stopping the entire cleaning. ..

The control panel 26 is connected to the rotary press control panel 36 for controlling the rotary press 2 through an interlock circuit, and by simply pressing the operation button of the operation panel 34, the ink roller and the watering roller 6 can be pressed. The operation of putting on and putting on the body can be automatically performed. In the cleaning device 12, the solid line, the one-dot chain line, and the two-dot chain line indicate an air line, a signal line, and a cleaning liquid line, respectively. In addition,
In this example, the jetting unit 22 of the cleaning device 12 is set to jet the ink to the ink roller 4a, which is the origin of the upstream portion of the ink flow.

Next, the operation of the cleaning device 12 will be described. When the operation button on the operation panel 34 is pressed, the control panel 26
The cleaning liquid supply means 28 operates in accordance with the operation output of the program time chart of FIG. 3 which is set inside, and supplies the cleaning liquid to the opening / closing electromagnetic valve 32. Next, the opening / closing electromagnetic valve 32 is opened in accordance with the shutter open output of the program time chart, and the cleaning liquid sent from the cleaning liquid supply means 28 is supplied to the injection unit 22. By the air supply switching operation of the opening / closing electromagnetic valve 32, a shutter 64 (described later), which serves to prevent the ink mist from adhering to the ejection unit 22 and to prevent the dripping of the cleaning liquid, is driven by the air cylinder to open, and the cleaning liquid is ejected from the ejection nozzle 20. It becomes possible to inject.

The cleaning liquid supplied to the spraying unit 22 is spread on the ink roller 4a at a constant spraying angle by opening and closing an electromagnetic valve which is integrated with the spraying nozzle 20 according to the cleaning liquid spraying output of the program time chart. Is jetted.

Next, the entire cleaning procedure will be described with reference to FIG. The rotary press 2 is slowly operated while the printing operation is completed with the paper threaded (step 40). Prior to the start of cleaning, the amount of cleaning liquid corresponding to the degree of contamination of the ink roller is input to the control panel 26, and then the operation button of the operation panel 34 is pressed (steps 42 and 44). Next, a very small amount of cleaning liquid is sprayed from the spray nozzle 20 according to the program, and the ink roller group 4 and the watering roller 6 of the rotary press 2 are sprayed.
Is put on and put on the body (steps 46 and 48).
When the cylinder is inserted, the ink stains of the ink roller 4a dissolved by the cleaning liquid are sequentially transferred to the ink roller group 4, the plate cylinder 8 and the blanket cylinder 10, and finally absorbed and removed by the running paper 18. (Step 50). As soon as the dirt on the ink roller group 4 is removed, cylinder removal is performed (step 52).

The guide roller cleaning device and the blanket cleaning device may be started prior to the start of cleaning (step 41). There are some blanket cleaning devices that cannot be cleaned while in the cylinder. In this case, the blanket cleaning device is started after removing the cylinder (step 53).

As described above, by adopting a system in which the cleaning liquid is mechanically sprayed into the ink roller 4a at the upstream portion of the ink roller group 4 a plurality of times in small amounts, the amount of the cleaning liquid can be set without waste and cleaning can be performed. The time can be shortened, and the amount of the running paper 18 for cleaning can be reduced. As a result of the experiment, when cleaning at high speed, the cleaning time and the amount of cleaning liquid used are about 1
It was confirmed that the amount of running paper 18 (waste paper) used can be reduced to about 1/3 in addition to / 5.

Further, since the cleaning can be performed in the slow motion, the cleaning of the guide roller and the cleaning of the blanket cylinder can be performed at the same time, and thus the efficiency of the cleaning operation of the entire rotary press 2 can be improved. Especially, since the guide roller cleaning device uses the traveling paper 18 as in this example, it can be used together.
The running paper 18 can be used reasonably. Further, also in the cleaning of the blanket cylinder 10, when the ink roller cleaning according to the present example is performed, the cleaning liquid as well as the ink stains pass on the surface of the blanket cylinder 10, which has the advantage of increasing the cleaning action of the blanket cylinder 10.

The above-mentioned cleaning by the slow operation is performed at a cycle of 99.9 seconds by using the batch count output of the electronic timer, and the program time chart of FIG. 3 is repeated three times for a total of 299.7 seconds. It is a thing. In the program time chart of FIG. 3, the circle mark indicating the injection time point indicates the injection time of 0.1 seconds, and the black square mark indicates the injection time period of 0.2 seconds.

Next, the cleaning device 12 will be described with reference to FIGS.
The injection unit 22 will be specifically described. The ejection unit 22 is roughly configured by a base member 60 extending in the longitudinal direction of the ink roller 4a, and a plurality of ejection nozzles 20 attached to the base member 60 at intervals in the longitudinal direction.
A cleaning liquid supply pipe 62 is provided in the base member 60 so as to communicate with each of the injection nozzles 20, and the cleaning liquid introduced from the opening / closing electromagnetic valve 32 of the injection control unit 24 is supplied to each of the injection nozzles 2.
It can be supplied to 0.

Although not shown, the injection nozzle 20 is integrally provided with an electromagnetic valve that opens and closes in response to a signal from the control panel 26. Further, the base member 60 is provided with a shutter 64 for preventing ink mist from adhering and preventing the cleaning liquid from dripping, so that the shutter 64 can be driven by the air supplied from the air source 30 via the opening / closing electromagnetic valve 32. Is becoming During the cleaning, the ejection is allowed by retracting from the front surface of the ejection nozzle 20.

When cleaning persistent ink residues on ink rollers, such as satellite presses for color printing and spot presses for single-color printing, and so-called Nappari, etc., as shown in FIG. 4, the jetting unit 22 is added to the intermediate portion of 4, that is, the intermediate portion of the ink flow. As a result, the cleaning function is enhanced, and it becomes possible to remove nappari and the like. In addition, in order to deal with maintenance of the ink roller group 4 and the like, the ejecting portion 22 can be removed with one touch with respect to the mounting portion of the rotary press 2.

Further, in the cleaning device 12, a plurality of cleaning programs can be selected by the switch of the operation panel 34, and in order to deal with the degree of stains on the ink roller such as ink residue and nappari, each cleaning program can be selected. The amount of the cleaning liquid can be selected in several steps.

The various specific structures shown in the above examples are merely examples, and the design can be changed as appropriate within the range where the object can be achieved.

[0038]

According to the present invention, since the cleaning liquid is mechanically sprayed to the ink roller at the upstream portion of the ink flow, the amount of the cleaning liquid can be set without waste and the cleaning time can be shortened. The amount of running paper for cleaning can be reduced. Therefore, work efficiency can be improved and work cost can be reduced. In addition, it is possible to avoid the complexity and danger of manual work, and it is possible to wipe out dirty work such as cleaning of the doctor blade.

Further, the cleaning of the guide roller and the cleaning of the blanket cylinder can be carried out at the same time by the cleaning by the slow operation, so that the working efficiency of the entire rotary press can be improved.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of an ink roller cleaning method and apparatus according to the present invention.

FIG. 2 is a flowchart showing a cleaning procedure.

FIG. 3 is a program time chart showing injection time and injection timing.

FIG. 4 is a schematic side view of an injection nozzle.

FIG. 5 is a schematic side view of an injection unit.

FIG. 6 is a schematic diagram of a case where an ejection unit is also provided at an intermediate portion of an ink flow.

[Explanation of symbols]

 2 rotary press 4 ink roller group 4a ink roller 10 blanket cylinder 12 cleaning device 18 running paper 20 jet nozzle 22 jet unit 24 jet control unit

Claims (5)

[Claims] 1. After completion of printing, the rotary press is put into a cylinder-in operation state, and a cleaning liquid is jetted to the ink roller at the upstream side of the ink flow, which is the lower side of the ink roller group, to dissolve and dissolve the surface ink. Cleaning method for rotary press ink rollers, in which ink stains are sequentially transferred to the upper side where the blanket cylinder etc. are located and finally adsorbed to running paper. 2. The method for cleaning an ink roller of a rotary press according to claim 1, wherein the cleaning liquid is sprayed electrically a small number of times a plurality of times. 3. The method for cleaning an ink roller of a rotary press according to claim 1, wherein the rotary press is operated at a slow speed. 4. The method of cleaning an ink roller of a rotary press according to claim 1, 2 or 3, wherein the cleaning liquid is also sprayed on the ink roller at an intermediate portion of the ink flow. 5. A jetting unit provided with a plurality of jetting nozzles at intervals in the cylinder length direction of the ink roller, and a washing liquid is jetted little by little from the jetting nozzle a plurality of times in accordance with an inputted washing program. A rotary press ink roller cleaning device consisting of an injection control unit.