JP2005186405A - Washing waste liquid sucking method and washing waste liquid sucking controlling system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the running cost of a washing waste liquid sucking device and increase the sucking efficiency of a washing waste liquid. <P>SOLUTION: In a washing waste liquid sucking controlling system 10, a plurality of cylinder washing devices 14 installed on a printing machine are divided into washing device groups in group unit so as to group-wise changeably connect every washing device group through opening and closing valves 32 to a single washing waste liquid sucking device 16. The sucking of the washing waste liquid of the washing device 14 is made changeably controlled to suck every washing device group in an arbitrarily set order. In this case, the washing of the printing machine may be performed by sucking the washing waste liquid only from some washing device group, while the sucking of the remaining washing device group may be performed after the washing of the printing machine. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cleaning waste liquid suction method and a cleaning waste liquid suction control system, and more particularly to a cleaning waste liquid suction method and a cleaning waste liquid suction control system for efficiently recovering cleaning waste liquid of a cleaning device of a printing press.

  Blanket cylinders, ink rollers, etc. of printing machines need to be washed because paper dust and ink stick to the roller surface during printing. At that time, the cleaning waste liquid discharged by scrubbing the brush with the cleaning liquid stays in the cleaning apparatus. Therefore, it is necessary to periodically remove this cleaning waste liquid to the outside.

  There is a method of discharging the cleaning waste liquid to the outside of the cleaning device by dropping it naturally with a hose from the waste solution receiver of the cleaning device, collecting it in a pail can, etc., and discarding it when the inside of the can is full. In addition, there is a method in which hoses from waste liquid receivers of a plurality of cleaning devices are introduced into one pipe and connected to a waste liquid tank while flowing down while being inclined.

  Patent Document 1 discloses a conventional forced suction device for waste liquid. In Patent Document 1, a waste liquid receiver of a cleaning device and a cyclone are connected by a hose, a blower is connected to the cyclone, and the waste liquid is forcibly sucked by the blower. As a result, maintenance such as cleaning in the cleaning device and treatment of waste liquid accumulated in the container is greatly improved, labor of workers involved in printing can be reduced, and performance of the device can be maintained.

Particularly in a newspaper printing factory, the number of cylinders to be cleaned in one set of printing presses is 25 to 28. FIG. 6 shows an example of a waste liquid suction system in such a printing factory. A cleaning device 2 is installed in each cylinder 1 to be printed. As a conventional cleaning device 2, there is a device that supplies cleaning liquid to a brush belt or a brush roller and scrapes paper dust or the like on a cylinder surface. Each cleaning device 2 is connected to the forced suction device 3 through a waste liquid hose. The forced suction device 3 sucks the cleaning waste liquid stored in the cleaning device 2 and discharges it to the terminal collection tank 4. As the cleaning liquid uses water in addition to the organic solvent, the amount of waste liquid increases. Therefore, for example, in the case of the forced suction device 3 using a blower of 11 kW as the electric capacity for the 26 cleaning devices 2 in the printing press, the forced suction device 3 is used to suck the waste liquid of the cleaning device 2. A stand is installed. That is, 8 to 9 cleaning devices 2 are assigned to one forced suction device 3, and the waste liquid of all the cleaning devices 2 is simultaneously collected by the three forced suction devices 3 during cleaning.
JP 54-123784 A

  The forced suction device disclosed in Patent Document 1 must determine the specifications of the forced suction device such as the cyclone capacity and the blower electric capacity in consideration of the expected amount of processing waste liquid, suction time, etc. I must. However, when the amount of waste liquid treatment increases, the size of the suction device increases, and the blower also has to increase the electric capacity. Therefore, the shape of the whole suction device becomes large, and there is a problem that a sufficient installation space cannot be secured in a factory or the like without a large installation area.

  In the future, the number of cylinders to be cleaned will increase as the number of printed pages increases. In the conventional waste liquid suction system shown in FIG. 6, the number of forced suction devices 3 to be installed must be increased, or a forced suction device having a large suction capability must be installed. Therefore, the space for installing the forced suction device 3 increases or the electric capacity of the blower also increases. Moreover, not only the increase in the number of cylinders to be cleaned but also a decrease in suction efficiency due to changes in the type and shape of the cleaning waste liquid discharge port of the cleaning device 2 are factors that increase the number of forced suction devices 3 installed. .

  An object of the present invention is to improve the drawbacks of the prior art described above, and to provide a cleaning waste liquid suction method and a cleaning waste liquid suction control system capable of suctioning waste liquid discharged from the cleaning apparatus during cleaning of the printing press while suppressing the operating cost of the suction apparatus. Is to provide.

  In order to achieve the above object, a cleaning waste liquid suction method according to the present invention includes a plurality of cylinder cleaning means installed in a printing machine divided into groups, and cleaning discharged while performing cylinder cleaning of the printing machine. A cleaning waste liquid suction method for sucking waste liquid with a single cleaning waste liquid suction means, wherein the suction is performed by switching control in an arbitrarily set order for each group unit.

  Also, a cleaning waste liquid suction method in which a plurality of cylinder cleaning means installed in a printing machine are divided into groups, and the cleaning waste liquid discharged while performing cylinder cleaning of the printing machine is sucked by a single cleaning waste liquid suction means In this case, a part of the group units is sucked during the cleaning of the printing press, and the remaining group units are switched and controlled after the cleaning of the printing press for continuous suction.

  Further, a cleaning waste liquid suction method in which a plurality of cleaning means for cylinders installed in the printing press are divided into groups, and the cleaning waste liquid discharged while performing cylinder cleaning of the printing press is sucked by a single cleaning waste liquid suction means In the printing machine, all the group units are switched and controlled in an arbitrarily set order to perform suction.

  Further, the cleaning waste liquid suction control system according to the present invention divides a plurality of cylinder cleaning means installed in the printing press into a group of cleaning device groups, and the cleaning device group is grouped into a single unit via an opening / closing means. The cleaning waste liquid suction means is connected so as to be switchable, and includes a switching control means for sucking the cleaning waste liquid in an arbitrarily set order for each of the cleaning device groups.

Furthermore, a plurality of cleaning means are connected to a single cleaning waste liquid suction means attached to a plurality of cleaning means for cylinders installed in the printing press through an opening / closing means, and the cleaning waste liquid suction device is configured according to the suction capacity of the cleaning waste liquid suction device. A switching control means for sucking the cleaning waste liquid in the order set arbitrarily for each cleaning apparatus is provided.
In this case, the opening / closing means may be provided with an ejector-type suction part that sucks the cleaning waste liquid stored in the cleaning means.

  The cleaning waste liquid suction method and cleaning waste liquid suction control system according to the present invention realizes the optimal suction efficiency of the plurality of cylinder cleaning means in consideration of the suction capacity of the suction device according to the number, shape, specifications, etc. of the cleaning device. They are divided into groups of cleaning devices so that they can be grouped. This cleaning device group is connected to a single cleaning waste liquid suction means, and the cleaning waste liquid is switched and sucked in the order arbitrarily set for each cleaning device group. Therefore, the waste liquid of the cleaning device can be sucked sequentially for each group without sucking all of them simultaneously.

  Thereby, it is not necessary to use a plurality of cleaning waste liquid suction devices. Therefore, it is possible to forcibly collect the waste liquid from all the cleaning devices with the minimum cost performance. That is, the suction device to be used may be small, and the installation space can be minimized.

  In the suction method, a part of the group unit divided during the cleaning of the printing press is sucked, and the remaining cleaning means is sucked after the printing press is cleaned. As a result, the same effect as described above can be obtained, and the suction of the remaining cleaning device group can be performed in a short time because it is already stored in the waste liquid tray during the cleaning of the printing press. Further, during cleaning of the printing press, the cleaning device group is switched and controlled in an arbitrarily set order for suction. Thereby, suction of a wide range of cleaning devices can be performed during cleaning.

  Further, by installing the opening / closing means in the cleaning means, it is possible to suck only the cleaning device to be sucked without sucking each grouped cleaning device group. Further, by installing a suction unit in the cleaning means and performing switching control, it is possible to perform suction control only on the cleaning device to be suctioned without controlling the cleaning device group in units of groups.

Hereinafter, specific embodiments of a cleaning waste liquid suction method and a cleaning waste liquid suction control system according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a conceptual diagram of a cleaning waste liquid suction control system according to the present embodiment. FIG. 2 is a conceptual diagram of the configuration of the cleaning apparatus. FIG. 3 is a conceptual diagram of the configuration of the cleaning waste liquid suction device.

  As shown in FIG. 1, in the cleaning waste liquid suction control system 10, cleaning devices 14 are respectively disposed on a plurality of blanket cylinders 12 to be cleaned by the printing press. One end of a waste liquid discharge hose 28 is connected to a waste liquid tray 26 described later in these cleaning devices 14, and the other end is connected to a discharge pipe 30. Each cleaning device 14 is divided into a plurality of groups. In the present embodiment, 13 cleaning devices 14 are divided into cleaning device group A and cleaning device group B in groups. A flexible tube 34 is connected to the central portion of the discharge tube 30, and the other end is connected to the cleaning waste liquid suction device 16. The cleaning waste liquid suction device 16 sucks the cleaning waste liquid of each cleaning device 14 and discharges it to the cleaning waste liquid recovery tank 38 connected to the end. The discharge pipe 30 is provided with an opening / closing valve 32a for the cleaning device group A and an opening / closing valve 32b for the cleaning device group B, which are opening / closing means, on both sides of the connection port of the flexible tube 34. The cleaning waste liquid suction device 16 has a cyclone mechanism described later.

  As shown in FIG. 2, in the cleaning device 14 as a cleaning means, the brush roller 20 is arranged in parallel with the blanket cylinder 12 to be cleaned. The cleaning device 14 advances and retreats as indicated by an arrow “a” with respect to the blanket cylinder, and is disposed so as to be detachable from the blanket cylinder 12. The brush roller 20 contacts the blanket cylinder 12 at the time of cleaning, and retracts to a predetermined retreat position after cleaning. The cleaning liquid spray nozzle 18 of the cleaning device 14 is directed to the brush roller 20, and supplies the cleaning liquid directly to the brush roller 20. The brush roller 20 rotates in the direction of arrow b, and the tip of the brush comes into contact with the surface of the blanket cylinder 12 rotating in the c direction, and the dirt floating on the surface of the blanket cylinder 12 is transferred to the brush roller 20 side. The dirt adhering to the brush roller 20 is dropped together with the cleaning liquid onto a waste liquid tray 26 disposed under the cleaning device 14 by the scraper 24. The waste liquid tray 26 collects the cleaning waste liquid and can store a certain amount of the cleaning waste liquid. Further, a connection port 27 for connecting a waste liquid discharge hose 28 for discharging cleaning waste liquid is formed on the bottom surface of the waste liquid tray 26.

  The waste liquid discharge hose 28 connected to the connection port 27 can discharge the cleaning waste liquid stored in the waste liquid tray 26 to the outside. The waste liquid discharge hose 28 has an end connected to each cleaning device 14 and the other end connected so as to converge to one discharge pipe 30 serving as a main pipe. Next, the plurality of cleaning devices 14 are classified into cleaning device groups that can realize the optimal suction efficiency in consideration of the suction capability of the suction device. A flexible tube 34 branches off at an intermediate portion of the discharge tube 30 to which the cleaning device groups A and B are connected. One end of the flexible tube 34 is connected to the cyclone portion 36 of the cleaning waste liquid suction device 16. In this embodiment, the waste liquid discharge hose 28 is connected to one discharge pipe 30 so as to converge. However, the number of the discharge pipes 30 is not limited to this, and a plurality of discharge pipes 30 are provided for each cleaning device group. You may arrange.

  As shown in FIG. 3, the cleaning waste liquid suction device 16 serving as a cleaning waste liquid suction means includes a cyclone section 36 and a blower section 40 for separating and recovering the cleaning waste liquid. In the cyclone section 36, a gas-liquid mixture of the air in the waste liquid tray 26 and the cleaning waste liquid flows from the tangential direction of the upper part of the cylinder. The mixture is gas-liquid separated while swirling in the circumferential direction inside the cyclone. The separated cleaning waste liquid is stored in the lower liquid collection tank 42. On the other hand, the air is discharged to the outside by the blower section 40 from the outlet pipe 44 installed at the center inside the cyclone. Further, the cleaning waste liquid stored in the liquid collecting tank 42 is pumped to the external cleaning waste liquid recovery tank 38 by the waste liquid pump 46.

  The same number of opening / closing valves 32 as the opening / closing means are provided in the vicinity of the connection port of the flexible tube 34 that branches into the discharge tube 30. The opening / closing valve 32 is installed on the discharge pipe 30 connected to each cleaning device group, and the discharge flow path can be switched in units of the cleaning device group. The opening / closing valve 32 is connected to a control unit 48 serving as switching control means. The control unit 48 controls the operation of the opening / closing valve 32 to perform the suction operation or stop by switching in the order arbitrarily set for each cleaning device group for sucking the waste liquid. As the valve, for example, an automatic pinch valve or a pneumatically driven ball valve that is controlled to open and close by an air pressure by an electromagnetic valve, or an electrically driven ball valve that is controlled to open and close by an electric signal can be used. Further, the control unit 48 is also connected to the cleaning waste liquid suction device 16 to control cleaning waste liquid suction.

  With such a configuration, the cleaning waste liquid suction method of the cleaning waste liquid suction control system 10 is performed as follows. If printing is performed for a long time, paper dust, ink, etc. will adhere to a cylinder such as a blanket cylinder, resulting in unclear printing. Therefore, the printer needs to clean the cylinder after printing a certain number of sheets.

  First, after the printing operation of the printing press is completed, the cleaning operation of the blanket cylinder 12 is started. Cleaning of the blanket cylinder 12 is performed by spraying the cleaning liquid from the cleaning liquid spray nozzle 18 and supplying it to the brush roller 20, and pressing the brush roller 20 against the blanket cylinder 12 for cleaning. The dirt on the surface of the brush roller 20 is scraped off by the scraper 24 and stored in a waste liquid tray 26 installed in the lower part of the cleaning device 14 together with the cleaning liquid. On the other hand, the control unit 48 operates the blower unit 40 of the cleaning waste liquid suction device 16 to suck the discharge path of the cleaning waste liquid.

  Next, the control unit 48 becomes an object to be suctioned by the printing press when the cleaning valves A and B of the cleaning device group A or B that are closed in advance are arbitrarily set, for example, in this embodiment, when the cylinder cleaning is started. Open / close valve 32a of cleaning device group A is opened. As the opening / closing valve 32a is opened, the cleaning waste liquid of the cleaning device 14 disposed in the cleaning device group A is forcibly sucked. The suction of the cleaning device group A is continuously performed until the cleaning of the printing press is completed. After the cleaning of the printing press is completed and the cleaning waste liquid of the cleaning device 14 belonging to the cleaning device group A is sucked, the control unit 48 closes the open / close valve 32a, opens the open / close valve 32b, and then performs cleaning. The cleaning waste liquid stored in the cleaning device 14 belonging to the device group B is sucked. In the cleaning device 14 of the cleaning device group B, the cleaning waste liquid discharged during the cleaning operation is already stored in the waste liquid tray 26. Therefore, since the cleaning device group B sucks the cleaning waste liquid stored in advance, it can be sucked in a short time. Further, even if the printing operation is started after the cleaning operation of the printing press is completed, the cleaning device 14 is retracted to the retracted position, so that the cleaning waste liquid can be sucked without causing any trouble in the printing operation. it can.

  Thereby, even if the number of cylinders to be cleaned and the type and shape of the cleaning device are changed, all the cleaning waste liquid can be sucked by installing only one cleaning waste liquid suction device 16.

  FIG. 4 is a diagram showing a piping configuration of the waste liquid suction control system. As shown in FIGS. 4 (1) to (3), the piping path for the cleaning waste liquid is divided into a plurality of cleaning device groups in consideration of the suction efficiency of the suction device 16 (depending on the number of cylinders, the type and shape of the cleaning device, etc.). Sort. In the present embodiment, nine cleaning devices 14 are defined as one group of cleaning devices, and the cleaning device group divided into groups 2 to 4 will be described. In the cleaning device group, an opening / closing valve 32 is arranged in the discharge pipe for each group.

  A cleaning waste liquid suction method having the above-described configuration will be described with reference to the piping configuration of FIG. In the cleaning operation of the printing press, the first cleaning device group opening / closing valve 32e, which is arbitrarily set, is opened, and the waste liquid of the plurality of cleaning devices 14 is sucked simultaneously. During this time, the opening and closing valves 32f and g of the second and third cleaning device groups are closed.

  Next, after the suction of the first cleaning device group is completed, the opening / closing valve 32e is closed. With the open / close valve 32g of the third cleaning device group closed, the open / close valve 32f of the second cleaning device group is opened to start suction of the cleaning waste liquid. Hereinafter, the same operation is performed for the third cleaning device group. Note that while the one cleaning device group is being suctioned, the other cleaning device group is closed by the opening / closing valve 32, so that cleaning waste liquid is stored. Therefore, when the remaining cleaning device group is sucked, the cleaning waste liquid can be sucked in a short time.

  Further, the suction of the cleaning waste liquid can be performed even after the blanket cylinder 12 is cleaned. Even when the next printing is started on the printing press side, the cleaning device 14 has already moved back to the retracted position, so that the suction operation can be performed without any problem in printing. Even during printing, the waste liquid in the cleaning device 14 is only sucked, and the waste liquid can be collected in a short time without extending the cleaning time of the printing press. Thereby, the installation space of the cleaning waste liquid suction device 16 and the electrical capacity of the blower can be reduced, and the cleaning waste liquid can be efficiently suctioned.

Further, in the cleaning waste liquid suction method, during the cleaning operation of the printing press, switching control may be performed in an arbitrarily set order so that the grouped cleaning device group is repeatedly suctioned a plurality of times in a short time.
A plurality of opening / closing valves 32 may be provided for each cleaning device 14. In this case, there is no need to divide the plurality of cleaning devices 14 into groups. The cleaning waste liquid suction method can be controlled by arbitrarily selecting the cleaning device 14 to be suctioned according to the suction capability of the cleaning waste liquid suction device.

  Further, as shown in FIG. 5, an ejector-type suction portion may be installed in the waste liquid discharge hose 28 connected to the waste liquid tray 26 of the cleaning device 14 as a cleaning waste liquid opening / closing means. A discharge port 50 is formed on the bottom surface of the waste liquid tray 26, and an ejector 52 is provided as a suction means. An air supply pipe 54 is connected to the ejector 52. The ejector 52 can supply compressed air to the inside, generate a negative pressure at the discharge port 50, and discharge the cleaning waste liquid stored in the waste liquid tray 26 to the outside. The ejector 52 is connected to a control unit (not shown). This controller can control the suction of the cleaning waste liquid for each of the plurality of cleaning devices 14.

It is a lineblock diagram of the cleaning waste fluid suction control system concerning this embodiment. It is a composition conceptual diagram of a washing device. It is a conceptual diagram of the configuration of the cleaning waste liquid suction device. It is a figure which shows the piping form of a waste-liquid suction control system. It is a figure which shows the suction means of a washing | cleaning apparatus. It is a figure which shows the outline of the conventional waste liquid suction system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Cylinder, 2 ......... Cleaning device, 3 ......... Forced suction device, 4 ......... Recovery tank, 10 ...... Cleaning waste liquid suction control system, 12 ...... Blanket cylinder, 14 ......... Cleaning Apparatus, 16 ......... Washing liquid suction device, 18 ... Washing liquid injection nozzle, 20 ......... Brush roller, 24 ...... Scraper, 26 ......... Waste liquid tray, 27 ...... Connection port, 28 ......... Waste liquid discharge hose, 30 ......... Drain pipe, 32 ......... Open / close valve, 34 ......... Flexible pipe, 36 ......... Cyclone section, 38 ......... Washing waste liquid recovery tank, 40 ......... Blower section , 42 ......... Liquid collection tank, 44 ... ... Lead-out pipe, 46 ... ... Waste liquid pump, 48 ... ... Control section, 50 ... ... Discharge port, 52 ... ... Ejector, 54 ... ... Air supply pipe .

Claims (6)

  This is a cleaning waste liquid suction method in which a plurality of cleaning means for cylinders installed in a printing press are divided into groups, and cleaning waste liquid discharged while performing cylinder cleaning of the printing press is sucked by a single cleaning waste liquid suction means. A cleaning waste liquid suction method, wherein the suction is performed by switching control in an order arbitrarily set for each group unit.   This is a cleaning waste liquid suction method in which a plurality of cleaning means for cylinders installed in a printing press are divided into groups, and cleaning waste liquid discharged while performing cylinder cleaning of the printing press is sucked by a single cleaning waste liquid suction means. A cleaning waste liquid suction method, wherein a part of the group units is sucked during cleaning of the printing press, and the remaining group units are continuously controlled by switching control after cleaning of the printing press.   This is a cleaning waste liquid suction method in which a plurality of cleaning means for cylinders installed in a printing press are divided into groups, and cleaning waste liquid discharged while performing cylinder cleaning of the printing press is sucked by a single cleaning waste liquid suction means. A cleaning waste liquid suction method for performing suction control by switching and controlling all the group units in an arbitrarily set order during cleaning of a printing press.   A plurality of cylinder cleaning means installed in the printing press is divided into groups of cleaning device groups, and the cleaning device groups are connected to each group so as to be switchable to a single cleaning waste liquid suction means via an opening / closing means. A cleaning waste liquid suction control system comprising switching control means for sucking cleaning waste liquid in an order arbitrarily set for each cleaning device group.   A plurality of cleaning means are connected to a single cleaning waste liquid suction means attached to a plurality of cleaning means for cylinders installed in a printing machine via an opening / closing means, and the cleaning apparatus is adapted according to the suction capability of the cleaning waste liquid suction apparatus. A cleaning waste liquid suction control system comprising switching control means for sucking cleaning waste liquid in an arbitrarily set order every time. 6. The cleaning waste liquid suction control system according to claim 5, wherein the opening / closing means includes an ejector-type suction unit that sucks cleaning waste liquid stored in the cleaning means.

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