JP2009214363A - Apparatus for washing ink roller group - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing apparatus in which a washing liquid feeding pipe for discharging washing liquid and connected to a discharge nozzle tube is a single tube and which removing paper powder of an ink roller group or others by introducing microbubbles or nanobubbles into a washing liquid constituted by mixing a detergent with water. <P>SOLUTION: In the washing apparatus of the ink roller group (9) having the ink roller group (9) for transferring ink from an ink feeding section (6) to a printing plate (7), the discharge nozzle tube (22) constituted by boring a plurality of discharge holes (27) for discharging the washing liquid, a waste liquid recovering tray (23) having a doctor blade (29) coming into contact with the surface of an ink roller (12) and scraping down ink on the ink roller (12), a bubble generating unit (30) generating the microbubbles or the nanobubbles in the washing liquid by mixing the washing liquid constituted by mixing the detergent undiluted solution with the water in predetermined quantities into the flow of pressurized air is connected to a washing liquid feeding channel (21) for feeding the washing liquid to the discharge nozzle tube (22). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cleaning device for an ink roller group in a printing press, and more specifically, a bubble generator that improves the removal efficiency of dirt by containing microbubbles or nanobubbles in a cleaning liquid for cleaning the ink roller group. The present invention relates to a cleaning device for an ink roller group.

  The printing machine includes a number of ink rollers, and ink is sequentially supplied to the plate cylinder via a plurality of ink rollers arranged side by side from the ink fountain, and printing is performed on printing paper. The ink used for printing adheres in layers on the surface of the ink roller on the plate cylinder side, so it adheres to the ink roller group when the work of the day is completed or when the color of the ink is changed. It is necessary to wash off the ink.

  The work of removing the ink was performed by a worker wiping away the cleaning liquid from the top of the ink roller group with a waste cloth. However, there is a risk due to the complexity of manual work and the rotation of the ink roller during cleaning work. As described in 1, the cleaning liquid is sprayed toward the ink roller from the spray nozzle tube disposed at the top of the ink roller group for transferring the ink from the ink supply unit to the printing plate, and the stain on each ink roller is removed. An automatic cleaning apparatus for an ink roller group is used in which the cleaning waste liquid that has flown is scraped by a doctor blade in a waste liquid collection tray provided downstream.

Further, as a cleaning liquid spray nozzle tube used in a cleaning apparatus for an ink roller group, an apparatus described in Patent Document 2 in which spray nozzles of cleaning liquid and water are alternately arranged and sprayed onto an ink roll is known.
JP 2003-145723 A Japanese Patent No. 3329294

  In the cleaning device of Patent Document 1, when paper dust adheres to the ink roller group, it cannot be sufficiently removed only with a petroleum-based cleaning liquid, and a small amount of water is mixed into the cleaning liquid to remove the paper powder. . Because of this necessity, the nozzle for spraying water as in Patent Document 2 is provided separately from the nozzle for the cleaning liquid.

  However, since piping from the cleaning liquid pump to the cleaning liquid nozzle and piping from the water pump to the water nozzle are required, handling of multiple piping in a printing machine aiming for downsizing becomes an obstacle. Yes. In addition, although the control of the amount of cleaning liquid to be ejected and the amount of water is complicated, depending on the location of the nozzle ejected to the ink roller, a portion where only water or only the cleaning liquid is ejected is generated, which is the purpose. There was a problem that a portion where paper powder or ink was not sufficiently removed occurred.

  The present invention has been made in view of the above problems, and its object is to provide a single cleaning liquid supply pipe for supplying the cleaning liquid to the injection nozzle pipe for injecting the cleaning liquid toward the ink roller surface in the printing press. Another object of the present invention is to provide a cleaning apparatus for an ink roller group in which microbubbles or nanobubbles are contained in a cleaning liquid in which a cleaning agent and water are mixed to sufficiently remove paper dust or ink.

  Microbubbles usually mean that the diameter of bubbles is 50 μm or less, and nanobubbles means that the diameter of bubbles is 1 μm or less.

  In order to achieve the above object, the invention according to claim 1 is directed to a cleaning liquid containing microbubbles or nanobubbles in an ink roller group (9) for transferring ink from an ink supply section (6) to a printing plate (7). Sprayed and washed.

  According to a second aspect of the present invention, there is provided an ink roller group (9) for transferring ink from the ink supply section (6) to the printing plate (7), and a plurality of jets for jetting the cleaning liquid toward the surface of the ink roller (16). A waste liquid collection tray having a jet nozzle tube (22) having a hole (27) and a doctor blade (29) that contacts the surface of the ink roller (12) and scrapes off ink adhering to the ink roller (12). 23), and a cleaning liquid obtained by mixing a predetermined amount of a cleaning agent stock solution and water is mixed in a flow of pressure air to generate micro bubbles or nano bubbles in the cleaning liquid. The bubble generator (30) to be connected was connected to a cleaning liquid supply line (21) for supplying a cleaning liquid to the spray nozzle pipe (22).

  According to a third aspect of the present invention, the spray nozzle pipe (22) is connected to the cleaning liquid supply pipe (21), and an inner pipe (26) having a plurality of holes (27) formed on one side thereof, The outer tube (25) including the tube (26) and having the same number of holes (28) larger than the diameter of the hole (27) of the inner tube was formed on one side.

  In the invention according to claim 4, the bubble generator (30) includes a large-diameter portion inflow portion (34) through which pressurized air flows, a large-diameter portion outflow portion (35) through which cleaning liquid is ejected, and a central portion having a small-diameter portion. A room (39) having a main mixing section (31) forming (36) and a polygonal inner wall for mixing the cleaning agent from the cleaning agent stock solution storage tank (44) and the water from the water storage tank (45) And a sub-mixing part (32) comprising a part, and a part of the sub-mixing part (32) communicates with a communication path (40) facing the narrow diameter part (36) of the main mixing part (31). The vortex-like cleaning liquid generated in the sub-mixing part (32) is pressed from the communication path to the reduced-diameter part (36) of the main mixing part (31) and mixed with the pressurized air, and microbubbles or nanobubbles Is generated in the cleaning liquid and supplied to the pipe line (21) of the injection nozzle pipe (22) Was to so that.

  According to a fifth aspect of the present invention, the bubble generating device (30) optionally closes the cleaning agent inlet (37) and the water inlet (38) facing the sub-mixing section (32), thereby forming an ink roller ( 16) The components of the cleaning liquid to be sprayed were changed.

  According to the first aspect of the present invention, since the cleaning liquid containing microbubbles or nanobubbles is sprayed toward the ink roller group, the microbubbles or nanobubbles in the cleaning liquid are washed away between the continuous ink rollers. The air that is pressure-contacted and destroyed and becomes high pressure in the bubbles becomes a jet stream, and the ink layer and paper powder adhering to the surface of the ink roller are peeled off and washed.

  According to the second and third aspects of the invention, an inner tube having a plurality of holes, and an outer tube that surrounds the inner tube and has the same number of holes larger than the diameter of the inner tube. The cleaning liquid supply pipe for supplying the cleaning liquid to the spray nozzle pipe constituted by connecting a bubble generator for generating microbubbles or nanobubbles in the cleaning liquid obtained by mixing a predetermined amount of the cleaning agent stock solution and water, and in the bubble generating apparatus In this case, the cleaning liquid supply pipe to be supplied to the spray nozzle pipe can be a single pipe, and the piping around the printing press is easy and unobstructed. Further, the strength of the spray nozzle tube is increased by the outer tube of the spray nozzle tube, so that it is possible to prevent the cleaning liquid spray hole of the inner tube from being blocked against dirt such as dripping or dust.

  According to the invention of claim 4, when microbubbles or nanobubbles generated in the cleaning liquid and having an increased surface area are sprayed toward the surface of the ink roller, the cleaning agent that covers the surface of the bubbles has an increased surface area. Since the dirt component is removed by quickly diffusing over the entire surface of the ink roller, it is not necessary to keep supplying the cleaning liquid and the amount of the cleaning liquid used can be reduced.

  According to the fifth aspect of the present invention, the cleaning agent inlet and the water inlet facing the sub-mixing part in the bubble generator are optionally closed, so that the cleaning agent and water are mixed as the cleaning liquid depending on the condition of the ink roller. And the convenience of washing can be improved without increasing the number of pipes.

  Hereinafter, an embodiment of the present invention applied to a cleaning device for an ink roller group will be described with reference to the drawings.

  FIG. 1 is a schematic view of an ink supply device showing a configuration of a cleaning device for an ink roller group having a bubble generating device, and FIG. 2 is a schematic perspective view showing a connection between the cleaning device equipped with an ejection nozzle tube and the bubble generating device. 3 is a cross-sectional view taken along the line AA in FIG. 2, FIG. 4 is a cross-sectional view of the bubble generating device, FIG. 5 is a cross-sectional view of the sub-mixing section showing the BB cross section in FIG. FIG.

  The ink supply apparatus shown in FIG. 1 is equipped with an ink supply unit 6 comprising an ink base roller 3 that forms one side of the ink fountain 2, a calling roller 4 and a delivery roller 5, and a printing plate 7 from the ink supply unit 6. An ink roller group 9 is composed of a plurality of ink rollers that transfer ink to the plate cylinder 8.

  The ink fountain 2 is formed by a plurality of ink keys 10 arranged on the bottom surface, an ink base roller 3 and a pair of left and right ink cuffs (not shown) to form a substantially triangular ink fountain 2, in which ink 11 is stored. Yes. The ink 11 of the ink fountain 2 is attached to the outer peripheral surface of the ink base roller 3 that rotates from the end of the ink key 10 and passes through the calling roller 4 that contacts and separates from the ink base roller 3 at a predetermined timing. It is handed over to.

  A pair of ink form rollers 13 (four in the figure), which are supported by arms on the pair of swing rollers 12 by arms (not shown), are detachably mounted on the peripheral surface of the plate cylinder 8. The three kneading rollers 14 are provided in contact with each other.

  The ink 11 delivered to the delivery roller 5 is kneaded while the transfer roller 12 and the kneading roller 14 constituting the ink roller group 9 are sequentially transferred, so that the ink 11 can be brought into contact with and separated from the peripheral surface of the plate cylinder 8. Then, the ink is applied to the printing plate on the surface of the plate cylinder 8 from the inking roller 13 and further transferred to the blanket cylinder 15 as a pattern. Then, it is transferred to paper supplied between an impression cylinder (not shown) and the blanket cylinder 15, and printing is completed.

  A jet nozzle tube 22 shown in FIG. 2 connected to a bubble generator 30 (described later) by a cleaning liquid supply tube 21 is disposed in the vicinity of the delivery roller 5 of the ink supply unit 6. A waste liquid recovery tray 23 is provided for recovering the cleaning waste liquid from which the cleaning liquid ejected from the ejection nozzle tube 22 has sequentially transferred the ink roller group 9.

  2 and 3 are held at both ends in holding holes provided in brackets 24a and 24b fixed to the frames of the left and right printing presses with bolts or the like. One end of the injection nozzle tube 22 is connected to the bubble generator 30 via the cleaning liquid supply tube 21.

  The injection nozzle tube 22 includes, for example, a single or single outer tube 25 made of a brass hollow round bar having an inner diameter of 8 mm, and a single or single inner tube 26 made of a brass hollow round bar having an inner diameter of 6 mm. One end of the inner pipe 26 is connected to the cleaning liquid supply pipe 21 and the other end is closed.

  On the other hand, the outer tube 24 is open at both ends, and has a large diameter larger than the pore 27 of the inner tube 26 corresponding to the pore 27 at the same interval as the pore 27 of the inner tube 26 on one side in the axial direction. The same number of holes 28 as the small holes 27 are formed, and are aligned axially on one side of the outer tube 24.

  The connection between the inner pipe 26 and the cleaning liquid supply pipe 21 is not limited to one end of the inner pipe 26 shown in FIG. 2, but is connected from both ends of the inner pipe 26 so that the cleaning liquid flows into the inner pipe 26. Alternatively, a connecting pipe may be provided and connected to the central portion of the inner pipe 26 so as to flow in the left-right direction from the center. Further, although the connection between the inner pipe 26 and the cleaning liquid supply pipe 21 is not shown, it can be easily connected by using a one-touch joint.

  The waste liquid collection tray 23 has a boat shape, and a doctor blade 29 is disposed on one side thereof so that the waste liquid collection tray 23 can move in the horizontal direction so as to be able to contact and separate from the swing roller 12. Although the doctor blade 29 and the swing roller 12 are separated during printing, the waste liquid on the roller surface is collected by the doctor blade 29 that is in contact with the surface of the swing roller 12 when the ink roller group 9 is cleaned.

  A bubble generator 30 for pumping the cleaning liquid shown in FIGS. 4 and 5 to the spray nozzle pipe 22 via the cleaning liquid supply pipe 21 is composed of a main mixing section 31 and a sub-mixing section 32.

  The main mixing section 31 includes an inflow section 34 having a large diameter portion through which pressurized air supplied from a compressor 33 that is a supply source of pressurized air flows, and an outflow section 35 having a large diameter section through which cleaning liquid is pumped to the cleaning liquid supply pipe 21. And a narrow-diameter portion 36 between the inflow portion 34 and the outflow portion 35.

  The sub-mixing unit 32 includes a first inlet 37 into which the cleaning agent from the storage tank 44 that stores the cleaning agent stock solution flows, a second inlet 38 into which distilled water from the distilled water storage tank 45 flows, The room 39 has an inner wall formed in a polygonal shape that mixes the two, and the illustrated example shows the most polygonal circle.

  A part of the chamber 39 of the sub-mixing portion 32 is communicated with a communication passage 40 facing the narrow-diameter portion 36 of the main mixing chamber 31. In addition, check valves 41, 42, and 43 that allow flow in only one direction are disposed in the inflow portion 34, the first inflow port 37, and the second inflow port 38.

  As shown in FIG. 6, the inflow section 34 of the main mixing section is connected to the solenoid valve 47 from the air source 33 through the regulator 46 by piping, and the outlet 35 of the main mixing section 31 faces the ink roller group 9. Are connected by an ejection nozzle tube 22 and a cleaning liquid supply tube 21.

  The first liquid inlet 37 of the sub-mixing unit 32 is connected via a solenoid valve 48 that adjusts the flow rate of the tank 44 storing the organic solvent liquid (cleaning agent stock solution), and the second liquid inlet 37 is connected to the second liquid inlet 37. The liquid inlet 38 is connected to a tank 45 that stores water via a solenoid valve 49 that adjusts the flow rate. The operation of the solenoid valves 47, 48 and 49 is controlled by a controller 50 which is a control means in the control box.

  The operation of the cleaning device for the ink roller group having the above configuration will be described.

  When it is necessary to clean the surface of the ink roller group 9, a predetermined amount of the cleaning agent from the storage tank 44 for storing the cleaning agent stock solution is supplied to the sub-mixing unit 32 of the bubble generator 30 according to a command from the controller 50. The predetermined amount of water from the water storage tank 45 is pumped into the chamber 39 from the second inlet 38 of the sub-mixing unit 32. At the same time, the compressed air supplied from the compressor 33 passes through the main mixing portion 31 while being squeezed by the small diameter portion 36 and flows to the outflow portion 35.

  The cleaning agent and water that have entered the room 39 of the sub-mixing unit 32 collide with the inner wall formed in the polygon of the room 39 to generate a vortex, and both of them become a sufficiently agitated and mixed cleaning liquid. Microbubbles that are sucked into the reduced-diameter portion 36 of the main mixing portion 31 and sent into the narrow-diameter portion 36 by the eddy current pressing force of the cleaning liquid itself and mixed with the pressure air to reduce the diameter in the cleaning liquid or The nanobubbles are pumped from the outflow part 35 toward the cleaning liquid supply pipe 21 while being uniformly distributed.

  The cleaning liquid containing micro bubbles or nano bubbles fed to the cleaning liquid supply pipe 21 ejects the cleaning liquid from the pores 27 formed in the inner pipe 25 of the ejection nozzle pipe 22 toward the ink roller group 9.

  The cleaning liquid sprayed onto the ink roller 16 at the top of the ink roller group 9 passes through the transfer roller 5, the swing roller 12, and the kneading roller 14, and stains the ink roller on the swing roller 12. It is scraped off by the blade 28. At this time, the bubbles in the cleaning liquid are destroyed by pressure when they are kneaded and pushed between the ink rollers, and the high pressure air in the bubbles becomes a jet flow, and the ink adhering to the surface of the ink rollers The layer and paper dust are peeled off and washed.

  Since the cleaning liquid supply pipe 21 up to the jet nozzle pipe 22 after the bubble generator 30 is pumped in a state where the cleaning agent and water are mixed, the number of pipes may be one, and the pipes around the printing press It is easy to handle and does not get in the way.

  When the ink roller group 9 is stained only with ink, the second inlet 38 of the sub-mixing unit 32 of the bubble generating device 30 connected to the water tank 45 is closed, and the first inlet connected to the cleaning agent tank 44 is closed. The cleaning agent from the inflow port 37 is pumped into the room 39, and the cleaning liquid containing microbubbles or nanobubbles by the pressure air becomes a liquid containing only the cleaning agent not containing water.

  When it is desired to wash the ink roller group 9 with water, the second inlet connected to the water tank 45 is closed by closing the first inlet 37 of the sub-mixing unit 32 of the bubble generating device 30 connected to the cleaning agent tank 44. Water is pumped into the chamber 39 from the inflow port 38, and the cleaning liquid containing microbubbles or nanobubbles by the pressure air can be made into water-only liquid that does not contain a cleaning agent, and is an extra for changing the components of the cleaning liquid Does not require any special equipment.

The figure which shows one Embodiment of the washing | cleaning apparatus of the ink roller group which has the bubble generator by this invention. The schematic perspective view which showed the connection of the washing | cleaning apparatus equipped with the injection nozzle pipe | tube, and a bubble generator. AA sectional drawing in FIG. Sectional drawing of a bubble generator. Sectional drawing of the submixing part which shows the BB cross section in FIG. The block diagram of a bubble generator.

Explanation of symbols

6 ... Ink supply section 8 ... Impression cylinder 9 ... Ink roller group 21 ... Cleaning liquid supply pipe 22 ... Jet nozzle pipe 23 ... Waste liquid collection tray 25 ... Outer pipe 26 ... Inner tube 27: Fine pore 30 ... Bubble generator 31 ... Main mixing part 32 ... Sub-mixing part 34 ... Inflow part 35 ... Outflow part 37 ... First flow Entrance 38 ... Second inlet 39 ... Room 40 ... Communication passage

Claims (4)

A cleaning apparatus for an ink roller group, wherein a cleaning liquid containing microbubbles or nanobubbles is sprayed and cleaned on an ink roller group for transferring ink from an ink supply unit to a printing plate. An ink roller group for transferring ink from the ink supply unit to the printing plate, an injection nozzle tube having a plurality of injection holes for injecting cleaning liquid toward the ink roller surface, and abutting on the surface of the ink roller and adhering to the ink roller In a cleaning device for an ink roller group having a doctor blade with a doctor blade for scraping off the ink, a cleaning liquid prepared by mixing a predetermined amount of cleaning agent and water into a flow of pressure air is mixed into a microbubble. Alternatively, a cleaning device for an ink roller group, wherein a bubble generating device for generating nanobubbles in the cleaning liquid is connected to a cleaning liquid supply pipe for supplying the cleaning liquid to the ejection nozzle tube. The spray nozzle pipe is connected to the cleaning liquid supply pipe, and an inner pipe having a plurality of holes formed on one side thereof and an equal number of holes including the inner pipe and having a diameter larger than that of the inner pipe are formed on one side. 3. The cleaning apparatus for an ink roller group according to claim 2, wherein the cleaning apparatus comprises an outer tube provided. The bubble generating device includes an inflow portion of a large diameter portion through which pressurized air flows, an outflow portion of a large diameter portion from which cleaning liquid is ejected, a main mixing portion in which a central portion forms a small diameter portion, and a cleaning agent from a cleaning agent stock solution storage tank And a sub-mixing part having a chamber having a polygonal inner wall for mixing water from the water storage tank, and a part of the sub-mixing part faces the narrow diameter part of the main mixing part The vortex-like cleaning liquid generated in the sub-mixing section is pressed from the communication path to the reduced-diameter portion of the main mixing section and mixed with the pressurized air to generate microbubbles or nanobubbles in the cleaning liquid. 3. An ink roller group cleaning apparatus according to claim 2, wherein the ink roller is jetted to be supplied to a pipe line of the jet nozzle pipe.

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