JP2011093262A - Method for circulating and supplying cleaning liquid for printer roller, and cleaning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for decreasing running cost required for cleaning the outer peripheral surface of a printer roller and a treating waste liquid generated by the cleaning at a low environmental load. <P>SOLUTION: The method for circulating and supplying a cleaning liquid is carried out by sequentially repeating a recovery process (step 1) for recovering the waste liquid generated by cleaning the outer peripheral surface of the printer roller by one or more printing companies by a cleaning liquid maker from the one or more printing companies; a regeneration process (step 2) for applying regeneration treatment to the waste liquid recovered in the recovery process by the cleaning liquid maker to eliminate ink soil from the waste liquid to acquire a regenerated liquid; and a supply process (step 3) for supplying the regenerated liquid acquired in the regeneration process to the one or more printing companies by the cleaning liquid maker. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides, for example, a cleaning liquid for cleaning the outer peripheral surface of a roller for a printing press such as a blanket cylinder, a cooling cylinder, and an impression cylinder constituting an offset printing machine to a printing company using the offset printing machine. The present invention relates to a method of circulating supply by a cleaning liquid maker and the like and a cleaning device that can be used when the method is carried out.

  FIG. 6 is a schematic view showing an example of a conventionally known offset printing machine. The strip-shaped paper 1 fed out from a paper feeding unit (not shown) passes through four printing units 3 and 3 constituting the printing unit 2 to be printed on four colors on the front and back surfaces, and then the ink Are sequentially passed through a drying section 4 for drying the sheet and a cooling section 5 for controlling the plate surface temperature, and thereafter subjected to appropriate processing such as cutting.

  Each of the printing units 3 and 3 constituting the printing unit 2 is formed by arranging a pair of printing mechanisms on the upper and lower sides of the paper 1 as shown in FIG. Each of these printing mechanisms includes a blanket cylinder 6, a plate cylinder 7, an ink supply device 8, and a fountain solution supply device 9. During printing, ink is supplied from the ink supply device 8 to the image line portion of the outer peripheral surface of the plate cylinder 7 (the outer peripheral surface of the printing plate constituting the outer peripheral layer of the plate cylinder 7), The dampening water is supplied from the dampening water supply device 9 to the line portion. Then, the ink supplied to the image line portion is temporarily transferred to the outer peripheral surface of the blanket cylinder 6 (the outer peripheral surface of the blanket constituting the outer peripheral layer of the blanket cylinder 6), and then the surface of the paper 1 or Printing is performed by transferring to the back side. The color of the ink that the printing units 3 and 3 print on the front and back surfaces of the paper 1 is different for each of the printing units 3 and 3.

  The drying unit 4 dries the ink by blowing hot air on the front and back surfaces of the paper 1.

  Further, the cooling unit 5 includes a plurality of cooling cylinders 10 and 10 each having a cooling water circulation path therein, and the outer peripheral surfaces of the cooling cylinders 10 and 10 are on the front and back surfaces of the paper 1. The sheet 1 is cooled by rolling.

  By the way, in the case of the offset printing machine as described above, with use, the outer peripheral surface of each blanket cylinder 6, 6 is stained with excess ink or paper dust that has not been transferred to the paper 1 (hereinafter, Such a stain mainly composed of ink is referred to as “ink stain.” The same applies to claims.) When the accumulation amount of the ink stain increases, the ink stain adheres to the printed matter, and the quality of the printed matter is deteriorated. For this reason, in order to avoid the occurrence of such a problem, it is necessary to periodically clean the outer peripheral surface of each of the blanket cylinders 6 and 6. The outer peripheral surfaces of the blanket cylinders 6 and 6 need to be cleaned when the printing plate constituting the outer peripheral layer of the plate cylinders 7 and 7 is replaced with another printing plate. In any case, as a method for cleaning the outer peripheral surfaces of the blanket cylinders 6 and 6, a method of wiping ink stains with a cleaning cloth such as a nonwoven fabric impregnated with a cleaning liquid is conventionally known. Describes an apparatus for automating this cleaning method.

  In the case of the offset printing machine as described above, undried ink may remain on the front and back surfaces of the paper 1 sent to the cooling unit 5. It may adhere to the outer peripheral surfaces of the cylinders 10 and 10. If such ink stains are left unattended, the ink stains adhere to the paper 1 that is sent later, and the quality of the printed matter is lowered. For this reason, in order to avoid the occurrence of such problems, a wiping roller (not shown) with a non-illustrated non-woven fabric impregnated with a cleaning liquid is always provided on a circumferential portion of the outer peripheral surface of each of the cooling cylinders 10 and 10 during printing. By making the outer peripheral surface of the roller) slidably contact with each other, the ink stain can be wiped off immediately (from the time when the ink stain is adhered until the cooling cylinders 10 and 10 rotate once). ing.

  However, when the printing company or the like cleans the outer peripheral surfaces of the blanket cylinders 6 and 6 and the cooling cylinders 10 and 10 by the method described above, the following problems to be improved arise.

  First of all, the printing company, etc. purchases cleaning liquid, at least the purchase cost of cleaning cloth such as non-woven fabric, and the cost of processing the used cleaning cloth (with ink stains) as industrial waste. And the running cost required for cleaning increases.

  In addition, since cleaning cloths after use are impregnated with cleaning liquid used for cleaning in addition to ink stains, treating all of these as industrial waste leads to a large environmental load. .

Japanese Utility Model Publication No. 5-28636

  In view of the circumstances as described above, the present invention realizes a cleaning device capable of suppressing the running cost required for cleaning the outer peripheral surface of a roller for a printing press, and a method capable of processing waste liquid generated by this cleaning with a low environmental load. Invented accordingly.

<On the circulation supply method of cleaning liquid for printing roller>
The method for circulating and supplying the cleaning liquid for the printing press roller according to the first aspect of the present invention includes a recovery step, a regeneration step, and a supply step.
Of these, the recovery process adheres to the outer peripheral surface by spraying a cleaning liquid onto the outer peripheral surface of a printing press roller (a blanket cylinder, a cooling cylinder, an impression cylinder, an ink kneading roller, etc.) constituting the printing press. While washing away dirt (ink stains and paper dust), the cleaning liquid containing the dirt is collected, and the collected cleaning liquid is filtered by a filter to remove the dirt, and then sprayed onto the outer peripheral surface again. The cleaning device configured so that it can be used for cleaning the outer peripheral surface by a printing station (including all business entities and places that perform printing using a printing device such as a printing company, a printing factory, etc.) Is a step of recovering from the printing shop the waste liquid, which is a cleaning liquid having a stain concentration that is so high that it cannot be completely removed by the filter.
The regeneration step is a step of obtaining a regenerated liquid of the cleaning liquid by subjecting the waste liquid recovered in the recovery process to a regeneration process to separate and remove dirt from the waste liquid.
The supplying step is a step of supplying the regenerating liquid obtained in the regenerating process to a printing place (the printing place or another printing place) where the cleaning device is to be used by using the regenerating liquid.

  When carrying out such a circulating supply method of cleaning liquid for a roller for a printing press according to the present invention, preferably, in addition to recovering waste liquid from a printing shop in the recovery step as in the invention described in claim 2. Then, the filter constituting the filter is recovered from this printing station. In addition to acquiring the regenerated liquid in the regeneration step, the filter recovered in the recovery step is washed to remove dirt from the filter, thereby acquiring the regeneration filter. Further, in the supplying step, in addition to supplying the regenerating liquid to the printing shop, a regenerating filter is supplied to the printing house.

  In addition, when the waste liquid contains ink stains, and this ink is flammable, more preferably, as in the invention described in claim 3, the waste ink generated in the regeneration step (in the recovery step). A fuel resource utilization process is provided in which the recovered cleaning liquid and ink stains separated and removed from the filter are used as fuel resources.

<About cleaning equipment>
A cleaning device (described in claim 4) of the present invention is a cleaning device that can be used when the above-described method for circulating and supplying cleaning fluid for a roller for a printing press according to the present invention described above. A tank, a filter capable of removing dirt mixed in the cleaning liquid, a suction nozzle for sucking an object to be sucked, and an injection provided in the suction nozzle for injecting the cleaning liquid toward the opening end of the suction nozzle A nozzle. Then, the printing press roller is rotated with respect to the suction nozzle while the opening end of the suction nozzle is brought close to or in contact with the outer peripheral surface of the printing press roller constituting the printing press. The outer peripheral surface of the roller for cleaning is cleaned from the cleaning liquid supplied from the cleaning liquid storage tank and filtered by the filter, and the outer peripheral surface is washed away from the outer peripheral surface by spraying from the spray nozzle. By collecting the cleaning liquid sprayed onto the cleaning liquid storage tank together with the dirt, the outer peripheral surface can be cleaned while circulating the cleaning liquid.

  When carrying out such a cleaning apparatus of the present invention, preferably, the configuration of the invention described in claim 5, that is, a plurality of suction nozzles provided with injection nozzles inside is provided, and the opening ends of these suction nozzles are provided. Staggered arrangement in a plurality of linear rows parallel to the axial direction of the printing press roller, and an opening end of at least one suction nozzle in each part of the axial cleaning range of the outer peripheral surface of the printing press roller A configuration is adopted in which the outer peripheral surface can be cleaned in the proximity or contact state.

<On the circulation supply method of cleaning liquid for printing roller>
According to the above-described method of circulating and supplying the cleaning liquid for the roller for the printing press according to the present invention, it is necessary for the printing shop to purchase the cleaning cloth such as the nonwoven fabric in order to clean the outer peripheral surface of the roller for the printing press. Absent. Further, in many cases, the cleaning liquid purchased for performing this cleaning may be a regenerated liquid that is less expensive than a new cleaning liquid. The purchased cleaning liquid is economical because it can be circulated and reused (until it becomes waste liquid) by a cleaning device. Further, the waste liquid does not need to be processed as industrial waste, and can be collected by a supplier who circulates and supplies the cleaning liquid, for example, in a mode of paying a relatively low recovery cost or a mode of purchase. Therefore, the running cost required for the cleaning can be suppressed.
In addition, the waste liquid is recovered from the printing shop in the recovery process, becomes a recycled liquid in the regeneration process, and is then supplied again to the printing shop in the supply process. For this reason, the portion of the waste liquid that is finally discarded is only dirt (waste ink and paper powder) generated in the regeneration process. Therefore, the waste liquid can be processed with a low environmental load.

Further, in order to clean the outer peripheral surface of the roller for the printing press, it is necessary for the printing shop to purchase a filter constituting the filter. However, if the configuration of the invention described in claim 2 is adopted, In many cases, the filter to be purchased is a low-cost regeneration filter compared to a new filter. Further, the used filter does not need to be treated as industrial waste, and is collected by a supplier who circulates and supplies the filter and the cleaning liquid, for example, in a mode of paying a relatively low recovery cost or a mode of purchase. You can get it. For this reason, the running cost required for the cleaning can be kept low.
Further, the used filter is collected from the printing shop in the collecting process, then becomes a reproducing filter in the reproducing process, and then supplied again to the printing shop in the supplying process. For this reason, the part finally discarded among the filters after use is only dirt (waste ink and paper dust) generated in the regeneration process. Therefore, the used filter can be processed with a low environmental load.

  If the configuration of the invention described in claim 3 is adopted, waste ink can be processed as fuel resources in the fuel resource utilization step. For this reason, the environmental load can be further reduced and resources can be effectively used.

<About cleaning equipment>
According to the cleaning apparatus of the present invention configured as described above, cleaning of the outer peripheral surface of the roller for a printing press can be performed while using the cleaning liquid in a circulating manner without using cleaning cloths such as nonwoven fabric. For this reason, the running cost required for this cleaning can be kept low.

  Further, if the configuration of the invention described in claim 5 is adopted, the outer peripheral surface of the printing press roller can be cleaned by using a plurality of suction nozzles provided with injection nozzles on the inner side. The area of the tip opening can be reduced (compared to the case where cleaning is performed using only one suction nozzle provided with an injection nozzle inside). Accordingly, the suction force inside these suction nozzles can be made closer to that amount, and the suction efficiency of the cleaning liquid can be increased.

The block diagram of the washing | cleaning apparatus which shows one example of embodiment of this invention. Sectional drawing of the peripheral part of a washing | cleaning liquid storage tank. The figure which looked at the washing nozzle unit from the tip side. AA sectional drawing of FIG. The flowchart for demonstrating the circulation supply method of a washing | cleaning liquid. Schematic which shows an example of the offset printing machine conventionally known. Schematic of the printing unit which comprises this offset printing machine.

  An example of an embodiment of the present invention will be described with reference to FIGS.

<Description of cleaning device>
1-4 has shown the washing | cleaning apparatus of this example.
As shown in the block diagram of FIG. 1, the cleaning apparatus of this example includes a cleaning liquid storage tank 11, a filter 12, a supply tube 13, a supply pump 14, a cleaning nozzle unit 15, and a suction hose. 16 and a suction fan motor 17.

  Of these, the cleaning liquid storage tank 11 can store the cleaning liquid (organic solvent) 18 therein, as shown in detail in FIG. The cleaning liquid storage tank 11 includes an L-shaped delivery pipe 19 and a “<” shaped delivery pipe 20. Of these, the delivery pipe 19 is for delivering the cleaning liquid 18 from the inside of the cleaning liquid storage tank 11 to the outside, and projects the upper end of the cleaning liquid from the upper end surface of the cleaning liquid storage tank 11 and the lower end of the upper end. The cleaning liquid is stored in the cleaning liquid 18 stored in the cleaning liquid storage tank 11. On the other hand, the feed pipe 20 is for feeding the cleaning liquid 18 from the outside to the inside of the cleaning liquid storage tank 11, and its upper end protrudes to the outside from the upper end surface of the cleaning liquid storage tank 11, and its lower end. Is disposed above the surface of the cleaning liquid 18 stored in the cleaning liquid storage tank 11.

  The filter 12 is installed in the cleaning liquid storage tank 11. As shown in detail in FIG. 2, the filter 12 includes two front-stage filters 21 a and 21 b and one rear-stage filter 22. Of these, the two front-stage filters 21 a and 21 b are arranged at intervals in the vertical direction between the liquid level of the cleaning liquid 18 stored in the cleaning liquid storage tank 11 and the feed pipe 20. Yes. The post-stage filter 22 is disposed in the cleaning liquid 18 stored in the cleaning liquid storage tank 11 while being connected to the lower end of the delivery pipe 20. The fineness of each of the filters 21a, 21b, and 22 is determined in the order in which the cleaning liquid 18 is filtered (removal of ink stains contained in the cleaning liquid 18) during the cleaning operation described later, that is, the pre-stage filter 21a → the pre-stage filter. It is made finer step by step in the order of 21b → the latter filter 22. By adopting such a configuration, the filtration performance of the filter 12 is sufficiently secured, and the filtration speed of the filter 12 is sufficiently secured, so that the washing liquid storage tank 11 can be used at the time of a washing operation described later. It is made possible to avoid the occurrence of a situation where the cleaning liquid 18 sent out from the inside to the outside is insufficient. When the present invention is implemented, the number of filters constituting the filter 12 may be different from that in the present example (for example, the number of pre-filters may be three or more).

  Further, the base end portion (lower end portion in FIG. 1) of the supply tube 13 is connected to the upper end portion of the delivery pipe 19 (FIG. 2) via the supply pump 14. On the other hand, the tip of the supply tube 13 (the left end at the top in FIG. 1) is connected to the cleaning nozzle unit 15. The supply pump 14 is for supplying the filtered cleaning liquid 18 stored in the cleaning liquid storage tank 11 to the cleaning nozzle unit 15 through the delivery pipe 19 and the supply tube 13.

  The cleaning nozzle unit 15 includes seven cleaning nozzles 23 and 23 held by a substantially rectangular parallelepiped cleaning head 24, as shown in detail in FIGS. Of these, the seven cleaning nozzles 23 and 23 are each composed of a suction nozzle 25 and an injection nozzle 26 provided in the suction nozzle 25. Of these, the base end portion of the suction nozzle 25 {the right end portion in FIG. 4 (not shown in the figure)} is connected to the distal end portion (the left end portion in the upper portion of FIG. 1) of the suction hose 16. On the other hand, the front end portion (left end portion in FIG. 4) of the suction nozzle 25 is opened to the front end surface (surface shown in FIG. 3, left end surface in FIG. 4) of the cleaning head 24. Further, the base end portion {the right end portion in FIG. 4 (not shown in the figure)} of the injection nozzle 26 is connected to the distal end portion (the left end portion in the upper portion in FIG. 1) of the supply tube 13. On the other hand, the tip end portion (left end portion in FIG. 4) of the injection nozzle 26 faces the tip opening of the suction nozzle 25. As a result, the cleaning liquid 18 can be jetted from the tip of the jet nozzle 26 toward the tip opening of the suction nozzle 25.

The shape of the opening of the tip of the suction nozzles 25, 25 constituting the seven washing nozzles 23, 23 is a long rectangle as shown in FIG. In the case of this example, as shown in the figure, the tip openings of the suction nozzles 25, 25 are arranged in a staggered manner on the tip surface of the cleaning head 24 {the length direction of the tip surface (the horizontal direction in FIG. 3). ) In a staggered arrangement in two straight lines parallel to each other. Further, in such a staggered arrangement, both end portions in the length direction of each tip opening existing in one (upper side in FIG. 3) (each tip opening existing in both length direction ends of the cleaning head 24). The other end (excluding the ends opposite to each other) and the lengthwise ends of each tip opening existing in the other (lower side in FIG. 3) are separated from each other in the direction of the distance between the two straight rows (up and down direction in FIG. 3). Are superimposed on each other. The width W _A of the arrangement region of the front end opening of each of the suction nozzles 25 and 25 with respect to the length direction of the front end surface of the cleaning head 24 is the axial direction of the cleaning range of the outer peripheral surface of the printing roller 29 described later. It is larger than the width.

  The front end portion (left end portion in FIG. 4) of the cleaning head 24 is constituted by a surface layer body 27. The surface layer 27 is made of a material having a low friction coefficient (preferably a soft material) such as fluoro rubber, PTFE resin, PA resin or the like. Further, the front end surface of the surface layer body 27 (the front end surface of the cleaning head 24) has a length direction of the cleaning head 24 and an axial direction of the printing press roller 29 as shown in FIG. In this state, it is a partially cylindrical concave surface that matches or substantially matches the outer peripheral surface of this printing press roller 29. In addition, a large number of small hemispherical protrusions are integrally formed on the front end surface of such a surface layer body 27 so as to be spread over the entire front end surface.

  Further, the base end portion (lower end portion in FIG. 1) of the suction hose 16 is connected to the upper end portion of the feed pipe 20 (FIG. 2).

  The suction fan motor 17 is installed at the upper end of the cleaning liquid reservoir 11 as shown in detail in FIG. The suction fan motor 17 forcibly discharges the air in the cleaning liquid storage tank 11 to the outside, and the cleaning liquid 18 used for cleaning in the cleaning nozzle unit 15 portion together with the outside air. This is for suctioning into the cleaning liquid reservoir 11 through the suction hose 16 and the feed pipe 20. An air cleaning filter 28 is provided at the upstream end of the suction fan motor 17 (the upper end inside the cleaning liquid storage tank 11).

  When the outer peripheral surface of the printing press roller 29 is cleaned using the cleaning device of this example configured as described above, while rotating the printing press roller 29 as shown in FIG. The front end surface of the cleaning head 24 constituting the cleaning nozzle unit 15 is brought into contact (sliding contact) with a part of the outer peripheral surface of the roller 29 for the printing press. In this state, the cleaning liquid 18 stored in the cleaning liquid storage tank 11 is supplied to the spray nozzles 26 and 26 through the delivery pipe 19 and the supply tube 13. The cleaning liquid 18 supplied in this way is ejected from the tip of each of the ejection nozzles 26, 26 toward the outer peripheral surface of the printing press roller 29, thereby causing ink stains adhering to the outer peripheral surface. Wash off. Further, while washing away the ink stains adhering to the outer peripheral surface, the cleaning liquid 18 containing the ink stains is sucked together with the outside air by the suction nozzles 25 and 25. Then, the cleaning liquid 18 and the outside air sucked in this way are sent into the cleaning liquid storage tank 11 through the suction hose 16 and the feeding pipe 20. Then, the cleaning liquid 18 is filtered by the filter 12 (passed in the order of the front-stage filter 21a → the front-stage filter 21b → the rear-stage filter 22), thereby removing ink stains contained in the cleaning liquid 18. Then, the cleaning liquid 18 from which the ink stain has been removed is supplied again to each of the ejection nozzles 26 and 26 through the delivery pipe 19 and the supply tube 13, and used for cleaning the outer peripheral surface of the printing press roller 29. That is, the outer peripheral surface of the printing roller 29 is cleaned while circulating the cleaning liquid 18 in the cleaning apparatus.

  When the outer peripheral surface of the printing press roller 29 is cleaned as described above, the outside air sucked by the suction nozzles 25 and 25 is separated from the outer peripheral surface of the printing press roller 29 and the cleaning head. 14 is sucked into the suction nozzles 25 and 25 through gaps existing between the tip surfaces (the surfaces of a number of hemispherical protrusions provided on the tip surface of the surface layer 27). For this reason, an airflow in a direction from the outside to the inside of each of the suction nozzles 25, 25 is generated in the gap. In the case of this example, the strength of the airflow is sufficiently increased (for this purpose, the width of the gap and the performance of the suction fan motor 17 are adjusted), and the inside of each of the suction nozzles 25, 25 is adjusted. The cleaning liquid 18 used for cleaning is prevented from leaking outside through the gap.

  In the case where the outer peripheral surface of the printing press roller 29 is cleaned as described above and the printing press roller 29 is the blanket cylinder 6 (see FIGS. 6 and 7), this blanket cylinder is used. 6 is performed while the printing operation by the offset printing machine is stopped. Therefore, when the cleaning device of this example is used for cleaning the outer peripheral surface of the blanket cylinder 6, the front end surface of the cleaning nozzle unit 15 is only cleaned relative to the outer peripheral surface of the blanket cylinder 6. A mechanism that abuts and retracts during non-cleaning is provided. On the other hand, when the printing press roller 29 is the cooling cylinder 10 (see FIG. 6), the cooling cylinder 10 can be washed during the printing operation by the offset printing machine. Therefore, when the cleaning apparatus of this example is used for cleaning the outer peripheral surface of the cooling cylinder 10, the front end surface of the cleaning nozzle unit 15 (the front end surface of the cleaning head 24) is connected to the cooling cylinder 10. You may always contact | abut with respect to an outer peripheral surface.

  In any case, when the outer peripheral surface of the printing press roller 29 is cleaned using the cleaning device of this example, the front end surface of the cleaning nozzle unit 15 is in contact with the outer peripheral surface of the printing press roller 29. By adopting a configuration in which the cleaning liquid 18 can be sprayed from the spray nozzles 26 and 26 only when the suction nozzles 25 and 25 are in contact with each other and sucking outside air, It is preferable to prevent the cleaning liquid 18 from leaking to the outside of 25.

  According to the cleaning apparatus of the present example configured and used as described above, the cleaning liquid 18 is circulated and used for cleaning the outer peripheral surface of the printing press roller 29 without using cleaning cloths such as nonwoven fabric. You can do it. For this reason, the running cost required for this cleaning can be suppressed.

  Further, in the case of the cleaning device of this example, the outer peripheral surface of the printing press roller 29 is cleaned using a plurality of (seven in this example) cleaning nozzles 23, 23. The area of the opening of the suction nozzles 25, 25 constituting each of the cleaning nozzles 23, 23 can be reduced (compared to the case where cleaning is performed using only one cleaning nozzle 23). Accordingly, the suction force inside the suction nozzles 25, 25 can be made closer to that amount, and the suction efficiency of the cleaning liquid 18 can be increased. Further, in the case of the cleaning apparatus of this example, the suction nozzles 25, 25 are arranged in a staggered manner as shown in FIG. 3, so that the axis of the cleaning range of the outer peripheral surface of the roller 29 for the printing press is arranged. There is no portion that is not cleaned in the middle part of the direction.

  In the case of the cleaning apparatus of this example, the surface layer portion of the front end surface of the cleaning head 24 is constituted by a surface layer body 27 made of a soft material having a small friction coefficient, such as fluorine rubber. Therefore, the frictional force acting between the front end surface of the cleaning head 24 and the outer peripheral surface of the printing press roller 29 hardly inhibits the rotation of the printing press roller 29, and the cleaning head The outer peripheral surface of this printing press roller 29 is not damaged by the front end surface of 24.

In the above-described cleaning device of this example, when the outer peripheral surface of the printing press roller 29 is cleaned, a configuration is adopted in which the front end surface of the cleaning head 24 comes into contact (sliding contact) with the outer peripheral surface. However, when the cleaning apparatus of the present invention is implemented, the front end surface of the cleaning head is a smooth partial cylindrical concave surface, and the front end surface of the cleaning head is in close proximity to the outer peripheral surface of the roller for a printing press. Therefore, it is possible to employ a configuration for cleaning the outer peripheral surface. However, in this case, in order to prevent the cleaning liquid existing inside each suction nozzle from leaking outside through the gap existing between the tip surface and the outer peripheral surface, the thickness dimension of the gap ( = Proximity facing distance between the tip surface and the outer peripheral surface. This distance can be confirmed by, for example, a position sensor provided on the cleaning head side.) It is necessary to increase the flow of the outside air flowing in toward it. In this regard, the present inventor conducted an experiment. As a result of the adjustment as described above, when the shortest width W _B (see FIG. 3) of the gap is 2 mm, the thickness dimension of the gap is set to 1 It was confirmed that the cleaning liquid could be prevented from leaking out even when expanded to about 5 mm. When the outer peripheral surface of the printing press roller is cleaned using the cleaning device of the present invention, the portion of the outer peripheral surface of the printing press roller is the portion of the portion where the tip opening of the suction nozzle is opposed. If the cleaning liquid is sprayed toward the end portion on the counter-rotating side of the outer peripheral surface (the upper end portion in the example shown in FIG. 4), the above-described leakage of the cleaning liquid can be more easily prevented.

  Further, when the present invention is implemented, if a plurality of cleaning nozzle units are provided in one cleaning device, it is possible to clean a plurality of printing press rollers with this one cleaning device. For example, two blanket cylinders 6 and 6 constituting one printing unit 3 shown in FIGS. 6 to 7, all blanket cylinders 6 and 6 constituting one printing unit 2, and a cooling unit 5 are included. It is possible to clean all the cooling cylinders 10 and 10 that are configured with a single cleaning device.

<Description of circulating supply method of cleaning liquid for roller for printing press>
Next, with reference to FIG. 4, the method for circulating and supplying the cleaning liquid for the roller for the printing press according to this embodiment will be described. In this example, for one or a plurality of printing companies that use the cleaning device of the present invention as described above to clean the outer peripheral surface of the cleaning machine roller constituting the offset printing machine. The following description will be given on the assumption that the cleaning liquid manufacturer implements the cleaning liquid circulating supply method for the printing press roller of the present invention.

  The method for circulating and supplying the cleaning liquid for the roller for the printing press in this example is performed by sequentially repeating the recovery process, the regeneration process, and the supply process.

  Of these, in the collecting step, the waste liquid generated by using the cleaning device by the one or more printing companies {the concentration of ink stains was so high that it could not be removed by the filter 12 (FIG. 1). The cleaning liquid manufacturer and the used filter constituting the filter 12 are collected by the cleaning liquid manufacturer from the one or more printing companies (step 1). Specifically, the one or more printing companies receive and collect a collection cost that is lower than the cost for disposal as industrial waste, or collect it free of charge, or the one or more printing companies Buy and collect at a price lower than the price the company purchased.

  Next, in the regeneration step, the cleaning liquid manufacturer separates and removes ink stains from the waste liquid by carrying out distillation regeneration processing of the waste liquid collected in the recovery process at its own factory, and the regeneration liquid of the cleaning liquid is removed. get. At the same time, the used filter collected in the collecting step is washed to remove ink stains from the filter, thereby obtaining a reproduction filter (step 2). In addition, waste ink (ink stains separated and removed from the waste liquid and used filter) generated in this regeneration process is sludge treated in the company's own factory.

  Next, in the supply process, the cleaning liquid manufacturer directly supplies the regenerated liquid and the regenerated filter acquired in the regenerating process to the one or more printing companies (sold at a lower price than new products) (step 3). Or indirectly through a printer manufacturer or sales agent (sold at a lower price than a new product) (step 4). The one or more printing companies use these regenerating liquids and regenerating filters to clean the outer peripheral surface of the printing press roller 29 constituting the offset printing machine by the cleaning device.

  According to the method for circulating supply of cleaning liquid for the printing press roller of the present example configured as described above, one or a plurality of printing companies can use the cleaning of the present invention described above as a cleaning device for the outer peripheral surface of the printing press roller 29. Since the apparatus is used, it is not necessary to purchase cleaning cloths such as nonwoven fabric in order to clean the outer peripheral surface of the roller 29 for the printing press. Although it is necessary to purchase the cleaning liquid and the filter of the filter 12, the cleaning liquid and filter purchased at this time are a regenerating liquid and a regenerating filter that are less expensive than new cleaning liquids and filters. In addition, the purchased cleaning liquid (recycled liquid) is economical because it can be circulated and reused (until it becomes a waste liquid) by a cleaning device. In addition, the waste liquid and used filters do not need to be treated as industrial waste, but can be collected at a lower recovery cost than that required for disposal as industrial waste or collected free of charge. You can get it or collect it in the form of a purchase. For this reason, the running cost required for the cleaning can be suppressed. Further, the waste liquid and the used filter are recovered in the recovery process, then become the regenerated liquid and the regeneration filter in the regeneration process, and then supplied again to one or more printing companies in the supply process. For this reason, the portion of the waste liquid and the used filter that is finally discarded is at most only the waste ink generated in the regeneration process. Therefore, the waste liquid and the used filter can be processed with a low environmental load.

  In addition, when the cleaning liquid supply method for a roller for a printing press according to the present invention is implemented, the waste ink generated in the regeneration process is used as a fuel resource (for example, fuel for a heater for distillation regeneration regeneration of the cleaning liquid). In addition, the environmental load when processing the waste ink and the used filter can be further reduced, and the resources can be effectively used.

  The method for supplying the cleaning liquid for the roller for the printing press according to the present invention is not limited to the cleaning apparatus shown in FIGS. 1 to 4 described above, and uses a cleaning apparatus having a configuration in which the cleaning liquid is circulated while being filtered. This can be implemented for one or more printing stations.

  As in the present invention, the cleaning liquid circulation supply method for regenerating and supplying the cleaning liquid to the printing station is ink stains on portions other than the printing press rollers constituting the printing press (for example, a doctor blade used in intaglio printing). It can also be applied to the recycling of cleaning liquid for cleaning.

DESCRIPTION OF SYMBOLS 1 Paper 2 Printing part 3 Printing unit 4 Drying part 5 Cooling part 6 Blanket cylinder 7 Plate cylinder 8 Ink supply apparatus 9 Dampening water supply apparatus 10 Cooling cylinder 11 Washing liquid storage tank 12 Filter 13 Supply tube 14 Supply pump 15 Cleaning nozzle Unit 16 Suction hose 17 Suction fan motor 18 Cleaning liquid 19 Delivery pipe 20 Delivery pipe 21a, 20b Pre-stage filter 22 Post-stage filter 23 Cleaning nozzle 24 Cleaning head 25 Suction nozzle 26 Injection nozzle 27 Surface layer body 28 Air cleaning filter 29 Roller for printing machine

Claims (5)

  By spraying the cleaning liquid onto the outer peripheral surface of the printing press roller constituting the printing press, the cleaning liquid containing the dirt is recovered while washing off the dirt adhering to the outer peripheral surface, and the recovered cleaning liquid is After removing dirt by filtering with a filter, it was generated by using a printing apparatus that was configured to be used for cleaning the outer peripheral surface by spraying the outer peripheral surface again, The waste liquid, which is a cleaning liquid whose concentration of stains is so high that it cannot be completely removed by the filter, is recovered from the waste liquid by performing a recovery process for recovering from the printing station and regenerating the waste liquid recovered in the recovery process. By separating and removing the dirt, the regeneration process for obtaining the regenerated liquid of the cleaning liquid and the regenerated liquid obtained in this regenerating process are supplied to the printing shop where the cleaning device is to be used with this regenerated liquid. Supplying step and a circulating supply method of the cleaning liquid for a printing press roller to. In addition to collecting the waste liquid from the printing shop in the collecting process, the filter constituting the filter is collected from this printing shop,
In addition to obtaining the regenerated liquid in the regeneration process, by washing the filter collected in the recovery process, removing the dirt from this filter, the regenerated filter is obtained,
In the supply process, in addition to supplying the regenerating liquid to the printing shop, supplying the regenerating filter to the printing shop,
A method for circulating and supplying cleaning liquid for a roller for a printing press according to claim 1.   The roller for a printing press according to any one of claims 1 to 2, further comprising a fuel resource utilization step in which the waste liquid contains ink stains and uses the waste ink generated in the regeneration step as a fuel resource. Supply method of cleaning liquid.   A cleaning device that can be used when the cleaning liquid circulating supply method for a printing press roller according to any one of claims 1 to 3 is implemented, and a cleaning liquid storage tank that stores the cleaning liquid, and the cleaning liquid A filter capable of removing contaminants mixed in, a suction nozzle for sucking an object to be sucked, and an injection nozzle provided in the suction nozzle for injecting a cleaning liquid toward the opening end of the suction nozzle, This printing press roller while rotating the printing press roller with respect to the suction nozzle in a state where the opening end of the suction nozzle is brought close to or in contact with the outer peripheral surface of the printing press roller constituting the printing press The outer peripheral surface of the outer peripheral surface of the outer peripheral surface of the outer peripheral surface is washed away by removing the cleaning liquid supplied from the cleaning liquid storage tank and filtered by the filter from the injection nozzle, thereby washing off the outer periphery. The injected washing solution to the, by recovering the washing liquid reservoir with the dirt, constructed cleaning device as perform the cleaning of the outer peripheral surface while recycling the washing liquid.   A plurality of suction nozzles provided with injection nozzles on the inside are provided, and the open ends of each suction nozzle are staggered in a plurality of straight lines parallel to the axial direction of the printing press roller, and the outer peripheral surface of the printing press roller The cleaning apparatus according to claim 4, wherein the outer peripheral surface can be cleaned in a state where the open end of at least one suction nozzle is brought close to or in contact with each part of the cleaning range in the axial direction. .

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