JP2006240077A - Cleaning device of cylinder of printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the efficiency of cleaning of a cylinder, while preventing a cleaning fluid from being splashed. <P>SOLUTION: This cleaning device comprises a first cleaning fluid jetting means 5 which is provided in the vicinity of the outer peripheral surface of the cylinder 73 and jets the cleaning fluid onto the outer peripheral surface of the cylinder 73, a brush roller 7 which is provided downstream of the first cleaning fluid jetting means 5 and can rotate in contact with the outer peripheral surface of the cylinder 73 and a cleaning fluid splash preventing member 8 which has an opening part 8a formed on the side opposed to the outer peripheral surface of the cylinder 73 and prevents the cleaning fluid from being splashed, covering the first cleaning fluid jetting means 5 and the brush roller 7 from outside the periphery of the cylinder 73, with the opening part 8a closed up by the outer peripheral surface of the cylinder 73. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cylinder cleaning device for a printing press, and more particularly to a cylinder cleaning device for a printing press suitable for cleaning a plate cylinder provided in a coating unit and having a varnish plate wound around an outer peripheral surface thereof. is there.

10 and 11 show a conventional single-sided printing type sheet-fed printing press provided with a coating unit, FIG. 10 is a schematic configuration diagram thereof, and FIG. 11 is a side view showing the coating unit.
As shown in FIG. 10, a conventional sheet-fed printing press includes, as main components, a sheet feeding device 51 and a plurality of sets of printing units 52a to 52d (indicated by reference numeral 52 when not individually distinguished). 53, a coating unit 54, a sheet conveying device 55, and a sheet stacking device 56.

The sheet supply device 51 is configured to sequentially supply the sheets 1 to be printed stacked on the paper feed table 51a one by one from the top to the next printing device 53.
Each printing unit 52 of the printing apparatus 53 is a unit that performs predetermined printing on the sheet 1, and the ink supplied to an ink reservoir (not shown) is appropriately kneaded in the process of sequentially transferring a group of ink rollers (not shown). Then, the ink is transferred to the printing plate 61 mounted on the plate cylinder 60 as an ink coating, and further transferred to the downstream blanket cylinder 62 as a pattern. Thereafter, this ink is transferred to the surface of the sheet 1 running between the blanket cylinder 62 and the impression cylinder 63, and after the predetermined printing is completed, the printing unit 52 or coating of the next process is performed via the intermediate cylinder 64. Passed to unit 54. Since only one color can be printed in one set of printing units 52, a plurality of sets of printing units 52a to 52d having different ink colors are arranged in parallel in the sheet 1 running direction in a sheet-fed printing machine that performs multicolor printing. It is configured as a set of printing apparatuses provided, and the intended multicolor printing is performed by sequentially passing the printing units 52 through the paper.

  The coating unit 54 is generally provided on the downstream side of the printing device 53 and applies a varnish (coating liquid) for applying gloss to the printing surface of the sheet 1. Specifically, as shown in FIG. 11, the coating unit 54 mainly includes a varnish boat 70, a varnish former roller 71, a varnishing roller 72, a plate cylinder (cylinder) 73, and an impression cylinder 74. . The varnish roller 71, the varnish roller 72, the plate cylinder 73, and the impression cylinder 74 rotate in the directions of the arrows shown in FIG. 11 during the printing operation and during the cleaning of the plate cylinder 73, respectively.

Varnish is stored in the varnish boat 70, and the varnish original roller 71 is disposed in a state in which a part of the outer peripheral surface is immersed in the varnish stored in the varnish boat 70. The varnishing roller 72 contacts the varnish roller 71 and the plate cylinder 73, and transfers the varnish adhering to the outer peripheral surface of the varnish roller 71 to the plate cylinder 73.
A varnish plate (letter plate) 75 having an uneven surface shape is wound around the outer peripheral surface of the plate cylinder 73. A belt-shaped gap (concave portion) 73a is formed on the outer peripheral surface of the plate cylinder 73 in the machine width direction. In the gap 73a, the end portion (one end portion) of the varnish plate 75 and the grip portion are provided. A plate clamping device (not shown) for locking the butt side end (the other end) and clamping the varnish plate 75 to the outer peripheral surface of the plate cylinder 73 is provided. The varnish adhering to the outer peripheral surface of the varnishing roller 72 is transferred to the surface of the varnish plate 75 and then transferred to the printing surface of the sheet 1 supported and conveyed by the outer peripheral surface of the impression cylinder 74. It is like that.

The varnish plate 75 is formed such that a region where the varnish is transferred to the printing surface of the sheet 1 (for example, a predetermined region such as a pattern portion of the printing surface or the entire printing surface) has a convex shape. Only the adhering varnish is transferred to the printing surface of the sheet 1.
When the varnish is transferred to the sheet 1, the varnish roller 72 and the plate cylinder 73 are driven so as to be connected between the varnish base roller 71 and the impression cylinder 7 by a driving device (not shown), When stopping the transfer of the varnish, the varnish roller 72 and / or the plate cylinder 73 are driven so as to be detached.

As shown in FIG. 10, the sheet conveying device 55 includes a chain gripper (not shown) provided in an endless chain 57 a driven by a paper discharge shaft 57 for the sheet 1 having a varnish transferred to a predetermined area by the coating unit 54. In this state, the sheet is conveyed to the sheet stacking device 56 in a state of being gripped.
Further, during the conveyance, the varnish adhering to the printing surface of the sheet 1 is dried by the drying device 55a. The drying device 55a is, for example, a hot air delivery device, an IR lamp, or a UV lamp, and is used by being appropriately switched depending on the type of varnish used. For example, when the varnish used is an aqueous varnish or an oil varnish, a hot air delivery device or an IR lamp is used. When the varnish used is a UV varnish (ultraviolet curable varnish), a UV lamp is used. Is used.

The sheet stacking device 56 is configured to sequentially stack the sheets 1 conveyed by the chain gripper of the sheet conveying device 55 onto the discharge table 56a, and the sheet 1 on the discharge table 56a is set. When it reaches the specified amount (predetermined number), it is carried outside.
By the way, when the varnish plate 75 is cleaned in the above-described conventional sheet-fed printing press, the operator moves to the printing press side every time when the operation is stopped and the printing is finished, and the plate cylinder 73 is moved in a restricted or slow motion (about approx. The varnish plate 75 is cleaned using a cloth soaked with a cleaning liquid (for example, water or warm water) while rotating at 4 rpm. However, such a cleaning operation by wiping depends on the operation status of the printing press, but on average is about 50 times a day, which is a heavy burden on the operator. UV varnish does not dry unless UV is irradiated by a UV lamp, but aqueous varnish is quick-drying and will dry in a few minutes. Therefore, especially when aqueous varnish is used, varnish plate 75 is washed immediately. There is a need. Further, since this hand wiping operation is an operation performed by reaching out to the rotating plate cylinder 73, it is necessary to be careful so that hands, cloths, etc. are not caught in the plate cylinder 73 during the operation. .

  Therefore, in recent years, a cleaning apparatus has been developed that can automatically perform such a cleaning operation without the operator's hand-wiping. For example, in Patent Document 1, when coating is stopped, water or warm water is supplied to a cleaning roller whose surface is made of rubber or synthetic resin, and the surface of the varnish plate is wetted by bringing the cleaning roller into contact with the varnish plate. A technique for preventing the varnish from drying and transferring the varnish adhering to the surface of the varnish plate to the cleaning roller side and removing the varnish is disclosed.

Patent Document 2 discloses a cleaning apparatus that can automatically clean a blanket cylinder, although it is not related to cleaning of a varnish plate. As shown in FIG. 12, the cleaning device disclosed in Patent Document 2 supplies cleaning liquid from the cleaning liquid injection nozzle 80 to the surface of the blanket cylinder 62, and presses the brush roll 81 against the surface of the blanket cylinder 62, thereby blanket cylinder 62. The surface of the blanket cylinder 62 is cleaned by rubbing against the surface of the blanket cylinder 62.
JP2004-181899 JP2002-166529

  However, as described above, since the surface of the varnish plate 75 has a concavo-convex shape, the cleaning roller described in Patent Document 1 may not be able to sufficiently clean every corner of the varnish plate 75. On the other hand, if cleaning is performed by bringing the brush roller 81 described in Patent Document 2 into contact with the varnish plate 75, the tip of the brush roller 81 easily enters every corner of the unevenness of the varnish plate 75. It is considered that the cleaning efficiency of the varnish plate 75 can be increased as compared with the roller. However, in the technique of Patent Document 2, as shown in FIG. 12, there is a problem that the cleaning liquid is bounced by the brush roller 81 and scattered in the vicinity when it is cleaned by the brush roller 81 and adheres to nearby apparatus components. .

  The present invention has been made in view of such problems, and an object of the present invention is to provide a cylinder cleaning device for a printing press that can improve cleaning efficiency of the cylinder while preventing scattering of cleaning liquid.

  For this reason, the cylinder cleaning device for a printing press according to the first aspect of the present invention is a cylinder cleaning device for a printing press for cleaning an outer peripheral surface of a cylinder provided in the printing press. A first cleaning liquid spraying means that is provided in the vicinity and sprays cleaning liquid onto the outer peripheral surface of the cylinder; and a brush roller that is provided below the first cleaning liquid spraying means and that can rotate in contact with the outer peripheral surface of the cylinder An opening is formed on the side facing the outer peripheral surface of the cylinder, the first cleaning liquid ejecting means and the brush roller are covered from the outer circumferential direction of the cylinder, and the opening is closed by the outer peripheral surface of the cylinder. And a cleaning liquid scattering preventing member for preventing the scattering of the cleaning liquid.

A cylinder cleaning apparatus for a printing press according to a second aspect of the present invention is characterized in that, in the apparatus according to the first aspect, a flexible member is provided on the entire periphery of the opening of the cleaning liquid scattering prevention member. .
A cylinder cleaning device for a printing press according to a third aspect of the present invention is characterized in that in the device according to the first or second aspect, a cleaning liquid suction means for sucking a cleaning liquid present on the outer peripheral surface of the cylinder is provided. Yes.

A cylinder cleaning device for a printing press according to a fourth aspect of the present invention is the printer according to the third aspect, wherein the cleaning liquid suction means is provided inside the cleaning liquid scattering prevention member and below the brush roller. It is characterized by that.
A cylinder cleaning device for a printing press according to a fifth aspect of the present invention is the printer according to the third or fourth aspect, wherein the cleaning liquid suction means suctions the suction chamber and the suction chamber opened to the outer peripheral surface of the cylinder. It is characterized by comprising a suction pump.

A cylinder cleaning apparatus for a printing press according to a sixth aspect of the present invention is the apparatus according to any one of the first to fifth aspects, wherein the cylinder cleaning apparatus is provided below the brush roller and above the cleaning liquid suction means. The second cleaning liquid spraying means for spraying the cleaning liquid onto the outer peripheral surface of the cylinder is provided.
A cylinder cleaning device for a printing press according to a seventh aspect of the present invention is the printer according to the sixth aspect, wherein at least one of the first cleaning liquid spraying means and the second cleaning liquid spraying means changes a spraying direction of the cleaning liquid. It is configured to be possible.

The cylinder cleaning device for a printing press according to an eighth aspect of the present invention is the device according to any one of the first to seventh aspects, wherein the brush roller rotates in the same direction and in the opposite direction to the rotational direction of the cylinder. It is characterized by being configured.
A cylinder cleaning apparatus for a printing press according to a ninth aspect of the present invention is the apparatus according to any one of the sixth to eighth aspects, wherein at least one of the first cleaning liquid ejecting means and the second cleaning liquid ejecting means. It is characterized in that a cleaning liquid circulating device for recovering and reusing the cleaning liquid sprayed from is provided.

A cylinder cleaning apparatus for a printing press according to a tenth aspect of the present invention is the apparatus according to any one of the fifth to ninth aspects, wherein the cylinder cleaning apparatus is provided immediately above the cleaning liquid suction means and adjacent to the cleaning liquid suction means. The third cleaning liquid spraying means for spraying the cleaning liquid onto the outer peripheral surface of the cylinder is provided.
The cylinder cleaning device for a printing press according to claim 11 is the device according to any one of claims 1 to 10, wherein the cylinder is provided in a coating unit and a varnish is wound around the surface. It is characterized by a plate cylinder.

  According to the cylinder cleaning apparatus for a printing press of the present invention as set forth in claim 1, since the cylinder outer peripheral surface on which the cleaning liquid is sprayed by the cleaning liquid spraying means is rubbed and cleaned with the brush roller, the cleaning efficiency of the cylinder can be improved. In addition, since the cleaning liquid spraying means and the brush roller are covered from the outer circumferential direction of the cylinder by the cleaning liquid scattering preventing member, it is possible to prevent the cleaning liquid from scattering during cleaning.

According to the cylinder cleaning apparatus for a printing press of the present invention as set forth in claim 2, since the flexible member is provided on the entire periphery of the opening of the cleaning liquid scattering preventing member, damage to the outer peripheral surface of the cylinder can be prevented. .
According to the cylinder cleaning apparatus for a printing press of the present invention as set forth in claim 3, since the cleaning liquid present on the outer peripheral surface of the cylinder is sucked by the cleaning liquid suction means, the scattering of the cleaning liquid can be reliably prevented.

According to the cylinder cleaning apparatus for a printing press of the present invention as set forth in claim 4, since the cleaning liquid suction means is provided inside the cleaning liquid scattering prevention member and below the brush roller, it flows below the brush roller. It is possible to reliably suck the cleaning liquid that is scattered or scattered.
According to the cylinder cleaning apparatus for a printing press of the present invention as set forth in claim 5, the cleaning liquid suction means comprises a suction chamber opened to the cylinder outer peripheral surface and a suction pump for sucking the suction chamber. Therefore, the cleaning liquid can be sucked into the suction chamber by sucking the suction chamber with the suction pump.

  According to the cylinder cleaning device for a printing press of the present invention as set forth in claim 6, the second cleaning liquid is provided below the brush roller and above the cleaning liquid suction means, and jets the cleaning liquid onto the outer peripheral surface of the cylinder. Since the injection means is provided, the cylinder outer peripheral surface can be more reliably cleaned by spraying the cleaning liquid further by the second cleaning liquid injection means after rubbing the cylinder outer peripheral surface with the brush roller. Further, the cleaning liquid ejected from the second cleaning liquid ejecting means is reliably sucked by the cleaning liquid suction means.

According to the cylinder cleaning device for a printing press of the present invention as set forth in claim 7, since at least one of the first cleaning liquid ejecting means and the second cleaning liquid ejecting means is configured to be able to change the ejection direction of the cleaning liquid, The brush roller can be cleaned by spraying toward the brush roller.
According to the cylinder cleaning apparatus for a printing press of the present invention described in claim 8, since the brush roller is configured to rotate in the same direction and in the opposite direction with respect to the rotation direction of the cylinder, the outer peripheral surface of the cylinder is uneven. Even if it has, it can wash | clean more reliably to every corner.

According to the cylinder cleaning device for a printing press of the present invention described in claim 9, since the cleaning liquid is collected and reused by the cleaning liquid circulation device, the cost for purchasing and discarding the cleaning liquid can be reduced.
According to the cylinder cleaning apparatus for a printing press of the present invention, the third cleaning liquid ejecting means that is provided immediately above the cleaning liquid suction means and adjacent to the cleaning liquid suction means, and jets the cleaning liquid to the outer peripheral surface of the cylinder. Thus, the cleaning liquid sprayed from the third cleaning liquid spraying means to the cylinder outer peripheral surface can be immediately sucked by the cleaning liquid suction means.

  According to the cylinder cleaning apparatus for a printing press of the present invention as set forth in claim 11, since the cylinder is a plate cylinder provided in the coating unit and having a varnish plate wound around the surface, the plate cylinder while preventing the cleaning liquid from scattering. That is, the cleaning efficiency of the varnish plate can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(A) 1st Embodiment FIGS. 1-7 is a figure for demonstrating the cylinder washing | cleaning apparatus of the printing press as 1st Embodiment of this invention, FIG. 1 is the side view which expands and shows the principal part. , FIGS. 2 (a) is a diagram schematically illustrating the contact area of the brush and the brush roller relative to the plate cylinder when viewed from the a ₁ direction shown in FIG. 3, the a ₂ direction shown in FIG. 2 (b) 3 3 is a side view showing the coating unit, FIG. 4A is a top view of the cleaning liquid injection nozzle, FIG. 4B is a cross-sectional view taken along line BB in FIG. 4A, and FIG. FIGS. 6A and 6C are diagrams for explaining the operation of the cylinder cleaning device, and FIG. 7A is a direction in which the brush roller is in the same direction as the rotation direction of the plate cylinder. FIG. 7B is a schematic diagram showing a state in which the brush roller is rotating in a direction opposite to the rotation direction of the plate cylinder. 1 to 7, the same parts as those in the conventional example described above are denoted by the same reference numerals.

The cylinder cleaning apparatus according to the present embodiment is used to clean the outer peripheral surface of a cylinder provided in a printing unit or a coating unit of a printing machine such as a sheet-fed printing machine or a flexographic printing machine. Below, the case where this cylinder washing | cleaning apparatus is used for washing | cleaning the plate cylinder provided in the coating unit of the sheet-fed printing machine is demonstrated as an example.
The coating unit 54 is provided, for example, on the downstream side of the printing device 53 of the printing press (see FIG. 10 used in the description of the conventional example), and applies a varnish (coating liquid) for glossing the printing surface of the sheet. It has become. Specifically, as shown in FIG. 3, the coating unit 54 mainly includes a varnish boat 70, a varnish former roller 71, a varnishing roller 72, a plate cylinder (cylinder) 73, and an impression cylinder 74. . The varnishing roller 71, the varnishing roller 72, the plate cylinder 73, and the impression cylinder 74 rotate in the directions of the arrows shown in FIG. 3 during the printing operation and during the cleaning of the plate cylinder 73, respectively.

Varnish is stored in the varnish boat 70, and the varnish original roller 71 is disposed in a state in which a part of the outer peripheral surface is immersed in the varnish stored in the varnish boat 70. The varnishing roller 72 contacts the varnish roller 71 and the plate cylinder 73, and transfers the varnish adhering to the outer peripheral surface of the varnish roller 71 to the plate cylinder 73.
A varnish plate (letter plate) 75 having an uneven surface shape is wound around the outer peripheral surface of the plate cylinder 73. A band-shaped gap (concave portion) 73a is formed on the outer peripheral surface of the plate cylinder 73 in the machine width direction. In this gap 73a, the end portion (one end portion) 75a of the varnish plate 75 and the flange A plate clamping device (not shown) is provided for locking the bottom end portion (other end portion) 75b and clamping the varnish plate 75 to the outer peripheral surface of the plate cylinder 73. The varnish adhering to the outer peripheral surface of the varnishing roller 72 is transferred to the surface of the varnish plate 75 and then transferred to the printing surface of the sheet supported and conveyed by the outer peripheral surface of the impression cylinder 74. It has become.

The varnish plate 75 is formed such that a region where the varnish is transferred to the printing surface of the sheet (for example, a predetermined region such as a pattern portion of the printing surface or the entire printing surface) has a convex shape, and is attached to the convex surface. Only the varnish is transferred to the printing surface of the sheet.
When the varnish is transferred to the sheet, the varnish roller 72 and the plate cylinder 73 are driven to be connected between the varnish base roller 71 and the impression cylinder 7 by a driving device (not shown), When the transfer is stopped, the varnish roller 72 and / or the plate cylinder 73 are driven so as to be detached.

The cylinder cleaning apparatus is disposed at a position close to the outer peripheral surface of the plate cylinder 73 of the coating unit 54, and more specifically, a contact portion between the plate cylinder 73 and the varnishing roller 72, and the plate It is arranged in a space near the outer peripheral surface of the plate cylinder 73 between the contact portions of the cylinder 73 and the impression cylinder 74.
Further, the cylinder cleaning apparatus is configured to clean the outer peripheral surface of the plate cylinder 73 (specifically, cleaning the varnish plate 75 wound around the outer peripheral surface of the plate cylinder 73) by a moving mechanism (not shown). 73 is arranged at a position in contact with 73, and is arranged at a position separated from the plate cylinder 73 when cleaning is not performed.

As shown in FIG. 1, the cylinder cleaning apparatus includes a first spray nozzle (first cleaning liquid spraying means) 5, a second spray nozzle (second cleaning liquid spraying means) 6, a brush roller 7, a cleaning liquid recovery pan (cleaning liquid). The anti-scattering member 8 and the cleaning liquid circulating device 9 are mainly provided.
The first injection nozzle 5 is provided in the vicinity of the outer peripheral surface of the plate cylinder 73 and injects the cleaning liquid onto the outer peripheral surface of the plate cylinder 73. Here, as shown in FIG. 4A, the first injection nozzle 5 includes a pipe (first cylindrical member) 11 extending in the machine width direction (axial direction) of the plate cylinder 73, and the pipe. 11 is provided with a plurality of injection holes 11a projecting substantially perpendicular to the peripheral surface. Further, as shown in FIG. 4B, the pipe 11 extends in the machine width direction of the plate cylinder 73 in the same manner as the pipe 11 and has a hole 10a on the peripheral surface (second pipe). The cylindrical member) 10 is provided. Then, by supplying the cleaning liquid into the pipe 10, the cleaning liquid fills the space between the pipe 10 and the pipe 11 from the hole 10 a of the pipe 10 and is injected from the injection hole 11 a of the pipe 11.

Further, the pipe 11 of the first injection nozzle 5 is rotatable in the direction of arrow C shown in FIG. 4B, and the cleaning liquid injected from the first injection nozzle 5 by moving the pipe 11 in the direction of arrow C. The injection direction can be changed.
In addition, the structure of the 1st injection nozzle 5 is not limited to this, For example, without providing the pipe 10, you may supply a washing | cleaning liquid directly to the inside of the pipe 11. FIG. In addition, as long as the cleaning liquid can be sprayed uniformly over the machine width direction of the plate cylinder 73, the number of the injection holes 11a of the pipe 11 may be changed as appropriate. Further, instead of the injection hole 11a, a belt-like slit may be provided over the length direction (machine width direction) of the pipe 11, and the cleaning liquid may be jetted from this slit.

  The second injection nozzle 6 is located in the vicinity of the outer peripheral surface of the plate cylinder 73 and is located below the position where the first injection nozzle 5 is disposed, that is, the position where the first injection nozzle 5 is disposed. 73 is disposed at a downstream position in the rotation direction during printing and cleaning (direction of the arrow shown in the plate cylinder 73 in FIG. 1), and like the first injection nozzle 5, The cleaning liquid is sprayed on the outer peripheral surface. In this way, the outer peripheral surface of the plate cylinder 73 can be more reliably cleaned by spraying the cleaning liquid further by the second injection nozzle 6 after rubbing the outer peripheral surface of the plate cylinder 73 with the brush roller 7. Since the second injection nozzle 6 has the same configuration as the first injection nozzle 5 described above, the description thereof is omitted here.

The brush roller 7 is disposed at a position between the first injection nozzle 5 and the second injection nozzle 6, that is, at a position below the first injection nozzle and above the second injection nozzle. 73 is configured to rotate in contact with the outer peripheral surface of 73.
Further, the brush roller 7 extends in the machine width direction of the plate cylinder 73, and is rotated radially around the rotation roller 7a rotated by a drive motor (not shown) and the outer peripheral surface of the rotation roller 7a. And a provided brush (flexible member, fixed brush) 7b. The brush 7b of the brush roller 7 is made of, for example, nylon, polypropylene (PP), or Teflon (registered trademark, PFA) having high solvent resistance against the cleaning liquid. Here, the brush 7b is provided on the entire outer peripheral surface of the rotating roller 7a. However, the brush 7b is in contact with the outer peripheral surface of the plate cylinder 73 and can be rubbed uniformly in the machine width direction of the plate cylinder 73. For example, you may make it provide the brush 7b partially instead of the whole rotation roller 7a. Further, the drive motor is provided, for example, on one end side in the machine width direction so as not to interfere with the printing operation and the cleaning operation.

  The cleaning liquid recovery pan 8 has an opening 8 a formed on the side (surface) facing the outer peripheral surface of the plate cylinder 73, and the first injection nozzle 5, the second injection nozzle 6, and the brush roller 7 are moved in the outer circumferential direction of the plate cylinder 73. It is arranged to cover from. That is, the first spray nozzle 5, the second spray nozzle 6 and the brush roller 7 are accommodated in the internal space of the cleaning liquid collection pan 8. The opening 8a is closed by the outer peripheral surface of the plate cylinder 73 so that the cleaning liquid recovery pan 8 is substantially sealed to prevent the cleaning liquid from scattering.

  Further, a brush (flexible member) 14 is attached to the entire peripheral edge portion 12 of the opening 8 a of the cleaning liquid collection pan 8 with a bolt 13 or the like. The brush 14 is made of, for example, the same material as the brush 7 b of the brush roller 7 described above, and has a shape along the outer peripheral surface of the plate cylinder 73. Thereby, it is possible to prevent damage to the outer peripheral surface of the plate cylinder 73 when the peripheral edge portion 12 of the cleaning liquid recovery pan 8 contacts the outer peripheral surface of the plate cylinder 73.

FIG. 2A is a diagram schematically showing the contact region R ₁ of the brush 14 with respect to the plate cylinder 73 and the contact region R ₂ of the brush roller 7 when viewed from the A ₁ direction shown in FIG. as it can be seen from 2 (a), by the brush 14, by contacting region R ₂ is surrounded for the plate cylinder 73 of the brush roller 7, scattering of the cleaning liquid outside is prevented. Although FIG. 2 (b) is an arrow view as viewed from the A ₂ direction shown in FIG. 3, as can be seen from this FIG. 2 (b), the outer periphery of the brush 14 is the plate cylinder 73 of the cleaning liquid recovery pan 8 Since it is in contact with the surface without any gap, the cleaning liquid is prevented from leaking outside the cleaning liquid recovery pan 8.

  A cleaning liquid suction chamber (a suction chamber or a first suction chamber) 21 that sucks the cleaning liquid present on the outer peripheral surface of the plate cylinder 73 is positioned below the second spray nozzle 6 in the cleaning liquid recovery pan 8. Is provided. As a result, it is possible to reliably suck the cleaning liquid that flows downward or scatters below the brush roller 7 and the second spray nozzle 6. Specifically, the partition wall 22 projects from the bottom of the cleaning liquid recovery pan 8 (the bottom of the cleaning liquid recovery pan 8 in the machine vertical direction) 8b toward the outer peripheral surface of the plate cylinder 73, so that the cleaning liquid recovery pan 8 The interior is partitioned into the cleaning liquid suction chamber 21 and the other space (that is, the space where the first spray nozzle 5, the second spray nozzle 6 and the brush roller 7 are disposed) 23. The partition wall 22 extends in the machine width direction of the plate cylinder 73 and is set to a length such that the front end does not interfere with the outer peripheral surface of the plate cylinder 73.

  A cleaning liquid discharge port 15 is provided at the bottom of the cleaning liquid suction chamber 21, and a cleaning liquid discharge port 16 is also provided at the bottom of the space 23. Then, as will be described later, the cleaning liquid suction chamber 21 opened to the outer peripheral surface of the plate cylinder 73 is sucked by the pump (suction pump) 17, so that it is on the outer peripheral surface of the plate cylinder 73 and in the gap of the plate cylinder 73. It can be recovered without leaving the existing cleaning solution. In addition, since the cleaning liquid existing in the gap of the plate cylinder 73 can be sucked and recovered in this way, it is possible to prevent the plate clamping device provided in the gap from being rusted. The cleaning liquid suction means according to the present invention includes the cleaning liquid suction chamber 21 and the pump 17 described above.

  As shown in FIG. 1, the cleaning liquid circulation device 9 sucks the storage tank 20 that stores the recovered cleaning liquid and the cleaning liquid suction chamber 21 of the cleaning liquid recovery pan 8 and returns the cleaning liquid in the cleaning liquid suction chamber 21 to the storage tank 20. The pump 17, the pump (suction pump) 18 that sucks the space 23 of the cleaning liquid recovery pan 8 and returns the cleaning liquid in the space 23 to the storage tank 20, and the cleaning liquid stored in the storage tank 20 A pump (supply pump) 19 that supplies the second injection nozzle 6 is mainly provided. The cleaning liquid recovered from the cleaning liquid recovery pan 8 also includes deposits such as varnish adhering to the outer peripheral surface of the plate cylinder 73. Therefore, the cleaning liquid circulation device 9 uses a filtration device such as a filter (not shown). The cleaning liquid that has been purified is reused. The suction timing by the pumps 17 and 18 and the supply timing by the pump 19 are appropriately controlled by a control device (not shown). In addition, the control device can also control a drive motor that drives the brush roller 7 here.

  Further, in the present embodiment, the cleaning liquid suction chamber 21 of the cleaning liquid recovery pan 8 is sucked stronger than the space 23, and the cleaning liquid present on the outer peripheral surface of the plate cylinder 73 is reliably recovered. The storage tank 20 may be installed below the cleaning liquid recovery pan 8 so that the cleaning liquid stored in the space 23 of the cleaning liquid recovery pan 8 is returned to the storage tank 20 by natural fall without using the pump 18. .

  Since the cylinder cleaning device for a printing press according to the first embodiment of the present invention is configured as described above, the first injection nozzle 5, the second injection nozzle 6, the brush roller 7, and the cleaning liquid recovery pan 8 are configured to perform printing operation. Sometimes, the machine waits at a position separated from the outer peripheral surface of the plate cylinder 73, and approaches the outer peripheral surface of the plate cylinder 73 when the plate cylinder 73 is cleaned after the operation is stopped or after printing is finished. Then, the outer peripheral surface of the plate cylinder 73 is cleaned by the first spray nozzle 5, the second spray nozzle 6, and the brush roller 7 while being surrounded by the cleaning liquid recovery pan 8. Thereby, scattering of the cleaning liquid at the time of cleaning can be prevented.

  Moreover, the varnish adhering to the plate cylinder 73 can be removed by spraying the cleaning liquid onto the plate cylinder 73 by the first injection nozzle 5. Further, since the plate cylinder 73 on which the cleaning liquid is sprayed is rubbed by the brush roller 7, the plate cylinder 73 can be more reliably cleaned. In addition, the cleaning liquid sprayed from the first spray nozzle 5 is also applied to the brush roller 7 located below the first spray nozzle 5, and the brush roller 7 is also cleaned at the same time.

Further, the varnish adhering to the outer peripheral surface of the plate cylinder 73 can be completely removed by re-injecting the cleaning liquid onto the plate cylinder 73 by the second injection nozzle 6. The cleaning effect can be further enhanced by setting the pressure of the cleaning liquid sprayed from the second spray nozzle 6 higher than that of the first spray nozzle 5.
Then, the cleaning liquid remaining on the outer peripheral surface of the plate cylinder 73 can be completely sucked and collected by the cleaning liquid suction chamber 21 provided below the second injection nozzle 6 and returned to the storage tank 20. On the other hand, the cleaning liquid containing varnish and the like collected in the space 23 of the cleaning liquid recovery pan 8 is also sucked back to the storage tank 20, and the cleaning liquid returned to the storage tank 20 is purified, and then the first injection nozzle 5 and the second injection nozzle 6. The cleaning liquid can be circulated and reused by supplying to. As a result, it is possible to reduce the cost for the purchase and disposal of the cleaning liquid.

  Further, since the first spray nozzle 5 and the second spray nozzle 6 can change the spray direction of the cleaning liquid, if the spray is directed toward the brush roller 7, the brush roller 7 can be directly cleaned. is there. Here, both the first injection nozzle 5 and the second injection nozzle 6 can change the injection direction. Of course, only one of the first injection nozzle 5 and the second injection nozzle 6 has the injection direction. May be changed.

Here, an example of specific control of the cylinder cleaning apparatus will be described. The following control can be controlled by the control device described above.
First, during the printing operation, that is, when cleaning is not performed, the first injection nozzle 5, the second injection nozzle 6, the brush roller 7, and the cleaning liquid recovery pan 8 are arranged at positions separated from the plate cylinder 73, and the first injection nozzle The nozzles 5, the second injection nozzle 6, the brush roller 7, and the pumps 17 and 18 for sucking the cleaning liquid suction chamber 21 and the space 23 of the cleaning liquid recovery pan 8 are in an OFF state (in an inoperative state).

As shown in FIG. 5A, when washing is performed after the operation is stopped or after the printing is finished, the plate cylinder 73 is rotated at a slow speed (4 rpm). At this time, the pumps 17 and 18 are turned on (operating state), the cleaning liquid suction chamber 21 and the space 23 of the cleaning liquid recovery pan 8 are sucked, and the first injection nozzle 5, the second injection nozzle 6, and the brush roller 7. and moving the cleaning liquid recovery pan 8 in a direction to approach the outer peripheral surface of the plate cylinder 73 [the direction shown by the arrow D ₁ in FIGS. 5 (a)], a brush 14 of the cleaning liquid recovery pan 8 on the outer peripheral surface of the plate cylinder 73 Make contact.

Thereafter, as shown in FIG. 5B, when the tail end 75 a of the varnish plate 75 passes the brush roller 7, the first injection nozzle 5 and the brush roller 7 are turned on. At this time, the rotation direction of the brush roller 7 is the same as the rotation direction of the plate cylinder 73 and is rotated at a speed higher than the rotation speed of the plate cylinder 73 (for example, a speed of 150 rpm).
Then, as shown in FIG. 5C, when the tail end 75a of the varnish plate 75 passes through the cleaning liquid suction chamber 21 of the cleaning liquid recovery pan 8, the second injection nozzle 6 is also turned on, and the plate cylinder The first injection nozzle 5, the second injection nozzle 6, the brush roller 7, the pump 17, and the pump 18 are kept ON until 73 completes a round and the tail edge side end 75 b of the varnish plate 75 comes.

Then, as shown in FIG. 6A, the plate cylinder 73 goes around once and the tail edge side end portion 75 b of the varnish plate 75 passes immediately before the upper end portion of the cleaning liquid collection pan 8 (that is, the wrinkle of the varnish plate 75). The first spray nozzle 5 is turned off at a point immediately before the bottom end 75b enters the cleaning region surrounded by the cleaning liquid recovery pan 8.
After that, as shown in FIG. 6B, when the tail edge side end 75b of the varnish plate 75 passes through the first injection nozzle 5, the second injection nozzle 6 and the brush roller 7 are turned off.
Then, as shown in FIG. 6C, when the tail edge side end 75b of the varnish plate 75 passes through the cleaning liquid suction chamber 21 of the cleaning liquid recovery pan 8, the pump 17 and the pump 18 are turned off.

  Next, the same control as described above is repeated after setting the rotation direction when the brush roller 7 is turned ON to the direction opposite to the rotation direction of the plate cylinder 73. In this way, the rotation direction of the brush roller 7 during the second cleaning of the plate cylinder 73 is opposite to the rotation direction during the first cleaning of the plate cylinder 73, thereby providing the following effects. Is obtained. That is, for example, as shown in FIG. 7A, when the rotation direction of the brush roller 7 is the same as the rotation direction of the plate cylinder 73, the varnish plate 75 is angular when switching from the concave surface to the convex surface. The varnish adhering to the portion can be surely scraped and removed by the brush roller 7, and the rotation direction of the brush roller 7 is opposite to the rotation direction of the plate cylinder 73 as shown in FIG. In this case, even the varnish adhering to the angular portion when the convex surface of the varnish plate 75 is switched from the convex surface to the concave surface can be surely scraped and removed by the brush roller 7. Thus, the cleaning efficiency can be improved by changing the rotation direction of the brush roller 7 during the cleaning.

When the cleaning of the plate cylinder 73 of the second rotation is completed, the direction in which the first injection nozzle 5, the second injection nozzle 6, the brush roller 7 and the cleaning liquid recovery pan 8 are separated from the outer peripheral surface of the plate cylinder 73 [FIG. the arrow D ₁ shown in a) is moved in the opposite direction], allowed to stand until the next cleaning.
If a sufficient cleaning effect can be obtained by the first rotation of the plate cylinder 73, the second rotation of the plate cylinder 73 may not be performed. Further, the rotation direction of the brush roller 7 may always be the same direction. Further, during the cleaning of the plate cylinder 73, the cleaning liquid may be sprayed onto the brush roller 7 by the first spray nozzle 5 and / or the second spray nozzle 6 to clean the brush roller 7.

(B) Second Embodiment FIG. 8 is a view for explaining a cylinder cleaning device of a printing press as a second embodiment of the present invention, and is a side view showing an enlarged main portion thereof. In FIG. 8, the same parts as those in the conventional example and the first embodiment described above are indicated by the same reference numerals.
The cylinder cleaning apparatus according to the present embodiment is particularly different from the first embodiment in the configuration of the cleaning liquid recovery pan 8. Hereinafter, a different point from 1st Embodiment is demonstrated, and since it is the same as that of 1st Embodiment about the other structure, the description is abbreviate | omitted here.

  As shown in FIG. 8, in the present embodiment, a cleaning liquid suction chamber (a first cleaning chamber) that sucks the cleaning liquid present on the outer peripheral surface of the plate cylinder 73 at a position above the first injection nozzle 6 inside the cleaning liquid recovery pan 8. 2 suction chambers) 25 are provided. Specifically, a partition wall 24 is provided inside the cleaning liquid recovery pan 8, and the partition wall 24 allows the cleaning liquid recovery pan 8 to be separated into the cleaning liquid suction chamber 21, the cleaning liquid suction chamber 25, and other spaces ( That is, it is partitioned into a first injection nozzle 5, a second injection nozzle 6 and a space (where the brush roller 7 is disposed) 23. In addition, the partition wall 24 extends in the machine width direction of the plate cylinder 73 and is set to a length such that the tip portion does not interfere with the outer peripheral surface of the plate cylinder 73.

Further, a cleaning liquid discharge port 26 is provided at the bottom of the cleaning liquid suction chamber 25, and the cleaning liquid suction chamber 25 opened to the outer peripheral surface of the plate cylinder 73 is sucked by the pump 27. The cleaning liquid suction chamber 25 and the pump 27 constitute another cleaning liquid suction means in this way.
The cleaning liquid sucked and collected by the pump 27 is returned to the storage tank 20 and reused.

  Since the cylinder cleaning apparatus for a printing press as the second embodiment of the present invention is configured as described above, the same effects as those of the first embodiment can be obtained. In addition, since varnish and other deposits and cleaning liquid existing on the outer peripheral surface of the plate cylinder 73 are sucked by the cleaning liquid suction chamber 25, it is possible to prevent scattering of the cleaning liquid from the upper end of the cleaning liquid recovery pan 8 to the outside. effective.

(C) Third Embodiment FIG. 9 is a view for explaining a cylinder cleaning device for a printing press as a third embodiment of the present invention, and is a side view showing an enlarged main portion thereof. In FIG. 9, the same parts as those in the conventional example and the first embodiment described above are indicated by the same reference numerals.

The cylinder cleaning apparatus according to the present embodiment is particularly different from the first embodiment in the configuration of the cleaning liquid recovery pan 8. Hereinafter, a different point from 1st Embodiment is demonstrated, and since it is the same as that of 1st Embodiment about the other structure, the description is abbreviate | omitted here.
As shown in FIG. 9, in the present embodiment, a cleaning liquid ejection chamber 31 that ejects the cleaning liquid toward the outer peripheral surface of the plate cylinder 73 is provided between the cleaning liquid suction chamber 21 and the space 23 of the cleaning liquid recovery pan 8. Yes. Specifically, a partition wall 30 is provided inside the cleaning liquid recovery pan 8, and the partition wall 30 allows the cleaning liquid recovery pan 8 to move inside the cleaning liquid suction chamber 21, the cleaning liquid ejection chamber 31, and other spaces ( That is, it is partitioned into a first injection nozzle 5, a second injection nozzle 6 and a space (where the brush roller 7 is disposed) 23. The partition wall 30 extends in the machine width direction of the plate cylinder 73 and is set to a length such that the tip portion does not interfere with the outer peripheral surface of the plate cylinder 73.

  Further, a cleaning liquid supply port 32 is provided at the bottom of the cleaning liquid injection chamber 31, and the cleaning liquid in the storage tank 20 is supplied by the pump 19 to the cleaning liquid injection chamber 31 opened to the outer peripheral surface of the plate cylinder 73. It is like that. As described above, the cleaning liquid ejection chamber 31 is provided immediately above the cleaning liquid suction chamber 21 and adjacent to the cleaning liquid suction chamber 21, thereby allowing the cleaning liquid sprayed from the cleaning liquid ejection chamber 31 to the outer peripheral surface of the plate cylinder 73. The cleaning liquid suction chamber 21 can be immediately sucked. The third cleaning liquid ejecting means according to the present invention includes the cleaning liquid ejecting chamber 31 and the pump 19 described above.

The cleaning liquid sprayed from the cleaning liquid spray chamber 31 to the outer peripheral surface of the plate cylinder 73 is sucked from the cleaning liquid suction chamber 21 and returned to the storage tank 20 for reuse.
Since the cylinder cleaning device for a printing press as the third embodiment of the present invention is configured as described above, the same effects as those of the first embodiment can be obtained. Further, in addition to the first spray nozzle 5 and the second spray nozzle 6, the cleaning liquid is sprayed from the cleaning liquid spray chamber 31, so that the cleaning efficiency of the outer peripheral surface of the plate cylinder 73 can be further improved.

  In addition, a dedicated pump for supplying the cleaning liquid to the cleaning liquid injection chamber 31 is separately provided, and the supply timing of the cleaning liquid to the cleaning liquid injection chamber 31 by this dedicated pump and the first injection nozzle 5 and the second injection nozzle 6 by the pump 19 are provided. The cleaning liquid supply timing may be controlled separately.

(D) Others Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the brush roller 7 may be rotated while slightly vibrating in the machine width direction. In this way, it can be expected that the cleaning efficiency is further increased.
Further, instead of the brush 14 of the cleaning liquid collection pan 8, a sponge may be provided.
Further, two brush rollers 7 may be provided in parallel (up and down). In this case, if these two brush rollers 7 are rotated in opposite directions, a sufficient cleaning effect can be obtained with one rotation of the plate cylinder 73. Further, if the second brush roller 7 or both brush rollers 7 are small-sized brush rollers having a smaller diameter, it is possible to avoid an increase in size of the apparatus.

Furthermore, you may comprise combining 2nd Embodiment and 3rd Embodiment. That is, the cylinder cleaning apparatus according to the first embodiment is provided with the cleaning liquid suction chamber 25 of the second embodiment and the cleaning liquid injection chamber 31 of the third embodiment.
In the above embodiment, as an example, the case where the present cylinder cleaning device is used to clean a plate cylinder (cylinder) provided in a coating unit of a sheet-fed printing machine has been described. Needless to say, it can be used for cleaning other cylinders such as a plate cylinder and a blanket cylinder.

It is a side view which expands and shows the principal part of the cylinder cleaning apparatus of the printing press concerning 1st Embodiment of this invention. A diagram for explaining cylinder cleaning device of a printing press to a first embodiment of the present invention, FIG. 2 (a) contacting the brush and the brush roller relative to the plate cylinder when viewed from the A ₁ direction shown in FIG. 3 shows a region schematically, FIG. 2 (b) is an arrow view as viewed from the a ₂ direction shown in FIG. It is a side view which shows the coating unit of the printing press concerning 1st Embodiment of this invention. FIGS. 4A and 4B are diagrams for explaining a cylinder cleaning device for a printing press according to the first embodiment of the present invention, in which FIG. 4A is a top view of a cleaning liquid injection nozzle, and FIG. It is B sectional drawing. FIG. 5A to FIG. 5C are diagrams for explaining the operation of the cylinder cleaning device. FIG. 5A to FIG. 5C are diagrams for explaining the cylinder cleaning device of the printing press according to the first embodiment of the present invention. FIG. 6A to FIG. 6C are diagrams for explaining the operation of the cylinder cleaning device. FIG. 6A to FIG. 6C are diagrams for explaining the cylinder cleaning device of the printing press according to the first embodiment of the present invention. FIG. 7A is a diagram for explaining a cylinder cleaning device for a printing press according to the first embodiment of the present invention, and FIG. 7A is a schematic diagram showing a state in which the brush roller rotates in the same direction as the rotation direction of the plate cylinder. FIG. 7B is a schematic diagram showing a state in which the brush roller is rotating in the direction opposite to the rotation direction of the plate cylinder. It is a side view which expands and shows the principal part of the cylinder washing | cleaning apparatus of the printing press as 2nd Embodiment of this invention. It is a side view which expands and shows the principal part of the cylinder washing | cleaning apparatus of the printing press as 3rd Embodiment of this invention. It is a schematic block diagram which shows the conventional single-sided printing type sheet-fed printing machine. It is a side view which shows the coating unit of the conventional sheet-fed printing press. It is a figure for demonstrating the subject of a prior art.

Explanation of symbols

1 sheet 5 first injection nozzle (first cleaning liquid injection means)
6 Second injection nozzle (second cleaning liquid injection means)
7 Brush roller 7a Rotating roller 7b Brush (flexible member)
8 Cleaning liquid recovery pan (cleaning liquid splash prevention member)
8a Opening 8b Bottom of the cleaning liquid recovery pan 9 Cleaning liquid circulation device 10 Pipe (second cylindrical member)
10a hole 11 pipe (first cylindrical member)
11a Injection hole 12 Peripheral part 13 Bolt 14 Brush (flexible member)
15, 16 Discharge port 17, 18 Pump (suction pump)
19, 27 Pump (supply pump)
20 Storage tank 21 Cleaning liquid suction chamber (suction chamber or first suction chamber)
22 partition wall 23 space 24 partition wall 25 cleaning liquid suction chamber (second suction chamber)
26 discharge port 30 partition wall 31 cleaning liquid injection chamber 32 supply port 51 sheet supply device 51a paper feed table 52a to 52d printing unit 53 printing device 54 coating unit 55 sheet conveying device 55a drying device 56 sheet stacking device 56a discharge table 57a endless Chain 60 Plate cylinder 61 Printing plate 62 Blanket cylinder 63 Impression cylinder 64 Intermediate cylinder 70 Varnish boat 71 Varnish roller 72 Varnish roller 73 Plate cylinder (cylinder)
73a Gap 74 Impression cylinder 75 Varnish plate (letter plate)
75a End side of varnish plate (one end)
75b The tail edge side of the varnish plate (the other end)
80 Cleaning liquid injection nozzle 81 Brush roll

Claims (11)

A cylinder cleaning device for a printing press for cleaning the outer peripheral surface of a cylinder provided in the printing press,
A first cleaning liquid ejecting means that is provided in the vicinity of the outer peripheral surface of the cylinder and injects a cleaning liquid onto the outer peripheral surface of the cylinder;
A brush roller provided below the first cleaning liquid ejecting means and capable of rotating in contact with the outer peripheral surface of the cylinder;
An opening is formed on the side facing the outer peripheral surface of the cylinder, the first cleaning liquid ejecting means and the brush roller are covered from the outer periphery of the cylinder, and the opening is closed by the outer peripheral surface of the cylinder. A cylinder cleaning apparatus for a printing press, comprising a cleaning liquid scattering preventing member for preventing scattering. 2. The cylinder cleaning apparatus for a printing press according to claim 1, wherein a flexible member is provided on the entire periphery of the opening of the cleaning liquid scattering preventing member. 3. A cylinder cleaning apparatus for a printing press according to claim 1, further comprising cleaning liquid suction means for sucking cleaning liquid present on the outer peripheral surface of the cylinder. 4. The cylinder cleaning device for a printing press according to claim 3, wherein the cleaning liquid suction means is provided inside the cleaning liquid scattering prevention member and below the brush roller. The cleaning liquid suction means
A suction chamber open to the outer peripheral surface of the cylinder;
The cylinder cleaning apparatus for a printing press according to claim 3 or 4, further comprising a suction pump for sucking the suction chamber. 6. A second cleaning liquid ejecting means that is provided below the brush roller and above the cleaning liquid suction means and that injects the cleaning liquid onto the outer peripheral surface of the cylinder. A cylinder cleaning device for a printing press as described. 7. The cylinder cleaning apparatus for a printing press according to claim 6, wherein at least one of the first cleaning liquid ejecting means and the second cleaning liquid ejecting means is configured to be capable of changing the direction in which the cleaning liquid is ejected. The cylinder cleaning device for a printing press according to any one of claims 1 to 7, wherein the brush roller is configured to rotate in the same direction and in the opposite direction to the rotation direction of the cylinder. . 9. A cleaning liquid circulating device for recovering and reusing the cleaning liquid sprayed from at least one of the first cleaning liquid spraying means and the second cleaning liquid spraying means is provided. A cylinder cleaning device for a printing press according to any one of the preceding claims. 10. A third cleaning liquid ejecting means that is provided immediately above the cleaning liquid suction means and adjacent to the cleaning liquid suction means, and jets the cleaning liquid to the outer peripheral surface of the cylinder. A cylinder cleaning device for a printing press according to any one of the above. The cylinder cleaning device for a printing press according to any one of claims 1 to 10, wherein the cylinder is a plate cylinder provided in a coating unit and having a varnish plate wound around the surface thereof.

Images