JP2018103600A - Anilox roll washing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide anilox roll washing equipment which does not use a liquid medicine, which does not apply thermal breakage to a base material, and in which washing unevenness is not generated and having high quality.SOLUTION: Anilox roll washing equipment comprises: a laser radiation head 8 for radiating laser to a washing execution portion from a radiation direction opening part (condenser lens) of a laser; and a control part 9 for controlling driving of the laser radiation head 8, in which, the washing execution portion 23 of an anilox roll 2 can be scanned by the laser beam L radiated from the laser radiation head 8 for washing reproduction, without detaching the anilox roll 2 from a printer, and in a roll surface washing time, the control part 9 controls the laser radiation head 8 in a heating condition in which, thermal breakage is not applied to a base material forming a cell on the radiation portion of the laser spot, and only an ink residue is removed by evaporation or sublimation.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an anilox roll cleaning device for cleaning an anilox roll used as an ink metering roller in a flexographic printing machine, and more specifically, a cell (small hole for ink reservoir) covering the roll surface of an anilox roll. The present invention relates to an anilox roll cleaning apparatus for cleaning and regeneration.

In a flexographic printing machine, as shown in FIG. 15, an anilox roll 2 is widely employed as an ink metering means for determining the film thickness, viscosity, and uniformity of the ink transferred to the relief printing plate cylinder 1.
This type of anilox roll 2 is a cylindrical body whose roll surface is covered with a ceramic coating or chrome plating. The roll surface has substantially the same shape and the same depth so that a constant amount of ink can always be supplied to the plate cylinder. A large number of cells having the same thickness are evenly arranged as a minute ink reservoir, for example, at a rate of 200 to 1200 cells per inch.

  In FIG. 15, reference numeral 3 is a rubber roll (fountain roll) that is suspended from an ink pan and applies ink to the anilox roll 2, and reference numeral 4 is a cardboard, film, cloth, or the like that applies an appropriate printing pressure to the plate cylinder 1. An impression cylinder for transferring ink to the printing medium 5 and a reference numeral 6 are conveying rolls.

  In such an anilox roll 2, since the ink supplied from the rubber roll 3 is held only inside the cell, the ink supply amount (transfer amount) to the plate cylinder 1 is controlled by the cell volume. The film thickness and viscosity of the ink transferred to 1 can be determined uniformly.

  By the way, the anilox roll has a problem that, if the maintenance of the roll surface is neglected, the residue of ink and varnish is solidified and clogging occurs in the cell. When clogged, the ink storage capacity of the cell is reduced, so that the amount of ink supplied to the plate cylinder and, consequently, the printing density on the printing medium such as cardboard is reduced. Therefore, periodic cleaning of the roll surface after printing is indispensable in order to fully utilize the excellent performance of the anilox roll.

  For the roll surface cleaning of anilox rolls, a solvent-free and environment-friendly dry ice cleaning method has recently become widespread instead of the solvent cleaning method (Non-Patent Document 1). Dry ice cleaning is a method of cleaning by spraying dry ice particles onto the surface of a cleaning object using compressed air of a compressor (Non-patent Document 2).

http://www.pm-service.co.jp/service/service2.html Anilox roll cleaning https://en.wikipedia.org/wiki/Dry ice cleaning

    However, the dry ice cleaning method has the following disadvantages. First, since a large amount of compressed air is used, a compressor of a corresponding scale and a dedicated cold storage container for storing dry ice pellets are required, so there is a limit to downsizing the apparatus. Nozzle noise is also generated. Furthermore, as a health problem, it cannot be used in a premise environment that is not only deficient in oxygen but also easily filled with carbon dioxide, and measures against dust generated during spraying are indispensable. Furthermore, there is also a problem in work that it is not easy to accurately spray dry ice on the area to be cleaned, and skill is required.

The present invention has been made in view of the above circumstances, and has as its first object to provide an anilox roll cleaning device which is solvent-free, has no oxygen deficiency, no carbon dioxide poisoning, no noise, and is environmentally friendly. .
Another object of the present invention is to provide an anilox roll cleaning device that can be carried in easily and that can perform a cleaning operation without disturbing the operation of peripheral equipment.
It is a third object of the present invention to provide an anilox roll cleaning device that is easy to use and does not require a complicated operation of “removing the anilox roll from the printing press”.

Another object of the present invention is to provide an anilox roll cleaning apparatus that can efficiently and uniformly remove only the residue in the cell without damaging the base material.
It is a fifth object of the present invention to provide an anilox roll cleaning device that is easy to use, safe and secure and does not place an excessive physical burden on the operator.

In order to solve the above-mentioned problem, the invention described in claim 1 is directed to a light source unit that outputs a laser beam under a predetermined output condition, and the laser beam output from the light source unit is condensed to have a predetermined power density. Laser irradiation head comprising a condensing optical system that generates a laser spot and a spot scanning system that sequentially heats an irradiation site by scanning the roll surface of an anilox roll in which a number of cells to be cleaned are arranged with the laser spot And an anilox roll cleaning device configured to clean the roll surface while the anilox roll is still attached to a printing press, the control unit controlling the drive of the laser irradiation head, At the time of cleaning, the control unit removes only the ink residue without thermally damaging the base material forming the cell at the irradiated portion of the laser spot. Melting, the heating conditions to remove by evaporation or sublimation, and controls the laser irradiation head is characterized by being made to the configuration.
The anilox roll in this invention is a concept that refers to all ink metering rollers whose roll surfaces are covered with cells, regardless of their names.

  The invention according to claim 2 relates to the anilox roll cleaning apparatus according to claim 1, and when the spot scanning system operates at a turnaround point of reciprocating scanning and in the vicinity thereof, irradiation of the laser spot to the roll surface is performed. It is characterized in that a masking means for shutting off or stopping or weakening is provided.

  According to a third aspect of the present invention, there is provided the anilox roll cleaning apparatus according to the second aspect, wherein the spot scanning system includes a galvano scanner for reciprocating a laser by shaking a mirror at a predetermined frequency and a predetermined angle range. In addition, it is characterized in that a masking means is provided to block, stop or weaken the irradiation of the laser spot on the roll surface when the mirror reaches the maximum touch angle and the vicinity thereof.

  According to a fourth aspect of the invention, there is provided the anilox roll cleaning apparatus according to the second or third aspect, wherein the masking means comprises an electric signal system, and the spot scanning system comprises a turnaround point of reciprocating scanning and its vicinity. When the mirror is operated, or when the mirror is positioned at or near the maximum touch angle, a masking signal is generated to stop or reduce the output of the laser beam.

  The invention according to claim 5 relates to the anilox roll cleaning apparatus according to claim 2 or 3, wherein the masking means is made of a mask member which is not easily damaged by a laser spot, and the spot scanning system is The mask member blocks irradiation of the laser spot to the roll surface when operating at a turnaround point of the reciprocating scan and the vicinity thereof, or when the mirror is positioned at and near the maximum touch angle. Yes.

  A sixth aspect of the present invention relates to the anilox roll cleaning apparatus according to any one of the first to fifth aspects, wherein the laser irradiation head guides and moves along the length direction of the roll surface. It is characterized by the provision of rails.

  The invention according to claim 7 relates to the anilox roll cleaning device according to claim 6, wherein the guide rail is composed of an elevated rail mechanism having a height adjusting function independently at both ends. Yes.

  The invention according to claim 8 relates to the anilox roll cleaning device according to any one of claims 1 to 5, wherein the laser irradiation head has a handle for an operator to perform a cleaning operation by hand. It is characterized by being equipped.

  The invention according to claim 9 relates to the anilox roll cleaning device according to any one of claims 1 to 8, and is driven to rotate by the rotation of the anilox roll when abutting on the roll surface. The laser irradiation head includes a single or a plurality of rotating bodies, and the laser irradiation head generates a laser spot at an irradiation site of the roll surface while the rotating body is in contact with an anilox roll and rotated following the roll surface cleaning. It is characterized in that it is made to scan.

  The invention according to claim 10 relates to the anilox roll cleaning apparatus according to claim 9, wherein the rotation of the anilox roll is stopped when the roll body is separated from the roll surface during the cleaning of the roll surface. Alternatively, an output emergency stop means for stopping the output of the laser beam in an emergency when there is a sudden decrease is provided.

  The invention according to claim 11 relates to the anilox roll cleaning apparatus according to claim 10, wherein the rotating body is removed from the roll surface during cleaning of the roll surface by monitoring or measuring the rotation of the rotating body. An emergency detection means is provided for detecting the separation or the rotation of the anilox roll being stopped or suddenly reduced.

  A twelfth aspect of the present invention relates to the anilox roll cleaning apparatus according to any one of the first to eleventh aspects, and further includes a movement monitoring unit that detects a movement speed or a degree of movement speed of the laser irradiation head. When the operator is holding the laser irradiation head by hand or moving the guide rail on the guide rail in the longitudinal direction of the roll surface, The driving of the laser irradiation head is controlled based on the detection result.

  The invention according to claim 13 relates to the anilox roll cleaning apparatus according to claim 12, and when the movement monitoring means detects that the moving speed is high, the laser output is increased or the scanning frequency is increased. When it is detected that the moving speed is slow, control is performed to lower the laser output or lower the scanning frequency.

According to the configuration of the present invention, there is no need for a solvent, there is no fear of oxygen deficiency, gas poisoning, and no noise is generated. Therefore, an environment-friendly anilox roll cleaning device that does not affect the operation of the surroundings can be realized.
Moreover, it can carry in easily and can complete | finish a washing | cleaning operation simply and in a short time, without removing an anilox roll from a printing press.
Further, since only the residue in the cell can be removed by melting, evaporation or sublimation without damaging the base material, the cleaning efficiency can be further improved.
In addition, since it does not place an excessive physical burden on the operator, an easy-to-use, safe and secure anilox roll cleaning device can be realized.
Moreover, since uneven cleaning does not occur, a high-quality reproduction roll can be obtained.

It is a figure which shows schematic structure of the anilox roll washing | cleaning apparatus which is 1st Embodiment of this invention, and is a figure with which description of the use condition is provided. It is a figure which shows the whole structure of a flexographic printing machine, and is a figure with which it uses for description of the use condition of the same anilox roll washing | cleaning apparatus. It is a typical enlarged view which shows typically the cross-sectional shape of the cell along the axial direction of an anilox roll, The figure (a) is the state of clogging before washing | cleaning a cell, The figure (b) is the anilox roll. The state of the cell after washing | cleaning using the washing | cleaning apparatus is shown. It is a figure which shows another example of use of the same anilox roll washing | cleaning apparatus. It is a figure which shows schematic structure of the anilox roll washing | cleaning apparatus which is 2nd Embodiment of this invention, and is a figure with which it uses for description of the use condition. It is a figure which shows schematic structure of the anilox roll washing | cleaning apparatus which is 3rd Embodiment of this invention, and is a figure with which it uses for description of the use condition. It is a perspective view which shows schematic structure of the anilox roll washing | cleaning apparatus which is 4th Embodiment of this invention. It is a perspective view which shows roughly the mechanical structure of the masking means applied to the anilox roll washing | cleaning apparatus which is 5th Embodiment of this invention, and is a figure with which description of the operation | movement is provided. In this embodiment, during the operation of the galvano scanner, an overheating phenomenon that occurs in a section where the deflection angle of the mirror changes in a non-linear manner, and an operation explanation for overcoming the thermal detrimental effect on the base material by this overheating phenomenon are provided. FIG. It is an electrical block diagram which shows roughly the electrical structure of the masking means applied to the anilox roll washing | cleaning apparatus which is 6th Embodiment of this invention. It is a time chart used for description of operation | movement of the embodiment. It is a perspective view which shows the structure of the anilox roll washing | cleaning apparatus which is 7th Embodiment of this invention. It is a perspective view which expands and shows the principal part of the embodiment. 2 is an electrical block diagram schematically illustrating an electrical configuration of the embodiment. FIG. It is a schematic block diagram of the flexographic printing machine provided for description of background art.

In a preferred embodiment of the present invention, the laser irradiation head is provided with left and right wheels for sliding or moving on the roll surface of the anilox roll while supporting the head body. The condensing lens of the condensing optical system condenses the laser beam and attaches the laser spot on the roll surface. It is optically arranged and configured so as to ensure an optimal optical path length for imaging.
In addition, a galvano scanner is used as a spot scanning system for reciprocating scanning of a laser by shaking a mirror at a predetermined frequency and a predetermined angle range. Further, when the galvano scanner mirror reaches the maximum touch angle and the vicinity thereof, it is provided with a masking means for blocking, stopping or weakening the irradiation of the laser spot on the roll surface.

Embodiment 1

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a schematic configuration of an anilox roll cleaning apparatus according to a first embodiment of the present invention, and is a diagram used for explaining the usage state. FIG. 2 shows an overall configuration of a flexographic printing machine. FIG. 3 is a schematic enlarged view schematically showing the cross-sectional shape of the cell along the axial direction of the anilox roll 2. FIG. 4A shows a clogged state before the cell is washed, and FIG. 4B shows a cell state after washing using the anilox roll washing apparatus.

  First, as shown in FIG. 2, the flexographic printing machine has a plate cylinder 1 wound with a flexible relief printing plate made of rubber or synthetic resin, and an appropriate amount of ink transferred to the plate cylinder 1. An anilox roll 2, a rubber roll (fountain roll) 3 that is suspended by an ink pan (not shown) and applies ink to the roll surface (cell) of the anilox roll 2, and an appropriate printing pressure is applied to the plate cylinder 1 to corrugated cardboard, film or cloth The impression cylinder 4 is configured to transfer ink to the printing medium 5 such as the above and a transport roll 6. The roll diameter of Anilox roll 2 is known to be 40-600φmm, and the roll surface length is long and 600cm, but this invention is anilox of any size and length. It can also be applied to roll 2.

  As shown in FIG. 3, the anilox roll 2 of this embodiment is a cylindrical body whose roll surface is covered with a ceramic coating 21, and cells 22, 22,. Are evenly arranged in a size of about 100 microns.

  Next, as shown in FIGS. 1 and 2, the anilox roll cleaning apparatus according to this embodiment includes an anilox roll 2 and an adjacent roll (plate cylinder 1 and rubber roll) to be cleaned without removing the anilox roll 2 from the flexographic printing machine. 3) A portable cleaning device that releases the contact state with 3), scans and cleans the cleaning site (irradiation site) 23 of the anilox roll 2 with the laser beam L, and collects it at the opening of the head body. A laser irradiation head which is provided with an optical lens 7 and performs spot irradiation by focusing a laser beam L at a high power density on a cleaning construction site (roll surface, cell forming surface) 23 of the anilox roll 2 from the condensing lens 7 8, a control unit 9 that controls driving of the laser irradiation head 8, and a cell 22 by high-power density spot irradiation with a laser beam. 22, removed from ... in ink and debris varnish R and a vacuum cleaner 10 for sucking the exhaust (Figure 3) are schematic configuration. The vacuum cleaner 10 may be configured to be indirectly or directly coupled to the laser irradiation head (main body) 8 so as to move in accordance with the movement of the laser irradiation head 8.

  The laser irradiation head 8 generates a laser spot having a predetermined power density by condensing the laser beam L output from the YAG laser oscillator (light source unit) (not shown) as a high energy density heat source and the laser oscillator. And a galvano scanner (spot scanning system) that scans the roll surface (cell forming surface) of the anilox roll to be cleaned with a laser spot and sequentially heats the irradiated portion (for example, a spot scanning system) (for example, Wavelength 1062 nm, laser output 70 W / 50 W / 38 W, laser pulse frequency 1-120 kHz, maximum laser scan width 66/108/172 mm, scan frequency range 1-1000 Hz (preferably 100-600 Hz)). Further, the control unit 9 melts, evaporates or sublimates the ink or varnish residue R adhering in the cells 22, 22,... Of the anilox roll 2 according to various condition settings, while not damaging the surface of the anilox roll 2. Thus, the laser irradiation head 8 is driven and controlled.

In this embodiment, as shown in FIG. 1, the laser irradiation head 8 is configured as a handy type provided with a handle 11 for an operator to perform a cleaning operation with his / her hand.
In the laser irradiation head 8, legs 12, 12,... Having a predetermined length are suspended from the four corners of the frame of the head body. Wheels (rotating bodies) 13 for sliding or moving on the roll surface of the anilox roll 2 while supporting the head body are provided at the lower ends of the leg portions 12. The wheel 13 is preferably made of a cushioning material, for example, a rubber tire so as not to damage the base material on the roll surface.
As described above, each wheel 13 is attached to the tip portion of each leg portion suspended from the lower four corners of the head body, so that the condensing lens of the condensing optical system condenses the laser beam, It is optically arranged and configured so as to ensure an optimum optical path length for forming a laser spot imaging surface on the roll surface. The length of each leg portion 12 is set to be the same, and the shape and diameter of the wheel are also set to be the same.

  The leg portion 12 is configured to be adjustable in length (expandable or refractable) so that a spot imaging surface can be formed on the roll surface in accordance with the roll diameter of the anilox roll 2 to be cleaned. Is preferred. Moreover, it is good also as a structure which can change the position where the wheel 13 is attached to the leg part 12 up and down instead of changing the length of the said leg part 12. As shown in FIG. In addition, it may replace with the leg part 12 and you may make it attach the wheel 13, 13, ... to a frame or a support plate. The wheel 13 is not limited to a rubber tire, and a metal wheel or a synthetic resin wheel may be used as necessary.

  Here, the front wheel 13 and the rear wheel 13 on the left side in the moving direction are arranged so as to be able to slide or move on the same first virtual straight line. Similarly, the front wheel 13 and the rear wheel 13 on the right side in the moving direction are the same. The optical axis of the condenser lens 7, which is an opening for laser beam irradiation, is arranged so as to be able to slide or move on the second imaginary straight line, and connects the midpoint between the first and second imaginary straight lines. Although it is preferable to arrange at a position passing through the virtual line, it is not limited to this. Furthermore, the four wheels 13, 13,... Are provided so as to be positioned at each corner (vertex) of the virtual rectangle, and the optical axis of the condenser lens 7 is orthogonal to the rotation axis of the wheel. However, the present invention is not limited to this.

  Next, in order to clean the anilox roll 2 using the anilox roll cleaning device having the above-described configuration, as shown in FIG. 2, the contact between the anilox roll 2 to be cleaned and the adjacent rolls (the plate cylinder 1 and the rubber roll 3). The state is released, and an operator (not shown) grips the handle 11, and as shown in FIG. 1, the laser irradiation head (main body) 8 is rotated to stop the anilox roll 2 being cleaned (roll surface, cell formation). Surface) 23. At this time, the traveling direction of the wheels is adjusted to the axial direction of the anilox roll 2. When all the wheels 13, 13,... Are in contact with the surface of the anilox roll 2, the optical axis of the laser irradiation head 8 (when the deflection angle of the galvano scanner is 0) is Since the time coincides with the line direction, the laser beam can be evenly scanned left and right without the laser beam being biased to the left or right. Therefore, high quality cleaning can be performed.

  At the time of cleaning the anilox roll, as shown by the arrow A in FIG. 1, the operator is driving while sliding the wheels 13, 13,. When the laser irradiation head 8 is moved at a predetermined speed, the cleaning of the belt-shaped cleaning application site 23 determined by the set scanning width proceeds in the longitudinal direction according to the moving speed. When the cleaning to the other end in the longitudinal direction of the roll surface is completed, the anilox roll 2 is rotated by a predetermined amount, moved to the adjacent belt-shaped cleaning construction site 23, and the above-described construction work is performed. Complete cleaning of the entire cell forming surface.

  According to this configuration, there is no need for a solvent, there is no fear of oxygen deficiency, gas poisoning, and no noise is generated, so that an environment-friendly anilox roll cleaning device that does not affect the operation of the surroundings can be realized. Moreover, it can carry in easily and can complete | finish a washing | cleaning operation simply and in a short time, without removing an anilox roll from a printing press. Further, since only the residue in the cell can be removed by melting, evaporation or sublimation without damaging the base material, the cleaning efficiency can be further improved. In addition, since it does not place an excessive physical burden on the operator, an easy-to-use, safe and secure anilox roll cleaning device can be realized.

FIG. 4 is a diagram showing another example of use of the anilox roll cleaning apparatus. The usage example of FIG. 4 differs from the usage example of FIG. 1 in that the usage example of FIG. 1 performs reciprocal spot scanning along the circumferential direction of the roll surface while the anilox roll 2 is stationary. In the example of use in FIG. 4, the anilox roll 2 is fixed while the head moving method is adopted in which the head moves forward in the longitudinal direction and reaches the other end, and then shifts to the adjacent cleaning portion and repeats the cleaning. A roll rotation method is employed in which reciprocating spot scanning along the longitudinal direction of the roll surface is performed while moving at a low speed in the longitudinal direction of the roll surface while rotating at high speed.
The wheels 13, 13,... Of this use example function as a driven rotating body that is driven to rotate by constant speed idling (idling) of the anilox roll when being brought into contact with the roll surface. The wheels 13, 13,... Are in contact with the roll surface of the anilox roll and are driven to rotate so that a laser spot is generated and scanned at the irradiated portion of the roll surface.

  According to this usage example, the operator simply places and holds the laser irradiation head 8 on the roll surface of the anilox roll 2 in the idling state, and the cleaning of the cleaning site 23 progresses in a ring shape. So you can escape from excessive physical burden. Therefore, an easy-to-use, safe and secure anilox roll cleaning device can be realized.

Embodiment 2

FIG. 5 is a diagram showing a schematic configuration of an anilox roll cleaning apparatus according to the second embodiment of the present invention, and is a diagram provided for explaining a use state thereof.
The laser irradiation head 8a of this embodiment differs from the laser irradiation head 8 in FIG. 1 in that the legs 12a, 12a,... Are inclined as far as possible toward the axis of the anilox roll 2. It is a point that has been established. If it arrange | positions in this way, wheel 13a, 13a, ... can be rotated stably and cleaning quality can be improved.

Embodiment 3

FIG. 6 is a diagram showing a schematic configuration of an anilox roll cleaning apparatus according to a third embodiment of the present invention, and is a diagram provided for explaining a use state thereof.
In this embodiment, a guide rail 14 for guiding and moving the laser irradiation head 8 along the length direction of the anilox roll 2 is provided. The guide rail 14 is configured to be fixed to a stable base (for example, a solid frame of a printing facility) by an on / off type strong attracting magnet (not shown). A stand 15 for supporting the laser irradiation head 8 is erected on the guide rail 14 so as to be slidable on the guide rail 14. On the stand 15, an arm 16 extends in a lateral direction so as to be freely bent. The arm 16 may be configured to be extensible, or may be a bendable two-joint arm, and is preferably attached to the stand 15 so that the height can be adjusted. In order to move the laser irradiation head 8 along the guide rail 14, the laser irradiation head 8 may be moved manually as necessary, or may be driven by a motor without relying on manual operation.

In the above configuration, the operator abuts the wheels 13, 13,... On the roll surface in a state where the arm 16 extending from the stand 15 holds the laser irradiation head 8 at the optimum inclination angle. In this state, the laser irradiation head 8 is driven to clean and regenerate the anilox roll 2.
In this cleaning operation, as shown in FIG. 1, it can be applied to a head moving method in which the anilox roll 2 is stopped and the laser irradiation head 8 performs reciprocal spot scanning in the circumferential direction of the roll surface. As shown in FIG. 6, the roll rotation method is also applicable in which the laser irradiation head 8 is scanned back and forth in the longitudinal direction of the roll surface while the anilox roll 2 is idling at a constant speed. In either method, the laser irradiation head 8 is moved in the longitudinal direction of the roll surface along the guide rail 14 while performing reciprocating spot scanning. In the roll rotation method, the peripheral speed of the roll surface is set to a relatively high speed (for example, 800 mm / sec), and the longitudinal movement speed along the guide rail 14 of the laser irradiation head 8 is set to a relatively low speed (for example, 5 mm / second). (sec), the cleaning operation proceeds while drawing a spiral trajectory on the roll surface.

According to this embodiment, the physical burden on the operator can be further reduced.
As a modification of this embodiment, the moving wheel mechanism (FIG. 6) can be eliminated and the irradiation posture of the laser irradiation head 8 can be supported by the stand 15 and the arm 16. In this modification, the cleaning operation is developed by moving the laser irradiation head 8 on the guide rail 14 in a state of facing the roll surface in a non-contact manner.

Embodiment 4

FIG. 7 is a perspective view showing a schematic configuration of an anilox roll cleaning apparatus according to the fourth embodiment of the present invention.
In this embodiment, as shown in the figure, an elevated rail mechanism 17 is employed, and a cleaning device main body 19 is suspended from an elevated guide rail 18 in a suspended manner. This is different from the third embodiment.
First, the cleaning device main body 19 is roughly configured by a traveling mechanism unit 20 that can self-propelled forward and backward on an elevated guide rail 18, a head unit 21, a wheel unit 22, and a protective cover unit 23. ing. The head part 21, the protective cover part 23, and the wheel part 22 are arranged in such a manner as to hang from the traveling mechanism part 20 in this order.
The travel mechanism unit 20 includes a forward / reverse drive motor that is driven according to a control signal output from a movement control unit (not shown), a drive wheel that travels on the guide rail 18 by receiving power from the drive motor, and a driven wheel. And an upper frame body 24 for mounting these parts.

The head unit 21 has a laser irradiation head 25 including a laser oscillator (light source unit), a condensing optical system, and a galvano scanner (spot scanning system), and an opening through which a laser beam output from the laser irradiation head 25 passes. And a mounting frame body 26 for mounting and mounting the laser irradiation head 25 detachably. Here, the laser irradiation head 25 may have the same configuration and performance characteristics as the laser irradiation head 8 employed in the first embodiment (FIG. 1), or may be different.
The wheel portion 22 is in contact with the roll surface of the anilox roll, and four cylindrical (or columnar) rollers 13b that are driven to rotate according to the rotation of the anilox roll, and a lower frame for pivotally supporting these rolls. And a body 27.

The protective cover portion 23 is a light shielding plate that covers the optical path of the laser beam, and is also a support member that supports the wheel portion 22 that hangs down from the head portion 21.
Here, the vertical length of the protective cover portion 23 is set to an optimum distance so that the condensing lens of the condensing optical system condenses the laser beam and forms an image formation surface of the laser spot on the roll surface. Has been.

Next, the elevated rail mechanism 17 includes a pair of support pillars 28 and 28 for laying the guide rail 18 and the support pillars 28 and 28 as a stable base (for example, a solid frame of a printing facility). On / off type strong attracting magnets 29 and 29 for fixing are provided. The support pillars 28 and 28 are provided with height adjusting functions 30 and 30 for adjusting the installation height independently for the convenience of installation.
Also according to this embodiment, the same effect as described above in the third embodiment can be obtained. In addition, in the third embodiment, the arm and the stand are moved together with the laser irradiation head 25. However, in this embodiment, it is not necessary to run the arm and the stand, so that the load on the drive motor can be remarkably reduced.

Embodiment 5

  FIG. 8 is a perspective view schematically showing the mechanical configuration of the masking means applied to the anilox roll cleaning apparatus according to the fifth embodiment of the present invention, as well as a diagram for explaining the operation thereof, and FIG. 9 illustrates an overheating phenomenon that occurs in a section where the deflection angle of the mirror changes nonlinearly during operation of the galvano scanner, and an operation explanation for overcoming the thermal detrimental effects of the overheating phenomenon on the base material. FIG.

  The anilox roll cleaning apparatus of this embodiment can be applied to any of the usage examples of the first to fourth embodiments (FIGS. 1 and 4 to 7), and will be described with reference to FIG. 4 for convenience. A laser oscillator that outputs a laser beam L under a predetermined output condition; a condensing optical system that generates a laser spot having a predetermined power density by condensing the laser beam L output from the laser oscillator; A laser irradiation head 8 including a spot scanning system that scans the roll surface of the anilox roll 2 in which a large number of cells are arranged with a laser spot and sequentially heats the irradiation portion, and control for controlling driving of the laser irradiation head 8 A unit (control unit) 9 is schematically configured. The laser oscillator may be the same as or different from the first embodiment in the amplification medium, excitation mode, wavelength, oscillation condition, and the like. The condensing optical system and the spot scanning system may have the same configuration as that of the first embodiment, or may have a different configuration.

  The spot scanning system is composed of a galvano scanner for reciprocating scanning of a laser by shaking a mirror at a predetermined frequency and a predetermined angle range. In the apparatus of this embodiment, the mirror has a maximum touch angle and its vicinity ( When reaching the non-linear section), as shown in FIG. 8, mask members 31, 31 for blocking the irradiation of the laser spot LS on the roll surface of the anilox roll 2 are provided. The mask members 31 and 31 of this embodiment are provided in a pair on the left and right in the figure, and the separation interval can be adjusted according to the scanning width.

  Such mask members 31 and 31 are preferably disposed at a position close to the roll surface (laser spot irradiation portion) as much as possible at the time of cleaning, and specifically, a contact accident with the roll surface. From the viewpoint of prevention, it is preferable to be disposed at a position separated from the roll surface by 1 mm or more and 10 mm or less.

  The mask members 31 and 31 are preferably made of a material that is not easily damaged by a laser spot. For example, the mask members 31 and 31 are formed by applying a ceramic coating or chrome plating of the same quality as a base material for forming cells on a substrate such as stainless steel. You may do it. Note that the mask members 31 and 31 may be constituted of bare substrates such as stainless steel, for example, if they are considered to be consumables and can be replaced.

Next, with reference to FIG. 9, an overheating phenomenon at both ends of irradiation by reciprocating scanning of a laser spot using a galvano scanner will be described.
In the galvano scanner, the angular velocity of the mirror is linear (constant) ((b) in the figure), but the closer to the mirror folding point ((a) in the figure), the angular velocity becomes nonlinearly slower and the maximum touch angle (in the figure). In (a)), the angular velocity is 0 ((b) in the figure). Therefore, in this specification, the irradiation area of the roll surface that is irradiated in a section where the angular velocity of the mirror is constant is referred to as a linear irradiation region, and the mirror is positioned at the turnaround point and in the vicinity thereof, and the angular velocity of the mirror is nonlinearly slow. The irradiation area of the roll surface irradiated in a certain section is called a non-linear irradiation area.

  In this type of laser heating, even if the laser spot power density is constant at each irradiation site, the longer the irradiation time, the more energy is absorbed in the irradiation site, and the surface temperature of the irradiation site causes thermal damage to the base metal. The more you give it, the more you rise. As a result, if no countermeasures are taken, the angular velocity rapidly slows down, resulting in a problem that the base material is thermally damaged at both ends (non-linear irradiation region) of the belt-shaped irradiation part where the irradiation time becomes long. To do.

  Therefore, in this embodiment, the mask members 31 are arranged in the non-linear irradiation region, so that the spot scanning system mirror is turned around (maximum touch angle) and its vicinity as shown in FIG. When positioned at, the laser spot irradiation to the roll surface is blocked.

  As described above, according to this embodiment, irradiation to both end portions (regions that will be irradiated nonlinearly) of the belt-shaped irradiation portion is prevented, and only the linear irradiation region is scanned and cleaned. There is no thermal damage to the material and no cleaning irregularities occur, so that a high-quality recycled roll can be obtained.

Embodiment 6

FIG. 10 is an electrical block diagram schematically showing the electrical configuration of the masking means applied to the anilox roll cleaning apparatus according to the sixth embodiment of the present invention, and FIG. 11 is a diagram for explaining the operation of the embodiment. It is a time chart provided.
The sixth embodiment is greatly different from the fifth embodiment. In the fifth embodiment, the laser spot irradiation is performed in a section where the deflection angle of the mirror changes nonlinearly (nonlinear change section). The mask members 31 and 31 (hard masking) are used as the masking means for preventing the laser beam, but in this embodiment, ON / OFF control (soft masking) of the laser beam is performed. . The anilox roll cleaning apparatus of this embodiment can be applied to any of the usage examples of the first to fourth embodiments (FIGS. 1 and 4 to 7), as described in the third embodiment.

  As shown in FIG. 10, the soft masking means of this embodiment includes a scan control circuit 32 that controls driving of the mirrors constituting the galvano scanner, and a return signal generation circuit 33 that generates a return signal synchronized with the mirror folding operation. A TTL configuration masking circuit 34 that generates a masking signal (laser output stop signal) based on the input return signal, and an output control circuit 35 that controls ON / OFF of the laser output based on the input masking signal. It is roughly composed of

The masking circuit 34 generates a masking signal at the timing when the return signal is received from the return signal generation circuit 33 (FIG. 11C). The output control circuit 35 performs control to turn off the laser output during a period in which the masking signal is received from the masking circuit 34 (FIG. 11D).
During the laser output OF / OFF period, the roll surface of the anilox roll is not exposed to spot irradiation, so that the base material is free from thermal damage.

  As described above, even in this embodiment, irradiation to both ends of the belt-shaped irradiation region (region that will be irradiated nonlinearly) is prevented, and only the linear irradiation region is scanned and cleaned. And no uneven cleaning occurs, so that a high-quality regenerated roll can be obtained.

Note that the soft masking means by laser beam ON / OFF control is not limited to the circuit configuration of FIG. 10 and may be implemented using other circuit configurations, or the software configuration instead of the hardware configuration. You may implement with.
Further, in this embodiment, the output control circuit 35 is configured to perform control to turn off the laser output during a period in which the masking signal is received from the masking circuit 34, but the range in which the base material is not thermally damaged. Thus, a configuration (output reduction control) that weakens the output of the laser may be used. The masking width can be determined in advance by experiments or the like. However, if a masking width adjustment circuit is added, the operator can appropriately input a setting change.

Embodiment 7

FIG. 12 is a perspective view showing the configuration of an anilox roll cleaning apparatus according to a seventh embodiment of the present invention, FIG. 13 is a perspective view showing an enlarged main part of the embodiment, and FIG. It is an electrical block diagram which shows the electrical structure of embodiment schematically.
This embodiment differs greatly from the fourth embodiment shown in FIG. 7 in that the roll surface is disposed on the wheel portion 22 at the bottom of the cleaning device main body 19 and is in contact with the rotating roll surface when driven to rotate. When the cylindrical (or columnar) roller 13b is separated from the roll surface, or when the rotation of the anilox roll is stopped or decelerated, an output emergency stop means is provided to emergency stop the output of the laser beam. This is the point. 12 and 13, the same or corresponding parts as those in FIG. 7 are denoted by the same reference numerals, and the description thereof is omitted or simplified.

  The output emergency stop means monitors or measures the driven rotation of the roller 13b during the cleaning operation of the roll surface, so that the roller 13b is separated from the roll surface 2S or the rotation of the anilox roll 2 is stopped or It has an emergency detection means for detecting the deceleration. As shown in FIGS. 12 and 13, the emergency detection means includes at least a relay roller 36, an encoder roller 37, and a rotary encoder 38, and a mechanical part thereof is configured. The mechanical components of the rotary encoder 38 (relay roller 36, encoder roller 37, rotary encoder 38, etc.) are pivotally supported by the lower frame 27.

In this embodiment, any one of the four cylindrical (or columnar) rollers 13b that are driven to rotate in contact with the rotating roll surface 2S of the anilox roll 2 (for example, in front of FIG. 13). The right wheel) is used as the relay roller 36.
The relay roller 36 has a role of a transmission wheel that transmits the rotation of the roll surface 2 S of the anilox roll 2 to the encoder roller 37.
The encoder roller 37 is arranged in such a manner that the circumferential surface thereof is in contact with the circumferential surface of the relay roller 36, and is rotated in accordance with the rotation of the relay roller 36, thereby rotating the roll surface 2 S of the anilox roll 2. The displacement is transmitted to the rotary encoder 38. The material of the circumferential surface of the encoder roller 37 and the relay roller 36 is preferably, for example, hard urethane rubber, but is not limited thereto.
The rotary encoder 38 is coupled to the shaft (input shaft) of the encoder roller 37 using a coupling, converts the rotational displacement of the shaft of the encoder roller 37 into a digital electric signal, and detects the speed of the anilox roll 2. It has become.

  In the above configuration, when the roll surface 2S is rotating normally during the cleaning operation of the roll surface 2S of the anilox roll 2, the rotary encoder 38 is connected to the normal speed of the roll surface 2S via the relay roller 36 and the encoder roller 37. On the other hand, when the roll surface 2S stops rotating, or decelerates or accelerates, the roll surface 2S stops rotating, decelerates or accelerates (abnormal speed) via the relay roller 36 and the encoder roller 37. ) And a digital electric signal corresponding to the detected value is output. Even when the roll surface 2S is rotating normally, if for some reason an unexpected situation occurs in which the relay roller 36 (roller 13b) separates from the roll surface 2S of the anilox roll 2, the rotation of the relay roller 36 is Since it stops or decelerates, the rotary encoder 38 detects the rotation stop or deceleration (abnormal speed) of the input shaft and outputs a digital electric signal corresponding to the abnormality detection value.

Next, the electrical configuration of the output emergency stop means will be described with reference to FIG.
The output emergency stop means of this embodiment includes a rotary encoder output circuit 39 that outputs a speed detection value detected by the rotary encoder 38 and a speed detection value input from the rotary encoder output circuit 39, as shown in FIG. Based on this, it is determined whether or not an abnormal situation has occurred in the cleaning operation. When an abnormal situation occurs, an abnormality determination circuit 40 that generates an abnormality occurrence signal and when an abnormality occurrence signal is received from the abnormality determination circuit 40 And an output emergency stop circuit 41 for emergency stop of the laser output.

Next, the operation of this embodiment will be described.
12 to 14, when the roll surface 2S is rotating normally during the cleaning operation of the roll surface 2S of the anilox roll 2 and the relay roller 36 is in contact with the roll surface 2S, the rotary encoder 38 is The normal speed of the roll surface 2S is detected via the relay roller 36 and the encoder roller 37, and a digital electrical signal corresponding to the detected speed value is output from the rotary encoder output circuit 39. The abnormality determination circuit 40 compares the input speed detection value with a preset speed reference value. If the input speed detection value exceeds the speed reference value, the abnormality determination circuit 40 determines normal rotation and normal contact. And does not generate an abnormality occurrence signal. In this case, the abnormality occurrence signal is not generated because the normal rotation and the normal contact are made. Therefore, the laser output is maintained in the ON state.

  Next, when the rotation of the anilox roll 2 is stopped for some reason, the rotary encoder 38 detects the speed stop of the roll surface 2S via the relay roller 36 and the encoder roller 37, and from the rotary encoder output circuit 39, A digital electric signal corresponding to the detected speed value is output. The abnormality determination circuit 40 compares the input speed detection value with the speed reference value, and in this case (abnormal stop situation), the input speed detection value falls below the speed reference value, and thus generates an abnormality occurrence signal. To do. When receiving an abnormality occurrence signal from the abnormality determination circuit 40, the output emergency stop circuit 41 makes an emergency stop of the laser output. The reason for the emergency stop of the laser output is that if the laser spot irradiation is performed with the roll surface 2S stopped, the local area on the roll surface 2S is concentrated and heated for a long time. This is because melting proceeds and the anilox roll 2 is damaged.

  Next, when the rotation of the anilox roll 2 is decelerated for some reason, the rotary encoder 38 detects the deceleration of the roll surface 2S via the relay roller 36 and the encoder roller 37, and from the rotary encoder output circuit 39, A digital electrical signal corresponding to the speed detection value is output. The abnormality determination circuit 40 compares the input speed detection value with the speed reference value, and in this case (abnormal stop situation), if the input speed detection value falls below the speed reference value, an abnormality occurrence signal is generated. To do. When receiving an abnormality occurrence signal from the abnormality determination circuit 40, the output emergency stop circuit 41 makes an emergency stop of the laser output. The reason for the emergency stop of the laser output is the same as described above in the case where the rotation of the anilox roll 2 is stopped.

  Next, during the cleaning operation of the roll surface 2S of the anilox roll 2, when the relay roller 36 is separated from the roll surface 2S (abnormal separation) even though the roll surface 2S is rotating normally, the relay roller 36 Since the rotation decelerates and stops, the rotary encoder 38 cannot detect the normal speed of the roll surface 2S, detects the deceleration / stop of the relay roller 36, and responds to the abnormality detection value from the rotary encoder output circuit 39. A digital electrical signal is output. The abnormality determination circuit 40 compares the input speed detection value with the speed reference value, and in this case (abnormal situation), since the input speed detection value is lower than the speed reference value, an abnormality occurrence signal is generated. When receiving an abnormality occurrence signal from the abnormality determination circuit 40, the output emergency stop circuit 41 makes an emergency stop of the laser output. The reason for the emergency stop of the laser output is that if the defocusing irradiation is continued in a state where the light receiving surface is displaced from the image forming surface of the condensing lens in the optical axis direction, the cleaning quality is significantly deteriorated.

  According to this embodiment, an unexpected situation that may damage the base material can be avoided. In addition, it is possible to obtain a high-quality reproduction roll that does not cause uneven cleaning.

In the above embodiment, the case where the rotation of the anilox roll 2 is stopped or decelerated has been described. However, the laser output may be stopped or weakened even when the rotation of the anilox roll 2 is increased. In addition, in the above-described embodiment, the output emergency stop circuit 41 is configured to emergency stop the laser output when an abnormality occurs. However, the configuration is configured to weaken the laser output within a range in which the base material is not thermally damaged (output reduction). Control).
Further, the output emergency stop means is not limited to the circuit configuration shown in FIG. 14, but may be realized by using another circuit configuration, or may be realized by a software configuration instead of the hardware configuration.
For example, the rotary encoder is not limited to a contact type using a coupling, but may be a non-contact type using an electromagnetic coupling method, for example. Further, the encoder roller 37 may be directly brought into contact with the roll surface 2S of the anilox roll 2 without using the relay roller 36.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention. For example, in the above-described embodiment, the YAG laser is used as the high energy density heat source. However, the present invention is not limited thereto. For example, a gas laser such as a CO2 laser, an excimer laser such as an ArF laser or a KrF laser, a solid-state laser such as YVO4, A fiber laser using a fiber may be used as the amplification medium. In the above-described embodiment, the galvano scanner is used. However, the present invention is not limited to this. For example, a reciprocating motor scanner may be used.

  Further, although the direction-fixed type wheel is used as the sliding / moving means of the laser irradiation head 8, a direction-directional type wheel or a free ball (ball caster) may be used instead. For example, if a free ball is used, the anilox roll can be shifted and moved on the roll surface of the anilox roll not only in the circumferential direction or in the longitudinal direction, but also in the circumferential direction and the longitudinal direction. Can be done. Further, the wheels and the free balls are not limited to four wheels (four balls), and two wheels, three wheels, or a single wheel may be used if simplicity is desired. Moreover, as shown in FIG. 8, if a cylindrical (or columnar) roller 13b is used as the wheel, the landing on the roll surface can be further stabilized. In the above-described embodiment, the left and right mask members are provided as a pair. However, the present invention is not limited to this.

  Also, the emergency detection means is not limited to the rotary encoder configuration shown in FIGS. For example, an optical sensor, a pressure sensor, or the like can be used.

Also, a movement detecting means for detecting the moving speed of the laser irradiation head or the degree of the moving speed is provided so that the operator can hold the laser irradiation head by hand or move it on the guide rail in the axial direction of the anilox roll. When performing the cleaning operation, if the drive of the laser irradiation head is controlled based on the detection result of the movement detection means, a more uniform and high-quality cleaning can be realized. This movement detection means can be configured using, for example, a rotary encoder as described above.
Here, when the movement detecting means detects that the moving speed is fast, the laser output is increased, or the scanning frequency is increased, and when the moving speed is detected to be slow, the laser output is decreased, or Control to lower the scanning frequency.

  The present invention is not limited to an anilox roll used in flexographic printing, and can be applied to washing as long as the anilox roll is used as an ink metering means in, for example, relief printing other than flexographic printing, offset printing, and gravure printing. .

2 Anilox roll 21 Ceramic coating 22 Cell 23 Cleaning site R Residue of ink and varnish 7 Condensing lens 8, 25 Laser irradiation head L Laser beam 9 Control unit (control unit)
11, 11a Handle 12, 12a Leg 13, 13a, 13b Wheel (sliding / moving means)
14, 18 Guide rail 30 Height adjustment function 31 Mask member (masking means)
33 Return signal generation circuit (masking means)
34 Masking circuit (masking means)
35 Output control circuit (masking means)
37 Encoder roller (emergency detection means)
40 Abnormal situation judgment circuit (output emergency stop means)
41 Output emergency stop circuit (output emergency stop means)

In order to solve the above-described problems, a first aspect of the present invention is directed to a light source unit that outputs a laser beam under a predetermined output condition, and a laser having a high power density by condensing the laser beam output from the light source unit. evaporation or sublimation and condensing optical system for generating a spot, an ink residue to the roll surface with radiation of reciprocal scanning by the laser spot is attached to the roll surface of the anilox roll that large numbers of cells are arranged a laser irradiation head consisting of a spot scanning system which emits removed by relates to a control unit for controlling the driving of the laser irradiation head Bei Ete becomes a two Rocks roll cleaning device, the spot scanning system, the reciprocating scanning When operating at the turn-around point and the vicinity thereof, the irradiation of the laser spot on the roll surface of the anilox roll is cut off, stopped, or weakened. Masking means is characterized in that provided that.
The anilox roll in this invention is a concept that refers to all ink metering rollers whose roll surfaces are covered with cells, regardless of their names.

The invention of claim 2 wherein relates to the anilox roll cleaning apparatus according to claim 1, wherein the spot scanning system, at a predetermined frequency, the predetermined angular range, the round-trip scanning the laser spot waving mirror together consist galvanometer scanner for causing, when the mirror has reached the maximum deflection angle and the vicinity thereof, block the irradiation of the laser spot on the roll surface of the anilox roll, or provided with a stop or weaken the masking means It is characterized by having.

According to a third aspect of the invention relates to the anilox roll cleaning apparatus according to claim 1 or 2, wherein said masking means, together with an electrically signal system, said spot scanning system of claim 1, said reciprocating scanning A masking signal is generated to stop the output of the laser beam when operating at a turn-around point and its vicinity, or when the mirror of the galvano scanner according to claim 2 is located at and near a maximum touch angle. Or it is characterized by decreasing.

The invention of claim 4 relates to the anilox roll cleaning apparatus according to claim 1 or 2, wherein, with said masking means comprises a susceptible mask member thermal damage by the laser spot, according to claim 1 wherein when the spot scanning system, which operates at the turning point and the vicinity thereof of said reciprocal scanning, or, when located at the maximum deflection angle and near the mirror of the galvano scanner according to claim 2, wherein the mask member Is characterized by blocking irradiation of the laser spot on the roll surface of the anilox roll .

The invention described in claim 5 relates to the anilox roll cleaning apparatus according to any one of claims 1 to 4 , wherein an operator holds the laser irradiation head by hand to perform a cleaning operation. It is characterized by having a handle.

According to a sixth aspect of the present invention, a light source unit that outputs a laser beam under a predetermined output condition, and a condensing unit that condenses the laser beam output from the light source unit to generate a laser spot with a high power density. An optical system and a spot scanning system that emits and removes ink residues adhering to the roll surface by irradiating while scanning the roll surface of an anilox roll in which a large number of cells are arranged with the laser spot. An anilox roll cleaning apparatus comprising a laser irradiation head comprising: a control unit that controls driving of the laser irradiation head, and guiding the laser irradiation head along a length direction of a roll surface of the anilox roll It is characterized in that a guide rail for movement is provided .

According to an eighth aspect of the present invention, a light source unit that outputs a laser beam under a predetermined output condition, and a condensing unit that condenses the laser beam output from the light source unit to generate a laser spot with a high power density. An optical system and a spot scanning system that emits and removes ink residues adhering to the roll surface by irradiating while scanning the roll surface of an anilox roll in which a large number of cells are arranged with the laser spot. And an anilox roll cleaning apparatus comprising a control unit that controls driving of the laser irradiation head. The laser irradiation head is brought into contact with a roll surface of the anilox roll and laser irradiation is performed. further comprising one or more rotating bodies supporting the head body, the spot scanning system, pre-rotation Symbol rotating body of the anilox roll With a state of the driven rotating, and the roll surface for rotation of the anilox roll is characterized by being configured to aspects of irradiating while scanning with the laser spot.

Further, when the invention of claim 9 relates to the anilox roll cleaning apparatus according to claim 8, wherein the anilox roll wash Kiyoshiji, the rotating body is spaced from the roll surface of the anilox roll, or the anilox when the rotation of the roll is stopped or sharply speed is characterized in that the output emergency stop means for emergency stop output of the laser beam is provided.

Further, an invention according claim 10 relates to the anilox roll cleaning device according to claim 9, wherein the anilox roll wash Kiyoshiji, the rotating body that, apart from the roll surface, or the rotation of the anilox roll There has been characterized in that the emergency detection means for detecting that it has stopped or sharply speed is provided.

An eleventh aspect of the present invention relates to the anilox roll cleaning apparatus according to any one of the first to tenth aspects , wherein the laser irradiation head is moved at a speed or a degree of movement speed when the anilox roll is cleaned. co becomes comprise movement detection means for detecting, based on the detection result of said movement detecting means is characterized by controlling the driving of the laser irradiation head.

The invention according to claim 12 relates to the anilox roll cleaning device according to claim 11 , and when the movement detecting means detects that the moving speed is high, the laser output is increased or the scanning frequency is increased. When it is detected that the moving speed is slow, control is performed to lower the laser output or lower the scanning frequency.

Claims (13)

A light source unit that outputs a laser beam under a predetermined output condition, a condensing optical system that condenses the laser beam output from the light source unit to generate a laser spot with a predetermined power density, and a number of objects to be cleaned A laser irradiation head comprising a spot scanning system that scans a roll surface of an anilox roll in which cells are arranged with the laser spot and sequentially heats an irradiation portion;
A control unit for controlling driving of the laser irradiation head,
An anilox roll cleaning device configured to clean the roll surface while the anilox roll is still attached to a printing press,
At the time of cleaning the roll surface, the control unit performs heating to remove only the ink residue by melting, evaporating, or sublimating the base material forming the cell without causing thermal damage to the irradiation portion of the laser spot. An anilox roll cleaning apparatus characterized in that the laser irradiation head is controlled under conditions.   When the spot scanning system operates at a turnaround point of reciprocating scanning and in the vicinity thereof, a masking unit is provided that blocks, stops, or weakens the irradiation of the laser spot on the roll surface. Item 3. An anilox roll cleaning apparatus according to item 1. The spot scanning system includes a galvano scanner for reciprocating the laser by shaking a mirror at a predetermined frequency and a predetermined angle range.
3. An anilox according to claim 2, further comprising a masking means for interrupting or stopping or weakening the irradiation of the laser spot on the roll surface when the mirror reaches the maximum touch angle and the vicinity thereof. Roll cleaning device.   The masking means is composed of an electric signal system, and when the spot scanning system operates at and near the turning point of reciprocating scanning, or when the mirror is positioned at and near the maximum touch angle, a masking signal is output. The anilox roll cleaning apparatus according to claim 2 or 3, wherein the anilox roll cleaning device generates and stops or reduces the output of the laser beam.   The masking means is made of a mask member that is not easily damaged by a laser spot, and the spot scanning system operates at a turnaround point of the reciprocating scan and its vicinity, or when the mirror is at a maximum touch angle and its vicinity. 4. The anilox roll cleaning apparatus according to claim 2, wherein the mask member blocks irradiation of the laser spot to the roll surface when positioned at the position.   The anilox roll cleaning apparatus according to any one of claims 1 to 5, further comprising a guide rail that guides and moves the laser irradiation head along a length direction of the roll surface.   7. The anilox roll cleaning apparatus according to claim 6, wherein the guide rail includes an elevated rail mechanism having a height adjustment function independently at both ends.   The anilox roll cleaning apparatus according to any one of claims 1 to 5, wherein the laser irradiation head includes a handle for an operator to perform a cleaning operation by hand. When abutted against the roll surface, comprising one or a plurality of rotating bodies that rotate following rotation of the anilox roll,
The laser irradiation head is configured to generate and scan a laser spot on an irradiation portion of the roll surface in a state in which the rotating body is in contact with the anilox roll and driven to rotate during the cleaning of the roll surface. An anilox roll cleaning apparatus according to any one of claims 1 to 8, wherein   When the roll surface is washed, when the rotating body is separated from the roll surface, or when the rotation of the anilox roll is stopped or suddenly reduced, an output emergency stop means is provided to emergency stop the output of the laser beam. The anilox roll cleaning apparatus according to claim 9.   By monitoring or measuring the rotation of the rotating body, when the roll surface is cleaned, it is detected that the rotating body has moved away from the roll surface, or that the rotation of the anilox roll has stopped or suddenly decreased. The anilox roll cleaning apparatus according to claim 10, further comprising a detection unit.   A movement monitoring means for detecting the movement speed of the laser irradiation head or the degree of movement speed is provided, and the operator holds the laser irradiation head by hand or on the guide rail on the roll surface. 12. The driving of the laser irradiation head is controlled based on a detection result of the movement monitoring unit when the cleaning operation is performed by moving the head in the longitudinal direction. Anilox roll cleaning device as described in 1.   When the movement monitoring means detects that the moving speed is high, the laser output is increased or the scanning frequency is increased. When the moving speed is detected to be slow, the laser output is decreased or the scanning frequency is increased. The anilox roll cleaning apparatus according to claim 12, wherein lowering control is performed.

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