Transfer roll cleaning method and transfer roll cleaning apparatus

Abstract

To clean a transfer roll by removing an adhesive on the outer periphery of the transfer roll.SOLUTION: In the cleaning method of the transfer roll, laser irradiation is performed on the adhesive solidified on the outer periphery of the transfer roll with an irradiation energy amount that sublimates the adhesive and maintains the plating film on the outer periphery.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a transfer roll cleaning method and a transfer roll cleaning device. [Background technology]

[0002] US Pat. No. 5,699,949 describes a laser cleaning system for anilox rolls and cylindrical surfaces. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] European Patent No. 2390039 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology described in Patent Document 1 targets removal of ink, adhesive, varnish, etc. that have accumulated on the cylindrical surface.

[0005] However, for example, in the case of a transfer roll that transfers an adhesive, depending on the type of adhesive, the reaction speed is fast and the adhesive may adhere firmly to the outer periphery of the transfer roll. For example, in the technology described in Patent Document 1, if the laser irradiation energy is increased, it may be possible to remove the adhesive that has adhered to the surface of the transfer roll. However, simply increasing the laser irradiation energy may damage the outer periphery of the transfer roll.

[0006] The present disclosure provides a transfer roll cleaning method and transfer roll cleaning device that can remove adhesive from the outer periphery and clean the transfer roll while suppressing damage caused by laser irradiation to the outer periphery of the transfer roll. [Means for solving the problem]

[0007] The present disclosure includes the following aspects. <1> A method for cleaning a transfer roll, comprising irradiating a laser beam on an adhesive solidified on the outer periphery of a transfer roll with an irradiation energy amount sufficient to sublimate the adhesive and maintain the plating film on the outer periphery. <2> The transfer roll is rotated in the circumferential direction and stopped intermittently, and the laser irradiation is performed while the rotation is stopped. <1> 2. The method for cleaning a transfer roll according to claim 1. <3> an irradiation depth of the laser irradiation range on the outer periphery of the transfer roll perpendicular to the axial direction of the transfer roll is narrower than a roll diameter of the transfer roll; <2> 2. The method for cleaning a transfer roll according to claim 1. <4> The laser irradiation is performed by rotating the transfer roll so that the irradiation ranges of the laser irradiation overlap in the circumferential direction of the transfer roll on the outer periphery of the transfer roll. <3> 2. The method for cleaning a transfer roll according to claim 1. <5> The irradiation device is moved intermittently in the axial direction of the transfer roll, and laser irradiation is performed from the irradiation device while the movement is stopped. <1> ~ <4> 2. The method for cleaning a transfer roll according to claim 1, <6> The laser irradiation is performed using a gravure roll as the transfer roll. <1> ~ <5> 10. The method for cleaning a transfer roll according to claim 9. <7> a support device for supporting the transfer roll; an irradiation device that irradiates a laser beam with an amount of irradiation energy that sublimates the adhesive solidified on the outer periphery of the transfer roll supported by the support device while maintaining the plating film on the outer periphery; A transfer roll cleaning device having the same. <8> The support device includes a rotation device that rotates the transfer roll intermittently in the circumferential direction. <7> 2. A cleaning device for a transfer roll according to claim 1. <9> The irradiation device is an irradiation head that performs the laser irradiation; a moving device that intermittently moves the irradiation head in the axial direction of the transfer roll supported by the supporting device; Equipped with <7> or <8> 2. A cleaning device for a transfer roll according to claim 1. [Effects of the Invention]

[0008] According to the present disclosure, it is possible to remove adhesive from the outer periphery and clean the transfer roll while suppressing damage to the outer periphery of the transfer roll caused by laser irradiation. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a schematic configuration of a transfer roll cleaning device according to an embodiment. [Figure 2] FIG. 2 is a side view partially showing the transfer roll cleaning device of the embodiment. [Figure 3] FIG. 3 is a perspective view partially showing the transfer roll cleaning device of the embodiment. [Figure 4] FIG. 4 is a front view partially showing the transfer roll cleaning device of the embodiment. [Figure 5] FIG. 5 is a cross-sectional view showing a part of the surface of the transfer roll in an enlarged scale. [Figure 6] FIG. 6 is a partially enlarged cross-sectional view showing the surface of the transfer roll with adhesive attached thereto. [Figure 7] FIG. 7 is a side view showing a state in which the outer periphery of a transfer roll is irradiated with a laser by the transfer roll cleaning device of the embodiment. [Figure 8] FIG. 8 is a side view showing a state in which the outer periphery of the transfer roll is irradiated with a laser by the transfer roll cleaning device of the embodiment. [Figure 9] FIG. 9 is a side view showing a state in which the outer periphery of the transfer roll is irradiated with a laser by the transfer roll cleaning device of the embodiment. [Figure 10] FIG. 10 is a front view showing a state in which the outer periphery of the transfer roll is irradiated with a laser by the transfer roll cleaning device of the embodiment. [Figure 11] FIG. 11 is a front view showing a state in which the outer periphery of the transfer roll is irradiated with a laser by the transfer roll cleaning device of the embodiment. [Figure 12] FIG. 12 is a block diagram showing a control device in the transfer roll cleaning device of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described. However, the present disclosure is not limited to the following embodiments. When embodiments are described with reference to drawings in the present disclosure, the configuration of the embodiment is not limited to the configuration shown in the drawings. Furthermore, the sizes of components in each drawing are conceptual, and the relative size relationships between components are not limited to these.

[0011] In the following description of the drawings, like parts are denoted by like reference numerals. However, the drawings are schematic, and the ratios of the dimensions may differ from those of the actual parts. Therefore, the specific dimensions should be determined by taking into consideration the following explanation. Furthermore, the drawings also include parts in which the dimensional relationships and ratios differ from one another. Furthermore, unless otherwise specified in the specification, the number of each component element of the present disclosure is not limited to one, and multiple components may be present.

[0012] In the following embodiments, components (including element steps, etc.) are not essential unless otherwise specified. The same applies to numerical values ​​and their ranges, and do not limit the present disclosure.

[0013] In the present disclosure, numerical ranges indicated using "to" include the numerical values ​​before and after "to" as the minimum and maximum values, respectively.

[0014] In the numerical ranges described in stages in this disclosure, the upper or lower limit value described in one numerical range may be replaced with the upper or lower limit value of another numerical range described in stages. Furthermore, in the numerical ranges described in this disclosure, the upper or lower limit value of that numerical range may be replaced with a value shown in the examples.

[0015] In the present disclosure, when components are contained, each component may contain multiple types of corresponding substances. When multiple types of substances corresponding to each component are present in the composition, the content or amount of each component means the total content or amount of the multiple types of substances present in the composition, unless otherwise specified.

[0016] In the present disclosure, the terms "layer" and "film" include cases where the layer or film is formed over the entire area when the area in which the layer or film is present is observed, as well as cases where the layer or film is formed over only a portion of the area.

[0017] The overall configuration of a transfer roll cleaning device 12 (hereinafter simply referred to as "cleaning device 12") of this embodiment will be described with reference to FIG.

[0018] The cleaning device 12 is a device that cleans the outer periphery of the transfer roll 14, which is also shown in Figures 2 to 4. The transfer roll 14 of this embodiment is a roll that has an adhesive GL (see Figure 6) attached to its outer periphery and is used to transfer this adhesive GL to a target member. As an example of the transfer roll 14, a gravure roll is used.

[0019] The transfer roll 14 has a shaft 16 and a roll body 18. The shaft 16 protrudes from both axial ends of the roll body 18. The shaft 16 has a smaller diameter than the roll body 18. As shown in FIGS. 5 and 6, minute irregularities are formed on the outer periphery of the roll body 18. The presence of such irregularities makes it easier for the adhesive GL to be held in place compared to a configuration without irregularities. A plating film 20 is formed on the surface of these irregularities. The plating that constitutes the plating film 20 is, for example, hard chrome plating.

[0020] In FIG. 1, the width direction, depth direction, and up-down direction of the cleaning device 12 are indicated by arrows W, D, and H, respectively.

[0021] 1, the cleaning device 12 has a support device 22. The support device 22 has a flat support base 24. A pair of bearings 26 are arranged on the support base 24. The bearings 26 rotatably support the shaft 16 of the transfer roll 14. When supported by the bearings 26, the axial direction (longitudinal direction) of the transfer roll 14 coincides with the width direction of the cleaning device 12.

[0022] Each of the bearings 26 is supported on a rail 28 extending in the width direction. The bearings 26 are movable in the width direction along the rail 28. Stoppers 30 that limit the movement of the bearings 26 are provided on both longitudinal ends of the rail 28.

[0023] A roll rotation motor 32 is disposed on the support base 24. The roll rotation motor 32 rotates the transfer roll 14, which is supported by a bearing 26, in the direction of arrow R1. In this embodiment, the roll rotation motor 32 is capable of intermittently rotating the transfer roll 14 by a predetermined angle in the circumferential direction and stopping the rotation. The roll rotation motor 32 is an example of a rotation device according to the disclosed technology. The roll rotation motor 32 is controlled by a control device 46.

[0024] The cleaning apparatus 12 includes an irradiation device 34. The irradiation device 34 includes an irradiation head 36, an irradiation unit 38, and a moving device 40. A guide bar 42 is supported above the support device 22 by a support member (not shown). The longitudinal direction of the guide bar 42 coincides with the width direction of the cleaning apparatus 12. The guide bar 42 is inserted into the case of the moving device 40. As indicated by arrow M1, the moving device 40 moves the irradiation head 36 and the irradiation unit 38 along the guide bar 42, i.e., in the width direction of the cleaning apparatus 12. In this embodiment, the moving device 40 can intermittently move and stop the irradiation head 36 and the irradiation unit 38 in the direction of arrow M1. The irradiation device 34 is controlled by a control device 46.

[0025] As shown in FIGS. 2 to 4, the irradiation unit 38 generates a laser beam LZ having a predetermined wavelength and intensity. The irradiation head 36 irradiates the laser beam LZ toward the outer periphery of the transfer roll 14. As shown in FIG. 4, in this embodiment, the width (irradiation width W1) of the irradiation area LE of the laser beam LZ is shorter than the length L1 of the roll body 18 of the transfer roll 14. Also, as shown in FIG. 2, the depth (irradiation depth D1) of the irradiation area LE of the laser beam LZ is shorter than the roll diameter (outer diameter D2) of the roll body 18 of the transfer roll 14. In this embodiment, as shown in FIGS. 2 and 3, the irradiation area LE on the outer periphery of the transfer roll 14 has a curved shape that follows the shape of the outer periphery. In this irradiation area LE, a laser beam LZ having a predetermined spot diameter is subjected to main scanning and sub-scanning. The laser beam LZ is irradiated in a direction such that the center line CL of the irradiation area LE is perpendicular to the center line CL2 of the transfer roll 14.

[0026] The amount of irradiation energy of the laser LZ from the irradiation device 34 is set to an amount that sublimes the adhesive fixed on the outer periphery of the roll body 18 but maintains the plating film 20. As will be described later, the laser LZ may be irradiated multiple times over the same area on the outer periphery of the roll body 18. In this case, the total amount of irradiation energy in the multiple laser irradiations is set to sublimate the adhesive but maintain the plating film 20. The irradiation device 34 is controlled by a control device 46.

[0027] FIG. 12 is a block diagram showing the hardware configuration of the control device 46 of the disclosed technique.

[0028] The control device 46 includes a computer 84. The computer 84 includes a processor 86, a memory 88, a storage 90, an input device 92, an output device 94, a storage medium reader 96, and a communication I / F (Interface) 98. These elements are connected to each other via a bus 100 so that they can communicate with each other.

[0029] The storage 90 stores a cleaning program 102 for controlling the cleaning device 12. The processor 86 is capable of executing various programs and controlling each element. Specifically, the processor 86 reads the program from the storage 90 and executes the program using the memory 88 as a work area. In other words, the processor 86 controls each element and performs various arithmetic processing in accordance with the program stored in the storage 90.

[0030] The memory 88 can temporarily store programs and various data as a work area.

[0031] The storage 90 is, for example, a read-only memory (ROM), a hard disk drive (HDD), a solid state drive (SSD), etc., and stores various programs and various data. These programs include not only application programs such as the cleaning program 102 described above, but also an operating system.

[0032] The input device 92 is a device for making various inputs to the computer 84. The input device 92 includes operation switches, operation buttons, etc., and may also include a keyboard used in a personal computer, a mouse, or other pointing device, etc.

[0033] The output device 94 is a device for outputting various types of information from the computer 84, and includes, for example, a display, an indicator lamp, a speaker, etc. A touch panel display can also be used as the output device 94, in which case the touch panel display also functions as the input device 92.

[0034] The storage medium reader 96 is a device that reads data stored in various storage media and writes data to the storage media, such as a CD (Compact Disc)-ROM, a DVD (Digital Versatile Disc)-ROM, a Blu-ray Disc, and a USB (Universal Serial Bus) memory.

[0035] The communication I / F 98 is an interface for communicating with other devices, and is compliant with standards such as Ethernet (registered trademark) and FDDI (Fiber Distributed Data Interface).

[0036] In this embodiment, the communication I / F 98 can control the roll rotation motor 32 and the irradiation device 34 and acquire various status information by communicating with these devices. This communication may be wireless or wired.

[0037] The cleaning device 12 is equipped with an operation panel 48. The operation panel 48 is connected to the control device 46. Various operating conditions of the cleaning device 12 are displayed on the operation panel 48. Furthermore, an operator can input operating instructions for the cleaning device 12 and various information about the transfer roll 14 through the operation panel 48. The operation panel 48 is, for example, a touch panel. Furthermore, a display panel such as a display that displays the operating conditions of the cleaning device 12 and an input member such as a keyboard that accepts various inputs may be separate members. The operation panel 48 shown in FIG. 1 can be configured as a member that combines the input device 92 and output device 94 shown in FIG. 12, for example.

[0038] Next, the operation of this embodiment and the method for cleaning the transfer roll will be described.

[0039] 6, when the adhesive GL is transferred to the target member by the transfer roll 14, the adhesive GL may solidify on the outer periphery of the roll body 18. The cleaning device 12 can remove the adhesive GL from the transfer roll 14 on which the adhesive GL has solidified, and clean the transfer roll 14.

[0040] Specifically, as shown in FIG. 1 , the transfer roll 14 is supported by a pair of bearings 26. Then, a laser beam LZ is irradiated from an irradiation device 34 onto the outer periphery of the roll body 18 of the transfer roll 14. The amount of irradiation energy of the laser beam LZ from the irradiation device 34 is set to a level that sublimes the adhesive GL adhered to the outer periphery of the roll body 18 while maintaining the plating film 20. Therefore, the adhesive GL adhered to the outer periphery of the roll body 18 can be sublimated and removed from the outer periphery of the roll body 18. Moreover, the plating film 20 formed on the outer periphery of the roll body 18 is not damaged by the irradiation of the laser beam LZ. Therefore, the transfer roll 14, from which the adhesive GL has been removed from the outer periphery of the roll body 18 and which has been cleaned, can be reused for applying the adhesive GL to a target member.

[0041] In this embodiment, the irradiation depth D1 of the irradiation range LE of the laser LZ is shorter than the roll diameter (outer diameter D2) of the roll body 18 of the transfer roll 14. The laser LZ is irradiated onto the outer periphery of the roll body in a direction such that the center line CL of the irradiation range LE is perpendicular to the center line CL2 of the transfer roll 14. As a result, as shown in FIGS. 2 and 3 , a structure is realized in which the laser LZ is irradiated onto the central portion 18C in the depth direction, rather than the rear portion 18B and front portion 18A of the roll body 18. In the rear portion 18B and front portion 18A of the roll body 18, the laser LZ is incident obliquely onto the roll body 18 at a large incident angle, so the amount of energy received per unit area is small. In contrast, in the central portion 18C of the roll body 18, the laser LZ is incident nearly perpendicular to the outer periphery of the roll body 18, i.e., at a small incident angle, so the amount of energy received per unit area is large. That is, in this embodiment, the laser LZ is irradiated in a range that receives a larger amount of energy per unit area from the irradiated laser LZ.

[0042] In this embodiment, the transfer roll 14 supported by the bearings 26 is rotated by a roll rotation motor 32. Even if the irradiation depth D1 of the laser LZ is smaller than the outer diameter D1 of the roll body 18 of the transfer roll 14, by rotating the transfer roll 14, the laser can be irradiated over the entire circumferential direction of the roll body 18.

[0043] In this embodiment, the roll rotation motor 32 intermittently rotates the transfer roll 14 by a predetermined angle in the circumferential direction and stops the rotation. Then, for example, with the transfer roll 14 stopped, the laser LZ is irradiated onto a predetermined area. When irradiation of the predetermined area with the laser LZ is completed, the adhesive GL has sublimated in the area irradiated with the laser LZ. Next, the roll rotation motor 32 rotates the transfer roll 14 by a rotation angle θ corresponding to the irradiation depth D1. Then, the irradiation device 34 irradiates the laser LZ onto the portion of the outer periphery of the roll body 18 that has not been irradiated with the laser LZ. By repeating this operation until the transfer roll 14 rotates once, the laser LZ can be irradiated onto the outer periphery of the roll body 18 over the entire circumferential direction.

[0044] The transfer roll 14 may be configured to rotate continuously instead of intermittently as described above. A configuration in which the transfer roll 14 is rotated intermittently can achieve a more accurate and stable cleaning effect than a configuration in which the transfer roll 14 is rotated continuously. On the other hand, a configuration in which the transfer roll 14 is operated continuously does not require the transfer roll 14 to be rotated and stopped as frequently as a configuration in which the transfer roll 14 is rotated intermittently, and therefore the load on the roll rotation motor 32 can be reduced.

[0045] The rotation angle θ2 when rotating the transfer roll 14 is the angle at which the portion irradiated with the laser LZ continues in the circumferential direction of the outer periphery of the roll body 18. For example, as shown in FIG. 7, if the central angle of the irradiation range LE of the laser LZ relative to the center line CL2 of the transfer roll 14 is θ1, the rotation angle θ2 of the transfer roll 14 may coincide with this central angle θ1. However, as shown in FIGS. 8 and 9, the rotation angle θ2 of the transfer roll 14 may be set smaller than the central angle θ1 of the irradiation range LE of the laser LZ. In this configuration, an overlapping portion of the irradiation range LE corresponding to the angle (θ1-θ2) occurs. Therefore, even if the actual rotation angle of the transfer roll 14 deviates slightly for some reason, the laser LZ can be irradiated without gaps in the circumferential direction on the outer periphery of the roll body 18 within this overlapping portion.

[0046] In particular, as shown in FIG. 8, the rotation angle θ2 of the transfer roll 14 may be set to approximately ½ of the central angle θ of the irradiation range LE of the laser LZ. Even in this case, by repeating this operation until the transfer roll 14 rotates once, the laser LZ can be irradiated onto the outer periphery of the roll body 18 all around in the circumferential direction. Moreover, the irradiation range LE of the laser LZ overlaps twice at each portion in the circumferential direction of the roll body 18. Therefore, even if the amount of energy irradiated per laser LZ is reduced to approximately ½, it is possible to sublimate the adhesive GL from the outer periphery of the roll body 18. Furthermore, the rotation angle θ2 of the transfer roll 14 may be set to 1 / n of the central angle θ1 of the irradiation range LE of the laser LZ, where n is any natural number.

[0047] In this embodiment, the irradiation width W1 of the laser irradiation range LE is shorter than the length L1 of the roll body 18 of the transfer roll 14. The irradiation device 34 is driven by the movement device 40 to move along the guide bar 42, i.e., along the width direction of the cleaning device 12. Even if the irradiation width W1 of the laser LZ irradiation range LE is shorter than the length L1 of the roll body 18 of the transfer roll 14, the movement of the irradiation device 34 makes it possible to irradiate the outer periphery of the roll body 18 with the laser LZ over the entire axial length thereof.

[0048] In this embodiment, the moving device 40 can intermittently move and stop the irradiation device 34 along the width direction of the cleaning device 12. For example, by stopping the irradiation device 34 in the width direction (arrow W direction) and rotating the transfer roll 14 in the circumferential direction as described above, the outer periphery of the roll body 18 is irradiated with the laser LZ within the irradiation width W1. Then, when irradiation of the entire circumference of the roll body 18 with the laser LZ is completed, the moving device 40 moves the irradiation device 34 in the M1 direction by the movement amount of the irradiation width W1. By repeating the above operation over the entire axial length of the roll body 18 (length in the arrow W direction), the entire axial length of the roll body 18 can be irradiated with the laser LZ.

[0049] When the irradiation device 34 is moved intermittently in the direction of arrow W, the amount of movement per movement is the continuous length of the portion irradiated with the laser LZ in the axial direction of the roll body 18. For example, the amount of movement of the irradiation device 34 may be equal to the irradiation width W1. However, if the amount of movement of the irradiation device 34 is set shorter than the irradiation width W1, the laser LZ can be irradiated without gaps in the axial direction on the outer periphery of the roll body 18 even if the amount of movement of the irradiation device 34 deviates slightly for some reason.

[0050] 10, the movement amount of the irradiation device 34 in the direction of the arrow W may be approximately 1 / 2 of the irradiation width W1. Even in this case, by intermittently moving the irradiation device 34 in the direction of the arrow W over the entire axial length of the transfer roll 14 to irradiate the laser LZ, the outer periphery of the roll body 18 can be irradiated with the laser LZ along the entire length of the roll body 18. Moreover, the irradiation range LE of the laser LZ overlaps twice at each portion of the axial length of the roll body 18. Therefore, even if the amount of energy irradiated per laser LZ is reduced to approximately 1 / 2, it is possible to sublimate the adhesive GL from the outer periphery of the roll body 18. Furthermore, the movement amount of the irradiation device 34 may be 1 / m of the irradiation width W1 of the laser LZ, where m is an arbitrary natural number.

[0051] In the disclosed technology, the amount of irradiation energy of the laser LZ irradiated onto the roll body 18 of the transfer roll 14 may be, as described above, an amount of energy that does not damage the plating film 20 formed on the outer periphery of the roll body 18 and that sublimates the adhesive GL. For example, the amount of energy per unit area may be 20 mJ / mm 2 200mJ / mm or more 2 It is preferable that the dose is 60 mJ / mm or less. 2 More than 120mJ / mm 2 It is more preferable that the irradiation energy of the laser LZ is 20 mJ / mm or less. 2 By setting the temperature at or above this level, it is possible to sublimate the adhesive GL, and the temperature is 60 mJ / mm 2 By setting the irradiation energy of the laser LZ at 200 mJ / mm or more, it is possible to sublimate the adhesive GL in a shorter time. 2 By setting the exposure dose to 120 mJ / mm or less, damage to the plating film 20 can be suppressed. 2 By setting the temperature to the following value, the effect of suppressing damage to the plating film 20 is enhanced.

[0052] The type of laser LZ is not limited, but for example, a carbon dioxide laser (CO2 laser) can be used. A carbon dioxide laser can output laser light with a wavelength of 10.6 μm. This laser light will not damage the plating film 20, for example, if the plating film 20 is made of chrome plating.

[0053] The beam diameter of the laser LZ is not particularly limited, but can be set to a diameter that allows the laser LZ to easily reach the inside of the recessed portion depending on the irregularities on the outer periphery of the roll body 18. For example, if one side of the recessed portion is 0.05 mm, the spot diameter of the laser LZ may be set to about 0.05 mm or 0.05 mm or less. From this perspective, there is no lower limit to the spot diameter of the laser LZ.

[0054] The method of irradiating the laser LZ in the irradiation device 34 is not limited.

[0055] The laser LZ may be of any type as long as it can remove the adhesive GL adhered to the outer periphery of the roll body 18 and does not damage the plating film 20. For example, in addition to the CO2 laser described above, a fiber laser can also be used.

[0056] In the disclosed technology, in order to remove the adhesive GL that has adhered to the outer periphery of the roll body 18, it is not necessary to apply a physical force to the outer periphery of the roll body 18 to peel off the adhesive GL. By not applying a physical force, the outer periphery of the roll body 18 is not damaged.

[0057] The disclosed technology does not require the use of chemical substances such as solvents and stripping agents that cause chemical changes to the outer periphery of the roll body 18 in order to remove the adhesive GL that has adhered to the outer periphery of the roll body 18. By not using chemical substances, there is no need for equipment or work to collect chemical substances after use, and the chemical substances do not affect the surrounding environment.

[0058] The disclosed technology does not require a member that applies a physical force to the outer periphery of the roll body 18 or a member that applies a cleaning agent in order to remove the adhesive GL that has adhered to the outer periphery of the roll body 18. Because these members are not required, the adhesive GL that has adhered to the outer periphery of the roll body 18 can be removed at low cost and with low power consumption. In addition, maintenance work for these members is also not required. By not using these members, the number of consumables is reduced, and the cost of maintaining the cleaning device 12 is also low.

[0059] The disclosed technology does not use peeling due to the action of physical force or chemical change to remove the adhesive GL that has adhered to the outer periphery of the roll body 18. The time required for peeling is not required, and the adhesive GL can be removed from the outer periphery of the roll body 18 in a short time. This allows for high productivity and low cost when recycling the transfer roll 14.

[0060] The disclosed technology can be applied to any adhesive that needs to be removed from the periphery of the roll body 18. In particular, depending on the type of adhesive GL, it may become firmly attached to the periphery of the roll body 18 in a short period of time. In such cases, even if attempts are made to remove the adhesive GL by applying physical force or using chemicals, removal may take a long time or may be insufficient. The disclosed technology sublimates the adhesive GL by irradiating it with a laser LZ, so the adhesive GL can be removed from the periphery of the roll body 18 more reliably and in a short period of time compared to applying physical force or using chemicals. Specific examples of the adhesive GL include polyolefin, polyurethane, polyester, polyether, and polyisocyanate.

[0061] In addition to the above-mentioned hard chromium plating, nickel plating and zinc plating can be used as plating for the plating film 20. These platings protect the outer periphery of the roll body 18 and are not damaged by the amount of irradiation energy of the laser LZ of the disclosed technology.

[0062] The transfer roll of the disclosed technology is not limited to the gravure roll described above, but can be any transfer roll in which an adhesive may adhere to the plating film on the outer periphery, such as an anilox roll. [Explanation of symbols]

[0063] 12 Cleaning equipment 14 Transfer roll (example of roll) 20 Plating film 22 Support device 24 Support stand 28 Rail 30 Stopper 32 Roll rotation motor (an example of a rotation device) 34 Irradiation device 36 irradiation head 38 Irradiation Unit 40 Mobile Device 42 Guide Bar 46 Control Device 48 Operation Panel GL Adhesive

Claims

1. A method for cleaning a transfer roll, comprising irradiating a laser beam on an adhesive solidified on the outer periphery of a transfer roll with an irradiation energy amount sufficient to sublimate the adhesive and maintain the plating film on the outer periphery.

2. 2. The method for cleaning a transfer roll according to claim 1, wherein the transfer roll is rotated in the circumferential direction and stopped intermittently, and the laser irradiation is performed while the rotation is stopped.

3. The transfer roll cleaning method according to claim 2 , wherein an irradiation depth of the laser irradiation range on the outer periphery of the transfer roll, perpendicular to the axial direction of the transfer roll, is narrower than a roll diameter of the transfer roll.

4. The transfer roll cleaning method according to claim 3 , wherein the laser irradiation is performed by rotating the transfer roll so that irradiation areas of the laser irradiation overlap in the circumferential direction of the transfer roll on the outer periphery of the transfer roll.

5. 2. The method for cleaning a transfer roll according to claim 1, wherein the irradiation device is moved intermittently in the axial direction of the transfer roll, and the laser is irradiated from the irradiation device while the movement is stopped.

6. The method for cleaning a transfer roll according to claim 1 , wherein the laser irradiation is performed using a gravure roll as the transfer roll.

7. a support device for supporting the transfer roll; an irradiation device that irradiates a laser beam with an amount of irradiation energy that sublimates the adhesive solidified on the outer periphery of the transfer roll supported by the support device while maintaining the plating film on the outer periphery; A transfer roll cleaning device having the same.

8. The transfer roll cleaning device according to claim 7 , wherein the support device includes a rotation device that intermittently rotates the transfer roll in the circumferential direction.

9. The irradiation device is an irradiation head that performs the laser irradiation; a moving device that intermittently moves the irradiation head in the axial direction of the transfer roll supported by the supporting device; The transfer roll cleaning device according to claim 7, further comprising:

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