Roll cleaning device

Abstract

A roll cleaning device according to one embodiment of the present invention includes a cleaning unit that includes at least one knife and surrounds a target roll so that the at least one knife contacts an outer peripheral surface of the target roll on which foreign matter is present, and an operating unit that is connected to the cleaning unit and moves the at least one knife in a circumferential direction on the outer peripheral surface of the target roll.

Description

[Technical Field]

[0001] The present invention relates to a roll cleaning device and a roll cleaning method, and more particularly to a roll cleaning device and a roll cleaning method that can be operated even at a position far away from a target roll when removing foreign matter present on the target roll.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0122831 dated September 15, 2021, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference. [Background technology]

[0003] Generally, various rollers used in production sites such as steel mills, paper mills, printing, film, food, and chemical factories are subject to adhesion of various types of foreign matter such as cooling water, scale, dust, and oil depending on the manufacturing process and working environment.

[0004] These foreign particles induce marks and contamination on the surface of the product passing through the roller, ultimately causing product defects.

[0005] Furthermore, if the equipment is operated for a long time with foreign matter adhering to the roller surface, the roller surface may be easily damaged or broken.

[0006] For this reason, a roller surface foreign matter removal device is used to remove foreign matter adhering to the roller surface. An example of a conventional roller surface foreign matter removal device is disclosed in Korean Patent Publication No. 10-2012-0091730, entitled "Roller Surface Foreign Matter Removal Device Equipped with a Foreign Matter Blocking Member" (Patent Document 1).

[0007] 1 is a schematic diagram showing the operation of a conventional device for removing foreign matter from a roller surface. As shown, in the conventional device, a blade 2 contacts the surface of roller A at a certain angle to remove foreign matter B from the surface of roller A.

[0008] However, in the disclosed conventional roller surface foreign matter removal device, the blade holder 1 is fixed to one side of the roller A. That is, the blade 2 is fixed in a position where it can come into contact with the surface of the roller A. As a result, when the roller A needs to be separated from the roller rotation shaft for repair or replacement, interference with the blade 2 occurs, making repair difficult. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Korean Patent Publication No. 10-2012-0091730 Summary of the Invention [Problem to be solved by the invention]

[0010] An object of the present invention is to provide a roll cleaning device and a roll cleaning method that can be operated even at a position far away from the target roll when removing foreign matter present on the target roll.

[0011] Another object of the present invention is to provide a roll cleaning device that is detachably provided for a target roll and is capable of cleaning a large number of target rolls without being limited to a specific target roll. [Means for solving the problem]

[0012] A roll cleaning device according to one embodiment of the present invention includes a cleaning unit that includes at least one knife and surrounds the target roll so that the at least one knife comes into contact with the outer peripheral surface of the target roll on which foreign matter is present, and an operating unit that is connected to the cleaning unit and moves the at least one knife in a circumferential direction on the outer peripheral surface of the target roll.

[0013] The cleaning unit may include a cleaning body arranged to surround the target roll, a rotating gear to which the at least one knife is attached and which is arranged on the cleaning body so as to be rotatable along the inner surface of the cleaning body facing the target roll, and a drive gear which is gear-coupled with the rotating gear and whose operating shaft is connected to the operating unit to transmit the rotational force transmitted from the operating unit to the rotating gear.

[0014] Furthermore, at least one knife may be provided so as to protrude toward the target roll via a movement passage formed through the inner circumferential surface of the cleaning body.

[0015] The blade portion can be elastically supported so as to be movable in a direction toward or away from the target roll.

[0016] The cleaning body may also include a first body arranged to surround a portion of the target roll, a second body arranged to surround the remaining portion of the target roll, and a body hinge axis that hinge-connects one end of the first body to one end of the second body.

[0017] The cleaning body may also include a first fastening member provided at the other end of the first body, and a second fastening member provided at the other end of the second body and removably fastened to the first fastening member.

[0018] The rotary gear may include a first gear disposed within the first body, a second gear disposed within the second body, and a gear hinge shaft that hinge-connects the first gear and the second gear.

[0019] In addition, when the first body and the second body are spaced apart around the body hinge axis, the first gear and the second gear may be spaced apart around the gear hinge axis.

[0020] The operating unit may include an extension member having one end coupled to an operating shaft of the drive gear so as to rotate together with the drive gear, and an operating member coupled to the other end of the extension member and providing a rotational force to the extension member at a position spaced apart from the target roll.

[0021] The operating member may include a manually operated operating handle or a drive motor.

[0022] The operating member may be provided so as to be rotatable in both forward and reverse directions.

[0023] In addition, the cleaning unit may include a plurality of guide gears that are arranged in the cleaning body to be able to idle rotate, spaced apart at predetermined intervals along the circumferential direction of the rotary gear, and gear-engaged with the rotary gear. [Effects of the Invention]

[0024] As described above, the roll cleaning device and the roll cleaning method according to at least one embodiment of the present invention have the following effects.

[0025] When removing foreign matter from a target roll, the operation can be performed even at a position far away from the target roll. Specifically, during the roll cleaning process, the operator can perform the cleaning work on the target roll in a space other than the space where the target roll to be cleaned is installed, and the cleaning work on the target roll can be performed without being restricted by the space where the target roll is installed.

[0026] The cleaning device is provided detachably for each target roll, and cleaning is not limited to a specific target roll, but can be performed on a number of target rolls. [Brief explanation of the drawings]

[0027] [Figure 1]1A and 1B are diagrams for schematically explaining an operating state of a foreign matter removal device according to the prior art; [Figure 2] 1 is a diagram for schematically illustrating a state in which a roll cleaning device according to an embodiment of the present invention is provided on a target roll. [Figure 3] 3 is a schematic diagram of a cross section taken along line AA in FIG. 2. [Figure 4] 3A and 3B are diagrams illustrating the structure of a cleaning unit according to an embodiment of the present invention. [Figure 5] 3A and 3B are diagrams illustrating the structure of a cleaning unit according to an embodiment of the present invention. [Figure 6] FIG. 6 is a diagram schematically showing a cross section taken along line XX in FIG. 5. [Figure 7] FIG. 6 is a diagram schematically showing a YY cross section of FIG. 5. [Figure 8] 1 shows a schematic side view of a roll cleaning apparatus according to a preferred embodiment of the present invention; [Figure 9] 10A and 10B are diagrams for explaining the operating state of the cleaning unit when the operating unit is operated in one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] Since the present invention may be modified in various ways and may have various embodiments, specific embodiments will be shown and described in the drawings.

[0029] Terms such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another.

[0030] The terms used in this application are merely used to describe particular embodiments and are not intended to limit the scope of this application. The singular forms include the plural forms unless the context clearly indicates otherwise.

[0031] In this application, the use of terms such as "comprise" or "have" is intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described herein, and is understood not to preclude the possible presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0032] It is also understood that the accompanying drawings in this application may be drawn to an enlarged or reduced scale for the convenience of explanation.

[0033] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A roll cleaning device and a roll cleaning method according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0034] FIG. 2 is a diagram for schematically illustrating a state in which a roll cleaning device according to one embodiment of the present invention is provided on a target roll, and FIG. 3 is a diagram showing a cross section taken along line AA in FIG.

[0035] 4 and 5 are diagrams for explaining the structure of the cleaning unit according to one embodiment of the present invention, and FIGS. 6 and 7 are diagrams schematically showing the XX and YY cross sections of FIG.

[0036] FIG. 8 is a schematic side view of a roll cleaning device according to a preferred embodiment of the present invention, and FIG. 9 is a diagram for explaining the operating state of the cleaning unit when the operating unit is operated in one embodiment of the present invention.

[0037] The roll cleaning device according to one embodiment of the present invention can be operated at a position far away from the target roll when removing foreign matter present on the target roll.

[0038] A roll cleaning device 100 according to one embodiment of the present invention includes a cleaning unit 110 and an operation unit 220.

[0039] Referring to Figures 2 and 3, the roll cleaning device 100 includes a cleaning section 110 that includes at least one knife 160 (160a, 160b, 160c, 160d) and surrounds the target roll 10 so that the at least one knife 160 (160a, 160b, 160c, 160d) comes into contact with the outer surface of the target roll 10 on which foreign matter P is present.

[0040] The roll cleaning device 100 also includes an operating unit 220 connected to the cleaning unit 110 for moving at least one knife 160 (160a, 160b, 160c, 160d) in the circumferential direction on the outer circumferential surface of the target roll 10.

[0041] At least one knife 160 can be rotated and moved along the circumferential direction of the target roll 10 on the outer surface of the target roll 10 via the operating unit 220, and the knife 160 can scrape off foreign matter P present on the outer surface of the target roll 10.

[0042] That is, the knife 160 may be a scraper. When operated by the operating unit 220, the knife 160 maintains contact with the outer circumferential surface of the target roll 10 in the circumferential direction of the target roll 10 and rotates around the center of the target roll 10 in the circumferential direction of the target roll 10.

[0043] 2, the cleaning unit 110 may be provided so as to be movable along the length direction L of the target roll 10. The cleaning unit 110 may also be provided so as to surround at least a portion of the area along the length direction of the target roll 10. With this structure, the cleaning unit 110 can be operated while moving along the length direction L of the target roll 10, thereby cleaning the entire area of ​​the target roll 10 along the length direction L of the target roll 10.

[0044] That is, the roll cleaning device 100 can scrape out and remove foreign matter P present on the target roll 10 by adjusting the operation of the cleaning unit 110 via the operating unit 220 while the cleaning unit 110 is installed on the target roll 10.

[0045] 3 to 5, the cleaning unit 110 includes a cleaning body 120, a rotary gear 130, a drive gear 140, at least one knife 160a to 160d, and at least one guide gear 151, 152, 153, and 154.

[0046] Specifically, the cleaning unit 110 includes a cleaning body 120 arranged to surround the target roll 10, a rotating gear 130 to which the at least one knife 160 is attached and which is arranged on the cleaning body 120 so as to be rotatable along the inner surface 120a of the cleaning body 120 facing the target roll 10, and a drive gear 140 which is gear-coupled with the rotating gear 130 and whose operating shaft is connected to the operating unit 220 to transmit the rotational force transmitted from the operating unit 220 to the rotating gear 130.

[0047] 3 and 4, the cleaning body 120 has a shape that surrounds the target roll 10. The cleaning body 120 has a cleaning space S in which the target roll 10 is placed. The cleaning space S may have a diameter larger than the diameter of the target roll 10, and the cleaning body 120 may have a donut shape with an inner diameter larger than the diameter of the target roll 10 when surrounding the target roll 10. In addition, the cleaning body 120 can be manufactured to match the specifications of the target roll 10.

[0048] A transfer path 120b is provided on the inner peripheral surface 120a of the cleaning body 120 along the circumferential direction of the cleaning body 120 (or the circumferential direction of the target roll). Here, the transfer path 120b is a path that guides the rotational movement of at least one knife 160a to 160d along the circumferential direction of the target roll 10, with the center of the target roll 10 as the reference. At least one knife 160a to 160d is provided protruding toward the outer peripheral surface of the target roll 10 via the transfer path 120b that is formed through the inner peripheral surface 120a of the cleaning body 120.

[0049] The moving path 120b may be formed continuously along the circumferential direction of the target roll 10 on the inner circumferential surface 120a of the cleaning body 120 so that at least one knife can rotate 360 ​​degrees along the circumferential direction of the target roll 10. Alternatively, the moving path 120b may be formed in a partial area of ​​the inner circumferential surface 120a of the cleaning body 120 so that at least one knife can rotate within a predetermined angle along the circumferential direction of the target roll 10.

[0050] In such a structure, when the cleaning body 120 is arranged to surround the target roll 10, at least one knife 160a to 160d protrudes toward the outer surface of the target roll 10 through a moving passage 120b formed through the inner surface 120a of the cleaning body 120, and comes into contact with the outer surface of the target roll 10.

[0051] The cleaning body 120 may be detachably attached to the target roll 10, and may include a first body 121, a second body 123, a body hinge shaft 125, a first fastening member 126, and a second fastening member 127.

[0052] Specifically, the cleaning body 120 may include a first body 121 arranged to surround a portion of the target roll 10, a second body 123 arranged to surround the remaining portion of the target roll 10, and a body hinge axis 125 that hinge-connects one end of the first body 121 to one end of the second body 123.

[0053] The first body 121 and the second body 123 may be bound together to have a donut cross section. The first body 121 has a shape that surrounds a portion of the target roll 10. The second body 123 may form a cleaning space S together with the first body 121 while surrounding the remaining portion of the target roll 10.

[0054] The body hinge shaft 125 hinge-connects one end of the first body 121 to one end of the second body 123. The first body 121 and the second body 123 rotate at a predetermined angle around the body hinge shaft 125, allowing the other end of the first body 121 and the other end of the second body 123 to move apart or approach each other. That is, the other end of the first body 121 and the other end of the second body 123 move apart to position the target roll 10 in the cleaning space S, and the other end of the first body 121 and the other end of the second body 123 move closer to each other when surrounding the target roll 10 for cleaning.

[0055] The first fastening member 126 is provided at the other end of the first body 121, and the second fastening member 127, which is connected to the first fastening member 126, is provided at the other end of the second body 123. The first fastening member 126 and the second fastening member 127 may be detachably connected. As an example, the first fastening member 126 and the second fastening member 127 may be configured with a hook portion and a catcher portion, which are well-known means.

[0056] When the first fastening member 126 and the second fastening member 127 are fastened together, the first body 121 and the second body 123 maintain a state in which they form the cleaning space S. After cleaning is completed, when the first fastening member 126 and the second fastening member 127 are released from the fastening, the first body 121 and the second body 123 spread apart at a predetermined angle around the body hinge shaft 125 so that the cleaning body 120 can be separated from the target roll 10.

[0057] The rotary gear 130 is built into the cleaning body 120. The rotary gear 130 is disposed within the cleaning body 120 so as to be rotatable along the inner circumferential surface 120a of the cleaning body 120. The rotary gear 130 has a substantially ring shape. An installation space for accommodating the rotary gear 130 is provided within the cleaning body 120, and the installation space is formed to be larger than the rotary gear 130. Furthermore, guide gears 151 to 154 may be disposed in the installation space so as to be rotatable idling.

[0058] Furthermore, the rotary gear 130 may be arranged so that at least a portion of the rotary gear 130 is supported by the inner circumferential surface 120a of the cleaning body 120. As will be described later, during cleaning, the rotary gear 130 rotates while being supported by the inner circumferential surface 120a of the cleaning body 120 and the guide gears 151-154 due to the rotation of the drive gear 140. The rotary gear 130 does not have a gear portion formed in the inner circumferential region that faces the inner circumferential surface 120a of the cleaning body 120, but has a gear portion formed in the outer circumferential region opposite the inner circumferential region. As described above, the gear portions of the rotary gear 130 are gear-coupled to the drive gear 140 and the guide gears 151-154, respectively.

[0059] At least one knife 160 (160a to 160d) is attached to the rotating gear 130, and at this time, at least one knife 160a to 160d protrudes toward the outer surface of the target roll 10 through a moving passage 120b formed through the inner surface 120a of the cleaning body 120, and comes into contact with the outer surface of the target roll 10.

[0060] The rotary gear 130 has a structure that expands together with the cleaning body 120. To this end, the rotary gear 130 includes a first gear 131 disposed within the first body 121, a second gear 133 disposed within the second body 123, and a gear hinge shaft 135 that hinge-connects the first gear 131 and the second gear 133.

[0061] The first gear 131 and the second gear 133 are connected to each other, have a ring shape, and are rotatably disposed on the inner circumferential surface of the cleaning body 120. The first gear 131 and the second gear 133 are hingedly connected by a gear hinge shaft 135 and have a structure in which they expand at a predetermined angle around the gear hinge shaft 135. In this structure, when the first body 121 and the second body 123 expand around the body hinge shaft 125, the first gear 131 and the second gear 133 also expand around the gear hinge shaft 135, and the target roll 10 can enter the cleaning space S through the expanded space.

[0062] In addition, a first fastening portion 132 is provided at an end 131a of the first gear 131 that is not hinged, and a second fastening portion 134 is provided at an end 133a of the second gear 133 that is not hinged. As an example, the rotary gear 130 may have a stepped structure that allows the end of the first gear 131 and the end of the second gear 133 to be interlocked with each other by connecting the first fastening portion 132 and the second fastening portion 134. For example, referring to FIGS. 6 and 7, the end of the first gear 131 and the end of the second gear 133 may have a stepped structure that allows them to be inserted into each other so that they are arranged overlapping each other. Furthermore, the first fastening portion 132 and the second fastening portion 134 may be configured with a known fastening structure. For example, the first fastening portion 132 may be formed as a protrusion, and the second fastening portion 134 may be formed as a groove into which the protrusion is inserted. Alternatively, both the first fastening portion 132 and the second fastening portion 134 may be formed as fastening holes. In this case, the first gear 131 and the second gear 133 can be fastened together through a pin or the like inserted into the fastening hole (see the embodiment shown in Figures 6 and 7).

[0063] The cleaning unit 110 is disposed within the cleaning body 120 to be able to idle rotate, and includes a plurality of guide gears 151-154 that are spaced apart at predetermined intervals along the circumferential direction of the rotary gear 130 and gear-engaged with the rotary gear 130. In addition, a driving gear 140 and at least one guide gear 151-154 are gear-engaged with the outer circumferential surface of the rotary gear 130. The driving gear 140 and the plurality of guide gears 151-154 are rotatably mounted within the cleaning body 120 at fixed positions.

[0064] The driving gear 140 is gear-coupled to the rotary gear 130 to transmit a rotational force to the rotary gear 130. An extension member 221 of the operating unit 220 is coupled to an operating shaft 143 of the driving gear 140. The extension member 221 may be detachably coupled to the operating shaft 143 of the driving gear 140. The operating shaft 143 refers to the rotation shaft of the driving gear 140.

[0065] A plurality of guide gears 151 to 154 are gear-coupled to the rotary gear 130. The guide gears guide the rotation of the rotary gear 130 while idling when the rotary gear 130 rotates.

[0066] The guide gears 151 to 154 are arranged radially with the center of the cleaning main body 120 as the reference.

[0067] At least one knife 160 (160a to 160d) is attached to the rotary gear 130. The at least one knife 160a to 160d moves together with the rotary gear 130 in the direction of rotation of the rotary gear 130.

[0068] At least one knife 160a-160d is provided in the cleaning body 120, with one end coupled to the rotary gear 130 and the other end penetrating the transfer path 120b and protruding toward the target roll 10 via the inner circumferential surface 120a of the cleaning body 120. As described above, the transfer path 120b is a path (or opening) provided on the inner circumferential surface of the cleaning body 120 along the circumferential direction of the cleaning body 120. Multiple knives 160a-164d are built into the cleaning body 120, and the multiple knives 160a-164d are arranged at predetermined intervals along the circumferential direction of the target roll 10.

[0069] The knives 160a to 164d each have a blade portion 162 that contacts the outer circumferential surface of the target roll 10. The blade portion 162 can be elastically supported so as to be movable toward or away from the target roll 10. As an example, referring to FIG. 5, the knife 160 can include a base portion 161 attached to the cleaning body 120, a blade portion 162 disposed within the base portion 161 so as to be movable toward or away from the target roll 10, and an elastic member 163 disposed to pressurize the blade portion 162 in the direction toward the target roll 10. The elastic member 163 can be configured to pressurize the blade portion 162 in the direction toward the target roll 10. The knife 160 can also include a holder 165 to which the elastic member 163 is fixed, and a support member 164 disposed within the base portion and to which the holder 165 is attached.

[0070] The multiple knives 160a to 160d are arranged radially from the center of the cleaning body 120, and are connected to each other so as to protrude toward the outer circumferential surface of the target roll 10. At this time, the knife 160 can maintain the blade 162 in contact with the outer circumferential surface of the target roll 10 according to the structure in which the blade 162 is pressed in the direction approaching the target roll 10.

[0071] In each of the knives 160a to 160d, the contact area 162a of the blade portion 162 that comes into contact with the target roll 10 has an arc shape. The contact area 162a of the blade portion 162 may be curved with a predetermined curvature, and the blade portion 162 may have a shape in which the center of the contact area 162a is recessed inward. Furthermore, the contact area 162a of the blade portion 162 may be curved with the same curvature as the curvature of the outer peripheral surface of the target roll 10. In this structure, when removing foreign matter, the knife 160 scrapes out only the foreign matter as it moves along the target roll 10, preventing damage to the surface of the target roll 10.

[0072] The operating unit 220 is connected to the cleaning unit 110 and functions to operate the position of the knife 160 so that the knife 160 moves in the circumferential direction of the target roll 10. The operating unit 220 may include an extension member 221, an operating member 222, and a support member 223.

[0073] Specifically, the operating unit 220 includes an extension member 221 having one end coupled to the operating shaft 143 of the drive gear 140 so as to rotate together with the drive gear 140. One end 221a of the extension member 221 is coupled to the operating shaft 143 of the drive gear 140. An operating member 222 is coupled to the other end 221b of the extension member. The extension member 221 is arranged to be aligned with the target roll 10 along the length direction of the target roll 10, and transmits the rotational force of the operating member 222 to the drive gear 140. As an example, the extension member 221 may be made of a flexible material.

[0074] The operating unit 220 may also include an operating member 222 coupled to the other end of the extension member 221 and providing a rotational force to the extension member 221 at a position spaced apart from the target roll 10 .

[0075] The operating member 222 is coupled to the other end 221b of the extension member 221 to rotate the extension member 221. As an example, the operating member may include a manually operated operating handle or a drive motor. The operating member 222 may be a manually operated operating handle. As another example, the operating member 222 may be a drive motor whose rotation direction and rotation speed are adjustable. The operating member 222 may be rotatable in both forward and reverse directions.

[0076] The extension member 221 may be spaced apart from an upper portion of the bottom surface of the installation location of the operating unit 220. The extension member 221 may be spaced apart from the bottom surface by a support member 223. The support member 223 is provided on the bottom surface of the installation location and rotatably supports the extension member 221.

[0077] The cleaning unit 110 may further include a foreign matter detector provided in the cleaning body 120 for detecting foreign matter P on the target roll 10 .

[0078] The foreign matter detector is provided in the cleaning body 120 and detects foreign matter P on the target roll 10. The foreign matter detector can be linked to a display unit (not shown). The monitoring unit is communicatively connected to the foreign matter detector and can display the presence or absence of foreign matter on the target roll 10 in real time.

[0079] Referring to Figures 8 and 9, when the operating unit 220 is activated, if an operator rotates the operating member 222 in a predetermined direction at a position far away from the target roll 10, the drive gear 140 connected to the extension member 221 rotates in the same rotation direction R1 as the rotation direction of the operating member, and accordingly, the rotating gear 130 rotates, causing the knives 160a to 160d to rotate.

[0080] At this time, at least one of the knives 160a to 160d can remove foreign matter P present on the target roll 10. This process can be repeated by changing the position of the cleaning unit 110 along the length direction L of the target roll 10.

[0081] The above-described embodiment of the present invention has been disclosed for illustrative purposes, and a person skilled in the art having ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions are deemed to fall within the scope of the following claims. [Industrial Applicability]

[0082] During the roll cleaning process, the operator can perform the cleaning work on the target roll in a space other than the space where the target roll to be cleaned is installed, and the cleaning work on the target roll can be performed without being restricted by the space where the target roll is installed.

Claims

1. a cleaning section including at least one knife surrounding the target roll so that the at least one knife comes into contact with the outer peripheral surface of the target roll on which the foreign matter is present; an operating unit connected to the cleaning unit and configured to move the at least one knife along a circumferential direction on an outer circumferential surface of the target roll; The cleaning unit includes: A cleaning body provided to surround the target roll; a rotary gear arranged in the cleaning body so as to be rotatable along an inner circumferential surface of the cleaning body facing the target roll, the at least one knife is attached to the rotating gear; The cleaning unit further includes a drive gear that is gear-coupled with the rotary gear, and has an operating shaft connected to the operating unit to transmit rotational force transmitted from the operating unit to the rotary gear.

2. The roll cleaning device according to claim 1 , wherein the at least one knife is provided so as to protrude toward the target roll via a movement passage formed through the inner circumferential surface of the cleaning body.

3. The roll cleaning device according to claim 2 , wherein a plurality of knives are built into the cleaning body, and the plurality of knives are arranged at predetermined intervals along the circumferential direction of the target roll.

4. The roll cleaning device according to claim 2 , wherein the knife has a blade portion that comes into contact with the outer circumferential surface of the target roll, and the blade portion is curved at a predetermined curvature.

5. The roll cleaning device according to claim 4 , wherein the blade portion is curved with the same curvature as the curvature of the outer circumferential surface of the target roll.

6. The roll cleaning device according to claim 4 , wherein the blade portion is elastically supported so as to be movable in a direction toward or away from the target roll.

7. The cleaning body includes: A first main body provided to surround a portion of the target roll; A second body provided to surround a remaining portion of the target roll; The roll cleaning device of claim 1 , further comprising: a body hinge shaft that hingeably connects one end of the first body and one end of the second body.

8. The cleaning body includes: a first fastening member provided at the other end of the first body; The roll cleaning device of claim 7 , further comprising: a second fastening member provided at the other end of the second body and removably fastened to the first fastening member.

9. The rotating gear is a first gear disposed within the first body; a second gear disposed within the second body; The roll cleaning device of claim 7 , further comprising: a gear hinge shaft that hinge-connects the first gear and the second gear.

10. The roll cleaning apparatus of claim 9 , wherein the first gear and the second gear expand about the gear hinge axis when the first body and the second body expand about the body hinge axis.

11. The operation unit includes: an extension member having one end coupled to the operating shaft of the drive gear so as to rotate together with the drive gear; The roll cleaning device of claim 1 , further comprising: an operating member coupled to the other end of the extension member, the operating member applying a rotational force to the extension member at a position spaced apart from the target roll.

12. The roll cleaning apparatus of claim 11 , wherein the operating member includes a manually operated operating handle or a drive motor.

13. The roll cleaning device according to claim 11 , wherein the operating member is rotatable in both forward and reverse directions.

14. The cleaning unit includes:

2. The roll washing device according to claim 1, further comprising: a plurality of guide gears arranged in the washing body so as to be rotatable in an idle manner, spaced apart at predetermined intervals along the circumferential direction of the rotary gear, and gear-coupled to the rotary gear.

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