Air knife cleaning device

Abstract

The present invention discloses an air knife cleaning device, comprising: a left-right moving module, which is provided to be able to move in the left-right direction between an upper knife lip and a lower knife lip through a driving unit, and the upper knife lip and the lower knife lip are provided with nozzles of a shape extending in the left-right direction at the front ends in the air knife; a first front-to-back moving component and a second front-to-back moving component, which are provided on the left and right sides of the left-to-right moving module to move in the front-to-back direction respectively and have a first front cleaning head that contacts the front face of the upper knife lip and a second front cleaning head that contacts the front face of the lower knife lip respectively; a first elastic component and a second elastic component, which maintain the state in which the first front cleaning head and the second front cleaning head are respectively adsorbed on the front face of the upper knife lip and the front face of the lower knife lip through elastic force.

Description

Technical Field

[0001] Embodiments of the present invention relate to a cleaning device for removing foreign matter from a lip of an air knife. Background Art

[0002] Generally, in a hot-dip coating process, an air knife is used to maintain a constant thickness of metal (eg, zinc (Zn)) coated on a steel sheet, and an air knife cleaning device is used to clean the air knife.

[0003] Air knives are provided at the rear ends of a pair of plating tanks, facing each other with a constant distance therebetween. After being deposited on molten metal in the plating tanks, a steel plate passes between the pair of air knives. The pair of air knives sprays gas (e.g., air) at high pressure onto the steel plate. The amount of molten metal adhering to the surface of the steel plate is controlled by a wiping jet generated by the sprayed high-pressure gas.

[0004] like Figure 1 As shown, the air knife serves as a passage for ejecting gas and has a nozzle 2 disposed at the front end. The nozzle 2 is arranged in an elongated shape in the left-right direction. The air knife includes a blade lip forming the front of the nozzle 2. The blade lips are combined to form an upper blade lip 10 and a lower blade lip 20 that form the nozzle 2. The upper blade lip 10 and the lower blade lip 20 are provided with front faces 11 and 21, respectively, that form the front end of the nozzle 2. The upper blade lip 10 has an inner upper surface 12 that forms the upper portion of the nozzle 2, and the lower blade lip 20 has an inner lower surface 22 that forms the lower portion of the nozzle 2.

[0005] The molten metal may splash due to the cleaning spray, and the splashed molten metal may adhere to the lip (especially the nozzle) of the air knife. In order to maintain the gas injection pressure of the air knife evenly, the air knife cleaning device can remove foreign matter such as molten metal (for example, zinc flakes) attached to the lip nozzle side. Figure 2 As shown, the air knife cleaning device includes a washer 40 disposed between the upper cutting lip 10 and the lower cutting lip 20. The washer 40 has a plate-like structure and includes multiple cleaning tips. Specifically, the washer 40 contacts the front surface 11 of the upper cutting lip 10 and the front surface 21 of the lower cutting lip 20, respectively, and includes an upper cleaning tip 41 and a lower cleaning tip 42 for removing various foreign matter from the tip of the nozzle 2.

[0006] However, in order to remove the gas jet state from the air knife, if the position of the upper lip 10 or the lower lip 20 of the air knife cleaning device is adjusted in the front-back direction to change the positional relationship between the upper lip 10 and the lower lip 20, the upper cleaning head 41 may be Figure 2 (a) is separated from the front surface 11 of the upper lip 10 (see the spacing G1) or the lower cleaning head 42 is as shown Figure 2As shown in (b), the nozzle 2 is spaced apart from the front surface 21 of the lower lip 20 (see the gap G2), so there is a problem that foreign matter attached to the front end side of the nozzle 2 cannot be accurately removed.

[0007] In addition, due to long-term use, the upper cleaning head 41 and the lower cleaning head 42 may be worn or deformed, which may cause the contact state of the upper cleaning head 41 with the front surface 11 of the upper blade lip 10 or the contact state of the lower cleaning head 42 with the front surface 21 of the lower blade lip 20 to be poor or disassembled, which may reduce the efficiency of foreign matter removal.

[0008] (Patent Document 1) Korean Patent Publication No. 10-1998-0047222 (September 15, 1998)

[0009] (Patent Document 2) Korean Patent Publication No. 10-2003-0093586 (December 11, 2003)

[0010] (Patent Document 3) Korean Patent Publication No. 10-2006-0055923 (May 24, 2006)

[0011] (Patent Document 4) Korean Patent Publication No. 10-2010-0051365 (May 17, 2010)

[0012] (Patent Document 5) Korean Patent Gazette No. 10-1001707 (December 15, 2010)

[0013] (Patent Document 6) Korean Patent Publication No. 10-2012-0074642 (July 6, 2012)

[0014] (Patent Document 7) Korean Patent Publication No. 10-2017-0006956 (January 18, 2017)

[0015] (Patent Document 8) Korean Patent Publication No. 10-2017-0029719 (March 16, 2017) Summary of the Invention

[0016] An embodiment of the present invention provides an air knife cleaning device, which can maintain the cleaning head in a state of accurate contact with the front surface of the upper blade lip and the front surface of the lower blade lip, regardless of changes in the positional relationship between the upper blade lip and the lower blade lip, or wear or deformation of the cleaning head.

[0017] The problems to be solved are not limited to these, and a person skilled in the art can clearly understand other problems not mentioned from the following description.

[0018] According to the present invention, an embodiment of the present invention is provided, which may be to provide an air knife cleaning device, the air knife cleaning device comprising: a left-right moving module, provided to be movable in the left-right direction between an upper knife lip and a lower knife lip, the upper knife lip and the lower knife lip having nozzles extending in the left-right direction at their front ends in the air knife; a driving unit to move the left-right moving module; a first front-back moving component and a second front-back moving component, provided on the left and right sides of the left-right moving module to be movable in the front-back direction respectively; a first cleaner and a second cleaner, the first cleaner being connected to the first front-back moving component and being arranged to move in the left-right direction through The nozzle is located in front of the nozzle and the exposed front end thereof contacts the front of the upper blade lip, and the second cleaner is connected to the second front-to-back moving component and is arranged with a second front-to-back cleaning head in contact with the front of the lower blade lip through the front end thereof exposed in front of the nozzle; the first elastic component and the second elastic component respectively move the first front-to-back moving component and the second front-to-back moving component backward along the front-to-back direction through elastic force so that the first front-to-back cleaning head and the second front-to-back cleaning head are respectively adsorbed on the front of the upper blade lip and the front of the lower blade lip.

[0019] The first front cleaning head may include: a first supporting portion disposed from the front end of the first cleaning device so as to face the front face of the upper cutting lip; and a first scraping portion inclined rearwardly from the left or right side of the first supporting portion so as to face the front face of the upper cutting lip. The second front cleaning head may include: a second supporting portion disposed from the front end of the second cleaning device so as to face the front face of the lower cutting lip; and a second scraping portion inclined rearwardly from the left or right side of the second supporting portion so as to face the front face of the lower cutting lip.

[0020] The first cleaning device may include a first inner surface cleaning head, the first inner surface cleaning head being in contact with either the inner upper surface of the upper blade lip or the inner lower surface of the lower blade lip behind the first front cleaning head. The second cleaning device may include a second inner surface cleaning head, the second inner surface cleaning head being in contact with the other of the inner upper surface of the upper blade lip or the inner lower surface of the lower blade lip behind the second front cleaning head.

[0021] It can be that the left-right moving module has a first front-rear guide and a second front-rear guide, and the first front-rear guide and the second front-rear guide are respectively on the left and right outer sides of the first front-rear moving component and the second front-rear moving component to guide the front-rear movement of the first front-rear moving component and the second front-rear moving component.

[0022] The left-right moving module may include a stopper disposed at the rear between the first front-to-back moving component and the second front-to-back moving component. The first front-to-back moving component and the second front-to-back moving component may each include a stopper surface that contacts the stopper according to a rearward moving distance.

[0023] The first front-to-back movable member and the second front-to-back movable member may each be provided with a coupling groove on their upper portion. The first washer and the second washer may each be provided with a coupling head at their rear end, the coupling head being inserted into the coupling groove of the first front-to-back movable member and the coupling groove of the second front-to-back movable member.

[0024] The left-right movable module may be provided with a first supporting surface and a second supporting surface facing rearward on the left and right sides of the rear portion, respectively. The first front-to-back movable component and the second front-to-back movable component may each include a first bracket opposite the first supporting surface and a second bracket opposite the second supporting surface. The first elastic component may be interposed between the first supporting surface and the first bracket to impart an elastic force to the first front-to-back movable component toward the rear. The second elastic component may be interposed between the second supporting surface and the second bracket to impart an elastic force to the second front-to-back movable component toward the rear.

[0025] The first bracket and the second bracket may have reinforcing protrusions inserted into the inside of the first elastic member and the inside of the second elastic member, respectively.

[0026] The driving unit may include a flexible traction line that pulls and moves the left-right movable module in the left-right direction. The traction line may include a fixed block in the middle portion. The left-right movable module may be provided with a connection portion connected to the middle portion of the traction line at the front. The connection portion may include: an arc-shaped insertion space, the middle portion of the traction line is inserted into the insertion space from top to bottom, and the left and right ends of the insertion space are respectively open to the front; a guide space, which extends from the left and right ends of the insertion space to both sides along the left-right directions to guide the two side portions connected to the two ends of the middle portion of the inserted traction line respectively to the left and right directions; and a fixed space, which is connected to the middle area of ​​the insertion space and is formed to provide a platform for limiting the movement of the fixed block on the middle portion of the inserted traction line by playing a hooking role on the left and right.

[0027] According to an embodiment of the present invention, if the position of the upper lip or the lower lip is adjusted in the front-to-back direction to change the positional relationship between the upper lip and the lower lip, the upper lip cleaner moves together with the upper lip and the first front cleaning head of the upper lip cleaner is maintained in a state of being adsorbed on the front of the upper lip, and the lower lip cleaner moves together with the lower lip and the second front cleaning head of the lower lip cleaner is maintained in a state of being adsorbed on the front of the lower lip. Therefore, regardless of the change in the positional relationship between the upper lip and the lower lip, the first front cleaning head and the second front cleaning head can be maintained in a state of being accurately adsorbed on the front of the upper lip and the front of the lower lip. In order to clean the lip of the air knife, foreign matter can be thoroughly and accurately removed from the front of the upper lip and the front of the lower lip when the left and right moving modules move.

[0028] Therefore, the embodiment of the present invention can evenly maintain the gas injection pressure through the nozzle of the air knife to prevent the quality of the product from being degraded. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a cross-sectional view of the blade lip of a conventional air knife as viewed from the right.

[0030] Figure 2 (a) and (b) are views of a state where an air knife cleaning device according to the prior art is applied to a knife lip of an air knife as viewed from the right side, and these views illustrate problems of the prior art.

[0031] Figure 3 and Figure 4 The figures show a top view and a right side view of an air knife of an air knife cleaning device according to an embodiment of the present invention.

[0032] Figure 5 against Figure 4 Cross-sectional view of part A.

[0033] Figures 6 to 8 A perspective view, a top view, and a rear view are respectively shown of a lip cleaner assembly of an air knife cleaning device according to an embodiment of the present invention.

[0034] Figure 9 yes Figure 7 BB line cross-section diagram.

[0035] Figure 10 yes Figure 9 CC line cross-section diagram.

[0036] Figure 11 (a) and (b) are viewed in different directions. Figure 6 、 Figure 7 A three-dimensional diagram of the left and right moving module is shown.

[0037] Figure 12 It shows Figures 6 to 8 A stereoscopic view of the upper lip cleaner, the lower lip cleaner, the first elastic component, and the second elastic component shown in FIG.

[0038] Figure 13 (a) and (b) are based on Figure 5 The cross-sectional view shows the operation of the air knife cleaning device according to the embodiment of the present invention.

[0039] (Explanation of Reference Numerals)

[0040] 2: Nozzle of air knife

[0041] 10: Upper lip of the air knife

[0042] 11: The front of the upper lip

[0043] 12: Inside of the upper lip

[0044] 20: Lower lip of the air knife

[0045] 21: The front of the lower lip

[0046] 22: The inner side of the lower lip

[0047] 100: Drive unit

[0048] 200: Lip cleaner assembly

[0049] 210: Base block

[0050] 220: Moving wheel

[0051] 230A: First forward and backward moving part

[0052] 230B: Second forward and backward moving part

[0053] 240A: First cleaner

[0054] 240B: Second cleaner

[0055] 250A: First elastic component

[0056] 250B: Second elastic member DETAILED DESCRIPTION

[0057] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0058] The air knife cleaning device according to the embodiment of the present invention can be used to clean an air knife for removing molten metal attached to the surface of a steel plate in a hot dip coating process. Figures 3 to 13 The structure and operation of the air knife cleaning device according to an embodiment of the present invention are shown.

[0059] Reference Figure 3 、 Figure 4 The air knife cleaning device according to an embodiment of the present invention includes a lip cleaning device assembly 200 for cleaning the air knife lip while moving between the upper lip 10 and the lower lip 20 of the air knife (inside the air knife lip) along the left-right direction (refer to the X direction), and a driving unit 100 for moving the lip cleaning device assembly 200 in the left-right direction. Figure 1 As described above, the air knife is a passage for ejecting gas such as air, and has a nozzle arranged long in the left-right direction at the front end (see Figure 1 2), the upper lip 10 and the lower lip 20 of the knife lip are configured to be combined with each other to provide a nozzle. Thus, the upper lip 10 and the lower lip 20 each have a front face forming the front end of the nozzle (refer to Figure 1 11, 21). In addition, the upper lip 10 has an inner upper surface forming the upper part of the nozzle (refer to Figure 1 12), the lower lip 20 has an inner bottom portion forming the lower portion of the nozzle (refer to Figure 1 22).

[0060] Reference Figure 5 、 Figure 6 Etc., the lip cleaner assembly 200 includes a left-right moving module (refer to 210, 220), an upper lip cleaner (refer to 230A, 240A) and a lower lip cleaner (refer to 230B, 240B), a first elastic component 250A and a second elastic component 250B. The left-right moving module can move in the left-right direction between the upper lip 10 and the lower lip 20 through the driving unit 100. If the left-right moving module moves, the upper lip cleaner moves in the left-right direction together with the lower lip cleaner and the left-right moving module. The upper lip cleaner and the lower lip cleaner can move in the front-to-back direction (refer to the Y direction) on the left-right moving modules respectively. The upper lip cleaner has a first front cleaning head (refer to 241A, 242A), and the lower lip cleaner has a second front cleaning head (refer to 241B, 242B). The first front cleaning head can be connected to the front of the upper lip 10 (refer to Figure 1 11) contact, the second front cleaning head can be in contact with the front of the lower lip 20 (refer to Figure 1 If the left and right moving modules move, the first and second front cleaning heads can scrape and remove foreign matter such as zinc flakes from the front surfaces of the upper and lower lip 10, 20, respectively. The first and second elastic components 250A and 250B can utilize elastic forces to elastically attach the first and second front cleaning heads to the front surfaces of the upper and lower lip 10, 20, respectively.

[0061] Reference Figure 6 、 Figure 7 、 Figure 10 、 Figure 11The left and right moving module includes a base block 210 and one or more moving wheels 220 that provide mobility to the base block 210. Figure 5 , the lower lip 20 can be in the nozzle (refer to Figure 1 2) are arranged long in the left-right direction behind the module (see 23 and 24) to guide the left-right movable module. The movable wheel 220 may be a bearing, a roller, a wheel, or the like. The movable wheel 220 may be provided on the left and right sides of the two base blocks 210, rotatable about an axis in the vertical direction (see the Z direction). The movable wheel 220 has a diameter larger than the front-to-back dimension of the base block 210 and is configured to protrude forward and backward from the base block 210. The module guide may include a module receiving groove 23 and a guide groove 24. The module receiving groove 23 can accommodate the base block 210. The module receiving groove 23 may be a groove extending in the left-right direction with an open top portion that communicates with the space between the upper blade lip 10 and the lower blade lip 20. The guide groove 24 may be formed long in the left-right direction from the front and back walls of the module receiving groove 23. The movable wheel 220 may be inserted into the left and right guide grooves 24, with its edges contacting the guide grooves 24 and rolling along the guide grooves 24.

[0062] Reference Figure 3 and Figure 4 The driving unit 100 includes a driving circle 110 that provides driving force and a transmission mechanism 120 that transmits the driving force of the driving circle 110 to the left and right moving modules (refer to 210, 220) in the left and right directions. The transmission mechanism 120 includes a flexible traction line 121, and the driving unit 100 is configured to pull and move the left and right moving modules in the left and right directions through the traction line 121. The driving circle 110 can be a transmission device provided on the air knife body 30 and having a moving body 112 that performs a reciprocating motion. The traction line 121 can be in a state where the middle part 122 is connected to the base block 210 (refer to Figure 10 ) and the two end portions are respectively connected to the moving body 112. The transmission mechanism 120 may further include a wire guide 125. The wire guide 125 guides the middle portion 122 and the two end portions of the traction wire 121 between the moving body 112 and the base block 210, so that when the moving body 112 moves, the traction wire 121 accurately pulls the base block 210 to the left or right along the moving direction of the moving body 112. For example, the traction wire 121 may be a rope or a wire, and the wire guide 125 may be a roller.

[0063] like Figure 10 As shown, the middle portion 122 of the traction line 121 is connected to the front portion of the base block 210, and the base block 210 is provided with connection parts 214, 215, 216 connected to the middle portion 122 of the traction line 121 at the front (see Figure 11The traction wire 121 is guided by the wire guide 125 so that the two side portions 123 connected to the two ends of the middle portion 122 have straight sections extending to both sides along the left-right direction based on the base block 210, which can be beneficial in improving transmission efficiency.

[0064] Reference Figure 6 、 Figure 10 as well as Figure 11 (In particular, (a)), the connection portion is configured to include an insertion space 214 , a guide space 215 , and a fixing space 216 .

[0065] The middle portion 122 of the pull wire 121 is inserted into the insertion space 214 of the connecting portion. Furthermore, the insertion space 214 is formed with an open top, allowing the middle portion 122 of the pull wire 121 to be inserted downward from the top. Furthermore, the insertion space 214 may be formed in an arc shape with both left and right ends open forward. The middle portion 122 of the pull wire 121 is inserted into the insertion space 214 in a curved arc corresponding to the insertion space 214. The side portions 123, each connected to the ends of the middle portion 122, are then drawn out of the insertion space 214 through the left and right ends of the insertion space 214. Thus, the pull wire 121, with its middle portion 122 inserted into the insertion space 214, can be maintained in a position that is difficult to dislodge upward from the insertion space 214.

[0066] The guide space 215 may be connected to the insertion space 214 and extend from the left and right ends of the insertion space 214 in the left-right direction. This guide space 215 is configured to guide the traction wire 121, which is drawn out of the insertion space 214, in a manner different from the arc-shaped middle portion 122, so that the traction wire 121's two side portions 123 extend in straight lines in the left-right direction. For reference, the guide space 215 may be configured below the moving wheel 220 to prevent interference between the guided traction wire 121's two side portions 123 and the moving wheel 220 in the left-right direction.

[0067] The traction wire 121 has a fixing block 124. The fixing block 124 is provided on the middle portion 122 of the traction wire 121 to increase the thickness of a portion of the middle portion 122 and to be inserted into the insertion space 214 together with the middle portion 122 of the traction wire 121. A fixing space 216 is connected to the middle area of ​​the insertion space 214. The fixing space 216 provides a platform 217 that acts as a hook on both sides to restrict movement of the fixing block 124 inserted into the insertion space 214 together with the middle portion 122 of the traction wire 121. Due to the hooking action of the platform 217 provided by the fixing space 216, the traction wire 121, whose middle portion 122 is inserted into the insertion space 214, is constrained or restricted from moving left and right within the insertion space 214. Therefore, the traction wire 121 can pull the left and right movement module (see 210 and 220) in the left and right directions.

[0068] like Figure 6 、 Figure 7 、 Figure 12 As shown in FIG. 1 , the upper lip cleaner includes a first front-rear moving component 230A and a first plate-shaped cleaner 240A, and the lower lip cleaner includes a second front-rear moving component 230B and a second plate-shaped cleaner 240B.

[0069] The first front-back moving member 230A and the second front-back moving member 230B are provided above the base block 210 so as to be movable in the front-back direction, respectively, and are arranged adjacent to each other in the left and right directions. Figure 8 、 Figure 11 The first front-to-back movable member 230A can be accurately moved forward and backward by the first front-to-back guide member 211A, and the second front-to-back movable member 230B can be accurately moved forward and backward by the second front-to-back guide member 211B. The first front-to-back guide member 211A and the second front-to-back guide member 211B are arranged on the base module 210. The first front-to-back guide member 211A and the second front-to-back guide member 211B are configured to be provided at the left and right outer sides of the first front-to-back movable member 230A and the second front-to-back movable member 230B, and guide the front-to-back movement of the first front-to-back movable member 230A and the front-to-back movement of the second front-to-back movable member 230B respectively. As an example, the first front-to-back guide member 211A and the second front-to-back guide member 211B can be provided in a long slot shape in the front-to-back direction. Furthermore, the first front-rear movable member 230A and the second front-rear movable member 230B may respectively have a protruding portion that can slide along the first front-rear guide member 211A when inserted into the first front-rear guide member 211A, and a protruding portion that can slide along the second front-rear guide member 211B when inserted into the second front-rear guide member 211B.

[0070] The first cleaning device 240A has a first rear end connected to the first front-rear moving member 230A, and a nozzle (refer to Figure 1 2) exposed first front end portion. The first washer 240A passes through the nozzle, and the first front end portion is disposed at the front end portion of the nozzle. The second washer 240B has a second rear end portion connected to the second forward and backward moving member 230B, and a second front end portion exposed through the nozzle. The second washer 240B passes through the nozzle, and the second front end portion is disposed at the front end portion of the nozzle.

[0071] Reference Figure 6 、 Figure 12 The first cleaning device 240A and the second cleaning device 240B and the first front cleaning head and the second front cleaning head mentioned above are respectively arranged at the first front end and the second front end. The first front cleaning head has a protrusion from the first front end of the first cleaning device 240A to the front of the upper lip 10 (refer to Figure 1 The first support portion 241A is opposite to the first support portion 241A of the upper lip 10 and has a first scraping portion 242A that contacts the front surface of the upper lip 10 so as to be tilted backward from the left or right side of the first support portion 241A toward the front surface of the upper lip 10. The second front cleaning head has a second front end portion of the second cleaning device 240B that protrudes downward from the second front end portion of the second cleaning device 240B to contact the front surface of the lower lip 20 (refer to FIG. Figure 1 The first front cleaning head and the second front cleaning head can be provided by bending the front portion of the first washer 240A upward and rearward, and bending the front portion of the second washer 240B downward and rearward, respectively. For example, the first washer 240A and the second washer 240B can be made of metal. The base portion (equivalent to the fixed end) and the front end portion (equivalent to the free end) of each of the first scraping portion 242A and the second scraping portion 242B are supported by the first support portion 241A and the second support portion 241B. Since the first cleaning element 240A and the second cleaning element 240B are plate-shaped and thus have elastic properties, the first support portion 241A and the second support portion 241B can bend slightly forward and tilt backward to a certain degree, and then return to their original state. This allows the first scraping portion 242A and the second scraping portion 242B to maintain contact with the front surface of the upper lip 10 and the lower lip 20, respectively.

[0072] Reference Figure 6 、 Figure 7 as well as Figure 12The first cleaning device 240A has a first front cleaning head (refer to 241A, 242A) behind and on the inner surface of the upper lip 10 (refer to Figure 1 12) contacting the first inner cleaning head 243A, the second cleaning device 240B has a second front cleaning head (refer to 241B, 242B) behind the inner bottom of the lower lip 20 (refer to Figure 1 22) in contact with the second inner surface cleaning head 243B. To this end, if the left and right moving modules (refer to 210, 220) move, the first inner surface cleaning head 243A and the second inner surface cleaning head 243B can remove foreign matter such as zinc flakes from the inner upper surface of the upper lip 10 and the inner lower surface of the lower lip by scraping, respectively. The first inner surface cleaning head 243A can be provided by bending the left or right side of the rear part of the first front cleaning head from the first washer 240A upward, and the second inner surface cleaning head 243B can be provided by bending the left or right side of the rear part of the second front cleaning head from the second washer 240B downward. Depending on the implementation conditions, etc., the first inner surface cleaning head 243A can be arranged in the second washer 240B instead of the first washer 240A, or the second inner surface cleaning head 243B can be arranged in the first washer 240A instead of the second washer 240B.

[0073] Reference Figure 7 and Figure 11 In (b), the first front-to-back movable member 230A has a first coupling groove 234A at its upper portion, and the first washer 240A has a first coupling head 244A at its first rear end portion that is inserted into the first coupling groove 234A. The second front-to-back movable member 230B has a second coupling groove 234B at its upper portion, and the second washer 240B has a second coupling head 244B at its second rear end portion that is inserted into the second coupling groove 234B. The first coupling groove 234A and the second coupling groove 234B can be formed to be recessed downward, with the first coupling head 244A and the second coupling head 244B protruding downward from the first rear end portion of the first washer 240A and the second rear end portion of the second washer 240B, respectively. The first coupling head 244A and the second coupling head 244B can be provided by bending the rear portion of the first washer 240A and the rear portion of the second washer 240B downward. The first cleaner 240A and the second cleaner 240B can be fixed in position by fastening to the first front-and-rear moving part 230A and the second front-and-rear moving part 230B by means of fastening factors such as screws when the first bonding head 244A is positioned to be inserted into the first bonding groove 234A and the second bonding head 244B is positioned to be inserted into the second bonding groove 234B, respectively.

[0074] In order to make the first front cleaning head (refer to 241A, 242A) elastically adsorbed on the front surface of the upper lip 10 (refer to Figure 1 11), the first elastic member 250A provides elastic force to the first front-back moving member 230A in the front-back direction to move the first front-back moving member 230A backward. In order to make the second front cleaning head (refer to 241B, 242B) elastically adsorbed on the front side of the lower lip 20 (refer to Figure 1 21), the second elastic member 250B provides elastic force to the second front-to-back moving member 230B rearward along the front-to-back direction, so that the second front-to-back moving member 230B moves rearward.

[0075] Reference Figure 9 、 Figure 10 The base block 210 is provided with a first supporting surface 213A and a second supporting surface 213B facing the rear on the left and right sides of the rear portion. The base block 210 is provided with a first insertion groove for accommodating the first elastic member 250A and a second insertion groove for accommodating the second elastic member 250B on the left and right sides of the rear portion. The first insertion groove and the second insertion groove are formed in an open shape at the rear portion. The front portion of the first insertion groove provides the first supporting surface 213A, and the front portion of the second insertion groove provides the second supporting surface 213B. Figure 8 、 Figure 10 、 Figure 11 (b) and Figure 12 The first front-to-back movable member 230A and the second front-to-back movable member 230B each have a first bracket 236A opposite the first supporting surface 213A and a second bracket 236B opposite the second supporting surface 213B. The first bracket 236A can be disposed at the rear portion of the first front-to-back movable member 230A, and the second bracket 236B can be disposed at the rear portion of the second front-to-back movable member 230B.

[0076] like Figure 10 As shown, the first elastic member 250A and the second elastic member 250B are respectively interposed in a compressed state between the first support surface 213A and the first bracket 236A and between the second support surface 213B and the second bracket 236B, thereby applying an elastic force to the first front-rear movable member 230A and the second front-rear movable member 230B in a rearward direction. The first elastic member 250A is inserted into the first insertion groove providing the first support surface 213A, with its ends supported by the first support surface 213A and the first bracket 236A, respectively. The second elastic member 250B is inserted into the second insertion groove providing the second support surface 213B, with its ends supported by the second support surface 213B and the second bracket 236B, respectively.

[0077] like Figure 10 as well as Figure 12As shown, the first bracket 236A has a first reinforcing protrusion 237A inserted into the interior of the first elastic member 250A between the first bracket 236A and the first supporting surface 213A in the front-to-back direction to prevent the first elastic member 250A from being dislocated during the front-to-back movement of the upper lip cleaner (see 230A and 240A). The second bracket 236B has a second reinforcing protrusion 237B inserted into the interior of the second elastic member 250B between the second bracket 236B and the second supporting surface 213B in the front-to-back direction to prevent the second elastic member 250B from being dislocated during the front-to-back movement of the lower lip cleaner (see 230B and 240B). As an example, the first elastic member 250A and the second elastic member 250B may be coil springs, and the first reinforcing protrusion 237A and the second reinforcing protrusion 237B may be inserted into the internal spaces of the coil springs, respectively. As another example, the first elastic member 250A and the second elastic member 250B may be blocks made of elastic material such as rubber and may be formed to have grooves in the front-rear direction into which the first reinforcing protrusion 237A and the second reinforcing protrusion 237B are inserted.

[0078] Reference Figure 8 、 Figure 10 、 Figure 11 (b) and the like, the base block 210 includes a stopper 212 disposed at the rear between the first front-to-back movable member 230A and the second front-to-back movable member 230B. When the first front-to-back movable member 230A and the second front-to-back movable member 230B each move rearward a constant distance, the stopper 212 includes a first blocking surface 232A and a second blocking surface 232B that contact the stopper 212. The stopper 212 is provided in an upwardly protruding shape. When the first front-to-back movable member 230A moves rearward a constant distance and the first blocking surface 232A contacts the stopper 212, the first front-to-back movable member 230A is prevented from further backward movement. When the second front-to-back movable member 230B moves rearward a constant distance and the second blocking surface 232B contacts the stopper 212, the second front-to-back movable member 230B is prevented from further backward movement. For example, the first front-to-back movable member 230A and the second front-to-back movable member 230B may each be provided with a recessed portion at the rear portion of the left and right inner sides thereof, and the recessed portion of the first front-to-back movable member 230A and the recessed portion of the second front-to-back movable member 230B may be combined to form a groove structure that provides access to the stopper 212. The recessed portion of the first front-to-back movable member 230A may provide a first blocking surface 232A, and the recessed portion of the second front-to-back movable member 230B may provide a second blocking surface 232B.

[0079] In order to control the nozzle through the air knife (refer to Figure 12) of the gas injection state, if the air knife cleaning device according to the embodiment of the present invention is configured as shown in the above, the position of the upper lip 10 or the position of the lower lip 20 is adjusted in the front-to-back direction to change the positional relationship between the upper lip 10 and the lower lip 20, the first front-to-back moving member 230A and the first cleaner 240A connected thereto move together with the upper lip 10 in the same direction and the same distance, and the first front cleaning head (refer to 241A, 242A) is adsorbed on the front surface of the upper lip 10 (refer to Figure 1 The state of 11) is maintained, the second front-back moving part 230B and the second cleaning device 240B connected thereto move in the same direction and the same distance with the lower lip 20, and the second front cleaning head (refer to 241B, 242B) is adsorbed on the front side of the lower lip 20 (refer to Figure 1 The state of 21) is maintained.

[0080] Therefore, regardless of the change in the positional relationship between the upper lip 10 and the lower lip 20, the first front cleaning head and the second front cleaning head can be kept in a state of being accurately adsorbed on the front surface of the upper lip 10 and the front surface of the lower lip 20 (see Figure 13 ), in order to clean the knife lip of the air knife, the left and right moving modules (refer to 210, 220) can completely and accurately remove foreign matter from the front of the upper knife lip 10 and the front of the lower knife lip 20 when moving.

[0081] The present invention is not limited to the disclosed embodiments and the accompanying drawings, and a person skilled in the art can make various modifications without departing from the technical concept of the present invention.

Claims

1. An air knife cleaning device comprising: A left-right moving module is provided to be movable in the left-right direction between the upper knife lip and the lower knife lip, wherein the front ends of the upper knife lip and the lower knife lip in the air knife are provided with nozzles of a shape extending in the left-right direction; A driving unit, causing the left and right moving modules to move; A first front-to-back moving component and a second front-to-back moving component are provided on the left and right sides of the left-right moving module so as to be movable in the front-to-back direction respectively; a first washer and a second washer, wherein the first washer is connected to the first front-to-back movable member and is provided with a first front-side cleaning head whose front end contacts the front face of the upper blade lip; and the second washer is connected to the second front-to-back movable member and is provided with a second front-side cleaning head whose front end contacts the front face of the lower blade lip; The first elastic component and the second elastic component respectively move the first front-to-back moving component and the second front-to-back moving component backward along the front-to-back direction through elastic forces, so that the first front cleaning head and the second front cleaning head are respectively adsorbed on the front surface of the upper blade lip and the front surface of the lower blade lip. The first front-to-back moving component and the second front-to-back moving component are respectively provided with a coupling groove on the upper portion. The first washer and the second washer are respectively provided with coupling heads at their rear ends, and the coupling heads are inserted into the coupling grooves of the first front-and-rear moving component and the coupling grooves of the second front-and-rear moving component.

2. The air knife cleaning device according to claim 1, wherein: The first front cleaning head comprises: a first supporting portion protruding upward from the front end of the first cleaning device to face the front surface of the upper blade lip; and a first scraping portion tilted backward from the left side or right side of the first supporting portion to face the front surface of the upper blade lip. The second front cleaning head comprises: a second supporting portion protruding downward from the front end of the second cleaner to be opposite to the front of the lower blade lip; and a second scraping portion tilted backward from the left or right side of the second supporting portion to face the front of the lower blade lip.

3. The air knife cleaning device according to claim 1, wherein: The first cleaning device includes a first inner surface cleaning head, the first inner surface cleaning head being in contact with either the inner upper surface of the upper blade lip or the inner lower surface of the lower blade lip behind the first front cleaning head. The second cleaner has a second inner surface cleaning head, and the second inner surface cleaning head contacts the other of the inner upper surface of the upper blade lip and the inner lower surface of the lower blade lip behind the second front surface cleaning head.

4. The air knife cleaning device according to claim 1, wherein: The left-right moving module has a first front-rear guide and a second front-rear guide, which respectively guide the front-rear movement of the first front-rear moving component and the second front-rear moving component on the left and right outer sides thereof.

5. The air knife cleaning device according to claim 1, wherein: The left-right moving module is provided with a stopper, and the stopper is arranged at the rear between the first front-back moving component and the second front-back moving component. The first front-rear moving member and the second front-rear moving member each have a blocking surface that contacts the stopper according to a rearward moving distance.

6. The air knife cleaning device according to claim 1, wherein: The left and right movable modules are respectively provided with a first supporting surface and a second supporting surface facing backward on the left and right sides of the rear part. The first front-to-back moving component and the second front-to-back moving component respectively have a first bracket opposite to the first supporting surface and a second bracket opposite to the second supporting surface. The first elastic member is interposed between the first supporting surface and the first bracket to impart an elastic force to the first front-rear movable member in the rear direction. The second elastic member is interposed between the second support surface and the second bracket to apply an elastic force to the second front-rear movable member in the rear direction.

7. The air knife cleaning device according to claim 6, wherein: The first bracket and the second bracket have reinforcing protrusions inserted into the inside of the first elastic member and the inside of the second elastic member, respectively.

8. The air knife cleaning device according to claim 1, wherein: The driving unit includes a flexible traction line that pulls and moves the left-right moving module in the left-right direction. The traction line is provided with a fixing block in the middle part. The left and right moving module is provided with a connection portion connected to the middle portion of the pulling line at the front. The connecting portion comprises: an arc-shaped insertion space, wherein the middle portion of the pull line is inserted into the insertion space from above downward, and the left and right ends of the insertion space are respectively open to the front; a guide space extending from the left and right ends of the insertion space to both sides along the left-right direction to guide both side portions connected to both ends of the middle portion of the inserted pull line to the left and right directions; and The fixing space is connected to the middle area of ​​the insertion space and is formed to provide a platform for restricting the movement of the fixing block on the middle part of the inserted pull line by playing a hooking role on the left and right.

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