WO2023243781A1

WO2023243781A1 - Air knife cleaning device

Info

Publication number: WO2023243781A1
Application number: PCT/KR2022/018137
Authority: WO
Inventors: 허기복; 김윤자; 백경철; 허숭; 주덕봉; 정승길
Original assignee: 주식회사 삼우에코
Priority date: 2022-06-14
Filing date: 2022-11-16
Publication date: 2023-12-21
Also published as: CN117230397A; EP4292720A1; KR102423244B1

Abstract

The present invention comprises: a left/right movement module provided between an upper lip and a lower lip, which provide a nozzle in an air knife, so as to be movable in the left/right direction by a driving unit; a first forward/backward movement member and a second forward/backward movement member provided on the left and right on the left/right movement module so as to be movable in the forward/backward direction, and respectively having a first front surface cleaning tip coming in contact with a front surface of the upper lip, and a second front surface cleaning tip coming in contact with a front surface of the lower lip; and a first elastic member and a second elastic member which, by using elastic force, keep the first front surface cleaning tip and the second front surface cleaning tip in the state of close contact with the front surface of the upper lip and the front surface of the lower lip.

Description

Air Knife Cleaning Device

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

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

A pair of air knives is provided at the rear end of the plating bath to face each other at regular intervals. The steel sheet is immersed in the molten metal of the plating bath and then passed between a pair of air knives. The pair of air knives sprays gas (e.g., air) at high pressure on the steel sheet to cut the molten metal attached to the surface of the steel sheet. The amount is controlled by a wiping jet generated by the injected high-pressure gas.

As shown in FIG. 1, the air knife has a nozzle 2 disposed at the tip as a passage for spraying gas. The nozzle 2 is provided in a long shape in the left and right directions. The air knife includes a front lip on which a nozzle 2 is formed, and the lip is composed of an upper lip 10 and a lower lip 20 that are combined with each other to provide the nozzle 2. The upper lip 10 and lower lip 20 are provided with

front faces

11 and 21, respectively, forming the tip of the nozzle 2. The upper lip 10 has an inner upper surface 12 that forms the upper part of the nozzle 2, and the lower lip 20 has an inner lower surface 22 that forms the lower part of the nozzle 2.

According to the wiping jet, scattering of molten metal may occur, and the flying molten metal may adhere to the lip (particularly, the nozzle) of the air knife. The air knife cleaning device can remove foreign substances such as molten metal (for example, zinc chips) attached to the nozzle side from the lip in order to maintain uniform gas injection pressure of the air knife. As shown in Figure 2, the air knife cleaning device includes a cleaner 40 disposed between an upper lip 10 and a lower lip 20. The cleaner 40 is configured to have a plate-shaped structure and is provided with a plurality of cleaning tips. That is, the cleaner 40 is an upper cleaning tip 41 that contacts the front 11 of the upper lip 10 and the front 21 of the lower lip 20, respectively, to remove various foreign substances from the tip of the nozzle 2. and a lower cleaning tip (42).

However, such an air knife cleaning device adjusts the position of the upper lip 10 or the lower lip 20 in the forward and backward directions in order to control the state of gas injection from the air knife to control the upper lip 10 and the lower lip. By changing the positional relationship of (20), the upper cleaning tip 41 is spaced apart (see gap G1) from the front surface 11 of the upper lip 10 as illustrated in (a) of FIG. 2 or the lower cleaning tip 42 ) is spaced apart (see gap G2) from the front 21 of the lower lip 20 as illustrated in (b) of FIG. 2, so there is a problem that foreign matter attached to the tip of the nozzle 2 cannot be accurately removed. there is.

In addition, the upper cleaning tip 41 and the lower cleaning tip 42 may be worn or deformed due to long-term use, and thus the contact state of the upper cleaning tip 41 with the front surface 11 of the upper lip 10 Alternatively, the contact state of the lower cleaning tip 42 with the front surface 21 of the lower lip 20 may become poor or may be released, thereby reducing the foreign matter removal efficiency.

In relation to this, Republic of Korea's Published Patent Publication No. 10-1998-0047222 (September 15, 1998), Korean Patent Publication No. 10-2003-0093586 (December 11, 2003), and Korean Patent Publication No. 10-2006-0055923 (May 2006). 24), Published Patent Publication No. 10-2010-0051365 (2010.05.17), Registered Patent Publication No. 10-1001707 (2010.12.15), Published Patent Publication No. 10-2012-0074642 (2012.07.06), published Patent Publication No. 10-2017-0006956 (2017.01.18) and Patent Publication No. 10-2017-0029719 (2017.03.16) may be referred to.

An embodiment of the present invention is an air knife that can maintain the cleaning tips in exact contact with the front of the upper lip and the front of the lower lip, respectively, regardless of changes in the positional relationship between the upper and lower lips and wear or deformation of the cleaning tips. We would like to provide a cleaning device.

The problem to be solved is not limited to this, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention, a left and right moving module is provided to be movable in the left and right directions between an upper lip and a lower lip that provide a nozzle in a shape extending in the left and right directions at the tip of the air knife; a driving unit that moves the left and right movement modules; a first forward and backward moving member and a second forward and backward moving member provided on the left and right sides of the left and right moving module to be movable in the forward and backward direction, respectively; A first cleaner connected to the first forward and backward moving member and provided with a first front cleaning tip in contact with the front surface of the upper lip at a front end exposed through the nozzle to be positioned in front of the nozzle, and the second forward and backward moving member. a second cleaner connected to the nozzle and having a second front cleaning tip in contact with the front surface of the lower lip at a front end exposed through the nozzle to be located in front of the nozzle; The first forward and backward moving member and the second forward and backward moving member are each moved backward along the forward and backward direction by elastic force to move the first front cleaning tip and the second front cleaning tip respectively to the front side and the upper lip of the upper lip. An air knife cleaning device may be provided, including a first elastic member and a second elastic member that come into close contact with the front surface of the lower lip.

The first front cleaning tip includes a first support portion provided to face the front surface of the upper lip at the front end of the first cleaner; It may have a first scraping portion inclined rearward from the left or right side of the first support portion toward the front of the upper lip. The second front cleaning tip includes a second support portion provided to face the front surface of the lower lip at the front end of the second cleaner; It may have a second scraping portion inclined rearward from the left or right side of the second support portion toward the front of the lower lip.

The first cleaner may have a first inner cleaning tip that contacts one of the inner upper surface of the upper lip and the inner lower surface of the lower lip at the rear of the first front cleaning tip. The second cleaner may have a second inner surface cleaning tip that contacts the other of the inner upper surface of the upper lip and the inner lower surface of the lower lip at the rear of the second front cleaning tip.

The left and right movement module includes a first forward and backward guide that induces forward and backward movement of the first forward and backward movement member and forward and backward movement of the second forward and backward movement member on the left and right outer sides of the first forward and backward movement member and the second forward and backward movement member, respectively; You can have a second before and after guide.

The left and right moving module may include a stopper disposed rearward between the first forward and backward moving member and the second forward and backward moving member. The first forward and backward moving member and the second forward and backward moving member may each have a stop surface that contacts the stopper according to a rearward movement distance.

The first forward and backward movable member and the second forward and backward movable member may each have a coupling groove provided at their upper portions. The first cleaner and the second cleaner may be provided at rear ends with a coupling tip that fits into the coupling groove of the first forward and backward movable member and the coupling groove of the second forward and backward movable member, respectively.

The left and right moving module may be provided with a first support surface and a second support surface facing rear, respectively, on the left and right sides of the rear portion. The first back-and-forth movement member and the second back-and-forth movement member may each have a first support facing the first support surface and a second support facing the second support surface. The first elastic member may be interposed between the first support surface and the first support to apply elastic force backward to the first forward and backward moving member. The second elastic member may be interposed between the second support surface and the second support to apply elastic force backward to the second forward and backward moving member.

The first support and the second support may have reinforcing protrusions inserted into the interior of the first elastic member and the interior of the second elastic member, respectively.

The driving unit may include a flexible traction line that pulls and moves the left/right movement module in the left/right direction. The towing line may be provided with a fixing block in the middle portion. The left and right movement module may be provided with a joint portion connected to the middle portion of the traction line at the front. The joint portion includes an arc-shaped insertion space in which the middle portion of the traction line is inserted from top to bottom and both left and right ends are open forward, respectively; a guiding space that extends from the left and right ends of the insertion space to both sides along the left and right directions and guides both parts connected to both ends of the middle portion of the inserted traction line in the left and right directions, respectively; It may be provided with a fixing space that communicates with the middle area of the insertion space and is formed to provide a jaw that restricts movement by a locking action on the left and right with respect to the fixing block on the middle portion of the inserted traction line.

According to an embodiment of the present invention, when the positional relationship between the upper lip and the lower lip is changed by adjusting the position of the upper lip or the lower lip in the front-back direction, the upper lip cleaner is moved together with the upper lip to remove the upper lip cleaner. 1 Because the front cleaning tip is maintained in close contact with the front surface of the upper lip, and the lower lip cleaner is moved together with the lower lip, the second front cleaning tip of the lower lip cleaner is maintained in close contact with the front surface of the lower lip, The first front cleaning tip and the second front cleaning tip can be maintained in exact contact with the front surface of the upper lip and the front surface of the lower lip regardless of changes in the positional relationship between the upper lip and lower lip, and can clean the lip of the air knife. When moving the left and right moving module to do this, you can be sure to remove all foreign matter from the front of the upper lip and the front of the lower lip.

Therefore, the embodiment of the present invention can prevent deterioration of product quality by maintaining uniform gas injection pressure through the nozzle of the air knife.

Figure 1 is a cross-sectional view of the lip of a typical air knife seen from the right.

Figures 2 (a) and (b) are cross-sectional views viewed from the right showing the air knife cleaning device according to the prior art applied to the lip of an air knife, and these drawings show problems with the prior art.

Figures 3 and 4 are a plan view and a right side view, respectively, showing an air knife to which an air knife cleaning device according to an embodiment of the present invention is applied.

Figure 5 is a cross-sectional view of portion A of Figure 4.

6 to 8 are a perspective view, a top view, and a rear view, respectively, showing the lip cleaner assembly of the air knife cleaning device according to an embodiment of the present invention.

Figure 9 is a cross-sectional view taken along line B-B of Figure 7.

Figure 10 is a cross-sectional view taken along line C-C of Figure 9.

Figures 11 (a) and (b) are perspective views of the left and right movement modules shown in Figures 6 and 7, as seen from different directions.

FIG. 12 is a perspective view showing the upper and lower lip cleaners and the first and second elastic members shown in FIGS. 6 to 8, etc.;

Figures 13 (a) and (b) are cross-sectional views illustrating the operation of the air knife cleaning device according to an embodiment of the present invention based on Figure 5.

[Explanation of symbols]

2: nozzle of air knife, 10: upper lip of air knife, 11: front of upper lip, 12: inner upper surface of upper lip, 20: lower lip of air knife, 21: front of lower lip, 22: front of lower lip Internal lower surface, 100: drive unit, 200: lip cleaner assembly, 210: base block, 220: moving wheel, 230A: first forward and backward moving member, 230B: second forward and backward moving member, 240A: first cleaner, 240B: second cleaner. , 250A: first elastic member, 250B: second elastic member

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

An air knife cleaning device according to an embodiment of the present invention can be used to clean an air knife that controls the amount of molten metal attached to the surface of a steel sheet in a hot dip plating process. The configuration and operation of an air knife cleaning device according to an embodiment of the present invention are shown in FIGS. 3 to 13.

Referring to Figures 3 and 4, the air knife cleaning device according to an embodiment of the present invention is operated in a left-right direction (refer to the ) includes a lip cleaner assembly 200 that cleans the lip while moving along the lip cleaner assembly 200, and a drive unit 100 for moving the lip cleaner assembly 200 in the left and right directions. As explained above with reference to FIG. 1, the air knife has a nozzle (see 2 in FIG. 1) provided long in the left and right directions at the tip as a passage for spraying gas such as air, and has an upper lip 10 and a lower lip. (20) are configured to be combined with each other to provide a nozzle. Accordingly, the upper lip 10 and the lower lip 20 each have front faces (see 11 and 21 in FIG. 1) that form the tip of the nozzle. Additionally, the upper lip 10 has an inner upper surface (see 12 in FIG. 1) that forms the upper part of the nozzle, and the lower lip 20 has an inner lower surface (see 22 in FIG. 1) that forms the lower part of the nozzle.

Referring to FIGS. 5 and 6, the lip cleaner assembly 200 includes a left and right moving module (see 210 and 220), an upper lip cleaner (see 230A and 240A) and a lower lip cleaner (see 230B and 240B), and a first elastic unit. It includes a member 250A and a second elastic member 250B. The left and right moving module can be moved in the left and right direction between the upper lip 10 and the lower lip 20 by the driving unit 100. When the left and right moving module is moved, the upper lip cleaner and the lower lip cleaner are moved in the left and right directions together with the left and right moving module. The upper lip cleaner and the lower lip cleaner can be moved in the forward and backward direction (see Y direction) on the left and right movement modules, respectively. The upper lip cleaner has a first front cleaning tip (see 241A, 242A), and the lower lip cleaner has a second front cleaning tip (see 241B, 242B). The first front cleaning tip may contact the front surface of the upper lip 10 (see 11 in FIG. 1), and the second front cleaning tip may contact the front surface of the lower lip 20 (see 21 in FIG. 1). there is. When the left and right moving module is moved, the first front cleaning tip and the second front cleaning tip remove foreign substances such as zinc chips from the front of the upper lip 10 and the front of the lower lip 20 by scraping, respectively. It can be removed. The first elastic member 250A and the second elastic member 250B elastically apply the first front cleaning tip and the second front cleaning tip to the front of the upper lip 10 and the front of the lower lip 20, respectively, using elastic force. It can be adhered closely.

Referring to FIGS. 6, 7, 10, and 11, the left and right movement module includes a base block 210 and one or more moving wheels 220 that provide mobility to the base block 210. Referring to FIG. 5, the lower lip 20 may be provided with a module guide (see 23, 24) that guides the left and right movement of the left and right moving module along the left and right direction at the rear of the nozzle (see 2 in FIG. 1). there is. The moving wheel 220 may be a bearing, roller, wheel, etc. Two moving wheels 220 are provided on both left and right sides of the base block 210 to be rotatable about an axis in the up and down direction (see Z direction), and have a diameter larger than the front-to-back size of the base block 210, It may be arranged to protrude forward and backward from the base block 210. The module guide may be provided with module receiving grooves 23 and guide grooves 24. The module receiving groove 23 can accommodate the base block 210. The module receiving groove 23 may be a groove that extends in the left and right directions, has an open upper part, and communicates with the space between the upper lip 10 and the lower lip 20. The guide grooves 24 may be formed long along the left and right directions on the walls on both the front and rear sides of the module receiving groove 23, and the moving wheel 220 is inserted into the guide grooves 24 on both left and right sides and has a circumferential guide. By contacting the grooves 24, a rolling motion can be performed along the guide grooves 24.

Referring to FIGS. 3 and 4, the driving unit 100 includes a driving source 110 that provides driving force, and an electric mechanism that transmits the driving force of the driving source 110 to the left and

right movement modules

210 and 220 in the left and right directions. Includes (120). The drive unit 100 is configured such that the electric mechanism 120 includes a flexible traction line 121 and pulls and moves the left and right movement module in the left and right directions by the traction line 121. The drive source 110 may be an actuator provided on the air knife main body 30 and having a moving body 112 that reciprocates. The traction line 121 has its middle portion 122 connected to the base block 210 (see FIG. 10), and both end portions may be connected to the mobile body 112, and the electric mechanism 120 is connected to the mobile body 112. When moved, the traction line 121 is positioned between the middle portion 122 and both ends of the traction line 121 so that the base block 210 can be pulled to the left or right according to the moving direction of the movable body 112. ) and may further include line guides 125 that guide between the base block 210. For example, the towing line 121 may be a rope or wire, and the line guides 125 may be rollers.

As shown in FIG. 10, 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 connected to the middle portion 122 of the traction line 121. Connected joint parts (214, 215, 216, see FIG. 11) are provided at the front. The traction line 121 is connected to the line guides 125 so that both parts 123 connected to both ends of the middle part 122 have straight sections extending to both sides in the left and right directions with respect to the base block 210. Guided by can be advantageous in terms of improving transmission efficiency.

Referring to FIGS. 6, 10, and 11 (particularly, (a)), the joint portion is configured to have an insertion space 214, an induction space 215, and a fixing space 216.

The middle portion 122 of the traction line 121 is inserted into the insertion space 214 of the joint portion. In addition, the insertion space 214 is formed in a shape with an open top so that the middle portion 122 of the traction line 121 can be inserted from above to below. In addition, the insertion space 214 is formed in an arc shape with both left and right ends open forward, and the traction line 121 has a middle portion 122 bent into an arc shape corresponding to the insertion space 214. It is inserted into the insertion space 214 in the form, and both parts 123 connected to both ends of the middle part 122 can be pulled out from the insertion space 214 through both left and right ends of the insertion space 214. According to this, the traction line 121 with the middle portion 122 inserted into the insertion space 214 can be maintained in a state in which it is difficult to deviate from its position upward from the insertion space 214.

The guidance space 215 is in communication with the insertion space 214 and extends from both left and right ends of the insertion space 214 to both sides in the left and right directions, respectively, so that the guidance space 215 extends to both sides of the traction line 121 drawn out from the insertion space 214. The portion 123, unlike the middle portion 122 of the traction line 121 bent in an arc shape, can be guided to spread straight on both sides along the left and right directions, respectively. For reference, the guidance space 215 may be placed below the moving wheel 220 to prevent interference between the moving wheel 220 and both parts 123 of the traction line 121 guided in the left and right directions. there is.

The traction line 121 has a fixing block 124. The fixing block 124 is provided on the middle portion 122 of the traction line 121 to enlarge the thickness of a portion of the middle portion 122 and is inserted with the middle portion 122 of the traction line 121. It is inserted into space 214. The fixing space 216 communicates with the middle area of the insertion space 214. The fixing space 216 has a jaw 217 that restricts movement by engaging on both left and right sides with respect to the fixing block 124 inserted into the insertion space 214 together with the middle portion 122 of the traction line 121. formed to provide According to the locking action of the jaw 217 provided by the fixing space 216, the traction line 121 with the middle portion 122 inserted into the insertion space 214 is restricted or restricted from moving left and right in the insertion space 214. do. Accordingly, the traction line 121 can pull the left and right moving modules (see 210 and 220) in the left and right directions.

As shown in FIGS. 6, 7, 12, etc., the upper lip cleaner includes a first forward and backward moving member 230A and a first cleaner 240A of a plate-shaped structure, and the lower lip cleaner includes a second forward and backward moving member ( 230B) and a second cleaner 240B of a plate-shaped structure.

The first forward and backward moving member 230A and the second forward and backward moving member 230B are provided on the upper part of the base block 210 to be movable in the forward and backward directions, respectively, and are arranged left and right so as to be adjacent to each other. Referring to FIGS. 8, 11, etc., the first forward and backward moving member 230A can be accurately moved forward and backward by the first forward and backward guide 211A, and the second forward and backward moving member 230B is the second forward and backward guide 211B. ) can be accurately moved back and forth. The first front and rear guide 211A and the second front and rear guide 211B are provided in the base module 210. The first forward and backward guide 211A and the second forward and backward guide 211B are arranged to be located on the left and right outside of the first forward and backward moving member 230A and the second forward and backward moving member 230B, respectively, and the first forward and backward moving member ( It induces the forward and backward movement of 230A) and the forward and backward movement of the second forward and backward movement member 230B. For example, the first front-back guide 211A and the second front-back guide 211B may be provided in a long groove shape in the front-back direction. In addition, the first forward and backward movable member 230A and the second forward and backward movable member 230B each have a protruding portion and a second protrusion that can slide along the first forward and backward guide 211A while being inserted into the first forward and backward guide 211A. It may have a protruding portion that can slide along the second front and rear guide (211B) while being inserted into the front and rear guide (211B).

The first cleaner 240A has a first rear end connected to the first forward and backward moving member 230A and a first front end exposed through the nozzle of the air knife (see 2 in FIG. 1). The first cleaner 240A passes through the nozzle and its first front end is located at the front end of the nozzle. The second cleaner 240B has a second rear end connected to the second back and forth moving member 230B and a second front end exposed through the nozzle. The second cleaner 240B passes through the nozzle and its second front end is located at the front end of the nozzle.

Referring to FIGS. 6, 12, etc., the first cleaner 240A and the second cleaner 240B have the above-mentioned first front cleaning tip and second front cleaning tip at the first front end and the second front end, respectively. It is prepared. The first front cleaning tip has a first support portion 241A that protrudes upward from the first front end of the first cleaner 240A to face the front surface of the upper lip 10 (see 11 in FIG. 1), , and is provided with a first scraping portion 242A that is inclined rearward from the left or right side of the first support portion 241A toward the front of the upper lip 10 and contacts the front of the upper lip 10. The second front cleaning tip has a second support portion 241B that protrudes downward from the second front end of the second cleaner 240B to face the front surface of the lower lip 20 (see 21 in FIG. 1). , and is provided with a second scraping portion 242B that is inclined rearward from the left or right side of the second support portion 241B toward the front of the lower lip 20 and contacts the front of the lower lip 20. The first front cleaning tip and the second front cleaning tip are processed to bend the front part of the first cleaner 240A upward and backward, and to bend the front part of the second cleaner 240B downward and backward, respectively. It can be provided through . For example, the first cleaner 240A and the second cleaner 240B may be made of metal. Each of the first scraping portion 242A and the second scraping portion 242B has a proximal portion of the proximal end portion (corresponding to the fixed end) and the tip portion (corresponding to the free end) having a first support portion (241A). ) and the second support portion 241B, and because the first cleaner 240A and the second cleaner 240B may have elasticity due to their plate-shaped structure, the first support portion 241A and the second support portion 241B The portion 241B may be slightly bent forward and the degree of backward tilt may be alleviated and then restored to its original state. According to this, the contact state of the first scraping portion 242A with the front surface of the upper lip 10 and the contact state of the second scraping portion 242B with the front surface of the lower lip 20 are better. can be maintained.

6, 7 and 12, the first cleaner 240A contacts the inner upper surface of the upper lip 10 (see 12 in FIG. 1) at the rear of the first front cleaning tip (see 241A and 242A). With the first inner surface cleaning tip 243A, the second cleaner 240B contacts the inner surface of the lower lip 20 (see 22 in FIG. 1) at the rear of the second

front cleaning tip

241B and 242B. It has a second inner cleaning tip 243B. Accordingly, when the left and right moving modules (see 210 and 220) are moved, the first inner surface cleaning tip 243A and the second inner surface cleaning tip 243B are respectively scraped to the inner upper surface and lower lip of the upper lip 10. Foreign substances such as zinc chips can be removed from the inner lower surface of the. The first inner cleaning tip 243A may be provided by bending the left or right side of the portion immediately after the first front cleaning tip upward in the first cleaner 240A, and the second inner cleaning tip 243B may be It may be provided by bending the left or right side of the portion immediately after the second front cleaning tip of the second cleaner 240B downward. Depending on implementation conditions, etc., the first inner surface cleaning tip 243A may be provided in the second cleaner 240B rather than the first cleaner 240A, and the second inner surface cleaning tip 243B may be provided in the second cleaner 240B. It may also be provided in the first cleaner 240A instead of .

Referring to Figure 7 and Figure 11 (b), the first forward and backward moving member 230A is provided with a first coupling groove 234A at the top, and the first cleaner 240A is provided in the first coupling groove 234A. A first engaging tip 244A to be fitted is provided at the first rear end. The second forward and backward moving member 230B has a second coupling groove 234B at the top, and the second cleaner 240B has a second coupling tip 244B fitted into the second coupling groove 234B. It is provided at the end. The first coupling groove 234A and the second coupling groove 234B may be formed to be concave downward, and the first coupling tip 244A and the second coupling tip 244B are each of the first coupling groove 240A. 1 may protrude downward from the rear end and the second rear end of the second cleaner 240B. The first coupling tip 244A and the second coupling tip 244B may be provided by bending the rear portion of the first cleaner 240A and the rear portion of the second cleaner 240B downward, respectively. The first cleaner 240A and the second cleaner 240B are each positioned with the first coupling tip 244A inserted into the first coupling groove 234A and the second coupling tip 244B positioned in the second coupling groove ( 234B), the position may be fixed by being fastened to the first forward and backward moving member 230A and the second forward and backward moving member 230B by a fastening element such as a screw.

The first elastic member 250A applies elastic force to the first forward and backward moving member (see 11 in FIG. 1) in order to elastically adhere the first front cleaning tip (see 241A, 242A) to the front of the upper lip 10 (see 11 in FIG. 1). 230A) is provided rearward along the front-back direction to move the first front-back movement member 230A rearward. The second elastic member 250B applies elastic force to the second front/backward moving member (see 21) in order to elastically adhere the second front cleaning tip (see 241B, 242B) to the front of the lower lip 20 (see 21 in FIG. 1). 230B) is provided rearward along the front-back direction to move the second front-back moving member 230B rearward.

Referring to FIGS. 9 and 10 , the base block 210 is provided with a first support surface 213A and a second support surface 213B facing rear on the left and right sides of the rear portion, respectively. The base block 210 is provided with a first insertion groove in which the first elastic member 250A is accommodated and a second insertion groove in which the second elastic member 250B is accommodated on the left and right sides of the rear portion, respectively. The first insertion groove and the second insertion groove are formed in a shape with an open rear portion. The front portion of the first insertion groove provides a first support surface 213A, and the front portion of the second insertion groove provides a second support surface 213B. Referring to FIGS. 8, 10, 11(b), and 12, the first forward and backward moving member 230A and the second forward and backward moving member 230B each have a first forward and backward moving member 230B facing the first support surface 213A. It has a second support (236B) facing the support (236A) and the second support surface (213B). The first support 236A may be provided at the rear portion of the first forward and backward movable member 230A, and the second support 236B may be provided at the rear portion of the second forward and backward movable member 230B.

As shown in FIG. 10, the first elastic member 250A and the second elastic member 250B are between the first support surface 213A and the first support 236A and between the second support surface 213B and the second support surface 213A, respectively. 2 It is interposed in a compressed state between the supports 236B to apply elastic force backwards to the first forward and backward moving member 230A and the second forward and backward moving member 230B. The first elastic member 250A is inserted into the first insertion groove providing the first support surface 213A, and both end portions are supported by the first support surface 213A and the first support 236A, respectively, The second elastic member 250B is inserted into the second insertion groove providing the second support surface 213B, and both end portions are supported by the second support surface 213B and the second support 236B, respectively.

As shown in FIGS. 10 and 12, the first support 236A is inserted in the front-back direction into the interior of the first elastic member 250A interposed between the first support surface 213A and the first elastic member 213A. (250A) has a first reinforcing protrusion (237A) that prevents the position of the upper lip cleaner (230A, 240A) from being separated during the back and forth movement, and the second support (236B) has a second support surface (213B) and An agent that is inserted in the front-back direction into the second elastic member 250B interposed between the second elastic members 250B to prevent the position of the second elastic member 250B from being deviated during the back-and-forth movement of the

lower lip cleaners

230B and 240B. It has 2 reinforcement protrusions (237B). For 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 inner space of the coil spring, respectively. You can. As another example, the first elastic member 250A and the second elastic member 250B are blocks each containing an elastic material such as rubber, and the first reinforcing protrusion 237A and the second reinforcing protrusion 237B are positioned at the front and rear, respectively. It may be formed to have a groove inserted in one direction.

Referring to Figures 8, 10, and 11 (b), the base block 210 includes a stopper 212 disposed rearward between the first forward and backward moving member 230A and the second forward and backward moving member 230B. Provided with, the first forward and backward moving member 230A and the second forward and backward moving member 230B each have a first stop surface 232A and a second stop surface 232B that contact the stopper 212 when moved backward a certain distance. ) has. The stopper 212 is provided in a shape that protrudes upward. When the first forward and backward moving member 230A is moved backward a certain distance and the first stop surface 232A contacts the stopper 212, the first forward and backward moving member 230A is prevented from further backward movement. When the second forward and backward moving member 230B is moved backward a certain distance and the second stop surface 232B contacts the stopper 212, the second forward and backward moving member 230B is prevented from further moving backward. For example, the first forward and backward movable member 230A and the second forward and backward movable member 230B may each be provided with concave portions at the rear portions on the left and right inner sides, and the concave portions of the first forward and backward movable member 230A and the second forward and backward movable member 230B may be provided respectively. The concave portions of the two forward and backward moving members 230B may be combined with each other to provide a groove structure into which the stopper 212 can enter. The concave portion of the first forward and backward moving member 230A may provide a first stop surface 232A, and the concave portion of the second forward and backward moving member 230B may provide a second stop surface 232B.

The air knife cleaning device according to the embodiment of the present invention, configured as described above, controls the position of the upper lip 10 or the lower lip 20 to control the gas injection state through the nozzle of the air knife (see 2 in FIG. 1). ) by adjusting the position in the front-back direction to change the positional relationship between the upper lip 10 and the lower lip 20, the first forward-backward moving member 230A and the first cleaner 240A connected thereto move to the upper lip 10. is moved in the same direction and at the same distance so that the first front cleaning tip (see 241A, 242A) is maintained in close contact with the front surface of the upper lip 10 (see 11 in FIG. 1), and the second forward and backward moving member ( 230B) and the second cleaner 240B connected thereto are moved in the same direction and at the same distance together with the lower lip 20 so that the second

front cleaning tips

241B and 242B are moved to the front of the lower lip 20 (see FIG. 1). 21) and remains in close contact with it.

Therefore, the first front cleaning tip and the second front cleaning tip are accurately adhered to the front of the upper lip 10 and the front of the lower lip 20 regardless of the change in the positional relationship between the upper lip 10 and the lower lip 20. (see FIG. 13), and when moving the left and right moving modules (see 210, 220) to clean the lip of the air knife, it can be moved from the front of the upper lip (10) and the front of the lower lip (20). It can be reliably removed without leaving any foreign matter behind.

The present invention is not limited to the disclosed embodiments and the accompanying drawings, and may be modified in various ways by those skilled in the art without departing from the technical spirit of the present invention.

Claims

A left and right moving module provided to be movable in the left and right directions between the upper lip and the lower lip that provides a nozzle extending in the left and right directions at the tip of the air knife;

a driving unit that moves the left and right movement modules;

a first forward and backward moving member and a second forward and backward moving member provided on the left and right sides of the left and right moving module to be movable in the forward and backward direction, respectively;

a first cleaner provided with a first front cleaning tip connected to the first back-and-forth movable member and in contact with the front face of the upper lip at its front end; and a first cleaner connected to the second back-and-forth movable member and contacting the front face of the lower lip at its front end. a second cleaner provided with a second front cleaning tip;

The first forward and backward moving member and the second forward and backward moving member are each moved backward along the forward and backward direction by elastic force to move the first front cleaning tip and the second front cleaning tip respectively to the front side and the upper lip of the upper lip. Comprising a first elastic member and a second elastic member in close contact with the front surface of the lower lip,

Air knife cleaning device.
In claim 1,

The first front cleaning tip includes: a first support portion protruding upward to face the front surface of the upper lip at the front end of the first cleaner; a first scraping portion inclined rearwardly toward the front of the upper lip on the left or right side of the first support portion;

The second front cleaning tip includes a second support portion protruding downward from the front end of the second cleaner to face the front surface of the lower lip; and a second scraping portion inclined rearwardly toward the front of the lower lip on the left or right side of the second support portion.

Air knife cleaning device.
In claim 1,

The first cleaner has a first inner cleaning tip that contacts one of the inner upper surface of the upper lip and the inner lower surface of the lower lip at the rear of the first front cleaning tip,

The second cleaner has a second inner surface cleaning tip that contacts the other of the inner upper surface of the upper lip and the inner lower surface of the lower lip at the rear of the second front cleaning tip.

Air knife cleaning device.
In claim 1,

The left and right movement module includes a first forward and backward guide that induces forward and backward movement of the first forward and backward movement member and forward and backward movement of the second forward and backward movement member on the left and right outer sides of the first forward and backward movement member and the second forward and backward movement member, respectively; With the second post-war guide,

Air knife cleaning device.
In claim 1,

The left and right moving module has a stopper disposed rearward between the first forward and backward moving member and the second forward and backward moving member,

The first forward and backward moving member and the second forward and backward moving member each have a stop surface that contacts the stopper according to the rearward moving distance,

Air knife cleaning device.
In claim 1,

The first forward and backward moving member and the second forward and backward moving member each have a coupling groove provided at their upper portion,

The first cleaner and the second cleaner each have a coupling tip that fits into the coupling groove of the first forward and backward movable member and the coupling groove of the second forward and backward movable member, and is provided at a rear end, respectively.

Air knife cleaning device.
In claim 1,

The left and right moving module is provided with a first support surface and a second support surface facing rear, respectively, on the left and right sides of the rear portion,

The first back-and-forth movement member and the second back-and-forth movement member each have a first support facing the first support surface and a second support facing the second support surface,

The first elastic member is interposed between the first support surface and the first support to impart elastic force backward to the first forward and backward moving member,

The second elastic member is interposed between the second support surface and the second support to impart elastic force backward to the second forward and backward moving member.

Air knife cleaning device.
In claim 7,

The first support and the second support have reinforcing protrusions inserted into the interior of the first elastic member and the interior of the second elastic member, respectively.

Air knife cleaning device.
In claim 1,

The driving unit includes a flexible traction line that pulls and moves the left and right moving module in the left and right directions,

The towing line is provided with a fixing block in the middle part,

The left and right movement module has a joint portion connected to the middle portion of the traction line at the front,

The joint part,

an arc-shaped insertion space in which the middle portion of the traction line is inserted from top to bottom and both left and right ends are open forward, respectively;

a guiding space that extends from the left and right ends of the insertion space to both sides along the left and right directions and guides both parts connected to both ends of the middle portion of the inserted traction line in the left and right directions, respectively;

a fixation space communicating with the middle region of the insertion space and formed to provide a jaw that restricts movement by engaging action from left and right with respect to the fixation block on the middle portion of the inserted traction line,

Air knife cleaning device.