KR101602851B1 - Apparatus for cleaning roller and looper utility having the same - Google Patents

Abstract

According to an embodiment of the present invention, there is provided a roller cleaning apparatus comprising: a cleaning member which is movable toward a roller in association with a separate frame, and which is capable of removing foreign matter adhering to the roller in contact with the roller; And a jet member installed at one side of the cleaning member and capable of jetting fluid toward the roller.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roller cleaning apparatus and a looper apparatus including the roller cleaning apparatus.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller cleaning apparatus and a looper apparatus having the roller cleaning apparatus. More particularly, the present invention relates to a roller cleaning apparatus and a looper apparatus including the roller cleaning apparatus. More particularly, And a looper apparatus having the roller cleaning apparatus.

Generally, in the continuous annealing line during steel cold rolling process, the speed of the steel sheet discharged from the subsequent process is slower than the speed of the steel sheet discharged from the previous process, so a horizontal louver is installed between each process. For example, the cold-rolled steel sheet flows into the annealing furnace through the inlet side looper, and through the annealing furnace, the stress generated during rolling is removed. The cold rolled steel sheet is cooled through the cooler, drawn through the exit looper, and then wound on a tension reel.

However, when various pollutants such as dust, dust, etc. are adhered to (adhered to) the surface of the rollers while passing through a plurality of rollers installed on the inlet louver in the annealing process, Thereby causing defects on the surface of the steel sheet passing through the furnace.

Particularly, in the case of a stainless steel plate which is required to maintain a high gloss, when foreign matters are deposited on the steel sheet, foreign matter is burned when passing through the annealing furnace, thereby causing stains or marks on the surface of the steel sheet. Meanwhile, in recent years, a worker periodically removes foreign matter on the roll surface manually after stopping the equipment in operation. However, the foreign matter removal efficiency of the rollers is not only determined according to the skill of the operator, but also has an inefficient problem.

Korean Patent Publication No. 10-2003-0012541. 02. 12.

It is an object of the present invention to provide an apparatus for removing foreign matter adhered to a roller for supporting and transporting a steel sheet in a looper facility.

Another object of the present invention is to keep the roller surface clean to prevent surface defects of the steel sheet.

Other objects of the present invention will become more apparent from the following detailed description and drawings.

According to an embodiment of the present invention, there is provided a roller cleaning apparatus comprising: a cleaning member which is movable toward a roller in association with a separate frame, and which is capable of removing foreign matter adhering to the roller in contact with the roller; And a jet member installed at one side of the cleaning member and capable of jetting fluid toward the roller.

The cleaning member may be installed on one side of the roller that rotates in one direction and may be connected to a main frame supporting the roller.

Wherein the injection member includes: a ball cover housing having an inner hollow injection hole for injecting the fluid; And a ball protruding from the injection hole toward the roller to be in contact with the roller and rotatable, and the fluid may be injected into the roller through a space formed between the ball and the sidewall of the injection hole.

Wherein the cleaning member comprises front and rear polishing pads spaced from each other along the circumferential direction of the roller with respect to the rotational direction of the roller; And a doctor blade installed at one side of the front and rear polishing pads, and the jet member may be disposed between the front and rear polishing pads.

The roller cleaning apparatus further includes a lower space connected to the main frame for accommodating one end of the roller, the cleaning member and the injection member, and a lower hole communicating with the injection hole on the bottom surface, A housing; And a moving plate connected to the lower portion of the jetting member in parallel with the longitudinal direction of the roller and having an upper hole at a position corresponding to the jetting hole.

The roller cleaning apparatus includes a stretchable and contractible pipe connected to the lower hole and the upper hole so as to communicate with each other; A moving shaft disposed below the moving plate, the moving shaft being inserted into insertion holes formed on both sides of the lower hole, respectively, and being movable; And a transferring member connected to the moving shaft and capable of converting the cleaning member into an operating position in contact with the surface of the roller and a standby position in which the cleaning member is detached from the surface of the roller.

The roller cleaning apparatus may further include a support frame installed between the upper surface of the main frame and the bottom surface of the housing to form an internal space for installation. The transfer member is fixed to a lower end of the moving shaft, A touch ring having a large diameter and attached to a magnet; An electromagnet plate disposed at a lower portion of the touch ring and installed in the internal space for providing a magnetic force; And a first elastic member provided between the moving plate and the bottom surface of the housing to provide an elastic force toward the moving plate.

The front and rear polishing pads may be mounted on the moving plate, and the front and rear pad housings may be supported by the moving plate and connected to move toward the center of the roller.

The roller cleaning apparatus includes front and rear ring brackets connected to both sides of the moving plate and supported by the moving plate; A ring shaft which is inserted into the through holes formed in the front and rear ring brackets respectively and is movable and whose upper end is connected to the lower end of the front and rear pad housings respectively; A limiter ring fixed to the lower end of the ring shaft and having a larger diameter than the through-hole; And second elastic members provided between the front and rear pad housings and the front and rear ring brackets respectively to provide an elastic force toward the front and rear ring brackets.

The roller cleaning apparatus includes an auxiliary ring bracket installed in front of the front ring bracket; A blade housing on which the doctor blade is mounted; An auxiliary ring shaft connected to a lower end of the blade housing, the auxiliary ring shaft being inserted and movable in a secondary through hole formed in the auxiliary ring bracket; An auxiliary limiter ring fixed to a lower end of the auxiliary ring shaft and having a larger diameter than the auxiliary through-hole; And a third elastic member provided between the blade housing and the auxiliary ring bracket to provide an elastic force toward the blade housing.

Wherein the plurality of injection members are provided along the longitudinal direction of the moving plate, the roller cleaning device is branched and connected to the lower holes respectively formed in the housing, and supplies the fluid to the lower holes; A valve connected to the supply pipe and capable of opening and closing the supply pipe; And a controller connected to the electromagnet plate and the valve to open the valve when the current of the electromagnet plate is cut off.

The housing has a fluid discharge hole formed at one side of the lower hole, and the roller cleaning device is disposed at one side of the main frame arranged in the vertical direction, and each main frame is connected to be rotatable in the horizontal direction Vertical frame; And a return pipe communicating with the fluid discharge hole and capable of discharging the fluid and foreign matter contained in the accommodation space to the outside.

Wherein the supply pipe includes: a main supply pipe fixedly installed in parallel with the vertical frame; An auxiliary supply pipe branched to communicate with the lower holes and supported by the main frame; And an expansion / contraction supply pipe connected between the auxiliary supply pipe and the main supply pipe, wherein the return pipe includes a main return pipe fixedly installed in parallel with the main supply pipe; An auxiliary return pipe connected to the fluid discharge hole and supported by the main frame; And an elastic return pipe connected between the auxiliary return pipe and the main return pipe and expandable and contractible.

According to an embodiment of the present invention, there is provided a roller cleaning apparatus as described in any one of claims 1 to 13, wherein continuous processes can be performed without decelerating and stopping the equipment while the leading steel sheet and the trailing steel sheet are welded A plurality of steering rollers mounted on the frame to change a traveling direction of the steel plate; A plurality of deflector rollers disposed on opposite sides of the steering rollers and mounted to change a traveling direction of the steel sheet; And a plurality of swing arm rollers installed between the steering rollers and the deflector rollers to prevent the steel strip from being sagged downward, wherein the roller cleaning apparatus is installed at a lower portion of the swing arm rollers, Clean the arm roller.

According to an embodiment of the present invention, contaminants adhered to the swing arm roller can be quickly and effectively removed using a jet member and a cleaning member. In addition, the removed pollutants and washing water can be automatically recovered. Therefore, the productivity and quality of the product can be improved, and the safety accident of the worker can be prevented in advance.

1 is a view showing a general cold rolling facility.
2 is a view schematically showing a general horizontal looper.
3 is a view schematically showing a roller cleaning apparatus according to an embodiment of the present invention.
4 is a side view of the roller cleaning apparatus shown in Fig.
5 is a view showing a connection state of the controller.
6 is an enlarged view of A shown in Fig.
7 is an enlarged view of B shown in Fig.
8 is a plan view of the roller cleaning apparatus shown in Fig.
9 is a view showing the moving state of the roller cleaning apparatus shown in Fig.
FIGS. 10 and 11 are views showing the operation of the roller cleaning apparatus shown in FIG.

In order to facilitate understanding of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below will be described on the basis of the embodiments best suited to understand the technical characteristics of the present invention and the technical features of the present invention are not limited by the embodiments described, Illustrate that the present invention may be implemented as embodiments.

Therefore, it is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. In order to facilitate an understanding of the embodiments described below, in the reference numerals shown in the accompanying drawings, among the constituent elements which perform the same function in the respective embodiments, the related constituent elements are indicated by the same or an extension line number.

FIG. 1 is a view showing a general cold rolling facility, and FIG. 2 is a view schematically showing a general horizontal looper. As shown in FIG. 1, the cold rolling facility 300 for performing the continuous cold rolling operation is constructed such that the leading and trailing steel plates S are welded and welded in the welder 210, and the storage amount adjustment of the horizontal looper 200 The steel sheet S is supplied to the rolling mill 220 smoothly. The horizontal looper 200 is a type of steel plate (S) storage device provided in a continuous line of a rolling facility. The horizontal looper 200 stores the steel plate S while horizontally advancing the louper (130 in FIG. 2).

2, the horizontal looper 200 of the general construction includes a horizontal rail 140 for providing a horizontal path of a predetermined length in a straight line, and a louver (not shown) which is moved along the horizontal rail 140 A plurality of steering rolls 110 mounted on a facility frame (not shown) on one side of the horizontal rail 140 so as to change the traveling direction of the steel strip; A plurality of deflector rollers 120 mounted on the pucker 130 and a plurality of swing arm rollers 10 installed between the steering roller 110 and the deflector rollers 120 to support the steel sheet S to prevent sagging ).

The swing arm rollers 10 are paired in a symmetrical structure so as to respectively support the left and right lower portions of the steel sheet S. The swing arm rollers 10 are rotatably supported in the vertical frame 20 Respectively. The swing arm rollers 10 have a structure in which the swivel arm rollers 10 are pivoted about the vertical frame 20 so as not to interfere with the advancement of the lupuskar 130 when the lupuskar 130 moves along the horizontal rail 140. [

However, dust particles due to wear of the surface of the swing arm roll 10 supporting the lower portion of the steel strip S having a long length and contaminants such as dust and dust on the steel strip S, When foreign matter adheres to or adheres to the surface of the steel sheet S, the foreign matter is adhered or transferred directly to the surface of the steel sheet S on which the foreign matter proceeds, and defects such as the dent 5 or the stripe unevenness 3 occur on the surface of the steel sheet. Therefore, a roller cleaning apparatus capable of effectively removing foreign matter adhering to the surface of the swing arm roller 10 will be described below.

FIG. 3 is a view schematically showing a roller cleaning apparatus according to an embodiment of the present invention, and FIG. 4 is a side view of the roller cleaning apparatus shown in FIG. 5 is a view showing a connection state of the controller. Fig. 6 is an enlarged view of A shown in Fig. 3, and Fig. 7 is an enlarged view of B of Fig. 3 to 7, the roller cleaning apparatus includes a main frame 8 for supporting the swing arm roller 10, a housing 30 provided on the upper portion of the main frame 8, A cleaning member 40 installed inside the swing arm roller 10 for cleaning the swing arm roller 10 and a jet member 50 for spraying fluid (e.g., washing water) to the swing arm roller 10.

The housing 30 is installed on the upper portion of the main frame 8 and is disposed along the longitudinal direction of the swing arm roller 10. The lower end of the swing arm roller 10 is located in the receiving space 31 of the housing 30. [ The swing arm roller 10 is rotatably coupled to the swing arm roller shaft 11 at both ends of the swing arm roller shaft 11 by means of bearings 13 provided on the support shaft 12, ). The support shaft 12 is supported by the main frame 8 and can move together with the main frame 8.

Meanwhile, the main frame 8 may be disposed along the longitudinal direction of the swing arm roller 10 and below the swing arm rollers 10 arranged along the up and down direction. The main frame 8 is supported on the vertical frame 20 and the vertical frame 20 is connected to the main frame 8 so as to be rotatable in the horizontal direction. For example, the driving motor 22 may be installed on one side of the vertical frame 20, and the driving pulley 23 may be provided on the driving motor 22. A driven pulley 26 may be installed below the vertical frame 20 and a drive belt 25 may be connected between the drive pulley 23 and the driven pulley 26 to drive the drive pulley 26, The frame 20 can rotate with the main frame 8.

The main frame 8 and the swing arm rollers 10 are symmetrically arranged to support the left and right lower portions of the steel sheet S, And is rotatably mounted in a supported state. Thus, when the looper (130 in FIG. 2) is advanced along the horizontal rail (140 in FIG. 2), the swing arm rollers 10 pivot about the vertical frame 20, It has a structure that does not interfere with the progress.

The moving plate 60 is disposed substantially in parallel to the lower portion of the swing arm roller shaft 11 and is installed in the receiving space 31. A ball cover housing 52 having a spray hole 51 for spraying fluid (e.g., washing water) to the swing arm roller 10 is formed on the moving plate 60. The ball cover housing 52, A ball 55 protruding from the injection hole 51 toward the swing arm roller 10 is mounted. The upper end of the injection member 50 may have a shape in which the diameter of the injection hole 51 is reduced and the ball 55 is supported by the guide bar 54 provided in the ball cover housing 52, And is separately rotatable with the guide bar 54. [

The injection member 50 may be provided in a plurality of positions spaced along the longitudinal direction of the moving plate 60 and the moving plate 60 is formed with an upper hole 61 at a position corresponding to the injection hole 51 . A moving shaft 64 is inserted into an insertion hole 62 formed at both sides of the upper hole 61 at the lower end of the moving plate 60 and a diameter larger than the diameter of the insertion hole 62 is formed at the lower end of the moving shaft 64 The touch ring 65 is connected. The touch ring 65 is a material attached to a magnet and an electromagnet, and may be, for example, iron (Fe).

A support frame 9 is erected between the main frame 8 and the housing 30 to form an internal space 7. The electromagnet plates 67 are installed in the internal installation space 7 and can be disposed under the touch rings 65, respectively. A first elastic member 68 is provided on each of the moving shafts 64. The first elastic member 68 is disposed between the bottom surface of the housing 30 and the moving plate 60 to move the moving plate 60 It is possible to provide an elastic force toward the center. A stretchable and contractible pipe 35 is connected between the lower hole 33 formed in the housing 30 and the upper hole 61 formed in the moving plate 60 and connected to the injection hole 51 through an auxiliary supply pipe, As shown in Fig.

Front and rear ring brackets 70a and 70b are provided to protrude forward and backward (with reference to the rotating direction of the swing arm roller 10) of the moving plate 60, respectively. The front and rear ring brackets 70a and 70b are disposed along the longitudinal direction of the moving plate 60 and can have a predetermined inclination so as to be positioned within substantially the same radius with respect to the center of the swing arm roller 10. [ As described above, the accommodating space 31 is movable toward the swing arm roller 10 and the injection member 50 capable of spraying the washing water to the swing arm roller 10, so as to be in contact with the swing arm roller 10, A cleaning member (40) capable of removing contaminants adhered to the roller (10) is disposed.

The cleaning member 40 has front and rear polishing pads 40a and 40b disposed forward and rearward relative to the spray nozzle 50 and a blade 45 disposed in front of the front polishing pad 40a . The front and rear polishing pads 40a and 40b are mounted on the front and rear pad housings 41a and 41b respectively and the front and rear pad housings 41a and 41b have an open top shape, (40a, 40b) can contact the swing arm roller (10) through the open top of the front and rear pad housings (41a, 41b).

A ring shaft 47 is connected to the lower end portions of the front and rear pad housings 41a and 41b and the ring shaft 47 is inserted into the through holes 71 penetrating through the front and rear ring brackets 70a and 70b respectively. The lower end of the ring shaft 47 is supported by the front and rear ring brackets 70a and 70b by connecting a limiter ring 48 having a larger diameter than the through holes 71, respectively. A second elastic member 49 is provided on each ring shaft 47 and a second elastic member 49 is provided between the front and rear ring brackets 70a and 70b and between the front and rear pad housings 41a and 41b Respectively, to provide an elastic force toward the front and rear pad housings 41a and 41b.

The auxiliary ring bracket 72 may be provided in front of the front ring bracket 70a and the auxiliary ring bracket 72 may also be provided with a predetermined inclination such that the auxiliary ring bracket 72 is positioned substantially within the same radius as the center of the swing arm roller 10 Lt; / RTI > The blade housing 74 is mounted with the doctor blade 45 and the doctor blade 45 can be disposed toward the center of the water hammer roller 10. [ An auxiliary ring shaft 75 is connected to the lower portion of the blade housing 74 and the auxiliary ring shaft 75 is inserted into the auxiliary through hole 76 formed in the auxiliary ring bracket 72. An auxiliary limiter ring 77 having a larger diameter than the auxiliary through hole 76 is connected to the lower portion of the auxiliary ring shaft 75 so that the blade housing 74 is supported by the auxiliary ring bracket 72. The third elastic member 78 is provided on the auxiliary ring shaft 75 and can be disposed between the blade housing 74 and the auxiliary ring bracket 72 to provide an elastic force toward the blade housing 74. [ The first to third elastic members 68, 49, 78 described above may be elastic springs.

4, the supply pipe 80 has a main supply pipe 81, an expansion supply pipe 82 and an auxiliary supply pipe 83. The return pipe 85 is connected to the main return pipe 86, An elastic return pipe 87, and an auxiliary return pipe 88. The main supply pipe 81 and the main return pipe 86 are installed on one side of the vertical frame 20 and can be disposed substantially in parallel with the vertical frame 20. [ The auxiliary supply pipe 83 and the auxiliary return pipe 88 can be fixedly mounted on the upper portion of the main frame 8 and the auxiliary supply pipe 83 is connected to the lower hole 33 of the housing 30. [ The housing 30 has a foreign matter discharge hole 34 formed at one side of the lower hole 33 and the auxiliary return pipe 88 is connected to the foreign matter discharge hole 34.

The expansion supply piping 82 is connected between the main supply piping 81 and the auxiliary supply piping 83 and the expansion return piping 82 is connected between the main return piping 81 and the auxiliary return piping 83. The main frame 8 is supported by the vertical frame 20 and is rotatable in the horizontal direction so that the washing water can be supplied to the jetting member 50 through the expansion and contraction supply pipe 82, The contaminants and washing water dropped into the space 31 can be easily discharged to the outside through the elastic return pipe 87. The expansion / contraction supply pipe 82 and the expansion / exhaust pipe 87 may be of the bellows type or the loop type.

The main supply pipe 81 may be provided with a valve 84 for opening and closing the main supply pipe 81. The controller 90 is connected to the valve 84 and the electromagnet plate 67 Respectively. That is, when the steel plate S is transferred to the upper portion of the swing arm roller 10, the controller 90 blocks the current supplied to the electromagnet plate 67 so that the touch ring 65 and the electromagnet plate, Separated. The cleaning member 40 is brought into contact with the surface of the swing arm roller 10 by the elastic force of the first elastic member 68 provided between the moving plate 60 and the housing 30, It can be cleaned. The controller 90 supplies washing water to the spray member 50 by opening the valve 84 while shutting off the current to the electromagnet plate 67. The wash water is supplied to the swing arm roller 10).

Fig. 8 is a plan view of the roller cleaning apparatus shown in Fig. 3, and Fig. 9 is a view showing the moving state of the roller cleaning apparatus shown in Fig. 8 and 9, the swing arm rollers 10 have a symmetrical structure for supporting the left and right lower portions of the steel sheet S, respectively, and the main frame 8 is supported by the respective swing arm rollers 10, And is rotatable in a state of being supported by the vertical frame 20 in a state in which it is supported. That is, when the loupcar (130 in FIG. 2) moves along the horizontal rail (140 in FIG. 2), the main frame 8 is arranged in parallel with the horizontal rail (140 in FIG. 2) The swing arm roller 10 is rotated by the driving force of the driving motor 22 connected to the vertical frame 20 so as not to interfere with the advance of the steel plate S As shown in Fig.

FIGS. 10 and 11 are views showing the operation of the roller cleaning apparatus shown in FIG. As shown in Fig. 10, the controller 90 maintains the state of being engaged with the touch ring 65 by applying current to the electromagnet plate 67, and the valve 84 remains closed. Thus, the front and rear polishing pads 40a, 40b and the doctor blade 45 have a standby position spaced from the swing arm roller 10. [

11, the controller 90 cuts off the electric current supplied to the electromagnet plate 67, so that the touch ring 65, which is attached to the swing arm roller 10, And the electromagnet plate 67 are separated from each other. The moving plate 60 is moved upward by the elastic force of the first elastic member 68 provided between the moving plate 60 and the housing 30 so that the cleaning member 40 moves up with the moving plate 60 It is possible to contact the surface of the swing arm roller 10 to clean the swing arm roller 10. The front and rear polishing pads 40a and 40b and the blade 45 are provided with second and third elastic members 49 and 78 respectively at the lower portion thereof to minimize wear of the swing arm roller 10, Can be removed.

The controller 90 supplies the washing water to the spray member 50 by opening the valve 84 while shutting off the current to the electromagnet plate 67. The wash water is supplied to the swing arm roller 10 through the spray hole 51, . The contaminants attached to the swing arm roller 10 are effectively removed by the spray nozzle 50 for spraying the washing water and the front and rear polishing pads 40a and 40b and the doctor blade 45, The washing water is recovered through a return pipe 85 connected to the housing 30 and discharged to the outside. Therefore, it is possible to effectively clean the swing arm rollers 10 disposed along the up and down direction, to recover the pollutants and wash water adhering to the swing arm rollers 10 and discharge them to the outside, It is possible to prevent the contaminants from falling down.

The ball 55 provided in the jetting member 50 protrudes toward the swing arm roller 10 and can rotate together with the swing arm roller 50 so that the front and rear polishing pads 40a and 40b, When the blade 45 is worn, the user can recognize the replacement timing, and the swing arm roller 10 can be prevented from coming into contact with the ball cover housing 52 and being broken. In addition, as compared with the case where the conventional worker manually handles the swing arm roller 10, the productivity and quality of the steel sheet can be improved by quickly and effectively cleaning the contaminants attached to the swing arm roller 10 And it is possible to prevent a safety accident of the operator in advance.

The above-described roller cleaning apparatus is not limited to the configuration of the above-described embodiments, but all or a part of the embodiments may be selectively combined so that various modifications may be made to the embodiments.

5: Dent 7: Internal installation space
9: Support frame 10: Swing arm roller
12: support shaft 20: vertical frame
22: drive motor 25: drive valve
30: housing 31: accommodation space
33: lower hole 34: foreign matter discharge hole
35: extension pipe 40: cleaning member
41a: front polishing pad 40b: rear polishing pad
45: Doctor blade 47: Ring shaft
48: Limiter ring 49: Second elastic member
50: injection member 51: injection hole
52: ball cover housing 55: ball
60: moving plate 61: upper hole
64: movement axis 65: touch ring
67: electromagnet plate 68: first elastic member
70a: front ring bracket 70b: rear ring bracket
72: auxiliary ring bracket 75: auxiliary ring shaft
77: auxiliary limiter ring 78: third elastic member
80: Supply piping 82: Extension supply piping
85: return pipe 87: stretch return pipe
88: valve 90: controller

Claims (14)

A cleaning member which is movable toward the roller in association with a separate frame, and which is capable of removing foreign matter adhering to the roller in contact with the roller; And
And a jet member provided at one side of the cleaning member and capable of jetting fluid toward the roller,
Wherein the cleaning member is connected to a main frame provided on one side of the roller which rotates in one direction and supports the roller,
Wherein the injection member includes a ball cover housing having an internal hollow injection hole for injecting the fluid and a ball protruding from the injection hole toward the roller to be in contact with the roller and rotatable,
Wherein the fluid is injected into the roller through a space formed between the ball and the sidewall of the injection hole. delete delete The method according to claim 1,
The cleaning member
A front and rear polishing pad spaced apart from each other along a circumferential direction of the roller with respect to a rotational direction of the roller; And
And a doctor blade installed on one side of the front and rear polishing pads,
Wherein the jetting member is disposed between the front and rear polishing pads. 5. The method of claim 4,
The roller cleaning device includes:
A housing connected to the main frame, the housing having a receiving space having one end of the roller, the cleaning member and the jet member, and a lower hole communicating with the jet hole on a bottom surface thereof; And
Further comprising a moving plate connected to a lower portion of the jetting member in parallel with the longitudinal direction of the roller and having an upper hole at a position corresponding to the jetting hole. 6. The method of claim 5,
The roller cleaning device includes:
A stretchable and contractible pipe connected to the lower hole and the upper hole so as to communicate with each other;
A moving shaft disposed below the moving plate, the moving shaft being inserted into insertion holes formed on both sides of the lower hole, respectively, and being movable; And
And a transferring member connected to the moving shaft and capable of switching the cleaning member to an operating position in contact with the surface of the roller and a standby position in which the cleaning member is detached from the surface of the roller. The method according to claim 6,
The roller cleaning device includes:
And a support frame installed between the upper surface of the main frame and the bottom surface of the housing to form an internal installation space,
Wherein,
A touch ring fixed to a lower end of the moving shaft and having a larger diameter than the insertion hole, the touch ring being attached to the magnet;
An electromagnet plate disposed at a lower portion of the touch ring and installed in the internal space for providing a magnetic force; And
And a first elastic member provided between the moving plate and the bottom surface of the housing to provide an elastic force toward the moving plate. 8. The method of claim 7,
Further comprising front and rear pad housings each mounted with the front and rear polishing pads and connected to move toward the center of the roller by being supported by the moving plate. 9. The method of claim 8,
The roller cleaning device includes:
Front and rear ring brackets connected to both sides of the moving plate and supported by the moving plate;
A ring shaft which is inserted into the through holes formed in the front and rear ring brackets respectively and is movable and whose upper end is connected to the lower end of the front and rear pad housings respectively;
A limiter ring fixed to the lower end of the ring shaft and having a larger diameter than the through-hole; And
Further comprising second elastic members provided between said front and rear pad housings and said front and rear ring brackets respectively to provide an elastic force toward said front and rear ring brackets. 10. The method of claim 9,
The roller cleaning device includes:
An auxiliary ring bracket installed in front of the front ring bracket;
A blade housing on which the doctor blade is mounted;
An auxiliary ring shaft connected to a lower end of the blade housing, the auxiliary ring shaft being inserted and movable in a secondary through hole formed in the auxiliary ring bracket;
An auxiliary limiter ring fixed to a lower end of the auxiliary ring shaft and having a larger diameter than the auxiliary through-hole;
And a third elastic member provided between the blade housing and the auxiliary ring bracket to provide an elastic force toward the blade housing. 8. The method of claim 7,
Wherein the plurality of ejection members are provided along a longitudinal direction of the moving plate,
The roller cleaning device includes:
A supply pipe branched and connected to a lower hole formed in the housing and supplying the fluid to the lower hole;
A valve connected to the supply pipe and capable of opening and closing the supply pipe; And
Further comprising a controller connected to the electromagnet plate and the valve to open the valve when the current in the electromagnet plate is cut off. 12. The method of claim 11,
The housing has a fluid discharge hole formed at one side of the lower hole,
The roller cleaning device includes:
A vertical frame disposed at one side of the main frame, the vertical frames being respectively arranged in a vertical direction and each of the main frames being connected to be rotatable in a horizontal direction;
And a return pipe communicating with the fluid discharge hole and capable of discharging the fluid and foreign matter contained in the containing space to the outside. 13. The method of claim 12,
Wherein the supply pipe comprises:
A main supply pipe fixedly installed in parallel with the vertical frame;
An auxiliary supply pipe branched to communicate with the lower holes and supported by the main frame; And
And an expansion / contraction supply pipe connected between the auxiliary supply pipe and the main supply pipe,
In the return pipe,
A main return pipe fixedly installed in parallel with the main supply pipe;
An auxiliary return pipe connected to the fluid discharge hole and supported by the main frame; And
And a stretch return pipe connected between the auxiliary return pipe and the main return pipe and expandable and contractible. A roller cleaning apparatus according to any one of claims 1 and 4 to 13, wherein the steel sheet is stored and stored in such a manner that continuous processing is possible without slowing down and stopping the equipment while the leading steel sheet and the trailing steel sheet are being welded. In the supplying looper equipment,
A plurality of steering rollers mounted on the frame to change a traveling direction of the steel strip;
A plurality of deflector rollers disposed on opposite sides of the steering rollers and mounted to change a traveling direction of the steel sheet; And
And a plurality of swing arm rollers installed between the steering rollers and the deflector rollers to support the steel strip to prevent the steel strip from falling down,
Wherein the roller cleaning apparatus is installed below the swing arm rollers to clean the swing arm rollers.

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