KR20160131788A - Roller cleaning apparatus to move forward and backward - Google Patents

Abstract

The present invention relates to a roller surface foreign matter removing apparatus, and more particularly, to a roller surface foreign matter removing apparatus comprising: a blade portion contacting with a rotating roller to remove foreign matter from the roller surface; And a front-to-rear conveying portion for causing the blade portion to move back and forth between a contact position where the blade portion is in contact with the roller and a separation position where the blade portion is spaced apart from the roller.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a roll surface cleaning device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller surface foreign matter removing device, and more particularly, to a roller surface foreign matter removing device capable of moving back and forth so as to be contacted with and spaced from a roller to be cleaned.

Generally, the surface of various rollers used in production sites such as steel mill, paper, printing, film, food, chemical factory, etc. are subject to various types of foreign substances such as cooling water, scale, dust, oil and the like depending on the manufacturing process and working environment. Such a foreign matter causes marks and contamination on the surface of the product passing through the roller, which is a cause of defective product.

In addition, when the apparatus is operated for a long time in a state in which foreign matter is present on the surface of the roller, the surface of the roller may be easily damaged and damaged.

Thus, a roller surface foreign material removing device capable of removing foreign substances on the surface of the roller is used. An example of a conventionally used roller surface foreign matter removing apparatus is disclosed in Japanese Patent Application Laid-Open No. 10-2012-0091730 entitled " Device for removing foreign matters on a roller surface provided with a foreign matter blocking member ".

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view schematically showing the operation of a conventional roller surface foreign matter removing apparatus. As shown in the drawing, the conventional foreign matter removing apparatus 10 causes the blade 11 to slantingly contact the surface of the roller A at an angle to remove the foreign matter B on the surface of the roller A.

However, in the conventional roller surface foreign matter removing apparatus as described above, the blade holder 10 is fixedly disposed on one side of the roller (A). That is, the blade 11 is fixed at a position where it can contact the roller A surface. Accordingly, when the roller A is to be separated from the roller rotary shaft for repairing and replacing the roller A, interference with the blade 11 occurs, which makes it difficult to repair the roller.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a roller surface foreign matter removing device in which the blade is moved away from the roller so that repair and replacement of the roller can be facilitated.

Another object of the present invention is to provide a roller surface foreign matter removing device capable of adjusting the angle at which the blade contacts the roller, thereby improving the foreign matter removal efficiency of the roller surface.

It is still another object of the present invention to provide a roller surface foreign matter removing apparatus which can move left and right in a state in which a blade is in contact with a roller to further improve the efficiency of removing foreign matter.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by a roller surface foreign matter removing device capable of moving back and forth. The roller surface foreign matter removing device of the present invention comprises: a blade portion for contacting a rotating roller to remove foreign matter on the roller surface; And a front-to-rear conveying portion for causing the blade portion to move back and forth between a contact position where the blade portion is in contact with the roller and a separation position where the blade portion is spaced apart from the roller.

According to one embodiment, the front and rear conveying sections can be driven by a motor, a pneumatic cylinder, a hydraulic cylinder or a chain.

According to an embodiment, the apparatus may further include a contact angle adjusting unit for adjusting a contact angle of the blade portion contacting the roller.

According to one embodiment, the blade portion includes: a blade contacting the roller; a blade holder for supporting the blade; A blade shaft coupled to a rear end of the blade holder; And a foreign matter guide plate extending forward from the blade shaft and guiding foreign matter separated from the roller surface by contact with the blade into the blade holder.

According to an embodiment of the present invention, the apparatus further includes a left and right conveying unit provided between the blade shaft and the engagement plate for moving the blade shaft such that the blade shaft is reciprocated by a predetermined distance in the left and right direction with respect to the roller, A left and right oil shafts coupled to one end of the blade shaft; And a third pneumatic driver for applying driving force to the left and right paddles to be stretched or compressed.

The roller surface foreign matter removing apparatus according to the present invention is provided so as to be movable back and forth between a contact position where the blade portion is in contact with the roller and a spaced apart position between the roller and the roller. Thus, during the replacement, repair, and non-operation of the rollers, the roller surface foreign material removing device is at a position spaced apart from the rollers.

Since the roller and the blade portion are not in contact with each other at the spaced position, when the roller is separated by the rotating shaft for replacement and repair of the roller, the blade portion does not interfere and work can be facilitated.

The roller surface foreign matter removing device according to the present invention may include a contact angle adjusting unit to adjust the angle at which the blade contacts the roller. Accordingly, it is possible to adjust the angle of contact between the blade and the roller according to the diameter of the roller, the purpose of use, and the like, thereby enhancing the efficiency of removing foreign matter.

Also, the roller surface foreign matter removing apparatus according to the present invention is provided with a right and left conveying portion so that the blade is repeatedly moved left and right along the axial direction of the roller. The lateral movement of the blades causes the transfer pressure to be added to the surface of the roller to clean the surface of the roller more cleanly.

1 is a schematic view showing a structure of a conventional roller surface foreign matter removing apparatus,
FIG. 2 is a perspective view showing a state in which the roller surface foreign matter removing device according to the present invention is in a spaced apart position from the roller,
3 is a perspective view showing a state in which the roller surface foreign matter removing device according to the present invention is in contact with the roller,
FIG. 4 is an exploded perspective view of the roller surface foreign matter removing apparatus according to the present invention,
FIGS. 5 and 6 are views illustrating an operation process of the roller surface foreign matter removing apparatus according to the present invention,
7 is an exemplary view showing an operation process of the roller surface foreign matter removing apparatus according to the present invention in accordance with the lateral movement.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Detailed descriptions of well-known functions and constructions which may be unnecessarily obscured by the gist of the present invention are omitted.

FIG. 2 is a perspective view showing a configuration of a roller surface foreign matter removing apparatus 100 according to the present invention in a spaced apart position from a roller A, FIG. 3 is a perspective view of a roller surface foreign matter removing apparatus 100 according to the present invention, FIG. 4 is an exploded perspective view showing the structure of the roller surface foreign matter removing apparatus 100 in an exploded manner. FIG.

As shown in the figure, the roller surface foreign matter removing apparatus 100 according to the present invention is not fixed in a state of being in contact with the surface of the roller A to be cleaned, but can be moved back and forth between the state of being separated from the roller A Respectively. When the roller A is to be separated from the roller shaft a for replacement or maintenance of the roller A, the roller surface foreign matter removing apparatus 100 is separated from the roller A as shown in FIG. 2 And does not interfere with the separation of the roller (A).

When the surface of the roller A needs to be cleaned, it is moved in contact with the roller A as shown in FIG. 3, and the contact angle with which the roller A is contacted and the contact pressure are adjusted to improve the foreign material removal efficiency .

The roller surface foreign matter removing apparatus 100 according to the present invention includes a blade portion 110 for contacting foreign matter on the surface of the roller A in contact with the roller A, A contact angle adjusting unit 120 for adjusting an angle and a pressure to be contacted with the roller A and a front and rear transferring unit 130 for moving the blade unit 110 back and forth so that the blade unit 110 contacts or separates the roller A, And a left and right conveying unit 140 for conveying the blade 117 such that the blade 117 is moved laterally along the axial direction of the roller A. [

The blade portion 110 includes a blade shaft 113 that is adjusted in contact angle with the roller A by the contact angle adjusting portion 120, a shaft receiving bar 111 that receives the blade shaft 113, A blade coupling holder 115 which extends toward the front of the roller 111 and to which a blade 117 is coupled and a blade 117 which contacts the surface of the roller A and removes foreign matter from the surface of the roller A, And a foreign matter guide plate 119 extending forward from the upper portion of the shaft receiving bar 111 and guiding a foreign matter separated from the surface of the roller A by the blade 117 into the blade engaging holder 115 do.

The shaft receiving bar 111 is formed in a box shape and accommodates a blade shaft 113 therein. The shaft receiving bar 111 is fixed to the blade engaging holder 115 and the foreign matter guide plate 119. At this time, the shaft receiving bar 111, the blade coupling holder 115, and the foreign matter guide plate 119 can be fastened by fastening members such as screws. The shaft receiving bar 111 is integrally coupled to the blade shaft 113 to transmit an angle change of the blade shaft 113 to the blade coupling holder 115 and the foreign matter guide plate 119.

The blade engagement holder 115 and the foreign matter guide plate 119 are formed in a " C "shape formed with an opening toward the roller A. 6, when the blade 117 comes into contact with the roller A and separates the foreign matter B on the surface of the roller A, the separated foreign matter B passes through the opening to the blade engaging holder 115 And is held in the receiving space between the foreign matter guide plates 119. The foreign matter guide plate 119 is disposed in the inner space of the blade coupling holder 115 so as to prevent the foreign matter B separated from the surface of the roller A from scattering around and reattached to the surface of the roller A again Guide.

The blade 117 is detachably engaged with the end of the blade coupling holder 115 to remove the foreign matter B on the surface of the roller A. [ The blade 117 is made of a material having elasticity or a metal plate to scratch the surface of the roller A at a certain pressure to remove foreign matter on the surface of the roller A. [

Here, the roller surface foreign matter removing apparatus 100 according to the preferred embodiment of the present invention is provided with a pair of upper and lower blade units 110 around the front and rear transfer unit 130. That is, the blade portion 110 provided at the upper portion and the lower blade portion 110a provided at the lower portion come into contact with the roller A at different angles, and the foreign substances on the surface of the roller A are removed in a second order. The configuration of the lower blade portion 110a is the same as that of the blade portion 110 provided at the upper portion, and thus a detailed description thereof will be omitted.

The contact angle adjusting unit 120 adjusts the contact angle and contact pressure at which the blade 117 contacts the roller A as shown in FIG. The blade portion 110 which is moved back and forth by the forward / backward feed portion 130 is adjusted in the separation position and the angle of the blade 117 at the contact position differently.

5A, the blade 117 is rotated and positioned in the direction away from the surface of the roller A, and at the contact position, as shown in FIG. 6, As shown in Fig.

The contact angle adjusting unit 120 is moved from the spaced state to the contacting state to adjust the angle at which the blade 117 is rotated. The contact angle adjusting unit 120 includes a shaft coupling plate 121 coupled to both ends of the blade shaft 113, a worm gear 123 provided on the outer side surface of the shaft coupling plate 121, An elastic member 128 provided between the shaft coupling gear 127 and the blade shaft 113 and an elastic force of the elastic member 128. The elastic force of the elastic member 128 is transmitted to the worm gear 123, And a first pneumatic driving part 129 acting on the pneumatic pressure in a direction opposite to the first pneumatic driving part 129.

The shaft coupling plate 121 is made of a plate-like material having a predetermined area. The shaft coupling plate 121 is coupled to both ends of the blade shaft 113 and supports the worm gear 123. The blade shaft 113 protrudes outside the shaft coupling plate 121 through the shaft coupling plate 121. The shaft coupling gear 127 is coupled to the end of the outwardly projecting blade shaft 113. A gear train is formed on the outer periphery of the shaft coupling gear 127.

The worm gear 123 is provided on one side of the shaft coupling gear 127 so as to be gear-engaged with the shaft coupling gear 127. A worm gear control lever 125 for manually rotating the worm gear 123 is provided at an upper portion of the worm gear 123.

 An elastic member 128 is provided on the inner surfaces of the blade shaft 113 and the shaft coupling plate 121. The elastic member 128 may be a torsion spring. An elastic member 128 is provided on the inner surface of the shaft coupling plate 121 and an axial coupling gear 127 is provided on the outer surface of the shaft coupling plate 121.

The elastic member 128 may be a torsion spring that exerts an elastic force by a twist angle, or a coil spring that compresses or elongates and exerts an elastic force.

The user rotates the worm gear control lever 125 in the direction in which the elastic member 128 is wound. At this time, the contact angle at which the blade 117 is in contact with the roller A in the contact state is adjusted according to the amount of rotation by which the user rotates the worm gear control lever 125. As the user rotates the worm gear control lever 125 more, the blade 117 is rotated at a larger angle than the blade 117 in the separated state, so that the blade 117 is brought into contact with the roller A.

The first pneumatic drive 129 provides pneumatic pressure to the blade shaft 113 in a direction in which the elastic member 128 is wound. The elastic member 128 wound by the worm gear control lever 125 tries to apply an elastic force in the unwinding direction. The first pneumatic drive 129 provides pneumatic pressure to the blade shaft 113 so that the elastic member 128 is kept in a state without being unwound.

The elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the elastic force of the spring 116 And is brought into contact with the roller (A).

The operator adjusts the angle at which the blade 117 contacts the roller A by using the worm gear control lever 125 in consideration of the diameter of the roller A and the intended use.

The front and rear conveying part 130 moves the blade part 110 forward and backward to move between the separation position and the contact position. The front and rear conveying sections 130 are provided on both sides of the blade section 110, respectively. The front and rear conveying part 130 includes a coupling plate coupling bar 131 fixedly coupled to the shaft coupling plate 121, a coupling bar guide block 133 supporting the coupling plate coupling bar 131 to be moved back and forth, And a second pneumatic driver 137 for providing a driving force to move the bar 131.

The coupling plate coupling bar 131 is formed to have a length longer than the length through which the blade portion 110 is conveyed back and forth. The front end of the coupling plate coupling bar 131 is fixed to the shaft coupling plate 121. At this time, a pair of shaft coupling plates 121 are fixed to the upper and lower portions of the coupling plate coupling bar 131.

A guide groove 131a having a length corresponding to the forward and backward travel distance of the blade 110 is formed on the plate surface of the coupling plate coupling bar 131. The coupling bar guide block 133 is fixed to both side walls of the blade portion 110, which are not shown in the drawing but are spaced apart from each other. A guide groove coupling block 133a protrudes by a predetermined length and is inserted into the guide groove 131a inside the coupling bar guide block 133. [ The coupling plate coupling bar 131 is moved back and forth in a state where the guide groove coupling block 133a is inserted into the guide groove 131a.

The second pneumatic driving part 137 provides the driving force such that the coupling plate coupling bar 131 is moved back and forth by pneumatic pressure. The second pneumatic driving unit 137 supplies or discharges the working fluid to / from the forward / backward pneumatic cylinder 135 so that the length of the elevating rod 135a is extended or contracted.

The rear end of the elevating rod 135a is inserted into the forward and rearward pneumatic cylinder 135 and the front end 135b of the elevating rod 135a is fixed to the elevating rod engaging rib 121a of the shaft coupling plate 121. 5 (b), when the length of the elevating rod 135a becomes long, the shaft engaging plate 121 coupled to the elevating rod 135a is moved forward As shown in FIG. At this time, the coupling plate coupling bar 131 to which the shaft coupling plate 121 is fixed is moved forward by the guide of the coupling bar guide block 133, and the blade 110 is moved to the contact position.

On the contrary, when the air pressure acting on the second pneumatic driving part 137 is removed, the length of the elevating rod 135a is shortened and the shaft coupling plate 121 is retracted backward as shown in Fig. 5 (a) . Whereby the blade portion 110 is moved to the separated position.

The left and right conveying unit 140 moves the blade 117 that contacts the roller A at the contact position and removes the foreign matter B at predetermined intervals along the axial direction of the roller A to improve the removal efficiency of the foreign matter .

4, the left and right conveying unit 140 includes left and right conveying pneumatic cylinders 141 coupled to the outside of the shaft coupling plate 121 and left and right padding shafts 143 extending coaxially with the blade shaft 113, A bearing 145 connecting the blade shaft 113 and the right and left shafts 143 and a third pneumatic cylinder 147 for providing pneumatic pressure to the right and left pneumatic cylinders 141.

Here, the contact angle adjusting unit 120 is provided at one side with respect to the blade shaft 113, and the left and right transfer unit 140 is driven at the other side. The worm gear 123 and the shaft coupling gear 127 are provided on the outer side of the shaft coupling plate 121 at one side thereof while the shaft coupling plate 121 is provided at both sides of the blade shaft 113. However, A structure of the left and right conveying part 140 including the cylinder 141 is provided.

The left and right pivot shafts 143 are inserted into the left and right feeding pneumatic cylinders 141 according to whether the working fluid is supplied to the left and right feeding pneumatic cylinders 141 of the third pneumatic cylinder 147 and are shortened in length, ) To protrude outward to extend the length. The blade unit 110 is moved to the left and right by a length such that the left and right padding shafts 143 are exposed to the outside of the left and right transfer pneumatic cylinders 141.

The bearing 145 couples the blade shaft 113 and the left and right shafts 143 to each other. 7 (a), when the length of the left and right padding shafts 143 is long, the blade portion 110 that has been moved to the right side is pivoted to the left and right paddles 143 ) Is shortened and moved to the left. In this process, the blade 117 is moved to the left and right of the roller A and pressure can be exerted to further improve the foreign matter removal efficiency.

The operation of the roller surface foreign matter removing apparatus 100 according to the present invention having such a configuration will be described with reference to Figs. 2 to 7. Fig.

2 and 3, a single roller surface foreign material removing device 100 is shown to remove foreign matter on one roller A surface. However, this is merely an example, and considering that a pair of rollers A are normally provided in the upper and lower portions and that the object to be conveyed is conveyed between the pair of rollers A, A plurality of roller surface foreign matter removing apparatuses 100 may be provided.

At this time, the plurality of roller surface foreign matter removing apparatuses 100 may be provided so as to move in the forward and backward directions in directions opposite to each other in order to avoid interference during operation.

The roller surface foreign material removing apparatus 100 is in a spaced-apart position in which the blade portion 110 is spaced apart from the roller A during a period when the drive of the roller A is stopped or the roller A is replaced or maintained. As shown in FIGS. 2 and 5 (a), the front and rear conveying unit 130 drives the blade unit 110 in a retracted state.

The elevating bars 135a are provided in a minimum length in a state of being inserted into the forward and backward pneumatic cylinders 135. [ The shaft coupling plate 121 coupled with the elevating rod 135a is also positioned in the state of being most distant from the roller A. [ The coupling plate coupling bar 131 is positioned in a state of being supported by the coupling bar guide block 133.

In this state, the operator rotates the worm gear control lever 125 to adjust the contact angle between the blade 117 and the roller A. The contact angle between the blade 117 and the roller A may be set only once at the initial setting value. By the rotation of the worm gear control lever 125, the elastic member 128 is wound in the initial state in which the elastic member 128 is unwound, and elastic force is applied in the direction in which the elastic member 128 is unwound, that is,

However, the first pneumatic drive 129 applies air pressure, and the blade 117 is positioned in a direction away from the roller A. [ The elastic member 128 applies an elastic force to be unwound in the direction in which it comes into contact with the roller A while being wound around the blade shaft 113. However, the elastic member 128 is kept wound by the pressure of the first pneumatic driver 129. [

When the operator applies a driving signal of the roller surface foreign material removing apparatus 100, the blade portion 110 is moved toward the roller A as shown in FIG. 5 (b). When the air pressure acts on the forward / backward pneumatic cylinder 135 from the second pneumatic drive 137, the lift rods 135a are extended. The shaft coupling plate 121 is moved toward the roller A by the extension of the elevating rod 135a and the coupling plate coupling bar 131 is linearly moved under the guidance of the coupling bar guide block 133. [

When the blade 110 is moved closer to the roller A, the first pneumatic driving part 129 removes the air pressure applied to the blade shaft 113 as shown in FIG. As a result, the elastic member 128 wound on the blade shaft 113, that is, the torsion spring is rotated in the unwinding direction, and the blade shaft 113 is also rotated in the counterclockwise direction in conjunction therewith. The blade 117 is brought into contact with the surface of the roller A by the rotation of the blade shaft 113. [ At this time, the lower blade 119a is rotated clockwise.

When the roller (A) is driven to rotate, the blade (117) removes the foreign matter (B) adhering to the surface of the roller (A). The removed foreign matter B is introduced into the blade coupling holder 115 by the guidance of the foreign matter guide plate 119 and accommodated therein.

On the other hand, the blade 117 is moved reciprocally by a certain distance in the state of being in contact with the surface of the roller (A). The third pneumatic cylinder 147 acts on the left and right pneumatic cylinders 141 as shown in FIG. 7 (a), and the length of the left and right pivots 143 is elongated or contracted. 7 (a), the blade 117 is moved to the left as shown in FIG. 7 (b) with the blade 117 moved to the right.

The action of the air pressure is repeatedly performed and the blade unit 110 moves reciprocally left and right like a wiper to remove the foreign matter B on the surface of the roller A. [ It is possible to remove the foreign matter B on the surface of the roller A more cleanly by adding the left and right transfer pressures as well as the contact pressure.

While the roller A is being driven, the roller surface foreign material removing apparatus 100 maintains the state of contact with the roller A as shown in FIG. 6 and removes the foreign matter B of the roller A. When the driving of the roller A is completed, the roller surface foreign matter removing apparatus 100 returns to the position spaced apart from the roller A again as shown in Fig. 5 (a) by the operation signal of the operator.

As described above, the roller surface foreign matter removing apparatus according to the present invention is provided such that the blade is movable back and forth between a contact position where the blade is in contact with the roller and a spaced apart position between the roller and the roller. Thus, during the replacement, repair, and non-operation of the rollers, the roller surface foreign material removing device is at a position spaced apart from the rollers.

Since the roller and the blade portion are not in contact with each other at the spaced position, when the roller is separated by the rotating shaft for replacement and repair of the roller, the blade portion does not interfere and work can be facilitated.

The roller surface foreign matter removing device according to the present invention may include a contact angle adjusting unit to adjust the angle at which the blade contacts the roller. Accordingly, it is possible to adjust the angle of contact between the blade and the roller according to the diameter of the roller, the purpose of use, and the like, thereby enhancing the efficiency of removing foreign matter.

Also, the roller surface foreign matter removing apparatus according to the present invention is provided with a right and left conveying portion so that the blade is repeatedly moved left and right along the axial direction of the roller. The lateral movement of the blades causes the transfer pressure to be added to the surface of the roller to clean the surface of the roller more cleanly.

The embodiments of the roller surface foreign matter removing apparatus of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. You will know very well. Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

100: Roller surface foreign matter removing device 110, 110a:
111: shaft receiving bar 113: blade shaft
115: blade coupling holder 117: blade
119: Foreign matter guide plate 120: Contact angle adjusting unit
121: shaft coupling plate 121a:
123: Worm gear 125: Worm gear control lever
127: shaft coupling gear 128: elastic member
129: First pneumatic driving part 130: Front /
131: coupling plate coupling bar 131a: guide groove
133: coupling bar guide block 133a: guide groove coupling block
135: Pneumatic cylinder for transferring back and forth 135a:
137: second pneumatic driving part 140:
141: Left and right pneumatic cylinder 143: Left and right pneumatic axes
145: Bearing 147: Third pneumatic drive

Claims (5)

A blade portion contacting with the rotating roller to remove foreign matter from the surface of the roller;
And a front-to-rear conveying portion that causes the blade portion to move back and forth between a contact position where the blade portion is in contact with the roller and a separation position where the blade portion is spaced apart from the roller.
The method according to claim 1,
Wherein the front and rear conveyance units are driven by a motor, a pneumatic cylinder, a hydraulic cylinder, or a chain.
3. The method according to claim 1 or 2,
Further comprising a contact angle adjusting unit for adjusting a contact angle of the blade portion contacting the roller.
The method of claim 3,
The blade portion includes:
A blade in contact with the roller;
A blade holder for supporting the blade;
A blade shaft coupled to a rear end of the blade holder;
And a foreign matter guide plate extending forward from the blade shaft and guiding foreign matter separated from the roller surface by contact with the blade into the blade holder.
The method according to claim 1 or 4,
Further comprising a left and right feeding unit provided between the blade shaft and the coupling plate for moving the blade shaft such that the blade shaft is reciprocated in a left and right direction with respect to the roller,
The left-
A left and right oil shafts coupled to one ends of the blade shafts;
And a third pneumatic driving unit for applying a driving force so that the left and right pneumatic axes are extended or compressed.

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