WO2017155074A1 - クリーニング装置 - Google Patents

クリーニング装置 Download PDF

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Publication number
WO2017155074A1
WO2017155074A1 PCT/JP2017/009623 JP2017009623W WO2017155074A1 WO 2017155074 A1 WO2017155074 A1 WO 2017155074A1 JP 2017009623 W JP2017009623 W JP 2017009623W WO 2017155074 A1 WO2017155074 A1 WO 2017155074A1
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WO
WIPO (PCT)
Prior art keywords
roller
cleaning
brush
brush roller
unit
Prior art date
Application number
PCT/JP2017/009623
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
三橋　浩
加津寛 金子
新太 谷
松本　英樹
Original Assignee
バンドー化学株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by バンドー化学株式会社 filed Critical バンドー化学株式会社
Priority to JP2017521164A priority Critical patent/JP6329701B2/ja
Priority to KR1020187028959A priority patent/KR102325908B1/ko
Priority to CN201780016866.3A priority patent/CN108778536B/zh
Priority to TW106113338A priority patent/TWI725170B/zh
Publication of WO2017155074A1 publication Critical patent/WO2017155074A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/12—Brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
    • B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B11/00—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B6/00—Cleaning by electrostatic means

Definitions

  • the present invention relates to a cleaning device.
  • a cleaning device for example, there has been proposed a cleaning device that removes foreign matter on the surface of an object with a charging brush and transports and collects the removed foreign matter with a cleaning roller using the force of an electric field (Japanese Patent Laid-Open No. 2011-2011). No. 92846).
  • the present invention has been made based on the above situation, and an object of the present invention is to provide a cleaning device that can efficiently remove both relatively large foreign matters and fine foreign matters from the surface of an object. To do.
  • the invention made to solve the above-mentioned problems is a cleaning device that removes a foreign material on the surface while conveying a plate-like or film-like object, and a rotation shaft that is substantially perpendicular to the conveyance direction and substantially parallel to the conveyance surface.
  • a brush roller that is driven to rotate in a direction reverse to the conveying direction, a cleaning roller that is driven to rotate in a forward direction with respect to the conveying direction on a rotation axis that is substantially perpendicular to the conveying direction and substantially parallel to the conveying surface, and the brush
  • a first counter roller disposed substantially parallel to face the roller through the object, and a second counter roller disposed substantially parallel to face the cleaning roller through the object It is characterized by providing.
  • the cleaning device it is possible to remove relatively large foreign matters from the object with the brush roller, and it is possible to efficiently remove fine foreign matters from the object with the cleaning roller.
  • the cleaning device includes a first counter roller that faces the brush roller and a second counter roller that faces the cleaning roller, thereby removing a relatively large foreign object with the brush roller and finely cleaning with the cleaning roller. Foreign matter can be removed more efficiently.
  • the surface hardness of the first counter roller is preferably higher than the surface hardness of the second counter roller. In this way, by making the surface hardness of the first counter roller higher than that of the second counter roller, the brush roller and the cleaning roller are appropriately applied to the object by the first counter roller and the second counter roller, respectively. Therefore, the foreign matter removal efficiency can be further improved.
  • the first opposing roller may be a metal roller.
  • the first opposing roller is a metal roller, which is a relatively hard roller, so that the brush roller can be properly brought into contact with the object, so that relatively large foreign matters can be more effectively removed. can do.
  • the second opposing roller is an elastic roller.
  • a suitable nip width can be secured between the second counter roller and the cleaning roller.
  • the adhesion between the cleaning roller and the object can be improved, and fine foreign matters can be more effectively removed from the surface of the object.
  • the elastic roller has a conductive core rod, an outer surface portion of the conductive core rod that covers the outer surface of the conductive core rod, and an outer layer portion that covers the outer surface of the inner layer portion.
  • the outer layer portion can ensure antifouling property and wear resistance while ensuring elasticity by the inner layer portion.
  • the adhesion between the elastic roller and the cleaning roller can be suitably maintained, so that fine foreign matters can be removed with the cleaning roller for a long period of time.
  • the core rod and the inner layer portion have conductivity, a desired electric field can be more reliably formed between the elastic roller and the cleaning roller, and foreign matters can be effectively removed by the cleaning roller.
  • the hardness of the outer layer part is preferably higher than the hardness of the inner layer part.
  • the hardness of the outer layer portion is higher than the hardness of the inner layer portion, thereby improving the adhesion between the cleaning roller and the object by providing the inner layer portion, and the antifouling property and wear resistance by providing the outer layer portion. The effect of improving properties and the like can be obtained more remarkably.
  • the JIS-A hardness of the inner layer portion is preferably 15 ° or more and 70 ° or less, and the JIS-A hardness of the outer layer portion is preferably 50 ° or more.
  • the brush roller and the cleaning roller are charged, and the potentials of the first counter roller and the second counter roller are fixed potentials.
  • the brush roller and the cleaning roller are charged, and the potentials of the first counter roller and the second counter roller are set to fixed potentials. Since an electric field can be effectively formed between the two opposing rollers, both relatively large foreign matters and fine foreign matters can be more efficiently removed from the object.
  • rotation in the follower direction with respect to the movement direction of the object or the other roller is referred to as “rotation in the forward direction” and vice versa. This is called “reverse rotation”.
  • substantially vertical means that the angle of intersection with the vertical line is within ⁇ 10 °, and may be vertical.
  • substantially parallel means that the acute angle between two straight lines is greater than 0 ° and within 10 °, or parallel.
  • front side and back side of an object are merely distinguished for convenience and do not necessarily correspond to the front side and the back side when the object is used.
  • the cleaning device of the present invention can remove not only a relatively large foreign substance of a millimeter size but also a fine foreign substance, it can be suitably used for removing foreign substances such as dust adhering to the surface of a plate-like or film-like object. it can.
  • FIG. 2 is a schematic sectional view of the cleaning device shown in FIG. 1. It is typical sectional drawing of the brush roller of the cleaning apparatus shown in FIG. It is typical sectional drawing of the collection
  • FIG. 6 is a schematic cross-sectional view taken along line XX in FIG. 5. It is typical sectional drawing which shows an example of the height adjustment mechanism applicable to the cleaning apparatus which concerns on one Example of this invention. It is typical sectional drawing which shows 1 process of height adjustment using the height adjustment mechanism of FIG. It is a typical perspective view which shows the height adjustment mechanism of FIG.
  • FIG. It is typical sectional drawing of the cleaning roller of the cleaning apparatus shown in FIG. It is a typical perspective view which shows the unit side terminal applicable to the cleaning apparatus which concerns on one Example of this invention. It is a typical perspective view which shows the holder side terminal applicable to the cleaning apparatus which concerns on one Example of this invention. It is a typical sectional view showing a voltage application mechanism applicable to a cleaning device concerning one example of the present invention. It is typical sectional drawing of the cleaning apparatus different from FIG. It is a figure which shows the electrification row
  • the cleaning apparatus shown in FIGS. 1 and 2 removes foreign matters on the surface (front side surface S1 and back side surface S2) while transporting the flat object S in the transport direction D.
  • the cleaning device mainly includes a holder 1, an external transport mechanism (upstream-side external transport mechanism 2 ⁇ / b> A and downstream-side external transport mechanism 2 ⁇ / b> B), and a cleaning mechanism 3.
  • the object S is a flat plate member in FIG. 2, but is not particularly limited as long as it is a plate member or a film member. Specifically, the surface of the object may be flat as shown in FIG. 2, but a depression may be present. Furthermore, the object may have a hole or the like.
  • Examples of the plate-like object include an FPD glass substrate, a resin substrate, a printed circuit board for mounting electronic components, a ceramic green sheet for forming a multilayer ceramic capacitor, a resin thin plate, and the like.
  • An example of the film-like object is a resin film.
  • the average thickness of the object is not particularly limited, but the lower limit is preferably 30 ⁇ m, and more preferably 50 ⁇ m. If the average thickness of the object is less than the lower limit, it may be difficult to convey the object. On the other hand, the upper limit of the average thickness of the object is, for example, 5 mm.
  • the holder 1 holds the cleaning mechanism 3.
  • a pair of opposing plate-like members 10 are connected by a plurality of rods 11 and shafts 12.
  • the external transport mechanism applies a propulsive force for transport to the object S, and is provided outside the cleaning mechanism 3.
  • the external transport mechanism includes an upstream external transport mechanism 2A disposed upstream of the cleaning mechanism 3 in the transport direction, and a downstream external transport mechanism 2B disposed downstream of the cleaning mechanism 3 in the transport direction.
  • the conveyance speed of the object S by the external conveyance mechanism is not particularly limited as long as it is a range in which foreign matter can be removed from the object S by the cleaning mechanism 3.
  • the lower limit of the conveyance speed of the object S is preferably 5 m / min, and more preferably 10 m / min.
  • the upper limit of the conveyance speed of the object S is preferably 30 m / min, and more preferably 20 m / min. If the conveyance speed of the object S is less than the above lower limit, the time required for removing the foreign matter becomes long, and the foreign matter removal efficiency may be reduced. On the contrary, when the conveyance speed of the target S exceeds the upper limit, there is a possibility that the foreign matter on the surface of the target S cannot be sufficiently removed by the cleaning mechanism 3.
  • the upstream external transport mechanism 2A is for transporting the object S into the cleaning mechanism 3, and has a plurality of belt transport sections 20A.
  • the belt conveyance unit 20A is obtained by winding an endless belt 22A between a pair of rollers 21A that are spaced apart along the conveyance direction D. Of the pair of rollers 21A, one is a driving roller to which a rotational force is applied, and the other is a driven roller that rotates together with the endless belt 22A by the rotation of the driving roller.
  • the plurality of belt conveyance units 20A are arranged at regular intervals in a horizontal direction orthogonal to the conveyance direction D (hereinafter also referred to as “conveyance width direction”).
  • the downstream side external conveyance mechanism 2B carries out the object S from the cleaning mechanism 3, and has a plurality of belt conveyance units 20B.
  • the belt conveyance unit 20B has the same configuration as the plurality of belt conveyance units 20A of the upstream side external conveyance mechanism 2A. That is, the plurality of belt conveyance units 20B are configured such that the endless belt 22B is wound between a pair of rollers 21B configured by a driving roller and a driven roller that are arranged apart from each other in the conveyance direction D.
  • the plurality of belt conveyance units 20B are also arranged at regular intervals in the conveyance width direction.
  • the cleaning mechanism 3 is a mechanism capable of cleaning both the front side surface S1 and the back side surface S2 of the object S, and includes a front side cleaning mechanism 3A and a back side cleaning mechanism 3B.
  • the front side cleaning mechanism 3A is a unit that removes foreign matters on the front side surface S1 of the object S to be conveyed.
  • the front side cleaning mechanism 3 ⁇ / b> A includes a front side brush roller unit 4, a front side cleaning roller unit 5, and a back side opposing roller unit 6.
  • a front brush roller unit 4 and a front cleaning roller unit 5 are detachably mounted on a holder 1 installed on a floor base in a factory or the like.
  • the holder 1 may be fixed on the base by a fixing tool such as a screw, but is preferably placed in a movable state without using the fixing tool.
  • the front brush roller unit 4 and the front cleaning roller unit 5 are disposed above the object S to be transported (above the transport path) and are detachably held by the holder 1.
  • the front-side brush roller unit 4 is a unit that removes foreign matter on the front-side surface S1 of the object S with the brush roller 41 housed in the housing 40, and is suitable for removing relatively large foreign matters of millimeter size.
  • the housing 40 of the front side brush roller unit 4 accommodates a collection roller 42, a blade 43, a foreign matter collection unit 44, and a conveyance roller 45, and the whole is unitized. In this way, the front brush roller unit 4 is detachably united with the holder 1, so that the front brush roller unit 4 can be easily detached from the holder 1.
  • the unit when it is necessary to replace the brush roller 41 in accordance with the type of the object S or foreign matter, the unit can be replaced, so that effective foreign matter removal can be easily performed. Further, by removing the front side brush roller unit 4 from the holder 1, an opposing metal roller 60, which will be described later, facing the brush roller 41 is exposed and can be easily replaced and cleaned, so that it is excellent in maintainability. In addition, the maintenance of the brush roller 41 and the like housed in the housing 40 is also easier than in the case where the brush roller 41 is assembled and fixed in the holder 1.
  • the housing 40 accommodates the brush roller 41 and the like as a unit and is detachable from the holder 1.
  • the housing 40 includes an upstream plate and a downstream plate disposed so as to be substantially perpendicular to the conveyance surface, a pair of side plates that connect side ends of the upstream plate and the downstream plate, an upstream plate, A top plate connected to the upper end of the downstream plate and the pair of side plates; and a bottom plate connected to the lower end of the upstream plate, the downstream plate and the pair of side plates.
  • the top plate is provided with a pair of gripping portions 40A that are separated in the width direction. The pair of gripping portions 40A is used when the front brush roller unit 4 is attached or detached.
  • An opening 40B is provided in the bottom plate, and a tip end portion of brush bristles 41C of a brush roller 41 described later protrudes from the opening 40B.
  • casing 40 For example, stainless steel etc. are mentioned.
  • the brush roller 41 is a front-side brush roller that contacts the object S to be conveyed and removes foreign matter on the front-side surface S1, particularly relatively large foreign matter (for example, millimeter-size foreign matter).
  • the brush roller 41 is rotated in a reverse direction (clockwise direction in FIG. 2) with respect to the conveyance direction D by a rotation shaft that is substantially perpendicular to the conveyance direction D and substantially parallel to the conveyance surface by power from an external drive source. Driven by rotation.
  • the brush roller 41 is preferably driven to rotate in a reverse direction with respect to the conveyance direction D in a charged state, but may be driven to rotate in an uncharged state.
  • the brush roller 41 has a cylindrical core rod 41A and a plurality of brush bristles 41C implanted on the outer peripheral surface of the core rod 41A via an adhesive layer 41B.
  • the core rod 41A is formed of a conductive material such as a metal, a carbon material, or a synthetic resin composite material.
  • the upper limit of the volume resistivity of the conductive material is, for example, 10 5 ⁇ cm.
  • a voltage is applied to the core rod 41A by a voltage application mechanism such as an external power source described later.
  • the voltage applied to the core bar 41A is set to have the same polarity and a larger absolute value than the cleaning roller 51 of the front side cleaning roller unit 5 described later.
  • the lower limit of the voltage applied to the core rod 41A is preferably -800V, more preferably -600V.
  • the upper limit of the voltage is preferably -200V, more preferably -300V.
  • the brush bristles 41C are preferably those on which foreign substances are physically easily attached, and examples thereof include synthetic resin fibers. Moreover, as the bristle 41C, a material that can be charged with electric charge for adsorbing foreign matter adhering to the front surface S1 of the object S is preferable. For example, a conductive material such as carbon black, carbon fiber, metal powder, or metal whisker. A synthetic resin fiber-containing material can be suitably used.
  • the cross-sectional shape of the bristle 41C is not particularly limited, and examples thereof include a circular shape, an elliptical shape, and a star shape.
  • the outer shape of the brush bristle 41C is not particularly limited, and examples thereof include a straight line shape, a wave curve shape, and a shape formed by combining a curve and a straight line.
  • the brush bristles 41C are more likely to adsorb foreign matter as the surface area increases. Therefore, as the bristle 41C, it is possible to use one having a different cross-sectional shape capable of ensuring a large surface area, for example, a star shape.
  • the brush roller 41 is driven to rotate in the direction opposite to the conveyance direction D of the object S, thereby causing the adhering foreign matter on the front surface S1 of the object S to adhere to the brush hair 41C. Can do. Further, by applying a voltage to the brush roller 41 and charging it, an attracting force due to the electric field can be applied, and the foreign matter on the front surface S1 of the object S can be effectively attracted to the brush hair 41C. In particular, by charging the brush roller 41, even when the object S has a hole or a depression on the surface, the foreign matter in the hole or the depression can be efficiently removed. Furthermore, by applying a voltage in the above range to the core rod 41A, relatively large foreign matter can be more effectively attracted to the brush roller 41 from the front surface S1 of the object S.
  • the brush roller 41 of the front side brush roller unit 4 has the bristle 41C, rotates in the reverse direction with respect to the conveying direction D, and a voltage having the same polarity and larger absolute value than the cleaning roller 51 is applied. By doing so, a relatively large foreign substance of millimeter order can be removed from the front surface S1 of the object S.
  • the lower limit of the average pressure contact amount of the brush roller 41 to the object S is preferably 0.3 mm, and more preferably 0.5 mm.
  • the upper limit of the average pressure contact amount is preferably 1.5 mm, and more preferably 1 mm. If the average pressure contact amount is less than the lower limit, the foreign matter on the front surface S1 of the object S may not be sufficiently scraped. On the other hand, if the average pressure contact amount exceeds the upper limit, the resistance between the brush bristles 41C and the front surface S1 of the object S increases, so that the conveyance speed of the object S may decrease and the object. There is a risk of scratching the front surface S1 of S.
  • the “pressure contact amount” is the amount of brush hair 41 biting into the object S, and the minimum distance between the surface of the core bar 41A and the front surface S1 of the object S is calculated from the average length of the brush hair 41C. It means the difference value.
  • the lower limit of the peripheral speed of the brush roller 41 is preferably 1 m / min, and more preferably 2 m / min.
  • the upper limit of the peripheral speed of the brush roller 41 is preferably 30 m / min, and more preferably 15 m / min. If the peripheral speed of the brush roller 41 is less than the lower limit, the foreign matter on the front surface S1 of the object S may not be sufficiently scraped. Conversely, if the peripheral speed of the brush roller 41 exceeds the above upper limit, the resistance between the brush bristles 41C and the front surface S1 of the object S increases, and therefore the conveyance speed of the object S may decrease. The front surface S1 of the object S may be damaged.
  • the upper limit of the ratio (B / W) of the peripheral speed B of the brush roller 41 to the transport speed W of the object S is preferably 25%. If the peripheral speed B of the brush roller 41 is too large with respect to the conveyance speed W of the object S, it may be difficult to cause a relatively large foreign object to be scraped by the brush roller 41.
  • the collection roller 42 is a first collection roller that is substantially parallel to the brush roller 41 and is in contact with the brush bristles 41C, and collects foreign matter attached to the brush bristles 41C.
  • the collection roller 42 has a smaller diameter than the brush roller 41, and is disposed above the brush roller 41 and upstream of the brush roller 41 in the transport direction.
  • the collection roller 42 includes a roller main body 42A formed of a conductive material and a corrosion-resistant layer 42B laminated on the outer peripheral surface thereof.
  • the material of the roller body 42A is not particularly limited as long as it is a conductive material.
  • a metal material such as stainless steel, copper, or aluminum, or a conductive resin material in which a conductive material such as a conductive filler is blended into a synthetic resin, or the like.
  • metal materials are preferable.
  • the corrosion-resistant layer 42B can be a metal plating layer formed by a plating process such as nickel plating or gold plating.
  • the recovery roller 42 may be formed entirely of a conductive material that is difficult to oxidize, such as stainless steel, and does not have the corrosion-resistant layer 42B.
  • the collection roller 42 is rotated in the reverse direction (clockwise direction in FIG. 2) with respect to the brush roller 41 by the power from the external drive source while being charged by the external power source.
  • the lower limit of the magnification of the rotation speed of the collection roller 42 with respect to the rotation speed of the brush roller 41 is preferably 1.0.
  • the upper limit of the rotation speed magnification is preferably 1.5 times. Thereby, the foreign matter can be effectively moved from the brush roller 41 to the collection roller 42.
  • the rotation direction of the collection roller 42 may be a forward direction with respect to the brush roller 41.
  • the applied voltage to the recovery roller 42 is set to have the same polarity and higher absolute value than the applied voltage to the brush roller 41.
  • the lower limit of the absolute value of the difference between the voltage applied to the collection roller 42 and the voltage applied to the brush roller 41 is preferably 200V, and more preferably 300V.
  • the upper limit of the absolute value of the difference is preferably 600V, and more preferably 500V.
  • the lower limit of the voltage applied to the collecting roller 42 is preferably -1,500V, and more preferably -1,200V.
  • the upper limit of the applied voltage is preferably ⁇ 400V, more preferably ⁇ 600V.
  • the applied voltage to the collection roller 42 By making the applied voltage to the collection roller 42 have the same polarity and higher absolute value than the applied voltage to the brush roller 41, the potential of the outer peripheral surface of the collection roller 42 becomes the potential of the brush hair 41C of the brush roller 41. Therefore, the foreign matter attached to the brush roller 41 can be adsorbed to the outer peripheral surface of the collection roller 42.
  • the difference between the applied voltages of the collection roller 42 and the brush roller 41 is set in the above range, and the applied voltage to the collection roller 42 is set in the above range, so that the foreign matter attached to the brush roller 41 Can be adsorbed effectively.
  • the upper limit of the electrical resistance of the collection roller 42 is preferably 10 8 ⁇ .
  • the blade 43 is a first blade that scrapes and removes foreign matter from the collection roller 42.
  • the blade 43 is, for example, a rectangular plate member having elasticity.
  • the tip of the blade 43 is a free end, and the root is fixed to the blade support 43a.
  • a tip portion which is a free end of the blade 43 is in contact with the outer peripheral surface of the collection roller 42 in the axial direction of the collection roller 42.
  • the blade 43 is preferably in contact with the outer peripheral surface of the collection roller 42 in an inclined state.
  • the lower limit of the inclination angle between the blade 43 and the virtual tangent on the outer periphery of the collection roller 42 is preferably 5 °, and more preferably 15 °.
  • the upper limit of the tilt angle is preferably 30 °, more preferably 25 °.
  • the blade 43 When the angle is less than the lower limit, the foreign matter cannot be sufficiently scraped off by the blade 43 due to insufficient pressure contact force, and a retransfer phenomenon in which the foreign matter that has passed through the blade 43 reattaches to the object S may occur. There is.
  • the blade 43 when the inclination angle exceeds the upper limit, the blade 43 may be turned up due to the rotation of the collection roller 42. Accordingly, foreign matters can be effectively scraped off from the collection roller 42 by bringing the blade 43 into contact with the collection roller 42 so that the inclination angle falls within the above range. Further, the blade 43 is disposed upstream of the collection roller 42 in the transport direction, that is, above the transport roller 45.
  • the space above the conveyance roller 45 can be used effectively, and the front brush roller unit 4 can be reduced in size. Further, it is possible to improve the convenience by adopting a configuration in which a foreign substance collection unit 44 described later is pulled out to the upstream side in the conveyance direction.
  • the material of the blade 43 is not particularly limited, but preferably has elasticity, more preferably synthetic resin. Specifically, in order to impart appropriate elasticity, it may be formed of a synthetic resin such as a thermosetting polyurethane. Further, at least the tip of the blade 43 may be fluorine-coated with a fluorine-containing compound such as a fluorine resin in order to reduce friction with the collecting roller 42 that abuts.
  • the lower limit of the average thickness of the fluorine coating is preferably 5 ⁇ m.
  • the upper limit of the average thickness is preferably 15 ⁇ m. If the average thickness is less than the lower limit, the friction reducing effect is not sufficiently exhibited, and the blade 43 may be easily caught in the rotation of the collecting roller 42. On the other hand, when the average thickness exceeds the upper limit, the fluorine coating may be cracked.
  • the shape of the blade 43 is not limited to the rectangular plate shape of FIG. 2, and may be a shape bent or curved from the root portion to the tip portion.
  • the foreign matter collection unit 44 is a first foreign matter collection unit that collects and stores foreign matter scraped off from the collection roller 42 by the blade 43.
  • the foreign matter collection unit 44 is disposed below the tip of the blade 43 and upstream of the brush roller 41 in the transport direction.
  • recovery part 44 is engage
  • a grip 44A is provided on the upstream side of the foreign matter collection unit 44, and the foreign matter collection unit 44 can be easily taken in and out using the grip 44A.
  • recovery part 44 can be pulled out to the conveyance direction upstream, it can draw out with the front side brush roller unit 4 fixed to the holder 1, and can collect a foreign material, and is excellent in convenience.
  • the conveyance roller 45 guides the movement of the object S carried into the cleaning mechanism 3 together with an auxiliary roller 62 of the back side opposing roller unit 6 described later. Further, the transport roller 45 and the auxiliary roller 62 have a function for applying a propulsive force to the object S in order to allow the object S to enter under the brush roller 41 rotating in the reverse direction with respect to the transport direction D with an appropriate force. Also have.
  • the transport roller 45 is disposed so as to face an auxiliary roller 62 of the back side roller unit 6 described later. The transport roller 45 rotates in the forward direction (counterclockwise direction in FIG. 2) with respect to the transport direction D.
  • the transport roller 45 is disposed so as to press the auxiliary roller 62 with a force of about 0.49N.
  • the pressing force can be appropriately adjusted in consideration of the material and thickness of the object S.
  • the conveying roller 45 can be omitted from the cleaning device.
  • the transport roller 45 is a ring-shaped member that is stacked on the core shaft 45 ⁇ / b> A and the outer periphery of the core shaft 45 ⁇ / b> A, and is spaced apart along the axial direction of the core shaft 45 ⁇ / b> A.
  • a plurality of resin portions 45B As shown in FIGS. 5 and 6, the resin portion 45 ⁇ / b> B has irregularities on the outer peripheral surface.
  • the contact area of the conveyance roller 45 and the front side surface S1 of the target object S can be reduced by arranging the plurality of resin portions 45B having irregularities on the outer peripheral surface apart from each other. As a result, it is possible to suppress clogging of the object S between the transport roller 45 and the auxiliary roller 62 when the object S is carried into the cleaning mechanism 3.
  • the core shaft 45A is made of a metal such as stainless steel, copper, or aluminum.
  • the resin portion 45B is made of polyurethane or the like, for example. Examples of the polyurethane include acrylic mixed urethane and fluorine mixed urethane.
  • acrylic mixed urethane is a resin mainly composed of polyester polyurethane or polyether polyurethane, and is (1) a mixture of thermoplastic polyurethane and silicone-acrylic copolymer resin, (2) acrylic resin (for example, A mixture comprising a graft compound in which an aminoethyl group is grafted to a main chain comprising a methacrylic acid-methyl methacrylate copolymer) and a thermoplastic polyurethane, or (3) a mixture comprising an acrylic resin, a polyurethane and a fluorine-based surface coating agent. Means.
  • “Fluorine-mixed urethane” is a resin mainly composed of polyurethane, which means a mixture of thermoplastic polyurethane and urethane / fluorine copolymer.
  • the “main component” is a component having the largest content, for example, a component contained in an amount of 50% by mass or more.
  • the front brush roller unit 4 may be configured to be height adjustable by a height adjustment mechanism.
  • a height adjustment mechanism By adjusting the height of the front brush roller unit 4 by the height adjusting mechanism, the pressure contact amount of the brush roller 41 against the object S is adjusted, and the brush roller 41 removes relatively large foreign matters. It can be done more efficiently.
  • FIGS. 7 to 9 show an example of a state in which the front brush roller unit 4 is disposed on the plate-like member 10 of the holder 1 via the height adjusting mechanism of the front brush roller unit 4 (holder 1, height adjusting mechanism). And members other than the top plate 103 of the housing 40 of the front brush roller unit 4 are not shown).
  • the height adjusting mechanism shown in FIGS. 7 to 9 includes a substantially plate-like fixing member 101 fixed to the plate-like member 10 of the holder 1 and a horizontal surface that is placed on the upper surface of the fixing member 101 and extends in the transport direction D. It mainly includes a slide member 102 that can move and move up and down, and a cover 104 that covers the fixing member 101.
  • the top plate 103 of the front brush roller unit 4 is supported at its longitudinal end by the slide member 102 and moves up and down with the slide member 102.
  • the height adjusting mechanism shown in FIGS. 7 to 9 is further provided with a gauge fixed to the plate-like member 10 and capable of measuring the vertical position of the slide member 102 and the like, and an adjusting tool for fixing the horizontal position of the slide member 102. May be.
  • FIG. 7 shows a state in which the height of the front brush roller unit 4 is adjusted to a minimum.
  • 8 and 9 show a state in which the height of the front brush roller unit 4 is adjusted to be maximum.
  • a part of the upper surface of the fixing member 101 is formed with a slope whose height gradually increases from approximately the center in the transport direction D to the downstream side (right side in FIGS. 7 and 8).
  • the upper surface of the slide member 102 is a substantially horizontal surface, but a slope whose height gradually increases from the vicinity of the approximate center in the transport direction D to the downstream side is formed on a part of the lower surface.
  • the slope of the upper surface of the fixing member 101 and the slope of the lower surface of the slide member 102 have the same slope and are abutted. Therefore, by moving the slide member 102 horizontally along the conveyance direction D, the height can be raised and lowered while maintaining the upper surface of the slide member 102 in a substantially horizontal plane state.
  • the height of the top plate 103 supported by the slide member 102 (the distances L1 and L2 between the top surface of the top plate 103 and the upper end of the plate-like member 10) is changed, and the height of the top plate 103 is changed.
  • the front brush roller unit 4 can be adjusted to a desired height.
  • the height adjusting mechanism shown in FIGS. 7 to 9 can be arranged near the upper end of the holder 1, the space of the holder 1 can be used effectively and the workability at the time of height adjustment is excellent.
  • the method and structure of the height adjustment mechanism of the brush roller unit 4 are not limited to those shown in FIGS.
  • Other height adjustment methods include, for example, a method in which a spacer having a predetermined height is arranged at a fixed portion of the brush roller unit 4 in the holder 1, and a protrusion is provided on the front brush roller unit 4.
  • Examples include a method in which a rail-like member to be fitted is arranged on the holder 1 along the vertical direction so that the mounting height of the front brush roller unit 4 can be adjusted steplessly.
  • the front-side cleaning roller unit 5 is a unit that removes foreign matter on the front-side surface S1 of the object S with the cleaning roller 51 housed in the housing 50.
  • the housing 50 of the front side cleaning roller unit 5 mainly accommodates a brush roller 52, a recovery roller 53, a blade 54, and a foreign matter recovery unit 55, and is entirely unitized.
  • the front side cleaning roller unit 5 is suitable for removing fine foreign matters smaller than the millimeter size, and is detachably attached to the holder 1 at a position adjacent to the downstream side in the transport direction from the front side brush roller unit 4. .
  • the cleaning roller 51 is set so as to apply pressure from both sides of the object S together with the counter resin roller 61 to be described later in order to effectively move fine foreign matters to the surface thereof. Therefore, if the front side cleaning roller unit 5 is arranged on the upstream side of the front side brush roller unit 4, the cleaning roller 51 presses and compresses a relatively large foreign object against the object S, and the brush roller 41 also removes the foreign object. There is a risk of not being able to complete. Therefore, the front side cleaning roller unit 5 is preferably disposed on the downstream side of the front side brush roller unit 4.
  • the front side cleaning roller unit 5 is detachably united with the holder 1 so that the front side cleaning roller unit 5 can be easily detached from the holder 1.
  • the unit can be replaced, and effective foreign matter removal can be easily performed.
  • a counter resin roller 61 which will be described later, facing the cleaning roller 51 is exposed and can be easily replaced or cleaned, so that maintenance is excellent.
  • maintenance is facilitated by housing and housing the housing 50 as compared with a case where the cleaning roller 51 is assembled and fixed in the apparatus.
  • the case 50 accommodates the cleaning roller 51 and the like as a unit and can be attached to and detached from the holder 1. Similar to the front brush roller unit 4, the housing 50 includes an upstream plate, a downstream plate, a pair of side plates, a top plate, and a bottom plate. The top plate is provided with a pair of gripping portions 50A that are separated in the transport width direction. The pair of gripping portions 50 ⁇ / b> A is used when the front side cleaning roller unit 5 is attached or detached. An opening 50B is provided in the bottom plate, and a part of the cleaning roller 51 protrudes from the opening 50B. The downstream plate is bent from above to below.
  • casing 50 there is no restriction
  • the cleaning roller 51 removes foreign matter on the front surface S1 of the object S, in particular, relatively fine foreign matter (for example, foreign matter smaller than millimeter size), and is substantially perpendicular to the transport direction D with the outer peripheral surface charged. And it is rotationally driven in the forward direction (counterclockwise direction in FIG. 2) with respect to the conveyance direction D by a rotation axis substantially parallel to the conveyance surface.
  • the cleaning roller 51 has a core rod 51A, an inner layer portion 51B formed on the outer peripheral surface of the core rod 51A, and an outer layer portion 51C that covers the outer peripheral surface of the inner layer portion 51B. It is an elastic roller.
  • the core rod 51A is formed in a cylindrical shape from a conductive material.
  • the conductive material used for the core rod 51 ⁇ / b> A include a metal material, and specifically, stainless steel, copper, aluminum, and the like, similar to the roller main body 42 ⁇ / b> A of the recovery roller 42 of the front brush roller unit 4.
  • the inner layer portion 51B ensures a certain pressing force and nip width against the object S by the cleaning roller 51 and the counter resin roller 61 described later. That is, the inner layer portion 51B ensures a desired adhesion force and contact width with respect to the object S, and contributes to efficient removal of relatively fine foreign matters from the front surface S1.
  • a resin material having elasticity and conductivity is preferable, and a resin material containing a resin component such as polyurethane, silicone resin, natural rubber, and synthetic rubber and carbon is more preferable.
  • this polyurethane the same polyurethane as the polyurethane of the resin portion 45B of the above-described transport roller 45 is preferably used.
  • the inner layer portion 51B As a material for forming the inner layer portion 51B, a conductive elastomer containing polyester polyurethane and carbon black is more preferable. With these materials, the elasticity of the cleaning roller 51 is sufficiently ensured, and it is possible to prevent the foreign matter from being excessively pressed against the object S by the cleaning roller 51 and to suppress the reduction of the foreign matter removal efficiency.
  • the lower limit of the JIS-A hardness of the inner layer portion 51B is preferably 15 °. Further, the upper limit of the JIS-A hardness is preferably 70 °. Furthermore, the electrical resistance of the inner layer portion 51B is preferably 10 8 ⁇ or less.
  • the cleaning roller 51 is sufficiently elastic, and the foreign matter can be removed from the object S with the counter resin roller 61 of the back side counter roller unit 6 described later. An effective nip width can be ensured.
  • the outer layer portion 51C has a role of avoiding adverse effects due to moisture and the like while ensuring the antifouling property and wear resistance of the cleaning roller 51 without hindering the adhesion with the object S and the application of an appropriate surface potential.
  • any material may be used as long as it can be charged to adsorb foreign matter attached to the front surface S1 of the object S by the force of an electric field.
  • polyurethane such as acrylic mixed polyurethane or fluorine mixed polyurethane, , Silicone resin, natural rubber, synthetic rubber and the like. Among these, polyurethane is preferable.
  • the wear resistance is improved as compared with the case where it is formed with silicone resin, butyl rubber or the like, and contamination of the cleaning roller 51 due to the addition of a plasticizer or a low molecular weight compound is prevented. Can be reduced.
  • the outer layer portion 51C preferably has a higher hardness than the inner layer portion 51B.
  • the JIS-A hardness is preferably 50 ° or more. When the JIS-A hardness of the outer layer portion 51C is 50 ° or more, the wear resistance of the cleaning roller 51 can be sufficiently ensured.
  • acrylic mixed polyurethane As the material of the outer layer portion 51C, negatively charged foreign matter can be easily removed from the front surface S1 of the object S.
  • fluorine mixed polyurethane As the material of the outer layer portion 51C, the cleaning roller 51 can be easily charged negatively, and the positively charged foreign matter can be easily removed from the object S.
  • the cleaning roller 51 may entrain the object S when the thickness of the object S is thin. Therefore, in order to prevent the object S from being caught, it is preferable that minute protrusions are formed on the surface of the cleaning roller 51 (outer layer portion 51C).
  • a method for forming the microprotrusions a method of blending the particles serving as the bases of the microprotrusions into a resin material such as thermoplastic polyurethane used for forming the outer layer portion 51C is preferable.
  • the particles may be regular particles or irregular particles, but regular spherical particles are preferable from the viewpoint of uniforming the protruding shape of the microprojections.
  • the lower limit of the average particle diameter of the spherical particles is preferably 2 ⁇ m, and more preferably 2.5 ⁇ m.
  • the upper limit of the average particle diameter is preferably 5 ⁇ m, and more preferably 4.5 ⁇ m.
  • the lower limit of the coefficient of variation (CV value) obtained by dividing the standard deviation ( ⁇ ) related to the average particle size by the average particle size is preferably 3.0%, and 3.5% Is more preferable.
  • the upper limit of the coefficient of variation is preferably 5.0% and more preferably 4.5%.
  • the “average particle diameter” means a volume average particle diameter (Mv) obtained by a laser diffraction / scattering method.
  • the spherical particles are preferably harder than thermoplastic polyurethane.
  • the spherical particles are preferably made of resin since they may damage the object S if they are excessively hard like glass beads or ceramic beads.
  • a melamine resin, an acrylic resin, etc. are mentioned, for example, Among these, a melamine resin is preferable.
  • the lower limit of the average thickness of the outer layer portion 51C is preferably 2 ⁇ m and more preferably 5 ⁇ m.
  • the upper limit of the average thickness of the outer layer portion 51C is preferably 500 ⁇ m, and more preferably 300 ⁇ m. If the average thickness of the outer layer portion 51C is less than the lower limit, the surface of the cleaning roller 51 cannot be sufficiently charged, and there is a possibility that a foreign matter adsorption effect cannot be sufficiently obtained. On the contrary, if the average thickness of the outer layer portion 51C exceeds the upper limit, good charging characteristics for adsorbing foreign matter may not be obtained.
  • the cleaning roller 51 is charged by applying a voltage from an external power source, and is given a surface potential (surface charge). That is, the cleaning roller 51 is in contact with the front surface S1 of the object S with the surface charged, and adsorbs and removes relatively fine foreign matter adhering to the front surface S1 of the object S by the force of the electric field. . In this way, by charging the cleaning roller 51, even when the object S has a hole or a depression on the surface, the foreign matter in the hole or the depression can be efficiently removed.
  • the applied voltage to the cleaning roller 51 has the same polarity and lower absolute value than the applied voltage to the brush roller 41 of the front side brush roller unit 4.
  • the lower limit of the voltage applied to the cleaning roller 51 is, for example, ⁇ 400V, and preferably ⁇ 200V.
  • the applied voltage is, for example, less than 0V and is preferably ⁇ 50V or less. In this way, by applying the voltage applied to the cleaning roller 51 to the same polarity and lower in absolute value than the voltage applied to the brush roller 41 of the front side brush roller unit 4, relatively fine foreign matter is removed from the object S. Can be removed from the front surface S1.
  • the upper limit of the electrical resistance of the cleaning roller 51 is preferably 10 8 ⁇ . Since the electrical resistance of the cleaning roller 51 is 10 8 ⁇ or less, the cleaning roller 51 can be effectively charged when a voltage is applied.
  • the cleaning roller 51 is set to a height at which an appropriate pressure can be applied to the object S between the cleaning roller 51 and the counter resin roller 61 in order to increase the collection efficiency of fine foreign matters.
  • the pressure applied to the object S by the cleaning roller 51 and the counter resin roller 61 can be, for example, a linear pressure of 2.4 kg / 250 mm.
  • 250 mm is the axial length of the outer layer portion 51C of the cleaning roller 51 in the present embodiment.
  • the cleaning roller 51 also has a function of giving an appropriate driving force to the object S together with the counter resin roller 61. Thereby, it becomes easy to make the target object S enter below the brush roller 71 of the back side brush roller unit 7 which will be described later rotating in the reverse direction with respect to the transport direction D.
  • the brush roller 52 collects foreign matter removed from the object S by the cleaning roller 51, and is disposed so as to be substantially parallel to and in contact with the cleaning roller 51 immediately above the cleaning roller 51.
  • the brush roller 52 is rotationally driven in the counterclockwise direction (counterclockwise direction in FIG. 2) with respect to the cleaning roller 51 in a charged state by power from an external drive source.
  • Such a brush roller 52 has a cylindrical core rod 52A and a plurality of brush bristles 52C implanted on the outer peripheral surface of the core rod 52A via an adhesive layer 52B (see FIG. 3).
  • the details are the same as the core rod 41A and the bristle 41C of the brush roller 41 of the front side brush roller unit 4, and therefore, the duplicated explanation is omitted.
  • the voltage applied to the brush roller 52 (voltage applied to the core rod 52A) is set to have the same polarity and higher absolute value than the voltage applied to the cleaning roller 51.
  • the lower limit of the voltage applied to the brush roller 52 is preferably ⁇ 800 V, more preferably ⁇ 600 V, like the brush roller 41 of the front brush roller unit 4.
  • the upper limit of the applied voltage is preferably -200V, more preferably -300V.
  • the collection roller 53 is a second collection roller that collects the foreign matter collected by the brush roller 52 from the cleaning roller 51, and is disposed above the brush roller 52 so as to be substantially parallel to the brush roller 52 and in contact with the brush bristles 52C. Is done.
  • the collection roller 53 is rotationally driven in the counterclockwise direction (counterclockwise direction in FIG. 2) with respect to the brush roller 52 by power from an external drive source in a charged state. Since the details of the collection roller 53 can be the same as those of the collection roller 42 of the front brush roller unit 4 described above, a duplicate description is omitted.
  • the applied voltage to the collection roller 53 is set to have the same polarity and higher absolute value than the applied voltage to the brush roller 52.
  • the lower limit of the absolute value of the difference between the voltage applied to the collection roller 53 and the voltage applied to the brush roller 52 is preferably 200V, and more preferably 300V.
  • the upper limit of the absolute value of the difference is preferably 600V, and more preferably 500V.
  • the lower limit of the voltage applied to the collection roller 53 is preferably -1,500V, and more preferably -1,200V.
  • the upper limit of the applied voltage is preferably ⁇ 400V, more preferably ⁇ 600V.
  • the applied voltage to the collection roller 53 By making the applied voltage to the collection roller 53 have the same polarity and higher absolute value than the applied voltage to the brush roller 52, the potential of the outer peripheral surface of the collection roller 53 becomes the potential of the brush bristles 52C of the brush roller 52. Therefore, the foreign matter attached to the brush roller 52 can be attracted to the outer peripheral surface of the collection roller 53.
  • the difference in applied voltage between the collection roller 53 and the brush roller 52 is set in the above range, and the applied voltage to the collection roller 53 is set in the above range, so that the foreign matter attached to the brush roller 52 can be removed from the outer peripheral surface of the collection roller 53. Can be adsorbed effectively.
  • the collection roller 53 is disposed downstream of the brush roller 52 in the transport direction. Thereby, even if the collection roller 53 has a smaller diameter than the brush roller 52, the foreign material can be scraped to the downstream side in the transport direction by the blade 53 described later, and re-adsorption of the foreign material to the brush roller 52 can be suppressed.
  • the rotation direction of the collection roller 53 may be either a forward direction or a reverse direction with respect to the brush roller 52, and may be a rotation direction in which foreign matter is easily collected from the outer peripheral surface by a blade 54 described later.
  • the rotation direction of the collection roller 53 is the reverse direction (counterclockwise direction in FIG. 2) with respect to the brush roller 52 as shown in FIG. ing.
  • the lower limit of the magnification of the rotation speed of the collection roller 53 with respect to the rotation speed of the brush roller 52 is preferably 1.0.
  • the upper limit of the rotation speed magnification is preferably 1.5 times. Thereby, the foreign matter can be effectively moved from the brush roller 52 to the collection roller 53.
  • the blade 54 is a second blade that scrapes foreign matter from the collection roller 53.
  • the details of the blade 54 and the blade support portion 53a that supports the blade 54 are the same as those of the blade 43 and the blade support portion 43a of the front brush roller unit 4 described above.
  • the foreign matter collection unit 55 collects and stores foreign matter scraped off from the collection roller 53 by the blade 54.
  • the foreign matter collection unit 55 is disposed below the tip of the blade 54 and downstream of the brush roller 52 in the transport direction. And the foreign material collection
  • a gripping portion 55A is provided on the downstream side of the foreign matter collection unit 55, and the foreign matter collection unit 55 can be easily put in and out using the gripping portion 55A.
  • the foreign matter collection unit 55 can be pulled out downstream in the transport direction, the foreign matter can be collected by pulling out the cleaning roller unit 5 while being fixed to the holder 1.
  • the front cleaning roller unit 5 may be configured to be height adjustable by a height adjustment mechanism. In this way, by adjusting the height of the front cleaning roller unit 5 with the height adjusting mechanism, the pressing force (nip width) of the cleaning roller 51 against the object S is adjusted, and as a result, fine foreign matter is removed. It can be done efficiently.
  • the height adjusting mechanism of the front side cleaning roller unit 5 for example, a mechanism similar to that exemplified as the height adjusting mechanism of the front side brush roller unit 4 can be used.
  • the front brush roller unit 4 and the front cleaning roller unit 5 are both detachable, it is possible to provide a height adjusting mechanism independently for each unit. Therefore, in the cleaning device, the optimum pressure contact condition to the object S by the brush roller 41 of the front side brush roller unit 4 and the optimum pressure contact condition to the object S by the cleaning roller 51 of the front side cleaning roller unit 5 are different. Even in the case, the respective pressure contact states can be optimized.
  • the back side opposing roller unit 6 defines the transport path of the object S together with the brush roller 41 of the front side brush roller unit 4 and the cleaning roller 51 of the front side cleaning roller unit 5, and the back side of the object S (below the transport path) ).
  • the back-side counter roller unit 6 mainly includes a pair of counter rollers and an auxiliary roller 62 including a counter metal roller 60 that is a first back-side counter roller and a counter resin roller 61 that is a second back-side counter roller. . It is preferable that the back side opposing roller unit 6 is detachably attached to the holder 1 from the viewpoint of maintainability.
  • the first opposing roller holding the object S on its lower surface has a higher hardness.
  • the opposed metal roller 60 is a relatively hard metal roller, the brush hair 41C of the brush roller 41 of the front brush roller unit 4 is appropriately brought into contact with the object S to be relatively large from the front surface S1. Foreign matter can be effectively removed.
  • the cleaning roller 51 needs to apply an appropriate pressure to the object S with the second counter roller in order to efficiently adsorb fine foreign matters on the surface. May be difficult to recover by crimping to the object S.
  • the opposing resin roller 61 is an elastic resin roller (elastic roller), so that an appropriate pressure is applied to the object S with the cleaning roller 51 of the front-side cleaning roller unit 5 to improve adhesion, Since a suitable nip width can be ensured, fine foreign matters can be efficiently removed from the front surface S1 of the object S by the cleaning roller 51.
  • the opposed metal roller 60 is opposed to the brush roller 41 of the front brush roller unit 4 through the object S, and is disposed directly below the brush roller 41 so as to contact the object S. Laura.
  • the counter metal roller 60 is rotationally driven in a forward direction (clockwise direction in FIG. 2) with respect to the conveyance direction D of the object S. That is, the opposed metal roller 60 is driven to rotate in the reverse direction with respect to the brush roller 41 of the front brush roller unit 4.
  • the details of the counter metal roller 60 are the same as those of the recovery roller 42 of the front brush roller unit 4.
  • the opposed metal roller 60 is electrically grounded without being connected to an external power source, and thus an electric field suitable for removing foreign substances can be generated when the brush roller 41 is charged.
  • the surface of the opposing metal roller 60 may be coated with urethane resin or the like in order to prevent the back surface S2 of the object S from being damaged.
  • the electric resistance of the counter metal roller 60 is preferably 108 ⁇ or less.
  • the electric resistance of the counter metal roller 42 is 108 ⁇ or less, the counter metal roller 42 is easily grounded electrically.
  • the brush roller 41 needs to control the amount of biting of the brush into the object S accurately.
  • the first back side facing roller is not necessarily a metal roller, and a conductive resin roller or the like may be used.
  • the counter resin roller 61 is disposed directly below the cleaning roller 51 so as to face the cleaning roller 51 of the front-side cleaning roller unit 5 through the object S and to contact the object S.
  • the counter resin roller 61 is rotationally driven in a forward direction (clockwise direction in FIG. 2) with respect to the conveyance direction D of the object S. That is, the counter resin roller 61 is rotationally driven in the forward direction with respect to the cleaning roller 51.
  • the details of the counter resin roller 61 are substantially the same as the cleaning roller 51 of the front side cleaning roller unit 5.
  • the counter resin roller 61 it is preferable to blend titanium oxide, barium titanate, or the like as particles serving as the elements of the fine protrusions used for forming the fine protrusions.
  • titanium oxide, barium titanate, or the like as the particles, the density of the fine protrusions is increased, and the object S can be appropriately conveyed.
  • the counter resin roller 61 is electrically grounded without being connected to an external power source, and an electric field suitable for removing foreign substances can be generated between the counter resin roller 61 and the charged cleaning roller 51.
  • the cleaning roller 51 is set so as to apply an appropriate pressure to the object S between the cleaning roller 51 and the opposing resin roller 61 in order to increase the collection efficiency of fine foreign matters. If this pressure is too weak, the cleaning roller 51 and the counter resin roller 61 may not be able to provide a sufficient driving force for causing the object S to enter the brush roller 71 of the back side brush unit 7, which is strong. If the amount is too large, the foreign matter may be pressed against the object S to be fixed and cannot be collected. Therefore, in order to adjust this pressure, an elastic body or the like may be used so that the counter resin roller 61 can be pressed in the direction of the cleaning roller 51.
  • the auxiliary roller 62 guides the movement of the object S carried into the cleaning mechanism 3 by the upstream external transport mechanism 2 ⁇ / b> A together with the transport roller 45 of the front brush roller unit 4.
  • the layer structure and the like of the auxiliary roller 62 can be the same as that of the counter resin roller 61.
  • the back side cleaning mechanism 3B removes foreign matter on the back side surface S2 of the object S.
  • the back side cleaning mechanism 3B is generally configured to be upside down with respect to the front side cleaning mechanism 3A, and has a back side brush roller unit 7, a back side cleaning roller unit 8, and a front side counter roller unit 9.
  • the back-side brush roller unit 7 removes foreign matter on the back-side surface S2 of the object S with the brush roller 71. From the back-side counter roller unit 6 of the front-side cleaning mechanism 3A on the back side of the object S (below the conveyance path). Is also arranged adjacent to the downstream side in the transport direction.
  • the back brush roller unit 7 mainly includes a brush roller 71, a collection roller 72, and a blade 73, and the basic configuration thereof is the same as that of the front brush roller unit 4 of the front cleaning mechanism 3A. However, the back-side brush roller unit 7 differs from the front-side brush roller unit 4 in that members corresponding to the transport roller 45 and the foreign material collecting unit 44 are not provided.
  • the reason why the member corresponding to the transport roller 45 is not provided in the back brush roller unit 7 is that the brush roller 71 is driven to rotate in the reverse direction with respect to the transport direction D but transports more than the brush roller 71. This is because the cleaning roller 51 and the counter resin roller 61 arranged upstream in the direction give the object S an appropriate propulsive force for the brush roller 71 to enter downward.
  • the back brush roller unit 7 is not provided with a member corresponding to the foreign matter collecting part 44, but the bottom part is open so that foreign matter can be discharged out of the unit.
  • the foreign matter discharged from the back side brush roller unit 7 is collected by the foreign matter collecting unit 13 provided at the bottom of the holder 1 together with the foreign matter discharged from the back side cleaning roller unit 8 described later.
  • the back brush roller unit 7 is preferably detachably attached to the holder 1 from the viewpoint of maintainability.
  • the brush roller 71 is in contact with the back surface S2 of the object S in a charged state, and is driven to rotate in the counterclockwise direction (counterclockwise direction in FIG. 2) with respect to the conveyance direction D of the object S.
  • This is a back-side brush roller for removing a relatively large foreign material having a millimeter size on the back-side surface S2 of the object S.
  • Such a brush roller 71 has a cylindrical core rod 71A and a plurality of brush bristles 71C implanted on the outer peripheral surface of the core rod 71A via an adhesive layer 71B (see FIG. 3).
  • the voltage applied to the brush roller 71 (voltage applied to the core rod 71A) has the same polarity and higher absolute value than the voltage applied to the cleaning roller 80 of the back side cleaning roller unit 8 described later.
  • the lower limit of the voltage applied to the brush roller 71 is preferably ⁇ 800 V, more preferably ⁇ 600 V, like the brush roller 41 of the front brush roller unit 4.
  • the upper limit of the applied voltage is preferably -200V, more preferably -300V.
  • the brush roller 71 is preferably driven to rotate in the reverse direction of the cleaning roller 80 in a charged state, but may be driven to rotate without being charged.
  • the collection roller 72 is a third collection roller for collecting the foreign matter removed by the brush roller 71 from the back side surface S2 of the object S.
  • the collection roller 72 is substantially parallel to the brush roller 71 below the brush roller 71 and contacts the brush bristles 71C. Arranged in contact.
  • the collection roller 72 is rotationally driven in the counterclockwise direction (counterclockwise direction in FIG. 2) with respect to the brush roller 71 by power from an external drive source in a charged state. Since the details of the collection roller 72 can be the same as those of the collection roller 42 of the front brush roller unit 4 described above, a duplicate description is omitted.
  • the applied voltage to the collection roller 72 is set to have the same polarity and higher absolute value than the applied voltage to the brush roller 71.
  • the lower limit of the absolute value of the difference between the voltage applied to the collection roller 72 and the voltage applied to the brush roller 71 is preferably 200V, and more preferably 300V.
  • the upper limit of the absolute value of the difference is preferably 600V, and more preferably 500V.
  • the lower limit of the voltage applied to the collecting roller 72 is preferably -1,500V, and more preferably -1,200V.
  • the upper limit of the applied voltage is preferably ⁇ 400V, more preferably ⁇ 600V.
  • the applied voltage to the collection roller 72 By making the applied voltage to the collection roller 72 have the same polarity and higher absolute value than the applied voltage to the brush roller 71, the potential of the outer peripheral surface of the collection roller 72 becomes the potential of the brush bristle 71C of the brush roller 71. Therefore, the foreign matter adhering to the brush roller 71 can be adsorbed to the outer peripheral surface of the collection roller 72.
  • the difference in applied voltage between the collection roller 72 and the brush roller 71 within the above range and further setting the voltage applied to the collection roller 72 within the above range, foreign matter adhering to the brush roller 71 can be removed from the outer peripheral surface of the collection roller 72. Can be adsorbed effectively.
  • the rotation direction of the collection roller 72 may be either the forward direction or the reverse direction with respect to the brush roller 71, and may be driven in a rotation direction in which foreign matter on the outer peripheral surface is easily collected by a blade 73 described later. .
  • the rotation direction of the collection roller 72 is the reverse direction (counterclockwise direction in FIG. 2) with respect to the brush roller 71 as shown in FIG. ing.
  • the lower limit of the magnification of the rotation speed of the collection roller 72 relative to the rotation speed of the brush roller 71 is preferably 1.0.
  • the upper limit of the rotation speed magnification is preferably 1.5 times. Thereby, the foreign matter can be effectively moved from the brush roller 71 to the collection roller 72.
  • the blade 73 is a third blade that scrapes foreign matter from the collection roller 72.
  • the details of the blade 73 and the blade support portion 73a that supports the blade 73 are the same as those of the blade 43 and the blade support portion 43a of the front-side brush roller unit 4 of the front-side cleaning mechanism 3A.
  • the back side cleaning roller unit 8 is for removing fine foreign matter on the back side surface S2 of the object S by the cleaning roller 80, and in the back side of the object S (below the transport path) in the transport direction than the back side brush roller unit 7. Adjacent to the downstream side.
  • the back side cleaning roller unit 8 mainly includes a cleaning roller 80, a brush roller 81, a collection roller 82, a blade 83, and a transport roller 85, and the basic configuration thereof is the front side cleaning roller unit 5 of the front side cleaning mechanism 3A. It is the same.
  • the back-side brush roller unit 7 differs from the front-side brush roller unit 4 in that the back-side brush roller unit 7 has a conveying roller 85 and a member corresponding to the foreign matter collecting unit 55 is not provided.
  • the back-side brush roller unit 7 is not provided with a member corresponding to the foreign matter collecting unit 55, but has a bottom portion that is open so that foreign matter can be discharged out of the unit.
  • the foreign matter discharged from the back side cleaning roller unit 8 is collected together with the foreign matter discharged from the back side brush roller unit 7 by the foreign matter collecting unit 13 provided at the lowermost part of the holder 1.
  • the back side cleaning roller unit 8 is preferably detachably attached to the holder 1 from the viewpoint of maintainability.
  • the cleaning roller 80 is a back side cleaning roller that removes fine foreign matters on the back side surface S2 of the object S, and is disposed on the back side of the object S (below the conveyance path).
  • the cleaning roller 80 is rotationally driven in a forward direction (clockwise direction in FIG. 2) with respect to the conveyance direction D by a rotation axis that is substantially perpendicular to the conveyance direction D and substantially parallel to the conveyance surface with the outer peripheral surface charged.
  • the Since the details of the cleaning roller 80 can be the same as those of the cleaning roller 51 of the front-side cleaning roller unit 5 described above, a duplicate description is omitted.
  • the applied voltage to the cleaning roller 80 has the same polarity and lower absolute value than the applied voltage to the brush roller 71 of the back side brush roller unit 7.
  • the lower limit of the voltage applied to the cleaning roller 80 is, for example, ⁇ 400V, and preferably ⁇ 200V.
  • the applied voltage is, for example, less than 0V and preferably ⁇ 50V or less.
  • the voltage applied to the cleaning roller 80 has the same polarity and lower absolute value than the voltage applied to the brush roller 71 of the back brush roller unit 7, so that relatively fine foreign matter can be removed from the object. It can be removed from the backside surface S2 of S.
  • by setting the voltage applied to the cleaning roller 80 within the above range relatively fine foreign matter can be efficiently removed from the back surface S2 of the object S.
  • the brush roller 81 collects fine foreign matter removed by the cleaning roller 80 from the back surface S2 of the object S, and is disposed below the cleaning roller 80 in contact with the cleaning roller 80.
  • the brush roller 81 is rotationally driven in a reverse direction (clockwise direction in FIG. 2) with respect to the cleaning roller 80 by a rotation shaft that is substantially perpendicular to the conveyance direction D and substantially parallel to the conveyance surface.
  • This brush roller 81 has a plurality of brush bristles 81C planted on a core rod 81A via an adhesive layer 81B in the same manner as the brush roller 41 of the front brush roller unit 4 described above. The same as the brush roller 41 of the unit 4.
  • the applied voltage to the brush roller 81 (voltage applied to the core rod 81A) is set to have the same polarity and higher absolute value than the applied voltage to the cleaning roller 80.
  • the lower limit of the voltage applied to the brush roller 81 is preferably ⁇ 800 V, more preferably ⁇ 600 V, similarly to the brush roller 41 of the front brush roller unit 4.
  • the upper limit of the applied voltage is preferably -200V, more preferably -300V.
  • the collection roller 82 is a fourth collection roller that collects fine foreign matter collected by the brush roller 81 from the cleaning roller 80.
  • the collection roller 82 is arranged below the brush roller 81 and substantially parallel to the brush roller 81 and in contact with the brush bristles 81C. Established.
  • the collection roller 82 is rotationally driven in a reverse direction (clockwise direction in FIG. 2) with respect to the brush roller 81 by power from an external drive source in a charged state. Since the details of the collection roller 82 can be the same as those of the collection roller 42 of the front brush roller unit 4 described above, a duplicate description is omitted.
  • the applied voltage to the collection roller 82 is set to have the same polarity and higher absolute value than the applied voltage to the brush roller 81.
  • the lower limit of the absolute value of the difference between the voltage applied to the collection roller 82 and the voltage applied to the brush roller 81 is preferably 200V, and more preferably 300V.
  • the upper limit of the absolute value of the difference is preferably 600V, and more preferably 500V.
  • the lower limit of the voltage applied to the collection roller 82 is preferably -1,500V, and more preferably -1,200V.
  • the upper limit of the applied voltage is preferably ⁇ 400V, more preferably ⁇ 600V.
  • the applied voltage to the collection roller 82 By making the applied voltage to the collection roller 82 have the same polarity and higher absolute value than the applied voltage to the brush roller 81, the potential of the outer peripheral surface of the collection roller 82 becomes the potential of the brush hair 81C of the brush roller 81. Therefore, the foreign matter attached to the brush roller 81 can be attracted to the outer peripheral surface of the collection roller 82.
  • the difference in applied voltage between the collection roller 82 and the brush roller 81 within the above range, and further setting the voltage applied to the collection roller 82 within the above range the foreign matter attached to the brush roller 81 can be removed from the outer peripheral surface of the collection roller 82. Can be adsorbed effectively.
  • the rotation direction of the collection roller 82 may be either a forward direction or a reverse direction with respect to the brush roller 81, and may be driven in a rotation direction in which foreign matter is easily collected from the outer peripheral surface by a blade 83 described later. .
  • the collection roller 82 is rotated in the reverse direction (clockwise direction in FIG. 2) with respect to the brush roller 81 as shown in FIG. Yes.
  • the lower limit of the magnification of the rotation speed of the collection roller 82 relative to the rotation speed of the brush roller 81 is preferably 1.0.
  • the upper limit of the rotation speed magnification is preferably 1.5 times. Thereby, the foreign matter can be effectively moved from the brush roller 81 to the collection roller 82.
  • the blade 83 is a fourth blade that scrapes foreign matter from the collection roller 81.
  • the details of the blade 83 and the blade support portion 83a that supports the blade 83 are the same as those of the blade 43 and the blade support portion 43a of the front-side brush roller unit 4 of the front-side cleaning mechanism 3A.
  • the transport roller 85 guides the transport of the object S, and is disposed downstream of the cleaning roller 800 in the transport direction. As this conveyance roller 85, the thing similar to the opposing resin roller 61 is used suitably.
  • the front-side counter roller unit 9 defines the transport path of the object S together with the brush roller 71 of the back-side brush roller unit 7 and the cleaning roller 80 of the back-side cleaning roller unit 8, and the front side of the object S (above the transport path) ).
  • the front-side counter roller unit 9 mainly includes a casing 90, a counter-metal roller 91 that is a first front-side counter roller, and a counter-resin roller 92 that is a second front-side counter roller. It is detachably arranged.
  • a front-side facing roller unit 9 is detachably disposed on an apparatus body fixedly installed on a ground base such as a factory.
  • the front side opposing roller unit 9 is detachably attached to the holder 1, so that the front side opposing roller unit 9 can be easily detached from the holder 1, and the brush roller 71 and the back side cleaning roller unit 8 of the back side brush roller unit 7.
  • the cleaning roller 80 can be exposed. Therefore, since the brush roller 71 and the cleaning roller 80 can be easily replaced and cleaned, the maintenance is excellent.
  • maintenance of the counter metal roller 91 and the counter resin roller 92 housed in the housing 90 is facilitated as compared with the case of being assembled and fixed in the holder 1.
  • the housing 90 accommodates the opposing metal roller 91 and the opposing resin roller 92 as a unit and can be attached to and detached from the holder 1.
  • a pair of gripping portions 90 ⁇ / b> A are provided on the top plate of the housing 90 so as to be separated in the horizontal direction perpendicular to the transport direction D.
  • the pair of gripping portions 90A are used when the front side opposing roller unit 9 is attached or detached.
  • the casing 90 is provided with an opening 90B in the bottom plate, and a part of the counter metal roller 91 and the counter resin roller 92 protrude from the opening 90B.
  • casing 90 there is no restriction
  • the opposing metal roller 91 is disposed directly above the brush roller 71 so as to face the brush roller 71 of the back-side brush roller unit 7 via the object S and to contact the object S.
  • the counter metal roller 91 is driven to rotate, and rotates counterclockwise (counterclockwise in FIG. 2) with respect to the brush roller 71 of the back brush roller unit 7.
  • the details of the counter metal roller 91 are the same as those of the recovery roller 42 of the front brush roller unit 4.
  • the opposed metal roller 91 is electrically grounded without being connected to an external power source, and an electric field suitable for removing foreign matter can be generated between the opposed metal roller 91 and the brush roller 71.
  • the opposed metal roller 91 is a relatively hard metal roller, the brush bristles 71C of the brush roller 71 of the back side brush roller unit 7 can be appropriately brought into contact with the object S. A relatively large foreign matter can be effectively removed from the back side surface S2 of S.
  • the counter resin roller 92 is disposed directly above the cleaning roller 80 so as to face the cleaning roller 80 of the back side cleaning roller unit 8 through the object S and to contact the object S.
  • the counter resin roller 92 is driven to rotate and rotates in the forward direction (counterclockwise direction in FIG. 2) with respect to the cleaning roller 80.
  • the details of the counter resin roller 92 are the same as those of the counter resin roller 61 of the front counter roller unit 6.
  • the counter resin roller 92 is electrically grounded without being connected to an external power source, and an electric field suitable for removing foreign substances can be generated between the counter resin roller 92 and the cleaning roller 80.
  • the opposing resin roller 92 is a resin roller having elasticity, a suitable nip width can be secured between the counter roller 92 and the cleaning roller 80 of the back side cleaning roller unit 8, so that the adhesion between the cleaning roller 80 and the object S is improved.
  • the cleaning roller 80 can effectively remove fine foreign matters from the back surface S2 of the object S. It is to be noted that, similarly to the front-side cleaning mechanism 3A, the back-side brush roller unit 7 and the back-side cleaning roller unit 8 of the back-side cleaning mechanism 3B are provided with height adjustment mechanisms for adjusting the respective heights.
  • the collection rollers 42, 53, 72, and 82, the cleaning rollers 51 and 80, and the outer peripheral surfaces of the brush rollers 52 and 81 are preferably charged, and the brush rollers 41 and 71 are also preferably charged.
  • the auxiliary roller 62, the opposing metal rollers 60 and 91, and the opposing resin rollers 61 and 92 are preferably electrically grounded.
  • a charging circuit for charging or electrically grounding (including fixing to 0 V) these rollers a known circuit can be used.
  • this charging circuit is a circuit when, for example, a current of 500 ⁇ A is used as a threshold and a current exceeding the threshold flows.
  • a mechanism for example, a fuse
  • FIG. 11 the unit side terminal 110 arrange
  • FIG. 12 shows the holder-side terminal 120 disposed on the inner surface of the holder 1.
  • the unit-side terminal 110 in FIG. 11 surrounds two unit-side metal plates 111 arranged in parallel along an axis Z parallel to the transport direction D, and each unit-side metal plate 111 in a plan view. Two covers 112 are mainly provided.
  • the unit side metal plate 111 is electrically connected to a roller included in each unit via a wiring (not shown). Note that the number of the unit-side metal plates 111 included in the unit-side terminal 110 of FIG. 11 is two, but the number of the unit-side metal plates 111 can be appropriately changed according to the number of rollers of each unit. Further, the shape of the cover 112 can be changed as appropriate according to the number of unit-side metal plates 111 and the like.
  • the holder-side terminal 120 of FIG. 12 is disposed on the base 121 formed of an insulating member and the upper surface of the base 121, and the above-mentioned unit-side metal plate 111 can be inserted from above, and the inserted unit side
  • the holder side metal plate 122 is electrically connected to an external power source or the like via a wiring or the like (not shown).
  • the two surrounding portions 123 are configured such that their outer surfaces can come into contact with the inner surface of the cover 112 of the unit-side terminal 110.
  • the number of holder-side metal plates 122 and the shape of the surrounding portion 123 of the holder-side terminal 120 of FIG. 12 can be appropriately changed according to the number of unit-side metal plates 111 in the unit-side terminal 110, the shape of the cover 112, and the like. It is.
  • each unit-side metal plate 111 of the unit-side terminal 110 is inserted into the holder-side metal plate 122 of each holder-side terminal 120 so that both the metal plates are electrically connected, and the unit-side terminal 110
  • the cover 112 and the surrounding portion 123 are fitted so that the cover 112 covers the surrounding portion 123.
  • both terminals can be easily connected and the connected both terminals can be firmly connected. Can be fixed.
  • the unit-side terminal 110 and the holder-side terminal 120 in the cleaning device it is possible to easily and electrically connect at the same time as each unit is mounted, so that convenience can be improved and a strong connection is achieved. Since the structure can be formed, it is easy to keep the voltage applied to each roller constant even if vibration or the like occurs during operation.
  • Each unit is usually provided with a voltage applying mechanism (including an electrically grounding mechanism) near one end of each roller, and the unit-side terminal 110 and the voltage applying mechanism are electrically connected by wiring. Connected. A voltage supplied to each unit from an external power source or the like is supplied to each roller via the unit-side terminal 110, the wiring, and the voltage application mechanism.
  • a driving mechanism such as a gear for driving each roller may be provided near the other end of each roller after using a member formed of an insulating material.
  • a conical recess 130 a provided on one end face of the roller 130 and a hemispherical tip portion, and this tip portion is a conical recess of the roller 130.
  • the voltage application mechanism includes a housing side electrode 131 that is in contact with the inner peripheral surface of 130a and a metal leaf spring 132 that is connected to the housing side electrode 131 and pressurizes the housing side electrode 131 toward the roller 130. .
  • the central axis of the roller 130 and the apex of the conical depression substantially coincide with the center of the hemisphere at the tip of the housing side electrode 131 when viewed in the conveyance width direction.
  • the gap between the roller 130 and the housing-side electrode 131 may be lubricated with conductive grease.
  • the unit side terminal 110 and the leaf spring 132 are electrically connected by a wiring (not shown), and a voltage is applied to the roller 130 via the wiring, the leaf spring 132, the housing side electrode 131, and the recess 130a. Is done.
  • This voltage application mechanism can suppress wear of the roller 130 and the casing-side electrode 131 by bringing the casing-side electrode 131 into contact with the vicinity of the central axis of the roller 130, that is, a portion of the roller 130 having a relatively low peripheral speed. Further, the roller 130 vibrates by bringing the hemispherical tip of the housing side electrode 131 into contact with the conical depression provided in the roller 130 and pressurizing the housing side electrode 131 to the roller 130 side by the leaf spring 132.
  • the housing side electrode 131 is brought into contact with the end face of the roller 130, and the housing side electrode 131 is pressurized in the transport width direction by the plate spring 132, so that the deflection of the plate spring 132 is suppressed even when the roller 130 vibrates up and down. Therefore, it becomes easy to pressurize stably. Furthermore, by contacting the inner peripheral surface of the conical recess 130a and the hemispherical tip of the housing-side electrode 131, a space surrounded by the recess 130a and the tip of the housing-side electrode 101 is formed. Grease can be sealed in the space to suppress the scattering. However, a cover or the like may be provided around the voltage application mechanism as necessary in order to further suppress the scattering of grease.
  • the voltage application mechanism in each unit is not limited to that shown in FIG. 13 described above.
  • a conductive sliding member such as a conductive brush or a conductive bearing is provided in the housing, and this conductive sliding member is provided.
  • a method of applying a voltage by bringing the roller into contact with each roller can be used.
  • FIGS. 1 and 2 show only an example of the cleaning device.
  • the layer structure of each roller may be different from that in FIG.
  • the cleaning roller of the front side cleaning roller unit and the back side cleaning roller unit may not be charged.
  • the cleaning roller for example, an adhesive roller, an adsorbent resin roller, or the like can be used.
  • the rollers other than the front brush roller, the front cleaning roller, and the pair of back facing rollers may be driven rollers.
  • the rotation direction of the front brush roller is preferably the reverse direction with respect to the conveyance direction of the object, but may be the forward direction.
  • the rotation direction of the front side cleaning roller is preferably a forward direction with respect to the conveyance direction of the object, but may be a reverse direction.
  • the cleaning device includes at least a brush roller, a cleaning roller, a first counter roller disposed to face the brush roller, and a second counter roller disposed to face the cleaning roller. It is sufficient to provide one by one, and other configurations are arbitrary. Further, the second opposing roller is preferably an elastic roller, but may be a hard roller as long as foreign matter is not excessively pressed against the object S.
  • the cleaning device has been described in which the brush roller is disposed on the upstream side in the transport direction with respect to the cleaning roller.
  • the cleaning device of FIG. 14 differs from the cleaning device of the embodiment of FIGS. 1 and 2 in the arrangement of the cleaning roller and the brush roller in the transport direction D.
  • illustration of each part other than the cleaning roller 151 and the brush roller 141 is omitted.
  • the cleaning roller 151 mainly absorbs fine foreign matter, and the brush roller 141 scratches relatively large foreign matter on the surface of the object S, and mainly sucks the scraped foreign matter. Even in this case, it is preferable that the surface hardness of the first counter roller facing the brush roller 141 is higher than the surface hardness of the second counter roller facing the cleaning roller 151.
  • the foreign matter adhered to the cleaning roller and the brush roller is separately collected by the two collecting rollers.
  • the outer peripheral surface of the brush roller and the outer peripheral surface of the cleaning roller are separated. It is good also as a structure provided with one collection
  • a foreign matter collecting part may be provided in each of the back side cleaning roller unit and the back side brush roller unit.
  • both of the pair of opposed rollers are both electrically grounded, but other configurations may be employed.
  • both of the pair of opposed rollers may be fixed to 0 V, and may be fixed to a predetermined positive potential depending on the charging state of the foreign matter.
  • a condition to be satisfied is that a reference fixed potential is applied to the pair of opposed rollers with respect to the charged brush roller 41 and the charged cleaning roller 51. Therefore, a different fixed potential can be applied to each of the pair of opposed rollers as necessary. If the voltage difference between the fixed potential and the charged cleaning roller 51 is too small, a sufficient electric field for removing foreign substances cannot be generated. Therefore, the lower limit of this potential difference is preferably 50V.
  • the brush rollers 41 and 71 and the cleaning rollers 51 and 80 may have a positive potential within the scope of the idea of the present invention.
  • the pair of opposed rollers may be electrically grounded, or a fixed potential serving as a reference may be applied. This fixed potential may be 0 V, or may be a predetermined negative potential or a positive potential depending on the charged state of the foreign matter.
  • the charge train was determined by evaluating the chargeability of the workpiece (object) and the brush hair, with the objective of selecting a material for the brush hair suitable for removing foreign matter.
  • the target object and the foreign object As the target object and the foreign object, the target object in the target market and the foreign object which is a problem in the market were used. Specifically, acrylic plates, glass plates, green sheets and PET films were used as the objects, and acrylic scraps, copper powder, ceramic scraps (ceracas), glass scraps, polyester particles and fibers were used as foreign substances. .
  • the triboelectric charging property was evaluated by measuring the polarities when the objects and the brush hairs were frictionally charged with each other, the objects and the brush hairs, or the brush hairs with a surface electrometer. Further, the charging relationship between the foreign object and the object was evaluated by sandwiching the foreign object between the objects and frictionally charging it, and then sucking the foreign object and measuring the charge amount with a digital electrometer. These evaluation results are shown as a charge train in FIG.
  • the brush hair using a material positioned as far away as possible from the object and the foreign substance has a higher foreign substance adsorption force. Therefore, from the result of FIG. 15, it is guessed that the material 1 and the material 4 which are conductive polyester are suitable for foreign material removal.
  • the material 1 which is a fiber having a relatively large fineness, that is, a relatively thick fiber is preferable as the bristle.
  • the reason why the recovery rate when the material 4 is used is lower than the recovery rate when the material 1 having the same triboelectric charging property is used is assumed as follows. That is, since the material 4 is a fiber having a relatively small fineness, that is, a relatively thin fiber, the rigidity of the brush bristles 41C is insufficient, and a relatively large ceramic residue attached to the object S cannot be moved. It is believed that there is.
  • the conductive polyester of the material 1 that gave a suitable result in the previous evaluation was used.
  • a PET film having a thickness of 50 ⁇ m was used.
  • polyester particles having a particle size of 50 ⁇ m to 150 ⁇ m were used.
  • the predetermined voltage applied to the brush roller was 0V, -100V, -400V, -800V or -1,600V.
  • the evaluation results of the dust adsorption width are shown in FIG.
  • the lower limit of the voltage applied to the brush roller is preferably ⁇ 800V, more preferably ⁇ 600V.
  • the upper limit of the applied voltage is preferably ⁇ 200V, more preferably ⁇ 300V.
  • the influence of the peripheral speed of the brush roller was evaluated by changing the ratio (B / W) of the peripheral speed B of the brush roller to the conveyance speed W of the object, and evaluating it as a relationship with the removability of the ceramic residue.
  • B / W was 50% (for example, the peripheral speed of the brush roller was 6 m / min with respect to the object conveying speed of 12 m / min)
  • the ceramic residue was blown off to the entrance side of the workpiece.
  • the peripheral speed of the brush roller was changed to 3 m / min and the B / W was set to 25%, the above-mentioned repelling was suppressed.
  • B / W is preferably 25% or less because a foreign material smaller than a large foreign material is likely to be repelled.
  • the influence of the pressure contact amount of the brush roller on the object was evaluated by removing the ceramic residue while changing the pressure contact amount to 0.3 mm or 0.6 mm.
  • the pressure contact amount was 0.3 mm
  • a part of the ceramic residue passed through the brush roller and remained on the object.
  • the pressure contact amount was 0.6 mm
  • the ceramic residue could be removed.
  • the larger the pressure contact amount the better the removal of foreign matters.
  • scratches may occur depending on the type and state of the object.
  • the upper limit of the pressure contact amount differs for each object. Therefore, by adjusting the height of the brush roller unit using the height adjusting mechanism, the pressure contact amount of the brush roller can be optimized even when the thickness, type, state, etc. of the object are different.
  • the cleaning performance of the cleaning device was evaluated. Specifically, for the combinations of various foreign objects and objects, the cleaning device shown in FIGS. 1 and 2 is used, the peripheral speed and applied voltage of each roller are set as shown in Table 2, and the surface of the object before and after cleaning is determined. Evaluation was made by imaging.
  • FIGS. 18 to 20 (A) to (F) Specific combinations of foreign matters and objects were ceramic punch casks and green sheets, sebum and polarizing plates, cotton fibers and acrylic plates, polyester fibers and green sheets, or polyester particles and PET films. Moreover, the conveyance speed of the target object was set to 10 m / min.
  • the imaging results of each combination are shown in FIGS. 18 to 20 (A) to (F).
  • FIGS. 18 to 20 (A) to (F) are the imaging results after the cleaning on the left and the images after the cleaning on the right.
  • the object Sa is a green sheet
  • the foreign matter Xa is a ceramic punch residue ( ⁇ 4 mm, thickness 120 ⁇ m).
  • FIG. 18A the object Sa is a green sheet
  • the foreign matter Xa is a ceramic punch residue ( ⁇ 4 mm, thickness 120 ⁇ m).
  • the object Sb is a green sheet, and the foreign matter Xb is a ceramic residue (length 0.1 to 3 mm, thickness 170 ⁇ m) of various sizes and shapes.
  • the object Sc is a deflection plate and the foreign material Xc is sebum.
  • the object Sd is an acrylic plate, and the foreign matter Xd is a cotton fiber.
  • the object Se is a green sheet and the foreign matter Xe is a polyester fiber (length: 2 to 15 mm).
  • the object Sf is a PET film, and the foreign matter Xf is a polyester particle (particle size 50 to 150 ⁇ m).
  • the cleaning device of the present invention can remove not only relatively large millimeter-size foreign substances but also fine foreign substances, it can be suitably used for removing foreign substances such as dust adhering to the surface of a plate-like or film-like object. it can.

Landscapes

  • Cleaning In General (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
PCT/JP2017/009623 2016-03-09 2017-03-09 クリーニング装置 WO2017155074A1 (ja)

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CN201780016866.3A CN108778536B (zh) 2016-03-09 2017-03-09 清洁装置
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WO2022049593A1 (en) * 2020-09-04 2022-03-10 Signode India Ltd. System and process for removing debris from plastic sheets

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CN108778536B (zh) 2022-08-02
JPWO2017155074A1 (ja) 2018-03-15
TWI725170B (zh) 2021-04-21
CN108778536A (zh) 2018-11-09

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