KR20130029392A - Cleaning system - Google Patents

Abstract

Without performing maintenance work on a cleaning roller, the adsorption | suction operation | movement of a foreign material by a cleaning roller is continued over a long term. The cleaning roller 11 relatively rotates while being in contact with the surface of the material to be cleaned S, and removes foreign substances such as dust adhered onto the surface of the material to be cleaned using the electrostatic force. The transfer roller 21 rotates while contacting the surface of the cleaning roller 11. The cleaning roller 11 is grounded through the voltage stabilization circuit 12, and the electric charges to be sucked by the electrostatic force can be stably charged on the roller surface. The transfer roller 21 is capable of charging the surface with a charge for adsorbing the foreign matter adhering on the surface of the cleaning roller 11 by the electrostatic force. An external power source 31 is connected to the transfer roller 21 to the electrostatic force. This is to maintain a constant voltage for adsorption.

Description

Cleaning system {CLEANING SYSTEM}

The present invention relates to a cleaning system for removing foreign matter (dust, etc.) adhered to the surface of the material to be cleaned by electrostatic force. In particular, it is suitable when the object to be cleaned is a thin object (eg, a relatively high surface smoothness such as a glass substrate, a printed substrate (PCB, PCBA, etc.), a film, a sheet, a plastic sheet, or the like).

Conventionally, as a cleaning system which removes foreign substances, such as dust adhered on the surface of a glass substrate of a flat panel display (FPD), a thin film cleaning material, such as a bonded film and a printed circuit board, using an adhesive roller and using the adhesive force It is known to remove the said foreign material (for example, refer patent document 1).

In such an adhesive roller, micro foreign matter (for example, foreign material having an average diameter of 1 μm or less) cannot be removed, and it is difficult to completely remove foreign matters such as dust once adhered to the surface (adhesive layer) of the adhesive roller. The castle falls. In addition, since the adhesive roller is pressed to a certain degree to pressurize the cleaning material to remove foreign matters, if the cleaning material is a film, for example, the foreign material may be removed and the film may stick to the roller surface.

Therefore, the inventors, when removing foreign matters such as dust from the cleaning material, charges the electric charges capable of adsorbing the foreign matters by the electrostatic force to the surface of the cleaning rollers by the applied voltage, thereby causing the foreign matters to be removed by the cleaning rollers. A patent application is filed separately based on what can be removed using an electrostatic force (see Japanese Patent Application No. 2008-271797).

However, in the above description, since the foreign matter removed by the cleaning roller from the surface of the cleaning material by using the adsorption force by the electrostatic force is accumulated on the roller surface (outer peripheral surface) of the cleaning roller sequentially, the foreign material from the roller surface. It is necessary to perform regular maintenance work to remove.

By the way, in the cleaning system using the adhesive force of the adhesive roller, the mechanism which moves a foreign material from the said cleaning roller to the transfer roller side by contacting the transfer roller (adhesive roller) which has stronger adhesive force than a cleaning roller (adhesive roller) is generally used.

Therefore, it is conceivable to use the transfer roller having the strong adhesive force for the cleaning system described above.

Japanese Laid-Open Patent Publication No. 2008-168188

However, if the transfer roller having such strong adhesive force is used, the electric charges capable of adsorbing foreign matter on the surface of the cleaning roller by the electrostatic force cannot be stably charged. Therefore, it becomes difficult to carry out the adsorption operation | movement of the foreign material by a cleaning roller for a long term, without performing maintenance work with respect to a cleaning roller.

An object of the present invention is to provide a cleaning system capable of continuing the adsorption operation of foreign matter by a cleaning roller for a long period of time without performing maintenance work on the cleaning roller.

In the case of adsorbing foreign matter by electrostatic force (coulomb force), the charge retained on the surface of the roller tends to attract more force, but when the roller surface becomes excessively high voltage, the cleaning roller and the counterpart material to be cleaned Spark discharge occurs, unevenness occurs in the surface of the roller and the charged material of the cleaning material, foreign matter is attracted to the uneven portion, and there is a possibility that stable cleaning performance cannot be exhibited. In addition, there is a possibility that the counterpart may be damaged by the spark discharge. In addition, in the case where the material to be cleaned is an electronic component such as a semiconductor, which is weak in static electricity, electrostatic destruction that occurs even in the accumulation of electric charges that does not lead to spark discharge becomes a problem.

Therefore, in addition to the above object, the present invention also aims to provide a cleaning device which can suppress the voltage generated on the surface of the roller from being higher than necessary in order to adsorb foreign substances by electrostatic force, and stabilize the voltage. do.

Invention of Claim 1 is equipped with the cleaning roller which rotates and rotates in contact with the surface of a to-be-cleaned material, The cleaning roller removes the foreign materials, such as dust adhered on the surface of the to-be-cleaned material, with the said cleaning roller using electrostatic force. As a system, with respect to the cleaning roller, a transfer roller which rotates while being in contact with the surface of the cleaning roller is provided, and the cleaning roller has an electric charge for adsorbing foreign substances adhering on the surface of the cleaning material by electrostatic force to the surface. It is possible to charge, the transfer roller is capable of charging the surface to the charge for adsorbing foreign matter adhering on the surface of the cleaning roller by the electrostatic force, the cleaning roller is earthed through a voltage stabilization circuit, An external power source is directly or indirectly connected to the transfer roller. Voltage stabilizing circuit is characterized in that it is possible for the voltage to absorption by an electrostatic force to the foreign matter of the transfer roller changes.

In this way, since the cleaning roller is capable of charging the surface with electric charges for adsorbing the foreign matter adhering on the surface of the cleaning material by the electrostatic force, the foreign material on the surface of the cleaning material is adsorbed by the cleaning roller. In addition, the transfer roller can charge the surface with a charge for adsorbing the foreign matter adhering on the surface of the cleaning roller by the electrostatic force, so that the foreign matter adsorbed on the cleaning roller is adsorbed by the transfer roller. Therefore, it is not necessary to carry out maintenance work on the cleaning roller that is periodically removed (cleaned) or periodically replaced.

In addition, by changing the set voltage value of the voltage stabilization circuit connected to the cleaning roller, it is possible to suppress the excessive voltage generated on the surface of the roller in order to adsorb foreign substances by the electrostatic force more than necessary, and to stabilize the large voltage. Can be. In addition, it is possible to prevent static destruction of electronic components such as semiconductors, which are susceptible to static electricity.

In this case, as described in claim 2, the voltage stabilization circuit may use a fixed resistor, a variable resistor, or a switchable resistor that changes the resistance value by switching a fixed resistor used with a plurality of fixed resistors.

In this way, by changing the resistance value of the fixed resistor, the variable resistor or the switchable resistor, a voltage stabilization circuit capable of changing a large voltage for adsorbing the foreign material of the transfer roller by an electrostatic force can be easily configured. In the case of using a fixed resistor, the resistance value can be changed by replacing the fixed resistor.

That is, by changing the resistance value, the large voltage for adsorbing the foreign matter of the cleaning roller by the electrostatic force can be changed, so that even if a voltage is applied to the transfer roller by an external power source, the applied voltage is not changed. With respect to the cleaning roller, the adsorption force on the foreign matter adsorbed on the cleaning roller can be changed. For example, if the resistance value of the resistor connected to the cleaning roller is made small, the charge for adsorbing the foreign matter adhering on the surface of the cleaning roller by the electrostatic force is reduced, and is adsorbed on the cleaning roller. It is possible to cause the cleaning roller to lose the attraction force to the foreign matter. As a result, foreign matter adsorbed on the cleaning roller is adsorbed on the transfer roller. Therefore, maintenance work as mentioned above becomes easy.

Therefore, as in the conventional cleaning system using the adhesive force of the adhesive roller, maintenance work that periodically removes (cleans) foreign matter adhering to the roller surface of the cleaning roller or periodically replaces the cleaning roller with the foreign matter adhering thereto is performed. There is no need to implement it, and a cleaning system excellent in maintainability can be obtained. In addition, since the voltage applied to the transfer roller does not have to be controlled diligently, the design of an external power supply for applying a voltage to the transfer roller can be made compact.

As described in claim 3, the transfer roller rotates while being in contact with the surface of the cleaning roller, so that the transfer roller is rotated in contact with the surface of the cleaning roller so as to have a difference in surface characteristics of the transfer roller and the cleaning roller (for example, charging sequence). Therefore, it is preferable to generate a potential difference.

In this case, due to contact peeling due to the rotation of the cleaning roller and the transfer roller, a potential difference is generated in the transfer roller due to a difference in surface characteristics (for example, charging sequence) with the cleaning roller, and on the surface of the cleaning material The charge for adsorbing the foreign matter adhering to it by the electrostatic force is charged.

In addition, as described in claim 4, a cleaning brush that rotates in the direction of rotation or reverse direction is provided with respect to the transfer roller, and a metal roller is provided so as to rotate in the direction or direction that rotates with respect to the cleaning brush, Preferably, the external power source is connected to the metal roller so as to generate a potential difference between the transfer roller, the cleaning brush, and the metal roller.

In this case, foreign matter is removed from the transfer roller by the cleaning brush, transferred to the metal roller by the electrostatic force, and foreign matter is more efficiently removed from the transfer roller. In particular, the potential difference between the transfer roller and the transfer roller generated by an external power source connected to the metal roller can be changed as well, and the foreign material can be effectively conveyed to the metal roller.

In this case, as described in Claim 5, the cleaning blade which scrapes the foreign material adhering on the surface of the said metal roller by the front scraping part can be arrange | positioned near the surface of the said metal roller.

In this case, foreign matter adsorbed on the surface of the metal roller by the electrostatic force is scraped by the tip scraping portion of the cleaning blade, so that the foreign matter is efficiently removed from the metal roller.

In addition, as described in claim 6, in the vicinity of the cleaning blade, a suction port of an air-distributing means capable of sucking foreign matter by vacuum pressure, or a foreign matter receiving box for collecting and storing foreign matter scraped by the cleaning blade is disposed. desirable.

In this case, foreign matter adsorbed on the surface of the metal roller by the electrostatic force is scraped by the tip scraping portion of the cleaning blade, and the foreign matter is sucked by the negative pressure through the suction port of the air discharge means, or the foreign matter receiving box Since it is collect | recovered, there exists no possibility that the said foreign material may dirty around the said metal roller. In particular, when a foreign material accommodating box is arrange | positioned, a foreign material can be collect | recovered in a foreign material accommodating box, without installing power newly.

As described in claim 7, the cleaning material is sandwiched, and a guide roller is disposed on the opposite side to the cleaning roller, and the guide roller is formed by the electrostatic force on the foreign matter on which the cleaning roller is attached on the surface of the cleaning material. It is also possible to increase the electric field strength for adsorption.

In this way, the two rollers are opposed to each other by sandwiching the cleaning material, and the cleaning material is supported from above and below at the position where the cleaning roller and the guide roller are in contact with each other to remove foreign matter on the surface of the cleaning material in a stable state. Is performed.

In addition, the cleaning roller has a high electric field strength for adsorbing the foreign matter adhering on the surface of the cleaning material by electrostatic force by the guide roller, and the charged foreign material on the cleaning material is adsorbed on the cleaning roller according to a given electric field and efficiently. Removed.

The cleaning system of claim 8 is provided with a cleaning roller which rotates while being in contact with the surface of the material to be cleaned and moves relatively, and a cleaning system for removing foreign substances such as dust adhered on the surface of the material to be cleaned by the cleaning roller using electrostatic force. A transfer roller which rotates while being in contact with the surface of the cleaning roller is provided with respect to the cleaning roller, and the cleaning roller charges electric charges on the surface for adsorbing foreign substances adhering on the surface of the cleaning material by electrostatic force. The transfer roller is capable of charging the surface with a charge for adsorbing foreign matter adhering on the surface of the cleaning roller by electrostatic force, and a voltage of an external power source is directly or indirectly applied to the transfer roller. The cleaning roller is configured to be the cleaning A second voltage stabilization circuit is provided between the cleaning roller and the transfer roller, and a second voltage stabilization circuit is provided between the cleaning roller and the transfer roller to ground the first voltage stabilization circuit for controlling the large voltage of the roller to a predetermined voltage or less. do.

In this way, similarly to the above-described invention, the cleaning roller can charge an electric charge for adsorbing the foreign matter adhering on the surface of the cleaning material to the surface by electrostatic force, so that the foreign material on the surface of the cleaning material is adsorbed to the cleaning roller. do. In addition, the transfer roller can charge the surface with a charge for adsorbing the foreign matter adhering on the surface of the cleaning roller by the electrostatic force, so that the foreign matter adsorbed on the cleaning roller is adsorbed by the transfer roller. Therefore, it is not necessary to carry out maintenance work on the cleaning roller which is periodically removed (cleaned) or periodically replaced. Therefore, as in the conventional cleaning system using the adhesive force of the adhesive roller, maintenance work to periodically remove (clean) foreign matter adhering to the roller surface of the cleaning roller or periodically replace the cleaning roller to which the foreign matter is adhered. There is no need to implement it, and a cleaning system excellent in maintainability can be obtained.

In particular, by changing the set voltage value of the voltage stabilization circuit connected to the cleaning roller, it is possible to suppress the excessive voltage generated on the surface of the roller in order to adsorb foreign substances by electrostatic force more than necessary, thereby to stabilize the large voltage. have. In addition, it is possible to prevent static destruction of electronic components such as semiconductors, which are susceptible to static electricity.

Moreover, by changing the set voltage value of the said 1st voltage stabilization circuit, the adsorption force with respect to the foreign material adsorb | sucked to the said cleaning roller with respect to the said cleaning roller can be weakened. For example, when the set voltage value of the first voltage stabilization circuit is set to the opposite polarity, the charge for adsorbing the foreign matter adhering on the surface of the cleaning roller by the electrostatic force is reversed and adsorbed by the cleaning roller. It is possible to cause the cleaning roller to lose the suction force on the foreign matter. As a result, foreign matter adsorbed on the cleaning roller is adsorbed on the transfer roller. Therefore, maintenance work as mentioned above becomes easy.

In this case, as described in claim 9, the transfer roller rotates while being in contact with the surface of the cleaning roller, so that the difference between the surface characteristics of the transfer roller and the cleaning roller (for example, charging) between the cleaning roller and the cleaning roller. It is preferable to generate a potential difference according to the sequence).

In this case, due to contact peeling due to the rotation of the cleaning roller and the transfer roller, a potential difference is generated in the transfer roller due to a difference in surface characteristics (for example, charging sequence) with the cleaning roller, and on the surface of the cleaning material The charge for adsorbing the foreign matter adhering to it by the electrostatic force is charged.

In addition, as described in claim 10, a cleaning brush is provided so as to rotate in the direction or the reverse rotation with respect to the transfer roller, and a metal roller is provided so as to rotate in the direction or the reverse rotation with respect to the cleaning brush. The external power is connected to the metal roller, and a third voltage stabilization circuit for generating a potential difference between the transfer roller and the cleaning brush between the transfer roller and the cleaning brush includes the cleaning brush and the metal roller. It is preferable that a fourth voltage stabilization circuit is provided between the cleaning brush and the metal roller to generate a potential difference.

This removes foreign matters from the transfer roller by a cleaning brush, transfers them to the metal rollers by electrostatic force, and changes the large voltage of the metal rollers by a fourth voltage stabilization circuit so that the metal rollers adhere to the foreign materials adsorbed thereon. When the attraction force is lost, foreign matter is more efficiently removed from the metal roller. In particular, the potential difference between the transfer roller generated by an external power source connected to the metal roller can be changed as well, and foreign materials can be effectively conveyed to the metal roller.

Moreover, as described in Claim 11, the said 1st-4th voltage stabilization circuit has a 1st-4th resistor, respectively, between the said roller or the brush which contact | connects with each other by the said 1st-4th resistor. The voltage applied can be configured to be divided. Here, the resistor may be a fixed resistor or a variable resistor.

In this way, since the 1st-4th voltage stabilization circuit comprises the divided circuit by a resistor, desired 1st-4th voltage can be obtained between the said roller or the said brush, respectively.

As described in Claim 12, it is preferable that the said 1st-4th resistor is set to the resistance value smaller than the contact resistance between the said roller or the brush in contact.

In this way, since the voltage is divided by a resistor having a resistance value smaller than the contact resistance between the rollers or brushes in contact, a stable voltage can be obtained against an error or a change in the contact resistance between the rollers or cleaning brushes in contact.

As described in Claim 13, it is preferable that the said 1st-3rd voltage stabilization circuit has a constant voltage diode or a varistor (nonlinear resistance element), and the said 4th voltage stabilization circuit has a fixed resistor or a variable resistor.

In this way, the first to third voltage stabilization circuits have constant voltage diodes or varistors, and the fourth voltage stabilization circuits have fixed resistors or variable resistors, and stable voltages can be obtained by voltage dividing.

As described in Claim 14, it is preferable that the said constant voltage diodes of the said 1st-3rd voltage stabilization circuit connect them, or to connect them in series.

In this way, constant voltage diodes having a Zener effect can be connected to each other in series or evenly connected, so that a constant potential difference can be maintained regardless of polarity.

In this case, as described in Claim 15, it is preferable to provide a means for switching the polarity of the positive part of the voltage applied to the roller or the brush by the external power source.

This makes it possible to freely invert the polarity of the external power supply.

As described in Claim 16, the cleaning blade which scrapes the foreign material adhering on the surface of the said metal roller by the front scraping part can be arrange | positioned near the surface of the said metal roller.

In this case, foreign matter adsorbed on the surface of the metal roller by the electrostatic force is scraped by the tip scraping portion of the cleaning blade, so that the foreign matter is efficiently removed from the metal roller.

In that case, as described in claim 17, in the vicinity of the cleaning blade, a suction port of an air-distributing means capable of sucking foreign matter by vacuum pressure, or a foreign matter storage box for collecting and storing foreign matter scraped by the cleaning blade is disposed. It is desirable to have.

In this case, foreign matter adsorbed on the surface of the metal roller by the electrostatic force is scraped by the tip scraping portion of the cleaning blade, and the foreign matter is sucked by the negative pressure through the suction port of the air discharge means, or the foreign matter receiving box Since it is collect | recovered, there exists no possibility that the said foreign material may dirty around the said metal roller. In particular, when a foreign material accommodating box is arrange | positioned, a foreign material can be collect | recovered in a foreign material accommodating box, without installing power newly.

As described in Claim 18, the said cleaning material is sandwiched, and a guide roller is arrange | positioned on the opposite side to the said cleaning roller, The guide roller is a foreign material which the said cleaning roller adheres on the surface of the said cleaning material by electrostatic force. It is also possible to increase the electric field strength for adsorption.

In this way, the two rollers are opposed to each other by sandwiching the cleaning material, and the cleaning material is supported from above and below at the position where the cleaning roller and the guide roller are in contact with each other to remove foreign matter on the surface of the cleaning material in a stable supported state. Is performed.

In addition, the cleaning roller has a high electric field strength for adsorbing the foreign matter adhering on the surface of the cleaning material by electrostatic force by the guide roller, and the charged foreign material on the cleaning material is adsorbed on the cleaning roller according to a given electric field and efficiently. Removed.

Since the present invention has been configured as described above, it is possible to change the adsorption force on the foreign matter adsorbed on the surface of the cleaning roller, and the foreign matter can be stably transferred to the transfer roller side. As with the cleaning system, there is no need to periodically remove (clean) foreign matter adhering to the roller surface of the cleaning roller, or to perform maintenance work to periodically replace the cleaning roller with the foreign matter adhering to it. An excellent cleaning system can be obtained.

In particular, the invention of claim 1 can weaken the adsorption force on foreign matter adsorbed to the cleaning roller by changing the set voltage value of the voltage stabilization circuit connected to the cleaning roller. It is possible to adsorb foreign substances adsorbed on the transfer roller.

In addition, by changing the set voltage value of the voltage stabilization circuit connected to the cleaning roller, it is possible to suppress the excessive voltage generated on the surface of the roller in order to adsorb foreign substances by the electrostatic force more than necessary, thereby to stabilize the large voltage. Can be. In addition, it is possible to prevent static destruction of electronic components such as semiconductors, which are susceptible to static electricity.

According to the invention of claim 8, since the large voltage for adsorbing the foreign matter of the cleaning roller by the electrostatic force can be changed, the cleaning roller can be changed without changing the voltage applied by an external power source connected to the transfer roller. The adsorption force on foreign matter adsorbed on the cleaning roller can be weakened. As a result, foreign matter adsorbed on the cleaning roller is adsorbed on the transfer roller. Therefore, maintenance work as mentioned above becomes easy.

Also in this case, by changing the set voltage value of the voltage stabilization circuit connected to the cleaning roller, it is possible to suppress the excessive voltage generated on the surface of the roller in order to adsorb foreign substances by the electrostatic force more than necessary to stabilize the large voltage. Can be. In addition, it is possible to prevent static destruction of electronic components such as semiconductors, which are susceptible to static electricity.

1 (a) and 1 (b) are explanatory views of the operating principle of the first embodiment of the cleaning system according to the present invention, respectively.
2 is an explanatory diagram showing an example of the first embodiment.
It is a figure which shows the 1st modified example of embodiment shown in FIG.
It is a figure which shows the 2nd modified example of embodiment shown in FIG.
It is a figure which shows the 3rd modified example of embodiment shown in FIG.
It is a figure which shows the 4th modified example of embodiment shown in FIG.
7 (a), (b), (c) and (d) are explanatory views of the operating principle of the second embodiment of the cleaning system according to the present invention.
FIG.8 (a) (b) is explanatory drawing which shows an example of the said 2nd Embodiment.
It is a figure which shows the 1st modified example of embodiment shown in FIG.
It is a figure which shows the 2nd modified example of embodiment shown in FIG.
It is a figure which shows the 3rd modified example of embodiment shown in FIG.
(A) (b) is a figure which shows the 4th modified example of embodiment shown in FIG.
It is a figure similar to FIG. 2 which shows the 5th modified example of embodiment shown in FIG.
It is a figure which shows embodiment which arrange | positioned the cleaning unit two times continuously.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described according to drawing.

(First embodiment)

1 (a) and 1 (b) are explanatory diagrams of the operating principle of the first embodiment of the cleaning system according to the present invention.

As shown in FIG. 1A, the cleaning system 1 includes a cleaning roller 11 and a transfer roller 21 which rotates while contacting the surface of the cleaning roller 11 with respect to the cleaning roller 11. do.

The cleaning roller 11 is relatively moved while rotating while being in contact with the surface of the material to be cleaned S. The cleaning roller 11 can remove foreign substances such as dust attached on the surface of the material to be cleaned using the electrostatic force. . The cleaning roller 11 is capable of charging the outer circumferential surface with a charge that adsorbs foreign matter adhering on the surface of the cleaning material S by the electrostatic force, and utilizes the chargeability of the roller surface (outer circumferential surface) of the cleaning roller. To adsorb the foreign matter.

The transfer roller 21 is rotated while contacting the surface of the cleaning roller 11, so that the difference between the surface characteristics of the transfer roller 21 and the cleaning roller 11 between the cleaning roller 11 (for example, charging sequence). To generate a potential difference. By contact peeling by the rotation of the cleaning roller 11 and the transfer roller 21, the potential difference according to the difference of the surface characteristic (for example, charging sequence) with the cleaning roller 11 arises in the transfer roller 21, The charge for adsorbing the foreign matter adhering on the surface of the cleaning material S by the electrostatic force is charged.

In this way, the transfer roller 21 is provided on the side opposite to the cleaning material S of the cleaning roller 11 so as to be in contact with the cleaning roller 11, so that the foreign matter adhered to the cleaning roller 11 by the electrostatic force is transferred. It can transfer (move) to the (21) side. As a result, the cleaning roller 11 comes into contact with the cleaning material S while the foreign matter adhering to the outer circumferential surface of the cleaning roller 11 is transferred to the transfer roller 21. Therefore, the foreign matter on the outer circumferential surface of the cleaning roller 11 is constantly transferred to the transfer roller 21 side, and the cleaning roller 11 is in a state capable of exerting a cleaning effect at any time, so that the cleaning roller 11 is kept for a relatively long time. Adsorption operation of a foreign material can be continued. As a result, maintenance work for periodically removing foreign matters on the outer circumferential surface of the cleaning roller 11 or replacing the cleaning roller 11 is not necessary, which is advantageous in achieving improvement in maintenance property.

A constant voltage is applied to the core of the transfer roller 21 by the external power supply 31. The cleaning roller 11 is grounded through the first voltage stabilization circuit 12 so that electric charges for adsorbing foreign substances adhering on the surface of the cleaning material S by the electrostatic force can be stably charged on the roller surface. It is. The first stabilization circuit 12 is composed of a variable resistor 12a (see Fig. 1 (a)). As a matter of course, the first stabilization circuit 12 may be a fixed resistor 12b, as shown in Fig. 1B (hereinafter, the same).

Thus, since the cleaning roller 11 can charge the surface with the electric charge for adsorb | sucking the foreign material adhering on the surface of the cleaning material S by electrostatic force, the foreign material on the surface of the cleaning material S is a cleaning roller. Adsorbed on the surface of (11). In addition, since the transfer roller 21 can charge the roller surface with electric charges for adsorbing foreign matter adhering on the surface of the cleaning roller 11 by electrostatic force, the foreign matter adsorbed on the surface of the cleaning roller 11 is transferred. It adsorb | sucks to the surface of the roller 21, and moves to the transfer roller 21 from the cleaning roller 11. As shown in FIG. Therefore, it is not necessary to perform the maintenance work of regularly removing (cleaning) or periodically replacing the cleaning roller 11, so that a cleaning system excellent in maintenance property can be obtained.

Moreover, since the 1st voltage stabilization circuit 12 connected with the cleaning roller 11 is provided, the resistance value of the 1st voltage stabilization circuit 12 (variable resistor 12a) is changed, and the said foreign material of the cleaning roller is carried out. Since the large voltage for adsorbing the polymers by the electrostatic force can be changed, the adsorption force with respect to the foreign matter adsorbed on the cleaning roller 11 can be changed with respect to the cleaning roller 11. Therefore, even if a voltage is applied to the transfer roller 21 by the external power supply 31, the suction force of the foreign matter adsorbed to the cleaning roller 11 against the cleaning roller 11 is not changed without changing the applied voltage. Can change. For example, if the resistance value of the variable resistor 12a connected to the cleaning roller 11 is made small, the charge for adsorbing foreign matter adhering on the surface of the cleaning roller 11 by the electrostatic force is reduced. It is possible to cause the cleaning roller 11 to lose the adsorption force to the foreign matter adsorbed on the cleaning roller 11. As a result, the foreign matter adsorbed on the cleaning roller 11 is adsorbed on the transfer roller 21. Therefore, maintenance work as mentioned above becomes easy.

Therefore, as in the conventional cleaning system using the adhesive force of the adhesive roller, maintenance work to periodically remove (clean) foreign matter adhering to the roller surface of the cleaning roller or periodically replace the cleaning roller to which the foreign matter is adhered. There is no need to implement it, and a cleaning system excellent in maintainability can be obtained. Moreover, since the voltage applied by the external power supply 31 connected to the transfer roller 21 does not have to be controlled diligently, the design of the external power supply 31 can be made compact.

Subsequently, the cleaning roller 11 and the transfer roller 21 will be described.

The cleaning roller 11 is provided on a core (core rod) 11a which is a conductive shaft member, an inner layer portion 11b that is provided at the outer circumferential portion of the core 11a, and which is conductive, and an outer side of the inner layer portion 11b. A thin cylindrical outer layer portion 11c made of a material having a higher resistance than the inner layer portion 11b has a two-layer structure.

The material forming the outer layer portion 11c of the cleaning roller 11 is selected to be capable of charging an electric charge that adsorbs foreign substances such as dust adhered on the surface of the cleaning material S by electrostatic force.

As thickness of the outer layer part 11c of the cleaning roller 11, 2-500 micrometers (more preferably, 5-50 micrometers) is preferable. This is because when the thickness of the outer layer portion 11c is less than 2 µm, electric charges tend to be difficult to charge on the roller surface (outer layer portion surface), while it is not industrially effective to have a thickness exceeding 500 µm. Instead of the core 11a, a core rod made of a conductive carbon material, a synthetic resin composite material, or the like may be used. The core 11 (a core) 11a is preferably 10 ⁵ Ω or less as a resistance value between the core overlapping portion and the core end.

An electrically conductive elastic material (for example, a polyester-based urethane containing carbon (conductive material), etc.) is used for the inner layer portion 11b, and has a lower hardness or approximately the same hardness as the outer layer portion 11c. The inner layer portion 11b is not particularly limited as long as it is lower than the outer layer portion 11c, but the volume resistivity is preferably about 10 ⁴ to 10 ¹² Ωcm.

The material used for the outer layer part 11c has a hardness (JIS) of 50 ° or more (preferably 50 ° or more and less than 100 °, more preferably 55 ° or more and less than 100 °, still more preferably 65 ° or more and less than 100 °). -A) The outer layer portion 11c has a higher volume resistivity than the inner layer portion 11b. The outer layer portion 11c preferably has a volume resistivity of 10 ⁸ Ωcm or more, more preferably 10 ¹⁰ Ωcm or more.

As a preferable example of the material which forms the outer layer part 11c of the cleaning roller 11, a urethane resin is mentioned and acrylic mixed urethane or fluorine mixed urethane is mentioned. Here, "acrylic mixed urethane" has polyester polyurethane or polyether polyurethane as a main component, (i) a mixture of a thermoplastic urethane resin and a silicone acrylic copolymer resin, and (ii) an acrylic resin (for example, methacrylic acid). -A graft compound formed by grafting an aminoethyl group to a main chain made of a methyl methacrylate copolymer) and a thermoplastic urethane resin; and (iii) a mixture consisting of an acrylic resin, a urethane resin, and a fluorine-based surface coating agent. Urethane "is a polyurethane as a main component, and means that the urethane fluorine copolymer was mixed with the thermoplastic urethane resin.

The transfer roller 21, like the cleaning roller 11, has a conductive core 21a, a cylindrical inner layer portion 21b provided outside the core 21a, and an outer side of the inner layer portion 21b. The outer layer portion 21c (elastic layer portion) provided in the upper portion 21c may have a higher volume resistivity than the inner layer portion 21b. However, the transfer roller 21 may also have a structure in which the core 21a is provided with a cylindrical outer layer portion (elastic layer portion) directly. In addition, the outer layer portion 21c of the transfer roller 21 has a higher volume resistivity than the core 21a, and can charge electric charges that adsorb foreign substances adhering to the outer circumferential surface of the cleaning roller 11 to the outer circumferential surface by electrostatic force. Is selected.

The transfer roller 21 rotates together with the cleaning roller 11 and is charged by contact peeling so as to be attached to the outer circumferential surface of the cleaning roller 11 between the outer circumferential surface of the transfer roller 21 and the outer circumferential surface of the cleaning roller 11. The electric potential difference enough to transfer (move) the foreign matter which has been made to the outer peripheral surface of the transfer roller 21 by an electrostatic force is generated. That is, the transfer roller 21 has the same sign as the charge (positive charge or negative charge) charged to the roller 11 with respect to the cleaning roller 11 due to the difference in roller surface characteristics (for example, charging sequence). Moreover, the absolute value of a large voltage is larger than the roller 11, and it is made to have a potential difference which can adsorb | suck a foreign material. In this regard, as the material for forming the outer layer portion 21c of the transfer roller 21, a potential difference generated as large as possible is selected in the range of the same polarity with respect to the cleaning roller 11 and without impairing stable adsorption property. It is preferable.

The foreign material transferred to the transfer roller 21 side with the potential difference generated by the contact peeling of the cleaning roller 11 and the transfer roller 21 stops the rotation of the transfer roller 21, so that the transfer roller 21 itself is subjected to electrostatic force. Since the adsorption force is lost, it can be relatively easily removed from the transfer roller 21.

In addition to the above-mentioned, as shown in FIG. 2, the cleaning roller 41 which rotates in the opposite direction to the direction which co-rotates with respect to the transfer roller 21 is provided, and it co-rotates with respect to this cleaning brush 41. FIG. The metal roller 42 may be provided to rotate in the direction. In this case, the external power supply 31 is connected to the metal roller 42. In this case, as shown in Fig. 3, instead of the variable resistor, a switch type resistor which has a plurality of fixed resistors 43a and switches the fixed resistor 43a used by the changeover switch 43b to change the resistance value ( 43) can also be used as the first voltage stabilization circuit 12A.

Moreover, as shown in FIG. 4, the cleaning blade 44 which arranges the foreign material adhering on the surface of the metal roller 42 on the surface of the metal roller 42 at the front scraping part is arrange | positioned above the metal roller 42, A suction port 45 of an air distributing means (not shown) in the vicinity of the cleaning blade 44 and capable of sucking foreign matter by a negative pressure above the metal roller 42 may be disposed. As a result, the foreign matter scraped by the tip scraping portion of the cleaning blade 44 is attracted by the negative pressure through the suction port 45 of the air-distributing means, so that the foreign matter is not likely to be soiled around the metal roller 42. .

As shown in FIG. 5, the foreign material accommodating box 46 which collect | recovers and accumulates the foreign material scraped by the cleaning blade 44 provided on the surface of the metal roller 42 can be provided, and the foreign material scattered by the rotation of a brush can be provided. It is also possible to provide a foreign material storage box for collecting and accumulating.

As shown in FIG. 6, the to-be-cleaned material S is sandwiched, and the guide roller 51 is arrange | positioned on the opposite side to the cleaning roller 11, The guide roller 51 has the said cleaning roller on the surface of the to-be-cleaned material. The intensity | strength of the electric field for adsorb | sucking the foreign material adhering to by electrostatic force can be made high.

(Way)

In the cleaning system shown in Fig. 2, the cleaning roller 11 and the transfer roller 21 held by an insulating member (not shown) are brought into contact with each other to co-rotate at a circumferential speed of 5 m / min, and the cleaning roller 11 The earth through the variable resistor 12a was installed in the core 11a. Moreover, the external power supply 31 was connected to the metal roller 42 provided with respect to the transfer roller 21 via the cleaning brush 41. As shown in FIG. The cleaning brush 41 was installed so as to rotate in the opposite direction to the direction of the co-rotation with respect to the transfer roller 21, and the metal roller 42 was installed so as to rotate in the direction of the co-rotation with respect to the cleaning brush 41.

In the above state, the surface potential of each member with respect to the change in the resistance value of the variable resistor 12a was measured using a surface electrometer (Mode1341B manufactured by Trex Corporation).

From this measurement result, it can be seen that by adjusting the resistance value of the variable resistor 12a, the surface potential of the cleaning roller 11 can be adjusted, and the adsorption force to foreign matter adsorbed on the cleaning roller 11 can be changed. have.

(Second Embodiment)

As shown in Fig. 7A, the cleaning roller 11 is capable of charging the surface with electric charges for adsorbing foreign matter adhering on the surface of the material to be cleaned by electrostatic force, and having a constant voltage diode 13a. It is grounded through the stabilization circuit 13. With respect to this cleaning roller 11, a transfer roller 21 which rotates while contacting the surface of the cleaning roller 11 is provided, and an external power source 31 is connected to the transfer roller 21, and on the surface of the cleaning roller. An electric charge for adsorbing the foreign matter attached to the surface by the electrostatic force can be charged to the surface.

Thus, since the 1st and 2nd voltage stabilization circuits 13 and 14 are comprised from the variable resistor 14a and the constant voltage diode 13a which has a Zener effect, a stable large voltage can be obtained. It goes without saying that the fixed resistor 14b may be replaced with the variable resistor 14a as shown in Fig. 7B.

The first voltage stabilization circuit 13 may also have a structure having a pair of constant voltage diodes 13a and 13a (zener diodes) provided so as to face each other (or back) as shown in Fig. 7 (c) and (d). Do. In this way, when the constant voltage diodes having the Zener effect are connected in series or equally connected, a stable large voltage can be obtained regardless of the polarity.

The second voltage stabilization circuit 14 is provided between the cleaning roller 11 and the transfer roller 21 to generate a potential difference between the cleaning roller 11 and the transfer roller 21. This second stabilization circuit 14 has a variable resistor 14a, of course, which can be used as the fixed resistor 14b.

In particular, by changing the set voltage value of the constant voltage diode 13a (first voltage stabilization circuit 13), the adsorption force on the cleaning roller 11 to foreign matter adsorbed to the cleaning roller 11 can be weakened. have. For example, when the set voltage value of the first voltage stabilization circuit 13 is set to the opposite polarity, the charge for adsorbing foreign matter adhering on the surface of the cleaning roller 11 by the electrostatic force is reversed, and the cleaning roller is reversed. It is possible to cause the cleaning roller 11 to lose the adsorption force to the foreign matter adsorbed on the (11). As a result, the foreign matter adsorbed on the cleaning roller 11 is adsorbed on the transfer roller 21. Therefore, maintenance work as mentioned above becomes easy.

Therefore, similarly to the first embodiment, the cleaning roller 11 does not need to be periodically maintained (removed) or periodically replaced.

In the case of this second embodiment as in the first embodiment, as shown in Fig. 8A, a cleaning brush 41 is provided with respect to the transfer roller 21 that rotates in the direction opposite to the direction in which the rotary roller 21 rotates. In addition, the metal roller 42 may be provided so as to rotate in the direction of mutual rotation with respect to the cleaning brush 41.

In this case, a second voltage stabilization circuit 15 (constant voltage diode 15a) is connected between the cleaning roller 11 and the transfer roller 21, and a third between the transfer roller 21 and the cleaning brush 41. The voltage stabilization circuit 16 (constant voltage diode 16a) is connected, and the fourth voltage stabilization circuit 17 (variable resistor 17a) is connected between the cleaning brush 41 and the metal roller 42, and transfer is performed. It is configured to generate a potential difference between the roller 21, the cleaning brush 41, and the metal roller 42. In addition, the 4th voltage stabilization circuit 17 can also be set as the fixed resistor 17b instead of the variable resistor 17a as shown to FIG. 8 (b) (it is the same below).

In this case, foreign matter is removed from the transfer roller 21 by the cleaning brush 41 and transferred to the metal roller 42 by the electrostatic force. And when the large voltage of the metal roller 42 is changed by the 4th voltage stabilization circuit 17, and the metal roller 42 loses the adsorption force with respect to the foreign material adsorb | sucked to it, a foreign material is seen from the metal roller 42 more. It can be removed efficiently. In particular, the potential difference between the transfer roller 21 generated by the external power supply 31 connected to the metal roller 42 can also be changed, and the foreign material can be conveyed to the metal roller 42 effectively.

Moreover, since the 1st-4th voltage stabilization circuits 13, 15-17 are comprised from the constant voltage diodes 13a, 15a, 16a and the variable resistor 17a which have a Zener effect, a stable voltage can be obtained.

Moreover, as shown in FIG. 9, the cleaning blade 44 which arranges the foreign material adhering on the surface of the metal roller 42 on the surface of the upper side of the metal roller 42 at the front scraping part, and arrange | positions the The suction port 45 of the air distributing means in the vicinity of the cleaning blade 44 and capable of sucking foreign matter by the negative pressure above the metal roller 42 may be disposed.

In this way, foreign matter adsorbed on the surface of the metal roller 42 by the electrostatic force is scraped by the tip scraping portion of the cleaning blade 44. In this way, foreign matter adsorbed on the surface of the metal roller 42 by the electrostatic force is scraped by the tip scraping portion of the cleaning blade 44, so that the foreign matter is efficiently removed from the metal roller 42. In addition, since the foreign matter is sucked by the negative pressure through the suction port 45 of the air-distributing means, there is no fear that the foreign matter may be contaminated around the metal roller 45.

As shown in FIG. 10, the foreign material accommodating box 46 which collect | recovers and accumulates the foreign material scraped by the cleaning blade 44 provided in the side on the surface of the metal roller 42 can also be provided.

By doing in this way, a foreign material can be collect | recovered in the foreign material storage box 46, without installing power newly. The foreign material accommodating box 46 can also be provided in the position which can collect | recover and accumulate the foreign material scattered by the rotation of the brush 41.

As shown in FIG. 11, the guide roller 51 can also be arrange | positioned on the opposite side to the cleaning roller 11 by pinching | cleaning material S. FIG. This guide roller 51 increases the electric field strength for the cleaning roller 11 to adsorb foreign substances adhering on the surface of the cleaning material S by the electrostatic force.

In this case, the two rollers 11 and 51 face each other with the cleaning material S interposed therebetween, and the cleaning material 11 is vertically positioned at the position where the cleaning roller 11 and the guide roller 51 contact each other. And foreign matter on the surface of the cleaning material S are removed in a state of being supported stably.

Moreover, the cleaning roller 11 has the electric field strength for adsorb | sucking the foreign material adhering on the surface of the to-be-cleaned material S by electrostatic force by the guide roller 51, and according to a given electric field, the to-be-cleaned material S The charged foreign matter on) is adsorbed by the cleaning roller 11 and is efficiently removed.

As shown in Fig. 12A, the first, second, third and fourth voltage stabilization circuits 13B, 15B, 16B and 17 are also constituted by the variable resistors 13b, 15b, 16b and 17a. By configuring the divided circuits by the variable resistors 13b, 15b, 16b, and 17a, it is also possible to stably obtain the first to fourth voltages. Also in this case, as shown in Fig. 12B, the fixed resistors 13c, 15c, 16c, and 17b are used as the first, second, third and fourth voltage stabilization circuits 13B, 15B, 16B, and 17b. It is also possible to use.

In this case, the rollers are in contact with each other by being divided by the variable resistors 13b, 15b, 16b, and 17a which become a resistance value smaller than the contact resistance between the rollers 11, 21, 42 or brushes 41 in contact. A stable voltage can be obtained regardless of an error or a change in contact resistance between the (11, 21, 42) or the cleaning brush 41.

As shown in FIG. 13, when the polarity switching circuit 61 which can switch the polarity of the application voltage of the external power supply 31 is provided, the said polarity can be switched easily. In this case, the first to third voltage stabilization circuits 13A, 15A, and 16A are composed of two constant voltage diodes 13a, 15a, and 16a facing each other so that a stable voltage can be obtained regardless of the polarity. .

Next, in the cleaning system shown in FIG. 13, the cleaning roller 11 and the transfer roller 21 held by an insulating member (not shown) are brought into contact with each other to co-rotate at a circumferential speed of 5 m / min, and the cleaning roller. An earth via a first voltage stabilization circuit 13 (constant voltage diode 13a) composed of a constant voltage diode 13a (zener diode) was provided in the core of (11). Moreover, the cleaning brush 41 and the metal roller 42 are provided with respect to the transfer roller 21, and the 2nd voltage stabilization circuit 15 (constant voltage diode) between the cleaning roller 11 and the core of the transfer roller 21 is provided. 15a, the third voltage stabilization circuit 16 (constant voltage diode 16a) is formed between the transfer roller 21 and the core of the cleaning brush 41, and the cleaning brush 41 and the metal roller 42 The fourth voltage stabilization circuit 17 (variable resistor 17a) was provided between the cores, respectively. The cleaning brush 41 was installed so as to rotate in the opposite direction to the direction of the co-rotation with respect to the transfer roller 21, and the metal roller 42 was installed so as to rotate in the direction of the co-rotation with respect to the cleaning brush 41.

In the above state, the surface potentials of the cleaning roller 11, the transfer roller 21, the cleaning brush 41, and the metal roller 42 by the voltage stabilization circuits 13, 15 to 17 are measured by a surface electrometer (Model 341B manufactured by Trex Corporation). ) Was measured.

From this result, it turns out that the electric potential of the cleaning roller 11, the transfer roller 21, the cleaning brush 41, and the metal roller 42 can be maintained at arbitrary values, without breaking down. Therefore, the adsorption force with respect to the foreign material adsorbed on the surface of the cleaning roller 11 can be stabilized, and the foreign material can be reliably transferred to the transfer roller 21, the cleaning brush 41, and the metal roller 42.

In addition to the above-mentioned, this invention can also be changed and implemented as follows.

(i) As shown in FIG. 14, cleaning unit U1 (cleaning roller 11, transfer roller 21, cleaning brush 41, metal roller 42) and cleaning unit U2 (cleaning roller ( 11 '), the transfer roller 21', the cleaning brush 41 ', and the metal roller 42' are disposed in succession, and in each of the units U1 and U2, to the cleaning rollers 11 and 11 '. On the other hand, the signs of the electric charges charged on the outer circumferential surfaces of the cleaning rollers 11 and 11 'may be reversed. In this way, the cleaning roller 11 'which positively charged the negatively charged foreign material with the cleaning roller 11 (cleaning unit U1) which negatively charged the positively charged foreign material adhering on the surface of the cleaning material S is cleaned. (Cleaning unit U2) can remove each, and the range of the foreign material which can be removed becomes large. In addition, although FIG. 14 has shown what was shown in FIG. 2 in 2 continuous arrangements, it cannot be overemphasized that the range of the foreign material which can be removed by 2 consecutive arrangements similarly about other embodiment can be enlarged.

(ii) The present invention is suitable for the case where the material to be cleaned is thin especially a film, sheet, printed board (PCB, PCBA) or the like, but is not limited thereto.

S… Pick cleaning material
11 ... Cleaning roller
12, 12A ... Voltage stabilization circuit
12a ... Variable resistor
12b ... Fixed resistor
13, 13A, 13B... First voltage stabilization circuit
13a, 15a, 16a... Constant voltage diode
14, 15, 15A, 15B... Second voltage stabilization circuit
14a, 17a, 13b, 15b, 16b... Variable resistor
14b, 17b, 13c, 15c, 16c... Fixed resistor
16, 16A, 16B... Third voltage stabilization circuit
17 ... Fourth voltage stabilization circuit
21 ... Transfer roller
31 ... External power
41... Cleaning brush
42 ... Metal roller
43 ... Switchable resistor
44 ... Cleaning blade
45... Inlet
46... Foreign body accommodation box
51 ... Guide roller
61... Polarity switching circuit

Claims (18)

A cleaning system comprising a cleaning roller that rotates while being in contact with the surface of the material to be cleaned while moving relative to the surface of the material to be cleaned, wherein foreign matters such as dust adhered to the surface of the material to be cleaned are removed by the cleaning roller using an electrostatic force.
With respect to the cleaning roller, a transfer roller which rotates while being in contact with the surface of the cleaning roller is provided,
The cleaning roller may charge electric charges on the surface to adsorb foreign substances adhering on the surface of the cleaning material by electrostatic force,
The transfer roller is one capable of charging the surface with a charge for adsorbing foreign matter adhering on the surface of the cleaning roller by electrostatic force,
The cleaning roller is grounded through a voltage stabilization circuit, and an external power source is directly or indirectly connected to the transfer roller.
And said voltage stabilization circuit is capable of changing a large voltage for adsorbing said foreign material of said transfer roller by an electrostatic force. The cleaning system according to claim 1, wherein the voltage stabilization circuit is a fixed resistor, a variable resistor, or a switchable resistor for changing a resistance value by switching a fixed resistor used with a plurality of fixed resistors. 2. The transfer roller according to claim 1, wherein the transfer roller rotates while being in contact with the surface of the cleaning roller, thereby generating a potential difference according to a difference in charging characteristics between the transfer roller and the surface of the cleaning roller between the cleaning roller. Cleaning system, characterized in that. 2. The cleaning roller as set forth in claim 1, wherein a cleaning brush that rotates in a co-rotating direction or a reverse direction is provided with respect to the transfer roller, and a metal roller is provided so as to rotate in a co-rotating direction or a reverse direction with respect to the cleaning brush.
And the external power source is connected to the metal roller so as to generate a potential difference between the transfer roller, the cleaning brush, and the metal roller. The cleaning system according to claim 4, wherein a cleaning blade for scraping foreign matter adhering on the surface of the metal roller at the front scraping portion is arranged near the surface of the metal roller. 6. The foreign matter storage box according to claim 5, wherein in the vicinity of the cleaning blade, a suction port of an air-distributing means capable of sucking foreign matter by vacuum pressure, or a foreign matter receiving box for collecting and storing foreign matter scraped by the cleaning blade is arranged. Cleaning system. The cleaning roller of claim 1, wherein the cleaning material is sandwiched with a guide roller on a side opposite to the cleaning roller, and the guide roller adsorbs the foreign matter on which the cleaning roller is attached on the surface of the cleaning material by electrostatic force. Cleaning system, characterized in that for increasing the field strength. A cleaning system comprising a cleaning roller that rotates while being in contact with the surface of the material to be cleaned while moving relative to the surface of the material to be cleaned, wherein foreign matters such as dust adhered to the surface of the material to be cleaned are removed by the cleaning roller using an electrostatic force.
With respect to the cleaning roller, a transfer roller which rotates while being in contact with the surface of the cleaning roller is provided,
The cleaning roller may charge electric charges on the surface to adsorb foreign substances adhering on the surface of the cleaning material by electrostatic force,
The transfer roller is one capable of charging the surface with a charge for adsorbing foreign matter adhering on the surface of the cleaning roller by electrostatic force,
The transfer roller is configured to be applied directly or indirectly the voltage of the external power source,
While the cleaning roller is grounded through a first voltage stabilization circuit that controls the large voltage of the cleaning roller to a set voltage or less, a second voltage stabilization circuit is provided between the cleaning roller and the transfer roller to generate a potential difference therebetween. Cleaning system, characterized in that installed. 9. The method of claim 8, wherein the transfer roller rotates while being in contact with the surface of the cleaning roller, thereby generating a potential difference between the cleaning roller according to a difference in charging characteristics of the transfer roller and the surface of the cleaning roller. The cleaning system characterized by the above-mentioned. 9. A cleaning brush according to claim 8, wherein a cleaning brush is provided so as to rotate in a direction or in a reverse rotation direction with respect to the transfer roller.
The metal roller is installed so as to rotate in the direction or the reverse rotation with respect to this cleaning brush,
The external power source is connected to this metal roller,
A third voltage stabilization circuit for generating a potential difference between the transfer roller and the cleaning brush between the transfer roller and the cleaning brush, and between the cleaning brush and the metal roller; And a fourth voltage stabilization circuit for generating a potential difference between the cleaning systems. The method of claim 10, wherein the first to fourth voltage stabilization circuit has a first to fourth resistor, respectively,
The voltage applied between the rollers or the brushes in contact with each other is divided by the first to fourth resistors. 12. The cleaning system according to claim 11, wherein the first to fourth resistors are set to a resistance value smaller than the contact resistance between the roller or the brush in contact. The method of claim 10, wherein the first to third voltage stabilization circuit has a constant voltage diode or varistor,
And said fourth voltage stabilization circuit has a fixed resistor or a variable resistor. The cleaning system according to claim 13, wherein the constant voltage diodes of the first to third voltage stabilization circuits are connected to each other in series or equally connected to each other. 15. The cleaning system according to claim 14, further comprising means for switching the polarity of the imposition of the voltage applied to the roller or the brush by the external power source. The cleaning system according to claim 10, wherein a cleaning blade for scraping foreign matter adhering on the surface of the metal roller at the front scraping portion is disposed near the surface of the metal roller. 17. The foreign matter storage box according to claim 16, wherein an inlet of an air-distributing means capable of sucking foreign matter by vacuum pressure, or a foreign matter receiving box for collecting and storing foreign matter scraped by the cleaning blade is arranged near the cleaning blade. Cleaning system. 9. The method of claim 8, wherein the cleaning material is sandwiched and a guide roller is disposed on the opposite side of the cleaning roller, and the guide roller adsorbs the foreign matter on which the cleaning roller is attached on the surface of the cleaning material by electrostatic force. Cleaning system, characterized in that for increasing the field strength.

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