WO2021112148A1

WO2021112148A1 - Cleaning device

Info

Publication number: WO2021112148A1
Application number: PCT/JP2020/044939
Authority: WO
Inventors: 三橋　浩; 松本　英樹; 後藤　公也
Original assignee: バンドー化学株式会社
Priority date: 2019-12-06
Filing date: 2020-12-02
Publication date: 2021-06-10
Also published as: CN114340806A; JPWO2021112148A1; TW202122169A

Abstract

The cleaning device according to the present invention is provided with: a pair of cleaning brushes that are brought into contact with one surface of a transported sheet-like object to be cleaned, and are driven to rotate; and a pair of rollers that are brought into contact with the other surface of the object to be cleaned, and that face the pair of cleaning brushes. The pair of cleaning brushes each have a cylindrical metal core, and a brush part formed of a plurality of filaments and provided on the circumferential surface of the metal core. The brush part is rotationally driven so as to be brought into contact with at least edge portions on both side of the one surface. The direction of rotation of one of the cleaning brushes at a contact portion thereof with the one surface is the forward direction relative to the direction in which the object to be cleaned is transported, and the direction of rotation of the other cleaning brush at a contact portion thereof with the one surface is the backward direction.

Description

Cleaning equipment

The present invention relates to a cleaning device.

In recent years, cleaning devices have been developed for removing foreign substances such as dust adhering to the surface of objects such as flat panel display (FPD) glass substrates, printed circuit boards on which electronic components are mounted, resin thin plates, film materials, and metal thin plates. There is.

As such a cleaning device, a cleaning roller having a charged surface and a roller-shaped cleaning brush are provided, and the direction of rotation at the contact portion of the cleaning roller with the surface of the object is relative to the transport direction of the object. A cleaning device is known in which the direction of rotation at the contact portion of the cleaning brush with the surface of the object is opposite to the transport direction of the object (see Japanese Patent Application Laid-Open No. 2016-215155). ).

In this conventional cleaning device, a relatively large millimeter-sized foreign matter can be effectively removed with a cleaning brush, and fine foreign matter can be effectively removed by adsorbing the surface to the surface of the cleaning roller in a charged state. Therefore, the conventional cleaning device can remove fine foreign matter as well as relatively large foreign matter of millimeter size.

Japanese Unexamined Patent Publication No. 2016-215155

For objects such as resin thin plates and film materials, burrs may occur on both edges of the surface during the manufacturing process itself. Since a part of this burr is connected to the object, it is difficult to sufficiently remove it with the above-mentioned conventional cleaning device.

The present invention has been made in view of such inconvenience, and an object of the present invention is to provide a cleaning device capable of effectively removing burrs generated on the surface of an object.

As a result of diligent studies on deburring, the present inventors have found that a cleaning brush having a columnar core metal and a brush portion having a plurality of bristles provided on the peripheral surface of the core metal is effective, and the present invention has been found. Was completed. Bali is generally partly connected to the object and the other part is floating away from the object. The present inventors effectively remove the burrs because the tips of the brush enter between the floating portion of the burrs and the object and scrape the burrs to remove the burrs from the object. I'm guessing it can be done.

That is, the cleaning device of the present invention is a cleaning device that cleans at least one surface of a sheet-shaped object to be conveyed, and includes a pair of cleaning brushes that are rotationally driven in contact with the one surface and the above. The other surface of the object is provided with a pair of rollers that are in contact with the pair of cleaning brushes facing each other, and the pair of cleaning brushes is formed of a columnar core metal and a plurality of bristles. It has a brush portion provided on the peripheral surface, and is rotationally driven so that the brush portion comes into contact with at least both side edges of the one surface, and is one of the pair of cleaning brushes. The direction of rotation at the contact portion with the surface of the object is forward with respect to the transport direction of the object, and the direction of rotation of the other cleaning brush at the contact portion with the one surface is the transport direction of the object. On the other hand, it is in the opposite direction.

In the cleaning device, a cleaning brush that is rotationally driven in the forward direction removes burrs that are separated from the object on the upstream side in the transport direction, and a cleaning brush that is rotationally driven in the reverse direction removes burrs that are separated from the object. It is possible to remove burrs that are floating away from the surface. Therefore, since the cleaning device can remove burrs that are floating in any direction and separated from each other, burrs generated on the surface of the object can be effectively removed.

The peripheral speed of one of the cleaning brushes is larger than the transport speed of the object, and the speed difference is preferably 1 m / min or more and 30 m / min or less. By setting the peripheral speed of one of the cleaning brushes as described above in this way, the upstream side in the transport direction is likely to lift burrs that are floating away from the object, so that burrs can be removed more effectively. ..

The amount of pushing of the pair of cleaning brushes against one of the surfaces is preferably 0.3 mm or more and 3 mm or less. By setting the pushing amount within the above range in this way, the tip of the brush easily enters between the floating portion of the burr and the surface of the object, so that the burr is easily scraped. Therefore, burrs can be removed more effectively.

It is preferable that the pair of cleaning brushes are rotationally driven and the contact portion vibrates in the direction of the rotation axis. By vibrating the cleaning brush in the direction of the rotation axis in this way, it becomes easier to scrape burrs that are floating away from the object along the direction perpendicular to the transport direction, so that burrs can be removed more effectively. it can.

A cleaning roller that comes into contact with the one surface in a charged state is provided, and the rotation direction of the cleaning roller at the contact portion with the one surface is forward with respect to the transport direction of the object. It is preferable that the one cleaning brush, the other cleaning brush, and the cleaning roller are arranged in this order from the upstream side in the transport direction, and the other cleaning brush comes into contact with each other over the width direction of the one surface. By configuring the cleaning device as described above, burrs can be effectively removed, and foreign matter adhering to one surface of the object, including the removed burrs, can be effectively removed regardless of its size. be able to. Moreover, since the cleaning device can be composed of a total of three cleaning brushes and cleaning rollers, it is easy to miniaturize.

Here, the "pushing amount" is a value obtained by subtracting the distance between the rotation axis of the cleaning brush and the surface of the object from the radius of the cleaning brush. If this number is positive, the bristles of the cleaning brush come into contact with the surface of the object.

As described above, the cleaning device of the present invention can effectively remove burrs generated on the surface of an object.

It is a schematic top view which shows the roller structure of the cleaning apparatus which concerns on one Embodiment of this invention. It is a schematic side view which shows the roller structure of the cleaning apparatus of FIG. It is a schematic side view which shows the structure of the 1st cleaning unit of the cleaning apparatus of FIG. It is a schematic top view which shows the roller structure of the cleaning apparatus different from FIG. It is a schematic side view which shows the roller structure of the cleaning apparatus of FIG. It is a schematic side view which shows the structure of the 2nd cleaning brush and the cleaning roller of FIG. It is a schematic side view which shows the structure of the 2nd cleaning brush and the cleaning roller of FIG. 4 when the transportation of an object is stopped.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

The cleaning device 1 shown in FIGS. 1 and 2 is a cleaning device that cleans both sides of the sheet-shaped object S to be conveyed. The cleaning device 1 includes a first cleaning unit 10 and a second cleaning unit 20.

(Object)
The object S to be cleaned by the cleaning device 1 is not particularly limited as long as it is in the form of a sheet. For example, examples of the object S include an FPD glass substrate, a printed circuit board on which electronic components are mounted, a resin thin plate, a metal thin plate, a film material, and a laminated product thereof. As the object S, as shown in FIG. 1, one having a burr S1 is preferable, and a resin thin plate, a metal thin plate, or a laminated one thereof can be mentioned. The cleaning device 1 is particularly effective when the burr S1 is a whiskers.

The whiskers have a thread-like or long plate-like shape, and the length direction thereof easily coincides with the length direction (transportation direction) of the object S, and occurs mainly on both side edges of the surface of the object S. easy. Further, one end of the beard burr is connected to the surface of the object S, and the other end is floating from the surface of the object S. Therefore, as shown in FIGS. 1 and 2, the burr S1 is mainly connected to both side edges of the object S along the transport direction (arrow directions in FIGS. 1 and 2), and the upstream side is connected to the object S and is downstream. A mustache burr S1a whose side is floating from the surface of the object S (hereinafter, also referred to as "reverse direction mustache burr S1a") and a mustache burr S1b whose downstream side is connected to the object S along the transport direction and whose upstream side is floating from the surface of the object S. Hereinafter, it is also referred to as “forward direction mustache burr S1b”). Hereinafter, the case where the object S has burrs S1 (reverse burrs S1a and forward burrs S1b) as shown in FIGS. 1 and 2 will be described as an example, but the object S of the cleaning device 1 has the burrs. It does not mean that you are limited to what you have.

Further, the object S may be a film-like object having flexibility or a plate-like object having low flexibility. In this respect, the average thickness of the object S is not particularly limited, but the lower limit of the average thickness of the object S is, for example, preferably 20 μm, more preferably 50 μm. If the average thickness of the object S is less than the above lower limit, it may be difficult to transport the object S.

The object S is transported at a constant speed in the transport directions shown in FIGS. 1 and 2 by a drive device (not shown) installed outside the cleaning device 1. The transport speed of the object S is not particularly limited, but the lower limit of the transport speed of the object S is preferably 5 m / min, more preferably 10 m / min. On the other hand, the upper limit of the transport speed of the object S is preferably 30 m / min, more preferably 20 m / min. If the transport speed of the object S is less than the above lower limit, the cleaning efficiency and thus the productivity of the object S may decrease. On the contrary, if the transport speed of the object S exceeds the above upper limit, the power consumption may become too large.

The object S may have tabs (not shown) protruding in the width direction on both side edges. This tab moves while being sandwiched between guides described later when the object S passes through the first cleaning unit 10 and the second cleaning unit 20. As a result, the object S is fixed, and both sides of the object S can be effectively cleaned. The tab configuration of the object S is not particularly limited as long as it can be guided by the guide, but for example, a configuration in which a plurality of rectangular protrusions are discretely arranged in a plan view can be used.

[1st cleaning unit]
As shown in FIG. 3, the first cleaning unit 10 includes a pair of cleaning brushes (first cleaning brush 11 and second cleaning brush 12) and a pair of rollers (first roller 13 and second roller 14). .. The first cleaning unit 10 includes a dust collecting roller 15 (first dust collecting roller 15a and a second dust collecting roller 15b), a scraper 16 (first scraper 16a and a second scraper 16b), and a foreign matter guiding plate 17 (first dust collecting roller 16a). A foreign matter guiding plate 17a and a second foreign matter guiding plate 17b), a foreign matter discharging portion 18, and a frame 19 for storing these are provided.

<Cleaning brush>
The pair of cleaning brushes (first cleaning brush 11 and second cleaning brush 12) have, for example, a roller shape and are rotationally driven. The rotation direction of the first cleaning brush 11 at the contact portion with one surface of the object S is opposite to the transport direction of the object S, and the contact portion with the one surface of the second cleaning brush 12 The direction of rotation is forward with respect to the transport direction of the object S. That is, in the cleaning device 1, the rotation direction of one of the pair of cleaning brushes (second cleaning brush 12) at the contact portion with the one surface is relative to the transport direction of the object S. It is a forward direction, and the direction of rotation of the other cleaning brush (first cleaning brush 11) at the contact portion with the one surface is opposite to the transport direction of the object S.

(1st cleaning brush)
As shown in FIG. 3, the first cleaning brush 11 has a columnar core metal 11a and a brush portion 11b formed of a plurality of bristles and provided on the peripheral surface of the core metal 11a. The brush portion 11b may be configured by directly planting a plurality of bristles on the peripheral surface of the core metal 11a or by winding a brushed woven fabric around the surface of the core metal 11a.

Since the rotation direction of the first cleaning brush 11 at the contact portion with one of the above surfaces is opposite to the transport direction of the object S, it is possible to mainly remove the reverse whiskers S1a. That is, since the rotation direction of the first cleaning brush 11 is opposite, the bristles of the brush portion 11b come into contact with the burr S1 from the downstream side in the transport direction. Since the downstream side of the reverse beard burr S1a floats from the surface of the object S along the transport direction, the bristles of the brush portion 11b easily enter the gap and push up the reverse beard burr S1a upward. S1a can be stripped from the object S.

Hereinafter, the configuration of the first cleaning brush 11 will be described.

The core metal 11a is made of a conductive material. Examples of the conductive material include metal materials such as stainless steel and aluminum.

The central axis of the core metal 11a is the rotation axis of the first cleaning brush 11. In the cleaning device 1, the rotation axis is substantially perpendicular to the transport direction and substantially parallel to one surface of the object S. Note that "substantially parallel to the surface" means that the angle formed by the surface is within ± 10 °, and "approximately perpendicular to the transport direction" means that the angle formed by the transport direction is 90 ° ± 10. It means that it is within °.

The diameter (average diameter) of the core metal 11a is appropriately determined from the strength of the bristles of the brush portion 11b and the like, and is, for example, 6 mm or more and 16 mm or less. The "average" refers to the average value of the amounts measured at any 10 points. Hereinafter, the same applies throughout the present specification.

The length of the core metal 11a is a length that can cover the distribution of the object S of the burr S1 to be removed in the width direction.

The brush portion 11b is provided on at least both side edges of one of the above surfaces. As a result, the first cleaning brush 11 can come into contact with at least both side edges of one surface of the object S. The region where the brush portion 11b contacts one surface of the object S is preferably a range that covers at least 1/5 in the width direction from at least both side edges of the one surface in a plan view, and 1/3. It is more preferable to cover the area. By covering the above range, it is possible to suppress the omission of removal of the burr S1 while reducing the contact resistance between the brush portion 11b and one surface of the object S.

On the other hand, the brush portion 11b may be provided over the entire length of the core metal 11a. In this case, since the first cleaning brush 11 comes into contact with the object S over the width direction of one surface, the dust removing effect on the surface of the object S can be obtained.

The bristles forming the brush portion 11b are preferably those to which foreign matter is easily physically attached, and examples thereof include fibers made of synthetic resin. Examples of the synthetic resin include polyester, polyamide, polypropylene, and fluorine-containing resins such as tetrafluorethylene, chlorotrifluorylene, polytetrafluorethylene, and polychlorotrifluorethylene. Among them, polyester is preferable because it is easy to secure appropriate rigidity and the removal efficiency of burr S1 is high.

Further, the bristles forming the brush portion 11b are preferably those capable of being charged with an electric charge capable of adsorbing foreign substances by the force of an electric field, and are synthetic containing a conductive material such as carbon black, carbon fiber, metal powder, or metal whisker. Resin fibers can be preferably used. By using the bristles forming the brush portion 11b to which foreign matter easily adheres, the burr S1 removed from one surface of the object S can be recovered as it is, so that the burr S1 becomes the foreign matter again on the object S. Adhesion can be prevented. It is preferable that the first cleaning brush 11 is charged and used, but the first cleaning brush 11 does not necessarily have to be charged because foreign matter adheres to the brush portion 11b even if the force of the electric field does not act.

The cross-sectional shape of the hair of the brush portion 11b is not particularly limited, and as the brush portion 11b, for example, a brush portion 11b having a circular cross-sectional shape, an elliptical shape, a star shape, or the like can be used. Further, the outer shape of the brush portion 11b is not particularly limited, and the brush portion 11b may have, for example, a linear outer shape, a wavy curve shape, a shape formed by combining a curved line and a straight line, or the like. it can. From the viewpoint of enhancing the effect of removing the burr S1 of the brush portion 11b, as the bristles forming the brush portion 11b, for example, those having a star-shaped cross section can be preferably used.

As the lower limit of the average length of the bristles of the brush portion 11b, 3 mm is preferable, and 4 mm is more preferable. On the other hand, the upper limit of the average length of the bristles of the brush portion 11b is preferably 15 mm, more preferably 10 mm. If the average length of the bristles of the brush portion 11b is less than the above lower limit, the bristles may not sufficiently enter the gap between the bristles S1 and the surface of the object S, and burrs S1 that cannot be removed may occur. On the contrary, if the average length of the bristles of the brush portion 11b exceeds the above upper limit, the flexibility of the bristles becomes too large and the burr S1 may not be scraped off.

As the lower limit of the rigidity index of the bristles of the

brush portion

11b, 20 is preferable, and 30 is more preferable. On the other hand, as the upper limit of the rigidity index of the bristles of the brush portion 11b, 100 is preferable, and 75 is more preferable. If the rigidity index of the bristles of the brush portion 11b is less than the above lower limit, the removal efficiency of the burr S1 may decrease. On the contrary, if the rigidity index of the bristles of the brush portion 11b exceeds the above upper limit, the surface of the object S may be damaged.

As the lower limit of the fineness of the hair of the brush portion 11b, 4D is preferable, and 5D is more preferable. On the other hand, as the upper limit of the fineness of the hair of the brush portion 11b, 13D is preferable, and 10D is more preferable. If the fineness of the bristles of the brush portion 11b is less than the above lower limit, the rigidity may be insufficient, and the removal efficiency of the burr S1 and the removal efficiency of foreign matter may decrease. On the contrary, if the fineness of the bristles of the brush portion 11b exceeds the above upper limit, the surface of the object S may be damaged.

The lower limit of the diameter of the first cleaning brush 11 (the sum of the diameter of the core metal 11a and the average length of the bristles of the brush portion 11b) is preferably 15 mm, more preferably 20 mm. On the other hand, the upper limit of the diameter of the first cleaning brush 11 is preferably 50 mm, more preferably 45 mm. If the diameter of the first cleaning brush 11 is less than the above lower limit, the bristles of the brush portion 11b cannot be sufficiently secured, and burrs S1 that cannot be removed may occur. On the contrary, if the diameter of the first cleaning brush 11 exceeds the above upper limit, the cleaning device 1 may become unnecessarily large.

As the lower limit of the pushing amount of the first cleaning brush 11, 0.3 mm is preferable, and 0.4 mm is more preferable. On the other hand, as the upper limit of the pushing amount of the first cleaning brush 11, 3 mm is preferable, and 2 mm is more preferable. If the pushing amount of the first cleaning brush 11 is less than the above lower limit, the burr S1 may not be sufficiently scraped off. On the contrary, when the pushing amount of the first cleaning brush 11 exceeds the above upper limit, the bristles strongly hit one surface of the object S, so that the bristles move backward (downstream in the transport direction) before the bristles abut on the burr S1. It bends to the side). Therefore, the bristles may not sufficiently enter the gap between the burr S1 and the surface of the object S, resulting in burr S1 that cannot be removed. The pushing amount can be controlled by adjusting the distance between the rotation shaft of the first cleaning brush 11 and the rotation shaft of the first roller 13, which will be described later, according to the thickness of the object S.

As the lower limit of the peripheral speed of the first cleaning brush 11, 1 m / min is preferable, and 3 m / min is more preferable. On the other hand, the upper limit of the peripheral speed of the first cleaning brush 11 is preferably 30 m / min, more preferably 15 m / min. If the peripheral speed of the first cleaning brush 11 is less than the above lower limit, the burr S1 on one surface of the object S may not be sufficiently scraped off. On the contrary, when the peripheral speed of the first cleaning brush 11 exceeds the above upper limit, the frictional force between the brush portion 11b and one surface of the object S becomes large, so that the transport speed of the object S cannot be maintained. There is a risk.

It is preferable that the first cleaning brush 11 is rotationally driven and the contact portion vibrates in the direction of the rotation axis. By vibrating the first cleaning brush 11 in the direction of the rotation axis in this way, it becomes easy to scrape the burr S1 that is floating away from the object S along the direction perpendicular to the transport direction. Can be removed more effectively.

When the first cleaning brush 11 is vibrated, the lower limit of its amplitude is preferably 1 mm, more preferably 2 mm. On the other hand, as the upper limit of the amplitude, 10 mm is preferable, and 5 mm is more preferable. If the amplitude is less than the above lower limit, the effect of improving the removal of the burr S1 due to vibration may not be sufficiently obtained. On the contrary, when the amplitude exceeds the upper limit, it is necessary to move the first cleaning brush 11 at high speed in the width direction of the object S in order to obtain a desired vibration cycle, and the manufacturing cost of the cleaning device 1 is reduced. There is a risk that it will be unnecessarily large and that power consumption will increase unnecessarily.

The vibration cycle also depends on the transport speed of the object S, but when the time required for the object S to move 1 m is t (seconds), the upper limit of the vibration cycle is preferably 1/3 t. , 1 / 5t is more preferable. If the vibration cycle is less than the above lower limit, the angle of contact with the burr S1 from an oblique direction becomes shallow, so that the effect of improving the removal of the burr S1 by vibration may not be sufficiently obtained. The lower limit of the vibration cycle is not particularly limited, but may be, for example, 1 / 20t. If the vibration cycle is less than the above lower limit, it becomes necessary to move the first cleaning brush 11 at high speed in the width direction of the object S, which may unnecessarily increase the manufacturing cost of the cleaning device 1 and increase power consumption. It may increase unnecessarily.

(2nd cleaning brush)
As shown in FIG. 3, the second cleaning brush 12 has a columnar core metal 12a and a brush portion 12b formed of a plurality of bristles and provided on the peripheral surface of the core metal 12a. The second cleaning brush 12 may be arranged so as to be in contact with the first cleaning brush 11, but the second cleaning brush 12 is arranged apart from the first cleaning brush 11, that is, the pair of cleaning brushes are separated from each other. It is preferable that they are arranged.

Since the rotation direction of the second cleaning brush 12 at the contact portion with one of the above surfaces is the forward direction with respect to the transport direction of the object S, the forward whiskers S1b can be mainly removed. That is, since the rotation direction of the second cleaning brush 12 is the forward direction, the bristles of the brush portion 12b come into contact with the burr S1 from the upstream side in the transport direction. Since the upstream side of the forward beard burr S1b floats from the surface of the object S along the transport direction, the bristles of the brush portion 12b easily enter the gap and push up the forward beard burr S1b upward. S1b can be stripped from the object S.

Hereinafter, the configuration of the second cleaning brush 12 will be described. Since the second cleaning brush 12 has a different rotation direction from the first cleaning brush 11, it can be configured in the same manner as the first cleaning brush 11 except that its peripheral speed is different and the configuration due to this difference is different. Hereinafter, the above differences will be described, and detailed description of the same configuration as that of the first cleaning brush 11 will be omitted.

The peripheral speed of the second cleaning brush 12 is preferably higher than the transport speed of the object S. By making the peripheral speed of the second cleaning brush 12 larger than the transport speed of the object S in this way, it is possible to more reliably insert the bristles of the brush portion 12b into the gap between the burr S1 and the surface of the object S. it can.

The lower limit of the speed difference between the peripheral speed of the second cleaning brush 12 and the transport speed of the object S is preferably 1 m / min, more preferably 3 m / min. On the other hand, the upper limit of the speed difference is preferably 30 m / min, more preferably 15 m / min. If the speed difference is less than the lower limit, the burr S1 on one surface of the object S may not be sufficiently scraped off. On the contrary, if the speed difference exceeds the upper limit, the frictional force between the brush portion 12b and one surface of the object S becomes large, so that the transport speed of the object S may not be maintained.

As described above, the absolute value of the peripheral speed is different between the first cleaning brush 11 and the second cleaning brush 12, and the peripheral speed of the second cleaning brush 12 is generally set to be larger. As a method of increasing the peripheral speed of the second cleaning brush 12, there is a method of increasing the rotation speed of the second cleaning brush 12 by making the first cleaning brush 11 and the second cleaning brush 12 have the same diameter. In this method, since the same type of cleaning brush can be used as the first cleaning brush 11 and the second cleaning brush 12, the cost reduction and simplification of the production of the cleaning device 1 are promoted. Further, as another method, as shown in FIG. 3, a method in which the diameter of the second cleaning brush 12 is made larger than the diameter of the first cleaning brush 11 can be mentioned. At this time, the ratio of the diameters may be determined so as to be a ratio of the peripheral speeds so that a desired peripheral speed can be obtained at the same rotation speed. In this method, since the cleaning device 1 can be operated at the same rotation speed, operation control can be facilitated.

<Laura>
The pair of rollers comes into contact with the other surface of the object S so as to face the pair of cleaning brushes. Specifically, the first roller 13 contacts the other surface of the object S so as to face the first cleaning brush 11, and the second roller 14 faces the other surface of the object S and faces the second cleaning brush 12. And make contact.

(1st roller)
The first roller 13 is rotatably arranged at a position substantially parallel to and facing the first cleaning brush 11.

The first roller 13 is carried around with the transportation of the object S. That is, the first roller 13 rotates due to the frictional force between the first roller 13 and the object S as the object S moves, and the rotation axis of the first roller 13 itself is not rotationally driven.

Part or all of the first roller 13 is made of a conductive material. Examples of such a conductive material include a metal material such as stainless steel and aluminum, and a conductive resin. In order to accurately control the amount of pushing of the brush portion 11b of the first cleaning brush 11 with respect to the object S, it is advantageous that the hardness of the first roller 13 that holds the object S on the lower surface thereof is high. From this point of view, as the conductive material, a metal material whose hardness can be easily secured is preferable. The first roller 13 may be formed only of such a conductive material, and the outer peripheral surface of the core metal formed of such a conductive material is covered with an insulating layer such as a synthetic resin. May be good.

When the first cleaning brush 11 is charged and used, the first roller 13 is grounded. As a result, the adsorption effect of the electric field force of the first cleaning brush 11 is promoted, and the burr S1 removed from one surface of the object S is easily attracted to the first cleaning brush 11. Alternatively, the first roller 13 may be configured so that no voltage is applied to the first roller 13.

The length of the first roller 13 may be the same as the length of the core metal 11a of the first cleaning brush 11. The diameter of the first roller 13 is not particularly limited, but may be the same as the diameter of the first cleaning brush 11.

(2nd roller)
The second roller 14 is rotatably arranged at a position substantially parallel to and facing the second cleaning brush 12.

Since the second roller 14 can be configured in the same manner as the first roller 13, detailed description thereof will be omitted. When the diameter of the second cleaning brush 12 is larger than the diameter of the first cleaning brush 11, the diameter of the second roller 14 is preferably the same as the diameter of the first roller 13. By making the diameters of the first roller 13 and the second roller 14 the same, it is possible to facilitate the horizontal transportation of the object S.

<Dust collection roller, scraper, foreign matter guide plate and foreign matter discharge part>
The dust collecting roller 15 is arranged substantially parallel to the pair of cleaning brushes so that the surface of the dust collecting roller 15 comes into contact with the outer peripheral side of the pair of cleaning brushes while being charged and rotationally driven. Further, the scraper 16 scrapes the foreign matter adhering to the surface of the dust collecting roller 15, and the foreign matter guiding plate 17 guides the scraped foreign matter to the foreign matter discharging section 18 via the foreign matter collecting section 19a described later. The foreign matter discharging unit 18 discharges the foreign matter to the outside of the first cleaning unit 10.

The dust collecting roller 15, the scraper 16, the foreign matter guiding plate 17, and the foreign matter discharging portion 18 are housed inside the frame 19 together with a pair of cleaning brushes and a pair of rollers. The frame 19 is substantially orthogonal to the transport direction of the object S, and is disposed substantially parallel to the transport direction and substantially perpendicular to the surface of the object S with the front plate and the rear plate arranged before and after the transport direction. It has a pair of side plates and a top plate arranged substantially parallel to the surface of the object S. The top plate is connected to the upper ends of the pair of side plates, the front plate, and the rear plate.

In the first cleaning unit 10 shown in FIG. 3, the first dust collecting roller 15a that contacts the outer peripheral side of the first cleaning brush 11 and the second dust collecting roller 15b that contacts the outer peripheral side of the second cleaning brush 12 are independent. A pair of scrapers 16 (a pair of first scrapers 16a and a pair of second scrapers 16b) are provided on each dust collecting roller 15. Further, each scraper 16 is provided with a foreign matter guide plate 17 (a pair of first foreign matter guide plates 17a and a pair of second foreign matter guide plates 17b). Hereinafter, the first dust collecting roller 15a, the first scraper 16a, and the first foreign matter guiding plate 17a will be described, but the second dust collecting roller 15b, the second scraper 16b, and the second foreign matter guiding plate 17b can have the same configuration. ..

(1st dust collection roller)
A conductive material is used as the material of the first dust collecting roller 15a. Examples of such a conductive material include metal materials such as stainless steel and aluminum. When a conductive material such as aluminum that is easily oxidized is used as the first dust collecting roller 15a, it is preferable to perform a corrosion-resistant plating treatment such as nickel plating or gold plating on the surface of the first dust collecting roller 15a.

When charging the first cleaning brush 11, a voltage higher than the voltage applied to the first cleaning brush 11 is applied to the first dust collecting roller 15a. As a result, the surface of the first dust collecting roller 15a has a higher potential than the outer peripheral side of the first cleaning brush 11, so that foreign matter adhering to the first cleaning brush 11 is adsorbed on the surface of the first dust collecting roller 15a, and the first dust collecting roller 15a is first. Foreign matter adhering to the cleaning brush 11 moves to the first dust collecting roller 15a. Thereby, the work of removing the foreign matter accumulated on the first cleaning brush 11 can be omitted or reduced.

The rotation direction of the first dust collecting roller 15a may be any direction.

(1st scraper)
The first scraper 16a is, for example, a rectangular plate, and has a portion that can come into contact with the surface of the first dust collecting roller 15a in the axial direction. In the first cleaning unit 10 of FIG. 3, a pair of first scrapers 16a are provided on both sides of the first dust collecting roller 15a in a side view, but the number of first scrapers 16a may be one. Here, the long side of the first scraper 16a in contact with the surface of the first dust collecting roller 15a is referred to as a tip portion.

The first scraper 16a is formed of an elastic body made of a synthetic resin such as thermosetting polyurethane. As the first dust collecting roller 15a rotates, the foreign matter adhering to the surface of the first dust collecting roller 15a is scraped off by the tip of the first scraper 16a that comes into contact with the surface of the first dust collecting roller 15a. As a result, the surface of the first dust collecting roller 15a is in a clean state with foreign matter removed.

(1st foreign matter guide plate)
The first foreign matter guiding plate 17a is, for example, a rectangular plate, so that one surface faces upward from directly below the first scraper 16a to directly above the foreign matter collecting portion 19a provided on the frame 19 described later. It is arranged. Further, the first foreign matter guiding plate 17a is provided so as to be inclined so that the foreign matter collecting portion 19a side is lowered. With this arrangement, the foreign matter scraped off by the first scraper 16a falls on the surface of the first foreign matter guiding plate 17a and is guided directly above the foreign matter collecting portion 19a by the inclination of the first foreign matter guiding plate 17a. It falls to 19a and is collected.

In the first cleaning unit 10 shown in FIG. 3, a dust collecting roller 15, a scraper 16 and a foreign matter guiding plate 17 are independently provided for a pair of cleaning brushes, but one pair of dust collecting rollers 15 is provided. By arranging the cleaning brush so as to be in contact with the outer peripheral side of the cleaning brush, the dust collecting roller 15, the scraper 16 and the foreign matter guiding plate 17 can be shared.

(Foreign matter collection part)
A foreign matter collecting portion 19a is provided at the lower part of the front plate and the rear plate of the frame 19 and the lower center of the frame 19. In the first cleaning unit 10 shown in FIG. 3, the foreign matter collecting unit 19a is configured as a part of the frame 19, but it can also be configured independently of the frame 19.

The foreign matter collecting unit 19a is provided directly below the lower end of the foreign matter guiding plate 17 provided at an angle, and collects foreign matter falling from the foreign matter guiding plate 17. One foreign matter collecting unit 19a may be provided for one foreign matter guiding plate 17, but two or more foreign matter collecting portions 19a like the foreign matter collecting portion 19a at the lower center of the frame 19 in FIG. It may be provided so as to collect the foreign matter from the foreign matter guide plate 17.

The shape of the foreign matter collecting portion 19a is not particularly limited, but it is preferably dish-shaped, that is, a flat plate having an upwardly bent end. By making the foreign matter collecting portion 19a into a dish shape, it is possible to prevent the collected foreign matter from being dissipated to the outside of the foreign matter collecting portion 19a.

(Foreign matter discharge part)
The foreign matter discharging unit 18 discharges the foreign matter collected by the foreign matter collecting unit 19a to the outside of the first cleaning unit 10. The foreign matter discharging unit 18 is provided in each foreign matter collecting unit 19a. In the first cleaning unit 10 shown in FIG. 3, the foreign matter discharging unit 18 is configured as a suction duct, and the foreign matter collected in the foreign matter collecting unit 19a is sucked through the suction duct by a suction device (not shown), and the first foreign matter is sucked. Discharge to the outside of the cleaning unit 10.

The configuration of the foreign matter discharging unit 18 is not limited to the suction duct, and other configurations such as a configuration for sweeping out with a brush or the like can be adopted.

[Second cleaning unit]
The second cleaning unit 20 includes a pair of cleaning brushes (third cleaning brush 21 and fourth cleaning brush 22), a pair of rollers (third roller 23 and fourth roller 24), a dust collecting roller, a scraper, and a frame. And.

The pair of cleaning brushes (third cleaning brush 21 and fourth cleaning brush 22) are formed of a columnar core metal and a plurality of bristles, like the pair of cleaning brushes of the first cleaning unit 10, and are formed of the core metal. It has a brush portion provided on the peripheral surface of the object S, and is rotationally driven so that the brush portion contacts at least both side edges of the other surface of the object S. Further, the direction of rotation of the third cleaning brush 21 at the contact portion with the other surface is opposite to the transport direction of the object S, and at the contact portion of the fourth cleaning brush 22 with the other surface. The rotation direction of the object S is forward with respect to the transport direction of the object S. That is, in the cleaning device 1, the rotation direction of one of the pair of cleaning brushes (fourth cleaning brush 22) at the contact portion with the other surface is relative to the transport direction of the object S. It is a forward direction, and the direction of rotation of the other cleaning brush (third cleaning brush 21) at the contact portion with the other surface is opposite to the transport direction of the object S.

The pair of rollers comes into contact with one surface of the object S facing the pair of cleaning brushes. Specifically, the third roller 23 contacts one surface of the object S facing the third cleaning brush 21, and the fourth roller 24 faces one surface of the object S facing the fourth cleaning brush 22. And make contact.

Since the second cleaning unit 20 can be configured in the same manner as the first cleaning unit 10 except that the surfaces of the objects S that the pair of cleaning brushes and the pair of rollers come into contact with are different as described above, other detailed description will be omitted. ..

〔guide〕
When the object S has a tab, the cleaning device 1 preferably includes a guide (not shown). In this case, the guide may have a first guide attached to the first cleaning unit 10 and a second guide attached to the second cleaning unit 20. By providing a guide for each cleaning unit in this way, it is easy to unitize the cleaning device 1, and the manufacturing efficiency of the cleaning device 1 can be improved. Hereinafter, since the first guide and the second guide can be configured in the same manner, the first guide will be described as an example.

The first guide is composed of a pair of strips arranged on both sides of the object S along the transport direction, for example. Each strip has two plates facing each other, and the tab of the object S can pass between the two plates. As the plate, a metal plate such as stainless steel can be used.

It is preferable that the ends of the above two plates on the upstream side in the transport direction widen in the vertical direction toward the upstream side. With this configuration, the tabs that have moved from the upstream side in the transport direction can be reliably sandwiched between the two plates.

Further, the widths of the above two plates are adjusted in the vertical direction so that they both come into contact with the tabs at least at the downstream end in the transport direction. With this configuration, it is possible to prevent the object S from swinging in the vertical direction, so that the pair of cleaning brushes and the pair of rollers can be reliably brought into contact with the object S.

The pair of strips may be continuous in the width direction of the object S, but are not arranged at a position where at least the pair of cleaning brushes and the pair of rollers come into contact with the object S.

In the above embodiment, the case where the first cleaning unit 10 has the first guide and the second cleaning unit 20 has the second guide has been described, but the first guide and the second guide are integrated into one. It can also be provided as a guide.

〔advantage〕
The cleaning device 1 removes burrs S1 whose upstream side in the transport direction is floating away from the object S by the second cleaning brush 12 and the fourth cleaning brush 22 which are rotationally driven in the forward direction, and is rotationally driven in the opposite direction. The first cleaning brush 11 and the third cleaning brush 21 can remove the burr S1 whose downstream side in the transport direction is floating away from the object S. Therefore, since the cleaning device 1 can remove the burrs S1 that are floating and separated in any direction, the burrs S1 generated on both sides of the object S can be effectively removed.

[Second Embodiment]
Hereinafter, the second embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

The cleaning device 2 shown in FIGS. 4 and 5 is a cleaning device that cleans one surface of the sheet-shaped object S to be conveyed.

The cleaning device 2 has a pair of cleaning brushes (first cleaning brush 41 and a second cleaning brush 42) that are rotationally driven in contact with the one surface, and the pair of cleanings on the other surface of the object S. A pair of rollers (first roller 43 and second roller 44) that come into contact with the brush, a cleaning roller 45 that comes into contact with one of the above surfaces while the surface is charged, and the other surface of the object S. A third roller 46 that faces the cleaning roller 45 and comes into contact with the cleaning roller 45 is provided.

In the cleaning device 2, the rotation direction of one of the pair of cleaning brushes (first cleaning brush 41) at the contact portion with the one surface is forward with respect to the transport direction of the object S. The direction of rotation of the other cleaning brush (second cleaning brush 42) at the contact portion with the one surface is opposite to the transport direction of the object S. Further, the rotation direction of the cleaning roller 45 at the contact portion with the one surface is the forward direction with respect to the transport direction of the object S.

In the cleaning device 2, the one cleaning brush (first cleaning brush 41), the other cleaning brush (second cleaning brush 42), and the cleaning roller 45 are arranged in this order from the upstream side in the transport direction. .. Further, the other cleaning brush (second cleaning brush 42) is in contact with the other cleaning brush in the width direction of the one surface.

<1st cleaning brush>
Since the first cleaning brush 41 can be configured in the same manner as the second cleaning brush 12 in the first embodiment, detailed description thereof will be omitted. Since the rotation direction of the first cleaning brush 41 at the contact portion with one of the above surfaces is the forward direction with respect to the transport direction of the object S, the forward whisker burr S1b can be mainly removed.

<Second cleaning brush>
The second cleaning brush 42 is in contact with the object S over the width direction of one surface as described above. Except for this point, the second cleaning brush 42 can be configured in the same manner as the first cleaning brush 11 in the first embodiment, and therefore detailed description of other configurations will be omitted.

The second cleaning brush 42 is rotationally driven so that the rotation direction at the contact portion with one surface of the object S is opposite to the transport direction of the object S. Therefore, the second cleaning brush 42 can mainly remove the reverse whiskers S1a. Further, since the second cleaning brush 42 is in contact with the object S over the width direction of one surface, when it comes into contact with one surface of the object S, it adheres to one surface of the object S. Foreign matter is aroused. Since the relatively large millimeter-sized foreign matter is scraped up by the above-mentioned scraping, the relatively large millimeter-sized foreign matter is effectively removed from one surface of the object S by the second cleaning brush 42.

<Cleaning roller>
As shown in FIG. 5, the cleaning roller 45 has a cylindrical core metal 45a, a cylindrical inner layer portion 45b that covers the peripheral surface of the core metal 45a, and a thin film cylindrical portion that covers the outer peripheral surface of the inner layer portion 45b. It has an outer layer portion 45c.

The core metal 45a is made of a conductive material. Examples of the conductive material include metal materials such as stainless steel and aluminum.

The central axis of the core metal 45a serves as the rotation axis of the cleaning roller 45 and is rotatably arranged. In the cleaning device 2, the rotation axis is substantially perpendicular to the transport direction and substantially parallel to one surface of the object S. The cleaning roller 45 rotates with the transportation of the object S. That is, the cleaning roller 45 rotates due to the frictional force between the cleaning roller 45 and the object S as the object S moves, and the rotation shaft of the cleaning roller 45 is not rotationally driven.

As the material of the inner layer portion 45b, an elastic member having conductivity is used. Examples of such an elastic member include polyester-based urethane containing carbon.

The material of the outer layer portion 45c may be any material that can be charged with a charge that adsorbs foreign matter adhering to one surface of the object S by the force of an electric field, and examples thereof include polyurethanes such as acrylic mixed polyurethane and fluorine mixed polyurethane. Be done. By forming the outer layer portion 45c with polyurethane, the abrasion resistance is excellent as compared with the case where the outer layer portion 45c is formed of silicone resin, butyl rubber, or the like, and contamination by a plasticizer or a low molecular weight substance can be reduced.

The acrylic mixed polyurethane contains polyester polyurethane or polyether polyurethane as a main component, and further consists of (1) thermoplastic polyurethane and silicon-acrylic copolymer resin, and (2) acrylic resin (for example, methacrylate-methyl methacrylate copolymer). It means a graft compound (a graft compound in which an aminoethyl group is grafted on the main chain) and a thermoplastic polyurethane, or (3) a mixture containing an acrylic resin, polyurethane and a fluorine-based surface coating agent. By using acrylic mixed polyurethane as the material of the outer layer portion 45c, foreign substances that are easily negatively charged can be easily removed from one surface of the object S. The "main component" is a component having the highest content, for example, a component contained in an amount of 50% by mass or more.

The above-mentioned fluorine-mixed polyurethane is mainly composed of polyurethane, and means a mixture containing thermoplastic polyurethane and urethane / fluorine copolymer. By using the fluorine-mixed polyurethane as the material of the outer layer portion 45c, foreign substances that are easily positively charged can be easily removed from the object S.

As the lower limit of the average thickness of the

outer layer portion

45c, 2 μm is preferable, and 5 μm is more preferable. On the other hand, the upper limit of the average thickness of the outer layer portion 45c is preferably 500 μm, more preferably 50 μm. If the average thickness of the outer layer portion 45c is less than the above lower limit, the surface of the cleaning roller 45 cannot be sufficiently charged, and the effect of adsorbing foreign matter may not be sufficiently obtained. On the contrary, if the average thickness of the outer layer portion 45c exceeds the above upper limit, good charging characteristics for adsorbing foreign matter may not be obtained.

As described above, the cleaning roller 45 rotates when the surface of the cleaning roller 45 comes into contact with the object S to be transported. That is, the cleaning roller 45 rotates at the contact portion with one surface of the object S so as to be in the forward direction with the transport direction of the object S. Since the cleaning roller 45 is charged, when one surface of the object S to be conveyed is close to the surface of the cleaning roller 45, foreign matter on one surface of the object S is attracted to the cleaning roller 45 by the force of the electric field. To. In the cleaning device 2, fine foreign matter can be effectively removed by adsorption to the surface of the cleaning roller 45 by the force of this electric field.

As the lower limit of the voltage applied to the cleaning roller 45 used by charging, for example, -400V is preferable, and -200V is more preferable. On the other hand, the applied voltage is, for example, less than 0V, preferably −50V or less. By setting the voltage applied to the cleaning roller 45 within the above range, relatively fine foreign matter can be efficiently removed. The reference potential (0V potential) of the applied voltage is the rotation axis of the third roller 46. The same applies to the reference potential of the applied voltage described below.

<Laura>
The first roller 43 is rotatably arranged at a position substantially parallel to and facing the first cleaning brush 41. The second roller 44 is rotatably arranged at a position substantially parallel to and facing the second cleaning brush 42. Further, the third roller 46 is rotatably arranged at a position substantially parallel to and facing the cleaning roller 45.

These rollers are grounded and rotate with the transportation of the object S. Since these rollers can be configured in the same manner as the first roller 13 of the first embodiment, detailed description thereof will be omitted.

<Other configurations>
The cleaning device 2 is arranged substantially parallel to the first cleaning brush 41, and has a first dust collecting roller that contacts the outer peripheral side of the first cleaning brush 41 with the surface charged, and the first dust collecting roller. A first scraper that scrapes off foreign matter adhering to the surface may be provided. Since the first dust collecting roller and the first scraper can be configured in the same manner as the first dust collecting roller 15a and the first scraper 16a of the first embodiment, detailed description thereof will be omitted.

Further, as shown in FIG. 6, the cleaning device 2 is arranged substantially in parallel with the brush roller 47, which is charged and rotationally driven to come into contact with the surface of the cleaning roller 45, and the second cleaning brush 42 and the brush roller 47. The first second dust collecting roller 48 that comes into contact with the outer peripheral side of the second cleaning brush 42 and the brush roller 47 with the surface charged, and the second scraper 49 that scrapes off foreign matter adhering to the surface of the second dust collecting roller 48. And further prepare.

(Brush roller)
The brush roller 47 is arranged substantially parallel to the cleaning roller 45.

The brush roller 47 has a columnar core metal 47a and a brush portion 47b formed of a plurality of bristles and provided on the peripheral surface of the core metal 47a.

As the core metal 47a and the brush portion 47b, for example, those having the same materials as the core metal 11a and the brush portion 11b of the first cleaning brush 11 described in the first embodiment can be used.

The rotationally driven brush roller 47 may rotate in any direction, but it is preferable that the directions of movement on the peripheral surfaces of the contact portion between the cleaning roller 45 and the brush roller 47 are opposite to each other. By rotating the brush roller 47 in this way, foreign matter adhering to the surface of the cleaning roller 45 is easily scraped off, so that the foreign matter is easily moved to the brush roller 47. In this case, the brush roller 47 is rotationally driven in the same rotational direction as the cleaning roller 45.

A voltage having the same polarity and a higher absolute value than the voltage applied to the cleaning roller 45 is applied to the brush roller 47. As a result, the outer peripheral side of the brush roller 47 has a higher potential than the surface of the cleaning roller 45, so that the foreign matter adhering to the surface of the cleaning roller 45 is adsorbed by the brush roller 47, and the foreign matter on the surface of the cleaning roller 45 moves to the brush roller 47. ..

As a specific lower limit of the voltage applied to the brush roller 47 (voltage applied to the core metal 47a), -800V is preferable, and -600V is more preferable. On the other hand, as the upper limit of the applied voltage, −200V is preferable, and −300V is more preferable.

(2nd dust collection roller)
The second dust collecting roller 48 is charged and rotationally driven, and is substantially parallel to the second cleaning brush 42 and the brush roller 47 so that the surface contacts the outer peripheral side of the second cleaning brush 42 and the outer peripheral side of the brush roller 47. Arranged.

The material of the second dust collecting roller 48 can be the same as that of the first dust collecting roller 15a described in the first embodiment.

The rotation direction of the second dust collecting roller 48 may be any direction. The second dust collecting roller 48 may be driven in a rotation direction in which foreign matter scraped from the surface of the second dust collecting roller 48 is easily collected by the second scraper 49 described later.

A voltage having the same polarity and a higher absolute value than the voltage applied to the brush roller 47 is applied to the second dust collecting roller 48. As a result, the surface of the second dust collecting roller 48 has a higher potential than the outer peripheral side of the second cleaning brush 42 and the brush roller 47, so that foreign matter adhering to the second cleaning brush 42 and the brush roller 47 becomes the second dust collecting roller. Foreign matter adhering to the surface of the 48 and adhering to the second cleaning brush 42 and the brush roller 47 moves to the second dust collecting roller 48. As a result, the work of removing foreign matter accumulated on the second cleaning brush 42 and the brush roller 47 can be omitted or reduced.

As a specific lower limit of the voltage applied to the second dust collecting roller 48, -1500V is preferable, and -1200V is more preferable. On the other hand, as the upper limit of the applied voltage, -400V is preferable, and -600V is more preferable. By setting the applied voltage within the above range, foreign matter adhering to the brush roller 47 can be adsorbed on the outer peripheral surface of the second dust collecting roller 48.

Further, as the lower limit of the absolute value of the difference between the voltage applied to the second dust collecting roller 48 and the voltage applied to the brush roller 47, 200 V is preferable, and 300 V is more preferable. On the other hand, as the upper limit of the absolute value of the above difference, 600V is preferable, and 500V is more preferable. By setting the above difference within the above range, foreign matter adhering to the brush roller 47 can be effectively adsorbed on the outer peripheral surface of the second dust collecting roller 48.

(2nd scraper)
The second scraper 49 is, for example, a rectangular plate, and has a portion that can come into contact with the surface of the second dust collecting roller 48 in the axial direction. As the second scraper 49, for example, the same as the first scraper 16a of the first embodiment can be used, and thus detailed description thereof will be omitted.

(Stop mechanism)
The cleaning device 2 may include a stop mechanism that operates when the object S is stopped. As the stop mechanism, for example, as shown in FIG. 7, a mechanism for moving the cleaning roller 45 to a position where it does not come into contact with the surface of the object S can be mentioned. Hereinafter, the stop mechanism shown in FIG. 7 will be described.

In this stop mechanism, when the transportation of the object S is stopped, the cleaning roller 45 is quickly moved upward so as to be in a non-contact state with the surface of the object S. Specifically, for example, a method of detecting that the transport speed of the object S has become 0 and moving the cleaning roller 45 upward according to this detection signal can be used, but the method is not limited to this method. Absent.

The moving distance for moving the cleaning roller 45 upward is not particularly limited as long as it is not in contact with the surface of the object S, but can be, for example, 1 mm or more and 10 mm or less. If the moving distance is less than the above lower limit, the cleaning roller 45 may come into contact with the surface of the object S. On the contrary, if the moving distance exceeds the upper limit, it may interfere with other components of the cleaning device 2. For example, when the cleaning roller 45 is moved upward, it comes into strong contact with the brush roller 47, but if the moving distance is equal to or less than the above upper limit, the bristles of the brush roller 47 are absorbed by bending, and the brush roller 47 is absorbed. Interference with the operation of 47 can be suppressed.

The operation of this stop mechanism will be described below. FIG. 6 shows the rotation direction of each roller when the object S is being conveyed. The cleaning roller 45 is configured to rotate around, and the transport of the object S attempts to rotate the cleaning roller 45 in the forward direction with respect to the transport direction of the object S, and the rotationally driven brush roller 47 is driven. The cleaning roller 45 tries to rotate in the direction opposite to the transport direction of the object S. The directions in which they try to rotate are opposite to each other, but since the brush roller 47 comes into contact with the cleaning roller 45 at the bristles, the force to rotate the brush roller 47 is weak, and the brush roller 47 is pushed into the cleaning roller 45. Since the amount is adjusted appropriately, the cleaning roller 45 rotates with respect to the object S.

If the transportation of the object S is stopped and the cleaning roller 45 is kept in contact with the object S, the transportation of the object S rotates the cleaning roller 45 in the forward direction with respect to the transportation direction of the object S. Since the force for causing the object S does not work, the brush roller 47 rotates the cleaning roller 45 in the direction opposite to the transport direction of the object S. In this case, as shown in FIG. 7, since the cleaning roller 45 rotates so as to push the object S back to the upstream side in the transport direction, if the cleaning roller 45 is kept in contact with the object S, the second There is a risk of wrinkling the object S with the cleaning brush 42. By moving the cleaning roller 45 to a position where it does not come into contact with the surface of the object S, the stop mechanism can suppress the occurrence of wrinkles on the object S by the cleaning roller 45.

The configuration of the stop mechanism is not limited to the method of moving the cleaning roller 45 upward, and for example, the configuration of moving the third roller 46 downward may be used.

〔guide〕
Even in the cleaning device 2, when the object S has a tab, it is preferable to provide a guide. Since the guide can be configured in the same manner as the first guide of the first embodiment, detailed description thereof will be omitted.

〔advantage〕
The cleaning device 2 can effectively remove the burr S1 and can effectively remove foreign matter adhering to one surface of the object S, including the removed burr S1, regardless of its size. Moreover, since the cleaning device 2 can be composed of a total of three cleaning brushes 41, a second cleaning brush 42, and a cleaning roller 45, it is easy to miniaturize the cleaning device 2.

[Other Embodiments]
The present invention is not limited to the above embodiment, and can be implemented in various modifications and improvements in addition to the above embodiment.

In the first embodiment described above, the case where the cleaning device cleans both sides of the object has been described, but the cleaning device of the present invention may clean only one side of the object. In this case, for example, the second cleaning unit can be omitted and only the first cleaning unit can be used.

On the contrary, in the second embodiment described above, the case where the cleaning device cleans one side of the object has been described, but the cleaning device of the present invention may clean both sides of the object. In this case, the cleaning device for cleaning both sides of the object further includes a pair of cleaning brushes that come into contact with the other surface of the object and a cleaning roller that contacts the other surface with the surface charged. It will be.

In the first embodiment, the cleaning brush having the opposite rotation direction is arranged on the upstream side in the transport direction of the object, and the cleaning brush having the forward rotation direction is arranged on the downstream side, but the order is reversed. That is, a cleaning brush having a forward rotation direction may be arranged on the upstream side in the transport direction of the object, and a cleaning brush having a reverse rotation direction may be arranged on the downstream side. Further, it is not necessary for the first cleaning unit and the second cleaning unit to have the same arrangement order, and the order may be different between the two. Further, a pair of cleaning brushes of the first cleaning unit and a pair of cleaning brushes of the second cleaning unit may be nested. Specifically, for example, a first cleaning brush that contacts one surface of an object and rotates in the forward direction, a second cleaning brush that contacts the other surface and rotates in the forward direction, and a second cleaning brush that contacts one surface and rotates in the opposite direction. It is also possible to arrange the rotating third cleaning brush and the fourth cleaning brush that comes into contact with the other surface and rotates in the opposite direction in this order.

In the above embodiment, the case where the rotation axes of the pair of cleaning brushes are substantially perpendicular to the transport direction of the object and substantially parallel to one surface of the object has been described. It does not have to be approximately perpendicular to the direction. That is, the rotation axis may have an inclination with respect to the width direction of the object. By arranging the rotation axis so as to be inclined with respect to the width direction of the object, that is, non-parallel and non-perpendicular with respect to the width direction, the same effect as when the pair of cleaning brushes are vibrated can be obtained. Be done.

In the second embodiment, the case where the first dust collecting roller is used to remove foreign matter from the first cleaning brush and the second dust collecting roller is used to remove foreign matter from the second cleaning brush and the cleaning roller has been described. The configuration of the dust collecting roller that performs the removal work is not limited to this. For example, a configuration in which a dust collecting roller is provided for each of the first cleaning brush, the second cleaning brush, and the cleaning roller, or a first dust collecting roller common to the foreign matter removing work of the first cleaning brush and the second cleaning brush is provided. A second dust collecting roller may be provided for the foreign matter removing work.

Further, the means for removing foreign matter is not limited to the configuration using the dust collecting roller or the like of the above embodiment, and other configurations can be adopted.

Hereinafter, the present invention will be described with reference to Examples, but the present invention is not limited to the following Examples.

<Optimization of brush hair>
For the purpose of selecting the characteristics required for the bristles of the brush portion of the cleaning brush suitable for deburring (hereinafter, also referred to as "brush bristles"), the deburring property and the foreign matter recovering property were evaluated.

As the material of the brush bristles, select conductive polyester that is relatively distant from the triboelectric order with the assumed foreign matter in the charging row, and prepare three types of cleaning brushes with brush bristles with different fineness and rigidity index. did. Table 1 shows the characteristics of the brush bristles of the prepared cleaning brush.

Six types of PET film, metal foil (copper and aluminum), acrylic plate and glass plate were prepared as objects for removing burrs and foreign substances. In addition to the burrs, four pieces of polyester fiber, copper powder, glass powder, and acrylic shavings attached to each object independently were prepared.

The above-mentioned object was cleaned using three types of cleaning brushes, and the presence or absence of scratches on the surface of the object was visually confirmed. The results are shown in Table 1. In the "Damage of object" column of Table 1,
A: No scratches B: It means that scratches can be confirmed.

From the results in Table 1, it can be seen that when a cleaning brush having the brush bristles shown in Material 3 is used, scratches are observed on the surface of the object. From this, it can be seen that when the fineness of the brush bristles is high and the rigidity index is high, the surface of the object is easily damaged.

Next, with respect to Material 1 and Material 2 in which no scratches were observed, the recoverability of foreign matter and the removability of burrs were confirmed. The results are shown in Table 1.

The recoverability of foreign matter was calculated by dividing the total number of foreign matter removed after the cleaning treatment by the total number of attached foreign matter. In addition, the removability of burrs can be visually confirmed.
A: The removed burrs are 50% or more. B: The removed burrs are less than 50%.

From the results in Table 1, it can be seen that the material 1 is excellent in the recoverability of foreign substances and the removal of burrs. On the other hand, the material 2 has a low rigidity index, so that the burr removal property is low. From this, it can be said that by setting the rigidity index of the brush bristles to 20 or more and 100 or less, burrs can be effectively removed while suppressing scratches on the surface of the object.

1, 2 Cleaning device 10 1st cleaning unit 11 1st cleaning brush

11a Core metal

11b Brush part 12 2nd cleaning brush

12a Core metal

12b Brush part 13 1st roller 14 2nd roller 15 Dust collection roller 15a 1st dust collection roller 15b 2nd dust collecting roller 16 scraper 16a 1st scraper 16b 2nd scraper 17 foreign matter guiding plate 17a 1st foreign matter guiding plate 17b 2nd foreign matter guiding plate 18 foreign matter discharging part 19 frame 19a foreign matter collecting part 20 2nd cleaning unit 21 3rd Cleaning brush 22 4th cleaning brush 23 3rd roller 24 4th roller 41 1st cleaning brush 42 2nd cleaning brush 43 1st roller 44 2nd roller 45 Cleaning roller

45a Core metal

45b Inner layer

45c Outer layer 46 3rd roller 47 Brush roller

47a Core metal

47b Brush part 48 2nd dust collecting roller 49 2nd scraper S Object S1 Burr S1a Reverse whiskers S1b Forward whiskers

Claims

A cleaning device that cleans at least one surface of a sheet-shaped object to be transported.
A pair of cleaning brushes that come into contact with one of the above surfaces and are driven to rotate,
The other surface of the object is provided with a pair of rollers that are in contact with the pair of cleaning brushes facing each other.
The pair of cleaning brushes have a columnar core metal and a brush portion formed of a plurality of bristles and provided on the peripheral surface of the core metal, and the brush portion is at least both side edges of the one surface. It is rotationally driven so that it comes into contact with the part.
Of the pair of cleaning brushes, the direction of rotation at the contact portion of one cleaning brush with the one surface is forward with respect to the transport direction of the object, and the other cleaning brush has the same direction as the one surface. A cleaning device in which the rotation direction at the contact portion of the object is opposite to the transport direction of the object.
The peripheral speed of one of the cleaning brushes is higher than the transport speed of the object.
The cleaning device according to claim 1, wherein the speed difference is 1 m / min or more and 30 m / min or less.
The cleaning device according to claim 1 or 2, wherein the amount of the pair of cleaning brushes pushed into one surface is 0.5 mm or more and 3 mm or less.
The cleaning device according to claim 1, claim 2 or claim 3, wherein the pair of cleaning brushes are rotationally driven and the contact portion vibrates in the direction of the rotation axis.
A cleaning roller that comes into contact with one of the above surfaces while the surface is charged is provided.
The direction of rotation of the cleaning roller at the contact portion with one of the surfaces is forward with respect to the transport direction of the object.
The one cleaning brush, the other cleaning brush, and the cleaning roller are arranged in this order from the upstream side in the transport direction.
The cleaning device according to any one of claims 1 to 4, wherein the other cleaning brush comes into contact with the other cleaning brush in the width direction of the one surface.