JP3964886B2 - Panel cleaning apparatus and method - Google Patents

Description

  The present invention relates to an apparatus and method for cleaning a panel that requires high cleanliness on the surface, such as a liquid crystal panel of a liquid crystal display device.

  A liquid crystal panel is one in which liquid crystal is sealed between two glass substrates on which color filters and transparent electrodes are installed, and there is no foreign matter generated during manufacturing, such as the resin residue used when sealing the liquid crystal. Since it is a main cause of generating non-defective products, cleaning is performed to remove foreign substances adhering to the surface of the liquid crystal panel.

  Cleaning of such a panel is performed using a cleaning head. The cleaning head has a contact roller arranged at the lower end of the head, and a cleaning tape and a cleaning belt housed in the head are pressed against the surface of the panel through the contact roller.

  The panel uses a frame material having substantially the same thickness as that of the panel, and is vacuum-adsorbed on the back surface of the panel, and is fixed at a certain position (for example, see Patent Documents 1 and 2). The panel is cleaned by pressing a cleaning tape or cleaning belt against the panel surface through the contact roller while rotating the cleaning head about an axis that passes through the center of the contact roller and is perpendicular to the panel surface. Is done by.

In addition, two cleaning heads are arranged one above the other, and the upper contact roller is moved back and forth in a direction perpendicular to the panel transport direction while sandwiching the transported panel with the contact rollers of these cleaning heads. Cleaning is performed at the same time (see, for example, Patent Document 3).
Japanese Patent Laid-Open No. 11-19859 JP 2001-198753 A JP 2001-62696 A

  However, since the back surface of the panel is vacuum-sucked in order to fix the panel in a fixed position during cleaning, there is a problem that suction marks are formed on the back surface of the panel and this suction mark cannot be easily erased. is there.

  In addition, when cleaning both surfaces simultaneously with the contact rollers of the two cleaning heads arranged on the upper and lower sides while sandwiching the transported panel, the panel is transported while being maintained at a constant height. Although it is necessary to keep the height of the two contact rollers constant, it is difficult to align the heights of these two contact rollers and maintain them at a constant height with high accuracy. There is a problem that the panel may bend or break.

  Accordingly, an object of the present invention is to provide a panel cleaning apparatus and method capable of cleaning while transporting a panel without forming suction marks.

  Another object of the present invention is to provide a panel cleaning apparatus and method capable of cleaning both surfaces of a panel while transporting the panel without forming suction marks.

  The panel cleaning apparatus of the present invention that achieves the above object has a cleaning section that includes a cleaning unit for cleaning one of the front and back surfaces of the panel while transporting the panel.

  The cleaning unit includes a transport unit that transports the panel and a cleaning unit that cleans one surface of the panel.

  The conveying means includes panel holding means for holding the panel during cleaning and a belt conveyor for conveying the panel during cleaning.

  The panel holding means is arranged on the side where the panel is input to the cleaning section, and is a nip roller on the input side composed of at least a pair of rollers which hold the panel sandwiched from the front side and the back side, and the side which outputs the panel from the cleaning section And an output side nip roller that is arranged in parallel with the input side nip roller and includes at least a pair of rollers that sandwich and hold the panel from the front side and the back side.

  The distance between the nip roller on the input side and the nip roller on the output side is a distance shorter than the length of the panel, so that during cleaning, the panel is moved by at least one of the nip rollers on the input side and the output side. Retained.

  The belt conveyor is arranged between the nip roller on the input side and the nip roller on the output side. The belt conveyor has an input side roller arranged in parallel with the input side nip roller on the input side of the panel to the cleaning section, and an output side array arranged in parallel with the input side roller on the output side of the panel from the cleaning section. It comprises a roller, a belt wound around these input side and output side rollers, and means for driving the belt. In addition, the belt conveyor may be further configured from a tension roller that tensions the belt wound around the input side and output side rollers.

  The belt supports the panel from the other side opposite to the one side of the panel. Then, the input side and output side rollers of the belt conveyor and the input side and output side nip rollers of the panel holding means are arranged so that the panel supported by the belt is conveyed straight.

  In one aspect of the present invention, the cleaning means includes a contact roller for pressing the cleaning tape or the cleaning belt against one surface of the panel, and a means for running the cleaning tape or the cleaning belt through the contact roller. The cleaning roller has a length longer than the width of the panel, and the cleaning tape or the cleaning belt is wider than the width of the panel. In this aspect, the cleaning means further comprises means for reciprocating the cleaning head along the direction of the axis perpendicular to one surface of the panel, and means for reciprocating the cleaning head along the width direction of the panel. Is done.

  In another aspect of the present invention, a cleaning head comprising a contact roller for pressing the cleaning tape or the cleaning belt against one surface of the panel, and means for running the cleaning tape or the cleaning belt via the contact roller. The contact roller has a length shorter than the distance between the nip roller on the input side and the nip roller on the output side. In this aspect, the cleaning means includes means for reciprocating the cleaning head along an axis direction perpendicular to one surface of the panel, means for reciprocating the cleaning head along the width direction of the panel, and contact roller. Further comprising means for rotating the cleaning head about an axis passing through the center of the panel and perpendicular to one side of the panel.

  In another aspect of the present invention, the cleaning means attaches a cleaning pad to the surface, presses the cleaning pad against one surface of the panel, and passes through the center of the contact disk and is perpendicular to the one surface of the panel. Having a cleaning head composed of means for rotating the contact disk about an axis, the diameter of the contact disk being shorter than the distance between the nip roller on the input side and the nip roller on the output side. In this aspect, the cleaning means further comprises means for reciprocating the cleaning head along the direction of the axis perpendicular to one surface of the panel, and means for reciprocating the cleaning head along the width direction of the panel. Is done.

  The panel cleaning method of the present invention uses the panel cleaning device of the present invention to clean one of the front and back surfaces of the panel while transporting the panel.

  The panel is transported by driving the belt, then holding the panel with the nip roller on the input side of the panel holding means, and transporting the panel while supporting the panel from the other surface of the panel with the belt. Then, this panel is held by the nip roller on the output side of the panel holding means, and the panel is further conveyed.

  In one aspect of the present invention described above (using a contact roller having a length longer than the width of the panel and a cleaning tape or cleaning belt having a width wider than the width of the panel), the panel is as described above. When being transported, the cleaning head is moved along the direction of the axis perpendicular to one side of the panel, and the cleaning tape or the cleaning belt is pressed against the one side of the panel via the contact roller, and the width of the panel One surface of the panel is cleaned by reciprocating the cleaning head along the direction.

  In another aspect of the present invention described above (using a contact roller having a length shorter than the distance between the input side nip roller and the output side nip roller and a cleaning tape or a cleaning belt), the panel is The cleaning head along the direction of the axis perpendicular to one side of the panel while rotating the cleaning head about an axis that passes through the center of the contact roller and perpendicular to one side of the panel. The cleaning tape or the cleaning belt is pressed against one surface of the panel via a contact roller, and the cleaning head is reciprocated along the width direction of the panel to clean one surface of the panel.

  In the other aspect of the present invention described above (using a contact disk having a diameter shorter than the distance between the input side nip roller and the output side nip roller and the cleaning pad), the panel is as described above. While rotating the contact disk, move the cleaning disk along with the cleaning head along the direction of the axis perpendicular to one side of the panel while rotating the contact disk. One surface of the panel is cleaned by pressing the cleaning pad affixed to, and reciprocating the cleaning disk along with the cleaning head along the width direction of the panel.

  During cleaning, the panel is transported by a belt conveyor without being vacuum-sucked, so that the panel can be cleaned while transporting the panel without forming suction marks on the panel. Further, since the panel is supported by the belt (that is, the other surface opposite to the one surface of the panel is supported by the surface of the belt), the panel may be bent or destroyed during cleaning. Absent.

  Using two cleaning units, one cleaning unit is arranged to clean one side of the panel, the other cleaning unit is arranged to clean the other side of the panel, and the panel is cleaned one by one By doing so, both sides of the panel can be cleaned while transporting the panel without forming suction marks.

  1 to 5 show a panel cleaning apparatus according to the present invention. The illustrated panel cleaning apparatus 10 has a cleaning section 11 having a cleaning unit 50 for cleaning the surface of the panel 12, inputs the panel 12 to the cleaning section 11, and transports the panel 12 in the direction of arrow X. The surface of the panel 12 is cleaned while the panel 12 is output from the cleaning section 11.

  In the illustrated example, the surface of the panel 12 is typically cleaned, but the cleaning unit 50 may be arranged so as to clean the back surface of the panel 12 like a cleaning unit 50 ′ shown in FIG. 6. Further, the panel 12 may be transported with the surface thereof facing upward or downward in the horizontal direction, or may be transported in the vertical direction (the panel 12 is transported in an upright state).

  The cleaning unit 50 includes a transport unit that transports the panel 12 in the direction indicated by the arrow X, and a cleaning unit that cleans the surface of the panel 12.

  The conveying means includes a panel holding means 40 that holds the panel 12 during cleaning, and a belt conveyor 30 that conveys the panel 12 during cleaning.

  The panel holding means 40 is arranged on the side where the panel 12 is input to the cleaning section 11 and has an input side nip roller 41 composed of a pair of rollers 41a and 41b which hold the panel 12 sandwiched from the front side and the back side, and the cleaning section From the section 11 to the output side of the panel 12, from the output side nip roller 42, which is arranged in parallel to the input side nip roller 41 and holds the panel 12 sandwiched from the front side and the back side. Composed. The nip rollers 41 and 42 are each constituted by a pair of rollers (41a, 41b, 42a, 42b) in the illustrated example, but may be constituted by two or more pairs of rollers.

  The distance between the input-side nip roller 41 and the output-side nip roller 42 is a distance shorter than the length of the panel 12, so that during cleaning, the panel is at least one of the input-side and output-side nip rollers. Is held by a nip roller. This also prevents the panel 12 from falling even if the panel 12 is transported and cleaned in an upright state.

  As shown in the figure, the belt conveyor 30 is arranged between an input side nip roller 41 and an output side nip roller 42.

  The panel 12 is input to the cleaning section 11 by known means in which a plurality of rollers driven by a motor or the like are arranged (see, for example, Patent Document 2 above), and the panel 12 is held by the nip roller 41.

  The belt conveyor 30 has an input side roller 32 arranged in parallel with the input side nip roller 41 on the input side of the panel 12 to the cleaning section 11, and an input side roller 32 on the output side of the panel 12 from the cleaning section 11. Output side rollers 33 arranged in parallel with each other, a belt 31 wound around these rollers 32 and 33, and belt driving means (not shown) for driving the belt 31 in the direction of arrow T. The tension of the belt 31 and the attachment / detachment to / from the rollers 32 and 33 can move at least one of the input side and output side rollers 32 and 33 in the direction of the arrow X (or the direction opposite to this direction). This can be done by moving this roller.

  The belt conveyor 30 further includes a tension roller 34 that tensions the belt 31. The tension roller 34 can be moved in the direction indicated by the arrow S. By moving the tension roller 34 in the direction of the arrow S, the tension of the belt 31 wound around the rollers 32 and 33 can be adjusted. This also allows the belt 31 to be attached and detached.

  Preferably, a motor (not shown) is connected to the output-side roller 33, and by driving this motor, the roller 33 rotates and the belt 31 is driven in the direction of arrow T.

  The belt 31 conveys the panel 12 in the direction indicated by the arrow X while supporting the panel 12 from the back surface of the panel 12.

  The nip roller 41 on the input side is arranged so that the panel 12 can be input straight on the belt 31 in the direction of arrow X while holding the panel 12, and the nip roller 42 on the output side is moved in the direction of arrow X by the belt 31. While holding the panel 12 being conveyed, the panel 12 is arranged so that it can be output straight from the belt 31 in the direction of arrow X.

  The belt 31 is made of rubber. The surface of the belt 31 that supports the panel 12 may be flat. However, as shown in FIG. 1B, the belt 31 has a width of the panel or a width slightly larger than the width and a thickness of the panel in the longitudinal direction. Alternatively, the groove 31a slightly shallower than this thickness may be formed so that the panel 12 is not easily displaced on the belt 31 during cleaning. By supporting the panel 12 in such a groove 31a, the panel 12 is not easily dropped during cleaning even when the panel 12 is vertically conveyed and the conveyance path of the panel 12 is kept constant. Can be maintained.

  The cleaning means is for cleaning the surface of the panel 12 being conveyed in the direction indicated by the arrow X by the conveying means 30 and 40 described above.

  As shown in FIG. 1A, the cleaning unit has a cleaning head 20 including a contact roller 21 that presses the cleaning tape 22 against the surface of the panel 12 and a unit that causes the cleaning tape 22 to travel through the contact roller 21.

  As shown in the figure, the cleaning head 20 accommodates a tape roller 25 around which an unused cleaning tape 22 is wound in a cartridge type in a housing, and the cleaning tape 22 is fed out from the tape roller 25 to be contact rollers. It is wound around the winding roller 26 via 21. The feeding and winding of the cleaning tape 22 are performed by a motor (not shown) connected to the tape roller 25 and the winding roller 26, whereby the cleaning tape 22 travels via the contact roller 21. In the illustrated cleaning head 20, cleaning can be performed by always pressing an unused cleaning tape against the surface of the panel 12. As the cleaning tape 22, a tape made of a synthetic fiber woven or non-woven fabric or foam is used.

  Alternatively, instead of the cleaning head 20 using the cleaning tape 22, as shown in FIG. 2A, a cleaning head 20 using a cleaning belt 23 driven by means such as a motor during cleaning may be used. . In this case, the cleaning head 20 can be further reduced in size and weight. As the cleaning belt 23, a belt made of a synthetic fiber woven or non-woven fabric or foam (for example, see JP-A-2004-98218) is used.

  Further, instead of the cleaning head 20 using the cleaning tape 22 or the cleaning belt 23, a cleaning pad 28 is attached to the surface, and a contact disk 27 for pressing the cleaning pad 28 against the surface of the panel 12 A cleaning head 20 comprising a motor 29 for rotating the contact disk 27 in the direction of arrow r with respect to an axis (rotation axis) indicated by reference numeral 24 passing through the center and perpendicular to the surface of the panel may be used. In this case, the cleaning head 20 can be further reduced in size and weight.

  One embodiment of the present invention is shown in FIG. In the illustrated embodiment, the surface of the panel 12 is cleaned using the cleaning head 20 shown in FIG. 1A or 2A, and the length of the contact roller 21 is longer than the width of the panel 12. The cleaning tape 22 or the cleaning belt 23 is wider than the width of the panel 12.

  In this embodiment, the cleaning head 20 is pushed in the width direction of the panel 12 (arrow Y) while pressing the cleaning tape 22 or the cleaning belt 23 through the contact roller 21 against the surface of the panel 12 conveyed in the direction of arrow X by the belt 31. The surface of the panel 12 is cleaned.

  The reciprocating movement in the Y direction is performed by, for example, placing a holding table (not shown) with the cleaning head 20 slidably on a guide rail extending in the width direction of the panel 12 (in the direction of arrow Y), This can be done by known means (not shown) such as reciprocating movement by a crankshaft mechanism (see, for example, Patent Document 3).

  Further, the cleaning tape 22 or the cleaning belt 23 is pressed against the surface of the panel 12 by reciprocating the cleaning head 20 in the direction of arrow Z (direction perpendicular to the surface of the panel 12). For this reciprocating movement, a known means (not shown) is used for reciprocating the cleaning head 20 in the direction of the arrow Z integrally with the Y direction reciprocating means using a combination of a servo motor and a ball screw. ) (See, for example, Patent Document 1).

  Another embodiment of the present invention is shown in FIG. In the illustrated embodiment, the surface of the panel 12 is cleaned using the cleaning head 20 shown in FIG. 1A or 2A, and the contact roller 21 is interposed between the nip rollers 41 and 42. The length is shorter than the interval.

  In this embodiment, the cleaning tape 22 or the cleaning belt 23 is pressed against the surface of the panel 12 conveyed in the direction of the arrow X by the belt 31 via the contact roller 21, and the center of the contact roller 21 is interposed between the nip rollers 41 and 42. The cleaning head 20 is rotated in the width direction of the panel 12 (the direction of the arrow Y) while the cleaning head 20 is rotated in the direction of the arrow R with respect to an axis (rotation axis) indicated by a reference numeral 24 that passes through Accordingly, the surface of the panel 12 is cleaned.

  The cleaning head 20 is rotated by, for example, a known means (not shown) in which the cleaning head 20 is rotatably attached to a holding base to which a motor is attached, and the cleaning head 20 is connected to the motor using a belt or the like. (For example, see Patent Document 1).

  The rotation shaft 24 of the cleaning head 20 is located at the center between the rollers 32 and 33, and the cleaning head 20 is positioned between the rollers 32 and 33 in the width direction of the panel 12 (the direction indicated by the arrow Y in FIG. 2). Can be moved back and forth.

  The reciprocating movement in the Y direction is similar to the reciprocating movement in the Y direction. For example, the holding table (the cleaning head 20 is rotatable) on the guide rail extending in the width direction of the panel 12 (the direction of the arrow Y). (Which is attached) can be slidably mounted, and the holding table can be moved by known means (not shown) such as a reciprocating movement using a crankshaft mechanism, a servo motor and a screw (for example, Patent Document 3). And the “one-way moving means” described in paragraphs 0030 and 0031 of JP-A No. 2003-117796).

  The cleaning tape 22 or the cleaning belt 23 is pressed against the surface of the panel 12 by reciprocating the cleaning head 20 in the direction of arrow Z (direction perpendicular to the surface of the panel 12). This reciprocating movement is a known means for reciprocating the cleaning head 20 in the direction of the arrow Z integrally with the head rotating means or the Y direction reciprocating means using a combination of a servo motor and a ball screw. (For example, refer to Patent Document 1).

  FIG. 5 shows another embodiment of the present invention. In the illustrated embodiment, the surface of the panel 12 is cleaned using the cleaning head 20 shown in FIG. 2B, and the diameter of the contact disk 27 is the distance between the nip roller 41 on the input side and the nip roller 42 on the output side. Is in a shorter length.

  In this embodiment, the cleaning pad 28 is pressed via the contact disk 27 against the surface of the panel 12 being conveyed in the direction of the arrow X by the belt 31, and the arrow passing through the center of the contact disk 27 and perpendicular to the surface of the panel 12. While rotating the contact disk 27 in the direction of arrow R with respect to the axis (rotation axis) indicated by 24, the cleaning disk 27 is reciprocated along with the cleaning head 20 in the direction of arrow Y along the width direction of the panel 12. Thus, the surface of the panel 12 is cleaned.

  The cleaning disk 27 is connected to a motor 29 of the cleaning head 20, and rotates in the direction of arrow R when the motor 29 is driven.

  The rotating shaft 24 of the cleaning disk 27 is located at the center between the rollers 32 and 33, and the cleaning disk 27 is integrated with the cleaning head 20, and between these rollers 32 and 33, the width direction of the panel 12 ( It can reciprocate in the direction indicated by arrow Y in FIG.

  The reciprocating movement in the Y direction is similar to the reciprocating movement in the Y direction described above, for example, by sliding the holding table on which the cleaning head 20 is mounted on the guide rail extending in the width direction of the panel 12 (the direction of the arrow Y). It can be mounted by known means (not shown) such that the holding base can be reciprocated by using a crankshaft mechanism, a servo motor and a screw.

  The cleaning pad 28 is pressed against the surface of the panel 12 via the contact disk 27 by reciprocating the cleaning head 20 in the direction of arrow Z (direction perpendicular to the surface of the panel 12). For this reciprocating movement, a known means (not shown) is used for reciprocating the cleaning head 20 in the direction of the arrow Z integrally with the Y direction reciprocating means using a combination of a servo motor and a ball screw. ).

  As the cleaning pad 28, a pad made of synthetic fiber woven or non-woven fabric or foam is used.

  FIG. 6 shows a panel cleaning apparatus 10 for cleaning both sides of the panel according to the present invention. The illustrated panel cleaning apparatus 10 includes a cleaning section 11 that cleans the surface of the panel, and a cleaning section 11 ′ that cleans the back surface of the panel.

  The cleaning unit 50 ′ provided in the cleaning section 11 ′ has substantially the same configuration as the cleaning unit 50 provided in the cleaning section 11. That is, the cleaning head 20 ′, the belt conveyor 30 ′, and the panel holding unit 40 ′ that constitute the cleaning unit 50 ′ are substantially the same as the cleaning head 20, the belt conveyor 30, and the panel holding unit 40 that constitute the cleaning unit 50, respectively. In the same configuration, the cleaning section 11 ′ merely arranges these components 20, 30 and 40 so as to be symmetrical with respect to the straight conveyance path of the panel 12.

  In the illustrated example, the panel 12 is transported in the direction of the arrow X by the cleaning section 11, the surface is cleaned, and further transported, and the panel 12 whose surface has been cleaned is output from the cleaning section 11. Following this, it is input to the cleaning section 11 ′. In the cleaning section 11 ′, the back surface is cleaned while the panel is transported in the direction of the arrow X by the cleaning unit 50 ′. Output from. (Here, the panel indicated by reference numeral 12 'conveyed in the direction of arrow X by the cleaning section 11' has its surface already cleaned by the cleaning section 11, and its back surface cleaned by the cleaning section 11 '. Thereby, both surfaces of the panel 12 are cleaned.

  In this way, two cleaning units 50 and 50 ′ are used, one cleaning unit 50 is arranged so as to clean the surface of the panel 12, and the other cleaning unit 50 ′ is cleaned so as to clean the back surface of the panel 12. By arranging and cleaning the panel 12 one side at a time, both sides of the panel 12 are cleaned while the panel 12 is conveyed.

  In the example shown in FIG. 6, the cleaning heads 20 and 20 ′ shown in FIGS. 1A and 2A are shown, but instead of this cleaning head, the cleaning head 20 shown in FIG. 2B can be used. Also, the cleaning heads shown in FIGS. 1A, 1A, and 2B may be arranged in combination.

FIG. 1A is a side view of a panel cleaning device according to the present invention, and FIG. 1B shows an example of a cross section of a belt. 2A and 2B show a modification of the cleaning head. FIG. 3 is a plan view of a panel cleaning apparatus according to one embodiment of the present invention. FIG. 4 is a plan view of a panel cleaning device according to another aspect of the present invention. FIG. 5 is a plan view of a panel cleaning device according to another aspect of the present invention. FIG. 6 shows an example of a panel cleaning device for cleaning both sides of the panel according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Panel cleaning apparatus 11, 11 '... Cleaning section 12, 12' ... Panel 20, 20 '... Cleaning head 21 ... Contact roller 22 ... Cleaning tape 23 ... Cleaning Belt 24 ... Rotating shaft 25 ... Tape roller 26 ... Winding roller 27 ... Contact disk 28 ... Cleaning pad 29 ... Motor 30, 30 '... Belt conveyor 31 ... Belt 32... Input side roller 33... Output side roller 34... Tension roller 40, 40 ′ Panel holding means 41, 42... Nip rollers 41 a, 41 b, 42 a, 42 b. Roller 50, 50 '... Cleaning unit R ... Head rotation direction r ... Contact disk rotation direction S Tension roller moving direction T · · · belt direction of the driving direction X · · · panel transportation direction Y · · · an axis perpendicular to the surface direction Z · · · panel width of the panel

Claims (5)

A panel cleaning device having a cleaning section having a cleaning unit for cleaning either one of the front and back surfaces of the panel while transporting the panel,
The cleaning unit is
A conveying means for conveying the panel; and a cleaning means for cleaning one surface of the panel;
Consisting of
The conveying means is
(1) Panel holding means for holding the panel during cleaning,
A nip roller on the input side, which is arranged on the input side of the panel to the cleaning section, and which holds the panel sandwiched from the front side and the back side thereof, and on the output side of the panel from the cleaning section, An nip roller on the output side, which is arranged in parallel with the nip roller on the input side and comprises at least a pair of rollers that hold the panel sandwiched from the front side and the back side thereof
Consisting of
The distance between the input side nip roller and the output side nip roller is shorter than the length of the panel, and during cleaning, the panel is at least one of the input side and output side nip rollers. Held by nip rollers,
Panel holding means, and (2) a belt conveyor arranged between the input-side nip roller and the output-side nip roller, for conveying the panel during cleaning,
An input side roller arranged in parallel with the input side nip roller on the side of inputting the panel to the cleaning section;
On the output side of the panel from the cleaning section, an output side roller arranged in parallel with the input side roller,
A belt wound around the input side roller and the output side roller, and means for driving the belt;
Consisting of
The input side and the output side of the belt conveyor so that the belt supports the panel from the other side opposite to one side of the panel, and the panel supported by the belt is conveyed straight. And the nip rollers on the input side and output side of the panel holding means are arranged,
The belt conveyor,
Consisting of,
Panel cleaning device.   2. The panel cleaning device according to claim 1, wherein the belt conveyor further comprises a tension roller for tensioning the belt wound around the input side roller and the output side roller. The cleaning means
(1) A cleaning head comprising a contact roller for pressing a cleaning tape or a cleaning belt against one surface of the panel, and a means for running the cleaning tape or the cleaning belt through the contact roller,
The contact roller is longer than the width of the panel, and the cleaning tape or cleaning belt is wider than the width of the panel.
The cleaning head,
(2) means for reciprocating the cleaning head along an axis direction perpendicular to one surface of the panel; and (3) means for reciprocating the cleaning head along the width direction of the panel;
Consisting of,
However, the panel cleaning apparatus according to claim 1. The cleaning means
(1) A contact pad for attaching a cleaning pad to the surface and pressing the cleaning pad against one surface of the panel, and the contact disk with respect to an axis passing through the center of the contact disk and perpendicular to the one surface of the panel A cleaning head comprising means for rotating
The diameter of the contact disk is shorter than the distance between the input side nip roller and the output side nip roller,
The cleaning head,
(2) means for reciprocating the cleaning head along an axis direction perpendicular to one surface of the panel; and (3) means for reciprocating the cleaning head along the width direction of the panel;
Consisting of,
However, the panel cleaning apparatus according to claim 1. A panel cleaning method using the panel cleaning device according to claim 1,
A transporting process for transporting the panel; and a cleaning process for cleaning one of the front surface and the back surface of the panel;
Consisting of
The conveying step is
Driving the belt;
Holding the panel with a nip roller on the input side of the panel holding means;
A step of conveying the panel while supporting the panel from the other surface of the panel by the belt; and a step of holding the panel by a nip roller on the output side of the panel holding means;
Consisting of,
But panel cleaning method.

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