JPH0593583U - Plate-shaped cleaning device - Google Patents

Abstract

(57) [Abstract] [Purpose] The cleaning cloth can be smoothly taken up, and the cleaning cloth can be prevented from being damaged by the edge of the cleaning plate-like object, and the plate-like object can be conveyed through the conveying means. A device for cleaning plate-like objects that does not cause redeposition of dust on the surface. A plate shape in which a rotatable pressing roller 30 conveys a cleaning cloth 2 from a cloth holding portion 21 that rotatably holds a cleaning cloth wound in a roll shape to a cloth winding portion 22 by a conveyor 10 It is provided so as to be movable between a cleaning operation position where the object 1 is pressed and a cleaning operation is performed, and a retracting position where the object 1 is retracted from the cleaning operation position.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cleaning device for a plate-like object that cleanly wipes the surface of a contact plate used when press-molding a printed circuit board or the surface of a printed circuit board after molding.

[0002]

[Prior Art]

 A printed circuit board is formed by impregnating a fibrous layer with a thermosetting resin by hot pressing with a smooth pressing plate interposed between the printed board and a hot plate. .. The plate used in this hot press is used after polishing and cleaning to remove the adhered resin after use, but in this reuse, the adhered dust is wiped off. It is necessary to clean the surface. Also, it is necessary to wipe off dust adhering to the surface of the printed circuit board after molding.

Conventionally, the step of wiping off the surface of such a plate-like object (a plate or a printed circuit board after molding) has been performed by hand only, and the work efficiency was extremely poor. Therefore, the applicant of the present invention can take up the cleaning cloth from the holding means for holding the cleaning cloth wound in a roll shape by the winding means as an automatic operation for wiping the surface of such a plate-like object. In addition, a cleaning device for cleaning the surface of the plate-like object by pressing the cleaning cloth between the holding means and the take-up means with the surface of the plate-like object conveyed by the plate-like object conveying means by the cross pressing means. Proposed. (JP-A-4-7068)

[0004]

[Problems of the prior art]

 However, with the above-described conventional structure, the cleaning cloth cannot be smoothly wound up, the cleaning cloth is damaged by the edge of the cleaning plate-like object, and dust once wiped off adheres to the conveying means. There was a problem such as reattachment to the plate.

[0005]

[The purpose of the device]

 In view of the above circumstances, the present invention can smoothly wind up the cleaning cloth, prevent damage to the cleaning cloth due to the edge of the cleaning plate-like object, and also, through the conveying means. An object of the present invention is to provide a cleaning device for a plate-like object that does not cause reattachment of dust to the plate-like object.

[0006]

[Means for solving the problem]

 In order to achieve the above object, a cleaning device for a plate-like object according to the present invention is a cleaning device that rotatably holds a cleaning cloth wound in a roll before and after a conveying means for conveying a plate-like object in the plate-object conveying direction. The cloth holding means and the cleaning cloth winding means for winding the cleaning cloth are arranged, and the plate is conveyed by the conveying means by bending the path of the cleaning cloth from the cleaning cloth holding means to the cleaning cloth winding means. In the one provided with the cleaning cloth pressure contact means for contacting the surface of the object, the cloth contact means is formed by a rotatable roller member, and the cleaning cloth is applied to the surface of the plate object conveyed by the conveyor means. Moved to the cleaning action position where the contact is urged and the retracted position where it is separated from the surface of the plate-like object. Is a capability, is configured to include a driving means for moving driving the cross pressing device.

[0007] Further, a detection means capable of detecting the plate-like object conveyed by the conveying means is provided, and after the detection of the passage of the front end of the conveyed plate-like object at a position corresponding to the cross pressure welding means. The cross pressure contact means is configured to be moved and driven from the retracted position to the cleaning operation position by the drive means. Further, the plate-shaped material conveying means facing the cross pressure contact means is provided with a negative pressure suction table facing the cross pressure contact means, and the conveyance belt having air permeability that does not hinder the suction action of the negative pressure suction table. It is constructed so as to be movable along the surface. Further, the conveyor belt is provided so as to be in contact with the cleaning cloth at a portion that does not contribute to the conveyance of the plate-like object.

[0008]

[Example of device]

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram corresponding to a side view of an embodiment of a plate-like object cleaning device according to the present invention. In the illustrated cleaning device, a transport path for transporting the cleaning plate is formed by the transport conveyor 10 from the left side to the right side in the figure, and the upper surface cleaning unit 20 and the lower surface cleaning unit 40 are arranged along the transport direction. Are juxtaposed.

The transfer conveyor 10 is composed of an introduction conveyor 11, an upper surface cleaning section conveyor 12, a lower surface cleaning section conveyor 13, and a carry-out conveyor 14, which are arranged in series with their transfer planes on the same plane. .. The introduction conveyor 11 and the carry-out conveyor 14 are so-called conveyor belts, which are not shown in the overall image, but in which endless belts 11A and 14A having a predetermined width are arranged so as to be capable of revolving with their upper orbits matching the conveying plane. The plate-like object is supported by the upper surface of the orbiting track on the upper side by being orbitally driven by a drive source, and is conveyed from the left side to the right side in the figure.

Similar to the introduction conveyor 11 and the carry-out conveyor 14, the upper surface cleaning section conveyor 12 spans the endless belt 12B having a predetermined width between the conveyor rollers 12F and 12R which are arranged at a predetermined distance before and after the plate-shaped material is conveyed. The upper orbit is arranged so that it can be orbited in line with the transport plane. Although not shown, the endless belt 12B has a plurality of ventilation holes formed therein. Further, a table 12T is provided in the orbit along the inner surface of the orbit above the endless belt 12B. Although not shown, the table 12T has an air passage therein, and a large number of small holes communicate with the upper surface of the air passage, and the air passage is connected to a vacuum pump 12P provided outside. The vacuum pump 12P is connected and sucked by the vacuum pump 12P to be a negative pressure. As a result, the plate-shaped object placed on the upper surface of the orbital track on the upper side of the endless belt 12B is suction-adhered to the endless belt 12B by a negative pressure through the small holes and the ventilation holes of the endless belt 12B. The endless belt 12B is circulated so as to be stably conveyed.

The lower surface cleaning unit conveyor 13 is the upper surface cleaning unit conveyor 12 arranged upside down as it is, and is configured to convey a lower orbit of the endless belt 13B wound between the conveyor rollers 13F and 13R to a conveying plane. In addition, the table 13T is provided so that the lower surface thereof also follows the inner surface of the lower orbit of the endless belt 13B, and the suction hole by the vacuum pump 13P acts on this endless belt 13B. It is arranged on the lower surface side. Here, the conveyor roller 13F on the upstream side in the transport direction is located on the downstream end of the table 13T of the upper surface cleaning section conveyor 12, and the conveyor roller 13R on the downstream side in the transport direction is located on the upstream side of the unloading conveyor 14. The lower surface cleaning section conveyor 13 is arranged such that the transport operation areas at both front and rear ends thereof are overlapped with the upper surface cleaning section conveyor 12 or the unloading conveyor 14, respectively. Further, the end of the table 12T of the upper surface cleaning section conveyor 12 on the downstream side in the plate-shaped object transport direction and the end of the table 13T of the lower surface cleaning section conveyor 13 on the upstream side in the plate-shaped object transfer direction are in the plate-shaped object transfer direction. Almost all of them are aligned (slightly polymerized).

The upper surface cleaning unit 20 includes a cloth holding unit 21 as a cleaning cloth holding unit above the end of the table 12 T of the upper surface cleaning unit conveyor 12 on the downstream side in the plate-shaped object conveying direction. A cross winding section 22 as a cleaning cross winding means is arranged on the upper side of the upstream side end in the direction, and between the cross holding section 21 and the cross winding section 22 (that is, the upper surface cleaning section conveyor 12). On the upper side corresponding to the table 12T), pressure contact rollers 30 ... As cross pressure contact means are arranged at three predetermined intervals at the upper surface cleaning section conveyor 12 (first pressure contact roller in order along the plate-shaped object conveying direction). 30A, the second pressure contact roller 30B and the third pressure contact roller 30C), and further the first pressure contact roller 30A and the second pressure contact roller 30. B and the upper side between the second pressure contact roller 30B and the third pressure contact roller 30C, and the downstream side of the third pressure contact roller 30C, which is the most downstream side in the plate-like material conveying direction, respectively, the idle roller 28. (The first idle roller 28A, the second idle roller 28B, and the third idle roller 28C are provided in this order along the plate-like object conveying direction.

The first pressing roller 30A, which is the most upstream side in the plate-like object conveying direction (plate-like object introducing side), is located below the cross winding section 22, and is the third most downstream side in the plate-like object conveying direction. The idle roller 28C is located below the cloth holding unit 21 and above the conveyor roller 13F, which is upstream of the lower surface cleaning unit conveyor 13 in the transport direction, and downstream of the conveyor roller 13F in the transport direction. The upper surface cleaning unit 20 is configured to have a width corresponding to the width of the cleaning plate-like object (length in the direction orthogonal to the transport direction of the plate-like object), and its constituent elements (the cross-holding unit 21, the cloth holder). The take-up portion 22, the pressure contact roller 30 ..., and the idle roller 28 ...) are supported in a cantilever state on a column (not shown) provided upright on one end side, and the other end side is open. is there.

In the cloth holding portion 21, a holding shaft 21A which is inserted into a central hole of a roll-shaped cloth in which the cleaning cloth 2 is wound is rotatably supported by a column (not shown), and the holding shaft 21A is not shown. It is designed to be rotated by an air motor. The rotation driving direction of the holding shaft by the air motor is a direction in which the cleaning cloth is wound around the holding shaft 21A. Similar to the cloth holding portion 21, the cloth winding portion 22 includes a winding shaft 22A that is rotatably held by a column (not shown) and is driven to rotate by an air motor in the direction of winding the cleaning cloth. A winding drive roller 22B for driving the cleaning cloth to the side of the winding shaft 22A and a pressing roller 22C for pressing the cleaning cloth 2 against the drive roller 22B are provided. In the present embodiment, the air motor is used as the drive source for rotationally driving the holding shaft 21A and the winding shaft 22A, but the present invention is not limited to this, and it is possible to idle with a predetermined torque (for example, a friction clutch is used). Any general electric motor may be used, and this is the same in the lower surface cleaning section 40 described later.

The drive roller 22B is rotatably supported by a column (not shown) in a cantilever manner, and is rotationally driven at a predetermined angle by a swing motor via a cam clutch. The direction of rotation is such that the cleaning cloth 2 sandwiched between the pressing roller 22C and the winding cloth 22A is conveyed to the winding shaft 22A side, and is not rotated by the action of the cam clutch at the time of swinging back. It has become. The pressure roller 22C is rotatably supported by a holding arm (not shown) that can move away from and move from the drive roller 22B by an air cylinder (not shown), and is urged by the drive roller 22B with a predetermined force by driving the air cylinder. The cleaning cloth 2 is arranged between them.

As shown in the enlarged view of FIG. 2, the press contact roller 30 has its longitudinal ends (both ends in the width direction orthogonal to the transportation of the plate-shaped object) rotatably supported by the lower end of the swing arm 31. It is being touched. The swing arm 31 is swingably supported on a side surface on the upstream side in the transport direction of a support arm 32, which is cantilevered by a column (not shown), through a bracket 33 so as to be swingable substantially at the center in the longitudinal direction, and the upper end thereof. It is connected to a rod of an air cylinder 35 supported by a bracket 34 fixed to the upper surface of the support arm 32 to be in a substantially upright state, and is driven to swing by a predetermined amount by the driving of the air cylinder 35. It Due to the swinging of the swinging arm 31, the pressing roller 30 is pressed by a predetermined pressure against the plate-like object conveyed on the upper surface cleaning section conveyor 12, and a cleaning action position indicated by an imaginary line in the figure, and It can be located at a retreat position indicated by a solid line in the drawing, which is retracted by a predetermined amount from the cleaning operation position.

Further, when the plate-like object conveyed on the upper surface cleaning section conveyor 12 reaches the position where it comes into contact with the pressure contact roller 30 located at the cleaning action position on the side corresponding to the pressure contact roller 30 ... Plate-like object sensors 29 ... Which output signals (detect a plate-like object) are respectively provided (not shown in FIG. 1). The plate-shaped object sensor 29 is a so-called reflection type sensor that detects the presence or absence of an object to be detected by detecting the reflected light of the detection light emitted toward the detection area, and is an explanatory view corresponding to a plan view. As shown in FIG. 2, the upper surface cleaning unit conveyor 12 is arranged to detect the side end surface of the plate-shaped object 1 on the side orthogonal to the direction in which the plate-shaped object is conveyed.

Here, the pressure contact rollers 30 are normally in the retracted position, and the plate-like sensor 29 detects the front end of the plate-like object conveyed on the upper surface cleaning section conveyor 12 (that is, the plate-like object). When the front end of the plate-shaped object reaches the cleaning operation position), the air cylinder 35 is driven to move to the cleaning operation position, and the plate-shaped object exits the detection area of the plate-shaped object sensor 29 (the rear end of the plate-shaped object is cleaned). After passing through the part), it is returned to the retracted position. The idle roller 28 is rotatably supported by a column (not shown) in a cantilever manner, and is immovably provided at a predetermined position as described above.

The cleaning cloth 2 is reversed from the cloth holding portion 21 to the upper side via the lower side of the third idle roller and the lower side of the third pressure contact roller 30C arranged below the cloth holding portion 21. 2 The upper side of the idle roller 28B, the lower side of the second pressure contact roller 30B, the upper side of the first idle roller 28A, and the lower side of the second pressure contact roller 30B are alternately wound around between the drive roller 22B and the pressing roller 22C. It is arranged so as to reach the cross winding portion 22 through the. The path between the third idle roller 28C and the third pressure contact roller 30C interferes with the conveyor roller 13R on the upstream side in the conveyance direction of the lower surface cleaning section conveyor 13 and the endless belt 13B wound around the outer circumference of the conveyor roller 13R. It comes into contact with the outer surface of and is bent.

The lower surface cleaning unit 40 is configured so that the above-described upper surface cleaning unit 20 is arranged upside down. That is, the cross holding section 41 is provided below the front end (downstream side) of the table 13T of the lower surface cleaning section conveyor 13 in the plate-like object conveying direction, and the rear end (upstream side) of the plate-like object conveying direction. The cloth winding parts 42 are arranged on the subordinate side of the sub-parts, and the pressure contact roller 50 faces the lower surface cleaning part conveyor 13 between the cross holding part 41 and the winding part 42 (that is, a portion corresponding to the table 13T). Are arranged at three predetermined intervals (first pressure contact roller 50A, second pressure contact roller 50B and third pressure contact roller 50C in order along the plate-like object conveying direction), and further, the first pressure contact roller 50A and the first pressure contact roller 50A. Between the two pressure contact rollers 50B and between the second pressure contact roller 50B and the third pressure contact roller 50C, and the plate-shaped object transport direction upstream side of the first pressure contact roller 50A, which is the upstream side of the plate-shaped object transport direction, and the plate shape. Transport of goods On the downstream side of the third pressure contact roller 50C, which is the downstream side, in the plate-shaped object conveying direction, the idle rollers 48 ... (First idle roller 48A, second idle roller 48B, A third idle roller 48C and a fourth idle roller 48D) are provided.

The first idle roller 48A, which is the most upstream side of the plate-like object conveying direction (plate-like object introducing side), is the upper side of the cross winding section 42 and the conveyor roller 12F on the downstream side in the conveying direction of the upper surface cleaning section conveyor 12. The fourth idle roller 48D located on the lower side of the upstream side in the transport direction and on the most downstream side in the transport direction of the plate-like object is below the cross holding portion 41 and upstream of the transport conveyor 14 in the plate-wise object transport direction. It is located on the lower side of the downstream side of the conveyor roller 14R in the conveying direction. As a result, the path of the cleaning cloth 4 between the first pressing roller 50A and the first idle roller 48A interferes with the conveyor roller 12F of the upper surface cleaning section conveyor 12 on the downstream side in the plate-like material conveying direction, and the conveyor roller 12F. The endless belt 12B wound around the outer periphery of the cleaning cloth 4 is bent by coming into contact with the outer surface of the endless belt 12B, and the path of the cleaning cloth 4 between the third pressure contact roller 50C and the fourth idle roller 48D is a plate shape of the carry-out conveyor 14. It is set so that it interferes with the conveyor roller 14R on the upstream side in the object conveying direction and comes into contact with the outer surface of the conveyor belt 14B wound around the conveyor roller 14R and bends.

The structure of the cross holding part 41, the cross winding part 42, the pressure contact roller 50, ... And the idle roller 48 is the same as that of the above-mentioned top surface cleaning part 20 except that they are arranged upside down. Is omitted. Although not shown, plate sensors are arranged corresponding to the pressure rollers 50, respectively, and the operation of the pressure rollers 50 by the detection of the plate objects is the same.

Then, the plate-like object cleaning device configured as described above operates as follows. The plate-like material 1 is introduced by the introduction conveyer 11, transferred to the upper surface cleaning unit conveyor 12, sucked by the endless belt 12B (table 12T) by the negative pressure of the vacuum pump 12P, and stably conveyed.

When the front end of the plate-shaped object 1 conveyed by the upper surface cleaning section conveyor 12 is detected by the plate-shaped object sensor 29, the pressure-contact rollers 30 corresponding to the plate-shaped object sensor 29 are retracted. From the position to the cleaning action position, the cleaning cloth 2 is pressed against the upper surface of the plate-like object 1 from slightly behind the front end of the plate-like object 1, and the surface of the plate-like object 1 is wiped clean by the relative movement of the plate-like object 1. Yes (clean). When the plate-shaped object 1 is no longer detected by the plate-shaped object sensor 29 (the rear end of the plate-shaped object 1 passes the cleaning operation position), the pressure contact rollers 30 ... Retreat from the cleaning operation position to the retracted position. To do.

The movement of the pressure contact rollers 30 ... To the cleaning operation position or the retreat from the cleaning operation position to the retreat position is carried out by the first pressure contact roller 30A to the third pressure contact roller as the plate-like object 1 is conveyed. The cleaning cloth 2 is pressed against the rollers 30C in synchronization with the passage of the cleaning action position of the front end of the plate-like object 1 (in other words, the front end of the plate-like object 1 passes through the cleaning action position). Since the hour pressing rollers 30 are in the retracted position and the cleaning cloth 2 is not pressed), it is possible to prevent the cleaning cloth 2 from being scratched by the front edge of the plate 1.

During the cleaning operation, the holding shaft 21A of the cloth holding unit 21 is driven to rotate by the air motor in the direction in which the cleaning cloth 2 is wound around the holding shaft 21A, and the winding shaft of the cloth winding unit 22 is wound. 22A is driven to rotate in a direction of winding the cleaning cloth 2 by an air motor, and further, the winding driving roller 22B of the cloth winding portion 22 is not driven and the cleaning cloth 2 cannot be moved between the pressing roller 22C and the pressing roller 22C. The cleaning cloth 2 between the cloth winding portion 22 (a portion sandwiched between the driving roller 22B and the pressing roller 22C) and the cloth holding portion 21 in the sandwiched state has the same cross by the air motor of the cloth holding portion 21. It is in a stopped state in which the force of winding on the holding portion 21 side acts as tension. As a result, even when the pressure contact rollers 30 ... Retreat or move to the operating position, a constant tension is always applied to the cleaning cloth 2 so that the cleaning cloth 2 is not loosened, and the pressure contact rollers 30 ... The portion of the cleaning cloth 2 that is pressed against the object 1 and used for cleaning is also always constant. In the present embodiment, the air motor is used as the drive source for rotationally driving the holding shaft 21A and the winding shaft 22A, but the present invention is not limited to this, and it is possible to idle with a predetermined torque (for example, a friction clutch is used). Any general electric motor may be used.

When the portion of the cleaning cloth 2 used for cleaning is soiled due to the cleaning action, the drive roller 22B is rotationally driven by a predetermined amount (angle or rotation) to cross the cloth holding portion 21 and the cloth take-up portion. The balance of the portion 22 is unbalanced and the cleaning cloth 2 is wound around the cloth winding portion 22 by a predetermined amount so that the unused portion of the cleaning cloth 2 is at the position for cleaning. During the winding of the cleaning cloth 2, the pressure contact rollers 30 ... Rotate with the movement of the cleaning cloth 2, and the pressure contact rollers 30 ... Do not act as a winding resistance.

Further, the cleaning cloth 2 between the third idle roller 28C and the third pressure contact roller 30C is an endless belt wound around the outer periphery of the conveyor roller 13R on the upstream side in the conveyance direction of the lower surface cleaning section conveyor 13 as described above. The surface of the endless belt 13B that is orbitally driven by being in contact with the outer surface of 13B is cleaned by the cleaning cloth 2, and the upper surface of the plate-like object 1 cleaned by the upper surface cleaning unit 20 is held next. Contamination by the cleaning section conveyor 13 is prevented. The plate-like object 1 whose upper surface has been cleaned by the upper surface cleaning unit 20 has its upper surface adsorbed and held by the lower surface cleaning unit conveyor 13 via the overlapping portions of the upper surface cleaning unit conveyor 12 and the lower surface cleaning unit conveyor 13, The surface is cleaned by the lower surface cleaning unit 40 in the same manner as the upper surface cleaning unit 20.

Here, the cleaning cloth 4 between the first pressing roller 50A and the first idle roller 48A of the lower surface cleaning unit 40 is the outer periphery of the conveyor roller 12F on the downstream side of the upper surface cleaning unit conveyor 12 in the plate-shaped material conveying direction. The cleaning cloth 4 which is in contact with the outer surface of the endless belt 12B wound around the endless belt 12B and between the third pressing roller 30C and the fourth idle roller is the conveyor roller on the upstream side of the carry-out conveyor 14 in the plate-like object conveying direction. The surface of the endless belt 12B of the upper surface cleaning section conveyor 12 and the conveyor belt 14B of the unloading conveyor 14 that are used to carry the plate-like objects are cleaned by contacting the conveyor belt 14B wound around the outer periphery of the la 14R. So that the endless belt 12B and the conveyor belt 14B do not stain the plate-like object 1. It has become. The plate-like object 1 whose lower surface has been cleaned by the lower surface cleaning section 40 is transferred to the unloading conveyor 14 after the suction holding of the lower surface cleaning section conveyor 14 is released at the overlapping section of the lower surface cleaning section conveyor 13 and the unloading conveyor 14. And is carried out of the equipment.

[0030]

[Effect of the device]

 As described above, according to the present invention, since the cloth pressure contact means is formed of the rotatable roller member, the cleaning cloth can be smoothly wound. Further, after the front end of the plate-like object has passed the position corresponding to the cross pressure contact means, the cross pressure contact means is moved and driven to the cleaning action position, so that the cleaning cloth is not damaged by the edge of the plate material. Furthermore, since the conveyor belt, which is the conveyor means, is in contact with the cleaning cloth, the conveyor belt is cleaned by the cleaning cloth, and dust that has been once wiped off reattaches to the plate-like object via the conveyor belt and becomes dirty. It can be prevented from happening.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic configuration of an embodiment of a plate-like object cleaning device according to the present invention.

FIG. 2 is an enlarged view of the pressure contact roller.

FIG. 3 is a view corresponding to a plan view of one end portion of a pressure contact roller showing the arrangement configuration of a plate-shaped object sensor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate-shaped material 2 ... Cleaning cloth 10 ... Conveyor 12 ... Upper surface cleaning part conveyor (conveying means) 13 ... Lower surface cleaning part conveyor (conveying means) 20 ... Upper surface cleaning part 21 ... Cross holding part (cleaning cloth holding means) 22 ... Cross winding unit (cleaning cloth winding unit) 29 ... Plate-like object sensor (detection unit) 30 ... Pressing roller (cross pressure contacting unit) 40 ... Bottom surface cleaning unit 41 ... Cross holding unit (cleaning cloth holding unit) 42 ... Cross Winding portion (cleaning cloth winding means) 49 ... Plate-shaped object sensor (detection means) 50 ... Pressure contact roller (cross pressure contact means)

Claims (4)

[Scope of utility model registration request] 1. A cleaning cloth holding means for rotatably holding a cleaning cloth wound in a roll shape, and a cleaning cloth for winding the cleaning cloth before and after the carrying means for carrying the plate-like object in the plate-like object carrying direction. A cleaning cloth is provided with winding means, and a path of the cleaning cloth from the cleaning cloth holding means to the cleaning cloth winding means is bent to bring the cleaning cloth into contact with the surface of the plate-like object conveyed by the conveying means. In a device provided with a pressure contact means, the cloth pressure contact means is formed of a rotatable roller member, and a cleaning action for urging the cleaning cloth into contact with a surface of a plate-like object conveyed by the conveyer means. And a retracted position separated from the surface of the plate-like object. A cleaning device for a plate-like object, characterized in that it is provided with a drive means for moving the loss pressure contact means. 2. A detecting means capable of detecting a plate-like object conveyed by the conveying means, and the passage of a front end of the conveying plate-like object at a position corresponding to the cross pressure contact means is detected by the detecting means. The cleaning device for a plate-like object according to claim 1, wherein the cross pressure contact means is configured to be moved and driven from the retracted position to the cleaning operation position by the driving means. 3. The plate-shaped article conveying means facing the cross pressure contact means is provided with a negative pressure suction table facing the cross pressure contact means, and a conveyor belt having air permeability that does not hinder the suction action. The plate-like object cleaning device according to claim 1 or 2, wherein the negative-pressure suction table is configured to be movable along a surface of the negative-pressure suction table. 4. The cleaning device for a plate-like object according to claim 3, wherein the conveyor belt is provided in contact with the cleaning cloth at a portion which does not contribute to the conveyance of the plate-like object. .