Cleaning Device

Abstract

This cleaning device cleans a screen mask. The cleaning device is provided with: a cleaning sheet that cleans a screen mask; a roll-shaped supply unit that supplies the cleaning sheet; a cleaning head that presses the cleaning sheet supplied from the supply unit against a back surface of the screen mask; a roll-shaped winding unit that winds a used cleaning sheet; a driving unit that drives the winding unit; a movement mechanism that moves the supply unit, the cleaning head, and the winding unit in the same direction as a supply direction of the cleaning sheet or in a direction opposite to the supply direction; a lifting mechanism that lifts and lowers the cleaning head; and a brake mechanism that allows rotation of the supply unit when the cleaning head is being lowered by the lifting mechanism and restricts the rotation of the supply unit when the cleaning head is being lifted by the lifting mechanism.

Description

[Technical field]

[0001] The technology disclosed in this specification relates to a cleaning device, and more particularly to a technology for cleaning a screen mask provided in a screen printing machine. [Background technology]

[0002] A screen printer transfers solder to a circuit board using a screen mask. When the screen printer is used repeatedly, the solder bleeds and adheres to the back surface of the screen mask. For this reason, the screen printer is provided with a cleaning device for removing excess solder adhered to the back surface of the screen mask. For example, the cleaning device of JP 2011-189668 A includes a cleaning sheet, a roll-shaped supply unit for supplying the cleaning sheet, a cleaning head for pressing the supplied cleaning sheet against the screen mask, a roll-shaped winding unit for winding up the used cleaning sheet, a moving device for moving the cleaning head parallel to the screen mask, and a lifting mechanism for lifting and lowering the cleaning head. When cleaning the back surface of the screen mask, the cleaning head is lifted by the lifting mechanism to press the cleaning sheet against the back surface of the screen mask. By moving the cleaning head in this state, the solder adhering to the back surface of the screen mask is wiped off with the cleaning sheet. A motor is connected to the winding section, and by driving the motor, the used cleaning sheet is wound onto the winding section and an unused cleaning sheet is pulled out from the supply section.

[0003] The cleaning device of JP 2011-189668 A can clean the back surface of the screen mask in both the forward and backward directions. In the forward direction, the cleaning head moves in the same direction as the winding section winds up the cleaning sheet. Therefore, the cleaning sheet is pulled toward the supply section due to friction with the screen mask caused by the movement of the cleaning head. In the forward direction, a motor connected to the winding section is driven to move while winding up the cleaning sheet. This prevents the cleaning sheet from sagging when the cleaning head moves. In the backward direction, the cleaning head moves in the opposite direction to the winding section winding up the cleaning sheet. Therefore, the cleaning sheet is pulled toward the winding section due to friction with the screen mask caused by the movement of the cleaning head. For this reason, the cleaning device of JP 2011-189668 A is provided with a brake mechanism that restricts the rotation of the supply section. In the backward direction, the brake mechanism is operated to prevent the cleaning sheet from sagging when the cleaning head moves. Summary of the Invention [Problem to be solved by the invention]

[0004] The cleaning device of JP 2011-189668 A is capable of cleaning the back surface of a screen mask in a reciprocating manner, and in order to suppress sagging of the cleaning sheet during cleaning, a motor connected to a winding section is driven on the outward path, and a brake mechanism is operated on the return path. For this reason, in conventional cleaning devices, it is necessary to control the elevation and movement of the cleaning head, as well as to control the motor and brake mechanism depending on the direction in which the cleaning head is moved, making the control mechanism of the cleaning device complex.

[0005] This specification discloses techniques that facilitate a control mechanism for preventing cleaning sheets from sagging. [Means for solving the problem]

[0006] A cleaning device disclosed in this specification cleans a screen mask and includes a cleaning sheet for cleaning the screen mask, a roll-shaped supply unit for supplying the cleaning sheet, a cleaning head for pressing the cleaning sheet supplied from the supply unit against the back surface of the screen mask, a roll-shaped winding unit for winding up a used cleaning sheet, a drive unit for driving the winding unit, a movement mechanism for moving the supply unit, the cleaning head, and the winding unit in the same direction as the supply direction of the cleaning sheet and in the opposite direction thereto, a lifting mechanism for lifting and lowering the cleaning head, and a brake mechanism for allowing rotation of the supply unit when the cleaning head is lowered by the lifting mechanism and for restricting rotation of the supply unit when the cleaning head is raised by the lifting mechanism.

[0007] In the above cleaning device, the brake mechanism regulates the rotation of the supply unit in conjunction with the lifting of the cleaning head by the lifting mechanism. That is, while the cleaning head is lifted, the rotation of the supply unit is regulated by the brake mechanism. The rotation of the supply unit only needs to be regulated while the screen mask is being cleaned by the cleaning sheet. The cleaning head is lifted while the screen mask is being cleaned. Therefore, while the cleaning head is lifted, the brake mechanism operates to regulate the rotation of the supply unit while the screen mask is being cleaned. In addition, since the lifting of the cleaning head and the regulation of the rotation of the supply unit are linked, there is no need to separately control the lifting mechanism and the brake mechanism, and it is possible to avoid the control mechanism of the cleaning device becoming complicated. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of a screen printing machine including a cleaning device according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing a schematic configuration of a cleaning device in an embodiment, in which a cleaning head is lowered. [Diagram 3]It is a diagram showing the schematic configuration of the cleaning device according to the embodiment, and shows a state where the cleaning head is raised. [Figure 4] Block diagram showing the control system of the screen printing machine. [Diagram 5] It is a diagram for explaining the process of cleaning the back surface of the screen mask, and shows the case of cleaning in the forward path. [Figure 6] It is a diagram for explaining the process of cleaning the back surface of the screen mask, and shows the case of cleaning in the return path.

Mode for Carrying Out the Invention

[0009] The main features of the embodiments described below are listed. Note that the technical elements described below are each independent technical elements, and exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing.

[0010] In the cleaning device disclosed in this specification, the lifting mechanism may include a first air cylinder that raises and lowers the cleaning head by air. The brake mechanism may include a contact portion that can contact the supply portion, and a second air cylinder that is driven by air to a contact position where the contact portion contacts the supply portion and a separation position where it is separated from the supply portion. Air may be supplied to the second air cylinder from a second air flow path branched from a first air flow path that supplies air to the first air cylinder. According to such a configuration, a configuration for restricting the rotation of the supply portion can be preferably realized in conjunction with the raising of the cleaning head. In addition, by supplying air to the second air cylinder from a second air flow path branched from the first air flow path that supplies air to the first air cylinder, the configuration for supplying air to the second air cylinder can be simplified, the number of parts can be reduced, and the cost can be reduced.

Embodiment

[0011] A cleaning device 10 according to an embodiment will be described with reference to the drawings. The cleaning device 10 is installed in a screen printing machine 100. As shown in FIG. 1, the screen printing machine 100 includes a control device 20, an interface device 22, a circuit board positioning device 24, a screen mask 28, a squeegee device 30, and the cleaning device 10. The screen printing machine 100 receives a circuit board 2 from the upstream side of a mounting line, screen-prints a desired solder on the circuit board 2, and then sends the circuit board 2 downstream of the mounting line. In the following description, the conveying direction of the circuit board 2 in the screen printing machine 100 is defined as the X direction, the direction perpendicular to the X direction in a horizontal plane is defined as the Y direction, and the direction perpendicular to the X direction and the Y direction is defined as the Z direction.

[0012] The circuit board positioning device 24 includes a Y-direction movement mechanism 40 , an X-direction movement mechanism 42 , a rotation mechanism 44 , a lifting mechanism 46 , an X-direction transport mechanism 48 , a clamp mechanism 50 , and a support mechanism 52 .

[0013] The Y-direction movement mechanism 40 is supported on a base of the screen printing machine 100. The Y-direction movement mechanism 40 is capable of moving in the Y direction relative to the base of the screen printing machine 100 by being driven by an actuator (not shown).

[0014] The X-direction moving mechanism 42 is supported by the Y-direction moving mechanism 40. The X-direction moving mechanism 42 is capable of moving in the X direction relative to the Y-direction moving mechanism 40 by being driven by an actuator (not shown).

[0015] The rotation mechanism 44 is supported by the X-direction movement mechanism 42. The rotation mechanism 44 is capable of rotating relative to the X-direction movement mechanism 42 around the Z axis by being driven by a motor (not shown).

[0016] The lifting mechanism 46 is supported by the rotation mechanism 44. The lifting mechanism 46 is capable of moving relative to the rotation mechanism 44 in the Z direction by being driven by an actuator (not shown).

[0017] The X-direction conveying mechanism 48, the clamping mechanism 50, and the support mechanism 52 are supported by the lifting mechanism 46. The X-direction conveying mechanism 48 includes a pair of conveyor belts 54 arranged along the X direction, and servo motors (not shown) for driving the respective conveyor belts 54. Both ends of the circuit board 2 in the Y direction are placed on the pair of conveyor belts 54, and the servo motors are driven, whereby the circuit board 2 is conveyed in the X direction. The distance between the pair of conveyor belts 54 can be adjusted according to the size of the circuit board 2.

[0018] The clamp mechanism 50 can clamp the circuit board 2 from both ends in the Y direction and hold the circuit board 2 at a desired width. The support mechanism 52 can support the circuit board 2 from the underside by abutting a plurality of support pins 56 against the underside of the circuit board 2 held by the clamp mechanism 50.

[0019] The screen mask 28 is a rectangular metal plate-like member, and its four sides are supported by a mask support frame 32 whose position is fixed relative to the base of the screen printer 100. An opening is formed in the center of the screen mask 28 corresponding to the solder pattern to be printed on the circuit board 2. Hereinafter, the opening formed in the screen mask 28 is also referred to as the printing pattern.

[0020] The squeegee device 30 includes a Y-direction movement mechanism 70, squeegee heads 74a and 74b, and squeegees 76a and 76b.

[0021] The Y-direction movement mechanism 70 is supported on a base of the screen printing machine 100. The Y-direction movement mechanism 70 is capable of moving in the Y direction relative to the base by being driven by an actuator (not shown).

[0022] The squeegee heads 74a and 74b are supported by a Y-direction moving mechanism 70. The squeegee heads 74a and 74b are capable of moving in the Z direction relative to the Y-direction moving mechanism 70 by being driven by respective actuators (not shown).

[0023] The squeegee 76a is supported by the squeegee head 74a. The squeegee 76a is tiltable with respect to the squeegee head 74a by the drive of a servo motor (not shown). The squeegee 76b is supported by the squeegee head 74b. The squeegee 76b is tiltable with respect to the squeegee head 74b by the drive of a servo motor (not shown). The squeegees 76a and 76b squeegee the solder supplied from a solder supply device (not shown) onto the upper surface of the screen mask 28 on the printing pattern.

[0024] The cleaning device 10 is disposed between the circuit board positioning device 24 and the screen mask 28. As shown in FIGS. 2 and 3, the cleaning device 10 includes a main body 12, a supply roll 14, a take-up roll 16, a cleaning head 18, a cleaning sheet 60, a Y-direction moving mechanism 80 (see FIG. 1), a lifting air cylinder 82, and a brake mechanism 90.

[0025] The supply roll 14 is cylindrical and is detachably attached to the supply support portion 62. The supply support portion 62 is rotatably supported by the main body 12, and the supply roll 14 rotates integrally with the supply support portion 62. A long cleaning sheet 60 is wound around the supply roll 14. When the supply roll 14 rotates, the cleaning sheet 60 before use is pulled out from the supply roll 14. Specifically, no drive unit such as a motor is connected to the supply support portion 62. For this reason, as will be described later, when the cleaning sheet 60 wound around the supply roll 14 is pulled in the direction in which it is pulled out, the supply roll 14 and the supply support portion 62 rotate, and the cleaning sheet 60 is pulled out as they rotate.

[0026] The winding roll 16 is cylindrical and detachably attached to the winding support part 64. The winding support part 64 is rotatably supported by the main body 12, and the winding roll 16 rotates integrally with the winding support part 64. A motor 66 is connected to the winding support part 64, and the winding support part 64 rotates when driven by the motor 66. As the winding roll 16 rotates, a cleaning sheet 60 is supplied from the supply roll 14, and the cleaning sheet 60 after use is taken up by the winding roll 16. In addition, the motor 66 rotates the winding support part 64 and the winding roll 16, and as the cleaning sheet 60 is taken up, the cleaning sheet 60 is pulled, and the supply roll 14 and the supply support part 62 rotate.

[0027] The cleaning head 18 is disposed between the supply roll 14 and the take-up roll 16, and contacts the lower surface of the cleaning sheet 60 between the supply roll 14 and the take-up roll 16. In detail, the cleaning sheet 60, which is stretched across the supply roll 14 and the take-up roll 16, contacts the upper surface of the cleaning head 18 at an intermediate position between them. As shown in FIG. 3, when the cleaning head 18 is lifted by an elevating air cylinder 82 (described later), the cleaning sheet 60 located on the upper surface of the cleaning head 18 is pressed against the rear surface of the screen mask 28.

[0028] The cleaning sheet 60 is a porous paper with moisture-absorbing properties, and is wound around the supply roll 14. Although paper is used for the cleaning sheet 60 in this embodiment, the material is not limited to this as long as it can wipe off the solder. The cleaning sheet 60 is supplied from the supply roll 14, supported on the upper surface of the cleaning head 18, and taken up by the take-up roll 16.

[0029] The supply roll 14, cleaning head 18, and take-up roll 16 are arranged in the Y direction (specifically, from the -Y direction to the +Y direction) in the order of supply roll 14, cleaning head 18, and take-up roll 16. Therefore, the cleaning sheet 60 is fed in the +Y direction.

[0030] As shown in FIG. 1, the Y-direction moving mechanism 80 is supported on a base (not shown) of the screen printing machine 100. The Y-direction moving mechanism 80 includes a pair of conveyor belts 80a (only one of the pair of conveyor belts 80a is shown in FIG. 1) arranged along the Y direction, and a servo motor (not shown) for driving each of the conveyor belts 80a. By driving the servo motor, the main body 12 (and members such as the supply roll 14, the take-up roll 16, and the cleaning head 18 supported by the main body 12) is moved in the Y direction. The Y-direction moving mechanism 80 can move the main body 12 back and forth in the Y direction. In other words, the Y-direction moving mechanism 80 can move the main body 12 in the same direction as the direction in which the cleaning sheet 60 is supplied (i.e., the +Y direction) (hereinafter, the movement in this direction is also referred to as the "forward path"), and can move the main body 12 in the opposite direction to the direction in which the cleaning sheet 60 is supplied (i.e., the -Y direction) (hereinafter, the movement in this direction is also referred to as the "return path").

[0031] 2 and 3, the lifting air cylinder 82 is fixed to the bottom plate of the main body 12. The lifting air cylinder 82 is connected to an air supply unit 84 via a first air flow path 86. The lifting air cylinder 82 lifts the cleaning head 18 by air being supplied from the air supply unit 84 through the first air flow path 86. When the cleaning head 18 is lifted by the lifting air cylinder 82, the cleaning sheet 60 located on the upper surface of the cleaning head 18 is pressed against the rear surface of the screen mask 28.

[0032] The brake mechanism 90 is configured to be able to regulate the rotation of the supply roll 14. The brake mechanism 90 includes an air cylinder 92 for braking and a contact portion 94.

[0033] The brake air cylinder 92 is fixed to the bottom plate of the main body 12 near the supply roll 14 (below the supply roll 14 in FIGS. 2 and 3). The brake air cylinder 92 is connected to the first air flow path 86 via the second air flow path 88. That is, the second air flow path 88 branches off from the first air flow path 86. The brake air cylinder 92 moves the abutment portion 94 by air being supplied from the air supply unit 84 through a part of the first air flow path 86 and the second air flow path 88 branching off from the first air flow path 86.

[0034] The abutment portion 94 is attached to the tip of the piston of the air cylinder 92 for braking, and is disposed below the supply support portion 62. The abutment portion 94 moves between an abutment position (see FIG. 3) where it abuts against the supply support portion 62 and a spaced position (see FIG. 2) where it is spaced from the supply support portion 62 as the piston of the air cylinder 92 for braking expands and contracts. Specifically, when air is supplied to the air cylinder 92 for braking, the abutment portion 94 moves to the abutment position. When the air supplied to the air cylinder 92 for braking is exhausted, the abutment portion 94 moves to the spaced position, and the supply support portion 62 and the supply roll 14 can rotate. When the abutment portion 94 moves to the abutment position, the abutment portion 94 is pressed against the supply support portion 62, and the rotation of the supply support portion 62 and the supply roll 14 is restricted.

[0035] As described above, the second air flow path 88 branches off from the first air flow path 86. Therefore, air supplied from the air supply unit 84 is supplied to the lifting air cylinder 82 through the first air flow path 86, and is also supplied to the brake air cylinder 92 through the second air flow path 88 branched off from the first air flow path 86. As shown in FIG. 3, when air is supplied from the air supply unit 84, the lifting air cylinder 82 lifts the cleaning head 18, and the brake air cylinder 92 moves the contact portion 94 to the contact position. Therefore, while the cleaning sheet 60 located on the upper surface of the cleaning head 18 is pressed against the back surface of the screen mask 28, the rotation of the supply roll 14 is restricted. On the other hand, as shown in FIG. 2, when air is not supplied from the air supply unit 84 (i.e., when air is exhausted from the lifting air cylinder 82 and the brake air cylinder 92), the cleaning head 18 descends and the contact portion 94 moves to the separated position. Therefore, while the cleaning sheet 60 located on the upper surface of the cleaning head 18 is separated from the rear surface of the screen mask 28, the supply roll 14 is allowed to rotate.

[0036] The control device 20 includes a storage device that stores programs and the like, a processor that executes the programs stored in the storage device, and a communication device that communicates with a production management computer (not shown) that manages the overall operation of the mounting line. The control device 20 controls the operation of each component of the screen printing machine 100 according to instructions from the production management computer. Specifically, as shown in FIG. 4, the control device 20 is connected to the interface device 22, the circuit board positioning device 24, the squeegee device 30, the motor 66, the Y-direction movement mechanism 80, and the air supply unit 84, and controls the interface device 22, the circuit board positioning device 24, the squeegee device 30, the motor 66, the Y-direction movement mechanism 80, and the air supply unit 84. The control device 20 also transmits data indicating the state of the solder printing operation in the screen printing machine 100 to the production management computer.

[0037] The interface device 22 displays the setting state and the working state of the screen printing machine 100 to the operator via a monitor or the like, and receives various inputs from the operator via switches or the like.

[0038] Next, a process of cleaning the back surface of the screen mask 28 by the cleaning device 10 will be described. As described above, the Y-direction movement mechanism 80 moves the main body 12 back and forth in the Y direction. Therefore, the cleaning device 10 cleans the back surface of the screen mask 28 in both the forward and backward directions. During cleaning, the main body 12 moves with the cleaning sheet 60 located on the upper surface of the cleaning head 18 pressed against the back surface of the screen mask 28. Then, a contact area 60a (see FIGS. 5 and 6) of the cleaning sheet 60 that comes into contact with the screen mask 28 is pulled in the opposite direction to the moving direction of the main body 12 due to friction with the screen mask 28. The cleaning sheet 60 is pulled by the screen mask 28, causing the cleaning sheet 60 to sag. In order to suppress this sagging of the cleaning sheet 60, the control device 20 executes the following process.

[0039] First, referring to Fig. 5, a process of the control device 20 when cleaning the back surface of the screen mask 28 on the forward path will be described. When cleaning on the forward path, the control device 20 first controls the air supply unit 84 to supply air. Then, as shown in Fig. 5, the air supplied from the air supply unit 84 is supplied to the lifting air cylinder 82 through the first air flow path 86, and the lifting air cylinder 82 lifts the cleaning head 18. The air supplied from the air supply unit 84 is also supplied to the brake air cylinder 92 through the second air flow path 88 branched off from the first air flow path 86. As a result, the abutment portion 94 moves from the separated position to the abutment position, and the rotation of the supply support portion 62 and the supply roll 14 is restricted.

[0040] Next, the control device 20 controls the Y-direction moving mechanism 80 to move the main body 12 in the +Y direction (the direction indicated by the arrow A), and also supplies a current to the motor 66 to drive the motor 66. This maintains the rotational positions of the winding support part 64 and the winding roll 16. When the motor 66 is driven, a force is applied to the winding support part 64 to rotate in the direction in which the cleaning sheet 60 is wound up. However, as described above, the rotation of the supply roll 14 is restricted by the brake mechanism 90, so that the winding support part 64 and the winding roll 16 are also restricted from rotating to wind up the cleaning sheet 60. Therefore, when the motor 66 is driven, the winding support part 64 and the winding roll 16 do not rotate, but the cleaning sheet 60 is pulled in the +Y direction, which is the direction in which the cleaning sheet 60 is wound up. Therefore, the rotational positions of the winding support part 64 and the winding roll 16 are maintained.

[0041] In the forward movement, the Y-direction moving mechanism 80 moves the main body 12 in the same direction (the direction of the arrow A) as the supply direction of the cleaning sheet 60. Then, the contact area 60a is pulled in the direction (the direction of the arrow B) opposite to the direction in which the main body 12 moves (the direction of the arrow A) due to friction with the screen mask 28. If the motor 66 is not driven at this time, the contact area 60a is pulled in the direction of the arrow B, causing the winding support part 64 to rotate in the opposite direction to the supply direction, causing sagging in the cleaning sheet 60. In this embodiment, in the forward movement, the motor 66 is controlled to apply a force to the winding support part 64 and the winding roll 16 to rotate in the direction in which the cleaning sheet 60 is wound. As a result, the cleaning sheet 60 can be pulled in the opposite direction to the direction in which the contact area 60a is pulled due to friction with the screen mask 28 (the direction of the arrow B), and sagging of the cleaning sheet 60 caused by the movement of the main body 12 can be suppressed.

[0042] Next, referring to FIG. 6, the process of the control device 20 when cleaning the back surface of the screen mask 28 on the return path will be described. When cleaning on the return path, the control device 20 first causes the air supply unit 84 to supply air. Then, in the case shown in FIG. 6 as in FIG. 5, the air supplied from the air supply unit 84 is supplied to the lifting air cylinder 82 through the first air flow path 86, and the lifting air cylinder 82 lifts the cleaning head 18. The air supplied from the air supply unit 84 is also supplied to the brake air cylinder 92 through the second air flow path 88 branched from the first air flow path 86. As a result, the abutment portion 94 moves from the separated position to the abutment position, and the rotation of the supply support portion 62 and the supply roll 14 is restricted. Next, the control device 20 controls the Y-direction movement mechanism 80 to move the main body 12 in the -Y direction (the direction indicated by the arrow C).

[0043] On the return path, the Y-direction movement mechanism 80 moves the main body 12 in a direction (the direction of the arrow C) opposite to the supply direction of the cleaning sheet 60. Then, the contact area 60a is pulled in a direction (the direction of the arrow D) opposite to the direction in which the main body 12 moves (the direction of the arrow C) due to friction with the screen mask 28. If the rotation of the supply roll 14 is not restricted by the brake mechanism 90 at this time, the contact area 60a will be pulled in the direction of the arrow D, causing the supply roll 14 to rotate in the supply direction, and sagging will occur in the cleaning sheet 60.

[0044] In this embodiment, the second air flow path 88 that supplies air to the brake air cylinder 92 branches off from the first air flow path 86 that supplies air to the lifting air cylinder 82, so that when the cleaning head 18 is lifted, the brake mechanism 90 simultaneously restricts the rotation of the supply roll 14. Therefore, even if the contact area 60a is pulled in the opposite direction (the direction of arrow D) to the direction in which the main body 12 moves (the direction of arrow C) on the return path, the brake mechanism 90 restricts the rotation of the supply roll 14, and sagging of the cleaning sheet 60 caused by the movement of the main body 12 can be suppressed.

[0045] In addition, in this embodiment, the lifting of the cleaning head 18 and the regulation of the rotation of the supply roll 14 are linked, so there is no need to separately control the lifting of the cleaning head 18 and the regulation of the rotation of the supply roll 14. This makes it possible to prevent the control by the control device 20 from becoming complicated.

[0046] In this embodiment, the second air flow path 88 that supplies air to the air cylinder 92 for braking is branched off from the first air flow path 86 that supplies air to the air cylinder 82 for lifting. If the air flow path that supplies air from the air supply unit 84 to the air cylinder 92 for braking is provided completely separately from the first air flow path 86 that supplies air to the air cylinder 82 for lifting, a member (e.g., a valve, etc.) for adjusting the supply of air from the air supply unit 84 to the air cylinder 92 for braking needs to be provided separately from the member for adjusting the supply of air from the air supply unit 84 to the air cylinder 82 for lifting. In this embodiment, it is only necessary to configure the air cylinder 92 for braking to be supplied with air when air is supplied to the air cylinder 82 for lifting, so that there is no need to provide a member for adjusting the supply of air from the air supply unit 84 to the air cylinder 92 for braking. This makes it possible to simplify the configuration for supplying air to the air cylinder 92 for braking, and to reduce the number of parts and costs.

[0047] Points to note regarding the cleaning device 10 described in the embodiment will be described below. The supply roll 14 in the embodiment is an example of a "supply section", the take-up roll 16 is an example of a "take-up section", the motor 66 is an example of a "drive section", the Y-direction movement mechanism 80 is an example of a "movement mechanism", the lifting air cylinder 82 is an example of a "first air cylinder", and the braking air cylinder 92 is an example of a "second air cylinder".

[0048] Specific examples of the technology disclosed in this specification have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and variations of the specific examples exemplified above. Furthermore, the technical elements described in this specification or drawings exhibit technical utility alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Furthermore, the technology exemplified in this specification or drawings achieves multiple objectives simultaneously, and achieving one of the objectives itself has technical utility.

Claims

[Claim 1] A cleaning device for cleaning a screen mask, comprising: The main body, a cleaning sheet for cleaning the screen mask; a roll-shaped supply unit that supplies the cleaning sheet; a cleaning head that presses the cleaning sheet supplied from the supply unit against a rear surface of the screen mask; a roll-shaped winding section for winding up the cleaning sheet after use; A drive unit that drives the winding unit; a moving mechanism that moves the supply unit, the cleaning head, and the take-up unit in the same direction as the supply direction of the cleaning sheet and in the opposite direction; a lifting mechanism for lifting and lowering the cleaning head; a brake mechanism that allows rotation of the supply unit when the cleaning head is lowered by the lifting mechanism and restricts rotation of the supply unit when the cleaning head is raised by the lifting mechanism, the lifting mechanism includes a first air cylinder that is provided on a bottom plate of the main body and that lifts and lowers the cleaning head by air; The brake mechanism includes: A contact portion capable of contacting the supply portion; a second air cylinder provided on the bottom plate of the main body and configured to raise and lower the contact portion by air between a contact position where the contact portion contacts the supply portion and a spaced position where the contact portion is spaced from the supply portion; a brake mechanism for braking the cleaning head from a first air flow path that supplies air to the first air cylinder; and a second air flow path that branches off from a first air flow path that supplies air to the first air cylinder.

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