JP5603554B2 - Cleaning device and printing device equipped with the cleaning device - Google Patents

Description

  The present invention relates to a cleaning device for removing deposits from a lower surface of a mask and a mask opening, and a printing device equipped with the cleaning device.

  As this type of printing apparatus, for example, an apparatus for printing a solder paste on a printed board is known. In this apparatus, after the mask is accurately positioned with respect to the printed board above the printed board, the solder paste placed on the mask is spread by a squeegee. At this time, the solder paste is printed on the upper surface of the substrate through the opening provided in the mask. When such a printing process is repeated, the solder paste adheres to the lower surface of the mask and the mask opening, and if this amount of adhesion increases, it causes printing failure. Therefore, for example, it is necessary to clean the mask every time the printing process is performed a predetermined number of times.

  Therefore, a cleaning unit for cleaning the mask is provided in the printing apparatus. As this cleaning unit, for example, there is a cleaning device described in Patent Document 1. In the cleaning device described in Patent Document 1, a supply roll around which an unused cotton wiping cloth (corresponding to the “cleaning sheet” of the present invention) is wound is provided. And while wiping cloth is drawn out from this supply roll, it can wind up to a winding roll. In addition, a pressing table is disposed on the upper right side of the supply roll and the upper left side of the winding roll. More specifically, when the cleaning device is viewed from the side, a triangle is formed by these supply roll, take-up roll and pressing table, and the middle part of the cotton wiping cloth fed out from the supply roll has the above-mentioned triangle shape. While being wound around a pressing table located at the apex, a cotton wiping cloth on the tip side of the pressing table is wound around a winding roll.

  The supply roll, the take-up roll, and the pressing table configured as described above are integrally driven up and down by the cylinder. Then, the middle part of the cotton wiping cloth wound around the pressing table by the upward drive comes into contact with the lower surface of the mask, and the cleaning process is executed. On the other hand, by driving downward, the supply roll, the take-up roll, and the pressing table are integrally lowered, and the middle portion of the cotton wiping cloth is separated from the lower surface of the mask, thereby completing the cleaning process. The take-up roll and the supply roll are configured to rotate by receiving power from the drive motor. After the mask cleaning is completed, the drive motor is operated to remove the wipe from the supply roll by a predetermined length. At the same time, the used wiping cloth, that is, the middle part is taken up by the take-up roll.

Japanese Patent Laid-Open No. 10-217433

  By the way, since the wiping cloth used for the cleaning device or the cleaning unit is an expensive consumable product, it is desired to reduce the running cost by suppressing the area not used for cleaning as much as possible. In order to satisfy this demand, it is necessary to match the length of the wiping cloth fed out after the cleaning process is completed with the length of the wiping cloth in the operation direction used in one cleaning process. For this reason, in the conventional apparatus, adjustment of the feed amount of the wiping cloth was attempted by quantifying the rotation angle of the drive motor.

  However, the above-mentioned demand cannot be satisfied completely only by keeping the rotation angle constant. This is because the diameter of the supply roll and the diameter of the take-up roll both change according to the use situation, and the amount of wiping cloth feed varies. In order to solve this problem, it is conceivable to separately provide detection means for detecting the amount of the wipe wiped and to control the drive motor based on the output from the detection means. However, it is necessary to additionally provide detection means, which makes the apparatus configuration complicated and not economical.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and can accurately control the feed amount to clean the lower surface of the mask at a low running cost without detecting the feed amount of the cleaning sheet sent from the sheet supply unit to the cleaner head. It is an object of the present invention to provide a cleaning device that can be used and a printing device equipped with the cleaning device.

Cleaning equipment according to the invention of this, in order to achieve the above object, a sheet feeding unit for feeding the elongated cleaning sheet in the longitudinal direction, vertically movable between a standby position and the cleaning position in the lower side of the mask The mask is separated from the lower surface of the mask by lowering to the standby position, while the unused sheet portion of the cleaning sheet fed from the sheet supply unit is brought into contact with the lower surface of the mask by moving up to the cleaning position. A cleaner head that cleans the lower surface of the sheet, and a sheet collection unit that collects the cleaning-used sheet unit by rotating the winding shaft in the winding direction to wind up the cleaning sheet. The cleaner head is placed in a lower position and the cleaner head is in a state where the rotation of the take-up shaft in the anti-winding direction is restricted. When the cleaning head is raised to the cleaning position by adjusting the sheet feeding position with respect to the cleaning position, the cleaning sheet is fed out from the sheet feeding unit and the cleaning sheet is fed out from the sheet feeding unit. It is further characterized by further comprising a second adjustment unit for controlling the feed amount of the cleaning sheet that is fed out.

  In order to achieve the above object, the printing apparatus according to the present invention has the same configuration as the squeegee head for printing paste through the opening with the substrate disposed on the lower surface of the mask having the opening, and the cleaning apparatus. And a cleaning unit for cleaning the lower surface of the mask.

  In the invention configured as described above (cleaning device and printing device), since the sheet supply unit is disposed at a position lower than the cleaning position, while the cleaner head stands by at a standby position lower than the cleaning position, The sheet portion that has already been fed out from the sheet supply unit and has not been wound around the sheet collection unit is positioned below the cleaning position. In the present invention, the cleaner head rises from the standby position to the cleaning position in a state where the rotation of the winding shaft in the counter-winding direction is restricted. As a result, the cleaner head moves by pushing the sheet portion upward from the lower side toward the cleaner head, and tension is applied to the cleaning sheet between the sheet supply unit and the sheet collection unit. Since rotation in the winding direction is restricted, unused cleaning sheets are fed out from the sheet supply unit by a feed amount corresponding to the movement amount. In this manner, the unused cleaning sheet is fed from the sheet supply unit only by the lifting operation of the cleaner head. In addition, an unused cleaning sheet can be accurately fed out by a feed amount corresponding to the amount of movement of the cleaner head without providing a detection means for detecting the feed amount of the cleaning sheet.

  By the way, after the cleaner head has moved up to the cleaning position and performed the cleaning process as described above, the cleaner head returns to the standby position, but at that time, the cleaning sheet is loosened by the cleaning sheet between the sheet supply unit and the sheet collection unit. Part is formed. Therefore, by configuring as follows, it becomes possible to eliminate the slack portion and perform the cleaning process continuously. That is, after the cleaner head is lowered or lowered to the standby position in a state where regulation of the operation of the cleaning sheet with respect to the sheet supply unit is provided and the operation of the cleaning sheet from the sheet supply unit is restricted. The take-up shaft may be rotated in the take-up direction to collect the used sheet portion and apply tension to the cleaning sheet between the sheet supply unit and the sheet collection unit.

  The standby position of the cleaner head may be a position lower than the cleaning position, and the cleaner head may engage with the cleaning sheet at the standby position, or may be further spaced downward from the cleaning sheet. Among these, when the cleaner head is made to wait while being engaged with the cleaning sheet at the standby position, the sheet supply unit is adjusted when the standby position is adjusted vertically with respect to the cleaning position and the cleaner head is raised to the cleaning position. You may provide the 1st adjustment part which controls the feed amount of the cleaning sheet drawn | fed out from. As a result, it is possible to adjust the feeding amount of the cleaning sheet flexibly and with higher accuracy.

  Further, in order to adjust the feeding amount of the cleaning sheet, the cleaning sheet is fed from the sheet feeding unit together with the first adjusting unit or instead of the second adjusting unit, and the sheet sending position is adjusted with respect to the cleaning position. A second adjustment unit may be provided. That is, the adjustment of the sheet delivery position by the second adjustment unit controls the amount of cleaning sheet fed from the sheet supply unit when the cleaner head is raised to the cleaning position.

  In addition, when the cleaning sheet is fed out by rotating the roll shaft while the cleaning sheet is rolled up while fixing the rear end portion of the cleaning sheet, the following configuration may be adopted. Good. That is, a rotation detection unit that detects the rotation of the roll shaft, and a use-up detection that detects whether the rotation of the roll shaft is not detected by the rotation detection unit when the cleaner head is raised to the cleaning position. The use of the cleaning part can be accurately detected.

  Further, the sheet collecting unit includes an air actuator that constitutes a power source of the take-up shaft, and a one-way clutch that is provided between the air actuator and the take-up shaft and transmits power generated by the air actuator only in the take-up direction. You may comprise so that it may have. By adopting such a configuration, the apparatus can be configured at a lower cost than the conventional apparatus that configures the sheet collection unit by combining a motor, a speed reduction mechanism, and the like.

  As described above, according to the present invention, since the unused cleaning sheet is fed from the sheet supply unit by the lifting operation of the cleaner head, the amount of cleaning sheet fed from the sheet supply unit to the cleaner head is detected. Without this, the mask lower surface can be cleaned at a low running cost by accurately controlling the feed amount.

  FIG. 1 is a perspective view showing an embodiment of a printing apparatus according to the present invention. In the figure, a state in which the main body cover is removed is shown in order to clearly show the internal configuration of the apparatus. FIG. 2 is a plan view showing a schematic configuration of the printing apparatus in a state where no mask is installed, and FIG. 3 is a side view showing a schematic configuration of the printing apparatus in a state where a mask is installed. FIG. 4 is a block diagram showing the electrical configuration of the printing apparatus. In this printing apparatus, the substrate table 20 is movable on the base 10 in the front-rear direction (Y-axis direction) of the apparatus. Further, conveyors 21 and 21 are provided on the base 10, and carry-in conveyors 31 and 31 are provided on the right side of the apparatus, while carry-out conveyors 32 and 32 are provided on the left side of the apparatus.

  The carry-in conveyor 31 is provided to carry the unprocessed substrate 1 on which the solder paste is to be printed while conveying it in the X-axis direction. When the substrate table 20 is moved in the Y-axis direction and the conveyors 21 and 21 on the substrate table 20 are positioned between the conveyors 31 and 31 and the conveyors 32 and 32, the conveyors 31 and 31 are driven. The substrate 1 before the printing process is transported to the substrate table 20.

  The substrate 1 is held on the substrate table 20 by a substrate clamp unit (not shown). The substrate table 20 is driven by a substrate table control unit 43 of the control unit 40, and a mask 51 whose periphery is held by a frame member 50 above the substrate table 20 is fixedly held by a mask clamp unit 52. The solder paste supplied from the solder supply unit 60 onto the mask 51 is spread on the mask 51 by reciprocating the squeegee 71 of the squeegee unit 70 in the Y-axis direction. At this time, the solder paste is printed on the upper surface of the substrate 1 through the opening provided in the mask 51.

  After this printing process, the substrate table 20 is again moved and positioned between the carry-in conveyors 31, 31 and the carry-out conveyors 32, 32. And the processed board | substrate 1 which received the printing process by the conveyors 21 and 21 provided in the board | substrate table 20 being driven by the board | substrate table control part 43 is conveyed to the carrying-out conveyors 32 and 32. FIG. Thereafter, when the carry-out conveyors 32 and 32 are driven, the printed substrate 1 is carried out from the printing apparatus.

  In this embodiment, a substrate camera 81 for imaging a fiducial mark or the like of the substrate 1 is attached so as to be movable in the X-axis direction along a beam 12 fixed to the base 10. The substrate table 20 is provided with a mask camera 82 for capturing a fiducial mark (not shown) on the lower surface of the mask 51 and identifying the position, type, etc. of the mask 51 movably in the X-axis direction. Yes.

  Further, a cleaner 90 corresponding to the “cleaning device” and the “cleaning unit” of the present invention is attached to the front side of the substrate table 20 in the Y-axis direction. Move in the axial direction. The cleaner 90 is a device that cleans and removes the solder paste and the like attached to the mask 51 by printing the solder paste on the substrate 1. The configuration and cleaning operation of the cleaner 90 will be described in detail later.

  In the printing apparatus configured as described above, a control unit 40 for controlling the entire printing apparatus is provided. The control unit 40 includes an arithmetic processing unit 41, a program storage unit 42, a substrate table control unit 43, and a cleaner control unit 44. The arithmetic processing unit 41 is constituted by a CPU or the like, and repeats the printing process by controlling each unit of the printing apparatus according to a printing program stored in advance in the program storage unit 42. Since the solder paste or the like adheres to the mask 51 by repeatedly performing the printing process, the arithmetic processing unit 41 causes the cleaner 90 to be removed via the cleaner control unit 44 in accordance with a cleaning program stored in the program storage unit 42 in advance. The mask 51 is cleaned at a predetermined timing (for example, after a predetermined number of executions of the printing process). Reference numeral 45 in the figure is a display / operation unit for displaying a printing program, a cleaning program, etc., and for an operator to input information such as various data and commands to the control unit 40. Reference numeral 46 denotes an input / output control unit.

  Next, the configuration of the cleaner 90 and the cleaning operation will be described in detail. FIG. 5 is a perspective view showing the overall configuration of the cleaner. FIG. 6 is a side view of the cleaner of FIG. In the cleaner 90, the base member 911 extends in the X-axis direction, and side plates 912a and 912b are erected on both ends of the base member 911 in the X-axis direction. The base member 911 and the side plates 912a and 912b form a main body 91 of the cleaner 90. Further, a cleaner head 92 for cleaning the mask 51 with the cleaning sheet CS is provided above the main body 91. As the cleaning sheet CS, conventionally, a long sheet made of a natural material or an artificial material and made of flexible, breathable cloth, paper, leather, or the like has been used.

  Further, a sheet supply unit 93 that supplies an unused cleaning sheet CS toward the cleaner head 92 at a position below the cleaner head 92 is provided in the main body unit 91, and an unused cleaning sheet fed from the sheet supply unit 93 is provided. After the cleaner head 92 cleans the lower surface of the mask 51 using the (unused sheet portion), the used cleaning sheet CS is conveyed downward and is provided in the main body portion 91 at a position below the sheet supply portion 93. It is wound around the winding shaft of the recovery unit 94 and recovered. Hereinafter, the configuration of the sheet supply unit 93, the sheet collection unit 94, and the cleaner head 92 will be described in this order.

  The sheet supply unit 93 rotatably supports a supply roll 931 obtained by winding a long unused cleaning sheet CS in a roll shape with respect to the main body 91 by two shafts 932a and 932b. Of these two shafts 932a, 932b, the shaft 932a has an arrow-shaped tip, and is provided rotatably at the center of the right side plate 912a with the tip facing the left side plate 912b. ing. The other shaft 932b also has an arrow-shaped tip, and is rotatably provided at the center of the left side plate 912b with the tip facing the right side plate 912a. Between the supply shafts 932a and 932b arranged in this way, a supply roll 931 in which an unused long cleaning sheet CS is wound around a hollow roll shaft (feed-out shaft) in a roll shape is disposed. And while the front-end | tip part of the shaft 932a is inserted with respect to the right hollow end part of a roll axis | shaft, the front-end | tip part of the shaft 932b is pushed in with the spring which abbreviate | omits illustration with respect to the left hollow end part. For this reason, the supply roll 931 is sandwiched between the two shafts 932a and 932b while being pressed from the left to the right, and is rotatably supported by the main body 91.

  In the present embodiment, the sheet supply unit 93 includes an electromagnetic clutch 933 corresponding to the “regulator” of the present invention. That is, the rear end portion of the shaft 932 a is connected to the right side plate 912 a of the main body portion 91 via the electromagnetic clutch 933. For this reason, while the electromagnetic clutch 933 is closed, the shaft 932a is connected to the right side plate 912a and the rotation of the shaft 932a is restricted. As a result, the supply roll 931 is braked, and the cleaning sheet CS is prohibited from operating. On the other hand, when the electromagnetic clutch 933 is opened by the cleaner control unit 44 and the connection between the shaft 932a and the right side plate 912a is released, the supply roll 931 is rotatable with respect to the main body 91 of the cleaner 90, and from the supply roll 931. The cleaning sheet CS can be operated.

  Further, a guide bar 934 is provided in the sheet supply unit 93 to guide the fed cleaning sheet CS to the cleaner head 92. Both end portions of the guide bar 934 are inserted into support holes 913 formed in the left and right side plates 912a and 912b, respectively, and are detachably fixed to the left and right side plates 912a and 912b by fixing brackets such as nuts. In this embodiment, three support holes 913 are formed in each of the left and right side plates 912a and 912b, and the mounting position of the guide bar 934 can be changed in three stages of positions P1, P2, and P3. This has a function of changing the feeding amount of the sheet CS when the cleaning sheet CS is fed out as will be described later. This point will be described in detail later.

  The configuration of the sheet supply unit 93 is not limited to this, and any configuration can be adopted as long as the long cleaning sheet CS can be fed out in the long direction. Further, the restricting means is not limited to those other than the electromagnetic clutch, and any means can be used as long as the operation of the cleaning sheet CS can be restricted. Further, the mounting position of the guide bar 934 is not limited to “3”, and is arbitrary.

  As described above, the unused cleaning sheet CS fed from the sheet supply unit 93 is used for cleaning the mask 51 by the cleaner head 92 and then guided to the sheet collection unit 94. The sheet collecting unit 94 supports a winding shaft 941 rotatably with respect to the main body 91 by two shafts 942a and 942b. These two shafts 942 a and 942 b are rotatably supported by the main body 91 in the same manner as the sheet supply unit 93. That is, the shaft 942a has an arrow-shaped tip, and is rotatably provided on the lower portion of the right side plate 912a with the tip facing the left side plate 912b. The other shaft 942b also has an arrow-shaped tip, and is rotatably provided at the lower portion of the left side plate 912b with the tip facing the right side plate 912a. A hollow take-up shaft 941 for taking up the used cleaning sheet is arranged between the take-up shafts 942a and 942b arranged in this way, and the shaft 942a is disposed with respect to the right hollow end of the take-up shaft 941. The distal end portion of the shaft 942b is pushed into the left hollow end portion by a spring (not shown), and the winding shaft 941 is pushed from the left side to the right side. The shaft 941 is sandwiched between the two shafts 942 a and 942 b, and the winding shaft 941 is rotatably supported with respect to the main body 91.

  Further, in this embodiment, as shown in FIG. 7, in order to restrict the winding shaft 941 from rotating only in a predetermined winding direction (+ α) and rotating in the counter-winding direction (−α), one-way. A clutch 944 is used. That is, the central portion of the winding shaft 942a is supported by the right side plate 912a via the one-way clutch 944, and the winding shaft 942a and the winding shaft 941 are rotatable only in the winding direction (+ α). .

  Further, in order to take up and collect the used cleaning sheet CS on the take-up shaft 941 configured as described above, the sheet collecting unit 94 is provided with a drive mechanism 945 at the rear end of the take-up shaft 942a. It has been. In this drive mechanism 945, an air cylinder 945 a is used as a power source for the winding shaft 941. Here, a rear end portion of the air cylinder 945a, that is, an end portion on the side opposite to the piston is rotatably supported by the right side plate 912a. One end of the link plate 945b is connected to the piston portion of the air cylinder 945a, while the other end of the link plate 945b is connected to the rear end portion of the winding shaft 942a via the one-way clutch 945c. . For this reason, when the piston portion of the air cylinder 945a extends upon receiving an extension command from the cleaner control unit 44, the extension motion is converted into a rotational motion by the link plate 945b and transmitted to the winding shaft 942a via the one-way clutch 945c. Is done. As a result, the winding shaft 942a and the winding shaft 941 rotate in the winding direction (+ α), and the used cleaning sheet CS can be wound. Conversely, even when the piston portion of the air cylinder 945a is retracted by the cleaner control unit 44, the two one-way clutches 944 and 945c act to cause the winding shaft 942a and the winding shaft 941 to be in the counter-winding direction (−α). Rotation is prevented.

  FIG. 8 is a plan view of the cleaner head as viewed from above. In the cleaner head 92, the head main body 921 is provided so as to be movable up and down with respect to the upper portion of the main body 91. The head main body 921 is connected to a piston portion of an air cylinder 922 fixed to an upper portion of the outer surface of the side plate 912a. When the piston portion of the air cylinder 922 is retracted, as shown by a solid line in FIG. The head main body 921 is inserted into a notch formed on the upper rear side of the main body 91. The position Pw of the head main body 921 at this time corresponds to the “standby position” of the present invention. On the other hand, when the piston portion of the air cylinder 922 is extended by the cleaner control unit 44, the head main body 921 is lifted together with the cleaning sheet, as indicated by a one-dot chain line in FIG. The position Pc of the head main body 921 at this time corresponds to the “cleaning position” of the present invention, and as will be described later, an unused cleaning sheet CS is fed out from the sheet supply section 93 by the upward movement of the head main body 921, and the head main body 921 The sheet portion of the cleaning sheet CS supported by the above is pressed against the lower surface of the mask 51, and the cleaning process of the mask 51 is executed.

  Two types of through holes 924 and 925 are formed in the sheet support surface 923 provided on the top of the head main body 921. One through-hole 924 is a suction nozzle, and is connected to one end of a suction hose 926 extending from the side of the head main body 921. The suction hose 926 is connected to a suction unit 928 (FIG. 4) while being guided by a hose guide 927. For this reason, when the vacuum valve (not shown) is opened, suction is performed by supplying negative pressure to the suction nozzle 924, while suction by the suction nozzle is stopped when the vacuum valve is closed and opened to atmospheric pressure. Is done.

  The other through-hole 925 is a solvent discharge nozzle and is connected to a solvent supply unit (not shown) via a solvent supply tube 929. Therefore, when it is necessary to use a solvent, when the solvent supply unit is activated and the solvent is pumped to the solvent discharge nozzle 925 through the solvent supply tube 929, the cleaning sheet positioned between the head main body 921 and the mask 51 is used. The solvent can be supplied to the CS sheet portion so that the cleaning process can be performed satisfactorily.

  Next, the operation of the cleaner 90 configured as described above will be described in detail with reference to FIG. While the printing process is being performed in the printing apparatus, the cleaner 90 is in a standby state. That is, as shown in FIG. 9A, in the sheet supply unit 93, the electromagnetic clutch 933 is closed and a brake is applied to the supply roll 931. Further, in the cleaner head 92, the piston portion of the air cylinder 922 is retracted and the head main body 921 is lowered to the standby position Pw and is largely separated from the lower surface of the mask 51. Further, in the sheet collecting portion 94, the piston portion of the air cylinder 945a is stationary at the retracted position. Note that reference numeral SA1 in the drawing denotes a used sheet portion used in the previous cleaning process. In this embodiment, the cleaning sheet CS is wound around the sheet support surface 923 of the head main body 921 (engaged state), and between the sheet supply unit 93 and the sheet collection unit 94. Is waiting in a state where tension is applied.

  When reaching a preset condition, for example, a cleaning start condition such as executing a printing process a predetermined number of times, the arithmetic processing unit 41 performs a cleaner control unit 44 according to a cleaning program stored in the program storage unit 42 in advance. After the cleaner 90 is controlled via “”, “head up”, “movement of the cleaner 90 in the Y-axis direction”, “head down” and “winding” are performed in this order, and then the original standby state is restored. Hereinafter, each operation will be described.

  In this “head raising” operation, the electromagnetic clutch 933 is opened and the brake for the supply roll 931 is released. At the same time or after releasing the brake, the piston of the air cylinder 922 is extended to raise the head main body 921 to the cleaning position Pc. At this time, although the cleaning sheet CS is pulled between the sheet supply unit 93 and the sheet collection unit 94 due to the rising of the head main body 921, stress acts on the sheet collection unit 94, but the winding shaft 941 is acted on by the one-way clutch 944. Can be effectively prevented from rotating in the anti-winding direction (−α). The stress accompanying the upward movement of the head main body 921 also acts on the sheet supply unit 93. However, since the brake for the sheet supply unit 93 is released at the same time or has already been released, the supply roll 931 receives the stress. The unused cleaning sheet CS is fed out from the used sheet portion SA1, and the unused sheet portion SA2 adjacent to the sheet supply portion 93 side moves to the sheet support surface 923 of the head main body 921, while the replacement is used. The finished sheet portion SA1 moves from the sheet support surface 923 of the head main body 921 to the sheet collecting portion 94 side (FIG. 9B). Therefore, by adjusting the head lift amount, the entire used sheet portion SA1 is moved from the sheet support surface 923 to the sheet collecting portion 94 side by one “head lift”, and the entire unused sheet portion SA2 is supported by the sheet. It can be moved on the surface 923.

  When a solvent is used in the cleaning process, the solvent supply unit is operated during this “head rise” to discharge the solvent to the unused sheet portion SA2. As a result, the unused sheet portion SA2 contains a solvent suitable for cleaning, and the lower surface of the mask 51 can be cleaned well.

  When the feeding of the unused sheet part SA2 to the sheet support surface 923 is completed by “head rise”, the electromagnetic clutch 933 is closed and a brake is applied to the sheet supply part 93 (FIG. 9C). This prevents the cleaning sheet CS from being fed out and rewound from the supply roll 931 and prevents the unused sheet portion SA2 from being displaced relative to the sheet support surface 923. In this state, the substrate table controller 43 moves the substrate table 20 from the Y axis direction front side to the Y axis direction rear side. As the substrate table 20 moves in the Y-axis direction, the cleaner 90 moves in the Y-axis direction, and the unused sheet portion SA2 (including the solvent when solvent is supplied) is applied to the lower surface of the mask 51. The relative movement in the Y-axis direction causes the lower surface of the mask 51 to be cleaned.

  When the cleaner 90 moves to the rear side in the Y-axis direction of the mask 51 and the cleaning of the entire lower surface of the mask 51 is completed, the piston body of the air cylinder 922 is moved backward while the brake is applied to the sheet supply unit 93 to make the head body. 921 is lowered from the cleaning position Pc to the standby position Pw. As a result, a slack portion is formed in the cleaning sheet CS on the sheet collecting portion 94 side with respect to the head main body 921, and the used sheet portions SA1 and SA2 approach the sheet collecting portion 94 side (FIG. 9D). .

  After the head main body 921 is lowered to the standby position Pw, the piston portion of the air cylinder 945a is extended while the brake is applied to the sheet supply portion 93, so that the winding shaft 942a and the winding shaft 941 are wound in the winding direction (+ α ) (FIG. 9E). Thus, the used cleaning sheet CS is wound up by the slack between the sheet supply unit 93 and the sheet collection unit 94, and tension is applied to the cleaning sheet CS again between the sheet supply unit 93 and the sheet collection unit 94.

  When the “winding” is completed in this way, the cleaner 90 is moved to the original standby position Pw (FIG. 9) by moving the substrate table 20 forward in the Y-axis direction by the substrate table control unit 43 while the head main body 921 is positioned at the standby position Pw. Return to (a)).

  As described above, according to the present embodiment, since the sheet supply unit 93 is disposed at a position lower than the cleaning position Pc, while the cleaner head 92 is waiting at the standby position Pw, the sheet supply unit 93 is The cleaning sheet CS (sheet part) that has already been fed and that has not been wound around the sheet collecting part 94 is located below the cleaning position Pc. Further, in the standby state, tension is applied to the cleaning sheet (sheet portion) between the sheet supply unit 93 and the sheet collection unit 94, and in the anti-winding direction (−α) of the winding shaft 941. The rotation of is regulated. When the cleaning process is started, the cleaner head 92 is raised from the standby position Pw to the cleaning position Pc, and the unused cleaning sheet CS is fed out from the sheet supply unit 93 by a feeding amount corresponding to the moving amount. . Accordingly, the unused cleaning sheet CS can be accurately fed out by the feed amount corresponding to the movement amount of the cleaner head 92 without providing a detection means for detecting the feed amount of the cleaning sheet CS. As a result, the lower surface of the mask 51 can be cleaned at a low running cost.

  In addition, after the cleaning process is completed and the cleaner head 92 is lowered to the standby position Pw, the take-up shaft 941 is moved in the take-up direction (with the brake force applied to the sheet supply unit 93 to restrict the operation of the cleaning sheet CS). The used sheet portion is recovered by rotating to + α), and the cleaning sheet is tensioned between the sheet supply portion 93 and the sheet recovery portion 94 to return to the original standby state. Therefore, the next cleaning process can be started smoothly. In this embodiment, the used cleaning sheet CS is wound immediately after the cleaner head 92 is lowered to the standby position Pw. However, the used cleaning sheet CS is wound at a certain time after the descent or in parallel with the descent. The cleaning sheet CS may be wound up. In short, it is only necessary that the cleaner 90 is in the above-described standby state when the next cleaning process is executed.

  In the above embodiment, the air cylinder 945a is used as a power source for the take-up shaft 941, and the power generated by the air cylinder 945a is transmitted to the take-up shaft 941 by the one-way clutch 945c so that the take-up shaft 941 is anti-winded. This prevents rotation in the direction (−α). By adopting such a configuration, the cost of the apparatus can be reduced as compared with the conventional apparatus in which the sheet collection unit is configured by combining a motor, a speed reduction mechanism, and the like. In this embodiment, rotational power is generated by using the air cylinder 945a and the link plate 945b. However, instead of these, for example, an air-type rotary actuator may be used, and the entire air actuator may be a winding shaft 941. It can be used as a power source.

  Further, in the above embodiment, the cleaning sheet CS is sent out from the guide bar 934 of the sheet supply unit 93 toward the cleaner head 92, and the mounting positions P1, P2, and P3 of the guide bar 934 are the “sheet sending position” of the present invention. It corresponds to. In the cleaner 90, the mounting positions P1, P2, and P3 of the guide bar 934 can be changed in three stages, and the sheet feeding positions P1, P2, and P3 can be adjusted. That is, the support hole 931 and the guide bar 934 correspond to the “second adjusting portion” of the present invention, and the amount of feed of the cleaning sheet CS that is fed out by raising the cleaner head 92 by changing the mounting position of the guide bar 934 is changed. Can be controlled. In particular, the cleaning sheet CS has flexibility as described above, and the amount of elongation varies depending on the material, width, thickness, and the like of the cleaning sheet CS. Therefore, the cleaning sheet CS can always be fed into the cleaner head 92 with an appropriate feeding amount by controlling the feeding amount according to the cleaning sheet CS to be used.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, in the above embodiment, the feed amount of the cleaning sheet CS is optimized by adjusting the sheet delivery positions P1, P2, and P3. However, the feed amount of the cleaning sheet CS is controlled by adjusting the movement amount of the cleaner head 92. May be. For example, in the cleaner 90 in which the cleaner head 92 engages with the cleaning sheet CS at the standby position Pw as in the above embodiment, when the standby position Pw is changed in the vertical direction with respect to the cleaning position Pc, the standby position Pw to the cleaning position Pc. The distance changes. As a result, the amount of movement when the cleaner head 92 moves to the cleaning position Pc to perform the cleaning process changes, and the amount of unused cleaning sheet CS fed from the sheet supply unit 93 increases or decreases accordingly. Therefore, in order to drive the cleaner head 92 up and down, an actuator that can change the standby position Pw with respect to the cleaning position Pc in multiple stages is equipped as the “first adjusting portion” of the present invention, and according to the cleaning sheet CS to be used. Then, the feed position may be controlled by adjusting the standby position Pw. With this configuration, the cleaning sheet CS can always be fed into the cleaner head 92 with an appropriate feed amount.

  Further, in the above-described embodiment, the supply roll 931 that is wound up in a roll shape while the rear end portion of the unused long cleaning sheet CS is fixed to the hollow roll shaft (feeding shaft) is used, and the cleaner head 92 is lifted. Accordingly, the cleaning sheet CS is fed out. At this time, the roll shaft rotates as the sheet is fed. On the other hand, when the cleaning sheet CS is used up, the cleaning sheet CS is not fed out, and the roll shaft is stopped. Therefore, for example, as illustrated in FIG. 10, a rotation detection unit 95 that detects the rotation of the roll shaft may be provided, and the use of the cleaning sheet CS may be detected based on the detection result of the rotation detection unit 95. As the rotation detection unit 95, a combination of a rotation detection dog 951 and an optical sensor 952 can be used as shown in FIG. This rotation detecting dog 951 is provided with a plurality of notches at equal angular intervals on the outer periphery of the disk member, and is fixed to a shaft 932a that rotatably supports the roll shaft. Therefore, the roll shaft, the shaft 932a, and the rotation detection dog 951 are rotated by feeding the cleaning sheet CS. The optical sensor 952 is arranged so as to detect the outer periphery of the rotation detection dog 951, and a pulse signal is output from the optical sensor 952 according to the rotation of the dog 951. The optical sensor 952 is connected to the input / output control unit 46, and the pulse signal is given to the arithmetic processing unit 41 via the input / output control unit 46. Based on this pulse signal, the arithmetic processing unit 41 determines whether or not the roll shaft is rotating when the cleaner head 92 is raised to the cleaning position Pc, and detects that the roll shaft is not rotating. It is determined that the cleaning sheet CS is used up. In this embodiment, the arithmetic processing unit 41 functions as the “use-up detection unit” of the present invention, and can automatically detect use-up of the cleaning sheet CS. In addition, when the use-up is detected, the fact may be displayed on the display / operation unit 45 or notified.

  In the above embodiment, the use of the sheet is detected on the sheet supply unit 93 side. However, the use of the sheet may be detected on the sheet collection unit 94 side, and the same effect as the above embodiment can be obtained. . That is, when the cleaning sheet CS is used up, even if an extension command is issued to the air cylinder 945a of the sheet collecting unit 94, the cleaning sheet CS cannot be wound, so the piston portion of the air cylinder 945a remains retracted. It has become. Therefore, even if a sensor is provided to detect that the piston portion of the air cylinder 945a is at the original position (retracted position), and the extension command is output twice from the arithmetic processing portion 41, the piston portion does not leave the original position. If the sensor detects this, the arithmetic processing unit 41 may be configured to detect the use up of the cleaning sheet CS.

  Furthermore, in the above embodiment, when the friction transmission surfaces are provided at both ends of the supply roll 931, the cleaning sheet CS can be adjusted to rotate by being pulled with a predetermined force. By doing so, the cleaning sheet CS that has been fed out even when the brake is released maintains the tension.

1 is a perspective view showing an embodiment of a printing apparatus according to the present invention. 1 is a plan view illustrating a schematic configuration of a printing apparatus. 1 is a side view illustrating a schematic configuration of a printing apparatus. 2 is a block diagram illustrating an electrical configuration of the printing apparatus. FIG. It is a perspective view showing the whole cleaner composition which is one embodiment of the cleaning device concerning the present invention. It is a side view of the cleaner of FIG. It is a figure which shows the structure of a sheet | seat collection | recovery part. It is the top view which looked at the cleaner head from the upper part. It is a figure which shows typically operation | movement of the cleaner of FIG. It is a figure which shows other embodiment of the cleaning apparatus concerning this invention.

DESCRIPTION OF SYMBOLS 1 ... Board | substrate 41 ... Arithmetic processing part 44 ... Cleaner control part 51 ... Mask 90 ... Cleaner (cleaning apparatus, cleaning unit)
92 ... Cleaner head 93 ... Sheet supply unit 94 ... Sheet collection unit 95 ... Rotation detection unit 913 ... Support hole (second adjustment unit)
931 ... Supply roll 933 ... Electromagnetic clutch (regulator)
934 ... Guide bar (second adjusting part)
941 ... Winding shaft 944 ... One-way clutch 945 ... Drive mechanism 945 a ... Air cylinder 945 c ... One-way clutch 951 ... Rotation detection dog 952 ... Optical sensor CS ... Cleaning sheets P1, P2, P3 ... Sheet feeding position Pc ... Cleaning position Pw ... Standby position

Claims (4)

A sheet supply unit for feeding out a long cleaning sheet in the longitudinal direction;
A lower side of the mask is provided so as to be movable up and down between a cleaning position and a standby position, and is separated from the lower surface of the mask by being lowered to the standby position, while being raised to the cleaning position from the sheet supply unit. A cleaner head for cleaning the lower surface of the mask by bringing an unused sheet portion of the cleaning sheet that has been paid out into contact with the lower surface of the mask;
A sheet collecting unit that collects the cleaning-used sheet unit by rotating the winding shaft in the winding direction and winding the cleaning sheet;
The sheet supply unit is disposed at a position lower than the cleaning position,
The cleaner head rises to the cleaning position in a state where the rotation of the take-up shaft in the anti-winding direction is restricted, and the cleaning sheet is fed out from the sheet supply unit,
The cleaning sheet is sent out from the sheet supply unit, and the amount of the cleaning sheet fed out from the sheet supply unit when the cleaner head is raised to the cleaning position by adjusting the sheet delivery position with respect to the cleaning position is set. A cleaning device further comprising a second adjusting unit to be controlled. The sheet feeding unit includes a roll shaft wound with the cleaning sheet into a roll while fixing a rear end portion of the cleaning sheet, according to claim 1, wherein said roll axis is the cleaning sheet is fed out by rotating A cleaning device according to claim 1,
A rotation detector that detects rotation of the roll shaft;
A cleaning device further comprising a use-up detecting unit that detects use-up of the cleaning sheet when the rotation detection unit does not detect rotation of the roll shaft when the cleaner head is raised to the cleaning position. The sheet collection unit is provided between the air actuator and the take-up shaft that constitutes a power source of the take-up shaft, and transmits the power generated by the air actuator only in the take-up direction. The cleaning device according to claim 1 , further comprising a one-way clutch. A squeegee head for printing a paste on the surface of the substrate through the opening in a state in which the substrate is disposed below a mask having an opening;
A printing apparatus having the same configuration as the cleaning apparatus according to claim 1 , further comprising a cleaning unit that cleans a lower surface of the mask.

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