JP2011189669A - Detector for advancing quantity of paper member, screen printing machine, method for detecting advancing quantity of paper member, and screen printing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detector for detecting an advancing quantity of a paper member which accurately detects an advancing quantity of the paper member that advances while being drawn out of a reel or taken up on the reel, and to provide a screen printing machine, a method for detecting an advancing quantity of the paper member, and a screen printing method. <P>SOLUTION: The detector includes: a rotary member 46a which is installed in contact with the outer peripheral surface of a roll type paper member 48 wound on a follower reel 44; a rotation speed detecting part 46b which detects the rotation speed of the rotary member 46a that rotates in accordance with the drawing-out of the paper member 48 from the follower reel 44; and an advancing quantity calculating part 46c which calculates the advancing quantity of the paper member 48 advanced while being drawn out of the follower reel 44. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a paper member progress detection device, a screen printing machine, a paper member progress detection method, and a screen printing method for detecting the progress of a paper member that is advanced by being pulled out from or taken up by a reel. It is.

  The screen printing machine includes a mask having a pattern hole corresponding to the electrode of the substrate and a squeegee movable in a direction parallel to the mask, and the substrate and the mask are aligned so that the pattern hole of the mask matches the electrode of the substrate. A configuration in which the paste is transferred to the electrode of the substrate through the pattern hole of the mask by sliding the squeegee on the mask in a contact state and scraping the paste such as solder paste supplied on the mask on the mask It has become.

  Such a screen printing machine includes a mask cleaning device for wiping off the paste adhered to the lower surface of the mask in order to prepare for screen printing performed on the substrate to be loaded next after the screen printing on the substrate is finished. (For example, patent document 1). This mask cleaning device has a base portion that moves relative to the mask in the lower part of the mask in parallel, and is movable between an extended position that is a raised position relative to the base portion and a retracted position that is a lowered position relative to the base portion. A holding member, a driving reel and a driven reel provided in the base portion, and a part of the paper member that is stretched between the driving reel and the driven reel is pressed against the protruding position. The member is pressed against the lower surface of the mask, and in this state, the base portion moves relative to the lower side of the mask in parallel, whereby the paper member wipes off the paste adhered to the lower surface of the mask.

  In such a mask cleaning device of a screen printing machine, after cleaning several masks, it is necessary to update the portion (cleaning area) supported by the pressing member of the paper member. By rotating the driven reel in the winding direction of the paper member in a state where the rotation of the driven reel is regulated by the brake that regulates the rotation of the side reel, and rotating the driven reel against the regulating force by the brake The roll-shaped paper member wound around the driven reel is pulled out by a predetermined amount.

Japanese Patent Laid-Open No. 2007-14489

  However, in the conventional mask cleaning device, the amount of progress of the paper member that is advanced by being pulled out from the driven reel or wound by the driving reel is set to the rotation angle of the driven reel that rotates when the paper member is pulled out. Therefore, the detection accuracy varies depending on the radial dimension of the roll-shaped paper member wound around the driven reel, and the amount of progress of the paper member cannot be accurately detected. For this reason, there have been problems such as the old and new cleaning areas becoming dirty before and after the renewal, and the mask becoming dirty during cleaning of the mask, and the gap between the old and new cleaning areas being excessively wide and the paper member being wasted.

  Accordingly, the present invention provides a paper member progress detection device, a screen printing machine, a paper member progress detection method, and a paper member progress detection method capable of accurately detecting the progress of a paper member that is advanced by being pulled out of or taken up by a reel. An object is to provide a screen printing method.

  The paper member advance detection device according to claim 1 is a rotating member provided in contact with an outer peripheral surface of a roll-shaped paper member wound around a reel, and a paper member drawn out of the reel or a paper member by a reel. A rotation number detection unit that detects the rotation number of the rotating member that has rotated in response to the winding of the rotation member, and is drawn from or wound by the reel based on the rotation number of the rotation member detected by the rotation number detection unit And a progress amount calculation unit that calculates the progress amount of the paper member that has progressed through the above step.

  The screen printer according to claim 2 has a pattern hole corresponding to the electrode of the substrate, and a mask that is in contact with the substrate so that the electrode of the substrate and the pattern hole coincide with each other, and a mask that is in contact with the substrate. A squeegee that slides and pastes the paste supplied on the mask on the mask to transfer the paste to the electrode of the substrate through the pattern hole of the mask, and the lower part of the mask moves relative to the mask in parallel. Base portion, a pressing member provided on the base portion, a driving reel and a driven reel provided on the base portion, and an upper surface of the pressing member that is spanned between the driving reel and the driven reel. A paper member that is pressed against the lower surface of the mask by the pressing member, and a roll-shaped page wound around the driven reel or the driving reel. -Number of rotations to detect the number of rotations of the rotating member provided in contact with the outer peripheral surface of the member and the rotating member rotated in accordance with the withdrawal of the paper member from the driven reel or the winding of the paper member by the driving reel Based on the number of rotations of the rotation member detected by the detection unit and the number of rotations detection unit, the amount of progress for calculating the amount of progress of the paper member that is advanced by being pulled out of the driven reel or wound by the drive side reel Based on the progress amount of the paper member calculated by the calculation portion, the progress amount calculation portion, a cleaning area update operation control means for positioning the new cleaning area of the paper member on the upper surface of the pressing member, and a new paper member The base moves relative to the mask with the cleaning area pressed against the lower surface of the mask by the pressing member. Paste wiping operation control means for wiping off the paste adhered on the lower surface of the mask and the mask on which the paste adhered on the lower surface is wiped in contact with the substrate and sliding the squeegee on the mask to paste onto the substrate electrode Screen printing execution control means for transferring the image.

  The paper member advance detection method according to claim 3, wherein the rotating member provided in contact with the outer peripheral surface of the roll-shaped paper member wound around the reel is a paper member drawn out of the reel or a paper member by the reel. Based on the detected number of rotations of the rotating member and the detected number of rotations of the rotating member, the amount of progress of the paper member that has been pulled out or taken up by the reel is calculated based on the detected number of rotations of the rotating member. Process.

  The screen printing method according to claim 4 has a pattern hole corresponding to the electrode of the substrate, a mask that is in contact with the substrate so that the electrode of the substrate matches the pattern hole, and a mask that is in contact with the substrate. A squeegee that slides and pastes the paste supplied on the mask on the mask to transfer the paste to the electrode of the substrate through the pattern hole of the mask, and the lower part of the mask moves relative to the mask in parallel. Base portion, a pressing member provided on the base portion, a driving reel and a driven reel provided on the base portion, and an upper surface of the pressing member that is spanned between the driving reel and the driven reel. A screen printing method by a screen printing machine comprising a paper member having a cleaning region located on the bottom surface of the mask pressed by a pressing member The rotating member provided in contact with the outer peripheral surface of the roll-shaped paper member wound around the reel or the driving side reel is adapted to pull out the paper member from the driven side reel or take up the paper member by the driving side reel. A step of detecting the number of rotations, and a step of calculating the amount of progress of the paper member that has been advanced by being pulled out of the driven reel or wound by the drive side reel, based on the detected number of rotations of the rotating member. Based on the calculated amount of progress of the paper member, the step of positioning a new cleaning region of the paper member on the upper surface of the pressing member, and the new cleaning region of the paper member was pressed against the lower surface of the mask by the pressing member Paste attached to the lower surface of the mask by moving the base part relative to the mask in the state And a step of wiping, a mask paste is wiped adhered to the lower surface is brought into contact with the substrate, and a step of transferring the paste to the electrode of the substrate by sliding a squeegee on the mask.

  In the present invention, the amount of progress of the paper member that is advanced by being drawn from the reel or wound by the reel by the number of rotations of the rotating member provided in contact with the outer peripheral surface of the roll-shaped paper member wound around the reel. Since the calculation is performed, the amount of progress of the paper member can be accurately detected regardless of the radial dimension of the roll-shaped paper member wound around the reel.

The top view of the screen printer in one embodiment of the present invention The front view of the screen printer in one embodiment of the present invention The side view of the screen printer in one embodiment of the present invention The top view of the mask with which the screen printing machine in one embodiment of this invention is equipped The perspective view of the mask cleaning apparatus with which the screen printer in one embodiment of this invention is provided. (A) (b) The side view of the mask cleaning apparatus with which the screen printer in one embodiment of this invention is provided The partial cross section side view of the mask cleaning apparatus with which the screen printer in one embodiment of this invention is provided The figure which shows the state which is cleaning the mask with the mask cleaning apparatus with which the screen printer in one embodiment of this invention is provided. The block diagram which shows the control system of the screen printer in one embodiment of this invention The figure which shows the structure of the paper member progress amount detection apparatus with which the screen printer in one embodiment of this invention is provided. The flowchart which shows the execution procedure of the screen printing operation by the screen printer in one embodiment of this invention (A) (b) Operation | movement explanatory drawing of the screen printer in one embodiment of this invention (A) (b) Operation | movement explanatory drawing of the screen printer in one embodiment of this invention (A) (b) Operation | movement explanatory drawing of the screen printer in one embodiment of this invention (A) (b) (c) Operation explanatory diagram of the screen printer in one embodiment of the present invention (A) (b) (c) Operation explanatory diagram of the screen printer in one embodiment of the present invention The flowchart which shows the execution procedure of the mask cleaning operation | movement which the screen printer in one embodiment of this invention performs (A) (b) Explanatory drawing of the update operation | movement of the cleaning area | region of the mask cleaning apparatus with which the screen printer in one embodiment of this invention is provided. (A) (b) Explanatory drawing of the update operation | movement of the cleaning area | region of the mask cleaning apparatus with which the screen printer in one embodiment of this invention is provided.

  Embodiments of the present invention will be described below with reference to the drawings. A screen printing machine 1 shown in FIGS. 1, 2 and 3 is a kind of electronic component mounting apparatus constituting an electronic component mounting line for mounting substrate production. A substrate 2 is carried in and placed on the surface of the substrate 2. After performing screen printing for transferring a paste Pst (see FIG. 3) such as a solder paste or a conductive paste onto the provided electrode 3, the substrate 2 is transferred to an electronic component mounting machine (not shown) on the downstream side. The operation to carry out is executed continuously. Hereinafter, for convenience of explanation, the transport direction of the substrate 2 in the screen printing machine 1 is the X axis direction (left and right direction in FIG. 1), and the horizontal direction perpendicular to the X axis direction is the Y axis direction (up and down direction in FIG. 1). ) And the vertical direction is the Z-axis direction. The Y-axis direction is the front-rear direction of the screen printing machine 1 and the X-axis direction is the horizontal direction of the screen printing machine 1. Further, in the front-rear direction, the operator OP (FIG. 1) of the screen printing machine 1 performs the operation on the screen printing machine 1 (below the paper surface in FIG. 1) is the front side of the screen printing machine 1, and the opposite side (see FIG. 1). 1) is the rear side of the screen printer 1.

  1, 2, and 3, the screen printing machine 1 according to the present embodiment includes a substrate holding / moving unit 12 provided on a base 11, and a plate-like mask provided above the substrate holding / moving unit 12. 13, a pair of front and rear squeegees 14, a camera unit 15, and a mask cleaning device 16.

  2 and 3, the substrate holding / moving unit 12 includes a horizontal moving unit 21, a lifting / lowering unit 22, a conveyor unit 23, and a substrate holding unit 24.

  The horizontal moving unit 21 moves in the X-axis direction with respect to the Y table 21a by the operation of the Y table 21a that moves in the Y-axis direction with respect to the base 11 by the operation of the Y-table drive motor My, and the operation of the X-table drive motor Mx. X table 21b, θ table 21c rotating around Z axis with respect to X table 21b, base table 21d fixed to the upper surface of θ table 21c, and a plurality of lifting tables provided extending upward from the upper surface of base table 21d It consists of a guide 21e.

  The elevating unit 22 is guided by a plurality of elevating table guides 21e of the horizontal moving unit 21 and elevates with respect to the base table 21d. The elevating unit 22a extends upward from the upper surface of the elevating table 22a. It consists of a lifting guide 22b.

  In FIG. 3, the conveyor unit 23 includes a pair of front and rear conveyor mechanisms 23a that move up and down with respect to the base table 21d together with the lift table 22a. Each conveyor mechanism 23a extends in the X-axis direction, and is provided with a belt conveyor support member 31 attached to the upper end of the receiving unit lifting guide 22b, and a belt conveyor supported by the belt conveyor support member 31 and extending in the X-axis direction. 32, and the front and rear conveyor mechanisms 23a operate synchronously (the belt conveyor 32), thereby transporting the substrate 2 in the X-axis direction.

  2 and 3, the substrate holding part 24 is a pair of front and rear clamp members 24a (also shown in FIG. 1) provided on the upper portions of the pair of front and rear belt conveyor support members 31 provided in the conveyor part 23 so as to be movable in the Y-axis direction. The lower receiving unit support table 24b is moved up and down by being guided by the lower receiving unit lifting guide 22b, and the lower receiving unit 24c provided on the upper surface of the lower receiving unit supporting table 24b. The lower receiving unit 24c supports the substrate 2 on the conveyor unit 23 from below by moving up and down with respect to the lifting table 22a together with the lower receiving unit support table 24b. The front and rear clamping members 24a are clamped by sandwiching both sides in the Y-axis direction of the substrate 2 supported at both ends by the front and rear belt conveyors 32 and supported at the lower surface by the lower receiving unit 24c from the outside of the substrate 2.

  In FIGS. 1 and 2, at the positions on both sides in the X-axis direction (upstream side and downstream side in the conveyance direction of the substrate 2) of the conveyor unit 23 that constitutes the substrate holding and moving unit 12, the screen printing machine 1 (see FIG. 1 and the substrate loading conveyor 25 that conveys (loads) the substrate 2 that has been loaded from the left side of the sheet of FIG. 2 and delivers it to the conveyor unit 23, and the substrate 2 that has been delivered from the conveyor unit 23 to the outside of the screen printer 1 A substrate carry-out conveyor 26 for carrying (carrying out) is provided (on the right side in FIG. 1 and FIG. 2). The substrate carry-in conveyor 25 and the substrate carry-out conveyor 26 are each composed of a pair of front and rear conveyor mechanisms (indicated by reference numerals 25a and 26a in FIG. 1), like the conveyor unit 23.

  In FIG. 1 and FIG. 4, the mask 13 is supported by a mask frame 13w made of a rectangular frame-like member in plan view, and a rectangular region surrounded by the mask frame 13w has a plurality of areas on the substrate 2. A large number of pattern holes 13 a corresponding to the electrodes 3 are provided. That is, the mask 13 has a large number of pattern holes 13 a formed according to the arrangement of the electrodes 3 on the substrate 2.

  In FIG. 1, two sets of substrate-side positioning marks mk are provided at diagonal positions of the substrate 2. On the other hand, in FIG. 4, the mask 13 is provided with a pair of mask side positioning marks MK arranged corresponding to the substrate side positioning marks mk. When the substrate 2 is brought into contact with the mask 13 with the substrate-side positioning mark mk and the mask-side positioning mark MK aligned vertically, the electrode 3 of the substrate 2 and the pattern hole 13a of the mask 13 are aligned vertically. Become.

  The mask 13 is provided with a pair of mask support rails 27 (provided by the operator OP holding both ends of the mask 13 with both hands and extending in the Y-axis direction from the front of the screen printing machine 1 to above the substrate holding and moving unit 12. 1 and FIG. 4), and is pushed backward until the leading portion of the mask frame 13w comes into contact with a stopper 27a (FIGS. 1 and 4) provided on the mask support rail 27, so that a predetermined position is obtained. Installed.

  In FIG. 1 and FIG. 2, a pair of gate-shaped frames 28 are provided on the base 11 so as to straddle the substrate carry-in conveyor 25 and the substrate carry-out conveyor 26 in the Y-axis direction. Both end portions of the X-axis stage 29a extending in the X-axis direction are supported so as to be slidable in the Y-axis direction. A camera support stage 29b is provided on the X-axis stage 29a so as to be movable in the X-axis direction. The camera unit 15 is attached to the camera support stage 29b. The camera unit 15 includes a first camera 15a whose imaging field is directed downward and a second camera 15b whose imaging field is directed upward (FIG. 3).

  In FIG. 1, both ends of a squeegee base 40 extending in the X-axis direction are supported by the pair of portal frames 28, and the squeegee base 40 can reciprocate in the Y-axis direction along the portal frame 28. ing. The squeegee base 40 is provided with the pair of front and rear squeegees 14 facing each other in the Y-axis direction. Each squeegee 14 is made of a “spar” -like member extending in the X-axis direction, and is attached to the squeegee base 40 so as to be movable up and down.

  5 and 6 (a) and 6 (b), the entire mask cleaning device 16 provided in the screen printer 1 is provided so as to be movable in the horizontal plane direction (here, the Y-axis internal direction). A base portion 41 attached to the shaft stage 29a and relatively moving in parallel with the mask 13 below the mask 13, a nozzle 42 as a pressing member, a pair of reels (a driving reel 43 and a driven reel 44), A plurality of tension rollers 45 and a paper member advance detection device 46 are provided.

  The nozzle 42 as a whole has a rectangular frame shape extending in the X-axis direction, and is provided so as to be movable up and down with respect to the base portion 41. The nozzle 42 is extended to the cylinder mounting portion 41a of the base portion 41 so as to extend in the vertical direction, and is extended to the base portion 41 (FIG. 6 (a)) and retracted position is the lowering position. (FIG. 6B) can be moved (lifted).

  5 and 6 (a) and 6 (b), the driving side reel 43 and the driven side reel 44 are rotatably attached to two parallel horizontal shafts (shaft members 43a and 44a) provided in the base portion 41. The plurality of tension rollers 45 are also attached to the shaft members 43a and 44a and a horizontal shaft member. A paper member 48 is suspended between the driving reel 43 and the driven reel 44 via a plurality of tension rollers 45.

  The drive side reel 43 can be driven in a direction in which the paper member 48 is taken up by a reel drive motor 50 provided in the base portion 41. On the other hand, the driven-side reel 44 is rotated by the paper member 48 when the paper member 48 is pulled out, but the brake 51 that restricts the rotation of the driven-side reel 44 (FIGS. 5 and 6A, 6B). By operating the, the paper member 48 can be prevented from being pulled out from the driven reel 44.

  6 (a) and 6 (b), the paper member progress amount detection device 46 includes a cylindrical rotating member 46a that is rotatable around an axis member parallel to the rotating shaft 44a of the driven reel 44. The rotating member 46 a is urged by a rotating member urging mechanism 52 provided in the cylinder mounting portion 41 a of the base portion 41, and the cylindrical outer peripheral surface of the roll-shaped paper member 48 wound around the driven reel 44. It comes in contact with the outer peripheral surface. The paper member advancing amount detection device 46 detects the advancing amount (here, the drawing amount) of the paper member 48 that is advanced by being pulled out from the driven reel 44 based on the number of rotations of the rotating member 46a.

  In a state where the nozzle 42 is located at the overhang position (FIG. 6A) or the storage position (FIG. 6B), the rotation of the driven reel 44 is restricted by the brake 51 and the reel drive motor 50 is A weak current is supplied to apply a driving force in the winding direction of the paper member 48 to the driving reel 43, and a constant tension is applied so that the paver member 48 is not slackened.

  6A and 7, the portion of the paper member 48 that is located on the upper surface of the nozzle 42 (supported by the nozzle 42) in a state where the nozzle 42 is located at the protruding position is supported by the nozzle 42. This is the cleaning region 48a pressed against the lower surface of the mask 13 with the paste Pst (the remaining residue of the paste Pst) attached to the lower surface (see also FIG. 8).

  In FIG. 7, the inside of the nozzle 42 of the mask cleaning device 16 is an air suction conduit 42a penetrating vertically. By supplying a vacuum pressure into the air suction conduit 42a, the cleaning region of the paper member 48 is obtained. Air can be sucked into the air suction pipe line 42a through 48a.

  In this screen printing machine 1, the control device 60 (FIG. 9) performs each operation of the substrate carry-in conveyor 25 as a substrate carrying path for carrying the substrate 2, the conveyor unit 23 of the substrate holding and moving unit 12, and the substrate carry-out conveyor 26. The substrate transport path operating mechanism 61 (FIG. 9) including an actuator (not shown) is controlled to perform the clamping operation of the substrate 2 by the clamp member 24a. The control device 60 includes a clamp member operating mechanism including an actuator (not shown). This is done by performing the operation control 62 (FIG. 9).

  Movement of the Y table 21a relative to the base 11 in the Y-axis direction, movement of the X table 21b relative to the Y table 21a in the X-axis direction, rotation of the θ table 21c relative to the X table 21b (ie, the base table 21d) around the Z axis The control device 60 operates the Y table drive motor My and the X table drive motor for the operations of raising and lowering the elevation table 22a relative to the base table 21d and raising and lowering the lower support unit support table 24b relative to the elevation table 22a (that is, lower support unit 24c). This is done by controlling the operation of the substrate holding / moving unit operating mechanism 63 (FIG. 9) including an actuator including Mx.

  Movement of the camera unit 15 in the horizontal plane, that is, movement of the X-axis stage 29a in the Y-axis direction with respect to the pair of portal frames 28 and movement of the camera support stage 29b in the X-axis direction with respect to the X-axis stage 29a Each control is performed when the control device 60 controls the operation of the camera unit moving mechanism 64 (FIG. 9) including an actuator (not shown). The relative movement of the mask cleaning device 16 with respect to the mask 13 is also performed when the control device 60 controls the operation of the camera unit moving mechanism 64 to move the X-axis stage 29a in the Y-axis direction.

  The operation control of the squeegee base 40 for reciprocating the front and rear squeegees 14 in the Y-axis direction is performed by the control device 60 controlling a squeegee moving mechanism 65 (FIG. 9) including an actuator (not shown). Further, the raising / lowering operation of each squeegee 14 with respect to the squeegee base 40 is performed by the control device 60 controlling the operation of a squeegee raising / lowering cylinder 66 (FIGS. 2, 3 and 9) attached to the upper part of the squeegee base 40. .

  The first camera 15a constituting the camera unit 15 is controlled by the control device 60 to image the substrate side positioning mark mk of the substrate 2 held by the substrate holding unit 24 included in the substrate holding and moving unit 12, The two camera 15b is controlled by the control device 60 and images the mask side positioning mark MK provided on the mask 13. Both the image data obtained by imaging with the first camera 15a and the image data obtained by imaging with the second camera 15b are input to the control device 60 (FIG. 9).

  Control of raising and lowering the nozzle 42 with respect to the base portion 41 of the mask cleaning device 16 is performed by the control device 60 performing operation control of the nozzle raising and lowering cylinder 47 described above (FIG. 9). Further, the winding operation of the paper member 48 by the rotation operation of the driving side reel 43 of the mask cleaning device 16 is performed by the control device 60 performing the operation control of the reel driving motor 50 (FIG. 9), and the driven side reel. The rotation restriction of 44 is performed by the control device 60 performing the operation control of the brake 51 described above (FIG. 9).

  6 (a) and 6 (b), the paper member progress detection device 46 is provided in contact with the outer peripheral surface of a roll-shaped paper member 48 wound around the driven reel 44, and the paper member 48 is on the driven side. In addition to the above-described rotating member 46a that rotates in the opposite direction to the driven reel 44 when pulled out from the reel 44, the number of rotations of the rotating member 46a that is rotated in accordance with the withdrawal of the paper member 48 from the driven reel 44 is set. Based on the number of rotations detected by the rotation number detection unit 46b (FIG. 9) and the number of rotations of the rotation member 46a detected by the number of rotations detection unit 46b, the amount of progress of the paper member 48 that has been advanced by being pulled out from the driven reel 44 is measured. The progress amount calculation unit 46c that performs the calculation is provided, and the information on the progress amount of the paper member 48 calculated by the progress amount calculation unit 46c is the control device 6. Is input (FIG. 9).

  Although the structure which detects the amount of progress of the paper member 48 by the paper member progress amount detection device 46 is arbitrary, for example, as shown in FIG. 10, the rotating shaft of the rotating member 46 a is arranged on the cylindrical outer peripheral surface of the rotating member 46 a. A plurality of slits SL extending in a direction parallel to the direction (here, the X-axis direction) are provided at equal intervals in the rotation direction of the rotating member 46a (for example, 20 slits are provided at intervals of 18 °), and a rotation speed detection unit The light emitting element F1 and the light receiving element F2 as 46b may be provided outside and inside the rotating member 46a, respectively. In the paper member advance detection device 46 having such a configuration, when the paper member 48 is pulled out from the driven reel 44 while rotating the driven reel 44 (arrow A shown in FIG. 10), the paper member progress amount detecting device 46 rotates accordingly. When the member 46a rotates (arrow B shown in FIG. 10), the rotation angle θ of the rotating member 46a can be obtained based on the number of intermittent times of the inspection light L from the light emitting element F1 received by the light receiving element F2. Based on the rotation angle θ of the member 46a, the progress amount of the paper member 48 can be detected (calculated). Here, for example, 20 slits SL are provided in the rotation member 46a at intervals of 18 degrees in the circumferential direction, and the number of intermittent inspection lights detected according to the withdrawal of the paper member 48 is N times. In this case, it can be said that the rotation member 46a has rotated N / 20, and therefore when the radius of the rotation member 46a is r, the amount of advancement of the paper member 48 from the driven reel 44 of the paper member 48 at this time ( The amount of withdrawal) M is calculated as M = 2π × r × N / 20 by the progress amount calculation unit 46 c, and the information is input to the control device 60.

  As described above, the paper member advance amount detection device 46 included in the screen printing machine 1 according to the present embodiment detects the advance amount of the paper member 48 that advances by being pulled out from the reel (driven reel 44). The amount of progress detection method is executed, and a rotating member 46 a provided in contact with the outer peripheral surface of the roll-shaped paper member 48 wound around the driven-side reel 44 is provided with the rotation of the paper member 48 from the driven-side reel 44. A step of detecting the number of rotations rotated according to the drawer, and a step of calculating the amount of progress of the paper member 48 that has been advanced by being pulled out from the driven reel 44 based on the detected number of rotations of the rotating member 46a. It has become a thing.

  The air suction operation performed through the paper member 48 (cleaning region 48a) of the mask cleaning device 16 is controlled by the control device 60 by controlling the operation of a suction mechanism 67 (FIG. 9) including an actuator (not shown). This is done by supplying a vacuum pressure into 42 air suction lines 42a.

  Next, the operation procedure of the screen printing machine 1 will be described with reference to the flowchart of FIG. 11 and the explanatory diagrams of FIGS. The control device 60 of the screen printing machine 1 places the lifting table 22a in the lowered position with respect to the base table 21d and the lower receiving unit 24c in the lowered position with respect to the lifting table 22a (FIG. 12A). When it is detected by a detection means (not shown) that the substrate 2 has been loaded into the substrate carry-in conveyor 25 from another device or the like (not shown) installed on the upstream side of the screen printing machine 1, The conveyor unit 23 is operated in conjunction to carry the substrate 2 into the screen printing machine 1 (arrow C shown in FIG. 12A), and the substrate 2 into which the conveyor unit 23 is loaded is determined by a detection means (not shown). When it is detected that the transport stop position is reached, the operation of the conveyor unit 23 is stopped and the substrate 2 is stopped (FIG. 12B). Substrate loading step shown in step ST1 of).

  When the loading of the substrate 2 is finished, the control device 60 raises the lower receiving unit 24c (with the lower receiving unit support table 24b) with respect to the lifting table 22a while keeping the lifting table 22a at the lowered position with respect to the base table 21d. When the upper end of the lower receiving unit 24c comes into contact with the lower surface of the substrate 2, the raising of the lower receiving unit 24c is stopped (FIG. 13 (a)). Then, the clamp member 24a is operated (arrow E1 shown in FIG. 13B), and both sides of the substrate 2 on the conveyor portion 23 are clamped by the front and rear clamp members 24a (FIG. 13B).

  After clamping the substrate 2 with the front and rear clamping members 24a, the control device 60 further raises the lower receiving unit 24c with respect to the lifting table 22a while keeping the lifting table 22a in the lowered position with respect to the base table 21d. The substrate 2 is pushed up by the receiving unit 24c (FIG. 14 (a), arrow D2 shown in the figure). As a result, the substrate 2 is raised while sliding both ends in the Y-axis direction with respect to the clamp member 24a (the substrate 2 is separated upward from both the belt conveyors 32 of the conveyor unit 23), and the receiving unit 24c is moved to the lifting table 22a. When the upper surface of the substrate 2 is almost at the same height as the upper surfaces of the clamp members 24a, the push-up of the lower receiving unit 24c is stopped. As a result, the substrate 2 is held by the substrate holding unit 24 (FIG. 14A) (substrate holding step shown in step ST2 of FIG. 11).

  After holding the substrate 2 by the substrate holding unit 24 as described above, the control device 60 controls the operation of the camera unit moving mechanism 64 (the X-axis stage 29a is moved in the Y-axis direction and the camera support stage 29b is moved). The first camera 15a is positioned immediately above the substrate-side positioning mark mk provided on the substrate 2 to cause the first camera 15a to image the substrate-side positioning mark mk, The second camera 15b is positioned immediately below the mask side positioning mark MK provided on the mask 13, and the second camera 15b is caused to image the mask side positioning mark MK. Then, the control device 60 grasps the position of the substrate 2 from the obtained image data of the substrate-side positioning mark mk, grasps the position of the mask 13 from the obtained image data of the mask-side positioning mark MK, The horizontal holding unit 21 provided in the substrate holding / moving unit 12 is controlled to move the substrate holding unit 24 (and hence the substrate 2) in the horizontal plane, and the substrate side positioning mark mk and the mask side positioning mark MK are moved up and down. The substrate 2 is positioned with respect to the mask 13 in the horizontal plane direction (positioning step shown in step ST3 of FIG. 11).

  When the positioning of the substrate 2 and the mask 13 in the horizontal plane direction is finished, the control device 60 raises the lifting table 22a with respect to the base table 21d (arrow F1 shown in FIG. 14B), and the substrate 2 is covered. The upper surface, which is the printing surface, is brought into contact with the mask 13 from below (FIG. 14B). The contact process shown in step ST4 of FIG. As a result, the pattern hole 13a of the mask 13 and the electrode 3 on the substrate 2 are aligned in the vertical direction.

  When the control device 60 brings the substrate 2 into contact with the mask 13, the operation of the screen printing machine 1 is temporarily interrupted, and the operator OP is prompted to supply the paste Pst via an image display or the like by a display device (not shown). The operator OP determines whether or not to supply (supplement) the paste Pst based on the amount of the paste Pst currently remaining on the mask 13, and determines that the supply of the paste Pst should be performed separately. The paste Pst is supplied onto the mask 13 by the prepared paste supply syringe 70 (FIG. 15A). Then, when the supply of the paste Pst is finished, an operation restart button (not shown) is operated. The operator OP operates the operation restart button even when it is determined that the supply of the paste Pst is unnecessary.

  When the control device 60 determines whether or not the operation resumption button has been operated after step ST4 (first determination step shown in step ST5 in FIG. 11), and determines that the operation resumption button has been operated In this case, the operation interruption of the screen printing machine 1 is canceled, the squeegee 14 (the squeegee base 40) is reciprocated in the Y-axis direction, and the paste Pst is filled in the pattern hole 13a of the mask 13, whereby the paste Pst Is transferred onto the electrode 3 of the substrate 2 (transfer step shown in step ST6 of FIG. 11).

  In the transfer operation of the paste Pst to the substrate 2 by the squeegee 14, first, the front squeegee 14 (the squeegee 14 on the left side in FIG. 15) is lowered and the lower edge thereof is brought into contact (contact) with the upper surface of the mask 13. Thereafter, the squeegee base 40 is moved rearward in the Y-axis direction, and the front squeegee 14 is slid on the mask 13 to scrape the paste Pst to the upper surface region of the rear clamp member 24a (FIG. 15B). Arrow G1) shown in the inside. When the paste Pst is scraped to the upper surface area of the rear clamp member 24a, the movement of the squeegee base 40 is stopped, the front squeegee 14 is lifted away from the mask 13 and the rear squeegee 14 (FIG. 15). The squeegee 14 on the right side of the paper is lowered and the lower edge thereof is brought into contact (contact) with the upper surface of the mask 13. Then, the squeegee base 40 is moved in the direction opposite to the arrow G1, and the rear squeegee 14 is slid on the mask 13 to scrape the paste Pst to the upper surface region of the front clamp member 24a (FIG. 15 ( c) Arrow G2) shown in the figure. As a result, the paste Pst is transferred onto the electrode 3 of the substrate 2 through the pattern hole 13 a of the mask 13.

  After transferring the paste Pst onto the electrode 3 of the substrate 2, the control device 60 lowers the lifting table 22a with respect to the base table 21d (arrow F2 shown in FIG. 16A), and removes the substrate 2 from the mask 13. They are separated (FIG. 16 (a)). As a result, plate separation is performed, and the paste Pst is printed on the electrode 3 of the substrate 2 (plate separation step shown in step ST7 of FIG. 11).

  When the printing of the paste Pst on the substrate 2 is finished, the control device 60 operates the clamp member 24a to release the clamp of the substrate 2 (arrow E2 shown in FIG. 16B), and then the receiving unit 24c. (The receiving unit support table 24b) is lowered with respect to the lifting table 22a (arrow D3 shown in FIG. 16C), and the substrate 2 is lowered onto the conveyor section 23 (FIG. 16C). Thereby, the holding of the substrate 2 by the substrate holding unit 24 is released (substrate holding releasing step shown in step ST8 of FIG. 11).

  When the holding of the substrate 2 is released, the control device 60 operates the horizontal moving unit 21 provided in the substrate holding and moving unit 12 to adjust the position of the conveyor unit 23 with respect to the substrate carry-out conveyor 26, and then the conveyor unit 23 and the substrate The carry-out conveyor 26 is operated in an interlocked manner, the substrate 2 on the conveyor unit 23 is transferred to the substrate carry-out conveyor 26, and the substrate 2 is directly carried out of the screen printer 1 (substrate carry-out process shown in step ST9 in FIG. 11).

  After unloading the substrate 2, the control device 60 determines whether there is another substrate 2 on which screen printing is to be performed (second determination step shown in step ST10 of FIG. 11). As a result, if there is another substrate 2 to be screen-printed, the process returns to step ST1 to carry in a new substrate 2, and if there is no other substrate 2 to be screen-printed, a series of screen printing operations. Exit.

  In the screen printing machine 1 according to the present embodiment, the paste Pst is printed on the substrate 2 according to the above procedure. When the control device 60 of the screen printing machine 1 finishes the screen printing process for several sheets of the substrate 2. Then, the lower surface of the mask 13 is cleaned using the mask cleaning device 16. Hereinafter, an operation procedure for cleaning the mask 13 by the mask cleaning device 16 will be described with reference to FIGS.

  In cleaning the mask 13, the control device 60 first moves the X-axis stage 29a to move the mask cleaning device 16 to a predetermined cleaning start position below the mask 13 (step ST11 in FIG. 17). It is determined whether or not the cleaning area 48a needs to be updated in step ST12 of FIG. This determination is made based on, for example, whether or not the number of masks 13 that have been cleaned in the current cleaning region 48a has reached a predetermined number.

  When it is determined in step ST12 that the cleaning area 48a does not need to be updated, the control device 60 starts to raise the nozzle 42 with respect to the base portion 41 (step ST13 in FIG. 17), and the nozzle 42 rises to the overhang position. By the way, the raising of the nozzle 42 is stopped (step ST14 and step ST15 in FIG. 17). During this time, the driven reel 44 is in a state in which the rotation is restricted by the brake 51, and the region S1 that is located on the driving reel 43 side with respect to the upper surface of the nozzle 42 in a state where the nozzle 42 is in the retracted position. It moves to the upper surface of the nozzle 42 and becomes a cleaning region 48a (FIG. 18A). Further, when the nozzle 42 rises to the overhanging position, the cleaning region 48a of the paper member 48 supported by the nozzle 42 is pressed against the lower surface of the mask 13 from below (FIG. 8).

  When the control device 60 raises the nozzle 42 to the overhanging position to bring the paper member 48 into contact with the lower surface of the mask 13, the control device 60 moves the X-axis stage 29 a in the Y-axis direction to move the mask cleaning device 16 relative to the mask 13. The paste Pst (the remaining residue DS of the paste Pst) adhering to the lower surface of the mask 13 is cleaned (wiped off) in the cleaning region 48a of the paper member 48 (step of FIG. 17). ST16).

  The controller 60 controls the operation of the suction mechanism 67 when cleaning the mask 13 so that air is vacuum-sucked from the air suction line 42a through the cleaning region 48a of the paper member 48. . As a result, the paste Pst adhering to the lower surface of the mask 13 is sucked out to the paper member 48 side, and the paste Pst is effectively removed.

  After cleaning the mask 13 as described above, the control device 60 lowers the nozzle 42 (arrow K1 shown in FIG. 18B) and winds up the paper member 48 by the drive-side reel 43 (FIG. 18 ( b) The arrow P1) is started (step ST17 in FIG. 17), and when the nozzle 42 reaches the storage position, the lowering of the nozzle 42 and the winding of the paper member 48 by the drive side reel 43 are stopped (FIG. 17). Step ST18 and Step ST19). As a result, the area S1 of the paper member 48 that has been the cleaning area 48a is moved to the drive reel 43 side (FIG. 18B). The winding speed of the paper member 48 when the nozzle 42 is lowered is set to a speed at which the paper member 48 does not slack.

  When the control device 60 lowers the nozzle 42 to the storage position, it moves the mask cleaning device 16 to a predetermined standby position and enters a standby state until the next mask 13 is cleaned (step ST20 in FIG. 17).

  On the other hand, when determining that the cleaning area 48a needs to be updated in step ST12, the control device 60 cancels the rotation restriction of the driven reel 44 by the brake 51 (step ST21 in FIG. 17). The nozzle 42 starts to rise (step ST22 in FIG. 17; arrow K2 shown in FIG. 19A). During the ascent of the nozzle 42, the paper member 48 is pulled by the nozzle 42, the driven reel 44 is driven to rotate (arrow Q shown in FIG. 19A), and the paper member 48 is moved from the driven reel 44. It is pulled out (arrow A shown in FIG. 19A and FIG. 10). During this time, since the drive side reel 43 remains stopped, the area S1 that has been the cleaning area 48a moves further to the drive side reel 43 side, and is an area on the side of the driven reel 44 adjacent to the area S1. S2 moves to the drive side reel 43 side rather than the nozzle 42 (FIG. 19A).

  While the control device 60 raises the nozzle 42 in a state in which the rotation restriction of the driven reel 44 by the brake 51 is released, the rotation member 46a of the paper member advance amount detection device 46 is in the direction opposite to the driven reel 44. The amount of advancement of the paper member 48 reaches a predetermined value based on the information on the amount of advancement of the paper member 48 detected by rotating in the direction (arrow B shown in FIG. 19A and FIG. 10). When this is detected, the rotation of the driven reel 44 is restricted by the brake 51 (step ST23 and step ST24 in FIG. 17), and the drawing of the paper member 48 from the driven reel 44 is stopped. Thus, during the subsequent raising of the nozzle 42 (arrow K3 shown in FIG. 19B), the paper reel 48 pulled by the nozzle 42 causes the driving reel 43 to move in the direction opposite to the winding direction of the paper member 48. The paper member 48 is pulled out from the drive-side reel 43 by being driven to rotate (arrow P2 shown in FIG. 19B).

  After restricting the rotation of the driven reel 44, the control device 60 stops the ascent of the nozzle 42 when the nozzle 42 reaches the overhanging position (step ST14 and step ST15 in FIG. 17). As a result, the area S2 on the driven reel 44 side adjacent to the area S1 that has been the cleaning area 48a previously moves to the upper surface of the nozzle 42 to become the cleaning area 48a (FIG. 19B), and the paper member The update of the cleaning area 48a of 48 is completed, and thereafter, the lower surface of the mask 13 is cleaned by the same procedure as when the cleaning area 48a is not updated (steps ST16 to ST20).

  The “predetermined value” of the advance amount of the paper member 48 is arbitrarily determined as a value that updates the cleaning area 48a when the nozzle 42 is positioned at the overhanging position by the above procedure.

  As described above, in the screen printing machine 1 according to the present embodiment, the control device 60 cancels the rotation restriction of the driven-side reel 44 by the brake 51 in a state in which the nozzle 42 is positioned at the storage position, and then uses the nozzle 42 as a base. The paper member 48 is pulled out from the driven reel 44 by being lifted with respect to the portion 41, and the paper member 48 is pulled out from the driven reel 44 based on the amount of advancement of the paper member 48 detected by the paper member advance detection device 46. When it is detected that the amount of progress of the paper member 48 has reached a predetermined value, the brake 51 restricts the rotation of the driven reel 44 and then raises the nozzle 42 to the overhanging position, so that the driving reel 43 is moved to the paper member 48. The paper member 48 is moved from the drive side reel 43 while being driven and rotated in a direction opposite to the winding direction of The new cleaning area 48a of the paper member 48 is positioned on the upper surface of the nozzle 42 (that is, the new cleaning area 48a of the paper member 48 is calculated based on the progress amount of the paper member 48 calculated by the progress amount calculation unit 46c). 48a is positioned on the upper surface of the nozzle 42) and functions as a cleaning area update operation control means.

  Further, the control device 60 adheres to the lower surface of the mask 13 by moving the base portion 41 relative to the mask 13 with the new cleaning region 48 a of the paper member 48 pressed against the lower surface of the mask 13 by the nozzle 42. It also functions as a paste wiping operation control means for wiping the paste Pst.

  Further, the control device 60 makes the mask 13 from which the paste Pst adhered to the lower surface is wiped contact the substrate 2 and slides the squeegee 14 on the mask 13 to transfer the paste Pst to the electrode 3 on the substrate 2. It also functions as a print execution control means.

  As described above, in the screen printing machine 1 according to the present embodiment, the paper member 48 is pulled out from the driven reel 44 by the operation of raising the nozzle 42 as the pressing member from the retracted position to the overhanging position, thereby cleaning the paper member 48. 48a is updated, and the driving side reel 43 is not driven during this time. Therefore, even if the rotational driving force of the driving side reel 43 by the reel driving motor 50 is small, the cleaning region 48a of the paper member 48 is updated. The mask cleaning device 16 can be downsized.

  Further, in the paper member advance detection device 46 provided in the screen printing machine 1 in the present embodiment, the rotation member 46 a provided in contact with the outer peripheral surface of the roll-shaped paper member 48 wound around the driven reel 44. Since the amount of progress of the paper member 48 drawn from the driven reel 44 is calculated according to the number of rotations, the paper is not affected by the radial dimension of the roll-shaped paper member 48 wound around the driven reel 44. The amount of progress of the member 48 can be accurately detected. Therefore, in the screen printing machine 1 provided with such a paper member advance amount detection device 46, the cleaning area 48a in the mask cleaning device 16 can be accurately updated. It is unlikely that the mask 13 will be soiled during cleaning of the mask 13, or the paper member 48 will be wasted due to the gap between the old and new cleaning regions 48a being too wide.

  In the screen printing machine 1 according to the above-described embodiment, the cleaning region 48 a of the mask cleaning device 16 is updated by calculating (detecting) the amount of progress of the paper member 48 that has been advanced by being pulled out from the driven reel 44. However, the screen printing machine 1 does not necessarily have to have the above-described configuration (particularly, when the rotational drive amount of the drive-side reel 43 by the reel drive motor 50 is sufficiently large) A configuration in which a new cleaning region 48 a of the paper member 48 is simply positioned on the upper surface of the nozzle 42 based on the progress amount of the paper member 48 detected by the paper member progress amount detection device 46 (calculated by the progress amount calculation unit 46 c). It may be. In this case, the number of rotations of the rotating member 46a rotated in response to the winding of the paper member 48 by the drive side reel 43 is detected by the paper member advance amount detection device 46, and the detected number of rotations of the rotating member 46a is detected. Based on this, it is possible to employ a configuration that calculates the amount of progress of the paper member 48 that has been advanced by being wound by the drive reel 43.

  Provided are a paper member advance amount detection device, a screen printer, a paper member advance amount detection method, and a screen printing method that can accurately detect the advance amount of a paper member that is advanced by being pulled out of or taken up by a reel. To do.

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Board | substrate 3 Electrode 13 Mask 13a Pattern hole 14 Squeegee 41 Base part 42 Nozzle (pressing member)
43 Driving reel 44 Driven reel (reel)
46 Paper member progress detection device 46a Rotating member 46b Rotational speed detection unit 46c Progression amount calculation unit 48 Paper member 48a Cleaning area 60 Control device (cleaning area update operation control means, paste wiping operation control means, screen printing execution control means)
Pst paste

Claims (4)

A rotating member provided in contact with the outer peripheral surface of a roll-shaped paper member wound around a reel;
A rotational speed detection unit for detecting the rotational speed of the rotating member rotated in accordance with drawing of the paper member from the reel or winding of the paper member by the reel;
A progress amount calculation unit that calculates a progress amount of the paper member that is advanced by being pulled out of the reel or wound by the reel based on the rotation number of the rotation member detected by the rotation number detection unit; A paper member advancing amount detecting device. A mask having a pattern hole corresponding to the electrode of the substrate, the mask being in contact with the substrate so that the electrode of the substrate and the pattern hole are matched,
A squeegee that slides on the mask in contact with the substrate and scrapes the paste supplied on the mask onto the mask to transfer the paste to the electrode of the substrate through the pattern hole of the mask;
A base that moves relative to the mask in parallel below the mask;
A pressing member provided in the base portion;
A driving reel and a driven reel provided in the base,
A paper member that is spanned between the driving side reel and the driven side reel and the cleaning region located on the upper surface of the pressing member is pressed against the lower surface of the mask by the pressing member;
A rotating member provided in contact with the outer peripheral surface of a roll-shaped paper member wound around a driven-side reel or a driving-side reel;
A rotational speed detection unit for detecting the rotational speed of the rotating member rotated in accordance with drawing of the paper member from the driven reel or winding of the paper member by the driving reel;
A progress amount calculation unit that calculates a progress amount of the paper member that has been advanced by being pulled out of the driven reel or wound by the drive side reel, based on the rotation number of the rotating member detected by the rotation number detection unit;
A cleaning region update operation control means for positioning a new cleaning region of the paper member on the upper surface of the pressing member based on the progress amount of the paper member calculated by the progress amount calculating unit;
Paste wiping operation control means for wiping away the paste adhering to the lower surface of the mask by moving the base portion relative to the mask in a state where the new cleaning area of the paper member is pressed against the lower surface of the mask by the pressing member;
Screen printing execution control means for transferring a paste to an electrode of a substrate by bringing the mask from which the paste adhered to the lower surface has been wiped into contact with the substrate and sliding a squeegee on the mask Printer. A step of detecting the number of rotations of a rotating member provided in contact with the outer peripheral surface of a roll-shaped paper member wound around a reel, in response to the withdrawal of the paper member from the reel or the winding of the paper member by the reel. When,
And a step of calculating a progress amount of the paper member that has been advanced by being pulled out of the reel or wound up by the reel based on the detected number of rotations of the rotary member. A mask that has a pattern hole corresponding to the electrode of the substrate, and that is in contact with the substrate so that the electrode of the substrate matches the pattern hole, and a paste that slides on the mask that is in contact with the substrate and is supplied onto the mask Squeegee on the mask, the squeegee for transferring the paste to the electrode of the substrate through the pattern hole of the mask, the base portion that moves relative to the mask in parallel below the mask, and the base portion. The pressing member, the driving-side reel and the driven-side reel provided in the base portion, and the cleaning area that is spanned between the driving-side reel and the driven-side reel and is located on the upper surface of the pressing member are masked by the pressing member. A screen printing method by a screen printing machine comprising a paper member pressed against the lower surface of
A rotating member provided in contact with the outer peripheral surface of a roll-shaped paper member wound around a driven reel or a driving reel is used to pull out the paper member from the driven reel or to wind the paper member by the driving reel. Detecting the number of rotations correspondingly,
A step of calculating a progress amount of the paper member that has been advanced by being pulled out of the driven-side reel or wound up by the driving-side reel, based on the detected number of rotations of the rotating member;
Based on the calculated amount of progress of the paper member, a step of positioning a new cleaning region of the paper member on the upper surface of the pressing member;
A process of wiping off the paste adhered to the lower surface of the mask by moving the base portion relative to the mask in a state where the new cleaning area of the paper member is pressed against the lower surface of the mask by the pressing member;
And a step of bringing the mask onto which the paste adhering to the lower surface is wiped into contact with the substrate and sliding the squeegee on the mask to transfer the paste to the electrode of the substrate.

Images