JP5146473B2 - Screen printing machine and screen printing method - Google Patents

Description

  The present invention relates to a screen printing machine and a screen printing method for transferring a paste to a substrate via a mask plate.

  A screen printing machine positions a substrate by a substrate positioning unit composed of a belt conveyor mechanism or the like, and supports the positioned substrate from below by a lower receiving unit to execute a screen printing operation (for example, patent document). 1). In such a screen printing machine, in order to prevent a situation where another substrate enters the substrate positioning portion from the upstream side in the substrate transport direction when performing a screen printing operation on the positioned substrate. When the positioned substrate is in operation, the sensor detects a substrate to be entered from the substrate carry-in portion provided upstream of the substrate positioning portion and stops the operation of the substrate carry-in portion. Yes.

JP 2007-160710 A

  However, as described above, if an attempt is made to prevent the substrate from entering the substrate positioning unit that is performing work by detecting the substrate by the sensor, the operation of the screen printing machine is urgently stopped when a sensor failure or the like occurs. There has been a problem that the productivity of the substrate may be significantly reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a screen printing machine and a screen printing method capable of reliably preventing the substrate from entering the substrate positioning unit during execution of work.

  The screen printer according to claim 1 is moved up and down with respect to the base unit together with a lifting unit that moves up and down with respect to the base unit, a lower receiving unit that moves up and down with respect to the lifting unit, and the lifting unit descends with respect to the base unit. A substrate lifting unit having a substrate positioning portion for carrying and positioning the substrate when the lower receiving portion is positioned at a lower position relative to the lifting portion, and a pattern hole corresponding to the arrangement of the electrodes on the substrate With the mask plate on which the substrate is formed and the elevating part positioned at the lowered position with respect to the base part, the lower receiving part is raised to the raised position with respect to the elevating part, and the substrate positioned by the substrate positioning part is supported by the lower receiving part. After that, the lifting / lowering unit is moved up to the raised position with respect to the base portion, and the substrate lifting unit operating hand that brings the substrate supported by the lower receiving portion into contact with the mask plate from below. A squeegee that slides on the mask plate in contact with the substrate and scrapes the paste supplied on the mask plate on the mask plate to transfer the paste to the substrate through the pattern hole of the mask plate; In the state where the lifting part is located at the lowered position with respect to the base part and the lower receiving part is located at the lowered position with respect to the lifting part, the substrate is brought into contact with the substrate entering the substrate positioning part from the upstream side in the substrate transport direction. A substrate that enters the substrate positioning unit from the upstream side in the substrate transport direction in a state where the substrate is located at a position that is not in contact, the lifting unit is positioned at the rising position with respect to the base unit, and the lower receiving unit is positioned at the rising position with respect to the lifting unit. And a first substrate entry restricting member located at the abutting position.

  A screen printing machine according to claim 2 is the screen printing machine according to claim 1, wherein the screen printing machine is provided in the lower receiving portion, the lifting portion is located at a lowered position with respect to the base portion, and the lower receiving portion is the lifting portion. In the state where it is in the lowered position relative to the substrate, it is located at a position where it does not contact the substrate entering the substrate positioning portion from the upstream side in the substrate transport direction, the lifting portion is located at the lowered position with respect to the base portion, and the lower receiving portion is raised or lowered In a state of being positioned at the ascending position with respect to the portion, a second substrate entry regulating member is provided which is located at a position where the substrate enters the substrate positioning portion from the upstream side in the substrate transport direction.

  According to a third aspect of the present invention, there is provided the screen printing method, wherein the elevating unit is moved up and down relative to the base unit, the lower receiving unit is moved up and down relative to the elevating unit, and the elevating unit is moved up and down relative to the base unit A substrate lifting unit having a substrate positioning portion for carrying and positioning the substrate when the lower receiving portion is positioned at a lower position relative to the lifting portion, and a pattern hole corresponding to the arrangement of the electrodes on the substrate With the mask plate on which the substrate is formed and the elevating part positioned at the lowered position with respect to the base part, the lower receiving part is raised to the raised position with respect to the elevating part, and the substrate positioned by the substrate positioning part is supported by the lower receiving part. After that, the lifting / lowering unit is actuated by raising the lifting / lowering part to the raised position with respect to the base part and bringing the substrate supported by the lower receiving part into contact with the mask plate from below And a squeegee that slides on the mask plate in contact with the substrate and scrapes the paste supplied on the mask plate on the mask plate to transfer the paste to the substrate through the pattern holes of the mask plate. A screen printing method of a screen printing machine provided with a substrate positioning unit carrying a substrate in a state where the elevating unit is positioned at a lowered position with respect to the base unit and the lower receiving unit is positioned at a lowered position with respect to the elevating unit. A step of positioning, a step of supporting the substrate positioned by the substrate positioning unit from the lower position by raising the lower receiving portion from the lowered position with respect to the lifting portion, and a step of raising the lifting portion to the raised position with respect to the base portion. The substrate supported by the receiving portion is brought into contact with the lower side of the mask plate, and the second plate provided in the substrate positioning portion. The step of positioning the substrate entry restricting member at a position in contact with the substrate entering the substrate positioning portion from the upstream side in the substrate transport direction, and sliding the squeegee on the mask plate in contact with the substrate, And transferring the paste to the substrate through the pattern holes of the mask plate by scraping the supplied paste on the mask plate.

  The screen printing method according to claim 4 is the screen printing method according to claim 3, wherein the substrate positioned by the substrate positioning portion is moved from below by raising the lower receiving portion from the lowered position relative to the lifting portion to the raised position. When the supporting step is executed, the second substrate entry restricting member provided in the lower receiving portion is positioned at a position that comes into contact with the substrate entering the substrate positioning portion from the upstream side in the substrate transport direction.

  In the present invention, when the elevating part is raised from the lowered position with respect to the base part to the elevated position, and the substrate supported by the lower receiving part is brought into contact with the lower part of the mask plate, the substrate positioning part that moves up and down relative to the base part together with the elevating part The first board entry restricting member provided on the board is positioned at a position in contact with the board entering the board positioning section from the upstream side in the substrate transport direction. It is possible to reliably prevent the substrate from entering.

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 BRIEF DESCRIPTION OF THE DRAWINGS (a) Perspective view (b) Front view of substrate positioning conveyor provided in screen printing machine in one embodiment of the present invention The top view of the mask plate with which the screen printer in one embodiment of the present invention is provided (A) (b) The front view of the board | substrate positioning conveyor with which the screen printer in one embodiment of this invention is provided. (A) (b) The front view of the board | substrate positioning conveyor 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 flowchart which shows the procedure of the screen printing operation which the screen printer in one embodiment of this invention performs BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view (b) Perspective view of substrate positioning conveyor provided in screen printer in one embodiment of the present invention BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view (b) Perspective view of substrate positioning conveyor provided in screen printer in one embodiment of the present invention BRIEF DESCRIPTION OF THE DRAWINGS (a) Side view (b) Perspective view of substrate positioning conveyor provided in screen printing machine in one embodiment of the present invention BRIEF DESCRIPTION OF THE DRAWINGS (a) Side view (b) Perspective view of substrate positioning conveyor provided in screen printing machine in one embodiment of the present invention BRIEF DESCRIPTION OF THE DRAWINGS (a) Side view (b) Perspective view of substrate positioning conveyor provided in screen printing machine in one embodiment of the present invention BRIEF DESCRIPTION OF THE DRAWINGS (a) Side view (b) Perspective view of substrate positioning conveyor provided in screen printing machine in one embodiment of the present invention (A) (b) (c) Side view of the board | substrate positioning conveyor with which the screen printer in one embodiment of this invention is provided. (A) (b) (c) Side view of the board | substrate positioning conveyor 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. The surface of the substrate 2 is conveyed while the substrate 2 is conveyed. A paste such as a solder paste or a conductive paste is screen-printed on the electrode 3 provided on the substrate 3 and carried out to a downstream electronic component mounting machine (not shown) or the like. 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). ), The vertical direction is the Z-axis direction (the vertical direction in FIG. 2), the Y-axis direction is the front-rear direction of the screen printer 1, and the X-axis direction is the horizontal direction of the screen printer 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 elevating unit 12 provided on a base 11, a mask plate 13 provided above the substrate elevating unit 12, and a pair of A squeegee 14 and a camera unit 15 are provided.

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

  The horizontal moving unit 21 rotates around the Z axis with respect to the Y table 21a that moves in the Y axis direction with respect to the base 11, the X table 21b that moves in the X axis direction with respect to the Y table 21a, and the X table 21b. A θ table 21c, a base table 21d (base portion) fixed to the upper surface of the θ table 21c, and a plurality of elevating table guides 21e extending upward from the upper surface of the base table 21d.

  The elevating unit 22 is guided by a plurality of elevating table guides 21e of the horizontal moving unit 21 and is elevating from the upper surface of the elevating table 22a (elevating unit) and elevating the table 22a. It comprises a lower receiving unit lifting guide 22b.

  The substrate positioning conveyor 23 includes a pair of conveyor mechanisms 23a that move up and down with respect to the base table 21d together with the lifting table 22a. As shown in FIGS. 4 (a) and 4 (b), each conveyor mechanism 23a is provided extending in the X-axis direction, and a belt conveyor attachment member 31 attached to the upper end of the receiving unit elevating guide 22b, and a belt conveyor. The belt conveyor 32 is attached to the attachment member 31 and extends in the X-axis direction. The pair of conveyor mechanisms 23a operate synchronously (the belt conveyor 32) so that the substrate 2 is conveyed and positioned in the X-axis direction. Is made.

  2 and 3, the substrate holding unit 24 is a pair of clamp members 24a provided on the upper portions of the pair of belt conveyor attachment members 31 included in the substrate positioning conveyor 23 so as to be movable in the Y-axis direction (see also FIG. 1). In the lower part of the substrate positioning conveyor 23, 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 is provided on the upper surface of the lower receiving unit support table 24b. The lower receiving unit 24c moves up and down with respect to the lifting table 22a together with the lower receiving unit support table 24b, thereby supporting the substrate 2 positioned by the substrate positioning conveyor 23 from below. The pair of clamp members 24a is positioned at the work position by the substrate positioning conveyor 23, and clamps both sides in the Y-axis direction of the substrate 2 whose lower surface is supported by the lower receiving unit 24c from the outside of the substrate 2.

  1 and 2, the positions of both sides in the X-axis direction (upstream side and downstream side in the conveyance direction of the substrate 2) of the substrate positioning conveyor 23 constituting the substrate lifting unit 12 are outside the screen printing machine 1 (see FIG. 1). 1 and the substrate loading conveyor 25 that transports (loads) the substrate 2 loaded from the left side of the sheet of FIG. 2 to the substrate positioning conveyor 23 and the substrate 2 that is transferred from the substrate positioning conveyor 23 to the screen printing machine 1. A substrate carry-out conveyor 26 for carrying (carrying out) the outside (right side of the drawing in FIGS. 1 and 2) is provided. The substrate carry-in conveyor 25 and the substrate carry-out conveyor 26 are each composed of a pair of conveyor mechanisms (indicated by reference numerals 25a and 26a in FIG. 1) like the substrate positioning conveyor 23.

  1 and 5, the mask plate 13 is supported on four sides by a frame member 13w having a rectangular shape in plan view, and a plurality of electrodes 3 on the substrate 2 are disposed in a rectangular region surrounded by the frame member 13w. A large number of pattern holes ph provided corresponding to (that is, according to the arrangement of the electrodes 3) are formed.

  In FIG. 1, two sets of substrate side alignment marks mk are provided at diagonal positions of the substrate 2. On the other hand, in FIG. 5, the mask plate 13 is provided with a pair of mask side alignment marks MK arranged corresponding to the substrate side alignment marks mk.

  The mask plate 13 is provided with a pair of mask support rails 27 provided so that the operator OP holds both ends of the mask plate 13 with both hands and extends in the Y-axis direction from the front of the screen printing machine 1 to above the substrate lifting unit 12. (FIG. 1 and FIG. 5), and by pushing backward until the leading end of the frame member 13w comes into contact with a stopper 27a (FIGS. 1 and 5) provided on the mask support rail 27, a predetermined Installed in position.

  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 above-described pair of 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.

  4 (a) and 4 (b), the upstream side in the transport direction of the substrate 2 (the left side in FIG. 4) among the both ends in the X-axis direction of each belt conveyor attachment member 31 constituting the substrate positioning conveyor 23. A first board entry restricting member 41 is provided at the end of the first board. Each first board entry restriction member 41 has a horizontal extension 41a extending upstream in the conveyance direction of the board 2 and a lower extension 41b extending downward from the end of the horizontal extension 41a. The downward extending portion 41b is located in a vertical plane (in the YZ plane) orthogonal to the X axis between the substrate carry-in conveyor 25 and the substrate positioning conveyor 23.

  4A and 4B, the lower receiving unit 24c includes a block portion 42 attached to the upper surface of the lower receiving unit support table 24b and a plurality of pins provided extending upward from the upper surface of the block portion 42. When the substrate 2 is supported, the upper end portions of the plurality of pin-shaped members 43 are brought into contact with the lower surface of the substrate 2.

  Of both ends of the block portion 42 of the lower receiving unit 24c in the X-axis direction (the transport direction of the substrate 2), the second substrate is located at the upstream end in the transport direction of the substrate 2 (left side in FIG. 4). An entry restricting member 44 is provided. The second board entry restricting member 44 has a horizontal extension 44a that extends upstream in the transport direction of the board 2 and an upper extension 44b that extends upward from the end of the horizontal extension 44a. It has an L-shape, and the upward extending portion 44b is located in a vertical plane (YZ plane) orthogonal to the X axis between the substrate carry-in conveyor 25 and the substrate positioning conveyor 23.

  4 (b), 6 (a), 6 (b) and 7 (a), 7 (b), the elevating table 22a is in a lowered position P1 and a raised position with respect to the base table 21d (based on the base table 21d). The lower receiving unit 24c can move up and down between the lowered position Q1 and the raised position Q2 (based on the raised table 22a) with respect to the raised table 22a. 4 (b), 6 (a), 6 (b) and 7 (a), 7 (b), the lifting range of the lifting table 22a is indicated by a range R1, and the lifting range of the lower receiving unit 24c is indicated by a range R2. Show.

  FIG. 6A shows a state in which the lifting table 22a is located at the lowered position P1 with respect to the base table 21d and the lower receiving unit 24c is located at the lowered position Q1 with respect to the lifting table 22a. Shows a state in which the lifting table 22a is located at the lowered position P1 with respect to the base table 21d and the lower receiving unit 24c is located at the raised position Q2 with respect to the lifting table 22a.

  FIG. 7A shows a state in which the lower receiving unit 24c is located at the raised position Q2 with respect to the lifting table 22a and the lifting table 22a is located between the lowered position P1 and the raised position P2 with respect to the base table 21d. FIG. 7B shows a state in which the lower receiving unit 24c is located at the raised position Q2 with respect to the lifting table 22a, and the lifting table 22a is located at the raised position P2 with respect to the base table 21d.

  In the screen printing machine 1 according to the present embodiment, in the operation procedure, the lower receiving unit 24c moves up and down only when the lifting table 22a is located at the lowered position P1 with respect to the base table 21d. Therefore, when the elevating table 22a moves up and down with respect to the base table 21d, the lower receiving unit 24c is always in a state of being in the ascending position Q2 with respect to the elevating table 22a.

  As shown in FIGS. 6A and 6B, the first board entry restricting member 41 determines whether the lower receiving unit 24c is located at the lowered position Q1 or the raised position Q2 with respect to the lifting table 22a. Regardless, in the state where the lift table 22a is located at the lowered position P1 with respect to the base table 21d, the downward extending portion 41b is moved from the substrate carry-in conveyor 25 (that is, from the upstream side in the transfer direction of the substrate 2). As shown in FIG. 7 (b), the lower receiving unit 24c is positioned at the rising position Q2 with respect to the lifting table 22a, and the lifting table is located. In a state where 22a is located at the ascending position P2 with respect to the base table 21d, the downward extending portion 41b is moved from the substrate carry-in conveyor 25 to the substrate positioning connector. It is adapted to position forward in the traveling direction of the substrate 2 which enters the bare 23.

  In addition, as shown in FIG. 6A, the second board entry restricting member 44 is configured such that the elevating table 22a is positioned at the lowered position P1 with respect to the base table 21d, and the lower receiving unit 24c is at the lowered position Q1 with respect to the elevating table 22a. 6b, the upper extension 44b is positioned below the transfer surface S of the substrate 2 entering the substrate positioning conveyor 23 from the substrate carry-in conveyor 25, as shown in FIG. 6B. In addition, when the lifting table 22a is located at the lowered position P1 with respect to the base table 21d and the lower receiving unit 24c is located at the raised position Q2 with respect to the lifting table 22a, the upper extending portion 44b is moved from the substrate carry-in conveyor 25 to the substrate positioning conveyor. 23 is located in front of the substrate 2 in the direction of travel.

  In the state where the lifting table 22a is located at the lowered position P1 with respect to the base table 21d and the lower receiving unit 24c is located at the lowered position Q1 with respect to the lifting table 22a (FIG. 6A), the first board entry restricting member 41 and Since both of the second board entry restriction members 44 are located at positions where they do not come into contact with the board 2 entering the board positioning conveyor 23 from the board carry-in conveyor 25, the board 2 enters the board positioning conveyor 23 from the board carry-in conveyor 25. The substrate positioning conveyor 23 can carry in and position the substrate 2. (FIG. 4 (b) → FIG. 6 (a)).

  When the lower receiving unit 24c rises from the lowered position Q1 to the raised position Q2 with respect to the lifting table 22a (FIG. 6 (a) → FIG. 6 (b)), the substrate 2 entering the substrate positioning conveyor 23 from the substrate carry-in conveyor 25 during this period Since the second substrate entry restricting member 44 is located at the contact position, entry of the substrate 2 from the substrate carry-in conveyor 25 to the substrate positioning conveyor 23 is prevented.

  Further, after the lower receiving unit 24c is raised from the lowered position Q1 to the raised position Q2 with respect to the lift table 22a (FIG. 6B), the lift table 22a is lifted from the lowered position P1 with respect to the base table 21d to the raised position P2 (FIG. 6). 6 (b) → FIG. 7 (a) → FIG. 7 (b)), during this time, the second substrate entry restriction member is initially located at a position where it abuts on the substrate 2 entering the substrate positioning conveyor 23 from the substrate carry-in conveyor 25. 44 is located (FIG. 6B), then the first substrate entry restriction member 41 is located in addition to the second substrate entry restriction member 44 (FIG. 7A), and the lifting table 22a is the base table. In the state where the first substrate entry restriction member 41 is in contact with the substrate 2 in the state where it is in the raised position P2 with respect to 21d (FIG. 7B), the substrate is loaded from the substrate carry-in conveyor 25 to the substrate. Entry of the substrate 2 to-decided Me conveyor 23 is prevented.

  In this screen printing machine 1, the operations of the substrate carry-in conveyor 25, the substrate positioning conveyor 23 and the substrate carry-out conveyor 26 as a substrate carrying path for carrying the substrate 2 are controlled by an actuator not shown by the control device 50 (FIG. 8). The substrate transport path actuating mechanism 51 (FIG. 8) is controlled so as to clamp the substrate 2 by the clamp member 24a. The clamp device actuating mechanism 52 (FIG. 8) is configured by the controller 50 including an actuator (not shown). This is done by performing the operation control.

  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 50 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 lifting unit operation mechanism 53 (FIG. 8) including an actuator including Mx (see FIGS. 2 and 3).

  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 50 controls the operation of the camera unit moving mechanism 54 (FIG. 8) including an actuator (not shown).

  The operation control of the squeegee base 40 for reciprocating the pair of squeegees 14 in the Y-axis direction is performed by the control device 50 controlling a squeegee moving mechanism 55 (FIG. 8) including an actuator (not shown). Further, the raising / lowering operation of each squeegee 14 with respect to the squeegee base 40 is performed when the control device 50 controls the operation of the squeegee raising / lowering cylinder 56 (FIG. 2, FIG. 3 and FIG. 8) 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 50 to image the substrate side alignment mark mk of the substrate 2 positioned at the work position by the substrate positioning conveyor 23 provided in the substrate lifting unit 12. The second camera 15b is controlled by the control device 50 to image the mask side alignment mark MK provided on the mask plate 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 50 (FIG. 8).

  Next, the operation of the screen printer 1 will be described with reference to the flowchart of FIG. 9 and the operation explanatory diagrams of FIGS. The control device 50 of the screen printing machine 1 places the lifting table 22a at the lowered position P1 with respect to the base table 21d and the lower receiving unit 24c at the lowered position Q1 with respect to the lifting table 22a (FIG. 4B). 10 (a) and 10 (b)), the substrate 2 is 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 by a detection means (not shown). Is detected, the substrate carrying conveyor 25 and the substrate positioning conveyor 23 are operated in conjunction to carry the substrate 2 into the screen printer 1 (arrow A shown in FIGS. 10A and 10B), and further When the detection means (not shown) detects that the substrate 2 to be carried by the substrate positioning conveyor 23 has reached a predetermined work position, the substrate positioning conveyor 2 The actuation is stopped to position the substrate 2 (FIG. 6 (a) and FIG. 11 (a), (b). Step ST1 of the substrate positioning step. Figure 9).

  After positioning the substrate 2 to the work position, the control device 50 moves the lower receiving unit 24c (lower receiving unit support table 24b) to the lifting table while keeping the lifting table 22a at the lowered position P1 with respect to the base table 21d. 22a (arrow B1 shown in FIGS. 12A and 12B), and when the pin-like member 43 of the lower receiving unit 24c comes into contact with the lower surface of the substrate 2, the lowering of the lower receiving unit 24c is stopped. (FIGS. 12A and 12B). Then, the clamp member 24a is operated (arrow C1 shown in FIGS. 13A and 13B), and both side portions of the substrate 2 on the substrate positioning conveyor 23 are clamped by the pair of clamp members 24a (FIG. 13A ), (B)).

  After the substrate 2 is clamped by the pair of clamp members 24a, the control device 50 further raises the lower receiving unit 24c relative to the lifting table 22a while keeping the lifting table 22a at the lowered position P1 with respect to the base table 21d. The substrate 2 is pushed up by the receiving unit 24c (FIGS. 14A and 14B, arrow B2 shown in these drawings). 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 belt conveyors 32 of the substrate positioning conveyor 23), and the lower receiving unit 24c is moved up and down. When the upper surface of the substrate 2 is substantially at the same height as the upper surfaces of the clamp members 24a at the rising position Q2 with respect to 22a, 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 (FIGS. 14A and 14B, substrate holding step, step ST2 in FIG. 9).

  At the time when the substrate holding process is completed, the lifting table 22a is positioned at the lowered position P1 with respect to the base table 21d, and the lower receiving unit 24c is positioned at the rising position Q2 with respect to the lifting table 22a. The second board entry restricting member 44 is located at a position where it comes into contact with the board 2 entering the board positioning conveyor 23 (FIG. 6B). For this reason, in addition to executing the substrate holding process, after the substrate holding process is completed, the lifting table 22a is positioned at the lowered position P1 with respect to the base table 21d, and the lower receiving unit 24c is positioned at the rising position Q2 with respect to the lifting table 22a. During this state, it is possible to prevent the substrate 2 from entering the substrate positioning conveyor 23 from the substrate carry-in conveyor 25 by mistake.

  After holding the substrate 2 by the substrate holding part 24 as described above, the control device 50 controls the operation of the camera unit moving mechanism 54 (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 alignment mark mk provided on the substrate 2 to cause the first camera 15a to image the substrate-side alignment mark mk, The second camera 15b is positioned directly below the mask side alignment mark MK provided on the mask plate 13, and the second camera 15b is caused to image the mask side alignment mark MK. Then, the control device 50 grasps the position of the substrate 2 from the obtained image data of the substrate side alignment mark mk, and grasps the position of the mask plate 13 from the obtained image data of the mask side alignment mark MK. Then, the operation of the horizontal moving unit 21 included in the substrate lifting / lowering unit 12 is controlled to move the substrate holding unit 24 (and thus the substrate 2) in the horizontal plane direction, so that the substrate side alignment mark mk and the mask side alignment mark MK are The substrate 2 and the mask plate 13 are aligned in the horizontal plane direction so as to face each other vertically (alignment step; step ST3 in FIG. 9).

  When the alignment of the substrate 2 and the mask plate 13 in the horizontal plane direction is finished, the control device 50 raises the lifting table 22a with respect to the base table 21d (the arrow D1 shown in FIGS. 15A and 15B). ), The upper surface, which is the printing surface, of the substrate 2 is brought into contact with the mask plate 13 from below (FIGS. 15A and 15B. Contact process, step ST4 in FIG. 9). As a result, the pattern hole ph of the mask plate 13 and the electrode 3 on the substrate 2 are aligned in the vertical direction.

  When this contact process is completed, the receiving unit 24c is positioned at the lift position Q2 with respect to the lift table 22a, and the lift table 22a is positioned at the lift position P2 with respect to the base table 21d. The first board entry restriction member 41 thus formed is located at a position where it abuts on the board 2 entering the board positioning conveyor 23 from the upstream side in the transport direction of the board 2 (FIG. 7B). For this reason, in addition to the execution of the contact process, after the contact process is completed, the lower receiving unit 24c is positioned at the lift position Q2 with respect to the lift table 22a, and the lift table 22a is positioned at the lift position P2 with respect to the base table 21d. During this time, it is possible to prevent the substrate 2 from entering the substrate position transport unit 23 from the substrate carry-in conveyor 25 by mistake.

  In the above-described substrate holding step and contact step, the lower receiving unit 24c is raised to the raised position Q2 with respect to the lifting table 22a with the lifting table 22a positioned at the lowered position P1 with respect to the base table 21d. After the positioned substrate 2 is supported by the lower receiving unit 24c, the lifting table 22a is raised to the rising position P2 with respect to the base table 21d, and the substrate 2 supported by the lower receiving unit 24c is brought into contact with the mask plate 13 from below. The operation to be performed is performed by the substrate lifting unit operating mechanism 53 as the substrate lifting unit operating means whose operation is controlled by the control device 50.

  When the control device 50 brings the substrate 2 into contact with the mask plate 13, the operation of the screen printing machine 1 is temporarily interrupted, and then the operator OP is prompted to supply the paste Pst via an image display by a display device (not shown). . When 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 plate 13, and determines that the paste Pst should be supplied, The paste Pst is supplied onto the mask plate 13 by using a separately prepared paste supply syringe 60 (FIG. 16A). 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.

  After step ST4, the control device 50 determines whether or not the operation resume button has been operated (determination step; step ST5 in FIG. 9), and if it is determined that the operation resume button has been operated, the screen The operation interruption of the printing press 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 holes ph of the mask plate 13, whereby the paste Pst is applied to the substrate 2. Is transferred onto the electrode 3 (transfer process; step ST6 in FIG. 9).

  In this way, in this embodiment, the squeegee 14 is a working device that performs screen printing work as work for mounting electronic components on the board 2 supported by the receiving unit 24c.

  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. 16 and FIG. 17) is lowered and its lower edge is brought into contact with the upper surface of the mask plate 13. Thereafter, the squeegee base 40 is moved rearward in the Y-axis direction, and the front squeegee 14 is slid on the mask plate 13 to scrape the paste Pst to the upper surface region of the rear clamping member 24a (FIG. 16 ( b) Arrow E1) shown in the figure. 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 raised and separated from the mask plate 13, and the rear squeegee 14 (see FIG. 16 and FIG. 17, the squeegee 14) on the right side of the paper surface is lowered and its lower edge is brought into contact with the upper surface of the mask plate 13. Then, by moving the squeegee base 40 in the direction opposite to the arrow E1 and sliding the rear squeegee 14 on the mask plate 13, the paste Pst is scraped to the upper surface region of the front clamp member 24a (FIG. 16). (C) Arrow E2 shown in the figure). As a result, the paste Pst is transferred onto the electrode 3 of the substrate 2 through the pattern hole ph of the mask plate 13.

  After transferring the paste Pst onto the electrode 3 of the substrate 2, the control device 50 lowers the elevating table 22a with respect to the base table 21d (arrow D2 shown in FIG. 17A) and moves the mask plate 13 to the substrate 2. (Fig. 17 (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, step ST7 in FIG. 9).

  When the printing of the paste Pst on the substrate 2 is finished, the control device 50 operates the clamp member 24a to release the clamp of the substrate 2 (arrow C2 shown in FIG. 17B), and then the receiving unit 24c. (The receiving unit support table 24b) is lowered with respect to the lifting table 22a (arrow B3 shown in FIG. 17C), and the substrate 2 is lowered onto the substrate positioning conveyor 23 (FIG. 17C). Thereby, the holding of the substrate 2 by the substrate holding unit 24 is released (substrate holding releasing step; step ST8 in FIG. 9).

  When the holding of the substrate 2 is released, the control device 50 operates the horizontal moving unit 21 included in the substrate lifting unit 12 to adjust the position of the substrate positioning conveyor 23 with respect to the substrate carry-out conveyor 26, and The substrate carry-out conveyor 26 is operated in an interlocked manner, the substrate 2 on the substrate positioning conveyor 23 is transferred to the substrate carry-out conveyor 26, and the substrate 2 is directly carried out of the screen printing machine 1 (substrate carry-out process, step ST9 in FIG. 9).

  When the control device 50 carries out the substrate 2, the control device 50 determines whether there is another substrate 2 on which screen printing is to be performed (second determination step, step ST10 in FIG. 9). As a result, if there is another substrate 2 to be screen-printed, the process returns to step ST1 to carry in and position a new substrate 2, and if there is no other substrate 2 to be screen-printed, a series of screens. End the printing operation.

  As described above, in the screen printing machine 1 according to the present embodiment, the lift table 22a is located at the lowered position P1 with respect to the base table 21d, and the lower receiving unit 24c is located at the lowered position Q1 with respect to the lift table 22a. It is located at a position where it does not come into contact with the substrate 2 entering the substrate positioning conveyor 23 from the upstream side in the conveyance direction of the substrate 2, the lifting table 22a is positioned at the rising position P2 with respect to the base table 21d, and the lower receiving unit 24c is the lifting table. The substrate positioning conveyor 23 is provided with a first substrate entry regulating member 41 located at a position in contact with the substrate 2 entering the substrate positioning conveyor 23 from the upstream side in the conveyance direction of the substrate 2 in a state where the substrate positioning conveyor 23 is in the raised position Q2. It has become.

  Further, the screen printing method in the present embodiment is the screen printing method of the screen printing machine 1, in which the lifting table 22a is positioned at the lowered position P1 with respect to the base table 21d, and the lower receiving unit 24c is lowered with respect to the lifting table 22a. In the state where the substrate 2 is carried by the substrate positioning conveyor 23 in the state where the substrate is positioned at the position Q1 (substrate positioning step), the lower unit 24c is moved from the lowered position Q1 to the raised position Q2 with respect to the lifting table 22a. The step of supporting the substrate 2 positioned by the substrate positioning conveyor 23 from below (substrate holding step), the lifting table 22a is lifted to the rising position P2 with respect to the base table 21d, and the substrate 2 supported by the lower receiving unit 24c is masked 13 Touched from below And a step of positioning the first substrate entry regulating member 41 provided on the substrate positioning conveyor 23 at a position where it abuts on the substrate 2 entering the substrate positioning conveyor 23 from the upstream side in the conveyance direction of the substrate 2 (contacting step). The squeegee 14 is slid on the mask plate 13 with which the substrate 2 is in contact, and the paste Pst supplied on the mask plate 13 is scraped on the mask plate 13, thereby passing through the pattern holes ph of the mask plate 13. This includes a step of transferring the paste Pst to the substrate 2 (transfer step).

  Thus, in the screen printer 1 (screen printing method) according to the present embodiment, the lifting table 22a is lifted from the lowered position P1 to the raised position P2 with respect to the base table 21d, and the substrate 2 supported by the lower receiving unit 24c is masked. When contacting from the lower side of the plate 13, the first substrate entry regulating member 41 provided on the substrate positioning conveyor 23 that moves up and down with respect to the base table 21 d together with the lifting table 22 a is moved from the upstream side in the transport direction of the substrate 2 to the substrate. Since it is made to position in the position which contact | abuts the board | substrate 2 which approachs the positioning conveyor 23, the approach of the board | substrate 2 to the board | substrate positioning conveyor 23 in operation | work execution can be prevented reliably.

  Further, the screen printing machine 1 according to the present embodiment transports the substrate 2 in a state where the lifting table 22a is positioned at the lowered position P1 with respect to the base table 21d and the lower receiving unit 24c is positioned at the lowered position Q1 with respect to the lifting table 22a. Is located at a position where it does not come into contact with the substrate 2 entering the substrate positioning conveyor 23 from the upstream side in the direction, the lifting table 22a is positioned at the lowered position P1 with respect to the base table 21d, and the lower receiving unit 24c is at the rising position with respect to the lifting table 22a In the state of being positioned at Q2, the second receiving unit 24c is provided in the lower receiving unit 24c so as to be positioned in contact with the substrate 2 entering the substrate positioning conveyor 23 from the upstream side in the conveyance direction of the substrate 2. In the screen printing method according to the present embodiment, the substrate protection is performed. When the process is executed, the second substrate entry restricting member 44 provided in the receiving unit 24c is positioned at a position where it abuts on the substrate 2 entering the substrate positioning conveyor 23 from the upstream side in the conveyance direction of the substrate 2. Therefore, it is possible to prevent the board 2 from entering the board positioning conveyor 23 even after the board 2 is positioned by the board positioning conveyor 23 until the board 2 is supported by the receiving unit 24c. .

  Although the embodiment of the present invention has been described so far, the present invention is not limited to the above. For example, in the above-described embodiment, the first substrate entry restriction member and the second substrate entry restriction member are members each having an inverted L shape or L shape, but the shapes thereof are arbitrary. .

  Provided is a screen printing machine and a screen printing method capable of reliably preventing a substrate from entering a substrate positioning unit during work execution.

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Board | substrate 3 Electrode 12 Board | substrate lifting / lowering unit 13 Mask plate 14 Squeegee 21d Base table (base part)
22a Elevating table (elevating part)
23 Substrate positioning conveyor (substrate positioning unit)
24c Lower receiving unit (lower receiving part)
41 First substrate entry restriction member 44 Second substrate entry restriction member 53 Substrate elevating unit operating mechanism (substrate elevating unit operating means)
ph pattern hole Pst paste

Claims (4)

The elevating part that moves up and down relative to the base part, the lower receiving part that elevates and lowers relative to the elevating part, and the elevating part move up and down relative to the base part, the elevating part is located at the lowered position with respect to the base part, and the lower receiving part is raised and lowered A substrate lifting unit having a substrate positioning unit that carries in and positions the substrate when positioned at a lowered position relative to the unit;
A mask plate in which pattern holes corresponding to the arrangement of electrodes on the substrate are formed;
With the lifting / lowering part positioned at the lowered position with respect to the base part, the lower receiving part is raised to the rising position with respect to the lifting / lowering part, and after the substrate positioned by the substrate positioning part is supported by the lower receiving part, the lifting / lowering part is moved to the base part. A substrate lifting unit actuating means for bringing the substrate supported by the lower receiving portion into contact with the mask plate from below;
A squeegee that slides on the mask plate in contact with the substrate and scrapes the paste supplied on the mask plate on the mask plate to transfer the paste to the substrate through the pattern hole of the mask plate;
A substrate that is provided in the substrate positioning portion, and that the lifting portion is positioned at a lowered position with respect to the base portion and the lower receiving portion is positioned at a lowered position with respect to the lifting portion, and a substrate that enters the substrate positioning portion from the upstream side in the substrate transport direction; A substrate that enters the substrate positioning portion from the upstream side in the substrate transport direction when the lift portion is located at a raised position with respect to the base portion and the lower receiving portion is located at a raised position with respect to the lift portion. And a first board entry restricting member located at a position in contact with the screen printing machine.   A substrate that is provided in the lower receiving portion, and in which the lifting portion is positioned at a lowered position with respect to the base portion and the lower receiving portion is positioned at a lowered position with respect to the lifting portion; A substrate that enters the substrate positioning portion from the upstream side in the substrate transport direction when the lift portion is positioned at a lower position with respect to the base portion and the lower receiving portion is positioned at a lift position with respect to the lift portion. The screen printing machine according to claim 1, further comprising a second substrate entry restricting member located at a position where the second substrate entering member is in contact with the screen. The elevating part that moves up and down relative to the base part, the lower receiving part that elevates and lowers relative to the elevating part, and the elevating part move up and down relative to the base part, the elevating part is located at the lowered position with respect to the base part, and the lower receiving part is raised and lowered A substrate elevating unit having a substrate positioning unit for carrying in and positioning the substrate when positioned at a lowered position with respect to the unit, a mask plate in which pattern holes are formed according to the arrangement of electrodes on the substrate, and an elevating unit The lower receiving part is raised to the rising position with respect to the lifting part while being positioned at the lowering position with respect to the base part. After the substrate positioned by the substrate positioning part is supported by the lower receiving part, the lifting part is raised to the base part. The substrate lifting unit actuating means for bringing the substrate supported by the lower receiving portion into contact with the mask plate from below, and the mask plate on which the substrate contacts A screen printing method for a screen printing machine comprising a squeegee that slides and squeezes the paste supplied on the mask plate on the mask plate to transfer the paste to the substrate through the pattern holes of the mask plate. And
Carrying the substrate by the substrate positioning unit in a state where the elevating part is positioned at the lowered position with respect to the base part and the lower receiving part is positioned at the lowered position with respect to the elevating part; and
A step of raising the lower receiving portion from the lowered position with respect to the lifting portion to the raised position and supporting the substrate positioned by the substrate positioning portion from below;
The raising / lowering part is raised to a raised position with respect to the base part, the substrate supported by the lower receiving part is brought into contact with the lower side of the mask plate, and the first substrate entry restriction member provided on the substrate positioning part is moved in the substrate transport direction. A step of positioning at a position in contact with the substrate entering the substrate positioning unit from the upstream side;
And a step of transferring the paste to the substrate through the pattern hole of the mask plate by sliding the squeegee on the mask plate in contact with the substrate and scraping the paste supplied on the mask plate on the mask plate. A screen printing method characterized by the above.   When performing the step of raising the lower receiving portion from the lowered position to the raised position with respect to the lifting portion and supporting the substrate positioned by the substrate positioning portion from below, the second substrate entry restriction member provided in the lower receiving portion is The screen printing method according to claim 3, wherein the screen printing method is positioned at a position in contact with the substrate entering the substrate positioning portion from the upstream side in the substrate transport direction.

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