JP2011189670A - Screen printing machine and mask installation method in screen printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen printing machine that dispenses with attachment and detachment of a screw whenever the distance between mask support rails is adjusted and that can improve workability in mask installation, and to provide a mask installation method in a screen printing machine. <P>SOLUTION: The screen printing machine includes: a pair of front and rear guide members 31 that are horizontally extended and arranged in the upper part of a substrate holding part 24 for holding a substrate 2; a pair of mask support rails 32 that are freely movably installed along the pair of front and rear guide members 31 and the distance therebetween can be adjusted while the parallel posture of them is maintained; and a plurality of rail fixing devices 33 that are installed in each mask support rail 32 and fix the pair of mask support rails 32 to the guide members 31 by lowering a fixing pin 43 installed movably in a vertical direction from an elevated position and fitting it into a fixing pin fitting hole 31b formed in the guide members 31 while adjusting the distance between the pair of mask support rails 32. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a screen printer for printing a paste on a substrate through a mask and a mask installation method in the screen printer.

  A screen printer that prints a paste such as solder paste on a substrate held by the substrate holding unit makes the mask in which pattern holes corresponding to the electrodes on the substrate are formed contact the substrate so that the electrodes and the pattern holes are aligned vertically. After that, the paste is transferred to the electrodes through the pattern holes of the mask by sliding the squeegee on the mask supplied with the paste and scraping the paste.

  In such a screen printing machine, the mask is held in a horizontal position by a mask holder provided above the substrate holding unit. The mask holder is provided with a guide member that extends horizontally above the substrate holding portion and a pair of mask supports that are movably provided along the guide member and can adjust the distance while maintaining a parallel posture. The mask is configured to have a rail, and the mask is configured such that both sides facing each other are supported by a pair of mask support rails fixed to the guide member.

  Here, when the size of the mask varies depending on the type of substrate to be produced, it is necessary to move the mask support rail along the guide member to change the interval. For this reason, conventionally, when the distance between the mask support rails is adjusted in accordance with the outer diameter of the mask, holes that coincide vertically are provided in both the mask support rail and the guide member to adjust the distance between the mask support rails. After that, the mask support rail is fixed to the guide member by inserting a fixing screw into both the hole provided in the mask support rail and the hole provided in the guide member (for example, a patent Reference 1).

JP 2006-7625 A

  However, in the above conventional screen printing machine, it is necessary to attach and detach the screw for fixing the mask support rail to the guide member every time the interval between the mask support rails is adjusted, and it takes time for the work and the screw is not lost. Since it was necessary to pay close attention, there was a problem that workability at the time of mask installation was not good.

  Accordingly, the present invention provides a screen printing machine and a mask installation method in the screen printing machine that can improve the workability at the time of mask installation without having to attach and detach the screw every time the interval of the mask support rail is adjusted. The purpose is to provide.

  The screen printing machine according to claim 1 is provided so as to be movable along the guide member, a substrate holding portion that holds the substrate, a guide member that extends horizontally above the substrate holding portion, and is parallel to each other. A pair of mask support rails that can adjust the distance while maintaining a proper posture, and a pin-like member that is provided on each mask support rail and that can be raised and lowered while the distance between the pair of mask support rails is adjusted A plurality of rail fixing means for fixing the pair of mask support rails to the guide member by lowering the guide from the raised position and inserting it into pin-like member insertion holes provided in the guide member, and a pair of masks fixed to the guide member In a state where both opposing sides are supported by the support rail, the mask that is in contact with the substrate held by the substrate holding portion and the mask that is in contact with the substrate slide on the mask. By scrape the supplied paste on the mask, and a squeegee for transferring the paste to the substrate through a mask.

  A screen printing machine according to a second aspect is the screen printing machine according to the first aspect, wherein the manually operated operation means and the pin-like member of each rail fixing means are moved up and down according to the manual operation of the operation means. And a pin-like member raising / lowering mechanism.

  The screen printing machine according to claim 3 is the screen printing machine according to claim 2, wherein the pin-like member lifting mechanism is at least one of the plurality of rail fixing means according to a manual operation of the operating means. The pin-like members of the two rail fixing means are moved up and down simultaneously.

  The mask installation method in the screen printing machine according to claim 4 is provided with a substrate holding portion for holding a substrate, a guide member extending horizontally above the substrate holding portion, and movable along the guide member. A pair of mask support rails that can be adjusted in intervals while maintaining parallel postures, and provided on each mask support rail, and can be moved up and down while the distance between the pair of mask support rails is adjusted. A plurality of rail fixing means for fixing the pair of mask support rails to the guide member by lowering the pin-shaped member from the raised position and inserting the pin-shaped member into a pin-shaped member insertion hole provided in the guide member; The mask that is in contact with the substrate held by the substrate holding portion and the mask that is in contact with the substrate in a state where both opposing sides are supported by the pair of mask support rails. A method for installing a mask in a screen printing machine comprising a squeegee that slides on the mask and squeezes the paste supplied onto the mask onto the substrate by transferring the paste to the substrate through the mask. Removing the pin from the pin-like member insertion hole provided in the guide member by lifting the pin-like member included in the fixing means from the lowered position, and releasing the fixation of the mask support rail to the guide member by the rail fixing means; and mask support A step of adjusting a distance between the pair of mask support rails according to an outer diameter of the mask by moving the pair of mask support rails along the guide member after releasing the fixing of the rails to the guide member; After adjusting the mask support rail spacing according to the outer diameter of the mask, each rail fixing means has a pin-shaped part Is lowered from the raised position to be fitted into a pin-like member insertion hole provided in the guide member, and the pair of mask support rails are fixed to the guide member, and the mask is fixed to the pair of mask support rails fixed to the guide member. Supporting both sides facing each other.

  The mask installation method in the screen printing machine according to claim 5 is the mask installation method in the screen printing machine according to claim 4, wherein the pin-like member of each rail fixing means is moved up and down in response to manual operation of the operation means. I tried to do it.

  The mask installation method in the screen printing machine according to claim 6 is the mask installation method in the screen printing machine according to claim 5, wherein at least one of the plurality of rail fixing means according to a manual operation of the operation means. The pin-shaped members of the two rail fixing means are moved up and down simultaneously.

  In the present invention, in a state where the distance between the pair of mask support rails is adjusted, each pin-like member of the plurality of rail fixing means provided on each mask support rail is inserted into the pin-like member insertion hole provided on the guide member. Since the mask support rail is fixed to the guide member by inserting it, it is not necessary to attach and detach the screw every time the mask support rail interval is adjusted as in the past, and workability at the time of mask installation Can be improved.

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 installed in the mask holder with which the screen printing machine in one embodiment of this invention is equipped, and the mask holder The perspective view of the mask holder 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 operation | movement control system of the mask fixed cylinder with which the screen printer in one embodiment of this invention is provided. The flowchart which shows the procedure of the screen printing operation which the screen printer in one embodiment of this invention performs (A) (b) The front view of the board | substrate holding | maintenance movement unit with which the screen printer in one embodiment of this invention is provided. (A) (b) Side view of the substrate holding and moving unit provided in the screen printer in one embodiment of the present invention. (A) (b) Side view of the substrate holding and moving unit provided in the screen printer in one embodiment of the present invention. (A) (b) (c) Side view of the substrate holding and moving unit provided in the screen printing machine according to the embodiment of the present invention. (A) (b) (c) Side view of the substrate holding and moving unit provided in the screen printing machine according to the embodiment of the present invention. (A) (b) The perspective view of the mask holder with which the screen printer in one embodiment of this invention is provided (A) (b) The perspective view of the mask holder with which the screen printer in one embodiment of this invention is provided (A) (b) The perspective view of the mask holder 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 (left-right) 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 and a camera unit 15 are provided.

  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 is attached to the upper end of the receiving unit elevating guide 22b and supported by a pair of front and rear belt conveyor supporting members 23a that elevate and lower with respect to the base table 21d together with the elevating table 22a, and each belt conveyor supporting member 23a. The front and rear belt conveyors 23b are moved forward and backward in the X-axis direction, and the front and rear belt conveyors 23b are operated in synchronization, whereby the substrate 2 is transported in the X-axis direction.

  2 and 3, the substrate holding part 24 is a pair of front and rear clamping members 24a (see also FIG. 1) provided on the upper parts of the front and rear belt conveyor support members 23a provided in the conveyor part 23 so as to be movable in the Y-axis direction. ), A lower receiving unit support table 24b which is guided by the lower receiving unit elevating guide 22b and which is moved up and down, and a 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 clamp 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 23b and supported 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).

  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. A mask holder 30 for holding the mask 13 in a horizontal posture is attached.

  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.

  4 and 5, the mask holder 30 is disposed so that both ends thereof are attached to the portal frame 28 and extends in the X-axis direction (and thus horizontally) above the substrate holding portion 24 included in the substrate holding and moving unit 12. A pair of front and rear guide members 31 are provided so as to extend in the Y-axis direction (and therefore horizontally) and to be movable in the X-axis direction along the front and rear guide members 31, and the distance between the guide members 31 can be adjusted while maintaining a parallel posture. And a pair of left and right mask support rails 32.

  4 and 5, the mask support rail 32 is attached to both guide members 31 on the outer side surface in the X-axis direction of each mask support rail 32 (the side surface opposite to the side where the mask support rails 32 face each other). A pair of front and rear rail fixing devices 33 (rail fixing means) are provided for fixing to the rail. Of the pair of front and rear rail fixing devices 33, the rail fixing device 33 positioned in the front is disposed above the front guide member 31, and the rail fixing device 33 positioned rearward of the pair of front and rear rail fixing devices 33 is It is arranged above the rear guide member 31.

  Each rail fixing device 33 has a fixed pin elevating cylinder 41 for projecting and retracting the rod portion 41a upward, and one end attached to the upper end of the rod portion 41a of the fixed pin elevating cylinder 41 and extending in the horizontal direction (Y-axis direction). A flat plate member 42 and a fixed pin 43 (pin-shaped member) having an upper end attached to the other end of the flat plate member 42 and extending downward, and the rod portion 41a of the fixed pin lift cylinder 41 is moved up and down. Thus, the fixing pin 43 can be moved up and down between the raised position and the lowered position via the flat plate member 42 (arrow A shown in FIG. 5).

  In FIG. 5, a pair of left and right mask support rails 32 are provided on the upper surfaces of the front and rear guide members 31 so that the distance between them is a length corresponding to the outer diameter of the mask 13 used by the screen printer 1. When adjusted (arrow B shown in FIG. 5), a specific portion of each mask support rail 32 (for example, the lower edge portion on the outer side surface of the mask support rail 32) is positioned in the Y-axis direction. A guide wire 31a extending in the direction is provided. In addition, each guide member 31 can be fitted from above by lowering the fixing pin 43 of the rail fixing device 33 provided in the mask support rail 32 in a state where the mask support rail 32 is aligned with the guide line 31a. A fixing pin insertion hole 31 b is provided extending in the thickness direction (Z-axis direction) of the guide member 31.

  The guide wire 31a and the fixed pin insertion hole 31b are provided for each of a plurality of types of masks 13 having different outer diameters used by the screen printer 1. Therefore, on each guide member 31, a plurality of guide lines 31 a and fixing pin insertion holes 31 b corresponding to the types of the masks 13 having different outer diameters are arranged in the movement direction (X-axis direction) of the mask support rail 32. Is provided.

  When the operator OP adjusts the distance between the pair of left and right mask support rails 32 according to the outer diameter size of the mask 13 to be used, a plurality of guides in which specific portions of the mask support rails 32 are arranged on the guide member 31 are arranged. The guide line 31a is selected so as to correspond to the outer diameter of the mask 13 from the line 31a. Then, from the state in which the distance between the mask support rails 32 is adjusted, of the four rail fixing devices 33 provided on the pair of left and right mask support rails 32, the mask support rails 32 are attached to the left mask support rail 32 as viewed from the operator OP. The fixing pins 43 of the pair of front and rear rail fixing devices 33 (the left rail fixing device 33) are lowered from the raised position to the lowered position to be fitted into the fixed pin insertion holes 31b provided in both guide members 31, and Of the four rail fixing devices 33, the fixing pins 43 of the pair of front and rear rail fixing devices 33 (the right rail fixing device 33) attached to the right mask support rail 32 as viewed from the operator OP are moved from the raised position to the lowered position. The distance is adjusted by lowering and inserting into fixed pin insertion holes 31b provided in both guide members 31. A pair of left and right mask support rails 32 in the state, can be fixed to the pair of guide members 31 back and forth.

  4 and 5, a plurality of mask fixing cylinders 34 each having a rod portion 34a that can be protruded and retracted downward are provided on the inner side surface of each mask support rail 32 (the side surface on which the mask support rails 32 face each other). It is provided one by one (here, two each, a total of four). The mask 13 is inserted between the pair of left and right mask support rails 32 and pushed backward until the leading portion of the mask frame 13w comes into contact with a stopper 32a (see also FIG. 1) provided on the mask support rails 32. Is attached to the mask holder 30 and supported by the pair of left and right mask support rails 32. With the mask 13 being supported by the pair of left and right mask support rails 32 in this way, The mask 13 can be fixed on the mask support rail 32 by projecting (lowering) each rod portion 34a from the raised position to the lowered position and bringing it into contact with the upper surface of the mask frame 13w from above.

  1 and 2, the pair of portal frames 28 support both ends of an X-axis stage 51 extending in the X-axis direction so as to be slidable in the Y-axis direction. A camera support stage 52 is provided on the X-axis stage 51 so as to be movable in the X-axis direction. The camera unit 15 is attached to the camera support stage 52. 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 FIGS. 1 and 2, both ends of a squeegee base 53 extending in the X-axis direction are supported by a pair of portal frames 28, and the squeegee base 53 reciprocates in the Y-axis direction along the portal frame 28. It is free to move. The squeegee base 53 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 53 so as to be movable up and down.

  In this screen printing machine 1, the control device 60 (FIG. 6) 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. Clamping operation of the substrate 2 by the clamp member 24a is performed by controlling the operation of the substrate transport path operating mechanism 61 (FIG. 6) including an actuator (not shown). The control device 60 is a clamp member operating mechanism including an actuator (not shown). This is done by performing the operation control 62 (FIG. 6).

  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. 6) including an actuator including Mx.

  Movement of the camera unit 15 in the horizontal plane, that is, movement of the X-axis stage 51 in the Y-axis direction with respect to the pair of portal frames 28 and movement of the camera support stage 52 in the X-axis direction with respect to the X-axis stage 51 Each control is performed when the control device 60 controls the operation of the camera unit moving mechanism 64 (FIG. 6) including an actuator (not shown).

  The operation control of the squeegee base 53 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. 6) including an actuator (not shown). Further, the raising / lowering operation of each squeegee 14 with respect to the squeegee base 53 is performed when the control device 60 controls the operation of a squeegee raising / lowering cylinder 66 (FIG. 2, FIG. 3 and FIG. 6) attached to the upper part of the squeegee base 53. .

  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 the imaging of the first camera 15a and the image data obtained by the imaging of the second camera 15b are input to the control device 60 (FIG. 6).

  4 and 5, a left valve 71 having a push button type left switch 71a as an operation means manually operated by an operator OP is provided at the front end of the left mask support rail 32, and the right side At the front end of the mask support rail 32, a right valve 72 having a push button type right switch 72a as an operating means which is also manually operated by the operator OP is provided.

  The pair of front and rear fixed pin elevating cylinders 41 constituting the left rail fixing device 33 and the left valve 71 are connected by a pneumatic pipe (not shown), and the operator OP performs the pressing operation of the left switch 71a or releasing the pressing operation. When the position of the spool (not shown) of the left valve 71 is switched, the pneumatic pressure supply path to each of the two fixed pin lifting cylinders 41 constituting the left rail fixing device 33 is switched, and the two fixed pins are lifted and lowered. The rod portions 41a of the cylinder 41 (and therefore the pair of front and rear fixing pins 43 connected to the rod portions 41a) are moved up and down simultaneously. Here, when the operator OP presses the left switch 71a, the left and right pair of fixing pins 43 are simultaneously raised from the lowered position to the raised position, and when the operator OP releases the pressing operation of the left switch 71a, the left and right pair of front and rear fixed pins 43 are simultaneously lifted. The fixing pins 43 of the first and second fixing pins 43 are simultaneously lowered from the raised position to the lowered position.

  Similarly, the pair of front and rear fixed pin elevating cylinders 41 and the right valve 72 constituting the right rail fixing device 33 are connected by a pneumatic pipe (not shown), and the operator OP presses or presses the right switch 72a. Is released and the position of the spool (not shown) of the right valve 72 is switched, the air pressure supply path to each of the two fixing pin elevating cylinders 41 constituting the right rail fixing device 33 is switched. The rod portions 41a of the two fixed pin lifting cylinders 41 (and therefore the pair of front and rear fixed pins 43 connected to the rod portions 41a) are moved up and down simultaneously. Here, when the operator OP presses the right switch 72a, the pair of right and left fixing pins 43 are simultaneously lifted from the lowered position to the raised position, and when the operator OP releases the pressing operation of the right switch 72a, The fixing pins 43 of the first and second fixing pins 43 are simultaneously lowered from the raised position to the lowered position.

  In FIG. 7, the operation panel 70 provided on the base 11 is provided with a push button type mask fixing cylinder raising switch 73a and a mask fixing cylinder lowering switch 73b operated by an operator OP (see also FIG. 6). ). When the operator OP presses the mask fixing cylinder ascent switch 73a from the state where each mask fixing cylinder 34 is in the lowered position, the control device 60 fixes the four masks arranged corresponding to the four mask fixing cylinders 34. The respective rod portions 34a of the four mask fixing cylinders 34 are simultaneously raised from the lowered position to the raised position via the cylinder operation valve 34b. When the operator OP presses the mask fixing cylinder lowering switch 73b from this state, the control device 60 causes the rod portions 34a of the four mask fixing cylinders 34 to pass through the four mask fixing cylinder operation valves 34b. Are simultaneously lowered from the raised position to the lowered position.

  Next, the operation procedure of the screen printing machine 1 will be described with reference to the flowchart of FIG. 8 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. 9A). 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. 9A), 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. 9B). Substrate loading step shown in flop ST1).

  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. Then, 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. 10 (a)). Then, the clamp member 24a is operated (arrow E1 shown in FIG. 10B), and both sides of the substrate 2 on the conveyor portion 23 are clamped by the front and rear clamp members 24a (FIG. 10B).

  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. 11 (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 23b 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. 11A). The substrate holding step shown in step ST2 of FIG.

  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 (moves the X-axis stage 51 in the Y-axis direction and moves the camera support stage 52). 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. 8).

  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. 11B), 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. 11 (b). Contacting step shown in step ST4 of FIG. 8). 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 80 (FIG. 12A). 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 restart button has been operated after step ST4 (first determination step shown in step ST5 in FIG. 8), and determines that the operation restart button has been operated In this case, the operation interruption of the screen printing machine 1 is canceled, the squeegee 14 (the squeegee base 53) is moved back and forth in the Y-axis direction, and the paste Pst is filled in the pattern holes 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. 8).

  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. 12) is lowered and the lower edge thereof is brought into contact (contact) with the upper surface of the mask 13. Thereafter, the squeegee base 53 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 clamping member 24a (FIG. 12B). 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 53 is stopped, the front squeegee 14 is lifted away from the mask 13 and the rear squeegee 14 (FIG. 12). 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 53 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 up to the upper surface region of the front clamp member 24a (FIG. 12 ( 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. 13A), and removes the substrate 2 from the mask 13. They are separated (FIG. 13 (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. 8).

  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. 13B), 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. 13C), and the substrate 2 is lowered onto the conveyor unit 23 (FIG. 13C). 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. 8).

  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 printing machine 1 (substrate carry-out process shown in step ST9 in FIG. 8).

  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. 8). 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, screen printing is performed on the substrate 2 by the above-described procedure. When the size of the mask 13 to be installed is changed due to the type of the substrate 2 being changed, the operator OP changes the mask holder 30. The mask 13 is set on the mask holder 30 after the operation of changing the distance between the pair of left and right mask support rails 32 included in the mask holder 30 is performed.

  When changing the interval between the mask support rails 32, the operator OP first presses the mask fixing cylinder ascent switch 73a to raise the rod portions 34a of the total four mask fixing cylinders 34 from the lowered position to the raised position. Then, the fixation of the mask 13 to the pair of left and right mask support rails 32 is released. The left switch 71a is pressed to raise the left pair of front and rear fixed pins 43 from the lowered position to the raised position, and the right switch 72a is pushed to raise the right pair of front and rear fixed pins 43 from the lowered position. By raising to the position, all the fixing pins 43 provided in the four rail fixing devices 33 are removed from the fixing pin insertion holes 31b provided in the guide member 31, and the mask fixing rails 33 are guided by the rail fixing device 33. The fixing to the member 31 is released (FIG. 14A. See the arrow A1 shown in the figure. Rail fixing releasing step).

  When the operator OP releases the fixation of the mask support rail 32 to the guide member 31 by the rail fixing device 33, the operator OP remains in that state (while pressing the left switch 71a and the right switch 72a, respectively) and supports the pair of left and right masks. The distance between the pair of left and right mask support rails 32 is adjusted according to the outer diameter of the mask 13 by moving the rail 32 along the pair of front and rear guide members 31 in the X-axis direction (rail distance adjustment step, FIG. 14). (B) Arrow B shown in the figure. At this time, each of the left mask support rail 32 and the right mask rail 32 has a specific portion that coincides with the guide line 31 a on the guide member 31 corresponding to the outer diameter of the mask 13.

  When the operator OP adjusts the distance between the pair of mask support rails 32 according to the outer diameter of the mask 13 as described above, the operator OP releases the pressing operation of the left switch 71a and raises the pair of front and rear fixing pins 43 on the left side. It is lowered from the position to the lowered position and is fitted into the fixed pin insertion holes 31b provided in the pair of front and rear guide members 31, and the pressing operation of the right switch 72a is released, and the right pair of front and rear fixed pins 43 are moved from the raised position. The pair of left and right mask support rails 32 is moved down to the lowered position and inserted into the fixing pin insertion holes 31b provided in the pair of front and rear guide members 31 (arrow A2 shown in FIG. 15A). It fixes to 31 (rail fixing process).

  When the operator OP fixes the pair of mask support rails 32 to the guide member 31 as described above, the operator OP inserts the mask 13 between the pair of mask support rails 32 fixed to the guide member 31 (FIG. 15B). The arrow H shown in the figure), and as described above, the head portion of the mask frame 13w is pushed backward until it abuts against the stopper 32a provided on the mask support rail 32 (FIG. 16A), and a pair of mask supports Both sides of the rail 32 facing the mask 13 (here, facing in the X-axis direction) are supported (mask support process).

  Then, the operator OP presses the mask fixing cylinder lowering switch 73b to lower each rod portion 34a of the four mask fixing cylinders 34 from the raised position to the lowered position (arrow K shown in FIG. 16B). The mask frame 13w is pressed and fixed onto the pair of left and right support rails 32 by the rod portions 34a of the four mask fixing cylinders 34 (FIG. 16B, mask fixing step).

  As described above, in the screen printer 1 and the mask installation method in the screen printer 1 according to the present embodiment, the mask support rails 32 are provided on the mask support rails 32 with the distance between the pair of mask support rails 32 adjusted. In addition, the fixing pins 43 of the plurality of rail fixing devices 33 (the number is four in the above example) may be inserted into the fixing pin insertion holes 31b provided in the pair of front and rear guide members 31. As a result, the pair of left and right mask support rails 32 are fixed to the guide member 31, so that it is not necessary to attach and detach the screws each time the distance between the mask support rails 32 is adjusted as in the prior art. The workability at the time can be improved.

  Further, in the screen printing machine 1 according to the present embodiment, the left switch 71a and the right switch 72a as operation means to be manually operated, and the fixing pin of each rail fixing device 33 according to the manual operation of both the switches 71a and 72a. 43 has a pin-like member raising / lowering mechanism comprising a left valve 71, a right valve 72, and four fixed pin raising / lowering cylinders 41, and the fixing pin 43 is raised / lowered by a one-touch operation by the operator OP. Therefore, the workability at the time of mask installation can be further improved. In particular, in the present embodiment, the pin-like member raising / lowering mechanism is configured to simultaneously raise and lower the fixing pins 43 of the left and right rail fixing devices 33 according to the manual operation of the left switch 71a and the right switch 72a. Therefore, it is very easy to adjust the distance between the mask support rails 32.

  Although the embodiments of the present invention have been described so far, the present invention is not limited to those shown in the above-described embodiments. For example, in the above-described embodiment, each fixing pin 43 included in the four rail fixing devices 33 is lifted and lowered by the pin-like member lifting mechanism. Instead of the lifting mechanism, the operator OP may be manually raised and lowered.

  In the above-described embodiment, the pair of left and right fixing pins 43 are simultaneously lifted and lowered by the operation of the left switch 71a by the pin-like member lifting mechanism, and the right and left pair of fixing pins 43 are simultaneously lifted by the operation of the right switch 72a. The pin-like member raising / lowering mechanism has been adapted to be lifted / lowered, but the pin-like member lifting / lowering mechanism has at least two rail fixing devices 33 out of the four rail fixing devices 33 (that is, a plurality of rail fixing devices) according to the manual operation of the operation means. It is preferable that the fixed pins 43 are simultaneously lifted and lowered, and the four fixed pins 43 may be lifted and lowered simultaneously by operation of one operating means manually operated by the operator OP. .

  Provided are a screen printing machine and a mask installation method in a screen printing machine, which can improve the workability at the time of mask installation without having to attach and detach screws every time the interval of the mask support rail is adjusted.

DESCRIPTION OF SYMBOLS 1 Screen printer 2 Board | substrate 13 Mask 14 Squeegee 24 Board | substrate holding | maintenance part 31 Guide member 31b Fixed pin insertion hole (pin-shaped member insertion hole)
32 Mask support rail 33 Rail fixing device (rail fixing means)
41 Fixed Pin Lifting Cylinder (Pin-shaped Member Lifting Mechanism)
43 Fixing pin (pin-shaped member)
71 Left valve (Pin-shaped member lifting mechanism)
71a Left switch (operating means)
72 Right side valve (Pin-shaped member lifting mechanism)
72a Right switch (operating means)
Pst paste

Claims (6)

A substrate holder for holding the substrate;
A guide member disposed horizontally extending above the substrate holder;
A pair of mask support rails that are movably provided along the guide member and that can adjust the distance while maintaining a parallel posture;
A pin-shaped member provided on each mask support rail, with the distance between the pair of mask support rails adjusted, is lowered from a raised position to a pin-shaped member insertion hole provided on the guide member. A plurality of rail fixing means for fixing the pair of mask support rails to the guide member by fitting,
A mask that is in contact with the substrate held by the substrate holding portion in a state where both sides facing each other are supported by a pair of mask support rails fixed to the guide member;
Screen printing characterized by comprising a squeegee that slides on a mask in contact with the substrate and scrapes the paste supplied on the mask onto the mask to transfer the paste to the substrate through the mask Machine. Manually operated operating means;
2. The screen printing machine according to claim 1, further comprising a pin-like member lifting mechanism for raising and lowering the pin-like member of each rail fixing means in accordance with a manual operation of the operation means.   The said pin-shaped member raising / lowering mechanism raises / lowers the pin-shaped member of at least two rail fixing means of the said plurality of rail fixing means simultaneously according to manual operation of an operating means. Screen printing machine. A substrate holding part that holds the substrate, a guide member that extends horizontally above the substrate holding part, and a guide member that is movable along the guide member. The distance between the two can be adjusted while maintaining a parallel posture. A pair of mask support rails and a pin-like member provided on each mask support rail, the pin-like member provided so as to be able to move up and down are adjusted and provided on the guide member with the distance between the pair of mask support rails adjusted. A plurality of rail fixing means for fixing the pair of mask support rails to the guide member by being inserted into the pin-shaped member insertion holes, and opposite sides supported by the pair of mask support rails fixed to the guide member In this state, the mask that is in contact with the substrate held by the substrate holder and the mask that is in contact with the substrate slide on the mask, and the paste supplied on the mask is scraped on the mask. By, a mask installation method in the screen printing machine comprising a squeegee for transferring the paste to the substrate through a mask,
A step of lifting the pin-shaped member included in each rail fixing means from the lowered position to remove it from the pin-shaped member insertion hole provided in the guide member and releasing the fixation of the mask support rail to the guide member by the rail fixing means;
Adjusting the distance between the pair of mask support rails according to the outer diameter of the mask by moving the pair of mask support rails along the guide member after releasing the fixation of the mask support rail to the guide member;
After the distance between the pair of mask support rails is adjusted according to the outer diameter of the mask, the pin-like member provided in each rail fixing means is lowered from the raised position to be fitted into the pin-like member insertion hole provided in the guide member. And fixing the pair of mask support rails to the guide member;
And a step of supporting the opposite sides of the mask on a pair of mask support rails fixed to the guide member.   5. The method of installing a mask in a screen printing machine according to claim 4, wherein the pin-like member of each rail fixing means is raised and lowered in response to a manual operation of the operating means.   6. The mask for a screen printing machine according to claim 5, wherein the pin-like members of at least two rail fixing means among the plurality of rail fixing means are moved up and down simultaneously in response to manual operation of the operation means. Installation method.

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