JP2010278269A - Method of transferring support pin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a support pin remaining in a stocker from interfering with an electronic component mounted to the rear surface of a printed circuit board after some support pins are transferred to a support table accompanied by the change or the like of a model of the printed circuit board. <P>SOLUTION: Support pins 12 are transferred in accordance with arrangement data for support pins 12 to be transferred and arranged to the rear surface of the printed circuit board P. Next, it is checked whether a first one of unused support pins 12 remaining in a stock area SA 1 interferes with each electronic component mounted to the rear surface of the printed circuit board P. By this, a controller 33 firstly reads a left-edge coordinate (Xmin) and a right-edge coordinate (Xmax) of the printed circuit board P to be manufactured hereafter which are stored in its RAM, and then reads the X-coordinate of the first unused support pin 12 and determines whether the X-coordinate of the support pin 12 falls between the left-edge coordinate (Xmin) and the right-edge coordinate (Xmax) of the printed circuit board P. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a support pin transfer method for transferring a support pin supporting a lower surface of a printed circuit board from a stocker to a support table by a transfer member.

  This type of support pin transfer device is disclosed in, for example, Japanese Patent Application Laid-Open No. H10-228443. For example, when a model of a printed circuit board is switched, a new printed circuit board to be produced will be used by a transfer member from a stocker. Although the support pins are transferred to the support table, the support pins that are not transferred to the stocker may remain.

Japanese Patent Laid-Open No. 5-152782

  After the support pins are transferred to the support table, if the support pins remain in the stocker, if electronic components are already mounted on the back side of a new printed circuit board to be produced, they will remain in the stocker. If the support pin and the electronic component already mounted on the back surface of the printed circuit board interfere with each other, the electronic component is damaged and the printed circuit board becomes defective.

  Therefore, the present invention prevents the support pins left in the stocker from interfering with the electronic components mounted on the back surface of the printed circuit board after the support pins are transferred to the support table in accordance with the switching of the printed circuit board model. With the goal.

Therefore, the first invention is a transfer method of a support pin in which a support pin that supports the lower surface of the printed circuit board is transferred from a stocker to a support table by a transfer member.
The support member is transferred from the stocker to the support table by the transfer member,
It is characterized in that it is determined whether or not the support pins left in the stocker after the transfer of the support pins to the support table interfere with electronic components mounted on the back surface of the printed circuit board.

In a second invention, a support pin transfer method for transferring a support pin supporting the lower surface of the printed circuit board from a stocker to a support table by a transfer member,
Transferring the support pin from the stocker to the support table by the transfer member according to the arrangement data of the support pin in the support table;
It is determined whether or not the support pin left in the stocker after the transfer of the support pin to the support table interferes with the mounted electronic component depending on whether or not the support pin is positioned below the printed circuit board. To do.

3rd invention is the transfer method of the support pin which transfers the support pin which supports a printed circuit board lower surface from a stocker to a support table by a transfer member,
The support member is transferred from the stocker to the support table by the transfer member,
It is characterized in that it is determined whether or not the support pins left in the stocker after the transfer of the support pins to the support table interfere with the printed circuit board in the positioning unit.

  According to a fourth aspect of the present invention, in the first to third aspects, when it is determined that interference occurs, a notification device notifies that interference occurs.

  A fifth invention is characterized in that, in the first to third inventions, the stocker and the support table are combined.

  According to the present invention, the support pins left on the stocker and the electronic components mounted on the back surface of the printed circuit board are prevented from interfering with each other after the support pins are transferred to the support table when the model of the printed circuit board is switched. It is possible to prevent the printed circuit board from becoming a defective product by damaging the electronic component.

It is a schematic plan view of a screen printing machine. It is a schematic front view of a screen printing machine. It is a control block diagram. It is a figure which shows the arrangement | positioning data of the support pin mounted before transfer on a backup table. It is a figure which shows the arrangement | positioning data of the support pin which should be transferred and arrange | positioned. It is a figure which shows the arrangement data of the support pin actually arrange | positioned after having been transferred. It is a figure which shows a flowchart. It is a top view of the backup table which shows the state before the transfer in which the support pin is accommodated in the right-and-left part of a stock area. It is a top view of the backup table after transfer. It is a figure which shows the arrangement | positioning data of the support pin which should be transferred and arrange | positioned. It is a figure which shows the arrangement data of the support pin actually arrange | positioned after having been transferred. It is a top view of a backup table in case a support pin and the electronic component already mounted on the printed circuit board interfere. It is a schematic front view of the screen printing machine in the state where the right transfer adsorption nozzle is lowered. It is a schematic front view of the screen printing machine in a state where the backup table is raised.

  Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings for a support pin transfer device for supporting a printed circuit board, and this transfer device is mounted with an electronic component mounted on the printed circuit board. Although the present invention can be applied to an adhesive application apparatus that applies an apparatus or an adhesive onto a printed board, the present invention will be described below by applying it to a screen printing machine that applies an application onto a printed board.

  In FIG. 1 which is a schematic plan view of the screen printing machine and in FIG. 2 which is a front view, the screen printing machine 1 is for printing cream solder as a coating agent on the printed circuit board P, and is installed on the apparatus main body. And a moving mechanism for moving in the Y-axis direction (in the Y direction shown in FIG. 1, the front-rear direction of the screen printing machine 1) disposed above the substrate supporting unit 2 and extending in the horizontal direction. The substrate 3 supported by the screen support unit and the substrate recognition unit 5 is disposed between the substrate support unit 2 and the screen 3 along the board conveying direction with the substrate recognition camera 5 interposed therebetween. A moving body 4 having two transfer heads 6 and the like provided; a screen recognition camera 8 for imaging a screen recognition mark attached to the screen 3; It arranged upward and a like printing mechanism having a squeegee.

  The substrate support unit 2 includes a moving mechanism (not shown) that can move in the X-axis direction, the angular direction in the horizontal plane, and the vertical direction, and a pair of front and rear substrate conveyors 11 that convey the printed circuit board P in the X-axis direction. The backup table 2A that stores the support pins 12 that contact the lower surface of the printed circuit board P and supports the printed circuit board P from below, and is disposed at an appropriate position according to the printed circuit board P and is movable in the Z direction. And a fixed chute 7A and a movable chute 7B that support the printed board P from the side.

  The backup table 2A serves as both a stocker that stocks a plurality of support pins 12 that support the printed circuit board from below and a support table that is supported by the support pins 12 on which the lower surface of the printed circuit board P is disposed. . That is, as shown in FIG. 1, the backup table 2A has a plurality of supports in which the lower portion of the support pin 12 is fitted and accommodated and the locking collar portion 12A formed on the side surface is locked to the upper surface and planted. A hole 13 is opened, and the left and right front portions are stock areas SA1 preset as stockers for storing the support pins 12, and the entire area including the stock areas SA1 is an arrangement area. The stock area SA1 has, for example, 4 rows and 5 columns on each of the left and right sides.

  In this way, the stock area SA1 on the fixed chute 7A side of the front portion of the backup table 2A is an area outside the minimum size of the printed circuit board P. When the movable chute 7B moves, the remaining support pins 12 and This is to prevent interference with the movable chute 7B. The left and right portions at the front portion of the backup table 2A are positioned at the center position in the left and right direction of the backup table 2A. Therefore, if the size of the printed circuit board is small, the left and right ends are left. This is because the possibility of interference with the support pins 12 is reduced.

  Next, the movable body 4 will be described. In the movable body 4, the screw shaft 16 is rotated by the drive of the Y-axis drive motor 15, and the right nut body 17 is moved in the Y direction to move the left guide. It can move in the Y direction along the body 18, and the screw shaft 22 is rotated by driving the X axis drive motor 21, so that the nut body 23 moves in the X direction, thereby moving along the guide body 26 in the Y direction. Can be moved to.

  And the board | substrate recognition camera 5 which images the board | substrate recognition mark of the printed circuit board P mounted on the backup table 2A of the board | substrate support unit 2, and the transfer adsorption nozzle 24 as a transfer member which transfers the support pin 12 are provided. It has two transfer heads 6 and the like. The right transfer head 6 is attached to the moving body 4 so that the longitudinal direction in plan view is in the Y direction, and the left transfer head 6 is in the X direction in plan view. The transfer suction nozzle 24 can communicate with a vacuum source (not shown) and suck and hold the support pin 12 by vacuum suction.

  Further, when the printed circuit board P is caused to flow from the left to the right in FIGS. 1 and 2 by the substrate conveying conveyor 11, the printed circuit board P conveyed to the right transfer suction nozzle 24 comes into contact with and is locked. A stopper 27 is attached.

  Each transfer suction nozzle 24 can be moved up and down by a cylinder 25. When the transfer suction nozzle 24 is lowered, the stopper 27 is also lowered, and the printed board P that has been transported and moved contacts and is locked by the stopper 27. It will be. In this case, the lowering amount of the transfer suction nozzle 24 is set in advance so that the height level of the lowered stopper 27 matches the transport level of the printed circuit board P.

  Further, the moving body 4 is mounted with an optical sensor 29 as a substrate presence / absence detecting device that detects the presence / absence of the printed board P based on the presence / absence of reflected light from the printed board P locked to the stopper 27. A plate 31 is detachably attached by a fixing screw 30 between the transfer head 6 and the substrate recognition camera 5. Instead of the optical sensor 29, another substrate presence / absence detection sensor may be used, for example, a photoelectric sensor, a proximity sensor, or the like.

  The optical sensor 29 irradiates light and receives reflected light if the printed circuit board P is present, so that the presence of the printed circuit board P can be confirmed. You can confirm the existence.

  Next, the control block of the screen printer 1 will be described with reference to FIG. First, reference numeral 33 denotes a control device comprising a microcomputer having a CPU, RAM, ROM, etc., and this control device 33 is used to move the movable body 4 through the drive circuits 34, 35, 36. The drive motor 21, the Y-axis drive motor 15, the movable chute drive motor 37, and the like are controlled.

  Arrangement data relating to the arrangement of the support pins 12 is stored in the RAM as a storage device of the control device 33. That is, the arrangement data of the support pins 12 (see FIG. 4) placed before the transfer on the backup table 2A as the support table (see FIG. 4), the arrangement data of the support pins 12 to be transferred and arranged (see FIG. 5). ), Arrangement data (see FIG. 6) of the support pins 12 actually arranged after the transfer is stored. The origin of this arrangement data is the lower left part of the fixed chute 7A, and the coordinates of each arrangement data are the coordinates where the X and Y coordinates of the origin are zero.

  For convenience of explanation, the control device 33 has a table X-axis drive motor for moving the backup table 2A of the substrate support unit 2 in the X-axis direction and a table for moving in the θ-axis direction (rotation direction in the horizontal plane). A θ-axis drive motor, a screen Y-axis drive motor for moving the screen 3 in the Y-axis direction, and a squeegee Y-axis drive motor for moving the squeegee in the Y-axis direction are controlled, but illustration is omitted here.

  Reference numeral 40 denotes a recognition processing device connected to the control device 33 via an interface 43. The recognition processing unit 40 recognizes an image captured by the screen recognition camera 8 or an image captured by the substrate recognition camera 5. The processing is performed by the processing device 40, and the recognition processing result of both is sent to the control device 33. Then, the control device 33 calculates the amount of positional deviation to relatively position the position of each substrate recognition mark and the position of each screen recognition mark based on the recognition processing result, and stores the calculation result in the built-in storage unit. To do. Therefore, the control device 33 controls the table X-axis drive motor and the table θ-axis drive motor and the screen Y-axis drive motor based on the positional deviation amount, thereby controlling the relative relationship between the printed circuit board P and the screen 3. Correct the misalignment for positioning.

  Reference numeral 41 denotes a monitor for displaying a part image, a screen for setting various data, and the like. The monitor 41 is provided with various touch panel switches 42 as input means, both of which are connected to the control device 33 via an interface 43, Various settings can be performed by the operator operating the touch panel switch 42.

  Next, the transfer operation of the support pins 12 is performed before the production of a new printed circuit board P in accordance with the switching of the model of the printed circuit board P. The interference check of the support pins 12 at that time is shown in FIG. It demonstrates based on the flowchart of these. The support holes 13 of the backup table 2A shown in FIGS. 8, 9 and 10 are formed in a staggered manner across the entire backup table 2A, and the arrangement differs from the support holes 13 formed in FIG. It has become.

  First, as shown in FIG. 8, ten support pins 12 are arranged on each of the left and right sides of the stock area SA1 of the backup table 2A. The arrangement data of the support pins 12 before the transfer is shown in FIG. Has been. Then, when the touch panel switch 42 displayed on the monitor 41 is pressed to select the printed circuit board P to be produced and the operation for the transfer operation of the support pins 12 is performed, it should be transferred and arranged. In accordance with the arrangement data of the support pins 12 (FIG. 5), the transfer operation of the support pins 12 is performed (step S1).

  In this case, the moving body 4 is moved in the plane direction by the Y-axis drive motor 15 and the X-axis drive motor 21, and the transfer suction nozzles 24 provided on both transfer heads 6 are moved up and down while the stock of the backup table 2A is stored. After removing the support pin 12 from the area SA1, the support pin 12 is transferred by inserting into the support hole 13 at a required position.

  Next, in order to check whether an unused pin, that is, an unused support pin 12 in the stock area SA1 that has not been transferred, interferes with an electronic component already mounted on the back surface of the printed circuit board P, the first pin is first checked. Is selected (step S2). In the next step S3, the control device 33 obtains the left end coordinate (Xmin) (see FIG. 9) and the right end coordinate (Xmax) (see FIG. 9) of the printed circuit board P to be produced stored in its own RAM. Read.

  Then, the arrangement data of the support pins 12 to be transferred and arranged on the back surface of the printed circuit board P in FIG. 5 was compared with the arrangement data of the actually arranged support pins 12 after being transferred in FIG. 5 which is the difference in the number of support pins 12 in the case, that is, No. 1, No. 2, No. 3, No. 19 and No. 20 in FIG. 6, that is, in the left part in the stock area SA1. The total number of unused support pins 12 left and the number of unused support pins 12 left on the right side, ie, the number of unused support pins 12 in total, is 5 (the number N of unused support pins 12 = 5 and FIG. 9), interference is checked. The control device 33 compares these five and the first one (n = 1) of the unused support pins 12 to determine whether n is N or less. Is determined (step S4).

  Then, n (“1”) and N (“5”) are compared, and the control device 33 determines that the number is 5 or less. Therefore, in step S5, the X coordinate of the first unused support pin 12 is read. In step S6, the X coordinate of the first unused support pin 12 (the X coordinate of No. 1 is “1”) is the left end coordinate (Xmin = “7”) of the printed circuit board P and the right end coordinate ( Xmax = “19”) is determined.

  Accordingly, since the control device 33 determines that the X coordinate of the first unused support pin 12 is not between the left end coordinate and the right end coordinate of the printed circuit board P, “n = 1” in step S7. "1" is added to and the process returns to step S4. Since “n = 2” is set, “n = 2” and “N = 5” are compared to determine whether n is N or less.

  Then, n (“2”) and N (“5”) are compared and the controller 33 determines that the number is 5 or less. Therefore, in step S5, the X coordinate of the second unused support pin 12 is read. In step S6, the X coordinate of the second unused support pin 12 (the X coordinate of No. 2 is “1”) is the left end coordinate (Xmin = “7”) of the printed circuit board P and the right end coordinate (Xmax). = “19”).

  Accordingly, since the control device 33 determines that the X coordinate of the second unused support pin 12 is not between the left end coordinate and the right end coordinate of the printed circuit board P, “n = 2” in step S7. "1" is added to and the process returns to step S4. Since “n = 3” is set, “n = 3” is compared with “N = 5” to determine whether n is N or less.

  Then, n (“3”) and N (“5”) are compared and the controller 33 determines that the number is 5 or less. Therefore, in step S5, the X coordinate of the third unused support pin 12 is read. In step S6, the X coordinate of the third unused support pin 12 (No. 3 X coordinate is "2") is the left end coordinate (Xmin = "7") of the printed circuit board P and the right end coordinate (Xmax). = “19”).

  Accordingly, since the control device 33 determines that the X coordinate of the third unused support pin 12 is not between the left end coordinate and the right end coordinate of the printed circuit board P, “n = 3” in step S7. "1" is added to and the process returns to step S4. Since “n = 4” is set, “n = 4” and “N = 5” are compared to determine whether n is N or less.

  Then, n (“4”) and N (“5”) are compared and the control device 33 determines that the number is 5 or less. Therefore, in step S5, the X coordinate of the fourth unused support pin 12 is read. In step S6, the X coordinate of the fourth unused support pin 12 (No. 19 X coordinate is “27”) is the left end coordinate (Xmin = “7”) of the printed circuit board P and the right end coordinate (Xmax). = “19”).

  Therefore, since the control device 33 determines that the X coordinate of the fourth unused support pin 12 is not between the left end coordinate and the right end coordinate of the printed circuit board P, “n = 4” in step S7. "1" is added to and the process returns to step S4. Since “n = 5” is set, “n = 5” and “N = 5” are compared to determine whether n is N or less.

  Then, n (“5”) and N (“5”) are compared and the control device 33 determines that the number is 5 or less. Therefore, in step S5, the X coordinate of the fifth unused support pin 12 is read. In step S6, the X coordinate of the fifth unused support pin 12 (the X coordinate of No. 20 is “27”) is the left end coordinate (Xmin = “7”) of the printed circuit board P and the right end coordinate (Xmax). = “19”).

  Accordingly, since the control device 33 determines that the X coordinate of the fifth unused support pin 12 is not between the left end coordinate and the right end coordinate of the printed circuit board P, "n = 4" in step S7. "1" is added to and the process returns to step S4. Since “n = 6” is set, “n = 6” and “N = 5” are compared to determine whether n is N or less.

  In this case, since it is determined that n (“6”) is not equal to or less than N (“5”), in step S8, the control device 33 determines whether or not the support pin 12 has been interfered. In the above case, the fact that the support pin 12 interferes is not stored in the RAM of the control device 33, and the support pin 12 remaining in the stock area SA1 and the electronic component mounted on the back surface of the printed circuit board P are present. Since it is determined that no interference has occurred, the process ends.

  Next, with respect to the case where the five unused support pins 12 at the left and right end portions interfere with electronic components already mounted on the back surface of the printed circuit board P as shown by the dotted lines in FIG. This will be explained based on.

  First, FIG. 10 shows the arrangement data of the support pins to be transferred and arranged, and FIG. 11 shows the arrangement data of the support pins actually arranged after the transfer. When the arrangement data of the support pins 12 to be transferred and arranged on the back surface of the printed circuit board P in FIG. 10 is compared with the arrangement data of the support pins 12 actually arranged after being transferred in FIG. The number of support pins 12 is five, that is, No. 1, No. 2, No. 3, No. 19, and No. 20 in FIG. 11, that is, left in the stock area SA1. In addition, the total number of the five unused support pins 12 and the number of the unused support pins 12 left in the right part, ie, the number of the unused support pins 12 (5 surrounded by the dotted line in FIG. 12). Interference check is performed.

  That is, the X coordinates of the five unused support pins 12 at the left and right end portions are respectively between the left end coordinate (Xmin = 0.5) and the right end coordinate (Xmax = 27.5) of the printed circuit board P. When it is determined whether or not (Step S6), the five coordinates (01, 01), (01, 02), (02, 03), (27, 01), (27, 03) If it is determined that the support pins 12 are inserted, the support pins 12 may interfere with or interfere with electronic components already mounted on the back surface of the printed circuit board P. Stored in the RAM (step S11).

  Therefore, when this storage is performed, when the control device 33 determines in step S8 whether or not there is interference with the support pins 12, the left and right support pins 12 interfere with each other. It is determined that there is a support pin that interferes. In this case, the control device 33 is connected to the monitor 41 as a notification device, for example, “There is a possibility of interference with electronic components already mounted on the back side of the printed circuit board. Remove the following support pins. Coordinates (01, 01), (01,02), (02,03), (27,01), (27,03) "are displayed and notified (step S9). In this case, the notification device is not limited to the monitor 41 and may be notified by other buzzer or voice.

  The work manager who has received this notification pulls out the interfering support pins 12 from the backup table 2A (step S10). Then, after the extraction, the operator presses the touch panel switch 42 displayed on the monitor 41, and checks with the substrate recognition camera 40 and other confirmation devices whether or not these interfering support pins 12 are surely extracted. And confirm. In this case, if it has not been extracted, an extraction operation is performed.

  As described above, the support pins 12 left on the stock area SA1 and the electronic components mounted on the back surface of the print board P after the support pins 12 are transferred to the backup table 2A in accordance with the model change of the print board P and the like. Can be prevented from interfering with each other.

  Then, after checking whether or not the electronic component mounted on the back side of the printed circuit board and the support pin 12 interfere with each other and confirming that there is no interference, the process proceeds to the printing operation. Will be explained.

  First, since the printed circuit board P inherited from the upstream side flows from the left to the right in FIGS. 1 and 2 by the substrate transport conveyor 11, the right transfer suction nozzle 24 with the stopper 27 fixed is lowered by the cylinder 25. As shown in FIG. 13, the printed circuit board P that has been transported and moved comes into contact with and locks against the stopper 27 and is positioned.

  At this time, when the optical sensor 29 detects the printed board P, the backup table 2A is raised while the printed board P is supported by the fixed chute 7A and the movable chute 7B from the side, and a plurality of printed boards P are provided. The support pins 12 are horizontally supported (only one is shown for convenience in FIGS. 2, 13, and 14). In this case, the printed circuit board P can be supported horizontally by the plurality of support pins 12 without interfering with the support pins 12 and the electronic components already mounted on the back surface of the printed circuit board P.

  Then, the screen recognition mark attached to the screen 3 is picked up by the screen recognition camera 8 and the board recognition mark attached to the printed board P is picked up by the substrate recognition camera 5, and the recognition processing device 40 makes these images. The recognition processing result is sent to the control device 33. Then, the control device 33 calculates the amount of positional deviation to relatively position the position of each board recognition mark and the position of each screen recognition mark based on the recognition processing result, and stores the calculation result in the built-in RAM. At the same time, the control device 33 controls the X-axis drive motor and the table θ-axis drive motor of the substrate support unit 2 and the Y-axis drive motor of the screen 3 based on the positional deviation amount. And the relative position deviation of the screen 3 is corrected for positioning.

  Then, the board support unit 2 is further raised, the printed board P supported by the support pins 12 is brought into close contact with the lower surface of the screen 3, the printing mechanism is operated, and a squeegee (not shown) applies cream solder. Printing is performed on the printed circuit board P through the printing pattern holes of the screen 3, and after the printing is finished, the substrate support unit 2 is lowered and conveyed downstream from the backup table 2A.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various embodiments described above without departing from the spirit of the present invention. It encompasses alternatives, modifications or variations.

2A Backup table 2 Substrate support unit 3 Screen 4 Moving body 6 Transfer head 11 Substrate transport conveyor 12 Support pin 24 Transfer suction nozzle 33 Control device

Claims (5)

In the transfer method of the support pins for transferring the support pins supporting the lower surface of the printed circuit board from the stocker to the support table by the transfer member,
The support member is transferred from the stocker to the support table by the transfer member,
It is determined whether or not the support pins left in the stocker after the transfer of the support pins to the support table interfere with electronic components mounted on the back surface of the printed circuit board. . In the transfer method of the support pins for transferring the support pins supporting the lower surface of the printed circuit board from the stocker to the support table by the transfer member,
Transferring the support pin from the stocker to the support table by the transfer member according to the arrangement data of the support pin in the support table;
It is determined whether or not the support pin left in the stocker after the transfer of the support pin to the support table interferes with the mounted electronic component depending on whether or not the support pin is positioned below the printed circuit board. To transfer the support pins. In the transfer method of the support pins for transferring the support pins supporting the lower surface of the printed circuit board from the stocker to the support table by the transfer member,
The support member is transferred from the stocker to the support table by the transfer member,
A method of transferring a support pin, comprising: determining whether or not the support pin left in the stocker after the transfer of the support pin to the support table interferes with a printed circuit board in a positioning unit.   The method of transferring a support pin according to any one of claims 1 to 3, wherein when the interference is determined, the notification device notifies the interference.   The method for transferring a support pin according to claim 1, wherein the stocker and the support table are used together.

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