JP5096420B2 - Printed circuit board support device - Google Patents

Description

  The present invention relates to a printed circuit board support device that supports a printed circuit board supported by a pair of conveying chutes from below with a plurality of support pins that are detachably mounted on a support table.

  This type of printed circuit board support device is disclosed in, for example, Japanese Patent Application Laid-Open No. H10-228707. However, sometimes the support pin is removed from the support hole provided in the support table.

Japanese Patent Laid-Open No. 5-152782

  However, if the support pin is removed from the support hole provided in the support table, the support pin has a generally cylindrical shape, so it is dangerous for the operator if it falls off the support table, is lost, or goes outside the screen printer. It is.

  Therefore, an object of the present invention is to prevent the support pin from falling off the support table even if the support pin falls on the support table or the support pin is removed from the opened support hole.

  For this reason, the first invention is a printed circuit board support device for supporting a printed circuit board supported by a pair of conveying chutes from below with a plurality of support pins that are detachably disposed in a support hole provided in a support table. Further, a fall prevention member is provided for preventing the support pins that have been removed from the support holes of the support table from dropping from the support table.

  The second invention is a printed circuit board support device for supporting a printed circuit board supported by a pair of conveyance chutes from below with a plurality of support pins arranged to be inserted into and removed from a support hole provided in a support table. A fall prevention member is provided at an outer peripheral edge portion of the support table to prevent the support pins that have been removed from the support holes of the support table from dropping from the support table.

  According to a third invention, in the first or second invention, the transport chute comprises a fixed chute and a movable chute, and the height of the fall prevention member near the fixed chute from the upper surface of the support table is determined by the support. The height of the support pin inserted into the hole is the same as the height from the upper surface of the support table.

  According to the present invention, even if the support pin falls on the support table or the support pin is removed from the opened support hole, it can be prevented from rolling off from the support table and is not lost. It is safe for workers.

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 top view of a backup table. 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 right view of the board | substrate support unit before raising which shows other embodiment of a fall prevention wall. It is a right view of the board | substrate support unit of the raised state which shows other embodiment of a fall prevention wall.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings for a printed circuit board support device. The printed circuit board support device is an electronic component mounting device or adhesive for mounting electronic components on a printed circuit board. The present invention can be applied to an adhesive application device that applies a coating material on a printed circuit board, but will be described below by applying it to a screen printer that applies a coating material on a printed circuit board.

  In FIG. 1 which is a schematic plan view of the screen printing machine and in FIG. 2 which is a front view of the screen printing machine which partially cuts the backup table 2A, the screen printing machine 1 prints cream solder as a coating agent on the printed circuit board P. The substrate support unit 2 installed on the apparatus main body, and the Y-axis direction extending above the substrate support unit 2 and extending in the horizontal direction (in the Y direction shown in FIG. The substrate recognition camera 5 and the substrate recognition camera 5 disposed between the screen 3 supported by the screen support unit having a moving mechanism for moving in the front-rear direction and the substrate support unit 2 and the screen 3. A moving body 4 including two transfer heads 6 and the like disposed along the direction of conveyance of the printed circuit board with the screen interposed therebetween, and screen recognition attached to the screen 3 A screen recognition camera for imaging the chromatography click, arranged above the screen 3 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. In addition, the substantially cylindrical support pins 12 that support the printed circuit board P from the lower surface by contacting the printed circuit board P are stored, and the support pins 12 are disposed at appropriate positions according to the printed circuit board P and can be moved in the Z direction. A backup table 2A, and a fixed chute 7A and a movable chute 7B (see FIG. 3), which are a pair of chutes 7 that sandwich and support the printed circuit board P from the side.

  The movable chute 7B is moved relative to the stationary chute 7A that does not move in accordance with the width size orthogonal to the conveyance direction of the printed circuit board P. This corresponds to the width size of the printed circuit board P to be handled. This corresponds to the width size of the printed circuit board P handled by moving the movable chute 7B with 7A as a reference side.

  The backup table 2A serves as both a stocker that stocks a plurality of support pins 12 that support the printed circuit board P from below and a support table that is supported by the support pins 12 provided on the lower surface of the printed circuit board P. Yes. 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.

  Thus, the stock area SA1 on the fixed chute 7A side that is the reference side of the front portion of the backup table 2A is an area outside the minimum size of the printed circuit board P, and the stock area SA1 is moved when the movable chute 7B is moved. This is to prevent the remaining support pin 12 from interfering 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.

  When the support pin 12 is pulled out from the support hole 13 established in the stock area SA1 by a transfer suction nozzle 24 described later, or when the support pin 12 is dropped onto the backup table 2A and transferred to the arrangement area after being pulled out. It may fall on the backup table 2A. For this reason, the fall prevention wall 33 which is a fall prevention member is erected on the peripheral part of the upper surface of the backup table 2A having a rectangular shape that prevents the dropped support pins 12 from rolling off the backup table 2A.

  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 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.

  The operation of the screen printing machine having the above configuration will be described below. 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 to which the stopper 27 is fixed is lowered by the cylinder 25. The printed circuit board P that has been transported and moved comes into contact with and is locked by the stopper 27 (see FIG. 2).

  At this time, when the optical sensor 29 detects the printed circuit board P, the backup table 2A is lifted while the printed circuit board P is supported with the fixed chute 7A and the movable chute 7B sandwiched from the side. The support pins 12 are horizontally supported (see FIG. 4). 2 and 4, only one support pin 12 is shown for convenience.

  Then, the screen recognition mark attached to the screen 3 is imaged by the screen recognition camera, and the substrate recognition mark attached to the printed circuit board P is imaged by the substrate recognition camera 5, and a recognition processing device (not shown) is used. These images are subjected to recognition processing, and both recognition processing results are sent to a control unit (not shown). Then, in the control unit, based on the recognition processing result, a position shift amount that should position the position of each substrate recognition mark and the position of each screen recognition mark relatively is calculated, and the calculation result is stored in the built-in storage unit. At the same time, the control unit controls the X-axis drive motor and the table θ-axis drive motor of the board support unit 2 and the Y-axis drive motor of the screen 3 based on the positional deviation amount, thereby The relative position shift of the screen 3 is corrected for positioning.

  Then, the substrate support unit 2 is further raised so that the printed circuit board P in a state of being horizontally 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 the squeegee (not shown) is creamed. The solder is printed on the printed circuit board P through the printed pattern holes of the screen 3, and after the printing is finished, the board support unit 2 is lowered and conveyed downstream from the backup table 2A.

  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 model switching of the printed circuit board P or the like. Along with this transfer operation, when the support pin 12 is pulled out from the support hole 13 established in the stock area SA1 by the transfer suction nozzle 24, it drops onto the backup table 2A, or after it is pulled out, it moves to the installation area. When mounting, it may come off the support hole 13 and fall onto the backup table 2A. Then, as shown in FIG. 3, since the support pin 12 has a substantially cylindrical shape, it rolls on the backup table 2A, but comes into contact with the fall prevention wall 33 erected on the peripheral edge of the upper surface of the backup table 2A. 2A is prevented from falling.

  As shown in FIGS. 5 and 6, the fall prevention wall 33A provided on one side along the fixed chute 7A near the reference side fixed chute 7A among the fall prevention walls 33 having a rectangular shape in plan view. May be formed higher than the other three sides. That is, the height of the fall prevention wall 33A from the upper surface of the backup table 2A is made the same as the height of the support pin 12 inserted into the support hole 13 from the upper surface of the backup table 2A.

  As described above, the fall prevention wall 33A is formed along the fixed chute 7A on one side near the fixed chute 7A on the reference side as described above in accordance with the width size orthogonal to the transport direction of the printed circuit board P. Thus, the movable chute 7B is moved far and near with respect to the fixed chute 7A on the reference side. When the backup table 2A is raised and the printed circuit board P is horizontally supported by the support pins 12, the fall prevention wall 3 is moved to another position. This is because the fall prevention wall may collide with the movable chute 7B if provided on three sides. Accordingly, even if the printed circuit board P to be handled is supported, a high fall prevention wall may be formed on the other two sides continuously with the high fall prevention wall 33A provided on at least one side as long as it does not collide. .

  As a result, as shown in FIG. 6, when the substrate support unit 2 is raised and the printed circuit board P is horizontally supported by the support pins 12, the drop occurs near the edge of the printed circuit board P that cannot be supported by the support pins 12. It can be supported by the prevention wall 33A, and the printed circuit board P can be supported horizontally. Therefore, the fall prevention wall 33A can have the same function as the support pin 12.

  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.

2 substrate support unit 2A backup table 3 screen 4 moving body 6 transfer head 7A fixed chute 7B movable chute 11 substrate transfer conveyor 12 support pin 24 transfer adsorption nozzles 33, 33A fall prevention wall

Claims (3)

  In a printed circuit board support apparatus for supporting a printed circuit board supported by a pair of conveyance chutes from below with a plurality of support pins arranged to be inserted into and removed from a support hole provided in a support table, from the support hole of the support table An apparatus for supporting a printed circuit board, comprising: a fall prevention member for preventing the detached support pin from falling from the support table.   In a printed circuit board support apparatus for supporting a printed circuit board supported by a pair of conveyance chutes from below with a plurality of support pins arranged to be inserted into and removed from a support hole provided in a support table, from the support hole of the support table An apparatus for supporting a printed circuit board, comprising: a fall prevention member provided on an outer peripheral edge of the support table for preventing the detached support pin from falling from the support table.   The conveyance chute includes a fixed chute and a movable chute, and the height of the fall prevention member near the fixed chute from the upper surface of the support table is defined as the height of the support pin inserted into the support hole from the upper surface of the support table. 3. The printed circuit board support device according to claim 1, wherein the printed circuit board support device is the same.

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