JP4450864B2 - Parts supply device - Google Patents

Description

  The present invention relates to a component supply apparatus that intermittently feeds a storage tape having electronic components mounted in a storage portion to a component pickup position by a servo motor.

This type of electronic component mounting apparatus is disclosed in, for example, Patent Document 1 and the like,
A servo motor is used as a drive motor to drive the stored tape, allowing arbitrary pitch feed, and a built-in printed circuit board with a drive circuit for driving the servo motor is built in the main body of the supply device. .

JP 2000-77892 A

  However, if the servo motor positioning loop is always applied and the servo is turned on (energized), the drive circuit generates a large amount of heat, creating a dilemma between the realization of a compact size and heat radiation design measures, and the printed circuit board and electronic component supply device. There was a limit to downsizing.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a component supply device that can suppress heat generation of a drive circuit as much as possible by energizing a servo motor only when necessary, and can reduce a printed circuit board on which the drive circuit is mounted. .

  Therefore, according to a first aspect of the present invention, there is provided a component supply device that intermittently feeds a storage tape having electronic components mounted in a storage portion to a component pickup position by a servo motor. A first control means for controlling to start driving of the servo motor by energizing the servo motor, and the servo motor after a predetermined time has elapsed after the servo motor is driven and rotated by a predetermined amount to complete positioning And a second control means for controlling so that the servo is turned off.

  According to a second aspect of the present invention, there is provided a component supply device that intermittently feeds a storage tape carrying electronic components in a storage portion to a component pick-up position by a servo motor via a drive circuit based on a component feed signal from the electronic component mounting device body First control means for controlling to start energization and start driving the servo motor, an encoder for detecting the rotation amount by driving the servo motor, and a detection signal indicating that the encoder has rotated a predetermined amount are input. A timer for measuring time from time to time, and a second control means for controlling the servo motor to be servo-off when a time-up signal resulting from the elapse of a predetermined time is input by the timer. .

  According to a third aspect of the present invention, there is provided a dual lane type component supply device capable of intermittently feeding each storage tape carrying electronic components in a storage unit to each component pickup position by each servo motor. Based on the first control means for energizing through the drive circuit to start driving one of the servo motors, and after the one servo motor is driven and rotated by a predetermined amount to complete the positioning. And second control means for controlling the servo motor to turn off the servo after a lapse of time.

  According to the present invention, it is possible to provide a component supply device that can suppress the heat generation of the drive circuit as much as possible by energizing the servo motor only when necessary, and can reduce the printed circuit board on which the drive circuit is mounted.

It is a top view of an electronic component mounting apparatus. It is a side view of a component supply unit. It is an enlarged view of a cover tape peeling mechanism. It is XX sectional drawing of FIG. It is a top view of a component supply unit. It is a partial cross section top view of a component supply unit. It is a partial side view of the feed mechanism of a component supply unit. It is AA sectional drawing of FIG. It is a control block diagram of an electronic component mounting apparatus. It is a timing chart figure in case the servo-off is carried out by time-up after completion of the feeding operation of lane A. FIG. 6 is a timing chart when the lane A servo signal is servo-off by the lane B feed signal input after the lane A feed operation is completed. It is a figure which shows a flowchart. It is a figure which shows the flowchart following the flowchart of FIG.

  Hereinafter, an electronic component mounting apparatus including a component supply apparatus and an electronic component mounting apparatus main body will be described with reference to the accompanying drawings. This electronic component mounting apparatus is a so-called multifunctional chip mounter, and various electronic components can be mounted on the printed circuit board P.

  FIG. 1 is a plan view of an electronic component mounting apparatus. An electronic component mounting apparatus main body 1 includes a machine base 2, a conveyor unit 3 extending in the left-right direction at the center of the machine base 2, and a front of the machine base 2. Two sets of component mounting portions 4 and 4 and two sets of component supply portions 5 and 5 are provided respectively at a portion (lower side in the drawing) and a rear portion (upper side in the drawing). The component supply unit 5 includes a plurality of component supply units 6, which are electronic component supply devices, which are detachably incorporated to form an electronic component mounting device.

  The conveyor unit 3 includes a central set table 8, a left supply conveyor 9, and a right discharge conveyor 10. The printed circuit board P is supplied from the supply conveyor 9 to the set table 8, and is fixedly set at a predetermined height so as to receive mounting of electronic components on the set table 8. And the board | substrate P by which mounting | wearing of the electronic component was completed is discharged | emitted to a downstream apparatus via the discharge conveyor 10 from the set table 8. FIG.

  Each component mounting portion 4 is provided with an XY stage 12 on which a head unit 13 is movably mounted, as well as a component recognition camera 14 and a nozzle stocker 15. The head unit 13 is equipped with two mounting heads 16 and 16 for sucking and mounting electronic components, and one substrate recognition camera 17 for recognizing the position of the printed circuit board P. Normally, the XY stages 12 and 12 of both the component mounting parts 4 and 4 are alternately operated.

  In each XY stage 12, the beam 12A is moved in the Y direction by the Y-axis motor, and the head unit 13 is moved in the X direction by the X-axis motor. As a result, the head unit 13 is moved in the XY direction.

  Each component supply unit 5 includes a number of component supply units 6 on a unit base 19 that are detachable side by side. Each component supply unit 6 is equipped with a storage tape C (described later) that stores a large number of electronic components at regular intervals. By intermittently feeding the storage tape C, a component mounting portion is provided from the tip of the component supply unit 6. One electronic component is supplied to 4 at a time. In the electronic component mounting apparatus main body 1, relatively small electronic components such as surface mount components are mainly supplied from the component supply unit 6, and relatively large electronic components are mainly supplied from a tray-type component supply device (not shown). Is done.

  The operation based on the mounting data stored in the storage unit of the electronic component mounting apparatus main body 1 is as follows. First, the XY stage 12 is driven and the head unit 13 is made to face the component supply unit 6. A desired electronic component is picked up by the suction nozzle 18. Subsequently, after the mounting head 16 is raised, the XY stage 12 is driven to move the electronic component to a position directly above the component recognition camera 14 to recognize the suction posture and the positional deviation with respect to the suction nozzle 18. Next, after the mounting head 16 is moved to the position of the board P on the set table 8 and the position of the board P is recognized by the board recognition camera 17, based on the recognition result by the component recognition camera 14 and the board recognition camera 17, The X-axis motor 12A, the Y-axis motor 12B of the XY stage 12 and the θ-axis motor 18A of the suction nozzle 18 are corrected and moved to mount the electronic component on the substrate P.

  Note that the XY stage 12 of the embodiment is equipped with two mounting heads (suction nozzles 18) 16 and 16, which continuously sucks two electronic components and mounts them on the substrate P continuously. It is also possible to do. Although not shown, when a mounting head having a plurality of suction nozzles is mounted, a plurality of electronic components can be continuously suctioned and mounted.

  Next, the component supply unit 6 which is a dual lane feeder will be described with reference to FIGS. The component supply unit 6 is configured so that electronic components can be separately and independently supplied from the two storage tapes C by two drive sources. The component supply unit 6 is an electronic unit that receives a unit frame 21, two storage tape reels (not shown) rotatably mounted on the unit frame 21, and a storage tape C that is sequentially drawn out while being wound around each storage tape reel. The two tape feeding mechanisms 22 intermittently feed to the pickup position (suction take-out position) of the parts, the two cover tape peeling mechanisms 23 that peel off the cover tape Ca of the storage tape C before the pickup position, and the pickup position. The two shutter mechanisms 24 that open the top of the electronic component and enable the electronic component to be picked up are configured.

  The storage tape C fed out from the storage tape reel is fed to the pickup position so as to dive under the suppressor 37 disposed in the tape path before the pickup position. The suppressor 37 has an opening 38 for pickup, and the shutter 77 of the shutter mechanism 24 is incorporated in this portion. In addition, a slit 39 is formed in the suppressor 37 located in front of the shutter 77, and the cover tape Ca of the storage tape C is peeled off from the slit 38, and the inside of the storage portion 65 of the cover tape peeling mechanism 23 described later. It is stored in. That is, the electronic component mounted on the storage tape C faces the shutter 77 that opens and closes the pickup opening 38 in a state where the cover tape Ca is peeled off. Reference numeral 40 denotes a suppressor presser that biases the suppressor 37 downward by a spring 40A.

  Next, the tape feeding mechanism 22 will be described with reference to FIGS. Each tape feeding mechanism 22 includes a servomotor 26 having a gear 25 on its output shaft and a reversible servomotor 26 and a gear 28 having a timing belt 27 stretched between the gear 25 at one end. 29 is provided with a rotating shaft 31 rotatably supported via a bearing 30 and a worm wheel 33 meshing with a worm gear 32 provided at an intermediate portion of the rotating shaft 31 and in a feed hole Cb formed in the storage tape C. It is composed of a sprocket 34 that meshes and sends it. The worm wheel 33 and the support shaft 35 of each sprocket 34 pass through the intermediate partition of the unit frame 21.

  Therefore, when one of the servo motors 26 is driven to rotate in order to supply the electronic components in one of the storage tapes C in the component supply unit 6, the gear 25 and the gear 28 are rotated via the timing belt 27. Only the rotary shaft 31 is rotated, and the sprocket 34 is intermittently rotated by a predetermined angle in the feed direction via the worm gear 32 and the worm wheel 33, whereby one storage tape C is intermittently fed through the feed hole Cb.

  The cover tape peeling mechanism 23 will be described with reference to FIGS. Each cover tape peeling mechanism 23 is supported by a support 44 fixed to the unit frame 21 with a drive motor 42 having a worm gear 41 on its output shaft, a gear 45 and a gear 43 meshing with the gear 41 around it. A first rotating body 46 that is rotatably supported via a shaft 46A, and a gear 47 that meshes with the contact portion 51 and the gear 45 around the periphery, and that is fixed to the unit frame 21 via a mounting body 48. The unit frame 21 includes a second rotating body 50 that is rotatably supported by the body 49 via a support shaft 50A, and an abutting portion 52 that is energized and abutted by the abutting portion 51 and a spring 55 around the second rotating body 50. A third rotating body 56 rotatably supported via a support shaft 56A by a mounting body 54 that is swingable via a support shaft 53, a roller 57 that guides the cover tape Ca, and a unit frame. The roller 21 is provided with a roller 60 for guiding the cover tape Ca guided by the roller 57 at the end of the mounting body 59 that can swing through the support shaft 58 and is biased by the spring 61 to the cover tape Ca. It is comprised from the tension application body 62 for applying a tension | tensile_strength. Reference numeral 63 denotes a stopper for restricting the swing of the mounting body 59.

  Therefore, when the cover tape Ca is peeled off, when the drive motor 42 is driven, the first rotating body 46 rotates via the gear 41 and the gear 43, and when the first rotating body 46 rotates, the gear 45 is rotated. And the second rotating body 50 rotates via the gear 47, and when the second rotating body 50 rotates, the contact portion 52 and the contact portion 51 urged by the spring 55 sandwich the cover tape Ca. The third rotating body 56 rotates in this state, and the cover tape Ca of the storage tape C is peeled off by one pitch from the slit 38 of the suppressor 37, and is provided at the end of the component supply unit 6 without causing slack. The storage unit 65 is stored.

  The shutter mechanism 24 includes a drive motor having an output shaft as a screw shaft, an operating body fixed to a nut body screwed to the screw shaft, and a groove into which a pin protruding from the operating body is fitted. It is formed of a shutter 77 provided on the suppressor 37 so as to be fitted on a guide groove provided on the suppressor 37 and slidably provided on the suppressor 37. Therefore, when the opening of the pickup 38 is opened and closed by the movement of the shutter 77, when the drive motor is driven, the nut body and the operating body screwed to the screw shaft move, and the fitting piece moves along the guide groove. By moving, the shutter 77 moves to open and close the opening 38.

  The shutter 77 closes the opening 38 so as not to jump out of the storage portion of the storage tape C from which the cover tape Ca has been peeled off when the electronic component sent to the pickup position is moved to the closed position. In the moved state, the electronic component is retracted from above so that the pickup by the suction nozzle 18 is possible.

  Reference numeral 66 denotes a power supply line for supplying power to the servo motor 26, the drive motor 42 and the like.

  Next, the mutual timing of feeding of the storage tape C, peeling of the cover tape Ca and opening / closing of the shutter 77 will be described. A CPU 80 of the electronic component mounting apparatus main body 1 to be described later corresponds to a predetermined predetermined component supply unit according to mounting data (data regarding which position, which direction on the printed circuit board and which electronic component is mounted) stored in the RAM 81. 6 tape feeding mechanism 22 is driven, and the storage tape C that stores a predetermined electronic component is intermittently fed once. That is, when one servo motor 26 is driven to rotate forward, the gear 25 and the gear 28 are rotated to rotate the rotating shaft 31, and the sprocket 34 is intermittently interrupted by a predetermined angle in the feed direction via the worm gear 32 and the worm wheel 33. By rotating, one storage tape C is intermittently fed through the feed hole Cb. At this time, since the other rotating shaft 31 does not rotate, the other storage tape C is not intermittently fed.

  When this tape feed mechanism 22 is driven, one corresponding cover tape peeling mechanism 23 peels (peels) the cover tape Ca for one intermittent feed in synchronism with this. Subsequently, when the tape feeding mechanism 22 and the cover tape peeling mechanism 23 are stopped, the shutter mechanism 24 is opened, and the shutter 77 is opened with respect to the electronic component fed to the pickup position.

  When the shutter 77 is opened, electronic components are picked up by the suction nozzle 18 and then the shutter 77 is closed. At the same time, the next intermittent feeding of the storage tape C and peeling of the cover tape Ca are performed. Is called.

  Next, a control block diagram of the electronic component mounting apparatus main body 1 and the component supply unit 6 of FIG. 9 will be described. Reference numeral 80 denotes a CPU as a control device that performs overall control of operations related to taking out and mounting of the electronic components of the electronic component mounting apparatus, 81 is a RAM (Random Access Memory) as a storage device, and 82 is a ROM (Read Only).・ Memory). Then, based on the data stored in the RAM 81, the CPU 80 operates in accordance with the program stored in the ROM 82 with respect to operations related to taking out and mounting the electronic component of the electronic component mounting apparatus via the interface 83 and the drive circuit 84. Oversee and control.

  In the RAM 81, for each step number (mounting order), mounting data including an X coordinate, a Y coordinate, a mounting angle, a component arrangement number in the component supply unit 5 and the like, an X size, a Y size, and a use suction for each electronic component are stored. Parts including the number of the nozzle 18 and the like are stored.

  A recognition processing device 85 is connected to the CPU 80 via an interface 83, and recognizes an image captured and captured by the component recognition camera 14 and an image captured and captured by the board recognition camera 17. Recognition processing is performed by the recognition processing device 85, and the processing result is sent to the CPU 80. That is, the CPU 80 outputs an instruction to the recognition processing device 85 to perform recognition processing (calculation of misalignment amount, etc.) on the image captured by the component recognition camera 14 or recognition processing of the image captured by the board recognition camera 17. In addition, the recognition processing result is received from the recognition processing device 85.

  That is, when the amount of positional deviation is grasped by the recognition processing of the recognition processing device 85, the result is sent to the CPU 80, and based on the component recognition processing and board recognition processing results, the CPU 80 performs the X-axis motor 12A and the Y-axis motor 12B. The suction nozzle 18 is moved in the X and Y directions by this driving, and is rotated by θ by the θ axis motor 18A, and the rotational angular position about the X and Y directions and the vertical axis is corrected.

  90 is a CPU mounted on a printed circuit board (not shown) built in the component supply unit 6, 91 is a RAM, 92 is a ROM, and 93 and 93 are connected to the CPU 90 via an interface 94. Reference numerals 95 and 95 denote encoders of the servo motors 26 and 26, respectively.

  With this configuration, description will be made based on the operation flowchart of the component supply unit 6 shown in FIGS. 12 and 13 and the timing chart based on FIGS. The CPU 90 of the component supply unit 6 performs initialization processing, outputs a ready signal (hereinafter referred to as “READY signal”) to the CPU 80 of the electronic component mounting apparatus body 1, and the component supply unit 6 performs the feeding operation of the storage tape C. The electronic component mounting apparatus main body 1 is informed that it is possible.

  The CPU 80 outputs a feed signal for one lane A of the component supply unit 6 which is, for example, a dual lane feeder in order to control the component feed operation of the component supply unit 6 based on the mounting data stored in the RAM 81. The CPU 90 that has input the feed signal for lane A stops outputting the READY signal, turns the servo motor 26 for lane A into the servo-on state (the servo motor 26 is energized) via the drive circuit 93, and The parts feeding operation of the storage tape C in the lane A is performed, and as described above, driving of one servo motor 26 is started, the gear 25 and the gear 28 are rotated, the rotating shaft 31 is rotated, and the worm gear 32 and the worm are driven. When the sprocket 34 rotates intermittently by a predetermined angle in the feed direction via the wheel 33, one of the storage tapes C is intermittently fed via the feed hole Cb. Note that the position of the servo motor 26 in the lane A is monitored by the encoder 95 even in the servo-off state of the lane A (the servo motor 26 is de-energized, that is, the servo motor 26 is de-energized). A delay timer, which will be described later, is established until the normal position feed is established by adding the deviation at the time of servo off to the predetermined amount of rotation after the servo is turned on, and after the normal position feed is completed. By delaying servo-off by 96, the positioning control of the servo motor 26 in lane A is maintained.

  When the servo motor 26 in the lane A is moved to a predetermined position by the encoder 95, the CPU 90 outputs a READY signal to the CPU 80 of the electronic component mounting apparatus body 1 based on the signal from the encoder 95, and the component supply unit. 6 notifies the electronic component mounting apparatus body 1 that the feeding operation of the storage tape C is possible. When the CPU 80 inputs a READY signal in the electronic component mounting apparatus body 1, the CPU 80 drives the XY stage 12 to drive the head unit 13. , The mounting head 16 is lowered and a desired electronic component is picked up by the suction nozzle 18.

  Further, as described above, the CPU 90 outputs the READY signal to the CPU 80 and starts the time measurement by the servo-off delay timer 96 to establish the normal position feed by the servo motor 26, and then the time required to complete the component suction. For example, the CPU 90 determines whether or not there is a lane B feed signal based on the mounting data from the CPU 80 if the slightly longer predetermined time is not up, and if there is a lane B feed signal, or for a predetermined time. If the time is up, the CPU 90 resets the delay timer 96 and controls the servo motor 26 in the lane A to be servo-off via the drive circuit 93 (see FIG. 12).

  Then, when the predetermined time by the delay timer 96 is not up and there is no lane B feed signal or when the servo motor 26 of lane A servo-off as described above, as shown in FIG. If the CPU 90 determines whether or not there is a lane B feed signal, the CPU 90 stops outputting the READY signal to the CPU 80, and the servo motor 26 of the lane B is servo-on via the drive circuit 93. The component feeding operation of the storage tape C of B is performed, and the other servomotor 26 is driven to rotate a predetermined amount to intermittently feed the other storage tape C. Even under the lane B servo-off state (the servo motor 26 is de-energized), the encoder 95 monitors the position of the lane B servo-motor 26, and the servo motor 26 in the lane B is rotated by a predetermined amount after the servo is turned on. The positional control of the servo motor 26 in the lane B is maintained until the normal position feed is established by adding the deviation, and the component suction in the lane A is completed.

  In this case, when the other servo motor 26 is moved to a predetermined position by the encoder 95, the CPU 90 outputs a READY signal to the CPU 80 based on a signal from the encoder 95. In the electronic component mounting apparatus main body 1, the CPU 80 When the signal is input, the CPU 80 causes the head unit 13 to face the lane B of the component supply unit 6, then lowers the mounting head 16 and picks up a desired electronic component by the suction nozzle 18.

  Further, as described above, the CPU 90 outputs a READY signal to the CPU 80 to start the time measurement by the servo-off delay timer 96, and the CPU 90 determines whether or not a predetermined time has elapsed. Then, the CPU 90 determines whether or not there is a lane A feed signal from the CPU 80 when the predetermined time is not up, and if there is a lane A feed signal or if the predetermined time is up, the CPU 90 The delay timer 96 is reset and the servo motor 26 in the lane B is controlled to be servo-off via the drive circuit 93 (see FIG. 13).

  When the predetermined time by the delay timer 96 is not up and there is no lane A feed signal or when the servo motor 26 of lane B is servo-off as described above, the lane A feed signal is shown in FIG. The CPU 90 determines whether or not there is, and is controlled as described above.

  As described above, according to the present embodiment, the servo motor 26 is energized only when necessary, thereby suppressing the heat generation of the drive circuit 93 and the printed circuit board on which the drive circuit 93 is mounted as much as possible. It is possible to provide a component supply apparatus that can reduce the size of the component.

  The electronic component mounting apparatus has been described by taking a so-called multi-function chip mounter as an example. However, the present invention is not limited to this and may be applied to a high-speed chip mounter such as a rotary table type.

  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. It encompasses alternatives, modifications or variations.

DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 5 Component supply part 6 Component supply unit 26 Servo motor 90 CPU
93 Drive circuit 95 Encoder 96 Delay timer

Claims (3)

  In a dual lane type component supply device that can intermittently feed each storage tape loaded with electronic components to the component pick-up position by each servo motor, via a drive circuit based on the component feed signal from the electronic component mounting device body The first control means for controlling the servo motor to be turned off and the other servo motor to be servo-off, and after the one servo motor is driven and rotated by a predetermined amount to complete positioning. And a second control means for controlling the one servo motor to turn off the servo after a predetermined time has elapsed.   In a dual lane type component supply device that can intermittently feed each storage tape loaded with electronic components to the component pickup position by each servo motor, based on the component feed signal of one lane from the electronic component mounting device body A first control means for controlling the servo motor to be turned off while energizing it via a drive circuit, and an encoder for detecting a rotation amount by driving the one servo motor; And a timer that counts the time from when a detection signal indicating that the encoder has rotated by a predetermined amount is input from the encoder and a time-up signal that is input when a predetermined time elapses by the timer, the one servo motor is servo-off. And a second control means for controlling as described above. That component supply device.   In a dual lane type component supply device that can intermittently feed each storage tape loaded with electronic components to the component pickup position by each servo motor, based on the component feed signal of one lane from the electronic component mounting device body First control means for controlling to start driving of one servo motor by energizing through a drive circuit, an encoder for detecting a rotation amount by driving the one servo motor, and a predetermined amount of rotation from the encoder A timer that counts the time from when the detection signal is input, and when the component feed signal of the other lane is input before the predetermined time elapses, the one servo motor is controlled to be servo-off. A component supply apparatus comprising: a second control unit.

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