JP3950144B2 - Parts supply method and apparatus - Google Patents

Description

  The present invention relates to a component supply method and apparatus for sequentially supplying components to a predetermined component extraction position in order to mount electronic components on a substrate in a mounting machine.

  2. Description of the Related Art Conventionally, as a component supply apparatus as described above, for example, a tape feeder that supplies components using a tape as a carrier is generally known.

  This tape feeder is composed of a tape body and a cover tape, and a tape containing a large number of parts at regular intervals is held in a state of being wound around a reel. Each time the parts are picked up by the nozzle member provided on the mounting machine head, the cover tape is peeled off from the tape body at the parts take-out section. While the tape is intermittently paid out by the mechanism, the parts are taken out one after another at the part taking-out part.

  As the feeding mechanism, the sprocket connected to the ratchet turning mechanism is engaged with the tape, and the ratchet turning mechanism is operated in accordance with the vertical movement of the nozzle member for picking up the parts, thereby rotating the sprocket. The method of paying out the tape was mainstream.

  In the method of feeding the tape by operating the ratchet rotation mechanism as the nozzle member moves up and down as described above, the tape is fed at a constant speed regardless of the type of parts. ) And the feeding speed may not be negligible depending on the type of the component stored on the tape. For example, in the case of a very small chip component or the like, there is a risk of causing the component to stand in the component storage unit.

  Therefore, the applicant considers that the tape is fed out by rotationally driving the sprocket by a motor, thereby changing the tape feeding operation according to the type of the part. However, when driving the sprocket with a motor, unlike the conventional one that forcibly positions the sprocket at a constant pitch by a ratchet, it is considered that the tape may shift in the longitudinal direction with respect to the part extraction part, This needs to be addressed.

  The present invention has been made to solve the above-described problem, and an object thereof is to appropriately supply components while feeding a tape by driving a motor.

In order to solve the above-described problems, the component supply method according to the present invention supplies a component while feeding the tape containing the component at predetermined intervals to the component take-out portion by rotating a sprocket that engages with the tape. in the component supply method of the sprockets were rotated by the motor, the forward rotation of the motor as well as deriving the tape to the component extracting unit, so as to count the pulse signals outputted in accordance with the rotation of the motor In addition, when a predetermined operating condition is established , the motor is rotated forward or backward to detect the specific position by a sensor capable of detecting the specific position in the rotation direction of the sprocket, and the pulse signal is detected at the time of detection. After resetting the count value to a predetermined value, the motor is driven in reverse so that the count value becomes the predetermined value. Define the position of the origin of the sprocket by stopping, in which to perform the positional adjustment of the tape relative to the component pickup portion by rotating drives the sprocket on the basis of the home position by the motor.

Hand, the component supply device according to the present invention, a tape accommodating the components at predetermined intervals, in the component supply apparatus for supplying parts while deriving the component extraction section by rotating the sprocket to be engaged with the tape A motor for rotationally driving the sprocket, a sensor capable of detecting a specific position in the rotational direction of the sprocket, and a control means for driving and controlling the motor. The control means guides the tape to the component take-out section. The motor is driven to rotate forward in order to output the pulse signal output along with the rotation of the motor, and when a predetermined operation condition is satisfied , the motor is driven forward or reversely to drive the motor. after the Ri by the sensor by detecting the specific position and resets the count value of the pulse signal when the detected predetermined value, the counter Constant because the position of the origin of the sprocket by the value stops reversed driving the motor so that the predetermined value, the tape with respect to the component pickup unit by driving the motor based on the home position It is comprised so that position adjustment may be performed .

  According to the component supply method and the component supply device of the present invention, the tape is fed out by rotating the sprocket by a motor, so that the tape feeding operation is changed according to the type of the component, etc. Parts can be supplied in operation. Further, if necessary, the motor can be rotated forward and backward to move the tape in the longitudinal direction with respect to the component extraction portion, whereby the components in the tape can be appropriately positioned with respect to the component extraction position. In particular, since the motor is driven and controlled based on the detection while detecting a specific position in the rotation direction of the sprocket by the sensor, the component in the tape can be accurately positioned with respect to the component take-out portion.

  Embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows the overall structure of a tape feeder as an application of the component supply apparatus of the present invention. In this figure, reference numeral 1 denotes a tape feeder main body, which is attached to a feeder installation base 18 in the mounting machine in a state where the front (right side in FIG. 1) is positioned by the pin member 2. A reel support shaft 3 and a reel presser 4 are provided behind the tape feeder main body 1. A reel 5 is rotatably attached to the reel support shaft 3, and a tape 6 containing a large number of small chip components is wound around the reel 5. The tape feeder main body 1 is configured by detachably connecting a front side portion 1a and a rear side portion 1b, and the front side portion 1a is equipped with a later-described component take-out portion 10 and the like. The reel 5 is held on the rear side portion 1b, and the rear side portion 1b is exchanged according to the size of the reel 5 or the like.

  A component take-out unit 10 is provided in front of the tape feeder 1, and the tape 6 led out from the reel 5 is connected to the component take-out unit 10 via a tape introduction guide unit 11 provided integrally with the tape feeder body 1. Led. Further, a tape feeding mechanism 12, a cover tape take-out mechanism 13, a tape body discharge guide portion 14, and the like, which will be described later, are provided at the front portion of the tape feeder body 1.

  As shown in FIGS. 2 and 3, the tape 6 led out from the reel 5 is composed of a tape body 6a and a cover tape 6b. In the tape body 6a, a large number of component storage portions 6c opened at the top are arranged at regular intervals, and the components 7 are stored in the respective component storage portions 6c. A large number of engagement holes 6d are arranged at regular intervals. The cover tape 6b is bonded to the upper surface of the tape 6a so as to close each component storage portion 6c of the tape body 6a from above.

  Then, the cover tape 6b is peeled off from the tape body 6a in the component take-out portion 10 so that the component 7 can be taken out, and the component suction nozzle member P (shown by a chain line in FIG. 1) mounted on the mounting machine. The component 7 is attracted and taken out by the tape feeding mechanism 12, and the tape 6 is fed out by a fixed amount.

  The tape feeding mechanism 12 (hereinafter, abbreviated as the feeding mechanism 12) includes a sprocket 21 positioned below the component take-out unit 10 and a gear 22 connected coaxially with the sprocket 21. The tape 6 is engaged with the engagement hole 6d of the tape 6 led to the above. The gear 22 is meshed with a worm gear 26 mounted on an output shaft of a servo motor 25 via a gear 23 and a worm wheel 24, and the sprocket 21 is rotated by the drive of the servo motor 25. 6 is to be paid out.

  The sprocket 21 has through holes 21a arranged in a circumferential direction at a predetermined interval corresponding to the component housing portion 6c of the tape 6, and the lower portion of the sprocket 21 detects the through hole 21a. An origin sensor 35 is attached. The origin sensor 35 is composed of a photosensor having a light irradiation part and a light receiving part with the sprocket 21 interposed therebetween, and the origin sensor 35 in which the irradiation light is received by the light receiving part through the through hole 21a. The component storage portion 6 c of the tape 6 is positioned at a predetermined component extraction position of the component extraction portion 10. A pulse plate 36 is attached to the output shaft of the servo motor 25, and a pulse generator 37 is provided corresponding to the pulse plate 36.

  The cover tape 6b separated from the tape body 6a by the component take-out part 10 is taken out by a cover take-off mechanism 13 (hereinafter abbreviated as take-out mechanism 13) and sent to a processing case (not shown). The cover tape 6b is peeled off from the tape 6a by the pulling force 13.

  As shown in FIG. 1, the take-up mechanism 13 includes a pair of gears 28 and 29 that are attached at positions slightly rearward of the motor 25. Then, the cover tape 6 b drawn from the component take-out portion 10 is guided between the gears 28 and 29 via the guide plate 30 and the guide rollers 31 and 32. One gear 28 meshes with a gear 27 that is coaxially connected to the worm wheel 24, so that the take-up mechanism 13 is synchronized with the feeding mechanism 12 by driving the servo motor 25. The cover tape 6b is pulled out by operating.

  2 and 3 show the structure of the component extraction unit 10. In these drawings, the component take-out unit 10 includes a tape guide groove 19 that opens upward in the upper part of the tape feeder main body 1 and a cover member 15 provided above the tape guide groove 19.

  The tape guide groove 19 is provided continuously to the tape introduction guide portion 11, and the tape 6 led out from the reel 5 and led to the component take-out portion 10 moves along the tape guide groove 19. It is like that.

  The cover member 15 is disposed above the tape passage portion along the tape guide groove 19, and the distal end of the cover member 15 (the right end in FIG. 3) and the proximal end of the tape body discharge guide portion 14 to be described later. An open part 17 for taking out parts is formed between the part 16 and the part 16. Then, after the cover 6b is peeled off at the front end position of the cover member 15, when the component storage portion 6c of the tape body 6a reaches the position of the opening portion 17, the component storage portion 6c is opened upward, and the nozzle The component 7 can be taken out from above by the member P.

  A tape body discharge guide portion 14 connected to the tape guide groove 19 is provided at the tip of the tape feeder main body 1, and the used tape body 6a having passed through the component take-out portion 10 is used for this tape discharge. Via the guide portion 14, the cover tape 6b taken by the take-up mechanism 13 is sent to a processing case or the like not shown.

  A controller 40 for driving and controlling the tape feeder is mounted in a substantially middle portion of the tape feeder main body 1. The controller 40 has a configuration as shown in the block diagram of FIG.

  That is, the controller 40 has main control means (CPU) 41 connected to the host computer of the mounting machine body, and the servo motor 25 is connected to the main control means 41 via the driver 44. The servo motor 25 is driven and controlled by the main control means 41. The main control means 41 is connected to the pulse generator 37 so that the output value thereof is input, whereby the drive of the servo motor 25 is feedback-controlled.

  The controller 40 is further provided with operating condition setting means 42 and condition storage means 43, which are connected to the main control means 41, respectively.

  The operating condition setting means 42 sets operating conditions of the feeding mechanism 12 suitable for the parts to be supplied. That is, during the feeding operation of the tape 6, when the tape 6 is fed so that the component 7 does not stand up in the component housing portion 6c or the component 7 does not jump out of the component housing portion 6c via the opening portion 17. The operation conditions such as acceleration, maximum speed, and deceleration of the servo motor 25 are set. The setting of such operating conditions is performed by operating condition construction data stored in advance in the host computer of the mounting machine body, that is, data such as the type of component and the maximum feeding speed and acceleration / deceleration of the tape 6 suitable for the type. This is usually performed before the operation of the tape feeder or every time the tape is replaced. The obtained operating conditions are stored in the condition storage means 43 in an updated manner, and the servomotor 25 is driven and controlled based on the operation conditions stored in the condition storage means 43 during mounting. It has become.

  Further, the origin sensor 35 is connected to the main control means 41, and when a predetermined operation condition is established such as when the tape feeder is operated or when the tape is replaced, the output of the origin sensor 35 is set as described later. Based on the origin position movement process, that is, the feeding mechanism 12 is operated to position the component storage portion 6c at a predetermined component extraction position of the component extraction portion 10.

  Next, a control example of the tape feeder configured as described above will be described with reference to the flowcharts of FIGS.

  FIG. 5 shows a main routine of component supply control by the tape feeder. In this figure, when the tape feeder is operated, initial processing is first performed, and a command input standby state from the host computer of the mounting machine main body is entered (step S1).

  Then, when a command is input, it is determined whether or not the command is a command requesting the origin position movement process of the tape 6 (steps S2 and S3). Processing (step S7) is performed, and then the process proceeds to step S10. In step S10, an end message is transmitted to the host computer, and then the process returns to step S2.

  If NO in step S3, it is then determined whether or not the command is a command requesting setting of an operating condition (step S4). If YES in this case, an operating condition setting process (described later) ( Step S8) is performed, and then the process proceeds to step S10.

  If NO in step S4, it is further determined whether or not the command is a command requesting feeding of the tape 6 (step S5). If YES, the tape feeding process (step S9) described later is performed. Then, the process proceeds to step S10.

  If NO in step S5, it is determined that there is no processing corresponding to the command, an abnormal message is transmitted to the host computer, and the process returns to step S2.

  FIG. 6 is a flowchart showing the origin position movement process in step S7.

  In this process, it is first determined whether or not the origin sensor 35 is on (step S20). Here, when the origin sensor 35 is on, the servo motor 25 is driven in the reverse direction, that is, the direction in which the tape 6 is moved in the direction opposite to the feeding (a method of rotating the sprocket 21 counterclockwise in FIG. 1). The servo motor 25 is driven at a low speed (step S25).

  On the other hand, when the servo motor 25 is off, the servo motor 25 is driven in the normal direction, that is, the servo motor 25 is driven at a low speed in the direction in which the tape 6 is fed (in FIG. 1, the method of rotating the sprocket 21 clockwise). The servo motor 25 is driven until 35 is turned on (steps S21 and S22).

  When the origin sensor 35 is turned on, the counter that counts the output pulses from the pulse generator 37 at that time is reset to “0” and the servo motor 25 is stopped (step S23). Then, after the servo motor 25 is stopped, the servo motor 25 is reversely rotated again and stopped so that the counter becomes “0”, whereby the tape 6 is positioned at the origin position.

  That is, in the tape feeder, when the origin sensor 35 is on, the tape 6 is positioned at the origin position, that is, the component storage portion 6c of the tape 6 is positioned at a predetermined component extraction position of the component extraction portion 10. However, since there is a width (error) within the range of the through hole 21a in the ON state of the origin sensor 35, there may be a deviation between the tape 6 and the component pick-up position within this range. Therefore, as described above, the time point when the origin sensor 35 is switched from OFF to ON is detected, and this position is set as the origin position, so that the positioning accuracy of the tape 6 (component storage portion 6c) to a predetermined component removal position can be increased. It comes to secure.

  In addition, after resetting the counter in step S23, in step S24, the servomotor 25 is reversely driven again so that the counter becomes “0”. Positioning error does not occur.

  FIG. 7 is a flowchart showing the operating condition setting process in step S8.

  In this process, first, a request command for operating condition construction data is output from the controller 40 of the tape feeder to the host computer of the mounting machine body, and in response to this, the tape 6 is fed out in accordance with the parts to be supplied from the host computer. Data such as speed, maximum feeding acceleration / deceleration, feeding amount of the tape 6 and the like are output to the controller 40 (step S30).

  Based on the operating condition construction data, the operating condition setting means 42 obtains the operating condition of the servo motor 25, that is, the driving pattern by the servo motor 25 such as acceleration → low speed movement → deceleration, and this is stored in the condition storage means 43. (Step S31).

  FIG. 8 is a flowchart showing the tape feeding process in step S9.

  In this process, the feeding mechanism 12 is operated based on the operating condition set in step S8, and the tape 6 is fed out.

  Specifically, after the servo motor 25 is driven at a predetermined acceleration, the servo motor 25 is driven at a constant speed, and when the servo motor 25 reaches a predetermined deceleration position, the servo motor 25 is decelerated, and the target position, that is, the next component storage unit 6c is moved to the component extraction unit. When the predetermined part removal position of 10 is reached (steps S41 to S45). Thereby, the feeding operation of the tape 6 by the tape feeder is completed.

  Each time a part is taken out by the nozzle member P, a command requesting the feeding of the tape 6 is output from the host computer of the mounting machine body, whereby step S2 (YES) of the main routine shown in FIG. → S3 (NO) → S4 (NO) → S5 (YES) → S9 → S10 → S2 is repeatedly performed, whereby parts are continuously supplied from the tape feeder.

  As described above, the tape feeder is suitable for the type of the component so that the component 7 does not stand up in the component storage portion 6c when the tape 6 is fed out or the component 7 does not jump out of the component storage portion 6c. The operating conditions such as the feeding speed are set in advance, and during the mounting operation, the feeding mechanism 12 is operated based on the operating conditions so that the tape 6 is fed out. Compared with a conventional tape feeder in which the tape is fed out under certain conditions, it is possible to reliably prevent the occurrence of component standing and supply components in a better state. Therefore, the above operating conditions are set for each type of component even when supplying a wide variety of components with different sizes and configurations from a relatively large chip component to a very small chip component with a single tape feeder. Thus, the parts can be supplied satisfactorily.

  In addition, since the operation mechanism suitable for the parts is set and the feeding mechanism 12 is operated, the parts can be prevented from popping out without providing the shutter member, resulting in malfunction of the shutter member. There is also an advantage that the concern that causes the defective component supply is eliminated, and the structure of the component extraction unit 10 can be simplified.

  Further, in the tape feeder, the component storage portion 6c of the tape 6 is positioned at a predetermined component extraction position of the component extraction portion 10 by detecting the through hole 21a of the sprocket 21 by the origin sensor 35. When the tape is exchanged, etc., an origin position movement process is executed in which the switching position (switching position from OFF to ON) of the detection state of the through hole 21a by the origin sensor 35 is detected and this position is detected as the origin position. Since the servo motor 25 is driven and controlled based on the origin position, the origin sensor 35 is free from detection errors within the range of the through hole 21a. There is also an advantage that positioning can be performed with high accuracy with respect to ten predetermined component extraction positions.

  The tape feeder of the above embodiment is an example of a component supply apparatus according to the present invention, and the specific structure and the like can be appropriately changed without departing from the gist of the present invention. For example, in the above embodiment, the controller 40 is mounted on the tape feeder main body 1 and the tape feeder is driven and controlled by the controller 40. However, only the driver of the servo motor 25 is mounted on the tape feeder main body 1. The tape feeder may be controlled by the host computer of the mounting machine body. In this case, the host computer may be provided with a function corresponding to the operation condition setting means 42.

  In the above embodiment, the operating condition construction data is output from the host computer of the mounting machine main body to the controller 40 mounted on the tape feeder main body 1, and the operating conditions are set by the controller 40. The operating conditions may be set on the side and output to the controller 40.

It is a schematic block diagram which shows the tape feeder which is the components supply apparatus which concerns on this invention. It is a plane schematic diagram which shows the components extraction part of the said tape feeder. It is a cross-sectional schematic diagram which shows the components extraction part of the said tape feeder. It is a block diagram which shows the control system of the said tape feeder. It is a flowchart (main routine) which shows the example of control of the said tape feeder. It is a flowchart (subroutine; origin position movement process) which shows the example of control of the said tape feeder. It is a flowchart (subroutine; operation condition setting process) which shows the example of control of the said tape feeder. It is a flowchart (subroutine; tape feeding process) which shows the example of control of the said tape feeder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tape feeder main body 5 Reel 6 Tape 6a Tape main body 6b Cover tape 6c Parts storage part 7 Parts 10 Part taking-out part 12 Tape feeding mechanism 13 Tape taking-out mechanism 25 Servo motor 35 Origin sensor 36 Pulse plate 37 Pulse generator 40 Controller 41 Main control Means 42 Operating condition setting means 43 Condition storage means 44 Driver

Claims (2)

In a component supply method for supplying a component while deriving a tape containing components at predetermined intervals to a component take-out portion by rotating a sprocket that engages with the tape,
The sprocket rotationally driven by a motor, the forward rotation of the motor as well as deriving the tape to the component extracting unit, leave to count pulse signals outputted in accordance with the rotation of the motor, a predetermined operating condition There when satisfied, a predetermined value a count value of said pulse signal when the detection to the detection of the specific position by the detection sensor capable of a specific position in the rotating direction of the sprocket to forward or reverse drive the motor after resetting, the count value of the motor reverse rotation to such a predetermined value defining a home position of the sprocket by stopping, by rotationally driving the sprocket on the basis of the home position by the motor A component supply method comprising adjusting the position of a tape with respect to the component extraction unit. In a component supply device for supplying a component while deriving a tape containing components at predetermined intervals to a component take-out portion by rotating a sprocket that engages with the tape,
A motor for rotationally driving the sprocket;
A sensor capable of detecting a specific position in the rotational direction of the sprocket;
Control means for driving and controlling the motor,
The control means drives the motor in the forward direction so as to lead the tape to the component take-out section, and counts a pulse signal output with the rotation of the motor, when a predetermined operating condition is satisfied. after resetting the count value of said pulse signal said motor forward or reverse drive to the to detect the by Ri the specific position in the sensor when the detected predetermined value, the count value becomes the predetermined value characterized by adjusting the position of the tape the motor constant because the home position of the sprocket by the reverse rotation drive to be stopped, with respect to the component pickup unit by driving the motor based on the origin position as A parts supply device.

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