JP6227331B2 - Electronic component supply apparatus and electronic component supply method - Google Patents

Description

  The present invention relates to an electronic component supply apparatus that intermittently feeds a storage tape having electronic components mounted in a storage unit to a component pickup position.

Conventionally, in this type of electronic component supply device, progress has been made from a mechanical type to a self-propelled intelligent supply device with a built-in drive motor. The advantages are “high speed supply”, “silence”, “feed pitch free”, “variable speed arbitrarily”, and the like.
Furthermore, development is accelerating from single lane feeders to dual lane feeders and triple lane feeders in order to increase the component mounting density, guided by the specifications of the main body of the device that competes for the number of components.
However, in a dual lane feeder or a triple lane feeder, providing a dedicated tape feeding drive motor for each lane is in a trade-off relationship with the miniaturization design orientation of the component supply device itself. Still further, there are technical and productive difficulties in how to install the drive source within the limited volume of the body of the component supply device, leading to higher prices for the supply device.

For example, Patent Document 1 is an electronic component supply device of a dual lane feeder that intermittently feeds a storage tape having electronic components mounted in a storage unit to a component pickup position. Patent Document 1 includes a drive motor that can rotate forward and backward, each rotary shaft that is rotatably supported by each support body, and a worm wheel that meshes with a worm gear provided on each rotary shaft. Along with them, each sprocket that meshes with and feeds a feed hole formed in the storage tape, and a rotation that is provided between the output shaft of the drive motor and each rotary shaft and that transmits from the output shaft to each rotary shaft. And a gear having a reverse direction.
And in this patent document 1, the gear was provided in the output shaft of the said drive motor, and each one gear was each equipped with the one-way clutch, and each gear geared with each said gear was provided in one end part, and was supported by each support body rotatably. Each rotary shaft is provided with a worm wheel that meshes with a worm gear provided on each rotary shaft. Moreover, each one-way clutch reverses the direction in which each rotating shaft is rotated.

Japanese Patent Laid-Open No. 2004-235531

In the above-mentioned Patent Document 1, there is a play (lag angle) until the one-way clutch is engaged, so that the feed amount varies every time the driving direction is changed from forward rotation to reverse rotation, or from reverse rotation to normal rotation, and the supply tape is accurately fed. There was a problem that could not be.
In the present invention, an encoder is provided on the drive shaft as a feed mechanism for driving the supply tape, and the amount of delay generated until the one-way clutch is engaged by the delay angle, that is, the drive direction is changed from forward rotation to reverse rotation, or from reverse rotation to normal rotation. It is an object of the present invention to provide a component supply apparatus and a component supply method capable of correcting a delay amount variation that occurs each time and accurately feeding a supply tape.

  In order to solve the above-described problems, an electronic component supply device according to the present invention is an electronic component supply device that intermittently feeds a storage tape having an electronic component mounted in a storage unit to a component pickup position. And a drive motor capable of forward and reverse rotation, and a second gear which is respectively provided with a one-way clutch and meshes with the first gear at one end, and is rotatably supported by each support body. Two rotating shafts, two sprockets each having a worm wheel that meshes with a worm gear provided on each of the rotating shafts and meshed with a feeding hole formed in the storage tape, and the two rotating shafts or An encoder provided on one of the second gears, and each of the one-way clutches is configured so that the drive motor is either forward or reverse. When moving, the first gear and both second gears are rotated to rotate one of the rotating shafts, and the corresponding sprocket is intermittently moved in the feeding direction of the storage tape via the corresponding worm gear and worm wheel. When the rotation axis is rotated but the other rotation axis is not rotated and the directions allowing the rotation of both rotation axes are opposite to each other, and the drive motor rotates in the rotation direction opposite to the previous time, The first feature is that the drive of the drive motor is stopped when the position of the rotary shaft detected by the encoder reaches a predetermined amount.

  In order to solve the above-described problems, an electronic component supply device according to the present invention includes an electronic component supply device that intermittently feeds a storage tape having an electronic component mounted in a storage portion to a component pickup position. A drive motor capable of forward / reverse rotation provided with two first gears each having a one-way clutch, and a second gear meshing with each of the first gears, are rotatably supported by respective supports. Two sprockets, two sprockets each having a worm wheel that meshes with a worm gear provided on each of the rotation shafts and meshing with a feed hole formed in the storage tape, and the second gear or An encoder provided on one of the two rotating shafts, and each of the one-way clutches has a forward and reverse driving motor. When one of the first and second gears is rotated and one of the rotating shafts is rotated to drive the corresponding sprocket via the corresponding worm gear and the worm wheel when driven. However, the other rotating shaft is prevented from rotating and the directions allowing the rotation of both rotating shafts are opposite to each other, and the drive motor rotates in the direction opposite to the previous rotation. In this case, the second feature is that the drive of the drive motor is stopped when the position of the rotary shaft detected by the encoder reaches a predetermined amount.

  Furthermore, in order to solve the above-described problem, an electronic component supply method according to the present invention includes a drive motor capable of forward / reverse rotation provided with one first gear on an output shaft, and a one-way clutch therein, respectively. A second gear that meshes with each of the first gears is provided at one end, and two rotary shafts that are rotatably supported by the respective support members, and a worm wheel that meshes with a worm gear provided on each of the rotary shafts. And two sprockets that mesh with and feed the feed hole formed in the storage tape, and an encoder provided on either of the two rotary shafts or the second gear, and has an electronic component mounted on the storage unit. In an electronic component supply method of an electronic component supply device that intermittently feeds a storage tape to a component pickup position, the electronic component mounting incorporating the electronic component supply device When a tape feed command is issued from the device, a tape feed direction confirmation step for checking whether the tape feed direction is the same as or the same lane as the previous feed direction, and the tape feed direction is the previous feed direction. And the first feed operation step for rotating the drive motor by the predetermined amount in the immediately preceding rotation direction, and the tape feed direction is different from the immediately preceding feed direction. An encoder detection step for determining whether or not the output data of the encoder has rotated to a predetermined rotation amount when the lanes are different from each other, and rotation of the drive motor when rotating to the predetermined rotation amount The third feature is to stop the operation.

  According to the present invention, the play (lag angle) until the one-way clutch is engaged is corrected, and the supply tape can be accurately fed even if the driving direction is changed from forward rotation to reverse rotation or from reverse rotation to normal rotation. A supply device and a component supply method can be realized.

It is a top view of an electronic component mounting apparatus. It is a side view of a component supply apparatus. 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 apparatus. It is a partial cross section top view of a components supply apparatus. It is a partial side view of the feed mechanism of a component supply apparatus. It is AA sectional drawing of FIG. It is a control block diagram of an electronic component mounting apparatus. It is a flowchart of the tape feeding control of a dual lane feeder. 4 is a block diagram showing a relationship between a driver unit 71, an encoder 70, and a drive motor 26 provided in the component supply device 6. FIG. It is a partial side view of the feed mechanism of the component supply apparatus which concerns on 2nd Embodiment. It is a partial side view of the feed mechanism of the component supply apparatus which concerns on 3rd Embodiment. It is a partial side view of the feed mechanism of the component supply apparatus which concerns on 3rd Embodiment.

Hereinafter, an electronic component mounting apparatus to which an electronic component supply apparatus according to an embodiment of the present invention is applied will be described with reference to the accompanying drawings. This electronic component mounting apparatus is a so-called multifunctional chip mounter, and can mount various electronic components on a printed board.
In the description of each drawing, components having common functions are denoted by the same reference numerals, and overlapping description is avoided as much as possible.

FIG. 1 is a plan view of the electronic component mounting apparatus. The electronic component mounting apparatus 1 includes a machine base 2, a conveyor unit 3, two sets of component mounting units 4, and two sets of component supply units 5.
The conveyor unit 3 extends in the left-right direction at the center of the machine base 2, and two sets of component mounting units 4 and two sets of component supply units 5 are a front part (lower side in the drawing) and a rear part of the machine base 2. (On the upper side in the figure). A plurality of component supply devices 6 which are electronic component supply devices are detachably incorporated in the component supply unit 5.

  The conveyor unit 3 has a central set table 8, a supply conveyor 9 on the left (upstream) side, and a discharge conveyor 10 on the right (downstream) side. 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 sets of mounting heads 16 for sucking and mounting electronic components and one substrate recognition camera 17 for recognizing the substrate P. In addition, normally, each XY stage 12 of both the component mounting parts 4 becomes an alternating operation.

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

  Each component supply unit 5 includes a large number of component supply devices 6 on a unit base 19 so as to be detachable side by side. Each component supply unit 5 is mounted with a storage tape C (described later) in which a large number of electronic components are stored at regular intervals. By intermittently feeding the storage tape C, the component mounting unit 6 starts from the tip of the component supply device 6. One electronic component is supplied to 4 at a time. In this electronic component mounting apparatus 1, relatively small electronic components such as surface mount components are mainly supplied from the component supply device 6, and relatively large electronic components are mainly supplied from a tray-type component supply device (not shown). The

The electronic component mounting apparatus 1 is operated based on mounting data stored in the storage unit.
In the operation for mounting the electronic component, first, the XY stage 12 is driven to move the head unit 13 to a position immediately above the component take-out port of the component supply device 6, and then the mounting head 16 is moved down by the suction nozzle 18. Pick up the desired electronic component. 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, the XY stage is based on the recognition results by the component recognition camera 14 and the board recognition camera 7. The 12 X-axis motors, the Y-axis motors, and the θ-axis motor of the suction nozzle 18 are corrected and moved to mount the electronic component A on the board P.

  Note that the XY stage 12 of the embodiment is equipped with two mounting heads 16 each equipped with a suction nozzle 18, and continuously sucks two electronic components, which are continuously attached to the substrate P. It is also possible to install. Although not shown, when a mounting head having a plurality of suction nozzles is mounted, a plurality of electronic components can be sequentially suctioned and mounted.

  Next, based on FIG. 2 thru | or FIG. 8, the component supply apparatus 6 which is a dual lane feeder is demonstrated. FIG. 2 is a side view of the component supply apparatus. FIG. 3 is an enlarged view of the cover tape peeling mechanism. 4 is a cross-sectional view taken along line XX in FIG. FIG. 5 is a plan view of the component supply apparatus. FIG. 6 is a partial cross-sectional plan view of the component supply apparatus. FIG. 7 is a partial side view of the feeding mechanism of the component supply device. 8 is a cross-sectional view taken along the line AA in FIG. For convenience of explanation, the encoder of the present invention is not shown in FIGS. 2 to 6 and 8.

The component supply device 6 is a dual lane feeder, and is configured so that electronic components can be separately and independently supplied from two storage tapes C by one drive source.
The component supply device 6 includes a unit frame 21, a tape feeding mechanism 22, a cover tape peeling mechanism 23, a shutter mechanism 24, a driver unit 71, and a control unit 69 that controls the component supply device 6. Since the tape feeding mechanism 22, the cover tape peeling mechanism 23, and the shutter mechanism 24 are dual lane feeders, two each are provided.
Two storage tape reels (not shown) are rotatably mounted on the unit frame 21. Each of the tape feeding mechanisms 22 intermittently feeds the storage tape C sequentially fed from the state wound around each storage tape reel to the pickup position (suction pickup position) of the electronic component. Each of the cover tape peeling mechanisms 23 peels off the cover tape Ca of the storage tape C before the pickup position. Each of the shutter mechanisms 24 opens the electronic component sent to the pickup position and enables the electronic component A to be picked up. Further, the driver unit 71 drives the tape feeding mechanism 22, the cover tape peeling mechanism 23, and the shutter mechanism 24 in either lane according to control from the electronic component mounting apparatus 1, and the storage tape on the driven side. Let the tape feed. An external or built-in memory is attached to the driver unit 71 and stores information from the encoder.

  In this document, in the component supply apparatus 6 that is a dual lane feeder, for example, the back side in FIG. 2 is referred to as A lane and the near side is referred to as B lane. In addition, in the figure of the component supply apparatus 6 seen from one side, such as FIG. 2, the A lane side is hardly shown. Since the description of the component supply apparatus is almost the same for both lanes AB, the operation and configuration of one lane will be described in the following description unless otherwise emphasized.

Now, the storage tape C fed out from the storage tape reel is fed to the pickup position so as to lie under the suppressor 37 (see FIG. 5) disposed in the tape path before the pickup position. The suppressor 37 has an opening 38 for pickup, and a shutter 77 of the shutter mechanism 24 described later is incorporated in this portion.
Further, the suppressor 37 is formed with a slit 39 located in front of the shutter 77, and the cover tape Ca of the storage tape C is peeled off from the slit 39, and the storage portion 65 of the cover tape peeling mechanism 23 described later. Stored inside. That is, the electronic component A 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. The tape feed mechanism 22 includes a drive motor 26, a spur gear 25, a gear 28, a support 29, a bearing 30, a rotating shaft 31, a worm gear 32, a worm wheel 33, and a sprocket 34.

In the tape feeding mechanism 22, the drive motor 26 is a servo motor capable of forward / reverse rotation provided with a spur gear (first gear) 25 at one end of its output shaft. The gear 25 meshes with two gears (second gears) 28 each having a one-way clutch 27 therein.
The two gears 28 for the A lane and the B lane each include a one-way clutch 27 inside. The two one-way clutches 27 each have an inner ring and an outer ring, and the meshing directions are reversed for the A lane and the B lane. The outer ring of each one-way clutch 27 is fixed to the gear 28, and the inner ring is fixed to the rotating shaft 31. For example, when the drive motor 26 rotates forward (rotates clockwise), the one-way clutch 27 of the A-lane gear 28 idles and the one-way clutch 27 of the B-lane gear 28 meshes. Conversely, when the drive motor 26 rotates in the reverse direction (rotates counterclockwise), the one-way clutch 27 of the gear 28 for the B lane idles and the one-way clutch 27 of the gear 28 for the A lane engages.

  The rotating shaft 31 is rotatably supported by bearings 30 on the A-lane and B-lane supports 29, and a worm gear 32 is attached to an intermediate portion of the shaft. Further, the rotary shaft 31 is provided with the gear 25 described above, and meshes with the spur gear 25 provided on the output shaft of the drive motor 26. In this embodiment, the rotational force of the drive motor is transmitted by meshing between the gears, but it is obvious that other transmission means such as transmission by a belt may be used.

Further, the worm gear 32 provided at the intermediate portion of each rotating shaft 31 meshes with the worm wheels 33 provided on the two sprockets 34 for the A lane and B lane, respectively, According to the rotation of the shaft 31, it rotates by a predetermined angle in the feed direction. By this rotation, the teeth on the outside of the sprocket 34 are engaged with the feed hole Cb formed in the storage tape C, and the tape is fed.
The worm wheel 33 and the support shaft 35 of each sprocket 34 pass through the intermediate partition 21A of the unit frame 21.
The A lane and B lane rotary shafts 31 are each provided with an encoder 70 to detect the amount of rotation of the rotary shaft 31.

The one-way clutch 27 enables the rotation shaft 31 to rotate along with the rotation of the gear 28 rotating in one direction, but makes each gear 28 idle in the reverse direction and disables the rotation operation.
Therefore, in the dual lane feeder (component supply device 6) of the present invention, the one-way clutch 27 provided for each of the two lanes rotates one rotating shaft 31 when the drive motor 26 is driven, The rotating shaft 31 is disposed so as not to rotate, and the directions in which the rotating shafts 31 are allowed to rotate are opposite to each other.
For example, when the drive motor 26 rotates forward (rotates clockwise), the spur gear 25 rotates. At this time, the one-way clutch 27 provided in the gear 28 of the B lane rotates and rotates the gear 28 of the B lane. However, since the one-way clutch 27 provided in the A lane gear 28 does not rotate, the A lane gear 28 does not rotate.
Similarly, when the drive motor 26 reverses (rotates counterclockwise), the spur gear 25 rotates. At this time, the one-way clutch 27 provided in the gear 28 of the A lane rotates and rotates the spur gear 25 of the A lane. However, since the one-way clutch 27 provided in the gear 28 of the B lane does not rotate, the spur gear 25 of the B lane does not rotate.

That is, when the drive motor 26 is driven to rotate forward for a predetermined time in order to supply the electronic components in the storage tape C of the B lane in the component supply device 6, the spur gear 25 rotates and engages with the A lane and B engaged with the spur gear 25. An attempt is made to rotate the gear 28 of each lane. However, the one-way clutch 27 does not rotate the A lane gear 28 but only the B lane gear 28. Accordingly, only the rotation axis 31 of the B lane rotates. In the rotating B lane, the sprocket 34 rotates intermittently by a predetermined angle in the feed direction via the worm gear 32 and the worm wheel 33. Accordingly, the storage tape C in the B lane is intermittently fed through the feed hole Cb, and the rotation shaft 31 of the A lane does not rotate, so that the storage tape C in the left lane is not intermittently fed.
Conversely, when the drive motor 26 is reversely driven for a predetermined time to supply the electronic components in the storage tape C of the A lane in the component supply device 6, the spur gear 25 rotates and the A lane meshed with the spur gear 25 and An attempt is made to rotate the gear 28 in each of the B lanes. However, the one-way clutch 27 does not rotate the B-lane gear 28, but only the A-lane gear 28 rotates. Accordingly, only the rotation shaft 31 of the A lane rotates. In the rotating A lane, the sprocket 34 rotates intermittently at a predetermined angle in the feed direction via the worm gear 32 and the worm wheel 33. Accordingly, the storage tape C of the A lane is intermittently fed through the feed hole Cb, and the rotation shaft 31 of the B lane does not rotate, so that the storage tape C of the left lane is not intermittently fed.
Each sprocket 34 is provided so as to rotate forward according to the rotation of the rotating shaft 31. That is, in both the A lane and the B lane, the tape is intermittently fed in the direction of feeding to the opening 38 for taking out the electronic component.

However, the one-way clutch 27 generates a difference between the rotation angle of the output shaft and the rotation angle of the output shaft, that is, a so-called delay angle.
Due to the delay angle, even if the drive motor 26 is driven by a predetermined amount, the one rotary shaft 31 that can be rotated by the one-way clutch 27 does not rotate by a predetermined amount. Accordingly, the sprocket 34 to which the rotational force is transmitted from the one-way clutch 27 via the worm gear 32 and the worm wheel 33 does not rotate at a necessary predetermined amount. Therefore, when the one-way clutch 27 is used, it is necessary to eliminate the influence of the delay angle.

In order to eliminate the influence of the delay angle, in the present invention, an encoder 70 is provided on the rotating shaft 31 as shown in FIG. Thus, the rotational position of the rotary shaft 31 that can be rotated by the one-way clutch 27 is detected when the drive motor 26 is rotationally driven by a predetermined amount.
As will be described later, the component supply device of the present invention controls the drive of the drive motor 26 to be stopped when the encoder 70 detects that the rotational position of the rotary shaft 31 has reached a predetermined amount. As a result, the influence of the delay angle can be removed.

Next, the two sets of cover tape peeling mechanisms 23 of the component supply device 6 that is a dual lane feeder will be described with reference to FIGS.
Each of the cover tape peeling mechanism 23 of A lane and B lane is comprised as follows.
The cover tape peeling mechanism 23 is provided with a drive motor 42 having a worm gear 41 on its output shaft. The cover tape peeling mechanism 23 includes a first rotating body 46 that is driven by a drive motor 42. The cover tape peeling mechanism 23 includes a second rotating body 50 that is driven by the first rotating body 46. Further, the cover tape peeling mechanism 23 includes a third rotating body 56 driven by the second rotating body 50. Furthermore, the cover tape peeling mechanism 23 includes a roller 57, a roller 60, a spring 61, a tension applying body 62, and a stopper 63 that guide the cover tape Ca.

That is, the first rotating body 46 includes a gear 43 that meshes with the gear 45 and the worm gear 41 around the periphery, and is rotatably supported by the support body 44 fixed to the unit frame 21 via the support shaft 46A.
Therefore, the first rotating body 46 rotates by the rotation of the gear 43 that rotates according to the rotation of the worm gear 41 provided on the output shaft of the drive motor 42.

The second rotating body 50 includes a gear 47 that meshes with the contact portion 51 and the gear 45 around the periphery, and can be rotated via a support shaft 50A to a support 49 fixed to the unit frame 21 via an attachment body 48. It is supported by.
Accordingly, the second rotating body 50 is rotated by the rotation of the gear 47 that rotates in accordance with the rotation of the gear 45 of the first rotating body 46.

The third rotating body 56 includes an abutting portion 52 that is urged by and abutted by the abutting portion 51 and the spring 55 around the third rotating body 56 and is swingable to the unit frame 21 via the support shaft 53. 54 is rotatably supported by a support shaft 56A.
Further, the roller 57 guides the cover tape Ca to the roller 60. The roller 60 is provided at an end of an attachment body 59 that can swing on the unit frame 21 via a support shaft 58, and guides the cover tape Ca guided by the roller 57. The tension applying body 62 is biased by the spring 61 and applies tension to the cover tape Ca. The stopper 63 is a stopper for restricting the swinging of the attachment body 59.

  Accordingly, when the cover tape Ca is peeled off, when the drive motor 42 is driven, the first rotating body 46 is rotated via the worm gear 41 and the gear 43, and when the first rotating body 46 is rotated, the gear 45 is rotated. And the second rotating body 50 rotates via the gear 47. When the second rotating body 50 rotates, the third rotating body 56 rotates with the contact portion 52 and the contact portion 51 urged by the spring 55 sandwiching the cover tape Ca. The cover tape Ca of the storage tape C is peeled by one pitch from the opening (slit) 38 of the suppressor 37 by the rotation of the third rotating body 56, and does not loosen at the end of the component supply device 6. It is stored in the provided storage section 65.

  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 shutter 77. In the shutter 77, a groove in which a pin projecting from an operating body is fitted is formed in a bent piece, and a fitting piece that is fitted in a guide groove formed in the suppressor 37 is formed, and the shutter 77 slides on the suppressor 37. It is provided to be movable. Accordingly, when opening and closing the pickup opening 38 by moving the shutter 77, when the drive motor is driven, the nut body and the operating body screwed to the screw shaft move. As a result, when the fitting piece moves along the guide groove, the shutter 77 moves to open and close the opening 38.

  The shutter 77 closes the opening 38 so that the electronic component A sent to the pickup position does not jump out of the storage portion of the storage tape C from which the cover tape Ca has been peeled off in a state where the shutter 77 has moved to the close position. In addition, the shutter 77 moves backward from above the electronic component A so as to be picked up by the suction nozzle 18 while being moved to the open position.

  Reference numeral 66 denotes a power supply line for supplying power to the drive motors 26, 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 storage device (for example, the RAM 82) stores mounting data (data regarding which electronic component is mounted in which position on which position on the printed circuit board P). A control device (for example, CPU 81) such as a microcomputer drives the tape feeding mechanism 22 of the corresponding predetermined component supply device 6 according to the mounting data, and intermittently feeds the storage tape C that stores the predetermined electronic component once. Let
By the way, in each of the two one-way clutches of the present invention, the directions in which the respective rotating shafts are rotated are reversed. That is, when the drive motor 26 is driven to rotate forward, the spur gear 25 and the gear 28 rotate, and only one rotating shaft 31 of the AB lane rotates. Then, the sprocket 34 rotates intermittently at a predetermined angle in the feed direction through the rotating worm gear 32 and the worm wheel 33 on the rotating shaft 31 side. Thereby, 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. Thus, the electronic component can be supplied independently from one of the two storage tapes C of the left and right storage tapes C by a single drive motor 26.

Next, correction of the delay angle of the one-way clutch 27 will be described.
When the inner ring and the outer ring are not in a locked state, the one-way clutch 27 generates a difference between the rotation angle of the output shaft and the rotation angle of the output shaft, so-called delay angle.
When the drive motor 26 is always continuously rotating forward or intermittently continuously rotating, the inner ring and the outer ring of the one-way clutch 27 are always locked and no delay angle is generated. . However, when the drive motor 26 rotates in the direction opposite to the previous rotation, the inner ring moves away from the outer ring, causing the inner ring and the outer ring not to be locked, and the rotation of the inner ring is delayed from the rotation of the outer ring. Will occur. For example, idling occurs when the rotation direction of the drive motor 26 changes from normal rotation to reverse rotation, or when the rotation direction changes from reverse rotation to normal rotation.
Since the delay angle occurs, even if the drive motor 26 is driven by a predetermined amount and the gear 28 rotates by a predetermined amount, the one rotary shaft 31 that can be rotated by the one-way clutch 27 does not rotate by the predetermined amount. Accordingly, the sprocket 34 that rotates via the worm gear 32 and the worm wheel 33 does not rotate at a necessary predetermined angle.

  In the present invention, an encoder 70 is provided on the rotary shaft 31 in order to correct the delay angle generated by the one-way clutch as in the configuration shown in FIG. The encoder 70 detects the amount of rotation of the rotary shaft 31 and controls the drive motor 26 to stop when it detects that the rotation has rotated a predetermined amount. As a result, the rotation shaft 31 rotates by a predetermined amount, and the sprocket 34 can also perform intermittent feed operation at a predetermined angle via the worm gear 32 and the worm wheel 33.

  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 sent 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.

  FIG. 9 is a control block diagram of the electronic component mounting apparatus. A control block diagram of the electronic component mounting apparatus 1 will be described with reference to FIG. A CPU (Central Processing Unit) 81 is a control device that performs overall control of operations related to mounting of the electronic component mounting apparatus 1. A RAM (Random Access Memory) 82 is a storage device for high-speed processing that stores mounting data for mounting electronic components on the printed circuit board P. The mounting data refers to the X direction, Y direction and angular position information in the printed circuit board P for each mounting order of the electronic component A, the arrangement number information of each component supply device, and the positioning mark attached to the printed circuit board P. Position information (not shown), position information of the feed stop position and pickup position of the electronic component A, and the like. A ROM (Read Only Memory) 83 is a nonvolatile storage device.

  Then, the CPU 81 comprehensively controls the operation related to the component mounting operation of the electronic component mounting apparatus 1 according to the program stored in the ROM 83 based on the mounting data stored in the RAM 82. That is, the CPU 81 controls the X-axis drive motor 12A, the Y-axis drive motor 12B of the XY stage 12 and the θ-axis drive motor 12C of the suction nozzle 18 via the drive circuit 84 and the interface 85.

The substrate recognition processing device 87 is connected to the CPU 81 via the interface 85. The recognition processing device 87 performs recognition processing of an image captured by the board recognition camera 17 and sends the processing result to the CPU 81. That is, the CPU 81 outputs an instruction to the substrate recognition processing device 87 so as to perform recognition processing (calculation of misalignment amount, etc.) on the substrate positioning mark image picked up by the substrate recognition camera 17, and recognizes the recognition processing result. 87 is received.
In addition, the CPU 81 outputs an instruction to the substrate recognition processing device 87 so as to perform recognition processing (such as calculation of the amount of positional deviation) of the A image of the electronic component located in the opening 38 imaged by the substrate recognition camera 17 and recognizes it. The processing result is received from the recognition processing device 87.

  The component recognition processing device 88 is connected to the CPU 81 via the interface 85, and performs recognition processing of an image captured by the component recognition camera 14 picking up the electronic component A in a state of being sucked and held by the suction nozzle 18. The processing result is sent to the CPU 81. That is, the CPU 81 outputs an instruction to the component recognition processing device 88 so as to perform recognition processing (calculation of the amount of misalignment, etc.) of the image of the electronic component A captured by the component recognition camera 14, and recognizes the recognition processing result. 88 is received.

The keyboard 91 is an input unit connected to the CPU 81 via the keyboard driver 90 and the interface 85, and the monitor 92 displays an image such as an image of the electronic component A. Instead of the keyboard 90 as the input means, input means such as a touch panel may be provided and displayed on a display device such as the monitor 92. The drive motors 26 and 42 of the component supply device 6 are also connected to the CPU 81 via the drive circuit 84 and the interface 85.
In addition, the drive motor 42 of the cover tape peeling mechanism 23 is provided for each of the two lanes (A lane and B lane) of the dual lane feeder, but only one like the tape feeding mechanism 22, A one-way clutch and an encoder may be provided and used in common for A lane and B lane.

With the above configuration, the operation of setting the feed stop position of the leading electronic component A in the storage tape C and the pickup position by the suction nozzle 18 to the upstream position of the opening 38 will be described.
First, an operator sets, for example, an 8 mm pitch tape on the component supply device 6, operates the keyboard 91 to drive the drive motors 32, 42, and 71 via the CPU 81, and loads the storage tape C. Move intermittently one pitch at a time. At this time, after the shutter 77 is opened, the substrate recognition camera 17 images the periphery of the opening 38 and the substrate recognition processing device 87 performs recognition processing. If there is no electronic component A in the opening 38, the CPU 81 controls again to repeat the operation of driving the drive motors 26 and 42. Note that the distance for intermittent movement varies depending on the pitch of the feed holes of the supply tape.

  When the leading electronic component A in the storage tape C is positioned in the opening 38, the shutter 77 is opened. Thereafter, the substrate recognition camera 17 images the periphery of the opening 38 and the substrate recognition processing device 87 performs recognition processing. At that time, based on the recognition result of the electronic component A located in the opening 38 by the substrate recognition processing device 87, the CPU 81 sets the drive stop position of the electronic component A to the upstream position of the opening 27A, And 42 are corrected.

  Accordingly, the pickup position of the electronic component by the suction nozzle 18 determined by the movement by the X-axis drive motor 12A and the Y-axis drive motor 12B was the center position of the opening 38, but the feed stop position of the electronic component A and the suction nozzle 18 The pickup position is set to the upstream side position of the opening 38. Thereby, an electronic component can be sent stably and it can eliminate having a bad influence on the behavior of the electronic component by carrying out up and down.

FIG. 10 is a flowchart of the tape feeding control of the dual lane feeder. In the component supply device 6 that is a dual lane feeder, the CPU 81 of the control block unit described with reference to FIG. 9 controls the control unit 69 of the component supply device 6 in the process of controlling the electronic component mounting device 1. Performs tape feed control.
In the tape feed command presence / absence confirmation step S11, the control unit 69 of the component supply device 6 confirms whether or not there is a tape feed command from the CPU 81 of the electronic component mounting device 1 at a predetermined cycle. If there is no tape feed command at the time of confirmation, confirmation is performed after a predetermined time. If there is a tape feed command at the time of confirmation, the process proceeds to the tape feed direction confirmation step S12.
In the drive motor rotation direction confirmation step S12, it is confirmed whether or not the rotation direction of the drive motor 26 is the same as the previous rotation direction. Alternatively, it is confirmed whether or not the same lane as the tape that was taped immediately before is to be fed. If the rotation directions are the same or the lanes are the same, the process proceeds to the first feed operation step S13. If the rotation direction is different or the lanes are different, the process proceeds to the second feed operation step S15.

In the first feed operation step S13, the drive motor 26 is rotated (driven) in the immediately preceding feed direction, and the process proceeds to the feed amount determination step S14.
In the feed amount determination step S14, it is determined whether or not it has been rotated to a predetermined rotation amount. If it has not been rotated to the predetermined rotation amount, the process returns to the process of the first feed operation step S13, and the rotation is made to the predetermined rotation amount. If so, the process proceeds to the feed operation stop step S17. Whether or not the motor has been rotated to a predetermined feed amount is determined by output data of an encoder (see FIG. 11 described later) attached to the drive motor 26.

In the second feed operation step S15, the drive motor 26 is rotated in the direction opposite to the previous feed direction, and the process proceeds to the encoder detection step S16. In this case, since a delay angle is generated, the determination is not made based on output data of an encoder attached to the drive motor 26 (see FIG. 11 described later).
That is, in the encoder detection step S16, the output data of the encoder 70 is detected and it is determined whether or not it has been rotated to a predetermined rotation amount. If it has not been rotated to the predetermined rotation amount, the second feed operation step S15 is performed. Returning to the process, if the rotation is performed up to a predetermined rotation amount, the process proceeds to the process of the feed operation stop step S17. Whether or not the motor has been rotated to a predetermined rotation amount is determined by output data from an encoder 70 (see FIG. 11 described later) provided on the rotating shaft 31.

In the feed operation stop step S17, the rotation (drive) of the drive motor 26 is stopped, and the process proceeds to the mounting operation stop determination step S18.
In the mounting operation stop determination step S18, it is confirmed whether or not a mounting operation stop signal is input from the CPU 81 or whether or not the power supply of the component supply device 6 is turned off. When the mounting operation stop signal is input or when the power of the component supply device 6 is turned off, the component supply device 6 stops its operation. When the mounting operation stop signal is not input, or when the power supply of the component supply device 6 remains on, the process returns to the tape feed command presence check step S11.
Note that the control unit 69 of the component supply device 6 is configured to output the data of each encoder, the tape feed command from the CPU 81 and the rotation direction (or use lane) at the time when an event occurs in a memory described later along with time information. Memorize immediately.

FIG. 11 is a block diagram showing the relationship between the driver unit 71 as a part of the control unit 69 provided in the component supply device 6, the encoder 70, and the drive motor 26.
In FIG. 7, the driver unit 71 receives a command from the CPU 81 via the control unit 69 or directly and collates it with the data stored in the memory 72, and the received command is the rotation direction received immediately before. It is determined whether or not there is. And when it is the same rotation direction as the instruction | command received immediately before, the operation | movement which rotates the drive motor 26 in the said direction is started. Further, the driver unit 71 inputs detection data from the encoder 73 that detects the rotation amount of the drive motor 26 and stops the rotation of the drive motor 26 when the rotation amount stored in the memory 72 is reached.
In FIG. 7, the driver unit 71 collates with the data stored in the memory 72, and when the command received from the CPU 81 is not the rotation direction received immediately before, the driver unit 71 rotates the drive motor 26 in that direction. To start. Further, the driver unit 71 inputs detection data from the encoder 70 that detects the rotation amount of the rotary shaft 31, and stops the rotation of the drive motor 26 when the rotation amount stored in the memory 72 is reached.

  In FIG. 11, when the drive motor 26 does not include the encoder 73, the number of pulses corresponding to the feed pitch of the storage tape accommodated in each lane of the component supply device is stored in the memory 72 and stored. The number of pulses may be output to the drive motor 26.

According to the first embodiment, in the component supply device of the dual lane feeder, even if the play (lag angle) until meshing with the one-way clutch is corrected and the driving direction is changed from normal rotation to reverse rotation or from reverse rotation to normal rotation, A component supply apparatus and a component supply method capable of feeding a supply tape can be realized.
As a result, it is possible to realize a reduction in the number of parts, a reduction in cost, a reduction in weight, and a reduction in size of the parts supply device.

  Next, a second embodiment of the tape feeding mechanism will be described with reference to FIG. FIG. 12 is a partial side view of the feed mechanism of the component supply apparatus. The configuration of FIGS. 1 to 6 and 8 described in the first embodiment is also basically applied to the second embodiment. The one-way clutch 27 in FIG. 7 is provided on the gear 28 of the rotary shaft 31 in the tape feed mechanism 22 ′ in FIG. 12, whereas the drive motor 26 (referred to as the drive motor 26 ′ in FIG. 12). The two gears (first gears) 28A of the output shaft are provided. That is, instead of the spur gear 25 provided on the output shaft of the drive motor 26 in FIG. 7, gears 28A each having a one-way clutch 27A are provided. Then, two spur gears (second gear) 25A for A lane and B lane are provided on the rotating shaft 31 'instead of the gear 28, and the gear 28A and the spur gear 25A are engaged with each other. .

In the tape feed mechanism 22 ′ of FIG. 12, the drive motor 26 ′ is a servo motor capable of forward / reverse rotation provided with two gears 28A for A lane and B lane at one end of its output shaft. Each of the gears 28A includes a one-way clutch 27A inside, and meshes with two spur gears 25A provided on the output shaft.
The two one-way clutches 27A are for A lane and B lane, and the meshing directions are reversed. For example, when the drive motor 26 'rotates in the forward direction (clockwise rotation), the one-way clutch 27 of the A lane gear 28A rotates idly and the one-way clutch 27A of the B lane gear 28A engages. Conversely, when the drive motor 26 'rotates in the reverse direction (rotates counterclockwise), the one-way clutch 27A of the gear 28A for the B lane rotates idly and the one-way clutch 27A of the gear 28A for the A lane engages.

Similarly to the rotary shaft 31 of FIG. 7, the rotary shaft 31 ′ is rotatably supported by a support 29 for A lane or B lane via a bearing 30, and an intermediate portion of the respective rotary shaft 31 ′. Is provided with a worm gear 32.
Therefore, when the drive motor 26 ′ is driven to supply the electronic components in one of the storage tapes C in the component supply device 6 and rotates forward, the one gear 28A and the gear 25A rotate, and each one-way clutch 27A Only the rotation shaft 31 'rotates. Then, the corresponding sprocket 34 is intermittently rotated in the feed direction by a predetermined angle through the corresponding worm gear 32 and worm wheel 33, whereby one of the storage tapes C is intermittently fed through the feed hole Cb. Moreover, since the other rotating shaft 31 'does not rotate, the other storage tape C is not intermittently fed. Conversely, when the drive motor 26 'is driven to reversely supply the electronic components in one of the storage tapes C in the component supply device 6, the other gear 28A and the gear 25A rotate, and each one-way clutch 27A causes the other Only the rotation shaft 31 'rotates. Then, the corresponding sprocket 34 rotates intermittently by a predetermined angle in the feed direction via the corresponding worm gear 32 and worm wheel 33, thereby intermittently feeding the other storage tape C via the feed hole Cb. Moreover, since one rotating shaft 31 'does not rotate, one storage tape C is not intermittently fed.
In this embodiment, the rotational force of the drive motor 26 'is transmitted by meshing between gears, but it is obvious that other transmission means such as transmission by a belt may be used.

  Other configurations and operations in the tape feeding mechanism 22 ′ in FIG. 12 are the same as those in FIG. 7, so description thereof will be omitted (see, for example, FIGS. 1 to 6 and FIGS. 8 to 11).

  According to the second embodiment, it is not necessary to provide a one-way clutch on the gear 25A provided on each rotary shaft 31 ′, and the diameter of the gear 25A can be reduced as much as possible. As a result, the thickness of the tape feeding mechanism 22 ′ is reduced as much as possible. It becomes possible to make it thinner. Moreover, although the system which provided the one-way clutch in the gearwheel was demonstrated, the mechanism using a timing pulley instead of a gearwheel may be sufficient.

13 and 14 are partial side views of the feeding mechanism of the component supply apparatus according to the third embodiment.
In the first and second embodiments, the encoder is provided on the rotating shaft 31 or 31 ′. However, as shown in FIG. 13 or FIG. 14, the encoder 74 or the encoder 75 may be provided on the worm wheel 33 or the sprocket 34.

  According to the third embodiment, since the rotation amount can be detected at the position closest to the sprocket hole of the supply tape, the intermittent feeding of the tape can be realized with higher accuracy than the effect of the first or second embodiment. .

The present invention has been described by taking a so-called multi-function chip mounter as an example of the electronic component mounting apparatus. However, the present invention is not limited to this and can be applied to a high-speed chip mounter such as a rotary type.
The one-way clutch does not generate a delay angle if the inner ring and the outer ring are in a locked state. Therefore, if the drive shaft is held while the drive motor is energized, and the rotation direction is the same, there will be no delay angle, and there is no need to detect the amount of rotation with the encoder provided on the rotation shaft 31. . In other words, the control to correct the delay angle of the one-way clutch is limited to the state where the drive motor is not energized, the state where the drive shaft of the drive motor is not held, or the direction opposite to the previous drive rotation direction. You may do it.
Furthermore, the influence of the delay angle can be removed by controlling the drive motor 26 to stop using detection by a photosensor instead of the encoder. For example, the rotation amount may be detected by detecting the rotation of the sprocket teeth with a photo sensor.

  Although the present invention has been described in detail with reference to the embodiments, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description. The present invention is not limited to the above-described various modifications. It encompasses alternatives, modifications or variations. Further, the present invention is not limited to the above-described embodiments, and the present invention can be modified based on the spirit and spirit of the present invention as long as the person has ordinary knowledge in the technical field to which the present invention belongs. Of course, the invention which can be changed is included.

  1: Electronic component mounting device, 2: Machine base, 3: Conveyor unit, 4: Component mounting unit, 5: Component supply unit, 6: Component supply device, 8: Set table, 9: Supply conveyor, 10: Discharge conveyor, 12: XY stage, 12A: X-axis drive motor, 12B: Y-axis drive motor, 12C: θ-axis drive motor, 13: Head unit, 14: Component recognition camera, 15: Nozzle stocker, 16: Mounting head, 17: Board Recognition camera, 18: suction nozzle, 19: unit base, 21: unit frame, 21A: intermediate partition, 22, 22 ′: tape feeding mechanism, 23: cover tape peeling mechanism, 24: shutter mechanism, 25, 25A: flat Gear, 26, 26 ': Drive motor, 27, 27A: One-way clutch, 28, 28A: Gear, 29: Support , 30: bearing, 31, 31 ′: rotating shaft, 32: worm gear, 33: worm wheel, 34: sprocket, 35: support shaft, 37: suppressor, 38: opening, 39: slit, 40: suppressor presser, 40A : Spring A, 41: Worm gear, 42: Drive motor, 43: Gear, 44: Support, 45: Gear, 46: Rotating body, 46A: Support shaft, 47: Gear, 48: Mounting body, 49: Support 50: Rotating body, 50A: Support shaft, 51: Contact portion, 52: Contact portion, 53: Support shaft, 54: Mounting body, 55: Spring, 56: Rotating body, 56A: Support shaft, 57: Roller 58: support shaft, 59: mounting body, 60: roller, 61: spring, 62: tension applying body, 63: stopper, 65: storage section, 66: power supply line, 69: Control unit, 70: Encoder, 71: Driver unit, 72: Memory, 73, 74, 75: Encoder, 77: Shutter, 81: CPU, 82: RAM, 83: ROM, 84: Drive circuit, 85: Interface, 87 : Substrate recognition processing device, 88: component recognition processing device, 91: keyboard, 92: monitor, A: electronic component, C: storage tape, Ca: cover tape, Cb: feed hole, P: printed circuit board.

Claims (3)

In an electronic component supply apparatus that intermittently feeds a storage tape carrying electronic components to a storage portion to a component pickup position, a drive motor capable of forward / reverse rotation provided with one first gear on its output shaft, and a one-way clutch inside each Two rotating shafts that are provided at one end with a second gear that meshes with the first gear and that is rotatably supported by the respective support members, and a worm gear provided on each of the rotating shafts. Two sprockets that have a meshing worm wheel and mesh with a feed hole formed in the storage tape to feed the worm wheel, and an encoder provided on either the two rotary shafts or the second gear,
Each of the one-way clutches rotates the first gear and the second gear to rotate one of the rotating shafts when the drive motor is driven forward or backward, thereby rotating a corresponding worm gear and worm wheel. The corresponding sprocket is intermittently rotated in the feeding direction of the storage tape via the other rotation shaft so that the other rotation shaft does not rotate and the directions allowing the rotation of both rotation shafts are opposite to each other,
When the drive motor rotates in the direction opposite to the previous rotation, the position of the rotation shaft detected by the encoder provided on either of the two rotation shafts or the second gear becomes a predetermined amount. the driving of the drive motor stops, when the drive motor rotates in the same rotational direction as the previous time, the predetermined amount the position of the rotary shaft which is determined output data or these encoders provided on the drive motor The electronic component supply apparatus is characterized in that the drive of the drive motor is stopped when it becomes. In an electronic component supply apparatus that intermittently feeds a storage tape carrying an electronic component to a storage portion to a component pickup position, a drive capable of forward and reverse rotation provided with two first gears each having a one-way clutch on its output shaft A motor, two rotary shafts each having a second gear that meshes with each of the first gears and rotatably supported by the respective support members, and meshed with worm gears provided on the respective rotary shafts Two sprockets having a worm wheel and meshing with and feeding a feed hole formed in the storage tape, and an encoder provided on either the second gear or the two rotating shafts,
Each of the one-way clutches rotates one of the first and second gears to rotate one of the rotating shafts when the drive motor is driven forward or reverse, thereby rotating the corresponding worm gear and worm wheel. The corresponding sprocket is intermittently rotated in the feeding direction of the storage tape, but the other rotating shaft is not rotated and the directions allowing the rotation of both rotating shafts are opposite to each other,
When the drive motor rotates in the direction opposite to the previous rotation, the position of the rotary shaft detected by the encoder provided on either the second gear or the two rotary shafts reaches a predetermined amount. the driving of the drive motor stops, when the drive motor rotates in the same rotational direction as the previous time, the predetermined amount the position of the rotary shaft which is determined output data or these encoders provided on the drive motor The electronic component supply apparatus is characterized in that the drive of the drive motor is stopped when it becomes. A drive motor capable of forward / reverse rotation having one first gear on the output shaft, and a second gear which is provided with a one-way clutch inside and meshes with the first gear, respectively, at one end thereof, and each support body Two sprockets each having two rotating shafts rotatably supported on each of the rotating shafts, and a worm wheel meshing with a worm gear provided on each of the rotating shafts, and meshing with a feeding hole formed in a storage tape, In an electronic component supply method of an electronic component supply apparatus, comprising: an encoder provided on either one of two rotary shafts or the second gear, and intermittently feeding the storage tape on which an electronic component is mounted in a storage portion to a component pickup position ,
A tape feed direction confirmation step for confirming whether or not the tape feed direction is the same as or the same lane as the immediately preceding feed direction when a tape feed command is issued from an electronic component mounting apparatus incorporating the electronic component supply apparatus; ,
When the tape feed direction is the same as or the same as the previous feed direction, the encoder provided in the drive motor determines whether or not the drive motor is rotated in the previous rotation direction and rotated to a predetermined rotation amount. a feeding operation steps of the output data Does it determined first,
When the feeding direction of the tape is different from the previous feeding direction or in a different lane, the drive motor is rotated in the rotation direction opposite to the previous rotation direction and rotated to a predetermined rotation amount. An encoder detection step of determining whether or not from output data of the encoder provided on either of the two rotating shafts or the second gear,
The electronic component supply method according to claim 1, wherein the rotation of the drive motor is stopped when the rotation amount reaches the predetermined rotation amount.

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