JP5965697B2 - Parts supply unit - Google Patents

Description

  The present invention relates to a dual lane feeder type component supply unit that can separately and independently supply electronic components from two storage tapes by two feeding mechanisms.

  A component supply unit that supplies electronic components is disclosed in, for example, Patent Document 1 and the like, and intermittently feeds storage tapes that are sequentially drawn out to a component removal position. In addition, a plurality of the component supply units are arranged side by side in the electronic component mounting apparatus. As the component supply unit, a dual lane feeder type component supply unit that can supply electronic components in parallel using two storage tapes is used. Has been.

JP 2010-67933 A

  However, the feed dog formed on the outer periphery meshes with the feed hole formed in the storage tape, and the storage tape is intermittently sent by the sprocket. If this sprocket is not attached in a stable state, There is a problem in that the component suction position (component extraction position) of the component becomes unstable, sometimes failing to be reliably suctioned by the suction nozzle, and a suction error occurs.

  Accordingly, the present invention provides a dual lane feeder type component supply unit in which the sprocket for intermittently feeding the storage tape is mounted in a stable state, the component suction position of the electronic component is stabilized, and the electronic component is reliably sucked by the suction nozzle. The purpose is to reduce adsorption mistakes as much as possible.

For this reason, the present invention is a dual lane feeder type in which electronic components can be separately and independently supplied from two storage tapes, and after the cover tape of each storage tape is peeled off, Each sprocket that has a feed dog to be fitted and that intermittently feeds the carrier tape is intermittently rotated through each ball bearing with each support shaft as a fulcrum, and electronic components are supplied separately and independently A component supply unit having a first end portion and a second end portion opposite to the first end portion, and a shaft provided with a screw hole extending in the axial direction; and the first end portion of the support shaft is fitted a fitting portion which includes a unit frame which includes a first pressing portion, and a restricting portion which is projected from the peripheral side surface of the support shaft, is screwed from the first end portion side to the screw hole of the support shaft , The support shaft and the unit frame And a second fixing screw that is screwed into the screw hole of the support shaft from the second end side. A first ball bearing set that is disposed between the unit frame and the restricting portion and includes first and second ball bearings for rotating one of the gears, and the restricting portion and the first ball. A third collar and a fourth collar are disposed between the first collar wound around the support shaft between the bearing set , the second fixing portion and the restricting portion, and for rotating the other gear . A second ball bearing set comprising ball bearings, and a second collar wound around the support shaft between the restricting portion and the second ball bearing set , wherein the first and second ball bearings are An inner ring in contact with a peripheral side surface of the support shaft, and the one And the third and fourth ball bearings each include an inner ring that is in contact with a peripheral side surface of the support shaft and an outer ring that clamps the other gear, and the first fixing screw and the By the screwing of the second fixing screw, a pressing force is applied to the inner ring from the first pressing portion and the second pressing portion, and the gear is held against the outer ring by a reaction force accompanying the pressing force. It is characterized by being given the power to do.

  In the dual lane feeder type component supply unit, the sprocket for intermittently feeding the storage tape is attached in a stable state, the component suction position of the electronic component is stabilized, and the electronic nozzle can be reliably sucked by the suction nozzle. Thus, adsorption mistakes can be reduced as much as possible.

It is a top view of an electronic component mounting apparatus. It is a side view of a component supply unit. It is a principal part expansion longitudinal cross-sectional view of a components supply unit. It is a principal part enlarged side view of the component supply unit which removed the unit frame. It is a top view of a component supply unit. It is a longitudinal cross-sectional view of the component supply unit of the arrow direction of FIG.

  Hereinafter, an electronic component mounting apparatus will be described with reference to the accompanying drawings. This electronic component mounting apparatus is a multifunctional chip mounter that is a so-called high-speed gantry mounting apparatus, 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. The 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 into the electronic component mounting device 1.

  The conveyor unit 3 includes a central positioning unit 8, a supply conveyor 9 on the left side, and a discharge conveyor 10 on the right side. The printed circuit board P is supplied from the supply conveyor 9 to the positioning unit 8, and the positioning unit 8 positions the printed circuit board P at a predetermined height so as to receive the mounting of the electronic components. Then, the printed circuit board P on which the mounting of the electronic components is completed is discharged from the positioning unit 8 to the downstream device via the discharge conveyor 10.

  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 drive motor, and the head unit 13 is moved in the X direction along the beam 12A by the X axis drive motor. As a result, the head unit 13 is moved in the XY direction. Will be moved to.

  Each component supply unit 5 includes a component supply unit 6 which is a large number of component supply devices on a feeder base 19 so as to be detachable side by side. Each component supply unit 6 is provided with a storage tape C in which a large number of electronic components D are stored in the respective component storage portions Cb of the carrier tape Cc at regular intervals, and the storage tape C is intermittently fed and the cover tape Ca. Is peeled and the electronic components D are sent to the component suction position (component extraction position), whereby the electronic components D are supplied one by one from the tip of the component supply unit 6 to the component mounting portion 4.

  In the operation based on the mounting data of the electronic component mounting apparatus main body 1, first, the XY stage 12 is driven, the head unit 13 faces the component supply unit 6, and then the suction nozzle 18 provided on the mounting head 16 is lowered. A desired electronic component D is picked up (taken out) from the carrier tape Cc from which the cover tape Ca has been peeled off.

  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, and the electronic component is picked up and held by the suction nozzle 18 and picked up. Recognize the posture and displacement relative to the suction nozzle 18.

  Next, the mounting head 16 is moved to the position of the printed circuit board P on the positioning unit 8, and the position of the circuit board P is recognized by the circuit board recognition camera 17, and then based on the recognition result by the component recognition camera 14 and the circuit board recognition camera 17. The X-axis drive motor, the Y-axis drive motor of the XY stage 12 and the θ-axis drive motor of the suction nozzle 18 are corrected and moved, the vertical axis drive motor is driven to lower the suction nozzle 18 and the electronic component is printed on the printed circuit board P. Install on top.

  Next, the component supply unit 6 will be described with reference to FIGS. The component supply unit 6 includes a unit frame 21 which is a unit main body, and a storage tape C which is sequentially wound in a state of being wound around a storage tape supply reel which is rotatably mounted on the component supply unit 5. The tape feeding mechanism (tape feeding device) 22 intermittently feeds the component tape to the component take-out position, and the cover tape peeling mechanism 20 for peeling the cover tape Ca of the storage tape C before the pickup position of the electronic component.

  As shown in FIG. 3, the storage tape C fed out from the storage tape supply reel is fed into the pickup position PU so as to dive under the suppressor 23 disposed in the tape path in front of the pickup position PU. . The suppressor 23 has an opening 23A for pickup.

  The suppressor 23 has a substantially U-shaped cross section from both vertical pieces serving as support portions and a horizontal piece that holds the storage tape C engaged with the teeth of the sprocket 38 so as not to come off. When the locking is released, the vertical piece is rotatably supported with the pin 25 at the rear as a fulcrum. When the front portion of the suppressor 23 is locked, the suppressor 23 is urged downward, and the suppressor 23 constantly presses the carrier tape Cc after the storage tape C and the cover tape are peeled against the tape guide chute 24. It acts so that the feed hole of the carrier tape Cc is not removed from the tape feed dog of the sprocket 38.

  A slit 23B is also formed, and the cover tape Ca of the storage tape C is peeled from the carrier tape Cc by the cover tape peeling mechanism 20 through the slit 23B, and stored in the cover tape collecting and storing part 26 having the storage space S. Is done. That is, in a state where the cover tape Ca is peeled off by the cover tape peeling mechanism, the electronic component D mounted on the component storage portion Cb of the carrier tape Cc is sent to the pickup position PU by the feed mechanism 22 and is adsorbed through the opening 23A. It is picked up by the nozzle 18.

  Next, the tape feeding mechanism 22 will be described with reference to FIGS. 4 to 6. As the component supplying unit 6, electronic components can be separately and independently supplied from two storage tapes by two feeding mechanisms. 4 and 5 is the feeding direction of the storage tape C, the upper part is one feeding mechanism 22A in the dual lane feeder, and the lower part is the other feeding unit. Mechanism 22B.

  First, the one feed mechanism 22A includes a pulse motor 31 which is a drive source capable of forward and reverse rotation, a first rotating body 30 provided on an output shaft of the pulse motor 31 and having a spur gear, and the first rotating body 30. A large-diameter spur gear 32 that meshes with the spur gear and a small-diameter spur gear 33 that has a smaller diameter than the large-diameter spur gear 32 and is fixed to the large-diameter spur gear 32 and can be rotated via a ball bearing 35 with a support shaft 34 as a fulcrum. And a spur gear 37 meshing with the small-diameter spur gear 33 of the second rotator 36, and a sprocket 38 fixed to the spur gear 37, with a support shaft 39 as a fulcrum. And a third rotating body 41 that is rotatable. The sprocket 38 can feed the storage tape C with the feed dogs formed on the outer periphery thereof meshing with the feed holes formed in the storage tape C.

  Accordingly, when the pulse motor 31 is driven to supply the electronic components in the storage tape C in the component supply unit 6 and intermittently rotates forward at a predetermined angle (counterclockwise in FIG. 4), the first rotating body 30 rotates forward. When the first rotating body 30 rotates forward, the large-diameter spur gear 32 and the small-diameter spur gear 33 meshing with the spur gear of the first rotating body 30 are connected to the second rotating body 36 via the ball bearing 35 with the support shaft 34 as a fulcrum. A third rotating body 41 having a spur gear 37 and a sprocket 38 that reversely rotates (clockwise in FIG. 4) and meshes with the small diameter spur gear 33 of the second rotating body 36 by the reverse rotation of the second rotating body 36. With the support shaft 39 as a fulcrum, it rotates normally through a plurality of ball bearings 40, and the feed teeth formed on the outer periphery of the sprocket 38 are formed on the storage tape C by the normal rotation of the sprocket 38. Meshes with the feed holes, the storage tape C can be sent by one pitch.

  As shown in FIG. 5, the one feed mechanism 22A has the pulse motor 31 disposed on the feed direction side of the storage tape C, and extends in the direction of arrow A upstream of the pulse motor 31. A ball bearing 35 includes a large-diameter spur gear 32 that meshes with a spur gear of the first rotating body 30 provided on the output shaft, and a small-diameter spur gear 33 that is fixed to the inside of the large-diameter spur gear 32. A second rotating body 36 that can be rotated via the second rotating body 36 is disposed, and a spur gear 37 that meshes with the small-diameter spur gear 33 of the second rotating body 36 at an upstream position of the second rotating body 36 and an inner side of the spur gear 37. A third rotating body 41 that includes a fixed sprocket 38 and is rotatable via a ball bearing 40 with a support shaft 39 as a fulcrum is disposed.

  And about the other feed mechanism 22B, the said pulse motor 31 is arrange | positioned on the opposite side to the feed direction side of the storage tape C, and the output shaft extended in the arrow B direction to the downstream position of this pulse motor 31 is provided. A large-diameter spur gear 32 that meshes with the spur gear of the first rotating body 30 provided and a small-diameter spur gear 33 that is fixed to the outside of the large-diameter spur gear 32 are provided via a ball bearing 35 with a support shaft 34 as a fulcrum. A rotatable second rotator 36 is arranged, and a spur gear 37 that meshes with the small-diameter spur gear 33 of the second rotator 36 at a downstream position of the second rotator 36 and is fixed outside the spur gear 37. A third rotating body 41 that includes a sprocket 38 and is rotatable via a ball bearing 40 with a support shaft 39 as a fulcrum is disposed.

  For this reason, both the pulse motors 31 and 31 are arranged at the upstream position and the downstream position so as not to be adjacent to each other in the juxtaposed direction, and both the sprockets 38 and 38 are arranged to be adjacent to each other in the juxtaposed direction. . In particular, when viewed from the lower side of the paper surface of FIG. 5 (the side surface direction of the component supply unit 6), both the sprockets 38, 38 are arranged to overlap each other.

  4 and 5, when the pulse motors 31 in one feed mechanism 22A and the other feed mechanism 22B are intermittently rotated by a predetermined angle (counterclockwise in FIG. 4), the storage tape C is fed by one pitch. It is a configuration.

  As described above, by configuring the feed mechanisms 22A and 22B and arranging the components such as the pulse motor 31, the thickness in the juxtaposed direction can be reduced as much as possible even with the dual lane feeder.

  Next, the third rotating body 41 of the feeding mechanisms 22A and 22B will be described in detail based on FIG. First, the unit frame 21 is provided with a storage hole 21A for storing the head of the fixing screw 42 and a screw hole 21B having a smaller diameter than the storage hole 21A in communication with the storage hole 21A. A fitting portion 21C protrudes from the portion to be formed.

  A fitting hole 39A in which the fitting portion 21C is fitted along the longitudinal direction is formed in the center portion of the support shaft 39. The screw hole 39B (fixed) has a diameter smaller than that of the fitting hole 39A. The screw 42 is screwed.), The screw hole 39C communicating with the screw hole 39B (the fixing screw 43 is screwed), and the screw hole 39C communicating with the screw hole 39C and having a larger diameter than the screw hole 39C. And are formed. In addition, a restricting portion 39E is projected from the longitudinal center of the surface of the support shaft 39 over the entire circumference of the circumferential side surface.

  Further, a plurality of ball bearings 40, that is, ball bearings 40A3 and 40A4 closer to the unit frame 21 on the right side in FIG. 6 than the restricting portion 39E, and the restricting portion 39E in FIG. Ball bearings 40A1 and 40A2 are disposed on the left side.

  Each of these ball bearings 40A1, 40A2, 40A3, 40A4 includes an inner ring 40A11, 40A21, 40A31, 40A41, a plurality of balls 40A12, 40A22, 40A32, 40A42, and outer rings 40A13, 40A23, 40A33, 40A43.

  On the peripheral side surfaces of the outer rings 40A13 and 40A23 of the ball bearings 40A1 and 40A2, pressing convex portions 40A131 and 40A231 are formed as pressing portions. Further, pressing convex portions 40A331 and 40A431 as pressing portions are formed on the peripheral side surfaces of the outer rings 40A33 and 40A43 of the ball bearings 40A3 and 40A4.

  43A and 43B are collars made of a hard synthetic resin material, and the collar 43A is disposed around the support shaft 39 between the inner ring 40A21 of the ball bearing 40A2 and the restricting portion 39E. Is wound around the support shaft 39 between the inner ring 40A31 of the ball bearing 40A3 and the restricting portion 39E.

  Next, a method for attaching the third rotating body 41A will be described with reference to FIG. First, the collars 43 </ b> A and 43 </ b> B are placed around the support shaft 39 at positions where the restricting portion 39 </ b> E is sandwiched. Next, the ball bearings 40A1 and 40A2 are placed around the support shaft 39 so that one (left side in FIG. 6) of the spur gear 37 is sandwiched between the pressing convex portions 40A131 and 40A231, and the other (right side in FIG. 6). The ball bearings 40A3 and 40A4 are placed around the support shaft 39 so that the spur gear 37 is sandwiched between the pressing convex portions 40A331 and 40A431.

  In this state, the fixing screws 43 and 44 are fastened and fixed so that the fitting portion 21C of the unit frame 21 is fitted into the fitting hole 39A of the support shaft 39.

  Accordingly, by tightening the fixing screws 43 and 44, in FIG. 6, the unit frame 21 presses the inner ring 40A41 of the rightmost ball bearing 40A4 to the left, so the inner ring 40A31 of the ball bearing 40A3 is also moved to the left. The inner ring 40A31 of the ball bearing 40A3 generates a reaction force in the right direction by the restriction portion 39E and the collar 43B.

  Further, since the inner ring 40A41 of the ball bearing 40A4 is pressed as described above, the ball 40A42 generates a reaction force in the outer ring 40A43 in the right direction opposite to the direction in which the inner ring 40A41 is pressed to the left. The outer ring 40A33 generates a reaction force in the left direction opposite to the rightward pressing direction of the inner ring 40A31 by the 40A3 ball 40A32.

  Also, by tightening the fixing screws 43 and 44, in FIG. 6, the fixing screw 43 presses the inner ring 40A11 of the leftmost ball bearing 40A1 to the right, so the inner ring 40A21 of the ball bearing 40A2 also moves to the right. The inner ring 40A31 of the ball bearing 40A2 generates a reaction force to the left by the restriction portion 39E and the collar 43A. Since the inner ring 40A11 of the ball bearing 40A1 is pressed as described above, the ball 40A12 generates a reaction force in the outer ring 40A13 in the left direction opposite to the rightward pressing direction of the inner ring 40A11. The ball 40A22 of 40A2 generates a reaction force in the outer ring 40A23 in the right direction opposite to the pressing direction of the inner ring 40A21 to the left.

  Then, by setting the width of the collars 43A and 43B in the direction along the support shaft 39 so as to perform the above-described function, the spur gear 37 and the sprocket 38 fixed to the spur gear 37 are The backlash in the thickness direction is reduced. For this reason, the sprocket 38 can feed the storage tape C with the feed teeth formed on the outer periphery thereof securely meshing with the feed holes formed in the storage tape C in a fixed position, and the electronic component D can be adsorbed. The position (part extraction position) will be stable, and the suction nozzle 18 can reliably suction, and suction errors will be reduced.

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

6 Parts supply unit 22A, 22B Feed mechanism 30 First rotating body 31 Pulse motor 32 Large diameter spur gear 33 Small diameter spur gear 34 Support shaft 35 Ball bearing 36 Second rotation body 37 Spur gear 38 Sprocket 38E Restricting portion 39 Support shaft 40 Ball Bearing 41 Third rotating body 43A, 43B Color

Claims (1)

A dual lane feeder type that enables electronic components to be supplied separately and independently from two storage tapes in parallel, with feed teeth that fit into the carrier tape feed holes after the cover tape of each storage tape is peeled off In the component supply unit that intermittently rotates the gears to which the sprockets that intermittently feed the carrier tape are fixed via the ball bearings with the respective support shafts as fulcrums, and independently supplies the electronic components,
A support shaft having a first end portion and a second end portion on the opposite side, and having a screw hole extending in the axial direction;
A unit frame provided with a fitting portion fitted to the first end portion of the support shaft, and a first pressing portion ;
A restricting portion protruding from the peripheral side surface of the support shaft ;
A first fixing screw that is screwed into the screw hole of the support shaft from the first end side, and fixes the support shaft and the unit frame;
A second fixing screw having a second pressing portion disposed on the second end side and screwed into the screw hole of the support shaft from the second end side;
A first ball bearing set that is disposed between the unit frame and the restricting portion and includes first and second ball bearings for rotating one of the gears ;
A first collar wound around the support shaft between the restricting portion and the first ball bearing set ;
A second ball bearing set comprising a third and a fourth ball bearing disposed between the second fixed portion and the restricting portion for rotating the other gear ;
A second collar wound around the support shaft between the restricting portion and the second ball bearing set ;
The first and second ball bearings each include an inner ring that contacts a peripheral side surface of the support shaft and an outer ring that sandwiches the one gear, and the third and fourth ball bearings each include a periphery of the support shaft. Including an inner ring in contact with a side surface and an outer ring sandwiching the other gear,
By the screwing of the first fixing screw and the second fixing screw, a pressing force is applied to the inner ring from the first pressing portion and the second pressing portion, and the outer ring is caused by a reaction force accompanying the pressing force. The component supply unit is characterized in that a force for pinching the gear is applied to the component supply unit.

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