JP2012186261A - Tape feeder and component supply method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape feeder and component supply method using the same, capable of reducing component displacement (supply displacement) at a component supply position.SOLUTION: A protrusion section 25a in contact with a side face of a carrier tape 20 advancing inside a tape passage 25 is formed in the tape passage 25 having a pair of guide surfaces 24b for guiding both side faces of the carrier tape 20, thereby guiding the carrier tape 20 in such a direction that an inclination of the carrier tape 20 to the tape passage 25 decreases.

Description

  The present invention relates to a tape feeder that feeds components by advancing a carrier tape in a tape path by rotation of a sprocket, and a component feeding method using the tape feeder.

  2. Description of the Related Art A tape feeder is used as a type of component supply device in a component mounting apparatus that sucks and mounts a component on a substrate by a suction nozzle. The tape feeder includes a tape passage having a pair of guide surfaces for guiding both side surfaces of the carrier tape, and a sprocket having outer teeth inserted in feed holes provided at regular intervals on the carrier tape in the tape passage. The carrier tape is pulled by the rotation of the sprocket to advance in the tape path, and the parts provided side by side on the carrier tape are supplied to the parts supply position where the parts are sucked by the suction nozzle. (For example, patent document 1).

  In such a tape feeder, the width dimension of the tape passage (distance between the pair of guide surfaces) is slightly larger (that is, there is play) than the width dimension of the carrier tape, and the carrier tape Since the feed hole is provided at a position deviated from the axis of the carrier tape by a certain distance in the width direction, the carrier tape proceeds while being slightly inclined with respect to the tape path. The inclination of the carrier tape with respect to the tape path appears as a positional deviation (supply deviation) from the normal component supply position when there is no inclination of the carrier tape with respect to the tape path.

JP 2009-188235 A

  When the supply deviation as described above occurs, the supply deviation is detected when the component is mounted on the substrate as a component displacement (suction displacement) of the component with respect to the suction nozzle when the component is sucked by the suction nozzle. The detected suction deviation is canceled by correcting the position of the suction nozzle when the component is mounted on the substrate. For this reason, if the size of the component itself is large, there is no particular problem even if an adsorption shift occurs. However, if the size of the component itself such as 0402 component is extremely small, the allowable range of supply shift to the component However, there is a problem that a suction error that cannot be normally performed by the suction nozzle is likely to occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a tape feeder and a component supply method using a tape feeder that can reduce the displacement (supply displacement) of components at a component supply position.

  According to a first aspect of the present invention, there is provided a tape feeder having a pair of guide surfaces for guiding both side surfaces of the carrier tape, and an outer peripheral tooth in a feed hole provided at a predetermined interval on the carrier tape in the tape passage. A tape feeder comprising: an inserted sprocket; and a sprocket driving means for advancing the carrier tape in the tape path by rotating the sprocket and supplying parts arranged in the carrier tape at regular intervals to the component supply position A convex portion for guiding the carrier tape in a direction in which the inclination of the carrier tape with respect to the tape passage is reduced by contacting the side surface of the carrier tape traveling in the tape passage is provided in the tape passage.

  A tape feeder according to a second aspect is the tape feeder according to the first aspect, wherein the convex portion is provided with a carrier tape feed hole of the pair of guide surfaces provided in the tape passage. The guide surface on the side of the carrier tape is provided at a position upstream of the position where the outer peripheral teeth of the sprocket are inserted into the feed hole of the carrier tape in the direction of travel of the carrier tape.

  4. A method of supplying parts by a tape feeder according to claim 3, wherein a tape passage having a pair of guide surfaces for guiding both side surfaces of the carrier tape, and a feed hole provided side by side on the carrier tape in the tape passage at regular intervals. A sprocket having outer peripheral teeth inserted therein, rotating the sprocket to advance the carrier tape in the tape passage, and supplying the components provided side by side on the carrier tape to the component supply position. A method of supplying parts by a tape feeder provided with a tape tape, wherein a convex portion in contact with a side surface of a carrier tape traveling in the tape path is provided in the tape path, thereby reducing the inclination of the carrier tape with respect to the tape path. Guide the carrier tape in the direction.

  The component supply method using the tape feeder according to claim 4 is the component supply method using the tape feeder according to claim 3, wherein the convex portion is a carrier tape of the pair of guide surfaces provided in the tape passage. The guide surface on the side where the feed holes are provided is provided at a position upstream of the position where the outer peripheral teeth of the sprocket fit into the feed holes of the carrier tape in the traveling direction of the carrier tape.

  In the present invention, a convex portion that contacts the side surface of the carrier tape traveling in the tape path is provided in the tape path, so that the carrier tape is guided in a direction in which the inclination with respect to the tape path is reduced. Therefore, it is possible to reduce the displacement (supply displacement) of the component at the component supply position, and it is possible to suppress the occurrence of a component suction error by the suction nozzle.

The block diagram of the component mounting apparatus in one embodiment of this invention The side view of the tape feeder with which the component mounting apparatus in one embodiment of this invention is provided The fragmentary perspective view of the tape feeder in one embodiment of this invention The perspective view of the carrier tape with which the tape feeder in one embodiment of this invention is provided The flowchart which shows the procedure of the component mounting operation which the component mounting apparatus in one embodiment of this invention performs The partial enlarged plan view of the tape feeder in one embodiment of this invention The partial enlarged plan view of the tape feeder in one embodiment of this invention The partial enlarged plan view of the tape feeder in one embodiment of this invention

  Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a component mounting apparatus 1 is configured to carry in and position a substrate 2 sent from an upstream process device (not shown) (for example, a solder printer or another component mounting device), and place the substrate 2 on the positioned electrode 3 on the electrode 3. A device that repeatedly executes a series of operations including mounting of a component (electronic component) 4 and transporting the substrate 2 on which the component 4 is mounted to a downstream process side device (for example, another component mounting device, an inspection machine, a reflow furnace, etc.) It is.

  1, the component mounting apparatus 1 is provided on a base, which is provided on a base (not shown) and transports the board 2 and positions it at a predetermined work position (position shown in FIG. 1). A plurality of tape feeders 13 mounted on the feeder base 12, an orthogonal coordinate type head moving robot 14 provided on the base, a mounting head 15 moved in a horizontal plane by the head moving robot 14, and ascending and descending to the mounting head 15 A suction nozzle 16 is provided that is freely rotatable about a vertical axis, a substrate camera 17 is provided on the mounting head 15, and a component camera 18 is provided on the base.

  In FIG. 1, the substrate transport path 11 is composed of a pair of belt conveyors extending in the horizontal direction, and transports the substrate 2 while supporting both ends of the substrate 2 from below.

  2 and 3, the tape feeder 13 is detachably attached to the feeder base 12, and performs a feeding operation of a carrier tape 20 (see also FIG. 4) fed out from a tape reel TR installed outside, thereby feeding a substrate. The component 4 is supplied to the component supply position 13p at the end on the 11th side.

  As shown in FIG. 4, the carrier tape 20 has a number of feed holes 20h arranged at regular intervals in the longitudinal direction and a number of component storage portions 20a arranged at regular intervals in the longitudinal direction. The component 4 is stored in each component storage portion 20a, and a cover tape CT for preventing the component 4 from falling off from the component storage portion 20a is closed on the surface of the carrier tape 20 so as to block the component storage portion 20a. It is pasted.

  In FIG. 2, the tape feeder 13 includes a sprocket 22 and a sprocket drive motor 23 as a sprocket driving means for driving the sprocket 22 inside a main body 21 that is detachably attached to the feeder base 12. In the vicinity of 13p, a tape pressing member 24 is provided so as to be swingable in the vertical direction.

  2 and 3, the sprocket 22 is located at the highest position of its outer peripheral teeth 22 a and is fitted into the feed hole 20 h of the carrier tape 20 from below, and the sprocket 22 is rotationally driven by the sprocket drive motor 23. Then, the carrier tape 20 is pulled by the sprocket 22 and proceeds in the direction from the rear end side to the front end side of the tape feeder 13 (the direction from the left side to the right side in FIG. 2; the direction indicated by the arrow A in FIG. 3). To do. The component supply position 13p is located on the upstream side in the traveling direction of the carrier tape 20 (the right side of the page in FIG. 2) from the position where the outer peripheral teeth 22a of the sprocket 22 are inserted into the feed holes 20h of the carrier tape 20 (tape pulling position G). To do.

  2 and 3, the tape pressing member 24 is provided at a position covering the sprocket 22 from above, and a position corresponding to the component supply position 13p is an opening. As shown in FIG. 3, the tape pressing member 24 has a tape pressing surface 24a which is an upper bottom portion and a pair of guide surfaces 24b which are side portions, and is formed in a U-shaped cross section, and assumes a horizontal posture. At the tape pressing position (the position shown in FIGS. 2 and 3), the upper surface of the main body 21, the tape pressing surface 24a of the tape pressing member 24, and the pair of guide surfaces 24b form a tape path 25 that is a path of the carrier tape 20, The carrier tape 20 advances in the tape passage 25 in a state where both side surfaces are guided by a pair of guide surfaces 24b of the tape pressing member 24.

  2 and 3, a cover tape outlet 13q is provided at a position on the upstream side in the direction of travel of the carrier tape 20 relative to the component supply position 13p of the tape pressing member 24 positioned at the tape pressing position. When the cover tape CT passes through the cover tape outlet 13q, it is peeled off from the carrier tape 20 and drawn upward from the cover tape outlet 13q. Therefore, each component storage portion 20a of the carrier tape 20 is not covered by the cover tape CT when reaching the component supply position 13p, and the component 4 from the component storage portion 20a by the suction nozzle 16 at the component supply position 13p is removed. Removal is possible. The cover tape CT is wound up by a cover tape winding mechanism 26 provided in the main body 21 and is stored in a cover tape storage area 27 in the main body 21 (FIGS. 2 and 3).

  In FIG. 1 and FIG. 2, the suction nozzle 16 provided in the mounting head 15 is positioned by the substrate transport path 11 after vacuum sucking and picking up the component 4 supplied to the component supply position 13 p of each tape feeder 13. The component 4 is mounted on the substrate 2 by releasing the vacuum suction of the component 4 on the electrode 3 of the substrate 2 and detaching the component 4 from the suction nozzle 16.

  In FIG. 1, the substrate camera 17 has an imaging field of view directed downward, and when the substrate 2 is positioned at the working position by the substrate transport path 11, a substrate mark 2 m for detecting the position of the substrate 2 provided on the substrate 2. Is imaged from above.

  In FIG. 1, each component camera 18 has an imaging field of view facing upward, and is picked up by the suction nozzle 16 and picks up an image of the component 4 positioned in the imaging field of view by the movement of the mounting head 15 from below.

  The operation of positioning the substrate 2 by the substrate transport path 11 and positioning to the work position is controlled by the control device 30 (FIG. 1) provided in the component mounting apparatus 1 of the substrate transport path drive mechanism 31 (FIG. 1) including an actuator (not shown). Made by doing.

  The supply of the component 4 to the component supply position 13p by each tape feeder 13 is performed by the control device 30 controlling the operation of the tape feeder drive mechanism 32 (FIG. 1) including the sprocket drive motor 23, the cover tape take-up mechanism 26, and the like. Made by doing.

  The movement operation of the mounting head 15 in the horizontal plane direction is performed by the operation control of the robot drive mechanism 33 (FIG. 1) in which the control device 30 operates the head moving robot 14.

  The raising and lowering of the suction nozzle 16 with respect to the mounting head 15 and the rotation operation around the vertical axis are performed by the control device 30 controlling the operation of a nozzle drive mechanism 34 (FIG. 1) including an actuator (not shown). In the suction (pickup) and suction release (mounting to the substrate 2) operations of the component 4, the control device 30 controls the operation of the suction mechanism 35 (FIG. 1) including an actuator (not shown) and the like, and the vacuum pressure is applied to the suction nozzle 16. And by releasing the supply of the vacuum pressure.

  The image pickup operation control of the board camera 17 and the image pickup operation control of the component camera 18 are performed by the control device 30 (FIG. 1). The image data obtained by the imaging operation of the substrate camera 17 and the image data obtained by the imaging operation of the component camera 18 are respectively sent to the control device 30, and image recognition processing is performed in the image recognition unit 30a (FIG. 1) of the control device 30. Is done.

  When the component mounting operation is performed by the component mounting apparatus 1 having such a configuration, the control device 30 first operates the substrate transport path 11 to receive the substrate 2 sent from the upstream process apparatus. It is carried in and positioned at a predetermined work position (step ST1 shown in FIG. 5).

  After positioning the substrate 2 at the working position by the substrate transport path 11, the control device 30 moves the substrate camera 17 (the mounting head 15) above the substrate 2 and moves the substrate mark 2 m on the substrate 2 to the substrate camera 17. Image recognition is performed by performing imaging, and a positional deviation from the normal position of the substrate 2 on the substrate transport path 11 is calculated (step ST2 shown in FIG. 5).

  After calculating the positional deviation of the substrate 2 in step ST <b> 2, the control device 30 controls the operation of the robot drive mechanism 33 to operate the head moving robot 14 and moves the mounting head 15 above the tape feeder 13. Then, the operation of the tape feeder drive mechanism 32 is controlled to supply the component 4 to the component supply position 13p of each tape feeder 13, while the operation of the nozzle drive mechanism 34 is controlled to connect the suction nozzle 16 to the component of the tape feeder 13. The component 4 supplied to the supply position 13p is brought into contact with the suction mechanism 16 and the vacuum pressure is supplied to the suction nozzle 16 by controlling the operation of the suction mechanism 35 so that the suction nozzle 16 sucks (picks up) the component 4 (see FIG. Step ST3 shown in FIG.

  When the control device 30 causes the suction nozzle 16 to suck the component 4, the control device 30 moves the mounting head 15 so that the component 4 passes above the component camera 18, and causes the component camera 18 to capture the component 4. Recognition is executed (step ST4 shown in FIG. 5). Then, based on the result of the image recognition, the part 4 is inspected for abnormalities (deformation, defect, etc.) and the position of the part 4 with respect to the suction nozzle 16 is grasped. (Shift) is calculated (step ST5 shown in FIG. 5).

  After calculating the suction deviation of the component 4, the control device 30 moves the mounting head 15 so that the component 4 sucked by the suction nozzle 16 is positioned above the substrate 2. Then, by controlling the operation of the nozzle drive mechanism 34, the adsorbed component 4 is soldered by the electrode 3 on the substrate 2 (on this electrode 3, the solder printing machine disposed on the upstream process side of the component mounting apparatus 1). The vacuum pressure supply to the suction nozzle 16 is canceled by controlling the operation of the suction mechanism 35 and the component 4 is mounted on the substrate 2 (step ST6 shown in FIG. 5).

  Here, when mounting the component 4 on the substrate 2 in step ST6, the control device 30 corrects the positional deviation of the substrate 2 obtained in step ST2 and the adsorption deviation of the component 4 obtained in step ST5. 2, the position of the suction nozzle 16 is corrected (including rotation correction).

  When the component 4 is mounted on the substrate 2 in step ST6, the control device 30 determines whether all the components 4 to be mounted on the substrate 2 have been mounted on the substrate 2 (step ST7 shown in FIG. 5). As a result, when it is determined that all the components 4 to be mounted on the board 2 have not been mounted on the board 2, the process returns to step ST3, and the component mounting operation of steps ST3 to ST6 is executed. On the other hand, if it is determined in step ST7 that all the components 4 to be mounted on the substrate 2 have been mounted on the substrate 2, the control device 30 carries the substrate 2 out to the downstream process side device via the substrate transport path 11. (Step ST8 shown in FIG. 5).

  In the component mounting operation by the component mounting apparatus 1 as described above, the sprocket 22 of the tape feeder 13 advances the carrier tape 20 in the tape path 25 in the pulled state, thereby moving the carrier tape 20 in the moving direction of the carrier tape 20 rather than the tape pulling position G. Although the component 4 is supplied to the component supply position 13p located on the upstream side (FIG. 6), the width direction dimension of the tape passage 25 (the distance between the pair of guide surfaces 24b) is slightly larger than the width direction dimension of the carrier tape 20. In addition to being large and free of play, the feed hole 20h of the carrier tape 20 is offset from the central axis L of the carrier tape 20 at a position displaced by a certain distance (distance D shown in FIG. 6) in the width direction. Therefore, the carrier tape 20 is inclined in the horizontal plane with the tape pulling position G as the center, and the carrier tape 20 enters the tape passage 25. In this state, the center line L1 of the row of feed holes 20h of the carrier tape 20 passes through the tape pulling position G and is parallel to the center line of the tape passage 25 as shown in FIG. In the horizontal plane), the tape passage 25 is to be advanced. As a result, as shown in the enlarged view of FIG. 7, the center P of the component 4 in the component storage portion 20a that has reached the component supply position 13p does not coincide with the suction center Q of the suction nozzle 16 in plan view. The center P of the nozzle causes a positional shift (supply shift) with respect to the suction center Q of the suction nozzle 16.

  In order to prevent such a situation where supply deviation becomes excessive and the suction nozzle 16 cannot suck the component 4, the tape feeder 13 according to the present embodiment has a tape passage 25 as shown in FIG. And a convex portion 25a for guiding the carrier tape 20 in a direction in which the inclination α (FIG. 7) of the carrier tape 20 with respect to the tape passage 25 decreases by contacting the side surface of the carrier tape 20 traveling in the tape passage 25. Thus, the positional deviation (supply deviation) of the component 4 at the component supply position 13p is reduced.

  That is, the tape feeder 13 according to the present embodiment contacts the side surface of the carrier tape 20 traveling in the tape passage 25 in the tape passage 25 having a pair of guide surfaces 24b for guiding both side surfaces of the carrier tape 20. In this embodiment, the convex portion 25a for guiding the carrier tape 20 is provided in a direction in which the inclination α of the carrier tape 20 with respect to the tape passage 25 is reduced. In the tape passage 25 having a pair of guide surfaces 24b for guiding both side surfaces of the carrier tape 20, a convex portion 25a that contacts the side surface of the carrier tape 20 traveling in the tape passage 25 is provided. The carrier tape 20 is guided in a direction in which the inclination α of the tape 20 with respect to the tape passage 25 decreases. To do. The convex portion 25a may be provided on the upper surface of the main body portion 21 of the tape feeder 13 in the tape passage 25, or may be provided on the tape pressing surface 24a or the guide surface 24b of the tape pressing member 24. May be.

  Here, as shown in FIG. 6, the distance (play) between the side surface (the right side in FIG. 6) of the carrier tape 20 where the feed hole 20h is provided and the guide surface 24b on the side surface is W. In the case where the distance d from the guide surface 24b at the position (contact position M) where the side surface of the carrier tape 20 contacts the convex portion 25a is equal to the play W, the carrier tape 20 is The tape passage 25 travels in a state where it is not inclined with respect to the passage 25 (a state where the center line L1 and the line L2 coincide). At this time, the center P of the component 4 and the suction center Q of the suction nozzle 16 substantially coincide with each other in plan view, and the suction nozzle 16 can suck the component 4 in the component storage portion 20a. If the part 4 in the part 20a can be sucked, the center P of the part 4 and the suction center Q of the suction nozzle 16 do not necessarily coincide with each other.

  That is, since the distance d from the guide surface 24b of the contact position M does not coincide with the play W, the center line L1 of the row of the feed holes 20h of the carrier tape 20 is a line parallel to the center line of the tape passage 25. Inclination with respect to L2 (the inclination of the center line L1 with respect to the line L2 is the distance S along the traveling direction of the carrier tape 20 from the tape pulling position G to the contact position M and the distance d from the guide surface 24b of the contact position M described above. Accordingly, the center P of the component 4 is shifted from the suction center Q of the suction nozzle 16 by a positional deviation amount ΔX in the width direction (X-axis direction) of the carrier tape 20 or the carrier tape 20 Even if the position shift amount ΔY is shifted in the direction orthogonal to the width direction (the traveling direction of the carrier tape 20; the Y-axis direction) (enlarged view in FIG. 6), these position shift amounts ΔX, If Y is within the range of acceptable values within a range capable of adsorbing component 4 by the suction nozzle 16, respectively, there is no problem (inclination relative to the tape path 25 of the carrier tape 20 is acceptable).

  Here, in order to reduce the inclination α of the carrier tape 20 with respect to the tape passage 25, a feed hole 20h of the carrier tape 20 is provided in the pair of guide surfaces 24b provided in the tape passage 25 as shown in FIG. The convex portion 25a can also be provided at a position on the guide surface 24b on the side closer to the downstream side in the direction of travel of the carrier tape 20 than the tape pulling position G. However, in this case, the carrier tape 20 traveling in the tape passage 25 receives a compressive force from the convex portion 25a by contacting the convex portion 25a, so that the carrier tape 20 in the tape passage 25 is received. There is a risk that the smooth progress of the process may be hindered. On the other hand, when the convex portion 25a is provided on the downstream side in the traveling direction of the carrier tape 20, the force that the carrier tape 20 receives from the convex portion 25a is a tensile force. The smooth advance of the carrier tape 20 is not hindered, and is more preferable than the case where the convex portion 25a is provided downstream of the tape pulling position G.

  As described above, in the tape feeder 13 and the component supply method using the tape feeder 13 shown in the present embodiment, the tape feeder 25 contacts the side surface of the carrier tape 20 that travels in the tape passage 25. Since the convex portion 25a is provided so that the carrier tape 20 is guided in a direction in which the inclination α with respect to the tape passage 25 is reduced, the position shift (supply shift) of the component 4 at the component supply position 13p. And the occurrence of a suction error of the component 4 by the suction nozzle 16 can be suppressed.

  Provided are a tape feeder and a component supply method using a tape feeder capable of reducing a component displacement (supply displacement) at a component supply position.

4 parts 13 tape feeder 13p parts supply position 20 carrier tape 20h feed hole 22 sprocket 22a outer peripheral teeth 23 sprocket drive motor (sprocket drive means)
24b Guide surface 25 Tape passage 25a Convex part

Claims (4)

A tape passage having a pair of guide surfaces for guiding both side surfaces of the carrier tape, a sprocket having outer teeth fitted in feed holes provided at regular intervals on the carrier tape in the tape passage, and rotating the sprocket A tape feeder having sprocket driving means for advancing the carrier tape in the tape path and supplying parts provided side by side on the carrier tape to the parts supply position,
A tape feeder characterized in that a convex portion for guiding the carrier tape in a direction in which the inclination of the carrier tape with respect to the tape passage is reduced by contacting the side surface of the carrier tape traveling in the tape passage is provided in the tape passage. .   The convex portion is a guide surface on the side where the feed hole of the carrier tape is provided in the pair of guide surfaces provided in the tape passage, and a position where the outer peripheral teeth of the sprocket fit into the feed hole of the carrier tape. 2. The tape feeder according to claim 1, wherein the tape feeder is provided at a position upstream of the carrier tape in the traveling direction. A tape passage having a pair of guide surfaces for guiding both side surfaces of the carrier tape, and a sprocket having outer peripheral teeth fitted in feed holes provided at regular intervals on the carrier tape in the tape passage. A component feeding method by a tape feeder comprising: a sprocket driving means for advancing a carrier tape in a tape path by rotating and sprocket driving means for feeding to a component feeding position provided side by side on the carrier tape;
A tape feeder that guides the carrier tape in a direction in which the inclination of the carrier tape with respect to the tape path is reduced by providing a convex portion in contact with the side surface of the carrier tape traveling in the tape path in the tape path. Parts supply method by.   The convex portion is a guide surface on the side where the feed hole of the carrier tape is provided in the pair of guide surfaces provided in the tape passage, and a position where the outer peripheral teeth of the sprocket fit into the feed hole of the carrier tape. 4. The method of supplying parts by a tape feeder according to claim 3, wherein the parts are provided at a position upstream of the carrier tape in the direction of travel.

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