JP2014067848A - Tape feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape feeder capable of preventing troubles occurring on an apparatus caused from a foreign matter such as minute component entering into a movable part of a drive mechanism while handling minute components.SOLUTION: A sprocket drive mechanism of a tape feeder includes: a sprocket drive gear 22 coaxially coupled with a sprocket 13 for pitch-feeding a carrier tape 15 at the side thereof, which is engaged with a drive gear which transmits rotation from a rotation drive source to transmit the rotation to the sprocket 13; and a circumferential groove 24 which is formed in a circumferential direction in a coupling portion of the sprocket 13 below an opening gap G between a side face of a main body 5a forming a tape travelling path and a side face of the sprocket 13. With this, a foreign matter such as a minute electronic component 16 which falls via the opening gap G can be caught by the circumferential groove 24.

Description

  The present invention relates to a tape feeder that supplies an electronic component held on a carrier tape to a pickup position by a mounting head.

  In an electronic component mounting apparatus, a method using a tape feeder is known as a method for supplying an electronic component to a pickup position by a mounting head. In this method, the carrier tape holding the electronic component is pulled out from the supply reel and pitch-fed to supply the electronic component to the mounting head in synchronization with the mounting timing. As a tape feeding mechanism for pitch-feeding a carrier tape, a method of intermittently rotating a sprocket in which pins engaged with feeding holes provided at a constant pitch on the carrier tape are provided on the outer periphery is widely used (for example, Patent Documents). 1).

  In the prior art shown in this patent document example, a structure is adopted in which the upper outer periphery of a driving ratchet that drives a sprocket is covered with a ring-shaped cover member. As a result, it is possible to prevent a malfunction caused by a picking error in the picking up operation of the electronic component by the picking nozzle of the mounting head, and the picked-up electronic component falling and getting caught in the drive mechanism for rotationally driving the sprocket. ing.

Japanese Patent Laid-Open No. 10-4286

  However, the above-described prior art has the following disadvantages. That is, since the drive mechanism includes a movable part, it is inevitable to secure a slight clearance between the cover member and the movable part. For this reason, in the present situation where miniaturization of electronic parts has progressed, there is a possibility that foreign matters such as fine parts dropped due to a suction error or the like may enter even with such a small gap. Then, if the foreign matter that has entered does not carry out and bites into the drive mechanism, normal tape feeding is not performed, causing trouble in the apparatus. As described above, in the conventional tape feeder, when a fine part is targeted, it is difficult to effectively prevent a device trouble caused by foreign matters such as the fine part entering the movable part of the drive mechanism. There was a problem.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tape feeder that can prevent a device trouble caused by a foreign material such as a fine component entering a movable part of a drive mechanism even when the subject is a fine component. To do.

  The tape feeder of the present invention is a tape feeder that feeds an electronic component to a pickup position by a mounting head by pitch-feeding a carrier tape holding an electronic component, and the tape running guides the carrier tape from the lower surface. A sprocket that pitch-feeds the carrier tape by intermittently rotating in a state where the feed pin is engaged with a path and a feed hole formed in the carrier tape and arranged near the pickup position, and in the vicinity of the pickup position. A sprocket that is coupled to a tape pressing member that guides the carrier tape on the tape running path from the upper surface side, and a drive gear that is coaxially disposed on the side of the sprocket and that transmits rotation from a rotational drive source, and transmits rotation to the sprocket. Drive gear and side end surface of the tape running path It is located below the opening gap that exists between the side end surfaces of the sprocket, and includes a circumferential groove provided in the circumferential direction at the coupling portion between the sprocket and the sprocket drive gear, and falls through the opening gap. The foreign matter is captured by the circumferential groove.

  According to the present invention, the sprocket is connected to the side of the sprocket for pitch-feeding the carrier tape in a coaxial arrangement and meshes with the drive gear that transmits the rotation from the rotational drive source to transmit the rotation to the sprocket. By providing a circumferential circumferential groove in the coupling part below the opening gap that exists between the side end face of the tape running path and the side end face of the sprocket, foreign matter such as fine parts that have fallen through the opening gap can be removed. It can be captured by the circumferential groove, and even when the target is a fine part, it is possible to prevent device troubles caused by foreign matters such as the fine part entering the movable part of the drive mechanism.

The top view of the component mounting apparatus of one embodiment of this invention The fragmentary sectional view of the component mounting apparatus of one embodiment of the present invention Structure explanatory drawing of the tape feeder of one embodiment of this invention Structure explanatory drawing of the sprocket drive mechanism in the tape feeder of one embodiment of this invention Explanatory drawing of the foreign material discharge | emission function in the tape feeder of one embodiment of this invention

  Next, embodiments of the present invention will be described with reference to the drawings. First, the structure of the component mounting apparatus 1 will be described with reference to FIGS. FIG. 2 partially shows the AA cross section in FIG. In FIG. 1, a substrate transport mechanism 2 is disposed in the X direction (substrate transport direction) at the center of the base 1a. The substrate transport mechanism 2 transports the substrate 3 supplied from the upstream device and subjected to component mounting work by the device in the X direction and positions it at the component mounting work position. Component supply units 4 are arranged on both sides of the substrate transport mechanism 2, and each component supply unit 4 is provided with a plurality of tape feeders 5 serving as component supply means. The tape feeder 5 has a function of supplying an electronic component to a pickup position by a mounting head 9 described below by pitch-feeding a carrier tape holding an electronic component to be mounted.

  A Y-axis movement table 7 having a linear drive mechanism is disposed at one end in the X direction on the upper surface of the base 1a. The Y-axis movement table 7 is similarly provided with a linear drive mechanism. Two X-axis moving tables 8 are coupled so as to be movable in the Y direction. A mounting head 9 is mounted on each of the two X-axis moving tables 8 so as to be movable in the X direction. The mounting head 9 is a multiple-type head having a plurality of holding heads. At the lower end of each holding head, as shown in FIG. 9a is attached.

  By driving the Y-axis movement table 7 and the X-axis movement table 8, the mounting head 9 moves in the X direction and the Y direction. Thereby, the two mounting heads 9 take out the electronic component 16 (see FIG. 3) from the pick-up position of the tape feeder 5 of the corresponding component supply unit 4 by the suction nozzle 9a, and are positioned on the substrate transport mechanism 2. Mounted at the mounting point. The Y-axis movement table 7, the X-axis movement table 8, and the mounting head 9 constitute a mounting drive mechanism 12 that transfers and mounts the electronic component 16 on the substrate 3 by moving the mounting head 9 that holds the electronic component 16.

  A component recognition camera 6 is disposed between the component supply unit 4 and the corresponding substrate transport mechanism 2. When the mounting head 9 that has taken out the electronic component 16 from the component supply unit 4 moves above the component recognition camera 6, the component recognition camera 6 captures and recognizes the electronic component 16 that is held by the mounting head 9. . Mounted on the mounting head 9 are substrate recognition cameras 10 that are positioned on the lower surface side of the X-axis moving table 8 and move together with the mounting head 9. As the mounting head 9 moves, the substrate recognition camera 10 moves above the substrate 3 positioned by the substrate transport mechanism 2 and images and recognizes the substrate 3. In the component mounting operation on the substrate 3 by the mounting head 9, the mounting position correction is performed in consideration of the recognition result of the electronic component 16 by the component recognition camera 6 and the substrate recognition result by the substrate recognition camera 10.

  As shown in FIG. 2, a carriage 11 in which a plurality of tape feeders 5 are previously mounted on a feeder base 11 a is set in the component supply unit 4. The position of the carriage 11 is fixed in the component supply unit 4 by clamping the feeder base 11a to the fixed base 1b provided on the base 1a by the clamp mechanism 11b. The carriage 11 holds a supply reel 11c that stores a carrier tape 15 holding electronic components in a wound state. The carrier tape 15 drawn out from the supply reel 11c is pitch-fed by the tape feeder 5 to the pickup position by the suction nozzle 9a.

  Next, the configuration and function of the tape feeder 5 will be described with reference to FIG. As shown in FIG. 3, the tape feeder 5 includes a main body 5a and a mounting portion 5b protruding downward from the lower surface of the main body 5a. In a state where the tape feeder 5 is mounted with the lower surface of the main body portion 5a along the feeder base 11a, the connector portion 5c provided in the mounting portion 5b is fitted into the feeder base 11a. As a result, the tape feeder 5 is fixedly mounted on the component supply unit 4, and the tape feeder 5 is electrically connected to the control device 20 of the component mounting apparatus 1.

  Inside the main body 5a, there is provided a tape running path 5d for guiding the carrier tape 15 drawn from the supply reel 11c and taken into the main body 5a from the lower surface. The tape running path 5d is provided in a path from a tape inlet provided at the rear end of the main body 5a to a pickup position provided at the front end. In the carrier tape 15, a base pocket 15a constituting the tape body is provided with a component pocket 15b, which is a concave portion for housing the electronic component 16, and a feed hole 15d for pitch feeding the carrier tape 15 at a predetermined pitch. It becomes the composition. The upper surface of the base tape 15a is sealed with a top tape 15e so as to cover the component pocket 15b in order to prevent the electronic component 16 from falling off the component pocket 15b.

  In the main body 5a, a tape feeding portion 17 for pitch feeding the carrier tape 15 is incorporated. The tape feed unit 17 includes a tape feed motor 19 that rotationally drives the sprocket 13 disposed in the vicinity of the pickup position at the tip of the tape running path 5d and a feeder control unit 18 that controls the tape feed motor 19. On the outer periphery of the sprocket 13, feed pins 13 a that fit into feed holes 15 d formed in the carrier tape 15 are provided at a constant pitch. With these feed pins 13 a engaged with the feed holes 15 d, the tape By driving the feed motor 19 to rotate the sprocket 13 intermittently, the carrier tape 15 is pitch-fed downstream.

  On the upper surface side of the main body 5a in the vicinity of the sprocket 13, a pressing member 14 for pressing and guiding the carrier tape 15 from the upper surface side is disposed. The holding member 14 is provided with a suction opening 14a corresponding to a pickup position by the suction nozzle 9a. The upstream end of the suction opening 14a is a top tape peeling portion 14b for peeling the top tape 15e. That is, in the process in which the carrier tape 15 travels below the pressing member 14, the top tape 15e circulates around the top tape peeling portion 14b and is drawn to the upstream side, so that the top tape 15e becomes the base tape on the upstream side of the pickup position. It is peeled off from 15a, folded back to the upstream side, sent into a tape collecting part provided in the main body part 5a, and collected. As a result, the electronic component 16 in the component pocket 15b is exposed upward in the suction opening 14a, and the component can be taken out by the suction nozzle 9a of the mounting head 9.

  Next, the configuration of the sprocket drive mechanism will be described with reference to FIG. FIG. 4B shows an AA cross section in FIG. A sprocket drive gear 22 that meshes with a gear 21 a constituting the speed reduction mechanism 21 and transmits rotation to the sprocket 13 is coupled to the side of the sprocket 13 by a connecting shaft 23 in a coaxial arrangement. The speed reduction mechanism 21 includes a gear 21b that meshes with a tape feed motor 19 that is a rotational drive source. By driving the tape feed motor 19, the sprocket 13 is rotationally driven through the speed reduction mechanism 21 at a predetermined speed reduction ratio. The

  As shown in FIG. 4B, the tape running path 5d in the vicinity of the pickup position is provided in the main body 5a extending above the sprocket 13, and the side end surface of the main body 5a and the side of the sprocket 13 at this position. A minute opening gap G is provided between the end faces to avoid contact interference when the sprocket 13 is rotationally driven. Below the opening gap G, a connecting boss portion 22a constituting a coupling portion between the sprocket 13 and the sprocket drive gear 22 is positioned in a form that forms a circumferential groove 24 provided in the circumferential direction of the sprocket drive gear 22. doing. Here, the connecting boss portion 22a is formed by cutting deeper than the tooth bottom of the sprocket drive gear 22, and the depth d1 of the circumferential groove 24 is deeper than the depth d2 of the tooth bottom of the sprocket drive gear 22. It has become.

  Next, the foreign matter discharging function in the sprocket drive mechanism shown in FIG. 4 will be described with reference to FIG. The electronic component 16 to be supplied to the tape feeder 5 shown in the present embodiment includes a minute component (for example, 0.2 mm), and in the component pickup operation for such a minute component. A pick-up mistake in which the electronic component 16 drops off from the suction nozzle 9a due to a suction failure or the like is likely to occur.

  As shown in FIG. 5A, the electronic component 16 dropped due to a pickup mistake is provided with a pin relief opening 14c provided to prevent interference with the feed pin 13a or a pickup opening 14a for picking up the component. Or the like (arrow a). The electronic component 16 that has fallen and entered the sprocket drive mechanism in this way passes through an opening gap G between the main body 5a that forms the tape running path 5d and the sprocket 13 depending on the size and shape of the electronic component 16. In addition, there is a possibility of further entering the back of the sprocket drive mechanism.

  If such a fine electronic component 16 or other fine foreign matter enters and stays in the sprocket drive mechanism, it may be caught in the movable part of the drive mechanism and impair the normal operation function. In the tape feeder 5 shown in the present embodiment, the foreign matter (here, the minute electronic component 16) that has entered the sprocket drive mechanism through the opening gap G is removed by the following countermeasure. That is, as shown in FIG. 5A, since the circumferential groove 24 is located below the opening gap G, the foreign matter dropped through the opening gap G is captured by the circumferential groove 24. Here, since the depth d1 of the circumferential groove 24 is deeper than the depth d2 of the tooth bottom of the sprocket drive gear 22, the fallen foreign matter is reliably captured without being caught in the sprocket drive gear 22.

  Next, the foreign matter falling into the circumferential groove 24 and captured by the circumferential groove 24 is rotated by the rotation of the sprocket drive gear 22 (arrow b), as shown in FIG. 5B, and the outer peripheral surface 22b of the connecting boss portion 22a. Is moved downward (arrow c) and dropped downward, and is removed from the circumferential groove 24. The foreign matter captured and removed by the circumferential groove 24 in this way falls into the foreign matter discharge gap 25 provided below the sprocket 13 as shown in FIG. When the amount of foreign matter staying in the portion 25 increases, the foreign matter is discharged through the foreign matter discharge opening 26 provided on the feeder side plate (arrow d).

  As described above, the tape feeder 5 shown in the present embodiment is coupled to the side of the sprocket 13 that pitch-feeds the carrier tape 15 in a coaxial arrangement, and transmits the rotation from the tape feed motor 19 that is a rotational drive source. A circumferential circumferential groove 24 is formed at the joint between the sprocket 13 and the sprocket drive gear 22 that meshes with the gear and transmits the rotation to the sprocket 13, and the side end surface of the main body 5 a that forms the tape running path 5 d and the sprocket 13. It is provided below the opening gap G existing between the side end surfaces. As a result, foreign matters such as the fine electronic components 16 that have fallen through the opening gap G can be captured by the circumferential groove 24, and even when the fine components are targeted, the foreign matters such as the fine components are driven by the drive mechanism. It is possible to prevent troubles caused by entering the movable part of the apparatus.

  The tape feeder of the present invention has an effect that even when a fine part is targeted, it is possible to prevent an apparatus trouble caused by foreign matters such as the fine part entering the movable part of the drive mechanism. This is useful in the component mounting field in which components supplied by a feeder are mounted on a substrate.

DESCRIPTION OF SYMBOLS 1 Component mounting apparatus 3 Board | substrate 4 Component supply part 5 Tape feeder 9 Mounting head 9a Adsorption nozzle 12 Mounting drive mechanism 13 Sprocket 15 Carrier tape 16 Electronic component 17 Tape feed part 19 Tape feed motor 21 Deceleration mechanism 22 Sprocket drive gear 24 Circumferential groove 25 Foreign matter discharge gap 26 Foreign matter discharge opening

Claims (4)

A tape feeder that feeds electronic components to a pickup position by a mounting head by pitch-feeding a carrier tape holding electronic components,
A tape running path for guiding the carrier tape running from the lower surface;
A sprocket that pitch-feeds this carrier tape by intermittently rotating in a state where a feed pin is engaged with a feed hole formed in the carrier tape that is arranged in the vicinity of the pickup position;
A tape pressing member that guides the carrier tape on the tape traveling path from the upper surface side in the vicinity of the pickup position;
A sprocket drive gear that is coupled to the side of the sprocket in a coaxial arrangement, meshes with a drive gear that transmits rotation from a rotation drive source, and transmits rotation to the sprocket;
A circumferential groove provided in a circumferential direction at a coupling portion between the sprocket and the sprocket drive gear, located below an opening gap existing between a side end surface of the tape running path and a side end surface of the sprocket. ,
A tape feeder, wherein foreign matter dropped through the opening gap is captured by the circumferential groove.   The tape feeder according to claim 1, wherein a depth of the circumferential groove is deeper than a depth of a tooth bottom of the sprocket drive gear.   3. The tape feeder according to claim 1, wherein the sprocket driving gear rotates and removes foreign matter that has fallen through the opening gap and is captured by the circumferential groove. .   The tape feeder according to any one of claims 1 to 3, further comprising a foreign matter discharge gap for discharging the foreign matter captured by the circumferential groove to the outside of the tape feeder.

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