JP4016918B2 - Tape feeder - Google Patents

Description

  The present invention relates to a tape feeder that pitches an electronic component held on a tape and supplies the electronic component to a pickup position of an electronic component mounting apparatus.

  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 of a nozzle of a transfer head. In this method, a tape for holding an electronic component is pulled out from a supply reel, and pitch-fed in synchronization with the mounting timing of the electronic component to be supplied to a nozzle. A top tape is affixed to the upper surface of the tape to protect the electronic components and prevent them from falling off, and the top tape is peeled off from the upper surface of the base tape before being sent to the pickup position.

The peeled top tape is folded back in the direction opposite to the tape feeding direction, is sandwiched and fed between a pair of gears for feeding, and is guided into a tape storage container that houses the top tape (see, for example, Patent Document 1). When the tape storage container is filled with the top tape, a tape discharging operation for opening the tape storage container and taking out the internal top tape is performed.
Japanese Patent Application Laid-Open No. 2002-299887

  However, when the top tape is fed, troubles due to foreign matters such as electronic components that have come off the tape tend to be caught in the feeding gear. That is, when an electronic component is sandwiched in the meshing portion of the gear, the electronic component rotates with the gear while being pushed into the tooth gap, and is engaged with a drive gear that transmits rotation from the narrow gap portion or the motor in the middle of the rotation. An abnormal operation may occur, which may hinder stable feeding of the top tape. This problem is particularly noticeable when supplying small-sized electronic components.

  Accordingly, an object of the present invention is to provide a tape feeder capable of stably feeding a top tape and preventing abnormal operation.

The tape feeder of the present invention is a tape feeder that feeds an electronic component to a pickup position of an electronic component mounting apparatus by pitch-feeding a tape holding the electronic component, and covers the electronic component on the upper surface of the tape and attaches it. The top tape that is peeled off from the upper surface of the tape just before the pick-up position is sandwiched between a pair of roller-shaped rotating bodies having meshing teeth on the outer peripheral surface and fed in the direction opposite to the tape feeding direction. means and includes a tape receiving container receiving accept top tape sent by the top tape feeding means, the teeth Mizosun method of two adjacent engaging teeth of the roller-shaped rotary body, the electron supply target It is larger than the maximum dimension of the part.

According to the present invention, the roller-shaped rotary body teeth Mizosun method of meshing teeth of which constitute the top tape feeding means for feeding the top tape into the tape container, by setting larger than the maximum dimension of the electronic component supply target The electronic parts are not sandwiched between the meshing teeth when the tape is fed, and the top tape can be stably fed to prevent abnormal operation.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 is a perspective view of an electronic component mounting apparatus to which a tape feeder according to an embodiment of the present invention is mounted, FIG. 2 is a side view of the tape feeder according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 and FIG. 5 are operation explanatory views of a top tape feeding mechanism of a tape feeder according to an embodiment of the present invention, and FIG. 6 is an illustration of a tape feeder according to an embodiment of the present invention. It is a fragmentary sectional view of the rotation feed member in a top tape feed mechanism.

  First, an electronic component mounting apparatus will be described with reference to FIG. In FIG. 1, the electronic component mounting apparatus 1 includes two mounting stages 2. The substrate 4 is carried into the upstream mounting stage 2 from the substrate carry-in port 3 provided on the side surface. An electronic component picked up from the component supply unit 5 is mounted on the substrate 4 positioned on a conveyance path (not shown).

  A plurality of tape feeders 8 are attached to the component supply unit 5. A plurality of tape feeders 8 are arranged in parallel on a feeder base 6 provided in the component supply unit 5, and a tape holding electronic components is drawn from a supply reel 9 mounted on a carriage 7 and pitch-fed. As a result, the electronic component is supplied to the pickup position of the electronic component on each mounting stage 2.

  Next, the overall structure of the tape feeder 8 will be described with reference to FIG. As shown in FIG. 2, the tape feeder 8 is mounted on the upper surface of the feeder base 6 along the lower surface of the main body portion 8 a, and a locking portion 8 b provided projecting downward from the main body portion 8 a is attached to the feeder base 6. The tape feeder 8 is fixed by engaging with the end. The locking portion 8b has a built-in connector for connecting electrical wiring such as a power source and control signal of the tape feeder 8 to the electrical circuit of the electronic component mounting apparatus 1, and the tape feeder 8 is attached to the feeder base 6. As a result, the electrical connection is completed.

  In FIG. 2, the sprocket 11 is arrange | positioned at the front-end part (right side in FIG. 2) of the tape feeder 8. In FIG. The teeth of the sprocket 11 mesh with a tape feed hole 10d (see FIG. 3) provided on the tape 10 at a constant pitch, and the sprocket 11 is rotated by the tape feed mechanism 12 so that the top tape is placed on the base tape 10b. The tape 10 having the configuration in which 10a is adhered is pitch-fed. By this tape feeding, the tape 10 is pulled out from the supply reel 9. The drawn tape 10 is guided by a tape guide 16 provided at the rear end portion of the tape feeder 8, guided into the main body 8a from the tape introduction hole 8c, and fed forward along the tape feed path 8d.

  The tip of the tape feeder 8 is a position for picking up electronic components by the transfer head 17, and the tape 10 that has been fed is pitch-fed under the pressing member 13 provided on the top surface of the tip. In the middle of this pitch feed, the electronic component 18 held in the recess 10 c of the base tape 10 b is picked up by the transfer head 17 through the opening 13 a provided in the pressing member 13. Prior to picking up the electronic component 18, the top tape 10 a is peeled from the upper surface of the base tape 10 b, folded back, and stored in the tape storage container 15 by the top tape feeding mechanism 14.

  Next, the tape feeding mechanism 12 and the top tape feeding mechanism 14 will be described with reference to FIGS. 3, 4, 5, and 6. In FIG. 3, the sprocket 11 that pitch-feeds the tape 10 is rotationally driven by a motor 20. The sprocket 11 performs an intermittent rotation operation corresponding to the pitch feed operation, and the positioning of the rotation stop position during the intermittent rotation is mechanically performed by the positioning mechanism 23 or is stopped at a specified angle by controlling the rotation of the motor 20. Is done. Pins 11 a are provided at a constant pitch on the outer periphery of the sprocket 11, and tape feeding is performed by the sprocket 11 rotating with the pins 11 a fitted in holes 10 d provided in the tape 10.

  A peeling member 13b is disposed in front of the pickup position by the transfer head 17, and the top tape 10a is peeled by the peeling member 13b from the upper surface of the tape 10 fed forward (rightward in the drawing) and folded back. It is. The folded top tape 10a is fed into the tape container 15 by the rotary feed members 33 and 34 of the top tape feed mechanism 14. The rotational drive of the rotary feed members 33 and 34 is performed by transmitting the rotation of the motor 30 to the rotary feed member 34 via the bevel gear 31 and the transmission gear member 32.

As shown in FIG. 4A, the rotary feed members 33 and 34 are configured such that spur teeth 33a and 34a are formed as meshing teeth on the outer periphery of the roller-shaped rotating body, respectively. Here, the spur tooth arrangement in the rotary feed members 33 and 34 is such that the spur teeth 34a (33a) are removed one by one from the normal spur gear as shown in FIG. 6 (a). . Then, as shown in FIG. 6 (b), two adjacent spur Mizosun method teeth 34a (two adjacent spur 34a, interval 34a) B is the maximum dimension b of the electronic component 18 of the supply target Is also set to be large. For example, in a rectangular part it called 1005 parts, part size is 0.5 mm, tooth Mizosun method B is set to a dimension with a margin relative to the size (e.g., 1.5 times or more).

  When the transmission gear member 32 rotates in a state where the top tape 10a is sandwiched between the flat teeth 33a and 34a, the top tape 10a is surely fed into the tape storage container 15 without slipping. The motor 30, the transmission gear member 32, and the rotation feeding members 33 and 34 are sandwiched between a pair of roller-shaped rotating bodies having meshing teeth provided on the outer peripheral surface thereof, and are opposite to the tape feeding direction to the pickup position. It is a top tape feeding means that feeds in the direction.

When the top tape 10a is fed by the rotary feed members 33 and 34, a problem is likely to occur due to the electronic parts 18 and other solid foreign substances that have come off the tape being caught in the meshing portions of the flat teeth 33a and 34a. In this embodiment, teeth Mizosun method B of two adjacent spur 34a as described above, since it is set larger than the maximum dimension b of the electronic component 18 of the supply target, the tape for some reason Even if the electronic component 18 that has fallen off falls to the meshing portion of the flat teeth 33a, 34a, the foreign material bite in which the electronic component 18 is pushed into the tooth gap between the two flat teeth 34a and fixed does not occur. .

  Accordingly, various troubles caused by the rotation of the rotary feed member 34a while the foreign object is still caught, that is, the electronic component 18 enters the narrow gap portion of the housing portion of the top tape feed mechanism 14 in the middle of the rotation. Is not stopped, and further, abnormal operation due to the electronic component 18 being engaged with the meshing portion of the transmission gear member 32 with the spur tooth 32a does not occur.

  A tension mechanism 35 having a movable tension roller 36 is disposed on the front side of the rotary feed members 33 and 34. The tension roller 36 is held by a lever member 38a having a fulcrum that is coaxial with the guide roller 37, and the peeled top tape 10a goes around the upper side of the guide roller 37 and the lower side of the tension roller 36 and is guided backward. . A spring 39 is coupled to the arm 38b integrated with the lever member 38a, and the lever member 38a and the arm 38b are always urged downward by the spring 39. As a result, tension is applied to the top tape 10a by the tension roller 36.

The operation of the tension mechanism 35 will be described with reference to FIG. When the top tape 10a is slackened at the position of the tension mechanism 35, the tension roller 36 moves downward. At the same time, the arm member 38b is rotated by the urging force of the spring 39, and the dog 38c provided at the tip is displaced downward. Then, the displacement of the top tape 10a is detected by detecting this displacement by the photoswitch 40. If slack is detected, the motor 30 is immediately driven to rotate, whereby the slack top tape 10a is fed into the tape container 15 and a predetermined tape tension is maintained.

  Next, a top tape peeling mechanism that prevents the top tape 10a fed into the tape container 15 from being entangled with the rotary feed members 33 and 34 will be described with reference to FIG. As shown in FIG. 5, two grooves 33b and 34b are formed in the circumferential direction on the outer peripheral surface of the rotary feed members 33 and 34 on which the flat teeth 33a and 34a are formed. The end portions 41a and 42a of the claw members 41 and 42 are inserted into the groove portions 33b and 34b from the tape container 15 side with a slight gap so as not to hinder the rotation of the rotary feed members 33 and 34. Yes.

  As shown in FIG. 5 (a), the top tape 10a that is sandwiched between the flat teeth 33a and 34a of the rotary feed members 33 and 34 and fed into the tape container 15 is thin and flexible. Even after the flat teeth 33a and 34a are pulled out of the pinched state, they tend to move along the outer periphery of one of the rotary feed members 33 and 34 as the flat teeth rotate.

  At this time, since the tip portions 41a and 42a of the claw members 41 and 42 are fitted in the groove portions 33b and 34b provided on the outer periphery, the top tape 10a moves in the outer peripheral direction of the rotary feed members 33 and 34. Is blocked by the tip portions 41a, 42a. Then, the top tape 10 a moves along the claw members 41 and 42 and is peeled off from the outer periphery of the rotary feed members 33 and 34. As a result, the top tape 10a is entangled with the rotary feed members 33 and 34, thereby preventing jamming that makes the tape feed impossible.

As explained above, in the tape feeder 8 in this embodiment, spur 33a of rotary feed member 33 for feeding the top tape into the tape container 15, 34a teeth Mizosun method of electron supply target By setting it to be larger than the maximum dimension of the component, the electronic component is not sandwiched between the meshing teeth when the tape is fed, and the top tape can be stably fed to prevent an abnormal operation.

  The tape feeder of the present invention has an effect of preventing abnormal operation by stably feeding the top tape without being in a state where the electronic component is sandwiched between the meshing teeth when the tape is fed. The present invention can be used in the field of feeding an electronic component held on a tape to a pickup position of an electronic component mounting apparatus by pitch feeding.

The perspective view of the electronic component mounting apparatus with which the tape feeder of one embodiment of this invention is mounted | worn The side view of the tape feeder of one embodiment of the present invention Mechanism explanatory drawing of the tape feeder of one embodiment of the present invention Operation | movement explanatory drawing of the top tape feed mechanism of the tape feeder of one embodiment of this invention Operation | movement explanatory drawing of the top tape feed mechanism of the tape feeder of one embodiment of this invention The fragmentary sectional view of the rotation feed member in the top tape feed mechanism of the tape feeder of one embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electronic component mounting apparatus 6 Feeder base 8 Tape feeder 9 Supply reel 10 Tape 10a Top tape 11 Sprocket 12 Tape feed mechanism 14 Top tape feed mechanism 15 Tape storage container 17 Transfer head 30 Motor 32 Transmission gear member 33, 34 Rotation feed member

Claims (1)

A tape feeder that feeds an electronic component to a pickup position of an electronic component mounting apparatus by pitch-feeding a tape holding the electronic component, and is attached to the upper surface of the tape so as to cover the electronic component and before the pickup position. Top tape feeding means for sandwiching the top tape peeled off from the upper surface of the tape between a pair of roller-shaped rotating bodies provided with meshing teeth on the outer circumferential surface and feeding the tape in the direction opposite to the tape feeding direction, and the top tape feeding and a tape receiving container receiving accept top tape sent by means of teeth Mizosun method of two adjacent engaging teeth of the roller-shaped rotary body is greater than the maximum dimension of the electronic component supply target A tape feeder characterized by that.

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