JPH05275890A - Tape feeder - Google Patents

Abstract

PURPOSE:To eliminate the unevenness of the sprocket rotation angle and prevent electronic part pickup errors by providing a pin which is freely inserted into/ extracted from pin holes formed on the side of the sprocket. CONSTITUTION:When a depression lever 11 is depressed by a depressor 13, both drive levers 6 and 7 are swung, which rotates a sprocket 5 in the direction of the solid line arrow by a pitch, and feeds a tape 4 mounted with electronic parts by a pitch. When a driver 29 is moved up by the swing of the drive lever 7, a pin 25 is extracted from a pin hole 20; when the driver 29 is moved down, the pin 25 is inserted into a pin hole 20, stopping the rotation of the sprocket 5. As mentioned above, inserting/extracting the pin 25 into/from pin holes 20 in interlock with the pitch rotation of the sprocket 5 makes constant the angle of the sprocket pitch rotation. This feeds a tape 4 by a constant pitch and stops a chip P at a pickup position Q with accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder,
More specifically, the rotation angle of the sprocket is eliminated, the pitch feed amount of the electronic component storage tape is kept constant, and the electronic head can be reliably picked up by the transfer head.

[0002]

2. Description of the Related Art A tape feeder is widely used as a chip supplying means applied to a chip mounter for automatically mounting electronic parts such as IC and LSI (hereinafter referred to as "chip") on a substrate.

FIG. 4 is a side view of a main part of a tape feeder according to the conventional means. Reference numeral 101 denotes a base member, and a sprocket 10 for feeding an electronic component storage tape 102 on the base member 101 at a pitch is provided at a front portion of the base member 101.
3 is provided. A first drive lever 104 for rotating the sprocket 103 by a pitch is attached to the sprocket 103, and a second drive lever 104 is attached to the drive lever 104.
The drive lever 105 is connected by a pin 106. This tape feeder has drive levers 104 and 105.
The electronic component storage tape 102 is pitch-fed in the direction of the arrow by swinging the sprocket 103 to rotate the sprocket 103 at a pitch, and at the pickup position Q, the transfer head 10 is moved.
The chip P is picked up by the nozzle 108 of No. 7 and transferred and mounted on the substrate S.

[0004]

By the way, since the sprocket 103 is pitch-rotated at a high speed as the mounting speed of the electronic component mounting apparatus is increased, the sprocket 103 is rotated too much due to the inertia of the pitch rotation and the rotation angle is increased. Therefore, there is a problem that the pitch feed amount of the tape 102 becomes excessively large, the chip P goes too far to the position shown by the chain line in the figure, and a pickup error of the chip P occurs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a tape feeder capable of eliminating the deviation of the rotation angle of the sprocket and eliminating the pick-up error of the electronic component by the transfer head.

[0006]

To this end, according to the present invention, a sprocket is formed with a pin hole along a circumferential direction, and a swinging device is provided with a pin which is removably engaged with the pin hole. In order to engage and disengage this pin with the pin hole by providing a lever and interlocking with the pitch rotation of the sprocket,
A drive element for swinging the swing lever is provided so as to be interlocked with the drive lever.

[0007]

According to the above construction, the oscillating body oscillates in synchronism with the pitch rotation of the sprocket by the drive lever, and the oscillating body pin is engaged with the sprocket pin hole to forcibly stop the sprocket. Stopped at the position. Therefore, the sprocket rotates properly at a fixed angle, and while the tape is fed at a fixed pitch, the chip is properly stopped at the pickup position and the transfer head can reliably pick up the chip.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a side view of a tape feeder according to the present invention. Reference numeral 1 denotes a base member, and a frame 2 is erected on a rear portion of the base member 1, and a supply reel 3 is rotatably provided on the frame 2. Reference numeral 4 is an electronic component storage tape wound around the supply reel 3. As shown in the partially enlarged view of the figure, the electronic component storage tape 4 is a base tape 4a.
And a bottom tape 4b attached to the lower surface of the base tape 4a and a cover tape 4c attached to the upper surface of the base tape 4a. Pockets 4d are formed on the base tape 4a at a predetermined pitch, and chips P are stored in the pockets 4d.

At the front portion of the base member 1, an electronic component storage tape 4 wound around the supply reel 3 is provided.
A sprocket 5 is provided which pitches along the top. A large number of pin holes 20 are formed on the side surface of the sprocket 5 along the circumferential direction. Each pin hole 20
Are formed for each rotation angle of one pitch of the sprocket 5. A first drive lever 6 for rotating the sprocket 5 by a pitch is attached to the coaxial 5a of the sprocket 5, and a second drive lever 7 is connected to the drive lever 6 by a pin 9. Reference numeral 8 is a pin for rotatably attaching the second drive lever 7 to the side surface of the base member 1. On the upper surface of the base member 1, a peeling portion 21 that peels the cover tape 4c from the base tape 4a that is pitch-fed along the base member 1 is provided. A take-up reel 22 winds the cover tape 4c peeled by the peeling unit 21.

Reference numeral 10 denotes a bracket provided on the base member 1. The bracket 10 is provided with a pressing lever 11 whose lower end is brought into contact with and separated from the second drive lever 7 so as to be able to move up and down. Reference numeral 12 is a coil spring for urging the pressing lever 11 upward. Reference numeral 13 is a pusher for pushing the upper end of the push lever 11 to swing the drive lever 7 around the pin 8 in the arrow direction. When the pressing lever 11 is pressed by the pressing element 13, the pressing lever 11 presses the second drive lever 7 and the drive lever 7 swings, so that the first drive lever 6 also moves through the pin 9. Swinging in the arrow direction, the sprocket 5 rotates in the pitch direction in the arrow direction, and the tape 4 is fed in the same direction. Reference numeral 14 denotes a transfer head, which picks up the chip P in the pocket 4d by picking it up by the nozzle 15 at the pickup position Q, and transfers and mounts it on the substrate S.

Reference numeral 24 is a rocking lever having a pin 25 at its tip end that is releasably engaged with the pin hole 20, and is attached to the side surface of the base member 1 as shown in FIGS. The bearing 27 is pivotally mounted via a rotary shaft 26 so as to be swingable. Reference numeral 24a is a shaft hole. 24b is a swing lever 2
4 is a convex portion which is formed on the inner surface on the tip end side of the driving member 4 and is in sliding contact with the driver 29. Reference numeral 28 denotes a coil spring provided between the base member 1 and the base end portion of the swing lever 24, which applies a counterclockwise biasing force to the swing lever 24 in FIG. 20 is engaged.

Numeral 29 is a driver for swinging the swing lever 24 so as to engage and disengage the pin 25 with the pin hole 20 in conjunction with the pitch rotation of the sprocket 5, and the second drive lever 7
In an upright posture, and is in sliding contact with the convex portion 24b. As shown in FIG. 2, the upper end portion of the driver element 29 is a tapered taper portion 29a. In FIG. 1, when the driver element 29 rises to the position indicated by the chain line in the figure as the second drive lever 7 swings upward, the swing lever 24 moves the driver element 29.
Is pushed by the outer surface of the pin 25 and its tip swings about the rotary shaft 26 in the direction away from the base member 1 (clockwise in FIG. 3), and the pin 25 disengages from the pin hole 20 as shown by the chain line in FIG. To do. When the second drive lever 7 descends to the solid line position in FIG. 1, the driver 29 also descends to the solid line position in FIG. 1, and the tip end of the swing lever 24 swings clockwise by the spring force of the coil spring 28. Then, as shown by the solid line in FIG. 3, the pin 25 is fitted into the pin hole 20 and the rotation of the sprocket 5 is stopped.

This tape feeder has the above-mentioned structure, and its operation will be described below. As shown in FIG.
When the pressing lever 11 is pressed by 3, the drive levers 6 and 7 swing to rotate the sprocket 5 by a pitch in the direction of the solid line arrow, and the electronic component storage tape 4 wound around the supply reel 3 is pitch-fed. It At this time, the driver element 29 rises as the second drive lever 7 swings upward, and the pin 25 disengages from the pin hole 20 as shown by the chain line in FIG. Next, as the second driving lever 7 swings downward, the driver element 29 descends, so that the pin 25 is fitted into the pin hole 20 as shown by the solid line in FIG. 3, and the sprocket 5 rotates. Stop. In this way, by interlocking the pin 25 with the pin hole 20 in conjunction with the pitch rotation of the sprocket 5, the sprocket 5 rotates at a constant rotation angle, and therefore the tape 4 is pitch-fed at a constant pitch. P is accurately stopped at the pickup position Q and picked up by the nozzle 15 of the transfer head 14.

[0014]

As described above, according to the present invention, there is provided a swing lever having a pin hole formed on the side surface of the sprocket along the circumferential direction and having a pin which is removably engaged with the pin hole. In order to engage and disengage this pin with this pin hole in association with the pitch rotation of the sprocket, a driver element for oscillating the oscillating lever is provided in conjunction with the drive lever for driving the sprocket. As the pin engages and disengages from the pin hole, the sprocket rotates at a specified rotation angle, so the chip is properly stopped at the pickup position while feeding the tape at a constant pitch, and the transfer head nozzle secures the chip. You can pick it up.

[Brief description of drawings]

FIG. 1 is a side view of a tape feeder according to the present invention.

FIG. 2 is an exploded perspective view of essential parts of the tape feeder according to the present invention.

FIG. 3 is a plan view of a main part of the tape feeder according to the present invention.

FIG. 4 is a side view of a main part of a tape feeder according to a conventional means.

[Explanation of symbols]

 1 Base Member 3 Supply Reel 4 Electronic Component Storage Tape 5 Sprocket 6 Drive Lever 7 Drive Lever 20 Pin Hole 24 Swing Lever 25 Pin 29 Driver

Claims (1)

[Claims] 1. A supply reel provided at a rear portion of a base member, and an electronic component storage tape provided at a front portion of the base member and wound around the supply reel, are pitched along the base member. In a tape feeder including a sprocket to be fed and a drive lever for rotating the sprocket by a pitch, a pin hole is formed along a circumferential direction on a side surface of the sprocket, and the pin hole is detachably engaged with the pin hole. An oscillating lever having a pin is provided, and a driver element for oscillating the oscillating lever is interlockingly connected to the drive lever so that the pin is engaged with and disengaged from the pin hole in association with the pitch rotation of the sprocket. A tape feeder characterized by being installed.