JPH04165699A - Tape feeder - Google Patents

Abstract

PURPOSE:To make it possible to perform always a winding of a constant amount by a method wherein a pin disposed in upright on the tip of a lever is fitted movably in a long hole provided in the coupling rod of a reeling reel driving mechanism and the movement of the lever is always made to follow the movement of a push rod. CONSTITUTION:When a push rod 26 is pressed, a feeding-out mechanism 22 feeds out a tape adhered with an electronic component by the amount of one piece. When the rod 26 is pressed, a lever 27 is also pressed simultaneously to a direction B, a reeling reel 23 is rotated via a reeling reel driving mechanism 24 and a covered film is peeled off by the amount of one piece. The covered film winding diameter of the reel 23 is changed in order, but as a coupling rod 28 and a lever 30 are coupled with each other via a long hole 28a, a change in the winding diameter is adsorbed according to the amount of a change in this long hole 28a. Thereby, even if the covered film winding diameter of the reel 23 is changed, a winding of a constant amount can be always performed because the winding angle of the lever 27 is changed by the long hole 28a provided in the coupling rod 28.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tape feeder used in a chip mounter for mounting chip-type electronic components on a printed circuit board or the like.

(Prior art and its problems) In general, a tape feeder feeds electronic components one by one from a component supply reel to which electronic components are attached, and while peeling off the film covering the top surface of the electronic components, the tape feeder uses a nozzle to adsorb the electronic components. Components are mounted on a circuit board.

However, if this coating film is not peeled off accurately enough to match the amount of feed per batch, it may become impossible to supply electronic components or electronic components may stick to the coating tape and fall out. .

Therefore, various efforts have been made to reliably peel off this covering tape.

For example, as shown in FIG. 3, it is composed of a tape feeding mechanism 2 driven by a roller 1a at the tip of a push rod 1, a winding drum 3 for winding a covering tape covering electronic components, and the like. . Here, the winding drum 3 is supported by a support shaft 5 via a one-way clutch 4. Further, the rotation of the winding drum 3 in only one direction is restricted by the ratchet pawl 7 and the gear 7b which are biased by the spring 6.

The support shaft 5 is semi-rotatably supported by a part of the main body of the tape feeder, and is fixed to the arm 8. The tip of the arm 8 and the lever 9 are connected by a connecting rod 10,
The winding drum 3 is urged by a spring 11 in the direction of winding the film.

However, in a tape feeder having such a configuration, the length of the peeled covered tape to be wound changes at the start and end of the winding drum 3, so the winding amount has to be constant. There was a drawback. For this reason, the lever 9 may not follow the tip roller 1a of the push rod 1 and return.

Furthermore, pushing the push rod 1 requires a very large thrust, and if the push rod 1 cannot be pushed all the way, the ratchet pawl cannot be locked in a predetermined position and the tape cannot be fed by the specified amount. Additionally, when sucking up electronic parts, the lack of a tape holder causes the tape to float up, causing suction errors. Furthermore, there was a drawback that the ratchet pawl 7 was noisy in its operation.

Further, as a solution to these drawbacks, a tape feeder as shown in FIG. 4 has been proposed. In the figure, the tape feeder includes a winding drum 3 rotatably supported by a shaft 12 on a part of the tape feeder body, a lever 9 pressed by a push rod (not shown), and a connecting rod 10 connected by a pin. a drive piece 13 driven by a drive piece 13;
It consists of a biasing piece 15 connected with a spring 14, a gear 16 rotatably supported on the shaft 12 by a one-way clutch, and a small gear 17 rotatably supported on the biasing piece 15. 14 always urges the winding drum 3 in the direction of winding up the coated tape. Although this configuration can solve the problem of variations in the winding amount of the coated tape due to changes in the winding diameter of the winding drum 3, the mechanism becomes complicated and the width is thick, making it difficult to use for future thin type tapes. Unable to respond to feeders.

Furthermore, since the number of parts is large, the failure rate is high.

Furthermore, the mechanism of the winding section becomes complicated, and the number of component parts becomes extremely large, causing an increase in cost.

(Means for Solving the Problems) A tape feeder according to the present invention includes a tape feeder body that rotatably supports a component supply reel wound with taping components, and a tape feeder body that rotatably supports a component supply reel wound with taping components, and a tape feeder that intermittently feeds taping components from the component supply reel. A tape feeder equipped with a feeding mechanism that feeds out tape parts one by one, a tape take-up reel that winds a taped component covering tape immediately before the feeding mechanism, and a take-up reel drive mechanism that rotates the tape take-up reel intermittently. , providing a long connecting rod of the take-up reel drive mechanism;
A pin provided upright at the tip of the lever is loosely fitted into this elongated hole, so that the movement of the lever always follows the movement of the push rod.

(Function) As described above, the tape feeder according to the present invention includes a tape feeder main body that rotatably supports a component supply reel wound with taped components, and a tape feeder that intermittently receives taped components one by one from the component supply reel. A tape feeder equipped with a feeding mechanism that feeds out a tape, a tape take-up reel that winds up a tape covering tape immediately before the feeding mechanism, and a take-up reel drive mechanism that rotates the tape take-up reel intermittently. A long hole is provided in the connecting rod of the take-up reel drive mechanism, and this long relief allows the lever to always follow the movement of the push rod, so one piece of covering tape is always peeled off, preventing suction errors. can.

In addition, since the tape presser is placed at the position where the electronic parts are to be picked up, it is possible to prevent the tape from floating up during suction, thereby preventing suction errors.

(Example) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a main part of a tape feeder which is an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a main part of a tape feeder which is an embodiment of the present invention, and FIG. 3 is a conventional embodiment. FIG. 4 is an enlarged perspective view of a main part of a tape feeder showing a conventional embodiment.

In the figure, the tape feeder includes a tape feeder main body 21 that rotatably supports a component supply reel 20 on which taped components are wound, and a feeding mechanism 22 that intermittently feeds out taped components one by one from the component supply reel 20.
It is comprised of a tape take-up reel 23 that winds up the taping component covering tape immediately before the feeding mechanism 22, a take-up reel drive mechanism 24 that rotates the tape take-up reel 23 intermittently, and the like.

The tape feeder main body 21 has positioning bins 25 a, 25 b 125 c erected on the lower surface in order to accurately supply components to the component suction nozzle position of the chip mounter.

The component supply reel 20 is rotatably supported at the end of the tape feeder main body 21 and supplies the wound taping component according to the operation of the feeding mechanism 22.

The feeding mechanism 22 feeds out the electronic components one part at a time using a push rod 26, a ratchet mechanism, a sprocket, etc. that are pressed from the outside. The electronic components sent out are
In the working position of the suction head (not shown), the covering tape must be partially peeled off. The electronic component covering tape is then peeled off by the take-up reel 23.

Further, a tape presser 33 is provided at the component takeout position of the feeding mechanism 22 to prevent the covering tape from lifting up.

The take-up reel 23 is supported on the tape feeder main body 21 so as to rotate only in the direction of arrow A via the shaft 31 along with a reverse rotation prevention mechanism consisting of a reverse rotation prevention gear 34 and a fixed shaft 35 as shown in FIG. .

Further, the take-up reel 23 is rotationally driven by a predetermined amount by a take-up reel drive mechanism 24.

The take-up reel drive mechanism 24 includes the push rod 2 described above.
6, a connecting rod 28 that is coupled to the lever 27, a spring 29 that urges the connecting rod 28 downward, and a lever 30 that is loosely fitted into the long 28a of the connecting rod 28. and a take-up reel 23 supported by a shaft 31 fixed to the lever 30 via a one-way clutch.
, a reversal prevention gear 34 that prevents the take-up reel 23 from reversing, a fixed shaft 35 , one end of which is locked to the tip of the lever 30 , and the other end of which is locked to a part of the connecting rod 28 .
It is composed of a spring 32 and the like that urges the bottle 30a, which is erected at the tip of the slotted hole 28, toward the lower end of the elongated hole 28.

Next, the operation of the tape feeder configured as above will be explained. First, when the push rod 26 is pressed by a member not shown, the feeding mechanism 22 feeds out one piece of tape to which an electronic component (not shown) is attached.

Furthermore, when the push rod 26 is pressed, the lever 27 is simultaneously pressed in the direction B in FIG. .

The winding diameter of the coating film on the take-up reel 23 changes sequentially, but since the connecting rod 28 and the lever 30 are connected via the elongated hole 28a, the change in the winding diameter is controlled by the amount of change in the elongated hole 28a. Absorb.

That is, when the winding diameter is small, the lever 30 needs to be rotated by a large angle, but in this case, the lever 30 is pushed up by the lower end of the elongated hole 28a and rotated.

At this time, the take-up reel 2
3 does not rotate. Next, the connecting rod 28 is pulled downward by the restoring force of the spring 29.

Since the lever 30 is biased by the spring 32 at the lower end of the elongated hole 28a, the take-up reel 23 rotates by the maximum amount.

On the other hand, when the winding diameter of the take-up reel 23 is large, the tip of the lever 3o is not restrained by the length of the lever 28a.
The spring 32 performs the necessary rotation through a small angle.

In this way, the tip pin of the lever 30 moves within the elongated portion 28a to adjust the amount of peeling.

Note that the present invention is not limited to the above embodiments, and various design changes can be made based on the technical idea of the present invention.

(Effects of the Invention) As explained in detail above, the tape feeder according to the present invention can change the take-up angle of the lever by changing the length of the connecting rod even if the winding diameter of the coating film on the take-up reel changes. Therefore, a constant amount of winding can be performed at all times.

Furthermore, since the tip of the lever follows the push rod regardless of the rotation angle of the take-up reel, stable winding of the coated film is always possible.

Furthermore, since there is little variation in the force pressing the push rod and the ratchet mechanism is eliminated, noise can be prevented from occurring.

Furthermore, since the width of the tape feeder can be narrowed, a large number of thin type tape feeders can be mounted, and space can be used effectively.

Furthermore, since the number of parts is small, there are fewer occurrences of failures.

[Brief explanation of drawings]

FIG. 1 is a front view of a main part of a tape feeder which is an embodiment of the present invention, FIG. 2 is an enlarged perspective view of a main part of a tape feeder which is an embodiment of the present invention, and FIG. 3 is a conventional embodiment. FIG. 4 is an enlarged perspective view of a main part of a tape feeder showing a conventional example. 1...Push rod, la...
Tip roller 2...Front feeding mechanism, 3...
... Winding drum, 4 ... One-way clutch, 5 ... Support shaft, 6 ... Support shaft,
7...Ratchet pawl, 8...
・Arm, 9...Lever, 10
...Connection rod, 11...Spring, 20...Parts supply reel, 21...Tape feeder body, 22...
・Feeding mechanism, 23...take-up reel,
24... Take-up reel drive mechanism, 25 a,
25 b, 25 c...positioning bin,
26...Push rod, 27. 30...
... Lever, 28.32 ... Spring, 30 a
... Bin, 31 ... Axis,
33...Tape holder, 34...Reverse rotation prevention gear, 35...Fixed shaft. droplets

Claims (1)

[Claims] A tape feeder main body rotatably supports a component supply reel wound with taping components, a feeding mechanism that intermittently feeds out taping components one by one from the component supply reel, and a taping component covering tape immediately before the feeding mechanism. In a tape feeder equipped with a tape take-up reel that winds up a tape take-up reel and a take-up reel drive mechanism that rotates the tape take-up reel intermittently, an elongated hole is provided in a connecting rod of the take-up reel drive mechanism; A tape feeder characterized in that a pin standing upright at the tip of a lever is loosely fitted into an elongated hole so that the movement of the lever always follows the movement of the push rod.