JP2004111726A - Electronic component supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic component supply device, in which adverse effects on an electronic component due to inertial force operating on the electronic component can be eliminated, whose cost can be reduced and in which the electronic component can be positioned with precision. <P>SOLUTION: The electronic part supply device 20 supplies the electronic part 4 stored in a carrier tape 1. The device is provided with a tape driving means 34 for transporting the electronic part stored in the carrier tape to a part pickup position 28 and a magnet means 50, which is arranged near the part pickup position and positions the electronic component at a prescribed position by a magnetic force. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electronic component supply device, and more particularly, to an electronic component supply device that supplies an electronic component stored in a carrier tape.
[0002]
[Prior art]
An extremely large number of electronic components are mounted on a printed wiring board. At this time, an automatic electronic component mounting apparatus (automatic electronic component mounter) is used to transport and mount the electronic components on the printed wiring board. Is used.
With the increase in the speed of the electronic component automatic mounting device, the supply speed of the electronic component by the electronic component supply device has also been increased. The electronic component supply device sends the taped electronic component to a component pickup position where the electronic component automatic mounting device picks up the electronic component while peeling off the cover tape, and is called a tape feeder.
[0003]
[Problems to be solved by the invention]
Currently, the world's fastest electronic component automatic mounting device can pick up electronic components from a tape feeder with a tact time of 0.068 seconds and mount them on a printed wiring board. For this reason, it is necessary for the tape feeder to supply the electronic components with a tact time of 0.068 seconds so that the tape feeder can follow the high-speed operation of the electronic component automatic mounting apparatus.
[0004]
However, in a high-speed tape feeder, an inertia force acts on the electronic component due to a stop operation of the index wheel when the electronic component stored in the carrier tape is sent to the component pick-up position. May jump out of tape pocket. Therefore, in a high-speed tape feeder, a shutter mechanism is provided at a component pickup position so as to prevent electronic components from jumping out due to inertia force, and the shutter is covered with the shutter, and the shutter is opened only during component pickup. For this reason, a tape feeder without a shutter mechanism is not suitable for supplying electronic components at high speed. Also, the shutter mechanism is complicated, which causes an increase in cost.
[0005]
Further, even when the shutter mechanism is provided, the inertia force of the index wheel remains when the shutter is opened, and the remaining inertia force may cause electronic components to fly out, which is a problem. .
In addition, there is another problem that accurate positioning of the electronic component cannot be performed at the component pick-up position because the electronic component violates the inertial force in the pocket of the carrier tape.
[0006]
Therefore, the present invention has been made to solve the above-described conventional problems, and is applicable to an electronic component due to an inertial force acting on the electronic component regardless of whether a shutter mechanism is provided. It is an object of the present invention to provide an electronic component supply device capable of eliminating adverse effects.
Another object of the present invention is to provide an electronic component supply device that can reduce costs by supplying electronic components without providing a shutter mechanism.
Still another object of the present invention is to provide an electronic component supply device that can accurately position an electronic component at a component pickup position.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an electronic component supply device for supplying an electronic component stored in a carrier tape, and a tape driving unit that conveys the electronic component stored in the carrier tape to a component pickup position. And magnet means provided near the component pick-up position for positioning the electronic component at a predetermined position by magnetic force.
In the present invention configured as described above, the electronic component housed in the carrier tape is transported to the component pickup position by the tape driving unit, and the electronic component is moved to a predetermined position by the magnet unit provided near the component pickup position. Are positioned by magnetic force. As a result, the influence of the inertial force generated on the electronic component can be eliminated by the magnetic force of the magnet means, and a stable component pickup can be achieved.
[0008]
Further, the present invention preferably further includes magnet position adjusting means for adjusting the position of the magnet such that the distance between the carrier tape and the magnet means is a predetermined distance at the component pickup position.
With such a configuration, even if the size of the electronic component or the amount of the magnetic material contained in the electronic component changes, the magnitude of the magnetic force by the magnet means can be set to a desired value. The necessary optimum magnetic force condition can be created.
In the present invention, preferably, the magnet means positions the electronic component at a predetermined position in the pocket of the carrier tape.
[0009]
Further, in the present invention, preferably, the tape driving means has an index wheel whose outer peripheral portion is engaged with a feed hole of the carrier tape, and an internal drive source for rotating and driving the index wheel.
In the present invention, preferably, the internal driving source of the tape driving means is an electric motor or an air cylinder.
Further, in the present invention, preferably, the tape driving means includes an index wheel whose outer peripheral portion is engaged with a feed hole of the carrier tape, and a driving force means for rotating the index wheel by a driving force received from an external driving source. Have.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
First, a carrier tape used in the electronic component supply device of the present invention will be described with reference to FIG. FIG. 1A is a plan view of the carrier tape, and FIG. 1B is a sectional view. The carrier tape 1 includes a tape main body 2, a pocket 6 provided in the tape main body 2 for storing an electronic component 4, a cover tape 8 covering the pocket 6 in a state where the electronic component 4 is stored, and an index wheel 42 described later. And the sprocket hole 10 to be engaged with the index portion 42a.
[0011]
Next, a first embodiment of the electronic component supply device of the present invention will be described with reference to FIGS. As shown in FIG. 2, the electronic component supply device 20 includes a main body 22 and a tape reel holder 24 integrally provided on one end side of the main body 22. A tape reel 26 around which the carrier tape 1 containing the electronic components 4 is wound is attached to the tape reel holder 24.
A component pickup position 28 of the electronic component 4 is set on the main body 22. The carrier tape 1 is fed in the direction of arrow 30 toward the component pickup position 28.
On the upstream side of the component pickup position 28 of the main body 22 (upper part on one end side of the main body 22), a cover tape collecting device 32 for collecting the cover tape 8 peeled off before the component pickup position 28 is attached. I have.
[0012]
The electronic component supply device 20 includes a carrier tape driving device 34 for sending the electronic components 4 stored in the carrier tape 1 to the component pickup position 28.
At the component pick-up position 28, the carrier tape 1 from which the electronic component 4 has been picked up and taken out becomes a scrap tape 36. Therefore, a scrap tape guide 38 for discharging the scrap tape 36 to the outside is provided. Have been.
Further, a shutter mechanism 29 is provided at the component pick-up position 28. The shutter mechanism 29 can be opened and closed by an opening / closing device (not shown). And the electronic component 4 can be picked up by opening the shutter. The shutter mechanism 29 is not essential in the present embodiment, and is provided as necessary.
[0013]
As shown in FIG. 3, the carrier tape driving device 34 of the electronic component supply device 20 includes a servo motor (electric motor) 40 as a driving source, an index wheel 42 for feeding the carrier tape 1, and a servo motor 40. And intermediate gears 43 to 48 for transmitting the driving force to the index wheel 42.
The index wheel 42 has an index portion 42a on the outer periphery, and the index portion 42a is inserted into or engaged with the sprocket hole 10 of the carrier tape 1, and the index wheel 42 rotates, The electronic component 4 stored in the pocket 6 of the carrier tape 1 is sent to the component pickup position 28.
[0014]
As shown in FIG. 4, a magnet 50 is provided below the electronic component 4 at the component pickup position 28 at a predetermined distance from the electronic component 4, and the center position of the magnet 50 is the same as the component pickup position 28. I do. The magnet 50 is fixedly arranged at the upper center of a magnet holder 52 serving as a magnet position adjusting member, and the magnet holder 52 is attached to the main body 22 via a mounting plate 55 with screws 54. The distance between the electronic component 4 and the magnet 50 can be changed to a desired value by adjusting the vertical position of the magnet holder 52.
Here, the distance between the electronic component 4 and the magnet 50 depends on the size of the electronic component 4 and the change in the content of the magnetic material contained in the electrodes of the electronic component 4. Since the sizes are different, the distance is set such that an optimum magnetic force condition can be created for each electronic component.
[0015]
As shown in FIG. 4, above the component pickup position 28, an electronic component pickup nozzle 56 of an electronic component automatic mounting device (not shown) is on standby, and this electronic component pickup nozzle 56 is set at a predetermined timing. The electronic component 4 housed in the pocket 6 of the carrier tape 1 is picked up by the vacuum suction force by moving up and down.
[0016]
Next, as shown in FIG. 5, when the electronic component 4 stored in the carrier tape 1 is sent to the component pickup position 28 by the index wheel 42, the electronic component 4 The movement in the pocket 6 is restricted by moving toward and contacting the front surface 6a of the pocket 6, so that the center of the electronic component 4 is accurately aligned with the center position of the magnet 50 and the component pickup position. Positioned. The electronic component 4 is picked up by the electronic component pickup nozzle 56 at this position. In addition to this position, the electronic component 4 may be positioned, for example, at a position in contact with the rear surface of the pocket 6 or at the center position of the pocket 6 so as to coincide with the center position of the magnet 50 and the component pickup position. .
[0017]
Next, the operation of the above-described first embodiment of the present invention will be described. First, when the servomotor 40 of the carrier tape driving device 34 operates, the driving force generated by the servomotor 40 drives the index wheel 42 to rotate via the intermediate gears 43 to 48. Is sent out from the tape reel 26 to the component pickup position 28 in the direction indicated by the arrow 30. At this time, the cover tape 8 is peeled off before the component pickup position 28, and the peeled cover tape 8 is collected by the cover tape collecting device 32.
[0018]
When the electronic component 4 to be picked up reaches the component pick-up position 28, the operation of the carrier tape driving device 34, that is, the rotation of the index wheel 42 is stopped, and the electronic component 4 is moved to a predetermined position by the magnetic force of the magnet 50. Is positioned with high accuracy.
In the present embodiment, the inertia force acts on the electronic component 4 when the rotation of the index wheel 42 stops, but the magnitude of the magnetic force of the magnet 50 is set to a value that overcomes the inertial force. The electronic component 4 can be reliably and accurately positioned at a predetermined position without violating the inside of the pocket 6 due to inertial force.
[0019]
At the component pick-up position 28, the shutter of the shutter mechanism 29 is opened, the electronic component pick-up nozzle 56 descends, and picks up the electronic component 4 by the vacuum suction force. Thereafter, the servomotor 40 of the carrier tape driving device 34 operates again, and the same operation is repeated.
The carrier tape 1 from which the electronic component 4 has been picked up becomes a scrap tape 36, and is discharged to the outside through the scrap tape guide 36.
[0020]
According to the above-described first embodiment, at the component pickup position 28, the magnetic force of the magnet 50 can overcome the inertial force acting on the electronic component 4 and position the electronic component 4 at a predetermined position. Therefore, the shutter mechanism that has been required conventionally can be omitted, and the cost can be reduced.
Further, even in an electronic component supply device having a shutter mechanism, when the shutter of the shutter mechanism 29 is opened, the electronic component 4 may fly out due to the residual inertial force, but the magnetic force of the magnet 50 acts on the electronic component 4. In addition, jumping out of the electronic component can be prevented.
Furthermore, since the electronic component 4 is positioned by the magnetic force of the magnet 50, the electronic component can be accurately positioned at a desired position.
[0021]
Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the second embodiment, an air cylinder 58 is used as a drive source of the index wheel 42 instead of the servomotor 40 of the first embodiment. A rack 60 is connected to the air cylinder 58, and the intermediate gear 45 rotates via the rack 60 by the piston movement of the air cylinder 58. A one-way clutch 62 is attached to the intermediate gear 45 so that it can rotate only in one direction. The intermediate gears 45 to 48 are arranged so that the index wheel 42 is moved by one pitch by one reciprocating piston movement of the air cylinder 58.
[0022]
Generally speaking, when an air cylinder is used, the index wheel is smoothly stopped like a servomotor, the inertial force acting on the electronic components is suppressed, and the electronic components are supplied stably. Although it is difficult, in the second embodiment, the electronic component 4 can be accurately positioned at a predetermined position by the magnetic force of the magnet 50.
Therefore, in the second embodiment, a relatively inexpensive air cylinder 58 can be used, and even if a drive source such as the air cylinder 58 that cannot stop the index wheel 42 smoothly is used, the magnet is Since the electronic component can be accurately positioned at a predetermined position by the magnetic force of 50, a stable component pickup can be achieved.
[0023]
Next, a third embodiment of the present invention will be described with reference to FIG. Also in the third embodiment, the same portions as those in the first embodiment and the second embodiment are denoted by the same reference numerals, and description thereof will be omitted.
In the third embodiment, a pusher 64 of an automatic electronic component mounting apparatus (not shown) is used as a drive source of the index wheel 42 instead of the servomotor 40 of the first embodiment. The pusher 64 moves up and down in synchronization with the electronic component pickup nozzle 56 to transmit a driving force to the lever 66. When the lever 66 is depressed, the rack 60 moves rightward in the drawing, and the index wheel 42 rotates. Here, the intermediate gears 45 to 48 are arranged so that when the lever 66 moves up and down once, the index wheel 42 is fed by one pitch.
[0024]
In the third embodiment, the one-way clutch 62 is attached to the intermediate gear 45. Instead, the index wheel 42 is provided with a notch feed mechanism that moves only in one direction, and the index wheel 42 rotates only in one direction. It may not be done.
In the third embodiment, since the electronic component supply device does not include a drive source, the cost of the device can be further reduced. In addition, since the electronic component 4 can be accurately positioned at a predetermined position by the magnet 50, stable component pickup can be performed even when the electronic component is fed at a high speed.
[0025]
【The invention's effect】
As described above, according to the electronic component supply device of the present invention, regardless of whether a shutter mechanism is provided or not, it is possible to eliminate the adverse effect on the electronic component due to the inertial force acting on the electronic component. . Further, by supplying the electronic components without providing the shutter mechanism, the cost can be reduced. Further, the electronic component can be accurately positioned at the component pickup position.
[Brief description of the drawings]
FIG. 1 is a diagram showing a carrier tape 7 used in an electronic component supply device of the present invention.
FIG. 2 is a front view showing a first embodiment of the electronic component supply device of the present invention.
FIG. 3 is an enlarged partial view showing the carrier tape driving device of FIG. 2;
FIG. 4 is a partially enlarged view showing the vicinity of a component pickup position in FIG. 3;
FIG. 5 is a partially enlarged view showing positioning of the electronic component according to the first embodiment.
FIG. 6 is a partial front view showing a second embodiment of the electronic component supply device of the present invention.
FIG. 7 is a partial front view showing a third embodiment of the electronic component supply device of the present invention.
[Explanation of symbols]
1 Carrier Tape 6 Pocket 10 Sprocket Hole 20 Electronic Component Supply Device 22 Main Body 28 Component Pickup Position 29 Shutter Mechanism 34 Carrier Tape Drive Device 40 Servo Motor 42 Index Wheels 43-48 Intermediate Gear 50 Magnet 52 Magnet Holder 58 Air Cylinder 60 Rack 62 One Way Clutch 64 Pusher 66 Lever

Claims (7)

An electronic component supply device that supplies an electronic component stored in a carrier tape,
Tape driving means for transporting electronic components housed in a carrier tape to a component pickup position,
Magnet means provided near the component pick-up position for positioning the electronic component at a predetermined position by magnetic force;
An electronic component supply device comprising: 2. The electronic component supply device according to claim 1, further comprising: magnet position adjusting means for adjusting a position of the magnet so that a distance between the carrier tape and the magnet means is a predetermined distance at the component pickup position. . 3. The electronic component supply device according to claim 1, wherein the magnet means positions the electronic component at a predetermined position in the pocket of the carrier tape. 4. The electronic device according to claim 1, wherein the tape driving unit includes an index wheel whose outer peripheral portion is engaged with a feed hole of the carrier tape, and an internal drive source that rotationally drives the index wheel. 5. Parts supply device. 5. The electronic component supply device according to claim 4, wherein the internal drive source of the tape drive unit is an electric motor or an air cylinder. 4. The tape driving device according to claim 1, wherein the tape driving device includes an index wheel whose outer peripheral portion is engaged with a feed hole of the carrier tape, and a driving force device that rotates the index wheel by a driving force received from an external driving source. The electronic component supply device according to claim 1. The electronic component supply according to any one of claims 1 to 6, further comprising a shutter mechanism provided at the component pickup position to prevent the electronic component from jumping out by closing and allowing the electronic component to be taken out by opening. apparatus.

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