JP2000114778A - Tape feeder and feeding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tape feeder and feeding method in which discarding process of cover tape can be facilitated. SOLUTION: The tape feeder 8 for pitch feeding a tape 10 holding an electronic part to the pickup position of an electronic part mounter comprises feed rollers 39, 40 for feeding a cover tape 10b pasted onto the upper surface of a tape 10 while covering an electronic part reversely to the feeding direction, a tension roller 30 for detecting tension of the cover tape 10b and a photosensor 34, a section 44 for controlling operation of the feed rollers 39, 40 based on the detection results of tension, and a container 41 for containing the received cover tape 10b. According to the arrangement, the cover tape 10b is contained while being folded up and can be discarded easily.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder and a tape feeding method for feeding an electronic component held on a tape at a pitch and supplying the electronic component to a pickup position of an electronic component mounting apparatus.

[0002]

2. Description of the Related Art In an electronic component mounting apparatus, a method using a tape feeder is known as a method of supplying an electronic component to a pickup position of a nozzle of a transfer head.
In this method, a tape holding an electronic component is pulled out from a supply reel, and is fed to a nozzle by pitch-feeding in synchronization with mounting timing of the electronic component. A cover tape is adhered to the upper surface of the tape to protect the electronic components and prevent the electronic components from falling off. The cover tape is peeled off from the upper surface of the tape before being sent to the pickup position, and is taken up by a collection roller.

[0003]

When the wound-up cover tape reaches a predetermined winding amount, it is removed from the collecting roller and discarded. However, it is not easy to remove the multiply wound cover tape from the collection roller.Conventionally, remove the cover tape while unwinding it in order from the end, or cut the wound cover tape using a knife or the like. And the like, and there is a problem that it takes time to process the wound cover tape.

Accordingly, an object of the present invention is to provide a tape feeder and a tape feeding method capable of easily disposing of a cover tape.

[0005]

According to a first aspect of the present invention, there is provided a tape feeder for feeding an electronic component to a pickup position of an electronic component mounting apparatus by feeding a tape holding the electronic component at a pitch. A cover tape feeding means for feeding a cover tape attached to the upper surface of the tape so as to cover the electronic component in a direction opposite to the feeding direction, and a tension detecting means for detecting a tension of the tape on an upstream side of the cover tape feeding means. A control unit for controlling the cover tape feeding means based on the tension detection result; and a container for storing the cover tape fed by the cover tape feeding means.

A tape feeder according to a second aspect is the tape feeder according to the first aspect, wherein the container is a box-shaped container provided inside a tape feeder body and having a narrow entrance portion and a wide interior. .

A tape feeder according to a third aspect is the tape feeder according to the first aspect, wherein the cover tape feeding means is a feed roller that feeds the cover tape by sandwiching the cover tape between a pair of rollers. Grooves provided on the outer periphery of these feed rollers, and a rake member whose leading end fits into these grooves form winding prevention means for preventing the cover tape from winding around the feed rollers.

According to a fourth aspect of the present invention, there is provided a tape feeding method for feeding an electronic component to a pickup position of an electronic component mounting apparatus by feeding a tape holding an electronic component at a pitch. A cover tape attached over the electronic component is fed by a cover tape feeding means in a direction opposite to the tape feeding direction, and a tension detection result of the cover tape detected by a tension detecting means on the upstream side of the cover tape feeding means is provided. By controlling the cover tape feeding means on the basis of this, the fed cover tape is accommodated in the container.

According to the invention described in each claim, the cover tape feeding means for feeding the cover tape after being peeled from the tape is controlled and sent out based on the detection result of the tension of the cover tape, and is accommodated in the container. The cover tape can be easily disposed of.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 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 perspective view of the tape feeder, FIG. 3 is a mechanism diagram showing the configuration of the tape feeder, and FIG. FIG. 3 is a side view of a feed roller of the tape feeder.

First, an electronic component mounting apparatus will be described with reference to FIG. In FIG. 1, an electronic component mounting apparatus 1 includes:
It has two mounting stages 2A and 2B. A substrate loading port 3 provided on the side surface is provided on the mounting stage 2A on the upstream side.
The substrate 4 is carried in. Electronic components picked up from the electronic component supply units 5A and 5B are mounted on the substrate 4 positioned on a transport path (not shown).

A plurality of tape feeders 8 are mounted on the electronic component supply units 5A and 5B. The tape feeder 8
A number of units are arranged in parallel on a feeder base (see feeder base 6A shown in electronic component supply unit 5A), and electronic components in a taping state (not shown) from supply reels 9 mounted on carts 7A and 7B. Pull out the pitch feed. Thereby, the electronic components are mounted on each of the mounting stages 2A, 2A,
The electronic component B is supplied to the pickup position.

Next, the structure of the tape feeder 8 will be described with reference to FIGS. As shown in FIG. 2, the tape feeder 8 is configured by arranging the following elements on the side surface of an elongated base plate 8a. 2 and 3, a sprocket 11 is disposed at a front end portion (a front side in FIG. 2) of the tape feeder 8. The teeth of the sprocket 11 mesh with tape feed holes provided at a constant pitch on the tape 10 (see FIG. 3), and the sprocket 11 rotates the pitch to feed the tape 10 by pitch. A pulley 12 is coaxially connected to the sprocket 11, and a pulley 14 and a pulley 12 coaxially connected to the worm wheel 13 are tuned with a belt 15.

A worm 18 meshes with the worm wheel 13, and the worm 18 is driven to rotate by a motor 16. The motor 16 includes an encoder 17, and the encoder 17 outputs a pulse signal as rotation position data of the motor 16. A rotation dog 19 is mounted on the rotation shaft of the worm 18. The rotation position of the worm 18 can be detected by detecting a slit provided in the dog 19 with the photosensor 20.
When the motor 16 is driven, the sprocket 11 rotates,
The tape 10 engaged with the sprocket 11 is fed in the direction of the arrow shown in FIG.

The upstream side of the sprocket 11 is a pickup position for electronic components. The tape 10 pulled out from the reel 9 and fed at a pitch is separated by a guide member 21 from a cover tape 10b attached to the upper surface of a main tape 10a constituting the tape 10 so as to cover the electronic components just before the pickup position. The upper surface of the main tape 10a is exposed. By lowering the suction nozzle 22 with respect to the main tape 10a in this state, the taped electronic component is picked up.

The cover tape 10b peeled off from the upper surface of the tape 10 is folded in the direction opposite to the direction in which the tape 10 is fed. A tension roller 30 is provided in the middle of the return path of the cover tape 10b. The tension roller 30 is a lever 3 rotatable around a fulcrum 31a.
The lever 31 is provided at one end of the spring 3.
2 urges the tension roller 30 in a direction for moving the tension roller 30 upward. Therefore, the tension roller 3
A tension is applied to the cover tape 10b extended in contact with 0. That is, the spring 32 serves as tension applying means.

A solenoid 33 is provided beside the lever 31.
The lever 31 is displaced in the direction of the arrow by driving the solenoid 33. Therefore, the tension roller 30 is displaced in a direction away from the cover tape 10b, whereby the tension application of the cover tape 10b is released. That is, the solenoid 33 is a tension release unit. The displacement of the lever 31 is detected when the dog 35 shields the photo sensor 34 from light.

Behind the tension roller 30, feed rollers 39 and 40 for the cover tape 10b are provided.
The feed roller 39 is a drive roller, and the bevel gears 37, 3
8 and is rotationally driven by a motor 36. Therefore, by driving the motor 36, the feed roller 3
9 and 40 rotate, and the cover tape 10b sandwiched between these two rollers is sent backward.

The cover tape 1 by the photo sensor 34
0b at the timing when the looseness of the tension 0b is detected.
By driving the cover tape 10b, the loose cover tape 10b is sent rearward, and the sent cover tape 10b is sent into the container 41 arranged rearward and accommodated therein. Container 4
Reference numeral 1 denotes a box-shaped container provided on the main body of the tape feeder 8 and having a narrow entrance and a wide interior. By forming the container 41 in such a shape, the cover tape 10b can be satisfactorily accommodated without causing jamming.

Next, the control system will be described. In FIG. 3, the motor 16 and the motor 36 are driven by a motor driving unit 43. The solenoid 33 is a solenoid driving unit 4
2 driven. The motor drive unit 43 and the solenoid drive unit 42 are controlled by the control unit 44. The detection signals of the photo sensor 20 and the photo sensor 34 are
Is transmitted to The rotational position of the motor 16 is detected as a pulse signal by the encoder 17, and the pulse signal is transmitted to the control unit 44. By controlling the rotation of the motor 16 by the control unit 44, the sprocket 11
The start / stop of the rotation operation, the speed, and the rotation amount per feed operation can be arbitrarily set. That is, the feed timing, feed speed, and feed amount of the tape 10 can be changed as needed.

The slit position of the dog 19 is determined by the photo sensor 2
By detecting with 0, the approximate rotational position of the worm 18 can be detected, and by combining this detection result with the pulse signal of the encoder 17, the rotational position of the worm 18, that is, the rotational position of the sprocket 11, can be detected. can do. That is, the dog 19, the photo sensor 20, and the encoder 17 constitute a rotational position detecting means.

This tape feeder is configured as described above, and the operation will be described below. In FIG. 1, the tape feeder 8 is used in a state of being mounted on a feeder base as shown in an electronic component supply section 5B. During the mounting operation, the tape 10 pulled out from the supply reel 9 is moved to the main tape 10 by the guide member 21 just before the pickup position.
a and the cover tape 10b. Cover tape 1
0b is fed backward by the winding rollers 39 and 40. The operation at this time will be described.

In FIG. 3, when the main tape 10a is pitch-fed by the sprocket 11, the cover tape 10b is loosened by a corresponding decrease in tension. Then, the tension roller 30 is attached to the cover tape 1.
When 0b is loosened, it is displaced upward by the urging force of the spring 32. As a result, the dog 35 at the lower end of the lever 31
Is displaced leftward, and the photo sensor 34 detects this displacement, thereby detecting a decrease in the tension of the cover tape 10b. Then, based on the tension detection result, the motor 36
Is driven, and the feed roller 49 is rotated to feed the cover tape 10b into the rear container 41. By continuing this operation, the cover tape 10b is collected in the container 41 in a folded state. Then, when a predetermined amount of the cover tape 10b is stored in the container 41, the cover tape 10b is taken out and discarded. At this time, it is not necessary to unwind and remove the cover tape 10b from the recovery reel as in the conventional processing method, so that the time required for disposal processing can be reduced.

The feed rollers 39, 40 are provided with grooves 39a, 40a, as shown in FIG. 4, and the leading end of the rake member 45 is fitted in each of the grooves 39a, 40a. By providing such grooves 39a, 40a and the rake member 45, the take-up rollers 39, 4
0 can prevent the cover tape 10b from being wound around the winding rollers 39 and 40 when the cover tape 10b is fed. That is, the grooves 39a and 40a and the rake member 45 serve as winding prevention means.

As described above, the cover tape 10b
As a method of collecting and discarding, instead of using a conventional collecting reel, the cover tape is fed into the container in a folded state, thereby greatly improving the workability at the time of disposal processing performed at predetermined intervals. Can be.

[0026]

According to the present invention, the cover tape feeding means for feeding the cover tape after being peeled off from the tape is controlled and sent out based on the detection result of the cover tape tension, and is accommodated in the container. This eliminates the need to remove the cover tape wound on the conventional collection reel,
The cover tape can be easily disposed of with good workability.

[Brief description of the drawings]

FIG. 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 perspective view of a tape feeder according to an embodiment of the present invention.

FIG. 3 is a mechanism diagram showing a configuration of a tape feeder according to an embodiment of the present invention.

FIG. 4 is a side view of a feed roller of the tape feeder according to the embodiment of the present invention.

[Explanation of symbols]

 5A, 5B Electronic component supply unit 6A Feeder base 8 Tape feeder 9 Supply reel 10 Tape 10b Cover tape 30 Tension roller 32 Spring 34 Photo sensor 39, 40 Feed roller 41 Container 44 Control unit 45 Rake member

Claims (4)

[Claims] 1. A tape feeder for feeding an electronic component to a pickup position of an electronic component mounting apparatus by feeding a tape holding an electronic component at a pitch, wherein the tape feeder is attached to an upper surface of the tape so as to cover the electronic component. Cover tape feeding means for feeding the cover tape in a direction opposite to the feeding direction,
Tension detecting means for detecting the tension of the tape on the upstream side of the cover tape feeding means, a control unit for controlling the cover tape feeding means based on the detected tension, and a cover fed by the cover tape feeding means. A tape feeder comprising: a container for accommodating a tape. 2. The tape feeder according to claim 1, wherein the container is a box-shaped container provided inside a tape feeder main body and having a narrow entrance and a wide interior. 3. The cover tape feeding means is a feed roller which feeds the cover tape by sandwiching the cover tape between a pair of rollers. A groove provided on the outer periphery of these feed rollers, and a groove inside these grooves are provided. 2. The tape feeder according to claim 1, wherein a rake member having a leading end fitted into the tape feeder serves as a winding prevention means for preventing winding of the cover tape around the feed roller. 4. A tape feeding method for feeding an electronic component to a pickup position of an electronic component mounting apparatus by feeding a tape holding an electronic component at a pitch, wherein the electronic component is attached to an upper surface of the tape so as to cover the electronic component. The cover tape is fed by the cover tape feeding means in the direction opposite to the tape feeding direction, and the cover tape feeding means is moved upstream based on the tension detection result of the cover tape detected by the tension detecting means on the upstream side of the cover tape feeding means. A tape feeding method, wherein the fed cover tape is housed in a container by controlling.