JP2936852B2 - Tape feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape feeder,
Specifically, the number of remaining electronic components in the electronic component storage tape wound on the supply reel is detected, and the out-of-stock of the electronic components is detected before the end of the tape.

[0002]

2. Description of the Related Art In an electronic component mounting apparatus, a tape feeder is frequently used as a means for supplying an electronic component to a transfer head for transferring and mounting the electronic component on a substrate. The tape feeder is provided with a supply reel on which an electronic component storage tape is wound, and supplies the electronic component to the transfer head while feeding the tape out of the supply reel and feeding the tape at a pitch.

When the electronic components of the tape are out of stock, the tape feeder must be replaced. Conventionally, as a means for detecting out-of-stock electronic components,
When the transfer head makes a continuous pick-up error multiple times, a message is displayed on the monitor TV to notify the operator, or the number of electronic components stored in the tape is input to the computer in advance. Means are known in which the number of electronic components picked up by the transfer head is subtracted, and when the remaining number decreases, a screen display is displayed on a monitor television to that effect.

[0004]

However, the former is,
It is not clear whether the pick-up error is due to a shortage of the product or a trouble of the device such as a suction error of the nozzle of the transfer head, and the operator is notified after the electronic component is out of stock. However, there is a problem that the tape feeder cannot be prepared for replacement.

In the case of the latter, the number of electronic components housed in the tape must be confirmed in advance, and after confirming the quantity, the quantity must be input to a computer. In addition, there is a problem that the number is wrong and an input error is likely to occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic component storage tape that can easily detect a shortage of electronic components in a tape feeder before the end of the tape.

[0007]

For this purpose, the present invention provides a first contact portion and a second contact portion which are in contact with a conductive portion formed along a length direction of an electronic component housing tape, and A control unit that measures the resistance value of both contact portions and divides this resistance value by the resistance value of one pitch of a pocket formed in an electronic component storage tape to detect a remaining number of electronic components. It is.

[0008]

According to the above arrangement, the control section measures the resistance between the first contact section and the second contact section and divides the measured value by the resistance value for one pitch of the pocket to obtain an electronic component. Of the electronic components can be easily detected before the end of the tape.

[0009]

(Embodiment 1) Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the tape feeder. Reference numeral 1 denotes a guide member that serves as a main body of the tape feeder F and guides the electronic component storage tape 3. A frame 2 is attached to a rear portion of the guide member 1. An electronic component storage tape 3 is provided at the rear of the frame 2.
Is wound around a supply reel 4 around which is wound, and a take-up reel 6 of a cover tape 3b peeled off from the electronic component housing tape 3 is mounted at the front of the frame 2.

Reference numeral 7 denotes a sprocket provided at a front portion of the guide member 1 for feeding the electronic component storage tape 3 led out from the supply reel 4 along the upper surface of the guide member 1 at a pitch. Reference numeral 8 denotes a peeling portion provided on the upper surface of the guide member 1, and peels the cover tape 3b from the electronic component housing tape 3 fed by the sprocket 7 at a pitch.
Reference numeral 9 denotes a transfer head, which picks up the electronic component P from the electronic component storage tape 3 by adsorbing it to the nozzle 10 and picks up the substrate S.
To be transported.

In FIG. 2, the supply reel 4 includes a cylindrical rotary shaft 4a rotatably mounted on a shaft core 2a of a frame 2, and a pair of discs 4 connected by the rotary shaft 4a.
b, 4c. Numeral 20 denotes a conductive washer interposed at the end of the rotating shaft 4a.
And rotate together. A terminal 21 is connected to the inner surface of the washer 20. The distal end of the terminal 21 extends through the through hole 22 of the disk 4 c into the supply reel 4, and is in contact with the upper surface of a conductive portion (described later) 13 at the end of the tape 3. Reference numeral 23 denotes a contact brush provided at the tip of the shaft core 2 a, and the tip 23 a is pressed against the washer 20. The brush 23 is connected to a control unit 24 (see FIG. 1) via a lead wire 25.

Next, the electronic component storage tape 3 will be described in detail. FIG. 3 is a perspective view of the electronic component storage tape 3. 3
Reference numeral a denotes a base tape that is a main component of the electronic component housing tape 3, and the cover tape 3b is removably adhered to the upper surface thereof, and the bottom tape 3c is adhered to the lower surface thereof. Further, pockets 12 are formed at regular intervals in the base tape 3a, and the electronic components P are stored in each pocket 12.

Reference numeral 13 denotes a conductive portion having a resistance which is a parameter of the number of remaining electronic components P, and is provided along the length direction of the electronic component housing tape 3. In the present embodiment, the conductive portion 13 is provided with a slight gap t from the side edge of the cover tape 3b in order to prevent the conductive portions 13 from short-circuiting in the state of being wound on the supply reel 4. Is provided. In FIG. 2, the tip of the terminal 21 is in contact with the upper surface of the conductive portion 13 near the end of the tape 3.

In FIG. 1, reference numeral 30 denotes a terminal, which is attached to the rear side of the peeling portion 8 of the guide member 1 via an insulating member 31 (see FIG. 4). The upper surface is lightly abutted so that the tape 3 can be smoothly fed in pitch. Reference numeral 32 denotes a lead extending from the terminal 30, and is connected to the control unit 24.

In FIG. 4, the control unit 24 includes a terminal 2
1 to measure the resistance value R of the conductive portion 13 between the terminal 1 and the terminal 30. This resistance value R is measured in advance and stored in the control unit 24 as a resistance value r (for one pitch of the pocket 12). By dividing by the electronic component P
And the remaining time until the remaining electronic component P is out of stock can be approximately detected. Control unit 2
As 4, a CPU or the like can be applied. As described above, the resistance value R of the conductive portion 13 between two points from near the end of the tape 3 to near the pickup point of the transfer head 9 is measured by the components 20, 21, 23 to 25, 30, 32. The resistance value measuring means is configured.

This device has the above-described configuration, and the operation will be described next. In FIG. 1, the sprocket 7 is driven to feed the electronic component storage tape 3 drawn out from the supply reel 4 at a pitch. On the way, the cover tape 3b is peeled off by the peeling section 8, and at the pickup position, the transfer head 9 moves up and down to pick up the electronic component P from the pocket 12 and transfer and mount it on the substrate S. In this way, while supplying the electric component P to the transfer head 9, the control unit 24 measures the resistance value R between the terminal 21 and the terminal 30, and calculates the remaining number of the electronic component P.

When the electronic component storage tape 3 is advanced and the remaining number of the electronic components P is reduced, the operator is notified, for example, by displaying a buzzer or a monitor television screen that the time to replace the tape feeder F has come. And the operator replaces the tape feeder F.

(Embodiment 2) FIG. 6 is a perspective view of an electronic component housing tape according to a second embodiment of the present invention.
Conductive portions 43a and 43b, which are short-circuited at the terminal portions, are formed on the upper surfaces of both side edge portions of b. In FIG. 5, 3
0a and 30b are terminals mounted on the guide member 1,
It is connected to the control unit 24 by the lead wires 32a and 32b.

FIG. 7 is a schematic diagram showing that the resistance value is being detected. A pair of terminals 30a and 30b are connected to conductive portions 43a and 43b.
Are constantly lightly abutted on the upper surface of the lead-out side, and the control unit 24 measures a resistance value R between the terminal 30a and the terminal 30b. By dividing by twice the value of (see FIG. 6),
The number of remaining electric components P is calculated. In the first embodiment, since the terminal 21 is in contact with the tape 3 wound on the reel 4, the structure and assembly are troublesome.
Since the terminals 30a and 30b are brought into contact with the tape 3 that is led out from the reel 4 and exposed on the guide member 1, the structure and assembly can be simplified.

The present invention is not limited to the above embodiment. For example, the conductive portion may be provided on the back surface or side surface of the tape 3. However, the side surface is not preferable because there is a risk of short-circuiting between those wound up and down while being wound on the supply reel 4. The conductive portion is formed by sticking a conductive tape, applying a conductive paint, or the like. However, the conductive portion does not necessarily need to be formed over the entire length of the tape 3 and may be formed only in a portion near the end of the tape 3. , Electronic components P
It can be detected that the number of the remaining has decreased. Of course, the conductive portion may be formed by forming the cover tape 3b, the bottom tape 3c, and the like with a conductive tape.

[0021]

As described above, according to the present invention, the first contact portion and the second contact portion which are in contact with the conductive portion formed along the length of the electronic component housing tape are provided. Since the control unit for measuring the resistance value of the electronic part and detecting the remaining number of electronic components is provided, the resistance value between the first contact part and the second contact part is measured, and the remaining number of electronic parts is measured. Can be easily detected, and thereby the out-of-stock of the electronic component can be detected before the end of the tape.

[Brief description of the drawings]

FIG. 1 is a perspective view of a tape feeder according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the same.

FIG. 3 is a perspective view of the electronic component storage tape according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing that the resistance value is being detected.

FIG. 5 is a perspective view of a tape feeder according to a second embodiment of the present invention.

FIG. 6 is a perspective view of an electronic component housing tape according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram showing that the resistance value is being detected.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 guide member 3 electronic component storage tape 4 supply reel 7 pitch feed means 12 pocket 13 conductive part 21 first contact part 24 control part 30 second contact part 30a first contact 30b second contact 43a conductive part 43b conductive Part F Tape feeder P Electronic component r Resistance value

Claims (1)

(57) [Claims] 1. A guide member for guiding an electronic component storage tape formed at regular intervals with pockets for storing electronic components, provided at a rear portion of the guide member, and wound around the electronic component storage tape. In a tape feeder provided with a supply reel and a pitch feeding means provided at a front portion of the guide member and feeding the electronic component storage tape at a pitch along the guide member, in a length direction of the electronic component storage tape, A first contact portion and a second contact portion that are in contact with the conductive portion formed along the first contact portion, and a control portion that measures the resistance value of both contact portions and detects the remaining number of electronic components is provided. Tape feeder characterized by the following.