JP2000281014A - Method and device for measuring length of carrier tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure the length of a carrier tape at high speed, improve the take-up performance and accuracy thereof to a large extent and easily realize the full-automation of a take-up device. SOLUTION: A carrier tape 4 is taken up from a raw fabric tape 5 onto a take-up roll 6 of a take-up mechanism, and the carrier tape 4 is cut by a tape cutting mechanism 7 after taking up the given length in a carrying tape length measuring device, and the device is provided with a driving roll 8 and a drive receiving roll 9 for a sprocket or the like transferring the carrier tape 4 in the longitudinal direction and a guide roll 10 brought into contact with both sides of the carrier tape 4 and guiding the same, and a plurality of sensor detecting sections 11 for sensing transfer holes are provided with phase differences facing a passage line of the transfer holes of the carrier tape 4, and a monitor control section 13 is provided on a phase difference measuring device 12 communicated with the sensor detecting sections 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for measuring the length of a carrier tape used for housing various electronic components.

[0002]

2. Description of the Related Art Various electronic parts are wound from a raw material tape body (a large amount of carrier tape is wound) so as to be suitable for carrying, storing or loading into mounting equipment by storing many electronic parts in a carrier tape. The required amount is measured on a take-up reel, wound up, stored in small portions, and sold and shipped.

A conventional carrier tape has a large number of recesses for accommodating electronic components and a sprocket hole (hereinafter referred to as a feed hole) for transfer at a predetermined pitch in the longitudinal direction of the tape. The pin roll is rotated by winding the pin around the rolled cylindrical roll (hereinafter referred to as a pin roll) in the feed hole of the carrier tape, and the number of rotations is counted by a counting mechanism to measure the amount of winding on the take-up reel. The winding operation is being performed.

[0004]

However, according to the conventional length measuring technique in the carrier tape winding operation, when the winding speed of the carrier tape, that is, the length measuring speed is increased in order to enhance the working efficiency, the carrier tape is increased. Due to the friction between the feed hole and the pin of the pin roll, the feed hole cannot be inserted smoothly into the pin, and the length measurement error increases.
In addition, if the measuring speed is increased, the inertia torque due to the weight of the pin roll itself will increase, and the pin roll pin will come off from the feed hole when the length measurement is stopped, hindering the next winding operation. Since the pin of the pin roll must be inserted into the feed hole, manual work of winding preparation is required repeatedly, which is a major obstacle to fully automatic length measurement, cutting and winding equipment, and carrier tape in the counting mechanism. The detection accuracy of the sensor has deteriorated due to deterioration or failure of the detection mechanism of the feed hole, and dust and dirt attached to the sensor detection part when using an optical sensor cause malfunction, and the accurate count number is detected and maintained for a long time It is difficult to perform the measurement, and there are problems such as a defect in detection of count and a decrease in operation rate. The present invention is intended to eliminate these conventional disadvantages, and can measure the length of a carrier tape at a high speed, greatly improve the processing performance and accuracy, and increase the safety factor without erroneous operation. The present invention relates to a method and apparatus for measuring the length of a carrier tape, which can easily automate the entire operation.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a carrier tape provided with a housing recess for accommodating a large number of electronic components arranged at predetermined intervals in a longitudinal direction and a tape feed hole is provided on a take-up reel by a predetermined amount. In the method for measuring the length of a carrier tape by the feed hole count detection mechanism and cutting the carrier tape by a predetermined amount when winding, a plurality of sets of feed holes are provided as the feed hole count detection mechanism. The detection and counting is performed by the phase difference detection device, and the occurrence of a shift in the count number is monitored and controlled by the phase difference detection device.

According to the present invention, a winding mechanism for winding a carrier tape in which a large number of recesses for accommodating electronic components and a plurality of feed holes for a carrier tape are provided at predetermined intervals in the longitudinal direction of the tape. In a carrier tape length measuring device which winds a reel and winds a carrier tape by a tape cutting mechanism after winding a predetermined amount, a drive roll and a drive receiving roll for transporting and running the carrier tape in a longitudinal direction, and on both sides of the carrier tape. A guide roll that guides the carrier tape in contact with the sensor tape, and a plurality of sensor detectors for detecting the feed holes are provided at a plurality of intervals with a phase difference facing the passage of the feed holes of the carrier tape, and are connected to the sensor detectors. The above-mentioned phase difference detection device is provided with a monitoring control unit.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, the length of a carrier tape is measured by counting the number of feed holes such as sprocket holes of the carrier tape using a plurality of sets of phase difference detecting devices. By causing a plurality of sets of feed hole phase difference detecting devices to be in non-contact with the feed holes of the carrier tape, friction between the sprocket holes and the pins, such as occurs at the time of conventional high-speed measurement of the carrier tape using a pin roll, or The problem caused by the contact with the carrier tape (sprocket hole) that the sprocket comes off from the pin due to the rotation of the pin roll itself due to inertia can be solved. In addition, during measurement, the operation is simply to pass the carrier tape through a plurality of sets of sensor detectors with phase differences. This makes it easy to fully automate length measurement, cutting, and winding, and the carrier tape feed hole Using a phase difference counting mechanism provided with a plurality of sets of detectors based on the phase difference added to the feed hole pitch, a control system that constantly monitors during length measurement whether there is a deviation in the counts between each other eliminates the conventional problems. Solved.

The embodiment of the present invention will be described with reference to FIGS. 1 to 7. A large number of recesses 1 for accommodating electronic components and feed holes 2 for a carrier tape are provided at predetermined intervals in the longitudinal direction of the tape. The carrier tape 4 is wound from a raw tape body 5 onto a take-up reel 6 of a take-up mechanism, and the carrier tape 4 is cut by a tape cutting mechanism 7 after winding by a predetermined amount. A drive roll 8 and a drive receiving roll 9 such as sprockets for transporting the carrier tape 4 in the longitudinal direction and a guide roll 10 for abutting and guiding both sides of the carrier tape 4 are provided. Hole 2
A plurality of sensor detectors 11 for detecting perforations are provided at a plurality of intervals with a phase difference facing the passageway, and a phase difference detector 12 connected to the sensor detector 11 is provided with a monitoring controller 13 and a carrier tape. As a length measuring device.

When the carrier tape 4 is transported from the raw tape body 5 in the longitudinal direction and wound on the take-up reel 6 by a predetermined amount, the feed holes 2 are detected and counted, and a predetermined predetermined number is selected. To cut the carrier tape by the count amount, the moving carrier tape 4 is passed through a plurality of sets of sensor detectors 11 of the phase difference detector 12, and the feed holes 2 are detected by the sensor detector 11, and the phase difference is detected. The detection device 12 monitors and controls the occurrence of a shift in the count number between the two. The length of the carrier tape to be wound can be measured at a high speed, and the processing performance and accuracy are greatly improved. And the winding operation can be fully automated easily.

In this case, the sensor detector 11 is an optical sensor such as a photoelectric sensor, a fiber sensor, or a laser sensor, and detects the feed hole 2 of the carrier tape 4 and repeats ON-OFF. Is sent to the phase difference detection device 12 and the monitoring control system monitors whether there is any deviation in the count result. That is, the sensor detector 11
Monitors the counts obtained by detecting the phase differences between the plural sets of optical sensors during the length measurement by the monitoring control unit, and when a difference of 5 counts or more occurs in the counts, an error alarm or display is made.

For example, the sensor detecting section 11 is provided with a pair of optical fiber type sensors on the guide section 30 of the plural sets of carrier tapes 4 and determines the distance between the sensors of each set by the feed hole pitch (4. 00 mm) + feed hole phase difference, and as shown in FIG. 5, by passing the product of the carrier tape 3 in the direction of the arrow, the optical fiber sensors 31 (A), (B), and (C)
The feed hole 2 is detected in (D), and ON / OFF is repeated according to a detection timing chart as shown in FIG. By counting these detection charts by the phase difference detection device 12, count results of a large number of feed holes can be obtained. The control system constantly monitors whether there is any deviation in these count results during the length measurement.

The carrier tape 4, which is unwound from the raw material tape body 5 on which the carrier tape 4 is wound on a reel, has optical fiber sensors 31 (A) and 31 (A).
(B), 31 (C), and 31 (D), which run on the guide portion 30 and are wound on the take-up reel 6, but are disposed opposite to the drive roll 8 for transferring the tape 3. The roll 9 and the guide roll 10 are provided on a slidable slide table 14. The slide table 14 is connected to a moving servomotor 15, and is arranged so as to be movable in the width direction of the carrier tape 4. It is preferable to set a width of 4 so as to correspond to travel guidance.

A driving touch roll 18 is mounted on a driving roll 8 so as to be swingable on a pivot arm 17 on a traveling path of the carrier tape 4, and is transferred by a balance weight 16 at the other end. The drive touch roll 18 is lightly pressed against the drive roll 8 side so that the feed hole 2 does not come off and the transfer can be reliably performed without slippage. Further, the drive roll 8 uses a rotating sprocket inserted into the feed hole 2 of the carrier tape 4 and is rotationally driven by a drive servomotor 19 to guide the guide rolls 10 and 10 to run the carrier tape 4 and regulate the tape width. The carrier tape 4 is guided at a high speed along the press roller 20 of the tape press from above and is transferred onto the guide section 30 at a high speed.
The take-up reel 6 rotates at 6.

The monitoring controller 13 reads an IC card storing various data such as product length count data, product width, and reel type, and transfers the data to a programmable controller. It has a function of directly adjusting various data of the programmable controller using the panel, and a function of displaying various data of the current product type and a remaining count until the product is automatically cut by the cutter on the touch panel.
The remaining count is determined by the phase difference count of the detection output of the optical fiber sensor 31 by the programmable controller, and further, it is confirmed that the count of each set does not deviate by more than 5 counts. This is a value obtained by subtracting the current count value from the length count data. The control of each mechanism drive motor and the operation / stop control of the cutter mechanism 7 are controlled by a programmable controller (a contour roller installed inside the main body). The same programmable controller also monitors whether there is a deviation beyond the count.

The control process according to the present invention will be described with reference to FIG. In the initial setting, an IC card storing product data is inserted into the monitoring control unit 13, and a card readout switch (touch panel) is pressed. Next, the data of the IC card is transferred to the programmable controller, and the data of the programmable controller is read, and when the confirmation switch (touch panel) for displaying various data of the current type on the touch panel is pressed, the servo motor is operated, The slide table 14 is moved to set the guide width and complete the initial setting. In the case of an exceptional product (such as a sample), data is entered into the replacement programmable controller using a touch panel to perform processing. That is, first, an IC card storing product data is inserted into the monitoring controller 13, and various data are written to the programmable controller by pressing a card readout switch (touch panel). Next, press the confirmation switch (touch panel) to operate the servo motor, move the slide for width setting,
The guide widths of the carrier tapes are made to coincide with each other, and thereafter a series of processing shown in FIG. 7 is executed. In performing this series of normal winding operations, count comparison and determination (abnormality determination by a count pulse comparison and determination cycle) are performed at each stage. Then, the normal winding operation is repeated only when no abnormality occurs, so that the winding operation can be smoothly performed.

In the phase difference detecting device, the count sensors A and B of the sensor detecting section 11 are set as the phase difference, and the count sensors C and D are set as the phase difference (count input addition) → (<+ 5 count) → (> −). 5 pulses) → (<+ 5 counts) → (> − 5 counts) → (count-in addition) Monitors by a circulating method for each pulse addition that circulates, and compares and judges count pulses.

Next, an embodiment of the present invention will be described. Example 1 A carrier tape to be wound has a width of 8 mm and a thickness of 0.25.
mm and 1.45mm ×
A product provided with an electronic component accommodating recess having a size of 2.2 mm and a depth of 1.4 mm and a sprocket hole (feed hole) having a pitch of 4 mm was used. The guide width of the carrier tape traveling path was 8.2 mm, and a clearance of 0.2 mm was provided for the product width. Further, the sensor detecting section for detecting the sprocket hole uses four optical fiber sensors (two sets), and the distance between the sensors of each set is determined by the sprocket hole pitch (4.00 mm) + sprocket hole diameter (1.5).
mm) / 3. Furthermore, the count number obtained by detecting the phase difference between the two sets of sensors is constantly monitored by the control system during length measurement, and the count number is 5 counts (20 mm in length).
When the above difference occurred, it was determined that a length measurement error occurred. Since the response speed of the sensor used in the sensor detection unit is 0.25 sec, the number of times of calculation is 1.5 m
m (sprocket hole diameter) /0.25 (msec), and the maximum processing length of this apparatus is 6.0 m / sec (360 m / sec).
/ Min). Actually, stable length measurement was possible under the condition that the guide passage speed of the product was 3.0 m / sec. That is, in this embodiment, the carrier tape measuring capability is 180 m at a safety factor of 50% (50% of the sensor response speed).
/ Min, which is a result of a processing performance that is six times the conventional measuring speed of 30 m / min. In addition, the length measurement in this system can be performed simply by passing the carrier tape through the guide. Full automation of the winding operation could be made easy.

[0018]

According to the carrier tape winding method of the present invention,
In the carrier tape length measuring method of detecting and counting the feed holes and cutting the carrier tape by a selected predetermined count amount, the moving carrier tape is passed through a plurality of sets of sensor detectors to detect the feed holes. The carrier tape can be measured at a high speed by counting with the phase difference detection device and monitoring the occurrence of a deviation in the mutual count number, thereby greatly improving the processing performance and accuracy, and erroneous operation. There is no safety factor and the winding operation can be fully automated easily. Further, in the carrier tape length measuring device of the present invention, since it is possible only to pass the carrier tape through the guide, it is not necessary to take the troublesome work of inserting the pin of the pin roll into the sprocket hole by the manual work as in the related art. Even if the operation of the apparatus is fully automated, the winding can be carried out safely without interfering with the conventional transport of the carrier tape, and the operation rate and the length measurement accuracy can be greatly improved.

[Brief description of the drawings]

FIG. 1 is an overall plan view of an apparatus used in the method of the present invention.

FIG. 2 is a side view of the example of FIG.

FIG. 3 is a partially cut-away enlarged plan view of the example of FIG. 1;

FIG. 4 is a partially enlarged side view of the example of FIG. 3;

FIG. 5 is a schematic diagram showing a length measurement inspection state of the carrier tape in the example of FIG. 1;

FIG. 6 is a detection timing chart at the time of length measurement in the example of FIG. 5;

FIG. 7 is a flowchart of a carrier tape winding processing operation of the example of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 electronic component housing recess 2 feed hole 3 tape 4 carrier tape 5 raw material tape body 6 take-up reel 7 tape cutting mechanism 8 drive roll 9 drive receiving roll 10 guide roll 11 sensor detector 12 phase difference detector 13 monitoring controller 14 Slide table 16 Balance weight 18 Drive touch roll 20 Holding roller 30 Guide part 31 Optical fiber sensor

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 2F065 AA22 BB12 BB15 BB27 DD06 DD08 FF02 FF32 GG06 GG12 HH15 JJ01 JJ05 JJ15 LL02 MM03 PP22 QQ13 QQ51 SS09 TT08 2F069 AA34 BB34 BB40 CC09 DD08GG15 DD16 DD03 DD16

Claims (4)

[Claims] When winding a carrier tape provided with a housing concave portion for accommodating a large number of electronic components arranged at predetermined intervals in a longitudinal direction and a tape feed hole on a take-up reel, a predetermined amount is provided.
In the carrier tape length measuring method of measuring the length of the carrier tape with the feed hole count detection mechanism and cutting the carrier tape by a predetermined amount, a plurality of sets of phase difference detection devices are used as the feed hole count detection mechanism. A carrier tape length measuring method, wherein detection and counting are performed by using the phase difference detection device, and the occurrence of a shift in the count number is monitored and controlled by the phase difference detection device. 2. The sensor detecting section monitors the count number obtained by detecting the phase difference between a plurality of sets of sensors during length measurement by a monitoring control section, and when a difference of 5 counts or more occurs in the count number. The method for measuring the length of a carrier tape according to claim 1, wherein an error warning or an error is displayed. 3. A take-up reel of a take-up mechanism, wherein a large number of carrier tapes having a plurality of storage recesses for accommodating electronic components and a feed hole of a carrier tape are provided at predetermined intervals in a longitudinal direction of the tape. In a carrier tape winding device that cuts a carrier tape by a tape cutting mechanism after a predetermined amount of winding, a drive roll and a drive receiving roll that transport and run the carrier tape in a longitudinal direction, and contact and guide both sides of the carrier tape. A phase difference detecting device comprising a guide roll and a sensor detecting unit for detecting a feed hole facing the passage of the feed hole of the carrier tape with a plurality of intervals provided with a phase difference therebetween, and communicating with the sensor detecting unit. A carrier tape measuring device, further comprising a monitoring control unit. 4. The sensor detection unit according to claim 3, wherein a plurality of optical fiber sensors are provided as a set of two optical fiber sensors, and a distance between the sensors of each set is provided by a feed hole pitch of the carrier tape + a feed hole phase difference. The carrier tape length measuring device as described in the above.