JPH0629833Y2 - Magnetic tape winding device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is, for example, a reel around which a tape (hereinafter referred to as an original tape) in which a predetermined amount of a magnetic tape and a predetermined amount of a leader tape are alternately connected is wound. The present invention relates to a magnetic tape winding device that winds a trailer tape around the outermost and innermost circumferences as a supply reel, and winds a magnetic tape and a leader tape from the supply reel onto a hub or the like.

[Conventional technology]

An opaque magnetic tape that is arranged such that the light emitting element and the light receiving element sandwich the raw tape in a magnetic tape winding device that feeds the raw tape from a supply reel around which the raw tape is wound and winds it around a hub. When passes between the elements
A device is known in which a high level voltage is generated to generate a low level voltage when a transparent or translucent leader tape passes between elements. Here, for simplicity, the low level voltage will be referred to as “0” and the high level voltage will be referred to as “1”.

There are two methods for detecting this device as follows.
One is to count the time or the running distance of the original tape from the change position from the magnetic tape to the leader tape, that is, the time when it changes from "0" to "1", and output the output signal at the end of the count to stop the original tape running. Signal. The other is to detect the change position from the leader tape to the magnetic tape, that is, the time when the change from "1" to "0" is made, and use it as a stop signal similarly to the above.

Here, when the original tape having the outermost circumference and the innermost circumference being magnetic tapes is wound from the supply reel to the hub, the leader tape can be detected by any of the above methods. This is because the magnetic tape and the leader tape run alternately from the beginning to the end, that is, the opaque part and the transparent part run regularly and alternately.

[Problems to be solved by the device]

In the original tape in which the magnetic tape and the leader tape are wound alternately, in addition to the magnetic tape wound around the outermost circumference and the innermost circumference as described above, a trailer tape is used for both the outermost circumference and the innermost circumference. Some are called transparent or translucent tape. In the case of this raw tape, the trailer tape, the leader tape, and the magnetic tape run in the order of the outermost circumference, that is, the transparent portion, the transparent portion, and the opaque portion. In the innermost circumference, magnetic tape, leader tape,
In order of trailer tape, that is, opaque part, transparent part,
It will run in the order of the transparent part. In the case of winding the raw tape wound with the above trailer tape around the hub, the following problems occur in the conventional device. One is when the detection position is the change position from the magnetic tape to the leader tape, and the first leader tape cannot be detected at the outermost circumference. The other is when the detection position is the change position from the leader tape to the magnetic tape.
The problem is that the last leader tape cannot be detected and the trailer tape is wound around the hub at the innermost circumference.

In addition to these, some trailer tapes have opaque patterns. In this case, since the transparent portion and the opaque portion are sent in a complicated manner, the conventional apparatus cannot be wound at the outermost circumference.

Although there are problems such as the above, at present, it is dealt with by taking measures such as manually cutting the trailer tape. However, the above problems pose a major obstacle to further automation, such as installing a plurality of supply reels.

Therefore, the present invention was made by focusing on the above problems,
It is an object of the present invention to provide a magnetic tape winding device which does not require manual work and is automated.

[Means for Solving the Problems]

In order to achieve the above object, the present invention has the following configuration.

The supply means for supplying the raw tape from the supply reel around which the raw tape is wound, the winding means for winding the raw tape, the measuring roller that rotates with the running of the raw tape, and the rotation of the measuring roller to detect and measure. Measuring pulse generating means for generating a scale pulse, detection signal generating means for detecting a transparent portion and an opaque portion and generating a detection signal, a leader tape is detected based on the measuring pulse and the detection signal, and a stop signal is generated. In a magnetic tape winding device including a tape running stop circuit that is generated, when the tape running stop circuit detects first and second counting means for counting detection pulses and a change position from a transparent portion to an opaque portion. The first counting means is selected, and the second counting means is selected when the change position from the opaque portion to the transparent portion is detected.

[Action]

In the magnetic tape winding device configured as described above,
When the outermost circumference and the innermost circumference are trailer tapes, the outermost circumference can detect the change position from the leader tape to the magnetic tape, and thereafter can detect the change position from the magnetic tape to the leader tape. Also, an opaque part having a short length such as a trailer tape pattern is not detected.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 shows an apparatus for winding a magnetic tape 3a and a leader tape 3b on a hub 9 according to an embodiment of the present invention. Three
Is an original tape, and a predetermined amount of an opaque magnetic tape 3a and a transparent or semitransparent leader tape 3b are alternately bonded. Reference numeral 1 is a supply reel, on which an original tape 3 of several tens of commercially available cassette tapes is wound. Reference numeral 2 is a motor that is a supply means, and drives the supply reel 1 to rotate. Reference numeral 4 is a measuring roller, which rotates while contacting the raw tape 3. Reference numeral 6 is a disk having a plurality of holes regularly, and is fixed to the shaft 5 of the measuring roller 4. Reference numeral 7 denotes a measuring pulse generating means including a light emitting element 7a and a light receiving element 7b, which are installed so as to sandwich the disk 6 between the light emitting element 7a and the light receiving element 7b. 8 is a light emitting element 8a and a light receiving element 8b
Is a detection signal generating means for detecting a transparent portion and an opaque portion and generating a detection signal, and is arranged so as to sandwich the original tape 3 between the light emitting element 8a and the light receiving element 8b. 9 is a hub, around which the raw tape 3 is wound. Reference numeral 10 denotes a hub fixed shaft, which holds the hub 9 therein. 11 is a motor, the hub fixing shaft 10 is fixed, the hub 9 is driven to rotate, and the original tape 3 is wound around the hub 9. That is,
The hub 9, the hub fixed shaft 10, and the motor 11 constitute tape winding means. Reference numeral 12 is a measuring pulse output from the measuring pulse generating means 7. Reference numeral 13 is a transparent portion detection signal output from the detection signal generating means 8. Reference numeral 14 is a tape running stop circuit that generates a stop signal based on the measuring pulse 7 and the transparent portion detection signal 13. This device
The original tape 3 sent from the supply reel 1 is wound around the hub 9, the leader tape 3b is cut at an arbitrary cutting position A of the leader tape 3b, and one end of each is locked to the newly supplied hub 9. It is a thing. The cutting means and the hub locking means are not shown in the drawings.

Here, the distance from the cutting position A of the leader tape 3b to the detection signal generating means 8 is L ₁ .

FIG. 2 shows the original tape 3 in which a predetermined amount of the magnetic tape 3a and the leader tape 3b are regularly arranged. Third
The figure shows the outermost circumference of the raw tape 3 including the transparent or translucent trailer tape 3c with the pattern 28. The raw tape 3 runs in the direction of the arrow, and the trailer tape 3c,
The leader tape 3b and the magnetic tape 3a are arranged in this order. Fig. 4 shows the trailer tape 3c with the pattern 28
Represents the innermost circumference of the raw tape 3 including. The raw tape 3 runs in the direction of the arrow, and the magnetic tape 3a, the leader tape 3b,
The trailer tapes 3c are arranged in this order. In each of the original tapes, a predetermined amount of magnetic tape and leader tape are alternately wound regularly except for the outermost circumference and the innermost circumference.

In FIG. 2, A is a cutting position for cutting the leader tape, B is a changing position from the magnetic tape to the leader tape,
C represents the change position from the leader tape to the magnetic tape. Here, the length of the leader tape, that is, B to C
Let the distance to be L ₂ . As is, the distance from B to A is L ₃ .

In FIG. 3, the running direction of the width of the original tape 3 pattern 28 that are included in the trailer tape 3c and L _4.

The length L ₂ of the leader tape and the cutting position A are shown in FIG.
The same applies to FIGS. 3 and 4. Also, the width L ₄ of the trailer tape pattern is the same in FIGS. 3 and 4.

FIG. 5 shows an embodiment of the tape running stop circuit 14.

First, the circuit configuration will be described.

The transparent portion detection signal 13 is connected to one of the set terminal of the RS flip-flop 17 and the input terminal of the OR gate 18. The output of the RS flip-flop 17 is connected to the other input terminal of the OR gate 18 and one input terminal of the AND gate 23. The leader / trailer switching signal 16 sent from the well-known CPU 29 is connected to the other input terminal of the AND gate 23. The output of the OR gate 18 is connected to the reset terminal of the counter 19, which is the first counter means. The measuring pulse 12 is connected to one of the input terminals of the counter 19 and the AND gate 25. The output terminal of the counter 19 is the inverter 20
Of the inverter 20 and the output terminal of the inverter 20 are connected to the set terminal of the RS flip-flop 21. The CPU
The detection start signal 15 sent from 29 is connected to the reset terminals of the RS flip-flop 17 and the RS flip-flop 21. The output terminal of the RS flip-flop 21 is connected to the input terminal of the inverter 22, and the output terminal of the inverter 22 is connected to one of the input terminals of the OR gate 24. The output terminal of the AND gate 23 is connected to the other input terminal of the OR gate 24. The output terminal of the OR gate 24 is connected to the remaining input terminal of the AND gate 25,
The output terminal of the AND gate 25 is connected to the input terminal of the counter 26 which is the second counter means, and the output signal of the counter 26 becomes the stop signal 27.

Next, the operation of the circuit will be described.

Here, the transparent portion detection signal 13 is assumed to be in a "0" state when it is transparent and in a "1" state when it is opaque. The measuring pulse 12 is generated by the measuring pulse generating means 7 by detecting a plurality of holes in the disk 6, and repeats "0" and "1". Also, leader / trailer switching signal
A signal is output from the CPU 29 so that 16 is in the trailer side, that is, "0" at the beginning or the outermost periphery of the original tape changing operation, and in the other side, it is the leader side, that is, "1".

First, at the beginning of the detection operation, the detection start signal 15 becomes "0" and the RS flip-flops 17 and 21 are reset. The next operation will be described separately for each case.

(1) When magnetic tape and leader tape are sent alternately This is the case of Fig. 2 and it is the part other than the outermost and innermost parts of the original tape. 16 is the leader side, that is, "1"
Take the state of. The transparent portion detection signal 13 is initially the magnetic tape 3a.
Is detected and the state of "1" is taken. At this time, the output of the RS flip-flop 17 remains "0", the output of the OR gate 18 becomes "1", and the counter 19 does not operate. Also A
The output of the ND gate 23 remains "1" and the counter 26 does not operate. Next, the leader tape 3b is detected, and the transparent portion detection signal 13 is set to "0". Also at this time OR gate
The output of 18 remains "1" and the counter 19 does not operate. Further, the output of the RS flip-flop 17 becomes "1" and the output of the AND gate 23 becomes "0". As a result, the counter 26 counts the measuring pulse 12. At this time, the counter 26 is set by the CPU 29 so as to count the measuring pulse 12 of the length L ₁ + L ₃ of the original tape 3 and output the stop signal 27.

Further, even if the counter 26 detects the magnetic tape 3a during counting, since the output of the RS flip-flop 17 is set to "1", the counter 26 is not affected at all.

(2) When the trailer tape is wound around the outermost circumference This is the case of FIG. 3, and the signal from the CPU 29 causes the leader tape / trailer tape switching signal 16 to be on the trailer side, that is, "0". First, the transparent portion is detected, and the transparent portion detection signal 13 takes the state of "0". At this time, the output of the RS flip-flop 17 becomes "1",
Since the signal from the leader / trailer switching signal 16 is "0", the output of the AND gate 23 remains "1". Therefore, the counter 26 does not operate. Since the transparent portion detection signal 13 is "0", the output of the OR gate 18 is "1" and the counter 19 does not operate. Next, the pattern 28 of the trailer tape 3c is detected, and the transparent portion detection signal 13 takes the state of "1". At this time, RS flip-flop 17
The output of 1 holds the state of "1", and the output of the OR gate 18 becomes "0". This causes the counter 19 to have a measuring pulse 12
Start counting. Here, counter 19 is raw tape 3
It is set by the CPU 29 to output an output signal after counting the measuring pulse 12 for the length Pn. Pn is L ₄ <P
The size is set to satisfy n <L ₁ − (L ₂ −L ₃ ). Since the length L ₄ of the pattern 28 is smaller than Pn, the transparent portion detection signal 13 becomes “0” and the counter 19 is reset before the count length exceeds Pn. As a result, the counter 26 does not operate and the stop signal 27 is not output even if there are any patterns 28 on the trailer tape 3c. Then, the trailer tape 3c and the leader tape 3b pass by, the magnetic tape 3a, that is, the opaque portion is detected, and the transparent portion detection signal 13
Becomes "1". At this time, since the output of the RS flip-flop 17 is still holding "1", the output of the OR gate 18 becomes "0".

As a result, the counter 19 starts counting again, and outputs an output signal when counting the amount of Pn. Then, the output of the RS flip-flop 21 is set to "1", and the counter 26 starts counting the output of the measuring pulse 12. Then, the counter 26 outputs a stop signal 27 after counting L ₁ − (L ₂ −L ₃ ) −Pn. Here, the count amount until the RS flip-flop 21 outputs is L ₁ + L when the leader / trailer switching signal is on the leader side.
₃ , L _1- (L ₂ -L ₃ ) -P when on the trailer side
The CPU 29 controls so as to take n.

(3) When the trailer tape is wound on the innermost circumference This is the case of FIG. 4, and the signal from the CPU 29 causes the leader tape / trailer tape switching signal 16 to be on the leader side, that is, "1". After that, the stop signal 27 is output in the same manner as (1).

(4) When the magnetic tape is wound around the outermost circumference This is similar to the case of (1), but since it is the outermost circumference setting, the leader / trailer switching signal 16 is set to the trailer side, that is, "0". It takes the state of ". The transparent portion detection signal 13 first detects the magnetic tape 3a and assumes the state of "1". At this time, the output of the RS flip-flop 17 remains "0", the output of the OR gate 18 becomes "1", and the counter 19 does not operate. The output of AND gate 23 is also "1".
As it is, the counter 26 does not operate. Next, the leader tape 3b is detected, and the transparent portion detection signal 13 is set to "0". Also at this time, the output of the OR gate 18 becomes "1" and the counter 19 does not operate.

Further, the output of the RS flip-flop 17 becomes "1", but the output of the AND gate 23 remains "1" because the leader / trailer switching signal 16 is "0".
Counter 26 does not work. Next, the transparent portion detection signal 13 detects the magnetic tape 3a and becomes "1". Since the output of the RS flip-flop 17 is still holding "1", the output of the OR gate 18 is "0". As a result, the counter 19 starts counting and outputs an output signal when counting the amount of Pn. Then RS flip-flop 21
Is set to "1", and the counter 26 starts counting the output of the measuring pulse 12. Then, the counter 26 outputs a stop signal 27 after counting L ₁ − (L ₂ −L ₃ ) −Pn. As a result, the tape running can be stopped at the correct position without any problem even when the magnetic tape is wound around the outermost circumference or when the original tape cut from the middle is wound.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

Even when winding the raw tape from the supply reel that has the trailer tape, the trailer is detected by detecting the time when the outermost circumference changes from the transparent part to the opaque part and detecting the time when the outermost part changes from the opaque part to the transparent part. It becomes possible to cut the tape automatically. This makes it possible to supply a magnetic tape winding device having a plurality of supply reels.

[Brief description of drawings]

FIG. 1 is an overall schematic view of a magnetic tape winding device of the present invention, FIGS. 2, 3 and 4 are arrangement diagrams of original tapes, and FIG. 5 is a tape running stop circuit diagram. 1 ... Supply reel, 3 ... Original tape, 3a ... Magnetic tape, 3b ... Leader tape, 3c ... Trailer tape, 4 ... Measuring roller, 7 ... Measuring pulse generating means,
8 ... Detection signal generating means, 12 ... Scale pulse, 13 ... Transparent part detection signal, 14 ... Tape running stop circuit, 15 ... Detection start signal, 16 ... Leader / trailer switching signal,
17 ... RS flip-flop, 19 ... counter, 21 ...
… RS flip-flop, 26 …… counter, 27 …… stop signal, 28 …… pattern.

Claims (1)

[Scope of utility model registration request] 1. A supply means for supplying the tape from a supply reel wound with a tape in which predetermined amounts of a magnetic tape and a leader tape are alternately connected, a winding means for winding the tape, and the tape. , A measuring roller which rotates with the running of the measuring roller, a measuring pulse generating means for detecting the rotation of the measuring roller and generating a measuring pulse, and a detection signal generating for detecting a transparent portion and an opaque portion and generating a detection signal. In the magnetic tape winding device comprising a means and a tape running stop circuit that detects a leader tape based on the measuring pulse and the detection signal and generates a stop signal, the tape running stop circuit outputs the measuring pulse. The first and second counting means for counting and the first counting means when the change position from the transparent portion to the opaque portion is detected, and the transparent portion from the opaque portion is selected. Magnetic tape winding device, characterized in that it comprises a selection means for selecting a second count means upon detection of a change in position of the.