JPS6032893B2 - Magnetic tape transfer device - Google Patents

Description

[Detailed description of the invention]

The present invention involves winding up a recorded master tape and an unrecorded slave tape with their magnetic surfaces in close contact with each other, applying a transfer bias (transfer magnetic field), and transferring the master tape signal to the slave tape. This relates to a magnetic tape transfer device that uses a batch winding method, and is configured to automatically perform various operations such as winding the tape, applying a transfer magnetic field, and unwinding the tape in sequence. The purpose of the present invention is to provide an apparatus that can produce high-quality tapes more quickly and easily. Conventionally, the means to stop the rotation of the take-up reel are as follows:

[a] Detects and stops the trailer tape of the master tape or slave tape. (b) By selecting the transfer time setting switch of 30 minutes, 6 minutes, or 120 minutes in advance, the predetermined winding time can be set. There were methods such as stopping the winding when the total number of windings of the master tape was reached, or detecting the audio signal stored on the master tape and stopping the winding. However, with method (a), even if the master tape has a 5-minute memory content, if a 6-minute slave tape is used, it must be completely wound. More than 90% of the time is wasted. [The same can be said for method b-.Of course, the time required for winding and unwinding is short, but a large amount of time is wasted. When transferring, it is clear that the above-mentioned wasted time becomes a serious problem when creating a transfer tape.For method c), the audio signal is always recorded in the same way as the video signal. However, this is not always the case.The present invention detects the total number of reels to be wound for collectively winding recorded master tapes and unrecorded slave tapes. Then, the total number of reel windings calculated from the recording time of the master tape is compared, and when the former value matches the latter value, the above-mentioned method is performed by stopping the winding by the winding tape. This problem has been solved.The embodiment will be described in detail below with reference to the drawings.Fig. 1 is a diagram showing its configuration, and Fig. 2 is a diagram showing its circuit configuration.In the figure, 1 is a supply reel on which a recorded master tape 2 is wound, and is driven by a motor 3. 4 is a supply reel on which a recorded slave tape 5 is wound, and is driven by a motor 6. 7 is a master tape 2 is an air column for controlling tape tension, and suctions the master tape 2 by a vacuum source (not shown) connected to an air suction port 8. 3 is a light emitting element attached to the air column 7, and 10 is a light emitting element. It is a light receiving element that detects the table loop position in the air column 7, controls the motor 3 via the master reel control circuit 11, controls the table loop position in the air column 7 to be kept constant, and controls the position of the table loop in the air column 7. The tape tension is always kept constant. Reference numeral 12 is an air column for controlling the tape tension of the slave tape 5, and it has a light emitting element 13, a light receiving element 14, an air suction port, and the like as the configuration on the master tape 2 side. 15, and keeps the tape tension of the slave tape 5 constant. The respective tape tension is determined by the vacuum pressure of the vacuum source. Reference numeral 16 denotes a winding reel, which winds up the master tape 2 and the scrape tape 5 with their magnetic surfaces brought into close contact with each other. The winding reel 16 is driven by a motor 17. A rotation detector 18 is attached to the winding reel shaft, and is composed of an encoder disk 19, a light emitting element 20, and a light receiving element 21. The signal detected by the rotation detector 18 is multiplied by a multiplier 22 and then supplied to a winding roll control circuit 23 . The control circuit 23 is configured to use the output signal of the multiplier 22 to rotate the motor 17 at a constant rate. A transfer bias magnetic field is applied to both tapes 2 and 5 wound on the winding reel 16 by a magnetic field generator 24 . After the transfer is completed, each tape 2, 5 is transferred to the supply reel 1,
At this time, the audio signal of the master tape 2 is reproduced by the reproduction head 25 and re-recorded on the slave tape 5 by the recording head 26. Reference numeral 27 denotes an erasing head, which is used to erase only the audio signal of the slave tape 5 that has been transferred by applying a transfer bias magnetic field. 28 and 29 press both tapes 2 and 5 together to connect both tapes 2 and 5.
This is a pressure roller for eliminating the air layer existing between the magnetic layers, ensuring good adhesion, and reducing gap loss during transfer, and is pressed against the take-up roll 16 by springs 30 and 31. 32, 33, 34, 35 are guide posts for running the master tape 2, and 36, 37, 38, 39 are guide posts for running the slave tape 5. Reference numerals 40 and 41 indicate position regulating rollers for both the tapes 2 and 5, which are used to wind up the tapes 2 and 5 onto the winding reel 16 after the tapes have been positioned. Reference numerals 42 and 43 are a light emitting element and a light receiving element, respectively, for detecting the trailer section provided at the end of the master tape 2, and 44 and 45 are light emitting elements for detecting the trailer section of the slave tape 5. These are light receiving elements, and the magnetic tape transfer device is automatically operated by these elements. To further explain the explanation using FIG. 2, 46 is a low shoe attached to the master tape supply reel ball, 47 is a brake shoe, and 48 is a solenoid that operates the brake shoe, which is also operated by the signals of these sequential control circuits 49. . The brake shoe 47 is a spring (not shown) that does not contact the roller 46 while the master reel 1 is rotating, and operates the solenoid 48 when it is desired to stop the master reel 1.
The brake shoe 47 is brought into contact with the roller 46 to apply a brake to the master reel 1. At this time, it goes without saying that a motor stop signal is sent to the master reel motor control circuit 11 from the sequential control circuit 49. 50 is a roller attached to the winding reel shaft, 51 is a brake shoe, 52 is a solenoid,
Like the master axis, this constitutes the brake. 53 is a roller attached to the slave tape reel shaft, 54 is a brake shoe, and 55 is a solenoid, which constitute a brake. 56 is a frequency divider, which divides the output signal of the multiplier 22,
It is supplied to the sequential control circuit 49 as one pulse per rotation. If you look at the take-up roll 16 in detail, as shown in FIG. The master tape 2 is pressed against the wall of the slit 57 by the rubber 60. slave tape 5
is similarly pressed against the wall of the slit 58 by a compression rubber 62 pulled by a spring 61. In this state, hold one end of the master tape 2 and slave 5, and turn the take-up roll 1.
3. Roll it tightly on top. Hereinafter, calculation of the total number of windings of the winding roll when winding is stopped will be explained. In FIG. 4, if the time during which the master tape information signal was recorded is x minutes, then the tape length is 1 (skin). ]=Vtxx×60...[1'
Vt; transcribing V. T. R. If the tape running speed (skin/second) is the master tape thickness (skin) and the slave tape thickness is (skin), then the end surface area of the two tapes is S,
(Earth) is expressed by the formula [2'. S,=t×1...'2
1 However, t = L + t2
...'3' [1), {From formula 21, S, = t×Vtxx×
60 ... [41 On the other hand, considering the state of winding around the take-up roll 16 as shown in FIG. 5, the radius r. The tape is wound from (arc) to r2 (repression).
becomes. Here, the area S2 (ground) of the end surface of the tape is expressed by formula '5'. 'S2=m(r22-r,2)
...[5' Total number of windings N' of the winding roll in the state shown in Fig. 5
It becomes the formula 6. N=Ete2 ---...{61 Here, in the state where the tape is wound, the hair pressure roller 28 in FIG.
29, or if the tape is wound without an air layer by controlling the tape tension using the air columns 7 and 12, S,=S2. Therefore, 汀(ra2-r,2)=t×Vt×××60...[
71 et 2 = tXVt odd x X60 ten. 2r22=/tX
VtkiXX600r. 2...{81'81 formula [
Substituting into formula 6' yields formula '91. In formula '9, t is the sum of the master tape thickness t and slave tape thickness t2, so it is a constant, and the tape speed Vt and take-up roll radius r are also constants, so if the transfer time x is known, the winding The total number of windings N of the winding roll can be calculated uniquely. Next, using Fig. 6 to explain specifically,
63 is a 10-key input switch, 64 is its detection circuit, 65 is a memory for sequentially storing the numbers detected by the detection circuit, and 66 is a 7-segment number displaying the contents stored in the memory 65. It is a display. Reference numeral 67 denotes a zero determination circuit composed of an AND gate circuit or the like, which determines whether the contents of the memory 65 are 0 or not. Reference numeral 68 is a running start key, the output of which is sent to a zero start determination circuit 70 consisting of a gate circuit 69 and a latch, etc.
'This will be supplied. When the start key 68 is pressed, if the zero determination circuit 67 detects zero, the zero start determination circuit 70' operates.
The abnormality display element 71 is turned on. Reference numeral 72 is a set key for resetting the zero start discrimination circuit and turning off the abnormality display element 71. As mentioned above, the signal of the start key 68 is sent to the gate circuit 6.
9. The gate circuit 69 uses the signal from the zero determination circuit 67 to pass or not pass the signal from the start key 68. If the zero determination circuit 67 is not currently detecting zero, the start signal is sent to the arithmetic processing circuit 73. At the same time as the start signal is input, the arithmetic processing circuit 73 reads data from the memory 65 and starts calculating the equation (2). When the calculation of formula '9} is completed, the calculation result is sent to the memory 74 to be stored therein, and at the same time, a running start signal is sent to the sequential control circuit 49. In response to the running start signal, the sequential control circuit 49 controls the master reel motor control circuit 11, the take-up reel motor control circuit 23, and the take-up reel motor control circuit 23 shown in FIG.
A signal is sent to the slave reel control circuit 75 to start the motor, and a signal is sent to the solenoids 48, 52, and 55 to release their respective brakes and take up the reel 16.
Start winding master tape 2 and slave tape 5. Note that when the zero determination circuit 67 detects 0, the gate circuit 69 does not allow the signal from the running start key 68 to pass through, so the calculation does not start, and the running start signal is sent from the arithmetic processing circuit 72 to the sequential control circuit 49. It is not sent to either. As the tapes 2 and 5 are wound around the take-up reel 16 as described above, the signal from the rotation detector 18 attached to the take-up reel 16 is intensified by the intensifier 22 and frequency-divided. The counter 76 generates one pulse per rotation.
Count the number of windings. The contents of the counter 76 are supplied to a size discrimination circuit 77, and are discriminated in size from the contents of the memory 74. When the contents of the counter 76 become larger than the contents of the memory 74, a stop signal is sent to the sequential control circuit 49 from the size discrimination circuit 77, and, contrary to the startup, the control circuits 11, 23, and 75 are sent to the sequential control circuit. A stop signal is sent from 49. With the above configuration, only the tape to be transferred is wound onto the take-up roll and transferred, so the transfer time efficiency is improved compared to the conventional method.
A large quantity of copy tapes can be created in the shortest possible time.
Furthermore, even in this configuration, the trailer tape is detected by the trailer detectors 42, 43 or 44, 45 shown in FIG. Of course, if this happens, the vehicle will stop running. In order to ensure reliable transcription, it is also possible to easily add several turns to the calculation result of formula (2) in advance.

[Brief explanation of drawings]

Figure 1 is a diagram showing the basic configuration of a magnetic tape transfer device using a batch winding method, Figure 2 is its electrical system diagram, Figure 3 is an explanatory diagram of its take-up reel, and Figure 4 is in the tape thickness direction. FIG. 5 is a diagram showing a tape wound on a take-up reel, and FIG. 6 is an electrical system diagram of an embodiment of the magnetic tape transfer device of the present invention. 1... Supply reel, 2... Recorded master tape, 3... Motor, 4... Supply reel, 5... Unrecorded slave tape, 6...
Motor control circuit, 11...Master reel control circuit, 16
... Winding wheel, 17 ... Motor, 18.
... Rotation detector, 19 ... Encoder disk, 20 ... Light emitting element, 21 ... Light receiving element, 23 ... Winding roll control circuit, 24 ... ... Magnetic field generator, 46 ... Roller, 47 ... Brake shoe, 48 ... Solenoid, 49 ... Sequential control circuit, 50 ... Lofu, 51 ...・・・
...Brake shoe, 52...Solenoid, 53...Low-hoo, 54...Brake shoe, 55...Solenoid, 56...Frequency divider, 63...10 key input switch , 64... detection circuit, 65...
...Memory, 67...Zero judgment circuit, 68.
...Run start key, 69...
・Gate circuit, 70...Zero start discrimination circuit,
73... Arithmetic processing circuit, 74... Memory, 75... Slave reel control circuit, 76...
．．・Counter, 77... Size discrimination circuit. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. After winding a recorded master tape and an unrecorded slave tape wound on respective supply reels onto a take-up reel with their magnetic surfaces in close contact with each other, a transfer bias magnetic field is applied. In a magnetic tape transfer device that transfers signals from a recorded master tape to an unrecorded slave tape, means for detecting the total number of windings of a take-up reel that winds both tapes, and means for setting a recording time of the master tape. , means for storing the set time, means for calculating the total number of windings on the take-up reel determined by the set time, means for storing the calculation result, and the total number of windings on the take-up reel and the A magnetic tape transfer device comprising means for stopping the tape winding operation of the take-up reel when the calculated values match. 2. The magnetic tape transfer device according to claim 1, wherein the take-up reel does not start tape winding when the set time is zero. 3. The magnetic tape according to claim 1, characterized in that tape winding by the take-up reel is started after calculation and storage of the total number of windings on the take-up reel are completed based on a set time. Tape transfer device.