JPS58161141A - Tape running driving device of magnetic transfer device - Google Patents

Abstract

PURPOSE:To stop each tape quickly, by applying sudden braking to a copy tape whose rotation inertia is large, and also executing tension-servo to a mother tape and a driving tape, whose rotation inertia is small. CONSTITUTION:A mother tape 1 and a copy tape 2 are wound so as to closely adhere to the outside circumferential of a transfer drum 3, and are made to run. The tapes 1, 2 contact against the rotating drum 3 from the outside by a driving tape 4, and by press-contact rollers 5a, 5b, the three tapes are fixed to each other and are driven for running. In case of simultaneously stopping each running tape, to copy tape reels CS, CT whose rotation inertia is large, the braking is applied, and as for mother tape reels MS, MT and driving tape reels DS, DT, whose rotation inertia is small, the braking is applied in accordance with a variation of tape tension detecting means 17, 18, 15 and 16 existing in the vicinity of these reels.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a tape running drive device for a magnetic transfer device that drives magnetic tapes by winding them in close contact with each other.
In particular, this tape is useful for use in a magnetic transfer device that transfers signals magnetically recorded on a mother tape onto a copy tape by bringing the mother tape and an unrecorded copy tape into close contact with each other on the circumferential surface of the rotating drum. This invention relates to a traveling drive device.

In recent years, with the spread of magnetic recording and reproducing devices such as video tape recorders and audio recorders, the demand for various soft tapes has increased, and master tapes (also called mother tapes) that have already been magnetically recorded have been increasing. It is necessary to make a large amount of copy tapes from.

Methods for producing such copy tapes include the so-called Tahink method, in which the signals obtained by playing the master tape are re-recorded on an unrecorded tape, and the so-called Tahink method, in which the residual magnetization pattern of the master tape is transferred to an unrecorded tape. A magnetic transfer method that performs magnetic transfer is considered.

Conventionally, the dubbing method described above has been the mainstream; for example, a signal from a master player for playing back a master tape is sent to multiple copy tape recorders for re-recording (7
ing.

However, such tabbing methods require at least a master tape player and a copy tape recorder, making the equipment expensive and causing problems with signal deterioration due to the signal playback and recording process. In particular, in the case of video tape recorders that form recording tracks diagonal to the tape running direction, mechanical variations in the rotary head device of the copy tape recorder may cause the recording tracks to be distorted. Variations occur in the pattern, causing problems such as deterioration of compatibility.

By the way, the above-mentioned magnetic transfer method has not been used much in the past due to issues such as the strength of transferred signals, but with the development of high residual magnetization tapes for masters and the development of magnetic transfer technology, it has become practical. It has reached the extent possible. According to this magnetic transfer method, copy tapes can be created using one machine, and playback and recording are not necessary.
Since a reproducing/recording head device such as a rotating magnetic head device, a reproducing/recording circuit section, etc. are not required, the configuration is extremely simplified, and there is no deterioration due to signal reproduction or recording. Furthermore, even when recording tracks are formed diagonally to the tape running direction, as in the case of a video tape I/coder, the master tape and copy tape are brought into close contact and the magnetization pattern is directly transferred. The precision of the recording tracks on the copy tape is equal to the pattern precision of the master tape, and a noft tape with no variation and high compatibility can be obtained.

Such a magnetic transfer device for creating a copy tape by magnetic transfer has at least two magnetic tapes, a master tape (mother tape) and a copy tape, that are brought into close contact with each other on the outer peripheral surface of a rotating drum that serves as a transfer drum. A tape running drive device is provided for simultaneously winding these tapes and driving them to run simultaneously. When at least two magnetic tapes are running simultaneously, if you try to stop the tape quickly, the reels will stop rotating at the same time due to differences in the rotational inertia of the reels for supplying and winding each tape. If this is not done, abnormal tension etc. will occur between each tape.

Incidentally, by applying the brakes slowly to each reel, the above abnormal tension can be prevented to some extent, but since effective magnetic transfer cannot be performed during this brake operation time, the utilization efficiency of the magnetic transfer device decreases. This is not a good idea.

For example, even though it is possible to transfer one block of BroCraf software in about a few tens of seconds using high-speed transfer, if it takes several tens of seconds for the tape to stop running, the overall transfer efficiency will be extremely low. Put it away.

In view of such conventional circumstances, the present invention has been devised to stop tape running when a plurality of tapes are running simultaneously so as to be in close contact with each other on the circumferential surface of a rotating tram by applying abnormal tension to each tape. It is an object of the present invention to provide a tape running drive device for a magnetic transfer device that can rapidly (with a fast response time) perform the tape running without causing any generation.

That is, the tape running drive device of the magnetic transfer device according to the present invention is characterized by having a mother tape on which program software is magnetically recorded in advance, and a copy tape on which program software on the mother tape is magnetically transferred. at least 2 of
In the tape running drive device of a magnetic transfer device, which performs magnetic transfer by winding the tapes of books in close contact with each other on the outer circumferential surface of a rotating drum and driving these tapes to run simultaneously, the tapes are wound near the supply reel and near the respective supply reels of each tape. 0・
A tape tension detection means is provided near each take-up reel, and when the tape stops running, the supply reel 1. Rotational braking is applied to one of the take-up reels that has a large rotational inertia, and the tape tension of the other reels is set to a constant value, which is detected by deep tension detection means disposed near each reel. The purpose of this is to control the rotation of each reel motor so that all of the upper a-pi tapes stop running at the same time.

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view schematically showing the entire tape running drive device of a magnetic transfer device. In this figure 1, the block software to be transferred is transferred to a magnetically recorded master.
The tape (master tape) 1 and the copy tape 2 are, for example, 1
They are guided and run in an overlapping and tightly wound state over an angular range of about 20'. This rotary tram 3 is configured to have extremely low rotational inertia and can rotate freely, and a dry hinoku tape 4 is used to drive the two tapes 1 and 2. ing. This trihing tape 4 contacts the tapes 1 and 2 wound around the rotating tram 3 from the outside, and the dry hinking tape 4 and the tapes 1 and 2 are applied to the outer peripheral surface of the rotating tram 3 by pressure rollers 5a and 5b. By pressing these three tapes 1
2.4, their relative positions in the tape running direction are fixed and the tapes are driven to run without slipping. This tri-hinoku table 4 itself (well, it is sandwiched between the cab squeen 6 and the pinch roller 7 and is driven to run in the direction of the arrow.
A transfer head 8 is disposed on the outer peripheral surface of the rotating drum 3, which is a transfer tram, at a position between pressure rollers 5a and 5b.

By the way, the supply for Tri Pink Tape 4.

Normally, it is sufficient for the supply reel MS and take-up reel MT for the mother tape DS, take-up reel DT, and mother tape 1- to wind a tape with a tape length corresponding to one block software. Whereas a reel with relatively small reel diameter and rotational inertia is used, the supply reel C81 and take-up reel CT for Copy Tape 2 uses multiple pieces of brochure software to save the trouble of changing tape hooks. A reel with a large diameter and large rotational inertia is often used so that long tapes that can be recorded continuously can be wound.C)
. In this case, when the magnetic transfer of one piece of program software is completed, after stopping the tape running, the transfer tram 3 is moved backward in the direction opposite to the arrow A, and the trihing tape 4 and masser tape 1 are By rewinding the copy tape 2 to return to the initial state and starting program software transfer continuously from the end position of the previous program software recording on the copy tape 2, the copy tape 2 can be automatically transferred without having to change the reel of the copy tape 2. Copy multiple copies at once.

However, each tape 1. , 2, and 4 all at once, each reel I) S to CT
It is difficult to stop the rotation at the same time due to the difference in rotational inertia of the three tapes 1, 2, .
Since the positions in the running direction of the tapes 4 and 4 are fixed to each other, there is a problem that abnormal tension is generated in the tape due to the lag in the rotation stop time.

Therefore, in the present invention, when the tape stops running, the brakes are first applied to the reels C8 and CT, which have large rotational inertia, and then the other reels DS are braked.

As for "D'!", MS, and MT, the generation of abnormal tension on the tape is prevented by controlling the brakes to be applied according to changes in the tape tension near these reels.

In the vicinity of the supply reel DS and take-up reel DT for the dry hink tape 4 in FIG.
A pair of neutral rollers 13a, 13b and 14a, 14b are provided near the force supply reel MS and take-up reel MT for the masser tape 1, respectively. and the force (l-'O rollers 1a, 11M), and 12a.

Tension arms 15 and 16 as tape tension detection means are provided between the tension arms 12b, and tension arms 15 and 16 are provided between the kite rollers 13a and 13b, and between the tension arms 14a and 1.
4b, tension arms 17 and 18 are provided, respectively. Further, a tension arm 22 is provided between a pair of kite rollers 21a, 21t near the supply reel cS of the copy tape, and a ten/contact arm 22 is provided between a pair of kite rollers 23a, 23b near the take-up reel CT.
7.24 is established.

In addition, as a tension detection means, for example, any air conditioner 7 device 30 as shown in FIG.
You may also use This Aircohum device 30 in FIG.
One side of the box body 32 is opened, the tape 31 is guided along this side, a hole 33 is bored in the side opposite to the above-mentioned - side, and air is sucked through the hole 33.
is configured such that it is introduced into the box body 32,
When the air suction force is constant, the introduced amount d of the tape 31 changes depending on the tape tension, so tape tension can be detected by detecting this introduced amount d.

By using such a tape rotation detection means, the rotation of each reel driving motor is controlled so as to keep the tape head/tone constant in the vicinity of each reel during tape running. This means, for example, that the servo circuit system as shown in FIG.
This can be done by providing T, C3, CT (D rotation drive moke M) respectively. In this servo circuit system, the tenon detection signal from the tape tenon/detection means 41 such as the tenon arm, air: 1'7 arm, etc. The signal is amplified by an amplifier '42, and compared with a reference signal which is a target value in a comparator circuit 43 to obtain an error signal.
This error signal is amplified by an amplifier 44 as necessary and sent to a selection terminal a of a changeover selection switch 45. Then, by supplying the output from this changeover selection switch 45 to the motor M via the motor drive circuit 46, the rotational speed and rotational direction of the motor are controlled, and the tape tension is kept constant. is performing an action.

A ridge source 47 for applying a reverse voltage is connected to another selection terminal C of the selection switch 45, and the other selection terminal C is grounded.

By the way, regarding the rotation control of each reel motor according to the tape tension, the 0J/1 hook direction is reversed on the supply side and the take-up side. That is, on the supply side, as the temperature increases, control is performed such that the tape tension decreases by increasing the tape rotation speed and increasing the tape supply. On the winding side, when the tape tension increases, "1!i" control is performed to lower the tape rotation speed by lowering or reversing the motor rotational speed.

Further, when the output of the supply 11111 decreases, the rotation of the supply reel motor is reduced or reversed, whereas when the tape tension on the take-up side decreases, the rotation speed of the take-up reel motor is increased.

Next, as mentioned above, the 1 recorded on mother tape 1 is
After completing the transfer of the brocrum software, each tape 1,
2. When stopping the running of 2.4, first, use the above-mentioned copy tape February glue C8, which has a large rotational inertia.
For at least one of the CT rotation one-cumulative excitation mokes,
For example, the selector switch 45 is switched to terminal 1, and a reverse voltage is applied from the power source 4I to rotate and drive in the opposite direction to that during the transfer. At this time, the drive system of copy tape reel C8 and CT is rapidly braked (
brake) is applied to reduce the tape running speed against the large rotational inertia. Here, on the circumferential surface of the rotation 1-ra I, 3, the copy tape 2, the mother tape 1, and the dry pink tape 4 are brought into close contact with each other and run simultaneously by the pressure roller 5''+5b, so that the copy tape According to the decrease in the running speed of the tapes 2, the tenon length decreases on the supply side of each tape 1, 4, and the tenon length increases on the take-up side.Therefore, each reel DS, DT, MS.

All of the MT motors are controlled to reduce the rotational speed or rotate in the opposite direction, and since the rotational inertia of these reels DS, DT, MS, and MT is small, the tape can be rotated at a relatively fast response speed. Travel stop control is performed.

As is clear from the above description, according to the tape running drive device of the magnetic transfer device according to the present invention, when the tape running is stopped, first, the motor for rotating the copy tape reels C8 and CT, which have large rotational inertia, is activated. Sudden braking (braking), for example by applying a reverse voltage to at least one side
For other reels MS, MT, DS, and DT with small rotational inertia,
Each tape 1.2.4 is Each stops rapidly without any abnormal tension occurring. Therefore, after the magnetic transfer is completed and the above-mentioned tape stop operation is performed, the transfer tonnage 3 is moved backward, the man->no-dave 1 and the tri-hink tape 4 are rewound, and after returning to the initial state, the tape is transferred again. To shorten the time of a transfer cycle in which magnetic transfer is repeated by moving the tram 3 forward (move in the direction of the arrow in FIG. 1 -\), improve transfer efficiency, and supply copy tape (soft tape) at a lower cost. Becomes power source ■ Noh.

[Brief explanation of drawings]

FIG. 1 is a front view schematically showing the entire tape running drive device of a magnetic transfer device as an embodiment of the present invention, and FIG. 2 is a diagram for explaining the principle of an air column device as a tape tension detection means. FIG. 3 is a block diagram showing an example of a surf circuit system of a motor for driving reel rotation. 1・・・・・・・・・・・・・・・Masser tape 2
・・・・・・・・・・・・・・・Copy tape 3...
・・・・・・・・・Rotating tram (transfer drum) 4...
・・・・・・・・・・・・・・・Try Pink Tape 5
a, 5b... Pressing roller 8...
・・・・・・・・・Transfer hat I) S・・・・・・
・・・・・・Dry Hinoku Tape Supply Reel DT
・・・・・・・・・・・・1-Reiching tape take-up reel λIS ・・・・・・・・・・・・Masser tape supply reel~IT・・・・・・・・・・・・・・・Mother tape take-up reel C8・・・・・・・・・・・・・・・Copy tape supply reel CT・・・・・・・・・・・・・・・
・Copy tape take-up reel 15.16, 17.18, 2
2.24 ・・・・・・・・・・・・Tennyon arm 30・
...... Air column device 31...
・・・・・・・・・・・・Tape 41・・・・・・・
...Tape sensor detection means 43 ...
...... Comparison circuit 45 ......... Changeover selection switch 46
......Motor, drive circuit M...
・・・・・・・・・・・・Reel rotation drive motor 4
7・・・・・・・・・・・・・・・Reverse voltage supply power supply patent applicant Nonny Co., Ltd. agent Patent attorney Kodo Koike 1) Sakae Mura -ichi

Claims (1)

[Claims] At least two tapes, a mother tape on which program software is magnetically recorded in advance and a copy tape on which the program software of this mother tape is magnetically transferred, are wound closely together on the outer circumferential surface of a rotating drum. In a tape running drive device of a magnetic transfer device that performs magnetic transfer while simultaneously running and driving the tape, tape tension detecting means are respectively disposed near the supply reel and the take-up reel of each of the tapes, and when the tape stops running, Out of the supply reel and take-up reel for each of the above tapes, rotational braking is applied to the one with the largest rotational inertia, and the other reels are detected by tape tension detection means disposed near each reel. A tape running drive device for a magnetic transfer device, characterized in that the rotation of each reel motor is controlled so as to stop running all of the tapes at the same time while controlling the tape tension to a constant value.