JPH0215936B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a tape running control device for a tape recorder.

[Conventional technology]

Traditionally, dual-capstan type tape recorders equipped with a reel motor dedicated to driving the reel stand have problems such as unstable back tension during playback and recording operation modes if the tape loosens between the two capstans. Depending on the cause, the tape may become unstable or its running performance may deteriorate, or the tape may become entangled in the capstan and become deformed, making it unusable.

Furthermore, if excessive tape tension is suddenly applied from a stopped state during fast forwarding or rewinding operation modes, the tape may be damaged.

Therefore, when switching the operating mode, especially when switching from an operating mode in which the tape runs to stop or vice versa, it is necessary to control the rotation of the reel motor and maintain the tape tension appropriately.

And Publication No. 53-17764 (G11B15/22)
(hereinafter referred to as the first publication), by gate processing etc. based on the tape drive signal at the time of switching operation to stop,
The reel motor is braked and rotated only during the pulse generation period,
It is described that it prevents the tape from loosening.

Furthermore, in Japanese Patent Application Laid-Open No. 48-40404 (hereinafter referred to as the 2nd publication), during the switching operation to stop, the drive of the reel motor is stopped after a short delay after mechanical braking is applied, and the drive of the reel motor is stopped, especially when the tape speed is changed. It is described that the tape can be prevented from loosening due to mechanical braking during fast forwarding and rewinding.

[Problem to be solved by the invention]

The tape running control described in the first publication is effective when switching from playback or recording to stopping, but it is effective when switching from fast forwarding or rewinding to stopping, where the mechanical braking force increases depending on the tape speed. Sometimes there are problems that can have a negative impact.

Further, the tape running control described in the second publication has a problem that, contrary to the case of the first publication, it adversely affects the switching operation from playback or recording to stop.

Furthermore, no matter which control is performed in both publications, it only works when switching to stop, and when switching from stop to fast forward or rewind, the tape tension becomes excessive due to the start of tape running.

The present invention adjusts the rotational speed, direction, and stop timing of the reel motor according to switching of the operation mode by a combination of relatively simple gate processing,
It is an object of the present invention to provide a tape running control device that maintains tape tension appropriately during a switching operation to and from a stop.

[Means to solve the problem]

In order to achieve the above object, the tape running control device of the present invention has various operating modes such as playback, recording, in which the tape runs at a constant speed, fast forward, rewind, and stop, in which the tape runs at a high speed, by switching operation modes. a logic control circuit for specifying an operation mode that selectively outputs a mode signal from the output terminal of the output terminal; A reel stand brake that applies a braking force according to the operating mode before switching, the logic level of the playback and recording output terminals, the fast forwarding and rewinding output terminals before the switching operation, and the logic level of the stop output terminal. a stop switching detection means for detecting the switching from each of the constant speed running and the high speed running to a stop through gate processing; First and second time-limited circuits that generate a reverse braking pulse and a running continuation pulse when switching from high-speed running to a stop, respectively, and before and after switching operations of the playback, writing, fast-forwarding, and rewinding output terminals, respectively. travel switching detection means for detecting switching to either the constant speed travel or high speed travel operation mode based on a comparison result of logic levels; and generating a constant speed control pulse by triggering the detection output of the travel switching detection means. a third timer circuit that gates the mode signals of the playback and recording output terminals and each of the pulses, and controls the operation mode during the constant speed running mode, when a reverse control pulse is input, and when switching from stop to the high speed running mode; a constant speed gate that outputs a constant speed command signal when the constant speed control pulse is input based on the above; and a mode signal of the fast forward and rewind output terminals;
Gate processing the running continuation pulse and the constant speed control pulse, and after generation of the constant speed control pulse based on switching from stop to high speed running, during the high speed running operation mode and switching from high speed running to stop. a high-speed gate that outputs a high-speed command signal when the running continuation pulse is input based on the above; a rotational direction gate that outputs a reverse rotation command signal when the reverse braking pulse is input based on switching, during rewind mode, and when the running continuation pulse is input based on switching from rewind mode to stop; a reel motor drive control circuit that drives the reel motor according to a speed setting based on an output signal of the high speed gate and a direction setting based on an output signal of the rotation direction gate, and switching from the constant speed running operation mode to stop. The reel motor is braked and rotated during the period of the reverse braking pulse by an operation, and the reel motor is rotated at a high speed through constant speed rotation during the period of the constant speed control pulse by a switching operation from a stop to the high speed running operation mode. The reel motor continues to rotate during the duration of the running continuation pulse by switching from the high-speed running operation mode to stop.

[Effect]

In the case of the tape running control device of the present invention configured as described above, when switching from constant speed running for recording and playback to stop, the reel motor drive control is performed during the period of the reverse braking pulse of the first time circuit immediately after switching. A constant speed command signal and a reverse rotation command signal are supplied to the circuit, and the reel motor is controlled in reverse rotation to prevent tape slack.

In addition, when switching from high-speed running for fast forwarding or rewinding to stop, the high-speed command signal continues to be supplied to the reel motor drive control circuit during the running continuation pulse period of the second timed circuit immediately after switching, and the reel motor continues to rotate at the previous speed. By rotating in the same direction as the tape, an appropriate load is applied to the tape to prevent the tape from loosening.

Furthermore, when switching from stop to high-speed running such as fast forwarding or rewinding, the period of the constant speed control pulse is changed immediately after switching due to the combination of the constant speed control pulse of the third time limit circuit and the fast forwarding or rewinding mode signal. A constant speed command signal is supplied to the motor drive control circuit, and after this period has elapsed, a high speed command signal is supplied to the motor drive control circuit.

Therefore, the reel motor is controlled from stop to constant-speed running to high-speed running, thereby preventing excessive tape tension from occurring at the initial stage of startup.

Then, the drive of the reel motor is controlled via the motor drive control circuit by simple gate processing based on the mode signal of the logic control circuit and the pulses of each timer circuit.

〔Example〕

One embodiment will be described below with reference to FIGS. 1 and 2.

In Fig. 1, K1, K2...KN are operation keys, and LC is a logic control circuit for specifying the operation mode connected to each operation key K1 to KN, and stops depending on the operation of each operation key K1 to KN. ,
Output terminal ST for each operation mode such as pause, playback, recording, fast forward, rewind, and double speed fast forward or rewind (hereinafter referred to as second high speed);
Selectively outputs high-level mode signals from PA, PL, REC, FF, REW, and SL.

PD and DC are plunger drive circuits that control the operation of the plunger of the tape drive mechanism in response to mode signals from the logic control circuit LC, and a display circuit that displays the operation mode.

LA1 is a 4-bit D-type latch circuit that holds the signal before the switching operation, and the input terminals D1 to D4 are the output terminals PL, REC, FF, and REW of the logic control circuit LC for playback, recording, fast forwarding, and rewinding.
When the clock terminal CP is at low level, the signals from the input terminals D1 to D4 are output to the output terminals Q1 to Q1.
Output directly from Q4 and connect to clock input terminal CP
When the high level rises, the input terminals D1 to D4
The signal is latched until the input terminal CP returns to low level.

CO is a comparator circuit having four comparators, which compares the logic levels of the input terminals D1 to D4 of the latch circuit LA1 and the output terminals Q1 to Q4, and outputs the signal from the output terminal Q only when all four sets of comparison results match. Outputs a high level match signal.

R1 and C1 are resistance capacitors constituting a time constant circuit for latch control, and the output signal of the comparator circuit CO is delayed by a minute time required for detecting a switching operation and is supplied to the clock terminal CP of the latch circuit LA1.

OR1 is the OR gate connected to the playback and recording output terminals Q1 and Q2 of the latch circuit LA1, and OR2
is the second OR gate, OR3, connected to the fast forward and rewind output terminals Q3 and Q4 of the latch circuit LA1.
is a third OR gate for detecting a stop operation connected to the stop/pause output terminals ST and PA of the logic control circuit LC.

A1 is an AND gate connected to the output terminals of the OR gates OR1 and OR3, and outputs a high-level signal upon detecting a switching operation from constant speed running to stop during playback or recording.

A2 is an AND gate connected to OR gates OR2 and OR3, which detects a switching operation from fast forwarding or rewinding high speed running to stop and outputs a high level signal.

TM1 and TM2 are the first and second time circuits of a monostable multivibrator configuration that are triggered by the rise of the output signals of AND gates A1 and A2, respectively, and output a reverse braking pulse for period t1 and a running continuation pulse for period t2. do.

TM3 is connected to the comparison circuit CO via inverter IV1.
A third time limit circuit having a monostable multivibrator configuration is connected to the output terminal Q of the output terminal Q, and is triggered by the falling edge of the output terminal Q and outputs a constant speed control pulse for a period t3.

OR4 is the regeneration of the logic control circuit LC,
The OR gate for constant speed running detection is connected to the recording output terminals PL and REC, and OR5 is the output terminal FF for fast forwarding and rewinding of the logic control circuit LC.
This is an OR gate connected to REW for high-speed driving detection.

OR6 is a four-input OR gate, and is connected to the first and third timer circuits TM1 and TM3, the OR gate OR4, and the second high-speed output terminal SL of the logic control circuit LC.

A3 is an AND gate for constant speed command output,
The output signal of the second time limit circuit TM2 and the output signal of the OR gate OR6 are inputted via the inverter IV2, and a high-level constant speed command signal is output.

A4 is the third time circuit via inverter IV3
The AND gate to which the output signal of TM3 and the output signal of OR gate OR5 are input, OR7 is an OR gate for high-speed command output, and the second timer circuit TM2,
It is connected to AND gate A4 and outputs a high-level high-speed command signal.

R2 and C2 are resistors and capacitors that form a time constant circuit for detecting the switching operation from rewind to stop, and delay the signal of the rewind output terminal REW of the logic control circuit LC by a minute amount of time for adjustment. .

LA2 is a D-type latch circuit for detecting the switching operation from rewind to stop, and the clock terminal CP is connected to the first and second timer circuits TM1 and 2 via the OR gate OR8.
The output signal of TM2 is supplied, and while this output signal is at a low level, the signal at the input terminal D is output as is from the output terminal Q, and when the clock terminal CP rises, the signal at the input terminal D is latched until it falls.

EOR is an exclusive OR gate for rotation direction command, which is connected to the output terminal Q of the first timer circuit TM1 and latch circuit LA, and selects between a high level reverse rotation command signal and a low level forward rotation command signal. output.

MDC is a reel motor drive control circuit that controls the rotation speed and rotation direction of the reel motor M,
Constant speed and high speed input terminals SL and FA and rotation direction control input terminal D1 are connected to AND gate A3 and OR game.
Connected to OR7 and exclusive or gate EOR.

And latch circuit LA1, OR gate OR1,
OR2, OR3 and AND gates A1 and A2 form a stop switching detection means, and a latch circuit LA2, a comparator circuit CO, a resistor R1, and a capacitor C1 form a run switching detection means.

Also, OR gate OR4, OR6, inverter
IV2 and IV3 form a constant speed gate, and the OR gate
OR5, OR7, and gate A4 form a high-speed gate, latch circuit LA2, OR gate OR8,
EOR, resistor R2, and capacitor C2 form a rotation direction gate.

Furthermore, the logic control circuit LC switches between the output terminals PL,
Mode signals are output selectively from REC, FF, REW, ST, and PA, and the second mode signal of low-speed fast forward and low-speed rewind is output.
By switching to a high-speed operation mode, a mode signal is output from output terminals FF and SL during low-speed fast forwarding, and a mode signal is output from output terminals REW and SL during low-speed rewinding.

On the other hand, the drive control circuit MDC has input terminals SL and FA.
The drive voltage of the reel motor M is determined by the logic level of the reel motor M.

When the level combination of input terminals SL and FA is high level and low level, the motor drive voltage for constant speed running is output, and conversely, when the level combination is low level and high level, the motor drive voltage is greater for high speed running than when running at constant speed. When both input terminals SL and FA are at a high level, a motor drive voltage that is an intermediate voltage between constant-speed running and high-speed running, that is, a second high-speed drive is output.

Further, the polarity of the drive voltage is controlled by the logic level of the input terminal D1, and the reel motor M is rotated in the rewinding direction when the level is high, and in the fast forwarding direction when the level is low.

Next, the operation will be explained with reference to FIG.

First, FIG. 2a shows the voltage applied to a brake plunger (not shown), and when the brake plunger is not energized, it mechanically applies braking to the two reel stands on the supply side and the take-up side.

This braking is applied by the plunger drive circuit PD controlling the brake plunger according to the operating mode before the switching operation based on the mode signals of each output terminal ST, ..., SL of the logic control circuit LC, and at this time, By the operation of the brake mechanisms of both reel stands based on the brake plunger, the braking force applied to both reel stands is controlled to an appropriate amount for each reel stand depending on the operation mode.

Figure 2b shows the motor drive voltages supplied from the drive control circuit MDC to the reel motor M, and V1, V2, and V3 in the figure are the motor drive voltages during constant speed running, second high speed running, and high speed running. shows.

Then, when a key operation is performed to switch from the stopped state to fast forwarding at time T1, the mode signal output terminal of the logic control circuit LC is switched to the fast forwarding force terminal FF.

In addition, in the stopped state before the switching operation, each input and output terminal D1 to D4, Q1 of the latch circuit LA1
~Q4 both match at low level, and the comparison circuit CO
The output signal of is held at high level.

Then, according to the mode signal of the output signal FF, the latch circuit LA1 is turned on and output terminals D3 and Q3 are turned on.
The levels of the two do not match, the output signal of the comparison circuit CO is inverted to low level, and a switch to the driving operation mode is detected.

At this time, the third timer circuit TM3 is triggered by the fall of the output signal of the comparator circuit CO, and outputs a high-level constant speed control pulse for time t3.

This pulse is input to AND gate A3 via OR gate OR6, and a constant speed command signal is supplied from this AND gate A3 to input terminal SL of drive control circuit MDC.

Further, the constant speed control pulse is applied to the inverter IV3.
After being inverted, it is input to AND gate A4,
Since the AND gate A4 is turned off for the time _t3 , the high-level output signal of the OR gate OR5 based on the mode signal of the output terminal FF is not input to the OR gate OR7, and the high-speed command signal from the OR gate OR7 is not input to the drive control circuit MDC. Not supplied to input terminal FA.

Furthermore, the output signal of the latch circuit LA2 is held at a low level, and the first and second timer circuits TM
1. Since TM2 is not triggered, the output signal of exclusive OR gate EOR is held at low level.

Therefore, when switching from stop to fast forwarding, the reel motor M is rotated at a constant speed in the fast forwarding direction for _t3 hours immediately after the switching operation.

Then, after t ₃ hours have elapsed, the third time circuit TM3
When the output of becomes low level, the drive control circuit
When the input terminal SL of the MDC becomes low level, the AND gate A4 is turned on due to the low level of the output of the third timer circuit TM3.

As a result of this turning on, a high level mode signal via OR gate OR5 is input to OR gate OR7 via AND gate A4, and this OR gate
The high speed command signal from OR7 is supplied to the input terminal FA of the drive control circuit MDC, the reel motor M switches from constant speed rotation to high speed rotation, and the tape is run at high speed in normal fast forwarding.

Incidentally, even when a switching operation is performed from a stopped state to rewinding, the tape runs at a constant speed for the time t3 and then switches to high-speed running, as in the case of the above-mentioned fast forwarding operation.

In this case, the high level mode signal of the rewind output terminal REW of the logic control circuit LC is sent to the exclusive OR gate via the time constant circuit latch circuit LA2 consisting of the resistor R2 and the capacitor C2.
Since the signal is supplied to FOR, the input terminal D1 becomes high level, and the reel motor M reverses in the rewinding direction.

That is, when the tape is switched from a stopped state to fast forwarding or rewinding, the reel motor M gradually shifts from the stopped state to constant speed running and then to high speed running, so unnecessary tension is applied to the tape in the initial stage of startup. is not added, and
There is also the advantage that switching noise of the tape drive mechanism and operation noise of the reel motor M are reduced.

Next, when a switching operation to stop is performed immediately at T2 during middle operation, a mode signal is output from the output terminal ST.

At this time, since the output terminal FF is inverted to low level, the output signal of the comparison circuit CO becomes low level, the third timer circuit TM3 is triggered, and a constant speed control pulse is generated.

Further, the output signal of the comparator circuit CO is supplied to the clock input terminal CP of the latch circuit LA1 after a minute time determined by the time constants of the resistor R1 and the capacitor C1.

Then, until the clock input terminal CP rises,
The output terminal Q3 of the latch circuit LA1 is held at a high level by fast forwarding before the switching operation, and this high level is supplied to the AND gate A2 via the OR gate OR2, and this AND gate A2 is turned on.

Also, the mode signal of the output terminal ST is an OR gate.
It is supplied to AND gates A1 and A2 via OR3.

Therefore, AND gate A2 detects the switching from fast forwarding to stop, and the output signal of this AND gate A2 becomes high level.

Then, the second time limit circuit TM2 is triggered by the high level output signal of the AND gate A2, and this time limit circuit TM2 outputs a high level running continuation pulse for time t2.

This pulse is supplied to the AND gate A3 via the inverter IV2, and the AND gate A3 is kept off regardless of the constant speed control pulse.

On the other hand, the running continuation pulse is input to the input terminal FA of the drive control circuit MDC via the OR gate OR7.

Therefore, as shown in FIG. 2b, the reel motor M is rotated at an extra high speed for a time t2 from time T2.

At this time, the mechanical braking force applied to the reel stand on the supply side and the reel stand on the take-up side is usually larger on the supply side than on the take-up side.

The extra high-speed rotation causes the reel stand on the take-up side to rotate extra, and this rotation applies tension to the tape, so that the tape does not become slack.

Note that the comparison circuit CO based on the rising edge of the output terminal FF
The rise of the output signal is caused by resistor R1 and capacitor C.
A latch circuit is delayed by a minute time with a time constant circuit of 1.
It is supplied to the clock terminal CP of LA1, and the controller circuit
LA1 becomes a through state, and this latch circuit LA1
The inputs and outputs of are equal, and the output signal of OR gate OR2 returns to low level.

By the way, when switching from rewind to stop,
Exactly the same operation as described above is performed, and the tape runs an extra time in the same direction as before the stop operation for an amount of time t2 after the stop operation.

Next, when a switching operation from the stop state to playback is performed at time T3, a mode signal is output from the playback output terminal PL of the logic control circuit LC.

This mode signal is supplied to AND gate A3 via OR gates OR4 and OR6, and since AND gate A3 is on at this time, a constant speed command signal is output from AND gate A3.

Then, based on the constant speed designation signal, the reel motor M is rotated at a constant speed as shown in FIG. 2b.

This operation is exactly the same when switching to recording.

Next, if you switch to stop at T4 during playback,
The latch circuit LA1 and the comparison circuit CO operate in the same manner as in the case of switching from fast forward to stop described above.

Then, the high level output signal of the output terminal Q1 of the latch circuit LA1 before the switching operation is output from the OR gate.
It is supplied to the AND gate A1 via OR1, and the mode signal of the output terminal ST is also supplied to the AND gate A1.

Therefore, the switching from playback to stop is detected by the AND gate A1, and the output signal of the AND gate A1 becomes high level.

The high level output of the AND gate A1 triggers the first timer circuit TM1, and this timer circuit TM1 outputs a high level reverse braking pulse for time t1.

This reverse braking pulse causes the output signal of the exclusive OR gate EOR to become a high-level reverse rotation command signal.

Further, the reverse braking pulse is supplied to the AND gate A3 via the OR gate OR6, and a constant speed command signal is output from the AND gate A3.

Therefore, the drive control circuit MDC supplies the reel motor M with a motor drive voltage V1 for constant speed running in the rewinding direction for a time t1 as shown in FIG. is rotated at a constant speed.

At this time, when viewed from the reel motor M, the reel stands in the rewinding direction and the fast forwarding direction become the take-up side and the supply side, and a larger braking force is applied to the take-up reel stand than to the supply reel stand.

Then, the supply reel stand on the take-up side is rotated until the take-up reel stand completely stops. At this time, since the motor drive voltage is V1, which is relatively small, the reel motor M rotates when the braking is completely applied. The machine stops and the tape remains under tension, so the tape does not loosen.

By the way, when switching from playback to pause, and when switching from recording to stop or pause,
The operation will be similar to that described above.

When switching from recording to stop or pause, tape rewinding based on reverse braking prevents the tape from loosening and also prevents unerased data.

Next, when switching to low-speed fast-forward at T5 while stopped, the logic control circuit
LC outputs a mode signal from fast forward and second high speed output terminals FF and SL.

At this time, depending on the mode signal of the output signal FF,
The output signal of the comparison circuit CO becomes low level, and the third time limit circuit TM3 is triggered, and the AND gate A4 is turned off for a time t3, and the output of the high-speed command signal from the OR gate OR7 is blocked.

Then, the mode signal of the output terminal SL is supplied to the AND gate A3 via the OR gate OR6,
A constant speed command signal is output from this AND gate A3.

Furthermore, when t3 time elapses, AND gate A4
is turned on, and a high-speed command signal is also output from the OR gate OR7.

Therefore, as shown in Figure 2b, the tape is
After running at a constant speed for a time t3, the motor drive voltage of the drive control circuit MDC increases to V2, and the vehicle starts running at low speed and fast forward.

This operation is exactly the same even when performing a low-speed fast-forward operation, except that the latch circuit LA2 changes the rotational direction of the reel motor M to the winding direction.

Therefore, when the tape is switched from a stopped state to the second high-speed running mode, no unnecessary tension is applied to the tape, as in the case where the tape is switched to fast-forwarding or rewinding high-speed running.

Next, if a switching operation to stop is performed at T6 during low-speed fast forwarding, the operation is exactly the same as when switching from fast forwarding to stop.

At this time, for time t2 from time T6, the motor drive voltage V2 for second high-speed running is increased to the motor drive voltage V3 for high-speed running, and the tape is run at an extra high speed.

This is because sufficient torque may not be obtained if the motor drive voltage is low.

Therefore, even when switching from the second high-speed running to the stop, tension is applied to the tape due to the extra high-speed running, and the tape does not become slack.

In the above embodiment, a case has been described in which the second high-speed running function is provided, but if this function is not provided, the OR gate OR6 may be formed by a three-input OR gate.

Furthermore, the configurations of the stop switching detection means, running switching detection means, each gate, etc. are not limited to those in the embodiment.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

When switching from constant speed running for recording or playback to stop, a constant speed command signal and a reverse rotation command signal are supplied to the reel motor drive control circuit during the reverse braking pulse period of the first timed circuit immediately after switching, and the reel motor is reversely braked to prevent the tape from loosening.

In addition, when switching from high-speed running for fast forwarding or rewinding to stop, the high-speed command signal continues to be supplied to the reel motor drive control circuit during the running continuation pulse period of the second timed circuit immediately after switching, and the reel motor continues to rotate at the previous speed. By rotating in the same direction as the tape, an appropriate load is applied to the tape to prevent the tape from loosening.

Furthermore, when switching from stop to high-speed running such as fast forwarding or rewinding, the period of the constant speed control pulse is changed immediately after switching due to the combination of the constant speed control pulse of the third time limit circuit and the fast forwarding or rewinding mode signal. A constant speed command signal is supplied to the motor drive control circuit, and after this period has elapsed, a high speed command signal is supplied to the motor drive control circuit.

Therefore, the reel motor is controlled from stop to constant speed running to high speed running, thereby preventing excessive tape tension from occurring at the initial stage of startup.

Then, the drive of the reel motor is controlled via the motor drive control circuit by simple gate processing based on the mode signal of the logic control circuit and the pulses of each timer circuit.

Therefore, the combination of simple gating prevents tape slack when switching from various run states to stop, and prevents excessive tape tension when switching from stop to high speed run. Ru.

In addition, when switching from recording to stop, rewinding based on reverse braking of the reel motor prevents unerased data and enables smooth recording, etc. When switching from stop to high-speed running, the switching sound of the tape drive mechanism can be heard. There is also the effect of reducing etc.

[Brief explanation of drawings]

The drawings show one embodiment of the tape running control device of the present invention, and FIG. 1 is a wiring diagram, and FIGS. 2a and 2b are waveform diagrams of the voltage applied to the brake plunger and the motor drive voltage of the reel motor. LC...Logic control circuit, PD...Plunger drive circuit, LA1, LA2...Latch circuit, CO...Comparison circuit, TM1, TM2, TM3...
...First, second, third timer circuits, MDC...Reel motor drive control circuit, M...Reel motor, A1
~A3...and gate, OR1~OR8...or gate, EOR...exclusive or gate.

Claims (1)

[Scope of Claims] 1 Mode signals are selectively output from the output terminals of each operation mode, such as playback, recording, where the tape runs at a constant speed, fast forward, rewind, and stop, where the tape runs at high speed, by switching operation modes. and a logic control circuit for specifying the operation mode to be switched to, and a plunger control based on the mode signal to apply braking force to the two tape reel stands in accordance with the operation mode before switching when switching from the operation mode in which the tape runs to the stop mode. The constant speed running and the above are performed by applying a reel stand brake, respectively, and by gate processing the logic level before the switching operation of the playback and recording output terminals, the fast forwarding and rewinding output terminals, and the logic level of the stop output terminal. a stop switching detection means for detecting a change from high speed running to a stop, and a reverse braking pulse when switching from the constant speed running to a stop, a reverse braking pulse when switching from the constant speed running to a stop, and a reverse braking pulse when switching from the high speed running to a stop by triggering the detection output of the stop switching detection means. The constant speed running is based on the comparison result of the logic levels before and after the switching operation of the first and second timer circuits that generate running continuation pulses at the time of switching, and the playback, recording, fast forward, and rewind output terminals, respectively. , a travel switch detection means for detecting a switch to any of the high-speed travel operation modes; a third timer circuit that generates a constant speed control pulse in response to a trigger of the detection output of the travel switch detection means; The mode signal at the output terminal of the controller gates each of the pulses and determines whether the constant speed control pulse is input during the constant speed operation mode, when a reverse braking pulse is input, and when the constant speed control pulse is input based on switching from stop to high speed travel. a constant speed gate that outputs a speed command signal; a mode signal of the fast forward and rewind output terminal;
Gate processing the running continuation pulse and the constant speed control pulse, and after generation of the constant speed control pulse based on switching from stop to high speed running, during the high speed running operation mode and switching from high speed running to stop. a high-speed gate that outputs a high-speed command signal when the running continuation pulse is input based on the above; a rotational direction gate that outputs a reverse rotation command signal when the reverse braking pulse is input based on switching, during rewind mode, and when the running continuation pulse is input based on switching from rewind mode to stop; a reel motor drive control circuit that drives the reel motor according to a speed setting based on an output signal of the high speed gate and a direction setting based on an output signal of the rotation direction gate, and switching from the constant speed running operation mode to stop. The reel motor is braked and rotated during the period of the reverse braking pulse by an operation, and the reel motor is rotated at a high speed through constant speed rotation during the period of the constant speed control pulse by a switching operation from a stop to the high speed running operation mode. The tape running control device is characterized in that the reel motor continues to rotate during the period of the running continuation pulse by a switching operation from the high-speed running operation mode to a stop mode.