JP3074409U - Tape drive controller - Google Patents

Abstract

(57) [Summary] [Problem] When a rewind operation is performed immediately before unloading, the rotation of the supply reel is restricted because the idler is in contact with the supply reel base, and the idler is formed on the hub. Since the ribs cannot push the ribs formed on the supply reel in the rotation direction, the incomplete sitting of the tape cassette cannot be eliminated. SOLUTION: At the time of unloading, a microcomputer 10
By rotating the capstan motor 51c to slightly rotate the clutch pulley 51d clockwise to separate the idler 51e from the supply reel base 51a, the idler 51e is formed on the supply side hub 61 when the next loading is performed. Even if the ribs B interfere with the ribs A formed on the hub support 51a1, the tape cassette can be removed by rotating the supply reel table 51a by the ribs B to eliminate the interference between the ribs A and B. Can be reliably transported to a regular position.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a tape drive control device, and more particularly, to a tape drive control device that controls a loading of a tape cassette and a running control of a magnetic tape.

[0002]

[Prior art]

 As a conventional tape drive control device, a tape drive control device disclosed in Japanese Utility Model Publication No. 1-4834 is known. This tape drive control device has a supply reel base for feeding out a video tape, a take-up reel base for winding the fed-out video tape, and a rotation direction of the reel motor based on the rotation force of the reel motor. And an idler that applies a driving force to one of the reel bases in accordance with the rolling direction. With this configuration, when the reproduction operation or the fast-forward operation is performed, the reel motor rotates in one direction to rotate the idler clockwise, so that the idler abuts on the take-up reel base to apply a driving force. On the other hand, when the rewinding operation is performed, the reel motor rotates in the reverse direction to rotate the idler in the counterclockwise direction, so that the idler comes into contact with the supply reel base to apply a driving force.

[0003]

[Problems to be solved by the invention]

 The conventional tape drive control device described above has the following problems. When the tape cassette is loaded and transported to a position where the tape can be driven, the reel base is inserted into a hub provided in the tape cassette. The hub has ribs protruding in the direction of the rotation axis.On the other hand, the supply reel table and the take-up reel table engage with the ribs of the hub during rotation to transmit driving force to the hub. On the other hand, a rib is projected in a substantially vertical direction. For this reason, there is a possibility that the rib formed on the hub and the rib formed on the reel base interfere with each other during loading, and the tape cassette cannot be arranged at a proper position. Therefore, when the ribs formed on the hub and the ribs formed on the reel base interfere with each other, the ribs formed on the reel base are pushed away in the direction of rotation of the reel base by the weight of the tape cassette, and the tape cassette is moved to the proper position. The rib formed on the reel platform has an inclined surface whose thickness in the circumferential direction gradually decreases toward the free end inserted into the hub so that it can be seated on the hub. .

[0004] However, even if an inclined surface is formed on the rib formed on the reel base, if the rewinding operation is performed immediately before unloading, the idler is in contact with the supply reel base. The rotation of the supply reel may be restricted, and the rib formed on the hub may not be able to push the rib formed on the supply reel in the rotation direction. The present invention has been made in view of the above problems, and has as its object to provide a tape drive control device capable of reliably transporting a tape cassette to a proper position during loading.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 comprises loading a tape cassette from a cassette insertion slot to a predetermined position at which a magnetic tape can be driven, and unloading the tape cassette from the predetermined position to the cassette insertion slot. A cassette loading means, a pair of reel bases capable of feeding and winding the magnetic tape, and rolling based on a predetermined rotating force in a direction corresponding to the direction of the rotating force. A tape driving means having an idler for applying a driving force to one of the corresponding reel bases; and, when the cassette loading means unloads the tape cassette, the idler is rotated in a predetermined direction to rotate the idler. Drive control means for separating the reel base from the reel base. In the invention according to claim 1, the tape driving means rolls the idler based on a predetermined rotational force while corresponding to the direction of the rotational force, and magnetically operates according to the rolling direction. Driving force is applied to either the reel base on which the tape can be fed or the reel base on which the fed magnetic tape can be wound.

When the cassette loading means unloads the tape cassette from a predetermined position where the magnetic tape can be driven to a cassette insertion slot, the drive control means rotates the idler in a predetermined direction to rotate the idler. Separate from the reel base. Then, when the cassette loading means loads the tape cassette from the cassette insertion slot to a predetermined position where the magnetic tape can be driven, the rib formed on the hub of the tape cassette and the rib formed on the reel base interfere with each other. Even so, the tape cassette can be arranged at a regular position.

That is, when the rib formed on the hub and the rib formed on the reel base interfere with each other, the reel formed on the hub can be freely rotated because the reel base can rotate freely. The rib formed on the reel base can be pushed away in the rotation direction of the reel base, and the tape cassette can be seated at a proper position. When the cassette loading means unloads the tape cassette, the drive control means only needs to rotate the idler in a predetermined direction to separate the idler from the reel base. The idler may be separated from the reel base before the loading means unloads the tape cassette, or the idler may be separated from the reel base during unloading. .

When the cassette loading means unloads the tape cassette, if the position of the idler is controlled so that the idler abuts on one of the reel bases, the reel base abuts on the reel base. However, if it is not clear which reel stand the idler is in contact with, the drive control means may be provided with an additional configuration. As a configuration example in this case, the invention according to claim 2 is the tape drive control device according to claim 1, wherein the drive control unit detects a rotation direction of the idler immediately before the unloading. Then, the idler is rotated in a direction opposite to the detected rotation direction. In the invention according to claim 2 configured as described above, the drive control unit detects a rotation direction of the idler immediately before the unloading. That is, it detects whether a playback operation or a fast-forward operation was performed immediately before the unloading, or whether a rewind operation was performed. Then, the idler is rotated in a direction opposite to the detected rotation direction. Then, even if it is unclear which reel stand the idler is in contact with, the idler can be properly separated from the reel stand in accordance with the operation status immediately before unloading. Will be useful.

Further, as an example of the timing for separating the idler from the reel base, the invention according to claim 3 is based on the tape drive control device according to claim 1 or 2. The drive control means is configured to detect the presence or absence of a take-out operation of the tape cassette, and when the take-out operation is detected, rotate the idler in a predetermined direction to separate the idler from the reel base. In the device according to claim 3 configured as described above, the drive control unit detects whether or not the tape cassette has been removed. When the removal operation is detected, the idler is rotated in a predetermined direction to separate the idler from the reel stand. Note that the take-out operation here may be a take-out operation using a remote control transmitter, a take-out operation by pressing down a take-out button arranged on an operation panel, or the like.

[0010] In order to reliably separate the idler from the reel base, an additional configuration may be provided in the drive control means. As a configuration example in this case, the invention according to claim 4 is the tape drive control device according to any one of claims 1 to 3, wherein the drive control means controls the rotation of the reel base. Confirm that the detection state continues when the accompanying reel pulse is detected, and that the non-detection state continues when the reel pulse is not detected, and the idler is separated from the reel base. It is configured to determine that In the invention according to claim 4 configured as described above, when the reel base rotates, a reel pulse is detected at a predetermined interval along with the rotation. Therefore, in the drive control means, a state where the reel pulse is detected and a state where the reel pulse is not detected alternately occur.

Therefore, it is determined whether or not the idler is separated from the reel base in accordance with the rotation state of the reel pulse. That is, when the idler is in contact with the reel base, the reel base also rotates with the rotation of the idler, so that reel pulses are detected at predetermined time intervals. On the other hand, if the idler is separated from the reel base, the reel base does not rotate. Therefore, the detection state continues when the reel pulse is detected, and the non-detection state continues when the reel pulse is not detected. . For this reason, the drive control means confirms that the detection state continues when the reel pulse is detected, and that the non-detection state continues when the reel pulse is not detected. Can be determined to be separated from the. Therefore, it is useful in that it is possible to determine whether or not to continue the rotation of the idler according to the determination result.

[0012]

[Effect of the invention]

 As described above, the present invention can provide a tape drive control device capable of reliably transporting a tape cassette to a proper position during loading. Further, according to the invention of claim 2, even when it is not clear which reel stand the idler is in contact with, the idler can be appropriately separated from the reel stand. Further, according to the present invention, the idler can be reliably separated from the reel base in accordance with the operation timing by the user. Further, according to the present invention, the idler can be reliably separated from the reel base.

[0013]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a main configuration of a video deck according to an embodiment of the present invention. As shown in FIG. 1, a microcomputer 10 having a predetermined program execution environment is provided, and a tuner 30 and a video IC 40 are connected to the microcomputer 10 via an IIC bus 20.

The tuner 30 receives a corresponding television broadcast by the antenna 30 a based on the reception frequency specified by the microcomputer 10, performs predetermined signal processing, and outputs a broadcast signal to the video IC 40. The video IC 40 generates a video signal for recording on a video tape based on the broadcast signal input from the tuner 30, and outputs the video signal from an output terminal 40a based on the video signal obtained by reproducing the video tape. To generate a video signal and an audio signal. A head mechanism 41 is connected to the video IC 40. The head mechanism 41 records and reproduces video signals on a video tape. The tape mechanism 50 connected to the microcomputer 10 is provided with a tape drive mechanism 51 and a loading mechanism 52. In response to a control instruction from the microcomputer 10, the tape drive mechanism 51 controls the video tape in a predetermined manner. At a speed, the loading mechanism 52 loads the tape cassette from the cassette insertion slot to a predetermined position where the video tape can be driven and driven, and unloads the tape cassette to the cassette insertion slot. In this sense, the loading mechanism 52 constitutes the cassette loading means according to the present invention.

FIG. 2 schematically shows a main configuration of the tape drive mechanism 51. The tape drive mechanism 51 includes a supply reel base 51a to which a supply hub of a tape cassette can be mounted, and a take-up reel base 51b to which a take-up hub of the tape cassette can be mounted. By rotating the attached supply-side hub clockwise, the video tape wound around the supply-side hub is fed, and the take-up reel base 51b rotates the attached take-up hub clockwise to supply the video tape. The video tape fed from the side hub is wound on the winding hub. In this sense, the supply reel base 51a and the take-up reel base 51b constitute a reel base according to the present invention. As a mechanism for rotationally driving the supply reel table 51a and the take-up reel table 51b, as shown in the figure, a capstan belt 51c1 is mounted between the rotation axis of the capstan motor 51c and the capstan belt 51c1. A clutch pulley 51d and a pair of idlers 51e, 51f arranged to be able to swing to the left and right in accordance with the rotation direction of the clutch pulley 51d and to transmit a driving force to the supply reel table 51a or the take-up reel table 51b are provided. Have been.

With this configuration, when the capstan motor 51c rotates in a predetermined direction based on a reproduction operation or a fast-forward operation, the clutch pulley 51d rotates clockwise via the capstan belt 51c1. As shown, the idler 51f is displaced rightward and abuts on the take-up reel base 51b, and transmits the rotating force of the clutch pulley 51d to the take-up reel base 51b. On the other hand, when the capstan motor 51c rotates in the opposite direction based on the rewinding operation, the clutch pulley 51d rotates counterclockwise via the capstan belt 51c1, and as shown in FIG. Is displaced leftward and abuts on the supply reel table 51a to transmit the rotational force of the clutch pulley 51d to the supply reel table 51a. Therefore, the clutch pulley 51d for rotating the idlers 51e and 51f while oscillating and the capstan motor 51c for rotating the clutch pulley 51d constitute tape driving means according to the present invention in this sense.

By the way, when the tape cassette is inserted into the cassette insertion slot, the loading mechanism 52 supplies the tape cassette supply side hub by loading the inserted tape cassette to a predetermined position where the tape can be driven. The take-up hub is mounted on the reel base 51a, and the take-up hub is mounted on the take-up reel base 51b. As shown in FIG. 4, the supply reel table 51a and the take-up reel table 51b have a substantially cylindrical hub support projecting in the direction of the rotation axis, that is, projecting toward the front side of the drawing. 51a1 are provided, and a plurality of ribs A are formed at equal intervals in the radial direction from the hub support 51a1. On the other hand, a plurality of ribs B are formed on the supply-side hub 61 and the take-up-side hub 62 provided in the tape cassette 60 with a ring-shaped cross section from the inner wall surface toward the rotation axis direction.

With this configuration, when the tape cassette 60 is normally loaded, the ribs A formed on the hub supports 51a1 and 51b1 and the supply-side hub 61 and the take-up side hub are provided as shown in FIG. The ribs B formed at 62 are alternately meshed with each other in the circumferential direction of the rotation shaft. For this reason, when the supply reel base 51a and the take-up reel base 51b rotate, the ribs A and B mesh with each other, and the rotational force is transmitted to the supply-side hub 61 and the take-up side hub 62, so that the video tape can run. Becomes

However, when the tape cassette 60 is loaded, for example, as shown in FIG. 5, the ribs A formed on the hub support 51 a 1 and the ribs A formed on the supply side hub 61 and the winding side hub 62 are formed. When the ribs B interfere with each other, the seating of the tape cassette 60 becomes incomplete as shown in FIG. Therefore, as shown in FIG. 7, the ribs A formed on the hub supports 51a1 and 51b1 are inclined so that the width in the circumferential direction gradually decreases toward the free ends of the hub supports 51a1 and 51b1. A surface A1 is provided.

Therefore, when the supply reel base 51a and the take-up reel base 51b are inserted into the supply-side hub 61 and the take-up side hub 62 from the free ends, as shown in FIG. Even if they interfere with each other, the rib B pushes the supply reel table 51a and the take-up reel table 51b in the rotation direction along the slope A1 due to the weight of the tape cassette, and as shown in FIG. It is guided to the fixed end side of 51b1. Therefore, the supply reel table 51a and the take-up reel table 51b rotate clockwise or counterclockwise, and displace each rib A to a position that does not interfere with the rib B as shown in FIG. In the case shown in FIG. 6, the hub support 51a1 is completely inserted into the supply-side hub 61, and the seating of the tape cassette 60 can be completed as shown in FIG.

Here, for example, when the idler 51e is in contact with the supply reel table 51a, when the ribs A and B interfere with each other, the supply reel table 51a can be freely rotated clockwise or counterclockwise. Therefore, the incomplete seating of the tape cassette 60 cannot be eliminated, and the tape cassette 60 cannot be arranged at a proper position. In the present embodiment, in order to solve such a problem, the supply reel table 51a can be freely rotated during loading. That is, the unloading of the tape cassette is executed in a state where the idler 51e is separated from the supply reel table 51a.

FIG. 11 is a flowchart showing a control procedure of the microcomputer 10 when the tape cassette is unloaded. When detecting the operation of removing the tape cassette (step S100), the microcomputer 10 displaces the idler 51e rightward so as not to contact the supply reel table 51a and the take-up reel table 51b as shown in FIG. The capstan motor 51c is slightly rotated in a predetermined direction so as to be in a neutral state (step S110). Then, the loading motor provided in the loading mechanism 52 is rotationally driven to start unloading (step S130). Therefore, the microcomputer 10 executing the above control constitutes the drive control means according to the present invention.

In the present embodiment, the unloading is started after the idler 51e is set to the neutral state. However, such a control method is merely an example, and the idler 51e is set to the neutral state during the unloading operation. Is possible as well. Further, the case where the idler 51e is in contact with the supply reel table 51a when unloading the tape cassette has been described, but the same can be applied to the case where the idler 51f is in contact with the take-up reel table 51b. It is. In this case, when detecting the operation of removing the tape cassette, the microcomputer 10 displaces the idler 51f to the left as shown in FIG. 10 so that the microcomputer 10 does not contact the supply reel table 51a or the take-up reel table 51b. Then, the capstan motor 51c is slightly rotated in a predetermined direction. Then, the loading motor provided in the loading mechanism 52 is rotationally driven to start unloading.

Further, when unloading the tape cassette, as shown in FIG. 13, whether the idler 51e is in contact with the supply reel table 51a or is in contact with the take-up reel table 51b. It is also possible to determine the rotation direction of the capstan motor 51c while taking into account the above. That is, when the microcomputer 10 detects the operation of removing the tape cassette (Step S200), the microcomputer 10 detects the operation status immediately before the operation of removing the tape cassette (Step S210). Determines that the idler 51e is in contact with the supply reel base 51a as shown in FIG. 3, and rotates the capstan motor 51c in a predetermined direction to displace the idler 51e rightward (step S220).

On the other hand, if the playback operation or the fast-forward operation is being performed immediately before the tape cassette removal operation is performed, as shown in FIG. 2, the idler 51f is in contact with the take-up reel base 51b. Is determined, and the capstan motor 51c is rotated in the opposite direction to displace the idler 51f to the left (step S230). Then, the loading motor provided in the loading mechanism 52 is rotationally driven to start unloading (step S240). Therefore, even when the idler 51e abuts on the supply reel base 51a or when the idler 51f abuts on the take-up reel base 51b, the idlers 51e and 51f are appropriately brought into the neutral state. It can be displaced.

Further, the microcomputer 10 determines whether or not the idlers 51e and 51f are in contact with the reel bases 51a and 51b, so that the idlers 51e and 51f can be reliably separated from the reel bases 51a and 51b. Become. That is, if the idlers 51e and 51f are in contact with the reel stands 51a and 51b, the reel stands 51a and 51b rotate with the rotation of the idlers 51e and 51f. Based on the detection state of the reel pulse, it can be determined whether or not the idlers 51e and 51f are in contact with the reel bases 51a and 51b. Normally, the tape mechanism 50 is provided with a reel sensor 70 for detecting the rotation speed of the supply reel table 51a and the take-up reel table 51b. As shown in FIG. A sensor LED 71 and a phototransistor 72 are provided below the bottom side of 51b. The bottoms of the reel stands 51a and 51b are radially divided into eight equal parts around the rotation axis, and four substantially fan-shaped reflectors 73 are attached to each area.

With this configuration, the sensor LED 71 irradiates light toward the bottoms of the reel bases 51 a and 51 b, and when the reflector 73 crosses the light irradiation destination, the light reflected by the reflector 73 is changed to the phototransistor 72. It is detected by. The detected reflected light is signal-converted into a reel pulse, which is output to the microcomputer 10 via the video IC. Therefore, when the reel pulse is input at a predetermined time interval, the microcomputer 10 determines that the idler 51e is in contact with the supply reel base 51a or the idler 51f is in contact with the take-up reel base 51b. And the capstan motor 51c is rotated so that the idlers 51e and 51f are separated from the reel bases 51a and 51b. On the other hand, when the detection state continues when the reel pulse is detected and the non-detection state continues when the reel pulse is not detected, the idlers 51e and 51f are separated from the reel bases 51a and 51b. And the rotation of the capstan motor 51c is stopped.

Next, an operation procedure for executing loading after unloading the tape cassette in the video deck according to the present embodiment will be described. When the user performs the operation of removing the tape cassette, the microcomputer 10 detects the removal operation and outputs a drive control signal to the tape drive mechanism 51 to slightly rotate the capstan motor 51c in a predetermined direction. Then, the tape drive mechanism 51 receiving this drive control signal drives the capstan motor 51c to rotate in a predetermined direction. Since the torque of the capstan motor 51c is transmitted to the clutch pulley 51d via the capstan belt 51c1, the clutch pulley 51d rotates clockwise to displace the idlers 51e and 51f to the right, and FIG. As shown, the idlers 51e and 51f are in a neutral state in which the idlers 51e and 51f do not contact the supply reel table 51a or the take-up reel table 51b.

Here, the microcomputer 10 outputs a drive control signal to the loading mechanism 52 to rotate the loading motor. Then, the loading mechanism 52 that has received the drive control signal drives the loading motor to rotate. For this reason, the tape cassette placed at the predetermined position is unloaded to the cassette insertion slot. When the user pushes the tape cassette again into the cassette insertion slot, for example, after exchanging the tape cassette, the microcomputer 10 that has detected the insertion of the video cassette outputs a drive control signal to the loading mechanism 52 to rotate the loading motor. I do. Then, the loading mechanism 52 that has received the drive control signal drives the loading motor to rotate. Therefore, the inserted tape cassette is loaded to a predetermined position where the tape can be driven. At this time, as shown in FIG. 4, the hub supports 51a1 and 51b1 are inserted into the supply side hub 61 and the take-up side hub 62 of the tape cassette 60, but as shown in FIGS. 5 and 8, When the ribs B formed on the supply hub 61 and the winding hub 62 interfere with the ribs A formed on the hub supports 51a1 and 51b1, the ribs B move along the inclined surface A1 due to the weight of the tape cassette. As shown in FIG. 9, the supply reel table 51a and the take-up reel table 51b are guided toward the fixed ends of the hub supports 51a1 and 51b1 while being pushed away in the rotation direction.

Accordingly, the hub supports 51a1 and 51b1 are completely inserted into the supply-side hub 61 and the take-up side hub 62, and the incomplete seating of the tape cassette 60 as shown in FIG. As shown in (1), the tape cassette 60 is disposed at a regular position where the tape can be driven. In this manner, the microcomputer 10 rotates the clutch pulley 51d slightly clockwise by rotating the capstan motor 51c at the time of unloading to separate the idler 51e from the supply reel base 51a. When the loading is performed, even if the rib B formed on the supply side hub 61 interferes with the rib A formed on the hub support 51a1, the supply reel table 51a is rotated by the rib B. By eliminating the interference between the ribs A and B, the tape cassette can be surely transported to a regular position.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a main configuration of a video deck according to an embodiment.

FIG. 2 is a schematic diagram illustrating a main configuration of a tape drive mechanism during a reproducing operation or a fast-forward operation.

FIG. 3 is a schematic diagram illustrating a main configuration of a tape driving mechanism during a rewind operation.

FIG. 4 is a cross-sectional view of the tape cassette in which a reel support is inserted into a hub.

FIG. 5 is a cross-sectional view of the tape cassette showing a situation where ribs formed on the reel support and ribs formed on the hub interfere with each other.

FIG. 6 is a side view showing a tape cassette that is not arranged at a regular position because ribs formed on a reel support and ribs formed on a hub interfere with each other.

FIG. 7 is a perspective view showing a configuration of a reel base.

FIG. 8 is a side view of the reel base showing a situation where ribs formed on the reel support and ribs formed on the hub interfere with each other.

FIG. 9 is a side view of the reel base showing a state when interference between the rib formed on the reel support and the rib formed on the hub is eliminated.

FIG. 10 is a side view showing the tape cassette disposed at a regular position in which interference between the rib formed on the reel support and the rib formed on the hub is eliminated.

FIG. 11 is a flowchart showing a control procedure of the microcomputer at the time of unloading.

FIG. 12 is a schematic diagram illustrating a main configuration of a tape driving mechanism when an idler is in a neutral state.

FIG. 13 is a flowchart illustrating a control procedure of a microcomputer according to a modification.

FIG. 14 is a perspective view illustrating a main configuration of a reel sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Microcomputer 20 ... IIC bus 30 ... Tuner 40 ... Video IC 41 ... Head mechanism 50 ... Tape mechanism 51 ... Tape drive mechanism 51a ... Supply reel stand 51a1 ... Hub support 51b ... Take-up reel stand 51b1 ... Hub support 51c ... Capstan motor 51c1 Capstan belt 51d Clutch pulley 51e, 51f Idler 52 Loading mechanism 60 Tape cassette 61 Supply hub 62 Winding hub 70 Reel sensor 71 Sensor LED 72 Phototransistor 73 Reflector A, B ... rib A1 ... inclined surface

Claims (4)

[Utility model registration claims] 1. A cassette loading means for loading a tape cassette from a cassette insertion slot to a predetermined position at which a magnetic tape can be driven, and unloading the tape cassette from the predetermined position to the cassette insertion slot. A pair of reel bases that can be fed out and wound up, and based on a predetermined rotational force, can be rolled in accordance with the direction of the rotational force, and apply a driving force to one of the reel bases according to the rolling direction. A tape drive unit including an idler; and a drive control unit configured to rotate the idler in a predetermined direction to separate the idler from the reel base when the cassette loading unit unloads the tape cassette. A tape drive control device characterized by the above-mentioned. 2. The tape drive control device according to claim 1, wherein the drive control means detects a rotation direction of the idler immediately before the unloading, and detects the idler in a direction opposite to the detected rotation direction. A tape drive control device characterized by rotating a tape drive. 3. The tape drive control device according to claim 1, wherein the drive control means detects the presence or absence of an operation for removing the tape cassette, and detects the operation for removing the tape cassette. When
A tape drive control device comprising rotating the idler in a predetermined direction to separate the idler from the reel base. 4. The tape drive control device according to claim 1, wherein the drive control means detects when a reel pulse output with rotation of the reel base is detected. A tape drive control device, characterized in that the state is continued, and when the reel pulse is not detected, it is confirmed that the non-detection state is continued, and it is determined that the idler is separated from the reel base.