JPH11339344A - Tape winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform control for switching the feeding speed of a tape from high to low more in a predetermined and stable manner. SOLUTION: Control is performed in such a manner that during the high- speed winding of a tape 30 by rotary shafts 10 and 12 for rotary-driving the same by a fixed motive force, the time when the rotational speed of a tape feeding hub 26 side coincides with the switching reference value of a predetermined rotational speed is detected and, at this time, the speed of winding the tape 30 is switched from high to normal. In a control unit 16, control is executed as specified and stably by monitoring the detected rotational speed of the tape feeding hub 26 side and performing an operation for determining the coincidence of the rotational speed with the switching reference value, and thus the control of the control unit 16 is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape winding device for winding a tape supplied from one hub (reel) around another hub (reel).

[0002]

2. Description of the Related Art Conventionally, a cassette tape recorder having a tape winding device for transferring a tape wound on one hub (reel) to another hub (reel),
Video tape recorders (VTRs), data streamers, and the like are widely used. In such a tape recorder, it is desired to wind the tape at a higher speed in order to quickly perform a winding operation that is a fast-forward operation or a rewind operation. However, when the tape is wound up to the end of the tape at a high speed, a strong tension is applied to the tape at the end of the tape, and the tape may be damaged.

Therefore, in the tape winding operation, the tape is wound at a high speed near the end of the tape winding, and the tape winding speed is reduced from near the tape winding end to the completion of the winding. It is conceivable to control the tape so that the tape is not damaged by a sufficiently lowered tape tension applied at the end of the tape.

In order to perform such control for changing the tape winding speed, it is detected that the remaining amount of the tape wound on the supply hub (reel) on the side from which the tape is sent out becomes a predetermined small amount. Then, it is necessary to perform an operation of changing the tape feeding speed.

Therefore, for example, during the tape winding operation at a high speed, the rotation speed of the tape supply hub (reel) and the rotation speed of the tape winding hub (reel) are detected, and each of these rotation speeds becomes one. The time when the tape winding amount of the supply hub (reel) and the tape winding amount of the take-up hub (reel) match is set as an intermediate reference. Next, the remaining amount of the tape wound around the supply hub (reel) at the time of the intermediate reference is obtained from the tape running speed at this time, and then the supply hub (reel)
The time until the winding is completed by the winding hub (reel) is calculated from the remaining amount of the tape, and a predetermined time is subtracted from the time until the winding is completed. An arithmetic process for determining the switching time is performed.

[0006] Then, the switching time obtained by this arithmetic processing is counted, and the drive of the winding hub (reel) is controlled so as to reduce the tape feeding speed when the switching time has elapsed. Thus, it has been proposed that the tape can be wound up to the end of the tape in a state where the tape feeding speed is sufficiently reduced so that strong tape tension is not applied at the end of the tape.

[0007]

In the conventional tape winding device as described above, both the rotation speed of the supply hub (reel) and the rotation speed of the winding hub (reel) are detected by a rotation sensor. It is difficult to directly and sequentially detect the remaining amount of tape on the supply hub (reel) only by performing a process of comparing the rotation speeds of the supply hubs and detecting when the rotation speeds match each other as an intermediate reference time. .

For this reason, an arithmetic processing for determining the switching time from the intermediate reference time to the timing at which the tape feeding speed is reduced, and counting until the switching time elapses,
A complicated control of switching the tape running speed from a high speed to a low speed is required, and there is a problem that the control device becomes complicated and expensive.

In view of the above, the present invention makes it possible to directly and successively detect the remaining amount of tape in a supply hub (reel), and to simplify the control for switching the tape running speed near the end of the tape from high speed to low speed. It is an object of the present invention to newly provide an inexpensive tape winding device.

[0010]

According to a first aspect of the present invention, there is provided a tape winding device in which hubs for winding the tape around respective rotation shafts of the tape winding device are integrally rotated. While the tape is set, the rotating shaft on the side where the tape is wound on the hub is rotated with constant power, and the operation of winding the tape at a high speed is switched to the operation of winding the tape at a normal speed, and the tape is fast-forwarded. Or, when executing the control for completing the rewinding operation, the rotational speed of the tape supply hub from which the tape is pulled out is detected, and it is determined that the remaining amount of the tape wound on the tape supply hub has reached a predetermined amount. When the rotational speed detected on the supply hub side coincides with a predetermined switching reference value, the tape winding speed is controlled to be switched from high speed to normal speed. .

With the above construction, since the tape winding hub is rotated with a constant power, the point in time at which the rotation speed of the tape supply hub coincides with the switching reference value is directly detected. (2) The control for switching the tape winding speed from the high speed to the normal speed can be executed by a simple judgment method that only compares the two rotation speeds and detects the point of coincidence between the two.

According to a second aspect of the present invention, there is provided a tape winding device in a state in which hubs for winding the tape are respectively set on respective rotation shafts of the tape winding device so as to rotate integrally. While rotating the rotating shaft on the side where the tape is wound on the hub with a constant power, the operation of winding the tape at a high speed is switched to the operation of winding the tape at a normal speed, and the fast-forward or rewind operation of the tape is performed. Upon executing the control to be completed, the rotation speed of the tape winding hub that winds the tape to the hub is detected, and corresponding to each characteristic of the rotation speed that is different due to a disturbance in the operation of winding the tape, An appropriate one is selected and set from a plurality of predetermined switching reference values for judging that the tape remaining amount on the tape supply hub side has become small. value The rate for sending tapes matched point switched from the high speed to the low speed, and characterized by being configured to perform a tape fast forward or rewind complete control operation.

With the above-described configuration, the influence of disturbance in using the tape winding device is reduced, and the control of switching the tape feeding speed from high speed to low speed is more stably performed as predetermined. It is possible to do it.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tape winding device according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic configuration diagram showing a main part of a tape winding device applied to a tape recorder for a cassette tape. In FIG. 1, reference numeral 10 denotes a first rotation axis, and 12 denotes a second rotation axis. The first and second rotation shafts 10 and 12 are configured to be independently driven to rotate in the forward or reverse directions by controlling the motor 14 as a drive source by the control unit 16.

The first and second rotating shafts 10 and 12 each have a disk-shaped reflecting plate 18 as a detection target constituting a part of a rotation speed detection sensor for detecting the respective rotation speeds. The first and second rotating shafts 10 and 12 are provided integrally with the shaft cores so as to be concentric with each other and so that the surfaces of the discs are orthogonal to the respective shaft cores.

The reflecting plate 18 has its reflecting surface portion divided into four parts, and is color-coded so that adjacent portions have different brightness (in the present embodiment, white portions and black portions are alternately arranged). Colors). Since each rotation plate detection sensor is constituted in combination with each of the reflection plates 18, a light beam is irradiated to a part near the circumference of each of the reflection plates 18 so that the reflected light of this light beam can be received. 1st, 2nd
Photosensors 20 and 22 are arranged respectively. The first and second photosensors 20 and 22 receive reflected light having a relatively large amount of light reflected on a white portion of each reflecting plate 18 and reflected light having a relatively small amount of light reflected on a black portion. It is configured to convert the electric signal into an electric signal and transmit the electric signal to the control unit 16.

The control unit 16 includes a microcomputer, and controls the motor 14 based on a command signal input from an operation button (not shown) provided on the tape winding device. The motor 14 by the control unit 16
The control contents include, for example, control for switching the rotation direction of the motor 14 to forward rotation or reverse rotation, normal low rotation control for performing normal recording / reproduction with a tape recorder, and furthermore, normal fast-forwarding. Alternatively, there is a middle rotation control for performing rewinding, and a high rotation control for performing high-speed fast-forwarding or rewinding.

A generally used cassette tape 28 is mounted and used in the tape winding device configured as described above. In the cassette tape 28, a pair of first hubs (reels) 24 and second hubs (reels) 26 are rotatably supported and arranged in the cassette. In this cassette tape 28, the first hub 24
The other end of the magnetic tape 30 is fixed to one end of the magnetic tape 30 and the other end of the same magnetic tape 30 is fixed to the second hub 26 to wind the magnetic tape 30. Have been.

Further, this cassette tape 28 is
The magnetic tape 30 pulled out from the hub 24 passes through the front opening through which the magnetic head and the like of the cassette are exposed.
When the first hub 24 is driven in the normal rotation direction, it runs on a predetermined tape path sent to the side 6.
When the magnetic tape 30 sent from the second hub 26 is wound around the first hub 24 through a tape path, and the second hub 26 is driven in the reverse direction, the magnetic tape 30 sent from the first hub 24 is rotated. Is wound around the second hub 26 through a tape path.

As described above, the first rotating shaft 10 or the second rotating shaft 12 is inserted through the first hub 24 and the second hub 26 around which the magnetic tape 30 is wound, respectively, along the axial direction. Through holes are drilled. Further, although not shown, a plurality of projections are provided on an outer peripheral portion of the insertion heads of the first and second rotation shafts 10 and 12 in a radiation direction, and the first and second rotation shafts 10 and 12 are provided.
A plurality of projections for engaging with the projections of the first and second rotation shafts 10 and 12 and integrally rotating the two are formed in the inner peripheral surface portions of the insertion holes of the hubs 24 and 26 in the radiation direction. It is protruding.

The thus constructed cassette tape 28
1 shows a state in which the first rotating shaft 10 of the tape winding device is inserted and engaged with the first hub 24 and the second rotating shaft 12 is inserted and engaged with the second hub 26, as shown in FIG. Set to be used.

Next, a description will be given of control means when the tape winding device according to the present embodiment performs a fast-forward or rewind operation of the cassette tape 28. In the tape winding device, for example, the state in which the magnetic tape 30 is fully wound around the second hub 26 of the cassette tape 28 as in the start of full-length rewinding shown in FIG. The operation up to the end of the rewinding operation of fully winding the magnetic tape 30 is performed by controlling the motor 14 by the control unit 16 and rotating the first rotating shaft 10.

The motor 14 rotates the first rotation shaft 10 and starts to wind the magnetic tape 30 shown in FIG. 2 around the first hub 24 which is rotated integrally with the first rotation shaft 10 as shown in FIG. The first rotary shaft 10 and the first rotating shaft 10 are wound until the half of the magnetic tape 30 is wound around the first hub 24 and until the magnetic tape 30 is wound around the first hub 24 shown in FIG. The rotational drive capability of one hub 24 is set so that the rotational speed is substantially constant. Therefore, the first rotating shaft 1
The section D of the waveform of the first photosensor shown in FIGS. 2, 3 and 4 outputted by the first photosensor 20 for detecting the number of rotations of 0 can be treated as being constant.

As described above, when the first rotating shaft 10 and the portion of the first hub 24 on which the magnetic tape 30 is wound are rotated at a constant rotation speed, the side on which the magnetic tape 30 is sent out (tape supply side). The rotation speeds of the second rotation shaft 12 and the second hub 26 become relatively low when the remaining amount of the magnetic tape 30 wound around the second hub 26 shown in FIG. , The length of the section E1 of the waveform of the second photosensor 22 is the longest.

When the remaining amount of the magnetic tape 30 wound around the second hub 26 shown in FIG. 3 is half, the rotation speed of the second rotating shaft 12 is also increased. The length of the section E2 of the waveform of the photo sensor 22 is reduced to a medium length. Further, in a state where the remaining amount of the magnetic tape 30 wound around the second hub 26 shown in FIG. 4 is reduced to a predetermined amount, the rotation speed of the second rotation shaft 12 becomes relatively high, so that the second photo The length of the section E3 of the waveform of the sensor 22 becomes a value close to the shortest.

From the above, when the magnetic tape 30 wound around the second hub 26 is to be rewound by rotating the first hub 24 at a constant rotation speed, the magnetic tape 30 is wound around the second hub 26. It can be seen that the rotation speed of the second hub 26 increases as the remaining amount of the magnetic tape 30 decreases.

Therefore, the reference value of the section E3 when the tape remaining amount of the second hub 26 has decreased to a predetermined amount is set in advance based on an experiment, and the tape is sufficiently wound around the second hub 26. When the magnetic tape 30 is rewound to the first hub 24 side, the rewound operation is first performed at a high speed, and the waveform section of the second photosensor output from the second photosensor 20 is switched to E3 as shown in FIG. When the control unit 16 determines that the reference value has been reached, control is performed to switch the rewinding operation from high speed to normal rewinding speed. By controlling in this way, the magnetic tape 3 wound around the second hub 26
Since the portion near the zero end is rewound at a relatively low speed, it is possible to prevent a large tape tension from being generated at the end of the magnetic tape 30.

When the switching reference value in the section E3 is determined, an error in the switching operation when switching the high-speed rewinding operation to the normal rewinding operation, a margin for the control operation, and a margin for the second hub 26 are set. It is set by multiplying a required safety factor in consideration of various factors such as a time margin until the rotation speed is sufficiently decelerated. The switching reference value in this section E3 is the switching reference value NOE3 during the high-speed rewind operation.

Further, when the waveform of the switching reference value NOE3 at the time of high-speed rewinding is output from the second photo sensor 22, the tape at the time of switching which is the remaining amount of the magnetic tape 30 wound around the second hub 26 is output. The remaining amount is obtained and the second hub 26
Is output from the second photo sensor 22 at the time when the remaining amount of the magnetic tape 30 wound around the second hub 26 becomes the above-mentioned tape remaining amount at the time of the switching during the rewinding at the normal rewinding speed. A section e3 of a waveform (not shown) is obtained as a switching reference value NOe3 for normal rewinding, and can be used for control of the control unit 16.

Next, the means for correcting the switching reference value NOE3 of the tape winding device will be described. This correction means may be provided by setting the tape winding device to a difference in environmental conditions such as a temperature difference at a place of use, or by connecting the first and second hubs 24 and 26 of the cassette tape 28 mounted on the tape winding device to a large hub. In order to properly switch from the high-speed rewinding speed to the normal rewinding speed during the rewinding operation of the magnetic tape 30 in response to various factors such as a difference in diameter depending on whether or not the switching reference value NOE3 in the section E3. Is a means for correcting

The reason why the switching reference value is corrected is that, for example, when the tape winding device is used at a low temperature of minus 5 degrees Celsius, the operation of rewinding the magnetic tape 30 is delayed due to a decrease in the driving force of the motor 14. Since the output waveform of the second photosensor 22 is expanded, the section E3
Is shifted to the end of the magnetic tape 30 fixed to the second hub 26, and when this shift becomes large, the tape is rewound to the end of the magnetic tape 30 in the high-speed rewound state. This is to prevent a strong tape tension from being applied.

For this reason, in a normal use environment of the tape winding device, the first photosensor 20 at the time of high-speed rewinding in an average use state when the cassette tape 28 constituted by a hub having a general diameter is used. The average operation value in the section D of the waveform of FIG.
S. Further, at the time of high-speed rewinding when the output value of the first photosensor 20 is the average operation value DS,
Alternatively, a switching reference value corresponding to each section E3 at the time of normal rewinding is actually measured, and this is referred to as a standard switching reference value NOE3.
S, NOe3S.

Further, the first rewinding operation is performed at a high speed under the condition that the tape rewinding speed of the tape rewinding device is low.
A value in a section D of the waveform output from the photosensor 20 is actually measured, and the measured value is set as a low-speed reference value DL. Further, a switching reference value at the time of high-speed rewinding when the output value of the first photosensor 20 is DL is actually measured, and this is set as a low-speed switching reference value NOE3L.

Further, the value in the section D of the waveform output from the first photosensor 20 at the time of high-speed rewinding under the condition that the tape rewinding speed of the tape take-up device is high is measured, and the value is set to the high-speed reference. Value DH. Further, a switching reference value at the time of high-speed rewinding when the output value of the first photosensor 20 is DH is actually measured, and this is set as a high-speed switching reference value NOE3H.

As described above, correction of the reference value for switching from high speed to normal speed is controlled during control of the tape rewinding operation of the tape winding device based on the values actually measured and determined in advance.

Next, the control for rewinding the tape in the tape winding device will be described. When a tape rewind operation button (not shown) of the tape rewinding device is pressed and a tape rewind command signal is transmitted to the control unit 16, the control unit 16 determines whether to perform high-speed rewind control. . For this reason, it is detected whether or not the tape supply hub on the side from which the magnetic tape 30 of the cassette tape 28 is pulled out has a tape remaining amount equal to or more than a predetermined amount. Execute rewind control at speed. If the remaining amount of the tape is equal to or more than the predetermined amount, the process proceeds to the high-speed rewinding operation. Then, after the high-speed rewind operation is started, the detection value of the section D in the waveform sent from the first photosensor 20 is detected.

Next, when the detected value corresponding to the section D is larger than the low speed reference value DL and smaller than the high speed reference value DH, it is determined that the detected value corresponds to the average operation value DS.
3 is changed to the standard switching reference value NOE3S
Set to.

Next, the output of the second photosensor 22 is monitored during the high-speed rewind operation, and when the detected value in the section E3 matches the standard switching reference value NOE3S, the high-speed rewind speed is changed to the normal rewind speed. I do. Thereafter, the magnetic tape 30 is rewound to the end of the magnetic tape 30 at a relatively low normal rewound speed, so that a large tape tension can be prevented from being applied. Further, when rewinding to the end of the magnetic tape 30,
Since the hub to which the end of the magnetic tape 30 is fixed stops rotating, the waveforms of the first and second photosensors 20 and 22 are both linear, so that the control unit 16 detects this linear waveform. Then, it is detected that the winding of the magnetic tape 30 has been completed, and the motor 14 is stopped to complete the rewinding operation of the tape winding device.

The first and second photo sensors 20, 22
During the detection of the rectangular waveform by the first and second rotating shafts 1
The control unit 16 can detect that the motors 0 and 12 are rotating, and if the section D of the output waveform of the first photosensor 20 is a continuous and constant value, the motor 14 rotates without any trouble. And the width of the section (E1, E2, E3) of the output waveform of the second photosensor 22 is detected, and the winding of the magnetic tape 30 wound around the hub of the cassette tape 28 is detected. It is possible to detect the amount.

Next, a case where the numerical value of the switching reference value is corrected during the high-speed rewinding operation of the tape winding device will be described.

When the detected value corresponding to the section D output by the first photosensor 20 during the high-speed rewinding operation of the tape winding device is equal to or smaller than the low-speed reference value DL, it is determined that the detected value corresponds to the low-speed reference value DL. Judgment is made and the numerical value of the switching reference value in the section E3 is selected and set as the low-speed switching reference value NOE3L.

When the detected value in the section E3 of the output waveform of the second photosensor 22 matches the low speed switching reference value NOE3L, the high speed rewinding speed is changed to the normal rewinding speed, and the standard switching reference value NOE3S described above is changed. The rewinding operation is completed as in the case of (1). Since the width of the section E of the low-speed switching reference value NOE3L is set longer than the standard switching reference value, even if the high-speed rewinding tape feeding speed is relatively slow, the high-speed rewinding to the end of the tape can be performed. This prevents excessive tape tension from being applied to the magnetic tape 30.

Next, when the corresponding detected value of the section D output by the first photosensor 20 during the high speed rewinding operation of the tape winding device is equal to or higher than the high speed reference value DH, the high speed reference value DH is satisfied. Then, the value of the switching reference value in the section E3 is selected and set as the high-speed switching reference value NOE3H.

When the detected value in the section E3 of the output waveform of the second photosensor 22 matches the high-speed switching reference value NOE3H, the high-speed rewinding speed is changed to the normal rewinding speed, and the above-mentioned standard switching reference value NOE3H is changed. The rewinding operation is completed as in the case of (1). Since the width of the section E of the high-speed switching reference value NOE3H is set shorter than the standard switching reference value, the magnetic tape 30 of the cassette tape 28 is pulled out even if the tape feeding speed for high-speed rewinding is relatively high. Prevents switching from high speed to normal rewind speed when the magnetic tape 30 wound around the hub has a large remaining amount, and it takes a long time to complete the subsequent tape rewind operation. As a result, a quick rewinding operation can be performed with an appropriate short rewinding time.

In the above-described control for rewinding the tape in the tape winding device, the low-speed reference value DL and the low-speed switching reference value NOE3L, and the high-speed reference value DH and the high-speed switching reference value NOE3H are set. , These low or high speed switching reference values may be set in a plurality of stages.

For example, the low-speed reference value DL is first, DL1 when the environmental temperature is low, DL2 when the thickness of the magnetic tape 30 is thick, and DL3 when the hub diameter of the cassette tape is a large hub. The actually measured correction values are set as NOE3L1, NOE3L2, and NOE3L3 in the control unit 16 in advance, and the detection value of the first photosensor 20 during the high-speed rewind operation in the tape winding device is DL1, DL2, or DL3 is determined, and the correction value NOE3L1, NOE3L2, or NOE3L corresponding to the corresponding one is determined.
3 may be used as the low speed switching reference value. In this case, fine control is performed to perform control suitable for each condition, and the mode of the tape rewinding operation can be further stabilized.

The control at the time of tape rewinding in the tape winding device described above can be applied as it is as the control at the time of fast-forwarding of the tape, and the description of the control at the time of fast-forwarding of the tape will be omitted.

Next, an example of specific control means in the control section for tape rewinding control or tape fast-forward control in the tape winding device according to the present embodiment will be described with reference to the flowchart of FIG.

In the control unit 16 of the tape winding device, the operation button (not shown) for rewinding (REW) or fast-forwarding (FF) is pressed, and the process stands by at step 50 until a command to start FF or REW is input. I do. The control unit 16
When the F and REW start commands are received, the process proceeds to step 52, where the control unit 16 drives the motor 14 to start the operation of the FF or REW at a normal feed speed, and proceeds to step 54 to perform the operation of the second photo sensor 22. The detected value corresponding to the section D of the output waveform is read, and the routine proceeds to step 56, where it is determined whether or not the detected value is larger than a switching reference value NOe3 at the time of normal rewind which is measured and set in advance.
When the detected value is larger than NOe3, the process proceeds to the high-speed FF / REW mode in step 58, and when smaller, the process proceeds to the normal FF / REW mode in step 66.

That is, when the detected value is larger than NOe3, the magnetic tape 30 wound around the second hub 26 which corresponds to the tape supply side of the cassette tape 28 from which the magnetic tape 30 is pulled out in FIGS. It is determined that the remaining amount is larger than a predetermined amount for which it is better to perform the high-speed feeding operation.
Step 6: fast forward or rewind at high speed
Go to 0.

Step 60 is a switching reference value NOE3.
In order to perform the correction, the detection value corresponding to the section D in the output waveform of the first photosensor 20 is read and compared with the low-speed reference value DL and the high-speed reference value DH. It is determined which of the reference value DL and the high-speed reference value DH is applicable, and the next step 62
Proceed to.

In this step 62, the standard switching reference value N corresponding to the average operation value DS, the low speed reference value DL, or the high speed reference value DH determined in step 60 one by one, respectively.
OE3S, low-speed switching reference value NOE3L, or high-speed switching reference value NOE3H are selected and determined, and the routine proceeds to step 64.

In step 64, the detected value corresponding to the section (E1, E2, E3) in the output waveform of the second photosensor 22 is read and coincides with the reference value (NOE3S, NOE3L or NOE3H) determined in step 62. If the values do not match, the process returns to step 60 to return to the reference value (NOE3) for the second photosensor 22.
S, NOE3L, NOE3H)
It waits for the timing of switching from the high-speed FF / REW mode to the normal FF / REW mode.

In step 64, the second photo sensor 2
2 and the reference value (NOE determined in step 62)
3S, NOE3L, or NOE3H), the routine proceeds to step 66, in which the number of revolutions of the motor 14 is reduced to change from the high-speed FF, the REW mode to the normal FF,
Control for switching the speed to the REW mode is performed, and the routine proceeds to the next step 68.

In this step 68, the normal FF and the FF of step 66 are repeated until the output waveform of the second photosensor 22 (or the first photosensor 20) becomes linear and disappears.
When the REW mode is maintained, and when it is determined that the output waveform has disappeared, the process proceeds to step 70, and control is performed to stop the normal FF / REW mode in the tape winding device.
The control operation is completed.

[0056]

As described in detail above, according to the tape winding device of the present invention, first, hubs for winding the tape around the respective rotating shafts of the tape winding device are integrally formed. While being set to rotate, the rotary shaft on the side where the tape is wound around the hub is driven to rotate with constant power,
Switching the operation of winding the tape at high speed to the operation of winding the tape at normal speed, and detecting the rotation speed of the tape supply hub from which the tape is pulled out when executing control to complete the fast-forward or rewind operation of the tape Then, when the detected rotation speed of the supply hub coincides with a predetermined rotation speed switching reference value at which the remaining amount of tape wound on the tape supply hub is determined to be the predetermined amount, the tape is removed. Since the control for switching the winding speed from the high speed to the normal speed is performed, the time point at which the rotation speed of the tape supply hub coincides with the switching reference value is directly detected. Can be simply determined to determine the coincidence with the switching reference value. Therefore, there is an effect that the configuration of the control unit can be simplified and an inexpensive device can be provided, or the capability of the control unit can be used for other controls, because the conventional complicated control is not required.

Secondly, the number of rotations of the tape take-up hub for winding the tape, which is rotationally driven by a constant power, around the hub is detected, and the environment in which the tape take-up device is placed and the hub. For each characteristic of the rotational speed caused by the difference in the operation of winding the tape due to various conditions such as the diameter and other disturbances, the tape supply hub side has a pre-determined amount of remaining tape on the tape supply hub side. An appropriate one is selected and set from a plurality of predetermined switching reference values, and when the rotation speed on the tape supply hub side matches the switching reference value, the tape feeding speed is switched from high speed to low speed, and Since the control to complete the fast-forward or rewind operation is performed, the effect of disturbance in using the tape winding device is reduced, and the control of switching the tape feeding speed from high speed to low speed is more improved. Place There is an effect that makes it possible to perform stably the street.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a main part of a tape winding device according to an embodiment of the present invention.

FIG. 2 is a schematic explanatory diagram showing waveforms of a cassette tape and first and second photosensors in a tape rewinding start state in a tape winding device according to an embodiment of the present invention.

FIG. 3 is a schematic explanatory view showing a cassette tape in a state where the tape is wound up to an intermediate position in the tape winding device according to the embodiment of the present invention and waveforms of first and second photosensors.

FIG. 4 is a schematic explanatory view showing a cassette tape in a state where the tape has been wound up to almost the entire amount in the tape winding device according to the embodiment of the present invention, and waveforms of first and second photosensors; .

FIG. 5 is a flowchart showing a specific procedure of control for switching the tape feeding speed from high speed to low speed in the tape winding device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st rotation axis 12 2nd rotation axis 16 Control part 18 Reflector 20 First photosensor 22 Second photosensor 24 1st hub (reel) 26 2nd hub (reel) 28 Cassette tape 30 Magnetic tape

Claims (2)

[Claims] 1. A hub on which a tape is wound around each rotating shaft is set so as to rotate integrally with the rotating shaft, respectively.
A tape winding device that winds the tape by rotating the rotation shaft, wherein the rotation shaft on the tape winding hub side that winds the tape around the hub is rotationally driven with constant power. When the operation of winding the tape at a high speed is switched to an operation of winding the tape at a normal speed in the middle and the tape is fast-forwarded or rewound, the number of rotations of the tape supply hub from which the tape is pulled out. To detect that the remaining amount of tape wound around the tape supply hub has reached a predetermined amount, and a predetermined rotation reference value for switching the number of rotations, The system is configured to detect a coincident switching time while comparing with the rotation speed, and to control the tape winding speed from a high speed to a normal speed at the switching time. Winding apparatus of the tape characterized by. 2. A hub on which a tape is wound around each rotating shaft is set so as to rotate integrally with the rotating shaft, respectively.
A tape winding device that winds the tape by rotating the rotation shaft, wherein the rotation shaft on the tape winding hub side that winds the tape around the hub is rotationally driven with constant power. When the operation of winding the tape at a high speed is switched to an operation of winding the tape at a normal speed from the middle, and the tape is fast-forwarded or rewinded, the rotation number of the tape winding hub is detected. From the detected rotation speed of the tape winding hub side, determine the characteristics of the detected rotation speed that is different due to various disturbances in the operation of winding the tape, For each of the characteristics, an appropriate one is selected from a plurality of predetermined switching reference values to determine whether the remaining amount of tape in the tape supply hub has reached a predetermined amount. Setting a rotation reference value of the number of rotations, detecting the rotation speed of the tape supply hub side, and comparing the rotation reference value of the rotation speed set for the determination with the detected rotation speed of the tape supply hub side. A tape winding device, wherein a coincident switching time is detected while controlling to switch the tape from a high speed to a normal speed at the switching time.