JP2547914B2 - Tape media loading device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape medium loading device for a recording / reproducing apparatus having a rotary head.

[0002]

2. Description of the Related Art In recent years, a recording / reproducing apparatus having a rotary head such as a VTR has been widely used, and a tape medium loading apparatus is required to be capable of loading a tape at high speed without damaging the tape medium.

A conventional tape medium loading device will be described below. FIG. 9 is a block diagram showing the configuration of a conventional tape medium loading device. In FIG.
The tape 2 is wound around the supply-side reel 3A and the winding-side reel 3B, and is wound around the cylinder 1 by the intermediate loading arm 14 and the loading post 13. The supply-side reel motor 4A is driven by the supply-side reel drive circuit 5A and gives a rotation torque to the supply-side reel 3A.
The reel control mechanism 12 brakes the take-up reel 3B according to the loading command b.

The loading drive gear 15 is driven by the loading motor 16 to change the mode of the mechanism (mechanical mode) and output the mode signal a at that time. The loading control circuit 17 uses the loading command b
And a mode signal a output from the loading drive gear 15
Controls the rotation of the loading motor 16.

The supply reel pulse generator 6A generates a pulse proportional to the rotation speed of the supply reel 3A. Counting circuit
21 is a pulse that is reset by the loading command b and is generated by the supply reel pulse generator 6A (reel FG)
The number e of is counted. When the mode signal a output from the loading drive gear 15 outputs the intermediate loading position, the tape winding diameter calculating circuit 22 multiplies the count value e by the first coefficient to calculate the tape winding diameter information of the supply reel 3A. The winding diameter proportional torque calculating circuit 23 multiplies the tape winding diameter information by a second coefficient to calculate the tape winding diameter proportional torque value of the supply reel 3A. The constant torque setting circuit 9 sets a constant torque value until the winding diameter proportional torque value is calculated. The switching circuit 20 switches the winding diameter proportional torque value and the constant torque value from the loading command b and the calculation status of the winding diameter proportional torque value and sends them to the supply side reel drive circuit 5A.

The operation of the tape medium loading device configured as described above will be described below with reference to the timing chart of FIG. Figure 10 shows loading command b
5 is a timing chart showing a mode signal a, a command d to the loading motor, a supply-side torque value c, a count value e, and a temporal change in tape tension at that time.

When the loading command b is issued, the reel braking mechanism 12 first brakes the take-up reel 3B so that the take-up reel 3B does not rotate during the tape loading. Then, the count value e of the counting circuit 21 is reset, and the switching circuit 20 outputs the constant torque value set by the constant torque setting circuit 9 to the supply reel drive circuit 5A. Then, the loading control circuit 17 causes the loading motor 16 to
The loading drive gear 15 is driven by giving the rotation command d to the mechanical drive mode shift. Due to the transfer of the mechanical mode, the tape 2 is pulled out from the supply side reel 3A, the supply side reel 3A rotates, and the supply reel pulse generator 6A outputs the reel FG. The transition of mechanical mode is
First, the intermediate loading arm 14 starts to move, and the tape 2 is pulled out to the intermediate loading position shown by the alternate long and short dash line in FIG.

When the mechanism moves to the intermediate loading position, the loading drive gear 15 outputs the mode signal a of the intermediate loading position. The mode signal a is input to the tape winding diameter calculation circuit 22, and the count value e at that time is multiplied by the first coefficient to calculate the tape winding diameter of the supply side reel 3A, and the winding diameter proportional torque is calculated. Input to the circuit 23. The winding diameter proportional torque calculating circuit 23 multiplies the tape winding diameter information by a second coefficient to calculate a winding diameter proportional torque value and sends it to the switching circuit 20. When the switching circuit 20 receives the winding diameter proportional torque value, it outputs it to the supply reel drive circuit 5A, and the supply reel motor 4A generates a torque proportional to the tape winding diameter of the supply reel 3A. During this time, the mechanism mode transition continues, and the mechanical mode transition from the intermediate loading position to the full loading position is performed by the loading post 13, and the tape 2 is pulled out to the position shown by the solid line in FIG. 9 to complete the loading operation. To do.

[0009]

However, in the above conventional configuration, the tape winding diameter information of the supply side reel cannot be detected unless the mechanical mode shifts to the intermediate loading position, and the motor torque corresponding to the tape winding diameter is detected. There was a problem that the control was slow and the tape was damaged in the period until then. In addition, this detection method has a problem in that the mechanism to be used is limited because it cannot be realized without a mechanism having an intermediate loading position.

Further, since the torque generated on the supply side reel is controlled by a constant torque irrespective of the fluctuation of the tape withdrawing speed during loading, the tape tension fluctuates greatly when the tape speed fluctuates during loading. However, it had a problem of damaging the tape.

Further, the same control is performed during the movement of the loading post and at the time of stop thereof. Especially, when the loading speed is made high, the tape is largely lifted from the loading post at the time of completion of loading, and the tape is largely damaged. Had a problem.

The present invention solves the above-mentioned conventional problems by detecting the tape winding diameter in a short time after the tape is drawn out in any mechanism, and realizing stable tape loading even if the tape drawing speed changes. An object of the present invention is to provide a tape medium loading device that does not damage the tape even when the loading speed is increased.

[0013]

In order to achieve this object, the tape medium loading device of the present invention has, as a first configuration, a tape pulling-out means for pulling out a tape medium stored in a cassette and a pulling-out means. A supply reel for supplying the tape, a supply reel pulse generating means for generating a pulse proportional to the number of rotations of the supply reel, a counting means for counting the supply reel pulse number, and a count value of the counting means is a first value. Measuring means for measuring the time from the predetermined value to the second predetermined value, and tape winding diameter calculating means for calculating the winding diameter of the tape wound on the supply reel from the time measured by the measuring means, And a torque control means for controlling the torque generated by the supply reel by using the winding diameter information of the supply reel output by the supply-side tape winding diameter calculation means. It is.

As a second structure, a tape pull-out means for pulling out the tape medium stored in the cassette, a supply reel for supplying the pulled-out tape, and a tape for detecting the tape winding diameter of the supply reel. Winding diameter detection means, rotation speed detecting means for detecting the rotation speed of the supply reel, target speed setting means for setting a target speed based on winding diameter information of the supply reel output by the tape winding diameter detection means, Speed error calculating means for calculating a difference between the output of the speed detecting means and the speed set by the target speed setting means,
And torque generating means for generating a torque calculated from the speed error data output by the speed error calculating means on the supply reel.

As a third structure, a tape pull-out means for pulling out a tape medium contained in a cassette, a supply reel for supplying the tape to be pulled out, and a pulse proportional to the number of revolutions of the supply reel are generated. Supply reel pulse generating means, counting means for counting the number of supply reel pulses, tape winding diameter detecting means for detecting the tape winding diameter of the supply reel, and supply reel output by the tape winding diameter detecting means. The reference count value calculating means for calculating the reference count value from the winding diameter information, the comparing means for comparing the output of the counting means with the output of the reference count value calculating means, and the supply reel of the tape winding diameter detecting means It is provided with torque control means for controlling the torque generated by the supply reel by using the winding diameter information and the output of the comparison means.

Further, as a fourth structure, a tape pull-out means for pulling out the tape medium housed in the cassette, a supply reel for supplying the tape to be pulled out,
A time measuring means for measuring the time after the tape pulling means operates, a comparing means for comparing the output of the time measuring means with a predetermined value, and a torque generated by the supply reel is variable by using the output of the comparing means. And a torque control means for controlling.

[0017]

According to the first aspect of the present invention, the tape winding diameter of the supply side reel is detected from the cycle of the reel FG immediately after the loading operation is started, so that the tape winding diameter is detected in a short time after the operation is started. In addition, the winding diameter can be detected by a mechanism that does not have an intermediate loading position.

Further, according to the second structure, by controlling the generated torque of the supply reel by using the error between the rotation speed of the supply reel and the target speed set from the tape winding diameter information of the supply reel, the tape is pulled out. It is possible to secure a stable tape tension even when the speed changes.

Further, according to the third configuration, by comparing the count number of the reel FG after the start of the loading operation with the reference count number calculated from the tape winding diameter information of the supply side reel, the loading is performed without increasing the mode signal of the mechanism. The position of the loading post inside can be detected, and the control content of the supply reel can be changed according to the position of the loading post.

According to the fourth configuration, the position of the loading post during loading can be detected without increasing the mode signal of the mechanism by measuring the time after the start of the loading operation and comparing it with the predetermined time. It is possible to change the control content of the supply-side reel according to the position of.

[0021]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a tape medium loading device according to the first embodiment of the present invention. Description of the same components in FIG. 1 as those in the conventional example of FIG. 9 is omitted.

In FIG. 1, the cycle measuring circuit 31 measures the cycle of the reel FG output by the supply reel pulse generator 6A, and the cycle adding circuit 32 adds the cycle data of the reel FG output by the cycle measuring circuit 31. Tape winding diameter calculation circuit 221
When the count value e of the counting circuit 21 reaches a predetermined value, the output of the period adding circuit 32 at that time is multiplied by a third coefficient to calculate the tape winding diameter information of the supply reel 3A.

The operation of the tape medium loading device of this embodiment thus constructed will be described below with reference to the timing chart of FIG. FIG. 2 shows a loading command b, a mode signal a, a command d to the loading motor, a supply side torque value c, a count value e, and a cycle addition value f.
3 is a timing chart showing the change over time of the tape tension at that time.

When the loading command b is generated, a constant torque is generated in the supply side reel motor 4A as in the conventional example.
The transfer of mechanical mode begins. The mechanism of this embodiment does not have the intermediate loading arm 14 of the conventional example, but the loading post 13 starts to move. The reel FG from which the tape 2 is pulled out from the supply reel 3A and output from the supply reel pulse generator 6A is input to the counting circuit 21 and the cycle measuring circuit 31 to measure its cycle,
The period is added by the period adding circuit 32. Then, the cycle addition circuit 32
The period addition tape calculated in step 221 is the tape winding diameter calculation circuit 221.
When the count value e output from the counting circuit 21 reaches a predetermined value, the tape winding diameter information is output after being multiplied by the first coefficient. Then, as in the conventional example, the supply-side reel motor 4
A continues the loading operation in the state where the torque proportional to the tape winding diameter of the supply side reel 3A is generated, and the loading operation is completed when the mode signal output from the loading drive gear indicates the full loading position.

As described above, according to the present embodiment, the cycle detecting circuit for detecting the cycle of the supply reel pulse, the cycle adding circuit for adding the cycle data, and the count value e of the counting circuit have reached a predetermined value. By providing a tape winding diameter calculating circuit for calculating the winding diameter of the tape wound on the supply reel from the output of the cycle data adding circuit at this time, the winding diameter of the supply-side reel can be reduced by a few reels FG after the start of the loading operation. Therefore, stable control using the winding diameter information is performed immediately after the start of the loading operation, and damage to the tape can be minimized.

Since it is not necessary to detect the intermediate loading position to detect the tape winding diameter, the mechanism used is not limited, and in this embodiment, the reel FG is used.
By detecting the winding diameter of the tape from the above, it is possible to easily realize the present mechanism without increasing the number of reel components to detect the winding diameter of the tape.

In addition, the configuration of this embodiment has the following second and
By combining with the third or fourth embodiment,
Further stable loading operation can be realized.

Further, in the first embodiment, the block 401 surrounded by the dotted line shown in FIG. 1 can be realized by software in a microcomputer or a digital signal processor, and the circuit can be made smaller and lighter. Space saving can be achieved.

FIG. 3 is a block diagram showing the arrangement of a tape medium loading device according to the second embodiment of the present invention. Description of the same components in FIG. 3 as those in FIGS. 1 and 9 will be omitted.

In FIG. 3, the target period calculation circuit 41 is a target of the reel FG corresponding to the tape withdrawing speed at the time of loading based on the tape pass of the mechanism and the loading speed from the tape winding diameter information output from the tape winding diameter calculating circuit 22. Calculate the period. The cycle error calculating circuit 42 calculates an error between the target cycle calculated by the target cycle calculating circuit 41 and the cycle of the reel FG measured by the cycle measuring circuit 31. Then, the control torque calculation circuit 43 changes the gain according to the positive / negative of the cycle error calculated by the cycle error calculation circuit 42, and outputs the control torque values in the winding direction and the feeding direction. And the switching circuit 202
Switches the control torque value, the winding diameter proportional torque value, and the constant torque value from the loading command b, the calculation status of the control torque calculation circuit 43, and the mode signal a, and sends them to the supply reel drive circuit 5A.

The operation of the tape medium loading device of this embodiment thus constructed will be described below with reference to the timing chart of FIG. FIG. 4 is a timing chart showing the loading command b, the mode signal a, the command d to the loading motor, the supply side torque value c, the count value e, and the temporal change of the tape tension at that time.

When the loading command b is generated, a constant torque is generated in the supply reel motor 4A as in the conventional example,
The transfer of mechanical mode begins. Intermediate loading arm 14
When the tape 2 moves to the intermediate loading position, the tape winding diameter is detected. Then, this tape winding diameter information is multiplied by the second coefficient in the winding diameter proportional torque calculation circuit 23 to calculate the winding diameter proportional torque value, and is also multiplied by the fourth coefficient in the target period calculation circuit 41 and loaded. The target cycle of the reel FG at that time is calculated. During this time, the transfer of the loading post continues, and the cycle of the reel FG generated by the supply reel pulse generator 6A is measured by the cycle measuring circuit 31, and the cycle error calculating circuit 42 calculates the error from the target cycle. To be done. Then, the error information is multiplied by the fifth coefficient when it is positive in the control torque calculation circuit 43, and is multiplied by the sixth coefficient when it is negative and sent to the switching circuit 202.

The switching circuit 202 detects that the control torque value is calculated, and switches the torque value sent to the supply side reel drive circuit 5A from the constant torque value to the control torque value. When the loading operation is continued while the control torque value is output, the loading post 13 moves to the full loading position, and the loading drive gear 15 outputs the mode signal indicating the full loading position. Upon receiving the mode signal, the switching circuit 202 sends the winding diameter proportional torque value output from the winding diameter proportional torque circuit 23 instead of the control torque value to the supply side reel drive circuit 5A to complete the loading operation.

As described above, according to this embodiment, the cycle detecting circuit for detecting the cycle of the supply reel pulse, the target cycle calculating circuit for calculating the target cycle at the time of loading from the tape winding diameter information of the supply reel, By providing a cycle error calculation circuit that calculates an error between the actually measured cycle data and the target cycle and a control torque calculation circuit that calculates a control torque value from the cycle error, stable operation is achieved even with respect to tape fluctuations in speed. The torque can be controlled, and damage to the tape during loading can be minimized.

Further, in this embodiment, by detecting the rotation speed from the reel FG, there is no need to newly add the constituent elements of the reel to detect the rotation speed of the reel, and it can be easily realized by the existing mechanism. .

Further, the configuration of the present embodiment can realize a more stable loading operation by combining with the above-mentioned first and third or fourth embodiments described below.

Further, in the second embodiment, the block 402 surrounded by a dotted line shown in FIG. 3 can be realized by software in a microcomputer or a digital signal processor, so that the circuit can be made smaller, lighter and more compact. Space can be achieved.

In the second embodiment, the tape speed is detected by the reel F generated by the supply reel pulse generator 6A.
Although G is used, a method of providing a roller in the vicinity of the supply reel 3A to detect the tape speed is also conceivable, and is not limited to the above embodiment.

FIG. 5 is a block diagram showing the arrangement of a tape medium loading device according to the third embodiment of the present invention. Description of the same components in FIG. 5 as those in FIG. 9 will be omitted.

In FIG. 5, the reference count value calculation circuit 51 is
The coefficient of 7 is divided by the tape reel diameter information calculating the reference count by entering four and rounded. The comparator circuit 52 compares the count value e of the counter circuit with the reference count value and sends the comparison result to the coefficient setting circuit 53. The coefficient setting circuit 53 outputs a coefficient corresponding to the comparison result to the winding diameter proportional torque calculation circuit 231. The winding diameter proportional torque calculating circuit 231 multiplies the coefficient output from the coefficient setting circuit 53 by the tape winding diameter information, and sends it to the switching circuit 20.

The operation of the tape medium loading device of this embodiment thus constructed will be described below with reference to the timing chart of FIG. FIG. 6 is a timing chart showing the loading command b, the mode signal a, the command d to the loading motor, the supply side torque value c, the count value e, and the temporal change of the tape tension at that time.

When the loading command b is generated, a constant torque is generated in the supply reel motor 4A as in the conventional example,
The transfer of mechanical mode begins. Intermediate loading arm 14
When the tape 2 moves to the intermediate loading position, the tape winding diameter is detected. This tape winding diameter information is input to the reference count value calculation circuit 51 and the seventh coefficient is divided and rounded off.
When loaded, the loading post 13 moves to the specified position.
The standard count value of the reel FG that occurs when the tape is wound
It is calculated according to the diameter . The transfer of the loading post continues during that time, and the supply reel pulse generator 6
The reel FG generated by A is counted by the counting circuit 21, and the count value e is compared with the reference count value by the comparison circuit 52. The count value e is smaller than the reference count value near the intermediate loading position, and the coefficient setting circuit 53 sets a small eighth coefficient in the winding diameter proportional torque calculating circuit 231, and the winding diameter proportional torque calculated there is switched. It is sent to the supply reel drive circuit 5A through the circuit 20. Further, Itaru loading post 13 to near Hazuki predetermined position to the full loading position
When it reaches, the count value e becomes larger than the reference count value, a large ninth coefficient is set in the winding diameter proportional torque calculating circuit 231, and the calculated winding diameter proportional torque is sent to the supply reel drive circuit 5A through the switching circuit 20. To be Then, the loading post 13 moves to the full loading position, and when the mode signal indicates the full loading position, the loading operation is completed.

As described above, according to this embodiment , the tape winding
The tape pull-out means is moved from the diameter information to the specified position.
Criterion for calculating the reference count value for detecting movement
A count value calculation circuit, a comparison circuit that compares the count value output from the count circuit with the reference count value, a coefficient setting circuit that sets a coefficient from the comparison result, and a winding diameter proportional torque from the coefficient and winding diameter information. By providing a winding diameter proportional torque calculating circuit for calculating , even at an intermediate position where the mode signal a does not change.
The position of the loading post can be detected and depending on that position
It is possible to change the setting of the torque of the supply side reel, and when the loading speed is high, it is possible to prevent the tape from floating from the loading post when loading is completed, and to minimize damage to the tape. it can.

In this embodiment, by detecting the position of the loading post from the reel FG, it is possible to easily realize the present mechanism without increasing the mode signal of the mechanism.

By combining the configuration of this embodiment with the first and second embodiments described above, it is possible to realize a more stable loading operation. Further, in the third embodiment, the block 403 surrounded by the dotted line shown in FIG. 5 can be realized by software in a microcomputer or a digital signal processor, so that the circuit can be made compact, lightweight and space saving. can do.

FIG. 7 is a block diagram showing the arrangement of a tape medium loading device according to the fourth embodiment of the present invention. In FIG. 7, description of the same components as those in FIG. 5 will be omitted.

In FIG. 7, the time measuring circuit 61 measures the time after the loading command b is generated. Judgment circuit
62 determines whether the time measured by the time measuring circuit 61 is larger or smaller than a predetermined value, and the result is determined by a coefficient setting circuit 63.
Send to

The operation of the tape medium loading device of this embodiment having the above structure will be described below with reference to the timing chart of FIG. FIG. 8 is a timing chart showing the loading command b, the mode signal a, the command d to the loading motor, the supply side torque value c, the count value e, and the temporal change of the tape tension at that time.

When the loading command b is generated, a constant torque is generated in the supply reel motor 4A as in the conventional example,
The transfer of mechanical mode begins. At the same time, the clock measuring circuit 61 starts measuring time. Intermediate loading arm
When the tape 2 is moved to the intermediate loading position by 14, the tape winding diameter is detected. Then, the measurement time at this time is shorter than the predetermined value, and the judgment circuit 62 sends the judgment result to the coefficient setting circuit 63. The coefficient setting circuit 63 sets a small eighth coefficient in the winding diameter proportional torque calculating circuit 231, and the winding diameter proportional torque calculated there is sent to the supply reel drive circuit 5A through the switching circuit 20. When the mechanical mode shifts and the loading post 13 approaches the full loading position, the measurement time becomes longer than a predetermined value, and a large ninth coefficient is set in the winding diameter proportional torque calculating circuit 231, and the calculated winding diameter proportional Torque is sent to the supply reel drive circuit 5A through the switching circuit 20. Then, the loading post 13 moves to the full loading position, and when the mode signal indicates the full loading position, the loading operation is completed.

As described above, according to the present embodiment, the time measuring circuit for measuring the time after the loading command is generated, the judging circuit for judging the magnitude of the measured time and the predetermined value, and the coefficient from the judgment result. By providing a coefficient setting circuit for setting and a winding diameter proportional torque calculating circuit for calculating a winding diameter proportional torque from the coefficient and winding diameter information, it is possible to change the setting of the torque of the supply reel according to the position of the loading post. When the loading speed is increased, it is possible to prevent the tape from floating from the loading post when the loading is completed, and it is possible to minimize the damage to the tape.

In this embodiment, by detecting the position of the loading post at the time after the start of the operation, the current mechanism can be easily realized without increasing the mode signal of the mechanism.

By combining the configuration of this embodiment with the first and second embodiments described above, a more stable loading operation can be realized. Further, in the fourth embodiment, the block 404 surrounded by the dotted line shown in FIG. 7 can be realized by software in a microcomputer or a digital signal processor, so that the circuit can be made compact, lightweight and space saving. can do.

Here, as a combination for realizing a more stable loading operation by combining the first to fourth embodiments, the following one can be considered. First, in FIG. 1, instead of the winding diameter proportional torque calculation circuit 23, a target cycle calculation circuit 41, a cycle error calculation calculation circuit 42, and a control torque calculation circuit 43 shown in FIG. 3 are used. When output, the torque value sent to the supply reel drive circuit 5A may be switched from the constant torque value to the control torque value, and the torque generated in the supply reel 3A may be controlled.

Further, in FIG. 3, the period addition circuit 32 shown in FIG. 1 is combined with the period measurement circuit 31, and the period addition circuit 32 is combined.
It is also possible to input the cycle addition data calculated in step 3 to the tape winding diameter calculation circuit 22 and obtain the tape winding diameter information when the output of the counting circuit 21 reaches a predetermined value. Further, also in FIG. 5, the cycle measuring circuit 31 and the cycle adding circuit 32 can be similarly combined.

Further, in FIG. 5, instead of the winding diameter proportional torque calculating circuit 231, the cycle measuring circuit 31, target cycle calculating circuit 41, cycle erroneous calculation calculating circuit 42, control torque calculating circuit of FIG.
43, when the control torque calculation circuit 43 outputs the control torque value, the torque value sent to the supply side reel drive circuit 5A is switched from the constant torque value to the control torque value, and the control torque value is set to the coefficient setting circuit 53. Alternatively, the torque generated on the supply reel 3A may be controlled by controlling the output of the above.

Further, in FIG. 5, a combination of the cycle measurement circuit 31, the target cycle calculation circuit 41, the cycle error calculation circuit 42, and the control torque calculation circuit 43 of FIG. When it is output, the torque value sent to the supply side torque drive circuit 5A is switched from the constant torque value to the control torque value, and thereafter, the output of the comparison circuit 52 outputs the winding diameter proportional torque calculation circuit 231 The torque generated on the supply reel 3A may be controlled by switching to the diameter proportional torque value.

[0057]

As described above, according to the present invention, as the first configuration, the supply reel pulse generating means for generating a pulse proportional to the rotation speed of the supply reel and the counting means for counting the supply reel pulse number. A measuring means for measuring the time until the count value of the counting means changes from the first predetermined value to the second predetermined value; and the tape wound on the supply reel from the time measured by the measuring means. By providing the tape winding diameter calculating means for calculating the winding diameter, the tape winding diameter can be detected in a short time after the start of the loading operation, and the winding diameter can be detected even by a mechanism having no intermediate loading position. It is possible to realize an excellent tape medium loading device, and its practical effect is great.

As a second structure, a tape winding diameter detecting means for detecting the winding diameter of the tape of the supply reel, a rotation speed detecting means for detecting the rotation speed of the supply reel, and the tape winding diameter detecting means. Target speed setting means for setting a target speed based on winding diameter information of the supply reel to be output, speed error calculating means for calculating a difference between the output of the speed detecting means and the speed set by the target speed setting means, By providing a torque generation means for generating a torque calculated from the speed error data output by the speed error calculation means on the supply reel, it is possible to secure a stable tape tension even when the tape withdrawal speed varies. The tape medium loading device can be realized, and its practical effect is great.

Further, as a third structure, a supply reel pulse generating means for generating a pulse proportional to the rotation speed of the supply reel, a counting means for counting the supply reel pulse number, and a tape winding diameter of the supply reel. The reference count number is calculated from the tape winding diameter detecting means for detecting the tape winding diameter and the winding diameter information of the supply reel output by the tape winding diameter detecting means.
Detecting the position of the loading post during loading without increasing the mode of the mechanism by providing the reference count value calculating means and the comparing means for comparing the output of the counting means and the output of the reference count value calculating means. It is possible to realize an excellent tape medium loading device capable of achieving the above, and its practical effect is great.

Further, as a fourth structure, by providing a time measuring means for measuring the time after the tape drawing means operates and a comparing means for comparing the output of the time measuring means with a predetermined value, the mechanism is provided. It is possible to realize an excellent tape medium loading device capable of detecting the position of the loading post during loading without increasing the number of modes, and its practical effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram of a tape medium loading device according to a first embodiment of the present invention.

FIG. 2 is a timing chart showing changes in signals of various parts of the first embodiment.

FIG. 3 is a block diagram of a tape medium loading device according to a second embodiment of the present invention.

FIG. 4 is a timing chart showing changes in signals of various parts of the second embodiment.

FIG. 5 is a block diagram of a tape medium loading device according to a third embodiment of the present invention.

FIG. 6 is a timing chart showing changes in signals of various parts of the third embodiment.

FIG. 7 is a block diagram of a tape medium loading device according to a fourth embodiment of the present invention.

FIG. 8 is a timing chart showing changes in signals of the fourth parts.

FIG. 9 is a block diagram of a conventional tape medium loading device.

FIG. 10 is a timing chart showing changes in signals at various parts of the conventional tape medium loading device.

[Explanation of symbols]

 1 Cylinder 2 Tape 3A, 3B Reel 4A Supply side reel motor 5A Supply side reel drive circuit 6A Supply reel pulse generator 9 Constant torque setting circuit 13 Loading post 14 Intermediate loading arm 15 Loading drive gear 16 Loading motor 17 Loading control circuit 20,202 Switching Circuit 21 Counting circuit 22,221 Tape winding diameter calculation circuit 23,231 Rolling diameter proportional torque calculation circuit 31 Cycle measurement circuit 32 Cycle addition circuit 41 Target cycle calculation circuit 42 Cycle error calculation circuit 43 Control torque calculation circuit 51 Reference count value calculation circuit 52 Comparison circuit 53 Coefficient setting circuit 61 Time measurement circuit 62 Judgment circuit 63 Coefficient setting circuit

Claims (5)

(57) [Claims] 1. A tape pull-out means for pulling out a tape medium contained in a cassette, a supply reel for supplying the tape to be pulled out, and a supply reel pulse generation means for generating a pulse proportional to the rotation speed of the supply reel. When the tape from the counting means for counting the number of supply reel pulse, a tape winding diameter detecting means for detecting a tape winding diameter of the supply reel, reel diameter information of the supply reel outputted by the tape winding diameter detecting means The pull-out means pulls a certain amount of tape
A reference count value calculating means for calculating a reference count number for detecting that the tape has moved to a predetermined position, a comparing means for comparing the output of the counting means with the output of the reference count value calculating means, and the tape winding. A tape medium loading device comprising: winding diameter information of the supply reel output by the diameter detecting means; and torque control means for controlling the torque generated by the supply reel using the output of the comparing means. 2. The tape winding diameter detecting means comprises: a measuring means for measuring the time taken for the count value of the counting means to change from a first predetermined value to a second predetermined value; and the supply from the time measured by the counting means. The tape medium loading device according to claim 1, further comprising: a tape winding diameter calculating unit that calculates a winding diameter of the tape wound on the reel. 3. The torque control means sets a target cycle based on cycle measuring means for measuring the cycle of the pulse generated by the supply reel pulse generating means, and winding diameter information of the supply reel output by the tape winding diameter detecting means. Target cycle setting means, cycle error calculating means for calculating the difference between the output of the cycle measuring means and the cycle set by the target cycle setting means, cycle error data output by the cycle error calculating means and the comparing means. 2. The tape medium loading device according to claim 1, further comprising a torque generating unit that generates a torque calculated from the output on the supply reel. 4. The torque control means sets a target cycle based on cycle measuring means for measuring the cycle of pulses generated by the supply reel pulse generating means, and winding diameter information of the supply reel output by the tape winding diameter detecting means. Target cycle setting means, a cycle error calculating means for calculating the difference between the output of the cycle measuring means and the cycle set by the target cycle setting means, and a torque calculated from the cycle error data output by the cycle error calculating means. The first torque generating means for the supply reel, the second torque generating means for generating a torque proportional to the winding diameter information of the supply reel output by the tape winding diameter detecting means on the supply reel, and the output of the comparing means. 2. The tape medium loading device according to claim 1, further comprising a torque switching unit that switches between the first torque generating unit and the second torque generating unit. 5. The tape winding diameter detecting means includes a measuring means for measuring a time required for the count value of the counting means to change from a first predetermined value to a second predetermined value, and the time measured by the measuring means. The tape medium loading device according to claim 1, further comprising a tape winding diameter calculating unit that calculates a winding diameter of the tape wound around the supply reel.