JPH01294263A - Autoloading method for magnetic tape device - Google Patents

Abstract

PURPOSE:To prevent a magnetic tape from bending at the time of slack of the magnetic tape by putting the magnetic tape in a vacuum column to wind up it after winding the magnetic tape fed out from a cartridge around a machine reel of a magnetic tape device. CONSTITUTION:A magnetic tape 10 in a cartridge 20 is fed out and is wound around a machine reel 33 of the magnetic tape device, and the winding-up operation of the wound magnetic tape is stopped, and the magnetic tape 10 is put in vacuum columns 45 and 46 of the magnetic tape device. The magnetic tape 10 is wound up around the machine reel 33 again in this state, and feeding- out of the magnetic tape is stopped after a certain extent of winding-up and the magnetic tape is put in vacuum columns 45 and 46. Then, the front end of the tape (BOT) indicating the first position of information write on the magnetic tape is searched. Thus, a high tension is prevented from being applied to the magnetic tape, and bending of the magnetic tape is prevented when the magnetic tape is loosely wound.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an autoloading method for a magnetic tape device, and particularly to an autoloading method for a magnetic tape device that automatically loads a magnetic tape specified by JIS C6242 into the magnetic tape device. Concerning loading method.

[Prior Art] Conventionally, in autoloading of this type of magnetic tape device, as shown in Figure 6, a reel-to-reel type magnetic tape is stored in a cartridge in order to make the magnetic tape easy to handle and to enable autoloading. When this is attached to a magnetic tape device and operation is started, air is supplied to the cartridge to autoload the magnetic tape, initial settings are made to open the cartridge (STI), and then the magnetic tape is pulled out from the cartridge. ),
Further, the tape was wound onto a machine reel of a magnetic tape device (Sr1).

The air supply to the cartridge is stopped, and negative pressure air is supplied to the vacuum column of the magnetic tape device to perform column-in to insert the magnetic tape (Sr1). o4
BOT search (Sr
I was trying to do 1).

[Problems to be Solved by the Invention] By the way, the magnetic tape with a cartridge used in the above-mentioned magnetic tape device that automatically loads the magnetic tape automatically loads the magnetic tape in such a way that the leading edge of the magnetic tape stored in the cartridge is not fixed. Because of this, vibrations applied during handling may cause the winding to loosen.

When autoloading is performed using the conventional procedure with this loose winding, as shown in Figures 5 (a) to (C), after the magnetic tape sticks to the machine reel (
vk) Tape feeding and winding vk) Since a large force is applied to the loosely wound magnetic tape when it enters the vacuum column, there is a drawback that the inner layer of the magnetic tape is crushed by the outer layer, causing the magnetic tape to fold. If this magnetic tape bend is located further back than BOT, which is the recording start position, it will prevent the contact between the magnetic head and the magnetic tape, resulting in the problem that the data already recorded on the magnetic tape cannot be reproduced. arise.

[Means for Solving the Problem] In the present invention, a means for solving the above problems is an autoloading mechanism for a magnetic tape device having an autoloading mechanism for automatically loading a magnetic tape with a cartridge into the magnetic tape device. Pull out the magnetic tape from the cartridge, make sure that the leading edge of the magnetic tape is sufficiently wrapped around the machine reel of the magnetic tape device, then put the magnetic tape into the vacuum column of the magnetic tape device and wrap it onto the thin reel with a weak tension. It is configured so that it can be rolled up.

[Example] The following embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart showing an autoloading method for a magnetic tape device according to an embodiment of the present invention. First, initial settings are made to start the autoloading operation (STII), the magnetic tape in the cartridge is ejected (ST12), and the ejected magnetic tape is wound around the machine reel of the magnetic tape device (ST13).
The winding operation of the wound magnetic tape is stopped, and column-in is performed to put the magnetic tape into the vacuum column of the magnetic tape device (ST14).

Next, the 81 air tape is wound onto the machine reel again while still in the vacuum column (STI 5), and after a certain amount of winding is completed, the magnetic tape is stopped and the magnetic tape is put into the vacuum column again. do it (
ST16), and a BOT search (ST17) that detects the BOT that indicates the first position to start writing information on the magnetic tape.
).

Next, regarding the operation of the present invention, FIG. 2 shows a general mechanism of a magnetic tape device, FIG. 3 shows electrical connections for controlling the flowchart in FIG. 1, and FIG. Figure 4 (a) (b) (showing the movement)
Explain using c) (d) (e) (f) (g) (h).

When the magnetic tape IO wound around the cartridge 20 is attached to the file motor 30 of the magnetic tape device and autoloading is started, the CPU 80 that controls the operation of the magnetic tape device is started and the program input stored in the memory 81 is started. Vacuum pump 40 and pressure pump 50 are operated via output boat 82. The output of the vacuum pump 40 becomes a negative pressure from atmospheric pressure and is applied to the machine reel 33 through the vacuum switching valve 41. Further, the output of the pressure pump 50 is set to a positive pressure rather than the atmospheric pressure, and is applied to the cartridge guide 52 and the air guide 53 through the pressure switching valve 51. The initial setting is 0 or more (STI 1).

Next, the cartridge motor 31 rotates and the magnetic tape 10 is
The cartridge 20 to which the reel was fixed is released, and the sole of the magnetic tape 10 becomes free, and the air hole of the cartridge guide 52 and the air hole of the cartridge 20 come into contact with each other, and air is sent into the cartridge 20. The air sent into the cartridge 20 is
Air blows out from a plurality of directional holes, and the leading edge A of the magnetic tape 10 floats up from the wound layer B as shown in FIG. 4(a).

From this state, the file motor 30 is rotated counterclockwise (left rotation) for several seconds, and as soon as it stops, it is then rotated clockwise (clockwise rotation). At this time, the leading edge A of the magnetic tape 10 rises above the wound layer B, passes through the inner wall of the cartridge 20, and comes out from the outlet 21 of the cartridge 20, as shown in No. 41N(b). As a result, the tape (exit 5T12) is executed.

Next, the machine motor 32 is rotated clockwise (clockwise), and the tip A of the ejected magnetic tape 10 is
As shown in Figure (C), the air is carried along the flow of air blown out from the right air guide 54 in the direction of arrow C, and further along the flow of air blown out from the left air guide 55 in the direction of arrow C. carried.

At this time, the CPU 80 connects the BOT via the input/output boat 82.
/ Check whether the magnetic tape 10 is passing under the EOT sensor 60. If it is not passing, stop the clockwise rotation of the file motor 30, rotate it counterclockwise to rewind it, and set the retry number in the memory 81. Tape again.
When the magnetic tape 10 correctly passes under the BOT/EOT sensor 60 that performs the ejecting means 12, the leading edge A of the magnetic tape 10 is moved by the machine motor 3 as shown in FIG. 4d.
Near the machine reel 33 connected to the machine reel 33, there is a small slit or numerous holes in the shaft E of the machine reel 33, and negative pressure is applied from the vacuum pump 40, so the tip A of the magnetic tape IO is attracted. machine reel 3
3, thereby wrapping the tape (ST13)
ends.

Furthermore, after the magnetic tape 10 wound around the machine reel 33 has been wound in several layers, the machine motor 32 stops. Further, the vacuum switching valve 41 is operated by the vacuum pump 40, and negative pressure is applied to the pressure regulating valve 42 side. Pressure regulating valve 42 supplies negative pressure to pressure sensor 43 and right vacuum column 45. At this time, since the file motor is rotating clockwise, the magnetic tape IO enters the right vacuum column 45 by the force F drawn by the negative pressure, as shown in FIG. 4(e). This completes the column-in (ST14).

Column sensors RU61 and RL62 are installed on the right vacuum column 45.
is provided, and the magnetic tape 10 is connected to the column sensor RU.
61 and further crosses column sensor RL62, the machine motor 32 is rotated clockwise. If the magnetic tape IO has not crossed the column sensor RU61, the machine motor 32 is stopped and the tape is re-wound (ST15) as shown in FIG. 4(f). The pressure is detected by a pressure sensor 43 and fed back to the pressure regulating valve 42 to maintain a predetermined very low pressure.

After sufficient rewinding (ST15), the file motor 30 is stopped, the magnetic tape in the right vacuum column 45 is wound up by the machine motor 32, and the zero-order vacuum stops with the tape stretched. By switching the switching valve 41, negative pressure is supplied to the capstan 34, left vacuum column 46, and right vacuum column 45.Next, the machine motor 32 is driven to the left and the file motor is driven to the right. As shown in Figure 4 (g), it is drawn by negative pressure and enters the left and right vacuum columns 45 and 46.

At this time, when the magnetic tape IO crosses the column sensor RU61 of the right vacuum column 45 but does not cross the column sensor RL82, the right rotation of the file motor 30 is stopped. Similarly, when the magnetic tape 10 crosses the column sensor LU63 of the left vacuum column 46 but does not cross the column sensor LL64, the left rotation of the machine motor 33 is stopped. At this time, the magnetic tape 10 is given a constant tension by the negative pressure of the left and right vacuum columns 45, 46, as shown in FIG. 4(h), and can maintain safe contact with the magnetic heald 7. This completes the re-column-in (ST16).

Next, in the BOT search (ST17), since negative pressure is applied to the capstan 34, the magnetic tape IO is wound around the capstan 34 and can be moved according to the rotation of the capstan motor 35. The BOT search means 16 differs depending on the amount of magnetic tape 10 wound around the machine reel 33.

This means that the BOT position of the magnetic tape 10 is approximately 4.
This is because the BOT is wound on the machine reel 33 if the winding amount of the machine reel 33 is large since the position is determined to be 6 m. This is also because if the appropriate amount of winding is performed, the BOT position will be within the right vacuum column 45.

Here, if the BOT position is in the right vacuum column, the capstan motor 35 is rotated to the left. Capsta motor 3
Magnetic tape 1 in right vacuum column 45 by left rotation of 5
0 goes up and inside the left vacuum column 46 goes down. When the position of the magnetic tape 10 is above the column sensor RU61, the file motor 30 is rotated clockwise. Moreover, when it falls below the column sensor LL64, the machine motor 33 is rotated clockwise. In this manner, the clockwise rotation of the capstan motor 35 is stopped when the BOT sensor 60 detects a reflective marker (BOT marker) attached to the back surface of the magnetic tape 10 following the rotation of the capstan motor 35. This completes the autoloading according to the embodiment of the present invention.

In the description of the embodiment, it was explained that the magnetic tape 10 was placed in the right vacuum column 45, but the left and right vacuum columns 45.
The present invention can be implemented in the same manner even if a magnetic tape 10 is inserted into 46.

[Effects of the Invention] As explained above, the present invention provides an automatic loading mechanism for automatically loading a magnetic tape with a cartridge, in which the magnetic tape is unloaded after the magnetic tape ejected from the cartridge is wound around the machine reel of the magnetic tape device. Column-in winding, in which the magnetic tape is wound in a vacuum column, prevents large tension from being applied to the magnetic tape and prevents bending of the magnetic tape when the tape is loosely wound.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing an embodiment of an autoloading method for a magnetic tape device of the present invention, FIG. 2 is a diagram showing an outline of a magnetic tape device to which the embodiment shown in FIG. 1 is applied, and FIG. A block diagram showing an electric circuit that controls the flowchart in FIG. 1; FIGS. 4(a) to (h) are explanatory diagrams showing the movement of the magnetic tape in the flowchart in FIG. 1;
5(a) to 5(C) are diagrams showing the state in which the magnetic tape bends due to loosening of the winding. FIG. 5(a) is a front view showing the entire magnetic tape, and FIG. Diagram (a)
No.b part, and Fig. 5(C) is Fig. 5(kl)(7)c
FIG. 6 is a flowchart showing the autoloading operation of a conventional magnetic tape device. 10: Magnetic tape 20: Cartridge 30: File motor 32: Machine motor 33: Machine reel 40: Vacuum pump 45.46: Vacuum column 50: Pressure pump 61-64: Column sensor

Claims (1)

[Claims] An autoloading method for a magnetic tape device having an autoloading mechanism for automatically loading a magnetic tape with a cartridge into the magnetic tape device, the magnetic tape being ejected from the cartridge, and the leading end of the magnetic tape being attached to the machine reel of the magnetic tape device. 1. An autoloading method for a magnetic tape device, comprising: confirming that the magnetic tape has been sufficiently wound around the magnetic tape device, placing the magnetic tape in a vacuum column of the magnetic tape device, and winding the magnetic tape onto the machine reel with a weak tension.