JPS58139362A - Magnetic tape reproducer - Google Patents

Abstract

PURPOSE:To attain smooth and sure magnetic running, by absorbing a magnetic tape contained in a tape driving section with air absorbing means, and providing a device with back tension. CONSTITUTION:A reel 1, a capstan 4, pinch rollers 5, 6 and a tape guide constituting the driving system of a magnetic tape 2 is provided on a square tape driving base 21, the base plate 21 is arranged on the same plane as a pin 16 and this plane is formed into a tapered plane higher upward in this paper. The tape driving base plate 21 is arranged at the right side of the tapered plane and the magnetic tape 2 is carried on the pin 16 being higher position than the plate 21.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic tape playback device, which includes a master playback device that plays back a master tape on which music signals are recorded at high speed, and a slave recording device that records the music signals played back by the master playback device at high speed. Among dereplicator systems consisting of machines, this device provides a device particularly suitable for master playback machines.

Conventionally, in this type of magnetic tape playback machine, the endless tape magnetic playback means and circulation means form the same vertical plane, and the magnetic tape is dropped from the magnetic playback means located at the top to the circulation means located at the bottom. There are those that reproduce the tape continuously, and those that have the magnetic reproducing means and the circulating means on the same plane and play the magnetic tape by continuously running it from the magnetic reproducing means to the circulating means. In any of these devices, the magnetic tape being supplied to the circulation means may be biased toward the bottom or part of the circulation means, and the tape may not be transferred smoothly within the circulation means, and may be folded into tapes that are accumulated in a loop. It had a fatal flaw: creases and skipping in the playback signal.

The present invention is intended to eliminate such conventional drawbacks, and one embodiment thereof will be described below with reference to the drawings.

Reference numeral 1 denotes a reel for loading and unloading the magnetic tape 2.

3 is a tape end detector that detects the end of the magnetic tape 2 fed out from the reel 1 between it and a reflecting plate 7;
The capstan 41 is feeding out the magnetic tape 2.
The pinch roller 6.6 and belt motor 12 are stopped. Note that the unwinding of the magnetic tape 2 from the reel 1 will be described later.

Each time the splicing tape 8 passes between the tape guide 11, which detects the number of rotations of the magnetic tape 2 by the reflection of light by the silver foil-like splicing tape that connects the starting end and the ending end of the magnetic tape 2, A counter counts the number of passes, and when a predetermined number of passes is reached, a stop command is given to the capstan 4, pinch rollers 5, 6, and belt motor 12, and the running of the magnetic tape 2 is stopped. 13 is a magnetic tape 2 in a closed loop consisting of a capstan 4 and two pinch rollers 6.
A rotating roller turns the tape around and displays the speed of the magnetic tape, and a strobe light is displayed by shining light onto the striped pattern on the outer periphery. 14°16 is the playback head,
° It is composed of lete. The playback head 14 is connected to the magnetic tape 2-4.
Of the two recording channels, the playback head 15 is for channels 1 and 3, and the playback head 15 is for channels 2 and 4.

The tape guide 11 is directed toward the bin 16 while regulating the magnetic tape 2 fed out at high speed by the capstan 4 and the pinch roller 6.6, and the magnetic surface of the magnetic tape 2 is directed to the tape guide 11. Air is blown out from holes formed in the arc-shaped contact surface 17 by an air pump (not shown) to prevent strong friction at high speeds.

Reference numeral 18 denotes a tape guide provided opposite to the tape guide 11, so that the tape fed out by the capstan 4 and the pinch roller 6 is reliably fed out in the direction of the bin 16 from between both tape guides 11 and 18. ing. Reference numeral 19 denotes an air jet section provided above the tape guide 11 so that the magnetic tape 2 fed between the two tape guides 11 and 18 is further smoothly fed into the bin 16;
Air is blown out in the direction of the bottle 16.

Reference numeral 20 denotes an air suction unit that sucks the magnetic tape 2 taken in from the bin 16 and applies pack tension to the magnetic tape 2 that is running endlessly.

A reel 1° and a capstan 4 constituting a drive system for the magnetic tape 2. The pinch rollers 5, 6, tape guides, etc. are provided on a rectangular tape drive board 21, and this tape drive board 21 is arranged on the same plane as the bin 16, and these planes are oriented upwardly in the paper. It is constructed of a high sloped surface. The tape drive board 21 is arranged on the right side of the lower position of this inclined surface, and the magnetic tape 2
is sent out from this tape drive board 21 toward the bin 16 located at a higher position. The magnetic tape 2 sent out from the tape drive board 21 runs in a space that is slightly larger than the tape width between the tape drive board 21, the plane of the bottle 16, and the plane formed by the opening/closing lid 22 and 23. - The opening/closing lid 22 is rotatably supported on the side wall of the main body 36 on the high end side wall of the bottle 16 using a hinge 24 as a fulcrum, and when opened, the open state is held by a stay 26 as shown in FIG. Retained.

Moreover, the opening/closing lid 23 is the opening/closing lid 23 facing the tape drive section on the tape driving board 21, and the opening/closing lid 23 is placed on a slightly higher side of the bin 16 than the tape driving board 21, and the opening/closing lid 23 is placed on the hinge 26 as a fulcrum.
It is rotatably supported relative to 2, and when opened, the 3rd
As shown in the figure, the open state is maintained by the step 27. As a result, operations such as replacing the magnetic tape can be performed without opening the opening/closing lid 22.
This can be done by opening only 3.

As shown in FIG. 4, countless grooves (hairline processing) 28 are formed on the surface of the bottle 16 in a direction perpendicular to its inclination direction, and the magnetic tape 2 slides from a high position to a low position in the direction of arrow C. The contact resistance of the side end surface of the magnetic tape 2 with respect to the bottle 16 is reduced when the magnetic tape 2 slides down the bottle 16 smoothly.

As shown in FIG. 6, a driving pulley 29 is fixed to a motor shaft 31 of the belt motor 12 by a screw 30 and a seat 32, and two V-grooves are formed on the outer periphery of the driving pulley 29. Note that the belt motor 12 is fixed to a motor board 33 with screws 34, and this motor board 33 is attached to the main body 3.
6 with screws 36.

Each of the plurality of driven pulleys 37 provided around the periphery of the bottle 16 is connected to a small diameter pulley 38 as partially shown in FIG.
and a large diameter pulley 39, and these two pulleys 38.3
A V groove is formed in the drive pulley 929, and the V groove of the driven pulley 37 located on both sides of the drive pulley 29 and the V groove of the drive pulley 929 are formed in the drive pulley 929.
A bell) 40 is hung in each groove, and bells) 40 are hung from the driven pulley 29 on both sides of the main drive pulley 29 to other driven pulleys 29 in series,
The pulleys S and ao are the drive pulleys 29, which are arranged on the tape drive board 21 so as to be opposite to the upper end of the tape guide 18;
(A3) - It is designed to be rotated in the same manner.

The small diameter pulley 38 and the large diameter pulley 39 of the driven pulley 29
By changing the outer diameter of the belt 40, the speed of the belt 40 that is stretched between the pulleys 1 and 30 can be freely set. In this embodiment, as shown in FIG.
Among the plurality of pulleys arranged at high positions in the bin 16, the speed of the pulleys 9 to 9, which the tape drive section substantially faces, is high and approximately constant; The speed of the belt 40 between A30 is sequentially reduced. This means that the magnetic tape 2, which is fed to the bin 16 at high speed from the low position to the high position on the slope, is reliably transported at the high position 1 by the belt 40 between the pulley heights 1 to &9, and stops midway. The belt 4 degrees between &9 and &30 causes the magnetic tape 2 to be accumulated sequentially from the periphery of the and 716 toward the center of the bin 16, and is deposited on a portion of the top of the bin 16. By preventing the looped magnetic tape 2 from shifting to one side, the area of the bin 16 can be used effectively.

The driven pulley 37 is fixed to the pin 16 with a nut 41, and is rotatably fitted into a bearing 46 fixed between a shaft 42 and a seat 43 with a screw 44. A synthetic resin layer 46 is still provided between the bottle 16 and the main body 36.

The inlet into the bin 1, which is in contact with the upper left part of the tape drive board 21, is a magnetic tape as shown in FIGS. 7 and 8.

The partition wall 49.2 is fixed to the shear bin 16 by screws 54a, 54b with these two rollers 47, 48 facing each other. 50 so as to be rotatable.

The magnetic tape 2 taken in from the intake port between the rows 247 and 48 is changed direction by the row 261 rotatably supported on the tape drive board 21 and fed to the right. Regulating pieces 51, 62 are attached to the upper surface of the partition wall 49, 50 by adhesive or the like, and a gap 63 through which the magnetic tape 2 can pass is formed between the two regulating pieces 61, 52, This gap 63 is from the intake port to the roller 6.
The roller 47
．． They are designed to intersect at part 48. As a result, when loading the magnetic tape 2, the magnetic tape 2 can be manually inserted between the rollers 47, 48 from the gap 63, and when the magnetic tape 2 is run, the height is adjusted by the magnetic tape 2Jd regulating piece 51, 52. This prevents it from jumping out of the gap 63. Therefore, it is possible to run the magnetic tape 2 stably at high speed even with the opening/closing lid 23 open, making it easy to adjust the angle of the reproducing head 14 and 15 and the running height of the magnetic tape 20. .

An air outlet 59.60 directed toward the center of the bottle 16 is provided on the front surface of the partition wall 49.50 adjacent to the roller 47.48.
．． 56 communicates with air pipes 67, 68, and air from the air pump passes through the air pipes 57, 58'i and is ejected from the air outlet 59, 60 in the opposite direction to the direction in which the magnetic tape 2 is taken in. The magnetic tape 2, which is in the shape of a shape, is corrected with air in the loading direction.

The partition wall 49 and the partition wall 60
and a partition wall 49a between the air jetting portion 19 and the air jetting portion 19, respectively.

60a is provided and the magnetic tape accumulated in the bin 16)",
.

1 and 2 does not enter the tape drive section. Note that 62 to To are tape guides that regulate the running height of the magnetic tape 2, and of these, 68 and 69 are height adjustable.

With the above configuration, the operation will now be described. First, as shown in FIG. 9, the loading end 2a of the magnetic tape 2 wound on the reel 1 is
between the tape guide 63, the tape end detector 3 and the reflector 7, and the tape guides 64, 66, 671. Between the pinch roller 5 and the capstan 4, the tape guide 68, the rotating roller 13, the tape guide 69, the reproducing heads 14, 15,
tape guide 70, between pinch roller 6 and capstan 4, tape guide 11, air jet section 19, bottle 16,
It is loaded between the rollers 47 and 48 in the normal path of the roller 61, and the starting end 2a is brought into contact with the air suction part 2o. Before or after loading the tape, air is sucked by the air suction section 2°, and the starting end 2af of the magnetic tape 2 is attracted and held in the air suction section 20 by this air suction. 1 When the first operation is performed in the above state, the pinch rollers come into pressure contact with the capstan 4 in the order of 6.6, and the magnetic tape 2 is sent toward the bin 16 at high speed. At the same time as this operation, air is blown out from the tape guide 11 and the air blowing part 19, and the belt motor 12 is driven to allow the magnetic tape 2 supplied to the bin 16 to be accumulated on the bin 16 without any force by the belt 40.

Note that during this loading, all air is not blown out from the air outlet 59.60 of the partition wall 49.50.

This is because if air is ejected from the air ejection ports 59 and 60, there is a risk that the starting end 2a of the magnetic tape 2 may come off from the air suction section 20 and enter the bin 16.

The magnetic tape 2 wound around the reel 1 in this way
are fed out one after another, and the terminal end 2b of the magnetic tape 2
When the light passes between the tape end detector 3 and the reflector 7, the tape end detector 3 detects the light reflected by the reflector 7,
This causes the stop command to be sent to capstan 4 and pinch loaf 5.
．． 6, the belt motor 12 is supplied to the air pump, the capstan 4, the belt motor 12 stops, and the pinch roller 6.6 leaves its capstan 4, and the tape guide 11. Air blowout from air blowout section 19.

Air suction by the air suction unit 20 is stopped.

As a result, as shown in FIG.
b is stopped by the tape drive unit without entering the bin 16, and the starting end 2a and the ending end 2b are connected with a silver foil-like splicing tape to form an endless tape.

The above-mentioned tape loading operation and connection operation can be performed in the area of the opening/closing lid 23 shown by the chain line in FIG. 10, and therefore, it is only necessary to open the opening/closing lid 23 without opening the opening/closing lid 22.

Next, when a second operation is performed, the pinch roller 6.6 comes into pressure contact with the capstan 4 as shown in FIG. 11, air jet part 19,
Air is ejected from the air ejection ports 59.60 of the partition wall 49.50, and the air is still sucked by the air suction portion 2o. As a result, the magnetic tape 2 is fed out at high speed by the capstan 4 and the pinch roller 6.6, and the fed magnetic tape 2
receives the air ejected from the tape guide 11 and the air ejection part 19, and travels almost toward the pulley height 4, and from there it is sequentially moved to the left of the shear bin 16 by the bell 40 in a meandering pattern. , gradually accumulates from the periphery of the bin 160 toward the center.

The air from the center of the bottle 16 is taken into the intake port at high speed while being corrected by air ejected from the air outlet 69.60 of the partition wall 49.60.
An appropriate pack tension is applied at o and the pack is drawn in by the capstan 4 and pinch roller 6.

In this case, the magnetic tape 2 is fed from a low position to a high position on the inclined surface, and the portion once lifted to a high position forms many loops and is forced to expand by itself and countless grooves 28 are formed. Due to the force of the bottle 16 trying to slide down the sloping surface, the loops are moved smoothly without interference between the loops.

Signals previously recorded on the magnetic tape 2, which is thus run endlessly at high speed, are reproduced by the reproduction heads 14 and 15, and the reproduced signals are supplied to the slave recorder for dubbing recording.

During the running of the magnetic tape 2, the tape running detector 8 detects the splicing tape every time the splicing tape passes between the tape running detector 8 and the tape guide 11. The number of laps is counted, and when the counted number matches the number stored in advance in a preset counter provided separately, a stop command is issued and the magnetic tape 2 is stopped.

Incidentally, the operation of winding the magnetic tape 2 onto the reel 1 is performed as follows.

First, the splicing tape connecting the magnetic tape 2 endlessly is removed, the end 2b is passed between the tape end detector 3 and the reflector 7, and the tape is wound around a reel. Then, by starting the third operation, the magnetic tape 2 is attracted by the air suction section 2o, air is ejected from the air outlet 59.60 of the partition wall 49.60, the reel 1 is rotated, and the magnetic tape 2 is Wind up 2. In this case, capstan 4,
The motors 5 and 6, the belt motor 12, etc. are stopped.

The magnetic tape 2 is wound onto the reel 1, and when the starting end 2& of the tape passes between the tape end detector 3 and the reflector 7, the tape end detector 3 detects the reflection of the light, and a stop command is issued. The rotation of the reel 1 is stopped, and the suction and ejection of air by the air suction section 20 and the air jet ports 59 and 60 are also stopped.

As is clear from the above embodiments, the present invention includes a tape drive section for running endlessly connected magnetic tapes at high speed, a tape drive board that supports the tape drive section, and a tape drive section for supporting the tape drive section. a flat bin for storing magnetic tapes that have been run at a high speed; a transport means provided around the periphery of the bin for moving the magnetic tapes stored in the bin; a first air blowing means for urging the magnetic tape accumulated on the bin toward the bin; and a second air blowing means for urging the magnetic tape accumulated on the bin in a direction opposite to the direction in which the magnetic tape is taken into the tape drive section.
and air suction means for sucking the magnetic tape taken into the tape drive section to impart pack tension to the magnetic tape, and the magnetic tape fed out from the tape drive section The stored magnetic tape is stored on the bin while being energized by the first air blowing means, and the accumulated magnetic tape is taken into the tape drive unit again while being energized by the second air blowing means, and the pack tension is increased by the air suction means. According to this structure, the magnetic tape fed out from the tape drive unit at high speed is energized by the first air jetting means and smoothly runs onto the bin. Therefore, the magnetic tape is not stagnated at the part where it exits the tape drive unit, and the magnetic tape taken into the tape drive unit from above the bin is removed by the second air blowing means. This eliminates the possibility of winding up other looped tapes, and furthermore, the magnetic tape taken into the tape drive unit is attracted by the air suction means, the pack tension is energized, and the overall The magnetic tape runs smoothly and reliably, and its effects are great.

[Brief explanation of the drawing]

FIG. 1 is a top view showing one embodiment of the present invention, FIG.
The figures are the same side view, Figure 4 is a sectional view taken along the Moum line in Figure 1, Figure 6 is a sectional view taken along line D-D in Figure 1, and Figure 6 shows the speed of the belt arranged around the periphery of the bottle. The figure shown, Figure 7, is the first
An enlarged view of part E in the figure, Figure 8 is a sectional view taken along line FF in Figure 7,
Fig. 9 is a top view showing the magnetic tape loading start operation, Fig. 10 is a top view showing the loading completion state, Fig. 11 is a top view showing the magnetic tape running state, and Fig. 12 is the winding of the magnetic tape. FIG. 13 is a top view showing the start time, and FIG. 13 is a top view showing the end time of winding. 1... Reel, 2... Magnetic tape, 3
...Tape end detector, 4...Ki j,
NP stamp, 6.6...pinch roller, completed...
...Reflector, 8...Tape running detector, 1
1...Tape guide, 12...Belt motor, 14.15...Playback head, 16...
・°°・Bottle, 19...Air jet part, 20...
River/air suction unit, 21...Tape drive board, 2
2.23°゛°°゛Opening/closing lid) 28...Groove, 29
・・・・・・Drive pulley, 35・・・・・・Main body, 37
....driven pulley, 4o...kawa/bell), 47.
48・°°・・・Roller, 49.50・River・・Bulkhead, 5
1.52...Pa degree regulation piece, 63 degree river...gap, 59.
60...River/Air outlet. Name of agent (patent attorney Toshio Nakao and 1 other person) 2nd Wi 3rd rlB 35' Fig. 14

Claims (1)

[Claims] A tape drive section for running the endlessly connected magnetic tapes at high speed, a tape drive board for supporting the tape drive section, and a flat plate-shaped tape drive section for accumulating the magnetic tapes run at high speed by the tape drive section. a bin, a transfer means provided around the periphery of the bin for moving the magnetic tape stored in the bin, and a first air jetting means for urging the magnetic tape sent out from the tape drive toward the bin. a second air blowing means for energizing the magnetic tape accumulated on the bin in a direction opposite to the direction in which the magnetic tape is taken into the tape drive section; The magnetic tape is provided with an air suction means for suctioning the magnetic tape in order to impart tension to the magnetic tape, and the magnetic tape fed out from the tape drive section is accumulated on the bin while being energized by the first air jetting means; The stored magnetic tape is energized by the second air blowing means and taken into the tape drive unit again, and pack tension is applied by the air suction means so that the magnetic tape is continuously run at high speed. A magnetic tape playback device characterized by: