JPH08147830A - Tape loading device - Google Patents

Abstract

PURPOSE: To prevent tape damage easy to occur when tape loading starts. CONSTITUTION: This device is provided with a pair of reel bases 12, 13 on which a pair of tape reels 2, 3 are placed, reel brake means 14, 15 individually braking respective reel bases 12, 13 and tape loading means 17-22 taking out a magnetic tape 4 from a pair of the tape reels 2, 3 and tape loading so as to spirally wind it round a rotary drum 24 rotating integrally with a magnetic head 25 over a prescribed angle. Then, when the tape loading starts, one side reel base 12 is made a non-brake state or slidable/movable state, and the other reel base 13 is braked, and from the stage on the way of the tape loading until the taking out of the magnetic tape 4 ends, by braking one side reel base 12 while braking the other reel base 13, the tape damage easy to occur when the tape loading starts is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents tape damage during tape loading until the magnetic tape is pulled out from a tape cassette and the drawn magnetic tape is spirally wound around a rotating drum, particularly at the beginning of tape loading. It relates to a tape loading device configured to prevent.

[0002]

2. Description of the Related Art Generally, a video tape recorder (V
TR), digital audio tape recorder (DA)
In a tape loading device such as T), a magnetic tape is drawn from a tape cassette, the drawn magnetic tape is spirally wound around a rotary drum rotating integrally with the magnetic head at a predetermined angle, and the magnetic head is rotated. It is well known that a helical scan is used to record and reproduce.

FIG. 5 is a plan view showing a tape loading start state in a conventional tape loading device, FIG. 6 is a plan view showing a tape loading process in the same tape loading device, and FIG. 7 is a view showing the same tape loading device. FIG. 8 is a plan view showing the tape loading completion state after the magnetic tape has been pulled out from the tape reel, and FIG.
FIG. 9 is a timing chart showing the operation of the supply reel and the take-up reel, and FIG. 9 is a diagram showing a state in which the tape guide causes damage to the tape at the start of tape loading in the tape loading device.

In FIG. 5, a tape loading device 1
On the front side in 0B, the supply reel 2 and the take-up reel 3 in the tape cassette 1 are rotatably provided on a flat chassis base 11, and the supply reel stand 12 and the take-up reel stand 13 are provided.
And are installed respectively. At this time, the rotation force is selectively transmitted to the supply reel base 12 and the take-up reel base 13 by utilizing the driving force of a capstan motor (not shown).

In the tape cassette 1, the magnetic tape 4 is wound around the supply reel 2 and the take-up reel 3 in the initial state before tape loading, and the magnetic tape 4 ejected from the supply reel 2 is the tape cassette 1. The winding reel 3 is wound around the semicircular poles 5 and 6 on the supply side and the winding side, which are provided in the front portion of the inside. Further, a loading pocket 1a having an opening on the bottom side is formed in the front portion of the tape cassette 1 with the semicircular pole 5 on the supply side and the semicircular pole 6 on the winding side sandwiched therebetween.

Further, a supply reel brake 14 and a take-up reel brake 15 are provided on the supply reel base 12 and the take-up reel base 13, respectively, so that they can come into contact with and separate from each other. The supply reel brake 14 and the take-up reel brake 15 are connected to the shaft 1
Brake lever 14 rotatable about 4a and 15a
Felts 14c, 1 serving as friction members at one end of b, 15b
5c is adhered, and springs 14d and 15d are hooked on the other ends through the shafts 14a and 15a. Further, the supply reel brake 14 and the take-up reel brake 15 are connected to the supply reel base 12 by a control cam (not shown).
The take-up reel stand 13 is in a braking state or a non-braking state. However, at this time, one reel brake (14) or (15) on the side where the magnetic tape 4 is pulled out is set to have a weaker braking force than the other reel brake (15) or (14).

In the tape loading device 10B, some tape guide members serving as tape loading means are provided near the front portion of the tape cassette 1 corresponding to the supply side and the winding side.

That is, a tape guide 16 is provided upright on a flat chassis base 11 on the left outer side of the front portion of the tape cassette 1 so as to correspond to the supply reel 2 side of the tape cassette 1. Further, the tape guide 17 for pulling out the tape, which is supported by a loading arm (not shown), extends from the left to the center in the loading pocket 1a of the tape cassette 1 outside the tape cassette 16.
A tape winding tape guide 18 movably provided to a predetermined position on the left front side of the rotating drum 24 and supported by a loading base (not shown).
Further, the inclined pole 19 is provided movably toward the left rear side of the rotary drum 24.

On the other hand, corresponding to the take-up reel 3 side of the tape cassette 1, the inclined pole 20 and the tape supported by a loading base (not shown) from approximately the center to the right in the loading pocket 1a of the tape cassette 1. A tape pull-out tape guide 2 in which a winding tape guide 21 is movably provided toward the right rear side of the rotary drum 24 and is supported by a loading arm (not shown).
2 is provided movably toward a predetermined position on the right front side of the rotary drum 24, passing over a tape guide 23 standing on the right outside of the front portion of the tape cassette 1.

At this time, the tape pull-out tape guides 17 and 22 on the supply side and the take-up side have upper and lower flange portions for restricting the height of the magnetic tape as shown in FIG. The tape pull-out tape guides 17 and 22 are supported by a loading arm (not shown) and rotate substantially parallel to the chassis base 11 while moving the magnetic tape 4 outside the tape cassette 1 to a predetermined left and right in front of the rotary drum 24. It has a function to pull out to the position. on the other hand,
Tape guide 1 for tape winding on supply side and take-up side
As shown in FIG. 9, 8 and 21 also have the upper and lower flange portions that regulate the height of the magnetic tape. Then, the tape winding tape guide 18 and the inclined pole 19 on the supply side, the inclination pole 20 and the tape winding tape guide 21 on the winding side move along the guide groove (not shown), and thus the magnetic tape 4 is rotated. It has a function of winding around 24.

Further, the rotary drum 24 provided inside the tape loading device 10B facing the front portion of the tape cassette 1 includes an upper drum 24a which rotates counterclockwise integrally with the magnetic head 25, and a magnetic tape. A lead (not shown) for guiding the coil 4 in a spiral shape is formed and is coaxially combined with the lower drum 24b fixedly installed.

Although the capstan and the pinch roller, which are driving sources for running the magnetic tape 4, are provided on the winding side, they are not shown here.

Next, the tape loading operation by the above-mentioned conventional tape loading device 10B will be described with reference to FIGS.

First, as shown in FIG. 5, at the start of tape loading, the tape pull-out tape guides 17 and 22 waiting on the left and right in the loading pocket 1a of the tape cassette 1 and the tape pull-out tape guides 17 and 22. By the tape winding tape guide 18 and the inclined pole 19, the inclined pole 20 and the tape winding tape guide 21 which are waiting between the magnetic tape 4 and the tape cassette 1, the magnetic tape 4 is wound around the front portion of the tape cassette 1. Pulled out. At the start of tape loading, as shown in FIG. 8, the supply reel base 12 and the take-up reel base 13 are connected to the supply reel brake 14
Since tension is applied to the magnetic tape 4 by the take-up reel brake 15 and the take-up reel brake 15, respectively, one of the reels (2) whose braking force is set weak in this state,
The magnetic tape 4 is pulled out from (3).

Next, as shown in FIG. 6, in the intermediate stage after the tape loading is started, the tape pull-out tape guides 17 and 22 move substantially parallel to the chassis base 11 and cross the tape guides 16 and 23. Further, the tape winding tape guide 18, the inclined pole 19, the inclined pole 20, and the tape winding tape guide 21 reach the left and right front of the rotary drum 24 along a guide groove (not shown). Even during this tape loading stage,
As shown in FIG. 8, the magnetic tape 4 is pulled out while the supply reel brake 14 and the take-up reel brake 15 maintain the braking state.

Next, as shown in FIG. 7, the tape pull-out tape guides 17 and 22, the tape winding tape guide 18 and the inclined pole 19, the inclined pole 20 and the tape winding tape guide 21 are further moved. Meanwhile, the magnetic tape 4 is spirally wound around the rotary drum 24 at a predetermined angle. At this time, until the magnetic tape 4 is completely pulled out from either one of the reels (2) and (3), as shown in FIG.
4 and the take-up reel brake 15 are braking,
After pulling out the magnetic tape 4 from one of the reels (2) and (3), both reel brakes 14 and 15 are put into a non-braking state. Then, the magnetic tape 4 is attached to the rotary drum 24.
The magnetic head 25 rotating integrally with the magnetic head 25 makes a helical scan for recording and reproduction.

[0017]

By the way, in the conventional tape loading device 10B, particularly when the tape loading is started, the tape guide 17, as shown in FIG.
Tape damage easily occurs due to the flange portions of 18, 21, 22.

The reason for this is that the magnetic tape 4 wound around the supply reel 2 and the take-up reel 3 in the tape cassette 1 has winding unevenness in the height direction, and the magnetic tape 4 is wound around the front portion of each tape cassette 1. Since the heights of the tapes 4 are different, the upper and lower flange portions formed on the tape guides 17, 18, 21, 22 waiting in the loading pocket 1a of the tape cassette 1 and the end portions of the magnetic tape 4 are formed. The height does not match, and the end of the magnetic tape 4 is the tape guide 1.
The outer periphery of the flange portion of 7, 18, 21, 22 will come into contact. At this time, as described above, the tension is applied to the magnetic tape 4 because the supply reel brake 14 and the take-up reel brake 15 are braking the supply reel base 12 and the take-up reel base 13 respectively at the start of tape loading. Is
This tension causes the tape tape guide 17, 18, 2
The magnetic tapes 4 that come into contact with the outer circumferences of the flange portions of the tapes 1, 22 are buckled, and the tape guides 17, 18, 2
Even if the magnetic tapes 1 and 22 start to move out of the tape cassette 1, the magnetic tape 4 is moved to the tape tape guides 17, 18, 21, 22.
Since it does not separate from the flange part of, it causes tape damage. When the tape damage occurs in this way, not only the recording / reproducing by the magnetic tape 4 is significantly deteriorated, but also the magnetic tape 4 may become unusable. Further, both the supply reel 2 and the take-up reel 3 or either one of the reels (2) and (3) can be tape-loaded in a non-braking state, but in this case, due to the tape reel inertia when the tape drawing is completed. The magnetic tape 4 is delivered from the reels (2) and (3), and the tape is damaged due to slack in the tape and the tape guides 17, 18, 21, 22 falling off from the flanges.

By the way, recently, the magnetic tape 4 is required to have high image quality and high sound quality. Therefore, although a thin metal tape or the like is often used, this type of metal tape or the like is not used. Since the tape thickness is thin and the rigidity is low, the tape damage as shown in FIG. 9 tends to occur frequently. Therefore, a tape loading device capable of preventing the tape damage which tends to occur at the time of starting the tape loading is desired. It is rare.

[0020]

The present invention has been made in view of the above problems, and a pair of reel stands on which a pair of tape reels are mounted, and a reel brake for individually braking each reel stand. Means and tape loading means for loading the magnetic tape from the pair of tape reels and tape-loading it so as to spirally wind it around a rotary drum rotating integrally with the magnetic head at a predetermined angle. At the start of loading, one of the reel bases is put into a non-braking state or a sliding state, the other reel base is braked, and the other reel base is kept in the brake state from the middle stage of tape loading to the completion of pulling out the magnetic tape. The present invention provides a tape loading device characterized by being configured to brake a reel base.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the tape loading device according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a plan view showing a tape loading start state in a tape loading apparatus according to the present invention, FIG. 2 is a plan view showing a tape loading process in the tape loading apparatus, and FIG. FIG. 4 is a plan view showing the tape loading completion state after the magnetic tape is completely pulled out from the tape reel in the apparatus, and FIG. 4 is a timing chart showing the operation of the supply reel and take-up reel bouquets which are the main parts in the tape loading apparatus. Is.

The structure of the tape loading device 10A according to the present invention is the same as the structure of the conventional tape loading device 10B described above. The difference from the conventional example is the supply reel brake 1 at the time of tape loading.
4 and the take-up reel brake 15 are only different in operation. For convenience of explanation, the same reference numerals will be given to the same constituent members as those described above, and the difference from the conventional example will be described. I will explain mainly.

As shown in FIG. 1, a tape loading device 10A according to the present invention comprises a pair of reel bases (supply) on which a pair of tape reels (supply reel, take-up reel) 2 and 3 in a tape cassette are mounted. Reel stand, take-up reel stand)
12, 13 and reel brake means (supply reel brake, take-up reel brake) 14, 15 for individually braking the respective reel stands 12, 13 and a pair of tape reels 2.
The magnetic tape 4 is pulled out from the magnetic tape 3 and the tape is loaded on the rotary drum 24 which rotates integrally with the magnetic head 25 so as to be spirally wound around the rotary drum 24 at a predetermined angle.

Further, in the tape loading apparatus 10A according to the present invention, at the time of tape loading, the supply reel brake 14 brakes the supply reel stand 12 and the take-up reel brake 15 takes up the take-up reel stand 12.
The braking operation to (1) is performed individually by a control cam or the like (not shown).

The tape loading operation of the tape loading device 10A according to the present invention will be described below with reference to FIGS.

First, as shown in FIG. 1, at the start of tape loading, the tape pull-out tape guides 17 and 22 waiting on the left and right in the loading pocket 1a of the tape cassette 1 and the tape pull-out tape guides 17 and 22. By the tape winding tape guide 18 and the inclined pole 19, the inclined pole 20 and the tape winding tape guide 21 which are waiting between the magnetic tape 4 and the tape cassette 1, the magnetic tape 4 is wound around the front portion of the tape cassette 1. Pulled out.

At the start of this tape loading,
As also shown, the supply reel brake 14 puts the supply reel base 12 in the non-braking state or the sliding state. In other words, the supply reel base 12 is in a free rotation state in which no brake is applied, or is in a state in which a weak brake is applied to enable smooth rotation. When the supply reel brake 14 is brought into the non-braking state or the sliding state, only the position of a control cam or the like (not shown) is different, whereby the turning state of the brake lever 14b and the urging force of the spring 14d are different. Only. on the other hand,
Since the take-up reel brake 15 is braking the take-up reel stand 13, the take-up reel stand 13 cannot rotate. Therefore, at the beginning of tape loading, the tape loading means 17 to 17
The magnetic tape 4 wound around the supply reel 2 is pulled out as the operation of moving the tape 22 out of the tape cassette 1.
At this time, on the supply reel 2 side, the braking operation is in the non-braking state or the sliding state, and the pulling-out magnetic tape 4 is not applied with tension more than necessary. Even when the heights of the upper and lower flange portions formed on the magnetic tapes 22, 22 and the ends of the magnetic tape 4 do not match, the tape guides 17, 18, 21, 22
Of the tape guides 17, 18 and 2 without buckling the magnetic tape 4 that has come into contact with the outer periphery of the flange portion of the
When the magnetic tapes 1 and 22 start to move out of the tape cassette 1, the magnetic tape 4 is immediately restricted by the upper and lower flange portions.
No tape damage occurs. As a result, not only is the life of the magnetic tape 4 improved, but it is also possible to use, for example, a thin magnetic tape 4, and
On the other hand, the tape loading device 10A according to the present invention
There are advantages such as that the quality and reliability of can be improved.

In the embodiment, the magnetic tape 4 is pulled out from the supply reel 2 side, but the present invention is not limited to this, and when the magnetic tape 4 is pulled out from the take-up reel 3 side, the supply reel base 12 is braked. Then, the take-up reel base 13 may be brought into a non-braking state or a sliding state.

Next, as shown in FIG. 2, in the intermediate stage after the tape loading is started, the tape pull-out tape guides 17 and 22 move substantially parallel to the chassis base 11 and cross the tape guides 16 and 23. Further, the tape winding tape guide 18, the inclined pole 19, the inclined pole 20, and the tape winding tape guide 21 reach the left and right front of the rotary drum 24 along a guide groove (not shown). During this tape loading stage,
As shown in FIG. 4, the supply reel brake 14 that was in the non-braking state or the sliding state is brought into the braking state, and the take-up reel brake 15 is kept in the braking state. However, at this time, the braking force on the supply reel 2 side is set to be weaker than the braking force on the take-up reel 3 side. Here, since the supply reel 2 side is in a braking state, tension is applied to the magnetic tape 4, but the magnetic tape 4 is not guided by the tape guides 17, 18, 21, 2.
Since the upper and lower sides have already been regulated by the second flange portion, the tape guides 17, 18, 21, 22 can be further pulled out without derailing to the flange portion side.

Next, as shown in FIG. 3, the tape pull-out tape guides 17 and 22, the tape winding tape guide 18 and the inclined pole 19, the inclined pole 20 and the tape winding tape guide 21 are further moved. Meanwhile, the magnetic tape 4 is spirally wound around the rotary drum 24 at a predetermined angle. At this time, until the magnetic tape 4 is completely pulled out from the supply reel 2, the supply reel brake 14 and the take-up reel brake 15 are braking as shown in FIG. 4 so that the tape slack due to the inertia of the tape reel does not occur. However, after pulling out the magnetic tape 4 from the supply reel 2, the reel brakes 14,
Both 15 are in the non-braking state. Of course, unlike the embodiment, the same applies to the case where the magnetic tape 4 is pulled out from the take-up reel 3. After that, the magnetic tape 4 is helically scanned and recorded / reproduced by the magnetic head 25 that rotates integrally with the rotary drum 24.

[0032]

According to the tape loading apparatus of the present invention described in detail above, at the beginning of tape loading, one reel stand is brought into a non-braking state or a sliding state, and the other reel stand is braked, so that the tape loading process is started. Until the completion of pulling out the magnetic tape, one reel stand is braked while the other reel stand is being braked, so that no more tension than necessary is generated in the magnetic tape at the start of tape loading, and the conventional example has been described. It is possible to prevent such tape damage that tends to occur at the start of tape loading, not only improve the life of the magnetic tape, but also to use a thin magnetic tape, for example, and to apply the present invention to the magnetic tape. There is an advantage that the quality and reliability of the tape loading device concerned can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a tape loading start state in a tape loading device according to the present invention.

FIG. 2 is a plan view showing a tape loading process in the tape loading device according to the present invention.

FIG. 3 is a plan view showing a tape loading completion state after the magnetic tape is completely pulled out from the tape reel in the tape loading device according to the present invention.

FIG. 4 is a timing chart showing the operation of the supply reel and take-up reel boots, which are the main parts, in the tape loading device according to the present invention.

FIG. 5 is a plan view showing a tape loading start state in a conventional tape loading device.

FIG. 6 is a plan view showing a tape loading process in the conventional tape loading device.

FIG. 7 is a plan view showing a tape loading completion state after the magnetic tape is completely pulled out from the tape reel in the conventional tape loading device.

FIG. 8 is a timing chart showing the operation of the supply reel and the take-up reel in the conventional tape loading device.

FIG. 9 is a diagram showing a state in which a tape is damaged by a tape guide at the start of tape loading in a conventional tape loading device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tape cassette, 2 ... Supply reel, 3 ... Take-up reel, 4 ... Magnetic tape, 10A ... Tape loading device, 12 ... Supply reel stand, 13 ... Take-up reel stand, 14 ...
Supply reel brake, 15 ... Take-up reel brake, 1
7,22 ... Tape guide for tape drawing, 18,21
... Tape winding tape guides, 19,20 ... Inclined poles, 24 ... Rotary drums.

Claims (1)

[Claims] 1. A pair of reel stands on which a pair of tape reels are mounted, a reel brake means for individually braking each reel stand, and a magnetic tape which is pulled out from the pair of tape reels and integrated with a magnetic head. And a tape loading means for tape-loading so as to be wound spirally around a rotating drum at a predetermined angle, and at the beginning of tape loading, one reel stand is put into a non-braking state or a sliding state, and the other The tape loading device is configured to brake the reel base, and to brake one reel base while the other reel base is being braked from the middle stage of tape loading to the completion of drawing the magnetic tape.