JPS61296558A - Loading device for recording carrier - Google Patents

Abstract

PURPOSE:To prevent excess pay-off of a recording medium by applying loading while a recording carrier is being stored at a point of time during the loading and covering the recording carrier draw-out quantity by the stored recording carrier until the end of loading from the point of time. CONSTITUTION:When a loading ring 7 is turned in the direction of arrow, the succeeding unit 1 keeps the spreading state regulated by the engagement between a pin 1e and a slot 7b under the energizing of the 1st spring until the point of time just before loading and is interlocked with the loading ring 7 to draw a tape T from a supply reel R. In the process that the loading ring 7 is turned further, the pay-off quantity of the tape T due to the movement of the preceding unit 3 in the loading direction is covered by an excess caused by the clockwise turning of the succeeding unit 1 and the tape T is not almost drawn from a cassette C during this time.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a record carrier loading device in a recording or reproducing device using, for example, a tape-shaped record carrier.
In particular, it relates to means for preventing excessive combing of the record carrier during loading.

(Prior Art) (Figs. 3 and 4) Fig. 3(A) shows the state immediately before the end of loading of a conventional tape loading device in a recording or reproducing apparatus using a tape-shaped record carrier; B) shows the state at the end of loading. In (4) of the same figure, it is assumed that tape loading is performed by rotating the loading ring 7 clockwise (Fig. φ)
When the speed of the loading ring 7 suddenly decreases to zero when the loading is completed at the end of the loading shown in FIG. Excessive combing will occur due to inertia.

In FIG. 4, the rotation angle of the loading 7 is α, the rotation speed of the supply reel R rotated by the tape T pulled out during loading is b, and the tape T is unrolled t.
(The lower left side of the figure is the shaded area), and αl in the figure indicates the rotation angle (rotational position) when loading is completed and the loading ring 7 stops.
The shaded area (bottom right) indicates excessive shedding. If the tape is overextended in this way, the tape T may come off the guide (for example, Jb, Jc, Jd, etc.), the tape T under tension may be damaged (by the guide), or the mode may lag after loading. arise.

Particularly when using thin tape, a very long loading time is required to keep the combing speed down.

Conventionally, the tension detection arm 5 and the pin 5b provided thereon have been used to absorb the above-mentioned excessive extension. That is, the tension detection arm 5 is biased counterclockwise by a spring (not shown) so that it can follow the increase in the tape loop, and when the tape T is combed out excessively, the tension detection arm 5 follows this and is activated. 5 rotates counterclockwise to increase the tension applied to the tape T, and if a band brake is attached to the arm 5, the supply reel R
The brake is applied to stop the Chi fT from pulling out the comb.

In FIG. 3, members given the same reference numerals as those in FIG. 1 described later will be explained in detail with reference to FIG. 1, and their explanation will be omitted here.

(Problem to be solved by the invention) However, with regard to the excessive ejection absorption means using a high-tensile detection arm, the damping phenomenon of the detection arm is not a problem, and the vibration of the detection arm disappears and becomes stable. The disadvantage is that it takes a long time to complete. Another possibility is to reduce the speed of the loading ring just before the end of loading, but this would complicate the control circuit and result in a significant cost advantage.

The invention therefore eliminates the aforementioned drawbacks of the conventional device, does not require a long time for the record carrier to stabilize, and with a simple construction υ prevents overextrusion of the record carrier at the end of loading. It is an object of the present invention to provide a record carrier loading device equipped with means capable of performing the following steps.

(Means for Solving the Problems) In order to solve the above problems, the record carrier loading device of the present invention includes means for loading the record carrier while storing it at least at one point during the loading operation;
and means for ensuring that at least a part of the amount of record carriers withdrawn from said time point until the end of loading is covered by said stored record carriers.

(Function) Based on the above configuration, the record carrier loading device of the present invention performs loading while accumulating the record carrier at least at one point during the loading operation, and at least the amount of the record carrier withdrawn from the point in time until the end of loading. A portion of the storage space is filled by the stored record carriers, and the amount of record carriers withdrawn from the cassette is zero or a minute amount just before the end of loading 7.

(Embodiment) The structure and operation of an embodiment of the record carrier loading device of the present invention will be described in detail below with reference to FIGS. 1 and 2. The following description will be made with reference to an example in which the record carrier is in the form of a tape, but the invention is equally applicable to the case where a wire-shaped record carrier is used.

(Configuration of an embodiment of this invention) (Figure 1 (A)) Figure 1 (
4) shows the state immediately before the end of loading of an embodiment of the record carrier loading device of the present invention. In the figure, 1 is a trailing loading unit, 3 is a leading loading unit, and trailing unit 1 has a pair of Movable tape guide l
a and la are provided, and the unit 1 is rotatably attached to the gyrloading ring 7 by a pivot 1b,
Moreover, it is biased counterclockwise by a first spring (not shown). The rotation of the unit 1 in the counterclockwise direction is restricted to the illustrated position because the pin 1e is engaged with the slot 7b of the loading ring 7. On the other hand, the preceding unit 3 is provided with a loading post 3a and a movable tape guide 3b, and the unit 3 is guided by a loading ring 7.

Reference numeral 2 denotes a pressing lever, which is provided near the stop position when the loading of the trailing unit 1 is completed, and is rotatable by a pivot 2c, and is supported by a second spring (not shown) (stronger than the first spring). The cam follower portion 2b is biased counterclockwise, and the cam follower portion 2b is in contact with the outer peripheral surface of the opening ring 7. Further, a working pin 2a for the trailing unit 1 is provided at the tip of the lever 2.

4 is a rotating drum, C is a cassette, R is a supply IJ-le,
1 shows the tape being pulled out from the supply reel R and running. Reference numeral 5 denotes a tension detection arm which is rotatable about a pivot shaft 5&, and a tension detection pin 5b is provided at the tip thereof.

5 a s 6 b tri fixed tape guide, 8 is a fixed tape regulation pin on the input side of drum 7, 9 is a fixed full width erase head, 10 is a fixed tape regulation pin on the output side of drum R, 11 is a cue Head, 12.16 is a fixed tape guide, 13 is a capstan, 14 is a pinch roller,
15 is a movable tape guide (loading post). The rotary drum 4 or fixed tape guide 16 is well known in conventional magnetic tape loading devices.
Furthermore, since they are not directly related to the features of the present invention, detailed explanations regarding these will be omitted.

(Operations of the embodiments of the present invention, etc.) (Figures 1 and 2) In the above configuration, during loading, the loading ring 7 is connected to a loading motor (not shown) and a transmission mechanism for transmitting the driving force of the motor, etc. Figure 1 (4)
), the trailing unit 1 rotates in the direction of the arrow (not shown) until the time immediately before loading shown in the figure.
Under the bias of the spring, the tape T is pulled out from the supply reel R while being kept in the expanded state regulated by the engagement between the bin 1e and the slot 7b and carried by the loading ring 7.

In particular, in the state shown in the figure, since the trailing tape loading unit 1 is in an expanded state, the tape T is loaded while being temporarily stored, and in this state, the tape T is under tension. It is given. In carrying out this invention, it is not necessary to load the record carrier (tape) while storing it as described above continuously from the start of loading; it can be performed at a certain point during the loading operation. At that point, see Figure 1 (4).
It is possible to do this just before the end of loading as shown in .

When the loading ring 7 further rotates beyond the position shown in FIG.
The lever 2 is rotated counterclockwise. As a result, the bottle 2& at the tip of the reno gear 2 presses the side surface 1a of the trailing unit 1, causing the unit 1 to rotate clockwise against the bias of the first spring. During this time, the leading and trailing units 3 and 1 reach their respective loading end positions and stop when the loading ring 7 stops. From the time shown in FIG. 1(A) to the end of loading shown in FIG. 1(A), the trailing unit 1 is in the expanded state shown in FIG. It is pulled out by unit 3.

In this way, in the process of transitioning from the state shown in FIG. 1 (4) to the state shown in FIG. The surplus generated by the clockwise rotation of the trailing unit 1 of the loop is used, and during this time the cassette C
The tape T is hardly pulled out from there.

FIG. 2, corresponding to FIG. 4, shows the tape drawer in the embodiment of the invention shown in FIG. In Fig. 2, compared to Fig. 4, there are very few (almost no) excessive withdrawals after the loading ring 7 has stopped (on the right side of α1 in the figure), and there are very few tape posts due to excessive withdrawal. There is no risk of it falling off or being damaged. In the embodiment shown in FIG. 1, the tape T is
Since the tape T is already stable due to the tension applied to it, the conventional tension detection arm (5 in Figure 3)
) It does not take a long time to stabilize the tape due to the damping of the tension detection arm 5, unlike the excessive drawing absorbing means.

The two-dot chain line in Figures 2 and 4 indicates the amount of tape drawn out when the remaining amount of tape on the supply reel is small. Since the inertia due to The tape T is pulled out from the supply reel R by a small amount at a very slow speed due to an increase in the rotational speed of the tape T and the like. In this case as well, the main tape loading operations are basically the same as those already described.

In the embodiment shown in FIG. 1, during unloading, the tape is wound onto the supply reel R through the state shown in FIG. 1B and the state shown in FIG.

In the embodiment shown in FIG. 1, the tape T is stored and drawn out by the trailing unit 1, but this can also be done by the leading unit 3.

(Effects of the Invention) As described above, according to the present invention, loading is performed while accumulating the record carrier at least at one point during the loading operation, and at least a portion of the amount of the record carrier withdrawn is stored from the point in time until the end of loading. is filled by said stored record carrier, so that it does not take a long time for the record carrier to stabilize, and with a simple construction, it is possible to prevent excessive ejection of the record carrier at the end of loading. I can do it. Furthermore, since it is possible to prevent excessive ejection of the record carrier without using a tension detection arm unlike conventional devices, it can also be applied to devices having electrical or non-contact record carrier tension detection means. can.

[Brief explanation of the drawing]

FIG. 1(A) is a plan view showing the state immediately before the end of loading of an embodiment of the record carrier loading device of the present invention; FIG. The figure is a line diagram showing how the record carrier is pushed out in the device shown in FIG. 1, FIG. It is a low diagram. Explanation of symbols z: Trailing loading unit, 1.: Trailing unit 1
2: Pressing lever, 2a: Working pin for trailing unit 1, 2b: Cam follower section, 3: Leading loading unit, 7: Loading ring, 7
a: Its recessed portion, 7b: A slot provided in the loading ring 7. Figure 1 (A) αf α Figure 3 (A)

Claims (1)

[Scope of Claims] Means for loading a record carrier while accumulating it at least at one point during a loading operation, and at least a part of the amount of record carrier withdrawn from said point in time until the end of loading is carried out by said accumulated record carrier. a record carrier loading device comprising: means for causing the load to be loaded by;