JPH073720B2 - Record carrier loading device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a record carrier loading device in a recording or reproducing device using a tape-shaped record carrier, for example.
In particular, it relates to a means for preventing the record carrier from being overwhelmed during loading.

(Prior Art) (FIGS. 3 and 4) FIG. 3A shows a state immediately before the end of loading of a conventional tape loading device in a recording or reproducing device using a tape-shaped record carrier. B) shows the state at the end of the loading. In the same figure (A), the tape is loaded by rotating the loading ring 7 clockwise, and when the loading ring 7 is stopped at the end of the loading shown in the same figure (B), the speed suddenly becomes zero. The tape T, which has been fed at a certain speed, is excessively fed by the inertia of the supply reel R and the tape roll wound around it.

FIG. 4 shows the amount of tape T fed out (hatched portion in the lower left of the figure), where α is the rotation angle of the loading 7 and is the rotational speed of the supply reel R rotated by the tape T pulled out at the time of loading. α ₁ indicates the rotation angle (rotational position) of the loading ring 7 when the loading ring 7 is stopped and the loading ring 7 is stopped. The right side of the α _{1 in} FIG. If the tape T is excessively extended in this manner, the tape T is disengaged from the guide (for example, 3b, 1c, 1d, etc.), the tape T under tension is damaged by the guide, or a mode delay phenomenon occurs after the loading is completed. Particularly when a thin tape is used, a very long loading time is required because the feeding speed is suppressed.

Conventionally, the tension detection arm 5 and the pin 5b provided on the tension detection arm 5 have been used to absorb the above-mentioned excessive extension. That is, the tension detecting arm 5 is urged counterclockwise by a spring (not shown) so as to follow the increase of the tape loop, and when the tape T is excessively fed out, the arm 5 follows the counterclockwise. When the arm 5 is attached with a band brake, the supply reel R is braked and the feeding of the tape T is stopped.

It should be noted that, in FIG. 3, members given the same reference numerals as those in FIG. 1 described later will be described in detail with reference to FIG. 1, and description thereof will be omitted here.

(Problems to be Solved by the Invention) However, with respect to the excessive feed-out absorbing means by the tension detecting arm, the damping phenomenon of the detecting arm poses a problem, and it takes a long time for the vibration of the arm to disappear and stabilize. There are drawbacks. Other means such as decreasing the speed of the loading ring immediately before the end of loading can be considered, but the control circuit becomes complicated and the cost becomes considerably disadvantageous.

Therefore, the present invention eliminates the above-mentioned drawbacks of the conventional device, and does not require a long time for the record carrier to stabilize, and with a simple configuration, can prevent the record carrier from being excessively extended at the end of loading. It is an object of the present invention to provide a record carrier loading device provided with a means capable.

(Means for Solving the Problems) In order to achieve the above object, a record carrier loading device according to the present invention includes a first tape pull-out member that pulls out a tape stored in a cassette and moves around a rotary drum. A second tape pull-out member for pulling out the tape and guiding the tape between the first tape pull-out member and the cassette at the end of loading and a second tape pull-out member are provided upright. A rotating member that is rotatably supported and is urged in a direction in which the second tape pull-out member is separated from the rotating drum, and a restricting member that restricts the rotating operation of the urged rotating member. And an actuating member for rotating the rotating member against the bias so that the second tape pull-out member approaches the rotating drum. At one point during the loading operation, the operating member rotates the rotating member against the bias, and the second tape pull-out member approaches the rotating drum from the time point until the end of loading. The first tape pull-out member is configured to move so as to wind the loose tape around the rotary drum.

(Operation) The record carrier loading device of the present invention is based on the above-mentioned configuration, loading is performed while storing the record carrier at least at a temporary point during the loading operation, and the amount of pulling out the record carrier from the time point to the end of loading is determined. At least a part of the record carrier is filled with the stored record carrier, and the amount of the record carrier pulled out from the cassette is zero or minute immediately before the end of loading.

(Embodiment) The construction and operation of the embodiment of the record carrier loading device of the present invention will be described in detail below with reference to FIGS. The following description will be made on an example in which the record carrier is in the form of a tape, but the present invention can be similarly applied to the case of using the wire record carrier.

(Structure of Embodiment of the Present Invention) (FIG. 1 (A)) FIG. 1 (A) shows a state of an embodiment of a record carrier loading apparatus of the present invention immediately before the end of loading, in which 1 is a rear portion. The row loading unit 3 indicates a leading loading unit, the trailing unit 1 is provided with a pair of movable tape guides 1c and 1d, and the unit 1 includes a pivot 1b.
Is rotatably attached to the loading ring 7 and is biased counterclockwise by a first spring (not shown). The rotation of the unit 1 in the counterclockwise direction is
Since the pin 1e is engaged with the slot 7b of the loading ring 7, it is restricted to the position shown in the figure. 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 carried by a loading ring 7.

A pressing lever 2 is provided in the vicinity of a stop position of the trailing unit 1 after the end of loading, is pivotable by a pivot 2c, and is rotated by a second spring (not shown) (stronger than the first spring). The cam follower portion 2b is biased in the clockwise direction and is in contact with the outer peripheral surface of the loading ring 7. An action pin 2a for the trailing unit 1 is provided at the tip of the lever 2.

Reference numeral 4 denotes a rotating drum, C denotes a cassette, R denotes a supply reel, and T denotes a tape pulled out from the supply reel R and running.
Reference numeral 5 is a tension detecting arm, which is rotatable about a pivot 5a, and a tension detecting pin 5b is provided at its tip. 6a and 6b are fixed tape guides, 8 is a fixed tape regulation pin on the entrance side of the rotary drum 4, 9 is a fixed full width erasing head, 10 is a fixed tape regulation pin on the exit side of the rotary drum 4, and 11 is a cue. Heads 12, 12 and 16 are fixed tape guides, 13 is a capstan, 14 is a pinch roller, and 15 is a movable tape guide (loading post). The rotary drum 4 and the fixed tape guide 16 are well known in the conventional magnetic tape loading apparatus and have no direct relation to the features of the present invention, and thus detailed description thereof will be omitted.

(Operation and the like of the embodiment of the present invention) (FIGS. 1 and 2) In the above-described configuration, the loading ring 7 is configured to load a loading motor (not shown) and a transmission mechanism that transmits the driving force of the motor during loading. When rotated in the direction of the arrow in FIG. 1 (A) by the means, the trailing unit 1 is pinned by the biasing force of the first spring (not shown) until just before the loading shown in FIG. The tape T is pulled out from the supply reel R while being entrained by the loading ring 7 while maintaining the expanded state regulated by the engagement between the slot 1e and the slot 1b.
Particularly, in the state shown in the figure, since the trailing loading unit 1 of the tape T is in the expanded state, the tape T is loaded while being temporarily stored, and the tape T is tensioned in this state. Is given. In carrying out the present invention, it is not necessary to continuously perform the loading while accumulating the record carrier (tape) as described above, and it is sufficient to perform the loading at one time point during the loading operation, and the time point is the first time. Immediately before the end of loading shown in FIG.

When the loading ring 7 further rotates beyond the position shown in FIG. 1 (A), the cam follower portion 2b of the pressing lever 2 acts on the concave portion 7a of the loading ring 7 by the action of the second spring.
Then, the lever 2 rotates in the counterclockwise direction. As a result, the pin 2a at the tip of the lever 2 is located on the side surface of the trailing unit 1.
1a is pressed and the unit 1 is rotated clockwise against the bias of the first spring. During this time, the leading and trailing units 3, 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 (B), the tape T stored by the trailing unit 1 being in the expanded state shown in FIG. 1 (A) is the preceding unit. Pulled out by 3.

In this way, in the process of shifting from the state of FIG. 1 (A) to the state of FIG. 1 (B), the drawing amount of the tape T by the movement of the preceding unit 3 in the loading direction is shown in FIG. The surplus generated by the clockwise rotation of the succeeding unit 1 of the tape loop shown in the figure is filled, and the tape T is hardly pulled out from the cassette C during this period.

FIG. 2 corresponds to FIG. 4 and shows the tape withdrawal amount in the embodiment of the present invention shown in FIG. In Fig. 2, as compared with Fig. 4, the amount of excessive pull-out after the loading ring 7 was stopped (on the right side of α _{1 in} the figure) was extremely small (almost no), and the tape dropped from the post due to excessive pull-out. There is no risk of damage. In the embodiment shown in FIG. 1, the tension is applied to the tape T in the state shown in FIG. 1A and the tape T is already stable. Therefore, the conventional tension detecting arm (5 in FIG. 3) is used. It does not take a long time for the tape to stabilize because of the damping of the tension detecting arm 5 unlike the excessive pull-out absorbing means.

The two-dot chain line in FIG. 2 and FIG. 4 shows the amount of tape pulled out when the tape remaining amount in the supply reel is small. Generally, when the tape remaining amount becomes small, it depends on the weight of the tape roll or the like. Since the inertia is also small, the tape withdrawal amount is in the situation indicated by the chain double-dashed line. However, in the embodiment shown in FIG. 1, when the tape remaining amount becomes small as shown by x in FIG. The tape T is pulled out of the supply reel R in a small amount at a very low speed because the rotation speed of the tape increases. Also in this case, the main operation of tape loading is basically the same as that described above.

In the embodiment of FIG. 1, when unloading, the tape T is wound around the supply reel R by a reverse operation of the above-mentioned loading, from the state shown in FIG. 1B to the state shown in FIG. .

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

(Effect of the Invention) As described above, according to the present invention, loading is performed while storing the record carrier at least at a temporary point during the loading operation, and at least part of the amount of the record carrier pulled out from the time point to the end of loading. Since the record carrier is filled with the stored record carrier, it does not take a long time to stabilize the record carrier, and it is possible to prevent the record carrier from being excessively extended at the end of loading with a simple configuration. Further, unlike the conventional device, it is possible to prevent the record carrier from being excessively extended without using the tension detecting arm, and therefore, the present invention can be applied to a device having an electrically or non-contact record carrier tension detecting means.

[Brief description of drawings]

FIG. 1A is a plan view showing a state just before the end of loading of an embodiment of a record carrier loading device of the present invention,
FIG. 2B is a plan view showing the state at the end of loading, FIG. 2 is a diagram showing the amount of record carrier extension in the apparatus of FIG. 1, and FIG. 3A is a conventional record carrier loading apparatus. A plan view showing the state immediately before the end of loading,
FIG. 4B is a plan view showing a state at the end of loading similarly, and FIG. 4 is a diagram showing a record carrier extension amount in the apparatus of FIG. DESCRIPTION OF SYMBOLS 1: Trailing loading unit, 1e: Pin provided on the trailing unit 1, 2: Push lever, 2a: Action pin for the trailing unit 1, 2b: Cam follower part, 3: Leading loading unit, 7: Loading ring, 7a: concave portion thereof, 7b: slot provided in loading ring 7.

Claims (1)

[Claims] 1. A first tape pull-out member that pulls out a tape stored in a cassette and moves around a rotary drum; and a first tape pull-out member and the cassette when the tape is pulled out and loading is completed. A second tape pull-out member that guides the tape between the two, and the second tape pull-out member is erected and rotatably supported, and separates the second tape pull-out member from the rotary drum. A rotating member that is biased in the direction of rotation, a restricting member that restricts the rotating operation of the biased rotating member, and the rotating member that causes the second tape pull-out member to approach the rotating drum. And an operating member for rotating the rotating member against the bias, and the operating member rotates the rotating member against the bias at one point during the loading operation. The recording is characterized in that the first tape pull-out member moves so as to wind the slackened tape around the rotary drum as the second tape pull-out member approaches the rotary drum from the time point to the end of loading. Carrier loading device.