JPS62195759A - Disk loading and ejecting device - Google Patents

Abstract

PURPOSE:To timely attain the access of front/rear sides and to reduce the access time at program search by seeking the next request disk while a preceding requested disk is reproduced or read. CONSTITUTION:A read/write recording or reproducing means is arranged in a cylindrical carrousel 10, and if storage means A... of, e.g., n-set of disks 8 exist in the carrousel 10, a reproducing (recording) medium (disk) is loaded only to n/2 sets of storage means among n-set of disk storage means A.... Then the disk storage means on an opposite line of the disk storage means loaded with the disk 8 is made vacant and at the time of the preceding disk is in read or recording (R/W) state, the next request disk is arranged at a prescribed location and while the preceding disk is ejected, the next request disk is loaded. Further, a means turning the carrousel 10 by 180 deg. is provided so as to apply R/W to both the front and rear sides of the disk.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to compact discs (CDs), video discs (Vr)), or read-only memory CDs (RO
The present invention relates to a loading and unloading device for discs such as M, CD, etc., and particularly to a disc loading and unloading device that can shorten access time and perform playback or recording on the front and back sides of the disc.

[Summary of the invention]

The present invention is aimed at shortening the loading and unloading time of disks when reading or recording (R/W) a plurality of disks stored in a carousel type disk storage section.
A search is made for the next disk to be read/written after the disk being written, and the disk is loaded and ejected at the same time, and the front and back sides of the disk are read/written.
The present invention relates to a disk loading and ejecting device that performs the following operations.

[Conventional technology]

Recently, playback devices using digital audio discs (■)AD) have been commercially available, and optical pink amplifiers have been used to reproduce T)AD.
It has become possible to extremely shorten the access time when randomly accessing the information inside. However, in order to store more information in memory, a large number of the above-mentioned disks are arranged, a plurality of these disks are selected and brought to the reproducing means, and predetermined information is randomly selected from the disks of the reproducing means. For record players and the like, an automatic performance device called a record player has been proposed. These automatic performance devices use a storage device called a carousel, in which playback media such as disks, cassettes, or slide films are arranged radially within a cylindrical disk storage chamber. The car cell has a drive shaft connected to a drive motor at its center, and is configured to stop a predetermined reproduction medium at a reproduction means position, and then take it out of the car cell and reproduce it.

A conventional structure for inserting or ejecting a playback medium into the car cell as described above is as shown in FIG.
A plurality of radial partition plates (2) are provided in the interior of the 1, and the outer peripheral wall (3) is provided with a reproduction (recording) medium such as a cassette (4).
) is provided with an insertion port (5) for inserting the radiation partition 48+6.
1, a reproducing (recording) medium (4) clamped to a conveying device (7) was loaded and discharged.

[Problem that the invention seeks to solve]

According to the above conventional configuration, the R of the reproduction (recording) medium (4)
/W, first rotate the car cell (1) and transfer the specified playback (recording) medium (4) to the conveyor W (7).
The transport device w (7) is operated to eject the specified reproduction (recording) medium (4) from the car cell (11), and after loading it into the recording and reproduction device position, /W is performed. During this time, the car cell +11 remains as it was, and after the read/write of the reproduction (recording) medium (4) is completed, it is returned to the original position of the car cell from which it was taken out. This causes the access time to become longer.
It was difficult to shorten random access time.

[Means for solving problems]

The present invention has been made in view of the above-mentioned drawbacks, and its means include a cylindrical car cell capable of storing a plurality of disks, and a recording or reproducing device provided in the central space of the car cell. and half the number of disks that can be stored in the carousel are stored in the holding means, and at the same time the selected disk is loaded into the recording or reproducing means from the stored disk side and the recording or reproducing means is in a reproducing or recording state. A means for ejecting and storing a disc into an empty holding means in which no disk is stored, a means for loading the ejected and stored disc into the empty holding means side from the side from which it was ejected, and a means for storing a disc in a playing state. storage means for storing the address state of the holding means for the ejected or loaded disk; and a storage means for storing the address state of the holding means for the ejected or loaded disk; The car cell is 18 in the horizontal plane passing through the center of rotation of the cell
1. A disk loading and ejecting device characterized by comprising means for rotating the disk by 0 degrees.

[Operation] In the present invention, a recording or reproducing means for reading or writing is provided in a cylindrical car cell, and a holding means for, for example, n discs is provided in this car cell. Then, out of the holding means for n disks, only n/2 holding means are loaded with reproduction (recording) media (hereinafter referred to as disks), and these disks are on the opposite line to the disk holding means loaded with them. leave the disk holding means empty;
When the previous disk is R/W, the next request disk is located (arranged) at a predetermined position, and when the previous disk is rejected, that is, ejected, the next request disk is loaded. In fact, the front and back sides of the disc can be read/written separately.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 is the principle system diagram of the present invention, Figure 2 fal ~ (0)
is a route map for explaining access to the car cell of the present invention.

In FIG. 1, the car cell (10) is different from the example in FIG. and a disk (8) arranged concentrically within the carcell (10).
If there are a total of n holding means capable of storing the discs (8), only n 72 discs (8) can be stored.

The other n/2 holding means are empty shelves. 1st
In the example shown in the figure, the following four holding means shown as (a), (b), (c), and (d) each hold the disk (8), which is placed on the holding means shown as (c). The disc (8) can be played back (or read out) or recorded, and the other disc (A), (
The following four holding means shown in B), (C), and (D) are empty shelves.

(11) is a holding means (a) for the car cell (10).

(b), (c), (d) and (A), (B).

(C), (r)), etc., and by rotating the car cell (10), the address etc. of each holding means sensed by the address sensor (11) can be detected by rotating the car cell (10). It is read out using an address counter (17). The car cell (10) is rotated by a motor (18) via a bell (IOA).
The rotation angle is ±90°, and the A side of each disk (8) (
Then select the 8th side (back side) of the disk (8) at a position of 180°±90°. Desired disk (8
) from the corresponding holding means and playback or recording means (
9) is loaded onto the turntable (9A), and the disc (9) that has been reproduced or recorded by the reproduction or recording means (9)
The loading/discharging mechanism (13) for discharging 8) has a rank (15) on the lower surface of one end thereof. This rack (15) is
It meshes with a pinion (14) pivotally mounted on the shaft of a motor (16) that drives the loading/unloading mechanism (13). Therefore, this mechanism (13) reciprocates in the horizontal direction indicated by (X-X') in the figure, and its reciprocating plane substantially coincides with the plane of the turntable (98). Further, the clamping means for taking out the disc (8) from the disc holding means, clamping it to the reproducing or recording means (9), and clamping and ejecting the disc (8) from the reproducing or recording means (9) is the loading and discharging mechanism. (13) is attached, although not shown, by means of commonly used clamping means.

(19) is a drive circuit that drives the motors (16) and (18), and this is a control circuit (2) such as a computer.
0). The output of the address power counter (17) is applied to the control circuit (20). Commands from the input device f (21), such as an operation console, are stored in the request memory (
22) and applied to the control circuit (20).

(23) is a buffer amplifier for the swap address memory, which drives the swap address memory (24). This swap address memory (24) is managed in the form original address-current address, and the command from the input word ff (21) always points to the original address of the disk (8). Further, the command from the input device (21) has a code number indicating the front and back sides of the disc (8).

The operation of the disk loading and unloading device constructed in this way will be described in detail with reference to FIG. 2+al~(0).

First, in the state of FIG. 2+al, the car cell (10) is
The following four holding means (a), (b), and (c).

(D), the disks (8) are held respectively, and the other following 4 disks (8) are held respectively.
holding means (A), (B), (C), (
D) does not hold a disk (8). That is,
Only the next half of the holding means holds the disc (8).

Input device in this state! (21), for example, the front side of the disk (8) on the holding means (A) (hereinafter, each disk (8) is given the code of the original holding means, and the front side is marked (A), and the back side is (B) is attached) (8a)
When you request the conversion, the car cell (10) will be
As shown by the arrow (al) of a+, the motor (18) rotates the disk (8a) in the clockwise direction as shown in Fig. 2 (
The horizontal position is reached as shown in b). At this time, the address of the disk (8A) detected by the address sensor (11) is "
” through the address counter (17) to the control circuit (
In addition to step 20), the motor (1B) of the car cell (10) is stopped via the drive circuit (19). Next, the control circuit (20) and the drive circuit (19) control the motor (16).
) is rotated counterclockwise, and the loading/unloading mechanism (13) brings the disk (8A) toward the reproducing or recording means (9) as shown in FIG. 2 (C1). As shown in (d), the disc (8A) is placed on the turntable (9^) of the reproduction or recording means (9) and the reproduction or recording state is entered.During this time, the input device ff ( For example, the disk (8haA) of the next holding means (c) requested in step 21)
was brought to the position of the loading/unloading mechanism (13), and the carousel ('10) was rotated counterclockwise (a2). That is, the loading and discharging mechanism (1
3) is moved in the (X') direction, and then the carousel (
10) rotates in the direction of the arrow (a2), rotates the next request disk (8cA) to the position shown by +dl in FIG. 2, and stops.

Next, when the playback or recording of the disc (8A) that was in the playback or recording state is completed, the loading/unloading mechanism (13) is opened (
The control circuit (20) gives a control signal to the drive circuit (19) to rotate the motor (16) counterclockwise so as to move in the X) direction.

Then, the clamping means of the loading/discharging mechanism (13) simultaneously clamps the disks (8A) and (8A), and as shown in FIG.
As shown in 8), the disc (8A) is ejected into the empty holding means (C1), and the disc (8A) is loaded onto the turntable (9A) of the reproducing or recording means (9). Therefore, the address of the disk (8A) changes to "C".

Figure 2 (fl is a disk (8cm) recorded (hereinafter referred to as R/
During this time, for example, the input device (
In order to select the next requested disk (80A) in step 21), the control circuit (20) operates through the request memory (22) and rotates the motor (18) through the drive circuit (19). A state in which the carousel (10) is rotated in the direction of arrow (a3) and stopped at a predetermined designated position based on the address sensor (11) is shown.

Next, as shown in Figure 2+gl, the disk (8 ha A)
is ejected into the empty holding means (B), and the disc (8
The address of disk A) becomes B'', and the address of disk (80
A) is the turntable (9) of the reproduction and recording means (9).
8) loaded on top. While this disk (80A) is being read/written by the reproducing and recording means (9), as shown in FIG.
As shown in hl, move the car cell (1) in the direction of arrow (a4).
0) and then the next request disk (8A)
Select. The disk (8A) is at the original address “A”
However, since the address is "C", by giving an instruction to the control circuit (20) using the swap address memory (24), the motor (18) is set to the car cell (10).
, rotate it counterclockwise as shown by the arrow (a4) in FIG. At a position where the means (9) is on the same plane as the turntable (9A),
Stop the car cell (10).

Next, as shown in FIG. 2 (1), the reproducing or recording means (9
), the disc (8A) is loaded from the holding means (C) from the left to the right, opposite to the gold salt, and the disc (8A) is loaded onto the turntable (9A) of the playback or recording means (9). ) is ejected to the holding means (c). As a result, the address of the disk (80A) becomes 'c'. All these translations are done in the swap address memory (24) to rotate the car cell (10) with the current address type. .

Next, for example, when the front side (8A) of the disc (8A) is in the playback or recording state, the carousel (10) must be turned to bring the next request disc to the horizontal position. , at this time, the address of the next request is the back side (8A) of the disc (8A) that is currently being played or recorded.
8A B), as shown in FIG. 2 0), during recording and reproduction of the disk (8A), the carousel (10) is rotated so that the holding means facing each other, both of which are empty shelves, are mounted. (A)
Select and (a) and keep both in the horizontal position.

Next, as shown in FIG. 2 (kl), a reproducing or recording means (9
) on the turntable (9^) with the holding means (A> or (a), in this example holding means (A)
eject it. Next, the car cell (10) is rotated 180 degrees as shown in FIG. 2C, and the holding means (A) is brought to the position of the holding means (A). In this state, the front and back sides of the disc (8B) are reversed, and reproduction or recording on the back side (8B) is possible.

Next, as shown in FIG. 2 fml, the disk (8B) is loaded onto the turntable (9A) of the reproducing or recording means (9). In the R/W state of the disk (8B), the second
As shown in Figure (n), the front side (82A) of the next riff-est disc (82) is brought into the same plane as the horizontal plane of the turntable (9A) of the reproducing or recording means (9). ,
As shown in Figure 2 (n), the R/W of the disk (8B)
At the end of the process, as shown in Figure 2 (0), the disc (8
Loading of 2A) and gluing of the disc (8B) are performed simultaneously.

In the above, the disk is 8A → 8HAA → 80A → 8
We have explained the case where A → 8 B → 82 A is selected. For example, in a car cell (10) where 100 disks can be arranged, 50 disks are randomly selected, and if the access time is extremely fast, 1 disk is selected. You can select the desired disc. The conditions shown in FIG. 2+a) to (0) are summarized in a table for easy understanding as shown in Table 1 below.

Table 1 Of course, in order to perform the above operation, in addition to the decimal number consisting of the order number of the request, D,... The request number is determined by the first order arrangement.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to search for the next requested disc while the requested disc is being played or read, thereby making it possible to significantly shorten the access time when searching for the beginning. . Furthermore, the front and back sides can be accessed in a timely manner, making it possible to increase the capacity.

In addition, since it is sufficient to rotate the carousel, which has a moment of inertia, by 90 degrees over ±180 degrees, the motor (18) can be made small and the stopping position accuracy can be easily achieved.

[Brief explanation of drawings]

Fig. 1 is a system diagram of the disk loading and ejecting device of the present invention, Fig. 2 +a) to (0) is a car cell route diagram for explaining the disk loading and ejecting states of the present invention, and Fig. 3 1 is a partially cutaway perspective view of a car cell for explaining a conventional car cell loading/unloading method; FIG. In the figure, (10) is a car cell, (11) is an address sensor, (17) is an address counter, (20) is a control circuit, (21) is an input device, (22) is a request memory, and (24) is a control circuit. ) respectively indicate swap address memory.

Claims (1)

[Scope of Claims] A cylindrical carousel capable of accommodating a plurality of discs, a recording or reproducing means provided in a central space of the carousel, and half the number of discs that can be stored in the carousel. is stored in the holding means, and the selected disk is loaded into the recording or reproducing means from the stored disk side, and at the same time, the disk in the playing or recording state is ejected and stored in the empty holding means in which no disk is stored. means for loading the disc ejected and stored on the side of the empty holding means from the ejected side, and ejecting and storing the disc in the playing state into the holding means on the side where the disc is stored; and the ejecting or loading. storage means for storing the address state of the holding means for the disc that has been loaded; and means for determining whether the front or back of the disc is input and rotating the carousel by 180° within a horizontal plane passing through the center of rotation of the carousel. A disc loading and ejecting device comprising: