JPH08315482A - Disk playing device - Google Patents

Abstract

PURPOSE: To provide a disk playing device rapidly accessing a disk and effectively operating by loading plural access drives respectively independently operating and controlling their movement so that they do not interfere with each other. CONSTITUTION: An access drive selection part 9 instructs a first access drive part 6 to access a selected disk. In such a case, whether or not a second access drive part 7 interfere in positional is judged by an access drive position interference confirmation part 10. When it interferes, a control part 8 makes it move to the position dissolving the interference, and makes the instructed first access drive part 6 move to a selected disk position at a low speed to prevent collision. Further, the control part 8 controls so that the number of operation times of respective access drive parts are averaged, and the life and reliability of the device are not damaged. Thus, the access drive parts complement each other while respectively independently operating without being limited by each other, and an access time is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk playing device for playing a disk by taking out the disk from a stocker portion for removably storing a plurality of disks.

[0002]

2. Description of the Related Art A conventional disk playing device will be described below.

FIG. 5 is a block diagram showing the structure of this conventional disk playing device. In FIG. 5, reference numeral 1 is a stocker unit for removably storing a plurality of discs, 2 is a first drive unit for mounting and recording information on and reproducing information from a disc, and 3 is a second drive unit for recording and reproducing information on the disc. The drive units 4 are disc transport units that load and unload the disc from the stocker unit 1 and transport the disc between the stocker unit 1 and the first drive unit 2 or the second drive unit 3.

The operation of the disc playing device constructed as described above will be described below.

When recording and reproducing the information of the disc instructed in the stocker unit 1, the disc transport unit 4 moves the disc from the reference position to the position corresponding to the disc storage position in the stocker unit 1 of the disc and moves the disc. Stocker section 1
After that, the disc is conveyed to the position of the first drive unit 2, the disc is mounted on the first drive unit 2, and then returned to the reference position. In the first drive unit 2, recording / reproduction of the mounted disc is performed. When subsequently recording / reproducing information of the instructed disc, the disc is conveyed by the disc conveying unit 4 by the same operation as described above, and the disc is recorded / reproduced by the second drive unit 3.

[0006]

However, in the above-mentioned conventional configuration, recording / reproduction is started after the instruction disk is conveyed to the position of the first drive section 2 or the second drive section 3 by the disc conveying section 4. Therefore, there are many steps until recording / reproduction, and since the disc transport unit 4 moves from the reference position to the designated disc position to the drive unit, the movement distance is long and the time from the disc designation to the recording / reproduction start becomes long. was there. Further, even when there is a continuous access instruction to a plurality of discs, the disc transport unit 4 operates the first drive unit 2 by the same operation as described above.
Alternatively, since the second instruction disk is attached to the other drive section after the first instruction disk is attached to the second drive section 3 to perform recording / reproduction, there is two drive sections in particular, but the second disc is used. There is a problem that the time from the disc designation to the start of recording / reproducing on the instruction disc becomes long.

The present invention solves the above-mentioned problems of the prior art, from the designation of a disc to the start of recording / reproduction when recording / reproducing one disc at a time and continuously recording / reproducing a plurality of discs. An object of the present invention is to provide a disc playing device capable of shortening the time.

More specifically, in order to shorten the time until the start of recording / reproducing, first, the two drive units mounted for mounting are moved to the disc positions designated by the drive units themselves to access the disc. However, it is an object of the present invention to solve the following problems for smoothly and efficiently performing the operation at that time.

The first problem is to prevent two access drive units moving on the same track from colliding with each other. Operate smoothly without causing the two access drive units to collide.

The second problem is that the two access drive sections are operated without collision when they are moved,
The disk access time should be improved by further shortening the moving time.

A third problem is to efficiently operate the two access drive units so that they can complement each other without restricting their operation. And try to improve the disk access time.

A fourth problem is that the operation is prevented from being concentrated on one of the two access drive sections and the life of the apparatus is improved.
To improve reliability.

[0013]

In order to achieve the above-mentioned object, a disc playing apparatus according to a first aspect of the present invention is provided with a stocker portion for removably storing a plurality of discs and an access surface of the stocker portion. , First and second access drive units for recording or reproducing information by moving a parallel moving track and loading a disk taken out from the stocker unit,
A control unit that controls the operation of the first and second access drive units, and an access drive selection that selects an access drive unit that moves to the designated disk position according to the position of the designated disk in the stocker unit and the usage status of the two access drive units And an access drive position interference confirmation unit that confirms positional interference with another access drive unit when the selected access drive unit is moved, and the control unit controls the access drive unit that moves to the selected disc position. On the other hand, if the other access drive unit is in the interference position, move the other access drive unit in the direction to cancel the interference and move the selected access drive unit to the designated disk position at a speed lower than the moving speed of the other access drive unit. I was allowed to.

According to a second aspect of the present invention, there is provided a disk playing device as set forth in the first aspect.
After reaching the position where the other access drive unit does not interfere with the selected access drive unit, the selected access drive unit increases its moving speed.

In order to achieve the above-mentioned object, a disk playing device according to a third aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units And an access drive selection unit that selects an access drive unit to be moved to the instruction disk position according to the instruction disk position and the usage state of the two access drive units.
After the selected access drive unit starts moving to the designated disk position in the stocker unit, the other unselected standby access drive unit moves to a position corresponding to the disk in the center of the stocker unit and waits for operation. I chose

In order to achieve the above-mentioned object, a disk playing device according to a fourth aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units The position of the access drive selection unit that selects the access drive unit to be moved to the instruction disk position according to the instruction disk position of 2 and the usage state of the two access drive units and the position of the other access drive unit when the selected access drive unit is moved. It is equipped with an access drive position interference confirmation unit that confirms interference, and the selected access drive unit can After the start of the movement, the other unselected access drive unit in the standby state moves to a position corresponding to the disk in the center of the stocker unit and waits for operation. When the access drive unit that has already selected and is accessing the instruction disk is at the interference position, the other access drive unit moves to a position close to the access drive unit that is already accessing the disk and waits for operation.

In order to achieve the above-mentioned object, a disk playing device according to a fifth aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units And an access drive selection unit that selects an access drive unit that moves to the instruction disk position according to the instruction disk position and the usage state of the two access drive units, the access drive selection unit including first and second access drive units. Select the access drive unit that is closer to the instructed disk when each is in the standby state, and the control unit The access drive unit is controlled to access the instruction disk, and when one of the first and second access drive units continuously accesses the disk a predetermined number of times, the other access drive unit is prioritized a predetermined number of times thereafter. The access drive selection part now works so that the disk can be accessed.

In order to achieve the above-mentioned object, a disk playing device according to a sixth aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. A first and a second access drive section for recording or reproducing information by mounting a disc which is moved and taken out from the stocker section; and a control section for controlling the operation of the first and second access drive sections, The control unit controls to move the access drive unit closer to the instructed disc to access the instructed disc when each of the first and second access drive units is in the standby state, and controls the first and second access. If one of the drive units accesses the disc a predetermined number of times in succession, the other access drive unit is given priority over the subsequent number of times to access the disc. So as to control, in time, and so as to operate by moving stand from the initial position to a position corresponding to substantially the center of the disc stocker in its standby state the other Access drive unit for accessing the disk with priority.

In order to achieve the above-mentioned object, a disk playing device according to a seventh aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units And a disk storage storage section for storing the disk storage status of the disk storage section. The control section divides the range of the disk storage slot where the disk is actually stored in the stocker section into about two equal parts, and divides the range into about two equal parts. The position corresponding to the disk storage slot near the center of one of the ranges is set as the standby position of the first access drive unit, and the other range is divided into approximately two equal parts. The position corresponding to the disk receiving slot near centers so as to operate as a stand-by position of the second access drive section.

In order to achieve the above-mentioned object, a disk playing device according to an eighth aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units And an access drive selection unit that selects an access drive unit that moves to the instruction disk position according to the instruction disk position and the usage state of the two access drive units, and a disk storage storage unit that stores the disk storage status in the stocker unit, After the selected access drive unit starts moving to the designated disc position, the control unit waits for the other standby state not selected. Indeed disk access drive section in the stocker is to be operated to move standby at a position corresponding to substantially the center of the disk receiving slot range level of included disk receiving slot.

In order to achieve the above-mentioned object, a disk playing device according to a ninth aspect of the present invention has a stocker section for removably storing a plurality of disks and a moving track parallel to the access surface of the stocker section. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units , An access drive selection unit that selects an access drive unit that moves to the designated disk position according to the instruction disk position and the usage state of the two access drive units, and a disk storage storage unit that stores the disk storage status in the stocker unit are selected. Checking the position interference with another access drive unit when moving the access drive unit Checking the access drive position interference When one access drive unit is operating for recording or reproduction, the other access drive unit in the standby state is in the center of the range of the disc storage slot where the disc is actually stored in the stocker unit. When moving to the position corresponding to the disk storage slot and waiting for operation, if the access drive unit that is already accessing the designated disk at the operation standby position is at the interference position, the other access drive unit will already access the disk. The access drive unit is moved to a close position to wait for operation.

In order to achieve the above-mentioned object, a disc playing device according to a tenth aspect of the present invention comprises a stocker portion for removably storing a plurality of discs and a moving track parallel to the access surface of the stocker portion. Inside the stocker unit, the first and second access drive units that record and reproduce information by mounting the disc that has moved and taken out from the stocker unit, and the control unit that controls the operations of the first and second access drive units And an access drive selection unit that selects an access drive unit that moves to the instruction disk position according to the instruction disk position and the usage state of the two access drive units, and a disk storage storage unit that stores the disk storage status in the stocker unit, The access drive selection unit displays the command specified when the first and second access drive units are in the standby state, respectively. With selecting an access drive section closer to the click, control unit controls to access the instruction disk access drive unit selected determined, first
When one of the second access drive units continuously accesses the disk a predetermined number of times, the access drive selection unit operates so that the other access drive unit is preferentially accessed a predetermined number of times thereafter. In the standby state, move the access drive section that gives priority to disk access from the initial standby position to a position that corresponds to the disk storage slot in the center of the disk storage slot where the disk is actually stored in the stocker section. I made it wait.

[0023]

According to the present invention, the first access drive section and the second access drive section respectively perform recording and reproduction at the designated disk position in the stocker section. Then, the invention according to claim 1 uses the access drive unit selection unit
The access drive unit in a standby state closer to the instruction disk is selected and determined to access the instruction disk. Further, the access drive position interference confirmation unit determines whether or not the selected access drive unit positionally interferes with the other access drive unit when accessing the instruction disk. When the other access drive unit is at the interference position, the control unit retracts the other access drive unit and moves the selected access drive unit to the instruction disk position. The selected access drive unit is operated so as to move at a low speed.

According to the second aspect of the present invention, the access drive section selecting section selects and determines the access drive section in a standby state closer to the instruction disk so as to access the instruction disk. Further, the access drive position interference confirmation unit determines whether or not the selected access drive unit positionally interferes with the other access drive unit when accessing the instruction disk. When the other access drive unit is in the interference position, the control unit retracts the other access drive unit and moves one access drive unit to the instruction disk position, but the other access drive unit that is retracted at that time selects from the other access drive unit. The access drive unit is operated so as to move at a low speed. The instruction disk of the selected access drive unit is reached when the other access drive unit to be evacuated reaches a position where the selected access drive unit does not interfere even if it reaches the position for recording and reproducing the instruction disk. Increase the speed of movement to the position.

According to the third aspect of the present invention, the access drive section selecting section selects and determines the access drive section in a standby state closer to the instruction disk so as to access the instruction disk. After the selected access drive unit starts moving to the designated disc, the control unit moves the other access drive unit in the standby state to a position corresponding to the disc in the center of the stocker unit, and puts it in operation standby.

According to the fourth aspect of the present invention, the access drive section selecting section selects and determines the access drive section in a standby state closer to the instruction disk so as to access the instruction disk. After the selected access drive unit moves to the instructed disc position, the control unit moves the other access drive unit in the standby state to a position corresponding to the disc in the center of the stocker unit and puts it in the operation standby state. Regarding the position, the access drive position interference confirmation unit has already accessed the disc. If the access drive unit determines that the access drive unit is in the interference position, the other access drive unit is already accessing the disc. Move and wait for operation.

According to a fifth aspect of the present invention, when one of the first and second access drive units continuously accesses the disk a predetermined number of times, the control unit gives priority to the other access drive unit for the subsequent predetermined number of times. Control to access the disk.

In a sixth aspect of the present invention, the control section moves the priority access drive section according to the fifth aspect from the initial position to a position corresponding to the disk in the center of the stocker section in the standby state, and waits for operation.

According to a seventh aspect of the present invention, the disc storage position in the stocker unit is stored in the disc storage storage unit, and the control unit determines that the disc is actually stored in the stocker unit based on the data in the disc storage storage unit. The range of the disk storage slot is determined and the range of the disk storage slot is divided into about two equal parts, and the position corresponding to the disk storage slot at the center of one of the two divided parts is set to the first position. The operation drive standby position of the access drive unit and the position corresponding to the disk storage slot near the center of the other range of the approximately bisected range are set to the second position.
It is operated as the operation standby position of the access drive section.

According to an eighth aspect of the present invention, the disk storage position in the stocker section is stored in the disk storage storage section,
The control unit starts moving the first or second access drive unit selected by the access drive selection unit according to the position of the instruction disk to the instruction disk position, and
The range of the disk storage slot where the disk is actually stored in the stocker section is judged from the data in the disk storage section, and the other standby access is made to the position corresponding to the disk storage slot in the approximate center of the disk storage slot range. Move the drive part to stand by for operation.

According to the ninth aspect of the invention, first, the disk storage position in the stocker section is stored in the disk storage storage section. The control unit starts moving the first or second access drive unit selected by the access drive selection unit according to the position of the instruction disk to the instruction disk position. In addition, the range of the disk storage slot where the disk is actually stored in the stocker section is determined from the data in the disk storage section, and the other standby state is set at the position corresponding to the disk storage slot in the center of the range of the disk storage slot. The access drive unit of is moved to stand by for operation. At this time, if the access drive position interference confirmation unit determines that the access drive unit that is already accessing the designated disk at the operation standby position is in the interference position, the control unit already writes the access drive unit in the operation standby state to the disk. Move to a position near the access drive unit you are accessing and wait for operation.

In the tenth aspect of the present invention, first, the disk storage position in the stocker section is stored in the disk storage storage section. When one of the first and second access drive units successively accesses the disc a predetermined number of times, the access drive selection unit operates so that the other access drive unit is preferentially accessed a predetermined number of times thereafter. At this time, the control unit determines the range of the disc storage slot where the disc is actually stored in the stocker unit from the data in the disc storage storage unit, and determines the range of the disc storage slot. Is moved from the initial standby position to a position corresponding to the disk storage slot in the approximate center of (1), and operation standby is performed.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk playing device of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the structure of a disk playing device according to the first embodiment of the present invention, and FIG. 2 is an internal perspective view showing a part of the disk playing device according to the first and second embodiments of the present invention. It is a perspective view. In FIGS. 1 and 2, 1 is the same as the stocker unit 1 in FIG. 5 showing a conventional example, and a stocker unit for detachably accommodating a plurality of discs 5, 6 and 7 are close to a designated disc 5 in the stocker unit 1. The first and second access drive units 8 which mount the specified disc 5 taken out and record or reproduce information at the position where the disc 5 is taken out, and 8 are the first access drive unit 6 and the second access drive unit. 7 is a control unit for controlling the operation, 9 is an access drive selecting unit for selecting an access drive unit to be moved to the instruction disk position according to the instruction disk position in the stocker unit 1 and the use state of two access drive units, and 10 is a selection An access drive position interference confirmation unit for confirming positional interference with other unselected access drive units when the access drive unit is moved.

In FIG. 2, the stocker unit 1 stores a plurality of disks 5 for recording and reproducing information in a vertically stacked manner. The disk 5 is detachably accommodated in the direction of the first access drive unit 6 and the second access drive unit 7. The first access drive unit 6 and the second access drive unit 7 are connected to the disk 5 from the access side of the stocker unit 1.
Is taken out, the disc 5 is held, and information is recorded or reproduced at the position where the disc 5 is taken out. The first access drive unit 6 and the second access drive unit 7 move on common moving tracks 11 and 12 parallel to the stocker unit 1 for accessing the disks 5 accommodated in the stocker unit 1. The controller 13 houses a control unit 8, an access drive selection unit 9, an access drive position interference confirmation unit 10, a power supply and the like.

The operation of the disc playing device configured as described above will be described below. The first access drive unit 6 and the second access drive unit 7 are arranged at positions corresponding to the respective disks 5 near the respective centers, which divide the disk storage unit of the stocker unit 1 into two equal parts in the initial state. This position is the initial position of the first access drive unit 6 and the second access drive unit 7. In the initial state after power-on and reset operation,
When recording or reproducing the instructed disc 5, first, the access drive selection unit 9 determines whether the instructed disc position is in half the number of sheets that can be stored in the stocker unit 1, and the disc storage unit of the stocker unit 1 is determined. One of the first access drive unit 6 and the second access drive unit 7 arranged corresponding to each of the two divided. The selected access drive unit is assumed to be the first access drive unit 6. The first access drive unit 6 is then operation-controlled by the control unit 8 to move to the instruction disk position, removes the instruction disk 5 from the stocker unit 1, holds and holds it, and starts recording or reproducing information at that position.
Further, when the next disc 5 is instructed after the first disc recording / playback instruction, the access drive selecting unit 9 first judges the current use state of the access drive units 6 and 7, and determines which access drive units are not currently used. Select. In this case, the second access drive unit 7 is selected. The second access drive unit 7 is controlled by the control unit 8 to be moved to the designated disc position, and the disc 5 is taken out from the stocker unit 1 and mounted, and information is recorded or reproduced at that position.

At this time, when the moving access drive unit (second access drive unit 7) moves to the instructed disc position, it causes positional interference with the first access drive unit 6 that has already accessed the disc 5. The access drive position interference confirmation unit 10 confirms whether there is any. When it is in the position where it interferes, the control unit 8 moves the first access drive unit (first access drive unit 6) to a position where it does not interfere. At the same time, the next second access drive unit 7
Is moved to the indicated disc position. The moving speed at this time is the second speed from that of the retracted first access drive unit 6.
The moving speed of the access drive unit is set to low speed.

Further, the access drive unit that moves to the evacuation position moves to the evacuation position while continuing recording / reproducing of information.

After the control section 8 confirms that the first access drive section 6 which is retracted and moved has reached the position where it does not interfere with the disk access of the second access drive section 7, the control section 8
Increases the moving speed of the second access drive unit 7 to shorten the moving time to the designated disk position.

Next, the operation when only one access drive unit accesses the instruction disk and the other access drive unit remains in the standby state will be described. First, the access drive unit that is accessing the disk is assumed to be the first access drive unit 6. At this time, the control unit 8 moves the second access drive unit 7 in the standby state to a position corresponding to the disk storage position in the substantial center of the stocker unit 1, and puts the operation standby there. When moving to the operation standby position, the first access drive unit 6 that first accesses the disk
2 interfere with each other, the second access drive unit 7 moves to a position close to the first access drive unit 6 and waits for operation. When the disk access of the first access drive unit 6 is finished as it is, the initial access position is returned to the initial position. However, when the disk access instruction is issued before that, the access drive position interference confirmation unit 10 causes the first disk position and the first disk position After confirming the positional relationship of the access drive unit 6, the second access drive unit 7 moves the control unit 8 to the designated disk position.
To move by. When the first access drive unit 6 interferes with the movement, the second access drive unit 7 moves to the instruction disk position while retracting as described above.

There is a case where one of the access drive units continuously performs a recording or reproducing operation a predetermined number of times. At this time, the access drive selection unit 9 gives priority to the other access drive unit to access the next disk. This predetermined number of times is set to four in this embodiment. Further, at that time, the control unit 8 moves the other access drive unit to a position corresponding to the disk storage position substantially in the center of the stocker unit 1 in advance, and makes the operation standby there.

A second part which is different from the device of the above-mentioned embodiment
Examples of the above will be described below. FIG. 3 is a block diagram showing the configuration of a disk playing device according to the second embodiment, and FIG.
FIG. 4 is a schematic diagram showing a standby state of an access drive unit.

The device of this embodiment differs from the device of the first embodiment only in that a disk storage unit 14 is further added to the controller 13 in FIG. The operation will be described below.

The disc storage position in the stocker unit 1 is stored in the disc storage storage unit 14. The control section 8 determines the range of the disk storage slot 15 in which the disk 5 is actually stored in the stocker section 1 from the data in the disk storage storage section 14. At the time of starting the apparatus, the position corresponding to the disk storage slot 15 at the center of one of the two ranges obtained by dividing the range of the storage slot 15 into two is set as the operation standby position of the first access drive unit 6. Further, the position corresponding to the disk storage slot 15 near the center of the other range of the two ranges divided into about two is set as the operation standby position of the second access drive unit 7. As shown in the example of FIG. 4, some empty disk storage slots 15 at the bottom of the stocker unit 1 are set to the operation standby position without corresponding.

When recording or reproducing the instructed disc, the access drive selection unit 9 first divides the range of the disc storage slot 15 in which the disc 5 is actually stored in the stocker unit 1 into two equal parts. One of the first access drive unit 6 and the second access drive unit 7 arranged corresponding to each range is selected. The selected access drive unit is assumed to be the first access drive unit 6. The first access drive unit 6 is then operation-controlled by the control unit 8, moves to the instruction disk position, takes out the instruction disk from the stocker unit 1, holds and holds it, and starts recording or reproducing information at that position. After that, the control unit 8 moves the second access drive unit 7 in the standby state to the disk storage slot 15 located substantially in the center of the range of the disk storage slot 15 in which the disk 5 is actually stored in the stocker unit 1. Move to the corresponding position and wait for operation. When the first access drive unit 6 that is initially accessing the disk interferes when moving to the operation standby position, the second access drive unit 7 moves to a position close to the first access drive unit 6 and operates. stand by. When the disk access of the first access drive unit 6 is finished as it is, it returns to the initial operation standby position, but when a disk access instruction is issued before that, the access drive position interference confirmation unit 10 determines the position of the specified disk. After confirming the positional relationship of the first access drive unit 6,
The access drive unit 7 is moved to the instruction disk position by the control unit 8. When the first access drive unit 6 interferes with the movement, the second access drive unit 7 moves to the designated disk position while retracting the first access drive unit 6 as described in the first embodiment.

There is a case where one of the access drive units continuously performs a recording or reproducing operation a predetermined number of times. At this time, the access drive selection unit 9 gives priority to the other access drive unit to access the next disk. This predetermined number of times is set to four in this embodiment. Further, at that time, the control section 8 corresponds the other access drive section to the disk storage slot 15 located substantially in the center of the range of the disk storage slot 15 in which the disk 5 is actually stored in the stocker section 1 in advance. Move to the specified position and wait for operation there.

As described above, according to each of the disk playing apparatuses of the second embodiment of the present invention, the first access drive section 6 and the second access drive section 7 are located at the positions where the disks 5 are taken out from the stocker section 1, respectively. Since recording, playback, and performance can be performed with, there is no extra process such as the disc transport process to the fixed drive section unlike the conventional example, and the time from the designation of the disc to the start of recording or playback can be shortened. it can. Further, it has two access drive units and can be operated independently to record and reproduce information on two discs at the same time. The two access drive units can be continuously switched and operated, and the access can be instantaneously switched from one disc on one access drive unit to the next disc on the other access drive unit.

Further, according to the first embodiment, the moving speed of the access drive unit for accessing the instruction disk is set lower than the moving speed of the access drive unit to be retracted due to interference, so that the control unit has two access drives. Even if the parts start moving almost at the same time, they will not collide because of this speed difference. Since there is a difference in speed in the same direction, there is always a space between the access drive units, and collision does not occur.
Further, as compared with the case of moving at the same speed, it is not necessary to always check the respective positional relationships to prevent a collision during the movement, so that the control is simple and reliable. In case of moving at the same speed, it is necessary to always check the positional relationship between the two access drive units because the two access drive units are moving and the two position information always changes. To complicate. By providing a speed difference, a smooth operation can be obtained, which in turn speeds up.
Compared to “moving the second access drive unit 7 to the instruction disk position after retracting the first access drive unit 6 for reliable collision prevention”, since both access drive units can start moving at substantially the same time, The time to start recording / playback on the disc can be shortened.

First, the moving speed of the access drive unit for accessing the instruction disk is set to be lower than the moving speed of the access drive unit to be retracted due to interference, and even if the former access drive unit reaches the instruction disk recording / reproducing position. When the access drive unit on the evacuation side reaches the position where there is no interference, the speed of movement of the former access drive unit to the instruction disk position is increased, so there is no collision to the instruction disk position. The traveling time can be shortened. As described above, when the two access drive units move, the two position information of the two access drive units always changes, so it is complicated to make the operation of the control unit complicated by always checking the positional relationship between the two access drive units. By making the judgment of the control unit that the retracted access drive unit has reached a position where it does not interfere, if the moving speed of the access drive unit moving to the instruction disk is increased, the control unit will check the respective positional relationships. However, it is not necessary to move the robot, the control is simple and reliable, and there is no collision. In addition, the speed is increased to shorten the traveling time.

When one of the access drive units is in operation, the control unit moves the other access drive unit in the standby state to the center of the stocker unit and puts it in the operation standby state, so that the next disc recording / reproducing instruction is given. In this case, the moving distance to the pointing disk can be reduced on average, and the time to move to the pointing disk position can be reduced on average.

When one of the access drive units is in operation, the control unit moves the other access drive unit in the standby state to the center of the stocker unit to wait for the operation. When it is determined that the operating access drive unit is at the interference position, the other access drive unit is moved to a position close to the operating access drive unit and placed in an operation standby state, so that recording or reproduction on the next disc is performed. When there is an instruction, the movement distance to the instruction disc can be reduced on average, and the time to move to the instruction disc position can be reduced on average.

When one of the first and second access drive units continuously accesses the disk a predetermined number of times, the other access drive unit is preferentially accessed a predetermined number of times thereafter so that the disk is accessed by two units. The number of operations of the access drive unit can be averaged to some extent without being biased to one side, and the number of times of service of the device can be improved. If the operation of the access drive unit on one side is biased, the service life of the access drive unit on one side stipulates the service life of the device, but by distributing the operation, the service life of the device is improved and reliability is improved. improves.

When one access drive unit is operated continuously a predetermined number of times and the other access drive unit is prioritized to be operated a predetermined number of times thereafter, the priority access drive unit is set to a substantially central position of the stocker unit. Since it moves from the initial position and waits for operation, the moving distance to the instruction disk can be reduced on average when recording or reproducing to the next disk, and the time to move to the instruction disk position can be averaged. In addition to being shortened, the number of operations of the two access drive units can be averaged to some extent without being biased to one side, and the number of times of service of the device can be improved.

Further, according to the second embodiment, the range of the disk storage slot 15 in which a disk is actually stored in the stocker section is divided into about two equal parts, and the operation standby of the two access drive sections is set in each range. By making the positions correspond to each other, the moving distance of the first access drive unit 6 and the second access drive unit 7 to the instruction disc can be shortened, and the time from the disc designation to the recording / reproducing start can be shortened. You can In addition, since the operation standby position is set according to the range in which the discs are actually stored in the stocker unit, the range where the discs are not stored can be set when the discs are not stored in the entire stocker unit. Do not set to the covered operation standby position. Therefore, the moving distance to the pointing disk can be shortened, and the time to move to the pointing disk position can be shortened. Also, if the initial drive standby position of the access drive unit is arranged corresponding to each half of the stocker unit and the access drive unit closer to the instruction disc accesses the instruction disc, the disc is not stored in the entire stocker unit. When the disk storage range is deviated to one side, the operation of the access drive unit may concentrate on one side, but this can be improved by setting the operation standby position corresponding to the actual disk storage range. The number of operations of the two access drive units can be averaged, and the life of the device can be improved.

While one of the access drive units is in operation, the other access drive unit in the standby state is made to stand by for operation at approximately the center of the actual disk storage range of the stocker unit.
When there is a recording or reproducing instruction to the next disc, the movement distance to the instruction disc can be reduced on average, and the time to move to the instruction disc position can be reduced on average.

When one of the access drive units is in operation and the other access drive unit in a standby state is placed in an operation standby state at approximately the center of the actual disk storage range of the stocker unit, the access drive unit in operation with respect to the operation standby position. If it interferes, move the access drive unit in the standby state to a position close to the operating access drive unit and wait for the operation so that when the recording or reproducing instruction to the next disc is given, The distance traveled can be reduced on average.

When one of the access drive units operates continuously for a predetermined number of times, the other access drive unit is prioritized for a predetermined number of times thereafter, and the priority access drive unit is actually stored in the stocker unit. Since it moves from the initial standby position to the operation standby position in the approximate center of the range, the moving distance to the instruction disk can be reduced on average when the next disk is instructed to record or play, and the operation moves to the instruction disk position. It is possible to shorten the time required for averaging and to average the number of times of operation of the two access drive units, thereby improving the number of times the device is used.

[0058]

As described above, according to the present invention,
Since there is no extra process such as a disc transport process to the fixed drive unit, the time from the disc designation to the start of recording or reproduction can be shortened. It has two access drive units and can be operated independently to simultaneously record and reproduce information on two discs. The two access drive units can be continuously switched and operated, and the access can be instantaneously switched from one disc on one access drive unit to the next disc on the other access drive unit.

Moreover, according to the invention of claim 1,
Even if the control unit starts moving the two access drive units at substantially the same timing, they will not collide due to the speed difference. In addition, since it is not necessary to always check the positional relationship between each other to prevent collision during movement, control is simple and reliable. Compared to “moving the second access drive unit to the designated disc position after retracting the first access drive unit for reliable collision prevention”, both access drive units can start moving almost at the same time. The time to start recording / playback of can be shortened.

According to the second aspect of the present invention, the control can be performed easily and surely, there is no collision, the moving time to the designated disc position can be shortened, and the time from the designation of the disc to the start of recording or reproduction can be reduced. It can be shortened.

According to the third aspect of the invention, when one access drive unit is operating, the moving distance of the other access drive unit to the instruction disk can be reduced on average.
The time required to move to the designated disk position can be shortened on average. It is possible to shorten the time from the disc designation to the start of recording or playback.

According to the fourth aspect of the invention, the moving distance to the designated disc can be reduced on average, and the time from the disc designation to the start of recording or reproduction can be shortened.

According to the fifth aspect of the present invention, the number of operations of the two access drive units can be averaged, the number of times the device is used is improved, and the reliability is improved.

According to the invention described in claim 6, the time required to move to the designated disk position of the access drive unit can be shortened on average, and the number of operations of the two access drive units can be averaged to some extent. The number of times is improved and reliability is improved.

According to the seventh aspect of the invention, the moving distance of the two access drive units to the instruction disc can be shortened, and the time from the disc designation to the start of recording / reproducing can be shortened. The operation of the access drive unit is not concentrated on one side, the number of operations of the two access drive units can be averaged, the number of times of use of the device is improved, and the reliability is improved.

According to the invention described in claim 8, when one access drive unit is operating, the moving distance of the other access drive unit to the instruction disk can be reduced on average.
The time required to move to the designated disk position can be shortened on average. It is possible to shorten the time from the disc designation to the start of recording or playback.

According to the invention described in claim 9, the moving distance to the designated disc can be reduced on average, and the time from designation of the disc to start of recording or reproduction can be shortened.

According to the tenth aspect of the invention, the time required to move the access drive unit to the designated disk position can be shortened on average, and the number of operations of the two access drive units can be averaged to some extent. The number of times is improved and reliability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a disk playing device according to a first embodiment of the present invention.

FIG. 2 is an internal perspective view showing a part of the disk playing device according to the first and second embodiments of the present invention.

FIG. 3 is a block diagram showing a configuration of a disk playing device according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram showing a standby state of an access drive unit of a disk playing device according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a conventional disc playing device.

[Explanation of symbols]

 1 stocker unit 2 first drive unit 3 second drive unit 4 disc transport unit 5 disc 6 first access drive unit 7 second access drive unit 8 control unit 9 access drive selection unit 10 access drive position interference confirmation unit 11, 12 Trajectory 13 Controller 14 Disk storage storage 15 Disk storage slot

Claims (10)

[Claims] 1. A stocker unit for removably accommodating a plurality of discs and a disc taken out from the stocker unit by moving a moving track parallel to the access surface of the stocker unit to record or reproduce information. First and second access drive units, a control unit for controlling the operations of the first and second access drive units, an instruction disk position in the stocker unit, and an instruction disk position depending on the usage states of the two access drive units. An access drive selection unit for selecting an access drive unit to be moved to, and an access drive position interference confirmation unit for confirming positional interference with another access drive unit when the selected access drive unit is moved, , When another access drive unit is in the interference position with the access drive unit that is selected and moves to the indicated disc position. If the other access drive unit is moved in a direction to eliminate interference, the selected access drive unit is moved to the instruction disc position at a speed lower than the moving speed of the other access drive unit. 2. The selected access drive unit increases its moving speed after reaching a position where another access drive unit does not interfere with the selected access drive unit moving to the designated disc position. The disc playing device according to claim 1. 3. A stocker section for detachably accommodating a plurality of disks, and a disk taken out from the stocker section by moving a parallel moving track with respect to an access surface of the stocker section are mounted to record or reproduce information. First and second access drive units, a control unit for controlling the operations of the first and second access drive units, an instruction disk position in the stocker unit, and an instruction disk position depending on the usage states of the two access drive units. The access drive selection unit for selecting the access drive unit to be moved to is provided, and after the selected access drive unit starts moving to the designated disk position in the stocker unit, the other access drive unit in the standby state not selected is in the stocker unit. The disk is characterized by moving to a position corresponding to the disk storage slot in the approximate center of the disk and waiting for operation. K playing device. 4. An access drive position interference confirmation unit for confirming positional interference with the other non-selected access drive unit when the selected access drive unit is moved, and the selected access drive unit performs recording or reproduction. When the other access drive unit in the standby state moves to the position corresponding to the disk storage slot in the substantial center of the stocker unit and waits for operation, the instruction disk already selected for the operation standby position 4. When the access drive unit that is accessing the disk is at the interference position, the other access drive unit moves to a position near the access drive unit that is already accessing the disk and waits for operation. Disc playing device. 5. A recording / reproduction of information is carried out by mounting a stocker section for removably accommodating a plurality of disks and a disk taken out from the stocker section by moving a parallel moving track with respect to an access surface of the stocker section. First and second access drive units, a control unit for controlling the operations of the first and second access drive units, an instruction disk position in the stocker unit, and an instruction disk position depending on the usage states of the two access drive units. An access drive selecting unit that selects an access drive unit to be moved to, and the access drive selecting unit is closer to the disc instructed when the first and second access drive units are in the standby state, respectively. At the same time as selecting a part, the control part accesses the selected access drive part to the instruction disk. When one of the first and second access drive units controls the disk for a predetermined number of times in succession, the access drive selection unit operates so that the other access drive unit gives priority to the disk access for a predetermined number of times thereafter. A disc playing device characterized by: 6. The control unit moves the other access drive unit, which preferentially accesses the disc, in a standby state from the initial standby position to a position corresponding to the disk storage slot in the substantial center of the stocker unit, and makes the operation standby. 6. The disc playing device according to claim 5, wherein: 7. A stocker unit for removably storing a plurality of discs, and a disc taken out from the stocker unit by moving a parallel moving track with respect to an access surface of the stocker unit to record or reproduce information. The control unit includes first and second access drive units, a control unit that controls operations of the first and second access drive units, and a disk storage storage unit that stores a disk storage status in the stocker unit. In the stocker section, the range of the disk storage slots in which the disks are actually stored is divided into about two equal parts, and the position corresponding to the disk storage slot near the center of one of the two divided parts is located. A position corresponding to a disk storage slot near the center of the other range of the above-mentioned approximately two halves as the standby position of the first access drive unit Is operated as a standby position of the second access drive section. 8. A recording / reproducing of information is carried out by mounting a stocker section for removably accommodating a plurality of disks and a disk taken out from the stocker section by moving a parallel moving track with respect to an access surface of the stocker section. First and second access drive units, a control unit for controlling the operations of the first and second access drive units, an instruction disk position in the stocker unit, and an instruction disk position depending on the usage states of the two access drive units. An access drive selection unit for selecting an access drive unit to be moved to and a disk storage storage unit for storing the disk storage status in the stocker unit, and the control unit starts moving the selected access drive unit to the instructed disk position. Then, set the other access drive unit in the standby state to the disc storage unit where the disc is actually stored in the stocker unit. A disc playing device characterized in that it is moved to a position corresponding to a disc storage slot substantially in the center of the storage slot range and put into operation standby. 9. An access drive position interference confirmation unit for confirming positional interference with the other unselected access drive unit when the selected access drive unit is moved, and the selected access drive unit performs recording or reproduction. When the other access drive unit in the standby state moves to the position corresponding to the disk storage slot in the center of the disk storage slot where the disk is actually stored in the stocker, and is waiting for operation. In the case where the access drive unit that is already accessing the designated disk is in the interference position with respect to the operation standby position, the other access drive unit moves to a position near the access drive unit that is already accessing the disk and waits for operation. 9. The disc playing device according to claim 8, wherein: 10. A disk storage storage section for storing the disk storage status of the stocker section, wherein the control section stores the disk in the stocker section while the access drive section for prioritizing disk access is in a standby state. 6. The disc playing device according to claim 5, wherein the disc playing device is moved from an initial standby position to a position corresponding to a disc storing slot substantially in the center of the range of the disc storing slots, and made to stand by for operation.