JP2009271950A - Disk unit and failure detecting method of disk unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk unit which detects a disk between a stocker and a stocker and ejects the disk. <P>SOLUTION: In this changer type disk unit, the unit has a plurality of stockers for holding a plurality of disks arranged in the thickness direction respectively, and a lifting mechanism raising and lowering a plurality of stockers. The unit is provided with: a disk storing part moving a disk selected by raising and lowering a stocker to a first height position; a driving unit reproducing or recording information for the selected disk positioned at the first height; and a control part for determining whether the stocker can be moved or not in the raising and lowering directions by raising and lowering a stocker when the disk affects a raising and lowering range, the disk is detected based on the determination result. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a slot-in type changer type disk device capable of reproducing or recording information on a disk such as a CD or a DVD and storing a plurality of disks in the apparatus, and an abnormality detection method thereof.

  In recent years, changer-type disk devices capable of storing a plurality of disks have become widespread as in-vehicle disk devices. In the case of the changer type, a slot-in method is used in which a disk inserted into the apparatus through a disk insertion slot is automatically transported to a predetermined position by a disk transport mechanism, and a plurality of disks are stored side by side in the thickness direction (vertical direction). A possible disc storage is provided.

  The drive unit including the optical pickup moves forward and backward between the drive position and the retracted position by a drive drive mechanism, and any one of the plurality of disks held in the disk storage portion is selective. When the drive unit is pulled out, the drive unit moves to the drive position to reproduce (or record) the disc. This type of changer-type disk device is described in Patent Document 1, for example.

  In the example described in Patent Document 1, as a disk storage portion, a plurality of stockers that can hold the outer peripheral edge of the disk over about a half circumference are arranged coaxially in a plurality of stages, and a plurality of feed screw members are inserted into each stocker. Screwed together. The feed screw members are formed with spiral grooves of unequal pitch, and the stockers are moved (lifted / lowered) in the axial direction by synchronously rotating these feed screw members.

  By the way, in such a disk device provided with a plurality of stockers, the disks may be sandwiched between the stockers. Therefore, when the stocker members are rotated synchronously to raise and lower each stocker, The stocker cannot be raised and lowered due to an obstacle, which may cause problems in the operation of the lifting mechanism.

  In this case, since the problem cannot be resolved unless the faulting disk is removed, the user requests repair. Further, when repairing, it is not known which disk is sandwiched where, so it takes a lot of time to eject the disk and restore it.

  Further, Patent Document 2 describes a changer-type disk reproducing device, in order to avoid a risk that a user inserts a finger when a lid provided at a disk insertion / ejection position is released. A device for urgently stopping the conveyance of a disk is described.

Further, Patent Document 3 describes a changer type disk device, which describes an example in which a plurality of disks are stored in a storage case, and a drive unit having an optical pickup or the like is moved up and down by a lifting device (lifting means). . However, the examples described in these patent documents do not describe a method for solving the problem that the disk cannot be moved up and down by being sandwiched between the stockers.
JP 2003-141809 A Japanese Patent Laid-Open No. 7-320383 JP 2001-210059 A

  In a conventional disk device having a plurality of stockers, a disk may be caught between the stockers, and when raising or lowering each stocker, the stuck disk becomes an obstacle and the stocker cannot be raised or lowered. There is a possibility that it will come, and further improvement is required.

  SUMMARY OF THE INVENTION In view of such circumstances, the present invention detects when a disk is sandwiched between the stocker and a disk device and an abnormality detection method for the disk device that can eject a disk that becomes an obstacle. The purpose is to provide.

  The present invention as claimed in claim 1 is a changer type disk device that selects and reproduces information by selecting any one of a plurality of disks, and holds the plurality of disks side by side in the thickness direction. A disk storage unit that moves the selected disk to a first height position by moving the stocker up and down, and a first height. A disk is sandwiched between the drive unit that reproduces or records information on the selected disk at a position and the stocker, and the sandwiched disk becomes an obstacle disk, limiting the ascending / descending range of the stocker In such a case, the stocker is moved up and down to determine whether it can move in the upward and downward directions, and the failed disk is detected based on the determination result. A control unit for, characterized by comprising a.

  Further, the present invention according to claim 6 is a change detection method for a changer type disk device that selects and reproduces information by selecting any one of a plurality of disks, arranged in the thickness direction. Each of the plurality of arranged stockers holds a disk, and the plurality of stockers are moved up and down by an elevating mechanism, and the selected disk is reproduced at a first height to reproduce or record information on the selected disk. When the disk is sandwiched between any of the stockers, and the sandwiched disk becomes a failure disk and the range for raising and lowering the stocker is restricted, the stocker is lifted and lowered in the upward and downward directions. It is possible to determine whether or not the disk can be moved, and detect the failed disk based on the determination result.

  In the disk device of the present invention, when a disk is sandwiched between the stocker, the disk causing the abnormality can be detected by moving the stocker up and down and determining whether or not the disk can move. Therefore, the abnormal situation can be avoided by ejecting the disk which is the cause of the abnormality.

  Hereinafter, an embodiment of a disk device according to the present invention will be described with reference to the drawings.

 FIG. 1 is a sectional view schematically showing a disk device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the internal structure of a disk changer used in the embodiment of the present invention, and FIG. FIG. 4 is a perspective view of a stocker of a disk changer.

 A disk device according to an embodiment of the present invention can reproduce a small disk (for example, 8 cm) and a large disk (for example, 12 cm) having different external dimensions, and stores a plurality of large-diameter disks. Slot-in type disc changer capable of selectively reproducing one disc.

 As shown in FIG. 1, the disk device of the present invention includes a box-shaped housing 1 and a nose member 2 provided on the front surface of the housing 1, and the nose member 2 has an insertion port 2a. Has been established. The insertion port 2a can be opened and closed by a door member (not shown), and a disc can be inserted or ejected through the insertion port 2a.

 The housing 1 is composed of a first chassis 3 and a second chassis 4, and the upper first chassis 3 has a disk transport mechanism 5 and a disk storage disposed on the rear side of the housing 1. A drive unit 7 and a drive drive mechanism 8 are provided in the second chassis 4 below.

 The drive unit 7 can be moved by the drive drive mechanism 8 between the drive position in the vicinity of the disk storage portion 6 and the retracted position in the vicinity of the insertion slot 2a in the directions of arrows Y1-Y2. The drive unit 7 includes a spindle motor, a turntable that rotationally drives the spindle motor, and a clamper that sandwiches the center of the disk between the turntables, but the details are omitted.

 The drive unit 7 is equipped with an optical pickup (not shown), and selects one of the disks stored in the disk storage unit 6 and pulls it out, puts it on a turntable, and rotates it by a spindle motor. The recorded information can be reproduced by the optical pickup, or the information can be recorded on the selected disk by the optical pickup.

Next, the configuration of the disk changer will be described with reference to FIG. FIG. 2 is a perspective view of the disk changer, which includes a mechanism similar to that described in Patent Document 1, and the first chassis 3 is shown upside down from FIG. The disk changer includes a disk transport mechanism 5 and a disk storage section 6, and the disk transport mechanism 5 includes guide sections 9 and 10 that are slidable in a direction orthogonal to the disk transport direction. The distance between 9 and 10 can be changed by a guide body distance changing mechanism including slide plates 11 and 12.
The disk storage 6 will be described in detail. A ring-shaped large-diameter gear 16 is provided on the bottom surface (the top surface in FIG. 1) of the first chassis 3, and an upper regulating member is provided at the center of the large-diameter gear 16. 17 is fixed. The large-diameter gear 16 is rotated by using a motor (not shown) as a drive source, and a detection sensor (not shown) including an encoder or the like in which the rotation amount and the rotation direction of the large-diameter gear 16 are engaged with the large-diameter gear 16 and rotated. )). Four feed screw members 19 are provided outside the large-diameter gear 16.

 As shown in FIG. 3, each feed screw member 19 is provided with a small gear 20, and the small gear 20 meshes with the large-diameter gear 16. As a result, when the large-diameter gear 16 rotates in either the forward or reverse direction, all four feed screw members 19 are synchronously rotated in the same direction. Each feed screw member 19 is formed with a spiral groove 19a of unequal pitch, and the spiral groove 19a is set to have an equal pitch at the upper and lower ends and a narrow pitch width. Is widely set. The large-diameter gear 16, a motor (described later) that rotates the large-diameter gear 16, a feed screw member 19, and a small gear 20 constitute an elevating device that raises and lowers a stocker 21 described later in the axial direction of the feed screw member 19. To do.

 Each feed screw member 19 is inserted into a plurality of (six in the present embodiment) holes 22 of the stocker 21 shown in FIG. As shown in FIG. 4, the stocker 21 has a generally arcuate shape as a whole, and is provided with four holes 22. Convex portions 21 a are provided on the inner surfaces of the four holes 22, and the convex portions 21 a are slidably engaged with the spiral grooves 19 a of the feed screw member 19. As a result, when the feed screw members 19 are synchronously rotated by the large diameter gear 16, the stocker 21 moves up and down in the axial direction of the feed screw member 19.

 The disk storage unit 6 includes the lifting device and the stocker 21, and a plurality of upper support pieces 23 a and lower support pieces 23 b project from the inner circumferential surface of each stocker 21 toward the center. Yes. The upper support piece 23a and the lower support piece 23b are displaced in the thickness direction of the stocker 21, and a disk is held between the upper support piece 23a and the lower support piece 23b. Therefore, the upper support piece 23a and the lower support piece 23b function as a disk holding groove. Then, almost half of the outer peripheral edge of the disk is held between the upper support piece 23a and the lower support piece 23b.

 Further, a buffering prevention member 24 and a pressing member 25 are disposed close to the bottom surface of the first chassis 3, and the buffering prevention member 24 meshes with the large-diameter gear 16. A protrusion 24 a is formed on the buffer preventing member 24, and the protrusion 24 a rotates slightly above the disk transport path in conjunction with the rotation of the large-diameter gear 16. When the desired disc is pulled out from the disc storage unit 6 to the play position, the projecting piece 24a is stopped above the disc, and thereby the disc being played and the disc held by the stocker 21 at the upper position. Will not collide.

 The first guide portion 9 includes a plurality of conveying pulleys 13 having grooves into which the peripheral edge of the disk is inserted, and a plurality of driving gears 14 for applying a driving force to the conveying pulley 13. Is rotated using a motor as a drive source. The transport pulley 13 and the drive gear 14 are arranged in a row and are pivotally supported by the slide plate 11. Only the support shaft of the innermost transport pulley (denoted by reference numeral 13a) is a drive gear that meshes with the transport pulley 13a. It can rotate with respect to the first slide plate 11 around 14 rotation axes.

 Further, the first slide plate 11 is formed with a first receiving portion 11 a, and the first receiving portion 11 a is set at a height position substantially equal to each conveying pulley 13. On the other hand, the second guide portion 10 has a long conveying guide body 15, and the conveying guide body 15 is formed with a guide groove extending linearly along the disk conveying direction. The conveyance guide body 15 is fixed to the second slide plate 12, and a second receiving portion 15a set at a height position substantially equal to the first receiving portion 11a is formed on the lower surface thereof.

 The guide sections 9 and 10, the transport pulley 13 (13 a), the drive gear 14, the transport guide body 15, the first and second slide plates 11 and 12, and the like are between the insertion slot 2 a and the disk storage section 6. The disc transport mechanism (disc transport means) 5 is configured to transport the disc and to pull out a disc selected from the plurality of discs held in the disc storage unit 6 to the play position.

   The first and second guide portions 9 and 10 hold the disk between the conveying pulley 13 and the conveying guide body 15 in a direction orthogonal to the plate thickness direction, and are transmitted from the driving gear 14 to the conveying pulley 13. By applying force to the disc, the disc is transported between the insertion slot 2a and the play position, or between the play position and the disc storage portion 6.

 Further, by sliding the first and second slide plates 11 and 12, the transport pulley 13 and the transport guide body 15 can be brought close to and away from each other, so that it can be transported by either a small diameter disk or a large diameter disk. it can. Further, since the first and second receiving portions 11a and 15a are set at a height position substantially equal to the lower end of each conveying pulley 13, the conveying pulley 13 and the conveying guide body 15 are used when inserting or ejecting the disc. Thus, it is possible to prevent the disk D from falling unintentionally from between.

 In the disk apparatus configured as described above, a disk is inserted into the apparatus from the insertion port 2a of the nose member 2, and one of the stockers 21 is made to face the same height as the transport path of the disk. Since the outer peripheral edge of the disk is held by 21, for example, six disks can be held coaxially in each stocker 21 of the disk storage unit 6 by repeating such an operation.

 FIG. 5 and FIG. 6 are explanatory diagrams for explaining the lifting / lowering operation of the disk held in the stocker 21. FIG. FIG. 5 shows a cross-sectional view of the feed screw member 19. The feed screw member 19 has spiral grooves 19 a (see FIG. 3) with unequal pitches formed on the outer peripheral surface, and the convex portions 21 a provided in the four holes 22 of each stocker 21 correspond to the corresponding feed screw members 19. Screwed into the spiral groove 19a. In the spiral groove 19a, both the upper and lower end portions (both end portions in the longitudinal direction) are set to have an equal pitch and a narrow pitch width, but the intermediate portion has a wide pitch width.

 Each of the feed screw members 19 has the same structure including the pitch width of the spiral groove 19 a, and these feed screw members 19 are rotatably supported by four shafts 19 b erected on the chassis 3. A gear 20 is provided at the end of each feed screw member 19, and a large-diameter gear 16 meshed with these four gears 20 is rotationally driven by a motor (not shown), thereby providing four gears. The feed screw member 19 rotates synchronously. Accordingly, each stocker 21 that holds the disk can be moved up and down in the axial direction of the feed screw member 19 in accordance with the synchronous rotation of each feed screw member 19.

 When any one disk is pulled out from the disk storage unit 6 to the drive position (play position) or taken out of the apparatus, the feed screw members 19 are rotated synchronously to move the stocker 21 up and down in the axial direction. Thus, as shown in FIG. 6, the stocker 21 holding the selected disk is transferred to an intermediate portion of the spiral groove 19a.

  For example, when a desired one of the plurality of disks (D 6 to D 1) held in each stocker 21, for example, the disk D 2 is played, the drive unit 7 is first retracted farthest from the disk storage unit 6. In this state, the four feed screw members 19 are synchronously rotated in one direction to transfer all the stockers 21 to the upper end side of the spiral groove 19a.

  Next, the feed screw members 19 are synchronously rotated in the reverse direction to sequentially lower the stocker 21, and as shown in FIG. 6, the lowermost stocker 21 is moved downward to spiral the second-stage stocker 21 from the bottom. It is transferred to the middle part of the groove 19a. At this time, the stocker 21 in the second stage from the bottom is maintained in a horizontal posture at a first height position equivalent to the transport path of the disk D2.

  Thereafter, when the drive unit 7 is moved from the retracted position to the drive position (Y2 direction) by the drive drive mechanism 8, the drive unit 7 is positioned in a space sandwiched between the selected disk D2 and the disk D1 below the selected disk D2. Then, the disk D2 held by the second-stage stocker 21 from the bottom is pulled out to the drive position by the disk transport mechanism 5, and the center of the disk D2 is sandwiched between the turntable and the clamper of the drive unit 7, and then the spindle motor To rotate the disk D2. Further, if an optical pickup (not shown) mounted on the drive unit 7 is transported in the radial direction of the disk D2, information can be reproduced or recorded on the disk D2.

  The same applies to a case where a disk held in another stocker 21 is played, and selection can be made by synchronously rotating each feed screw member 19 in the forward or reverse direction.

  By the way, in such a changer type disk device, since the stocker 21 has a thin structure as shown in FIG. 4, the disk cannot be accurately held by the stocker 21 due to the warpage of the disk, etc. A disk may be pinched between the lower stockers.

  For example, if the leading end of the disc is inserted below the stocker 21 or if the leading end of the disc has run over the stocker 21 due to the warping of the disc, the disc is inserted between the upper stocker and the lower stocker. It gets caught. In this state, even if an attempt is made to raise or lower the stocker, the stocker cannot be raised or lowered, an error may occur, and the operation may be stopped.

  FIG. 7 shows a malfunction of the operation when the front end of the disk is under the stocker 21. In FIG. 7, six discs D1 to D6 are held in a stocker 21 (respective stockers are indicated by ST1 to ST6). As shown in (a) to (d), a disc D2 to be reproduced is desired. -D5 has shown the state each transferred to the intermediate position (1st height position shown with a dashed-dotted line) of the feed screw member 19. As shown in FIG.

  FIG. 7A shows a case where the disk D2 is reproduced, FIG. 7B shows a case where the disk D3 is reproduced, FIG. 7C shows a case where the disk D4 is reproduced, and FIG. The positions of stockers ST1 to ST6 in the case of reproducing D5 are shown.

  For example, when the disc D4 is held in the disc storage unit 6, when the tip of the disc D4 is inserted so as to sink (drop) under the tip of the stocker ST4, the tip of the disc D4 is placed between the stockers ST4 and ST3. It will be dressed in. When the disc is to be reproduced in this state, as shown in FIGS. 7A and 7B, the stockers ST2 and ST3 are rotated at the intermediate position (first height) of the feed screw member 19 by the rotation of the feed screw member 19. The discs D2 and D3 can be reproduced.

  However, after reproducing the disk D3, when reproducing the disk D5 next, it is necessary to shift from the state of FIG. 7B to the state of (d), but as shown in FIG. Since the tip of the disk D4 is sandwiched between the stocker ST3 and the stocker ST4, the stocker S5 stops at a certain point due to the thickness of the disk D4, and cannot be lowered any further, and movement is restricted.

  Further, when reproducing the disk D2 again after reproducing the disk D3, it is necessary to raise the stocker ST3. As shown in FIG. 7A, this time, the disk D4 is placed between the stocker ST4 and the stocker ST3. Therefore, the stocker ST2 stops at a certain point due to the thickness of the disk D4 and cannot be further raised.

  FIG. 8 shows a malfunction in the operation when the front end of the disk has run on the upper side of the stocker 21. In FIG. 8, for example, when the disk D3 is held in the disk storage unit 6, when the leading end of the disk D3 rides on the leading end of the stocker ST3, the leading end of the disk D3 is sandwiched between the stockers ST4 and ST3. End up.

  In this state, for example, when the disk D4 is to be reproduced, the stockers ST2 and ST3 are lowered by the rotation of the feed screw member 19, and the stocker ST4 is moved to an intermediate position of the feed screw member 19 (see FIG. 8C). If it is transferred to the first height position, it can be regenerated.

  However, after the disk D4 is reproduced, when the disk D5 is reproduced next, it is necessary to shift from the state of FIG. 8C to the state of (d) and to lower the stocker ST4, but the stocker ST3 and the stocker ST4. Since the front end of the disk D4 is sandwiched between them, the stocker S5 stops at a certain point due to the thickness of the disk D4 and cannot be lowered any more, and the movement is restricted.

  Further, when the disc D2 is to be reproduced again after the disc D4 is reproduced, it is necessary to raise the stocker ST3. As shown in FIG. 8A, this time, between the stocker ST4 and the stocker ST3. Since the tip of the disk D4 is sandwiched between them, the stocker ST2 stops at a certain point due to the thickness of the disk D4 and cannot be further raised.

  Therefore, the lifting device stops operating and becomes inoperable unless the sandwiched disk is taken out, and the user requests the manufacturer to repair. Also, when repairing, since it is not known which disk is sandwiched where, it takes a lot of time to eject the disk and restore it.

  FIG. 9 is a diagram showing whether or not the stocker 21 can be moved when the above-described error occurs. FIG. 9A shows whether or not the stocker can move when the leading end of the disk has entered (dropped) under the stocker 21 as shown in FIG.

  In FIG. 9, the uppermost row shows the currently reproduced discs (discs D1 to D6), and the leftmost column in the column direction shows the falling disc. For example, the disk D6 dropping refers to a state in which the tip of the disk D6 has entered under the stocker ST6 and is sandwiched between the stockers ST6 and ST5. In FIG. 9, ◯ and × are indicated by ◯ if the stocker can be moved when moving from the current playback state to playback of another disc, and by × when the movement is restricted.

  For example, in FIG. 9A, when the disk D3 is currently being reproduced and the disk D4 is falling, the stocker can be moved to the reproduction state of the disk D4 next, as indicated by the solid line arrow. It is impossible to move to the reproduction state of the disk D2. When the disk D3 is falling, the stocker can be moved to the reproduction state of the disk D2 next, but cannot be moved to the reproduction state of the disk D4, as indicated by a broken line arrow. This is as described in FIG.

  FIG. 9B shows whether or not the stocker can move when the leading end of the disk rides on the stocker 21 as shown in FIG. In FIG. 9B, the leftmost column in the column direction indicates the disk on which the vehicle is mounted. For example, when the disk D6 rides on, the leading edge of the disk D6 rides on the stocker ST6, and when the disk D5 rides on, the leading edge of the disk D5 rides on the stocker ST5 and is sandwiched between the stockers ST6 and ST5. Refers to the state.

  For example, in FIG. 9B, when the disk D4 is currently being reproduced and the disk D4 is on, the stocker can be moved to the reproduction state of the disk D5 next, as indicated by the solid line arrow. It is not possible to move to the playback state of the disk D3. When the disk D3 is on board, as shown by the broken arrow, the stocker can be moved to the reproduction state of the disk D3 next, but cannot be moved to the reproduction state of the disk D5. This is as described in FIG.

  In FIG. 9, for example, when the disk D3 is dropped when the disk D3 is stored, it falls on the disk D2, so that only the stockers ST2 and ST3 can be moved, and the disk D3 can be moved to other disks other than the disks D2 and D3. If the destination is specified, a movement error occurs. For example, when the disk D3 is loaded when the disk D3 is stored, only the stockers ST3 and ST4 can move, and a movement error occurs when the movement destination is specified to a disk other than the disks D3 and D4.

  In the present invention, when a disk falls or rides on the disk as described above and the disk is sandwiched between the upper and lower stockers, it is detected in which stocker the disk is caught, and the ejection of the obstructing disk is promoted. It is intended to recover from abnormal conditions.

  In other words, after the playback of a given disk is finished, if the movement of the stocker is restricted when the next desired disk to be played is selected and played, the upper stocker of the currently playing disk is moved. Furthermore, the lower stocker is further moved, and whether or not the movement is possible at that time is determined to detect which disk is sandwiched where.

  FIG. 10 is a block diagram showing a control system of the disk apparatus of the present invention. In FIG. 10, reference numeral 31 denotes a control unit, which is composed of a microprocessor including a CPU, and controls the disk transport mechanism 5, the drive unit 7, the drive drive mechanism 8, and the like. Reference numeral 32 denotes a lifting motor for the lifting device, which rotates the large-diameter gear 16 of FIG. 2 in either the forward or reverse direction to synchronously rotate the four feed screw members 19.

 The disk transport mechanism 5 transports the disk to the disk storage unit 6 and pulls out the disk from the disk storage unit 6. The drive unit 7 includes a turntable and an optical pickup. The control unit 31 controls a spindle motor that rotates the turntable and a sled motor that moves the optical pickup in the radial direction of the disk. The control unit 31 also controls the drive drive mechanism 8 to control the movement of the drive unit 7 between the drive position near the disk storage unit 6 and the retracted position near the insertion slot 2a.

  Reference numeral 33 denotes a disk detection unit which detects whether or not the disk is stored in the disk storage unit 6 and whether or not the disk stored in the disk storage unit 6 is at the home position. 6, a stocker home position sensor 34 and stocker sensors 35 and 36 are connected. Reference numeral 37 denotes a display unit.

  A ROM 38 is connected to the control unit 31, and the control unit 31 controls the disk transport mechanism 5, the drive unit 7, the drive drive mechanism 8, and the like according to a program stored in the ROM 38. Further, the control unit 31 determines whether or not the stocker can be moved in the upward and downward directions by raising and lowering the stocker when a disk is caught between the stockers and becomes an obstacle, and the range of the stocker is restricted. Based on the above, the faulty disk is detected. The control unit 31 displays various messages and the like on the display unit 37 based on the abnormality detection result.

  Next, an example of the abnormality detection operation of the present invention will be described with reference to the flowchart of FIG.

  Step S0 in FIG. 11 is an operation start step. In step S1, a predetermined disk is pulled out from the disks (D1 to D6) stored in the disk storage unit 6 to perform reproduction. Next, when an instruction to reproduce another disk is received, in step S2, the control unit 31 moves the lifting device up and down to move the stocker holding the designated disk to the designated destination. When the movement is completed in step S3, in step S4, the designated disk is pulled out from the disk storage unit 6 and reproduced.

  At this time, if the lifting / lowering device does not operate normally due to dropping or riding on the disk and the designated disk cannot be reproduced, the process proceeds to step S5 to retry and attempt reproduction. Here, if it cannot move even after trying a predetermined number of times (for example, 3 times), it is determined that an abnormality has occurred, and the stocker 21 is temporarily returned to the movement source in step S6. The subsequent steps are steps for detecting the abnormality and ejecting the disk that caused the abnormality.

  Here, the disk currently being reproduced is set as Dn, and moving the stocker 21 to reproduce the disk Dn + 1 on the first stage and the disk Dn + 2 on the second stage moves to n + 1, or n + 2 Call to move to. In addition, moving the stocker 21 to reproduce the lower disk Dn-1 or the lower disk Dn-2 is referred to as moving to n-1 or moving to n-2. In the following steps, it is determined whether or not the movement is possible. The movement is possible when the stocker 21 can move to a normal position. The movement impossible means that the movement range is limited and the movement to a normal position. Say when you can't.

  First, in step S7, an attempt is made to move to n + 1. In the next step S8, it is determined whether or not the movement is possible. If the movement is possible, the process proceeds to the next step S9, and further movement to n + 2 is attempted. In step S10, it is determined whether or not movement to n + 2 is possible. If movement is not possible, movement to n-1 is attempted in step S11.

  That is, as can be seen from FIG. 9, when the disk Dn + 1 has fallen from the stocker or the disk Dn is on the stocker, it can move to n + 1 but cannot move to n-1. . Moreover, the movement to n + 2 is also impossible. Therefore, if it is not possible to move to n−1 in step S11, it can be determined that the disk Dn + 1 is falling from the stocker or the disk Dn is riding on the stocker. If it is possible to move to n + 2 in step S10, the process proceeds to step S12, where the cause of the abnormality is processed as a result of other unexpected factors.

  On the other hand, if it is determined in step S13 that the movement to n-1 is not possible, the next step S15 prompts the display unit 37 to eject the disk Dn, and the user ejects the disk Dn. The disc can be ejected by returning the stocker 21 to the movement source. Accordingly, one of the causes of the abnormality (the disk Dn + 1 is falling from the stocker or the disk Dn is riding on the stocker) is removed here. If it is possible to move in step S13, the process proceeds to step S15, and the cause of the abnormality is processed as a result of other unexpected factors.

  Next, in step S16, the movement to n + 2 is attempted again. If the movement is possible (OK) in step S17, the process ends in step S29. That is, the movement is enabled in step S17 because the disk Dn is ejected, and in this step S17, it can be confirmed that the abnormality is caused by the disk Dn being loaded. If the disk Dn + 1 cannot be moved in step S17, it is because the disk Dn + 1 has fallen from the stocker, and the display unit 37 is prompted to eject the disk Dn + 1 in the next step S18. When the user ejects the disk Dn + 1, the process ends in step S29. In this way, an abnormality is detected and a disc that becomes a failure is ejected.

  On the other hand, if it is determined in step S8 that it is not possible to move to n + 1, the process proceeds to step S19 and attempts to move to n-1. In step S20, it is determined whether or not the movement to n-1 is possible. If the movement is possible, the movement to n-2 is further attempted in step S21.

  That is, as can be seen from FIG. 9, when the disk Dn is falling from the stocker or when the disk Dn-1 is loaded on the stocker, it cannot move to n + 1 but can move to n-1. . Moreover, movement to n-2 is not possible. Therefore, if it is possible to move to n−1 in step S19, it can be determined that the disk Dn is falling from the stocker or the disk Dn−1 is riding on the stocker. If it is not possible to move to n-1 in step S20, the process proceeds to step S22, where the cause of the abnormality is processed as a result of other unexpected factors.

  If it is determined in step S23 that the movement to n-2 cannot be performed, the next step S24 prompts the display unit 37 to eject the disk Dn-1, and the user ejects the disk Dn-1. Discs can be ejected by returning the stocker to the source. Therefore, one of the causes of the abnormality (the disk Dn is falling from the stocker or the disk Dn-1 is riding on the stocker) is removed here. If it becomes possible to move in step S23, the process proceeds to step S25, and the cause of the abnormality is processed as being caused by another unexpected factor.

  Next, in step S26, the movement to n-2 is attempted again. If the movement is possible (OK) in step S27, the process is terminated in step S29. That is, the reason why the movement is enabled in step S27 is that the disk Dn-1 has been ejected, and in this step S27, it can be confirmed that the abnormality is due to the disk Dn-1 being loaded. If it is determined in step S27 that the disk cannot be moved, it is because the disk Dn is loaded from the stocker. In the next step S28, the display unit 37 is prompted to eject the disk Dn, and the user ejects the disk Dn. And the process ends in step S29. In this way, an abnormality is detected and a disc that becomes a failure is ejected.

  It should be noted that if the movement designation is a designation exceeding the upper limit disk D6 or the lower limit disk D1, it is determined that the movement cannot be made (NG). Further, if it is determined in steps S12, S15, S22, or S25 that the abnormality has occurred due to other unexpected factors, there may be a disc storage error or a mechanical error other than those described above. A message to that effect is displayed at 37.

  As described above, in the disk device of the present invention, when the lifting / lowering device cannot be moved due to dropping or riding on the disk, the stocker is moved up and down under the control of the control unit 31 to determine whether or not the movement is possible. It is possible to detect the disk that is causing the error. Therefore, the abnormal situation can be avoided by ejecting the disk which is the cause of the abnormality. Further, when there is another cause of abnormality, another measure can be taken by displaying something on the display unit 37, and it becomes easy to determine the cause of the abnormality even when a serviceman performs repairs.

  The configuration of the present invention is not limited to the above description, and various modifications can be made without departing from the scope of the claims.

1 is a cross-sectional view schematically showing an internal mechanism of a disk device according to an embodiment of the present invention. The perspective view which shows the structure of the disc storage part used by this invention. The front view which shows the structure of the feed screw member used by this invention. The perspective view which shows the structure of the stocker used for the disc storage part of this invention. Explanatory drawing which shows the raising / lowering operation | movement of the disk by the feed screw member of this invention. The side view explaining the reproduction | regeneration operation | movement of the disc in one Embodiment of this invention. Explanatory drawing explaining the malfunction accompanying the storage abnormality of a disk. Other explanatory drawing explaining the malfunction accompanying abnormal storage of a disk. Explanatory drawing explaining whether the stocker can be moved due to an abnormal storage of the disk. 1 is a block diagram showing a configuration of a control system of a disk device according to an embodiment of the present invention. The flowchart explaining operation | movement of the control system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing | casing 2 ... Nose member 3, 4 ... Chassis 5 ... Disk conveyance mechanism 6 ... Disk storage part 7 ... Drive unit 8 ... Drive drive mechanism 19 ... Feed screw member 21 (ST1-ST6) ... Stocker 31 ... Control part 32 ... Elevating motor 33 ... Disc detector 37 ... Displays D1-D6 ... Disc

Claims (10)

A changer type disk device that selects and reproduces or records information from any one of a plurality of disks,
A disk having a plurality of stockers for holding a plurality of disks side by side in the thickness direction and a lifting mechanism for lifting and lowering the plurality of stockers, and moving the selected disk to a first height position by lifting and lowering the stocker A storage section;
A drive unit for reproducing or recording information on the selected disc at the first height position;
When a disk is caught between any of the stockers, and the sandwiched disk becomes an obstacle disk and the range of raising and lowering the stocker is limited, the stocker is moved up and down to determine whether it can move in the upward and downward directions. And a control unit that detects the failed disk based on the determination result.   When the raising / lowering range of the stocker is limited, the control unit temporarily returns the first stocker holding the selected disk to the first height position in order to detect the failed disk, and the first stocker 2. The disk apparatus according to claim 1, wherein the disk apparatus is moved in the upward and downward directions around the height position.   The controller is configured to move the first stocker in the upward direction and restrict the movement in the downward direction, or move in the downward direction and move in the upward direction when the raising / lowering range of the stocker is restricted. 3. The disk device according to claim 2, wherein the disk device is determined whether or not the disk is restricted, and the failed disk is detected based on the determination result.   The disk device according to claim 1, wherein the control unit displays a message prompting ejection from the disk storage unit on the display unit when the failed disk is detected.   The disk device according to claim 1, wherein the control unit displays another message on the display unit when there is an unexpected cause that restricts the raising and lowering of the stocker. An error detection method for a changer-type disk device that selects or reproduces information by selecting one of a plurality of disks,
Each disc is held in multiple stockers arranged side by side in the thickness direction,
The plurality of stockers are moved up and down by a lifting mechanism, and the selected disk is moved to a first height position to reproduce or record information on the selected disk,
When a disk is caught between any of the stockers, and the sandwiched disk becomes an obstacle disk and the range of raising and lowering the stocker is limited, the stocker is moved up and down to determine whether it can move in the upward and downward directions. And
An abnormality detection method for a disk device, comprising: detecting the failed disk based on the determination result.   When the raising / lowering range of the stocker is limited, the first stocker holding the selected disk is temporarily returned to the first height position, and moved in the upward and downward directions around the first height position. 7. The disk device abnormality detection method according to claim 6, wherein the failure disk is detected.   Whether the first stocker is movable in the up-and-down direction and the movement in the downward direction is restricted, or is movable in the downward direction and restricted in the upward direction when the raising and lowering range of the stocker is restricted 8. The disk device abnormality detection method according to claim 7, wherein the failure disk is detected based on the determination result.   7. The disk device abnormality detection method according to claim 6, wherein when the failed disk is detected, a message prompting ejection from the disk storage unit is displayed on the display unit.   7. The disk device abnormality detection method according to claim 6, wherein when there is an unexpected cause for limiting the raising / lowering range of the stocker, another message is displayed on the display unit.

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