JP2929449B2 - Positioning control method for changer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for storing and pulling out a recording medium from a plurality of storage spaces prepared in advance for recording and reproducing information on a disk-shaped or cartridge-shaped recording medium. The present invention relates to a positioning control method for a changer device.

[0002]

2. Description of the Related Art Conventionally, disc-shaped recording media such as a so-called mini disc (hereinafter abbreviated as "MD") and a compact disc (hereinafter abbreviated as "CD"),
In order to effectively use a cartridge-shaped recording medium such as a cassette tape, a changer device is used. In the changer device, a plurality of recording media can be stored in a magazine, and information recording and reproduction are performed by repeating the operation of storing a recording medium in the storage space and pulling it out of the storage space. As a positioning method for accessing a magazine for storing a recording medium, a method for specifying a storage space relatively from a reference position is generally used.

FIGS. 7, 8 and 9A show a magazine for accommodating a recording medium. Each magazine is provided with a plurality of storage spaces 1, 2, 3, and 4. The position detection mechanism 6 is provided in the positioning mechanism 5 shown in FIG. The position detection sensor 6 detects the openings of the storage spaces 1 to 4 and derives a position pulse signal as shown in FIG. The positions of the storage spaces 1 to 4 are recognized by counting position pulses when the positioning mechanism 5 is moved from the reference position 7. In the case where the recording medium is an MD or the like and an MD player or a CD player for playing recorded music or the like, a function such as an Up / Down function that can select a recording medium to be played at an arbitrary timing is provided. Have been.

[0004]

The basic performance required of the above-mentioned changer device is that the operation of the device is quick, the time from the selection of the recording medium to the start of the performance is minimized, and the response is reduced. It is desired to speed up. However, the method shown in FIGS. 7 to 9 has a problem that the response of the device becomes slow when the target storage space is changed during the positioning operation.
Hereinafter, during the transition of the positioning mechanism 5 from the position corresponding to the storage space 4 to the position corresponding to the storage space 1,
It is assumed that a command is issued at the change position 8 between the storage space 2 and the storage space 3 to shift the position corresponding to the storage space 3 as a new target position.

[0005] Fig. 7 shows a method of positioning the storage space 1 as the immediately preceding target, continuously, and after completing the operation, starting a transition to a new target position and positioning. FIG. 8 shows a method of first performing positioning to the reference position 7 as it is, confirming the reference position 7, and then starting to shift to a new target position again for positioning. The reason for adopting these methods is that the position detection by the position detection sensor 6 is based on, for example, position pulse generation by a position detection slit and an optical element and pulse counting. This is because there is a risk of erroneous position detection.

[0009] That is, as shown in FIG. 9, if the transition direction is immediately switched at the change position 8, there is a possibility that the wrong target is positioned as shown by a broken line. According to a method as shown in FIGS. 7 and 8 in order to prevent such a malfunction,
It takes a lot of time to reach the target position, and the response of the operation as the changer device deteriorates.

An object of the present invention is to provide a positioning control method for a changer device in which there is no risk of erroneous position detection even if the response is made faster.

[0008]

SUMMARY OF THE INVENTION The present invention provides a changer device capable of storing a recording medium in a plurality of storage spaces arranged in one direction and capable of moving in the mounting direction facing an opening of the storage space. Is a control method for identifying and positioning each opening in an opening of a target storage space relatively determined from a predetermined reference position by an instruction from the outside, wherein the target is set in advance. On the way to the storage space, when receiving a command to move to the storage space located in the direction opposite to the transition direction, the transition is continued until the next opening is identified in the direction of the transition, and the next storage space is received. A positioning control method for a changer device, wherein positioning is performed with respect to an opening of the changer device, the transfer direction is reversed, the storage space specified is transferred as a new target, and positioning is performed at the opening. Also, the present invention, when receiving a command to shift to a different storage space located in the direction in which the storage space is being moved in the middle of shifting to the storage space targeted in advance, continues the shift and replaces the specified storage space with a new one. It is characterized in that it is positioned as a simple target. Further, the present invention provides a changer device that can be stored in a plurality of storage spaces in which recording media are arranged in one direction, and that can be shifted in the arrangement direction facing an opening of the storage space.
A control method for identifying and positioning each opening in an opening of a target storage space relatively determined from a predetermined reference position by an external command. When a command to shift to a different storage space is received in the course of fine positioning with respect to the storage space targeted in advance, which is performed in multiple stages of coarse positioning until reaching the target position and fine positioning for accurately converging to the target position. A positioning control method for a changer device, wherein after the fine positioning is completed, the commanded storage space is shifted to a new target and positioned at the opening.

[0009]

According to the present invention, the changer device can face the openings of a plurality of storage spaces arranged in one direction and can be shifted in the arrangement direction. Positioning is performed while identifying each opening in the opening of the target storage space relatively determined from the position. On the way to the storage space targeted in advance, when receiving a command to move to the storage space located in the opposite direction to the transition direction,
The transition is continued until the next opening is identified in the direction during the transition, and positioning with respect to the opening of the next storage space is performed. Next, the transfer direction is reversed, and the commanded storage space is transferred as a new target, and positioned at the opening. Since positioning is performed with the storage space as a unit, positioning can be performed reliably without erroneous targets. Since the positioning is only performed at the opening of the next storage space located in the transition direction, the response can be made faster as compared with the case where the positioning is performed after shifting to the first target position or the reference position.

According to the present invention, when a command to move to a different storage space located in the direction of the transition is received during the transition to the storage space previously targeted, the transition is continued and the command is issued. The new storage space is positioned as a new target. Since the new target position exists in the direction during the transition, even if the new target position is not once positioned at the original target or reference position, the target can be quickly positioned without error.

Further, according to the present invention, the changer device can move in the disposing direction facing the openings of the plurality of storage spaces disposed in one direction, and can be moved in the disposing direction by an external command.
Positioning is performed while identifying each opening at the opening of the target storage space relatively determined from a predetermined reference position. Positioning of the changer device is performed in a plurality of stages of coarse positioning until reaching the target and fine positioning for accurately converging to the target position. If a command to shift to a different storage space is received in the middle of fine positioning with respect to the storage space previously targeted, the fine positioning is completed, and then the specified storage space is shifted as a new target, and the opening is opened. To the part. Since the fine positioning is completed, a reliable position can be secured.
Since the transition between the storage spaces is performed by rough positioning, the response can be made faster.

[0012]

FIG. 1 shows a simplified basic positioning method according to an embodiment of the present invention. This embodiment relates to the operation of the changer of the MD playback device. The MD is handled in a state of being housed in a substantially rectangular and plate-like casing, and FIG.
It can be individually stored in a plurality of storage spaces formed in the magazine shown in FIG. 1, 2, 3,
Address 4 is assigned. The positioning mechanism 5 shown in FIG. 1B detects the opening of each of the storage spaces 1 to 4 by the position detection sensor 6 and generates a position pulse signal as shown in FIG. The addresses of the storage spaces 1 to 4 are relatively determined based on the reference position 7.

Similar to the case of FIGS. 7 to 9 described above, it is assumed that the storage space 3 is designated as a new target position at the change position 8 on the way from the storage space 4 to the storage space 1. In this embodiment, the control device 9 causes the positioning mechanism 5 to position the next storage space 2 in the transition direction, and then reverses the transition direction to start positioning the storage space 3 as a new target position. This makes it possible to achieve both positioning accuracy and response. Further, control for shifting the positioning mechanism 5 in accordance with the relationship with the target position includes coarse control for performing rough positioning for quickly reaching the target position and fine positioning for converging on the target position and stopping accurately. The convergence control is performed by switching between two types of control modes.

FIG. 2 shows a change position 8 in the embodiment of FIG.
The control method by the control device 9 from FIG. Step a1
, And in step a2, it is determined whether the mode under control is the coarse control. If the control is coarse, step a
At 3, it is determined whether or not the sheet has passed the storage position, which is the position of the opening of the storage space. If it has passed, in step a4,
It is determined whether or not the new target position is on the opposite side of the previous transition direction. If it is determined that the current position is not the opposite side, it is determined in step a5 whether the vehicle has passed the new target position. If it is determined in step a4 that the vehicle is on the opposite side, or if it is determined in step a5 that the vehicle has passed the target position,
The process proceeds to step a6 to start positioning by convergence control at the position just passed.

If it is determined in step a2 that the coarse control is not being performed, the process proceeds to step a7 to determine whether or not the convergence control is being performed. If the convergence control is being performed, the process proceeds to step a8,
The convergence control is continued, and it is determined whether or not the convergence control is completed in step a9. If it has been completed, or if it is determined in step a7 that convergence control is not being performed, both coarse control and convergence control have been completed and stopped.
It moves to 10 and judges whether or not it matches the target position. When it is determined that it does not match the target position,
In step a11, rough control for starting the shift to the target position is performed. If it is determined in step a11 that the position matches the target position, the control is completed in step a12.

When it is determined in step a3 that the vehicle has not passed the storage position, when it is determined in step a5 that the vehicle has not just passed the target position, it is determined in step a9 that the convergence control has not been completed. When step a6 and step a11 are completed, the process returns to step a2.

FIG. 3 shows an MD reproducing apparatus 21 related to the present invention.
FIG. 4 is a plan view with the top plate removed, and FIG.
FIG. 5 is a cross-sectional view as viewed from −A, and FIG. 5 is a perspective view of the MD playback device 21 with a top plate removed. The MD playback device 21 is generally configured by housing a lifting device 23, a magazine 24, a playback device 25, and the like in a housing 22. The lifting device 23 corresponds to the positioning mechanism 5 in FIG. Side walls 27, 28 and a back wall 29 are erected from a bottom plate 26 of the housing 22, a top plate 30 is mounted on the upper surface, and M
An insertion / ejection port 32 for inserting / ejecting D11 is provided.

The lifting device 23 includes a lifting member 33 and a pair of lifting levers 34 and 35. The lifting member 33 includes a storage part 36 for storing the MD 11 inserted into the MD playback device 21, and one side wall 2 from the storage part 36.
7 and the other side wall 28
And a support piece 39 extending to the side. An erroneous insertion prevention lever 40 is provided on the support piece 37, and a pressing portion 41 of the support piece 37 passes through the side wall 42 of the elevating member 33 and faces the storage portion 36. Further, a switch 43 is provided on the support piece 38, and an actuator 44 thereof is inserted into the side wall 42 to face the storage section 36.

The erroneous insertion prevention lever 40 has both ends of a spring 47 hooked on a hooking piece 45 formed on the erroneous insertion prevention lever 40 and a hooking piece 46 formed on the support piece 37, respectively. The storage unit 3 indicated by the arrow of the reference numeral 48a
The spring is biased in six directions. In addition, the erroneous insertion prevention lever 40
A pair of pins 50 erected on the support piece 37 are fitted in a pair of guide grooves 49 formed in the direction of the arrow 48a and the opposite direction 4a.
8b is allowed to be displaced.

The support piece 39 has an erroneous insertion prevention lever 51,
Switches 52, 53, and 54, motors 55 and 56, gear trains 57 and 58, a roller pressure lever 59, and the like are provided. The erroneous insertion prevention lever 51 is provided with the erroneous insertion prevention lever 4.
Similarly to the case 0, the pin 61 is fitted in the guide groove 60 so that the pressing piece 62 can be protruded or retracted into the storage portion 36, and the erroneous insertion preventing lever 5 is attached.
The both ends of the spring 65 are respectively hooked by the hooking piece 63 formed in 1 and the hooking piece 64 formed in the support piece 39, and the spring is biased in the direction of the arrow 48b. A switch 52 is provided on the other side wall 28 side of the erroneous insertion prevention lever 51.

When the MD 11 is inserted into the storage section 36, M
The erroneous insertion prevention lever 51 is pressed and displaced in the direction of the arrow 48b by D11, and the erroneous insertion prevention lever 51 is displaced.
Is pressed in the direction of the arrow 48a to be displaced, and the actuator 66 is pressed by the pressing piece 67 so that the switch 5 is pressed.
2 conducts. The support piece 39 is provided with a motor 55 driven by a conduction signal of the switch 52. The output of the motor 55 drives a gear 70 via a worm 69 attached to the tip of an output shaft 68, and further drives the gear train 5.
7, the rollers 71 and 12 are decelerated by arrows 73.
Is rotated in the direction shown in FIG.

The roller 71 and the gear 74 are rotatably supported by a roller holder 75 formed in a substantially U-shape by shafts 71a and 74a, and the roller holder 75 swings on a support piece 39 by a shaft 74a. It is supported so that it can be displaced dynamically. A roller pressure spring 77 is wound between the shaft 71a and the fixed shaft 76 erected on the support piece 39 via the shaft 74a. The roller compression spring 77 is attached so that a spring force acts in a direction in which the roller 71 indicated by the reference numeral 53 projects into the storage section 36. As a result, the roller 57 can be driven to rotate in a state where the roller 57 is pressed against the MD 11 inserted into the storage section 36, so that the MD 11
Can be reliably fed into the storage section 36.

Similarly, a spring force in the direction indicated by the arrow 82 is applied between the swing shaft 16 and the fixed shaft 81 from the shaft 72a erected on the swing arm 15 covering the roller 12 and the gear 79. The generated roller pressure spring 83 is wound. As a result, the roller 12 is also mounted on the side wall 8 of the magazine 24.
4 protrudes into the magazine 24 from the window 14 formed in the
It can be driven to rotate in a state of being pressed against D11.

The motor 56 is provided on the side of the back wall 29 of the support piece 39, and its output is transmitted to a gear 87 via a worm 86 attached to the tip of an output shaft 85. further,
After being reduced by the gear train 58, the roller pressing lever 5
The gear 89 meshing with the rack 88 is driven. Since the follower 93 erected on the support piece 39 is fitted into the elongated hole 92 formed in the falling piece 91 of the roller pressure lever 59, the displacement of the roller pressure lever 59 is indicated by arrows 94a and 94.
It is regulated in the direction shown by b. Roller pressure lever 59
When the roller pressing lever 59 is displaced to the position closest to the back wall 29, the rising piece 95 formed at
The third actuator 96 is pressed. Thus, the driving of the motor 56 is stopped.

The roller pressing lever 59 is provided with an inclined portion 97. When the roller pressing lever 59 is driven in the direction of the arrow 94a, the roller pressing lever 59 is guided by the shaft 12a and swings.
Is displaced along the inclined portion 97 in the direction indicated by the arrow 82, and the roller 12 projects from the window 14 to a position where it comes into contact with the side surface of the MD 11. In addition, the roller pressure lever 59
Is driven in the direction of the arrow 94b, the swing arm 15 is displaced in the direction opposite to the direction of the arrow 82, and the roller 12 returns to a predetermined position by the spring force of the roller pressing spring 83. At this time, the actuator 98 of the switch 54 is pressed by the swing arm 15, and the opening of the roller 12 is detected.

A positioning piece 99 is also formed on the roller pressure lever 59, and a guide piece 100 is extended correspondingly to each of the storage sections 13 described later on the side wall 84 of the magazine 24. The guide piece 100 has a guide groove 10 formed wider toward the lifting member 33 side.
0a. Accordingly, as described above, when the roller pressing lever 59 is displaced in the direction of the arrow 94a until the switch 53 is turned on, the guide piece 99 is fitted into the guide groove 100a, and thus the MD 11 is raised and lowered during insertion and ejection of the MD 11 into the magazine 24. Accurate positioning of the elevating / lowering position of the member 33 can be performed. The positioning of the elevating member 33 during the transition is performed in two stages of coarse positioning and fine positioning as described above. Furthermore, since it is mechanically positioned, the MD 11 can be reliably inserted and ejected.

On the bottom plate 26, a motor 101 and a gear train 102 are provided below the storage section 36. When the motor 101 is driven, its output is output to the output shaft 103.
After being decelerated through the worm 104 and the gear train 102 attached to the
4 is transmitted to the rack 106. The elevating lever 34 and the elevating lever 35 are connected to the connecting levers 107 and 10 at one end of the elevating levers 34 and 35 in the longitudinal direction and at the other end.
8 connected. Guide grooves 109 and 110 are formed in the lift levers 34 and 35, respectively, and follower 111 projecting from the support piece 38 is formed in the guide grooves 109.
Are fitted, and the follower 125 formed on the support piece 39 is fitted into the guide groove 110. As a result, the lift levers 34 and 35 are moved by the motor 101 to the arrows 94a and 94a.
By being driven in the 4b direction, the lifting member 33 can be moved up and down.

The magazine 24 is provided above a reproducing device 25 to be described later, and generally includes a top plate 112 and a bottom plate 113.
The three partition plates 114 are disposed between the two, and four storage portions 13 are formed as storage spaces, and four MDs 11 can be stored. A switch 115 is provided in each storage section 13 at a position close to the back wall 29 on one side wall 84 of the magazine 24.
Project through the side wall 84 to the inside of the storage section 13. When the MD 11 is inserted into the space of the storage unit 13 by the roller 12, the actuator 116 is pressed at the corner 117 of the MD 11, and the switch 115 is turned on.

When the storage of the MD 11 in the magazine 24 is detected in this way, the driving of the motor 55 is stopped and the rotation of the roller 12 is stopped. Each storage unit 13 also has
On the side wall 84, a leaf spring member 118 projecting inward from the magazine 24 is formed.
8 is a casing 1 of the MD 11 stored in the storage unit 13
19 is pressed against the other side wall 120. This gives M
The play of D11 against the magazine 24 is prevented.

The MD 11 has a disk 121 that can be optically and magnetically recorded or reproduced and is housed in a casing 119. The disk 121 has a clamp at its center which is attracted to a turntable 134 described later. The casing 119 has a driving hole 1 corresponding to the clamp plate 122.
23 are formed.

Correspondingly, a plate spring member 124 formed by cutting and raising the partition plate 114 and the bottom plate 113 is provided at the center of the partition plate 114 and the bottom plate 113, and enters through the drive hole 123 of the inserted MD11. Then, the clamp plate 122 attached to the center of the disk 121 is pressed toward the top plate 112. As a result, rattling of the disk 121 in the casing 119 is prevented.

FIG. 6 is an exploded perspective view of the reproducing apparatus 25. This reproducing device 25 is generally composed of a holder 131,
It is provided with an elevating mechanism 132 and a reproducing mechanism 133. The reproducing mechanism 133 rotates the disk 121 by rotating the disk 121 by inserting the turntable 134 into the driving hole 123 to attract the clamp plate 122 to the MD 11 loaded into the reproducing mechanism 133 by the holder 131. The 135 reads out the recorded content recorded on the disk 121, thereby reproducing the recorded content.

The holder 131 can be displaced by a lifting mechanism 132 between a rising position indicated by a solid line in FIG. In the raised position, the lifting member 3
3 can be taken in or ejected, and in the lowered position, the MD 11 can be loaded on the turntable 134 and made reproducible. Holder 131 is MD1
1 comprises a substantially U-shaped frame 141 surrounding the
Guide pins 144, 145; 146, 147 are erected on both side walls 142, 143 of the frame 141, respectively. A guide piece 148 similar to the guide piece 100 and a through hole 149 corresponding to the through hole of the window 14 are formed on the side of the elevating member 33 on the side wall 143. Furthermore, the leaf spring member 118 is provided on the side wall 142.
Is formed, and the casing 119 of the MD 11 taken into the frame 141 is held by the leaf spring member 150 without play.

The raising / lowering mechanism 132 is generally constituted by a lever 151.
, Motor 152, gear train 153, regulating plate 154-
156. Regulatory plates 154-15
6 is erected from the bottom plate 26, and the regulating plates 154-1
Guide grooves 164, 165;
The guide pins 144, 145; 146, 147 are fitted in the frame 7, respectively, so that the frame 141 can be displaced only in the vertical direction.

The guide pins 144 and 145 are inserted into the guide grooves 161 and 162 formed in the lever 151 after passing through the guide grooves 164 and 165, respectively. These guide grooves 161 and 162 are formed in a direction crossing the guide grooves 164 to 167 formed in the vertical direction. The lever 151 is displaced in the horizontal direction by fitting a guide pin 168 formed on the gantry 160 and a guide pin 169 formed on the regulating plate 154 into long holes 170 and 171 formed in the longitudinal direction of the lever 151. It becomes possible.

A rack 173 is formed on one side surface 172 of the lever 151. A driving force from a motor 152 attached to the gantry 160 is transmitted to the rack 173 via a gear train 153. Furthermore, in the lever 151, the rising piece 1 is located near both ends in the longitudinal direction.
74, 175 are formed, and these rising pieces 174, 175 are connected to the actuators 1 of the limit switches 176, 177 attached to the gantry 160.
78, 179, respectively.

When the motor 152 is driven, the lever 15
1 is displaced in the horizontal direction, and the rising pieces 174 or 175
Is in contact with the actuator 178 or 179, respectively, the drive of the motor 152 is stopped, and thus the lever 151 can be displaced within the range of the limit switches 176 and 177.

With the displacement of the lever 151, the guide pins 144 and 145 are guided by the guide grooves 161 and 162, respectively, so that the frame 141 can be vertically displaced as described above. A switch 180 is provided at the end of the frame body 141 on the side of the back wall 29.
1 is used to detect the presence or absence of the MD 11 in the unit 1.

The lever 151 is also provided with a guide groove 16.
1, 162, bias pieces 181 and 182 are attached. These bias pieces 181 and 182 are provided near both ends of the guide grooves 161 and 162, that is, the frame 141.
Abuts on the guide pins 144 and 145 in a state where is at a predetermined ascending position or a descending position.
184 and these contact pieces 183 and 184
1 and a mounting piece 185 for fixing the mounting piece 185. Therefore, the frame 141 is held without play in the raised position or the lowered position by the bias pieces 181 and 182.

The MD reproducing apparatus 21 configured as described above
When the switch 52 detects that the MD 11 has been inserted from the insertion / ejection opening 32, the motor 55 is driven, and the MD 11 is taken into the elevating member 33 until the switch 43 detects the completion of the taking. Thereafter, the motor 10 is operated in response to an input operation to operation means (not shown).
1 is driven, and the elevating member 33 is displaced so as to face the predetermined storage portion 13 of the reproducing device 25 or the magazine 24.

Next, the motor 56 is driven to displace the roller pressing lever 59 in the direction of the arrow 94a to position the elevating member 33 by the guide piece 99, and the roller 12 is moved into the magazine 24 or the reproduction device 25. Frame 1
It is projected into 41. When the transfer preparation of the MD 11 is completed in this way, the motor 55 is driven again to take the MD 11 into the magazine 24 or the frame 141. Switch 1
When it is detected by 15 or 180 that the MD 11 has been taken up to the predetermined take-in position, the motor 55 is stopped, and when reproduction is performed, the motor 152 is driven to load the MD 11 into the predetermined reproduction position. You.

The MD 11 whose reproduction has been completed is stored in a predetermined storage section 13 in the magazine 24 in response to the input operation or the like, or the insertion / ejection port 32 is operated in a reverse manner to the above.
Is discharged to the outside.

[0043]

As described above, according to the present invention, the changer device moves along the openings of the plurality of storage spaces arranged in one direction to the storage space previously targeted. When a command to move to the storage space located in the opposite direction to the transition direction is received, the transition is continued in the direction during the transition until the next opening is identified, and the positioning with respect to the opening of the next storage space is performed. As a result, reliable positioning can be ensured. Next, the transfer direction is reversed, and the commanded storage space is transferred as a new target, and positioned at the opening. Since positioning is only performed at the opening of the next storage space located in the transition direction, the time required for positioning is shortened, and the response is reduced compared to when positioning is performed after shifting to the first target position or reference position. Can be faster.

According to the present invention, when a command to move to a storage space having the same direction but a different position is received during the transition to the storage space previously targeted, the transition is continued and the command is issued. The new storage space as a new target. Since the new target position is in the direction of the transition,
Even if the target is not once positioned at the original target or reference position, quick positioning can be performed directly without erroneous positioning of the target.

Further, according to the present invention, the changer device can move in the disposing direction facing the openings of the plurality of storage spaces disposed in one direction, and can be moved by an external command.
Positioning is performed while identifying each opening at the opening of the target storage space relatively determined from a predetermined reference position. Positioning of the changer device is performed in a plurality of stages of coarse positioning until reaching the target and fine positioning for accurately converging to the target position. If a command to shift to a different storage space is received in the middle of fine positioning with respect to the storage space previously targeted, the fine positioning is completed, and then the specified storage space is shifted as a new target, and the opening is opened. To the part. Since the transition to a new target is started after the fine positioning is completed, a reliable position can be secured. Since the transition between the storage spaces is performed by rough positioning, the response can be made faster.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a control method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of FIG.

FIG. 3 is a plan view of the MD playback apparatus 21 related to the present invention, with a top plate removed.

FIG. 4 is a cross-sectional view of FIG. 3 as viewed from a section line AA.

FIG. 5 is a perspective view of the MD playback device 21 of FIG. 3 with a top plate removed.

6 is a perspective view of a playback device 25 in the MD playback device 21 of FIG.

FIG. 7 is a schematic diagram showing a control method according to a technology on which the present invention is based.

FIG. 8 is a schematic diagram showing a control method according to a technique on which the present invention is based.

FIG. 9 is a schematic diagram showing a control method according to a technology on which the present invention is based.

[Explanation of symbols]

 1-4 Storage space 5 Positioning mechanism 6 Position detection sensor 7 Reference position 8 Change position 9 Controller 11 MD 12 Roller 13 Storage section

Claims (3)

(57) [Claims] 1. A changer device capable of storing a recording medium in a plurality of storage spaces arranged in one direction and capable of moving in the arrangement direction facing an opening of the storage space by an external command. A control method for identifying and positioning each opening in an opening of a target storage space relatively determined from a predetermined reference position, and in the process of shifting to a previously targeted storage space, When receiving a command to move to the storage space located in the opposite direction to the transition direction, continue the transition until the next opening is identified in the direction in transition, perform positioning with respect to the opening of the next storage space, A positioning control method for a changer device, characterized in that the transfer direction is reversed, the commanded storage space is transferred as a new target, and positioning is performed at the opening. 2. When a command to move to a different storage space located in the direction of the transition is received during the transition to the storage space previously targeted, the transition is continued, and the commanded storage space is renewed. 2. The positioning control method for a changer device according to claim 1, wherein positioning is performed as a proper target. 3. A changer device capable of storing a recording medium in a plurality of storage spaces disposed in one direction and capable of moving in the direction of disposition facing an opening of the storage space by an external command. A control method for identifying and positioning each opening in an opening of a target storage space relatively determined from a predetermined reference position, wherein the positioning of the changer device is performed until the target is reached. The positioning is performed in multiple stages of positioning and fine positioning that accurately converges to the target position.When a command to move to a different storage space is received during the fine positioning of the storage space targeted in advance, the fine positioning is completed. And then shifting the designated storage space as a new target and positioning the storage space at the opening thereof.