JPS6357868B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk transport mechanism in an autoloading player that is capable of automatically setting a disk on a turntable.

Various autoloading players have been proposed in the past, but many of them have large mechanisms because they require a large space for loading and unloading disks. Furthermore, when loading and unloading a disk, it is common to hold the disk by applying a radial force to the disk and clamping it, but if the disk clamping means is biased by a spring or the like, Due to differences in the size of the disk due to the type of disk or dimensional errors during processing, a holding force greater than necessary is applied to the disk, causing the disk to become deformed. Furthermore, it is difficult to reliably position the center hole of the disk on the spindle of the turntable when the disk is transported, which makes the mechanism complicated.

The present invention has been made in view of the above, and it is an object of the present invention to provide a transport mechanism for an autoloading player that has a simple configuration, allows easy positioning of a disk with respect to a turntable, and has high accuracy.

The conveyance mechanism for an autoloading player according to the present invention is configured to position the center hole of the disk by bringing the outer periphery of the disk into contact with a protrusion provided on the disk conveyance path.
It includes a drive roller and a driven roller that convey the disk by holding it therebetween, and is configured to facilitate positioning of the disk by making the friction coefficients of these rollers different from each other.

Preferably, by setting the friction coefficient of the driven roller to be lower than that of the driving roller, the disk can be positioned more reliably.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic plan view of an embodiment according to the present invention, FIG. 2 is a schematic side view of FIG. 1, and FIG. 3 is a schematic side view including a partial cross section during disk transportation. . In the figure, pick-up arm 1,
An automatic mechanism 2 that automatically leads in or returns the disc, a transport mechanism 3 that transports the disc, a positioning mechanism 4 that positions the center hole of the transported disc, and a guide plate 5 that forms an insertion slot into which the disc is inserted. The upper guide 6 and the turntable section 7 are fixed to side plates 8a, 8b, a lower chassis 9, and an upper chassis 10, respectively, to constitute a mechanism main body, and these are integrally assembled into a housing 11.
For example, coil springs 12a, 12b
It is elastically supported by Furthermore, the insertion opening formed by the guide plate 5 and the upper guide 6 is connected to the housing 1.
It protrudes to the outside from the opening 11a of 1.

A central shaft 13, which is the center of rotation of the disk, is fixed to the lower chassis 9, and a flywheel 14 is rotatably fitted to the central shaft 13. The flywheel 14 is rotationally driven by a phono motor M ₁ 16 via a belt 15 . A turntable 17 is fitted into the flywheel 14 so as to be vertically movable while being prohibited from rotating, and is biased upwardly by a spring 18 with a force at least greater than the weight of the disk. Also,
As shown in FIG. 4, an adapter 18 for use during playback of a 45-rpm disc is attached to the center of the turntable 17 so as to be retractable with respect to the turntable surface, and is attached by a spring 19 in the direction of protrusion with a small force. Forced. This adapter 18 protrudes by the force of the spring 19 when playing an EP record (a) and is inserted into the center hole of the record, and when playing an LP record (b).
Since the center hole is small, the weight of the record causes it to be accommodated within the surface of the turntable. Above the central axis of the turntable 17, that is, the spindle 17a, a clamper 20, which has a tapered part 20a and a recessed part 20b into which the adapter 18 can be fitted, is supported by an angle 21 having a hole with an inner diameter approximately equal to the large diameter end of the tapered part 20a. has been done. This clamper 20 cooperates with the turntable 17 to clamp the disk near the center hole, and is raised by the turntable 17 to move around the steel ball 22 which has come into contact with the frame 65. Rotate.

Drive rollers 23a, 23 are provided on the side plates 8a, 8b.
A drive shaft 25 to which b, 23c and a gear 24 are integrally fixed is rotatably attached, and this drive shaft 25 is connected to a transport motor M ₂ 2 via a gear 26.
Rotationally driven by 7. Furthermore, side plates 8a, 8b
has a support plate 29a, 2 to which a shaft 28 is fixed at one end.
9b are each rotatably supported. Axis 2
For example, two driven rollers 30a, 30b are rotatably attached to shaft 25, 2, as shown in FIG.
Drive rollers 23a, 23b, 2 in the axial direction of 8
They are arranged alternately with 3c. Also,
The driven rollers 30a, 30b are the driving rollers 23a~
It is made of a material with a lower coefficient of friction than 23c. As described above, the transport mechanism 3 that automatically transports the disk is configured. In such a conveyance mechanism 3, when the disk is ejected, the driven rollers 30a, 30b descend to a position overlapping the driving rollers 23a to 23c by completing conveyance of the disk. As a result, the support plate 29a rotates clockwise in the figure, and the ejection detection switch S ₁ is activated at its rear end to detect the completion of ejection of the disk.
Turn on. FIG. 5 shows a schematic perspective view of the transport mechanism 3.

A stage 32 is fixed to a rotatable shaft 31 that penetrates the side plates 8a and 8b. At the tip of the stage 32, there is a rising portion 32 that can protrude to a slightly higher position than the guide plate 5, which serves as a stand when inserting the disk.
A is provided, and an insertion detection switch _S2 for detecting insertion of a disk is fixed approximately at the center of this rising portion 32a. As shown in FIG. 8, this insertion detection switch _S2 is turned on and off by an actuator 33 which is pressed by the outer periphery of the disk inserted from the vertical surface of the rising portion 32a toward the insertion opening. The stage 32 is urged counterclockwise in the figure by a spring 34, and this urging force causes the rising portion 32a to protrude from the surface including the guide plate 5 and the upper chassis 10, and also causes the output of the insertion detection switch _S2 to The structure is such that the down plunger P ₁ 35, which operates based on the above, is used to lower the plunger P 1 35 accordingly. That is, in the rest state, the spring 34 is activated as shown in FIG.
Due to the biasing force (plunger 35 is turned off), the rising portion 32a rises to cut off the disk conveyance path, and upon engagement with the inserted disk, the insertion detection switch _S2 is turned on and the down plunger _P13 is turned on.
5 is excited, the rising portion 32a is lowered to open the disk transport path.
In order to prevent double loading, even if a second disk is inserted and detection switch S ₂ is activated during playback, the down plunger P ₁ is not activated due to the circuit.
35 is configured not to be excited. Also, when the stage 32 descends, the turntable 17
The stage 32 has a pin 3 that can come into contact with the flange portion 17b of the turntable 17 in order to lower the stage 32.
6a and 36b (shown in the fourth figure), and further provided with a pin 55 for abutting on the support plates 29a and 29b when rising to rotate them counterclockwise in the figure. _S3 is a descent detection switch for detecting that the descent operation of the stage 32 is completed.

An upper chassis 10 supported at the same height as the guide plate 5 is equipped with a pick-up arm 1 and an automatic mechanism 2 for driving it, and select shafts 37 and 38 are rotatably attached thereto. Guide pins 39a, 39b and a hook 40 for positioning a 17 cm record are fixed to the select shaft 37 so as to maintain a fixed position, and similarly, guide pins 41a, 41b and a hook 40 for positioning a 25 cm record are fixed to the select shaft 38. A hook 42 is fixed. These guide pins 39a, 39
b, 41a, and 41b have their upper ends protruding above the chassis surface through holes formed in the upper chassis 10. Note that guide pins 43a and 43b (43b not shown) for positioning a 30 cm record disc are fixed to the upper chassis 10. These guide pins constitute a positioning mechanism 4 for positioning the center hole of the disk. Both the select shafts 37 and 38 are biased to rotate in a direction in which the guide pins 39a, 39b and 41a, 41b fall counterclockwise by biasing means (not shown) such as a spring. Also,
A pair of select plates 44a, 4 are provided on the select shafts 37, 38 symmetrically with these as guide axes.
4b (44a not shown) is slidably engaged and biased outwardly by a spring 45.

As shown in FIG. 6, the select plate 44b is formed with cam holes 46 and 47 that engage with the lower ends of the guide pins 39b and 41b, respectively, and a connecting lever 48b rotatably supported on the lower chassis 9.
It is provided with a pin 49 that engages one end of the . When playing a 17 cm record, the cam holes 46 and 47 engage the lower ends of the guide pins 39b and 41b with their flat surfaces 46a and 47a, respectively, to restrict their rotation. When playing a 25 cm record, the select plate 44b moves to a position corresponding to the size of the record as shown in FIG. Maintain rotation regulation. Furthermore, 30
When a cm record is played back, the selection plate 44b moves further, so that both the cam holes 46 and 47 release the restriction on the rotation of the guide pins 39b and 41b. The other end of the connecting lever 48b engages with a wing 51b which is rotatably supported by the lower chassis 9 and rotated according to the outer diameter of the disk 50 being transported, and is interlocked with this wing 51b. . Although these are structures related to the select plate 44b, a connecting lever 48a and a wing 51a are similarly provided on the select plate 44a side (not shown). Wings 51a and 51b are urged outward by springs 52, respectively.

Further, a switch stand 53 is attached to the upper chassis 10 so as to be movable in the disk transport direction. This switch stand 53 is located on the disk transport path and is equipped with a position detection switch S4 that engages with the outer periphery of the disk whose center hole has been positioned by the positioning mechanism ₄ to detect completion of disk positioning. and is biased rearward by a spring 54, which will be described later. The switch base 53 has a select shaft 3 as shown in FIG.
It is provided with tongue pieces 53a and 53b which can be respectively engaged with the hooks 40 and 42 fixed to the hooks 7 and 38, and end parts 53c and 53d which can be respectively engaged with the rising parts 40a and 40b of each hook.
This switch stand 53 is in a position corresponding to a 17cm record when it is not in use, that is, in a position where it engages with the hook 40 and turns on the position detection switch _S4 by the outer periphery of the positioned 17cm record (at this time, the Pins 39a and 39b have rising edges). When playing a 25 cm record disc, the select shaft 37 rotates to retract the guide pin 39b corresponding to a 17 cm record disc from the disc transport path, and the hook 40 also rotates, so the switch base 53 is connected to the hook 40. Disengaged, 25cm
It is moved back to a position where it engages with a hook 42 corresponding to a record. Furthermore, when playing a 30cm record, the select shaft 38 rotates and disengages from the hook 42, so that it moves further rearward and stops at a position corresponding to the 30cm record.

A pin 56 is provided at the rear end of the switch base 53, and this pin 56 engages one end of a reset lever 57 rotatably supported on the upper chassis 10. The reset lever 57 is biased clockwise in the drawing by the spring 54 mentioned above and is driven counterclockwise in the drawing by the reset plunger P ₂ 58. The plunger 58 is energized to return each mechanism to its original position, that is, a position corresponding to a 17 cm record disc, based on the output of the ejection detection switch _S1 , which detects the completion of disc ejection after the end of playback. Reset plunger 58
is excited, the switch base 53 moves forward and the select plate 44b slides outward, and when the select plate 44b returns to its original position, a reset button is used to detect the completion of resetting of each mechanical section. Turn on detection switch _S5 . In response to the output of this reset detection switch _S5 , the plunger 58
will be de-energized.

The automatic mechanism 2 that automatically leads in or returns the pick-up arm 1 includes an automatic mechanical motor M ₃ 59 as a power source, a cam 60 that rotates in conjunction with the motor, and a cam 60 that engages with this cam 60 during lead-in and return. It has a known configuration consisting of an automatic mechanism switch _S6 for discriminating the inside, a rod 61 for connecting the cam 60 and the pick-up arm 1, and an index cam 62 for determining the lead-in position of the pick-up arm 1 according to the size of the record. There is a detailed explanation of its operation will be omitted. The index cam 62 in this automatic mechanism 2 is 17
cm, 25cm, and 30cm record discs, respectively, are provided with step cams 62a, 62b, and 62c, and depending on the rotation angle, one of the step cams is positioned on the rotation trajectory of the member that is linked to the pick-up arm 1. is configured to do so. This index cam 62 is urged clockwise in the figure by a spring 63, and one end thereof engages with a select cam 64 provided integrally with the switch base 53, and the rotation angle is determined by this select cam 64. be done. That is, the select cam 64 has step cams 64a, 64b, and 6 corresponding to the size of the record.
4c, and determines the rotation angle of the index cam 62 according to the amount of movement of the switch base 53. Note that the switch _S7 (shown in the second diagram) is an eject switch that is operated when stopping the performance midway through.

The operation of this configuration will be explained below.

When performing a performance, a record is inserted into the apparatus (shown in the second figure) which is in a rest state through the insertion slot. At this time of insertion, the record is inserted into the guide plate 5 and the upper guide 6.
Guided by. The inserted record is number 8
If the position is extremely eccentric as shown by the dashed line A in Figure a, not only will the actuator 33 and the insertion detection switch _S2 not operate, but the stage 3
Further pushing is prevented by the rising portion 32a of No. 2. Only when the record is inserted approximately at the center as _shown by the dashed line B in FIG. Normally, the record disc is guided by the wings 51a and 51b and can be positioned approximately in the center. Furthermore, by displaying the insertion position of, for example, a 17 cm record on the front panel of the player main body, as shown in FIG. 8b, it is possible to easily insert the record at approximately the center.

When the phono motor M ₁ 16 begins to rotate in response to the ON output of the insertion detection switch S ₂ , the down plunger P ₁ 35 is energized and the stage 32 is lowered. As a result, the rising portion 32a, actuator 33, switch _S2, etc. that were blocking the conveyance path of the record are retracted from the conveyance path and opened.
At the same time, the stage 32 has pins 36a and 36b (shown in the fourth figure) connected to the flange portion 17 of the turntable 17.
By engaging with b, the turntable 17 is lowered, and since the pin 55 provided at the tip thereof is also lowered, the support plates 29a, 29b and the driven rollers 30a, 30b attached thereto are also lowered. The descended driven rollers 30a and 30b clamp the inserted record in cooperation with the driving rollers 23a to 23c. When the descending operation of the stage 32 is completed, the descending detection switch _S3
is turned on, the conveyance motor M2 ₂₇ rotates in response to the output of this switch _S3 , and the drive rollers 23a to 23c and driven roller 30 that respond to this rotate.
a and 30b rotate in the direction of the arrow in FIG. 3 to carry in the record.

If the record disc carried in is, for example, a 25 cm record disc, the wings 51a, 51b are pushed apart by the outer periphery of the record disc, as shown in FIG. As a result, the select plates 44a, 44b are driven via the connecting levers 48a, 48b and slide inward. Although a description of the operation of the select plate 44a (not shown), which is provided symmetrically with the select plate 44b, will be omitted below, it operates in the same way as the select plate 44b. When the select plate 44b slides,
The cam hole 46 formed in this releases the rotation restriction of the guide pin 39b for a 17 cm record, as shown in FIG. However, the cam hole 47 is located at a position that restricts the rotation of the guide pin 41b. Therefore, the guide pin 39b rotates clockwise and falls down, but the guide pin 41b remains in an upright state.

When the select shaft 37 rotates, the hook 40 fixed thereto also rotates, so that the engagement between the tongue piece 53a of the switch base 53 and the hook 40 is released as shown in FIG. With this, the switch stand 53
is energized by the spring 54 via the reset lever 57, so it moves rearward and stops at the position shown by the two-dot chain line in FIG. .
This stop position is a position where the position detection switch _S4 engages with the outer periphery of the record and operates when the center of the record and the center of the turntable 17 substantially coincide.

When the switch base 53 moves backward, the select cam 64 provided integrally therewith also moves. As a result, the engagement pin of the index cam 62 moves from the cam surface 64a of the select cam 64 corresponding to a 17 cm record to the cam surface 64b corresponding to a 25 cm record. The moving angle is determined.

The record conveyed by the conveyance mechanism 3 initially comes into contact with one of the guide pins 41a and 41b, and as the record is further conveyed, its center position is corrected, and both guide pins 41a and 41b are corrected.
The position detection switch _S4 is turned on at a position where the turntable 41b substantially contacts the turntable 41b, that is, a position where the center of the turntable 17 substantially coincides with the turntable 17. In the movement of the record with such horizontal movement, the driven rollers 30a and 30b are attached to the shaft 28 so as to be able to rotate independently, and the driven rollers 30a, 30
Since the coefficient of friction of b is set lower than that of the driving rollers 23a to 23c, slippage between the driven roller and the disk becomes easy during disk transportation.
Therefore, the disk can be easily moved from side to side,
The positioning of the disk with respect to the turntable can be performed smoothly, easily, and reliably.

When the positioning of the center hole of the record is completed, the position detection switch _S4 is turned on, and the excitation of the down plunger _P1 35 is released. As a result, the stage 32 is raised by the force of the spring 34, and the turntable 17 is also raised by the force of the coil spring 18, and the spindle 17a is inserted into the center hole of the record as shown in FIG.
After the stage 32 is inserted, a pin 55 provided at the tip of the stage 32 comes into contact with the support plates 29a and 29b and lifts them up. By selecting the dimensions so that the support plates 29a and 29b are driven upward at such a timing, that is, after the spindle 17a is inserted into the center hole of the record, the spindle 1
Even when a record is engaged with the tapered portion of 7a, the driven rollers 30a and 30b press against the record, so the record will not be lifted up unexpectedly and the spindle 17a will reliably fit into the center hole of the record. It will be inserted into. As the driven rollers 30a and 30b are further lifted, they are retracted from the record surface, and the turntable 17 also rises, lifting the record from the conveyance path. Note that after the spindle 17a is inserted into the center hole of the record, the driven roller 30
Since the positions of the fulcrum and point of action are selected so that a and 30b rise at a faster speed than the rise of the turntable 17, they no longer come into contact with the record surface when rising.

The turntable 17 that has been lifted up with the record placed thereon has a clamper 20 suspended above it.
After the spindle 17a is inserted into the center hole of the clamper 20, the clamper 20 is further lifted until the steel ball 22 comes into contact with the frame 65 as shown in FIG. Here, since the tapered part 20a of the hanging clamper 20 is fitted into the hole of the angle 21, the clamper 20 can be reliably coaxial with the spindle 17a by ensuring the accuracy of the fixing position of the angle 21. After the clamper 20 is raised, its tapered portion 20a is at an angle 21 as shown in FIG.
the stage 32 and the pin 36.
In order for a and 36b to rise to the positions shown in the figure, the turntable 17, the record and the clamper 20 are used.
is not prevented from rotating. At this time, if the imported record is an LP with a small center hole, the adapter 18 is pressed by the record and automatically sinks into the turntable 17, as shown in FIG. 4b, and the spindle 17a is inserted into the center hole. However, in the case of a large center hole EP, the adapter 18 is inserted into the center hole instead of the spindle 17a for positioning, as shown in FIG. 4a.

After the clamping of the record is completed, the automatic mechanism 2 performs a lead-in operation of the pickup arm 1. At this time, as described above, since the rotation angle of the index cam 62 is automatically determined according to the size of the record into which it has been inserted, there is no need to set the size from the outside. In this way, the pick-up arm 1 is placed on the playing start position corresponding to the size of the record, and since the phono motor _M1 16 has been rotating since the time the record was inserted, the play is started. During performance, the stage 32, driven rollers 30a, 30b, etc. are in exactly the same state as during the rest period shown in FIG. Furthermore, the circuit for driving the down plunger P ₁ 35, including the insertion detection switch S ₂ , is prohibited from operating during the performance. Therefore, even if a second record is accidentally inserted during a performance, it is blocked by the actuator 33, switch _S2 , and the rising portion 32a of the stage 32, thereby preventing damage to the record due to malfunction. can.

Next, when a command to end the performance is issued by turning on the known performance end detection means or the ejection switch _S7 for instructing to stop the performance, the motor _M359 in the auto mechanism 2 starts rotating again and the pick-up is started. Return arm 1. The down plunger P ₁ 35 is energized again by the signal indicating the completion of the return or the completion of the raising of the arm 1.
As a result, the stage 32 is lowered, and the spindle 17a or adapter 18 inserted into the center hole of the record is pulled out by an operation opposite to that when clamping the record, and further the drive rollers 23a to 23c are removed.
The record is held between the driven rollers 30a and 30b.

At the same time as the descent detection switch S ₃ detects the completion of the descent of the stage 32, the conveyance motor M ₂ 27 rotates in the opposite direction to that at the time of loading, and the drive roller 23 responds to this rotation.
a to 23c and driven rollers 30a and 30b are the first
Rotate in the direction of the arrow in Figure 1a to take out the record. When the ejection of the record is completed, the support plate 29a, whose rotation was restricted by the record during transportation,
29b rotates to a position where the driven rollers 30a and 30b overlap the driving rollers 23a to 23c, and the first
As shown in Figure 1b, turn on the discharge detection switch _S1 at the rear end with a sufficient stroke.
Generally, it is accepted that the thickness of a record disc is as thin as 0.6 mm, but with this configuration, even when such a thin record disc is used, it is possible to reliably identify the ejection of the record disc.

In response to the discharge completion signal from the discharge completion detection switch _S1 , the transport motor _M2 27 is stopped and the down plunger P1 ₃₅ is also turned off. As a result, the stage 32, turntable 17, driven rollers 30a, 30b, etc. return to the state shown in FIG. 2. At the same time, the reset plunger P ₂ 58 is energized and drives the switch base 53 via the reset lever 57 to a position corresponding to a 17cm record.
That is, it is returned to the original position shown in FIG. At this time, the switch base 53 has its ends 53c and 53d connected to the respective rising portions 40a and 40b of the hooks 40 and 42.
The guide pins 39a, 39b and 41 which are fixed together via the select shafts 37 and 38 are rotated by pressing them respectively.
a and 41b are also rotated. As a result, the select plates 44a and 44b become free, so the spring 4
The coupling lever 4 slides outward by the force applied by the lever 5.
8a, 48b and wings 51a, 51b as the first
At the same time as returning to the position shown in the figure, reset detection switch _S5 is turned on. When this state is reached, the guide pins 39a, 39b, 41a, 41b and hooks 40, 42 are inserted into the cam hole 46 of the select plate so that they will no longer rotate unless a record is inserted.
Rotation is restricted by 47. The reset plunger is activated in response to turning on the reset detection switch _S5 .
Power to P ₂ 58 is cut off, but hook 4 has already been turned off.
0 is prevented from rotating, the switch base 53 stops at a position corresponding to the 17cm record disc where the tongue piece 53a and the hook 40 engage. As a result, each mechanical section completely returns to its original position shown in FIGS. 1 and 2, and the operation ends.

As shown in FIG. 2, the ejected record disc 50 is supported by the guide plate 5 and the upper guide 6, so that it will not accidentally fall out of the player body, and will not be a hindrance to the user's removal.

The above description has focused on the case of playing a 25cm record, but the same operation can be performed for records of other sizes, only the corresponding positioning member is changed.

As described in detail above, according to the present invention, the plurality of driven rollers in the disk transport mechanism have a lower coefficient of friction than the drive roller, and each is independently rotatably supported. The directional movement becomes easy, and the positioning of the disk with respect to the turntable can be performed smoothly, easily, and reliably.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of an embodiment according to the present invention;
Fig. 2 is a schematic side view thereof, Fig. 3 is a schematic side view including a partial cross section showing the disk conveyance state, and Fig. 4 is a sectional view of the turntable section, where a is when playing an EP record, and b is a sectional view of the turntable. Figure 5 shows a schematic perspective view of the conveyance mechanism, Figure 6a shows when an LP record is being played.
is a schematic plan view of the positioning mechanism, b is a schematic sectional view thereof, FIG. 7 is a perspective view showing the positional relationship between the positioning mechanism and the switch base, FIG. 8a is a diagram for explaining the operation of the disk insertion detection section, b is a perspective view showing the player body when the disk is inserted, FIG. 9 is a view for explaining the operation of the switch base, FIG. 10 is a view showing the timing of fitting the spindle into the center hole of the disk and raising the driven roller, FIGS. 11a and 11b are diagrams for explaining the operation at the time of disc ejection. Explanation of symbols of main parts, 1...Pickup arm, 2...Auto mechanism, 3...Transport mechanism, 5...
...Guide plate, 6...Upper guide, 9,10...Chassis, 16,27,59...Motor, 17...
Turntable, 18...adapter, 20...clamper, 23a-23c...drive roller, 29
a, 29b... Support plate, 30a, 30b... Driven roller, 32... Stage, 35, 58... Plunger, 37, 38... Select shaft, 39a,
39b, 41a, 41b, 43a, 43b... Guide pin, 40, 42... Hook, 44a, 44
b...Select plate, 46, 47...Cam hole, 48
a, 48b...Connection lever, 50...Disk,
51a, 51b...wing, 53...switch stand, 57...reset lever, 62...index cam, 64...select cam, _S1 to _S7 ...switch.

Claims (1)

[Claims] 1. In an autoloading player that positions the center hole of a disk by bringing the outer periphery of the disk into contact with a protrusion provided on a disk transport path, first and second disks that hold the disk; A conveyance mechanism that includes a roller and conveys a disk by driving the first or second roller, wherein the first roller is a driving roller, the second roller is a driven roller, and the driven roller A conveyance mechanism for an autoloading player, characterized in that a friction coefficient of the drive roller is set lower than a friction coefficient of the drive roller. 2. The conveyance mechanism for an autoloading player according to claim 1, wherein the driven rollers are each composed of a plurality of rollers that can rotate independently.