JPH0346906B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a disc playing device, and more particularly to a disc playing device that can accommodate a plurality of discs and can sequentially select any of the stored discs for continuous performance. BACKGROUND ART Various disc playing devices capable of playing a plurality of discs in succession have already been proposed and used, but basically there is a disc storage section for storing a plurality of discs arranged in order at a predetermined pitch, and a turntable. It is equipped with a disk playing means including a table, a pick-up, etc., and a disk take-out and conveyance mechanism that sequentially selects and grasps arbitrary disks in the disk storage section and conveys them to the playing position, that is, onto the turntable. This disk ejecting and conveying mechanism usually includes a base that moves along the disk arrangement direction of the disk storage section, and a disk grip that is provided on the base so as to be movable in a direction substantially perpendicular to the disk arrangement direction and that grips a selected disk. and disk presence/absence detection means for detecting the presence or absence of a disk at each disk storage position of the disk storage section. In previously proposed disk playing devices, the disk presence/absence detection means is configured to detect the presence or absence of a disk based on a difference in the downstroke of a tone arm, which is a component of the pickup. That is, this method takes advantage of the fact that the amount of down movement of the tone arm when there is no disk on the turntable is greater than when the disk is on the turntable. However, in the disk presence/absence detecting device having such a configuration, the presence or absence of the disk cannot be detected until the disk is conveyed onto the turntable. Therefore, when playing several discs in succession, even if the disc to be played is not in the disc storage position, the above-mentioned disc ejecting and transporting mechanism carries out the transport operation, and the disc is moved to the next disc storage position. The drawback was that time was wasted before a particular disc could be played. OBJECT OF THE INVENTION The present invention has been made in view of the above-mentioned points, and its object is to provide a disk playing device in which the presence or absence of a disk can be quickly detected, and therefore no time is wasted in playing the disk. It is to provide. Structure of the Invention As is clear from the conceptual diagram of the mechanism in FIG. 11, the disk playing device according to the present invention includes a disk storage section capable of sequentially arranging and storing a plurality of disks, a disk playing means, and an arbitrary disk storage section in the disk storage section. and a disk ejecting and transporting mechanism that sequentially selects and transports the discs to a performance position, and the disk ejecting and transporting mechanism includes a base that is movable along the disk arrangement direction of the disc storage section, and a base that is attached to the base approximately in the disk arrangement direction. a disk gripping means that is provided movably in a vertical direction and grips a selected disk; and a disk presence/absence detection means that detects the presence or absence of a disk at each disk storage position of the disk storage section; A positioning protrusion is provided at the position to position the storage disk by protruding in the disk arrangement direction and fitting into the disk center hole, and the disk ejecting and conveying mechanism moves the disk by a predetermined distance in the disk arrangement direction. The disk is transported after at least releasing the fitted state between the disk center hole and the positioning protrusion, and the disk presence/absence detecting means is provided in the disk storage portion corresponding to each of the disk storage positions, and the disk presence/absence detection means is provided in the disk storage portion corresponding to each of the disk storage positions, and is configured to detect the presence or absence of a disk. a moving member that moves between a first position and a second position in response to the movement of the moving member; a first detection sensor that detects whether the disc is in a position or a second position; and a first detection sensor that moves together with the base when the base is moved by the predetermined distance from a position where the disc gripping means can grip the disc. and a second detection sensor that detects whether the moving member is in either the first position or the second position. Embodiments Hereinafter, a disc playing device as an embodiment of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 1 designates the entire disk performance apparatus which prepares a plurality of information recording disks such as video disks and performs selectively. As shown in FIG. 1, the housing 2 as a whole is formed, for example, in the shape of a rectangular parallelepiped, and a window is provided on the front side of the housing, which is biased to the left, through which a disk can be taken in and taken out of a disk storage section, which will be described later. ing. However, the left side referred to here is, for example, the direction toward the front indicated by the arrow Y in FIG. 2, which is indicated by the arrow X. Further, the direction of arrow Z is upward. The above-mentioned window for putting in and taking out the disk is formed over almost the entire length of the housing 2 in the vertical direction, and a door 3 is provided to close the window.
is provided. Almost the entire surface of the door 3 is made of a transparent glass plate 3a, etc., so that the mechanism of the housing 2 can be seen from the outside of the housing.
Note that an operating section 5 for operating the disc playing device is placed on the housing 2. The operation unit 5 includes an adjustment unit 6 for adjusting the volume, etc.
It has a music selection part 7 including a keyboard 7a for selecting music, and a coin receiving part 8 for receiving coins is arranged on the left side of the adjustment part and the music selection part. Furthermore, casters 10 are provided on the bottom surface of the housing 2 to facilitate transportation of the disc playing device. As shown in FIG. 2, the housing 2 has an underbase 11 forming the bottom of the housing and a frame 12 as a pivot. This frame 12 is made of lightweight angle iron or the like. Inside the housing 2, the window for loading and unloading the disk is located at the back, that is,
A plurality of disks 1 are installed on the rear left side of the housing.
A disk storage section 16 is provided in which disks 5 can be arranged and stored in order at a predetermined pitch. In this case, the plurality of disks 15 are arranged and housed in the vertical direction (arrow Z direction and the opposite direction). Note that these disks 15 are called optical disks that record and read signals using, for example, laser light. As is clear from FIGS. 3 and 4, the disk storage section 16 has a large number of disk carrying units 17 stacked on top of each other in the disk arrangement direction. 3 shows the uppermost layer of the disk storage section 16, and FIG. 4 shows the lowermost layer of the disk storage section 16. As shown in FIG. 3, each disk carrying unit 17 consists of a plate member 18 having two sides 18a and 18b perpendicular to each other and having a semicircular disk storage portion 18c on its main surface. disk 15
is a positioning protrusion 1 protruding from the main surface of the plate-like member.
The disk is positioned and housed by fitting the center hole of the disk into the hole 8d. In order to reduce the weight of this plate member 18, the apex portions 18 of the two sides 18a and 18b are
e is cut into a roughly triangular shape. As is clear from the figure, the extensions of the two sides 18a and 18b and the extension of the diameter D of the semicircular disk storage portion 18c form a right triangle. Each disk carrying unit 17 has the two sides 18a, 18
A single shaft 20 is fitted near the apex of b. Further, a pair of shafts 21 and 22 are fitted into each disk carrying unit 17 near the ends of two sides 18a and 18b, respectively. Second
As shown in the figure, each shaft 20, 21, and 22 is fixed to the underbase 11 at its lower end. Each of these shafts 20, 21 and 2
2 constitutes an anti-slip means for preventing each disk carrying unit 17 from slipping. As shown in FIG. 4, each disk carrying unit 17 is stacked on a receiving plate 24 provided near the lower ends of shafts 20, 21 and 22. As shown in FIG. This receiving plate 24 is fitted onto each of the shafts 20, 21, 22, and its downward movement is restricted by three retaining rings 24a. As shown in FIG. 3, on top of each stacked disk carrying unit 17 is a presser plate 25 that fits into the shafts 20, 21, 22.
is provided. For example, a nut 26 is screwed into the first threaded portion 20a at the upper end of the shaft 20.
Nuts 26 are similarly screwed into the upper ends of the other shafts 21 and 22. A coil spring 27 is provided between the nut 26 and the holding plate 25.
is compressed through a washer 27a. The receiving plate 24 and the holding plate 25
The nut 26, the coil spring 27, and small peripheral members related thereto constitute a pressing means for pressing each disk carrying unit 17 in the stacking direction. It should be noted that this pressing means and the above-mentioned anti-slip means consisting of the shaft 20 and the like are included in the disk storage section 16. As is clear in FIG. 2, an upper base 29 is provided further above the presser plate 25 provided above each of the stacked disk carrying units 17.
It is fixed by a nut 30 to a second screw portion 20b (shown in the third figure) formed at the uppermost end of the screw. As shown in FIG. 2, the underbase 11
A disc playing means for playing the disc, which includes a turntable 31, a spindle motor 32, an optical pickup 33, etc., is arranged approximately in the center of the disc. This disk playing means has approximately the same structure as the disk playing means included in the front loading disk player filed by the applicant in Utility Application No. 58-169560, for example, and the detailed structure thereof will not be described in detail here. Not mentioned. Next, any one of the plurality of disks 15 arranged and stored in the disk storage section 16 is sequentially selected and placed at the performance position, that is, on the turntable 3.
The disk ejecting and conveying mechanism for conveying the disk onto the disk 1 will be explained. As shown in FIG.
A pair of guide shafts 36 and 37 are provided as guide members extending along the disk arrangement direction, that is, in the vertical direction, and are fixed to the underbase 11 at the lower end. Further, the upper end portions of both guide shafts 36 and 37 are fixed to an upper base 29. A base 40 is slidably attached to both guide shafts 36, 37. Both guide shafts 36 and 37
extends along the front surface of the housing 2, so that the base 40 moves near the front surface of the housing where the window for loading and unloading disks is provided. As is clear from FIG. 5, the base 40 is formed as a single straight bar as a whole. Describing in detail how the base 40 is attached to each of the guide shafts 36 and 37, the base is slidably and closely fitted to the guide shaft 37 at a cylindrical portion 40a provided approximately at the center in the longitudinal direction of the base. The left end portion is slidably engaged with the guide shaft 36 via a pair of rollers 41a, 41b made of ball bearings or the like. Of the pair of rollers, the front roller 41a is provided at the swinging end of a lever 41c that is swingably attached to the base 40 in a plane perpendicular to the direction of movement of the base. This lever 41c is biased in a direction in which the roller 41a approaches the guide shaft 36 by a coil spring 41d. As is particularly clear in FIG. 6, a small spindle 43b is rotatably provided on the underbase 11 via a bracket 43a, and a pair of toothed belt wheels 4 are provided at both ends of the small spindle.
3c and 43d are fitted respectively. A motor 44 is fixedly installed near the bracket 43a via a fixing plate 44a, and a toothed belt 46 is connected to a toothed belt pulley 44b and a toothed belt pulley 43d fitted to the output shaft of the motor. It is being constructed.
On the other hand, there is also a bracket 29a on the upper base 29.
and the toothed belt pulley 2 via the small spindle 29b.
9c is rotatably attached, and a toothed belt 47 is installed between the toothed belt wheel 43c and the toothed belt wheel 29c. A portion of the toothed belt 47 is fixed to the base 40. That is, by rotating the motor 44 in the forward and reverse directions, the base 40 is reciprocated up and down. As shown in FIGS. 2 and 6, the base 4
A rail 49 as a guide member is provided in front of the guide shaft 37 and parallel to the guide shaft 37. The rail 49 is formed to have a substantially C-shaped cross section perpendicular to its longitudinal direction, and a counterweight 50 is fitted into the internal space of the rail so as to be movable in the vertical direction. As is clear from FIG. 6, the counterweight 50 has a rail 4
The base 40 is connected to the base 40 by a wire 53 installed between pulleys 51 and 52 provided in pairs at the upper and lower ends of the base 9. That is, the counterweight 50 is guided by the rails 49 and moves relative to the base 40. As shown in FIG. 6, a pair of swinging members 55 are provided at one end of the counterweight 50 that engages with the rail 49, that is, the right side, and are spaced apart from each other in the direction of movement of the counterweight. , is attached via a bracket 55a so as to be swingable in the direction of movement of the counterweight. A pair of rollers 56 that come into contact with the inner surface of the rail 49 are provided at the swinging end of each swinging member 55 . Further, a single coil spring 57 is provided between the pair of swinging members 55, and both swinging members 55 are biased toward each other by the coil spring. counterweight 50
A roller 59 that comes into contact with the inner surface of the rail 49 is rotatably attached to the other end that engages with the rail 49, that is, the left end, via a bracket 59a. The pair of swinging members 55 described above, the pair of rollers 56, the coil spring 57, and the roller 59
These and related small peripheral members constitute a contact means for bringing the counterweight 50 into close contact with the rail 49, which is a guide member. As shown in FIGS. 2 and 5, the base 4
0 is provided with a guide shaft 61 that extends in a direction perpendicular to the direction in which the disks are arranged in the disk storage section 16, in this case in the left-right direction. Figures 7 and 8
As is particularly clear in the figure, a movable chassis 64 formed by connecting two divided chassis 62 and 63 to each other is slidably attached to the guide shaft 61. As shown in FIG. 5, a pair of toothed belt wheels 66a and 66b are provided at the right and left ends of the base 40.
is rotatably provided, and a toothed belt 67 is installed on both toothed belt wheels. A motor 68 is fixed near the right toothed belt wheel 66b via a bracket 68a, and a worm 68b fitted to the output shaft of the motor is a worm integrally formed with the toothed belt wheel 66b. wheel 6
It meshes with 6c. That is, the movable chassis 64 is reciprocated from side to side by the forward and reverse rotation of the motor 68. A spindle 71 extending in a direction perpendicular to the disk arrangement direction (vertical direction) of the disk storage portion 16 is rotatably attached to a movable chassis 64 consisting of two divided chassis 62 and 63 about an axis. At the left end of the spindle 71 is approximately C.
A frame 72 bent into a letter shape is fixed. The frame 72 is provided with a pair of gripping arms 73 and 74. The frame 72 and the pair of gripping arms 73 and 74 allow the disk 1
A gripping arm mechanism is configured to grip the outer periphery of 5. Note that the pair of gripping arms 73 and 74 engage with the outer periphery of the disk 15 at their respective tip ends 73a and 74a. The spindle 71 is also movable in its axial or longitudinal direction and acts as a gripping rod that grips the outer periphery of the disk in cooperation with a pair of gripping arms 73, 74. A gripping block 71a, which forms a part of the spindle, is provided at the left end of the spindle 71.
1 engages with the outer periphery of the disk 15 at this gripping block 71a. The pair of gripping arms 73 and 74 are symmetrical with respect to the longitudinal direction of the spindle 71, which acts as a gripping rod, in two mutually non-parallel directions (directions indicated by arrows A and B in FIG. 5).
It is made freely movable. A gripping block 71a provided at the left end of the spindle 71 has rack portions 71a formed on both sides in the direction of movement thereof. On the other hand, the pair of gripping arms 73 and 74 are also formed with rack portions 73b and 74b, respectively. A gear 75a is provided so as to mesh with the rack portion 71b and the rack portion 73b.
A gear 75b is provided so as to mesh with the gear 75b. Each of these rack parts 71b, 73b, 74b
and gears 75a and 75b, a spindle 71 as a gripping rod and a pair of gripping arms 73,
A drive mechanism is configured to move the parts 74 in opposite directions and synchronously with each other. Here, the tip of the spindle 71 which is the gripping rod, that is, the disk 1 of the gripping block 71a.
5 is defined as the first disc engagement point, and the engagement points of the distal ends 73a, 74a of the pair of gripping arms 73, 74 with the disc 15 are defined as the second and third disc engagement points, respectively. The distance between the second disc engagement points: La is equal to the distance between the first and third disc engagement points: Lb, and the distance between the first and second disc engagement points is equal to the distance between the first and third disc engagement points.
and a straight line connecting the third disk engagement point forms an acute isosceles triangle. The moving direction of the pair of gripping arms 73 and 74 (the direction indicated by arrows A and B in FIG. 5) is approximately parallel to the straight line connecting the center of this acute isosceles triangle and the second and third disk engagement points. It is done as it is. That is, the first, second, and third disk engagement points are moved toward the center of the disk 15 being gripped. A driving source that applies a driving force for gripping the disk to the gripping arm mechanism including the gripping arm pair 73 and 74 will be explained. As shown in FIGS. 7 and 8, a motor 77 is fixed to the movable chassis 64 in front of a spindle 71. As shown in FIGS. Motor 77 is arranged such that its output shaft is parallel to spindle 71. A screw shaft 78 that extends parallel to the spindle is rotatably provided between the spindle 71 and the motor 77, and a gear 78a fitted to the tip of the screw shaft.
However, the gear 77a fitted to the output shaft of the motor 77
It meshes with. In addition, screw shaft 78
A screw portion 78b is provided only in the central portion. A movable bracket 79 is slidably attached to a smooth portion of the screw shaft 78 other than the screw portion 78b. A projecting portion 79a is formed on the movable bracket 79, and the movable bracket 79 is connected to the right end of the spindle 71 at the projecting portion 79a. A slider 81 is screwed into the screw portion 78b of the screw shaft 78, and is movable only in the axial direction of the screw shaft. A pair of coil springs 82a are provided between the movable bracket 79 and the slider 81.
82b are provided and each fit over the screw shaft 78. In this configuration, when the motor 77 rotates forward and backward, the spindle 71 is rotated between the gears 77a, 78a, the screw shaft 78, the slider 81, and the coil spring 82.
a, 82b, and a movable bracket 79 in order to reciprocate in the axial direction. Therefore, the disk 15 is gripped and released by the gripping arm mechanism including the pair of gripping arms 73 and 74. Note that the coil spring 82a is
The gripping arm mechanism acts as a bias force applying means for applying a bias force to the slider 81 in accordance with the movement of the slider 81 after gripping the disk 15. The gripping arm pair 73,
A driving source is configured to apply driving force to the gripping arm mechanism including 74. On the other hand, a photo sensor 84 is provided near the screw shaft 78 as a detection means for detecting movement of the slider 81 after the gripping arm mechanism grips the disk 15. The above detection is performed by moving the light shielding plate 81a formed on the slider 81 within a detection gap provided on the photo sensor 84, and a signal for stopping the motor 77 is issued from the photo sensor. The screw shaft 78 and the slider 81
, coil spring 82a, and photo sensor 8
4, the gripping arm mechanism holds the disk 1.
A stopping means is configured to stop the drive source including the motor 77 when the gripper 5 is gripped. In addition,
Apart from the photo sensor 84, this stopping means is configured as a part of the driving source, but the stopping means may be provided separately from the driving source, however,
In this case, the gripping arm mechanism includes the slider 81
It is also necessary to apply a driving force to the drive source through the coil spring 82a as a bias force applying means. The story goes back and forth, but for example, as shown in FIG. 8, the pair of gripping arms 73 and 74 have elongated holes 73d and 74d formed in the pair of gripping arms, respectively, which slide onto a pin 72a protruding from the frame 72. When the pair of gripping arms 73 and 74 grip the disk 15, the outer edges of the elongated holes 73d and 74d abut against the pin 72a and the pin 72a is moved. The gripping motion of the pair of gripping arms is regulated. That is, the elongated holes 73d, 74d and the pin 72a serve as guides for the pair of gripping arms 73, 74, and act as a regulating means for restricting the gripping operation of the gripping arm mechanism including the pair of gripping arms 73, 74 when the disc is gripped. It is. Next, a drive source that applies rotational driving force to the spindle 71 and, therefore, to the above-mentioned gripping arm mechanism will be explained. As shown in FIGS. 7 and 8, a movable chassis 64 made up of split chassis 62 and 63 is provided with a holding member 87 that holds a motor 86. As shown in FIGS. The holding member 87 is swingable around the spindle 71. The motor 86 is arranged such that its output shaft intersects the spindle 71. A small spindle 88 extending parallel to the spindle 71 is rotatably attached to the holding member 87. One end of this small spindle 88,
In this case, a worm wheel 88a is attracted to the right end, and the worm wheel is attached to the motor 8.
It meshes with a worm 86b fixed to the output shaft of No. 6 via a coupler 86a. Further, a gear 88b is fixed to the other end of the small spindle 88, and this gear meshes with a gear 71b fitted near the tip of the spindle 71. Rotational driving force is applied to the spindle 71, and thus to the gripping arm mechanism, by the motor 86, coupler 86a, worm 86b, small spindle 88, worm wheel 88a, and gears 88b and 71b. A driving source is configured. On the other hand, a projecting portion 72c (shown in the eighth figure) is provided at the right end portion of the frame 72, which is a part of the gripping arm mechanism. On the other hand, as shown in FIG.
A stopper 90 is provided correspondingly. Further, a coil spring 91 that engages with the protruding portion 72c is fitted onto the stopper 90. The overhang 72c, the stopper 90, and the coil spring 91 act as regulating means for regulating the rotation of the gripping arm mechanism when the gripping arm mechanism is rotated by the drive source and reaches a predetermined rotational position. It is configured. The holding member 87 holding the motor 86 is caused to swing by the reaction force of the rotational driving force generated when the rotation of the gripping arm mechanism is restricted by the restriction means. On the other hand, a photo sensor 93 serving as a detection means for detecting that the holding member 87 has oscillated is provided near the swinging end of the holding member 87 . The above detection is performed by moving the light shielding plate 87a fixed to the swinging end of the holding member 87 within the detection gap formed in the photo sensor 93, and the motor 8
A signal to stop the photo sensor 6 is emitted from the photo sensor. A pin 87b is protruded from the light shielding plate 87a, and a movable piece 95 is fixed to the pin. The movable piece 95 is inserted into a guide portion 63a formed in the divided chassis 63 that forms part of the movable chassis 64, and reciprocates within the guide portion 63a as the holding member 87 swings. A pair of coil springs 96a and 96b are provided at both ends of the movable piece 95. These coil springs 96a, 96b are attached to the holding member 87.
acts as a bias force applying means that applies a bias force to the holding member when the holding member swings. The photo sensor 93 and the coil springs 96a and 96b serving as bias force applying means rotate the spindle 71, and therefore the gripping arm mechanism, so that the disk 15 gripped by the gripping arm mechanism is reversed. A stopping means is configured to stop the drive source including the motor 86 when this happens. Further, the movable chassis 64 described above, a spindle 71, a gripping arm mechanism including a pair of gripping arms 73 and 74, a drive mechanism including gears 75a and 75b and synchronizing the operations of the spindle and the pair of gripping arms, and a motor 77. It includes a drive source that applies a driving force to the gripping arm mechanism for gripping the disk, and a regulating means (grip arm pair 73,
74), and a stop means that stops the drive source including the motor 77 when the gripping arm mechanism grips the disk, which is comprised of a photo sensor 84 and the like as a detection means; 86, a drive source that applies rotational driving force to the spindle 71, and thus the gripping arm mechanism; and a drive source that rotates the gripping arm mechanism by the drive source and rotates the gripping arm mechanism when it reaches a predetermined rotational position. A regulating means for regulating rotation (consisting of a stopper 90 and a coil spring 91);
When the holding member 87 holding the motor 86 and the holding arm mechanism including the photo sensor 93 rotates and the disk gripped by the holding arm mechanism is reversed, the drive source including the motor 86 is stopped. base 4 by stopping means and
A disk gripping means is provided at the disk storage section 16 so as to be movable in a direction perpendicular to the direction in which the disks are arranged in the disk storage section 16, and grips and inverts a selected disk. As is clear from FIG. 8, the center axis of rotation of the pair of gripping arms 73, 74, that is, the center of the axis of the spindle 71, is in the moving direction of the disk gripping means, in this case the left and right direction (the direction of the arrow X and the opposite direction). direction) and forms an acute angle θa. The fact that the central axis of rotation of the pair of gripping arms 73, 74 is inclined with respect to the moving direction of the disk gripping means is related to the fact that the disk gripping unit 17 is formed as described above. By forming the disk carrying unit 17 in the above-described shape, it becomes easy to take in and take out the disk through the window provided on the left side of the front surface of the housing 2 for taking in and out the disk. Further, as is clear from FIG. 8, a detection switch 9 acts as a detection means for detecting that the disk gripping means grips the selected disk.
9 is provided at the tip 73a of the gripping arm 73. The detection switch 99 engages with the outer periphery of the disk when the disk is gripped. Next, a position detection means for detecting that the base 40 has reached a position where the disk gripping means can grip any disk in the disk storage portion 16 and stopping the base will be explained. As shown in FIGS. 2 and 6, a plurality of slits are formed at the right end of the rail 49 that guides the counterweight 50, and an address plate 100 is attached that indicates the absolute address of the base 40 with respect to the housing 2 in 6 bits. It is being On the contrary,
As shown in FIG. 5, a 6-bit photo sensor 101 is provided at the right end of the base 40 in correspondence with the address plate 100. Furthermore, as shown in FIG. 4, each disk carrying unit 1
A group of four bits and a slit 102 arranged along the moving direction of the base 40, that is, the vertical direction, are integrally provided with each disk carrying unit 17 at the front end of the disk holding unit 7. A 4-bit photo sensor 103 serving as a detection means is provided at the left end of the base 40 in correspondence with the slit group 102. These address plate 100, photo sensor 101, slit group 1
02 and the photo sensor 103 constitute a position detecting means for detecting that the base 40 has reached a position where the disk gripping means can grip any disk in the disk storage section 16 and stopping the base. There is. As shown in FIGS. 2 and 5, the base 4
0 is attached with an address plate 105 that extends parallel to the guide shaft 61 and has slits 105a and 105b formed at both ends. On the other hand, as is particularly clear in FIG. 7, a photo sensor 106 is provided on the movable chassis 64. The address plate 105 and the photo sensor 106 constitute a position detecting means for detecting that the movable chassis 64, and therefore the disk gripping means, have reached a predetermined position and stopping the disk gripping means. A disk presence/absence detection means for detecting the presence or absence of a disk at each disk storage position of the disk storage section 16 will be explained. As shown in FIG. 4, a moving member 108 is provided at the front end of the upper surface of each disk carrying unit 17. As shown in FIG. A pin portion 108a is provided approximately at the center of the movable member 108, and when the pin portion engages with a support protrusion 17a formed on the disk carrying unit 17, the movable member moves in the disk arrangement direction (vertical direction). ) is able to swing freely.
When the disk 15 is positioned and carried on the disk carrying unit 17, a portion of the lower surface of the disk engages the rear end 108b of the moving member 108, thereby causing the front end 108 of the moving member 108 to
c is designed to swing upward. Furthermore, the moving member 108 is formed so that the front end thereof is heavier than the rear end thereof, centering on the pin portion 108a.
When the disk 15 is removed from the disk carrying unit 17, the front end 10 of the moving member 108
8c is configured to swing downward. The state in which the front end portion 108c is swinging downward is referred to as the first position of the moving member 108, and the state in which the front end portion 108c is
The state in which 8c is swinging upward is referred to as the second position of the moving member. That is, the moving member 108 moves between the first position and the second position depending on the presence or absence of the disk. Aluminum foil is pasted on the surface of the front end 108c of the moving member 108 to reflect light. Fifth
As shown in the figure, the base 40 has a pair of small photo sensors 1 near the photo sensor 103.
09a and 109b are provided. These photo sensors 109a and 109b are connected to the moving member 108.
This is for detecting whether the position is at the first position or the second position. In addition, photo sensor 1
The detection by 09a and 109b is performed through a small window 17c formed in each disk carrying unit 17. The photo sensor 109a will be referred to as a first detection sensor, and the photo sensor 109b will be referred to as a second detection sensor. The above-described moving member 108 and the photo sensor 10
9a and 109b, the disk storage section 16
A disk presence/absence detection means is configured to detect the presence or absence of a disk at each disk storage position. Further, the disk presence/absence detection means and the base 40
, the disk gripping means including the movable chassis 64, the position detection means including the slit group 102, the counterweight 50, the rail 49,
the above-mentioned close contact means for bringing the counterweight into close contact with the rail 49; and guide shafts 36, 37;
These related peripheral small members constitute a disk ejecting and conveying mechanism that sequentially selects arbitrary disks in the disk storage section 16 and conveys them onto the performance device, that is, the turntable 31. Here, the pair of photo sensors 109a and 109b will be explained in detail. First, photo sensor 1 as the first detection sensor
09a is for detecting whether the moving member 108 is in the first position or the second position when the base 40 reaches a position where the disc gripping means can grip the disc. On the other hand, the photo sensor 109b detects when the moving member 109
The photo sensor 109 is for detecting whether the photo sensor 109 is in the first position or the second position.
For example, it is provided upwardly shifted by 3 mm or more with respect to a. As shown in FIG. 6, a bracket 110 is screwed to the left side surface of the lower end of the rail 49. As is particularly clear from FIG. 10b, a locking screw 110a is fitted into the bracket 110, and is prevented from coming off by a retaining ring 110b. The lock screw 110a is used to lock the base 40 to the housing 2 by tightening the lock screw 110a and threading it into a female threaded portion 40b protruding from the base 40. In addition,
A coil spring 110c for applying a bias force to the lock screw 110a is inserted into the lock screw 110a. A detection switch 111 is also fixed to the bracket 110 with a screw. This detection switch 111 is arranged so that when the lock screw 110a is tightened and the base 40 is locked, a portion of the lock screw 110a engages with the armature 111a of the detection switch. When the lock screw 110a is tightened and the base 40 is locked, the detection switch 111 operates,
All operations of the disc playing device are disabled. Next, a clamping mechanism for clamping the disk conveyed onto the turntable 31 by the disk ejecting and conveying mechanism will be explained. As shown in FIG. 2, the underbase 11
A bracket 112 is fixed above and behind the turntable 31. Figure 9 a and b
As shown in FIG. 1, a support member 113 is swingably attached to the upper end of the bracket 112 via a pin 113a. A pressing member 114 that cooperates with the turntable 31 to perform a disk clamping action is rotatably provided at one swinging end of the support member 113. Note that the disk is clamped by the pressing member 114 being attracted to the turntable 31 by magnetic force. In addition, the position indicated by the two-dot chain line in FIG. 9a is referred to as the non-clamping position of the support member 113, and
The position indicated by the solid line in is referred to as the clamp position of the support member. The swing angle θb of the support member 113 is, for example, 110°. The geared motor 1 is located at the right end of the bracket 112.
15 is fixed. A first lever member 116 is fitted onto the output shaft 115a of the geared motor 115. The rotating end of the first lever member 116 has a second lever member 117 with a pin 1 at one end.
It is rotatably attached via 17a.
The other end of this second lever member 117 is connected to the support member 1
It is pivotally attached to the other swinging end of 13 via a pin 117b. Note that the bracket 112 includes an auxiliary lever member 11 that rotates together with the first lever member 116.
A detection switch 119 is further provided for detecting completion of disk clamping by detecting the rotation angle of the auxiliary lever member. The geared motor 115, the first lever member 116, and the second lever member 117 described above constitute a driving means for driving the support member 113. Further, the drive means and the support member 113
and the pressing member 114 constitute a clamp mechanism that constitutes a disk clamp. FIG. 10a shows details of the slit group 102 formed in each disk carrying unit 17. As shown in FIG. 10a, each disk carrying unit 17 has four slits 102a,
102b, 102c and 102d are formed. Four photo couplers 103a, 103b, 103 provided in a straight line on the photo sensor 103
c and 103d, the position of the base 40 with respect to each disk carrying unit 17 is detected. Here, an address board 100, a photo sensor 10
1 and 103 will be explained below.
It should be noted that each disk carrying unit 17 that stores and carries disks has a total of 60 disks. First, the levelness of the 4-bit photo sensor 103 is checked, and the 6-bit photo sensor 101 is adjusted horizontally. Next, the center axis of the photo sensor 103 (indicated by 103e in FIG. 10a) and 30
The center axis 102e (shown in FIG. 10a) of the slit 102b formed in the disk carrying unit 17 is aligned with the center axis 102e, and in this state, the address plate 100 is
is moved up and down to align the center axis of the 6-bit photo sensor 101 with the center axis of the lower bit slit of the address plate. At this time, the address plate 100 is appropriately tilted to adjust the horizontal position of the address plate and the photo sensor 101. Next, the central axis 103e of the photo sensor 103
and the second and 60th disk carrying unit 17
At this time, it is confirmed whether the center axis of the 6-bit photo sensor 101 is aligned with the slit center axis of the lower bit of the address plate 100. After this,
The horizontal position of the 4-bit photo sensor 103 is aligned with the slit of the disk carrying unit 17.
The adjustment is thus completed. In addition, the mechanism as the above-mentioned embodiment is conceptually illustrated in a simplified form of wirework in the conceptual diagram of the mechanism in FIG. These conceptual diagrams of mechanisms are drawn based on the following conceptual abbreviation rules. Rules for the concept drawing method (a) As a general rule, the drawing should be viewed from a single viewpoint. However, the boundaries between diagrams at different viewpoint positions are indicated by two-dot chain lines. (b) A single member or group of members is indicated by a single solid line. However, portions that act as relatively wide force acting surfaces and portions that perform different functions even though they are on the same member are indicated by solid line frames as necessary. (c) Entry of reference marks and component names is permitted. (d) Write an arrow indicating the direction of movement, and write a number indicating the order of movement near the arrow. (e) Characteristics, conditions, vertical directions, mutual relationships between members, forms of movement, etc. of members are expressed using symbols as shown in the attached table. Please pay attention to consistency with existing symbols. (f) The ability to restore (reversibility) from a schematic drawing to a projected or perspective view is not required. (g) Allow abstraction and omission of parts related to the inventive concept with an emphasis on function.

【table】

[Table] Next, the operation of the disk playing device having the above-mentioned configuration will be briefly explained along with the playing means with reference to FIGS. 12 to 15. The disc playing device performs a disk loading operation according to the operational flow shown in FIG. 14, and performs an unloading operation according to the operational flow shown in FIG. 15. In the mechanical conceptual diagram shown in FIG. 11, the operations of each part of the disc playing device are indicated by circles in the order of their operation. Further, in the flowchart shown in FIG. 14, numbers for each of these operations are attached to the corresponding steps. Immediately after turning on the power to the device, the control circuit 120 (first
2) determines that the mechanical section is not in the transportation preparation state or the locked state (described above), and when the keyboard 7a of the music selection section 7 is operated to specify the disc to be played, the drive voltage is applied to the motor 44. is supplied, and the motor starts rotating. Therefore, the base 40 moves to a position where the disk gripping means can grip the designated disk. At this time, the control circuit 120 reads the absolute address of the address plate 100 using the photo sensor 101, and also reads the slit group 102 of the disk carrying unit 17 using the photo sensor 103. The transportation preparation state is a state in which the clamper made up of the pressing member 114 and the support member 113 presses the disk onto the turntable, and the gripping arm pair 73, 74 grips the disk, that is, the photo sensor 84 and the detection switch 99, This refers to a state in which an on signal is obtained from 119. The operation of the base 40 as the photo sensor 103 reads the slit group 102 will be described in detail. In FIG. 10a, if the disk holding unit 17 that grips a designated disk is the one in the center among the disk holding units 17 drawn in three layers, the photocouplers 103a and 103b of the photo sensor 103 are inserted into the slit. 102
Photocoupler 103 corresponds to a and 102b, respectively.
When the ON signal is obtained from a and 103b, motor 4
The drive voltage supply to the base 40 is cut off, and the base 40 is stopped. When the base 40 is stopped at a position where the disk gripping means can grip the disk, the control circuit 120 drives the motor 68 to move the disk gripping means including the movable chassis 64 toward the disk. When the photo sensor 106 confirms that the disk gripping means has moved and reached the disk gripping position, the motor 68 and therefore the disk gripping means are stopped. Next, the presence or absence of a disk is detected by a photo sensor 109a (shown in the fifth figure) as a first detection sensor. Once the existence of the disk is confirmed,
The motor 77 is driven, and the disk is gripped at three points by a spindle 71, which is a gripping rod, and a pair of gripping arms 73, 74. The photo sensor 84 and detection switch 99 indicate that the disc has been gripped.
When detected by
(This is defined as the distance β in the conceptual diagram of the mechanism in Figure 11.)
(indicated by ) move upward. By this movement of 3 mm, the fitted state between the positioning protrusion 18d, which is fitted into the disk center hole to position the disk, and the disk center hole is released. That is, the height of the positioning protrusion 18d (indicated by α in the conceptual diagram of the mechanism in FIG. 11) is 3 mm or less. Next, the motor 68 is rotated in the reverse direction, and the disk gripping means moves to the right while gripping the disk. When the photo sensor 106 confirms that the disc gripping means has moved a predetermined distance to the right and the gripped disc has reached directly above the turntable, the motor 68 is stopped. After that, the base 40 is moved downward and the disc is placed on the turntable, but if the selected song is recorded on the B side of the disc, that is, the top surface when the disc is stored, the motor 86 is driven and the disk is reversed. Here, the disk reversing operation will be described in detail. If the selected song is on the B side of the disc, the control circuit 120 first checks whether the base 40 is above or below the position corresponding to the 50th disc from the top. When the base 40 is located below the position corresponding to the 50th disk from the top, the base 40 is raised to the position of the 49th disk from the top. after that. The motor 86 is driven to reverse the disk and simultaneously lower the base. Note that the completion of the disk reversal is detected by the photo sensor 93. When the disc is placed on the turntable,
The geared motor 115 rotates to clamp the disk. When the detection switch 119 detects that the disc is clamped, the disc gripping state by the disc gripping means is released. The instrument is thus ready to be played, and the spindle motor 32, optical pickup 33, etc. are activated to start playing. When the performance is finished, the disc is returned to its original storage position by reversing the process described above. That is, when the performance of the disc 15 is finished, the disc is gripped by the gripping arms 73 and 74,
The disk clamp state is released. Thereafter, the device operates according to the operation flow shown in FIG. Here, as is clear from the flowchart of FIG. 15, in order to avoid engagement between the positioning protrusion 18d of the disk carrying unit 17 that is to carry the disk to be returned and the outer periphery of the disk, the disk gripping means grips the disk. With the base 40 raised by the predetermined distance β (approximately 3 mm) from the position obtained, the disk gripping means is moved to return the disk onto the positioning protrusion. Therefore, the base 40 is moved by the predetermined distance β from the position where the disc gripping means can grip the disc.
Due to the movement of the photo sensor 109a as the first detection sensor, the moving member 1 as the object to be detected is provided on the disk carrying unit.
The position of 08 cannot be detected. Then, for example, an accident may occur in which a disc that has finished playing is double-inserted into a disc storage position where another disc is already stored. In order to prevent such accidents, the photo sensor 10 as the second detection sensor is used.
9b is provided. That is, as described above, the photo sensor 109b is the same as the photo sensor 1.
Since it is located about 3 mm above relative to 09a, even if the base 40 is in the above position, the movable member 1
08 can be detected. Thereafter, the above operation is repeated according to the designated number of songs. Effects As detailed above, in the disc playing device according to the present invention, the disc presence/absence detection means for detecting the presence or absence of a disc at each disc storage position of the disc storage section 16 is provided in the disc storage section 16 corresponding to each disc storage position. A moving member 108 is provided and moves between a first position and a second position depending on the presence or absence of a disk, and a base 40 moves along the disk arrangement direction of the disk storage section and carries a disk gripping means. and a first detection sensor 109a that detects whether the moving member is in the first position or the second position. Therefore, since the presence or absence of a disc is quickly detected at the same time as the base is moved, no time is wasted playing the disc. Further, in the disc playing device according to the present invention, the disc presence/absence detection means moves together with the base, and when the base has moved a predetermined distance from a position where the disc gripping means can grip the storage disc, the moving member A second detection sensor 109b is provided to detect whether 108 is in the first position or the second position. In the disc playing device according to the present invention, positioning protrusions 18d are provided at each disc storage position of the disc storage section 16 to position the stored discs by protruding in the disc arrangement direction and fitting into the disc center holes. The take-out and conveyance mechanism transports the disk after moving the disk a predetermined distance in the disk arrangement direction and releasing the fitted state of the disk center hole with the positioning protrusion. In order to avoid engagement between the positioning protrusion 18d and the outer periphery of the disk, when the disk is to be stored in the original storage position again, the base 40 is moved by the predetermined distance from the position where the disk gripping means can grip the disk. It is necessary to move the disk gripping means while the disk is moving to return the disk onto the positioning protrusion. Here, if the first detection sensor is unable to detect the position of the moving member 108 because the base 40 has moved by the predetermined distance from the position where the disk gripping means can grip the disk. For example, an accident may occur in which a disc that has finished playing is double-inserted into a disc storage position where another disc is already stored. In order to prevent such accidents, the second detection sensor 109
b is provided. As another means to avoid such an accident, the movable member 108 may be made larger so that the base 4
It is conceivable that the moving position of the moving member can be detected by the first detection sensor 109a even if the disc gripping means has moved a predetermined distance from the position where the storage disc can be gripped. When the moving direction of the moving member is in the disk arrangement direction, the size of the disk storage section in the disk arrangement direction must necessarily be increased. That is, by providing the second detection sensor 109b, the above-mentioned accident can be avoided without increasing the size of the disk storage section 16.

[Brief explanation of drawings]

FIG. 1 is a front view of a disc playing device according to the present invention, FIG. 2 is an overall perspective view of the internal structure of the disc playing device, FIGS. 3 and 4 are detailed perspective views of the disc storage section, and FIG. 5 6 is a perspective view showing the base and its peripheral members, FIG. 7 is a detailed perspective view of the disk gripping means for gripping the disk, FIG. 8 is a plan view including a partial cross section of the disk gripping means, and FIG. 9 Figures a and b are a side view and a rear view of the clamp mechanism, respectively; Figure 10a is a diagram for explaining the slit and detection sensor formed in the disk carrying unit which is a component of the disk storage section; Figure 10 b
11 is a conceptual diagram conceptually and wire-likely representing the internal mechanism of the disc playing device as an embodiment of the present invention, and FIG. Figures 13 to 15 showing the configuration of the drive control system are flowcharts for explaining the operation of the disc playing device. Explanation of symbols of main parts, 1...Disk performance device, 2...Housing, 3...Door, 3a...Glass plate, 5...Operation section, 6...Adjustment section, 7...Track selection section, 8... ... Coin receiver, 10 ... Caster, 1
1...Underbase, 12...Frame, 15
...Disk, 16...Disk storage section, 17...
...Disk carrying unit, 17a...Support protrusion,
17c...Small window, 18...Plate member, 18c...
Semicircular disk storage section, 18d... Positioning protrusion, 18e... Vertex portion, 20, 21, 22...
Shaft, 20a...first threaded part, 20b...second threaded part, 24...receiving plate, 24a...stop ring, 25...pressing plate, 26...nut, 26a...washer, 27, 41d, 57,82
a, 82b, 91, 96a, 96b...Coil spring, 29...Upper base, 29a, 4
3a, 55a, 59a, 68a, 110, 112
... Bracket, 29b, 43b, 88 ... Small spindle, 29c, 43c, 43d, 44b, 6
6a, 66b...Toothed belt wheel, 31...Turntable, 32...Spindle motor, 33...
Optical pick-up, 36, 37, 61... Guide shaft, 40... Base, 40a... Cylindrical portion, 41a, 41b, 56, 59... Roller, 4
1c... Lever, 44, 68, 77, 86... Motor, 44a... Fixed plate, 46, 47, 6
7...Toothed belt, 49...Rail, 50...Counterweight, 51, 52...Pulley, 53...
... wire, 55 ... swinging member, 62, 63 ... divided chassis, 63a ... guide section, 64 ... movable chassis, 66c, 88a ... worm wheel, 68b, 86b ... worm, 71 ... spindle, 71a...Gripping block, 71b, 75
a, 75b, 77a, 78a, 88b...gear,
72...Frame, 72a, 87b, 113a,
117a...pin, 72c, 79a...projection,
73, 74...Gripping arm, 73a, 74a...
Tip part, 73b, 74b...Rack part, 73d,
74d...long hole, 78...screw shaft,
78b... Screw part, 79... Movable bracket, 81... Slider, 81a, 87a... Light shielding plate, 84, 93, 101, 103, 106, 1
09a, 109b...Photo sensor, 86a,...
...Coupler, 87... Holding member, 90... Stopper, 95... Movable piece, 99, 111, 119...
Detection switch, 100, 105...address board,
102...Slit group, 102a, 102b, 1
02c, 102d, 105a, 105b...slit, 103a, 103b, 103c, 103d
...Photocoupler, 103e...Central axis, 108
...Moving member, 108a...Pin portion, 108b...
...Rear end, 108c...Front end, 110a...Lock screw, 113...Support member, 114...Press member, 115...Geared motor, 115a...
Output shaft, 116... First lever member, 117...
Second lever member, 118...Auxiliary lever member, 1
20...Control circuit.

Claims (1)

[Claims] 1. A disc storage unit capable of sequentially arranging and storing a plurality of discs, a disc playing means, and a disk ejecting and transporting mechanism that sequentially selects and transports arbitrary discs in the disc storage unit to a playing position, The mechanism includes a base movable along the disk arrangement direction of the disk storage section, a disk gripping means provided on the base so as to be movable in a direction substantially perpendicular to the disk arrangement direction and gripping a selected disk; a disk presence/absence detection means for detecting the presence or absence of a disk at each disk storage position of the disk storage section, and a disk storage unit that protrudes in the disk arrangement direction and fits into the disk center hole to be stored in each disk storage position. A positioning protrusion for positioning the disk is provided, and the disk ejecting and conveying mechanism moves the disk a predetermined distance in the disk arrangement direction and releases the fitted state between the disk center hole and the positioning protrusion, and then transports the disk. , the disk presence/absence detection means is provided in the disk storage section in correspondence with each of the disk storage positions, and moves together with a movable member that moves between a first position and a second position depending on the presence or absence of a disk, and the base. a first detection sensor that detects whether the movable member is in the first position or the second position when the base reaches a position where the disc gripping means can grip the disc; a second step for detecting whether the movable member is in either the first position or the second position when the base has moved by the predetermined distance from a position where the disc gripping means can grip the disc; A disc performance device comprising a detection sensor.